Emergency pressure relief device with adjustable pressure

Abstract

The invention provides a pressure-adjustable emergency pressure relief device, and relates to the technical field of chemical pressure relief equipment.The pressure-adjustable emergency pressure relief device comprises an adjusting pipe, the adjusting pipe is fixedly installed on the upper end face of a pressure relief valve body, four feeding ports are annularly formed in the surface of a bottom plate of the adjusting pipe, a drainage pipe is fixedly installed outside the adjusting pipe, and a valve is installed inside the drainage pipe; in the invention, when the pressure of the system is abnormally increased and the pressing plate is jacked up, the pressure sensor captures a pressure mutation signal in real time and transmits the signal to the controller, the controller triggers the alarm to give out a sound-light alarm, and the signal transmitter detects the flow and temperature of a pressure relief medium through the detection rod and synchronously transmits an overpressure signal to the monitoring system remotely. According to the invention, local and remote dual early warning effects are realized, and the problems of insufficient pressure adjustment flexibility, difficulty in adapting to complex and changeable industrial scenes, lack of real-time pressure monitoring and active early warning capabilities, difficulty in timely taking emergency measures and hysteresis are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical pressure relief equipment, and in particular to an emergency pressure relief device with adjustable pressure. Background Art

[0002] In industrial fields such as chemical, petroleum, and energy, high-pressure fluid transportation systems are prone to abnormal increases in system pressure during operation due to factors such as equipment failure, operational errors, and changes in medium characteristics. If the pressure exceeds the rated pressure limit of the equipment or pipeline, it may cause serious safety accidents such as explosions and leaks, which will not only cause equipment damage and production interruptions, but may also lead to the spread of toxic and harmful media, threatening the surrounding environment and people's lives.

[0003] Therefore, as a key component to ensure the safe operation of high-pressure systems, the performance of emergency pressure relief devices is directly related to the safety and stability of industrial production. However, existing emergency pressure relief devices still have some shortcomings in use: First, pressure regulation lacks flexibility. The pressure relief thresholds of traditional safety valves are often preset at the factory. Adjusting the thresholds based on system operating conditions often requires disassembling the device and replacing springs of different stiffnesses. This operation is cumbersome and time-consuming, making it difficult to adapt to complex and changing industrial scenarios. This is especially true for production systems that require frequent adjustments to pressure parameters. Secondly, most traditional pressure relief devices can only achieve pressure relief functions through mechanical structures and lack real-time pressure monitoring and active early warning capabilities. When the system is overpressured, operators can often only discover the problem by observing the pressure gauge or abnormal status of the equipment on site. It is difficult to take emergency measures in time and there is a lag. At the same time, for unmanned remote sites, the real-time transmission of overpressure information cannot be achieved, and the best time for disposal is easily missed. Summary of the Invention

[0004] The present invention relates to a pressure-adjustable emergency pressure relief device to solve the problem of insufficient flexibility in pressure regulation. The pressure relief pressure thresholds of traditional safety valves are mostly preset at the factory, which makes it difficult to adapt to complex and changeable industrial scenarios. In addition, the device lacks real-time pressure monitoring and active early warning capabilities, making it difficult to take emergency measures in a timely manner and causing hysteresis problems.

[0005] The present invention provides an emergency pressure relief device with adjustable pressure, which specifically comprises: a pressure relief valve body; The middle part of the pressure relief valve body is a cylindrical structure, the left and right end parts of the pressure relief valve body are truncated cone structures, and a connecting flange is installed on the left and right ends of the pressure relief valve body respectively; A regulating pipe, the regulating pipe is fixedly mounted on the upper end surface of the pressure relief valve body, the bottom plate surface of the regulating pipe is annularly provided with four feed ports, a drainage pipe is fixedly mounted on the outside of the regulating pipe, and a valve is mounted inside the drainage pipe; The adjusting plate has a circular plate structure, and the adjusting plate is slidably mounted inside the adjusting tube. The outer end surface of the adjusting plate is in contact with the inner wall of the adjusting tube, and a through hole is provided in the middle of the adjusting plate. A pressure plate is located inside the regulating tube, with the lower end surface of the pressure plate in contact with the bottom plate of the regulating tube, and a connecting rod is welded to the upper end surface of the pressure plate. The connecting rod is slidably mounted in a through hole on the surface of the regulating plate, and a pressure sensor is provided in the middle of the lower end surface of the pressure plate; An adjusting screw, wherein a push plate is fixedly mounted on the lower end surface of the adjusting screw and a turntable is fixedly mounted on the upper end surface of the adjusting screw; The controller is installed on the upper end surface of the turntable and is electrically connected to the pressure sensor at the lower end of the pressure plate.

[0006] Furthermore, a pressure gauge is installed on the upper end surface of the controller, and an alarm is fixedly installed on the upper end surface of the turntable, and the alarm is electrically connected to the controller.

[0007] Furthermore, a signal transmitter is fixedly mounted on the outer end surface of the drainage tube, a detection rod is fixedly mounted on the lower end surface of the signal transmitter, a sensor is mounted on the end of the detection rod, and the detection rod is located inside the drainage tube.

[0008] Furthermore, a cover plate is provided on the upper end surface of the adjusting tube, the cover plate and the adjusting tube are connected by bolts, and the cover plate is threadedly connected to the adjusting screw.

[0009] Furthermore, the upper end portion of the connecting rod is slidably mounted in the through groove inside the adjusting screw, the outer end surface of the connecting rod is provided with four annular grooves, and the inner wall of the through hole is provided with four limiting strips in a ring shape, and the four limiting strips are respectively engaged in the four grooves.

[0010] Furthermore, a connecting spring is sleeved on the outside of the connecting rod, and the connecting spring is located between the adjusting plate and the pressing plate.

[0011] Furthermore, six pull rods are installed on the outer end surface of the turntable, and the six pull rods are arranged in a ring structure.

[0012] Furthermore, rubber strips are evenly installed on the outer end surfaces of the left and right ends of the pressure relief valve body, and the outer end surfaces of the rubber strips are arc-shaped structures.

[0013] The present invention provides an emergency pressure relief device with adjustable pressure, which has the following beneficial effects: 1. An adjusting tube is installed on the upper end face of the pressure relief valve body. A pressure plate and an adjusting plate are provided inside the adjusting tube, and a connecting spring is provided between the pressure plate and the adjusting plate. Under the action of the elastic force of the connecting spring, the pressure plate can fit tightly with the bottom plate of the adjusting tube, and the pressure plate can block the four feed ports at the lower end of the adjusting tube. When the air pressure inside the pressure relief valve body does not exceed the set threshold, the gas will not enter the adjusting tube from the feed port. When the air pressure inside the pressure relief valve body is too high, the airflow inside the pressure relief valve body will push the pressure plate open, and the gas will enter the adjusting tube through the feed port and be discharged from the drainage pipe, thereby reducing the pressure inside the pipeline.

[0014] 2. The threaded connection between the cover plate and the adjusting screw allows workers to rotate the adjusting screw by rotating the turntable. Pull rods are evenly welded on the outer end surface of the turntable to facilitate workers to apply force. The adjusting screw and the push plate will move downward at the same time. During this process, the adjusting plate will also move downward, compressing the connecting spring. This increases the air pressure threshold that the pressure relief valve body can withstand. That is, the greater the compression of the connecting spring, the higher the medium pressure required to trigger the pressure relief. The cooperation of the limit strip and the slot limits the radial rotation of the connecting rod to ensure that the spring is evenly stressed.

[0015] 3. A pressure sensor is installed in the middle of the lower end surface of the pressure plate, which can monitor the pressure value corresponding to the preload of the connecting spring in real time, convert it into an electrical signal through the controller, and display it intuitively on the pressure gauge, avoiding the blindness of traditional purely mechanical adjustment. When the system pressure rises abnormally and the medium pressure is greater than the preload of the connecting spring, the pressure plate is pushed upward, and the pressure sensor captures the pressure mutation signal in real time and transmits it to the controller. The controller triggers the alarm to emit an audible and visual alarm. The signal transmitter detects the flow and temperature of the pressure relief medium through the detection rod, and simultaneously transmits the overpressure signal remotely to the monitoring system to achieve local and remote dual early warning effects.

[0016] 4. After the pressure plate moves up, the connecting rod slides and is clamped in the internal groove of the adjusting screw, so that the pressure plate and the connecting rod can move up synchronously, and a channel is formed between the feed port and the pressure plate. The medium enters the drainage pipe through the adjusting tube and is quickly discharged, reducing the system pressure. When the system pressure drops below the set threshold, the elastic force of the connecting spring pushes the pressure plate down, reseals the feed port, stops pressure relief, and the connecting rod resets along the groove. The guiding effect of the limit strip and the card slot ensures that the pressure plate returns to its original position accurately to avoid continuous leakage of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0018] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached figure: Figure 1 Shows a schematic diagram of the overall structure of the device of the present invention; Figure 2 A schematic diagram of the connection structure between the pressure relief valve body and the regulating pipe of the present invention is shown; Figure 3 A front view schematic diagram of the internal structure of the regulating tube of the present invention is shown; Figure 4 A schematic cross-sectional view of the regulating tube of the present invention is shown; Figure 5 It shows a schematic diagram of the structure of the pressing plate, connecting rod and adjusting screw of the present invention; Figure 6 A schematic diagram of the exploded structure of the adjustment plate and the connecting rod of the present invention is shown; Figure 7 A schematic diagram of the exploded structure of the adjusting screw and the cover plate of the present invention is shown; Figure 8 It shows a schematic structural diagram of the pressure relief valve body and the rubber strip of the present invention.

[0020] List of reference numerals: 1. Pressure relief valve body; 101. Connecting flange; 102. Rubber strip; 2. Adjusting tube; 201. Feed inlet; 202. Drainage tube; 2021. Valve; 203. Cover plate; 3. Signal transmitter; 301. Detection rod; 4. Adjusting plate; 401. Through hole; 4011. Limiting strip; 5. Pressing plate; 501. Pressure sensor; 502. Connecting rod; 5021. Slot; 6. Connecting spring; 7. Adjusting screw; 701. Through slot; 702. Turntable; 7021. Pull rod; 703. Push plate; 8. Controller; 801. Pressure gauge; 9. Alarm. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 8 : The present invention provides an emergency pressure relief device with adjustable pressure, comprising: a pressure relief valve body 1; The middle part of the pressure relief valve body 1 is a cylindrical structure, and the left and right ends of the pressure relief valve body 1 are truncated cone structures. A connecting flange 101 is installed on the left and right ends of the pressure relief valve body 1 respectively. The regulating pipe 2 is fixedly mounted on the upper end surface of the pressure relief valve body 1. The bottom plate surface of the regulating pipe 2 is annularly provided with four feed ports 201. A drainage pipe 202 is fixedly mounted on the outside of the regulating pipe 2. A valve 2021 is mounted inside the drainage pipe 202. The adjusting plate 4 has a circular plate structure. The adjusting plate 4 is slidably mounted inside the adjusting tube 2. The outer end surface of the adjusting plate 4 fits in contact with the inner wall of the adjusting tube 2. A through hole 401 is provided in the middle of the adjusting plate 4. The pressing plate 5 is located inside the regulating tube 2. The lower end surface of the pressing plate 5 is in contact with the bottom plate of the regulating tube 2. A connecting rod 502 is welded to the upper end surface of the pressing plate 5. The connecting rod 502 is slidably mounted in the through hole 401 on the surface of the regulating plate 4. A pressure sensor 501 is provided in the middle of the lower end surface of the pressing plate 5. An adjusting screw 7, a push plate 703 is fixedly mounted on the lower end surface of the adjusting screw 7, and a rotary disk 702 is fixedly mounted on the upper end surface of the adjusting screw 7; The controller 8 is installed on the upper end surface of the turntable 702 , and the controller 8 is electrically connected to the pressure sensor 501 at the lower end of the pressing plate 5 .

[0023] Among them, a pressure gauge 801 is installed on the upper end face of the controller 8, and an alarm 9 is fixedly installed on the upper end face of the turntable 702. The alarm 9 is electrically connected to the controller 8. A signal transmitter 3 is fixedly installed on the outer end face of the drainage tube 202, and a detection rod 301 is fixedly installed on the lower end face of the signal transmitter 3. A sensor is installed at the end of the detection rod 301. The detection rod 301 is located inside the drainage tube 202. During use, when the system pressure rises abnormally and the medium pressure is greater than the preload force of the connecting spring 6, the pressure plate 5 is pushed upward, and the pressure sensor 501 captures the pressure mutation signal in real time and transmits it to the controller 8. The controller 8 triggers the alarm 9 to emit an audible and visual alarm. The signal transmitter 3 detects the flow and temperature of the pressure relief medium through the detection rod 301, and simultaneously transmits the overpressure signal remotely to the monitoring system, thereby achieving a dual local and remote early warning effect.

[0024] Among them, the upper end face of the adjusting tube 2 is provided with a cover plate 203, the cover plate 203 is connected to the adjusting tube 2 by bolts, and the cover plate 203 is threadedly connected to the adjusting screw 7. During use, the threaded connection between the cover plate 203 and the adjusting screw 7 allows workers to drive the adjusting screw 7 to rotate by rotating the turntable 702. The outer end face of the turntable 702 is evenly welded with pull rods 7021, which is convenient for workers to apply force. The adjusting screw 7 and the push plate 703 will move downward at the same time. During this process, the adjusting plate 4 will also move downward to compress the connecting spring 6, thereby increasing the air pressure threshold that the pressure relief valve body 1 can withstand.

[0025] Among them, the upper end part of the connecting rod 502 is slidably mounted in the through groove 701 inside the adjusting screw 7, and the outer end surface of the connecting rod 502 is provided with four grooves 5021 in a ring shape, and the inner wall of the through hole 401 is provided with four limit bars 4011 in a ring shape, and the four limit bars 4011 are respectively engaged in the four grooves 5021. During use, when the connecting rod 502 moves up and down along the through groove 701, the limit bar 4011 is engaged in the groove 5021, so that the limit bar 4011 can play a limiting role to prevent the connecting rod 502 from swinging left and right.

[0026] Among them, the outside of the connecting rod 502 is sleeved with a connecting spring 6, and the connecting spring 6 is located between the adjusting plate 4 and the pressure plate 5. During use, under the action of the elastic force of the connecting spring 6, the pressure plate 5 can fit tightly with the bottom plate of the adjusting tube 2, and the pressure plate 5 can block the four feed ports 201 at the lower end of the adjusting tube 2. When the air pressure inside the pressure relief valve body 1 does not exceed the set threshold, the gas will not enter the regulating tube 2 from the feed port 201. When the air pressure inside the pressure relief valve body 1 is too high, the airflow inside the pressure relief valve body 1 will push the pressure plate 5 open, and the corresponding gas will enter the regulating tube 2 through the feed port 201 and be discharged from the drainage tube 202, thereby reducing the internal pressure of the pipeline.

[0027] Among them, six pull rods 7021 are installed on the outer end surface of the turntable 702, and the six pull rods 7021 are arranged in a ring structure. Rubber strips 102 are evenly installed on the outer end surfaces of the left and right ends of the pressure relief valve body 1. The outer end surface of the rubber strip 102 is an arc structure. When workers assemble the pressure relief valve body 1, the setting of the rubber strip 102 can increase the friction between the workers' hands and the pressure relief valve body 1 to avoid slipping.

[0028] Example 2, based on Example 1, Figures 1-8 As shown, a drainage pipe 202 is installed on the outer end face of the regulating pipe 2. During actual operation, the drainage pipe 202 can be connected to other storage tanks. Chemical raw materials are generally harmful, so the leaked chemical medium can be collected to avoid direct discharge to the outside and pollution to the surrounding environment. A valve 2021 is also installed on the surface of the drainage pipe 202. During the operation of the pressure relief valve body 1, this valve 2021 is in a normally open state, which can ensure that the gas runs smoothly in the pressure relief valve body 1.

[0029] The working principle of this embodiment is as follows: In the present invention, a connecting flange 101 is respectively installed on the left and right ends of the pressure relief valve body 1, so that workers can connect the pressure relief valve body 1 with the chemical pipeline. When the gas inside the pipeline passes through the pressure relief valve body 1, the inside of the pressure relief valve body 1 will be filled with gas and there will be air pressure. A regulating pipe 2 is installed on the upper end face of the pressure relief valve body 1. A pressure plate 5 and an regulating plate 4 are provided inside the regulating pipe 2, and a connecting spring 6 is provided between the pressure plate 5 and the regulating plate 4. Under the action of the elastic force of the connecting spring 6, the pressure plate 5 can fit tightly with the bottom plate of the regulating pipe 2. The pressure plate 5 can block the four feed ports 201 at the lower end of the regulating pipe 2. When the air pressure inside the pressure relief valve body 1 does not exceed the set threshold value, the gas will not enter the regulating pipe 2 from the feed port 201. When the air pressure inside the pressure relief valve body 1 is too high, the airflow inside the pressure relief valve body 1 will push the pressure plate 5 open, and the corresponding gas will enter the regulating pipe 2 through the feed port 201 and be discharged from the drainage pipe 202, thereby reducing the pressure inside the pipeline. When different chemical gases are transported, the conveying limit of the air pressure is also different. The setting of the threaded connection between the cover plate 203 and the adjusting screw 7 allows workers to drive the adjusting screw 7 to rotate by rotating the turntable 702. The outer end surface of the turntable 702 is evenly welded with a pull rod 7021, which is convenient for workers to apply force. The adjusting screw 7 and the push plate 703 will move downward at the same time. In this process, the adjusting plate 4 will also move downward to compress the connecting spring 6, thereby improving the pressure relief valve body 1. The air pressure threshold that is borne, that is, the greater the compression of the connecting spring 6, the higher the medium pressure required to trigger the pressure relief. The cooperation between the limit strip 4011 and the card slot 5021 limits the radial rotation of the connecting rod 502 to ensure that the spring is evenly stressed. A pressure sensor 501 is installed in the middle position of the lower end surface of the pressure plate 5, which can monitor the pressure value corresponding to the preload force of the connecting spring 6 in real time, and convert it into an electrical signal through the controller 8, which is intuitively displayed on the pressure gauge 801, avoiding the blindness of traditional purely mechanical adjustment. When the system medium pressure is transmitted to the regulating pipe 2 through the flow channel of the pressure relief valve body 1, the medium pressure acts on the lower end surface of the pressure plate 5 through the feed port 201, forming a balance with the preload force of the connecting spring 6. If the medium pressure is less than the set threshold, the pressure plate 5 and the bottom plate of the regulating pipe 2 are tightly closed. The feed port 201 is tightly fitted, the medium cannot enter the drainage tube 202, and the device is in a standby state. When the system pressure rises abnormally and the medium pressure is greater than the preload of the connecting spring 6, the pressure plate 5 is pushed upward, and the pressure sensor 501 captures the pressure mutation signal in real time and transmits it to the controller 8. The controller 8 triggers the alarm 9 to sound and light alarms. The signal transmitter 3 detects the flow and temperature of the pressure relief medium through the detection rod 301, and simultaneously transmits the overpressure signal remotely to the monitoring system to achieve local and remote dual early warning effects. After the pressure plate 5 moves up, the connecting rod 502 is slidably mounted in the internal groove 701 of the adjusting screw 7, so that the pressure plate 5 and the connecting rod 502 can move up synchronously, and a channel is formed between the feed port 201 and the pressure plate 5.The medium enters the drainage pipe 202 through the regulating pipe 2 and is quickly discharged, reducing the system pressure. When the system pressure drops below the set threshold, the elastic force of the connecting spring 6 pushes the pressure plate 5 downward, resealing the feed port 201 and stopping the pressure relief. The connecting rod 502 returns along the through groove 701. The guiding effect of the limit bar 4011 and the retaining groove 5021 ensures that the pressure plate 5 returns to its original position accurately, preventing continuous leakage of the medium.

Claims

1. A pressure-adjustable emergency pressure relief device, comprising: A pressure relief valve body (1), wherein the middle portion of the pressure relief valve body (1) is a cylindrical structure, the left and right end portions of the pressure relief valve body (1) are truncated cone structures, and the left and right ends of the pressure relief valve body (1) are respectively provided with a connecting flange (101); characterized in that: a regulating pipe (2), wherein the regulating pipe (2) is fixedly installed on the upper end surface of the pressure relief valve body (1), the bottom plate surface of the regulating pipe (2) is annularly provided with four feed ports (201), a drainage pipe (202) is fixedly installed on the outside of the regulating pipe (2), and a valve (2021) is installed inside the drainage pipe (202); an regulating plate (4), wherein the main body of the regulating plate (4) is a circular plate structure, the regulating plate (4) is slidably mounted inside the regulating pipe (2), the outer end surface of the regulating plate (4) is in contact with the inner wall of the regulating pipe (2), and the regulating plate (4) is in contact with the inner wall of the regulating pipe (2). A through hole (401) is provided in the middle of the plate (4); a pressing plate (5), the pressing plate (5) is located inside the regulating tube (2), the lower end surface of the pressing plate (5) is in contact with the bottom plate of the regulating tube (2), a connecting rod (502) is welded to the upper end surface of the pressing plate (5), the connecting rod (502) is slidably mounted in the through hole (401) on the surface of the regulating plate (4), and a pressure sensor (501) is provided in the middle of the lower end surface of the pressing plate (5); an adjusting screw (7), a push plate (703) is fixedly mounted on the lower end surface of the adjusting screw (7), and a turntable (702) is fixedly mounted on the upper end surface of the adjusting screw (7); a controller (8), the controller (8) is mounted on the upper end surface of the turntable (702), and the controller (8) is electrically connected to the pressure sensor (501) at the lower end of the pressing plate (5).

2. The pressure-adjustable emergency pressure relief device according to claim 1, characterized in that: A pressure gauge (801) is installed on the upper end surface of the controller (8), and an alarm (9) is fixedly installed on the upper end surface of the turntable (702). The alarm (9) is electrically connected to the controller (8).

3. The pressure-adjustable emergency pressure relief device according to claim 1, characterized in that: A signal transmitter (3) is fixedly mounted on the outer end surface of the drainage tube (202), a detection rod (301) is fixedly mounted on the lower end surface of the signal transmitter (3), a sensor is mounted on the end of the detection rod (301), and the detection rod (301) is located inside the drainage tube (202).

4. The pressure-adjustable emergency pressure relief device according to claim 1, characterized in that: The upper end surface of the regulating tube (2) is provided with a cover plate (203), the cover plate (203) and the regulating tube (2) are connected via bolts, and the cover plate (203) is threadedly connected to the regulating screw (7).

5. The pressure-adjustable emergency pressure relief device according to claim 1, characterized in that: The upper end portion of the connecting rod (502) is slidably mounted in the through groove (701) inside the adjusting screw (7), and the outer end surface of the connecting rod (502) is provided with four annular slots (5021). The inner wall of the through hole (401) is provided with four limiting strips (4011) in the form of a ring, and the four limiting strips (4011) are respectively engaged in the four slots (5021).

6. The pressure-adjustable emergency pressure relief device according to claim 1, characterized in that: The connecting rod (502) is sleeved with a connecting spring (6) on its exterior, and the connecting spring (6) is located between the adjusting plate (4) and the pressing plate (5).

7. The pressure-adjustable emergency pressure relief device according to claim 1, characterized in that: Six pull rods (7021) are installed on the outer end surface of the turntable (702), and the six pull rods (7021) are arranged in a ring structure.

8. The pressure-adjustable emergency pressure relief device according to claim 1, characterized in that: Rubber strips (102) are evenly installed on the outer end surfaces of the left and right ends of the pressure relief valve body (1), and the outer end surfaces of the rubber strips (102) are arc-shaped structures.

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