Power distribution cabinet under-voltage protection device convenient to disassemble and assemble

Abstract

The utility model discloses a power distribution cabinet under-voltage protection device convenient to disassemble and assemble, which comprises an under-voltage protector, and a clamping groove is formed between upper and lower protruding parts on the back surface of the under-voltage protector; the upper protruding part and the lower protruding part are respectively provided with a check block, at least the lower protruding part is internally provided with an installation hole site, a telescopic control mechanism is arranged in the installation hole site, and the check blocks are connected with the telescopic control mechanism so that the check blocks can stretch out and retract from the installation hole site. And a part of the telescopic control mechanism extends out of the mounting hole site for operation control. According to the utility model, the stop block can slide up and down, the stop block is firstly controlled to retract into the telescopic groove during installation, and the stop block is controlled to extend out of the telescopic groove to stop the installation cross beam after installation is completed, so that the under-voltage protector is prevented from falling off. And the stop block is controlled to retract into the telescopic groove, so that the installation cross beam cannot be blocked by the stop block, and the under-voltage protector can be conveniently taken down from the installation cross beam. Therefore, the under-voltage protector is convenient to mount and dismount, and the whole structure is relatively simple and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical protection products, in particular to an undervoltage protection device for a power distribution cabinet. Background Art

[0002] A power distribution cabinet is a commonly used electrical device in the power system. During use, in order to protect the components in the power distribution cabinet, an undervoltage protector needs to be installed. The main function of the undervoltage protector is to monitor the voltage in the circuit and take measures to protect the components from damage when the voltage is lower than the set threshold, preventing the components from burning out due to overload. Currently, the undervoltage protector is installed by mounting a crossbeam. The mounting crossbeam is fixed in the power distribution cabinet by bolts, and then the undervoltage protector is installed on the mounting crossbeam; the specific structure is that a slot for the crossbeam to be embedded is opened on the undervoltage protector. In order to prevent the undervoltage protector from falling off, a stop block (forming a curled edge) is fixed on the slot, and the undervoltage protector is directly embedded on the mounting crossbeam in a hard buckling manner.

[0003] During actual operation, since the position of the undervoltage protector is first determined according to the drawing, then the undervoltage protector is embedded on the crossbeam, and then the wiring is carried out. Sometimes the operator misreads the position of the undervoltage protector on the drawing and needs to replace the position of the undervoltage protector; or the undervoltage protector is purchased with the wrong inlet and outlet directions, and the undervoltage protector also needs to be disassembled and then a new undervoltage protector is replaced. Also, the undervoltage protector needs to be replaced after it is damaged during use. The existing hard buckling installation method of the undervoltage protector only forcibly removes the undervoltage protector. Due to the stability of the undervoltage protector, it is generally clamped relatively tightly. Sometimes tools are needed to pry it, the disassembly operation is inconvenient, and it is easy to damage the slot of the undervoltage protector. After reinstallation, it is not firm enough, and if it is lost, it will cause waste. Although some undervoltage protectors are designed with structures that are convenient for installation and disassembly, the structures are relatively complex, inconvenient to use, and have poor reliability. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an undervoltage protection device for a power distribution cabinet with a simpler structure, more reasonable design, reliable and practical, and convenient for installation and disassembly, aiming at the shortcomings of the prior art.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions: An under-voltage protection device for a distribution cabinet that is convenient for disassembly and assembly, including an under-voltage protector. On the upper and lower parts of the back of the under-voltage protector, there are protruding parts extending backward, and a card slot for installation is formed between the upper and lower protruding parts; on the upper protruding part, there is a downward-extending stopper, and on the lower protruding part, there is an upward-extending stopper. Its characteristics are: at least in the lower protruding part, there is an installation hole position, and a telescopic control mechanism is arranged in the installation hole position. The stopper is connected to the telescopic control mechanism to realize controllable extension from the installation hole position into the card slot or retraction from the card slot into the installation hole position; a part of the telescopic control mechanism extends outside the installation hole position for operation and control.

[0006] Further, the telescopic control mechanism includes a movable tube, the movable tube is movably connected with a connecting rod, the connecting rod is connected with the stopper, and the movable tube extends out of the installation hole position to form a structure for controlling the telescopic movement of the stopper; a limiting structure is arranged in the installation hole position, and the stopper extending out of the card slot is fixed through the limiting structure.

[0007] Further, the installation hole position includes three sections, namely a telescopic slot, a connecting hole, and a fixing hole. The telescopic slot is located inside and adjacent to the card slot, the fixing hole is located outside and adjacent to the external space, and the connecting hole is between the telescopic slot and the fixing hole; the stopper is arranged in the telescopic slot, and the connecting rod passes through the connecting hole from the telescopic slot and is movably connected with the movable tube.

[0008] Further, the width of the connecting hole is smaller than the width of the telescopic slot, the width of the fixing hole is larger than the width of the connecting hole, and the width of the baffle is larger than the width of the connecting hole.

[0009] Further, the limiting structure includes a fixing piece, a limiting piece, and a positioning piece. The fixing piece is installed in the fixing hole, and the movable tube is arranged in the accommodating hole of the fixing piece; the limiting piece is fixed on the outer wall of the movable tube, and the positioning piece is fixed on the inner wall of the movable tube; the connecting rod is inserted into the tube hole of the movable tube, and the positioning piece is movably connected with the connecting rod; the fixing piece is provided with a limiting groove and an avoidance groove capable of accommodating the limiting piece. When the limiting piece is embedded in the limiting groove, a limiting structure for the extended state of the stopper is formed, and when the limiting piece is located in the avoidance groove, a structure capable of pulling the stopper into the telescopic slot is formed; an activity cavity capable of accommodating the rotation of the limiting piece is formed between the inner end surface of the fixing hole and the fixing piece; the limiting groove is opened along the hole wall of the accommodating hole from the inner end surface of the fixing piece, and the avoidance groove is axially opened on the hole wall of the accommodating hole of the fixing piece.

[0010] Further, there are two limiting pieces and positioning pieces respectively, and they form a cross-shaped symmetric arrangement structure; there are also two limiting grooves corresponding to the limiting pieces and avoidance grooves corresponding to the positioning pieces respectively, and they also form a cross-shaped symmetric arrangement structure. The height of the avoidance groove is greater than the height of the stopper extending out of the card slot.

[0011] Further, a circumferential accommodation groove is provided on the outer wall of the connecting rod, and the positioning member is snapped into the accommodation groove, and the height of the accommodation groove is greater than the thickness of the limiting member embedded in the limiting groove.

[0012] Further, marks aligned with the limiting block and / or the positioning member are provided on the outer wall of the movable pipe extending out of the accommodation hole.

[0013] Further, the stop block of the protruding part arranged below is of a movable mounting structure, and the stop block of the protruding part arranged above is of a fixed mounting structure.

[0014] Alternatively, a spring is sleeved outside the connecting rod, the spring is arranged in the telescopic groove, one end of the spring abuts against the stop block, and the other end abuts against the bottom of the telescopic groove.

[0015] In the utility model, by enabling the stop block to slide up and down, when installing, first control the stop block to retract into the telescopic groove, and after the installation is completed, control the stop block to extend out of the telescopic groove to stop the installation cross beam, preventing the undervoltage protector from falling off. Moreover, then control the stop block to retract into the telescopic groove so that it does not block the installation cross beam, so as to conveniently remove the undervoltage protector from the installation cross beam. In this way, the installation and disassembly of the undervoltage protection are both very convenient, and the whole structure is relatively simple and the operation is convenient. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the utility model;

[0017] Figure 2 is Figure 1 a partial enlarged view of

[0018] Figure 3 is Figure 2 an assembly schematic diagram between the connecting rod and the movable pipe shown in

[0019] Figure 4 is a top view schematic diagram of the fixing member;

[0020] Figure 5 is a top view schematic diagram of the movable pipe.

[0021] In the figure, 1 is the undervoltage protector, 11 is the card slot, 12 is the protruding part, 13 is the telescopic groove, 14 is the connection hole, 15 is the movable cavity, 2 is the stop block, 3 is the connecting rod, 31 is the accommodation groove, 4 is the limiting member, 5 is the fixing member, 51 is the accommodation hole, 52 is the limiting groove, 53 is the avoidance groove, 6 is the movable pipe, 61 is the pipe hole, and 7 is the positioning member. Detailed Description of the Embodiment

[0022] In this embodiment, with reference to Figures 1 - 5, the easily disassembled and assembled under-voltage protection device for a power distribution cabinet includes an under-voltage protector 1. At the upper and lower parts of the back of the under-voltage protector 1, there are protruding parts 12 extending backward. Between the upper and lower protruding parts 12, there is a clamping groove 11 for clamping an installation crossbeam; on the upper protruding part 12, there is a downward-extending stop block 2, and on the lower protruding part 12, there is an upward-extending stop block 2; in the lower protruding part 12, there is an installation hole position, and in the installation hole position, there is a telescopic control mechanism. The stop block 2 is connected to the telescopic control mechanism to be controllably extended from the installation hole position into the clamping groove 11 or retracted from the clamping groove 11 into the installation hole position; a part of the telescopic control mechanism extends outside the installation hole position for operation and control.

[0023] The telescopic control mechanism includes a movable tube 6. The movable tube 6 is movably connected to a connecting rod 3. The connecting rod 3 is connected to the stop block 2. The stop block 2 can be of a rectangular structure; the movable tube 6 extends out of the installation hole position to form a structure for controlling the telescopic movement of the stop block 2; in the installation hole position, there is a limiting structure. Through the limiting structure, the stop block 2 extending out of the clamping groove 11 is kept fixed so as to stably block the installation crossbeam.

[0024] The installation hole position includes three sections, namely a telescopic groove 13, a connecting hole 14, and a fixing hole (which can be a circular hole, not marked). The telescopic groove 13 is located on the inner side (i.e., the upper side) adjacent to the clamping groove 11, the fixing hole is located on the outer side (i.e., the lower side) adjacent to the external space, and the connecting hole 14 is between the telescopic groove 13 and the fixing hole; the stop block 2 is arranged in the telescopic groove 13, and the connecting rod 3 passes through the connecting hole 14 from the telescopic groove 13 and is movably connected to the movable tube 6.

[0025] The width of the connecting hole 14 is smaller than the width of the telescopic groove 13, the width of the fixing hole is larger than the width of the connecting hole 14, and the width of the baffle 2 is larger than the width of the connecting hole 14, which can block the bottom end of the stop block 2.

[0026] The limiting structure includes a fixing member 5, a limiting member 4, and a positioning member 7. The fixing member 5 is installed in the fixing hole, and the movable tube 6 is arranged in the accommodating hole 51 of the fixing member 5; the limiting member 4 is fixed on the outer wall of the movable tube 6, and the positioning member 7 is fixed on the inner wall of the movable tube 6; the connecting rod 3 is inserted into the tube hole 61 of the movable tube 6, and the positioning member 7 is movably connected to the connecting rod 3; on the fixing member 5, there are a limiting groove 52 and an avoidance groove 53 that can accommodate the limiting member 4. When the limiting member 4 is embedded in the limiting groove 52, a limiting structure for the extended state of the stop block 2 is formed. When the limiting member 4 is located in the avoidance groove 53, a structure that can pull the stop block 2 into the telescopic groove 13 is formed; between the inner end face (upper end face) of the fixing hole and the fixing member 5, there is an activity cavity 15 that can accommodate the rotation of the limiting member 4; the limiting groove 13 is opened along the hole wall of the accommodating hole 51 from the inner end face (upper end face) of the fixing member 5, and the avoidance groove 53 is axially opened on the hole wall of the accommodating hole 51 of the fixing member 5.

[0027] The limiting member 4 and the positioning member 7 each include two parts and form a cross-shaped symmetric arrangement structure; the limiting groove 52 corresponding to the limiting member 4 and the avoidance groove 53 corresponding to the positioning member 7 are also provided with two parts respectively, and also form a cross-shaped symmetric arrangement structure. The height of the avoidance groove 53 is greater than the height of the block 2 protruding from the clamping groove 11. When the block 2 protrudes from the clamping groove 11, the limiting member 4 is embedded in the limiting groove 52 and cannot move downward any further. At this time, the stable state of the protruding state of the block 2 can be maintained. If the block 2 is to be retracted into the telescopic groove 13, lift the movable tube 6 to make the limiting member 4 enter the movable cavity 15, and rotate the movable tube 6 until the limiting member 4 is aligned with the avoidance groove 53. At this time, the limiting member 4 can move downward along the avoidance groove 53 until the block 2 is completely retracted into the telescopic groove 13, that is, the stop of the mounting cross beam is released, so as to facilitate the disassembly (or installation) of the under-voltage protector 1.

[0028] A circular accommodating groove 31 is provided along the outer wall of the connecting rod 3, and the positioning member 7 is clamped in the accommodating groove 31. The height of the accommodating groove 31 is greater than the thickness of the limiting member 4 embedded in the limiting groove 52, so that the limiting member 4 can enter the movable cavity 15.

[0029] A mark (such as a marking line) aligned with the limiting block 4 and / or the positioning member 7 is provided on the outer wall of the movable tube 6 protruding from the accommodating hole 51. It can either only set the marking line aligned with the limiting block 4 or the positioning member 7, or set multiple marking lines, respectively aligned with the limiting block 4 and the positioning member 7. In this way, when rotating the movable tube 6, it is only necessary to observe the position of the marking line to know whether it is aligned with the limiting block 4 or the positioning member 7, which improves the convenience of operation.

[0030] The block 2 of the protruding part 12 arranged below is a movable mounting structure, and the block 2 of the protruding part 12 arranged above is a fixed mounting structure (movable mounting is also possible).

[0031] Another embodiment can also be adopted, that is, a spring (not shown in the figure) is sleeved outside the connecting rod 3. The spring is arranged in the telescopic groove 13. One end of the spring abuts against the block 2, and the other end abuts against the bottom of the telescopic groove 13. Usually, the block 2 protrudes from the clamping groove 11 under the action of the spring to stop the mounting cross beam. The lower movable tube 6 can pull the block 2 into the telescopic groove 13 through the connecting rod. At this time, the spring is compressed, and the block 2 will pop out after releasing the movable tube 6.

[0032] The above has made a detailed description of the present invention. The above description is only the preferred embodiment of the present invention, and the scope of implementation of the present invention cannot be limited. That is, all equal changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. An undervoltage protection device for a power distribution cabinet that is easy to disassemble and assemble, comprising an undervoltage protector, wherein the upper and lower parts of the back of the undervoltage protector are provided with protruding parts extending backward, and a slot for installation is formed between the upper and lower protruding parts; a stopper extending downward is provided on the upper protruding part, and a stopper extending upward is provided on the lower protruding part, characterized in that: At least a mounting hole is provided in the lower protruding portion, a telescopic control mechanism is provided in the mounting hole, the stopper is connected to the telescopic control mechanism so as to be controllably extended from the mounting hole into the slot or retracted from the slot into the mounting hole; a portion of the telescopic control mechanism extends out of the mounting hole for operation control.

2. The undervoltage protection device for a power distribution cabinet that is easy to disassemble and assemble according to claim 1 is characterized in that: The telescopic control mechanism includes a movable tube, which is movably connected to a connecting rod, which is connected to a stopper, and the movable tube extends from a mounting hole to form a structure for controlling the stopper to perform telescopic movement; a limiting structure is provided in the mounting hole, and the stopper extending from the slot is kept fixed by the limiting structure.

3. The undervoltage protection device for a power distribution cabinet that is easy to disassemble and assemble according to claim 2 is characterized in that: The installation hole position includes three sections, namely a telescopic slot, a connecting hole and a fixing hole. The telescopic slot is located on the inner side and adjacent to the card slot, the fixing hole is located on the outer side and adjacent to the external space, and the connecting hole is between the telescopic slot and the fixing hole; a stopper is arranged in the telescopic slot, and a connecting rod passes through the connecting hole from the telescopic slot and is movably connected to the movable tube.

4. The undervoltage protection device for a power distribution cabinet that is easy to disassemble and assemble according to claim 3 is characterized in that: The width of the connecting hole is smaller than the width of the telescopic slot, the width of the fixing hole is larger than the width of the connecting hole, and the width of the baffle is larger than the width of the connecting hole.

5. The undervoltage protection device for a power distribution cabinet that is easy to disassemble and assemble according to claim 4 is characterized in that: The limiting structure includes a fixing part, a limiting part and a positioning part. The fixing part is installed in the fixing hole, and the movable tube is arranged in the accommodating hole of the fixing part; the limiting part is fixed on the outer wall of the movable tube, and the positioning part is fixed on the inner wall of the movable tube; the connecting rod is inserted into the tube hole of the movable tube, and the positioning part is movably connected with the connecting rod; the fixing part is provided with a limiting groove and an avoiding groove capable of accommodating the limiting part, and when the limiting part is embedded in the limiting groove, a limiting structure is formed when the stop block is in the extended state, and when the limiting part is located in the avoiding groove, a structure is formed that can pull the stop block into the telescopic groove; a movable cavity capable of accommodating the limiting part for rotation is formed between the inner end surface of the fixing hole and the fixing part; the limiting groove is opened from the inner end surface of the fixing part along the hole wall of the accommodating hole, and the avoiding groove is opened axially on the hole wall of the accommodating hole of the fixing part.

6. The undervoltage protection device for a power distribution cabinet that is easy to disassemble and assemble according to claim 5 is characterized in that: The limiting member and the positioning member are respectively provided at two locations, and form a cross-shaped symmetrical arrangement structure; the limiting member corresponding to the limiting groove and the positioning member corresponding to the avoiding groove are also respectively provided at two locations, and also form a cross-shaped symmetrical arrangement structure, and the height of the avoiding groove is greater than the height of the stop block extending out of the slot.

7. The easily disassembled undervoltage protection device for a power distribution cabinet according to claim 5 or 6, characterized in that: A circle of accommodating grooves is arranged along the outer wall of the connecting rod, and the positioning piece is inserted into the accommodating groove. The height of the accommodating groove is greater than the thickness of the limiting piece embedded in the limiting groove.

8. The undervoltage protection device for a power distribution cabinet that is easy to disassemble and assemble according to claim 5 is characterized in that: A mark aligned with the limit block and / or the positioning piece is arranged on the outer wall of the movable tube extending out of the accommodating hole.

9. The easily disassembled undervoltage protection device for a power distribution cabinet according to any one of claims 1 to 6, characterized in that: The stopper arranged on the lower protruding part is a movable installation structure, and the stopper arranged on the upper protruding part is a fixed installation structure.

10. The undervoltage protection device for a power distribution cabinet that is easy to disassemble and assemble according to claim 4, characterized in that: A spring is sleeved on the outside of the connecting rod and arranged in the telescopic slot. One end of the spring abuts against the stopper, and the other end abuts against the bottom of the telescopic slot.

Images