Automatic rolling equipment for double-feeding fire-retardant element

Abstract

The utility model is suitable for the technical field of fire-retardant element production equipment, and provides double-feeding fire-retardant element automatic rolling equipment which comprises two feeding modules, a wave band forming module, a wave band storage buffering module, a man-machine control module and a fire-retardant element rolling module. Wherein one is provided with a flat belt material roll, the other one is provided with a wave belt material roll, and the rotating torsion values of material storage discs of the flat belt material roll and the wave belt material roll are respectively controlled through a tensioner, so that the flat belt and the wave belt can be kept in a collapsed straight state in the conveying process; meanwhile, the wave strip pressed by the wave strip forming module is firstly stored in the wave strip storage buffer module, and the fire-retardant element winding module pulls the wave strip from the wave strip storage buffer module to wind the fire-retardant element, so that the problem of imbalance between the discharging speed of the wave strip forming module and the receiving speed of the fire-retardant element winding module can be avoided.

Description

Technical Field

[0001] The utility model is applicable to the technical field of fire-blocking element production equipment and provides a double-feed fire-blocking element automatic rolling equipment. Background Art

[0002] The fire-blocking element is a key component of the flame arrester product. It is made of a layer of flat steel strip and a layer of corrugated steel strip alternately rolled. The size, uniformity and tightness of the corrugated steel strip with the flat steel strip have an important impact on the quality of the fire-blocking element. The existing fire-blocking element winding machine has a relatively simple function and has the following problems: 1. There is a lack of accurate feed tension control device. Since the corrugated steel strip needs to be corrugated before being overlapped with the flat steel strip to form the fire-blocking element strip, and it is obvious that the corrugated steel strip needs more feeders to supply more strips at the same length, the traditional equipment can only rely on manual adjustment of the feed speed according to experience to meet the supply requirements of the corrugated steel strip and the flat steel strip at the same time. , this method has low accuracy and cannot be adjusted in time during the processing. During long-term processing, it is easy to produce unbalanced feed supply, resulting in a loose structure of the fire-blocking element; 2. Since the corrugated steel strip needs to be corrugated before being superimposed on the flat steel strip, the feeding speed of the corrugated steel strip is affected by the pressing speed of the corrugation pressing device, so it is difficult to keep it consistent with the winding speed of the fire-blocking element winding module. Too fast a feeding speed will cause excessive feeding of the corrugated strip, which will cause the structure of the fire-blocking element to be loose, while too slow a feeding speed will cause insufficient feeding of the corrugated strip. The fire-blocking element will stretch the corrugated strip during the rolling process, which will also cause uneven wave height of the corrugated strip. Utility Model Content

[0003] To this end, the utility model provides a double-feed fire-blocking element automatic winding device, which controls the rotation torque value of the storage disks of the flat belt material roll and the wave belt material roll respectively through a tensioner to ensure that the flat belt strip and the wave belt strip can remain in a straight state during the conveying process, and at the same time, a wave belt storage buffer module is arranged between the wave belt forming module and the fire-blocking element winding module, and the wave belt strip pressed out by the wave belt forming module is stored in the wave belt storage buffer module, and the fire-blocking element winding module pulls the wave belt strip from the wave belt storage buffer module to wind the fire-blocking element, so as to avoid the imbalance problem between the discharge speed of the wave belt forming module and the receiving speed of the fire-blocking element winding module.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-feed fire-blocking element automatic rolling device, including a device machine for installing each module, and the device machine is provided with:

[0005] Two feeding modules, each of which includes a storage tray rotatably arranged on the equipment platform, wherein the storage tray of one feeding module is provided with a flat belt roll, and the storage tray of the other feeding module is provided with a wave belt roll;

[0006] The wave belt forming module comprises an active pressing gear, a driven pressing gear and an active gear driving device for driving the active pressing gear to rotate, wherein the active pressing gear is meshed and connected with the driven pressing gear;

[0007] The wave belt material storage buffer module comprises a material storage guide rail and a plurality of fixed guide wheels, wherein the material storage guide rail is slidably provided with a sliding base, the aforementioned sliding base is fixedly provided with a plurality of sliding guide wheels, at least two displacement sensors are fixedly provided on one side of the material storage guide rail along the sliding direction of the sliding base, and a base counterweight is fixedly connected to the side of the sliding base away from the fixed guide wheel;

[0008] The fire-blocking element winding module comprises an automatic winding disk rotatably arranged on the equipment platform and a winding disk driving device driving the automatic winding disk to rotate, the automatic winding disk is fixedly provided with a material roll fixing shaft, the wave strips of the wave strip material roll are sequentially passed through the wave strip forming module and the wave strip material storage buffer module, and then overlapped with the flat strip strips of the flat strip material roll to form a fire-blocking element material strip, and the fire-blocking element material strip is finally wound onto the material roll fixing shaft;

[0009] The human-machine control module is used to input control instructions and control the above modules.

[0010] Furthermore, a fire-blocking element size measuring module is also provided on one side of the fire-blocking element winding module, and the fire-blocking element size measuring module includes a measuring machine base and a grating ruler, the measuring machine base is fixedly provided with a base guide rail, the base guide rail is slidably provided with a limit measurement base, the limit measurement base is provided with a fire-blocking element material roll limit wheel, the grating ruler includes a scale grating and a grating reading head adapted to the scale grating, the scale grating is arranged along the sliding direction of the limit measurement base, and the grating reading head is fixedly connected to the limit measurement base.

[0011] Furthermore, the limit measurement base is provided with a brake for changing the sliding resistance of the limit measurement base.

[0012] Furthermore, the feeding module also includes an expansion sleeve assembly, a tray fixing shaft and a tensioner, the expansion sleeve assembly includes several arc-shaped tensioning blocks, a tensioning driving sleeve and a rotating fastening block arranged in a circular array, the two adjacent arc-shaped tensioning blocks are elastically connected by a spring, one end of the tray fixing shaft is fixedly connected to the output end of the tensioner, the rotating fastening block and the tensioning driving sleeve are sequentially sleeved on the tray fixing shaft from top to bottom, the tensioning driving sleeve is slidingly connected to the tray fixing shaft, the rotating fastening block is threadedly connected to the tray fixing shaft, and the tensioning driving sleeve abuts against the inner side wall of the arc-shaped tensioning block.

[0013] Furthermore, the equipment machine is provided with a plurality of material belt guide wheels, and the wavy belt strip and the flat belt strip are sequentially wound around and passed through the plurality of material belt guide wheels on the conveying path.

[0014] Furthermore, the equipment is provided with a plurality of broken belt detectors, and the broken belt detectors are arranged facing the wave belt strip or the flat belt strip.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. In the scheme of the utility model, the rotation torque value of the storage tray of the flat belt roll and the corrugated belt roll is controlled by the tensioner respectively. When the thickness change of the roll affects the tightness of the flat belt roll and the corrugated belt roll during the conveying process, the rotation torque value of the storage tray is changed by the tensioner to keep the flat belt roll and the corrugated belt roll straight, so as to avoid the problem of loose structure of the finished product of the fire-blocking element;

[0017] 2. When designing the rolling equipment, the discharge speed of the wave strip forming module is adjusted to be greater than the winding speed of the fire-blocking element winding module. The wave strip is first stored in the wave strip storage buffer module. When the wave strip passes through the wave strip storage buffer module, it is wound in sequence between a plurality of fixed guide wheels and sliding guide wheels. In this way, the wave strip is stored between a plurality of fixed guide wheels and sliding guide wheels. As the wave strip is fed, the distance between the sliding guide wheel and the fixed guide wheel gradually increases under the action of the base counterweight block. However, the wave strip stored in the wave strip is The strip can always remain in a straight state, and when the stored wave strip reaches a specified length, the wave strip forming module can stop discharging, and when the stored wave strip is consumed to a specified length by the fire-blocking element winding module, the wave strip forming module can be started to discharge again, thereby avoiding the problem of inconsistent discharge speed of the wave strip forming module and winding speed of the fire-blocking element winding module, thereby ensuring that the wave strip feed at the fire-blocking element winding module always remains in a straight state, avoiding the problem of uneven wave height and loose structure of the final fire-blocking element finished wave strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an automatic rolling device for double-feed fire-blocking elements mentioned in the utility model;

[0019] Figure 2 It is a structural schematic diagram of the feeding module mentioned in the utility model;

[0020] Figure 3 for Figure 2 Structural cross-sectional view of the middle feed module;

[0021] Figure 4 It is a structural schematic diagram of the fire-blocking element size measurement module mentioned in the utility model;

[0022] Figure 5 It is a structural schematic diagram of the wave band storage buffer module mentioned in the utility model when the wave band strip storage capacity reaches the maximum;

[0023] Figure 6 It is a structural schematic diagram of the wave band storage buffer module mentioned in the present invention when it reaches the minimum wave band strip storage capacity.

[0024] In the figure: 1. Equipment machine, 2. Feeding module, 201. Storage tray, 202. Tensioner, 203. Tray fixing shaft, 204. Arc tensioning block, 205. Spring, 206. Tensioning drive sleeve, 207. Rotating fastening block, 3. Flat belt roll, 301. Flat belt strip, 4. Wave belt roll, 401. Wave belt strip, 5. Wave belt forming module, 6. Wave belt storage buffer module, 601. Storage guide rail, 602. Sliding base, 603. Sliding guide Wheel, 604, base counterweight, 605, displacement sensor, 606, fixed guide wheel, 7, material strip guide wheel, 8, fire-blocking element winding module, 9, fire-blocking element size measuring module, 901, measuring machine base, 902, base guide rail, 903, limit measuring base, 904, ruler grating, 905, grating reading head, 906, fire-blocking element material roll limit wheel, 10, fire-blocking element finished material roll, 11, human-machine control module, 12, broken belt detector. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] For example, see the attached Figure 1 The utility model provides a double-feed fire-blocking element automatic rolling device, comprising an equipment platform 1 for installing each module, on which two feeding modules 2, a wave band forming module 5, a wave band storage buffer module 6, a fire-blocking element size measuring module 9 and a human-machine control module 11 are arranged;

[0027] As attached Figure 2 ~Attached Figure 3As shown, the two feeding modules 2 correspond to the feeding of the flat belt and the wave belt in the finished fire-blocking element, respectively. Each feeding module 2 includes a storage tray 201, an expansion sleeve assembly, a tray fixing shaft 203 and a tensioner 202. The storage tray 201 of one feeding module 2 is provided with a flat belt roll 3, and the storage tray 201 of the other feeding module 2 is provided with a wave belt roll 4. The flat belt roll 3 and the wave belt roll 4 are both rolls with a circular cavity in the middle. The expansion sleeve assembly includes a plurality of arc-shaped tensioning blocks 204 arranged in a ring array, a tensioning drive pressing sleeve 206 and a rotating fastening block 207. When the material coil is installed on the material storage tray 201, the arc-shaped tensioning blocks 204 are all arranged in the circular cavity of the material coil, and the adjacent arc-shaped tensioning blocks 204 are elastically connected by springs 205. The rotating fastening block 207 and the tensioning driving pressing sleeve 206 are sequentially sleeved on the material tray fixed shaft 203 from top to bottom. The tensioning driving pressing sleeve 206 is slidably connected to the material tray fixed shaft 203, and the rotating fastening block 207 is threadedly connected to the material tray fixed shaft 203. The tensioning driving pressing sleeve 206 abuts against the inner side wall of the arc-shaped tensioning block 204. The tensioning driving pressing sleeve 206 is provided with a conical columnar When the tension driving sleeve 206 moves downward under the drive of the rotating fastening block 207, the conical columnar driving block will push the arc tensioning block 204 outward, so that the arc tensioning block 204 can be close to the inner wall of the material roll, and the flat belt material roll 3 and the wave belt material roll 4 can be fixed to the two storage trays 201 respectively through the outward expansion of multiple arc tensioning blocks 204. When the expansion sleeve assembly needs to be unloaded, the fastening block 207 is rotated upward. At this time, the tension driving sleeve 206 is not subjected to force, and the arc tensioning block 204 moves inward under the action of the spring 205. Recycling, at this time, the arc-shaped tensioning block 204 is separated from the material coil, and the material coil can be unloaded from the expansion sleeve assembly, and one end of the material tray fixed shaft 203 is fixedly connected to the output end of the tensioner 202. The tensioner 202 belongs to the prior art, and the rotational torque of the output shaft of the tensioner 202 can be changed by using an electromagnetic device or other braking methods. In this embodiment, the rotational resistance of the flat belt material coil 3 and the wave belt material coil 4 on the storage tray 201 can be accurately changed by the tensioner 202, so that the flat belt material coil 3 and the wave belt material coil 4 can always remain in a straight state during the conveying process;

[0028] The wave strip forming module 5 includes an active pressing gear, a driven pressing gear, and an active gear driving device for driving the active pressing gear to rotate. The active pressing gear is meshed with the driven pressing gear. When the wave strip 401 passes between the active pressing gear and the driven pressing gear, it is deformed under the rotation and pressing of the two gears, and finally changes from a smooth metal strip to a corrugated metal strip.

[0029] As attached Figure 5 ~Attached Figure 6As shown, the wave band storage buffer module 6 includes a storage guide rail 601 and several fixed guide wheels 606, the storage guide rail 601 is slidably provided with a sliding base 602, the aforementioned sliding base 602 is fixedly provided with several sliding guide wheels 603, at least two displacement sensors 605 are fixedly provided on one side of the storage guide rail 601 along the sliding direction of the sliding base 602, and the sliding base 602 is fixedly connected with a base counterweight block 604 on the side away from the fixed guide wheel 606, and the wave band strip 401 discharged from the wave band forming module 5 is wound around all the fixed guide wheels 606 and the sliding guide wheels 603 in an alternating manner, so that the wave band strip 401 pressed out of the wave band forming module 5 will first be stored between multiple groups of fixed guide wheels 606 and sliding guide wheels 603, and a pulling force in a direction away from the fixed guide wheels 606 will be applied to the sliding base 602 through the base counterweight block 604, so that the wave band strip 401 discharged from the wave band forming module 5 will be stored between multiple groups of fixed guide wheels 606 and sliding guide wheels The wave strip 401 between 603 is always in a straight state, and the fire-blocking element winding module 8 pulls the wave strip 401 from the wave strip storage buffer module 6 through the rotation of the automatic winding disk to wind the fire-blocking element. In the actual application process of this embodiment, the winding speed of the automatic winding disk is slower than the discharge speed of the wave strip forming module 5. Therefore, in the actual production project, when the wave strip forming module 5 discharges, the wave strip 401 will be stored between multiple groups of fixed guide wheels 606 and sliding guide wheels 603. Under the action of the base counterweight block 604, the distance between the sliding base 602 and the fixed guide wheel 606 gradually increases. When designing, the maximum distance and the minimum distance between the sliding base 602 and the fixed guide wheel 606 are first set respectively, and then two displacement sensors 605 are respectively set at the two extreme positions of the maximum distance and the minimum distance for detecting the sliding base 602. In this way, when the sliding base 602 passes through these two positions respectively, it can be detected by the displacement sensor 605;

[0030] The fire-blocking element winding module 8 includes an automatic winding disk rotatably arranged on the equipment machine 1 and a winding disk driving device driving the automatic winding disk to rotate, the automatic winding disk is fixedly provided with a material roll fixing shaft, the wave strip 401 of the wave strip material roll 4 passes through the wave strip forming module 5 and the wave strip material storage buffer module 6 in turn, and then overlaps with the flat strip 301 of the flat strip material roll 3 to form a fire-blocking element material strip, and the fire-blocking element material strip is finally wound onto the material roll fixing shaft, and the material roll fixing shaft can be rotated to roll the fire-blocking element material strip into a finished fire-blocking element coil, and the flat strip 301 and The conveying path of the wave belt strip 401 is also wound around a number of material belt guide wheels 7, which can ensure that the flat belt strip 301 and the wave belt strip 401 remain in a straight state during the conveying process. At the same time, the conveying paths of the flat belt strip 301 and the wave belt strip 401 are also provided with broken belt detectors 12, which are arranged facing the wave belt strip 401 or the flat belt strip 301. The broken belt detector 12 uses a photoelectric sensing device and other structures to sense whether there is a wave belt strip 401 or a flat belt strip 301 in front of it, so as to quickly detect whether there is a broken belt problem;

[0031] The human-machine control module 11 is used to input control instructions and control the above modules. The human-machine control module 11 can control the torque value of the tensioner 202 and can also control the start and stop of the fire-blocking element winding module 8 and the wave band forming module 5.

[0032] In one embodiment of the present invention, as shown in the attached Figure 4 As shown, a fire-blocking element size measuring module 9 is also provided on one side of the fire-blocking element winding module 8, and the fire-blocking element size measuring module 9 includes a measuring machine base 901 and a grating ruler, the measuring machine base 901 is fixedly provided with a base guide rail 902, the base guide rail 902 is slidably provided with a limit measuring base 903, the limit measuring base 903 is provided with a brake for changing the sliding resistance of the limit measuring base 903, the limit measuring base 903 is provided with a fire-blocking element roll limit wheel 906, the grating ruler includes a scale grating 904 and a grating reading head 905 adapted to the scale grating 904, the scale grating 904 is arranged along the sliding direction of the limit measuring base 903, the grating reading head 905 is fixedly connected to the limit measuring base 903, and the reading of the grating ruler will be transmitted to the human-machine control module 11 for automatic control.

[0033] The working principle of this embodiment is as follows:

[0034] First, the flat belt roll 3 and the wave belt roll 4 are placed on the storage trays 201 of the two feeding modules 2 respectively, and the flat belt roll 3 and the wave belt roll 4 are fixed by the expansion sleeve assembly, and then the flat belt strip 301 is successively wound around a plurality of belt guide wheels 7 and fixed to the roll fixing shaft, and the wave belt strip 401 is first pressed into a surface corrugation by the wave belt forming module 5, and then stored between the sliding guide wheel 603 and the fixed guide wheel 606 of the wave belt storage buffer module 6, and the wave belt strip 401 is stored in the wave belt storage buffer module 6. After the module 6 comes out, it is overlapped with the flat belt strip 301 to form a fire-blocking element material strip and fixed to the material roll fixed shaft. Then, the fire-blocking element material roll limiting wheel 906 is attached to the outer side of the fire-blocking element material strip. At the same time, the grating ruler reading is adjusted to zero. At this time, the winding disk drive device starts to drive the automatic winding disk to start rotating. At this time, the material roll fixed shaft starts to rotate and reel in the flat belt strip 301 and reel in the flat belt material roll 3, while the wave belt strip 401 is reeled in from the wave belt storage buffer module 6. In the design, the fire-blocking element winding module 8 The material collection speed is lower than the material discharge speed of the wave band forming module 5, so the wave band strips 401 produced by the wave band forming module 5 are stored in the wave band material storage buffer module 6, and when the wave band material storage buffer module 6 reaches the maximum storage capacity, the displacement sensor 605 at this position senses the sliding base 602, and at this time the wave band forming module 5 is controlled to stop discharging, and then the wave band strips 401 stored in the wave band material storage buffer module 6 begin to be consumed by the fire-blocking element winding module 8, and when the wave band strips 401 are consumed to the wave band material storage buffer When the punching die group 6 reaches the minimum storage amount, the displacement sensor 605 at this position senses the sliding base 602, and at this time controls the wave band forming module 5 to restart discharging, and repeats this process until the finished fire-blocking element roll 10 is completed. The size of the finished fire-blocking element roll 10 is manually input from the human-machine control module 11, and the real-time size of the finished fire-blocking element roll 10 is read by the grating ruler. When the size of the finished fire-blocking element roll 10 reaches the set value, the winding is stopped, and the production of the finished fire-blocking element roll 10 is completed.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0036] The above are only preferred embodiments of the present invention. Any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the above technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A double-feed fire-blocking element automatic rolling device, comprising a device platform (1) for installing each module, characterized in that: The equipment platform (1) is provided with: Two feeding modules (2), each feeding module (2) comprising a material storage tray (201) rotatably arranged on the equipment platform (1), the material storage tray (201) of one feeding module (2) being provided with a flat belt material roll (3), and the material storage tray (201) of the other feeding module (2) being provided with a wave belt material roll (4); The wave band forming module (5) comprises an active pressing gear, a driven pressing gear and an active gear driving device for driving the active pressing gear to rotate, wherein the active pressing gear is meshingly connected with the driven pressing gear; The waveband material storage buffer module (6) comprises a material storage guide rail (601) and a plurality of fixed guide wheels (606); the material storage guide rail (601) is slidably provided with a sliding base (602); the sliding base (602) is fixedly provided with a plurality of sliding guide wheels (603); at least two displacement sensors (605) are fixedly provided on one side of the material storage guide rail (601) along the sliding direction of the sliding base (602); and a base counterweight block (604) is fixedly connected to the side of the sliding base (602) away from the fixed guide wheel (606); The fire-blocking element winding module (8) comprises an automatic winding disk rotatably arranged on an equipment machine (1) and a winding disk driving device for driving the automatic winding disk to rotate, wherein the automatic winding disk is fixedly provided with a material roll fixing shaft, and the wave band strip (401) of the wave band material roll (4) passes through the wave band forming module (5) and the wave band material storage buffer module (6) in sequence and then overlaps with the flat band strip (301) of the flat band material roll (3) to form a fire-blocking element material strip, and the fire-blocking element material strip is finally wound onto the material roll fixing shaft; The human-machine control module (11) is used to input control instructions and control the above modules.

2. The automatic rolling equipment for double-feed fire-blocking elements according to claim 1 is characterized in that: A fire-blocking element dimension measuring module (9) is also arranged on one side of the fire-blocking element winding module (8). The fire-blocking element dimension measuring module (9) comprises a measuring machine base (901) and a grating ruler. The measuring machine base (901) is fixedly provided with a base guide rail (902). A limit measuring base (903) is slidably provided on the base guide rail (902). The limit measuring base (903) is provided with a fire-blocking element roll limit wheel (906). The grating ruler comprises a scale grating (904) and a grating reading head (905) adapted to the scale grating (904). The scale grating (904) is arranged along the sliding direction of the limit measuring base (903). The grating reading head (905) is fixedly connected to the limit measuring base (903).

3. The automatic rolling equipment for double-feed fire-blocking elements according to claim 2 is characterized in that: The limit measurement base (903) is provided with a brake for changing the sliding resistance of the limit measurement base (903).

4. The automatic rolling equipment for double-feed fire-blocking elements according to claim 1 is characterized in that: The feeding module (2) also includes an expansion sleeve assembly, a tray fixing shaft (203) and a tensioner (202), wherein the expansion sleeve assembly includes a plurality of arc-shaped tensioning blocks (204) arranged in a circular array, a tensioning driving sleeve (206) and a rotating fastening block (207), wherein two adjacent arc-shaped tensioning blocks (204) are elastically connected via a spring (205), one end of the tray fixing shaft (203) is fixedly connected to the output end of the tensioner (202), the rotating fastening block (207) and the tensioning driving sleeve (206) are sequentially sleeved on the tray fixing shaft (203) from top to bottom, the tensioning driving sleeve (206) is slidably connected to the tray fixing shaft (203), the rotating fastening block (207) is threadedly connected to the tray fixing shaft (203), and the tensioning driving sleeve (206) abuts against the inner side wall of the arc-shaped tensioning block (204).

5. The automatic rolling equipment for double-feed fire-blocking elements according to claim 1 is characterized in that: The equipment machine (1) is provided with a plurality of material belt guide wheels (7), and the wavy belt strip (401) and the flat belt strip (301) are sequentially wound around the plurality of material belt guide wheels (7) on the conveying path.

6. The automatic rolling equipment for double-feed fire-blocking elements according to claim 1 is characterized in that: The equipment machine (1) is provided with a plurality of broken belt detectors (12), and the broken belt detectors (12) are arranged facing the wave belt strip (401) or the flat belt strip (301).

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