Protective structure for remote closing of high-voltage motor

Abstract

The utility model discloses a protection structure for remote closing of a high-voltage motor, which comprises a high-voltage motor main body, a fixed seat fixedly connected to the bottom of the high-voltage motor main body, and a control box fixedly mounted on the surface of the high-voltage motor main body, and is characterized in that a mounting groove is formed in the control box; a wiring terminal is fixedly mounted in the mounting groove, a top plate is fixedly connected to the top end of the interior of the mounting groove, a limiting rod is fixedly connected to the interior of the mounting groove, and a bottom plate and a base are slidably connected to the outer surface of the limiting rod. According to the utility model, the slidable bottom plate is arranged in the control box, after a cable and a wiring terminal in the control box are fixed, the top plate and the bottom plate tightly clamp the cable, so that the mounting groove can be sealed, the cable can be fixed, the cable is prevented from falling off from the wiring terminal under the traction of an external force, and the service life of the cable is prolonged. And the protection property and the safety are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a protection structure for remote closing of a high-voltage motor. Background Art

[0002] The control technology of the remote closing permission signal of the high-voltage motor is used to remotely control the conduction and disconnection of the closing circuit of the high-voltage motor switch cabinet. At present, the high-voltage motors mainly include motor equipment such as fans, water pumps, and belt conveyors. Due to the production process requirements of industrial and mining enterprises, some motors are started and stopped frequently, and multiple motors need to be switched with each other. There are many interlocking signals at the time of starting, such as interlocking signals between multiple motors, interlocking signals between motors and frequency converters, and so on. Therefore, the starting methods of high-voltage motors generally adopt two methods: local starting at the box next to the motor and remote starting by PLC. Regardless of which of the above starting methods is used, the "local / remote" conversion switch of the high-voltage switch cabinet must be switched to the "remote" position, so that the production process operators can operate the box next to the motor, or remotely start the motor by PLC. To prevent on-site personnel from operating incorrectly, after the high-voltage motor stops, the "local / remote" conversion switch of the high-voltage switch cabinet needs to be switched to the "local" position. Due to the dispersion of on-site equipment, operators need to constantly transfer between various equipment to send signals. Operators frequently run between various equipment, which adds many uncontrollable factors to the entire operation process. First, there is a risk of electric shock when contacting high-voltage electrical equipment in extreme weather; second, when operating the conversion switch, it is impossible to confirm whether there is a closing signal from the motor side box or PLC remote control. There are uncontrollable factors in power transmission, and the personal safety of operators cannot be guaranteed. Third, according to process requirements, some motors are started frequently, and operators frequently switch on and off signals, which increases the labor intensity of operators and is not conducive to improving production efficiency. The control technology of remote closing permission signal installed in the relay room of the high-voltage motor switch cabinet can be used to solve the problem of difficulty in switching on remote closing signals;

[0003] High-voltage motor remote closing controllers are often installed on the surface of the motor. When connecting the traditional high-voltage motor remote closing controller to the motor cable, the cable needs to be connected to the terminal inside the controller first. After the connection, it is difficult to seal the cable and the controller casing, which will cause the protective performance of the casing to decrease. It cannot effectively prevent dust, moisture and other foreign substances from entering the controller, affecting the stable operation of the closing controller. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a protective structure for remote closing of high-voltage motors, which solves the problem that when a traditional high-voltage motor remote closing controller is connected to a motor cable, the cable needs to be connected to the terminal inside the controller first. After the connection, it is difficult to seal the cable and the controller casing, which causes the protective performance of the casing to decline, and it is impossible to effectively prevent foreign substances such as dust and moisture from entering the controller, affecting the stable operation of the closing controller.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a protective structure for remote closing of a high-voltage motor, comprising a high-voltage motor body, a fixing seat fixedly connected to the bottom of the high-voltage motor body, and a control box fixedly installed on the surface of the high-voltage motor body, an installation groove is opened inside the control box, a wiring terminal is fixedly installed inside the installation groove, a top plate is fixedly connected to the top end of the installation groove, a limit rod is fixedly connected to the inside of the installation groove, the outer surface of the limit rod is slidably connected to the bottom plate and the base, a stepper motor is fixedly installed inside the control box, a resist wheel is fixedly connected to the output end of the stepper motor, steel balls are equidistantly and movably installed inside the resist wheel, and a limit plate is fixedly connected to the bottom of the base.

[0006] Preferably, a slide groove is provided on the surface of the fixed seat, a tooth groove is provided inside the slide groove, a sliding block is slidably connected inside the slide groove, a fixing hole is provided through the inner center of the sliding block, a tooth block is fixedly connected to the side of the sliding block, and an elastic block is fixedly connected to the top of the tooth block.

[0007] Preferably, the bottom plate and the top plate are both silicone plates, the bottom of the bottom plate is fixedly connected to the outer surface of the base, and the outer surfaces of the bottom plate and the base are both sealed and slidably connected to the inside of the control box.

[0008] Preferably, the surface of the wheel is rotatably connected to the bottom of the base, the surface of the steel ball extends to the outer surface of the wheel and is rollingly connected to the bottom of the base, and the output end of the stepper motor is fixedly connected to the eccentric position of the wheel.

[0009] Preferably, the shapes of the tooth groove and the tooth block match, and the surface of the tooth block is meshedly connected to the inside of the tooth groove.

[0010] Preferably, the elastic block and the tooth block are both slidably connected inside the tooth groove, the elastic block is a sponge block, and the upper surface of the elastic block abuts against the inner top of the tooth groove.

[0011] Beneficial Effects

[0012] The utility model provides a protection structure for remote closing of high-voltage motors. Compared with the prior art, it has the following beneficial effects:

[0013] 1. The protective structure of the remote closing of the high-voltage motor is provided with a sliding bottom plate inside the control box. After the cables are fixed to the wiring terminals inside the control box, the top plate and the bottom plate tightly clamp the cables, so that the installation groove can be sealed and the cables can be fixed at the same time to prevent the cables from falling off the wiring terminals due to external forces, thereby enhancing the protection and safety.

[0014] 2. The protective structure for remote closing of the high-voltage motor can flexibly adjust the position between the fixing seat and the connected equipment when fixing the high-voltage motor body by setting a slidable sliding block, so as to meet different installation requirements and make the installation more convenient and quick. The installer can more easily fix the high-voltage motor body in the required position by adjusting the position of the fixing hole. Through the flexible fixed installation method, it can ensure that the high-voltage motor body is firmly and reliably fixed in the predetermined position during the working process, avoiding the movement or tilting of the high-voltage motor body due to vibration or other reasons, thereby affecting the normal operation and safe operation of the high-voltage motor body, and enhancing the stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the control box in the utility model;

[0017] Figure 3 This is a schematic diagram of the connection between the base and the wheel in the utility model;

[0018] Figure 4 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 5 It is a structural schematic diagram of the sliding block in the utility model;

[0020] Figure 6 This is the control circuit wiring diagram in the utility model;

[0021] Figure 7 This is the switch quantity input diagram in the utility model;

[0022] Figure 8 This is the wiring diagram of the relay protection device of the utility model.

[0023] In the figure: 1. High-voltage motor body; 2. Fixed seat; 3. Control box; 4. Mounting slot; 5. Wiring terminal; 6. Top plate; 7. Bottom plate; 8. Base; 9. Limit rod; 10. Stepper motor; 11. Stop wheel; 12. Steel ball; 13. Limit plate; 14. Slide groove; 15. Tooth groove; 16. Sliding block; 17. Fixed hole; 18. Tooth block; 19. Elastic block. DETAILED DESCRIPTION

[0024] 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 in 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.

[0025] See also Figure 1-5 The utility model provides a technical solution: a protective structure for remote closing of a high-voltage motor, comprising a high-voltage motor body 1, a fixing seat 2 fixedly connected to the bottom of the high-voltage motor body 1, and a control box 3 fixedly installed on the surface of the high-voltage motor body 1, characterized in that: an installation slot 4 is provided inside the control box 3, a wiring terminal 5 is fixedly installed inside the installation slot 4, a top plate 6 is fixedly connected to the top of the inside of the installation slot 4, a limiting rod 9 is fixedly connected inside the installation slot 4, a bottom plate 7 and a base 8 are slidably connected on the outer surface of the limiting rod 9, both the bottom plate 7 and the top plate 6 are silicone plates, the bottom of the bottom plate 7 is fixedly connected to the outer surface of the base 8, the outer surfaces of the bottom plate 7 and the base 8 are both sealed and slidably connected to the inside of the control box 3, and a stepper is fixedly installed inside the control box 3 The motor 10, the output end of the stepper motor 10 is fixedly connected with a wheel 11, the surface of the wheel 11 is rotatably connected to the bottom of the base 8, the inside of the wheel 11 is equidistantly and movably installed with steel balls 12, the surface of the steel balls 12 extends to the outer surface of the wheel 11, and is rollingly connected to the bottom of the base 8, the output end of the stepper motor 10 is fixedly connected to the eccentric position of the wheel 11, and the bottom of the base 8 is fixedly connected to a limit plate 13, by arranging a slidable bottom plate 7 inside the control box 3, when the cable and the wiring terminal 5 inside the control box 3 are fixed, the top plate 6 and the bottom plate 7 tightly clamp the cable, so that the installation groove 4 can be sealed, and the cable can also be fixed at the same time, to prevent the cable from being pulled off from the wiring terminal 5 by external force, thereby enhancing protection and safety;

[0026] A slide groove 14 is provided on the surface of the fixed seat 2, a tooth groove 15 is provided inside the slide groove 14, a sliding block 16 is slidably connected inside the slide groove 14, a fixing hole 17 is provided at the inner center of the sliding block 16, a tooth block 18 is fixedly connected to the side of the sliding block 16, the shapes of the tooth groove 15 and the tooth block 18 match, the surface of the tooth block 18 is meshed and connected to the inside of the tooth groove 15, an elastic block 19 is fixedly connected to the top of the tooth block 18, the elastic block 19 and the tooth block 18 are both slidably connected to the inside of the tooth groove 15, the elastic block 19 is a sponge block, the upper surface of the elastic block 19 abuts against the inner top of the tooth groove 15, and a slidable The sliding block 16 can flexibly adjust the position between the fixing seat 2 and the connected equipment when fixing the high-voltage motor body 1 to meet different installation requirements, making the installation more convenient and quick. The installer can adjust the position of the fixing hole 17 to more easily fix the high-voltage motor body 1 at the desired position. Through a flexible fixed installation method, it can ensure that the high-voltage motor body 1 is firmly and reliably fixed at a predetermined position during the operation of the high-voltage motor body 1, avoiding the movement or tilt of the high-voltage motor body 1 due to vibration or other reasons, thereby affecting the normal operation and safe operation of the high-voltage motor body 1, and enhancing stability.

[0027] See also Figure 6-8The double-position double-coil relay is installed in the relay room of the high-voltage switch cabinet, and is installed on the dovetail groove together with the control circuit power circuit breaker and the signal circuit power circuit breaker. The control technology of the high-voltage motor remote closing permission signal is composed of a control circuit and a switch input circuit. The control circuit is used to control the conduction and disconnection of the closing circuit. The switch input circuit is used to monitor the state of the double-position double-coil relay. The control technology of the high-voltage motor 1 remote closing permission signal is to control the conduction and disconnection of the closing circuit of the high-voltage switch cabinet by controlling the two coils of the static double-position double-coil relay to be energized, thereby controlling the conduction and disconnection of the closing circuit of the high-voltage switch cabinet. Among them, KA1 and KA1 are the two coils of the static double-position double-coil relay. The KA1 coil is used to control the connection of the closing circuit permission signal. The KA1 coil is used to control the reset of the closing permission signal. T6.1 and T6.2 are the remote control outlets of the relay protection device, which are used to turn on the KA1 coil. T7.1 and T7.2 are the remote control outlets of the relay protection device, which are used to turn on the KA1 coil. The normally open points of KA1 are respectively It is connected in series in the closing circuit and the machine-side closing permission indicator light circuit to conduct the closing circuit and the machine-side closing permission signal circuit. The normally open point of KA1 is connected in series in the closing permission signal circuit to reset the closing permission signal. The relay coil is associated with the background monitoring system of the comprehensive protection device. The comprehensive protection export is remotely controlled by the background to achieve the closure of the normally open point of the double-position double-coil relay and the conduction of the signal circuit. The control technology of the remote closing permission signal of the high-voltage motor has the following advantages: the technical equipment is quick and easy to install, the control circuit wiring is simple, and it is easy to maintain; this technology adds a closing permission signal to the closing control circuit during normal startup, which does not affect the use of the test closing function during maintenance, nor does it affect the normal shutdown tripping and protection tripping functions; this technology greatly reduces the risks brought by personnel frequently entering and exiting the high-voltage room for operation, and at the same time reduces the labor intensity of personnel.

[0028] Before the high-voltage motor 1 is started, the high-voltage switch cabinet is in hot standby state. At this time, the 3SA "local / remote" conversion switch has been switched to the "remote" position. It is only necessary to send a closing permission signal in the integrated protection device monitoring background system to make T6.1 and T6.2 conductive, and the closing permission signal relay KA1 coil is energized. The closing circuit KA1 normally open point, the machine side closing permission signal KA1 normally open point, and the switch input closing permission signal KA1 normally open point are closed. Since the integrated protection device output 6 is a normally open point, the signal sent by the background system is a pulse signal, it is necessary to connect a KA1 normally open point in parallel between T6.1 and T6.2 for self-holding, so that the KA1 coil is always energized, and the KA1 normally open point is always in the closed state. At this time, the machine side box closing permission indicator light is on, the integrated protection device monitoring background system detects the remote signal 2 (S2) closing permission signal, and the closing circuit KA1 normally open point is closed, which meets the conditions for the machine side box to start the motor locally and the PLC to start the motor remotely.

[0029] To start the machine-side box locally, just turn the "machine-side / PLC" switch to the "machine-side" position, and then turn the "close / open" switch to start the motor. The integrated protection device monitoring background system detects the remote signal 6 (S6) machine-side closing signal.

[0030] PLC remote starting only requires turning the "machine side / PLC" conversion switch to the "PLC" position, and then the PLC host computer will give a start signal to complete the motor starting. The integrated protection device monitoring background system detects the remote signal 8 (S8) PLC closing signal.

[0031] When the motor is not allowed to be restarted after stopping, the closing signal needs to be disconnected. There are two ways at this time. One is to switch the 3SA "local / remote" conversion switch to the "local" position. The other is for the integrated protection device monitoring background system to send a closing reset pulse signal to make T7.1 and T7.2 conductive, allowing the closing reset signal relay KA1 coil to be energized, allowing the KA1 normally closed point in series in the closing signal circuit to be disconnected, allowing the closing signal relay KA1 coil to lose power, and all KA1 normally open points change from closed points to open points, and the control circuit is disconnected. If you need to start the motor again, just repeat the above process.

[0032] When installing the high-voltage motor body 1, place the fixing seat 2 in the specified position, and then push the sliding block 16 upward, the sliding block 16 drives the elastic block 19 to slide upward, at this time the elastic block 19 is in a compressed state, and then the sliding block 16 can slide inside the slide groove 14, after sliding the sliding block 16 to a suitable position, stop applying external force to the sliding block 16, at this time, through the elasticity of the elastic block 19, the tooth block 18 is engaged with the tooth groove 15, and then the bolt is passed through the fixing hole 17 to connect with the fixed part, when connecting the cable, after the cable is fixedly connected to the wiring terminal 5, the stepper motor 10 is started, the stepper motor 10 drives the wheel 11 to rotate, and the wheel 11 is abutted against the bottom of the base 8 to drive the base 8 and the bottom plate 7 to slide up and down, when the top of the bottom plate 7 abuts against the bottom of the top plate 6, the cable is sealed and clamped by the top plate 6 and the bottom plate 7, the installation groove 4 can be sealed, and the cable can also be fixed at the same time, to prevent the cable from falling off from the wiring terminal 5 due to external force, thereby enhancing protection and safety.

[0033] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A protective structure for remote closing of a high-voltage motor, comprising a high-voltage motor body (1), a fixing seat (2) fixedly connected to the bottom of the high-voltage motor body (1), and a control box (3) fixedly installed on the surface of the high-voltage motor body (1), characterized in that: The control box (3) is provided with a mounting groove (4) inside, a wiring terminal (5) is fixedly installed inside the mounting groove (4), a top plate (6) is fixedly connected to the top of the mounting groove (4), a limiting rod (9) is fixedly connected to the inside of the mounting groove (4), the outer surface of the limiting rod (9) is slidably connected to the bottom plate (7) and the base (8), a stepping motor (10) is fixedly installed inside the control box (3), the output end of the stepping motor (10) is fixedly connected to a stop wheel (11), steel balls (12) are equidistantly movably installed inside the stop wheel (11), and the bottom of the base (8) is fixedly connected to a limiting plate (13).

2. The protective structure for remote closing of a high-voltage motor according to claim 1 is characterized in that: A sliding groove (14) is provided on the surface of the fixed seat (2), a tooth groove (15) is provided inside the sliding groove (14), a sliding block (16) is slidably connected inside the sliding groove (14), a fixing hole (17) is provided through the center of the sliding block (16), a tooth block (18) is fixedly connected to the side of the sliding block (16), and an elastic block (19) is fixedly connected to the top of the tooth block (18).

3. The protective structure for remote closing of a high-voltage motor according to claim 1 is characterized in that: The bottom plate (7) and the top plate (6) are both silicone plates; the bottom of the bottom plate (7) is fixedly connected to the outer surface of the base (8); and the outer surfaces of the bottom plate (7) and the base (8) are both sealed and slidably connected to the inside of the control box (3).

4. The protective structure for remote closing of a high-voltage motor according to claim 1 is characterized in that: The surface of the wheel (11) is rotatably connected to the bottom of the base (8), the surface of the steel ball (12) extends to the outer surface of the wheel (11) and is rollingly connected to the bottom of the base (8), and the output end of the stepping motor (10) is fixedly connected to the eccentric position of the wheel (11).

5. The protective structure for remote closing of a high-voltage motor according to claim 2 is characterized in that: The shapes of the tooth groove (15) and the tooth block (18) match each other, and the surface of the tooth block (18) is meshedly connected to the inside of the tooth groove (15).

6. The protective structure for remote closing of a high-voltage motor according to claim 2, characterized in that: The elastic block (19) and the tooth block (18) are both slidably connected inside the tooth groove (15); the elastic block (19) is a sponge block, and the upper surface of the elastic block (19) abuts against the inner top of the tooth groove (15).

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