Adjustable annular pressure reducing device for high pressure

Abstract

The high-pressure adjustable annular pressure reducing device comprises a shell, the interior of the shell is hollow, three pressure reducing annular pipes are arranged in the shell, the pressure reducing annular pipes are rigid pipes and are in the shape of a multi-circle spiral curve, the three pressure reducing annular pipes are arranged in the shell side by side, and the three pressure reducing annular pipes are arranged in the shell side by side. The pressure reducing ring pipe is provided with an input end and an output end; and the two ends of the shell are provided with two water conveying cylinders, the output ends of the multiple pressure reducing ring pipes are connected with one water conveying cylinder, and the input ends of the multiple pressure reducing ring pipes are connected with the other water conveying cylinder. The pressure drop can be controlled and adjusted by matching the three groups of rigid annular pipelines with the inlet and outlet flanges, and the pressure drop adjusting device is simple and efficient.

Description

Technical Field

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

[0002] In the process of fluid transportation, it is often necessary to control and adjust the pressure of the fluid. For example, in the fields of aerospace, petrochemicals, hydropower stations, thermal power stations, and domestic water and gas, the pressure of the transported fluid needs to be controlled. Therefore, adjustable utility models are very necessary.

[0003] Chinese utility model patent CN201680397U discloses a "compressed natural gas throttling utility model tank body", which consists of a tank shell, a natural gas rotary pressure reducing pipeline and a throttling pressure reducing component, and controls the natural gas pressure through two groups of utility models. The device has a good pressure reducing effect, but the device is large and cannot achieve the adjustment function.

[0004] Chinese utility model patent CN202017824U discloses "a liquid decompression pipe", which includes a circulation pipe and flanges at the inlet and outlet of the circulation pipe. This utility model effectively solves the technical problem that the existing liquid utility model cannot adapt to the decompression requirements of high-pressure and high-temperature liquid media. However, its decompression effect cannot be adjusted, and it is only applicable to liquid decompression, and its flexibility is not high.

[0005] It is very necessary to realize simple and efficient adjustable pressure reduction of fluids in engineering and life fields. According to the analysis of the patents currently published in China, most of the devices are non-adjustable and have a narrow scope of application, which urgently needs to be solved. Summary of the invention

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

[0007] To achieve the above object, the utility model provides a high-pressure adjustable annular pressure reducing device comprising: a shell, the interior of the shell is hollow, three pressure reducing annular tubes are arranged inside the shell, the pressure reducing annular tubes are rigid tubes, and the shape of the pressure reducing annular tubes is a multi-turn spiral curve type, the three pressure reducing annular tubes are arranged side by side inside the shell, and the pressure reducing annular tubes are provided with an input end and an output end;

[0008] Both ends of the shell are provided with water delivery cylinders, and two water delivery cylinders are provided, the output ends of the plurality of pressure reducing ring tubes are connected to one of the water delivery cylinders, and the input ends of the plurality of pressure reducing ring tubes are connected to the other of the water delivery cylinders;

[0009] It also includes four flanges, which are arranged at two ends of the shell in pairs, two of which are rotatably connected to the two ends of the shell, and the other two flanges are connected to the two water delivery cylinders;

[0010] The output ends and input ends of the three pressure reducing ring pipes are respectively connected to the two flanges rotatably arranged at the two ends of the shell;

[0011] The four flanges are each provided with three through holes for connecting the pressure reducing ring pipe and conveying fluid.

[0012] Furthermore, the three pressure reducing ring tubes are extended and distributed inside the shell along the length direction of the shell.

[0013] Furthermore, four pipe hoops are provided on the decompression ring pipe, and the multi-turn spiral curve shape of the decompression ring pipe is shaped by the pipe hoops.

[0014] Furthermore, pressure gauges are provided on both of the water delivery cylinders.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The adjustable utility model can realize the control and adjustment of the pressure drop by cooperating with three sets of rigid annular pipes and the inlet and outlet flanges, which is simple and efficient.

[0017] Second, the adjustable utility model adopts a rigid pipeline and can be used for high-pressure fluids.

[0018] 3. The adjustable utility model has a simple structure and is easy to install.

[0019] 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

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the internal structure of the housing in the utility model;

[0022] Figure 3 It is a structural schematic diagram of the flange in the utility model.

[0023] In the figure: 1. pressure reducing ring pipe; 2. shell; 3. flange; 4. pressure gauge; 5. pipe clamp. DETAILED DESCRIPTION

[0024] 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.

[0025] Reference Figure 1-3 As shown, a high-pressure adjustable annular pressure reducing device comprises: a shell 2, the inside of the shell 2 is hollow, three pressure reducing annular tubes 1 are arranged inside the shell 2, the pressure reducing annular tubes 1 are rigid tubes, and their shape is a multi-turn spiral curve type, the three pressure reducing annular tubes 1 are arranged side by side inside the shell 2, and the pressure reducing annular tubes 1 are provided with an input end and an output end;

[0026] Both ends of the housing 2 are provided with water delivery cylinders, and two water delivery cylinders are provided. The output ends of the plurality of pressure reducing ring tubes 1 are connected to one of the water delivery cylinders, and the input ends of the plurality of pressure reducing ring tubes 1 are connected to the other water delivery cylinder.

[0027] It also includes four flanges 3, which are arranged at two ends of the housing 2 in pairs, two of which are rotatably connected to the two ends of the housing 2, and the other two flanges 3 are connected to the two water delivery cylinders;

[0028] The output ends and input ends of the three pressure reducing ring pipes 1 are respectively connected to two flanges 3 rotatably arranged at both ends of the housing 2;

[0029] The four flanges 3 are each provided with three through holes for connecting the pressure reducing ring pipe 1 and conveying fluid;

[0030] The three pressure reducing ring tubes 1 are extended and distributed inside the housing 2 along the length direction of the housing 2 .

[0031] The utility model provides a technical solution. When in use, a water delivery cylinder is connected and fixed to an external pipeline. Then, after the fluid enters the water delivery cylinder, it is simultaneously delivered to the interior of a pressure reducing ring tube 1 through the water delivery cylinder and a flange 3. The fluid can be effectively depressurized through the formed multi-turn spiral pipeline. When the pressure drop needs to be adjusted, the staff simultaneously rotates the two flanges 3 arranged at both ends of the shell 2. After the two flanges 3 are rotated, they will be disconnected from one of the pressure reducing ring tubes 1. Continuous rotation can disconnect them from more pressure reducing ring tubes 1. At this time, the fluid can only enter and be discharged through one or two connected pressure reducing ring tubes 1, thereby adjusting the pressure drop.

[0032] Among them, the design and selection of the pressure reducing ring pipe 1 are as follows:

[0033] 1. Input: upstream pressure P1, downstream required pressure P2;

[0034] 2. Ring pipe section: Select the pipe diameter d; the number of ring pipes k; then the equivalent ring pipe diameter D = √k × d;

[0035] Bending radius R; flow rate Q; then flow velocity v = Q / ((πD) 2 / 4);

[0036] 90° elbow local loss coefficient ξ 90 =0.131+0.1632×(D / R) 3.5 ;

[0037] Then the local loss hf1=4 × ξ 90 (v 2 / 2g);

[0038] 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;

[0039] Then the loss along the way hf2 = λ (2πR + 2L1) / D × v 2 / 2g;

[0040] Total loss of a single tube: hf=hf1+hf2; number of ring tube turns n;

[0041] The total loss of the ring pipe hf 环 =n×hf;

[0042] 3. Interface section:

[0043] Straight pipe length L2; elbow loss coefficient ξ 3 ;

[0044] Then the interface loss hf3=(λL2 / D+ξ 3 )× v 2 / 2g;

[0045] 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.

[0046] Preferably, four pipe hoops 5 are provided on the pressure reducing ring pipe 1 , and the multi-turn spiral curve shape of the pressure reducing ring pipe 1 is shaped by the pipe hoops 5 .

[0047] Specifically, the pressure reducing ring pipe 1 is shaped by the provided pipe clamp 5 to reduce vibration.

[0048] Preferably: pressure gauges 4 are provided on both water delivery cylinders.

[0049] Specifically, the pressure variable 4 is provided to facilitate users to observe the pressure value.

[0050] Working process and principle: When in use, the water delivery cylinder is connected and fixed to the external pipeline, and then the fluid enters the water delivery cylinder and is simultaneously delivered to the inside of the pressure reducing ring tube 1 through the water delivery cylinder and the flange 3. The fluid can be effectively depressurized through the formed multi-turn spiral pipeline. When the pressure drop needs to be adjusted, the staff simultaneously rotates the two flanges 3 set on both ends of the shell 2. After the two flanges 3 rotate, they will be disconnected from one of the pressure reducing ring tubes 1. Continuous rotation can disconnect more pressure reducing ring tubes 1. At this time, the fluid can only enter and discharge through one or two connected pressure reducing ring tubes 1, thereby adjusting the pressure drop;

[0051] The set pressure variable 4 makes it convenient for users to observe the pressure value.

[0052] 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 high-pressure adjustable annular pressure reducing device, comprising: A shell (2), wherein the interior of the shell (2) is hollow, characterized in that three pressure-reducing ring tubes (1) are arranged inside the shell (2), the pressure-reducing ring tubes (1) are rigid tubes, and are in the shape of a multi-turn spiral curve, the three pressure-reducing ring tubes (1) are arranged side by side inside the shell (2), and the pressure-reducing ring tubes (1) are provided with an input end and an output end; Water delivery cylinders are provided at both ends of the housing (2), and two of the water delivery cylinders are provided, the output ends of the plurality of pressure reducing ring tubes (1) are connected to one of the water delivery cylinders, and the input ends of the plurality of pressure reducing ring tubes (1) are connected to the other of the water delivery cylinders; It also comprises four flanges (3), the four flanges (3) being arranged opposite to each other at two ends of the housing (2), two of the flanges (3) being rotatably connected to the two ends of the housing (2), and the other two flanges (3) being connected to the two water delivery cylinders; The output ends and input ends of the three pressure reducing ring tubes (1) are respectively connected to the two flanges (3) rotatably arranged at the two ends of the housing (2); Three through holes are provided on each of the four flanges (3) for connecting the pressure reducing ring pipe (1) and conveying fluid.

2. The high-pressure adjustable annular pressure reducing device according to claim 1, characterized in that: The three pressure reducing ring tubes (1) are distributed and extend inside the outer shell (2) along the length direction of the outer shell (2).

3. The high-pressure adjustable annular pressure reducing device according to claim 2, characterized in that: The decompression ring tube (1) is provided with four pipe hoops (5), and the multi-turn spiral curve shape of the decompression ring tube (1) is shaped by the pipe hoops (5).

4. The high-pressure adjustable annular pressure reducing device according to claim 1, characterized in that: Both water delivery cylinders are provided with pressure gauges (4).

Images