Tension compensation device of doffing trolley

Abstract

The invention discloses a tension compensation device for a doffing trolley, relates to the technical field of yarn spinning, and solves the problem of doffing failure easily caused by transient relaxation of yarns in a yarn hanging process during doffing. The tension compensation device comprises a movable suction head, the suction head is located on the upstream of the yarn suction pipe, the suction head is communicated with a suction opening capable of generating negative pressure, and the suction opening can hold the yarn while the yarn suction pipe sucks the broken end of the yarn so as to suck the yarn and enable the yarn to generate certain tension. According to the yarn tension compensation device, the suction head can move and switch between the standby state and the working state, the suction opening in the suction head can move to the side of the yarn in the working state, and negative pressure is generated to suck the yarn so that the yarn can generate certain tension; and the yarn is prevented from breaking away from the sensing area of the broken yarn sensor due to temporary loosening.

Description

Technical Field

[0001] The invention relates to the technical field of yarn spinning, in particular to a tension compensation device for a doffing trolley. Background Art

[0002] Yarn is a textile product that is made of various textile fibers and processed into a product of a certain fineness. It is used for weaving, rope making, thread making, knitting and embroidery. After the yarn is produced, it needs to be wound into a drum for transportation. For example, the mobile doffing head and doffing trolley with publication number CN117418336A, when the yarn is put on, the yarn will be wound onto the drum through the doffing trolley, and then the yarn will be cut by the doffing head and the drum full of yarn will be pushed out of the doffing trolley.

[0003] The doffing head cuts the yarn through the first cutting device. Since the yarn is continuously spinning when hanging, the yarn will be sucked into the yarn suction tube at the moment of cutting while waiting for the next bobbin to be replaced to prevent the yarn from interrupting spinning. Then the doffing head is moved by the manipulator to lift the sucked yarn upward to send the yarn to the location of the bobbin. The yarn will be clamped by the clamp next to the rotating bobbin and then wound around the bobbin. Due to the limited suction force of the yarn suction tube, the yarn tension will be insufficient at the moment of cutting when hanging the yarn, and it will be temporarily relaxed. There is a yarn break sensor under the doffing head to detect whether the yarn is in place. If the yarn is relaxed, it will cause the yarn to leave the sensing area of ​​the yarn break sensor, which may trigger the spinning of the spindle position to stop, resulting in the failure of the doffing process. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems. A tension compensation device for a yarn dropping trolley is designed to solve the problem that the yarn will be temporarily relaxed when hanging the yarn, which may easily cause the spindle to stop spinning.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: a tension compensation device for a yarn doffing trolley is used to be installed on the yarn doffing trolley, the yarn doffing trolley has a yarn suction tube, and the yarn suction tube is used to suck the broken ends of the yarn during the yarn doffing process. The tension compensation device includes a movable suction head, which is located upstream of the yarn suction tube, and the suction head is communicated with a suction port that can generate negative pressure. The suction port can hold the yarn while the yarn suction tube sucks the broken ends of the yarn, so as to suck the yarn and generate a certain tension in the yarn. The suction head has a working state and a standby state, and the suction head can move and switch between the working state and the standby state.

[0006] Furthermore, it also includes: Base plate; A rotating seat, the suction head is mounted on the rotating seat, and the rotating seat is rotatably connected to the bottom plate; The driving mechanism is connected to the rotating seat and is used to drive the rotating seat to rotate, so as to drive the suction head to move and switch between a working state and a waiting state.

[0007] Furthermore, a fixing plate is arranged on the bottom plate, the output end of the driving mechanism is hinged to the rotating seat through a connecting piece, and the tail end is hinged to the fixing plate.

[0008] Furthermore, the output end of the driving mechanism is connected with a connecting rod, and a connecting plate is provided on the rotating seat. One end of the connecting plate is fixedly connected to the rotating seat, and the other end has a hinge hole, and the connecting rod is hinged to the hinge hole.

[0009] Furthermore, a fixed block is provided on the base plate, and limiting bolts are respectively provided on adjacent two sides of the fixed block, and the limiting bolts are threadedly connected to the fixed block. Limiting parts are respectively provided at both ends of the rotating seat, and during the rotation of the rotating seat, the two limiting parts can respectively conflict with the two limiting bolts to adjust and control the rotation angle of the suction head.

[0010] Furthermore, a throttle valve is installed on one end of the suction head away from the suction port, and the throttle valve is used to be connected to the negative pressure generating device.

[0011] Furthermore, a pressure sensor for detecting negative pressure is integrated on the throttle valve.

[0012] Furthermore, the outer side of the suction head near the front end has the suction port.

[0013] Furthermore, the outer side of the suction head has a notch near the front end to form the suction port, and the notch has a guiding slope near the two ends of the suction head, and the two guiding slopes extend obliquely toward the center of the notch.

[0014] Furthermore, the front end surface of the suction head has the suction port, and one end with the suction port is bent toward the side where the yarn is located.

[0015] Compared with the prior art, the beneficial effects are: The yarn tension compensation device in the present invention is used to be installed on the yarn dropping trolley and is located upstream of the yarn suction tube. At the moment the yarn is cut, the broken end of the yarn will be sucked into the yarn suction tube, and the yarn will be temporarily relaxed. At this time, the suction head in the yarn tension compensation device will move from the waiting state to the working state, and the suction port on the suction head will move to the side of the yarn. The suction port will generate negative pressure to suck the yarn, so that the yarn has a certain tension to prevent the yarn from escaping from the sensing area of ​​the yarn break sensor due to the temporary relaxation of the yarn. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1is a schematic structural diagram of a yarn tension compensation device in an embodiment of the present invention when it is in a standby state; Figure 2 is a schematic structural diagram of a yarn tension compensation device in an embodiment of the present invention when it is in a working state; Figure 3 is a schematic diagram of the structure of the suction head in an embodiment of the present invention; Figure 4 It is a schematic diagram of the yarn tension compensation device when it cooperates with the yarn break sensor and the yarn suction tube; Figure 5 and Figure 6 Schematic diagram of the structure of the suction head in other embodiments.

[0017] In the figure, 1, suction head; 101, suction port; 1011, guide slope; 2, bottom plate; 3, rotating seat; 4, cylinder; 5, fixing block; 6, limiting bolt; 7, limiting member; 8, connecting rod; 9, connecting piece; 10, fixing plate; 11, hinge support; 12, throttle valve; 13, yarn suction tube; 14, yarn break sensor; 15, yarn. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 4 As shown, this embodiment proposes a tension compensation device for a yarn doffing trolley, which is used to compensate the tension of the yarn 15 at the moment when the yarn 15 is cut off when the yarn doffing trolley is changing the bobbin to hang the yarn, so as to prevent the yarn 15 from being too loose due to insufficient tension, causing the yarn 15 to escape from the sensing area of ​​the yarn break sensor 14.

[0020] like Figure 1 , Figure 2 As shown, the device is located upstream of the yarn suction tube on the yarn dropping trolley (i.e. upstream of the incoming direction of the yarn), and mainly includes a base plate 2, a suction head 1, a cylinder 4, a rotating seat 3 and other components, wherein there is a mounting hole in the middle of the rotating seat 3, a pin is installed in the mounting hole, and the rotating seat 3 is horizontally rotatably connected to the base plate 2 through the pin, and the pin is fixed on the base plate 2.

[0021] The air cylinder 4 is controlled by a solenoid valve to control the movement of the air cylinder 4. On one side of the bottom plate 2, a fixed plate 10 is installed. On the fixed plate 10, a hinge support 11 is installed. One end of a connecting rod 8 is connected to the output end of the air cylinder 4, and the tail end of the air cylinder 4 (i.e., the end far from the connecting rod 8) is hinged to the hinge support 11. On the rotating seat 3, a connecting piece 9 is installed. One end of the connecting piece 9 is fixed to the rotating seat 3 by screws, and the other end has a hinge hole for installing a pin shaft. The connecting rod 8 is hinged to the connecting piece 9 through the pin shaft. Since the hinge point of the connecting rod 8 and the connecting piece 9 is eccentric to the mounting hole on the rotating seat 3, during the telescopic process of the output end of the air cylinder 4, the connecting piece 9 can be pushed to rotate through the connecting rod 8, so that the rotating seat 3 rotates.

[0022] As a preferred technical solution of this embodiment, in other embodiments, other driving methods can also be used to control the rotation of the rotating seat 3.

[0023] Continue to refer to Figure 1 , Figure 2 , at both ends of the mounting seat, an L-shaped limiting member 7 is installed respectively, and the suction head 1 is installed on one of the limiting members 7. In the initial state (i.e., the state waiting for work), the suction head 1 and the bottom plate 2 are approximately in a straight line. During work, the air cylinder 4 will give a pulling force to the connecting piece 9 through the connecting rod 8, so that the rotating seat 3 rotates 90° along with the connecting piece 9, the suction head 1 and the bottom plate 2 become perpendicular, and the suction port 101 on the suction head 1 is close to the side of the yarn 15. At this time, the suction head 1 is in the working state.

[0024] In this embodiment, the suction head 1 can rotate arbitrarily between 0° and 90°. In other embodiments, the rotation angle of the suction head 1 is also variable, not limited to 0° - 90°.

[0025] As Figure 1 shown, in order to adjust and control the rotation angle of the suction head 1, a fixed block 5 is also installed on the bottom plate 2 beside the rotating seat 3. On two adjacent side surfaces of the fixed block 5, a limiting bolt 6 is installed respectively. The limiting bolt 6 is threadedly connected to the threaded hole on the fixed block 5. The two limiting bolts 6 cooperate with the two limiting members 7 respectively, and the rotation of the rotating seat 3 between 0° and 90° can be adjusted.

[0026] Refer to Figure 1 , when the suction head 1 is in the state waiting for work, the limiting member 7 for installing the suction head 1 abuts against one of the limiting bolts 6 on the fixed block 5. At this time, the included angle between the suction head 1 and the bottom plate 2 is 0°; refer to Figure 2 , when the suction head 1 is in the working state, the rotating seat 3 rotates 90°. The limiting member 7 at the end of the rotating seat 3 far from the suction head 1 abuts against the other limiting bolt 6 of the fixed block 5. At this time, the included angle between the suction head 1 and the bottom plate 2 is 90°.

[0027] In this embodiment, the suction head 1 enters the working position by rotating. In other embodiments, the suction head 1 can be extended into the working position by linear movement.

[0028] like Figure 3 As shown, in this embodiment, the suction head 1 is hollow, and preferably a notch is opened on the outside of the suction head 1 near the front end, so as to form a suction port 101. The notch is V-shaped, and the two sides of the notch near the two ends of the suction head 1 are inclined planes, forming guide inclined planes 1011. A throttle valve 12 is installed near the rear end of the suction head 1, and the throttle valve 12 is externally connected to a negative pressure generating device, and a negative pressure is generated at the suction port 101 through the negative pressure generating device, so that the yarn 15 is sucked and held, so that the yarn 15 has a certain tension so that it will not relax.

[0029] The throttle valve 12 controls the pressure of the negative pressure. A pressure sensor (not shown in the figure) is integrated on the throttle valve 12. The pressure sensor is used to detect the pressure generated by the negative pressure, and the generated negative pressure is adjusted in real time by the pressure obtained by the detection.

[0030] You can refer to Figure 4 Specifically, after the suction head 1 rotates into the working position, the yarn 15 will enter the suction port 101, and the suction head 1 will be perpendicular to the yarn 15 and pass through the suction port 101 upwards, and the guide slope 1011 plays a guiding role, guiding the yarn 15 into the suction port 101. Negative pressure will be generated at the suction port 101, sucking the yarn 15, so that the yarn 15 is tensioned.

[0031] The yarn break sensor 14 is located below the suction head 1 , and the notch design can hold the yarn 15 well to prevent the yarn 15 from escaping from the sensing area of ​​the yarn break sensor 14 .

[0032] In other technical solutions, the suction port 101 can also be designed on the front end surface of the suction head 1 (see Figure 5 ), so that when the suction head 1 rotates to the working position, the suction port 101 can just contact the side of the yarn 15 to suck the yarn 15. Alternatively, the front end of the suction head 1 is bent 90° to form an L shape, and the suction port 101 is located on the end surface of the L-shaped end (see Figure 6 ), after the suction head 1 rotates to the working position, the suction port 101 can reach the side of the yarn 15 and suck the yarn 15.

[0033] In this embodiment, the suction head 1 cooperates with the yarn suction tube 13 in the publication number CN117418336A. The yarn suction tube 13 is located above the suction head 1 (that is, downstream of the suction head 1). At the moment the yarn is cut, the broken end of the yarn will be sucked into the yarn suction tube 13, the yarn will be held and sucked into the yarn box to prevent spinning interruption.

[0034] At the moment when the yarn 15 is cut off, the broken end of the yarn 15 will be sucked into the yarn suction tube 13. At the same time, the suction head 1 generates negative pressure to suck the yarn 15 through the suction port 101, so that the yarn 15 is tightened. However, the suction force of the suction head 1 is generally not greater than that of the yarn suction tube 13, otherwise it is easy to draw away the yarn 15 in the yarn suction tube 13.

[0035] In other doffing trolleys, there is no tension compensation device like the suction head 1.

[0036] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that those skilled in the art may make to some parts thereof all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A tension compensation device for a doffing trolley, used for being installed on the doffing trolley, the doffing trolley having a yarn suction tube (13), the yarn suction tube (13) being used for sucking the broken ends of the yarn during the doffing process, characterized in that: The tension compensation device comprises a movable suction head (1), wherein the suction head (1) is located upstream of the yarn suction tube, the suction head (1) is communicated with a suction port (101) capable of generating negative pressure, the suction port (101) can hold the yarn (15) while the yarn suction tube sucks the broken end of the yarn, so as to suck the yarn (15) and generate a certain tension on the yarn (15), the suction head (1) has a working state and a standby state, and the suction head (1) can be moved and switched between the working state and the standby state.

2. A doffing trolley tension compensation device according to claim 1, characterized in that: Also includes: Bottom plate (2); A rotating seat (3), the suction head (1) is mounted on the rotating seat (3), and the rotating seat (3) and the bottom plate (2) are rotatably connected; A driving mechanism is drivably connected to the rotating seat (3) and is used to drive the rotating seat (3) to rotate, so as to drive the suction head (1) to move and switch between a working state and a standby state.

3. A doffing trolley tension compensation device according to claim 2, characterized in that: A fixing plate (10) is arranged on the bottom plate (2); the output end of the driving mechanism is hinged to the rotating seat (3) via a connecting piece, and the tail end is hinged to the fixing plate (10).

4. A doffing trolley tension compensation device according to claim 3, characterized in that: The output end of the driving mechanism is connected to a connecting rod (8), and a connecting piece (9) is provided on the rotating seat (3). One end of the connecting piece (9) is fixedly connected to the rotating seat (3), and the other end has a hinge hole, and the connecting rod (8) is hinged to the hinge hole.

5. A doffing trolley tension compensation device according to claim 2, characterized in that: A fixing block (5) is provided on the bottom plate (2), and limiting bolts (6) are provided on adjacent two sides of the fixing block (5), and the limiting bolts (6) are threadedly connected to the fixing block (5). Limiting members (7) are provided at both ends of the rotating seat (3), and during the rotation of the rotating seat (3), the two limiting members (7) can respectively contact with the two limiting bolts (6) to adjust and control the rotation angle of the suction head (1).

6. A doffing trolley tension compensation device according to claim 1, characterized in that: A throttle valve (12) is installed on one end of the suction head (1) away from the suction port (101), and the throttle valve (12) is used to be connected to a negative pressure generating device.

7. A doffing trolley tension compensation device according to claim 6, characterized in that: The throttle valve (12) is integrated with a pressure sensor for detecting negative pressure.

8. The doffing trolley tension compensation device according to claim 1, characterized in that: The suction port (101) is provided on the outer side of the suction head (1) near the front end.

9. A doffing trolley tension compensation device according to claim 8, characterized in that: The outer side of the suction head (1) is provided with a notch near the front end to form the suction port (101), and the notch is provided with a guide slope (1011) near the two ends of the suction head (1), and the two guide slopes (1011) extend obliquely toward the center of the notch.

10. A doffing trolley tension compensation device according to claim 1, characterized in that: The front end surface of the suction head (1) has the suction port (101), and one end of the suction port (101) is bent toward the side where the yarn (15) is located.

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