Check valve

Abstract

The utility model relates to the technical field of valves, and discloses a check valve which comprises a valve body, the left end and the right end of the valve body are both fixedly connected with butt joint plates, the inner wall of the valve body is connected with an attaching ring through an extrusion set so that the attaching ring can move, and the top end of the valve body is fixedly connected with an adjusting pipe. The bottom end of the right end of the attaching ring is connected with a fixing gear through a fixing set so as to be used for positioning the fixing gear, the right end of the inner wall of the adjusting pipe is fixedly connected with a fixing block, the left end of the fixing block is connected with a connecting pipe through a sealing set so as to be used for resetting the connecting pipe, and the top end of the sealing plate is in threaded connection with an extrusion rod. The bottom end of the extrusion rod is connected with an expansion air bag through an expansion set. According to the device, the sealing plate is closed in the fixing ring, and then the sealing plate is closed at the sealing ring, so that the one-way circulation effect of the device is improved when a medium circulates, the fluid conveying efficiency is improved, and the energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a check valve. Background Art

[0002] A check valve is an automatic valve whose main function is to prevent the backflow of the medium. It uses the circular valve disc of the opening and closing part to rely on its own gravity and the pressure of the medium to achieve automatic opening and closing of the valve. The check valve usually includes components such as a valve body, a valve disc, a rocker and a pin. When working, the medium will exert pressure on the valve disc when flowing through the valve body, pushing the valve disc and the connected rocker. One end of the rocker is rotatably connected to the pin. The pressure of the medium causes the rocker to drive the pin to rotate, thereby opening the valve disc and allowing the medium to flow. When the medium pressure drops, the valve disc and rocker overcome the pressure of the medium under the action of their own gravity and reset, automatically closing the valve to prevent the medium from flowing back.

[0003] After searching, a check valve with announcement number CN221300215U includes a valve body, an opening and closing assembly, and a connecting assembly. The valve body has a circulation chamber, a medium inlet, and a medium outlet. The opening and closing assembly includes a rotating member and an opening and closing structure. The rotating member is rotatably arranged on the inner wall of the circulation chamber near the medium inlet. The opening and closing structure is connected to the rotating member. The opening and closing structure has an open state and a closed state. In the open state, the opening and closing structure moves away from the medium inlet under the action of the medium pressure to avoid the medium inlet. In the closed state, the opening and closing structure moves close to the medium inlet under the action of its own gravity to block the medium inlet. The connecting assembly includes a connecting member and a first guide member. The first guide member is connected to the valve body, and a first through portion connected to the circulation chamber is provided on the first guide member. One end of the connecting member is suitable for passing through the first through portion to connect to the rotating member. The check valve with the above structure can avoid the situation where the medium pressure cannot drive the opening and closing structure to rotate, which eventually causes the valve to malfunction.

[0004] Based on the above patent, an opening and closing component is arranged in the valve body and a connecting component connected to the opening and closing component, wherein the valve body has a flow cavity and a medium inlet and a medium outlet connected to the flow cavity, so that the medium can flow into the flow cavity through the medium inlet and flow out of the flow cavity through the medium outlet. The opening and closing component includes a rotating member and an opening and closing structure, wherein the rotating member is rotatably arranged on the inner wall of the flow cavity near the medium inlet, and the opening and closing structure is connected to the rotating member, specifically a fixed connection, so that when the medium flows into the flow cavity, the opening and closing structure drives the rotating member to rotate in a direction away from the medium inlet under the action of the medium pressure, thereby avoiding the medium inlet, so that the medium can flow into the flow cavity through the medium inlet. At this time, the opening and closing structure is in an open state, and when most of the medium flows into the flow cavity through the medium inlet and flows out of the flow cavity through the medium outlet, the medium pressure provided by the remaining part of the medium is already less than the gravity of the opening and closing structure itself. At this time, the opening and closing structure will drive the rotating member to rotate in a direction close to the medium inlet under the action of its own gravity, thereby blocking the medium inlet and preventing the medium from flowing into the flow cavity through the medium inlet. In this case, the opening and closing structure is in a closed state, and the connecting component includes a connecting member and a first guide member, wherein the first guide member is connected to the valve body, specifically by welding. At the same time, a first through portion communicating with the flow cavity is provided on the first guide member, and one end of the connecting member extends into the flow cavity through the first through portion and is connected to the rotating member, so that under the action of an external force, the rotating member is driven to rotate by rotating the connecting member, and then the rotating member drives the opening and closing structure to rotate, so that the opening and closing structure can switch back and forth between the open state and the closed state under the action of an external force. In summary, when the valve discharges the medium and impurities in the medium enter the part where the opening and closing structure is connected to the rotating member, and cause the opening and closing structure to be stuck, the opening and closing structure can be driven to rotate by an external force to avoid the situation where the medium pressure cannot drive the opening and closing structure to rotate, and ultimately cause the valve to fail to work normally. However, when the sealing component is used for sealing in this patent, the sealing effect is poor when the medium is unidirectionally circulated. The poor sealing effect will cause unnecessary pressure fluctuations or losses inside the system, which will reduce the efficiency of the system and may affect the normal operation of other equipment. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a check valve, so that the one-way flow effect of the device is improved when the medium flows, the efficiency of fluid transportation is improved, and the energy loss is reduced.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A check valve, comprising:

[0008] The valve body has docking plates fixedly connected to both ends of the left and right ends of the valve body. The inner wall of the valve body is connected to a fitting ring through an extrusion group for movement of the fitting ring. The top of the valve body is fixedly connected to an adjusting tube. The bottom right end of the fitting ring is connected to a fixing gear through a fixing group for positioning the fixed gear. The right end of the inner wall of the adjusting tube is fixedly connected to a fixing block. The left end of the fixing block is connected to a connecting tube through a sealing group for resetting the connecting tube.

[0009] A sealing plate, wherein the top end of the sealing plate is threadedly connected to an extrusion rod, and the bottom end of the extrusion rod is connected to an expansion airbag via an expansion group, so that the expansion airbag is expanded by air pressure;

[0010] A fixing ring, wherein the four sides of the outer wall of the right end of the fixing ring are fixedly connected with connecting blocks, and the opposite end of the connecting block is connected with a sealing plate through a sealing group for sealing the fixing ring and the sealing plate.

[0011] Furthermore, the extrusion group includes a spring rod fixedly connected to the front and rear sides of the bottom end of the fitting ring, the other end of the spring rod is fixedly connected to the front and rear sides of the inner wall of the adjustment tube, and the top end of the adjustment tube is detachably connected to the adjustment rod.

[0012] Furthermore, the fixing group includes a fitting block fixedly connected to the right end of the fitting ring, the bottom end of the fitting block fits with the outer wall of the fixed gear, and the inner wall of the fixed gear is fixedly connected to the outer wall of the right end of the U-shaped tube.

[0013] Furthermore, the sealed group includes a U-shaped tube rotatably connected to the inner wall of the fixed block, the front and rear ends of the U-shaped tube are fixedly connected to extrusion springs, the other end of the extrusion spring is fixedly connected to a connecting tube, and the inner wall of the connecting tube is slidably connected to the outer walls on both sides of the front and rear of the left end of the U-shaped tube.

[0014] Furthermore, the right end of the connecting pipe is rotatably connected to a fixing rod, and the left end of the fixing rod is rotatably connected to the outer wall of the right end of the sealing plate.

[0015] Furthermore, the expansion group includes a rubber membrane fixedly connected to the bottom end of the inner wall of the sealing plate, and the outer wall of the bottom end of the sealing plate is tightly attached to the outer wall of the rubber membrane.

[0016] Furthermore, a sealing ring is rotatably connected to the left end of the sealing plate, and the outer wall of the sealing ring is fixedly connected to the inner wall of the left end of the valve body.

[0017] Furthermore, the sealing group includes a reset spring fixedly connected at one opposite end of the connecting block, the other end of the reset spring is fixedly connected to the top outer wall of the sealing plate, and the outer wall of the opposite end of the sealing plate is rotatably connected to the inner wall of the fixing ring.

[0018] The utility model has the following beneficial effects:

[0019] In the utility model, the sealing plate is closed in the fixed ring, and then the sealing plate is closed at the sealing ring, so that the one-way flow effect of the device is improved when the medium circulates, the efficiency of fluid transportation is improved, the energy loss is reduced, and the wear of the equipment caused by the backflow is reduced, which helps to extend the service life of the system and the equipment. The airbag is expanded when the extrusion rod squeezes the rubber membrane, so that the sealing effect is improved when the sealing plate is closed at the sealing ring, the risk of medium leakage is reduced, and the closedness of the system is ensured. The good sealing performance reduces the energy loss caused by leakage or backflow, thereby improving the overall efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of a check valve proposed by the present utility model;

[0021] Figure 2 This is a half-section diagram of the valve body of a check valve proposed in the utility model;

[0022] Figure 3 A half-section diagram of a regulating pipe of a check valve proposed in the present invention;

[0023] Figure 4 A half-section view of a sealing plate of a check valve proposed in the present invention;

[0024] Figure 5 A half-section diagram of a rubber membrane of a check valve proposed in the present invention;

[0025] Figure 6 This is a half-section view of a fixing ring of a check valve proposed by the present invention.

[0026] Legend:

[0027] 1. Valve body; 2. Docking plate; 3. Fixing ring; 4. Sealing plate; 5. Adjusting tube; 6. Adjusting rod; 7. Sealing ring; 8. Fitting ring; 9. Spring rod; 10. Fixing block; 11. Connecting block; 12. Return spring; 13. Sealing plate; 14. Fitting block; 15. U-shaped tube; 16. Connecting tube; 17. Fixing rod; 18. Extrusion rod; 19. Extrusion spring; 20. Fixing gear; 21. Rubber membrane; 22. Inflatable airbag. DETAILED DESCRIPTION

[0028] 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.

[0029] Reference Figure 1-Figure 3 , the utility model provides an embodiment: a check valve, including a valve body 1, the left and right ends of the valve body 1 are fixedly connected to the docking plate 2, the front and rear sides of the bottom end of the fitting ring 8 are fixedly connected to the spring rod 9, the other end of the spring rod 9 is respectively fixedly connected to the front and rear sides of the inner wall of the adjusting tube 5, the top of the adjusting tube 5 is detachably connected to the adjusting rod 6, the top of the valve body 1 is fixedly connected to the adjusting tube 5, the right end of the fitting ring 8 is fixedly connected to the fitting block 14, the bottom end of the fitting block 14 fits with the outer wall of the fixed gear 20, and the inner wall of the fixed gear 20 is fixedly connected to the outer wall of the right end of the U-shaped tube 15 The right end of the inner wall of the regulating tube 5 is fixedly connected to a fixed block 10, and the inner wall of the fixed block 10 is rotatably connected to a U-shaped tube 15. The front and rear ends of the U-shaped tube 15 are fixedly connected to an extrusion spring 19, and the other end of the extrusion spring 19 is fixedly connected to a connecting tube 16. The inner wall of the connecting tube 16 is slidably connected to the outer walls of the front and rear ends of the left end of the U-shaped tube 15. The right end of the connecting tube 16 is rotatably connected to a fixing rod 17. The left end of the fixing rod 17 is rotatably connected to the outer wall of the right end of the sealing plate 13. The left end of the sealing plate 13 is rotatably connected to a sealing ring 7. The outer wall of the sealing ring 7 is fixedly connected to the inner wall of the left end of the valve body 1.

[0030] Specifically: the valve body 1 is docked through the docking plate 2, and the valve body 1 is installed at the working location. When the medium in the pipeline begins to flow, the pressure of the medium will gradually increase. If the pressure of the medium exceeds the elastic strength of the return spring 12 and the extrusion spring 19, the pressure of the medium will force the sealing plate 4, the sealing ring 7 and the sealing plate 13 connecting the fixing ring 3 to deform or open, thereby allowing the medium to flow out from between these sealing components. In this case, the valve body 1 will complete the flow process of the medium, so that the valve body can effectively control the flow of the medium and avoid system overload or leakage.

[0031] Reference Figure 4 and Figure 5 , the sealing plate 13, the top of the sealing plate 13 is threadedly connected to the extrusion rod 18, the bottom end of the inner wall of the sealing plate 13 is fixedly connected to the rubber membrane 21, and the outer wall of the bottom end of the sealing plate 13 is tightly attached to the outer wall of the rubber membrane 21.

[0032] Specifically: when the extrusion rod 18 rotates, an extrusion force is applied to the rubber membrane 21, so that the air inside the rubber membrane 21 is discharged and flows to the expansion airbag 22. This process causes the expansion airbag 22 to produce an expansion effect, thereby pushing the sealing plate 13 connected thereto closer to the sealing ring 7 to achieve a tighter closure. In specific operations, the rotation of the extrusion rod 18 can be performed manually or automatically, and the control of its angle and force will directly affect the degree of extrusion of the rubber membrane 21. As the internal air is discharged, the volume of the expansion airbag 22 increases, pushing the sealing plate 13 to contact the sealing ring 7 more effectively, thereby enhancing the sealing performance of the entire sealing system, extending the service life of the equipment, and reducing maintenance costs.

[0033] Reference Figure 6 , fixing ring 3, the four sides of the outer wall of the right end of the fixing ring 3 are fixedly connected with connecting blocks 11, the opposite end of the connecting block 11 is fixedly connected to the return spring 12, the other end of the return spring 12 is fixedly connected to the top outer wall of the closed plate 4, the outer wall of the opposite end of the closed plate 4 is rotatably connected to the inner wall of the fixing ring 3, the right end of the connecting pipe 16 is rotatably connected to the fixing rod 17, and the left end of the fixing rod 17 is rotatably connected to the outer wall of the right end of the sealing plate 13.

[0034] Specifically, when the medium stops flowing, the elastic force of the connecting block 11 causes the sealing plate 4 to reclose against the fixing ring 3, thereby initially achieving a one-way flow effect within the valve body 1. This design ensures that when the medium flow stops, the valve body 1 can maintain a certain sealing state to prevent the medium from flowing back. In addition, when the extrusion spring 19 generates elastic force, the sealing plate 13 will reclose against the sealing ring 7 through the action of the connecting tube 16 and the fixing rod 17. This action further enhances the one-way flow effect of the valve body, ensuring that the medium can only flow in one direction, preventing backflow or leakage. During the adjustment process, when the adjusting rod 6 is rotated, it drives the fitting ring 8, causing the fitting block 14 to tightly fit with the fixing gear 20. This action causes the fixing gear 20 to stop rotating, and thus the connected U-shaped tube 15 also stops rotating. Through this mechanism, the entire system can achieve mechanical control, so that the sealing plate 13 is stably closed, thereby achieving a precise sealing effect, preventing accidental leakage, and improving the reliability and stability of the system. Through precise mechanical control, the stable sealing performance can be guaranteed under different operating conditions, thereby reducing the frequency and cost of equipment maintenance.

[0035] Working principle: First, dock the valve body 1 with the docking plate 2, and install the valve body 1 at the working location. When the medium in the pipeline circulates, the pressure generated by the medium exceeds the elastic strength of the return spring 12 and the extrusion spring 19, so that the pressure of the medium flows out from the sealing plate 13 connected to the sealing plate 4 and the sealing ring 7 at the fixed ring 3, so that the valve body 1 can circulate the medium. When the medium stops flowing, the connecting block 11 uses the elastic force to close the sealing plate 4 at the fixed ring 3 again, so that the valve body 1 initially achieves a one-way flow effect. When the extrusion spring 19 generates elastic force, the connecting pipe 16 allows the fixing rod 17 to seal. The sealing plate 13 is closed again at the sealing ring 7 for one-way circulation again, and when the adjusting rod 6 is rotated, the fitting ring 8 drives the fitting block 14 to fit into the fixed gear 20, so that the fixed gear 20 stops rotating, and the U-shaped tube 15 stops rotating, thereby achieving the mechanical control of the closing effect of the sealing plate 13, and when the extrusion rod 18 is rotated, the extrusion rod 18 can squeeze the rubber membrane 21, so that the rubber membrane 21 discharges the air inside it into the expansion airbag 22, so that the expansion airbag 22 produces an expansion effect, so that the sealing plate 13 connected to the expansion airbag 22 is closed on the sealing ring 7 to improve the sealing effect.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A check valve, characterized in that: include: A valve body (1), wherein both left and right ends of the valve body (1) are fixedly connected to docking plates (2), an inner wall of the valve body (1) is connected to a fitting ring (8) through an extrusion group, so that the fitting ring (8) can be moved, an adjusting tube (5) is fixedly connected to the top of the valve body (1), a fixing gear (20) is connected to the bottom right end of the fitting ring (8) through a fixing group, so that the fixing gear (20) can be positioned, a fixing block (10) is fixedly connected to the right end of the inner wall of the adjusting tube (5), and a connecting tube (16) is connected to the left end of the connecting tube (16) through a sealing group, so that the connecting tube (16) can be reset; A sealing plate (13), wherein the top end of the sealing plate (13) is threadedly connected to an extrusion rod (18), and the bottom end of the extrusion rod (18) is connected to an expansion airbag (22) via an expansion group, so that the expansion airbag (22) is expanded by air pressure; A fixing ring (3) is provided, wherein four sides of the outer wall of the right end of the fixing ring (3) are fixedly connected to connection blocks (11), and the opposite end of the connection block (11) is connected to a sealing plate (4) through a sealing group for sealing the fixing ring (3) and the sealing plate (4).

2. A check valve according to claim 1, characterized in that: The extrusion group comprises a spring rod (9) fixedly connected to both the front and rear sides of the bottom end of the fitting ring (8), the other end of the spring rod (9) being fixedly connected to the front and rear sides of the inner wall of the adjustment tube (5), and the top end of the adjustment tube (5) being detachably connected to the adjustment rod (6).

3. A check valve according to claim 1, characterized in that: The fixing group includes a fitting block (14) fixedly connected to the right end of the fitting ring (8), the bottom end of the fitting block (14) fits with the outer wall of the fixed gear (20), and the inner wall of the fixed gear (20) is fixedly connected to the outer wall of the right end of the U-shaped tube (15).

4. A check valve according to claim 1, characterized in that: The sealing group comprises a U-shaped tube (15) rotatably connected to the inner wall of the fixed block (10), wherein the front and rear ends of the U-shaped tube (15) are fixedly connected to an extrusion spring (19), and the other end of the extrusion spring (19) is fixedly connected to a connecting tube (16), and the inner wall of the connecting tube (16) is slidably connected to the outer walls of the front and rear sides of the left end of the U-shaped tube (15).

5. A check valve according to claim 4, characterized in that: The right end of the connecting pipe (16) is rotatably connected to a fixing rod (17), and the left end of the fixing rod (17) is rotatably connected to the outer wall of the right end of the sealing plate (13).

6. The check valve according to claim 1, characterized in that: The expansion group comprises a rubber membrane (21) fixedly connected to the bottom end of the inner wall of the sealing plate (13), and the outer wall of the bottom end of the sealing plate (13) is in close contact with the outer wall of the rubber membrane (21).

7. The check valve according to claim 1, characterized in that: The left end of the sealing plate (13) is rotatably connected to a sealing ring (7), and the outer wall of the sealing ring (7) is fixedly connected to the inner wall of the left end of the valve body (1).

8. The check valve according to claim 1, characterized in that: The sealing group includes a return spring (12) fixedly connected to one opposite end of the connecting block (11), the other end of the return spring (12) fixedly connected to the top outer wall of the sealing plate (4), and the outer wall of the opposite end of the sealing plate (4) is rotatably connected to the inner wall of the fixing ring (3).

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