JP2003063600A - Pumping device and kerosene centralized supply system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a kerosene centralized supply system not requiring a large pump and also to provide a pumping device suitable for such a kerosene centralized supply system. SOLUTION: By a pumping devices 14 and 15 having units 14a to 14d and 15a to 15d where a suction electromagnetic pump MPs and a force electromagnetic pumps MPd and MPd' are connected in series so that the force electromagnetic pumps are placed at the downstream, kerosene is fed to a plurality of kerosene consumers at lower floors and higher floors. In the suction electromagnetic pump MPs, suction and ejection are executed by the current conduction to a magnetic coil, and accompanying the cancellation of current conduction to the magnetic coil, a plunger position restoration operation is executed by a return coil spring. In the force electromagnetic pumps MPd and MPd', a plunger position deflection operation is executed by the current conduction to the magnetic coil, and accompanying the cancellation of current conduction to the magnetic coil, suction and ejection are executed by the return coil spring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device and a kerosene supply system using the pump device, and more particularly to a system for centrally supplying kerosene from kerosene tanks to kerosene consumers living on each floor of a multi-story building. And a pump device preferably used therefor.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
The supply of kerosene used as fuel in ordinary households is
This is done by each kerosene consumer (such as each household) individually purchasing from kerosene suppliers in small quantities, such as in portable tanks. In this case, kerosene is injected into each kerosene burning device such as a kerosene water heater or a device tank of a kerosene heater at each home.

However, in recent years, kerosene tanks have been installed in advance outdoors, for example, on the ground or underground, for each kerosene consumer or for an aggregate of a plurality of kerosene consumers (e.g., an apartment house), and kerosene combustion of each household from the kerosene tank. Systems for supplying kerosene to equipment through kerosene piping have begun to spread. Although such a kerosene supply system requires initial investment, once the system is constructed, the kerosene supplier supplies kerosene to each kerosene consumer and the charges from each kerosene consumer There is an advantage that the collection and supply of kerosene to the kerosene burning equipment for each kerosene consumer become easy.

Particularly, in the case of an apartment house in which a kerosene consumer lives on each floor of a multi-story building, a kerosene tank shared by a large number of kerosene consumers is installed in advance and a large number of kerosene demands are supplied from the shared kerosene tank. The advantage of the kerosene centralized supply system for supplying kerosene to people is great. In the case of such an apartment house in which a large number of kerosene consumers live, a shared kerosene tank having a large capacity is required accordingly, so that the shared kerosene tank is generally buried underground.

Conventionally, in the case of a multi-story apartment house, in order to supply kerosene to each kerosene consumer, kerosene is temporarily fried from a shared underground kerosene tank to a roof tank, and the height difference from the roof tank is used. Then, it is distributed to each kerosene consumer on each floor. For this reason, it is necessary to install a tank with a relatively large capacity on the roof of the building, and once it is detected that the remaining amount of kerosene in the roof tank has reached the allowable minimum amount (for example, the maximum allowable amount). Since the kerosene is replenished to the roof tank until the amount reaches the limit), a pump with a relatively large capacity is required.

Kerosene is always stored in the rooftop tank, and the rooftop of the building changes greatly in the natural environment. For example, the temperature difference in the rooftop tank between day and night is often 50 ° C. or more. A crack, a gap, or a looseness may occur in a roof tank or a connecting portion between the roof tank and a kerosene pipe connected to the roof tank, and kerosene may leak from there.

Accordingly, one object of the present invention is to provide a kerosene centralized supply system which does not require a large capacity pump device. Another object of the present invention is to provide a pump device suitable for such a kerosene centralized supply system.

Still another object of the present invention is that it does not require a large capacity tank other than a shared kerosene tank, the possibility of damaging equipment such as pipes and tanks used in the kerosene supply system is low, and kerosene supply is possible. It is an object of the present invention to provide a kerosene supply system with a low possibility of kerosene leakage from the system.

[0009]

According to the present invention, in order to achieve the above objects, a suction electromagnetic pump and a lifting electromagnetic pump are connected in series so that the lifting electromagnetic pump is located on the downstream side. At least one connected pump unit is provided, and an electromagnetic coil of the suction electromagnetic pump and a current supply circuit for supplying intermittent driving current to the electromagnetic coil of the lifting electromagnetic pump are provided. The electromagnetic pump for siphoning sucks and sucks the plunger with a displacement of the plunger position by applying a force in the first direction to the plunger by energizing the electromagnetic coil.
When the discharge is executed and the electromagnetic coil is de-energized, a return coil spring applies a force in the second direction opposite to the first direction to the plunger, whereby the plunger position restoring operation is executed. The push-up electromagnetic pump performs a plunger position displacement operation by applying a force in a third direction to the plunger by energizing the electromagnetic coil, and the return coil spring causes the plunger to move by canceling the energization of the electromagnetic coil. There is provided a pump device characterized in that a suction force and a discharge force are executed together with a plunger position restoring operation by applying a force in a fourth direction opposite to the third direction to the.

In one aspect of the present invention, the plurality of pump units are connected in parallel. In one aspect of the present invention, at least one of the pump units is a spare having the same configuration as at least one of the other pump units.

In one aspect of the present invention, in the current supply circuit, the suction / discharge of the suction electromagnetic pump and the push-up electromagnetic pump are in the same phase in each or all of the pump units. To drive.

In one aspect of the present invention, the electromagnetic pump for pushing up includes a check valve arranged in a flow path downstream of the discharge valve, and a check valve between the check valve and the discharge valve is provided. An air vent valve connected to the flow path is provided. In one aspect of the present invention, at least one of the sucking electromagnetic pump and the pushing electromagnetic pump includes an accumulator connected to a flow passage downstream of the discharge valve.

In one aspect of the present invention, at least one of the lifting electromagnetic pumps includes a piston that moves together with the plunger, a cylinder to which the piston fits, and a flow path formed in the piston. A check valve that allows passage of fluid from the inside to the outside of the cylinder. In one aspect of the present invention, at least one of the lifting electromagnetic pumps includes a piston that moves together with the plunger, a cylinder to which the piston fits, and a suction valve and a discharge valve that communicate with the inside of the cylinder. And a second region that is located outside the cylinder and that communicates with the first region.

Further, according to the present invention, in order to achieve the above object, kerosene is supplied to a plurality of kerosene consumers on a plurality of floors from the common kerosene tank through the kerosene supply pipe by the above pump device. A centralized kerosene supply system is provided.

In one aspect of the present invention, the pump device and the kerosene supply pipe are separately prepared for the lower floors and the higher floors, and the pump device for the lower floors is compared with the electromagnetic pump for pushing up. The pump device for higher floors uses a relatively small flow rate and large pressure as the lifting electromagnetic pump.

In one aspect of the present invention, in the electromagnetic pump for pushing up of the pump device for the lower floor, a piston moving together with the plunger, a cylinder to which the piston fits, and a flow passage formed in the piston. And a check valve that allows passage of fluid from the inside of the cylinder to the outside through the cylinder, the electromagnetic pump for pushing up of the pump device for the upper floors, a piston that moves together with the plunger, and A cylinder to which the piston fits; a first region in communication with the inside of the cylinder and in which fluid is allowed to flow in a particular direction by an intake valve and a discharge valve; and a first region in communication with the first region. And a second region located outside.

In one aspect of the present invention, the kerosene supply pipe has a common pipe and floor pipes respectively connected to the common pipe, and the common pipe is connected to the common kerosene tank via the pump. It is connected, each floor piping is connected through the respective indoor piping of the kerosene consumer and the consumer flow meter, and each floor kerosene tank is interposed between the common piping and each floor piping. There is. In one aspect of the present invention, a return pipe for collecting overflow kerosene from each floor kerosene tank to the shared kerosene tank is provided. In one aspect of the present invention, a control device that controls the operation of the pump device is provided, and a monitor signal of the amount of kerosene contained in each of the floor kerosene tanks is input to the control device, and the control device is The pump device is operated based on the monitor signal. In one aspect of the present invention, the detected flow rate signal of the consumer flow meter is input to the centralized meter reading board via the kerosene tank on each floor.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing a schematic structure of a kerosene centralized supply system according to the present invention. Living floor N of apartment
o. 1-No. Each of N (N is, for example, 8 to 15) has a plurality of kerosene consumer houses. The number of kerosene consumers belonging to each living floor is, for example, 4 to 10. Here, the living floor No. 1-No. n (n is, for example, 4 to 7) is the lower floor, and the living floor No. [N + 1] -No. N is defined as a higher floor.

In the housing complex, a shared underground kerosene tank 12, a low-rise floor pump device 14, a high-rise floor pump device 15, and a centralized meter reading board 16 are installed. An oil level meter is attached to the shared kerosene tank 12, and when the level meter reaches the allowable minimum level, kerosene is replenished to the tank 12.

The lower floor pump device 14 is provided with four pump units 14a, 14b, 14c and 14d. These four pump units have the same configuration, and two pump units 14a, 14 of them have the same configuration.
b is for normal operation, and the other two pump units 14c and 14d are for spare spares.

FIG. 2 is a schematic diagram showing the structure of the pump unit 14a (the same applies to the other pump units 14b, 14c, 14d). In the unit 14a, the suction electromagnetic pump MPs and the push-up electromagnetic pump MPd are arranged downstream of the push-up electromagnetic pump MPd.
Are connected in series so that That is, the suction-side flow path 1 of the suction electromagnetic pump MPs is connected to the common kerosene tank 12, and the discharge-side flow path 2 of the suction electromagnetic pump MPs and the suction-side flow path 3 of the lifting electromagnetic pump MPd are connected. A common pipe 71 for connecting the discharge side flow path 4 of the electromagnetic pump MPd for pushing up to each low-rise living floor for kerosene
It is supposed to be connected to.

In the suction electromagnetic pump MPs, a force in the first direction is applied to the electromagnetic coil by energizing the electromagnetic coil so that the plunger position is displaced and suction / discharge is performed, and the electromagnetic coil is deenergized. Along with this, a return spring applies a force in the second direction opposite to the first direction to the plunger, whereby the plunger position restoring operation is executed. As for the suction electromagnetic pump that performs such an operation, for example, Japanese Patent No. 29999
It is described in Japanese Patent Publication No. 99.

The push-up electromagnetic pump MPd performs a plunger position displacement operation by applying a force in the third direction to the plunger by energizing the electromagnetic coil, and a return spring is used by the return spring as the electromagnetic coil is de-energized. By applying a force in the fourth direction opposite to the third direction to the plunger, suction and discharge are performed together with the plunger position restoring operation. An electromagnetic pump for pushing up which performs such an operation is disclosed in, for example, Japanese Patent Laid-Open No. 6-288.
No. 341 and JP-A-9-112417.

FIG. 3 is a longitudinal sectional view showing an example of the structure of the suction electromagnetic pump MPs. In FIG. 3, a vertical tube column 22 is arranged inside the electromagnetic coil 21 wound around the vertical direction. An annular lower magnetic path member 23 and an annular upper magnetic path member 24 are arranged around the tube column 22 with a required gap. Ring-shaped core members 20, 20 ′ are arranged outside the lower magnetic path member 23 and the upper magnetic path member 24 at the lower end and the upper end of the electromagnetic coil 21, respectively.

In the tube column 22, a plunger 25 made of a material containing a magnetic material is slidable in the vertical direction.
Are arranged. A fluid flow path is formed in the plunger 25, and a check valve (discharge valve) that allows upward fluid flow in the flow path and blocks downward fluid flow.
26 are provided. The plunger 25 is provided in the tube column 22 and is arranged in a compressed state on the upper side.
7 and the auxiliary coil spring 28 arranged in a compressed state on the lower side, and the pressing force of these springs and the like stop at a vertical position indicating a balance. This position is deviated below the intermediate height between the upper end of the lower magnetic path member 23 and the lower end of the upper magnetic path member 24.

A suction side joint 29 is connected to the lower portion of the pipe column 22, and a check valve (suction valve) that allows upward fluid flow and blocks downward fluid flow inside the suction side joint 29. 30 are provided. A discharge side joint 31 is connected to an upper portion of the pipe column 22, and a check valve 32 that allows upward fluid flow and blocks downward fluid flow is provided in the discharge side joint 31. 33 is a casing.

By energizing the electromagnetic coil 21, a magnetic circuit is formed by including the core member 20 ', the upper magnetic path member 24, the plunger 25, the lower magnetic path member 23, the core member 20 and the casing 33. An electromagnetic force (a force in the first direction) for moving upward is applied to 25. Due to this electromagnetic force, the plunger 25 moves upward against the pressing force of the return coil spring 27. When the plunger 25 moves upward, the fluid pressure rises above the check valve 26, so that the check valve 32 opens and the check valve 26 opens.
On the lower side, since the fluid pressure decreases, the check valve 30 opens, fluid is sucked into the pump through the suction side joint 29, and fluid is discharged to the outside of the pump through the discharge side joint 31. . This is the execution of suction / discharge by the plunger position displacement operation.

When the electromagnetic coil 21 is de-energized, the electromagnetic force disappears, and the plunger 25 moves downward due to the repulsive force of the return coil spring 27 (force in the second direction). When the plunger 25 moves downward, the check valve 2
The fluid pressure rises below 6 and the fluid pressure falls below 6 so that the check valve 26 opens and the fluid under the plunger 25 moves upward. This is the execution of the plunger position restoration operation.

By repeating the energization of the electromagnetic coil 21 and its elimination as described above, a pump action is performed.

FIG. 4 is a longitudinal sectional view showing an example of the structure of the electromagnetic pump MPd for pushing up. In FIG. 4, a vertical tube column 42 is arranged inside an electromagnetic coil 41 wound around the vertical direction. An annular lower magnetic path member 43 and an annular upper magnetic path member 44 are arranged around the tube column 42 with a required gap. Ring-shaped core members 40, 40 ′ are arranged outside the lower magnetic path member 43 and the upper magnetic path member 44 at the lower end and the upper end of the electromagnetic coil 41, respectively.

In the tube column 42, a plunger 45 made of a material containing a magnetic material is slidable up and down.
Are arranged. A vertical cylinder 54 is arranged below the plunger 45 in the pipe column 42, and a piston 55 is inserted in the cylinder 54 so as to be vertically reciprocally slidable. The upper end of the piston 55 is in contact with the lower end of the plunger 45. A fluid flow path is formed in the plunger 45 and the piston 55, and a check valve (discharge valve) 46 that allows upward fluid flow in the flow path and blocks downward fluid flow is provided. It is provided so as to be sandwiched by the piston 55 and the plunger 45. Plunger 45 and piston 5
5 is pinched by a return coil spring 47 arranged in a compressed state on the lower side and an auxiliary coil spring 48 arranged in a compressed state on the upper side in the pipe column 42, and the pressing force of these springs balances each other. It is stopped at the vertical position as shown. The position of the plunger 45 is set to the lower magnetic path member 43.
Of the upper magnetic path member 44 and the lower end of the upper magnetic path member 44.

A suction side joint 49 is connected to the lower portion of the pipe column 42, and a check valve (suction valve) which allows upward fluid flow and blocks downward fluid flow in the suction side joint 49. 50 are provided. A discharge side joint 51 is connected to an upper portion of the pipe column 42, and a check valve 52 that allows upward fluid flow and blocks downward fluid flow is provided in the discharge side joint 51. 53 is a casing.

The check valve 52 is arranged in the flow passage downstream of the discharge valve 46, and the air bleeding valve 56 and the accumulator 57 are connected to the flow passage between the check valve 52 and the discharge valve 46. ing. In the suction electromagnetic pump MPs, similarly, an accumulator can be connected to the flow path between the check valve 32 and the discharge valve 26.

By energizing the electromagnetic coil 41, a magnetic circuit is formed including the core member 40 ', the upper magnetic path member 44, the plunger 45, the lower magnetic path member 43, the core member 40, and the casing 53. An electromagnetic force (a force in the third direction) that moves downward is applied to 45. By this electromagnetic force, the plunger 45 and the piston 5
5 moves downward against the pressing force of the return coil spring 47. During the downward movement of the plunger 45 and the piston 55, the fluid pressure drops above the check valve 46 and rises above the check valve 46, so the check valve 46 opens.
The fluid in the piston 55 on the lower side of the plunger 45 is transferred to the upper side. This is the execution of the plunger position displacement operation.

When the energization of the electromagnetic coil 41 is canceled, the electromagnetic force disappears. Therefore, the plunger 45 and the piston 55
Moves upward due to the repulsive force of the return coil spring 47 (force in the fourth direction). During upward movement of the plunger 45 and the piston 55, the fluid pressure rises above the check valve 46, so the check valve 52 opens, and the fluid pressure falls below the check valve 46, so the check valve 50 opens, fluid is sucked into the pump through the suction side joint 49, and fluid is discharged to the outside of the pump through the discharge side joint 51. This is the execution of suction / discharge by the plunger position restoring operation.

By repeating the energization of the electromagnetic coil 41 and its elimination as described above, a pump action is performed.

As shown in FIG. 2, AC 10 is applied to the electromagnetic coil 21 of the suction electromagnetic pump MPs and the electromagnetic coil 41 of the lifting electromagnetic pump MPd of the pump units 14a to 14d in the lower floor pump device 14.
A current supply circuit for supplying intermittent driving current from a 0 V power source (frequency 50 Hz or 60 Hz) is provided. The current supply circuit supplies pulsating or pulsed intermittent drive currents, which are half-wave integers of the alternating current by rectifying elements Ds, Dd such as diodes, to the electromagnetic coils 21, 41 in opposite phases. Suction electromagnetic pump M
As described above, in the case where the phases of the current supply cycles are opposite, the phases of the vertical reciprocating cycles of the plungers 25 and 45 are aligned between the Ps and the electromagnetic pump MPd for pushing up, so that the suction and discharge are in the same phase.

The ON / OFF of the supply of the drive current to each of the pump units 14a to 14d is controlled by the control device described later. Fluid (kerosene) to lower floors during normal operation
One or both of the pump units 14a and 14b are driven according to the flow rate required for the supply of.
The pump units 14c and 14d are the pump units 14
If at least one of a and 14b fails,
Instead, it is driven appropriately.

Although the pump device 14 for the lower floors has been described above, the pump device 15 for the higher floors will be described below.

The high-rise pump unit 15 comprises four pump units 15a, 15b, 15c, 15d. These four pump units have the same configuration, and two pump units 15a, 15
b is for normal operation, and the other two pump units 15c and 15d are for spare spares.

Like the pump units 14a to 14d, each of the pump units 15a to 15d has a suction electromagnetic pump and a lifting electromagnetic pump connected in series so that the lifting electromagnetic pump is located on the downstream side (upper side in the figure). Connected to. However, in the pump units 15a to 15d, the pump unit 14 is used as an electromagnetic pump for pushing up.
Compared with the electromagnetic pumps MSd for pushing up a to 14d, those having a small flow rate but a large discharge pressure are used. Regarding such an electromagnetic pump for pushing up a small flow rate and a large pressure, for example, Japanese Utility Model Publication 5-11351 and Japanese Utility Model Publication 5-11
It is described in Japanese Patent Publication No. -11353.

FIG. 5 is a vertical cross-sectional view showing an example of the structure of an electromagnetic pump MPd 'for pushing up a small flow rate and a large pressure. Further, FIG. 6 is a cross-sectional view thereof. 5 and 6, members having the same or similar functions as those in FIG. 4 are designated by the same reference numerals.

In the push-up electromagnetic pump MPd ', no passage is formed in the piston 55. Further, the check valve is not arranged between the upper end of the piston 55 and the lower end of the plunger 45, but the through hole member 61 is arranged. A region X between the piston 55 and the pipe column 42 communicates with a fluid passage in the plunger 45 via a through hole formed in the through hole member 61.

A suction side joint 49 is connected to the lower portion of the tube column 42 via a body member 62. The cylinder 54 is attached to the main body member 62, and the main body member is formed with a region Z communicating with a region Y below the lower end of the piston 55 in the cylinder. The region Z is formed between a check valve (suction valve) 64 arranged on one end side and a check valve (discharge valve) 65 arranged on the other end side. Area Z
Is connected to the inside of the suction side joint 49 via a suction valve 64, and is connected to the region X via a discharge valve 65 and a communication passage (not shown). The suction valve 64 allows the fluid to flow from the suction side joint 49 into the area Z, and the discharge valve 65.
Allows the fluid to flow from zone Z towards zone X. The total volume of the regions Y and Z depends on the vertical position of the piston 55.

In FIG. 6, the body member 62 is provided with a relief valve 66 and an accumulator 67 in a region W which can communicate with the region X by a communication passage (not shown). The fluid leaking from the relief valve 66 is returned to the inside of the suction side joint 49 via the return passage 68.

By energizing the electromagnetic coil 41, a magnetic circuit is formed including the core member 40 ', the upper magnetic path member 44, the plunger 45, the lower magnetic path member 43, the core member 40, and the casing 53, and the plunger is thereby formed. An electromagnetic force (a force in the third direction) that moves downward is applied to 45. By this electromagnetic force, the plunger 45 and the piston 5
5 moves downward against the pressing force of the return coil spring 47. During the downward movement of the plunger 45 and the piston 55, the fluid pressure rises in the entire regions Y and Z, so that the discharge valve 65 opens and the fluid in the regions Y and Z is transferred to the region X. However, at that time, the entire volume including the region X and the flow path in the plunger 45 and reaching the check valve 52 increases by the amount of the piston 55 inserted into the cylinder 54. Therefore, the pressure of the fluid in the region X is almost unchanged, and the fluid does not substantially flow out through the check valve 52.
This is the execution of the plunger position displacement operation.

When the electromagnetic coil 41 is de-energized, the electromagnetic force disappears. Therefore, the plunger 45 and the piston 55
Moves upward due to the repulsive force of the return coil spring 47 (force in the fourth direction). When the plunger 45 and the piston 55 move upward, the fluid pressure drops in the entire regions Y and Z, so that the suction valve 64 opens and the fluid is sucked into the regions Y and Z. At that time, the entire volume including the flow path in the region X and the plunger 45 and reaching the check valve 52 is reduced by the amount that the piston 55 is pulled out from the cylinder 54. Therefore, the pressure of the fluid in the region X increases, and the fluid flows out via the check valve 52. This is the execution of suction / discharge by the plunger position restoring operation.

By repeating the energization of the electromagnetic coil 41 and its elimination as described above, a pump action is performed.

In the electromagnetic pump MPd 'for pushing up, since no passage is formed inside the piston 55, the piston 5
The outer diameter of 5 can be made sufficiently small. As a result, a large flow rate can be achieved even though the flow rate is small, and a fluid can be supplied to higher floors of 30 m or more.

The current supply circuit for supplying intermittent driving current to the electromagnetic coil 21 of the suction electromagnetic pump MPs and the electromagnetic coil 41 of the lifting electromagnetic pump MPd 'of the pump units 15a to 15d in the pump unit 15 for higher floors is , 100 V AC power source (frequency 50 Hz or 60) in the same manner as in the case of the lower floor pump device 14.
Hz) to supply intermittent driving current. The current supply circuit supplies a pulsating or pulsed intermittent drive current obtained by half-wave integerizing the alternating current by a rectifying element such as a diode to the electromagnetic coils 21 and 41 in opposite phases. As described above, in the suction electromagnetic pump MPs and the push-up electromagnetic pump MPd ′, when the phases of the current supply cycles are opposite to each other, the phases of the vertical reciprocating cycles of the plungers 25 and 45 are aligned, so that the suction and discharge are the same. It becomes a phase.

The ON / OFF of the supply of the drive current to each of the pump units 15a to 15d is controlled by the control device described later. Fluid (kerosene) to higher floors during normal operation
One or both of the pump units 15a and 15b are driven according to the flow rate required for the supply of.
The pump units 15c and 15d are the pump units 15
If at least one of a and 15b fails,
Instead, it is driven appropriately.

In the pump units of the pump devices 14 and 15 as described above, the suction electromagnetic pump MPs and the lifting electromagnetic pumps MPd and MPd 'are connected in series so that the lifting electromagnetic pump is on the downstream side. Therefore, the electromagnetic pumps MPs for sucking up the kerosene from the underground shared tank 12 of the kerosene centralized supply system to the pump devices 14 and 15 are made to take charge, and furthermore, the kerosene pump pumps the kerosene tanks 80 on the lower floors and the upper floors. The pumping electromagnetic pumps MPd and MPd ′ are used for pumping up to, and it is possible to efficiently and centrally supply kerosene with a small and simple structure.

Further, particularly in the case of a pump unit for high floors, it is important to secure a flow rate at a high discharge pressure. In the present invention, in particular, by driving the suction electromagnetic pump MPs and the push-up electromagnetic pump MPd ′ so that their suction and discharge are in the same phase, a larger flow rate at high pressure is possible. This was confirmed by the following experiment.

Experimental Example : PQ characteristics (that is, pressure-flow rate characteristics) were measured for the pump units 15a and 15b and the electromagnetic pumps constituting them in the configuration of the above embodiment. The experiment was carried out with a measuring device configuration as shown in FIG. In FIG. 7, the tip of a pipe connected to the suction side of the pump system to be measured is extended to below the kerosene surface, and a throttle valve TV1 is arranged in the pipe on the suction side, and a negative valve is provided between the throttle valve TV1 and the pump system to be measured. Connect a vacuum gauge VG for pressure measurement,
Connect the throttle valve TV2 to the pipe connected to the discharge side of the pump system under test.
Was arranged, and a pressure gauge PS for measuring the discharge pressure was arranged between the valve TV2 and the pump system to be measured. The discharge pressure was set by adjusting the relief valve TV2. The suction head was -600 mm. In the table below, the sealing pressure is a measured value when the throttle valve TV1 is fully opened and the throttle valve TV2 is sealed, and the negative pressure is a measured value when the throttle valve TV1 is sealed and the throttle valve TV2 is fully opened. Is.

The pump system to be measured is the suction electromagnetic pumps MPs1 and MPs2 and the lifting electromagnetic pump MPd '.
1, MPd'2 were connected as shown in the figure, and a part thereof was removed as needed. AC1 common to these electromagnetic pumps
A pulsed current half-wave rectified by a diode D is supplied from an AC power source of 00V50Hz. The direction of current passage permission of each diode D was set as needed.

(1) First, only the suction electromagnetic pump MPs1 as the pump system to be measured (MPd'1 is removed: MP
The measurement was performed in the case where s2 and MPd′2 were removed and this route was blocked, and in the case of only the electromagnetic pump MPd′1 for lifting (MPs1 removed: MPs2 and MPd′2 removed and this route blocked). The results (flow rate) are shown in Table 1.
(The unit of flow rate is liter / h: the same applies hereinafter).

[0058]

[Table 1]

(2) Next, as the pump system to be measured, the suction electromagnetic pump MPs1 and the lifting electromagnetic pump MP
The measurement was performed only for d'1 (MPs2 and MPd'2 were removed and this pathway was blocked). Direction of current passage permission of diode D interposed in the power supply path to MPs1 and M
When the direction of permitting current passage of the diode D interposed in the power supply path to Pd′1 is the same (intake and discharge phases are opposite)
The measurement was performed in two cases, that is, the opposite case (intake and discharge phases are the same). The results are shown in Table 2.

[0060]

[Table 2]

From these results, it can be seen that the case where the direction of the diode D is reversed shows a better PQ characteristic.

(3) Next, the measurement was carried out in the case where all of the suction electromagnetic pumps MPs1 and MPs2 and the lifting electromagnetic pumps MPd'1 and MPd'2 were used as the pump system to be measured. The following four cases were measured for the combinations of the directions in which the diode D interposed in the power supply paths of these four electromagnetic pumps was allowed to pass current. The results are shown in Table 3.

A: The direction of the diode D is the same for all four electromagnetic pumps B: The direction of the diode D is the same in the unit of MPs1 and MPd'1; The direction of the diode D is the same in the unit of MPs2 and MPd'2 The direction of the diode D is reversed between the unit of MPs1 and MPd'1 and the unit of MPs2 and MPd'2 C: the direction of the diode D is reversed within the unit of MPs1 and MPd'1; within the unit of MPs2 and MPd'2 Then, the direction of the diode D is opposite; the direction of the diode D is the same between MPs1 and MPs2; the direction of the diode D is the same between MPd′1 and MPd′2 D: The direction of the diode D in the unit of MPs1 and MPd′1 In the unit of MPs2 and MPd'2, the direction of the diode D is opposite; in MPs1 and MPs2, the direction of the diode D is opposite; MP The direction of the diode D is opposite between d'1 and MPd'2

[0064]

[Table 3]

From this result, the diode D
It can be seen that the case of C and the case of D in which the directions of are set reversely show more excellent PQ characteristics.

FIG. 8 is a schematic diagram showing the overall configuration of the consumer flow meter 81, particularly the flow rate detection system. These flow meters are
For example, it is an indirectly heated thermal flow meter as described in Japanese Patent Application Laid-Open No. 11-118566, and an electric signal corresponding to an instantaneous flow rate or an integrated flow rate of kerosene flowing in a kerosene flow passage (pipe) is provided. Output.

The end portions of the fin plates 124, 124 ′ of the flow rate detecting unit 104 and the fluid temperature detecting unit 106 have fluid flow passages 103 formed in the flow passage member 102.
It extends inside. Fin plate 124, 124 '
Extends in the fluid flow passage 103 having a substantially circular cross section through the center of the cross section. The fin plates 124 and 124 ′ have the fluid (kerosene) flow passage 103.
Since it is arranged along the flow direction of the fluid inside, the heat can be satisfactorily transferred between the fluid and the flow rate detection unit 122 and the fluid temperature detection unit 122 ′ without significantly affecting the fluid flow. Is possible. Fluid flow passage 10
The direction of fluid flow within 3 is indicated by an arrow.

The DC voltage V1 is supplied to the bridge circuit (detection circuit) 140. The bridge circuit 140 includes a thin film temperature sensor 141 for flow rate detection of the flow rate detection unit 104 and a thin film temperature sensor 141 ′ for temperature compensation of the fluid temperature detection unit 106.
And resistors 143 and 144. The potentials Va and Vb at points a and b of the bridge circuit 140 are input to the differential amplification / integration circuit 146.

On the other hand, the DC voltage V2 is applied to the thin film heating element 1 via the transistor 150 for controlling the current supplied to the thin film heating element 148 of the flow rate detecting unit 104.
48. That is, in the flow rate detection unit 122, based on the heat generation of the thin film heating element 148, the flow rate detection unit 122 is affected by the heat absorption by the fluid to be detected via the fin plate 124,
The temperature sensing by the thin film temperature sensing element 141 is executed. Then, as a result of the temperature sensing, a difference between the potentials Va and Vb at the points a and b of the bridge circuit 140 is obtained.

The value of (Va-Vb) changes as the temperature of the flow rate detecting temperature sensing element 141 changes according to the flow rate of the fluid. In advance, the resistors 143, 14 of the bridge circuit 140
By appropriately setting the resistance value of No. 4, the value of (Va-Vb) can be made zero in the case of a desired fluid flow rate serving as a reference. With this reference flow rate, the differential amplification / integration circuit 1
The output of 46 is constant (a value corresponding to the reference flow rate), and the resistance value of the transistor 150 is also constant. In that case, the partial pressure applied to the thin film heating element 148 also becomes constant,
The voltage at point P at this time indicates the reference flow rate.

When the fluid flow rate increases or decreases, the output of the differential amplification / integration circuit 146 has a polarity (depending on the positive / negative of the resistance-temperature characteristic of the flow rate detecting temperature sensor 141) and a magnitude according to the value of (Va-Vb). Changes, and the output of the differential amplification / integration circuit 146 changes accordingly.

When the flow rate of the fluid increases, the temperature of the flow rate detecting temperature sensing element 141 decreases, so that the thin film heating element 148.
To increase the calorific value of (that is, increase the power),
From the differential amplifier / integrator circuit 146, a control input for reducing the resistance value of the transistor 150 is applied to the base of the transistor 150.

On the other hand, when the flow rate of the fluid is decreased, the temperature of the flow rate detecting temperature sensing element 141 is increased, so that the heat generation amount of the thin film heating element 148 is decreased (that is, the power is decreased).
The differential amplifier / integrator circuit 146
A control input is applied to the base of the transistor 50 so as to increase the resistance value of the transistor 150.

As described above, the heat generation of the thin film heating element 148 is feedback-controlled so that the temperature detected by the flow rate detecting temperature sensing element 141 always becomes the target value regardless of the change in the fluid flow rate. The voltage (voltage at point P) applied to the thin-film heating element 148 at that time corresponds to the fluid flow rate, and is taken out as a flow rate output. This flow rate output is A / D converted by the A / D converter 152, integrated by the CPU 154, and then displayed by the integrated flow rate display unit 156.

The CPU 154 and the kerosene tank 8 on each floor
0 means exchange of various signals such as electric signals related to flow rate such as integrated flow rate.

Now, as shown in FIG. 1, by operating the pump device 14, the common kerosene tank 12
The kerosene is sucked from the kerosene and supplied to the kerosene tanks 80 on the lower floors via the common piping 71 for the lower floors (1 in the figure).
Although only one floor is shown, the number of floors belonging to lower floors is 2
Or more). Kerosene is supplied from the kerosene tank 80 of each floor to the kerosene combustion equipment 82 of each kerosene consumer via the pipe 74 of the floor, the flow meter 81 of each kerosene consumer, and the pipe 75 of each kerosene consumer. . Also, the pump device 1
By operating No. 5, kerosene is sucked from the shared kerosene tank 12, and the kerosene is supplied to each floor kerosene tank on the higher floors via the common pipe 72 for the higher floors. Although not shown, the kerosene is supplied to the kerosene burning equipment of each kerosene consumer in the high floor as well as in the low floor. The number of floors belonging to the higher floors may be two or more. The kerosene that overflows on each living floor passes through the return pipe 73 and the shared kerosene tank 1
It is recovered to 2.

The centralized meter reading board 16 is arranged in, for example, a manager's room, and intensively measures the kerosene consumption of each kerosene consumer detected by the flow meters 81 of all the consumers. Centralized meter reading board 1
6 and each consumer flowmeter 81 are connected by signal wiring via each floor kerosene tank 80.

FIG. 9 is a block diagram showing a control system of a kerosene centralized supply system using the kerosene supply pump devices 14 and 15 as described above. The control device 90 is a main CPU 91.
By this, the operation of the pump devices 14 and 15 is controlled. The operation of the main CPU 91 will be described below.

First, in the normal kerosene use state, the solenoid valve V1 and the emergency manual cock EC1 attached to the pipe between the kerosene tank 12 and the pump devices 14 and 15 are both open, and the pump device 14 and The solenoid valves V2 and V3 attached to the pipes arranged in parallel to 15 are both closed, and the solenoid valve V4 between each common pipe 71, 72 and each floor kerosene tank 80 is closed, and each floor kerosene is closed. The emergency manual cock EC2 between the tank 80 and each consumer flow meter 81 is open, and the solenoid valve V5 between each consumer flow meter 81 and the kerosene combustion device 82 is open.

With kerosene consumption at each kerosene consumer home,
When the oil level in each floor kerosene tank 80 decreases and eventually reaches the allowable minimum level, the detection signal is input to the main CPU 91 via the signal line and the centralized meter reading board 16. Based on this signal input, the main CPU 91 opens the electromagnetic valve V4 of the floor related to the signal input, drives either of the electromagnetic pumps 14a and 14b when the floor is the lower floor, and the floor is the higher floor. In case of electromagnetic pumps 15a, 15
By driving either b, the kerosene in the shared kerosene tank 12 is replenished to each floor kerosene tank 80 of the floor related to the signal input. Eventually, when the oil level in each floor kerosene tank 80 rises and reaches the maximum allowable level, the detection signal is input to the main CPU 91 via a signal line. Based on this signal input, the main CPU 91 causes the electromagnetic pump 1 to
Driving of 4a, 14b; 15a, 15b is stopped, and the solenoid valve V4 of the floor related to the signal input is closed.

When the above kerosene tank replenishment requests to the respective kerosene tanks 80 simultaneously occur for a plurality of living floors belonging to either the lower floors or the higher floors, both the electromagnetic pumps 14a and 14b or the electromagnetic pumps may be used. 15a, 15
By driving both b at the same time, kerosene replenishment for one living floor can be quickly completed, and subsequently kerosene replenishment for another living floor can be executed.

On the other hand, the kerosene replenishment to each floor kerosene tank 80 as described above can be executed in parallel for a plurality of living floors. Also in this case, the electromagnetic pumps 14a and 14b
Both of them or both of the electromagnetic pumps 15a and 15b can be simultaneously driven. Then, after the kerosene supply for all the living floors is completed, the driving of all the electromagnetic pumps is stopped.

The amount of kerosene replenished to each floor kerosene tank 80 as described above is the amount corresponding to the difference between the allowable minimum level and the maximum allowable level of each floor kerosene tank 80. However, when kerosene is consumed at the living floor when kerosene is replenished, the consumption amount is added. Since the main CPU 91 can grasp the kerosene consumption amount during kerosene replenishment, the control device 90 can add up the amount and store it as one kerosene replenishment amount.

As described above, since a relatively small capacity kerosene tank 80 is arranged for each living floor, the kerosene remaining amount is detected, and kerosene is replenished each time it reaches the allowable minimum, kerosene is used. Although the number of times of replenishment becomes more frequent than in the past, it is not necessary to replenish a large amount of kerosene at one time.
As MPd and MPd ′, there is an advantage that it is possible to use a relatively small capacity, and a combination of a plurality of pump units is used appropriately, and a pump unit that is driven according to the number of living floors to be supplied simultaneously A method of appropriately setting the number is possible.

Further, in the present embodiment, since it is not necessary to install a relatively large roof tank, it is possible to prevent kerosene leakage which frequently occurs in the roof tank and its surroundings.

[0086]

As described above, according to the pump device of the present invention, a pump in which a suction electromagnetic pump and a lifting electromagnetic pump are connected in series so that the lifting electromagnetic pump is on the downstream side. Since at least one unit is used, it is possible to efficiently supply kerosene or other fluid with a small and simple structure. In particular, by driving the suction electromagnetic pump and the push-up electromagnetic pump of the pump unit so that their suction and discharge are in the same phase, a larger flow rate at high pressure is possible, and it is desirable to use the electromagnetic pump. The fluid can be supplied to a high place at a flow rate.

Further, in the kerosene centralized supply system of the present invention, since the pump device as described above is used, kerosene is supplied from the common kerosene tank to each floor kerosene tank without providing a rooftop tank in the apartment house. This eliminates the need for piping to the roof tank and then to each floor, reducing the possibility of damaging equipment such as piping and tanks used in the kerosene supply system, and preventing kerosene leakage from the kerosene supply system. The possibility is reduced and the safety of the system can be improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a schematic configuration of a kerosene centralized supply system according to the present invention.

FIG. 2 is a schematic diagram showing a configuration of a pump unit.

FIG. 3 is a vertical sectional view showing an example of the structure of a suction electromagnetic pump.

FIG. 4 is a vertical sectional view showing an example of the structure of an electromagnetic pump for pushing up.

FIG. 5 is a vertical cross-sectional view showing an example of the structure of an electromagnetic pump for lifting.

6 is a cross-sectional view of FIG.

FIG. 7 is a configuration diagram of a measuring device used in an experiment.

FIG. 8 is a schematic diagram showing a flow rate detection system of a consumer flow meter.

FIG. 9 is a block diagram showing a control system of a kerosene centralized supply system.

[Explanation of symbols]

12 Common Kerosene Tank 14 Low-rise Floor Pump Device 14a, 14b, 14c, 14d Low-rise Floor Pump Unit 15 High-rise Floor Pump Device 15a, 15b, 15c, 15d High-rise Floor Pump Unit 16 Centralized Metering Board MPs Suction Electromagnetic Pump MPd , MPd 'Push-up electromagnetic pump 20, 20' Core member 21 Electromagnetic coil 22 Tube column 23 Lower magnetic path member 24 Upper magnetic path member 25 Plunger 26 Check valve (discharge valve) 27 Return coil spring 28 Auxiliary coil spring 29 Suction side joint 30 Check valve (suction valve) 31 Discharge side joint 32 Check valve 33 Casing 40, 40 'Core member 41 Electromagnetic coil 42 Tube column 43 Lower magnetic path member 44 Upper magnetic path member 45 Plunger 46 Check valve (discharge valve) 47 Return coil spring 48 Auxiliary coil spring 49 Suction side joint 50 Check valve (suction valve) 51 Discharge side joint 5 Check valve 53 Casing 54 Cylinder 55 Piston 56 Air bleeding valve 57 Accumulator 61 Through hole member 62 Main body member 64 Check valve (suction valve) 65 Check valve (discharge valve) X, Y, Z, W Area 66 inside pump Relief valve 67 Accumulator 68 Return path 71 Common piping for lower floors 72 Common piping for higher floors 73 Return piping 74 Piping for each floor 75 Customer piping 80 Kerosene tank for each floor 81 Flow meter 81 82 Kerosene combustion equipment 90 Control device 91 Main CPU 102 Flow passage Member 103 Fluid flow passage 104 Flow rate detection unit 106 Fluid temperature detection unit 122 Flow rate detection section 122 'Fluid temperature detection sections 124, 124' Fin plate 140 Bridge circuit (detection circuit) 141 Flow rate detection thin film temperature sensor 141 'Temperature compensation Thin film temperature sensor 143,44 Resistor 146 Differential amplification / integration circuit 14 Thin film heating element 150 transistors V1, V2, V3, V4, V5 solenoid valve EC1, EC2 emergency manual cock

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F04B 9/00 F04B 9/00 A 17/04 17/04 23/06 23/06 F23K 5/04 F23K 5 / 04 C 5/06 5/06 (72) Inventor Kiyoshi Yamagishi 1333-2 Ageo-shi, Saitama Prefecture Mitsui Mining & Smelting Co., Ltd. (72) Inventor Toshimi Nakamura 1333-2 Ageo-shi, Saitama Prefecture Mitsui Metals Mining Industry Co., Ltd. Research Institute (72) Inventor Toshiaki Kawanishi 1333-2 Hara-shi, Ageo-shi, Saitama Mitsui Mining & Smelting Co., Ltd. Research Institute (72) Inventor Kazunori Sugashima 5-23-13 Ikegami, Ota-ku, Tokyo Taisan Kogyo Co., Ltd. (72) Inventor Tsuneka Toyoshima 5-23-13 Ikegami, Ota-ku, Tokyo Taisan Kogyo Co., Ltd. (72) Isao Saito 5-23-13 Ikegami, Ota-ku, Tokyo Industry and Industry Stock Association In-house (72) Inventor Yasunori Chiba 5-23-13 Ikegami, Ota-ku, Tokyo Taisan Kogyo Co., Ltd. (72) Kenji Igarashi 5-23-13 Ikegami, Ota-ku, Tokyo Taisan Kogyo Co., Ltd. In-house F-term (Reference) 3E083 AA03 AB16 AC02 AC16 AE04 AE06 AE11 AJ02 AJ05 AJ08 AJ10 3H069 AA06 BB02 BB09 CC04 DD41 DD42 EE02 EE05 3H071 AA09 BB01 BB01 BB01 BB01 BB13 BB01 BB01 BB01 BB01 BB03 BB03 CC02 EA01

Claims (16)

[Claims] 1. At least one pump unit comprising a suction electromagnetic pump and a lifting electromagnetic pump connected in series so that the lifting electromagnetic pump is located on the downstream side, the suction electromagnetic pump comprising: The electromagnetic pump and the electromagnetic coil of the lifting electromagnetic pump are provided with a current supply circuit that supplies intermittent driving current to the electromagnetic coil. The suction electromagnetic pump applies a force in a first direction to the plunger by energizing the electromagnetic coil. The suction and discharge are executed together with the plunger position displacement operation by applying the action, and the force of the second direction opposite to the first direction is applied to the plunger by the return spring when the energization of the electromagnetic coil is canceled. By doing so, the plunger position restoration operation is executed, and the electromagnetic pump for pushing up is operated by energizing the electromagnetic coil. A plunger position displacement operation is executed by applying a force in the third direction to the plunger, and a return spring causes the plunger to move in a fourth direction opposite to the third direction as the electromagnetic coil is de-energized. A pump device in which suction and discharge are performed together with a plunger position restoring operation by applying a force. 2. The pump device according to claim 1, wherein a plurality of the pump units are connected in parallel. 3. The pump device according to claim 2, wherein at least one of the pump units is a spare unit having a configuration equivalent to that of at least one of the other pump units. 4. The current supply circuit drives the suction electromagnetic pump and the push-up electromagnetic pump in each of the pump units such that their suction and discharge are in the same phase. Claims 1-2
The pump device according to any one of 1. 5. The current supply circuit drives the suction electromagnetic pump and the push-up electromagnetic pump in all of the pump units such that their suction and discharge are in the same phase. The pump device according to claim 4. 6. The push-up electromagnetic pump includes a check valve arranged in a flow passage downstream of the discharge valve, and is connected to a flow passage between the check valve and the discharge valve. The pump device according to claim 1, further comprising an air bleeding valve. 7. The electromagnetic pump for sucking up and at least one of the electromagnetic pumps for pushing up are equipped with an accumulator connected to a flow path downstream of a discharge valve. 6. The pump device according to any one of 6. 8. At least one of the push-up electromagnetic pumps comprises a piston that moves together with the plunger, a cylinder to which the piston fits, and an interior of the cylinder through a flow passage formed in the piston. The check device according to any one of claims 1 to 7, further comprising a check valve that allows passage of fluid from the outside to the outside. 9. At least one of the push-up electromagnetic pumps comprises: a piston that moves together with the plunger; a cylinder to which the piston fits; 9. A first area, which is allowed to flow in a specific direction, and a second area, which is located outside the cylinder and communicates with the first area. The pump device according to any one of 1. 10. A kerosene centralized supply system for supplying kerosene from a common kerosene tank to a plurality of kerosene consumers on a plurality of floors by the pump device according to claim 1 through a kerosene supply pipe. 11. The pump device and the kerosene supply pipe are separately prepared for the low-rise floor and the high-rise floor, and the low-rise floor pump device serves as the lifting electromagnetic pump having a relatively large flow rate and small pressure. 11. The kerosene concentration according to claim 10, wherein the pump device for the upper floors uses a pump having a relatively small flow rate and a large pressure as the lifting electromagnetic pump. Supply system. 12. The electromagnetic pump for pushing up of the pump device for lower floors comprises: a piston that moves together with the plunger; a cylinder to which the piston fits; and a cylinder through a flow passage formed in the piston. A check valve that allows passage of fluid from the inside to the outside of the pump, and the electromagnetic pump for pushing up of the pump device for the upper floors has a piston that moves together with the plunger, and a cylinder to which the piston fits. A first region communicating with the inside of the cylinder and allowing the fluid to flow in a specific direction by the intake valve and the discharge valve; and a second region communicating with the first region and located outside the cylinder. The kerosene centralized supply system according to claim 11, further comprising: 13. The kerosene supply pipe has a common pipe and floor pipes connected to the common pipe, respectively, and the common pipe is connected to the shared kerosene tank via the pump. Each floor pipe is connected to each indoor pipe of the kerosene consumer via a consumer flow meter, and each floor kerosene tank is interposed between the common pipe and each floor pipe. Claims 10 to 1
The kerosene centralized supply system according to any one of 2. 14. The kerosene centralized supply system according to claim 13, further comprising a return pipe for collecting overflow kerosene from each floor kerosene tank to the shared kerosene tank. 15. A control device for controlling the operation of the pump device is provided, and a monitor signal of the amount of kerosene stored in each of the floor kerosene tanks is input to the control device, and the control device receives the monitor signal. The kerosene centralized supply system according to any one of claims 13 to 14, wherein the pump device is operated based on the above. 16. The kerosene centralized supply system according to claim 13, wherein the detected flow rate signal of the consumer flow meter is input to a centralized meter reading board through each of the floor kerosene tanks. .