CN216866980U

CN216866980U - Manual-automatic integrated exhaust valve and hydraulic diaphragm metering pump

Info

Publication number: CN216866980U
Application number: CN202220278648.5U
Authority: CN
Inventors: 卫中山; 高海东; 姜付兵
Original assignee: Yidasi Technology Suzhou Co ltd
Current assignee: Yidasi Technology Suzhou Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-07-01
Anticipated expiration: 2032-02-11

Abstract

The utility model discloses a manual-automatic integrated exhaust valve and a hydraulic diaphragm metering pump, wherein the manual-automatic integrated exhaust valve comprises a valve body, a valve rod and a valve ball, the valve body is provided with a valve cavity, the valve ball is arranged in the valve cavity, an exhaust passage is arranged in the valve body, one end of the exhaust passage is communicated with the outside, the other end of the exhaust passage is communicated with one end of the valve cavity, the other end of the valve cavity is used for being communicated with a hydraulic oil cavity of the hydraulic diaphragm metering pump, and the valve ball can close and open the exhaust passage through sliding; manual-automatic discharge valve still includes: the pressing mechanism is movably connected with the end part of the valve body and can drive the valve ball to slide through the valve rod so as to enable the exhaust passage to be communicated with the valve cavity. According to the exhaust valve, the pressing mechanism is arranged, the valve rod can be pushed to press downwards by the pressing mechanism, the valve ball is pushed away from the joint of the valve cavity and the exhaust passage, the exhaust passage is communicated with the valve cavity, the connection time of the exhaust passage is prolonged, and the exhaust rate of the exhaust valve is manually improved.

Description

Manual-automatic integrated exhaust valve and hydraulic diaphragm metering pump

Technical Field

The utility model relates to a valve body, in particular to a manual-automatic integrated exhaust valve and a hydraulic diaphragm metering pump.

Background

A diaphragm pump is a common type of pump, the diaphragm being an important part of the pump, the diaphragm being a hydraulic oil chamber on one side and a medium chamber on the other side. The diaphragm pump drives the diaphragm to move towards the front end or the rear end through the reciprocating motion of the piston on the side of the hydraulic oil cavity, so that an inlet valve and a discharge valve of the hydraulic end on the other side of the diaphragm are driven to be alternately opened and closed, reciprocating liquid inlet and discharge are realized, and medium conveying is realized. When normal work, the gas is few in the hydraulic pressure oil pocket, but when refueling to the hydraulic pressure oil pocket, the hydraulic pressure oil pocket is opened and to be sneaked into a large amount of air, and the air sneakes into and makes the volume change of hydraulic oil in the hydraulic oil, and then leads to the output flow reduction or the unstable condition of diaphragm pump to accompany noise and vibration, consequently need use the gas discharge diaphragm pump of sneaking into in the exhaust valve to the hydraulic oil.

In the prior art, an automatic exhaust valve is mainly adopted when a hydraulic oil cavity of a diaphragm pump is exhausted, the automatic exhaust valve mainly comprises a valve body, a valve ball and a valve post, the valve body is communicated with the hydraulic oil cavity of the diaphragm pump, the diaphragm pump moves as a piston and is divided into an exhaust stroke and a suction stroke, hydraulic oil in the hydraulic oil cavity is extruded and gushes into the valve body under the exhaust stroke, the valve ball and the valve post are pushed to move upwards, air in the hydraulic oil cavity bypasses the valve ball to be exhausted out of the valve body at the moment, the pressure in the hydraulic oil cavity continues to rise, the valve ball is pushed to continue to rise and block the valve body, the hydraulic oil is prevented from leaking under high pressure, and the exhaust under the exhaust stroke is finished; during the suction stroke, the hydraulic oil cavity is in negative pressure, the valve ball of the exhaust valve rapidly falls back under the atmospheric pressure and the help of the valve column and closes the valve body, and the external gas is prevented from being sucked into the hydraulic oil cavity by adsorption.

Automatic exhaust valve's advantage lies in not needing manual intervention can last the exhaust, but during the filling hydraulic oil, because the gas of sneaking into in the hydraulic oil is more, need the diaphragm pump operation long time through automatic exhaust valve exhaust and can arrange the gas of sneaking into in the hydraulic oil gradually, and exhaust speed is slow, and the time that leads to the diaphragm pump to dispatch from the factory to test and the maintenance debugging is very long, seriously influences the availability factor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of long exhaust time and poor efficiency of an exhaust valve after hydraulic oil is injected by a pressurized liquid in the prior art, and provides a manual-automatic integrated exhaust valve and a hydraulic diaphragm metering pump comprising the same.

The utility model solves the technical problems through the following technical scheme:

a manual-automatic integrated exhaust valve comprises a valve body, a valve rod and a valve ball, wherein the valve body is provided with a valve cavity, the valve ball is arranged in the valve cavity, an exhaust passage is arranged in the valve body, one end of the exhaust passage is communicated with the outside, the other end of the exhaust passage is communicated with one end of the valve cavity, the other end of the valve cavity is used for being communicated with a hydraulic oil cavity of a hydraulic diaphragm metering pump, and the valve ball can close and open the exhaust passage through sliding;

manual-automatic discharge valve still including:

the pressing mechanism is movably connected with the end part of the valve body and can drive the valve ball to slide through the valve rod so as to enable the exhaust passage to be communicated with the valve cavity.

In this scheme, be equipped with valve pocket and exhaust passage on the valve body, exhaust passage intercommunication valve body's outside, the valve ball slides in the valve pocket, close exhaust passage when the valve ball slides to the junction of valve pocket and exhaust passage, open exhaust passage when the valve ball slides and keeps away from the junction of valve pocket and exhaust passage, still be equipped with pressing means on the valve body, make the valve rod push down and drive the valve ball through artifical drive pressing means and keep away from the junction of valve pocket and exhaust passage, and then open exhaust passage, exhaust passage can be after being opened with the valve pocket intercommunication and the unnecessary air in the hydraulic oil chamber is arranged to the liquid, pressing means can further prolong the time that the valve ball kept away from the junction of valve pocket and exhaust passage, and then make the extension of discharge valve exhaust time, the air can be more abundant, quick discharge hydraulic oil chamber.

Preferably, the valve body comprises a valve seat and a valve body, the valve seat is detachably connected with the valve body, and the valve cavity is defined by the valve seat and the valve body.

In this scheme, the bottom of valve body is located to the disk seat, the valve body bottom is equipped with block portion, the disk seat corresponds block portion and is equipped with joint portion, the disk seat is connected with the valve body joint, the valve pocket is located the disk seat upper end and is enclosed synthetic valve pocket through valve body lower extreme surface, the valve pocket upper end communicates with exhaust passage and is equipped with the junction, the valve pocket lower extreme communicates with the hydraulic oil cavity and is equipped with the junction, the valve ball slides to the junction can laminate in the surface and the shutoff junction of junction, the valve ball shutoff valve pocket makes this discharge valve of air unable discharge with exhaust passage's junction, and the junction of valve ball shutoff valve pocket and hydraulic oil cavity makes in the air of external can't get into the hydraulic oil cavity from the valve pocket, otherwise, can open the valve pocket when the valve pocket is kept away from the junction of valve pocket and exhaust passage and make the air can discharge from exhaust passage smoothly.

Preferably, the exhaust passage is arranged in the valve body, a through hole is formed in the valve seat, the valve cavity is communicated with a hydraulic oil cavity of the hydraulic diaphragm metering pump through the through hole, and the valve ball can close and open the through hole through sliding.

In this scheme, the disk seat is provided with the through-hole with the junction of hydraulic oil cavity intercommunication, the size of valve ball is greater than the through-hole, can close being connected of hydraulic oil cavity and valve pocket when the valve ball falls on the through-hole, and then prevent that external air from passing through exhaust passage enters into in the hydraulic oil cavity, otherwise, can open being connected of hydraulic oil cavity and valve pocket when the through-hole is kept away from to the valve ball, hydraulic oil can gush into the valve intracavity and carry out the work of hydraulic oil and air separation, so that further open the junction of valve pocket and exhaust passage and carry out the exhaust operation.

Preferably, the joint of the valve cavity and the through hole and the joint of the valve cavity and the exhaust passage are provided with sealing parts, and the valve ball can be attached to the sealing parts and close the valve cavity.

In this scheme, the sealed portion is the sealed face that sets up in through-hole and valve pocket and exhaust passage junction, and the size of sealed face cooperatees with the size of valve ball and sets up, can seal the valve pocket when the valve ball slides to sealed face on to the purpose of realizing closing the valve pocket.

Preferably, the outer circumferential surface of the valve body is provided with an external thread, and the external thread is used for threaded connection between the valve body and the pump body.

In this scheme, be equipped with the screw hole on the pump body, the valve body spiro union is in the pump body, and the joint strength of this kind of structure is stronger and convenient to detach and installation, is a preferred structural configuration of this application.

Preferably, the manual-automatic exhaust valve further comprises a first sealing element, the first sealing element is sleeved at one end of the valve body, and the first sealing element is used for sealing a gap between the valve body and a pump body of the hydraulic diaphragm metering pump.

In this scheme, first sealing member cover is located on the valve body and first sealing member is located the recess of the pump body, and the valve body is equipped with the boss corresponding to first sealing member, and the leakproofness that the pump body is connected with the valve body is improved in the upper surface of first sealing member and with the cooperation of first sealing member to the boss butt.

Preferably, pressing means includes valve cap and elastic component, the valve cap detains to be located the valve body top can be followed vertical direction and slided, the elastic component is located the valve cap with between the valve body, the elastic component provides one the reaction force after the valve cap pushes down, the middle part of valve cap has the bulge, the bulge is used for ejecting the valve rod.

In this scheme, the one end swing joint that the hydraulic oil cavity was kept away from to the valve body has valve cap and elastic component, and the valve cap is equipped with the bulge, and the bulge stretches into in the valve body and ejection valve rod, and elastic component and bulge coaxial coupling are located the valve cap, provide the resilience force after the valve cap pushes down, are the preferred structure setting of this application.

Preferably, the surface of the end of the valve body is provided with a limiting portion corresponding to the valve cap, an inner wall of one end of the valve cap, which is far away from the limiting portion, is provided with a blocking eave, and the valve cap can slide between the limiting portion and the blocking eave.

In this scheme, the valve body is equipped with the spacing portion of horizontal direction, and spacing position is in the valve cap, and the tip of valve cap corresponds spacing portion and is equipped with and keeps off the eaves, and spacing portion and keep off and have the certain distance between the eaves, the stroke that the valve cap pushed down promptly, this stroke makes the valve cap can not break away from the tip of valve body when the resilience resets, conveniently presses the valve cap next and exhausts the operation, has improved the rate of reuse.

Preferably, the valve body further comprises a second sealing element, the second sealing element is sleeved on the protruding portion, and the second sealing element is used for sealing a gap between the protruding portion and the valve body.

In this scheme, be equipped with the mounting groove in the valve body, the mounting groove corresponds week side setting of bulge, and the second sealing member is located the mounting groove, and the bulge is when removing or resuming initial position, and the second sealing member all corresponds week side that is located the bulge, improves the leakproofness between bulge and the valve body, prevents that hydraulic oil from leaking along the clearance between bulge and the valve body.

The utility model provides a hydraulic pressure diaphragm metering pump, its includes pump body and above-mentioned arbitrary one manual-automatic discharge valve, manual-automatic discharge valve connect in the top of pump body, the pump body still includes the hydraulic oil cavity, manual-automatic discharge valve's valve pocket with hydraulic oil cavity intercommunication.

The positive progress effects of the utility model are as follows: the automatic exhaust valve is provided with a valve body, a valve rod, a valve ball and an exhaust passage, wherein the valve body is provided with a valve cavity and the exhaust passage, the valve ball is connected in the valve cavity in a sliding manner, the exhaust passage is closed when the valve ball slides to the joint of the valve cavity and the exhaust passage, the exhaust passage is opened when the valve ball is far away from the joint, the other end of the valve cavity is communicated with a hydraulic oil cavity of a hydraulic diaphragm metering pump, and the automatic exhaust function of the automatic exhaust valve can be realized when the valve ball opens or closes the exhaust passage; meanwhile, the automatic exhaust valve is further provided with a pressing mechanism, the pressing mechanism can push the valve rod to press downwards, the valve rod is driven to press downwards through manual driving of the pressing mechanism, the valve ball is driven to be away from the joint of the valve cavity and the exhaust channel, the exhaust channel is opened, redundant air in the hydraulic oil cavity can be exhausted more quickly through the exhaust valve under manual driving, the time of the valve ball being away from the joint of the valve cavity and the exhaust channel can be further prolonged through the pressing mechanism, the exhaust time of the exhaust valve is prolonged, air can be exhausted from the hydraulic oil cavity more fully and quickly, the manual exhaust function on the basis of automatic exhaust is achieved, and the exhaust efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of an automatic exhaust valve according to an embodiment of the present invention in an automatic exhaust state.

Fig. 2 is a schematic structural view of the manual-automatic integrated exhaust valve in a manual exhaust state according to an embodiment of the present invention.

Fig. 3 is a schematic view illustrating a connection relationship between the manual/automatic integrated exhaust valve and the hydraulic diaphragm metering pump according to an embodiment of the present invention.

Description of reference numerals:

valve body 1

Valve stem 11

Valve ball 12

Valve cavity 13

Sealing part 131

Exhaust passage 14

Valve seat 15

Through hole 151

Valve body 16

Pressing mechanism 2

Projection 21

Valve cap 22

Eaves 221

Elastic member 23

Pump body 3

Plunger 31

Hydraulic oil chamber 32

Diaphragm 33

Fluid 34

Exhaust port 35

Pump head 36

First seal 4

Second seal 5

Stopper 6

Detailed Description

The present invention will be more clearly and completely described below with reference to the accompanying drawings, which are given by way of illustration of preferred embodiments, but are not intended to limit the scope of the utility model.

As shown in fig. 3, a plunger 31 is arranged in the pump body 3 of the hydraulic diaphragm metering pump, the plunger 31 is communicated with the hydraulic oil chamber 32, the reciprocating motion of the plunger 31 pushes the hydraulic oil in the hydraulic oil chamber 32 to move, and the hydraulic oil pushes the diaphragm 33 to reciprocate to realize the suction and discharge of the fluid 34 of the hydraulic diaphragm metering pump.

The embodiment provides a manual-automatic integrated exhaust valve, which comprises a valve body 1, a valve rod 11 and a valve ball 12, wherein the valve body 1 is provided with a valve cavity 13, the valve ball 12 is arranged in the valve cavity 13, the valve body 1 is internally provided with an exhaust passage 14, one end of the exhaust passage 14 is communicated with the outside, the other end of the exhaust passage 14 is communicated with one end of the valve cavity 13, the other end of the valve cavity 13 is used for being communicated with a hydraulic oil cavity 32 of a hydraulic diaphragm metering pump, and the valve ball 12 can close and open the exhaust passage 14 through sliding;

manual-automatic discharge valve still includes:

the pressing mechanism 2 is movably connected with the end part of the valve body 1, and the pressing mechanism 2 can drive the valve ball 12 to slide through the valve rod 11 so as to enable the exhaust passage 14 to be communicated with the valve cavity 13.

As shown in fig. 1 and 3, the valve body 1 is disposed above and connected to the hydraulic diaphragm metering pump, the valve body 1 is provided with a valve cavity 13 disposed in a vertical direction and an exhaust passage 14 disposed in a horizontal direction, the valve cavity 13 is communicated with the exhaust passage 14, the exhaust passage 14 is communicated with the outside of the valve body 1, the valve ball 12 slides in the valve cavity 13, the pressing mechanism 2 is provided with a protrusion 21, one end of the protrusion 21 extends into a sliding groove in the valve body 1 and abuts against the valve rod 11, the pressing mechanism 2 is manually pressed down, so that the protrusion 21 pushes the valve rod 11 along the sliding groove to move downward in the valve body 1 and further pushes the valve ball 12 to move in the valve cavity 13 through the valve rod 11, when the valve ball 12 slides to a cavity junction of the valve cavity 13, the valve cavity 13 is closed, when the valve ball 12 slides and is far away from the cavity junction of the valve cavity 13, the valve cavity 13 is opened, and the valve cavity 13 can be communicated with the exhaust passage 14 and exhaust excess air in the hydraulic oil cavity 32 after being opened, the pressing mechanism 2 can further prolong the time of the valve ball 12 far away from the cavity connecting part of the valve cavity 13, so that the working time of the exhaust valve is prolonged, and air can be discharged out of the hydraulic oil cavity 32 more sufficiently and rapidly.

In a preferred embodiment of this embodiment, a central channel in a vertical direction is further disposed in the valve body 1, the central channel penetrates through the valve body 1, the valve cavity 13 is located below the central channel, the central channel is communicated with the valve cavity 13, the exhaust channel 14 is communicated with the central channel, the protrusion 21 of the pressing mechanism 2 and the valve rod 11 are movably connected in the central channel, a gap exists between the valve rod 11 and an inner wall of the central channel, and air can flow into the central channel along the valve cavity 13 through the gap and is exhausted to the outside of the valve body 1 through the exhaust channel 14.

In the embodiment, the valve body 1 includes a valve seat 15 and a valve body 16, the valve seat 15 is detachably connected to the valve body 16, and the valve seat 15 and the valve body 16 enclose a valve chamber 13.

As shown in fig. 1 and fig. 2, the valve seat 15 is disposed at the bottom of the valve body 16, the bottom of the valve body 16 is provided with a fastening portion, the valve seat 15 is provided with a fastening portion corresponding to the fastening portion, the valve seat 15 is connected with the valve body 16 in a fastening manner, the valve cavity 13 is disposed at the upper end of the valve seat 15 and surrounds the valve cavity 13 through the lower end surface of the valve body 16, the upper end of the valve cavity 13 is communicated with the exhaust passage 14 and is provided with a connection portion, the lower end of the valve cavity 13 is communicated with the hydraulic oil chamber 32 and is provided with a connection portion, under atmospheric pressure, the plunger 31 in the hydraulic diaphragm metering pump reciprocates and provides pressure to the hydraulic oil chamber 32, the pressure causes the hydraulic oil to push the valve ball 12 to float upward and further cause the hydraulic oil to flow into the valve cavity 13, the valve cavity 13 is opened, at this time, the air in the hydraulic oil is separated from the hydraulic oil in the valve cavity 13 and automatically discharged along the exhaust passage 14, which is an automatic exhaust function of the exhaust valve, the valve ball 12 slides to the joint of the valve cavity 13 and the exhaust passage 14 and can be attached to the surface of the joint and seal the joint, and at the moment, the automatic exhaust function is closed; when the plunger 32 continues to reciprocate, so that negative pressure is formed in the hydraulic oil chamber 32, the valve ball 12 slides to the joint of the valve cavity 13 and the hydraulic oil chamber 32 under the influence of the negative pressure, so that outside air is prevented from entering the hydraulic oil chamber 32, and the effectiveness of air exhaust is ensured.

In the present embodiment, the exhaust passage 14 is provided in the valve body 16, the valve seat 15 is provided with a through hole 151, the valve chamber 13 communicates with the hydraulic oil chamber 32 of the hydraulic diaphragm metering pump through the through hole 151, and the valve ball 12 can close and open the through hole 151 by sliding.

As shown in fig. 1 and 2, a through hole 151 is provided at a connection position where the valve seat 15 is communicated with the hydraulic oil chamber 32, the through hole 151 is located below the valve chamber 13 and is communicated with the valve chamber 13, the size of the valve ball 12 is larger than that of the through hole 151, when the valve ball 12 falls on the through hole 151, the connection between the hydraulic oil chamber 32 and the valve chamber 13 can be closed, thereby preventing outside air from entering the hydraulic oil chamber 32, when the valve ball 12 is attached to the connection position between the valve chamber 13 and the exhaust passage 14, the automatic exhaust function can be closed, when the protrusion 21 pushes the valve rod 11 to abut against the valve ball 12 and the valve ball 12 is away from the connection position between the valve chamber 13 and the exhaust passage 14 when the automatic exhaust function is closed, thereby achieving manual exhaust to prolong the exhaust time of the exhaust valve, so as to ensure the improvement of the exhaust speed, and shorten the debugging period of exhaust when the hydraulic diaphragm is added to the metering pump.

In the present embodiment, the connection between the valve cavity 13 and the through hole 151 and the connection between the valve cavity 13 and the exhaust passage 14 are both provided with a sealing portion 131, and the valve ball 12 can be attached to the sealing portion 131 and close the valve cavity 13.

As shown in fig. 1 and 2, the sealing portion 131 is a sealing surface disposed at a connection portion between the through hole 151 and the valve chamber 13 and a connection portion between the valve chamber 13 and the exhaust passage 14, and the size of the sealing surface is matched with the size of the valve ball 12, so that the valve chamber 13 can be sealed when the valve ball 12 slides onto the sealing surface, thereby achieving the purpose of closing the valve chamber.

In the present embodiment, an external thread is provided on the outer peripheral surface of the valve body 16, and the external thread is used for screwing the valve body 16 to the pump body.

As shown in fig. 3, a threaded hole is formed in the pump body 3 of the hydraulic diaphragm metering pump, the valve seat 15 is located at the bottom of the threaded hole, and the valve body 16 is in threaded connection with the pump body and is in sealing connection with the valve seat 15, so that the exhaust valve and the hydraulic diaphragm metering pump are stronger in connection strength and convenient to detach and install.

In this embodiment, the manual-automatic exhaust valve further includes a first sealing member 4, the first sealing member 4 is sleeved on one end of the valve body 16, and the first sealing member 4 is used for sealing a gap between the valve body 16 and the pump body.

As shown in fig. 3, the first sealing element 4 is a sealing ring, the first sealing element 4 is sleeved on the periphery of the valve body 16, a boss is arranged on the periphery of the valve body 16, the first sealing element 4 is located below the boss, a groove is formed in the pump body 3 of the hydraulic diaphragm metering pump, the groove is located at the opening of the threaded hole, and the boss abuts against the upper surface of the first sealing element 4 and is matched with the first sealing element 4 to improve the sealing performance of the pump body connected with the valve body 16.

In the present embodiment, the pressing mechanism 2 includes a bonnet 22 and an elastic member 23, the bonnet 22 is fastened above the valve body 16 and can slide in the vertical direction, the elastic member 23 is disposed between the bonnet 22 and the valve body 16, the elastic member 23 provides a reaction force after the bonnet 22 is pressed down, the bonnet 22 has a protruding portion 21 in the middle, and the protruding portion 21 is used for pushing the valve stem 11.

As shown in fig. 1 and 2, the bonnet 22 is a cylindrical member, one end of the valve body 16, which is far away from the hydraulic oil chamber 32, extends into an opening of the cylindrical member, and the cylindrical member is movably connected with the valve body 16, the cylindrical member blocks the possibility that a central passage in the valve body 16 directly faces a user, and further can effectively avoid ejection along the end of the valve body 16 due to an excessive pressure of the hydraulic oil chamber 32, and avoid the situation that the hand and clothes of the user are splashed by hydraulic oil, the bonnet 22 is provided with the protruding portion 21, the end of the protruding portion 21 extends into the valve body 16 and pushes the valve stem 11, the elastic member 23 is coaxially connected with the protruding portion 21 and is located in the bonnet 22, and provides the bonnet 22 with a resilience force after being pressed down.

In the present embodiment, the surface of the end of the valve body 16 is provided with the position-limiting portion 6 corresponding to the bonnet 22, and the inner wall of one end of the bonnet 22 away from the position-limiting portion 6 is provided with the brim 221, and the bonnet 22 can slide between the position-limiting portion 6 and the brim 221.

As shown in fig. 1 and 2, specifically, the end of the valve body 16 movably connected to the bonnet 22 is provided with a horizontal limiting portion 6, the limiting portion 6 is located in the opening of the bonnet 22, the end of the bonnet 22 corresponding to the limiting portion 6 is provided with a blocking eave 221, a certain distance is provided between the limiting portion 6 and the blocking eave 221, the distance is a stroke of pressing down the bonnet 22, the stroke enables the bonnet 22 not to be separated from the end of the valve body 16 when the bonnet rebounds and resets, manual exhaust operation can be performed by pressing the bonnet 22 next time conveniently, and the reuse rate is improved.

In this embodiment, the valve body 16 further includes a second sealing member 5, the second sealing member 5 is a sealing ring, the protruding portion 21 is sleeved with the second sealing member 5, and the second sealing member 5 is used for sealing a gap between the protruding portion 21 and the valve body 16.

As shown in fig. 1 and 2, a mounting groove is formed on an inner wall of the central passage of the valve body 16, the mounting groove is disposed corresponding to the peripheral side of the protruding portion 21, the second sealing member 5 is located in the mounting groove, and when the protruding portion 21 moves or returns to the initial position, the second sealing member 5 is always located corresponding to the peripheral side of the protruding portion 21, so that the sealing property between the protruding portion 21 and the valve body 16 is improved, and hydraulic oil is prevented from leaking along a gap between the protruding portion 21 and the central passage of the valve body 16.

As shown in fig. 3, a hydraulic diaphragm metering pump includes a pump body 3 and a manual-automatic exhaust valve, the manual-automatic exhaust valve is connected above the pump body, the pump body further includes a hydraulic oil chamber 32, and a valve cavity 13 of the manual-automatic exhaust valve is communicated with the hydraulic oil chamber 32.

Specifically, the hydraulic diaphragm metering pump further comprises an exhaust port 35 and a pump head 36, the exhaust port 35 is arranged in the horizontal direction, the exhaust port 35 penetrates through the pump body to a threaded hole for accommodating the manual-automatic exhaust valve, the exhaust port 35 is communicated with an exhaust channel 14 of the manual-automatic exhaust valve, the pump head 36 is connected with the pump body, the diaphragm 37 is located between the hydraulic oil chamber 32 and the pump head 36, the upper end and the lower end of the pump head 36 are connected with one-way valves, the plunger 31 reciprocates to push the hydraulic oil to move and drive the diaphragm 33 to move, the diaphragm 33 moves to pump the fluid 34 into the pump head 36, and the fluid 34 is pumped out of the other end of the pump head 36 through reciprocating movement again; meanwhile, the automatic exhaust and the manual exhaust of the manual-automatic integrated exhaust valve in the environment under the atmospheric pressure are both performed when the pressure of the hydraulic oil chamber 32 in the hydraulic diaphragm metering pump is increased, namely, the exhaust is performed when the plunger 31 is close to the pump head 36.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.

Claims

1. A manual-automatic integrated exhaust valve comprises a valve body, a valve rod and a valve ball, wherein the valve body is provided with a valve cavity, and the valve ball is arranged in the valve cavity;

manual-automatic discharge valve still including:

2. The manual-automatic exhaust valve according to claim 1, wherein the valve body comprises a valve seat and a valve body, the valve seat is detachably connected with the valve body, and the valve seat and the valve body enclose the valve cavity.

3. The manual-automatic integrated exhaust valve according to claim 2, wherein the exhaust passage is arranged inside the valve body, a through hole is arranged on the valve seat, the valve cavity is communicated with a hydraulic oil chamber of the hydraulic diaphragm metering pump through the through hole, and the valve ball can close and open the through hole through sliding.

4. The manual-automatic exhaust valve according to claim 3, wherein a sealing portion is provided at a connection portion between the valve chamber and the through hole and a connection portion between the valve chamber and the exhaust passage, and the valve ball can be attached to the sealing portion and close the valve chamber.

5. The exhaust valve according to claim 2, wherein the valve body has an external thread formed on an outer circumferential surface thereof, and the external thread is used for screwing the valve body to the pump body.

6. The exhaust manual-automatic valve according to claim 2, further comprising a first sealing member, wherein the first sealing member is sleeved on one end of the valve body, and the first sealing member is used for sealing a gap between the valve body and a pump body of the hydraulic diaphragm metering pump.

7. The manual-automatic exhaust valve according to claim 2, wherein said pressing mechanism includes a valve cap and an elastic member, said valve cap is fastened above said valve body and can slide along the vertical direction, said elastic member is disposed between said valve cap and said valve body, said elastic member provides a reaction force after said valve cap is pressed down, said valve cap has a protrusion in the middle portion thereof, said protrusion is used for pushing said valve stem.

8. The manual-automatic exhaust valve according to claim 7, wherein a surface of an end portion of the valve body is provided with a limiting portion corresponding to the valve cap, and an inner wall of an end of the valve cap away from the limiting portion is provided with a blocking ledge, and the valve cap can slide between the limiting portion and the blocking ledge.

9. The exhaust valve according to claim 7, wherein the valve body further comprises a second sealing member, the second sealing member is sleeved on the protrusion, and the second sealing member is used for sealing a gap between the protrusion and the valve body.

10. A hydraulic diaphragm metering pump, characterized in that it comprises a pump body and a manual-automatic integrated exhaust valve according to any one of claims 1-9, the manual-automatic integrated exhaust valve is connected above the pump body, the pump body further comprises a hydraulic oil chamber, and a valve cavity of the manual-automatic integrated exhaust valve is communicated with the hydraulic oil chamber.