Adjustable annular pressure reducing device for low pressure

Abstract

The low-pressure adjustable annular pressure reducing device comprises a shell, the interior of the shell is hollow, an adjustable pressure reducing annular pipe is arranged in the shell, and the adjustable pressure reducing annular pipe is provided with an input end and an output end. The output end and the output end of the adjustable pressure reducing ring pipe respectively extend towards the two ends of the adjustable pressure reducing ring pipe and extend out of the adjustable pressure reducing ring pipe; the whole adjustable pressure reduction ring pipe is an elastic hose, can be stretched and compressed and has adjustability, the middle of the adjustable pressure reduction ring pipe is rolled to form a multi-circle spiral shape, and all circles of pipelines are tightly attached and fixed through pipe hoops to prevent vibration. And an adjusting rod is arranged at the top of the shell. The adjustable annular pressure reducing device is simple in structure, convenient to install, high in applicability and very suitable for industrial production and living needs.

Description

Technical Field

[0001] The utility model relates to the field of pressure reducing devices, in particular to a low-pressure adjustable annular pressure reducing device. Background Art

[0002] In many industries and life fields, there is a need to transport fluids, and it is also essential to control and adjust the pressure of the fluid during the transportation process. For example, the aerospace field has a very high requirement for the pressure of the gas source. The adjustable pressure reducing device can ensure that the gas reaches a balance between high pressure and low pressure, so that the performance of aircraft and spacecraft can reach the best state. For example, the pressure of the fluid needs to be controlled in domestic water and gas, so an adjustable pressure reducing device is very necessary.

[0003] China's utility model patent CN203948733U discloses a "gas pressure reducing pipe". This solution has connecting threads at both ends of the pipe body, which is convenient for connection with the outside. The pressure difference between the high-pressure cavity and the low-pressure cavity in the pipe body and the spring connected between the high-pressure cavity and the low-pressure cavity realize the pressure reducing function. The device is small and flexible, with good pressure reducing effect, but its application range is narrow and it is only suitable for the pressure reducing of a small amount of gas medium.

[0004] Chinese utility model patent CN203979775U discloses a "water pipe connection mechanism with a diversion pressure-reducing pipeline". The scheme consists of a first and second connecting pipes and an elastic connecting hose. The first connecting pipe is provided with a diversion branch pipe, and a one-way pressure valve is provided between the two. Through the diversion branch pipe, the internal water pressure of the pipe can be effectively reduced to prevent damage to the pipe caused by excessive pressure and extend the service life of the pipe. The device is cleverly designed, but its pressure reduction effect cannot be adjusted and its flexibility is not high.

[0005] It is very important to realize simple and efficient adjustable pressure reduction of fluids in engineering and life fields. According to the analysis of the patents that have been published in China, most of the devices are non-adjustable and have a narrow scope of application, which urgently needs to be improved. Utility Model Content

[0006] In order to solve the above problems, the utility model proposes a low-pressure adjustable annular pressure reducing device to solve the above problems in the prior art.

[0007] To achieve the above-mentioned purpose, the utility model provides a low-pressure adjustable annular pressure reducing device comprising: a shell, the interior of the shell is hollow, an adjustable pressure reducing ring tube is arranged inside the shell, the adjustable pressure reducing ring tube has an input end and an output end, the input end and the output end of the adjustable pressure reducing ring tube extend toward the two ends of the adjustable pressure reducing ring tube respectively, and extend out of the interior of the adjustable pressure reducing ring tube;

[0008] The adjustable decompression ring tube is an elastic hose as a whole, which can be stretched and compressed and has adjustability. The middle part of the adjustable decompression ring tube is rolled up to form a multi-circle spiral shape, wherein each circle of the pipe fits tightly and is fixed by a pipe hoop to prevent vibration;

[0009] An adjusting rod is provided on the top of the shell, and the adjusting rod can slide along the width direction of the shell. The bottom of the adjusting rod extends to the inside of the shell and is fixedly connected to the top of the adjustable decompression ring tube. The bottom of the adjusting rod is fixedly connected to a circle of pipes closest to the inner wall of the shell among the multiple circles of pipes formed in the middle of the adjustable decompression ring tube.

[0010] Furthermore, a slide groove is provided on the top of the shell, the slide groove is connected to the interior of the shell, the slide groove extends along the width direction of the shell, and the adjusting rod passes through the slide groove and is connected to the adjustable pressure reducing ring tube; five circular grooves are provided on one side of the slide groove, the circular groove is connected to the interior of the shell, and the circular groove is connected to the slide groove, wherein a notch is formed at the connection point, and the adjusting rod can enter the interior of the circular groove through the notch.

[0011] Furthermore, four pipe hoops are provided on the adjustable pressure reducing ring pipe, and the multiple spiral turns formed by the four pipe hoops are shaped.

[0012] Furthermore, pressure gauges are provided on the output end and the output end of the adjustable pressure reducing ring tube, and the two pressure gauges are located inside the adjustable pressure reducing ring tube; liquid crystal screens are provided on opposite sides of the adjustable pressure reducing ring tube, and the liquid crystal screens are opposite to the pressure gauges, and are used to display the readings of the pressure gauges externally.

[0013] Furthermore, the input end and the output end of the adjustable pressure reducing ring tube are both connected with flanges.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The low-pressure adjustable annular pressure reducing device has a simple structure, is easy to install, and has strong applicability, and is very suitable for industrial production and life needs.

[0016] Second, the low-pressure adjustable annular pressure reducing device can achieve the effect of reducing pressure through a simple annular pipe setting, which is simple and efficient.

[0017] 3. The low-pressure adjustable annular pressure reducing device realizes the adjustable pressure drop through the setting of the elastic hose, and has a wider application range.

[0018] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the shell in the utility model.

[0021] In the figure: 1. Adjustable pressure reducing ring pipe; 2. Adjusting rod; 3. Pressure gauge; 4. Pipe clamp; 5. LCD screen; 6. Housing; 7. Flange. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the following.

[0023] Reference Figure 1-2 As shown, a low-pressure adjustable annular pressure reducing device comprises: a shell 6, the interior of the shell 6 is hollow, an adjustable pressure reducing ring tube 1 is arranged inside the shell 6, the adjustable pressure reducing ring tube 1 has an input end and an output end, the input end and the output end of the adjustable pressure reducing ring tube 1 extend toward both ends of the adjustable pressure reducing ring tube 1 respectively, and extend out of the interior of the adjustable pressure reducing ring tube 1; the adjustable pressure reducing ring tube 1 is an elastic hose as a whole, which can be stretched and compressed and has adjustability, and the middle part of the adjustable pressure reducing ring tube 1 is rolled up to form a plurality of spiral turns, wherein each circle of the pipe fits tightly and is fixed by a pipe clamp to prevent vibration;

[0024] An adjusting rod 2 is provided on the top of the shell 6, and the adjusting rod 2 can slide along the width direction of the shell 6. The bottom of the adjusting rod 2 extends to the inside of the shell 6 and is fixedly connected to the top of the adjustable decompression ring tube 1. The bottom of the adjusting rod 2 is fixedly connected to a circle of pipes closest to the inner wall of the shell 6 among the multiple circles of pipes formed in the middle of the adjustable decompression ring tube 1; a chute is provided on the top of the shell 6, and the chute is connected to the inside of the shell 6. The chute extends along the width direction of the shell 6, and the adjusting rod 2 passes through the chute and is connected to the adjustable decompression ring tube 1; five circular grooves are provided on one side of the chute, and the circular grooves are connected to the inside of the shell 6, and the circular grooves are connected to the chute, wherein a notch is formed at the connection point, and the adjusting rod 2 can enter the inside of the circular groove through the notch;

[0025] Four pipe hoops 4 are arranged on the adjustable pressure reducing ring pipe 1, and the multiple spiral turns formed by the four pipe hoops 4 are shaped.

[0026] The utility model provides a technical solution. When in use, the output end and the input end of the adjustable decompression ring tube 1 are respectively connected and fixed to the external pipeline. When the fluid passes through the adjustable decompression ring tube 1, the fluid is decompressed through the formed multiple-circle pipeline. When it is necessary to adjust the decompression pressure drop, the staff moves the adjusting rod 2 along the width direction of the shell 6, and then moves the adjusting rod 2 along the direction of the shell 6 after the movement, so that the adjusting rod 2 enters the circular groove through the notch, and the position of the adjusting rod 2 is fixed. The moving adjusting rod 2 can change the compression or elongation of the adjustable decompression ring tube 1, thereby realizing the adjustment of the pressure drop. The shape of the adjustable decompression ring tube 1 is fixed by four pipe clamps 4 to prevent vibration during operation.

[0027] In this embodiment, the design of the adjustable pressure reducing ring pipe 1 is as follows:

[0028] 1. Input: upstream pressure P1, downstream required pressure P2;

[0029] 2. Loop section: Select the pipe diameter d; bending radius R; flow rate Q; then the flow velocity v = Q / ((πd) 2 / 4);

[0030] 90° elbow local loss coefficient ξ 90 =0.131+0.1632×(d / R) 3.5 ;

[0031] Then the local loss hf1=4×ξ 90 (v 2 / 2g);

[0032] Viscosity coefficient μ; water density ρ; Reynolds number Re = ρvd / μ; along-the-line loss coefficient λ; length of the horizontal section of the annular pipe L1;

[0033] Then the loss along the way hf2=λ(2πR+2L1) / d×v 2 / 2g;

[0034] Total loss of a single tube: hf = hf1 + hf2; number of ring tube turns n;

[0035] The total loss of the ring pipe hf 环 =n×hf;

[0036] 3. Interface section:

[0037] Straight pipe length L2; elbow loss coefficient ξ 3 ;

[0038] Then the interface loss hf3=(λL2 / d+ξ 3 )×v 2 / 2g;

[0039] 4. Total loss of pressure relief loop device: hf total =hf 环 +hf3, according to P1-P2=hf total Principle, determine the total loss required.

[0040] Preferably: pressure gauges 3 are provided on the output end and the output end of the adjustable pressure reducing ring tube 1, and the two pressure gauges 3 are located inside the adjustable pressure reducing ring tube 1; liquid crystal screens 5 are provided on opposite sides of the adjustable pressure reducing ring tube 1, and the liquid crystal screens 5 are opposite to the pressure gauges 3, and are used to display the reading of the pressure gauges 3 on the pressure gauges 3.

[0041] Specifically, the pressure gauge 3 and the liquid crystal screen 5 are provided to facilitate the staff to observe the pressure value in real time.

[0042] Preferably, the input end and the output end of the adjustable pressure reducing ring pipe 1 are both connected with flanges 7 .

[0043] Specifically, the flange 7 is provided to facilitate connection with an external pipeline.

[0044] Working principle and process: When in use, the output end and input end of the adjustable pressure reducing ring tube 1 are respectively connected and fixed to the external pipe. When the fluid passes through the adjustable pressure reducing ring tube 1, the fluid is decompressed through the formed multiple circles of pipes. When it is necessary to adjust the pressure drop, the staff moves the adjusting rod 2 along the width direction of the outer shell 6, and then moves the adjusting rod 2 along the direction of the outer shell 6, so that the adjusting rod 2 enters the circular groove through the notch, and fixes the position of the adjusting rod 2. The moved adjusting rod 2 can change the compression or elongation of the adjustable pressure reducing ring tube 1, thereby achieving the adjustment of the pressure drop. The shape of the adjustable pressure reducing ring tube 1 is fixed by the four pipe clamps 4 to prevent vibration during operation.

[0045] The above disclosure is only a preferred embodiment of the present invention, which 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 still fall within the scope covered by the present invention.

Claims

1. A low-pressure adjustable annular pressure reducing device, comprising: The outer shell (6) is hollow inside, characterized in that an adjustable decompression ring tube (1) is arranged inside the outer shell (6), the adjustable decompression ring tube (1) has an input end and an output end, the input end and the output end of the adjustable decompression ring tube (1) respectively extend in the directions of both ends of the adjustable decompression ring tube (1) and extend out of the interior of the adjustable decompression ring tube (1); The adjustable decompression ring tube (1) is an elastic hose as a whole, which can be stretched and compressed and has adjustability. The middle part of the adjustable decompression ring tube (1) is rolled up to form a plurality of spiral turns, wherein each turn of the pipe fits tightly and is fixed by a pipe clamp to prevent vibration. An adjusting rod (2) is arranged at the top of the shell (6), and the adjusting rod (2) can slide along the width direction of the shell (6). The bottom of the adjusting rod (2) extends to the inside of the shell (6) and is fixedly connected to the top of the adjustable pressure reducing ring tube (1). The bottom of the adjusting rod (2) is fixedly connected to a circle of pipes closest to the inner wall of the shell (6) among the multiple circles of pipes formed in the middle of the adjustable pressure reducing ring tube (1).

2. A low-pressure adjustable annular pressure reducing device according to claim 1, characterized in that: The top of the shell (6) is provided with a slide groove, the slide groove is communicated with the interior of the shell (6), the slide groove extends along the width direction of the shell (6), and the adjustment rod (2) passes through the slide groove and is connected to the adjustable pressure reducing ring tube (1).

3. A low-pressure adjustable annular pressure reducing device according to claim 2, characterized in that: One side of the slide groove is provided with five circular grooves, the circular grooves are connected to the interior of the housing (6), and the circular grooves are connected to the slide groove, wherein a notch is formed at the connection point, and the adjustment rod (2) can enter the interior of the circular groove through the notch.

4. A low-pressure adjustable annular pressure reducing device according to claim 1, characterized in that: The adjustable pressure reducing ring tube (1) is provided with four pipe hoops (4), and the formed multiple spiral turns are shaped by the four pipe hoops (4).

5. The low-pressure adjustable annular pressure reducing device according to claim 1, characterized in that: Pressure gauges (3) are provided at the output end and the output end of the adjustable pressure reducing ring tube (1), and the two pressure gauges (3) are both located inside the adjustable pressure reducing ring tube (1).

6. A low-pressure adjustable annular pressure reducing device according to claim 5, characterized in that: Liquid crystal screens (5) are provided on opposite sides of the adjustable pressure reducing ring tube (1), and the liquid crystal screens (5) are opposite to the pressure gauge (3) and are used to display the reading of the pressure gauge (3) externally.

7. The low-pressure adjustable annular pressure reducing device according to claim 1, characterized in that: The input end and the output end of the adjustable pressure reducing ring pipe (1) are both connected with flanges (7).

Images