Temperature control and alarm device for electric power equipment

Abstract

The application belongs to the technical field of temperature control equipment, and discloses a temperature control and alarm device for power equipment, which comprises a body, two connecting heads and a temperature alarm, the inner side of the connecting head is fixedly connected with a heat-conducting metal sheet at one end, the left and right sides of the inner wall of the body are both provided with a moving groove and a through opening, the inner wall of the heat-conducting metal sheet is fixedly connected with a connecting plate through a connecting column, the bottom of the connecting plate extends to the inside of the moving groove and is fixedly connected with a No.2 spring and a pressing column. The application pressurizes the helium through the No.3 spring and the sealing column, so that the two sealing blocks in mutual sealing contact are pushed away by the air pressure of the helium, thereby making the helium enter the inside of the body, and the surface of the heat-conducting metal sheet is contacted with the helium, so that the corrosion of the heat-conducting metal sheet in the high-temperature environment can be avoided, and a little helium will be left in the inside of the body each time, thereby avoiding the further oxidation and corrosion of the heat-conducting metal sheet by the air.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of temperature control equipment, and particularly relates to a temperature control and alarm device for electric power equipment. BACKGROUND

[0002] The electric power equipment includes two categories of power generation and power supply, wherein the power supply type electric power equipment is in the form of a sealed box body, and a switch and a controller are arranged in the box body, and since line aging and overloading are prone to cause the electric circuit to heat up during power supply, in order to enhance safety, a temperature control and alarm device is generally arranged, a specified temperature threshold is set, and the overheat cut-off circuit connection operation is completed, so that the temperature control and alarm purposes are achieved.

[0003] At present, the existing temperature control and alarm device for electric power equipment mainly achieves the purpose of temperature control by cutting off the circuit through a metal sheet that is heated and deformed by being connected to the circuit of the electric power equipment, but the existing metal sheet for heat conduction will be deformed to cut off the circuit when the temperature reaches the threshold, but the high temperature will cause the oxidation and corrosion of the metal sheet to be intensified, especially the two metal sheets that are electrically connected will ionize in the air, and the ions will intensify the oxidation of the metal sheet.

[0004] Meanwhile, the metal sheet that is deformed by heat will return to the state before deformation when the temperature gradually decreases, and the metal sheet in the prior art will be in contact again to form a loop after resetting, but the existing heat-conducting metal sheet is prone to deformation fatigue under long-term oxidation and corrosion, and cannot be reset or is reset too early, which is extremely dangerous under the condition of power supply of the electric power equipment, and the reliability needs to be improved, and the internal temperature of the existing temperature control and alarm device will also increase with the increase of the temperature of the connected circuit, so that the temperature in the device is increased, which may affect the precision of the heat-conducting metal sheet. SUMMARY

[0005] The application aims to provide a temperature control and alarm device for electric power equipment to solve the problems in the background art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a temperature control and alarm device for electrical equipment, comprising a main body, two connecting heads and a temperature alarm, wherein one end of the inner side of the connecting head is fixedly connected to a heat-conducting metal sheet, and a movable groove and a through hole are provided on the left and right sides of the inner wall of the main body, the inner wall of the heat-conducting metal sheet is fixedly connected to a connecting plate through a connecting column, the bottom of the connecting plate extends to the interior of the movable groove and is fixedly connected to a No. 2 spring and a pressure column, the other end of the No. 2 spring is fixedly connected to a sealing block, a balancing hole is provided on the inner wall of the main body, the left and right sides of the main body are fixedly connected to an air storage cylinder, the inner wall of the air storage cylinder is sealed and clamped with a sealing column, the outer surface of the sealing column is movably sleeved with a No. 3 spring and the two ends of the No. 3 spring are respectively fixedly connected to the air storage cylinder and the sealing column, the interior of the air storage cylinder is filled with helium, the outer surface of the heat-conducting metal sheet is fixedly connected to a sealing strip, and the interior of the movable groove is provided with a No. 1 spring fixedly connected to the connecting plate.

[0007] Preferably, the upper and lower connecting heads are fixedly sleeved on the top and bottom of the main body in sequence, the two heat-conducting metal sheets are fixedly connected to the opposite ends of the two connecting heads in sequence, the probe line of the temperature alarm passes through the balance hole and is fixedly connected to the inner wall of the heat-conducting metal sheet, the opposite surfaces of the two heat-conducting metal sheets are in limited contact and the left and right ends are respectively in sealing contact with the left and right sides of the inner wall of the main body.

[0008] Preferably, the sealing strip is made of a rubber block and both left and right ends are in sealing contact with the inner wall of the body, and the sealing strip is fixedly connected to the front and rear sides of the heat-conducting metal sheet by gluing.

[0009] Preferably, a through groove symmetrically distributed up and down is opened on one side of the inner wall of the movable groove close to the center of the main body, the connecting plate extends through the through groove and is clamped on the inner wall of the movable groove, the No. 1 spring is located inside the through groove and its two ends are fixedly connected to the connecting plate and the through groove respectively.

[0010] Preferably, the number of the sealing blocks is four and they are evenly divided into two groups. The two groups of sealing blocks are respectively sealed and clamped in the middle of the left and right movable grooves. Each group of sealing blocks is in the form of upper and lower sealing contact and is sealed in the through opening.

[0011] Preferably, a card slot is provided on the inner wall of the gas storage cylinder, a card block is fixedly connected to the outer surface of the sealing column, the card block is sealingly engaged in the card slot, and the helium is sealingly filled between the sealing column and the sealing block.

[0012] Preferably, the No. 2 spring is movably sleeved on the outer surface of the pressure column and its two ends are fixedly connected to the sealing block and the connecting plate respectively. One end of the pressure column facing the sealing block is in limited contact with the sealing block, and the No. 2 spring is in a compressed state when the upper and lower sealing blocks are in contact.

[0013] Preferably, the number of balance holes is four and is respectively arranged on the left and right sides of the inner wall of the body, and the inside of the heat-conducting metal sheet is communicated with the outside through the balance holes.

[0014] Preferably, the height of the contact surface of the left and right ends of the upper and lower heat-conducting metal sheets is greater than the diameter of the through hole.

[0015] The beneficial effects of the present application are as follows:

[0016] 1. The two heat-conducting metal sheets deformed by heat drive the connecting column and the connecting plate to move in the direction of compressing the first spring, respectively drive the upper and lower groups of compression columns to move upward and release the limiting pressure on the sealing blocks, and the connecting plate drives the compression columns to gradually move away from the sealing blocks, and the degree of compression of the second spring gradually decreases, the helium gas is pressurized by the third spring and the sealing column, the two sealing blocks in contact with each other are pushed away by the gas pressure of the helium gas, so that the helium gas enters the inside of the body, and the surface of the heat-conducting metal sheet is contacted with the helium gas, thereby avoiding the heat-conducting metal sheet from being corroded in a high-temperature environment, and a little helium gas enters the inside of the body each time, and then the further oxidation and corrosion of the heat-conducting metal sheet by air can be avoided.

[0017] 2. The helium gas entering the inside of the body can quickly absorb the heat of the heat-conducting metal sheet, the heat-conducting metal sheet gradually returns to normal temperature by being pressurized by the compressed first spring, on the one hand, the effective space in the body is compressed to push the helium gas back to the inside of the gas storage cylinder, and at the same time, the compression columns are driven by the connecting column and the connecting plate to move to the position in contact with the sealing blocks, thereby resealing the through hole, after the cooling function is completed, the helium gas is pushed back to the inside of the gas storage cylinder, and then the two heat-conducting metal sheets re-contact and form a loop after power-off, thereby having the advantage of high reliability.

[0018] 3. The sealing blocks in contact with each other are moved by the connecting column and the connecting plate to drive the compression columns to move and release the limiting pressure on the sealing blocks after the heat-conducting metal sheet is heated, the helium gas is pressurized by the sealing column and the third spring to push the sealing blocks to the inside of the moving groove, thereby entering the inside of the body after the through hole is opened, thereby the air environment in the body can be automatically cooled by the helium gas, and the influence of the heat-conducting metal sheet in a high-temperature environment can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the overall structure of the present application;

[0020] Figure 2 It is a front view of the overall structure of the present application;

[0021] Figure 3 It is a front view of the overall structure of the present application; Figure 2A magnified schematic diagram of the structure at A in the middle;

[0022] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 5 It is a side cutaway schematic diagram of the overall structure of the present invention;

[0024] Figure 6 It is a schematic diagram showing the internal three-dimensional cutaway view of the overall structure of the present invention;

[0025] Figure 7 Schematic diagram of the structural coordination relationship of the heat-conducting metal sheet, No. 1 spring, connecting column, No. 2 spring, sealing block, pressure column and sealing strip of the present invention;

[0026] Figure 8 This is an exploded schematic diagram of the connecting plate, No. 1 spring, connecting column, No. 2 spring, sealing block and pressure column of the present invention;

[0027] Figure 9 This is an exploded schematic diagram of the air reservoir, sealing column, clamping block and No. 3 spring of the present invention;

[0028] Figure 10 It is a three-dimensional cutaway schematic diagram of the main body of the present invention.

[0029] In the figure: 1. Main body; 2. Connector; 3. Temperature alarm; 4. Gas cylinder; 41. Card slot; 5. Sealing column; 51. Card block; 6. Helium; 7. Heat-conducting metal sheet; 8. Moving groove; 9. Connecting plate; 10. Spring No. 1; 11. Connecting column; 12. Balancing hole; 13. Spring No. 2; 14. Sealing block; 15. Pressure column; 16. Through port; 17. Sealing strip; 18. Spring No. 3; 19. Through slot. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1 to 10As shown, an embodiment of the present invention provides a temperature control and alarm device for electric equipment, including a main body 1, two connecting heads 2 and a temperature alarm 3, an inner end of the connecting head 2 is fixedly connected to a heat-conducting metal sheet 7, and a movable groove 8 and a through-hole 16 are provided on the left and right sides of the inner wall of the main body 1, the inner wall of the heat-conducting metal sheet 7 is fixedly connected to a connecting plate 9 through a connecting column 11, the bottom of the connecting plate 9 extends to the interior of the movable groove 8 and is fixedly connected to a No. 2 spring 13 and a pressure column 15, the other end of the No. 2 spring 13 is fixedly connected to a sealing block 14, a balancing hole 12 is provided on the inner wall of the main body 1, and an air cylinder 4 is fixedly connected to the left and right sides of the main body 1, the inner wall of the air cylinder 4 is sealed and clamped with a sealing column 5, the outer surface of the sealing column 5 is movably sleeved with a No. 3 spring 18 and the two ends of the No. 3 spring 18 are respectively fixedly connected to the air cylinder 4 and the sealing column 5, the interior of the air cylinder 4 is filled with helium 6, the outer surface of the heat-conducting metal sheet 7 is fixedly connected to a sealing strip 17, and the interior of the movable groove 8 is provided with a No. 1 spring 10 fixedly connected to the connecting plate 9.

[0032] The working principle and beneficial effects of the above technical solution are:

[0033] The upper and lower connectors 2 are connected to the circuit of the power equipment, and a loop is formed with the cooperation of the two heat-conducting metal sheets 7. The temperature alarm 3 is powered by an independent power supply. When the temperature of the power equipment is too high, the heat of the heat-conducting metal sheets 7 connected thereto increases, thereby deforming and shrinking toward the connectors 2 connected thereto. Then, the upper and lower heat-conducting metal sheets 7 respectively drive the connecting columns 11 and the connecting plates 9 connected thereto to move upward, so that the No. 1 spring 10 is compressed, the pressure column 15 is driven away from the sealing block 14, the degree of compression of the No. 2 spring 13 is reduced, and the distance between the two heat-conducting metal sheets 7 gradually increases, thereby cutting off the circuit to form a short circuit. When the temperature alarm 3 connected to the heat-conducting metal sheet 7 receives the overheating information, it will sound an alarm to remind the staff to cut off the power supply and switch. At this time, the sealing column 5 pushes the helium 6 under the action of the No. 3 spring 18 and applies pressure to the sealing block 14, so that the two groups of sealing blocks 14 enter the interior of the movable groove 8 respectively, thereby opening the through port 16. The No. 2 spring 13 is compressed, and the helium 6 begins to fill the interior of the body 1. Since the helium 6 is a rare gas, it gradually contacts the surface of the heat-conducting metal sheet 7, thereby preventing the contact area between the surface of the heat-conducting metal sheet 7 and the air from being reduced, and preventing the heat-conducting metal sheet 7 from being oxidized. When the gas cylinder 4 and the body 1 are After the internal air pressure is balanced, the pressure of the helium 6 on the sealing block 14 is reduced, and the sealing block 14 is reset under the action of the No. 2 spring 13 and the through-hole 16 is re-sealed; inside the main body 1, the helium 6 continues to cool the surface of the heat-conducting metal sheet 7 and absorbs heat. The thermally expanded helium 6 gradually exerts pressure on the sealing block 14 and opens the gap between the two sealing blocks 14. A part of the helium 6 flows back to the inside of the gas storage cylinder 4 along the through-hole 16. As the heat-conducting metal sheet 7 cools, its deformation surface gradually recovers and drives the connecting plate 9 and the connecting column 11 to move downward. The compression degree of the No. 2 spring 13 gradually increases, and the No. 1 spring 10 begins to gradually recover and pass Pressure is applied to the heat-conducting metal sheet 7 through the connecting plate 9 and the connecting column 11. During this process, on the one hand, the helium 6 uses its own thermal expansion force to enter the interior of the gas cylinder 4. At the same time, the space between the two restored heat-conducting metal sheets 7 is reduced and the positive pressure is used to gradually suppress the helium 6 and return the helium 6 to the interior of the gas cylinder 4. The sealing column 5 continues to move toward its initial position, and the No. 3 spring 18 is re-compressed; when the pressure column 15 is driven to re-contact the sealing block 14, the contact area of ​​the upper and lower sealing blocks 14 is closed, and the gas cylinder 4 is isolated from the inner cavity of the main body 1 again. At this time, the two heat-conducting metal sheets 7 are re-contacted to form a circuit.

[0034] By providing two heat-deformed heat-conducting metal sheets 7, the connecting column 11 and the connecting plate 9 are driven to move in the direction of compressing the No. 1 spring 10, respectively driving the upper and lower groups of pressure columns 15 to move upward and release the limiting pressure on the sealing block 14. As the connecting plate 9 drives the pressure column 15 to gradually move away from the sealing block 14, and the degree of compression of the No. 2 spring 13 gradually decreases, the helium 6 is pressurized by the No. 3 spring 18 and the sealing column 5, so that the two sealing blocks 14 in sealed contact with each other are pushed apart by the air pressure of the helium 6, thereby allowing the helium 6 to enter the interior of the main body 1. Through the contact between the helium 6 and the surface of the heat-conducting metal sheet 7, the heat-conducting metal sheet 7 can be prevented from being corroded faster in a high-temperature environment. Each time the helium 6 enters the interior of the main body 1, a little helium 6 will remain, and then the air can be prevented from further oxidizing and corroding the heat-conducting metal sheet 7.

[0035] The helium 6 that enters the main body 1 will quickly absorb the heat of the heat-conducting metal sheet 7. The compressed No. 1 spring 10 will apply pressure to the heat-conducting metal sheet 7, and then the heat-conducting metal sheet 7 that has gradually returned to normal temperature will be restored. On the one hand, the effective space inside the main body 1 will be compressed to push the helium 6 back to the inside of the gas storage cylinder 4. At the same time, the pressure column 15 will be driven by the connecting column 11 and the connecting plate 9 to move to the position of contact with the sealing block 14, thereby re-blocking the through hole 16. After completing the cooling function, the helium 6 will be pushed back to the inside of the gas storage cylinder 4, and then the two heat-conducting metal sheets 7 will be re-contacted to form a circuit after power failure, which has the advantage of high reliability.

[0036] like Figure 1 、 2 As shown in Figures 5 and 10, in one embodiment, the upper and lower connectors 2 are fixedly sleeved on the top and bottom of the main body 1 in sequence, and the two heat-conducting metal sheets 7 are fixedly connected to the opposite ends of the two connectors 2 in sequence. The probe line of the temperature alarm 3 passes through the balance hole 12 and is fixedly connected to the inner wall of the heat-conducting metal sheet 7. The opposite surfaces of the two heat-conducting metal sheets 7 are in limited contact and the left and right ends are in sealing contact with the left and right sides of the inner wall of the main body 1 respectively.

[0037] The working principle and beneficial effects of the above technical solution are:

[0038] The connector 2 is used to connect the circuit of the power equipment, and forms a loop with the cooperation of the heat-conducting metal sheet 7, so as to maintain the temperature control function of the power equipment. The probe end of the temperature alarm 3 is connected to the inner wall of the heat-conducting metal sheet 7 to conduct heat and maintain the alarm function of the temperature alarm 3. The left and right ends of the heat-conducting metal sheet 7 are sealed in contact with the inner wall of the main body 1, so as to maintain an absolutely sealed space between the upper and lower heat-conducting metal sheets 7, and the balancing hole 12 is connected to the space on the inner wall of the heat-conducting metal sheet 7, which can well balance the internal and external air pressure of the main body 1.

[0039] like Figure 5 、 7As shown, in one embodiment, the sealing strip 17 is made of a rubber block and both left and right ends are in sealing contact with the inner wall of the body 1 , and the sealing strip 17 is fixedly connected to the front and back sides of the heat-conducting metal sheet 7 by gluing.

[0040] The working principle and beneficial effects of the above technical solution are:

[0041] The sealing strip 17 will deform when being squeezed, and form sealing conditions on the front and back sides of the heat-conducting metal sheet 7 by contacting and squeezing the inner wall of the body 1.

[0042] like Figure 2 、 5 As shown in Figures 6 and 10, in one embodiment, a through groove 19 symmetrically distributed up and down is provided on one side of the inner wall of the movable groove 8 close to the center of the main body 1, and the connecting plate 9 extends through the through groove 19 and is clamped on the inner wall of the movable groove 8. The No. 1 spring 10 is located inside the through groove 19 and its two ends are fixedly connected to the connecting plate 9 and the through groove 19 respectively.

[0043] The working principle and beneficial effects of the above technical solution are:

[0044] The other end of the connecting plate 9 extends and is engaged in the through slot 19. The through slot 19 is connected to the movable slot 8. On the one hand, it can be connected to the No. 1 spring 10, and on the other hand, it can provide space for the movement of the connecting plate 9, so that the No. 1 spring 10 has a compressed space. After resetting, the No. 1 spring 10 can assist in driving the heat-conducting metal sheet 7 to restore the state before deformation.

[0045] like Figure 2 、 3 As shown, in one embodiment, the number of sealing blocks 14 is four and they are evenly divided into two groups. The two groups of sealing blocks 14 are respectively sealed and clamped in the middle of the left and right movable grooves 8. Each group of sealing blocks 14 is in the form of upper and lower sealing contact and is sealed in the through opening 16.

[0046] The working principle and beneficial effects of the above technical solution are:

[0047] The opposing surfaces of each set of sealing blocks 14 are in sealed contact under the action of the connecting column 11 and the No. 2 spring 13. After the pressure column 15 moves away from the sealing block 14, the helium 6 pushes the sealing block 14 to move under the action of the sealing column 5 and the No. 3 spring 18, thereby opening the through port 16 and allowing the helium 6 to enter the interior of the main body 1.

[0048] By providing a sealing block 14 that is in sealing contact with each other, after the heat-conducting metal sheet 7 is heated, the pressure column 15 is driven to move through the connecting column 11 and the connecting plate 9 and release the limiting pressure on the sealing block 14, so that the helium 6 applies pressure to the sealing block 14 under the action of the sealing column 5 and the No. 3 spring 18, pushing the sealing block 14 toward the inside of the movable groove 8, and thus entering the interior of the main body 1 after the through port 16 is opened, so that the helium 6 can be used to automatically cool the heat-conducting metal sheet 7 and the air environment inside the main body 1, thereby reducing the impact of the heat-conducting metal sheet 7 under high temperature.

[0049] like Figure 1 、 2 As shown in Figures 4 and 9, in one embodiment, a card groove 41 is opened on the inner wall of the gas storage cylinder 4, and a card block 51 is fixedly connected to the outer surface of the sealing column 5. The card block 51 is sealed and clamped in the card groove 41, and the helium 6 is sealed and filled between the sealing column 5 and the sealing block 14.

[0050] The working principle and beneficial effects of the above technical solution are:

[0051] The sealing column 5 includes two parts, a thin part and a thick part. The thin part is movably connected to the outer opening of the gas storage cylinder 4. The clamping block 51 is fixedly connected to the thick part of the sealing column 5 and is sealed and clamped inside the clamping groove 41. In this way, the sealing function of the helium 6 can be achieved while preventing the sealing column 5 from rotating randomly, reducing the length of the sealing column 5 and saving material design costs.

[0052] like Figure 2 、 3 As shown in Figures 7 and 8, in one embodiment, the No. 2 spring 13 is movably sleeved on the outer surface of the pressure column 15 and its two ends are fixedly connected to the sealing block 14 and the connecting plate 9 respectively. One end of the pressure column 15 facing the sealing block 14 is in limited contact with the sealing block 14. The No. 2 spring 13 is in a compressed state when the upper and lower sealing blocks 14 are in contact.

[0053] The working principle and beneficial effects of the above technical solution are:

[0054] The upper and lower sealing blocks 14 are limitedly supported by the upper and lower sets of pressure columns 15 and the No. 2 spring 13 under the action of the upper and lower heat-conducting metal sheets 7, thereby forming the sealing function of the sealing block 14. The pressure column 15 is designed to be in limited contact with the sealing block 14 but not fixedly connected, so that the rebound force from the No. 2 spring 13 continues to exert pressure on the sealing block 14, thereby realizing the automatic opening and closing function under the pressure of the helium 6.

[0055] like Figure 2 、 5 As shown in , 6 and 10 , in one embodiment, there are four balancing holes 12 and they are respectively opened on the left and right sides of the inner wall of the main body 1 , and the interior of the heat-conducting metal sheet 7 is connected to the outside through the balancing holes 12 .

[0056] The working principle and beneficial effects of the above technical solution are:

[0057] The balancing hole 12 is used to maintain the internal sealing air pressure balance when the heat-conducting metal sheet 7 deforms and moves due to heat, thereby maintaining the sealing function of the sealing area between the two heat-conducting metal sheets 7 inside the body 1.

[0058] like Figure 2 、 3 As shown, in one embodiment, the height of the contact surfaces at the left and right ends of the upper and lower heat-conducting metal sheets 7 is greater than the diameter of the through opening 16 .

[0059] The working principle and beneficial effects of the above technical solution are:

[0060] When the contact surfaces of the two heat-conducting metal sheets 7 are in contact, the left and right ends thereof are blocked by the openings 16 , thereby preventing the helium 6 from leaking into the interior of the body 1 under normal conditions, thereby maintaining the reliability of the device.

[0061] Working principle and usage process:

[0062] The upper and lower connecting heads 2 are connected to the circuit of the power equipment, and the circuit is formed under the cooperation of the two heat-conducting metal sheets 7. The temperature alarm 3 is powered by an independent power supply. When the temperature of the power equipment is too high, the heat-conducting metal sheets 7 connected thereto are heated, thereby generating deformation and shrinkage to the connecting heads 2 connected thereto. Then, the upper and lower heat-conducting metal sheets 7 drive the connecting columns 11 and the connecting plates 9 connected thereto to move upward, so that the first springs 10 are compressed, the pressing columns 15 are driven to move away from the sealing blocks 14, the compression degree of the second springs 13 is reduced, and the distance between the two heat-conducting metal sheets 7 gradually increases, thereby cutting off the circuit to form an open circuit. At the same time, the temperature alarm 3 connected to the heat-conducting metal sheets 7 will issue an alarm after receiving the overheating information, so as to remind the staff to cut off the power supply and the switch. At this time, the sealing columns 5 drive the helium 6 and press the sealing blocks 14 under the action of the third springs 18, so that the two groups of sealing blocks 14 respectively enter the inside of the moving grooves 8, thereby opening the through openings 16, the second springs 13 are compressed, and the helium 6 begins to fill the inside of the body 1. Since the helium 6 is a rare gas, it gradually contacts the surface of the heat-conducting metal sheets 7, thereby avoiding the reduction of the contact area between the surface of the heat-conducting metal sheets 7 and the air and avoiding the oxidation of the heat-conducting metal sheets 7. When the gas pressure in the gas cylinder 4 and the inside of the body 1 is balanced, the pressure of the helium 6 on the sealing blocks 14 is reduced, and the sealing blocks 14 are reset and reseal the through openings 16 under the action of the second springs 13. Inside the body 1, the helium 6 continuously cools and absorbs heat from the surface of the heat-conducting metal sheets 7, and the helium 6 that is heated and expanded gradually presses the sealing blocks 14 and opens the gap between the two sealing blocks 14. Part of the helium 6 flows back to the inside of the gas cylinder 4 along the through openings 16. As the heat-conducting metal sheets 7 cool down, the deformation surface gradually recovers and drives the connecting plates 9 and the connecting columns 11 to move downward. The compression degree of the second springs 13 gradually increases, and the first springs 10 gradually recover and press the heat-conducting metal sheets 7 through the connecting plates 9 and the connecting columns 11. In this process, on the one hand, the helium 6 enters the inside of the gas cylinder 4 by using its own thermal expansion force. On the other hand, the space between the two heat-conducting metal sheets 7 that recover is reduced and gradually presses the helium 6 by using the positive pressure, so that the helium 6 returns to the inside of the gas cylinder 4. The sealing columns 5 continuously move to the initial position, and the third springs 18 are re-compressed. When the pressing columns 15 are driven to contact the sealing blocks 14 again, the contact area of the upper and lower sealing blocks 14 is closed, and the gas cylinder 4 is isolated from the inner cavity of the body 1. At this time, the two heat-conducting metal sheets 7 re-contact and form a circuit.

[0063] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0064] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature control and alarm device for electric power equipment, comprising a main body (1), two connectors (2) and a temperature alarm (3), wherein one end of the inner side of the connector (2) is fixedly connected to a heat-conducting metal sheet (7), and characterized in that: The inner wall of the body (1) is provided with a movable groove (8) and a through-hole (16) on both sides. The inner wall of the heat-conducting metal sheet (7) is fixedly connected to a connecting plate (9) via a connecting column (11). The bottom of the connecting plate (9) extends to the inside of the movable groove (8) and is fixedly connected to a No. 2 spring (13) and a pressure column (15). The other end of the No. 2 spring (13) is fixedly connected to a sealing block (14). The inner wall of the body (1) is provided with a balancing hole (12). The left and right sides of the body (1) are fixedly connected to an air cylinder (4). The inner wall of the air cylinder (4) is sealed with a sealing column (5). ), the outer surface of the sealing column (5) is movably sleeved with a No. 3 spring (18) and the two ends of the No. 3 spring (18) are fixedly connected to the gas cylinder (4) and the sealing column (5), respectively. The interior of the gas cylinder (4) is filled with helium (6). The outer surface of the heat-conducting metal sheet (7) is fixedly connected with a sealing strip (17). The interior of the movable groove (8) is provided with a No. 1 spring (10) fixedly connected to the connecting plate (9). The upper and lower connecting heads (2) are fixedly sleeved on the top and bottom of the main body (1) in sequence. The two heat-conducting metal sheets (7) are fixedly connected to the opposite ends of the two connecting heads (2) in sequence. The probe connection line of the temperature alarm (3) passes through the balance hole (12) and is fixedly connected to the inner wall of the heat-conducting metal sheet (7). The opposite surfaces of the two heat-conducting metal sheets (7) are in limited contact and the left and right ends are respectively in sealed contact with the left and right sides of the inner wall of the body (1). The inner wall of the movable groove (8) is provided with a through groove (19) symmetrically distributed up and down on one side close to the center of the body (1). The connecting plate (9) extends through the through groove (19) and is connected to the inner wall of the movable groove (8). The No. 1 spring (10) is located inside the through groove (19) and its two ends are respectively fixedly connected to the connecting plate (9) and the through groove (19). The gas cylinder ( 4) is provided with a card slot (41), the outer surface of the sealing column (5) is fixedly connected with a card block (51), the card block (51) is sealed and carded in the card slot (41), the helium (6) is sealed and filled between the sealing column (5) and the sealing block (14), the second spring (13) is movably sleeved on the outer surface of the pressure column (15) and the two ends are fixedly connected to the sealing block (14) and the connecting plate (9) respectively, the end of the pressure column (15) facing the sealing block (14) is in limited contact with the sealing block (14), and the second spring (13) is in a compressed state when the upper and lower sealing blocks (14) are in contact.

2. A temperature control and alarm device for electric power equipment according to claim 1, characterized in that: The number of the sealing blocks (14) is four and they are evenly divided into two groups. The two groups of sealing blocks (14) are respectively sealed and clamped in the middle of the left and right movable grooves (8). Each group of sealing blocks (14) is in the form of upper and lower sealing contact and is sealed in the through opening (16).

3. The temperature control and alarm device for electric power equipment according to claim 1, characterized in that: The number of the balancing holes (12) is four and they are respectively opened on the left and right sides of the inner wall of the body (1); the interior of the heat-conducting metal sheet (7) is connected to the outside through the balancing holes (12).

4. The temperature control and alarm device for electric power equipment according to claim 1, characterized in that: The heights of the contact surfaces at the left and right ends of the upper and lower heat-conducting metal sheets (7) are greater than the diameter of the through opening (16).

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