CN114336339A - Manual bypass cabinet of high-pressure frequency conversion with auto-lock effect - Google Patents

Abstract

The invention discloses a high-voltage frequency conversion manual bypass cabinet with a self-locking effect, which comprises a cabinet body and three single-pole double-throw switches, wherein a front plate is fixedly connected to the front end surface of the cabinet body, a cavity is formed in the front plate, a switch assembly is arranged in the cavity, the output end of the switch assembly is fixedly connected with the input end of the single-pole double-throw switch, a connecting rod is arranged in the cavity, a locking assembly is inserted and arranged in the connecting rod, the locking assembly is matched with the switch assembly, an inserting rod is slidably arranged in the cavity, a plurality of notches are formed in the inserting rod, the notches are inserted and matched with the locking assembly, a through hole is vertically formed in the bottom surface of the connecting rod, a locking rod is arranged in the through hole, a wedge block is slidably arranged at the bottom of the inserting rod, a rack II is fixedly connected to one side surface of the wedge block, rotating rods are symmetrically arranged in the front plate, a sealing door is arranged between the two rotating rods, and one end of the rotating rod is fixedly connected with a gear, one side of the sealing door is provided with a socket, the structure of the invention is reasonable, and the problem of low safety of the bypass cabinet is solved.

Description

A high-voltage variable frequency manual bypass cabinet with self-locking effect

technical field

The invention relates to the technical field of power cabinets, in particular to a high-voltage variable frequency manual bypass cabinet with self-locking effect.

Background technique

Both transmission and distribution facilities include substations, lines and other equipment. All transmission equipment is connected to form a transmission network. The network composed of distribution equipment from the transmission network to the users is called the distribution network. They are also sometimes called transmission and distribution systems. The power transmission system and distribution system plus power plants and electrical equipment are collectively referred to as the power system. Various power devices in the power system have their own rated voltages, which constitute the voltage level of the entire power system. The voltage used for transmission is higher than the distribution voltage. The division of transmission and distribution voltage boundaries is not fixed, and changes with the area and capacity of the grid, and bypass cabinets are used in this process.

When the traditional bypass cabinet is in use, the cabinet door can be directly opened during use, or the closing operation can be carried out when the cabinet door is not closed. The safety is low and it is easy to cause danger. In view of the above problems, the following is proposed. solution.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-voltage variable frequency manual bypass cabinet with self-locking effect to solve the problem of low safety of the bypass cabinet.

The above-mentioned technical purpose of the present invention is achieved through the following technical solutions:

A high-voltage frequency conversion manual bypass cabinet with self-locking effect, comprising a cabinet body and three SPDT switches arranged in an up and down arrangement inside the cabinet body, the front end surface of the cabinet body is fixedly connected with a front plate, and the front A cavity is opened inside the board, a switch assembly is arranged inside the cavity, the switch assembly passes through the cavity, the output end of the switch assembly is fixedly connected with the input end of the SPDT switch, and the cavity is arranged inside There is a connecting rod at the bottom of the switch assembly, a locking assembly is inserted through the connecting rod, the input end of the locking assembly passes through the cavity, one end of the locking assembly is inserted and matched with the switch assembly, and the cavity slides inside There is an insertion rod at the bottom of the locking assembly, a number of notches are opened on the insertion rod, the notches and the other end of the locking assembly are inserted and matched, and the bottom surface of the insertion rod is fixedly connected with a rack. One side of the rod is rotatably provided with a circular plate, the side of the circular plate is fixedly connected with a toothed ring that meshes with the rack, the bottom surface of the connecting rod is vertically opened with a through hole, and the interior of the through hole is provided with Locking lever, a wedge-shaped block is slid laterally at the bottom of the insertion rod, two racks are fixedly connected to one side of the wedge-shaped block, and a rotating rod is arranged symmetrically and rotatably inside the front plate. There is a sealing door fixedly connected with the two rotating rods, and one end of the rotating rod close to the second rack is fixedly connected with a gear that meshes with the second rack, and the side of the sealing door close to the insertion rod is provided with A socket corresponding to the plunger.

With the above technical solution, when the interior of the cabinet needs to be repaired, the user first activates the switch assembly, and the switch assembly will drive the three SPDT switches to close. When the three SPDT switches are closed, the locking assembly of the switch assembly is opposite to , push the locking assembly so that the locking assembly slides out from the notch and moves to the inside of the switch assembly. At this time, the locking assembly limits the switch assembly, so that the switch assembly cannot be adjusted. At the same time, the locking assembly removes the restriction on the insertion rod and rotates The circular plate drives the gear ring to rotate. When the gear ring rotates, it drives the intermeshing racks to move. When the rack moves, it drives the insertion rod to move, so that one end of the insertion rod is moved out of the socket of the sealing door, so that the insertion rod is removed. The restriction on the sealing door enables the sealing door to rotate freely around the rotating rod. When the sealing door rotates, the rotating rod rotates, and the rotation of the rotating rod drives the gear to rotate. The rotation of the gear will push the rack two to move, and the movement of the rack two will drive the wedge Move, so that the inclined surface of the wedge-shaped block will push the locking rod upward, and the obtained locking rod is inserted into the through hole, and the locking rod is fixed by the locking rod, so as to prevent the insertion rod from being pushed out when the sealing door is not closed in place, resulting in the failure of the sealing door. Close incomplete, improve security.

Preferably, the locking assembly includes a locking rod, a push rod, a side plate, a spring 1, a sliding rod and a clamping ball. There are three locking rods, and the three locking rods pass through the connecting rods in sequence. A chute is provided at the corresponding connecting rod, the push rod is slidably arranged inside the chute, and one end of the push rod is fixedly connected to the side of the locking rod, the side plate is located on one side of the locking rod, and the side The plate is fixedly connected with the connecting rod, the sliding rod is located between the side plate and the locking rod, one end of the sliding rod is fixedly connected with the locking rod, the spring is set on the sliding rod, and the clamping ball is slidably arranged on the locking rod. On the sliding rod, two ends of the spring 1 are respectively in contact with the clamping ball and the locking rod, and the side plate is provided with two bayonets for matching with the clamping ball from top to bottom.

Using the above technical solution, push the push rod, the push rod slides inside the chute under force, the push rod will push the locking rod to move, when the locking rod moves, it drives the sliding rod on the locking rod to move, and when the sliding rod moves, it drives the card ball to move, So that the card ball moves out from one of the bayonet, when the card ball moves out of the bayonet, it will squeeze the spring one, so that the spring one generates pressure, when the card ball moves to the other bayonet, the elastic force of the spring one will push The clamping ball moves, so that the clamping ball is pushed into the bayonet by the spring, and the locking rod is prevented from moving under the action of its own gravity through the cooperation between the clamping ball and the bayonet.

Preferably, the switch assembly includes a turntable and a pull rod, the front plate is provided with three turning slots, the turntable is provided with three and are respectively rotatably arranged in the corresponding turning slots, and the side surface of the turntable is provided with an arc. One end of the pull rod is rotatably arranged inside the arc-shaped groove, and a pull sleeve is connected to the rotation of one end of the pull rod, and one end of the pull sleeve is sleeved on the output end of the SPDT switch. The arc surface is provided with a locking opening matched with the locking assembly, and the locking opening is located at one end of the turning slot.

Using the above technical solution, when the turntable is rotated, the turntable is forced to rotate inside the turntable, the turntable rotation will drive the arc groove on the turntable to rotate, the arc groove will drive the pull rod to move, the pull rod movement will drive the pull sleeve to rotate, and the pull sleeve rotates It will drive the output end of the SPDT switch to rotate. When the turntable pulls the SPDT switch to the off state, the locking port and the locking block are located on the same vertical line.

Preferably, three electromagnetic locks are fixedly connected to the end face of the front plate, two limit openings are opened on the sides of the three turntables, and the output ends of the three electromagnetic locks correspond to limit openings at the same position of the three turntables. .

With the above technical solution, when the electromagnetic lock is activated, the output end of the electromagnetic lock will be inserted into the limit opening, and the turntable will be locked through the electromagnetic lock to avoid accidental touch. There are two limit openings on the same turntable corresponding to switches respectively. The two states of the assembly can lock the turntable.

Preferably, a threaded opening is provided on the circular arc surface of the turntable, and a switch rod is threadedly fitted inside one of the threaded openings.

With the above technical solution, the switch rod is convenient for the user to rotate the turntable, and the switch rod matched with the thread is convenient for the user to take out after adjusting the turntable, so as to avoid accidental touch and ensure safety.

Preferably, an arc-shaped plate is arranged on the side of the circular plate, a sleeve is fixedly connected to one side of the arc-shaped plate, a push rod is slidably arranged inside the sleeve, and a push rod is arranged between the sleeve and the push rod. Spring 2, the two ends of the spring 2 are respectively fixedly connected with the side surface of the sleeve and the ejector rod, one end of the ejector rod is fixedly connected with a hemisphere, and the side of the disk is provided with two clamps connected with the hemisphere. card slot.

With the above technical solution, when the circular plate rotates, the rotating plate drives the card slot to rotate, the card slot will squeeze the hemisphere, and the hemisphere will squeeze the ejector rod when the hemisphere is stressed, so that the top cover is retracted into the casing, and the ejector rod moves when The second spring will be squeezed, so that the second spring will be deformed to produce elastic force. When the next slot corresponds to the hemisphere, the elastic force of the second spring will push the ejector rod, and the ejector rod will drive the hemisphere, so that the hemisphere is stuck into the other. Inside the card slot, the cooperation between the card slot and the hemispherical ball facilitates the user to locate the position of the insertion rod, and the hemispherical ball plays a role in positioning the circular plate to prevent the circular plate from rotating at will.

Preferably, the side surface of the circular plate is fixedly connected with a telescopic rod for rotating the circular plate.

By adopting the above technical solution, the telescopic rod in the extended state is convenient to rotate the circular plate, and the telescopic rod in the shortened state is convenient for storage.

Preferably, the bottom of the locking rod is provided with an oblique opening.

By adopting the above technical solution, the inclined opening facilitates the insertion of the wedge-shaped block.

The beneficial effect is that when the sealing door is completely sealed, the locking rod can be moved out from the inside of the through hole at this time, and the insertion rod can be slid at this time, and the sealing door can be locked, so that the insertion rod can be removed when the sealing door is not completely closed. , resulting in incomplete closing. After the rod is matched with the socket, the notch corresponds to the locking device, and the locking device can be removed from the inside of the switch assembly. Only when the sealing door is completely closed can the switch assembly be activated to respond to the SPDT switch. to close. Fully guarantee safety.

Description of drawings

Fig. 1 is the structural representation of embodiment;

2 is a schematic diagram of an embodiment for showing a cavity;

Figure 3 is a cross-sectional view of a side view of the cabinet;

Figure 4 is an enlarged view of A;

Figure 5 is an enlarged view of B;

Figure 6 is an enlarged view of C;

Figure 7 is an enlarged view of the embodiment for illustrating the slide bar and sleeve.

Reference signs: 1. Cabinet body; 2. SPDT switch; 3. Front plate; 4. Cavity; 5. Switch assembly; 6. Connecting rod; 7. Locking assembly; 8. Inserting rod; 9. Notch ;10, rack one; 11, circular plate; 12, gear ring; 13, through hole; 14, locking rod; 15, wedge block; 16, rack two; 17, rotating rod; 18, sealing door; 19, Gear; 20, socket; 21, locking rod; 22, push rod; 23, side plate; 24, spring one; 25, sliding rod; 26, card ball; 27, chute; 28, bayonet; 29, turntable; 30, pull rod; 31, turn slot; 32, arc slot; 33, pull sleeve; 34, locking port; 35, electromagnetic lock; 36, limit port; 37, threaded port; 38, switch lever; 39, arc plate; 40, casing; 41, ejector rod; 42, spring two; 43, hemisphere; 44, card slot; 45, telescopic rod; 46, oblique mouth.

Detailed ways

The following description is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions that belong to the idea of the present invention should belong to the protection scope of the present invention. At the same time, it should be pointed out that, for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

As shown in Figures 1 to 7, a high-voltage variable frequency manual bypass cabinet with self-locking effect includes a cabinet 1 and three SPDT switches 2 installed inside the cabinet 1 in an up and down arrangement. The front end of the cabinet 1 A front plate 3 is fixedly connected to the surface, a cavity 4 is opened inside the front plate 3, a switch assembly 5 is arranged inside the cavity 4, the switch assembly 5 includes a turntable 29 and a pull rod 30, and three turn slots 31 are opened on the front plate 3. 29 is provided with three and are respectively rotated and arranged in the corresponding turning grooves 31, the side of the turntable 29 is provided with an arc-shaped groove 32, one end of the pull rod 30 is rotated and arranged inside the arc-shaped groove 32, and the rotation of one end of the pull rod 30 is connected with a pull rod. Sleeve 33, one end of the pull sleeve 33 is sleeved on the output end of the SPDT switch 2, a threaded opening 37 is provided on the arc surface of the turntable 29, and one of the threaded openings 37 is internally threaded with a switch rod 38. 38 is convenient for the user to rotate the turntable 29, and the switch rod 38 matched with the thread is convenient for the user to take out after adjusting the turntable 29, so as to avoid accidental touch and ensure safety.

When the interior of the cabinet 1 needs to be repaired, the turntable 29 is rotated by the switch lever 38, and the turntable 29 is rotated inside the turntable 31 under force. When the pull-rod 30 moves, the pull-rod 30 moves the pull-sleeve 33 to rotate, the pull-sleeve 33 rotates to drive the output end of the SPDT switch 2 to rotate, and the switch assembly 5 drives the three SPDT switches 2 to close.

A connecting rod 6 at the bottom of the switch assembly 5 is provided inside the cavity 4, a locking assembly 7 is interspersed in the connecting rod 6, and an inserting rod 8 at the bottom of the locking assembly 7 is slidably arranged inside the cavity 4. There are several notches 9, and the locking assembly 7 includes a locking rod 2114, a push rod 22, a side plate 23, a spring one 24, a sliding rod 25 and a locking ball 26. There are three locking rods 2114, and the three locking rods 2114 pass through the connecting rods in sequence. 6. The cavity 4 is provided with a chute 27 corresponding to the connecting rod 6, the push rod 22 is slidably arranged inside the chute 27, and one end of the push rod 22 is fixedly connected to the side of the locking rod 2114, and the side plate 23 is located at the side of the locking rod 2114. One side, and the side plate 23 is fixedly connected with the connecting rod 6, the sliding rod 25 is located between the side plate 23 and the locking rod 2114, one end of the sliding rod 25 is fixedly connected with the locking rod 2114, and the spring one 24 is sleeved on the sliding rod 25 , the clamping ball 26 is slidably arranged on the sliding rod 25, the two ends of the spring one 24 are in contact with the clamping ball 26 and the locking rod 2114, respectively, and the side plate 23 is provided with two bayonet 28 that cooperates with the clamping ball 26 from top to bottom. .

The circular arc surface of the turntable 29 is provided with a locking opening 34 that cooperates with the locking assembly 7. The locking opening 34 is located at one end of the turning slot 31. When the turntable 29 pulls the SPDT switch 2 to the off state, the locking opening 34 is at this time. On the same vertical line as the locking block, push the push rod 22, the push rod 22 slides inside the chute 27 under force, and the push rod 22 will push the locking rod 2114 to move, so that the locking rod 2114 moves out of the notch 9 and moves to Inside the locking port 34, at this time, the locking assembly 7 limits the switch assembly 5, so that the switch assembly 5 cannot be adjusted. The clamping ball 26 moves, so that the clamping ball 26 moves out from one of the bayonet openings 28. When the clamping ball 26 moves out of the bayonet opening 28, it will squeeze the spring one 24, so that the spring one 24 generates pressure. When a bayonet 28 is located, the elastic force of the spring one 24 will push the catch ball 26 to move, so that the catch ball 26 is pushed into the bayonet 28 by the spring. move under its own weight.

The interior of the front plate 3 is symmetrical and rotatably provided with a rotating rod 17, a sealing door 18 fixedly connected to the two rotating rods 17 is arranged between the two rotating rods 17, and a side of the sealing door 18 close to the insertion rod 8 is provided with a plug-in door 18. The sockets 20 of the rods 8 correspond to each other, the bottom surface of the rod 8 is fixedly connected with the rack one 10, one side of the rod 8 is rotatably provided with the circular plate 11, and the side of the circular plate 11 is fixedly connected with the rack one 10. The toothed ring 12, the side of the circular plate 11 is fixedly connected with a telescopic rod 45 for rotating the circular plate 11, the telescopic rod 45 in the extended state is convenient to rotate the circular plate 11, the telescopic rod 45 in the shortened state is convenient for storage, the circular plate 11 An arc plate 39 is arranged on the side of the arc plate 39, a sleeve 40 is fixedly connected to one side of the arc plate 39, a push rod 41 is slidably arranged inside the sleeve 40, and a spring II 42 is arranged between the sleeve 40 and the push rod 41, and the spring II The two ends of 42 are respectively fixedly connected with the side surfaces of the sleeve 40 and the ejector rod 41 . One end of the ejector rod 41 is fixedly connected with a hemisphere 43 , and the side of the disc is provided with two slots 44 for engaging with the hemisphere 43 .

Rotating the circular plate 11, the circular plate 11 drives the toothed ring 12 to rotate, when the toothed ring 12 rotates, it drives the intermeshing rack-10 to move; when the rack-10 moves, it drives the insertion rod 8 to move, so that one end of the insertion rod 8 is removed from the sealing door. The inside of the socket 20 of the 18 is moved out, so that the insertion rod 8 removes the restriction on the sealing door 18, so that the sealing door 18 can freely rotate around the rotating rod 17. When the circular plate 11 rotates, the rotating plate drives the card slot 44 to rotate, and the card slot 44 will rotate. Squeeze the hemisphere 43, the hemisphere 43 will squeeze the ejector rod 41 under force, so that the top cover is retracted into the sleeve 40, and the ejector rod 41 will squeeze the spring two 42 when moving, so that the spring two 42 is deformed by force. Elastic force, when the next card slot 44 corresponds to the hemisphere 43, the elastic force of the second spring 42 will push the ejector rod 41, and the ejector rod 41 will drive the hemisphere 43, so that the hemisphere 43 is stuck into the other card slot 44, and the The cooperation between the groove 44 and the semicircular ball 43 is convenient for the user to locate the position of the plunger 8 , and the semicircular ball 43 plays a role in positioning the circular plate 11 to prevent the circular plate 11 from rotating at will.

A through hole 13 is vertically opened on the bottom surface of the connecting rod 6, a locking rod 2114 is arranged inside the through hole 13, and an oblique opening 46 is opened at the bottom of the locking rod 2114. A wedge block 15 is provided, one side of the wedge block 15 is fixedly connected with the second rack 16 , and one end of the rotating rod 17 close to the second rack 16 is fixedly connected with a gear 19 that meshes with the second rack 16 .

When the sealing door 18 rotates, it drives the rotating rod 17 to rotate, and the rotating rod 17 drives the gear 19 to rotate. The locking lever 2114 will be pushed upward, and the obtained locking lever 2114 will be inserted into the through hole 13, and the locking lever 2114 will be fixed by the locking lever 2114, so as to prevent the insertion lever 8 from being pushed out when the sealing door 18 is not closed in place, causing the sealing door 18 to fail. Close incomplete, improve security.

When the sealing door 18 is completely sealed, the locking rod 2114 can be moved out from the inside of the through hole 13 at this time, and the insertion rod 8 can be slid at this time, and the sealing door 18 can be locked. The rod 8 can be moved out, resulting in incomplete closing. After the insertion rod 8 is matched with the socket 20, the notch 9 corresponds to the locking device at this time, and the locking device can be removed from the inside of the switch assembly 5. Only when the sealing door 18 is completely closed can it be removed. The switch assembly 5 can be activated to close the SPDT switch 2 . Fully guarantee safety.

The end face of the front plate 3 is fixedly connected with three electromagnetic locks 35 , the sides of the three turntables 29 are provided with two limit ports 36 , and the output ends of the three electromagnetic locks 35 correspond to the limit ports 36 at the same position of the three turntables 29 . When the lock 35 is activated, the output end of the electromagnetic lock 35 will be inserted into the limit port 36, and the electromagnetic lock 35 will lock the turntable 29 to avoid accidental touches. The same turntable 29 is provided with two limit ports 36 corresponding to Both states of the switch assembly 5 can lock the turntable 29 .

Claims (8)

1. A high-voltage frequency conversion manual bypass cabinet with self-locking effect, comprising a cabinet body (1) and three SPDT switches (2) installed in the interior of the cabinet body (1) in an up-down arrangement, characterized in that all A front plate (3) is fixedly connected to the front end surface of the cabinet body (1), a cavity (4) is opened inside the front plate (3), and a switch assembly (5) is arranged inside the cavity (4), The switch assembly (5) passes through the cavity (4), and the output end of the switch assembly (5) is fixedly connected to the input end of the SPDT switch (2). A connecting rod (6) at the bottom of the switch assembly (5), a locking assembly (7) is inserted through the connecting rod (6), the input end of the locking assembly (7) passes through the cavity (4), the One end of the locking assembly (7) is inserted and matched with the switch assembly (5), and an insertion rod (8) located at the bottom of the locking assembly (7) is slidably arranged inside the cavity (4), and the insertion rod (8) is provided with an opening There are several notches (9), the notches (9) are inserted and matched with the other end of the locking assembly (7), the bottom surface of the insertion rod (8) is fixedly connected with a gear rack (10), the insertion rod One side of (8) is rotatably provided with a circular plate (11), the side surface of the circular plate (11) is fixedly connected with a toothed ring (12) that meshes with the rack one (10), the connecting rod (6) ) is vertically provided with a through hole (13) on the bottom surface, a locking rod (21) (14) is arranged inside the through hole (13), and a wedge-shaped block (15) is slid laterally at the bottom of the insertion rod (8), Two racks (16) are fixedly connected to one side of the wedge-shaped block (15), and a rotating rod (17) is arranged symmetrically and rotatably inside the front plate (3). There is a sealing door (18) fixedly connected with the two rotating rods (17) in between, and one end of the rotating rod (17) close to the second rack (16) is fixedly connected with a meshing door with the second rack (16). In the gear (19), the side of the sealing door (18) close to the insertion rod (8) is provided with a socket (20) corresponding to the insertion rod (8). 2. A high-voltage variable frequency manual bypass cabinet with self-locking effect according to claim 1, wherein the locking assembly (7) comprises a locking rod (21) (14), a push rod (22), A side plate (23), a spring (24), a sliding rod (25) and a locking ball (26), three locking rods (21) (14) are provided, and three locking rods (21) (14) Passing through the connecting rod (6) in turn, the cavity (4) is provided with a chute (27) corresponding to the connecting rod (6), the push rod (22) is slidably arranged inside the chute (27), and all the One end of the push rod (22) is fixedly connected to the side surface of the locking rod (21) (14), the side plate (23) is located on one side of the locking rod (21) (14), and the side plate (23) It is fixedly connected with the connecting rod (6), the sliding rod (25) is located between the side plate (23) and the locking rod (21) (14), and one end of the sliding rod (25) is connected to the locking rod (21) ( 14) Fixed connection, the spring one (24) is sleeved on the sliding rod (25), the clamping ball (26) is slidably arranged on the sliding rod (25), and the two ends of the spring one (24) are respectively The clamping ball (26) is in contact with the locking rod (21) (14), and the side plate (23) is provided with two bayonet openings (28) from top to bottom for matching with the clamping ball (26). 3. The high-voltage variable frequency manual bypass cabinet with self-locking effect according to claim 1, wherein the switch assembly (5) comprises a turntable (29) and a pull rod (30), and the front plate ( 3) Three turning slots (31) are provided on the upper surface, three of the turntables (29) are provided and are respectively rotated and arranged in the corresponding turning slots (31), and the side surfaces of the turntable (29) are provided with arc-shaped slots ( 32), one end of the pull rod (30) is rotatably arranged inside the arc groove (32), one end of the pull rod (30) is rotatably connected with a pull sleeve (33), and one end of the pull sleeve (33) is sleeved It is arranged on the output end of the SPDT switch (2), the circular arc surface of the turntable (29) is provided with a locking opening (34) which cooperates with the locking assembly (7), and the locking opening (34) is located in the turning plate (29). one end of the slot (31). 4. The high-voltage variable frequency manual bypass cabinet with self-locking effect according to claim 3, wherein three electromagnetic locks (35) are fixedly connected to the end face of the front plate (3), and the three turntables are The side surface of (29) is provided with two limit openings (36), and the output ends of the three electromagnetic locks (35) correspond to the limit openings (36) at the same position of the three turntables (29). 5. A high-voltage frequency conversion manual bypass cabinet with self-locking effect according to claim 3, wherein a threaded port (37) is provided on the arc surface of the turntable (29), wherein one of the A switch rod (38) is provided in the threaded port (37) with internal thread matching. 6. A high-voltage variable frequency manual bypass cabinet with self-locking effect according to claim 1, wherein an arc-shaped plate (39) is provided on the side of the circular plate (11), and the arc-shaped plate (39) A sleeve (40) is fixedly connected to one side, a push rod (41) is slidably arranged inside the sleeve (40), and a spring II is arranged between the sleeve (40) and the push rod (41). (42), the two ends of the second spring (42) are respectively fixedly connected to the side surfaces of the sleeve (40) and the ejector rod (41), and one end of the ejector rod (41) is fixedly connected with a hemisphere (43), The side surface of the disc is provided with two clamping grooves (44) which are clamped with the hemisphere (43). 7. The high-voltage frequency conversion manual bypass cabinet with self-locking effect according to claim 1, characterized in that, the side surface of the circular plate (11) is fixedly connected with a telescopic rod ( 45). 8 . The high-voltage variable frequency manual bypass cabinet with self-locking effect according to claim 1 , wherein the bottom of the locking rod ( 21 ) ( 14 ) is provided with an oblique opening ( 46 ). 9 .

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