Annular air valve and diaphragm compressor

Abstract

The utility model provides an annular air valve and a diaphragm compressor, and relates to the technical field of diaphragm compressors, the annular air valve provided by the utility model comprises a valve seat, a valve cover, a valve plate and a spring, the valve seat is provided with a runner hole, and the valve seat is connected with the valve cover; the valve cover is sleeved with the valve plate, and the valve plate is opposite to the runner hole; the spring is mounted between the valve cover and the valve plate, and the spring has the trend of driving the valve plate to block the runner hole; the valve cover is provided with a guide structure matched with the valve plate, so that the valve plate slides along the guide structure relative to the valve cover, and the valve plate is limited to rotate around the valve cover. The valve plate is more suitable for being made of metal materials, so that the pressure resistance is improved, the valve plate can be prevented from rotating, the spring is prevented from bearing lateral force, the risk that the spring is damaged and broken is reduced, and the service life of the annular air valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm compressors, in particular to an annular air valve and a diaphragm compressor. Background Art

[0002] The diaphragm compressor valve is installed in the cylinder head on the air side. During the compressor's intake phase, the pressure differential automatically opens the intake valve, while the exhaust valve remains closed. During the compressor's exhaust phase, the exhaust valve opens, while the intake valve remains closed. The valve plate undergoes high-frequency movement within the confined space of the valve guide structure, necessitating the use of lightweight, non-metallic polyetheretherketone (PEEK) for its construction. However, as compressor performance and parameters improve, the pressure differential across the valve increases, placing the non-metallic annular valve plate at risk of fracture.

[0003] For high-pressure compressor valves, using a heavier, more pressure-resistant metal disc can improve reliability. However, during operation, the annular metal disc not only moves up and down but also rotates at high speed. This in turn subjects the spring acting on the disc to lateral forces, which can easily cause the spring to break. A broken spring not only affects compressor displacement but also compromises the safety of the diaphragm, damages the cylinder head, and increases maintenance workload and costs. Utility Model Content

[0004] The purpose of the utility model is to provide an annular air valve and a diaphragm compressor, so as to alleviate the technical problem in the prior art that the valve disc rotation causes spring damage.

[0005] In a first aspect, the present invention provides an annular gas valve comprising: a valve seat, a valve cover, a valve plate and a spring;

[0006] The valve seat is provided with a flow channel hole, and the valve seat is connected to the valve cover;

[0007] The valve plate is sleeved with the valve cover, and the valve plate is opposite to the flow channel hole;

[0008] The spring is installed between the valve cover and the valve plate, and the spring has a tendency to drive the valve plate to block the flow channel hole;

[0009] The valve cover is provided with a guide structure adapted to the valve disc, so as to enable the valve disc to slide along the guide structure relative to the valve cover and to restrict the valve disc from rotating around the valve cover.

[0010] In combination with the first aspect, the utility model provides a first possible implementation scheme of the first aspect, wherein the guide structure includes a plurality of guide protrusions arranged at intervals around the valve cover, the inner ring of the valve plate is provided with a plurality of grooves, and the plurality of guide protrusions are slidably matched with the plurality of grooves in a one-to-one correspondence.

[0011] In combination with the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the valve cover includes: an outer shell and a non-metallic lining, the outer shell is arranged outside the non-metallic lining, and the guide structure is arranged on the non-metallic lining.

[0012] In combination with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the circumferential outer side wall of the shell is provided with a plurality of side protrusions, and a notch is formed between any two adjacent side protrusions.

[0013] In combination with the second possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the shell is provided with a plurality of through holes, and the plurality of through holes are arranged at intervals around the non-metallic lining.

[0014] In combination with the second possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein the housing is provided with a tapered hole, and the diameter of the tapered hole increases gradually from an end away from the valve seat to an end close to the valve seat;

[0015] The spring is inserted into the tapered hole.

[0016] In combination with the second possible implementation of the first aspect, the present utility model provides a sixth possible implementation of the first aspect, wherein the housing is provided with a first center hole, and the valve seat is provided with a second center hole;

[0017] The annular gas valve further includes a stud and a nut. The stud is fitted in the first center hole and passes through the second center hole. The nut is fitted in the stud and causes the valve seat to be compressed between the valve cover and the nut.

[0018] In combination with the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein an annular groove is provided on the outer ring of the valve seat, and a sealing ring is installed in the annular groove.

[0019] In combination with the seventh possible implementation of the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein a retaining ring is further installed in the annular groove, and the retaining ring abuts against the sealing ring.

[0020] In a second aspect, the diaphragm compressor provided by the present invention is equipped with the annular air valve described in the first aspect.

[0021] The embodiments of the present invention bring the following beneficial effects: a valve seat is provided with a flow hole, and the valve seat is connected to the valve cover, the valve plate is sleeved with the valve cover, and the valve plate is opposite to the flow hole, a spring is installed between the valve cover and the valve plate, and the spring has a tendency to drive the valve plate to block the flow hole, the valve cover is provided with a guide structure adapted to the valve plate, so as to enable the valve plate to slide along the guide structure relative to the valve cover and limit the valve plate from rotating around the valve cover, the valve plate is more suitable for selecting metal material to improve the pressure resistance, and can avoid the valve plate from rotating, prevent the spring from being subjected to lateral force, reduce the risk of damage or breakage of the spring, and help to extend the service life of the annular air valve.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A cross-sectional view of an annular air valve provided in an embodiment of the present utility model;

[0025] Figure 2 A schematic diagram of an annular air valve provided in an embodiment of the present utility model;

[0026] Figure 3 A schematic diagram of a valve seat of an annular gas valve provided in an embodiment of the present utility model;

[0027] Figure 4 A schematic diagram of a valve cover of an annular gas valve provided in an embodiment of the present utility model;

[0028] Figure 5 A schematic diagram of the valve cover and valve plate of the annular gas valve provided in an embodiment of the present utility model;

[0029] Figure 6 A schematic diagram of the valve plate of the annular air valve provided in an embodiment of the present utility model.

[0030] Icons: 1-valve seat; 11-annular groove; 12-flow channel hole; 13-second center hole; 2-valve cover; 21-housing; 22-non-metallic lining; 23-conical hole; 24-through hole; 25-side protrusion; 26-first center hole; 3-stud; 4-nut; 5-valve disc; 51-groove; 6-retaining ring; 7-sealing ring; 8-spring. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0033] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the annular air valve provided by the embodiment of the present invention includes: a valve seat 1, a valve cover 2, a valve disc 5 and a spring 8; the valve seat 1 is provided with a flow channel hole 12, and the valve seat 1 is connected to the valve cover 2; the valve disc 5 is sleeved on the valve cover 2, and the valve disc 5 is opposite to the flow channel hole 12; the spring 8 is installed between the valve cover 2 and the valve disc 5, and the spring 8 has a tendency to drive the valve disc 5 to block the flow channel hole 12; the valve cover 2 is provided with a guide structure adapted to the valve disc 5, so as to enable the valve disc 5 to slide relative to the valve cover 2 along the guide structure and limit the valve disc 5 from rotating around the valve cover 2.

[0035] Specifically, the guide structure can be configured as a slide rail or a slide groove. On the one hand, it can enable the valve plate 5 to slide back and forth smoothly along the guide structure relative to the valve cover 2. On the other hand, it limits the rotation of the valve plate 5 around the valve cover 2, thereby avoiding the spring 8 from being subjected to lateral force due to the rotation of the valve plate 5, thereby reducing the risk of damage or breakage of the spring 8.

[0036] The annular air valve remains closed by the action of spring 8, which pushes against valve disc 5, thereby blocking flow channel 12. When the pressure of the fluid flowing out of flow channel 12 increases, the pressure difference drives valve disc 5 to squeeze spring 8, separating valve disc 5 from valve seat 1, and fluid can flow through flow channel 12.

[0037] like Figure 4 、 Figure 5 and Figure 6 As shown, in the embodiment of the present invention, the guide structure includes a plurality of guide protrusions spaced around the valve cover 2 , the inner ring of the valve plate 5 is provided with a plurality of grooves 51 , and the plurality of guide protrusions slide in correspondence with the plurality of grooves 51 .

[0038] In an alternative embodiment, six protrusions may be spaced around the valve cover 2, with three radial protrusions being larger and the other three being smaller, and the two types of protrusions being alternately spaced around the valve cover 2. The larger radial protrusions serve as guide protrusions, which slide into corresponding grooves 51 during assembly. The three shorter protrusions are then loosely fitted into the inner ring of the valve disc 5, ensuring accurate radial positioning of the valve disc 5 relative to the valve cover 2.

[0039] like Figure 4 As shown, the valve cover 2 includes: an outer shell 21 and a non-metallic lining 22 , the outer shell 21 is arranged around the outside of the non-metallic lining 22 , and the guide structure is arranged on the non-metallic lining 22 .

[0040] The outer shell 21 and the non-metallic lining 22 may be connected by interference fit, and the interference fit surfaces may be configured as alternating planes and arc surfaces, thereby preventing the outer shell 21 from loosening relative to the non-metallic lining 22 .

[0041] Furthermore, the outer circumferential wall of the housing 21 is provided with a plurality of side protrusions 25, with a notch formed between any two adjacent side protrusions 25. When the valve cover 2 is assembled within the cylinder head passage, the plurality of side protrusions 25 divide the area between the valve cover 2 and the inner wall of the cylinder head passage into a plurality of sector-shaped passages. When the valve is open, fluid can flow through the plurality of sector-shaped passages.

[0042] In addition, the outer shell 21 is provided with a plurality of through holes 24, and the plurality of through holes 24 are arranged at intervals around the non-metallic lining 22. The through holes 24 can extend around the non-metallic lining 22 to form an approximate waist shape. When the valve is open, the fluid can flow through the plurality of through holes 24, thereby increasing the flow area.

[0043] like Figure 1 and Figure 4 As shown, housing 21 is provided with a tapered hole 23, the diameter of which increases gradually from the end away from valve seat 1 to the end closer to valve seat 1. Spring 8 is inserted into tapered hole 23, facilitating assembly and positioning of spring 8. Spring 8 can be a cylindrical coil spring, a non-cylindrical coil spring, or the like. When spring 8 is compressed and rebounds, the inner wall of tapered hole 23 and spring 8 experience less wear, thereby reducing wear on spring 8 and extending its service life.

[0044] Furthermore, the housing 21 may be provided with multiple tapered holes 23, spaced apart around the non-metallic liner 22. A spring 8 is installed in each tapered hole 23, and the multiple springs 8 collectively drive the valve disc 5. To ensure stable reciprocating motion of the valve disc 5, there should be no fewer than three tapered holes 23. Furthermore, the number of tapered holes 23 arranged in a single circle around the non-metallic liner 22 should not exceed six, thereby avoiding unnecessary clearance on the gas side of a compressor equipped with an annular gas valve.

[0045] It should be noted that the through hole 24 is located inside the pitch circle where the multiple tapered holes 23 are located, and a breathing hole can be set at the bottom of the tapered hole 23 to maintain the air pressure balance inside and outside the tapered hole 23 when the spring 8 is compressed and rebounds.

[0046] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the housing 21 is provided with a first center hole 26, and the valve seat 1 is provided with a second center hole 13; the annular gas valve further includes: a stud 3 and a nut 4, the stud 3 is fitted into the first center hole 26, and the stud 3 passes through the second center hole 13, the nut 4 is fitted into the stud 3, and the valve seat 1 is pressed between the valve cover 2 and the nut 4.

[0047] In addition, in order to ensure the stability of the annular air valve assembly structure, the stud 3 and the nut 4 may adopt an anti-loosening design, for example, using double nuts or self-locking nuts.

[0048] like Figure 1 and Figure 3 As shown, the outer ring of the valve seat 1 is provided with an annular groove 11, and a sealing ring 7 is installed in the annular groove 11. The sealing ring 7 can be pressed tightly in the cylinder head channel to prevent the compressed gas in the valve from leaking or being contaminated.

[0049] In addition, a retaining ring 6 is installed in the annular groove 11, and the retaining ring 6 abuts against the sealing ring 7. The retaining ring 6 limits the axial position of the sealing ring 7 to prevent the sealing ring 7 from loosening.

[0050] The diaphragm compressor provided in the embodiment of the present invention is equipped with the annular air valve described in the above embodiment.

[0051] The annular air valve and diaphragm compressor described in this embodiment have the following beneficial effects:

[0052] (1) It not only guides the valve disc 5 and ensures the stable reciprocating motion of the valve disc 5, but also limits the rotation of the valve disc 5, preventing the valve disc 5 from exerting lateral force on the spring 8, reducing the risk of damage to the spring 8, and helping to extend the service life of the equipment;

[0053] (2) The valve plate 5 is suitable for being made of metal and can withstand a large pressure difference, and is particularly suitable for high-pressure liquid-driven diaphragm compressors.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An annular air valve, characterized in that: include: Valve seat (1), valve cover (2), valve plate (5) and spring (8); The valve seat (1) is provided with a flow channel hole (12), and the valve seat (1) is connected to the valve cover (2); The valve plate (5) is sleeved on the valve cover (2), and the valve plate (5) is opposite to the flow channel hole (12); The spring (8) is installed between the valve cover (2) and the valve plate (5), and the spring (8) has a tendency to drive the valve plate (5) to block the flow channel hole (12); The valve cover (2) is provided with a guide structure adapted to the valve disc (5), so as to enable the valve disc (5) to slide relative to the valve cover (2) along the guide structure and to restrict the valve disc (5) from rotating around the valve cover (2).

2. The annular gas valve according to claim 1, characterized in that: The guide structure comprises a plurality of guide protrusions arranged at intervals around the valve cover (2); the inner ring of the valve plate (5) is provided with a plurality of grooves (51); and the plurality of guide protrusions are slidably matched with the plurality of grooves (51) in a one-to-one correspondence.

3. The annular gas valve according to claim 1, characterized in that: The valve cover (2) comprises: an outer shell (21) and a non-metallic lining (22); the outer shell (21) is arranged outside the non-metallic lining (22); and the guide structure is arranged on the non-metallic lining (22).

4. The annular gas valve according to claim 3, characterized in that: The outer circumferential side wall of the housing (21) is provided with a plurality of side protrusions (25), and a notch is formed between any two adjacent side protrusions (25).

5. The annular gas valve according to claim 3, characterized in that: The shell (21) is provided with a plurality of through holes (24), and the plurality of through holes (24) are arranged at intervals around the non-metallic lining (22).

6. The annular gas valve according to claim 3, characterized in that: The housing (21) is provided with a tapered hole (23), the diameter of the tapered hole (23) increasing from an end away from the valve seat (1) to an end close to the valve seat (1); The spring (8) is inserted into the tapered hole (23).

7. The annular gas valve according to claim 3, characterized in that: The housing (21) is provided with a first central hole (26), and the valve seat (1) is provided with a second central hole (13); The annular air valve further comprises: a stud (3) and a nut (4), wherein the stud (3) is fitted into the first center hole (26) and passes through the second center hole (13), and the nut (4) is fitted into the stud (3) and causes the valve seat (1) to be compressed between the valve cover (2) and the nut (4).

8. The annular gas valve according to claim 1, characterized in that: The outer ring of the valve seat (1) is provided with an annular groove (11), and a sealing ring (7) is installed in the annular groove (11).

9. The annular gas valve according to claim 8, characterized in that: A retaining ring (6) is also installed in the annular groove (11), and the retaining ring (6) abuts against the sealing ring (7).

10. A diaphragm compressor, characterized in that: The diaphragm compressor is equipped with the annular gas valve according to any one of claims 1 to 9.

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