Drying machine

Abstract

The invention relates to the technical field of cloth drying, in particular to a drying machine which comprises a drying box, a plurality of venturi tuyeres which are distributed on the upper side and the lower side of cloth and arranged in a matrix mode are vertically connected to the drying box in a sliding mode, and the venturi tuyeres blow and dry hot air on the cloth at the proper air volume, position and wind direction through arranged adjusting mechanisms. The drying box is divided into a plurality of independent, short and small drying modules by adopting the wind shields covering the outer sides of the Venturi tuyeres, the positions, the air outlet amount and the air outlet direction of all the Venturi tuyeres are independently adjusted, and therefore targeted uniform drying operation is conducted on areas with different water contents on cloth; the wind shield is adopted for shielding and controlling hot air blown out of the Venturi tuyere, the dissipation speed of the hot air is effectively reduced, and therefore high air supply amount and high hot air temperature do not need to be maintained all the time, and energy consumption and production cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of fabric drying technology, specifically a dryer. Background Technology

[0002] In the fabric production process, drying is one of the key steps to ensure the quality and performance of the finished product. Through effective drying treatment, the residual moisture in the fabric during previous processes such as dyeing and finishing can be removed, so that it reaches the specified moisture content standard. At present, common drying equipment includes drum dryers, hot air tenter frame machines, etc.

[0003] The tenter frame dryer has several Venturi nozzles arranged in a matrix inside the drying chamber, which are located on the upper and lower sides of the fabric. During operation, hot air is blown vertically onto the upper and lower surfaces of the fabric through the Venturi nozzles. Forced convection is used to uniformly and centrally heat the fabric, thereby achieving overall drying of the fabric.

[0004] However, since the fabric often has uneven moisture content distribution before entering the dryer, the traditional fixed position and fixed air volume Venturi nozzles are difficult to dynamically adjust according to the actual humidity of each area of ​​the fabric. This may result in insufficient drying of wetter areas and over-drying of drier areas, affecting the overall consistency of fabric quality.

[0005] In addition, after the high-speed vertical airflow impacts the fabric, it will quickly dissipate laterally along the fabric surface, resulting in some of the hot air energy not being fully utilized before being discharged outside the chamber. The heat exchange efficiency is low. Therefore, in order to achieve the required drying effect, it is usually necessary to maintain a high air volume and hot air temperature, which causes the equipment energy consumption to remain at a high level for a long time, increasing production costs.

[0006] In summary, there is an urgent need for a dryer that can be modularly configured and can independently and dynamically adjust the flow rate, position, and direction of the Venturi nozzles according to the moisture content of the fabric. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a dryer, including a drying box, on which a plurality of Venturi nozzles are vertically slidably connected, distributed on the upper and lower sides of the fabric and arranged in a matrix, and the Venturi nozzles blow hot air onto the fabric with a suitable air volume, position and direction through a set adjustment mechanism.

[0008] The regulating mechanism includes an electrically adjustable valve connected to the Venturi nozzle and in communication with the air supply device. The Venturi nozzle is equipped with a drive assembly. A wind deflector is slidably connected to the outside of the Venturi nozzle. The wind deflector divides the drying chamber into multiple independent and short drying modules. Several grid plates are rotatably arranged at equal intervals on the lower side of the wind deflector. A humidity sensor is fixedly installed inside the wind deflector.

[0009] During drying, the humidity sensor monitors and feeds back the hot air humidity data to the host computer in real time, which in turn controls the Venturi nozzle to move up and down through the drive component and controls the electronic control valve to adjust the air volume of the Venturi nozzle. At the same time, the Venturi nozzle drives the grid plate to rotate and adjust the air outlet direction through the set linkage component.

[0010] By independently adjusting the position, air volume, and air direction of the nozzles in each drying module, targeted and uniform drying operations can be carried out on areas of the fabric with different moisture contents.

[0011] Preferably, the windshield consists of a vertical section on the left and an inclined section on the right. When the fabric moves, it first passes through the humidity sensor in the inclined section of the windshield, and then through the Venturi nozzle in the vertical section of the windshield.

[0012] Preferably, the air inlet of the electric regulating valve is connected to the air supply device through an air inlet hose, and the end of the inclined section of the wind deflector away from the fabric is connected to the dehumidification device and the air supply device through an exhaust hose, thereby forming an energy-saving circulating heat delivery circuit.

[0013] Preferably, the drive assembly includes a bracket plate fixedly mounted on a venturi nozzle, a hydraulic cylinder is fixedly mounted on the bracket plate, and the telescopic section of the hydraulic cylinder is fixedly connected to the drying chamber.

[0014] Preferably, the linkage assembly includes a linkage frame fixedly installed on the venturi nozzle, a connecting plate hinged to the front side of the linkage frame, and a swing plate fixedly installed on the front side of a grille on the same windshield, the swing plate being hinged to the connecting plate.

[0015] Preferably, a synchronization plate is fixedly installed at the rear end of the grid plate, the synchronization plates on the same windshield are arranged in parallel to each other, and the ends of the synchronization plates on the same windshield are hinged together with a linkage plate.

[0016] Preferably, the tilt angle of the grille on the same windshield gradually increases from left to right, and the tilted grille guides the hot air to the right.

[0017] Preferably, a plurality of the windshields located on one side of the fabric and arranged in a matrix are connected together to a plate frame that can slide up and down along the drying box, and a hydraulic cylinder with a telescopic section fixedly connected to the drying box is fixedly installed on the plate frame.

[0018] Preferably, the Venturi nozzles on the same side of the fabric are arranged in multiple columns along the left-right direction, and each column is staggered from the other in the front-back direction, so that the air outlet area of ​​all the Venturi nozzles on the same side covers the entire width of the fabric.

[0019] Preferably, the Venturi nozzles located on the upper side of the fabric and the Venturi nozzles located on the lower side of the fabric are arranged in a staggered manner to avoid the upper and lower sides of the fabric at the same location being dried at the same time.

[0020] The beneficial effects of the present invention are as follows: First, the present invention uses a windproof cover installed on the outside of the Venturi nozzle to divide the drying box into multiple independent and short drying modules. By using the humidity data fed back by the humidity sensor in each windproof cover, the position, air volume and air direction of each Venturi nozzle are adjusted independently in real time by the host computer, so as to carry out targeted and uniform drying operations on areas with different moisture contents on the fabric, ensuring the overall quality consistency of the fabric.

[0021] Second, the present invention uses a wind deflector to block and control the hot air blown out by the venturi nozzle, which effectively slows down the dissipation speed of the hot air, prolongs the contact time between the hot air and the fabric, and improves the heat exchange rate. Therefore, it is not necessary to maintain a high air volume and hot air temperature at all times, thus reducing energy consumption and production costs.

[0022] Third, this invention uses data from a humidity sensor to adjust the position of the Venturi nozzle in real time by driving the component. When the Venturi nozzle is close to the high moisture content area of ​​the fabric, the airflow attenuation is small, the impact velocity is high, and the penetration is strong, which can effectively break the high humidity boundary layer on the fabric surface and enhance the driving force for moisture evaporation. When the Venturi nozzle is far away from the low moisture content area of ​​the fabric, the airflow diffuses, the velocity and impact pressure are reduced, and the heating intensity of the hot air on the fabric is weakened, avoiding over-drying.

[0023] Fourth, this invention employs a linkage component to drive the grid plate to rotate synchronously when adjusting the position of the Venturi nozzle, thereby simultaneously adjusting the angle of hot air incident on the fabric. This achieves vertical incident airflow into high moisture content areas, allowing the airflow to impact the fabric surface vertically with maximum momentum, effectively penetrating the fabric gaps, strongly disturbing the fabric boundary layer, and maximizing the heat and mass transfer efficiency between the hot air and the fabric. For low moisture content areas, the airflow is incident at an angle, causing the airflow to flow tangentially along the fabric surface, reducing the vertical velocity component of the airflow, weakening the impact force, and prolonging the contact time between the airflow and the fabric surface. This gently heats the fabric, promotes thermal and moisture balance, and improves the consistency of drying. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a top view of the drying oven, venturi nozzle, hydraulic cylinder 2, and plate frame in this invention.

[0027] Figure 3 This is a partial cross-sectional view of the drying oven, windshield, venturi nozzle, and electric regulating valve in this invention.

[0028] Figure 4 This is a schematic diagram of the structure of the plate frame, hydraulic cylinder 2, windshield and grid plate in this invention.

[0029] Figure 5 This is a partial cross-sectional view of the drying oven, venturi nozzle, electric regulating valve, and hydraulic cylinder in this invention.

[0030] Figure 6 This is a schematic diagram of the structure of the windshield, grille, synchronization plate and linkage plate in this invention.

[0031] Figure 7 This is a partial cross-sectional view of the windshield, grille, humidity sensor, and venturi nozzle in this invention.

[0032] Figure 8 This is a cross-sectional view of the fabric drying process using the Chinese-made Qiuli nozzle in the low moisture content area.

[0033] Figure 9 This is a cross-sectional view of the Chinese version of the invention, showing the use of a Querce air nozzle to dry fabric in areas with high moisture content.

[0034] In the diagram: 1. Drying oven; 2. Venturi nozzle; 3. Adjustment mechanism; 31. Electrically adjustable valve; 32. Drive assembly; 33. Wind deflector; 34. Grille; 35. Humidity sensor; 36. Linkage assembly; 321. Support plate; 322. Hydraulic cylinder one; 331. Plate frame; 332. Hydraulic cylinder two; 361. Linkage frame; 362. Connecting plate; 363. Swing plate; 364. Synchronization plate; 365. Linkage plate. Detailed Implementation

[0035] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0036] See Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7 A dryer includes a drying chamber 1. Several Venturi nozzles 2 are vertically slidably connected to the drying chamber 1 and are arranged in a matrix on the upper and lower sides of the fabric. The Venturi nozzles 2 blow hot air onto the fabric with a suitable air volume, position and direction through an adjustment mechanism 3, thereby performing targeted and uniform drying operations on areas of the fabric with different moisture contents.

[0037] See Figure 1 , Figure 3 , Figure 4 and Figure 5The regulating mechanism 3 includes an electrically adjustable valve 31 connected to the Venturi nozzle 2 and connected to the air supply device. A wind deflector 33 is slidably connected to the outside of the Venturi nozzle 2. The wind deflector 33 divides the drying chamber 1 into multiple independent and short drying modules. The wind deflector 33 consists of a vertical section on the left and an inclined section on the right. The air inlet of the electrically adjustable valve 31 is connected to the air supply device through an air inlet hose. The end of the inclined section of the wind deflector 33 away from the fabric is connected to the dehumidification device and the air supply device through an exhaust hose, thereby forming an energy-saving circulating heat delivery loop.

[0038] It is worth noting that the electric regulating valve 31 is a valve available on the market that can perform high-precision automatic control of the flow rate of high-temperature air. Such valves have precise flow control, fast response to control signals, and can withstand high temperatures. In addition, the air inlet hose and air outlet hose in this embodiment are both made of high-temperature resistant stainless steel hoses. The dehumidification device and air supply device adopt the circulating air supply heating system commonly used in the prior art, which will not be described in detail in this embodiment.

[0039] See Figure 3 , Figure 6 and Figure 7 A humidity sensor 35 is fixedly installed inside the wind deflector 33. The wind deflector 33 is close to the fabric but does not contact the fabric, so that the wind deflector 33 can effectively block the escape of hot air inside. When the fabric is continuously moved into the drying chamber 1 for drying, the fabric first passes through the humidity sensor 35 in the inclined section of the wind deflector 33, and then passes through the Venturi nozzle 2 in the vertical section of the wind deflector 33.

[0040] The hot airflow from the Venturi nozzle 2 is blown along the vertical section of the wind deflector 33 onto the fabric surface. As the hot air diffuses radially along the fabric surface, it is blocked and controlled by the wind deflector 33, thereby effectively slowing down the dissipation speed of the hot air, prolonging the contact time between the hot air and the fabric, and improving the heat exchange rate. This eliminates the need to maintain a high airflow and hot air temperature at all times, reducing energy consumption and production costs. As a result, moisture on the fabric surface evaporates into the hot air, increasing the humidity of the hot air.

[0041] Then, the steam in the hot air moves into the inclined section of the wind deflector 33 under the action of the airflow, and is discharged from the inclined section of the wind deflector 33 after being monitored by the humidity sensor 35. The humidity sensor 35 feeds back the hot air humidity data to the host computer in real time, so that the host computer controls the electronic regulating valve 31 to adjust the air volume of the Venturi nozzle 2. When the humidity sensor 35 detects that the hot air humidity is low, the host computer judges that the moisture content of the fabric in that area is low, and then controls the electronic regulating valve 31 to reduce the air volume of the Venturi nozzle 2 to avoid over-drying; at the same time, when the humidity sensor 35 detects that the hot air humidity is high, the air volume of the Venturi nozzle 2 is increased to avoid under-drying.

[0042] It should be noted that the humidity sensor 35 uses a high-precision, high-temperature resistant sensor available on the market, which can sensitively monitor the high-temperature steam in the hot air and provide high-precision feedback of humidity data. The host computer can adjust the flow rate of the electronic control valve 31 with a suitable delay according to the moving speed of the fabric, so as to ensure the accurate alignment and drying of the Venturi nozzle 2.

[0043] See Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 and Figure 9 The Venturi nozzle 2 is equipped with a drive assembly 32, which controls the Venturi nozzle 2 to move up and down. The drive assembly 32 includes a bracket plate 321 fixedly installed on the Venturi nozzle 2. A hydraulic cylinder 322 is fixedly installed on the bracket plate 321. The telescopic section of the hydraulic cylinder 322 is fixedly connected to the drying box 1.

[0044] While controlling the electronic control valve 31 based on the humidity data fed back by the humidity sensor 35 and the fabric movement speed, the host computer also controls the extension and retraction of the extension section of the hydraulic cylinder 322. This causes the hydraulic cylinder 322 to drive the Venturi nozzle 2 to adjust its position up and down through the bracket plate 321. When the air volume of the Venturi nozzle 2 increases, the Venturi nozzle 2 moves closer to the fabric, bringing it closer to the high moisture content area of ​​the fabric. At this time, the airflow attenuation is small, the impact speed is high, and the penetration is strong, which can effectively break the high humidity boundary layer on the fabric surface and enhance the driving force for moisture evaporation.

[0045] When the air volume of the Venturi nozzle 2 decreases, the Venturi nozzle 2 moves away from the fabric, causing the Venturi nozzle 2 to move away from the low moisture content area of ​​the fabric. At this time, the airflow diffuses, the speed and impact pressure decrease, and the heating intensity of the hot air on the fabric weakens, thus avoiding over-drying.

[0046] See Figure 3 , Figure 4 , Figure 5 , Figure 8 and Figure 9 A number of grid plates 34 are rotatably arranged at equal intervals on the lower side of the windshield 33. The Venturi nozzle 2 drives the grid plates 34 to rotate through the linkage component 36 to adjust the air outlet direction. The linkage component 36 includes a linkage frame 361 fixedly installed on the Venturi nozzle 2. A connecting plate 362 is hinged to the front side of the linkage frame 361. A swing plate 363 is fixedly installed on the front side of one of the grid plates 34 on the same windshield 33. The swing plate 363 is hinged to the connecting plate 362. When the Venturi nozzle 2 moves up and down relative to the windshield 33 at that position, the Venturi nozzle 2 drives the corresponding grid plate 34 to rotate through the transmission of the linkage frame 361, the connecting plate 362, and the swing plate 363.

[0047] See Figure 5 , Figure 6 , Figure 8 and Figure 9 A synchronization plate 364 is fixedly installed at the rear end of the grille 34. The synchronization plates 364 on the same windshield 33 are arranged in parallel to each other. The ends of the synchronization plates 364 on the same windshield 33 are hinged to a linkage plate 365. When one grille 34 on the same windshield 33 rotates, the grille 34 will push the linkage plate 365 through the synchronization plate 364 on it. The linkage plate 365 will then drive the corresponding grille 34 to rotate by pushing the other synchronization plates 364. Therefore, the above structural design enables the grilles 34 on the same windshield 33 to rotate synchronously, at the same angle, and in the same direction.

[0048] When the Venturi nozzle 2 moves closer to the fabric, it drives the grid plate 34 to rotate clockwise, which gradually reduces the tilt of the grid plate 34, thereby gradually reducing the change in the direction of the hot air. This allows the hot airflow to impact the fabric surface in the high moisture content area with high momentum, effectively penetrate the fabric gaps, strongly disturb the fabric boundary layer, and maximize the heat and mass transfer efficiency between the hot air and the fabric.

[0049] As the Venturi nozzle 2 moves away from the fabric, it drives the grid plate 34 to rotate counterclockwise, gradually increasing the inclination of the grid plate 34. This gradually enhances the change in the direction of the hot air, reduces the vertical velocity of the airflow, and directs the airflow at an angle to the low moisture content area. This causes the airflow to flow tangentially along the fabric surface, reducing the impact force and prolonging the contact time between the airflow and the fabric surface. This, in turn, gently heats the fabric, promotes thermal and moisture balance, and improves the consistency of drying.

[0050] To achieve a gradient change in airflow impact force within each wind deflector 33, and to preheat the fabric heating zone on the right side of the Venturi nozzle 2, the present invention designs the following structure: (See attached diagram) Figure 7 , Figure 8 and Figure 9 The tilt angle of the grid plate 34 on the same wind deflector 33 gradually increases from left to right. After tilting, the grid plate 34 guides the hot air to the right. The fabric enters the wind deflector 33 from right to left, so that the direction of airflow impact on the fabric during the movement gradually approaches vertical, thereby forming a continuous gradient heating field for the fabric. This simulates the heat input curve required for an ideal drying process, avoids thermal shock to the fabric, and improves the drying effect.

[0051] To meet the need for general heating of special fabrics, this invention designs the following structure: (See attached diagram) Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 9Several wind deflectors 33 located on one side of the fabric and arranged in a matrix are connected to a plate frame 331 that can slide up and down along the drying chamber 1. A hydraulic cylinder 332 with a telescopic section fixedly connected to the drying chamber 1 is fixedly installed on the plate frame 331. When special fabrics need to be heated in a normal way, the Venturi nozzle 2 is moved to the maximum position away from the fabric. Then, the telescopic section of the hydraulic cylinder 332 extends and drives all the wind deflectors 33 away from the fabric through the plate frame 331, so that the wind deflectors 33 no longer block the hot air escaping from the surface of the fabric. At this time, the Venturi nozzle 2 delivers air to the fabric in a unified and concentrated manner to heat it, thereby achieving the overall drying of the fabric.

[0052] Furthermore, when both the Venturi nozzle 2 and the wind deflector 33 are close to the fabric, and when both the Venturi nozzle 2 and the wind deflector 33 are far from the fabric, the tilt angle of the grid plate 34 is the same, which is the state of minimum tilt. Therefore, the hot airflow blown out by the Venturi nozzle 2 can directly pass through the grid plate 34 and be injected vertically into the fabric, thereby drying the fabric in a traditional way.

[0053] To ensure thorough drying of the fabric surface without any blind spots, this invention incorporates the following structure: (See attached diagram) Figure 2 and Figure 3 Several Venturi nozzles 2 on the same side of the fabric are arranged in multiple columns along the left-right direction, and each column is staggered from the other in the front-back direction, so that the air outlet area of ​​all Venturi nozzles 2 on the same side covers the entire width of the fabric.

[0054] To allow hot air to penetrate the fabric and quickly remove moisture, this invention features the following structure: (See attached diagram) Figure 3 The Venturi nozzles 2 located on the upper side of the fabric and the Venturi nozzles 2 located on the lower side of the fabric are staggered to avoid the upper and lower sides of the fabric being blown and dried at the same location at the same time, which would cause the upper and lower airflows to cancel each other out and prevent the moisture from leaving the fabric quickly.

[0055] Although the invention employs structures such as a wind deflector 33, an electric regulating valve 31, and a humidity sensor 35, increasing the manufacturing cost of the dryer, it can achieve precise and uniform drying of fabrics with different moisture contents by monitoring local humidity in real time and adaptively adjusting airflow, nozzle position, and airflow direction. This design significantly improves heat exchange efficiency, avoids over-drying and under-drying, and ensures drying quality and consistency while reducing energy consumption. The energy-saving benefits and product quality improvement during long-term operation can quickly balance the initial investment, demonstrating high comprehensive practical value and economic efficiency.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dryer, comprising a drying chamber, wherein a plurality of Venturi nozzles are vertically and slidably connected to the drying chamber and arranged in a matrix on the upper and lower sides of a fabric, characterized in that, The Venturi nozzle uses an adjustable mechanism to blow hot air onto the fabric at a suitable volume, position, and direction. The regulating mechanism includes an electrically adjustable valve connected to the Venturi nozzle and connected to the air supply device. The Venturi nozzle is equipped with a drive assembly. A wind deflector is slidably connected to the outside of the Venturi nozzle. The wind deflector divides the drying chamber into multiple independent and short drying modules. Several grid plates are rotatably arranged at equal intervals on the lower side of the wind deflector. A humidity sensor is fixedly installed inside the wind deflector. During drying, the humidity sensor monitors and feeds back the hot air humidity data to the host computer in real time, so that the host computer controls the Venturi nozzle to move up and down through the drive component, and controls the electric regulating valve to adjust the air volume of the Venturi nozzle. At the same time, the Venturi nozzle drives the grid plate to rotate and adjust the air outlet direction through the set linkage component. By independently adjusting the position, air volume, and air direction of the nozzles in each drying module, targeted and uniform drying operations can be carried out on areas of the fabric with different moisture contents.

2. The dryer according to claim 1, characterized in that, The windshield consists of a vertical section on the left and an inclined section on the right. When the fabric moves, it first passes through the humidity sensor in the inclined section of the windshield, and then through the Venturi nozzle in the vertical section of the windshield.

3. A dryer according to claim 2, characterized in that, The air inlet of the electric regulating valve is connected to the air supply device through an air inlet hose, and the end of the inclined section of the wind deflector away from the fabric is connected to the dehumidification device and the air supply device through an exhaust hose, thereby forming an energy-saving circulating heat delivery circuit.

4. A dryer according to claim 1, characterized in that, The drive assembly includes a bracket plate fixedly mounted on a venturi nozzle, and a hydraulic cylinder is fixedly mounted on the bracket plate. The telescopic section of the hydraulic cylinder is fixedly connected to the drying chamber.

5. A dryer according to claim 1, characterized in that, The linkage assembly includes a linkage frame fixedly installed on the venturi nozzle, a connecting plate hinged to the front side of the linkage frame, and a swing plate fixedly installed on the front side of a grille on the same windshield, the swing plate being hinged to the connecting plate.

6. A dryer according to claim 1, characterized in that, A synchronization plate is fixedly installed at the rear end of the grid plate. The synchronization plates on the same windshield are arranged in parallel to each other, and the ends of the synchronization plates on the same windshield are hinged together with a linkage plate.

7. A dryer according to claim 1, characterized in that, The tilt angle of the grille on the same windshield gradually increases from left to right, and the tilted grille guides the hot air to the right.

8. A dryer according to claim 1, characterized in that, Several wind deflectors located on one side of the fabric and arranged in a matrix are connected to a common plate frame that can slide up and down along the drying box. A hydraulic cylinder with a telescopic section fixedly connected to the drying box is fixedly installed on the plate frame.

9. A dryer according to claim 1, characterized in that, Several Venturi nozzles on the same side of the fabric are arranged in multiple columns along the left-right direction, and each column is staggered from each other in the front-back direction, so that the air outlet area of ​​all Venturi nozzles on the same side covers the entire width of the fabric.

10. A dryer according to claim 1, characterized in that, The Venturi nozzles located on the upper side of the fabric and the Venturi nozzles located on the lower side of the fabric are arranged in a staggered manner to prevent the upper and lower sides of the fabric at the same location from being dried at the same time.

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