Dual prevention device for chemical safety

Abstract

The utility model provides a dual prevention device for chemical safety, and relates to the technical field of chemical safety, the dual prevention device for chemical safety comprises a pipeline, the top of the pipeline is provided with an upper sealing cover, the bottom of the upper sealing cover is provided with a lower sealing cover, and the rear sides of the upper sealing cover and the lower sealing cover are fixedly connected with a connecting rotating shaft; threaded holes are formed in the outer side of the upper sealing cover and the outer side of the lower sealing cover, threaded nails are arranged on the inner side of the upper sealing cover and are in threaded connection with the threaded holes, a bottom shell is slidably connected to the outer side of the pipeline, and a fixed sealing plate is slidably connected to the inner side of the bottom shell. According to the utility model, liquid can be collected into the lower sealing cover through the upper sealing cover and the lower sealing cover, the liquid sensor on the inner side of the lower sealing cover is triggered, and the alarm lamp is turned on through the signal receiver to give an alarm, so that the efficiency of the sensor is improved, chemical liquid is prevented from flowing out through secondary sealing, and greater loss is avoided.

Description

Technical Field

[0001] This utility model relates to the field of chemical safety technology, and in particular to a dual-prevention device for chemical safety. Background Technology

[0002] Chemical safety refers to the measures and means taken in all aspects of chemical production, storage, transportation and use to ensure that personnel, equipment, environment and the entire chemical system are protected from various hazardous factors, so as to achieve safe, stable and reliable operation of chemical production activities. Among them, when chemical products are transported through pipelines, in order to ensure the safety and controllability of chemical transportation, dual prevention devices for chemical safety are required.

[0003] Chemical safety dual prevention devices refer to devices with a dual prevention mechanism of risk classification and control and hidden danger investigation and management. It is a systematic safety management system that uses a variety of technologies and management methods to effectively prevent and control chemical safety risks and manage hidden dangers. It is an important method for ensuring the safety of personnel and products during the transportation of chemical products.

[0004] In the prior art, such as Chinese Patent Publication No. CN217213927U, a dual-prevention device for chemical safety is disclosed, including a protective box, a top cover, pipes, and valves. The inner bottom wall of the protective box is fixedly installed with mounting columns corresponding to the connection points of the valves and pipes. A collection frame is fixedly installed at the top of the mounting columns. A semi-circular groove is opened inside the collection frame, and a liquid sensor is embedded in the inner bottom wall of the semi-circular groove. A PLC controller and an alarm light are respectively provided on the inner top wall and the upper surface of the top cover.

[0005] However, the aforementioned patents have the following shortcomings:

[0006] The device involved in the aforementioned patent utilizes a semi-circular groove placed at the bottom of the pipe connection. A liquid sensor embedded in the inner wall of the groove detects whether there is a leak at the interface. A PLC controller automatically activates an alarm light, allowing personnel to perform maintenance and repairs at the initial stage of leakage, preventing further deterioration and accumulation of leaks, effectively avoiding greater losses. However, its shortcomings are as follows:

[0007] The semi-circular groove is only placed at the bottom of the pipe connection. During pipeline transportation, there are often situations where the pressure inside the pipe is high. When liquid leaks from the gap in the connection, the huge pressure and narrow gap cause the leaking chemical liquid to spray out of the pipe in a jet manner. This prevents it from flowing into the semi-circular groove and triggering the liquid sensor inside. The semi-circular groove lacks comprehensive collection of leaking liquid at the pipe connection, which reduces the efficiency of the liquid sensor. Moreover, if the construction personnel do not have time to repair, the chemical liquid accumulates and flows out, increasing the risk and loss.

[0008] Therefore, we proposed a dual-prevention device for chemical safety to address the problems mentioned above. Utility Model Content

[0009] The pipeline is fixed with an upper sealing cover at the top and a lower sealing cover at the bottom. The threaded holes on the outer sides of the upper and lower sealing covers are threadedly connected to the threaded nails to achieve a locking mechanism. Located outside the pipeline flange and sealed to the pipeline, they form a secondary container that can both contain leaking liquid and form a secondary seal with the pipeline, effectively preventing the outflow of chemical liquids. When the flange leaks, regardless of whether the liquid sprays from above or seeps from the side or bottom, the upper and lower sealing covers can collect the liquid into the lower sealing cover, triggering the liquid sensor inside the lower sealing cover. The signal receiver then activates the alarm light. This not only improves the efficiency of the sensor but also strengthens the secondary seal, preventing greater losses caused by the outflow of chemical liquids. If the liquid sensor is damaged, the upper and lower sealing covers will also leak, and the chemical liquid will seep into the bottom shell outside the pipeline. The bottom shell has side sealing plates at the front and back and a top plate at the top, which are relatively sealed. As the leaked liquid accumulates, the liquid level rises, causing the sliding float inside the bottom shell to float. Because the bottom shell is equipped with a sliding cylinder, the float slides inside the sliding cylinder. The bottom limiting block can not only limit the movement but also increase the sensitivity of the float. When the float rises and touches the alarm bar, it pushes the alarm bar to rise in the alarm sliding hole, thereby realizing a secondary alarm. This further strengthens the detection and protection of chemical leaks, improves overall safety, and solves the problems mentioned in the background technology.

[0010] To achieve the above objectives, this utility model adopts the following technical solution: a dual-prevention device for chemical safety, comprising a pipeline, an upper sealing cover at the top of the pipeline, a lower sealing cover at the bottom of the upper sealing cover, a connecting shaft fixedly connected to the rear side of the upper and lower sealing covers, threaded holes on the outer sides of both the upper and lower sealing covers, a threaded pin on the inner side of the upper sealing cover, the threaded pin being threadedly connected to the threaded hole, a bottom shell slidably connected to the outer side of the pipeline, a fixed sealing plate slidably connected to the inner side of the bottom shell, side sealing plates slidably connected to the front and rear sides of the bottom shell, a top plate on the top of the two side sealing plates, an alarm sliding hole on the inner side of the top plate, the top plate being slidably connected to the bottom shell and the fixed sealing plate in sequence, a liquid sensor fixedly connected to the inner side of the lower sealing cover, a protective cover fixedly connected to the inner wall of the bottom shell, a signal receiver on the inner side of the protective cover, an alarm light fixedly connected to the outer side of the bottom shell, and a secondary alarm mechanism on the inner side of the bottom shell.

[0011] Preferably, the secondary alarm mechanism includes a slide cylinder, which is fixedly connected to the inner side of the bottom shell. A sliding float is slidably connected to the inner side of the slide cylinder. A limit block is fixedly connected to the bottom of the sliding float. An alarm rod is provided on the top of the sliding float, and the alarm rod is slidably connected to the alarm sliding hole.

[0012] Preferably, the alarm stick is slidably connected to the alarm sliding hole, the limiting block is made of the same foam material as the sliding float, and the cross-sectional area of ​​the limiting block is larger than the cross-sectional area of ​​the inner side of the slide cylinder.

[0013] Preferably, a sliding groove is provided on the inner side of the bottom shell, a sliding rod is slidably connected in the sliding groove, and a strong float is fixedly connected to the sliding rod.

[0014] Preferably, a material box is fixedly connected to the top of the powerful float, a desiccant is provided on the inside of the material box, and multiple ventilation holes are opened around the material box.

[0015] Preferably, the left and right sides of the side sealing plate are convex, which are the same shape as the concave groove of the corresponding sliding position of the bottom shell and slightly smaller than the inner space of the concave groove. An alarm ball lamp fixing groove is provided on the outer side of the bottom shell.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0017] 1. In this utility model, an upper sealing cover is fixed to the top of the pipe and a lower sealing cover is fixed to the bottom. The threaded holes on the outer sides of the two are threadedly connected to the threaded nails to achieve engagement. Located outside the pipe flange and sealed with the pipe, they form a secondary container that can contain leaked liquid. They form a secondary seal with the pipe to prevent the chemical liquid from flowing out. When the flange leaks, regardless of whether the liquid sprays from above or seeps from the side or bottom, the upper and lower sealing covers can collect the liquid into the lower sealing cover. The liquid sensor inside the lower sealing cover is triggered, and the alarm light is activated by the signal receiver. This not only improves the efficiency of the sensor but also provides a secondary seal to prevent the chemical liquid from flowing out, avoiding greater losses.

[0018] 2. In this utility model, if the liquid sensor is damaged, the upper and lower sealing covers will also leak, and the chemical liquid will seep into the bottom shell outside the pipeline. The bottom shell has side sealing plates at the front and back and a top plate at the top, which are relatively sealed. As the liquid increases and accumulates, the liquid level rises, causing the sliding float in the bottom shell to float up. There is a sliding cylinder in the bottom shell, and the float slides in the sliding cylinder. The bottom limiting block can both limit the movement and increase the sensitivity of the float. When the float floats up and touches the alarm rod, it pushes it to rise in the alarm sliding hole, realizing a secondary alarm, strengthening the detection and protection of chemical leaks, and improving safety. Attached Figure Description

[0019] Figure 1 This utility model provides a perspective view of the main structure of a dual-prevention device for chemical safety.

[0020] Figure 2 This utility model provides a three-dimensional structural breakdown view of a dual-prevention device for chemical safety.

[0021] Figure 3 This utility model provides a partial structural sectional perspective view of a dual-prevention device for chemical safety.

[0022] Figure 4 This utility model presents a three-dimensional structural disassembly of the secondary alarm mechanism in a dual-prevention device for chemical safety.

[0023] Legend: 1. Pipeline; 2. Secondary alarm mechanism; 201. Slide cylinder; 202. Sliding float; 203. Alarm bar; 204. Limiting block; 3. Upper sealing cover; 4. Lower sealing cover; 5. Threaded hole; 6. Threaded nail; 7. Connecting shaft; 8. Liquid sensor; 9. Protective cover; 10. Signal receiver; 11. Alarm light; 12. Bottom shell; 13. Fixed sealing plate; 14. Side sealing plate; 15. Top plate; 16. Alarm sliding hole; 17. Slide groove; 18. Slide bar; 19. Heavy float; 20. Material box; 21. Desiccant. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can also be implemented in other ways than those described herein, and therefore the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Example 1, as shown in the attached document Figure 1 , Figure 2 and Figure 3 As shown, a dual-prevention device for chemical safety includes a pipe 1. An upper sealing cover 3 is installed at the top of the pipe 1, and a lower sealing cover 4 is installed at the bottom of the upper sealing cover 3. A connecting shaft 7 is fixedly connected to the rear side of the upper sealing cover 3 and the lower sealing cover 4. Threaded holes 5 are provided on the outer sides of both the upper sealing cover 3 and the lower sealing cover 4. A threaded pin 6 is installed on the inner side of the upper sealing cover 3, and the threaded pin 6 is threadedly connected to the threaded hole 5. A bottom shell 12 is slidably connected to the outer side of the pipe 1, and a fixed sealing plate 13 is slidably connected to the inner side of the bottom shell 12. Side sealing plates 14 are slidably connected to the front and rear sides of 2. A top plate 15 is provided on the top of the two side sealing plates 14. An alarm sliding hole 16 is opened on the inner side of the top plate 15. The top plate 15 is slidably connected to the bottom shell 12 and the fixed sealing plate 13 in sequence. A liquid sensor 8 is fixedly connected to the inner side of the lower sealing cover 4. A protective cover 9 is fixedly connected to the inner wall of the bottom shell 12. A signal receiver 10 is provided on the inner side of the protective cover 9. An alarm light 11 is fixedly connected to the outer side of the bottom shell 12. A secondary alarm mechanism 2 is provided on the inner side of the bottom shell 12.

[0027] The effect achieved by the entire embodiment 1 is as follows: the threaded nail 6 and the upper sealing cover 3 are threadedly connected to the threaded hole 5 on the lower sealing cover 4, fixing the upper sealing cover 3 and the lower sealing cover 4. The upper sealing cover 3 and the lower sealing cover 4 are located outside the flange connection of the pipe 1 and are sealed to the pipe 1. The upper sealing cover 3 and the lower sealing cover 4 in the sealed state can form a secondary container to contain the leaked chemical liquid and to seal the connection of the pipe 1. The liquid sensor 8 is fixed inside the lower sealing cover 4 to sense the liquid and send a signal. The fixed sealing plate 13 is slidably connected to the bottom shell 12 and then engaged to fix the bottom shell 12 to the pipe 1. The side sealing plate 14 is engaged with the bottom shell 12 to form a sealed box. The protective cover 9 on the inner wall of the bottom shell 12 is used to protect the signal receiver 10. Then the signal receiver 10 transmits the signal through the alarm light 11.

[0028] Example 2, as Figure 2 and Figure 4As shown, the secondary alarm mechanism 2 includes a slide cylinder 201, which is fixedly connected to the inner side of the bottom shell 12. A sliding float 202 is slidably connected to the inner side of the slide cylinder 201. A limit block 204 is fixedly connected to the bottom of the sliding float 202. An alarm rod 203 is provided on the top of the sliding float 202. The alarm rod 203 is slidably connected to the alarm sliding hole 16.

[0029] The effect achieved by the entire embodiment 2 is as follows: the slide cylinder 201 is used to ensure that the sliding float 202 can float up and down stably, and the bottom of the sliding float 202 is fixed with a limit block 204. The limit block 204 limits the upward sliding float 202 to prevent it from floating too much and disengaging from the slide cylinder 201. The buoyancy of the limit block 204 itself can increase the sensitivity of the sliding float 202. When the upward sliding float 202 slides to touch the alarm bar 203 at the top, the alarm bar 203 is pushed by the upward sliding float 202 to slide up in the alarm sliding hole 16, thereby realizing a secondary alarm.

[0030] Example 3, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the alarm rod 203 is slidably connected to the alarm sliding hole 16. The limiting block 204 is made of the same foam material as the sliding float 202. The cross-sectional area of ​​the limiting block 204 is larger than the cross-sectional area of ​​the inner side of the slide cylinder 201. The inner side of the bottom shell 12 is provided with a sliding groove 17. A sliding rod 18 is slidably connected in the sliding groove 17. A strong float 19 is fixedly connected to the sliding rod 18. A material box 20 is fixedly connected to the top of the strong float 19. A desiccant 21 is provided inside the material box 20. Multiple ventilation holes are provided around the material box 20. The left and right sides of the side sealing plate 14 are convex, which are the same shape as the concave groove of the corresponding sliding position of the bottom shell 12 and slightly smaller than the inner space of the concave groove. An alarm spherical lamp fixing groove is provided on the outer side of the bottom shell 12.

[0031] The overall effect achieved by embodiment 3 is as follows: the limiting block 204 is made of the same foam material as the sliding float 202, which can ensure that the limiting block 204 increases the buoyancy support of the sliding float 202 while limiting the sliding float 202 to prevent it from disengaging, thus increasing sensitivity. The upward floating of the strong float 19 will lift the sliding rod 18 sliding in the groove 17 on the bottom shell 12, thereby driving the material box 20 to float, preventing the desiccant 21 on the material box 20 from being damaged by water. The holes opened on the material box 20 increase the contact area between the internal desiccant 21 and the external air, so that the desiccant 21 can be fully utilized to absorb the moisture in the air inside the device, reducing the risk of rust in the internal device. The outer side of the bottom shell 12 is provided with an alarm ball lamp fixing groove to better fix the alarm lamp 11. The convex sides of the side sealing plate 14 engage with the concave sides of the corresponding sliding position of the bottom shell 12, increasing the sealing of the device.

[0032] The working principle of the entire device is as follows: During actual use, the upper sealing cover 3 is installed at the top of the pipe 1, and the lower sealing cover 4 is installed at the bottom of the upper sealing cover 3. The threaded holes 5 on the outer sides of the upper sealing cover 3 and the lower sealing cover 4 are threadedly connected to the threaded pins 6, so that the upper sealing cover 3 and the lower sealing cover 4 are engaged. The upper sealing cover 3 and the lower sealing cover 4 are located outside the flange connection of the pipe 1 and are sealed to the pipe 1. The upper sealing cover 3 and the lower sealing cover 4 in the sealed state form a secondary container, which can contain the leaked chemical liquid and seal the connection of the pipe 1 again to prevent it from flowing to the outside. When a leak occurs at the flange of pipe 1 connection, regardless of whether the leak is a jet from above the connection, a side leak, or a leak from the bottom, the engaging upper sealing cover 3 and lower sealing cover 4 can collect the leaked chemical liquid and allow it to flow into the lower sealing cover 4. Since a liquid sensor 8 is fixed inside the lower sealing cover 4, the liquid sensor 8 is triggered, thereby activating the alarm light 11 through the signal receiver 10. This improves the efficiency of the use of the liquid sensor 8 and provides a secondary seal for pipe 1, preventing the chemical liquid from leaking out and increasing risks and losses if construction personnel do not have time to repair it.

[0033] If the liquid sensor 8 is damaged, the upper sealing cover 3 and the lower sealing cover 4 will also lose their sealing protection for the chemical liquid. The chemical liquid will seep out and flow into the outer bottom shell 12 of the pipe 1. Because the bottom shell 12 has sliding side sealing plates 14 on its front and rear sides, and the top of the side sealing plates 14 is provided with a top plate 15, which is relatively sealed, when the liquid outflow increases, it accumulates in the sealed bottom shell 12 and rises with the liquid level, causing the sliding float 202 inside the bottom shell 12 to float up. Because the inner side of the bottom shell 12 is fixed with a sliding cylinder 201, and the inner side of the sliding cylinder 201 has sliding float 202, the liquid will seep out and accumulate in the sealed bottom shell 12. 02. Therefore, the sliding float 202 slides and floats upward inside the slide cylinder 201, and the bottom of the sliding float 202 is fixed with a limit block 204. The limit block 204 limits the upward sliding float 202, and the buoyancy of the limit block 204 itself can increase the sensitivity of the sliding float 202. The upward sliding float 202 slides to touch the alarm rod 203 at the top. The alarm rod 203 is pushed by the upward sliding float 202 and slides upward in the alarm sliding hole 16, thereby realizing a secondary alarm, enhancing the detection and protection of chemical leaks, and improving safety.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. Double prevention device for chemical safety, characterized by: The utility model provides a pipeline (1), the top of pipeline (1) is provided with upper seal cover (3), the bottom of upper seal cover (3) is provided with lower seal cover (4), the rear side of upper seal cover (3) and lower seal cover (4) is fixedly connected with the connecting pivot (7), the outside of upper seal cover (3) and lower seal cover (4) is all seted up the threaded hole (5), the inside of upper seal cover (3) is provided with threaded peg (6), threaded peg (6) is connected with threaded hole (5) threadedly, the outside of pipeline (1) is slidably connected with bottom shell (12), the inside of bottom shell (12) is slidably connected with fixed seal plate (13), the front and rear sides of bottom shell (12) are slidably connected with side seal plate (14), the top of two side seal plate (14) is provided with top plate (15), the inside of top plate (15) is seted up alarm sliding hole (16), top plate (15) is slidably connected with bottom shell (12) and fixed seal plate (13) in proper order, the inside of lower seal cover (4) is fixedly connected with liquid sensor (8), the inner wall of bottom shell (12) is fixedly connected with protective cover (9), the inside of protective cover (9) is provided with signal receiver (10), the outside of bottom shell (12) is fixedly connected with alarm lamp (11), the inside of bottom shell (12) is provided with secondary alarm mechanism (2).

2. The double prevention device for chemical safety according to claim 1, characterized by: The secondary alarm mechanism (2) includes a sliding cylinder (201) fixedly connected to the inside of the bottom shell (12), a sliding float (202) slidably connected to the inside of the sliding cylinder (201), a limit block (204) fixedly connected to the bottom of the sliding float (202), and an alarm rod (203) provided on the top of the sliding float (202).

3. The double prevention device for chemical safety according to claim 2, characterized by: The alarm rod (203) is slidably connected to the alarm sliding hole (16), the limit block (204) is made of foam material, and the cross-sectional area of the limit block (204) is larger than that of the inside of the sliding cylinder (201).

4. The double prevention device for chemical safety according to claim 1, characterized by: The inside of the bottom shell (12) is provided with a sliding groove (17), and a sliding rod (18) is slidably connected to the sliding groove (17).

5. The double prevention device for chemical safety according to claim 4, characterized by: The top of the sliding rod (18) is fixedly connected to a strong float (19).

6. The dual prevention device for chemical safety according to claim 1, characterized by: The top of the strong float (19) is fixedly connected to a material box (20), the inside of the material box (20) is provided with a drying agent (21), and a plurality of air holes are formed around the material box (20). The left and right sides of the side seal plate (14) are convex, the shape of the side seal plate (14) is consistent with the shape of the concave groove of the corresponding sliding position of the bottom shell (12), and the size of the inside of the side seal plate (14) is slightly smaller than that of the concave groove. The outside of the bottom shell (12) is provided with an alarm spherical lamp fixing groove.

Images