High-voltage isolating switch with arc extinguishing function
By designing enclosed space structures for the moving and stationary contacts in high-voltage disconnect switches, combined with flammable coatings and arc-extinguishing gaps, the problem of high-voltage disconnect switches lacking arc-extinguishing capabilities has been solved, resulting in simplified operation and improved safety.
Patent Information
- Application Number
- CN202422767954.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-11-12
AI Technical Summary
High-voltage disconnect switches lack arc-extinguishing capabilities, resulting in complex operation, safety risks, and high maintenance costs.
Design a high-voltage disconnect switch with arc extinguishing function. By forming a closed space between the moving contact and the stationary contact, and utilizing the gas-generating part of the moving contact coated with a flammable coating and the arc-extinguishing gap of the stationary contact, the arc extinguishing function is realized in the closed space, simplifying operation and improving safety.
This has enabled convenient operation and improved safety of high-voltage disconnect switches, reduced the need for additional equipment, and decreased maintenance costs.
Smart Images
Figure CN223693039U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a high voltage disconnecting switch with arc extinguishing function, especially with an arc extinguishing device separated from the high voltage disconnecting switch. BACKGROUND
[0002] The high voltage disconnecting switch is an important switch electric appliance in the electrical system of power plant and transformer substation, and its main function is to ensure the safety of high voltage electric appliance and device during maintenance work, to play the role of isolating voltage, and cannot be used for cutting off, putting in load current and breaking short-circuit current, and can only be used for some switching operations without strong arc, that is, it does not have arc extinguishing function and arc extinguishing device. Therefore, the high voltage disconnecting switch usually needs to be matched with the high voltage circuit breaker to realize the function of protecting the device (electrical equipment in the circuit) by enabling and breaking (closing and opening) the circuit or automatically cutting off the fault circuit when the current exceeds the rated current of the device or the current-carrying capacity of the conductor due to overload, short circuit, arc or grounding fault in the circuit.
[0003] In order to solve the technical problem that the high voltage disconnecting switch does not have arc extinguishing capability, the authorized utility model patent CN 220324355 U as prior art provides a disconnecting switch with arc extinguishing mechanism. The disconnecting switch is similar in structure to the traditional high voltage disconnecting switch. However, both of the two contacts are exposed, and an arc extinguishing cover with multiple arc extinguishing grids is installed on one of the contacts, and a control box with a battery and a controller is arranged at the bottom of the knife head near the other contact, so as to realize the opening and arc extinguishing of the disconnecting switch through electric control. Although this design integrates the arc extinguishing function into the structure of the disconnecting switch, the electric controller installed on the knife head part brings potential safety risk to the opening and closing of the disconnecting switch, for example, the possibility of electric conduction part being pierced by arc due to the shortening of creepage distance caused by too many electric conduction parts near the breaking knife head during breaking current and electric control arc extinguishing operation, which shortens the service life of the disconnecting switch and further brings safety risk to the operator.
[0004] In view of the defect that the live parts of the high-voltage disconnecting switch are exposed, another granted utility model patent CN 221407153 U as prior art provides a solution of a fully-enclosed outdoor high-voltage disconnecting switch. The high-voltage disconnecting switch provided therein is enclosed into a shell, and the shell is further provided with a gas bag pushing mechanism, a connecting plate and an inflator. When the worker needs to turn on the current of the two insulators, the spring is manually stretched, and then the hook rod is hung on the inner wall of the ring-shaped plate at the top end of the other insulator, and then the baffle is turned to coincide with the square notch at the top of the shell. When the worker needs to turn off the power, the inflator is started first, and the gas bag is inflated through the hose. The gas bag can only push the push plate to move because it is limited by the limiting cylinder, so the hook rod is separated from the ring-shaped plate, and the connecting plate is turned outward to make the two insulators lose power and exchange the phenomenon of power-off. Although this design effectively protects the work safety of the operator through the fully-enclosed structure, the excessive conductive parts directly arranged on the high-voltage disconnecting switch bring risks to the operation safety, and also make the high-voltage operation process more complex. Moreover, the automatic inflator added to the disconnecting switch in the sealed disconnecting switch shell not only increases the maintenance cost, but also increases the risk of arc breakdown caused by accidents in the breaking process. Utility model content
[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the high-voltage disconnecting switch without arc extinguishing device, more complex operation process, increased maintenance cost and safety.
[0006] In view of this, the utility model provides a high-voltage disconnecting switch with arc extinguishing function, which comprises a moving contact shell, a static contact base, a moving contact and a static contact. Among them, the moving contact shell is provided with a pair of flow guide covers arranged symmetrically along the longitudinal center axis of the moving contact shell on one side of the substantially rectangular shell base, and has a shell hook ring on the side of the shell base away from the flow guide cover; the static contact base is provided with a pair of base flow guides on one side of the substantially rectangular base base, and a pair of wire terminals are arranged on the side away from the base flow guide; the moving contact has a rod-shaped moving contact base, and a moving contact opening and closing part and a moving contact gas generating part are arranged on the moving contact base in the direction away from the moving contact joint part; the static contact has a cylindrical sleeve-shaped static contact base, a conical static contact arc extinguishing part and a static contact joint part with reduced radial dimension from the static contact arc extinguishing part, wherein a plurality of static contact arc extinguishing gaps are arranged along the axial direction from the static contact arc extinguishing part to the static contact joint part.
[0007] In the non-limiting embodiment according to the utility model, the moving contact arranged in the fairing of the moving contact shell and the static contact arranged in the base fairing of the static contact base can be engaged in a shape fitting manner and form a closed space, and the moving contact opening and closing part of the moving contact is located near the joint of the static contact arc extinguishing part and the static contact base in the closed state.
[0008] In the non-limiting embodiment according to the utility model, the moving contact shell further has a guiding part on the side of the shell base body away from the shell hook ring; the static contact base further has a base guiding part on the side facing the guiding part of the moving contact shell; wherein the guiding part of the moving contact shell and the base guiding part of the static contact base have a complementary structure capable of moving relative to the axial center line.
[0009] In the non-limiting embodiment according to the utility model, the moving contact opening and closing part of the moving contact is located at a position of one third of the length of the moving contact base body and is made of tungsten copper.
[0010] In the non-limiting embodiment according to the utility model, the moving contact gas generating part of the moving contact is coated with a combustible coating.
[0011] In a specific embodiment according to the utility model, the combustible coating of the moving contact gas generating part of the moving contact is a melamine coating.
[0012] In the non-limiting embodiment according to the utility model, the maximum axial length of the melamine coating of the moving contact gas generating part 123 is 9 cm under the condition that the maximum rated load voltage is 35 kV; and the maximum axial length of the melamine coating of the moving contact gas generating part 123 is 4 cm under the condition that the maximum rated load voltage is 10 kV.
[0013] In the non-limiting embodiment according to the utility model, the plurality of static contact arc extinguishing gaps of the static contact are arranged in a circumferential uniform manner on the outer periphery of the static contact arc extinguishing part and the moving contact guiding part and have substantially the same axial length.
[0014] In the non-limiting embodiment according to the utility model, the maximum rated load voltage applicable thereto is 35 kV and the maximum rated current is 200 A.
[0015] In the non-limiting embodiment according to the utility model, the pair of wiring terminals of the static contact base is located directly below the pair of base fairings.
[0016] In the non-limiting embodiment according to the utility model, an insulator mounting part for mounting an insulator is further provided on the side of the base base body of the static contact base transverse to the base base body.
[0017] Therefore, the high-voltage disconnecting switch with arc extinguishing function can seal the movable contact and the static contact in a relatively narrow space, so that the risk of the charged components, such as the open contact and the opening and closing knife arranged on the traditional high-voltage disconnecting switch, in the extreme situation caused by natural disasters or animal entanglement can be overcome.
[0018] Some of the other features and advantages of the present application will be apparent from the description that follows, and it is intended to cover any alternatives, modifications, additions or omissions as can be included within the scope and spirit of the present application. Other objects and advantages of the application will be apparent from the following detailed description, which, when taken in conjunction with the drawings, illustrate, by way of example, the principles of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0019] The drawings incorporated in and forming a part of the specification, illustrate preferred embodiments of the present application and, together with the description, serve to explain the principles of the application. In the drawings:
[0020] Figure 1 Fig. 1 shows a three-dimensional exploded view of a non-limiting embodiment of a high-voltage disconnecting switch with arc extinguishing function according to the present application, which specifically shows the structure of the arc extinguishing device;
[0021] Figure 2 Fig. 2 shows a three-dimensional perspective view of a movable contact housing of the high-voltage disconnecting switch with arc extinguishing function according to the present application; Figure 1
[0022] Figure 3 Fig. 3 shows a three-dimensional perspective view of a static contact base of the high-voltage disconnecting switch with arc extinguishing function according to the present application; Figure 1
[0023] Figure 4 Fig. 4 shows a three-dimensional perspective view of a static contact of the high-voltage disconnecting switch with arc extinguishing function according to the present application; Figure 1
[0024] Figure 5 Fig. 5 shows a front view of the movable contact combined with the flow guide cover of the high-voltage disconnecting switch with arc extinguishing function according to the present application; Figure 1
[0025] Figure 6 Fig. 6 shows a cross-sectional view of the base flow guide combined with the static contact in a non-limiting embodiment of the high-voltage disconnecting switch with arc extinguishing function, which specifically shows the relative position of the two;
[0026] Figure 7 Fig. 7 shows the general structure of the movable contact in a non-limiting embodiment of the high-voltage disconnecting switch with arc extinguishing function;
[0027] Figure 8 A state in which a moving contact is combined to a static contact assembled to a base flow conductor in a non-limiting embodiment of a high-voltage disconnector with arc extinguishing function is shown.
[0028] Reference signs
[0029] High-voltage disconnector with arc extinguishing function - 100
[0030] Moving contact housing - 110 Housing base - 111 Housing hook - 112 Flow cover - 113 Moving contact receiving part - 1131 Guide member - 114 Housing guide part - 115
[0031] Moving contact - 120 Moving contact base - 121 Moving contact opening and closing part - 122 Moving contact gas generating part - 123 Moving contact combining part - 124
[0032] Static contact base - 130 Base base - 131 Base flow conductor - 132 Static contact mounting part - 1321 Insulator mounting part - 133 Base guide part - 134
[0033] Static contact - 140 Static contact base - 141 Static contact arc extinguishing part - 142 Static contact arc extinguishing gap - 143 Static contact combining part - 144 Moving contact guide part - 145
[0034] Terminal - 150 DETAILED DESCRIPTION
[0035] The utility model will be described below in combination with the drawings, and it should be understood that the following listed examples are only used to illustrate the technical scheme of the utility model, and are not limited to the utility model. The drawings are provided to present multiple embodiments of the utility model, but the drawings do not have to be drawn according to the size of the specific embodiment, and some features can be enlarged, removed or partially cut to better show and explain the disclosure of the utility model. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar language appearing in the specification does not necessarily refer to all drawings or examples.
[0036] Some directional terms used to describe the drawings in the following, such as "inner", "outer", "upper", "lower", "top", "bottom" and other directional terms will be understood to have their normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms described in the specification are basically in accordance with the conventional direction understood by those skilled in the art.
[0037] The terms "first", "the first", "second", "the second", and similar terms used in the present utility model do not indicate any order, number or importance in the present utility model, but are used to distinguish one part from other parts. The "generally" expression allows for a reasonable range of angular deviation, and is not absolutely identical.
[0038] Some embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
[0039] To solve the above technical problems, the present utility model provides a high-voltage disconnecting switch 100 with arc extinguishing function, which is formed into a closed integrated structure by a movable contact shell 110 and a static contact base 130 that can be mutually engaged. Further, the high-voltage disconnecting switch 100 with arc extinguishing function also has a movable contact 120 with a specific structure arranged in the movable contact shell 110, and a static contact 140 arranged in the static contact base 130 and mutually conforming to the movable contact 120, so as to realize the arc extinguishing function under the rated load voltage and rated load current during the breaking process of the movable contact 120 and the static contact 140 in the relatively closed space formed by the movable contact shell 110 and the static contact base 130, thereby improving the convenience and safety of the operation of the high-voltage disconnecting switch during the breaking process, and avoiding the arrangement of an additional circuit breaker in the circuit of the electrical system of the outdoor site or the power plant and the transformer substation.
[0040] Referring to Figure 1 and Figure 2 In a non-limiting embodiment according to the present utility model, the movable contact shell 110 has a generally rectangular shell base 111 extending transversely. The shell base 111 is provided with a fairing 113 on one side thereof, and preferably has two fairings 113. The two fairings 113 are symmetrically arranged on both sides of the longitudinal center axis of the movable contact shell 110, so as to be suitable for integral machining and manufacturing with the shell base 111, such as one-piece forming. Alternatively, the fairing 113 can also be a component independent of the shell base 111, so as to be replaced in the case of accident or damage. Preferably, the fairing 113 and the shell base 111 can be mechanically connected at opposite parts thereof, so as to be fastened and connected together by means such as threads, clamping, locking and the like. Alternatively, the fairing 113 can be configured as a cylindrical shell, and preferably as a conical shell, so as to provide a more reduced arc extinguishing space.
[0041] Referring to Figure 2In a specific embodiment according to the utility model, the shell base body 111 is provided with a shell hook ring 112 on the side opposite to the fairing 113, preferably, the shell hook ring 112 is located at the longitudinal central axis of the movable contact shell 110, so that the operator can realize the breaking of the high-voltage disconnecting switch 100 with arc extinguishing function in a more labor-saving manner. In particular, the shell base body 111 is also provided with a shell guide part 115 on the side with the fairing 113, which can be integrally formed or mechanically connected with the guide part 114. Preferably, the guide part 114 is also arranged at the longitudinal central axis of the movable contact shell 110, that is, the shell hook ring 112, the movable contact shell 110 and the guide part 114 have a common longitudinal central axis. More preferably, the guide part 114 is in the form of a rod.
[0042] In particular, the movable contact shell 110 is made of high-temperature-resistant material. Unlike traditional asbestos and clay, ceramic materials, the shell base body 111, the shell hook ring 112, the guide part 114, and in particular the outer surface of the fairing 113 according to the utility model are preferably made of arc-resistant BMC molding compound, and in particular made of epoxy resin with oxirane groups. The inner shell of the fairing 113, that is, the movable contact receiving part 1131 is embedded with a glass fiber tube to improve safety during arc extinguishing by taking advantage of the high-temperature resistance, acid and alkali corrosion resistance and excellent insulation of glass fiber, and effectively prevent the burning of the movable contact shell 110 caused by breaking the arc.
[0043] Referring to Figure 1 and Figure 3 In a non-limiting embodiment according to the utility model, the static contact base 130 is configured to have a generally complementary configuration to the movable contact shell 110. The static contact base 130 has a generally rectangular base body 131 which is substantially the same as the shell base body 111, and is configured with a base fairing 132 on the side of the base body 131 facing the fairing 113 of the movable contact shell 110. Further, the base fairing 13 also has a static contact mounting part 1321 for mounting the static contact 140. Preferably, the base fairing 132 is conformal to the fairing 113 arranged on the movable contact shell 110, and can be connected to the movable contact receiving part 1131 of the fairing 113 of the movable contact shell 110, thereby forming the closed space described above. The static contact base 130 is also provided with a base guide part 134 along its longitudinal central axis for the longitudinal movement of the guide part 114 of the movable contact shell 110, which is preferably a hole. In particular, the static contact base 130 is also configured to have an insulator mounting part 133 extending transversely from the base body 131, as shown in Figure 3to accommodate the installation of the insulator of the high-voltage disconnector in the prior art. Further, the base body 131 of the static contact base 130 is provided with a pair of terminal connectors 150 on the side away from the base flow conductor 132 to introduce external circuits into each static contact 140 in the static contact base 130. Preferably, the terminal connector 150 is configured as a cone-shaped body wrapped by an insulating material, and a conductive wire is arranged in the cone-shaped body.
[0044] In particular, the static contact base 130 should have good mechanical strength, corrosion resistance and environmental resistance. Unlike the conventional base made of steel frame, the base body 131 and the insulator mounting portion 133 of the static contact base 130 according to the present application are preferably made of silicone rubber or silicone to adapt to the application of the high-voltage disconnector in the outdoor natural environment by virtue of its high-temperature resistance, low-temperature resistance and good oxidation resistance. The base flow conductor 132 is made of the same material as the aforementioned flow cover 113, and its composition and function will not be described here.
[0045] In view of this, when the flow cover 113 of the moving contact housing 110 and the base flow conductor 132 of the static contact base 130 of the high-voltage disconnector 100 with arc extinguishing function according to the present application are conformally combined, the moving contact and the static contact can be enclosed in a relatively narrow space, that is, the risk of the open arrangement of the charged components such as the contact, the opening and closing knife and the like on the conventional high-voltage disconnector being harmed by extreme conditions such as natural disasters or animal entanglement can be overcome.
[0046] The high-voltage disconnector 100 with arc extinguishing function according to the present application also has a static contact configuration and a moving contact configuration different from the prior art and a jointing mode different from the prior art, so as to realize the arc extinguishing function in the breaking process by means of the arc extinguishing cavity formed by the static contact and the moving contact according to the present application, which will be described in detail below.
[0047] Referring to Figure 5 and Figure 7, the utility model discloses a movable contact 120 constructs the movable contact joint 124 that can pass through the fairing 113 of movable contact shell 110 and shell base body 111 and mechanically combines. The movable contact 120 has the copper movable contact base body 121 of rod shape, and movable contact opening and closing part 122 and movable contact gas generating part 123 are sequentially arranged on movable contact base body 121 in the direction of departing from the movable contact joint 124. Preferably, the movable contact joint 124 is structured with external thread for processing to be connected with the corresponding internal thread on the shell base body 111. Among them, the movable contact opening and closing part 122 is generally located in the length one third of movable contact base body 121, and is made of tungsten copper, and the movable contact gas generating part 123 is coated with flammable coating, especially melamine coating, to prevent the arc combustion generated when the movable contact and static contact break by using the performance of melamine releasing a large amount of nitrogen when heated decomposition.
[0048] Referring to Figure 4 And Figure 6 , according to the utility model discloses a static contact 140, the static contact base body 141 of generally cylindrical sleeve is constructed with the static contact arc extinguishing part 142 of cone at one end, preferably, the static contact base body 141 is still provided with static contact joint 144 at the end of departing from static contact arc extinguishing part 142, so that the static contact mounting part 1321 of base fairing 132 in the static contact base 130 can be joined to the static contact mounting part 1321 of base fairing 132 in the static contact base 130 in the form of thread, clamping or locking. Preferably, the radial dimension of the static contact arc extinguishing part 142 is reduced along the axial direction of the static contact joint 144, and then the static contact guide part 145 of equal diameter is formed at the end. In particular, a plurality of static contact arc extinguishing gaps 143 extending along the axial direction are further provided from the static contact arc extinguishing part 142 to the static contact guide part 145. Specifically, for the convenience of processing and manufacturing, the static contact arc extinguishing gaps 143 are arranged on the outer periphery of the static contact arc extinguishing part 142, and are constructed to have the same axial length. Preferably, the static contact mounting part 1321 of base fairing 132 in the static contact base 130 is preferably constructed to complementarily engage with the static contact joint 144 of static contact 140. One preferred example is that when the static contact joint 144 of static contact base body 141 is constructed as external thread, the static contact mounting part 1321 of static contact base 130 is constructed with internal thread.
[0049] According to a non-limiting embodiment of the utility model, in order to realize arc extinguishing function, the inventor of the utility model not only considers the complementary design of the rod-shaped configuration of the moving contact 120 and the sleeve-shaped configuration of the stationary contact 140, but also especially considers the engagement of the moving contact opening and closing part 122 of the moving contact 120 and the stationary contact arc extinguishing part 142 of the stationary contact 140 in the process of opening and closing. In the closed state, the moving contact opening and closing part 122 of the moving contact 120 is generally located at the joint of the stationary contact arc extinguishing part 142 and the stationary contact base body 141, and the specific location can be seen from Figure 8
[0050] In the installation, the two moving contacts 120 pass through the two fairings 113 arranged at the transverse end of the moving contact shell 110 respectively, so that the moving contact joint part 124 of each moving contact 120 is mechanically joined with the corresponding moving contact base body 121, and in the exemplary embodiment, the two are preferably screwed together by threads. Thus, the two moving contacts 120 are respectively located in the moving contact receiving part 1131. Then, the two stationary contacts 140 pass through the two base fairings 132 of the stationary contact base 130 respectively, so that the respective stationary contact joint part 144 is mechanically joined into the stationary contact mounting part 1321 of the base fairing 132. Then, the moving contact shell 110 with the moving contact 120 is inserted into the base guide part 134 by means of the guide part 114, so that the two fairings 113 of the moving contact shell 110 are respectively buckled to the two base fairings 132 of the stationary contact base 130. Thus, the moving contact gas generating part 123 and the moving contact joint part 124 of the moving contact 120 located in the fairing 113 pass through the moving contact guide part 145, the stationary contact arc extinguishing part 142 and the stationary contact base body 141 of the stationary contact 140 in turn. Thus, the assembled high-voltage disconnecting switch 100 with arc extinguishing function is formed.
[0051] In the assembled high-voltage disconnector 100 with arc-extinguishing function, the moving contact 120's moving contact opening / closing portion 122, i.e., the part made of tungsten steel, after entering the stationary contact arc-extinguishing portion 142 of the stationary contact 140, is generally located at the starting position of the stationary contact arc-extinguishing gap 143 near the columnar stationary contact base 141. This state can also be referred to as the closed state or the first state of the high-voltage disconnector. In particular, in this closed state or the first state, the moving contact base 121 of the moving contact 120 is clamped by the moving contact guide portion 145 with a reduced diameter to ensure a tight engagement between the moving contact 120 and the stationary contact 140, thereby forming a current path. When it is necessary to disconnect the high-voltage disconnector, the operator uses an insulating rod with a hook to hook the outer ring 112 of the moving contact housing 110 and applies an upward force. This causes the moving contact 120's moving contact opening / closing portion 122 and moving contact gas generating portion 123, located in the moving contact housing 110, to detach from the stationary contact 140 via the stationary contact arc extinguishing portion 142 and moving contact guide portion 145, guided by the guide member 114 along the longitudinal centerline. This state can also be referred to as the opening state or second state of the high-voltage disconnector. In this opening state or second state, the moving contact 120 and stationary contact 140 generate an electric arc during the opening movement, especially... Figure 8 A high-temperature, high-arc temperature is generated between the moving contact opening / closing portion 122 and the stationary contact arc-extinguishing portion 142. The arc is elongated by the movement of the moving contact opening / closing portion 122 and enters the stationary contact arc-extinguishing gap 143. Simultaneously, during the opening movement of the moving contact 120 and stationary contact 140, the gas-generating portion 123 of the moving contact 120, due to its flammable coating, particularly the melamine coating, begins to burn, generating nitrogen gas. This nitrogen gas applies airflow pressure to the elongated arc located within the stationary contact arc-extinguishing gap 143, causing the arc temperature within the gap to decrease. This creates an environment where the arc cannot continue to explode, extinguishing any sparks that the arc might generate, thus ensuring the safe use of the high-voltage disconnector during the opening process.
[0052] In the non-limiting embodiments according to the utility model, the higher the high-voltage voltage grade, the longer the coating length of the combustible coating, particularly the melamine coating, of the movable contact gas production portion 123 along the axial direction of the movable contact 120. In the testing process of the high-voltage disconnector 100 with arc extinguishing function according to the utility model, when the breaking voltage is 35 kV, the maximum axial length of the melamine coating of the movable contact gas production portion 123 is 9 cm; and when the breaking voltage is 10 kV, the maximum axial length of the melamine coating of the movable contact gas production portion 123 is 4 cm. The inventors of the utility model have also confirmed in the testing process that the high-voltage disconnector 100 with arc extinguishing function can be used for breaking at a maximum rated load voltage of 35 kV and a maximum rated current of 200 A, thereby reducing the additional overcurrent protection device. Further, the high-voltage disconnector with arc extinguishing function according to the utility model, which simultaneously seals the movable contact 120 and the static contact 140, also improves the safety and convenience of the high-voltage disconnector during use, and is simpler in structure and design than the prior art high-voltage disconnector and its arc extinguishing device, thereby reducing the manufacturing and use costs.
[0053] While specific embodiments of the present utility model have been illustrated and described, it will be apparent to those skilled in the art that many other changes and modifications can be made without departing from the spirit and scope of the present utility model. Accordingly, it is intended to cover all such changes and modifications that are within the scope of the present utility model as defined by the appended claims.
Claims
1. A high-voltage disconnector (100) with arc extinction, characterized in that The high-voltage disconnector comprises: a moving contact shell (110) provided with a pair of fairings (113) symmetrically arranged along a longitudinal center axis of the moving contact shell (110) on one side of a generally rectangular shell base body (111) of the moving contact shell (110), and provided with a shell hook ring (112) on a side of the shell base body (111) away from the fairings (113); a stationary contact base (130) provided with a pair of base fairings (132) on one side of a generally rectangular base base body (131) of the stationary contact base (130), and provided with a pair of terminal posts (150) on a side away from the base fairings (132); a moving contact (120) having a rod-shaped moving contact base body (121), and sequentially provided with a moving contact opening and closing part (122) and a moving contact gas generating part (123) on the moving contact base body (121) in a direction away from a moving contact engaging part (124) of the moving contact (120); a stationary contact (140) having a cylindrical stationary contact base body (141) and a conical stationary contact arc extinguishing part (142), and a stationary contact engaging part (144) with a reduced radial dimension starting from the stationary contact arc extinguishing part (142), wherein a plurality of stationary contact arc extinguishing gaps (143) extending in an axial direction are further provided from the stationary contact arc extinguishing part (142) to the stationary contact engaging part (144); wherein the moving contact (120) arranged in the fairings (113) of the moving contact shell (110) and the stationary contact (140) arranged in the base fairings (132) of the stationary contact base (130) are designed to be engaged in a form-fitting manner and form a closed space, and the moving contact opening and closing part (122) of the moving contact (120) is generally located near the junction of the stationary contact arc extinguishing part (142) and the stationary contact base body (141) in a closed state.
2. The high voltage disconnector (100) with arc extinction function according to claim 1, characterized in that The moving contact shell (110) is further provided with a guide part (114) on a side of the shell base body (111) away from the shell hook ring (112); the stationary contact base (130) is further provided with a base guide part (134) on a side facing the guide part (114) of the moving contact shell (110); wherein the guide part (114) of the moving contact shell (110) and the base guide part (134) of the stationary contact base (130) have a complementary structure that can move relative to the axial center line.
3. The high voltage disconnector (100) with arc extinction function according to claim 1, characterized in that, The moving contact opening and closing part (122) of the moving contact (120) is designed to be made of tungsten copper and is generally located at a position of one third of the length of the moving contact base body (121).
4. The high voltage disconnector (100) with arc extinction function according to claim 1, characterized in that, The moving contact gas generating part (123) of the moving contact (120) is coated with an inflammable coating.
5. The high voltage disconnector (100) with arc extinction function according to claim 4, characterized in that, The inflammable coating of the moving contact gas generating part (123) of the moving contact (120) is a melamine coating.
6. The high voltage disconnector (100) with arc extinction function according to claim 5, characterized in that, In a state where the maximum rated load voltage is 35 kilovolts, the maximum axial length of the melamine coating of the moving contact gas generating part (123) is 9 centimeters, or in a state where the maximum rated load voltage is 10 kilovolts, the maximum axial length of the melamine coating of the moving contact gas generating part (123) is 4 centimeters.
7. The high voltage disconnector (100) with arc extinction function according to claim 1, characterized in that, The plurality of static contact arc-extinguishing gaps (143) of the static contact (140) are arranged substantially uniformly in a circumferential direction on the outer periphery of the static contact arc-extinguishing portion (142) and the moving contact guide portion (145) and have substantially the same axial length.
8. The high voltage disconnector (100) with arc extinction function according to claim 1, characterized in that, The maximum rated load voltage applicable thereto is 35 kilovolts, and the maximum rated current is 200 amperes.
9. The high voltage disconnector (100) with arc extinction function according to claim 1, characterized in that, A pair of wiring terminals (150) of the static contact base (130) is located directly below the pair of base flow guides (132).
10. The high voltage disconnector (100) with arc extinction function according to claim 1, characterized in that, An insulator mounting portion (133) for mounting an insulator is further provided on one side of a base base body (131) of the static contact base (130) in a transverse direction. An insulator mounting portion (133) for mounting an insulator is further provided on one side of a base base body (131) of the static contact base (130) in a transverse direction.