A cutting device

Abstract

The application relates to the technical field of battery production and discloses a cutting device for cutting pole pieces, which comprises a cutting mechanism, a dust suction pipe and a plugging piece, the dust suction pipe is connected with the cutting mechanism, the dust suction pipe is provided with a test hole, the test hole is communicated with a pipe cavity of the dust suction pipe, the test hole is used for inserting a measuring end of a wind speed measuring piece into the pipe cavity of the dust suction pipe, the plugging piece is detachably connected with the dust suction pipe, and the plugging piece seals the test hole. When it is necessary to measure the wind speed in the dust suction pipe, only the plugging piece needs to be dismounted, then the measuring end of the wind speed measuring piece is inserted into the pipe cavity of the dust suction pipe through the test hole, and the measurement of the wind speed in the dust suction pipe can be completed; after the measurement is completed, the plugging piece is mounted on the dust suction pipe and seals the test hole, so that the normal dust suction work of the dust suction pipe can be ensured, thereby, when the wind speed of the dust suction pipe is measured, the dust suction pipe does not need to be dismounted, the operation is simple, the measurement is easy, the time consumption is short, and the production time can be saved.

Description

Technical Field

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

[0002] In the lithium battery production process, the winding process is a key step in battery formation. This process requires a cutting device to cut the electrode sheets to a certain length so that they can be wound to form a battery cell. However, the electrode sheets are made of metal foil with both sides coated with a paste. Therefore, when the electrode sheets are cut, some paste falls off the cut edges, existing as dust particles. In related technologies, the cutting device is equipped with a suction pipe to remove these dust particles, preventing them from entering the wound battery cell and puncturing the separator, thus ensuring the quality of the battery cell production. However, the suction pipe needs to reach a fixed wind speed to collect the fallen dust. Therefore, the wind speed of the suction pipe needs to be measured before production. The current method for measuring the wind speed is to remove the suction pipe and measure the wind speed. The drawback of this method is that the removal and reinstallation of the suction pipe is complex and time-consuming, affecting production time. Summary of the Invention

[0003] The primary objective of this invention is to provide a cutting device whose suction pipe has an easily measurable wind speed, thereby saving production time.

[0004] To achieve the above objectives, the present invention provides a cutting device for cutting electrode sheets, comprising a cutting mechanism, a suction pipe, and a sealing component.

[0005] The suction tube is connected to the cutting mechanism. The suction tube is provided with a test hole, which communicates with the cavity of the suction tube. The test hole is used for inserting the test end of the wind speed measuring device into the cavity of the suction tube.

[0006] The sealing element is detachably connected to the suction pipe and seals the test hole.

[0007] In a specific embodiment of the present invention, the vacuum tube includes a tube body and a first mounting boss. The first mounting boss is disposed on the outer peripheral wall of the tube body. The side of the first mounting boss facing away from the tube body is provided with the test hole. The test hole communicates with the cavity of the tube body. The sealing member is connected to the first mounting boss.

[0008] In a specific embodiment of the present invention, the first mounting boss is provided with threads, and the threads are located on the wall of the test hole.

[0009] The sealing element is a screw, and the screw is connected to the thread.

[0010] In one specific embodiment of the present invention, the screw is made of plastic or rubber.

[0011] In a specific embodiment of the present invention, the pipe body includes a first pipe segment, a second pipe segment, and a third pipe segment. The first pipe segment is connected to the cutting mechanism, the third pipe segment is used to connect to the negative pressure assembly, and the two ends of the second pipe segment along its length are detachably and sealingly connected to the first pipe segment and the third pipe segment, respectively, to connect the first pipe segment and the third pipe segment.

[0012] The second pipe section has the first mounting boss on its outer peripheral wall.

[0013] In a specific embodiment of the present invention, it further includes a fixed rod and a floating component, the floating component being able to float in the wind;

[0014] The fixed rod is installed inside the second pipe section, and the floating component is connected to the fixed rod;

[0015] The second and / or third pipe sections are made of transparent material.

[0016] In a specific embodiment of the present invention, the vacuum tube further includes a second mounting boss, which is disposed on the outer peripheral wall of the second tube segment. The side of the second mounting boss facing away from the second tube segment is provided with a first mounting hole, which communicates with the cavity of the second tube segment.

[0017] The cutting device further includes an air blowing assembly, which is sealed and connected within the first mounting hole. The air blowing assembly is used to blow air into the cavity of the second pipe section.

[0018] In a particular embodiment of the present invention, the air blowing assembly includes an air blowing tube extending into the cavity of the second pipe segment, the air blowing tube having a support surface located within the cavity of the second pipe segment and at least partially facing the test hole, the support surface being used to contact the wind speed measuring element.

[0019] In a specific embodiment of the present invention, the test hole and the first mounting hole are arranged opposite to each other.

[0020] The air blowing assembly also includes a mounting plug and an elastic element.

[0021] The mounting plug is sealed to the first mounting hole. The mounting plug has a mounting cavity and a second mounting hole. The second mounting hole extends through the mounting plug along the axial direction of the first mounting hole. The mounting cavity communicates with the second mounting hole.

[0022] The air blowing tube has a limiting protrusion located on the outer peripheral wall of the air blowing tube. The air blowing tube passes through the second mounting hole, and the limiting protrusion is located within the mounting cavity.

[0023] The elastic element is disposed in the mounting cavity and is located on the side of the limiting protrusion away from the test hole. In the axial direction of the second mounting hole, both ends of the elastic element are in contact with the cavity wall of the mounting cavity and the limiting protrusion, respectively.

[0024] In one particular embodiment of the present invention, a windproof cover is further included, the windproof cover having a third mounting hole, the windproof cover being used to cover the test hole, the third mounting hole being used for the wind speed measuring element to pass through.

[0025] In one particular embodiment of the invention, a main suction pipe is further included, which is used to connect to a negative pressure assembly.

[0026] The vacuum tubes are provided in multiple ways, with one end of the vacuum tube connected to the cutting mechanism and the other end connected to the main vacuum tube.

[0027] In one particular embodiment of the present invention, a carrier is further included, which is disposed on the main suction pipe and is used to support the windproof cover.

[0028] The cutting device of this invention has the following advantages compared with the prior art:

[0029] The cutting device of the present invention has a test hole sealed by a sealing component on the suction pipe. When it is necessary to measure the wind speed inside the suction pipe, it is only necessary to remove the sealing component and then insert the measuring end of the wind speed measuring component into the cavity of the suction pipe through the test hole to complete the measurement of the wind speed inside the suction pipe. After the measurement is completed, the sealing component is installed on the suction pipe to seal the test hole, which ensures the normal operation of the suction pipe. Therefore, when measuring the wind speed of the suction pipe, there is no need to disassemble the suction pipe, which is simple to operate, easy to measure, and time-saving, thus saving production time. Attached Figure Description

[0030] Figure 1 This is a structural diagram of the electrode cutting device according to an embodiment of the present invention;

[0031] Figure 2 This is a structural diagram of the suction pipe, sealing component, and air blowing assembly in an embodiment of the present invention.

[0032] Figure 3 This is an embodiment of the present invention. Figure 2 Enlarged diagram of A in the middle;

[0033] Figure 4 This is a structural diagram of the wind speed measuring device in an embodiment of the present invention when measuring the wind speed of the dust suction pipe;

[0034] Figure 5 This is an embodiment of the present invention. Figure 4 Enlarged diagram of B in the diagram.

[0035] In the diagram, 1. Cutting mechanism; 2. Suction pipe; 201. Test hole; 21. Pipe body; 211. First pipe section; 212. Second pipe section; 213. Third pipe section; 22. First mounting boss; 221. Thread; 23. Second mounting boss; 231. First mounting hole; 3. Sealing component; 4. Fixing rod; 5. Fluttering component; 6. Air blowing assembly; 61. Air blowing pipe; 610. Support surface; 611. Limiting protrusion; 62. Mounting plug; 621. Mounting cavity; 622. Second mounting hole; 63. Elastic component; 7. Windproof cover; 71. Third mounting hole; 8. Main suction pipe; 9. Bearing component; 100. Wind speed measuring component. Detailed Implementation

[0036] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0037] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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 this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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, 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 application according to the specific circumstances.

[0039] In this application, unless otherwise expressly 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 being 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 being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] like Figure 1-5 As shown, a preferred embodiment of the present invention provides a cutting device for cutting electrode sheets, comprising a cutting mechanism 1, a suction pipe 2, and a sealing member 3. The suction pipe 2 is connected to the cutting mechanism 1 and has a test hole 201 that communicates with the cavity of the suction pipe 2. The test hole 201 is used for inserting the measuring end of the wind speed measuring device 100 into the cavity of the suction pipe 2. The sealing member 3 is detachably connected to the suction pipe 2 and seals the test hole 201.

[0041] Based on the above-described cutting device, when it is necessary to measure the wind speed inside the suction pipe 2, it is only necessary to remove the sealing part 3 and then insert the measuring end of the wind speed measuring part 100 into the cavity of the suction pipe 2 through the test hole 201 to complete the measurement of the wind speed inside the suction pipe 2. After the measurement is completed, the sealing part 3 is installed on the suction pipe 2 and the test hole 201 is sealed to ensure the normal operation of the suction pipe 2. Therefore, when measuring the wind speed of the suction pipe 2, it is not necessary to disassemble the suction pipe 2. The operation is simple, easy to measure, and time-saving, which can save production time.

[0042] As a specific implementation of this embodiment, the cutting mechanism 1 includes a base, a first cutting blade, a second cutting blade, and a driving member. The base has a cutting channel. The first and second cutting blades are disposed on the base and at least partially located in the cutting channel. One of the first and second cutting blades is fixed, while the other is connected to the driving member. The driving member is used to move the first and second cutting blades closer to each other and further away from each other. When the first and second cutting blades are close to each other, they cut the electrode sheet in the cutting channel. In addition, the cutting mechanism 1 also includes an air knife connected to the base. The air knife has an air duct. The aforementioned suction pipe 2 is connected to the air duct, and the cavity of the suction pipe 2 is connected to the air duct. The suction pipe 2 is connected to a negative pressure component. The negative pressure component, such as a vacuum cleaner, a vacuum compressor, or a vacuum generator, is a device that can generate negative pressure adsorption force. In practical applications, the negative pressure component generates negative pressure adsorption force and causes the suction pipe 2 and the air duct to generate negative pressure airflow, which sucks away the dust particles in the cutting channel.

[0043] The wind speed measuring device 100 is a wind speed tester, which includes a measuring probe. The measuring probe is rod-shaped, and one end of its length is the measuring end.

[0044] like Figure 1 and Figure 2 As shown, the vacuum tube 2 includes a tube body 21 and a first mounting boss 22. The first mounting boss 22 is disposed on the outer peripheral wall of the tube body 21. The side of the first mounting boss 22 facing away from the tube body 21 is provided with a test hole 201, which communicates with the cavity of the tube body 21. The sealing member 3 is connected to the first mounting boss 22. Specifically, since the first mounting boss 22 protrudes from the center of the tube body 21, and has a certain length along the axial direction of the test hole 201, the first mounting boss 22 can provide more positions for the sealing member 3 to connect when the sealing member 3 is connected, thus ensuring the connection stability of the sealing member 3.

[0045] Furthermore, such as Figure 3 and Figure 4 As shown, the first mounting boss 22 is provided with a thread 221, which is located on the wall of the test hole 201. The sealing component 3 is a screw, which is connected to the thread 221. At this time, the first mounting boss 22 can provide a relatively long thread 221, which can ensure the connection stability of the sealing component 3.

[0046] Preferably, the screw is made of plastic or rubber, so that there is no metal friction during disassembly and installation, thus no metal dust is generated, which can avoid contamination of the battery cell formed by winding the electrode sheets.

[0047] In some other embodiments, the first mounting boss 22 is not provided with threads 221, and the material of the sealing member 3 is an elastic sealing material. In this case, the sealing member 3 is inserted into the test hole 201 and is detachably connected to the first mounting boss 22 by means of interference fit. Thus, the sealing member 3 can also seal the test hole 201 and will not generate metal dust.

[0048] In this embodiment, as Figure 2As shown, the pipe body 21 includes a first pipe section 211, a second pipe section 212, and a third pipe section 213. The first pipe section 211 is connected to the cutting mechanism 1, and the third pipe section 213 is used to connect to the negative pressure assembly. The two ends of the second pipe section 212 are detachably and sealingly connected to the first pipe section 211 and the third pipe section 213 along its length direction, so as to connect the first pipe section 211 and the third pipe section 213. The outer peripheral wall of the second pipe section 212 is provided with a first mounting boss 22. Specifically, this type of... Since only the second pipe section 212 is connected to the sealing component 3, the first pipe section 211 and the third pipe section 213 can be standard parts, reducing production costs. After long-term use, the pipe body 21 will inevitably experience thread 221 failure, leading to air leakage. In this case, since the second pipe section 212 is detachably connected to the first pipe section 211 and the third pipe section 213, the pipe body 21 can be maintained by replacing the second pipe section 212, resulting in low maintenance costs.

[0049] The second pipe section 212 is inserted into the first pipe section 211 and the third pipe section 213 at both ends along its length and connected by clamps, which is convenient to install and has high connection reliability.

[0050] Furthermore, such as Figure 2 As shown, the cutting device also includes a fixed rod 4 and a floating component 5, which can float in the wind. The fixed rod 4 is located inside the second pipe section 212, and the floating component 5 is connected to the fixed rod 4. The third pipe section 213 is made of transparent material, and the floating component 5 extends at least partially into the third pipe section 213 when it floats. In practical applications, as mentioned above, the negative pressure component generates airflow when it operates. When this airflow flows in the pipe 21, the floating component 5 will float. Since the third pipe section 213 is made of transparent material, the operator can visually observe whether there is airflow inside the pipe 21, thereby determining whether the negative pressure component is working properly. This can prevent abnormal vacuuming operation and give the cutting device the advantage of easily determining whether the vacuuming operation is abnormal. Specifically, when the floating component 5 floats, it indicates that the vacuuming is working properly, while when the floating component 5 does not float, it indicates that the vacuuming operation is abnormal.

[0051] As a specific implementation of this embodiment, the fluttering component 5 is a ribbon that can flutter with the wind.

[0052] In some other embodiments, the second pipe section 212 is also made of transparent material, which makes it easier for staff to observe whether the floating part 5 is floating; or, the second pipe section 212 is made of transparent material and the third pipe section 213 is made of non-transparent material. In this case, the length of the floating part 5 is designed to be relatively short, so that staff can also observe whether it is floating.

[0053] In practical applications, based on the setting of the test hole 201, regardless of whether the sealing member 3 is completely located within the test hole 201 or partially extended into the cavity of the second pipe section 212, it will interfere with the flow of the aforementioned airflow. Consequently, dust accumulation is likely to occur in the cavity of the second pipe section 212. In this embodiment, such as... Figure 2 As shown, the suction pipe 2 also includes a second mounting boss 23, which is disposed on the outer peripheral wall of the second pipe section 212. The side of the second mounting boss 23 facing away from the second pipe section 212 is provided with a first mounting hole 231, which communicates with the cavity of the second pipe section 212. The cutting device also includes an air blowing assembly 6, which is sealed and connected in the first mounting hole 231. The air blowing assembly 6 is used to blow air into the cavity of the second pipe section 212. Thus, when the cutting device is stopped, air can be blown into the cavity of the second pipe section 212 through the air blowing assembly 6 to avoid dust accumulation in the second pipe section 212 and ensure the dust removal effect. In addition, by using the air blowing assembly 6 to avoid dust accumulation in the second pipe section 212, it is not necessary to disassemble the second pipe section 212 for manual cleaning, which is simple to operate and has high cleaning efficiency.

[0054] As a specific implementation of this embodiment, such as Figure 3 As shown, the air blowing assembly 6 includes an air blowing pipe 61 that extends into the cavity of the second pipe section 212. The outer peripheral wall of the end of the air blowing pipe 61 located inside the cavity of the second pipe section 212 is provided with multiple air blowing holes arranged circumferentially. This structure of the air blowing pipe 61 is beneficial for cleaning the dust accumulated inside the second pipe section 212. The end of the air blowing pipe 61 located outside the second pipe section 212 is connected to a positive pressure air supply assembly. The positive pressure assembly generates airflow to cause the air blowing pipe 61 to blow air into the cavity of the second pipe section 212. The positive pressure air supply assembly is like a fan.

[0055] Preferred, such as Figure 3 As shown, the air blowing pipe 61 has a support surface 610, which is located inside the cavity of the second pipe section 212. The support surface 610 is at least partially facing the test hole 201. The support surface 610 is used to contact the wind speed measuring element 100. Based on the setting of the support surface 610, when the wind speed measuring element 100 is inserted into the cavity of the second pipe section 212 by the operator, when the wind speed measuring element 100 is against the support surface 610 and can no longer move, it indicates that the wind speed measuring element 100 is inserted in place. In addition, the wind speed measuring element 100 being against the support surface 610 can also ensure that the wind speed measuring element 100 is stably arranged when measuring wind speed. Based on the wind speed measuring element 100 being inserted in place and stably arranged, the wind speed measurement result inside the pipe body 21 can be more accurate. That is, in addition to having the function of blowing air to remove dust, the air blowing pipe 61 also has the function of supporting and limiting the position of the wind speed measuring element 100, which can improve the accuracy of wind speed measurement.

[0056] Furthermore, such as Figure 2 and 3As shown, the test hole 201 and the first mounting hole 231 are arranged opposite to each other. The air blowing assembly 6 also includes a mounting plug 62 and an elastic element 63. The mounting plug 62 is sealed to the first mounting hole 231. The mounting plug 62 has a mounting cavity 621 and a second mounting hole 622. The second mounting hole 622 passes through the mounting plug 62 along the axial direction of the first mounting hole 231. The mounting cavity 621 communicates with the second mounting hole 622. The air blowing tube 61 has a limiting protrusion 611, which is located on the outer peripheral wall of the air blowing tube 61. Passing through the second mounting hole 622, the limiting protrusion 611 is located inside the mounting cavity 621. The elastic element 63 is located inside the mounting cavity 621, on the side of the limiting protrusion 611 away from the test hole 201. In the axial direction of the second mounting hole 622, both ends of the elastic element 63 contact the cavity wall of the mounting cavity 621 and the limiting protrusion 611, respectively. In practical applications, after the anemometer contacts the support surface 610, the operator can continue to apply force to compress the elastic element 63, thereby causing the air blowing pipe 61 to retract away from the test hole 201. Figure 5 As shown, when the elastic element 63 is no longer compressed, it indicates that the wind speed measuring element 100 is inserted in place. That is, the air blowing pipe 61 will not interfere with the insertion of the wind speed measuring element 100, thus ensuring the accuracy of wind speed measurement. Based on this, the extension length of the air blowing pipe 61 in the cavity of the second pipe section 212 can be reasonably designed to ensure the effect of the air blowing pipe 61 in cleaning the dust. That is, the setting of the elastic element 63 not only ensures the effect of the air blowing pipe 61 in cleaning the dust, but also avoids the air blowing pipe 61 interfering with the depth of the wind speed tester extending into the cavity of the second pipe section 212, thus ensuring the accuracy of wind speed measurement.

[0057] In this specific implementation, the elastic element 63 is a spring, which is sleeved on the outer periphery of the air blowing pipe 61. Specifically, after the spring is compressed, the center of the anemometer probe can be aligned with the center of the second pipe section 212, thus ensuring the accuracy of the wind speed measurement. Based on this, the selection of the spring depends on the actual application, and the present invention does not impose any restrictions on it.

[0058] In practical applications, the outer diameter of the anemometer probe is smaller than the diameter of the test hole 201 to ensure that the probe can be smoothly inserted into the cavity of the second pipe section 212. However, because the outer diameter of the probe is smaller than the diameter of the test hole 201, airflow will leak between the outer peripheral wall of the probe and the inner wall of the test hole 201 during wind speed measurement, affecting the accuracy of the wind speed measurement. Therefore, to ensure the accuracy of wind speed measurement, further measures are needed, such as... Figure 4As shown, the cutting device also includes a windproof cover 7, which has a third mounting hole 71. The windproof cover 7 is used to cover the test hole 201, and the third mounting hole 71 is used for the wind speed measuring component 100 to pass through. In practical applications, during the wind speed measurement process, after removing the sealing component 3, the windproof cover 7 is first covered on the first mounting boss 22 and the third mounting hole 71 is aligned with the test hole 201. Then, the measuring probe of the wind speed measuring component 100 is inserted into the test hole 201 through the third mounting hole 71 and into the cavity of the second pipe section 212, and the outer peripheral wall of the measuring probe is in contact with the hole wall of the third mounting hole 71. This reduces airflow leakage and ensures the accuracy of wind speed measurement.

[0059] The windproof cover 7 can be made of an elastic material, and the diameter of the third mounting hole 71 is smaller than the outer diameter of the measuring probe. Therefore, after the measuring probe is inserted into the third mounting hole 71, the outer peripheral wall of the measuring probe will come into close contact with the hole wall of the third mounting hole 71, which will play a sealing role, thereby preventing airflow from escaping and further ensuring the accuracy of wind speed measurement.

[0060] In this embodiment, as Figure 1 As shown, the cutting device also includes a dust suction main pipe 8, which is used to connect to the negative pressure component. Multiple dust suction pipes 2 are provided. One end of the dust suction pipe 2 is connected to the cutting mechanism 1 and the other end is connected to the dust suction main pipe 8. The arrangement of multiple dust suction pipes 2 makes the dust removal effect in the electrode cutting process better and ensures the quality of battery cell production.

[0061] Furthermore, such as Figure 1 As shown, the cutting device also includes a carrier 9, which is mounted on the main suction pipe 8. The carrier 9 is used to support the windproof cover 7. Specifically, when wind speed measurement is not required, the carrier 9 can be used to support the windproof cover 7 to avoid loss. When the carrier 9 is mounted on the main suction pipe 8, it is convenient to pick up and take the windproof cover 7 when wind speed measurement is required, thus improving efficiency.

[0062] As a specific implementation of this embodiment, the support member 9 is a hook, which passes through the third mounting hole 71 to support the windproof cover 7.

[0063] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A cutting device for cutting electrode sheets, characterized in that, It includes a cutting mechanism (1), a vacuum tube (2), and a sealing component (3). The suction pipe (2) is connected to the cutting mechanism (1). The suction pipe (2) is provided with a test hole (201). The test hole (201) is connected to the cavity of the suction pipe (2). The test hole (201) is used to allow the measuring end of the wind speed measuring device (100) to be inserted into the cavity of the suction pipe (2). The sealing element (3) is detachably connected to the suction pipe (2), and the sealing element (3) seals the test hole (201). The suction pipe (2) includes a pipe body (21), and the pipe body (21) includes a second pipe section (212); The vacuum pipe (2) also includes a second mounting boss (23), which is disposed on the outer peripheral wall of the second pipe section (212). The side of the second mounting boss (23) facing away from the second pipe section (212) is provided with a first mounting hole (231), which is connected to the cavity of the second pipe section (212). The cutting device further includes an air blowing assembly (6), which is sealed and connected to the first mounting hole (231). The air blowing assembly (6) is used to blow air into the cavity of the second pipe section (212). The blowing assembly (6) includes a blowing tube (61) extending into the cavity of the second pipe segment (212), the blowing tube (61) having a support surface (610) located within the cavity of the second pipe segment (212) and the support surface (610) at least partially facing the test hole (201), the support surface (610) being used to contact the wind speed measuring element (100); The test hole (201) and the first mounting hole (231) are arranged opposite to each other. The air blowing assembly (6) also includes a mounting plug (62) and an elastic element (63). The mounting plug (62) is sealed to the first mounting hole (231). The mounting plug (62) has a mounting cavity (621) and a second mounting hole (622). The second mounting hole (622) passes through the mounting plug (62) along the axial direction of the first mounting hole (231). The mounting cavity (621) communicates with the second mounting hole (622). The air blowing pipe (61) has a limiting protrusion (611) located on the outer peripheral wall of the air blowing pipe (61). The air blowing pipe (61) passes through the second mounting hole (622), and the limiting protrusion (611) is located within the mounting cavity (621). The elastic element (63) is disposed in the mounting cavity (621) and located on the side of the limiting protrusion (611) away from the test hole (201). In the axial direction of the second mounting hole (622), the two ends of the elastic element (63) are in contact with the cavity wall of the mounting cavity (621) and the limiting protrusion (611), respectively.

2. The cutting device according to claim 1, characterized in that, The vacuum tube (2) includes a first mounting boss (22), which is disposed on the outer peripheral wall of the tube body (21). The side of the first mounting boss (22) facing away from the tube body (21) is provided with the test hole (201), which is connected to the tube cavity of the tube body (21). The sealing member (3) is connected to the first mounting boss (22).

3. The cutting device according to claim 2, characterized in that, The first mounting boss (22) is provided with a thread (221), and the thread (221) is located on the wall of the test hole (201). The sealing element (3) is a screw, which is connected to the thread (221).

4. The cutting device according to claim 3, characterized in that, The screw is made of plastic or rubber.

5. The cutting device according to any one of claims 2-4, characterized in that, The tube body (21) includes a first tube segment (211) and a third tube segment (213). The first tube segment (211) is connected to the cutting mechanism (1), and the third tube segment (213) is used to connect to the negative pressure assembly. The second tube segment (212) is detachably and sealingly connected to the first tube segment (211) and the third tube segment (213) at both ends along its length direction, so as to connect the first tube segment (211) and the third tube segment (213). The second pipe section (212) has the first mounting boss (22) on its outer peripheral wall.

6. The cutting device according to claim 5, characterized in that, It also includes a fixed rod (4) and a swaying component (5), which can sway in the wind; The fixed rod (4) is installed inside the second pipe section (212), and the floating part (5) is connected to the fixed rod (4); The second pipe section (212) and / or the third pipe section (213) are made of transparent material.

7. The cutting device according to claim 1, characterized in that, It also includes a wind shield (7), which has a third mounting hole (71) for covering the test hole (201) and for the wind speed measuring element (100) to pass through.

8. The cutting device according to claim 7, characterized in that, It also includes a suction head (8) for connection to a negative pressure assembly. The vacuum tube (2) is provided in multiple ways. One end of the vacuum tube (2) is connected to the cutting mechanism (1), and the other end is connected to the main vacuum tube (8).

9. The cutting device according to claim 8, characterized in that, It also includes a support member (9), which is disposed on the main suction tube (8) and is used to support the windproof cover (7).

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