Pressure relief and noise reduction structure of pressure vessel

Abstract

The utility model discloses a pressure vessel pressure relief noise reduction structure, which is arranged between a sealing cavity and a pressure relief pipeline of a plant, and comprises a pressure relief pipe, a pressure regulating valve, a silencer and a connecting pipeline, the pressure relief pipe is connected to the sealing cavity, the pressure relief pipe, the pressure regulating valve and the silencer are sequentially connected through the connecting pipeline, and the connecting pipeline is connected with the pressure relief pipe. The silencer is connected to a pressure relief pipe, a first control valve is arranged between the pressure relief pipe and the pressure regulating valve, the connecting pipeline is further connected with a pressure relief branch, the pressure relief branch is communicated with the first control valve and the silencer, and the pressure relief branch is provided with a second control valve. The pressure regulating valve and the parallel pressure relief branch are arranged to rearrange the existing pressure relief pipeline, so that the noise generated during pressure relief of the sealing cavity is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a pressure relief and noise reduction structure for a pressure vessel. Background Art

[0002] At present, the principle of the static stations in the mainstream form of liquid filling machines, whether vertical or horizontal, is the same. They are all closed pressure vessels during the working state. After completing the work tasks, the positive pressure in the sealed cavity needs to be released. At this time, due to the excessive internal pressure and the small diameter of the air release port, the gas is squeezed and accelerated when passing through, resulting in phenomena such as ultra-high decibel popping, which affects the on-site environment and will cause the corresponding pipeline life to decline in the long term, increasing the subsequent maintenance cost.

[0003] In view of this, the purpose of the utility model is to provide a new technical solution to solve the existing technical problems. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a pressure relief and noise reduction structure for a pressure vessel, which solves the problem of ultra-high decibel popping during the pressure relief of the pressure vessel.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A pressure relief and noise reduction structure for a pressure vessel is arranged between the sealed cavity and the pressure relief pipeline of the factory building, and includes a pressure relief pipe, a pressure regulating valve, a silencer and a connecting pipeline. The pressure relief pipe is connected to the sealed cavity, and the pressure relief pipe, the pressure regulating valve and the silencer are sequentially connected through the connecting pipeline. The silencer is connected to the pressure relief pipeline. There is a first control valve between the pressure relief pipe and the pressure regulating valve. A pressure relief branch is also connected to the connecting pipeline. The pressure relief branch communicates with the first control valve and the silencer, and there is a second control valve on the pressure relief branch.

[0007] In the above structure, the connecting pipeline includes a first tee and a second tee. The first tee connects the first control valve and the pressure regulating valve and communicates with the pressure relief branch; the second tee connects the pressure regulating valve and the silencer and communicates with the pressure relief branch.

[0008] In the above structure, the pressure relief branch further includes a connecting elbow. The input end and the output end of the second control valve are both connected with connecting elbows, and the two connecting elbows on both sides are respectively connected to the first tee and the second tee.

[0009] In the above structure, sound insulation materials are coated on the pressure relief pipe, the connecting pipeline and the connecting elbow.

[0010] In the above structure, a first digital display pressure gauge is connected to the pressure regulating valve, and a second digital display pressure gauge is arranged on the sealing cavity.

[0011] In the above structure, the first control valve is a first pneumatic ball valve, and the second control valve is a second pneumatic ball valve.

[0012] In the above structure, the inner diameter of the connecting pipe connecting the first control valve and the pressure regulating valve part is greater than or equal to the inner diameter of the pressure relief pipe.

[0013] In the above structure, the inner diameter of the connecting pipe connecting the first control valve and the pressure regulating valve part is 1 to 1.1 times the inner diameter of the pressure relief pipe.

[0014] In the above structure, the inner diameter of the connecting pipe connecting the pressure regulating valve and the muffler part is less than or equal to the inner diameter of the pressure relief pipe.

[0015] In the above structure, the inner diameter of the connecting pipe connecting the pressure regulating valve and the muffler part is 0.5 to 0.8 times the inner diameter of the pressure relief pipe.

[0016] The beneficial effects of the present utility model are as follows: By arranging a pressure regulating valve on the main pressure relief path, setting a lower exhaust port pressure to reduce the pressure drop ratio, thereby reducing the possibility of air flow detonation; and arranging a pressure relief branch in parallel with the main pressure relief path to switch the gas path under different gas pressures, effectively reducing noise during the pressure relief process while improving the pressure relief efficiency. 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 schematic diagram of the present utility model;

[0019] Figure 2 is the schematic diagram of the overall structure of the present utility model;

[0020] Figure 3 is the front view of the present utility model.

[0021] Reference numerals: 1, pressure relief pipe; 2, first control valve; 3, pressure regulating valve; 31, first digital display pressure gauge; 4, connecting pipe; 41, first three-way pipe; 42, second three-way pipe; 5, pressure relief branch; 51, second control valve; 52, connecting elbow; 6, muffler; 7, sealing cavity; 71, second digital display pressure gauge; 8, sound insulation material; 9, wrapping area; 10, pressure relief pipeline. Detailed Description of the Preferred Embodiments

[0022] The present utility model will be further described below in conjunction with the attached Figures 1-3 drawings.

[0023] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a more optimal connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the present utility model can be interactively combined without conflicting with each other.

[0024] Referring to Figures 1 to 3 , the present utility model provides a pressure relief and noise reduction structure for a pressure vessel, which can be arranged between a sealed cavity 7 (such as a static station of a liquid injection machine) and a pressure relief pipeline 10 of a factory building to reduce noise during pressure relief of the sealed cavity 7. It includes a pressure relief pipe 1, a pressure regulating valve 3, a silencer 6 and a connecting pipe 4. The pressure relief pipe 1 is connected to the sealed cavity 7, and the high-pressure gas in the sealed cavity 7 is discharged from the pressure relief pipe 1; the pressure relief pipe 1, the pressure regulating valve 3 and the silencer 6 are sequentially connected through the connecting pipe 4, and the air flow flowing out of the pressure relief pipe 1 can sequentially pass through the pressure regulating valve 3 and the silencer 6 and be discharged into the pressure relief pipeline 10 of the factory building; the pressure regulating valve 3 is used to adjust the magnitude of the air pressure when the pressure relief pipe 1 exhausts gas to reduce the noise generated during pressure relief. When the sealed cavity 7 releases positive pressure, due to the excessive internal pressure and the small diameter of the exhaust port, the gas will be squeezed and accelerated when passing through the exhaust port, generating a detonation sound. By setting the pressure regulating valve 3 to set a lower exhaust port pressure, the exhaust port pressure drop ratio can be reduced, thereby reducing the noise generated during pressure relief. The silencer 6 is connected to the pressure relief pipeline 10 of the factory building, and the silencer 6 is provided to further reduce the noise of the flowing air flow. A first control valve 2 is arranged between the pressure relief pipe 1 and the pressure regulating valve 3, and the first control valve 2 is used to control whether the pressure relief pipe 1 discharges gas or not. A pressure relief branch 5 is also connected to the connecting pipe 4. The pressure relief branch 5 communicates with the first control valve 2 and the silencer 6. The pressure relief branch 5 is provided with a second control valve 51. When the second control valve 51 is in the open state, the air flow can flow from the pressure relief branch 5 to the silencer 6 and then be discharged into the pressure relief pipeline 10 of the factory building; when the second control valve 51 is in the closed state, the high-pressure air flow is discharged in sequence through the path of the first control valve 2 → the pressure regulating valve 3 → the silencer 6 → the pressure relief pipeline 10 of the factory building (i.e., the main pressure relief path).

[0025] By setting the pressure relief branch 5, when the pressure relief of the sealed cavity 7 is reduced to a certain extent by discharging gas through the main pressure relief path, the second control valve 51 is opened, providing an additional discharge path for the air flow discharge, which can effectively reduce the pressure relief time and improve production efficiency.

[0026] Reference Figure 3 , the connecting pipe 4 includes a first three-way pipe 41 and a second three-way pipe 42. The three connecting ports of the first three-way pipe 41 are respectively connected to the first control valve 2, the pressure regulating valve 3 and the pressure relief branch 5; the three connecting ports of the second three-way pipe 42 are respectively connected to the pressure regulating valve 3, the silencer 6 and the pressure relief branch 5. Connecting each component through the three-way pipe structure has a simple structure and effectively ensures the sealing performance of the connection between pipe fittings.

[0027] In addition, in this embodiment, the connection between each pipe fitting and each component (such as between the pressure relief pipe 1 and the sealing cavity 7, between the pressure relief pipe 1 and the first control valve 2) is carried out through an MC type ferrule external joint. The installation form of the MC ferrule external joint is of the ferrule type. The installation process is simple and does not require special tools, which greatly saves installation time and cost. Moreover, the MC ferrule external joint has reliable sealing performance and strong pressure resistance, which is beneficial to the transmission and discharge of high-pressure gas.

[0028] Reference Figure 3 , the pressure relief branch 5 further includes a connecting elbow 52. Connecting elbows 52 are connected to both the input end and the output end of the second control valve 51. The connecting elbows 52 located on both sides of the second control valve 51 are respectively connected to the first three-way pipe 41 and the second three-way pipe 42 to realize the connection between the pressure relief branch 5 and the pressure relief main path.

[0029] Furthermore, referring to Figure 2 and Figure 3 , in order to reduce the noise generated by the airflow during the pipeline flow, sound insulation materials 8 are coated on the pressure relief pipe 1, the connecting pipe 4 and the connecting elbow 52. The specific sound insulation material 8 can be damping sheets and sound insulation cotton. Setting damping sheets and sound insulation cotton can effectively reduce the noise generated by the friction between the gas and the pipe wall during the flow.

[0030] Furthermore, referring to Figure 3 , a first digital display pressure gauge 31 is provided on the pressure regulating valve 3. The first digital display pressure gauge 31 is used to monitor the gas pressure passing through the pressure regulating valve 3 in real time. When the high-pressure gas in the sealing cavity 7 is discharged along the pressure relief main path for a period of time and the air pressure drops to a predetermined range (roughly between 1.5 times the atmospheric pressure), the second control valve 51 is opened. At this time, the remaining gas can be discharged through the pressure relief branch 5 for acceleration, that is, the air flow is discharged in the order of the first control valve 2 → the second control valve 51 → the silencer 6 → the pressure relief pipeline 10 of the workshop. A second digital display pressure gauge 71 is provided on the sealing cavity 7. The second digital display pressure gauge 71 is connected to the inside of the sealing cavity 7 to monitor its internal pressure in real time.

[0031] Furthermore, the first control valve 2 is a first pneumatic ball valve, and the second control valve 51 is a second pneumatic ball valve. The pneumatic ball valve can quickly achieve opening and closing actions, improving work efficiency. Moreover, the pneumatic ball valve has a relatively small fluid resistance, which helps to reduce the noise generated by the fluid resistance when the air flow passes through the first control valve 2 and the second control valve 51. In addition, the pneumatic ball valve has good sealing performance, which is beneficial to the transmission and discharge of gas.

[0032] In an embodiment, the inner diameter of the connecting pipe 4 connecting the first control valve 2 and the pressure regulating valve 3 is greater than or equal to the inner diameter of the pressure relief pipe 1. Since the pressure relief pipe 1 is directly connected to the sealing cavity 7, and due to the structure of the pneumatic ball valve that can only be fully opened or fully closed, the inner diameter of the connecting pipe 4 connecting the first control valve 2 and the pressure regulating valve 3 should be at least equal to the inner diameter of the pressure relief pipe 1 to ensure that the air flow flowing through the first control valve 2 from the pressure relief pipe 1 will not be squeezed and accelerated when passing through due to the reduction of the pipe diameter, generating additional noise. When the inner diameter of the connecting pipe 4 connecting the first control valve 2 and the pressure regulating valve 3 is greater than the inner diameter of the pressure relief pipe 1, the diameter of the air flow passage becomes larger, which can reduce the flow rate of the air flow and is beneficial to reducing noise.

[0033] Furthermore, the inner diameter of the connecting pipe 4 connecting the first control valve 2 and the pressure regulating valve 3 is 1 to 1.1 times the inner diameter of the pressure relief pipe 1. Such a setting can achieve noise reduction by increasing the diameter and reducing the flow rate without much increase in cost.

[0034] Refer to Figure 3 , in an embodiment, the inner diameter of the connecting pipe 4 connecting the pressure regulating valve 3 and the silencer 6 is less than or equal to the inner diameter of the pressure relief pipe 1. When starting to relieve pressure normally, the air flow is delivered from the first control valve 2 to the pressure regulating valve 3. Due to the function of the pressure regulating valve 3, the actual gas flowing out of the pressure regulating valve 3 will have a reduced gas flow rate and flow velocity by several levels per unit time. Therefore, the inner diameter of the connecting pipe 4 corresponding to the outlet part of the pressure regulating valve 3 can be set to be smaller than the diameter of the pressure relief pipe 1; and when the pressure is relieved to a certain extent, when the air pressure value displayed by the digital display pressure gauge corresponding to the pressure regulating valve 3 reaches a predetermined range (such as when about 40%-60% of the gas in the closed container is discharged), the second control valve 51 opens. Due to the pressure difference, most of the air flow will be discharged from the pressure relief branch 5, bypassing the pressure regulating valve 3. At this time, the gas pressure has been reduced to a certain extent. Therefore, reducing the inner diameter of the connecting pipe 4 connecting the pressure regulating valve 3 and the silencer 6 will not generate greater noise.

[0035] Furthermore, the inner diameter of the connecting pipe 4 connecting the pressure regulating valve 3 and the silencer 6 is 0.5 to 0.8 times the inner diameter of the pressure relief pipe 1. Such a setting can reduce production costs while not affecting the pressure relief and exhaust effect.

[0036] In addition, the inner diameter of the connecting pipe 4 connecting the muffler 6 and a part of the plant pressure relief pipeline 10 can be set to be 0.5 to 0.8 times the inner diameter of the connecting pipe 4 connecting the pressure regulating valve 3 and the muffler 6, so as to further reduce the production cost. Since the gas discharged from this section of the pipeline has been decelerated and depressurized by the front-stage structure and has passed through the noise reduction of the muffler 6, the speed and noise of the air flow are relatively small at this time, and no greater gas noise will be generated due to the reduction of the pipe inner diameter.

[0037] In actual setting, the section from the first control valve 2 to the plant pressure relief pipeline 10 can be set as the wrapping area 9, that is, a sound insulation structure or the like is covered outside it to achieve the purpose of further reducing noise by secondarily preventing the sound from spreading in the air.

[0038] The working principle of the present utility model is as follows:

[0039] When the sealed cavity 7 needs to discharge the high-pressure gas inside it after completing its internal procedure, first open the first control valve 2. At this time, the second control valve 51 is in a closed state, and the pressure of the passing gas is adjusted through the pressure regulating valve 3. The high-pressure gas is exhausted and depressurized in sequence through the path of the first control valve 2 → the pressure regulating valve 3 → the muffler 6 → the pressure relief pipeline 10 of the plant (i.e., the main pressure relief path); observe the pressure value of the first digital display pressure gauge 31. When the value reaches the predetermined value range, open the second control valve 51. At this time, most of the remaining gas is accelerated and discharged in sequence through the path of the first control valve 2 → the second control valve 51 → the muffler 6 → the pressure relief pipeline 10 of the plant (i.e., the gas flows through the pressure relief branch 5) until the pressure relief operation is completed.

[0040] The above is a specific description of the preferred embodiment of the present utility model. However, the creation of the present utility model is not limited to the described embodiment. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A pressure vessel pressure relief and noise reduction structure, arranged between a sealed cavity and a pressure relief pipeline of a plant, characterized in that: It includes a pressure relief pipe, a pressure regulating valve, a muffler and a connecting pipe, the pressure relief pipe is connected to a sealed cavity, the pressure relief pipe, the pressure regulating valve and the muffler are connected in sequence through a connecting pipe, the muffler is connected to the pressure relief pipe, a first control valve is provided between the pressure relief pipe and the pressure regulating valve, a pressure relief branch is also connected to the connecting pipe, the pressure relief branch communicates the first control valve and the muffler, and a second control valve is provided on the pressure relief branch.

2. A pressure vessel pressure relief and noise reduction structure according to claim 1, characterized in that: The connecting pipeline includes a first three-way pipe and a second three-way pipe, the first three-way pipe connects the first control valve and the pressure regulating valve, and is communicated with the pressure relief branch; the second three-way pipe connects the pressure regulating valve and the muffler, and is communicated with the pressure relief branch.

3. A pressure vessel pressure relief and noise reduction structure according to claim 2, characterized in that: The pressure relief branch also includes a connecting elbow, and the input end and the output end of the second control valve are both connected to the connecting elbow, and the connecting elbows on both sides are respectively connected to the first three-way pipe and the second three-way pipe.

4. A pressure vessel pressure relief and noise reduction structure according to claim 3, characterized in that: The pressure relief pipe, the connecting pipe and the connecting elbow are all covered with sound insulation materials.

5. The pressure relief and noise reduction structure for a pressure vessel according to claim 1, characterized in that: The pressure regulating valve is connected to a first digital pressure gauge, and the sealed cavity is provided with a second digital pressure gauge.

6. The pressure relief and noise reduction structure for a pressure vessel according to claim 1, characterized in that: The first control valve is a first pneumatic ball valve, and the second control valve is a second pneumatic ball valve.

7. A pressure vessel pressure relief and noise reduction structure according to any one of claims 1 to 6, characterized in that: The inner diameter of the portion of the connecting pipe connecting the first control valve and the pressure regulating valve is greater than or equal to the inner diameter of the pressure relief pipe.

8. A pressure vessel pressure relief and noise reduction structure according to any one of claims 1 to 6, characterized in that: The inner diameter of the portion of the connecting pipe connecting the first control valve and the pressure regulating valve is 1 to 1.1 times the inner diameter of the pressure relief pipe.

9. The pressure vessel pressure relief and noise reduction structure according to claim 1, characterized in that: The inner diameter of the connecting pipe connecting the pressure regulating valve and the muffler is smaller than or equal to the inner diameter of the pressure relief pipe.

10. A pressure vessel pressure relief and noise reduction structure according to claim 9, characterized in that: The inner diameter of the connecting pipe connecting the pressure regulating valve and the muffler is 0.5 to 0.8 times the inner diameter of the pressure relief pipe.

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