A hand-automatic high-voltage power distribution cabinet protection plate

Abstract

The application discloses a hand-automatic high-voltage power distribution cabinet protection pressing plate, which comprises a shell, a pressing plate assembly and a driving assembly. The shell is communicated at both ends. The pressing plate assembly comprises a pressing plate located in the shell, a movable rod located on the upper part of the pressing plate and a first electrode located on the upper part of the pressing plate. A second electrode is arranged in the shell and located on both sides of the first electrode. The driving assembly is rotationally arranged with the movable rod. On the basis of the traditional pressing plate, the use of the frequency converter can realize the input and cut-out of the differential protection in the protection pressing plate through the state signal point of the frequency converter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution cabinet, in particular to a hand-automatic high-voltage power distribution cabinet protection plate. BACKGROUND

[0002] At present, for coal-fired power plants, more future may be in lower power load and operating conditions, and the frequency control device of the main power rotating equipment is one of the ways to solve the low efficiency of rotating equipment and high power consumption under load, but it also derives the requirement of protection device matching modification for high-voltage power distribution device, which not only increases the modification cost, but also involves the modification of high-voltage power distribution cabinet secondary circuit, and also generates higher cost.

[0003] Based on this, a hand-automatic high-voltage power distribution cabinet protection plate is proposed to solve the above problems. SUMMARY

[0004] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] In view of the above and / or existing problems in the design of high-voltage power distribution cabinet pressure plate, the present application is proposed.

[0006] Therefore, one object of the present application is to provide a hand-automatic high-voltage power distribution cabinet protection plate, which, based on the traditional pressure plate, cooperates with the use of frequency converter, and realizes the input and output of differential protection in the protection plate through the state signal point of the frequency converter itself.

[0007] To solve the above technical problems, the present application provides the following technical scheme: a hand-automatic high-voltage power distribution cabinet protection plate, comprising a shell, a pressure plate assembly and a driving assembly, the shell is communicated at both ends, the pressure plate assembly comprises a pressure plate located in the shell, a movable rod located on the upper part of the pressure plate and a first electrode located on the upper part of the pressure plate, the shell is provided with a second electrode, the second electrode is located on both sides of the first electrode, and the driving assembly is rotatably arranged with the movable rod.

[0008] As a preferred scheme of the present application, wherein: the first electrode is in the shape of an I-beam, the first electrode is hollow, and the first electrode is sleeved on the pressure plate.

[0009] As a preferred scheme of the present application, wherein: the pressing plate is provided with a first connecting groove, the first connecting groove is arranged corresponding to the first contact, the first contact is sleeved on the pressing plate through the first connecting groove, and the first contact is arranged flush with the surface of the pressing plate.

[0010] As a preferred scheme of the present application, wherein: the second contact is in a C shape, the second contact is provided with a contact head at the upper portion, the shell is provided with a through hole, and the contact head extends to the outside of the shell through the through hole.

[0011] As a preferred scheme of the present application, wherein: the movable rod is two rods arranged symmetrically with respect to the axis of the pressing plate, the end of the movable rod away from the driving assembly is in a hook shape, the end of the movable rod is provided with a through groove, and the movable rod is sleeved on the pressing plate through the through groove.

[0012] As a preferred scheme of the present application, wherein: the pressing plate is provided with a second connecting groove, and the second connecting groove is arranged corresponding to the through groove.

[0013] As a preferred scheme of the present application, wherein: the driving assembly comprises a guide rod, a driving rod and a rotating disc, one end of the guide rod is rotationally connected with the movable rod, the other end of the guide rod is rotationally connected with the driving rod, the driving rod is provided with a sliding block at one end, and the driving rod is slidably connected with the rotating disc through the sliding block.

[0014] As a preferred scheme of the present application, wherein: the rotating disc is rotationally connected with a rotating shaft at the middle portion, the rotating disc is provided with two groups of first straight grooves, the two groups of first straight grooves are symmetrically arranged about the rotating shaft, and the sliding block is slidably connected with the first straight grooves.

[0015] As a preferred scheme of the present application, wherein: the rotating disc is provided with a bottom disc at the lower portion, the bottom disc is fixedly connected with the rotating shaft, the bottom disc is provided with a second straight groove, and the sliding block is slidably connected with the first straight groove and the second straight groove.

[0016] As a preferred scheme of the present application, wherein: the rotating disc is further provided with an arc-shaped groove at two ends of the first straight groove, and the arc-shaped groove is internally provided with a protrusion.

[0017] The present application has the advantages that: by changing the structure of the protection pressing plate on the high-voltage distribution cabinet, the protection pressing plate can realize the switching of the running state of the frequency converter itself without replacing the protection pressing plate, automatically put in and cut out the differential protection of the protection pressing plate, the protection pressing plate is flexible and has strong use performance. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0019] Figure 1 It is an exploded view of the pressing plate assembly and the shell of the present application.

[0020] Figure 2 It is a top view of the pressing plate assembly and the shell of the present application.

[0021] Figure 3 It is a structural view of the pressing plate of the present application.

[0022] Figure 4 It is a structural view of the movable rod of the present application.

[0023] Figure 5 It is a structural view of the first contact pole of the present application.

[0024] Figure 6 It is a structural view of the driving assembly of the present application. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0026] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0027] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" appearing in different places does not mean the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0028] Embodiment 1

[0029] Reference Figure 1This is the first embodiment of the present invention, which provides a manual / automatic integrated high-voltage distribution cabinet protection pressure plate, including a housing 100, a pressure plate assembly 200, and a drive assembly 300. The housing 100 serves as an external component, while the pressure plate assembly 200 is located inside the protector. The housing 100 is fixed to the user's high-voltage distribution cabinet and can be installed vertically or horizontally. When the pressure plate 201 is embedded inside the housing 100, the entire protection device of the protection pressure plate 201 is in the power frequency differential protection state. When the pressure plate 201 is cut out from the housing 100, the differential device is used to determine whether the frequency converter is engaged.

[0030] The housing 100 is connected at both ends. The pressure plate assembly 200 includes a pressure plate 201 located inside the housing 100, a movable rod 202 located on the upper part of the pressure plate 201, and a first contact pole 203 located on the upper part of the pressure plate 201. A second contact pole 204 is provided inside the housing 100. The second contact pole 204 is located on both sides of the first contact pole 203. The drive assembly 300 is rotatably configured with the movable rod 202.

[0031] The pressure plate 201 is made of type A high-strength plastic material, which has flame-retardant and explosion-proof properties. It is used for the operation of inserting and cutting the pressure plate 201. It also serves the movable rod 202, which is fixed on the pressure plate 201 and performs the insertion and cutting actions together with the pressure plate 201. The drive assembly 300 is used to convert its horizontal movement into the vertical movement of the movable rod 202, so that when the drive assembly 300 is activated, it drives the movable rod 202 to achieve the function of insertion and cutting.

[0032] Example 2

[0033] Reference Figures 1-6 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0034] The first contact 203 is I-shaped and hollow, and is sleeved on the pressure plate 201. The first contact 203 is used to connect the positive and negative terminals of the protection pressure plate 201 when the power frequency pressure plate is engaged. It is made of brass and has good conductivity.

[0035] The pressure plate 201 has a first connecting groove 201a, which corresponds to the first contact 203. The first contact 203 is fitted onto the pressure plate 201 through the first connecting groove 201a, and the first contact 203 is flush with the surface of the pressure plate 201. The first connecting groove 201a is used to fit the first contact 203 onto the pressure plate.

[0036] The second contact pole 204 is in a C shape, and a contact 204a is arranged at the upper portion of the second contact pole 204. The shell 100 is provided with a through hole, and the contact 204a extends to the outside of the shell 100 through the through hole. The second contact pole 204 is fixed inside the shell 100 and is made of brass, is used to contact the conductive element of the pressing plate 201 and realizes the communication of the circuit of the pressing plate 201 and the entire protection device, and two second contact poles 204 are arranged oppositely in a C shape.

[0037] The movable rod 202 is symmetrically arranged with respect to the axis of the pressing plate 201 and has two ends in a hook shape. A through slot 202a is arranged at the end of the movable rod 202, and the movable rod 202 is sleeved on the pressing plate 201 through the through slot 202a. The movable rod 202 has two ends in a hook shape, and the hook shape is a right-angle hook, which is used to realize the putting-in and cutting-out of the pressing plate 201.

[0038] The pressing plate 201 is provided with a second connecting slot 201b, and the second connecting slot 201b is arranged correspondingly to the through slot 202a. The second connecting slot 201b is used for sleeving the movable rod 202 on the pressing plate 201.

[0039] Embodiment 3

[0040] Reference Figures 1-6 This is the third embodiment of the present application, which is based on the previous embodiment.

[0041] The driving assembly 300 comprises a guide rod 301, a driving rod 302 and a rotating disc 303. One end of the guide rod 301 is rotationally connected with the movable rod 202, and the other end of the guide rod 301 is rotationally connected with the driving rod 302. The driving rod 302 is provided with a sliding block 304 at one end, and the driving rod 302 is slidably connected with the rotating disc 303 through the sliding block 304.

[0042] The guide rod 301 is made of brass and can keep the circuit connected during movement. The horizontal movement of the driving rod 302 is converted into the vertical movement of the movable rod 202 through the guide rod 301. The horizontal movement directions of the two driving rods corresponding to the two movable rods 202 are arranged oppositely, that is, the two driving rods 302 are arranged close to each other or at the same time, so that the movable rod 202 can realize the putting-in and cutting-out of the pressing plate 201. The driving rod 302 is filled with an insulating material. According to the putting-in and cutting-out state of the pressing plate 201, the driving rod 302 can be switched to the frequency conversion state contact isolation and the frequency conversion state contact connection state. The guide rod 301 and the driving rod 302 are rotationally connected through a stud, and the contact area between the movable rod 202, the guide rod 301 and the driving rod 302 is not less than 12 mm, which can effectively keep the circuit connected during mutual movement. 2 ,

[0043] The middle part of the rotating disc 303 is rotationally connected with the rotating shaft 305, the rotating disc 303 is provided with two groups of first linear grooves 303a, the two groups of first linear grooves 303a are symmetrically arranged about the rotating shaft 305, and the sliding block 304 is slidingly connected with the first linear groove 303a. The rotating disc 303 is used for driving the two driving rods 302 to simultaneously complete relative linear motion in the horizontal direction, so as to realize the vertical motion of the movable rod 202, so as to realize the functions of the pressing plate 201 being put into and cut out. The rotating disc 303 is rotationally connected with the rotating shaft 305, the two first linear grooves 303a are mirror-symmetric about the rotating shaft 305, the sliding block 304 at one end of the driving rod 302 is inside the first linear groove 303a, when the rotating disc 306 rotates, the sliding block 304 slides in the first linear groove 303a, and the movement trajectories of the two sliding blocks 304 corresponding to the two driving rods 302 in the two first linear grooves 303a are opposite, and the simultaneous motion of the driving rod 302 can be realized through the rotating disc 306.

[0044] The lower part of the rotating disc 303 is provided with a bottom disc 306, the bottom disc 306 is fixedly connected with the rotating shaft 305, the bottom disc 306 is provided with a second linear groove 306a, and the sliding block 304 is slidingly connected with the first linear groove 303a and the second linear groove 306a. The bottom disc 306 is fixed when the rotating disc 303 rotates, the sliding block 304 penetrates through the first linear groove 303a and the second linear groove 306a, and the sliding block 304 slides in the first linear groove 303a and the second linear groove 306a, that is, the movement trajectory of the sliding block 304 is the overlapping part of the first linear groove 303a and the second linear groove 306a when the rotating disc 303 rotates, the second linear groove 306a is used for limiting the movement trajectory of the sliding block 304, so that the movement of the two sliding blocks 304 can only be when the rotating disc 303 rotates, the two driving rods 302 can realize the functions of relatively approaching or relatively moving away, and when the two driving rods 302 relatively approach or relatively move away, they are coaxial due to the limiting of the second linear groove 306a, at this time, when the rotating disc 303 rotates clockwise, the sliding block 304 slides in the first linear groove 303a and the second linear groove 306a, the two driving rods 302 relatively move away, at this time, the movable rod 202 is pulled down, and the pressing plate 201 is cut out of the shell 100, when the rotating disc 303 rotates counterclockwise, the sliding block 304 slides in the first linear groove 303a and the second linear groove 306a, the two driving rods 302 relatively approach, at this time, the movable rod 202 is lifted up, and the pressing plate 201 is put into the shell 100.

[0045] The rotating disc 303 is further provided with an arc-shaped slot 303b at both ends of the first straight slot 303a, and the arc-shaped slot 303b is internally provided with a protrusion 307. The arc-shaped slot 303b and the protrusion 307 are used for limiting the sliding block 304, the radius of the circle where the arc-shaped slot 303b is located is taken as the origin of the midpoint of the rotating shaft 305, the length of the first straight slot 303a is consistent with the path length of the pressing plate required to be put in and cut out, when the rotating disc 303 rotates to the arc-shaped slot 303b at one end of the first straight slot 303a where the sliding block 304 moves to, at this time, the sliding block 304 cannot continue to move due to the setting of the arc-shaped slot 303b, so that the rotating disc 303 stops rotating, which means that the movable rod 202 moves to the position at this time, and the pressing plate 201 is in the state of cutting out or putting in. The arc-shaped slot 303b is internally provided with a cavity, the cavity is internally provided with a spring, one end of the spring is fixedly connected with the protrusion 307, the protrusion 307 slides in the cavity, when the sliding block 304 moves to the junction of the first straight slot 303a and the arc-shaped slot 303b, the sliding block 304 extrudes the protrusion 307 so that the spring is contracted, the outer edge of the protrusion 307 is arc-shaped, the middle part of the protrusion 307 is concave, the sliding block 304 is limited and fixed through the concave part of the protrusion 307, at this time, the spring and the protrusion 307 fix the sliding block, so as to achieve the function of fixing the rotating disc 303, so that the rotating disc 303 will not rotate due to accidental touch, and a certain force needs to be given to the rotating disc 303 to make the sliding block 304 separate from the protrusion 307, so that the pressing plate 201 is converted to another state.

[0046] Working principle:

[0047] The induced draft fan of a certain 350MW unit in China is a movable blade adjustable axial flow fan. In order to improve the operation efficiency of the fan under medium and low load and peak load, a frequency conversion speed regulating device is added to the fan, but the original comprehensive protection device is not replaced.

[0048] Through the transformation of the protection pressing plate 201 of the power distribution cabinet, when the protection pressing plate 201 is pulled out, the differential protection is put in under the power frequency state at this time, and the protection pressing plate 201 cannot accept the signal state from the frequency converter under this state; when the protection pressing plate 201 is pressed in, the operation is under the frequency conversion state at this time, when the frequency converter operates, the operation signal is sent to the protection pressing plate 201, and the differential protection device is withdrawn. Once the frequency converter fails, the automatic bypass is switched to the bypass operation, at this time, the protection pressing plate 201 is automatically cut out, and the differential protection is automatically put in.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A manual / automatic integrated high-voltage distribution cabinet protection pressure plate, characterized in that: The utility model relates to a shell (100) is provided with two ends communication, the pressing plate subassembly (200) is provided with the pressing plate (201) in the shell (100) inside, the movable rod (202) and the first anode (203) of the movable rod (202) are provided with in the pressing plate (201) upper portion, the shell (100) inside is equipped with the second anode (204), and the second anode (204) is equipped with in the first anode (203) both sides, the drive subassembly (300) is provided with the movable rod (202) rotation, the first anode (203) is I -shaped, and the first anode (203) is hollowly provided, and the first anode (203) is set up in the pressing plate (201), and the pressing plate (201) is equipped with first connecting groove (201a), and first connecting groove (201a) is provided with the first anode (203) correspondingly, and the first anode (203) is set up in the pressing plate (201) through first connecting groove (201a), and the first anode (203) is flush with the surface of the pressing plate (201) and is provided, the second anode (204) is C-shaped, and the second anode (204) is equipped with contact head (204a) in upper portion, and the shell (100) is equipped with through -hole, and the contact head (204a) extends to the shell (100) outside through through -hole, The movable rod (202) is two with the axis symmetry of the pressing plate (201) and is provided, and the end of the movable rod (202) is away from the drive subassembly (300) and is hook-shaped, and the end of the movable rod (202) is equipped with through -groove (202a), and the movable rod (202) is set up in the pressing plate (201) through through -groove (202a), The pressing plate (201) is equipped with second connecting groove (201b), and second connecting groove (201b) is provided with through -groove (202a) correspondingly, The drive subassembly (300) includes guide rod (301), drive rod (302) and rotating disc (303), one end of guide rod (301) is rotatably connected with movable rod (202), the other end of guide rod (301) is rotatably connected with drive rod (302), one end of drive rod (302) is provided with sliding block (304), and drive rod (302) is slidably connected with rotating disc (303) through sliding block (304), The middle part of rotating disc (303) is rotatably connected with rotating shaft (305), and rotating disc (303) is equipped with two groups of first linear grooves (303a), and two groups of first linear grooves (303a) are symmetrically arranged about rotating shaft (305), and sliding block (304) is slidably connected with first linear grooves (303a). ​ ​ ​ ​ ​ The lower part of the rotating disc (303) is provided with a bottom disc (306), the bottom disc (306) is fixedly connected with the rotating shaft (305), the bottom disc (306) is provided with a second linear groove (306a), the sliding block (304) is slidably connected with the first linear groove (303a) and the second linear groove (306a); the rotating disc (303) is further provided with an arc-shaped groove (303b) located at both ends of the first linear groove (303a), the arc-shaped groove (303b) is internally provided with a protrusion (307); The arc-shaped groove (303b) is internally provided with a cavity, the cavity is internally provided with a spring, one end of the spring is fixedly connected with the protrusion (307), the protrusion (307) slides in the cavity, when the sliding block (304) moves to the junction of the first linear groove (303a) and the arc-shaped groove (303b), the sliding block (304) extrudes the protrusion (307) to make the spring contract, the outer edge of the protrusion (307) is arc-shaped, the middle part of the protrusion (307) is concave, the sliding block (304) is fixedly limited through the concave part of the protrusion (307), at this time, the spring and the protrusion (307) fix the sliding block, so as to fix the rotating disc (303), the rotating disc (303) will not rotate due to accidental touch, a certain force needs to be given to the rotating disc (303) to make the sliding block (304) separate from the protrusion (307), and then the pressing plate (201) is converted to another state.

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