A sealed electrical control cabinet with dual self-checking function

Abstract

The present invention relates to a sealed electrical control cabinet with a dual self-checking function applied in the field of electrical control cabinets. A dual-effect self-checking device is arranged in the cabinet body. On the one hand, when the sealing of the cabinet body is defective and causes leakage of protective gas, the reduction of the air pressure inside the cabinet body will trigger the change and adjustment of the dual-effect self-checking device, causing the clean water in the left transparent cylinder to change color, thereby issuing a visual reminder to the staff. On the other hand, when the temperature inside the cabinet body is too high, the dual-effect self-checking device will also be triggered to produce another change and adjustment, causing the clean water in the right transparent cylinder to change color, thereby issuing a visual reminder to the staff, thereby reducing the damage to the electrical control cabinet due to being in a high temperature state for a long time. In addition, through the arrangement of an air replenishing component, when gas leaks, the air replenishing component is automatically triggered to achieve the effect of replenishing air into the cabinet body, thereby gaining reaction processing time for the staff. At the same time, when the temperature is high, the refrigerator is automatically started to cool the cabinet body.

Description

Technical Field

[0001] The invention relates to the field of electric control cabinets, and more particularly to a sealed electric control cabinet with a dual self-checking function. Background Art

[0002] An electrical control cabinet is a device that assembles switchgear, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen according to electrical wiring requirements. Its layout should meet the requirements for normal operation of the power system, facilitate maintenance, and not endanger the safety of people and surrounding equipment.

[0003] Since the use environment of electrical control cabinets is very diverse, one of them is that they need to be used in indoor environments with high concentrations of corrosive gases. At this time, the outer shell of the electrical control cabinet can be made of anti-corrosion materials (or painted for protection, etc.), but the electrical components inside it should not be exposed to corrosive gases for a long time. At present, technicians often choose to prevent electrical components from being corroded by corrosive gases by improving the sealing of the electrical control cabinet.

[0004] In the prior art, there is also a method of further preventing electrical components from being corroded by applying a positive pressure protection to the electrical control cabinet. The so-called positive pressure protection is to fill the electrical control cabinet with gas and make the internal air pressure of the electrical control cabinet higher than the external environmental pressure of the electrical control cabinet. In this way, the corrosive gas in the environment cannot enter the interior of the electrical control cabinet, thereby effectively protecting the electrical components inside the electrical control cabinet. For example, the specification of Chinese patent CN201910861650.8 discloses an electrical control cabinet that can provide a positive pressure protection function, which can prevent corrosive gases in the external environment from entering the interior of the electrical control cabinet. The positive pressure protection function can effectively cover various areas inside the electrical control cabinet; the positive pressure protection function has the function of automatic opening and stopping, and the structure is reasonable, which can prevent the positive pressure mechanism from overworking and has good working effect.

[0005] However, since the electrical control cabinet cannot be absolutely sealed, once the sealing of the electrical control cabinet is defective, the protective gas will gradually leak, causing the air pressure in the electrical control cabinet to gradually decrease. When the air pressure inside the electrical control cabinet is insufficient, corrosive gases will still enter the interior of the electrical control cabinet. If the staff fails to discover and handle it in time, the electrical components will be corroded by the corrosive gas. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that it is difficult to timely detect the leakage of protective gas in the existing electrical control cabinet, and there is a lack of effective remedial measures.

[0007] In order to solve the above problems, the present invention provides a sealed electrical control cabinet with a dual self-checking function, including a cabinet in a sealed state, the cabinet is filled with a protective gas, the protective gas is nitrogen, the air pressure inside the cabinet is greater than the air pressure of the external environment, and the characteristics are: a dual-effect self-checker is arranged on the cabinet, the dual-effect self-checker includes a sensing box and a dual warning cylinder located on the upper side of the cabinet, the sensing box is fixedly connected to the upper end of the cabinet and extends to the inside thereof, an elastic film is fixedly connected to the inner bottom surface of the sensing box, a through hole communicating with the inner side of the elastic film is opened at the bottom end of the sensing box, the elastic film is in an upward convex state under the action of air pressure, and the top of the elastic film is fixedly connected to a main magnet;

[0008] The double warning cylinder is fixedly connected to the upper end of the induction box. A secondary magnet is movably arranged in the double warning cylinder. The ends of the secondary magnet and the main magnet that are close to each other have the same pole. Both ends of the secondary magnet are fixedly connected to elastic pull ropes. The ends of the elastic pull ropes are fixedly connected to the inner wall of the double warning cylinder. The elastic pull ropes are in a stretched state.

[0009] The upper and lower sides of the auxiliary magnet are respectively abutted against an upper capsule and a lower capsule fixedly connected to the inner wall of the double warning tube. The lower capsule is filled with a red solution, and the upper capsule is filled with a yellow solution. The left and right sides of the double warning tube are respectively provided with a left transparent tube and a right transparent tube fixedly installed on the upper end of the induction box. Both the left and right transparent tubes are filled with clean water. The left and right ends of the double warning tube are respectively fixedly connected with a lower liquid guide tube and an upper liquid guide tube. The end of the lower liquid guide tube passes through the lower capsule and communicates with its interior, and the end of the upper liquid guide tube passes through the upper capsule and communicates with its interior.

[0010] As a further supplement to the present application, one end of the lower liquid guiding tube located in the left transparent tube is fixedly connected to a one-way valve 1, and one end of the upper liquid guiding tube located in the right transparent tube is fixedly connected to a one-way valve 2.

[0011] As another improvement of the present application, an air supply assembly is provided on the cabinet, and the air supply assembly includes a linkage rod and a support frame. The linkage rod is fixedly connected to the main magnet, and the support frame is fixedly connected to the inner wall of the induction box. The support frame is configured in a U shape, and an air supply switch is fixedly connected to the inner wall of the bottom end of the support frame.

[0012] As another improvement supplement of the present application, the air replenishing assembly also includes an air storage box fixedly mounted on the top outer wall of the cabinet, a piston plate slidingly and sealingly connected thereto is provided in the air storage box, and an electric cylinder is fixedly connected to the top inner wall of the air storage box.

[0013] As another improved supplement of the present application, the output end of the electric cylinder is fixedly connected to the piston plate, the electric cylinder is connected to the air replenishment switch signal, and the bottom of the piston plate is filled with a backup gas, which is nitrogen.

[0014] As another improvement supplement of the present application, an air duct is connected to the bottom end of the air storage box, the bottom end of the air duct passes through the outer wall of the cabinet and extends to the inside of the cabinet, and a one-way valve three is fixedly connected to the bottom end of the air duct.

[0015] As another improvement of the present application, a heat dissipation switch is fixedly connected to the top inner wall of the support frame, a refrigerator is fixedly connected to the top outer wall of the cabinet, and the refrigerator is signal-connected to the heat dissipation switch.

[0016] As another improved supplement of the present application, a heat conducting rod is fixedly connected to the cooling end of the refrigerator, the heat conducting rod penetrates the outer wall of the cabinet and extends to the interior of the cabinet, and the heat conducting rod is made of heat conducting material.

[0017] To summarize, the present application sets a double-effect self-test device in the cabinet. On the one hand, when the sealing of the cabinet is defective and causes the leakage of the protective gas, the reduction of the air pressure inside the cabinet will trigger the change and adjustment of the double-effect self-test device, causing the clean water in the left transparent cylinder to change color, thereby issuing a visual reminder to the staff. On the other hand, when the temperature inside the cabinet is too high, it will also trigger another change and adjustment of the double-effect self-test device, causing the clean water in the right transparent cylinder to change color, thereby issuing a visual reminder to the staff, thereby reducing the damage to the electrical control cabinet due to being in a high temperature state for a long time. In addition, through the setting of the air replenishing component, when gas leaks, the air replenishing component is automatically triggered to achieve the effect of replenishing air into the cabinet, thereby gaining reaction time for the staff. At the same time, when the temperature is high, the refrigerator is automatically started to cool down the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the detection state of the present invention

[0019] Figure 2 A perspective view of the present invention;

[0020] Figure 3 It is a three-dimensional diagram of the double-effect self-test device of the present invention;

[0021] Figure 4 It is a front view structural schematic diagram of the present invention;

[0022] Figure 5 It is a cross-sectional structural schematic diagram of the present invention;

[0023] Figure 6 It is a cross-sectional structural schematic diagram of the induction box of the present invention;

[0024] Figure 7 It is a schematic cross-sectional view of the double warning tube of the present invention;

[0025] Figure 8 It is a cross-sectional structural schematic diagram of the left transparent cylinder of the present invention;

[0026] Fig. 9 It is a schematic cross-sectional view of the right transparent cylinder of the present invention;

[0027] Fig.10 It is a schematic cross-sectional structure diagram of the air storage box of the present invention;

[0028] Fig.11 This is a schematic diagram of the pictographic changes in the induction box when the protective gas leaks in the present invention;

[0029] Fig.12 This is a schematic diagram of the pictographic changes in the double warning tube when the protective gas leaks in the present invention;

[0030] Fig.13 This is a schematic diagram of the pictographic changes when the temperature in the cabinet of the present invention is too high;

[0031] Fig.14 It is a schematic diagram of the pictographic changes in the double warning tubes when the temperature in the cabinet of the present invention is too high.

[0032] Description of the numbers in the figure:

[0033] 1. Cabinet; 201. Induction box; 202. Elastic membrane; 203. Through hole; 204. Main magnet; 205. Double warning tube; 206. Auxiliary magnet; 207. Elastic pull rope; 208. Lower capsule; 209. Red solution; 210. Lower liquid guide tube; 211. Left transparent tube; 212. One-way valve one; 3. Air supply assembly; 31. Linkage rod; 32. Support frame; 33. Air supply switch; 34. Air storage box; 35. Piston plate; 36. Electric cylinder; 37. Spare gas; 38. Air guide tube; 39. One-way valve three; 401. Upper capsule; 402. Yellow solution; 403. Upper liquid guide tube; 404. Right transparent tube; 405. One-way valve two; 501. Heat dissipation switch; 502. Refrigerator; 503. Heat conduction rod. DETAILED DESCRIPTION

[0034] The following is a detailed description of three implementation methods of the present application in conjunction with the accompanying drawings.

[0035] The first implementation method:

[0036] The present invention provides a sealed electrical control cabinet with dual self-checking function. Figure 1 and Figure 2 , including a sealed cabinet 1, the cabinet 1 is filled with protective gas, the protective gas is nitrogen, the air pressure inside the cabinet 1 is greater than the external environmental pressure, and the cabinet 1 is provided with a double-effect self-test device, combined with Figure 3-6The double-effect self-test device includes an induction box 201 and a double warning tube 205 located on the upper side of the cabinet 1. The induction box 201 is fixedly connected to the upper end of the cabinet 1 and extends to the inside thereof. An elastic membrane 202 is fixedly connected to the inner bottom surface of the induction box 201. A through hole 203 communicating with the inner side of the elastic membrane 202 is provided at the bottom end of the induction box 201. The elastic membrane 202 is in an upward convex state under the action of air pressure. A main magnet 204 is fixedly connected to the top of the elastic membrane 202.

[0037] Combination Figure 4 and Figure 7 As shown, the double warning tube 205 is fixedly connected to the upper end of the induction box 201, and a secondary magnet 206 is movably arranged in the double warning tube 205. The ends of the secondary magnet 206 and the main magnet 204 that are close to each other are of the same pole. Both ends of the secondary magnet 206 are fixedly connected to an elastic pull rope 207, and the end of the elastic pull rope 207 is fixedly connected to the inner wall of the double warning tube 205, and the elastic pull rope 207 is in a stretched state.

[0038] The upper and lower sides of the auxiliary magnet 206 are respectively abutted against an upper capsule 401 and a lower capsule 208 fixedly connected to the inner wall of the double warning tube 205, the lower capsule 208 is filled with a red solution 209, and the upper capsule 401 is filled with a yellow solution 402. The left and right sides of the double warning tube 205 are respectively provided with a left transparent tube 211 and a right transparent tube 404 fixedly installed on the upper end of the induction box 201, and the left and right transparent tubes 211 and 404 are filled with clean water. The left and right ends of the double warning tube 205 are respectively fixedly connected with a lower liquid guide tube 210 and an upper liquid guide tube 403, the end of the lower liquid guide tube 210 passes through the lower capsule 208 and communicates with the interior thereof, and the end of the upper liquid guide tube 403 passes through the upper capsule 401 and communicates with the interior thereof;

[0039] See also Figure 8 and Fig. 9 One end of the lower liquid guiding tube 210 located in the left transparent tube 211 is fixedly connected to a one-way valve 212, and one end of the upper liquid guiding tube 403 located in the right transparent tube 404 is fixedly connected to a one-way valve 405. Both the one-way valve 212 and the one-way valve 405 are elastic one-way valves. In the initial state, the lower bladder 208 and the upper bladder 401 are not squeezed, so that the liquid inside the two is not easy to enter the left transparent tube 211 and the right transparent tube 404.

[0040] Through the setting of the dual-effect self-test device, on the one hand, the leakage of protective gas in the cabinet 1 is detected, and on the other hand, the overheating in the cabinet 1 is detected, as follows:

[0041] 1. Shielding gas leak detection: Please refer to Figure 11-12Under normal circumstances, due to the relatively high pressure inside the cabinet 1, the elastic membrane 202 will be in an upward convex state, and because the auxiliary magnet 206 will be subjected to a magnetic repulsion from the main magnet 204, the elastic pull rope 207 can be kept in a stretched state. When the sealing of the cabinet 1 is defective, resulting in leakage of the protective gas, such as Fig.10 As shown in FIG. 1 , as the air pressure inside the cabinet 1 decreases, the elastic membrane 202 will gradually rebound, and the rebound of the elastic membrane 202 will drive the main magnet 204 to move downward, causing the distance between the main magnet 204 and the auxiliary magnet 206 to increase, thereby reducing the magnetic repulsion force on the auxiliary magnet 206, and further allowing the elastic pull rope 207 to rebound to a certain extent, as shown in FIG. Fig.11 As shown, the rebound of the elastic pull rope 207 will drive the auxiliary magnet 206 to squeeze the lower capsule 208, so that part of the red solution 209 can be squeezed into the left transparent tube 211 through the lower liquid guide tube 210 and the one-way valve 212, so that the clean water in the left transparent tube 211 turns red, and then a reminder can be issued to the staff, so that the staff can observe the color change of the clean water in the left transparent tube 211 and know the leakage of the protective gas, thereby prompting the staff to take corresponding measures in time, thereby preventing the electrical components in the cabinet 1 from being corroded.

[0042] 2. Overheat detection: Please refer to Figure 13-14 The electrical control cabinet will generate a certain amount of heat during use. The sealing treatment will reduce the heat dissipation efficiency of the electrical control cabinet, making it easy for the electrical control cabinet to have an over-temperature phenomenon. If the corresponding treatment cannot be carried out in time, the electrical control cabinet will be damaged due to being in a high temperature state for a long time. Through the setting of the double-effect self-test device, when the temperature in the cabinet 1 is too high, the air pressure inside the cabinet 1 will be further increased, so that the elastic film 202 will further bulge upward, thereby driving the main magnet 204 to move upward. Under the action of magnetic repulsion, the auxiliary magnet 206 It will also move upward, causing the secondary magnet 206 to squeeze the upper capsule 401, so that part of the yellow solution 402 can be squeezed into the right transparent tube 404 through the upper liquid guide tube 403 and the second one-way valve 405, causing the clean water in the right transparent tube 404 to turn yellow, and then a reminder can be sent to the staff, so that the staff can observe the color change of the clean water in the right transparent tube 404 and know that the electrical control cabinet is in a state of too high temperature, thereby prompting the staff to take corresponding measures in time, thereby preventing the electrical control cabinet from being damaged due to being in a high temperature state for a long time.

[0043] Second implementation method:

[0044] This embodiment adds the following structure based on the embodiment 1: Figure 4-6The cabinet 1 is provided with an air supply assembly 3, which includes a linkage rod 31 and a support frame 32. The linkage rod 31 is fixedly connected to the main magnet 204, and the support frame 32 is fixedly connected to the inner wall of the induction box 201, and the support frame 32 is set in a U shape. The inner wall of the bottom end of the support frame 32 is fixedly connected with an air supply switch 33. The air supply assembly 3 also includes an air storage box 34 fixedly installed on the outer wall of the top end of the cabinet 1, and the air storage box 34 is provided with a piston plate 35 connected thereto in a sliding seal, combined with Fig.10 As shown, an electric cylinder 36 is fixedly connected to the inner wall of the top end of the air storage box 34, the output end of the electric cylinder 36 is fixedly connected to the piston plate 35, the electric cylinder 36 is signal-connected to the air replenishment switch 33, and the bottom of the piston plate 35 is filled with spare gas 37, the spare gas 37 is nitrogen, and the bottom end of the air storage box 34 is connected to an air guide pipe 38, the bottom end of the air guide pipe 38 passes through the outer wall of the cabinet 1 and extends to the interior of the cabinet 1, and the bottom end of the air guide pipe 38 is fixedly connected to a one-way valve 39.

[0045] Through the joint arrangement of the double-effect self-test device and the gas replenishing component 3, when the protective gas leaks and causes the main magnet 204 to move downward, the linkage rod 31 will also move downward, so that the linkage rod 31 will squeeze and trigger the gas replenishing switch 33. After the gas replenishing switch 33 is triggered, the electric cylinder 36 will be started, so that the electric cylinder 36 drives the piston plate 35 to move downward, so that the spare gas 37 can be squeezed into the cabinet 1 through the air guide pipe 38 and the one-way valve 39, so as to achieve the purpose of replenishing gas into the cabinet 1, which can not only alleviate the reduction of the internal air pressure of the cabinet 1, but also gain more reaction and processing time for the staff.

[0046] The third implementation method:

[0047] This embodiment adds the following structure based on the embodiment 2: Figure 4-5 A heat dissipation switch 501 is fixedly connected to the inner wall of the top of the support frame 32, and a refrigerator 502 is fixedly connected to the outer wall of the top of the cabinet 1. The refrigerator 502 is signal-connected to the heat dissipation switch 501. A heat conducting rod 503 is fixedly connected to the cooling end of the refrigerator 502. The heat conducting rod 503 penetrates the outer wall of the cabinet 1 and extends to the interior of the cabinet 1. The heat conducting rod 503 is made of heat conducting material;

[0048] Through the joint arrangement of the double-effect self-test device, the air replenishing component 3, the heat dissipation switch 501, the refrigerator 502, and the thermally conductive rod 503, when the temperature inside the cabinet 1 is too high and the main magnet 204 moves upward, the linkage rod 31 will also move upward. The posture linkage rod 31 squeezes and triggers the heat dissipation switch 501, so that the refrigerator 502 starts and starts cooling. The cooling effect of the refrigerator 502 can act on the inside of the cabinet 1 through the thermally conductive rod 503, thereby reducing the temperature inside the cabinet 1 to a certain extent, reducing the possibility of damage to the electrical control cabinet due to being in a high temperature state for a long time.

[0049] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealed electrical control cabinet with a dual self-checking function, comprising a cabinet body (1) in a sealed state, wherein the cabinet body (1) is filled with a protective gas, wherein the protective gas is nitrogen, and the air pressure inside the cabinet body (1) is greater than the external environmental air pressure, wherein: The cabinet (1) is provided with a double-effect self-test device, the double-effect self-test device comprising a sensing box (201) and a double warning tube (205) located on the upper side of the cabinet (1); the sensing box (201) is fixedly connected to the upper end of the cabinet (1) and extends into the interior thereof; an elastic membrane (202) is fixedly connected to the inner bottom surface of the sensing box (201); a through hole (203) communicating with the inner side of the elastic membrane (202) is provided at the bottom end of the sensing box (201); the elastic membrane (202) is in an upwardly convex state under the action of air pressure; and a main magnet (204) is fixedly connected to the top end of the elastic membrane (202); The double warning tube (205) is fixedly connected to the upper end of the induction box (201), and a secondary magnet (206) is movably arranged in the double warning tube (205). The ends of the secondary magnet (206) and the main magnet (204) that are close to each other have the same pole. Both ends of the secondary magnet (206) are fixedly connected to elastic pull ropes (207), and the ends of the elastic pull ropes (207) are fixedly connected to the inner wall of the double warning tube (205). The elastic pull ropes (207) are in a stretched state. The upper and lower sides of the secondary magnet (206) are respectively in contact with an upper capsule (401) and a lower capsule (208) fixedly connected to the inner wall of the double warning tube (205); the lower capsule (208) is filled with a red solution (209); the upper capsule (401) is filled with a yellow solution (402); the left and right sides of the double warning tube (205) are respectively provided with a left transparent tube (211) and a right transparent tube (404) fixedly mounted on the upper end of the induction box (201); the left and right transparent tubes (211) and the right transparent tubes (404) are both filled with clear water; the left and right ends of the double warning tube (205) are respectively fixedly connected with a lower liquid guide tube (210) and an upper liquid guide tube (403); the end of the lower liquid guide tube (210) passes through the lower capsule (208) and communicates with the interior thereof; the end of the upper liquid guide tube (403) passes through the upper capsule (401) and communicates with the interior thereof.

2. A sealed electrical control cabinet with dual self-checking function according to claim 1, characterized in that: One end of the lower liquid guide tube (210) located in the left transparent tube (211) is fixedly connected to a one-way valve (212), and one end of the upper liquid guide tube (403) located in the right transparent tube (404) is fixedly connected to a one-way valve (405).

3. A sealed electrical control cabinet with dual self-checking function according to claim 1, characterized in that: The cabinet (1) is provided with an air supply component (3), the air supply component (3) comprising a linkage rod (31) and a support frame (32), the linkage rod (31) being fixedly connected to the main magnet (204), the support frame (32) being fixedly connected to the inner wall of the induction box (201), and the support frame (32) being arranged in a U shape, and an air supply switch (33) being fixedly connected to the inner wall of the bottom end of the support frame (32).

4. A sealed electrical control cabinet with dual self-checking function according to claim 3, characterized in that: The air supply assembly (3) further comprises an air storage box (34) fixedly mounted on the top outer wall of the cabinet (1), a piston plate (35) being provided in the air storage box (34) and being slidably and sealingly connected thereto, and an electric cylinder (36) being fixedly connected to the top inner wall of the air storage box (34).

5. A sealed electrical control cabinet with dual self-checking function according to claim 4, characterized in that: The output end of the electric cylinder (36) is fixedly connected to the piston plate (35), the electric cylinder (36) is signal-connected to the gas supply switch (33), and the bottom of the piston plate (35) is filled with a backup gas (37), which is nitrogen.

6. A sealed electrical control cabinet with dual self-checking function according to claim 5, characterized in that: The bottom end of the air storage box (34) is connected to an air guide pipe (38), the bottom end of the air guide pipe (38) penetrates the outer wall of the cabinet (1) and extends to the interior of the cabinet (1), and the bottom end of the air guide pipe (38) is fixedly connected to a one-way valve three (39).

7. The sealed electrical control cabinet with dual self-checking function according to claim 3 is characterized in that: A heat dissipation switch (501) is fixedly connected to the inner wall at the top of the support frame (32), and a refrigerator (502) is fixedly connected to the outer wall at the top of the cabinet (1), and the refrigerator (502) is signal-connected to the heat dissipation switch (501).

8. The sealed electrical control cabinet with dual self-checking function according to claim 7, characterized in that: A heat conducting rod (503) is fixedly connected to the cooling end of the refrigerator (502); the heat conducting rod (503) penetrates the outer wall of the cabinet (1) and extends into the interior of the cabinet (1); the heat conducting rod (503) is made of a heat conducting material.

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