KR200238050Y1 - Diaphram pump - Google Patents

Abstract

Disclosed is a diaphragm pump in which the output power is constant and the output power is adjustable. The pump is coupled to the upper housing 100 and the upper housing 100 in which the partition 103 is formed to partition the inlet chamber 110 and the outlet chamber 120, and the pressure change is caused by the vibration of the diaphragm 220. Interposed between the lower housing 200 in which the pump chamber 210 is generated and the upper and lower housings, the inlet valve 310 and the outlet valve 320 are coupled, and the inlet hole 301 and the outlet hole 302 are formed. A valve support 300 is provided. In addition, the partition 103 is provided with a bypass passageway 102 for communicating the inlet chamber 110 and the outlet chamber 120. When the pressure in the discharge chamber is formed to the hydraulic pressure is higher than the set pressure, it is returned to the inlet chamber through the bypass passage (102). Such a pump is provided with a bypass passage that communicates the outlet chamber and the inlet chamber, so that when the hydraulic pressure is formed in the outlet chamber above the set pressure, the partial hydraulic pressure is returned to the inlet chamber through the bypass passage to make the discharge pressure constant. In addition, it is possible to control the discharge pressure through the adjustment screw 170 without disassembling according to the performance of the pump. In addition, in forming the bypass structure, a structure that is assembled inside the pump is adopted and fixed by using the shape of the valve support 300 to enable a reduction in the number of parts.

Description

Diaphragm Pump

The present invention relates to a diaphragm pump, and more particularly, to a diaphragm pump having an improved structure so that a part of the fluid can be bypassed to the inlet side when the discharge pressure discharged through the outlet valve is excessive. .

The diaphragm pump, which is used when the working fluid is not in direct contact with the applied fluid and is to be operated, is operated to inhale and discharge the fluid as the pressure in the pump chamber changes as the diaphragm vibrates.

Figure 1 schematically shows such a conventional diaphragm pump. The upper housing 30 having an annular rib 30a formed on an inner circumferential surface thereof and the lower housing 31 to which the motor shaft 17 is coupled are coupled to each other, and suction holes are formed between the upper and lower housings 30 and 31. The valve support 40 in which the 41 and the discharge hole 42 are formed is housed.

The space between the outer side of the annular rib 30a and the valve support 40 forms an inlet chamber 23 in which fluid to be sucked remains, and the space between the inner side of the annular rib 30a and the valve support 40 is A water discharge chamber 26 through which the fluid is discharged is formed, and a plurality of pump chambers 24 are formed between the valve support 40 and the lower housing 31 to generate pressure changes to suck and discharge the fluid.

Each of the plurality of pump chambers 24 is connected to the inlet chamber 23 and the outlet chamber 26, respectively, and the suction hole 41 and the discharge hole 42 correspond to the plurality of pump chambers 24, respectively. It is formed by the number.

The inlet valve 25 and the outlet valve 27 for opening and closing the suction hole 41 and the discharge hole 42 are respectively supported by the valve support 40.

Meanwhile, the motor shaft 17 is supported by the lower housing 31, and an eccentric bush 18 is press-fitted into the shaft 17, and a bearing 19 is coupled to the outer circumference of the bush 18. Is supported by the lower housing 31.

In addition, a plurality of openings 32 are formed in the lower housing 31 to communicate with the respective pump chambers 24, and each of the openings 32 moves up and down in synchronization with the bearing 19 which is rotated eccentrically. And a fixing member 21 fixed to the moving member 20 is provided. And the edge is sandwiched between the valve support 40 and the lower housing 31 with the diaphragm 22 interposed between the movable member 20 and the fixing member 21 to fix it.

Here, the diaphragm 22 is provided corresponding to each said pump chamber 24, and each of these diaphragms 22 is formed integrally.

On the other hand, each inlet valve 25 provided in each pump chamber 24 is provided with a pressure regulating valve 28, respectively. The pressure regulating valve 28 moves the valve 28 to the upper portion while compressing the spring member 29 when the excessive pressure is applied in the pump chamber 24 to expand the space, thereby opening the discharge hole 42 at the set pressure. It is operated to discharge the fluid through.

In the conventional diaphragm pump as described above, each of the movable members 20 vibrates up and down sequentially by the bearing 19 which is eccentrically rotated, and at the same time, each diaphragm 22 vibrates up and down sequentially in each pump chamber. As the pressure of the 24 decreases or increases, the inlet valve 25 and the outlet valve 27 are sequentially operated to pump the fluid.

However, the diaphragm pump having the above configuration has the following problems.

First, the valve 28 is accommodated in the upper housing 30 it is impossible to adjust the pressure from the outside. Therefore, when the pressure is adjusted, there is a need to disassemble the upper and lower housings 30 and 31.

Second, since the vertical movement distance of the valve 28 is limited by the upper housing 30 and the inlet valve 25, control is not possible despite the use of the valve 28 when the discharge pressure is excessive.

The present invention was created to solve the above problems, and has the following objectives.

First, the present invention provides a diaphragm pump in which a constant pressure is discharged by bypassing hydraulic pressure discharged above a set pressure with a simple structure.

Second, it provides a diaphragm pump that can adjust the bypassed hydraulic pressure from the outside of the pump, and reduces the cost by reducing the number of parts while performing the same function.

1 is a schematic cross-sectional view showing a conventional diaphragm pump,

2 is a schematic cross-sectional view showing a diaphragm pump according to the present invention;

Figures 3a and 3b is an operation of the main part of the pump of the present invention.

* Explanation of symbols for main parts of the drawings

100.Upper housing 110.Intake room

120.Export chamber 130 ... Cap member

140.Plate 170.Adjustment Screw

180 ... spring member 200 ... lower housing

210 ... pump chamber 220 ... diaphragm

300.Valve support 301

302 Water outlet 310 Water inlet valve

320.Outlet valve

In order to achieve the above object, the present invention provides an inlet and outlet chamber for sucking and discharging a working fluid, a pump chamber for exerting a pressure necessary for suction and discharge of the working fluid, and between the inlet and pump chambers and between the pump chamber and the outlet chamber. A housing means having inlet and outlet holes for communicating with each other, a diaphragm vibrating to change an internal pressure of the pump chamber of the housing means, a diaphragm operating means for the operation thereof, and the working fluid from the inlet chamber to the pump chamber; A diaphragm pump comprising valve means for opening and closing the inlet and outlet holes, respectively, in response to a change in the pump chamber pressure so as to be moved from one side of the pump chamber to the outlet chamber and only one is blocked. The bypass passage for communicating the inlet and outlet room with each other It further has a means for opening and closing the bypass passage in accordance with the pressure of the exit chamber, the through hole and the through hole which is installed in the inlet chamber to divide the inside into the inlet hole side and the bypass passage side and communicate both sides A cap member having a concave groove and a connecting hole for communicating the groove with the bypass passage, and contracted and expanded in accordance with the pressure change in the groove communicating with the discharge chamber while being covered by the cap member, between the through hole and the groove of the cap member. The diaphragm pump is provided with a plate made of an elastic material that opens and closes.

Preferably, as an adjusting means for adjusting the bypass pressure, the housing means further has a control hole for communicating with the outside, the slider is housed in the control hole of the housing means so as to contact and slide against the plate; A spring member that elastically pushes the slider so that the gap between the through hole of the cap member and the groove is normally closed; and a screw that is rotatably received inside the adjusting hole of the housing means and that can be rotated externally through the adjusting hole. The adjusting screw and the spring member is supported on the opposite side of the plate and screwed with the adjusting screw to move the moving member to change the elasticity of the spring member according to the rotational operation thereof.

According to the features of the present invention, the diaphragm pump of the present invention is formed by the bypass passage for communicating the outlet chamber and the inlet chamber when the hydraulic pressure is formed in the outlet chamber more than the set pressure to the inlet chamber through the bypass passage The discharge pressure is made constant by returning. In addition, in forming such a structure, it is possible to reduce the number of parts by assembling inside the pump and by using the shape of the valve support to serve as a support for the separation prevention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to FIGS. 2, 3A, and 3B, which illustrate a diaphragm pump that performs a pumping operation of sucking and discharging fluid due to a pressure change in the pump chamber 75 generated by vibrating the diaphragm 140, the housing As a means, the upper housing 100 and the upper housing 100 having the partition 103 partitioning the inlet chamber 110 and the outlet chamber 120 are formed, and the pressure change is caused by the vibration of the diaphragm 220. Interposed between the lower housing 200 in which the pump chamber 210 is generated, and the upper and lower housings 100 and 200, the inlet valve 310 and the outlet valve 320 are coupled, and the inlet hole 301 and outlet There is a valve support 300 in which a ball 302 is formed. The inlet valve 310 and the outlet valve 320 of the valve means open and close the inlet hole 301 and the outlet hole 302 in response to a pressure change in the pump chamber 210 according to the vibration operation of the diaphragm. Is to be moved from each inlet to the pump room and from the pump room to the outlet room and blocked off on each other.

A motor is used for the operation means of the diaphragm 220. As shown in part in FIG. 2, a motor shaft 230 is rotatably supported by the lower housing 200, and a diaphragm is supported by the motor shaft 230. Eccentric cam 240 to vibrate 220 is coupled.

As a pressure control means for controlling the discharge pressure of the outlet chamber 120, a bypass passage 102 for communicating the inlet chamber 110 and the outlet chamber 120 to the partition 103 of the upper housing 100 is formed. And the opening and closing means for opening and closing the bypass passage 102 according to the pressure of the water outlet chamber 120.

The opening and closing means is composed of a cap member 130 and the plate 140. The cap member 130 is inserted into the inlet chamber 110 and divides the inside into the inlet hole 301 side and the bypass passage 102 side. The cap member 130 penetrates through the center and is concave around it. It has a groove 133. Plate 140 is made of a flexible elastic material, such as a rubber plate, is coupled to the upper housing 100 while being in close contact with the upper surface of the cap member 130 and elastically stretched according to the pressure change in the groove 133 through the through hole ( Open and close between 132 and groove 133. At this time, the cap member is supported by the valve support 300 to prevent separation.

And as an adjusting means for adjusting the bypass pressure, the adjustment hole 101 is formed in the upper housing 100, the slider 150, the spring member 150 inside the adjustment hole 101 of the upper housing 100 The moving member 160 is provided with an adjusting screw 170. The slider 150 is accommodated and slidably received with respect to the plate, and the spring member 180 elastically presses the slider 150 in a contracted state by the moving member 180 to allow the slider 150 to plate. 140 acts to block between the through-hole 132 and the groove 133 of the cap member 130 normally. The moving member 180 is screwed with the adjusting screw 170 and the adjusting screw 170 can be rotated by operating the screwdriver from the outside through the adjusting hole 101. That is, the elasticity of the spring member 150 can be adjusted by operating the adjusting screw 170, and thus the plate 140 can be operated only when a predetermined or more discharge pressure is applied.

The subject innovation diaphragm pump having the configuration as described above is operated as follows. First, when the eccentric cam 240 is rotated by the driving of the motor, the diaphragm 220 vibrates and a pressure change occurs in the pump chamber 210. When the pressure in the pump chamber 210 is lowered, as shown in FIG. 3A, the inlet hole 301 is opened to allow fluid to flow therein, and when the pressure in the pump chamber 210 is increased, the water outlet hole is shown in FIG. 3B. As the 302 is opened, the fluid is discharged to the water outlet chamber 120.

On the other hand, during operation of the pump as described above, when the pressure in the pump chamber 210 is excessively high and the fluid is discharged above the set pressure, as shown in Figure 3b, the cap member via the bypass passage 102, The hydraulic pressure is supplied to the groove 133 of the 130, and the plate 140 is deformed by the supplied hydraulic pressure so that the fluid from the water extraction chamber 120 is returned to the inlet chamber 110. At this time, the slider 150 is moved in accordance with the deformation of the plate 140 to contract the spring member 180.

Accordingly, the hydraulic pressure exceeding the set pressure is bypassed to the inlet chamber 110 through the bypass passage 102, thereby enabling discharge at a constant pressure.

When the discharge pressure is to be adjusted according to the performance of the pump, the bypass pressure is set by adjusting the adjustment screw 170 to adjust the spring force of the spring member 180.

On the other hand, the present invention as described above is not limited to the above embodiments and can be practiced by adding many modifications without departing from the spirit and scope of the present application.

The present invention as described above has the following advantages.

First, when the hydraulic pressure is formed in the water discharge chamber by the bypass passage to communicate with the water extraction chamber and the inlet chamber, a part of the hydraulic pressure is returned to the inlet chamber through the bypass passage to make the discharge pressure constant. Accordingly, it is possible to prevent noise and damage to the valve due to excessive discharge pressure.

Second, it is possible to control the discharge pressure through the adjustment screw without disassembling according to the performance of the pump.

Third, assembling the bypass structure for the above effects from the inside of the pump, and by using the valve support which is an existing component to serve as a support for the separation prevention to enable the reduction of the number of parts.

Claims (2)

Inlet and outlet chambers for suction and discharge of working fluids, pump chambers for exerting pressure required for suction and discharge of working fluids, and inlet and outlet holes communicating between the inlet and pump chambers and between the pump and outlet chambers, respectively. Each of which has a housing means, a diaphragm vibrating to change the internal pressure of the pump means of the housing means, a diaphragm actuating means for its operation, and one side of the working fluid from the inlet chamber to the pump chamber and from the pump chamber to the outlet chamber. In the diaphragm pump comprising a valve means for opening and closing the inlet and outlet holes respectively in response to the pump chamber pressure change so that the only movement and blocking each other, The housing means further has a bypass passage for communicating with the water inlet chamber and the water outlet chamber, the means for opening and closing the bypass passage according to the pressure of the water outlet chamber, which is installed in the inlet chamber and the inside of the inlet chamber. A cap member having a through hole for dividing into a lateral side and the bypass passage side and communicating with both sides thereof, a concave groove around the through hole and a connecting hole for communicating the groove and the bypass passage with the outlet member; A diaphragm pump, characterized in that it is provided with a plate made of a stretchable material which contracts and expands in response to a pressure change in the groove to open and close between the through-hole and the groove of the cap member. According to claim 1, wherein the housing means further has a control hole for communicating with the outside, the slider is housed in the control hole of the housing means so as to contact and slide against the plate, between the through hole and the groove of the cap member A spring member for elastically pushing the slider so that it is normally closed, an adjusting screw having a screw that is rotatably received inside the adjusting hole of the housing means and which can be rotated externally through the adjusting hole, and the spring member The diaphragm pump further comprises a moving member supporting the opposite side of the plate and screwed with the adjusting screw to change the elasticity of the spring member in accordance with its rotational operation.