A high-voltage metering cabinet pressure loss alarm device and method

Abstract

The present invention relates to the technical field of metering cabinets, specifically a high-voltage metering cabinet pressure loss alarm device, comprising a metering cabinet body, a cabinet door hinged on the left side of the front end face of the metering cabinet body, a storage plate fixedly installed inside the metering cabinet body, a pressure loss alarm mechanism provided inside the metering cabinet body, a heat dissipation mechanism provided at the upper end of the metering cabinet body, a motor fixedly installed at the upper end of the metering cabinet body, an output shaft provided at the right end of the motor, a magnet 1 fixedly installed at the right end of the output shaft, and a coil sleeved on the outer surface of the magnet 1. The present invention sets a pressure loss alarm mechanism and uses a pressure sensor to perform real-time detection of the situation inside the metering cabinet body. When a pressure loss occurs, the motor rotates and carries the magnet 1 to rotate in the coil to generate current to supply the electromagnet, thereby magnetically attracting the magnet 2, further disconnecting the circuit of the metering cabinet body, and thus providing safety protection for the metering cabinet body.

Description

Technical Field

[0001] The present invention relates to the technical field of metering cabinets, and in particular to a pressure loss alarm device and method for a high-voltage metering cabinet. Background Art

[0002] Metering cabinet is the abbreviation of electric energy metering cabinet (box), which is a kind of electric energy metering device. It is a special electrical equipment used to monitor, manage and control the power load and power consumption of power users.

[0003] The existing patent (publication number: CN215495367U) 35KV meter cabinet pressure loss alarm device uses a relay drive component to drive the control bell action, which can respond accurately and quickly when the meter cabinet fails; the detection signal amplification component and the detection instrument are used to detect and identify the status parameters of the meter cabinet to determine whether the meter cabinet has failed; the power supply component provides a stable power supply voltage to the controller to ensure the long-term stable operation of the meter cabinet; the timer records the time point when the meter cabinet fails, which facilitates staff to trace and query data. It has the advantages of high efficiency, practicality and easy operation.

[0004] Although the above patent is provided with an alarm device, a large amount of heat energy will accumulate inside the meter cabinet due to the operation of the electrical equipment, which will damage the electrical equipment inside the meter cabinet, thereby affecting the service life and causing the meter cabinet to malfunction frequently.

[0005] Therefore, a device and method for alarming loss of pressure in a high-voltage metering cabinet are proposed. Summary of the Invention

[0006] The object of the present invention is to provide a high-voltage metering cabinet pressure loss alarm device and method to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-voltage metering cabinet under-pressure alarm device, comprising a metering cabinet body, a cabinet door hinged on the left side of the front end surface of the metering cabinet body, a storage plate fixedly installed inside the metering cabinet body, a under-pressure alarm mechanism provided inside the metering cabinet body, a heat dissipation mechanism provided on the upper end of the metering cabinet body, the under-pressure alarm mechanism comprising a motor fixedly installed on the upper end of the metering cabinet body, an output shaft provided on the right end of the motor, a magnet fixedly installed on the right end of the output shaft, and a sleeve provided on the outer surface of the magnet. The coil is fixedly connected to the main body of the metering cabinet, a sliding rod is provided on the right side of the coil, a connecting rod is fixedly installed on the outer surface of the sliding rod, two sets of contacts are fixedly installed on the upper end of the metering cabinet main body corresponding to the two ends of the connecting rod, a second magnet is provided on the upper inner side of the metering cabinet main body, the sliding rod passes through the metering cabinet main body and extends to the interior and is fixedly connected to the second magnet, an electromagnet is fixedly installed on the upper inner end of the metering cabinet main body corresponding to the second magnet, a spring is fixedly installed between the electromagnet and the second magnet, and a pressure sensor is fixedly installed inside the metering cabinet main body.

[0008] Preferably, the pressure sensor and the electromagnet are electrically connected to the coil via a wire, and the two sets of contacts are respectively connected to the circuits provided in the metering cabinet body.

[0009] Preferably, the heat dissipation mechanism includes a gear 1 fixedly mounted on the outer surface of the output shaft, a gear 2 meshing with the front side of the gear 1, a rotating rod fixedly mounted on the right end of the gear 2, a sleeve sleeved on the outer surface of the rotating rod, the sleeve fixedly connected to the metering cabinet body, a transmission column provided inside the sleeve, a piston plate provided on the right side of the transmission column, the piston plate slidingly connected to the inside of the sleeve, the outer surface of the rotating rod rotatably connected to a support member, and the support member fixedly connected to the metering cabinet body.

[0010] Preferably, the heat dissipation mechanism also includes an S-shaped transmission groove on the outer surface of the transmission column, the rotating rod is fixedly connected to the transmission column, a push rod is provided on the upper side of the transmission column, the push rod is L-shaped, and one end of the push rod is slidably connected to the inside of the transmission groove, a sliding sleeve is fixedly installed on the inner wall of the sleeve, the push rod is slidably connected to the inside of the sliding sleeve, and the push rod is fixedly connected to the piston plate.

[0011] Preferably, an input pipe is connected to the upper side of the outer surface of the sleeve, an output pipe is connected to the right end of the sleeve, a heat exchange pipe is fixedly installed inside the metering cabinet body, the input pipe is connected to one end of the heat exchange pipe, the output pipe is connected to the other end of the heat exchange pipe, and a condenser is provided on the left side of the sleeve, and the condenser is sleeved on the outer surface of the input pipe.

[0012] Preferably, a worm is fixedly mounted on the outer surface of the output shaft, a gear three is meshed with the rear side of the worm, a rotating shaft is fixedly mounted on the lower end of the gear three, a filter is fixedly mounted on the upper end of the interior of the metering cabinet body, fan blades are arranged inside the filter, and the rotating shaft passes through the metering cabinet body and extends to the interior of the filter and is fixedly connected to the fan blades.

[0013] Preferably, the fan blades are provided in multiple groups and are dispersedly arranged in a ring shape.

[0014] A method for alarming a loss of pressure in a high-voltage metering cabinet comprises the following steps:

[0015] S1: Pressure loss alarm: First, a pressure sensor connected to the circuit is installed inside the metering cabinet. When the circuit inside the metering cabinet loses pressure, the electromagnet generates magnetic force, which then attracts the second magnet, causing the second magnet to push the slide rod upward, thereby disconnecting the connection between the connecting rod and the contact, thereby disconnecting the power supply of the metering cabinet for safety protection;

[0016] S2: Water cooling: By starting the motor, the motor's output shaft rotates gear 1, which in turn rotates the rotating rod. The rotating rod rotates the transmission column, which in turn rotates the piston plate through the transmission groove. This pumps the water in the heat exchange tube and cooperates with the condenser to cool the metering cabinet.

[0017] S3: Air cooling: Secondly, the output shaft rotates and drives the worm to rotate. The worm and the gear at the upper end of the shaft are meshed to drive the fan blades inside the filter, so that the outside air is blown into the interior of the metering cabinet body for air cooling.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention provides a pressure loss alarm mechanism and utilizes a pressure sensor to perform real-time detection of the internal conditions of the metering cabinet body. When a pressure loss occurs, the motor rotates, carrying the first magnet in the coil to generate current to supply the electromagnet, thereby magnetically attracting the second magnet and further disconnecting the circuit of the metering cabinet body, thereby providing safety protection for the metering cabinet body.

[0020] 2. The heat dissipation mechanism provided in the present invention utilizes the motor to rotate to drive the fan blades to rotate so as to perform air cooling and heat dissipation. Secondly, it also pushes the piston plate to reciprocate inside the sleeve so as to cause the water in the heat exchange tube to flow, and cooperates with the condenser for cooling, thereby performing water cooling on the metering cabinet body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is an enlarged schematic diagram of point A in Figure 1 of the present invention;

[0024] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 4 This is an enlarged schematic diagram of point B in Figure 3 of the present invention;

[0026] Figure 5 is a cross-sectional view of the sleeve of the present invention;

[0027] Figure 6 This is an enlarged schematic diagram of point C in Figure 5 of the present invention;

[0028] Figure 7 It is a cross-sectional view of the pressure loss alarm mechanism of the present invention;

[0029] Figure 8 It is an enlarged schematic diagram of point D in the same figure 7 of the present invention.

[0030] Explanation of the accompanying reference numerals: 1 metering cabinet body, 2 cabinet door, 3 storage plate, 4 motor, 5 output shaft, 6 gear 1, 7 gear 2, 8 rotating rod, 9 sleeve, 10 transmission column, 11 sliding sleeve, 12 push rod, 13 piston plate, 14 transmission groove, 15 input pipe, 16 output pipe, 17 heat exchange pipe, 18 condenser, 19 support, 20 worm, 21 gear 3, 22 rotating shaft, 23 filter, 24 fan blade, 25 coil, 26 magnet 1, 27 sliding rod, 28 contact, 29 connecting rod, 30 magnet 2, 31 spring, 32 electromagnet, 33 pressure sensor. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figures 1 to 8, the present invention provides a technical solution:

[0033] A high-voltage metering cabinet pressure loss alarm device includes a metering cabinet body 1, a cabinet door 2 is hinged on the left side of the front end surface of the metering cabinet body 1, a storage plate 3 is fixedly installed inside the metering cabinet body 1, a pressure loss alarm mechanism is provided inside the metering cabinet body 1, and a heat dissipation mechanism is provided at the upper end of the metering cabinet body 1. The pressure loss alarm mechanism includes a motor 4 fixedly installed at the upper end of the metering cabinet body 1, an output shaft 5 is provided at the right end of the motor 4, a magnet 26 is fixedly installed at the right end of the output shaft 5, a coil 25 is sleeved on the outer surface of the magnet 26, and the coil 25 is fixedly connected to the metering cabinet body 1. A sliding rod 27 is provided on the right side of the coil 25, and a connecting rod 29 is fixedly installed on the outer surface of the sliding rod 27. Two sets of contacts 28 are fixedly installed at the two ends of the connecting rod 29 corresponding to the upper end of the metering cabinet body 1. A magnet 2 30 is provided on the upper inner side of the metering cabinet body 1. The sliding rod 27 penetrates the metering cabinet body 1 and extends to the interior and is fixedly connected to the magnet 2 30. An electromagnet 32 is fixedly installed on the upper inner end of the metering cabinet body 1 corresponding to the magnet 2 30. A spring 31 is fixedly installed between the electromagnet 32 and the magnet 2 30. A pressure sensor 33 is fixedly installed inside the metering cabinet body 1.

[0034] Furthermore, in this application, it is first necessary to explain that a one-way input valve is provided inside the input pipe 15, and a one-way output valve is provided inside the output pipe 16. When a pressure loss occurs inside the metering cabinet body 1, the pressure sensor connected to the line will detect it immediately and control the motor 4 to rotate, so that the output shaft 5 of the motor 4 carries the magnet 26 to rotate synchronously in the coil 25, thereby cutting the magnetic field of the coil 25, causing the coil 25 to generate current and supply it to the electromagnet 32.

[0035] Specific examples Figures 1 to 8 As shown, the pressure sensor 33 and the electromagnet 32 are electrically connected to the coil 25 through wires, and the two sets of contacts 28 are respectively connected to the circuits set in the metering cabinet body 1.

[0036] Further in this application, the electromagnet 32 is then turned on, the electromagnet 32 generates magnetic force, and magnetically attracts the magnet 2 30 to rise, and the magnet 2 30 will carry the slide 27 up, and the connecting rod 29 set at the upper end of the slide 27 will rise synchronously, thereby disconnecting the mutual connection between the two sets of contacts 28, and then disconnecting the power supply of the entire metering cabinet body 1.

[0037] Specific examples Figures 1 to 8As shown, the heat dissipation mechanism includes a gear 1 6 fixedly mounted on the outer surface of the output shaft 5, a gear 2 7 is meshed with the front side of the gear 1 6, a rotating rod 8 is fixedly mounted on the right end of the gear 2 7, a sleeve 9 is sleeved on the outer surface of the rotating rod 8, the sleeve 9 is fixedly connected to the metering cabinet body 1, a transmission column 10 is provided inside the sleeve 9, a piston plate 13 is provided on the right side of the transmission column 10, the piston plate 13 is slidably connected to the inside of the sleeve 9, the outer surface of the rotating rod 8 is rotatably connected to a support member 19, and the support member 19 is fixedly connected to the metering cabinet body 1.

[0038] Furthermore, in this application, during the use of the metering cabinet main body 1, the motor 4 can be started so that the output shaft 5 of the motor 4 carries the gear 1 6 and the worm 20 to rotate, and the worm 20 will engage and transmit the gear 3 21, so that the gear 3 21 carries the rotating shaft 22 to rotate, and the rotating shaft 22 is fixedly connected to the fan blade 24, so that the inside of the metering cabinet main body 1 is cooled by air under the rotation of the fan blade 24.

[0039] Specific examples Figures 1 to 8 As shown, the heat dissipation mechanism also includes a transmission groove 14 with an S-shaped outer surface of the transmission column 10, the rotating rod 8 is fixedly connected to the transmission column 10, and a push rod 12 is provided on the upper side of the transmission column 10. The push rod 12 is L-shaped, and one end of the push rod 12 is slidably connected to the inside of the transmission groove 14. A sliding sleeve 11 is fixedly installed on the inner wall of the sleeve 9, and the push rod 12 is slidably connected to the inside of the sliding sleeve 11. The push rod 12 is fixedly connected to the piston plate 13.

[0040] Furthermore, in this application, when gear 1 6 rotates, it will engage and transmit gear 2 7 on the upper end of the rotating rod 8, further causing the rotating rod 8 to rotate with the transmission column 10. A transmission groove 14 is provided on the outer surface of the transmission column 10, and one end of the push rod 12 is inserted into the interior of the transmission groove 14.

[0041] Specific examples Figures 1 to 8 As shown, an input pipe 15 is connected to the upper side of the outer surface of the sleeve 9, and an output pipe 16 is connected to the right end of the sleeve 9. A heat exchange pipe 17 is fixedly installed inside the metering cabinet body 1. The input pipe 15 is connected to one end of the heat exchange pipe 17, and the output pipe 16 is connected to the other end of the heat exchange pipe 17. A condenser pipe 18 is provided on the left side of the sleeve 9, and the condenser pipe 18 is sleeved on the outer surface of the input pipe 15.

[0042] Furthermore, in this application, the push rod 12 is caused to reciprocate inside the sleeve 11 and push the piston plate 13 to reciprocate. When the piston plate 13 moves to the left, the hot water in the heat exchange tube 17 is sucked from the metering cabinet body 1 into the condenser 18 for condensation and cooling.

[0043] Specific examples Figures 1 to 8As shown, a worm 20 is fixedly mounted on the outer surface of the output shaft 5, a gear three 21 is meshed with the rear side of the worm 20, a rotating shaft 22 is fixedly mounted on the lower end of the gear three 21, a filter screen 23 is fixedly mounted on the upper end of the interior of the metering cabinet body 1, a fan blade 24 is provided inside the filter screen 23, and the rotating shaft 22 passes through the metering cabinet body 1 and extends to the interior of the filter screen 23 and is fixedly connected to the fan blade 24.

[0044] Furthermore, in the present application, when the piston plate 13 moves to the right, the low-temperature water in the condenser 18 will be discharged into the metering cabinet body 1, and heat exchange will be performed, thereby achieving the purpose of water cooling and heat dissipation.

[0045] Specific examples Figures 1 to 8 As shown, the fan blades 24 are provided in multiple groups and are dispersedly arranged in a ring shape.

[0046] A method for alarming a loss of pressure in a high-voltage metering cabinet comprises the following steps:

[0047] S1: Pressure loss alarm: First, a pressure sensor 33 connected to the circuit is provided inside the metering cabinet body 1. When the circuit inside the metering cabinet body 1 loses pressure, the electromagnet 32 generates magnetic force, which in turn attracts the second magnet 30, causing the second magnet 30 to push the slide rod 27 upward, thereby disconnecting the connection between the connecting rod 29 and the contact 28, thereby disconnecting the power supply of the metering cabinet body 1 for safety protection;

[0048] S2: Water cooling: By starting the motor 4, the output shaft 5 of the motor 4 rotates with the gear 1 6, and the gear 2 7 meshing with the gear 1 6 rotates with the rotating rod 8, and the rotating rod 8 rotates with the transmission column 10. Then, through the action of the transmission groove 14, the push rod 12 pushes the piston plate 13 to reciprocate, thereby pumping the water in the heat exchange tube 17 to flow, and cooperate with the condenser tube 18 to water-cool the metering cabinet body 1;

[0049] S3: Air cooling: Secondly, the output shaft 5 rotates and drives the worm 20 to rotate. The worm 20 engages with the gear 3 21 at the upper end of the rotating shaft 22, so that the rotating shaft 22 carries the fan blades 24 to rotate inside the filter 23, thereby blowing the outside air into the interior of the metering cabinet body 1 for air cooling.

[0050] Working principle: First of all, it should be noted that a one-way input valve is provided inside the input pipe 15, and a one-way output valve is provided inside the output pipe 16. When the pressure loss occurs inside the metering cabinet body 1, the pressure sensor connected to the line will detect it at the first time and control the motor 4 to rotate, so that the output shaft 5 of the motor 4 carries the magnet 1 26 to rotate synchronously in the coil 25, thereby cutting the magnetic field of the coil 25, causing the coil 25 to generate current and supply it to the electromagnet 32, and then turn on the electromagnet 32, the electromagnet 32 generates magnetic force, and magnetically attracts the magnet 2 30 to rise, and the magnet 2 30 will carry the slide rod 27 to rise, and the connecting rod 29 provided on the upper end of the slide rod 27 will rise synchronously, thereby disconnecting the mutual connection between the two sets of contacts 28, and thereby disconnecting the power supply of the entire metering cabinet body 1. Secondly, during the use of the metering cabinet body 1, the motor 4 can be started so that the output shaft 5 of the motor 4 carries the gear 1 6 and the worm When the gear 20 rotates, the worm 20 will mesh with the gear 3 21, so that the gear 3 21 carries the rotating shaft 22 to rotate, and the rotating shaft 22 is fixedly connected to the fan blade 24, so that the inside of the metering cabinet body 1 is cooled by air under the rotation of the fan blade 24. Secondly, when the gear 1 6 rotates, it will mesh with the gear 2 7 on the upper end of the rotating rod 8, further causing the rotating rod 8 to carry the transmission column 10 to rotate. The outer surface of the transmission column 10 is provided with a transmission groove 14, and one end of the push rod 12 is inserted into the transmission groove 14, so that the push rod 12 reciprocates inside the sliding sleeve 11 and pushes the piston plate 13 to reciprocate. When the piston plate 13 moves to the left, the hot water in the heat exchange tube 17 is sucked from the metering cabinet body 1 into the condenser 18 for condensation and cooling. When the piston plate 13 moves to the right, the low-temperature water in the condenser 18 is discharged into the metering cabinet body 1 and heat exchange is performed, thereby achieving the purpose of water cooling and heat dissipation.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-voltage metering cabinet pressure loss alarm device, comprising a metering cabinet body (1), characterized in that: A cabinet door (2) is hingedly connected to the left side of the front end of the metering cabinet body (1); a storage plate (3) is fixedly installed inside the metering cabinet body (1); a pressure loss alarm mechanism is provided inside the metering cabinet body (1); and a heat dissipation mechanism is provided at the upper end of the metering cabinet body (1); The pressure loss alarm mechanism includes a motor (4) fixedly mounted on the upper end of the metering cabinet body (1), an output shaft (5) is provided at the right end of the motor (4), a magnet (26) is fixedly mounted on the right end of the output shaft (5), a coil (25) is sleeved on the outer surface of the magnet (26), the coil (25) is fixedly connected to the metering cabinet body (1), a sliding rod (27) is provided on the right side of the coil (25), a connecting rod (29) is fixedly mounted on the outer surface of the sliding rod (27), and the upper end of the metering cabinet body (1) corresponds to the connecting rod (29). Two sets of contacts (28) are fixedly installed at both ends of the through rod (29); a second magnet (30) is provided on the upper inner side of the metering cabinet body (1); the sliding rod (27) passes through the metering cabinet body (1) and extends to the inner side to be fixedly connected to the second magnet (30); an electromagnet (32) is fixedly installed on the upper inner end of the metering cabinet body (1) corresponding to the second magnet (30); a spring (31) is fixedly installed between the electromagnet (32) and the second magnet (30); and a pressure sensor (33) is fixedly installed inside the metering cabinet body (1); The heat dissipation mechanism comprises a gear 1 (6) fixedly mounted on the outer surface of the output shaft (5), a gear 2 (7) meshing with the front side of the gear 1 (6), a rotating rod (8) fixedly mounted on the right end of the gear 2 (7), a sleeve (9) sleeved on the outer surface of the rotating rod (8), the sleeve (9) being fixedly connected to the metering cabinet body (1), a transmission column (10) being arranged inside the sleeve (9), a piston plate (13) being arranged on the right side of the transmission column (10), the piston plate (13) being slidably connected to the inside of the sleeve (9), a support member (19) being rotatably connected to the outer surface of the rotating rod (8), and the support member (19) being fixedly connected to the metering cabinet body (1).

2. A high-voltage metering cabinet pressure loss alarm device according to claim 1, characterized in that: The pressure sensor (33) and the electromagnet (32) are electrically connected to the coil (25) via a wire, and the two sets of contacts (28) are respectively connected to the circuits provided in the metering cabinet body (1).

3. The pressure loss alarm device for a high-voltage metering cabinet according to claim 1 is characterized in that: The heat dissipation mechanism further comprises a transmission groove (14) provided on the outer surface of the transmission column (10) in an S-shape, the rotating rod (8) being fixedly connected to the transmission column (10), a push rod (12) being provided on the upper side of the transmission column (10), the push rod (12) being provided in an L-shape, and one end of the push rod (12) being slidably connected to the interior of the transmission groove (14), a sliding sleeve (11) being fixedly installed on the inner wall of the sleeve (9), the push rod (12) being slidably connected to the interior of the sliding sleeve (11), and the push rod (12) being fixedly connected to the piston plate (13).

4. The pressure loss alarm device for a high-voltage metering cabinet according to claim 1 is characterized in that: An input pipe (15) is connected to the upper side of the outer surface of the sleeve (9), and an output pipe (16) is connected to the right end of the sleeve (9). A heat exchange pipe (17) is fixedly installed inside the metering cabinet body (1), and one end of the input pipe (15) and the heat exchange pipe (17) are connected to each other, and the other end of the output pipe (16) and the heat exchange pipe (17) are connected to each other. A condensation pipe (18) is provided on the left side of the sleeve (9), and the condensation pipe (18) is sleeved on the outer surface of the input pipe (15).

5. The pressure loss alarm device for a high-voltage metering cabinet according to claim 1 is characterized in that: A worm (20) is fixedly mounted on the outer surface of the output shaft (5), a gear three (21) is meshed with the rear side of the worm (20), a rotating shaft (22) is fixedly mounted on the lower end of the gear three (21), a filter (23) is fixedly mounted on the upper end of the interior of the metering cabinet body (1), a fan blade (24) is provided inside the filter (23), and the rotating shaft (22) passes through the metering cabinet body (1) and extends to the interior of the filter (23) and is fixedly connected to the fan blade (24).

6. A high-voltage metering cabinet pressure loss alarm device according to claim 5, characterized in that: The fan blades (24) are provided in multiple groups and are dispersedly arranged in a ring shape.

7. A method for alarming loss of pressure in a high-voltage metering cabinet applicable to the alarm device according to any one of claims 1 to 6, comprising the following steps: S1: Pressure loss alarm: First, a pressure sensor (33) connected to the circuit is provided inside the metering cabinet body (1). When the circuit inside the metering cabinet body (1) loses pressure, the electromagnet (32) generates magnetic force, which then magnetically attracts the second magnet (30), causing the second magnet (30) to push the slide rod (27) upward, thereby disconnecting the connection between the connecting rod (29) and the contact (28), thereby disconnecting the power supply of the metering cabinet body (1) for safety protection; S2: Water cooling: by starting the motor (4), the output shaft (5) of the motor (4) drives the gear 1 (6) to rotate, the gear 2 (7) meshing with the gear 1 (6) drives the rotating rod (8) to rotate, and the rotating rod (8) drives the transmission column (10) to rotate, and then the push rod (12) drives the piston plate (13) to reciprocate through the action of the transmission groove (14), thereby pumping the water in the heat exchange tube (17) to flow, and cooperating with the condenser tube (18) to water-cool the metering cabinet body (1); S3: Air cooling: Secondly, the output shaft (5) rotates while driving the worm (20), which in turn engages with the gear 3 (21) at the upper end of the rotating shaft (22) to drive the rotating shaft (22) to carry the fan blade (24) to rotate inside the filter (23), thereby blowing the outside air into the interior of the metering cabinet body (1) for air cooling.

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