Diaphragm head assembly and diaphragm compressor

Abstract

The application relates to a diaphragm head assembly and a diaphragm compressor. The diaphragm head assembly comprises a cylinder, a guide oil disc, an oil distribution disc, a cylinder cover and a diaphragm. The cylinder is provided with a first channel and a chamber which are connected with each other. The guide oil disc is arranged in the chamber and is opposite to the first channel in the axial direction of the guide oil disc. The guide oil disc is spaced apart from the wall surface of the chamber so that an oil distribution area is defined between the surface of the guide oil disc and the opposite wall surface of the chamber. The oil distribution disc is provided with a first through hole and an oil side diaphragm chamber which are connected with each other. The oil distribution disc is arranged on the side of the guide oil disc which is away from the first channel in the axial direction of the guide oil disc. The oil distribution disc is spaced apart from one side of the guide oil disc. The first through hole is communicated with the oil distribution area. The cylinder cover is connected with the cylinder. The diaphragm head assembly can avoid the center of the diaphragm being first attached to the wall surface of the gas side diaphragm chamber before the edge of the diaphragm, thereby avoiding the problem that the gas in the gas side diaphragm chamber cannot be completely discharged during the compression of the exhaust gas, reducing the clearance volume of the diaphragm compressor and improving the volumetric efficiency of the diaphragm compressor.

Description

Technical Field

[0001] This invention relates to the field of diaphragm compressor technology, and in particular to a membrane head assembly and a diaphragm compressor. Background Technology

[0002] A diaphragm compressor is an industrial production device that uses a piston to drive hydraulic oil, which in turn deforms a metal diaphragm to compress and transport gas. During operation, the deformation pattern of the diaphragm significantly impacts its efficiency. Generally, the exhaust port of a diaphragm compressor is located at the center of the gas-side diaphragm head. If, during exhaust, the center of the diaphragm first contacts the surface of the gas-side diaphragm cavity, blocking the exhaust port, a large amount of gas will be trapped inside. This effectively increases the compressor's clearance volume, reducing its volumetric efficiency, causing the compressor's efficiency to fall far short of its design value. This situation is particularly pronounced in compressors with large-diaphragm heads. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a diaphragm head assembly that prevents the center of the diaphragm from adhering to the wall of the gas-side diaphragm cavity before the edge of the diaphragm, thereby avoiding the problem of incomplete gas discharge from the gas-side diaphragm cavity during the compression and exhaust process of the diaphragm compressor. This reduces the clearance volume of the diaphragm compressor, improves its volumetric efficiency, and enhances its overall operating efficiency.

[0004] An embodiment of the present invention provides a diaphragm compressor.

[0005] The membrane head assembly of this invention includes:

[0006] The cylinder body is provided with a first channel and a chamber that are connected to each other;

[0007] An oil guide plate is disposed in the chamber, the oil guide plate is opposite to the first channel in its axial direction, and the oil guide plate is spaced apart from the wall of the chamber so that an oil distribution area is defined between the surface of the oil guide plate and the opposite wall of the chamber.

[0008] An oil distribution plate is provided with a first through hole and an oil-side film cavity that are connected. The oil distribution plate is located on the side of the oil guide plate that is axially opposite to the first channel. The oil distribution plate is spaced apart from the side of the oil guide plate. The first through hole is connected to the oil distribution area.

[0009] Cylinder head, having a gas-side diaphragm cavity opposite to the oil-side diaphragm cavity, the cylinder head being connected to the cylinder block; and

[0010] A diaphragm is disposed between the cylinder head and the cylinder body.

[0011] The oil guide plate of the diaphragm head assembly in this embodiment of the invention changes the flow direction of hydraulic oil in the area between the first channel and the distribution plate, causing the hydraulic oil to flow along the edge of the distribution plate to the center of the distribution plate. This allows the diaphragm to adhere to the wall of the gas-side diaphragm cavity from its edge to the center, preventing the center of the diaphragm from adhering to the wall of the gas-side diaphragm cavity before the edge of the diaphragm. This prevents the gas in the gas-side diaphragm cavity from being completely discharged during the compression and exhaust process of the diaphragm compressor, reduces the clearance volume of the diaphragm compressor, improves the volumetric efficiency of the diaphragm compressor, and improves the working efficiency of the diaphragm compressor.

[0012] In some embodiments, the center of the oil guide plate is opposite the first channel in its axial direction, and the axial dimension of the oil guide plate gradually decreases from the center to the edge.

[0013] In some embodiments, the oil guide plate is provided with a plurality of guide grooves, which extend from the middle of the oil guide plate to the edge of the oil guide plate and are distributed at equal intervals along the circumference of the oil guide plate.

[0014] In some embodiments, the extension path of the guide channel is arc-shaped.

[0015] In some embodiments, the membrane head assembly further includes a connector, the connector comprising:

[0016] A connecting plate, which is connected to the oil guide plate, and the connecting plate is provided with a first mounting hole extending upward along the axial direction of the oil guide plate;

[0017] A spacer block, wherein the spacer block is disposed between the connecting plate and the oil distribution plate, and the spacer block is provided with a second mounting hole, the second mounting hole corresponding axially to the first mounting hole on the oil guide plate; and

[0018] A connecting screw, one end of which passes through the first mounting hole and the second mounting hole and is connected to the oil distribution plate.

[0019] In some embodiments, the connecting plate has a countersunk hole at the end of the first mounting hole opposite to the oil distribution plate, and the other end of the connecting screw is fitted into the countersunk hole.

[0020] In some embodiments, the oil distribution plate and the oil guide plate are coaxial, and the oil guide plate has a unidirectional through hole extending upward along its axial direction in the middle.

[0021] The diaphragm head assembly further includes a unidirectional guide member disposed within the unidirectional guide hole so that hydraulic oil flows from one side of the guide plate through the unidirectional guide hole to the other side of the guide plate in its axial direction.

[0022] In some embodiments, the unidirectional through-hole includes a large-diameter section, a medium-diameter section, and a small-diameter section connected in sequence, wherein the large-diameter section is adjacent to the first channel;

[0023] The unidirectional conduction element includes:

[0024] A base, which fits within the large-diameter section, is provided with a second through hole extending along its axial direction;

[0025] An elastic element, wherein the elastic element is disposed within the intermediate diameter section, and one end of the elastic element is connected to the base; and

[0026] A valve plate is connected to the other end of the elastic element. The valve plate can move between a disconnected position that can block the small diameter section and a conductive position that can be spaced apart from the small diameter section. When the valve plate is in the conductive position, the small diameter section is connected to the second through hole through the middle diameter section.

[0027] In some embodiments, the valve plate is provided with a third through hole, which is spaced apart from the small diameter section in the axial direction of the oil guide plate, and the valve plate is clearance-fitted with the medium diameter section.

[0028] The diaphragm compressor of this invention includes the membrane head assembly described in any of the above embodiments.

[0029] The diaphragm compressor of this invention can avoid the problem that the gas in the gas-side membrane cavity cannot be completely discharged during the compression and exhaust process, reduce the clearance volume of the diaphragm compressor, improve the volumetric efficiency of the diaphragm compressor, and improve the working efficiency of the diaphragm compressor. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a diaphragm compressor according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the oil guide plate and connecting plate according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the oil guide plate and the unidirectional guide component according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the base according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the valve plate structure according to an embodiment of the present invention;

[0035] Figure label:

[0036] Diaphragm compressor 1000;

[0037] Membrane head assembly 100;

[0038] Cylinder 1, chamber 11, conical wall 111, circumferential wall 112;

[0039] Oil guide plate 2, flow guide groove 21, unidirectional guide hole 22, large diameter section 221, medium diameter section 222, small diameter section 223, conical surface 23, circumferential surface 24;

[0040] Oil distribution plate 3, first through hole 31, oil side diaphragm chamber 32, cylinder head 4, air side diaphragm chamber 41, diaphragm 5, connector 6, connecting plate 61, first mounting hole 611, countersunk hole 612, pad 62, connecting screw 63.

[0041] One-way guide 7, base 71, second through hole 711, threaded hole 712, elastic element 72, valve plate 73, third through hole 731;

[0042] Drive unit 200, cylinder liner 2001, piston 2002. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] like Figures 1 to 5 As shown, the diaphragm compressor 1000 of this embodiment includes a diaphragm head assembly 100. The diaphragm head assembly 100 includes a cylinder body 1, an oil guide plate 2, an oil distribution plate 3, a cylinder head 4, and a diaphragm 5.

[0045] The cylinder block 1 has a first channel and a chamber 11 that are connected. An oil guide plate 2 is disposed within the chamber 11, and the oil guide plate 2 is positioned along its axial direction (e.g., ...). Figure 1 The oil distribution plate 3 is positioned opposite the first channel in the left-right direction (as shown in the image). The oil guide plate 2 is spaced apart from the wall of the chamber 11 so that an oil distribution area is defined between the surface of the oil guide plate 2 and the opposite wall of the chamber 11. The oil distribution plate 3 has a connected first through hole 31 and an oil-side membrane cavity 32. The oil distribution plate 3 is located on the side of the oil guide plate 2 that is axially opposite to the first channel (e.g., in the left-right direction). Figure 1 (Right side of the image), that is, the oil guide plate 2 is located axially between the first channel and the oil distribution plate 3, with the oil distribution plate 3 spaced apart from one side of the oil guide plate 2, and the first through hole 31 communicating with the oil distribution area. The cylinder head 4 has a gas-side diaphragm cavity 41, which is opposite to the oil-side diaphragm cavity 32, and the cylinder head 4 is connected to the cylinder block 1. The diaphragm 5 is disposed between the cylinder head 4 and the cylinder block 1.

[0046] The diaphragm compressor 1000 also includes a drive unit 200, which has a cylinder liner 2001 and a piston 2002. The piston 2002 is movably disposed in the cylinder liner 2001 between a lower position and an upper position. The cylinder liner 2001 is disposed on the cylinder body 1 and is connected to the first channel.

[0047] When the diaphragm compressor 1000 is in use, hydraulic oil is provided in the side of the piston 2002 facing the diaphragm head assembly 100 inside the cylinder liner 2001 and in the chamber 11 of the cylinder body 1. As the piston 2002 moves from the lower position to the upper position, the piston 2002 pushes the hydraulic oil towards the diaphragm 5 (e.g., Figure 1 The flow (from left to right) moves the diaphragm 5, causing it to deform towards the gas-side membrane cavity 41 and adhere to the wall of the gas-side membrane cavity 41, thus completing the compression and discharge of gas in the gas-side membrane cavity 41. When the piston 2002 moves from the upper position to the lower position, the piston 2002 drives the hydraulic oil to move in the direction away from the diaphragm 5 (e.g., from right to left in the figure), causing the diaphragm 5 to deform towards the oil-side membrane cavity 32 and adhere to the wall of the oil-side membrane cavity 32, thus completing the intake of gas in the gas-side membrane cavity 41.

[0048] During the process of piston 2002 pushing hydraulic oil to flow towards diaphragm 5, since guide plate 2 is located axially between first channel and distribution plate 3, guide plate 2 obstructs the straight flow of hydraulic oil between first channel and distribution plate 3. Guide plate 2 changes the flow direction of hydraulic oil in the area between first channel and distribution plate 3. Under the action of guide plate 2, hydraulic oil flows from first channel to the edge of guide plate 2, that is, hydraulic oil flows along distribution area. Then, hydraulic oil flows from all sides of guide plate 2 to this side of guide plate 2, and then hydraulic oil flows from this side of guide plate 2 and the gap between distribution plate 3 to the first through hole 31 on distribution plate 3, thereby flowing towards diaphragm 5. Since the hydraulic oil flows from the periphery of the guide plate 2 to the gap between this side of the guide plate 2 and the distribution plate 3, the hydraulic oil flows from the edge of the distribution plate 3 to the center of the distribution plate 3. Therefore, the hydraulic oil preferentially acts on the diaphragm 5 through the first through hole 31 located at the edge of the distribution plate 3. Thus, the order of force on the diaphragm 5 is from the edge of the diaphragm 5 to the center of the diaphragm 5. The order of deformation of the diaphragm 5 caused by the flow of hydraulic oil (change in hydraulic oil pressure) is from the edge of the diaphragm 5 to the center of the diaphragm 5. This causes the diaphragm 5 to gradually adhere to the wall of the gas-side diaphragm cavity 41 from its edge to the center, thereby realizing the discharge of gas in the gas-side diaphragm cavity 41.

[0049] Therefore, the oil guide plate 2 of the diaphragm head assembly 100 in this embodiment of the invention changes the flow direction of hydraulic oil in the area between the first channel and the oil distribution plate 3, so that the hydraulic oil flows along the edge of the oil distribution plate 3 to the center of the oil distribution plate 3, so that the diaphragm 5 adheres to the wall of the gas-side diaphragm cavity 41 from its edge to the center. This can prevent the center of the diaphragm 5 from adhering to the wall of the gas-side diaphragm cavity 41 before the edge of the diaphragm 5, thereby avoiding the problem that the gas in the gas-side diaphragm cavity 41 cannot be completely discharged during the compression and exhaust process of the diaphragm compressor 1000, reducing the clearance volume of the diaphragm compressor 1000, improving the volumetric efficiency of the diaphragm compressor 1000, and improving the working efficiency of the diaphragm compressor 1000.

[0050] To make the solution in this application easier to understand, we will take the example where the axial direction of the oil guide plate 2 is the same as the left-right direction. The left-right direction is as follows: Figure 1 and Figure 3 As shown.

[0051] The diaphragm compressor 1000 of this embodiment includes a drive unit and a membrane head assembly 100.

[0052] The drive unit has a cylinder liner 2001 and a piston 2002, the piston 2002 being movably disposed in the cylinder liner 2001 between a lower position and an upper position.

[0053] The diaphragm head assembly 100 includes a cylinder body 1, an oil guide plate 2, an oil distribution plate 3, a connector 6, a one-way guide 7, a cylinder head 4, and a diaphragm 5.

[0054] The cylinder body 1 is provided with a first channel and a chamber 11 that are connected. The cylinder liner 2001 is provided on the cylinder body 1 and is connected to the first channel.

[0055] The oil distribution plate 3 is provided with a first through hole 31 and an oil-side diaphragm cavity 32 that are connected to each other. The first through hole 31 is connected to the chamber 11 of the cylinder block 1. The cylinder head 4 has a gas-side diaphragm cavity 41, which is opposite to the oil-side diaphragm cavity 32. A diaphragm 5 is provided between the cylinder head 4 and the cylinder block 1. The cylinder head 4 and the cylinder block 1 are connected by studs 8. The cylinder head 4 and the cylinder block 1 press the oil distribution plate 3 and the diaphragm 5 together.

[0056] The oil guide plate 2 is disposed in the chamber 11. The oil guide plate 2 is opposite to the first channel in its axial direction. The oil guide plate 2 is located between the first channel and the oil distribution plate 3 in its axial direction. The oil guide plate 2 is spaced apart from the wall of the chamber 11 so that the oil distribution area is defined between the surface of the oil guide plate 2 and the opposite wall of the chamber 11. The oil distribution plate 3 is spaced apart from the side of the oil guide plate 2. The first through hole 31 communicates with the oil distribution area.

[0057] When piston 2002 moves from the lower position to the upper position, hydraulic oil flows from the first channel to the edge of the guide plate 2, and then flows into the gap between that side of the guide plate 2 and the distribution plate 3. The hydraulic oil flows along the edge of the distribution plate 3 towards its center, and acts on the diaphragm 5 through the multiple first through holes 31 on the distribution plate 3. When piston moves from the upper position to the lower position, hydraulic oil flows from the oil-side diaphragm cavity through the first through holes into the gap between that side of the guide plate 2 and the distribution plate 3, and then flows through the guide plate 2 to the first channel.

[0058] Specifically, the oil guide plate 2 and the oil distribution plate 3 are arranged coaxially, and the diameter of the oil guide plate 2 is 20-30mm smaller than the diameter of the oil distribution plate 3.

[0059] In some embodiments, the connector 6 includes a connecting plate 61, a pad 62, and a connecting screw 63. The connecting plate 61 is connected to the oil guide plate 2, and has a first mounting hole 611 extending axially along the oil guide plate 2. The pad 62 is disposed between the connecting plate 61 and the oil distribution plate 3, and has a second mounting hole corresponding axially to the first mounting hole 611 on the oil guide plate 2. One end (right end) of the connecting screw 63 passes through the first mounting hole 611 and the second mounting hole and connects to the oil distribution plate 3. The connector 6 has a simple structure, facilitates the connection operation between the oil guide plate 2 and the oil distribution plate 3, and provides a strong connection.

[0060] Specifically, there are multiple connectors 6, and the connecting plates 61 of the multiple connectors 6 are evenly distributed along the circumference of the oil guide plate 2 on the edge of the oil guide plate 2.

[0061] In some embodiments, each of the connector 6 and the pad 62 is spaced apart from the wall of the chamber 11 of the cylinder body 1, thereby preventing the connector 6 from blocking the connection of the oil distribution area, avoiding the formation of a dead zone for hydraulic oil flow, and increasing the flow rate of hydraulic oil in the oil distribution area.

[0062] Optionally, the connecting plate 61 is welded to the oil guide plate 2, or the connecting plate 61 and the oil guide plate 2 are integrally formed.

[0063] Furthermore, the connecting plate 61 has a countersunk hole 612 at the end (left end) of the first mounting hole 611 opposite to the oil distribution plate 3. The other end (left end) of the connecting screw 63 fits into the countersunk hole 612. That is, the other end of the connecting screw 63 does not protrude from the end of the connecting plate 61, thereby avoiding the connecting screw 63 from causing resistance to the flow of hydraulic oil and avoiding the other end of the connecting screw 63 from causing disturbance to the flow direction of hydraulic oil. This further improves the flow speed of hydraulic oil in the oil distribution area, thereby increasing the heat exchange efficiency between hydraulic oil and diaphragm 5 during the operation of the diaphragm compressor 1000 and the heat exchange efficiency of the cooling components (this part is prior art and is omitted in this application) on the hydraulic oil. This prevents the hydraulic oil from overheating and affecting the life of the diaphragm 5. The operation of the diaphragm 5 at normal temperature also helps to further improve the volumetric efficiency of the diaphragm compressor 1000.

[0064] In some embodiments, the middle portion of the oil guide plate 2 is opposite to the first channel in its axial direction, and the axial dimension of the oil guide plate 2 gradually decreases from the middle to the edge. The oil guide plate 2 is frustoconical in shape. (See reference...) Figure 1 and Figure 2 As shown, the middle part of the oil guide plate 2 is closer to the first channel in its axial direction than the edge of the oil guide plate 2, which can better guide the flow of hydraulic oil. In addition, the angle between the tapered surface 23 formed by the oil guide plate 2, which gradually decreases in size from the middle to the edge, and the first channel is small. This allows the hydraulic oil to gradually flow from the first channel to the edge of the oil guide plate 2, which can reduce the frictional force when the hydraulic oil flows through the gap between the tapered surface 23 of the oil guide plate 2 and the wall of the chamber 11, reduce the flow resistance of the hydraulic oil, reduce the energy loss of the hydraulic oil, thereby reducing the loss of the piston 2002's stroke volume and improving the volumetric efficiency of the piston 2002.

[0065] Specifically, see Figure 1 The conical surface 23 of the oil guide plate 2 is opposite to the conical wall surface 111 of the chamber 11, and the circumferential surface 24 of the oil guide plate 2 is opposite to the circumferential wall surface 112 of the chamber 11.

[0066] In some embodiments, the oil guide plate 2 is provided with a plurality of guide grooves 21. The guide grooves 21 extend from the middle of the oil guide plate 2 to the edge of the oil guide plate 2. One end of the guide groove 21 is located in the middle of the oil guide plate 2, and the other end of the guide groove 21 is located at the edge of the oil guide plate 2. The plurality of guide grooves 21 are distributed at equal intervals along the circumference of the oil guide plate 2. The guide groove 21 guides the flow direction of the hydraulic oil, making the hydraulic oil more evenly distributed at the edge of the guide plate 2 when it flows through the guide plate 2. This makes the hydraulic oil more evenly distributed at the edge of the distribution plate 3 when it flows through the distribution plate 3, ensuring that the deformation of the edge of the diaphragm 5 is consistent. This further ensures that the diaphragm 5 fits the wall of the gas-side diaphragm cavity 41 from its edge to the center, thereby further preventing the gas in the gas-side diaphragm cavity 41 from not being completely discharged during the compression and exhaust process of the diaphragm compressor 1000. This further reduces the clearance volume of the diaphragm compressor 1000, further improves the volumetric efficiency of the diaphragm compressor 1000, and further improves the working efficiency of the diaphragm compressor 1000.

[0067] In some embodiments, the extension path of the guide groove 21 is arc-shaped. The arc-shaped guide groove 21 is similar to the flow characteristics of liquid flowing through the guide plate 2. When the hydraulic oil flows through the conical surface 23 of the guide plate 2, it is easy to form a curved and turning flow path. The arc-shaped guide groove 21 can further reduce the flow resistance of the hydraulic oil, further reduce the energy loss of the hydraulic oil, and is more conducive to guiding the hydraulic oil, making it easier for the hydraulic oil to flow to the edge of the guide plate 2.

[0068] Furthermore, the extension line of the arc-shaped guide groove 21 is an involute. The involute is more consistent with the flow characteristics of liquid flowing through the guide plate 2, which can further reduce the flow resistance of hydraulic oil, further reduce the energy loss of hydraulic oil, and better guide the hydraulic oil, making it easier for the hydraulic oil to flow to the edge of the guide plate 2.

[0069] The oil guide plate 2 has a unidirectional through hole 22 extending axially upward in its center. A unidirectional guide member 7 is disposed in the unidirectional through hole 22 so that hydraulic oil flows from one side of the oil guide plate 2 through the unidirectional through hole 22 to the other side of the oil guide plate 2 in its axial direction. When the hydraulic oil flows from the other side of the oil guide plate 2 to that side, that is, when the piston 2002 moves from the lower position to the upper position, the unidirectional guide member 7 blocks the unidirectional through hole 22, and the unidirectional through hole 22 is not open.

[0070] When piston 2002 moves from the upper position to the lower position, it drives hydraulic oil to move in the direction away from diaphragm 5. The hydraulic oil flow path includes hydraulic oil flowing from one side of the guide plate 2 to the other side of the guide plate 2. The setting of unidirectional guide member 7 and unidirectional guide hole 22 increases the flow path of hydraulic oil from one side of the guide plate 2 to the other side of the guide plate 2, avoiding the generation of flow dead zone of hydraulic oil, thereby avoiding local high temperature caused by flow dead zone. In addition, it shortens the flow path of hydraulic oil and increases the flow speed of hydraulic oil, thereby increasing the heat exchange efficiency between hydraulic oil and diaphragm 5 during the operation of diaphragm compressor 1000 and the heat exchange efficiency of hydraulic oil by the cooling components set on diaphragm compressor. It avoids hydraulic oil overheating and affecting the life of diaphragm 5. The operation of diaphragm 5 at normal temperature is also conducive to further improving the volumetric efficiency of diaphragm compressor 1000.

[0071] In some embodiments, the unidirectional guide hole 22 includes a large-diameter section 221, a medium-diameter section 222, and a small-diameter section 223 connected in sequence. The large-diameter section 221 is adjacent to the first channel, and the small-diameter section 223 is adjacent to the oil distribution plate 3. The unidirectional guide member 7 includes a base 71, an elastic member 72, and a valve plate 73. The base 71 is fitted within the large-diameter section 221, and a second through hole 711 extending axially along the base 71 is provided on the base 71. The second through hole 711 extends axially along the oil guide plate 2. The elastic member 72 is disposed within the medium-diameter section 222, and one end of the elastic member 72 is connected to the base 71. The valve plate 73 is connected to the other end of the elastic member 72, and the valve plate 73 moves between a blocking position that can block the small-diameter section 223 and a conducting position that is spaced apart from the small-diameter section 223. When the valve plate 73 is in the conducting position, the small-diameter section 223 communicates with the second through hole 711 through the medium-diameter section 222.

[0072] The unidirectional guide member 7 uses the elastic force of the elastic element 72 to block the small diameter section 223 of the valve plate 73, so that the unidirectional guide hole 22 is closed when hydraulic oil flows from the other side (left side) to the other side (right side) of the guide plate 2. When the hydraulic oil moves away from the diaphragm 5 (the hydraulic oil moves from right to left), the hydraulic oil acts on the valve plate 73, pushing the valve plate 73 and compressing the elastic element 72, thereby connecting the small diameter section 223, the middle diameter section 222 and the second through hole of the base 71.

[0073] The unidirectional guide component 7 has a simple structure and relies on the flow direction of hydraulic oil to close or open the unidirectional guide hole 22.

[0074] In some embodiments, the base 71 is provided with external threads, and the large diameter section 221 of the unidirectional through hole 22 is provided with internal threads, and the base 71 is threadedly connected to the large diameter section 221.

[0075] Specifically, the base 71 is provided with a threaded hole 712, which extends along the axial direction of the base 71. This allows personnel to rotate the base 71 by using tools to engage with the threaded hole 712, thereby facilitating the installation and disassembly of the base 71 and the oil guide plate 2, and facilitating the maintenance of the unidirectional guide component 7.

[0076] In some other embodiments, the base 71 is provided with an internal hexagonal hole, which also makes it easier for personnel to rotate the base 71 by using an internal hexagonal wrench in conjunction with the internal hexagonal hole, thereby facilitating the installation and disassembly of the base 71 and the oil guide plate 2, and facilitating the maintenance of the unidirectional guide component 7.

[0077] Specifically, the elastic element 72 is a spring. The spring has a simple structure and is easy to install. The spring has its own through hole and gap to facilitate the connection between the small diameter section 223 and the second through hole 711.

[0078] In some embodiments, the valve plate 73 is provided with a third through hole 731, which is spaced apart from the small diameter section 223 in the axial direction of the oil guide plate 2. The valve plate 73 is clearance-fitted with the middle diameter section 222, and the wall surface of the middle diameter section 222 forms a guide and limit for the movement of the valve plate 73, so as to avoid the valve plate 73 from deflecting laterally when it moves between the blocking position and the conducting position, and to ensure the normal use of the unidirectional guide member 7.

[0079] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this invention.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0082] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A membrane head assembly, characterized in that, include: The cylinder body (1) is provided with a first channel and a chamber (11) that are connected to each other. An oil guide plate (2) is disposed in the chamber (11). The oil guide plate (2) is axially opposite to the first channel. The oil guide plate (2) is spaced apart from the wall of the chamber (11) so that an oil distribution area is defined between the surface of the oil guide plate (2) and the opposite wall of the chamber (11). The middle part of the oil guide plate (2) is axially opposite to the first channel. The size of the oil guide plate (2) in its axial direction gradually decreases from the middle to the edge. The oil distribution plate (3) is provided with a first through hole (31) and an oil-side membrane cavity (32) that are connected. The oil distribution plate (3) is located on the side of the oil guide plate (2) that is axially away from the first channel. The oil distribution plate (3) is spaced apart from the side of the oil guide plate (2). The first through hole (31) is connected to the oil distribution area. Cylinder head (4), the cylinder head (4) having a gas-side diaphragm cavity (41) opposite to the oil-side diaphragm cavity (32), the cylinder head (4) being connected to the cylinder block (1); and A diaphragm (5) is disposed between the cylinder head (4) and the cylinder body (1).

2. The membrane head assembly according to claim 1, characterized in that, The oil guide plate (2) is provided with a plurality of guide grooves (21), which extend from the middle of the oil guide plate (2) to the edge of the oil guide plate (2) and are distributed at equal intervals along the circumference of the oil guide plate (2).

3. The membrane head assembly according to claim 2, characterized in that, The extension path of the guide groove (21) is arc-shaped.

4. The membrane head assembly according to claim 1, characterized in that, The device further includes a connector (6), which comprises: A connecting plate (61) is connected to the oil guide plate (2), and the connecting plate (61) is provided with a first mounting hole (611) extending upward along the axial direction of the oil guide plate (2). A pad (62) is disposed between the connecting plate (61) and the oil distribution plate (3). The pad (62) has a second mounting hole, which corresponds axially to the first mounting hole (611) on the oil guide plate (2). A connecting screw (63) is provided, one end of which passes through the first mounting hole (611) and the second mounting hole and is connected to the oil distribution plate (3).

5. The membrane head assembly according to claim 4, characterized in that, The connecting plate (61) has a countersunk hole at one end of the first mounting hole away from the oil distribution plate (3), and the other end of the connecting screw (63) fits into the countersunk hole.

6. The membrane head assembly according to claim 1, characterized in that, The oil distribution plate (3) is coaxial with the oil guide plate (2), and the middle part of the oil guide plate (2) is provided with a unidirectional through hole (22) extending upward along its axis. The diaphragm head assembly (100) further includes a unidirectional guide (7) disposed within the unidirectional guide hole (22) so that hydraulic oil flows from one side of the guide plate (2) through the unidirectional guide hole (22) to the other side of the guide plate (2) in its axial direction.

7. The membrane head assembly according to claim 6, characterized in that, The unidirectional through hole (22) includes a large diameter section (221), a medium diameter section (222) and a small diameter section (223) connected in sequence, wherein the large diameter section (221) is adjacent to the first channel; The unidirectional conductor (7) includes: A base (71) fits within the large-diameter section (221), and the base (71) is provided with a second through hole extending along its axial direction; An elastic element (72) is disposed within the intermediate diameter section (222), one end of which is connected to the base (71); and A valve plate (73) is connected to the other end of the elastic member (72). The valve plate (73) moves between a disconnected position that can block the small diameter section (223) and a conductive position that can be spaced apart from the small diameter section (223). When the valve plate (73) is in the conductive position, the small diameter section (223) communicates with the second through hole through the middle diameter section (222).

8. The membrane head assembly according to claim 7, characterized in that, The valve plate (73) is provided with a third through hole (731), which is spaced apart from the small diameter section (223) in the axial direction of the oil guide plate (2), and the valve plate (73) is clearance-fitted with the middle diameter section (222).

9. A diaphragm compressor, characterized in that, Includes the membrane head assembly as described in any one of claims 1 to 8.

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