Rear sliver break alarm and lock device for draw frame

Abstract

The present invention relates to a rear broken bar alarm locking device of a drawing frame, comprising a balance bar suspended between a rear guide bar frame and a drafting roller of the drawing frame, the balance bar being horizontally arranged below the bar stem, a detection seat being arranged on one side of the balance bar, a groove extending vertically downward being arranged on the upper end of the detection seat, the groove forming an opening on a side of the detection seat facing the balance bar, a pin shaft parallel to the balance bar being connected in the groove, a baffle being rotatably connected to the pin shaft, a photoelectric transmitter and a photoelectric receiver being arranged on the inner walls of both sides of the groove, respectively, the photoelectric transmitter and the photoelectric receiver being located directly below the pin shaft and facing each other, the baffle being just blocked between the photoelectric receiver and the photoelectric transmitter when it droops naturally, and the free end of the baffle being just overlapped on the balance bar after the baffle is swung upward, and at this time there is no shielding between the photoelectric receiver and the photoelectric transmitter. The present invention has a more accurate detection effect on broken bars in the drawing process.

Description

Technical Field

[0001] The invention relates to a rear-strip break alarm locking device for a drawing frame Background Art

[0002] If the sliver breaks during the drawing process of the drawing frame and is not handled in time, slivers will be formed. After the coarse yarn drawing and fine yarn drawing, the slivers will form quality defects such as sliver knots, unbalanced yarns, and blending ratio deviation. Therefore, real-time monitoring of the integrity of the draw frame to avoid the formation of slivers during the drawing process is particularly important.

[0003] At present, the method used to detect the phenomenon of broken strips is to use photoelectric sensors. A photoelectric receiver is set above the strips, and a photoelectric transmitter is set below the strips. When the strips are normal, the photoelectric transmitter and the photoelectric receiver are blocked. When the strips are broken, the photoelectric receiver can receive the light signal emitted by the photoelectric transmitter, thereby sending a signal to the controller, and the controller controls the draw frame to stop.

[0004] Since there is a lateral deviation when the strip moves forward on the rear guide rack, the above-mentioned detection device is prone to false alarms. In addition, after the strip breaks, the strip may fall and cover the photoelectric emitter below it, causing the detection device to fail. Therefore, the currently used strip break detection device has a high false alarm rate and poor detection effect. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a drawing frame rear broken bar alarm locking device with more accurate detection effect.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a rear broken bar alarm locking device of the drawing frame, comprising a balance bar suspended between the rear guide frame of the drawing frame and the stretching roller, the balance bar is horizontally arranged below the bar, a detection seat is arranged on one side of the balance bar, a groove extending vertically downward is arranged on the upper end of the detection seat, the groove forms an opening on the side of the detection seat facing the balance bar, a pin shaft parallel to the balance bar is connected in the groove, a baffle is rotatably connected to the pin shaft, a photoelectric transmitter and a photoelectric receiver are respectively arranged on the inner walls on both sides of the groove, the photoelectric transmitter and the photoelectric receiver are located directly below the pin shaft and directly opposite to each other, when the baffle naturally droops, it just blocks between the photoelectric receiver and the photoelectric transmitter, after the baffle swings upward, the free end of the baffle just overlaps the balance bar, at this time there is no obstruction between the photoelectric receiver and the photoelectric transmitter.

[0007] As a preferred solution, the balance pole is suspended by two thin ropes, the two thin ropes are symmetrically distributed on both sides of the center of the balance pole and are close to the center of the balance pole, and the spacing between the two thin ropes is 5cm~20cm.

[0008] As a preferred solution, the upper ends of the two thin ropes are directly or indirectly fixedly connected to the drawing frame frame, and the detection seat is also directly or indirectly fixedly connected to the drawing frame frame.

[0009] As a preferred solution, the upper ends of the two thin ropes are directly or indirectly fixedly connected to an independent bracket that does not contact the drawing frame; the detection seat is also directly or indirectly fixedly connected to the bracket.

[0010] As a preferred solution, the groove on the detection seat is directly opposite to the center of the balance pole, and the baffle is just overlapped at the center position of the balance pole.

[0011] As a preferred solution, the photoelectric receiver is electrically connected to the controller of the drawing frame, an electronic switch is connected in series to the power supply circuit of the drawing frame, and the electronic switch is also electrically connected to the controller. The controller controls the on and off of the electronic switch according to whether the electrical signal sent by the photoelectric receiver is received.

[0012] As a preferred solution, the electronic switch is a field effect tube, a relay or a triode.

[0013] The beneficial effects of the present invention are as follows: the present invention detects broken strips through a balance bar, uses the balance bar to position a baffle, and uses the baffle to block a photoelectric transmitter and a photoelectric receiver, thereby ensuring that the broken strip alarm locking device after the drawing frame can accurately detect the broken strip phenomenon, thereby being able to shut down the drawing frame in time to avoid the occurrence of thin strips. The balance bar is used to detect broken strips, and no false alarms will occur when the strips are continuous. Moreover, when there is a broken strip, the broken strip will inevitably fall on the balance bar, but will not be blocked on the photoelectric transmitter or the photoelectric receiver, so there will be no problem of detection failure. Therefore, the broken strip alarm locking device after the drawing frame described in the present invention has better detection effect and higher accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 yes Figure 1 A-direction view in the figure;

[0017] Figure 3 This is the structural view of the baffle when it droops naturally;

[0018] Figure 4 It is another specific structural schematic diagram of the present invention;

[0019] Figure 5 It is a power supply circuit diagram of the drawing frame described in the present invention.

[0020] Figure 1~Figure 5 Middle: 1. Rear guide frame, 2. Drafting roller, 3. Balance bar, 4. Strip, 5. Detection seat, 6. Groove, 7. Pin, 8. Baffle, 9. Photoelectric transmitter, 10. Photoelectric receiver, 11. String, 12. Drawing frame frame, 13. Bracket, 14. Controller, 15. Electronic switch. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1~Figure 3 As shown, the rear broken bar alarm locking device of the drawing frame is characterized in that it includes a balance bar 3 suspended between the rear guide frame 1 of the drawing frame and the stretching roller 2, the balance bar 3 is horizontally arranged below the bar 4, a detection seat 5 is arranged on one side of the balance bar 3, and a groove 6 extending vertically downward is arranged on the upper end of the detection seat 5, and the groove 6 forms an opening on the side of the detection seat 5 facing the balance bar 3, a pin shaft 7 parallel to the balance bar 3 is connected in the groove 6, a baffle 8 is rotatably connected to the pin shaft 7, and a photoelectric transmitter 9 and a photoelectric receiver 10 are respectively arranged on the inner walls of both sides of the groove 6, the photoelectric transmitter 9 and the photoelectric receiver 10 are located directly below the pin shaft 7 and directly opposite to each other, and the baffle 8 is just blocked between the photoelectric receiver 10 and the photoelectric transmitter 9 when it droops naturally, and the free end of the baffle 8 is just overlapped on the balance bar 3 after the baffle 8 swings upward, and there is no obstruction between the photoelectric receiver 10 and the photoelectric transmitter 9.

[0023] The balance pole 3 is suspended by two thin ropes 11, which are symmetrically distributed on both sides of the center of the balance pole 3 and are close to the center of the balance pole 3. The spacing between the two thin ropes 11 is 5cm~20cm. The smaller the spacing between the two thin ropes 11, the more sensitive the balance pole 3 is.

[0024] like Figure 2 As shown, the upper ends of the two thin ropes 11 are directly or indirectly fixedly connected to the drawing frame frame 12, and the detection seat 5 is also directly or indirectly fixedly connected to the drawing frame frame 12. The groove 6 on the detection seat 5 is directly opposite to the center of the balance bar 3, and the baffle 8 is just overlapped at the center position of the balance bar 3.

[0025] like Figure 5 As shown, the photoelectric receiver 10 is electrically connected to the controller 14 of the drawing frame, and an electronic switch 15 is connected in series to the power supply circuit of the drawing frame, and the electronic switch 15 is also electrically connected to the controller 14. The controller 14 controls the on and off of the electronic switch 15 according to whether the electrical signal sent by the photoelectric receiver 10 is received. The electronic switch 15 is a field effect tube or a relay or a triode, preferably a relay.

[0026] like Figure 4As shown, the upper ends of the two thin ropes 11 can also be directly or indirectly fixedly connected to an independent bracket 13 that does not contact the drawing frame; the detection seat 5 can also be directly or indirectly fixedly connected to the bracket 13. The bracket 13 does not contact the drawing frame and therefore does not vibrate, thereby improving the stability of the balance bar 3, avoiding the vibration of the balance bar 3 that causes the baffle 8 to automatically fall off and produce a false alarm, and further improving the detection accuracy.

[0027] The working process of the present invention is: when there is a broken bar, the end of the broken bar will fall onto the balance bar 3, causing the balance bar 3 to swing, and the swing of the balance bar 3 will cause the baffle 8 overlapped thereon to separate from the balance bar 3. After the baffle 8 separates from the balance bar 3, it will swing down to a natural drooping state, blocking between the photoelectric transmitter 9 and the photoelectric receiver 10, blocking the photoelectric receiver 10 from receiving the optical signal, and the controller 14 cannot receive the signal sent by the photoelectric receiver 10. The controller 14 is preset with a program. When the controller 14 cannot receive the signal sent by the photoelectric receiver 10, the electronic switch 15 is controlled to be disconnected. After the electronic switch 15 is disconnected, the power supply circuit of the drawing machine is disconnected, and even if the operator presses the start switch 16 of the drawing machine, the drawing machine cannot be started. This forces the operator to check the cause of the shutdown. After the broken bar is connected and the overlap relationship between the baffle 8 and the balance bar 3 is restored, the controller 14 receives the signal sent by the photoelectric receiver 10 again, and the controller 14 restores the connected state of the electronic switch 15. At this time, the start switch 16 is pressed again, and the drawing machine can resume production.

[0028] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. The rear broken sliver alarm and lock device of the draw frame is characterized by: The invention comprises a balance bar (3) suspended between a rear guide frame (1) of a drawing frame and a drafting roller (2), the balance bar (3) being arranged horizontally below a bar (4), a detection seat (5) being arranged on one side of the balance bar (3), a groove (6) extending vertically downward being arranged on the upper end of the detection seat (5), the groove (6) forming an opening on a side of the detection seat (5) facing the balance bar (3), a pin shaft (7) parallel to the balance bar (3) being connected in the groove (6), a block being rotatably connected to the pin shaft (7) The plate (8) and the inner walls of both sides of the groove (6) are respectively provided with a photoelectric transmitter (9) and a photoelectric receiver (10). The photoelectric transmitter (9) and the photoelectric receiver (10) are located directly below the pin shaft (7) and directly opposite to each other. When the baffle (8) naturally droops, it just blocks between the photoelectric receiver (10) and the photoelectric transmitter (9). After the baffle (8) swings upward, the free end of the baffle (8) just overlaps the balance bar (3). At this time, there is no shielding between the photoelectric receiver (10) and the photoelectric transmitter (9).

2. The draw frame rear broken strand alarm and lock device according to claim 1, characterized in that: The balance pole (3) is suspended by two thin ropes (11), the two thin ropes (11) are symmetrically distributed on both sides of the center of the balance pole (3) and are close to the center of the balance pole (3), and the spacing between the two thin ropes (11) is 5 cm to 20 cm.

3. The rear-break alarm and lock device of the drawing frame according to claim 2, characterized in that: The upper ends of the two thin ropes (11) are directly or indirectly fixedly connected to the drawing frame frame (12), and the detection seat (5) is also directly or indirectly fixedly connected to the drawing frame frame (12).

4. The draw frame rear broken strand alarm and lock device according to claim 2, characterized in that: The upper ends of the two thin ropes (11) are directly or indirectly fixedly connected to an independent bracket (13) that is not in contact with the drawing frame; the detection seat (5) is also directly or indirectly fixedly connected to the bracket (13).

5. The rear draw frame break alarm and lock device according to claim 1, characterized in that: The groove (6) on the detection seat (5) is directly opposite to the center of the balance pole (3), and the baffle (8) is just overlapped at the center position of the balance pole (3).

6. The rear-break alarm and lock device of the drawing frame according to claim 1, characterized in that: The photoelectric receiver (10) is electrically connected to a controller (14) of the drawing frame. An electronic switch (15) is connected in series to the power supply circuit of the drawing frame. The electronic switch (15) is also electrically connected to the controller (14). The controller (14) controls the on and off of the electronic switch (15) according to whether an electrical signal sent by the photoelectric receiver (10) is received.

7. The rear draw frame break alarm and lock device according to claim 6, characterized in that: The electronic switch (15) is a field effect tube, a relay or a triode.

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