A dimethyl carbonate pipeline pressure stabilizing adjusting device

Abstract

The utility model discloses a kind of dimethyl carbonate pipeline pressure stabilizing regulating devices, comprising: for dimethyl carbonate delivery's delivery pipeline, for dimethyl carbonate output's output pipeline and for dimethyl carbonate output flow regulation's regulating pipeline, the regulating pipeline is installed between delivery pipeline and output pipeline by flange, valve is installed on regulating pipeline;Further include the absorption structure for eliminating water hammer effect, absorption structure is arranged between delivery pipeline and regulating pipeline, absorption structure includes absorption pipeline and bypass pipe, two ends of absorption pipeline are connected together by flange respectively and one end of delivery pipeline and one end of regulating pipeline, bypass pipe is equidistantly surrounded with multiple groups for shunting pressure reduction to liquid on absorption pipeline outer wall.It is effectively reduced that water hammer effect is generated by setting absorption structure, avoid the substantial fluctuation of pressure in pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of dimethyl carbonate pipeline pressure regulating equipment, specifically a dimethyl carbonate pipeline pressure stabilization and regulation device. Background Technology

[0002] Dimethyl carbonate (DMC) is an important green chemical raw material. It is a colorless and transparent liquid at room temperature, flammable, slightly soluble in water, and miscible with many organic solvents such as alcohols and ethers. Due to the presence of active groups such as methyl, methoxy, and carbonyl groups in its molecular structure, it is chemically active and can participate in various chemical reactions such as methylation and carbonylation. It is commonly used in the synthesis of polycarbonates and pharmaceutical intermediates, and can also be used as a solvent and gasoline additive. It is characterized by low toxicity and easy degradation, which meets the requirements of modern green chemical development.

[0003] Dimethyl carbonate, as an important chemical raw material, requires strict control of pressure fluctuations during pipeline transportation. Chinese patent application number CN202411142856.2 discloses a self-operated pressure regulating valve, including a valve body and side connecting pipes movably installed at both ends of the valve body. An elliptical assembly plate is fixedly installed on the top of the valve body. By rotating the adjustment handwheel, the threaded rod is driven to rise and fall on the assembly bracket, thereby moving the lifting cover on the upper shell. This changes the volume of the structure composed of the upper shell and the lifting cover, and the volume difference between the lifting cover and the lower shell also changes, thus achieving the adjustment of the pressure difference across the rubber diaphragm. When dealing with liquids with excessively high flow rates, the volume of the structure composed of the upper shell and the lifting cover can be changed to adapt to liquids with different flow rates.

[0004] However, the above-mentioned technical solutions and traditional liquid pressure regulating equipment still have defects. When the flow rate in the pipeline changes, such as valve opening and closing, pump starting and stopping, etc., water hammer effect is easily generated, resulting in large pressure fluctuations, which may cause pipeline vibration or even rupture. Therefore, we need to propose a dimethyl carbonate pipeline pressure stabilization and regulation device. Utility Model Content

[0005] The purpose of this invention is to provide a dimethyl carbonate pipeline pressure stabilization and regulation device. By setting up an absorption structure, the liquid is diverted and depressurized using a bypass pipe. The liquid backflows in the bypass pipe and cancels out the impact force of the liquid in the absorption pipe, thereby effectively reducing the water hammer effect and avoiding large fluctuations in the pipeline pressure, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dimethyl carbonate pipeline pressure stabilizing and regulating device, comprising:

[0008] A conveying pipeline for conveying dimethyl carbonate, an output pipeline for discharging dimethyl carbonate, and a regulating pipeline for regulating the output flow of dimethyl carbonate, wherein the regulating pipeline is installed between the conveying pipeline and the output pipeline via a flange, and a valve is installed on the regulating pipeline;

[0009] It also includes an absorption structure for eliminating water hammer effect. The absorption structure is set between the delivery pipe and the regulating pipe. The absorption structure includes an absorption pipe and a bypass pipe. The two ends of the absorption pipe are connected to one end of the delivery pipe and one end of the regulating pipe respectively through flanges. The bypass pipe is equidistantly arranged around the outer wall of the absorption pipe in multiple sets for diverting and reducing pressure of the liquid.

[0010] Preferably, the bypass pipe is arranged in the shape of an arc in an Archimedean spiral, and the two ends of the bypass pipe are respectively connected to the inner cavities of the two ends of the absorption pipe. The liquid enters through one end of the bypass pipe and enters the absorption pipe from the other end, generating backflow and canceling out the liquid impact force in the absorption pipe.

[0011] Preferably, it further includes a reinforcing structure for improving the water hammer effect elimination capability. The reinforcing structure is disposed between the absorption structure and the regulating pipe. The reinforcing structure includes a connecting pipe, the two ends of which are connected together by flanges and one end of the absorption pipe and one end of the regulating pipe, respectively.

[0012] Preferably, multiple sets of inclined tubes are arranged around the outer wall of the connecting pipe. The inclined tubes are inclined in the direction of liquid delivery on the connecting pipe, and the inclination angle is between 15° and 45° to facilitate pressure relief of the liquid.

[0013] Preferably, a piston is slidably sealed inside the inclined tube, a connecting rod is located at the center of the piston, the upper end of the connecting rod is slidably sealed and inserted into the top of the inclined tube, rubber washers are provided on the top surface of the piston and the top of the inclined tube, and a compression spring is sleeved on the connecting rod, with the two ends of the compression spring abutting against two sets of washers respectively.

[0014] Preferably, the piston is provided with a cylindrical sealing ring made of rubber at the top, which surrounds the compression spring, washer and connecting rod. A sealing groove is provided at the top of the inclined tube. When the piston slides upward, the sealing ring is inserted into the sealing groove to play a role in limiting, protecting and sealing.

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

[0016] 1. An arc-shaped bypass pipe is installed around the absorption pipeline. When water hammer impact occurs in the delivery pipeline due to valve opening and closing operations, part of the liquid flow is diverted through the bypass pipe, forming a backflow in the opposite direction to the impact of the main pipeline. The impact force is offset by fluid counter-flow, reducing the pressure fluctuation amplitude. At the same time, the equidistant bypass pipe group can divert the impact liquid flow at different locations simultaneously, avoiding local pressure concentration and improving the overall buffering effect of the absorption structure.

[0017] 2. The inclined tube of the reinforced structure is tilted in the direction of liquid delivery. When water hammer impact causes a sudden increase in pressure, the liquid flow pushes the piston to compress the spring, and the inclined tube opens the pressure relief channel, converting the excess pressure energy into the elastic potential energy of the spring to achieve dynamic pressure relief. After the pressure recovers, the spring pushes the piston to reset and closes the pressure relief channel to avoid insufficient pressure caused by continuous pressure relief. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the absorption pipe of this utility model;

[0020] Figure 3 This is a schematic diagram of the connecting pipe structure of this utility model;

[0021] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0022] In the diagram: 1. Regulating pipe; 2. Conveying pipe; 3. Output pipe; 4. Absorption pipe; 5. Bypass pipe; 6. Connecting pipe; 7. Inclined pipe; 8. Piston; 9. Connecting rod; 10. Limiting block; 11. Washer; 12. Compression spring; 13. Sealing ring; 14. Sealing groove; 15. Valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-2 This utility model provides a technical solution:

[0025] A dimethyl carbonate pipeline pressure stabilizing and regulating device, comprising:

[0026] The system includes a conveying pipe 2 for conveying dimethyl carbonate, an output pipe 3 for outputting dimethyl carbonate, and a regulating pipe 1 for regulating the output flow of dimethyl carbonate. The regulating pipe 1 is installed between the conveying pipe 2 and the output pipe 3 via a flange, and a valve 15 is installed on the regulating pipe 1.

[0027] It also includes an absorption structure for eliminating water hammer effect. The absorption structure is set between the conveying pipe 2 and the regulating pipe 1. The absorption structure includes an absorption pipe 4 and a bypass pipe 5. The two ends of the absorption pipe 4 are connected to one end of the conveying pipe 2 and one end of the regulating pipe 1 respectively through flanges. The bypass pipe 5 is equidistantly arranged around the outer wall of the absorption pipe 4 with multiple sets for diverting and reducing pressure of the liquid.

[0028] More specifically, the bypass pipe 5 is arranged in the arc shape of an Archimedean spiral. The two ends of the bypass pipe 5 are connected to the inner cavities of the two ends of the absorption pipe 4, respectively. The liquid enters from one end of the bypass pipe 5 and enters the absorption pipe 4 from the other end, generating backflow and canceling out the liquid impact force in the absorption pipe 4.

[0029] Dimethyl carbonate flows into regulating pipe 1 via conveying pipe 2. The output flow is controlled by valve 15 on regulating pipe 1, which directs the flow to output pipe 3, forming the main conveying path. When valve 15 is opened or closed, or when the pump is started or stopped, the sudden change in flow rate in the pipe causes pressure fluctuations.

[0030] The bypass pipe 5 is an Archimedean spiral arc surrounding the absorption pipe 4, with its two ends connected to the inlet and outlet of the absorption pipe 4, respectively. When water hammer impact occurs in the delivery pipe 2, some of the liquid flows along the spiral path of the bypass pipe 5. Due to the extended path, the flow velocity decreases, and the outflow direction is opposite to the impact direction of the main pipe, forming a countercurrent backflow. Furthermore, the spiral design generates centrifugal force in the liquid flow, further dissipating the impact energy and offsetting the sudden pressure rise in the main pipe through the principle of fluid dynamics. At the same time, the equidistantly surrounding bypass pipes 5 simultaneously divert the impact liquid flow from different locations, forming multi-directional countercurrent, avoiding local pressure concentration, and improving the overall buffering effect of the absorption structure.

[0031] Please see Figure 1 , 3 4:

[0032] It also includes a reinforcing structure to improve the water hammer effect elimination capability. The reinforcing structure is set between the absorption structure and the regulating pipe 1. The reinforcing structure includes a connecting pipe 6, the two ends of which are connected to one end of the absorption pipe 4 and one end of the regulating pipe 1 via flanges, respectively. Multiple sets of inclined pipes 7 are arranged around the outer wall of the connecting pipe 6. The inclined pipes 7 are inclined in the direction of liquid delivery on the connecting pipe 6, with an inclination angle between 15° and 45° to facilitate liquid pressure relief. A piston 8 is slidably sealed inside the inclined pipe 7. A connecting rod 9 is located at the center of the piston 8. The upper end of the connecting rod 9 is slidably sealed and inserted into the top of the inclined pipe 7. Rubber gaskets 11 are provided on the top surface of the piston 8 and the top of the inner side of the inclined pipe 7. A compression spring 12 is sleeved on the connecting rod 9, with its two ends abutting against the two sets of gaskets 11. A limit block 10 is provided at the end of the connecting rod 9 located outside the inclined pipe 7.

[0033] During use, the inclined tube 7 is tilted 15°-45° in the direction of liquid delivery. When water hammer impact causes a sudden pressure rise, the liquid flow pushes the piston 8 to overcome the resistance of the compression spring 12 and slide upward, converting the pressure energy into the elastic potential energy of the spring. After the pressure is restored, the spring pushes the piston 8 to reset, avoiding continuous pressure relief and insufficient system pressure. The rubber gasket 11 on the top surface of the piston 8 and the top of the inclined tube 7 buffer the impact of the piston 8 movement and reduce vibration noise. The cylindrical sealing ring 13 on the top of the piston 8 is inserted into the sealing groove 14 on the top of the inclined tube 7 when the piston 8 slides upward, forming a double seal to prevent medium leakage during pressure relief and limit the stroke of the piston 8.

[0034] In summary, based on the initial pressure reduction of the absorption structure, the pressure relief amount is dynamically adjusted by the piston 8-spring mechanism to further reduce pressure fluctuations; it can automatically adjust the pressure relief amplitude according to the water hammer impact intensity, and adapt to pressure changes under different working conditions such as valve 15 opening and closing, pump start and stop.

[0035] In addition, please see Figure 3-4 :

[0036] The piston 8 is provided with a cylindrical rubber sealing ring 13 on its top. The sealing ring 13 surrounds the compression spring 12, the washer 11 and the connecting rod 9. The top of the inclined tube 7 is provided with a sealing groove 14. When the piston 8 slides upward, the sealing ring 13 is inserted into the sealing groove 14 to play a role in limiting, protecting and sealing.

[0037] When the piston 8 slides upward, the cylindrical sealing ring 13 is embedded in the sealing groove 14 at the top of the inclined tube 7, and the elastic deformation of the rubber fills the gap to form a static seal; the compression spring 12 generates a downward restoring force after being compressed, which, together with the sealing ring 13, restricts the piston 8 from sliding too upward, thus achieving the limiting function.

[0038] In summary, the fit between the sealing groove 14 and the sealing ring 13 limits the maximum stroke of the piston 8, preventing excessive pressure relief; the double sealing design (sliding seal of piston 8 + static seal inside the groove) ensures no leakage of dimethyl carbonate, which is especially suitable for highly volatile media; it reduces the direct impact between piston 8 and inclined tube 7, reduces mechanical wear through elastic buffering, and extends the service life of elastic elements.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dimethyl carbonate pipeline pressure stabilization and regulation device, characterized in that, include: A conveying pipe (2) for conveying dimethyl carbonate, an output pipe (3) for outputting dimethyl carbonate, and a regulating pipe (1) for regulating the output flow of dimethyl carbonate, wherein the regulating pipe (1) is installed between the conveying pipe (2) and the output pipe (3) via a flange, and a valve (15) is installed on the regulating pipe (1); It also includes an absorption structure for eliminating water hammer effect. The absorption structure is set between the conveying pipe (2) and the regulating pipe (1). The absorption structure includes an absorption pipe (4) and a bypass pipe (5). The two ends of the absorption pipe (4) are connected to one end of the conveying pipe (2) and one end of the regulating pipe (1) respectively through flanges. The bypass pipe (5) is equidistantly arranged around the outer wall of the absorption pipe (4) with multiple sets for diverting and reducing pressure of the liquid.

2. The dimethyl carbonate pipeline pressure stabilizing and regulating device according to claim 1, characterized in that: The bypass pipe (5) is arranged in the shape of an arc in an Archimedean spiral. The two ends of the bypass pipe (5) are connected to the inner cavities of the two ends of the absorption pipe (4). The liquid enters from one end of the bypass pipe (5) and enters the absorption pipe (4) from the other end, generating backflow and canceling out the liquid impact force in the absorption pipe (4).

3. The dimethyl carbonate pipeline pressure stabilizing and regulating device according to claim 1, characterized in that: It also includes a reinforcing structure for improving the water hammer effect elimination capability. The reinforcing structure is disposed between the absorption structure and the regulating pipe (1). The reinforcing structure includes a connecting pipe (6), the two ends of which are connected together by a flange and one end of the absorption pipe (4) and one end of the regulating pipe (1), respectively.

4. The dimethyl carbonate pipeline pressure stabilizing and regulating device according to claim 3, characterized in that: Multiple sets of inclined tubes (7) are arranged around the outer wall of the connecting pipe (6). The inclined tubes (7) are inclined in the direction of liquid delivery on the connecting pipe (6) with an inclination angle between 15° and 45° to facilitate pressure relief of the liquid.

5. The dimethyl carbonate pipeline pressure stabilizing and regulating device according to claim 4, characterized in that: A piston (8) is slidably sealed inside the inclined tube (7). A connecting rod (9) is located at the center of the piston (8). The upper end of the connecting rod (9) is slidably sealed and inserted into the top of the inclined tube (7). Rubber washers (11) are provided on the top surface of the piston (8) and the top of the inclined tube (7). A compression spring (12) is sleeved on the connecting rod (9). The two ends of the compression spring (12) abut against the two sets of washers (11) respectively.

6. The dimethyl carbonate pipeline pressure stabilizing and regulating device according to claim 5, characterized in that: The piston (8) is provided with a cylindrical sealing ring (13) made of rubber. The sealing ring (13) surrounds the compression spring (12), the washer (11) and the connecting rod (9). The top of the inclined tube (7) is provided with a sealing groove (14). When the piston (8) slides up, the sealing ring (13) is inserted into the sealing groove (14) to play a role in limiting, protecting and sealing.

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