Box group type metering box based on long glass fiber reinforced polypropylene material

Abstract

The invention discloses a box group type metering box based on a long glass fiber reinforced polypropylene material, and relates to the technical field of power equipment. Comprising a box body; the plurality of protection units are arranged in the box body, each protection unit comprises a ball joint body, the ball joint body is in ball joint with the box body, the ball joint body is in sliding connection with a sliding cylinder, and the sliding cylinder is detachably connected with a clamping ring; and the two sliding frames are fixedly connected to the box body, the sliding frames are provided with hammering blocks, and the hammering blocks and the clamping rings are jointly and fixedly connected with elastic ropes. The cable is fixed through the sliding cylinder, and the part of the cable in the box body is kept in a loose state, so that when the cable is pulled, the influence on the joint of the cable and elements in the box body is reduced, the probability of occurrence of fire disasters, personnel electric shock and the like is reduced, and meanwhile, the pulling force of the cable is consumed by the elastic force of the elastic rope; and the probability that the cable is damaged due to hard pulling and the metering box topples over is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and particularly relates to a box-type metering box based on long glass fiber reinforced polypropylene material. Background Art

[0002] As an indispensable part of the power system, the core function of the box-type metering box is to accurately measure electric energy, provide detailed and accurate electricity consumption data for users and management departments, and control the on-off of the circuit through the disconnect switch inside it; during the use of the metering box, to ensure the normal operation of the metering box, it is necessary to ensure the reliable connection between the external cable and the relevant components inside the metering box. The existing temporary metering boxes used at the construction site are usually temporarily fixed with brackets during use, and the externally connected cables are directly spread on the ground. When workers move or construction machinery moves, the cables will be pulled, resulting in pulling at the connection between the cable and the relevant components inside the metering box. The existing electrical component terminal blocks usually form an electrical connection with the cable by means of bolt pressing. This connection method causes the cable to slide or even come out of the terminal block when the cable is pulled. If relative sliding occurs between the cable and the terminal block, the contact area and extrusion force between the cable and the terminal block are both reduced, resulting in an increase in the resistance at the connection between the cable and the terminal block, thereby increasing the heat generation and even causing a fire. If the cable comes out of the terminal block, it not only affects the normal progress of the construction, but also increases the probability of electric shock for users as the cable is directly exposed to the outside. Summary of the Invention

[0003] The present invention provides a box-type metering box based on long glass fiber reinforced polypropylene material to overcome the disadvantages that the existing temporary metering boxes used at the construction site have cables being pulled during use, resulting in relative sliding or even loss of contact between the cables and the terminal blocks of the relevant components, causing an increase in resistance and an increase in the probability of electric shock.

[0004] The technical implementation plan of the present invention is as follows: A box-type metering box based on long glass fiber reinforced polypropylene material, comprising: A box body; A plurality of protection units, all arranged inside the box body, used to protect the cables connected inside the box body when the cables are pulled. The protection unit includes: A ball joint body, ball-jointed to the box body. The ball joint body is slidably connected through a sliding cylinder. A first fastening knob is threadedly connected to one side of the sliding cylinder outside the box body. The first fastening knob is used to clamp the cable by the sliding cylinder. A clamping ring is detachably connected to one side of the sliding cylinder inside the box body. The ball joint body restricts the movement range of the sliding cylinder through the clamping ring and the first fastening knob; Two sliding frames, both fixedly connected to the box body. A hammering block is jointly arranged on the two sliding frames. The hammering block is provided with a rectangular hole for the cable to pass through. An elastic rope is fixedly connected to the hammering block and the clamping ring. A support assembly is arranged on the sliding frame and is used to keep the connection between the cable and the components inside the box body stationary.

[0005] Furthermore, an arc-shaped elastic piece is fixedly connected between the ball joint and the box body, and the arc-shaped elastic piece is used to maintain the position of the ball joint.

[0006] Furthermore, an installation ring groove is arranged at a position of the sliding cylinder close to the adjacent ball joint. An elastic ring is sleeved in the installation ring groove. A limiting ring groove is arranged at a position of the ball joint close to the adjacent elastic ring, and the limiting ring groove is used to limit the adjacent elastic ring.

[0007] Furthermore, a ring-shaped reset inclined surface is arranged at a position of the ball joint close to the elastic ring. The maximum diameter of the ring-shaped reset inclined surface is larger than the maximum outer diameter of the elastic ring, and the ring-shaped reset inclined surface is used to guide the elastic ring into the adjacent limiting ring groove.

[0008] Furthermore, the support assembly includes: A fixing frame is slidably connected to two adjacent sliding frames. The fixing frame is provided with a through hole for the cable to pass through. The fixing frame is threadedly connected with a second fastening knob, and the second fastening knob is used to clamp the cable by the fixing frame.

[0009] Furthermore, two elastic blocks are fixedly connected inside the fixing frame. Positioning grooves are arranged on the opposite sides of the two sliding frames, and the positioning grooves are used to limit the adjacent elastic blocks to keep the height of the fixing frame unchanged.

[0010] Furthermore, it also includes: Disconnection assemblies with the same quantity as the protection units are respectively arranged on adjacent sliding frames. The disconnection assemblies are used to judge the connection state between the cable and the components inside the box body, and disconnect the cable from the relevant components inside the box body when the cable is in poor contact with the components inside the box body. The disconnection assemblies include: An L-shaped block is slidably connected to the adjacent sliding frame in a limited way. The sliding frame is slidably connected to the adjacent hammering block. A limiting piece is fixedly connected to one side of the L-shaped block close to the hammering block, and the limiting piece is used to support the hammering block to keep the height of the hammering block unchanged. An extrusion part is arranged on one side of the limiting piece close to the adjacent fixing frame, and the fixing frame pushes the adjacent limiting piece to move through the adjacent extrusion part. A tension spring is fixedly connected between the L-shaped block and the adjacent sliding frame.

[0011] Furthermore, in the sliding direction of the hammering block, there is a distance between the hammering block and the adjacent fixing frame.

[0012] Furthermore, sliding grooves are provided on the facing sides of the two sliding frames, and the depth of the sliding grooves is greater than the depth of the positioning grooves.

[0013] Furthermore, a one-way elastic block is fixedly connected inside the ball joint near the sliding cylinder, and the sliding cylinder is provided with a locking ring groove. The one-way elastic block is used to limit the sliding cylinder through the locking ring groove.

[0014] The present invention has at least the following beneficial effects: The present invention fixes the cable through the sliding cylinder and makes the part of the cable inside the box body remain in a relaxed state. Then, when the cable is pulled, the influence on the connection part between the cable and the components inside the box body is reduced, the connection state between the cable and the components inside the box body is maintained, the probability of situations such as fire and electric shock to personnel is reduced. At the same time, relying on the elastic force of the elastic rope to consume the pulling force of the cable, the probability of damage to the cable due to hard pulling and the probability of the metering box tipping over are reduced; at the same time, the ball joint connection method is adopted between the sliding cylinder and the box body, so that when the cable is pulled, the horizontal component force of the cable on the box body is reduced, and the probability of the box body tipping over is reduced.

[0015] When the pulling force of the cable on the sliding cylinder is small (for example, the cable shakes due to wind force and pulls the sliding cylinder), the sliding cylinder can be kept stationary by relying on the limiting effect of the elastic ring on the sliding cylinder, reducing the deformation of the part of the cable inside the box body and the number of times the sliding cylinder and the ball joint slide, prolonging the service life of the ball joint, the sliding cylinder and the cable, and being beneficial to maintaining the stable electrical connection between the cable and the components.

[0016] The fixing frame is used to fix the connection position between the cable and the components. While the sliding cylinder moves up and down to consume the pulling force of the cable, the static state of the connection part between the cable and the components is maintained, reducing the probability that the connection part between the cable and the components becomes loose due to being pulled, and thus maintaining the good contact state between the cable and the components.

[0017] The connection state between the cable and the components inside the box body is inferred based on the position of the fixing frame. When the contact between the cable and the components inside the box body is poor, the cable is automatically disconnected from the components inside the box body, reducing the probability of poor contact and fire due to the cable being pulled, and protecting other components inside the box body.

[0018] By using the limiting effect of the locking ring groove on the one-way elastic block, after the cable is disconnected from the components, there is a distance between the end of the cable and the components, reducing the probability of poor contact between the cable and the components. At the same time, it prevents the end of the cable from detaching from the metering box, and thus prevents the problem of increased electric shock probability caused by the direct exposure of the end of the cable. Description of the Drawings

[0019] Figure 1 is a schematic three-dimensional structure diagram of the present invention; Figure 2 is a schematic three-dimensional structure diagram of the box body and the sliding rack of the present invention; Figure 3 is a schematic three-dimensional structure diagram of the hammering block and the fixing rack of the present invention; Figure 4 is a schematic three-dimensional structure diagram of the sliding cylinder and the clamping ring of the present invention; Figure 5 is a schematic cross-sectional view of the three-dimensional structure of the sliding rack and the fixing rack of the present invention; Figure 6 is an enlarged view of the attachment Figure 5 at position A in the present invention; Figure 7 is a schematic three-dimensional structure diagram of the sliding rack and the elastic block of the present invention; Figure 8 is an attachment of the present invention Figure 5 is an enlarged view at position B in the present invention.

[0020] The markings of each component in the attached drawings are as follows: 1 - box body, 101 - ball joint, 102 - arc-shaped elastic piece, 2 - sliding cylinder, 201 - installation ring groove, 3 - first fastening knob, 4 - clamping ring, 5 - sliding rack, 6 - hammering block, 7 - elastic rope, 8 - elastic ring, 801 - limit ring groove, 802 - annular reset inclined plane, 9 - fixing rack, 10 - second fastening knob, 11 - elastic block, 111 - positioning groove, 112 - sliding groove, 12 - L-shaped block, 13 - limiting member, 131 - extrusion part, 14 - tension spring, 15 - one-way elastic block, 151 - locking ring groove. Detailed implementation manners

[0021] Other features and advantages of the present invention will be described in the subsequent specification, and part of them will be obvious from the specification or understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the attached drawings.

[0022] A box-type metering box based on long glass fiber reinforced polypropylene material, please refer to Figures 1 - 5, including: a box body 1; several protection units, all arranged inside the box body 1 and used to protect the cables connected inside the box body 1 when the cables are pulled. The protection unit includes: a ball joint body 101, ball-jointed to the box body 1, a sliding cylinder 2 is connected to the ball joint body 101 in a penetrating and sliding manner. A first fastening knob 3 that contacts the ball joint body 101 is threadedly connected to one side of the sliding cylinder 2 outside the box body 1. The first fastening knob 3 is used to clamp the cable by the sliding cylinder 2. A clamping ring 4 is detachably connected to one side of the sliding cylinder 2 inside the box body 1. The ball joint body 101 restricts the movement range of the sliding cylinder 2 through the clamping ring 4 and the first fastening knob 3; two sliding frames 5 are both fixedly connected to the position of the box body 1 close to the sliding cylinder 2. A hammering block 6 is jointly arranged on the two sliding frames 5. The hammering block 6 is provided with a rectangular hole for the cable to pass through. An elastic cord 7 is fixedly connected to the hammering block 6 and the clamping ring 4 together; a support assembly is arranged on the sliding frame 5 and used to restrict the position of the cable so that the connection between the cable and the components inside the box body 1 remains stationary; an arc-shaped elastic piece 102 is fixedly connected between the ball joint body 101 and the box body 1, and the arc-shaped elastic piece 102 is used to maintain the position of the ball joint body 101.

[0023] In the above solution, it aims to solve the problem that the cables of the temporary metering boxes used at the existing construction sites are pulled during use, resulting in the relative sliding or even loss of contact of the connection terminals of the cables with related components, causing an increase in resistance and an increase in the probability of electric shock. In this solution, the cable is fixed by the sliding cylinder 2, and the part of the cable inside the box body 1 is kept in a relaxed state. Then, when the cable is pulled, the influence on the connection between the cable and the components inside the box body 1 is reduced, the connection state between the cable and the components inside the box body 1 is maintained, and the probability of situations such as fire and electric shock to personnel is reduced. At the same time, the pulling force of the cable is consumed by the elastic force of the elastic cord 7, so as to reduce the probability of damage to the cable due to hard pulling and the tipping of the metering box; the number of protection units is determined according to the number of cables required to be externally connected to the box body 1 during actual use. Here, the number of protection units is two; the lower part of the sliding cylinder 2 is made of elastic material, and the minimum inner diameter of the sliding cylinder 2 in the non-loaded state (that is, the state when the first fastening knob 3 is not installed on the sliding cylinder 2) is greater than the outer diameter of the cable; the arc-shaped elastic piece 102 is made of elastic metal material. On the one hand, it is used to keep the orientation of the sliding cylinder 2 stable when the cable is not pulled. On the other hand, when the cable is pulled, the cable pulls the sliding cylinder 2 to swing around the center of the ball of the ball joint body 101. During this process, the ball joint body 101 squeezes the arc-shaped elastic piece 102, causing the arc-shaped elastic piece 102 to deform, and the deformation of the arc-shaped elastic piece 102 is used to consume the pulling force of the cable on the sliding cylinder 2.

[0024] The clamping ring 4 and the sliding cylinder 2 can be connected by means of threads or card slots, which is an existing connection structure and will not be specifically shown in the figure; the material of the elastic rope 7 is determined according to factors such as the diameter of the cable to be fixed and the length of the hanging section. When the cable is not being pulled, the sliding cylinder 2 is in the upper limit position under the action of the elastic rope 7 (that is, the upper limit position where the sliding cylinder 2 can slide relative to the ball joint 101. In this state, the first fastening knob 3 contacts the lower side of the ball joint 101). When the cable is being pulled, the pulling force of the cable on the sliding cylinder 2 can cause the sliding cylinder 2 to stretch the elastic rope 7; the number of elastic ropes 7 can be adjusted according to the actual situation. Here, the elastic ropes 7 are four in a circular distribution to keep the sliding cylinder 2 stable in the vertical direction; here, the sliding frame 5 and the adjacent hammering block 6 can be regarded as fixedly connected; when the device is not installed, the first fastening knob 3 and the clamping ring 4 are not installed at the corresponding positions of the sliding cylinder 2, and the second fastening knob 10 is not installed at the through hole of the fixing frame 9; the box body 1 is made of long glass fiber reinforced polypropylene material, making the box body 1 have high strength and rigidity, capable of withstanding greater external pressure and physical impact, reducing the risk of deformation, and at the same time making the weight of the box body 1 lighter than that of a metering box made of metal material, facilitating handling and installation; the number of arc-shaped elastic pieces 102 can be adjusted according to the actual situation. Here, the arc-shaped elastic pieces 102 are six in a circular distribution.

[0025] Please refer to Figure 5 and Figure 6 At the position where the sliding cylinder 2 is close to the adjacent ball joint 101, an installation ring groove 201 is provided. An elastic ring 8 is sleeved in the installation ring groove 201. At the position where the ball joint 101 is close to the adjacent elastic ring 8, a limit ring groove 801 is provided. The limit ring groove 801 is used to limit the adjacent elastic ring 8; at the position where the ball joint 101 is close to the elastic ring 8, an annular reset inclined surface 802 is provided. The maximum diameter of the annular reset inclined surface 802 is greater than the maximum outer diameter of the elastic ring 8. The annular reset inclined surface 802 is used to guide the elastic ring 8 into the adjacent limit ring groove 801.

[0026] In the above solution, it is aimed to make the sliding cylinder 2 remain stationary by relying on the limiting effect of the elastic ring 8 on the sliding cylinder 2 when the pulling force of the cable on the sliding cylinder 2 is small (for example, the wind causes the cable to shake and pull the sliding cylinder 2), reduce the deformation of the cable inside the box body 1 and the number of times the sliding cylinder 2 and the ball joint 101 slide, extend the service life of the ball joint 101, the sliding cylinder 2 and the cable, and is beneficial to maintaining a stable electrical connection between the cable and the components; the volume of the installation ring groove 201 is larger than the volume of the elastic ring 8. Initially, the maximum outer diameter of the elastic ring 8 is greater than the outer diameter of the sliding cylinder 2; the annular reset inclined surface 802 is used to guide the elastic ring 8 to deform and enter the installation ring groove 201 when the sliding cylinder 2 drives the elastic ring 8 to move up and reset.

[0027] Please refer to Figures 3 - 5 and Figure 7, the support assembly includes: a fixing frame 9, slidably connected to two adjacent sliding frames 5. The fixing frame 9 is provided with a through hole for the cable to pass through. The fixing frame 9 is threadedly connected with a second fastening knob 10, and the second fastening knob 10 is used to clamp the cable by the fixing frame 9. Two elastic blocks 11 are fixedly connected inside the fixing frame 9. Positioning grooves 111 are provided on the opposite sides of the two sliding frames 5. The positioning grooves 111 are used to limit the adjacent elastic blocks 11 to keep the height of the fixing frame 9 unchanged.

[0028] In the above solution, it is intended to fix the position where the cable is connected to the component by the fixing frame 9. While the sliding cylinder 2 moves up and down, the static state of the connection between the cable and the component is maintained, reducing the probability that the connection between the cable and the component becomes loose due to being pulled, and thus maintaining a good contact state between the cable and the component. The through hole of the fixing frame 9 is made of elastic material, and when the fixing frame 9 is in an unloaded state, the inner diameter of the through hole in the middle of the fixing frame 9 is larger than the outer diameter of the cable. The elastic block 11 is made of elastic metal material, so that the fixing frame 9 can be stable under the action of the elasticity and gravity of the part of the cable inside the box body 1.

[0029] The working principle of the above solution is as follows: When using this device at a construction site, first fix the box body 1 to the ground by using a bracket, and then connect the cable. The worker passes the end of the cable through the first fastening knob 3 and the sliding cylinder 2 in sequence, and passes the end of the cable through the clamping ring 4, the second fastening knob 10, the through hole of the fixing frame 9 and the rectangular hole of the hammering block 6 inside the box body 1 in sequence, and then electrically connects the cable to the terminal of the component inside the box body 1. Then the worker straightens the part of the cable inside the box body 1 and installs the second fastening knob 10 to the middle of the fixing frame 9, so that the middle of the fixing frame 9 clamps the cable. At this time, the worker connects the clamping ring 4 to the upper part of the sliding cylinder 2 and moves the sliding cylinder 2 to the lower limit position (that is, the position of the sliding cylinder 2 when the lower side of the clamping ring 4 contacts the ball joint 101). At this time, the worker installs the first fastening knob 3 to the lower part of the sliding cylinder 2, so that the lower part of the sliding cylinder 2 shrinks and fixes the cable. Then the worker moves the sliding cylinder 2 to the upper limit position (during this process, the sliding cylinder 2 drives the cable to move up, making the part of the cable between the sliding cylinder 2 and the fixing frame 9 deform and present a curved and relaxed state. The elastic ring 8 contacts the annular reset slope 802 and deforms until the elastic ring 8 crosses the annular reset slope 802 and enters the limit ring groove 801. At this time, the shape of the elastic ring 8 is restored). The worker uses the elastic rope 7 to connect the clamping ring 4 and the hammering block 6 (at this time, the first fastening knob 3 fits against the lower side of the ball joint 101), and thus the installation of the box body 1 is completed.

[0030] During the use of this device, if the part of the cable outside the box body 1 is pulled due to the movement of personnel or construction equipment, causing the cable to pull the sliding cylinder 2 downward. When the pulling force of the cable on the sliding cylinder 2 is small, the sliding cylinder 2 remains stationary under the limiting effect of the limiting ring groove 801 on the elastic ring 8. When the pulling force of the cable on the sliding cylinder 2 is large, the cable pulls the sliding cylinder 2 to swing, causing the sliding cylinder 2 to drive the ball joint body 101 to swing, deforming the arc-shaped elastic piece 102. The deformation of the arc-shaped elastic piece 102 is used to consume the pulling force of the cable on the sliding cylinder 2. At the same time, the included angle between the sliding cylinder 2 and the lower side surface of the box body 1 is reduced, thereby reducing the horizontal component force of the cable on the box body 1 when being pulled, and further reducing the probability of the box body 1 tipping over due to the cable pulling. At the same time, the cable pulls the sliding cylinder 2 to move downward (during this process, the elastic ring 8 is deformed by the extrusion of the limiting ring groove 801 and contracts into the installation ring groove 201), and stretches the elastic rope 7. Due to the elasticity of the elastic rope 7 and the change in the pulling force of the cable on the sliding cylinder 2, the sliding cylinder 2 moves up and down reciprocally, and the elastic rope 7 expands and contracts reciprocally. The elastic force when the elastic rope 7 expands and contracts is used to consume the pulling force of the cable on the sliding cylinder 2, so as to maintain a good electrical connection state between the cable and the components. After the pulling force of the cable disappears, the arc-shaped elastic piece 102 drives the ball joint body 101 to swing, resetting the ball joint body 101. At the same time, the elastic rope 7 drives the sliding cylinder 2 and the cable to move up and reset through the clamping ring 4.

[0031] Please refer to Figures 3 - 5 It also includes: disconnection components with the same quantity as the protection units, which are respectively arranged on the adjacent sliding frames 5. The disconnection components are used to determine the connection state between the cable and the components in the box body 1, and disconnect the cable from the relevant components in the box body 1 when the contact between the cable and the components in the box body 1 is poor. The disconnection components include: an L-shaped block 12, which is connected to the adjacent sliding frame 5 in a limited sliding manner. The sliding frame 5 is slidably connected to the adjacent hammering block 6. A limiting member 13 is fixedly connected to one side of the L-shaped block 12 close to the hammering block 6. The limiting member 13 is used to support the hammering block 6 to keep the height of the hammering block 6 unchanged. An extrusion part 131 is arranged on one side of the limiting member 13 close to the adjacent fixed frame 9. The fixed frame 9 pushes the adjacent limiting member 13 to move through the adjacent extrusion part 131. A tension spring 14 is fixedly connected between the L-shaped block 12 and the adjacent sliding frame 5. In the sliding direction of the hammering block 6, there is a distance between the hammering block 6 and the adjacent fixed frame 9. Slip grooves 112 are arranged on the opposite sides of the two sliding frames 5, and the depth of the slip grooves 112 is greater than the depth of the positioning grooves 111.

[0032] In the above scheme, the position of the fixing frame 9 is used to infer the connection state between the cable and the components in the box body 1. When the cable and the components in the box body 1 are in poor contact, the cable and the components in the box body 1 are automatically disconnected, thereby reducing the probability of poor contact and fire due to the cable being pulled, and protecting other components in the box body 1; the hammer block 6 is made of hard metal, so that the mass of the hammer block 6 is large, which is convenient for the hammer block 6 to pull the connection between the cable and the component through the fixing frame 9; the distance between the hammer block 6 and the adjacent fixing frame 9 in the vertical direction is used to increase the impact force of the hammer block 6 on the fixing frame 9, which is convenient for pulling the connection between the cable and the component; the existence of the sliding groove 112 is used to make the elastic block 11 detach from the positioning groove 111, and the elastic block 11 is not in contact with the adjacent sliding frame 5, thereby reducing the friction resistance when the fixing frame 9 slides along the adjacent sliding frame 5.

[0033] Please refer to Figure 4 , Figure 5 and Figure 8 A one-way spring block 15 is fixedly connected to a position near the sliding cylinder 2 in the ball joint 101 . The sliding cylinder 2 is provided with a locking ring groove 151 . The one-way spring block 15 is used to limit the sliding cylinder 2 through the locking ring groove 151 .

[0034] In the above scheme, the locking ring groove 151 is used to limit the one-way spring block 15, so that after the cable is disconnected from the component, there is a distance between the cable end and the component, thereby reducing the probability of poor contact between the cable and the component, and preventing the cable end from detaching from the metering box, thereby preventing the cable end from being directly exposed to the outside and causing an increased probability of electric shock; initially, the one-way spring block 15 is in a bent force storage state, the locking ring groove 151 is composed of an annular inclined surface and an annular horizontal surface, and the inclined surface of the one-way spring block 15 is located on the upper part of its horizontal surface, so that the sliding cylinder 2 can only move downward after moving to the critical position (that is, the position of the sliding cylinder 2 corresponding to the part of the cable between the clamping ring 4 and the fixing frame 9 is in a taut state).

[0035] The working principle of the above scheme is as follows: when installing the box body 1, repeat the above steps to complete the connection between the cable and the component and the installation of the box body 1, but the worker reduces the excess length of the cable between the clamping ring 4 and the fixing frame 9 (that is, the difference between the length of the cable after bending and the shortest distance between the clamping ring 4 and the fixing frame 9) during the above installation process, so that when the sliding cylinder 2 moves downward and the clamping ring 4 does not contact the ball connector 101, the part of the cable between the clamping ring 4 and the fixing frame 9 is in a taut state (this position is subsequently defined as the critical position of the sliding cylinder 2), and at this time, the clamping ring 4 can continue to move downward and finally fit with the ball connector 101 at a distance equal to the distance between the fixing frame 9 and the middle of the extrusion portion 131 in the vertical direction.

[0036] When the cable is pulled, the cable exerts a pulling force on the sliding cylinder 2. At this time, the sliding cylinder 2 drives the clamping ring 4 to move up and down reciprocally, and reciprocally stretches the elastic rope 7. In this state, if the pulling force on the sliding cylinder 2 when the cable is pulled is small, the sliding cylinder 2 reciprocally slides up and down between the upper limit position and the critical position to consume the pulling force on the cable; if the pulling force of the cable on the sliding cylinder 2 is large, the reciprocating movement of the sliding cylinder 2 and the reciprocating deformation of the arc-shaped elastic piece 102 cannot completely consume the pulling force of the cable. Thus, to prevent the cable from being rigidly pulled with the sliding cylinder 2, resulting in damage to the cable insulation layer, and to prevent poor contact at the connection between the cable and the component, the following measures are taken: After the sliding cylinder 2 moves down to the critical position, the cable continues to pull the sliding cylinder 2 down. The sliding cylinder 2 moves down through the cable traction fixing bracket 9, and the fixing bracket 9 drives the elastic block 11 to move down, causing the elastic block 11 to deform and lose contact with the positioning groove 111, releasing the limit of the positioning groove 111 on the elastic block 11. At the same time, the fixing bracket 9 contacts the extrusion part 131 and pushes the extrusion part 131 to move. The limiting part 13 drives the L-shaped block 12 to move and stretches the tension spring 14, reducing the contact area between the limiting part 13 and the hammering block 6.

[0037] As the fixing bracket 9 moves down, when the elastic block 11 moves to correspond to the sliding groove 112, the elastic block 11 resumes its original shape under the elastic action. At the same time, the limiting part 13 completely loses contact with the hammering block 6. The hammering block 6 quickly moves down under the action of its own gravity and the elastic force of the elastic rope 7, and collides with the fixing bracket 9. Using the impact force of the collision, the fixing bracket 9 pulls the cable to quickly move down along the sliding bracket 5, disconnecting the connection between the cable and the component. Thus, when the pulling force on the cable is too large, the cable and the component are completely disconnected, preventing the situation of too high resistance or even fire caused by poor contact at the connection between the cable and the component.

[0038] When the limiting part 13 loses contact with the hammering block 6, the locking ring groove 151 corresponds to the one-way elastic block 15. At this time, the one-way elastic block 15 enters the locking ring groove 151 under its own elastic action, limiting the sliding cylinder 2 to ensure a distance between the end of the cable and the component, reducing the probability of the situation where electrical connection occurs but the resistance is too large due to their contact.

[0039] After the cable is disconnected from the component, the worker repairs the box body 1. First, the worker cuts off the power supply of the box body 1, and by rotating the first fastening knob 3 and the second fastening knob 10, releases the fixation of the cable by the sliding cylinder 2 and the fixing bracket 9, pulls out the cable from the sliding cylinder 2, and checks the insulating skin and the end of the cable. Subsequently, the clamping ring 4 is removed from the sliding cylinder 2, and the sliding cylinder 2 is moved downward until the sliding cylinder 2 is disengaged from the ball joint body 101 (during the downward movement of the sliding cylinder 2, the locking ring groove 151 loses contact with the one-way elastic block 15, and the one-way elastic block 15 is squeezed and deformed. After the sliding cylinder 2 is disengaged from the ball joint body 101, the one-way elastic block 15 deforms under its own elastic force). At this time, the one-way elastic block 15 is in a state of being not stressed. Subsequently, the worker inserts the sliding cylinder 2 downward into the ball joint body 101 again. During the process of the sliding cylinder 2 being inserted into the ball joint body 101, the sliding cylinder 2 squeezes the one-way elastic block 15 to deform and return to the initial energy storage state. At the same time, the sliding cylinder 2 drives the elastic ring 8 to move into the limit ring groove 801. Subsequently, the worker moves the fixing bracket 9 and the hammering block 6 upward respectively to reset the hammering block 6. The fixing bracket 9 drives the elastic block 11 to move. The elastic block 11 gradually moves out of the adjacent sliding groove 112 and deforms after being squeezed by the adjacent sliding bracket 5. Until the fixing bracket 9 is reset, the elastic block 11 corresponds to the adjacent positioning groove 111 and restores under its own elastic force; while the fixing bracket 9 is moving upward, the fixing bracket 9 loses contact with the extrusion part 131. The limiting part 13 and the L-shaped block 12 move and reset under the action of the adjacent tension spring 14. The limiting part 13 contacts the hammering block 6 and supports it; during the process of the hammering block 6 moving upward and resetting, the hammering block 6 drives the clamping ring 4 to move upward through the elastic rope 7. Subsequently, repeat the above installation steps to complete the repair of the box body 1.

[0040] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A box-type metering box based on long glass fiber reinforced polypropylene material, characterized in that: include: Box (1); A plurality of protection units are arranged in the box (1) and are used to protect the cables connected to the box (1) when the cables are pulled. The protection units include: A ball joint (101) is ball-jointed to the box body (1); the ball joint (101) is slidably connected to a sliding cylinder (2); a first tightening knob (3) is threadedly connected to a side of the sliding cylinder (2) located outside the box body (1); the first tightening knob (3) is used to enable the sliding cylinder (2) to clamp a cable; a clamping ring (4) is detachably connected to a side of the sliding cylinder (2) located inside the box body (1); the ball joint (101) limits the movement range of the sliding cylinder (2) through the clamping ring (4) and the first tightening knob (3); Two sliding frames (5) are both fixedly connected to the box body (1); the two sliding frames (5) are jointly provided with a hammer block (6); the hammer block (6) is provided with a rectangular hole for allowing a cable to pass through; the hammer block (6) and the clamping ring (4) are jointly fixedly connected with an elastic rope (7); A support assembly is arranged on the sliding frame (5) and is used to keep the connection between the cable and the components in the box (1) stationary.

2. A box-type metering box based on long glass fiber reinforced polypropylene material according to claim 1, characterized in that: An arc-shaped spring piece (102) is fixedly connected between the ball joint (101) and the box body (1), and the arc-shaped spring piece (102) is used to maintain the position of the ball joint (101).

3. A box-type metering box based on long glass fiber reinforced polypropylene material according to claim 2, characterized in that: The sliding cylinder (2) is provided with a mounting ring groove (201) at a position close to the adjacent ball joint (101), an elastic ring (8) is sleeved in the mounting ring groove (201), and the ball joint (101) is provided with a limiting ring groove (801) at a position close to the adjacent elastic ring (8), and the limiting ring groove (801) is used to limit the adjacent elastic ring (8).

4. A box-group type metering box based on long glass fiber reinforced polypropylene material according to claim 3, characterized in that: The ball joint (101) is provided with an annular reset slope (802) at a position close to the elastic ring (8); the maximum diameter of the annular reset slope (802) is greater than the maximum outer diameter of the elastic ring (8); the annular reset slope (802) is used to guide the elastic ring (8) into the adjacent limiting ring groove (801).

5. A box-type metering box based on long glass fiber reinforced polypropylene material according to claim 4, characterized in that: The support assembly comprises: A fixing frame (9) is slidably connected to two adjacent sliding frames (5), the fixing frame (9) being provided with a through hole for allowing the cable to pass through, the fixing frame (9) being threadedly connected to a second tightening knob (10), the second tightening knob (10) being used to enable the fixing frame (9) to clamp the cable.

6. A box-type metering box based on long glass fiber reinforced polypropylene material according to claim 5, characterized in that: Two elastic blocks (11) are fixedly connected inside the fixed frame (9), and positioning grooves (111) are provided on the opposite sides of the two sliding frames (5). The positioning grooves (111) are used to limit the positions of adjacent elastic blocks (11) to keep the height of the fixed frame (9) unchanged.

7. A box-type metering box based on long glass fiber reinforced polypropylene material according to claim 6, characterized in that include: Disconnection components, the same number as the protection units, are respectively arranged on adjacent sliding frames (5), the disconnection components are used to determine the connection status between the cable and the components in the box (1), and disconnect the cable from the relevant components in the box (1) when the cable and the components in the box (1) are in poor contact, the disconnection components comprising: The L-shaped block (12) is slidably connected to the adjacent sliding frame (5), and the sliding frame (5) is slidably connected to the adjacent hammer block (6). A limiting member (13) is fixedly connected to a side of the L-shaped block (12) close to the hammer block (6), and the limiting member (13) is used to support the hammer block (6) to keep the height of the hammer block (6) unchanged. A pressing portion (131) is provided on a side of the limiting member (13) close to the adjacent fixed frame (9), and the fixed frame (9) pushes the adjacent limiting member (13) to move through the adjacent pressing portion (131). A tension spring (14) is fixedly connected between the L-shaped block (12) and the adjacent sliding frame (5).

8. A box-type metering box based on long glass fiber reinforced polypropylene material according to claim 7, characterized in that In the sliding direction of the hammer block (6), there is a distance between the hammer block (6) and the adjacent fixing frame (9).

9. A box-type metering box based on long glass fiber reinforced polypropylene material according to claim 8, characterized in that: The two sliding frames (5) are each provided with a sliding groove (112) on the facing sides thereof, and the depth of the sliding groove (112) is greater than the depth of the positioning groove (111).

10. A box-group type metering box based on long glass fiber reinforced polypropylene material according to claim 9, characterized in that: A one-way spring block (15) is fixedly connected to a position in the ball joint (101) close to the sliding cylinder (2); the sliding cylinder (2) is provided with a locking ring groove (151); and the one-way spring block (15) is used to limit the sliding cylinder (2) via the locking ring groove (151).

Images