CN205563311U - Temperature control device for centrally installed switchgear - Google Patents

Abstract

The utility model discloses a temperature control device for a central cabinet, which comprises a central cabinet provided with a circuit breaker, a blower is installed in the central cabinet, the air outlet of the blower is aligned with the contact of the circuit breaker, and the side or top of the central cabinet An exhaust fan is installed, and a temperature control switch is installed in the central cabinet. The blower and the exhaust fan are connected to the power supply through the temperature control switch. The temperature control switch is equipped with a memory alloy spring. As the temperature in the central cabinet gradually increases, the memory alloy The spring gradually stretches, and the temperature control switch first starts the blower, and then starts the blower and the exhaust fan at the same time; as the temperature in the central cabinet gradually drops, the memory alloy spring shrinks gradually, and the temperature control switch first turns off the exhaust fan, and then Then turn off the blower. Further, the central cabinet is also equipped with a wireless power transmission transmitting module and a wireless power transmission receiving module for supplying power to the blower and exhaust fan. The utility model pertinently lowers the temperature of main heating points, has high reliability of temperature control, and has better energy-saving effect.

Description

A temperature control device for a central cabinet

technical field

The utility model relates to a temperature control device of a switch cabinet, in particular to a temperature control device of a central cabinet.

Background technique

Nowadays, central cabinets are widely used in power transmission and distribution systems. However, the central cabinet often breaks down because the temperature in the central cabinet is too high during operation. During the operation of the central cabinet, the main heating points are some places with high contact resistance, such as the contact of the circuit breaker and the connection of the incoming busbar. Therefore, people began to set up temperature control devices to control the temperature rise of the switchgear. For example, on November 25, 2015, a utility model patent with the patent number ZL201520330249.9 and the name "Switch Cabinet Cooling Control Device" was published, which includes a temperature sensor, a temperature controller, a fan AC contactor and a fan. The temperature inside the switchgear is judged by the temperature sensor, and the start and stop of the ventilator is realized by the temperature controller, which creates a good environment for the operation of the switchgear, thereby reducing the probability of accidents. However, this cooling control device may lose the cooling effect due to the failure of the temperature sensor, and the cooling method is relatively simple and not very specific.

Utility model content

The technical problem to be solved by the utility model is to provide a temperature control device for the central cabinet, which can reduce the temperature of the main heating points in a targeted manner, has high reliability of temperature control, and has a good energy-saving effect.

In order to achieve the above purpose, the technical solution of the present utility model is: a temperature control device of a central cabinet, including a central cabinet provided with an incoming busbar and a circuit breaker, a blower is installed in the central cabinet, and the air outlet of the blower Align with the circuit breaker contacts, there is an exhaust fan on the side or top of the central cabinet, a temperature control switch is installed in the central cabinet, the blower and exhaust fan are connected to the power supply through the temperature control switch, and the temperature control switch has a memory alloy spring, As the temperature in the central cabinet gradually increases, the memory alloy spring gradually elongates, and the temperature control switch first starts the blower, and then starts the blower and exhaust fan at the same time; as the temperature in the central cabinet gradually decreases, the memory alloy spring Gradually shrink, the temperature control switch first turns off the exhaust fan, and then turns off the blower.

Preferably, the temperature control switch includes an insulating box, the right side of the insulating box is pierced with a first conductive column, the left side of the insulating box is pierced with a second conductive column and a third conductive column, and the second conductive column is located in the insulating box. The length of the part is greater than the length of the part of the third conductive column in the insulating box, and the part of the second conductive column in the insulating box is provided with a retractable contact, and the memory alloy spring and a conductive plate are sequentially installed in the insulating box One end of the memory alloy spring is fixedly connected to the right side of the insulating box, and the other end of the memory alloy spring is fixedly connected to the conductive plate. The first conductive column and the conductive plate are electrically connected through a wire. The extension drives the conductive plate to move and touch the second conductive column or touch the second conductive column and the third conductive column at the same time; the memory alloy spring shrinks as the temperature drops and drives the conductive plate to move away from the third conductive column first, and then from the third conductive column Two conductive pillars. The temperature control switch only needs one memory alloy spring to control the blower and exhaust fan, effectively reducing the manufacturing cost.

It is further preferred that the second conductive column includes a fixed sleeve with a stepped through hole in the middle, the fixed sleeve is installed on the left side of the insulating box, the retractable contact is a stepped cylinder, and one end of the retractable contact is fixed In the stepped through hole of the sleeve, the other end of the retractable contact protrudes out of the fixed sleeve and is in the insulating box body. A compression spring is also installed in the stepped through hole of the fixed sleeve, and the stepped through hole of the fixed sleeve is far away from the One end of the retractable contact is screwed to a bolt, one end of the compression spring is supported on the retractable contact, and the other end is supported on the bolt.

As a further improvement, one end of the retractable contact close to the compression spring is provided with a concave hole, and one end of the compression spring is inserted into the concave hole. The reliability of the action of the retractable contact can be improved.

Preferably, when the total length of the memory alloy spring is extended to 3 cm, the conductive plate is driven to touch the second conductive column; when the total length of the memory alloy spring is extended to 4 cm, the conductive plate is driven to touch the second conductive column and the third conductive column at the same time. Conductive pillars.

Preferably, the insulating box body is connected into a square body by the left side plate, the right side plate, the front side plate, the rear side plate, the bottom plate and the top plate, the front side plate, the rear side plate, the bottom plate and the top plate are connected as one, and the left side plate is connected by screws It is locked on the front side panel and the rear side panel, and the right side panel is also locked on the front side panel and the rear side panel by screws. On the left side plate, one end of the memory alloy spring is fixedly connected to the inner surface of the right side plate.

As a further improvement, a mounting protrusion is respectively extended to both sides of the bottom plate, and a mounting hole is provided on the mounting protrusion. It is convenient to install the temperature control switch.

As a further improvement, the front side plate and the rear side plate are respectively provided with a plurality of ventilation holes. It is beneficial to reduce the temperature difference between the inside and outside of the insulating box and improve the temperature control accuracy.

Further, the central cabinet is also equipped with a current transformer, a wireless power transmission transmitting module, a wireless power transmission receiving module and an outgoing line busbar, the current transformer is installed on the outgoing line busbar, and the outgoing line busbar is connected to the incoming line busbar through a circuit breaker The input terminal of the wireless power transmission transmitter module is connected to the secondary side of the current transformer, and the blower and exhaust fan are connected to the wireless power transmission receiving module through a temperature control switch. The wireless power transmission receiving module and the wireless power transmission transmitting module cooperate to provide power for the blower and exhaust fan. The power supply is provided by the wireless power transmission receiving module and the wireless power transmission transmitting module, which is beneficial to the location arrangement and line arrangement of the blower, exhaust fan and temperature control switch.

Because the utility model is equipped with a blower in the central cabinet, the air outlet of the blower is aligned with the circuit breaker contact, and the side or top of the central cabinet is provided with an exhaust fan, so that the main heating points can be cooled in a targeted manner; and the temperature control The switch is equipped with a memory alloy spring. As the temperature in the central cabinet gradually increases, the memory alloy spring gradually elongates. The temperature control switch first starts the blower, and then starts the blower and exhaust fan at the same time; Gradual decline, the memory alloy spring gradually shrinks, the temperature control switch first turns off the exhaust fan, and then turns off the blower. The two-way shape memory effect of memory alloy is to restore the high-temperature phase shape when heated, and restore the low-temperature phase shape when cooled, that is, the phenomenon of spontaneously and reversibly recovering the high-low temperature phase shape through temperature rise and fall, so that the memory alloy spring has high reliability. Its temperature control reliability is high.

On the other hand, when the temperature rise in the central cabinet is small, the temperature control switch only starts the blower to work, and only when the temperature rise in the central cabinet is large, the temperature control switch starts the blower and exhaust fan at the same time, so it has better energy saving effect.

Description of drawings

Fig. 1 is a schematic diagram of the layout of the utility model;

Fig. 2 is a perspective view of the utility model temperature control switch;

Fig. 3 is the A direction view of Fig. 2;

Fig. 4 is a B-B cross-sectional view of Fig. 3 when the conductive plate is separated from the second conductive post and the third conductive post;

Fig. 5 is an enlarged view at C of Fig. 4;

Fig. 6 is a B-B cross-sectional view of Fig. 3 when the conductive plate only touches the second conductive column;

FIG. 7 is a B-B cross-sectional view of FIG. 3 when the conductive plate touches the second conductive post and the third conductive post at the same time.

detailed description

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 5, a temperature control device for a central cabinet includes a central cabinet 300 provided with an incoming busbar 100 and a circuit breaker 200, a blower 10 is installed in the central cabinet 300, and an outlet of the blower 10 The air outlet is aligned with the circuit breaker contact 201, and the side of the central cabinet 300 is provided with an exhaust fan 20 close to the incoming busbar 100. control switch 30, the blower 10 and the exhaust fan 20 are connected to the power supply through the temperature control switch 30, the temperature control switch 30 has a memory alloy spring 5, and as the temperature in the central cabinet 300 gradually increases, the memory alloy spring 5 gradually stretches Long, the temperature control switch 30 first starts the blower 10, and then starts the blower 10 and the exhaust fan 20 at the same time; as the temperature in the central cabinet 300 gradually drops, the memory alloy spring 5 gradually shrinks, and the temperature control switch 30 is first closed Blower 20, and then close blower 10.

As further shown in Figures 2 to 5, the temperature control switch 30 includes an insulating box body 1, a first conductive column 2, a second conductive column 3 and a third conductive column 4, and the insulating box body 1 consists of a left side panel 11. The right side plate 12, the front side plate 13, the rear side plate 14, the bottom plate 15 and the top plate 16 are connected into a square body, the front side plate 13, the rear side plate 14, the bottom plate 15 and the top plate 16 are connected as one, and the left side plate 11 passes through Screws are locked on the front side plate 13 and the rear side plate 14, and the right side plate 12 is also locked on the front side plate 13 and the rear side plate 14 by screws.

The first conductive column 2 is pierced on the right side plate 12 and fixed with nuts. The first conductive column 2 is electrically connected to the power supply line. The second conductive column 3 and the third conductive column 4 are pierced on the left side plate 11 and fixed with nuts. Formed fixed, the second conductive column 3 is electrically connected to the blower 10 , and the third conductive column 4 is electrically connected to the exhaust fan 20 .

The length of the part where the second conductive column 3 is in the insulating box body 1 is greater than the length of the part where the third conductive column 4 is in the insulating box body 1, and the part where the second conductive column 3 is in the insulating box body 1 is provided with a telescopic Contact 31, the second conductive column 3 also includes a fixed sleeve 32 with a stepped through hole in the middle, the fixed sleeve 32 is pierced on the left side plate 11 and fastened with a nut, and the retractable contact 31 is Stepped cylindrical body, one end of the retractable contact 31 is in the stepped through hole of the fixed sleeve 32, the other end of the retractable contact 31 extends out of the fixed sleeve 32 and is in the insulating box 1, the stepped shape of the fixed sleeve 32 A compression spring 33 is also housed in the through hole, and the stepped through hole of the fixed sleeve 32 is screwed with a bolt 34 away from the end of the retractable contact 31. On the bolt 34 , one end of the retractable contact 31 close to the compression spring 33 is provided with a concave hole, and one end of the compression spring 33 is inserted into the concave hole.

The memory alloy spring 5 and a conductive plate 6 are successively installed in the insulating box body 1. One end of the memory alloy spring 5 is fixedly connected to the inner surface of the right side plate 12, and the other end of the memory alloy spring 5 is fixedly connected to the conductive plate 6. The first The conductive column 2 and the conductive plate 6 are also electrically connected through a wire 7, and the memory alloy spring 5 elongates as the temperature rises to drive the conductive plate 6 to move and touch the second conductive column 3 or touch the second conductive column at the same time 3 and the third conductive column 4, as shown in Figure 6 and Figure 7; the memory alloy spring 5 will also shrink with the temperature drop to drive the conductive plate 6 to move away from the third conductive column 4, and then from the second conductive column 3.

The memory alloy spring 5 can be a nickel-titanium memory alloy spring.

Two mounting protrusions 151 are respectively extended from the bottom plate 15 , and mounting holes 152 are formed on the mounting protrusions 151 .

The front side plate 13 and the rear side plate 14 are also respectively provided with a plurality of ventilation holes 17 . To reduce the temperature difference between the inside and outside of the insulating box 1.

After the temperature in the central cabinet 300 rises, it can be set that when the total length of the memory alloy spring 5 is extended to 3 cm, the conductive plate 6 is driven to touch the retractable contact 31 on the second conductive column 3, as shown in Figure 6 Shown, so that the first conductive column 2 and the second conductive column 3 form an electrical connection and conduct all the way, and the blower 10 starts to work at this time; When extending to 4cm, the conductive plate 6 is driven to touch the second conductive column 3 and the third conductive column 4 at the same time, as shown in Figure 6, so that the first conductive column 2 is connected with the second conductive column 3 and the third conductive column at the same time. 4 Form an electrical connection and the two paths are conducted. At this time, the exhaust fan 20 also starts to work, and the blower 10 and the exhaust fan 20 work together to reduce the temperature in the central cabinet 300 .

After the temperature of the central cabinet 300 drops, the memory alloy spring 5 gradually shrinks, and first the conductive plate 6 is separated from the third conductive column 4 to realize a disconnection all the way. At this time, the exhaust fan 20 stops working, and after the temperature of the central cabinet 300 continues to drop , the conductive plate 6 is separated from the second conductive column 3 to realize two-way disconnection, and at this moment, the blower 10 and the exhaust fan 20 all stop working.

The central cabinet 300 can also be equipped with a current transformer 400, a wireless power transmission transmitting module 40, a wireless power transmission receiving module 50, and an outgoing busbar 500. The incoming busbar 100 is connected through the circuit breaker 200, the input end of the wireless power transmission transmitting module 40 is connected to the secondary side of the current transformer 400, the blower 10 and the exhaust fan 20 are connected to the wireless power transmission receiving module 50 through the temperature control switch 30, and the wireless power transmission receiving module 50 cooperates with the wireless power transmission transmitter module 40 to provide power to the blower 10 and the exhaust fan 20. This is more conducive to the location arrangement and line arrangement of the air blower 10, the exhaust fan 20, and the temperature control switch 30.

The temperature control switch of the present utility model also can be set to two, and one controls air blower 10, and another controls air exhauster 20.

The above is only a preferred embodiment of the utility model, and equivalent changes made by those skilled in the art according to the claims all fall within the protection scope of the present case.

Claims (9)

1. A temperature control device for a central cabinet, including a central cabinet provided with an incoming busbar and a circuit breaker, characterized in that: a blower is installed in the central cabinet, and the air outlet of the blower is aligned with the contact of the circuit breaker. An exhaust fan is installed on the side or top of the central cabinet, and a temperature control switch is installed inside the central cabinet. The blower and the exhaust fan are connected to the power supply through the temperature control switch. The memory alloy spring gradually elongates, the temperature control switch first starts the blower, and then starts the blower and exhaust fan at the same time; as the temperature in the central cabinet gradually decreases, the memory alloy spring gradually shrinks, and the temperature control switch The switch turns off the extractor first, then the blower. 2. A temperature control device for a central cabinet according to claim 1, characterized in that: the temperature control switch includes an insulating box, the right side of the insulating box is pierced with a first conductive column, and the left side of the insulating box is The second conductive column and the third conductive column are set on the side, the length of the part of the second conductive column in the insulating box is longer than the length of the part of the third conductive column in the insulating box, and the part of the second conductive column in the insulating box is set There is a retractable contact, the memory alloy spring and a conductive plate are sequentially installed in the insulating box, one end of the memory alloy spring is fixed to the right side of the insulating box, the other end of the memory alloy spring is fixed to the conductive plate, the first conductive An electrical connection is also formed between the post and the conductive plate through a wire, and the memory alloy spring elongates as the temperature rises so as to drive the conductive plate to move and touch the second conductive post or touch the second conductive post and the third conductive post at the same time. 3. A temperature control device for a central cabinet according to claim 2, characterized in that: the second conductive column includes a fixed sleeve with a stepped through hole in the middle, and the fixed sleeve is pierced through the insulating box body On the left side, the retractable contact is a stepped cylinder, one end of the retractable contact is in the stepped through hole of the fixed sleeve, the other end of the retractable contact extends out of the fixed sleeve and is in the insulating box, the fixed sleeve There is also a compression spring in the stepped through hole of the fixed sleeve, and a bolt is screwed to the end of the stepped through hole of the fixed sleeve away from the retractable contact. One end of the compression spring is on the retractable contact and the other end is on the bolt. . 4 . The temperature control device for a central cabinet according to claim 3 , wherein a concave hole is provided at one end of the retractable contact close to the compression spring, and one end of the compression spring is inserted into the concave hole. 5 . 5. The temperature control device of a central cabinet according to claim 2, characterized in that: when the total length of the memory alloy spring is extended to 3cm, it drives the conductive plate to touch the second conductive column; the memory alloy spring When the total length of the spring is extended to 4 cm, the conductive plate is driven to touch the second conductive column and the third conductive column at the same time. 6. A temperature control device for a central cabinet according to claim 2, wherein the insulating box is formed by connecting a left side panel, a right side panel, a front side panel, a rear side panel, a bottom panel and a top panel. A square body, the front side plate, the rear side plate, the bottom plate and the top plate are connected as one, the left side plate is locked to the front side plate and the rear side plate by screws, and the right side plate is also locked to the front side plate and the rear side plate by screws, the first The conductive post is passed through the right side plate, the second conductive post and the third conductive post are passed through the left side plate, and one end of the memory alloy spring is fixedly connected to the inner side of the right side plate. 7 . The temperature control device of a central cabinet according to claim 6 , wherein a mounting protrusion is respectively extended to both sides of the bottom plate, and a mounting hole is provided on the mounting protrusion. 7 . 8 . The temperature control device of a central cabinet according to claim 6 , wherein a plurality of ventilation holes are respectively provided on the front side plate and the rear side plate. 9 . 9. A temperature control device for a central cabinet according to any one of claims 1 to 8, characterized in that: a current transformer, a wireless power transmission transmitting module, and a wireless power transmission receiving module are also installed in the central cabinet and the outgoing busbar, the current transformer is installed on the outgoing busbar, the outgoing busbar is connected to the incoming busbar through a circuit breaker, the input terminal of the wireless power transmission transmitter module is connected to the secondary side of the current transformer, and the blower and exhaust fan pass through the temperature control The switch is connected to the wireless power transmission receiving module, and the wireless power transmission receiving module and the wireless power transmission transmitting module cooperate to provide power for the blower and the exhaust fan.