Combined reducing check valve
The design of the buffer chamber and axial flow chamber of the combined reducing check valve solves the problem of the valve disc hitting the guide cover when opening the valve, achieves smooth opening and noise reduction, and extends the service life of the valve.
Patent Information
- Application Number
- CN202423030929.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-12-10
AI Technical Summary
When the existing reducing check valve is opened, the valve disc is easily opened too much or hits the guide cover due to the high pressure before the valve, which generates noise and damages the valve disc, shortening its service life.
A combined reducing check valve is designed, which includes a buffer chamber and an axial flow chamber. The first and second check mechanisms are linked together, and the buffer chamber is used to buffer the high-pressure medium to ensure that the valve disc opens smoothly and avoids hitting the guide cover.
Effectively reduce valve opening noise, protect valve disc, extend valve service life, and ensure normal passage of media.
Smart Images
Figure CN223360006U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a combined different-diameter check valve. Background Art
[0002] Reducing check valves are suitable for situations where the diameter of the pump outlet is inconsistent with that of the connected pipe. They can be installed directly without a reducing pipe joint. For reducing check valves with a small-diameter channel flange at the inlet and a large-diameter channel flange at the outlet, due to the different diameters before and after the valve, the pressure before the valve is usually larger when the valve is opened. The impact of high-pressure medium on the valve disc can easily cause the valve disc to open too much or the valve disc to hit the guide cover inside the valve body, causing huge noise and even damage the valve disc, affecting the service life of the valve. Summary of the Invention
[0003] In view of the deficiencies in the prior art, the utility model provides a combined reducing check valve.
[0004] The technical solutions provided by this utility model are:
[0005] A combined reducing check valve comprises a valve body, wherein the valve body is provided with an inlet cavity, a buffer cavity and an axial flow cavity along the medium conveying direction, the buffer cavity is provided with a first valve disc, a first valve shaft and a first spring, the first valve shaft is fixedly connected to the first valve disc, the first spring is sleeved on the first valve shaft to provide elastic force for the first valve disc, the axial flow cavity is provided with a second valve disc, a second valve shaft, a second spring and a flow guide cover, the second valve shaft is passed through the flow guide cover and is fixedly connected to the second valve disc, the second spring is sleeved on the second valve shaft to provide elastic force for the second valve disc, a connecting guide sleeve is provided between the second valve disc and the first valve shaft, one end of the connecting guide sleeve is fixed to the second valve disc, and the other end is provided with a guide groove, and the first valve shaft can be slidably provided in the guide groove.
[0006] The valve body is gourd-shaped, the volume of the inlet cavity is smaller than that of the buffer cavity, the volume of the buffer cavity is smaller than that of the axial flow cavity, and the diameter of the first valve flap is smaller than that of the second valve flap.
[0007] The inlet cavity is provided with a first guide sleeve, and one end of the first valve shaft extends to the inlet cavity and passes through the first guide sleeve.
[0008] The buffer cavity is provided with a second guide sleeve, and the connecting guide sleeve is passed through the second guide sleeve.
[0009] The distance that the connecting guide sleeve can slide relative to the second guide sleeve is greater than the distance that the second valve flap moves to abut against the deflector cover.
[0010] The deflector is a semicircular hollow structure, a surface away from the second valve flap is a conical surface, and a surface where the second valve flap and the deflector are close to each other is a flat surface.
[0011] A connecting plate is provided on the outer wall of the deflector cover, and a thread is provided on the end of the connecting plate. The deflector cover is detachably connected to the valve body through the connecting plate.
[0012] The diameter of the second valve flap is greater than the maximum inner diameter of the air guide cover.
[0013] A third guide sleeve is provided in the deflector cover, and the second valve shaft passes through the third guide sleeve.
[0014] The beneficial effects of the present invention are as follows: the present invention provides a buffer chamber and a first check mechanism in the buffer chamber, which can buffer the high-pressure medium in front of the valve when the valve is opened. The first check mechanism is linked to the second check axial flow mechanism in the axial flow chamber by connecting the guide sleeve. The high-pressure medium pushes the first valve disc to move right, which will drive the second valve disc to move right. After buffering, the second valve disc opens smoothly and will not hit the guide cover in the valve body, thereby effectively reducing the valve opening noise, protecting the valve disc, and extending the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model. DETAILED DESCRIPTION
[0016] The embodiments of the present invention will be further described below with reference to the accompanying drawings.
[0017] like Figure 1 As shown, a combined reducing check valve comprises a valve body 1 , wherein the valve body 1 is provided with an inlet cavity 11 , a buffer cavity 12 , and an axial flow cavity 13 along the medium conveying direction.
[0018] The inlet cavity 11 is provided with a first guide sleeve 4, and the buffer cavity 12 is provided with a first valve disc 2, a first valve shaft 3, and a first spring 5. The first valve shaft 3 is fixedly connected to the first valve disc 2, and one end thereof extends to the inlet cavity and is passed through the first guide sleeve 4. The first spring 5 is sleeved on the first valve shaft 3 to provide elastic force for the first valve disc 2. The first valve disc 2, the first valve shaft 3, and the first spring 5 constitute a first check mechanism, which can buffer the high-pressure medium in front of the valve when the valve is opened, and at the same time prevent the medium backwash from affecting the upstream pipeline.
[0019] The axial flow chamber 13 is provided with a second valve disc 8, a second valve shaft 14, a second spring 15, and a guide cover 9. A third guide sleeve 16 is provided in the guide cover 9. The second valve shaft 14 is passed through the third guide sleeve 16 and is fixedly connected to the second valve disc 8. The second spring 15 is sleeved on the second valve shaft to provide elastic force for the second valve disc. The second valve disc 8, the second valve shaft 14, and the second spring 15 constitute a second check mechanism. A connecting guide sleeve 7 is provided between the second valve disc 8 and the first valve shaft 3. One end of the connecting guide sleeve 7 is fixed to the second valve disc 8, and the other end is provided with a guide groove. The first valve shaft 3 can be slidably arranged in the guide groove.
[0020] When the valve is opened, the high-pressure medium enters the inlet cavity 11 from the upstream pipeline and impacts the first valve disc 2, pushing the first valve disc 2 to move right. The first guide sleeve 4 guides the first valve shaft 3 to prevent it from deflecting. The first spring 5 is squeezed to generate elastic force to offset the impact force of the medium, thereby buffering the medium. After entering the buffer cavity, the medium continues to impact the second valve disc 8, thereby opening the valve. When the pressure of the high-pressure medium is still large enough after buffering, the continuous rightward movement of the first valve shaft 3 drives the connecting guide sleeve 7 to move right, driving the second valve disc 8 to open. The second spring 8 is squeezed to generate elastic force and also participates in offsetting the impact force of the medium. Since the second valve disc 8 is already open, the medium will continue to enter the axial flow cavity after entering the buffer cavity 12, reducing the impact force of the medium on the second valve disc 8, so that the second valve disc 8 opens smoothly and will not hit the guide cover in the valve body. After being guided by the guide cover, the medium flows to the downstream pipeline, effectively protecting the valve disc and extending the service life of the valve.
[0021] In this embodiment, the valve body 1 is gourd-shaped, the volume of the inlet cavity 11 is smaller than the volume of the buffer cavity 12, the volume of the buffer cavity 12 is smaller than the volume of the axial flow cavity 13, the diameter of the first valve flap 2 is smaller than the diameter of the second valve flap 8, the volume of the valve body chamber corresponding to the medium conveying direction gradually increases, and the corresponding valve flap 8 increases, and the high-pressure medium when the valve is opened is gradually reduced in pressure to avoid the medium from being unable to flush the second valve flap 8 after being buffered in the buffer cavity, thereby ensuring the normal passage of the medium and effectively reducing the valve opening noise.
[0022] In this embodiment, the buffer chamber 12 is provided with a second guide sleeve 6, and the connecting guide sleeve 7 is passed through the second guide sleeve 6. The second guide sleeve 6 guides the connecting guide sleeve 7 to prevent it from shifting when it moves laterally. The distance that the connecting guide sleeve 7 can slide relative to the second guide sleeve 6 is greater than the distance that the second valve disc 8 moves to abut against the guide cover 9, preventing the connecting guide sleeve 7 from separating from the second guide sleeve 6 when the second valve disc 8 moves to the right, thereby ensuring the reliability of the valve opening and closing.
[0023] In this embodiment, the deflector 9 is a semicircular hollow structure, and its side away from the second valve flap 8 is a conical surface. A stable medium channel is formed between the outer contour of the deflector 9 and the valve body. The side where the second valve flap 8 and the deflector 9 are close to each other is a plane. The diameter of the second valve flap 8 is larger than the maximum inner diameter of the deflector 8. When the second valve flap 8 is opened, the second valve flap 8 and the deflector 9 are closely attached to each other, which is not easy to generate vibration and noise, and the medium can be stably transmitted along the above-mentioned medium channel. When the medium recoils, the hollow structure can provide space for the medium to swirl, avoiding severe recoil noise.
[0024] In this embodiment, a connecting plate 10 is provided on the outer wall of the air deflector 8 , and a thread is provided on the end of the connecting plate 10 . The air deflector 8 is detachably connected to the valve body 1 through the connecting plate 10 , which facilitates maintenance and replacement of the air deflector 8 .
[0025] The embodiments should not be regarded as limiting the present invention, and any non-inventive improvements based on the spirit of the present invention should be regarded as falling within the protection scope of the present invention.
Claims
1. A combined reducing check valve, characterized by: The control cabinet of the present invention is a valve body which is provided with an inlet cavity, a buffer cavity and an axial flow cavity along the medium conveying direction; the buffer cavity is provided with a first valve flap, a first valve shaft and a first spring; the first valve shaft is fixedly connected to the first valve flap; the first spring is sleeved on the first valve shaft to provide elastic force for the first valve flap; the axial flow cavity is provided with a second valve flap, a second valve shaft, a second spring and a flow guide cover; the second valve shaft is passed through the flow guide cover and fixedly connected to the second valve flap; the second spring is sleeved on the second valve shaft to provide elastic force for the second valve flap; a connecting guide sleeve is provided between the second valve flap and the first valve shaft; one end of the connecting guide sleeve is fixed to the second valve flap, and the other end is provided with a guide groove; the first valve shaft is slidably provided in the guide groove.
2. A combined reducing check valve according to claim 1, characterized in that: The valve body is gourd-shaped, the volume of the inlet cavity is smaller than that of the buffer cavity, the volume of the buffer cavity is smaller than that of the axial flow cavity, and the diameter of the first valve flap is smaller than that of the second valve flap.
3. A combined reducing check valve according to claim 1, characterized in that: The inlet cavity is provided with a first guide sleeve, and one end of the first valve shaft extends to the inlet cavity and passes through the first guide sleeve.
4. A combined reducing check valve according to claim 1, characterized in that: The buffer cavity is provided with a second guide sleeve, and the connecting guide sleeve is passed through the second guide sleeve.
5. A combined reducing check valve according to claim 4, characterized in that: The distance that the connecting guide sleeve can slide relative to the second guide sleeve is greater than the distance that the second valve flap moves to abut against the deflector cover.
6. The combined reducing check valve according to claim 1, characterized in that: The deflector is a semicircular hollow structure, a surface away from the second valve flap is a conical surface, and a surface where the second valve flap and the deflector are close to each other is a flat surface.
7. The combined reducing check valve according to claim 1, characterized in that: A connecting plate is provided on the outer wall of the deflector cover, and a thread is provided on the end of the connecting plate. The deflector cover is detachably connected to the valve body through the connecting plate.
8. The combined reducing check valve according to claim 1, characterized in that: The diameter of the second valve flap is greater than the maximum inner diameter of the air guide cover.
9. The combined reducing check valve according to claim 1, characterized in that: A third guide sleeve is provided in the deflector cover, and the second valve shaft passes through the third guide sleeve.