CN217738879U - Protection circuit for protecting horizontal tensile machine - Google Patents
Protection circuit for protecting horizontal tensile machine Download PDFInfo
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- CN217738879U CN217738879U CN202221960499.7U CN202221960499U CN217738879U CN 217738879 U CN217738879 U CN 217738879U CN 202221960499 U CN202221960499 U CN 202221960499U CN 217738879 U CN217738879 U CN 217738879U
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Abstract
The application relates to a protection circuit of horizontal pulling force machine belongs to the technical field of pulling force machine, and it includes: a control loop and a limit module; the control loop is synchronously connected with a power supply loop of an oil pump motor, and the oil pump motor is arranged on the horizontal tensile machine and used for pumping oil for an oil cylinder of the horizontal tensile machine; the limiting module is installed on the horizontal tensile machine and used for detecting the position of a traction head of the horizontal tensile machine and disconnecting the control loop when the position of the traction head reaches a preset position. This application detects the position of the drawing head of horizontal pulling force machine through spacing module, and in horizontal pulling force machine operation process, if the drawing head reaches when predetermineeing the position, automatic cutout control circuit to the power supply circuit of disconnection oil pump motor makes the drawing head stop the operation. Therefore, the position of the traction head does not need to be observed manually, the traction head is prevented from exceeding the limit position better, and the damage of the horizontal tensile machine is reduced.
Description
Technical Field
The application relates to the technical field of tensile machines, in particular to a protection circuit for protecting a horizontal tensile machine.
Background
The horizontal tensile machine is also necessary equipment in mechanical property tests, and is widely applied to the fields of stretching of various metal materials, steel cables, chains, hoisting belts and the like, widely used for metal products, building structures, ships, war industry and the like.
Usually, the traction head of the horizontal tensile machine is driven by an oil cylinder, oil is pumped into the oil cylinder through an oil pump motor, so that the traction head can pull a tested sample to carry out tensile test, and the position of the traction head needs to be observed manually in the test to prevent the traction head from exceeding the limit position and further causing the damage of the horizontal tensile machine.
In view of the above-described related art, the inventors found that the following drawbacks exist: because the test data need be collected when the detection work is carried out, the detection personnel probably neglect to observe the position of the traction head or forget to stop the oil pump motor in time, and therefore, the horizontal tensile machine still has the defect of easy damage.
SUMMERY OF THE UTILITY MODEL
In order to reduce the easy damaged defect of horizontal pulling force machine, this application provides a protection circuit of protection horizontal pulling force machine.
A protection circuit for protecting a horizontal tensile machine comprises: a control loop and a limit module; wherein,
the control loop is synchronously connected with a power supply loop of an oil pump motor, and the oil pump motor is arranged on the horizontal tensile machine and used for pumping oil for an oil cylinder of the horizontal tensile machine;
the limiting module is installed on the horizontal tensile machine and used for detecting the position of a traction head of the horizontal tensile machine and disconnecting the control loop when the position of the traction head reaches a preset position.
By adopting the technical scheme, the limiting module detects the position of the traction head of the horizontal tensile machine, and in the operation process of the horizontal tensile machine, if the traction head reaches the preset position, the control loop is automatically cut off, so that the power supply loop of the oil pump motor is cut off, and the traction head stops running. Therefore, the position of the traction head does not need to be observed manually, the traction head is prevented from exceeding the limit position better, and the damage of the horizontal tensile machine is reduced.
Optionally, the limiting module includes a first position switch and a second position switch, and a detection contact of the first position switch and a detection contact of the second position switch are arranged on the horizontal tensile machine at intervals along the moving direction of the drawing head.
By adopting the technical scheme, the installation positions of the detection contact of the first position switch and the detection contact of the second position switch are the preset positions, and when the traction head reaches the detection contact position of the first position switch or the detection contact position of the second position switch, the control loop is disconnected.
Optionally, the control circuit includes a first button switch, a second button switch, a first intermediate relay, a second intermediate relay, and a contactor; wherein,
a normally open switch SQ1-1 of the first position switch is connected with a coil KA1 of the first intermediate relay in series, after the normally open switch SQ1-1 is connected with the coil KA1 of the first intermediate relay in series, one end of the normally open switch SQ1-1 is connected with an anode L1+ of a first control power supply for supplying power, and the other end of the normally open switch SQ 1-is connected with a cathode L1-of the first control power supply; a normally open switch SQ2-1 of the second position switch is connected with a coil KA2 of the first intermediate relay in series, after the normally open switch SQ2-1 is connected with the coil KA2 of the first intermediate relay in series, one end of the normally open switch SQ2-1 is connected with an anode L1+ of the first control power supply, and the other end of the normally open switch SQ2-1 is connected with a cathode L1-of the first control power supply;
a normally open switch SA1-1 of the first button switch, a normally closed switch SA2-1 of the second button switch, a coil KM of the contactor, a normally closed switch KA1-1 of the first intermediate relay and a normally closed switch KA2-1 of the second intermediate relay are connected in series, one end of the series is connected with a second control power supply L2, and the other end of the series is connected with a zero line; and the normally open switch SA1-1 of the first button switch is connected in parallel with the normally open switch KM-1 of the contactor.
By adopting the technical scheme, the first button switch is pressed down during normal operation, the oil pump motor works, the oil pump motor stops when the first button switch is manually pressed down, and if the traction head reaches the first position switch or the second position switch, the normally closed switch corresponding to the position switch acts to be disconnected so as to automatically cut off the control loop, so that the power supply loop of the oil pump motor is synchronously cut off, and the traction head stops running.
Optionally, one end of the first intermediate relay normally-closed switch KA1-1, which is far away from the second intermediate relay normally-closed switch KA2-1, is connected with one end of the normally-closed switch KM-2 of the contactor, and one end of the second intermediate relay normally-closed switch KA2-1, which is far away from the first intermediate relay normally-closed switch KA1-1, is connected with the other end of the normally-closed switch KM-2 of the contactor.
By adopting the technical scheme, when the control loop is cut off by the first position switch or the second position switch, at the moment, the normally closed switch SQ1-1 of the first position switch is disconnected or the normally closed switch SQ2-1 of the second position switch is disconnected, so that the control loop cannot be conducted, the normally closed switch KM-2 of the contactor is connected in parallel to the two ends of the first position switch and the second position switch, the current passes through the normally closed switch of the contactor at the starting moment to form a path, and when the traction head leaves the detection contact of the first position switch or the detection contact of the second position switch, the normally closed switch SQ1-1 of the first position switch is closed or the normally closed switch SQ2-1 of the second position switch is closed, so that the control loop is kept conducted.
Optionally, the limiting module further includes a third position switch, a fourth position switch and an early warning loop, where a detection contact of the third position switch and a detection contact of the fourth position switch are disposed on the horizontal tensile machine at intervals along a moving direction of the traction head, and are located between the first position switch and the second position switch;
the protection circuit further comprises an early warning loop, and the early warning loop is used for outputting an early warning signal when the traction head reaches the third position switch detection contact or the fourth position switch detection contact.
Through adopting above-mentioned technical scheme, remind the pull head of detection personnel horizontal pulling force machine to be about to reach limit position.
Optionally, the early warning loop (500) includes a buzzer HA, a third intermediate relay, and a fourth intermediate relay; wherein,
a normally open switch SQ3-1 of the third position switch is connected with a coil KA3 of the third intermediate relay in series, one end of the normally open switch SQ3-1 is connected with an anode L1+ of the first control power supply after the normally open switch SQ3-1 is connected with the coil KA3 of the third intermediate relay in series, and the other end of the normally open switch SQ3-1 is connected with a cathode L1-of the first control power supply; a normally open switch SQ4-1 of the fourth position switch is connected with a coil KA4 of the fourth intermediate relay in series, one end of the normally open switch SQ4-1 is connected with an anode L1+ of the first control power supply after the normally open switch SQ4-1 is connected with the coil KA4 of the fourth intermediate relay in series, and the other end of the normally open switch SQ4-1 is connected with a cathode L1-of the first control power supply;
one end of the buzzer HA is connected with the second control power supply L2, the other end of the buzzer HA is connected with one end of the third intermediate relay normally-open switch KA3-1 and one end of the fourth intermediate relay normally-open switch KA4-1 respectively, and the other end of the third intermediate relay normally-open switch KA3-1 and the other end of the fourth intermediate relay normally-open switch KA4-1 are both connected with a zero line.
By adopting the technical scheme, when the traction head reaches the position of the third position switch detection contact or the position of the fourth position switch detection contact, the third position switch normally-open switch or the fourth position switch normally-open switch acts and is closed, so that the early warning loop is conducted, and the buzzer HA gives out sound early warning.
Optionally, the protection circuit further includes a first indicator light D1, a second indicator light D2, and a third indicator light D3, one end of the first indicator light D1 is connected to the second control power source L2, and the other end of the first indicator light D1 is connected to a zero line;
the second indicator light D2 is connected in series in the control loop;
the third indicator light D3 is connected in series in the early warning loop.
Through adopting above-mentioned technical scheme, first pilot lamp D1 is control power indicator, and second pilot lamp D2 is control circuit pilot lamp, and third pilot lamp D3 is early warning return circuit pilot lamp to be convenient for the measurement personnel and observe protection circuit's state, also be convenient for simultaneously failure diagnosis.
Optionally, the protection circuit further includes a fuse FU, one end of the fuse FU is connected to one end of the first indicator light D1, one end of the second indicator light D2, and one end of the third indicator light D3, respectively, and the other end of the fuse FU is connected to the zero line.
Through adopting above-mentioned technical scheme, fuse FU is to protection circuit overcurrent protection, when the short circuit trouble takes place among the protection circuit, fuse FU fuses in order to protect other components not burnt by short-circuit current.
In summary, the present application at least includes the following beneficial effects:
1. the purpose of setting up spacing module is, and spacing module detects the position of the drawing head of horizontal tensile machine, and in the operation of horizontal tensile machine, if the drawing head reaches when predetermineeing the position, automatic cutout control circuit to the power supply circuit of disconnection oil pump motor makes the drawing head stop operation. Therefore, the position of the traction head does not need to be observed manually, the traction head is prevented from exceeding the limit position better, and the damage of the horizontal tensile machine is reduced.
Drawings
FIG. 1 is a circuit block diagram of one embodiment of the protection circuit of the present application;
FIG. 2 is a schematic structural diagram of the horizontal pulling machine of the present application;
FIG. 3 is a circuit block diagram of one embodiment of a limit module of the present application;
fig. 4 is a circuit configuration diagram of another embodiment of the protection circuit of the present application.
Description of reference numerals: 100. a control loop; 200. a limiting module; 300. an oil cylinder; 400. a traction head; 500. and (5) an early warning loop.
Detailed Description
The present application is further described in detail with reference to fig. 1-4 as examples.
The application discloses protection circuit of horizontal pulling force machine as an implementation mode of protection circuit of horizontal pulling force machine, as shown in fig. 1 and fig. 2, it includes: a control loop 100 and a limit module 200; wherein,
the control loop 100 is synchronously switched on and off with a power supply loop of an oil pump motor, the oil pump motor (not shown in the figure) is arranged on the horizontal tensile machine and is used for pumping oil for an oil cylinder 300 of the horizontal tensile machine, and the oil cylinder 300 is used for driving a traction head 400 of the horizontal tensile machine to move; the limiting module 200 is mounted on the horizontal tensile machine and used for detecting the position of a traction head 400 of the horizontal tensile machine and disconnecting the control loop 100 when the position of the traction head 400 reaches a preset position.
As shown in fig. 2, as an embodiment of the position limiting module 200, the position limiting module 200 includes a first position switch and a second position switch, and a detection contact of the first position switch and a detection contact of the second position switch are spaced apart from each other along a moving direction of the drawing head 400 on the horizontal tensile machine. The traction head 400 runs between the positions where the first position switch and the second position switch are installed, and when the traction head 400 reaches the first position switch or the second position switch, the power supply circuit of the oil pump motor is disconnected, so that the oil cylinder 300 cannot drive the traction head 400 to move.
As shown in fig. 1 and 3, as an embodiment of the control circuit 100, the control circuit 100 includes a first button switch, a second button switch, a first intermediate relay, a second intermediate relay, and a contactor; wherein,
a normally open switch SQ1-1 of the first position switch is connected with a coil KA1 of the first intermediate relay in series, after the normally open switch SQ1-1 is connected with the coil KA1 of the first intermediate relay in series, one end of the normally open switch SQ1-1 is connected with an anode L1+ of a first control power supply for supplying power, and the other end of the normally open switch SQ1-1 is connected with a cathode L1-of the first control power supply; a normally open switch SQ2-1 of the second position switch is connected with a coil KA2 of the first intermediate relay in series, after the normally open switch SQ2-1 is connected with the coil KA2 of the first intermediate relay in series, one end of the normally open switch SQ2-1 is connected with an anode L1+ of the first control power supply, and the other end of the normally open switch SQ2-1 is connected with a cathode L1-of the first control power supply; a normally open switch SA1-1 of the first button switch, a normally closed switch SA2-1 of the second button switch, a coil KM of the contactor, a normally closed switch KA1-1 of the first intermediate relay and a normally closed switch KA2-1 of the second intermediate relay are connected in series, one end of the series is connected with a second control power supply L2, and the other end of the series is connected with a zero line; and the normally open switch SA1-1 of the first button switch is connected with the normally open switch KM-1 of the contactor in parallel.
This application is kept apart position switch and control circuit through increasing auxiliary relay, has strengthened the reliability in return circuit, and wherein, first control power supply is 24V DC power supply, under the normal condition, presses first button switch, and control circuit 100 switches on, and the main contact of contactor is closed for the power supply circuit of oil pump motor switches on, presses second button switch, and control circuit 100 breaks off, and the main contact of contactor breaks off, makes the power supply circuit disconnection of oil pump motor.
When the control circuit 100 is turned off by the first position switch or the second position switch, the control circuit 100 cannot be turned on because the normally closed switch SQ1-1 of the first position switch is turned off or the normally closed switch SQ2-1 of the second position switch is turned off.
In order to solve the problem, one end of the first intermediate relay normally-closed switch KA1-1, which is far away from the second intermediate relay normally-closed switch KA2-1, is connected with one end of the contactor normally-closed switch KM-2, and one end of the second intermediate relay normally-closed switch KA2-1, which is far away from the first intermediate relay normally-closed switch KA1-1, is connected with the other end of the contactor normally-closed switch KM-2. At the moment of starting, current passes through the normally closed switch of the contactor to form a path, and when the traction head 400 leaves a detection contact of the first position switch or a detection contact of the second position switch, the normally closed switch SQ1-1 of the first position switch is closed or the normally closed switch SQ2-1 of the second position switch is closed, so that the control loop 100 is kept conducted.
As shown in fig. 3 and fig. 4, in order to remind the inspector that the drawing head 400 of the horizontal tensile machine will reach the limit position, the limit module 200 further includes a third position switch and a fourth position switch, and the detection contact of the third position switch and the detection contact of the fourth position switch are arranged on the horizontal tensile machine at intervals along the moving direction of the drawing head 400 and are located between the first position switch and the second position switch; the protection circuit further comprises an early warning loop 500, and the early warning loop 500 is used for outputting an early warning signal when the traction head 400 reaches the third position switch or the fourth position switch.
As an embodiment of the warning circuit 500, the warning circuit (500) includes a buzzer HA, a third intermediate relay and a fourth intermediate relay; wherein,
a normally open switch SQ3-1 of the third position switch is connected with a coil KA3 of the third intermediate relay in series, after the normally open switch SQ3-1 is connected with the coil KA3 of the third intermediate relay in series, one end of the normally open switch SQ3-1 is connected with the anode L1+ of the first control power supply, and the other end of the normally open switch SQ3-1 is connected with the cathode L1-of the first control power supply; a normally open switch SQ4-1 of the fourth position switch is connected with a coil KA4 of the fourth intermediate relay in series, after the normally open switch SQ4-1 is connected with the coil KA4 of the fourth intermediate relay in series, one end of the normally open switch SQ4-1 is connected with the anode L1+ of the first control power supply, and the other end of the normally open switch SQ4-1 is connected with the cathode L1-of the first control power supply;
one end of the buzzer HA is connected with the second control power supply L2, the other end of the buzzer HA is connected with one end of a third intermediate relay normally-open switch KA3-1 and one end of a fourth intermediate relay normally-open switch KA4-1 respectively, and the other end of the third intermediate relay normally-open switch KA3-1 and the other end of the fourth intermediate relay normally-open switch KA4-1 are both connected with a zero line.
As shown in fig. 1 and fig. 4, in order to indicate the working state of each circuit and facilitate the maintenance and troubleshooting, the protection circuit of the horizontal tensile machine further includes a first indicator light D1, a second indicator light D2, and a third indicator light D3, one end of the first indicator light D1 is connected to the second control power source L2, and the other end of the first indicator light D1 is connected to the zero line;
a second indicator light D2 is connected in series in the control circuit 100, one end of the second indicator light D2 is connected with the connection position of the second position switch normally closed switch and the normally closed switch of the contactor, and the other end of the second indicator light D2 is connected with a zero line;
the third indicator light D3 is connected in series in the early warning loop 500, one end of the third indicator light D3 is connected to the joint of the third position switch normally-open switch and the fourth position switch normally-open switch, and the other end of the third indicator light D3 is connected with the zero line.
The protection circuit of the horizontal tensile machine further comprises a fuse FU, one end of the fuse FU is connected with one end of the first indicator light D1, one end of the second indicator light D2 and one end of the third indicator light D3 respectively, and the other end of the fuse FU is connected with a zero line.
The implementation principle of the embodiment is as follows:
when the first button switch is pressed during normal operation, the control circuit 100 is conducted, the main contact of the contactor is closed, so that the power supply circuit of the oil pump motor is conducted, the normally open switch of the contactor is closed, the control circuit 100 keeps conducting, the oil pump motor continuously works, and the oil pump motor stops when the first button switch is manually pressed;
if the drawing head 400 reaches the third position switch or the fourth position switch, the normally open switch corresponding to the position switch acts to close, so as to automatically turn on the early warning loop 500, and therefore the buzzer HA gives out sound early warning to remind the detector that the drawing head 400 of the horizontal tensile machine will reach the limit position.
If the drawing head 400 reaches the first position switch or the second position switch, the normally closed switch corresponding to the position switch is turned off to automatically cut off the control circuit 100, so that the power supply circuit of the oil pump motor is synchronously cut off to stop the drawing head 400.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a protection circuit of protection horizontal pulling force machine which characterized in that: comprises a control loop (100) and a limit module (200); wherein,
the control loop (100) is synchronously connected with a power supply loop of an oil pump motor, and the oil pump motor is arranged on the horizontal tensile machine and used for pumping oil for an oil cylinder (300) of the horizontal tensile machine;
the limiting module (200) is installed on the horizontal tensile machine and used for detecting the position of a traction head (400) of the horizontal tensile machine and controlling the control loop (100) to be disconnected when the position of the traction head (400) reaches a preset position.
2. The protection circuit for protecting the horizontal tensile machine according to claim 1, characterized in that: the limiting module (200) comprises a first position switch and a second position switch, and a detection contact of the first position switch and a detection contact of the second position switch are arranged on the horizontal tensile machine at intervals along the moving direction of the traction head (400).
3. The protection circuit for protecting the horizontal tensile machine according to claim 2, wherein: the control circuit (100) comprises a first button switch, a second button switch, a first intermediate relay, a second intermediate relay and a contactor; wherein,
a normally open switch SQ1-1 of the first position switch is connected with a coil KA1 of the first intermediate relay in series, after the normally open switch SQ1-1 is connected with the coil KA1 of the first intermediate relay in series, one end of the normally open switch SQ1-1 is connected with an anode L1+ of a first control power supply for supplying power, and the other end of the normally open switch SQ 1-is connected with a cathode L1-of the first control power supply; a normally open switch SQ2-1 of the second position switch is connected with a coil KA2 of the first intermediate relay in series, one end of the normally open switch SQ2-1 is connected with an anode L1+ of the first control power supply after the normally open switch SQ2-1 is connected with the coil KA2 of the first intermediate relay in series, and the other end of the normally open switch SQ2-1 is connected with a cathode L1-of the first control power supply;
a normally open switch SA1-1 of the first button switch, a normally closed switch SA2-1 of the second button switch, a coil KM of the contactor, a normally closed switch KA1-1 of the first intermediate relay and a normally closed switch KA2-1 of the second intermediate relay are connected in series, one end of the series is connected with a second control power supply L2, and the other end of the series is connected with a zero line; and the normally open switch SA1-1 of the first button switch is connected in parallel with the normally open switch KM-1 of the contactor.
4. The protection circuit for protecting the horizontal tensile machine according to claim 3, characterized in that: the first intermediate relay normally closed switch KA1-1 is far away from one end of the second intermediate relay normally closed switch KA2-1 is connected with one end of the normally closed switch KM-2 of the contactor, and the second intermediate relay normally closed switch KA2-1 is far away from one end of the first intermediate relay normally closed switch KA1-1 is connected with the other end of the normally closed switch KM-2 of the contactor.
5. A protection circuit for protecting a horizontal tensile machine according to claim 3 or 4, wherein: the limiting module (200) further comprises a third position switch and a fourth position switch, and a detection contact of the third position switch and a detection contact of the fourth position switch are arranged on the horizontal tensile machine at intervals along the moving direction of the drawing head (400) and are positioned between the first position switch and the second position switch;
the protection circuit further comprises an early warning loop (500), and the early warning loop (500) is used for outputting an early warning signal when the traction head (400) reaches the third position switch or the fourth position switch.
6. The protection circuit for protecting the horizontal tensile machine according to claim 5, wherein: the early warning loop (500) comprises a buzzer HA, a third intermediate relay and a fourth intermediate relay; wherein,
a normally open switch SQ3-1 of the third position switch is connected with a coil KA3 of the third intermediate relay in series, one end of the normally open switch SQ3-1 is connected with an anode L1+ of the first control power supply after the normally open switch SQ3-1 is connected with the coil KA3 of the third intermediate relay in series, and the other end of the normally open switch SQ3-1 is connected with a cathode L1-of the first control power supply; a normally open switch SQ4-1 of the fourth position switch is connected with a coil KA4 of the fourth intermediate relay in series, one end of the normally open switch SQ4-1 is connected with an anode L1+ of the first control power supply after the normally open switch SQ4-1 is connected with the coil KA4 of the fourth intermediate relay in series, and the other end of the normally open switch SQ4-1 is connected with a cathode L1-of the first control power supply;
one end of the buzzer HA is connected with the second control power supply L2, the other end of the buzzer HA is connected with one end of the third intermediate relay normally-open switch KA3-1 and one end of the fourth intermediate relay normally-open switch KA4-1 respectively, and the other end of the third intermediate relay normally-open switch KA3-1 and the other end of the fourth intermediate relay normally-open switch KA4-1 are both connected with a zero line.
7. The protection circuit for protecting the horizontal tensile machine according to claim 6, wherein: the protection circuit further comprises a first indicator light D1, a second indicator light D2 and a third indicator light D3, one end of the first indicator light D1 is connected with the second control power supply L2, and the other end of the first indicator light D1 is connected with a zero line;
the second indicator light D2 is connected in series in the control loop (100);
the third indicator light D3 is connected in series in the early warning loop (500).
8. The protection circuit for protecting the horizontal tensile machine according to claim 7, wherein: the protection circuit further comprises a fuse FU, one end of the fuse FU is connected with one end of the first indicator light D1, one end of the second indicator light D2 and one end of the third indicator light D3 respectively, and the other end of the fuse FU is connected with a zero line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221960499.7U CN217738879U (en) | 2022-07-27 | 2022-07-27 | Protection circuit for protecting horizontal tensile machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221960499.7U CN217738879U (en) | 2022-07-27 | 2022-07-27 | Protection circuit for protecting horizontal tensile machine |
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| CN217738879U true CN217738879U (en) | 2022-11-04 |
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| CN202221960499.7U Active CN217738879U (en) | 2022-07-27 | 2022-07-27 | Protection circuit for protecting horizontal tensile machine |
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