PLC (Programmable Logic Controller) controlled bean soaking and feeding device

By designing a PLC-controlled bean-soaking feeding device, the coordination of the main component and the control component can achieve accurate control of bean-soaking feeding, solving the problem that existing devices cannot accurately control the number of loading times and improving the quality of soy products and taste stability.

CN222491036UActive Publication Date: 2025-02-18NINGBO XINYUN AUTOMATION EQUIP CO LTD
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Patent Information

Application Number
CN202421133387.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-23
Publication Date
2025-02-18
Estimated Expiration
2034-05-23

AI Technical Summary

Technical Problem

The existing bean soaking feeding device cannot accurately control the number of times the beans is loaded, resulting in unstable bean quantity and quality, affecting the consistency of the quality and taste of soy products.

Method used

A PLC-controlled bean-piping device is designed, including a main component and a control component. The main assembly includes a support seat, a controller, a protective shell, a transportation pipeline and a feeding port. The control assembly is arranged in the transportation pipeline, including screening parts, blocking parts and cleaning parts. Through the cooperation of these components, the accuracy of the beans can be achieved. Screen and orderly load.

Benefits of technology

By accurately controlling the number of times of soaking beans, we can ensure the consistency of the quantity and quality of beans, improve the quality and taste stability of soy products, and avoid the reduction of the quality of soy products in subsequent processing steps.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of bean soaking control, and discloses a PLC controlled bean soaking feeding device which comprises a main body assembly, a supporting seat, a controller, a protective shell, a conveying pipeline and a feeding port, the controller is fixed to one side of the supporting seat, the protective shell is fixed to one side of the supporting seat, the conveying pipeline is fixed in the protective shell, and the feeding port is fixed to the supporting seat. The feeding opening is fixed to one side of the conveying pipeline. And the control assembly is arranged in the conveying pipeline and comprises a screening piece, a blocking piece and a cleaning piece, the screening piece is arranged in the conveying pipeline, the blocking piece is located on one side of the blocking piece, and the cleaning piece is arranged below the protective shell.
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Description

Technical Field

[0001] The utility model relates to the technical field of controlling bean soaking, in particular to a PLC-controlled bean soaking feeding device. Background Art

[0002] In the process of soy product processing, the supply of soaked beans as raw materials is one of the key links in the production line. The traditional method of soaking beans and feeding often relies on manual operation. This method is not only inefficient, but also easily affected by human factors, resulting in unstable supply of soaked beans, which in turn affects the quality and efficiency of subsequent production processes. With the continuous development of automation technology, more and more companies are beginning to seek to improve the efficiency and accuracy of soaking beans and feeding through automated equipment. At present, most of the soaking bean feeding devices on the market cannot accurately control the number of times the soaked beans are fed. If the number of times cannot be accurately controlled, the quantity and quality of the soaked beans will be unstable, thereby failing to ensure the consistency of the quality and taste of the soy products in the subsequent processing steps, and failing to ensure the stability of the taste and quality of the soy products in subsequent production steps such as grinding and boiling, thereby reducing the overall product quality. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] In view of the above and / or existing problems in the existing PLC-controlled soaking bean feeding device, the present utility model is proposed.

[0005] Therefore, the problem to be solved by the utility model is that most of the bean soaking and feeding devices on the market are unable to accurately control the number of times the beans are fed. If the number of times the beans are fed cannot be accurately controlled, the quantity and quality of the soaked beans will be unstable, thereby failing to ensure the consistency of the quality and taste of the bean products in the subsequent processing steps. In addition, in the subsequent production steps such as grinding and boiling, the taste and quality of the bean products cannot be ensured to be stable, thereby reducing the quality of the overall product.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a PLC-controlled bean soaking feeding device, which includes a main body component, including a support seat, a controller, a protective shell, a transportation pipeline and a feeding port, wherein the controller is fixed to one side of the support seat, the protective shell is fixed to one side of the support seat, the transportation pipeline is fixed in the protective shell, and the feeding port is fixed to one side of the transportation pipeline; and,

[0007] A control component is arranged in the transport pipeline, and comprises a screening component, a blocking component and a cleaning component. The screening component is arranged in the transport pipeline, the blocking component is located on one side below the protective shell, and the cleaning component is arranged on one side of the blocking component.

[0008] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the screening element includes a rotating motor and an isolation block, the rotating motor is fixed in the transport pipeline, and the isolation block is fixed to one side of the rotating motor.

[0009] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the screening component further includes a screening rod and a fixed plate, the screening rod is fixed to the output end of the rotating motor, and the fixed plate is fixed in the protective shell.

[0010] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the screening component further includes a receiving hopper and a discharging port, the receiving hopper is fixed to the bottom of the protective shell, and the discharging port is fixed to one side of the receiving hopper.

[0011] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the blocking member includes a rotating disk and a movable pipe, the rotating disk is fixed to one end of the screening rod, and the movable pipe is fixed to the bottom of the protective shell.

[0012] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the blocking member further includes a rotating rod and a rotating gear, the rotating rod is rotatably connected to the moving pipe, the rotating gear is fixed to the surface of the rotating rod, and the rotating disk is meshed with the rotating gear.

[0013] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the blocking member further comprises a rotating block and a blocking block, the rotating block is fixed to the surface of the rotating rod, and the blocking block is fixed to one side of the rotating block.

[0014] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the cleaning component includes a soaking tank and a positioning plate, the soaking tank is fixed to the bottom of the moving pipe, and the positioning plate is fixed to the top of the soaking tank.

[0015] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the cleaning part also includes a first bevel gear, a positioning plate, a rotating rod and a second bevel gear, the first bevel gear is fixed to one end of the rotating rod, the positioning plate is fixed to one side of the positioning plate, the rotating rod is rotatably connected to the positioning plate, the second bevel gear is fixed to one end of the rotating rod, and the first bevel gear and the second bevel gear are meshed with each other.

[0016] As a preferred solution of the PLC-controlled soaked bean feeding device of the utility model, the cleaning part also includes a rotating belt, a limit plate, a connecting rod and an evacuation plate, the rotating belt is fixed to the surface of the rotating rod, the limit plate is fixed to one side of the positioning plate, the connecting rod is rotatably connected to the limit plate, and the evacuation plate is fixed to the surface of the connecting rod.

[0017] The beneficial effects of the utility model are as follows: by setting a control component, when the beans need to be soaked, the beans can be screened by the screening piece, and small fragments contained in the beans can be distinguished, and the beans can be soaked in an orderly manner through the cooperation of the blocking piece and the cleaning piece, thereby ensuring the consistency of the quality and taste of the bean products in the subsequent processing steps of the beans. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 This is the structural diagram of the PLC-controlled soaking bean feeding device.

[0020] Figure 2 This is the connection structure diagram of the protective shell and mobile pipeline of the PLC-controlled bean soaking and feeding device.

[0021] Figure 3 This is a cross-sectional structural diagram of the protective shell of the PLC-controlled bean soaking and feeding device.

[0022] Figure 4 This is the connection structure diagram of the soaking tank and positioning plate of the PLC-controlled soaking bean feeding device.

[0023] Figure 5 PLC controls the soaking bean feeding device Figure 4 A in the enlarged structure diagram.

[0024] Figure 6 This is the connection structure diagram of the rotating disk and rotating gear of the PLC-controlled soaking bean feeding device.

[0025] Figure 7 PLC controls the soaking bean feeding device Figure 6 The enlarged structure diagram at B in the figure.

[0026] Figure 8 PLC controls the soaking bean feeding device Figure 6 Enlarged structure diagram at C in the figure. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1

[0031] Reference Figures 1 to 8 , which is the first embodiment of the utility model, and this embodiment provides a PLC-controlled bean soaking and feeding device, which includes a main component 100 and a control component 200. Through the cooperation of the two, when the beans need to be soaked, the beans can be screened by the screening component 201 to distinguish the small fragments contained in the beans, and the beans can be soaked in an orderly manner through the mutual cooperation of the blocking component 202 and the cleaning component 203, so as to ensure the consistency of the quality and taste of the bean products in the subsequent processing steps of the beans.

[0032] Specifically, the main component 100 includes a support base 101, a controller 102, a protective shell 103, a transport pipe 104 and a loading port 105. The controller 102 is fixed to one side of the support base 101, the protective shell 103 is fixed to one side of the support base 101, the transport pipe 104 is fixed in the protective shell 103, and the loading port 105 is fixed to one side of the transport pipe 104.

[0033] The support seat 101 is used to support the protective shell 103 to ensure that the bean soaking feeding device does not shake when in use. The controller 102 is used to control the feeding interval of the bean soaking feeding device to achieve accurate and flexible control of the bean soaking feeding process. The controller 102 is a prior art and will not be described here. The protective shell 103 is used to ensure that the transport pipe 104 does not shake when in use. The transport pipe 104 is used to ensure that the beans do not leave the moving track when the beans are screened. The feeding port 105 is used to facilitate the pouring of the beans into the transport pipe 104, so that the beans can be screened to ensure that no small pieces follow the beans into the next process.

[0034] The control component 200 is arranged in the transport pipe 104, and includes a screening component 201, a blocking component 202 and a cleaning component 203. The screening component 201 is arranged in the transport pipe 104, the blocking component 202 is located on one side below the protective shell 103, and the cleaning component 203 is arranged on one side of the blocking component 202.

[0035] The screening element 201 is used to screen the beans to ensure that no small pieces fall into the water with the beans and are soaked, so as to avoid small pieces from polluting the water and thus reducing the quality of the beans. The blocking element 202 can cooperate with the cleaning element 203 to ensure the consistency of the quality and taste of the bean products in the subsequent processing steps of the beans, and help to maintain the taste and quality of the bean products stable in the subsequent production steps such as grinding and boiling, thereby improving the overall product quality.

[0036] Specifically, the screening element 201 includes a rotating motor 201a and an isolation block 201b. The rotating motor 201a is fixed in the transport pipeline 104, and the isolation block 201b is fixed to one side of the rotating motor 201a.

[0037] The rotating motor 201a is used to drive the bean soaking and feeding device to screen the beans, so as to separate the small pieces from the beans. The isolation block 201b is used to isolate the beans to ensure that the beans will not touch the rotating motor 201a, thereby ensuring that the rotating motor 201a can be used normally.

[0038] Specifically, the screening element 201 further includes a screening rod 201 c and a fixing plate 201 d . The screening rod 201 c is fixed to the output end of the rotating motor 201 a , and the fixing plate 201 d is fixed in the protective shell 103 .

[0039] The screening rod 201c is used to screen the beans and small pieces, and bring the beans to the next process, so that the small pieces fall into the transport pipe 104, thereby ensuring that the small pieces will not move with the beans. The fixed plate 201d is used to fix the position of the screening rod 201c to ensure that the screening rod 201c can drive the beans to move, thereby ensuring that the next process can operate normally.

[0040] Specifically, the screening element 201 further includes a receiving hopper 201e and a discharging port 201f. The receiving hopper 201e is fixed to the bottom of the protective shell 103, and the discharging port 201f is fixed to one side of the receiving hopper 201e.

[0041] The collecting hopper 201e is used to collect small fragments. A drop chute is opened on one side of the transport pipe 104, so that the small fragments can fall into the collecting hopper 201e through the drop chute on one side of the transport pipe 104. The discharge port 201f is used to clean out the small fragments that fall into the collecting hopper 201e, ensuring that the collecting hopper 201e will not be blocked and ensuring that the screening element 201 can be used normally.

[0042] Example 2

[0043] Reference Figure 2 and Figures 4 to 7 , which is the second embodiment of the utility model, and this embodiment is based on the previous embodiment.

[0044] Specifically, the blocking member 202 includes a rotating disk 202 a and a moving pipe 202 b . The rotating disk 202 a is fixed to one end of the screening rod 201 c , and the moving pipe 202 b is fixed to the bottom of the protective shell 103 .

[0045] When the screening rod 201c rotates, the rotating disk 202a can be driven to move as well. The rotating disk 202a is used to drive the blocking member 202 to regularly send the beans to the next process, so as to ensure stable control of the quantity and quality of the beans. The moving pipe 202b is used to ensure that the beans do not contact the outside when they are moving, avoiding contamination of the beans when they are moving, so as to ensure consistent quality and taste of the bean products in the subsequent processing steps.

[0046] Specifically, the blocking member 202 further includes a rotating rod 202c and a rotating gear 202d. The rotating rod 202c is rotatably connected to the moving pipe 202b. The rotating gear 202d is fixed to the surface of the rotating rod 202c. The rotating disk 202a and the rotating gear 202d are meshed with each other.

[0047] The rotating rod 202c is used to support the position of the rotating gear 202d, so as to ensure that the rotating gear 202d can mesh with the rotating disk 202a, and ensure that when the rotating disk 202a rotates, the rotating gear 202d can also be driven to rotate. Because the rotating disk 202a can only mesh with the rotating gear 202d when it rotates a complete circle, the rotating disk 202a can only drive the rotating gear 202d to rotate 90 degrees, so that the rotating gear 202d can only drive the rotating rod 202c to rotate 90 degrees, thereby controlling the blocking member 202 to regularly send the beans to the next process.

[0048] Specifically, the blocking member 202 further includes a rotating block 202e and a blocking block 202f. The rotating block 202e is fixed to the surface of the rotating rod 202c, and the blocking block 202f is fixed to one side of the rotating block 202e.

[0049] When the rotating rod 202c rotates 90 degrees, the rotating rod 202c can drive the rotating block 202e to rotate 90 degrees, so that the blocking block 202f can be driven to rotate through the rotating block 202e, and the same batch of beans can be sent to the next process together through the blocking block 202f. There are 4 blocking blocks 202f, all fixed on one side of the rotating block 202e, which are used to collect the beans sent down by the screening rod 201c so that the beans can be sent to the next process at the same time, thereby ensuring the quality and quantity of the beans, thereby maintaining the taste and quality of the bean products.

[0050] Example 3

[0051] Reference Figure 1 to Figure 4 and Figure 6 to Figure 8 , which is the third embodiment of the utility model, and this embodiment is based on the first two embodiments.

[0052] Specifically, the cleaning member 203 includes a soaking pool 203a and a positioning plate 203b. The soaking pool 203a is fixed to the bottom of the moving pipe 202b, and the positioning plate 203b is fixed to the top of the soaking pool 203a.

[0053] The soaking tank 203a is used to soak the beans sent down by the blocking block 202f, ensuring that the quantity and quality of the beans loaded each time are consistent, which helps to maintain the taste and quality of the soy products in subsequent production steps such as grinding and boiling. There are two positioning plates 203b, both fixed on the top of the soaking tank 203a. The positioning plates 203b are used to fix the position of the cleaning piece 203 to ensure that the cleaning piece 203 does not shake when in use.

[0054] Specifically, the cleaning member 203 also includes a first bevel gear 203c, a positioning plate 203d, a rotating rod 203e and a second bevel gear 203f. The first bevel gear 203c is fixed to one end of the rotating rod 202c, the positioning plate 203d is fixed to one side of the positioning plate 203b, the rotating rod 203e is rotatably connected to the positioning plate 203d, the second bevel gear 203f is fixed to one end of the rotating rod 203e, and the first bevel gear 203c and the second bevel gear 203f are meshed with each other.

[0055] When the rotating rod 202c rotates, the first bevel gear 203c can be driven to rotate at the same time. The positioning plate 203d is used to support the position of the rotating rod 203e, thereby ensuring that the rotating rod 203e can support the position of the second bevel gear 203f, so that the second bevel gear 203f can mesh with the first bevel gear 203c, thereby ensuring that when the first bevel gear 203c rotates, the second bevel gear 203f can be driven to rotate, so that the second bevel gear 203f drives the rotating rod 203e to rotate.

[0056] Specifically, the cleaning part 203 also includes a rotating belt 203g, a limiting plate 203h, a connecting rod 203i and an evacuation plate 203j. The rotating belt 203g is fixed to the surface of the rotating rod 203e, the limiting plate 203h is fixed to one side of the positioning plate 203b, the connecting rod 203i is rotatably connected to the limiting plate 203h, and the evacuation plate 203j is fixed to the surface of the connecting rod 203i.

[0057] When the rotating rod 203e rotates, the rotating belt 203g can be driven to rotate at the same time, so that the rotating rod 203e also rotates and drives the connecting rod 203i to rotate. There are two limit plates 203h, both of which are fixed on one side of the positioning plate 203b. The limit plate 203h is used to support the position of the connecting rod 203i, so that the rotating belt 203g can drive the connecting rod 203i to rotate. When the connecting rod 203i rotates, the evacuation plate 203j can be driven to rotate, so that the beans in the soaking tank 203a can be evacuated through the evacuation plate 203j, so that the beans are not concentrated on one side of the soaking tank 203a, ensuring that the beans can be soaked and then processed later, thereby ensuring the quality of the overall product.

[0058] During use, when the beans need to be soaked and processed in an orderly manner, first, the output end of the rotating motor 201a is driven to rotate the screening rod 201c to screen the beans, so that the small fragments in the beans are separated from the beans by the screening, so as to prevent the small fragments from following the beans into the next process, and the small fragments are discharged into the receiving hopper 201e through the drop chute provided on one side of the transport pipe 104, and after the small fragments are collected, they are discharged from the discharge port 201f, and the small fragments are processed in a centralized manner. When the screening rod 201c rotates, the rotating disk 202a can be driven to rotate, so that the rotating disk 202a drives the rotating gear 202d to rotate, because the rotating disk 202a can only mesh with the rotating gear 202d when it rotates a full circle, so that the rotating gear 202d can only rotate 90 degrees, thereby ensuring that the rotating gear 202d drives the rotating disk 202a to rotate. The movable rod 202c can only rotate 90 degrees, and the rotating block 202e is driven by the rotating rod 202c to rotate 90 degrees, thereby ensuring that the beans can enter the next process in batches in an orderly manner, thereby improving the quality and taste of the bean products in the subsequent processing steps of the beans, so that the beans can be sent to the soaking tank 203a for soaking in an orderly manner through the rotating block 202e. When the rotating rod 202c rotates, the first bevel gear 203c can be driven to rotate at the same time, so that the first bevel gear 203c drives the second bevel gear 203f to rotate, so that the second bevel gear 203f drives the rotating belt 203g to rotate, and the rotating belt 203g drives the evacuation plate 203j to rotate in the soaking tank 203a, so as to avoid the beans from piling up on one side of the soaking tank 203a, resulting in incomplete soaking of the beans and affecting the quality of the overall product.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A PLC controlled soaking bean feeding device, characterized in that: include, A main body component (100) comprises a support base (101), a controller (102), a protective shell (103), a transport pipe (104) and a loading port (105), wherein the controller (102) is fixed to one side of the support base (101), the protective shell (103) is fixed to one side of the support base (101), the transport pipe (104) is fixed inside the protective shell (103), and the loading port (105) is fixed to one side of the transport pipe (104); and, The control component (200) is arranged in the transport pipeline (104), and comprises a screening component (201), a blocking component (202) and a cleaning component (203); the screening component (201) is arranged in the transport pipeline (104), the blocking component (202) is located below the protective shell (103), and the cleaning component (203) is arranged on one side of the blocking component (202).

2. The PLC controlled soaked bean feeding device according to claim 1, characterized in that: The screening element (201) comprises a rotating motor (201a) and an isolation block (201b); the rotating motor (201a) is fixed in the transport pipeline (104); and the isolation block (201b) is fixed to one side of the rotating motor (201a).

3. The PLC controlled soaked bean feeding device according to claim 2, characterized in that: The screening element (201) further comprises a screening rod (201c) and a fixing plate (201d), wherein the screening rod (201c) is fixed to the output end of the rotating motor (201a), and the fixing plate (201d) is fixed in the protective shell (103).

4. The PLC controlled soaked bean feeding device according to claim 3, characterized in that: The screening element (201) further comprises a material receiving hopper (201e) and a material discharging port (201f); the material receiving hopper (201e) is fixed to the bottom of the protective shell (103); and the material discharging port (201f) is fixed to one side of the material receiving hopper (201e).

5. The PLC controlled soaked bean feeding device according to claim 4, characterized in that: The blocking member (202) comprises a rotating disk (202a) and a moving pipe (202b), wherein the rotating disk (202a) is fixed to one end of the screening rod (201c), and the moving pipe (202b) is fixed to the bottom of the protective shell (103).

6. The PLC controlled soaked bean feeding device according to claim 5, characterized in that: The blocking member (202) further comprises a rotating rod (202c) and a rotating gear (202d), wherein the rotating rod (202c) is rotatably connected to the moving pipe (202b), the rotating gear (202d) is fixed to the surface of the rotating rod (202c), and the rotating disk (202a) and the rotating gear (202d) are meshed with each other.

7. The PLC controlled soaked bean feeding device according to claim 6, characterized in that: The blocking member (202) further comprises a rotating block (202e) and a blocking block (202f), wherein the rotating block (202e) is fixed to the surface of the rotating rod (202c), and the blocking block (202f) is fixed to one side of the rotating block (202e).

8. The PLC controlled soaked bean feeding device according to claim 6 or 7, characterized in that: The cleaning member (203) comprises a soaking tank (203a) and a positioning plate (203b), wherein the soaking tank (203a) is fixed to the bottom of the moving pipe (202b), and the positioning plate (203b) is fixed to the top of the soaking tank (203a).

9. The PLC controlled soaked bean feeding device according to claim 8, characterized in that: The cleaning member (203) further comprises a first bevel gear (203c), a positioning plate (203d), a rotating rod (203e) and a second bevel gear (203f); the first bevel gear (203c) is fixed to one end of the rotating rod (202c); the positioning plate (203d) is fixed to one side of the positioning plate (203b); the rotating rod (203e) is rotatably connected to the positioning plate (203d); the second bevel gear (203f) is fixed to one end of the rotating rod (203e); and the first bevel gear (203c) and the second bevel gear (203f) are meshed with each other.

10. The PLC controlled soaked bean feeding device according to claim 9, characterized in that: The cleaning member (203) further comprises a rotating belt (203g), a limiting plate (203h), a connecting rod (203i) and an evacuation plate (203j), wherein the rotating belt (203g) is fixed to the surface of the rotating rod (203e), the limiting plate (203h) is fixed to one side of the positioning plate (203b), the connecting rod (203i) is rotatably connected to the limiting plate (203h), and the evacuation plate (203j) is fixed to the surface of the connecting rod (203i).