A pressure threshold adjustable check valve

Abstract

The utility model provides a one -way valve of pressure threshold adjustable, including valve body, valve clapper, adjusting assembly, the valve body is along the flow direction of fluid and is located between two section of pipeline, the valve clapper is located in the valve body, is provided with the ring baffle in the valve body, the valve clapper is attached with ring baffle, the outer diameter of valve clapper is greater than the inner diameter of ring baffle, adjusting assembly is located in the valve body, and the output of adjusting assembly is connected with valve clapper through compression spring, and the input of adjusting assembly is fixedly connected with the knob rotationally connected in the outer wall of valve body and is penetrated valve body, one end of compression spring is tightly adjusted assembly, the other end is tightly valve clapper, and the one end of valve clapper is tightly away from compression spring ring baffle, the utility model has the beneficial effects: the pre -tightening force of compression spring is adjusted through adjusting assembly, and then the pressure threshold of valve clapper is controlled, and the input of adjusting assembly is located in the outside of valve body, and the pressure threshold of adjustment is convenient for staff.

Description

Technical Field

[0001] This utility model belongs to the field of one-way valves, and in particular relates to a one-way valve with an adjustable pressure threshold. Background Technology

[0002] A check valve, as a valve that allows fluid to flow in only one direction and prevents fluid from flowing in the opposite direction, is widely used in many fields. It is mainly used to control the flow direction of liquids or gases to ensure the safe and efficient operation of the system.

[0003] Current check valves cannot adjust or have difficulty adjusting their pressure thresholds, which can easily lead to the valves not being able to open or close flexibly according to the actual system pressure. When the pressure threshold is too high, the valve is difficult to open, and the system requires higher pressure to start flow, resulting in increased energy consumption and excessive equipment load. If the pressure threshold is too low, the valve will open when the pressure is below the design pressure, which will not effectively prevent backflow, causing system pressure fluctuations, seal failure, or even liquid or gas backflow that can damage the equipment. It will also exacerbate the abnormal wear of the valve's internal components and shorten its service life. Utility Model Content

[0004] In view of this, the present invention aims to provide a one-way valve with an adjustable pressure threshold, in order to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A one-way valve with an adjustable pressure threshold includes: A valve body is disposed between two sections of pipeline along the flow direction of the fluid; The valve disc is located inside the valve body, and an annular baffle is provided inside the valve body. The valve disc fits into the annular baffle, and the outer diameter of the valve disc is larger than the inner diameter of the annular baffle. An adjustment component is disposed within the valve body. The output end of the adjustment component is connected to the valve disc via a compression spring, and the input end of the adjustment component passes through the valve body and is fixedly connected to a knob rotatably connected to the outer wall of the valve body. One end of the compression spring presses against the adjusting assembly, and the other end presses against the valve disc. The end of the valve disc away from the compression spring presses against the annular baffle.

[0006] Furthermore, the valve body includes: The support part, the valve disc and the adjustment component are both disposed in the support part, and a receiving groove is opened at one end of the support part; The fixing part has a plug pipe fixed at one end that corresponds to the receiving groove, and the plug pipe is threaded into the receiving groove; The annular baffle is located between the receiving groove and the insertion pipe, with the bottom of the receiving groove and the end of the insertion pipe respectively pressing against the two end faces of the annular baffle.

[0007] Furthermore, the adjustment component includes: The bile duct is located within the support portion; A lead screw, which is rotatably connected to the inner tube as the output end of the adjustment component, is provided with a nut on the lead screw, a sliding groove is opened on the inner wall of the inner tube, and a sliding block corresponding to the sliding groove is fixed on the outer wall of the nut, and the sliding block is located in the sliding groove. A sliding tube is fixed at the end of the valve disc away from the annular baffle. The sliding tube is inserted into the bile tube, and the outer wall of the sliding tube is in contact with the inner wall of the bile tube. One end of the compression spring is inserted into the sliding tube, and the other end is tightened against the nut.

[0008] Furthermore, multiple support frames are fixed on the outer wall of the bile duct, and a limiting groove corresponding to the support frame is opened on the inner wall of the bearing part, and the support frame is inserted into the limiting groove.

[0009] Furthermore, a top block is fixed on the end face of the annular baffle near the bearing part, the top block is pressed against one end of the support frame, and the other end of the support frame is pressed against the inner wall of the limiting groove.

[0010] Furthermore, a partition is fixed inside the bile duct, which divides the bile duct into a transmission section and an adjustment section. The lead screw passes through the partition, and one end of the lead screw located in the adjustment section is threadedly connected to a nut. A driven bevel gear is fixed at one end of the lead screw located in the transmission section. The transmission unit is equipped with a drive bevel gear that meshes with the driven bevel gear. The drive bevel gear is fixedly connected to one end of the drive rod, and the other end of the drive rod passes through the tubing and is fixedly connected to a knob that is rotatably connected to the outer wall of the valve body.

[0011] Furthermore, the partition plate has a rotating hole, the lead screw is located inside the rotating hole, and two positioning rings are fixed on the lead screw, which are respectively attached to the two end faces of the partition plate.

[0012] Furthermore, the end of the bile duct furthest from the valve is closed.

[0013] Furthermore, the middle part of the annular baffle bends in the opposite direction of the fluid flow and narrows inward, forming an annular structure with a trapezoidal axial cross section. The end face of the valve disc near the annular baffle is inclined inward, forming a frustum that matches the annular structure. The inclined surface of the frustum is in close contact with the inner wall of the annular structure.

[0014] Compared with the prior art, the one-way valve with adjustable pressure threshold of this utility model has the following advantages: the pressure threshold of the valve disc can be controlled by adjusting the preload of the compression spring through the adjustment component, and the input end of the adjustment component is located outside the valve body, which makes it convenient for the operator to adjust the pressure threshold. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the one-way valve according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the one-way valve according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the adjustment component according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the load-bearing structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the annular baffle structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the bile duct according to an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Bearing part; 11. Receiving groove; 12. Limiting groove; 2. Fixing part; 21. Insertion pipe; 3. Valve disc; 31. Sliding pipe; 4. Annular baffle; 41. Top block; 5. Adjusting component; 51. Inner tube; 511. Sliding groove; 512. Partition; 52. Lead screw; 521. Driven bevel gear; 522. Positioning ring; 53. Nut; 54. Support frame; 55. Drive rod; 551. Drive bevel gear; 552. Knob; 6. Compression spring. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] A one-way valve with an adjustable pressure threshold includes: A valve body is disposed between two sections of pipeline along the flow direction of the fluid; Valve disc 3, the valve disc 3 is located in the valve body, the valve body is provided with an annular baffle 4, the valve disc 3 is in contact with the annular baffle 4, and the outer diameter of the valve disc 3 is larger than the inner diameter of the annular baffle 4. Adjustment component 5 is disposed in the valve body. The output end of adjustment component 5 is connected to valve disc 3 through compression spring 6. The input end of adjustment component 5 passes through the valve body and is fixedly connected to knob 552 which is rotatably connected to the outer wall of the valve body. One end of the compression spring 6 presses against the adjusting component 5, and the other end presses against the valve disc 3. The end of the valve disc 3 away from the compression spring 6 presses against the annular baffle 4.

[0022] The valve body includes: The support part 1, the valve disc 3 and the adjustment component 5 are both disposed in the support part 1, and a receiving groove 11 is opened at one end of the support part 1; The fixing part 2 has a plug tube 21 corresponding to the receiving groove 11 fixed at one end, and the plug tube 21 is threaded into the receiving groove 11; The annular baffle 4 is located between the receiving groove 11 and the insertion tube 21, with the bottom of the receiving groove 11 and the end of the insertion tube 21 respectively pressing against the two end faces of the annular baffle 4.

[0023] The adjustment component 5 includes: The bile duct 51 is located inside the support portion 1; A lead screw 52 is rotatably connected to the inner tube 51 as the output end of the adjustment component 5. A nut 53 is provided on the lead screw 52. A sliding groove 511 is opened on the inner wall of the inner tube 51. A sliding block corresponding to the sliding groove 511 is fixed on the outer wall of the nut 53. The sliding block is located in the sliding groove 511. The valve disc 3 is fixed with a sliding tube 31 at one end away from the annular baffle 4. The sliding tube 31 is inserted into the bile tube 51, and the outer wall of the sliding tube 31 is in contact with the inner wall of the bile tube 51. One end of the compression spring 6 is inserted into the sliding tube 31, and the other end is tightened against the nut 53.

[0024] Multiple support frames 54 are fixed on the outer wall of the bile tube 51, and a limiting groove 12 corresponding to the support frame 54 is opened on the inner wall of the bearing part 1. The support frame 54 is inserted into the limiting groove 12.

[0025] A top block 41 is fixed on the end face of the annular baffle 4 near the bearing part 1. The top block 41 presses against one end of the support frame 54, and the other end of the support frame 54 presses against the inner wall of the limiting groove 12.

[0026] A partition 512 is fixedly provided inside the bile tube 51, which divides the bile tube 51 into a transmission part and an adjustment part. The lead screw 52 passes through the partition 512. One end of the lead screw 52 located in the adjustment part is threadedly connected to the nut 53. A driven bevel gear 521 is fixedly provided at one end of the lead screw 52 located in the transmission part. The transmission unit is provided with a drive bevel gear 551 that meshes with the driven bevel gear 521. The drive bevel gear 551 is fixedly connected to one end of the drive rod 55, and the other end of the drive rod 55 passes through the tubing 51 and is fixedly connected to a knob 552 that is rotatably connected to the outer wall of the valve body.

[0027] The partition 512 has a rotating hole, and the lead screw 52 is located inside the rotating hole. Two positioning rings 522 are fixed on the lead screw 52, ​​and the two positioning rings 522 are respectively attached to the two end faces of the partition 512.

[0028] The end of the bile duct 51 away from the valve disc 3 is closed.

[0029] The middle part of the annular baffle 4 bends in the opposite direction of the fluid flow and narrows inward, forming an annular structure with a trapezoidal axial cross section. The end face of the valve disc 3 near the annular baffle 4 is inclined inward, forming a frustum that matches the annular structure. The inclined surface of the frustum is in close contact with the inner wall of the annular structure.

[0030] In some embodiments, a silicone sealing gasket is fixed on the outer wall of the valve disc 3, and a silicone sealing gasket is fixed on the end face of the annular baffle 4 near the bearing portion 1.

[0031] Work process: Rotating the knob 552 causes the drive rod 55 to rotate. The drive bevel gear 551 at the end of the drive rod 55 rotates with the drive rod 55. The driven bevel gear 521, which meshes with the drive bevel gear 551, transmits the torque applied by the drive rod 55 to the lead screw 52. The lead screw 52 rotates in the direction of the torque. The nut 53 moves along the sliding groove 511 under the action of the external thread of the lead screw 52, ​​presenting two working conditions. In the first working condition, the nut 53 moves towards the fixed part 2, the preload of the compression spring 6 increases, the pressure applied by the compression spring 6 to the valve disc 3 increases, the force of the valve disc 3 in the opposite direction of the fluid flow increases, and the pressure threshold of the fluid pushing the valve disc 3 to move increases. In the second operating condition, the nut 53 moves away from the fixed part 2, the preload of the compression spring 6 decreases, the pressure applied by the compression spring 6 to the valve disc 3 decreases, the force of the valve disc 3 in the opposite direction of the fluid flow decreases, and the pressure threshold of the fluid pushing the valve disc 3 to move decreases.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A one-way valve with adjustable pressure threshold, characterized in that, include: A valve body is disposed between two sections of pipeline along the flow direction of the fluid; Valve disc (3), the valve disc (3) is located in the valve body, and an annular baffle (4) is provided in the valve body. The valve disc (3) fits against the annular baffle (4), and the outer diameter of the valve disc (3) is larger than the inner diameter of the annular baffle (4). Adjustment component (5), the adjustment component (5) is disposed in the valve body, the output end of the adjustment component (5) is connected to the valve disc (3) through the compression spring (6), and the input end of the adjustment component (5) passes through the valve body and is fixedly connected to the knob (552) rotatably connected to the outer wall of the valve body; One end of the compression spring (6) presses against the adjusting assembly (5), and the other end presses against the valve disc (3). The end of the valve disc (3) away from the compression spring (6) presses against the annular baffle (4).

2. The one-way valve with adjustable pressure threshold according to claim 1, characterized in that, The valve body includes: The support part (1) is provided with the valve disc (3) and the adjustment component (5) both located in the support part (1), and a receiving groove (11) is provided at one end of the support part (1). The fixing part (2) has a plug tube (21) corresponding to the receiving groove (11) fixed at one end, and the plug tube (21) is threaded into the receiving groove (11); The annular baffle (4) is located between the receiving groove (11) and the insertion tube (21), with the bottom of the receiving groove (11) and the end of the insertion tube (21) respectively pressing against the two end faces of the annular baffle (4).

3. The one-way valve with adjustable pressure threshold according to claim 2, characterized in that, The adjustment component (5) includes: The bile duct (51) is located within the support portion (1); A lead screw (52) is rotatably connected to the inner tube (51) as the output end of the adjustment component (5). A nut (53) is provided on the lead screw (52). A sliding groove (511) is opened on the inner wall of the inner tube (51). A sliding block corresponding to the sliding groove (511) is fixed on the outer wall of the nut (53). The sliding block is located in the sliding groove (511). The valve disc (3) is fixed with a sliding tube (31) at one end away from the annular baffle (4). The sliding tube (31) is inserted into the bile tube (51), and the outer wall of the sliding tube (31) is in contact with the inner wall of the bile tube (51). One end of the compression spring (6) is inserted into the sliding tube (31), and the other end is tightened against the nut (53).

4. A one-way valve with adjustable pressure threshold according to claim 3, characterized in that: Multiple support frames (54) are fixed on the outer wall of the bile duct (51), and a limiting groove (12) corresponding to the support frame (54) is opened on the inner wall of the bearing part (1), and the support frame (54) is inserted into the limiting groove (12).

5. A one-way valve with adjustable pressure threshold according to claim 4, characterized in that: A top block (41) is fixed on the end face of the annular baffle (4) near the bearing part (1). The top block (41) presses against one end of the support frame (54), and the other end of the support frame (54) presses against the inner wall of the limiting groove (12).

6. A one-way valve with adjustable pressure threshold according to claim 3, characterized in that: A partition (512) is fixedly provided inside the bile duct (51). The partition (512) divides the bile duct (51) into a transmission part and an adjustment part. The lead screw (52) passes through the partition (512). One end of the lead screw (52) located in the adjustment part is threadedly connected to the nut (53). One end of the lead screw (52) located in the transmission part is fixedly provided with a driven bevel gear (521). The transmission unit is provided with a drive bevel gear (551) that meshes with the driven bevel gear (521). The drive bevel gear (551) is fixedly connected to one end of the drive rod (55). The other end of the drive rod (55) passes through the tubing (51) and is fixedly connected to a knob (552) that is rotatably connected to the outer wall of the valve body.

7. A one-way valve with adjustable pressure threshold according to claim 6, characterized in that: The partition (512) has a rotating hole, and the lead screw (52) is located inside the rotating hole. Two positioning rings (522) are fixed on the lead screw (52), and the two positioning rings (522) are respectively attached to the two end faces of the partition (512).

8. A one-way valve with adjustable pressure threshold according to claim 3, characterized in that: The end of the bile duct (51) away from the valve (3) is closed.

9. A one-way valve with adjustable pressure threshold according to claim 1, characterized in that: The middle part of the annular baffle (4) bends in the opposite direction of the fluid flow and narrows inward, forming an annular structure with a trapezoidal axial cross section. The valve disc (3) is inclined inward at the end face near the annular baffle (4), forming a frustum that matches the annular structure. The inclined surface of the frustum is in close contact with the inner wall of the annular structure.

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