High-voltage isolating switch with good sealing and insulating properties

Abstract

The utility model relates to the technical field of isolating switches, and discloses a high-voltage isolating switch with good sealing and insulating properties, which comprises a base, a static contact, a moving contact, a disconnecting link assembly, an insulating frame body, an insulating mounting shell and an insulating sealing cover. The insulating frame body is provided with a first connecting end, a second connecting end and a third connecting end; the insulating mounting shell, the second connecting end and the third connecting end are integrally formed; a placement groove is formed in the insulating mounting shell; one end of the disconnecting link assembly is hinged with the static contact, and the other end can swing in and out of the placement groove relative to the insulating frame body; and the insulating sealing cover is connected to the disconnecting link assembly, can be matched with the notch of the placement groove for sealing and covering, and can synchronously swing along with the disconnecting link assembly. According to the high-voltage isolating switch with good sealing and insulating properties, the sealing and insulating path of the structure is optimized, an electric conductor formed by the static contact, the moving contact and the disconnecting link assembly can be prevented from being polluted by the external environment, such as the pollution of external moisture or dust, and the service life of the structure can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a high-voltage disconnecting switch with good sealing and insulation properties. Background Technology

[0002] Currently, high-voltage disconnect switches are crucial control and protection devices in power systems, and their sealing and insulation performance directly affects the system's safety and reliability. Traditional high-voltage disconnect switches often suffer from problems such as inadequate sealing and insufficient insulation performance, especially under harsh environmental conditions.

[0003] For example, Chinese patent application CN201320246529.2 discloses an insulating support body and a high-voltage disconnecting switch for AC high-voltage lines. It comprises an insulating support body formed by an insulating main trunk and insulating branches branching off from it on both sides. The top ends of the two insulating branches are the mounting ends of the switch assembly, and the bottom surface of the insulating main trunk is the base fixing end. The insulating support body is a V-shaped, Y-shaped, U-shaped, or T-shaped insulating support body formed by the insulating main trunk and insulating branches. The bottom surface of the insulating main trunk is fixed to the base, and the top ends of the two insulating branches are equipped with switch assembly components consisting of a stationary contact fixing plate and a knife switch. However, the insulating support body and the switch assembly components of the high-voltage disconnecting switch for AC high-voltage lines lack a sealed and insulated structural protection, leaving them exposed to the environment. External moisture, dust, and other contaminants can easily enter their interiors, affecting the normal operation of the system circuit and hindering the extension of the structure's service life. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of the prior art and provide a high-voltage disconnecting switch with good sealing and insulation properties.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A high-voltage disconnector with good sealing and insulation includes a base, a stationary contact, a moving contact, and a knife switch assembly; it also includes:

[0007] An insulating frame having a first connecting end, a second connecting end, and a third connecting end; the insulating frame is connected to the first connecting end.

[0008] An insulating mounting housing is integrally formed with a second connecting end and a third connecting end; the insulating mounting housing has a mounting groove; the stationary contact and the moving contact are respectively connected to the two ends of the insulating mounting housing; the knife switch assembly is placed in the mounting groove;

[0009] One end of the knife switch assembly is hinged to the stationary contact, and the other end can swing in and out of the mounting slot relative to the insulating frame and can be locked with the moving contact;

[0010] An insulating sealing cover is attached to the knife switch assembly and can be fitted and sealed to the opening of the mounting groove, and can swing synchronously with the knife switch assembly.

[0011] Furthermore, the insulating frame is a Y-shaped insulating frame, a U-shaped insulating frame, or a V-shaped insulating frame.

[0012] Furthermore, the insulating mounting shell has a first bayonet and a second bayonet at both ends, both of which are connected to the mounting groove; the insulating mounting shell has a first sealing cover and a second sealing cover at the positions corresponding to the first bayonet and the second bayonet at both ends.

[0013] The stationary contact includes a first terminal and a stationary contact head; the stationary contact head is connected in the mounting groove and hinged to one end of the knife switch assembly; one end of the first terminal is fitted into the first bayonet and integrally formed with the first terminal, and the other end extends out of the insulating mounting shell; the first sealing sleeve is fitted onto one end of the first terminal and fitted onto the first bayonet.

[0014] The moving contact includes a second terminal and a moving contact head; the moving contact head is connected in the mounting groove and locked to the other end of the knife switch assembly; one end of the second terminal is fitted into the second bayonet and integrally formed with the second terminal, and the other end extends out of the insulating mounting shell; the second sealing sleeve is fitted onto one end of the second terminal and fitted onto the second bayonet.

[0015] Furthermore, the first sealing sleeve cover includes a first collar adapted to fit one end of the first terminal block, a first sealing cover connected to the first collar and adapted to be snapped onto the first bayonet, and a shielding portion connected to the first sealing cover and used to shield the hinge joint between one end of the knife switch assembly and the stationary contact.

[0016] The second sealing sleeve cover includes a second collar adapted to be fitted on one end of the second terminal and a first sealing cover connected to the second collar and adapted to be snapped onto the second bayonet.

[0017] Furthermore, both the stationary contact head and the moving contact head are installed in the mounting groove using positioning screws.

[0018] Furthermore, the insulating sealing cover includes a sealing cover plate body and a cover clamp plate; the two cover clamp plates are located on both sides of the knife switch assembly and are both connected to the knife switch assembly and to the sealing cover plate body.

[0019] The sealing cover is adapted to the groove of the mounting slot and seals it, and can swing synchronously inside and outside the mounting slot with the knife switch assembly.

[0020] Furthermore, the sealing cover plate has an arc-shaped plate portion at one end near the stationary contact that can swing synchronously with the knife switch assembly inside and outside the mounting groove.

[0021] Furthermore, the cover plate is connected to the knife switch assembly by mounting screws.

[0022] Furthermore, the outer wall of the insulating mounting shell is provided with a plurality of insulating awnings that are evenly distributed along its length and extend outward.

[0023] Furthermore, the insulating frame is connected to the first connecting end by at least three positioning bolts.

[0024] Compared with existing technologies, this utility model has the following advantages:

[0025] 1. This utility model combines a base, stationary contact, moving contact, disconnector assembly, insulating mounting shell, and insulating sealing cover. One end of the disconnector assembly is hinged to the stationary contact, while the other end can swing in and out of the mounting slot relative to the insulating frame and can be locked with the moving contact to achieve electrical conduction. An insulating sealing cover is provided on the disconnector assembly to fit and seal with the slot opening, and the insulating sealing cover swings synchronously with the disconnector assembly. This combined design of the insulating mounting shell and insulating sealing cover effectively protects and positions the disconnector assembly, ensuring its sealing and insulation performance in the closed state. It prevents environmental contamination of the conductor formed by the stationary contact, moving contact, and disconnector assembly, such as external moisture or dust entering the switch and disrupting the normal operation of the system circuit. This optimizes the insulation path of the structure, significantly improves the sealing and insulation performance of the high-voltage disconnector, extends the service life of the structure, enhances its stability and reliability, and provides strong protection for the safe and stable operation of the power system.

[0026] 2. This utility model has a first connecting end, a second connecting end, and a third connecting end on the insulating frame. The second connecting end and the third connecting end are integrally formed with the insulating mounting shell, such as by injection molding. The structure is reasonably designed, enhances the connection stability of the structure, optimizes the installation of the structure, makes the installation simpler, and is easy to maintain. It has high practical value and promotion prospects.

[0027] 3. This utility model effectively improves the insulation performance of the high-voltage disconnect switch through multiple insulation designs including an insulating frame, an insulating mounting shell, and an insulating sealing cover, ensuring safe operation under high-voltage conditions. Attached Figure Description

[0028] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a three-dimensional structural diagram of the high-voltage disconnect switch with good sealing and insulation properties according to this utility model.

[0030] Figure 2 This is a three-dimensional structural diagram of the high-voltage disconnecting switch with good sealing and insulation properties according to this utility model.

[0031] Figure 3 This is a three-dimensional structural diagram of the insulating sealing cover of this utility model.

[0032] Figure 4 This is a three-dimensional structural diagram of the first sealing sleeve cover of this utility model.

[0033] Figure 5 This is a three-dimensional structural diagram of the second sealing sleeve cover of this utility model.

[0034] The image includes:

[0035] 1. Base; 2. Stationary contact; 21. First terminal block; 22. Stationary contact head; 3. Moving contact; 31. Second terminal block; 32. Moving contact head; 4. Knife switch assembly; 5. Insulating frame; 51. First connecting end; 52. Second connecting end; 53. Third connecting end; 6. Insulating mounting shell; 6. Installation groove; 61. First bayonet; 62. Second bayonet; 63. Insulating umbrella sheet; 64. Insulating sealing cover; 7. Sealing cover plate body; 71. Arc-shaped plate body part; 711. Cover clamp plate; 72. First sealing sleeve cover; 8. First collar; 81. First sealing cover piece; 82. Shielding part; 83. Second sealing sleeve cover; 9. Second collar; 91. Second sealing cover piece; 92. Positioning screw; 10. Mounting screw; 11. Positioning bolt; 12. Detailed Implementation

[0036] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0037] like Figures 1 to 5As shown, a high-voltage disconnector with good sealing and insulation includes a base, a stationary contact, a moving contact, a disconnector assembly, an insulating frame, an insulating mounting shell, and an insulating sealing cover. The insulating frame provides a stable support structure for the entire switch. The insulating frame has a first connecting end, a second connecting end, and a third connecting end; the insulating frame is connected to the first connecting end; specifically, the insulating frame is connected to the first connecting end by at least three positioning bolts, ensuring a stable and reliable structural connection and convenient assembly and disassembly. The insulating mounting shell is integrally formed with the second and third connecting ends, thus enhancing the overall stability and strength of the structure. The insulating mounting shell has a mounting groove for accommodating the disconnector assembly, achieving effective protection and positioning of the disconnector assembly, and ensuring the stability and accuracy of the disconnector assembly during operation. The stationary and moving contacts are respectively connected to both ends of the insulating mounting housing; the disconnector assembly is placed in the mounting slot; one end of the disconnector assembly is hinged to the stationary contact, and the other end can swing in and out of the mounting slot relative to the insulating frame and can be locked with the moving contact; this design allows the disconnector assembly to be flexibly opened and closed, while ensuring operational stability and reliability. An insulating sealing cover is connected to the disconnector assembly and can be fitted and sealed to the opening of the mounting slot, and can swing synchronously with the disconnector assembly. The design of the insulating sealing cover effectively prevents external moisture, dust, and other contaminants from entering the interior of the insulating mounting housing, giving the high-voltage disconnector excellent insulation performance and sealing, ensuring its internal cleanliness and dryness.

[0038] This high-voltage disconnect switch with excellent sealing and insulation combines a base, stationary contact, moving contact, disconnector assembly, insulating mounting shell, and insulating sealing cover. One end of the disconnector assembly is hinged to the stationary contact, while the other end can swing in and out of the mounting slot relative to the insulating frame and can be locked with the moving contact to achieve electrical conduction. An insulating sealing cover is provided on the disconnector assembly, which fits and seals with the slot opening. This insulating sealing cover swings synchronously with the disconnector assembly. This combined design of the insulating mounting shell and insulating sealing cover effectively protects and positions the disconnector assembly, ensuring its sealing and insulation performance in the closed state. It prevents environmental contamination of the conductor formed by the stationary contact, moving contact, and disconnector assembly, such as external moisture or dust, from entering the switch and disrupting the normal operation of the system circuit. This optimizes the insulation path of the structure, significantly improves the sealing and insulation performance of the high-voltage disconnect switch, extends the service life of the structure, enhances its stability and reliability, and provides strong protection for the safe and stable operation of the power system.

[0039] Preferably, the insulating frame is a Y-shaped, U-shaped, or V-shaped insulating frame. Each Y-shaped, U-shaped, or V-shaped insulating frame includes a first connecting end, a second connecting end, and a third connecting end, forming a three-point support structure between the base and the insulating mounting shell. These shapes not only enhance structural stability but also optimize the insulation path and improve insulation performance.

[0040] In this embodiment, a convenient channel is provided for the installation of the first and second terminals. The insulating mounting housing has a first bayonet and a second bayonet at both ends, both communicating with the mounting groove. A first sealing sleeve and a second sealing sleeve are provided at the corresponding positions of the first and second bayonet at both ends of the insulating mounting housing, which enhances the sealing performance of the structure. The design of the first and second bayonet, and the corresponding first and second sealing sleeves, greatly simplifies the installation process, allowing the terminals to be installed and sealed without complex tools or steps. This design not only improves installation efficiency but also reduces operational difficulty. Furthermore, the first and second sealing sleeves, as compatible locking structures for the first and second bayonet, ensure effective isolation between the interior of the insulating mounting housing and the external environment, preventing the intrusion of moisture, dust, and other harmful substances, thereby improving the reliability and service life of the conductor formed by the stationary contact, moving contact, and knife switch assembly. The stationary contact includes a first terminal and a stationary contact head; the stationary contact head is connected to the mounting groove and hinged to one end of the knife switch assembly; one end of the first terminal is fitted into the first bayonet and integrally formed with the first terminal, while the other end extends out of the insulating mounting shell for easy connection to an external circuit. A first sealing sleeve covers one end of the first terminal and is fitted into the first bayonet, forming an effective sealing structure. The moving contact includes a second terminal and a moving contact head; the moving contact head is connected to the mounting groove and locked to the other end of the knife switch assembly; one end of the second terminal is fitted into the second bayonet and integrally formed with the second terminal, while the other end extends out of the insulating mounting shell for easy connection to an external circuit. A second sealing sleeve covers one end of the second terminal and is fitted into the second bayonet, forming an effective sealing structure. When it is necessary to replace or repair the terminals, the first and second terminals inside the first and second bayonets can be easily viewed simply by removing the first and second sealing covers. There is no need to disassemble the entire structure, which greatly reduces maintenance costs and time.

[0041] To enhance the stability of the first and second sealing sleeve covers respectively mounted on the first and second bayonet openings, and to form a good sealing structure, the first sealing sleeve cover includes a first collar fitted onto one end of the first terminal block, a first sealing cover connected to the first collar and fitted onto the first bayonet opening, and a shielding portion connected to the first sealing cover and used to shield the hinge joint between one end of the switch assembly and the stationary contact. The first sealing sleeve cover is formed by combining the first collar, the first sealing cover, and the shielding portion. The first collar is fitted onto the first terminal block, the first sealing cover matches the first bayonet opening, and the shielding portion also shields the hinge joint between one end of the switch assembly and the stationary contact, ensuring effective isolation between the interior of the insulating mounting housing and the outside environment, preventing the intrusion of moisture, dust, and other harmful substances, thereby improving the reliability and service life of the structure. The second sealing sleeve cover includes a second collar fitted onto one end of the second terminal block and a first sealing cover connected to the second collar and fitted onto the second bayonet opening. Similarly, this also ensures effective isolation between the interior of the insulating mounting shell and the outside world, preventing the intrusion of harmful substances such as moisture and dust, thereby improving the reliability and service life of the structure.

[0042] To enhance structural connection stability and facilitate assembly and disassembly between structures, both the stationary and moving contact heads are installed in the mounting slot using positioning screws.

[0043] In this embodiment, the insulating sealing cover includes a sealing cover plate body and a cover clamp plate. Two cover clamp plates are located on both sides of the disconnector assembly and are connected to both the disconnector assembly and the sealing cover plate body. Specifically, the cover clamp plates are connected to the disconnector assembly via mounting screws, ensuring a stable and reliable structural connection and convenient assembly and disassembly. The sealing cover plate body is fitted to the opening of the mounting groove and can swing synchronously with the disconnector assembly inside and outside the mounting groove. By combining the sealing cover plate body and the cover clamp plate to form an insulating sealing cover, effective protection and positioning of the disconnector assembly are achieved, ensuring the sealing and insulation performance of the disconnector assembly in the closed state. This prevents environmental contamination of the conductor formed by the stationary contact, moving contact, and disconnector assembly, such as external moisture or dust entering the switch and causing disruption to the normal operation of the system circuit. It also optimizes the insulation path of the structure, significantly improves the sealing and insulation performance of the high-voltage disconnector, extends the service life of the structure, enhances its stability and reliability, and provides strong protection for the safe and stable operation of the power system.

[0044] To better enable the sealing cover to swing synchronously with the knife switch assembly in and out of the mounting groove, the sealing cover has an arc-shaped plate portion at the end near the stationary contact, which can swing synchronously with the knife switch assembly in and out of the mounting groove. This arc-shaped plate portion design reduces resistance to swinging and facilitates the synchronous swinging of the sealing cover with the knife switch assembly in and out of the mounting groove.

[0045] In this embodiment, the outer wall of the insulating mounting shell is provided with a plurality of insulating awnings evenly distributed along its length and extending outward. These insulating awnings insulate the outer wall of the mounting shell; of course, the insulating awnings can also be understood as insulating skirts. Multiple such structures arranged at intervals effectively disperse the electric field intensity, prevent partial discharge, and ensure uniform electric field distribution, avoiding local voltage concentration. The smooth surface design of the insulating awnings helps reduce the adhesion of dirt and prevents increased leakage current due to a humid environment.

[0046] In summary, this utility model embodiment provides a high-voltage disconnecting switch with good sealing and insulation properties, which has the following advantages:

[0047] I. By combining a base, stationary contact, moving contact, disconnector assembly, insulating mounting shell, and insulating sealing cover, one end of the disconnector assembly is hinged to the stationary contact, while the other end can swing in and out of the mounting slot relative to the insulating frame and can be locked with the moving contact to achieve electrical conduction. An insulating sealing cover is provided on the disconnector assembly to fit and seal with the slot opening, and the insulating sealing cover swings synchronously with the disconnector assembly. This combined design of the insulating mounting shell and insulating sealing cover effectively protects and positions the disconnector assembly, ensuring its sealing and insulation performance in the closed state. It prevents environmental contamination of the conductor formed by the stationary contact, moving contact, and disconnector assembly, such as external moisture or dust entering the switch and disrupting the normal operation of the system circuit. This optimizes the insulation path of the structure, significantly improves the sealing and insulation performance of the high-voltage disconnector, extends the service life of the structure, enhances its stability and reliability, and provides strong protection for the safe and stable operation of the power system.

[0048] Second, the insulating frame is provided with a first connecting end, a second connecting end, and a third connecting end. The second connecting end and the third connecting end are integrally formed with the insulating mounting shell, such as by injection molding. The structural design is reasonable, which enhances the connection stability of the structure, optimizes the installation of the structure, makes the installation simpler, and is easy to maintain. It has high practical value and promotion prospects.

[0049] Third, through the multiple insulation designs of the insulating frame, insulating mounting shell and insulating sealing cover, the insulation performance of the high-voltage disconnect switch is effectively improved, ensuring safe operation under high-voltage environment.

[0050] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A high-voltage isolating switch with good sealing and insulation, comprising a base, a static contact, a moving contact and a knife switch assembly; characterized in that, Also include: The insulating frame body has a first connecting end, a second connecting end and a third connecting end; the insulating frame body is connected with the first connecting end; The insulating mounting shell is integrally formed with the second connecting end and the third connecting end; the insulating mounting shell has a setting slot; the static contact and the dynamic contact are respectively connected with two ends of the insulating mounting shell; the knife switch assembly is arranged in the setting slot; One end of the knife switch assembly is hinged with the static contact, and the other end can swing in and out of the setting slot relative to the insulating frame body and can be locked with the dynamic contact; The insulating sealing cover is connected on the knife switch assembly and can be matched with the slot opening of the setting slot to seal cover, and can swing synchronously with the knife switch assembly.

2. The high-voltage disconnector with good sealing and insulation according to claim 1, characterized in that, The insulating frame body is Y-shaped, U-shaped or V-shaped.

3. The high-voltage disconnector with good sealing and insulation according to claim 1, characterized in that, Two ends of the insulating mounting shell are respectively provided with a first clamping opening and a second clamping opening which are communicated with the setting slot; the two ends of the insulating mounting shell are provided with a first sealing sleeve cover and a second sealing sleeve cover corresponding to the first clamping opening and the second clamping opening; The static contact includes a first wiring terminal and a static contact part; the static contact part is connected in the setting slot and is hinged with one end of the knife switch assembly; one end of the first wiring terminal is matched and embedded in the first clamping opening and is integrally formed with the first wiring terminal, and the other end extends out of the insulating mounting shell; the first sealing sleeve cover is sleeved on one end of the first wiring terminal and is matched and clamped on the first clamping opening; The dynamic contact includes a second wiring terminal and a dynamic contact part; the dynamic contact part is connected in the setting slot and is locked with the other end of the knife switch assembly; one end of the second wiring terminal is matched and embedded in the second clamping opening and is integrally formed with the second wiring terminal, and the other end extends out of the insulating mounting shell; the second sealing sleeve cover is sleeved on one end of the second wiring terminal and is matched and clamped on the second clamping opening.

4. The high-voltage disconnector with good sealing and insulation according to claim 3, characterized in that, The first sealing sleeve cover includes a first sleeve ring matched and sleeved on one end of the first wiring terminal, a first sealing cover connected with the first sleeve ring and matched and clamped on the first clamping opening, and a shielding part connected with the first sealing cover and used for shielding the hinge between one end of the knife switch assembly and the static contact; The second sealing sleeve cover includes a second sleeve ring matched and sleeved on one end of the second wiring terminal and a first sealing cover connected with the second sleeve ring and matched and clamped on the second clamping opening.

5. The high-voltage disconnector with good sealing and insulation according to claim 3, characterized in that, The static contact part and the dynamic contact part are installed in the setting slot through positioning screws.

6. The high-voltage disconnector with good sealing and insulation properties according to claim 1, characterized in that, The insulating sealing cover includes a sealing cover plate body and cover clamping plates; two cover clamping plates are located on two sides of the knife switch assembly and are connected with the knife switch assembly and the sealing cover plate body; The sealing cover plate body is matched with the slot opening of the setting slot to seal cover and can swing synchronously with the knife switch assembly in and out of the setting slot.

7. The high-voltage disconnector with good sealing and insulation properties according to claim 6, characterized in that The sealing cover plate body has an arc plate body part near one end of the static contact which can swing synchronously with the knife switch assembly in and out of the setting slot.

8. The high-voltage disconnector with good sealing and insulation properties according to claim 7, characterized in that The cover clamping plate is connected with the knife gate assembly through mounting screws.

9. The high-voltage disconnector with good sealing and insulation properties according to claim 1, characterized in that, The outer wall of the insulating mounting shell is provided with a plurality of insulating petals which are uniformly arranged along the length of the outer wall and extend outward.

10. The high-voltage disconnector with good sealing and insulation properties according to claim 1, characterized in that, The insulating frame body is connected with the first connecting end through at least three positioning bolts.

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