JPH0616309U - Pneumatic circuit of suction car - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the dust collection capability in the air circuit of a suction wheel. [Structure] The first port P ₁ of the four-way switching valve V is connected to the receiver tank 1 of the suction wheel via the cyclone 6, and the second port P ₂ is connected to the suction port of the vacuum pump 5 via the first gas-liquid separator 7. 5a, the third port P ₃ is connected to the discharge port 5b of the vacuum pump 5 through the second gas-liquid separator 9, and the fourth port P ₄ is connected to the atmosphere opening port 8. When decompressing the inside of the receiver tank 1, the air sucked from the receiver tank 1 is cyclone 6, 4-way switching valve V, first gas-liquid separator 7, vacuum pump 5, second gas-liquid separator 9, 4-way It is released to the atmosphere through the switching valve V and the atmosphere opening port 8. By providing the two gas-liquid separators 7 and 9, dust and water droplets in the air are reliably collected, and clean air can be released to the atmosphere.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pneumatic circuit of a suction vehicle that sucks industrial waste into a receiver tank with a vacuum pump.

[0002]

[Prior art]

 A conventional suction truck has a cyclone and a gas-liquid separator in its pneumatic circuit to remove dust and water droplets contained in the air sucked together with industrial waste such as sludge. Cyclones were used to collect relatively large dust particles, and gas-liquid separators were used to collect fine dust particles and water droplets.

[0003]

[Problems to be solved by the device]

 By the way, recent suction wheels with improved suction capacity tend to lack the collection capacity of the gas-liquid separator, making it difficult to sufficiently collect dust and water droplets contained in the air. It was

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the dust and water drop collecting ability of the pneumatic circuit of the suction wheel.

[0005]

[Means for Solving the Problems]

 To achieve the above object, the present invention comprises a receiver tank, a cyclone, a vacuum pump and a four-way switching valve, and by switching the four-way switching valve to at least two positions, the suction port of the vacuum pump. Is connected to the receiver tank via a cyclone and the discharge port is open to the atmosphere, and the suction port of the vacuum pump is opened to the atmosphere and the discharge port is connected to the receiver tank via the cyclone. In the pneumatic circuit of the suction wheel that can select the pressure state, the first gas-liquid separator is provided in the pipe line connecting the 4-way switching valve and the suction port of the vacuum pump, and the 4-way switching valve and the discharge port of the vacuum pump. The first feature is that a second gas-liquid separator is provided in a pipe line connecting with.

In addition to the above-mentioned first characteristic, the present invention is characterized in that a net bag filled with a separator for collecting water droplets containing dust is stored inside the first and second gas-liquid separators. The second characteristic.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, in a receiver tank 1 mounted on a suction vehicle, a suction valve 2 for sucking sludge together with waste water and air, a discharge valve 3 for discharging the sucked waste water, A float valve 4 is provided which closes when the receiver tank 1 is full. A vacuum pump 5 for pressurizing or sucking the inside of the receiver tank 1 is provided with a suction port 5a and a discharge port 5b, and these suction port 5a and discharge port 5b are selectively connected to the receiver tank 1 via a four-way switching valve V. Connected to. That is, the four-way switching valve V includes four ports P ₁ to P _4, the first port P ₁ to the receiver tank 1 and via the cyclone 6 and the first pipe line L _1, the second port P ₂ is Through the second conduit L ₂ having the first gas-liquid separator 7, to the suction port 5a of the vacuum pump 5, the third port P ₃ to the atmosphere opening port 8 and the fourth port P ₄ to the second gas-liquid separation. It is connected to the discharge port 5b of the vacuum pump 5 via a third conduit L ₃ having a container 9. Further, the second gas-liquid separator 9 and the vacuum pump 5 are connected via a fourth pipe line L ₄ for supplying sealing water to the vacuum pump 5.

The four-way switching valve V is equipped with a rotatable valve body 10, and when the valve body is in the suction position shown in FIG. 3, the inside of the receiver tank 1 has a first pipe line L ₁ and a cyclone 6 , The first port P ₁ , the second port P ₂ , and the second conduit L ₂ having the first gas-liquid separator 7 to communicate with the suction port 5a of the vacuum pump 5 and the discharge port 5b of the vacuum pump 5 is It communicates with the atmosphere through the third conduit L ₃ having the second gas-liquid separator 9, the fourth port P ₄ , the third port P ₃ and the atmosphere opening port 8. On the other hand, when the valve body 10 of the four-way switching valve V is in the pressurizing position shown in FIG. 4, the atmosphere opening port 8 has the third port P ₃ , the second port P ₂ and the first gas-liquid separator 7. communicates with the suction port 5a of the vacuum pump 5 through the second pipe line L _2, the discharge port 5b third conduit L ₃ having a second gas-liquid separator 9 of the vacuum pump 5, the fourth port P ₄ , The first port P ₁ , the cyclone 6 and the first conduit L ₁ to communicate with the receiver tank 1.

A bunker 6 a provided under the cyclone 6 is provided with an opening / closing valve 11 for sucking air and an opening / closing valve 12 for draining water, and a fifth pipeline having an opening / closing valve 13 interposed. It is connected to the receiver tank 1 via L ₅ .

Next, the structure of the first gas-liquid separator 7 will be described with reference to FIGS. 5 to 9.

The first gas-liquid separator 7 includes a tank-shaped separator body 21 which is integrally formed by joining a cylinder 21a having an axis extending vertically and a cylinder 21b having an axis extending horizontally. And a hatch 22 that covers the upper end of the cylindrical body 21a so as to be openable and closable. An inlet opening 23 to which the second conduit L ₂ is connected is formed at one end of the tubular body 21b of the separator body 21, and the air flowing from the inlet opening 23 is blocked at the other end of the tubular body 21b. A partition wall 24 is formed at the position. A rubber plate 25 is fixed to the lower part of the partition wall 24 so as to be close to the water surface of the water accumulated at the bottom of the separator body 21. A punching metal 26 formed by punching a large number of small holes in a metal plate is stretched under the cylindrical body 21a, and a collecting chamber 27 is formed above the punching metal 26.

As is apparent from FIG. 8, the bracket 22 ₁ provided on the hatch 22 of the first gas-liquid separator 7 is rotated left and right on the hinge shaft 28 fixed to the bracket 21 ₁ provided on the separator body 21. It is slidably supported up and down. A spring 29 is contracted to the hinge shaft 28, and the elastic force of the spring 29 urges the hatch 22 upward along the hinge shaft 28.

As is clear from FIG. 9, a bolt 31 is pivotally supported by a plurality of brackets 21 ₂ provided on the separator main body 21 via pins 30, and the brackets 22 provided on the hatch 22 have the bolts 31. _The hatch 22 is pressed against the seal member 34 provided in the separator main body 21 by fitting the nut 33 with the ring 32 into the U-shaped hole 22 ₃ of ₂ and screwing it in. When opening and closing the hatch 22 for maintenance, when the bolt 31 loosen the nut 33 is disengaged from the U-shaped hole 22 ₃ outwardly, since the hatch 22 is lifted along the hinge axis 28 with bullet Hatsuryoku spring 29 The hatch 22 can be opened and closed by rotating the hatch 22 with a small force around the hinge shaft 29.

The hatch 22 is formed with an outlet opening 35 to which the second pipe line L ₂ is connected, and a large number of rods 36 are installed in a cage shape in a portion facing the collection chamber 27. A mesh bag B containing a large number of separators S shown in FIG. 13 is disposed between the bar 36 and the punching metal 26 so as to be located inside the collecting chamber 27. The separator S has a complicated shape with a large surface area, and collects water droplets that come into contact with it together with dust. The rod 36 functions so that the net bag B 1 blown up by wind pressure does not block the outlet opening 35.

In the figure, reference numeral 37 is a maintenance door, reference numeral 38 is a water supply port, reference numeral 39 is a water drain port, and reference numeral 40 is an inspection window.

Next, the structure of the second gas-liquid separator 9 will be described with reference to FIGS. 10 to 12.

The second gas-liquid separator 9 includes a separator main body 41 formed of a cylindrical body having an axis line extending in the vertical direction, and a hatch 42 that covers the upper end of the separator main body 41 so as to be openable and closable. The hatch 42 has the same structure as that of the hatch 22 of the first gas-liquid separator 7 described above. The bracket 42 ₁ provided on the hatch 42 and the bracket 41 ₁ provided on the separator body 41 connect the spring 43 to each other. It is supported via an interposed hinge shaft 44 so that the opening / closing operation can be easily performed. Further, the fixing structure of the hatch 42 is also the same as that of the first gas-liquid separator 7 described above, and thus the duplicate description will be omitted.

A separation cylinder 46 that opens downward is connected to the tip of an inlet opening 45 that horizontally penetrates the side surface of the separator body 41, and a punching metal 47 and a hatch 42 that are provided above the separation cylinder 46. The collecting chamber 48 is formed between the collecting chamber 48 and the bar 49 provided on the. A net bag B containing a large number of separators S is disposed inside the collection chamber 48.

In the figure, reference numeral 50 is an outlet opening, reference numeral 51 is a maintenance door, reference numeral 52 is a water supply port, reference numeral 53 is a water drain port, and reference numeral 54 is a conduit L connected to the vacuum pump 5. _Four Is the connection port of.

Next, the operation of the embodiment of the present invention having the above configuration will be described.

In order to suck the sludge into the receiver tank 1, as shown in FIG. 3, with the suction valve 2 of the receiver tank 1 opened and the discharge valve 3 closed, the four-way switching valve is moved to the suction position. The vacuum pump 5 is switched to operate. As a result, the inside of the receiver tank 1 has the float valve 4 and the first conduit L.₁, Cyclone 6, first port P₁, The second port P₂And a second pipeline L having a first gas-liquid separator 7₂Is connected to the suction port 5a of the vacuum pump 5 through the suction port, and sludge, waste water, and air are sucked into the inside of the depressurized receiver tank 1 through the suction valve 2. At this time, when the inside of the receiver tank 1 becomes full, the float valve 4 is closed and the first pipeline L₁Is blocked. On the other hand, the air discharged from the discharge port 5b of the vacuum pump 5 is the third pipe line L having the second gas-liquid separator 9. ₃ , 4th port P_FourAnd the third port P₃It is discharged to the atmosphere from the atmosphere opening port 8 via.

At the time of suction of the receiver tank 1, relatively large dust contained in the air sucked from the receiver tank 1 into the first pipeline L ₁ is collected by the cyclone 6 and provided below the cyclone 6. It is stored in the bunker 6a. Dust in the bunker 6a, by opening the on-off valve 11 and the on-off valve 13 provided in the fifth conduit L ₅ to be connected to the receiver tank 1 communicates with the atmosphere, through the fifth conduit L ₅ Are collected in the receiver tank 1.

The air that has passed through the cyclone 6 and the four-way switching valve V reaches the first gas-liquid separator 7 provided in the second pipeline L ₂ , and flows into the inside of the separator body 21 from the inlet opening 23 thereof. The air that has flowed into the separator main body 21 first collides with the partition wall 24 and the rubber plate 25 and is redirected downward to generate splashes in the water accumulated at the bottom of the separator main body 21. As a result, fine dust and water droplets that could not be collected by the cyclone 6 come into contact with the droplets and are collected.

After that, the air turns upward, passes through the punching metal 26, and flows into the collection chamber 27. A net bag B having a large number of separators S packed therein is housed in the collection chamber 27, and when the air comes into contact with the large number of separators S having a complicated surface shape, fine air bubbles remaining in the air are collected. Dust is collected together with water drops and falls to the water surface below. The air purified in this way is supplied from the outlet opening 35 provided in the hatch 22 to the suction port 5a of the vacuum pump 5 via the second pipeline L ₂ . The maintenance of the separator S can be easily performed by rotating the hatch 22 around the hinge shaft 29 and taking out the mesh bag B to the outside.

The air that has reached the second gas-liquid separator 9 provided in the third conduit L ₃ from the discharge port 5b of the vacuum pump 5 flows into the inside of the separator body 41 from the inlet opening 45 thereof. The air that has flowed into the separator main body 41 collides with the separation cylinder 46 and is diverted downward to generate splashes in the water that has accumulated at the bottom of the separator main body 41, whereby the first gas-liquid separation is performed. Fine dust and water droplets that could not be collected by the vessel 7 are collected.

After that, the air that has passed through the punched Meg metal 47 and flowed into the collection chamber 48 comes into contact with a large number of separators S housed inside the net bag B there, and the first gas-liquid separator 7 As in the case, the fine dust remaining in the air is collected together with the water droplets and falls to the water surface below. Then, the purified air is discharged from the outlet opening 50 provided in the hatch 42 to the atmosphere through the third conduit L ₃ , the fourth port P ₄ , the third port P ₃ and the atmosphere opening port 8.

The air containing dust and water droplets sucked from the receiver tank 1 is purified by the cyclone 6 and the first and second gas-liquid separators 7 and 9 in three stages, so that it is released to the atmosphere. The air taken can be very clean.

On the other hand, in order to discharge the dirty water from the receiver tank 1, as shown in FIG. 4, the four-way switching valve V is opened with the suction valve 2 of the receiver tank 1 closed and the discharge valve 3 opened. The vacuum pump 5 is operated by switching to the pressurizing position. As a result, the air sucked from the atmosphere opening port 8 passes through the third port P ₃ , the second port P ₂ and the second pipe line L ₂ having the first gas-liquid separator 7 and the suction port 5a of the vacuum pump 5. Through the third conduit having the second gas-liquid separator 9, the fourth port P ₄ , the first port P ₁ , the cyclone 6, the first conduit L ₁ and the float valve 4. It is supplied to the receiver tank 1. As a result, sewage is discharged from the pressurized receiver tank 1 via the discharge valve 3.

Even in the pressurized state, the first gas-liquid separator 7 and the second gas-liquid separator 9 function in the same manner as described above to collect dust and water droplets in the air. However, the cyclone 6 does not function because the air inflow direction is reversed.

Since the first and second gas-liquid separators 7 and 9 are provided in addition to the cyclone 6 in the pneumatic circuit of the suction wheel, the ability to collect dust and water droplets in the air is improved. It can be greatly improved.

Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment, and various design changes can be made.

[0033]

[Effect of device]

 As described above, according to the first feature of the present invention, the first gas-liquid separator is provided in the conduit connecting the four-way switching valve and the suction port of the vacuum pump, and the four-way switching valve and the vacuum pump are discharged. Since the second gas-liquid separator is provided in the pipe connecting the outlet, it is possible to reliably collect and clean the dust and water droplets contained in the air with the two gas-liquid separators.

According to the second feature of the present invention, the first and second gas-liquid separators each have a net bag filled with a separator for collecting dust together with water droplets, so that the dust supplementary Not only will it be possible to greatly improve the collection capability, but the separators can be easily maintained collectively by removing the mesh bag from the gas-liquid separator.

[Brief description of drawings]

[Figure 1] Overall side view of the suction wheel

FIG. 2 is a two-direction arrow view of FIG.

[Fig. 3] Pneumatic circuit diagram of suction wheel (suction state)

[Fig. 4] Pneumatic circuit diagram of suction wheel (pressurized state)

FIG. 5 is an overall front view of a first gas-liquid separator.

6 is a sectional view taken along line 6-6 of FIG.

7 is a view in the direction of arrow 7 in FIG. 6;

8 is a sectional view taken along line 8-8 of FIG.

9 is a sectional view taken along line 9-9 of FIG.

FIG. 10 is an overall top view of a second gas-liquid separator.

11 is a cross-sectional view taken along line 11-11 of FIG.

FIG. 12 is a view from the direction of arrow 12 in FIG.

FIG. 13 is a perspective view of a separator.

[Explanation of symbols]

1 Receiver Tank 5 Vacuum Pump 5a Suction Port 5b Discharge Port 6 Cyclone 7 First Gas-Liquid Separator 9 Second Gas-Liquid Separator B Net Bag L ₂ Second Pipeline (Pipeline) L ₃ Third Pipeline (Pipeline) ) B mesh bag S separator V 4-way switching valve

Claims (2)

[Scope of utility model registration request] 1. A receiver tank (1), a cyclone (6), a vacuum pump (5) and a four-way switching valve (V) are provided, and by switching the four-way switching valve (V) to at least two positions, Vacuum pump (5) suction port (5
a) is the receiver tank (1) via the cyclone (6)
Connected to the suction port and the discharge port (5b) is opened to the atmosphere, and the suction port (5a) of the vacuum pump (5) is opened to the atmosphere and the discharge port (5b) is received via the cyclone (6). In a pneumatic circuit of a suction wheel capable of selecting a pressurized state connected to a tank (1), a four-way switching valve (V) and a suction port (a) of a vacuum pump (5)
DOO first gas-liquid separator (7) is provided on the conduit (L ₂₎ connecting a conduit connecting the four-way switching valve (V) and the discharge port of the vacuum pump (5) and (5b) (L ₃ ) Is provided with a second gas-liquid separator (9). 2. The first and second gas-liquid separators (7, 9)
Separator (S) that collects dust with water droplets inside the
The pneumatic circuit of the suction wheel according to claim 1, characterized in that a net bag (B) filled with is stored.