Pressure relief device for pressure reducing valve

Abstract

The utility model relates to the technical field of pressure reducing valves, in particular to a pressure relief device for a pressure reducing valve, which comprises an external thread connecting pipe, a sealing cover, an exhaust pipe and an exhaust port, a top airflow channel of the external thread connecting pipe is communicated with a sealing cylinder, the outer side of the sealing cylinder is sleeved with a sealing sleeve, and a supporting ring is welded at the bottom end of the sealing sleeve. A groove is formed in the outer side of the inner top of the external thread connecting pipe, and the top of the groove is connected with supporting rings through supporting springs at equal intervals. A sealing cover is clamped to the top of the external thread connecting pipe, the top of the sealing cover communicates with an exhaust pipe, an exhaust port is formed in the top of the exhaust pipe, and a high-temperature alarm is installed at the position, located on one side of the exhaust port, of the top of the exhaust pipe through screws. The pressure relief device for the pressure reducing valve is convenient to mount and dismount, simple in structure and convenient to assemble, early warning is carried out on exhausted high-temperature gas, and scalding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, and particularly relates to a pressure relief device for a pressure reducing valve. Background Art

[0002] The pressure reducing valve itself does not directly serve as a pressure relief device, but its design principle and function include a certain pressure regulation and release mechanism, which can prevent the system pressure from being too high to a certain extent. However, when it comes to a dedicated pressure relief device for a pressure reducing valve, this usually refers to a device that is used in conjunction with the pressure reducing valve or integrated inside the pressure reducing valve, and is used to release pressure under specific conditions to prevent the system from being damaged due to overpressure; a pressure reducing valve will be installed at the top of the reaction vessel and a pressure relief device will be used to relieve the pressure to ensure the stability of the internal pressure and avoid damaging the reaction vessel.

[0003] The existing pressure relief device for a pressure reducing valve is overall complex, not convenient for assembly production, and cannot give an early warning of the discharged high-temperature gas to avoid scalding. Summary of the Utility Model

[0004] Aiming at the problems in the prior art, the utility model provides a pressure relief device for a pressure reducing valve. The pressure relief device for a pressure reducing valve is convenient for installation and disassembly, has a simple structure, is convenient for assembly, gives an early warning of the discharged high-temperature gas, and avoids scalding.

[0005] The technical solution adopted by the utility model to solve its technical problems is a pressure relief device for a pressure reducing valve, which includes an externally threaded connecting pipe, a sealing cover, an exhaust pipe and an exhaust port. A sealing cylinder is connected and arranged in the air flow channel at the top of the externally threaded connecting pipe. A sealing sleeve is sleeved outside the sealing cylinder, and a support ring is welded at the bottom end of the sealing sleeve. A groove is arranged outside the inner top of the externally threaded connecting pipe, and the top of the groove is connected to the support ring by support springs at equal intervals;

[0006] The top of the externally threaded connecting pipe is clamped with a sealing cover. An exhaust pipe is connected and arranged at the top of the sealing cover. An exhaust port is arranged at the top of the exhaust pipe. A high-temperature alarm is installed on the top of the exhaust pipe and on one side of the exhaust port by screws.

[0007] By adopting the above technical solution, the pressure relief device for a pressure reducing valve is convenient for installation and disassembly, has a simple structure, is convenient for assembly, gives an early warning of the discharged high-temperature gas, and avoids scalding.

[0008] Specifically, a lower flange and an upper flange are respectively arranged on the outer side of the top of the externally threaded connecting pipe and the outer side of the bottom of the sealing cover, and the lower flange and the upper flange are fixedly connected by docking bolts.

[0009] By adopting the above technical solution, the lower flange, the upper flange and the docking bolts are convenient for realizing assembly and fixation.

[0010] Specifically, the detection end of the high-temperature alarm is located inside the exhaust port.

[0011] By adopting the above technical solution, when the gas temperature inside the exhaust port is high and exceeds the set value of the high-temperature alarm, the high-temperature alarm will issue an alarm immediately.

[0012] Specifically, both ends of the support spring are respectively connected to the support ring and the inner wall of the groove through positioning plates and screws.

[0013] Specifically, the exhaust port, the exhaust pipe, the sealing cover, and the external thread connecting pipe are all made of stainless steel.

[0014] The beneficial effects of the present utility model:

[0015] For the pressure relief device for a pressure reducing valve of the present utility model, the external thread connecting pipe is used to easily screw the overall pressure relief device into the corresponding screw hole of the reaction vessel. When the air pressure in the reaction vessel increases, the sealing cylinder is automatically pushed up against the elastic force of the support spring, so that the gas flows out from the gap between the sealing cylinder and the air flow channel of the external thread connecting pipe, realizing automatic pressure relief. The discharged gas enters the sealing cover and the exhaust pipe, and finally discharges from the exhaust port.

[0016] For the pressure relief device for a pressure reducing valve of the present utility model, when the gas temperature inside the exhaust port is high and exceeds the set value of the high-temperature alarm, the high-temperature alarm will issue an alarm immediately to remind the staff and avoid scalding. When the pressure in the reaction vessel is low, the support spring resets, so that the sealing cylinder is re-engaged at the top of the air flow channel of the external thread connecting pipe to achieve self-sealing. The pressure relief device for a pressure reducing valve is easy to install and disassemble, has a simple structure, and is convenient for assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 is the bottom view of the present utility model;

[0020] Figure 3 is for the present utility model Figure 1 structural schematic diagram at A.

[0021] In the figure: 1, exhaust port; 2, high-temperature alarm; 3, exhaust pipe; 4, sealing cover; 5, docking bolt; 6, upper flange; 7, sealing cylinder; 8, support ring; 9, sealing sleeve; 10, lower flange; 11, external thread connecting pipe; 13, sealing ring; 14, groove; 15, support spring; 16, positioning plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] In order to facilitate the installation and disassembly of the pressure relief device for the pressure reducing valve, the structure is simple and easy to assemble, and the high temperature gas discharged is warned to avoid burns, such as Figures 1-3 As shown, a pressure relief device for a pressure reducing valve described in the utility model comprises an external threaded connection pipe 11, a sealing cover 4, an exhaust pipe 3 and an exhaust port 1, the top air flow channel of the external threaded connection pipe 11 is connected to a sealing cylinder 7, the outer side of the sealing cylinder 7 is sleeved with a sealing sleeve 9 and a support ring 8 is welded to the bottom end of the sealing sleeve 9, a groove 14 is arranged on the outer side of the top of the internal part of the external threaded connection pipe 11, and the top of the groove 14 is equidistantly connected to the support ring 8 through a support spring 15;

[0024] A sealing cover 4 is engaged at the top of the external threaded connecting pipe 11, an exhaust pipe 3 is connected to the top of the sealing cover 4, an exhaust port 1 is provided at the top of the exhaust pipe 3, and a high temperature alarm 2 is installed at the top of the exhaust pipe 3 and on one side of the exhaust port 1 by screws.

[0025] When in use, the pressure relief device for the pressure reducing valve is easy to install and disassemble, has a simple structure, is easy to assemble, and provides an early warning of the discharged high-temperature gas to avoid burns.

[0026] For example, Figure 1 As shown, the utility model also includes that a lower flange 10 and an upper flange 6 are respectively provided on the outer side of the top of the external threaded connecting pipe 11 and the outer side of the bottom of the sealing cover 4, and the lower flange 10 and the upper flange 6 are fixedly connected by docking bolts 5.

[0027] When in use, the lower flange 10, the upper flange 6 and the butt bolts 5 are easily assembled and fixed.

[0028] For example, Figure 1 As shown, the utility model also includes that the detection end of the high temperature alarm 2 is located in the exhaust port 1.

[0029] When in use, when the gas temperature in the exhaust port 1 is high and exceeds the set value of the high temperature alarm 2, the high temperature alarm 2 will sound an alarm immediately.

[0030] For example, Figure 1 , 3 As shown, the utility model also includes that the two ends of the support spring 15 are respectively connected to the support ring 8 and the inner wall of the groove 14 through a positioning plate 16 and screws.

[0031] When in use, the support spring 15 is easily installed and removed through the positioning plate 16 and the screws.

[0032] Exemplarily, as Figure 1 shown, the present utility model further includes that the exhaust port 1, the exhaust pipe 3, the sealing cover 4, and the external thread connecting pipe 11 are all made of stainless steel material.

[0033] During use, the stainless steel material is not easy to rust, has high strength, is not easy to deform, and is durable.

[0034] When the present utility model is in use, the external thread connecting pipe 11 is used to easily screw the overall pressure relief device into the corresponding screw hole of the reaction vessel. When the air pressure in the reaction vessel increases, the sealing cylinder 7 is automatically pushed up against the elastic force of the support spring 15, so that the gas flows out from the gap between the sealing cylinder 7 and the air flow channel of the external thread connecting pipe 11, realizing automatic pressure relief;

[0035] The exhausted gas enters the sealing cover 4 and the exhaust pipe 3, and finally discharges from the exhaust port 1. When the temperature of the gas in the exhaust port 1 is relatively high and exceeds the set value of the high-temperature alarm 2, the high-temperature alarm 2 will issue an alarm immediately to remind the staff to avoid scalding. When the pressure in the reaction vessel is relatively low, the support spring 15 resets, so that the sealing cylinder 7 is re-engaged at the top of the air flow channel of the external thread connecting pipe 11, realizing self-sealing;

[0036] The pressure relief device for the pressure reducing valve is convenient for installation and disassembly, has a simple structure, is convenient for assembly, warns of the exhausted high-temperature gas, and avoids scalding.

[0037] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present utility model. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure relief device for a pressure reducing valve, characterized in that, It includes an externally threaded connecting pipe (11), a sealing cover (4), an exhaust pipe (3) and an exhaust port (1). A sealing cylinder (7) is communicated with the air flow channel at the top of the externally threaded connecting pipe (11). A sealing sleeve (9) is sleeved outside the sealing cylinder (7), and a support ring (8) is welded to the bottom end of the sealing sleeve (9). A groove (14) is arranged on the outer side of the inner top of the externally threaded connecting pipe (11). The top of the groove (14) is connected to the support ring (8) by support springs (15) at equal intervals; The sealing cover (4) is clamped on the top of the externally threaded connecting pipe (11). The exhaust pipe (3) is communicated with the top of the sealing cover (4). The exhaust port (1) is arranged at the top of the exhaust pipe (3). A high-temperature alarm (2) is installed on the top of the exhaust pipe (3) and on one side of the exhaust port (1) by screws.

2. The pressure relief device for a pressure reducing valve according to claim 1, characterized in that, Lower flange plates (10) and upper flange plates (6) are respectively arranged on the outer sides of the top of the externally threaded connecting pipe (11) and the bottom of the sealing cover (4). The lower flange plates (10) and the upper flange plates (6) are fixedly connected by butt bolts (5).

3. The pressure relief device for a pressure reducing valve according to claim 1, characterized in that, The detection end of the high-temperature alarm (2) is located in the exhaust port (1).

4. A pressure relief device for a pressure reducing valve according to claim 1, characterized in that, Both ends of the support spring (15) are respectively connected to the support ring (8) and the inner wall of the groove (14) by positioning plates (16) and screws.

5. A pressure relief device for a pressure reducing valve according to claim 1, characterized in that, The exhaust port (1), the exhaust pipe (3), the sealing cover (4) and the externally threaded connecting pipe (11) are all made of stainless steel materials.

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