Explosion-proof device

Abstract

The utility model relates to the technical field of liquefied gas filling, in particular to an explosion-proof device, which comprises a filling pipeline, a cooling outer pipe and a small gas storage tank, a pressure detection valve is arranged at the tail of the filling pipeline, the cooling outer pipe is mounted on the outer side of the filling pipeline, a cooling cavity is formed between the cooling outer pipe and the filling pipeline, and the small gas storage tank is mounted in the cooling cavity. A pressure relief branch pipe is installed at the tail of the filling pipeline, the pressure relief branch pipe is communicated with the filling pipeline, an automatic pressure relief valve and a check valve are arranged on the pressure relief branch pipe, a first air inlet pipe is arranged on the small air storage tank, and a second air inlet pipe is installed at the side end of the first air inlet pipe. The gas filling system has the advantages that the gasification amount of liquefied gas is reduced, automatic pressure relief can be achieved under the emergency condition, pipeline overpressure burst and operator injury are prevented, potential safety hazards of the gas filling system are reduced, the safety and reliability of the gas filling system are improved, accidents are reduced, and the safety of the gas filling system is improved. And the life safety of personnel and the normal operation of equipment are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of liquefied gas filling, in particular to an explosion-proof device. Background Art

[0002] Gas filling systems play an important role in industrial production and scientific experiments, but there are also safety hazards in their use. During the filling process, the pipeline is not pre-cooled thoroughly. At the beginning of the filling process, the residual liquid nitrogen, liquid oxygen or liquid argon in the pipeline is quickly gasified, and the pressure in the pipeline rises sharply, causing the pipeline to burst. After this accident occurs, it will not only cause equipment damage and production interruption, but also may endanger the life safety of operators. Therefore, the utility model provides an explosion-proof device. Utility Model Content

[0003] The purpose of the utility model is to provide an explosion-proof device, which has the advantages of reducing the gasification amount of liquefied gas and automatically releasing pressure in an emergency to prevent pipeline overpressure bursting and operator injury, reduce the safety hazards of the gas filling system, improve the safety and reliability of the gas filling system, reduce the occurrence of accidents, ensure the life safety of personnel and the normal operation of equipment, and solve the problems raised by the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an explosion-proof device, comprising a filling pipe, a cooling outer pipe and a small gas storage tank, a pressure detection valve is arranged at the tail end of the filling pipe, the cooling outer pipe is installed on the outside of the filling pipe, a cooling chamber is formed between the cooling outer pipe and the filling pipe, a cold medium inlet pipe is arranged on one side of the upper end of the cooling outer pipe, a cold medium discharge pipe is arranged on one side of the lower end of the cooling outer pipe, a pressure relief branch pipe is arranged at the tail end of the filling pipe, the pressure relief branch pipe is connected with the filling pipe, an automatic pressure relief valve and a check valve are arranged on the pressure relief branch pipe, the check valve is located on one side of the automatic pressure relief valve, a first air inlet pipe is arranged on the small gas storage tank, a second air inlet pipe is arranged on the side end of the first air inlet pipe, and the second air inlet pipe is connected with the first air inlet pipe.

[0005] When using the explosion-proof device of the utility model,

[0006] When filling liquefied gas, cooling medium is added into the cooling chamber through the cold medium inlet pipe. The cooling medium can cool the filling pipeline and keep the filling pipeline at a low temperature. The internal pressure of the filling pipeline can be detected in real time through the pressure detection valve. When the pressure is too high, the gas will enter the pressure relief branch pipe under the action of the automatic pressure relief valve, and then enter the small gas storage tank through the pressure relief branch pipe, and the pressure relief work can be automatically performed.

[0007] Preferably, the cold medium inlet pipe and the cold medium outlet pipe are both connected to the cooling chamber, and valves are provided on the cold medium inlet pipe and the cold medium outlet pipe.

[0008] Preferably, connectors are installed at both ends of the filling pipe.

[0009] Preferably, flanges are installed at the ends of the second air inlet pipe and the pressure relief branch pipe, and nuts are threadedly installed at the ends of bolts installed in the mounting holes of the flanges.

[0010] Preferably, a safety valve is provided on the first air intake pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: when filling liquefied gas, cooling medium is added to the cooling chamber through the cold medium inlet pipe, and the cooling medium can cool the filling pipeline and keep the filling pipeline in a low temperature state, which can effectively reduce the gasification amount of liquefied gas, thereby preventing the pressure in the filling pipeline from increasing rapidly. When the pressure in the filling pipeline is too high, the gas will enter the pressure relief branch pipe under the action of the automatic pressure relief valve, and then enter the small gas storage tank through the pressure relief branch pipe. It can automatically release pressure in an emergency to prevent the pipeline from bursting due to overpressure and injuries to operators, reduce the safety hazards of the gas filling system, improve the safety and reliability of the gas filling system, reduce the occurrence of accidents, and ensure the life safety of personnel and the normal operation of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view structural schematic diagram of the utility model;

[0013] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0014] Figure 3 It is a cross-sectional structural schematic diagram of the utility model.

[0015] The reference numerals and names in the figures are as follows:

[0016] 101. Filling pipeline; 102. Cooling outer pipe; 103. Connector; 104. Cold medium inlet pipe; 105. Cold medium outlet pipe; 106. Pressure detection valve; 107. Automatic pressure relief valve; 108. Check valve; 109. Pressure relief branch pipe; 201. Small gas storage tank; 202. First air inlet pipe; 203. Safety valve; 204. Second air inlet pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Example

[0019] See also Figures 1 to 3 , an embodiment provided by the utility model: an explosion-proof device, comprising:

[0020] A filling pipe 101, a cooling outer pipe 102 and a small gas storage tank 201, the tail of the filling pipe 101 is provided with a pressure detection valve 106, the cooling outer pipe 102 is installed on the outside of the filling pipe 101, a cooling chamber is formed between the cooling outer pipe 102 and the filling pipe 101, a cold medium inlet pipe 104 is installed on one side of the upper end of the cooling outer pipe 102, a cold medium outlet pipe 105 is installed on one side of the lower end of the cooling outer pipe 102, the filling pipe A pressure relief branch pipe 109 is installed at the tail of the filling pipe 101, and the pressure relief branch pipe 109 is connected to the filling pipe 101. An automatic pressure relief valve 107 and a check valve 108 are provided on the pressure relief branch pipe 109. The check valve 108 is located on one side of the automatic pressure relief valve 107. A first air intake pipe 202 is provided on the small air storage tank 201, and a second air intake pipe 204 is installed on the side end of the first air intake pipe 202, and the second air intake pipe 204 is connected to the first air intake pipe 202.

[0021] In this embodiment, when the liquefied gas is filled, a cooling medium is added to the cooling chamber through the cold medium inlet pipe 104. The cooling medium can cool the filling pipe 101 and keep the filling pipe 101 in a low temperature state. The internal pressure of the filling pipe 101 can be detected in real time through the pressure detection valve 106. When the pressure is too high, the gas will enter the pressure relief branch pipe 109 under the action of the automatic pressure relief valve 107, and then enter the small gas storage tank 201 through the pressure relief branch pipe 109, and the pressure relief work can be automatically performed.

[0022] Furthermore,

[0023] The cold medium inlet pipe 104 and the cold medium outlet pipe 105 are both connected to the cooling chamber, and valves are provided on the cold medium inlet pipe 104 and the cold medium outlet pipe 105. The cold medium inlet pipe 104 is used to add cooling medium into the cooling chamber, and the cooling medium in the cooling chamber can be discharged through the cold medium outlet pipe 105.

[0024] Furthermore,

[0025] Connectors 103 are installed at both ends of the filling pipe 101. The connector 103 is used to connect the gas filling equipment and the gas storage tank.

[0026] Furthermore,

[0027] The ends of the second air inlet pipe 204 and the pressure relief branch pipe 109 are both equipped with flanges, and the ends of bolts installed in the mounting holes of the flanges are threadedly equipped with nuts. The flanges are used to connect the second air inlet pipe 204 and the pressure relief branch pipe 109.

[0028] Furthermore,

[0029] The first air inlet pipe 202 is provided with a safety valve 203 .

[0030] The pressure detection valve 106, automatic pressure relief valve 107, check valve 108 and safety valve 203 in the utility model are well-known devices, and their working principles and circuit connections are well known to technicians in the field. They are all conventional means or common knowledge and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An explosion-proof device, comprising a filling pipe (101), a cooling outer pipe (102) and a small gas storage tank (201), characterized in that: A pressure detection valve (106) is provided at the tail of the filling pipeline (101); the cooling outer tube (102) is installed on the outside of the filling pipeline (101); a cooling chamber is formed between the cooling outer tube (102) and the filling pipeline (101); a cold medium inlet tube (104) is installed on one side of the upper end of the cooling outer tube (102); a cold medium outlet tube (105) is installed on one side of the lower end of the cooling outer tube (102); a pressure relief branch tube (106) is installed at the tail of the filling pipeline (101); 109), the pressure relief branch pipe (109) is connected to the filling pipe (101), the pressure relief branch pipe (109) is provided with an automatic pressure relief valve (107) and a check valve (108), the check valve (108) is located on one side of the automatic pressure relief valve (107), the small air storage tank (201) is provided with a first air intake pipe (202), a second air intake pipe (204) is installed at the side end of the first air intake pipe (202), and the second air intake pipe (204) is connected to the first air intake pipe (202).

2. An explosion-proof device according to claim 1, characterized in that: The cold medium inlet pipe (104) and the cold medium outlet pipe (105) are both connected to the cooling chamber, and valves are provided on the cold medium inlet pipe (104) and the cold medium outlet pipe (105).

3. An explosion-proof device according to claim 1, characterized in that: Connectors (103) are installed at both ends of the filling pipe (101).

4. An explosion-proof device according to claim 1, characterized in that: Flanges are installed at the ends of the second air inlet pipe (204) and the pressure relief branch pipe (109), and nuts are installed at the ends of bolts installed in the mounting holes of the flanges.

5. An explosion-proof device according to claim 1, characterized in that: The first air inlet pipe (202) is provided with a safety valve (203).

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