A remote pressure regulating device with internal leakage prevention

Abstract

The utility model relates to a kind of anti-leakage remote regulating pressure relief device, including gas pipe, and the exhaust pipe of production equipment is connected to one end of gas pipe, and the other end of gas pipe is communicated to incineration cabinet, and manually valve, regulating valve, cut-off ball valve and auxiliary pressure relief component are also sequentially arranged on gas pipe, and regulating valve, cut-off ball valve and auxiliary pressure relief component are equipped with controller;The application realizes rapid cutting airflow by cut-off ball valve, cooperates the multistage sealing structure of auxiliary pressure relief component, effectively prevents medium leakage, and the structure also has intelligent regulating capacity, can be quickly relieved according to the air pressure collected by air pressure sensor, auxiliary pressure relief component is relieved by branch pipe to realize bypass, ensure that system completes pressure regulation within 3 seconds, so that safety redundancy and emergency handling capacity are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical production equipment technology, specifically to a remote pressure relief device for preventing internal leakage. Background Technology

[0002] In petrochemical production, the transportation and handling of high-temperature, high-pressure, flammable, explosive, and corrosive media are core processes. The stable control and safe pressure relief of the system pressure directly affect the continuity of production and the safe operation of equipment. Petrochemical production is characterized by complex media composition (such as corrosive gases containing sulfur and chlorine), harsh operating conditions (large pressure fluctuation range, often ranging from 0.1-10 MPa or even higher), and high leakage risk (even a small leak can cause explosions, poisoning, or environmental pollution). These characteristics place extremely high demands on the sealing, reliability, and response speed of pressure regulating devices.

[0003] Traditional pressure relief devices mostly employ a single valve for manual adjustment or a mechanical pressure relief structure, which has three major drawbacks: First, insufficient sealing performance, which easily leads to internal leakage due to medium corrosion and mechanical wear after long-term use. Especially in scenarios with frequent switching between high and low pressure, the aging rate of seals accelerates, and the risk of leakage increases exponentially. Second, low adjustment precision, making it difficult to adapt to the "dynamic pressure fluctuations" required in petrochemical production. Excessive pressure relief may result in raw material waste, while insufficient pressure relief may cause equipment overpressure damage. Third, reliance on manual on-site operation not only increases the risk of operator exposure to hazardous environments but also results in a delayed response (the time difference from pressure anomaly to manual intervention often exceeds 30 seconds), making it difficult to meet the rapid pressure relief requirements in emergency situations. Furthermore, as the petrochemical industry upgrades towards intelligent and unmanned operations, traditional equipment lacks remote monitoring and integrated control capabilities, making it impossible to connect to the plant's DCS (Distributed Control System) for overall management. This results in severe data silos and makes it difficult to establish a coordinated protection mechanism with upstream and downstream equipment. Against the backdrop of increasingly stringent environmental regulations, the problem of excessive volatile organic compound (VOC) emissions caused by internal leaks has also become a key bottleneck restricting enterprises from compliant production. Therefore, given the unique characteristics of pressure control in petrochemical production and the technical shortcomings of traditional equipment, developing pressure relief devices with functions such as preventing internal leakage, remote precise adjustment, and intelligent linkage has become a core technological direction for resolving the contradiction between production safety and efficiency. Utility Model Content

[0004] Based on the above description, this utility model provides a remote pressure relief device to prevent internal leakage, thereby solving the shortcomings of existing remote control venting valves, which have low sealing levels, are prone to internal leakage, and cause waste of raw materials during normal production, thus increasing production costs.

[0005] This utility model is achieved through the following technical solution: A remote-controlled pressure relief device for preventing internal leakage includes a gas supply pipe. One end of the gas supply pipe is connected to the exhaust pipe of the production equipment, and the other end of the gas supply pipe is connected to the incinerator. A manual valve, a regulating valve, a shut-off ball valve, and an auxiliary pressure relief assembly are arranged sequentially on the gas supply pipe. Two manual valves are provided and are respectively located at the connection points of the gas supply pipe with the exhaust pipe and the incinerator. The regulating valve is located in front of the shut-off ball valve and is kept at a distance from the shut-off ball valve. The auxiliary pressure relief assembly is located between the regulating valve and the shut-off ball valve. The regulating valve, the shut-off ball valve, and the auxiliary pressure relief assembly are all equipped with controllers.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the auxiliary pressure relief assembly includes a rectangular housing with a through hole on the end face of the housing and a flange that communicates with the gas supply pipe. The outer wall of the housing is also provided with multiple branch pipes, one end of which extends into the housing and communicates with the through hole, and the other end of which extends backward and communicates with the gas supply pipe.

[0008] Furthermore, a sealing groove is provided on the inner wall of the through hole, and the opening formed by the branch pipe connected to the through hole is located on the bottom surface of the sealing groove. An adjusting ring is also movably installed inside the sealing groove, and the two sides of the adjusting ring are sealed by O-rings.

[0009] Furthermore, multiple vent holes are provided through the inner wall of the adjusting ring, and a positioning groove is provided between every two adjacent vent holes. An airbag is provided in the positioning groove, and multiple airbags are interconnected and connected to an air pump through an air pipe. The outward-facing side of the airbag is also provided with a corrugated protrusion that fits tightly against the inner wall of the through hole.

[0010] Furthermore, a worm gear tooth is provided on the outer side wall of one end of the adjusting ring, a worm is rotatably installed inside the housing, the worm meshes with the worm gear tooth, and a servo motor is provided on the outer side wall of the housing, the output end of the servo motor is connected to one end of the worm.

[0011] Furthermore, the gas supply pipe is also equipped with a pressure sensor. Multiple pressure sensors are installed at both ends of the gas supply pipe to detect the input pressure and the exhaust pressure.

[0012] Furthermore, the controller is a DCS controller. Multiple controllers are remotely connected to an external control center.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This application improves upon existing pressure relief devices by using a shut-off ball valve to quickly cut off airflow. Combined with a multi-stage sealing structure in the auxiliary pressure relief assembly, it effectively prevents internal leakage of the medium, improving sealing performance by over 80% compared to traditional regulating valves. Furthermore, this structure possesses intelligent adjustment capabilities, allowing for rapid pressure relief based on pressure data collected by a pressure sensor, especially in emergency situations. The shut-off ball valve closes quickly, and the auxiliary pressure relief assembly bypasses pressure through a branch pipe, ensuring the system completes pressure regulation within 3 seconds, effectively enhancing safety redundancy and emergency response capabilities. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the pressure relief device in this embodiment; Figure 2 This is a schematic diagram of the control structure of the entire pressure relief device in this embodiment; Figure 3 This is a schematic diagram of the auxiliary pressure relief component in this embodiment; Figure 4 This is a schematic diagram of the adjusting ring in this embodiment; The components include: 1. Gas supply pipe; 2. Manual valve; 3. Regulating valve; 4. Shut-off ball valve; 5. Auxiliary pressure relief assembly; 51. Housing; 52. Through hole; 53. Sealing groove; 54. Branch pipe; 55. Adjusting ring; 56. Worm gear; 57. Servo motor; 58. Positioning groove; 59. Airbag body; 6. Air pump; 7. Air pressure sensor. Detailed Implementation

[0015] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0017] Combination Figure 1-4 As shown, a remote-controlled pressure relief device for preventing internal leakage includes: An exhaust pipe is installed on the production equipment to help expel air from inside the equipment, thereby reducing and regulating pressure. An incinerator is installed on one side of the production equipment to purify the exhaust air by incineration. Gas supply pipe 1 is located between the exhaust pipe and the incinerator to assist in the supply of air inside the production equipment, while cutting off the connection between the two during production.

[0018] Specifically, a manual valve 2, a regulating valve 3, a shut-off ball valve 4, and an auxiliary pressure relief assembly 5 are arranged sequentially on the gas supply pipe 1. There are two manual valves 2, which are located at both ends of the gas supply pipe 1, respectively, to cut off the connection between the exhaust pipe and the incinerator by manual control in special circumstances.

[0019] The regulating valve 3 and the shut-off ball valve 4 are both located between the two manual valves 2. The regulating valve 3 is arranged closer to the exhaust pipe, while the shut-off ball valve 4 is arranged closer to the incinerator. The auxiliary pressure relief assembly 5 is located between the regulating valve 3 and the shut-off ball valve 4.

[0020] The regulating valve 3 is an intelligent electric valve, such as the HTS series intelligent regulating valve 3; in addition, the shut-off ball valve 4 is preferably a ZDRR type electric O-type shut-off ball valve 4, which is used to cooperate with the regulating valve 3 to achieve multi-stage sealing and ensure that the medium will not easily leak.

[0021] The auxiliary pressure relief assembly 5 includes a rectangular housing 51, which is divided into two parts and fixed by bolts. Both housing parts 51 have through holes 52 on their end faces, and their outward-facing sides are connected to the gas supply pipe 1 through flanges. The opposite sides of the two parts are provided with sealing grooves 53. An adjusting ring 55 is provided in the sealing groove 53. The two end faces of the adjusting ring 55 are respectively sealed with the sealing groove 53 by O-rings, or a bearing sealing structure can be used directly to replace it, so as to ensure that the adjusting ring 55 can maintain a sealing state while rotating flexibly.

[0022] In addition, multiple branch pipes 54 are provided on the outer wall of the housing 51. All branch pipes 54 extend into the housing 51 and communicate with each other. The opening formed inside the through hole 52 is located on the bottom surface of the sealing groove 53, and the adjusting ring 55 covers it. The other end of the branch pipe 54 extends rearward and communicates with the gas supply pipe 1, and the connection is located in front of the shut-off ball valve 4.

[0023] In order for the regulating ring 55 to cooperate with these branch pipes 54 to form an auxiliary pressure relief, a vent hole should be provided through the side wall of the regulating ring 55. The vent hole is the same size as the opening, and the vent hole is aligned with the opening by rotating the regulating ring 55.

[0024] Furthermore, to facilitate adjustment of the adjusting ring 55, a locking function is required to prevent the vent hole of the adjusting ring 55 from failing to align with the opening due to external vibration or reverse thrust. A worm gear tooth should be provided on the outer ring surface of one end of the adjusting ring 55, with a worm 56 vertically mounted on one side of the worm gear tooth. The worm 56 meshes with the worm gear tooth, and one end of the worm 56 extends to the outside of the housing 51. A servo motor 57 is also provided on the surface of the housing 51 and is connected to the worm 56. Thus, the transmission method of the worm gear 56 is used to control the forward or reverse rotation of the adjusting ring 55, thereby controlling the on / off state of the branch pipe 54.

[0025] In order to prevent gas from entering the positioning groove 58 through the vent hole due to the fit clearance and causing pressure loss, a positioning groove should be set on the surface of the adjusting ring 55. The positioning groove is arranged between the two vent holes, and each positioning groove is equipped with an air bladder 59. Multiple air bladders 59 are interconnected and connected to the air pump 6 through an air pipe. At the same time, the surface of the air bladder 59 should be provided with corrugated protrusions, so as to use expansion to squeeze it against the inner wall of the sealing groove 53, thereby enhancing the sealing performance of the entire auxiliary pressure relief structure.

[0026] At both ends of the gas supply pipe 1, there are also pressure sensors 7. The pressure sensors 7 are preferably Rosemount 3051 series sensors. Their purpose is to detect changes in gas pressure at both ends so that the entire equipment can make corresponding adjustments automatically. For example, when the pressure sensor 7 on the side closer to the exhaust pipe detects that the gas pressure is increasing, it can open the auxiliary pressure relief component 5 so that it can work with the bypass branch pipe 54 to achieve rapid pressure relief and ensure that the system completes pressure regulation within 3 seconds. The pressure sensor 7 on the side closer to the incinerator is used to detect whether a leak occurs when the entire pressure relief device is cut off, so as to alert the staff through warning devices (warning lights, buzzers, etc.).

[0027] To effectively coordinate with the aforementioned pressure sensor 7 and achieve intelligent control, controllers should also be provided for the regulating valve 3, the shut-off ball valve 4, the servo motor 57, and the air pump 6. These controllers should be configured as DCS controllers (distributed control systems), such as Honeywell's Experion PKS C300 controller. Multiple controllers should be combined and installed with each component, and then integrated with the TPS system to achieve unified control of the entire equipment. This allows staff to pre-set programs, enabling the aforementioned pressure relief device to automatically adjust the opening and closing of auxiliary pipelines according to the air pressure and the actual pressure relief status. Staff do not need to approach the air supply pipe 1, effectively improving equipment safety redundancy and emergency handling capabilities.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A remote-controlled pressure relief device for preventing internal leakage, characterized in that, The system includes a gas supply pipe (1), one end of which is connected to the exhaust pipe of the production equipment, and the other end of which is connected to the incinerator. The gas supply pipe (1) is also provided with a manual valve (2), a regulating valve (3), a shut-off ball valve (4), and an auxiliary pressure relief assembly (5) in sequence. The manual valve (2) is provided in two places and is located at the connection between the gas supply pipe (1) and the exhaust pipe and the incinerator, respectively. The regulating valve (3) is located in front of the shut-off ball valve (4) and is kept at a distance from the shut-off ball valve (4). The auxiliary pressure relief assembly (5) is located in the middle of the regulating valve (3) and the shut-off ball valve (4). The regulating valve (3), the shut-off ball valve (4), and the auxiliary pressure relief assembly (5) are all equipped with controllers.

2. The anti-internal leakage remote regulating pressure relief device according to claim 1, characterized in that, The auxiliary pressure relief assembly (5) includes a rectangular housing (51). A through hole (52) is provided on the end face of the housing (51) and is connected to the gas supply pipe (1) through a flange. Multiple branch pipes (54) are also provided on the outer wall of the housing (51). One end of the multiple branch pipes (54) extends into the housing (51) and is connected to the through hole (52). The other end of the multiple branch pipes (54) extends backward and is connected to the gas supply pipe (1).

3. The anti-internal leakage remote adjustable pressure relief device according to claim 2, characterized in that, A sealing groove (53) is also provided on the inner wall of the through hole (52). The branch pipe (54) is connected to the opening formed by the through hole (52) and is located on the bottom surface of the sealing groove (53). An adjusting ring (55) is also movably installed inside the sealing groove (53). The two sides of the adjusting ring (55) are sealed by O-rings.

4. The anti-internal leakage remote regulating pressure relief device according to claim 3, characterized in that, Multiple vent holes are also provided through the inner wall of the adjusting ring (55). A positioning groove (58) is provided between every two adjacent vent holes. An airbag (59) is provided in the positioning groove (58). Multiple airbags (59) are interconnected and connected to the air pump (6) through an air pipe. The outward side of the airbag (59) is also provided with a corrugated protrusion that fits tightly against the inner wall of the through hole (52).

5. The anti-internal leakage remote adjustable pressure relief device according to claim 4, characterized in that, The outer side wall of one end of the adjusting ring (55) is also provided with worm gear teeth. A worm (56) is rotatably installed inside the housing (51). The worm (56) is engaged with the worm gear teeth. A servo motor (57) is also provided on the outer side wall of the housing (51). The output end of the servo motor (57) is connected to one end of the worm (56).

6. The anti-internal leakage remote adjustable pressure relief device according to claim 5, characterized in that, The gas supply pipe (1) is also equipped with a pressure sensor (7). Multiple pressure sensors (7) are provided and installed at both ends of the gas supply pipe (1) to detect the input pressure and the exhaust pressure.

7. The anti-internal leakage remote regulating pressure relief device according to claim 1, characterized in that, The controller is a DCS controller, and multiple controllers are remotely connected to an external control center.

Images