Horizontal opening type disconnecting switch main knife contact

Abstract

The invention relates to a main knife contact of a horizontal opening type disconnecting switch, which comprises a male contact and a female contact finger which are matched with each other, the male contact and the female contact finger are respectively arranged on conducting bars, the conducting bar for installing the male contact is defined as a first conducting bar, and the conducting bar for installing the female contact finger is defined as a second conducting bar; the number of the male contacts is four, the four male contacts are distributed on the first conducting bar in a rectangular shape, each male contact is a rectangular plate, the two side faces of each male contact in the breadth direction are arc-shaped faces, and the arc-shaped opening direction of each arc-shaped face faces the center of the corresponding male contact; the number of the female contact fingers is four, the female contact fingers are distributed on the second conducting bar in a rectangular shape and are in one-to-one correspondence with the male contacts, the female contact fingers are cylindrical, contact grooves matched with the male contacts are further formed in the middle positions of the circumferential outer walls of the female contact fingers, and the contact grooves extend in the circumferential direction of the female contact fingers. The main knife contact is a surface contact contact, compared with a traditional contact, the electrical performance is more reliable, the copper consumption is saved by 85%, the silver plating and tin plating amounts are saved by 86%, the cost is low, and the reliability is high.

Description

Technical Field

[0001] The invention relates to the field of isolating switches, and in particular to a main blade contact of a horizontally opening isolating switch. Background Art

[0002] The traditional contacts of GW4, GW5, GW7-12~550kV horizontal disconnecting switches are point contact or line contact solutions. In order to ensure the electrical performance of current flow, short-time withstand and peak withstand, the only way is to increase the size of the contacts and the number of contact fingers. Since the contact fingers need to use copper silver-plated or tin-plated materials, and the traditional contacts and contact fingers are bulky, the cost is very high.

[0003] The contact finger structure of the traditional isolating switch is as follows: Figure 1 , Figure 2 As shown, the mass of the male contact is 1750g and the surface area is 7.43dm 2 The mass of a single female antenna is 713 g and the surface area is 4.96 dm 2 The copper content of the traditional contact finger structure is 1750+713*2=3176g, the silver-tinned area is 7.43+4.96*2=17.35dm², the female contact finger structure is complex and the cost is high. Therefore, it is necessary to design an economical and highly reliable contact solution for GW4, GW5, GW7-12~550kV horizontal breaking disconnectors to reduce costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a main contact of a horizontally opening isolating switch with low cost and high reliability.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a main contact of a horizontal opening isolating switch, the innovation of which is: comprising a male contact and a female contact finger that cooperate with each other, the male contact and the female contact finger are respectively installed on a conductive bar, the conductive bar on which the male contact is installed is defined as a first conductive bar, and the conductive bar on which the female contact finger is installed is defined as a second conductive bar; There are four male contacts, which are distributed in a rectangular shape on the first conductive row. The male contact is a rectangular plate, and both side surfaces of the male contact in the width direction are arc-shaped surfaces, and the arc opening direction of the arc-shaped surface faces the center of the male contact; There are four female contact fingers, which are distributed in a rectangular shape on the second conductive row and correspond one to one with each male contact. The female contact fingers are cylindrical, and a contact groove matching the male contact is opened in the middle position of the circumferential outer wall of the female contact finger. The contact groove extends along the circumferential direction of the female contact finger.

[0006] Furthermore, the contact groove is composed of an inner groove and an outer groove distributed inside and outside, the cross-section of the inner groove is arc-shaped, and the arc-shaped opening of the inner groove faces the outside of the female contact finger, the outer groove surrounds the inner groove, and the outer groove is in a mouth shape when flattened, the four sides of the outer groove are all inclined slopes, and the inclination direction of the slope is from the center of the outer groove to the side of the outer groove gradually inclining toward the direction away from the end face of the inner groove.

[0007] Further, the connection between the male contact and the first conductive bar is as follows: the first conductive bar is composed of a pair of two conductive plates arranged in parallel, and a gap is left between the two conductive plates, the conductive plates are U-shaped plates, and every two male contacts form a group and are installed on the same conductive plate, and the two male contacts installed on the same conductive plate are distributed on the conductive plate in upper and lower positions, and the two conductive plates are connected by a fixing piece at one side away from the male contact, and are connected by a pair of elastic connecting pieces at the other side close to the male contact; The connection between the female contact finger and the second conductive row is as follows: a pair of support plates distributed up and down are installed at the end of the second conductive row, and each two female contact fingers form a group and are installed on a support tube, and the upper and lower sides of the two female contact fingers installed on the same support tube are respectively against the two support plates, and the support tube is fixed to the support plate by the cooperation of bolts and nuts, and through holes for the bolts to pass through up and down are also opened on the female contact fingers and the support tube.

[0008] Furthermore, the elastic connecting member includes a connecting rod, a spring, a fixed plate and a movable plate. Through holes for accommodating the connecting rod to pass through are opened on the two conductive plates. After the connecting rod passes through the through holes on the conductive plates, the ends of the connecting rod are sequentially mounted with the fixed plate, the spring and the movable plate, and the fixed plate is fixedly connected to the connecting rod. One side of the spring abuts against the fixed plate, the other side abuts against the movable plate, and the other side of the movable plate abuts against the outer wall of the conductive plate.

[0009] Furthermore, the support plate includes a conductive bar connecting section and a female contact finger connecting section, wherein the conductive bar connecting section is a rectangular plate, the outer contour line of the female contact finger connecting section is D-shaped, and the conductive bar connecting section and the female contact finger connecting section are staggered in the horizontal direction and connected by a transition connecting section, so that the support plate as a whole forms a Z-shaped structure, the conductive bar connecting section is fixed to the second conductive bar by the cooperation of bolts and nuts, and the female contact finger connecting section is fixed to the female contact finger and the support tube by the cooperation of bolts and nuts.

[0010] Furthermore, one end portion of the male contact in the width direction extends out of the conductive plate.

[0011] Furthermore, the surface of the male contact and the female contact finger contacting each other has a silver-plated layer, and the surfaces of the other surfaces have a tin-plated layer.

[0012] The advantages of the present invention are: the main tool contact of the present invention improves the structure of the male contact and the female contact finger, and adopts a surface contact method to achieve the coordination between the male contact and the female contact finger. Compared with the traditional contact, the electrical performance is more reliable, the copper amount is saved by 85%, and the silver plating and tin plating amount is saved by 86%; the structure is novel, the appearance is simple, the processability is strong, the cost is low, and the reliability is high.

[0013] The two female contact fingers are fixed by adding a support tube, which can support the female contact fingers and also play a role of electrical shunting to balance the flow state of each female contact finger.

[0014] For the design of the support plate, the conductive bar connection section is matched with the female contact finger connection section, which can play a structural support role in the fixation of the female contact finger, and can also realize the functions of electrical current flow, rain and ice protection, and balanced electric field. It is multifunctional and the structure of the support plate is simple.

[0015] By processing the surface of the male contact and the female contact finger, only the contact surface of the two is silver-plated, while the other surfaces are tin-plated. On the basis of ensuring the overall electrical performance, the amount of silver plating can be reduced and the cost can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a traditional contact structure.

[0017] Figure 2 It is a traditional finger-touch structure.

[0018] Figure 3 It is a schematic diagram of the main contact of the horizontal opening isolating switch of the present invention.

[0019] Figure 4 It is a schematic diagram of the main knife contact closing state in the present invention.

[0020] Figure 5 It is a schematic diagram of the male contact in the present invention.

[0021] Figure 6 Schematic diagram of the female antennae in the present invention.

[0022] Figure 7 It is a schematic diagram of the support plate in the present invention.

[0023] Figure 8 It is a schematic diagram of the support tube in the present invention.

[0024] Fig. 9 It is a schematic diagram of the elastic connecting member in the present invention. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0026] like Figure 3-Figure 9 The main contact of a horizontally opening isolating switch shown in the figure comprises a male contact 1 and a female contact finger 2 which cooperate with each other. The male contact 1 and the female contact finger 2 are respectively installed on a conductive bar. The conductive bar on which the male contact 1 is installed is defined as the first conductive bar, and the conductive bar on which the female contact finger 2 is installed is defined as the second conductive bar.

[0027] There are four male contacts 1, which are distributed in a rectangular shape on the first conductive row. Figure 5 As shown in the schematic diagram, the male contact 1 is a rectangular plate, and the two side surfaces of the male contact 1 in the width direction are arc-shaped surfaces, and the arc-shaped opening direction of the arc-shaped surface of the male contact 1 is toward the center of the male contact 1.

[0028] The connection between the male contact 1 and the first conductive bar is as follows: the first conductive bar is composed of a pair of two conductive plates 11 distributed in parallel, and a gap is left between the two conductive plates 11. The conductive plate 11 is a U-shaped plate, and the openings of the two conductive plates 11 are arranged oppositely. Every two male contacts 1 form a group and are installed on the same conductive plate 11. The two male contacts 1 installed on the same conductive plate 11 are distributed on the conductive plate 11 in upper and lower positions. The male contact 1 and the conductive plate 11 are fixed by the cooperation of bolts and nuts. The two conductive plates 11 are connected on the side away from the male contact 1 by a fixing member, which can be a fixing plate or a combination of a fixing bolt and a fixing nut. The two conductive plates 11 are connected on the side close to the male contact 1 by a pair of elastic connectors. Through the cooperation of the fixing member and the elastic connector, one side of the two conductive plates 11 is fixed, and the other side can have a certain elastic adjustment, so as to better realize the subsequent opening and closing coordination of the male contact 1 and the female contact finger 2, and avoid the phenomenon of being unable to open and close due to position deviation.

[0029] One end of the male contact 1 in the width direction extends out of the conductive plate 11 . This design enables the male contact 1 to be well contacted and matched with the female contact finger 2 when the switch is closed, avoiding the incomplete closing between the two due to the conductive plate 11 .

[0030] like Fig. 9As shown in the schematic diagram, the elastic connecting member includes a connecting rod 12, a spring 13, a fixed plate 14 and a movable plate 15. Through holes for accommodating the connecting rod 12 to pass through are opened on the two conductive plates 11. After the connecting rod 12 passes through the through holes on the conductive plate 11, the two sides of the connecting rod 12 extend out of the conductive plate 11 respectively. The end of one side of the connecting rod 12 extending out of the conductive plate 11 is successively covered with a fixed plate 14, a spring 13 and a movable plate 15, and the fixed plate 14 is fixedly connected to the connecting rod 12. One side of the spring 13 abuts on the fixed plate 14, and the other side of the spring 13 abuts on the movable plate 15. The other side of the movable plate 15 abuts on the outer wall of the conductive plate 11. The movable plate 15 is directly attached to the outer wall of the connecting rod 12 and is not fixed to the movable plate 15. Through the telescopic characteristics of the spring 13, the two conductive plates 11 on this side have a certain degree of elasticity, so that the male contact 1 can better cooperate with the female contact finger 2 to achieve closing.

[0031] There are four female contact fingers 2, which are distributed in a rectangular shape on the second conductive row 21, and each female contact finger 2 is matched with each male contact 1 one by one. Figure 6 As shown in the schematic diagram, the female contact finger 2 is cylindrical, and a contact groove matching with the male contact is formed in the middle of the circumferential outer wall of the female contact finger 2 , and the contact groove extends along the circumferential direction of the female contact finger 2 .

[0032] The contact groove is composed of an inner groove 22 and an outer groove 23 distributed inside and outside. The cross section of the inner groove 22 is in an arc shape, and the arc opening of the inner groove 22 faces the outside of the female contact finger 2. The outer groove 23 surrounds the inner groove 22, and the outer groove 23 is in a square shape when laid flat. The four sides of the outer groove 23 are all inclined slopes, and the inclination direction of the slope is from the center of the outer groove 23 to the side direction of the outer groove 23 gradually inclines away from the end face of the inner groove 22. The contact groove adopts a combination of the inner groove 22 and the outer groove 23, and the inner groove 22 realizes the closing cooperation with the male contact 1, while the outer groove 23 can play a certain guiding role, and play a role in guiding the moving path of the male contact 1 in advance.

[0033] The connection between the female contact finger 2 and the second conductive bar 21 is as follows: a pair of support plates distributed up and down are installed at the end of the second conductive bar 21, and each two female contact fingers 2 form a group and are installed on a support tube 24, and the upper and lower sides of the two female contact fingers 2 installed on the same support tube 24 are respectively against the two support plates, and the support tube 24 is a cylindrical structure, and the upper and lower sides of the support tube 24 are fixed to the support plate by the cooperation of bolts and nuts. Through holes for bolts to pass through the upper and lower parts are also opened on the female contact finger 2 and the support tube 24. After a full-length bolt passes through the support plate located at the lower side, the female contact finger 2 located at the lower side, the support tube 24, the female contact finger 2 located at the upper side, and the support plate located at the upper side in sequence, it is tightened by the nut, thereby realizing the fixation between the support tube 24, the female contact finger 2 and the support plate. The fixation of the two female contact fingers 2 is realized by adding the cooperation of the support tube 24, which can play a supporting role for the female contact fingers 2, and at the same time can also play a role of electrical shunting, balancing the flow state of each female contact finger 2.

[0034] The support plate includes a conductive bar connection section 25 and a female contact finger connection section 26, wherein the conductive bar connection section 25 is a rectangular plate, the outer contour line of the female contact finger connection section 26 is in a D shape, and the conductive bar connection section 25 and the female contact finger connection section 26 are staggered in the horizontal direction, and the conductive bar connection section 25 and the female contact finger connection section 26 are connected by a transition connection section 27, so that the support plate as a whole forms a Z-shaped structure, and the support plate located on the upper side and the support plate located on the lower side are symmetrically distributed, that is, in the support plate located on the upper side, the female contact finger connection section 26 is above the conductive bar connection section 25 in the horizontal direction, and in the support plate located on the lower side, the female contact finger connection section 26 is below the conductive bar connection section 25 in the horizontal direction.

[0035] The conductive bar connection section 25 is fixed to the second conductive bar 21 by the cooperation of bolts and nuts, and through holes for the bolts to pass through are provided on the conductive bar connection section 25 and the second conductive bar 21. The female contact finger connection section 26 is fixed to the female contact finger 2 and the support tube 24 by the cooperation of bolts and nuts, and a through hole for the bolts to pass through is provided on the female contact finger connection section 26. For the design of the support plate, the conductive bar connection section 25 is matched with the female contact finger connection section 26, which can play a structural support role in the fixation of the female contact finger 2, and can also achieve the functions of electrical current flow, rain and ice protection, and balanced electric field, etc. It is multifunctional and has a simple structure.

[0036] The male contact 1 and the female contact finger 2 are both made of pure copper profiles, and the surface of the male contact 1 and the female contact finger 2 that are in contact with each other has a silver-plated layer, and the surfaces of the other surfaces have a tin-plated layer. By processing the surfaces of the male contact 1 and the female contact finger 2, only the contact surfaces of the two are silver-plated, and the other surfaces are tin-plated, while the overall electrical performance can be guaranteed, the amount of silver plating can be reduced, and the cost can be saved.

[0037] When the above structure is used for processing, the weight of a single male contact 1 is 70g and the surface area is 0.37dm 2 The weight of a single female tentacle 2 is 50 g and the surface area is 0.25 dm 2 The total weight is 70g*4+50g*4=480g, which saves 85% of copper compared to the traditional structure of 3176g. The total area is 0.37dm 2 *4+0.25dm 2 *4=2.48dm², compared with the traditional structure of 17.35dm², it saves 86% of silver and tin. Therefore, the main tool contact of the present invention adopts a surface contact method to achieve the coordination between the male contact and the female contact finger. Compared with the traditional contact, the electrical performance is more reliable, the structure is novel, the appearance is simple, the processability is strong, the cost is low, and the reliability is high.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A main contact of a horizontally opening isolating switch, characterized in that: It includes a male contact and a female contact finger that cooperate with each other, the male contact and the female contact finger are respectively installed on the conductive bar, and the conductive bar on which the male contact is installed is defined as the first conductive bar, and the conductive bar on which the female contact finger is installed is defined as the second conductive bar; There are four male contacts, which are distributed in a rectangular shape on the first conductive row. The male contact is a rectangular plate, and both side surfaces of the male contact in the width direction are arc-shaped surfaces, and the arc opening direction of the arc-shaped surface faces the center of the male contact; There are four female contact fingers, which are distributed in a rectangular shape on the second conductive row and correspond one to one with each male contact. The female contact fingers are cylindrical, and a contact groove matching the male contact is opened in the middle position of the circumferential outer wall of the female contact finger. The contact groove extends along the circumferential direction of the female contact finger.

2. The main contact of the horizontal opening isolating switch according to claim 1 is characterized in that: The contact groove is composed of an inner groove and an outer groove distributed inside and outside. The cross-section of the inner groove is arc-shaped, and the arc-shaped opening of the inner groove faces the outside of the female contact finger. The outer groove surrounds the inner groove, and the outer groove is in a square shape when flattened. The four sides of the outer groove are all inclined slopes, and the inclination direction of the slope is from the center of the outer groove to the side of the outer groove, gradually inclining towards the direction away from the end face of the inner groove.

3. The main contact of the horizontal opening isolating switch according to claim 1 is characterized in that: The connection between the male contact and the first conductive row is as follows: the first conductive row is composed of a pair of two conductive plates arranged in parallel, and a gap is left between the two conductive plates. The conductive plates are U-shaped plates, and each two male contacts form a group and are installed on the same conductive plate. The two male contacts installed on the same conductive plate are distributed on the conductive plate in an upper and lower position. The two conductive plates are connected by a fixing piece at one side away from the male contact, and are connected by a pair of elastic connecting pieces at the other side close to the male contact. The connection between the female contact finger and the second conductive row is as follows: a pair of support plates distributed up and down are installed at the end of the second conductive row, and each two female contact fingers form a group and are installed on a support tube, and the upper and lower sides of the two female contact fingers installed on the same support tube are respectively against the two support plates, and the support tube is fixed to the support plate by the cooperation of bolts and nuts, and through holes for the bolts to pass through up and down are also opened on the female contact fingers and the support tube.

4. The main contact of the horizontal opening isolating switch according to claim 3 is characterized in that: The elastic connecting piece includes a connecting rod, a spring, a fixed plate and a movable plate. Through holes for the connecting rod to pass through are opened on the two conductive plates. After the connecting rod passes through the through holes on the conductive plates, the ends of the connecting rod are sequentially mounted with the fixed plate, the spring and the movable plate, and the fixed plate is fixedly connected to the connecting rod. One side of the spring abuts against the fixed plate, and the other side abuts against the movable plate, and the other side of the movable plate abuts against the outer wall of the conductive plate.

5. The main contact of the horizontal opening isolating switch according to claim 3 is characterized in that: The support plate includes a conductive bar connection section and a female contact finger connection section, wherein the conductive bar connection section is a rectangular plate, the outer contour line of the female contact finger connection section is in a D shape, and the conductive bar connection section and the female contact finger connection section are staggered in the horizontal direction and connected by a transition connection section, so that the support plate as a whole forms a Z-shaped structure, the conductive bar connection section is fixed to the second conductive bar by the cooperation of bolts and nuts, and the female contact finger connection section is fixed to the female contact finger and the support tube by the cooperation of bolts and nuts.

6. The main contact of the horizontal opening isolating switch according to claim 3 is characterized in that: One end portion of the male contact in the width direction extends out of the conductive plate.

7. The main contact of the horizontal opening isolating switch according to claim 1 is characterized in that: The surface of one side where the male contact and the female contact finger contact each other has a silver-plated layer, and the surfaces of the other sides have a tin-plated layer.

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