Insulating cylinder

Abstract

The utility model discloses an insulating cylinder, which relates to the technical field of circuit breakers, and comprises an insulating cylinder body, a base, a vacuum tube, a reinforcing rib, a first buffer gasket, a second buffer gasket and a connecting mechanism, the connecting mechanism comprises a connecting plate, the insulating cylinder body is arranged on the base, the connecting plate is arranged inside the insulating cylinder body, and the vacuum tube is arranged on the base. The second buffer gasket is arranged on the connecting plate, the vacuum tube is arranged on the second buffer gasket, the first buffer gasket is arranged on one surface, far away from the base, of the vacuum tube, one end of the reinforcing rib is arranged at one end, far away from the base, of the insulating cylinder body, and the other end of the reinforcing rib is arranged at the other end of the insulating cylinder body. And the other end of the reinforcing rib is propped against the buffer gasket. The first buffer gasket and the second buffer gasket play a role in buffering impact force, and the reinforcing ribs enhance the overall strength of the insulating cylinder body, so that the insulating cylinder has a longer service life, and the firmness of connection between the insulating cylinder and internal components thereof is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an insulating cylinder. Background Art

[0002] Insulation cylinders are commonly used components in circuit breakers. Their main functions include assisting and guiding wiring to complete electrical connections, protecting internal components of the equipment from the influence of the external environment, preventing faults such as short circuits between internal components and the outside, and improving the reliability and safety of the equipment. Among them, the VS1 insulation cylinder is a key accessory in the VS1 series vacuum circuit breakers. It is widely used in power systems and has excellent insulation, mechanical and heat resistance properties. It can withstand various mechanical stresses during the operation of the circuit breaker, effectively preventing current leakage and short circuits. It can ensure the stable operation of the vacuum circuit breaker in different environments and protect users' electricity safety.

[0003] The patent with publication date of April 12, 2022 and announcement number CN216288159U discloses an insulating cylinder, including a cylinder shell, a mounting platform at the lower end of the cylinder shell, an insulating layer inside the cylinder shell, and an air convection layer formed between the cylinder shell and the insulating layer. An exhaust end face is opened on the side of the bottom of the mounting platform to realize the exhaust function. The inside of the cylinder shell is connected with an insulating layer through reinforcing ribs, and the vacuum tube is encapsulated in the insulating layer. A hollow structure is formed between the insulating layer and the cylinder shell to form an air convection bonding layer, which effectively improves the insulation effect between the insulating cylinder and the vacuum tube. Exhaust end faces are opened on both sides of the bottom of the mounting platform, and a height difference is formed between the exhaust end face and the mounting platform, which improves the exhaust performance of the insulating cylinder. The first conductive part is designed as a Z-shaped structure as a whole, which is more compatible with the first wire outlet seat and is faster and more convenient to install.

[0004] In actual applications, the insulating cylinder is an important component of the vacuum circuit breaker. It is mainly used to fix the vacuum interrupter, withstand short-circuit electromotive force, and enhance the phase-to-phase insulation level. Its internal space contains bellows, shielding cover, contacts and other parts. These parts constitute the vacuum tube, which needs to be fixed inside the insulating cylinder. During the circuit breaking and reconnection process, the moving end contact needs to contact the static end contact to connect the current. Therefore, the vacuum tube is impacted, which may cause the connection between the vacuum tube and the insulating cylinder to loosen, or cause cracks to appear at the connection, affecting the normal use of the vacuum circuit breaker. The above solution takes into account improving the exhaust performance of the insulating cylinder and making installation faster and more convenient, but ignores the need to strengthen the firmness of the connection between the insulating cylinder and its internal components.

[0005] Therefore, it is necessary to provide an insulating cylinder. Utility Model Content

[0006] The embodiment of the present application provides an insulating cylinder, which can improve the problem in the related art that the vacuum tube inside the insulating cylinder is frequently impacted, resulting in a reduction in the life of the connection between the vacuum tube and the insulating cylinder and the vacuum tube itself, affecting normal use.

[0007] An embodiment of the present application provides an insulating tube, comprising an insulating tube body, a base, a vacuum tube, a reinforcing rib, a first buffer washer, a second buffer washer and a connecting mechanism, wherein the connecting mechanism comprises a connecting plate, the insulating tube body is arranged on the base, the connecting plate is arranged inside the insulating tube body, the second buffer washer is arranged on the connecting plate, the vacuum tube is arranged on the second buffer washer, the first buffer washer is arranged on a side of the vacuum tube away from the base, one end of the reinforcing rib is arranged on an end of the insulating tube body away from the base, and the other end of the reinforcing rib abuts against the buffer washer.

[0008] An embodiment of the present application provides an insulating tube, in which a vacuum tube placed inside the insulating tube body maintains a high vacuum state and is used to vacuum extinguish the arc generated when the contacts are separated during a circuit break. The vacuum tube is an indispensable component. A first buffer gasket is added above the vacuum tube, which helps to buffer the impact force on the side of the vacuum tube connected to the static contact when the circuit is connected. A second buffer gasket is provided between the vacuum tube and the connecting plate, which helps to buffer the force at the connection point. The reinforcing ribs play the role of force distribution and limitation.

[0009] The above-mentioned technical solution in the embodiment of the present application has at least the following technical effects: the base is used to fix the insulating tube body in a certain position, and a first buffer washer is added above the vacuum tube, which is beneficial for buffering the impact force on the side of the vacuum tube connected to the static end contact when the circuit is connected. The second buffer washer is arranged between the vacuum tube and the connecting plate, which is beneficial for buffering the force at the connection point. The reinforcing ribs can enhance the overall strength of the insulating tube body, so that the insulating tube has a longer service life.

[0010] In some embodiments, the insulating tube body includes a tube body, an upper outlet tube, a lower outlet tube, an electrical connection block and a corrugated umbrella skirt. The tube body is arranged on the base, the lower outlet tube is arranged on the end of the tube body close to the base, the upper outlet tube is arranged on the end of the tube body away from the base, and the centers of the upper outlet tube and the lower outlet tube are on the same vertical line. The corrugated umbrella skirt is arranged on the tube body and is located between the lower outlet tube and the base.

[0011] In some embodiments, a baffle is provided at one end of the cylinder away from the base, and the baffle is movably connected to the cylinder.

[0012] In some embodiments, the base, the baffle and the insulating tube body are all made of epoxy resin flame retardant material.

[0013] In some embodiments, a raised platform is provided on the outer wall of the vacuum tube, and a threaded hole is provided on the raised platform.

[0014] In some embodiments, the connecting mechanism also includes a bolt, the connecting plate is provided with a through hole, the bolt passes through the through hole and the threaded hole on the raised platform, and is threadedly connected to the raised platform, the second buffer washer is sleeved on the bolt, and one side of the second buffer washer abuts against the connecting plate, and the other side abuts against the raised platform.

[0015] In some embodiments, a through hole is provided on the base for cooperating with a locking part to fix the insulating cylinder on the bottom plate of the vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 A schematic diagram of the overall structure of an insulating cylinder provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the overall structure of an insulating cylinder baffle provided in an embodiment of the application;

[0019] Figure 3 for Figure 2 Schematic diagram of the anatomical structure along direction A;

[0020] Figure 4 for Figure 3 Enlarged view of part B.

[0021] Among them, the reference numerals in the figures are:

[0022] 1. Base; 2. Insulating tube body; 21. Cylinder body; 22. Upper outlet pipe; 23. Lower outlet pipe; 24. Corrugated umbrella skirt; 3. Connecting mechanism; 31. Connecting plate; 32. Bolt; 4. Vacuum tube; 5. Raised platform; 6. First buffer washer; 7. Second buffer washer; 8. Reinforcement rib; 9. Baffle. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the accompanying drawings are intended to cover non-exclusive inclusions.

[0025] In order to improve the problem in the related art that the vacuum tube inside the insulating cylinder is frequently impacted, resulting in a reduction in the life of the connection between the vacuum tube and the insulating cylinder and the vacuum tube itself, affecting normal use, the embodiments of the present application provide the following solution.

[0026] Please also refer to Figure 1-Figure 4 , including an insulating tube body 2, a base 1, a vacuum tube 4, a reinforcing rib 8, a first buffer washer 6, a second buffer washer 7 and a connecting mechanism 3, the connecting mechanism 3 including a connecting plate 31, the insulating tube body 2 is arranged on the base 1, the connecting plate 31 is arranged inside the insulating tube body 2, there are 3 insulating plates inside the insulating tube body 2, which are arranged in a triangular position on the inner wall of the circle, the insulating tube body 2, the base 1 and the connecting plate 31 are integrally formed, the second buffer washer 7 abuts on the connecting plate 31, the vacuum tube 4 abuts on the second buffer washer 7, the first buffer washer 6 abuts on the side of the vacuum tube 4 away from the base 1, the reinforcing rib 8 also has three, which are arranged in a triangular position on the inner wall of the circle and are staggered with the connecting plate 31, and the two are not on a straight line, one end of the reinforcing rib 8 is bonded to the end of the insulating tube body 2 away from the base 1, and the other end of the reinforcing rib 8 abuts against the buffer washer.

[0027] With such arrangement, the static end contact is connected to the side of the inside of the vacuum tube 4 away from the base 1. When power is needed, the dynamic end contact will collide with the static end, generating force during the collision, which will have an impact on the vacuum tube 4, especially the connection between the vacuum tube 4 and the static end contact and the connection between the vacuum tube 4 and the inside of the insulating tube body 2. Long-term collision may cause wear of the wires at the above two locations, affecting the normal use of the instrument. After using the first buffer washer 6 and the second buffer washer 7, when the vacuum tube 4 is impacted during the power supply process, on the one hand, the force on the side of the vacuum tube 4 connected to the static end contact is buffered, and on the other hand, the force between the vacuum tube 4 and the connecting plate 31 is relieved, and the presence of multiple reinforcing ribs 8 can equally distribute the force on the first buffer washer 6 to each reinforcing rib 8, while playing a limiting support role for the vacuum tube 4, thereby strengthening the overall strength of the insulating tube body 2 and allowing the insulating tube to have a longer service life.

[0028] Optionally, in some embodiments, please refer to Figure 1-Figure 3 The insulating cylinder body 2 includes a cylinder body 21, an upper outlet pipe 22, a lower outlet pipe 23 and a corrugated shed 24. The cylinder body 21 is arranged on the base 1, and the lower outlet pipe 23 is arranged on the end of the cylinder body 21 close to the base 1. The upper outlet pipe 22 is arranged on the end of the cylinder body 21 away from the base 1, and the centers of the upper outlet pipe 22 and the lower outlet pipe 23 are on the same vertical line. The corrugated shed 24 is arranged on the cylinder body 21 and is located between the lower outlet pipe 23 and the base 1. The cylinder body 21, the upper outlet pipe 22, the lower outlet pipe 23 and the corrugated shed 24 are all integrally formed.

[0029] In this arrangement, the upper outlet tube 22, the lower outlet tube 23, the electrical connection block and the corrugated shed 24 are all important functional parts of the insulating tube body 2. The upper outlet tube 22 is located at the upper part of the tube 21 and is used to connect the power supply or load on the high-voltage side. The lower outlet tube 23 is located at the lower part of the tube 21 and is also used to connect the circuit, but is connected to the low-voltage side or the grounding system. The upper outlet tube 22 and the lower outlet tube 23 are connected to the tube 21. The corrugated shed 24 refers to the corrugated raised part of the surface of the tube 21, which is equivalent to the extension of the surface of the tube 21. When the insulating tube is used for a long time, the surface of its gray insulating material is contaminated, damp or there are other conductive substances, creepage is likely to occur. The corrugated shed 24 increases the unevenness or tortuosity of the surface of the tube 21, making the potential creepage path more complex and tortuous. This tortuous path increases the difficulty of current flowing on the surface of the insulating material, thereby improving the insulation performance. The one-piece molding is to reduce the gaps generated during the assembly process to improve the overall strength and insulation of the insulating tube.

[0030] Optionally, in some embodiments, please refer to Figure 1 A baffle 9 is provided at one end of the cylinder 21 away from the base 1, and the baffle 9 is movably connected to the cylinder 21. The baffle 9 includes but is not limited to being flat and having the same area as the beginning of the cylinder 21; it is umbrella-shaped. When the insulating cylinder is used in the wild, it can be ensured as much as possible that the cylinder 21 is not wetted by rain.

[0031] In this arrangement, the baffle 9 is a removable baffle 9, and the shape of the baffle 9 can be replaced according to actual conditions. The internal parts of the insulating tube are easily affected by dust, rain, etc., and may even be damaged, increasing maintenance costs and causing potential crises. The insulating baffle 9 can provide reliable safety protection and extend the service life of the internal parts of the insulating tube.

[0032] Optionally, in some embodiments, please refer to Figure 1 The base 1, baffle 9 and the insulating tube body 2 are all made of epoxy resin flame retardant material.

[0033] With this setting, conventional epoxy resin materials do not have flame retardant properties. When using epoxy resin to make a model, adding flame retardant to the epoxy resin can significantly improve the flame retardant effect of the epoxy resin model, making it fire-proof and high-temperature resistant. During the use of the insulating tube, the arc extinguishing process when the power is off will generate a lot of heat. The use of epoxy resin flame retardant material can ensure insulation and heat resistance to increase the service life of the insulating tube.

[0034] Optionally, in some embodiments, please refer to Figure 2 as well as Figure 4 The connecting mechanism 3 also includes a bolt 32, a raised platform 5 is bonded to the outer wall of the vacuum tube 4, the connecting plate 31 is provided with a through hole, and the raised platform 5 is provided with a threaded hole. The bolt 32 passes through the through hole and the threaded hole on the raised platform 5 and is threadedly connected to the raised platform 5. The second buffer washer 7 is sleeved on the bolt 32, and one side of the second buffer washer 7 abuts against the connecting plate 31, and the other side abuts against the raised platform 5. The bolt 32 is made of insulating epoxy resin flame retardant material.

[0035] With such an arrangement, during the installation process, the bolt 32 is first passed through the through hole of the connecting plate 31, and then the second buffer washer 7 is sleeved on the part where the bolt 32 passes through the through hole of the connecting plate 31. The vacuum tube 4 moves along the inner wall direction of the cylinder 21 and adjusts its position until the bolt 32 is connected to the threaded hole of the raised platform 5 on the outer wall of the vacuum tube 4. Then, the relative position of the vacuum tube 4 and the connecting plate 31 is fixed, and the bolt 32 is rotated, and finally one side of the second buffer washer 7 is abutted against the connecting plate 31, and the other side is abutted against the raised platform 5. At this time, the second buffer washer 7 plays the role of buffering the impact force of the connection part between the connecting plate 31 and the raised platform 5, thereby ensuring a firm connection between the vacuum tube 4 and the cylinder 21.

[0036] Optionally, in some embodiments, please refer to Figure 1 as well as Figure 2 The base 1 is provided with through holes, which are located at the four corners of the base 1 and are used to fix the insulating cylinder on the bottom plate of the vacuum circuit breaker. The base 1 is also provided with protrusions that play the same role as the corrugated umbrella skirt 24.

[0037] In this arrangement, the insulating cylinder, as an important component of the vacuum circuit breaker, needs to be fixed on a certain base plate to protect parts such as the vacuum tube 4. When fixed, the base 1 is placed on a certain base plate. According to the size and position of the through hole, a combination of bolts 32 and nuts is selected, or a locker is used to fix the base 1. The raised part on the base 1 also serves to increase the creepage distance.

[0038] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An insulating cylinder, characterized in that: include: An insulating tube body (2), a base (1), a vacuum tube (4), a reinforcing rib (8), a first buffer washer (6), a second buffer washer (7) and a connecting mechanism (3), wherein the connecting mechanism (3) includes a connecting plate (31), the insulating tube body (2) is arranged on the base (1), the connecting plate (31) is arranged inside the insulating tube body (2), the second buffer washer (7) is arranged on the connecting plate (31), the vacuum tube (4) is arranged on the second buffer washer (7), the first buffer washer (6) is arranged on a side of the vacuum tube (4) away from the base (1), one end of the reinforcing rib (8) is arranged on an end of the insulating tube body (2) away from the base (1), and the other end of the reinforcing rib (8) abuts against the first buffer washer (6).

2. The insulating cylinder according to claim 1, characterized in that: The insulating cylinder body (2) comprises a cylinder (21), an upper outlet pipe (22), a lower outlet pipe (23), an electrical connection block and a corrugated shed (24); the cylinder (21) is arranged on the base (1); the lower outlet pipe (23) is arranged on an end of the cylinder (21) close to the base (1); the upper outlet pipe (22) is arranged on an end of the cylinder (21) away from the base (1); the centers of the upper outlet pipe (22) and the lower outlet pipe (23) are on the same vertical line; the corrugated shed (24) is arranged on the cylinder (21) and located between the lower outlet pipe (23) and the base (1).

3. The insulating cylinder according to claim 2, characterized in that: A baffle (9) is provided at one end of the cylinder (21) away from the base (1), and the baffle (9) is movably connected to the cylinder (21).

4. The insulating cylinder according to claim 3, characterized in that: The base (1), the baffle (9) and the insulating tube body (2) are all made of epoxy resin flame retardant material.

5. The insulating cylinder according to claim 4, characterized in that: A raised platform (5) is provided on the outer wall of the vacuum tube (4), and a threaded hole is provided on the raised platform (5).

6. The insulating cylinder according to claim 5, characterized in that: The connecting mechanism (3) further includes a bolt (32), the connecting plate (31) is provided with a through hole, the bolt (32) passes through the through hole and the threaded hole on the raised platform (5), and is threadedly connected to the raised platform (5), the second buffer washer (7) is sleeved on the bolt (32), and one side of the second buffer washer (7) abuts against the connecting plate (31) and the other side abuts against the raised platform (5).

7. The insulating cylinder according to claim 6, characterized in that: The base (1) is provided with a plurality of through holes.

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