Three-phase multi-meter position modular combined electric energy metering box

Abstract

The application discloses a kind of three-phase multi-meter place modular combined electric energy metering box, it is related to electric power measurement and power distribution field, including box and mounting hole, the mounting hole can be detachably installed with connecting cylinder, and the connecting cylinder bottom is installed with polymeric cover, the box bottom is installed with mounting seat, and mounting seat is equipped with tightening mechanism, transmission mechanism, drive mechanism and plugging mechanism.The application is through polymeric cover cooperation multiple V-shaped frame automatic tightening structure, the gap between cable and threading hole is reduced, completely solve the large gap of transmission metering box threading hole, easy to enter mouse and snake and other small animals gnaw line, cause short circuit and fire safety hazard, substantially improve the operation safety and protection level of power distribution metering equipment, while using buffer spring pressure design, so that cable quantity, thick and thin difference, can automatically adjust extrusion degree, while not damaging insulation layer in cable tightening, adapt to complex wiring scene of multiple meter place, multiple circuit, different wire diameter, very strong universality.

Description

Technical Field

[0001] This invention relates to the field of power metering and distribution, specifically to a three-phase multi-position modular combined power metering box. Background Technology

[0002] In the field of power metering and distribution, the three-phase multi-position modular combined power metering box is the core equipment for realizing multi-user power metering, line integration and power safety protection. It is widely used in multi-circuit power consumption scenarios such as residential communities, commercial buildings and industrial plants. Internally, it is based on power electronic components such as metal oxide semiconductor field-effect transistors, insulated gate bipolar transistor chips and modules, and integrates components such as circuit breakers, metering modules and terminals, which play a key role in ensuring power safety and metering stability.

[0003] The existing three-phase multi-position modular combined energy metering box mainly consists of a box body, box cover, internal circuit breaker module, meter mounting bracket and terminal block. The bottom of the box has multiple cable passage holes for incoming and outgoing cables to pass through the box and connect to electrical components. This structure can meet the needs of multi-circuit cable entry and exit layout. The modular design also facilitates the installation and maintenance of meters and circuit breakers. It is the mainstream structural form of multi-position energy metering boxes and is widely used in power systems.

[0004] However, the cable insertion holes at the bottom of existing three-phase multi-position energy metering boxes are pre-reserved openings. After the cable is passed through the hole, a large gap will be formed between the outer wall of the cable and the wall of the hole. Through these gaps, the inside of the box will be directly connected to the external environment. During long-term use, it is very easy for animals such as rats and snakes to enter the box, gnaw on the cable insulation layer, damage the electrical component connection, and cause safety accidents such as short circuits, metering failures, or even fires. Summary of the Invention

[0005] The purpose of this invention is to provide a three-phase multi-position modular combined power metering box to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a three-phase multi-position modular combined power metering box, comprising a box body and mounting holes, wherein a connecting cylinder is detachably installed in the mounting holes, and a polymer cover is installed at the bottom of the connecting cylinder; a mounting base is installed at the bottom of the box body, and the mounting base is provided with a tightening mechanism, a transmission mechanism, a drive mechanism and a sealing mechanism; the tightening mechanism includes a V-shaped frame slidingly disposed in the mounting base, and a linkage frame and a support rod connected to each other are installed at the inner end of the V-shaped frame, and a buffer spring is sleeved on the outer wall of the support rod; The transmission mechanism includes a transmission ring and a linkage block slidably mounted on the support rod, and a drive disc rotated at the bottom of the mounting base. The transmission ring is in contact with the buffer spring, and the drive disc has a guide groove that cooperates with the linkage block for pushing the V-shaped frame to tighten the polymer cover. Both the drive disc and the mounting base have through holes for the polymer cover to pass through. The drive mechanism is used to drive the drive disc to rotate, and the sealing mechanism is used to seal the through holes in unused positions.

[0007] Preferably, the inner wall of the mounting hole and the outer wall of the connecting cylinder are provided with matching threads, and a guide ring that is attached to the inner wall of the box is installed on the top of the connecting cylinder. The diameter of the guide ring is larger than the diameter of the connecting cylinder, and the top opening of the guide ring is designed to open outward.

[0008] Preferably, the bottom diameter of the polymer cover is smaller than its top diameter, and the outer diameter of the top of the polymer cover is smaller than the outer diameter of the connecting cylinder, and the polymer cover is made of silicone rubber.

[0009] Preferably, the outer end of the V-shaped frame is equipped with an elastic strip. When in use, the elastic strip first comes into contact with the outer wall of the polymer cover, and the V-shaped frame is slidably connected to the mounting base through a support rod. Multiple V-shaped frames are provided in the mounting base, and the installation and movement positions of two adjacent V-shaped frames are staggered.

[0010] Preferably, the transmission ring is installed on multiple support rods, and the transmission ring is located at the end of the support rod away from the V-shaped frame, and the outer walls on both sides of the transmission ring are respectively in contact with the buffer spring and the inner wall of the linkage frame.

[0011] Preferably, the drive mechanism includes an electric push rod installed at the bottom of the housing, and a timing frame is installed at the end of the electric push rod. The timing frame is connected to two sides of a slide frame that is slidably installed in the bottom of the housing, and a rack is installed on the slide frame. A gear that meshes with the rack is installed at the bottom of the drive disk.

[0012] Preferably, the sealing mechanism includes an insert block installed on the outer wall of the mounting base, and the insert block has a positioning groove. An outer sealing block is slidably connected to the outer wall of the insert block. A sealing block for sealing the through hole is installed on the top of the outer sealing block. A transmission block is slidably provided inside the outer sealing block, and a positioning block located in the positioning groove is installed at the outer end of the transmission block, and a positioning spring is installed at the inner end.

[0013] Preferably, the outer corner of the top of the positioning block is designed with an arc-shaped rounded corner, and an unlocking wheel is rotatably installed on the top of the positioning block. An unlocking plate that cooperates with the unlocking wheel and a handle connected to the unlocking plate are slidably installed inside the outer sealing block.

[0014] Preferably, the positioning block and the unlocking plate are symmetrically arranged inside the outer sealing block, and the unlocking plate is connected to the handle, and the surface of the unlocking plate that contacts the unlocking wheel is an inclined surface.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the use of a polymer cover and multiple sets of V-shaped frames for automatic tightening structure, reduces the gap between the cable and the wire hole, completely solving the safety hazards of large gaps in the wire hole of traditional metering boxes, which allow small animals such as rats and snakes to enter and gnaw on the wires, causing short circuits and fires. It significantly improves the operational safety and protection level of power distribution metering equipment. At the same time, the use of a buffer spring pressure design allows the compression force to be automatically adjusted according to the number and thickness of the cables, so as not to damage the insulation layer while tightening the cables. It is suitable for complex wiring scenarios with multiple meter positions, multiple circuits and different wire diameters, and has strong versatility.

[0016] 2. This invention uses an electric actuator to drive a gear disc for synchronous transmission, enabling all V-shaped frames to retract and tighten simultaneously with a single button press. This eliminates the need for manual sealing of each hole and application of sealant, making operation simple and quick. It significantly reduces on-site wiring and maintenance workload, improving the installation efficiency of multi-meter-position metering boxes. Furthermore, the sealing mechanism quickly seals unused wiring holes, working in conjunction with the tightening and sealing structure to provide full-hole protection, preventing unused holes from becoming entry points for small animals. The sealing is more thorough and the protection more comprehensive. Moreover, this invention employs a detachable connecting cylinder and guide ring structure, making wiring smoother and installation more convenient. Sealing points can be flexibly added or removed as needed, truly achieving modular and combined configuration to meet the modification and new installation needs of different users and different numbers of meter positions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the box structure in this invention; Figure 2 This is a schematic diagram of the partially cut structure of the box body in this invention; Figure 3 This is a schematic diagram of the bottom structure of the box in this invention; Figure 4 This is a schematic diagram of the mounting base in this invention; Figure 5 This is a schematic diagram of the structure of the bottom of the housing and the mounting base after being cut open in this invention; Figure 6 This is a schematic diagram of the structure of components such as the connecting cylinder, guide ring, and tightening mechanism in this invention; Figure 7 This is a schematic diagram of the disassembled structure of the tightening mechanism, transmission ring, and linkage block in this invention; Figure 8 This is a schematic diagram of the outer sealing block in this invention; Figure 9 This is a schematic diagram of the structure of the outer sealing block after it has been cut open in this invention; Figure 10 This is a schematic diagram of the internal components of the outer sealing block in this invention.

[0018] In the diagram: 1. Housing; 2. Mounting hole; 3. Mounting base; 4. Connecting cylinder; 5. Guide ring; 6. Polymer cover; 7. Tightening mechanism; 71. V-shaped frame; 72. Elastic strip; 73. Linkage frame; 74. Support rod; 75. Buffer spring; 8. Transmission mechanism; 81. Transmission ring; 82. Linkage block; 83. Drive disc; 84. Guide groove; 9. Drive mechanism; 91. Electric push rod; 92. Synchronization frame; 93. Slide; 95. Rack; 96. Gear; 10. Through hole; 11. Sealing mechanism; 110. Insert block; 111. Positioning groove; 112. Outer sealing block; 113. Sealing block; 114. Transmission block; 115. Positioning block; 116. Positioning spring; 117. Unlocking wheel; 118. Unlocking plate; 119. Handle. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-10 The present invention provides the following technical solution: a three-phase multi-position modular combined power metering box, including a box body 1 and a mounting hole 2. A connecting cylinder 4 is detachably installed in the mounting hole 2, and a polymer cover 6 is installed at the bottom of the connecting cylinder 4. A mounting base 3 is installed at the bottom of the box body 1, and a tightening mechanism 7, a transmission mechanism 8, a drive mechanism 9 and a sealing mechanism 11 are provided on the mounting base 3. The tightening mechanism 7 includes a V-shaped frame 71 that slides in the mounting base 3, and a linkage frame 73 and a support rod 74 that are connected to each other are installed at the inner end of the V-shaped frame 71. A buffer spring 75 is sleeved on the outer wall of the support rod 74. The transmission mechanism 8 includes a transmission ring 81 and a linkage block 82 slidably mounted on the support rod 74, and a drive disc 83 rotatably mounted on the bottom of the mounting base 3. The transmission ring 81 is in contact with the buffer spring 75, and the drive disc 83 is provided with a guide groove 84 that cooperates with the linkage block 82 for pushing the V-shaped frame 71 to tighten the polymer cover 6. Both the drive disc 83 and the mounting base 3 are provided with through holes 10 for the polymer cover 6 to pass through. The drive mechanism 9 is used to drive the drive disc 83 to rotate, and the sealing mechanism 11 is used to seal the through holes 10 in unused positions.

[0021] In one embodiment of the present invention, the inner wall of the mounting hole 2 and the outer wall of the connecting cylinder 4 are provided with mutually mating threads, and a guide ring 5 that is attached to the inner wall of the housing 1 is installed on the top of the connecting cylinder 4. The diameter of the guide ring 5 is larger than the diameter of the connecting cylinder 4 to ensure the fixation of the position of the connecting cylinder 4 after it is threadedly connected to the mounting hole 2. The top opening of the guide ring 5 is designed to open outwards. During the subsequent wire threading process, the opening of the guide ring 5 will guide the cable, making it easier for the cable to pass through the guide ring 5, the connecting cylinder 4 and the polymer cover 6.

[0022] In one embodiment of the present invention, the bottom diameter of the polymer cover 6 is smaller than its top diameter, and the outer diameter of the top of the polymer cover 6 is smaller than the outer diameter of the connecting cylinder 4, and the polymer cover 6 is made of silicone rubber. During the subsequent installation of the polymer cover 6, it is convenient for the polymer cover 6 to pass through the mounting hole 2, and it is also convenient for the subsequent tightening mechanism 7 to push the polymer cover 6 to tighten the cable.

[0023] As one embodiment of the present invention, an elastic strip 72 is installed on the outer end of the V-shaped frame 71. When in use, the elastic strip 72 first comes into contact with the outer wall of the polymer cover 6, and the V-shaped frame 71 is slidably connected to the mounting base 3 through the support rod 74. Multiple V-shaped frames 71 are provided in the mounting base 3, and the installation and movement positions of two adjacent V-shaped frames 71 are staggered. During the sliding of the transmission ring 81, it will first push the buffer spring 75. Since the outer end of the V-shaped frame 71 is not blocked at this time, the sliding of the transmission ring 81 will push the V-shaped frame 71 to move towards the polymer cover 6. This will cause multiple elastic strips 72 to contact the outer wall of the polymer cover 6 first, and initially compress the outer wall of the polymer cover 6. As the V-shaped frame 71 slides further, both the elastic strips 72 and the polymer cover 6 will begin to deform until the V-shaped frame 71 begins to compress the cable passing through the polymer cover 6. While tightening the cable, the compression of the polymer cover 6 by multiple V-shaped frames 71 will reduce the gap between the polymer cover 6 and the cable, making it impossible for animals such as mice and snakes to pass through the gap between the polymer cover 6 and the cable, effectively improving safety.

[0024] In one embodiment of the present invention, the transmission ring 81 is installed on multiple support rods 74, and the transmission ring 81 is located at the end of the support rod 74 away from the V-shaped frame 71, and the outer walls on both sides of the transmission ring 81 are respectively in contact with the buffer spring 75 and the inner wall of the linkage frame 73. After the V-shaped frame 71 presses the outer wall of the polymer cover 6 to tighten the cable, if the transmission ring 81 does not slide to the predetermined position, as the transmission ring 81 continues to slide, it will start to press the buffer spring 75, causing the buffer spring 75 to contract. At the same time, the buffer spring 75 will exert a compressive force on the linkage frame 73, which will increase the compressive force of the V-shaped frame 71 on the outer wall of the polymer cover 6, further increasing the restrictive effect of the V-shaped frame 71 on the outer wall of the polymer cover 6, until the transmission ring 81 moves to the predetermined position, so that even when the number and thickness of the cables passing through the polymer cover 6 are different, the cables can be tightened smoothly.

[0025] As one embodiment of the present invention, the drive mechanism 9 includes an electric push rod 91 installed at the bottom of the housing 1, and a timing frame 92 is installed at the end of the electric push rod 91. The timing frame 92 is connected to two sides of a slide 93 that is slidably installed in the bottom of the housing 1, and a rack 95 is installed on the slide 93. A gear 96 that meshes with the rack 95 is installed at the bottom of the drive disk 83. After the electric actuator 91 is started, the synchronous frame 92 will drive the slide 93 to slide at the bottom of the housing 1, and the slide 93 will drive the rack 95 to drive the gear 96 to rotate, causing the drive disk 83 to start rotating. It will guide the linkage block 82 through the guide groove 84, causing the linkage block 82 to drive the transmission ring 81 to move towards the polymer cover 6.

[0026] In one embodiment of the present invention, the sealing mechanism 11 includes an insert block 110 installed on the outer wall of the mounting base 3, and a positioning groove 111 is provided on the insert block 110. An outer sealing block 112 is slidably connected to the outer wall of the insert block 110. A sealing block 113 for sealing the through hole 10 is installed on the top of the outer sealing block 112. A transmission block 114 is slidably provided inside the outer sealing block 112. A positioning block 115 located in the positioning groove 111 is installed at the outer end of the transmission block 114, and a positioning spring 116 is installed at the inner end. After the outer sealing block 112 is installed in place, the sealing block 113 will block the through hole 10. At the same time, the position of the positioning block 115 will correspond to the position of the positioning groove 111, and under the action of the positioning spring 116, it will enter the positioning groove 111 to restrict the position of the outer sealing block 112.

[0027] In one embodiment of the present invention, the outer corner of the top of the positioning block 115 is designed with an arc-shaped rounded corner, and an unlocking wheel 117 is rotatably mounted on the top of the positioning block 115. An unlocking plate 118 that cooperates with the unlocking wheel 117 and a handle 119 connected to the unlocking plate 118 are slidably mounted inside the outer sealing block 112. The positioning block 115 and the unlocking plate 118 are symmetrically arranged inside the outer sealing block 112, and the unlocking plates 118 are all connected to the handles 119. The surface of the unlocking plate 118 that is in contact with the unlocking wheel 117 is an inclined surface. Pulling the handle 119 will cause the unlocking plate 118 to slide toward the unlocking wheel 117, causing the inclined surface of the unlocking plate 118 to press against the unlocking wheel 117, forcing the unlocking wheel 117 to drive the positioning block 115 to slide into the outer sealing block 112, releasing the connection between the positioning block 115 and the positioning groove 111. At this time, the restriction between the outer sealing block 112 and the insert block 110 is released, and the outer sealing block 112 can be removed.

[0028] Working principle: Before using this three-phase multi-position modular combined energy metering box, it is necessary to first determine whether to install the polymer cover 6 or the sealing mechanism 11 on the mounting base 3 according to the actual installation hole 2 required. If wiring is required, the polymer cover 6 should be installed through the connecting cylinder 4. The connecting cylinder 4, which has the mounting base 3 and polymer cover 6 installed, is passed through the mounting hole 2 and threaded into the mounting hole 2, so that the polymer cover 6 moves down into the through hole 10. At this time, the outer wall of the polymer cover 6 is located between multiple V-shaped brackets 71. Where there is no need for wiring, the user needs to seal the through hole 10 using the sealing mechanism 11. Specifically, first... The outer sealing block 112 is slidably connected to the insert block 110. During the connection process, the outer end of the insert block 110 will contact the arc-shaped rounded corner of the positioning block 115, forcing the positioning block 115 to move into the outer sealing block 112. During this process, the positioning block 115 will drive the transmission block 114 to squeeze the positioning spring 116. When the outer sealing block 112 is installed in place, the sealing block 113 will block the through hole 10. At the same time, the position of the positioning block 115 will correspond to the position of the positioning groove 111, and under the action of the positioning spring 116, it will enter the positioning groove 111 to restrict the position of the outer sealing block 112. After the sealing mechanism 11 is set up, the subsequent wiring and threading work can be carried out. The cable is passed through the top opening of the guide ring 5 and the connecting cylinder 4 through the polymer cover 6, so that the cable must pass through the polymer cover 6 after exiting the box 1. After the threading is completed, the electric push rod 91 is activated, so that the synchronous frame 92 drives the slide 93 to slide at the bottom of the box 1, so that the slide 93 drives the rack 95 to drive the gear 96 to rotate, causing the drive disk 83 to start rotating. It will guide the linkage block 82 through the guide groove 84, so that the linkage block 82 drives the transmission ring 81 to move towards the polymer cover 6. During the sliding process of the transmission ring 81, it will push the buffer spring 75 first. Since the outer end of the V-shaped frame 71 is not blocked at this time, the sliding of the transmission ring 81 will push the V-shaped frame 71 to move towards the polymer cover 6. This will cause multiple elastic strips 72 to contact the outer wall of the polymer cover 6 first and initially compress the outer wall of the polymer cover 6. As the V-shaped frame 71 slides further, both the elastic strips 72 and the polymer cover 6 will begin to deform until the V-shaped frame 71 begins to compress the cable passing through the polymer cover 6. While tightening the cable, the compression of the polymer cover 6 by multiple V-shaped frames 71 will reduce the gap between the polymer cover 6 and the cable, making it impossible for animals such as mice and snakes to pass through the gap between the polymer cover 6 and the cable, thus effectively improving safety. Because the number and thickness of the cables passing through the polymer cover 6 are different, but the distance that the electric actuator 91 pushes the synchronous frame 92 to move is fixed each time it runs, after the V-shaped frame 71 squeezes the outer wall of the polymer cover 6 to tighten the cables, if the transmission ring 81 does not slide to the limited position, as the transmission ring 81 continues to slide, it will start to squeeze the buffer spring 75, causing the buffer spring 75 to start to contract. At the same time, the buffer spring 75 will give the linkage frame 73 a squeezing force, which will increase the squeezing force of the V-shaped frame 71 on the outer wall of the polymer cover 6, further increasing the restrictive effect of the V-shaped frame 71 on the outer wall of the polymer cover 6, until the transmission ring 81 moves to the limited position, so that the cables can be tightened smoothly even when the number and thickness of the cables passing through the polymer cover 6 are different. When it is necessary to remove the sealing mechanism 11 and add the polymer cover 6, pull the handle 119, which will cause the unlocking plate 118 to slide towards the unlocking wheel 117. This will cause the inclined surface of the unlocking plate 118 to squeeze the unlocking wheel 117, forcing the unlocking wheel 117 to drive the positioning block 115 to slide into the outer sealing block 112, thus releasing the connection between the positioning block 115 and the positioning groove 111. At this time, the restriction between the outer sealing block 112 and the insert block 110 is released, and the outer sealing block 112 can be removed. Then, the polymer cover 6 can be installed through the connecting cylinder 4 to complete the operation of adding the polymer cover 6.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A three-phase multi-position modular combined energy metering box, comprising a box body (1) and mounting holes (2), characterized in that: A connecting cylinder (4) is detachably installed in the mounting hole (2), and a polymer cover (6) is installed at the bottom of the connecting cylinder (4). A mounting base (3) is installed at the bottom of the box (1), and a tightening mechanism (7), a transmission mechanism (8), a drive mechanism (9) and a sealing mechanism (11) are provided on the mounting base (3). The tightening mechanism (7) includes a V-shaped frame (71) that slides in the mounting base (3), and a linkage frame (73) and a support rod (74) that are connected to each other are installed at the inner end of the V-shaped frame (71). A buffer spring (75) is sleeved on the outer wall of the support rod (74). The transmission mechanism (8) includes a transmission ring (81) and a linkage block (82) slidably mounted on the support rod (74), and a drive disc (83) rotated at the bottom of the mounting base (3). The transmission ring (81) is in contact with the buffer spring (75), and the drive disc (83) is provided with a guide groove (84) that cooperates with the linkage block (82) for pushing the V-shaped frame (71) to tighten the polymer cover (6). Both the drive disc (83) and the mounting base (3) are provided with through holes (10) for the polymer cover (6) to pass through. The drive mechanism (9) is used to drive the drive disc (83) to rotate, and the sealing mechanism (11) is used to seal the through holes (10) in unused positions.

2. The three-phase multi-position modular combined power metering box according to claim 1, characterized in that: The inner wall of the mounting hole (2) and the outer wall of the connecting cylinder (4) are provided with matching threads, and the top of the connecting cylinder (4) is fitted with a guide ring (5) that is attached to the inner wall of the box (1), and the diameter of the guide ring (5) is larger than the diameter of the connecting cylinder (4), and the top opening of the guide ring (5) is designed to open outward.

3. A three-phase multi-position modular combined power metering box according to claim 1, characterized in that: The bottom diameter of the polymer cover (6) is smaller than its top diameter, and the outer diameter of the top of the polymer cover (6) is smaller than the outer diameter of the connecting cylinder (4). The polymer cover (6) is made of silicone rubber.

4. A three-phase multi-position modular combined power metering box according to claim 1, characterized in that: The outer end of the V-shaped frame (71) is equipped with an elastic strip (72). When in use, the elastic strip (72) first comes into contact with the outer wall of the polymer cover (6), and the V-shaped frame (71) is slidably connected to the mounting base (3) through the support rod (74). Multiple V-shaped frames (71) are provided in the mounting base (3), and the installation and movement positions of two adjacent V-shaped frames (71) are staggered.

5. A three-phase multi-position modular combined energy metering box according to claim 4, characterized in that: The transmission ring (81) is installed on multiple support rods (74), and the transmission ring (81) is located at the end of the support rod (74) away from the V-shaped frame (71), and the outer walls on both sides of the transmission ring (81) are respectively attached to the inner walls of the buffer spring (75) and the linkage frame (73).

6. A three-phase multi-position modular combined energy metering box according to claim 1, characterized in that: The drive mechanism (9) includes an electric push rod (91) installed at the bottom of the housing (1), and a timing frame (92) is installed at the end of the electric push rod (91). The timing frame (92) is connected to two sides of a slide (93) that is slidably installed in the bottom of the housing (1). A rack (95) is installed on the slide (93). A gear (96) that meshes with the rack (95) is installed at the bottom of the drive disc (83).

7. A three-phase multi-position modular combined energy metering box according to claim 1, characterized in that: The sealing mechanism (11) includes an insert (110) installed on the outer wall of the mounting base (3), and a positioning groove (111) is provided on the insert (110). An outer sealing block (112) is slidably connected to the outer wall of the insert (110). A sealing block (113) for sealing the through hole (10) is installed on the top of the outer sealing block (112). A transmission block (114) is slidably provided inside the outer sealing block (112). A positioning block (115) located in the positioning groove (111) is installed at the outer end of the transmission block (114), and a positioning spring (116) is installed at the inner end.

8. A three-phase multi-position modular combined energy metering box according to claim 7, characterized in that: The outer corner of the top of the positioning block (115) is designed with an arc-shaped rounded corner, and the top of the positioning block (115) is rotatably mounted with an unlocking wheel (117). The outer sealing block (112) is slidably mounted with an unlocking plate (118) that cooperates with the unlocking wheel (117), and a handle (119) connected to the unlocking plate (118).

9. A three-phase multi-position modular combined energy metering box according to claim 8, characterized in that: The positioning block (115) and the unlocking plate (118) are symmetrically arranged inside the outer sealing block (112), and the unlocking plate (118) is connected to the handle (119). The surface of the unlocking plate (118) that is in contact with the unlocking wheel (117) is an inclined surface.

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