High pressure hydraulic diaphragm pump with high pressure resistant or vacuum resistant inlet

Abstract

A high-pressure hydraulic diaphragm pump with an inlet resistant to high pressure or vacuum includes a pump head, a pump body, and a drive assembly. The pump body houses a diaphragm assembly and a reset mechanism for forced reset of the diaphragm assembly. The pump body also includes an integrated oil replenishment and exhaust valve, which has an exhaust flow channel and an oil replenishment flow channel to achieve simultaneous oil replenishment and exhaust. The pump body also includes an adjustable pressure relief valve, which includes a pressure relief valve body, a pressure relief chamber, a pressure relief valve core, and an adjustment component. The adjustment component adjusts the pressure of the pressure relief valve core against the port of the first hydraulic chamber, thereby adjusting the pressure relief threshold. This invention uses a spring on the diaphragm rod to provide a push force to the diaphragm rod, thus overcoming the high pressure difference. The use of multiple diaphragms and limiting components makes the diaphragm less prone to fatigue damage. The hydraulic valve allows for integrated oil replenishment and exhaust, with no interference between the replenishment and exhaust paths. The pressure relief threshold can be adjusted simply by rotating the pressure relief valve, making the process simple and convenient.

Description

Technical Field

[0001] This invention belongs to the field of diaphragm pump technology, specifically relating to a high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum. Background Technology

[0002] Diaphragm pumps are a common type of positive displacement reciprocating pump. They completely isolate the medium from the drive end through a diaphragm and are widely used in chemical, pharmaceutical, and petrochemical industries. However, as industrial production upgrades towards precision and high-end, conventional diaphragm pumps can no longer meet the needs of some special working conditions, especially in the case of micro-flow transportation under high pressure or vacuum environments, such as feeding micro-catalysts into high-pressure reactors, high-pressure micro-flow circulation in laboratories, and transporting high-pressure liquefied gases. In such special working conditions, the diaphragm is prone to fatigue damage, and the large pressure difference can also make it difficult for the diaphragm and plunger to reciprocate, affecting the stability of the transportation.

[0003] On the other hand, existing diaphragm pump components, such as pressure relief valves and hydraulic valves, also need to be improved to meet the growing demands of industrial production. Existing pressure relief valves usually have their pressure relief determined after the diaphragm pump leaves the factory, requiring complete replacement and adjustment, a cumbersome and inefficient process. In addition, during the reciprocating movement of the plunger, some hydraulic oil emulsifies, forming small droplets or oil-gas mixtures, which need to be discharged in time. However, existing hydraulic valves are usually only used to control the flow direction and flow rate of hydraulic oil and do not have a venting function. Venting is required through a special venting port, a process that requires frequent and regular operation and is difficult to achieve in a timely manner. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide a high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum. A spring mounted on the diaphragm rod provides a thrust during the reciprocating movement of the diaphragm rod, thereby overcoming the obstruction of the high pressure differential on the diaphragm assembly. The diaphragm assembly, through the arrangement of multiple diaphragms and limiting components, prevents fatigue damage to the diaphragm during reciprocating movement. The hydraulic valve can simultaneously perform oil replenishment and venting while the plunger reciprocates, with the oil replenishment and venting paths not interfering with each other, achieving timely oil replenishment and venting. When the pressure relief threshold needs adjustment, it can be achieved simply by rotating the pressure relief valve, a simple and convenient process that eliminates the need to replace the pressure relief valve.

[0005] The technical problem solved by this invention can be achieved by the following technical solution: A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, comprising a pump head, a pump body, and a drive assembly. A reset diaphragm assembly is disposed within the pump body. The reset diaphragm assembly includes a diaphragm component and a reset mechanism for forcibly resetting the diaphragm component. The reset mechanism includes a diaphragm rod and a first spring portion that are fitted and installed with the diaphragm component. A first hydraulic chamber and a second hydraulic chamber are also disposed within the pump body. The pump head and pump body are fixedly connected to form a pump chamber. The diaphragm component separates the pump chamber from the first hydraulic chamber. An integrated oil supply and exhaust valve is also disposed within the pump body. The integrated oil supply and exhaust valve enables communication or isolation between the first and second hydraulic chambers. The valve is equipped with an exhaust channel and a replenishment channel. The exhaust channel is used to discharge gas from the first hydraulic chamber, and the replenishment channel is used to replenish hydraulic oil from the second hydraulic chamber into the first hydraulic chamber 32. The integrated oil replenishment and exhaust valve is provided with a beveled part, which allows gas to flow to the exhaust groove on the outside of the beveled part, so that oil replenishment and exhaust can be carried out simultaneously. The pump body is also equipped with an adjustable pressure relief valve, which can adjust the pressure relief threshold. The adjustable pressure relief valve includes a pressure relief valve body, a pressure relief chamber, a pressure relief valve core, and an adjustment component. One end of the pressure relief chamber is connected to the first hydraulic chamber, and the other end is in contact with the pressure relief valve core. The adjustment component is used to adjust the pressure of the pressure relief valve core at the port of the first hydraulic chamber, thereby adjusting the pressure relief threshold.

[0006] The drive assembly includes a drive mechanism and a linkage rod. The linkage rod causes the diaphragm rod to reciprocate along the axial direction of the pump cavity. When the linkage rod moves toward the pump cavity, the first spring is compressed. When the linkage rod moves away from the pump cavity, the first spring resets and causes the diaphragm rod to move away from the pump cavity.

[0007] The diaphragm assembly includes a fixing component and at least two diaphragm portions. The fixing component includes a first fixing portion and a second fixing portion, and the diaphragm portions are located between the first fixing portion and the second fixing portion to achieve fixed installation.

[0008] A first limiting part is provided inside the pump head, and a second limiting part is provided inside the pump body. When the diaphragm assembly moves a certain distance into the pump cavity, the first fixing part and the first limiting part form a contact limiting position. When the diaphragm assembly moves a certain distance away from the pump cavity, the second fixing part and the second limiting part form a contact limiting position.

[0009] The integrated oil replenishment and exhaust valve includes a first valve groove, a second valve groove, a third valve groove, an oil inlet channel, and an oil flow channel. The second valve groove vertically connects the first valve groove, the third valve groove, and the inclined section. A first positioning ball valve is provided at the intersection of the first valve groove and the second valve groove. The first valve groove and the exhaust groove are interconnected. The oil inlet channel is used to connect the second hydraulic cavity and the third valve groove, and the oil flow channel is used to connect the first hydraulic cavity and the inclined section.

[0010] When the linkage rod moves toward the pump chamber, the hydraulic oil in the first hydraulic chamber is compressed, causing the hydraulic oil to enter the second valve groove from the oil flow channel, causing the first positioning ball valve to move upward. When the hydraulic oil in the first hydraulic chamber decreases, the hydraulic oil in the second hydraulic chamber enters the first hydraulic chamber along the oil inlet channel, the third valve groove, the second valve groove, and the oil flow channel, forming a replenishment channel.

[0011] When the hydraulic oil moves the first positioning ball valve, the gas in the first hydraulic chamber flows along the oil flow channel, the inclined part, the exhaust groove and the first valve groove, and leaves the oil replenishment and exhaust integrated valve from the second valve groove and the third valve groove, forming an exhaust flow channel.

[0012] The regulating component includes a squeezing part and a second spring part. One end of the second spring part is installed in conjunction with the pressure relief valve core, and the other end is installed in conjunction with the squeezing part. The pump body is also provided with a stroke chamber. The pressure relief valve body moves along the stroke chamber, which drives the squeezing part to move, causing the second spring part to compress or relax, thereby adjusting the pressure relief threshold.

[0013] The extrusion section includes a first extrusion section, a second extrusion section, and a second positioning ball valve. The second positioning ball valve is located between the first extrusion section and the second extrusion section, and is installed centered with the first extrusion section and the second extrusion section.

[0014] The first extrusion section and / or the second extrusion section are connected to the pressure relief valve body by threads.

[0015] Compared with the prior art, the present invention has the following advantages: The spring portion installed on the diaphragm rod provides a push force when the diaphragm rod reciprocates, thereby overcoming the obstruction of the high pressure differential on the diaphragm assembly. The diaphragm assembly, by setting multiple layers of diaphragms and limiting components, makes the diaphragm less prone to fatigue damage during reciprocating movement. The hydraulic valve can simultaneously perform oil replenishment and venting while the plunger reciprocates, and the oil replenishment and venting paths do not interfere with each other, achieving timely oil replenishment and venting. When it is necessary to adjust the pressure relief threshold, it can be achieved simply by rotating the pressure relief valve; the process is simple and convenient, and there is no need to replace the pressure relief valve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 yes Figure 2 A partial enlarged view of the repositioning diaphragm assembly; Figure 4 yes Figure 2 A partial enlarged view of the integrated oil replenishment and exhaust valve; Figure 5 yes Figure 4 A magnified view of a portion of the image; Figure 6It is a cross-sectional view of the pump head, pump body, and adjustable pressure relief valve; Figure 7 yes Figure 6 A partial enlarged view of the adjustable pressure relief valve.

[0017] In the diagram: 1-Pump head, 11-Inlet section, 111-Inlet chamber, 12-Outlet section, 121-Outlet chamber, 13-Pump chamber, 14-First limiting section, 15-First inner edge section, 2-Drive assembly, 21-Drive mechanism, 22-Linkage rod, 3-Pump body, 31-Reset diaphragm assembly, 311-Diaphragm assembly, 3111-Fixing assembly, 3111a-First fixing section, 3111b-Second fixing section, 3112-Diaphragm section, 312-Reset mechanism, 3121-Diaphragm rod, 3122-First spring section, 32-First hydraulic chamber, 33-Second hydraulic chamber, 34-Replenishment oil Exhaust integrated valve, 340-sloping part, 341-first valve groove, 342-second valve groove, 343-third valve groove, 344-oil inlet passage, 345-oil flow passage, 346-exhaust groove, 347-first positioning ball valve, 35-adjustable pressure relief valve, 351-pressure relief valve body, 352-pressure relief chamber, 353-pressure relief valve core, 354-adjusting component, 3541-compression part, 3541a-first compression part, 3541b-second compression part, 3541c-second positioning ball valve, 3542-second spring part, 36-second limiting part, 37-stroke chamber, 38-second inner edge part. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0019] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] Combined with appendix Figures 1 to 7As shown, this embodiment discloses a high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, including a pump head 1, a pump body 3, and a drive assembly 2. The pump head 1 includes an inlet section 11 and an outlet section 12. Preferably, in this embodiment, the inlet section 11 is located at the lower part of the pump head 1, and the outlet section 12 is located at the upper part of the pump head 1. A reset diaphragm assembly 31 is disposed inside the pump body 3. The reset diaphragm assembly 31 includes a diaphragm component 311 and a reset mechanism 312 for forcibly resetting the diaphragm component 311. The reset mechanism 312 includes components connected to the diaphragm component 311. The pump body 3 is equipped with a diaphragm rod 3121 and a first spring 3122, and also includes a first hydraulic chamber 32 and a second hydraulic chamber 33. The pump head 1 and the pump body 3 are fixedly connected to form a pump chamber 13. The diaphragm assembly 311 separates the pump chamber 13 from the first hydraulic chamber 32. The inlet section 11 includes an inlet chamber 111, and the outlet section 12 includes an outlet chamber 121. The inlet chamber 111, the pump chamber 13, and the outlet chamber 121 are interconnected to form a material flow channel for transporting materials. Both the inlet chamber 111 and the outlet chamber 121 are equipped with check valves to allow... The material flows in a unidirectional manner. The pump body 3 is also equipped with an integrated oil supply and exhaust valve 34, which allows for the connection or isolation between the first hydraulic chamber 32 and the second hydraulic chamber 33. The integrated oil supply and exhaust valve 34 has an exhaust channel and an oil supply channel. The exhaust channel is used to discharge gas from the first hydraulic chamber 32, and the oil supply channel is used to replenish hydraulic oil from the second hydraulic chamber 33 into the first hydraulic chamber 32. The integrated oil supply and exhaust valve 34 has a beveled section 340, which allows gas to flow to the beveled section 340. In the exhaust groove 346 on the outside of 0, oil replenishment and exhaust can be carried out simultaneously; an adjustable pressure relief valve 35 is also provided in the pump body 3. The adjustable pressure relief valve 35 can adjust the pressure relief threshold. The adjustable pressure relief valve 35 includes a pressure relief valve body 351, a pressure relief chamber 352, a pressure relief valve core 353 and an adjustment component 354. One end of the pressure relief chamber 352 is connected to the first hydraulic chamber 32, and the other end is in contact with the pressure relief valve core 353. The adjustment component 354 is used to adjust the pressure of the pressure relief valve core 353 on the port of the first hydraulic chamber 32, thereby adjusting the pressure relief threshold.

[0021] In summary, the drive assembly 2 includes a drive mechanism 21 and a linkage 22. The drive mechanism 21 includes a drive housing, a drive motor located on the upper part of the drive housing, and a drive device located inside the drive housing. The drive device adopts a cam swing arm structure as shown in CN116608114B. The drive device is used to drive the linkage 22 to reciprocate. The linkage 22 causes the diaphragm rod 3121 to drive the diaphragm assembly 311 to reciprocate along the axial direction of the pump chamber 13. When the linkage 22 moves toward the pump chamber 13, the first spring part 3122 is compressed. When the linkage 22 moves away from the pump chamber 13, the first spring part 3122 resets and drives the diaphragm rod 3121 to move away from the pump chamber 13.

[0022] In conjunction with the above installation structure, preferably, in this embodiment, as the linkage rod 22 moves away from the pump chamber 13, the linkage rod 22 will disengage from the diaphragm rod 3121, forming a gap with the diaphragm rod 3121, so that the diaphragm rod 3121 is reset by the push force of the first spring part 3122, in order to overcome the pressure when the pump chamber 13 is under negative pressure; when the pump chamber 13 is under high pressure, the linkage rod 22 pushes against the diaphragm rod 3121 as it moves towards the pump chamber 13, and the first spring part 3122 plays a certain buffering role when compressed, making the reciprocating movement of the diaphragm assembly 311 more stable and smooth, and improving the stability of the diaphragm pump during operation.

[0023] In conjunction with the above, the diaphragm assembly 311 includes a fixing assembly 3111 and at least two diaphragm portions 3112. The fixing assembly 3111 includes a first fixing portion 3111a and a second fixing portion 3111b. The diaphragm portions 3112 are located between the first fixing portion 3111a and the second fixing portion 3111b for fixed installation. Preferably, in this embodiment, the diaphragm portions 3112 are preferably annular. The inner ring of the diaphragm portion 3112 is located between the first fixing portion 3111a and the second fixing portion 3111b for fixed installation. The outer ring of the diaphragm portion 3112 is fixedly installed with the pump head 1 and the pump body 3. The fixing assembly 3111 is coaxially fixedly installed with the diaphragm rod 3121.

[0024] In conjunction with the above, a first limiting part 14 is provided inside the pump head 1, and a second limiting part 36 is provided inside the pump body 3. When the diaphragm assembly 311 moves a certain distance toward the pump cavity 13, the first fixing part 3111a and the first limiting part 14 form a contact limiting. When the diaphragm assembly 311 moves a certain distance away from the pump cavity 13, the second fixing part 3111b and the second limiting part 36 form a contact limiting.

[0025] Combined with the above installation structure, the pump head 1 and the pump body 3 form a first inner edge 15 and a second inner edge 38 with the periphery of the fixed part of the diaphragm part 3112, respectively. When the diaphragm assembly 311 moves back and forth, the unfixed part in the middle of the diaphragm part 3112 will be pulled to a certain extent with the first inner edge 15 and the second inner edge 38. The first limiting part 14 and the second limiting part 36 are used to limit the moving distance of the diaphragm assembly 311 when it moves back and forth, thereby reducing the tension generated between the diaphragm part 3112 and the first inner edge 15 and the second inner edge 38 when it moves, and delaying the fatigue failure of the diaphragm part 3112.

[0026] In summary, the integrated oil replenishment and exhaust valve 34 includes a first valve groove 341, a second valve groove 342, a third valve groove 343, an oil inlet channel 344, and an oil flow channel 345. The second valve groove 342 vertically connects the first valve groove 341, the third valve groove 343, and the inclined surface 340. A first positioning ball valve 347 is provided at the intersection of the first valve groove 341 and the second valve groove 342. The first valve groove 341 is interconnected with the exhaust groove 346. The oil inlet channel 344 is used to connect the second hydraulic cavity 33 and the third valve groove 343. The oil flow channel 345 is used to connect the first hydraulic cavity 32 and the inclined surface 340.

[0027] In combination with the above installation structure, preferably, in this embodiment, the diaphragm rod 3121 makes the first hydraulic cavity 32 form a shape with large space at both ends and small space in the middle, and the cavity spaces at both ends are interconnected; the first valve groove 341 and the third valve groove 343 are horizontally arranged, and the second valve groove 342 is vertically arranged. When the diaphragm pump is not working, the first positioning ball valve 347 will block the lower second valve groove 342 due to its own weight, so that the second valve groove 342 above the first positioning ball valve 347 and the second valve groove 342 below the first positioning ball valve 347 are not interconnected.

[0028] In summary, when the linkage rod 22 moves toward the pump chamber 13, it enters the first hydraulic chamber 32, compressing the hydraulic oil in the first hydraulic chamber 32. This causes the hydraulic oil to enter the second valve groove 342 through the oil flow channel 345, causing the first positioning ball valve 347 to move upward. During this process, the diaphragm rod 3121 continuously reciprocates within the first hydraulic chamber 32, causing the hydraulic oil to emulsify and form an oil-gas mixture, resulting in hydraulic oil loss. When the hydraulic oil in the first hydraulic chamber 32 decreases, the hydraulic oil in the second hydraulic chamber 33 enters the first hydraulic chamber 32 along the oil inlet channel 344, the third valve groove 343, the second valve groove 342, and the oil flow channel 345, forming a replenishment channel to replenish the first hydraulic chamber 32.

[0029] In summary, after leaving the oil-gas mixture, the gas components move along the inclined surface 340 to both sides of the inclined surface 340, and mainly move upward along the inclined surface 340 until entering the exhaust groove 346. Subsequently, they enter the first valve groove 341. When the diaphragm pump is not working, the first positioning ball valve 347 blocks the first valve groove 341 on both sides. When the hydraulic oil causes the first positioning ball valve 347 to move upward, the first valve groove 341 and the second valve groove 342 are temporarily connected to each other. The gas in the first hydraulic chamber 32 leaves the oil supply and exhaust integrated valve 34 along the oil-gas mixture 345, the inclined surface 340, the exhaust groove 346 and the first valve groove 341, and exits from the second valve groove 342 and the third valve groove 343, forming an exhaust flow channel.

[0030] Combined with the above installation structure, the oil replenishment and venting processes in the first hydraulic chamber 32 can be carried out synchronously. Each time the diaphragm assembly 311 reciprocates, it can perform oil replenishment and venting, thus achieving timely oil replenishment and venting of the first hydraulic chamber 32.

[0031] In combination with the above, preferably, in this embodiment, the first positioning ball valve 347 is installed centered with the first valve groove 341 and the second valve groove 342, so that the first positioning ball valve 347 is precisely positioned with the first valve groove 341 and the second valve groove 342. When the first valve groove 341 and the second valve groove 342 are displaced and misaligned, the first positioning ball valve 347 can reset the first valve groove 341 or the second valve groove 342 to its original position, thereby improving the stability of the diaphragm pump.

[0032] In combination with the above, the adjusting component 354 includes a squeezing part 3541 and a second spring part 3542. One end of the second spring part 3542 is installed in conjunction with the pressure relief valve core 353, and the other end is installed in conjunction with the squeezing part 3541. The pump body 3 is also provided with a stroke chamber 37, which is located at the lower part of the adjustable pressure relief valve 35. The pressure relief valve body 351 moves along the stroke chamber 37, which drives the squeezing part 3541 to move, causing the second spring part 3542 to compress or relax, thereby adjusting the pressure relief threshold.

[0033] In conjunction with the above installation structure, specifically, when the user needs to adjust the pressure relief of the adjustable pressure relief valve 35, the pressure relief valve body 351 can enter or leave the stroke chamber 37. During the movement of the pressure relief valve body 351, the squeezing part 3541 will move. During the movement of the squeezing part 3541, the second spring part 3542 is compressed or relaxed, thereby changing the pressure of the pressure relief valve core 353 on the port of the pressure relief chamber 352. Preferably, in this embodiment, the pressure relief valve core 353 is provided with a pressure relief ball valve, which is installed in conjunction with the port of the pressure relief chamber 352.

[0034] In summary, the extrusion section 3541 includes a first extrusion section 3541a, a second extrusion section 3541b, and a second positioning ball valve 3541c. The second positioning ball valve 3541c is located between the first extrusion section 3541a and the second extrusion section 3541b. The second positioning ball valve 3541c is installed centrally with the first extrusion section 3541a and the second extrusion section 3541b, so that the second positioning ball valve 3541c is precisely positioned with the first extrusion section 3541a and the second extrusion section 3541b. When displacement occurs between the first extrusion section 3541a and the second extrusion section 3541b, causing misalignment, the second positioning ball valve 3541c can reset the first extrusion section 3541a and the second extrusion section 3541b to their original positions, thereby improving the overall stability.

[0035] In conjunction with the above, the first extrusion part 3541a and / or the second extrusion part 3541b are threadedly connected to the pressure relief valve body 351. Preferably, in this embodiment, the first extrusion part 3541a is threadedly connected to the inner wall of the pressure relief valve body 351.

[0036] With the above installation structure, users can freely adjust the pressure relief threshold of the adjustable pressure relief valve 35 by simply rotating the pressure relief valve body 351. The process is simple and convenient, greatly reducing the adjustment operation time and thus improving efficiency.

[0037] This invention utilizes a spring mounted on the diaphragm rod to provide a push force during the reciprocating movement of the diaphragm rod, thereby overcoming the obstruction of the high pressure differential on the diaphragm assembly. The diaphragm assembly, through the arrangement of multiple diaphragms and limiting components, prevents fatigue damage to the diaphragm during reciprocating movement. The hydraulic valve can simultaneously perform oil replenishment and venting while the plunger reciprocates, and the oil replenishment and venting paths do not interfere with each other, achieving timely oil replenishment and venting. When it is necessary to adjust the pressure relief threshold, it can be achieved simply by rotating the pressure relief valve, a simple and convenient process that does not require replacing the pressure relief valve.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, comprising a pump head (1), a pump body (3), and a drive assembly (2), characterized in that: The pump body (3) is provided with a reset diaphragm assembly (31), which includes a diaphragm component (311) and a reset mechanism (312) for forcibly resetting the diaphragm component (311). The reset mechanism (312) includes a diaphragm rod (3121) and a first spring part (3122) that are installed in conjunction with the diaphragm component (311). The pump body (3) is also provided with a first hydraulic chamber (32) and a second hydraulic chamber (33). The pump head ( 1) A pump chamber (13) is fixedly connected to the pump body (3), and the diaphragm assembly (311) is used to separate the pump chamber (13) from the first hydraulic chamber (32); the pump body (3) is also provided with an oil replenishment and exhaust integrated valve (34), which is used to realize the connection or isolation between the first hydraulic chamber (32) and the second hydraulic chamber (33). The oil replenishment and exhaust integrated valve (34) is provided with an exhaust flow channel and an oil replenishment flow channel. The exhaust flow channel is used to realize the connection or isolation between the first hydraulic chamber (32) and the second hydraulic chamber (33). The gas in the hydraulic chamber (32) is discharged. The oil replenishment channel is used to replenish the hydraulic oil in the second hydraulic chamber (33) to the first hydraulic chamber (32). The oil replenishment and exhaust integrated valve (34) is provided with a beveled part (340). The beveled part (340) allows the gas to flow to the exhaust groove (346) on the outside of the beveled part (340), so that oil replenishment and exhaust can be carried out simultaneously. An adjustable pressure relief valve (35) is also provided in the pump body (3). The adjustable pressure relief valve (35) The adjustable pressure relief valve (35) can adjust the pressure relief threshold. The adjustable pressure relief valve (35) includes a pressure relief valve body (351), a pressure relief chamber (352), a pressure relief valve core (353), and an adjustment component (354). One end of the pressure relief chamber (352) is connected to the first hydraulic chamber (32), and the other end is in contact with the pressure relief valve core (353). The adjustment component (354) is used to adjust the pressure of the pressure relief valve core (353) on the port of the first hydraulic chamber (32) to adjust the pressure relief threshold.

2. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, as described in claim 1, characterized in that: The drive assembly (2) includes a drive mechanism (21) and a linkage rod (22). The linkage rod (22) causes the diaphragm rod (3121) to drive the diaphragm assembly (311) to reciprocate along the axial direction of the pump chamber (13). When the linkage rod (22) moves toward the pump chamber (13), the first spring part (3122) is compressed. When the linkage rod (22) moves away from the pump chamber (13), the first spring part (3122) resets and drives the diaphragm rod (3121) to move away from the pump chamber (13).

3. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, as described in claim 2, characterized in that: The diaphragm assembly (311) includes a fixing assembly (3111) and at least two diaphragm portions (3112). The fixing assembly (3111) includes a first fixing portion (3111a) and a second fixing portion (3111b). The diaphragm portions (3112) are located between the first fixing portion (3111a) and the second fixing portion (3111b) for fixed installation.

4. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, as described in claim 3, characterized in that: A first limiting part (14) is provided inside the pump head (1), and a second limiting part (36) is provided inside the pump body (3). When the diaphragm assembly (311) moves a certain distance toward the pump cavity (13), the first fixing part (3111a) and the first limiting part (14) form a contact limiting. When the diaphragm assembly (311) moves a certain distance away from the pump cavity (13), the second fixing part (3111b) and the second limiting part (36) form a contact limiting.

5. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, as described in claim 1, characterized in that: The integrated oil replenishment and exhaust valve (34) includes a first valve groove (341), a second valve groove (342), a third valve groove (343), an oil inlet channel (344), and an oil flow channel (345). The second valve groove (342) vertically penetrates the first valve groove (341), the third valve groove (343), and the inclined surface (340). A first positioning ball valve (347) is provided at the intersection of the first valve groove (341) and the second valve groove (342). The first valve groove (341) is connected to the exhaust groove (346). The oil inlet channel (344) is used to connect the second hydraulic cavity (33) and the third valve groove (343). The oil flow channel (345) is used to connect the first hydraulic cavity (32) and the inclined surface (340).

6. A high-pressure hydraulic diaphragm pump with a high-pressure or vacuum-resistant inlet end as described in claim 5, characterized in that: When the linkage rod (22) moves toward the pump chamber (13), the hydraulic oil in the first hydraulic chamber (32) is compressed, causing the hydraulic oil to enter the second valve groove (342) from the oil flow channel (345), causing the first positioning ball valve (347) to move upward. When the hydraulic oil in the first hydraulic chamber (32) decreases, the hydraulic oil in the second hydraulic chamber (33) enters the first hydraulic chamber (32) along the oil inlet channel (344), the third valve groove (343), the second valve groove (342), and the oil flow channel (345), forming a replenishment channel.

7. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, as described in claim 6, characterized in that: When the hydraulic oil moves the first positioning ball valve (347), the gas in the first hydraulic chamber (32) flows along the oil flow channel (345), the inclined surface (340), the exhaust groove (346) and the first valve groove (341), and leaves the oil replenishment and exhaust integrated valve (34) from the second valve groove (342) and the third valve groove (343), forming an exhaust flow channel.

8. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, as described in claim 1, characterized in that: The regulating component (354) includes a squeezing part (3541) and a second spring part (3542). One end of the second spring part (3542) is installed in conjunction with the pressure relief valve core (353), and the other end is installed in conjunction with the squeezing part (3541). The pump body (3) is also provided with a stroke chamber (37). The pressure relief valve body (351) moves along the stroke chamber (37), which drives the squeezing part (3541) to move, so that the second spring part (3542) is compressed or relaxed, thereby adjusting the pressure relief threshold.

9. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, as described in claim 8, characterized in that: The extrusion section (3541) includes a first extrusion section (3541a), a second extrusion section (3541b), and a second positioning ball valve (3541c). The second positioning ball valve (3541c) is located between the first extrusion section (3541a) and the second extrusion section (3541b). The second positioning ball valve (3541c) is centrally mounted with the first extrusion section (3541a) and the second extrusion section (3541b).

10. A high-pressure hydraulic diaphragm pump with an inlet end resistant to high pressure or vacuum, as described in claim 9, characterized in that: The first extrusion part (3541a) and / or the second extrusion part (3541b) are threadedly connected to the pressure relief valve body (351).

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