KR101321976B1 - Diaphragm pump - Google Patents

Abstract

PURPOSE: A diaphragm pump with operational reliability is provided to resolve the inoperative state of a pump due to the delay of a spool by making the vertical movement of the spool which controls the flow of compressive air to be smooth using a single air control valve. CONSTITUTION: A diaphragm pump with operational reliability comprises a pump body (10), a shaft (20), a first diaphragm (30), a second diaphragm (40), and an air control valve (50). The pump body is formed with a discharge pipe (16), an absorption pipe (17), and an air outlet (18). The left and right sides of the pump body are formed with first and second working chambers (14, 15) which are separately connected to an inlet and an outlet. The shafts are installed on the left and right sides of the pump body to be moved. One and the other ends of the shaft stick out into the first and second working chambers. The first and second diaphragms are separately installed at one and the other ends of the shaft. The diaphragms separately partition the first working chamber into a first fluid chamber (14a) and a first air chamber (14b) and the second working chamber into a second air chamber (15b) and a second fluid chamber (15a). The air control valve is installed on the pump body. The air control valve includes a valve body (51) formed with an air inlet (51a) and a spool (52) installed inside the valve body to be vertically moved. The air control valve controls the flow of compressive air which flows into the first and second air chambers by being supplied through the air inlet.

Description

Diaphragm pump with guaranteed operating reliability {Diaphragm pump}

The present invention relates to a diaphragm pump that continuously inhales and discharges a fluid by causing a change in volume of an operating chamber by a diaphragm pulsating according to the flow of compressed air controlled by the movement of a spool constituting an air control valve. Specifically, the spool is controlled to control the flow of compressed air while moving up or down by the pressure of the compressed air, which ensures the operation reliability that allows the fluid to be smoothly pumped by completely eliminating the inoperable state caused by the spool congestion. It relates to a diaphragm pump.

In general, the diaphragm pump is a small-capacity metering pump that inhales and discharges a fluid by pulsating a pair of diaphragms using compressed air as a driving power. It is possible to pump various fluids by changing the material of the diaphragm, and to use it because of its small volume and light weight. Not only is this convenient, but also a self-sustaining operation that ensures stable use.

These diaphragm pumps are installed at both ends of the shaft which are movable to the left and right sides of the pump body, and the compressed air for entering and exiting the air chamber a pair of diaphragms partitioning the operation chambers provided at both sides of the pump body into the air chamber and the fluid chamber. By pulsating opposite to each other according to the flow of the fluid iteratively changes the volume of the fluid chamber by the fluid is sucked into the fluid chamber and discharged to the outside.

At this time, the flow of compressed air is controlled by an air control valve, which has a structure in which a spool is installed inside the valve body. And the movement of the spool is a structure that occurs naturally in the process of atmospheric pressure while communicating with the atmosphere under the action of compressed air.

That is, when the spool is located in the lower part of the inside of the valve body, the compressed air flows into the air chamber of the left operating chamber along the inlet flow path of the spool to increase the volume of the air chamber, and the left diaphragm is pressurized in the left direction to receive the right diaphragm and Together, they pulsate to the left along the shaft, and at the same time compressed air that has already flowed into the air chamber of the right operating chamber is discharged to the outside through the exhaust passage of the pump body along the outflow channel groove of the spool.

Therefore, the fluid already sucked into the fluid chamber of the left operating chamber is discharged to the outside through the discharge pipe, and the new fluid is sucked into the fluid chamber of the empty right operating chamber through the suction pipe.

When the shaft is completely moved to the left side, the upper space of the valve body communicates with the outside through the exhaust passage of the pump body, and the atmospheric pressure acts, and the compressed air introduced through the inflow passage groove of the spool is pumped through the inside of the spool. The spool rises again due to the pressure difference while being discharged to the exhaust passage of the body, and is positioned above the valve body.

Then, the compressed air flows into the air chamber of the right operating chamber along the inlet flow path of the spool, increasing the volume of the air chamber, and the right diaphragm is pressurized in the right direction, pulsating to the right along the shaft with the left diaphragm, and at the same time, operating the left side Compressed air that has already flowed into the air chamber of the chamber is discharged to the outside through the exhaust passage of the pump body along the flow path of the spool.

Accordingly, the fluid already sucked into the fluid chamber of the right operating chamber is discharged to the outside through the discharge pipe, and the new fluid is sucked into the fluid chamber of the empty left operating chamber through the suction pipe.

As the above state is repeated, the fluid is alternately sucked and discharged into the fluid chamber of the left operating chamber and the fluid chamber of the right operating chamber, thereby enabling continuous pumping of the fluid.

However, such a conventional diaphragm pump has a structure in which the up and down movement of the spool occurs in a low pressure state due to atmospheric pressure, and there is no structure that reliably interrupts the flow of compressed air on the outer circumferential surface of the spool.

Therefore, the compressed air leaks into the gap due to the tolerance between the spool and the valve body, and the atmospheric pressure does not work properly, and the vertical movement of the spool is not smooth, and the spool is stuck in a halfway position inside the valve body and becomes inoperable. Resulted.

To solve this problem, O-rings are installed on the outer circumferential surface of the spool to prevent the leakage of compressed air, and a pilot valve is installed to operate the high pressure by the compressed air in the upper and lower spaces of the spool while operating by the physical pressure of the diaphragm. Thus, a diaphragm pump for smoothly moving the spool up and down was devised.

However, in the conventional diaphragm pump, as the pilot valve is further installed, the overall structure of the pump is not only complicated, and as a result, there is a problem in that the cost of the product is high because more components are added and the number of times for assembling is increased.

In order to solve the problems of the conventional diaphragm pumps at once, there is an urgent need for the development of a diaphragm pump having an air control valve capable of smoothly moving up and down the spool without any additional configuration.

Korean Patent Publication No. 10-1291316, published July 24, 2013.

The present invention has been invented to solve the above problems, without the additional configuration of the pilot valve, the spool to smooth the vertical motion of the spool to control the flow of the compressed air pulsating the diaphragm with only one air control valve It is an object of the present invention to provide a diaphragm pump having a structure capable of eliminating an inoperable state due to operation reliability.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

The diaphragm pump to ensure the operation reliability according to the present invention for achieving the above object, the first operation is installed in the upper and lower discharge pipes and suction pipes respectively, the exhaust port communicating with the outside and connected to the suction pipe and discharge pipes respectively on the left and right sides; A pump body in which a seal and a second operation chamber are divided; A shaft installed to be movable to the left and right of the pump body and having one end and the other end protruding into the first operating chamber and the second operating chamber, respectively; A first diaphragm and a second diaphragm respectively installed at one end and the other end of the shaft to partition a first operation chamber into a first fluid chamber and a first air chamber, and a second operation chamber into a second air chamber and a second fluid chamber; And a valve body installed at the pump body and provided with an air inlet, and a spool installed to be able to flow up and down inside the valve body, which is supplied to the air inlet to enter and exit the first air chamber and the second air chamber. An air control valve for controlling the flow of compressed air, wherein the air control valve is configured to include a first air chamber when the first air chamber or the second air chamber is filled with compressed air and the shaft is completely moved to the right or left side. Compressed air in the air chamber or the second air chamber flows into the lower space or the upper space of the valve body through the first air outlet path or the second air outlet path, and moves the spool up or down while moving the spool up or down. Compressed air, which has already flowed into the upper or lower space of the valve body along with the compressed air of the seal, is discharged to the outside through the exhaust port, As the new compressed air enters the second air chamber or the first air chamber, the first diaphragm and the second diaphragm pulsate to the right or left along the shaft to suck the fluid into the first fluid chamber or the second fluid chamber and It is characterized in that the pumping of the fluid is made continuously while discharging the fluid already sucked into the chamber or the first fluid chamber.

The spool includes a first pressure space having an upper space inside the valve body, a second pressure space having a lower space, a first exhaust space for communicating the first air chamber and an exhaust port, and a second exhaust communication for communicating the second air chamber and the exhaust port. A plurality of protruding flanges are formed on the outer circumferential surface so as to be spaced up and down so as to be divided into a space and an inflow space for communicating the first and second air chambers with the air inlet, and the outer surface of the protruding flange is in close contact with the inner circumferential surface of the valve body. O-ring is installed to partition the spaces to be sealed.

The first air outlet passage and the second air outlet passage are provided between the shaft hole and the shaft into which the shaft is inserted, and are opened by the first opening and closing means and the second opening and closing means when the shaft is completely moved to the right and left sides. And the first air chamber and the second air chamber communicate with the inner lower space and the upper space of the valve body, respectively.

The first opening and closing means and the second opening and closing means, a pair of O-rings are provided at a predetermined interval on the left and right inner peripheral surface of the shaft hole, respectively; And grooves formed on the left and right inner circumferential surfaces of the shaft, respectively, when the shaft is completely moved to the right and left sides, the O-ring and the groove located at the outer side close to the second air chamber and the first air chamber are placed on the same line, and are formed in the gap formed therebetween. The second air chamber and the first air chamber are communicated with the first pressure space and the second pressure space of the valve body, respectively.

The exhaust port may include a first exhaust port for discharging the compressed air introduced into the first air chamber to the outside through the first exhaust space; A second exhaust port for discharging the compressed air introduced into the second air chamber to the outside through the second exhaust space; And a third exhaust mechanism for discharging the compressed air introduced into the first pressure space and the second pressure space of the valve body to the outside.

The outlet side of the first exhaust port and the second exhaust port are configured to communicate with each other, and the outlet side of the third exhaust port is configured not to communicate with the outlet side of the first exhaust port and the second exhaust port.

The first exhaust pipe and the second exhaust pipe are characterized in that the inner diameter is configured to gradually or gradually enlarged toward the exit.

According to the present invention,

First, as the movement of the spool is controlled by the pressure of compressed air rather than atmospheric pressure, the inoperable state caused by the spool's stagnation is eliminated, thereby reliably interrupting the flow of compressed air that pulsates the diaphragm, thereby allowing continuous pumping of the fluid smoothly. It is effective to ensure the operation reliability.

And, by controlling the movement of the spool only by compressed air without adding a separate pilot valve, there is an effect that the cost of the product can be lowered by reducing the parts, simple structure and easy assembly.

In addition, the compressed air for controlling the movement of the spool is discharged to the outside through the exhaust vent separate from the compressed air for pulsating the diaphragm, so that it is not affected by the icing phenomenon that occurs during the discharge of the compressed air for pulsating the diaphragm. The effect is to keep the movement normal.

1 is an operation diagram showing a state in which the fluid is sucked into the first fluid chamber of the diaphragm pump and the fluid is discharged from the second fluid chamber according to a preferred embodiment of the present invention.
2 is an operation diagram showing a state in which the fluid is sucked into the second fluid chamber of the diaphragm pump and the fluid is discharged from the first fluid chamber according to a preferred embodiment of the present invention.
3 is an enlarged view of a portion "A" in FIG.
4 is an enlarged view of a portion “B” of FIG. 1.

The diaphragm pump which guarantees the operation reliability according to the present invention is a small-capacity metering pump driven by the flow of compressed air, and is mainly provided in a ship to prepare for the inundation situation by water to prepare for the inundation situation of the ship by sea water. It is a pump used to.

In particular, the diaphragm pump which ensures the operation reliability according to the present invention, unlike the conventional diaphragm pump can not only eliminate the inoperable state caused by the stagnation of the spool to ensure the operation reliability but also one air control valve without a pilot valve It can be operated by itself, which reduces the unit cost.

This feature is achieved by a structure in which the spool constituting the air control valve controls the flow of compressed air entering and exiting the air chamber while lifting and lowering by the high pressure of the compressed air filled in the air chamber.

As a result, the spool is forced to move up and down by the high pressure of the compressed air, thereby reliably interrupting the flow of compressed air entering and leaving the air chamber, so that the pair of diaphragms can be pulsed smoothly and mutually opposite to pump the fluid continuously. .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an operation diagram showing a state in which the fluid is sucked into the first fluid chamber of the diaphragm pump and the fluid is discharged from the second fluid chamber according to a preferred embodiment of the present invention, Figure 2 is 3 is an operation diagram illustrating a state in which fluid is sucked into the second fluid chamber of the diaphragm pump and the fluid is discharged from the first fluid chamber according to the preferred embodiment, and FIG. 3 is an enlarged view of portion "A" of FIG. 4 is an enlarged view of a portion “B” of FIG. 1.

As shown in FIGS. 1 and 2, a diaphragm pump having a guaranteed operating reliability according to a preferred embodiment of the present invention includes a pump body 10, a shaft 20, a first diaphragm 30, and a second diaphragm ( 40), and an air control valve (50).

First, the pump body 10 is composed of a center block 11, which is the center, and side blocks 12 and 13 respectively installed on both sides of the center block 11, which is the overall form of the diaphragm pump. To construct.

Here, the first operation chamber 14 is partitioned inside the left side block 12, and the second operation chamber 15 is partitioned inside the right side block 13. Discharge pipes 16 and suction pipes 17 are provided above and below the side blocks 12 and 13, respectively.

That is, both ends of the discharge tube 16 communicate with upper sides of the first operation chamber 14 and the second operation chamber 15, respectively, and both ends of the suction tube 17 are connected to the first operation chamber 14 and the second operation chamber. It communicates with the lower side of (15), respectively. A discharge port 16a is formed in the middle of the discharge tube 16, and a suction port 17a is formed in the middle of the suction tube 17.

However, at the inlet side of the discharge tube 16, a check valve 16b is provided which is opened only in the direction discharged from the first operating chamber 14 and the second operating chamber 15 to the discharge tube 16, and the suction tube ( On the inlet side of 17), a check valve 17b is opened which opens only in the direction of suction from the suction pipe 17 to the first operating chamber 14 and the second operating chamber 15.

And one side of the pump body 10 is provided with an exhaust port 18 communicating with the outside.

Next, the shaft 20 is inserted into the shaft hole 19 formed in the pump body 10 so as to be movable to the left and right, which face the first diaphragm 30 and the second diaphragm 40 to each other. It is to connect to see and connect with one another.

That is, the shaft 20 is provided so that one end and the other end protrude into the first operation chamber 14 and the second operation chamber 15, respectively, the first diaphragm 30 and the second diaphragm (one end and the other end) are installed. 40 is connected to pulsate to be integrally opposite to each other in the interior of the first operating chamber (14) and the second operating chamber (15).

Next, the first diaphragm 30 and the second diaphragm 40 are installed to face each other at one end and the other end of the shaft 20, which is a first space of the first operating chamber 14. The first chamber is divided into a fluid chamber 14a and a first air chamber 14b, and the inner space of the second operation chamber 15 is divided into a second air chamber 15b and a second fluid chamber 15a. The fluid is sucked and discharged through the first fluid chamber 14a and the second fluid chamber 15a while pulsating by the pressure of the compressed air entering and exiting the 14b and the second air chamber 15b.

That is, the first diaphragm 30 and the second diaphragm 40 are provided between the left side block 12 and the center block 11 and between the right side block 13 and the center block 11, respectively. In addition, the fluid sucked while being pulsated by the compressed air alternately introduced into the first air chamber 14b and the second air chamber 15b alternately with the first fluid chamber 14a and the second fluid chamber 15b, It is to be discharged to the continuous pumping of the fluid is made.

However, the suction pipe 17 and the discharge pipe 16 suck the fluid to the outside and discharge it to the outside again, and both ends thereof are the first fluid chamber 14a and the second operation chamber ( 15 is communicated with the second fluid chamber 15a.

Next, the air control valve 50 is installed in the pump body 10, which is the first air chamber 14b of the first operation chamber 14 and the second air of the second operation chamber 15. The compressed air entering and exiting the chamber 15b is interrupted.

That is, the air control valve 50 introduces compressed air into the first air chamber 14b and the second air chamber 15b or flows into the first air chamber 14b and the second air chamber 15b. By discharging compressed air, the first diaphragm 30 and the second diaphragm 40 are pulsated left and right along the shaft 20 according to the change in the internal pressure thereof.

Here, the air control valve 50 is installed in the pump body 10, the valve body 51 is provided with an air inlet 51a for injecting compressed air from the outside on one side, and the inside of the valve body 51 It is provided with the spool 52 which is installed so that it can flow up and down, and interrupts the flow of the compressed air injected from the air inlet 51a.

That is, when the compressed air is filled in the first air chamber 14b or the second air chamber 15b and the shaft 20 completely moves to the right or left side, the first air chamber 14b or the second air chamber ( The compressed air of 15b) flows out through the first air outlet passage 53 or the second air outlet passage 54 and flows into the lower space or the upper space of the valve body 51.

At this time, the spool 52 moves up or down in the valve body 51 by the pressure of the compressed air flowing into the lower space or the upper space of the valve body 51. Then, the second air chamber 15b or the first air chamber 14b communicates with the air inlet 51a by the spool 52, and new compressed air injected from the air inlet 51a is introduced into the second air chamber 15b. Or it flows into the 1st air chamber 14b.

At the same time, the first air chamber 14b or the second air chamber 15b communicates with the exhaust port 18 so that the compressed air of the first air chamber 14b or the second air chamber 15b is discharged through the exhaust port 18. It is discharged to the outside.

Then, the first diaphragm 30 and the second diaphragm 40 are simultaneously right or left along the shaft 20 by the pressure of the compressed air flowing into the second air chamber 15b or the first air chamber 14b. Will pulsate.

Therefore, as shown in FIG. 1 or FIG. 2, the fluid is sucked into the first fluid chamber 14a or the second fluid chamber 15a and is already sucked into the second fluid chamber 15a or the first fluid chamber 14a. As the fluid is discharged, continuous pumping of the fluid is achieved.

At this time, the spool 52, the inner space of the valve body 51 as shown in Figure 3, the first pressure space 51b, the second pressure space 51c, the first exhaust space 51d, the second exhaust It is comprised in the form which divides into the space 51e and the inflow space 51f.

That is, the spool 52 has a form in which the plurality of protruding flanges 52a protrude at intervals up and down on the outer circumferential surface so that the spaces are partitioned in the valve body 51. And the outer ring of the protruding flange 52a is installed in close contact with the inner peripheral surface of the valve body 51 is an O-ring 52b for sealing the spaces.

Accordingly, the spool is securely interrupted by the compressed air introduced and discharged through the spaces by the O-ring 52b, so that the lifting motion of the spool 52 generated by the pressure of the compressed air is surely performed.

In this case, the first air space 51b and the second pressure space 51c have the compressed air filled in the second air chamber 15b and the first air chamber 14b, respectively, in the second air outlet 54 and the first air space. An upper space and a lower space of the valve body 51 introduced through the air outlet path 53.

The first exhaust space 51d is a space for discharging the compressed air of the first air chamber 14b to the outside by communicating the first air chamber 14b with the exhaust port 18. The second exhaust space 51e is a space for discharging the compressed air of the second air chamber 15b to the outside by communicating the second air chamber 15b with the exhaust port 18. The inflow space 55f selectively communicates the first air chamber 14b and the second air chamber 15b with the air inlet 51a to the first air chamber 14b and the second air chamber 15b. Space for selectively introducing

Here, the first air outlet path 53 and the second air outlet path 54, as shown in Figure 4, between the shaft hole 19 is inserted into the shaft 20 and the shaft 20 is installed. It is provided.

That is, when the first air outlet path 53 and the second air outlet path 54 remain in a closed state and the shaft 20 completely moves to the left or right side, the first opening and closing means 55 and the second opening and closing direction are opened. The second air chamber 15b and the first air chamber 14b communicate with the first pressure space 51b and the second pressure space 51c of the valve body 51 while being opened by the means 56. .

The first opening and closing means 55 and the second opening and closing means 56, a pair of O-rings (55a) (56b) are provided at regular intervals on the left and right inner peripheral surface of the shaft hole (19), respectively; And grooves 55b and 56b respectively formed on the left and right inner circumferential surfaces of the shaft 20.

That is, the first opening and closing means 55 and the second opening and closing means 56 are located outside the second air chamber 15b and the second air chamber 14b when the shaft 20 moves completely to the right and the left. The O-rings 56a, 55a and the recesses 56b, 55b are placed on the same line, and the second air chamber 15b and the first air chamber 14b are respectively formed by the gaps between the valve bodies 51 by the gaps. It communicates with the 1st pressure space 51b and the 2nd pressure space 51c.

At this time, the exhaust port 18 is composed of a first exhaust port 18a, a second exhaust port 18b, and a third exhaust port 18c. The first exhaust port 18a is a passage through which the compressed air introduced into the first air chamber 14b is discharged to the outside through the first exhaust space 51d.

The second exhaust port 18b is a passage through which the compressed air introduced into the second air chamber 15b is discharged to the outside through the second exhaust space 51e. The third exhaust mechanism 18c is a passage for discharging the compressed air introduced into the first pressure space 51b and the second pressure space 51c to the outside.

However, the outlet side of the first exhaust port 18a and the second exhaust port 18b is configured to communicate with each other, but the outlet of the third exhaust port 18c is the exit side of the first exhaust port 18a and the second exhaust port 18b. It is configured not to communicate with.

This is to ensure the operability of the spool 52 by smoothly discharging the compressed air that is responsible for the lifting movement of the spool 52 discharged through the third exhaust mechanism 18c.

That is, the icing is caused by the temperature difference with the outside in the process of discharging the compressed air of the first air chamber 14b and the second air chamber 15b through the first exhaust pipe 18a and the second exhaust pipe 18b. ) Even if a phenomenon occurs, it is to be discharged smoothly without being affected.

In addition, the first exhaust port 18a and the second exhaust port 18b are configured such that the inner diameter gradually or gradually increases toward the outlet side, which is configured to discharge compressed air to the first exhaust port 18a and the second exhaust port 18b. This is to prevent the icing phenomenon while minimizing the temperature drop by inducing the pressure drop gradually or gradually in the process.

As described above, the diaphragm pump which guarantees the operation reliability according to the present invention controls the flow of compressed air while the spool moves up and down by the pressure of the compressed air, and at the same time the spool is installed with an O-ring to reliably interrupt the compressed air. In addition, since the inoperable state caused by the conventional diaphragm pump can be eliminated as well as structurally simplified, the operating performance can be guaranteed and the product cost can be lowered.

The above embodiments are merely exemplary, and those having ordinary skill in the art may have other embodiments modified in various ways.

Therefore, the true technical protection scope of the present invention should include not only the above embodiments but also various other modified embodiments according to the technical idea of the invention described in the following claims.

10: pump body 11: center block
12, 13: side block 14: first operating room
14a: first fluid chamber 14b: first air chamber
15: second operating chamber 15a: second fluid chamber
15b: 2nd air chamber 16: discharge tube
16a: discharge port 16b: check valve
17: suction pipe 17a: suction port
17b: check valve 18: exhaust port
18a: first exhaust vent 18b: second exhaust vent
18c: third exhaust mechanism 19: shaft hole
20: Shaft
30: first diaphragm
40: second diaphragm
50: air control valve 51: valve body
51a: air inlet 51b: first pressure space
51c: second pressure space 51d: first exhaust space
51e: second exhaust space 51f: inflow space
52: spool 52a: protruding flange
52b: O-ring 53: first air outlet
54: second air outlet 55: first opening and closing means
56: second opening and closing means 55a, 56a: O-ring
55b, 56b: groove

Claims (7)

Discharge pipes 16 and suction pipes 17 are provided on the upper and lower sides, respectively, and exhaust ports 18 communicating with the outside are provided, and the first operation chamber 14 connected to the suction pipes 17 and discharge pipes 16 on the left and right sides, respectively. A pump body 10 in which the second operation chamber 15 is divided;
A shaft 20 installed to be movable left and right of the pump body 10 and having one end and the other end protruding into the first operating chamber 14 and the second operating chamber 15, respectively;
It is installed at one end and the other end of the shaft 20, respectively, partitioning the first operating chamber 14 into the first fluid chamber 14a and the first air chamber 14b, and the second operating chamber 15 to the second air A first diaphragm 30 and a second diaphragm 40 partitioned into a chamber 15b and a second fluid chamber 15a; And
It is composed of a valve body 51 which is installed in the pump body 10 and provided with an air inlet 51a, and a spool 52 which is installed to be able to flow up and down inside the valve body 51, And an air control valve 50 supplied to the inlet 51a to control the flow of compressed air entering and exiting the first air chamber 14b and the second air chamber 15.
The air control valve 50,
When the first air chamber 14b or the second air chamber 15b is filled with compressed air and the shaft 20 moves completely to the right or left side, the first air chamber 14b or the second air chamber 15b Compressed air flows into the lower space or the upper space of the valve body 51 through the first air outlet passage 53 or the second air outlet passage 54 to move the spool 52 up or down while moving the first air chamber. 14b or the compressed air in the upper space or the lower space of the valve body 51 together with the compressed air of the second air chamber 15b is discharged to the outside through the exhaust port 18 and at the same time the air inlet 51a As the new compressed air flows from the second air chamber 15b or the first air chamber 14b, the first diaphragm 30 and the second diaphragm 40 are right or left along the shaft 20. And pulsating the fluid into the first fluid chamber 14a or the second fluid chamber 15a and passing the fluid to the second fluid chamber 15a or the first fluid chamber 14a. A diaphragm pump with guaranteed operational reliability, characterized in that pumping of the fluid is performed continuously while discharging uninhaled fluid. The method of claim 1,
The spool 52,
The first exhaust space for communicating the first pressure space 51b, which is the upper space, the second pressure space 51c, which is the lower space, the first air chamber 14b, and the exhaust port 18 to the inside of the valve body 51. 51d, the second exhaust space 51e for communicating the second air chamber 15b and the exhaust port 18, and the first air chamber 14b, the second air chamber 15b, and the air inlet 51a. A plurality of protruding flanges 52a are formed on the outer circumferential surface so as to be partitioned by the inflow space 51f to communicate with each other, and are formed to protrude at an upper and lower intervals.
On the outside of the protruding flange 52a,
O-ring (52b) is provided in close contact with the inner circumferential surface of the valve body (51) for hermetically sealing the diaphragm pump is guaranteed. 3. The method of claim 2,
The first air outlet 53 and the second air outlet 54,
The shaft 20 is provided between the shaft hole 19 and the shaft 20 to be inserted and installed,
When the shaft 20 is completely moved to the right and to the left, the first opening and closing means 55 and the second opening and closing means 56 are opened to open the first air chamber 14b and the second air chamber 15b, respectively. Diaphragm pump ensures the operation reliability, characterized in that to communicate with the second pressure space (51c) and the first pressure space (51b) of the body (51). The method of claim 3,
The first opening and closing means 55 and the second opening and closing means 56,
A pair of O-rings 55a and 56a which are installed at predetermined intervals on the left and right inner circumferential surfaces of the shaft hole 19, respectively; And
Consists of grooves (55b, 56b) formed on the left and right inner peripheral surface of the shaft 20, respectively,
The o-rings 56a and 55a and the recesses 56b and 55b located on the outside close to the second air chamber 15b and the first air chamber 14b when the shaft 20 is completely moved to the right and the left are collinear. The second air chamber 15b and the first air chamber 14b are communicated with the first pressure space 51b and the second pressure space 51c of the valve body 51 by the gaps formed between them. Diaphragm pump is characterized in that the operation reliability is guaranteed. 3. The method of claim 2,
The exhaust port 18
A first exhaust mechanism 18a for discharging the compressed air introduced into the first air chamber 14b to the outside through the first exhaust space 51d;
A second exhaust mechanism 18b for discharging the compressed air introduced into the second air chamber 15b to the outside through the second exhaust space 51e; And
Guaranteed operation reliability, characterized in that separated by; a third exhaust mechanism (18c) for discharging the compressed air introduced into the first pressure space (51b) and the second pressure space (51c) of the valve body 51 to the outside; Diaphragm pump. The method of claim 5,
The outlet side of the first exhaust port 18a and the second exhaust port 18b is
Configured to communicate with each other,
The outlet side of the third exhaust mechanism 18c is
A diaphragm pump with guaranteed operational reliability, characterized in that it is configured not to communicate with the outlet side of the first exhaust port (18a) and the second exhaust port (18b). The method according to claim 5 or 6,
The first exhaust port 18a and the second exhaust port 18b are
A diaphragm pump assured of operational reliability, characterized in that the inner diameter is configured to expand gradually or gradually toward the outlet.

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