CN106423928A - Cleaning device for cloth printing conveyor belt - Google Patents

Abstract

The invention proposes a cloth printing conveyor belt cleaning device, which drives the moving frame to enter the bottom of the conveyor belt, starts the cleaning pressure maintenance mechanism, uses the lifting drive device to drive down the pressure roller, and properly applies downward pressure on the conveyor belt to maintain the pressure required for cleaning. The water spray system sprays water on the lower surface of the conveyor belt and the flexible wiping device for wetting. As the conveyor belt moves downstream relative to the flexible wiping device and the hard scraping device, the flexible wiping device uses a flexible water-absorbing wiping layer to clean the lower surface of the conveyor belt. Wiping can wipe and absorb impurities such as water-soluble glue; then the hard scraping device uses a scraper to completely remove the water droplets on the lower surface of the conveyor belt, so as to keep the conveyor belt from remaining too much water and impurities; the removed impurity water Fall into the collection tank of the waste water recovery device for recycling; after cleaning, the mobile frame can be driven to move out of the bottom of the conveyor belt according to the situation, which is convenient for the operation of the conveyor belt and the maintenance of the present invention.

Description

A cloth printing conveyor belt cleaning device

technical field

The invention relates to the field of cloth printing machinery, in particular to a cloth printing conveyor belt cleaning device.

Background technique

In the cloth printing process, the cloth needs to be pasted on the conveyor belt with water-soluble glue for positioning and support. The conveyor belt needs to be refreshed and glued to the cloth. The residue of impurities such as old glue will affect the pasting and printing effect of the cloth, reducing the Cloth printing quality, so it is very important to clean the conveyor belt of old glue and other impurities, but there is no effective cleaning device for cloth printing conveyor belts on the market.

In view of this, the inventor of this case conducted in-depth research on the above-mentioned problem, and then this case was produced.

Contents of the invention

The object of the present invention is to provide a cloth printing conveyor belt cleaning device that can efficiently clean the conveyor belt, has flexible and convenient operation, novel and reasonable structure, and strong practicability.

In order to achieve the above object, the present invention adopts such technical scheme:

A cloth printing conveyor belt cleaning device, including a cleaning mechanism under the conveyor belt, and a cleaning pressure maintaining mechanism that presses the conveyor belt downward to maintain the pressure required for cleaning; the cleaning mechanism includes a water spray system, a flexible wiping device, and a flexible cleaning mechanism. The rigid scraping device downstream of the wiping device, the wastewater recovery device for recycling waste water, and the mobile frame that carries the flexible wiping device, the rigid scraping device and the wastewater recovery device; the flexible wiping device and the rigid scraping device are connected to the on the mobile frame;

The flexible wiping device includes a flexible water-absorbing wiping layer extending transversely along the conveyor belt, and a fixed support frame for fixedly supporting the flexible water-absorbing wiping layer; The second connection slope extending downstream and obliquely downward, the fixed support frame is formed with a deformation space between the first connection slope and the second connection slope for the deformation of the flexible water-absorbing wiping layer; the flexible water-absorbing wiping The layer includes a first connecting portion connected to the first connecting slope, a second connecting portion connected to the second connecting slope, and a connecting portion connected between the first connecting portion and the second connecting portion and connected to the deformation space. The corresponding deformed wiping part;

The rigid scraping and drying device includes a scraper extending laterally along the conveyor belt, and a knife holder for fixing the scraper; the scraper is T-shaped, including an upwardly disposed knife body and a knife fixing portion horizontally arranged below the knife body; The knife holder includes a fixing groove matching the knife fixing part and the lower part of the knife body, the upper end of the knife body protrudes from the fixing groove and extends upwards, and the fixing groove includes a knife at the bottom corresponding to accommodate the knife. The wide groove part of the fixing part and the narrow groove part correspondingly accommodate the lower part of the knife main body above;

The waste water recycling device includes a collecting tank under the flexible wiping device and the rigid scraping device;

The cleaning pressure maintaining mechanism includes at least one pressure maintaining unit, and the pressure maintaining unit includes a pressing roller that presses the conveying belt downward along the transverse direction of the conveying belt, and a lifting drive device that lifts and drives the pressing roller.

The fixed support frame includes a first fixed support bar and a second fixed support bar extending parallel to each other along the transverse direction of the conveyor belt, and the cross-sections of the first fixed support bar and the second fixed support bar are gradually widened from top to bottom The outer side of the first fixed support bar forms the first connection slope, and the outer side of the second fixed support bar forms the second connection slope.

The first fixed support bar is a bent plate, including a first bent plate portion formed with the first connecting slope and a second bent plate portion facing the second fixed support bar; the second fixed The support bar is a bent plate, including a third bent plate portion formed with the second connecting slope and a fourth bent plate portion facing the first fixed support bar.

The first connecting portion and the first bent plate portion are connected together by bolts, and the second connecting portion and the third bent plate portion are connected together by bolts.

The fixing slot runs through the knife holder along the length direction of the scraper.

The tool rest is equipped with a reinforced support frame.

The knife rest is in the shape of a strip extending transversely along the conveyor belt, and the reinforced support frame is a support plate supported downstream of the knife rest and has a right-angled triangle in cross section; the reinforced support frame includes a horizontal support connected to the support plate, a vertical support plate connected with the tool holder, and an inclined support plate inclined gradually downward from upstream to downstream.

It includes two rigid scraping and drying devices arranged upstream and downstream sequentially.

The support includes a first support for carrying the flexible wiping device and two second supports for respectively carrying the two rigid drying devices, the first support and the second support extend laterally along the conveyor belt and their two ends are respectively connected to the The moving frame is connected together, and the second bracket is connected together with the horizontal support plate.

The connection between the knife body and the knife fixing part has rounded chamfers.

The waste water recovery device is arranged under the first support and the second support, the waste water recovery device also includes a discharge pipe, the collection tank has a port communicated with the discharge pipe, and the discharge pipe is equipped with Drain switch.

Two of said pressure maintaining units are included to pressurize said cleaning mechanism.

The lifting drive device includes two synchronously lifting fluid pressure cylinders, the output ends of the two fluid pressure cylinders are located below and are respectively connected to the two ends of the corresponding pressure rollers.

The mobile frame includes a carrier frame for carrying the flexible wiping device, the rigid scraping device and the waste water recovery device, and rollers arranged under the carrier frame.

The moving frame also includes guide wheels and guide rails extending transversely along the conveyor belt and cooperating with the guide wheels.

The guide wheels include two upstream guide wheels located on the upstream side of the carrier, and two downstream guide wheels located on the downstream side of the carrier; A matched upstream guide rail, and a downstream guide rail matched with the two downstream guide wheels.

The water spray system includes a water spray pipeline for spraying water towards the lower surface of the conveyor belt upstream of the flexible wiping device, the water spray pipeline communicates with a water source through a communication pipeline, and the water spray pipeline is equipped with a water spray switch.

After adopting the above technical solution, the cloth printing conveyor belt cleaning device of the present invention breaks through the structural form of the traditional cloth printing conveyor belt cleaning device, and is used to clean the conveyor belt carrying the cloth to be printed. In the actual use process, it drives the flexible wiping device, The mobile frame of the rigid scraping device and the waste water recovery device enters the bottom of the conveyor belt, and the cleaning pressure maintenance mechanism is activated. The pressure roller is driven down by the lifting drive device, and the conveyor belt is properly pressed downward to maintain the pressure required for cleaning, and the water spray system is activated. Spray water on the lower surface of the conveyor belt and the flexible wiping device for wetting. As the conveyor belt moves downstream relative to the flexible wiping device and the hard scraping device, the flexible wiping device uses a flexible water-absorbing wiping layer to wipe the lower surface of the conveyor belt. Wipe and absorb water-soluble glue and other impurities; then the hard scraping and drying device uses a scraper to completely remove the water droplets on the lower surface of the conveyor belt, so as to keep the conveyor belt from remaining too much water and impurities, which is conducive to re-rubbing and printing. The cloth should be bonded together efficiently for printing; the removed impurity water will fall into the collection tank of the waste water recycling device for recycling; after cleaning, the flexible wiping device, hard scraping device and waste water recycling device can be driven to move according to the situation The frame moves out of the bottom of the conveyor belt, which is convenient for the operation of the conveyor belt and the maintenance of the present invention; during the wiping process of the flexible wiping device, the flexible water-absorbing wiping layer utilizes the first connecting portion and the second connecting portion to connect with the first connecting inclined plane and the second connecting inclined plane respectively Fixed (the first connection part and the second connection part are at a certain angle with the conveyor belt, which is more convenient to connect with the fixed support frame, and the connection structure will not scratch the conveyor belt), and use the deformed wiping part to mainly wipe and clean the conveyor belt, flexible water-absorbing wiping layer The first connecting part at a certain angle to the conveyor belt is in close contact with the conveyor belt, and at the same time, the flexible water-absorbing wiping layer uses the deformation space to perform sufficient elastic deformation to maintain adaptive elastic contact with the conveyor belt to ensure the wiping effect; During the drying process, the scraper is connected with the fixed part of the knife and the wide groove part and the narrow groove part of the knife holder, and uses the main body of the knife to scrape and dry the conveyor belt. The structure of the whole scraper is stable and the scraping effect is good. Compared with the prior art, the cloth printing conveyor belt cleaning device of the present invention can efficiently clean the conveyor belt, has flexible and convenient operation, novel and reasonable structure, and strong practicability.

Description of drawings

Fig. 1 is the structural representation of the use state of the present invention;

Fig. 2 is the schematic diagram of the enlarged structure of part A in Fig. 1;

Fig. 3 is a schematic top view of the present invention in use.

In the picture:

1-Cleaning mechanism 11-Water spray system

12-flexible wiping device 121-flexible water-absorbing wiping layer 1211-first connecting part 1212-second connecting part 1213-deformed wiping part 122-fixed support frame 1221-deformation space 1222-first fixed support bar 12221-first bending Plate part 12222-second bent plate part 1223-second fixed support bar 12231-third bent plate part 12232-fourth bent plate part

13-hard scraping device 131-scraper 1311-knife main body 1312-knife fixing part 132-knife holder 1321-wide groove part 1322-narrow groove part 133-reinforced support frame 1331-horizontal support plate 1332-vertical support plate 1333- Diagonal support plate

14-wastewater recovery device 141-collection tank 142-exhaust pipe

15-mobile frame 151-carrying frame 152-roller 153-guide wheel 1531-upstream guide wheel 1532-downstream guide wheel 154-guide rail 1541-upstream guide rail 1542-downstream guide rail

16-bracket 161-first bracket 162-second bracket

2-Cleaning pressure maintenance mechanism 21-Pressure maintenance unit 211-Press roller 212-Elevation drive device

3- Conveyor belt.

detailed description

In order to further explain the technical solutions of the present invention, specific examples are given below to illustrate in detail.

A cloth printing conveyor belt cleaning device of the present invention, as shown in Figures 1-3, includes a cleaning mechanism 1 below the conveyor belt 3, and a cleaning pressure maintaining mechanism 2 that presses the conveyor belt 3 downward to maintain the pressure required for cleaning; The cleaning mechanism 1 includes a water spray system 11, a flexible wiping device 12, a rigid scraping device 13 downstream of the flexible wiping device 12, a wastewater recovery device 14 for reclaiming waste water, and recycling of the flexible wiping device 12, the rigid scraping device 13 and waste water. A mobile frame 15 for carrying the device 14 . The flexible wiping device 12 and the rigid drying device 13 are connected to the mobile frame 15 by a support 16; the flexible wiping device 12 includes a flexible water-absorbing wiping layer 121 extending laterally along the conveyor belt 3, and a fixed support for the flexible water-absorbing wiping layer 121. Frame 122; the fixed support frame 122 has a first connection slope extending toward the upstream and obliquely downward and a second connection slope extending downstream and obliquely downward, and the fixed support frame 122 is formed with the first connection slope and the second connection slope The deformation space 1221 for the deformation of the flexible water-absorbing wiping layer 121 between; A deformed wiping part 1213 between the first connecting part 1211 and the second connecting part 1212 and corresponding to the deformed space 1221; the rigid scraping device 13 includes a scraper 131 extending laterally along the conveyor belt 3, and a knife holder 132 for fixing the scraper 131 The scraper 131 is T-shaped, including an upwardly disposed knife body 1311 and a knife fixing portion 1312 horizontally arranged below the knife body 1311; The upper end of the main body 1311 protrudes from the fixing groove and extends upward. The fixing groove includes a wide groove part 1321 corresponding to the knife fixing part 1312 at the bottom and a narrow groove part 1322 corresponding to the lower part of the knife main body 1311 at the top; the waste water recycling device 14 includes a receiving The collection tank 141 below the flexible wiping device 12 and the rigid scraping device 13; the cleaning pressure maintaining mechanism 2 includes at least one pressure maintaining unit 21, and the pressure maintaining unit 21 includes a pressure roller 211 that presses against the conveyor belt 3 in the lateral direction of the conveyor belt 3 And the lifting drive device 212 that lifts and drives the pressure roller 211. The present invention is used to clean the conveyor belt 3 carrying the cloth to be printed. In the actual use process, the mobile frame 15 carrying the flexible wiping device 12, the rigid scraping device 13 and the waste water recovery device 14 is driven to enter the bottom of the conveyor belt 3 and start The cleaning pressure maintaining mechanism 2 utilizes the lifting drive device 212 to lower the pressure roller 211 to apply downward pressure on the conveyor belt 3 to maintain the pressure required for cleaning, and starts the water spray system 11 to spray water on the lower surface of the conveyor belt 3 and the flexible wiping device 12. Wet, as the conveyor belt 3 moves downstream relative to the flexible wiping device 12 and the rigid wiping device 13, the flexible wiping device 12 uses the flexible water-absorbing wiping layer 121 to wipe the lower surface of the conveyor belt 3, and water-soluble glue, etc. Impurities are wiped and absorbed; then the rigid scraping device 13 uses the scraper 131 to completely remove the water droplets on the lower surface of the conveyor belt 3, so as to keep the conveyor belt from remaining too much water and impurities, which is beneficial for re-gluing and corresponding to the cloth to be printed Efficient bonding together for printing; the removed impurity water falls into the collection tank 141 of the waste water recycling device 14 for recycling; after cleaning, the flexible wiping device 12, the rigid scraping device 13 and the waste water recycling device can be driven according to the situation The moving frame 15 of 14 moves out below the conveyor belt 3, which is convenient for the operation of the conveyor belt 3 and the maintenance of the present invention; during the wiping process of the flexible wiping device 12, the flexible water-absorbing wiping layer 121 utilizes the first connecting portion 1211 and the second connecting portion 1212 to connect with The first connection slope and the second connection slope are connected and fixed (the first connection part 1211 and the second connection part 1212 form a certain angle with the conveyor belt 3, which is more convenient to be connected with the fixed support frame 122, and the connection structure will not scratch the conveyor belt), and use The deformed wiping part 1213 mainly wipes and cleans the conveyor belt 3. The flexible water-absorbing wiping layer 121 makes use of the first connection part 1211 at a certain angle to the conveyor belt 3 to closely contact the conveyor belt 3. Elastic deformation to keep the adaptive elastic contact with the conveyor belt 3 to ensure the wiping effect; during the drying process of the rigid scraping device 13, the scraper 131 is fixed to the wide groove portion 1321 and the narrow groove portion 1322 of the knife holder 132 by the knife fixing portion 1312 The buckles are connected together, and the conveyor belt 3 is scraped dry by using the knife main body 1311. The structure of the whole scraper is stable, and the scraping effect is good.

In order to realize the specific structure of the fixed support frame 122, preferably, the fixed support frame 122 includes a first fixed support bar 1222 and a second fixed support bar 1223 extending parallel to each other along the transverse direction of the conveyor belt 3, the first fixed support bar 1222 and the second fixed support bar 1222 The cross-sections of the support bars 1223 are triangles that gradually become wider from top to bottom. The outer side of the first fixed support bar 1222 forms a first connecting slope, and the outer side of the second fixed support bar 1223 forms a second connecting slope. In the actual use of the present invention, this structure is more convenient for processing and installation.

Preferably, the first fixed support bar 1222 is a bent plate, including a first bent plate portion 12221 formed with a first connecting slope and a second bent plate portion 12222 facing the second fixed support bar 1223; the second fixed support The bar 1223 is a bent plate, including a third bent plate portion 12231 formed with a second connecting slope and a fourth bent plate portion 12232 facing the first fixed support bar 1222 . In the actual use of the present invention, the first fixed support bar 1222 and the second fixed support bar 1223 in the form of bent plates save more material on the basis of ensuring their own strength and connection strength with the bracket 16, and they are more compatible with the first connecting part 1211 The connection with the second connection part 1212 is more convenient. The specific structure can be, the first fixed support bar 1222 and the second fixed support bar 1223 angle steel.

Preferably, the first connecting part 1211 and the first bent plate part 12221 are connected together by bolts, and the second connecting part 1212 and the third bent plate part 12231 are connected together by bolts. This structure is simple, firm and flexible disassembly.

Preferably, the fixing groove runs through the knife holder 132 along the length direction of the scraper 131 . In the actual use of the present invention, the scraper 131 can be inserted into the fixing groove from the end of the fixing groove for installation, the structure is simple and firm, and the operation is more convenient.

Preferably, the tool holder 132 is equipped with a reinforced support frame 133 , the reinforced support frame 133 can enhance the strength of the tool holder 132 , improve the working performance and prolong the service life of the tool holder 132 .

In order to realize the specific structure of the reinforced support frame 133, preferably, the knife rest 132 is a bar shape extending laterally along the conveyor belt 3, and the reinforced support frame 133 is a support plate supported on the downstream of the knife rest 132 and the cross section is a right triangle; the reinforced support frame 133 includes a horizontal support plate 1331 connected to the bracket 16, a vertical support plate 1332 connected to the tool rest 132, and an inclined support plate 1333 gradually inclined downward from upstream to downstream. In the actual use of the present invention, the reinforced support frame 133 saves more materials on the basis of ensuring its own strength and connection strength with the bracket 16, and has a simple, firm and reliable structure.

In order to further enhance the scraping effect on the conveyor belt 3 , preferably, the present invention includes two rigid scraping devices 13 arranged upstream and downstream sequentially.

In order to realize the specific structure of the bracket 16, preferably, the bracket 16 includes a first bracket 161 carrying the flexible wiping device 12 and two second brackets 162 respectively carrying two rigid drying devices 13, the first bracket 161 and the second bracket 162 Extending laterally along the conveyor belt 3 , the two ends are respectively connected to the moving frame 15 , and the second bracket 162 is connected to the horizontal support plate 1331 . In the actual use process of the present invention, the structure is simple, the cost is low and the firmness is strong.

Preferably, the connection between the knife main body 1311 and the knife fixing part 1312 has rounded chamfers. During the actual use of the present invention, the rounded corners can prevent the root of the knife body 1311 from being damaged due to stress concentration, and ensure the strength of the scraper 131 .

Preferably, the waste water recovery device 14 is arranged below the first support 161 and the second support 162, the waste water recovery device 14 also includes a discharge pipe 142, the collection tank 141 has a port communicated with the discharge pipe 142, and the discharge pipe 142 is equipped with a discharge pipe 142. switch (not shown in the figure). During the actual use of the present invention, the staff can operate the discharge switch according to the situation to open the discharge pipe 142 to discharge the sewage in the collection tank 141 .

Preferably, the present invention includes two pressure maintaining units 21 that apply pressure to the cleaning mechanism 1. The two pressure maintaining units 21 can cooperate with each other to apply pressure to the conveyor belt 3, and cooperate with the cleaning mechanism 1 more flexibly to achieve excellent cleaning effect.

Preferably, the lifting drive device 212 includes two synchronous lifting fluid pressure cylinders, the output ends of the two fluid pressure cylinders are located below and are respectively connected to the two ends of the corresponding pressure rollers 211, and each lifting drive device 212 passes through two fluid pressure cylinders. By synchronously lifting and driving the corresponding pressure rollers 211, the pressure of the pressure rollers 211 on the conveyor belt 3 is more balanced and stable. The specific structure can be that the upper end of the fluid pressure cylinder is connected with the cloth printing machine, and the fluid pressure cylinder is an air cylinder or an oil cylinder.

In order to realize the specific structure of the mobile frame 15 , preferably, the mobile frame 15 includes a carrier 151 carrying the flexible wiping device 12 , the rigid scraping device 13 and the waste water recovery device 14 , and rollers 152 arranged under the carrier 151 .

Preferably, the moving frame 15 further includes guide wheels 153 and guide rails 154 extending transversely along the conveyor belt 3 and matching with the guide wheels 153 . During the actual use of the present invention, the guide wheels 153 and the guide rails 154 cooperate to guide the movement of the mobile frame 15, so that the movement of the mobile frame 15 is more precise and stable, and a more excellent cleaning effect is achieved.

Preferably, the guide wheels 153 include two upstream guide wheels 1531 located on the upstream side of the carrier 151, and two downstream guide wheels 1532 located on the downstream side of the carrier 151; The matched upstream guide rail 1541 and the downstream guide rail 1542 matched with the two downstream guide wheels 1532 . In the actual use of the present invention, two upstream guide wheels 1531 and two downstream guide wheels 1532 cooperate with the upstream guide rail 1541 and the downstream guide rail 1542 respectively to guide the mobile frame 15 along the horizontal direction of the conveyor belt 3, so that the mobile frame 15 can move along the conveyor belt. 3 sideways for precise and smooth movement of push and pull.

Preferably, the water spray system 11 includes a water spray pipeline that sprays water toward the lower surface of the conveyor belt 3 at the upstream of the flexible wiping device 12, and the water spray pipeline communicates with a water source (not shown) through a communication pipeline (not shown in the figure) Connected, the water spray pipeline is equipped with a water spray switch (not shown in the figure). In the actual use of the present invention, the water source supplies water to the water spray pipeline through the communication pipeline, and the water spray pipeline sprays water to the conveyor belt 3 . The specific structure can be that a plurality of water spray holes facing the conveyor belt 3 are arranged on the water spray pipe.

The product form of the present invention is not limited to the illustrations and examples of this case, and anyone who makes appropriate changes or modifications of similar ideas to it shall be deemed not to depart from the scope of the patent of the present invention.

Claims (10)

1. A cloth printing conveyor belt cleaning device, characterized in that: it comprises a cleaning mechanism below the conveyor belt, and a cleaning pressure maintenance mechanism that presses the conveyor belt downwards to maintain the pressure required for cleaning; the cleaning mechanism includes a water spray system, A flexible wiping device, a rigid scraping device downstream of the flexible wiping device, a wastewater recycling device for recycling wastewater, and a mobile frame for carrying the flexible wiping device, the rigid scraping device and the wastewater recovery device; the flexible wiping device and the hard scraping device The dry device is connected to the mobile frame through a bracket; The flexible wiping device includes a flexible water-absorbing wiping layer extending transversely along the conveyor belt, and a fixed support frame for fixedly supporting the flexible water-absorbing wiping layer; The second connection slope extending downstream and obliquely downward, the fixed support frame is formed with a deformation space between the first connection slope and the second connection slope for the deformation of the flexible water-absorbing wiping layer; the flexible water-absorbing wiping The layer includes a first connecting portion connected to the first connecting slope, a second connecting portion connected to the second connecting slope, and a connecting portion connected between the first connecting portion and the second connecting portion and connected to the deformation space. The corresponding deformed wiping part; The rigid scraping and drying device includes a scraper extending laterally along the conveyor belt, and a knife holder for fixing the scraper; the scraper is T-shaped, including an upwardly disposed knife body and a knife fixing portion horizontally arranged below the knife body; The knife holder includes a fixing groove matching the knife fixing part and the lower part of the knife body, the upper end of the knife body protrudes from the fixing groove and extends upwards, and the fixing groove includes a knife at the bottom corresponding to accommodate the knife. The wide groove part of the fixing part and the narrow groove part correspondingly accommodate the lower part of the knife main body above; The waste water recycling device includes a collecting tank under the flexible wiping device and the rigid scraping device; The cleaning pressure maintaining mechanism includes at least one pressure maintaining unit, and the pressure maintaining unit includes a pressing roller that presses the conveying belt downward along the transverse direction of the conveying belt, and a lifting drive device that lifts and drives the pressing roller. 2. A cloth printing conveyor belt cleaning device according to claim 1, characterized in that: the fixed support frame includes a first fixed support bar and a second fixed support bar extending parallel to each other along the transverse direction of the conveyor belt, the first fixed support bar The cross-sections of the fixed support bar and the second fixed support bar are triangles that gradually widen from top to bottom, the outer side of the first fixed support bar forms the first connecting slope, and the second fixed support bar The outer side forms the second connection slope. 3. A cloth printing conveyor belt cleaning device according to claim 2, characterized in that: said first fixed support bar is a bent plate, comprising a first bent plate portion formed with said first connecting slope and The second bent plate portion facing the second fixed support bar; the second fixed support bar is a bent plate, including a third bent plate portion formed with the second connecting slope and facing the first The fourth bent plate portion of the support bar is fixed. 4. A cloth printing conveyor belt cleaning device according to claim 3, characterized in that: the first connecting part and the first bent plate part are connected together by bolts, and the second connecting part and the The third bent plate parts are connected together by bolts. 5. A cloth printing conveyor belt cleaning device according to any one of claims 1-4, characterized in that: the fixing groove runs through the knife holder along the length direction of the scraper. 6. A cloth printing conveyor belt cleaning device according to claim 5, characterized in that: said knife holder is equipped with a reinforcing support frame. 7. A cloth printing conveyor belt cleaning device according to claim 6, characterized in that: the knife rest is in the shape of a strip extending laterally along the conveyor belt, and the reinforcing support frame is supported downstream of the knife rest and has a cross-section It is a right triangle support plate; the reinforced support frame includes a horizontal support plate connected with the bracket, a vertical support plate connected with the knife rest, and an inclined support plate inclined gradually downward from upstream to downstream. 8. A cleaning device for a cloth printing conveyor belt according to claim 7, characterized in that it comprises two rigid scraping and drying devices arranged upstream and downstream in sequence. 9. A cloth printing conveyor belt cleaning device according to claim 8, characterized in that: said support includes a first support for carrying said flexible wiping device and two second support for carrying two said rigid scraping devices respectively. As for the support, the first support and the second support extend laterally along the conveyor belt, and the two ends are respectively connected to the moving frame, and the second support is connected to the horizontal support plate. 10 . The cloth printing conveyor belt cleaning device according to claim 9 , wherein the connection between the knife body and the knife fixing part has a rounded chamfer. 11 .