Modular single-phase electric energy meter

Abstract

The invention relates to the technical field of electric energy meters, and discloses a modular single-phase electric energy meter which comprises a meter shell, a plurality of heat dissipation grooves are formed in the two sides of the meter shell at equal intervals, clamping shafts are arranged on the lower portions of the two sides of the meter shell, a wire groove is formed in the lower portion of one face of the meter shell, and a meter base is installed in the wire groove. The top of the watchcase is provided with a fireproof prevention assembly, and the two sides of the interior of the watchcase are each provided with a heat dissipation blocking piece. According to the modularized single-phase electric energy meter, the meter base can be quickly disassembled and assembled by using the elasticity of the torsional spring and adjusting the shifting plate, a traditional bolt fixing mode is replaced, the disassembly and assembly time of the meter base is saved, circuits of the electric energy meter are convenient to maintain, and when a fire occurs in the electric energy meter, the electric energy meter is convenient to disassemble and assemble. The characteristic that the spiral memory alloy can deform at different temperatures is utilized, a fire can be extinguished automatically, a plurality of fire extinguishing points are arranged, and the fire extinguishing work can be rapidly completed.

Description

Technical Field

[0001] The invention relates to the technical field of electric energy meters, in particular to a modular single-phase electric energy meter. Background Art

[0002] With the continuous development of science and technology, people's demand for electricity meters is getting higher and higher, and electricity meters have become an indispensable part of the power system.

[0003] However, the traditional electric energy meter base is installed and fixed by bolts, which makes it inconvenient to disassemble and thus inconvenient to repair the line. In addition, most of the current electric energy meters do not have fireproof functions. Therefore, it is necessary to develop a modular single-phase electric energy meter with an easy-to-disassemble base and good fireproof performance. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a modular single-phase electric energy meter, which solves the problems of inconvenient assembly and disassembly of the base of the traditional electric energy meter and poor fireproof performance.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a modular single-phase electric energy meter, including a meter case, a plurality of heat dissipation slots are equidistantly arranged on both sides of the meter case, clamping shafts are arranged at the lower part of both sides of the meter case, and a wire groove is arranged at the lower part of one side of the meter case, a meter base is installed in the wire groove, a fire prevention component is arranged on the top of the meter case, and heat dissipation blocks are arranged on both sides of the interior of the meter case.

[0006] The watch base includes a base shell adapted to the wire groove on the watch case, with dial plates rotatably provided on both sides of the base shell, and T-shaped shafts corresponding to the dial plates rotatably provided on both sides of the interior of the base shell, one end of the T-shaped shaft is connected to the dial plate, so that the T-shaped shaft is driven to rotate when the dial plate rotates, and a torsion spring is provided on the outside of the T-shaped shaft, and the two ends of the torsion spring are respectively connected to the inner side of the T-shaped shaft and the inner side of the base shell; after the base shell is completely inserted into the wire groove on the watch case and the torsion spring is in a reset state, the slot on the dial plate is just clamped in the clamping shaft on the watch case.

[0007] Preferably, positioning shafts are provided at the four corners of the base shell on one side close to the watch case, and positioning grooves corresponding to the respective positioning shafts are provided on the inner wall of the wire groove on the watch case. After the base shell is fully inserted into the wire groove, the respective positioning shafts on the base shell are fully inserted into the corresponding positioning grooves.

[0008] Preferably, the heat dissipation baffle comprises a convex plate arranged on the inner wall of the watch case below the heat dissipation groove, a fixed spring is arranged on the upper part of the convex plate, the upper end of the fixed spring is connected to a movable plate, the movable plate is tightly fitted to the inner wall of the watch case, and one side of the movable plate is provided with through grooves with the same number as the heat dissipation grooves, a traction rod is arranged on the upper side of the movable plate, the upper end of the traction rod slides through the inner top side of the watch case and is connected to a traction rope, and when the fixed spring is at its original length, the through grooves on the movable plate correspond exactly to the heat dissipation grooves on the watch case.

[0009] Preferably, the fire prevention component includes a shell arranged on the top side of the outer shell, the lower part of the shell is open and communicated with the interior of the shell, and a partition is horizontally connected to the interior of the shell, a storage space for storing liquid carbon dioxide is formed between the upper part of the partition and the interior of the shell, and a gas nozzle for filling liquid carbon dioxide is also provided on the upper part of the shell, and a limit rod is horizontally connected to the interior of the shell at a position below the partition, a cooling fan is installed at the lower part of the limit rod, and a fire prevention drive component is provided on the outside of the limit rod at one side of the cooling fan, and the bottom center of the partition is sealed longitudinally. A moving rod is inserted in the sliding direction, the upper end of the moving rod is connected to a fixed rod, and a plurality of sealing balls are equidistantly arranged at the lower part of the fixed rod. A discharge hole corresponding to each sealing ball is arranged at the bottom of the partition, the diameter of the sealing ball is larger than the inner diameter of the discharge hole, and the sealing ball is just stuck in the discharge hole to seal it, and a conductive component is arranged on the upper part of the fixed rod, and L-shaped shafts are arranged on the upper sides of both ends of the fixed rod. The L-shaped shaft seal slides longitudinally through the inner top side of the shell, and the end of the L-shaped shaft away from the fixed rod is connected to the end of the traction rope away from the moving plate, and an alarm is installed on the outer top side of the shell.

[0010] Preferably, the fire-proof drive assembly includes a movable sleeve that is laterally slidably sleeved on the outside of the limit rod and a spiral memory alloy, the two ends of the spiral memory alloy are respectively connected to one side of the movable sleeve and the inner wall of the outer shell, and a connecting rod is hinged on the upper part of the side of the movable sleeve away from the spiral memory alloy, and the other end of the connecting rod is hinged to the lower end of the movable rod.

[0011] Preferably, the conductive component includes a fixed shaft connected to the upper part of the fixed rod, the upper end of the fixed shaft is connected to a buffer spring 2, the upper end of the buffer spring 2 is connected to a moving conductive sheet 2, the inner top side of the shell is provided with a fixed conductive sheet 2 corresponding to the moving conductive sheet 2, an L-shaped rod is provided on the upper part of the side of the movable sleeve close to the spiral memory alloy, the other end of the L-shaped rod is connected to a buffer spring 1, the end of the buffer spring 1 away from the L-shaped rod is connected to a moving conductive sheet 1, and the inner side wall of the shell is provided with a fixed conductive sheet 1 corresponding to the moving conductive sheet 1.

[0012] Preferably, the spiral memory alloy will elongate and deform when the temperature is above 70 degrees, and will return to its original shape when the temperature is below 40 degrees. When the spiral memory alloy is elongated and deformed, the connecting rod on the movable sleeve can lift the movable rod. When the spiral memory alloy has completed the elongation and deformation, the sealing ball at the bottom of the fixed rod is completely separated from the discharge hole on the partition, and the through grooves on the movable plate and the heat dissipation grooves on the case are staggered with each other.

[0013] Preferably, when the spiral memory alloy is at its original length, the moving conductive sheet 1 is in contact with the fixed conductive sheet 1, and the moving conductive sheet 2 is not in contact with the fixed conductive sheet 2; when the spiral memory alloy is fully extended, the moving conductive sheet 1 is not in contact with the fixed conductive sheet 1, and the moving conductive sheet 2 is in contact with the fixed conductive sheet 2; when the moving conductive sheet 1 is in contact with the fixed conductive sheet 1, a closed circuit is formed with the cooling fan; when the moving conductive sheet 2 is in contact with the fixed conductive sheet 2, a closed circuit is formed with the alarm.

[0014] The present invention provides a modular single-phase electric energy meter, which has the following beneficial effects compared with the prior art:

[0015] 1. The modular single-phase electric energy meter utilizes the elasticity of the torsion spring and can quickly disassemble and assemble the meter base by adjusting the dial plate, replacing the traditional bolt fixing method, saving the time of disassembling and assembling the meter base and facilitating the maintenance of the electric energy meter line.

[0016] 2. This modular single-phase energy meter can automatically extinguish the fire by utilizing the characteristic of spiral memory alloy that it will deform at different temperatures when a fire occurs inside the energy meter. In addition, multiple fire extinguishing points are set to quickly complete the fire extinguishing work. When extinguishing the fire, the cooling fan can be automatically turned off, and the heat dissipation slot can be sealed to reduce air circulation and isolate oxygen, thereby achieving rapid fire extinguishing. In the event of a fire, it can also automatically sound an alarm to remind personnel to discover it in time and reduce losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the watch case of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the watch base of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the heat dissipation baffle of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the fire prevention component of the present invention.

[0022] In the figure: 1, watch case; 2, clamping shaft; 3, watch base; 31, base shell; 32, dial plate; 33, clamping slot; 34, T-shaped shaft; 35, torsion spring; 36, positioning shaft; 4, heat dissipation slot; 5, fire prevention component; 51, shell; 52, partition; 53, limit rod; 54, cooling fan; 55, fire prevention drive component; 551, moving sleeve; 552, spiral memory alloy; 553, connecting rod; 554, L-shaped rod; 555, buffer spring 1; 55 6. Moving conductive sheet 1; 557. Fixed conductive sheet 1; 56. Moving rod; 57. Fixed rod; 58. Conductive component; 581. Fixed shaft; 582. Buffer spring 2; 583. Moving conductive sheet 2; 584. Fixed conductive sheet 2; 59. Sealing ball; 510. Discharge hole; 511. Alarm; 512. L-shaped shaft; 6. Heat dissipation block; 61. Convex plate; 62. Fixed spring; 63. Moving plate; 64. Through slot; 65. Traction rod; 66. Traction rope. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 5 , the present invention provides three technical solutions:

[0025] Embodiment 1

[0026] See also Figure 1 and Figure 2 In an embodiment of the present invention, a modular single-phase electric energy meter includes a meter case 1, a plurality of heat dissipation slots 4 are equidistantly arranged on both sides of the meter case 1, a clamping shaft 2 is arranged at the lower part of both sides of the meter case 1, and a wire groove is arranged at the lower part of one side of the meter case 1, a meter base 3 is installed in the wire groove, a fire prevention component 5 is arranged on the top of the meter case 1, and heat dissipation blocks 6 are arranged on both sides of the inside of the meter case 1.

[0027] See also Figure 3In the embodiment of the present invention, the watch base 3 includes a base shell 31 adapted to the wire groove on the watch case 1, and dial plates 32 are rotatably provided on both sides of the base shell 31, and T-shaped shafts 34 corresponding to the dial plates 32 are rotatably provided on both sides of the interior of the base shell 31, one end of the T-shaped shaft 34 is connected to the dial plate 32, so that when the dial plate 32 rotates, the T-shaped shaft 34 is driven to rotate, and a torsion spring 35 is sleeved on the outside of the T-shaped shaft 34, and the two ends of the torsion spring 35 are respectively connected to the inner side of the T-shaped shaft 34 and the inner side of the base shell 31. After the base shell 31 is completely inserted into the wire groove on the watch case 1 and the torsion spring 35 is in a reset state, the card slot 33 on the dial plate 32 is just carded in the card shaft 2 on the watch case 1.

[0028] In the above scheme: the elasticity of the torsion spring 35 is utilized to forcefully push the paddle plate 32 upward, and then the base shell 31 is inserted into the wire groove on the watch case 1. After it is completely inserted, the paddle plate 32 is released, and the torsion spring 35 will reset the paddle plate 32, and the card slot 33 on the paddle plate 32 will be inserted into the card shaft 2 on the watch case 1, thereby fixing the base shell 31, and completing the installation of the base shell 31. When disassembling, the paddle plate 32 is pushed upward in the same way to disengage the card slot 33 on the paddle plate 32 from the card shaft 2, and then the base shell 31 is pulled out of the wire groove to complete the disassembly.

[0029] For further information, see Figure 1 and Figure 3 In the embodiment of the present invention, positioning shafts 36 are provided at the four corners of the base shell 31 on the side close to the watch case 1, and the inner wall of the wire groove on the watch case 1 is provided with positioning grooves corresponding to each positioning shaft 36. After the base shell 31 is completely inserted into the wire groove, each positioning shaft 36 on the base shell 31 is just completely inserted into the corresponding positioning groove, which plays a role in positioning the base shell 31 and facilitates the disassembly and assembly of the base shell 31.

[0030] The second embodiment is different from the first embodiment in that:

[0031] See also Figure 2 and Figure 5In the embodiment of the present invention, the fire prevention component 5 includes a shell 51 arranged on the top side of the outer surface of the watch case 1, the lower part of the shell 51 is open and communicated with the interior of the watch case 1, and the interior of the shell 51 is horizontally connected with a partition 52, and a storage space for storing liquid carbon dioxide is formed between the upper part of the partition 52 and the interior of the shell 51, and a gas nozzle for filling liquid carbon dioxide is also provided on the upper part of the shell 51, and the interior of the shell 51 is horizontally connected with a limit rod 53 at a position below the partition 52, and a cooling fan 54 is installed at the lower part of the limit rod 53, and a fire prevention drive component 55 is arranged on the outer side of the limit rod 53 at one side of the cooling fan 54, and a movable seal is inserted through the bottom center of the partition 52 for longitudinal sliding. The movable rod 56 is connected to the upper end of the movable rod 56 with a fixed rod 57, and a plurality of sealing balls 59 are equidistantly arranged at the lower part of the fixed rod 57. The bottom of the partition plate 52 is provided with a discharge hole 510 corresponding to each sealing ball 59. The diameter of the sealing ball 59 is larger than the inner diameter of the discharge hole 510, and the sealing ball 59 is just stuck into the discharge hole 510 to seal it. A conductive component 58 is provided on the upper part of the fixed rod 57, and L-shaped shafts 512 are provided on the upper sides of both ends of the fixed rod 57. The L-shaped shaft 512 seals and slides longitudinally through the inner top side of the shell 51, and the end of the L-shaped shaft 512 away from the fixed rod 57 is connected to the end of the traction rope 66 away from the movable plate 63, and an alarm 511 is installed on the outer top side of the shell 51.

[0032] See also Figure 2 and Figure 5 In the embodiment of the present invention, the fire-proof drive assembly 55 includes a movable sleeve 551 which is laterally slidably sleeved on the outside of the limit rod 53 and a spiral memory alloy 552. The two ends of the spiral memory alloy 552 are respectively connected to one side of the movable sleeve 551 and the inner wall of the outer shell 51, and a connecting rod 553 is hinged on the upper part of the side of the movable sleeve 551 away from the spiral memory alloy 552, and the other end of the connecting rod 553 is hinged to the lower end of the movable rod 56.

[0033] See also Figure 2 and Figure 4 In the embodiment of the present invention, the spiral memory alloy 552 will undergo elongation deformation when the temperature is above 70 degrees, and will return to its original state when the temperature is below 40 degrees. When the spiral memory alloy 552 is elongated and deformed, the connecting rod 553 on the movable sleeve 551 can lift the movable rod 56. When the spiral memory alloy 552 is elongated and deformed, the sealing ball 59 at the lower part of the fixed rod 57 is completely separated from the discharge hole 510 on the partition 52, and the through grooves 64 on the movable plate 63 are staggered with the heat dissipation grooves 4 on the case 1.

[0034] In the above scheme: when a fire occurs and the temperature inside the watch case 1 reaches above 70 degrees, the spiral memory alloy 552 will reach the deformation temperature, and the spiral memory alloy 552 will stretch, thereby pushing the movable sleeve 551 to move, and the connecting rod 553 on the movable sleeve 551 will push the movable rod 56 to move upward, and the movable rod 56 will push the fixed rod 57 to move upward, and the sealing balls 59 on the lower side of the fixed rod 57 will open the discharge holes 510 on the partition 52. At this time, the liquid carbon dioxide in the storage space above the partition 52 will be ejected from the discharge holes 510, thereby quickly completing the fire extinguishing work.

[0035] Embodiment 3 is different from Embodiment 1 in that:

[0036] See also Figure 2 and Figure 4 In the embodiment of the present invention, the heat dissipation blocking member 6 includes a convex plate 61 arranged on the inner wall of the watch case 1 at a position below the heat dissipation groove 4, a fixed spring 62 is arranged on the upper part of the convex plate 61, and the upper end of the fixed spring 62 is connected to a movable plate 63, the movable plate 63 is tightly fitted on the inner wall of the watch case 1, and one side of the movable plate 63 is provided with through grooves 64 with the same number as the heat dissipation grooves 4, a traction rod 65 is arranged on the upper side of the movable plate 63, the upper end of the traction rod 65 slides through the inner top side of the watch case 1 and is connected to a traction rope 66, when the fixed spring 62 is at its original length, each through groove 64 on the movable plate 63 corresponds exactly to each heat dissipation groove 4 on the watch case 1.

[0037] See also Figure 2 and Figure 4 In the embodiment of the present invention, the conductive component 58 includes a fixed shaft 581 connected to the upper part of the fixed rod 57, the upper end of the fixed shaft 581 is connected to a buffer spring 582, the upper end of the buffer spring 582 is connected to a dynamic conductive sheet 583, the inner top side of the shell 51 is provided with a fixed conductive sheet 584 corresponding to the dynamic conductive sheet 583, an L-shaped rod 554 is provided on the upper part of the side of the movable sleeve 551 close to the spiral memory alloy 552, the other end of the L-shaped rod 554 is connected to a buffer spring 555, the end of the buffer spring 555 away from the L-shaped rod 554 is connected to a dynamic conductive sheet 556, and the inner side wall of the shell 51 is provided with a fixed conductive sheet 557 corresponding to the dynamic conductive sheet 556.

[0038] See also Figure 2 and Figure 4In the embodiment of the present invention, when the spiral memory alloy 552 is in its original length, the moving conductive sheet 1 556 is in contact with the fixed conductive sheet 1 557, and the moving conductive sheet 2 583 is not in contact with the fixed conductive sheet 2 584; when the spiral memory alloy 552 is in full extension, the moving conductive sheet 1 556 is not in contact with the fixed conductive sheet 1 557, and the moving conductive sheet 2 583 is in contact with the fixed conductive sheet 2 584; when the moving conductive sheet 1 556 and the fixed conductive sheet 1 557 are in contact, a closed circuit is formed with the cooling fan 54; when the moving conductive sheet 2 583 and the fixed conductive sheet 2 584 are in contact, a closed circuit is formed with the alarm 511.

[0039] In the above scheme: when the spiral memory alloy 552 reaches the deformation temperature and stretches, the movable sleeve 551 will drive the L-shaped rod 554 to move, so that the movable conductive sheet 1 556 is separated from the position of the fixed conductive sheet 1 557, thereby turning off the power of the cooling fan 54, and the cooling fan 54 will not work, reducing the air flow inside the watch case 1. When the fixed rod 57 moves upward, it will drive the fixed shaft 581 to move upward, so that the movable conductive sheet 2 583 is in contact with the fixed conductive sheet 2 584, and the power of the alarm 511 is turned on. The alarm 511 will sound an alarm to remind personnel, and when the fixed rod 57 moves upward, it will drive the L-shaped shaft 512 to move upward, and one end of the L-shaped shaft 512 will pull the traction rope 66 to move upward. The traction rope 66 pulls the traction rod 65 upward, so that the traction rod 65 drives the movable plate 63 to move upward, so that the various through grooves 64 on the movable plate 63 and the various heat dissipation slots 4 on the watch case 1 are staggered with each other, and the heat dissipation slots 4 are sealed to isolate the air, thereby achieving rapid fire extinguishing.

[0040] Working principle: Use the elasticity of the torsion spring 35 to forcefully push the dial plate 32 upward, and then insert the base shell 31 into the wire groove on the watch case 1. After it is completely inserted, release the dial plate 32, and the torsion spring 35 will reset the dial plate 32, and the card slot 33 on the dial plate 32 will be stuck in the card shaft 2 on the watch case 1, and the base shell 31 will be fixed, and the installation of the base shell 31 is completed. When disassembling, use the same method to push the dial plate 32 upward to disengage the card slot 33 on the dial plate 32 from the card shaft 2, and then pull the base shell 31 out of the wire groove to complete the disassembly.

[0041] When a fire occurs and the temperature inside the watch case 1 reaches above 70 degrees, the spiral memory alloy 552 will reach the deformation temperature, and the spiral memory alloy 552 will stretch, thereby pushing the movable sleeve 551 to move, and the connecting rod 553 on the movable sleeve 551 will push the movable rod 56 to move upward, and the movable rod 56 will push the fixed rod 57 to move upward, and the sealing balls 59 on the lower side of the fixed rod 57 will open the discharge holes 510 on the partition 52. At this time, the liquid carbon dioxide in the storage space above the partition 52 will be ejected from the discharge holes 510, thereby quickly completing the fire extinguishing work;

[0042] When the spiral memory alloy 552 reaches the deformation temperature and stretches, the movable sleeve 551 drives the L-shaped rod 554 to move, so that the movable conductive sheet 1 556 is separated from the fixed conductive sheet 1 557, thereby turning off the power of the cooling fan 54, and the cooling fan 54 will not work, reducing the air flow inside the case 1, and when the fixed rod 57 moves upward, it drives the fixed shaft 581 to move upward, so that the movable conductive sheet 2 583 contacts the fixed conductive sheet 2 584, and the power of the alarm 511 is turned on, and the alarm 511 will sound an alarm to remind personnel;

[0043] When the fixed rod 57 moves upward, it will drive the L-shaped shaft 512 to move upward. One end of the L-shaped shaft 512 will pull the traction rope 66 upward. The traction rope 66 will pull the traction rod 65 upward, so that the traction rod 65 drives the movable plate 63 to move upward, so that the through grooves 64 on the movable plate 63 and the heat dissipation grooves 4 on the watch case 1 are staggered with each other, the heat dissipation grooves 4 are sealed, and the air is isolated, thereby achieving rapid fire extinguishing.

[0044] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A modular single-phase electric energy meter, comprising a meter case (1), wherein a plurality of heat dissipation slots (4) are equidistantly arranged on both sides of the meter case (1), characterized in that: A clamping shaft (2) is provided at the lower part of both sides of the watch case (1), and a wire groove is provided at the lower part of one side of the watch case (1), in which a watch base (3) is installed, a fire prevention component (5) is provided at the top of the watch case (1), and heat dissipation blocks (6) are provided at both sides of the interior of the watch case (1); The watch base (3) comprises a base shell (31) adapted to the wire groove on the watch case (1), and dial plates (32) are rotatably provided on both sides of the base shell (31), and T-shaped shafts (34) corresponding to the dial plates (32) are rotatably provided on both sides of the interior of the base shell (31), one end of the T-shaped shaft (34) is connected to the dial plate (32), so that when the dial plate (32) rotates, the T-shaped shaft (34) is driven to rotate, and a torsion spring (35) is sleeved on the outside of the T-shaped shaft (34), and the two ends of the torsion spring (35) are respectively connected to the inner side of the T-shaped shaft (34) and the inner side of the base shell (31), and when the base shell (31) is completely inserted into the wire groove on the watch case (1) and the torsion spring (35) is in a reset state, the card slot (33) on the dial plate (32) is just carded into the card shaft (2) on the watch case (1).

2. A modular single-phase electric energy meter according to claim 1, characterized in that: The base shell (31) is provided with positioning shafts (36) at four corners on one side close to the watch case (1), and the inner wall of the wire groove on the watch case (1) is provided with positioning grooves corresponding to the positioning shafts (36). After the base shell (31) is completely inserted into the wire groove, the positioning shafts (36) on the base shell (31) are completely inserted into the corresponding positioning grooves.

3. A modular single-phase electric energy meter according to claim 1, characterized in that: The heat dissipation blocking member (6) comprises a convex plate (61) arranged on the inner wall of the watch case (1) at a position below the heat dissipation groove (4); a fixed spring (62) is arranged on the upper part of the convex plate (61); the upper end of the fixed spring (62) is connected to a movable plate (63); the movable plate (63) is tightly fitted on the inner wall of the watch case (1); one side of the movable plate (63) is provided with through grooves (64) having the same number as the heat dissipation grooves (4); a traction rod (65) is arranged on the upper side of the movable plate (63); the upper end of the traction rod (65) slides through the inner top side of the watch case (1) and is connected to a traction rope (66); when the fixed spring (62) is at its original length, each through groove (64) on the movable plate (63) corresponds exactly to each heat dissipation groove (4) on the watch case (1).

4. A modular single-phase electric energy meter according to claim 3, characterized in that: The fire prevention component (5) comprises a shell (51) arranged on the top side of the outer surface of the watch case (1), the lower part of the shell (51) is open and communicates with the interior of the watch case (1), and a partition (52) is horizontally connected to the interior of the shell (51), and a storage space for storing liquid carbon dioxide is formed between the upper part of the partition (52) and the interior of the shell (51), and a gas nozzle for filling liquid carbon dioxide is also arranged on the upper part of the shell (51), and a limit rod (53) is horizontally connected to the interior of the shell (51) at a position below the partition (52), a cooling fan (54) is installed at the lower part of the limit rod (53), and a fire prevention drive component (55) is arranged on the outer side of the limit rod (53) at one side of the cooling fan (54), and a moving rod (56) is inserted through the center of the bottom of the partition (52) in a sealed longitudinal sliding manner, and the moving rod The upper end of the (56) is connected to a fixing rod (57), and a plurality of sealing balls (59) are equidistantly arranged at the lower part of the fixing rod (57). The bottom of the partition (52) is provided with a discharge hole (510) corresponding to each sealing ball (59), the diameter of the sealing ball (59) is larger than the inner diameter of the discharge hole (510), and the sealing ball (59) is just stuck in the discharge hole (510) to seal it, and a conductive component (58) is arranged on the upper part of the fixing rod (57), and L-shaped shafts (512) are arranged on the upper sides of both ends of the fixing rod (57). The L-shaped shaft (512) seals and slides longitudinally through the inner top side of the shell (51), and the end of the L-shaped shaft (512) away from the fixing rod (57) is connected to the end of the traction rope (66) away from the moving plate (63), and an alarm (511) is installed on the outer top side of the shell (51).

5. A modular single-phase electric energy meter according to claim 4, characterized in that: The fireproof drive assembly (55) comprises a movable sleeve (551) which is laterally slidably sleeved on the outside of the limit rod (53) and a spiral memory alloy (552), the two ends of the spiral memory alloy (552) being respectively connected to one side of the movable sleeve (551) and the inner wall of the outer shell (51), and a connecting rod (553) is hingedly connected to the upper part of the side of the movable sleeve (551) away from the spiral memory alloy (552), and the other end of the connecting rod (553) is hingedly connected to the lower end of the movable rod (56).

6. A modular single-phase electric energy meter according to claim 5, characterized in that: The conductive component (58) comprises a fixed shaft (581) connected to the upper part of the fixed rod (57); the upper end of the fixed shaft (581) is connected to a second buffer spring (582); the upper end of the second buffer spring (582) is connected to a second moving conductive sheet (583); the inner top side of the housing (51) is provided with a second fixed conductive sheet (584) corresponding to the second moving conductive sheet (583); the upper part of the movable sleeve (551) close to the spiral memory alloy (552) is provided with an L-shaped rod (554); the other end of the L-shaped rod (554) is connected to a first buffer spring (555); the end of the first buffer spring (555) away from the L-shaped rod (554) is connected to a first moving conductive sheet (556); and the inner side wall of the housing (51) is provided with a first fixed conductive sheet (557) corresponding to the first moving conductive sheet (556).

7. A modular single-phase electric energy meter according to claim 5, characterized in that: The spiral memory alloy (552) will undergo elongation deformation when the temperature is above 70 degrees, and will return to its original state when the temperature is below 40 degrees. When the spiral memory alloy (552) is elongated and deformed, the connecting rod (553) on the movable sleeve (551) can lift the movable rod (56). When the spiral memory alloy (552) is completely elongated and deformed, the sealing ball (59) at the lower part of the fixed rod (57) is completely separated from the discharge hole (510) on the partition (52), and the through grooves (64) on the movable plate (63) and the heat dissipation grooves (4) on the watch case (1) are staggered.

8. A modular single-phase electric energy meter according to claim 6, characterized in that: When the spiral memory alloy (552) is at its original length, the moving conductive sheet 1 (556) contacts the fixed conductive sheet 1 (557), and the moving conductive sheet 2 (583) does not contact the fixed conductive sheet 2 (584); when the spiral memory alloy (552) is fully extended, the moving conductive sheet 1 (556) does not contact the fixed conductive sheet 1 (557), and the moving conductive sheet 2 (583) contacts the fixed conductive sheet 2 (584); when the moving conductive sheet 1 (556) contacts the fixed conductive sheet 1 (557), a closed circuit is formed with the heat dissipation fan (54); when the moving conductive sheet 2 (583) contacts the fixed conductive sheet 2 (584), a closed circuit is formed with the alarm (511).

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