One-way valve capable of adjusting opening pressure

Abstract

The invention discloses a one-way valve capable of adjusting the opening pressure, and relates to the technical field of valves.The one-way valve capable of adjusting the opening pressure comprises a valve body, a positioning plate, a valve element, a pressure adjusting structure and a pressure applying structure.The pressure adjusting structure comprises a pressure adjusting screw and a locking nut, and the positioning plate is provided with a first threaded hole and a circulation hole; the pressure adjusting screw is in threaded fit with the first threaded hole and can be movably adjusted in the axial direction, a pressure adjusting part is arranged at the end, away from the valve element, of the pressure adjusting screw, and the locking nut is provided with a second threaded hole and is in threaded connection with the pressure adjusting screw so that the pressure adjusting screw can be locked to the positioning plate. When an operator carries out adjustment, the pressure adjusting screw rod is directly rotated through the pressure adjusting part, the pressure adjusting screw rod rotates and moves in the axial direction so as to abut against the pressure applying structure, the compression amount of the pressure applying structure is changed, the pressure acting on the valve element is changed at the same time, and the opening pressure of the one-way valve is increased or decreased accordingly, so that the one-way valve can cope with different fluids; and the applicability is higher in scenes with different pressure requirements.

Description

Technical Field

[0001] The invention relates to the field of valve technology, in particular to a one-way valve with adjustable opening pressure. Background Art

[0002] A one-way valve is a fluid control structure that is mainly used to control the flow of fluid (such as liquid or gas) in one direction and prevent it from flowing in the opposite direction. This valve is often used in many industries and engineering, such as in hydraulic systems, pipeline systems, pump stations and various mechanical equipment.

[0003] A one-way valve is usually composed of a valve body, a valve core and a pressure structure. There is a channel inside the valve body, and the channel wall is formed with a stop flange, through which the fluid flows. Under normal working conditions, when the fluid pressure reaches the opening pressure value of the one-way valve, the valve core is pushed to leave the stop flange, thereby allowing the fluid to pass through the valve. When the fluid stops flowing or flows in the reverse direction, the valve core automatically closes under the action of the pressure structure force to prevent the fluid from flowing in the reverse direction.

[0004] However, the pressure-applying structure of an existing one-way valve is usually a spring, one end of which is relatively fixed to a positioning plate fixed to the wall of the fluid channel, and the other end of the spring presses against the valve core. The maximum distance between the positioning plate and the valve core is constant, so the maximum length of the spring is constant, and the opening pressure value of the one-way valve is constant. Therefore, the applicability of the one-way valve is poor and it can only be used in a specific scenario. Summary of the invention

[0005] The main purpose of the present invention is to provide a one-way valve with adjustable opening pressure, aiming to improve the applicability of the one-way valve with adjustable opening pressure.

[0006] To achieve the above object, the present invention provides a one-way valve with adjustable opening pressure, comprising: A valve body, wherein a fluid channel is provided in the valve body, a stop flange and a plurality of guide ribs are convexly provided on the wall surface of the fluid channel, and one end of the plurality of guide ribs is connected to one side of the stop flange; A positioning plate, the positioning plate is provided with a first threaded hole and a flow hole, the periphery of the positioning plate is connected to the wall surface of the fluid channel, and is located at an end of the guide rib away from the stop flange; A valve core, the outer periphery of which is slidably matched with the plurality of guide ribs; A pressure regulating structure, the pressure regulating structure comprising a pressure regulating screw and a locking nut, the pressure regulating screw is threadedly matched with the first threaded hole and can be adjusted axially, a pressure regulating portion is provided at one end of the pressure regulating screw away from the valve core, the locking nut is provided with a second threaded hole and is threadedly connected to the pressure regulating screw to lock the pressure regulating screw to the positioning plate; and, A pressure-applying structure is installed under pressure between the valve core and the pressure-adjusting screw, and has a tendency to stretch along the extending direction of the fluid channel so that one side edge of the valve core abuts against the stop flange.

[0007] In some embodiments of the present invention, the pressure-regulating screw includes a rod body and a head connected to one end of the rod body, the radial dimension of the head is larger than the first threaded hole, the rod body is threadedly matched with the first threaded hole, and the head is connected to the pressure structure.

[0008] In some embodiments of the present invention, the pressure regulating portion is a polygonal groove opened on the end surface of the rod body.

[0009] In some embodiments of the present invention, an annular assembly step is formed on the periphery of the head, and the pressure structure is a compression spring, one end of the compression spring is sleeved outside the annular assembly step.

[0010] In some embodiments of the present invention, the annular assembly step is provided with at least two levels.

[0011] In some embodiments of the present invention, the pressure regulating structure further includes a clamping ring, a second annular clamping groove is formed on the circumference of the rod body, and the clamping ring is installed in the second annular clamping groove to limit the movement of the rod body in a direction close to the valve core; An axial end of the locking nut is provided with a mounting groove, a bottom of the mounting groove is provided with the second threaded hole, the mounting groove is aligned with the second annular groove, and the retaining ring is mounted in the mounting groove.

[0012] In some embodiments of the present invention, when the head portion abuts against the positioning plate, the distance between the retaining ring and the positioning plate reaches a maximum value a, and the distance between the two ends of the pressure structure respectively connecting the head portion and the valve core reaches a maximum value b, and the proportional relationship between a and b is: 1 / 4≤a / b≤1 / 2.

[0013] In some embodiments of the present invention, the pressure regulating structure also includes an annular retaining spring, a first annular retaining groove is opened on the wall surface of the fluid channel, the first annular retaining groove is spaced apart from the plurality of guide ribs, the annular retaining spring is installed in the first annular retaining groove, and the positioning plate is limited between the annular retaining spring and the end faces of the plurality of guide ribs.

[0014] In some embodiments of the present invention, the annular retaining spring is a double-layer spiral retaining spring.

[0015] In some embodiments of the present invention, the periphery of the positioning plate facing the valve core is provided with spaced positioning grooves, and one end of one of the guide ribs is assembled in one of the positioning grooves.

[0016] In actual application, the one-way valve with adjustable opening pressure in the technical solution of the present invention can allow fluid to enter through one side of the valve core of the fluid channel. When the pressure of the fluid reaches the opening pressure of the valve core, the valve core is pushed open, and the fluid can pass through the gap between the valve core and the stop flange, and then flow out from the other end of the fluid channel through the flow hole.

[0017] The operator can adjust the pressure of the pressure-applying structure by operating the pressure-adjusting structure, thereby changing the opening pressure value of the valve core. Specifically, when adjusting, the pressure-adjusting screw is directly rotated through the pressure-adjusting part, and the pressure-adjusting screw rotates and moves axially, thereby pressing against the pressure-applying structure, and the compression amount of the pressure-applying structure changes, and the pressure acting on the valve core changes at the same time, and the opening pressure of the one-way valve with adjustable opening pressure also increases or decreases accordingly, so that the one-way valve with adjustable opening pressure can cope with different fluids and different pressure requirements, and has higher applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a one-way valve with adjustable opening pressure provided by the present invention from a first perspective; Figure 2 A schematic structural diagram of an embodiment of a one-way valve with adjustable opening pressure provided by the present invention from another perspective; Figure 3 A cross-sectional view of an embodiment of a one-way valve with adjustable opening pressure provided by the present invention; Figure 4 Another cross-sectional view of an embodiment of a one-way valve with adjustable opening pressure provided by the present invention; Figure 5 A cross-sectional view of an embodiment of a one-way valve with adjustable opening pressure provided by the present invention from another perspective; Figure 6 A schematic diagram of the structure of a valve body of a one-way valve with adjustable opening pressure provided by the present invention; Figure 7 A schematic structural diagram of a locking nut of a one-way valve with adjustable opening pressure provided by the present invention; Figure 8 A schematic structural diagram of the valve body of the one-way valve with adjustable opening pressure provided by the present invention from another perspective.

[0020] Description of Figure Numbers: 100. One-way valve with adjustable opening pressure; 11. Valve body; 111. Fluid channel; 112. Stop flange; 113. Guide rib; 114. First annular groove; 12. Valve core; 13. Pressure regulating structure; 131. Pressure regulating screw; 1311. Rod body; 1312. Head; 1313. Annular assembly step; 1314. Pressure regulating part; 1315. Second annular groove; 132. Positioning plate; 1321. Flow hole; 1322. Positioning groove; 1323. First threaded hole; 133. Locking nut; 1331. Assembly groove; 1332. Liquid-repelling hole; 1333. Second threaded hole; 134. Annular retaining ring; 135. Retaining ring; 14. Pressure-applying structure.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] See also Figures 1 to 3The present invention proposes a one-way valve 100 with adjustable opening pressure, comprising a valve body 11, a positioning plate 132, a valve core 12, a pressure regulating structure 13 and a pressure applying structure 14, wherein a fluid channel 111 is arranged in the valve body 11, a stop flange 112 and a plurality of guide ribs 113 are convexly arranged on the wall surface of the fluid channel 111, and one end of the plurality of guide ribs 113 is connected to one side of the stop flange 112; the periphery of the positioning plate 132 is connected to the wall surface of the fluid channel and is located at the end of the guide rib 113 away from the stop flange 112; the outer periphery of the valve core 12 is slidably matched with the plurality of guide ribs 113; the pressure regulating structure 13 comprises a pressure regulating screw 131 and a locking nut 133, The positioning plate 132 is provided with a first threaded hole 1323 and a flow hole 1321, the pressure regulating screw 131 is threadedly matched with the first threaded hole 1323 and can be axially movable and adjusted, the end of the pressure regulating screw 131 away from the valve core 12 is provided with a pressure regulating portion 1314, the locking nut 133 is provided with a second threaded hole 1333 and is threadedly connected to the pressure regulating screw 131 to lock the pressure regulating screw 131 to the positioning plate 132; the pressure-applying structure 14 is installed under pressure between the valve core 12 and the pressure-adjusting screw 131, and the pressure-applying structure 14 has a tendency to stretch along the extension direction of the fluid channel 111, so that one side edge of the valve core 12 abuts against the stop flange 112.

[0026] The valve body 11 is made of a rigid material, generally metal, but also plastic, and can cope with scenarios with lower fluid pressure. There are generally at least three guide ribs 113 in the valve body 11, and at least three guide ribs 113 are evenly spaced around the valve core 12 to ensure the stability of the valve core 12 when sliding. Due to the presence of the guide ribs 113, a gap is formed between the periphery of the valve core 12 and the inner wall of the valve core 12 for fluid circulation.

[0027] The valve core 12 generally includes a rigid valve seat and a sealing gasket connected to one side of the valve seat. The valve seat is slidably connected to the guide rib 113. The sealing gasket is used to resist the stop flange 112 to block the fluid channel. The pressure structure 14 can be a compression spring, a bellows, or two magnetically repelling structures, which can generate continuous pressure on the positioning plates 132 at both ends and the valve core 12, and can generate deformation to restore the original state.

[0028] In actual application, the one-way valve 100 with adjustable opening pressure in the technical solution of the present invention can allow fluid to enter through one side of the valve core 12 of the fluid channel. When the pressure of the fluid reaches the opening pressure of the valve core 12, the valve core 12 is pushed open, and the fluid can pass through the gap between the valve core 12 and the stop flange 112, and then flow out from the other end of the fluid channel through the flow hole 1321.

[0029] The operator can adjust the pressure of the pressure-applying structure 14 by operating the pressure-adjusting structure 13, thereby changing the opening pressure value of the valve core 12. Specifically, when adjusting, the pressure-adjusting screw 131 is directly rotated through the pressure-adjusting part 1314, and the pressure-adjusting screw 131 rotates and moves axially, thereby pressing against the pressure-applying structure 14, and the compression amount of the pressure-applying structure 14 changes, and the pressure acting on the valve core 12 changes at the same time, and the opening pressure of the one-way valve also increases or decreases accordingly, so that the one-way valve can cope with different fluids and different pressure requirements, and has higher applicability.

[0030] Further, in some embodiments of the present invention, the pressure regulating screw 131 includes a rod body 1311 and a head 1312 connected to one end of the rod body 1311, the radial dimension of the head 1312 is larger than the first threaded hole 1323, the rod body 1311 is threadedly matched with the first threaded hole 1323, and the head 1312 is connected to the pressure structure 14. The head 1312 can limit the pressure regulating screw 131 from being disengaged from the first threaded hole 1323 of the positioning plate 132 during rotation, and the larger head 1312 is convenient for connecting with the pressure structure 14, and can match the larger pressure structure 14, so that the pressure structure 14 acts on the valve core 12 with a larger area, which is conducive to preventing the valve core 12 from tilting and improving the stability of the one-way valve.

[0031] The above-mentioned adjustment part is used to facilitate the operator to rotate the pressure-adjusting screw 131. The structure of the adjustment part is various. For example, the adjustment part is set as a torsion bar convexly arranged on the opposite sides of the pressure-adjusting screw 131, and the operator can twist the pressure-adjusting screw 131 through the torsion bar. Preferably, in some embodiments of the present invention, the pressure-adjusting part 1314 is a polygonal groove opened on the end face of the rod body 1311. Such a setting can avoid the part of the structure of the pressure-adjusting screw 131 protruding outward, forming an obstacle for the operator to adjust the locking nut 133, and can also avoid obstruction to the fluid, and the pressure-adjusting screw 131 is not subjected to additional fluid impact force, which is conducive to extending the service life.

[0032] In some embodiments of the present invention, an annular assembly step 1313 is formed on the periphery of the head 1312, and the pressure structure 14 is a compression spring, and one end of the compression spring is sleeved outside the annular assembly step 1313. In this arrangement, during assembly, only one end of the compression spring needs to be sleeved outside the annular assembly step 1313, which is more convenient, and the annular assembly step 1313 can effectively limit the radial movement of one end of the compression spring to prevent the compression spring from twisting and falling off.

[0033] Furthermore, in some embodiments of the present invention, the annular assembly step 1313 is provided with at least two levels. In this way, the annular assembly steps 1313 of different levels can be adapted to compression springs of different sizes, and can also realize nested installation of multi-layer compression springs, thereby ensuring the stability of the multi-layer compression springs during operation and avoiding interference between adjacent compression springs.

[0034] In order to prevent the operator from screwing the pressure-adjusting bolt too deeply when adjusting the pressure-adjusting bolt, which may cause the pressure-applying structure 14 to be compressed to near the limit, thereby limiting the movement range of the valve core 12 and further affecting the flow rate of the one-way valve, in some embodiments of the present invention, the pressure-adjusting structure 13 also includes a retaining ring 135, and a second annular retaining groove 1315 is provided on the circumferential side of the rod body 1311, and the retaining ring 135 is installed in the second annular retaining groove 1315 to limit the movement of the rod body 1311 in the direction approaching the valve core 12; an axial end of the locking nut 133 is provided with an assembly groove 1331, and the bottom of the assembly groove 1331 is provided with the second threaded hole 1333, and the assembly groove 1331 is aligned with the second annular retaining groove 1315, and the retaining ring 135 is assembled in the assembly groove 1331.

[0035] Through the above scheme, the retaining ring 135 is installed in the second annular groove 1315, which limits the movement of the rod body 1311 in the direction close to the valve core 12. This helps to prevent the pressure regulating screw 131 from excessively compressing the pressure structure 14 (such as a compression spring) under the action of pressure. On the one hand, it can protect the pressure structure 14, and on the other hand, it can ensure the maximum movement of the valve core 12.

[0036] In some embodiments of the present invention, a liquid-repelling hole 1332 is formed on the groove wall of the assembly groove 1331 to prevent liquid from being retained in the assembly groove 1331 .

[0037] See also Figure 4 In some embodiments of the present invention, when the head 1312 abuts against the positioning plate 132, the distance between the retaining ring 135 and the positioning plate 132 reaches a maximum value a, and the distance between the two ends of the pressure structure 14 connecting the head 1312 and the valve core 12 respectively reaches a maximum value b, and the ratio of a to b is: 1 / 4≤a / b≤1 / 2. Specifically, it can be 1 / 4, 1 / 3, 2 / 5, 1 / 2, etc. In this way, keeping the values ​​of a and b within an appropriate range can ensure that the pressure structure 14 maintains stable performance during compression and extension, avoids performance degradation or damage of the pressure structure 14 due to excessive compression, and also avoids the problem that the distance between the retaining ring 135 and the positioning plate 132 reaches a relatively small maximum value a, resulting in the pressure applied by the pressure structure 14 to the valve core 12 not changing much during the switching process between the two extreme positions of the pressure regulating screw 131 in the axial direction, and the regulating effect is not significant.

[0038] See also Figures 5 to 7There are many specific implementations of fixing the positioning plate 132 in the valve body 11. For example, the periphery of the positioning plate 132 is threadedly connected to the inner wall of the valve body 11. Preferably, in some embodiments of the present invention, the pressure regulating structure 13 also includes an annular retaining spring 134. The wall surface of the fluid channel 111 is provided with a first annular retaining groove 114. The first annular retaining groove 114 is spaced apart from the plurality of guide ribs 113. The annular retaining spring 134 is installed in the first annular retaining groove 114. The positioning plate 132 is limited between the annular retaining spring 134 and the end faces of the plurality of guide ribs 113. The positioning plate 132 has high installation stability and is convenient for assembly and maintenance.

[0039] The annular retaining spring 134 may be a common single-layer retaining spring for a hole. In some embodiments of the present invention, the annular retaining spring 134 is a double-layer helical retaining spring. The double-layer helical retaining spring provides a stronger clamping force than the single-layer retaining spring, and can more stably fix the positioning plate 132 to prevent it from moving or rotating in the fluid channel 111. In addition, when the double-layer helical retaining spring is used, the size and position accuracy of the first annular retaining groove 114 are less required, and the process cost is lower.

[0040] In some embodiments of the present invention, the circumference of the positioning plate 132 facing the valve core 12 is provided with spaced positioning grooves 1322, and one end of the guide rib 113 is assembled in the positioning groove 1322. In this way, the positioning plate 132 can be limited in the circumferential direction by the guide rib 113, so as to prevent the positioning plate 132 from being rotated by the fluid impact, thereby causing the pressure regulating structure 13 and the pressure applying structure 14 to wear and abnormal noise. When the operator rotates the pressure regulating screw 131, there is no need to fix the positioning plate 132, so that the adjustment is convenient.

[0041] See also Figure 8 In some embodiments of the present invention, the guide rib 113 is configured as a strip rib plate with a fan-shaped cross section, and the curvature c of the fan-shaped cross section of the guide rib 113 is not less than π / 12 and not greater than π / 4, and can be specifically π / 12, π / 8, π / 6, π / 4, etc. In this way, the guide rib 113 can provide stable support for the sliding of the valve core 12 to prevent it from tilting, and the flow area of ​​the fluid channel can be guaranteed, so that the fluid can pass smoothly.

[0042] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A one-way valve with adjustable opening pressure, characterized in that: include: A valve body, wherein a fluid channel is provided in the valve body, a stop flange and a plurality of guide ribs are convexly provided on the wall surface of the fluid channel, and one end of the plurality of guide ribs is connected to one side of the stop flange; A positioning plate, the positioning plate is provided with a first threaded hole and a flow hole, the periphery of the positioning plate is connected to the wall surface of the fluid channel, and is located at an end of the guide rib away from the stop flange; A valve core, the outer periphery of which is slidably matched with the plurality of guide ribs; A pressure regulating structure, the pressure regulating structure comprising a pressure regulating screw and a locking nut, the pressure regulating screw is threadedly matched with the first threaded hole and can be adjusted axially, a pressure regulating portion is provided at one end of the pressure regulating screw away from the valve core, the locking nut is provided with a second threaded hole and is threadedly connected to the pressure regulating screw to lock the pressure regulating screw to the positioning plate; and, A pressure-applying structure is installed under pressure between the valve core and the pressure-adjusting screw, and has a tendency to stretch along the extending direction of the fluid channel so that one side edge of the valve core abuts against the stop flange.

2. The one-way valve with adjustable opening pressure according to claim 1, characterized in that: The pressure regulating screw comprises a rod body and a head connected to one end of the rod body, the radial dimension of the head is larger than the first threaded hole, the rod body is threadedly matched with the first threaded hole, and the head is connected to the pressure structure.

3. The one-way valve with adjustable opening pressure according to claim 2, characterized in that: The pressure regulating portion is a polygonal groove opened on the end surface of the rod body.

4. The one-way valve with adjustable opening pressure according to claim 2, characterized in that: An annular assembly step is formed on the periphery of the head, and the pressure structure is a compression spring, one end of which is sleeved outside the annular assembly step.

5. The one-way valve with adjustable opening pressure according to claim 4, characterized in that: The annular assembly step is provided with at least two steps.

6. The one-way valve with adjustable opening pressure according to claim 2, characterized in that: The pressure regulating structure further includes a clamping ring, a second annular clamping groove is formed on the circumference of the rod body, and the clamping ring is installed in the second annular clamping groove to limit the movement of the rod body toward the valve core; An axial end of the locking nut is provided with a mounting groove, a bottom of the mounting groove is provided with the second threaded hole, the mounting groove is aligned with the second annular groove, and the retaining ring is mounted in the mounting groove.

7. The one-way valve with adjustable opening pressure according to claim 6, characterized in that: When the head abuts against the positioning plate, the distance between the retaining ring and the positioning plate reaches a maximum value a, and the distance between the two ends of the pressure structure connecting the head and the valve core reaches a maximum value b, and the ratio of a to b is: 1 / 4≤a / b≤1 / 2.

8. A one-way valve with adjustable opening pressure according to any one of claims 2 to 7, characterized in that: The pressure regulating structure also includes an annular retaining spring. A first annular retaining groove is formed on the wall of the fluid channel. The first annular retaining groove is spaced apart from the plurality of guide ribs. The annular retaining spring is installed in the first annular retaining groove. The positioning plate is limited between the annular retaining spring and the end faces of the plurality of guide ribs.

9. The one-way valve with adjustable opening pressure according to claim 8, characterized in that: The annular retaining spring is a double-layer spiral retaining spring.

10. The one-way valve with adjustable opening pressure according to any one of claims 1 to 7, characterized in that: The periphery of the positioning plate facing the valve core is provided with spaced positioning grooves, and one end of a guide rib is assembled in one of the positioning grooves.

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