CN215009968U - Motor protection structure of tamping tool - Google Patents
Motor protection structure of tamping tool Download PDFInfo
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- CN215009968U CN215009968U CN202022182337.2U CN202022182337U CN215009968U CN 215009968 U CN215009968 U CN 215009968U CN 202022182337 U CN202022182337 U CN 202022182337U CN 215009968 U CN215009968 U CN 215009968U
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Abstract
The utility model provides a motor protection structure of tamping tool relates to motor protection technical field, and the motor damages when can avoiding faults such as undervoltage, overload, overflowing. The motor protector comprises a lead module and a motor protector, wherein after the motor protector is connected to a contactor by the lead module, the contactor is connected with an air switch, the air switch is connected with a power supply, and the power supply, the air switch, the contactor, the motor protector and a motor form a current loop; the maximum current value of the motor protector is smaller than the rated current of the air switch, so that the motor protector provides primary protection for the motor, and the air switch and the contactor provide secondary protection for the motor. The utility model discloses the power of well motor is introduced from between air switch and the contactor, still increases motor protector at the front end of contactor, and motor protector can protect the motor when lacking the looks operation, and air switch and motor protector can protect the motor jointly when transshipping, avoid causing the motor to damage.
Description
Technical Field
The utility model relates to a motor protection field especially relates to a motor protection structure of tamping tool.
Background
The tamping coke oven refers to a side-mounted coke oven for charging coal and coking by a tamping method, and the tamping coke generally refers to the generation of coke in a special oven type for the tamping coke by adopting a tamping coking technology. The tamping coking process is that a tamping machine is adopted outside a coking furnace, coking blending coal is tamped into a coal cake slightly smaller than a coking chamber according to the size of the coking chamber, and the coal cake is pushed into the coking chamber from the side surface of the coking chamber to be subjected to high-temperature carbonization. The mature coke is pushed out from the carbonization chamber by a tamping coke pusher, is sent to a coke quenching tower by a coke guide and a coke quenching car, is put on a coke cooling platform after being extinguished by water, and is conveyed by an adhesive tape and is separated into commercial coke with different grain sizes by a coke screening.
The tamping machine for tamping coke oven is an intensive row hammer tamping machine which is generally formed by connecting a plurality of three hammer tamping units in series and is matched with hydraulic and electric centralized control. For example: the method is characterized in that a 21-hammer micro-mobile tamping machine is adopted, 7 groups of tamping trolleys are respectively installed, each group of tamping trolleys is provided with 3 tamping hammers, 7 tamping unit units corresponding to the 7 groups of tamping trolleys are connected in series, and each tamping unit consists of a moving mechanism, a hydraulic system and an electric control device.
In the tamping process, the motor rotates and transmits the rotation to the triple gear through the speed reducer, then the eccentric wheel connected with the shaft is driven to rotate, and the tamping hammer is thrown upwards under the clamping of the salient points of the eccentric wheel. Within the range of the working angle outside the salient points of the eccentric wheel, the tamping hammer freely falls down by the self mass to realize impacting and tamping the coal cakes. In the daily use process, the phenomenon that the motor is damaged due to phase loss and overload sometimes occurs when the motor runs.
In view of the above, there is a need for an improved motor protection module in the prior art to solve the problem of motor damage.
SUMMERY OF THE UTILITY MODEL
The utility model provides a motor protection architecture of tamping tool, the power of motor is introduced from between air switch and the contactor, still increases motor protector at the front end of contactor, and motor protector can protect the motor when lacking the looks operation, and air switch and motor protector can protect the motor jointly when transshipping, avoid causing the motor to damage.
Realize the utility model discloses the technical scheme of purpose as follows:
a motor protection structure of a tamping machine comprises a lead module and a motor protector, wherein after the motor protector is connected into a contactor by the lead module, the contactor is connected with an air switch, the air switch is connected with a power supply, and the power supply, the air switch, the contactor, the motor protector and a motor form a current loop;
the maximum current value of the motor protector is smaller than the rated current of the air switch, so that the motor protector provides primary protection for the motor, and the air switch provides secondary protection for the motor;
the contactor is connected with the air switch, and the contactor does not provide protection for the motor.
The utility model discloses a power of motor is introduced from between air switch and the contactor, still increases motor protector at the front end of contactor, and motor protector can protect the motor when lacking the looks operation, and air switch and motor protector can protect the motor jointly when transshipping, avoid causing the motor to damage.
As a further improvement of the present invention, the motor protector includes a thermal overload relay, and the current flows through the thermal overload relay and to the motor;
the maximum current value of the motor protector is the critical current of the thermal overload relay fusing;
when the current is overload current and exceeds critical current, the thermal overload relay is disconnected.
As a further improvement of the present invention, the thermal overload relay includes a thermomagnetic trip mechanism and a relay body, and the thermomagnetic trip mechanism is connected to a contact of the relay body;
and overload current flows through the current loop, the thermal magnetic tripping mechanism is separated, so that the contact of the thermal overload relay is disconnected, and then the thermal overload relay is disconnected, so that primary protection is provided for the motor.
As a further improvement of the present invention, the air switch and the motor protector are all close to the motor installation.
The utility model discloses all be close to the motor installation to air switch and motor protector, wiring between both being convenient for motor, air switch and the motor protector can utilize space installation air switch and the motor protector between motor and other equipment again, has simple to operate, the convenient advantage of wiring.
As a further improvement of the present invention, the air switch is used as a switch of the motor, and the motor is started very rarely.
The utility model discloses an air switch both as the second grade protection of motor, acts as the switch of motor again, is applicable to the occasion that the motor started very little.
As a further improvement of the utility model, the motor protector is in the motor appears overflowing, undercurrent, open phase, stifled commentaries on classics, short circuit, excessive pressure, under-voltage, electric leakage, unbalanced three phase, overheated, ground connection, bearing wear, stator and rotor eccentricity, protection when the winding is ageing.
As a further improvement of the present invention, when the protection of the motor protector fails, the air switch is right the motor provides secondary protection.
As a further improvement of the present invention, the power supply is a power distribution cabinet, and the air switch and the motor protector are both fixedly arranged in the power distribution cabinet;
the power distribution cabinet is installed close to the motor.
As a further improvement of the present invention, the lead module includes:
one end of the first lead is connected with a positive wiring column of the air switch, and the other end of the first lead is connected with a positive wiring terminal of the motor protector;
and one end of the second lead is connected with a negative binding post of the air switch, and the other end of the second lead is connected with a negative binding post of the motor protector.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses the power of well motor is introduced from between air switch and the contactor, still increases motor protector at the front end of contactor, and motor protector can protect the motor when lacking the looks operation, and air switch and motor protector can protect the motor jointly when transshipping, avoid causing the motor to damage.
2. The utility model discloses all be close to the motor installation to air switch and motor protector, wiring between both being convenient for motor, air switch and the motor protector can utilize space installation air switch and the motor protector between motor and other equipment again, has simple to operate, the convenient advantage of wiring.
3. The utility model discloses an air switch both as the second grade protection of motor, acts as the switch of motor again, is applicable to the occasion that the motor started very little.
Drawings
Fig. 1 is a schematic block diagram of a motor protection structure of the tamping machine of the present invention;
FIG. 2 is a schematic block diagram of a motor protection structure of a conventional tamper;
FIG. 3 is a diagram comparing the motor protection structure of the present invention with a conventional motor protection structure;
fig. 4 is a schematic block diagram of a motor protector.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
The common tamping machine is a multi-hammer mobile tamping system consisting of 7 tamping unit sets which are connected in series, a mobile mechanism, a hydraulic system and an electric control device system, and a hydraulic source and a power source need to be additionally and independently arranged. And the 7 tamping unit units are supported on the guide rail by four fixed double-edge wheels, so that the tamping unit units can be moved and replaced conveniently during maintenance.
Referring to fig. 1 and 3, the utility model provides a motor protection structure of a tamping machine, which comprises a lead module and a motor protector, wherein after the motor protector is connected to a contactor by the lead module, the contactor is connected with an air switch, the air switch is connected with a power supply, and the power supply, the air switch, the contactor, the motor protector and a motor form a current loop; the maximum current value of the motor protector is smaller than the rated current of the air switch, so that the motor protector provides primary protection for the motor, and the air switch and the contactor provide secondary protection for the motor.
The utility model discloses a lead wire module includes first lead wire and second lead wire, one end of first lead wire is connected with the positive terminal of air switch, the other end of first lead wire is connected with the positive terminal of motor protector; one end of the second lead is connected with a negative binding post of the air switch, and the other end of the second lead is connected with a negative binding post of the motor protector.
The utility model discloses a power of motor is introduced from between air switch and the contactor, still increases motor protector at the front end of contactor, and motor protector can protect the motor when lacking the looks operation, and air switch and motor protector can protect the motor jointly when transshipping, avoid causing the motor to damage.
The utility model discloses a tamping tool comprises mechanisms such as hammer mechanism, hammer stem, the mechanism that stops hammering, drive speed change mechanism, guider, drier oil lubricating system of carrying. The hammer rod is clamped by the raised outer edge of the elastic eccentric wheel, the hammer rod is lifted along with the rotation of the eccentric wheel, the hammer rod freely falls on the coal surface at the non-raised outer edge, and 3 groups of hammer rods of each group of the tamping machines alternately act to realize continuous operation. In practical use, the grounding phenomenon of the motor of the tamping machine appears for many times. The motor of the tamping machine adopts a horizontal planetary cycloidal pinwheel speed reducer, and the connection mode is a motor direct insertion type. When the sealing ring at the end of the motor shaft is damaged, lubricating oil in the speed reducer flows into the motor, and the motor is grounded. In addition, the motor drives the speed reducer to drive the tamping machine to work, and the normal work of the motor can ensure that a brake connected with the motor ensures that the tamping machine is accurately stopped.
Referring to fig. 2, when a motor of an original tamping machine is installed, a contactor is arranged on the motor, the tripping current of the contactor is 630A, and each motor is protected from motor faults through the contactor.
The general tamping tool needs to be equipped with a power supply during installation, the power supply is a low-voltage distribution box, and the low-voltage distribution box is combined electrical equipment formed by installing switching equipment, measuring instruments, protection devices, auxiliary equipment and the like required by a low-voltage circuit in a metal cabinet and is used for controlling, protecting, metering, distributing, monitoring and the like. The utility model discloses low voltage distribution box mainly has the effect in two aspects: firstly, carry out distribution and control to consumer, secondly when overload, short circuit and electric leakage appear in the circuit, provide power-off protection. Therefore, the utility model discloses the motor carries out tertiary protection, and the motor protector protection as the first order is protected, and the air switch protection as the second level is protected as the low voltage distribution box protection of third level. The utility model discloses an air switch, relay, motor protector, low voltage distribution box protect the motor jointly, avoid causing the motor to damage.
The embodiment of the utility model provides an in choose the motor protector for use, its effect is for the comprehensive protection control of motor, appear overflowing at the motor, undercurrent, open-phase, stifled commentaries on classics, short circuit, excessive pressure, under-voltage, electric leakage, unbalanced three-phase, overheated, ground connection, bearing wear, stator-rotor when eccentric, the winding is ageing to report to the police or protection control. The motor protector is based on the principle of detecting the change of line current (including sampling, positive sequence, negative sequence, zero sequence and overcurrent), and can detect phase failure or overload signals. Besides the function of phase failure protection, the device also has the functions of overload and locked rotor protection. The motor protector integrates protection, remote measurement, communication and remote control into a whole, realizes protection when faults of phase failure, overload, short circuit, undervoltage, overvoltage, electric leakage and the like occur to a motor, also has the functions of current and voltage display, time control, incoming call self-recovery, self-starting sequence, fault memory, auto lock, remote transmission alarm and the like, and is provided with an RS485 communication interface to realize computer networking. Meanwhile, the functions of monitoring and supervising the work of the motor and the like can be realized.
In some embodiments, the motor protector includes a thermal overload relay through which current flows and to the motor; the maximum current value of the motor protector is the critical current of the thermal overload relay fusing; when the current is overload current and exceeds the critical current, the thermal overload relay is disconnected. The thermal overload relay is one with current heat effect principle and electrician's thermosensitive bimetal sheet as sensitive element, and the said thermosensitive bimetal sheet is made of two kinds of alloy with great linear expansion coefficient difference through heating and rolling. When heated, the bimetallic strip bends from the high expansion layer (active layer) to the low expansion layer (passive layer). When the current is too large (exceeds the setting value), the element acts due to heat, and the linked break contact cuts off the power supply of the controlled circuit and the protected equipment.
Preferably, the thermal element of the thermal overload relay is connected directly or via a current transformer to the motor circuit. When the motor is overloaded, the main bimetallic strip is heated to the action temperature, so that the relay acts, the power circuit of the motor is switched off, and the motor is prevented from being damaged due to overload. The action time of the thermal overload relay and the magnitude of the overload current change according to the relation of inverse time limit, therefore, the thermal characteristic of the thermal overload relay is easy to be matched with the thermal characteristic of the motor, and the thermal overload relay has the characteristics of simple structure, low price, stable action performance, convenient use and the like.
In a special embodiment, the thermal overload relay comprises a thermomagnetic trip mechanism and a relay body, wherein the thermomagnetic trip mechanism is connected with a contact of the relay body; the current loop flows through overload current, the thermomagnetic tripping mechanism is separated to disconnect the contact of the thermomagnetic overload relay, and then the thermomagnetic overload relay is disconnected, so that primary protection is provided for the motor.
The thermomagnetic tripping mechanism provided by the embodiment of the utility model can be a thermal tripping mechanism or a magnetic tripping mechanism, and when the thermal tripping mechanism is electrically connected, the magnetic tripping mechanism arranged on the relay body is idle; when the magnetic tripping mechanism is electrically connected, the thermal tripping mechanism arranged on the relay body is idle. The utility model discloses thermomagnetic tripping device contains two functions of thermal tripping, electromagnetism dropout. The thermal tripping is realized by pushing a tripping transmission mechanism through the overcurrent delayed heating deformation of a bimetallic strip; the magnetic trip is formed by instantaneously pushing the armature to drive the trip through the short-circuit current of the electromagnetic coil.
The thermal tripping mechanism is made by adopting the principle that the thermal expansion of the bimetal is different, when the current exceeding the set value flows through the bimetal thermal tripping device, the bimetal heats and expands, but the bimetal is disconnected due to different expansion coefficients, and the thermal tripping mechanism is disconnected due to the fact that the thermal tripping device is connected with the circuit breaker body in series, and the motor protector is disconnected, so that the motor can be continuously protected once only by replacing a new motor protector. It should be noted that, since the thermal trip mechanism generally directly flows through the loop current, and the action current of the thermal trip mechanism is greatly influenced by the ambient temperature, the thermal trip mechanism is suitable for a low-voltage electrical loop in which the current dialing of the motor is not very large and the overcurrent protection is not very sensitive.
Referring to fig. 4, the thermomagnetic trip mechanism according to the embodiment of the present invention is preferably an electronic trip mechanism, and the electronic trip mechanism adopts an electronic logic board manner, and when the current flowing through the electronic trip mechanism exceeds a setting value, the logic circuit sends a signal to turn off the component. The electronic tripping mechanism is a circuit formed by electronic elements, and the circuit comprises a detection circuit, an amplifying circuit, a processing chip and an executing piece for pushing the tripping mechanism to act. When the detection circuit detects that the current flowing through the motor protector is overloaded, the detection circuit amplifies a current overload signal through an amplifying circuit signal and sends the amplified signal to the processing chip, the processing chip sends a signal to the executive part, the executive part disconnects the electronic tripping mechanism, the motor protector stops working after the electronic tripping mechanism is disconnected, and the motor also stops supplying power.
Preferably the utility model discloses air switch and motor protector all are close to the motor installation. The utility model discloses all be close to the motor installation to air switch and motor protector, wiring between both being convenient for motor, air switch and the motor protector can utilize space installation air switch and the motor protector between motor and other equipment again, has simple to operate, the convenient advantage of wiring.
It should be noted that, in the situation that the tamper is not frequently opened and closed, the air switch can be used as the switch of the motor, and at this time, the motor is rarely started. The utility model discloses an air switch both as the second grade protection of motor, acts as the switch of motor again, is applicable to the occasion that the motor started very little.
In the in-service use, the utility model discloses motor protector protects when the condition such as overcurrent, undercurrent, open phase, locked rotor, short circuit, excessive pressure, under-voltage, electric leakage, unbalanced three-phase, overheated, ground connection, bearing wear, stator and rotor eccentricity, winding ageing appear in the motor. The air switch and contactor provide secondary protection to the motor when the motor protector protection fails.
Preferably, the power supply of the embodiment of the utility model is a power distribution cabinet, and the air switch and the motor protector are both fixedly arranged in the power distribution cabinet; this switch board is preferably low-voltage distribution cabinet, and low-voltage distribution cabinet is close to the motor installation, and the purpose that sets up like this is the motor wiring of being convenient for.
It should be noted that the lead module of the embodiment of the present invention includes a first lead and a second lead, one end of the first lead is connected to the positive terminal of the air switch, and the other end of the first lead is connected to the positive terminal of the motor protector; one end of the second lead is connected with a negative binding post of the air switch, and the other end of the second lead is connected with a negative binding post of the motor protector.
The utility model discloses install motor protector additional at the contactor rear end, judge the operating current condition. A Xinling motor protector is adopted on site, fault protection is achieved for overload, unbalanced three-phase current, phase failure, overvoltage, undervoltage, short circuit and the like, and if the fault occurs, a contactor is cut off instantly to protect a motor.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A motor protection structure of a tamping machine is characterized by comprising a lead module and a motor protector, wherein after the lead module connects the motor protector into a contactor, the contactor is connected with an air switch, the air switch is connected with a power supply, and the power supply, the air switch, the contactor, the motor protector and a motor form a current loop;
the maximum current value of the motor protector is smaller than the rated current of the air switch, so that the motor protector provides primary protection for the motor, and the air switch provides secondary protection for the motor.
2. The motor protection structure of claim 1, wherein the motor protector includes a thermal overload relay, the current flowing through the thermal overload relay and to the motor;
the maximum current value of the motor protector is the critical current of the thermal overload relay fusing;
when the current is overload current and exceeds critical current, the thermal overload relay is disconnected.
3. The motor protection structure according to claim 2, wherein the thermal overload relay includes a thermomagnetic trip mechanism and a relay body, the thermomagnetic trip mechanism being connected with contacts of the relay body;
and overload current flows through the current loop, the thermal magnetic tripping mechanism is separated, so that the contact of the thermal overload relay is disconnected, and then the thermal overload relay is disconnected, so that primary protection is provided for the motor.
4. The motor protection structure of claim 1, wherein said air switch and said motor protector are both mounted proximate to said motor.
5. The motor protection structure according to any one of claims 1 to 4, wherein the air switch is a switch of the motor, and the motor is rarely started.
6. The motor protection structure according to any one of claims 1 to 4, wherein the motor protector protects the motor from overcurrent, undercurrent, phase loss, stalling, short circuit, overvoltage, undervoltage, leakage, three-phase imbalance, overheating, grounding, bearing wear, stator and rotor eccentricity, and winding aging.
7. The motor protection arrangement according to any one of claims 1-4, wherein the air switch provides secondary protection to the motor in the event of a protection failure of the motor protector.
8. The motor protection structure of claim 1, wherein the power supply is a power distribution cabinet, and the air switch and the motor protector are both fixedly arranged in the power distribution cabinet;
the power distribution cabinet is installed close to the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182337.2U CN215009968U (en) | 2020-09-29 | 2020-09-29 | Motor protection structure of tamping tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182337.2U CN215009968U (en) | 2020-09-29 | 2020-09-29 | Motor protection structure of tamping tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215009968U true CN215009968U (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022182337.2U Active CN215009968U (en) | 2020-09-29 | 2020-09-29 | Motor protection structure of tamping tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215009968U (en) |
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2020
- 2020-09-29 CN CN202022182337.2U patent/CN215009968U/en active Active
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