Electric meter box

Abstract

The utility model provides an electric meter box which comprises an outer shell 1 and a terminal seat 2, the outer shell 1 is provided with an operation hole 11 for a user tool to pass through, and the electric meter box further comprises an insertion piece 3. A slot 12 is formed in the outer shell 1; the insertion sheet 3 is in sliding connection with the outer shell 1 through the insertion slot 12; the insertion piece 3 is provided with a blocking plate 31 used for adjusting the area of the operation hole 11 in the sliding process. A one-way limiting device 4 used for limiting one-way advancing of the inserting piece 3 is arranged between the inserting piece 3 and the outer shell 1. According to the utility model, under the condition that normal installation and debugging of the ammeter are not influenced, an electricity stealer cannot obtain a tool operation space, and electricity stealing behaviors are avoided. And meanwhile, violent electricity stealing can be found more easily, so that the electric meter can be maintained and repaired more timely. Due to the fact that the low-cost one-way limiting device and the low-cost inserting piece are used, the use of a high-cost lock or an electricity larceny prevention device is avoided, and the production cost and the operation cost are greatly reduced.

Description

Technical Field

[0001] The utility model relates to instrument technology, in particular to an electric meter box. Background Art

[0002] An electric meter is an instrument used to measure electric energy, also known as a watt-hour meter, a kilowatt-hour meter, or a meter for measuring various electrical quantities. In order to prevent the electric meter from being damaged during daily use and improve the safety of using the electric meter, an electric meter box is often provided, and the electric meter is installed in the inner cavity of the electric meter box.

[0003] The electric meter needs to be connected to a cable, and the cable needs to be connected to the outside of the box through the electric meter box. The electric meter box cannot be made completely enclosed. Moreover, when the electric meter is initially installed, in order to connect and debug the wires, power engineers often need a certain working operation space, and this operation space cannot be satisfied only by opening a through-hole for the cable to pass through on the box body. Therefore, the electric meter box often adopts an open-door design.

[0004] For example, a Chinese patent document with the publication number CN212085592U discloses an electric meter box, which adopts the above-mentioned open-door design. It includes a box body and a box door rotatably connected thereto. When the electric meter is initially installed, the box door is opened, and the open space provides a working operation space for power engineers; after installation, only the box door needs to be closed, and the wires are connected to the outside of the box through the wire passing holes at other positions. In order to prevent electricity theft, an installation lock is provided, and the installation lock is used to lock the box door relative to the box body.

[0005] However, this technical solution has certain technical defects: in actual use, due to cost considerations, the installation lock often adopts a relatively ordinary mechanical lock. The anti-theft function of this mechanical lock is not strong, and it is easy to be opened by a special unlocking tool, or even replaced by a mechanical lock with a similar appearance purchased by the electricity thief. It is very difficult for the inspection personnel to observe only through the appearance that the mechanical lock has been replaced, so that this electricity theft behavior has a certain degree of concealment, affecting the electricity use safety and causing economic losses to the power operation. Further, if this behavior is to be eliminated, the power operation unit needs to configure a higher-specification lock, resulting in an increase in production and operation costs. Summary of the Utility Model

[0006] In view of the above-mentioned defects of the prior art, the utility model provides an electric meter box, which can continue to reserve enough tool operation space during the initial installation of the electric meter. After installation, the tool operation space is cancelled to prevent electricity theft behavior, and the entire technical solution has a simple structure and is easy to implement, thus avoiding an increase in the production and operation costs of the power operation unit.

[0007] To achieve the above object, the technical solution adopted by the utility model is:

[0008] An electricity meter box includes a housing 1 and a terminal block 2. An operation hole 11 for a user's tool to pass through is provided on the housing 1. The electricity meter box further includes an insertion piece 3. A slot 12 is formed on the housing 1. The insertion piece 3 is slidably connected to the housing 1 through the slot 12. A blocking plate 31 for adjusting the hole area of the operation hole 11 during the sliding process is provided on the insertion piece 3. A one-way limiting device 4 for restricting the one-way movement of the insertion piece 3 is provided between the insertion piece 3 and the housing 1.

[0009] The entire housing 1 is an ordinary housing without the need to set up a flip door, and it only needs to be externally buckled on the outside of the electricity meter. The terminal block 2 is provided with wiring terminals for realizing the internal connection and external connection of the cable. The internal part of the cable is connected to the electricity meter, and the external connection is connected to the outside of the housing 1 through the operation hole 11. When an electrical engineer initially installs the electricity meter, the blocking plate 31 on the insertion piece 3 does not block the operation hole 11, and the entire area of the operation hole 11 is in a fully open state. The tools of the electrical engineer can smoothly pass through the operation hole 11 to operate the electricity meter and the cable. After the installation is completed, the electrical engineer only needs to push the insertion piece 3 forward. During the pushing process, the blocking plate 31 on the insertion piece 3 starts to block the operation hole 11, thereby reducing the hole area of the operation hole 11. For example, 60% of the area is reduced. At this time, only 40% of the remaining hole area can allow the cable to pass through, but the tool cannot pass through, thus preventing the change of cable connection and the change of electricity meter settings, and preventing the occurrence of electricity theft behavior. Due to the existence of the one-way limiting device 4, the insertion piece 3 can only move forward and cannot move backward. Therefore, unless the insertion piece 3 is violently damaged, the reduction of the hole area is irreversible.

[0010] In summary, first, due to the setting of the operation hole 11, the electrical engineer can normally operate and debug the wires and the electricity meter during the initial installation. Second, by setting the insertion piece 3 that moves in one direction, the electricity thief cannot obtain the tool operation space, avoiding the occurrence of electricity theft behavior. Third, if you want to crack it, the electricity thief can only do it by destroying the insertion piece 3. If the insertion piece 3 is damaged, it can be relatively easily observed by the electricity meter inspector, making the electricity theft behavior not concealable. Fourth, high-specification and high-cost locks are not used throughout the process, thus avoiding the increase in operating costs.

[0011] Preferably, the one-way limiting device 4 includes an elastic strip 41 provided on the insertion piece 3 and an insertion bar 43 located on the housing 1. There is an inner groove 42 between the elastic strip 41 and the insertion piece 3 for the elastic strip 41 to deform inward.

[0012] The elastic strip 41 is provided on the insertion piece 3 and has a certain elasticity. The insertion bar 43 is provided on the outer housing 1. When the insertion piece 3 advances, the outer surface of the insertion bar 43 abuts against the elastic strip 41, and the elastic strip 41 contracts inward due to elastic deformation, that is, it contracts into the inner groove 42, and the insertion piece 3 advances smoothly. After the elastic strip 41 completely passes by the insertion bar 43, the elastic strip 41 rebounds. At this time, if the insertion piece 3 is to be moved backward, the end of the elastic strip 41 abuts against the insertion bar 43, which functions to prevent the insertion piece 3 from retracting.

[0013] Preferably, the one-way limiting device 4 includes a fixed ball 44 provided on the outer housing 1 and a fixed notch 45 provided on the insertion piece 3; in the moving direction of the insertion piece 3, the rear side of the fixed notch 45 is an inclined surface and the front side is a vertical surface, and the fixed ball 44 is adapted to the fixed notch 45.

[0014] The fixed balls 44 are generally used to fix the pull rod when it extends to a certain length to prevent it from retracting or continuing to extend. The fixed balls 44 are elastic, which enables them to remain contracted when abutting against the side surface of the insertion piece 3 during the advancement of the insertion piece 3. When the insertion piece 3 advances to a specified position, the fixed balls 44 are aligned with the fixed notch 45 and automatically pop out, and the fixed balls 44 fall into the fixed notch 45. Since the front sides of the fixed balls 44 and the fixed notch 45 are vertical surfaces, if the insertion piece 3 is pulled backward, the two vertical surfaces abut against each other, and the insertion piece 3 cannot move backward, thus preventing the insertion piece 3 from retracting. When the insertion piece 3 is pushed forward continuously, the rear sides of the fixed balls 44 and the fixed notch 45 are inclined surfaces, and the two inclined surfaces are mutually extruded. The fixed balls 44 contract due to elasticity, and the insertion piece 3 can continue to advance.

[0015] Preferably, the number of the operation holes 11 is multiple; through holes 32 having the same number as the operation holes 11 are provided on the insertion piece 3.

[0016] The multiple operation holes 11 can expand the operation space and more conveniently control multiple wiring terminals. The intervals between the multiple through holes 32 function as a blocking plate 31. When the through holes 32 are misaligned with the operation holes 11, the operation holes 11 are covered by the intervals between the through holes 32, and the hole area becomes smaller.

[0017] Preferably, the through holes 32 have the same size as the operation holes 11.

[0018] The advantage of this is to maximize the utilization of the hole area of the operation holes 11. If the size of the through holes 32 is smaller than that of the operation holes 11, when the operation holes 11 are in a fully open state, the operation space is the hole area of the through holes 32; if the size of the through holes 32 is larger than that of the operation holes 11, it may cause the intervals between the through holes 32 to fail to completely cover or cover a large area of the operation holes 11, resulting in the electricity stealers obtaining an operation space.

[0019] Preferably, a blocking post 33 is provided at the end of the insertion piece 3 for abutting against the outer surface of the outer shell 1 to limit the maximum forward distance of the insertion piece 3.

[0020] After installation, during the process of pushing the insertion piece 3 forward, it is possible that the engineer applies excessive force, resulting in damage to the one-way limiting device 4 or the insertion piece 3. The function of the blocking post 33 is to visualize the process of pushing the insertion piece 3 forward, enabling the installer to observe in a timely manner that the insertion piece 3 has slid to the designated position and avoiding continued application of external force to damage the one-way limiting device 4 or the insertion piece 3. The blocking post 33 can be a component such as a bolt or a protrusion with a blocking function.

[0021] Preferably, a sealed inner shell 5 is provided inside the outer shell 1 for placing the electric meter.

[0022] The well-protected sealed inner shell 5 effectively isolates influencing factors such as air and dust, reducing the risk of damage to the electric meter and shortening of its service life.

[0023] Preferably, a wiring hole 13 with a smaller aperture than the operation hole 11 is provided on the side of the outer shell 1.

[0024] The advantage of this is that the cable of the electric meter can pass through the wiring hole 13 on the side without passing through the operation hole 11. The blocking plate 31 can completely cover the operation hole 11, and the hole area of the wiring hole 13 only allows the cable to pass through without operation space, achieving dust prevention and anti-theft electricity at the same time.

[0025] Preferably, a control hole 14 is provided on the outer shell 1 for passing the electric meter control button.

[0026] The electric meter control button is used for functions such as testing, starting, and resetting the electric meter after installation. After the electric meter cable is successfully installed, the installer can operate the electric meter through the electric meter control button extending out of the control hole 14. The advantage of this is that the electric meter box of the present utility model can be adapted to more types of multifunctional electric meters, not just basic models.

[0027] Preferably, a fixing clip 15 for fixing the electric meter or fixing electric meter accessories is provided inside the outer shell 1.

[0028] After the space of the electric meter box accommodates the electric meter and its related accessories, there will be a certain amount of surplus space. Using the fixing device 15 to fix the electric meter and its related accessories can prevent the electric meter from being damaged and misaligned due to shaking or external force pulling during installation or transportation.

[0029] Compared with the prior art, the beneficial effects of the present utility model are reflected in:

[0030] 1. Because of the adoption of the one-way limiting device and the insert piece, without affecting the normal installation and debugging of the electricity meter, the electricity thief cannot obtain the tool operation space, avoiding the occurrence of electricity theft behavior. At the same time, it is easier to detect violent electricity theft, making the maintenance and repair of the electricity meter more timely.

[0031] 2. Because of the use of low-cost one-way limiting device and insert piece, the use of high-cost locks or anti-electricity-theft devices is avoided, resulting in a significant reduction in production costs and operating costs.

[0032] 3. Since a sealed inner housing is provided for placing the electricity meter, the electricity meter can be effectively protected, preventing the electricity meter from contacting the external environment and increasing the service life of the electricity meter.

[0033] 4. Multiple operation holes can effectively expand the operation space for the staff and improve work efficiency.

[0034] 5. The advantage of adopting the method of staggering and blocking the operation holes and through holes is that it saves consumables more; furthermore, using the same number of operation holes and through holes can maximize the use of the hole area of the operation holes and avoid waste of the operation hole space caused by the through hole being smaller than the operation hole.

[0035] 6. The setting of the blocking column enables the installer to observe in time whether the insert piece slides to the designated position, avoiding damage to the insert piece caused by the installer applying excessive force.

[0036] 7. The meter box is provided with wiring holes with apertures smaller than the operation holes, and the cable of the electricity meter can pass through the wiring holes. Therefore, the blocking plate does not need to leave a gap for the cable to pass through, and dust prevention and electricity theft prevention can be achieved simultaneously.

[0037] 8. Fixed clamping strips are provided in the meter box, and the electricity meter and components will not shake, and the positioning is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the front view of Embodiment 1;

[0039] Figure 2 is the upper sectional view of Embodiment 1;

[0040] Figure 3 is the side view of Embodiment 1;

[0041] Figure 4 is the internal schematic diagram of the outer housing in Embodiment 1;

[0042] Figure 5 is the structural schematic diagram of the insert bar in Embodiment 1;

[0043] Figure 6 is the structural schematic diagram of the one-way limiting device in Embodiment 2.

[0044] Wherein:

[0045] 1 - Outer housing; 11 - Operation hole; 12 - Slot; 13 - Wiring hole; 14 - Control hole; 15 - Fixed clamping strip; 2 - Terminal block; 3 - Insert piece; 31 - Blocking plate; 32 - Through hole; 33 - Blocking column; 4 - One - way limiting device; 41 - Elastic strip; 42 - Inner groove; 43 - Insert bar; 44 - Fixed ball; 441 - Second inclined surface; 45 - Fixed notch; 451 - Third inclined surface; 46 - First inclined surface; 5 - Inner housing. Detailed implementation mode

[0046] In order to make the technical means, creative features, achieved purposes and effects realized by the utility model easy to understand, the present utility model is further elaborated below in conjunction with specific drawings. However, the present utility model is not limited to the following implemented cases.

[0047] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model.

[0048] Embodiment 1:

[0049] As Figures 1-5 shown, an electric meter box includes an outer housing 1 and a terminal block 2. The outer housing 1 is an ordinary housing, which only needs to be externally buckled on the outside of the electric meter during use. The terminal block 2 is provided with wiring terminals for realizing the internal connection and external connection of the cable. The outer housing 1 is provided with an operation hole 11 for the user's tool to pass through. The internal connection of the cable is connected to the electric meter, and the external connection is connected to the outside of the outer housing 1 through the operation hole 11.

[0050] This electric meter box further includes an insert piece 3; the insert piece 3 is slidably connected to the outer housing 1 through a slot 12 opened on the outer housing 1; the insert piece 3 is provided with a blocking plate 31 for adjusting the hole area of the operation hole 11 during the sliding process; a one - way limiting device 4 for restricting the one - way movement of the insert piece 3 is provided between the insert piece 3 and the outer housing 1. During use, the tools of the electrical engineer can smoothly pass through the operation hole 11 to operate the electric meter and the cable. After installation, when the insert piece 3 is pushed forward, during the pushing process, the blocking plate 31 on the insert piece 3 starts to block the operation hole 11, thereby reducing the hole area of the operation hole 11 until the remaining hole area can only allow the cable to pass through and cannot allow the tool to pass through, thus preventing the change of cable connection and the change of electric meter settings. The one - way limiting device 4 makes the insert piece 3 can only move forward and cannot move backward, unless the insert piece 3 is violently damaged, and the reduction of the hole area is irreversible, thereby preventing the occurrence of electricity theft behavior.

[0051] As Figure 4 and Figure 5 shown, the one-way limiting device 4 used in this embodiment includes an elastic strip 41 provided on the insertion piece 3 and an insertion strip 43 located on the outer housing 1. The elastic strip 41 is provided on the side of the insertion piece 3 and has a certain elasticity. The insertion strip 43 is provided on the inner wall of the outer housing 1. When the insertion piece 3 is pushed forward, the outer surface of the insertion strip 43 abuts against the elastic strip 41, and the elastic strip 41 contracts inward due to elastic deformation, and the insertion piece 3 advances smoothly. There is an inner groove 42 for cooperating with the insertion strip 43 in the elastic strip 41 and the insertion piece 3, and a first inclined surface 46 is provided at the opening of the inner groove 42. When the elastic strip 41 completely passes the insertion strip 43, the elastic strip 41 rebounds. At this time, if the insertion piece 3 is to be moved backward, the tip of the elastic strip 41 obstructs the insertion strip 43, performing the function of preventing the insertion piece 3 from retracting. Since the first inclined surface 46 is provided at the opening of the inner groove 42, it is convenient to slide out. When the insertion piece 3 is pushed forward continuously, the insertion strip 43 escapes and slides out of the inner groove 42 through the first inclined surface 46, and the insertion piece 3 can continue to advance forward. Thus, the elastic strip 41 enables the insertion piece 3 to be pushed forward, the tip of the elastic strip 41 and the inner groove 42 prevent the insertion piece 3 from retreating, and the first inclined surface 46 enables the insertion piece 3 to continue to advance after the insertion strip 43 falls into the inner groove 42.

[0052] The number of the operation holes 11 is multiple; through holes 32 having the same number as the operation holes 11 are provided on the insertion piece 3. In this embodiment, the number of the wiring terminals is 4, and the number of the operation holes 11 and the through holes 32 is the same as that of the wiring terminals, so that the operation space can be maximized and it is more convenient to control multiple wiring terminals. During use, the interval between the through holes 32 functions as a blocking plate 31. When the insertion strip 3 is pushed, the through holes 32 are displaced from the operation holes 11, and the operation holes 11 are covered by the interval between the through holes 32, and the hole area becomes smaller, being insufficient to operate the wiring terminals for stealing electricity anymore.

[0053] Preferably, the through holes 32 and the operation holes 11 have the same size. During use, the through holes 32 and the operation holes 11 coincide, and the hole area is the largest. Therefore, the operation holes 11 can be utilized to the maximum extent for operation and installation.

[0054] A blocking post 33 is provided at the end of the insertion piece 3 for abutting against the outer surface of the housing 1 to limit the maximum forward distance of the insertion piece 3. In this embodiment, the blocking post 33 is a bolt provided at the end of the insertion piece 3. When the insertion piece 3 is pushed forward until the insertion strip 43 is inserted into the inner groove 42, the bolt just abuts against the side surface of the outer housing 1. This enables the staff to observe in time that the operation holes 11 have been closed properly and no external force can be applied continuously.

[0055] A sealed inner shell 5 is provided inside the outer shell 1. The electric meter is placed in the sealed inner shell 5 to isolate air and dust. A hole should be provided on the side of the inner shell 5 so that the cables inside the electric meter can reach the terminal block and connect to the wiring terminal. At the same time, a sealing material should be used between the hole and the cable to ensure the sealing of the inner shell 5. This embodiment uses a sealing ring. In actual use, other sealing materials can be selected according to actual conditions.

[0056] The side of the outer shell 1 is provided with a wiring hole with a smaller diameter than the operation hole 11. The external cable of the electric meter can pass through the operation hole 11 or the wiring hole 13. In this embodiment, the cable passes through the wiring hole 13. The blocking plate 31 can completely cover the operation hole 11. The hole area of the wiring hole 13 can only allow the cable to pass through, leaving no operating space, and at the same time, dust and electricity theft prevention are achieved.

[0057] The outer shell 1 is provided with a control hole 14 for passing the meter control button. Before installing the meter, the staff can reset the meter by extending the meter reset button through the control hole 14. After successful installation, the meter can be tested and turned on by the test and switch buttons. The number of control holes 14 is the same as the number of buttons set on the meter. In actual production, meter boxes with different numbers of control holes 14 can be produced in conjunction with different models of meters. This embodiment uses a meter box with two control holes 14, which can support meters with two control buttons.

[0058] A fixing clip 15 for fixing the electric meter or the accessories of the electric meter is arranged inside the outer shell 1, so as to prevent the electric meter from shaking and colliding in the outer shell 1 during transportation and use.

[0059] Embodiment 2:

[0060] The difference between this embodiment and embodiment 1 is that the specific implementation of the one-way limit device 4 is different. Figure 6 As shown, in this embodiment, the one-way limit device 4 includes a fixed pin 44 provided on the outer shell 1 and a fixed notch 45 provided on the plug 3. When the plug 3 moves forward, the fixed pin 44 contacts the side of the plug 3. Because it is elastic, the fixed pin 44 remains contracted to allow the plug 3 to pass smoothly. When the plug 3 moves forward to the specified position, the fixed pin 44 is aligned with the fixed notch 45, and the fixed pin 44 automatically pops out and falls into the fixed notch 45. The front sides of the fixed pin 44 and the fixed notch 45 are both vertical surfaces, the rear side of the fixed pin 44 is the second inclined surface 441, and the rear side of the fixed notch 45 is the third inclined surface 451. Since the front sides of the fixed pin 44 and the fixed notch 45 are vertical surfaces, if the plug 3 is pulled backward, the two vertical surfaces contact each other, and the plug 3 cannot move backward, thereby preventing the plug 3 from retreating. The insert 3 is continuously pushed forward, and the third inclined surface 451 squeezes the second inclined surface 441 . The fixed pin 44 is elastic and contracts after being squeezed, so that the insert 3 can continue to move forward.

Claims

1. An electric meter box, comprising a housing (1) and a terminal block (2), characterized in that, An operation hole (11) through which a user tool can pass is provided on the outer housing (1). The electricity meter box further includes an insertion piece (3). A slot (12) is formed on the outer housing (1). The insertion piece (3) is slidably connected to the outer housing (1) through the slot (12). A blocking plate (31) for adjusting the hole area of the operation hole (11) during the sliding process is provided on the insertion piece (3). A one-way limiting device (4) for restricting the one-way movement of the insertion piece (3) is provided between the insertion piece (3) and the outer housing (1).

2. The electric meter box according to claim 1, wherein The one-way limiting device (4) includes an elastic strip (41) provided on the insertion piece (3) and an insertion bar (43) located on the outer housing (1). There is an inner groove (42) in the elastic strip (41) and the insertion piece (3) for the elastic strip (41) to deform inwardly.

3. The meter box according to claim 1, characterized in that, The one-way limiting device (4) includes a fixed ball (44) provided on the outer housing (1) and a fixed notch (45) provided on the insertion piece (3). On the moving direction of the insertion piece (3), the rear side of the fixed notch (45) is an inclined surface and the front side is a vertical surface. The fixed ball (44) is adapted to the fixed notch (45).

4. The electric meter box according to claim 2 or 3, characterized in that, The number of the operation holes (11) is multiple. Through holes (32) having the same number as the operation holes (11) are provided on the insertion piece (3).

5. The meter box according to claim 4, characterized in that, The through holes (32) have the same size as the operation holes (11).

6. The meter box according to claim 1, characterized in that, A blocking post (33) is provided at the end of the insertion piece (3) for abutting against the outer surface of the outer housing (1) to limit the maximum forward distance of the insertion piece (3).

7. The meter box according to claim 1, characterized in that, An inner housing (5) for placing the electricity meter is provided inside the outer housing (1).

8. The meter box according to claim 1, characterized in that, A wiring hole (13) having a diameter smaller than that of the operation hole (11) is provided on the side surface of the outer housing (1).

9. The meter box according to claim 1, characterized in that, A control hole (14) for passing an electricity meter control button is provided on the outer housing (1).

10. The meter box according to claim 9, characterized in that, Fixing card strips (15) for fixing the electricity meter or electricity meter accessories are provided inside the outer housing (1).

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