A medium voltage switch cabinet low voltage secondary distribution room with a drop-down frame

Abstract

The present invention provides a medium-voltage switch cabinet low-voltage secondary distribution room with a pull-down frame, and relates to the field of medium-voltage switch cabinet low-voltage secondary distribution room. The pull-down frame of the low-voltage distribution room includes a medium-voltage cabinet body and an operating door installed on the upper part of the medium-voltage cabinet body. The inner wall of the medium-voltage cabinet body is hinged with a spring rod assembly, and the other end of the spring rod assembly is hinged with a straight plate for tilting. The straight plate is provided with a straight groove inside, and a positioning block is slidably connected inside the straight groove. When the pull-down frame of the low-voltage distribution room is opened, the operating door does not need to use other tools, which is more convenient. When opened, the operating door can lower the position of the operating door, which is easy to operate, and can keep a safe distance between the operating door and the medium-voltage cabinet body. When closing the operating door, it only needs to lift the operating door upward. When the straight plate and the positioning block are in a horizontal state, the operating door is automatically closed, which saves time and effort. The slow movement of the operating door during the closing process can avoid damage.

Description

Technical Field

[0001] The invention relates to the field of low-voltage secondary power distribution rooms of medium-voltage switch cabinets, and in particular to a low-voltage secondary power distribution room of a medium-voltage switch cabinet with a pull-down frame. Background Art

[0002] The low-voltage secondary distribution room of the medium-voltage switchgear refers to the low-voltage secondary room of the medium-voltage switchgear in the indoor power distribution place with low-voltage loads. It is the secondary function of the medium-voltage switchgear circuit breaker operation execution, position indication of functional components, fault alarm, instrument measurement and protection action, etc. It plays a vital role in the operation of the medium-voltage switchgear in the power supply and distribution link of the entire power system. This is the core functional component equipment of the medium-voltage switchgear in the low-voltage distribution room, which is composed of multiple independent or integrated cabinets. The cabinet is equipped with electrical components such as circuit breakers, secondary terminals of disconnectors, contactor measuring instruments, relays, microcomputer protection, indicator lights, intelligent operation and display, multi-function meters, etc., which are used to control and protect the normal circuit distribution of the panel cabinet. Different types of distribution cabinets have different functions, such as the incoming cabinet is responsible for introducing power, the outgoing cabinet distributes electric energy to each branch, and the capacitor compensation cabinet is used to improve the power factor.

[0003] Traditional medium-voltage switchgear is divided into three layers of doors: upper, middle and lower. The door of the low-voltage distribution room on the top layer is designed to be higher. When opening the operating door, personnel need to use auxiliary tools such as stools. Due to the high height of the door, it is not easy to operate the panel after opening the door. Operators may need to maintain an uncomfortable posture for a long time when operating the panel, which can easily lead to fatigue and operational errors. This not only reduces work efficiency, but also increases safety risks during operation. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a medium-voltage switch cabinet low-voltage secondary distribution room with a pull-down frame. When the operating door is opened, the position of the operating door can be lowered for easy operation, and when closed, it is more labor-saving.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a medium-voltage switchgear low-voltage secondary distribution room with a pull-down frame, comprising a medium-voltage cabinet body and an operating door installed on the upper part of the medium-voltage cabinet body, the inner wall of the medium-voltage cabinet body is hinged with a spring rod assembly, the other end of the spring rod assembly is hinged with a straight plate for tilting, a straight groove is provided inside the straight plate, a positioning block is slidably connected inside the straight groove, a support block is fixedly connected between one side of the positioning block and the inner wall of the medium-voltage cabinet body, an inclined card groove is provided at one end of the straight groove away from the positioning block, a limiter A and a limiter B are fixedly installed on one side of the operating door, a support block is fixedly installed on one end of the straight plate close to the operating door, the limiter B is used to press the support block in a horizontal state, and the limiter A is used to press the support block in an inclined state;

[0006] A longitudinal guide rail is fixedly installed on one side of the operating door, a transverse guide rail is fixedly installed on the inner wall of the medium voltage cabinet body, a horizontal plate A and a horizontal plate B are slidably connected inside the transverse guide rail, an arc guide rail is fixedly connected between the horizontal plate A and the horizontal plate B, a limiting column located in the arc guide rail is fixedly installed on one side of the straight plate, and one end of the horizontal plate B is slidably connected to the longitudinal guide rail.

[0007] Preferably, the spring rod assembly is arranged obliquely and is parallel to the inclined straight plate.

[0008] Preferably, one end of the limiting member A and the limiting member B are cylindrical, and the distance between one end of the limiting member A and the operating door is greater than the distance between one end of the limiting member B and the operating door.

[0009] Preferably, the card slot is located at an eccentric position of the straight plate.

[0010] Preferably, the operating door further comprises a support plate for pushing the support block, and the support plate is located below the support block.

[0011] Preferably, the limiting column contacts the inner wall of the arc-shaped guide rail and is used to slide along the arc-shaped guide rail.

[0012] Preferably, the interior of the longitudinal guide rail and one end of the transverse plate A are both L-shaped, and the transverse plate A is in contact with the longitudinal guide rail, and there is friction between the two.

[0013] Preferably, a handle is installed at the bottom of one side of the operating door.

[0014] Preferably, the spring rod assembly includes a fixed block for fixing to the inner wall of the medium voltage cabinet body, a connecting member A for hingedly connected to the fixed block, a connecting member B for hingedly connected to the straight plate, a spring and a telescopic rod installed between the connecting member A and the connecting member B, and the two ends of the spring are fixedly connected to the connecting member A and the connecting member B respectively.

[0015] Preferably, the telescopic rod includes an insertion rod and a sleeve, the insertion rod and the sleeve are slidably connected, and there is friction resistance between the two, and one end of the insertion rod and the sleeve is fixedly connected to the connecting member A and the connecting member B respectively.

[0016] Compared with the prior art, the present invention has the following beneficial effects: through the provision of a spring rod assembly, a straight plate and a positioning block, there is horizontal movement cooperation and rotation cooperation between the straight plate and the positioning block, and when the operating door is opened, no other tools are needed, which is more convenient. When opened, the operating door first moves horizontally and then drops vertically, which not only can lower the position of the operating door for easy operation, but also because the height of the operating door is reduced, it will be very easy to operate the panel at the operating door, so that the staff can maintain a comfortable posture for a long time, avoiding fatigue and operating errors when operating the panel, and can keep the operating door at a safe distance from the medium voltage cabinet body. When closing the operating door, you only need to lift the operating door upwards, and when the straight plate and the positioning block are in a horizontal state, the operating door can be automatically closed, saving time and effort, and the operating door can move slowly during the closing process to avoid damage to the operating door when it is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the medium voltage cabinet body of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure inside the medium voltage cabinet body of the present invention;

[0019] Figure 3 A sectional view of a top view of a longitudinal guide rail and a transverse guide rail of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the longitudinal guide rail and the transverse guide rail of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the straight plate of the present invention during the process of moving along the positioning block;

[0022] Figure 6 It is a structural schematic diagram of the present invention when the straight board is tilted and the positioning block is inserted into the slot;

[0023] Figure 7 It is a schematic diagram of the structure when the support block supports the limit column A of the present invention.

[0024] Among them: 1. Medium voltage cabinet body; 2. Operating door; 3. Spring rod assembly; 301. Fixed block; 302. Connector A; 303. Connector B; 304. Telescopic rod; 4. Straight plate; 5. Straight groove; 6. Positioning block; 7. Support block; 8. Slot; 9. Limiter A; 10. Limiter B; 11. Support block; 12. Longitudinal guide rail; 13. Transverse guide rail; 14. Horizontal plate A; 15. Horizontal plate B; 16. Arc guide rail; 17. Limit column; 18. Support plate; 19. Handle. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 7As shown, a medium-voltage switch cabinet low-voltage secondary distribution room with a pull-down frame includes a medium-voltage cabinet body 1 and an operating door 2 installed on the upper part of the medium-voltage cabinet body 1. A handle 19 is installed at the bottom of one side of the operating door 2. The inner wall of the medium-voltage cabinet body 1 is hinged with a spring rod assembly 3. The spring rod assembly 3 includes a fixed block 301 for fixing to the inner wall of the medium-voltage cabinet body 1, a connector A302 for hinged connection with the fixed block 301, a connector B303 for hinged connection with the straight plate 4, a spring and a telescopic rod 304 installed between the connector A302 and the connector B303. The two ends of the spring are fixedly connected to the connector A302 and the connector B303 respectively. The telescopic rod 304 includes a plug rod and a sleeve. The plug rod and the sleeve are slidably connected, and there is a gap between the two. There is friction resistance. One end of the plug rod and the sleeve are fixedly connected to the connector A302 and the connector B303 respectively. The other end of the spring rod assembly 3 is hinged with a straight plate 4 for tilting. The straight plate 4 is located at the bottom of the uppermost room of the medium-voltage cabinet body 1. The number of straight plates 4 is set to two, and the two straight plates 4 are symmetrically arranged. The spring rod assembly 3 is tilted and parallel to the tilted straight plate 4. A straight groove 5 is opened inside the straight plate 4. A positioning block 6 is slidably connected inside the straight groove 5. A support block 7 is fixedly connected between one side of the positioning block 6 and the inner wall of the medium-voltage cabinet body 1. An inclined card slot 8 is opened at the end of the straight groove 5 away from the positioning block 6. The card slot 8 is located at the eccentric position of the straight plate 4. When the limit block is inserted into the card slot 8, the operating door 2 is easier to descend.

[0026] A limiter A9 and a limiter B10 are fixedly installed on one side of the operating door 2, and a support block 11 is fixedly installed on one end of the straight plate 4 close to the operating door 2. The support block 11 is in an arc shape. The limiter B10 is used to press the support block 11 in a horizontal state, and the limiter A9 is used to press the support block 11 in an inclined state. The support block 11, the limiter A9 and the limiter B10 are in the same horizontal plane, and the limiter A9 is located above the limiter B10. One end of the limiter A9 and the limiter B10 It is cylindrical, and the distance between one end of the limit member A9 and the operating door 2 is greater than the distance between one end of the limit member B10 and the operating door 2. After the straight plate 4 drives the support block 11 to tilt, the limit member B10 disengages from the support block 11, so that the operating door 2 can drive the limit member A9 to descend and make the limit member A9 press the support block 11. The operating door 2 also includes a support plate 18 for pushing the support block 11. The support plate 18 is located below the support block 11 and is fixedly installed on one side of the operating door 2.

[0027] A longitudinal guide rail 12 is fixedly installed on one side of the operating door 2, and a transverse guide rail 13 is fixedly installed on the inner wall of the medium voltage cabinet body 1. The interior of the transverse guide rail 13 is slidably connected with a transverse plate A14 and a transverse plate B15. The interior of the longitudinal guide rail 12 and one end of the transverse plate A14 are both L-shaped. The transverse plate A14 contacts the longitudinal guide rail 12, and there is friction between the two. The transverse plate A14 can drive the longitudinal guide rail 12 to move horizontally, and the longitudinal guide rail 12 can move longitudinally along one end of the transverse plate A14. An arc guide rail 16 is fixedly connected between the transverse plate A14 and the transverse plate B15. A limiting column 17 located in the arc guide rail 16 is fixedly installed on one side of the straight plate 4. One end of the transverse plate B15 is slidably connected to the longitudinal guide rail 12, and the limiting column 17 contacts the inner wall of the arc guide rail 16 and is used to slide along the arc guide rail 16.

[0028] Working principle:

[0029] When the top operating door 2 needs to be opened, first pull the handle 19 to move the operating door 2 laterally away from the medium voltage cabinet body 1. Since the handle 19 is located at the bottom of the operating door 2, it is easier for personnel to lift the handle by hand without the need to step on a high place with the help of other tools. Then, the operating door 2 drives the longitudinal guide rail 12 to move laterally, and the longitudinal guide rail 12 drives the transverse plate A14 to move laterally. Since the transverse plate A14, the arc guide rail 16, and the transverse plate B15 are fixed, when the transverse plate A14 moves, the arc guide rail 16 and the transverse plate B15 also move along the direction of the transverse guide rail 13. The moving process In the embodiment, the transverse plate B15 is always located in the transverse guide rail 13. The transverse plate B15 is used to further improve the stability of the arc guide rail 16. Since the arc guide rail 16 is in contact with the limiting column 17, when it moves, the arc surface of the arc guide rail 16 squeezes the limiting column 17 and drives the limiting column 17 to move horizontally. The limiting column 17 drives the straight plate 4 to move, and the straight plate 4 drives the connecting piece B303 to move. At this time, since the fixing block 301 is fixed to the distribution box body, when the connecting piece B303 moves, the spring in the spring rod assembly 3 can be stretched; when the straight plate 4 moves, the straight groove 5 in the straight plate 4 moves along the surface of the positioning block 6, such as Figure 5 As shown, the slot 8 in the straight slot 5 will move to the position of the positioning block 6, such as Figure 6As shown, since the slot 8 is located at the eccentric position of the straight plate 4, under the action of the gravity of the operating door 2, using the principle of lever, the limiter B10 can exert downward pressure on the support block 11 and drive the support block 11 to descend, so that the support block 11 drives the straight plate 4 to rotate with the positioning block 6 as the fulcrum until the positioning block 6 is completely stuck in the slot 8. At this time, the horizontal distance between the end of the rotated support block 11 that contacts the limiter B10 and the operating door 2 increases, so that the limiter B10 is separated from the support block 11 and loses the supporting force, thereby allowing the operating door 2 to descend under the action of its gravity. It should be noted that when the operating door 2 descends, the staff only needs to lightly support the handle 19 with their hands and let the operating door 2 descend slowly to prevent damage caused by descending too quickly. Moreover, when the operating door 2 descends, it will drive the longitudinal slide rail to descend along one end of the horizontal plate A14. The longitudinal slide rail and the horizontal plate A14 are in contact and there is friction. This friction can overcome part of the gravity of the operating door 2, making it more labor-saving to lift the handle 19 when it descends.

[0030] It should be noted that when the straight board 4 rotates, the limit column 17 can be driven to move along the arc guide rail 16. When the straight board 4 rotates to the maximum angle, the limit column 17 contacts the bottom of the inner wall of the arc guide rail 16, and the arc guide rail 16 can support the limit column 17, thereby improving the stability of the straight board 4 and preventing the straight board 4 from being damaged due to large force.

[0031] Then, if Figure 7 As shown, since the straight plate 4 is parallel to the spring rod assembly 3, the spring rod applies a unidirectional pulling force to the straight plate 4 that is horizontal to the straight plate 4. Under the effect of the straight plate 4 and the arc surface of the slot 8 contacting each other, the straight plate 4 is fixed to prevent the straight plate 4 from deflecting, so as to improve the stability of the straight plate 4. When the operating door 2 drives the limiting member A9 and the limiting member B10 to continue to descend, and after the limiting member A9 is out of contact with the supporting block 11, the limiting member B10 will descend to a position in contact with the supporting block 11, and the supporting block 11 supports the limiting member B10, and then supports the operating door 2. At this time, the operating door 2 descends to a lower position. Since the height of the operating door 2 is lowered, it is very easy to operate the panel at the operating door 2, so that the staff can maintain a comfortable posture for a long time and avoid fatigue and operating errors when operating the panel. This not only improves work efficiency but also reduces safety risks during operation. Through the above process, the operating door 2 first moves horizontally and then drops vertically, which not only can lower the position of the operating door 2 for easy operation, but also can keep a safe distance between the operating door 2 and the medium voltage cabinet body 1, preventing the operating door 2 from interfering with the pipelines and lines in the medium voltage cabinet body 1 and the operating panel below the medium voltage cabinet body 1.

[0032] Next, when the operation is completed and the operating door 2 needs to be put back to its original position, it is only necessary to lift the handle 19 upwards and drive the operating door 2 to rise. The operating door 2 will drive the limit member A9 and the support plate 18 to rise, so that the limit member A9 is disengaged from the support block 11, and after the support plate 18 rises to contact with the support block 11, it will apply an upward thrust to the support block 11, thereby causing the end of the straight plate 4 close to the support block 11 to be subjected to an upward force, and then the straight plate 4 will rotate in the opposite direction. At this time, the slot 8 in the straight plate 4 will rotate along the end of the positioning block 6. It should be noted that since the slot 8 and the positioning block 6 are in contact during the relative rotation, the positioning block 6 can prevent the straight plate 4 from moving horizontally, thereby preventing the operating door 2 from moving horizontally during the rising process; since the operator stands on the ground during the lifting process, there is a very comfortable fulcrum, making the lifting process easier.

[0033] Finally, when the straight plate 4 rotates to the horizontal state, start to let go. At this time, the slot 8 is completely disengaged from the positioning block 6; during the rotation of the support block 11 driven by the straight plate 4, the lateral distance between one end of the support block 11 and the operating door 2 is reduced, so that when the support block 11 is released, it contacts the limit piece B10 again and supports the limit piece B10, thereby supporting the operating door 2. It should be noted that, since the straight plate 4 rotates in the opposite direction and reaches the horizontal state, the spring rod assembly 3 is no longer parallel to the straight plate 4, but applies an oblique pulling force to the straight plate 4, and the spring in the spring rod assembly 3 is in a stretched state. The oblique pulling force applied by the spring to the straight plate 4 can be decomposed into a lateral pulling force and a longitudinal pulling force. The lateral pulling force can drive the straight plate 4 to move horizontally, and the straight plate 4 drives The limit column 17 moves, and the limit column 17 drives the arc guide rail 16 to move, and the arc guide rail 16 drives the horizontal plate A14 and the horizontal plate B15 to move, and the horizontal plate A14 pulls the longitudinal guide rail 12 to move, and the longitudinal guide rail 12 drives the operating door 2 to reset. During the process of the horizontal movement and resetting of the operating door 2, no human participation is required. Therefore, when closing the operating door 2, it is easier to close the operating door 2 than to push the operating door 2 inward by hand. It should be noted that due to the sliding connection between the sleeve and the plug rod in the spring rod assembly 3, and the friction between the two, this friction enables the sleeve and the plug rod to move slowly, thereby allowing the operating door 2 to move slowly, preventing the operating door 2 from moving too fast and generating a large kinetic energy, thereby avoiding damage to the operating door 2.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame, comprising a medium voltage cabinet body (1) and an operating door (2) installed on the upper part of the medium voltage cabinet body (1), characterized in that: The inner wall of the medium voltage cabinet body (1) is hinged with a spring rod assembly (3), the other end of the spring rod assembly (3) is hinged with a straight plate (4) for tilting, a straight groove (5) is provided inside the straight plate (4), a positioning block (6) is slidably connected inside the straight groove (5), a support block (7) is fixedly connected between one side of the positioning block (6) and the inner wall of the medium voltage cabinet body (1), an end of the straight groove (5) away from the positioning block (6) is provided with an inclined card slot (8), a side surface of the operating door (2) is fixedly installed with a limit member A (9) and a limit member B (10), an end of the straight plate (4) close to the operating door (2) is fixedly installed with a support block (11), the limit member B (10) is used to press the support block (11) in a horizontal state, and the limit member A (9) is used to press the support block (11) in an inclined state; A longitudinal guide rail (12) is fixedly installed on one side of the operating door (2), a transverse guide rail (13) is fixedly installed on the inner wall of the medium voltage cabinet body (1), a transverse plate A (14) and a transverse plate B (15) are slidably connected inside the transverse guide rail (13), an arc guide rail (16) is fixedly connected between the transverse plate A (14) and the transverse plate B (15), a limiting column (17) located inside the arc guide rail (16) is fixedly installed on one side of the straight plate (4), and one end of the transverse plate B (15) is slidably connected to the longitudinal guide rail (12).

2. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 1, characterized in that: The spring rod assembly (3) is arranged obliquely and is parallel to the inclined straight plate (4).

3. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 1, characterized in that: One end of the limiting member A (9) and the limiting member B (10) is cylindrical, and the distance between one end of the limiting member A (9) and the operating door (2) is greater than the distance between one end of the limiting member B (10) and the operating door (2).

4. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 1, characterized in that: The clamping slot (8) is located at an eccentric position of the straight plate (4).

5. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 1, characterized in that: The operating door (2) also includes a support plate (18) for pushing the support block (11), and the support plate (18) is located below the support block (11).

6. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 1, characterized in that: The limiting column (17) contacts the inner wall of the arc-shaped guide rail (16) and is used to slide along the arc-shaped guide rail (16).

7. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 1, characterized in that: The interior of the longitudinal guide rail (12) and one end of the transverse plate A (14) are both L-shaped, and the transverse plate A (14) is in contact with the longitudinal guide rail (12), and there is friction between the two.

8. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 1, characterized in that: A handle (19) is installed at the bottom of one side of the operating door (2).

9. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 1, characterized in that: The spring rod assembly (3) comprises a fixing block (301) for fixing to the inner wall of the medium voltage cabinet body (1), a connecting piece A (302) for being hinged to the fixing block (301), a connecting piece B (303) for being hinged to the straight plate (4), a spring and a telescopic rod (304) installed between the connecting piece A (302) and the connecting piece B (303), wherein two ends of the spring are respectively fixedly connected to the connecting piece A (302) and the connecting piece B (303).

10. A medium voltage switch cabinet low voltage secondary distribution room with a pull-down frame according to claim 9, characterized in that: The telescopic rod (304) comprises an insertion rod and a sleeve, the insertion rod and the sleeve are slidably connected, and there is friction resistance between the two, and one end of the insertion rod and the sleeve are fixedly connected to the connecting member A (302) and the connecting member B (303) respectively.

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