A three-stage pressure regulating device for ethylene system

Abstract

The utility model discloses a kind of ethylene system three-stage pressure regulating device, it includes three straight pipes: the surface of the straight pipe is sequentially communicated with pressure reducing valve, safety valve and manual emptying valve.The utility model is installed pressure reducing valve on straight pipe, so that ethylene outlet pipeline is installed in series only pressure reducing valve and is segmented decompression, first section high pressure 8MPa is reduced to medium pressure 2MPa, second section is reduced to low pressure 0.3MPa, third section is reduced to micro pressure 0.15MPa, and safety valve is equipped between every junction decompression, and manual emptying valve, ensure that every section pipeline safety and maintenance convenience, simultaneously, leakage detection is carried out to multiple valve outer sides by ethylene sensor, can be controlled by controller Control warning light flashes warning, further guarantee the safety of pipeline, can reach three-stage pressure regulating, three-stage pressure regulating is normally under normal circumstances Gradual decompression, gradual decompression can reduce pressure difference of each decompression, reduce the situation of frost formation in pressure drop heat absorption pipeline, pressure is stable, and the purpose of not needing frequent manual pressure regulating.

Description

Technical Field

[0001] This utility model belongs to the field of ethylene ventilation technology, and in particular relates to a three-stage pressure regulating device for an ethylene system. Background Technology

[0002] Ethylene is a colorless and odorless gas widely used in the chemical industry, especially in the production of plastics and synthetic fibers. However, ethylene is highly flammable and diffuse, therefore, strict safety measures must be taken when handling ethylene, especially during the gasification process.

[0003] Traditional ethylene gas supply processes utilize a single manual pressure regulating valve installed on the pipeline system to adjust the required inlet pressure based on the pressure inside the ethylene cylinder. Because the cylinder pressure continuously decreases during use, constant manual pressure adjustment is necessary, potentially leading to pressure instability. Therefore, a three-stage pressure regulating device for ethylene systems is required. Equipped with three stages of pressure regulation, this device normally reduces pressure drop at each stage, minimizing pressure drop and frost formation on heat-absorbing pipes. This ensures stable pressure and eliminates the need for frequent manual adjustments. Utility Model Content

[0004] The purpose of this invention is to provide a three-stage pressure regulating device for an ethylene system. The device is equipped with three-stage pressure regulation, which normally involves progressively reducing pressure. This progressive pressure reduction can reduce the pressure difference at each stage, alleviate the frost formation on the heat absorption pipes, stabilize the pressure, and eliminate the need for frequent manual pressure adjustment, thereby solving the technical problems mentioned in the background art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A three-stage pressure regulating device for an ethylene system includes three straight pipes: a pressure reducing valve, a safety valve, and a manual venting valve are sequentially connected to the surface of the straight pipes; a vertical pipe is connected to the surface of the straight pipes; a housing first and a housing second are provided on the surface of the straight pipes; lugs are welded to the surface of both housing first and housing second; a bolt rod is threaded through the inner cavity of the lug; a nut block is threaded onto the surface of the bolt rod; a door frame is welded to the surface of housing second; a door is rotatably connected to the surface of the door frame via a hinge; an ethylene sensor is fixedly connected to the inner wall of housing second via bolts; a controller and an alarm light are fixedly installed on the top of housing first via bolts.

[0006] Preferably, both the first and second housing shells are fitted with sealing rings and sealing rings.

[0007] Preferably, a tempered glass block is fixedly installed on the inner wall of the door.

[0008] Preferably, the surface of the door frame is integrally formed with protrusions, and the surface of the door is provided with grooves that match the protrusions.

[0009] Preferably, the ethylene sensor and the warning light are both electrically connected to the controller via wires.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model achieves segmented pressure reduction by installing pressure-reducing valves on straight pipes, allowing for the installation of multiple pressure-reducing valves in series on the ethylene outlet pipeline. The first segment reduces the high pressure (8MPa) to medium pressure (2MPa), the second segment to low pressure (0.3MPa), and the third segment to micro pressure (0.15MPa). Each pressure reduction segment is equipped with a safety valve and a manual venting valve to ensure the safety and ease of maintenance of each pipeline segment. Simultaneously, an ethylene sensor detects leakage on the outside of multiple valves, and the controller can control the flashing of warning lights to further ensure pipeline safety. This achieves the goal of equipping the pipeline with three-stage pressure regulation. Under normal circumstances, the pressure is reduced step by step, which reduces the pressure difference at each pressure reduction stage, alleviates the frost formation on the heat absorption pipeline due to pressure drop, stabilizes the pressure, and eliminates the need for frequent manual pressure adjustment.

[0012] 2. This utility model uses the combination of sealing ring and sealing ring to seal the splicing installation of box shell one and box shell two, avoiding the occurrence of gaps at the connection between the two, thereby improving the sealing performance of the splicing.

[0013] 3. The tempered glass block in this utility model facilitates the observation of each valve, improves the convenience of maintenance, and reduces the number of times the cabinet door is opened and closed.

[0014] 4. This utility model increases the contact area between the door frame and the door when they are closed by using the combination of protrusions and grooves, thereby improving the stability of the connection when they are closed. Attached Figure Description

[0015] in:

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0017] Figure 2 This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0018] Figure 3 This is one embodiment of the present utility model. Figure 1 A magnified view of point B in the middle;

[0019] Figure 4 This is a three-dimensional schematic diagram of the lug and bolt rod according to one embodiment of the present invention.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Straight pipe, 2. Pressure reducing valve, 3. Safety valve, 4. Manual vent valve, 5. Vertical pipe, 6. Housing 1, 7. Housing 2, 8. Sealing ring, 9. Sealing ring, 10. Ear block, 11. Bolt rod, 12. Nut block, 13. Door frame, 14. Door, 15. Tempered glass block, 16. Protrusion, 17. Groove, 18. Ethylene sensor, 19. Controller, 20. Warning light. Detailed Implementation

[0022] In the following description, embodiments of the three-stage pressure regulating device for an ethylene system according to the present invention will be described with reference to the accompanying drawings.

[0023] Example 1:

[0024] Figure 1-4 This invention illustrates a three-stage pressure regulating device for an ethylene system according to an embodiment of the present invention. It includes three straight pipes 1: a pressure reducing valve 2, a safety valve 3, and a manual vent valve 4 are sequentially connected to the surface of each straight pipe 1; a vertical pipe 5 is connected to the surface of each straight pipe 1; a first housing 6 and a second housing 7 are mounted on the surface of each straight pipe 1; sealing rings 8 and 9 are adhered to the surfaces of both housings 6 and 7. The cooperation of the sealing rings 8 and 9 seals the joint between housings 6 and 7, preventing gaps at the connection and improving the sealing performance. The surfaces of housings 6 and 7 are welded... There is an ear block 10, and a bolt rod 11 is installed through the inner cavity of the ear block 10. A nut block 12 is threadedly connected to the surface of the bolt rod 11. A door frame 13 is welded to the surface of the second housing 7. A door 14 is rotatably connected to the surface of the door frame 13 via a hinge. A tempered glass block 15 is fixedly installed on the inner wall of the door 14. The tempered glass block 15 facilitates the observation of each valve, improves the convenience of maintenance, and reduces the number of times the door 14 is opened and closed. An ethylene sensor 18 is fixedly connected to the inner wall of the second housing 7 via bolts. A controller 19 and an alarm light 20 are fixedly installed on the top of the first housing 6 via bolts.

[0025] Example 2:

[0026] Figure 1-4This invention illustrates a three-stage pressure regulating device for an ethylene system according to an embodiment of the present invention. It includes three straight pipes 1: a pressure reducing valve 2, a safety valve 3, and a manual vent valve 4 are sequentially connected to the surface of each straight pipe 1; a vertical pipe 5 is connected to the surface of each straight pipe 1; a housing 6 and a housing 7 are mounted on the surface of each straight pipe 1; lugs 10 are welded to the surfaces of both housing 6 and housing 7; a bolt rod 11 is threaded through the inner cavity of each lug 10; a nut block 12 is threaded onto the surface of the bolt rod 11; a door frame 13 is welded to the surface of housing 7; and a housing is rotatably connected to the surface of the door frame 13 via a hinge. The door 14 and the door frame 13 are integrally formed with protrusions 16. The door 14 is provided with grooves 17 that are adapted to the protrusions 16. The use of the protrusions 16 and grooves 17 increases the contact area when the door frame 13 and the door 14 are closed, thereby improving the stability of the connection when they are closed. The inner wall of the second housing 7 is fixedly connected with an ethylene sensor 18 by bolts. The top of the first housing 6 is fixedly installed with a controller 19 and an alarm light 20 by bolts. The ethylene sensor 18 and the alarm light 20 are both electrically connected to the controller 19 by wires.

[0027] Working Principle: In use, the user installs a pressure reducing valve 2 on the straight pipe 1, resulting in three pressure reducing valves 2 connected in series on the ethylene outlet pipeline for segmented pressure reduction. The first segment reduces the high pressure from 8MPa to medium pressure from 2MPa, the second segment reduces it to low pressure from 0.3MPa, and the third segment reduces it to micro pressure from 0.15MPa. Each pressure reduction segment is equipped with a safety valve 3 and a manual venting valve 4 to ensure the safety of each pipeline segment and ease of maintenance. Furthermore, the use of the lug 10, bolt rod 11, and nut block 12 allows for the reduction of pressure in stages. Box shell 1 6 and box shell 2 7 are fixed to the outside of pressure reducing valve 2, safety valve 3 and manual venting valve 4. Then the box door frame 13 and box door 14 are closed. Leakage detection is performed on the outside of multiple valves by ethylene sensor 18. The warning light 20 can be controlled to flash to warn via controller 19, which further ensures pipeline safety and realizes the three-stage pressure regulation. Under normal circumstances, the three-stage pressure regulation is to reduce pressure step by step. The step-by-step pressure reduction can reduce the pressure difference of each pressure reduction, reduce the frost on the heat absorption pipeline due to pressure drop, stabilize the pressure, and eliminate the need for frequent manual pressure adjustment.

[0028] In summary, this three-stage pressure regulating device for the ethylene system, by installing pressure reducing valves 2 on the straight pipe 1, allows for segmented pressure reduction by connecting three pressure reducing valves 2 in series on the ethylene outlet pipeline. The first stage reduces the high pressure of 8MPa to the medium pressure of 2MPa, the second stage reduces it to the low pressure of 0.3MPa, and the third stage reduces it to the micro pressure of 0.15MPa. Each pressure reduction stage is equipped with a safety valve 3 and a manual venting valve 4 to ensure the safety of each pipeline segment and ease of maintenance. Simultaneously, the ethylene sensor 18 detects leaks on the outside of multiple valves, and the controller 19 controls the warning light 20 to flash as an alarm, further ensuring pipeline safety. This achieves the goal of three-stage pressure regulation, where, under normal circumstances, pressure is reduced step by step. This step-by-step pressure reduction reduces the pressure difference at each reduction stage, mitigating frost formation on the heat-absorbing pipeline due to pressure drop, resulting in stable pressure and eliminating the need for frequent manual pressure adjustments.

Claims

1. A three-stage pressure regulating device for an ethylene system, characterized in that, It includes three straight pipes (1): the surface of the straight pipe (1) is connected in sequence to a pressure reducing valve (2), a safety valve (3) and a manual venting valve (4), the surface of the straight pipe (1) is connected to a vertical pipe (5), the surface of the straight pipe (1) is provided with a first box shell (6) and a second box shell (7), the surfaces of the first box shell (6) and the second box shell (7) are both welded with lugs (10), the inner cavity of the lugs (10) is provided with a bolt rod (11), the surface of the bolt rod (11) is threaded with a nut block (12), the surface of the second box shell (7) is welded with a door frame (13), the surface of the door frame (13) is rotatably connected with a door (14) by a hinge, the inner wall of the second box shell (7) is fixedly connected with an ethylene sensor (18) by bolts, and the top of the first box shell (6) is fixedly installed with a controller (19) and an alarm light (20) by bolts.

2. The three-stage pressure regulating device for an ethylene system according to claim 1, characterized in that, Both the first (6) and the second (7) of the box shell are covered with sealing rings (8) and sealing rings (9).

3. The three-stage pressure regulating device for an ethylene system according to claim 2, characterized in that, A tempered glass block (15) is fixedly installed on the inner wall of the box door (14).

4. The three-stage pressure regulating device for an ethylene system according to claim 3, characterized in that, The surface of the box door frame (13) is integrally formed with protrusions (16), and the surface of the box door (14) is provided with grooves (17) that are adapted to the protrusions (16).

5. A three-stage pressure regulating device for an ethylene system according to claim 4, characterized in that, The ethylene sensor (18) and the warning light (20) are both electrically connected to the controller (19) via wires.

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