A high-safety explosion-proof power distribution device

Abstract

The invention relates to a high-safety explosion-proof power distribution device applied to the field of explosion-proof cabinets. When in use, the leaked argon fills the hollow cavity and fills the gas storage tank through the upper one-way gas valve and the front gas pipe. The argon stored in the gas storage tank enters the interior of the explosion-proof cabinet through the branch pipe and the lower one-way gas valve. Through the above arrangement, the argon leaked to the outside can be collected and reused, saving the consumption of argon. At the same time, when the collected argon is reused, the interior of the explosion-proof cabinet is restored to a normal pressure state, and the operating time of the gas supply equipment supplied by the gas supply pipe is reduced, so that the service life of the gas source equipment can be extended, and the maintenance and replacement costs can be reduced. Maintaining positive pressure for a long time will cause continuous mechanical stress to the seals and electronic components in the explosion-proof cabinet. Intermittently restoring normal pressure helps to release these stresses, avoiding potential damage to the components and seals in a long-term high-pressure environment, thereby extending the service life of the seals and electronic components and reducing the maintenance frequency.

Description

Technical Field

[0001] The invention relates to a high-safety explosion-proof power distribution device, in particular to a high-safety explosion-proof power distribution device applied in the field of explosion-proof cabinets. Background Art

[0002] Explosion-proof distribution box is a common explosion-proof distribution device. It is a special electrical equipment used to prevent electrical equipment from causing explosions in flammable and explosive environments. Explosion-proof means preventing explosive mixtures from causing explosions when encountering sparks, high temperatures or arcs from electrical equipment.

[0003] Positive pressure explosion-proof distribution box is an electrical device that prevents the entry of external explosive gas or dust by maintaining positive pressure inside the equipment. The working principle of positive pressure explosion-proof distribution box is to fill the distribution box with protective gas and keep the internal air pressure higher than the external environment pressure to form a positive pressure environment. The protective gas can be argon, which can provide a higher level of protection, especially in extreme environments or applications with high precision requirements.

[0004] Since the cost of argon is relatively high and argon is directly discharged into the air during use, it will cause waste of argon, leading to further increase in the cost of use. In addition, since the inside of the distribution box needs to maintain a positive pressure state at all times, some electronic components and sealing rings inside the distribution box will be subjected to continuous mechanical stress, reducing their service life, so further improvement is needed. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that argon gas is directly discharged into the air during the use of the positive pressure explosion-proof distribution box, which will cause waste of argon gas and further increase the cost of use.

[0006] To solve the above problems, the present invention provides a high-safety explosion-proof power distribution device. The high-safety explosion-proof power distribution device includes a base plate, an explosion-proof cabinet is installed on the top of the base plate, one end of the explosion-proof cabinet is fixedly connected to an air supply pipe, and one end of the air supply pipe is fixedly connected to an air valve, characterized in that: an outer cover is provided on the outer side of the explosion-proof cabinet, the bottom end of the outer cover is fixedly connected to the base plate, a hollow cavity is arranged between the explosion-proof cabinet and the outer cover, a front air pipe and a rear air pipe are arranged on one side of the outer cover, an air storage tank is fixedly connected between one end of the front air pipe and one end of the rear air pipe, the other end of the front air pipe is fixedly connected to the outer cover and is communicated with the hollow cavity, one end of the front air pipe close to the outer cover is fixedly connected to a branch pipe, one end of the branch pipe is communicated with the explosion-proof cabinet, one end of the front air pipe close to the outer cover is fixedly connected to an upper one-way air valve, one end of the branch pipe close to the explosion-proof cabinet is fixedly connected to a lower one-way air valve, one end of the outer cover away from the branch pipe is fixedly connected to an exchange pipe, and one end of the exchange pipe is fixedly connected to a blower.

[0007] As a further improvement of the present application, the connection point between the rear air pipe and the gas tank is located on the upper side of the connection point between the front air pipe and the gas tank. Through the above arrangement, the argon gas in the gas tank can fill the gas tank from bottom to top and be discharged from top to bottom.

[0008] As a further improvement of the present application, a mounting plate is provided on the upper side of the front air duct and the rear air duct, a semiconductor refrigeration plate is fixedly connected to the middle part of the mounting plate, and the upper and lower sides of the semiconductor refrigeration plate are respectively set as the cooling surface and the heating surface.

[0009] As a further improvement of the present application, the top and bottom ends of the mounting plate are respectively fixedly connected with an upper shield and a lower shield, both of which cover the outside of the semiconductor refrigeration plate, and the outsides of the front air pipe and the rear air pipe are respectively fixedly connected with a cold sleeve and a hot sleeve.

[0010] As another improvement of the present application, the upper shield and the cold jacket are connected through an exchange tube, and the end of the upper shield away from the exchange tube and the end of the lower shield away from the exchange tube are fixedly connected to a blower, and the ends of the cold jacket and the hot jacket away from the exchange tube are fixedly connected to an exhaust pipe. Through the above arrangement, the purity of the argon gas inside the gas storage tank is improved, so that the argon gas recycled in the gas storage tank can play a better role.

[0011] As another improvement supplement of the present application, the outer wall of the front air pipe located on the inner side of the cold sleeve, the outer wall of the rear air pipe located on the inner side of the hot sleeve and the upper and lower surfaces of the semiconductor refrigeration plate are fixedly connected with heat conducting plates. Through the above arrangement, the semiconductor refrigeration plate, the front air pipe and the rear air pipe can better complete heat exchange.

[0012] As another improved supplement of the present application, a limit rod is fixedly connected between the upper and lower ends of the gas storage tank, a lifting plate is slidably connected between the two limit rods, a suspension ball is fixedly connected to the inner circle of the lifting plate, and the interior of the suspension ball is filled with a mixed gas, and the density of the mixed gas is between the density of air and the density of argon.

[0013] As another improvement of the present application, a distance sensor is fixedly connected to the inner wall of the top of the gas storage tank, and the distance sensor is electrically connected to the gas valve and the blower. Through the above arrangement, the switch of the blower and the gas valve can be controlled.

[0014] To sum up, the device can collect the leaked argon gas and reuse it, saving the consumption of argon gas. At the same time, when reusing the collected argon gas, the interior of the explosion-proof cabinet is restored to normal pressure, and the operating time of the gas supply equipment of the gas supply pipe is reduced, which can extend the service life of the gas source equipment and reduce the maintenance and replacement costs. Maintaining positive pressure for a long time will cause continuous mechanical stress on the seals and electronic components in the explosion-proof cabinet. Intermittent restoration of normal pressure helps to release these stresses and avoid potential damage to components and seals in a long-term high-pressure environment, thereby extending the service life of seals and electronic components and reducing maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall front view of the first embodiment of the present application;

[0016] Figure 2 This is a front cross-sectional view of the explosion-proof cabinet in the first embodiment of the present application;

[0017] Figure 3 This is a front cross-sectional view of the gas storage tank in the first embodiment of the present application;

[0018] Figure 4 This is a state diagram of the suspension ball rising when no argon gas is collected in the gas storage tank in the first and second embodiments of the present application;

[0019] Figure 5 This is a trajectory diagram of the argon gas inside the explosion-proof cabinet being discharged outward in the first and second embodiments of the present application;

[0020] Figure 6 This is a trajectory diagram of the argon gas inside the gas storage tank moving into the explosion-proof cabinet in the first and second embodiments of the present application.

[0021] Description of the numbers in the figure:

[0022] 1. Base plate; 2. Explosion-proof cabinet; 3. Air supply pipe; 301, air valve; 4. Outer cover; 5. Hollow cavity; 6. Front air pipe; 7. Rear air pipe; 8. Air storage tank; 9. Branch pipe; 10. Upper one-way air valve; 11. Lower one-way air valve; 12. Mounting plate; 13. Semiconductor refrigeration plate; 14. Upper protective cover; 15. Lower protective cover; 16. Cold sleeve; 17. Hot sleeve; 18. Exchange tube; 19. Blower; 20. Filter; 21. Limit rod; 22. Lifting plate; 23. Suspension ball; 24. Distance sensor. DETAILED DESCRIPTION

[0023] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0024] The first implementation method:

[0025] Figure 1-6A high-safety explosion-proof power distribution device is shown, comprising a base plate 1, an explosion-proof cabinet 2 is installed on the top of the base plate 1, one end of the explosion-proof cabinet 2 is fixedly connected to an air supply pipe 3, one end of the air supply pipe 3 is fixedly connected to an air valve 301, an outer cover 4 is provided on the outer side of the explosion-proof cabinet 2, the bottom end of the outer cover 4 is fixedly connected to the base plate 1, a hollow cavity 5 is set between the explosion-proof cabinet 2 and the outer cover 4, a front air pipe 6 and a rear air pipe 7 are set on one side of the outer cover 4, and a storage The gas tank 8, the other end of the front air pipe 6 is fixedly connected to the outer cover 4 and is communicated with the hollow cavity 5, the end of the front air pipe 6 close to the outer cover 4 is fixedly connected to the branch pipe 9, one end of the branch pipe 9 is communicated with the explosion-proof cabinet 2, the end of the front air pipe 6 close to the outer cover 4 is fixedly connected to the upper one-way air valve 10, the end of the branch pipe 9 close to the explosion-proof cabinet 2 is fixedly connected to the lower one-way air valve 11, the end of the outer cover 4 away from the branch pipe 9 is fixedly connected to the exchange pipe 18, and one end of the exchange pipe 18 is fixedly connected to the blower 19.

[0026] When in use, open the air valve 301 to fill argon into the interior of the explosion-proof cabinet 2 through the air supply pipe 3, and keep the interior of the air supply pipe 3 in a positive pressure state. During the use of the explosion-proof cabinet 2, the leaked argon fills the hollow cavity 5 and fills the gas storage tank 8 through the upper one-way air valve 10 and the front air pipe 6, and is finally discharged outward through the rear air pipe 7. When the gas storage tank 8 is full of argon, close the air valve 301 to stop the air supply pipe 3 from filling the explosion-proof cabinet 2, and start the blower 19 at the same time to make the hollow cavity 5 a negative pressure state. At this time, the interior of the explosion-proof cabinet 2 is at normal pressure, which is greater than the air pressure in the hollow cavity 5, and the argon stored in the gas storage tank 8 enters the interior of the explosion-proof cabinet 2 through the branch pipe 9 and the lower one-way air valve 11, and leaks into the hollow cavity 5 and is finally discharged through the exchange pipe 18. When the argon in the gas storage tank 8 is used up, turn off the blower 19 and open the air valve 301.

[0027] Through the above-mentioned arrangement, the argon gas leaked outward can be collected and reused, which saves the consumption of argon gas and reduces the cost of using argon gas. At the same time, when the collected argon gas is reused, the interior of the explosion-proof cabinet 2 is restored to a normal pressure state, and the operating time of the gas supply equipment supplied by the gas supply pipe 3 is reduced, which can extend the service life of the gas source equipment and reduce the maintenance and replacement costs.

[0028] Maintaining positive pressure for a long time will cause continuous mechanical stress on the seals and electronic components in the explosion-proof cabinet 2. Intermittently restoring normal pressure helps to release these stresses and avoid potential damage to components and seals caused by long-term high-pressure environment, thereby extending the service life of seals and electronic components and reducing maintenance frequency.

[0029] The connection point between the rear air pipe 7 and the gas tank 8 is located on the upper side of the connection point between the front air pipe 6 and the gas tank 8. Since the density of argon gas is greater than the density of air, through the above arrangement, the argon gas in the gas tank 8 can fill the gas tank 8 from bottom to top and be discharged from top to bottom.

[0030] The second implementation method:

[0031] Figure 4-6 A high-safety explosion-proof power distribution device is shown. Different from the first embodiment, a mounting plate 12 is further provided on the upper side of the front air duct 6 and the rear air duct 7, a semiconductor refrigeration plate 13 is fixedly connected to the middle part of the mounting plate 12, the upper and lower sides of the semiconductor refrigeration plate 13 are respectively arranged as a cooling surface and a heating surface, an upper shield 14 and a lower shield 15 are respectively fixedly connected to the top and bottom ends of the mounting plate 12, the upper shield 14 and the lower shield 15 are both covered on the outside of the semiconductor refrigeration plate 13, a cold sleeve 16 and a hot sleeve 17 are respectively fixedly connected to the outside of the front air duct 6 and the rear air duct 7, the upper shield 14 and the cold sleeve 16 are both connected through an exchange tube 18, a blower 19 is fixedly connected to one end of the upper shield 14 away from the exchange tube 18 and one end of the lower shield 15 away from the exchange tube 18, and an exhaust pipe is fixedly connected to one end of the cold sleeve 16 and the hot sleeve 17 away from the exchange tube 18.

[0032] Through the above-mentioned arrangement, the cold energy generated by the semiconductor refrigeration plate 13 can cool the argon gas entering the gas tank 8 through the front air pipe 6, thereby increasing the density of the argon gas inside the gas tank 8. At the same time, the heat energy generated by the semiconductor refrigeration plate 13 can heat the air entering the gas tank 8 through the rear air pipe 7, thereby reducing the density of the air entering the gas tank 8, increasing the density difference between the air and the argon gas in the gas tank 8, avoiding the mixing of the air and the argon gas inside the gas tank 8, and improving the purity of the argon gas inside the gas tank 8, so that the argon gas recycled in the gas tank 8 can play a better role. At the same time, when the cooled argon gas enters the interior of the explosion-proof cabinet 2, it can also cool the electronic components inside the explosion-proof cabinet 2.

[0033] The outer wall of the front air pipe 6 located on the inner side of the cold sleeve 16, the outer wall of the rear air pipe 7 located on the inner side of the hot sleeve 17, and the upper and lower sides of the semiconductor refrigeration plate 13 are fixedly connected with heat conducting plates. Through the above-mentioned arrangement, the semiconductor refrigeration plate 13, the front air pipe 6 and the rear air pipe 7 can better complete the heat exchange. A limit rod 21 is fixedly connected between the upper and lower ends of the gas storage tank 8, and a lifting plate 22 is slidably connected between the two limit rods 21. The inner circle of the lifting plate 22 is fixedly connected with a suspension ball 23. The interior of the suspension ball 23 is filled with a mixed gas, and the density of the mixed gas is between the density of air and the density of argon. A distance sensor 24 is fixedly connected to the inner wall at the top of the gas storage tank 8, and the distance sensor 24 is electrically connected to the gas valve 301 and the blower 19.

[0034] Through the above arrangement, the suspension ball 23 can be suspended between the air and argon inside the gas tank 8, and rise and fall with the content of argon inside the gas tank 8. During the rising and falling process of the suspension ball 23, the distance sensor 24 can measure the rising and falling height of the suspension ball 23, and indirectly obtain the content of argon inside the gas tank 8, thereby controlling the switch of the blower 19 and the gas valve 301.

[0035] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A high-safety explosion-proof power distribution device, comprising a base plate (1), an explosion-proof cabinet (2) being installed on the top of the base plate (1), an air supply pipe (3) being fixedly connected to one end of the explosion-proof cabinet (2), and an air valve (301) being fixedly connected to one end of the air supply pipe (3), wherein: The explosion-proof cabinet (2) is covered with an outer cover (4) on its outer side. The bottom end of the outer cover (4) is fixedly connected to the base plate (1). A hollow cavity (5) is provided between the explosion-proof cabinet (2) and the outer cover (4). A front air pipe (6) and a rear air pipe (7) are provided on one side of the outer cover (4). A gas storage tank (8) is fixedly connected between one end of the front air pipe (6) and one end of the rear air pipe (7). The other end of the front air pipe (6) is fixedly connected to the outer cover (4) and communicates with the hollow cavity (5). One end of the tube (6) close to the outer cover (4) is fixedly connected to a branch tube (9), one end of the branch tube (9) is connected to the explosion-proof cabinet (2), one end of the front air pipe (6) close to the outer cover (4) is fixedly connected to an upper one-way air valve (10), one end of the branch tube (9) close to the explosion-proof cabinet (2) is fixedly connected to a lower one-way air valve (11), one end of the outer cover (4) away from the branch tube (9) is fixedly connected to an exchange tube (18), and one end of the exchange tube (18) is fixedly connected to a blower (19); A mounting plate (12) is provided on the upper side of the front air pipe (6) and the rear air pipe (7), a semiconductor cooling plate (13) is fixedly connected to the middle of the mounting plate (12), the upper side and the lower side of the semiconductor cooling plate (13) are respectively provided as a cooling surface and a heating surface, an upper shield (14) and a lower shield (15) are respectively fixedly connected to the top and the bottom of the mounting plate (12), the upper shield (14) and the lower shield (15) are both covered on the outside of the semiconductor cooling plate (13), and a cold sleeve (16) and a hot sleeve are respectively fixedly connected to the outside of the front air pipe (6) and the rear air pipe (7). (17), the upper shield (14) and the cold jacket (16) are connected via an exchange tube (18), one end of the upper shield (14) away from the exchange tube (18) and one end of the lower shield (15) away from the exchange tube (18) are fixedly connected to a blower (19), one end of the cold jacket (16) and the hot jacket (17) away from the exchange tube (18) are fixedly connected to an exhaust pipe, and the outer wall of the front air pipe (6) located on the inner side of the cold jacket (16), the outer wall of the rear air pipe (7) located on the inner side of the hot jacket (17) and the upper and lower sides of the semiconductor cooling sheet (13) are fixedly connected to heat conducting sheets.

2. A high-safety explosion-proof power distribution device according to claim 1, characterized in that: A limit rod (21) is fixedly connected between the upper and lower ends of the gas storage tank (8), a lifting plate (22) is slidably connected between the two limit rods (21), and a suspension ball (23) is fixedly connected to the inner ring of the lifting plate (22).

3. A high-safety explosion-proof power distribution device according to claim 2, characterized in that: The interior of the suspension ball (23) is filled with a mixed gas, and the density of the mixed gas is between the density of air and the density of argon.

4. A high-safety explosion-proof power distribution device according to claim 3, characterized in that: A distance sensor (24) is fixedly connected to the inner wall of the top end of the gas storage tank (8), and the distance sensor (24) is electrically connected to the gas valve (301) and the blower (19).

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