Diaphragm structure of diaphragm compressor

Abstract

The utility model relates to the technical field of diaphragm compressors, in particular to a diaphragm compressor diaphragm structure which comprises a cylinder cover and a cylinder body connected to the cylinder cover. The diaphragm assembly is arranged between the cylinder cover and the cylinder body, and the diaphragm assembly comprises a gas side diaphragm, a middle diaphragm and an oil side diaphragm; the detection assembly is arranged on the diaphragm assembly and used for detecting the axial and radial relative displacement between the diaphragms, the diaphragm assembly comprises a plurality of connecting rods, the connecting rods are arranged between the adjacent diaphragms, the connecting rods are connected with the diaphragms in a multi-direction rotating mode, and the connecting rods can stretch out and draw back in the length direction of the connecting rods; the diaphragm is provided with a detection piece used for detecting the inclined state of the connecting rod. The detection assembly is additionally arranged between the diaphragms, and the axial and radial displacement between the diaphragms can be accurately judged in real time according to the deviation state of the connecting rod and the change of the detection quantity of the pressure sensors when the diaphragms relatively displace.

Description

Technical Field

[0001] This application relates to the technical field of diaphragm compressors, and particularly to a diaphragm structure of a diaphragm compressor. Background Art

[0002] The diaphragm of a diaphragm compressor completely separates the gas chamber from the oil chamber, forming a closed cavity composed of the cylinder head curved surface and the diaphragm, resulting in very excellent sealing performance.

[0003] During the operation of a diaphragm compressor, affected by the pressure difference on both sides of the diaphragm, temperature changes, mechanical vibrations, and fluid movements during the operation, radial or axial position changes may occur. The operating state and position of the diaphragm are directly related to the operating state of the diaphragm compressor. If the displacement of the diaphragm is insufficient, that is, the deflection change of the diaphragm is small and the diaphragm cannot contact the wall surface of the cylinder membrane cavity, it will increase the clearance volume in the cylinder, reduce the suction volume of the compressor, and lower the utilization rate of the working volume of the cylinder, seriously reducing the production capacity of the diaphragm compressor. Therefore, real-time monitoring of the operating position of the diaphragm is crucial for the operation monitoring of the diaphragm compressor. Utility Model Content

[0004] The technical problem to be solved by this utility model is: it is difficult to monitor the operating state of the diaphragm in real time.

[0005] To this end, this utility model provides a diaphragm structure of a diaphragm compressor.

[0006] The technical solution adopted by this utility model to solve its technical problems is:

[0007] A diaphragm structure of a diaphragm compressor includes:

[0008] A cylinder head and a cylinder body connected to the cylinder head;

[0009] A diaphragm assembly, the diaphragm assembly is arranged between the cylinder head and the cylinder body, and the diaphragm assembly includes a gas-side diaphragm, an intermediate diaphragm, and an oil-side diaphragm;

[0010] A detection assembly, the detection assembly is arranged on the diaphragm assembly for detecting the axial and radial relative displacements between the diaphragms.

[0011] Further, the diaphragm assembly includes connecting rods, there are multiple connecting rods, the connecting rods are arranged between adjacent diaphragms, the connecting rods are rotatably connected to the diaphragms in multiple directions, the connecting rods can expand and contract along their length directions, and detection pieces for detecting the inclination state of the connecting rods are arranged on the diaphragms.

[0012] Furthermore, the diaphragm assembly includes three detection rings respectively disposed on the gas-side diaphragm, the intermediate diaphragm, and the oil-side diaphragm. The diameter of the detection ring can vary, and the connecting rod is disposed between the detection rings on adjacent diaphragms.

[0013] Furthermore, the detection ring is an annular structure formed by hinging a plurality of connecting rods to each other.

[0014] Furthermore, the three detection rings are respectively a first detection ring and a second detection ring. The first detection ring and the second detection ring are alternately arranged, and the first detection ring and the second detection ring cooperate to monitor the relative displacement between the diaphragms.

[0015] Furthermore, on the side wall of each connecting rod of the first detection ring facing the second detection ring, a slot is provided. One end of the connecting rod is multi-directionally hinged to the bottom of the slot, and the other end is multi-directionally hinged to the second detection ring. The detection member is a pressure sensor, and a plurality of the pressure sensors are circumferentially arranged on the inner side wall of the slot.

[0016] Furthermore, the pressure sensor is disposed near the notch of the slot.

[0017] Furthermore, a buffer pad is provided between the pressure sensor and the inner side wall of the slot, and the buffer pad has elasticity.

[0018] Furthermore, the connecting rod includes a plug rod and a sleeve. The opening of the sleeve faces the plug rod. The sleeve is hinged to the bottom of the slot, the plug rod is inserted into the sleeve, and a spring is connected between the plug rod and the inner bottom of the sleeve.

[0019] Furthermore, the diaphragm assembly is hermetically connected to the cylinder block and the cylinder head through a sealing ring, and the detection ring is disposed near the inner ring of the sealing ring.

[0020] The beneficial effect of the present utility model is that by adding a detection component between the diaphragms in this application, using the offset state of the connecting rod and the change in the detection quantity of a plurality of pressure sensors when there is a relative displacement between the diaphragms, the axial and radial displacements between the diaphragms can be judged in real time and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0022] Figure 1 is a schematic structural diagram of the diaphragm structure of the diaphragm compressor in the present utility model.

[0023] Figure 2 is a schematic structural diagram of the detection ring in the present utility model.

[0024] Figure 3 is a schematic structural diagram of the connecting rod in the present utility model.

[0025] In the figure: 1. Cylinder head; 2. Cylinder block; 3. Diaphragm assembly; 31. Gas-side diaphragm; 32. Intermediate diaphragm; 33. Oil-side diaphragm; 34. Sealing ring; 4. Detection assembly; 41. Detection ring; 411. First detection ring; 412. Second detection ring; 42. Connecting rod; 43. Connecting rod; 431. Sleeve; 432. Plug rod; 433. Spring; 44. Embedded groove; 45. Pressure sensor; 46. Buffer pad. Specific embodiments

[0026] The present utility model will now be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Refer to Figures 1-3 , a diaphragm structure of a diaphragm compressor, the displacement monitoring device is arranged on the diaphragm assembly 3, the diaphragm assembly 3 is fixedly connected between the cylinder head 1 and the cylinder block 2, the diaphragm assembly 3 includes a gas-side diaphragm 31, an intermediate diaphragm 32 and an oil-side diaphragm 33 arranged in sequence between the cylinder head 1 and the cylinder block 2, wherein, the oil-side diaphragm 33 is arranged on the side close to the cylinder block 2.

[0030] It should be noted that the gas-side diaphragm 31, the intermediate diaphragm 32, and the oil-side diaphragm 33 are coaxially arranged. The edges of the gas-side diaphragm 31, the intermediate diaphragm 32, and the oil-side diaphragm 33 are connected together by a sealing ring 34. The sealing ring 34 is hermetically connected to the cylinder head 1 and the cylinder block 2. A detection assembly 4 is provided on the diaphragm assembly 3.

[0031] The detection assembly 4 includes three detection rings 41 respectively arranged on the gas-side diaphragm 31, the intermediate diaphragm 32, and the oil-side diaphragm 33. The three detection rings 41 are respectively the first detection ring 411 and the second detection ring 412. The first detection ring 411 and the second detection ring 412 are arranged alternately. The first detection ring 411 and the second detection ring 412 cooperate to monitor the relative displacement between the diaphragms. In this embodiment, the first detection rings 411 are arranged on both the gas-side diaphragm 31 and the oil-side diaphragm 33, and the second detection ring 412 is arranged on the intermediate diaphragm 32. In other embodiments, it may also be that the first detection ring 411 is arranged on the intermediate diaphragm 32, and the second detection rings 412 are arranged on the gas-side diaphragm 31 and the oil-side diaphragm 33.

[0032] Both the first detection ring 411 and the second detection ring 412 are annular structures formed by multiple connecting rods 42 hinged to each other. The diameter of this annular structure can be changed, and this annular structure is arranged close to the inner ring of the sealing ring 34. Among them, on the side wall of each connecting rod 42 of the first detection ring 411 facing the second detection ring 412, an embedding groove 44 is provided. The bottom of the embedding groove 44 is multi-directionally hinged with a connecting rod 43. The outer diameter of the connecting rod 43 is adapted to the inner diameter of the embedding groove 44. A detection piece for detecting the inclination state of the connecting rod 43 is provided on the first detection ring 411. Along the circumferential direction of the inner side wall of the embedding groove 44, a plurality of pressure sensors 45 are provided. The pressure sensors 45 are located between the connecting rod 43 and the embedding groove 44. The pressure sensors 45 are arranged close to the notch of the embedding groove 44. A buffer pad 46 is provided between the pressure sensors 45 and the inner side wall of the embedding groove 44. The buffer pad 46 has elasticity, and the buffer pad 46 can be made of rubber material. Among them, the connecting rod 43 can expand and contract along its length direction. The connecting rod 43 includes an inserting rod 432 and a sleeve 431. The opening of the sleeve 431 faces the inserting rod 432. The sleeve 431 is hinged to the bottom of the embedding groove 44. The inserting rod 432 is inserted into the sleeve 431, and a spring 433 is connected between the inserting rod 432 and the inner bottom of the sleeve 431.

[0033] When the diaphragms are all in the natural state and the first detection ring 411 and the second detection ring 412 are in the state with the smallest diameter, the first detection ring 411 and the second detection ring 412 face each other. The end of the inserting rod 432 away from the sleeve 431 is connected to the second detection ring 412. At this time, the axial direction of the connecting rod 43 is parallel to the axial direction of the diaphragm assembly 3. The connection method between the inserting rod 432 and the second detection ring 412 can adopt multi-directional hinge.

[0034] The implementation principle of this application is as follows:

[0035] When the diaphragm undergoes axial displacement under the action of axial pressure or tension, the diaphragm will bulge towards the cylinder head 1 side or the cylinder block 2 side. At this time, the detection ring 41 will deform along with the diaphragm, and the diameter of the detection ring 41 will increase accordingly. If the axial displacements between adjacent diaphragms are inconsistent, the diameters of adjacent detection rings 41 will be inconsistent, so that the connecting rod 43 will be evenly in a state of tilting outwards or inwards. At this time, the pressure values displayed by multiple pressure sensors 45 in the slot 44 close to the axis of the detection ring 41 or far from the axis of the detection ring 41 are similar or the same.

[0036] If relative displacement occurs in the radial direction between the diaphragms due to pressure difference or temperature change, then compared with the state of evenly tilting outwards or inwards, the multiple connecting rods 43 will tilt towards one side, and the pressure values detected by the multiple pressure sensors 45 will be inconsistent. According to the change of the pressure value, the relative displacement state between the diaphragms can be judged. Furthermore, according to the magnitude and change trend of the pressure value, the relative displacement amount between the diaphragms can be judged.

[0037] In this application, by arranging the detection component 4 between the diaphragms, and using the offset state of the connecting rod 43 and the change of the detection amount of the multiple pressure sensors 45 when relative displacement occurs between the diaphragms, the axial and radial displacements between the diaphragms can be judged in real time and accurately.

[0038] Inspired by the above ideal embodiments according to the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A diaphragm compressor diaphragm structure, characterized in that: include, A cylinder head (1), and a cylinder body (2) connected to the cylinder head (1); A diaphragm assembly (3), the diaphragm assembly (3) being arranged between the cylinder head (1) and the cylinder body (2), the diaphragm assembly (3) comprising an air-side diaphragm (31), an intermediate diaphragm (32) and an oil-side diaphragm (33); A detection component (4), wherein the detection component (4) is arranged on the diaphragm component (3) and is used to detect axial and radial relative displacements between the diaphragms; The detection assembly (4) comprises a connecting rod (43), a plurality of the connecting rods (43) are provided, the connecting rods (43) are provided between adjacent diaphragms, the connecting rods (43) are multi-directionally rotatably connected to the diaphragms, the connecting rods (43) can be extended and retracted along their length direction, and a detection member for detecting the tilt state of the connecting rods (43) is provided on the diaphragms; The detection assembly (4) further comprises three detection rings (41) respectively arranged on the air side diaphragm (31), the middle diaphragm (32) and the oil side diaphragm (33); the diameter of the detection rings (41) can be changed; and the connecting rod (43) is arranged between the detection rings (41) on adjacent diaphragms.

2. The diaphragm compressor diaphragm structure according to claim 1, characterized in that: The detection ring (41) is an annular structure formed by a plurality of connecting rods (42) being hinged to each other.

3. The diaphragm compressor diaphragm structure according to claim 2, characterized in that: The three detection rings (41) are respectively a first detection ring (411) and a second detection ring (412); the first detection rings (411) and the second detection rings (412) are arranged alternately; the first detection rings (411) and the second detection rings (412) cooperate to monitor the relative displacement between the diaphragms.

4. The diaphragm compressor diaphragm structure according to claim 3, characterized in that: Each connecting rod (42) on the first detection ring (411) is provided with an embedding groove (44) on the side wall facing the second detection ring (412); one end of the connecting rod (43) is multi-directionally hinged to the bottom of the embedding groove (44), and the other end is multi-directionally hinged to the second detection ring (412); the detection component is a pressure sensor (45), and a plurality of the pressure sensors (45) are circumferentially arranged on the inner side wall of the embedding groove (44).

5. The diaphragm compressor diaphragm structure according to claim 4, characterized in that: The pressure sensor (45) is arranged close to the notch of the embedding groove (44).

6. The diaphragm compressor diaphragm structure according to claim 4, characterized in that: A buffer pad (46) is provided between the pressure sensor (45) and the inner side wall of the embedding groove (44), and the buffer pad (46) is elastic.

7. The diaphragm compressor diaphragm structure according to claim 1, characterized in that: The connecting rod (43) comprises an insertion rod (432) and a sleeve (431), the opening of the sleeve (431) is arranged toward the insertion rod (432), the sleeve (431) is hinged to the bottom of the embedding groove (44), the insertion rod (432) is inserted in the sleeve (431), and a spring (433) is connected between the insertion rod (432) and the bottom of the sleeve (431).

8. The diaphragm compressor diaphragm structure according to claim 1, characterized in that: The diaphragm assembly (3) is sealedly connected to the cylinder body (2) and the cylinder cover (1) via a sealing ring (34), and the detection ring (41) is arranged close to the inner ring of the sealing ring (34).

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