Low impact low pressure open axial flow check valve
By introducing a front and rear guide structure and elastic elements into the axial flow check valve, the problems of friction and impact force when the valve is closed are solved, enabling low-pressure opening and reducing water hammer impact, thereby improving the service life of the valve.
Patent Information
- Application Number
- CN202521912124.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-05
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-05
AI Technical Summary
In the operation of existing axial flow check valves, the valve disc and the cantilever of the guide part generate additional friction when the valve is closed, which increases the opening pressure and causes an impact on the valve seat when the valve is closed, affecting the service life.
A low-impact, low-pressure opening axial flow check valve is designed, employing a front and rear guide fit structure and elastic elements. By setting two guide fit structures and two elastic elements before and after the valve disc, the friction and closing speed when the valve is closed are reduced, and the impact force between the valve disc and the guide parts is reduced.
It effectively reduces valve opening pressure, reduces friction and impact when the valve is closed, and extends the service life of the flow guide.
Smart Images
Figure CN224680203U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve technology, specifically to a low-impact, low-pressure opening axial flow check valve. Background Technology
[0002] During use, existing axial flow check valves experience additional friction between the valve disc and the cantilever of the guide section when the valve is closed, and the valve opening pressure increases due to the friction that needs to be overcome when the valve is open. Furthermore, when the valve is closed, the valve disc impacts the valve seat, and when the valve is fully open, the water hammer impact caused by the rapid opening and closing of the valve disc can affect the service life of the flow guide. Summary of the Invention
[0003] To address the technical deficiencies of existing technologies, this invention provides a low-impact, low-pressure opening axial flow check valve.
[0004] The technical solution adopted by this utility model is: a low-impact, low-pressure opening axial flow check valve, including a valve body, a guide shaft and a guide sleeve provided in the valve body, a valve disc provided on the guide shaft, the valve disc being fixedly connected to the guide shaft, the guide shaft and the valve disc being movably engaged with the valve body, the valve disc including a closed position that seals with the inner wall of the valve body and an open position that moves with the guide shaft in the direction of the guide sleeve, a guide seat provided in the valve body, one end of the guide shaft being guided and engaged with the guide seat to form a front guide engagement structure, a fixing ring being provided inside the guide sleeve, a positioning ring being provided inside the fixing ring, and the other end of the guide shaft being guided and engaged with the positioning ring to form a rear guide engagement structure.
[0005] A front spring and a rear spring are respectively provided on the guide shafts on both sides of the valve disc. The front spring is located between the valve disc and the guide seat, and the rear spring is located between the valve disc and the fixing ring.
[0006] Both the guide seat and the positioning ring are provided with through holes, and the guide shaft slides into the through holes on the guide seat and the positioning ring.
[0007] The fixed ring has an installation groove, and the positioning ring is installed in the installation groove and connected to the fixed ring.
[0008] The front spring is sleeved on the guide shaft near the guide seat, and the rear spring is sleeved on the guide shaft near the fixing ring.
[0009] The valve body has a valve seat on its inner wall, and the valve disc and the valve seat are sealed together.
[0010] The guide sleeve is provided with a flow guide plug, and the flow guide plug is provided with a circular hole for the medium to flow through.
[0011] The beneficial effects of this utility model are as follows: This utility model provides a low-impact, low-pressure opening axial flow check valve, including a valve body, a guide shaft and a guide sleeve inside the valve body, a valve disc on the guide shaft, a fixed connection between the valve disc and the guide shaft, and a movable fit between the guide shaft, the valve disc and the valve body. The valve disc includes a closed position that seals against the inner wall of the valve body and an open position that moves with the guide shaft in the direction of the guide sleeve. A guide seat is provided in the valve body, and one end of the guide shaft and the guide seat form a front guide fit structure. A fixing ring is also provided inside the guide sleeve, and a positioning ring is also provided inside the fixing ring. The other end of the guide shaft and the positioning ring form a rear guide fit structure. This utility model, by providing two guide fit structures before and after the valve disc, avoids the additional friction force generated by the cantilever of the valve disc and the guide part when the valve is closed. The friction force that needs to be overcome when the valve is opened is reduced, and the valve opening pressure can be reduced. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Wherein 1-valve body, 2-guide shaft, 3-guide sleeve, 4-valve disc, 5-guide seat, 6-fixed ring, 7-valve seat, 21-front spring, 22-rear spring, 51-front guide mating structure, 61-positioning ring, 62-rear guide mating structure. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] A low-impact, low-pressure opening axial flow check valve includes a valve body 1. The valve body 1 contains a guide shaft 2 and a guide sleeve 3. A valve disc 4 is mounted on the guide shaft 2 and is fixedly connected to the guide shaft 2. The guide shaft 2 and valve disc 4 are movably fitted with the valve body 1. The valve disc 4 includes a closed position that seals against the inner wall of the valve body 1 and an open position that moves with the guide shaft 2 towards the guide sleeve 3. The valve body 1 has a guide seat 5. One end of the guide shaft 2 is guided and fitted with the guide seat 5 to form a front guide fit structure 51. The guide sleeve 3 also contains a fixing ring 6, and the fixing ring 6 contains a positioning ring 61. The other end of the guide shaft 2 is guided and fitted with the positioning ring 61 to form a rear guide fit structure 62. This invention, by providing two guide fit structures before and after the valve disc, avoids the additional frictional force generated by the cantilever of the valve disc and the guide part when the valve is closed. The frictional force that needs to be overcome when the valve is opened is reduced, and the valve opening pressure can be lowered. A front spring 21 and a rear spring 22 are respectively installed on the guide shafts 2 on both sides of the valve disc 4. The front spring 21 is located between the valve disc 4 and the guide seat 5, and the rear spring 22 is located between the valve disc 4 and the fixing ring 6. The front spring 21 is sleeved on the guide shaft 2 near the guide seat 5, and the rear spring 22 is sleeved on the guide shaft 2 near the fixing ring 6. By providing two elastic elements before and after the valve disc, and designing the elastic elements to exert the same force when the valve is fully closed, the impact force generated by the elastic element behind the valve disc is reduced when the valve is closed. Due to the action of the spring in front of the valve disc, the closing speed of the valve disc is slowed down, reducing the impact force when the valve disc closes. When the valve is opened, the compression of the elastic element behind the valve disc reduces the collision force between the valve disc and the guide shield when the valve is fully open, and reduces the water hammer impact force caused by the rapid opening and closing of the valve disc.
[0016] Both the guide seat 5 and the positioning ring 61 are provided with through holes, and the guide shaft 2 slides in conjunction with the through holes on the guide seat 5 and the positioning ring 61.
[0017] The fixing ring 6 has an installation groove, and the positioning ring 61 is installed in the installation groove and connected to the fixing ring 6.
[0018] The valve body 1 has a valve seat 7 on its inner wall, and the valve disc 4 is sealed to the valve seat 7.
[0019] The guide sleeve 3 is provided with a flow guide plug 8, and the flow guide plug 8 is provided with a circular hole for the medium to flow through.
[0020] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of patent protection of this patent.
[0021] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A low-impact, low-pressure opening axial flow check valve, comprising a valve body (1), characterized in that, The valve body (1) is provided with a guide shaft (2) and a guide sleeve (3). A valve disc (4) is provided on the guide shaft (2). The valve disc (4) is fixedly connected to the guide shaft (2). The guide shaft (2) and the valve disc (4) are movably engaged with the valve body (1). The valve disc (4) includes a closed position that seals with the inner wall of the valve body (1) and an open position that moves with the guide shaft (2) toward the guide sleeve (3). The valve body (1) is provided with a guide seat (5). One end of the guide shaft (2) and the guide seat (5) are guided to form a front guide engagement structure (51). The guide sleeve (3) is also provided with a fixing ring (6). The fixing ring (6) is also provided with a positioning ring (61). The other end of the guide shaft (2) and the positioning ring (61) are guided to form a rear guide engagement structure (62).
2. The low-impact, low-pressure opening axial flow check valve according to claim 1, characterized in that, A front spring (21) and a rear spring (22) are respectively provided on the guide shafts (2) on both sides of the valve disc (4). The front spring (21) is located between the valve disc (4) and the guide seat (5), and the rear spring (22) is located between the valve disc (4) and the fixing ring (6).
3. The low-impact, low-pressure opening axial flow check valve according to claim 1, characterized in that, Both the guide seat (5) and the positioning ring (61) are provided with through holes, and the guide shaft (2) slides in fit with the through holes on the guide seat (5) and the positioning ring (61).
4. The low-impact, low-pressure opening axial flow check valve according to claim 3, characterized in that, The fixing ring (6) is provided with an installation groove, and the positioning ring (61) is installed in the installation groove and connected to the fixing ring (6).
5. A low-impact, low-pressure opening axial flow check valve according to claim 2, characterized in that, The front spring (21) is sleeved on the guide shaft (2) near the guide seat (5), and the rear spring (22) is sleeved on the guide shaft (2) near the fixing ring (6).
6. The low-impact, low-pressure opening axial flow check valve according to claim 1, characterized in that, The valve body (1) is provided with a valve seat (7) on its inner wall, and the valve disc (4) and the valve seat (7) are sealed together.
7. A low-impact, low-pressure opening axial flow check valve according to claim 1, characterized in that, The guide sleeve (3) is provided with a flow guide plug (8), and the flow guide plug (8) is provided with a circular hole for the medium to flow through.