Powder suction device

Abstract

The application belongs to the technical field of cable manufacturing, and discloses a powder suction device. The powder suction device comprises a body and a separation piece. The body has a channel for cable threading, and the body has a high-pressure cavity and a low-pressure cavity inside. The separation piece is arranged inside the body, and has an inner cavity which constitutes part of the channel. The separation piece and the body define the high-pressure cavity therebetween, and the low-pressure cavity is in communication with the inner cavity. The separation piece is provided with a flow hole, and the high-pressure cavity is in communication with the inner cavity through the flow hole. The sweep gas introduced into the high-pressure cavity can enter the inner cavity through the flow hole after being pressurized, and carry away the powder attached to the surface of the part of the cable placed in the inner cavity. Through the application, the powder layer on the surface of the cable is thinned, the product quality is improved, and the overall device structure is simple.

Description

Technical Field

[0001] This invention relates to the field of cable manufacturing technology, and in particular to a powder suction device. Background Technology

[0002] In the cable manufacturing industry, certain types of cable products require surface treatment processes during production due to their material properties. Taking silicone rubber insulated cables as an example, the strong intermolecular forces in the silicone rubber substrate result in high adhesion on the surface after high-temperature vulcanization. This physical characteristic makes the cables prone to self-adhesion during the winding and packaging process, affecting subsequent processing efficiency and causing damage to the cable insulation surface. Therefore, the industry's conventional solution is to apply a talc powder layer to the cable surface before winding using a powder coating machine. The talc powder's lamellar crystalline structure and hydrophobic properties create a physical barrier.

[0003] Traditional powder coating machines, which use gravity settling or brush coating methods, struggle to achieve precise thickness control. When excessive powder is supplied, a layer exceeding 50μm in thickness can form on the cable surface, not only wasting raw materials but also potentially causing insulation failures in electrical equipment due to powder shedding. Especially for fine wires with diameters below 0.5mm, existing equipment can only achieve a powder layer thickness control accuracy of ±15μm, failing to meet the stringent surface treatment quality requirements of high-end cable products. Summary of the Invention

[0004] The purpose of this invention is to provide a powder suction device for blowing away talc powder on the surface of cables, reducing the powder layer thickness and improving product quality.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The powder suction device includes:

[0007] The body has a channel for cables to pass through, and the body has a high-voltage chamber and a low-voltage chamber inside;

[0008] An isolating element is disposed inside the main body. The isolating element has an inner cavity that forms part of the channel. The isolating element and the main body define the high-pressure chamber. The low-pressure chamber communicates with the inner cavity. The isolating element is provided with a flow hole, through which the high-pressure chamber communicates with the inner cavity.

[0009] The purging gas introduced into the high-pressure chamber can be pressurized through the flow hole and enter the inner cavity, carrying away the surface powder of the part of the cable placed in the inner cavity.

[0010] As an alternative to the powder suction device, the plurality of flow holes are arranged in a spiral pattern at intervals along the wall of the separator.

[0011] As an alternative to the powder suction device, the diameter of the flow hole gradually decreases from the outside to the inside along the isolation member.

[0012] As an alternative to the powder suction device, the main body is provided with two low-pressure chambers, which are respectively connected to both sides of the inner cavity along the cable running direction.

[0013] As an alternative to the powder suction device, the main body is provided with an air inlet, which is connected to the high-pressure chamber and is used to introduce the purging gas.

[0014] As an alternative to the powder suction device, the powder suction device further includes a blower and a first pipe, with the two ends of the first pipe connected to the blower and the air inlet, respectively.

[0015] As an alternative to the powder suction device, the main body is provided with a separator, which is sleeved on the isolation member. The separator is used to separate the interior of the main body to form the high-pressure chamber and the low-pressure chamber.

[0016] As an alternative to the powder suction device, the main body is provided with an air outlet that communicates with the low-pressure chamber, and the powder carried away by the purge gas is discharged through the air outlet.

[0017] As an alternative to the powder suction device, the powder suction device further includes an air extraction component and a second pipe, with the two ends of the second pipe connected to the air extraction component and the air outlet, respectively.

[0018] As an alternative to the powder suction device, the powder suction device includes an end plate, which is detachably connected to the body. A low-pressure cavity is formed between the end plate and the isolation member, and a through hole is provided on the end plate for inserting the cable.

[0019] Beneficial effects:

[0020] In this invention, an inner cavity is formed inside the insulating component, with an inner diameter larger than that of the cable, allowing the cable to pass through. The low-pressure chamber is connected to the inner cavity, and a flow-through hole connects the high-pressure chamber to the inner cavity. When purge gas is introduced into the high-pressure chamber, the pressure inside the inner cavity is lower than that in the high-pressure chamber due to the connection between the inner and low-pressure chambers. Therefore, the purge gas enters both the inner and low-pressure chambers through the flow-through hole. Simultaneously, the purge gas is pressurized and accelerated as it passes through the flow-through hole, forming a high-speed purge airflow that accumulates in the inner cavity. Excess powder on the cable surface is blown away by this high-speed purge airflow, thus reducing the powder layer on the cable surface and improving product quality. Attached Figure Description

[0021] Figure 1This is a partial cross-sectional view of the powder suction device provided in an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the powder suction device provided in an embodiment of the present invention.

[0023] In the picture:

[0024] 100. Cables;

[0025] 1. Main body; 11. Channel; 12. High-pressure chamber; 13. Low-pressure chamber; 14. Air inlet; 15. Separator; 16. Air outlet;

[0026] 2. Isolation component; 21. Inner cavity; 22. Flow hole; 3. Blower; 4. First pipe; 5. Extraction component; 51. Storage bag; 6. Second pipe; 7. End plate; 71. Perforation; 8. Input roller group; 81. Roller; 9. Output roller group. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0028] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0031] In existing technologies, powder coating machines have certain technical flaws. Their powder supply systems lack a dynamic adjustment mechanism, making it impossible to adjust the powder supply in real time according to the cable's operating speed. Furthermore, traditional brush or screen-type coating devices struggle to ensure uniform powder distribution, and are more prone to eddy current effects during high-speed production, leading to powder layer defects. The problem of excessively thick powder layers is particularly difficult to overcome, yet in talc powder coating processes, a thinner layer is preferable while still meeting usage requirements. This application provides a powder suction device to improve the problem of excessively thick talc powder layers in cables, thereby enhancing quality.

[0032] Please see the appendix Figure 1 - Appendix Figure 2 This embodiment relates to a powder suction device, including a body 1 and an isolator 2. The body 1 has a channel 11 through which a cable 100 passes, and an internal high-pressure chamber 12 and a low-pressure chamber 13. The isolator 2 is disposed inside the body 1 and has an inner cavity 21, which partially forms part of the channel 11. The high-pressure chamber 12 is defined between the isolator 2 and the body 1, and the low-pressure chamber 13 communicates with the inner cavity 21. The isolator 2 has a flow-through hole 22, through which the high-pressure chamber 12 communicates with the inner cavity 21. Purge gas introduced into the high-pressure chamber 12 can be pressurized through the flow-through hole 22 and enter the inner cavity 21, carrying away the powder adhering to the surface of a portion of the cable 100 placed in the inner cavity 21.

[0033] Specifically, the main body 1 has a cylindrical structure, which can be a cylindrical or prismatic tube. A connecting structure can be provided on the outer wall of the main body 1 to connect with a positioning platform or positioning bracket. The connecting structure can be a snap-fit ​​or screw-fit. The positioning platform or positioning bracket supports the main body 1 to keep it stable. Alternatively, the positioning platform or positioning bracket can integrate a height adjustment mechanism and connect to the main body 1, allowing the main body 1 to be adjusted in height. The main body 1 has a linear structure that extends along an axis. An internal channel 11 extending along this axis is formed within the main body 1. The two sides of the channel 11 are open to allow the cable 100 to pass through. Simultaneously, a high-pressure chamber 12 and a low-pressure chamber 13 are formed inside the main body 1. During operation of this powder suction device, the air pressure in the high-pressure chamber 12 is higher than the air pressure in the low-pressure chamber 13 to accelerate the airflow.

[0034] The isolator 2 is also a cylindrical structure. The isolator 2 can be a cylindrical or prismatic tube. The axis of the isolator 2 coincides with or is parallel to the axis of the body 1. To ensure centering and symmetry for easy positioning of the cable 100, this application uses an axis-coincident arrangement for the isolator 2 and the body 1. A high-pressure cavity 12 is formed between the outer wall of the isolator 2 and the inner wall of the body 1. Given the cylindrical structure of the isolator 2, the high-pressure cavity 12 is an annular chamber surrounding the outer periphery of the isolator 2. An inner cavity 21 is formed inside the isolator 2. The inner diameter of the inner cavity 21 is larger than the diameter of the cable 100, allowing the cable 100 to pass through the inner cavity 21. The low-pressure cavity 13 communicates with the inner cavity 21, and the flow hole 22 is used for communication between the high-pressure cavity 12 and the inner cavity 21.

[0035] In this embodiment, after the purge gas is introduced into the high-pressure chamber 12, since the inner chamber 21 is connected to the low-pressure chamber 13, the gas pressure in the inner chamber 21 is lower than that in the high-pressure chamber 12. Therefore, the purge gas will enter the inner chamber 21 and the low-pressure chamber 13 through the flow hole 22. At the same time, the purge gas is pressurized and accelerated when passing through the flow hole 22, forming a high-speed purge airflow that accumulates in the inner chamber 21. Excess powder on the surface of the cable 100 in the inner chamber 21 is blown away by the high-speed purge airflow, thereby reducing the powder layer on the surface of the cable 100 and improving product quality.

[0036] It should be noted that the length of the inner cavity 21 on the isolator 2 determines the effective purging length of the cable 100. The overall device is much smaller than the length of the cable 100. Therefore, in order to ensure that the powder layer of the cable 100 is thinned along its entire length, the cable 100 can be continuously transferred from one end of this powder suction device to the other end by a delivery mechanism, and a segmented thinning method can be adopted to ensure the structural compactness of the overall powder suction device.

[0037] In this embodiment, the delivery mechanism may include a conveyor roller or a conveyor roller group. Specifically, an input roller group 8 and an output roller group 9 are respectively provided at both ends of the main body 1. Both the input roller group 8 and the output roller group 9 include two saddle-shaped rollers 81, forming a clamping area between the two rollers 81, through which the cable 100 passes. A drive source can be connected to the output roller group 9. The drive source can be a rotary motor to drive the rollers 81 to rotate and drive the cable 100 forward through friction. Of course, other drive sources can also be used to contact part of the cable 100 structure and push the cable 100 through the main body 1. In this case, for the output roller group 9, the input roller group 8 is only used to support and guide the cable 100. The input roller group 8 may not have a drive source and is only used to support and guide the cable 100 output from the main body 1.

[0038] Optionally, multiple flow holes 22 are arranged in a spiral pattern at intervals along the wall of the isolation member 2.

[0039] In this embodiment, the flow passage 22 is a circular hole formed on the wall of the separator 2, with a very small diameter. This allows the airflow to pass through the flow passage 22 and enter the inner cavity 21, forming an inward jet of airflow with a certain impact force. By using a spiral pattern with intervals, the collision of high-speed airflows can be avoided, reducing self-interference of the airflow. In this embodiment, another reason for the increased airflow velocity entering the inner cavity 21 is that the cross-section of the inner cavity 21 is smaller than that of the high-pressure chamber 12. For the same flow rate, the velocity in the inner cavity 21 will increase, thus more effectively carrying away the talc powder.

[0040] It should be noted that when multiple flow passages 22 are arranged, the inner diameters of the flow passages 22 can be the same or different, the spacing between adjacent flow passages 22 can also be the same or different, and the density of the multiple flow passages 22 can be specifically selected or adjusted according to the processing conditions and pressurization effect. The multiple flow passages 22 can also be arranged in an approximate spiral pattern. This embodiment does not limit the specific diameter and layout of the flow passages 22.

[0041] Optionally, the diameter of the flow hole 22 gradually decreases from the outside to the inside along the direction of the isolation member 2.

[0042] Specifically, by gradually reducing the diameter of the flow passage 22 along the direction from the outside to the inside of the isolation member 2, the problem of increased fluid resistance caused by the step-like reduction of the diameter of the flow passage 22 can be effectively avoided. Therefore, while ensuring pressurization, the smoothness of airflow is improved.

[0043] It should be noted that the specific shape of the flow-through orifice 22 can be stepped columnar, conical, or approximately conical, and the centerline of the flow-through orifice 22 can be a straight line or a curve. The centerline of the flow-through orifice 22 can be perpendicular to the axis of the cable 100 or set at a certain angle to the axis of the cable 100. For the flow-through orifice 22 that is set at an angle relative to the axis of the cable 100, the airflow sweeping effect on the surface powder of the cable 100 can be further realized, thereby improving the efficiency of powder layer thinning.

[0044] Optionally, the main body 1 is provided with an air inlet 14, which is connected to the high-pressure chamber 12 and is used to introduce purging gas.

[0045] Specifically, an air inlet 14 is provided on the side wall of the main body 1. The air inlet 14 is a circular or elliptical hole and is centrally located relative to the axis of the isolation member 2 to ensure that the fluid parameters of the purge gas introduced into the air inlet 14 are the same on both sides. The air inlet 14 is connected to the high-pressure chamber 12 so that the purge gas enters the interior of the high-pressure chamber 12 after passing through the air inlet 14.

[0046] In one implementation of this embodiment, the aperture of the air inlet 14 is adjustable. By adjusting the aperture of the air inlet 14, the flow area can be adjusted, thereby regulating the airflow velocity entering the high-pressure chamber 12.

[0047] Furthermore, the powder suction device also includes a blower 3 and a first pipe 4, with the two ends of the first pipe 4 connected to the blower 3 and the air inlet 14, respectively.

[0048] Specifically, the first pipe 4 is in the form of a flexible hose, which allows for convenient and flexible arrangement of the blower 3, which can be a hair dryer. Existing structures can be used for the hair dryer; its specific working principle will not be elaborated in this embodiment. When installing the blower 3 and the first pipe 4, it is necessary to ensure that the interfaces correspond and are sealed to prevent air leakage. One end of the first pipe 4 is sealed to the air inlet 14, which can be achieved by using a sealing ring or adhesive sealant.

[0049] Optionally, the main body 1 has two low-pressure cavities 13 inside, and the two low-pressure cavities 13 are respectively connected to both sides of the inner cavity 21 along the direction of the cable 100.

[0050] Specifically, two low-pressure chambers 13 are symmetrically arranged on both sides of the high-pressure chamber 12 inside the main body 1. The two low-pressure chambers 13 are connected to both ends of the inner cavity 21. The cable 100 can first pass through one low-pressure chamber 13, extend into the inner cavity 21, and then exit from the other low-pressure chamber 13. The symmetrical layout of the two low-pressure chambers 13 can accommodate the long and straight structure of the cable 100, and also further improve the powder absorption efficiency of talc powder. The axial dimension of the low-pressure chamber 13 is smaller than that of the high-pressure chamber 12, which conforms to the actual flow ratio of high-pressure gas and low-pressure gas.

[0051] Optionally, the main body 1 is provided with an air outlet 16 that communicates with the low-pressure chamber 13, and the powder carried away by the purging gas is discharged through the air outlet 16.

[0052] Specifically, based on two symmetrically arranged low-pressure chambers 13, two air outlets 16 are provided on the main body 1, and the two air outlets 16 correspond to the two low-pressure chambers 13 respectively. The talc powder carried out by the purge gas can enter the low-pressure chambers 13 from both sides of the inner cavity 21 after passing through the inner cavity 21, and be discharged and collected through the air outlets 16.

[0053] Furthermore, the powder suction device also includes an air extraction component 5 and a second pipe 6, with the two ends of the second pipe 6 connected to the air extraction component 5 and the air outlet 16, respectively.

[0054] Specifically, two sets of suction components 5 and second pipes 6 are respectively provided to correspond to the two low-pressure chambers 13 and the two air outlets 16. The second pipe 6 is in the form of a flexible hose, which allows for convenient and flexible arrangement of the suction components 5. The suction components 5 can be vacuum pumps. Existing structures can be used for vacuum pumps, and their specific working principles will not be elaborated in this embodiment. When installing the suction components 5 and the second pipe 6, it is necessary to ensure that the interfaces correspond and are sealed to avoid air leakage. One end of the second pipe 6 is sealed to the air outlet 16, which can be achieved by using a sealing ring or adhesive sealant. The other side of the suction component 5 is also connected to a collection bag 51 for collecting the talcum powder blown from the second pipe 6.

[0055] Optionally, the main body 1 is provided with a partition 15, which is sleeved on the isolation member 2. The partition 15 is used to separate the interior of the main body 1 to form a high-pressure chamber 12 and a low-pressure chamber 13.

[0056] Specifically, the separator 15 has a plate-like structure. The separator 15 and the isolation component 2 can be connected by screwing, clamping, bonding, or welding, depending on the type of connecting material, the ease of connection, and the reliability. Of course, the separator 15 and the isolation component 2 can also be integrally molded, which can reduce the number of parts and assembly steps, and improve manufacturability.

[0057] Based on the layout of the two low-pressure cavities 13 in this embodiment, two partitions 15 are respectively sleeved on both sides of the isolation member 2, so that the high-pressure cavity 12 is formed by the outer wall of the isolation member 2, part of the inner wall of the body 1, and the two opposing partitions 15.

[0058] Optionally, the powder suction device includes an end plate 7, which is detachably connected to the body 1. A low-pressure cavity 13 is formed between the end plate 7 and the isolation member 2. The end plate 7 is provided with a through hole 71 for inserting the cable 100.

[0059] Specifically, the end plate 7, the separator 15, and part of the inner wall of the body 1 form a low-pressure cavity 13. The end plate 7 and the body 1 can be connected by threads or interference fit to achieve an easy-to-assemble and disassemble connection structure. By making the end plate 7 detachable, it is convenient for assembly personnel to assemble the separator 2 and the body 1. In addition, the inner diameter of the through hole 71 is larger than the overall outer diameter of the cable 100, so that the cable 100 is inserted from the through hole 71 on one side and led out from the through hole 71 on the other side.

[0060] The working steps of this powder suction device are as follows:

[0061] First, the cable 100, with a thick layer of talcum powder on its surface, passes through the input roller group 8, the main body 1, and the output roller group 9 in sequence.

[0062] Then, the blower 3 and the extractor 5 are activated. The blower 3 blows high-pressure purging gas through the first pipe 4 and the air inlet 14 into the high-pressure chamber 12, keeping the gas inside the high-pressure chamber 12 under high pressure. The extractor 5 extracts airflow outward through the air outlet 16 and the second pipe 6, keeping the gas inside the low-pressure chamber 13 and the inner chamber 21 under low pressure. This creates a large pressure difference between the inner chamber 21 and the high-pressure chamber 12, and the airflow enters the inner chamber 21 through the spirally arranged flow holes 22 on the wall of the isolator 2, forming a high-speed airflow that disperses and lifts the talcum powder on the surface of the cable 100. The lifted talcum powder follows the airflow to the low-pressure chambers 13 at both ends, and then flows through the second pipe 6 to the storage bag 51.

[0063] By controlling the rotation speed of the blower 3 or adjusting the size of the air inlet 14, the airflow rate can be controlled, thereby controlling the amount of residual talcum powder on the surface of the cable 100.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A powder suction device, characterized in that, include: The body (1) has a channel (11) for the cable (100) to pass through, and the body (1) has a high-voltage chamber (12) and a low-voltage chamber (13) inside; An isolation element (2) is disposed inside the body (1). The isolation element (2) has an inner cavity (21). The inner cavity (21) forms part of the channel (11). The isolation element (2) and the body (1) define the high-pressure cavity (12). The low-pressure cavity (13) communicates with the inner cavity (21). The isolation element (2) is provided with a flow hole (22). The high-pressure cavity (12) communicates with the inner cavity (21) through the flow hole (22). The purging gas introduced into the high-pressure chamber (12) can be pressurized through the flow hole (22) and enter the inner cavity (21), and carry away the surface powder of the part of the cable (100) placed in the inner cavity (21).

2. The powder suction device according to claim 1, characterized in that, The multiple flow holes (22) are distributed in a spiral pattern at intervals along the wall of the isolation member (2).

3. The powder suction device according to claim 1, characterized in that, The diameter of the flow passage (22) gradually decreases from the outside to the inside along the isolation member (2).

4. The powder suction device according to claim 1, characterized in that, The main body (1) has two low-pressure cavities (13) inside, and the two low-pressure cavities (13) are respectively connected to the two sides of the inner cavity (21) along the direction of the cable (100).

5. The powder suction device according to claim 1, characterized in that, The main body (1) is provided with an air inlet (14), which is connected to the high-pressure chamber (12) and is used to introduce the purging gas.

6. The powder suction device according to claim 5, characterized in that, The powder suction device also includes a blower (3) and a first pipe (4), with the two ends of the first pipe (4) connected to the blower (3) and the air inlet (14), respectively.

7. The powder suction device according to claim 1, characterized in that, The body (1) is provided with a partition (15), which is sleeved on the isolation member (2). The partition (15) is used to separate the interior of the body (1) to form the high-pressure chamber (12) and the low-pressure chamber (13).

8. The powder suction device according to claim 1, characterized in that, The main body (1) is provided with an air outlet (16) that communicates with the low-pressure chamber (13), and the powder carried away by the purging gas is discharged through the air outlet (16).

9. The powder suction device according to claim 8, characterized in that, The powder suction device also includes an air extraction component (5) and a second pipe (6), with the two ends of the second pipe (6) connected to the air extraction component (5) and the air outlet (16), respectively.

10. The powder suction device according to claim 1, characterized in that, The powder suction device includes an end plate (7), which is detachably connected to the body (1). The low-pressure cavity (13) is formed between the end plate (7) and the isolation member (2). The end plate (7) has a through hole (71) for inserting the cable (100).

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