Dangerous gas emergency evacuation device for chemical safety

Abstract

The utility model relates to the technical field of gas evacuation devices, in particular to a dangerous gas emergency evacuation device for chemical safety, which comprises a ventilation pipe and a negative pressure source connected to the ventilation pipe, and further comprises a mounting bracket, a gas collecting hood, a sealing hood, a driving assembly, a detection piece and a control key, the gas collecting hood is mounted on the mounting bracket and is configured to be arranged above a tank body for producing chemicals, and the gas collecting hood is connected with a ventilation pipe; the gas collecting hood is sleeved with the sealing hood, the sealing hood can slide relative to the gas collecting hood in the vertical direction, and the sealing hood is used for covering the tank body; the driving assembly is connected with the sealing cover and the mounting bracket and is used for driving the sealing cover to slide; the detection piece is used for detecting gas leaked from the tank body; the negative pressure source, the driving assembly and the detection piece are all controlled by the control piece. The device has the effect that leaked poisonous gas can be timely and efficiently evacuated out of a workshop.

Description

Technical Field

[0001] The present application relates to the technical field of gas evacuation devices, and in particular to an emergency evacuation device for hazardous gases for chemical safety. Background Art

[0002] At present, when producing chemicals, it is generally necessary to put a variety of chemical raw materials into a tank such as a mixing tank or a reaction tank, and seal the opening of the tank with a tank cover to reduce the probability of leakage of toxic gases in the tank. However, sometimes due to aging of the seal or operator error, the sealing between the tank cover and the tank is poor, which can easily cause the toxic gas in the tank to leak into the workshop. The ventilation equipment in the workshop has a low ventilation efficiency, making it difficult to evacuate the toxic gas to the outside of the workshop in time, so it needs to be improved. Utility Model Content

[0003] The purpose of the present application is to provide a hazardous gas emergency evacuation device for chemical safety, so as to evacuate leaked toxic gases in a timely and efficient manner.

[0004] The present application provides a chemical safety hazardous gas emergency evacuation device that adopts the following technical solution:

[0005] A hazardous gas emergency evacuation device for chemical safety, comprising a ventilation pipe and a negative pressure source connected to the ventilation pipe, and also comprising a mounting bracket, a gas collecting hood, a sealing hood, a driving assembly, a detection member and a control key; the gas collecting hood is mounted on the mounting bracket and is configured to be arranged above a tank body for producing chemicals, and the gas collecting hood is connected to the ventilation pipe; the sealing hood is sleeved on the gas collecting hood, and the sealing hood can slide relative to the gas collecting hood in the up and down directions, and the sealing hood is used to cover the tank body; the driving assembly connects the sealing hood and the mounting bracket, and the driving assembly is used to drive the sealing hood to slide; the detection member is used to detect gas leaking from the tank body; the negative pressure source, the driving assembly and the detection member are all controlled by the control member.

[0006] By adopting the above technical solution, when the detection component detects the target gas, it indicates that the gas in the tank body has leaked. The control component controls the driving component to drive the sealing cover to slide downward so that the sealing cover is covered on the corresponding tank body to reduce the possibility of further diffusion of the gas; the control component operates the negative pressure source to form a negative pressure in the ventilation pipe, so that the toxic gas in the sealing cover is sucked into the gas collecting hood and flows into the ventilation pipe, so that the leaked toxic gas can be evacuated outside the workshop in time.

[0007] Preferably, the driving assembly includes a rotating roller, a traction rope and a driving motor; the rotating roller is rotatably arranged on the mounting bracket; the traction rope is wound on the rotating roller, and the traction rope is connected to the sealing cover; the driving motor is arranged on the mounting bracket and is configured to drive the rotating roller to rotate, and the driving motor is controlled by a control component.

[0008] By adopting the above technical solution, the driving motor drives the rotating roller to rotate, and the rotating roller reels the traction rope, so that the sealing cover can slide upward; when the rotating roller unwinds the traction rope, the sealing cover slides downward under the action of its own gravity.

[0009] Preferably, the sealing cover is provided with a ventilation port, which connects the inside and outside of the sealing cover. A sealing cover plate is rotatably provided on the inner wall of the sealing cover, and the sealing cover plate can be rotated toward the inside of the sealing cover. The sealing cover plate is configured to block the ventilation port.

[0010] By adopting the above technical solution, when negative pressure is formed in the sealing cover during the process of the gas in the sealing cover flowing toward the ventilation pipe, the sealing cover plate can be rotated toward the inside of the sealing cover under the action of air pressure to open the ventilation port, so that the gas outside the sealing cover can flow to the inside of the sealing cover, and the inflowing gas can drive the toxic gas in the sealing cover to flow synchronously into the gas collecting hood and toward the ventilation pipe, thereby helping to improve the evacuation efficiency of the toxic gas.

[0011] Preferably, the sealing cover is provided with an elastic member, the elastic member connects the sealing cover plate and the sealing cover, and the elastic member is configured to exert an elastic force on the sealing cover plate in a direction toward the ventilation port.

[0012] By adopting the above technical solution, the elastic member can keep the sealing cover plate in contact with the inner wall of the sealing cover, so as to improve the sealing performance of the sealing cover plate in blocking the ventilation port and reduce the possibility of toxic gas in the sealing cover leaking from the ventilation port.

[0013] Preferably, the ventilation port is arranged at the lower end of the sealing cover.

[0014] By adopting the above technical solution, after the gas outside the sealing cover flows into the sealing cover through the ventilation port, the inflowing gas can flow upward to drive the toxic gas leaked from the tank body to flow upward into the gas collecting hood and the ventilation pipe, which is beneficial to further improve the evacuation efficiency of the toxic gas.

[0015] Preferably, the sealing cover is provided with a sealing ring, and the sealing ring is configured to abut against a platform for mounting the tank body.

[0016] By adopting the above technical solution, the sealing ring can improve the sealing between the sealing cover and the platform for installing the tank body, which is helpful to reduce the possibility of leakage of toxic gases.

[0017] Preferably, a deformation cavity is provided inside the sealing ring.

[0018] By adopting the above technical solution, the deformable cavity facilitates the deformation of the sealing ring, which is beneficial to further improve the sealing between the sealing ring and the platform for mounting the tank body.

[0019] Preferably, the ventilation pipe is connected to the upper end of the air collecting hood, and the inner wall of the upper end of the air collecting hood is inclined toward the ventilation pipe.

[0020] By adopting the above technical solution, the inclined inner wall of the gas collecting hood has a guiding effect on the gas in the gas collecting hood, so that the gas flowing into the gas collecting hood is convenient to flow into the ventilation pipe.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. When the detection component detects the target gas, it indicates that the gas in the tank body is leaking. The control component controls the driving component to drive the sealing cover to slide downward, so that the sealing cover is set on the corresponding tank body to reduce the possibility of further diffusion of the gas; the control component operates the negative pressure source to form a negative pressure in the ventilation pipe, so that the toxic gas in the sealing cover is sucked into the gas collecting cover and flows into the ventilation pipe, so that the leaked toxic gas can be evacuated outside the workshop in time;

[0023] 2. The ventilation port allows the gas outside the sealing cover to flow into the inside of the sealing cover, so that the inflowing gas drives the toxic gas in the sealing cover to flow into the gas collecting cover and to the ventilation pipe synchronously, thereby facilitating the evacuation efficiency of the toxic gas;

[0024] 3. The sealing ring can improve the sealing between the sealing cover and the platform for installing the tank body, which is helpful to reduce the possibility of leakage of toxic gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a hazardous gas emergency evacuation device for chemical safety in the present application.

[0026] Figure 2 is along Figure 1 Schematic diagram of the AA line section.

[0027] Figure 3 yes Figure 2 Enlarged view of part B in .

[0028] Explanation of the reference numerals in the accompanying drawings: 1. ventilation duct; 2. negative pressure source; 3. mounting bracket; 4. air collecting hood; 5. sealing hood; 51. sealing ring; 511. deformation cavity; 52. ventilation port; 53. sealing cover plate; 54. elastic member; 6. driving assembly; 61. rotating roller; 62. traction rope; 63. driving motor. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0030] The present application embodiment discloses a hazardous gas emergency evacuation device for chemical safety. Figure 1 and Figure 2 , including a ventilation pipe 1, a negative pressure source 2, a mounting bracket 3, an air collecting hood 4, a sealing hood 5, a driving assembly 6, a detection component (not shown in the figure) and a control component (not shown in the figure).

[0031] The gas collecting hood 4 is in the shape of a shell with an opening at the lower end, the ventilation pipe 1 is fixedly connected to the upper end wall of the gas collecting hood 4, and the inner wall of the upper end of the gas collecting hood 4 is inclined toward the ventilation pipe 1, so that the upper end of the gas collecting hood 4 is conical. The mounting bracket 3 is used to be fixedly connected to the top of the workshop, and the gas collecting hood 4 is fixedly mounted on the mounting bracket 3, and the gas collecting hood 4 can be located above the tank for generating chemicals. The negative pressure source 2 includes a negative pressure fan, and the negative pressure source 2 is connected to one end of the ventilation pipe 1 away from the gas collecting hood 4, so as to discharge the gas in the ventilation pipe 1 to the outside of the workshop. In another embodiment, the ventilation pipe 1 can be fixedly connected to the top of the workshop.

[0032] The sealing cover 5 is in the shape of a shell with a hollow interior and two ends passing through. The sealing cover 5 is sleeved on the outside of the gas collecting cover 4, and the inner peripheral wall of the sealing cover 5 is in contact with the outer peripheral wall of the gas collecting cover 4; the sealing cover 5 can slide relative to the gas collecting cover 4 in the up and down direction, and the sealing cover 5 can set the corresponding tank cover inside to reduce the possibility of diffusion of toxic gas leaked from the tank. The driving component 6 connects the sealing cover 5 and the mounting bracket 3 to drive the sealing cover 5 to slide.

[0033] The control unit includes a PLC, and the negative pressure source 2 is electrically connected to the control unit; the detection unit includes a gas detector, and the detection unit is electrically connected to the control unit. The detection unit is used to be installed at the position where the tank body and the tank cover meet, so as to detect the gas in the tank body. The driving component 6 is controlled by the control unit; when the detection unit detects the target gas, the control unit causes the driving component 6 to drive the sealing cover 5 to move downward to set the tank body cover inside; the control unit starts the negative pressure source 2, and the negative pressure source 2 forms a negative pressure in the ventilation pipe 1, so that the gas in the sealing cover 5 and the gas collecting cover 4 can be discharged from the ventilation pipe 1 to the outside of the workshop, so as to achieve the effect of timely evacuation of toxic gases.

[0034] A plurality of drive components 6 are arranged in sequence along the circumference of the air collecting hood 4; the drive component 6 includes a rotating roller 61, a traction rope 62 and a driving motor 63. The rotating roller 61 is rotatably connected to the mounting bracket 3; the traction rope 62 is wound around the rotating roller 61, and one end of the traction rope 62 is fixedly connected to the sealing hood 5; the driving motor 63 is fixedly connected to the mounting bracket 3, and the output shaft of the driving motor 63 is connected to the rotating roller 61 to drive the rotating roller 61 to rotate. The driving motor 63 is electrically connected to the control member. When the control member causes the output shaft of the driving motor 63 to rotate forward, the rotating roller 61 winds up the traction rope 62, which can make the sealing hood 5 slide upward; when the control member causes the output shaft of the driving motor 63 to reverse, the rotating roller 61 unwinds the traction rope 62, which can make the sealing hood 5 slide downward under its own gravity to cover the corresponding tank body. In another embodiment, the driving member can be a cylinder or a hydraulic cylinder or an electric push rod or other structural member.

[0035] Reference Figure 2 and Figure 3 The lower end of the sealing cover 5 is provided with a sealing ring 51, which is a rubber ring and is bonded and fixed to the lower end wall of the sealing cover 5. When the sealing cover 5 slides downward, the sealing ring 51 can abut against the platform for mounting the tank body to improve the sealing performance of the connection between the sealing cover 5 and the platform. A deformation cavity 511 is integrally formed inside the sealing ring 51 to facilitate the deformation of the sealing ring 51, so that the sealing ring 51 can be fully fitted with the platform. The platform for mounting the tank body can be a flat plate or the ground.

[0036] The outer peripheral wall of the sealing cover 5 is provided with a ventilation port 52, which is located at the lower end of the sealing cover 5 and communicates the inside and outside of the sealing cover 5. The sealing cover 5 is provided with a sealing cover plate 53, which is located inside the sealing cover 5; the sealing cover plate 53 is improved above the ventilation port 52, and the upper end of the sealing cover plate 53 is rotatably connected to the inner wall of the sealing cover 5, so that the sealing cover plate 53 can rotate toward the inside of the sealing cover 5.

[0037] The sealing cover 5 is provided with an elastic member 54, which includes a torsion spring. The elastic member 54 is sleeved on the rotating shaft of the sealing cover plate 53, and one end of the elastic member 54 is connected to the sealing cover plate 53, and the other end of the elastic member 54 is connected to the sealing cover plate 53. The elastic member 54 is in a twisted state, and the elastic member 54 has an elastic force on the sealing cover plate 53 to make the sealing cover plate 53 face the ventilation port 52, so that the sealing cover plate 53 and the inner wall of the sealing cover 5 are kept in contact to block the ventilation port 52. When the air pressure inside the sealing cover 5 is lower than the air pressure outside the sealing cover 5, the sealing cover plate 53 can automatically rotate toward the inside of the sealing cover 5 to open the ventilation port 52, so as to balance the air pressure inside and outside the sealing cover 5, so as to facilitate the gas inside the sealing cover 5 to flow from the gas collecting cover 4 to the ventilation pipe 1.

[0038] In another embodiment, the elastic member 54 may be omitted, and the sealing cover plate 53 may block the ventilation port 52 under the action of its own gravity.

[0039] The implementation principle of a hazardous gas emergency evacuation device for chemical safety in an embodiment of the present application is as follows: when the detection component detects the target gas, it indicates that the gas in the tank body has leaked, and the control component controls the drive motor 63, so that the drive motor 63 causes the rotating roller 61 to unwind the traction rope 62, so that the sealing cover 5 slides downward, so that the sealing cover 5 is covered on the corresponding tank body to reduce the possibility of further diffusion of the gas; the control component operates the negative pressure source 2, so that a negative pressure is formed in the ventilation pipe 1, so that the toxic gas in the sealing cover 5 is sucked into the gas collecting hood 4 and flows into the ventilation pipe 1, so that the leaked toxic gas can be evacuated to the outside of the workshop in time.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hazardous gas emergency evacuation device for chemical safety, comprising a ventilation pipe (1) and a negative pressure source (2) connected to the ventilation pipe (1), characterized in that: Also includes: Mounting bracket (3); A gas collecting hood (4) mounted on the mounting bracket (3) and configured to be arranged above a tank for producing chemicals, wherein the gas collecting hood (4) is connected to the ventilation pipe (1); A sealing cover (5) is sleeved on the gas collecting cover (4), the sealing cover (5) can slide relative to the gas collecting cover (4) in an up-down direction, and the sealing cover (5) is used to cover the tank body; A driving assembly (6) connected to the sealing cover (5) and the mounting bracket (3), wherein the driving assembly (6) is used to drive the sealing cover (5) to slide; Detection parts, used to detect gas leakage from the tank; A control component, wherein the negative pressure source (2), the driving component (6) and the detection component are all controlled by the control component.

2. The chemical safety hazardous gas emergency evacuation device according to claim 1, characterized in that: The driving assembly (6) comprises: A rotating roller (61) rotatably mounted on the mounting bracket (3); A traction rope (62) is wound on the rotating roller (61), and the traction rope (62) is connected to the sealing cover (5); A driving motor (63) is disposed on the mounting bracket (3) and is configured to drive the rotating roller (61) to rotate. The driving motor (63) is controlled by a control component.

3. The chemical safety hazardous gas emergency evacuation device according to claim 1, characterized in that: The sealing cover (5) is provided with a ventilation port (52), and the ventilation port (52) communicates with the inside and outside of the sealing cover (5). A sealing cover plate (53) is rotatably provided on the inner wall of the sealing cover (5), and the sealing cover plate (53) can be rotated toward the inside of the sealing cover (5). The sealing cover plate (53) is configured to block the ventilation port (52).

4. The chemical safety hazardous gas emergency evacuation device according to claim 3 is characterized by: The sealing cover (5) is provided with an elastic member (54), the elastic member (54) connecting the sealing cover plate (53) and the sealing cover (5), and the elastic member (54) is configured to exert an elastic force on the sealing cover plate (53) in a direction toward the ventilation port (52).

5. The chemical safety hazardous gas emergency evacuation device according to claim 3 is characterized by: The ventilation port (52) is arranged at the lower end of the sealing cover (5).

6. The chemical safety hazardous gas emergency evacuation device according to claim 1, characterized in that: The sealing cover (5) is provided with a sealing ring (51), and the sealing ring (51) is configured to abut against a platform for mounting a tank body.

7. The chemical safety hazardous gas emergency evacuation device according to claim 6, characterized in that: A deformation cavity (511) is provided inside the sealing ring (51).

8. The chemical safety hazardous gas emergency evacuation device according to claim 1, characterized in that: The ventilation pipe (1) is connected to the upper end of the air collecting hood (4), and the inner wall of the upper end of the air collecting hood (4) is arranged to be inclined towards the ventilation pipe (1).

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