Switch cabinet bus connection monitoring device
By installing contact detection circuits and temperature monitoring devices at the busbar connection points of the switchgear, the problems of loose busbar connections and excessive temperature were solved, enabling timely alarms and fault prevention, and improving the safety of the switchgear.
Patent Information
- Application Number
- CN202520070743.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing switchgear busbars are prone to loosening at connection points and lack temperature monitoring, leading to the risk of electrical fires and the possibility of escalating faults.
A monitoring device comprising a contact detection circuit, a transmitting alarm circuit, and a receiving circuit was designed. It uses a pressure resistor and a temperature switch to monitor the stability and temperature of the bus connection points and alerts staff through wireless and audible/visual alarms.
It enables timely alarms for loose busbar connections and excessive temperatures, reducing the escalation of electrical faults and improving the safety and reliability of the equipment.
Smart Images
Figure CN223596911U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a joint device technical field especially a switch cabinet bus connection monitoring device. BACKGROUND
[0002] The switch cabinet bus is a conductor playing a key role in a complete switch cabinet, and its main function is to connect various electrical equipment between cabinets and in the cabinet to realize the collection, distribution and transmission of electric energy. The bus plays an important role in the switch cabinet, similar to the blood vessels of the human body, continuously delivering power to various devices. The types of bus include rectangular, circular (or double D-shaped) and grooved. When the cross-sectional area of the bus is the same, the rectangular bus has a larger circumference, better heat dissipation effect and cooling conditions, and at a certain allowable temperature, the current passing through the rectangular bus is larger than that of the circular bus, so the complete switch cabinet generally uses rectangular bus. The material of the bus usually includes copper, aluminum and steel. Copper has the highest conductivity and the largest current-carrying capacity under the same cross-sectional area; while steel has lower conductivity and is commonly used in PT loop or lightning arrester loop.
[0003] Although the existing bus used in switch cabinets and the like meets the power supply needs to some extent, there are still some technical defects due to the structure. First, when the fixed part is not rotated in place due to the installation technology of the staff or other factors, there is a probability of looseness between the bus connection parts, which will adversely affect the normal power supply of the electrical equipment and increase the probability of electrical fire caused by electric arc. Second, it does not have a temperature monitoring function, so when the electrical load is too large or short-circuited, the relevant management personnel cannot handle it in the first time, and there is a probability of fault expansion. In summary, it is particularly necessary to provide a device that can prompt the relevant management personnel to handle it in time when looseness occurs between the bus connection parts and the temperature is too high. UTILITY MODEL CONTENTS
[0004] In order to overcome the drawbacks of the existing switch cabinet bus due to the structure, the utility model provides a switch cabinet bus connection monitoring device that can monitor the stability and temperature between the bus connection parts under the joint action of the relevant mechanism, and can issue an alarm sound in the first time when the connection part is loose and the temperature is too high, so that the relevant management personnel can timely maintenance, reducing the probability of electrical fault expansion.
[0005] The technical solution adopted by the utility model to solve its technical problems is:
[0006] The utility model provides a switchgear bus connection monitoring device, including contact detection circuit, launch alarm circuit, receiving circuit, contact detection circuit has a plurality of ways, and each way contact detection circuit is equipped with pressure resistance, and pressure resistance is sealedly installed in the insulating flexible cover, and the joint part side of bus has the installation groove, and the installation groove side end has the wire groove, and the rubber sleeve of pressure resistance is installed in the installation groove, and after the other bus and the joint part of bus are fixed, the other bus rear side end contacts the rubber sleeve front side end of pressure resistance, the launch alarm circuit is installed in the element box, and the element box is fixedly installed in the switchgear, and each way contact detection circuit is installed in the shell, and the shell is installed in the rear outside end of bus joint, and the power input end of launch alarm circuit and the power output end of a plurality of contact detection circuits are electrically connected.
[0007] Further, the contact detection circuit comprises resistors, transistors and relays connected in an electrically connected manner, and a temperature switch connected with the pressure resistor, one end of the first resistor is connected with the positive power input end and the control power input end of the relay and one end of the temperature switch, one end of the pressure resistor is connected with the other end of the first resistor and one end of the second resistor, the other end of the second resistor is connected with the base of the transistor and one end of the third resistor, the other end of the third resistor is connected with the other end of the temperature switch, and the other end of the pressure resistor is connected with the emitter of the transistor.
[0008] Further, the temperature switch is a snap type normally open contact temperature switch, and the heated surface of the temperature switch contacts the outside end of the bus joint.
[0009] Further, the launch alarm circuit comprises a wireless transmission circuit module and a siren connected in an electrically connected manner, the positive power input end and the negative power input end of the siren are connected with the positive and negative power input ends of the wireless transmission circuit module respectively, and the two contact ends of one wireless signal transmission button of the wireless transmission circuit module are connected together.
[0010] Further, the receiving circuit comprises a wireless receiving circuit module and a siren connected in an electrically connected manner, the positive power input end of the siren is connected with the power output end of the wireless receiving circuit module, and the negative power input end of the wireless receiving circuit module is connected with the negative power input end of the siren.
[0011] Compared with the prior art, the utility model has the beneficial effects that: the contact detection circuit can monitor the stability and temperature between the bus connection parts, can alarm and prompt the on-site staff in the first time when the bus connection parts are loose and the temperature exceeds the standard, can also prompt the personnel in the duty room through the wireless alarm mode, the relevant management personnel can open the cabinet door of the switch cabinet in time and maintain the inside, and the probability of electrical fault expansion is reduced. In conclusion, the utility model has good application prospect. BRIEF DESCRIPTION OF DRAWINGS
[0012] The utility model will be further explained in connection with the drawings and examples.
[0013] Figure 1 It is the whole and partial enlarged structure schematic diagram of the utility model.
[0014] Figure 2 It is the partial structure schematic diagram of the utility model.
[0015] Figure 3 、 4 It is the circuit diagram of the utility model. Specific implementation
[0016] Figure 1 、 2 , 3, 4 show, a switchgear bus connection monitoring device, including power module W1, still have contact detection circuit 1, launch alarm circuit 2, receiving circuit 3, contact detection circuit 1 has multiple ways, and the number of ways of contact detection circuit 1 and the number of bus joint 5 parts of switchgear are identical, every way contact detection circuit is equipped with a pressure resistance RT, and the pressure resistance RT sealing cover is in an insulating flexible rubber sleeve 41, the joint part 51 right side of bus 5 has a recessed mounting groove 52, and the mounting groove side end has a wire slot 53, and the rubber sleeve 41 rear side end of pressure resistance RT is glued together and installed in mounting groove 52, another bus 6 and the joint part 51 of bus are fixed by bolt, and the other bus 6 rear side end is closely contacted with the rubber sleeve 41 front side end of pressure resistance RT (the wire of connecting pressure resistance RT is glued and insulated and adhered in wire slot 53, to prevent the wire from being broken), the power module W1, launch alarm circuit 2 are installed in component box 7, and component box 7 is fixedly installed in switchgear, every way contact detection circuit 1 is installed in a shell 101, and the insulating shell 101 is fixedly installed (such as glued) in the rear outside end of bus joint 51, receiving circuit 3 is installed in the duty room electric control box.
[0017] Figure 1 、 2The contact detecting circuit includes resistors R1, R2, R3, a transistor Q1 and a relay J1, a temperature switch W, and is connected with the pressure resistor RT through wires. There is an opening on the front outer side of the shell 101, and the heated surface of the temperature switch RT is located outside the opening. One end of the first resistor R1 is connected with the positive power input end and the control power input end of the relay J1 and one end of the temperature switch W. One end of the pressure resistor RT is connected with the other end of the first resistor R1 and one end of the second resistor R2. The other end of the second resistor R2 is connected with the base of the transistor Q1 and one end of the third resistor R3. The other end of the third resistor R3 is connected with the other end of the temperature switch W. The other end of the pressure resistor RT is connected with the emitter of the transistor Q1. The temperature switch W is a snap type normally open contact temperature switch, and the heated surface of the temperature switch W contacts the rear outer side of the bus joint. The transmitting alarm circuit includes a wireless transmitting circuit module W2 and a siren BX connected through the circuit board. The positive power input end and the negative power input end of the siren BX are respectively connected with the positive power input end 1 and the negative power input end 2 of the wireless transmitting circuit module W2. The first wireless signal transmitting button S1 of the wireless transmitting circuit module W2 is connected with the two contact ends. Figure 3 、 4As shown, the power module W1, W3 is AC 220V to DC 12V power module finished product; the sounder BX, BX1 is the type FM12V active continuous sound alarm finished product; the triode Q1 type is 9013 (NPN); the resistance R1, R2, R3 resistance is 24K, 12K, 12K respectively; the temperature switch W is the type KSD301 snap 60℃ normally open contact temperature switch; the pressure resistance RT is the type 120-5AA pressure strain gauge; the wireless transmitting circuit module W2, the wireless receiving circuit module W4 is the type TX315B1 wireless transmitting and receiving circuit module assembly finished product (and the wireless remote control and receiving assembly structure and working principle are consistent);The relay J1 type is DC12V.
[0018] Figure 1 、 2, 3, 4, the AC 220V power into the power module W1 power input, power module W1 power output 3, 4 pin output stable DC 12V power into the power input of the multi-channel contact detection circuit; AC 220V power into the power module W3 power input, power module W3 power output 3, 4 pin output stable DC 12V power into the power input of the wireless receiving circuit module W4. In the multi-channel contact detection circuit, when the stability between the corresponding position bus connection parts is good (that is, the other bus 6 and the joint part 51 of the bus are fixed by bolts, etc., and the rear end of the other bus 6 tightly contacts the front end of the rubber sleeve 41 of the pressure resistance RT), the pressure resistance RT receives relatively large pressure on the force surface, and its resistance value is relatively low, the voltage between the pressure resistance RT and the resistance R1 is low, the 12V power is divided between the resistance R1 and the pressure resistance RT, and then is divided by the resistance R2 to reduce the current to below 0.7V at the base of the transistor Q1. The transistor Q1 will not be turned on, so the wireless transmitting circuit module W2 and the buzzer BX will not work. When the stability between the corresponding position bus connection parts is not good due to various reasons (that is, the bolts between the other bus 6 and the joint part 51 of the bus are loose, and the rear end of the other bus 6 no longer tightly contacts the front end of the rubber sleeve 41 of the pressure resistance RT), the pressure resistance RT receives relatively small pressure on the force surface, and its resistance value is relatively high, the voltage between the pressure resistance RT and the resistance R1 is high, the 12V power is divided between the resistance R1 and the pressure resistance RT, and then is divided by the resistance R2 to reduce the current to above 0.7V at the base of the transistor Q1. The transistor Q1 will be turned on, and the low-level output at the collector electrode enters the negative power input terminal of the relay J1, the relay J1 is attracted to close the control power input terminal and the normally open contact terminal, so the wireless transmitting circuit module W2 and the buzzer BX will work. In the multi-channel contact detection circuit, when the temperature of the corresponding position bus joint does not exceed the standard (such as below 60℃), the temperature switch W is open, and the transistor Q1 will not be turned on, so the wireless transmitting circuit module W2 and the buzzer BX will not work. When the temperature of the corresponding position bus joint exceeds the standard (such as above 60℃), the temperature switch W is closed, the 12V power enters the base of the transistor Q1 through the temperature switch W and the resistance R3 (for reducing current), the transistor Q1 will be turned on, and the low-level output at the collector electrode enters the negative power input terminal of the relay J1, the relay J1 is attracted to close the control power input terminal and the normally open contact terminal, so the wireless transmitting circuit module W2 and the buzzer BX will work.
[0019] Figure 1 、 2When the busbar 6 and the joint part 51 of the busbar are loose or over-temperature, the wireless transmitting circuit module W2 and the buzzer BX are powered, and the first transmitting button S1 of the wireless transmitting circuit module W2 is connected to the two contacts, so that the wireless transmitting circuit module W2 transmits the first wireless closing signal, and the buzzer BX is powered to sound, prompting the on-site staff to timely repair. After the wireless transmitting circuit module W2 transmits the first wireless closing signal and the wireless receiving circuit module W4 receives the signal, the 3-pin of the wireless receiving circuit module W4 outputs a high level to the positive power input end of the buzzer BX1, so that the buzzer BX1 is powered to sound, prompting the on-site staff to timely repair. Through the above, when the busbar connection part is loose and the temperature exceeds the standard, the new type can alarm and prompt the on-site staff in the first time, and can also prompt the staff in the duty room through the wireless alarm mode, so that the relevant management personnel can open the cabinet door of the switch cabinet and repair and maintain the inside of the cabinet, thereby reducing the probability of electrical fault expansion.
[0020] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is limited to the details of the above-described exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present application.
[0021] In addition, it should be understood that, although the present application is described in the form of embodiments, the embodiments do not contain only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A switchgear busbar connection monitoring device, comprising a contact detection circuit, a transmitting alarm circuit, and a receiving circuit; characterized in that, The contact detection circuit has multiple channels, each equipped with a pressure resistor. The pressure resistor is sealed and installed in an insulating flexible sleeve. There is a mounting groove on one side of the busbar joint, and a wire groove at the end of the mounting groove. The rubber sleeve of the pressure resistor is installed in the mounting groove. After the other busbar and the busbar joint are fixed, the rear end of the other busbar contacts the front end of the rubber sleeve of the pressure resistor. The transmitting alarm circuit is installed in a component box, which is fixedly installed in the switch cabinet. Each contact detection circuit is installed in a housing, which is installed on the rear outer end of the busbar joint. The receiving circuit is installed in the duty room. The power input terminal of the transmitting alarm circuit is electrically connected to the power output terminal of the multiple contact detection circuits.
2. The switchgear busbar connection monitoring device according to claim 1, characterized in that, The contact detection circuit includes an electrically connected resistor, transistor, relay, and temperature switch, and is connected to a pressure resistor. One end of the first resistor is connected to the positive power input terminal and control power input terminal of the relay, and one end of the temperature switch. One end of the pressure resistor is connected to the other end of the first resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the transistor. One end of the third resistor is connected to the other end of the temperature switch. The other end of the pressure resistor is connected to the emitter of the transistor.
3. The switchgear busbar connection monitoring device according to claim 2, characterized in that, The temperature switch is a snap-action normally open contact temperature switch, and the heated surface of the temperature switch contacts the outer end of the bus joint.
4. The switchgear busbar connection monitoring device according to claim 1, characterized in that, The alarm transmission circuit includes a wireless transmission circuit module and a buzzer that are electrically connected. The positive and negative power input terminals of the buzzer are connected to the positive and negative power input terminals of the wireless transmission circuit module, respectively. The two contact terminals under one of the wireless signal transmission buttons of the wireless transmission circuit module are connected together.
5. A switchgear busbar connection monitoring device according to claim 1, characterized in that, The receiving circuit includes a wireless receiving circuit module and a buzzer that are electrically connected. The positive power input terminal of the buzzer is connected to the power output terminal of the wireless receiving circuit module, and the negative power input terminal of the wireless receiving circuit module is connected to the negative power input terminal of the buzzer.