A fluid-replenishable valve-type combined diaphragm hydrostatic amplifier

Abstract

This invention provides a valve-type combined diaphragm hydrostatic amplifier with fluid replenishment capability, comprising a drive push rod, a rolling diaphragm, a corrugated diaphragm, a fluid chamber sleeve, a fluid chamber sleeve cover, a fluid replenishment plug, a fluid replenishment plug cover, a one-way valve core, and a one-way valve spring. The fluid chamber sleeve has an internal cavity with a small through-hole and a large through-hole on both sides, and a fluid replenishment port at the top. The rolling diaphragm is fixedly installed outside the small through-hole. The corrugated diaphragm is located outside the large through-hole and fixedly installed on the valve core. The fluid chamber sleeve cover is fixedly installed on the fluid replenishment port. The large-diameter end of the fluid replenishment plug extends through the fluid chamber sleeve cover into the fluid replenishment port. The fluid replenishment plug cover is fixedly installed on the small-diameter end of the fluid replenishment plug. The fluid replenishment plug has an internal through-hole. This invention has the advantages of large displacement deformation and large output force, and fluid replenishment can be achieved by moving the fluid replenishment plug to reduce the cavity volume of the fluid chamber sleeve.

Description

Technical Field

[0001] This invention relates to the field of hydraulic technology, and more particularly to a valve-type combined diaphragm hydrostatic amplifier that can be replenished with fluid. Background Technology

[0002] Compared to traditional hydraulic systems, water-based systems offer advantages such as environmental friendliness, low cost, and ease of maintenance. However, the low viscosity of water makes it more prone to leakage, placing stricter demands on sealing. Furthermore, the friction introduced by the seals also acts on the valve core, further increasing the output force required by the valve core actuator. High-output electromechanical converters are typically large and expensive, failing to meet the requirements of miniaturization and low cost; while smaller electromechanical converters struggle to independently output large thrust to move the valve core. Force amplifiers work by using a smaller force and a larger displacement to achieve a larger force and a smaller displacement, making them ideal for use with small electromechanical converters, perfectly suited to the control requirements of water-based valve cores. Common force amplifier types include lever-type, triangular-type, parallelogram-type, bridge-type, and hydraulic force amplifiers. Lever-type, triangular-type, parallelogram-type, and bridge-type force amplifiers, due to their large size, are unsuitable for the miniaturization requirements of valves. Hydraulic force amplifiers have advantages such as large output force, small size, large load capacity, simple structure, low cost, and good maintainability. Therefore, hydraulic force amplifiers are used as force amplifiers for water pressure valves. However, existing hydraulic force amplifier structures have the following problems: 1. They cannot achieve large displacement deformation; 2. They have leakage problems and cannot replenish the leaking fluid in a timely manner, resulting in an inability to guarantee an accurate amplification ratio. Summary of the Invention

[0003] In view of the above-mentioned technical problems that existing hydraulic force amplifiers cannot achieve large displacement deformation and cannot be replenished after leakage, a valve-type combined diaphragm hydrostatic force amplifier with replenishable fluid is provided.

[0004] The technical means employed in this invention are as follows:

[0005] A fluid-replenishable valve-type combined diaphragm hydrostatic amplifier includes a drive push rod, a rolling diaphragm, a corrugated diaphragm, a fluid chamber sleeve, a fluid chamber sleeve cover, a fluid replenishing plug, a fluid replenishing plug cover, a one-way valve core, and a one-way valve spring.

[0006] The liquid cavity sleeve has a cavity inside, with a small through hole and a large through hole on both sides of the cavity, and a liquid replenishment port on the top.

[0007] The rolling diaphragm is fixedly installed on the outside of the small through hole; the rolling diaphragm is fixedly connected to the drive push rod; the corrugated diaphragm is located on the outside of the large through hole and fixedly installed on the valve core, the valve core is installed on the valve body, the valve body is fixedly installed on the liquid chamber sleeve and the corrugated diaphragm is pressed and fixed between the valve body and the liquid chamber sleeve;

[0008] The liquid cavity sleeve cover is fixedly installed on the liquid inlet and is provided with a threaded hole. The large-diameter end of the liquid inlet plug passes through the liquid cavity sleeve cover and extends into the liquid inlet, and is clearance-fitted with the inner wall of the liquid inlet. The liquid inlet plug is installed in the threaded hole through the external thread provided in the middle.

[0009] The small-diameter end of the replenishing plug is provided with an external thread and a countersunk hole I. The lower part of the one-way valve core is installed in the countersunk hole I through the one-way valve spring. The replenishing plug cover is provided with a countersunk hole II, and the countersunk hole II is provided with an internal thread. The replenishing plug cover is fixedly installed on the small-diameter end of the replenishing plug through the internal thread and the external thread. The countersunk hole I and the countersunk hole II are connected. The top of the replenishing plug cover is provided with a replenishing plug cover vent hole connected to the countersunk hole II. The upper part of the one-way valve core is located in the countersunk hole II, and there is a gap between the side of the valve core and the countersunk hole I and the countersunk hole II. The top can control the opening and closing of the replenishing plug cover vent hole and the countersunk hole II.

[0010] The liquid replenishment plug has a through hole inside, and the two ends of the through hole are respectively connected to the countersunk hole I and the cavity.

[0011] Furthermore, the rolling diaphragm is fixedly installed on the outside of the small through hole by a rolling diaphragm fixing flange and a liquid cavity sleeve screw. The rolling diaphragm fixing flange is provided with a rolling diaphragm fixing flange groove, and the rolling diaphragm is provided with a protrusion I that engages with the rolling diaphragm fixing flange groove. The corrugated diaphragm is fixedly installed on the valve core by a corrugated diaphragm screw, and a corrugated diaphragm gasket is provided between the corrugated diaphragm and the valve core. The valve body is fixedly installed on the liquid cavity sleeve by the liquid cavity sleeve screw. The end face of the valve body that contacts the corrugated diaphragm is provided with a valve body groove, and the corrugated diaphragm is provided with a protrusion II that engages with the valve body groove.

[0012] Furthermore, the portion of the replenishing plug that extends into the replenishing port is provided with a first sealing groove and a second sealing groove. A first sealing ring and a second sealing ring are respectively installed in the first sealing groove and the second sealing groove. The first sealing ring and the second sealing ring are located between the replenishing plug and the inner wall of the replenishing port.

[0013] Furthermore, the small-diameter end of the replenishing plug and the external threaded connection in the middle are prismatic structures, and a combined sealing ring for the small-diameter end of the replenishing plug is provided between the bottom surface of the replenishing plug cap and the prismatic structure.

[0014] Furthermore, a one-way valve sealing ring is provided between the top of the one-way valve core and the liquid replenishment plug cap, and a one-way valve sealing groove for installing the one-way valve sealing ring is provided on the top of the one-way valve core.

[0015] Furthermore, the liquid chamber sleeve, the liquid chamber sleeve cover, the liquid replenishing plug, the liquid replenishing plug cover, the one-way valve core, the one-way valve spring, the valve core and the valve body are made of stainless steel, and the rolling diaphragm and the corrugated diaphragm are made of flexible material.

[0016] Furthermore, the drive push rod is fixedly connected to the mover of the electromechanical converter by a thread, the stator of the electromechanical converter is connected to the rolling diaphragm fixing flange by a connecting flange, the connecting flange is connected to the stator of the electromechanical converter by a connecting flange screw, and is connected to the rolling diaphragm fixing flange by the liquid cavity sleeve screw.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier provided by the present invention has the advantages of large displacement deformation, large output force and low system cost; and fluid replenishment can be achieved by moving the fluid replenishment plug to reduce the volume of the closed cavity of the fluid chamber sleeve, which improves the stability of the amplification factor during use and increases the ease of use.

[0019] 2. The fluid-fillable valve-type combined diaphragm hydrostatic force amplifier provided by the present invention can prevent the liquid in the fluid chamber sleeve from overflowing from the vent hole of the fluid filling screw cap during normal operation. At the same time, the compression of the one-way valve core can discharge the gas in the closed cavity of the fluid chamber sleeve from the vent hole of the fluid filling screw cap, so that the fluid chamber sleeve is filled with liquid, thereby improving the accuracy of the amplification factor of the force amplifier.

[0020] 3. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier provided by the present invention uses a combination of rolling diaphragm and corrugated diaphragm to statically seal the end face of the liquid chamber sleeve. Furthermore, the rolling diaphragm fixing flange and the valve body are provided with grooves at the end of the fixed diaphragm to prevent the diaphragm from slipping out under force, thereby improving the reliability of the seal.

[0021] 4. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier provided by the present invention has a corrugated diaphragm that is pressed and fixed to the end face of the liquid chamber sleeve by the valve body, which reduces the volume space of the corrugated diaphragm fixing flange; the valve core is used as the push rod of the corrugated diaphragm, which reduces the volume space of the corrugated diaphragm push rod. It has the advantages of small volume, compact structure, simple installation and flexible spatial arrangement.

[0022] For the reasons stated above, this invention can be widely applied in the field of force amplifiers. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the fluid-replenishable valve-type combined diaphragm hydrostatic amplifier described in this invention.

[0025] Figure 2 This is a left view of the fluid-replenishable valve-type combined diaphragm hydrostatic amplifier described in this invention.

[0026] Figure 3 This is a top view of the liquid cavity sleeve cover described in this invention.

[0027] In the diagram: 1. Mover; 2. Stator; 3. Drive push rod; 4. Connecting flange; 4-1. Connecting flange vent; 5. Rolling diaphragm; 6. Rolling diaphragm fixing flange; 6-1. Rolling diaphragm fixing flange groove; 7. Corrugated diaphragm; 8. Corrugated diaphragm gasket; 9. Liquid chamber sleeve; 10. Liquid chamber sleeve cover; 11. Liquid replenishing plug; 12. Liquid replenishing plug cover; 12-1. Liquid replenishing plug cover vent hole; 13. One-way valve core; 14. One-way valve sealing ring; 14-1, Check valve sealing groove; 15, Check valve spring; 16, Combined sealing ring; 17, First sealing ring; 17-1, First sealing groove; 18, Second sealing ring; 18-1, Second sealing groove; 19, Connecting flange bolt; 20, Rolling diaphragm bolt; 21, Corrugated diaphragm bolt; 22, Liquid chamber sleeve bolt; 23, Liquid chamber sleeve cap bolt; 24, Valve core; 25, Valve body; 25-1, Valve body groove; 25-2, Valve body vent. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not 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 on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0035] Example 1

[0036] like Figure 1 As shown, the present invention provides a valve-type combined diaphragm hydrostatic amplifier with liquid replenishment capability, including a drive push rod 3, a rolling diaphragm 5, a corrugated diaphragm 7, a liquid chamber sleeve 9, a liquid chamber sleeve cover 10, a liquid replenishment plug 11, a liquid replenishment plug cover 12, a one-way valve core 13, and a one-way valve spring 15.

[0037] The liquid cavity sleeve 9 has a cavity inside, which is used to hold the liquid that transmits hydraulic pressure. Small through holes and large through holes are respectively provided on both sides of the cavity, and a liquid replenishment port is provided at the top.

[0038] The rolling diaphragm 5 is fixedly installed on the outside of the small through hole; the rolling diaphragm 5 is fixedly connected to the drive push rod 3; the corrugated diaphragm 7 is located on the outside of the large through hole and is fixedly installed on the valve core 24; the valve core 24 is installed on the valve body 25; the valve body 25 is fixedly installed on the liquid chamber sleeve 9 and the corrugated diaphragm 7 is pressed and fixed between the valve body 25 and the liquid chamber sleeve 9;

[0039] The liquid chamber sleeve cover 10 is fixedly installed on the liquid inlet and is provided with a threaded hole. The large-diameter end of the liquid inlet plug 11 passes through the liquid chamber sleeve cover 10 and extends into the liquid inlet, and is clearance-fitted with the inner wall of the liquid inlet. The liquid inlet plug 11 is installed in the threaded hole through the external thread provided in the middle. The liquid inlet plug 11 can move up and down in the liquid inlet through the threaded connection.

[0040] The small-diameter end of the replenishing plug 11 is provided with an external thread and a countersunk hole I. The lower part of the one-way valve core 13 is installed in the countersunk hole I through the one-way valve spring 15. The replenishing plug cover 12 is provided with a countersunk hole II, and the countersunk hole II is provided with an internal thread. The replenishing plug cover 12 is fixedly installed on the small-diameter end of the replenishing plug 11 through the internal thread and the external thread. The countersunk hole I and the countersunk hole II are connected. The top of the replenishing plug cover 12 is provided with a replenishing plug cover vent hole that is connected to the countersunk hole II. 12-1, the upper part of the one-way valve core 13 is located inside the countersunk hole II, and there is a gap between the side of the valve core 13 and the countersunk hole I and the countersunk hole II. The top of the valve core 13 can control the opening and closing of the vent hole 12-1 of the liquid replenishing screw cap and the countersunk hole II. By pressing the one-way valve core 13, the vent hole 12-1 of the liquid replenishing screw cap can be connected to the countersunk hole II. After the pressing of the one-way valve core 13 is stopped, the one-way valve core 13 can be reset and re-closed by the one-way valve spring 15.

[0041] The liquid replenishing plug 11 has a through hole inside, and the two ends of the through hole are respectively connected to the countersunk hole I and the cavity.

[0042] Furthermore, the rolling diaphragm 5 is fixedly connected to the drive push rod 3 by the rolling diaphragm screw 20.

[0043] Furthermore, the rolling diaphragm 5 is pressed and fixed to the outer end face of the small through hole by the rolling diaphragm fixing flange 6; the corrugated diaphragm 7 is pressed and fixed to the end face of the valve body 25 by the outer end face of the large through hole.

[0044] Furthermore, the valve body 25 has a countersunk hole III with a diameter slightly smaller than that of the corrugated diaphragm 7 on its end face near the corrugated diaphragm 7, and a valve body vent hole 25-2 connected to the countersunk hole III is provided along the circumferential wall. The countersunk hole III communicates with the outside through the valve body vent hole 25-2. The valve body vent hole 25-2 is used to prevent the cavity of the countersunk hole III from forming a closed volume, thereby affecting the deformation of the corrugated diaphragm 7.

[0045] Furthermore, the rolling diaphragm 5 is fixedly installed on the outside of the small through hole via the rolling diaphragm fixing flange 6 and the liquid cavity sleeve screw 22. The rolling diaphragm fixing flange 6 is provided with a rolling diaphragm fixing flange groove 6-1, and the rolling diaphragm 5 is provided with a protrusion I that engages with the rolling diaphragm fixing flange groove 6-1. The corrugated diaphragm 7 is fixedly installed on the valve core 24 via the corrugated diaphragm screw 21, and a corrugated diaphragm gasket 8 is provided between the corrugated diaphragm 7 and the valve core 24. The valve body 25 is fixedly installed on the liquid cavity sleeve 9 via the liquid cavity sleeve screw 22. The end face of the valve body 25 that contacts the corrugated diaphragm 7 is provided with a valve body groove 25-1, and the corrugated diaphragm 7 is provided with a protrusion II that engages with the valve body groove 25-1.

[0046] Furthermore, the head diameter of the corrugated diaphragm screw 21 is similar to the diameter of the circle in the central plane of the corrugated diaphragm 7.

[0047] Furthermore, a circular washer with a diameter similar to the diameter of the central plane circle of the corrugated diaphragm 7 is provided between the corrugated diaphragm screw 21 and the corrugated diaphragm 7.

[0048] Furthermore, the portion of the replenishing screw plug 11 that extends into the replenishing port is provided with a first sealing groove 17-1 and a second sealing groove 18-1. A first sealing ring 17 and a second sealing ring 18 are respectively installed in the first sealing groove 17-1 and the second sealing groove 18-1. The first sealing ring 17 and the second sealing ring 18 are located between the replenishing screw plug 11 and the inner wall of the replenishing port, thus playing a sealing role.

[0049] Furthermore, the small-diameter end of the replenishing plug 11 and the external threaded connection in the middle are prismatic structures. A combined sealing ring 16 for the small-diameter end of the replenishing plug is provided between the bottom surface of the replenishing plug cover 12 and the prismatic structure. The prismatic structure also facilitates installation with a wrench.

[0050] Furthermore, a one-way valve sealing ring 14 is provided between the top of the one-way valve core 13 and the liquid replenishment plug cap 12, and a one-way valve sealing groove 14-1 for installing the one-way valve sealing ring 14 is provided on the top of the one-way valve core 13.

[0051] Furthermore, the liquid cavity sleeve cover 10 is fixedly installed on the liquid replenishment port by the liquid cavity sleeve cover screw 23.

[0052] Furthermore, the liquid chamber sleeve 9 can increase the volume of the cavity by simultaneously increasing the height of the liquid inlet and the length of the liquid inlet plug 11, thereby increasing the liquid supply of the hydraulic pressure amplifier.

[0053] Furthermore, the transition surface between the large through hole and the small through hole of the liquid cavity sleeve 9 can be set as a right-angle transition type or other geometric transition type.

[0054] Furthermore, the drive push rod 3, the connecting flange 4, the rolling diaphragm fixing flange 6, the corrugated diaphragm gasket 8, the liquid chamber sleeve 9, the liquid chamber sleeve cover 10, the replenishing plug 11, the replenishing plug cover 12, the one-way valve core 13, the one-way valve spring 15, the valve core 24, and the valve body 25 are made of stainless steel, while the rolling diaphragm 5 and the corrugated diaphragm 7 are made of flexible material.

[0055] Furthermore, the drive push rod 3 is fixedly connected to the mover 1 of the electro-mechanical converter by threads, and the stator 2 of the electro-mechanical converter is connected to the rolling diaphragm fixing flange 6 by the connecting flange 4. The connecting flange 4 is connected to the stator 2 of the electro-mechanical converter by the connecting flange screw 19, and is connected to the rolling diaphragm fixing flange 6 by the liquid chamber sleeve screw 22. The liquid chamber sleeve screw 22 sequentially connects the connecting flange 4, the rolling diaphragm fixing flange 6, the liquid chamber sleeve 9, and the valve body 25.

[0056] Furthermore, the connecting flange 4 is provided with a connecting flange vent hole 4-1 on its circumferential wall surface to connect the cavity inside the connecting flange 4 with the outside, thereby preventing the cavity inside the connecting flange 4 from forming a closed volume and thus affecting the deformation of the rolling diaphragm 5.

[0057] When using the liquid-replenishable valve-type combined diaphragm hydrostatic amplifier provided by this invention, the drive push rod 3 needs to be connected to the mover 1 of the electro-mechanical converter, the stator 2 needs to be fixed to the liquid chamber sleeve 9 through the connecting flange 4, and water needs to be added to the cavity of the liquid chamber sleeve 9 in advance until it is full. Then, the liquid replenishing plug 11 is installed at the liquid replenishing port. By rotating the liquid replenishing plug 11, it moves downward to reduce the volume of the cavity. At the same time, the one-way valve core 13 is pressed down, so that the gas mixed in the cavity of the liquid chamber sleeve 9 passes through the internal through hole of the liquid replenishing plug 11 and the gap between the countersunk hole I and the countersunk hole II and the one-way valve core 13 in sequence, and finally is discharged from the vent hole 12-1 of the liquid replenishing plug cover. Move the liquid replenishing plug 11 until only liquid flows out of the vent hole 12-1 of the liquid replenishing plug cover, stop pressing the one-way valve core 13, and the one-way valve spring 15 helps the one-way valve core 13 to rebound and re-close the vent hole 12-1 of the liquid replenishing plug cover, and achieves sealing through the one-way valve sealing ring 14.

[0058] Then, the inlet and outlet of the valve body 25 are connected to the hydraulic system, and the mover 1 of the electro-mechanical converter is connected to the control system. The control system inputs an electrical signal to the mover 1 of the electro-mechanical converter, which drives the rolling diaphragm 5 through the drive push rod 3. Based on Pascal's principle, the output force is amplified by the hydraulic pressure and transmitted to the corrugated diaphragm 7, and finally pushes the valve core 24 to move. When the hydrostatic amplifier described in this invention is working, the pressure of the liquid in the liquid chamber sleeve 9 is transmitted to the one-way valve core 13 through the through hole in the center of the liquid replenishing screw plug 11. The one-way valve core 13 is subjected to force, which makes it more reliable in contact with the one-way valve sealing ring 14 to ensure a seal.

[0059] When there is no load, if the liquid chamber sleeve 9 leaks, the rolling diaphragm 5 and the corrugated diaphragm 7 will be recessed inward. By moving the liquid replenishing screw 11 downward, the cavity of the liquid chamber sleeve 9 can be filled, which can play a role in replenishing the liquid.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve-type combined diaphragm hydrostatic amplifier with fluid replenishment capability, characterized in that, Includes drive push rod, rolling diaphragm, corrugated diaphragm, liquid chamber sleeve, liquid chamber sleeve cover, replenishing screw plug, replenishing screw plug cover, one-way valve core and one-way valve spring; The liquid cavity sleeve has a cavity inside, with a small through hole and a large through hole on both sides of the cavity, and a liquid replenishment port on the top. The rolling diaphragm is fixedly installed on the outside of the small through hole; the rolling diaphragm is fixedly connected to the drive push rod; the corrugated diaphragm is located on the outside of the large through hole and fixedly installed on the valve core, the valve core is installed on the valve body, the valve body is fixedly installed on the liquid chamber sleeve and the corrugated diaphragm is pressed and fixed between the valve body and the liquid chamber sleeve; The liquid cavity sleeve cover is fixedly installed on the liquid inlet and is provided with a threaded hole. The large-diameter end of the liquid inlet plug passes through the liquid cavity sleeve cover and extends into the liquid inlet, and is clearance-fitted with the inner wall of the liquid inlet. The liquid inlet plug is installed in the threaded hole through the external thread provided in the middle. The small-diameter end of the replenishing plug is provided with an external thread and a countersunk hole I. The lower part of the one-way valve core is installed in the countersunk hole I through the one-way valve spring. The replenishing plug cover is provided with a countersunk hole II, and the countersunk hole II is provided with an internal thread. The replenishing plug cover is fixedly installed on the small-diameter end of the replenishing plug through the internal thread and the external thread. The countersunk hole I and the countersunk hole II are connected. The top of the replenishing plug cover is provided with a replenishing plug cover vent hole connected to the countersunk hole II. The upper part of the one-way valve core is located in the countersunk hole II, and there is a gap between the side of the valve core and the countersunk hole I and the countersunk hole II. The top can control the opening and closing of the replenishing plug cover vent hole and the countersunk hole II. The liquid replenishment plug has a through hole inside, and the two ends of the through hole are respectively connected to the countersunk hole I and the cavity.

2. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier according to claim 1, characterized in that, The rolling diaphragm is fixedly installed on the outside of the small through hole by a rolling diaphragm fixing flange and a liquid cavity sleeve screw. The rolling diaphragm fixing flange is provided with a rolling diaphragm fixing flange groove, and the rolling diaphragm is provided with a protrusion I that engages with the rolling diaphragm fixing flange groove. The corrugated diaphragm is fixedly installed on the valve core by a corrugated diaphragm screw, and a corrugated diaphragm gasket is provided between the corrugated diaphragm and the valve core. The valve body is fixedly installed on the liquid cavity sleeve by the liquid cavity sleeve screw. The end face of the valve body that contacts the corrugated diaphragm is provided with a valve body groove, and the corrugated diaphragm is provided with a protrusion II that engages with the valve body groove.

3. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier according to claim 1, characterized in that, The portion of the replenishing plug that extends into the replenishing port is provided with a first sealing groove and a second sealing groove. A first sealing ring and a second sealing ring are respectively installed in the first sealing groove and the second sealing groove. The first sealing ring and the second sealing ring are located between the replenishing plug and the inner wall of the replenishing port.

4. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier according to claim 1, characterized in that, The small-diameter end of the replenishing plug and the external threaded connection in the middle are prismatic structures, and a combined sealing ring for the small-diameter end of the replenishing plug is provided between the bottom surface of the replenishing plug cap and the prismatic structure.

5. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier according to claim 1, characterized in that, A one-way valve sealing ring is provided between the top of the one-way valve core and the liquid replenishment plug cap, and a one-way valve sealing groove for installing the one-way valve sealing ring is provided on the top of the one-way valve core.

6. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier according to claim 1, characterized in that, The liquid chamber sleeve, the liquid chamber sleeve cover, the liquid replenishing plug, the liquid replenishing plug cover, the one-way valve core, the one-way valve spring, the valve core and the valve body are made of stainless steel, and the rolling diaphragm and the corrugated diaphragm are made of flexible material.

7. The fluid-replenishable valve-type combined diaphragm hydrostatic amplifier according to claim 1, characterized in that, The drive push rod is fixedly connected to the mover of the electromechanical converter by a thread. The stator of the electromechanical converter is connected to the rolling diaphragm fixing flange by a connecting flange. The connecting flange is connected to the stator of the electromechanical converter by a connecting flange screw and to the rolling diaphragm fixing flange by a liquid cavity sleeve screw.

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