Method for compressing thermal insulation cotton

Abstract

This invention relates to a method for compressing thermal insulation cotton, comprising the following steps: laying the thermal insulation cotton to be compacted on a base plate and passing it through thermal insulation nails welded to the base plate; adjusting the height of the baffle inside the hollow compaction fixture according to a preset compression amount; fitting the adjusted hollow compaction fixture onto the thermal insulation nails and pressing the hollow compaction fixture down until the top of the thermal insulation nails abuts against the baffle, with the pressure plate fitted onto the thermal insulation nails positioned at the required compaction height of the thermal insulation cotton; welding the pressure plate to the thermal insulation nails and removing the hollow compaction fixture; this setup, compared to existing methods of compressing with manual footsteps or using heavy objects to compress and then fix the thermal insulation cotton, is simple and efficient in construction, and can precisely control the compression amount of the thermal insulation cotton, ensuring consistent compression amounts in all parts.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation cotton technology, and in particular to a method for compressing thermal insulation cotton. Background Technology

[0002] Currently, thermal insulation cotton, with its excellent thermal insulation properties, is widely used in industrial and construction fields, and is one of the key materials for achieving energy conservation, reducing consumption, and improving ambient temperature. In practical applications, thermal insulation cotton is usually in a loose state. In order to meet installation size requirements, ensure fixing stability, and ensure uniformity of insulation effect, it often needs to be compressed to a certain thickness for fixing. Therefore, the compression operation of thermal insulation cotton is one of the core steps in its installation process.

[0003] Currently, the industry mainly uses two traditional methods for compressing and fixing thermal insulation cotton: First, construction workers directly step on the thermal insulation cotton with their feet, and fix it after subjectively judging that the thickness has reached the approximate required thickness; second, a heavy object is placed on the surface of the thermal insulation cotton, and the thermal insulation cotton is compressed by the gravity of the heavy object. After observing that the thickness of the thermal insulation cotton meets the requirements, the fixing work is completed.

[0004] However, both of the aforementioned traditional compression and fixing methods have significant defects and shortcomings, making it difficult to meet the requirements of modern construction for precision, efficiency, and quality stability. On the one hand, the precision of compaction control is extremely low. Whether it is manual trampling or heavy object covering, it relies on the subjective judgment and experience of the construction personnel, making it impossible to accurately control the amount of compression of the insulation cotton. This results in significant differences in the thickness of the insulation cotton compression in different parts of the same construction area, which not only affects the flatness of the insulation cotton installation but also leads to uneven insulation effect due to insufficient or excessive local compression, and may even reduce the overall insulation performance. On the other hand, the construction efficiency is low. The manual trampling method is labor-intensive, and the handling range of a single person is limited. The heavy object covering method requires frequent handling, placement, and removal of heavy objects, making the operation process cumbersome and significantly increasing the construction time cost, making it difficult to adapt to the needs of large-scale, high-efficiency construction.

[0005] In summary, the existing insulation cotton compression and fixing technologies suffer from insufficient compaction accuracy and low construction efficiency, which have become key bottlenecks restricting the quality and progress of insulation cotton installation. The industry urgently needs a technical solution that can achieve rapid and accurate compression and fixing of insulation cotton to overcome the shortcomings of existing technologies. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for compressing thermal insulation cotton, which has the advantages of improving compaction accuracy and efficiency, shortening construction time, and ensuring the construction quality of thermal insulation cotton.

[0007] The above-mentioned objective of this invention is achieved through the following technical solution: a method for compressing thermal insulation cotton, comprising the following steps:

[0008] The insulation cotton to be compacted is laid on the base plate and passed through the insulation nails welded on the base plate;

[0009] Adjust the height of the baffle inside the hollow compaction fixture according to the preset compression amount;

[0010] The adjusted hollow compaction fixture is fitted onto the insulation nail, and the hollow compaction fixture is pressed down until the top of the insulation nail abuts against the baffle. The pressure plate fitted onto the insulation nail is located at the required compaction height of the insulation cotton to be compacted.

[0011] Weld the pressure plate to the insulation nail and remove the hollow compaction fixture.

[0012] Preferably, the thermal insulation cotton compression method provided by the present invention, wherein the step of laying the thermal insulation cotton to be compressed on the base plate and passing through the thermal insulation nails welded to the base plate, includes:

[0013] Multiple insulation nails are welded onto the base plate, and the multiple insulation nails are arranged in a rectangular array.

[0014] The insulation cotton to be compacted is threaded through multiple insulation nails and laid on the base plate;

[0015] The cotton pressing board is passed through multiple insulation nails and laid on the insulation cotton to be compacted.

[0016] Preferably, in the thermal insulation cotton compression method provided by the present invention, the hollow compaction fixture includes a sleeve, a pressure claw, and a stop unit. The top end of the sleeve is covered with a sealing plate, and a through hole is formed on the sealing plate, which communicates with the cavity of the sleeve. The top end of the pressure claw is inserted into the bottom end of the sleeve, and the pressure claw forms a rotating cavity, which is connected to the cavity of the sleeve. The bottom end of the stop unit passes through the through hole and is inserted into the cavity of the sleeve, and the top end of the stop unit extends to the outside of the sleeve. The stop unit can move relative to the sleeve to adjust the preset compression amount.

[0017] Preferably, in the thermal insulation cotton compression method provided by the present invention, the stop unit includes a screw and a baffle. The baffle is located in the cavity of the sleeve and can slide relative to the sleeve. The bottom end of the screw passes through the through hole and is inserted into the cavity of the sleeve and connected to the top surface of the baffle. The top end of the screw extends to the outside of the sleeve and is threadedly connected to a locking nut. The locking nut is located on the sealing plate, and the screw can move relative to the sleeve. When adjusting the preset compression amount, the locking nut is loosened, and the screw is moved along the center line of the sleeve. After the screw drives the baffle to move to a preset height, the locking nut is locked.

[0018] Preferably, in the thermal insulation cotton compression method provided by the present invention, the outer peripheral wall of the screw is engraved with a scale.

[0019] Preferably, in the thermal insulation cotton compression method provided by the present invention, the hollow compaction tool further includes a handle, which is disposed on the outer peripheral wall near the top end of the sleeve.

[0020] Preferably, the thermal insulation cotton compression method provided by the present invention includes adjusting the height of the baffle in the hollow compaction fixture according to the preset compression amount, which includes: loosening the locking nut, moving the screw along the center line of the sleeve according to the preset compression amount, the screw driving the baffle to move to the preset height, and locking the locking nut.

[0021] Preferably, the thermal insulation cotton compression method provided by the present invention includes the following steps: fitting the adjusted hollow compaction fixture onto the thermal insulation nail, pressing the hollow compaction fixture down until the top of the thermal insulation nail abuts against the baffle, and positioning the pressure plate fitted onto the thermal insulation nail at the required compaction height of the thermal insulation cotton to be compacted.

[0022] A pressure plate is fitted onto the insulation nail, and the pressure plate can slide along the insulation nail;

[0023] The top end of the insulation nail is inserted into the cavity of the sleeve through the pressure claw, and the bottom end of the pressure claw contacts the top surface of the pressure plate.

[0024] Press the hollow compaction fixture downwards, and the hollow compaction fixture pushes the pressure plate downwards along the insulation nail until the top of the insulation nail abuts against the bottom surface of the baffle. Stop applying downward pressure to the hollow compaction fixture, and the pressure plate reaches the position where the insulation cotton to be compacted is required to reach the compaction height.

[0025] Preferably, the thermal insulation cotton compression method provided by the present invention, wherein welding the pressure plate to the thermal insulation nail and removing the hollow compaction fixture includes:

[0026] The insulation nail is welded to the pressure plate through the gap between two adjacent claws on the pressure claw;

[0027] Remove the hollow compaction fixture.

[0028] Preferably, in the thermal insulation cotton compression method provided by the present invention, the formula for calculating the distance from the baffle to the bottom surface of the pressing claw is:

[0029] L = H + (SD)

[0030] In the formula, L is the distance from the baffle to the bottom surface of the pressure claw; H is the preset compression amount of the insulation cotton to be compacted; S is the height of the insulation nail; and D is the initial thickness of the insulation cotton to be compacted.

[0031] In summary, the beneficial technical effects of the present invention are as follows: The thermal insulation cotton compression method provided in this application includes the following steps: laying the thermal insulation cotton to be compressed on a base plate and passing it through the thermal insulation nails welded to the base plate; adjusting the height of the baffle inside the hollow compaction fixture according to the preset compression amount; fitting the adjusted hollow compaction fixture onto the thermal insulation nails, pressing the hollow compaction fixture down until the top of the thermal insulation nails abuts against the baffle, and the pressure plate fitted onto the thermal insulation nails is located at the required compaction height of the thermal insulation cotton to be compressed; welding the pressure plate to the thermal insulation nails and removing the hollow compaction fixture; this setup, compared with the existing methods of using manual stepping to compress and then fixing the thermal insulation cotton after compression with heavy objects, is simple and efficient in construction, and can accurately control the compression amount of the thermal insulation cotton, ensuring that the compression amount of each part is consistent. Attached Figure Description

[0032] Figure 1 This is a flowchart of the thermal insulation cotton compression method provided in the embodiments of the present invention.

[0033] Figure 2 This is a schematic diagram of the connection structure of the hollow compaction tool, the base plate, and the insulation nails in the insulation cotton compression method provided in this embodiment of the invention.

[0034] Figure 3 This is a cross-sectional view of the connection structure of the hollow compaction tool, the base plate, and the insulation nails in the insulation cotton compression method provided in this embodiment of the invention.

[0035] Figure 4 This is a front view of the connection structure of the hollow compaction tool, the base plate, and the insulation nails in the insulation cotton compression method provided in this embodiment of the invention.

[0036] Figure 5 This is a front view of the hollow compaction fixture in the thermal insulation cotton compression method provided in this embodiment of the invention.

[0037] Figure 6 This is a top view of the hollow compaction fixture in the thermal insulation cotton compression method provided in this embodiment of the invention.

[0038] Figure 7 This is a cross-sectional view of the hollow compaction fixture in the thermal insulation cotton compression method provided in this embodiment of the invention.

[0039] In the diagram, 1. Insulation cotton to be compacted; 2. Base plate; 3. Insulation nail; 4. Pressure plate; 41. Groove; 42. Sliding hole; 5. Hollow compaction fixture; 51. Sleeve; 511. Sealing plate; 512. Limiting flange; 52. Pressure claw; 521. First tube body; 522. Second tube body; 523. Claw; 53. Stop unit; 531. Screw; 532. Baffle; 533. Guide nut; 534. Locking nut; 54. Handle; 541. Threaded tube; 542. Grip part. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Reference Figures 1 to 4 The present invention discloses a method for compressing thermal insulation cotton, comprising the following steps:

[0042] S101. Lay the insulation cotton 1 to be compacted on the base plate 2 and pass it through the insulation nails 3 welded on the base plate 2;

[0043] S102. Adjust the height of the baffle 532 inside the hollow compaction fixture 5 according to the preset compression amount;

[0044] S103. The adjusted hollow compaction fixture 5 is fitted onto the insulation nail 3, and the hollow compaction fixture 5 is pressed down until the top of the insulation nail 3 abuts against the baffle 532. The pressure plate 4 fitted onto the insulation nail 3 is located at the required compaction height of the insulation cotton to be compacted.

[0045] S104. Weld the pressure plate 4 to the insulation nail 3 and remove the hollow compaction fixture 5. This setup, compared with the traditional method of compressing and fixing insulation cotton, improves the compaction accuracy and efficiency, shortens the construction time, and ensures the construction quality of the insulation cotton.

[0046] It should be noted that the pre-compression amount is the amount of insulation cotton that needs to be compressed. In other words, the pre-compression amount = the initial thickness of the insulation cotton to be compressed - the required thickness of the insulation cotton to be compressed.

[0047] Further, in this embodiment, step S101, laying the insulation cotton 1 to be compacted on the base plate 2 and passing it through the insulation nails 3 welded to the base plate 2, includes:

[0048] S1011. Weld multiple insulation nails 3 onto the base plate 2, with the multiple insulation nails 3 arranged in a rectangular array.

[0049] S1012. Pass the insulation cotton 1 to be compacted through multiple insulation nails 3 and lay it on the base plate 2;

[0050] S1013. Pass the cotton pressing board through multiple insulation nails 3 and lay it on the insulation cotton 1 to be compacted.

[0051] Specifically, the extension direction of the insulation nail 3 is perpendicular to that of the base plate 2.

[0052] Continue to refer to Figures 5 to 7 In this embodiment, the hollow compaction fixture 5 includes a sleeve 51, a pressure claw 52, ​​and a stop unit 53. The top end of the sleeve 51 is covered with a sealing plate 511, and a through hole is opened on the sealing plate 511. The through hole communicates with the cavity of the sleeve 51. The top end of the pressure claw 52 is inserted into the bottom end of the sleeve 51. The pressure claw 52 surrounds a rotating cavity, which is connected to the cavity of the sleeve 51. The bottom end of the stop unit 53 passes through the through hole and is inserted into the cavity of the sleeve 51. The top end of the stop unit 53 extends to the outside of the sleeve 51. The stop unit 53 can move relative to the sleeve 51 to adjust the preset compression amount.

[0053] Furthermore, in this embodiment, the pressure claw 52 includes a first tube 521 and a second tube 522. The bottom end of the first tube 521 is connected to the top end of the second tube 522. A plurality of claws 523 are provided at the end of the second tube 522 away from the first tube 521. The plurality of claws 523 are arranged circumferentially around the second tube 522 at intervals, that is, there is a gap between every two adjacent claws 523.

[0054] The outer diameter of the first tube 521 is smaller than the outer diameter of the sleeve 51, the outer diameter of the sleeve 51 is smaller than the outer diameter of the second tube 522, the first tube 521 forms a first chamber, the second tube 522 forms a second chamber, the first chamber and the second chamber are connected and together form a rotating cavity.

[0055] During installation, the first tube 521 is inserted into the cavity at the bottom of the sleeve 51, the outer peripheral wall of the first tube 521 is fitted and connected to the inner peripheral wall of the sleeve 51, and the bottom end of the sleeve 51 abuts against the top end of the second tube 522.

[0056] Furthermore, in this embodiment, the stop unit 53 includes a screw 531 and a baffle 532. The baffle 532 is located in the cavity of the sleeve 51 and can slide relative to the sleeve 51. The bottom end of the screw 531 passes through the through hole and is inserted into the cavity of the sleeve 51 and connected to the top surface of the baffle 532. The top end of the screw 531 extends to the outside of the sleeve 51 and is threadedly connected to the locking nut 534. The locking nut 534 is located on the sealing plate 511, and the screw 531 can move relative to the sleeve 51. When adjusting the preset compression amount, the locking nut 534 is loosened, and the screw 531 is moved along the center line of the sleeve 51. After the screw 531 drives the baffle 532 to move to the preset height, the locking nut 534 is locked.

[0057] Specifically, in the initial position, the bottom surface of the baffle 532 is in contact with the top surface of the first tube 521.

[0058] Both the baffle and the pressure plate are plate-shaped, and the baffle is perpendicular to the extension direction of the screw. When the baffle 532 moves to the preset position, the formula for calculating the distance between the baffle 532 and the bottom surface of the pressure claw 52 is as follows:

[0059] L = H + (SD)

[0060] In the formula, L is the distance from the bottom surface of the baffle 532 to the pressure claw 52; H is the preset compression amount of the insulation cotton to be compacted; S is the height of the insulation nail 3; and D is the initial thickness of the insulation cotton to be compacted.

[0061] In some feasible ways, the pressure plate 4 has a downwardly recessed groove 41 at its center, and a sliding hole 42 is provided at the bottom end of the groove 41. The sliding hole 42 passes through the bottom end of the groove 41, and the top end of the insulation nail 3 passes through the sliding hole 42.

[0062] During use, the top of the insulation nail 3 is inserted into the cavity of the sleeve 51 through the pressure claw 52, ​​and the bottom end of the pressure claw 52 is inserted into the groove 41 and contacts the inner bottom surface of the groove 41. This arrangement prevents the pressure plate 4 from sliding between the pressure plate 4 and the pressure claw 52 when the pressure plate 4 is pressed down.

[0063] The formula for calculating the distance from the baffle 532 to the bottom surface of the pressure claw 52 is as follows:

[0064] L = H + (SD) + W

[0065] In the formula, L is the distance from the bottom surface of the baffle 532 to the pressure claw 52; H is the preset compression amount of the insulation cotton to be compacted; S is the height of the insulation nail 3; D is the initial thickness of the insulation cotton to be compacted; and W is the depth of the groove 41.

[0066] In this embodiment, the center line of the screw 531 is arranged parallel to the center line of the sleeve 51. In some possible implementations, the center line of the screw 531 is arranged collinearly with the center line of the sleeve 51.

[0067] To prevent the screw 531 from wobbling when it moves along the center line of the sleeve 51, a guide nut 533 is provided in the cavity of the sleeve 51. The outer peripheral wall of the guide nut 533 is in close contact with the inner peripheral wall of the sleeve 51. The baffle 532 is located between the guide nut 533 and the first tube body 521. The bottom end of the screw 531 passes through the through hole and is inserted into the cavity of the sleeve 51. It is screwed through the guide nut 533 and connected to the top surface of the baffle 532. The screw 531 and the guide nut 533 are connected by threads.

[0068] like Figure 7As shown, in this embodiment, there are two guide nuts 533. Of course, the number of guide nuts 533 can also be one or three.

[0069] When adjusting the preset compression amount, loosen the locking nut 534, rotate the screw 531, the screw 531 moves along the center line of the sleeve 51, the screw 531 drives the baffle 532 to move to the preset height, and then lock the locking nut 534.

[0070] To facilitate understanding the travel length of screw 531, graduations are engraved on the outer peripheral wall of screw 531. During use, after adjusting the height of the baffle through the screw graduations, a vernier caliper is used to measure the distance from the baffle to the bottom surface of the pressure claw, with the error controlled within ±0.5mm.

[0071] Furthermore, in this embodiment, the hollow compaction fixture 5 also includes a handle 54, which is disposed on the outer peripheral wall near the top end of the sleeve 51; by providing the handle 54, it is convenient to press down the hollow compaction fixture 5.

[0072] The handle 54 includes a threaded tube 541 and two gripping parts 542 arranged opposite to each other. Both gripping parts 542 are disposed on the outer peripheral wall of the threaded tube 541. One end of the gripping part 542 is connected to the outer peripheral wall of the threaded tube 541, and the other end of the gripping part 542 extends outward along the radial direction of the threaded tube 541.

[0073] Specifically, an external thread is provided on the outer peripheral wall near the top of the sleeve 51. The external thread is adapted to the internal thread of the threaded tube 541. The threaded tube 541 is screwed onto the outer peripheral wall near the top of the sleeve 51, and the threaded tube 541 is threadedly connected to the sleeve 51.

[0074] To prevent the threaded tube 541 from moving along the sleeve 51 when the hollow compaction tool 5 is pressed down, a limiting flange 512 is provided on the outer peripheral wall of the sleeve 51. The limiting flange 512 extends outward along the radial direction of the sleeve 51. The threaded tube 541 is screwed onto the outer peripheral wall near the top of the sleeve 51, and the bottom end of the threaded tube 541 abuts against the top surface of the limiting flange 512.

[0075] Continue to refer to Figures 1 to 4 In this embodiment, S102, adjusting the height of the baffle 532 inside the hollow compaction fixture 5 according to the preset compression amount, includes: loosening the locking nut 534, moving the screw 531 along the center line of the sleeve 51 according to the preset compression amount, the screw 531 driving the baffle 532 to move to the preset height, and locking the locking nut 534.

[0076] Specifically, when adjusting the preset compression amount, loosen the locking nut 534, rotate the screw 531, and the screw 531 moves along the center line of the sleeve 51. After the screw 531 drives the baffle 532 to the preset height, tighten the locking nut 534. When the pressure plate does not have a groove, the distance L from the bottom surface of the baffle 532 to the pressure claw 52 is L = H + (SD), where L is the distance from the bottom surface of the baffle 532 to the pressure claw 52, ​​and H is the distance to be compacted and heated. The preset compression amount of the cotton; S is the height value of the insulation nail 3; D is the initial thickness value of the insulation cotton to be compacted; when a groove is set on the pressure plate, the formula for calculating the distance from the bottom surface of the baffle 532 to the pressure claw 52 is: L=H+(SD)+W Where, L is the distance from the bottom surface of the baffle 532 to the pressure claw 52; H is the preset compression amount of the insulation cotton to be compacted; S is the height value of the insulation nail 3; D is the initial thickness value of the insulation cotton to be compacted; W is the depth value of the groove 41.

[0077] Further, in this embodiment, S103, the adjusted hollow compaction fixture 5 is fitted onto the insulation nail 3, and the hollow compaction fixture 5 is pressed down until the top of the insulation nail 3 abuts against the baffle 532. The pressure plate 4 fitted onto the insulation nail 3 is positioned at the required compaction height of the insulation cotton to be compacted, including:

[0078] S1031. A pressure plate 4 is fitted onto the insulation nail 3, and the pressure plate 4 can slide along the insulation nail 3;

[0079] S1032. Insert the top of the insulation nail 3 through the pressure claw 52 into the cavity of the sleeve 51, and the bottom of the pressure claw 52 contacts the top surface of the pressure plate 4.

[0080] S1033, Press down the hollow compaction fixture 5. The hollow compaction fixture 5 pushes the pressure plate 4 downward along the insulation nail 3 until the top of the insulation nail 3 abuts against the bottom surface of the baffle 532. Stop applying downward pressure to the hollow compaction fixture 5. The pressure plate 4 reaches the position where the insulation cotton to be compacted is required to reach the compaction height.

[0081] Further, in this embodiment, S104, welding the pressure plate 4 to the insulation nail 3 and removing the hollow compaction fixture 5 includes:

[0082] S1041. Weld the insulation nail 3 to the pressure plate 4 through the gap between two adjacent claws 523 on the pressure claw 52.

[0083] S1042, Remove the hollow compaction fixture 5.

[0084] Repeat steps S103-S104 until all pressure plates 4 on the multiple insulation nails 3 reach the preset compression position of the insulation cotton. After the insulation cotton 1 is compressed and fixed, use a thickness gauge to check the thickness of each part of the insulation cotton to ensure that the thickness difference does not exceed 1mm.

[0085] It should be noted that for insulation cotton with good flexibility, anti-slip textures can be added to the bottom surface of the pressure plate to prevent the insulation cotton from sliding during compression.

[0086] The insulation cotton compression method provided in this application includes the following steps: laying the insulation cotton 1 to be compressed on the base plate 2 and passing it through the insulation nail 3 welded on the base plate 2; adjusting the height of the baffle 532 inside the hollow compaction fixture 5 according to the preset compression amount; fitting the adjusted hollow compaction fixture 5 onto the insulation nail 3 and pressing down the hollow compaction fixture 5 until the top of the insulation nail 3 abuts against the baffle 532, and the pressure plate 4 fitted onto the insulation nail 3 is located at the required compaction height of the insulation cotton to be compressed; welding the pressure plate 4 to the insulation nail 3 and removing the hollow compaction fixture 5; this setup, compared with the existing method of using manual stepping to compress and then fixing the insulation cotton after compression with heavy objects, is simple and efficient in construction, and can accurately control the compression amount of the insulation cotton, ensuring that the compression amount of each part is consistent.

[0087] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0088] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for compressing thermal insulation cotton, characterized in that: A hollow compaction fixture is used, including a sleeve, pressure claws, and a stop unit. The top of the sleeve is covered with a sealing plate, and the sealing plate has a through hole that communicates with the cavity of the sleeve. The top of the pressure claw is inserted into the bottom of the sleeve, and the pressure claw forms a rotating cavity that is connected to the cavity of the sleeve. The bottom of the stop unit passes through the through hole and is inserted into the cavity of the sleeve. The top of the stop unit extends to the outside of the sleeve, and the stop unit can move relative to the sleeve. The stop unit includes a screw and a baffle. The baffle is located in the cavity of the sleeve and can slide relative to the sleeve. The bottom end of the screw passes through the through hole and is inserted into the cavity of the sleeve and connected to the top surface of the baffle. The top end of the screw extends to the outside of the sleeve and is threadedly connected to a locking nut. The locking nut is located on the sealing plate, and the screw can move relative to the sleeve. The method includes the following steps: The insulation cotton to be compacted is laid on the base plate and passed through the insulation nails welded on the base plate; Adjust the height of the baffle inside the hollow compaction fixture according to the preset compression amount; A pressure plate is fitted onto the insulation nail, and the pressure plate can slide along the insulation nail; The top end of the insulation nail is inserted into the cavity of the sleeve through the pressure claw, and the bottom end of the pressure claw contacts the top surface of the pressure plate. Press the hollow compaction fixture downwards, and the hollow compaction fixture pushes the pressure plate downwards along the insulation nail until the top of the insulation nail abuts against the bottom surface of the baffle. Stop applying downward pressure to the hollow compaction fixture, and the pressure plate reaches the position where the insulation cotton to be compacted is required to reach the compaction height. Weld the pressure plate to the insulation nail and remove the hollow compaction fixture.

2. The method for compressing thermal insulation cotton according to claim 1, characterized in that: The process of laying the insulation cotton to be compacted on the base plate and passing through the insulation nails welded to the base plate includes: Multiple insulation nails are welded onto the base plate, and the multiple insulation nails are arranged in a rectangular array. The insulation cotton to be compacted is threaded through multiple insulation nails and laid on the base plate; The pressure plate is passed through multiple insulation nails and laid on the insulation cotton to be compacted.

3. The method for compressing thermal insulation cotton according to claim 1, characterized in that: The screw has graduations engraved on its outer peripheral wall.

4. The method for compressing thermal insulation cotton according to claim 1, characterized in that: The hollow compaction tool also includes a handle, which is located on the outer peripheral wall near the top of the sleeve.

5. The method for compressing thermal insulation cotton according to claim 1, characterized in that: The step of adjusting the height of the baffle inside the hollow compaction fixture according to the preset compression amount includes: Loosen the locking nut, and move the screw along the center line of the sleeve according to the preset compression amount. The screw drives the baffle to move to the preset height and lock the locking nut.

6. The method for compressing thermal insulation cotton according to claim 1, characterized in that: The step of welding the pressure plate to the insulation nail and removing the hollow compaction fixture includes: The insulation nail is welded to the pressure plate through the gap between two adjacent claws on the pressure claw; Remove the hollow compaction fixture.

7. The method for compressing thermal insulation cotton according to claim 5, characterized in that: The formula for calculating the distance from the baffle to the bottom surface of the pressure claw is: L = H + (SD) In the formula, L is the distance from the baffle to the bottom surface of the pressure claw; H is the preset compression amount of the insulation cotton to be compacted; S is the height of the insulation nail; and D is the initial thickness of the insulation cotton to be compacted.

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