JP2764688B2 - Gas pressure operated pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rolling mill scale,
Liquids containing or dispersed solids such as animal excrement, tungsten carbide slurry, fly ash, lathe waste, papermaking waste, etc., or simple liquids such as molten resin compounds, paints, etc. are automatically transferred from one storage tank to a plurality of storage tanks. The present invention relates to a pump that operates in a batch system at a gas pressure used in a case where the pump is dispersed in a production line.

[0002]

2. Description of the Related Art Conventionally, in the above technical fields,
Most of them use an electric motor using a rotating force or a stretching force, and electric energy is indispensable. In addition, it was necessary to prepare a complicated control circuit for the application.

[0003]

In the above prior art,
When using an electric motor, it can be said that in many cases the motor sound is bothersome and it is preferable to perform ON-OFF frequently, but for example, when the capacity is very large and operation is guaranteed around the clock, When transferring a liquid containing a solid or a precipitate, a conventional pump requires a troublesome treatment such as a system for removing the solid or the precipitate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to omit a complicated weighing operation to be performed at each time of an intermittent fixed-quantity transfer performed by a bogie or the like, and to perform fluid measurement. and a portion forming a flow path on a simple structure, and an object thereof is to provide a pressure operated pump there is no possibility of occurrence of a failure due to clogging or the like due to inclusion.

[0005]

The present invention SUMMARY OF THE INVENTION It is an object to <br/> resolve the problems described above, the summary is the inlet passage of the liquid product in the lower part of the storage tank of large capacity , An outflow (discharge) passage, a valve that opens and closes in accordance with the pressure difference in the liquid storage tank at the boundary surface with each liquid storage tank, and a diaphragm is used on the upper part outside the liquid storage tank. The details of a pump configured to store and drain liquid in a liquid storage tank in a batch operation by an air pressure control mechanism are as follows. The pressure-actuated pump according to the present invention includes a liquid storage tank that can be hermetically sealed, an inflow and a discharge side swing type check valve that communicates with the bottom surface of the liquid storage tank, and a liquid storage tank that penetrates the top of the liquid storage tank. An exhaust pipe having a normally open two-way valve at the top, and a first pressurization pipe having a normally closed two-way valve at the top that penetrates the top of the liquid storage tank and communicates with the first diaphragm chamber. And a second pressurizing conduit which also has a normally closed two-way valve at the top that penetrates through the top of the liquid storage tank and communicates with the second diaphragm chamber facing the first diaphragm chamber via the diaphragm. A throttle means for constantly supplying a very small amount of air to the second pressure line; a lever arm which is displaced in accordance with a pressure difference between the first and second diaphragm chambers; The normally open and normally closed two-way valves are opened and closed via the main valve, It is obtained by such a so done pilot valve to deliver pressurizing gas to a second pressurized pressure line, automatically deliver a certain amount of liquid in a batch operation.

[0006]

According to the present invention, since the drain pipe is formed so that the level of the drain liquid remaining after the previous drain is always higher than the lower end opening of the second pressurizing pipe, the residual drain liquid is formed. The check valve on the drain side is closed against the pressure at the time of flowing into the liquid storage tank due to the head pressure. When the inflow liquid level in the liquid storage tank rises and the lower end opening of the second pressurized conduit is immersed in the inflow liquid, the first and second diaphragm chambers lose pressure equilibrium and are connected to the diaphragm. The normally open, normally closed two-way valve is opened and closed by the operation of the main valve connected to the pilot valve operated by this displacement, and pressurizes the liquid level in the liquid storage tank. The check valve closes, and the check valve on the discharge side opens to drain water. According to the above operation, a fixed amount of liquid can be automatically fed in a batch operation without performing a measuring operation.

[0007]

FIG. 1 is a longitudinal sectional view showing the entire structure of a pressure-actuated pump according to an embodiment of the present invention, and FIG. 2 is an enlarged longitudinal sectional view showing an adjusting device 8 provided at the top. 1 and 2, reference numeral 1 denotes a liquid storage tank for temporarily storing an inflowing liquid, and is formed so as to be able to be hermetically closed according to the operation of a two-way valve described later. Reference numerals 2 and 3 denote swing-type check valves that rotate about hinges 2a and 3a provided at the upper ends thereof and open and close a flow path from left to right as viewed in the drawing. 4 inflow side pipe line, 5 has a head h ₁ discharge-side pipe line, 5a in drainage surface remaining. 6 is a normally open two-way valve 6a that penetrates into the top of the liquid storage tank 1 and is always open to the atmosphere at the top.
, A first pressurizing pipeline that penetrates through the top of the liquid storage tank 1 and connects to a first diaphragm chamber 8a and a normally closed two-way valve 8b provided in the adjusting device 8. Reference numeral 9 denotes a second pressurized conduit, one end of which passes through the top of the liquid storage tank 1 and has the above h _1.
H _1> h ₂ become an opening 9a at a predetermined position h _2, the other end stop means 9b and the second diaphragm chamber configured with supply flow path and comprising pores of constantly bleed gas against 8
c, Connect to the normally closed two-way valve 8d.

Reference numeral 8e denotes a diaphragm which is a partition between the first diaphragm chamber 8a and the second diaphragm chamber 8c.
Is a lever arm whose free end is displaced about the fulcrum in response to the movement of the diaphragm 8e, 10 is a pilot valve which is operated by the displacement of this lever arm 8f,
The normally open two-way valve 6a and the normally closed two-way valves 8b and 8d are opened and closed by being operated by being connected to a main valve having a delay operation and a reset operation function (not shown).

Next, the operation based on the above configuration will be described in the order of FIGS. FIG. 3 shows a state immediately after the operation starts,
Normally open two-way valve 6a is opened position, normally closed two-way valve 8b, 8d is a closed position, the head pressure h ₁ of the drainage surface 5a remaining on the previous drainage opening 9a of the second pressurizing pressure line 9 Since h ₁ > h ₂ with respect to the position h ₂ , the check valve 3 is kept closed against the head pressure h of the liquid flowing from the check valve 2. Also,
A small amount of gas is fed into the second pressure line 9 via a throttle means 9b (see FIG. 2) provided at the top, and is constantly discharged into the liquid storage tank 1 through the opening 9a. Further, the gas in the liquid storage tank 1 is discharged to the atmosphere via the exhaust pipe 6 and the normally open two-way valve 6a in accordance with the rise of the level of the flowing liquid.

Next, as shown in FIG. 4, when the liquid level in the liquid storage tank 1 rises and the opening 9a of the second pressure line 9 is immersed, the bleed air released from the opening 9a is released. Causes a bubble in the liquid, and the bleed resistance in the opening 9a increases, so that the pressure in the second pressurizing conduit 9 slightly increases. Due to the above change, a difference is generated between the pressure in the balanced first diaphragm chamber 8a and the pressure in the second diaphragm chamber 8c, and the diaphragm 8e is displaced toward the first diaphragm chamber 8a. The free end of the lever arm 8f moves to operate the pilot valve 10. By the operation of the pilot valve 10, a main valve (not shown) is operated, and the normally-open two-way valve 6a is set to the closed position, and the normally-closed two-way valves 8b, 8
When d is set to the open position, each open / close position is switched.

Next, the operation will be described with reference to FIG. 5 showing a state in which the process has proceeded to the pressurization / drainage stage through the above process. The normally open two-way valve 6a is in the closed position, and the normally closed two-way valve 8b, 8d is in the open position in the closed storage tank 1.
Since the pressurized gas is supplied to the pressurized pipe 7 and the second pressurized pipe 9, the liquid level in the liquid storage tank 1 into which the gas has flowed is pressurized,
The check valve 2 is closed by this pressurization, the check valve 3 is opened, and the inflow liquid in the liquid storage tank 1 is discharged to the outside through the discharge pipe 5.
During the above drainage process, the main valve (not shown) operated by the pilot valve 10 holds the predetermined delay time and performs a reset operation after the end of the drainage process.
3, the normally open two-way valve 6a, the normally closed two-way valves 8b and 8d, the diaphragm 8e, and the lever arm 8f all return to the same position as in FIG. 1 as shown in FIG. The bleed gas is released from the opening 9a of the second pressurizing pipe 9, and the gas in the liquid storage tank 1 is released to the atmosphere via the normally open two-way valve 6a. In the above,
As the gas, it goes without saying that a gas such as air, nitrogen gas or carbon dioxide gas can be selected and used according to the purpose of use. Further, it is not always necessary to design the liquid storage tank so that the liquid storage amount is full.

[0012]

As described above, according to the present invention, when the amount of liquid flowing into the liquid storage tank reaches a certain value, the bleed gas pressure in the second pressurizing line fluctuates. The pilot valve is actuated by the displacement of the lever arm caused by the loss of the pressure balance in the second diaphragm chamber, and furthermore, the operation of the main valve having the delay and reset operation functions by receiving the actuation of the pilot valve allows the normally open, A normally closed two-way valve is opened and closed to pressurize the liquid level in the storage tank and automatically discharge the liquid flowing into the storage tank to the outside. A large amount of liquid can be supplied in batch operation, and a simple check valve of swing type that operates only by the pressure difference between the upstream and downstream sides is used to open and close the flow path. Even if solids are mixed in the flow path, Mali, or there is an effect that it is possible to obtain a gas pressure operated pump without failure or the like of which may cause results of the component.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an entire configuration of a pressure-operated pump according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view showing a detailed configuration of the adjusting device in FIG.

FIG. 3 is an operation explanatory view showing a state in which a liquid starts flowing into a liquid storage tank.

FIG. 4 is an operation explanatory diagram showing a state where the liquid flowing into the liquid storage tank has reached a predetermined liquid level.

FIG. 5 is an operation explanatory view showing a state in which a liquid surface flowing into a liquid storage tank is pressurized and drained.

FIG. 6 is an operation explanatory diagram showing a state in which drainage has been completed and a check valve, a normally open / normally closed two-way valve, etc., have returned before the first operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage tank 2, 3 Check valve 6 Exhaust line 6a Normally open two-way valve 7 First pressurization line 8a First diaphragm chamber 8b, 8d Normally closed two-way valve 8c Second diaphragm chamber 8e Diaphragm 8f Lever arm 9 Second pressurizing line 9a Opening 9b Throttling means 10 Pilot valve

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 594016551 1000 North Halted Street, Chicago, Ill. S. A. C / oChica go Industrial Pump Company (58) Fields investigated (Int. Cl. ⁶ , DB name) F04B 43/06 F04B 41/02 F04B 49/00 311

Claims (1)

(57) [Claims] 1. A liquid storage tank formed so as to be sealable, a pair of check valves communicating with a bottom surface of the liquid storage tank to open and close a flow path on an inflow and a discharge side, and a top part of the liquid storage tank An exhaust pipe having a normally open two-way valve at the top and a normally closed two-way valve at the top penetrating the top of the liquid storage tank and communicating with the first diaphragm chamber. A pressure conduit, an opening provided at a lower end portion penetrating the top portion of the liquid storage tank, and a normally closed two-way valve provided at a top portion; and a second valve facing the first diaphragm chamber via a diaphragm. A second pressure line communicating with the second diaphragm chamber, a throttle means for constantly supplying a very small amount of air to the second pressure line, and a pressure difference between the first and second diaphragm chambers. A normally open, normally closed two-way valve that operates according to the displacement of the lever arm, And a pilot valve for opening and closing the pump.