Low-voltage switch cabinet

Abstract

The invention relates to the field of switch cabinets, in particular to a low-voltage switch cabinet which comprises a cabinet body, a connecting cavity is formed in the cabinet body, a conductive insertion strip is fixedly connected to the inner top face of the rear side of the connecting cavity, a drawing cabinet is movably inserted into the connecting cavity, and limiting blocks are symmetrically and fixedly connected to the rear side of the drawing cabinet. A limiting groove is formed in the side wall of the limiting block, a limiting strip is rotationally connected into the limiting groove, and a locking mechanism matched with the limiting strip is movably connected between the inner wall of the connecting cavity and the conductive insertion strip. The low-voltage switch cabinet is composed of a locking mechanism and an unlocking mechanism. When the pressing rod is pushed to release the limiting state of the limiting rod and the limiting strip, the limiting rod drives the U-shaped hinge plate and the hinge block to move in a matched mode, the hinge block drives the control end of the vacuum circuit breaker to swing to cut off power, the situation that the vacuum circuit breaker is powered off in a drawing and inserting disconnection mode is avoided, friction loss is reduced, and the service life of the vacuum circuit breaker is prolonged.

Description

Technical Field

[0001] The invention relates to the field of switch cabinets, in particular to a low-voltage switch cabinet. Background Art

[0002] As a unitized switching electrical device, low-voltage switchgear is widely used in power plants, chemical industry and other fields. By combining the switching electrical equipment into functional units through low-voltage switchgear, protection, conversion and control operations can be effectively performed in groups.

[0003] The existing patent (publication number: CN111900659B) discloses a low-voltage withdrawable switch cabinet, including a cabinet, the cabinet including a control panel, a plurality of drawer units and a warning light, and the control panel is arranged on a side wall of the cabinet facing the user. In the process of implementing the scheme, the invention finds that the following problems in the prior art have not been well solved: 1. During the use of the low-voltage withdrawable switch cabinet, it is necessary to drive the conductive rod to move through the triangular guide rod to cut off the connection of the vacuum circuit breaker. Since the movable conductive rod is reciprocated in the vacuum circuit breaker for a long time to realize the circuit on and off, and the triangular guide rod also forms friction with the triangular block during the reciprocating movement process, the failure rate of the vacuum circuit breaker position is increased at this time, and the existing vacuum circuit breaker generally realizes the circuit on and off through the dial block switch, the above situation affects the service life of the vacuum circuit breaker of the low-voltage withdrawable switch cabinet; 2. During the long-term use of the low-voltage withdrawable switch cabinet, there is serious wear between the triangular guide rod, the triangular block and the triangular clamp rod, thereby affecting the use effect of the low-voltage withdrawable switch cabinet. Summary of the invention

[0004] The purpose of the present invention is to provide a low-voltage switch cabinet to solve the problems raised in the above-mentioned background technology: 1. The service life of the vacuum circuit breaker is affected during the use of some existing low-voltage withdrawable switch cabinets; 2. During the use of some existing low-voltage withdrawable switch cabinets, the internal engaging parts are seriously rubbed during use, which affects the service life. In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: A low-voltage switch cabinet, including a cabinet body, a connecting chamber is provided inside the cabinet body, a conductive strip is fixedly connected to the inner top surface of the rear side of the connecting chamber, a pull-out cabinet is movably inserted inside the connecting chamber, a limiting block is symmetrically fixedly connected to the rear side of the pull-out cabinet, a limiting groove is provided on the side wall of the limiting block, the limiting strip is rotatably connected inside the limiting groove, and a locking mechanism that cooperates with the limiting strip is movably connected between the inner wall of the connecting chamber and the conductive strip;

[0005] A releasing mechanism matched with the locking mechanism is movably connected between the inner wall of the connecting chamber and the surface of the limiting strip.

[0006] Preferably, the locking mechanism comprises a support rod, the support rod is fixedly connected to the middle position of the rear side of the connecting chamber, one end of the support rod is fixedly connected to a sliding rod, both ends of the sliding rod are slidably connected to limit rods, the two limit rods correspond to the two limit strips one by one, one end of the limit rod overlaps the surface of the corresponding limit strip, and a compression spring is fixedly connected between the other end of the limit rod and the surface of the sliding rod;

[0007] The middle part of the support rod is slidably connected with an isolating switch, one side of the isolating switch is engaged with the conductive plug strip, a reset spring is fixedly connected between the surface of the isolating switch and the inner wall of the connecting chamber, the other side of the isolating switch is fixedly connected with a slide plate, the middle part of the slide plate is slidably connected to the surface of the limit rod, one end of the slide plate away from the isolating switch is fixedly connected with a connecting plug, and a connecting slot matching with the connecting plug is provided on the rear side of the pull-out cabinet;

[0008] The inner wall of the connection chamber is symmetrically fixedly connected with vacuum circuit breakers, the two vacuum circuit breakers correspond to the two conductive inserts one by one, and the control end of the vacuum circuit breaker is fixedly connected with a hinge block;

[0009] The surfaces of the two limit rods are fixedly connected with U-shaped hinge plates, the two U-shaped hinge plates correspond to the two hinge blocks one by one, and one end of the hinge block is hingedly installed with the middle part of the adjacent U-shaped hinge plate;

[0010] The bottom of the opposite side of the two limit rods is fixedly connected with a connecting rod, the lower part of the connecting rod is hinged with a connecting strip, a connecting block is hinged between the two connecting strips, a connecting groove matching the connecting chamber is provided on the front side of the cabinet, a pressing rod is slidably connected inside the connecting groove, and one end of the pressing rod is fixedly connected to the bottom of the connecting block.

[0011] Preferably, a conductive metal sheet is fixedly connected to the inner wall of the connection slot, and the surface of the connection plug overlaps the surface of the conductive metal sheet.

[0012] Preferably, the vacuum circuit breaker is electrically connected to the interior of the cabinet, and the control ends of the two vacuum circuit breakers are arranged in opposite directions.

[0013] Preferably, the release mechanism comprises a slide groove, and the slide groove is provided with two slide grooves, and the two slide grooves are symmetrically opened on the inner bottom surface of the connection chamber, and the two slide grooves correspond to the two limit bars one by one, and a slider is slidably connected inside the slide groove, and a wedge block matched with the locking mechanism is fixedly connected to the top of the slider, and a wedge groove is opened in the middle of the limit bar, and one end of the wedge block is movably inserted into the corresponding wedge groove;

[0014] A pull rope is fixedly connected to the lower part of the sliding block, and two pull ropes extend to the front end of the cabinet and are fixedly connected to a pull rod.

[0015] Preferably, a compression spring is fixedly connected between the side wall of the sliding block and the inner wall of the corresponding sliding groove;

[0016] A through hole matching the slide groove is provided at the front end of the cabinet, and the pull rope is movably inserted into the through hole.

[0017] Preferably, one end of the limiting rod close to the limiting strip is fixedly connected to a limiting ball, and the width of the wedge-shaped groove is set to 0.5 times the diameter of the limiting ball.

[0018] Preferably, a rotating rod is fixedly connected between the two sides of the inner wall of the limiting groove, the limiting bar is rotatably connected to the middle of the rotating rod, a torsion spring is fixedly connected between the side wall of the limiting bar and the inner wall of the limiting groove, and the limiting groove is configured as an oblique groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, through the coordinated use of components such as the support rod, the U-shaped hinge plate and the hinge block, when the pressing rod is pushed to release the limiting state of the limiting rod and the limiting strip, the limiting rod moves with the U-shaped hinge plate and the hinge block, and the hinge block swings with the control end of the vacuum circuit breaker to cut off the power, avoiding the use of a plug-in disconnection method to cut off the power to the vacuum circuit breaker position, reducing friction loss, and increasing the service life of the vacuum circuit breaker.

[0021] In the present invention, through the coordinated use of components such as the limit block, the limit strip and the limit rod, when the pull-out cabinet is inserted into the connecting chamber and the side wall of the limit strip contacts the end of the limit rod, the limit strip flips toward the inside of the limit groove of the side wall of the limit block, thereby reducing the friction loss between the limit strip and the end of the limit rod during the installation of the pull-out cabinet, thereby increasing the service life of the limit components of the switch cabinet and improving the use effect.

[0022] In the present invention, through the coordinated use of components such as the pull-out cabinet, the limit bar and the release mechanism, when the locking mechanism fails and the limit rod cannot effectively release the overlap limit with the limit bar, by pulling the pull rope of the release mechanism, the vacuum circuit breaker and the isolating switch can be quickly powered off, and the locking state of the pull-out cabinet can be released, thereby improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a side view of the cabinet body and the pull-out cabinet of the present invention;

[0024] Figure 2 It is a side sectional view of a local position of the cabinet and the connecting chamber of the present invention;

[0025] Figure 3It is a top-sectional view of the local position of the connection chamber and the isolating switch of the present invention;

[0026] Figure 4 It is a side sectional view of a local position of the cabinet and the connecting groove of the present invention;

[0027] Figure 5 It is a side cross-sectional view of the local position of the limit block and the limit strip of the present invention;

[0028] Figure 6 It is a side sectional view of the local position of the limiting rod and the sliding rod of the present invention.

[0029] In the figure: 1. cabinet; 2. connecting chamber; 3. conductive plug strip; 4. pull-out cabinet; 5. limit block; 6. limit slot; 7. limit strip; 8. locking mechanism; 801. support rod; 802. slide rod; 803. limit rod; 804. compression spring; 805. isolating switch; 806. reset spring; 807. slide plate; 808. connecting plug; 809. connecting slot; 810. vacuum circuit breaker; 811. hinge block; 812. U-shaped hinge plate; 813. connecting rod; 814. connecting strip; 815. connecting block; 816. connecting slot; 817. pressing rod; 9. release mechanism; 901. slide slot; 902. slide block; 903. wedge block; 904. wedge slot; 905. pull rope; 906. pull rod. DETAILED DESCRIPTION

[0030] 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 technical personnel in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 6 The present invention provides a technical solution: a low-voltage switch cabinet, including a cabinet body 1, a connecting chamber 2 is opened inside the cabinet body 1, a conductive plug strip 3 is fixedly connected to the inner top surface of the rear side of the connecting chamber 2, a pull-out cabinet 4 is movably inserted inside the connecting chamber 2, a limiting block 5 is symmetrically fixedly connected to the rear side of the pull-out cabinet 4, a limiting groove 6 is opened on the side wall of the limiting block 5, a limiting strip 7 is rotatably connected inside the limiting groove 6, and a locking mechanism 8 matched with the limiting strip 7 is movably connected between the inner wall of the connecting chamber 2 and the conductive plug strip 3.

[0032] A release mechanism 9 that cooperates with the locking mechanism 8 is movably connected between the inner wall of the connecting chamber 2 and the surface of the limiting strip 7. It should be noted that when the locking mechanism 8 fails, the pull-out cabinet 4 can be quickly removed from the inside of the connecting chamber 2 through the release mechanism 9 and the power is cut off.

[0033] In this embodiment, Figures 1 to 6 As shown, the locking mechanism 8 includes a support rod 801, which is fixedly connected to the middle position of the rear side of the connecting chamber 2, one end of the support rod 801 is fixedly connected to a slide rod 802, both ends of the slide rod 802 are slidably connected to limit rods 803, the two limit rods 803 correspond to the two limit bars 7 one by one, one end of the limit rod 803 overlaps the surface of the corresponding limit bar 7, and the other end of the limit rod 803 is fixedly connected to the surface of the slide rod 802 with a compression spring 804. It should be noted that: the opposite ends of the two limit rods 803 are provided with a socket, and the limit rod 803 is movably plugged into the end position of the support rod 801 through the socket.

[0034] An isolating switch 805 is slidably connected to the middle part of the support rod 801, one side of the isolating switch 805 is engaged with the conductive plug strip 3, a reset spring 806 is fixedly connected between the surface of the isolating switch 805 and the inner wall of the connecting chamber 2, and a slide plate 807 is fixedly connected to the other side of the isolating switch 805, the middle part of the slide plate 807 is slidably connected to the surface of the limit rod 803, and a connecting plug 808 is fixedly connected to the end of the slide plate 807 away from the isolating switch 805, and a connecting slot 809 matching the connecting plug 808 is provided on the rear side of the pull-out cabinet 4. It should be noted that: the two return springs 806 are respectively arranged on both sides of the rear end of the isolating switch 805, and a metal connecting piece is symmetrically arranged in the middle position behind the isolating switch 805. When the conductive strip 3 is inserted into the middle position of the metal connecting piece, the isolating switch 805 is in a power-on state, and the power is transmitted to the connection slot 809 of the pull-out cabinet 4 through the slide plate 807 and the connecting plug 808; a waist-shaped groove is opened in the middle of the slide plate 807, and the slide plate 807 is slidably connected to the surface of the limit rod 803 through the waist-shaped groove, so as to avoid the limit rod 803 from interfering with the movement of the slide plate 807 and the isolating switch 805.

[0035] The inner wall of the connection chamber 2 is symmetrically fixedly connected with vacuum circuit breakers 810, and the two vacuum circuit breakers 810 correspond to the two conductive plugs 3 one by one. The control end of the vacuum circuit breaker 810 is fixedly connected with a hinge block 811. It should be noted that the two conductive plugs 3 are electrically connected to the two vacuum circuit breakers 810 respectively, and the two vacuum circuit breakers 810 form a loop through the conductive plugs 3 and the isolating switch 805.

[0036] The surfaces of the two limit rods 803 are fixedly connected with U-shaped hinge plates 812, and the two U-shaped hinge plates 812 correspond to the two hinge blocks 811 one by one, and one end of the hinge block 811 is hingedly installed with the middle part of the adjacent U-shaped hinge plate 812. It should be noted that when the limit rod 803 slides on the surface of the slide rod 802, the limit rod 803 pulls the hinged hinge block 811 to swing left and right through the U-shaped hinge plate 812, so that the hinge block 811 swings left and right with the opening of the vacuum circuit breaker 810, thereby realizing the power-on and power-off operation.

[0037] The bottom of the opposite side of the two limit rods 803 is fixedly connected with a connecting rod 813, the lower part of the connecting rod 813 is hinged with a connecting strip 814, and a connecting block 815 is hinged between the two connecting strips 814. A connecting groove 816 matching the connecting chamber 2 is provided on the front side of the cabinet 1, and a pressing rod 817 is slidably connected inside the connecting groove 816, and one end of the pressing rod 817 is fixedly connected to the bottom of the connecting block 815. It should be noted that: when the pressing rod 817 is pushed, the pressing rod 817 pulls the two connecting strips 814 to move synchronously relative to one end through the connecting block 815. At this time, the other end of the connecting strip 814 pulls the limiting rod 803 to slide on the surface of the sliding rod 802, so that the two limiting rods 803 move relative to each other to release the overlap with the limiting strip 7; the front end of the inner wall of the connecting groove 816 is provided with an internal thread that matches the pressing rod 817. When the pressing rod 817 is pressed to the limit position, the pressing rod 817 is rotated to be threadedly connected to the internal thread, so that the pressing rod 817 is in the current position, ensuring the stability of the pressing rod 817 after it is pushed and moved, and a rotating bearing is fixedly connected to the end of the pressing rod 817 close to the connecting block 815 to avoid interference caused by the connecting block 815 rotating when the pressing rod 817 rotates.

[0038] In this embodiment, Figures 1 to 6 As shown, a conductive metal sheet is fixedly connected to the inner wall of the connection slot 809, and the surface of the connection plug 808 overlaps the surface of the conductive metal sheet. It should be noted that the port position of the connection slot 809 is set to be conical to facilitate the insertion of the connection plug 808 into the connection slot 809.

[0039] In this embodiment, Figures 1 to 6 As shown, the vacuum circuit breaker 810 is electrically connected to the interior of the cabinet 1, and the control ends of the two vacuum circuit breakers 810 are arranged in opposite directions. It should be noted that by arranging the two vacuum circuit breakers 810 in opposite directions, when the two limit rods 803 move relative to each other, the two vacuum circuit breakers 810 can be in the disconnected state. Here, the vacuum circuit breaker 810 is a prior art and will not be described in detail.

[0040] In this embodiment, Figures 1 to 6As shown, the release mechanism 9 includes a slide groove 901, and the slide groove 901 is set to two. The two slide grooves 901 are symmetrically opened on the inner bottom surface of the connecting chamber 2. The two slide grooves 901 correspond to the two limit bars 7 one by one. The slide groove 901 is slidably connected to the inside of the slide groove 901. The top of the slide 902 is fixedly connected to a wedge block 903 that matches the locking mechanism 8. The middle part of the limit bar 7 is provided with a wedge groove 904, and one end of the wedge block 903 is movably inserted into the inside of the corresponding wedge groove 904. It should be noted that: when the wedge block 903 extends from the inside of the wedge groove 904, the side wall of the wedge block 903 contacts the end of the corresponding limit rod 803. At this time, the end of the limit rod 803 is pressed and slides on the surface of the slide rod 802, so that the limit rod 803 is released from the overlap between the limit bar 7.

[0041] A pull rope 905 is fixedly connected to the lower portion of the sliding block 902 , and two pull ropes 905 extend to the front end of the cabinet 1 and are fixedly connected to a pull rod 906 .

[0042] In this embodiment, Figures 1 to 6 As shown, a compression spring is fixedly connected between the side wall of the slider 902 and the inner wall of the corresponding slide groove 901. It should be noted that a positioning rod is movably inserted in the middle of the slider 902, one end of which is fixedly connected to the inner wall of the connecting chamber 2, and the positioning rod is set to enhance the stability of the slider 902 and the wedge block 903 during movement.

[0043] A through hole matching the slide groove 901 is formed at the front end of the cabinet 1, and the pull rope 905 is movably inserted into the inside of the through hole.

[0044] In this embodiment, Figures 1 to 6 As shown, the limiting rod 803 is fixedly connected to the limiting ball at one end close to the limiting bar 7, and the width of the wedge-shaped groove 904 is set to 0.5 times the diameter of the limiting ball. It should be noted that when the limiting rod 803 is in use, the limiting ball will not be stuck in the wedge-shaped groove 904, and the wedge block 903 can slide on the surface of the slide bar 802 by pressing the limiting rod 803 against the surface of the limiting ball through the inclined surface of the wedge block 903 and the surface of the limiting ball.

[0045] In this embodiment, Figures 1 to 6 As shown, a rotating rod is fixedly connected between the two sides of the inner wall of the limit groove 6, the limit strip 7 is rotatably connected to the middle part of the rotating rod, a torsion spring is fixedly connected between the side wall of the limit strip 7 and the inner wall of the limit groove 6, and the limit groove 6 is set as an inclined groove. It should be noted that when the limit strip 7 is not compressed, under the action of the torsion spring, the side wall of the limit strip 7 overlaps the inclined surface position of the inner wall of the limit groove 6, and when the limit block 5 is inserted into the connection chamber 2 with the limit strip 7, the side wall of the limit strip 7 contacts the end of the limit rod 803, and the limit strip 7 can be turned toward the inside of the limit groove 6 to avoid severe friction between the side wall of the limit strip 7 and the end of the limit rod 803 when the drawer cabinet 4 is installed.

[0046] The use method and advantages of the present invention: The working process of the low-voltage switch cabinet is as follows:

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, when in use, by pressing the pressing rod 817 at the front end of the cabinet 1, the pressing rod 817 moves horizontally with the connecting block 815 inside the connecting chamber 2. At this time, the two connecting bars 814 on the connecting block 815 pull the two connecting rods 813 to move relative to each other, so that the two connecting rods 813 move relative to each other with the two limiting rods 803. At this time, the limiting rods 803 are released from the overlap with the limiting bars 7. In this process, as the limiting rod 803 moves toward the middle of the sliding rod 802, the U-shaped hinged plate 812 on the surface of the limiting rod 803 moves with the end of the hinged hinge block 811, so that the hinge block 811 swings with the control end of the vacuum circuit breaker 810 and disconnects the electrical connection state;

[0048] Then, the return spring 806 elastically recovers and moves the isolating switch 805 toward the front end of the cabinet 1, so that the end of the isolating switch 805 and the connecting plug 808 are electrically disconnected. At the same time, the isolating switch 805 presses the front end of the drawer cabinet 4 through the slide plate 807 and the connecting plug 808 to move the drawer cabinet 4 forward. During the forward movement of the drawer cabinet 4, the limit bar 7 at the position of the limit block 5 leaves the end position of the limit rod 803. At this time, the drawer cabinet 4 can be drawn out. In this process, the circuit can be disconnected by moving the hinge block 811 on the vacuum circuit breaker 810, avoiding wear caused by long-term use of the plug-in connection method and affecting the service life.

[0049] When the drawer cabinet 4 needs to be installed, the drawer cabinet 4 is inserted into the connecting chamber 2, so that the side wall of the limit strip 7 on the limit block 5 at the rear end of the drawer cabinet 4 overlaps with the end of the limit rod 803. At this time, the side wall of the limit strip 7 is pressed and turned toward the inside of the limit groove 6, reducing the friction between the surface of the limit strip 7 and the end of the limit rod 803, thereby increasing the service life of the limit strip 7;

[0050] When the limit strip 7 passes over the end position of the limit rod 803, the limit strip 7 is flipped and reset under the action of the torsion spring, and then the drawer cabinet 4 is released. At this time, the reset spring 806 presses the isolating switch 805 to move the drawer cabinet 4, so that the reset limit strip 7 surface presses against the end position of the limit rod 803 for self-locking. In this process, the isolating switch 805 is stuck in the end position of the connecting plug 808, and the pressing rod 817 is reset at the same time, completing the power-on state;

[0051] When a fault occurs during the cooperation between the slide bar 802 and the limit rod 803, the limit rod 803 cannot move normally and release the limit state with the limit strip 7, the two pull ropes 905 are pulled to move the slide bar 902 inside the slide groove 901, so that the wedge block 903 on the upper part of the slide bar 902 passes through the wedge groove 904 and presses on the end of the limit rod 803, so that the limit rod 803 moves to the middle position of the slide bar 802 to release the overlap with the limit strip 7. At this time, the reset spring 806 can move the isolating switch 805 and cut off the power, avoiding the inability to effectively cut off the power when the locking mechanism 8 is in a fault state.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low voltage switch cabinet, comprising a cabinet body (1), characterized in that: The cabinet body (1) is provided with a connection chamber (2) inside, a conductive plug strip (3) is fixedly connected to the inner top surface of the rear side of the connection chamber (2), a drawer cabinet (4) is movably connected inside the connection chamber (2), a limit block (5) is symmetrically fixedly connected to the rear side of the drawer cabinet (4), a limit groove (6) is provided on the side wall of the limit block (5), a limit strip (7) is rotatably connected inside the limit groove (6), and a locking mechanism (8) that cooperates with the limit strip (7) is movably connected between the inner wall of the connection chamber (2) and the conductive plug strip (3); A release mechanism (9) that cooperates with the locking mechanism (8) is movably connected between the inner wall of the connection chamber (2) and the surface of the limit strip (7).

2. A low voltage switch cabinet according to claim 1, characterized in that: The locking mechanism (8) comprises a support rod (801), wherein the support rod (801) is fixedly connected to the middle position of the rear side of the connecting chamber (2), one end of the support rod (801) is fixedly connected to a sliding rod (802), both ends of the sliding rod (802) are slidably connected to limit rods (803), the two limit rods (803) correspond to the two limit strips (7) one by one, one end of the limit rod (803) overlaps the surface of the corresponding limit strip (7), and a compression spring (804) is fixedly connected between the other end of the limit rod (803) and the surface of the sliding rod (802); The middle part of the support rod (801) is slidably connected to an isolating switch (805), one side of the isolating switch (805) is engaged with the conductive plug strip (3), a return spring (806) is fixedly connected between the surface of the isolating switch (805) and the inner wall of the connecting chamber (2), the other side of the isolating switch (805) is fixedly connected to a slide plate (807), the middle part of the slide plate (807) is slidably connected to the surface of the limit rod (803), one end of the slide plate (807) away from the isolating switch (805) is fixedly connected to a connecting plug (808), and a connecting slot (809) matching with the connecting plug (808) is provided on the rear side of the drawer cabinet (4); The inner wall of the connection chamber (2) is symmetrically and fixedly connected with vacuum circuit breakers (810), the two vacuum circuit breakers (810) correspond one to one with the two conductive plug strips (3), and the control end of the vacuum circuit breaker (810) is fixedly connected with a hinge block (811); The surfaces of the two limit rods (803) are fixedly connected with U-shaped hinge plates (812), the two U-shaped hinge plates (812) correspond to the two hinge blocks (811) one by one, and one end of the hinge block (811) is hingedly installed with the middle part of the adjacent U-shaped hinge plate (812); The bottom of the two limiting rods (803) on the opposite side are fixedly connected to a connecting rod (813), the lower part of the connecting rod (813) is hinged with a connecting strip (814), a connecting block (815) is hinged between the two connecting strips (814), a connecting groove (816) matching with the connecting chamber (2) is provided on the front side of the cabinet (1), a pressing rod (817) is slidably connected inside the connecting groove (816), and one end of the pressing rod (817) is fixedly connected to the bottom of the connecting block (815).

3. A low voltage switch cabinet according to claim 2, characterized in that: A conductive metal sheet is fixedly connected to the inner wall of the connection slot (809), and the surface of the connection plug (808) overlaps the surface of the conductive metal sheet.

4. A low voltage switch cabinet according to claim 3, characterized in that: The vacuum circuit breaker (810) is electrically connected to the interior of the cabinet (1), and the control ends of the two vacuum circuit breakers (810) are arranged in opposite directions.

5. A low voltage switch cabinet according to claim 4, characterized in that: The release mechanism (9) comprises a slide groove (901), wherein the slide groove (901) is provided with two slide grooves (901), the two slide grooves (901) are symmetrically arranged on the inner bottom surface of the connection chamber (2), the two slide grooves (901) correspond to the two limit bars (7) one by one, the interior of the slide groove (901) is slidably connected with a slider (902), the top of the slider (902) is fixedly connected with a wedge block (903) matched with the locking mechanism (8), the middle part of the limit bar (7) is provided with a wedge groove (904), and one end of the wedge block (903) is movably inserted into the interior of the corresponding wedge groove (904); A pull rope (905) is fixedly connected to the lower part of the sliding block (902), and the two pull ropes (905) extend to the front end of the cabinet (1) and are fixedly connected to a pull rod (906).

6. A low voltage switch cabinet according to claim 5, characterized in that: A compression spring is fixedly connected between the side wall of the sliding block (902) and the inner wall of the corresponding sliding groove (901); The front end of the cabinet (1) is provided with a through hole that matches the slide groove (901), and the pull rope (905) is movably inserted into the inside of the through hole.

7. A low voltage switch cabinet according to claim 6, characterized in that: One end of the limiting rod (803) close to the limiting strip (7) is fixedly connected to a limiting ball, and the width of the wedge-shaped groove (904) is set to 0.5 times the diameter of the limiting ball.

8. A low voltage switch cabinet according to claim 7, characterized in that: A rotating rod is fixedly connected between the two sides of the inner wall of the limiting groove (6); the limiting strip (7) is rotatably connected to the middle of the rotating rod; a torsion spring is fixedly connected between the side wall of the limiting strip (7) and the inner wall of the limiting groove (6); and the limiting groove (6) is configured as an oblique groove.

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