An isolating switch

Abstract

The present invention belongs to the technical field of electrical equipment, and discloses an isolating switch. The isolating switch includes a first mounting seat and a second mounting seat spaced apart on a base, a static contact is arranged on the first mounting seat, one end of the moving contact is hinged to the second mounting seat, so that the other end of the moving contact can contact or separate from the static contact, and the isolating switch also includes a shielding member and an identification member, one of the shielding member and the identification member is arranged on the first mounting seat, and the other is arranged on the moving contact, and a window is arranged on the shielding member, and the identification member can face the window on the shielding member when the moving contact and the static contact are in contact. The isolating switch provided by the present invention, when the isolating switch is in a closed state, the identification member can face the window of the shielding member, and it can be directly observed on the ground whether the isolating switch is closed in place, and the isolating switch has a simple structure and is easy to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to an isolating switch. Background Art

[0002] Isolating switches generally refer to switching devices used to control the on and off of high-voltage circuits above 10KV. Due to their simple structure and relatively stable operation, they are the most widely used type of high-voltage switching devices, especially in substations and power plants.

[0003] The structures of the isolating switches on the market are basically the same, including a base, a first post insulator and a second post insulator respectively fixed at both ends of the base, an incoming line board and an outgoing line board respectively fixed on the upper ends of the first post insulator and the second post insulator, and a knife switch. One end of the knife switch is hinged to the incoming line board, and the other end of the knife switch can be slidably connected to the outgoing line board. The isolating switch can realize the connection and disconnection between the incoming line board and the outgoing line board by swinging the knife switch to open and close.

[0004] After the isolating switch is installed on the outdoor mounting frame, the installation position of the isolating switch is far from the ground. During the opening and closing process, the isolating switch may not be closed properly because the transmission mechanism of the isolating switch connector is stuck or does not run smoothly. This causes poor contact between the knife switch and the outlet board, making the entire line current unstable. It is difficult to observe whether the isolating switch is closed properly with the naked eye on the ground. Therefore, each time the isolating switch is closed, a remote observation device is required to observe whether the switch is closed properly, or the operator uses a detection device to detect the circuit current to determine whether the isolating switch is closed properly. The operation process is cumbersome, time-consuming and labor-intensive.

[0005] Therefore, there is an urgent need for an isolating switch to solve the problems in the prior art. Summary of the invention

[0006] The object of the present invention is to provide an isolating switch, which can solve the problem in the prior art that it is not easy to directly observe whether a moving contact is in contact with a static contact after the isolating switch is closed.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A disconnector comprises a base, a static contact and a moving contact, wherein a first mounting seat and a second mounting seat are arranged at intervals on the base, the static contact is arranged on the first mounting seat, and one end of the moving contact is hinged to the second mounting seat so that the other end of the moving contact can contact or separate from the static contact. The disconnector also comprises a shielding member and an identification member, one of which is arranged on the first mounting seat, and the other is arranged on the moving contact, a window is arranged on the shielding member, and the identification member is configured to be directly opposite to the window when the moving contact and the static contact are in contact.

[0009] Optionally, the identification member includes an identification head and an identification rod, one end of the identification rod is detachably connected to the moving contact, the other end of the identification rod is detachably connected to the identification head, the shielding member is arranged on the first mounting seat, and the identification head can be opposite to the window.

[0010] Optionally, the logo head is covered with a reflective layer.

[0011] Optionally, the shielding member includes a first shielding member and a second shielding member, the first shielding member and the second shielding member are relatively arranged on the first mounting seat, a receiving groove matching the identification member is formed between the first shielding member and the second shielding member, and the window is arranged on the first shielding member and / or the second shielding member.

[0012] Optionally, the isolating switch further comprises an operating pull ring, and the operating pull ring is detachably arranged at an end of the moving contact away from the second mounting seat.

[0013] Optionally, the operating pull ring is connected to the moving contact by snapping or bolting.

[0014] Optionally, the operating pull ring includes:

[0015] A self-locking hook, wherein the self-locking hook is provided with an opening;

[0016] A movable locking member, one end of which is hinged to any end of the opening, and the other end of which can abut against an end of the opening not connected to the movable locking member;

[0017] A reset elastic member is arranged between the self-locking hook and the movable locking member, and the reset elastic member is configured to drive the movable locking member to rotate from the inner side to the outer side of the opening to abut against the self-locking hook.

[0018] Optionally, the resetting elastic member is a spring, one end of the spring abuts against the self-locking hook, and the other end of the spring abuts against the movable locking member.

[0019] Optionally, the operating pull ring is made of metal material, and an anti-oxidation layer is provided on the surface of the operating pull ring.

[0020] Optionally, a limiting device is further provided on the first mounting seat, and the limiting device is configured to limit the distance between the moving contact and the first mounting seat when the moving contact and the static contact are in contact.

[0021] Beneficial effects:

[0022] The isolating switch provided by the present invention is provided with an identification piece on the moving contact and a shielding piece on the first mounting seat. When the isolating switch is in a closed state, the identification piece can be directly opposite to the window of the shielding piece, so that it can be directly observed on the ground whether the isolating switch is closed, thereby improving the accuracy of judging whether the isolating switch is closed. The isolating switch has a simple structure, low cost and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the isolating switch provided by the present invention;

[0024] Figure 2 It is a structural schematic diagram of a top view of a moving contact provided by the present invention;

[0025] Figure 3 It is a structural schematic diagram of a top view of the first mounting frame provided by the present invention.

[0026] In the figure:

[0027] 1. base; 11. first mounting seat; 111. static contact; 112. first support insulator; 113. first terminal block; 12. second mounting seat; 121. moving contact; 122. second support insulator; 123. second terminal block;

[0028] 2. shielding member; 21. first shielding member; 22. second shielding member; 23. window;

[0029] 3. Identification piece; 31. Identification head; 32. Identification rod;

[0030] 4. Operating pull ring; 41. Self-locking hook; 42. Movable locking piece. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] Embodiment 1

[0036] Isolating switch is a switching device mainly used for isolating power supply, switching operation, and connecting and disconnecting circuit current. When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its working principle and structure are relatively simple, but due to its large usage and high working reliability requirements, it has a great impact on the design, construction and safe operation of substations and power plants.

[0037] As the number of times the disconnector is opened and closed increases, the rotating mechanism of the disconnector knife will wear out, causing the rotating mechanism to jam during rotation, or the gap between the knife switch and the rotating mechanism to increase, causing the knife switch to not be fully closed or over-closed after closing. The outdoor disconnector is installed at a height far from the ground, and it is difficult to observe whether the disconnector is fully closed with the naked eye. High-precision observation equipment is required to observe the closure of the knife switch, or the current of the circuit is measured to determine whether the knife switch is completely closed. The operation process of these two detection methods is cumbersome, time-consuming and labor-intensive.

[0038] In order to solve the problems in the prior art, such as Figure 1 As shown, this embodiment provides an isolating switch, including a base 1, a static contact 111 and a moving contact 121. A first mounting seat 11 and a second mounting seat 12 are arranged on the base 1 at intervals. The static contact 111 is arranged on the first mounting seat 11, and one end of the moving contact 121 is hinged to the second mounting seat 12 so that the other end of the moving contact 121 can contact or separate from the static contact 111, so as to ensure that the isolating switch can realize the on and off of the entire circuit through closing and opening operations. The isolating switch also includes a shielding member 2 and an identification member 3. The shielding member 2 is arranged on the first mounting seat 11, and a window 23 is opened on the shielding member 2. The identification member 3 is arranged on the moving contact 121, and the identification member 3 can be opposite to the window 23 on the shielding member 2 when the moving contact 121 and the static contact 111 are in contact. In this way, when the isolating switch is closed, the relative position of the identification member 3 and the shielding member 2 can be observed to see whether the identification member 3 is opposite to the window 23 of the shielding member 2, so as to judge whether the moving contact 121 and the static contact 111 of the isolating switch are in contact. The isolating switch has a simple structure, low cost and easy operation.

[0039] like Figure 1 As shown, the first mounting seat 11 includes a first post insulator 112 and a first terminal block 113, the first post insulator 112 is vertically mounted on the base 1, the first terminal block 113 is installed at one end of the first post insulator 112 away from the base 1, and the first terminal block 113 is provided with a shielding member 2 and a static contact 111, the second mounting seat 12 includes a second post insulator 122 and a second terminal block 123, the second post insulator 122 is vertically mounted on the base 1, the second terminal block 123 is provided at one end of the second post insulator 122 away from the base 1, and a mounting plate is provided on the second terminal block 123, one end of the moving contact 121 is rotatably connected to the mounting plate, and an identification member 3 is provided at one end of the moving contact 121 away from the second mounting seat 12.

[0040] Because the installation position of the isolating switch is far from the ground, when the operator needs to perform the opening and closing operation, he needs to climb to a higher position with a ladder, which is inconvenient to operate and has certain safety hazards. In order to solve the above problems, an operating pull ring 4 is provided on the moving contact 121. The operating pull ring 4 is connected to the moving contact 121 in a detachable connection manner and is located on the side of the moving contact 121 away from the base 1 in the width direction, so as to facilitate the manual opening and closing operation using the operating rod.

[0041] Optionally, the operating pull ring 4 is connected to the moving contact 121 by clamping or bolting, which facilitates the replacement and maintenance of the operating pull ring 4. In this embodiment, the operating pull ring 4 is preferably fixed by bolts, which have strong fastness and can improve the firmness of the connection between the operating pull ring 4 and the moving contact 121.

[0042] Optionally, the operating pull ring 4 includes a self-locking hook 41, a movable locking member 42 and a reset elastic member (not shown in the figure), the self-locking hook 41 is provided with an opening, one end of the movable locking member 42 is hinged to one end of the opening, the other end of the movable locking member 42 can abut against an end of the opening that is not connected to the movable locking member 42, the reset elastic member is provided between the self-locking hook 41 and the reset elastic member, the reset elastic member can drive the free end of the movable locking member 42 to rotate from the inside to the outside of the opening so as to abut against the self-locking hook 41 to lock the opening.

[0043] It can be understood that when it is necessary to use the operating rod to open and close the disconnecting switch, the working end of the operating rod first abuts against the outer side of the movable locking member 42, and then a force is applied to the operating rod in the direction of the self-locking hook 41. The working end of the operating rod will directly push the free end of the movable locking member 42 and slide into the self-locking hook 41. The movable locking member 42 will quickly reset under the elastic force of the reset elastic member, locking the opening of the self-locking hook 41, so that the working end of the operating rod is not easy to fall out of the self-locking hook 41. The device has a simple structure and is convenient for manual opening and closing of the disconnecting switch.

[0044] Optionally, the resetting elastic member is a spring, one end of the spring abuts against the self-locking hook 41 , and the other end of the spring abuts against the movable locking member 42 .

[0045] Optionally, the operating pull ring 4 is made of metal material to improve the strength of the operating pull ring 4 , and an anti-oxidation layer is provided on the surface of the operating pull ring 4 to prevent the operating pull ring 4 from being oxidized, thereby increasing the service life of the operating pull ring 4 .

[0046] Furthermore, the surface of the operating pull ring 4 is galvanized. The chemical property of zinc is stable, and the corrosion resistance of the operating pull ring 4 can be improved.

[0047] like Figure 2As shown, the identification member 3 includes an identification head 31 and an identification rod 32. One end of the identification rod 32 is detachably connected to an end of the moving contact 121 away from the second mounting seat 12, and the other end of the identification rod 32 is detachably connected to the identification head 31. The identification member 3 and the moving contact 121 are connected by a detachable connection method, which reduces the volume of the moving contact 121 during transportation and also facilitates the replacement and maintenance of the identification member 3.

[0048] Optionally, both ends of the identification rod 32 are provided with external threads, the identification head 31 and the moving contact 121 are provided with internal threads respectively, and the identification rod 32 is connected to the moving contact 121 and the identification head 31 respectively through the threads.

[0049] In other embodiments, the identification member 3 can be integrally formed with the moving contact 121 , which simplifies the production process and can improve the production efficiency of the moving contact 121 .

[0050] Optionally, in order to enhance the observability of the identification head 31, a reflective layer is covered on the outer surface of the identification head 31, so that the identification member 3 can be more easily observed, thereby improving the accuracy of the power maintenance personnel's judgment on whether the disconnector is closed properly.

[0051] Furthermore, the reflective layer can be a reflective film, reflective ink, reflective marking paint, reflective cloth, etc. In this embodiment, the outer surface of the logo head 31 is preferably coated with reflective marking paint, which is resistant to high temperature and corrosion, and can extend the service life of the logo head 31.

[0052] like Figure 3 As shown, the shielding member 2 includes a first shielding member 21 and a second shielding member 22, and the first shielding member 21 and the second shielding member 22 are relatively arranged on the mounting seat, and a receiving groove for receiving the identification head 31 is formed between the first shielding member 21 and the second shielding member 22, and windows 23 are respectively arranged on the first shielding member 21 and the second shielding member 22. When the moving contact 121 and the static contact 111 are in contact, the identification head 31 is located in the receiving groove, and the identification head 31 and the window 23 on the shielding member 2 are opposite to each other. The power maintenance personnel on the ground can directly determine whether the moving contact 121 and the static contact 111 are in contact by observing the relative position of the identification head 31 and the window 23.

[0053] Furthermore, in this embodiment, a first semi-cylindrical groove is provided on the first shielding member 21, and a first viewing window is provided on the side of the first groove; a second semi-cylindrical groove opposite to the first groove is provided on the second shielding member 22, and a second viewing window opposite to the first viewing window is provided on the side of the second groove; the marking head 31 is configured to be in the shape of a sphere, which can increase the visible area of ​​the marking head 31 in the viewing window 23, so that the marking head 31 can be more easily observed.

[0054] In other embodiments, a window 23 may be provided on either the first shielding member 21 or the second shielding member 22, or only the first shielding member 21 or the second shielding member 22 may be provided. There is no specific limitation on the shape of the shielding member 2 and the number of the shielding members 2, as long as the relative position of the identification head 31 and the window 23 can be observed through the shielding member 2.

[0055] In other embodiments, the shielding member 2 and the static contact 111 may be produced by an integrated molding process, which may simplify the process flow and improve production efficiency.

[0056] Optionally, a limiting device is also provided on the first mounting seat 11, which can limit the distance between the moving contact 121 and the first mounting seat 11 when the moving contact 121 and the static contact 111 are in contact. This can avoid the situation of over-closing and make the current of the circuit more stable.

[0057] Furthermore, the limiting device is a limiting block, which is fixed to the first mounting seat 11 by bolts, so as to facilitate the installation and removal of the limiting block. When the moving contact 121 and the static contact 111 are in contact, the moving contact 121 abuts against the limiting block, limiting the further rotation of the moving contact 121, so as to avoid the over-closing situation.

[0058] Embodiment 2

[0059] This embodiment provides an isolating switch, which is different from the first embodiment in that an identification member 3 is provided on the first mounting seat 11, and the identification member 3 is slidably connected to the first mounting seat 11 through a sliding mechanism, and the sliding mechanism is also provided with a locking member, which can lock the identification member 3 so that the positions of the identification member 3 and the first mounting seat 11 are relatively fixed. A shielding member 2 is provided at one end of the moving contact 121 away from the second mounting seat 12, and a window 23 is provided on the shielding member 2. After the moving contact 121 and the static contact 111 are in contact, the window 23 of the shielding member 2 can face the identification member 3.

[0060] Optionally, the sliding mechanism includes a slide rail and a slide table. The slide rail is ring-arranged around the static contact. The slide table is slidably connected to the slide rail. The identification member 3 is fixedly connected to the slide table. The identification member 3 can slide on the slide rail together with the slide table, so that when the installation position of the isolating switch is different, the identification member 3 can slide to a position suitable for observation.

[0061] Furthermore, a locking member is also provided on the slide to lock the identification member 3 when the identification member 3 slides into place, so that the relative position of the identification member 3 and the slide rail is fixed. The locking member includes a locking nut and a locking screw. A locking hole is provided on the slide perpendicular to the direction of the slide rail. The locking nut is coaxially arranged with the locking hole. The locking screw is screwed together with the locking nut. By manually rotating the locking screw, the locking screw can be moved closer to or away from the slide rail. When the locking screw abuts against the slide rail, the relative position of the identification member 3 and the slide rail can be kept unchanged. The sliding mechanism and locking member provided in this embodiment are simple in structure and easy to install.

[0062] In this embodiment, the identification member 3 is slidably connected to the first mounting seat 11 through a sliding mechanism. According to the different installation positions of the isolating switch, the identification member 3 can be slid to a suitable observation position through the sliding mechanism, and the identification member 3 is locked on the first mounting seat 11 through a locking member. The shielding member 2 is fixed on the moving contact 121 opposite to the identification member 3. When the moving contact 121 and the static contact 111 of the isolating switch are in contact, the window 23 on the shielding member 2 is opposite to the identification member 3, which improves the applicability and practicality of the isolating switch and facilitates the judgment of whether the isolating switch is in place.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An isolating switch, comprising a base (1), a stationary contact (111) and a moving contact (121), wherein a first mounting seat (11) and a second mounting seat (12) are arranged on the base (1) at intervals, the stationary contact (111) is arranged on the first mounting seat (11), and one end of the moving contact (121) is hinged to the second mounting seat (12) so that the other end of the moving contact (121) can contact or separate from the stationary contact (111), characterized in that: The isolating switch further comprises a shielding member (2) and an identification member (3), one of the shielding member (2) and the identification member (3) being arranged on the first mounting seat (11), and the other being arranged on the moving contact (121), the shielding member (2) being provided with a window (23), and the identification member (3) being configured to face the window (23) when the moving contact (121) and the stationary contact (111) are in contact with each other; The identification member (3) comprises an identification head (31) and an identification rod (32); one end of the identification rod (32) is detachably connected to the moving contact (121); the other end of the identification rod (32) is detachably connected to the identification head (31); the shielding member (2) is arranged on the first mounting seat (11); and the identification head (31) can face the viewing window (23); The shielding member (2) comprises a first shielding member (21) and a second shielding member (22); the first shielding member (21) and the second shielding member (22) are arranged on the first mounting seat (11) relative to each other; a receiving groove matching the identification member (3) is formed between the first shielding member (21) and the second shielding member (22); and the first shielding member (21) and / or the second shielding member (22) are provided with the viewing window (23); The first shielding member (21) is provided with a first semi-cylindrical groove, a first viewing window is provided on the side of the first groove, the second shielding member (22) is provided with a second semi-cylindrical groove opposite to the first groove, a second viewing window is provided on the side of the second groove opposite to the first viewing window, and the marking head (31) is provided in the shape of a sphere.

2. The isolating switch according to claim 1, characterized in that: The marking head (31) is covered with a reflective layer.

3. The isolating switch according to claim 1, characterized in that: The isolating switch further comprises an operating pull ring (4), wherein the operating pull ring (4) is detachably arranged at an end of the moving contact (121) away from the second mounting seat (12).

4. The isolating switch according to claim 3, characterized in that: The operating pull ring (4) is connected to the moving contact (121) by means of snap connection or bolts.

5. The isolating switch according to claim 3, characterized in that: The operating pull ring (4) comprises: A self-locking hook (41), wherein the self-locking hook (41) is provided with an opening; A movable locking member (42), one end of which is hinged to any end of the opening, and the other end of which can abut against an end of the opening not connected to the movable locking member (42); A reset elastic member is arranged between the self-locking hook (41) and the movable locking member (42), and the reset elastic member is configured to drive the movable locking member (42) to rotate from the inside to the outside of the opening so as to abut against the self-locking hook (41).

6. The isolating switch according to claim 5, characterized in that: The resetting elastic member is a spring, one end of which abuts against the self-locking hook (41), and the other end of which abuts against the movable locking member (42).

7. The isolating switch according to claim 3, characterized in that: The operating pull ring (4) is made of a metal material, and an anti-oxidation layer is provided on the surface of the operating pull ring (4).

8. The isolating switch according to any one of claims 1 to 7, characterized in that: A limiting device is also provided on the first mounting seat (11), and the limiting device is configured to limit the distance between the moving contact (121) and the first mounting seat (11) when the moving contact (121) and the stationary contact (111) are in contact.

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