Vacuum Circuit Breaker and Inlet / Outlet Line Structure of Solidly Enclosed Pole

Abstract

The present invention relates to a vacuum circuit breaker and an incoming and outgoing line structure of a solid-sealed pole column. The incoming and outgoing line structure of the solid-sealed pole column includes a solid-sealed pole column, which includes an incoming line port, an outgoing line port, an incoming line connection seat, and an outgoing line connection seat; the incoming line connection seat is arranged corresponding to the incoming line port, and the outgoing line connection seat is arranged corresponding to the outgoing line port; inserts are arranged on the inner walls of the incoming line port and the outgoing line port, and the inserts have internal threads; a conductive column, the conductive column includes a first external thread at the bottom, a second external thread in the middle, and a plugging structure at the top; the first external thread is used for threaded connection with the corresponding incoming line connection seat or outgoing line connection seat; the second external thread is used for threaded connection with the internal thread of the corresponding insert; the plugging structure is used for plugging and matching with the corresponding outgoing line bushing in the vacuum circuit breaker. By means of two threaded connections, radial movement or yaw of the conductive column during use is avoided, and the two threaded connections are achieved through one screwing operation, which is convenient to operate and has high assembly efficiency.

Description

Technical Field

[0001] The present invention relates to a vacuum circuit breaker and an incoming and outgoing line structure of a solid-sealed pole column. Background Art

[0002] The circuit breakers installed on outdoor substations and utility poles can be divided into two types, namely sulfur hexafluoride circuit breakers and vacuum circuit breakers. Sulfur hexafluoride circuit breakers use sulfur hexafluoride gas as the insulating medium, and sulfur hexafluoride gas is a harmful gas. Once leaked, it will pollute the environment. Therefore, vacuum circuit breakers are mostly used on outdoor substations and utility poles now.

[0003] The vacuum circuit breaker includes a housing and three solid-sealed pole columns. The solid-sealed pole columns are arranged inside the housing and have vacuum arc extinguishing chambers. The vacuum arc extinguishing chamber includes a moving end and a static end. The solid-sealed pole column also includes an outgoing line connection seat corresponding to the outgoing line port and an incoming line connection seat corresponding to the incoming line port. The moving end is fixedly connected to the outgoing line connection seat, and the static end is fixedly connected to the incoming line connection seat. The outgoing line connection seat is electrically connected to the moving end outgoing line bushing, and the incoming line connection seat is electrically connected to the static end outgoing line bushing. The static end outgoing line bushing and the moving end outgoing line bushing are used for connecting corresponding cables. The vacuum circuit breaker also includes an operating mechanism, and the operating mechanism drives the moving end of the vacuum arc extinguishing chamber to act so that the moving end and the static end of the vacuum arc extinguishing chamber are separated and combined to realize the on-off of the circuit. The structure of the vacuum circuit breaker with an internal solid-sealed pole column is as disclosed in a Chinese utility model patent with the authorization announcement number CN203103206U and the authorization announcement date of July 31, 2013, which is an outdoor vacuum circuit breaker with solid insulation. This vacuum circuit breaker has the characteristics of good insulation performance, high sealing performance, and high reliability because the solid-sealed pole column is arranged inside the housing.

[0004] The connection form between the moving end of the vacuum arc extinguishing chamber and the moving end outgoing line bushing in the vacuum circuit breaker with an internal solid-sealed pole column is as follows: The outgoing line connection seat is connected to the moving end outgoing line bushing through a conductive column and a finger. The specific connection form is: The conductive column includes a screw and a nut threadedly connected to the screw. The finger is arranged on the nut. A receiving hole is coaxially arranged on the outgoing line bushing, and a threaded hole is arranged on the outgoing line connection seat. The screw is fixed to the outgoing line connection seat through threaded connection with the threaded hole, and the finger on the nut contacts the hole wall of the receiving hole. The electrical connection between the moving end outgoing line bushing and the outgoing line connection seat is realized through the above structure. The connection form between the incoming line connection seat and the static end outgoing line bushing is similar to the form between the outgoing line connection seat and the moving end outgoing line bushing, and will not be elaborated here.

[0005] The assembly process of the conductive post is as follows: Turn the screw to fix the conductive post on the outgoing line connection base or the incoming line connection base. However, relying solely on the threaded connection between the screw and the corresponding outgoing line connection base or incoming line connection base cannot ensure that the conductive post will not generate radial yaw or offset during use. Therefore, it is necessary to turn the nut so that the nut is pressed against the edge of the outgoing line opening or the incoming line opening of the fixed pole column. The frictional force between the nut and the fixed-sealed pole column is used to prevent the conductive post from generating radial movement during the use of the vacuum circuit breaker, and the blocking effect between the nut and the fixed-sealed pole column is used to prevent the conductive post from generating yaw. Through the cooperation between the nut and the edge of the corresponding outgoing line opening or incoming line opening and the threaded connection between the screw and the corresponding outgoing line connection base or incoming line connection base, the coaxiality of the conductive post and the outgoing line sleeve is ensured, thereby ensuring reliable contact between the contact finger and the wall of the receiving hole.

[0006] However, this positioning method requires two turns of screwing for the installation of the conductive post, which is inconvenient to operate and has low assembly efficiency. Summary of the Invention

[0007] The purpose of the present invention is to provide a fixed-sealed pole column outgoing line structure to solve the problem that the installation of the conductive post requires two screwing operations, which is inconvenient to operate and has low assembly efficiency. Another purpose of the present invention is to provide a vacuum circuit breaker to solve the problem that the installation of the conductive post requires two screwing operations, which is inconvenient to operate and has low assembly efficiency.

[0008] To achieve the above purpose, the technical solution of the fixed-sealed pole column outgoing line structure in the present invention is: The fixed-sealed pole column incoming and outgoing line structure includes

[0009] A fixed-sealed pole column, including an incoming line opening, an outgoing line opening, an incoming line connection base, and an outgoing line connection base;

[0010] The incoming line connection base is arranged corresponding to the incoming line opening, and the outgoing line connection base is arranged corresponding to the outgoing line opening;

[0011] Inserts are arranged on the inner walls of the incoming line opening and the outgoing line opening, and the inserts have internal threads;

[0012] A conductive post, the conductive post includes a first external thread at the bottom, a second external thread in the middle, and a plug-in structure at the top;

[0013] The first external thread is used for threaded connection with the corresponding incoming line connection base or outgoing line connection base;

[0014] The second external thread is used for connection with the internal thread of the corresponding insert;

[0015] The plug-in structure is used for plug-in cooperation with the corresponding outgoing line sleeve in the vacuum circuit breaker.

[0016] The beneficial effects of the outgoing line structure of the solid-sealed pole column in the present invention are as follows: The first external thread is threadedly connected to the corresponding incoming line connection seat or outgoing line connection seat, and the second external thread is threadedly connected to the internal thread of the insert in the corresponding incoming line port or outgoing line port. By means of these two threaded connections, radial movement or yaw of the conductive column during use can be avoided. The two threaded connections are achieved through a single screwing operation, which is convenient for operation and has high assembly efficiency.

[0017] Further, the radial dimension of the conductive column at the second external thread is larger than the radial dimension of the conductive column at the first external thread.

[0018] The advantage thereof is to avoid interference between the first external thread and the insert during installation.

[0019] Further, the radial dimension of the conductive column at the plugging structure is larger than the radial dimension of the conductive column at the second external thread.

[0020] The advantage thereof is that the radial dimension at the plugging structure is relatively large, which can avoid interference of parts other than the plugging structure with the contact between the conductive column and the outgoing line sleeve.

[0021] Further, a wrenching cooperation structure is provided on the conductive column, and the wrenching cooperation structure is a wrenching cooperation hole provided on the top surface of the conductive column.

[0022] The advantage thereof is that it is convenient for processing.

[0023] Further, there are two or more wrenching cooperation holes.

[0024] The advantage thereof is to avoid stress concentration.

[0025] Further, the wrenching cooperation hole is a round hole.

[0026] The advantage thereof is that it is convenient for processing.

[0027] Further, a centering cooperation structure is provided on the top surface of the conductive column, and the centering cooperation structure is used to cooperate with a centering tooling to center the conductive column with the shell of the vacuum circuit breaker as a reference during the installation process of the conductive column.

[0028] The advantage thereof is that in the early stage of the assembly process of the conductive column, it can avoid skew during the connection between the first external thread and the corresponding incoming line connection seat or outgoing line connection seat, and ensure the coaxiality between the conductive column and the corresponding outgoing line sleeve.

[0029] Further, the centering cooperation structure is a centering hole.

[0030] The advantage thereof is that it is convenient for processing.

[0031] The technical solution of the vacuum circuit breaker in the present invention is: a vacuum circuit breaker, comprising a housing, a solid-sealed pole column incoming and outgoing line structure, and an outgoing line bushing, and the solid-sealed pole column incoming and outgoing line structure is electrically connected to the corresponding outgoing line bushing;

[0032] The solid-sealed pole column incoming and outgoing line structure includes

[0033] A solid-sealed pole column, including an incoming line port, an outgoing line port, an incoming line connection seat, and an outgoing line connection seat;

[0034] The incoming line connection seat is arranged corresponding to the incoming line port, and the outgoing line connection seat is arranged corresponding to the outgoing line port;

[0035] Inserts are arranged on the inner walls of the incoming line port and the outgoing line port, and the inserts have internal threads;

[0036] A conductive column, the conductive column includes a first external thread at the bottom, a second external thread in the middle, and a plugging structure at the top;

[0037] The first external thread is used for threaded connection with the corresponding incoming line connection seat or outgoing line connection seat;

[0038] The second external thread is used for connection with the internal thread of the corresponding insert;

[0039] The plugging structure is used for plugging and mating with the corresponding outgoing line bushing in the vacuum circuit breaker.

[0040] The beneficial effect of the vacuum circuit breaker in the present invention is: the first external thread is threadedly connected to the corresponding incoming line connection seat or outgoing line connection seat, and the second external thread is threadedly connected to the internal thread of the insert in the corresponding incoming line port or outgoing line port. The two threaded connections avoid radial movement or deflection of the conductive column during use. The two threaded connections are achieved through one screwing operation, which is convenient for operation and has high assembly efficiency.

[0041] Further, the radial dimension of the conductive column at the second external thread is larger than the radial dimension of the conductive column at the first external thread.

[0042] The beneficial aspect is to avoid interference between the first external thread and the insert during installation.

[0043] Further, the radial dimension of the conductive column at the plugging structure is larger than the radial dimension of the conductive column at the second external thread.

[0044] The beneficial aspect is that the radial dimension at the plugging structure is larger, avoiding interference with the contact between the conductive column and the outgoing line bushing by parts other than the plugging structure.

[0045] Further, a wrenching cooperation structure is provided on the conductive column, and the wrenching cooperation structure is a wrenching cooperation hole provided on the top surface of the conductive column.

[0046] The beneficial aspect is that it is convenient for processing.

[0047] Further, there are more than two wrenching mating holes.

[0048] The advantage is that stress concentration is avoided.

[0049] Further, the wrenching mating holes are round holes.

[0050] The advantage is that they are easy to machine.

[0051] Further, a centering mating structure is provided on the top surface of the conductive column. The centering mating structure is used to cooperate with a centering tooling to center the conductive column with the housing of the vacuum circuit breaker as a reference during the installation process of the conductive column.

[0052] The advantage is that, in the early stage of the assembly process of the conductive column, skewing during the connection of the first external thread and the corresponding incoming line connection seat or outgoing line connection seat is avoided, ensuring the coaxiality between the conductive column and the corresponding outgoing line bushing.

[0053] Further, the centering mating structure is a centering hole.

[0054] The advantage is that they are easy to machine. Description of the Drawings

[0055] Figure 1 is a three-dimensional view of Specific Embodiment 1 of the vacuum circuit breaker of the present invention;

[0056] Figure 2 is Figure 1 a cross-sectional view of;

[0057] Figure 3 is Figure 2 an enlarged view of part A in;

[0058] Figure 4 is Figure 1 a three-dimensional view of the conductive column in;

[0059] In the figure: 1, housing; 2, outgoing line bushing; 3, operating mechanism; 4, outgoing line connection seat; 5, moving end; 6, arc extinguishing chamber; 7, static end; 8, incoming line connection seat; 9, conductive column; 91, centering hole; 92, wrenching mating hole; 93, finger mounting groove; 94, second external thread; 95, first external thread; 10, insert; 11, solid-sealed pole column housing. Detailed Embodiments

[0060] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application, that is, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0061] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings below is not intended to limit the scope of the present application claimed, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0062] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0063] The features and performance of the present application will be further described in detail below in conjunction with the embodiments.

[0064] Specific Embodiment 1 of the vacuum circuit breaker of the present application: As Figure 1 and Figure 2 shown, the vacuum circuit breaker includes a housing 1, three solid-sealed pole column incoming and outgoing line structures, an outgoing line bushing 2 and an operating mechanism 3. Taking one of the solid-sealed pole column incoming and outgoing line structures as an example for illustration: The solid-sealed pole column outgoing line structure is arranged inside the housing 1 and includes a solid-sealed pole column. The solid-sealed pole column encloses a vacuum arc extinguishing chamber 6. The vacuum arc extinguishing chamber 6 includes a moving end 5 and a static end 7. The operating mechanism 3 drives the moving end 5 to act so that the moving end 5 and the static end 7 of the vacuum arc extinguishing chamber 6 are separated and combined to realize the on-off of the circuit.

[0065] As Figure 2 and Figure 3The encapsulated pole column shown includes an encapsulated pole column housing, an incoming line connection base 8, an outgoing line connection base 4, and two inserts 10. The moving end 5 is fixedly connected to the outgoing line connection base 4, and the static end 7 is fixedly connected to the incoming line connection base 8. The encapsulated pole column housing includes an incoming line port and an outgoing line port. The incoming line connection base 8 and one of the inserts 10 are arranged corresponding to the incoming line port, and the outgoing line connection base 4 and the other insert 10 are arranged corresponding to the outgoing line port.

[0066] The incoming line connection base 8, the outgoing line connection base 4, and the insert 10 are embedded on the encapsulated pole column housing 11 during the casting process of the encapsulated pole column housing 1. The specific operation steps are as follows: Coat the outer surface of the first auxiliary bolt with grease and then thread-connect it to the outgoing line connection base 4 and one of the inserts 10. After the thread connection, put them together into the predetermined position in the mold. Coat the outer surface of the second auxiliary bolt with grease and then thread-connect it to the incoming line connection base 8 and the other insert 10. After the thread connection, put them together into the predetermined position in the mold. Inject epoxy resin into the mold until the cavity of the mold is filled. After the epoxy resin cools, remove the mold and unscrew the first auxiliary bolt and the second auxiliary bolt. At this time, the encapsulated pole column housing 11 is manufactured and the incoming line connection base 8, the outgoing line connection base 4, and the two inserts 10 are embedded in the encapsulated pole column housing 11.

[0067] The outgoing line bushing 2 includes an outgoing line bushing arranged corresponding to the incoming line port and a static end outgoing line bushing arranged corresponding to the outgoing line port. The static end outgoing line bushing and the moving end outgoing line bushing are respectively used for connecting corresponding cables. The outgoing line connection base 4 is electrically connected to the moving end outgoing line bushing, and the incoming line connection base 8 is electrically connected to the static end outgoing line bushing.

[0068] As Figure 4 shown, the incoming and outgoing line structure of the encapsulated pole column further includes two conductive columns 9. One of the conductive columns 9 is used to realize the electrical connection between the outgoing line connection base 4 and the moving end outgoing line bushing, and the other conductive column 9 is used to realize the electrical connection between the incoming line connection base 8 and the static end outgoing line bushing. The conductive column 9 includes a first external thread 95 at the bottom, a second external thread 94 in the middle, and a finger mounting groove 93 at the top. The first external thread 95 is used for thread-connecting with the corresponding incoming line connection base 8 or outgoing line connection base 4; the second external thread 94 is used for thread-connecting with the internal thread of the corresponding insert 10; the finger mounting groove 93 is used for mounting a strap-type finger, and the strap-type finger is used for plugging and matching with the corresponding moving end outgoing line bushing or static end outgoing line bushing. The finger mounting groove 93 forms a plugging structure. The connection between the incoming line connection base 8 and the static end outgoing line bushing or the connection between the outgoing line connection base 4 and the moving end outgoing line bushing is realized through the conductive column 9. Moreover, through the two threaded connections, the radial movement or yaw of the conductive column 9 during use is avoided, ensuring the reliable electrical connection between the conductive column 9 and the corresponding outgoing line bushing or moving end outgoing line bushing. The two threaded connections are realized through one screwing operation, which is convenient to operate and has high assembly efficiency.

[0069] The radial dimension of the conductive post 9 at the finger mounting groove 93 is greater than the radial dimension of the conductive post 9 at the second external thread 94, and the radial dimension of the conductive post 9 at the second external thread 94 is greater than the radial dimension of the conductive post 9 at the first external thread 95. A centering hole 91 is coaxially arranged on the top surface of the conductive post 9, and wrenching fit holes 92 are arranged on both sides of the centering hole 91. Both the wrenching fit holes 92 and the centering hole 91 are circular holes and are on the same straight line.

[0070] Specific embodiment 2 of the vacuum circuit breaker of the present application. The difference between this embodiment and specific embodiment 1 is that: the radial dimension of the conductive post at the second external thread is equal to the radial dimension of the conductive post at the first external thread. During the assembly process of the conductive post, the first external thread needs to be threadedly engaged with the insert first before it can pass through the insert.

[0071] Specific embodiment 3 of the vacuum circuit breaker of the present application. The difference between this embodiment and specific embodiment 1 is that: the radial dimension of the conductive post at the plug-in structure is equal to the radial dimension of the conductive post at the second external thread, and the strap-type finger protrudes circumferentially beyond the second external thread to prevent the conductive post at the second external thread from interfering with the fit between the strap-type finger and the corresponding outgoing line bushing.

[0072] Specific embodiment 4 of the vacuum circuit breaker of the present application. The difference between this embodiment and specific embodiment 1 is that: the wrenching fit structure is a wrenching fit protrusion arranged on the top surface of the conductive post.

[0073] Specific embodiment 5 of the vacuum circuit breaker of the present application. The difference between this embodiment and specific embodiment 1 is that: only one wrenching fit hole is provided, and at this time, the wrenching fit hole needs to be in a form other than a circular hole, for example, a triangular hole, a regular hexagonal hole, etc.

[0074] Specific embodiment 6 of the vacuum circuit breaker of the present application. The difference between this embodiment and specific embodiment 1 is that: the wrenching fit holes are regular hexagonal holes and there are three of them.

[0075] Specific embodiment 7 of the vacuum circuit breaker of the present application. The difference between this embodiment and specific embodiment 1 is that: the centering fit structure is not provided. This form is applicable to the situation where the coaxiality requirement for the conductive post and the corresponding outgoing line bushing is not high.

[0076] Specific embodiment 8 of the vacuum circuit breaker of the present application. The difference between this embodiment and specific embodiment 1 is that: the positioning fit structure is a cylindrical positioning fit protrusion.

[0077] The specific embodiment of the incoming and outgoing line structure of the solid-sealed pole column of the present application has the same structure as the incoming and outgoing line structure of the solid-sealed pole column in the above specific embodiments of the vacuum circuit breaker, and will not be elaborated here.

[0078] The above are only the preferred embodiments of the present application and are not intended to limit the present application. The scope of patent protection of the present application shall be subject to the claims. Any equivalent structural changes made by using the content of the specification and drawings of the present application shall similarly be included in the protection scope of the present application.

Claims

1. The incoming and outgoing line structure of the solid-sealed pole column is characterized in that: It includes a solid-sealed pole column, which includes an inlet, an outlet, an inlet connection seat, an outlet connection seat, a solid-sealed pole column housing and a conductive column; the inlet connection seat is arranged corresponding to the inlet, and the outlet connection seat is arranged corresponding to the outlet; inserts are provided on the inner walls of the solid-sealed pole column housing at the positions of the inlet and the outlet, and the inserts have internal threads; the conductive column is an integrally structured conductive column, which includes a first external thread provided at the bottom of the conductive column, a second external thread in the middle and a plug-in structure at the top; the first external thread is threadedly connected to the corresponding inlet connection seat or outlet connection seat; the second external thread is threadedly connected to the internal thread of the corresponding insert; the plug-in structure is used for plugging and mating with the corresponding outlet bushing in the vacuum circuit breaker; the inlet connection seat, the outlet connection seat and the two inserts are jointly embedded on the solid-sealed pole column housing, and the following method is used for embedding: coat the outer surface of the first auxiliary bolt with grease and then threadedly connect it to the outlet connection seat and one of the inserts, coat the outer surface of the second auxiliary bolt with grease and then threadedly connect it to the inlet connection seat and the other insert; after the threaded connection, jointly place them in the predetermined position in the mold, inject epoxy resin into the mold until the cavity of the mold is filled, remove the mold after the epoxy resin cools, and screw out the first auxiliary bolt and the second auxiliary bolt.

2. The lead-in and lead-out structure of the encapsulated pole column according to claim 1, wherein: The radial dimension of the conductive column at the second external thread is larger than the radial dimension of the conductive column at the first external thread.

3. The incoming and outgoing line structure of the encapsulated pole column according to claim 1 or 2, characterized in that: The radial dimension of the conductive column at the plug-in structure is larger than the radial dimension of the conductive column at the second external thread.

4. The incoming and outgoing line structure of the encapsulated pole column according to claim 1 or 2, characterized in that: A wrenching cooperation structure is provided on the conductive column, and the wrenching cooperation structure is a wrenching cooperation hole provided on the top surface of the conductive column.

5. The lead-in and lead-out structure of the encapsulated pole column according to claim 4, wherein: There are more than two of the wrenching cooperation holes.

6. The lead-in and lead-out structure of the encapsulated pole column according to claim 5, characterized in that: The wrenching cooperation hole is a round hole.

7. The incoming and outgoing line structure of the encapsulated pole column according to claim 1 or 2, characterized in that: A centering cooperation structure is provided on the top surface of the conductive column, and the centering cooperation structure is used for cooperating with a centering tooling to center the conductive column with the housing of the vacuum circuit breaker as a reference during the installation process of the conductive column.

8. The incoming and outgoing line structure of the encapsulated pole column according to claim 7, characterized in that: The centering cooperation structure is a centering hole.

9. A vacuum circuit breaker, which includes a housing, a solid-sealed pole column inlet and outlet structure and an outlet bushing, and the solid-sealed pole column inlet and outlet structure is electrically connected to the corresponding outlet bushing; It is characterized in that The solid-sealed pole column inlet and outlet structure is the solid-sealed pole column inlet and outlet structure according to any one of claims 1-8.

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