CN218207015U - Hydraulic oil automatic compensation device for hydraulic diaphragm metering pump - Google Patents

Abstract

The utility model relates to a hydraulic oil automatic compensation arrangement for hydraulic pressure diaphragm measuring pump. Is characterized in that a limit valve and a one-way valve are arranged in the pump body, and the limit valve and the one-way valve are matched to act to realize automatic oil supplement. The utility model discloses installation ability automatic re-setting's spacing case in the middle of the pump body, restriction diaphragm's disturbing song displacement distance, with the reason through the disturbing song displacement that has the medium of pressure to promote the diaphragm, make spacing case remove and open hydraulic oil automatic compensation passageway to open the check valve of installing in pump body downside under the effect of negative pressure (hydraulic pressure chamber volume increase, produce the negative pressure), accomplish the compensation of hydraulic oil rapidly.

Description

Hydraulic oil automatic compensation device for hydraulic diaphragm metering pump

Technical Field

The utility model relates to a hydraulic oil automatic compensation arrangement for hydraulic pressure diaphragm measuring pump.

Background

The hydraulic diaphragm metering pump applies work in the hydraulic cylinder by means of power of reciprocating motion of the plunger, and the work is transmitted to the diaphragm through hydraulic oil in the hydraulic cylinder to promote the diaphragm to make flexural displacement in the diaphragm cavity (a hydraulic cavity and a medium cavity) so as to convey a medium. And the hydraulic oil in the hydraulic pressure chamber can produce the leakage in plunger reciprocating motion to can discharge partial hydraulic oil through the relief valve when hydraulic pressure chamber pressure exceedes the limit, hydraulic oil will slowly reduce in the hydraulic pressure chamber like this, therefore must compensate the hydraulic oil in the hydraulic pressure chamber, and both guarantee the fullness of the hydraulic oil in the hydraulic pressure chamber, avoid hydraulic oil compensation excessive.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model aims to provide a hydraulic oil automatic compensation arrangement's for hydraulic pressure diaphragm metering pump technical scheme.

The hydraulic oil automatic compensation device for the hydraulic diaphragm metering pump is characterized in that a limit valve and a one-way valve are arranged in the pump body and cooperate to realize automatic oil compensation; the limiting valve consists of a valve sleeve, a limiting valve core and a spring, the valve sleeve is arranged on the pump body, the limiting valve core is arranged in the valve sleeve, the spring is sleeved on the limiting valve core, the left end of the spring is limited by the valve sleeve, the right end of the spring is limited by a limiting block at the right end of the limiting valve core, a first diversion hole is arranged on the valve sleeve, a second diversion hole and a third diversion hole which are communicated are arranged on the limiting valve core, the first diversion hole and the second diversion hole can be communicated when the limiting valve core moves leftwards for a certain distance, and the limiting block at the right end of the limiting valve core can be in contact fit with the diaphragm; the check valve is arranged in the vertical direction of the limit valve, a fourth flow guide hole is formed in the check valve and communicated with a fifth flow guide hole in the pump body, and the fifth flow guide hole is communicated with an oil tank in the pump body.

The hydraulic oil automatic compensation device for the hydraulic diaphragm metering pump is characterized in that a first check ring is arranged at a position, extending out of a pump body, of the left end of the valve sleeve, and the first check ring limits the valve sleeve; and a second retaining ring is arranged at the position, extending out of the valve sleeve, of the left end of the limiting valve core, and the second retaining ring is used for limiting the limiting valve core.

The hydraulic oil automatic compensation device for the hydraulic diaphragm metering pump is characterized in that a first sealing ring and a second sealing ring are arranged between the valve sleeve and the pump body, and the first sealing ring and the second sealing ring are respectively arranged on two sides of the first flow guide hole.

The hydraulic oil automatic compensation device for the hydraulic diaphragm metering pump is characterized in that the diameter of the limiting block is larger than that of the valve sleeve.

The hydraulic oil automatic compensation device for the hydraulic diaphragm metering pump is characterized in that a limiting block is provided with a guide groove.

The utility model discloses installation ability automatic re-setting's spacing case in the middle of the pump body, restriction diaphragm's disturbing song displacement distance, with the reason through the disturbing song displacement that has the medium of pressure to promote the diaphragm, make spacing case remove and open hydraulic oil automatic compensation passageway to open the check valve of installing in pump body downside under the effect of negative pressure (hydraulic pressure chamber volume increase, produce the negative pressure), accomplish the compensation of hydraulic oil rapidly.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic diagram of hydraulic oil flowing during the hydraulic oil compensation operation of the present invention;

in the figure: 1-a plunger; 2-a hydraulic cylinder; 3-limiting valve core; 4-a third flow guide hole; 5-a second retainer ring; 6-valve sleeve; 7-a first collar; 8-a first sealing ring; 9-a sixth diversion hole; 10-a second sealing ring; 11-a second diversion hole; 12-a spring; 13-diversion trench; 14-a membrane; 15-a pump head; 16-a first flow guiding hole; 17-a seventh flow guide hole; 18-a one-way valve; 19-a pump body; 20-a fifth diversion hole; 21-a media cavity; 22-a hydraulic chamber; 23-fourth flow guiding holes.

Detailed Description

The invention will be further explained with reference to the drawings in the following description:

the utility model provides a hydraulic oil automatic compensation arrangement for hydraulic pressure diaphragm measuring pump, diaphragm and pump head are installed in proper order to the pump body right side of measuring pump, and hydraulic cylinder and plunger are installed in proper order to pump body left side, and the right side of diaphragm forms the medium chamber, and the left side of diaphragm forms inclosed hydraulic pressure chamber, sets up limit valve and check valve in the pump body, and limit valve and check valve cooperation action realize automatic oil supplementation.

The utility model discloses a limit valve comprises valve barrel, limit valve core and spring, the valve barrel sets up on the pump body, the limit valve core sets up in the valve barrel, the spring cup joints and sets up on the limit valve core, the spring left end is spacing by the valve barrel, the spring right-hand member is spacing by the stopper of limit valve core right-hand member, set up first water conservancy diversion hole on the valve barrel, set up the second water conservancy diversion hole and the third water conservancy diversion hole of intercommunication on the limit valve core, first water conservancy diversion hole and second water conservancy diversion hole can communicate when the limit valve core moves a certain distance to the left, the stopper of limit valve core right-hand member can contact with the diaphragm and cooperate; the diameter of the limiting block is larger than that of the valve sleeve, so that the limiting valve core is prevented from being separated from the valve sleeve leftwards, the limiting block can be provided with a diversion trench, and the hydraulic oil in the hydraulic cavity is ensured to be consistent in pressure.

The utility model discloses a check valve sets up the vertical direction at the limit valve, sets up fourth water conservancy diversion hole on the check valve, and fifth water conservancy diversion hole on fourth water conservancy diversion hole and the pump body communicates, and fifth water conservancy diversion hole communicates with the oil tank of the pump body.

In order to ensure that the valve sleeve and the limiting valve core cannot move rightwards, a first check ring 7 is arranged at the position, extending out of the pump body, of the left end of the valve sleeve, the valve sleeve is limited through the first check ring, a second check ring 5 is arranged at the position, extending out of the valve sleeve, of the left end of the limiting valve core, and the limiting valve core is limited through the second check ring.

In order to ensure the sealing performance of the valve sleeve, a first sealing ring 8 and a second sealing ring 10 are arranged between the valve sleeve and the pump body, and the first sealing ring and the second sealing ring are respectively arranged on two sides of the first flow guide hole, so that the sealing reliability is ensured.

The compensation amount of the hydraulic oil is mainly determined by the following aspects of 1, limiting the distance between the large end surface (limiting block) of the valve core and the diaphragm; 2. limiting the movable distance of the valve core; 3. the spring force of the automatic return spring; 4. the opening force of the one-way valve of the hydraulic oil automatic compensation device. The utility model discloses a water conservancy diversion hole size and position, automatic re-setting spring specification and hydraulic oil automatic compensation device check valve's application is solved in the length of spacing case, spacing case and the valve barrel.

The specific installation process is as follows: the first sealing ring 8 and the second sealing ring 10 are arranged in corresponding sealing ring grooves of the valve sleeve 6, the spring 12 is arranged in the valve sleeve 6, the limiting valve core 3 is arranged in the valve sleeve 6, and the second sealing ring 5 is arranged in a retaining ring groove of the limiting valve core 3 to limit the moving distance of the limiting valve core 3 in the valve sleeve 6; the assembly of the limiting valve core 3 and the valve sleeve 6 is arranged in the middle of the pump body 19, and then the first check ring 7 is arranged in the check ring groove of the valve sleeve 6, so that the valve sleeve 6 is fixed in the pump body 19; the check valve 18 is mounted on the underside of the pump body 19.

According to the figure 1, a diaphragm 14 and a pump head 15 are sequentially arranged on the right side of a pump body 19, and a hydraulic cylinder 2 and a plunger 1 are sequentially arranged on the left side of the pump body 19, so that a medium cavity 21 is formed on the right side of the diaphragm, and a sealed 22 hydraulic cavity is formed on the left side of the diaphragm.

A mounting hole of the valve sleeve 6 and a sixth flow guide hole 9 are processed in the middle of the pump body 19, a seventh flow guide hole 17 and a mounting hole of a one-way valve 18 are processed on the lower side of the pump body 19, and a fifth flow guide hole 20 is processed on the lower side of the left end face of the pump body 19 and serves as a hydraulic oil inlet; the valve sleeve 6 is provided with a first diversion hole 16; the limiting valve core 3 is provided with a third diversion hole 4, a second diversion hole 11 and a diversion trench 13; the second diversion hole 11 on the limiting valve core 3 is not communicated with the first diversion hole 16 on the valve sleeve 6 in a free state, so that the tightness of a hydraulic cavity is ensured; the distance between the edge of the second diversion hole 11 and the edge of the first diversion hole 16 is A, which is the opening distance of the hydraulic oil automatic compensation channel, and the limiting valve core 3 can be opened only when the moving distance in the valve sleeve 6 is greater than A.

When the hydraulic diaphragm metering pump is in fluid suction, namely the plunger 1 runs away from the diaphragm 14, the volume of the hydraulic cavity 22 is increased to generate negative pressure, meanwhile, because the pressure medium pushes the deflection displacement of the diaphragm 14, the diaphragm 14 pushes the limiting block of the limiting valve core 3 to move, when the moving distance is greater than A, the second flow guide hole 11 on the limiting valve core 3 is communicated with the first flow guide hole 16 on the valve sleeve 6 to open a hydraulic oil automatic compensation channel, and the one-way valve 18 of the hydraulic oil automatic compensation device is opened under the action of negative pressure, so that hydraulic oil in the oil tank sequentially passes through the fifth flow guide hole 20, the fourth flow guide hole 23, the seventh flow guide hole 17 in the pump body 19, the first flow guide hole 16 on the valve sleeve 6, the second flow guide hole 11 on the limiting valve core 3 and the third flow guide hole 4 to enter the hydraulic cavity 22 as shown in fig. 2, and the compensation of the hydraulic oil is completed; if the hydraulic cavity is full of hydraulic oil, the two sides of the diaphragm 14 are stressed in balance, the moving distance of the limiting valve core 3 in the valve sleeve 6 is smaller than A, the second diversion hole 11 on the limiting valve core 3 is not communicated with the first diversion hole 16 on the valve sleeve 6, and the hydraulic oil automatic compensation channel is not opened; when the hydraulic diaphragm metering pump discharges liquid, namely when the plunger 1 runs towards the direction of the diaphragm 14, the limiting valve core 3 is rapidly reset under the combined action of the spring 12 and the force of the plunger to close a hydraulic oil automatic compensation channel formed between the second flow guide hole 11 on the limiting valve core 3 and the first flow guide hole 16 on the valve sleeve 6, and meanwhile, the check valve 18 is also rapidly reset under the action of the spring force of the check valve 18 to keep a free state, namely a normally closed state, so that the hydraulic oil compensation channel is closed and hydraulic oil compensation is not performed any more; therefore, the fullness of the hydraulic oil in the hydraulic cavity is ensured, excessive compensation of the hydraulic oil is avoided, and hydraulic impact is prevented, so that the stress on two sides of the diaphragm is balanced, and the service life of the diaphragm is prolonged.

Claims (5)

1. A hydraulic oil automatic compensation device for a hydraulic diaphragm metering pump is characterized in that a limit valve and a check valve are arranged in the pump body and cooperate to realize automatic oil compensation; the limiting valve consists of a valve sleeve, a limiting valve core and a spring, the valve sleeve is arranged on the pump body, the limiting valve core is arranged in the valve sleeve, the spring is sleeved on the limiting valve core, the left end of the spring is limited by the valve sleeve, the right end of the spring is limited by a limiting block at the right end of the limiting valve core, a first diversion hole is formed in the valve sleeve, a second diversion hole and a third diversion hole which are communicated with each other are formed in the limiting valve core, the first diversion hole and the second diversion hole can be communicated with each other when the limiting valve core moves leftwards for a certain distance, and the limiting block at the right end of the limiting valve core can be in contact fit with the diaphragm; the check valve is arranged in the vertical direction of the limit valve, a fourth flow guide hole is formed in the check valve and communicated with a fifth flow guide hole in the pump body, and the fifth flow guide hole is communicated with an oil tank in the pump body.

2. The automatic hydraulic oil compensation device for the hydraulic diaphragm metering pump as recited in claim 1, wherein a first check ring is disposed at a position where the left end of the valve sleeve extends out of the pump body, and the first check ring limits the valve sleeve; and a second retaining ring is arranged at the position, extending out of the valve sleeve, of the left end of the limiting valve core, and the second retaining ring is used for limiting the limiting valve core.

3. The automatic hydraulic oil compensation device for the hydraulic diaphragm metering pump as recited in claim 1, wherein a first sealing ring and a second sealing ring are disposed between the valve housing and the pump body, and the first sealing ring and the second sealing ring are disposed on two sides of the first diversion hole respectively.

4. The automatic hydraulic oil compensation device for the hydraulic diaphragm metering pump as recited in claim 1, wherein the diameter of the stopper is larger than that of the valve sleeve.

5. The automatic hydraulic oil compensation device for the hydraulic diaphragm metering pump according to claim 4, wherein the limiting block is provided with a guide groove.

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