Water pump control valve capable of adjusting opening degree of flashboard

Abstract

The utility model provides a water pump control valve capable of adjusting the opening degree of a flashboard. Comprising a valve body, a sliding hole formed in a valve cover and communicated with a piston cylinder, a sliding rod arranged on the valve cover in a sliding mode, a limiting plate arranged at the lower end of the sliding rod, a fixing base arranged at the upper end of the valve cover, a side end open groove formed in the fixing base and at least two corresponding ring holes formed in the sliding rod. The corresponding clamping block is arranged on the fixing base in a sliding mode and located in a side end open groove, the driving inclined face is arranged on the upper end face of the corresponding clamping block, the side end penetrating hole is formed in the side end face of the fixing base, and the releasing rod is arranged on the fixing base in a sliding mode. The pushing spring is arranged between the corresponding clamping block and the fixing seat and located in the side end open groove, and the sealing piece is arranged between the sliding rod and the valve cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to control valve technical field, concretely relates to a water pump control valve of adjustable gate opening. BACKGROUND

[0002] Water pump control valve is a valve controlled by water pressure, and is composed of a main valve and its attached conduits, pilot valves, needle valves, ball valves, pressure gauges and the like. Depending on the use purpose, function and location, it can evolve into remote control floating ball valve, pressure reducing valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic electric control valve and water pump control valve.

[0003] The working principle of the water pump control valve is based on hydraulic automatic control. When the water pump starts, the water pressure enters the lower chamber through the bypass pipe, and the main valve plate and the slow closing valve plate slowly open under the action of the water pressure at the inlet end and the lower chamber, until fully open. When the water pump stops, the flow and pressure suddenly decrease, the main valve plate starts to close under the action of gravity, and then the slow closing valve plate also slowly closes, and finally the valve returns to the initial state when the water pump stops. The characteristics of slow opening when starting and slow closing after fast closing when stopping effectively prevent the occurrence of water hammer phenomenon and protect the safety of the water pump and the pipeline.

[0004] However, the opening of the gate plate in the current water pump control valve is fixed, and the opening of the gate plate cannot be adjusted and controlled according to the demand, so as to reduce or increase the pressure of the water flow out of the water outlet.

[0005] And Chinese patent No. CN201921790966.4 discloses a multifunctional water pump control high pressure valve, which has the technical scheme of comprising a valve body, a water inlet channel and a water outlet channel, a valve seat, a separation disc, a valve cover, a piston cylinder, a movable piston slidingly connected in the piston cylinder, a valve rod, a channel is arranged on the separation disc, a valve clack is arranged at the lower end of the valve rod, the movable piston is fixedly connected with the valve rod, a sliding groove is arranged on the valve cover and penetrates the thickness direction of the valve cover, the lower end of the sliding groove is in communication with the piston cylinder, the valve rod can slide into the sliding groove during movement, a limiting bolt for limiting the upward stroke of the valve rod is screwed in the sliding groove, a return spring is sleeved on the part of the valve rod between the separation disc and the valve clack, the piston cylinder is divided into an upper chamber and a lower chamber by the movable piston, a water inlet pipe and a water outlet pipe are connected to the valve body, and an adjusting valve is arranged on the water outlet pipe and the water inlet pipe. The control high pressure valve can independently control the maximum opening of the main valve.

[0006] Although the above-mentioned patent can control the opening size of the gate plate, it needs to frequently twist the limiting bolt to realize the control process during control, which is difficult to speed up the control speed of the gate plate opening. UTILITY MODEL CONTENTS

[0007] The utility model discloses a water pump control valve of adjustable gate opening degree.

[0008] In order to realize the above-mentioned purpose, the utility model adopts following technical scheme is: a water pump control valve of adjustable gate opening degree, including the valve body, the isolation disc of setting in the valve body top, the valve cover of setting in the isolation disc top, the piston jar of setting between the valve cover and isolation disc, the valve rod of being slidably arranged on the isolation disc and being located in the piston jar and the valve body, the gate of setting in the lower extreme of valve rod, the mobile piston of being slidably arranged in the piston rod and with the upper end fixed connection of valve rod, still including the sliding hole of being opened in the valve cover and with piston jar intercommunication, the sliding rod of being slidably arranged on the valve cover in the sliding hole, and the lower extreme is in the piston jar, and the upper end is in the outside of valve cover, the limiting board of setting in the lower extreme of sliding rod, the fixed seat of setting in the upper end of valve cover, the auxiliary perforation of being opened in the fixed seat and with sliding hole intercommunication, the lateral end slotting of being opened in the fixed seat and with auxiliary perforation intercommunication, at least two corresponding ring holes of being opened in the circumferential side of sliding rod and longitudinal equidistance distribution, the corresponding card block for with corresponding ring hole 14 carding connection of being slidably arranged in the lateral end slotting of fixed seat, the drive slope of setting in the upper end surface of corresponding card block, the lateral end perforation of being opened in the lateral end surface of fixed seat and with lateral end slotting intercommunication, the release rod of being slidably arranged in the lateral end perforation of fixed seat, and one end is set in corresponding card block in lateral end slotting, and the other end is in the outside of fixed seat, the push spring of setting between corresponding card block and fixed seat and in lateral end slotting, the sealing element of setting between sliding rod and valve cover.

[0009] Further improvement is that: the sealing element includes a placement ring groove opened on the valve cover and communicated with the sliding hole, an annular groove longitudinally arranged on the circumferential side of the sliding rod, and a sealing ring arranged in the placement ring groove and abutting against the annular groove.

[0010] Further improvement is that: the upper end surface of the valve cover is provided with a telescopic motor at the end of the release rod, the fixed end of the telescopic motor is fixedly arranged on the valve cover, the output end of the telescopic motor is provided with a push plate, the other end of the release rod is provided with a contact plate, and the release plate abuts against the push plate.

[0011] Further improvement is that: the push plate is provided with an avoiding perforation for the release rod to pass through the push plate, the lower end left side of the push plate is fixedly connected with the output end of the telescopic motor, and the upper end of the push plate is slidably connected with the release rod through the avoiding perforation.

[0012] Further improvement is that: the lower end surface of the limiting plate is provided with a buffer mechanism.

[0013] Further improvement is that the buffer mechanism comprises at least two buffer sliding holes formed in the lower end face of the limiting plate, at least two buffer sliding blocks slidably arranged on the limiting plate and located in the buffer sliding holes, buffer plates arranged on the lower end face of the buffer sliding blocks, and buffer springs arranged between the upper end of the buffer sliding blocks and the limiting plate and located in the buffer sliding holes.

[0014] Further improvement is that the limiting plate is provided with a anti-disengagement hole, the anti-disengagement hole is communicated with the buffer sliding hole, the limiting plate is provided with an anti-disengagement sliding rod in the anti-disengagement hole, the lower end face of the anti-disengagement sliding rod is fixedly arranged on the upper end face of the buffer sliding block, and the upper end face of the anti-disengagement sliding rod is provided with an anti-disengagement plate, the anti-disengagement plate is located above the limiting plate, and the diameter of the anti-disengagement plate is greater than that of the anti-disengagement hole.

[0015] After the technical scheme is adopted, the gate opening degree can be reduced by pushing the sliding rod towards the valve body with the hand, the limiting plate is driven to move towards the end of the moving piston in the sliding hole, the corresponding ring hole is extruded against the driving slope in the sliding process of the sliding rod, the corresponding clamping block is driven to move away from the end of the sliding rod in the corresponding slot, the pushing spring is compressed to generate elastic deformation, the corresponding clamping block is driven to move towards the end of the sliding rod to be inserted into the corresponding ring hole for clamping cooperation when the subsequent corresponding ring hole corresponds to the side end slot, the corresponding clamping block is in abutment with the corresponding ring hole, the upward movement of the sliding rod is limited, the distance between the limiting plate and the moving piston is shortened, and the gate opening degree is reduced.

[0016] When the gate opening degree needs to be expanded, the corresponding clamping block is driven to move away from the end of the sliding rod in the corresponding slot by continuously pulling the release rod outward with the hand, the sliding rod is pulled upward to drive the limiting plate to move away from the end of the piston, the pulling step of the release rod by the hand is removed, the corresponding clamping block is driven to move towards the end of the sliding rod to be inserted into the corresponding ring hole for clamping cooperation when the subsequent corresponding ring hole corresponds to the side end slot, the distance between the limiting plate and the moving piston is increased, the gate opening degree is increased, the size of the gate opening degree can be controlled without frequently twisting the bolt, and the control speed of the gate opening degree can be accelerated.

[0017] Further effect is that the sealing ring is kept at the same position by the position of the placement ring groove when the sliding rod is lifted up and down in the sliding hole, and the annular groove slides on the inner side of the sealing ring, so that the sealing effect is kept when the sliding rod is lifted up and down by the sealing ring, and the sealing ring is prevented from slipping off due to the lifting action of the sliding rod.

[0018] Further effect: the pushing spring keeps pushing the corresponding clamping block to the end of the sliding rod, so that the left end surface of the contact plate is continuously abutted against the right end surface of the pushing plate through the release rod, when the output end of the telescopic motor is pushed out, the pushing plate drives the contact plate to move away from the fixed seat, so that the corresponding clamping block moves away from the end of the sliding rod through the release rod.

[0019] Further effect: the right end surface of the pushing plate can be completely abutted against the left end surface of the contact plate through the avoidance of the perforation, so that the contact plate can more effectively drive the release rod to move when the output end of the telescopic motor is extended, and the left end surface of the contact plate is attached to the right end surface of the pushing plate when the output end of the telescopic motor is retracted.

[0020] Further effect: when the valve rod drives the moving piston to rise and is limited by the contact with the limiting plate, the buffer plate first contacts the upper end surface of the moving piston, and the buffer block moves upward and compresses the buffer spring as the buffer plate is pushed by the moving piston, so that the buffer spring is elastically deformed to buffer the impact force of the buffer plate.

[0021] Further effect: the anti-slip rod and the anti-slip plate can prevent the buffer block from being pushed out of the buffer sliding hole by the elastic potential energy released by the buffer spring, and can limit the buffer block. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is a structural schematic diagram of the present application;

[0024] Figure 2 is a cross-sectional view of the valve cover, the sliding rod and the fixed seat in the present application;

[0025] Figure 3 is an enlarged view of A part of the corresponding Figure 2 ;

[0026] Figure 4 is an enlarged view of B part of the corresponding Figure 2 ;

[0027] Figure 5 is an enlarged view of C part of the corresponding Figure 2 ;

[0028] Figure 6 is an enlarged view of D part of the corresponding Figure 2Enlarged view of portion D.

[0029] Explanation of reference signs: valve body 1, isolation disc 2, valve cover 3, piston cylinder 4, valve rod 5, gate plate 6, moving piston 7, sliding hole 8, sliding rod 9, limiting plate 10, auxiliary perforation 12, side end slot 13, corresponding ring hole 14, corresponding clamping block 15, driving slope 16, side end perforation 17, release rod 18, pushing spring 19, placement ring slot 20, annular groove 21, sealing ring 22, telescopic motor 23, pushing plate 24, contact plate 25, avoidance perforation 26, buffer sliding hole 27, buffer sliding block 28, buffer plate 29, buffer spring 30, anti-falling opening 31, anti-falling sliding rod 32, anti-falling plate 33. DETAILED DESCRIPTION

[0030] The utility model will be further explained in connection with the drawings and specific embodiments.

[0031] Reference Figures 1 to 6 As shown in the drawings, the technical scheme adopted in the specific embodiment is: a water pump control valve capable of adjusting the opening degree of a gate plate 6, comprising a valve body 1, an isolation disc 2 arranged on the top of the valve body 1, a valve cover 3 arranged on the top of the isolation disc 2, a piston cylinder 4 arranged between the valve cover 3 and the isolation disc 2, a valve rod 5 slidably arranged on the isolation disc 2 and located in the piston cylinder 4 and the valve body 1, a gate plate 6 arranged on the lower end of the valve rod 5, a moving piston 7 slidably arranged in the piston rod and fixedly connected with the upper end of the valve rod 5, further comprising a sliding hole 8 opened on the valve cover 3 and communicating with the piston cylinder 4, a sliding rod 9 slidably arranged on the valve cover 3 and located in the sliding hole 8, with the lower end located in the piston cylinder 4 and the upper end located outside the valve cover 3, a limiting plate 10 arranged on the lower end of the sliding rod 9, a fixed seat 11 arranged on the upper end of the valve cover 3, an auxiliary perforation 12 opened on the fixed seat 11 and communicating with the sliding hole 8, a side end slot 13 opened on the fixed seat 11 and communicating with the auxiliary perforation 12, at least two corresponding ring holes 14 opened on the circumferential side of the sliding rod 9 and longitudinally equidistantly distributed, a corresponding clamping block 15 slidably arranged on the fixed seat 11 and located in the side end slot 13, used for clamping connection with the corresponding ring hole 14, a driving slope 16 arranged on the upper end face of the corresponding clamping block 15, a side end perforation 17 opened on the side end face of the fixed seat 11 and communicating with the side end slot 13, a release rod 18 slidably arranged on the fixed seat 11 and located in the side end perforation 17, with one end arranged on the corresponding clamping block 15 and located in the side end slot 13 and the other end located outside the fixed seat 11, a pushing spring 19 arranged between the corresponding clamping block 15 and the fixed seat 11 and located in the side end slot 13, and a sealing element arranged between the sliding rod 9 and the valve cover 3.

[0032] The valve body 1, the isolation disc 2, the valve cover 3, the piston rod, the valve rod 5, the shutter 6 and other components have been described in Chinese Patent No. CN201921790966.4, and will not be repeated here; the sliding hole 8 is provided with a through hole, and the sliding hole 8 and the sliding rod 9 are in clearance fit, the shape of the sliding hole 8 and the shape of the sliding rod 9 are both circular; the length or diameter of the limiting plate 10 is greater than the diameter of the sliding hole 8; the sliding rod 9 and the auxiliary through hole 12 are in clearance fit; the setting direction of the side end slot 13 is perpendicular to the setting direction of the auxiliary through hole 12, and the setting number of the side end slot 13 is only one; the corresponding ring hole 14 is annularly arranged on the side of the sliding rod 9, the height of the corresponding ring hole 14 is greater than the height of the corresponding clamping block 15, and the two are in clearance fit, the lower end face of the corresponding clamping block 15 is a horizontal plane; the side end through hole 17 is arranged at the opposite position of the side end slot 13; the diameter of the release rod 18 is smaller than the size of the corresponding clamping block 15, the corresponding clamping block 15 is a square block, and the release rod 18 can also be a circular rod or a square rod; the push spring 19 is a compression spring.

[0033] The sealing member includes a placement ring groove 20 opened on the valve cover 3 and in communication with the sliding hole 8, an annular groove 21 longitudinally arranged on the side of the sliding rod 9, and a sealing ring 22 arranged in the placement ring groove 20 and abutting against the annular groove 21.

[0034] The upper end face of the valve cover 3 is provided with a telescopic motor 23 at the end of the release rod 18, the fixed end of the telescopic motor 23 is fixedly arranged on the valve cover 3, the output end of the telescopic motor 23 is provided with a push plate 24, the other end of the release rod 18 is provided with a contact plate 25, and the release plate abuts against the push plate 24.

[0035] The push plate 24 is provided with an avoidance through hole 26 for the release rod 18 to pass through the push plate 24, the lower end left side of the push plate 24 is fixedly connected with the output end of the telescopic motor 23, and the upper end of the push plate 24 is in sliding fit with the release rod 18 through the avoidance through hole 26.

[0036] The lower end face of the limiting plate 10 is provided with a buffer mechanism.

[0037] The buffer mechanism comprises at least two buffer sliding holes 27 formed in the lower end face of the limiting plate 10, at least two buffer sliding blocks 28 slidably arranged on the limiting plate 10 and located in the buffer sliding holes 27, buffer plates 29 arranged on the lower end faces of the buffer sliding blocks 28, and buffer springs 30 arranged between the upper ends of the buffer sliding blocks 28 and the limiting plate 10 and located in the buffer sliding holes 27. The buffer sliding holes 27 and the buffer sliding blocks 28 are in clearance fit, the number of the buffer sliding holes 27 is two or more, when the number of the buffer sliding holes 27 is two, the two buffer sliding holes 27 are symmetrically formed on both sides of the lower end of the limiting plate 10, and when a plurality of buffer sliding holes 27 are arranged, the plurality of buffer sliding holes 27 are equidistantly arranged on the lower end of the limiting plate 10.

[0038] The limiting plate 10 is provided with a anti-disengagement hole 31, the anti-disengagement hole 31 is communicated with the buffer sliding hole 27, the limiting plate 10 is provided with an anti-disengagement sliding rod 32 in the anti-disengagement hole 31, the lower end face of the anti-disengagement sliding rod 32 is fixedly arranged on the upper end face of the buffer sliding block 28, the upper end face of the anti-disengagement sliding rod 32 is provided with an anti-disengagement plate 33, the anti-disengagement plate 33 is located above the limiting plate 10, and the diameter of the anti-disengagement plate 33 is greater than that of the anti-disengagement hole 31. The diameter of the anti-disengagement hole 31 is smaller than that of the buffer sliding hole 27, the buffer spring 30 is sleeved on the outer side of the anti-disengagement sliding rod 32, and the buffer spring 30 is a compression spring. In the case that the anti-disengagement hole 31, the anti-disengagement sliding rod 32 and the anti-disengagement plate 33 are not arranged, the buffer spring 30 is fixedly arranged between the upper end of the buffer sliding block 28 and the limiting plate 10 by welding or bonding.

[0039] The working principle of the utility model is as follows: when the opening of the gate plate 6 needs to be reduced, the sliding rod 9 is pushed to the direction of the valve body 1 by hand, the limiting plate 10 is driven to move to the end of the moving piston 7 in the sliding hole 8, the corresponding ring hole 14 is extruded with the driving inclined surface 16 in the sliding process of the sliding rod 9, so that the corresponding clamping block 15 is pushed away from the end of the sliding rod 9 in the corresponding slot, the driving spring 19 is compressed to produce elastic deformation, when the subsequent corresponding ring hole 14 corresponds to the side end slot 13, the driving spring 19 releases the elastic potential energy to push the corresponding clamping block 15 to move to the end of the sliding rod 9, so that the corresponding clamping block 15 is inserted into the corresponding ring hole 14 to be clamped, at this time, the horizontal plane of the lower end of the corresponding clamping block 15 and the corresponding ring hole 14 are abutted, so as to limit the upward movement of the sliding rod 9, and the opening of the gate plate 6 is reduced by shortening the distance between the limiting plate 10 and the moving piston 7.

[0040] When the opening of the gate plate 6 needs to be expanded, the release lever 18 is continuously pulled outward by hand to drive the corresponding clamping block 15 to slide away from the sliding rod 9 end in the corresponding slot, at this time the sliding rod 9 is pulled up to drive the limiting plate 10 to move away from the piston end, and the pulling step of the release lever 18 by the hand is removed, when the corresponding ring hole 14 is corresponding to the side end slot 13, the elastic potential energy of the push spring 19 is released to push the corresponding clamping block 15 to move close to the sliding rod 9 end, so that the corresponding clamping block 15 is inserted into the corresponding ring hole 14 for clamping cooperation, the distance between the limiting plate 10 and the moving piston 7 is increased to improve the opening of the gate plate 6, and the opening control size process of the gate plate 6 can be completed without frequent screwing of the bolt, and the control speed of the opening of the gate plate 6 can be accelerated.

[0041] When the sliding rod 9 is lifted in the sliding hole 8, the sealing ring 22 is kept in the same position by the position of the placement ring groove 20, and the annular groove 21 slides on the inside of the sealing ring 22, so that the sealing effect is maintained when the sliding rod 9 is lifted by the sealing ring 22, and the sealing ring 22 is prevented from slipping due to the lifting action of the sliding rod 9;

[0042] The push spring 19 keeps pushing the corresponding clamping block 15 to move close to the sliding rod 9 end, so that the left end surface of the contact plate 25 continuously abuts against the right end surface of the push plate 24 through the release lever 18, and when the output end of the telescopic motor 23 is pushed out, the push plate 24 drives the contact plate 25 to move away from the fixed seat 11, so that the corresponding clamping block 15 is driven to move away from the sliding rod 9 end through the release lever 18;

[0043] The avoidance of the through hole 26 allows the right end surface of the push plate 24 to completely abut against the left end surface of the contact plate 25, so that the contact plate 25 can be more effectively pushed to move the release lever 18 when the output end of the telescopic motor 23 is extended, and the left end surface of the contact plate 25 is attached to the right end surface of the push plate 24 when the output end of the telescopic motor 23 is retracted;

[0044] When the valve rod 5 drives the moving piston 7 to rise and contact the limiting plate 10 to limit, the buffer plate 29 first contacts the upper end surface of the moving piston 7, and as the buffer plate 29 is pushed by the moving piston 7, the buffer sliding block 28 moves upward and compresses the buffer spring 30, and the buffer spring 30 is elastically deformed to buffer the impact force of the buffer plate 29;

[0045] The setting of the anti-slip rod 32 and the anti-slip plate 33 can prevent the buffer sliding block 28 from being pushed out of the buffer sliding hole 27 by the elastic potential energy released by the buffer spring 30, and can limit the buffer sliding block 28.

[0046] The utility model wants to protect is the structure of product, the model of each element is not the content of the utility model protection, is also the known art, the element of market as long as can realize the above-mentioned function of the utility model can be as a kind of adjustable gate opening water pump control valve selection application. Therefore the model of element and so on parameter is not detailed in the utility model. The contribution of the utility model is that each element is combined scientifically together.

[0047] The basic principle and main features of the utility model and its advantages are shown and described above, and those skilled in the art should understand that the utility model is not limited by the above examples. The above examples and descriptions are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements. These changes and improvements fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents. The utility model not detailed is the known technology of those skilled in the art.

Claims

1. A water pump control valve with adjustable gate opening, comprising a valve body, an isolation disc disposed on the top of the valve body, a valve cover disposed on the top of the isolation disc, a piston cylinder disposed between the valve cover and the isolation disc, a valve stem slidably disposed on the isolation disc and located within the piston cylinder and the valve body, a gate plate disposed at the lower end of the valve stem, and a movable piston slidably disposed within the piston rod and fixedly connected to the upper end of the valve stem, characterized in that: The valve cover further comprises a sliding hole formed in the valve cover and communicating with the piston cylinder, a sliding rod slidably arranged in the sliding hole of the valve cover and located in the piston cylinder with the lower end and located outside the valve cover with the upper end, a limiting plate arranged at the lower end of the sliding rod, a fixed seat arranged at the upper end of the valve cover, an auxiliary perforation formed in the fixed seat and communicating with the sliding hole, a side end slot formed in the fixed seat and communicating with the auxiliary perforation, at least two corresponding ring holes formed in the circumferential side of the sliding rod and longitudinally equidistantly distributed, a corresponding clamping block slidably arranged in the side end slot of the fixed seat and used for clamping connection with the corresponding ring hole, a driving slope arranged at the upper end surface of the corresponding clamping block, a side end perforation formed in the side end surface of the fixed seat and communicating with the side end slot, a release rod slidably arranged in the side end perforation of the fixed seat and located in the side end slot with one end arranged on the corresponding clamping block and located outside the fixed seat with the other end, a pushing spring arranged between the corresponding clamping block and the fixed seat and located in the side end slot, and a sealing element arranged between the sliding rod and the valve cover.

2. A pump control valve with adjustable gate opening according to claim 1, characterized in that: The sealing element comprises a placement ring groove formed in the valve cover and communicating with the sliding hole, and an annular groove formed in the circumferential side of the sliding rod and longitudinally arranged, and a sealing ring arranged in the placement ring groove and abutting against the annular groove.

3. A pump control valve with adjustable gate opening according to claim 1, characterized in that: The upper end surface of the valve cover is provided with a telescopic motor at the end of the release rod, the fixed end of the telescopic motor is fixedly arranged on the valve cover, the output end of the telescopic motor is provided with a pushing plate, the other end of the release rod is provided with a contact plate, and the contact plate abuts against the pushing plate.

4. A pump control valve with adjustable gate opening according to claim 3, characterized in that: The pushing plate is provided with an avoiding perforation for the release rod to pass through the pushing plate, the lower end left side of the pushing plate is fixedly connected with the output end of the telescopic motor, and the upper end of the pushing plate is slidably connected with the release rod through the avoiding perforation.

5. The adjustable vane pump control valve of claim 1, wherein: The lower end surface of the limiting plate is provided with a buffer mechanism.

6. A pump control valve with adjustable gate opening according to claim 5, characterized in that: The buffer mechanism comprises at least two buffer sliding holes formed in the lower end surface of the limiting plate, at least two buffer sliding blocks slidably arranged on the limiting plate and located in the buffer sliding holes, a buffer plate arranged at the lower end surface of each buffer sliding block, and a buffer spring arranged between the upper end of each buffer sliding block and the limiting plate and located in the buffer sliding hole.

7. A pump control valve with adjustable gate opening according to claim 6, characterized in that: The limiting plate is provided with a anti-falling open hole, the anti-falling open hole communicates with the buffer sliding hole, the limiting plate is provided with an anti-falling sliding rod located in the anti-falling open hole, the lower end surface of the anti-falling sliding rod is fixedly arranged on the upper end surface of the buffer sliding block, the upper end surface of the anti-falling sliding rod is provided with an anti-falling plate, the anti-falling plate is located above the limiting plate, and the diameter of the anti-falling plate is greater than the diameter of the anti-falling open hole.

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