Detection device for hollow fiber spinneret and working method thereof

Abstract

The present application belongs to the technical field of measurement, and particularly relates to gas flow measurement, and especially relates to a detection device for a hollow fiber spinneret and a working method thereof. The detection device for the hollow fiber spinneret is provided with a detection part, which is used for sequentially ventilating each spinning hole when detecting the spinning hole at a spinning position, and the remaining spinning holes are blocked when one spinning hole is ventilated. A control module is used for controlling a sensor assembly to detect the gas flow of each spinning hole, so as to determine whether each spinning hole is qualified, and the gas flow of a single spinning hole is obtained, and it is convenient to accurately determine whether each spinning hole is qualified.

Description

Technical Field

[0001] This invention belongs to the field of measurement technology, specifically relating to the measurement of gas flow rate, and more particularly to a detection device for hollow fiber spinnerets and its working method. Background Technology

[0002] A hollow fiber spinneret is a precision spinning die specifically designed to extrude hollow tubular fibers. When polymer melt is extruded through its spinneret orifices, it forms hollow cross-section fiber filaments. Therefore, the spinnerets on a hollow fiber spinneret are not traditionally circular, but rather composed of multiple discontinuous arc-shaped slits. After a period of use, the spinneret needs to be cleaned and inspected to ensure the uniformity of its arc-shaped slits. In related technologies, airflow detection is used to determine whether the uniformity of the multiple arc-shaped slits in a group of spinnerets is consistent by acquiring airflow stability data for each group of spinnerets. However, this method still has some problems. Because the arc-shaped slits are small, it is impossible to acquire individual airflow data for each arc-shaped slit; only data for a group of spinnerets can be acquired. This means that if the flow rate of one arc-shaped slit in a group of spinnerets increases while the flow rate of another decreases, the final result will show that the two cancel each other out, resulting in stable flow data and leading to false detections.

[0003] Therefore, due to the overall gas flow rate data acquisition of a set of spinnerets, if the flow rate of one of the multiple arc-shaped slits in a set of spinnerets increases while the flow rate of another slit decreases, the final result will show that the two cancel each other out, resulting in stable flow rate data and causing false detections. Therefore, it is necessary to design a new detection device and its working method for hollow fiber spinnerets.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one detection device for hollow fiber spinnerets and its operating method.

[0006] In a first aspect, embodiments of this disclosure provide a detection device for hollow fiber spinnerets, comprising:

[0007] The detection unit is located above the spinneret, which has several spinneret positions, each consisting of several spinneret holes. Below each spinneret position is a sensor assembly electrically connected to a control module. The sensor assembly completely covers the spinneret holes corresponding to the currently detected spinneret position. The detection unit is configured to sequentially introduce air into each spinneret hole while detecting one spinneret position. When air is introduced into one spinneret hole, the remaining spinneret holes are blocked. The control module controls the sensor assembly to detect the flow rate of the gas exiting each spinneret hole to determine whether each spinneret hole is qualified.

[0008] In one optional embodiment, the detection unit includes: a connecting shaft, and a disk disposed at the bottom of the connecting shaft;

[0009] The connecting shaft is connected to the drive motor;

[0010] The disc body is provided with a vent hole adapted to the spinneret hole, and the bottom surface of the disc body is provided with a groove adapted to the spinneret hole. The distance between the vent hole and the groove is the same as the distance between two adjacent spinnerets in the spinneret position.

[0011] The drive motor is electrically connected to the control module;

[0012] The control module is configured to control the drive motor to drive the connecting shaft to rotate, so that the disc rotates. When the vent hole is aligned with the spinneret hole, the groove covers the next aligned spinneret hole of the vent hole.

[0013] In one optional embodiment, the interior of the disc body is provided with a herringbone-shaped flow channel, one bottom opening of which is connected to a vent hole, the other bottom opening of which is connected to a groove, and the top opening of the flow channel is located on the side wall of the disc body.

[0014] In one optional embodiment, the disc body is fitted with a sleeve, the bottom surface of the sleeve is open, and the bottom surface of the disc body and the bottom surface of the sleeve are on the same plane;

[0015] The outer wall of the disc body contacts the inner wall of the sleeve, and the disc body is adapted to rotate relative to the sleeve;

[0016] The sleeve sidewall is provided with a plurality of air outlets, which are adapted to the opening at the top of the flow channel and are located at the same height;

[0017] The sleeve has an air inlet on its side wall, which is higher than the top surface of the disc and is connected to an air source.

[0018] The top surface of the sleeve has a through hole, the connecting shaft extends out of the through hole, and a sealing ring is provided between the connecting shaft and the through hole;

[0019] The top surface of the sleeve is provided with several connecting rods, which are connected to the housing of the drive motor.

[0020] In one optional implementation, at the start of the test, the bottom surface of the disc contacts the top surface of the spinneret. The control module is configured to control the drive motor to rotate the connecting shaft, so that the vent hole is aligned with the part of the spinneret without spinneret holes. At this time, the groove covers the first spinneret hole to be tested, and the opening at the top of the flow channel is aligned with the corresponding air outlet. The air source passes through the air inlet into the sleeve. The gas enters the vent hole and is blocked by the part of the spinneret without spinneret holes. The gas flows into the flow channel from the vent hole and the part connecting the flow channel, and then flows out from the opening at the top of the flow channel. At this time, the part connecting the groove and the flow channel is under negative pressure, which causes gas to flow into the part connecting the groove and the flow channel in the spinneret hole corresponding to the groove. The flowing gas removes impurities in the spinneret hole corresponding to the groove.

[0021] In one optional implementation, after impurities are removed from the first spinneret to be tested, the control module is configured to control the drive motor to rotate the connecting shaft so that the vent is aligned with the first spinneret to be tested. At this time, the groove is blocked by the part without a spinneret hole, the opening at the top of the flow channel is aligned with the side wall of the sleeve, the opening at the top of the flow channel is closed, the air source is vented into the sleeve through the air inlet, and the gas flows out from the aligned spinneret hole after entering the vent. The sensor assembly below the spinneret hole detects the flow rate of the gas flowing out of the spinneret hole. When the detected flow rate is the same as the preset flow rate, the control module determines that the currently tested spinneret hole is qualified.

[0022] In one alternative implementation, after one spinneret hole is detected, the control module is configured to control the drive motor to rotate the connecting shaft so that the groove is aligned with the next spinneret hole to be detected. The vent hole is blocked by the part of the spinneret hole that is not opened, removing impurities from the next spinneret hole. Then the drive motor rotates the connecting shaft so that the vent hole is aligned with the next spinneret hole to be detected. This process is repeated until all spinneret holes at a spinneret position are detected.

[0023] In one alternative embodiment, the drive motor is mounted on the robotic arm, which is electrically connected to a control module. The control module is configured to control the robotic arm to move the drive motor so that the disc is aligned with each spinneret position.

[0024] Secondly, this disclosure also provides a method for operating the detection device for hollow fiber spinnerets described above, comprising:

[0025] When the detection unit is inspecting the spinneret holes at a certain spinneret position, air is introduced into each spinneret hole one by one. When air is introduced into one spinneret hole, the other spinneret holes are blocked. The control module controls the sensor assembly to detect the flow rate of the gas flowing out of each spinneret hole in order to determine whether each spinneret hole is qualified.

[0026] In one optional implementation, the control module controls the drive motor to rotate the connecting shaft, so that the vent is aligned with the first spinneret hole to be tested. At this time, the groove is blocked by the part without a spinneret hole, the opening at the top of the flow channel is aligned with the side wall of the sleeve, the opening at the top of the flow channel is closed, and the air source is introduced into the sleeve through the air inlet. After the gas enters the vent, it flows out from the aligned spinneret hole. The sensor assembly below the spinneret hole detects the flow rate of the gas flowing out of the spinneret hole. When the detected flow rate is the same as the preset flow rate, the control module determines that the currently tested spinneret hole is qualified.

[0027] The beneficial effect of this invention is that the detection device for hollow fiber spinnerets, when detecting a spinneret at a spinneret position, introduces air into each spinneret one by one. When air is introduced into one spinneret, the other spinnerets are blocked. The control module controls the sensor assembly to detect the flow rate of the gas flowing out of each spinneret to determine whether each spinneret is qualified. This achieves the acquisition of the gas flow rate of a single spinneret, which facilitates accurate determination of whether each spinneret is qualified.

[0028] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 A schematic diagram of a detection device for hollow fiber spinnerets provided in an embodiment of this disclosure;

[0032] Figure 2 This is a schematic diagram of the structure of a detection unit provided in an embodiment of the present disclosure;

[0033] Figure 3 This is a schematic diagram of the structure of a disk body provided in an embodiment of the present disclosure;

[0034] Figure 4 A cross-sectional view of a disk body provided in an embodiment of this disclosure;

[0035] Figure 5 This is a schematic diagram of the structure of a sleeve provided in an embodiment of the present disclosure.

[0036] In the picture:

[0037] Detection section 1, drive motor 11, connecting shaft 111, disc 12, vent hole 121, groove 122, flow channel 123, sleeve 13, air outlet 131, air inlet 132, connecting rod 133, through hole 134;

[0038] Robotic arm 2;

[0039] 3. Spinneret plate, 31. Spinneret position, 32. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0042] A hollow fiber spinneret is a precision spinning die specifically designed to extrude hollow tubular fibers. When polymer melt is extruded through its spinneret orifices, it forms hollow cross-section fiber filaments. Therefore, the spinnerets on a hollow fiber spinneret are not traditionally circular, but rather composed of multiple discontinuous arc-shaped slits. After a period of use, the spinneret needs to be cleaned and inspected to ensure the uniformity of its arc-shaped slits. In related technologies, airflow detection is used to determine whether the uniformity of the multiple arc-shaped slits in a group of spinnerets is consistent by acquiring airflow stability data for each group of spinnerets. However, this method still has some problems. Because the arc-shaped slits are small, it is impossible to acquire individual airflow data for each arc-shaped slit; only data for a group of spinnerets can be acquired. This means that if the flow rate of one arc-shaped slit in a group of spinnerets increases while the flow rate of another decreases, the final result will show that the two cancel each other out, resulting in stable flow data and leading to false detections.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0045] like Figure 1 As shown, at least one other disclosed embodiment provides a detection device for a hollow fiber spinneret, comprising: a detection unit 1 disposed above a spinneret 3, the spinneret 3 having a plurality of spinneret positions 31, each spinneret position 31 being composed of a plurality of spinneret holes 32, and a sensor assembly electrically connected to a control module disposed below the spinneret positions 31, the sensor assembly covering all spinneret holes 32 corresponding to the spinneret position 31 being detected; the detection unit 1 is configured to, when detecting a spinneret hole 32 of a spinneret position 31, sequentially ventilate each spinneret hole 32, while the remaining spinneret holes 32 are blocked when one spinneret hole 32 is ventilated; the control module controls the sensor assembly to detect the flow rate of the gas flowing out of each spinneret hole 32 to determine whether each spinneret hole 32 is qualified, thereby realizing the acquisition of the gas flow rate of a single spinneret hole 32, facilitating accurate determination of whether each spinneret hole 32 is qualified.

[0046] In this embodiment, the spinneret holes 32 in the spinneret position 31 are distributed in an annular shape at equal intervals.

[0047] In this embodiment, the sensor assembly may include a flow sensor electrically connected to the control module to detect the gas flow rate from the spinneret 32; the sensor assembly is located below the spinneret 3 and is not shown in the accompanying drawings.

[0048] In this embodiment, when detecting a spinneret 3, a corresponding sensor assembly can be provided below each spinneret position 31; alternatively, only one sensor assembly can be provided, and the spinneret 3 can be placed on a moving mechanism. The moving mechanism drives each spinneret position 31 to align with the sensor assembly one by one. For example, the moving mechanism supports the part of the spinneret 3 that does not have a spinneret position 31 on its edge, thereby driving the spinneret 3 to move, so that the spinneret position 31 can align with the sensor assembly fixed below one by one.

[0049] like Figure 2 , Figure 3 and Figure 4 As shown, in an optional embodiment, the detection unit 1 includes: a connecting shaft 111 and a disc 12 disposed at the bottom of the connecting shaft 111; the connecting shaft 111 is connected to a drive motor 11; the disc 12 has a vent hole 121 adapted to the spinneret hole 32, and the bottom surface of the disc 12 has a groove 122 adapted to the spinneret hole 32, the distance between the vent hole 121 and the groove 122 is the same as the distance between two adjacent spinneret holes 32 in the spinneret position 31; the drive motor 11 is electrically connected to a control module; the control module is configured to control the drive motor 11 to drive the connecting shaft 111 to rotate, so that the disc 12 rotates, and when the vent hole 121 is aligned with the spinneret hole 32, the groove 122 covers the next aligned spinneret hole 32 of the vent hole 121.

[0050] In this embodiment, the size of the disc body 12 is larger than the size of the spinneret position 31. The disc body 12 is circular, and its diameter can be larger than the diameter of the spinneret position 31, so that the part of the disc body 12 without the ventilation hole 121 and the groove 122 can block other spinnerets 32. When the ventilation hole 121 is aligned with a spinneret 32 ​​and the groove 122 covers a spinneret 32, the part of the disc body 12 without the ventilation hole 121 and the groove 122 can block other spinnerets 32.

[0051] In this embodiment, the drive motor 11 can be a servo motor, which facilitates precise control of the rotation angle of the disk body 12.

[0052] like Figure 4 As shown, in an optional embodiment, the disc body 12 has a herringbone-shaped flow channel 123 inside. One bottom opening of the flow channel 123 is connected to the vent 121, and the other bottom opening is connected to the groove 122. The top opening of the flow channel 123 is located on the side wall of the disc body 12.

[0053] like Figure 5As shown, in one optional embodiment, a sleeve 13 is fitted over the disc body 12, with the bottom surface of the sleeve 13 open, and the bottom surface of the disc body 12 and the bottom surface of the sleeve 13 are on the same plane; the outer wall of the disc body 12 contacts the inner wall of the sleeve 13, and the disc body 12 is adapted to rotate relative to the sleeve 13; a plurality of air outlets 131 are provided on the side wall of the sleeve 13, and the air outlets 131 are adapted to the opening at the top of the flow channel 123 and are located at the same height, so as to contact the bottom surface of the disc body 12. When the spinneret 3 is in operation, the bottom surface of the sleeve 13 should be kept clear to avoid obstruction. An air inlet 132 is provided on the side wall of the sleeve 13. The air inlet 132 is higher than the top surface of the disc 12 and is connected to an air source. A through hole 134 is provided on the top surface of the sleeve 13. The connecting shaft 111 extends out of the through hole 134 and a sealing ring is provided between the connecting shaft 111 and the through hole 134. Several connecting rods 133 are provided on the top surface of the sleeve 13 and are connected to the housing of the drive motor 11.

[0054] In this embodiment, the sleeve 13 is fixed by the connecting rod 133.

[0055] In this embodiment, a sealing ring is used to prevent gas from flowing out between the through hole 134 and the connecting shaft 111.

[0056] In one optional implementation, at the start of testing, the bottom surface of the disc 12 contacts the top surface of the spinneret 3. The control module is configured to control the drive motor 11 to rotate the connecting shaft 111, so that the vent 121 is aligned with the part of the spinneret 3 where the spinneret hole 32 is not opened. At this time, the groove 122 covers the first spinneret hole 32 to be tested, and the opening at the top of the flow channel 123 is aligned with the corresponding air outlet 131. The air source passes through the air inlet 132 into the sleeve 13, and the gas enters... The gas enters through the vent 121, but is blocked by the portion of the spinneret 3 where no spinneret holes 32 are formed. The gas flows into the flow channel 123 from the portion where the vent 121 connects to the flow channel 123, and then flows out from the opening at the top of the flow channel 123. At this time, the portion where the groove 122 connects to the flow channel 123 is under negative pressure, which causes gas to flow from the spinneret hole 32 corresponding to the groove 122 to the portion where the groove 122 connects to the flow channel 123. The flowing gas removes impurities from the spinneret hole 32 corresponding to the groove 122.

[0057] In this embodiment, the size of the spinneret 3 is known, the position of the spinneret 3 is also known during testing, the size of the spinneret position 31 is known, the size of the spinneret hole 32 is known, and the interval between adjacent spinneret holes 32 is also known. Therefore, the angle that the disc body 12 needs to rotate can be set in advance in the control module so that the vent hole 121 can be aligned with the spinneret hole 32 during testing.

[0058] In this embodiment, when gas enters the sleeve 13, if the vent 121 is blocked and the groove 122 is aligned with the spinneret 32, the gas enters the flow channel 123 after entering the vent 121. The gas flows quickly to the top opening of the flow channel 123 and then flows out from the aligned outlet 131. At this time, a negative pressure is generated in the part of the flow channel 123 connected to the groove 122. An airflow is generated in the spinneret 32 ​​aligned with the groove 122 and flows towards the flow channel 123. The airflow can carry impurities in the spinneret 32 ​​into the flow channel 123, preventing the downward gas from blowing impurities towards the sensor assembly when the spinneret 32 ​​is detected later, and preventing impurities from affecting the detection accuracy of the sensor assembly.

[0059] In one optional implementation, after impurities are removed from the first required spinneret hole 32, the control module is configured to control the drive motor 11 to rotate the connecting shaft 111 so that the vent hole 121 is aligned with the first required spinneret hole 32. At this time, the groove 122 is blocked by the part of the spinneret hole 32 that is not opened, the opening at the top of the flow channel 123 is aligned with the side wall of the sleeve 13, the opening at the top of the flow channel 123 is closed, the air source is vented into the sleeve 13 through the air inlet 132, the gas enters the vent hole 121 and flows out from the aligned spinneret hole 32, the sensor assembly below the spinneret hole 32 detects the flow rate of the gas flowing out of the spinneret hole 32, when the detected flow rate is the same as the preset flow rate, the control module determines that the currently detected spinneret hole 32 is qualified.

[0060] In this embodiment, when the vent 121 is aligned with the spinneret 32, the opening at the top of the flow channel 123 is blocked by the inner wall of the sleeve 13, and the groove 122 is blocked by the part without the spinneret 32. Gas cannot flow out from the flow channel 123 and the groove 122, and the gas flows out downward from the spinneret 32. The gas flow rate of a single spinneret 32 ​​is detected by the sensor assembly, thereby determining whether the spinneret 32 ​​is qualified.

[0061] In this embodiment, when the vent 121 is aligned with the spinneret 32, the opening at the top of the flow channel 123 is blocked. When the groove 122 is aligned with the spinneret 32, the opening at the top of the flow channel 123 will be aligned with the corresponding air outlet 131, which facilitates the outflow of gas in the flow channel 123 and the outflow of impurities through the air outlet 131.

[0062] In one alternative implementation, after one of the spinneret holes 32 has been detected, the control module is configured to control the drive motor 11 to rotate the connecting shaft 111 so that the groove 122 is aligned with the next spinneret hole 32 to be detected. The vent hole 121 is blocked by the part of the spinneret hole 32 that is not opened, removing impurities from the next spinneret hole 32. Then the drive motor 11 rotates the connecting shaft 111 so that the vent hole 121 is aligned with the next spinneret hole 32 to be detected. This process is repeated until all the spinneret holes 32 of a spinneret position 31 have been detected.

[0063] In one alternative embodiment, the drive motor 11 is mounted on the robotic arm 2, which is electrically connected to a control module. The control module is configured to control the robotic arm 2 to move the drive motor 11 so that the disc 12 is aligned with each spinneret position 31.

[0064] In this embodiment, if each spinneret position 31 is equipped with a corresponding sensor assembly, after the detection of one spinneret position 31 is completed, the robot arm 2 can drive the detection unit 1 to move and align with the next spinneret position 31; if there is only one or part of the sensor assembly, after the moving mechanism drives the next spinneret position 31 to align with the sensor assembly, the robot arm 2 can drive the detection unit 1 to align with the current spinneret position 31 that needs to be detected.

[0065] At least one other disclosed embodiment also provides a method of operation using the above-described detection device for hollow fiber spinnerets, comprising: when the detection unit 1 detects a spinneret 32 ​​at a spinneret position 31, air is introduced into each spinneret 32 ​​one by one; when air is introduced into one spinneret 32, the remaining spinneret 32 ​​are blocked; and the control module controls the sensor assembly to detect the flow rate of the gas flowing out of each spinneret 32 ​​in order to determine whether each spinneret 32 ​​is qualified.

[0066] In one optional implementation, the control module controls the drive motor 11 to rotate the connecting shaft 111, so that the vent 121 is aligned with the first spinneret hole 32 to be detected. At this time, the groove 122 is blocked by the part of the spinneret hole 32 that is not opened. The opening at the top of the flow channel 123 is aligned with the side wall of the sleeve 13. The opening at the top of the flow channel 123 is closed. The air source is vented into the sleeve 13 through the air inlet 132. After the gas enters the vent 121, it flows out from the aligned spinneret hole 32. The sensor assembly below the spinneret hole 32 detects the flow rate of the gas flowing out of the spinneret hole 32. When the detected flow rate is the same as the preset flow rate, the control module determines that the currently detected spinneret hole 32 is qualified.

[0067] In summary, the detection device for hollow fiber spinnerets uses the detection unit 1 to sequentially ventilate each spinneret 32 ​​when detecting a spinneret 32 ​​at a spinneret position 31. When one spinneret 32 ​​is ventilated, the other spinneret 32s are blocked. The control module controls the sensor assembly to detect the flow rate of the gas flowing out of each spinneret 32 ​​to determine whether each spinneret 32 ​​is qualified. This achieves the acquisition of the gas flow rate of a single spinneret 32, making it easier to accurately determine whether each spinneret 32 ​​is qualified.

[0068] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0069] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0070] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0071] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A detection device for hollow fiber spinnerets, characterized in that, include: The detection unit (1) is located above the spinneret (3). The spinneret (3) has several spinneret positions (31) and each spinneret position (31) is composed of several spinneret holes (32). A sensor assembly electrically connected to the control module is located below the spinneret position (31). The sensor assembly covers all the spinneret holes (32) corresponding to the spinneret position (31) being detected. The detection unit (1) is configured to vent air to each spinneret hole (32) one by one when detecting the spinneret hole (32) of a spinneret position (31). When one spinneret hole (32) is vented, the other spinneret holes (32) are blocked. The control module controls the sensor assembly to detect the flow rate of the gas flowing out of each spinneret hole (32) to determine whether each spinneret hole (32) is qualified. The detection unit (1) includes: a connecting shaft (111) and a disk (12) disposed at the bottom of the connecting shaft (111). The disc body (12) is provided with a vent (121) adapted to the spinneret (32), and the bottom surface of the disc body (12) is provided with a groove (122) adapted to the spinneret (32). The distance between the vent (121) and the groove (122) is the same as the distance between two adjacent spinnerets (32) in the spinneret position (31). The control module is configured to control the drive motor (11) to drive the connecting shaft (111) to rotate so that the disc (12) rotates. When the vent (121) is aligned with the spinneret (32), the groove (122) covers the next aligned spinneret (32) of the vent (121). The disc body (12) has a herringbone-shaped flow channel (123) inside. One bottom opening of the flow channel (123) is connected to the vent (121), and the other bottom opening is connected to the groove (122). The top opening of the flow channel (123) is located on the side wall of the disc body (12). The disc body (12) is covered with a sleeve (13), the bottom surface of the sleeve (13) is open, and the bottom surface of the disc body (12) and the bottom surface of the sleeve (13) are on the same plane; The outer wall of the disc (12) is in contact with the inner wall of the sleeve (13), and the disc (12) is adapted to rotate relative to the sleeve (13); The sleeve (13) has several air outlets (131) on its side wall. The air outlets (131) are adapted to the opening at the top of the flow channel (123) and are located at the same height.

2. The detection device for hollow fiber spinnerets as described in claim 1, characterized in that: The connecting shaft (111) is connected to the drive motor (11); The drive motor (11) is electrically connected to the control module.

3. The detection device for hollow fiber spinnerets as described in claim 2, characterized in that: The sleeve (13) has an air inlet (132) on its side wall. The air inlet (132) is higher than the top surface of the disc (12). The air inlet (132) is connected to an air source. The top surface of the sleeve (13) is provided with a through hole (134), the connecting shaft (111) extends out from the through hole (134), and a sealing ring is provided between the connecting shaft (111) and the through hole (134); The top surface of the sleeve (13) is provided with a plurality of connecting rods (133), which are connected to the housing of the drive motor (11).

4. The detection device for hollow fiber spinnerets as described in claim 3, characterized in that: At the start of the test, the bottom surface of the disc (12) contacts the top surface of the spinneret (3). The control module is configured to control the drive motor (11) to drive the connecting shaft (111) to rotate, so that the vent (121) is aligned with the part of the spinneret (3) where the spinneret hole (32) is not opened. At this time, the groove (122) covers the first spinneret hole (32) to be tested, and the opening at the top of the flow channel (123) is aligned with the corresponding air outlet (131). The air source passes through the air inlet (132) into the sleeve (13), and the gas enters the vent (121). The gas is blocked by the part of the spinneret (3) where there is no spinneret hole (32). The gas flows into the flow channel (123) from the part where the vent hole (121) and the flow channel (123) are connected, and then flows out from the opening at the top of the flow channel (123). At this time, the part where the groove (122) and the flow channel (123) are connected is under negative pressure, which causes the gas in the spinneret hole (32) corresponding to the groove (122) to flow into the part where the groove (122) and the flow channel (123) are connected. The impurities in the spinneret hole (32) corresponding to the groove (122) are removed by the flowing gas.

5. The detection device for hollow fiber spinnerets as described in claim 4, characterized in that: After impurities are removed from the first required spinneret hole (32), the control module is configured to control the drive motor (11) to drive the connecting shaft (111) to rotate, so that the vent hole (121) is aligned with the first required spinneret hole (32). At this time, the groove (122) is partially blocked by the part of the spinneret hole (32) that is not opened. The opening at the top of the flow channel (123) is aligned with the side wall of the sleeve (13). The opening at the top of the flow channel (123) is closed. The air source is vented into the sleeve (13) through the air inlet (132). After the gas enters the vent hole (121), it flows out from the aligned spinneret hole (32). The sensor assembly below the spinneret hole (32) detects the flow rate of the gas flowing out of the spinneret hole (32). When the detected flow rate is the same as the preset flow rate, the control module determines that the currently detected spinneret hole (32) is qualified.

6. The detection device for hollow fiber spinnerets as described in claim 5, characterized in that: After one of the spinnerets (32) is inspected, the control module is configured to control the drive motor (11) to drive the connecting shaft (111) to rotate, so that the groove (122) is aligned with the next spinneret (32) to be inspected. The vent (121) is partially blocked by the unopened spinneret (32) to remove impurities from the next spinneret (32). Then the drive motor (11) drives the connecting shaft (111) to rotate, so that the vent (121) is aligned with the next spinneret (32) to be inspected. This process is repeated until all the spinnerets (32) at a spinneret position (31) are inspected.

7. The detection device for hollow fiber spinnerets as described in claim 2, characterized in that: The drive motor (11) is mounted on the manipulator (2), which is electrically connected to the control module. The control module is configured to control the manipulator (2) to move the drive motor (11) so that the disc (12) is aligned with each spinneret position (31).

8. A method for operating the detection device for hollow fiber spinnerets as described in claim 1, characterized in that, include: When the detection unit (1) detects the spinneret hole (32) at a spinneret position (31), it vents air into each spinneret hole (32) one by one. When air is vented into one spinneret hole (32), the other spinneret holes (32) are blocked. The control module controls the sensor assembly to detect the flow rate of the gas flowing out of each spinneret hole (32) in order to determine whether each spinneret hole (32) is qualified.

9. The working method as described in claim 8, characterized in that: The control module controls the drive motor (11) to drive the connecting shaft (111) to rotate, so that the vent (121) is aligned with the first spinneret hole (32) to be tested. At this time, the groove (122) is partially blocked by the part of the spinneret hole (32) that is not opened. The opening at the top of the flow channel (123) is aligned with the side wall of the sleeve (13). The opening at the top of the flow channel (123) is closed. The air source is vented into the sleeve (13) through the air inlet (132). After the gas enters the vent (121), it flows out from the aligned spinneret hole (32). The sensor assembly below the spinneret hole (32) detects the flow rate of the gas flowing out of the spinneret hole (32). When the detected flow rate is the same as the preset flow rate, the control module determines that the currently tested spinneret hole (32) is qualified.

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