A knitting needle monitoring sensor and its lens cleaning device

Abstract

The present invention discloses a knitting needle monitoring sensor and a lens cleaning device thereof. The lens cleaning device includes a cleaning diversion cover, a lens sleeve, and an air inlet pipe. The sensor includes a lens, a sensor circuit, a focusing lens, a circuit sleeve, a cable, and the above-mentioned lens cleaning device. The present invention designs a cleaning diversion cover, which not only facilitates the cleaning of the focusing lens by gas but also protects the focusing lens. The present invention is provided with a baffle and a gas-gathering ring, so that the cleaning gas accelerated and ejected from the air jet port does not converge at the center of the focusing lens, but converges and collides on the side of the focusing lens away from the baffle, forming a jet airflow deviating from the central area of the focusing lens. Therefore, the cleaning blind area of the airflow is located outside the effective light-transmitting area of the focusing lens, realizing the cleaning of the effective light-transmitting area of the focusing lens by the cleaning gas, avoiding the formation of dust accumulation in the effective light-transmitting area, and having an excellent cleaning effect.

Description

Technical Field

[0001] The present invention relates to the field of broken needle monitoring of circular knitting machines, and specifically to a knitting needle monitoring sensor and a lens cleaning device thereof. Background Art

[0002] During the operation of a circular knitting machine, knitting needles with a needle hook at one end reciprocate to hook the yarn, and pull the yarn into coils or various structures to form knitted fabrics. Once a knitting needle is damaged, such as the needle hook breaks or bends excessively and is not detected, the actions of hooking and pulling the yarn are not completed, continuous defects or gaps will occur on the fabric, seriously affecting the quality of the fabric, reducing the yield of the fabric product, and greatly increasing the production cost. Therefore, it is necessary to monitor the state of the knitting needles in real time during the operation of the circular knitting machine, and immediately alarm and stop the operation of the circular knitting machine after detecting the damage or abnormality of the knitting needles, so as to replace or reinspect the knitting needles. Traditional monitoring mostly uses manual detection, which has the disadvantages of high cost, great influence of human factors, and difficult to guarantee quality.

[0003] The principle of broken needle detection of the existing circular knitting machine knitting needle monitor is as follows: the light emitted by the light source irradiates on the needle hook through the incident light. A normal needle hook can reflect the light, and then it is transmitted to the photoelectric conversion circuit through the optical fiber to generate an electrical signal. However, when the needle hook breaks or bends excessively, it cannot reflect the light, that is, no electrical signal can be output, and this method is used to achieve broken needle detection. However, in actual production, the circular knitting machine will generate flying fibers and oil mists, which will contaminate the lens of the detection equipment, resulting in false detection, not only affecting the work efficiency, but also generating stop marks on the fabric surface, affecting the product quality. At present, manual cleaning is mostly used. Therefore, it is very important to develop a lens cleaning device for a knitting needle monitoring device. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a knitting needle monitoring sensor and a lens cleaning device thereof.

[0005] The technical solution for the present invention to solve the technical problem of the device is to provide a lens cleaning device for a knitting needle monitoring sensor, which is characterized in that the lens cleaning device includes a cleaning diversion cover, a lens sleeve and an air inlet pipe;

[0006] A plurality of support blocks are arranged along the circumferential direction on the inner wall of the cleaning diversion cover; the cleaning diversion cover is nested outside the lens sleeve, and the support blocks are in contact with the outer wall of the lens sleeve, so that there is a gap between the inner wall of the cleaning diversion cover and the outer wall of the lens sleeve to form an air chamber;

[0007] The top of the cleaning diversion cover is provided with an opening, and a gas gathering ring extending into the hole is arranged along the circumferential direction of the top of the cleaning diversion cover. A baffle extending into the hole is arranged on the gas gathering ring, thus forming a through hole one;

[0008] The top of the lens barrel is provided with a second through hole; several grooves are circumferentially formed at the top of the lens barrel; the air-gathering ring cooperates with the grooves to form an air jet port;

[0009] An air inlet is arranged on the cleaning deflector; one end of the air inlet pipe is communicated with the air inlet, and the other end is communicated with an external air source; the inlet of the air chamber is communicated with the air inlet, and the outlet is communicated with the air jet port.

[0010] The technical solution for the present invention to solve the above-mentioned sensor technical problem is to provide a knitting needle monitoring sensor, which is characterized in that the sensor includes a lens, a sensor circuit, a focusing lens, a circuit barrel, a cable and the above-mentioned lens cleaning device;

[0011] The bottom of the lens barrel is detachably fixed on the circuit barrel, and a focusing lens is nested at the second through hole at the top to form a lens; the air inlet pipe is fixed on the circuit barrel; electronic components of the sensor circuit are placed in the circuit barrel; the electronic components are communicatively connected with an external central control through a cable.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] (1) The present invention designs a cleaning deflector, which not only facilitates the cleaning of the focusing lens by gas, but also has a protective effect on the focusing lens.

[0014] (2) The present invention is provided with a baffle and an air-gathering ring, so that the cleaning gas accelerating and ejected from the air jet port does not converge at the center of the focusing lens, but converges and collides on the side of the focusing lens far from the baffle, forming a jet airflow deviating from the central area of the focusing lens. Therefore, the cleaning blind area of the airflow is located outside the effective light-transmitting area of the focusing lens, realizing the cleaning of the effective light-transmitting area of the focusing lens by the cleaning gas, avoiding the formation of dust accumulation in the effective light-transmitting area, and having an excellent cleaning effect.

[0015] (3) The cleaning airflow is directly opposite to the head of the knitting needle, and the oil mist can effectively lubricate the needle tongue, solving the problem that it is difficult to lubricate the needle tongue during high-speed movement, prolonging the service life of the knitting needle and improving the fabric surface quality. Description of the Drawings

[0016] Figure 1 is a three-dimensional view of the overall structure of the knitting needle monitoring sensor of the present invention;

[0017] Figure 2 is a longitudinal sectional view of the overall structure of the knitting needle monitoring sensor of the present invention;

[0018] Figure 3 is for the present invention Figure 2 partial enlarged schematic diagram;

[0019] Figure 4 is for the present invention Figure 3Partial enlarged view and cleaning principle diagram;

[0020] Figure 5 Perspective three-dimensional view of the overall structure of the cleaning deflector of the present invention;

[0021] Figure 6 Bottom view of the overall structure of the cleaning deflector of the present invention;

[0022] Figure 7 Perspective three-dimensional view of the overall structure of the lens sleeve of the present invention;

[0023] Figure 8 Schematic diagram of the shielding range of the baffle of the present invention.

[0024] In the figure, cleaning deflector 1, lens sleeve 2, intake pipe 3, focusing lens 4, circuit sleeve 5, cable 6, air chamber 7, air jet port 8; intake port 11, support block 12, air gathering ring 13, baffle 14, through hole one 15; through hole two 21, groove 22; primary gas acceleration chamber 71, air passage 72, secondary gas acceleration chamber 73. Detailed implementation mode

[0025] The following gives specific embodiments of the present invention. The specific embodiments are only used to further elaborate the present invention in detail and do not limit the protection scope of the claims of this application.

[0026] The present invention provides a lens cleaning device for a knitting needle monitoring sensor (referred to as the lens cleaning device), which is characterized in that the lens cleaning device includes a cleaning deflector 1, a lens sleeve 2 and an intake pipe 3;

[0027] A plurality of support blocks 12 are evenly arranged along the circumference of the inner wall of the cleaning deflector 1; the cleaning deflector 1 is nested outside the lens sleeve 2, and the support block 12 contacts the outer wall of the lens sleeve 2, so that there is a gap between the inner wall of the cleaning deflector 1 and the outer wall of the lens sleeve 2 to form an air chamber 7 for the flow and uniform mixing of cleaning gas;

[0028] The top of the cleaning deflector 1 is provided with an opening, and a circle of air gathering rings 13 extending into the hole are arranged along the circumference of the top of the cleaning deflector 1. The air gathering ring 13 is provided with a baffle 14 extending into the hole, thereby forming a through hole one 15 (the through hole one 15 is the position in the opening where there is no air gathering ring 13 and baffle 14). The through hole one 15 is used for the outflow of cleaning gas from the lens cleaning device and the passage of knitting needle monitoring light (that is, the auxiliary illumination light emitted by the knitting needle monitoring sensor and the light returned from the needle hook of the knitting needle);

[0029] A through hole two 21 is opened at the top of the lens barrel 2 for the passage of the light for knitting needle monitoring; a plurality of grooves 22 are evenly opened along the circumferential direction at the top of the lens barrel 2; the air collecting ring 13 and the grooves 22 cooperate to form an air jet port 8 for jetting air to the outer side surface of the focusing lens 4 of the knitting needle monitoring sensor;

[0030] An air inlet 11 is provided on the cleaning diversion cover 1 (in this embodiment: the air inlet 11 is provided at the bottom of the cleaning diversion cover 1); one end of the air inlet pipe 3 is communicated with the air inlet 11, and the other end is communicated with an external air source (the air compressor pump of the knitting machine in this embodiment); the inlet of the air chamber 7 is communicated with the air inlet 11, and the outlet is communicated with the air jet port 8.

[0031] Preferably, the number of the support blocks 12 is 3 to 7, and they are evenly arranged, preferably 3.

[0032] Preferably, the number of the grooves 22 is 3 to 7, and they are evenly arranged, preferably 3.

[0033] Preferably, the cleaning gas is an oil mist formed by mixing compressed air and cleaning oil. The cleaning oil adopts a low-viscosity knitting oil with low viscosity, water-emulsifying, rust-proof and lubricating properties.

[0034] Preferably, the area ratio of the baffle 14 to the through hole one 15 is 3 to 8:12 to 17.

[0035] Preferably, through the structural and positional design of the inner wall of the cleaning diversion cover 1, the outer wall of the lens barrel 2 and the support blocks 12, the air chamber 7 is divided into a first-stage gas acceleration chamber 71, an air passage 72 and a second-stage gas acceleration chamber 73 that are connected to each other from bottom to top, so that the air chamber 7 has a gas acceleration function; an air passage 72 is formed at the gap between the inner wall of the cleaning diversion cover 1 and the outer wall of the lens barrel 2 at the support blocks 12, and N support blocks 12 form N air passages 72; the lower end of the first-stage gas acceleration chamber 71 is communicated with the air inlet 11, and the upper end is communicated with the lower end of the air passage 72; at the first-stage gas acceleration chamber 71, the distance between the inner wall of the cleaning diversion cover 1 and the outer wall of the lens barrel 2 is larger and greater than the distance at the air passage 72 for the primary acceleration of the cleaning gas; the lower end of the second-stage gas acceleration chamber 73 is communicated with the upper end of the air passage 72, and the upper end is communicated with the air jet port 8; at the second-stage gas acceleration chamber 73, the distance between the inner wall of the cleaning diversion cover 1 and the outer wall of the lens barrel 2 is smaller and less than the distance at the air passage 72 for the secondary acceleration of the cleaning gas;

[0036] The present invention also provides a knitting needle monitoring sensor (referred to as a sensor), which is characterized in that the sensor includes a lens, a sensor circuit, a focusing lens 4, a circuit sleeve 5, a cable 6 and the above-mentioned lens cleaning device;

[0037] The bottom of the lens barrel 2 is detachably fixed to the circuit barrel 5. A focusing lens 4 is nested at the through hole 21 at the top to form a lens. The air inlet pipe 3 is fixed to the circuit barrel 5. Electronic components of the sensor circuit are placed inside the circuit barrel 5. The electronic components are communicatively connected to an external central control through a cable 6.

[0038] Preferably, the electronic components include a light source, a photoelectric converter, a filtering and shaping circuit, an amplifying circuit, an output interface, etc.

[0039] The working principle and working process of the present invention are as follows:

[0040] During the knitting needle monitoring process, when the focusing lens 4 needs to be cleaned due to contamination, the circuit inside the circuit barrel 5 sends a signal. The external central control receives the signal and controls the start of an external gas source. The gas for cleaning (hereinafter referred to as the cleaning gas) enters the gas chamber 7 through the air inlet pipe 3 and the air inlet 11. After being mixed in the gas chamber 7, it is evenly ejected from the air jet port 8 and blows towards the outer side surface of the focusing lens 4 to clean the focusing lens 4. Due to the functions of the baffle 14 and the air gathering ring 13, the cleaning gas ejected from the air jet port 8 does not converge at the center of the focusing lens 4, but converges and collides on the side of the focusing lens 4 away from the baffle 14, forming an outward jetting air flow deviating from the central area of the focusing lens 4. Therefore, the cleaning blind area of the air flow is located outside the effective light transmission area of the focusing lens 4 ( Figure 8 inside the virtual circle in, and the effective light transmission area of the focusing lens 4 is located in the central area of the focusing lens 4), realizing the cleaning of the effective light transmission area of the focusing lens 4 by the cleaning gas and avoiding the formation of dust accumulation in the effective light transmission area. In addition, due to the wall attachment effect, the high-speed air flow moves closely along the focusing lens 4, further improving the cleaning effect of the effective light transmission area of the focusing lens 4.

[0041] Preferably, during the knitting needle monitoring process, when the focusing lens 4 needs to be cleaned due to contamination, the circuit inside the circuit barrel 5 sends a signal. The external central control receives the signal and controls the start of an external gas source. The gas for cleaning (hereinafter referred to as the cleaning gas) enters the gas chamber 7 through the air inlet pipe 3 and the air inlet 11. First, it flows into the first-stage gas acceleration chamber 71. After being evenly mixed in the first-stage gas acceleration chamber 71, it is accelerated by the first-stage gas acceleration chamber 71 and then flows into the second-stage gas acceleration chamber 73 through the air passage 72 formed by the support block 12. After being evenly mixed in the second-stage gas acceleration chamber 73, it is accelerated by the second-stage gas acceleration chamber 73, and the cleaning gas is evenly ejected from the air jet port 8 and blows towards the outer side surface of the focusing lens 4 to clean the focusing lens 4. Due to the functions of the baffle 14 and the air gathering ring 13, the cleaning gas ejected from the air jet port 8 does not converge at the center of the focusing lens 4, but converges and collides on the side of the focusing lens 4 away from the baffle 14, forming an outward jetting air flow deviating from the central area of the focusing lens 4. Therefore, the cleaning blind area of the air flow is located outside the effective light transmission area of the focusing lens 4 (Figure 8 Inside the virtual circle, the effective light-transmitting area of the focusing lens 4 is located outside the central area of the focusing lens 4), realizing the cleaning of the effective light-transmitting area of the focusing lens 4 by the cleaning gas and avoiding the formation of dust accumulation in the effective light-transmitting area; in addition, due to the wall attachment effect, the high-speed air flow moves closely along the focusing lens 4, further improving the cleaning effect of the effective light-transmitting area of the focusing lens 4.

[0042] What is not described in the present invention applies to the prior art.

Claims

1. A lens cleaning device for a knitting needle monitoring sensor, characterized in that, The lens cleaning device includes a cleaning air guide cover (1), a lens sleeve (2), and an air inlet pipe (3); A plurality of support blocks (12) are circumferentially arranged on the inner wall of the cleaning air guide cover (1); the cleaning air guide cover (1) is nested outside the lens sleeve (2), and the support blocks (12) are in contact with the outer wall of the lens sleeve (2), so that there is a gap between the inner wall of the cleaning air guide cover (1) and the outer wall of the lens sleeve (2) to form an air chamber (7); The top of the cleaning air guide cover (1) is provided with an opening, and a gas gathering ring (13) extending into the hole is arranged circumferentially along the top of the cleaning air guide cover (1). A baffle (14) extending into the hole is arranged on the gas gathering ring (13), thereby forming a first through hole (15); A second through hole (21) is opened at the top of the lens sleeve (2); a plurality of grooves (22) are circumferentially opened at the top of the lens sleeve (2); the gas gathering ring (13) and the grooves (22) cooperate to form a jet orifice (8); An air inlet (11) is arranged on the cleaning air guide cover (1); one end of the air inlet pipe (3) is communicated with the air inlet (11), and the other end is communicated with an external air source; the inlet of the air chamber (7) is communicated with the air inlet (11), and the outlet is communicated with the jet orifice (8); Due to the action of the baffle (14) and the gas gathering ring (13), the cleaning gas accelerated and ejected from the jet orifice (8) converges and collides on the side of the focusing lens (4) away from the baffle (14), forming an outward jetting air flow deviating from the central area of the focusing lens (4). Therefore, the cleaning blind area of the air flow is located outside the effective light transmission area of the focusing lens (4), realizing the cleaning of the effective light transmission area of the focusing lens (4) by the cleaning gas.

2. The lens cleaning device of the knitting needle monitoring sensor according to claim 1, characterized in that, The number of the support blocks (12) is 3 to 7, and they are evenly distributed.

3. The lens cleaning device of the knitting needle monitoring sensor according to claim 1, characterized in that, The number of the grooves (22) is 3 to 7, and they are evenly distributed.

4. The lens cleaning device of the knitting needle monitoring sensor according to claim 1, characterized in that, The area ratio of the baffle (14) to the first through hole (15) is 3 to 8:12 to 17.

5. The lens cleaning device of the knitting needle monitoring sensor according to claim 1, characterized in that, The air chamber (7) is divided into a first-stage gas acceleration chamber (71), an air passage (72), and a second-stage gas acceleration chamber (73) that are communicated with each other from bottom to top; the gap between the inner wall of the cleaning air guide cover (1) and the outer wall of the lens sleeve (2) at the support block (12) forms the air passage (72); the lower end of the first-stage gas acceleration chamber (71) is communicated with the air inlet (11), and the upper end is communicated with the lower end of the air passage (72); at the first-stage gas acceleration chamber (71), the distance between the inner wall of the cleaning air guide cover (1) and the outer wall of the lens sleeve (2) is greater than the distance at the air passage (72), which is used for the primary acceleration of the cleaning gas; The lower end of the second-stage gas acceleration chamber (73) is communicated with the upper end of the air passage (72), and the upper end is communicated with the jet orifice (8); at the second-stage gas acceleration chamber (73), the distance between the inner wall of the cleaning air guide cover (1) and the outer wall of the lens sleeve (2) is less than the distance at the air passage (72), which is used for the secondary acceleration of the cleaning gas.

6. The lens cleaning device of the knitting needle monitoring sensor according to claim 5, characterized in that, N support blocks (12) form N air passages (72).

7. A knitting needle monitoring sensor, characterized in that, The sensor includes a lens, a sensor circuit, a focusing lens, a circuit sleeve, a cable, and the lens cleaning device according to any one of claims 1-6; The bottom of the lens barrel (2) is detachably fixed to the circuit barrel, and a focusing lens is nested at the through hole two (21) at the top to form a lens; the air inlet pipe (3) is fixed to the circuit barrel; electronic components of the sensor circuit are placed inside the circuit barrel; the electronic components are communicatively connected to an external central control through a cable.

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