Guide contact holder and drop-out fuse with guide groove

Abstract

The present invention relates to the technical field of fuses, and is a guiding contact seat and a drop-out fuse with a guiding groove. The guiding contact seat includes an upper contact seat, an inner wiring terminal, an outer wiring terminal, a sliding plate and a limiting rod. The upper contact seat is in a U shape with an opening downward, and a working groove penetrating through the left and right is provided on the lower end surface of the upper contact seat; an inner wiring terminal located in the working groove is fixedly installed on the right part of the upper contact seat; the drop-out fuse with a guiding groove includes a guiding contact seat, a lower contact seat, a fusing device, an insulator and a lower wiring terminal, and the left end of the upper contact seat is fixedly installed together with the upper end of the insulator. The structure of the present invention is reasonable and compact, and it is convenient to use. By clamping the upper end of the fusing device into the clamping area, the upper end of the fuse is accurately contacted with the inner wiring terminal to realize closing; the position of the limiting rod is adjusted through the sliding assembly and the limiting assembly to meet the requirements of different closing positions, and it has the characteristics of fast, efficient and accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of fuses, and is a guiding contact base and a drop-out fuse with a guiding groove. Background Art

[0002] The drop-out fuse is one of the most commonly used short-circuit protection switches for the branch lines of 10kV distribution lines and distribution transformers. It has the characteristics of economy, convenient operation, and strong adaptability to outdoor environments, and is widely used in 10kV distribution lines and the primary side of distribution transformers for protection and equipment switching operations.

[0003] In the currently widely used RW7-10 drop-out fuses in 10kV line systems and distribution transformers, due to the different specifications of each fuse and the installation site, after the fuse is installed, it is often impossible to achieve flexible pulling and closing operations. For example, when closing, the upper end of the fuse cannot accurately contact the wiring terminal on the contact base, thus greatly reducing the function of the drop-out fuse. Summary of the Invention

[0004] The present invention provides a guiding contact base and a drop-out fuse with a guiding groove, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problem that the upper end of the existing fuse cannot accurately contact the wiring terminal on the contact base during the closing process.

[0005] One technical solution of the present invention is achieved by the following measures: A guiding contact base includes an upper contact base, an inner wiring terminal, an outer wiring terminal, a sliding plate, and a limiting rod. The upper contact base is in a U shape with an opening downward, and a working groove penetrating left and right is provided on the lower end surface of the upper contact base; an inner wiring terminal located in the working groove is fixedly installed on the right part of the upper contact base, and an outer wiring terminal capable of communicating with the inner wiring terminal is fixedly installed on the left end of the upper end surface of the upper contact base; a sliding plate is provided below the upper contact base, and a sliding assembly capable of moving the upper end of the sliding plate left and right in the working groove is provided in the working groove; the limiting rod is in a C shape with an opening to the right, and the limiting rod includes a front rod, a left rod, and a rear rod. The front rod is in an inclined shape from left rear to right front, the rear rod is in an inclined shape from left front to right rear, a clamping area is formed between the right part of the front rod and the right part of the rear rod, the left side of the sliding plate is installed together with the left rod, the left end of the front rod is fixedly installed with the front end of the left rod, and the left end of the rear rod is fixedly installed with the rear end of the left rod.

[0006] The following is a further optimization and / or improvement of the above-mentioned technical solution of the invention:

[0007] The above-mentioned sliding assembly may include sliding rails, sliders and driving screws. At least one sliding rail is distributed at intervals in the front and rear of the working groove. The lower end of the sliding rail is provided with a sliding groove that passes through the left and right sides. The sliding groove is in an inverted T shape. A slider is provided in each sliding groove, and the lower end of the slider is fixedly installed at the corresponding position of the upper end of the sliding plate; a driving screw is provided in any sliding groove, and the driving screw and the slider in the corresponding sliding groove are fixedly installed together through a threaded connection.

[0008] The above-mentioned sliding plate may include an inclined plate and a straight plate. The inclined plate is inclined with the left side higher than the right side. The lower end of the inclined plate is fixedly installed with the upper end of the straight plate. The lower ends of the sliding blocks are fixedly installed with the corresponding positions of the upper ends of the inclined plate. The left side of the straight plate is installed with the left rod.

[0009] The left rod can rotate around its own axis, and a limiting component capable of limiting the rotation of the left rod can be provided on the left side of the straight plate.

[0010] The above-mentioned limiting assembly may include a front sleeve, a rear sleeve, a limiting rod and an arc-shaped rack. The middle part of the left rod is sequentially spaced from front to back with the front sleeve and the rear sleeve. The right sides of the front sleeve and the rear sleeve are respectively fixedly installed with the corresponding positions of the straight plate, and the limiting rod is fixedly installed on the outer side of the left rod corresponding to the position between the front sleeve and the rear sleeve; the limiting rod is L-shaped, and the limiting rod includes a connecting part and a limiting part. The right end of the connecting part is fixedly installed with the outer side of the middle part of the left rod, and the rear part of the left end of the connecting part is fixedly installed with the front end of the limiting part; an arc-shaped rack is provided at the lower left side of the inclined plate corresponding to the right position of the limiting part, and the arc-shaped rack is in an arc shape with an opening to the right. A limiting tooth capable of inserting the lower end of the limiting part into the arc-shaped rack is provided on the left side of the arc-shaped rack, and the upper end of the arc-shaped rack is fixedly installed with the lower left part of the inclined plate.

[0011] The above-mentioned limiting assembly may also include a return spring, and the lower end of the arc-shaped rack is fixedly installed with the lower left part of the straight plate through the return spring.

[0012] The above can also include a clamping front hook and a clamping rear hook, both of which are semicircular with an opening to the left. The left side of the lower end of the clamping front hook is fixedly installed with the right end of the front rod, and the left side of the lower end of the clamping rear hook is fixedly installed with the right end of the rear rod.

[0013] The above also includes a cover plate, and the right end of the upper end surface of the upper contact seat is hinged with the left end of the cover plate.

[0014] The second technical solution of the present invention is achieved through the following measures: a drop-out fuse with a guide groove using the above-mentioned guide contact seat, including a guide contact seat, a lower contact seat, a fuse device, an insulator and a lower wiring terminal, the left end of the upper contact seat is fixedly installed together with the upper end of the insulator, the lower end of the insulator is fixedly installed together with the left end of the lower contact seat, the right end of the lower contact seat is hinged together with the lower end of the fuse device, and the upper end of the fuse device is stuck in the clamping area and contacts with the internal wiring terminal.

[0015] The present invention has a reasonable and compact structure and is easy to use. It clamps the upper end of the fuse device into the clamping area so that the upper end of the fuse is accurately in contact with the internal wiring terminal to achieve closing. The position of the limit rod is adjusted by the sliding component and the limit component to meet different closing position requirements. It has the characteristics of being fast, efficient and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment.

[0017] Attached Figure 2 It is a schematic diagram of the three-dimensional structure of the second embodiment.

[0018] The codes in the accompanying drawings are: 1 is an upper contact seat, 2 is an inner terminal, 3 is an outer terminal, 4 is a front rod, 5 is a left rod, 6 is a slide rail, 7 is a slider, 8 is a drive screw, 9 is an inclined plate, 10 is a straight plate, 11 is a front sleeve, 12 is a rear sleeve, 13 is an arc-shaped rack, 14 is a connecting part, 15 is a limiting part, 16 is a reset spring, 17 is a clamping front hook, 18 is a cover plate, 19 is a lower contact seat, 20 is a fuse device, 21 is an insulator, 22 is a lower terminal, and 23 is a mounting plate. DETAILED DESCRIPTION

[0019] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0020] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout direction of the A direction is used for description, such as: the positional relationship of front, back, up, down, left, right, etc. is determined according to the layout direction of the drawings in the specification.

[0021] The present invention will be further described below in conjunction with embodiments and drawings:

[0022] Embodiment 1: As shown in the attached Figure 1As shown in the figure, the guiding contact base includes an upper contact base 1, an internal wiring terminal 2, an external wiring terminal 3, a sliding plate and a limiting rod. The upper contact base 1 is in a U shape with an opening downward, and a working groove penetrating left and right is provided on the lower end surface of the upper contact base 1; an internal wiring terminal 2 located in the working groove is fixedly installed on the right part of the upper contact base 1, and an external wiring terminal 3 capable of communicating with the internal wiring terminal 2 is fixedly installed on the left end of the upper end surface of the upper contact base 1; a sliding plate is provided below the upper contact base 1, and a sliding assembly capable of moving the upper end of the sliding plate left and right in the working groove is provided in the working groove; the limiting rod is in a C shape with an opening to the right, and the limiting rod includes a front rod 4, a left rod 5 and a rear rod. The front rod 4 is in an inclined shape from left rear to right front, and the rear rod is in an inclined shape from left front to right rear. A clamping area is formed between the right part of the front rod 4 and the right part of the rear rod. The left side of the sliding plate is installed together with the left rod 5, the left end of the front rod 4 is fixedly installed with the front end of the left rod 5, and the left end of the rear rod is fixedly installed with the rear end of the left rod 5. During the use process, first, this embodiment is fixedly installed together with the existing well-known drop fuse, insulating control, and lower mounting base. Specifically, the left end of the upper contact base 1 is fixedly installed with the upper end of the insulating control, the lower end of the insulating control is fixedly installed with the left end of the lower mounting base, and the right end of the lower mounting base is hinged with the lower end of the drop fuse. After aligning and contacting the upper end of the drop fuse with the internal wiring terminal 2, the position of the limiting rod is adjusted through the sliding assembly and the limiting assembly so that the position after the upper end of the drop fuse is aligned and contacted with the internal wiring terminal 2 just snaps into the clamping area and cannot move leftward continuously; in addition, because the front rod 4 is in an inclined shape from left rear to right front, and the rear rod is in an inclined shape from left front to right rear, the distance between the left part of the front rod 4 and the left part of the rear rod is smaller than the distance between the right part of the front rod 4 and the right part of the rear rod. Therefore, the upper end of the drop fuse snapped into the clamping area cannot move leftward continuously. According to requirements, the included angle between the front rod 4 and the left rod 5 can be between 90° and 100°, and the included angle between the rear rod and the left rod 5 can be between 90° and 100°; after adjusting the position of the limiting rod, the upper end of the drop fuse is removed from the right side of the clamping area, that is, the switch is turned off, and then this embodiment and the drop fuse, insulating control, and lower mounting base are installed back to the designated position together, so as to facilitate the smooth completion of the subsequent switch-on operation of this embodiment.

[0023] According to actual needs, the above guiding contact base can be further optimized and / or improved as follows:

[0024] Such as attached Figure 1As shown, the sliding assembly includes a slide rail 6, a slider 7 and a driving screw 8. At least one slide rail 6 is spaced apart in the front and rear of the working groove. The lower end of the slide rail 6 is provided with a sliding groove that runs through left and right. The sliding groove is in an inverted T shape. Each sliding groove is provided with a slider 7. The lower end of the slider 7 is fixedly installed at a corresponding position on the upper end of the sliding plate. A driving screw 8 is provided in any sliding groove. The driving screw 8 is fixedly installed with the slider 7 in the corresponding sliding groove through a threaded connection. According to the needs, the slider 7 can use existing well-known technologies, such as nuts. During use, the left and right movement of the sliding plate is achieved by the screw nut pair composed of the slider 7 and the driving screw 8, so that the position of the limit rod can be adjusted.

[0025] As attached Figure 1 As shown, the sliding plate includes an inclined plate 9 and a straight plate 10, the inclined plate 9 is inclined with the left side higher than the right side, the lower end of the inclined plate 9 is fixedly mounted with the upper end of the straight plate 10, the lower ends of the sliders 7 are fixedly mounted with the corresponding positions of the upper end of the inclined plate 9, and the left side of the straight plate 10 is mounted with the left rod 5. In use, through such an arrangement, position interference between the various mechanisms of this embodiment can be avoided.

[0026] As attached Figure 1 As shown, the left rod 5 can rotate around its own axis, and the left side of the straight plate 10 is provided with a limit assembly that can limit the rotation of the left rod 5. In use, through such an arrangement, the position of the limit rod can be adjusted, thereby changing the position of the clamping area.

[0027] As attached Figure 1 As shown, the limiting assembly includes a front sleeve 11, a rear sleeve 12, a limiting rod and an arc-shaped rack 13. The front sleeve 11 and the rear sleeve 12 are sequentially spaced from front to back in the middle of the left rod 5. The right sides of the front sleeve 11 and the rear sleeve 12 are fixedly installed with the corresponding positions of the straight plate 10 respectively, and the limiting rod is fixedly installed on the outer side of the left rod 5 corresponding to the position between the front sleeve 11 and the rear sleeve 12; the limiting rod is L-shaped, and the limiting rod includes a connecting portion 14 and a limiting portion 15. The right end of the connecting portion 14 is fixedly installed with the outer side of the middle part of the left rod 5, and the rear part of the left end of the connecting portion 14 is fixedly installed with the front end of the limiting portion 15; an arc-shaped rack 13 is provided at the lower left side of the inclined plate 9 corresponding to the right position of the limiting portion 15. The arc-shaped rack 13 is in an arc shape with an opening to the right, and a limiting tooth capable of enabling the lower end of the limiting portion 15 to be stuck therein is provided on the left side of the arc-shaped rack 13, and the upper end of the arc-shaped rack 13 is fixedly installed with the lower left side of the inclined plate 9. During use, such an arrangement can be used to limit the position of the limit rod after adjusting the position of the limit rod, thereby ensuring that the position of the clamping area after adjustment does not change.

[0028] As attached Figure 1As shown, the limit assembly also includes a return spring 16, and the lower end of the arc-shaped rack 13 is fixedly installed with the lower left part of the straight plate 10 through the return spring 16. During use, by installing the spring, when the position of the limit rod is adjusted, the lower end of the arc-shaped rack 13 can be pressed down, so that the limit portion 15 is clamped into the appropriate limit tooth, and the lower end of the arc-shaped rack 13 is restored to the initial position under the action of the spring restoring force.

[0029] As attached Figure 1 As shown, it also includes a clamping front hook 17 and a clamping rear hook, both of which are semicircular with an opening to the left, and the left side of the lower end of the clamping front hook 17 is fixedly installed with the right end of the front rod 4, and the left side of the lower end of the clamping rear hook is fixedly installed with the right end of the rear rod. During use, such an arrangement can increase the contact area of ​​the upper end of the clamping drop-out fuse, thereby ensuring that this embodiment is more stable and reliable during use.

[0030] As attached Figure 1 As shown, it also includes a cover plate 18, and the right end of the upper end surface of the upper contact seat 1 is hinged together with the left end of the cover plate 18. During use, by setting the cover plate 18, the right end of the cover plate 18 can be pulled down after closing the switch, thereby protecting the various components of this embodiment.

[0031] Embodiment 2: As shown in the attached Figure 1 , 2 As shown, the drop-out fuse with guide groove using the above-mentioned guide contact seat includes a guide contact seat, a lower contact seat 19, a fuse device 20, an insulator 21 and a lower terminal 22. The left end of the upper contact seat 1 is fixedly installed together with the upper end of the insulator 21, the lower end of the insulator 21 is fixedly installed together with the left end of the lower contact seat 19, the right end of the lower contact seat 19 is hinged together with the lower end of the fuse device 20, and the upper end of the fuse device 20 is stuck in the clamping area and contacts with the inner terminal 2. During use, the upper contact seat 1 is first fixedly installed together with the existing well-known fuse device 20, the insulator 21, and the lower contact seat 19, and after the upper end of the fuse device 20 is aligned with and in contact with the internal wiring terminal 2, the circuit breaker is closed, and the position of the limit rod is adjusted through the sliding component and the limit assembly so that the position after the upper end of the fuse device 20 is aligned with and in contact with the internal wiring terminal 2 is just stuck in the clamping area and cannot move further to the left; when the position of the limit rod is adjusted, the upper end of the fuse device 20 is removed from the right side of the clamping area, that is, the circuit breaker is pulled, and then the present embodiment is installed back to the specified position, which can be fixed by the mounting plate 23, thereby facilitating the smooth completion of the subsequent closing operation of the present embodiment.

[0032] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A guide contact seat, characterized in that It includes an upper contact base, an inner terminal, an outer terminal, a sliding plate and a limiting rod. The upper contact base is in a U shape with an opening downward, and a working groove that penetrates left and right is provided on the lower end face of the upper contact base; an inner terminal located in the working groove is fixedly installed on the right part of the upper contact base, and an outer terminal that can communicate with the inner terminal is fixedly installed on the left end of the upper end face of the upper contact base; a sliding plate is provided below the upper contact base, and a sliding component that can move the upper end of the sliding plate left and right in the working groove is provided in the working groove; the limiting rod is in a C shape with an opening to the right, and the limiting rod includes a front rod, a left rod and a rear rod. The front rod is inclined from left rear to right front, the rear rod is inclined from left front to right rear, and a clamping area is formed between the right part of the front rod and the right part of the rear rod. The left side of the sliding plate is installed together with the left rod, the left end of the front rod is fixedly installed with the front end of the left rod, and the left end of the rear rod is fixedly installed with the rear end of the left rod; the sliding component includes a slide rail, a slider and a driving screw. At least one slide rail is distributed at intervals in the front and rear directions in the working groove. A sliding groove that penetrates left and right is provided at the lower end of the slide rail. The sliding groove is in an inverted T shape. A slider is provided in each sliding groove, and the lower ends of the sliders are fixedly installed with the corresponding positions on the upper end of the sliding plate; a driving screw is provided in any one of the sliding grooves, and the driving screw is fixedly installed with the slider in the corresponding sliding groove through threaded connection; the sliding plate includes an inclined plate and a straight plate. The inclined plate is inclined from high on the left to low on the right, and the lower end of the inclined plate is fixedly installed with the upper end of the straight plate. The lower ends of the sliders are fixedly installed with the corresponding positions on the upper end of the inclined plate. The left side of the straight plate is installed together with the left rod; the left rod can rotate around its own axis, and a limiting component that can limit the rotation of the left rod is provided on the left side of the straight plate; the limiting component includes a front sleeve, a rear sleeve, a limiting rod and an arc-shaped rack. The middle part of the left rod is sleeved with the front sleeve and the rear sleeve in sequence from front to back at intervals. The right sides of the front sleeve and the rear sleeve are fixedly installed with the corresponding positions on the straight plate respectively. A limiting rod is fixedly installed on the outer side of the left rod at the position between the corresponding front sleeve and rear sleeve; the limiting rod is in an L shape and includes a connecting part and a limiting part. The right end of the connecting part is fixedly installed with the outer side of the middle part of the left rod, and the rear part of the left end of the connecting part is fixedly installed with the front end of the limiting part; an arc-shaped rack is provided below the left side of the inclined plate at the position right of the corresponding limiting part. The arc-shaped rack is in an arc shape with an opening to the right. A limiting tooth into which the lower end of the limiting part can be inserted is provided on the left side of the arc-shaped rack. The upper end of the arc-shaped rack is fixedly installed with the lower part of the left side of the inclined plate; the included angle between the front rod and the left rod is between 90° and 100°, and the included angle between the rear rod and the left rod is between 90° and 100°.

2. The guide contact seat according to claim 1, characterized in that The limiting component further includes a return spring, and the lower end of the arc-shaped rack is fixedly installed with the lower part of the left side of the straight plate through the return spring.

3. The guide contact seat according to claim 1 or 2, characterized in that It further includes a clamping front hook and a clamping rear hook. Both the clamping front hook and the clamping rear hook are in a semi-circular ring shape with an opening to the left. The left side of the lower end of the clamping front hook is fixedly installed with the right end of the front rod, and the left side of the lower end of the clamping rear hook is fixedly installed with the right end of the rear rod.

4. The guide contact seat according to claim 1 or 2, characterized in that It further includes a cover plate, and the right end of the upper end face of the upper contact base is hinged with the left end of the cover plate.

5. The guide contact seat according to claim 3, characterized in that It further includes a cover plate, and the right end of the upper end face of the upper contact base is hinged with the left end of the cover plate.

6. A drop-out fuse with a guide groove using the guide contact seat according to any one of claims 1 to 5, characterized in that It includes a guide contact seat, a lower contact seat, a fuse device, an insulator and a lower wiring terminal. The left end of the upper contact seat is fixedly installed together with the upper end of the insulator, the lower end of the insulator is fixedly installed together with the left end of the lower contact seat, the right end of the lower contact seat is hinged together with the lower end of the fuse device, and the upper end of the fuse device is stuck in the clamping area and contacts with the inner wiring terminal.

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