Decompression throttling device with drainage function
By designing a pressure-reducing throttling device with drainage function, using the structure of the outer sleeve and inner sleeve and the throttling pressure-reducing parts, the jet is formed to increase the flow rate and flow rate, which solves the problems of small flow capacity and large noise vibration of the existing devices, and achieves the effect of efficient flow under large pressure differentials.
Patent Information
- Application Number
- CN202421655751.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The existing fixed pressure reducing and throttling device has small flow capacity and cannot meet the requirements of large pressure differential pressure reduction and large flow capacity. At the same time, the fluid noise is high and the tube body vibration increases when the medium is flowing.
A pressure-reducing and throttling device with drainage function is designed, including an outer sleeve and an inner sleeve. The inner sleeve is arranged in the outer sleeve. The outlet end of the inner sleeve is fixedly connected to the inner wall of the outer sleeve. The inlet end is equipped with a throttling and pressure reducing member. A drainage cavity is formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve. A speed increase cavity and drainage hole are provided in the inner sleeve. A jet is formed through the pressure of the medium itself, which increases the flow rate and flow rate.
Without increasing the flow area and not affecting the pressure reduction effect, the flow rate of the medium is increased and the flow rate is increased, which solves the problems of large fluid noise and increased pipe vibration, and meets the requirements of large pressure differential pressure reduction and large flow capacity.
Smart Images
Figure CN222823941U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipeline decompression and throttling devices, in particular to a decompression and throttling device with a drainage function. Background Art
[0002] The pipeline pressure reducing and throttling device is a device used to control the flow rate and flow rate of fluid in a pipeline system. Its working principle is to adjust the flow rate and flow rate of the fluid by changing the cross-sectional area of the flow channel in the pipeline.
[0003] The existing fixed pressure reducing and throttling device is to directly set up a pressure reducing orifice plate in the pipeline, and one or more throttling holes are provided on the orifice plate. Although this design can reduce the flow cross-sectional area, increase the medium flow rate, reduce the pressure, and achieve a certain pressure reducing and throttling effect, the existing fixed pressure reducing and throttling device has a small flow capacity and cannot simultaneously meet the requirements of large pressure difference pressure reduction and large flow capacity. In addition, the existing fixed pressure reducing and throttling device has a large fluid noise when the medium flows, and the vibration of the pipe body will also increase. Therefore, it is urgently necessary to design a pressure reducing and throttling device with a drainage function to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a pressure reducing and throttling device with a drainage function, which solves the above-mentioned problem that the flow capacity is small and cannot meet the requirements of large pressure difference pressure reduction and large flow capacity at the same time, and the problem that the existing fixed pressure reducing and throttling device has large fluid noise when the medium flows and is prone to increased pipe body vibration.
[0005] In order to solve the above technical problems, the utility model provides a pressure reducing throttling device with a drainage function, which is installed between two adjacent main pipelines. The device includes an outer casing and an inner casing. The two sides of the outer casing are respectively connected to the two adjacent main pipelines. The inner casing is arranged in the outer casing. The outer wall of the outlet end of the inner casing is fixedly connected to the inner wall of the outlet end of the outer casing to prevent the medium from flowing out from there between. A throttling pressure reducing component is provided at the inlet end. A drainage cavity is formed between the outer wall of the inner casing and the inner wall of the outer casing. The drainage cavity is connected with the inner cavity at the inlet of the outer casing. An increasing cavity is provided in the inner casing. A drainage hole is opened on the side wall of the inner casing. The drainage cavity is connected with the increasing cavity through the drainage hole.
[0006] Furthermore, the speed increasing cavity is composed of a first cavity section and a second cavity section which are sequentially connected along the flow direction of the inner medium, the diameter of the first cavity section decreases sequentially along the flow direction of the inner medium, and the diameter of the second cavity section increases sequentially along the flow direction of the inner medium.
[0007] Furthermore, the outlet end of the drainage hole is located at the connection between the first cavity section and the second cavity section.
[0008] Furthermore, there are a plurality of drainage holes, which are arranged along the circumferential direction of the inner sleeve, each of which is located at the minimum diameter of the side wall of the inner sleeve, and the medium flow direction in each drainage hole is arranged at an acute angle to the medium flow direction in the inner sleeve.
[0009] Furthermore, the throttling and pressure reducing component is fixedly provided at the inlet of the inner casing, and the throttling and pressure reducing component includes a throttling orifice plate and throttling holes arranged at intervals on the throttling orifice plate, and the throttling holes are respectively connected to the inner cavity and the speed increasing cavity at the inlet of the outer casing, and a transition slope is provided on the end face of the throttling orifice plate close to the inlet of the outer casing.
[0010] Furthermore, the device also includes a flow equalizing member arranged at the outlet end of the inner sleeve.
[0011] Furthermore, the flow equalizing member is arranged at the outlet end of the inner sleeve through a plurality of connecting brackets, and a through groove for medium circulation is provided between two adjacent connecting brackets.
[0012] Furthermore, one end of the connecting bracket is fixedly connected to the flow equalizing member, and the other end is connected to the end of the outer sleeve.
[0013] Furthermore, the inlet section of the flow equalizer is arc-shaped, the outlet section is conical, and the flow equalizer is coaxially arranged with the main pipeline.
[0014] Furthermore, the inlet flow area of the drainage cavity is less than 10% of the total flow area of the throttling and pressure reducing member, and is greater than twice the total flow area of a plurality of the drainage holes.
[0015] Beneficial effects of the utility model: The utility model adopts the design of the two-layer structure of the inner sleeve and the outer sleeve, and uses the pressure of the medium itself to form a jet, thereby increasing the medium flow rate and the flow rate without increasing the flow area and affecting the pressure reduction effect; the diffusion structure and the flow equalizer of the second cavity section are added at the end of the device to further increase the flow rate and increase the flow capacity;
[0016] The structural design of the inner sleeve and the outer sleeve can divert the fluid, so that the main fluid enters the speed-increasing chamber from the throttling hole of the throttling orifice plate of the inner sleeve. The inner diameter of the inner sleeve decreases and then increases along the flow direction of the medium, which can achieve the effect achieved by the Laval nozzle. Therefore, the fluid flow rate increases, the flow capacity increases, and the flow resistance caused by the throttling orifice plate is compensated; the secondary fluid is guided to the drainage chamber by the outer contour of the inner sleeve. Because there is no pressure reduction, the medium pressure in the drainage chamber is higher than the medium pressure in the speed-increasing chamber. The medium in the drainage chamber is sprayed into the speed-increasing chamber through the drainage hole. Due to the drainage effect, the medium flow rate in the speed-increasing chamber is further increased, thereby achieving the purpose of improving the flow capacity under the same outer sleeve diameter;
[0017] The design of the transition slope of the inlet end face of the outer sleeve allows the fluid on the left side of the throttling and pressure reducing member of the outer sleeve to flow smoothly into the drainage cavity, thereby solving the problem of fluid pressure reduction caused by the right-angle design and effectively increasing the speed of the fluid entering the drainage cavity;
[0018] The design of the flow equalizer can eliminate the uneven flow rate caused by the injection of the drainage hole through the arc-shaped inlet section and the conical outlet section, and can also reduce the noise level and vibration frequency of the medium during flow. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solution of the present invention, 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 these drawings without paying creative work.
[0020] Figure 1 It is a cross-sectional view of a pressure reducing throttling device with drainage function installed between two main pipelines in an embodiment of the utility model;
[0021] Figure 2 This is a structural diagram of a pressure reducing and throttling device with drainage function in an embodiment of the utility model;
[0022] In the figure: 1-device, 2-main pipeline, 11-outer casing, 12-inner casing, 13-flow equalizing part, 14-drainage chamber, 16-speed increasing chamber, 17-flow equalizing chamber, 18-connecting bracket, 121-throttling pressure reducing part, 122-drainage hole, 131-inlet section, 132-outlet section, 181-through groove, 1211-throttling orifice plate, 1212-throttling hole, 1213-transition slope. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings of the utility model specification to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] The following will be combined with a specific embodiment of the utility model and the attached Figure 1-2 To explain in detail, a decompression and throttling device with drainage function is specifically disclosed. The device 1 is installed between two adjacent main pipelines 2. The device 1 includes an outer sleeve 11 and an inner sleeve 12. The two sides of the outer sleeve 11 are respectively connected to the two adjacent main pipelines 2. The inner sleeve 12 is arranged in the outer sleeve 11. The outer wall of the outlet end of the inner sleeve 12 is fixedly connected to the inner wall of the outlet end of the outer sleeve 11 to prevent the medium from flowing out from therebetween. A throttling and decompression component 121 is provided at the inlet. A drainage cavity 14 is formed between the outer wall of the inner sleeve 12 and the inner wall of the outer sleeve 11. The drainage cavity 14 is connected with the inner cavity at the inlet of the outer sleeve 11. A speed-increasing cavity 16 is provided in the inner sleeve 12. A drainage hole 122 is opened on the side wall of the inner sleeve 12. The drainage cavity 14 is connected with the speed-increasing cavity 16 through the drainage hole 122.
[0025] A flow equalizing chamber 17 is provided in the main pipeline 2 near the outlet side of the inner casing 12. The structural design of the inner casing 12 and the outer casing 11 can divert the fluid, so that the main fluid enters the speed increasing chamber 16 from the several throttling holes 1212 of the throttling orifice plate 1211 of the inner casing 12, and the secondary fluid is blocked by the outer contour of the inner casing 12 to the drainage chamber 14. Since there is no pressure reduction, the medium pressure in the drainage chamber 14 is higher than the medium pressure in the speed increasing chamber 16. The medium in the drainage chamber 14 is sprayed into the speed increasing chamber 16 through the drainage hole. Due to the drainage effect, the medium flow rate in the speed increasing chamber 16 is further increased, thereby achieving the purpose of improving the flow capacity under the same outer casing 11 pipe diameter.
[0026] The speed increasing cavity 16 is composed of a first cavity section and a second cavity section connected in sequence along the flow direction of the medium therein. The diameter of the first cavity section decreases in sequence along the flow direction of the medium therein, and the diameter of the second cavity section increases in sequence along the flow direction of the medium therein. The outlet end of the drainage hole 122 is located at the connection between the first cavity section and the second cavity section.
[0027] There are a plurality of drainage holes 122, which are arranged along the circumferential direction of the inner sleeve 12. In this embodiment, the number of drainage holes 122 is 4. Each drainage hole 122 is located at the minimum diameter of the side wall of the inner sleeve 12. The flow direction of the medium in each drainage hole 122 is arranged at an acute angle to the flow direction of the medium in the inner sleeve 12. Through the design of the inner and outer two-layer structure and the use of the medium's own pressure to form a jet, the medium flow rate is increased without increasing the flow area and without affecting the decompression effect, and the flow rate is increased; the diffusion structure of the second cavity section and the flow equalizer 13 are added at the end of the device 1 to further increase the flow rate and increase the flow capacity.
[0028] A throttling and decompression component 121 is fixedly provided at the feed end of the inner sleeve 12, and the throttling and decompression component 121 includes a throttling orifice plate 1211 and a plurality of throttling holes 1212 spaced apart on the throttling orifice plate 1211. The speed increasing chamber 16 is connected with the inner cavity at the inlet of the outer sleeve 11 through the plurality of throttling holes 1212 on the throttling orifice plate 1211. A transition slope 1213 is provided on the end surface of the throttling orifice plate 1211 close to the inlet of the outer sleeve 11. The inlet flow area of the drainage chamber 14 is less than 10% of the total flow area on the throttling and decompression component 121, and is greater than twice the total flow area of the plurality of drainage holes 122. At the same time, the flow area of each drainage hole 122 is smaller than the inlet flow area of the drainage chamber 14.
[0029] The structural design of the inner sleeve 12 and the outer sleeve 11 can divert the fluid so that the main fluid enters the speed increasing chamber 16 from the throttling hole 1212 of the throttling orifice plate 1211. The inner diameter of the inner sleeve 12 decreases and then increases along the flow direction of the medium, which can achieve the effect achieved by the Laval nozzle. Therefore, the fluid flow rate is increased, the flow capacity is increased, and the flow resistance caused by the throttling orifice plate is compensated; the secondary fluid is guided to the drainage chamber 14 by the outer contour of the inner sleeve 12. Because there is no pressure reduction, the medium pressure in the drainage chamber 14 is higher than the medium pressure in the speed increasing chamber 16. The medium in the drainage chamber 14 is sprayed into the speed increasing chamber 16 through the drainage hole. Due to the drainage effect, the medium flow rate in the speed increasing chamber 16 is further increased, thereby achieving the purpose of improving the flow capacity under the same outer sleeve 11 diameter;
[0030] The device 1 also includes a flow equalizer 13 in the shape of a water droplet and arranged at the outlet end of the inner sleeve 12. The flow equalizer 13 is arranged at the outlet end of the inner sleeve 12 through a plurality of connecting brackets 18. A through groove 181 for medium circulation is provided between two adjacent connecting brackets 18. One end of the connecting bracket 18 is fixedly connected to the flow equalizer 13, and the other end is connected to the end of the outer sleeve 11. The inlet section 131 of the flow equalizer 13 is arc-shaped, and the outlet section 132 is conical. The flow equalizer 13 is coaxially arranged with the main pipeline 2. The design of the flow equalizer 13 can eliminate the uneven flow velocity caused by the injection of the drainage hole 122 through the arc-shaped inlet section 131 and the conical outlet section 132, and can also reduce the noise level and vibration frequency of the medium when it flows.
[0031] The workflow of this utility model:
[0032] Method for installing the device 1 between two adjacent main pipelines 2:
[0033] The outlet section 132 of the flow equalizer 13 of the device 1 is installed toward the medium outflow direction of the main pipeline 2 , and the two ends of the outer sleeve 11 of the device 1 are fixed to the opposite surfaces of two adjacent main pipelines 2 respectively.
[0034] Working process when medium flows:
[0035] The medium enters from the main pipeline 2 on the inlet side of the device 1, and enters the inlet of the outer sleeve 11 of the device 1, and then enters the inner cavity of the outer sleeve 11 on the left side of the throttling and pressure reducing component 121. The medium in the inner cavity of the outer sleeve 11 is divided into two paths by the inner sleeve 12, one path is the main fluid, and the other path is the secondary fluid. The main fluid enters the speed increasing chamber 16 after being reduced in pressure and throttled through a plurality of throttling holes 1212 on the throttling orifice plate 1211 of the throttling and pressure reducing component 121. The design of the inner cavity of the speed increasing chamber 16 is equivalent to a Laval nozzle, so as to increase the fluid flow velocity in the speed increasing chamber 16, increase the flow capacity, and make up for the defect that the flow resistance of the device 1 is increased after the throttling orifice plate 1211 is installed;
[0036] At the same time, the auxiliary fluid passes through the transition slope 1213 at the end of the throttling orifice plate 1211 from the inner cavity of the outer sleeve 11 on the left side of the throttling pressure reducing member 121, and enters the drainage cavity 14 formed between the inner sleeve 12 and the outer sleeve 11. Because the pressure is not reduced, the high-pressure medium is sprayed into the speed increasing cavity 16 through the plurality of drainage holes 122 on the side wall of the inner sleeve 12. In addition, the design of the acute angle between the medium flow direction in each drainage hole 122 and the medium flow direction in the inner sleeve 12 and the drainage effect further increases the speed of the medium fluid passing through the outlet of the speed increasing cavity 16. At the same time, the flow rate of the auxiliary fluid through the drainage hole 122 is small, so it will not affect the overall pressure reducing effect of the device 1.
[0037] The fluid in the speed increasing chamber 16 passes through the inlet section 131 of the flow equalizer 13 and the through groove 181 formed by the connecting bracket 18, is smoothly divided and flows out, and then is mixed through the conical outlet section 132 of the flow equalizer to eliminate the uneven flow velocity caused by the drainage injection, and reduce the problems of noise, eddy current and excessive pipeline vibration when the medium fluid flows. Then, the medium after flow equalization flows out from the main pipeline 2 on the outlet side of the device 1 to achieve the effect of equal flow, so that the fluid can flow evenly in the main pipeline 2 on the outlet side of the device 1;
[0038] The device 1 of the present application can achieve the purpose of improving the flow capacity of the medium under the same pipe diameter.
[0039] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.
Claims
1. A decompression and throttling device with drainage function, characterized in that: The device (1) is installed between two adjacent main pipelines (2), and comprises an outer sleeve (11) and an inner sleeve (12). Both sides of the outer sleeve (11) are respectively connected to the two adjacent main pipelines (2), and the inner sleeve (12) is arranged inside the outer sleeve (11). The outer wall of the outlet end of the inner sleeve (12) is fixedly connected to the inner wall of the outlet end of the outer sleeve (11) to prevent the medium from flowing out from between the two. The inlet end is provided with A throttling and pressure reducing component (121), wherein a drainage chamber (14) is formed between the outer wall of the inner sleeve (12) and the inner wall of the outer sleeve (11), wherein the drainage chamber (14) is connected to the inner chamber at the inlet of the outer sleeve (11), wherein a speed increasing chamber (16) is provided in the inner sleeve (12), and a drainage hole (122) is provided on the side wall of the inner sleeve (12), wherein the drainage chamber (14) is connected to the speed increasing chamber (16) through the drainage hole (122).
2. A decompression and throttling device with drainage function according to claim 1, characterized in that: The speed increasing cavity (16) is composed of a first cavity section and a second cavity section which are sequentially connected along the flow direction of the medium therein; the diameter of the first cavity section decreases sequentially along the flow direction of the medium therein, and the diameter of the second cavity section increases sequentially along the flow direction of the medium therein.
3. A decompression and throttling device with drainage function according to claim 2, characterized in that: The outlet end of the drainage hole (122) is located at the connection between the first cavity section and the second cavity section.
4. A decompression and throttling device with drainage function according to claim 2, characterized in that: There are a plurality of drainage holes (122), which are arranged along the circumferential direction of the inner sleeve (12), and the medium flow direction in each drainage hole (122) is arranged at an acute angle to the medium flow direction in the inner sleeve (12).
5. A decompression and throttling device with drainage function according to claim 1, characterized in that: The throttling pressure reducing component (121) is fixedly provided at the inlet of the inner sleeve (12), and the throttling pressure reducing component (121) comprises a throttling orifice plate (1211) and a plurality of throttling holes (1212) arranged at intervals on the throttling orifice plate (1211), and the throttling holes (1212) are respectively connected to the inner cavity and the speed increasing cavity (16) at the inlet of the outer sleeve (11), and a transition slope (1213) is provided on the end surface of the throttling orifice plate (1211) close to the inlet of the outer sleeve (11).
6. A decompression and throttling device with drainage function according to claim 1, characterized in that: The device (1) further comprises a flow equalizing member (13) arranged at the outlet end of the inner sleeve (12).
7. A decompression and throttling device with drainage function according to claim 6, characterized in that: The flow equalizing member (13) is arranged at the outlet end of the inner sleeve (12) via a plurality of connecting brackets (18), and a through groove (181) for medium circulation is provided between two adjacent connecting brackets (18).
8. A decompression and throttling device with drainage function according to claim 7, characterized in that: One end of the connecting bracket (18) is fixedly connected to the flow equalizing member (13), and the other end is connected to the end of the outer sleeve (11).
9. A decompression and throttling device with drainage function according to claim 6, characterized in that: The inlet section (131) of the flow equalizer (13) is in an arc shape, and the outlet section (132) is in a cone shape. The flow equalizer is coaxially arranged with the main pipeline (2).
10. The decompression and throttling device with drainage function according to claim 1, characterized in that: The inlet flow area of the drainage chamber (14) is less than 10% of the total flow area on the throttling pressure reducing member (121), greater than twice the total flow area of the plurality of drainage holes (122), and at the same time greater than the flow area of each drainage hole (122).