JPH0724638Y2 - Drain valve in barrel of pull-out pump with check valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to improvement of a submerged type pump, and more particularly, when a drainage valve is provided at the top of a pullout type submerged pump to pull up the pump from the barrel. The present invention relates to a liquid drain valve in a barrel of a pull-out pump with a check valve that opens the valve to discharge the liquid in the barrel in a short time and reduce the load on the lifting wire.

[Prior Art] Generally, various submerged type pumps are known as pumps used for discharging liquefied gas and the like in a storage tank. An example of this use will be described with reference to the overall conceptual diagram shown in FIG.

That is, in order to pump up the combustible liquefied gas from the storage tank 10, a pumping column (hereinafter referred to as barrel) 12 is laid from above the storage tank 10 in the storage tank, and a check valve is further installed in the barrel 12. Hoisting machine with attached submerged pump 14
It is hung by a wire 18 via 16 and installed on the inner bottom of the barrel 12.

And this submerged pump 14 is a pump repair,
For inspection and the like, a hoisting machine 16 such as a winch or hoist pulls it up via a wire 18.

[Problems to be solved by the invention] In this case, when pulling up the submerged type pump from the bottom of the column, the liquid is full in the barrel at the top of this pump immediately after it is stopped, and the liquid is drained over a long period of time by spontaneous falling. Or pulling the liquid without draining it, it must be pulled up against this hydraulic pressure, and an excessive load acts on the wire and the hoisting machine, and by repeating this, the life of the wire is extremely extended. This shortens the length of time and also causes the hoisting machine to burn out due to overloading, which poses a major safety management problem.If the wire is cut, the pump dropped in the barrel must be lifted from the bottom of the barrel. A lot of labor is required, and during this period, the pump operation is stopped for a long time, and there is a problem that the operation efficiency is significantly reduced.

Therefore, the purpose of the present invention is to install a liquid drain valve on the top of the pull-out type submerged pump, and at the time of pulling up the pump, open the valve through a lifting wire to discharge the liquid handled in the upper part of the barrel pump in a short time. (EN) It is possible to provide a liquid drain valve in a barrel of a pull-out type pump with a check valve, which is capable of reducing the load on the wire, extending its life, and greatly improving the safety of the pump pulling work.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the present invention, a motor portion is provided that is droopingly seated on a seating surface provided at the bottom of a pumping column and a handling liquid can flow through the inside of a casing. In a pull-out submerged pump with a check valve, which is composed of a pump part, a drain valve for elastically energizing and closing the valve element is provided at the top of the pump casing, and a pump lifting wire is attached to one end of the valve element. It is characterized in that the liquid to be handled in the pumping column is discharged by opening the liquid drain valve by moving the valve body against the biasing force while the wire is being wound.

[Operation] The drainage valve in the barrel of the pull-out type pump with check valve according to the present invention is equipped with a drainage valve at the top of the pull-out type submerged pump so that the wire can be wound by a hoist when pulling up the pump. The liquid drain valve can be opened through the valve to drain the liquid handled in the upper part of the pump in the barrel in a short time, and the load on the wire can be reduced to extend its life and improve the safety of pump extraction work. Can be greatly improved.

[Embodiment] Next, an embodiment of a liquid drain valve in a barrel of a pull-out pump with a check valve according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a partially enlarged cross-sectional view of a drain valve attached to the top of a pull-out type submerged pump, and FIG. 2 is an overall cross-sectional view of the pull-out type submerged pump.

In FIG. 2, reference numeral 14 indicates a submerged pump, which is composed of a pump section and a motor section (not shown), and the pump section is provided with a suction port 21 that communicates with a pump chamber provided with an impeller. And a plurality of discharge ports 23,
Each of them is provided with a check valve (not shown) which can flow only in the direction from the inside of the pump to the inside of the barrel.

The pump portion and the motor portion are surrounded by a pump casing 20 and a motor housing 22, and the upper portion of the motor housing 22 is closed by an end bell 24.

In addition, this pull-out submerged pump with check valve 14
When installed in the barrel 12, the outer edge corner portion 26 formed on the bottom portion of the pump casing 20 is joined to the seat surface 28 formed on the inner bottom portion of the barrel 12, and thus the outside is closed. Become.

On the other hand, a head plate 30 is attached to the top of the barrel 12, and the head plate 30 is provided with a terminal tube 34 for attaching a terminal box (not shown) which accommodates a cable 32 of a motor section (not shown). (See Figure 2).

Further, a lift bar 36 connected to the wire 18 for suspending the pull-out type submerged pump 14 is projectingly provided at the center of the head plate 30, and the lift bar 36 is supported by a guide support portion provided upright on the head plate 30. .

The tip of the lift bar 36 is connected to the hoisting machine 16 via the wire 18.

In this way, the pull-out submerged pump 14 installed on the bottom of the barrel is used for hoisting and hoisting machines 16 such as hoists for repairing and inspecting the pump periodically for repair and inspection. Be seen.

When pulling this pump 14, the barrel 12 above the pump 14
The liquid drain valve 40 of the present invention is provided in the upper portion of the end bell 24 in order to quickly discharge the liquid to be handled filled in the storage tank 10.

That is, this drain valve 40 is constructed as shown in FIG.

In the figure, the drain valve 40 is slidably supported by a cover plate 42 attached to the top of the end bell 24. The liquid drain valve 40 includes a head 54 having a hole for connecting a pulling wire in a portion protruding to the outside of the lid plate 42, and the head 54.
It is composed of a valve body 58 which is connected to the lower part of 54 and has a conical valve seat and a guide formed on the bottom part.

On the other hand, a bearing housing portion 444 that supports the upper bearing 43 is provided in the lower inside of the end bell 24, and a room 46 partitioned by a wall 48 is defined in the upper portion of the bearing housing portion 44, and the center of the wall 48 is defined. A valve seat 50 having a tapered upper peripheral edge is inserted into the formed through hole.

Then, the conical portion of the valve body 58 is joined to the valve seat 50, and at the same time, the valve seat 58 is elastically pressed and urged by the compression spring 60 so that the valve seat portion 50 is liquid-tightly closed to the outside. To be done.

Further, the wire 18 is locked in the hole provided in the head 54 portion of the liquid removal valve 40 via the metal fitting 62.

Therefore, this pull-out submerged pump with check valve 14
When the hoisting machine 16 is started and the wire 18 is pulled up by a predetermined amount at the time of pulling up, the valve body 58 rises against the compression spring 60, and the valve seat 50 is opened.

In this case, the pull-out submerged pump 14 is still located at the bottom of the barrel.

The opening of this drain valve 40 allows the abmerged pump
The handling liquid filled in the upper part of the barrel 12 of 14 easily flows within the pump through the opening of the check valve 40 and is returned to the tank 10 within a short time.

Then, when the liquid level in the barrel 12 reaches the same level as the liquid in the tank, nitrogen gas (N ₂ ) is further fed from the discharge pipe to return all the liquid in the barrel into the tank. Then, the hoisting machine 16 is started to wind the wire 18 and pull up the pull-out type submerged pump.

As a result, when the pump is pulled up, only the weight of the pump and its accessories acts on the lifting wire 18,
The load on the wire 18 is reduced, and the life and safety of the wire are significantly increased.

[Effects of the Invention] As is apparent from the above-described embodiments, the liquid drain valve in the barrel of the pull-out type pump with check valve according to the present invention can be pulled up by attaching the check valve to the top of the pull-out type submerged pump. Sometimes the liquid drain valve can be opened through the lifting wire to drain the liquid on the top of the pump in a short time, and the load on the wire can be reduced to extend its life and greatly improve the safety of pump lifting work. Can be improved.

In this way, by reducing the lifting load, the power consumption of the hoisting machine when hoisting the pump is reduced and the operating efficiency is significantly improved.

Although the preferred embodiments of the present invention have been described below, it is needless to say that the present invention is not limited to the embodiments of the present invention and various design changes can be made without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, a partially enlarged sectional view of a check valve attached to the top of a pull-out type submerged pump, and FIG. 2 is an overall cross-sectional view of the pull-out type submerged pump.
FIG. 3 is an overall conceptual diagram of a pull-out type submerged pump. 10 …… storage tank, 12 …… pumping column 14 …… submerged pump with check valve 16 …… hoisting machine, 18 …… wire 20 …… pump casing 21 …… suction port 22 …… motor housing 23 …… Discharge port, 24 …… End bell 26 …… Outer edge corner, 28 …… Seat surface 30 …… Head plate, 36 …… Lift bar 40 …… Liquid drain valve, 42 …… Lid plate 43 …… Upper bearing 44 …… Bearing Housing 46 …… Room, 48 …… Wall 50 …… Valve seat, 54 …… Head 58 …… Valve element, 60 …… Compression spring 62 …… Metal fitting

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Arai 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Yoshio Inoue 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Inventor Seiichi Uchino 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (56) Reference JP-A-1-177493 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A pull-out type submerged pump with a check valve, which is seated down on a seating surface provided at the bottom of a pumping column and is composed of a motor section and a pump section through which a handling liquid can flow through the inside of a casing, A liquid drain valve for elastically urging and closing the valve body is provided at the top of the pump casing, and a pump lifting wire is locked at one end of the valve body, and a valve that resists the urging force while the wire is being wound. A liquid drain valve in a barrel of a pull-out pump with a check valve, characterized in that the liquid handled in the pumping column is discharged by opening the liquid drain valve by moving the body.