A transfer conveyor system for pickling or alkaline cleaning processes

Abstract

The application discloses a transfer conveying system for pickling or causticizing process, and relates to the technical field of conveying equipment. The system comprises a conveying channel connecting two spaces, wherein a conveying track with a chain module is arranged in the channel, a driving part of the chain module directly contacts a workpiece frame, and a traditional conveying trolley is replaced, thereby simplifying hoisting operation; the chain modules on two sides are synchronously driven by a driving assembly, and a supporting panel is matched to reduce chain deformation and prolong service life. The top of the channel is open and is divided into a storage opening and a processing opening by a fixing plate, and each is provided with a door plate which can be independently opened and closed; a gas blocking assembly is arranged, directional airflow is formed when the door plate moves through an air cavity in the door plate and a suction or air blowing module, and diffusion of corrosive gas is blocked. The system improves operation efficiency, enhances safety and durability, and meets the requirements of pickling or causticizing process.

Description

Technical Field

[0001] This invention relates to the field of conveying equipment technology, and in particular to a transfer conveying system for acid washing or alkali washing processes. Background Technology

[0002] Pickling or alkaline washing is an indispensable surface treatment process in the production and processing of metal materials. By placing the metal to be processed in an acid or alkali solution bath, it can effectively remove oxide scale, rust, and oil stains from the material surface, ensuring the quality of subsequent processing. However, during this process, the acid or alkali solution in the bath will inevitably volatilize and produce highly corrosive gases. If these gases come into contact with the skin or respiratory tract of operators, they will seriously damage their health and corrode the factory equipment.

[0003] To mitigate the aforementioned hazards, existing factories generally install pickling or alkaline washing tanks in independent, enclosed rooms equipped with active exhaust systems. These systems continuously extract volatile gases from the plant, reducing direct contact with personnel. However, before entering the enclosed room for processing, metal materials require pre-processing such as sorting and stacking in a material area. Therefore, a transfer and conveying system is needed between the material area and the enclosed room to ensure efficient material transfer and process continuity. Existing transfer and conveying systems mainly consist of a conveyor channel connecting the enclosed room and the material area, along with a conveyor track within the channel. The metal materials to be processed are hoisted onto workpiece racks, placed onto the conveyor track, and then transported through the conveyor channel into the enclosed room, completing the material transfer. However, existing conveyor tracks typically use rail-mounted trolleys as carriers. During operation, operators usually need to manipulate a gantry crane to accurately place the workpiece racks onto the trolley. This requires precise control of the gantry crane, making operation cumbersome and inefficient. Summary of the Invention

[0004] The main objective of this invention is to provide a transfer and conveying system for pickling or alkaline washing processes, which solves the problems of cumbersome workpiece rack placement and low efficiency in existing systems, while effectively blocking the diffusion of corrosive gases, thus achieving more convenient, efficient and safe material transfer and conveying.

[0005] To achieve the above objectives, this invention proposes a transfer and conveying system for pickling or alkaline washing processes, comprising a conveying channel connecting two spaces, an opening at the top of the conveying channel, and several sets of conveying tracks within the conveying channel. Each conveying track includes a support frame mounted on the inner wall of the conveying channel, and chain modules arranged along the length of the conveying channel on the support frame. Each chain module has a drive unit that contacts an external workpiece rack, and the drive unit protrudes from the top surface of the support frame. The system also includes a drive assembly for synchronously moving the several sets of chain modules.

[0006] A fixed plate, a first door panel, and a second door panel are provided at the opening above the conveying channel. The fixed plate is located at the junction of the two spaces, dividing the opening of the conveying channel into a storage port and a processing port. The first door panel is slidably disposed above the storage port, and the second door panel is slidably disposed above the processing port. The first door panel and the second door panel are used to seal the storage port and the processing port, respectively. The system also includes an operating component connected to the control module and driving the first door panel and the second door panel to slide, as well as a second position sensor module that senses the positions of the first door panel and the second door panel. The second position sensor module is connected to the operating component and is used to control the opening or closing of the first door panel or the second door panel individually.

[0007] It also includes a gas blocking component installed in the conveying channel, which is used to block highly corrosive gases that enter the conveying channel from the processing port and diffuse toward the storage port.

[0008] The gas blocking assembly includes air chambers disposed within the first and second door panels and air vents disposed below the first and second door panels, with the air vents facing the processing port. The first door panel is connected to an air suction module, and the second door panel is connected to an air blowing module. Both the air suction module and the air blowing module are connected to a second position sensor module via a control module. The air suction module is used to extract air from the conveying channel when the first door panel moves, and the air blowing module is used to blow air into the conveying channel when the second door panel moves.

[0009] In one possible implementation, the chain module includes a plurality of sprockets rotatably mounted on a support frame and a chain drivingly connecting the plurality of sprockets, the drive assembly being connected to the sprockets.

[0010] In one possible implementation, the cross-section of the support frame is U-shaped with a horizontally oriented opening. An installation groove is formed inside the support frame, and the chain module is disposed within the installation groove. A support panel is also disposed within the installation groove along the direction of chain movement. The chain moves around the support panel, and the drive unit is a chain located above the support panel. The top surface of the support panel contacts the bottom of the drive unit to provide support for the drive unit.

[0011] In one possible implementation, the chain is composed of several links connected together. Each link includes a pair of chain plates and a connecting shaft connecting the pair of chain plates. A pin is rotatably connected to the connecting shaft, and the pin abuts against and slides against the top surface of the support panel.

[0012] In one possible implementation, two chain modules are provided, respectively located on both sides of the conveying channel. The drive assembly includes a drive shaft connecting the sprocket of one of the chain modules and a transmission shaft connecting the two chain modules. The drive shaft is connected to a reducer, and the reducer is connected to a drive motor connected to the control module. The assembly also includes a first position sensor module located on the inner wall of the conveying channel. The position sensor module is connected to the control module and is used to detect the position of the workpiece holder and control the operation of the drive motor through the control module.

[0013] In one possible implementation, an equipment box is provided below the fixed plate, and the operating component includes a pair of screws rotatably mounted on the equipment box. The pair of screws are threadedly connected to the first door panel and the second door panel, respectively, and each pair of screws is connected to a control motor.

[0014] In one possible implementation, the suction module includes a suction pump disposed within a fixed plate and an air outlet box disposed above the fixed plate. The air outlet box is provided with an air outlet facing the space corresponding to the processing port. The inlet of the suction pump is connected to the air chamber of the first door panel, and its outlet is connected to the air outlet box.

[0015] The blowing module includes a blowing pump mounted on a fixed plate and an air inlet box mounted above the fixed plate. The air inlet box has an air inlet facing the space corresponding to the storage port. The inlet of the blowing pump is connected to the air inlet box, and its outlet is connected to the air chamber of the second door panel.

[0016] In summary, the beneficial effects of this application are as follows:

[0017] The transfer and conveying system provided by this invention for pickling or alkaline washing processes, by setting a conveying track with chain modules in the conveying channel, and using the drive part of the chain module protruding from the top surface of the support frame to directly contact the external workpiece frame, replaces the traditional track-type conveying trolley. This eliminates the need for operators to precisely control the gantry frame to accurately place the workpiece frame on the conveying trolley when hoisting the workpiece frame. They only need to roughly place the workpiece frame on the drive part of the conveying track, which greatly simplifies the operation process and effectively improves the operation efficiency.

[0018] Meanwhile, the support panel supports the drive unit located above, which can share the pressure of the workpiece frame on the chain, reduce the stress deformation of the chain, and extend the service life of the chain module. The chain is composed of several links, and the sleeve connected to the connecting shaft of the link rotatably abuts and slides against the top surface of the support panel, which further reduces the frictional resistance when the chain moves, ensures the smoothness of the chain operation, and improves the conveying efficiency.

[0019] Furthermore, the opening above the conveying channel is divided into a storage port and a processing port by a fixed plate. Each port is equipped with a first and second door panel that can be slidably opened or closed independently. These door panels, along with the operating components, enable automatic control, effectively sealing the opening before and after material conveying and reducing the diffusion of corrosive gases. Simultaneously, a gas blocking component, through the air chambers and vents within the first and second door panels, draws air using a suction module and blows air using a blowing module as the door panels move, creating a directional airflow. This effectively prevents corrosive gases entering the conveying channel from the processing port from diffusing to the storage port, reducing damage to personnel and equipment in the material handling area and improving the safety of the operating environment. The suction and blowing modules guide the airflow directionally through an air outlet and an air inlet box, respectively, and are linked to the movement of the door panels, ensuring effective control of gas diffusion even when the door panels are open. The overall structure is compact, with all components working collaboratively. This design significantly enhances the system's safety and durability while improving conveying efficiency and ease of operation, making it more suitable for the actual production needs of acid or alkali washing processes. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a diagram of the internal structure of the conveying channel of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the conveying track of the present invention;

[0024] Figure 4 for Figure 3 Enlarged view at point A;

[0025] Figure 5 This is a schematic diagram of the structure of the first door panel and the second door panel of the present invention;

[0026] Figure 6 This is an exploded view of the first and second door panels of the present invention;

[0027] Figure 7 This is a partial cross-sectional view of the first and second door panels of the present invention;

[0028] Figure 8 for Figure 6 Enlarged view at point B.

[0029] Explanation of icon numbers:

[0030] 0. Ground; 1. Conveying channel; 2. Conveying track; 20. Chain module; 201. Sprocket; 202. Chain; 203. Chain link; 204. Chain plate; 205. Connecting shaft; 206. Pin; 21. Drive unit; 22. Support frame; 221. Mounting slot; 23. Drive assembly; 230. Drive shaft; 231. Transmission shaft; 232. Drive motor; 233. Reducer; 234. First position sensor module; 24. Support 1. Panel; 2. Control module; 3. Fixing plate; 4. Material storage port; 5. Processing port; 6. Second position sensor module; 7. Running component; 80. Screw; 81. Control motor; 9. Equipment box; 10. Gas blocking component; 101. Air chamber; 102. Air outlet; 103. Suction pump; 104. Air outlet box; 105. Blowing pump; 106. Air inlet box; 11. Rail; 12. Roller; 13. First door panel; 14. Second door panel.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] Example 1

[0034] like Figure 1-4 As shown, the present invention proposes a transfer and conveying system for pickling or alkaline washing processes. The system is based on a conveying channel 1 located on the ground 0. The channel connects two spaces: a material area and a closed processing room. The two spaces are a storage area and a processing area, respectively. A wall is set between the processing area and the storage area to separate the two areas. The conveying channel 1 connects the two areas by opening a deep trench on the ground 0.

[0035] like Figure 1-2 As shown, an opening is provided above the conveying channel 1 for hoisting the workpiece rack. The workpiece rack is existing technology, and metal materials can be transported using a crane on a gantry crane. Figure 2 As shown, conveying rails 2 are installed on the inner walls of both sides of the conveying channel 1. The support frame 22 of the rail is fixed to the inner wall of the conveying channel 1, and a chain module 20 is installed on it along the length of the channel. Figure 3-4 As shown, the drive unit 21 of the chain module 20 protrudes from the top surface of the support frame 22 to contact the external workpiece frame, and is equipped with a drive assembly 23 to realize the synchronous movement of multiple chain modules 20.

[0036] like Figure 4 As shown, the chain module 20 includes several sprockets 201 rotatably mounted on the support frame 22 and chains 202 driving the sprockets 201. The drive assembly 23 is connected to one of the sprockets 201 to transmit power. The support frame 22 has a U-shaped cross-section with a transverse opening and an internal mounting groove 221. The chain module 20 is placed in the groove, which also has a support panel 24 along the direction of chain 202 movement. The support panel 24 is a long strip extending along the length of the conveying channel 1 and is fixed to the support frame 22 by bolts. The chain 202 moves around the support panel 24. The chain 202 located above the support panel 24 serves as the drive part 21 that drives the workpiece frame. At the same time, the top surface of the support panel 24 contacts the bottom of the drive part 21, providing support for the drive part 21. This structure can effectively distribute the pressure of the workpiece frame on the chain 202, reduce the deformation of the chain 202 under stress, and extend its service life.

[0037] Meanwhile, the chain 202 is composed of several chain links 203 connected together. Each chain link 203 includes a pair of chain plates 204 and a connecting shaft 205 connecting the chain plates 204. The connecting shaft 205 is externally connected to a pin 206. The pin 206 abuts against and slides with the top surface of the support panel 24, which can reduce the frictional resistance when the chain 202 moves, ensure smooth operation, and improve conveying efficiency.

[0038] A set of chain modules 20 is provided on each side of the conveying channel 1. The drive shaft 230 of the drive assembly 23 is connected to the sprocket 201 of one of the chain modules 20. The transmission shaft 231 connects the two sets of chain modules 20 to achieve synchronous movement. The drive shaft 230 is connected in sequence to the reducer 233 and the drive motor 232 connected to the control module 3. The first position sensor module 234 on the inner wall of the channel is connected to the control module 3. It can detect the position of the workpiece holder and regulate the operation of the drive motor 232 through the control module 3 to achieve automated conveying, reduce manual intervention, and further improve efficiency. The control module 3 includes a control console and an electrical control box that drives the PLC control module 3. The first position sensor module 234 includes two sensor units set at both ends of the conveying channel 1 and corresponding to the conveying track 2. When the workpiece holder is located at both ends of the conveying track 2, it is triggered to make the drive motor 232 work.

[0039] The fixed plate 4 at the opening above the conveying channel 1 is located at the junction of two spaces, dividing the opening into a storage port 5 and a processing port 6. The storage port 5 corresponds to the storage area outside, and a first door plate 13 is slidably installed above it. The processing port 6 corresponds to the closed processing area, and a second door plate 14 is slidably installed above it. Between the storage port 5 and the processing port 6, the opening is sealed by the wall and the fixed plate 4. A pair of screws 80 are rotatably installed on the equipment box 9 below the fixed plate 4. The screws 80 are threadedly connected to the first door plate 13 and the second door plate 14 respectively, and each is connected to a control motor 81, forming a running component 8 that drives the door plates to slide. At the same time, a second position sensor module 7 is equipped to sense the position of the door plates. This module is connected to the running component 8 to control the opening or closing of the door plates individually. This partitioned sealing design can effectively seal the opening before and after material conveying, reducing the diffusion of corrosive gases.

[0040] Specifically, a steel rail 11 is provided above the conveying channel 1, and the fixing plate 4 and the two door panels are all set on the steel rail 11. At the same time, a guide rail is provided on the inner wall of the steel rail 11, and the first door panel 13 and the second door panel 14 are provided on both sides with sliding grooves that slide with the guide rails. The guide rails and sliding grooves can ensure the stable sliding of the first door panel 13 and the second door panel 14, and at the same time, they can support the two door panels.

[0041] Specifically, the working process begins with the placement of the workpiece rack. The operator does not need to precisely control the gantry to align the workpiece rack with the traditional conveyor trolley. The workpiece rack is simply placed roughly on the drive unit 21 of the conveyor track 2. At this time, the chain module 20 operates under the drive component 23. The chains 202 on both sides move synchronously through the transmission shaft 231. The drive unit 21 contacts the workpiece rack and drives it to move along the conveyor channel 1. The support panel 24 continuously provides support for the drive unit 21 during this process to prevent the chain 202 from deforming due to excessive load. The sleeve of the chain link 203 slides with the panel to reduce the movement resistance and ensure smooth conveying.

[0042] When the first position sensor module 234 detects that the workpiece rack has reached the designated position, it transmits a signal to the control module 3. The control module 3 then controls the drive motor 232 to stop operating, completing the precise conveying of the workpiece rack. If the workpiece rack needs to be sent back from the processing room to the material area, the drive motor 232 can be reversed to achieve reverse conveying. Before and after conveying, the second position sensor module 7 senses the position of the door panel and drives the control motor 81 of the running component 8 through the control module 3. The motor drives the screw 80 to rotate, causing the first door panel 13 or the second door panel 14 to slide along the opening, realizing the individual opening or closing of the storage port 5 and the processing port 6. The opening and closing states of the first door panel 13 and the second door panel 14 are opposite. When the first door panel 13 is in the closed state, the second door panel 14 is in the process of opening or closing; when the second door panel 14 is in the closed state, the first door panel 13 is in the process of opening or closing.

[0043] The partitioned design of the first door panel 13 and the second door panel 14 reduces the diffusion range of corrosive gases through the opening, and forms an effective seal when closed. Combined with the efficient conveying of the chain module 20, the overall operation is improved in terms of convenience and safety, making it more suitable for the actual production needs of pickling or alkaline washing processes.

[0044] Example 2

[0045] Because a small amount of corrosive gas can still enter the conveying channel 1 during the opening and closing of the second door panel 14, when the first door panel 13 is opened, the gas in the conveying channel 1 will escape to the outside area. This results in a small amount of corrosive gas still entering the outside, and the air in the storage area will still be polluted during repeated operations, affecting the health of the operators. Therefore, based on Embodiment 1, this embodiment adds a gas blocking component 10 to the conveying channel 1 to further reduce the entry of corrosive gas into the storage area.

[0046] like Figure 5-7 As shown, the structure is tightly integrated with the sealing components and control module 3 of the conveying channel 1. Both the first door panel 13 and the second door panel 14 are provided with air chambers 101, and air ports 102 are opened at the bottom of the door panels, facing the processing port 6 to ensure that the airflow acts directionally inside the channel.

[0047] The first door panel 13 is connected to the suction module, and the second door panel 14 is connected to the blowing module. Both are connected to the second position sensor module 7 via the control module 3 to achieve linkage control with the door panel movement state. The second position sensor module 7 includes position sensor units located at both ends of the rail 11 and corresponding to the positions of the two door panels. These units are used to detect whether the door panel is in an open or closed state, thereby controlling the operation of the control motor 81.

[0048] The suction module includes a suction pump 103 installed in the fixed plate 4 and an air outlet box 104 located above the fixed plate 4. The air outlet of the air outlet box 104 faces the enclosed processing room corresponding to the processing port 6. The inlet of the suction pump 103 is connected to the air chamber 101 of the first door panel 13, and the outlet is connected to the air outlet box 104. The blowing module includes a blowing pump 105 installed on the fixed plate 4 and an air inlet box 106 above the fixed plate 4. The air inlet of the air inlet box 106 faces the material area corresponding to the storage port 5. The inlet of the blowing pump 105 is connected to the air inlet box 106, and the outlet is connected to the air chamber 101 of the second door panel 14. This layout not only utilizes the space of the fixed plate 4 to achieve equipment integration, but also enhances the directional guidance effect of airflow through the orientation of the air outlet.

[0049] The suction pump 103 and the first door panel 13, the blower pump 105 and the second door panel 14 are all connected by flexible hoses, so as to ensure that the two door panels can still be stably connected to their corresponding air pumps during the movement, thus ensuring stable operation.

[0050] Its operation is synchronized with the opening and closing of the door panel. When the second position sensor 7 detects that the first door panel 13 begins to slide, the control module 3 triggers the operation of the suction module. The suction pump 103 extracts the gas in the conveying channel 1 through the air chamber 101 and air outlet 102 of the first door panel 13. The gas is transported to the air outlet box 104 by the suction pump 103 and discharged from the air outlet to the closed room on the processing port 6 side. With the help of the negative pressure formed by the suction, the diffusion of corrosive gas in the channel towards the storage port 5 is reduced. During the sliding of the first door panel 13, since the second door panel 14 is in the closed state, the gas in the closed space will not enter the conveying channel 1. Furthermore, with the movement of the first door panel 13, the gas in the conveying channel 1 can be fully extracted, thereby preventing the residual gas in the conveying channel 1 from escaping to the storage area.

[0051] Meanwhile, as the air in the conveying channel 1 decreases, clean air in the storage area will enter the conveying channel 1 through the storage port 5, thus replenishing the air in the conveying channel 1. As the air in the storage area is conveyed into the conveying channel 1, the outside air will suppress the gas in the conveying channel 1, thereby further reducing the escape of gas in the conveying channel 1 into the storage area through the storage port 5.

[0052] When the second door panel 14 moves, the control module 3 drives the air blowing module to work. The air blowing pump 105 draws in clean air from the storage port 5 side through the air inlet box 106. After being pressurized, the air is blown towards the processing port 6 through the air chamber 101 and air outlet 102 of the second door panel 14, forming an air curtain barrier to prevent corrosive gases from the processing port 6 side from flowing back into the depth of the channel. At this time, since the first door panel 13 is in the closed state, as outside air is blown into the conveying channel 1, the conveying channel 1 will be in a positive pressure state, thereby inhibiting the gas in the processing area from entering the conveying channel 1 along the processing port 6.

[0053] In summary, the suction and blowing actions, coordinated with the door panel's movement rhythm, create dynamic protection the instant the door panel opens, compensating for the shortcomings of simple physical sealing. Even during the brief period of material passage, directional airflow can still control the gas diffusion path. The core principle of this design is to construct a protective barrier using pressure difference and airflow direction. The suction module reduces the air pressure in the channel on the side of the storage port 5 by drawing air, allowing clean external air to naturally replenish the channel and reducing the penetration of corrosive gases. The blowing module actively pushes airflow to form an air curtain, using airflow volume to block the diffusion of corrosive gases. The two work together to form a directional airflow field from the storage port 5 to the processing port 6. At the same time, the design of the air inlet 102 facing the processing port 6 ensures that the airflow directly acts on the critical path of gas diffusion. The positional layout of the air outlet box 104 and the air inlet box 106 coordinates the airflow circulation with the exhaust system of the enclosed room, further improving gas control efficiency, effectively protecting the operating environment of the material area, and reducing the damage of corrosive gases to operators and equipment.

[0054] Example 3

[0055] like Figure 8 As shown, in order to ensure the smooth movement of the two door panels and to prevent the screw 80 from bending and deforming during long-term movement, based on embodiment 1, this embodiment provides a roller 12 that rolls with the rail 11 at the end of the door panel away from the fixed plate 4. The roller 12 is rotatably positioned under the door panel and can support the end of the door panel away from the fixed plate 4, thereby preventing the screw 80 from deforming and being damaged under the action of the door panel.

[0056] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A transfer conveying system for pickling or alkali washing processes, comprising a conveying channel (1) connecting two spaces, wherein an opening is provided above the conveying channel (1), characterized in that, The conveying channel (1) is provided with several sets of conveying tracks (2). The conveying track (2) includes a support frame (22) provided on the inner wall of the conveying channel (1). The support frame (22) is provided with a chain module (20) arranged along the length direction of the conveying channel (1). The chain module (20) is provided with a drive part (21) that contacts the external workpiece frame. The drive part (21) protrudes from the top surface of the support frame (22). It also includes a drive assembly (23) that drives the several sets of chain modules (20) to move synchronously. A fixing plate (4) and a first door plate (13) and a second door plate (14) are provided at the opening above the conveying channel (1). The fixing plate (4) is located at the junction of the two spaces, dividing the opening of the conveying channel (1) into a storage port (5) and a processing port (6). The first door plate (13) is slidably disposed above the storage port (5), and the second door plate (14) is slidably disposed above the processing port (6). The first door plate (13) and the second door plate (14) are used to seal the storage port (5) and the processing port (6) respectively. The conveying channel (1) also includes a running component (8) connected to the control module (3) and driving the first door plate (13) and the second door plate (14) to slide, and a second position sensor module (7) that senses the position of the first door plate (13) and the second door plate (14) respectively. The second position sensor module (7) is connected to the running component (8) and is used to control the opening or closing of the first door plate (13) or the second door plate (14) separately. It also includes a gas blocking assembly (10) disposed in the conveying channel (1), the gas blocking assembly (10) being used to block the highly corrosive gas that enters the conveying channel (1) from the processing port (6) and diffuses toward the storage port (5); The gas blocking assembly (10) includes an air chamber (101) disposed in the first door panel (13) and the second door panel (14) and an air port (102) disposed below the first door panel (13) and the second door panel (14), the air port (102) facing the processing port (6); the first door panel (13) is connected to an air suction module, and the second door panel (14) is connected to an air blowing module. Both the air suction module and the air blowing module are connected to a second position sensor module (7) through a control module (3). The air suction module is used to extract air from the conveying channel (1) when the first door panel (13) moves; the air blowing module is used to blow air into the conveying channel (1) when the second door panel (14) moves.

2. The transfer and conveying system for acid washing or alkaline washing processes according to claim 1, characterized in that, The chain module (20) includes a plurality of sprockets (201) rotatably mounted on a support frame (22) and a chain (202) that drives the plurality of sprockets (201). The drive assembly (23) is connected to the sprockets (201).

3. A transfer and conveying system for acid washing or alkaline washing processes according to claim 2, characterized in that, The cross-section of the support frame (22) is U-shaped, and its opening is arranged horizontally. An installation groove (221) is formed inside the support frame (22), and the chain module (20) is arranged in the installation groove (221). A support panel (24) is also arranged in the installation groove (221) along the movement direction of the chain (202). The chain (202) moves around the support panel (24). The drive unit (21) is the chain (202) located above the support panel (24). The top surface of the support panel (24) contacts the bottom of the drive unit (21) and is used to support the drive unit (21).

4. A transfer and conveying system for acid washing or alkali washing processes according to claim 3, characterized in that, The chain (202) is composed of several chain links (203) connected together. Each chain link (203) includes a pair of chain plates (204) and a connecting shaft (205) connecting the pair of chain plates (204). The connecting shaft (205) is externally rotatably connected to a pin (206). The pin (206) abuts against and slides against the top surface of the support panel (24).

5. A transfer and conveying system for pickling or alkaline washing processes according to any one of claims 1-4, characterized in that, Two chain modules (20) are provided, respectively located on both sides of the conveying channel (1). The drive assembly (23) includes a drive shaft (230) connecting the sprocket (201) of one of the chain modules (20) and a transmission shaft (231) connecting the two chain modules (20). The drive shaft (230) is connected to a reducer (233), and the reducer (233) is connected to a drive motor (232) connected to the control module (3). It also includes a first position sensor module (234) located on the inner wall of the conveying channel (1). The first position sensor module (234) is connected to the control module (3) and is used to detect the position of the workpiece holder and control the drive motor (232) to operate through the control module (3).

6. A transfer and conveying system for pickling or alkaline washing processes according to claim 1, characterized in that, The equipment box (9) is provided below the fixed plate (4). The running component (8) includes a pair of screws (80) rotatably mounted on the equipment box (9). The pair of screws (80) are threadedly connected to the first door plate (13) and the second door plate (14) respectively, and each pair of screws (80) is connected to a control motor (81).

7. A transfer and conveying system for acid washing or alkali washing processes according to claim 1, characterized in that, The suction module includes a suction pump (103) disposed in the fixed plate (4) and an air outlet box (104) disposed above the fixed plate (4). The air outlet box (104) is provided with an air outlet facing the space corresponding to the processing port (6). The inlet of the suction pump (103) is connected to the air chamber (101) of the first door panel (13), and its outlet is connected to the air outlet box (104). The blowing module includes a blowing pump (105) disposed on the fixed plate (4) and an air inlet box (106) disposed above the fixed plate (4). The air inlet box (106) is provided with an air inlet facing the space corresponding to the storage port (5). The inlet of the blowing pump (105) is connected to the air inlet box (106), and its outlet is connected to the air chamber (101) of the second door panel (14).

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