A three-phase load isolating switch and its production process

Abstract

The present invention relates to a three-phase load isolating switch and its production process, including an arc extinguishing chamber, wherein the arc extinguishing chamber includes a left arc extinguishing plate and a right arc extinguishing plate that are fixedly connected, an arc extinguishing space is provided between the left arc extinguishing plate and the right arc extinguishing plate, and an inlet is provided at the upper end of the arc extinguishing chamber inclined outward; an arc extinguishing chamber mounting plate, wherein the arc extinguishing chamber mounting plate is electrically connected to the incoming line terminal and fixedly connected to the arc extinguishing chamber; an arc extinguishing contact, wherein the arc extinguishing contact is cylindrically arranged; an arc extinguishing shrapnel, wherein the lower end of the arc extinguishing shrapnel is electrically connected to the arc extinguishing chamber mounting plate through bolts and fixed to the outer wall of the arc extinguishing chamber, wherein a snap-in hole for snap-in installation of the arc extinguishing contact is provided on the arc extinguishing shrapnel, and the arc extinguishing shrapnel is made of conductive elastic metal material. The beneficial effects of the present invention are: effectively introducing the arc generated between the moving contact and the static contact into between the knife switch and the arc extinguishing contact, and when the knife switch passes through the arc extinguishing contact, the arc is effectively extinguished in the arc extinguishing space.

Description

Technical Field

[0001] The invention relates to the technical field of isolating switches, and in particular to a three-phase load isolating switch and a production process thereof. Background Art

[0002] Isolating switch is a kind of switch device mainly used for "isolating power supply, switching operation, connecting and disconnecting low current circuit". When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its working principle and structure are relatively simple, but due to its large usage and high working reliability requirements, it has a great impact on the design, construction and safe operation of substations and power plants.

[0003] Chinese patent CN203456368U discloses a high-voltage disconnector with an arc extinguishing cover, including an insulating cylinder, a moving contact, a static contact, a knife switch, and an arc extinguishing cover. A connecting piece is embedded in each of the two ends of the insulating cylinder to form a U-shaped bracket. An assembly rod extending outward is embedded in the middle of the insulating cylinder. The lower part of the static contact is fixed to the connecting piece at one end of the insulating cylinder, and the lower part of the moving contact is fixed to the connecting piece at the other end of the insulating cylinder. One end of the knife switch is hinged to the upper part of the static contact by a bolt, and the upper part of the moving contact is provided with a groove. The other end of the knife switch is fixed with a first pin shaft that matches the groove of the upper part of the moving contact. A pull ring is installed in the middle of the knife switch; the arc extinguishing cover includes a left cover plate, a right cover plate and a positioning plate, and the upper end of the positioning plate is inserted between the left cover plate and the right cover plate. The inner side surfaces of the lower ends of the left cover plate and the right cover plate are fixed with bolts, and the upper ends of the left cover plate and the right cover plate are tilted outward to form an arc inlet; the arc extinguishing cover is fixed to the connecting piece of the insulating column near the moving contact end through the positioning plate; a second pin shaft is installed in the middle of the knife switch, and the end of the second pin shaft near the arc extinguishing cover extends outward to form an extension section, and a conductive knife is hinged at the end of the extension section. The free end of the conductive knife is inserted into the space between the left cover plate and the right cover plate through the inlet of the arc extinguishing cover when the knife switch is combined with the moving contact.

[0004] In the above patent, the arc is introduced into the left cover plate and the right cover plate through the positioning plate, and the positioning plate is located at the lower end between the left cover plate and the right cover plate. Therefore, when the switch is closed, the knife switch is in contact with the positioning plate. When the switch is opened, the knife switch and the moving contact act at the same time. Therefore, when the moving contact and the static contact are just separated, the knife switch and the positioning plate are also in a state of just separation. The arc generated between the moving contact and the static contact is difficult to quickly and effectively enter between the knife switch and the positioning plate for arc extinguishing, resulting in the arc extinguishing not being fast enough and the arc extinguishing effect being poor. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a three-phase load isolating switch and a production process thereof to solve the above problems.

[0006] The technical solution of the present invention is implemented as follows: a three-phase load isolating switch, comprising:

[0007] An arc extinguishing chamber, the arc extinguishing chamber comprising a left arc extinguishing plate and a right arc extinguishing plate that are fixedly connected, an arc extinguishing space is provided between the left arc extinguishing plate and the right arc extinguishing plate, and an inlet is provided at an upper end of the arc extinguishing chamber that is inclined outward;

[0008] An arc extinguishing chamber mounting plate, the arc extinguishing chamber mounting plate being electrically connected to the incoming line terminal and fixedly connected to the arc extinguishing chamber;

[0009] An arc extinguishing contact, wherein the arc extinguishing contact is cylindrically arranged;

[0010] Arc extinguishing shrapnel, the lower end of which is electrically connected to the arc extinguishing chamber mounting plate through bolts and fixed to the outer wall of the arc extinguishing chamber, the arc extinguishing shrapnel is provided with a clamping hole for clamping and installing the arc extinguishing contact, and the arc extinguishing shrapnel is made of conductive elastic metal material;

[0011] A through hole for an arc extinguishing contact to pass through is provided on one outer wall of the arc extinguishing chamber. The arc extinguishing contact is electrically connected to the arc extinguishing spring and extends into the arc extinguishing space. A gap is provided between the lower side of the arc extinguishing contact and the bottom of the arc extinguishing space.

[0012] By adopting the above technical scheme, the arc extinguishing chamber mounting plate is electrically connected to the arc extinguishing contact through the arc extinguishing spring piece. When in the opening or closing state, the knife switch is above or below the arc extinguishing contact, so that when the opening and closing actions are performed, the moving contact and the static contact are separated, and the knife switch will first move in the direction close to the arc extinguishing contact, thereby effectively introducing the arc generated between the moving contact and the static contact into between the knife switch and the arc extinguishing contact. When the knife switch passes through the arc extinguishing contact, the arc is effectively extinguished in the arc extinguishing space; when opening and closing, the knife switch will push the arc extinguishing contact, push the arc extinguishing contact out of the arc extinguishing space, and at the same time the arc extinguishing spring piece bends outward. When the knife switch is away from the arc extinguishing contact, the arc extinguishing spring piece resets and drives the arc extinguishing contact into the arc extinguishing space.

[0013] The present invention is further configured as follows: the card connection hole comprises:

[0014] Insert the circular hole, the inner diameter of the insertion circular hole matches the outer diameter of the arc extinguishing contact;

[0015] Fixed sliding holes, wherein the spacing between the fixed sliding holes is smaller than the outer diameter of the arc extinguishing contact;

[0016] Among them, the insertion circular hole is connected to the fixed sliding hole, the fixed sliding hole is arranged near the end of the arc extinguishing spring piece, two fixed grooves away from each other are opened on the outer wall of the arc extinguishing contact, the width of the fixed groove is greater than the thickness of the arc extinguishing spring piece, and the spacing of the fixed sliding hole corresponds to the distance between the bottoms of the two fixed grooves.

[0017] By adopting the above technical solution, during installation, the arc extinguishing contact is first inserted into the insertion circular hole, and then the arc extinguishing contact is rotated to align the fixed groove on the arc extinguishing contact with the two sides of the fixed sliding hole, and the arc extinguishing contact is pushed into the fixed sliding hole to complete the fixation, so that the arc extinguishing contact will not rotate on the arc extinguishing spring piece, making the assembly of the arc extinguishing contact and the arc extinguishing spring piece more convenient.

[0018] The present invention is further configured as follows: one end of the arc extinguishing contact extending into the arc extinguishing space is configured as an inclined surface, and the inclined surface is configured toward the upper side.

[0019] By adopting the above technical solution, the knife switch can enter under the arc extinguishing contact more smoothly when performing the closing action.

[0020] A production process of a three-phase load isolating switch comprises the following steps:

[0021] S1: First, fixing grooves are obtained by cutting on both sides of the pipe fitting, and then multiple groups of fixing grooves are cut in sequence along the length direction of the pipe fitting;

[0022] S2: Then the end of the pipe is cut by the inclined blade to obtain the first arc extinguishing contact, and then the end of the pipe is cut by the vertical blade to obtain the second arc extinguishing contact, and the cutting is repeated in this way;

[0023] S3: Deburring and grinding the arc extinguishing contacts;

[0024] S4: Place the treated arc-extinguishing contact in liquid nitrogen for 0.5-2 hours;

[0025] S5: Take out the arc extinguishing contact and install it on the arc extinguishing spring by a contact assembly machine;

[0026] S6: Assemble the arc extinguishing spring with arc extinguishing contact onto the arc extinguishing chamber.

[0027] By adopting the above technical solution, multiple arc extinguishing contacts can be cut out on a pipe by adjusting the cutting angle, thereby reducing material waste. The arc extinguishing contacts with different directions and angles can then be adjusted to the specified angle through a contact assembly machine and then assembled onto the arc extinguishing shrapnel, thereby effectively improving the assembly efficiency of the arc extinguishing contacts and arc extinguishing shrapnel. The arc extinguishing contacts treated with liquid nitrogen can reduce the outer diameter, thereby being smoother when inserted into the arc extinguishing shrapnel, thereby reducing damage during installation.

[0028] The present invention is further configured as follows: the contact assembly machine comprises:

[0029] A shrapnel conveying rack, the shrapnel conveying rack is used to convey arc-extinguishing shrapnel;

[0030] A contact installation mechanism, the contact installation mechanism is used to flip the arc-extinguishing contact so that the end with the inclined surface faces upward and transport it to the clamping hole of the arc-extinguishing spring in the spring transport frame;

[0031] A contact conveying frame, the contact conveying frame is used to convey the arc extinguishing contact to the contact installation mechanism;

[0032] A rotation adjustment mechanism, which is installed on the base through a rotation adjustment frame, and is used to drive the arc-extinguishing contact in the clamping hole to rotate to a specified angle;

[0033] A spring moving mechanism, the spring moving mechanism is used to clamp and pull the arc-extinguishing springs on the spring conveying frame;

[0034] The tail end of the shrapnel conveying rack extends below the rotation adjustment mechanism, and the contact mounting mechanism is located below the tail end of the shrapnel conveying rack.

[0035] By adopting the above technical scheme, the cut arc extinguishing contact is rolled and transported to the contact installation mechanism through the contact conveying frame, and the end of the arc extinguishing contact with the inclined surface is facing upward and inserted into the insertion hole of the arc extinguishing spring piece in the contact installation mechanism, and then the angle of the arc extinguishing contact is rotated by rotating the adjustment mechanism to align the fixed groove on the arc extinguishing contact with the two sides of the fixed sliding hole, and then the arc extinguishing spring piece is pulled by the spring piece moving mechanism to move the arc extinguishing contact from the insertion hole to the fixed sliding hole, and then the assembled arc extinguishing contact and arc extinguishing spring piece are taken out by the spring piece moving mechanism, and arc extinguishing contacts with different directions and angles are effectively assembled on the arc extinguishing spring piece after adjustment, without the need for manual operation, thereby effectively improving the assembly efficiency.

[0036] The present invention is further configured as follows: the rotating adjustment frame comprises:

[0037] A column, wherein the column is vertically arranged on the base, and a plurality of columns are arranged;

[0038] A top plate, the top plate being fixed to the top of the column;

[0039] A first slide plate, wherein the first slide plate is slidably connected to the column;

[0040] The second slide plate is slidably connected to the column and is located below the first slide plate. The second slide plate is fixedly connected to the first slide plate via a connecting column.

[0041] By adopting the above technical solution, the rotation adjustment mechanism can move in the vertical direction through the rotation adjustment frame, making its movement more stable.

[0042] The present invention is further configured as follows: the rotation adjustment mechanism comprises:

[0043] A telescopic cylinder, wherein the telescopic cylinder is fixed to the bottom of the top plate, and an output shaft of the telescopic cylinder is fixedly connected to the first slide plate;

[0044] A double-shaft rotary motor, wherein the double-shaft rotary motor is provided with a rotary shaft, and upper and lower ends of the rotary shaft extend out of the upper and lower ends of the double-shaft rotary motor, and the double-shaft rotary motor is installed on the upper side of the second slide plate;

[0045] A fixing seat, the fixing seat being fixedly mounted on the lower side of the second slide plate;

[0046] A rotating member, wherein a square groove with a square cross section is provided at the upper end of the rotating member, a groove corresponding to the end with the inclined surface of the arc extinguishing contact is provided at the lower end of the rotating member, and the rotating member is rotatably and slidably connected to the lower side of the fixed seat;

[0047] The lower end of the rotating shaft passes through the second slide plate and extends into the fixed seat. The lower end of the rotating shaft is configured as a square shaft matched with the square groove. The square shaft is inserted into the square groove for transmission and sliding connection.

[0048] By adopting the above technical solution, in the initial state, the rotating member rotates to an angle that matches the adjusted arc extinguishing contact, so that the groove is completely fitted with the adjusted arc extinguishing contact; when the contact installation mechanism inserts the arc extinguishing contact into the arc extinguishing spring, the telescopic cylinder extends to drive the first slide plate, the second slide plate, the fixed seat, and the rotating member to move downward, so that the lower end of the rotating member is sleeved on one end of the inclined surface of the arc extinguishing contact, and the top of the inclined surface of the arc extinguishing contact abuts against the inclined surface edge of the groove. Because it is an inclined surface, as the rotating member is continuously pressed downward, the top of the inclined surface of the arc extinguishing contact Sliding will occur between the inclined edge of the groove, causing the rotating part to rotate until the inclined top of the arc extinguishing contact abuts against the inclined top of the groove, thereby achieving complete fit; when the rotating part rotates, it drives the rotating shaft of the double-output shaft rotating motor to rotate synchronously. When the inclined top of the arc extinguishing contact is completely fitted with the inclined top of the groove, the double-output shaft rotating motor is started to drive the rotating shaft, the rotating part and the arc extinguishing contact to rotate synchronously, and the arc extinguishing contact is rotated to a specified angle so that the fixed groove on the arc extinguishing contact is aligned with both sides of the fixed sliding hole.

[0049] The present invention is further configured as follows: the rotation adjustment mechanism further comprises:

[0050] A rotation angle detection device is used to detect the rotation angle and rotation direction of the rotation shaft. The rotation angle detection device is connected to the upper end of the rotation shaft and is installed on the lower side of the first slide plate.

[0051] By adopting the above technical solution, when the telescopic cylinder drives the rotating part to be continuously pressed down, the rotating part rotates under the cooperation with the arc extinguishing contact, thereby driving the rotating shaft to rotate. The rotating shaft is connected to the rotation angle detection device, so as to detect the rotation angle of the rotating part, so that when the top of the inclined surface of the arc extinguishing contact is completely in contact with the top of the inclined surface of the groove, the data obtained by the rotation angle detection device is used to control the rotating motor to reverse the same angle, thereby driving the arc extinguishing contact to rotate to the specified angle, so that the fixed groove on the arc extinguishing contact is aligned with the two sides of the fixed sliding hole.

[0052] The present invention is further configured as follows: the rotation adjustment mechanism further comprises:

[0053] A first sleeve ring, the first sleeve ring is transmission- and slidably connected to the outer wall of the rotating member, the first sleeve ring slides along the axial direction of the rotating member, the upper and lower ends of the first sleeve ring are rotationally connected to the fixed seat, and a transmission block is protruded on the outer wall of the first sleeve ring;

[0054] A second sleeve ring, wherein the second sleeve ring is sleeved on the outside of the first sleeve ring, the upper and lower ends of the second sleeve ring are rotatably connected to the fixing seat, a gap is provided between the second sleeve ring and the first sleeve ring, an annular transmission groove is provided on the inner wall of the second sleeve ring along its axis, and an angle α formed by the two ends of the transmission groove in the second sleeve ring is greater than 180°;

[0055] A first torsion spring, wherein the first torsion spring is sleeved on the outside of the first sleeve and is located in the gap between the second sleeve and the first sleeve, one end of the first torsion spring is fixedly connected to the first sleeve, and the other end of the first torsion spring is fixedly connected to the fixing seat;

[0056] A second torsion spring, wherein the second torsion spring is sleeved on the outside of the second sleeve ring, one end of the second torsion spring is fixedly connected to the second sleeve ring, and the other end of the second torsion spring is fixedly connected to the fixing seat;

[0057] The transmission block extends into the transmission slot, and when no external force is applied, the transmission block abuts against one end of the transmission slot, and the acting forces of the first torsion spring and the second torsion spring are opposite.

[0058] By adopting the above technical scheme, when the telescopic cylinder drives the rotating part to be continuously pressed down, and the rotating part rotates under the cooperation with the arc extinguishing contact, the rotating part will rotate clockwise or counterclockwise relative to the fixed seat; when the rotating part rotates clockwise, it will drive the first ring to rotate, and the transmission block slides in the transmission groove, thereby pulling one end of the first torsion spring to accumulate force, so that when the rotating part rotates under the cooperation with the arc extinguishing contact, it can be closely attached to the arc extinguishing contact, and the cooperation with the arc extinguishing contact is tighter, thereby avoiding slipping; when the rotating part rotates counterclockwise, it will drive the second ring to rotate counterclockwise through the cooperation of the transmission block and the transmission groove, thereby pulling one end of the second torsion spring to accumulate force, and can cooperate with the rotating part to rotate in both directions.

[0059] The present invention is further configured as follows: the rotation adjustment mechanism further comprises:

[0060] A spring is arranged between the upper end of the rotating member and the fixed seat.

[0061] By adopting the above technical solution, when the telescopic cylinder drives the rotating part to be continuously pressed downward and the rotating part contacts the arc extinguishing contact, the spring will be compressed. Under the action of the spring, the rotating part can be pressed tightly against the arc extinguishing contact, thereby maintaining the contact state and making the contact between the rotating part and the arc extinguishing contact more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0063] Figure 1 It is a structural schematic diagram of the three-phase load isolating switch in the present invention;

[0064] Figure 2 It is a structural cross-sectional view of the three-phase load isolating switch in the present invention;

[0065] Figure 3 It is a schematic diagram of the assembly structure of the arc extinguishing contact and the arc extinguishing shrapnel in the present invention;

[0066] Figure 4 It is a schematic diagram of the explosion structure of the arc extinguishing contact and the arc extinguishing shrapnel in the present invention;

[0067] Figure 5 The structure and operation diagram of the contact assembly machine in the present invention is shown in FIG. Figure 1 (initial state);

[0068] Figure 6The structure and operation diagram of the contact assembly machine in the present invention is shown in FIG. Figure 2 (The rotating part just comes into contact with the arc-extinguishing contact);

[0069] Figure 7 for Figure 6 The structural diagram of A in the figure;

[0070] Figure 8 for Figure 7 Structural cross-sectional view in the aa direction;

[0071] Fig. 9 The structure and operation diagram of the contact assembly machine in the present invention is shown in FIG. Figure 3 (The rotating part fits the arc-extinguishing contact completely);

[0072] Fig.10 The structure and operation diagram of the contact assembly machine in the present invention is shown in FIG. Figure 4 (After the rotating part drives the arc extinguishing contact to rotate);

[0073] Fig.11 The structure and operation diagram of the contact assembly machine in the present invention is shown in FIG. Figure 5 (Take out the rotating part after it is separated from the arc-extinguishing contact);

[0074] Fig.12 The structure diagram of the contact installation mechanism in the present invention is shown in FIG. Figure 1 (When the arc-extinguishing contact enters the contact mounting mechanism);

[0075] Fig.13 for Fig.12 Structural cross-sectional view of the state;

[0076] Fig.14 for Fig.12 Top view of the structure in status (removing the side panels);

[0077] Fig.15 for Fig.14 Schematic diagram of the structure of B;

[0078] Fig.16 It is a schematic diagram of the action of the electromagnetic reset mechanism;

[0079] Fig.17 The structure diagram of the contact installation mechanism in the present invention is shown in FIG. Figure 2 (When the rotating box moves to the upper end of the rotating wheel);

[0080] Fig.18 for Fig.17 Schematic diagram of the structure of C;

[0081] Fig.19 for Fig.17 Structural cross-sectional view of the state;

[0082] Fig. 20 The structure diagram of the contact installation mechanism in the present invention is shown in FIG. Figure 3 (When the arc extinguishing contact is pushed out of the rotating box). DETAILED DESCRIPTION

[0083] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0084] like Figure 1-Figure 20 As shown, the present invention discloses a three-phase load isolating switch, comprising:

[0085] The arc extinguishing chamber 580 comprises a left arc extinguishing plate 5800 and a right arc extinguishing plate 5801 which are fixedly connected, an arc extinguishing space 5802 is provided between the left arc extinguishing plate 5800 and the right arc extinguishing plate 5801, and an inlet 5805 is provided at the upper end of the arc extinguishing chamber 580 which is inclined outward;

[0086] The arc extinguishing chamber mounting plate 582 is electrically connected to the incoming line terminal and fixedly connected to the arc extinguishing chamber 580;

[0087] An arc extinguishing contact 583, wherein the arc extinguishing contact 583 is cylindrical;

[0088] Arc extinguishing shrapnel 584, the lower end of which is electrically connected to the arc extinguishing chamber mounting plate 582 through bolts and fixed to the outer wall of the arc extinguishing chamber 580, and the arc extinguishing shrapnel 584 is provided with a snap-in hole 5840 for snap-in installation of the arc extinguishing contact 583, and the arc extinguishing shrapnel 584 is made of conductive elastic metal material;

[0089] Among them, a through hole 5803 for the arc extinguishing contact 583 to pass through is opened on the outer wall of one side of the arc extinguishing chamber 580. The arc extinguishing contact 583 is electrically connected to the arc extinguishing spring 584 and extends into the arc extinguishing space 5802. There is a gap between the lower side of the arc extinguishing contact 583 and the bottom of the arc extinguishing space 5802.

[0090] By adopting the above technical scheme, the arc extinguishing chamber mounting plate 582 is electrically connected to the arc extinguishing contact 583 through the arc extinguishing spring piece 584. When in the opening or closing state, the knife switch is above or below the arc extinguishing contact 583, so that when the opening and closing actions are performed, the moving contact and the static contact are separated, and the knife switch will first move in the direction close to the arc extinguishing contact 583, thereby effectively introducing the arc generated between the moving contact and the static contact into between the knife switch and the arc extinguishing contact 583. When the knife switch passes through the arc extinguishing contact 583, the arc is effectively extinguished in the arc extinguishing space 5802; when opening and closing, the knife switch will push the arc extinguishing contact, push the arc extinguishing contact 583 out of the arc extinguishing space 5802, and at the same time the arc extinguishing spring piece 584 bends outward. When the knife switch is away from the arc extinguishing contact 583, the arc extinguishing spring piece 584 resets and drives the arc extinguishing contact 583 into the arc extinguishing space 5802.

[0091] In the embodiment of the present invention, the clamping hole 5840 includes:

[0092] Insert the circular hole 5841, wherein the inner diameter of the insertion circular hole 5841 matches the outer diameter of the arc extinguishing contact 583;

[0093] Fixed sliding holes 5842, wherein the spacing between the fixed sliding holes 5842 is smaller than the outer diameter of the arc extinguishing contact 583;

[0094] Among them, the insertion circular hole 5841 is connected to the fixed sliding hole 5842, and the fixed sliding hole 5842 is arranged close to the end of the arc extinguishing spring 584. Two fixed grooves 5830 away from each other are opened on the outer wall of the arc extinguishing contact 583. The width of the fixed groove 5830 is greater than the thickness of the arc extinguishing spring 584, and the spacing of the fixed sliding hole 5842 corresponds to the distance between the bottoms of the two fixed grooves 5830.

[0095] By adopting the above technical solution, during installation, the arc extinguishing contact 583 is first inserted into the insertion hole 5841, and then the arc extinguishing contact 583 is rotated to align the fixed groove 5830 on the arc extinguishing contact 583 with the two sides of the fixed sliding hole 5842, and the arc extinguishing contact 583 is pushed to slide into the fixed sliding hole 5842 to complete the fixation, so that the arc extinguishing contact 583 will not rotate on the arc extinguishing spring piece 584, making the assembly of the arc extinguishing contact 583 and the arc extinguishing spring piece 584 more convenient.

[0096] In the embodiment of the present invention, one end of the arc extinguishing contact 583 extending into the arc extinguishing space 5802 is configured as an inclined surface, and the inclined surface is arranged toward the upper side.

[0097] By adopting the above technical solution, the knife switch can enter under the arc extinguishing contact 583 more smoothly when performing the closing action.

[0098] A production process of a three-phase load isolating switch comprises the following steps:

[0099] S1: First, fixing grooves 5830 are obtained by cutting on both sides of the pipe fitting, and then multiple groups of fixing grooves 5830 are cut in sequence along the length direction of the pipe fitting;

[0100] S2: Then, the end of the pipe is cut by an inclined blade to obtain a first arc-extinguishing contact 583, and then the end of the pipe is cut by a vertical blade to obtain a second arc-extinguishing contact 583, and the cutting is repeated in this way;

[0101] S3: Deburring and grinding the arc extinguishing contact 583;

[0102] S4: placing the treated arc-extinguishing contact 583 in liquid nitrogen for 0.5-2 hours;

[0103] S5: Take out the arc extinguishing contact 583 and install the arc extinguishing contact 583 on the arc extinguishing spring 584 by a contact assembly machine;

[0104] S6: Assemble the arc extinguishing spring 584 with the arc extinguishing contact 583 onto the arc extinguishing chamber 580 .

[0105] By adopting the above technical solution, multiple arc extinguishing contacts 583 can be cut out on a pipe by adjusting the cutting angle, thereby reducing material waste. The arc extinguishing contacts 583 with different directions and angles can then be adjusted to the specified angle through a contact assembly machine, and then assembled to the arc extinguishing shrapnel 584, thereby effectively improving the assembly efficiency of the arc extinguishing contacts 583 and the arc extinguishing shrapnel 584. The arc extinguishing contacts 583 treated with liquid nitrogen can reduce the outer diameter, thereby being smoother when inserted into the arc extinguishing shrapnel 584, reducing damage caused during installation.

[0106] In an embodiment of the present invention, the contact assembly machine comprises:

[0107] Shrapnel conveying rack 1, the shrapnel conveying rack 1 is used to convey arc extinguishing shrapnel 584;

[0108] The contact installation mechanism 2 is used to flip the arc extinguishing contact 583 so that the end with the inclined surface faces upward and transport it to the clamping hole 5840 of the arc extinguishing spring 584 in the spring transport frame 1;

[0109] A contact conveying frame 3, wherein the contact conveying frame 3 is used to convey the arc extinguishing contact 583 to the contact installation mechanism 2;

[0110] A rotation adjustment mechanism 4, wherein the rotation adjustment mechanism 4 is mounted on the base 6 via a rotation adjustment frame 40, and the rotation adjustment mechanism 4 is used to drive the arc extinguishing contact 583 in the clamping hole 5840 to rotate to a specified angle;

[0111] A spring moving mechanism 7, wherein the spring moving mechanism 7 is used to clamp and pull the arc-extinguishing spring 584 on the spring conveying frame 1;

[0112] The tail end of the shrapnel conveying frame 1 extends below the rotation adjustment mechanism 4 , and the contact mounting mechanism 2 is located below the tail end of the shrapnel conveying frame 1 .

[0113] By adopting the above technical scheme, the cut arc extinguishing contact 583 is rolled and transported to the contact installation mechanism 2 through the contact conveying frame 3, and the end of the arc extinguishing contact 583 with the inclined surface is facing upward and inserted into the insertion hole 5841 of the arc extinguishing spring 584 in the contact installation mechanism 2, and then the angle of the arc extinguishing contact 583 is rotated by rotating the adjustment mechanism 4 so that the fixed groove 5830 on the arc extinguishing contact 583 is aligned with the two sides of the fixed sliding hole 5842, and then the arc extinguishing spring 584 is pulled by the spring moving mechanism 7 to move the arc extinguishing contact 583 from the insertion hole 5841 to the fixed sliding hole 5842, and then the assembled arc extinguishing contact 583 and arc extinguishing spring 584 are taken out by the spring moving mechanism 7, so that the arc extinguishing contacts 583 with different directions and angles are effectively assembled on the arc extinguishing spring 584 after adjustment, without the need for manual operation, thereby effectively improving the assembly efficiency.

[0114] In the embodiment of the present invention, the rotation adjustment frame 40 includes:

[0115] A column 400, wherein the column 400 is vertically arranged on the base 6, and a plurality of columns 400 are arranged;

[0116] A top cover 401, wherein the top cover 401 is fixed to the top of the column 400;

[0117] A first slide plate 402, wherein the first slide plate 402 is slidably connected to the column 400;

[0118] The second slide plate 403 is slidably connected to the column 400 and is located below the first slide plate 402 . The second slide plate 403 is fixedly connected to the first slide plate 402 via a connecting column 404 .

[0119] By adopting the above technical solution, the rotation adjustment mechanism 4 can move in the vertical direction through the rotation adjustment frame 40, making its movement more stable.

[0120] In the embodiment of the present invention, the rotation adjustment mechanism 4 includes:

[0121] A telescopic cylinder 41, wherein the telescopic cylinder 41 is fixed to the bottom of the top cover 401, and an output shaft of the telescopic cylinder 41 is fixedly connected to the first slide plate 402;

[0122] A double-shaft rotary motor 42, wherein the double-shaft rotary motor 42 is provided with a rotary shaft 420, wherein upper and lower ends of the rotary shaft 420 extend out of the upper and lower ends of the double-shaft rotary motor 42, and the double-shaft rotary motor 42 is mounted on the upper side of the second slide plate 403;

[0123] A fixing seat 43, wherein the fixing seat 43 is fixedly mounted on the lower side of the second slide plate 403;

[0124] A rotating member 44, wherein a square groove 440 with a square cross section is formed at the upper end of the rotating member 44, and a groove 441 corresponding to the end with the inclined surface of the arc extinguishing contact 583 is formed at the lower end of the rotating member 44, and the rotating member 44 is rotatably and slidably connected to the lower side of the fixed seat 43;

[0125] The lower end of the rotating shaft 420 passes through the second slide plate 403 and extends into the fixed seat 43 . The lower end of the rotating shaft 420 is configured as a square shaft 421 that matches the square groove 440 . The square shaft 421 is inserted into the square groove 440 for transmission and sliding connection.

[0126] By adopting the above technical solution, in the initial state, the rotating member 44 rotates to an angle that matches the adjusted arc extinguishing contact 583, so that the groove 441 is completely fitted with the adjusted arc extinguishing contact 583; when the contact mounting mechanism 2 inserts the arc extinguishing contact 583 into the arc extinguishing spring 584, the telescopic cylinder 41 extends to drive the first slide plate 402, the second slide plate 403, the fixed seat 43, and the rotating member 44 to move downward, so that the lower end of the rotating member 44 is sleeved on one end of the inclined surface of the arc extinguishing contact 583, and the top of the inclined surface of the arc extinguishing contact 583 abuts against the inclined surface edge of the groove 441. Since it is an inclined surface, as the rotating member 44 is continuously pressed downward, the top of the inclined surface of the arc extinguishing contact 583 abuts against the inclined surface edge of the groove 441. Sliding will occur between the inclined edges of the groove 441, causing the rotating member 44 to rotate until the top of the inclined surface of the arc extinguishing contact 583 abuts against the top of the inclined surface of the groove 441, thereby achieving complete fit; when the rotating member 44 rotates, it drives the rotating shaft 420 of the double-output shaft rotating motor 42 to rotate synchronously. When the top of the inclined surface of the arc extinguishing contact 583 is completely fitted with the top of the inclined surface of the groove 441, the double-output shaft rotating motor 42 is started to drive the rotating shaft 420, the rotating member 44 and the arc extinguishing contact 583 to rotate synchronously, and the arc extinguishing contact 583 is rotated to a specified angle, so that the fixed groove 5830 on the arc extinguishing contact 583 is aligned with both sides of the fixed sliding hole 5842.

[0127] In the embodiment of the present invention, the rotation adjustment mechanism 4 further includes:

[0128] The rotation angle detection device 422 is used to detect the rotation angle and rotation direction of the rotation shaft 420 . The rotation angle detection device 422 is connected to the upper end of the rotation shaft 420 . The rotation angle detection device 422 is installed on the lower side of the first slide plate 402 .

[0129] By adopting the above technical solution, when the telescopic cylinder 41 drives the rotating part 44 to continue to press down, the rotating part 44 rotates under the cooperation with the arc extinguishing contact 583, thereby driving the rotating shaft 420 to rotate. The rotating shaft 420 is connected to the rotation angle detection device 422, so as to detect the rotation angle of the rotating part 44, so that when the top of the inclined surface of the arc extinguishing contact 583 is completely in contact with the top of the inclined surface of the groove 441, the data obtained by the rotation angle detection device 422 is used to control the rotating motor 42 to reverse the same angle, thereby driving the arc extinguishing contact 583 to rotate to the specified angle, so that the fixed groove 5830 on the arc extinguishing contact 583 is aligned with both sides of the fixed slide hole 5842.

[0130] In the embodiment of the present invention, the rotation adjustment mechanism 4 further includes:

[0131] A first sleeve 45, the first sleeve 45 is transmission- and slidingly connected to the outer wall of the rotating member 44, the first sleeve 45 slides along the axial direction of the rotating member 44, the upper and lower ends of the first sleeve 45 are rotationally connected to the fixing seat 43, and a transmission block 450 is protruded on the outer wall of the first sleeve 45;

[0132] A second sleeve ring 46, which is sleeved on the outside of the first sleeve ring 45, and the upper and lower ends of the second sleeve ring 46 are rotatably connected to the fixing seat 43, and a gap is provided between the second sleeve ring 46 and the first sleeve ring 45. An annular transmission groove 460 is provided on the inner wall of the second sleeve ring 46 along its axis, and an angle α formed by the two ends of the transmission groove 460 in the second sleeve ring 46 is greater than 180°;

[0133] A first torsion spring 47, which is sleeved on the outside of the first sleeve ring 45 and located in the gap between the second sleeve ring 46 and the first sleeve ring 45, one end of the first torsion spring 47 is fixedly connected to the first sleeve ring 45, and the other end of the first torsion spring 47 is fixedly connected to the fixing seat 43;

[0134] A second torsion spring 48, wherein the second torsion spring 48 is sleeved on the outside of the second sleeve ring 46, one end of the second torsion spring 48 is fixedly connected to the second sleeve ring 46, and the other end of the second torsion spring 48 is fixedly connected to the fixing seat 43;

[0135] The transmission block 450 extends into the transmission slot 460 . When no external force is applied, the transmission block 450 abuts against one end of the transmission slot 460 . The acting forces of the first torsion spring 47 and the second torsion spring 48 are opposite.

[0136] By adopting the above technical scheme, when the telescopic cylinder 41 drives the rotating member 44 to be continuously pressed down, when the rotating member 44 rotates under the cooperation with the arc extinguishing contact 583, the rotating member 44 will rotate clockwise or counterclockwise relative to the fixed seat 43; when the rotating member 44 rotates clockwise, it will drive the first ring 45 to rotate, and the transmission block 450 slides in the transmission groove 460, thereby pulling one end of the first torsion spring 47 to accumulate force, so that when the rotating member 44 rotates under the cooperation with the arc extinguishing contact 583, it can be closely attached to the arc extinguishing contact 583, and the cooperation with the arc extinguishing contact 583 is tighter, thereby avoiding slipping; when the rotating member 44 rotates counterclockwise, it will drive the second ring 46 to rotate counterclockwise through the cooperation of the transmission block 450 and the transmission groove 460, thereby pulling one end of the second torsion spring 48 to accumulate force, and can cooperate with the rotating member 44 to rotate in both directions.

[0137] In the embodiment of the present invention, the rotation adjustment mechanism 4 further includes:

[0138] The spring 49 is disposed between the upper end of the rotating member 44 and the fixing seat 43 .

[0139] By adopting the above-mentioned technical solution, when the telescopic cylinder 41 drives the rotating part 44 to be continuously pressed downward and the rotating part 44 contacts the arc extinguishing contact 583, the spring 49 will be compressed. Under the action of the spring 49, the rotating part 44 can be pressed tightly against the arc extinguishing contact 583, thereby maintaining the contact state, making the contact between the rotating part 44 and the arc extinguishing contact 583 more stable.

[0140] In an embodiment of the present invention, the contact mounting mechanism 2 comprises:

[0141] The runner 20 is cylindrical and hollow inside. The runner 20 includes two top plates 200 arranged at the ends and a side plate 201 arranged on the outer side wall. The side plate 201 is provided with an opening 202 for the arc extinguishing contact 583 to enter and exit. The runner 20 is rotatably connected to the base 6 through a first leg 203;

[0142] A rotation box 21, the front side wall and upper and lower ends of the rotation box 21 are both set as openings 210, and a receiving space 211 for placing the arc extinguishing contact 583 is provided in the rotation box 21. A rotating shaft 212 is protruded from the middle of the side walls on the left and right sides of the rotation box 21. The upper and lower ends of the rotation box 21 are both hinged with a flap 213, and the flap 213 is provided with an opening 2130. The diameter of the opening 2130 is smaller than the outer diameter of the arc extinguishing contact 583. The flap 213 is pressed against the upper and lower ends of the rotation box 21 by a torsion spring;

[0143] A second support leg 22, wherein two second support legs 22 are provided and arranged in parallel between the two top plates 200;

[0144] An electromagnetic reset mechanism 23, which is disposed on the second support leg 22 and connected to the rotating shaft 212;

[0145] The ejection cylinder 24 is fixed in the rotating wheel 20, the telescopic shaft 240 of the ejection cylinder 24 has a diameter smaller than the inner diameter of the opening 2130, and the telescopic shaft 240 of the ejection cylinder 24 passes through the opening 2130 so that the arc extinguishing contact 583 pushes the flap 213 to be ejected from the accommodating space 211;

[0146] The tail end of the contact conveying frame 3 is arranged close to the outer wall of the rotating wheel 20 , and the self-rotating box 21 is freely rotatably connected between the two second legs 22 via a rotating shaft 212 . The self-rotating box 21 is arranged at the opening 202 .

[0147] By adopting the above technical solution, when the opening 202 on the rotating wheel 20 rotates to the side facing the contact conveying frame 3, the arc extinguishing contact 583 on the contact conveying frame 3 automatically rolls into the accommodating space 211 of the rotating box 21, and then the rotating wheel 20 continues to rotate, and the remaining arc extinguishing contacts 583 are blocked on the outside of the side plate 201. When the rotating box 21 moves to the upper end of the rotating wheel 20, it pauses. At this time, since one end of the arc extinguishing contact 583 is an inclined surface, the weight of the other end will be greater than the weight of one end of the inclined surface. Under the action of gravity, the heavier end of the arc extinguishing contact 583 will drive the rotating box 21 to automatically flip, so that the opening 210 turns from facing the opening 202 to facing the top plate 200, thereby achieving no matter entering the accommodating space 211 Which direction the arc extinguishing contact 583 inside is facing, when the rotating box 21 reaches the upper end of the rotating wheel 20, the end with the inclined surface can always remain in an upward state, and then the telescopic shaft 240 of the ejecting cylinder 24 passes through the opening 2130 of the flap 213 at the lower end to push the arc extinguishing contact 583 upward to open the flap 213 at the upper end, and the arc extinguishing contact 583 is ejected out of the accommodating space 211 and inserted into the insertion hole 5841 of the arc extinguishing spring 584; when the arc extinguishing contact 583 and the arc extinguishing spring 584 are assembled, the ejecting cylinder 24 retracts, the rotating wheel 20 continues to rotate, and then the electromagnetic reset mechanism 23 is started, so that the rotating box 21 rotates between the second legs 22, and the opening 210 is set toward the opening 202, so as to facilitate the entry of the next arc extinguishing contact 583.

[0148] In the embodiment of the present invention, the contact installation mechanism 2 further includes:

[0149] The limiting cylinder 25 is provided with two limiting cylinders 25 and is respectively located on the two top plates 200. The output shaft of the limiting cylinder 25 is arranged toward the rotation box 21. The output shafts of the two limiting cylinders 25 are provided with a pressing plate 250. When the output shafts of the limiting cylinders 25 are extended, one of the pressing plates 250 enters the accommodating space 211 to limit the arc extinguishing contact 583, and the other pressing plate 250 abuts against the outer side of the rotation box 21 to prevent the rotation box 21 from rotating.

[0150] Among them, an abutment groove 214 for the pressure plate 250 to insert and abut is provided on the back side wall of the rotating box 21, and the extension strokes of the two limit cylinders 25 are consistent. When one of the pressure plates 250 abuts against the arc extinguishing contact 583, the other pressure plate 250 abuts against the abutment groove 214.

[0151] By adopting the above technical solution, when the self-rotating box 21 moves to the upper end of the runner 20, the output shafts of the two limit cylinders 25 extend simultaneously. The pressing plate 250 on one side extends into the accommodation space 211 and abuts against the arc extinguishing contact 583, thereby limiting the horizontal direction of the arc extinguishing contact 583. The pressing plate 250 on the other side extends into the abutting groove 214, thereby preventing the self-rotating box 21 from shaking, effectively improving the stability and making the arc extinguishing contact 583 more stable when it is pushed out.

[0152] In the embodiment of the present invention, the electromagnetic reset mechanism 23 includes:

[0153] An outer iron core 230, the outer iron core 230 is arranged in a "C" shape. First fixed ends 2300 protrude from both ends of the outer iron core 230, and a second fixed end 2301 protrudes from the inner side of the middle of the outer iron core 230. A coil winding 2302 is wound around the second fixed end 2301. The outer iron core 230, the first fixed ends 2300, and the second fixed end 2301 are integrally formed. The second fixed end 2301 is arranged on the side close to the side plate 201;

[0154] An inner iron core 231, the inner iron core 231 is fixedly connected to one end of the rotating shaft 212. Two first moving ends 2310 that cooperate with the first fixed ends 2300 and a second moving end 2311 that cooperate with the second fixed end 2301 protrude from the outer wall of the inner iron core 231. The inner iron core 231, the first moving ends 2310, and the second moving end 2311 are integrally formed. The second moving end 2311 is arranged on the side close to the opening 210;

[0155] Wherein, the outer iron core 230 is fixedly installed on the second support leg 22, and the inner iron core 231 is rotatably connected inside the outer iron core 230.

[0156] By adopting the above technical solution, when the electromagnetic reset mechanism 23 is not powered on and started, the inner iron core 231 can freely rotate inside the outer iron core 230; after the electromagnetic reset mechanism 23 is started, the coil winding 2302 is powered on, and the magnetic flux is shunted from the second fixed end 2301 to the two first fixed ends 2300, causing a magnetic field to be generated at the first fixed ends 2300 and the second fixed end 2301 on the outer iron core 230. The inner iron core 231 rotates under the action of the magnetic field, causing the second moving end 2311 to rotate closer to the second fixed end 2301, thereby driving the self-rotating box 21 to rotate through the rotating shaft 212, making the opening 210 face the opening 202, facilitating the arc extinguishing contact 583 to enter the accommodation space 211.

[0157] In an embodiment of the present invention, the inner side surfaces of the first fixed end 2300 and the second fixed end 2301 and the outer side surfaces of the first movable end 2310 and the second movable end 2311 are set to corresponding arc shapes, the circumference angle β2 of the second movable end 2311 is 60° larger than the circumference angle β1 of the first movable end 2310, the circumference angle γ2 of the second fixed end 2301 is 60° larger than the circumference angle γ1 of the first fixed end 2300, and the circumference angle γ2 of the second fixed end 2301 is greater than the circumference angle β2 of the second movable end 2311.

[0158] By adopting the above technical solution, when the arc extinguishing contact 583 and the arc extinguishing spring 584 are assembled, the ejection cylinder 24 is retracted, and the rotating wheel 20 continues to rotate. When the rotating box 21 moves to the lower end of the rotating wheel 20, since the weight of the second movable end 2311 is greater than the weight of the first movable end 2310, under the action of gravity, the second movable end 2311 will swing down and approach the second fixed end 2301, thereby driving the inner iron core 231 and the rotating shaft 212 to rotate, so that the side of the rotating box 21 with the opening 210 is facing It rotates toward the opening 202 to achieve pre-reset, so that after power is turned on, the second movable end 2311 can be effectively affected by the magnetic field of the second fixed end 2301, so that the resetting effect is better; the magnetic field generated by the second fixed end 2301 is greater than the magnetic field generated by the first fixed end 2300, and at the same time, the magnetic force received by the second movable end 2311 is greater than the magnetic force received by the first movable end 2310, so that after the coil winding 2302 is powered on, the second movable end 2311 can quickly rotate toward the second fixed end 2301, and the resetting is more accurate and rapid.

[0159] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-phase load isolating switch, characterized in that: include, An arc extinguishing chamber (580), the arc extinguishing chamber (580) comprising a left arc extinguishing plate (5800) and a right arc extinguishing plate (5801) that are fixedly connected, an arc extinguishing space (5802) being provided between the left arc extinguishing plate (5800) and the right arc extinguishing plate (5801), and an inlet (5805) being provided at an upper end of the arc extinguishing chamber (580) that is inclined outwards; An arc extinguishing chamber mounting plate (582), the arc extinguishing chamber mounting plate (582) being electrically connected to the incoming line terminal and fixedly connected to the arc extinguishing chamber (580); An arc extinguishing contact (583), wherein the arc extinguishing contact (583) is arranged in a cylindrical shape; An arc-extinguishing shrapnel (584), the lower end of which is electrically connected to the arc-extinguishing chamber mounting plate (582) via bolts and fixed to the outer wall of the arc-extinguishing chamber (580), the arc-extinguishing shrapnel (584) is provided with a snap-in hole (5840) for snap-in mounting of the arc-extinguishing contact (583), and the arc-extinguishing shrapnel (584) is made of a conductive elastic metal material; A through hole (5803) for the arc extinguishing contact (583) to pass through is provided on an outer wall of one side of the arc extinguishing chamber (580); the arc extinguishing contact (583) is electrically connected to the arc extinguishing spring (584) and extends into the arc extinguishing space (5802); and a gap is provided between the lower side of the arc extinguishing contact (583) and the bottom of the arc extinguishing space (5802).

2. A three-phase load isolating switch according to claim 1, characterized in that: The card connection hole (5840) comprises: An insertion circular hole (5841), wherein the inner diameter of the insertion circular hole (5841) matches the outer diameter of the arc extinguishing contact (583); Fixed sliding holes (5842), wherein a spacing between the fixed sliding holes (5842) is smaller than an outer diameter of the arc extinguishing contact (583); The insertion circular hole (5841) is connected to the fixed sliding hole (5842), the fixed sliding hole (5842) is arranged close to the end of the arc extinguishing spring (584), and two fixed grooves (5830) that are far away from each other are opened on the outer wall of the arc extinguishing contact (583), the width of the fixed groove (5830) is greater than the thickness of the arc extinguishing spring (584), and the spacing of the fixed sliding hole (5842) corresponds to the distance between the bottoms of the two fixed grooves (5830).

3. A three-phase load isolating switch according to claim 1, characterized in that: One end of the arc extinguishing contact (583) extending into the arc extinguishing space (5802) is arranged as an inclined surface, and the inclined surface is arranged toward the upper side.

4. A production process for a three-phase load isolating switch as claimed in claim 2, characterized in that: The steps include: S1: First, fixing grooves (5830) are obtained by cutting on both sides of the pipe fitting, and then multiple groups of fixing grooves (5830) are cut in sequence along the length direction of the pipe fitting; S2: Then, the end of the pipe is cut by an inclined blade to obtain a first arc-extinguishing contact (583), and then the end of the pipe is cut by a vertical blade to obtain a second arc-extinguishing contact (583), and the cutting is repeated in this way; S3: deburring and grinding the arc extinguishing contact (583); S4: placing the treated arc-extinguishing contact (583) in liquid nitrogen for 0.5-2 hours; S5: Take out the arc extinguishing contact (583), and install the arc extinguishing contact (583) on the arc extinguishing shrapnel (584) using a contact assembly machine; S6: Assemble the arc extinguishing spring (584) with the arc extinguishing contact (583) onto the arc extinguishing chamber (580).

5. The production process of a three-phase load isolating switch according to claim 4, characterized in that: The contact assembly machine comprises: A shrapnel conveying rack (1), the shrapnel conveying rack (1) being used for conveying arc-extinguishing shrapnel (584); A contact mounting mechanism (2), the contact mounting mechanism (2) being used to flip the arc extinguishing contact (583) so that the end with the inclined surface faces upwards and transport it to a clamping hole (5840) of the arc extinguishing spring (584) in the spring transport rack (1); A contact conveying frame (3), the contact conveying frame (3) being used to convey the arc extinguishing contact (583) into the contact mounting mechanism (2); A rotation adjustment mechanism (4), the rotation adjustment mechanism (4) being mounted on the base (6) via a rotation adjustment frame (40), the rotation adjustment mechanism (4) being used to drive the arc extinguishing contact (583) in the clamping hole (5840) to rotate to a specified angle; A spring moving mechanism (7), the spring moving mechanism (7) being used to clamp and pull the arc-extinguishing spring (584) on the spring conveying frame (1); The tail end of the shrapnel conveying frame (1) extends below the rotation adjustment mechanism (4), and the contact mounting mechanism (2) is located below the tail end of the shrapnel conveying frame (1).

6. The production process of a three-phase load isolating switch according to claim 5, characterized in that: The rotating adjustment frame (40) comprises: A column (400), wherein the column (400) is vertically arranged on the base (6), and a plurality of columns (400) are arranged; A top cover (401), wherein the top cover (401) is fixed to the top of the column (400); A first slide plate (402), the first slide plate (402) being slidably connected to the column (400); A second slide plate (403), the second slide plate (403) is slidably connected to the column (400) and is located below the first slide plate (402), and the second slide plate (403) is fixedly connected to the first slide plate (402) via a connecting column (404).

7. The production process of a three-phase load isolating switch according to claim 6, characterized in that: The rotation adjustment mechanism (4) comprises: A telescopic cylinder (41), wherein the telescopic cylinder (41) is fixed to the bottom of the top cover (401), and an output shaft of the telescopic cylinder (41) is fixedly connected to the first slide plate (402); A double-shaft rotating motor (42), wherein the double-shaft rotating motor (42) is provided with a rotating shaft (420), wherein upper and lower ends of the rotating shaft (420) extend out of upper and lower ends of the double-shaft rotating motor (42), and the double-shaft rotating motor (42) is mounted on the upper side of the second slide plate (403); A fixing seat (43), wherein the fixing seat (43) is fixedly mounted on the lower side of the second slide plate (403); A rotating member (44), wherein a square groove (440) having a square cross-section is provided at the upper end of the rotating member (44), a groove (441) corresponding to an end of the arc extinguishing contact (583) with an inclined surface is provided at the lower end of the rotating member (44), and the rotating member (44) is rotatably and slidably connected to the lower side of the fixed seat (43); The lower end of the rotating shaft (420) passes through the second slide plate (403) and extends into the fixed seat (43); the lower end of the rotating shaft (420) is configured as a square shaft (421) that matches the square groove (440); the square shaft (421) is inserted into the square groove (440) for transmission and sliding connection.

8. The production process of a three-phase load isolating switch according to claim 7, characterized in that: The rotation adjustment mechanism (4) further comprises: A rotation angle detection device (422) is used to detect the rotation angle and rotation direction of the rotation shaft (420), the rotation angle detection device (422) is connected to the upper end of the rotation shaft (420), and the rotation angle detection device (422) is installed on the lower side of the first slide plate (402).

9. The production process of a three-phase load isolating switch according to claim 7, characterized in that: The rotation adjustment mechanism (4) further comprises: a first sleeve ring (45), the first sleeve ring (45) being transmission-connected and slidably connected to the outer wall of the rotating member (44); the first sleeve ring (45) slides along the axial direction of the rotating member (44); the upper and lower ends of the first sleeve ring (45) are rotationally connected to the fixed seat (43); and a transmission block (450) is protruding from the outer wall of the first sleeve ring (45); a second sleeve ring (46), the second sleeve ring (46) being sleeved on the outside of the first sleeve ring (45), the upper and lower ends of the second sleeve ring (46) being rotatably connected to the fixing seat (43), a gap being provided between the second sleeve ring (46) and the first sleeve ring (45), an annular transmission groove (460) being provided on the inner wall of the second sleeve ring (46) along its axis, and an angle (α) formed by the two ends of the transmission groove (460) in the second sleeve ring (46) being greater than 180°; a first torsion spring (47), the first torsion spring (47) being sleeved on the outside of the first sleeve ring (45) and being located in a gap between the second sleeve ring (46) and the first sleeve ring (45), one end of the first torsion spring (47) being fixedly connected to the first sleeve ring (45), and the other end of the first torsion spring (47) being fixedly connected to the fixing seat (43); a second torsion spring (48), wherein the second torsion spring (48) is sleeved on the outside of the second sleeve ring (46), one end of the second torsion spring (48) is fixedly connected to the second sleeve ring (46), and the other end of the second torsion spring (48) is fixedly connected to the fixing seat (43); The transmission block (450) extends into the transmission slot (460), and when no external force is applied, the transmission block (450) abuts against one end of the transmission slot (460), and the acting forces of the first torsion spring (47) and the second torsion spring (48) are opposite.

10. The production process of a three-phase load isolating switch according to claim 7, characterized in that: The rotation adjustment mechanism (4) further comprises: A spring (49) is provided between the upper end of the rotating member (44) and the fixed seat (43).

Images