CN114609014A

CN114609014A - Cloth defect detection device

Info

Publication number: CN114609014A
Application number: CN202210265058.3A
Authority: CN
Inventors: 陆伟
Original assignee: Suzhou Jingsuo Intelligent Technology Co ltd
Current assignee: Suzhou Jingsuo Intelligent Technology Co ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-06-10

Abstract

The invention relates to the technical field of fiber textile production, and discloses a cloth defect detection device which comprises an installation platform, wherein a winding component is installed on the installation platform, a detection component for detecting the air permeability of cloth is also arranged on the installation platform, the detection component can also drive the cloth to continuously move when detecting the air permeability of the cloth, the detection component comprises an upper rotary drum and a rolling seat, the positions of the upper rotary drum and the positions of the rolling seat correspond to each other, and a pressure relief component is arranged on each of the rolling seat and the upper rotary drum. Compared with the cloth defect detection device in the prior art, the cloth defect detection device can complete dynamic synchronous detection in the cloth winding process, does not need cloth to be static, improves the cloth detection efficiency, and can improve the safety of the detection device in cloth detection through the pressure relief assembly.

Description

Cloth defect detection device

Technical Field

The invention relates to the technical field of fiber textile production, in particular to a cloth defect detection device.

Background

The air permeability is a physical index for representing the permeability of air in a tested sample, and is mainly used for porous materials and other materials with large air permeability, such as textiles, sponges, leather and the like. For fabric materials, the air permeability is related to the number and size of the warp and weft yarn gaps and fiber gaps in the fabric, the warp and weft density, the yarn twist, the fiber properties, the yarn structure, the fabric thickness, and other factors.

Through retrieval, for example, chinese patent document with publication number CN112067210B proposes a cloth tightness detection device based on safety detection of a sealing protective garment, which solves the problems that the currently used detection device mainly detects air permeability through wind force test, cannot detect air permeability of cloth through pressurization and depressurization, and cannot accurately measure air pressure value when the cloth is air permeable, although the detection effect is very significant, the cloth to be detected needs to be kept static when the device is actually applied, and further the overall detection efficiency of cloth defects is affected, therefore, the application discloses a cloth defect detection device to meet the continuous detection requirement of the cloth defects.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a cloth defect detection device which has the advantages of dynamic detection and the like and solves the series problems of low cloth air permeability detection efficiency and the like in the prior art.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cloth defect detecting device, includes the mount table, install the rolling subassembly that is used for pulling cloth and rolling cloth on the mount table, the rolling subassembly contains and installs respectively receive and release the roller and can drive of mount table both ends receive and release roller pivoted actuating mechanism, still be equipped with the determine module that is used for detecting cloth air permeability on the mount table, the determine module can also drive the cloth continuous movement when detecting cloth air permeability, just the determine module contains the corresponding last rotary drum in position and the seat that rolls, go up the rotary drum with set up the top groove and the kerve of multiunit looks adaptation on the seat that rolls respectively, it is a plurality of the top groove is linked together with outside air pump output, just roll the seat with all be equipped with the pressure release subassembly on the last rotary drum.

Preferably, still fixed mounting has an arc support at the top of mount table, detecting element installs on the arc support, just still rotate on the arc support and install the tensioning roller, cloth one end warp the winding is in one of them after the tensioning roller trades on the receiving and releasing roller.

Preferably, the arc-shaped support is further rotatably provided with a driven shaft, two ends of the driven shaft respectively extend out of two sides of the arc-shaped support, the rolling seat is fixedly sleeved on the driven shaft, the cross section of the rolling seat is of a regular polygonal structure, and rounded corners are arranged on the side edge of the rolling seat, which is provided with the bottom groove, and the side edge of the upper rotary drum, which is provided with the top groove.

Preferably, the arc-shaped support is further rotatably provided with a driving shaft corresponding to the driven shaft, two ends of the driving shaft respectively extend out of two sides of the arc-shaped support, two ends of the driving shaft are fixedly connected with fixing rings through a plurality of arc-shaped rods which are uniformly distributed, and one side, close to each other, of each of the two fixing rings is fixedly connected with two sides of the upper rotary drum through a plurality of horizontal connecting rods.

Preferably, the driving shaft with the one end that the driven shaft is located the homonymy is fixed the cover respectively and is connected with the corresponding first belt pulley in position and second belt pulley, it has driving motor still to fix on the mount table, driving motor's output shaft passes through shaft coupling fixedly connected with input shaft, the other end of input shaft is fixed cup jointed with the driving pulley that the second belt pulley is located the coplanar, driving pulley with first belt pulley reaches equal tensioning has same driving belt on the second belt pulley.

Preferably, the pressure relief assembly comprises sealing discs for relieving pressure of the top grooves, first pressure relief holes are formed in the side walls of the top grooves, upper sliding columns are slidably sleeved in the first pressure relief holes, the sealing discs are fixedly sleeved on the corresponding upper sliding columns, guide discs are fixedly sleeved on the upper sliding columns, and a plurality of air vents are formed in the guide discs;

it is a plurality of the one end of going up the traveller all extends to the correspondence the top groove is outer and fixed the cup joint has the fixed disk, it is equipped with first pressure release spring still to overlap on the traveller, first pressure release spring's both ends fixed connection respectively go up the lateral wall of rotary drum and correspond on the fixed disk.

Preferably, the pressure relief assembly further comprises pistons for pressure relief of the bottom grooves, second pressure relief holes corresponding to the positions of the side walls of the bottom grooves are formed in the side walls of the bottom grooves, lower sliding columns are slidably sleeved in the second pressure relief holes, and the pistons are slidably sleeved in the corresponding second pressure relief holes and fixedly connected to one ends of the corresponding lower sliding columns;

the other end of lower traveller extends to the correspondence outside the second pressure release hole and through connecting rod fixedly connected with guide bar, it is a plurality of the equal slip cap of guide bar is established on the seat that rolls, it is equipped with second pressure release spring still to overlap on the guide bar, and is a plurality of second pressure release spring's both ends difference fixed connection be in roll the seat with correspond on the connecting rod.

Preferably, a plurality of pressure gauges which are matched with the corresponding top grooves in position are fixedly installed on the inner wall of the upper rotary drum, and the input ends of the pressure gauges are respectively communicated with the corresponding top grooves.

Preferably, the interior of the driving shaft is hollow, one end of the driving shaft is in a closed state, a plurality of communicating holes are formed in the driving shaft, a communicating disc is sleeved on the driving shaft and communicated with the interior of the driving shaft through the communicating holes, the communicating disc is further communicated with the corresponding top groove through a plurality of communicating pipes, and one-way valves are arranged on the communicating pipes;

the unsealed end of the driving shaft is rotatably sleeved with a communicating sleeve and keeps relative sealing with the communicating sleeve, and the other end of the communicating sleeve is communicated with the output end of an external air pump.

Preferably, the mounting table is further provided with smoothing rollers corresponding to the position of the take-up and pay-off rollers, and the two smoothing rollers at the same relative position are used for smoothing wrinkles on the cloth.

(III) advantageous effects

Compared with the prior art, the invention provides a cloth defect detection device, which has the following beneficial effects:

1. this cloth defect detecting device, through the driving motor operation, make go up the rotary drum and roll the seat synchronous rotation, and make the top groove and the mutual interlock of kerve on the same relative position, thereby the cloth of unit area forms the relatively sealed environment on the cooperation cloth, outside air pump air feed is through communicating pipe with the intercommunication dish in with a plurality of top grooves of gas input, and the atmospheric pressure size in the top groove is reacted directly perceivedly through the manometer that corresponds, thereby the air permeability of indirect reaction cloth, compare in the detection device who mentions among the background art, can be at cloth rolling in-process, accomplish dynamic synchronous detection, it is static to need not the cloth, the detection efficiency of cloth has been improved.

2. This cloth defect detection device, in the testing process, if the air permeability of cloth is less, the continuous input of following outside air pump, sealed dish is under the guide effect of positioning disk, break away from the first pressure release hole that corresponds gradually, thereby make the inside high-pressure air of apical groove see through the bleeder vent and outwards spill over, avoid apical groove internal pressure too big, realize the pressure release operation in apical groove, improve the security of detection device when using, if the air permeability of cloth is great, the continuous input of following gas, and promote the piston and slide in second pressure release hole, break away from second pressure release hole until the piston, make the gas of kerve obtain overflowing, thereby ensure that the interior excessive pressure phenomenon can not appear of kerve, further improve detection device's security.

Drawings

FIG. 1 is a perspective view of a first embodiment of the present invention;

FIG. 2 is a perspective view of a second embodiment of the present invention;

FIG. 3 is a schematic perspective view of a portion of the present invention;

FIG. 4 is a schematic perspective view of a portion of the present invention;

FIG. 5 is a schematic view of a first perspective structure of the detecting assembly of the present invention;

FIG. 6 is a perspective view of a second view of the detecting assembly of the present invention;

FIG. 7 is an enlarged view of the structure at A in FIG. 6 according to the present invention;

FIG. 8 is a partially cut-away perspective view of the tumbling seat of the present invention;

fig. 9 is a partially enlarged view of fig. 8 according to the present invention.

In the figure: 1. an installation table; 2. smoothing rollers; 3. a take-up and pay-off roller; 4. an arc-shaped bracket; 5. a tension roller; 6. a driven shaft; 7. a rolling seat; 8. a bottom groove; 9. a drive shaft; 10. a stationary ring; 11. a horizontal connecting rod; 12. an upper drum; 13. a top groove; 14. a first pulley; 15. a second pulley; 16. a drive motor; 17. an upper sliding column; 18. a guide plate; 19. sealing the disc; 20. fixing the disc; 21. a first pressure relief spring; 22. a lower sliding column; 23. a piston; 24. a connecting rod; 25. a guide bar; 26. a second pressure relief spring; 27. a pressure gauge; 28. a communication disc; 29. a one-way valve; 30. and a communicating sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As described in the background of the invention, the prior art has shortcomings, and in order to solve the above technical problems, the present application provides a cloth defect detecting device.

In a typical embodiment of the present application, as shown in fig. 1-9, a cloth defect detecting apparatus includes a mounting table 1, a winding assembly for drawing and winding cloth is mounted on the mounting table 1, the winding assembly includes a winding roller 3 and a driving mechanism capable of driving the winding roller 3 to rotate, the winding roller is mounted at two ends of the mounting table 1, a detecting assembly for detecting air permeability of the cloth is further disposed on the mounting table 1, the detecting assembly can drive the cloth to move continuously when detecting the air permeability of the cloth, the detecting assembly includes an upper rotating drum 12 and a rolling base 7, the upper rotating drum 12 and the rolling base 7 are respectively disposed with a plurality of sets of top grooves 13 and bottom grooves 8, the top grooves 13 are communicated with an external output end, the rolling base 7 and the upper rotating drum 12 are both disposed with a pressure relief assembly, an arc-shaped support 4 is further fixedly mounted on the top of the mounting table 1, the detection assembly is installed on the arc-shaped support 4, the tensioning roller 5 is further rotatably installed on the arc-shaped support 4, one end of cloth is wound on one of the collecting and releasing rollers 3 after being reversed by the tensioning roller 5, when the air permeability of the cloth is detected, one end of the cloth firstly penetrates through the upper rotary drum 12 and the rolling seat 7 and is wound on one of the collecting and releasing rollers 3 through the tensioning roller 5, the collecting and releasing rollers 3 are driven to rotate through the operation of the traction mechanism, the cloth is drawn to move continuously, gas is input into the top groove 13 in the lowest position through an external air pump, the air permeability of the cloth is detected, compared with the existing detection technology in the background technology, the cloth is not required to be kept static, dynamic detection can be achieved, the batch detection efficiency of an enterprise on the cloth is improved, in addition, the pressure relief assembly is arranged, the fact that the air pressure in the bottom groove 8 and the top groove 13 is too large is avoided, and stable detection is achieved.

As an optimal implementation mode in this embodiment, still rotate on the arc support 4 and install driven shaft 6, the both ends of driven shaft 6 extend to outside the both sides of arc support 4 respectively, seat 7 that rolls is fixed cup joints on driven shaft 6, and the cross-section of seat 7 that rolls is regular polygon structure, the fillet has all been seted up at the side edge of seting up kerve 8 on the seat 7 that rolls and the side edge of seting up overhead gage 13 on last rotary drum 12, through seting up the fillet, when making roll seat 7 and last rotary drum 12 mutual rotation interlock, can compress tightly the cloth and play the traction to the cloth, avoid rigid centre gripping to damage the cloth again, go up rotary drum 12 and roll fillet position on the seat 7 and can adopt the rubber material, realize the elasticity centre gripping to the cloth, can also ensure the leakproofness of examining time measuring.

As a preferred embodiment in this embodiment, the arc-shaped support 4 is further rotatably installed with a driving shaft 9 corresponding to the position of the driven shaft 6, two ends of the driving shaft 9 respectively extend out of two sides of the arc-shaped support 4, two ends of the driving shaft 9 are both fixedly connected with fixing rings 10 through a plurality of evenly distributed arc-shaped rods, one sides of the two fixing rings 10 close to each other are both fixedly connected with two sides of the upper rotary drum 12 through a plurality of horizontal connecting rods 11, one ends of the driving shaft 9 and the driven shaft 6 located on the same side are respectively fixedly sleeved with a first belt pulley 14 and a second belt pulley 15 corresponding in position, the installation table 1 is further fixedly installed with a driving motor 16, an output shaft of the driving motor 16 is fixedly connected with an input shaft through a coupler, the other end of the input shaft is fixedly sleeved with a driving belt pulley located on the same plane as the second belt pulley 15, the driving belt pulley is tensioned with the same transmission belt as the first belt pulley 14 and the second belt pulley 15, the inner wall of the upper rotary drum 12 is fixedly provided with a plurality of pressure gauges 27 matched with the corresponding top grooves 13 in position, the input ends of the pressure gauges 27 are respectively communicated with the corresponding top grooves 13, the inside of the driving shaft 9 is hollow, one end of the driving shaft 9 is in a closed state, the driving shaft 9 is provided with a plurality of communicating holes, the driving shaft 9 is sleeved with a communicating disc 28, the communicating disc 28 is communicated with the inside of the driving shaft 9 through the communicating holes, the communicating disc 28 is also communicated with the corresponding top grooves 13 through a plurality of communicating pipes, the communicating pipes are respectively provided with a one-way valve 29, the unsealed end of the driving shaft 9 is rotatably sleeved with a communicating sleeve 30 and keeps relatively sealed with the communicating sleeve 30, the other end of the communicating sleeve 30 is communicated with the output end of an external air pump, during detection, the driving motor 16 operates, the input shaft drives the driving belt pulley to rotate through a coupler, and further under the linkage action of the driving belt, the first belt pulley 14 and the second belt pulley 15 are made to rotate synchronously, it is noted that the diameter of the first belt pulley 14 should be larger than that of the second belt pulley 15 to adapt the rotating speed of the upper rotary drum 12 and the rolling seat 7 to be reasonable, after the first belt pulley 14 and the second belt pulley 15 rotate, the driving shaft 9 and the driven shaft 6 are respectively driven to rotate synchronously, so that the upper rotary drum 12 and the rolling seat 7 rotate synchronously, and the top groove 13 and the bottom groove 8 on the same relative position are made to be engaged with each other, so as to form a relatively sealed environment by matching with the cloth of unit area on the cloth, the external air pump supplies air and inputs the air into the top grooves 13 through the communicating pipes by the communicating sleeve 30 and the communicating disc 28, and the air pressure in the top grooves 13 is reflected visually by the corresponding pressure gauge 27, so as to indirectly reflect the air permeability of the cloth, compared with the detecting device mentioned in the background art, in the cloth rolling process, dynamic synchronous detection is completed, static material distribution is not needed, and the detection efficiency of batch material distribution detection of enterprises is improved.

As a preferred implementation manner in this embodiment, the pressure relief assembly includes a sealing disc 19 for relieving pressure in the top grooves 13, first pressure relief holes are formed in the side walls of the top grooves 13, an upper sliding pillar 17 is slidably sleeved in each of the first pressure relief holes, the sealing disc 19 is fixedly sleeved on the corresponding upper sliding pillar 17, a guide disc 18 is further fixedly sleeved on the upper sliding pillar 17, a plurality of vent holes are formed in the guide disc 18, one end of each of the upper sliding pillars 17 extends out of the corresponding top groove 13 and is fixedly sleeved with a fixed disc 20, a first pressure relief spring 21 is further sleeved on the upper sliding pillar 17, two ends of the first pressure relief spring 21 are respectively and fixedly connected to the side wall of the upper rotating cylinder 12 and the corresponding fixed disc 20, the pressure relief assembly further includes a piston 23 for the bottom groove 8, second pressure relief holes corresponding in position are formed in the side walls of the bottom grooves 8, a lower sliding pillar 22 is slidably sleeved in each of the second pressure relief holes, a plurality of pistons 23 are respectively sleeved in the corresponding second pressure relief holes in a sliding manner and fixedly connected to one end of the corresponding lower sliding column 22, the other end of the lower sliding column 22 extends out of the corresponding second pressure relief holes and is fixedly connected with a guide rod 25 through a connecting rod 24, the guide rods 25 are all sleeved on the rolling seat 7 in a sliding manner, a second pressure relief spring 26 is further sleeved on the guide rod 25, two ends of the second pressure relief springs 26 are respectively fixedly connected to the rolling seat 7 and the corresponding connecting rod 24, during the detection process, if the air permeability of the cloth is small, along with the continuous input of an external air pump, the air in the top groove 13 at the corresponding position is difficult to enter the bottom groove 8 at the other side of the cloth through the cloth, the air pressure in the top groove 13 is too high, the sealing disc 19 is pushed under the guiding action of the guide disc 18 to gradually separate from the corresponding first pressure relief hole, so that the high-pressure air in the top groove 13 overflows outwards through the air vent holes, the pressure in the top groove 13 is prevented from being too high, the pressure relief operation of the top groove 13 is realized, the safety of the detection device in use is improved, if the air permeability of the cloth is large, after the external air pump inputs air into the top groove 13, the air penetrates through the cloth and enters the bottom groove 8 on the other side, along with the continuous input of the air, the pressure in the bottom groove 8 is continuously increased, the piston 23 is pushed to slide in the second pressure relief hole until the piston 23 is separated from the second pressure relief hole, so that the air in the bottom groove 8 is overflowed, under the guiding action of the guide rod 25 and the pulling force action of the second pressure relief spring 26, the piston 23 can smoothly enter the corresponding second pressure relief hole after the pressure relief, the reset is completed, the overpressure phenomenon in the bottom groove 8 is ensured not to occur, the safety of the detection device is further improved, in addition, the safety of the detection device is remarkable in that, under the condition that the air permeability of the cloth is good, the pressure relief assembly in the bottom tank 8 should trigger in preference to the pressure relief assembly in the top tank 13.

As a preferred embodiment in this embodiment, the mounting table 1 is further provided with smoothing rollers 2 corresponding to the positions of the winding and unwinding rollers 3, and the two smoothing rollers 2 at the same relative position are used for mutually matching and smoothing wrinkles on the cloth, so that the wrinkles on the cloth need to be removed no matter the cloth is to be detected or to be rolled after detection, on one hand, detection can be ensured for a single-layer cloth during detection, and on the other hand, attractiveness during rolling of the cloth can be ensured.

The working principle of the invention is as follows: during detection, the driving motor 16 operates, the input shaft drives the driving belt pulley to rotate through the coupler, and further under the linkage action of the transmission belt, the first belt pulley 14 and the second belt pulley 15 rotate synchronously, after the first belt pulley 14 and the second belt pulley 15 rotate, the driving shaft 9 and the driven shaft 6 are respectively driven to rotate synchronously, so that the upper rotary drum 12 and the rolling seat 7 rotate synchronously, and the top groove 13 and the bottom groove 8 on the same relative position are engaged with each other, so that a relatively sealed environment is formed by matching cloth of a unit area on the cloth, an external air pump supplies air, and inputs the air into the top grooves 13 through the communicating pipes through the communicating sleeve 30 and the communicating disc 28, and intuitively reflects the air pressure in the top grooves 13 through the corresponding pressure gauge 27, thereby indirectly reflecting the air permeability of the cloth, compared with the detection device mentioned in the background art, dynamic synchronous detection can be completed in the cloth winding process, cloth does not need to be static, and cloth detection efficiency is improved;

in the detection process, if the air permeability of the cloth is small, along with the continuous input of an external air pump, the air in the top groove 13 at the corresponding position is difficult to penetrate through the cloth and enter the bottom groove 8 at the other side of the cloth, and the air pressure in the top groove 13 is too high, the sealing disc 19 is pushed to gradually separate from the corresponding first pressure relief hole under the guiding action of the guiding disc 18, so that the high-pressure air in the top groove 13 overflows outwards through the air vent, the excessive pressure in the top groove 13 is avoided, the pressure relief operation of the top groove 13 is realized, the safety of the detection device in use is improved, if the air permeability of the cloth is large, after the external air pump inputs the air into the top groove 13, the air enters the bottom groove 8 at the other side through the cloth, along with the continuous input of the air, the pressure in the bottom groove 8 continuously increases, and the piston 23 is pushed to slide in the second pressure relief hole until the piston 23 separates from the second pressure relief hole, make the gas in the kerve 8 obtain overflowing to under the guide effect of guide bar 25 and second pressure release spring 26's pulling force effect, make piston 23 can get into the second pressure release that corresponds downthehole smoothly after the pressure release, accomplish and reset, thereby ensure that excessive pressure phenomenon can not appear in the kerve 8, further improve detection device's security.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cloth defect detecting device, includes mount table (1), its characterized in that: the cloth air permeability detection device is characterized in that a winding assembly used for drawing cloth and winding the cloth is installed on the installation table (1), the winding assembly comprises a winding and unwinding roller (3) and a driving mechanism capable of driving the winding and unwinding roller (3) to rotate, the winding assembly is installed at two ends of the installation table (1) respectively, a detection assembly used for detecting cloth air permeability is further arranged on the installation table (1), the detection assembly can further drive the cloth to move continuously when detecting the cloth air permeability, the detection assembly comprises an upper rotary drum (12) and a rolling seat (7) which correspond to each other in position, a plurality of groups of top grooves (13) and bottom grooves (8) which are matched with each other are formed in the upper rotary drum (12) and the rolling seat (7) respectively, the plurality of top grooves (13) are communicated with an external output end, and air pump pressure relief assemblies are arranged on the rolling seat (7) and the upper rotary drum (12).

2. The cloth defect detecting device of claim 1, wherein: the top of mount table (1) is fixed mounting still has arc support (4), detecting element installs on arc support (4), just still rotate on arc support (4) and install tensioning roller (5), and cloth one end warp tensioning roller (5) switching-over back winding is in one of them receive and release on roller (3).

3. The cloth defect detecting device of claim 2, wherein: still rotate on arc support (4) and install driven shaft (6), the both ends of driven shaft (6) extend to respectively outside the both sides of arc support (4), roll seat (7) fixed cup joint on driven shaft (6), just the cross-section of rolling seat (7) is regular polygonized structure, roll the side edge of seting up on seat (7) kerve (8) and the side edge of seting up on last rotary drum (12) top groove (13) has all seted up the fillet.

4. The cloth defect detecting device of claim 3, wherein: still rotate on arc support (4) install with driven shaft (6) position corresponding driving shaft (9), the both ends of driving shaft (9) extend to respectively outside the both sides of arc support (4), the both ends of driving shaft (9) all through a plurality of arc pole fixedly connected with retainer plates (10) that distribute evenly, two one side that retainer plates (10) are close to each other all through a plurality of horizontal connecting rod (11) with the both sides fixed connection of last rotary drum (12).

5. The cloth defect detecting device of claim 4, wherein: driving shaft (9) with one end that driven shaft (6) are located the homonymy is fixed the cover respectively and is connect corresponding first belt pulley (14) in position and second belt pulley (15), still fixed mounting has driving motor (16) on mount table (1), the output shaft of driving motor (16) passes through shaft coupling fixedly connected with input shaft, the other end of input shaft is fixed cup jointed with second belt pulley (15) are located the driving pulley on the coplanar, driving pulley with first belt pulley (14) reach equal tensioning has same driving belt on second belt pulley (15).

6. The cloth defect detecting device of claim 1, wherein: the pressure relief assembly comprises sealing discs (19) for relieving pressure of the top grooves (13), first pressure relief holes are formed in the side walls of the top grooves (13), upper sliding columns (17) are slidably sleeved in the first pressure relief holes, the sealing discs (19) are fixedly sleeved on the corresponding upper sliding columns (17), guide discs (18) are fixedly sleeved on the upper sliding columns (17), and a plurality of air holes are formed in the guide discs (18);

it is a plurality of the one end of going up traveller (17) all extends to the correspondence the groove (13) is outer and fixed the cup joint has fixed disk (20), it is equipped with first pressure release spring (21) still to overlap on traveller (17), the both ends difference fixed connection of first pressure release spring (21) are in go up the lateral wall of rotary drum (12) and correspond on fixed disk (20).

7. The cloth defect detecting device of claim 6, wherein: the pressure relief assembly further comprises pistons (23) for pressure relief of the bottom grooves (8), second pressure relief holes corresponding to the positions of the side walls of the bottom grooves (8) are formed in the side walls of the bottom grooves, lower sliding columns (22) are slidably sleeved in the second pressure relief holes, and the pistons (23) are slidably sleeved in the corresponding second pressure relief holes respectively and fixedly connected to one ends of the corresponding lower sliding columns (22);

the other end of lower traveller (22) extends to the correspondence outside the second pressure release hole and through connecting rod (24) fixedly connected with guide bar (25), it is a plurality of guide bar (25) all slide the cover and establish on roll seat (7), it is equipped with second pressure release spring (26), a plurality of still to overlap on guide bar (25) the both ends of second pressure release spring (26) are fixed connection respectively roll seat (7) and correspond on connecting rod (24).

8. The cloth defect detecting device of claim 1, wherein: the inner wall of the upper rotary drum (12) is fixedly provided with a plurality of pressure gauges (27) which are matched with the corresponding positions of the top grooves (13), and the input ends of the pressure gauges (27) are respectively communicated with the corresponding top grooves (13).

9. The cloth defect detecting device of claim 4, wherein: the inner part of the driving shaft (9) is hollow, one end of the driving shaft is in a closed state, a plurality of communicating holes are formed in the driving shaft (9), a communicating disc (28) is sleeved on the driving shaft (9), the communicating disc (28) is communicated with the inner part of the driving shaft (9) through the communicating holes, the communicating disc (28) is also communicated with the corresponding top groove (13) through a plurality of communicating pipes, and a check valve (29) is arranged on each communicating pipe;

one unsealed end of the driving shaft (9) is rotatably sleeved with a communicating sleeve (30) and keeps relative sealing with the communicating sleeve (30), and the other end of the communicating sleeve (30) is communicated with the output end of an external air pump.

10. The cloth defect detecting device of claim 1, wherein: the mounting table (1) is further provided with smoothing rollers (2) corresponding to the positions of the collecting rollers (3), and the two smoothing rollers (2) in the same relative position are used for smoothing wrinkles on the cloth.