38KV intelligent load switch

Abstract

The utility model discloses a 38KV intelligent load switch, and relates to the technical field of electrical switches. The device comprises a movable shell, a push plate, a power connection shell and a conductive block, the push plate is movably connected in the movable shell, a rotating rod is rotatably connected to the center of one side of the push plate, the rotating rod is movably connected to one end of the movable shell in a penetrating mode, a damping sleeve is fixed to the end face of the movable shell on the outer side of the rotating rod, and the rotating rod is sleeved with the damping sleeve. A ventilation pipe is fixed to the center of the side, away from the rotating rod, of the pushing plate, a power connection shell is fixed to the end, away from the damping sleeve, of the movable shell, a conductive block is arranged in the power connection shell, and an insulation insertion rod is fixed to the end, away from the movable shell, of the conductive block. By arranging the movable shell, the push plate, the power connection shell and the conductive block, the problems that the load switch can only blow air through an air source, the flow of the air source is possibly not high enough, the arc extinguishing effect is influenced, an additional auxiliary switching-on structure can only be used for assisting switching-on in the switching-on process, the danger is reduced, and the use is inconvenient are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical switches, in particular to a 38KV intelligent load switch. Background Art

[0002] Load switches are generally equipped with simple arc extinguishing devices, but their structure is relatively simple. Load switches are mainly used to open and close load currents. Load switches can also be used in conjunction with high-voltage fuses to replace circuit breakers. Since load switches are easy to use and reasonably priced, they are widely used in distribution networks below 50kV. Reasonable selection of load switches in design is of great significance to ensuring the safe and reliable operation of power grids. They can be well coordinated with power-on and power-off operations for 38KV circuits, but they still have the following disadvantages in actual use:

[0003] The load switch will generate an arc when switching on and off the power, so the load switch extinguishes the arc by blowing air to reduce the damage of the arc to the conductor in the switch. However, the air blowing is done through an external gas source. When the gas content in the gas source decreases, the air flow rate of the blowing is not high enough, which affects the arc extinguishing effect.

[0004] During the closing process of the load switch, an arc will be generated due to tip discharge, causing electric shock to the operator and creating a safety hazard. The only way to reduce the danger is to use an external auxiliary closing structure to assist in closing (such as pushing with an insulating long rod, etc.). The structure needs to be aligned with the closing structure, which is inconvenient to use. Utility Model Content

[0005] The purpose of the utility model is to provide a 38KV intelligent load switch. By arranging a movable shell, a push plate, a power connection shell and a conductive block, the problem that the load switch can only be blown by an air source, the air source flow rate may not be high enough to affect the arc extinguishing effect, and the problem that the switch can only be closed by an external auxiliary closing structure to reduce the danger and inconvenience in use is solved.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a 38KV intelligent load switch, comprising a movable shell, a push plate, an electricity connection shell and a conductive block, wherein the movable shell is movably connected with the push plate, and the central part of one side of the push plate is rotatably connected with a rotating rod, the rotating rod is movably connected to one end of the movable shell through the push plate, a damping sleeve is fixed on the end surface of the movable shell outside the rotating rod, the rotating rod is sleeved in the damping sleeve, a vent pipe is fixed at the central part of the side of the push plate away from the rotating rod, the vent pipe is inserted through the movable shell away from the rotating rod and extends out of the movable shell, the electricity connection shell is fixed at the end of the movable shell away from the damping sleeve, a conductive block is arranged in the electricity connection shell, an insulating plug rod is fixed at the end of the conductive block away from the movable shell, the insulating plug rod is inserted through the push plate on the side of the electricity connection shell away from the movable shell, when working, the push plate is movably connected therein through the movable shell, the rotating rod is pushed by the handle, the push plate is driven to be pushed, so that after the air in the movable shell is compressed, the conductive block is pushed in the electricity connection shell through the vent pipe, so that the electricity connection between the electricity connection blocks is disconnected, and the power-off operation is performed.

[0008] Furthermore, a vent hole 1 is formed through the end of the movable shell above the damping sleeve, an L-shaped limit frame is fixed on the end surface of the movable shell below the damping sleeve, and the space between the inner wall of the movable shell close to the damping sleeve and the push plate is ventilated through the vent hole 1.

[0009] Furthermore, a movable block is fixed to the inner top of the movable shell, a one-way air inlet pipe is fixed through the end of the movable shell above the ventilation pipe, and the movable shell is movably connected to the ventilation pipe through the movable block. When negative pressure is created in the movable shell, the air in the power connection shell is drawn into the movable shell through the one-way air inlet pipe.

[0010] Furthermore, a handle is fixed to one end of the rotating rod away from the pushing plate, and compression springs are fixed to the four corners of the pushing plate outside the ventilation pipe. The end of the compression spring away from the pushing plate is fixed to the inner wall of the movable shell. The rotating rod provides a holding effect during pushing through the handle, and after the handle is released, the elastic force of the compression spring restores the movement of the pushing plate.

[0011] Furthermore, the ventilation pipe is inserted through the movable block, and air inlet holes are symmetrically opened around the ventilation pipe in the movable block. Jet holes are symmetrically opened around the end of the ventilation pipe on the outside of the movable shell. The ventilation pipe inputs the required air in the movable shell through the air inlet holes and sprays it out through the jet holes to extinguish the arc between the butt block and the conductive block.

[0012] Furthermore, a power connection block is symmetrically fixed through the power connection shell along the central axis of the conductive block, the conductive blocks are in contact with two power connection blocks respectively, a power connection sheet is fixed at one end of the two power connection blocks away from each other, and a vent hole 2 is opened through the upper part of the power connection shell away from the movable shell, the power connection shell cooperates with the conductive block through the power connection block to conduct electricity, and the circuit is switched by the separation and combination of the power connection block and the conductive block.

[0013] Furthermore, a fixing disk is fixed to the end of the insulating rod away from the conductive block, a spring is fixed to the outside of the insulating rod at one end of the fixing disk close to the power connection shell, and the end of the spring away from the fixing disk is fixed to a side of the power connection shell away from the movable shell. The insulating rod is connected to the spring through the fixing disk, and the spring is pushed to release after the conductive block is pushed.

[0014] The utility model has the following beneficial effects:

[0015] The utility model solves the problem that the load switch can only be blown by an air source and the air source flow rate may not be high enough, which will affect the arc extinguishing effect by arranging a movable shell and a push plate. When the power is off, the handle is held and the rotating rod is pushed to drive the push plate to move in the movable shell, and the compression spring is compressed. At the same time, the air in the movable shell is initially compressed until the handle moves into the L-shaped limit frame. At this time, the vent pipe pushes the conductive block to leave the power connection block, and at the same time, the air inlet hole on the vent pipe is exposed in the movable shell. The air compressed by the push plate in the movable shell enters through the air inlet hole on the vent pipe and is ejected through the air jet hole to extinguish the arc between the conductive block and the power connection block, so that each time the switch is closed, a suitable amount of air is compressed each time, the air flow rate and flow rate of the arc extinguishing are guaranteed, and the arc extinguishing effect is guaranteed.

[0016] The utility model solves the problem that when the load switch is closed, the danger can only be reduced by assisting the closing of the switch with an external auxiliary closing structure, which is inconvenient to use. When the switch is closed and the power supply is restored, the handle is rotated so that the handle leaves the L-shaped limit frame. At this time, the damping movement between the rotating rod and the damping sleeve generates a negative pressure in the movable housing, so that the air in the power connection shell enters the movable housing through the one-way air inlet pipe, and the pushing plate and the vent pipe slowly move to reset. During this process, the spring is in a stretched state. During the resetting process of the vent pipe, the spring contracts, driving the fixed disk and the insulating plug rod to push the conductive block to reset. When the pushing plate is reset through the damping sleeve, damping is generated on the rotating rod. When the operator releases the handle, the pushing plate is slowly reset, delaying the time for the switch to restore power, making the operator safer and more convenient to use when closing the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a partial cross-sectional structural stereogram of a 38KV intelligent load switch;

[0019] Figure 2 It is a three-dimensional diagram of the cutaway structure of the movable housing;

[0020] Figure 3 A three-dimensional diagram of the push plate structure;

[0021] Figure 4 It is a three-dimensional diagram of the cross-section structure of the power connection shell;

[0022] Figure 5 It is a three-dimensional diagram of the conductive block structure.

[0023] Reference numerals:

[0024] 1. Movable housing; 101. Movable block; 102. One-way air inlet pipe; 103. Damping sleeve; 104. Air vent 1; 105. L-shaped limit frame; 2. Push plate; 201. Rotating rod; 202. Handle; 203. Compression spring; 204. Air vent; 205. Jet hole; 206. Air inlet hole; 3. Electrical shell; 301. Air vent 2; 302. Electrical block; 303. Electrical sheet; 4. Conductive block; 401. Insulating plug rod; 402. Fixed plate; 403. Spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0026] See also Figure 1-5The utility model is a 38KV intelligent load switch, comprising a movable shell 1, a push plate 2, a power connection shell 3 and a conductive block 4. The movable shell 1 is movably connected with the push plate 2, and the movable shell 1 movably connects the push plate 2 therein. The push plate 2 is pushed by the push plate 2 so that the air therein is compressed. A rotating rod 201 is rotatably connected to the center of one side of the push plate 2. The rotating rod 201 is movably connected to one end of the movable shell 1. The push plate 2 is connected to the handle 202 through the rotating rod 201. A damping sleeve 103 is fixed on the end surface of the movable shell 1 outside the rotating rod 201. The rotating rod 201 is sleeved in the damping sleeve 103. When the push plate 2 is reset, damping is generated on the rotating rod 201 through the damping sleeve 103. When the operator releases the handle 202, the push plate 2 is slowly reset. A ventilation pipe 204 is fixed to the center of the side of the push plate 2 away from the rotating rod 201. The ventilation pipe 204 Both ends are closed, and the vent pipe 204 outputs the air in the movable shell 1 through the jet hole 205 and the air inlet hole 206. The vent pipe 204 is inserted through the end of the movable shell 1 away from the rotating rod 201 and extends out of the movable shell 1. The end of the movable shell 1 away from the damping sleeve 103 is fixed with a power connection shell 3, and a conductive block 4 is arranged in the power connection shell 3. The conductive block 4 is arranged therein through the power connection shell 3, and the conductive block 4 is matched with the power connection block 302 in the power connection shell 3. When the conductive block 4 and the power connection block 302 in the power connection shell 3 are attached, electricity is connected, and when the conductive block 4 and the power connection block 302 in the power connection shell 3 are separated from each other, the power is cut off. An insulating plug rod 401 is fixed to the end of the conductive block 4 away from the movable shell 1, and the insulating plug rod 401 is inserted through the side of the power connection shell 3 away from the movable shell 1. The conductive block 4 is inserted into the power connection shell 3 through the insulating plug rod 401 to limit the movement trajectory of the conductive block 4.

[0027] Specifically, a vent hole 104 is formed through the end of the movable shell 1 above the damping sleeve 103, and an L-shaped limit frame 105 is fixed to the end surface of the movable shell 1 below the damping sleeve 103. When the push plate 2 moves in the movable shell 1, the space between the inner wall of the movable shell 1 close to the damping sleeve 103 and the push plate 2 is ventilated through the vent hole 104, and the position of the handle 202 and the rotating rod 201 after being pushed is limited by the L-shaped limit frame 105.

[0028] Furthermore, a movable block 101 is fixed to the inner top of the movable shell 1, and a one-way air inlet pipe 102 is fixed through the end of the movable shell 1 above the ventilation pipe 204. The movable shell 1 is movably connected to the ventilation pipe 204 through the movable block 101. The movable shell 1 inputs the air in the power connection shell 3 into the movable shell 1 through the one-way air inlet pipe 102 when the movable shell 1 is under negative pressure.

[0029] Furthermore, a handle 202 is fixed to one end of the rotating rod 201 away from the pushing plate 2, and compression springs 203 are fixed to the four corners of the pushing plate 2 outside the ventilation pipe 204. The end of the compression spring 203 away from the pushing plate 2 is fixed to the inner wall of the movable shell 1. When the rotating rod 201 is working, the handle 202 provides a holding effect for the power switch, and the compression spring 203 is used to push the pushing plate 2 to move after the handle 202 is released from the L-shaped limit frame 105.

[0030] Furthermore, the ventilation pipe 204 is inserted through the movable block 101, and the ventilation pipe 204 in the movable block 101 is symmetrically provided with air inlet holes 206 on its circumference, and the end of the ventilation pipe 204 outside the movable outer shell 1 is symmetrically provided with jet holes 205 on its circumference. When the ventilation pipe 204 is transporting air, the ventilation pipe 204 inputs the compressed air in the movable outer shell 1 through the air inlet holes 206 and sprays it out through the jet holes 205.

[0031] The operation process of this embodiment is as follows: during operation, when it is necessary to cut off the power, hold the handle 202, push the rotating rod 201, drive the pushing plate 2 to move in the movable shell 1, and the compression spring 203 is compressed. At the same time, the air in the movable shell 1 is initially compressed until the handle 202 moves into the L-shaped limit frame 105. At this time, the vent pipe 204 pushes the conductive block 4 to leave the power connection block 302. At the same time, the air inlet 206 on the vent pipe 204 is exposed in the movable shell 1. The air compressed by the pushing plate 2 in the movable shell 1 enters the air inlet 206 on the vent pipe 204, and is ejected from the air jet hole 205 to extinguish the arc between the conductive block 4 and the power connection block 302. When the power is cut off, rotate the handle 202 so that the handle 202 is restricted on the L-shaped limit frame 105 to ensure that the conductive block 4 and the power connection block 302 in the power connection shell 3 are separated from each other and the power is cut off. Specific embodiment 2

[0032] See also Figure 1-5 On the basis of the specific embodiment 1, the power connection block 302 is symmetrically fixed along the central axis of the conductive block 4 in the power connection shell 3, the conductive block 4 is in contact with the two power connection blocks 302 respectively, and a power connection sheet 303 is fixed at one end of the two power connection blocks 302 away from each other. A second vent hole 301 is opened through the upper part of the power connection shell 3 away from the movable shell 1. The power connection shell 3 is in contact with the conductive block 4 through the power connection block 302 to connect electricity, and is connected to the external conductive line through the power connection sheet 303 to perform the power connection function. The power connection shell 3 is ventilated to the outside through the second vent hole 301.

[0033] Specifically, a fixing plate 402 is fixed to the end of the insulating rod 401 away from the conductive block 4, a spring 403 is fixed to the outer side of the insulating rod 401 near the end of the fixed plate 402 close to the power connection shell 3, and the end of the spring 403 away from the fixing plate 402 is fixed to the side of the power connection shell 3 away from the movable shell 1. The insulating rod 401 is connected to the spring 403 through the fixing plate 402 and is connected to the power connection shell 3 through the spring 403. When the conductive block 4 is pushed, the spring 403 is stretched. During the resetting process of the ventilation pipe 204, the spring 403 contracts, driving the fixing plate 402 and the insulating rod 401 to push the conductive block 4 to reset.

[0034] The operation process of this embodiment is as follows: during operation, when the vent pipe 204 pushes the conductive block 4 away from the power connection block 302, the power connection block 302 is de-energized. When the switch needs to be closed to restore power, the handle 202 is rotated so that the handle 202 leaves the L-shaped limit frame 105. At this time, the damping movement between the rotating rod 201 and the damping sleeve 103 generates a negative pressure in the movable housing 1, so that the air in the power connection shell 3 enters the movable housing 1 through the one-way air inlet pipe 102, and the push plate 2 and the vent pipe 204 slowly move to reset. During this process, the spring 403 is in a stretched state. During the resetting process of the vent pipe 204, the spring 40 3 contracts, driving the fixed plate 402 and the insulating plug rod 401 to push the conductive block 4 to reset, and air continuously enters the power connection shell 3 through the second vent hole 301 to blow out the arc generated between the conductive block 4 and the power connection block 302, and extinguishes the arc to a certain extent. When the handle 202 leaves the L-shaped limit frame 105, the power connection between the two power connection blocks 302 is not restored through the conductive block 4. When the push plate 2 is reset, the damping sleeve 103 generates damping on the rotating rod 201. When the operator releases the handle 202, the push plate 2 is slowly reset, delaying the time for the switch to resume power supply, and making the operator safer when closing the switch.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A 38KV intelligent load switch, comprising a movable housing (1), a push plate (2), a power connection housing (3) and a conductive block (4), characterized in that: A push plate (2) is movably connected inside the movable housing (1); a rotating rod (201) is rotatably connected to the center of one side of the push plate (2); the rotating rod (201) is movably connected to one end of the movable housing (1); a damping sleeve (103) is fixed to the end surface of the movable housing (1) outside the rotating rod (201); the rotating rod (201) is sleeved in the damping sleeve (103); and a ventilation pipe (204) is fixed to the center of the side of the push plate (2) away from the rotating rod (201). The ventilation pipe (204) is inserted through one end of the movable housing (1) away from the rotating rod (201) and extends out of the movable housing (1); an electrical connection shell (3) is fixed to one end of the movable housing (1) away from the damping sleeve (103); a conductive block (4) is arranged inside the electrical connection shell (3); an insulating plug rod (401) is fixed to one end of the conductive block (4) away from the movable housing (1); and the insulating plug rod (401) is inserted through one side of the electrical connection shell (3) away from the movable housing (1).

2. A 38KV intelligent load switch according to claim 1, characterized in that: A vent hole (104) is provided through the end of the movable housing (1) above the damping sleeve (103), and an L-shaped limit frame (105) is fixed to the end surface of the movable housing (1) below the damping sleeve (103).

3. A 38KV intelligent load switch according to claim 1, characterized in that: A movable block (101) is fixed to the inner top of the movable housing (1), and a one-way air inlet pipe (102) is fixed through the end of the movable housing (1) above the ventilation pipe (204).

4. A 38KV intelligent load switch according to claim 1, characterized in that: A handle (202) is fixed to one end of the rotating rod (201) away from the pushing plate (2), compression springs (203) are fixed to the four corners of the pushing plate (2) outside the vent pipe (204), and one end of the compression spring (203) away from the pushing plate (2) is fixed to the inner wall of the movable housing (1).

5. A 38KV intelligent load switch according to claim 3, characterized in that: The ventilation pipe (204) is inserted through the movable block (101), and air inlet holes (206) are symmetrically opened on the circumference of the ventilation pipe (204) in the movable block (101), and air jet holes (205) are symmetrically opened on the circumference of the end of the ventilation pipe (204) outside the movable housing (1).

6. A 38KV intelligent load switch according to claim 1, characterized in that: A power connection block (302) is symmetrically fixed through the power connection shell (3) along the central axis of the conductive block (4); the conductive block (4) is in contact with two power connection blocks (302) respectively; a power connection sheet (303) is fixed to one end of the two power connection blocks (302) away from each other; and a second vent hole (301) is provided through the upper portion of the power connection shell (3) away from the movable housing (1).

7. The 38KV intelligent load switch according to claim 1 is characterized in that: A fixing plate (402) is fixed to one end of the insulating plug rod (401) away from the conductive block (4); a spring (403) is fixed to the outside of the insulating plug rod (401) at one end of the fixing plate (402) close to the power connection shell (3); and one end of the spring (403) away from the fixing plate (402) is fixed to a side of the power connection shell (3) away from the movable shell (1).

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