Low resistance clamp check valve

Abstract

The utility model belongs to check valve technical field especially a low resistance pair of clamping check valve, aiming at the pair of clamping check valve existing flow regulation function loss, difficult to adapt to different working conditions, and the valve is unstable easily, lead to the problem of not tight, influence service life and system, present the following scheme, including valve body, the valve body is equipped with liquid inlet and liquid outlet, the liquid outlet is equipped with fixed ring, be equipped with adjusting assembly component on the fixed ring, the adjusting assembly includes first adjusting plate and second adjusting plate, in the utility model, through adjusting assembly can flexible adjustment fluid passing area, solve flow regulation problem, in terms of sealing performance, double sealing structure combines stable check plate movement design, prevent medium backflow leakage, on the maintenance convenience, the connection mode of fixed ring and valve body is convenient for integral taking out adjusting assembly and check assembly, reduce dismounting difficulty, shorten maintenance time, improve equipment maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, and in particular to a low-resistance wafer check valve. Background Technology

[0002] Wafer check valves are widely used in fluid pipeline systems to prevent backflow of media. The traditional structure usually includes a valve body, valve disc and return spring. The valve disc is opened by the pressure of the medium and closed by the spring force when the flow is reversed.

[0003] In existing technologies, wafer check valves generally lack flow regulation functionality and often employ a fixed flow channel design, making it difficult to adjust the medium throughput capacity according to different operating conditions. If flow control is required, an additional regulating valve must be installed, which not only increases system complexity but also raises costs. Furthermore, the check plate is prone to instability such as swaying, jamming, or displacement under fluid impact, leading to inadequate sealing or even seal failure upon closure. This severely impacts the service life of the check valve and the reliability of system operation. Therefore, we propose a low-resistance wafer check valve to address these issues. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing wafer check valves, such as lack of flow regulation function, difficulty in adapting to different working conditions, and unstable valve discs leading to poor sealing, affecting service life and system performance. Therefore, this invention proposes a low-resistance wafer check valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A low-resistance clamp check valve includes a valve body with an inlet and an outlet. A fixing ring is provided at the outlet, and an adjustment component is provided on the fixing ring. The adjustment component includes a first adjustment plate and a second adjustment plate. Both the first and second adjustment plates are provided with multiple through holes. The first and second adjustment plates can move relative to each other to change the degree of overlap of the through holes, thereby adjusting the fluid passage area.

[0007] The fixed ring is also provided with a check valve assembly, which includes a slide rod, a spring and a check valve plate. The slide rod is slidably connected in the slide holes opened in the first adjusting plate and the second adjusting plate. The spring is sleeved on the slide rod, and the two ends of the spring abut against the top of the first adjusting plate and the bottom of the check valve plate, respectively. The check valve plate is sleeved on the slide rod to seal the liquid inlet.

[0008] The valve body is provided with a limiting component, which includes a limiting rod and a limiting plate. The limiting rod is disposed on the check plate, and the limiting plate is disposed on the inner wall of the valve body. The limiting rod and the limiting plate are slidably connected. When fluid flows in from the inlet, the fluid pressure pushes the check plate to slide upward against the spring force, and the fluid flows out through the through hole. When the fluid stops or flows backward, the spring pushes the check plate to move downward to seal the inlet.

[0009] In one possible design, the adjustment assembly further includes two limiting blocks and multiple limiting grooves. The two limiting blocks are symmetrically fixed at the bottom of the first adjustment plate, and the limiting grooves are formed on the second adjustment plate. The two limiting blocks are engaged with the corresponding limiting grooves. By engaging the limiting blocks with the limiting grooves, the relative positions of the first and second adjustment plates are fixed to prevent movement caused by liquid impact.

[0010] In one possible design, the outer wall of the valve body is symmetrically provided with four mounting holes, each of which is provided with a fixing bolt. The fixing ring is provided with threaded holes corresponding to the fixing bolts. The four fixing bolts are threadedly connected to the threaded holes respectively. The inside of the fixing ring is provided with a placement groove. The first adjusting plate and the second adjusting plate are both placed in the placement groove. The adjusting assembly and the check assembly can be removed as a whole by removing the fixing bolts.

[0011] In one possible design, the check valve assembly further includes a rubber pad, a gasket, and a limiting bolt. The rubber pad is fitted onto the slide rod and located above the check valve plate. The gasket is fitted onto the slide rod and located above the rubber pad. The limiting bolt is threaded to the top of the slide rod and is used to fix the check valve plate, the rubber pad, and the gasket. The check valve assembly components can be removed by disassembling the limiting bolt.

[0012] In one possible design, the valve body has a sealing groove on its top inner wall, and the rubber gasket is embedded in the sealing groove. When the check plate moves downward, the rubber gasket and the sealing groove form a double seal.

[0013] In one possible design, each of the two limiting rods has a groove at one end that is far apart from each other. The two grooves are slidably connected to the corresponding limiting plates to ensure that the check plate moves stably and to prevent swaying or jamming.

[0014] In one possible design, annular grooves are provided at both the top and bottom of the valve body for mounting and fixing the valve body.

[0015] In one possible design, the bottoms of both limiting plates abut against the top of the first adjusting plate, providing support to stabilize the adjusting assembly.

[0016] In this application, when fluid flows in from the inlet at the top of the valve body, the fluid pressure pushes the check plate to overcome the spring force and slide upward along the slide rod. At this time, the two limit rods on the check plate are provided with sliding grooves and slide synchronously with the limit plate to achieve stable movement of the check plate. At the same time, the rounded corners of the check plate edge design ensure that the check plate will not deviate during movement, avoiding the turbulence resistance caused by the check plate tilting. The fluid flows out through the radially distributed through holes on the first and second adjustment plates. The inner wall of the placement groove of the fixing ring is polished to keep the fluid in a laminar state after passing through the adjustment hole, reducing eddy current loss.

[0017] When the fluid stops flowing or shows a tendency to backflow, the spring restores its elastic deformation, pushing the check plate downward to fit tightly against the inlet. The rubber gasket is embedded in the sealing groove to form a seal, achieving a highly efficient and reliable seal and preventing the medium from flowing back.

[0018] When maintenance or flow adjustment of the components on the fixed ring is required, the fixed ring can be separated from the valve body by removing the fixing bolts that are threadedly connected to the fixed ring in the mounting hole on the outer wall of the valve body. Since the first and second adjusting plates are located in the placement groove inside the fixed ring, the two adjusting plates can be directly inspected and repaired. At the same time, by adjusting the relative positions of the first and second adjusting plates, the overlap of the through holes can be changed, thereby adjusting the flow of the check valve. In addition, by removing the limiting bolts at the top of the slide rod, the gasket, rubber pad, check plate, and other check valve components can be removed in sequence for maintenance. This design reduces the maintenance difficulty of the adjusting and check valve components, shortens the maintenance time, and effectively improves the equipment maintenance efficiency.

[0019] Beneficial effects: In this utility model, the low-resistance clamp check valve, by setting an adjustment component consisting of a first adjustment plate and a second adjustment plate on the fixed ring, utilizes the staggered superposition of the through holes of the two plates, combined with the snap-fit ​​structure of the limiting block and the limiting groove, to flexibly adjust the fluid passage area, effectively solving the problem of difficult flow adjustment of traditional check valves, and greatly improving the applicability of the check valve and the system operating efficiency.

[0020] In this utility model, the low-resistance clamp check valve uses the elastic action of the spring in the check assembly to make the check plate tightly fit the inlet. Combined with the sealing design of the rubber gasket and the sealing groove, a double sealing structure is formed. At the same time, the sliding cooperation between the limit rod and the limit plate ensures the stable movement of the check plate. Even under large fluctuations in fluid pressure, it can effectively prevent backflow and leakage of the medium, thereby enhancing the sealing reliability of the check valve and the safety of system operation.

[0021] In this utility model, the low-resistance clamp check valve has a fixing ring that is fixed to the mounting hole by a fixing bolt. The adjusting component and the check component can be removed as a whole by removing the bolt, which reduces the difficulty of disassembling the adjusting component and the check component, shortens the maintenance time, effectively reduces the maintenance cost, and improves the equipment maintenance efficiency.

[0022] In this invention, the fluid flow area can be flexibly adjusted by adjusting the components, solving the problem of flow regulation; in terms of sealing performance, the double sealing structure combined with the stable check plate movement design prevents medium backflow and leakage; in terms of maintenance convenience, the connection method between the fixing ring and the valve body makes it easy to remove the adjusting components and check components as a whole, reducing disassembly difficulty, shortening maintenance time, and improving equipment maintenance efficiency. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a low-resistance clamp check valve proposed in this utility model.

[0024] Figure 2 This is a schematic diagram of the localized explosion structure of a low-resistance clamp check valve proposed in this utility model.

[0025] Figure 3 This is a partial exploded view of another low-resistance clamp check valve proposed in this utility model;

[0026] Figure 4 This is a three-dimensional structural diagram of the valve body of a low-resistance clamp check valve proposed in this utility model, viewed from below.

[0027] In the diagram: 1. Valve body; 101. Inlet; 102. Outlet; 103. Mounting hole; 104. Sealing groove; 105. Annular groove; 2. Fixing ring; 201. Placement groove; 3. First adjusting plate; 301. Limiting block; 4. Second adjusting plate; 401. Limiting groove; 5. Slide rod; 6. Spring; 7. Check plate; 8. Rubber pad; 9. Gasket; 10. Limiting bolt; 11. Limiting rod; 12. Limiting piece; 13. Fixing bolt. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] In one embodiment: Refer to Figure 1-4A check valve includes a valve body 1, which is cylindrical with an inlet 101 at the top center and an outlet 102 at the bottom center, connected by an internal channel. Four mounting holes 103 are symmetrically arranged on the outer wall of the valve body 1, with fixing bolts 13 inserted into each hole for connection to external pipelines. Annular grooves 105 are formed on the outer periphery of both the top and bottom of the valve body 1, allowing sealing gaskets to be embedded during installation to enhance the sealing effect between the valve body and the pipeline.

[0030] A fixing ring 2 is fixedly installed inside the valve body 1 near the outlet 102. The fixing ring 2 is connected to the valve body 1 by four fixing bolts 13. The fixing ring 2 has threaded holes corresponding to the mounting holes 103. The fixing bolts 13 pass through the mounting holes 103 and are screwed into the threaded holes to position the fixing ring 2. A placement groove 201 is opened inside the fixing ring 2, and the first adjusting plate 3 and the second adjusting plate 4 are stacked in the placement groove 201.

[0031] Both the first adjusting plate 3 and the second adjusting plate 4 are circular plate structures with multiple radially distributed through holes on their surfaces. Two symmetrically fixed limiting blocks 301 are fixed to the bottom of the first adjusting plate 3, and multiple limiting grooves 401 are formed on the top surface of the second adjusting plate 4. The limiting blocks 301 engage with the limiting grooves 401. By rotating the first adjusting plate 3, the limiting blocks 301 are engaged with different limiting grooves 401, adjusting the degree of misalignment of the through holes on the two plates, thereby changing the fluid flow area and achieving flow regulation. When the liquid flows through, the radial distribution of the through holes guides the fluid to pass through evenly, reducing resistance.

[0032] Both the first adjusting plate 3 and the second adjusting plate 4 have sliding holes at their centers. A sliding rod 5 passes through both sliding holes and is slidably mounted. The bottom of the sliding rod 5 is fixed to the fixing ring 2, and the top is successively fitted with a check plate 7, a rubber pad 8, and a gasket 9. The end is screwed with a limiting bolt 10. A spring 6 is fitted on the sliding rod 5, with its two ends abutting against the top surface of the first adjusting plate 3 and the bottom surface of the check plate 7, respectively.

[0033] When liquid flows in from the inlet 101, the fluid pressure pushes the check plate 7 upward, compressing the spring 6. The liquid then flows through the gap between the check plate 7 and the first adjusting plate 3, and through the through hole to the outlet 102. When the fluid flows backward, the spring 6 pushes the check plate 7 upward, causing the rubber gasket 8 to embed into the sealing groove 104 on the inner wall of the top of the valve body 1, forming a double sealing structure to prevent backflow of the medium. The cooperation between the rubber gasket 8 and the sealing groove 104 effectively prevents leakage and improves sealing reliability.

[0034] This application can be used in the field of check valve technology, or in other fields applicable to this application.

[0035] In another embodiment: Reference Figure 2-4An improvement upon Embodiment 1: A low-resistance wafer check valve, applied in the field of check valve technology, features two symmetrically fixed limiting plates 12 on the inner wall of the valve body 1. The bottom of each limiting plate 12 abuts against the top surface of the first adjusting plate 3, providing support for the adjusting assembly. Two symmetrically fixed limiting rods 11 are fixed to the outer wall of the check plate 7. A sliding groove is formed at the end of each limiting rod 11 away from the check plate 7, and the groove slides in cooperation with the limiting plate 12. When the check plate 7 moves up and down, the limiting rod 11 slides along the limiting plate 12, ensuring the stability of the check plate 7's movement trajectory and preventing deviation that could lead to sealing failure.

[0036] When maintenance is required, unscrew the fixing bolt 13 to remove the fixing ring 2 along with the adjusting assembly and check assembly from the valve body 1. This allows for easy replacement of worn components such as the spring 6 and rubber pad 8, or cleaning of impurities from the through-hole. This structural design simplifies the disassembly process, shortens maintenance time, and reduces maintenance costs.

[0037] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-resistance clamping check valve, comprising a valve body (1) provided with a liquid inlet (101) and a liquid outlet (102), characterized in that, A fixing ring (2) is provided at the liquid outlet (102), and an adjustment component is provided on the fixing ring (2). The adjustment component includes a first adjustment plate (3) and a second adjustment plate (4). Both the first adjustment plate (3) and the second adjustment plate (4) are provided with multiple through holes. The first adjustment plate (3) and the second adjustment plate (4) can move relative to each other to change the degree of overlap of the through holes, thereby adjusting the fluid passage area. The fixed ring (2) is also provided with a check assembly, which includes a slide rod (5), a spring (6) and a check plate (7). The slide rod (5) is slidably connected in the sliding holes opened in the first adjusting plate (3) and the second adjusting plate (4). The spring (6) is sleeved on the slide rod (5). The two ends of the spring (6) abut against the top of the first adjusting plate (3) and the bottom of the check plate (7) respectively. The check plate (7) is sleeved on the slide rod (5) to seal the liquid inlet (101). The valve body (1) is provided with a limiting component, which includes a limiting rod (11) and a limiting plate (12). The limiting rod (11) is located on the check plate (7), and the limiting plate (12) is located on the inner wall of the valve body (1). The limiting rod (11) and the limiting plate (12) are slidably connected. When fluid flows in from the inlet (101), the fluid pressure pushes the check plate (7) to slide upward against the elastic force of the spring (6), and the fluid flows out through the through hole. When the fluid stops or flows backward, the spring (6) pushes the check plate (7) to move downward to seal the inlet (101).

2. The low resistance clamping check valve of claim 1, wherein, The adjustment assembly also includes two limiting blocks (301) and multiple limiting grooves (401). The two limiting blocks (301) are symmetrically fixed at the bottom of the first adjustment plate (3). The limiting grooves (401) are opened on the second adjustment plate (4). The two limiting blocks (301) are engaged with the corresponding limiting grooves (401). By engaging the limiting blocks (301) with the limiting grooves (401), the relative positions of the first adjustment plate (3) and the second adjustment plate (4) are fixed to prevent movement caused by liquid impact.

3. The low resistance clamping check valve of claim 2, wherein, The outer wall of the valve body (1) is symmetrically provided with four mounting holes (103), and each of the four mounting holes (103) is provided with a fixing bolt (13). The fixing ring (2) is provided with a threaded hole corresponding to the fixing bolt (13). The four fixing bolts (13) are threadedly connected to the threaded holes respectively. The inside of the fixing ring (2) is provided with a placement groove (201). The first adjusting plate (3) and the second adjusting plate (4) are both set in the placement groove (201). The adjusting assembly and the check assembly can be taken out as a whole by removing the fixing bolts (13).

4. The low resistance clamping check valve of claim 1, wherein, The check valve assembly also includes a rubber pad (8), a gasket (9), and a limiting bolt (10). The rubber pad (8) is fitted on the slide rod (5) and located above the check plate (7). The gasket (9) is fitted on the slide rod (5) and located above the rubber pad (8). The limiting bolt (10) is threaded to the top of the slide rod (5) and is used to fix the check plate (7), the rubber pad (8), and the gasket (9). The check valve assembly can be removed by disassembling the limiting bolt (10).

5. The low resistance clamping check valve of claim 4, wherein, The valve body (1) has a sealing groove (104) on its top inner wall. The rubber pad (8) is embedded in the sealing groove (104). When the check plate (7) moves downward, the rubber pad (8) and the sealing groove (104) form a double seal.

6. The low resistance clamping check valve of claim 1, wherein, Each of the two limiting rods (11) has a sliding groove at one end that is far apart from each other. The two sliding grooves are slidably connected to the corresponding limiting piece (12) to ensure that the anti-return plate (7) moves stably and to prevent swaying or jamming.

7. The low-resistance wafer check valve according to claim 1, characterized in that, The valve body (1) has annular grooves (105) at both the top and bottom for mounting and fixing the valve body (1).

8. The low-resistance wafer check valve according to claim 1, characterized in that, The bottoms of both limiting plates (12) abut against the top of the first adjusting plate (3), providing support to stabilize the adjusting assembly.

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