Online measuring device for cylindrical needling machine

Abstract

The invention relates to the technical field of needling machines, in particular to an online measuring device for a cylindrical needling machine, which comprises a driving part, a detection plate, a measuring instrument and a pressure detection part, the detection plate is mounted at the driving end of the driving part so as to abut against the surface of the to-be-detected insulation barrel under the control of the driving part; the measuring instrument is mounted at the fixed end of the driving part; the pressure detection part is installed on the driving part so as to detect the actual pressure value applied by the driving part to the detection plate, and when the actual pressure value reaches a preset pressure value, the measuring instrument is controlled to be started. The online measuring device for the cylinder needling machine can effectively solve the problems that an existing needling machine is not provided with an online measuring device, and the wall thickness of a heat preservation barrel can only be detected and measured manually, can effectively detect and measure the wall thickness of the heat preservation barrel, and is high in accuracy and efficiency of detection and measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of needling machines, and more particularly to an online measuring device for a cylindrical needling machine. Background Art

[0002] During the production process of thermos drums, the wall thickness needs to be tested to control product quality. During production, mesh and carbon cloth are wrapped around a cylindrical core mold and then needle-punched. After every three layers of wrapping and needle-punching (the number of layers can be set according to actual conditions), an inspection is performed to measure the wall thickness and control product quality.

[0003] The existing needling machine has no online measuring device, and can only use manual inspection to measure the wall thickness of the insulation barrel, which can only be compared with the inspection fixture. The inspection and measurement accuracy is low and the efficiency is low. Summary of the Invention

[0004] The object of the present invention is to provide an online measuring device for a cylindrical needling machine to solve the above technical problems.

[0005] In order to achieve the above-mentioned objectives, the present invention proposes an online measuring device for a cylindrical needling machine, comprising: a driving unit, a detection plate, a measuring instrument and a pressure detection unit; the detection plate is installed at the driving end of the driving unit to press against the surface of the insulation barrel to be detected under the control of the driving unit; the measuring instrument is installed at the fixed end of the driving unit; the pressure detection unit is installed on the driving unit to detect the actual pressure value applied by the driving unit to the detection plate, and controls the measuring instrument to start when the actual pressure value reaches a preset pressure value.

[0006] Optionally, the driving part includes a machine base, on which a driving cylinder is provided, the output end of the driving cylinder is connected to a pressure plate, the pressure plate is connected to one side of the pressure detection part, the other side of the pressure detection part is connected to a pressure seat, the pressure seat is connected to a connecting plate, the connecting plate is provided with a detection plate and a reflective plate, and the reflective plate is arranged opposite to the measuring instrument.

[0007] Optionally, a stabilizing rod is connected to the coupling plate, and a middle portion of the stabilizing rod is slidably connected to a sliding hole of the machine base.

[0008] Optionally, two stabilizing rods are provided, and the two stabilizing rods are located on both sides of the driving cylinder.

[0009] Optionally, two guide shafts are provided on the pressing plate, and the middle parts of the two guide shafts are slidably connected in the guide holes of the machine base.

[0010] Optionally, the pressure-bearing seat includes a bearing frame connected to the pressure detection part, the bearing frame is rotatably connected to the support block through a hinge shaft, and the support block is connected to the center of the joint plate.

[0011] Optionally, the pressure detection unit includes a pressure sensor connected between the support frame and the pressure plate.

[0012] Optionally, the stabilizing rod includes a rod body slidably arranged in a sliding hole of the machine base, one end of the rod body is connected to a limit plate, a strip slide is provided on the limit plate, a limit sliding shaft is passed through the strip slide, one end of the limit sliding shaft is fixedly connected to the coupling plate, and the other end of the limit sliding shaft is fixedly connected to a limit head, which is blocked on the side surface of the limit plate away from the coupling plate; a spring is connected between the limit plate and the coupling plate, and the rod body is passed through the inner side of the spring.

[0013] Optionally, there are two strip slides, each of which is provided with a limiting sliding shaft, the two limiting sliding shafts are relatively arranged on both sides of the rod body, and one limiting sliding shaft is located between the rod body and the driving cylinder.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] The online measuring device for a cylindrical needling machine of the present invention can effectively solve the problem that existing needling machines have no online measuring device and can only use manual inspection and measurement of the wall thickness of the insulation barrel. It can effectively inspect and measure the wall thickness of the insulation barrel, and the inspection and measurement are highly accurate and efficient. The pressure detection part is set to detect the pressure, which can avoid the detection plate from excessively squeezing the insulation barrel product to be measured, resulting in distortion of the detection value, and can ensure the tightness of the fit between the detection plate and the insulation barrel to be detected, thereby improving the accuracy of the detection result.

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of the first perspective structure of an online measurement device provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of the online measurement device provided by an embodiment of the present invention from a second perspective;

[0020] Figure 3 A schematic diagram of the first perspective structure of the driving unit and the pressure detection unit provided by an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the structure of the driving unit and the pressure detection unit provided by an embodiment of the present invention from a second perspective;

[0022] Figure 5 A schematic diagram of a local structure provided for an embodiment of the present invention Figure 1 ;

[0023] Figure 6 A schematic diagram of a local structure provided for an embodiment of the present invention Figure 2 ;

[0024] Figure 7 A schematic structural diagram of a limit plate provided in an embodiment of the present invention;

[0025] Figure 8 A schematic structural diagram of an online measurement device from a third perspective according to an embodiment of the present invention;

[0026] Figure 9 A schematic diagram of a local structure provided for an embodiment of the present invention Figure 3 ;

[0027] Figure 10 A schematic structural diagram of a reflective plate provided in an embodiment of the present invention;

[0028] Figure 11 A schematic structural diagram of a seat plate provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0031] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0032] The following is combined with Figure 1-11 The present invention is described in further detail.

[0033] Example 1

[0034] like Figures 1-11As shown, an online measuring device for a cylindrical needling machine includes: a driving part 1, a detection plate 2, a measuring instrument 3 and a pressure detection part 4; the detection plate 2 is installed at the driving end of the driving part 1 to press against the surface of the heat-insulating barrel to be detected under the control of the driving part 1; the measuring instrument 3 is installed at the fixed end of the driving part 1; the pressure detection part 4 is installed on the driving part 1 to detect the actual pressure value applied by the driving part 1 to the detection plate 2, and control the measuring instrument 3 to start when the actual pressure value reaches a preset pressure value.

[0035] The present invention provides an online measuring device for a cylindrical needling machine, which is used to detect the wall thickness of an insulation barrel. It can effectively solve the problem that the existing needling machine has no online measuring device and can only use manual inspection to measure the wall thickness of the insulation barrel. It can effectively inspect and measure the wall thickness of the insulation barrel, and the inspection and measurement are accurate and efficient. During the production process of the insulation barrel, it is necessary to detect the wall thickness of the insulation barrel to control the product quality. When the insulation barrel is produced, a mesh tire and a carbon cloth are wound on a cylindrical core mold and acupuncture is performed. After each winding and acupuncture of 3 layers (the number of layers can be set according to actual conditions), an inspection is performed once. During the inspection, when the cylindrical core mold is not acupunctured, the driving part 1 controls the detection plate 2 to press against the surface of the cylindrical core mold, and detects the actual pressure value applied by the driving part 1 to the detection plate 2 through the pressure detection part 4. When the actual pressure value reaches the preset pressure value, the driving part 1 stops driving the detection plate 2 to continue moving, and starts the measuring instrument 3. The measuring instrument 3 detects the distance between it and the reflective plate 6 at the driving end of the driving part 1 and collects data. The background performs digital According to analysis, the initial distance is D1, and the mesh and carbon cloth are wound on the cylindrical core mold and acupuncture is performed. Every time a preset number of layers are wound and acupunctured, the driving unit 1 controls the detection plate 2 to press against the cylindrical core mold after acupuncture. At this time, the distance between it and the reflective plate 6 at the driving end of the driving unit 1 is detected by the measuring instrument 3 and data is collected. The distance is D2, D2-D1=the actual wall thickness of the insulation barrel, and the inspection and measurement are accurate and efficient. The actual wall thickness of the insulation barrel can be compared with the theoretical value to judge the quality of the insulation barrel produced. In the present invention, the actual pressure value applied by the driving unit 1 to the detection plate 2 is detected by the pressure detection unit 4. When the actual pressure value reaches the preset pressure value, the measuring instrument 3 is started and the detection is performed by the measuring instrument 3. Because the product itself has some elasticity, setting the pressure detection unit 4 to detect the pressure can avoid the detection plate 2 from excessively squeezing the insulation barrel product to be measured, resulting in distortion of the detection value, and can ensure the tightness of the fit between the detection plate and the insulation barrel to be detected, thereby improving the accuracy of the detection result.

[0036] The driving part 1 includes a machine base 101, on which a driving cylinder 102 is provided. The output end of the driving cylinder 102 is connected to a pressure plate 103, which is connected to one side of the pressure detecting part 4. The other side of the pressure detecting part 4 is connected to a pressure-bearing seat, which is connected to a connecting plate 104. The connecting plate 104 is provided with a detection plate 2 and a reflective plate 6, and the reflective plate 6 is arranged opposite to the measuring instrument 3.

[0037] The machine base 101 is used to be connected to the frame of the cylindrical needling machine. The output end of the driving cylinder 102 is connected to the pressing plate 103 to control the movement of the pressing plate 103. The pressing plate 103 drives the connecting plate 104 to move through the pressure detecting part 4 and the pressure-bearing seat. The connecting plate 104 is equipped with a detecting plate 2, which can drive the detecting plate 2 to fit or separate from the heat-insulating barrel to be detected. The pressure detecting part 4 is set between the pressing plate 103 and the pressure-bearing seat to detect the actual pressure value when the driving cylinder 102 controls the detecting plate 2 to fit with the heat-insulating barrel to be detected.

[0038] The pressure detection unit 4 includes a pressure sensor connected between the support frame 106 and the pressure plate 103 .

[0039] The connecting plate 104 is connected to a stabilizing rod, the middle of which is slidably connected to the sliding hole of the base 101; two stabilizing rods are provided, and the two stabilizing rods are located on both sides of the driving cylinder 102. The provision of the stabilizing rod is conducive to improving the stability of the driving cylinder 102 in controlling the movement of the connecting plate 104.

[0040] Two guide shafts 105 are provided on the pressing plate 103, and the middle parts of the two guide shafts 105 are slidably connected in the guide holes. The two guide shafts 105 are provided to improve the stability of the pressing plate 103 when the driving cylinder 102 drives the pressing plate 103 to move.

[0041] The pressure-bearing seat includes a supporting frame 106 connected to the pressure detection part 4, and the supporting frame 106 is rotatably connected to the support block 107 through a hinge shaft, and the support block 107 is connected to the center of the connecting plate 104; the stabilizing bar includes a rod body 108 slidably arranged in the sliding hole of the machine base 101, one end of the rod body 108 is connected to the limit plate 109, and the limit plate 109 is provided with a strip slide 110, and a limit sliding shaft 111 is passed through the strip slide 110, one end of the limit sliding shaft 111 is fixedly connected to the connecting plate 104, and the other end of the limit sliding shaft 111 is fixedly connected to the limit head 112, and the limit head 112 is blocked on the side surface of the limit plate 109 away from the connecting plate 104; a spring 113 is connected between the limit plate 109 and the connecting plate 104, and the rod body 108 is passed through the inner side of the spring 113. Since the carrier 106 is rotatably connected to the support block 107 by the hinge shaft, the carrier 106 and the support block 107 can rotate relative to each other, and the support block 107 drives the connecting plate 104 and the detection plate 2 to rotate, and an angle can be formed between the detection plate 2 and the machine base 101, so that the detection plate 2 can be more closely contacted with the cylinder to be measured, and the verticality of the laser ranging sensor and the insulation barrel to be detected can be more accurate, so as to improve the accuracy of the actual measurement results; when the connecting plate 104 and the detection plate 2 rotate, the connecting plate 104 drives the limiting slide 111 to deviate, and the limiting slide 111 slides in the strip slide 110, changing the relative position of the limiting slide 111 and the strip slide 110. At this time, the limiting slide 111 is in an inclined state in the strip slide 110, so that the connecting plate 104 can be rotated Movement, the limit head 112 fixed on the limit slide 111 is used to limit the limit slide 111 to prevent the limit slide 111 from detaching from the strip slide 110; when relative rotation occurs between the coupling plate 104 and the machine base 101, the compression or tension state of the spring 113 between the limit plate 109 and the coupling plate 104 changes, so as to meet actual needs; the rod body 108 is passed through the inner side of the spring 113, which can improve the effect of the spring 113 when compressed or stretched, and prevent the spring 113 from directly bending when the limit plate 109 and the coupling plate 104 move relative to each other; the arrangement of the above structure enables the detection plate 2 to fit accurately and tightly on the cylinder to be measured. After the detection plate 2 detaches from the cylinder to be measured, the detection plate 2 can be reset under the elastic force of the spring 113 and return to a state parallel to the machine base 101.

[0042] There are two strip slides 110, and a limiting sliding shaft 111 is passed through the two strip slides 110. The two limiting sliding shafts 111 are relatively arranged on both sides of the rod body 108, and one limiting sliding shaft 111 is located between the rod body 108 and the driving cylinder 102. The setting of the two limiting sliding shafts 111 is conducive to improving the guiding and limiting effect; when the detection plate 2 and the machine base 101 are in a parallel state, the two limiting sliding shafts 111 are located at the center position of the two strip slides 110, so that they can tilt and move to either side.

[0043] Example 2

[0044] like Figures 1-11 As shown, the measuring instrument 3 includes a laser displacement ranging sensor 5, which is connected to a base plate 7, which is threadedly connected to a positioning screw 8. The base plate 7 slides on the bottom surface of the machine base 101, and the two ends of the positioning screw 8 are rotatably connected to the machine base 101. The positioning screw 8 is connected to a motor fixed to the side of the machine base 101.

[0045] During measurement, since there may be errors in the actual wall thickness of the insulation barrel at different positions, in order to improve the accuracy of measurement, in the present invention, a laser displacement ranging sensor 5 that can be adjusted in position is provided. During adjustment, the motor on the side of the machine base 101 is started, and the motor controls the adjustment screw 8 to rotate. When the adjustment screw 8 rotates, its contact position with the seat plate 7 is changed, thereby driving the seat plate 7 to slide on the bottom surface of the machine base 101, and finally realizing the adjustment of the actual position of the laser displacement ranging sensor 5. A plurality of reflectors 6 can be provided on the joint plate 104 so that the laser displacement ranging sensor 5 can be aligned with the reflectors 6 at different positions, thereby measuring the distances at different positions, and finally calculating the wall thickness of the insulation barrel at different positions, thereby improving the accuracy of the wall thickness detection of the insulation barrel and inspecting the quality of the insulation barrel.

[0046] Movable rods 701 are slid in the side hole seats on both sides of the seat plate 7, and side blocks 702 are fixed at one end of the two movable rods 701 to limit the two sides of the reflector 6 through the two side blocks 702; follower plates 703 are fixed on the two side blocks 702 to limit the side of the reflector 6 away from the laser displacement ranging sensor 5 through the two follower plates 703; reset springs 704 are fixed between the blocks at the other ends of the two movable rods 701 and the two side hole seats, and the reset springs 704 are sleeved on the movable rods 701; elastic rubber pads 705 are fixed on the inner sides of the side blocks 702, and the elastic rubber pads 705 are located between the side blocks 702 and the reflector 6, and the reflector 6 slides on the horizontal axis at the bottom of the connecting plate 104.

[0047] When only one reflector 6 is provided inside the present invention, the reflector 6 can be slidably connected to the horizontal axis at the bottom of the connecting plate 104, and the reflector 6 and the connecting plate 104 are slidably matched. At this time, when the seat plate 7 drives the laser displacement ranging sensor 5 to move, the seat plate 7 can drive the movable rods 701 at both ends thereof to move. The two movable rods 701 can drive the reflector 6 to slide on the horizontal axis at the bottom of the connecting plate 104 through the two side blocks 702, thereby adjusting the position of the reflector 6, and the follower plates 703 are fixed on the two side blocks 702, which drive the reflector 6 away from the machine at the driving end of the driving unit 1. When the reflector 6 moves toward the base 101, the two follower plates 703 remain in contact with the reflector 6 under the elastic force of the two return springs 704 and will not become loose.

[0048] The reflective plate 6 is slidably matched with the connecting plate 104. A vertical beam 601 is fixed on the side of the reflective plate 6 away from the laser displacement ranging sensor 5. The vertical beam 601 is slidably connected to the horizontal axis through a horizontal hole. One end of the horizontal beam 602 is fixed to the bottom of the vertical beam 601. The other end of the horizontal beam 602 is slidably connected to one end of the telescopic beam 603. The movable block fixed on the telescopic beam 603 slides in the limiting slideway on the lower surface of the horizontal beam 602. The movable block is threadedly connected to the middle of the movable screw 604, and the movable screw 604 is rotatably connected to the beam 602. The telescopic beam 603 is provided with a telescopic screw at one end away from the laser displacement ranging sensor 5. The telescopic groove is equipped with a top pressure beam 605, and one end of the top pressure beam 605 is connected to the inner side of the telescopic groove of the telescopic beam 603 through a tensioning spring, and the other end of the top pressure beam 605 is rotatably connected to the top pressure roller 606; the linkage block 607 fixed on the side of the top pressure beam 605 slides in the side sliding groove on the side of the telescopic beam 603, and the end plate is fixed on the side of the telescopic beam 603, and the end plate slides on the end plate to match the sliding shaft, and the end of the sliding shaft close to the linkage block 607 is fixed with a disc seat, and a push-type alarm 608 is installed on the disc seat, and a buffer compression spring 609 is fixed between the disc seat and the end plate, and the buffer compression spring 609 is sleeved on the sliding shaft.

[0049] When the detection plate 2 is fitted with the heat-insulating barrel to be detected, the movable screw 604 can be rotated to change its contact position with the movable block. The threaded connection screw on the movable block can be tightened on the movable screw 604 by the screw, so that the contact position of the movable screw 604 and the movable block is relatively fixed, thereby controlling the movable block to drive the telescopic beam 603 to slide in the crossbeam 602, thereby controlling the top pressure roller 606 on the top pressure beam 605 to fit with the heat-insulating barrel to be detected through the telescopic beam 603. At this time, as the position of the laser displacement ranging sensor 5 is adjusted, the position of the reflector 6 is driven to be adjusted, and the reflector 6 drives the top pressure roller 606 to contact different positions of the heat-insulating barrel to be detected. If the thickness of some positions of the heat-insulating barrel is too thick, the top pressure roller 60 6 generates thrust, and the top pressure roller 606 drives the top pressure beam 605 to slide in the telescopic beam 603, and drives the linkage block 607 to move toward the push-type alarm 608. When the linkage block 607 contacts the push-type alarm 608, the push-type alarm 608 issues an alarm prompt, reminding the production staff that the local thickness of the insulation barrel is too large and the product quality is poor; after the linkage block 607 contacts the push-type alarm 608, it can drive the push-type alarm 608 and the disc seat to move toward the end plate, and compress the buffer spring 609. The buffer spring 609 plays a buffering role to ensure that the movement of the top pressure roller 606 will not cause damage to the insulation barrel, and the top pressure roller 606 rolls on the insulation barrel to reduce its wear on the insulation barrel.

[0050] The sliding shaft is threadedly connected to a limit nut, which is stuck on the side of the end plate away from the buffer compression spring 609. The initial distance between the linkage block 607 and the push-type alarm 608 can be changed by changing the contact position of the limit nut and the sliding shaft, so as to set the range of alarm required when the preset thickness value is exceeded according to actual needs.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An online measuring device for a cylindrical needling machine, characterized in that: include: A driving unit (1), a detection plate (2), a measuring instrument (3) and a pressure detection unit (4); the detection plate (2) is mounted on the driving end of the driving unit (1) so as to press against the surface of the heat preservation barrel to be detected under the control of the driving unit (1); the measuring instrument (3) is mounted on the fixed end of the driving unit (1); the pressure detection unit (4) is mounted on the driving unit (1) so as to detect the actual pressure value applied by the driving unit (1) to the detection plate (2), and control the measuring instrument (3) to start when the actual pressure value reaches a preset pressure value.

2. An online measuring device for a cylindrical needling machine according to claim 1, characterized in that: The driving part (1) comprises a machine base (101), a driving cylinder (102) is provided on the machine base (101), an output end of the driving cylinder (102) is connected to a pressure plate (103), the pressure plate (103) is connected to one side of the pressure detection part (4), the other side of the pressure detection part (4) is connected to a pressure bearing seat, the pressure bearing seat is connected to a connecting plate (104), a detection plate (2) and a reflective plate (6) are provided on the connecting plate (104), and the reflective plate (6) is arranged opposite to the measuring instrument (3).

3. An online measuring device for a cylindrical needling machine according to claim 2, characterized in that: The connecting plate (104) is connected to a stabilizing rod, and the middle portion of the stabilizing rod is slidably connected in a sliding hole of the machine base (101).

4. An online measuring device for a cylindrical needling machine according to claim 3, characterized in that: There are two stabilizing rods, which are located on both sides of the driving cylinder (102).

5. An online measuring device for a cylindrical needling machine according to claim 4, characterized in that: Two shafts (105) are provided on the pressing plate (103), and the middle parts of the two shafts (105) are slidably connected in the guide holes of the machine base (101).

6. An online measuring device for a cylindrical needling machine according to claim 4, characterized in that: The pressure bearing seat comprises: a bearing frame (106) connected to the pressure detection part (4); the bearing frame (106) is rotatably connected to a support block (107) via a hinge shaft; the support block (107) is connected to the center of the joint plate (104); the pressure detection part (4) comprises: a pressure sensor, and the pressure sensor is connected between the bearing frame (106) and the pressure plate (103).

7. An online measuring device for a cylindrical needling machine according to claim 6, characterized in that: The stabilizing rod comprises: a rod body (108) slidably arranged in a sliding hole of a machine base (101); one end of the rod body (108) is connected to a limiting plate (109); a strip slideway (110) is provided on the limiting plate (109); a limiting sliding shaft (111) is passed through the strip slideway (110); one end of the limiting sliding shaft (111) is fixedly connected to the connecting plate (104); the other end of the limiting sliding shaft (111) is fixedly connected to a limiting head (112); the limiting head (112) is blocked on a side surface of the limiting plate (109) away from the connecting plate (104); and a spring (113) is connected between the limiting plate (109) and the connecting plate (104).

8. An online measuring device for a cylindrical needling machine according to claim 7, characterized in that: The rod body (108) is inserted into the inner side of the spring (113).

9. An online measuring device for a cylindrical needling machine according to claim 7, characterized in that: There are two strip slideways (110), each of which is provided with a limiting sliding shaft (111). The two limiting sliding shafts (111) are relatively arranged on both sides of the rod body (108), and one limiting sliding shaft (111) is located between the rod body (108) and the driving cylinder (102).

10. The online measuring device for a cylindrical needling machine according to claim 6, characterized in that: The measuring instrument (3) comprises a laser displacement distance measuring sensor (5), the laser displacement distance measuring sensor (5) is connected to a base plate (7), the base plate (7) is threadedly connected to a positioning screw (8), and both ends of the positioning screw (8) are rotatably connected to a machine base (101).

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