Double-handcart removable switch cabinet
By designing the disconnect circuit breaker and current transformer as a handcart type, the problem of difficult maintenance and replacement of current transformers and the need to improve heat dissipation performance have been solved, realizing convenient maintenance and replacement of current transformers and improving the heat dissipation performance of switchgear.
Patent Information
- Application Number
- CN202520006637.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-02
AI Technical Summary
The maintenance and replacement of current transformers in existing 40.5kV switchgear are difficult, and the internal component arrangement is not conducive to heat dissipation.
The circuit breakers and current transformers are designed as handcarts for easy maintenance and replacement, and the component layout is improved to facilitate heat dissipation.
It enables convenient maintenance and replacement of current transformers and improves the heat dissipation performance of switchgear.
Smart Images
Figure CN223927898U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of switch cabinet, especially a double-handcart removal type switch cabinet. BACKGROUND
[0002] In the power system, high-voltage switch equipment is the key component to ensure the safe and stable operation of the power grid. Especially in 12kV, 40.5kV power system, complete switch cabinet is widely used in indoor switch equipment due to its compact structure, complete functions, convenient operation and other characteristics. These switch cabinets not only bear the important task of power distribution, protection and control, but also directly relate to the reliability and safety of the power system. At present, complete switch cabinet is mainly divided into two categories: fixed type and handcart type. The fixed type switch cabinet adopts the traditional design method, that is, all functional elements, including circuit breakers, current transformers, voltage transformers, arresters, grounding switches, etc., are directly fixed in their respective compartments; the handcart type is to install some functional elements on the movable handcart, such as circuit breaker handcart, isolation handcart, fuse handcart, voltage transformer handcart, etc., and other components are still fixedly installed in the corresponding compartments; for 12kV complete switch cabinet, due to the small size and light weight of each element, it is not difficult to overhaul and replace the components fixedly installed in the cabinet; but for 40.5kV complete switch cabinet, due to the large size and heavy weight of the elements, it is more difficult to detect and replace the components fixedly installed in the cabinet, such as the vertical rotation removal type switch cabinet, the circuit breaker is generally set as a handcart type in the cabinet, and the current transformer in the cabinet is still installed in a fixed manner, which causes many difficulties in overhauling and replacing the current transformer, and moreover, the internal component arrangement structure of the existing switch cabinet is not conducive to the heat dissipation in the cabinet, therefore, it is necessary to improve the structure of the switch cabinet. SUMMARY
[0003] The utility model aims at solving the above technical problems, and provides a double-handcart removal type switch cabinet, which improves the installation structure of the components in the switch cabinet, so that it is convenient for maintenance and heat dissipation.
[0004] The double-hand trolley movable switch cabinet comprises a cabinet body, a main bus, a contact box, an isolation circuit breaker trolley, a current transformer trolley, a grounding switch and a cable, the cabinet body is provided with a main bus room, a circuit breaker room and a cable room from top to bottom, the main bus and the contact box are arranged in the main bus room, the main bus is installed on the contact box, the upper end of the contact box is communicated with the outside of the cabinet body through an exhaust pipe, the isolation circuit breaker trolley is installed in the circuit breaker room, the current transformer trolley is installed between the circuit breaker room and the cable room, the grounding switch and the cable are installed in the cable room, the upper movable contact of the isolation circuit breaker trolley is engaged with the first static contact of the contact box, the lower movable contact of the isolation circuit breaker trolley is engaged with the second static contact of the upper terminal of the current transformer trolley, the lower terminal of the current transformer trolley is connected with the grounding switch and the cable, and the isolation circuit breaker trolley and the current transformer trolley can be moved out of the cabinet body from one side of the cabinet body.
[0005] According to the double-hand trolley movable switch cabinet, the isolation circuit breaker and the current transformer with heavy weight in the switch cabinet are manufactured into trolleys, when the isolation circuit breaker trolley or the current transformer trolley needs to be repaired or replaced, the maintenance personnel only need to move the isolation circuit breaker trolley or the current transformer trolley out of the cabinet body, so that the isolation circuit breaker trolley or the current transformer trolley can be conveniently repaired and replaced, meanwhile, the arrangement structure in the switch cabinet is improved, the main bus and the contact box, the isolation circuit breaker trolley, the current transformer trolley, the grounding switch and the cable are arranged from top to bottom at one time, the components are connected with each other, when the switch cabinet enters the working state, the cabinet body can be penetrated from top to bottom, and the heat generated during the work can be discharged to the outside of the cabinet body through the exhaust pipe.
[0006] Further, the cabinet body is provided with a circuit breaker room door which can be closed or opened, and the circuit breaker room door enables the isolation circuit breaker trolley and the current transformer trolley to be moved out of the cabinet body from one side of the cabinet body.
[0007] Still further, the cabinet body is further provided with a circuit breaker guide rail and a transformer guide rail, and the isolation circuit breaker trolley and the current transformer trolley are slidably installed on the circuit breaker guide rail and the transformer guide rail respectively. The circuit breaker guide rail and the transformer guide rail are used for bearing the trolleys and guiding the sliding of the trolleys.
[0008] Still further, the isolation circuit breaker trolley and the current transformer trolley are respectively provided with locking structures, and the isolation circuit breaker trolley and the current transformer trolley are locked on the cabinet body through the locking structures. The locking structures can lock the positions of the isolation circuit breaker trolley and the current transformer trolley in the cabinet body after the isolation circuit breaker trolley and the current transformer trolley are pushed into the cabinet body, so that the trolleys are prevented from being displaced during the work of the switch cabinet.
[0009] Further, the cable chamber is provided with cable chamber doors on the front and rear of the cabinet body, and the cable chamber is through when the two cable chamber doors are opened simultaneously.
[0010] Further, the main bus chamber and the circuit breaker chamber are provided with a shutter, the isolation circuit breaker trolley is provided with a longitudinal rotary isolation vacuum circuit breaker, the upper movable contact is arranged on the longitudinal rotary isolation vacuum circuit breaker, the longitudinal rotary isolation vacuum circuit breaker comprises an isolation state and a working state, and the shutter is opened by rotating the longitudinal rotary isolation vacuum circuit breaker to make the upper movable contact engage with the first static contact of the contact box.
[0011] Further, the cabinet body further comprises pressure release channels of the respective compartments, the pressure release channel of the cable chamber is arranged at the rear of the cabinet body, and the pressure release channels of the circuit breaker chamber and the main bus chamber are arranged at the top of the cabinet body.
[0012] Further, the cabinet body further comprises a pressure release channel of the respective compartments, the pressure release channel of the cable chamber is arranged at the rear of the cabinet body, and the pressure release channels of the circuit breaker chamber and the main bus chamber are arranged at the top of the cabinet body.
[0013] Further, the cabinet body further comprises a pressure release channel of the respective compartments, the pressure release channel of the cable chamber is arranged at the rear of the cabinet body, and the pressure release channels of the circuit breaker chamber and the main bus chamber are arranged at the top of the cabinet body. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a sectional view of the double-trolley removable switch cabinet.
[0015] Figure 2 It is a sectional view of the double-trolley removable switch cabinet.
[0016] Figure 3 It is a sectional view of the double-trolley removable switch cabinet.
[0017] Figure 4 It is a front view of the current transformer trolley.
[0018] Figure 5 It is a front view of the current transformer trolley. DETAILED DESCRIPTION
[0019] A double-trolley removable switch cabinet is described in combination with the drawings.
[0020] As Figures 1 to 5 shown in the figure, a double-hand cart movable switch cabinet includes a cabinet, a main bus 12, a contact box 13, an isolation circuit breaker handcart 4, a current transformer handcart 6, a grounding switch 8 and a cable 10. The cabinet is provided with a main bus room 3, a circuit breaker room 5 and a cable room 7 from top to bottom. The cabinet divides the internal space into various chambers by a metal partition plate or a shutter mechanism 52. The metal partition plate is preferably an aluminized zinc plate. The cabinet also includes an instrument room 2 and a small bus room 1. The instrument room 2 is arranged in the cabinet in front of the main bus room 3. The small bus room 1 is arranged at the top of the cabinet. The front side of the cabinet is provided with an instrument room door 18, a circuit breaker room door 20 and a first cable room door 21 from top to bottom. The rear side of the cabinet is provided with a cabinet rear upper door 15, a cabinet rear middle door 16 and a second cable room door 17 from top to bottom. The main bus 12 and the contact box 13 are arranged in the main bus room 3. The main bus 12 is provided with three-phase main buses 12 in a longitudinal arrangement mode. The contact box 13 is also provided with three. Each phase of the main bus 12 is installed on one contact box 13. The upper end of each contact box 13 is connected to the outside of the cabinet through an exhaust pipe 11. The main bus 12 is directly installed through the contact box 13, which saves the cost of the branch bus originally used to connect the main bus 12 and the contact box 13 and the cost of the insulator originally used to support the main bus 12. The isolation circuit breaker handcart 4 is installed in the circuit breaker room 5. The current transformer handcart 6 is installed between the circuit breaker room 5 and the cable room 7. The grounding switch 8 and the cable 10 are installed in the cable room 7. When the switch cabinet enters the working state, the upper moving contact of the isolation circuit breaker handcart 4 engages with the first static contact of the contact box 13. The lower moving contact of the isolation circuit breaker handcart 4 engages with the second static contact of the upper terminal 616 of the current transformer handcart 6. The lower terminal 615 of the current transformer handcart 6 is connected with the grounding switch 8 and the cable 10. The internal space of the cabinet can be vertically penetrated. The heat generated during work can be discharged to the outside of the cabinet through the exhaust pipe 11. The isolation circuit breaker handcart 4 and the current transformer handcart 6 are respectively provided with a locking structure. The isolation circuit breaker handcart 4 and the current transformer handcart 6 are locked on the cabinet through the locking structure. When the switch cabinet enters the isolation state, the isolation circuit breaker handcart 4 and the current transformer handcart 6 can be moved out of the cabinet from one side of the cabinet. When it needs to be repaired or replaced, maintenance personnel only need to move the isolation circuit breaker handcart 4 or the current transformer handcart 6 out of the cabinet, so that the maintenance and replacement can be conveniently carried out.
[0021] As Figures 1 to 3 shown in the figure, the instrument room door 18 corresponds to the instrument room 2. The instrument room 2 is used for installing secondary elements of the switch cabinet. The secondary elements realize the tasks of control, protection, monitoring and measurement of primary elements (including the main bus 12, the contact box 13, the isolation circuit breaker handcart 4, the current transformer handcart 6, the grounding switch 8 and the cable 10) in the switch cabinet.
[0022] As Figures 1 to 3 shown, the main bus chamber 3 is located at the rear of the instrument room 2, and the main bus chamber 3 is mainly installed with the main bus 12, the contact box 13, the exhaust pipe 11 and the wall bushing 19, the wall bushing 19 is arranged on one side wall of the main bus chamber 3, and the wall bushing 19 is used for protecting and guiding the conductor or wire harness from the inside of the switch cabinet to the outside or another device through the wall.
[0023] As Figures 1 to 3 shown, the circuit breaker chamber 5 is located below the instrument room 2 and the main bus chamber 3, and the main bus chamber 3 and the circuit breaker chamber 5 are provided with a shutter mechanism 52, and the circuit breaker chamber 5 is also provided with a shutter mechanism 52 mechanism, a circuit breaker rail 53, a positioning device 54 and a interlocking device 55, and the shutter mechanism 52 is opened and closed under the driving of the shutter mechanism 52 mechanism, when opened, the upper movable contact of the isolation circuit breaker trolley 4 is engaged with the first static contact of the contact box 13, and when closed, the upper movable contact of the isolation circuit breaker trolley 4 is separated from the first static contact of the contact box 13.
[0024] The circuit breaker rail 53 is installed and fixed on both sides of the circuit breaker chamber 5, and is mainly used for bearing the isolation circuit breaker trolley 4 and sliding the isolation circuit breaker trolley 4 in and out of the switch cabinet, and each side of the front end of the circuit breaker rail 53 has a locking hole, and the rear end has the positioning device 54 and the interlocking device 55, the isolation circuit breaker trolley 4 is pushed into the cabinet, the isolation circuit breaker trolley 4 is correctly positioned by the positioning device 54, and at the same time, the lock rod on the isolation circuit breaker trolley 4 is automatically inserted into the locking hole on both sides of the front end of the circuit breaker rail 53, and the interlocking device 55 also locks the isolation circuit breaker trolley 4, so as to ensure that the isolation circuit breaker trolley 4 is correctly and reliably positioned, and when the isolation circuit breaker trolley 4 needs to be pulled out, only the interlocking device 55 and the lock rod on the isolation circuit breaker trolley 4 are unlocked and withdrawn, the isolation circuit breaker trolley 4 can be pulled out.
[0025] As Figures 1 to 5As shown, the current transformer trolley 6 further comprises a trolley 61, which comprises a trolley frame 611, a locking rod 612, a handle 613, and a positioning pin 614. An inter-transformer rail 22 is arranged between the circuit breaker chamber 5 and the cable chamber 7, and the current transformer trolley 6 is slidably mounted on the inter-transformer rail 22, which supports and guides the sliding of the current transformer trolley 6. The front end of the inter-transformer rail 22 has a locking hole on each of the left and right sides, and the rear part of the cabinet has two positioning holes 23. When the current transformer trolley 6 is pushed into the cabinet, the two positioning holes 23 in the cabinet cooperate with the positioning pin 614 at the rear end of the current transformer trolley 6 to position the current transformer trolley 6. The left and right locking rods 612 at the front end of the current transformer trolley 6 cooperate with the locking holes on the inter-transformer rail 22. After being positioned, the locking rods 612 of the current transformer trolley 6 extend into the locking holes, and the current transformer trolley 6 is locked. The two positioning holes 23 in the cabinet cooperate with the positioning pin 614 at the front end of the current transformer trolley 6 to ensure that the current transformer trolley 6 is correctly positioned in the cabinet. The current transformer 62 is seated on the trolley frame 611. The current transformer has a full-insulation up-and-down wiring structure. The upper terminal 616 cooperates with the static contact and the movable contact of the circuit breaker, and the lower terminal 615 is connected to the grounding switch 8 and the cable 10 for wiring. When it is necessary to remove the current transformer trolley 6 from the cabinet, the locking rods 612 are simply unlocked, and the current transformer trolley 6 can be easily pulled out along the inter-transformer rail 22 by holding the handle 613, which facilitates maintenance and replacement.
[0026] The circuit breaker chamber door 20 on the cabinet is openable and closable, and the length of the circuit breaker chamber door 20 is longer than the length of the circuit breaker chamber 5, so that the circuit breaker trolley 4 and the current transformer trolley 6 can be removed from the cabinet by the circuit breaker chamber door 20.
[0027] As shown in the drawings, Figures 1 to 3 The first cable chamber door 21 and the second cable chamber door 17 can be opened at the same time, which makes the cable chamber 7 through from front to back, so that the switch cabinet can be installed against the wall and can be maintained on both sides, which is extremely convenient for installation and maintenance. From the front of the cabinet, the isolation breaking, instrument indication, and relay can be monitored, the isolation vacuum circuit breaker and the grounding switch 8 can be operated, the running state of the isolation vacuum circuit breaker and the current transformer can be observed and monitored, the isolation vacuum circuit breaker, the current transformer, and the cable 10 end can be removed and checked and maintained, and the cable 10 fault can be found and the cable 10 end can be maintained from the back of the cabinet.
[0028] The cabinet further comprises a pressure release channel for each compartment. The pressure release channel 14 of the cable chamber 7 is arranged at the rear part of the cabinet, and the pressure release channels of the circuit breaker chamber 5 and the main bus chamber 3 are arranged at the top of the cabinet. Each pressure release channel is connected to the outside of the cabinet. If a fault occurs in a compartment, the energy can be discharged to the outside of the cabinet through the pressure release channel, so as to avoid affecting other compartments.
[0029] A lightning arrester 9 is also included, which is installed in the cable chamber 7.
[0030] According to the disclosure and teaching of the above description, the skilled in the art can also change and modify the above embodiments. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the utility model should fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the utility model.
Claims
1. A dual-hand cart removable switchgear cabinet, characterized by, The application relates to a cabinet, which comprises a cabinet body, a main bus, a contact box, an isolation circuit breaker handcart, a current transformer handcart, a grounding switch and a cable, wherein the cabinet body is provided with a main bus chamber, a circuit breaker chamber and a cable chamber from top to bottom, the main bus and the contact box are arranged in the main bus chamber, the main bus is arranged on the contact box, the upper end of the contact box is connected with the outside of the cabinet body through an exhaust pipe, the isolation circuit breaker handcart is arranged in the circuit breaker chamber, the current transformer handcart is arranged between the circuit breaker chamber and the cable chamber, the grounding switch and the cable are arranged in the cable chamber, the upper movable contact of the isolation circuit breaker handcart is engaged with the first static contact of the contact box, the lower movable contact of the isolation circuit breaker handcart is engaged with the second static contact of the upper terminal of the current transformer handcart, the lower terminal of the current transformer handcart is connected with the grounding switch and the cable, and the isolation circuit breaker handcart and the current transformer handcart can be moved out of the cabinet body from one side of the cabinet body.
2. The dual-hand cart movable switchgear cabinet according to claim 1, characterized in that, A circuit breaker chamber door is arranged on the cabinet body and can be closed or opened, and the circuit breaker chamber door enables the isolation circuit breaker handcart and the current transformer handcart to be moved out of the cabinet body from one side of the cabinet body.
3. The dual-hand cart movable switchgear cabinet according to claim 1, characterized in that, A circuit breaker guide rail and a transformer guide rail are further arranged on the cabinet body, and the isolation circuit breaker handcart and the current transformer handcart are slidably arranged on the circuit breaker guide rail and the transformer guide rail respectively.
4. The dual-hand cart movable switchgear cabinet according to claim 1, characterized in that, Locking structures are arranged on the isolation circuit breaker handcart and the current transformer handcart respectively, and the isolation circuit breaker handcart and the current transformer handcart are locked on the cabinet body through the locking structures.
5. The dual hand car removable switchgear cabinet of claim 1, wherein, Cable chamber doors are arranged on the front and rear of the cable chamber, and the cable chamber is penetrated when the two cable chamber doors are simultaneously opened.
6. The dual-hand cart movable switchgear cabinet according to claim 1, characterized in that, A shutter is arranged between the main bus chamber and the circuit breaker chamber, a longitudinal rotary isolation vacuum circuit breaker is arranged on the isolation circuit breaker handcart, the upper movable contact is arranged on the longitudinal rotary isolation vacuum circuit breaker, the longitudinal rotary isolation vacuum circuit breaker comprises an isolation state and a working state, and the shutter is opened by rotating the longitudinal rotary isolation vacuum circuit breaker to enable the upper movable contact to be engaged with the first static contact of the contact box.
7. The dual hand car removable switchgear cabinet of claim 1, wherein, The cabinet further comprises pressure release channels of the respective chambers, the pressure release channel of the cable chamber is arranged at the rear of the cabinet body, the pressure release channels of the circuit breaker chamber and the main bus chamber are arranged at the top of the cabinet body, and the pressure release channels are connected with the outside of the cabinet body.
8. The dual hand car removable switchgear cabinet of claim 1, wherein, An instrument chamber and a small bus chamber are further arranged, the instrument chamber is arranged in the cabinet body in front of the main bus chamber, and the small bus chamber is arranged at the top of the cabinet body.
9. The dual hand car removable switchgear cabinet of claim 1, wherein, An arrester is further arranged, and the arrester is arranged in the cable chamber.