Shock-resistant pressure-reducing protective valve
By designing an impact pressure-reducing protection valve including buffering and diversion device, drainage device, buffering device and throttling device, the multi-stage throttling pressure reducing valve on the high-pressure outlet pipe has a large structural size and many external sealing parts. The problem of high leakage risk has realized the functions of medium buffering and automatic buffering throttling and step-down reduction.
Patent Information
- Application Number
- CN202420731367.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-10
AI Technical Summary
The multi-stage throttling pressure reducing valves on the existing high-pressure outlet pipes have problems such as large structural size, many external sealing parts, and high leakage risk, making it difficult to meet the valve's automatic buffering, throttling and pressure reduction function.
An anti-impact pressure-reducing protection valve is designed, including a valve body, valve cover, buffering and diversion device, drainage device, buffering device and throttling device, and the medium buffering and pressure-reducing is achieved through buffering and diversion device, buffering spring and buffering disc spring. The throttling device is located outside the valve body opening end to realize the medium passage and throttling and reducing pressure.
It realizes the function of medium buffering and pressure reduction to prevent internal parts and pipelines of the valve from being damaged by impact, solves the problems of large structural size, many external sealing parts, and high leakage risk, and at the same time, it realizes automatic valve Buffering throttling and bucking function.
Smart Images
Figure CN222437128U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of high-pressure valves, and in particular relates to an anti-impact pressure-reducing protection valve. Background Art
[0002] The conventional multi-stage throttling pressure reducing valve on the high-pressure outlet pipeline of the nuclear power system adopts a multi-layer throttling sleeve structure, and at the same time, there are many external sealing parts, which has a high risk of leakage and a large structural size. Therefore, a simple structure with few external sealing parts and compact dimensions is required, and the valve is required to automatically buffer, throttle and reduce pressure. Utility Model Content
[0003] The utility model aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides an impact-resistant pressure-reducing protection valve; the utility model can solve the problems of large structural dimensions, more external sealing parts, and higher leakage risks of small-caliber multi-stage throttling pressure reducing valves, while realizing the function of automatic buffering throttling and pressure reduction of the valve.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions.
[0005] The utility model provides an impact-resistant pressure-reducing protection valve, comprising a valve body and a valve cover, wherein medium through holes are arranged at the ends of the valve body and the valve cover, and the valve body and the valve cover further comprise a buffer guide device, a drainage device, a buffer device, and a throttling device, wherein the valve body is connected to the valve cover, the buffer guide device and the drainage device are detachably connected to each other and are located in the valve body at the same time, the throttling device is located outside the opening end of the valve body and inside the valve cover, the outer diameter of the throttling device is larger than the inner diameter of the valve body, and the buffer device is respectively arranged between the drainage device and the throttling device, and between the throttling device and the inner end wall of the valve cover, so as to respectively limit the movement range of the drainage device and the throttling device.
[0006] Furthermore, one end of the buffering and guiding device is an arc surface, a medium passage is arranged in the middle of the other end, and a plurality of buffering through holes extending from the side edge into the medium passage are arranged on the side.
[0007] Furthermore, the buffer and flow guiding device is made of rubber.
[0008] Furthermore, the drainage device is provided with a plurality of primary drainage holes along the circumferential direction, and a secondary drainage hole correspondingly connected to the medium passage is provided in the middle.
[0009] Furthermore, the first-level drainage holes are all inclined holes, and the first-level drainage holes are evenly distributed on the drainage device.
[0010] Furthermore, a middle through hole is provided in the middle of the throttling device, and a plurality of small through holes are evenly distributed between the middle through hole and the edge of the throttling device.
[0011] Furthermore, the buffer device includes a buffer spring and a buffer disc spring, the buffer spring is arranged between the drainage device and the throttling device, and the buffer disc spring is arranged between the throttling device and the inner wall of the valve cover.
[0012] The beneficial effects of the utility model.
[0013] The utility model is installed on the high-pressure outlet pipeline of the nuclear power system to prevent the instantaneous pressure of the medium from being too large, causing the internal parts of the valve and the pipeline to be damaged by the impact. The function of medium buffering and pressure reduction is realized, and the internal parts are driven by the buffering guide device, the buffering spring and the buffering disc spring to realize linkage and medium pressure reduction. The buffering guide device, the drainage device and the throttling device realize the medium passage and throttling pressure reduction. While solving the problem that the structure size of the small-diameter multi-stage throttling pressure reducing valve is too large, there are many external sealing parts and the leakage risk is high, the function of automatic buffering, throttling and pressure reduction of the valve is realized. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.
[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.
[0016] Figure 2 It is a schematic cross-sectional structure diagram of the buffer and flow guiding device of the utility model.
[0017] Figure 3 This utility model Figure 2 AA section diagram of .
[0018] Markings in the figure: 1 is the valve body, 2 is the valve cover, 3 is the medium through hole, 4 is the buffer guide device, 5 is the drainage device, 6 is the throttling device, 7 is the arc surface, 8 is the medium passage, 9 is the buffer through hole, 10 is the primary drainage hole, 11 is the secondary drainage hole, 12 is the middle through hole, 13 is the small through hole, 14 is the buffer spring, and 15 is the buffer disc spring. DETAILED DESCRIPTION
[0019] As shown in the accompanying drawings, this embodiment provides an impact-resistant pressure reduction protection valve, including a valve body 1 and a valve cover 2. Medium through holes 3 are arranged at the ends of the valve body 1 and the valve cover 2. It also includes a buffer guide device 4, a drainage device 5, a buffer device, and a throttling device 6.
[0020] The valve body 1 is connected to the valve cover 2, and the buffer guide device 4 and the flow guide device 5 are detachably connected to each other and are simultaneously located in the valve body 1. One end of the buffer guide device 4 is an arc surface 7, which can buffer the force directly applied by the medium. A medium passage 8 is arranged in the middle of the other end, and a plurality of buffer through holes 9 extending from the side edge to the medium passage 8 are arranged on the side to achieve medium decompression.
[0021] The displacement of the inlet end of the flow guide device 5 is limited by the valve body 1, and the movement area can avoid the collision between the buffer flow guide device 4 and the inlet end of the valve body 1. The flow guide device 5 is provided with a plurality of primary flow guide holes 10 along the circumference, and a secondary flow guide hole 11 corresponding to the medium passage 8 is provided in the middle. The primary flow guide holes 10 are all inclined holes, which can reduce the impact of the medium force directly on the throttling device 6, and the primary flow guide holes 10 are evenly distributed on the flow guide device 5.
[0022] The throttling device 6 is located outside the opening end of the valve body 1 and inside the valve cover 2. The outer diameter of the throttling device 6 is larger than the inner diameter of the valve body 1, and the displacement of the inlet end of the throttling device 6 is limited by the right end face of the valve body 1. A middle through hole 12 is provided in the middle of the throttling device 6, and a plurality of small through holes 13 are evenly distributed between the middle through hole 12 and the edge of the throttling device 6, and each aperture controls the pressure at the outlet end.
[0023] The buffer devices are respectively arranged between the flow guiding device 5 and the throttling device 6, and between the throttling device 6 and the inner end wall of the valve cover 2, so as to limit the movement range of the flow guiding device 5 and the throttling device 6 respectively.
[0024] The buffer device includes a buffer spring 14 and a buffer disc spring 15. The buffer spring 14 is arranged between the drainage device 5 and the throttling device 6, and the buffer disc spring 15 is arranged between the throttling device 6 and the inner wall of the valve cover 2. The drainage device 5 is limited in its movement range by the buffer spring 14 and the buffer disc spring 15, and the throttling device 6 is limited in its movement range by the buffer disc spring 15.
[0025] The internal parts linkage and pressure regulation are realized by the buffer guide device 4, the buffer spring 14 and the buffer disc spring 15. The buffer guide device 4, the drainage device 5 and the throttling device 6 form a medium passage 8 and realize the function of automatic buffering, throttling and pressure reduction of the valve.
[0026] Working principle: The medium enters from the left side of the valve body 1. When the pressure reaches 50-60MPa instantaneously, the medium directly acts on the arc surface 7 of the buffer guide device 4 and flows along the arc surface 7. A part of the medium directly flows to the multiple uniformly distributed primary drainage holes 10 on the drainage device 5; the other part flows along the buffer through hole 9 on the side of the buffer guide device 4 to the secondary drainage hole 11 of the drainage device 5. The medium pressure is controlled by the aperture size and the buffer spring 14 to achieve primary pressure regulation. The medium flowing out of the buffer guide device 4 directly acts on the middle through hole 12 of the throttling device 6, and part of the medium will pass through the multiple uniformly distributed small through holes 13 on the throttling device 6. Under the action of the buffer disc spring 15, secondary pressure regulation is achieved.
[0027] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
Claims
1. An anti-shock pressure reduction protection valve, comprising a valve body (1) and a valve cover (2), wherein the ends of the valve body (1) and the valve cover (2) are both provided with medium through holes (3), characterized in that: The valve body (1) further comprises a buffer flow guide device (4), a flow guide device (5), a buffer device, and a throttling device (6); the valve body (1) is connected to the valve cover (2); the buffer flow guide device (4) and the flow guide device (5) are detachably connected to each other and are simultaneously located in the valve body (1); the throttling device (6) is located outside the opening end of the valve body (1) and inside the valve cover (2); the outer diameter of the throttling device (6) is larger than the inner diameter of the valve body (1); the buffer device is respectively arranged between the flow guide device (5) and the throttling device (6), and between the throttling device (6) and the inner end wall of the valve cover (2), so as to respectively limit the movement range of the flow guide device (5) and the throttling device (6).
2. The anti-shock pressure reduction protection valve according to claim 1, characterized in that: One end of the buffering and flow guiding device (4) is an arc surface (7), a medium passage (8) is provided in the middle of the other end, and a plurality of buffering through holes (9) are provided on the side, extending from the side edge into the medium passage (8).
3. The anti-shock pressure reduction protection valve according to claim 2, characterized in that: The buffer and flow guiding device (4) is made of rubber.
4. The anti-shock pressure reduction protection valve according to claim 2, characterized in that: The drainage device (5) is provided with a plurality of primary drainage holes (10) along the circumferential direction, and a secondary drainage hole (11) is provided in the middle thereof and is correspondingly connected to the medium passage (8).
5. The anti-shock pressure reduction protection valve according to claim 4, characterized in that: The first-level drainage holes (10) are all inclined holes, and the first-level drainage holes (10) are evenly distributed on the drainage device (5).
6. The anti-shock pressure reduction protection valve according to claim 1, characterized in that: A middle through hole (12) is provided in the middle of the throttling device (6), and a plurality of small through holes (13) are evenly distributed between the middle through hole (12) and the edge of the throttling device (6).
7. The anti-shock pressure reduction protection valve according to claim 1, characterized in that: The buffer device comprises a buffer spring (14) and a buffer disc spring (15); the buffer spring (14) is arranged between the flow guide device (5) and the throttling device (6); and the buffer disc spring (15) is arranged between the throttling device (6) and the inner wall of the valve cover (2).