A multi-layer non-woven fabric production equipment with adjustable conveyor belt

Abstract

The present invention seeks to protect a multi-layer non-woven fabric production equipment with an adjustable conveyor belt, which includes a first frame, at least one upper frame is arranged above the first frame; an upper transmission roller group is arranged on the upper frame, and an upper conveyor belt is arranged on the upper transmission roller group; a first transmission roller group and a first height adjustment roller are arranged on the first frame, a first transmission roller group and a first height adjustment roller are arranged on the first frame, and a first conveyor belt is arranged on the first transmission roller group, the first transmission roller group is used to drive the first conveyor belt to operate, and a first transmission surface for carrying a fiber web is formed above the first conveyor belt, and the first height adjustment roller is used to contact the first transmission surface of the first conveyor belt, so as to adjust the distance between the first transmission surface of the first conveyor belt and the upper conveyor belt. The first height adjustment roller of the present application can adjust the distance between the first conveyor belt and the upper conveyor belt, so as to adapt to different fiber webs and allow them to be transferred better.

Description

Technical Field

[0001] The invention relates to the technical field of nonwoven fabrics, and more particularly to a multi-layer nonwoven fabric production device with an adjustable conveyor belt. Background Art

[0002] The anti-sticking spinning unit is used to melt the fiber raw materials into filaments and spray them onto the web laying machine to form a fiber web. When it is necessary to produce a multi-layer fiber web, the traditional method is to set up multiple anti-sticking spinning units on the web laying machine, that is, to let the upper fiber web be directly laid from the anti-sticking spinning unit to the lower fiber web, and finally form a multi-layer fiber web.

[0003] After the technology was improved, a multi-layer web-laying machine structure emerged. A single-layer fiber web was first formed on the first web-laying machine at the bottom, and then the fiber web from the upper web-laying machine was dropped and transferred to the first web-laying machine, and finally overlapped into multiple layers of non-woven fabrics. The position where the fibers on the upper web-laying machine were pulled off was related to the fiber structure itself, the conveyor belt angle, the conveyor belt speed, and the pulling-off structure. Therefore, the height at which the fibers on the upper web-laying machine were pulled off could not be determined. If the fibers fell from an inappropriate height onto the first web-laying machine, it would easily cause wrinkles, dislocations, or even ruptures on the cloth surface, thus forcing the equipment to stop.

[0004] Therefore, how to better transfer the fiber web is exactly the technical problem to be solved by this application. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a multi-layer non-woven fabric production device with an adjustable conveyor belt, which can adjust the height and angle of the conveyor belt to better transfer the fiber web.

[0006] The present invention provides a multi-layer non-woven fabric production device with an adjustable conveyor belt, and the technical solution is as follows:

[0007] A multi-layer nonwoven fabric production device with an adjustable conveyor belt, characterized in that it comprises a first frame, and at least one upper frame is arranged above the first frame;

[0008] An upper transmission roller group is arranged on the upper frame, an upper conveyor belt is arranged on the upper transmission roller group, and the upper transmission roller group is used to drive the upper conveyor belt to operate;

[0009] The first frame is provided with a first transmission roller group and a first height-adjusting roller, the first transmission roller group is provided with a first conveyor belt, the first transmission roller group is used to drive the first conveyor belt to operate, a first conveying surface for carrying the fiber web is formed above the first conveyor belt, and the first height-adjusting roller is used to contact the first conveying surface of the first conveyor belt, so as to adjust the distance between the first conveying surface of the first conveyor belt and the upper conveyor belt.

[0010] In summary, the above technical solution has the following beneficial effects: the present application arranges an upper frame on the first frame to allow the single-layer fiber web on the upper conveyor belt to be transferred to the first conveyor belt, thereby stacking to form multiple layers of non-woven fabric. The first height adjustment roller on the first frame can adjust the distance between the first conveyor belt and the upper conveyor belt, thereby adapting to different fiber webs and allowing them to be better transferred. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of a first frame of a multi-layer nonwoven fabric production device with an adjustable conveyor belt;

[0012] Figure 2 It is a schematic diagram of an enlarged view of a first frame of a multi-layer non-woven fabric production device with an adjustable conveyor belt;

[0013] Figure 3 A schematic diagram of a first tensioning roller of a multi-layer nonwoven fabric production device with an adjustable conveyor belt;

[0014] Figure 4 A schematic diagram of an upper frame of a multi-layer nonwoven fabric production equipment with an adjustable conveyor belt;

[0015] Figure 5 It is a schematic diagram of a third embodiment of a multi-layer non-woven fabric production device with an adjustable conveyor belt;

[0016] Figure 6 This is a schematic diagram of Example 5 of a multi-layer non-woven fabric production device with an adjustable conveyor belt.

[0017] : Reference numerals: 10, first frame; 11, first conveyor belt; 111, upslope; 112, downslope; 12, first transmission roller group; 121, first tensioning roller; 122, first active roller; 123, first deviation correction roller; 124, first support roller; 13, first height adjustment roller; 14, height adjustment member; 20, upper frame; 21, upper conveyor belt; 211, upper slope; 212, downslope; 22, upper transmission roller group; 221, upper active roller; 222, upper deviation correction roller; 223, upper support roller; 23, upper tensioning roller; 30, tension member; 31, connecting rod; 32, fixed disk; 40, first anti-sticking spinning unit; 50, upper anti-sticking spinning unit. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1-4 As shown, a multi-layer non-woven fabric production equipment with an adjustable conveyor belt includes a first frame, at least one upper frame 20 is arranged above the first frame 10; an upper transmission roller group 22 is arranged on the upper frame 20, and an upper conveyor belt 21 is arranged on the upper transmission roller group 22, and the upper transmission roller group 22 is used to drive the upper conveyor belt 21 to operate; a first transmission roller group 12 and a first height adjustment roller 13 are arranged on the first frame 10, and a first conveyor belt 11 is arranged on the first transmission roller group 12, and the first transmission roller group 12 is used to drive the first conveyor belt 11 to operate, and the first conveyor belt 11 forms a first transmission surface for carrying a fiber web above the first frame 10, and the first height adjustment roller 13 is used to contact the first transmission surface of the first conveyor belt 11, so as to adjust the distance between the first transmission surface of the first conveyor belt 11 and the upper conveyor belt 21.

[0020] A first anti-bonding spinning unit 40 is disposed above the starting end of the first frame 10, and the first anti-bonding spinning unit 40 is used to lay fibers on the first frame 10. An upper anti-bonding spinning unit 50 is disposed above the starting end of each upper frame 20, and the upper anti-bonding spinning unit 50 is used to lay fibers on the corresponding upper frame 20. The anti-bonding spinning unit is used to melt the fiber raw material into filaments and spray them onto the first frame 10 and the upper frame 20, thereby forming a fiber web. The first height adjustment roller 13 is disposed corresponding to at least one upper frame 20, and the first height adjustment roller 13 and the upper frame 20 can also be disposed one by one.

[0021] Specifically, the upper conveyor belt 21 is connected end to end in a circle for cyclic rotation. If the upper conveyor belt 21 rotates clockwise, the starting end is on the left side of the upper frame 20 and the ending end is on the right side of the upper frame 20. If the upper conveyor belt 21 rotates counterclockwise, the starting end is on the right side of the upper frame 20 and the ending end is on the left side of the upper frame 20. The first conveyor belt 11 is connected end to end in a circle for cyclic rotation. If the first conveyor belt 11 rotates clockwise, the starting end is on the left side of the first frame 10 and the ending end is on the right side of the first frame 10. If the first conveyor belt 11 rotates counterclockwise, the starting end is on the right side of the first frame 10 and the ending end is on the left side of the first frame 10.

[0022] Embodiment 1:

[0023] It also includes an upper tensioning roller 23, which is fixed at the end of the upper frame 20. The upper tensioning roller 23 and the upper conveyor belt 21 at the end of the upper frame 20 are in conflict. The upper conveyor belt 21 is separated by the upper tensioning roller 23 at the end of the upper frame 20 to form an upper inclined surface 211 located above the upper tensioning roller 23, and a lower inclined surface 212 located below the upper tensioning roller 23.

[0024] The upper conveyor belt 21 is formed with an upper conveying surface above the upper frame 20, and an upper bottom surface is formed below the upper frame 20. Because the fiber web is very thin, in general, the fiber web will be adsorbed on the end of the upper conveyor belt 21 and then pulled away when it reaches the upper bottom surface, and finally fall on the first conveying surface of the first conveyor belt 11. Of course, an external fan can also be used to assist in achieving this effect. The fan disclosed in the equipment for online continuous production of spunbond / meltblown composite nonwoven fabrics with reference to announcement number 202181426U is not provided in this application. The turning angle from the end of the existing upper conveyor belt 21 to the upper bottom surface is too large, resulting in a large vertical speed when the fiber web is pulled away, which also makes the angle between the fiber web and the horizontal direction too large. In this way, wrinkles and unevenness may occur when the fiber web falls on the first conveying surface of the first conveyor belt 11, which is not conducive to the overlapping of the fiber web.

[0025] Embodiment 2:

[0026] The upper tension roller 23 and the tension member 30 are also included. The upper tension roller 23 is fixed to the end of the upper frame 20 through the tension member 30. The upper tension roller 23 and the upper conveyor belt 21 at the end of the upper frame 20 are in contact with each other. The tension member 30 controls the tension of the upper conveyor belt 21 by adjusting the position of the upper tension roller 23. In this embodiment, the upper tension roller 23 can move under the control of the tension member 30. Compared with the first embodiment, it has the function of adjusting the tension of the upper conveyor belt 21, achieving dual functions and saving parts.

[0027] The tensioning member 30 can adjust the position of the upper tensioning roller 23 in the horizontal direction or in the vertical direction. The horizontal direction and the vertical direction refer to the horizontal direction and the vertical direction of the upper frame 20 after it is correctly placed in reality, not the direction shown in the drawings. Figure 1-Figure 3 Rotating right by ninety degrees is the placement direction of the device in reality. Specifically, the upper tension roller 23 is located on the inner side of the upper conveyor belt 21.

[0028] The tensioning member 30 includes a connecting rod 31 and a fixed plate 32. The fixed plate 32 is fixed to the end of the upper frame 20. One end of the connecting rod 31 is adjustably connected to the fixed plate 32, and the other end is connected to the upper tensioning roller 23 for adjusting the distance between the upper tensioning roller 23 and the fixed plate 32.

[0029] Specifically, the fixing plate 32 is provided with a hole for the connecting rod 31 to pass through in the horizontal direction. The connecting rod 31 has a thread. The position of the connecting rod 31 and the fixing plate 32 is controlled by a nut. The position of the upper tensioning roller 23 in the horizontal direction is adjusted by adjusting the nut, which plays a tensioning role and can also change the inclination of the lower inclined surface 212 to a certain extent. The fixing plate 32 is fixed at different heights of the end surface of the upper frame 20 by bolts and nuts. The end of the upper frame 20 is provided with a number of fixing holes of different heights, so that the fixing plate 32 can be fixed at any height of the end of the upper frame 20. In this way, the height of the upper tensioning roller 23 can be adjusted manually. The worker adjusts the height of the upper tensioning roller 23 according to the material and weight of different limit nets and based on experience, thereby greatly changing the inclination of the lower inclined surface 212. Generally, the height of the fixing plate 32 is not changed after being fixed, and the horizontal position of the upper tensioning roller 23 is usually only adjusted by the connecting rod 31.

[0030] In the first embodiment, the upper tensioning roller 23 is fixedly arranged at the end of the upper frame 20, is immovable, and has no tensioning effect, or in the second embodiment, the upper tensioning roller 23 is movable and has a tensioning effect. The upper tensioning roller 23 of the first and second embodiments can separate the upper conveyor belt 21 into an upper inclined surface 211 and a lower inclined surface 212. The lower inclined surface 212 is connected to the upper bottom surface. After the fiber web is formed on the upper conveyor surface, it passes through the upper inclined surface 211 and the lower inclined surface 212 in sequence, and usually falls off when it reaches the upper bottom surface, thereby falling onto the first conveyor surface of the first conveyor belt 11. The setting of the lower inclined surface 212 makes the turning angle of the fiber web from the lower inclined surface 212 to the upper bottom surface smaller, so that the speed of the fiber web in the vertical direction becomes smaller, and the angle with the horizontal direction also becomes smaller, so that the fiber web is more flat after falling onto the first conveyor surface of the first conveyor belt 11, and it is not easy to wrinkle.

[0031] The angle between the lower slope 212 and the horizontal direction is greater than zero and less than 45 degrees. This arrangement allows the maximum angle at which the fiber web falls onto the first conveying surface of the first conveyor belt 11 to be 45 degrees, greatly reducing the angle between the fiber web and the horizontal direction.

[0032] The angle between the upper inclined surface 211 and the lower inclined surface 212 is greater than or equal to 40 degrees and less than or equal to 120 degrees. The upper inclined surface 211 is used to reduce the speed of the fiber web in the horizontal direction and guide the fiber web to slowly reach the lower inclined surface 212. The angle between the upper inclined surface 211 and the lower inclined surface 212 is determined by the position of the upper tensioning roller 23 and the rollers on both sides thereof. The smaller this angle is, the greater the turning angle of the fiber web is, and the greater the centrifugal force is. In order to allow the fiber web to transition from the upper inclined surface 211 to the lower inclined surface 212 more stably, the angle between the upper inclined surface 211 and the lower inclined surface 212 is optimal within the above range.

[0033] Embodiment three:

[0034] like Figure 5 As shown, the upper conveyor belt 21 forms an upper bottom surface below the upper frame 20, and the first height-adjusting roller 13 is located in the orthographic projection interval formed by the upper bottom surface in the horizontal direction.

[0035] The first height-adjusting roller 13 is located within a quarter of the orthographic projection interval near the end of the upper frame 20. The orthographic projection interval is the orthographic projection interval formed by the first height-adjusting roller 13 in the horizontal direction corresponding to the upper bottom surface of the upper frame 20, and the end of the upper frame 20 is also the end direction of the first height-adjusting roller 13 corresponding to the upper frame. The fiber web generally falls within a quarter of the displacement distance of the upper bottom surface of the upper frame 20, so the first height-adjusting roller 13 is arranged within this distance range to facilitate adjusting the height between the first conveyor belt 11 and the fiber web landing point, so as to achieve a suitable height and allow the fiber web to fall more smoothly.

[0036] Embodiment 4:

[0037] The upper conveyor belt 21 forms an upper bottom surface below the upper frame 20, and the first height adjustment roller 13 is located directly below the connection between the upper bottom surface and the lower inclined surface 212. The fiber web is generally pulled away at the upper bottom surface, and the third embodiment is the preferred solution, and the fourth embodiment is the second best.

[0038] Embodiment five:

[0039] like Figure 6 As shown, the first height-adjusting roller 13 is located within the projection interval of the horizontal projection of the lower inclined surface 212. Because the present application does not have a structure for controlling the fiber web separation, the fiber web separation is related to the speed of the upper conveyor belt 21, the fiber web thickness, the angle of the lower inclined surface 212, the air permeability of the upper conveyor belt 21, the number of conductive fibers in the upper conveyor belt 21, and the humidity of the weather. If the fiber web is still separated from the lower inclined surface 212 after the equipment is debugged, the position of the first height-adjusting roller 13 adopts the position described in Example 5.

[0040] Further, the first height adjustment roller 13 is located between the center line of the projection interval and the end of the projection interval away from the upper tension roller 23. This distance is close to the landing point of the upper fiber web, which is conducive to adjusting the height between the landing point and the first conveyor belt 11.

[0041] It is also unpredictable from what height the upper fiber web falls to the first conveyor belt 11 without wrinkles, therefore, after the upper frame 20 is debugged, the first conveyor belt 11 needs to be height-adjusted to debug the most suitable height. The landing point of the upper fiber web is generally at the bottom surface of the upper layer, but because the landing point is related to many factors, the final landing point is always unpredictable and needs to be known after debugging and starting the equipment, so three solutions are provided, namely, Embodiment 3, Embodiment 4 and Embodiment 5.

[0042] like Figure 5 and Figure 6 As shown, when the first height-adjusting roller 13 contacts the first conveying surface of the first conveyor belt 11, the first conveying surface of the first conveyor belt 11 forms an upslope 111 and a downslope 112, and the downslope 112 is used to receive the fiber web removed from the upper conveyor belt 21. Although the above mentioned drop point of the fiber web is related to many factors, in general, the fiber web can be controlled to fall on the upper bottom surface, and the drop point of the same batch of fiber webs is basically fixed. Therefore, the horizontal distance of the first height-adjusting roller 13 is generally fixed. It is only necessary to adjust the first height-adjusting roller 13 in the height direction, and the fiber web can generally be controlled to fall on the downslope 112. If an extreme situation occurs, the position of the first height-adjusting roller 13 in the fourth and fifth embodiments is adopted.

[0043] The first height-adjusting roller 13 is used to form an upslope 111 and a downslope 112 on the first conveying surface of the first conveyor belt 11, so that the downslope 112 has the same inclination direction as the downslope 212. The slope is not required to be the same. In addition to being able to adjust the distance between the downslope 212 and the first conveyor belt 11, the angle between the downslope 112 and the downslope 212 is smaller than the angle between the downslope 212 and the horizontal direction, so that the fiber web has a smaller turning angle when it falls on the downslope 112 than when it falls on the horizontal direction, which makes it less likely to produce wrinkles and makes the overlapping fiber webs more flat. Figure 5 The middle dashed line is the horizontal line.

[0044] Specifically, height adjustment members 14 are provided on both sides of the first height adjustment roller 13, and the height adjustment members 14 are used to control the first height adjustment roller 13 to move in the height direction, so as to adjust the distance between the first conveyor belt 11 and the upper conveyor belt 21. Specifically, the first height adjustment roller 13 is located on the inner side of the first conveying surface of the first conveyor belt 11. The height adjustment members 14 are connected to both ends of the first height adjustment roller 13, and the height adjustment members 14 are used to drive the first height adjustment roller 13 to move in the height direction. The height adjustment member 14 can be a retractable accessory such as a cylinder, a telescopic rod, and then directly connected to the first height adjustment roller 13 to adjust the height, or the height adjustment member 14 is a cylinder, a telescopic member, a motor connected to the first height adjustment roller 13 through an intermediate member to adjust the height, and the intermediate member is any accessory that can cooperate with the height adjustment member 14 to move, such as a slide rail, a lifting screw rod, a lever structure, etc. The height adjustment member 14 can also be a structure without power devices such as a slide rail, a lifting screw rod, a lever structure, and a bolt fixing height, and is adjusted manually. Any method of controlling the movement of the first height-adjusting roller 13 should be within the scope of protection of this application. This application arranges an upper frame 20 on the first frame 10 to transfer the single-layer fiber web on the upper conveyor belt 21 to the first conveyor belt 11, thereby stacking and forming a multi-layer non-woven fabric. The first height-adjusting roller 13 on the first frame 10 can adjust the distance between the first conveyor belt 11 and the upper conveyor belt 21, thereby adapting to fiber webs of different components and allowing them to be transferred better.

[0045] The upper transmission roller group 22 includes an upper active roller 221, an upper deflection correction roller 222 and an upper support roller 223. The upper support roller 223 is arranged on the inner side of the upper conveyor belt 21, and is used to open the upper conveyor belt 21; the upper active roller 221 is in contact with the upper conveyor belt 21, and is used to drive the upper conveyor belt 21 to transport; the upper deflection correction roller 222 is in contact with the upper conveyor belt 21, and is used to guide the upper conveyor belt 21 to transport in the middle of the upper deflection correction roller 222.

[0046] Specifically, the upper active roller 221 is arranged on the inner side of the upper conveyor belt 21 and contacts the upper conveyor belt 21 . The upper active roller 221 is driven by a motor to roll, thereby driving the upper conveyor belt 21 to move.

[0047] Specifically, the upper deflection correction roller 222 is arranged on the inner side of the upper conveyor belt 21 and contacts the upper conveyor belt 21, and is arranged adjacent to the upper active roller 221. The upper deflection correction roller 222 has a structure that is thick in the middle and thin on both sides, and is used to automatically correct the offset of the upper conveyor belt 21, so that the degree of deviation of the upper conveyor belt 21 is controlled within a limited range under high-speed operation conditions, thereby protecting the upper conveyor belt 21 from being damaged.

[0048] Specifically, there are at least two upper support rollers 223, one of which is disposed on the inner side of both ends above the upper conveyor belt 21, for supporting the upper conveyor belt 21 to form an upper conveying surface. Upper support rollers 223 can also be disposed on the inner side of the upper conveying surface or other places that need to be supported.

[0049] The first transmission roller group 12 includes a first tensioning roller 121, a first active roller 122, a first deflection correcting roller 123 and a plurality of first supporting rollers 124. Each of the first supporting rollers 124 is in contact with the first conveyor belt 11 to stretch the first conveyor belt 11; the first active roller 122 is in contact with the first conveyor belt 11 to drive the first conveyor belt 11 to be transported; the first deflection correcting roller 123 is in contact with the first conveyor belt 11 to guide the first conveyor belt 11 to be transported in the middle of the first deflection correcting roller 123; the first tensioning roller 121 is in contact with the first conveyor belt 11 to adjust the tension of the first conveyor belt 11.

[0050] Specifically, each first supporting roller 124 is disposed on the inner side of the first conveyor belt 11 .

[0051] Specifically, the first active roller 122 is driven by a motor to roll, thereby driving the first conveyor belt 11 to move.

[0052] Specifically, the first deviation-correcting roller 123 is used to automatically correct the deviation of the first conveyor belt 11, so that the deviation degree of the first conveyor belt 11 is controlled within a limited range under high-speed operation conditions, thereby protecting the first conveyor belt 11 from being damaged. The first deflection-correcting roller 123 is arranged adjacent to the first active roller 122, that is, it is located in front of or behind the first active roller 122, preferably at the rear, wherein the direction in which the first active roller 122 drives the first conveyor belt 11 to move is forward, and the first deflection-correcting roller 123 also squeezes the first conveyor belt 11 toward the inner side of the first conveyor belt 11. Specifically, the angle between the first conveyor belt 11 between the first active roller 122 and the first deflection-correcting roller 123 and the first conveyor belt 11 on the side of the first active roller 122 away from the first deflection-correcting roller 123 is an acute angle, and the angle between the first conveyor belt 11 between the first active roller 122 and the first deflection-correcting roller 123 and the first conveyor belt 11 on the side of the first deflection-correcting roller 123 away from the first active roller 122 is an acute angle, thereby making the contact area between the first conveyor belt 11 and the first active roller 122 larger, and also making the contact area between the first conveyor belt 11 and the first deflection-correcting roller 123 larger.

[0053] Specifically, the first tensioning roller 121 is located on the outside below the first conveyor belt 11 and can rise or fall. Both ends of the first tensioning roller 121 are provided with retractable lifting parts, which are used to drive the first height adjustment roller 13 to move in the height direction. The lifting parts are any accessories that can control translation, such as cylinders, slide rails or lifting screws. The lifting parts are the same as the height adjustment parts 14, but are not shown in the drawings. The lifting parts can automatically adjust the tension of the first conveyor belt 11 to maintain it within a stable range of values. Preferably, there are two first support rollers 124 located on both sides of the first tensioning roller 121. The first tensioning roller 121 is used to move toward the inside of the first conveyor belt 11 to tighten the first conveyor belt 11, or to move toward the outside of the first conveyor belt 11 to loosen the first conveyor belt 11. Because the first conveyor belt 11 is longer, the first tensioning roller 121 is arranged on the outside of the first conveyor belt 11 and tightened inwardly. The first support rollers 124 on both sides of the first tensioning roller 121 are as close to the first tensioning roller 121 as possible. Preferably, the first tensioning roller 121 is tangent to the first support rollers 124 on both sides in the vertical direction, so that the moving distance of the first tensioning roller 121 can produce an effect of twice the tightening distance on the first conveyor belt 11.

[0054] When in use, select a first conveyor belt 11 of appropriate length, first control the upper tensioning roller 23 to tension the upper conveyor belt 21, so that the angle between the upper inclined surface 211 and the lower inclined surface 212 is greater than or equal to forty degrees and less than or equal to one hundred and twenty degrees, and the angle between the lower inclined surface 212 and the horizontal direction is greater than zero degrees and less than forty-five degrees; then control the first conveying surface of the first conveyor belt 11 to rise by the first height adjustment roller 13, so that the upper tensioning roller 23 and the first conveying surface of the first conveyor belt 11 reach the required height; finally, tension the first conveyor belt 11 by the first tensioning roller 121.

[0055] The wall panels on both sides of the upper frame 20 are connected in parallel with the wall panels on both sides of the first frame 10 , and the end of the upper frame 20 faces the starting end of the first frame 10 .

[0056] The transport direction of the upper rack 20 is parallel to that of the first rack 10, but in opposite directions, so that the fiber web dropped from the upper rack 20 can be transported for another distance on the first rack 10 without increasing the length of the first rack 10, and the two layers of fiber web can be attached to each other for a certain period of time during this transport distance, without causing the multi-layer fiber web to be easily delaminated.

[0057] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A multi-layer non-woven fabric production device with an adjustable conveyor belt, characterized in that: It comprises a first frame (10), wherein at least one upper frame (20) is arranged above the first frame (10); An upper transmission roller group (22) is arranged on the upper frame (20), an upper conveyor belt (21) is arranged on the upper transmission roller group (22), and the upper transmission roller group (22) is used to drive the upper conveyor belt (21) to operate; The first frame (10) is provided with a first transmission roller group (12) and a first height-adjusting roller (13); the first transmission roller group (12) is provided with a first conveyor belt (11); the first transmission roller group (12) is used to drive the first conveyor belt (11) to operate; the first conveyor belt (11) forms a first conveying surface for carrying a fiber web above the first frame (10); the first height-adjusting roller (13) is used to contact the first conveying surface of the first conveyor belt (11), thereby adjusting the distance between the first conveying surface of the first conveyor belt (11) and the upper conveyor belt (21); The upper conveyor belt (21) forms an upper bottom surface below the upper frame (20), and the first height adjustment roller (13) is located within the orthographic projection interval formed by the upper bottom surface in the horizontal direction; It also includes an upper tension roller (23), the upper tension roller (23) is fixed at the end of the upper frame (20), the upper tension roller (23) and the upper conveyor belt (21) at the end of the upper frame (20) are in contact, and the upper conveyor belt (21) is separated by the upper tension roller (23) at the end of the upper frame (20) to form an upper inclined surface (211) located above the upper tension roller (23) and a lower inclined surface (212) located below the upper tension roller (23); The lower inclined surface (212) is connected to the bottom surface of the upper layer; The first height adjustment roller (13) is located within a quarter of the orthographic projection interval close to the end of the upper frame (20); When the first height-adjusting roller (13) contacts the first conveying surface of the first conveyor belt (11), the first conveying surface of the first conveyor belt (11) forms an upward slope (111) and a downward slope (112), and the downward slope (112) is used to receive the fiber web removed from the upper conveyor belt (21).

2. The multi-layer non-woven fabric production equipment with an adjustable conveyor belt according to claim 1, characterized in that: The angle between the lower slope (212) and the horizontal direction is greater than zero degrees and less than forty-five degrees.

3. The multi-layer non-woven fabric production equipment with an adjustable conveyor belt according to claim 1, characterized in that: The included angle between the upper inclined surface (211) and the lower inclined surface (212) is greater than or equal to 40 degrees and less than or equal to 120 degrees.

4. The multi-layer non-woven fabric production equipment with an adjustable conveyor belt according to claim 1, characterized in that: Height adjusting members (14) are provided on both sides of the first height adjusting roller (13), and the height adjusting members (14) are used to control the movement of the first height adjusting roller (13), thereby adjusting the distance between the first conveyor belt (11) and the upper conveyor belt (21).

5. A multi-layer non-woven fabric production device with an adjustable conveyor belt according to any one of claims 1 to 4, characterized in that: It also includes a tensioning member (30), wherein the upper tensioning roller (23) is fixed to the end of the upper frame (20) through the tensioning member (30), the upper tensioning roller (23) and the upper conveyor belt (21) at the end of the upper frame (20) are in contact with each other, and the tensioning member (30) controls the tensioning degree of the upper conveyor belt (21) by adjusting the position of the upper tensioning roller (23).

6. The multi-layer non-woven fabric production equipment with an adjustable conveyor belt according to claim 5, characterized in that: The tensioning member (30) comprises a connecting rod (31) and a fixed disk (32), wherein the fixed disk (32) is fixed to the end of the upper frame (20), one end of the connecting rod (31) is adjustably connected to the fixed disk (32), and the other end is connected to the upper tensioning roller (23) for adjusting the distance between the upper tensioning roller (23) and the fixed disk (32).

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