A special pre-shrinking device for textile printing pre-treatment

Abstract

A special preshrinking device for textile printing pretreatment, comprising a front frame, a front fixed roller, a front roller connector, an air jet chamber, a pretreatment roller, an air inlet pipe, a rear frame, a rear fixed roller, a rear roller connector, a preshrinking assembly, and an adjusting assembly; the front frame is arranged at one end of the air jet chamber; the front fixed roller is arranged between the front frames; the air jet chamber is a hollow structure, and an air jet chamber opening is formed at both ends of the air jet chamber; a guide roller is arranged in the air jet chamber opening; the pretreatment roller is arranged transversely in the air jet chamber; the air inlet pipe is arranged transversely at the top of the air jet chamber; the rear frame is arranged at one end of the air jet chamber, symmetrically, and each rear frame is fixedly connected to the outer shell at one end of the air jet chamber; the rear fixed roller is arranged between the rear frames; the preshrinking assemblies are arranged in a square staggered manner; and the adjusting assemblies are arranged on both sides of a preshrinking assembly. The present invention has a fast wetting rate, reduces the amount of steam injection, and can accurately control the moisture content of the preshrinked textile.

Description

Technical Field

[0001] The invention relates to the field of textile production equipment, in particular to a special preshrinking equipment for textile printing pretreatment. Background Art

[0002] In the production process of textiles, the finished fabrics need to be subjected to multiple treatments to achieve the best product performance. In order to make the textile fabrics soft, the textiles need to be shrunk. Shrinkage treatment refers to the process of using physical methods to reduce the shrinkage of the fabric after immersion in water to reduce shrinkage, also known as mechanical pre-shrinkage. Mechanical pre-shrinkage first wets the fabric by spraying steam or spray, then applies mechanical extrusion in the warp direction to increase the buckling wave height, and then dries it in a loose manner. The shrinkage rate of cotton cloth after pre-shrinkage can be reduced to less than 1%, and the softness of the fabric feel will also be improved due to the mutual extrusion and rubbing between fibers and yarns.

[0003] The pre-shrinking equipment in the prior art has the following technical defects: 1. During the pre-shrinking process of textiles, it is necessary to perform a steam jet treatment. The jet steam is transported through a pipeline and ejected from the jet hole to directly hit the surface of the textile. If the width of the jet is smaller than the width of the textile surface, the textile will not be fully wetted, resulting in a poor shrinking effect of the textile. If the width of the jet is larger than the width of the textile surface, the excess jet steam will be lost into the air, resulting in waste. It is difficult to control the amount of steam when steam is sprayed on the textile, and the steam can only be sprayed on one side of the textile, resulting in a low textile wetting rate. 2. When pre-shrinking the textile, only one side of the textile is heated for pre-shrinking. The textile has not been repeatedly folded and heated for pre-shrinking, and the pre-shrinking process of the textile is uneven and insufficient. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present invention discloses a special pre-shrinking device for textile printing pre-treatment, and its specific technical scheme is as follows: a special pre-shrinking device for textile printing pre-treatment, comprising a front frame, a front fixed roller, a front roller connecting piece, an air jet chamber, a pre-treatment roller, an air inlet pipe, a rear frame, a rear fixed roller, a rear roller connecting piece, a pre-shrinking component, and an adjusting component;

[0005] The front frame is arranged at one end of the jet chamber and is symmetrically arranged, and each of the front frames is fixedly connected to the outer shell at one end of the jet chamber; the number of the front fixed rollers is two, which are divided into an upper front roller and a lower front roller, and the upper front roller and the lower front roller are symmetrically arranged up and down, and the lower front roller is arranged between the front frames, and the two ends of the lower front roller are rotated with the front frames on both sides through bearings; the number of the front roller connecting members is two, and each of the front roller connecting members is symmetrically arranged at the top of the front frames on both sides, and the front roller connecting members are fixed to the front frames through fasteners, and the upper front roller is arranged between the front roller connecting members on both sides, and the two ends of the upper front roller are rotated with the front roller connecting members on both sides through bearings;

[0006] The jet chamber is of a hollow structure, and the centers of the two ends of the jet chamber are of through-hole structures to form an opening of the jet chamber; a guide roller is arranged in the jet chamber opening, and the two ends of the guide roller are rotated by bearings and the side walls of the two ends of the jet chamber opening; the pretreatment roller is transversely arranged in the jet chamber, and the two ends of the pretreatment roller are rotated by bearings and the side walls of the jet chamber; a drain pipe is arranged at the bottom end of the jet chamber; the air inlet pipe is transversely arranged at the top of the jet chamber, and the air inlet pipe is fixedly connected to the jet chamber by fasteners, and a nozzle is arranged at the bottom end of the air inlet pipe, and the nozzle is vertically connected to the air inlet pipe;

[0007] The rear frame is arranged at one end of the jet chamber and is symmetrically arranged, and each of the rear frames is fixedly connected to the outer shell at one end of the jet chamber; the number of the rear fixed rollers is two, which are divided into an upper rear roller and a lower rear roller, and the upper rear roller and the lower rear roller are symmetrically arranged up and down, and the lower rear roller is arranged between the rear frames, and the two ends of the lower rear roller are rotated with one end of the rear frames on both sides through bearings; the number of the rear roller connecting members is two, and each of the rear roller connecting members is symmetrically arranged on the top surface of one end of the rear frames on both sides, and the rear roller connection is fixed to the rear frame through fasteners, and the upper rear roller is placed between the rear roller connecting members on both sides, and the two ends of the upper rear roller are rotated with the rear roller connecting members on both sides through bearings;

[0008] The number of the pre-shrinkage components is two, each of which is arranged at one end of the rear frame, and the two pre-shrinkage components are arranged in a square and staggered manner; each of the pre-shrinkage components comprises a support frame, a pressure roller, a clamping roller, a conveying roller, a conveyor belt, a heating roller connecting piece and a heating roller, the support frame is arranged on one side of the rear frame and is symmetrically arranged, and each of the support frames is fixedly connected to the rear frame; the pressure roller is arranged at the bottom end of one side of the support frame, and the pressure roller rotates with the rear frames on both sides through a bearing; the clamping roller is arranged at the bottom end of the other side of the support frame, and the clamping roller rotates with the rear frames on both sides through a bearing; the conveying roller is arranged at the top of the support frame, and the conveying roller rotates with the support frames on both sides through a bearing; the conveyor belt is wrapped around the outside of the pressure roller, the clamping roller and the conveying roller, the heating roller connecting piece is arranged on one side of the rear frame, and is arranged opposite to the support frame, the heating roller connecting piece is fixed to the rear frame through a fastener, and the heating roller is arranged between the heating roller connecting pieces on both sides, and rotates with the heating roller connecting piece through a bearing;

[0009] The adjustment component includes an adjustment block, a telescopic rod and a sleeve, and the adjustment component is arranged on both sides of one of the pre-shrinkage components; the adjustment block is arranged on the rear frame surface and is fixedly connected to the rear frame; the center of the adjustment block is a hollow structure to form an adjustment block slide hole; the telescopic rod is arranged on one side of the support frame and is fixedly connected to the support frame by fasteners; the sleeve is arranged at the top of the telescopic rod, and the sleeve is vertically fixedly connected to the telescopic rod; both ends of the pressure roller and the clamping roller of one of the pre-shrinkage components extend out of the adjustment block slide hole, and are rotated with the sleeves on both sides through bearings.

[0010] Furthermore, the cross section of the jet chamber is in a hexagonal shape, with a structure that is wide in the middle and narrow at the top and bottom.

[0011] Furthermore, the jet chamber openings on both sides are symmetrically arranged, each jet chamber opening is a rectangular structure, and the length of the jet chamber opening is consistent with the width of the front fixed roller.

[0012] Furthermore, a water collecting plate is provided in the opening of the jet chamber, and the water collecting plate is transversely arranged at the top of the jet chamber opening and fixedly connected to the inside of the jet chamber to form an integrated structure; the cross-section of the water collecting plate is an "L"-shaped structure, and the water collecting plate and the inner wall of the jet chamber are grooved to form a water collecting trough.

[0013] Furthermore, the center setting height of the pretreatment roller is higher than the center setting height of the guide rollers on both sides; the outer circumference of the pretreatment roller is a convex structure to form a pretreatment roller bump, and the cross-section of each pretreatment roller bump is a trapezoidal structure with a narrow top and a wide bottom, and the top surface of each pretreatment roller bump is an arc-shaped structure.

[0014] Furthermore, the rear frame has a trapezoidal structure.

[0015] Furthermore, the adjustment blocks arranged on the rear frame on each side are arranged in a relatively oblique direction; and each of the telescopic rods is arranged in the same direction corresponding to each of the adjustment blocks.

[0016] Furthermore, the telescopic rod can be a pneumatic telescopic rod or an electric push rod.

[0017] Furthermore, the bottom ends of the front frame and the rear frame are each provided with a foot, the foot is vertically arranged, and the foot is vertically fixedly connected to the front frame and the rear frame respectively.

[0018] Furthermore, the fastener is one or more of a throat clamp, a rivet, an expansion screw, a bolt, a nut, a screw, and a self-tapping screw.

[0019] The structural principle of the present invention is:

[0020] When the present invention is used, the textile is placed on the front frame, and is transmitted from the opening of the jet chamber to the jet chamber through the clamping and transmission action of the upper front roller and the lower front roller, and the guiding action of the guide roller. The textile contacts the pretreatment roller protrusion and is transmitted out of the jet chamber by the pretreatment roller, and then is clamped and transmitted by the rear fixed roller; the steam passes through the air inlet pipe and is ejected from the nozzle, sprayed on the upper surface of the textile, and the whole steam enters the gap between the pretreatment roller protrusion and the textile from both sides at the same time, and wets the lower surface of the textile. The steam in the jet chamber condenses through the inner wall and slides into the water collection tank in the form of water droplets, and drips to the bottom of the jet chamber and is discharged from the drain pipe. The textile passes through the preshrinkage assembly, is squeezed by the heating roller and the conveyor belt, and is heated and pre-shrunk. The textile is heated and pre-shrunk on both sides and then transmitted to the end of the device.

[0021] This Fanming adjustment component can adjust the angles of the pressure roller and the clamping roller of each group of pre-shrinking components. The lifting rod is extended, and the lifting rod drives the sleeve to rise. The two ends of the pressure roller and the clamping roller slide in the sliding hole of the adjustment block. The pressure roller and the clamping roller are lifted at the same time, and the contact area between the conveyor belt and the heating roller is increased, so that the textile can be pre-shrunk in a larger area.

[0022] The beneficial effects of the present invention are:

[0023] The present invention designs a jet chamber structure before pre-shrinking of textiles to pre-wet the surface of the textiles. The jet device has a simple structure and ensures that the textiles can be wetted on all sides at the same time in the jet chamber, the textile wetting process is sufficient, and the wetting rate is fast; at the same time, the jet chamber prevents excessive loss of steam, and the steam injection amount can be reduced to keep the temperature in the jet chamber constant. Steam condensed water can be smoothly discharged from the inner side wall of the chamber, and there is no droplet pollution to the textile surface.

[0024] During the preshrinking process of the textile, the present invention performs a forward and backward folding process on the textile, and simultaneously performs forward and backward heating preshrinking on the textile, thereby ensuring the effect of the preshrinking process and enhancing the toughness of the textile; the pressure roller and the clamping roller are provided with an adjustment component structure, which can change the contact area between the conveyor belt and the heating roller, effectively adjust the preshrinking time of the textile, and can accurately control the moisture content of the textile after preshrinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 The present invention Figure 1 A is a partial enlarged schematic diagram.

[0027] Figure 3 It is a structural schematic diagram of the jet chamber of the present invention.

[0028] Figure 4 It is a schematic diagram of the working process of two groups of pre-shrinkage components of the present invention.

[0029] List of figure marks: front frame 1, front fixed roller 2, upper front roller 2-1, lower front roller 2-2, front roller connecting piece 3, jet chamber 4, jet chamber opening 4-1, guide roller 4-2, drain pipe 4-3, water collecting plate 4-4, water collecting trough 4-5, pretreatment roller 5, pretreatment roller protrusion 5-1, air inlet pipe 6, nozzle 6-1, rear frame 7, rear fixed roller 8, upper rear roller 8-1, lower rear roller 8-2, rear roller connecting piece 9, preshrinkage assembly 10, support frame 10-1, pressure roller 10-2, clamping roller 10-3, conveying roller 10-4, conveyor belt 10-5, heating roller connecting piece 10-6, heating roller 10-7, adjustment assembly 11, adjustment block 11-1, telescopic rod 11-2, sleeve 11-3, adjustment block slide hole 11-4, base 12. DETAILED DESCRIPTION

[0030] In order to make the technical solution of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings. Any equivalent replacement of the technical features of the technical solution of the present invention and any solution derived by conventional reasoning shall fall within the protection scope of the present invention. The fixed connection, fixed setting, and fixed structure mentioned in this embodiment are all well-known technologies known to those skilled in the art such as gluing, welding, screw connection, bolt and nut connection, and riveting.

[0031] As can be seen from the accompanying drawings, a preshrinking device specially used for textile printing pretreatment includes a front frame, a front fixed roller, a front roller connecting piece, an air jet chamber, a pretreatment roller, an air inlet pipe, a rear frame, a rear fixed roller, a rear roller connecting piece, a preshrinking component, and an adjusting component;

[0032] The front frame is arranged at one end of the jet chamber and is symmetrically arranged, and each of the front frames is fixedly connected to the outer shell at one end of the jet chamber; the number of the front fixed rollers is two, which are divided into an upper front roller and a lower front roller, and the upper front roller and the lower front roller are symmetrically arranged up and down, and the lower front roller is arranged between the front frames, and the two ends of the lower front roller are rotated with the front frames on both sides through bearings; the number of the front roller connecting members is two, and each of the front roller connecting members is symmetrically arranged at the top of the front frames on both sides, and the front roller connecting members are fixed to the front frames through fasteners, and the upper front roller is arranged between the front roller connecting members on both sides, and the two ends of the upper front roller are rotated with the front roller connecting members on both sides through bearings;

[0033] The jet chamber is of a hollow structure, and the centers of the two ends of the jet chamber are of through-hole structures to form an opening of the jet chamber; a guide roller is arranged in the jet chamber opening, and the two ends of the guide roller are rotated by bearings and the side walls of the two ends of the jet chamber opening; the pretreatment roller is transversely arranged in the jet chamber, and the two ends of the pretreatment roller are rotated by bearings and the side walls of the jet chamber; a drain pipe is arranged at the bottom end of the jet chamber; the air inlet pipe is transversely arranged at the top of the jet chamber, and the air inlet pipe is fixedly connected to the jet chamber by fasteners, and a nozzle is arranged at the bottom end of the air inlet pipe, and the nozzle is vertically connected to the air inlet pipe;

[0034] The rear frame is arranged at one end of the jet chamber and is symmetrically arranged, and each of the rear frames is fixedly connected to the outer shell at one end of the jet chamber; the number of the rear fixed rollers is two, which are divided into an upper rear roller and a lower rear roller, and the upper rear roller and the lower rear roller are symmetrically arranged up and down, and the lower rear roller is arranged between the rear frames, and the two ends of the lower rear roller are rotated with one end of the rear frames on both sides through bearings; the number of the rear roller connecting members is two, and each of the rear roller connecting members is symmetrically arranged on the top surface of one end of the rear frames on both sides, and the rear roller connection is fixed to the rear frame through fasteners, and the upper rear roller is placed between the rear roller connecting members on both sides, and the two ends of the upper rear roller are rotated with the rear roller connecting members on both sides through bearings;

[0035] The number of the pre-shrinkage components is two, each of which is arranged at one end of the rear frame, and the two pre-shrinkage components are arranged in a square and staggered manner; each of the pre-shrinkage components comprises a support frame, a pressure roller, a clamping roller, a conveying roller, a conveyor belt, a heating roller connecting piece and a heating roller, the support frame is arranged on one side of the rear frame and is symmetrically arranged, and each of the support frames is fixedly connected to the rear frame; the pressure roller is arranged at the bottom end of one side of the support frame, and the pressure roller rotates with the rear frames on both sides through a bearing; the clamping roller is arranged at the bottom end of the other side of the support frame, and the clamping roller rotates with the rear frames on both sides through a bearing; the conveying roller is arranged at the top of the support frame, and the conveying roller rotates with the support frames on both sides through a bearing; the conveyor belt is wrapped around the outside of the pressure roller, the clamping roller and the conveying roller, the heating roller connecting piece is arranged on one side of the rear frame, and is arranged opposite to the support frame, the heating roller connecting piece is fixed to the rear frame through a fastener, and the heating roller is arranged between the heating roller connecting pieces on both sides, and rotates with the heating roller connecting piece through a bearing;

[0036] The adjustment component includes an adjustment block, a telescopic rod and a sleeve, and the adjustment component is arranged on both sides of one of the pre-shrinkage components; the adjustment block is arranged on the rear frame surface and is fixedly connected to the rear frame; the center of the adjustment block is a hollow structure to form an adjustment block slide hole; the telescopic rod is arranged on one side of the support frame and is fixedly connected to the support frame by fasteners; the sleeve is arranged at the top of the telescopic rod, and the sleeve is vertically fixedly connected to the telescopic rod; both ends of the pressure roller and the clamping roller of one of the pre-shrinkage components extend out of the adjustment block slide hole, and are rotated with the sleeves on both sides through bearings.

[0037] Furthermore, the cross section of the jet chamber is in a hexagonal shape, with a structure that is wide in the middle and narrow at the top and bottom.

[0038] Furthermore, the jet chamber openings on both sides are symmetrically arranged, each jet chamber opening is a rectangular structure, and the length of the jet chamber opening is consistent with the width of the front fixed roller.

[0039] Furthermore, a water collecting plate is provided in the opening of the jet chamber, and the water collecting plate is transversely arranged at the top of the jet chamber opening and fixedly connected to the inside of the jet chamber to form an integrated structure; the cross-section of the water collecting plate is an "L"-shaped structure, and the water collecting plate and the inner wall of the jet chamber are grooved to form a water collecting trough.

[0040] Furthermore, the center setting height of the pretreatment roller is higher than the center setting height of the guide rollers on both sides; the outer circumference of the pretreatment roller is a convex structure to form a pretreatment roller bump, and the cross-section of each pretreatment roller bump is a trapezoidal structure with a narrow top and a wide bottom, and the top surface of each pretreatment roller bump is an arc-shaped structure.

[0041] Furthermore, the rear frame has a trapezoidal structure.

[0042] Furthermore, the adjustment blocks arranged on the rear frame on each side are arranged in a relatively oblique direction; and each of the telescopic rods is arranged in the same direction corresponding to each of the adjustment blocks.

[0043] Furthermore, the telescopic rod can be a pneumatic telescopic rod or an electric push rod.

[0044] Furthermore, the fastener is one or more of a throat clamp, a rivet, an expansion screw, a bolt, a nut, a screw, and a self-tapping screw.

[0045] The structural principle of the present invention is:

[0046] When the present invention is used, the textile is placed on the front frame, and is transmitted from the opening of the jet chamber to the jet chamber through the clamping and transmission action of the upper front roller and the lower front roller, and the guiding action of the guide roller. The textile contacts the pretreatment roller protrusion and is transmitted out of the jet chamber by the pretreatment roller, and then is clamped and transmitted by the rear fixed roller; the steam passes through the air inlet pipe and is ejected from the nozzle, sprayed on the upper surface of the textile, and the whole steam enters the gap between the pretreatment roller protrusion and the textile from both sides at the same time, and wets the lower surface of the textile. The steam in the jet chamber condenses through the inner wall and slides into the water collection tank in the form of water droplets, and drips to the bottom of the jet chamber and is discharged from the drain pipe. The textile passes through the preshrinkage assembly, is squeezed by the heating roller and the conveyor belt, and is heated and pre-shrunk. The textile is heated and pre-shrunk on both sides and then transmitted to the end of the device.

[0047] This Fanming adjustment component can adjust the angles of the pressure roller and the clamping roller of each group of pre-shrinking components. The lifting rod is extended, and the lifting rod drives the sleeve to rise. The two ends of the pressure roller and the clamping roller slide in the sliding hole of the adjustment block. The pressure roller and the clamping roller are lifted at the same time, and the contact area between the conveyor belt and the heating roller is increased, so that the textile can be pre-shrunk in a larger area.

[0048] The beneficial effects of the present invention are:

[0049] The present invention designs a jet chamber structure before pre-shrinking of textiles to pre-wet the surface of the textiles. The jet device has a simple structure and ensures that the textiles can be wetted on all sides at the same time in the jet chamber, the textile wetting process is sufficient, and the wetting rate is fast; at the same time, the jet chamber prevents excessive loss of steam, and the steam injection amount can be reduced to keep the temperature in the jet chamber constant. Steam condensed water can be smoothly discharged from the inner side wall of the chamber, and there is no droplet pollution to the textile surface.

[0050] During the preshrinking process of the textile, the present invention performs a forward and backward folding process on the textile, and simultaneously performs forward and backward heating preshrinking on the textile, thereby ensuring the effect of the preshrinking process and enhancing the toughness of the textile; the pressure roller and the clamping roller are provided with an adjustment component structure, which can change the contact area between the conveyor belt and the heating roller, effectively adjust the preshrinking time of the textile, and can accurately control the moisture content of the textile after preshrinking.

Claims

1. A special preshrinking device for textile printing pretreatment, characterized in that: It includes a front frame, a front fixed roller, a front roller connecting piece, an air jet chamber, a pre-treatment roller, an air intake pipe, a rear frame, a rear fixed roller, a rear roller connecting piece, a pre-shrinking component, and an adjusting component; The front frame is arranged at one end of the jet chamber and is symmetrically arranged, and each of the front frames is fixedly connected to the outer shell at one end of the jet chamber; the number of the front fixed rollers is two, which are divided into an upper front roller and a lower front roller, and the upper front roller and the lower front roller are symmetrically arranged up and down, and the lower front roller is arranged between the front frames, and the two ends of the lower front roller are rotated with the front frames on both sides through bearings; the number of the front roller connecting members is two, and each of the front roller connecting members is symmetrically arranged at the top of the front frames on both sides, and the front roller connecting members are fixed to the front frames through fasteners, and the upper front roller is arranged between the front roller connecting members on both sides, and the two ends of the upper front roller are rotated with the front roller connecting members on both sides through bearings; The jet chamber is a hollow structure, and the centers of the two ends of the jet chamber are through-hole structures to form an opening of the jet chamber; a guide roller is arranged in the opening of the jet chamber, and the two ends of the guide roller are rotated by bearings and the side walls of the two ends of the jet chamber opening; the pretreatment roller is transversely arranged in the jet chamber, and the two ends of the pretreatment roller are rotated by bearings and the side walls of the jet chamber; A drain pipe is provided at the bottom of the jet chamber; the air inlet pipe is transversely arranged at the top of the jet chamber, the air inlet pipe is fixedly connected to the jet chamber by a fastener, a nozzle is provided at the bottom of the air inlet pipe, and the nozzle is vertically connected to the air inlet pipe; The rear frame is arranged at one end of the jet chamber and is symmetrically arranged, and each of the rear frames is fixedly connected to the outer shell at one end of the jet chamber; the number of the rear fixed rollers is two, which are divided into an upper rear roller and a lower rear roller, and the upper rear roller and the lower rear roller are symmetrically arranged up and down, and the lower rear roller is arranged between the rear frames, and the two ends of the lower rear roller are rotated with one end of the rear frames on both sides through bearings; the number of the rear roller connecting members is two, and each of the rear roller connecting members is symmetrically arranged on the top surface of one end of the rear frames on both sides, and the rear roller connection is fixed to the rear frame through fasteners, and the upper rear roller is placed between the rear roller connecting members on both sides, and the two ends of the upper rear roller are rotated with the rear roller connecting members on both sides through bearings; The number of the pre-shrinkage components is two, each of which is arranged at one end of the rear frame, and the two pre-shrinkage components are arranged in a positive and negative staggered manner; each of the pre-shrinkage components comprises a support frame, a pressure roller, a clamping roller, a conveying roller, a conveyor belt, a heating roller connecting piece and a heating roller, the support frame is arranged on one side of the rear frame and is symmetrically arranged, and each of the support frames is fixedly connected to the rear frame; the pressure roller is arranged at the bottom end of one side of the support frame, and the pressure roller rotates with the rear frames on both sides through a bearing; the clamping roller is arranged at the bottom end of the other side of the support frame, and the clamping roller rotates with the rear frames on both sides through a bearing; the conveying roller is arranged at the top of the support frame, and the conveying roller rotates with the support frames on both sides through a bearing; the conveyor belt is wrapped around the outside of the pressure roller, the clamping roller and the conveying roller, the heating roller connecting piece is arranged on one side of the rear frame, and is arranged opposite to the support frame, the heating roller connecting piece is fixed to the rear frame through a fastener, and the heating roller is arranged between the heating roller connecting pieces on both sides, and rotates with the heating roller connecting piece through a bearing; The adjustment assembly comprises an adjustment block, a telescopic rod and a sleeve, and the adjustment assembly is arranged on both sides of one of the pre-shrinkage assemblies; the adjustment block is arranged on the rear frame surface and is fixedly connected to the rear frame; the center of the adjustment block is a hollow structure, forming an adjustment block slide hole; the telescopic rod is arranged on one side of the support frame and is fixedly connected to the support frame through a fastener; the sleeve is arranged at the top of the telescopic rod, and the sleeve is vertically fixedly connected to the telescopic rod; both ends of the pressure roller and the clamping roller of one of the pre-shrinkage assemblies extend out of the adjustment block slide hole, and are respectively rotated with the sleeves on both sides through bearings; The center setting height of the pretreatment roller is higher than the center setting height of the guide rollers on both sides; the outer circumferential direction of the pretreatment roller is a convex structure, forming a pretreatment roller convex block, the cross section of each pretreatment roller convex block is a trapezoidal structure with a narrow top and a wide bottom, and the top surface of each pretreatment roller convex block is an arc-shaped structure; The steam passes through the air inlet pipe and is ejected from the nozzle to the upper surface of the textile. The steam enters the gap between the pretreatment roller protrusion and the textile from both sides to wet the lower surface of the textile. The cross section of the jet chamber is in a hexagonal shape, with a structure that is wide in the middle and narrow at the top and bottom.

2. A special preshrinking device for textile printing pretreatment according to claim 1, characterized in that: The jet chamber openings on both sides are symmetrically arranged, each jet chamber opening is a rectangular structure, and the length of the jet chamber opening is consistent with the width of the front fixed roller.

3. A special preshrinking device for textile printing pretreatment according to claim 2, characterized in that: A water collecting plate is provided in the opening of the jet chamber. The water collecting plate is transversely arranged at the top of the jet chamber opening and is fixedly connected to the inside of the jet chamber to form an integrated structure. The cross-section of the water collecting plate is an "L"-shaped structure. The water collecting plate and the inner wall of the jet chamber are grooved to form a water collecting trough.

4. A special preshrinking device for textile printing pretreatment according to claim 1, characterized in that: The rear frame is in a trapezoidal structure.

5. The special preshrinking equipment for textile printing pretreatment according to claim 1, characterized in that: The adjustment blocks arranged on the rear frame on each side are arranged in a relatively oblique direction; and each telescopic rod is arranged in the same direction corresponding to each adjustment block.

6. A special preshrinking device for textile printing pretreatment according to claims 1 and 5, characterized in that: The telescopic rod is selected from a pneumatic telescopic rod or an electric push rod.

7. The special preshrinking equipment for textile printing pretreatment according to claim 1, characterized in that: The fastener is one or more of a throat clamp, a rivet, an expansion screw, a bolt, a nut, and a screw.

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