Check valve clack anti-rotation device

Abstract

The utility model belongs to the technical field of check valves, and particularly relates to a check valve clack anti-rotation device which comprises a valve body, a support, a guide sleeve, a valve clack, a guide rod, a guide groove and a guide key. The support is arranged in the valve body, a flow channel is formed between the outer wall of the support and the inner wall of the valve body, and a guide sleeve is arranged on the support. The valve clack is arranged in the valve body and matched with the valve seat to form sealing, a guide rod is arranged on the valve clack, one end of the guide rod is slidably connected with the guide sleeve, and the valve clack can get close to and get away from the support; the guide groove is formed in the peripheral wall of the guide rod in the axial direction of the guide rod. The guide key is arranged on the inner wall of the guide sleeve, the side wall of the guide key is attached to the side wall of the guide groove, and the guide key can slide in the guide groove in the axial direction of the guide rod; compared with the prior art, the anti-rotation device for the valve clack can limit the valve clack to rotate in the process of opening and closing the check valve, the sealing performance of the check valve is improved, and the service life of the check valve is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves, and in particular relates to a check valve disc anti-rotation device. Background Art

[0002] A check valve, also known as a non-return valve or one-way valve, is an automatically operated valve that allows fluid (liquid or gas) to flow in one direction and prevents flow in the opposite direction. This valve is designed to prevent the fluid in the system from flowing back, thereby protecting equipment from damage or avoiding unnecessary pressure fluctuations in the system.

[0003] The existing check valve generally includes a valve body, a valve seat, a valve disc, and a guide rod. The valve disc can move in the valve body under the guidance of the guide rod. When the check valve is in the closed state, the valve disc and the valve seat are sealed. When the medium in the valve body flows forward, the valve disc will be pushed away from the valve seat to open the check valve. When the medium in the valve body flows in the reverse direction, the valve disc will be pushed toward the valve seat to close the check valve. During operation, the existing valve disc is prone to rotation under the pressure of the medium, which will cause friction between the valve disc and the guide rod, aggravate the wear between the valve disc and the guide rod, cause poor opening and closing, and poor sealing, which reduces the service life of the check valve. Therefore, the existing check valve needs to be improved. Utility Model Content

[0004] The purpose of the present utility model is to provide a check valve disc anti-rotation device to address the above-mentioned technical problems. This valve disc anti-rotation device can limit the valve disc from rotating during the opening and closing process of the check valve, thereby improving the sealing performance of the check valve and extending the service life of the check valve.

[0005] In view of this, the present invention provides a check valve disc anti-rotation device, comprising:

[0006] a valve body, wherein a valve seat is provided in the valve body;

[0007] The bracket is arranged in the valve body, a flow channel is formed between the outer wall of the bracket and the inner wall of the valve body, and a guide sleeve is provided on the bracket;

[0008] The valve disc is arranged in the valve body and cooperates with the valve seat to form a seal. The valve disc is provided with a guide rod, one end of which is slidably connected to the guide sleeve, so that the valve disc can move closer to and away from the bracket;

[0009] The valve disc is fixedly connected to the guide rod;

[0010] A guide groove is provided on the outer peripheral wall of the guide rod along the axial direction of the guide rod;

[0011] The guide key is arranged on the inner wall of the guide sleeve, the side wall of the guide key is in contact with the side wall of the guide groove, and the guide key can slide in the guide groove along the axial direction of the guide rod.

[0012] In this technical solution, when the medium in the valve body needs to flow in the forward direction, the medium will push the valve disc toward the bracket to open the valve. During this process, the guide key will slide in the guide groove along the axial direction of the guide rod, guiding and limiting the movement of the valve disc, and limiting the rotation of the guide rod relative to the guide sleeve; the fixed connection between the valve disc and the guide rod can limit the rotation of the valve disc relative to the guide rod.

[0013] In the above technical solution, further, a reset spring is included. The reset spring is sleeved outside the guide rod, and both ends of the reset spring are respectively connected to the valve disc and the guide sleeve.

[0014] In the above technical solution, further, a plurality of guide grooves are provided on the guide rod at intervals along the circumferential direction, and a plurality of guide keys cooperating with the guide keys are provided on the inner wall of the guide sleeve.

[0015] In the above technical solution, further, an adjustment mechanism is provided on the guide sleeve, and the adjustment mechanism can adjust the position of the guide key along the radial direction of the guide rod.

[0016] In the above technical solution, further, the guide sleeve includes a fixed sleeve and an installation sleeve, the fixed sleeve is connected to the bracket, and the installation sleeve is connected to the fixed sleeve. A through groove cooperating with the guide rod is opened in the middle of the installation sleeve, and an open groove for the guide key to move is provided on the side wall of the through groove; the adjustment mechanism can adjust the position of the guide key in the open groove.

[0017] In the above technical solution, further, the regulating mechanism includes:

[0018] A threaded hole is provided on the guide key along the radial direction of the guide rod;

[0019] Mounting hole, the mounting hole is opened on the fixing sleeve;

[0020] The screw rod is rotatably connected to the mounting hole, and the threaded end of the screw rod is threadedly connected to the threaded hole.

[0021] In the above technical solution, further, a deflector is provided on the outside of the bracket.

[0022] In the above technical solution, further, a locking structure is provided between the deflector cover and the valve body.

[0023] The beneficial effects of the utility model are:

[0024] 1. By providing a guide groove along the axial direction on the outer wall of the guide rod and providing a guide key on the inner wall of the guide sleeve, the guide key cooperates with the guide groove to restrict the rotation of the valve disc when the valve disc moves relative to the bracket to open and close the check valve, thereby avoiding friction between the valve disc and the guide rod, and friction between the guide rod and the guide sleeve, thereby improving the sealing performance of the check valve and extending the service life of the check valve.

[0025] 2. By arranging multiple sets of guide grooves at intervals along the circumference on the guide rod and arranging multiple sets of guide keys on the inner wall of the guide sleeve to cooperate with these guide grooves, it is easier to align the guide rod and the guide sleeve coaxially during installation, reducing the difficulty of installing the guide rod and the guide sleeve and further improving the rotation limit of the valve disc.

[0026] 3. By setting an adjustment mechanism on the guide sleeve to adjust the position of the guide key in the radial direction of the guide rod, the position of the guide key can be fine-tuned when the guide key and the guide groove are matched to avoid a gap between the guide key and the guide groove, thereby better exerting the restrictive effect of the guide key and the guide groove on the valve disc and the guide rod.

[0027] 4. By setting a flow guide cover outside the bracket, the medium can be guided and concentrated, and a locking structure is set between the flow guide cover and the valve body to prevent the flow guide cover from rotating during the flow cut-off process, thereby keeping the bracket stable and the valve disc stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0029] Figure 1 It is a schematic diagram of the internal cross-sectional structure of the utility model.

[0030] Figure 2 This is a schematic diagram of the guide groove structure in the utility model.

[0031] Figure 3 The figure is a schematic diagram of the radial cross-section structure of a guide rod with multiple groups of guide grooves in the present invention.

[0032] Figure 4 This is a schematic diagram of the three-dimensional structure of the components on the guide rod after the adjustment mechanism is set in the utility model.

[0033] Figure 5 This is a schematic diagram of the cross-sectional structure of the components on the guide rod after the adjustment mechanism is set in the utility model.

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the adjustment mechanism in the utility model in the disassembled state.

[0035] The marks in the figure are:

[0036] 1. Valve body; 2. Valve seat; 3. Bracket; 4. Guide sleeve; 41. Fixing sleeve; 42. Mounting sleeve; 421. Through slot; 422. Opening slot; 5. Valve disc; 6. Guide rod; 7. Guide slot; 8. Guide key; 9. Adjustment mechanism; 901. Threaded hole; 902. Mounting hole; 903. Screw; 10. Flow deflector; 11. Locking mechanism; 12. Return spring DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present utility model, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0039] Example 1

[0040] like Figure 1-Figure 2 As shown, this embodiment provides a check valve disc anti-rotation device, including: a valve body 1, a bracket 3, a guide sleeve 4, a valve disc 5, a guide rod 6, a guide groove 7, a guide key 8, a reset spring 12,

[0041] See also Figure 1 The valve body 1 has a valve cavity communicating with both ends of the valve body 1. The valve body 1 is provided with a valve seat 2. The middle of the valve seat 2 is provided with a conducting hole, and the medium can flow in the valve cavity through the conducting hole.

[0042] The bracket 3 is arranged on the side of the valve body 1 away from the valve seat 2. A flow channel is formed between the outer wall of the bracket 3 and the inner wall of the valve body 1. A guide sleeve 4 is provided on the bracket 3. A flow guide cover 10 is provided on the outer wall of the bracket 3. The flow guide cover 10 can guide the flow direction of the medium and concentrate the medium. Specifically, a locking structure 11 is provided between the flow guide cover 10 and the valve body 1. Please refer to Figure 1 The deflector 10 can be fixed to the inner wall of the valve body 1 through the locking structure 11, and the locking structure 11 can be made of fasteners;

[0043] The valve disc 5 is arranged between the bracket 3 and the valve seat 2. The end of the valve disc 5 away from the bracket 3 can be sealed and fitted with the end of the valve seat 2 to block the guide hole, thereby closing the valve. The valve disc 5 can approach and move away from the bracket 3. When the valve disc 5 blocks the guide hole, it is located at a position away from the bracket 3. When the valve disc 5 approaches the bracket 3, it separates from the valve seat 2 to open the guide hole, thereby opening the valve. A guide rod 6 is provided on the valve disc 5. The valve disc 5 is fixedly connected to the guide rod 6. Specifically, the valve disc 5 and the guide rod 6 are welded to form an integrated structure. One end of the guide rod 6 is slidably connected to the guide sleeve 4. The guide rod 6 and the guide sleeve 4 cooperate to guide the movement of the valve disc 5.

[0044] The return spring 12 is sleeved on the outside of the guide rod 6. The two ends of the return spring 12 are connected to the valve disc 5 and the guide sleeve 4 respectively. The return spring 12 applies a pre-tightening force to the valve disc 5 when the valve disc 5 closes the valve, so that the valve disc 5 stably blocks the guide hole. When the valve disc 5 approaches the bracket 3, the return spring 12 is squeezed and deformed.

[0045] See also Figure 2 , the guide groove 7 is opened on the outer peripheral wall of the guide rod 6 along the axial direction of the guide rod 6;

[0046] See also Figure 1 , the guide key 8 is provided on the inner wall of the guide sleeve 4, the side wall of the guide key 8 is fitted with the side wall of the guide groove 7, and the guide key 8 can slide in the guide groove 7 along the axial direction of the guide rod 6;

[0047] In this embodiment, when the medium in the valve body 1 needs to flow in the forward direction, the medium will push the valve flap 5 toward the bracket 3 to open the valve. During this process, the guide key 8 will slide in the guide groove 7 along the axial direction of the guide rod 6, guiding and limiting the movement of the valve flap 5, and limiting the rotation of the guide rod 6 relative to the guide sleeve 4; the fixed connection between the valve flap 5 and the guide rod 6 can limit the rotation of the valve flap 5 relative to the guide rod 6; thereby avoiding friction generated by rotation between the valve flap 5 and the guide rod 6, and avoiding friction generated by rotation between the guide rod 6 and the guide sleeve 4, thereby improving the sealing performance of the check valve and extending the service life of the check valve.

[0048] Example 2

[0049] This embodiment provides a check valve disc anti-rotation device, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0050] See also Figure 3 , a plurality of guide grooves 7 are provided on the guide rod 6 at intervals along the circumferential direction, and a plurality of guide keys 8 are provided on the inner wall of the guide sleeve 4 to cooperate with these guide keys 8; Figure 3 The example given in the figure is when three groups of guide grooves 7 and guide keys 8 are provided. In actual processing, more or less groups can also be processed.

[0051] The arrangement of this embodiment can make it easier to coaxially align the guide rod 6 and the guide sleeve 4 during installation, thereby reducing the difficulty of installing the guide rod 6 and the guide sleeve 4 and further improving the rotation restriction of the valve disc 5.

[0052] Example 3

[0053] This embodiment provides a check valve disc anti-rotation device. In addition to the technical solutions of the above embodiments, the cooperation between the guide key 8 and the guide groove 7 is optimized.

[0054] See also Figure 4 , an adjusting mechanism 9 is provided on the guide sleeve 4, and the adjusting mechanism 9 can adjust the position of the guide key 8 along the radial direction of the guide rod 6;

[0055] For details, please refer to Figure 6 The guide sleeve 4 includes a fixed sleeve 41 and a mounting sleeve 42. The fixed sleeve 41 is detachably connected to the bracket 3, and the mounting sleeve 42 is detachably connected to the fixed sleeve 41. A through slot 421 is provided in the middle of the mounting sleeve 42 to cooperate with the guide rod 6. The outer wall of the guide rod 6 can be slidably connected to the through slot 421. An open slot 422 for the guide key 8 to move is provided on the side wall of the through slot 421; the adjustment mechanism 9 can adjust the position of the guide key 8 in the open slot 422. Here, the position of the guide key 8 is adjusted along the radial direction of the mounting sleeve 42, so that the guide key 8 is close to and away from the axis of the mounting sleeve 42;

[0056] More specifically, in this embodiment, the adjustment mechanism 9 includes: a threaded hole 901, a mounting hole 902, a screw 903,

[0057] A threaded hole 901 is formed on the guide key 8 along the radial direction of the guide rod 6; a mounting hole 902 is formed on the fixing sleeve 41, and the mounting hole 902 and the threaded hole 901 are coaxially distributed; a screw rod 903 is rotatably connected to the mounting hole 902, and a threaded end of the screw rod 903 is threadedly connected to the threaded hole 901;

[0058] See also Figure 5 When the screw 903 is rotated, the position of the screw 903 on the fixed sleeve 41 will not change, and the guide key 8 will adjust its position along the axial direction of the screw 903, that is, close to or away from the bottom surface of the guide groove 7, thereby facilitating the adjustment of the fit between the guide key 8 and the guide groove 7.

[0059] The embodiments of the present invention are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A check valve disc anti-rotation device, comprising: A valve body (1), wherein a valve seat (2) is provided in the valve body (1); A bracket (3), the bracket (3) is arranged in the valve body (1), a flow channel is formed between the outer wall of the bracket (3) and the inner wall of the valve body (1), and a guide sleeve (4) is provided on the bracket (3); A valve flap (5) is provided in the valve body (1) and cooperates with the valve seat (2) to form a seal. A guide rod (6) is provided on the valve flap (5). One end of the guide rod (6) is slidably connected to the guide sleeve (4). The valve flap (5) can move closer to and away from the bracket (3). It is characterized by further comprising: The valve flap (5) is fixedly connected to the guide rod (6); A guide groove (7), the guide groove (7) being opened on the outer peripheral wall of the guide rod (6) along the axial direction of the guide rod (6); A guide key (8), wherein the guide key (8) is arranged on the inner wall of the guide sleeve (4), the side wall of the guide key (8) is in contact with the side wall of the guide groove (7), and the guide key (8) can slide in the guide groove (7) along the axial direction of the guide rod (6).

2. The anti-rotation device for a check valve disc according to claim 1, characterized in that: It also includes a reset spring (12), which is sleeved on the outside of the guide rod (6), and the two ends of the reset spring (12) are respectively connected to the valve disc (5) and the guide sleeve (4).

3. The anti-rotation device for a check valve disc according to claim 1, characterized in that: The guide rod (6) is provided with a plurality of guide grooves (7) spaced apart along the circumferential direction, and the inner wall of the guide sleeve (4) is provided with a plurality of guide keys (8) that cooperate with the guide keys (8).

4. The anti-rotation device for a check valve disc according to claim 1, characterized in that: The guide sleeve (4) is provided with an adjusting mechanism (9), and the adjusting mechanism (9) can adjust the position of the guide key (8) along the radial direction of the guide rod (6).

5. The anti-rotation device for a check valve disc according to claim 4, characterized in that: The guide sleeve (4) includes a fixed sleeve (41) and a mounting sleeve (42), wherein the fixed sleeve (41) is connected to the bracket (3), and the mounting sleeve (42) is connected to the fixed sleeve (41). A through slot (421) cooperating with the guide rod (6) is provided in the middle of the mounting sleeve (42), and an opening slot (422) for the guide key (8) to move is provided on the side wall of the through slot (421); and the adjustment mechanism (9) can adjust the position of the guide key (8) in the opening slot (422).

6. The anti-rotation device for a check valve disc according to claim 5, characterized in that: The regulating mechanism (9) comprises: a threaded hole (901), the threaded hole (901) being opened on the guide key (8) along the radial direction of the guide rod (6); a mounting hole (902), the mounting hole (902) being provided on the fixing sleeve (41); A screw rod (903) is rotatably connected to the mounting hole (902), and a threaded end of the screw rod (903) is threadedly connected to the threaded hole (901).

7. A check valve disc anti-rotation device according to any one of claims 1 to 6, characterized in that: A flow guide cover (10) is provided on the outside of the bracket (3).

8. The anti-rotation device for a check valve disc according to claim 7, characterized in that: A locking structure (11) is provided between the deflector cover (10) and the valve body (1).

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