CN219951444U - A chain mechanism and double-deck tentering setting machine for double-deck tentering setting machine - Google Patents

Abstract

The utility model belongs to the technical field of textiles, and discloses a chain mechanism for a double-layer tentering setting machine and the double-layer tentering setting machine adopting the chain mechanism. The chain mechanism has the advantages of less parts, low equipment cost, small friction resistance of a conveying system and low energy consumption of a driving motor.

Description

A chain mechanism and double-deck tentering setting machine for double-deck tentering setting machine

Technical Field

The utility model belongs to the technical field of textile, relates to a subsequent processing technology of cloth, and in particular relates to equipment for shaping the cloth.

Background

The tentering setting machine is used for stretching cloth and heating and setting the cloth, and the basic working principle is that the cloth is clamped on a conveying chain, the cloth is conveyed into a drying oven (a heat setting chamber) through the conveying chain, a heating system for heating the cloth is arranged in the drying oven, and after the cloth is heated and set in the drying oven, the cloth is conveyed out of the drying oven through the conveying chain.

Because cloth heating and shaping needs a certain time, under the premise of ensuring that the residence time of the cloth in the oven is long enough, the oven is required to have a longer length (the common single-layer tentering and shaping length is generally about 30 meters) in order to improve the working efficiency of the shaping machine (ensure the conveying speed of the chain), and a larger occupied area is necessarily required.

The patent application with publication number CN111270459A discloses a double-layer tenter setting machine. The tentering setting machine of the stacked double-layer oven can have shorter equipment length under the same conveying distance, so that the occupation of transverse space is effectively saved, but the whole height of the equipment is increased by times, and more longitudinal space is required to be occupied. In addition, in order to realize cloth feeding, double-layer conveying and cloth feeding functions of cloth, the chain mechanism structure of the patent application is complex: in total, 6 chain wheels are adopted, and the non-functional connecting section in the auxiliary path accounts for more than half of the rotation angle 5 of more than 90 degrees (including 90 degrees) in the chain motion path.

The compact tentering setting machine disclosed in the patent application with the publication number of CN112458676A adopts a mode of arranging a double-layer conveying track in a single-layer oven, so that the overall height of the equipment is effectively reduced. However, the structure of the chain conveying track is more complicated, a traditional chain moving horizontally is adopted, and a cloth feeding device is additionally arranged between the upper layer cloth conveying path and the lower layer cloth conveying path to form a continuous cloth conveying path.

Disclosure of Invention

The utility model aims to solve the technical problem that the chain mechanism of the existing double-layer tentering setting machine is complex in structure, and aims to provide a chain mechanism solution with a relatively simplified structure and a corresponding double-layer tentering setting machine.

In order to solve the technical problems, the utility model firstly proposes: the utility model provides a chain mechanism for double-deck tentering setting machine, two sets of combination use side by side for with cloth from the heat setting room of preceding back afferent heat setting room again from the back to the back efferent, chain mechanism includes a closed conveying chain, sets up in the first sprocket of front end, sets up in the second sprocket and auxiliary sprocket of rear end, a plurality of tracks of support chain, its characterized in that, the motion route of conveying chain comprises from the upper path of forward backward motion and the lower floor path of backward forward motion, and the front and back both ends of upper path are walked around the sprocket downwards respectively and are connected with the front and back both ends of lower floor path.

The upper layer path comprises an upper cloth section arranged outside the heat setting chamber and an upper layer setting section arranged inside the heat setting chamber, and the lower layer path comprises a lower cloth section arranged outside the heat setting chamber and a lower layer setting section arranged inside the heat setting chamber. The upper layer shaping section and the lower layer shaping section are mutually parallel, the diameter of the first sprocket and the second sprocket is smaller than the distance between the upper layer shaping section and the lower layer shaping section, a smooth corner is formed at the rear end of the upper layer shaping section or the rear end of the lower layer shaping section, and the auxiliary sprocket is arranged at the corner.

The chain mechanism forms a closed path with cloth feeding, cloth discharging and double-layer conveying functions through 3 chain wheels and more than 90-degree corners. Not only the whole structure is relatively simple, but also has the following advantages: 1. the number of the chain wheels is small, the movement resistance formed by the meshing friction between the chain wheels and the chain is effectively reduced, no outward rotation angle exists in the path, the sum of all rotation angles is equal to 360 degrees, the movement resistance formed by the rotation of the chain is reduced to the minimum, and the energy consumption of the driving motor can be effectively reduced due to the relatively low movement resistance. 2. The number of nonfunctional connecting sections in the path is small and close to zero, so that the chain length is saved, and the equipment cost is saved. 3. The single-layer heat setting chamber is beneficial to heat concentration, reduces heat loss, can effectively reduce the requirement on hot air quantity, and further saves energy. On the other hand, the height of the heat setting chamber is also effectively reduced. 4. There is not the sprocket setting between upper cloth section and the upper setting section, can borrow one section upper setting section to realize bigger tentering width.

Based on fixed cloth needs, be equipped with the fixed establishment who is used for fixed cloth on the conveying chain, fixed establishment prefers common faller, cloth gripper, or the combination of both.

Further, the distance between the upper shaping section and the lower shaping section is smaller than the sum of the diameter of the second sprocket and the diameter of the auxiliary sprocket.

Alternatively, the upper cloth section is connected with the upper shaping section in a horizontal straight line. The lower cloth section is provided with a smooth corner, and an arc-shaped guide rail is arranged at the corner. The position of the corner can be selected at the rear end of the lower cloth section, namely, the corner is formed between the lower cloth section and the lower layer shaping section, or the front of the lower cloth point is selected. Or, lower cloth section and lower floor's design section level straight line connection are equipped with slick and sly corner on the cloth section, and the corner sets up the arc guide rail, and arbitrary position on the cloth section can be selected to the position of corner, and the cloth section rear end is gone up in the preference, and the corner is minimum like this.

Because the upper cloth section has a tentering function, the tension of the chain subjected to cloth is larger than that of the lower cloth section, and the corner is arranged at the lower cloth section, so that the system movement resistance is reduced.

Alternatively, the upper cloth section and the lower cloth section are respectively provided with a smooth corner, and the corner is provided with an arc-shaped guide rail. The corner position on the lower cloth section can select the rear end of the lower cloth section or the front of the lower cloth point. The corner position on the upper cloth section can be any position on the upper cloth section, and the rear end of the upper cloth section is preferred, so that the corner is minimum.

Further, the auxiliary sprocket diameter is smaller than the second sprocket diameter.

Further, the lower end of the second chain wheel is flush with the lower shaping section, and a corner is formed at the rear end of the upper shaping section; or the upper end of the second chain wheel is flush with the upper shaping section, and the corner is formed at the rear end of the lower shaping section.

The utility model further proposes: the double-layer tentering setting machine comprises cloth feeding area equipment, a heat setting system and cloth discharging area equipment, wherein the heat setting system comprises a heat setting chamber for heating and setting cloth and a cloth conveying system for conveying the cloth into the heat setting chamber from the outside and then out of the heat setting chamber. The cloth conveying system comprises two sets of chain mechanisms which are arranged side by side and synchronously move, and a power device (such as a motor) for driving the chain mechanisms to move.

Further, the heat setting system is arranged on a suspension frame body, and the cloth feeding area equipment is arranged in front of the heat setting system. And the cloth feeding area equipment is arranged in a floor mode. The cloth outlet area equipment is arranged below the front end of the chain mechanism, and is arranged in a falling mode.

In view of the high height of the standard factory building, in order to fully utilize the longitudinal space, the heat setting system is arranged overhead, the space below the heat setting system is convenient for users to utilize (store materials and the like), and compared with the mode of constructing a storage grid above a machine, the space utilization mode is free from moving materials up and down, and is convenient for placing the materials. Meanwhile, cloth feeding area equipment and cloth discharging area equipment related to cloth conveying are arranged in a falling mode, loading of cloth before shaping and transferring of the shaped cloth are facilitated.

Further, a suspended platform is disposed about the heat setting system. A stair is arranged between the suspended platform and the ground.

Further, an operation table for operating the start and stop of the machine is arranged at the front end of the chain mechanism, and an operation platform is arranged at the bottom of the front side of the operation table. Cloth guided out from the cloth feeding area equipment passes through the lower part of the operation platform and then extends to an upper cloth point.

Further, the stair is arranged between the cloth feeding area equipment and the heat setting system, and the upper end of the stair is connected with the operation platform.

Preferably, one of the first sprocket and the second sprocket is a drive sprocket, the mounting shaft of which is connected to the motor.

Regarding the arrangement of the power device, the mounting shafts of the driving chain wheels of the two sets of chain mechanisms can be connected through a coaxial device, and then one driving motor is adopted for driving, or two driving motors can be adopted for respectively driving the driving chain wheels of the two sets of chain mechanisms. The drive sprocket may be a first sprocket or a second sprocket. When the second sprocket is selected as the driving sprocket, the motor cannot be disposed in the heat setting chamber, and therefore, the motor is divided into two cases according to the disposed position of the second sprocket. First case: the second sprocket is arranged in the heat setting chamber, and optionally, the second sprocket mounting shaft is extended to penetrate out of the heat setting chamber and then connected with the driving motor, or the second sprocket mounting shaft is connected with the driving motor by a connecting shaft which transversely penetrates out of the heat setting chamber. Second case: the second sprocket is arranged outside the heat setting chamber, and the second sprocket mounting shaft is connected with the driving motor in a conventional manner. The second case has the advantages of convenient connection between the motor and the chain wheel, and the disadvantage of needing to arrange an upper passageway and a lower passageway for the chain to pass through on the rear end wall of the heat setting chamber, so that heat can be dissipated from the passageway.

Further, the heat setting chamber is provided with a hot air system and a dehumidifying system.

The hot air system comprises a heater, an air inlet pipeline, a hot air fan, an air outlet pipeline and a terminal air pipe, wherein the heater is provided with an inlet end of the air inlet pipeline, an outlet end of the air inlet pipeline is connected with an air inlet of the fan, the air outlet pipeline is connected with the terminal air pipe and an air outlet of the hot air fan, and a hot air outlet towards cloth is arranged on the terminal air pipe.

The moisture removal system comprises a moisture removal port arranged at the top of the heat setting chamber, a moisture removal fan and a moisture removal pipeline connected with the moisture removal port and the moisture removal fan.

Further, the heat setting chamber is arranged into a unit combination structure and is formed by connecting a plurality of oven units back and forth, and the multi-layer setting section of the cloth conveying system sequentially passes through the upper parts of the oven units. A moisture discharging port is arranged at the top of each oven unit.

Each oven unit is provided with a set of hot air system, in the set of hot air system, the air inlet pipeline is transversely arranged at the lower part of the oven unit, the inlet end of the air inlet pipeline is positioned at the first side of the oven unit, the outlet end of the air inlet pipeline is positioned at the second side of the oven unit, the hot air fan is positioned at the outlet end of the air inlet pipeline, the air inlet of the hot air fan faces towards the first side of the oven unit, and the air outlet of the hot air fan faces upwards. The air outlet pipeline is arranged above the hot air blower, the air outlet pipeline is vertically arranged, the lower end of the air outlet pipeline is connected with the air outlet of the hot air blower, and the upper end of the air outlet pipeline is closed. The terminal air pipes are arranged on the upper part of the oven unit in groups, and comprise a plurality of groups which are arranged at intervals up and down, and the terminal air pipes of the plurality of groups are arranged in a penetrating manner with the multi-layer shaping sections of the chain conveying mechanism up and down. The first end of the terminal air pipe is positioned at the second side of the oven unit and connected with the side surface of the air outlet pipe facing the first side of the oven unit, the second end of the terminal air pipe extends to the first side of the oven unit, and the second end of the terminal air pipe is closed.

Further, the cross section of the terminal air pipe gradually decreases from the first end to the second end. The hot air outlets are uniformly arranged along the length direction of the terminal air pipe.

Further, the terminal air pipes comprise four groups, the first group and the second group are arranged above and below the upper shaping section, and the hot air outlets of the first group and the second group of terminal air pipes are arranged on one side of the terminal air pipes facing the upper shaping section. The third group and the fourth group are arranged above and below the lower shaping section, and the hot air outlets of the third group and the fourth group of terminal air pipes are arranged on one side of the terminal air pipes facing the lower shaping section.

Further, regarding the arrangement and structure of the track:

the movement path of the conveying chain comprises a part overlapped with the cloth conveying path and a rest part;

the part overlapped with the cloth conveying path comprises a sprocket winding section and a residual section; in the remaining section of the portion overlapping with the cloth conveying path, the track is not only used for supporting the weight of the chain, but also needs to overcome the transverse tension of the cloth on the chain, so that the track arranged in the section needs a bottom supporting surface and an inner supporting surface; the track only comprises an inner side supporting surface at the part overlapped with the cloth conveying path around the chain wheel section;

the remainder also includes a sprocket winding section and a remainder section; the chain winding wheel section at the rest part does not need to be provided with a track; in the remaining section of the remaining part the rail may only comprise a bottom support surface, or in case the length is not long or there is sufficient natural sagging space below, the rail may not be provided.

The utility model has the beneficial effects that: 1. the number of parts is small, the equipment cost is low, the friction resistance of a conveying system is small, and the energy consumption of a driving motor is low. 2. The two shaping sections are compact in layers, and the energy-saving effect is good. 3. The heat setting chamber has low height, which is beneficial to fully utilizing the longitudinal space.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the tenter setting machine according to the present utility model.

Fig. 2 is a schematic diagram of a heat setting system of the tenter frame setting machine shown in fig. 1.

Fig. 3 is a schematic top view of a heat setting system of the tenter setting machine shown in fig. 1.

Fig. 4 is a simplified schematic diagram of the tenter setting chain mechanism shown in fig. 1.

Fig. 5 is a schematic diagram of a hot air system.

Fig. 6 is a graph of maximum tenter width versus schematic.

Fig. 7 is a simplified schematic diagram of another alternative chain mechanism.

Detailed Description

The structural features of the tenter frame shaping machine according to the present utility model will be further explained by way of example with reference to the accompanying drawings.

The structural scheme of the chain mechanism is changed from the following prototype scheme: the upper layer path and the lower layer path are parallel to each other, and the diameters of the first sprocket and the second sprocket are equal to the distance between the upper layer path and the lower layer path.

Because the air pipe used for blowing hot air to the cloth is required to be arranged between the upper layer shaping section and the lower layer shaping section, the distance between the upper layer shaping section and the lower layer shaping section cannot be smaller than the thickness of the air pipe arranged between the upper layer shaping section and the lower layer shaping section. When the minimum distance between the upper shaping section and the lower shaping section cannot be further reduced due to the limitation of the thickness of the air pipe (for example, the thickness of a double-layer air pipe for blowing air to the upper layer and the lower layer respectively is about 50 cm), the diameters of the first sprocket wheel and the second sprocket wheel can be larger (about 35cm of a common tenter sprocket wheel) by adopting the prototype scheme, so that the requirement on the output torque of a driving motor is increased, and therefore, the utility model adopts the sprocket wheel with the diameter smaller than that between the upper shaping section and the lower shaping section. The upper cloth section and the lower cloth section are arranged between the first sprocket and the upper shaping section and the lower shaping section at intervals, so that the included angles formed between the upper cloth section and the lower cloth section and between the upper shaping section and the lower shaping section are tiny or even not obvious. Therefore, the auxiliary chain wheel is not required to be arranged at the corner, and the guide rail at the corner is required to be arranged in an arc shape. The second chain wheel is directly connected with the rear ends of the upper layer shaping section and the lower layer shaping section, so that a larger corner is formed at the rear end of the upper layer shaping section or the lower layer shaping section when the chain bypasses the second chain wheel, and the auxiliary chain wheel is arranged at the corner in order to avoid overlarge friction force between the chain and the guide rail at the corner and overlarge chain movement resistance.

In view of the fact that the basic function of the tenter setting machine is heat setting, the utility model refers to paths other than the path matched with heat setting (heat setting section) in the motion path of the chain mechanism as auxiliary paths, while the necessary functions to be realized for the chain mechanism are upper cloth, tenter and lower cloth except the matched with heat setting, and the auxiliary paths correspond to the functions of upper cloth, tenter and lower cloth, and the path sections for connecting the upper cloth section, tenter section (more than upper cloth Duan Chongge) and lower cloth section, which are present for forming a closed continuous path, belong to non-functional connecting sections because of path design reasons. The structure of the chain mechanism can be effectively simplified by shortening or canceling the non-functional connecting section through the optimized design of the chain path, and the method is beneficial to reducing the cost of spare parts of the chain mechanism and reducing the running resistance.

Referring to fig. 1-4, there is shown a specific example of a tenter setting machine according to the present utility model, which includes a cloth feeding area device 1, a cloth discharging area device 3, and a heat setting system. The heat setting system comprises a heat setting chamber 2 and a cloth conveying system. The cloth conveying system comprises two sets of chain mechanisms 40 which are arranged side by side and synchronously move, and driving motors 41 which are respectively used for driving the two sets of chain mechanisms to move.

The cloth feeding area equipment 1 is arranged at the forefront end of the machine in a falling way, and the heat setting system is arranged on the suspended adding body 7. The rear half part of the chain mechanism is positioned in the heat setting chamber, and the front end of the chain mechanism penetrates out of the front end of the heat setting chamber. The cloth outlet area device 3 is arranged below the front end of the chain mechanism in a falling way. A suspended platform 71 for an operator to walk and stand is provided around the heat setting system. A stair 72 is provided between the suspended platform and the ground. An operation table 73 for operating the machine is provided at the front end of the chain mechanism, and an operation table 74 is provided at the bottom of the front side of the operation table 73. The cloth 8 drawn out from the cloth feeding section apparatus passes below the operation station 74 and then extends to an upper cloth position. The stairs 72 are arranged between the cloth feeding area equipment 1 and the heat setting system, and the upper ends of the stairs 72 are connected with an operation platform 74.

The chain mechanism 40 comprises a closed chain 401 and 3 sprockets 402, the 3 sprockets comprising: a first sprocket 4021 at the front end of the chain mechanism and a second sprocket 4022 and an auxiliary sprocket 4023 at the rear end of the chain mechanism, respectively, as shown in fig. 3 and 4.

The first sprocket 4021 and the second sprocket 4022 have the same diameter, and the diameter of the auxiliary sprocket 4023 is smaller than the diameter of the second sprocket. The chain 401 extends horizontally and rearwardly from above the first sprocket 4021 into the heat-setting chamber 2 and continues to extend horizontally and rearwardly above the auxiliary sprocket 4023, extends diagonally downward above the second sprocket 4022 after passing a small angle around the auxiliary sprocket 4023, then bypasses the second sprocket 4022 downward and reverses direction, extends horizontally and forwardly from below the second sprocket 4022 out of the heat-setting chamber 2 and continues to extend horizontally and forwardly through the arcuate rail 403 and then upwardly a small angle, then extends slightly obliquely upwardly below the first sprocket 4021 and then upwardly bypasses the first sprocket 4021 and closes.

The upper layer path from above the first sprocket 4021 to above the auxiliary sprocket 4023 can be functionally divided into two segments: an upper cloth section 4011 outside the heat setting chamber and an upper layer setting section 4012 inside the heat setting chamber, wherein an upper cloth point 4010 at the front end of the upper cloth section 4011 is clamped on the chain through an upper cloth device 40101.

A small section of the inclined path from above the auxiliary sprocket 4023 to above the second sprocket 4022 is a non-functional connecting section, but also serves the function of heat setting when the section is in the heat setting chamber.

The lower layer path from below the second sprocket 4022 to below the first sprocket 4021 may also be functionally divided into two segments: a lower shaping section 4013 positioned in the heat shaping chamber and a lower cloth section 4014 positioned outside the heat shaping chamber, wherein a lower cloth point 4015 of the cloth at the rear end of the lower cloth section 4014 is separated from the chain under the action of a cloth separating roller 40151.

The heat setting chamber 2 is composed of a plurality of oven units, a set of hot air system is arranged in each oven unit, and the hot air systems of two adjacent oven units are arranged in opposite directions. A moisture discharging port is arranged at the top of each oven unit, a moisture discharging fan 61 is arranged above the heat setting chamber, and all the moisture discharging ports are connected with the moisture discharging fans 61 through moisture discharging pipelines 62. The moisture discharging port, the moisture discharging pipeline and the moisture discharging fan form a moisture discharging system.

Referring to fig. 5, the hot air system includes: an air inlet pipeline 52 transversely arranged at the lower part of the oven unit, a heater 51 (an electric heater, a gas heater, a medium-pressure steam heater and the like) arranged at the left inlet end of the air inlet pipeline, a hot air fan 53 arranged at the right outlet end of the air inlet pipeline, an air outlet pipeline 54 vertically arranged above the hot air fan and a terminal air pipe 55 transversely arranged at the upper part of the oven unit.

The hot air blower 53 is a centrifugal blower, the air inlet is butted with the outlet end of the air inlet pipeline 52 towards the left, and the air outlet is butted with the lower end of the air outlet pipeline 54 towards the upper. The upper end of the air outlet pipeline 54 is closed, and the left side is connected with the right end of the terminal air pipe 55.

The terminal air pipes 55 are four groups, the first group of terminal air pipes 551 and the second group of terminal air pipes 552 are respectively arranged above and below the lower shaping section 4013, the upper side of the first group of terminal air pipes 551 is provided with a hot air outlet, and the lower side of the second group of terminal air pipes 552 is provided with a hot air outlet. The third set of terminal air pipes 553 and the fourth set of terminal air pipes 554 are respectively arranged above and below the upper layer shaping section 4012, the upper side of the third set of terminal air pipes 553 is provided with a hot air outlet, and the lower side of the fourth set of terminal air pipes 554 is provided with a hot air outlet. The left end of the terminal air pipe 55 is closed, the right end is communicated with the air outlet pipeline 54, and the thickness of the terminal air pipe 55 gradually decreases from the inlet end to the tail end.

Referring to fig. 6, the maximum transverse bending angle of the chain is 6 degrees. The tentering width (width of the cloth which is widened in the shaping process) refers to: the amount of change in the chain pitch, i.e., D-D1 (D1 '), starts from the upper distribution point P1 (P1 ') to the chain bending point P2 (P2 '). As can be seen from the figure, when no sprocket is provided between the upper cloth section located outside the heat setting and the first-layer setting section located in the heat setting chamber, the bending point of the chain can be optionally selected to be located at P2 at the upper cloth Duan Mou or at P2' at a position of the first-layer setting section. When the bending point of the chain is set at a position P2' of the first-layer shaping strand, a larger maximum tentering width D-D1' can be achieved at the same equipment length L, and the equipment length can be reduced by L-L ' at the same maximum tentering width D-D1, compared with the case where the bending point of the chain is set at the upper cloth Duan Mouchu P2.

Referring to fig. 7, the chain mechanism shown in the drawing is basically the same as that shown in fig. 4, except that the first sprocket 4021 is not disposed upward but is disposed centrally, and not only is a corner formed at the junction of the lower cloth leg and the lower shaping leg (the rear end of the lower cloth leg), but also a corner is formed at the junction of the upper cloth leg and the upper shaping leg (the rear end of the upper cloth leg), and both corners are provided with arc-shaped guide rails 403. Through setting up first sprocket in the middle, can share because first sprocket diameter is less than the two-layer design section interval of upper and lower layer and the unavoidable corner that produces with two corners. The angle of rotation can be made even smaller or even negligible.

According to fig. 4 and 7, the cloth conveying scheme of the utility model can realize double-layer shaping by only using one closed chain, two main chain wheels, one auxiliary chain wheel and more than two large rotation angles of 90 degrees. The advantages of this solution are not only a simple structure, a small number of parts and components, a low cost, but also a lower friction resistance against movement due to the fewer sprockets and the number of corners above 90 degrees, which means a lower energy consumption.

Claims (10)

1. The utility model provides a chain mechanism for double-deck tentering setting machine, two sets of combination use side by side for with cloth from the heat setting room of preceding afferent heat setting room of back to the follow heat setting room outgoing, its characterized in that, chain mechanism includes a closed conveying chain, sets up in the first sprocket of front end, sets up in the second sprocket and auxiliary sprocket of rear end, a plurality of sections tracks of support chain, and the motion path of conveying chain comprises the upper path of follow front and back motion and the lower floor's route of follow back forward motion, and the front and back both ends of upper path are walked around the sprocket respectively downwards and are connected with the front and back both ends of lower floor's route, the upper path is including locating the outside upper cloth section of heat setting room and locating the inside upper setting section of heat setting room, the lower floor's route is including locating the outside lower cloth section of heat setting room and locating the inside lower floor setting section, upper setting section and lower floor setting section are parallel to each other, the diameter of first sprocket and second sprocket is less than the interval between upper setting section and the lower floor setting section, and upper setting section or lower floor setting section have the corner setting department after the upper setting section or lower floor setting section has the corner setting.

2. The chain mechanism according to claim 1, wherein the conveying chain is provided with a fixing mechanism for fixing cloth, and the fixing mechanism is a needle plate, a cloth clip or a combination of the two.

3. The chain mechanism as set forth in claim 1, wherein a spacing between the upper and lower shaped sections is less than a sum of the second sprocket diameter and the auxiliary sprocket diameter.

4. The chain mechanism as set forth in claim 1, wherein said upper cloth section is connected with said upper shaping section in a horizontal straight line, said lower cloth section is provided with a rounded corner, said corner is provided with an arc-shaped guide rail, or said lower cloth section is connected with said lower shaping section in a horizontal straight line, said upper cloth section is provided with a rounded corner, and said corner is provided with an arc-shaped guide rail.

5. The chain mechanism as set forth in claim 1, wherein rounded corners are provided on both the upper and lower sections, and arcuate guide rails are provided at the corners.

6. The utility model provides a double-deck tentering forming machine, includes into cloth district equipment, heat setting system, goes out cloth district equipment, heat setting system includes the heat setting room that is used for carrying out the heat setting to the cloth and is used for passing into the heat setting room from outside and follow the cloth conveying system of heat setting room outgoing again, its characterized in that, cloth conveying system includes two sets of side by side and synchronous motion's the chain mechanism of any one of claims 1-5 and the power device of drive chain mechanism motion.

7. The double-deck tentering setting machine according to claim 6, wherein the heat setting system is arranged on a suspended frame body, the cloth feeding area equipment is arranged in front of the heat setting system, the cloth feeding area equipment is arranged in a falling manner, the cloth discharging area equipment is arranged below the front end of the chain mechanism, and the cloth discharging area equipment is arranged in a falling manner.

8. The double-layer tenter setting machine according to claim 6, wherein the heat setting chamber is provided with a hot air system and a moisture removal system;

the hot air system consists of a heater, an air inlet pipeline, a hot air blower, an air outlet pipeline and a terminal air pipe, wherein the heater is provided with an inlet end of the air inlet pipeline, an outlet end of the air inlet pipeline is connected with an air inlet of the blower, the air outlet pipeline is connected with the terminal air pipe and an air outlet of the hot air blower, a hot air outlet facing to cloth is arranged on the terminal air pipe, and the thickness of the terminal air pipe is smaller than the diameter of a steering chain wheel of the shaping section;

the moisture removal system comprises a moisture removal port arranged at the top of the heat setting chamber, a moisture removal fan and a moisture removal pipeline connected with the moisture removal port and the moisture removal fan.

9. The double-layer tentering setting machine according to claim 8, wherein the heat setting chamber is of a unit combination structure and is formed by connecting a plurality of oven units back and forth, the multi-layer setting section of the cloth conveying system sequentially passes through the upper parts of the oven units, and a moisture discharging port is arranged at the top of each oven unit;

each oven unit is provided with a set of hot air system, in the set of hot air system, the air inlet pipeline is transversely arranged at the lower part of the oven unit, the inlet end of the air inlet pipeline is positioned at the first side of the oven unit, the outlet end of the air inlet pipeline is positioned at the second side of the oven unit, the hot air fan is positioned at the outlet end of the air inlet pipeline, the air inlet of the hot air fan faces to the first side of the oven unit, and the air outlet of the hot air fan faces upwards; the air outlet pipeline is arranged above the hot air blower, the air outlet pipeline is vertically arranged, the lower end of the air outlet pipeline is connected with the air outlet of the hot air blower, and the upper end of the air outlet pipeline is closed; the terminal air pipes are arranged at the upper part of the oven unit in groups and comprise a plurality of groups which are arranged at intervals up and down, and the terminal air pipes and the multi-layer shaping sections of the chain conveying mechanism are arranged in an up-and-down penetrating manner; the first end of the terminal air pipe is positioned at the second side of the oven unit and connected with the side surface of the air outlet pipe facing the first side of the oven unit, the second end of the terminal air pipe extends to the first side of the oven unit, and the second end of the terminal air pipe is closed;

the cross section of the terminal air pipe is gradually reduced from the first end to the second end, and the hot air outlets are uniformly arranged along the length direction of the terminal air pipe.

10. The double-deck tentering setting machine according to claim 9, wherein the terminal air pipes include four groups, the first group and the second group are disposed above and below the upper setting section, the hot air outlets of the first group and the second group are disposed at one side thereof facing the first setting section, the third group and the fourth group are disposed above and below the lower setting section, and the hot air outlets of the third group and the fourth group are disposed at one side thereof facing the final setting section.