An isolating blade and isolating switch

Abstract

The application discloses an isolating blade, which comprises an isolating blade with a movable contact part for electrically connecting with a static contact, the movable contact part comprises a plurality of contact fingers, and a gap is arranged between two adjacent contact fingers; a magnetic lock plate is arranged for pressing the isolating blade, the magnetic lock plate comprises a magnetic lock plate body and a pressing force adjusting column arranged on the magnetic lock plate body, the length of the pressing force adjusting column which is convex to the magnetic lock plate body is adjustable, and the pressing force adjusting column is in one-to-one pressing contact with each contact finger. The application can reduce the manufacturing, installation and debugging cost of a large-current isolating switch, and the pressure of the contact surface is more convenient to adjust, the pressure is uniform, the contact surface is good, and the contact pressure can reach more than 2000N through test, so that good dynamic and thermal stability is achieved. The application further discloses an isolating switch with the isolating blade.

Description

Technical Field

[0001] This invention relates to the field of disconnecting switch technology, and more particularly to a disconnecting knife switch and a disconnecting switch. Background Technology

[0002] In the past, high-current indoor high-voltage disconnecting switches needed to have dynamic and thermal stability to prevent burnout of the moving and stationary contacts. Typically, to verify the dynamic and thermal stability of high-current indoor high-voltage disconnecting switches, dynamic and thermal stability tests are conducted. These tests include short-time withstand current and peak withstand current tests to verify the disconnecting switch's ability to withstand electrodynamic forces and heat generation when closed.

[0003] In existing technology, the isolating blade of a disconnecting switch includes an isolating blade and magnetic locking plates disposed on both sides of the isolating blade. The magnetic locking plates are used to press the isolating blade against the stationary contact. In existing technology, the isolating blade is a single piece. When the disconnecting switch is closed, the isolating blade contacts the entire surface of the stationary contact. The thickness of the blade represents a key performance parameter of the disconnecting switch; that is, for high-current disconnecting switches, a thicker isolating blade is required to meet performance requirements. The thicker the isolating blade, the higher its strength and the less prone it is to deformation. Although the disconnecting switch has magnetic locking plates that apply pressure to the isolating blade to keep the two blades clamping the stationary contact, if the isolating blade is too thick, there is a problem of insufficient and uneven contact pressure between the blade and the stationary contact, leading to poor dynamic and thermal stability of the disconnecting switch.

[0004] Therefore, how to improve the dynamic and thermal stability of disconnecting switches is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an isolating switch to improve the dynamic and thermal stability performance of the isolating switch;

[0006] Another object of the present invention is to provide a disconnecting switch having the above-mentioned disconnecting knife.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An isolating switch, comprising:

[0009] An isolating blade having a movable contact head for electrical connection with a stationary contact head, the movable contact head including a plurality of contact fingers with a gap between adjacent contact fingers;

[0010] A magnetic locking plate is used to press the isolation blade. The magnetic locking plate includes a magnetic locking plate body and a pressing force adjusting column disposed on the magnetic locking plate body. The length of the pressing force adjusting column protruding out of the magnetic locking plate body is adjustable. The pressing force adjusting column is pressed and engaged with each of the contact fingers in a one-to-one correspondence.

[0011] Optionally, in the above-mentioned isolating switch, the isolating blade includes a main blade and a detachable contact finger disposed at one end of the main blade.

[0012] Optionally, in the above-mentioned isolating switch, the main blade includes a blade body and a blade mounting portion located at one end of the blade body for mounting the contact finger, wherein the thickness of the blade mounting portion is less than the thickness of the blade body;

[0013] The finger includes a finger body and a finger mounting portion located at one end of the finger body for fitting and connecting with the blade mounting portion. The thickness of the finger mounting portion is less than the thickness of the finger body. The thickness of the finger body is the same as the thickness of the blade body. The sum of the thicknesses of the blade mounting portion and the finger mounting portion is the same as the thickness of the blade body.

[0014] Optionally, in the above-mentioned isolating switch, the two surfaces of the blade body along the thickness direction are the first blade surface and the second blade surface, respectively, and one side surface of the blade mounting part is located in the same plane as the first blade surface, so that an insert notch is formed between the blade mounting part and the second blade surface;

[0015] The finger mounting portion is inserted into the mounting notch and fits against the blade mounting portion, and is fixedly connected.

[0016] Optionally, in the above-mentioned isolating switch, one end of the main blade is formed with a contact finger seat corresponding to each contact finger, and two adjacent contact finger seats are separated by a cutting slit, and the contact finger is detachably installed on the contact finger seat.

[0017] Optionally, in the above-mentioned isolating switch, the contact seat includes a first contact seat and a second contact seat, and there are multiple first contact seats and second contact seats, which are staggered. The length of the first contact seat is greater than the length of the second contact seat.

[0018] The contact finger includes a first contact finger and a second contact finger, and there are multiple first contact fingers and multiple second contact fingers. The length of the second contact finger is greater than the length of the first contact finger. The first contact finger is detachably fixed to the first contact finger base, and the second contact finger is detachably fixed to the second contact finger base.

[0019] Optionally, in the above-mentioned isolation switch, the end faces of the first contact finger and the second contact finger at the ends away from the main blade are located in the same plane.

[0020] Optionally, in the above-mentioned isolating switch, the main blade includes a blade body and a contact finger seat. The contact finger seat includes a contact finger seat body and a blade mounting portion located at one end of the contact finger seat body for mounting the contact finger. The thickness of the blade mounting portion is less than the thickness of the contact finger seat body, and the thickness of the contact finger seat body is the same as the thickness of the blade body.

[0021] The finger includes a finger body and a finger mounting portion located at one end of the finger body for fitting and connecting with the blade mounting portion. The thickness of the finger mounting portion is less than the thickness of the finger body. The thickness of the finger body is the same as the thickness of the finger base body. The sum of the thicknesses of the blade mounting portion and the finger mounting portion is the same as the thickness of the finger base body.

[0022] Optionally, in the above-mentioned isolating switch, the two surfaces of the blade body along the thickness direction are the first blade surface and the second blade surface, respectively, and the two surfaces of the contact finger seat body along the thickness direction are located in the same plane as the first blade surface and the second blade surface, respectively;

[0023] One side surface of the blade mounting portion is located in the same plane as the first blade surface, so that an insert notch is formed between the blade mounting portion and the second blade surface;

[0024] The finger mounting portion is inserted into the mounting notch and fits against the blade mounting portion, and is fixedly connected.

[0025] Optionally, in the above-mentioned isolating switch, the isolating blades are two blades arranged in parallel. Each of the two main blades has a fixing strip on one side facing each other. The fixing strip is located at the position of the contact finger seat and is fixed to the contact finger seat by fasteners. A pull rod connecting the two main blades is provided at the fixing strip. A support sleeve is sleeved on the pull rod, and the two ends of the support sleeve abut against the fixing strip.

[0026] Optionally, in the above-mentioned isolating switch, the contact finger seat and the contact finger are fixed by screws, the contact finger seat is provided with a mounting screw hole that is threaded with the screw, and the contact finger is provided with a fixing hole for the screw to pass through.

[0027] Optionally, in the above-mentioned isolating switch, the two sides of the magnetic lock plate are bent toward the side where the first surface of the magnetic lock plate is located to form a reinforcing folding plate, and the clamping force adjusting column protrudes from the second surface of the magnetic lock plate. The first surface and the second surface of the magnetic lock plate are two opposing surfaces.

[0028] Optionally, in the above-mentioned isolating gate, the clamping force adjusting column is a threaded component.

[0029] The isolating switch provided by this invention features multiple contact fingers on the moving contact head, which is electrically connected to the stationary contact. These contact fingers are spaced apart, meaning the part electrically connected to the moving contact is divided into multiple segments. This results in each contact finger having a width much smaller than the width of the isolating blade, making it more prone to elastic deformation and exhibiting better toughness. Furthermore, this invention includes a clamping force adjusting post on the magnetic locking plate. This post abuts against the contact fingers to maintain a good electrical connection between the fingers and the stationary contact. The length of the clamping force adjusting post protruding from the magnetic locking plate is adjustable. By adjusting this protrusion, the clamping force on the corresponding contact finger can be adjusted, thereby regulating the contact pressure between each contact finger and the stationary contact. This ensures uniform contact pressure between the contact fingers and the stationary contact, overcoming the problem of poor dynamic and thermal stability in isolating switches.

[0030] This invention reduces the manufacturing, installation, and commissioning costs of high-current disconnect switches, makes the pressure on the contact surface easier to adjust, ensures uniform pressure when applied individually, and provides good contact surface performance. Tests have shown that the contact pressure can reach over 2000N, thus achieving excellent dynamic and thermal stability.

[0031] The present invention also provides a disconnecting switch, including a disconnecting knife, wherein the disconnecting knife is the disconnecting knife as described in any of the preceding claims. Because it has the aforementioned disconnecting knife, it possesses all the technical effects of the aforementioned disconnecting knives, which will not be elaborated upon here. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the isolating switch disclosed in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the main blade structure disclosed in an embodiment of the present invention;

[0035] Figure 3 This is a cross-sectional schematic diagram of the main blade at the first contact finger seat, as disclosed in an embodiment of the present invention;

[0036] Figure 4 This is a cross-sectional schematic diagram of the main blade at the second contact finger seat, as disclosed in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the finger disclosed in an embodiment of the present invention;

[0038] Figure 6 This is a cross-sectional schematic diagram of the first finger disclosed in an embodiment of the present invention;

[0039] Figure 7 This is a cross-sectional schematic diagram of the second finger disclosed in an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the structure of the magnetic locking plate body disclosed in an embodiment of the present invention;

[0041] Figure 9 This is a side view of the magnetic lock plate disclosed in an embodiment of the present invention.

[0042] The meanings of the various reference numerals in the figure are as follows:

[0043] 100 is the main blade, 101 is the blade body, 1011 is the first blade surface, 1012 is the second blade surface, 102 is the first contact finger seat, 1021 is the first blade mounting part, 1022 is the first insert notch, 1023 is the first mounting screw hole, 103 is the second contact finger seat, 1031 is the second blade mounting part, 1032 is the second insert notch, 1033 is the second mounting screw hole, and 104 is the cutting slit.

[0044] 200 is a contact finger, 201 is the first contact finger, 2011 is the first contact finger mounting part, 2012 is the first contact finger notch, 2013 is the first fixing hole, 2014 is the first contact finger body, 202 is the second contact finger, 2021 is the second contact finger mounting part, 2022 is the second contact finger notch, 2023 is the second fixing hole, and 2024 is the second contact finger body;

[0045] 300 is a fixed strip;

[0046] 400 is the magnetic locking plate, 401 is the magnetic locking plate body, 4011 is the reinforcing folding plate, 4012 is the threaded hole, and 402 is the clamping force adjustment column. Detailed Implementation

[0047] The core of this invention is to provide an isolating switch to improve the dynamic and thermal stability of the isolating switch;

[0048] Another key aspect of this invention is to provide a disconnecting switch having the aforementioned disconnecting knife.

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] like Figure 1 and Figure 9 As shown in the figure, an embodiment of the present invention discloses an isolation switch including an isolation blade and a magnetic locking plate 400.

[0051] The isolating blade has a moving contact head for electrical connection with the stationary contact. The moving contact head includes multiple contact fingers 200, with a gap between adjacent contact fingers 200. This gap can be achieved by wire cutting, or other methods. There are generally two isolating blades arranged parallel and spaced apart. When the circuit is closed, the two isolating blades clamp the stationary contact to achieve electrical connection.

[0052] According to electromagnetic theory, when currents flow in the same direction through two parallel isolating blades, they generate an electromagnetic force that attracts each other. Therefore, each pole of the isolating switch consists of two isolating blades. When a fault current occurs in a phase and is very large, the two isolating blades can clamp the stationary contact tightly with a large electromagnetic force. This avoids the danger of phase-to-phase short circuits caused by arcing due to loose isolating blades, as well as the possibility of welding between the isolating blades and the stationary contact due to arcing. The isolating blades are usually operated by rotation. During normal operation, the isolating switch can be easily opened and closed by overcoming the frictional pressure of the spring.

[0053] The magnetic locking plate 400 is used to press the isolating blade. The magnetic locking plate 400 is generally pressed onto the isolating blade by a spring. The pressing structure of the magnetic locking plate 400 is the same as in existing technology and will not be described again here. The magnetic locking plate 400 includes a magnetic locking plate body 401 and a pressing force adjusting post 402 disposed on the magnetic locking plate body 401. The length of the pressing force adjusting post 402 protruding from the magnetic locking plate body 401 is adjustable. The pressing force adjusting post 402 is pressed into contact with each contact finger 200 in a one-to-one manner.

[0054] The isolating switch provided by this invention has multiple contact fingers 200 on the moving contact head that is electrically connected to the stationary contact. Each contact finger 200 has a gap between it. In other words, this invention divides the part electrically connected to the moving contact into multiple parts, making the width of each contact finger 200 much smaller than the width of the isolating blade. Therefore, the contact fingers 200 are more prone to elastic deformation and have better toughness than the isolating blade. This invention also provides a clamping force adjusting post 402 on the magnetic locking plate 400. The clamping force adjusting post 402 abuts against the contact fingers 200 to clamp the contact fingers 200 and maintain a good electrical connection with the stationary contact. The length of the clamping force adjusting column 402 protruding from the magnetic lock plate 401 is adjustable. By adjusting the length of the clamping force adjusting column 402 protruding from the magnetic lock plate 401, the clamping force on the corresponding contact finger 200 can be adjusted, thereby adjusting the contact pressure between each contact finger 200 and the stationary contact, thus ensuring the uniformity of the contact pressure between each contact finger 200 and the stationary contact, thereby overcoming the problem of poor dynamic and thermal stability of the disconnecting switch.

[0055] This invention reduces the manufacturing, installation, and commissioning costs of high-current disconnect switches, makes the pressure on the contact surface easier to adjust, ensures uniform pressure when applied individually, and provides good contact surface performance. Tests have shown that the contact pressure can reach over 2000N, thus achieving excellent dynamic and thermal stability.

[0056] In one specific embodiment of the present invention, the isolation blade includes a main blade 100 and a detachable contact finger 200 disposed at one end of the main blade 100. That is, in this embodiment, the isolation blade is divided into two parts: the main blade 100 and the contact finger 200, and the contact finger 200 is detachably fixed to the main blade 100. If one of the contact fingers 200 is damaged or welded, only that contact finger 200 can be replaced, resulting in low maintenance and repair costs.

[0057] like Figure 2 As shown, in order to facilitate the installation of the finger 200 and the main blade 100, in this embodiment, the main blade 100 includes a blade body 101 and a blade mounting portion located at one end of the blade body 101 for mounting the finger 200. The thickness of the blade mounting portion is less than the thickness of the blade body 101, which can be achieved by wire cutting at the position of the blade mounting portion to reduce the thickness of the end of the main blade 100.

[0058] The contact finger 200 includes a contact finger body and a contact finger mounting portion located at one end of the contact finger body for attachment and connection with the blade mounting portion. The thickness of the contact finger mounting portion is less than the thickness of the contact finger body, which can be achieved by reducing the thickness of the end of the contact finger 200 at the location of the contact finger mounting portion through wire cutting. The thickness of the contact finger body is the same as the thickness of the blade body 101, and the sum of the thicknesses of the blade mounting portion and the contact finger mounting portion is the same as the thickness of the blade body 101.

[0059] In this embodiment, the thickness of the end of the main blade 100 is reduced by wire cutting to form a blade mounting portion, and correspondingly, the thickness of the end of the finger 200 is reduced by wire cutting to form a finger mounting portion. To ensure that the sum of the thicknesses of the blade mounting portion and the finger mounting portion is the same as the thickness of the blade body 101, the thickness dimension of the reduced end of the main blade 100 should be equal to the thickness dimension of the finger mounting portion; correspondingly, the thickness dimension of the reduced end of the finger 200 should be equal to the thickness dimension of the blade mounting portion. This ensures that after the blade mounting portion and the finger mounting portion are fitted together, the thickness at the overlap of the blade mounting portion and the finger mounting portion is the same as the thickness of the blade body 101 and the finger body. This configuration allows the finger 200, after being mounted on the main blade 100, to have the same shape and thickness as existing one-piece isolation blades. This embodiment of the invention is a design that cuts and reassembles a conventional one-piece isolation blade without changing its working principle or overall design dimensions. It should be noted that the method of thinning the thickness of the end of the contact finger 200 and the end of the main blade 100 is not limited to wire cutting. They can also be formed by integral casting or other cutting methods.

[0060] like Figure 3 and Figure 4 As shown, the two surfaces of the blade body 101 along the thickness direction are the first blade surface 1011 and the second blade surface 1012, respectively. One side surface of the blade mounting portion is located in the same plane as the first blade surface 1011, so that an insert notch is formed between the blade mounting portion and the second blade surface 1012. That is, in this embodiment, the blade mounting portion is formed by thinning one side of the second blade surface 1012 of the main blade 100 through wire cutting. Correspondingly, the thickness of one side surface of the contact finger 200 is thinned by wire cutting to form a contact finger mounting portion. The contact finger mounting portion is inserted into the insert notch and fits against the blade mounting portion, and is fixedly connected.

[0061] It should be noted that the thickness of the portion between the first blade surface 1011 and the second blade surface 1012 of the main blade 100 can also be reduced by wire cutting to form an insert notch between the first blade surface 1011 and the second blade surface 1012. Correspondingly, the thickness of the two sides of the contact finger 200 can be reduced by wire cutting so that the contact finger mounting portion is formed in the middle of the thickness direction of the contact finger 200, inserted into the insert notch, and fixed by fasteners.

[0062] To further improve the elasticity of the contact fingers 200 and ensure the contact pressure between each contact finger 200 and the stationary contact, in a specific embodiment of the present invention, one end of the main blade 100 is formed with a contact finger seat corresponding to each contact finger 200. Adjacent contact finger seats are separated by a cutting slit 104, and the contact fingers 200 are detachably mounted on the contact finger seats. In this embodiment, contact finger seats are provided on the main blade 100, and cutting slits 104 are provided between the contact finger seats, giving the contact finger seats a certain degree of elasticity. When the contact fingers 200 are fixed to the contact finger seats, compared to fixing them to the main blade 100 without cutting slits 104, they have better elastic deformation capabilities, thus better ensuring the contact pressure between each contact finger 200 and the stationary contact.

[0063] like Figure 2 As shown, in this embodiment, the finger base may include a first finger base 102 and a second finger base 103. There are multiple first finger bases 102 and multiple second finger bases 103, which are staggered. The length of the first finger base 102 is greater than the length of the second finger base 103. Specifically, three first finger bases 102 may be provided, with a second finger base 103 positioned between every two first finger bases 102. Of course, other arrangements can also be used; this application does not limit the arrangement or number of the first finger bases 102 and the second finger bases 103. The first finger bases 102 and the second finger bases 103 have different lengths. Specifically, the first finger bases 102 can be distinguished by cutting the length of the end portion of the second finger base 103, so that the ends of the first finger bases 102 and the second finger bases 103 form an alternating staggered structure.

[0064] Because the first finger seat 102 and the second finger seat 103 have different lengths, in order to ensure that the end faces of the fingers 200 furthest from the main blade 100 are in the same plane, the lengths of each finger 200 need to be designed to be different. Specifically, for example... Figure 5 As shown, the contact finger 200 includes a first contact finger 201 and a second contact finger 202, and there are multiple first contact fingers 201 and second contact fingers 202. The length of the second contact finger 202 is greater than the length of the first contact finger 201. The first contact finger 201 is detachably fixed to the first contact finger base 102, and the second contact finger 202 is detachably fixed to the second contact finger base 103. The length difference between the first contact finger 201 and the second contact finger 202 is equal to the length difference between the first contact finger base 102 and the second contact finger base 103.

[0065] In this embodiment, a first contact finger seat 102 and a second contact finger seat 103 of different lengths are provided, and a first contact finger 201 and a second contact finger 202 of different lengths are also provided, so as to form a serrated overlapping surface. This fixed overlapping method avoids the phenomenon of a complete breakage and ensures the strength of the isolating switch after assembly.

[0066] like Figures 2-4As shown, the main blade 100 includes a blade body 101 and a finger seat. The finger seat includes a finger seat body and a blade mounting portion located at one end of the finger seat body for mounting the finger 200. The thickness of the blade mounting portion is less than the thickness of the finger seat body, and the thickness of the finger seat body is the same as the thickness of the blade body 101.

[0067] like Figure 3 As shown, the first finger seat 102 includes a first finger seat body and a first blade mounting portion 1021 located at one end of the first finger seat body for mounting the first finger 201. The thickness of the first blade mounting portion 1021 is less than the thickness of the first finger seat body, and the thickness of the first finger seat body is the same as the thickness of the blade body 101.

[0068] like Figure 4 As shown, the second finger seat 103 includes a second finger seat body and a second blade mounting portion 1031 located at one end of the second finger seat body for mounting the second finger 202. The thickness of the second blade mounting portion 1031 is less than the thickness of the second finger seat body, and the thickness of the second finger seat body is the same as the thickness of the blade body 101.

[0069] like Figures 5-7 As shown, the contact finger 200 includes a contact finger body and a contact finger mounting part located at one end of the contact finger body for fitting and connecting with the blade mounting part. The thickness of the contact finger mounting part is less than the thickness of the contact finger body. The thickness of the contact finger body is the same as the thickness of the contact finger seat body. The sum of the thicknesses of the blade mounting part and the contact finger mounting part is the same as the thickness of the contact finger seat body.

[0070] like Figure 6 As shown, the first contact finger 201 includes a first contact finger body 2014 and a first contact finger mounting portion 2011 located at one end of the first contact finger body for fitting and connecting with the first blade mounting portion 1021. The thickness of the first contact finger mounting portion 2011 is less than the thickness of the first contact finger body 2014. The thickness of the first contact finger body 2014 is the same as the thickness of the first contact finger seat body. The sum of the thicknesses of the first blade mounting portion 1021 and the first contact finger mounting portion 2011 is the same as the thickness of the first contact finger seat body.

[0071] like Figure 7 As shown, the second contact finger 202 includes a second contact finger body 2024 and a second contact finger mounting portion 2021 located at one end of the second contact finger body 2024 for fitting and connecting with the second blade mounting portion 1031. The thickness of the second contact finger mounting portion 2021 is less than the thickness of the second contact finger body 2024. The thickness of the second contact finger body 2024 is the same as the thickness of the second contact finger seat body. The sum of the thicknesses of the second blade mounting portion 1031 and the second contact finger body 2024 is the same as the thickness of the second contact finger seat body.

[0072] In this embodiment, the thickness of the ends of the first finger seat 102 and the second finger seat 103 is reduced by wire cutting to form the first blade mounting portion 1021 and the second blade mounting portion 1031. Correspondingly, the thickness of the ends of the first finger 201 and the second finger 202 is reduced by wire cutting to form the first finger mounting portion 2011 and the second finger mounting portion 2021.

[0073] In order to ensure that the sum of the thicknesses of the blade mounting portions (first blade mounting portion 1021 and second blade mounting portion 1031) and their corresponding finger mounting portions (first finger mounting portion 2011 and second finger mounting portion 2021) is the same as the thickness of the finger seat body, the thickness of the thinned ends of the first finger seat 102 and the second finger seat 103 should be equal to the thickness of the corresponding first finger mounting portion 2011 and the second finger mounting portion 2021.

[0074] Correspondingly, the thickness of the ends of the first finger 201 and the second finger 202 is reduced to be equal to the thickness of the corresponding first blade mounting portion 1021 and the second blade mounting portion 1031. This makes the thickness at the overlap point after the first blade mounting portion 1021 and the first finger mounting portion 2011, as well as the second blade mounting portion 1031 and the second finger mounting portion 2021 are attached together the same as the thickness of the finger seat body (first finger seat body and second finger seat body) and the finger body (first finger body 2014 and second finger body 2024).

[0075] This configuration ensures that the shape and thickness of the contact finger 200, after being installed on the contact finger base, are identical to those of existing one-piece isolation blades. This embodiment of the invention, without altering the working principle or overall design dimensions of the isolation blade, involves cutting and reassembling a conventional one-piece isolation blade. It should be noted that the methods for thinning the thickness of the contact finger 200 end and the contact finger base end are not limited to wire cutting; they can also be achieved through one-piece casting or other cutting methods.

[0076] Furthermore, the two surfaces of the blade body 101 along the thickness direction are respectively the first blade surface 1011 and the second blade surface 1012, and the two surfaces of the finger seat body along the thickness direction are respectively located in the same plane as the first blade surface 1011 and the second blade surface 1012. One side surface of the blade mounting portion is located in the same plane as the first blade surface 1011, so that an insert notch is formed between the blade mounting portion and the second blade surface 1012. The finger mounting portion is inserted into the insert notch and fits against the blade mounting portion, and is fixedly connected.

[0077] like Figure 3 and Figure 6As shown, one side surface of the first blade mounting portion 1021 is located in the same plane as the first blade surface 1011, such that a first fitting notch 1022 is formed between the first blade mounting portion 1021 and the second blade surface 1012. A corresponding first finger body 2014 forms the first finger notch 2012 at the first finger mounting portion 2011. The first finger mounting portion 2011 is inserted into the first fitting notch 1022, and the first blade mounting portion 1021 is inserted into the first finger notch 2012, fitting snugly against the first blade mounting portion 1021 and being fixedly connected.

[0078] like Figure 4 and Figure 7 As shown, one side surface of the second blade mounting portion 1031 is located in the same plane as the first blade surface 1011, such that a second fitting notch 1032 is formed between the second blade mounting portion 1031 and the second blade surface 1012. Correspondingly, the second finger body 2024 forms a second finger notch 2022 at the second finger mounting portion 2021. The second finger mounting portion 2021 is inserted into the second fitting notch 1032, and the second blade mounting portion 1031 is inserted into the second finger notch 2022, fitting against and being fixedly connected to the second blade mounting portion 1031.

[0079] In a specific embodiment of the present invention, the contact finger seat and the contact finger 200 are fixed by screws. The contact finger seat has a mounting screw hole that mates with the screw thread, and the contact finger 200 has a fixing hole for the screw to pass through. Specifically, as shown... Figure 3 As shown, the first blade mounting part 1021 has a first mounting screw hole 1023, such as Figure 4 As shown, a second mounting screw hole 1033 is provided on the second blade mounting part 1031; as Figure 6 As shown, the first finger mounting part 2011 has a first fixing hole 2013, such as Figure 7 As shown, a second fixing hole 2023 is provided on the second finger mounting part 2021.

[0080] Those skilled in the art will understand that the isolating blades of the isolating switch are two parallel blades that clamp the stationary contact to achieve electrical connection. In order to enhance the fit between the contact finger 200 and the contact finger seat, so that the contact finger 200 has both flexibility and sufficient strength, in this embodiment, a fixing strip 300 is provided on the facing side of each of the two main blades 100. The fixing strip 300 is located at the position of the contact finger seat and is fixed to the contact finger seat by fasteners. A pull rod connecting the two main blades 100 is provided at the fixing strip 300. A support sleeve is sleeved on the pull rod. The two ends of the support sleeve abut against the fixing strip 300 to counteract the mutual attraction of the electrodynamic force generated when the two main blades 100 are flowing.

[0081] like Figure 8 and Figure 9 As shown, both sides of the magnetic locking plate 401 are bent towards the direction of the first surface of the magnetic locking plate 401 to form reinforcing folded plates 4011, thereby increasing the yield strength of the magnetic locking plate 401. The clamping force adjusting column 402 protrudes from the second surface of the magnetic locking plate 401, and the first and second surfaces of the magnetic locking plate 401 are two opposing surfaces. The clamping force adjusting column 402 is a threaded component, and a threaded hole 4012 can be correspondingly opened on the magnetic locking plate 401 to thread-fit the clamping force adjusting column 402. Alternatively, an internally threaded component with a threaded hole can be provided on the magnetic locking plate 401 to thread-fit the clamping force adjusting column 402. In this embodiment, the length of the clamping force adjusting column 402 protruding from the magnetic locking plate 401 is adjusted by rotating the clamping force adjusting column 402 clockwise and counterclockwise, thereby adjusting the clamping force.

[0082] This invention also discloses a disconnecting switch having the above-mentioned disconnecting knife. Since it has the above-mentioned disconnecting knife, it has all the technical effects of the above-mentioned disconnecting knife, which will not be repeated here.

[0083] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0084] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0085] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0086] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An isolating switch, characterized in that, include: The isolation blade has a movable contact head for electrical connection with a stationary contact head, the movable contact head including a plurality of contact fingers (200) with a gap between adjacent contact fingers (200); A magnetic locking plate (400) is used to press the isolation blade. The magnetic locking plate (400) includes a magnetic locking plate body (401) and a pressing force adjusting column (402) disposed on the magnetic locking plate body (401). The length of the pressing force adjusting column (402) protruding out of the magnetic locking plate body (401) is adjustable. The pressing force adjusting column (402) is pressed and engaged with each of the contact fingers (200) in a one-to-one correspondence. The isolation blade includes a main blade (100) and a detachable finger (200) disposed at one end of the main blade (100). One end of the main blade (100) is formed with a finger seat corresponding to the finger (200) one by one. Two adjacent finger seats are separated by a cutting slit (104). The finger (200) is detachably mounted on the finger seat. The finger seat includes a first finger seat (102) and a second finger seat (103). There are multiple first finger seats (102) and second finger seats (103) and they are staggered. The length of the first finger seat (102) is greater than the length of the second finger seat (103). The finger (200) includes a first finger (201) and a second finger (202). There are multiple first fingers (201) and second fingers (202). The length of the second finger (202) is greater than the length of the first finger (201). The first finger (201) is detachably fixed to the first finger seat (102), and the second finger (202) is detachably fixed to the second finger seat (103).

2. The isolating switch according to claim 1, characterized in that, The main blade (100) includes a blade body (101) and a blade mounting portion located at one end of the blade body (101) for mounting the finger (200), wherein the thickness of the blade mounting portion is less than the thickness of the blade body (101); The finger (200) includes a finger body and a finger mounting portion located at one end of the finger body for fitting and connecting with the blade mounting portion. The thickness of the finger mounting portion is less than the thickness of the finger body. The thickness of the finger body is the same as the thickness of the blade body (101). The sum of the thicknesses of the blade mounting portion and the finger mounting portion is the same as the thickness of the blade body (101).

3. The isolating switch according to claim 2, characterized in that, The blade body (101) has two surfaces along the thickness direction, namely the first blade surface (1011) and the second blade surface (1012). One side surface of the blade mounting part is located in the same plane as the first blade surface (1011), so that an insert notch is formed between the blade mounting part and the second blade surface (1012). The finger mounting portion is inserted into the mounting notch and fits against the blade mounting portion, and is fixedly connected.

4. The isolating switch according to claim 1, characterized in that, The end faces of the first finger (201) and the second finger (202) at the ends away from the main blade (100) are located in the same plane.

5. The isolating switch according to claim 1, characterized in that, The main blade (100) includes a blade body (101) and a finger seat. The finger seat includes a finger seat body and a blade mounting portion located at one end of the finger seat body for mounting the finger (200). The thickness of the blade mounting portion is less than the thickness of the finger seat body, and the thickness of the finger seat body is the same as the thickness of the blade body (101). The finger (200) includes a finger body and a finger mounting portion located at one end of the finger body for fitting and connecting with the blade mounting portion. The thickness of the finger mounting portion is less than the thickness of the finger body. The thickness of the finger body is the same as the thickness of the finger seat body. The sum of the thicknesses of the blade mounting portion and the finger mounting portion is the same as the thickness of the finger seat body.

6. The isolating switch according to claim 5, characterized in that, The blade body (101) has two surfaces along the thickness direction, namely the first blade surface (1011) and the second blade surface (1012), and the two surfaces along the thickness direction of the finger seat body are respectively located in the same plane as the first blade surface (1011) and the second blade surface (1012); One side surface of the blade mounting portion is located in the same plane as the first blade surface (1011), so that an insert notch is formed between the blade mounting portion and the second blade surface (1012); The finger mounting portion is inserted into the mounting notch and fits against the blade mounting portion, and is fixedly connected.

7. The isolating switch according to claim 1, characterized in that, The contact finger seat and the contact finger (200) are fixed by screws. The contact finger seat has a mounting screw hole that is threaded to the screw, and the contact finger (200) has a fixing hole through which the screw passes.

8. The isolating switch according to claim 1, characterized in that, The isolation blade consists of two parallel blades. Each of the two main blades (100) has a fixing strip (300) on one side facing each other. The fixing strip (300) is located at the position of the finger seat and is fixed to the finger seat by fasteners. A pull rod connecting the two main blades (100) is provided at the fixing strip (300). A support sleeve is fitted on the pull rod, and the two ends of the support sleeve abut against the fixing strip (300).

9. The isolating switch according to any one of claims 1-8, characterized in that, Both sides of the magnetic lock plate (401) are bent toward the side where the first surface of the magnetic lock plate (401) is located to form a reinforcing fold plate (4011). The clamping force adjusting column (402) protrudes from the second surface of the magnetic lock plate (401). The first surface and the second surface of the magnetic lock plate (401) are two opposing surfaces.

10. The isolating switch according to any one of claims 1-8, characterized in that, The clamping force adjusting column (402) is a threaded component.

11. A disconnecting switch, comprising a disconnecting knife, characterized in that, The isolating switch is the isolating switch as described in any one of claims 1-10.

Images