Pressure relief protection device for temporary disposal of chemical pipeline
Through the temporary pressure relief protection device of chemical pipelines, the combination of automatic pressure relief mechanism and manual pressure relief valves is used to solve the problems of pipeline overpressure and secondary injury, and safe medium release and operation safety is achieved.
Patent Information
- Application Number
- CN202420545552.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-03-20
AI Technical Summary
Chemical pipelines are prone to risk of overpressure during disposal, resulting in cross-trend and secondary damage to the medium, and the prior art cannot effectively relieve pressure protection.
A temporary pressure relief protection device for chemical pipelines is designed, including gas source from the main pipeline, gas source-side control hand valve, pressure relief protection short-circuit, finished high-pressure hose and user-side control hand valve, through automatic pressure relief mechanism and manual The pressure relief valve achieves a safe release of the medium, ensuring that the pipe does not overpressure and eliminates secondary damage.
It effectively avoids the risk of overpressure of the pipeline and cross-travel of the medium, ensures safety of operation, and achieves complete emission of the medium through the combination of the automatic pressure relief mechanism and the manual pressure relief valve, and reduces the dangers during the hose disassembly.
Smart Images
Figure CN222209514U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of chemical pipelines, in particular to a temporary disposal pressure relief protection device for chemical pipelines. Background Art
[0002] In chemical production, the media in various chemical pipelines are undoubtedly extremely dangerous media such as flammable and explosive. Usually, after the chemical plant is shut down, the process pipelines need to be swept and drained. For pipelines involving upstream devices and high and low pressure system isolation, special purge nitrogen and purge steam lines are usually assigned during chemical design; the process treatment of other chemical pipelines requires temporary pipelines to introduce purge nitrogen and steam into the chemical pipelines through pipeline drainage and venting for process treatment, such as Figure 1 As shown, after installing the quick connector 6 by borrowing the drainage and venting ports of the chemical pipeline, it is connected to the nitrogen and steam gas sources which are also equipped with the quick connector 6 through the finished high-pressure hose 4. When the gas source is put into use, first open the gas source side control hand valve 2, press the pipeline, and then open the user side control hand valve 5 to purge the pipeline; when stopping the purge, first close the user side control hand valve 5, and then close the gas source side control hand valve 2.
[0003] After stopping the purging, first close the user-side control hand valve 5, and then close the gas source side control hand valve 2. In this way, the finished high-pressure hose 4 maintains high-pressure purging gas (medium: nitrogen, steam, pressure: gas source pressure). If the reverse operation is performed, that is, first close the gas source side control hand valve 2, and then close the user-side control hand valve 5, the flammable and explosive media in the chemical pipeline will flow back into the hose (medium: chemical materials, pressure: chemical material pressure, there is a risk of overpressure due to medium backflow).
[0004] In the above two operation methods, the finished high-pressure hose 4 will maintain different pressures of the medium. Compared with the two, the former does not have the risk of flammability and explosion. After the chemical pipeline is disposed, during the removal of the operator's hose, the pressure in the pipeline cannot be released. At the moment the joint is disconnected, the medium in the pipeline will spray out, which not only brings danger to the operator's operation, but also the instantaneous release of the medium is likely to cause secondary injuries. Utility Model Content
[0005] The utility model overcomes the shortcomings of the prior art and proposes a temporary disposal pressure relief protection device for chemical pipelines, thereby ensuring that the pipeline is not over-pressurized during the disposal process of the chemical pipeline and fundamentally eliminating the risk caused by pipeline over-pressure.
[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions.
[0007] A temporary disposal pressure relief protection device for a chemical pipeline, comprising an air source main pipeline, an air source side control hand valve, a pressure relief protection short circuit, a finished high-pressure hose, and a user side control hand valve; one end of the air source main pipeline is connected to the air source, and the other end is connected to one end of the pressure relief protection short circuit through a quick connector, the other end of the pressure relief protection short circuit is connected to one end of the finished high-pressure hose through a quick connector, and the other end of the finished high-pressure hose is connected to the chemical pipeline through the quick connector; an air source side control hand valve is provided on the air source main pipeline, and the user side control hand valve is connected to the connection between the chemical pipeline and the quick connector;
[0008] The pressure relief protection short circuit includes an automatic pressure relief mechanism, a manual pressure relief valve, and a rigid connecting pipe; both ends of the rigid connecting pipe are used to connect to quick connectors; the pipe wall of the rigid connecting pipe is respectively connected to the automatic pressure relief mechanism and the manual pressure relief valve.
[0009] Furthermore, pressure relief holes are evenly opened on the valve body of the automatic pressure relief mechanism, a spring is connected between the valve core and the valve body, and self-sealing is achieved under the action of the spring force; a labyrinth seal is arranged around the valve core and the valve body.
[0010] Furthermore, according to the male and female heads of the quick connectors connecting the gas source main pipeline and the finished high-pressure hose at both ends, the two ends of the rigid connecting pipe are respectively connected to the female and male heads of the quick connector, or both ends of the rigid connecting pipe are connected to the female head, or both ends of the rigid connecting pipe are connected to the male head.
[0011] Furthermore, one end of the rigid connecting pipe is connected to the quick connector by threading or welding.
[0012] Furthermore, the automatic pressure relief mechanism and the manual pressure relief valve are welded to the pipe wall of the rigid connecting pipe as a whole.
[0013] Furthermore, the other end of the finished high-pressure hose is connected to the drain port or vent port of the chemical pipeline through a quick connector, and a user-side control hand valve is welded at the drain port or vent port.
[0014] The beneficial effects of the utility model compared with the prior art are:
[0015] By installing a pressure relief protection short-circuit for temporary disposal of chemical pipelines, under the premise of optimizing operations, it can not only ensure that the pipeline is not over-pressurized during the chemical pipeline disposal process, but also fundamentally eliminate the risks caused by pipeline over-pressure; at the same time, after the chemical pipeline disposal is completed, the operator can discharge the medium in the hose before removing the hose, which fundamentally eliminates the secondary damage that may be caused by the hose disassembly process. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the existing temporary purge pipeline connection structure;
[0017] Figure 2 This is a schematic diagram of the temporary purge pipeline connection structure described in the utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the pressure relief protection short circuit described in Example 1;
[0019] Figure 4 This is a schematic diagram of the structure of the pressure relief protection short circuit described in Example 2;
[0020] Figure 5 This is a schematic diagram of the structure of the pressure relief protection short circuit described in Example 3;
[0021] In the figure: 1. Air source independent pipeline; 2. Air source side control hand valve; 3. Pressure relief protection short circuit; 31. Automatic pressure relief mechanism; 32. Manual pressure relief valve; 33. Rigid connecting pipe; 4. Finished high-pressure hose; 5. User side control hand valve; 6. Quick connector; 61. Female connector; 62. Male connector; 7. Drainage outlet or vent outlet. DETAILED DESCRIPTION
[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.
[0023] Example 1
[0024] See also Figure 2 This embodiment discloses a temporary disposal pressure relief protection device for a chemical pipeline, comprising an air source main pipeline 1, an air source side control hand valve 2, a pressure relief protection short circuit 3, a finished high-pressure hose 4, and a user side control hand valve 5; one end of the air source main pipeline 1 is connected to the air source, and the other end is connected to one end of the pressure relief protection short circuit 3 through a quick connector 6, the other end of the pressure relief protection short circuit 3 is connected to one end of the finished high-pressure hose 4 through a quick connector 6, and the other end of the finished high-pressure hose 4 is connected to a drain port or a vent port 7 of a chemical pipeline through a quick connector 6. An air source side control hand valve 2 is provided on the air source main pipeline 1, and a user side control hand valve 5 is welded at the drain port or the vent port 7.
[0025] The pressure relief protection short circuit 3 includes an automatic pressure relief mechanism 31, a manual pressure relief valve 32, and a rigid connecting pipe 33; see Figure 3One end of the rigid connecting pipe 33 is connected to the female head 61 of the quick connector 6 by threading or welding, and the other end of the rigid connecting pipe 33 is connected to the male head 62 of the quick connector 6 by threading or welding; the tube wall of the rigid connecting pipe 33 is welded to the automatic pressure relief mechanism 31 and the manual pressure relief valve 32 as a whole; wherein: the valve body of the automatic pressure relief mechanism 31 is evenly provided with pressure relief holes, a spring is connected between the valve core and the valve body, and a labyrinth seal is arranged around the valve core and the valve body; self-sealing is achieved under the action of the spring force, and the magnitude of the spring force is determined according to the gas source pressure and the chemical pipeline pressure. When the pressure in the finished high-pressure hose 4 exceeds the pressure, the automatic pressure relief mechanism 31 is opened, and the pressure is relieved through the pressure relief holes evenly opened on the valve body of the pressure relief mechanism. When the pressure is reduced and the balance is reached again, the valve core falls and the pressure relief valve is closed.
[0026] When the finished high-pressure hose 4 and various components are connected and the gas source is put into use, first open the gas source side control valve 2 to press the pipeline, then open the user side control valve 5 to purge the pipeline.
[0027] When stopping purging, first close the user side control hand valve 5, and then close the gas source side control hand valve 2. This operation can ensure that the chemical pipeline medium will not be reversed. After the front and rear control valves of the finished high-pressure hose 4 are closed, open the manual pressure relief valve 32 on the pressure relief protection short circuit 3, and after the pressure in the finished high-pressure hose 4 is completely discharged, the finished high-pressure hose 4 and its components are dismantled and restored on site.
[0028] By connecting the pressure relief protection short circuit 3 between the gas source main pipeline 1 and the finished high-pressure hose 4 through the quick connector 6, the automatic pressure relief mechanism 31 on the pressure relief protection short circuit 3 can be applied to different gas source pipelines, and at the same time, it plays a protective role for the finished high-pressure hose 4 during the purging process; after the chemical pipeline is disposed of, the medium in the hose can be discharged through the manual pressure relief valve 32 before the hose is removed, which fundamentally eliminates the secondary damage that may be caused by the hose disassembly process.
[0029] Example 2
[0030] This embodiment provides a temporary disposal pressure relief protection device for a chemical pipeline. The difference from the first embodiment is that according to the male and female ends of the quick connector 6 connected to the gas source main pipeline 1 and the finished high-pressure hose 4, both ends of the rigid connecting pipe 33 are connected to the male end 62 of the quick connector 6 by threading or welding. Figure 4 .
[0031] Example 3
[0032] This embodiment provides a temporary disposal pressure relief protection device for a chemical pipeline. The difference from the first embodiment is that according to the male and female heads of the quick connector 6 connected to the two ends of the gas source main pipeline 1 and the finished high-pressure hose 4, both ends of the rigid connecting pipe 33 are connected to the female head 61 of the quick connector 6 by threading or welding. Figure 5 .
[0033] The above content is a further detailed description of the utility model in combination with a specific preferred implementation method. It cannot be determined that the specific implementation methods of the utility model are limited to this. For ordinary technicians in the technical field to which the utility model belongs, they can make several simple deductions or substitutions without departing from the utility model, which should be regarded as belonging to the utility model and the scope of patent protection determined by the submitted claims.
Claims
1. A temporary pressure relief protection device for chemical pipelines, characterized in that: The invention comprises an air source main pipeline (1), an air source side control hand valve (2), a pressure relief protection short circuit (3), a finished high-pressure hose (4), and a user side control hand valve (5); one end of the air source main pipeline (1) is connected to the air source, and the other end is connected to one end of the pressure relief protection short circuit (3) through a quick connector (6); the other end of the pressure relief protection short circuit (3) is connected to one end of the finished high-pressure hose (4) through a quick connector (6); the other end of the finished high-pressure hose (4) is connected to a chemical pipeline through a quick connector (6); an air source side control hand valve (2) is provided on the air source main pipeline (1), and the connection between the chemical pipeline and the quick connector (6) is connected to the user side control hand valve (5); The pressure relief protection short circuit (3) comprises an automatic pressure relief mechanism (31), a manual pressure relief valve (32), and a rigid connecting pipe (33); both ends of the rigid connecting pipe (33) are used to connect to the quick connector (6); and the pipe wall of the rigid connecting pipe (33) is respectively connected to the automatic pressure relief mechanism (31) and the manual pressure relief valve (32).
2. A chemical pipeline temporary disposal pressure relief protection device according to claim 1, characterized in that: The valve body of the automatic pressure relief mechanism (31) is evenly provided with pressure relief holes, a spring is connected between the valve core and the valve body, and self-sealing is achieved under the action of the spring force; and a labyrinth seal is arranged around the valve core and the valve body.
3. A chemical pipeline temporary disposal pressure relief protection device according to claim 1, characterized in that: According to the male and female ends of the quick connector (6) connected to the gas source main pipeline (1) and the finished high-pressure hose (4), the two ends of the rigid connecting pipe (33) are respectively connected to the female end (61) and the male end (62) of the quick connector (6), or both ends of the rigid connecting pipe (33) are connected to the female end (61), or both ends of the rigid connecting pipe (33) are connected to the male end (62).
4. A chemical pipeline temporary disposal pressure relief protection device according to claim 3, characterized in that: One end of the rigid connecting pipe (33) is connected to the quick connector (6) by threading or welding.
5. A chemical pipeline temporary disposal pressure relief protection device according to claim 1, characterized in that: The automatic pressure relief mechanism (31) and the manual pressure relief valve (32) are welded to the wall of the rigid connecting pipe (33) to form a whole.
6. A chemical pipeline temporary disposal pressure relief protection device according to claim 1, characterized in that: The other end of the finished high-pressure hose (4) is connected to a drain port or a vent port (7) of a chemical pipeline via a quick connector (6), and a user-side control hand valve (5) is welded to the drain port or the vent port (7).