A compact plasma thawing device

Abstract

The present application belongs to the technical field of plasma product processing equipment, and particularly relates to a compact dry-wet dual-purpose plasma thawing instrument. The compact dry-wet dual-purpose plasma thawing instrument comprises a shell, a thawing assembly and a shaking driving assembly arranged in the shell. The shell comprises a cover at the top and a bottom plate at the bottom. The thawing assembly comprises a water tank, a thawing water tank and a circulating water pump. The water tank is fixed on the bottom plate. A backwater tank is arranged above the front side of the thawing water tank. The shaking driving assembly comprises a mounting plate, a driving motor, an eccentric wheel, a connecting rod, a linear guide rail sliding block pair and a movable support. The present application optimizes the internal structure design of the product, effectively compresses the number of various supporting and fixing structures, effectively utilizes the internal installation space, shortens the length of the internal circulation system pipeline path, improves the system reaction efficiency, has lower production and preparation cost, smaller volume and mass, and smaller installation and use space, and can flexibly meet the needs of small and medium-sized primary medical or production systems.

Description

Technical Field

[0001] This invention belongs to the technical field of plasma product processing equipment, and particularly relates to a compact dry and wet plasma thawing device. Background Technology

[0002] Plasma products are generally stored in a cryogenic frozen state. Before use, they need to be thawed and insulated. This requires the use of various thawing and insulation equipment, including commonly used water bath thawing equipment. Water bath thawing equipment mainly consists of a shaking system, a water bath thawing tank, and a constant temperature water preparation and circulation system. Currently, the plasma thawing equipment on the market has a crude structural design. In addition to the aforementioned basic functional structure, it requires a large amount of additional installation space and structure for support and fixation. This results in water bath thawing equipment being too large and heavy, requiring a large installation and use space, making transportation and maintenance difficult, and inconvenient to use in various basic medical systems or emergency needs. Summary of the Invention

[0003] The purpose of this invention is to provide a compact dry and wet plasma thawing device that has undergone optimized structural layout design, effectively reducing the size and weight of the device, and making it more convenient to use and maintain.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A compact dry and wet plasma thawing device includes a housing 1 and a thawing component 2 and an oscillation drive component 3 disposed inside the housing 1;

[0006] The shell 1 is a rectangular hollow shell, including a top cover 10 and a bottom plate 11. An operation window 10a is provided on one side of the top of the cover 10 and an installation window 10b is cut out on the other side. A flap 10c is installed at the operation window 10a and a panel mounting shell plate 10d is fastened at the installation window 10b.

[0007] The defrosting assembly 2 includes a water tank 20, a defrosting water tank 21, and a circulating water pump 22;

[0008] Water tank 20 is fixed on base plate 11; thawing water tank 21 is fixed on the upper side of water tank 20 with its opening facing the operation window 10a. One side of thawing water tank 21 extends from the upper end face of water tank 20, and the extended part of the bottom of thawing water tank 21, together with the side of water tank 20 and the inner wall of nearby cover 10, forms an installation cavity; circulating water pump 22 is set in the installation cavity and its bottom is connected to base plate 11.

[0009] The water tank 20 is provided with an inlet pipe head 20a and an outlet pipe head 20b on the shell wall on one side of the installation cavity, and a drain pipe head 20c is provided at the bottom of the water tank 20.

[0010] The rear wall of the casing 10 is provided with an inlet pipe 100a connected to the inlet pipe head 20a and an outlet pipe head 20b; a strip-shaped flow guide 23 is provided on the lower rear side of the thawing water tank 21, the strip-shaped flow guide 23 is fastened to the outer wall of the thawing water tank 21, and inlet holes 21a are evenly provided in the corresponding area of ​​the outer wall of the thawing water tank 21. A connecting pipe head 21b is provided on the strip-shaped flow guide 23; the outlet pipe head 20b is connected to the connecting pipe head 21b through the circulating water pump 22.

[0011] A return water tank 24 is provided above the front side of the thawing water tank 21. The rear wall of the return water tank 24 is formed by the front shell wall of the thawing water tank 21, and water outlet holes 21c are evenly arranged on the shell wall of the return water tank 24. A return water pipe 21d connected to the water tank 20 is provided at the bottom of the return water tank 24.

[0012] The oscillation drive assembly 3 includes a mounting plate 30 fixed to the rear side of the defrosting water tank 21, and a drive motor 31, an eccentric wheel 32, a connecting rod 33, a linear guide slider pair 34, and a movable bracket 35 disposed on the mounting plate 30.

[0013] The linear guide slider pair 34 is fixed on the upper side of the mounting plate 30 and extends along the length of the thawing water tank 21. The movable bracket 35 is fixedly connected to the slider. The drive motor 31 is mounted on the mounting plate 30 and close to one end of the guide rail. The main shaft of the eccentric wheel 32 is connected to the motor shaft of the drive motor 31. The two ends of the connecting rod 33 are respectively connected to the eccentric shaft of the eccentric wheel 32 and the movable bracket 35.

[0014] In a further improvement or preferred embodiment of the aforementioned compact dry and wet plasma thawing device, the water tank 20 has a flat drawer-shaped structure, with its upper horizontal large end face forming an installation plane; the thawing water tank 21 is narrower than the width of the installation plane and is installed in the middle of the installation plane so that the front and rear sides of the installation plane are exposed.

[0015] The exposed portion of the mounting plane at the front, together with the cover and the front wall of the thawing water tank 21, forms a return water mounting cavity; the exposed portion of the mounting plane at the rear, together with the cover and the rear wall of the thawing water tank 21, forms a water inlet mounting cavity.

[0016] In a further improvement or preferred embodiment of the aforementioned compact dry and wet plasma thawing device, the return water tank 24 is set in the return water installation cavity, and the return water pipe 21d passes through the bottom of the return water tank 24, goes down through the exposed part on the front side of the installation plane, and returns to the water tank 20; a liquid level switch installation hole is also dug out on the exposed part on the front side of the installation plane, and a liquid level switch 21f is installed in the liquid level switch installation hole; a water tank drain valve 25 controlled by the liquid level switch is provided on the side of the water tank 20.

[0017] In a further improvement or preferred embodiment of the aforementioned compact dry and wet plasma thawing device, the strip-shaped flow guide hood 23 is disposed on the lower side of the water inlet mounting cavity, and the oscillation drive assembly 3 is disposed on the upper side of the water inlet mounting cavity.

[0018] In a further improvement or preferred embodiment of the aforementioned compact dry and wet plasma thawing device, a connecting strip 110 is provided on the inner edge of the base plate 11, and lower connecting holes 111 are evenly provided on the connecting strip 110; the lower end of the cover 10 is open and the edge of the opening is provided with upper connecting holes 100 that cooperate with the lower connecting holes 111.

[0019] In a further improvement or preferred embodiment of the aforementioned compact dry and wet plasma thawing device, the operation window 10a is a horizontally set rectangular window, the size of the operation window 10a matches the size of the thawing water tank 21, the lower edge of the operation window 10a extends downward to form a limiting eave 10e, the limiting eave 10e surrounds a rectangular groove, and the upper side of the thawing water tank 21 is fastened in the rectangular groove.

[0020] In a further improvement or preferred embodiment of the aforementioned compact dry and wet plasma thawing device, the movable support 35 includes a horizontal support plate frame 350, on which a plurality of strip-shaped mounting openings 351 extending in the left and right directions are evenly arranged, and strip-shaped fixing holes 352 are provided on the front and rear sides of the strip-shaped mounting openings 351.

[0021] The oscillation drive assembly 3 also includes isolation kits disposed within each strip-shaped mounting port 351; the isolation kits include water-proof bags 353, fixing rings 354, and positioning strips 355;

[0022] The fixing ring 354 is inserted into the strip mounting port 351, and the front and rear sides of the fixing ring 354 are provided with buckles that can be inserted into the strip fixing hole 352;

[0023] A water-proof bag 353 is placed inside the strip-shaped installation port 351. The upper end of the water-proof bag 353 is open and the edge of the opening is pressed against the horizontal support plate 350 by the fixing ring 354.

[0024] The positioning strip 355 has a U-shaped structure. The top of the two vertical arms of the positioning strip 355 is provided with claw buckles that can be attached to the fixing ring 354. The lower side of the positioning strip 355 extends into the water-proof bag 353.

[0025] Its beneficial effects are as follows:

[0026] To reduce the difficulty of using and maintaining plasma thawing equipment and make it portable and compact, this invention optimizes the internal structural design of the product, effectively reducing the number of various supporting and fixing structures, making efficient use of internal installation space, shortening the length of the internal circulation system pipeline, and improving system reaction efficiency. Compared with similar products, this device has lower manufacturing costs, smaller size and weight, and requires less installation and usage space, which can effectively expand the applicable environment of the thawing device and flexibly meet the needs of small and medium-sized primary healthcare or production systems. Attached Figure Description

[0027] Figure 1 This is a front view of a compact wet and dry plasma thawing device;

[0028] Figure 2 It is the assembly of a compact wet and dry plasma thawing device. Figure 1 ;

[0029] Figure 3 It is the assembly of a compact wet and dry plasma thawing device. Figure 2 ;

[0030] Figure 4 This is a diagram of the defrosting component. Figure 1 ;

[0031] Figure 5 This is a diagram of the defrosting component. Figure 2 ;

[0032] Figure 6 This is a schematic diagram of the isolation kit;

[0033] The reference numerals in the attached figures include:

[0034] Housing 1, Cover 10, Operation window 10a, Installation window 10b, Flip plate 10c, Mounting shell plate 10d, Limiting eaves 10e, Base plate 11, Water inlet pipe 100a, Connecting strip 110, Upper connecting hole 100, Lower connecting hole 111; Defrost assembly 2, Water tank 20, Water inlet pipe head 20a, Water outlet pipe head 20b, Defrost water tank 21, Water inlet hole 21a, Connecting pipe head 21b, Water outlet hole 21c, Return Water pipe 21d, liquid level switch 21f, circulating water pump 22, strip guide hood 23, return water tank 24, water tank drain valve 25; defrosting assembly 3, mounting plate 30, drive motor 31, eccentric wheel 32, connecting rod 33, linear guide rail slider pair 34, movable bracket 35, horizontal support plate frame 350, strip mounting port 351, strip fixing hole 352, water-proof bag 353, fixing ring 354, positioning strip 355. Detailed Implementation

[0035] The present invention will be described in detail below with reference to specific embodiments.

[0036] This invention is mainly used to provide a compact dry and wet plasma thawing device with a compact structure, smaller size and weight, and less space required for installation and use. It is used to meet the needs of grassroots production and medical systems for thawing small and medium batches of frozen plasma, enabling more flexible and convenient on-site real-time processing, reducing the need for specialized structures or departments such as blood banks or blood stations, and improving efficiency.

[0037] Its main structure is as follows Figures 1-3 As shown, it includes a housing 1 and a defrosting assembly 2 and an oscillation drive assembly 3 disposed inside the housing 1;

[0038] The shell 1 is a rectangular hollow shell used to support and protect the main structure. In order to ensure that the overall structure is compact and complete and easy to disassemble and assemble, the structure in this application consists of a top cover 10 and a bottom plate 11. An operation window 10a is provided on one side of the top of the cover 10 and an installation window 10b is cut out on the other side. A flip plate 10c is installed at the operation window 10a and a panel mounting shell plate 10d is fastened at the installation window 10b.

[0039] The operation window is used to facilitate the operator to pick up and put down the plasma bag. For easy observation and operation, the operation window 10a is a horizontally set rectangular window. In specific implementation, the flip plate 10c is generally made of transparent material or has an observation window to quickly determine the status of the internal plasma bag.

[0040] In this embodiment, in order to make full use of the internal structure, reduce the fixed structure, and improve the structural stability, the design size of the operation window 10a matches the size of the thawing water tank 21. The lower edge of the operation window 10a extends downward to form a limiting eave 10e, which forms a rectangular slot. The upper side of the thawing water tank 21 is fastened in the rectangular slot. By limiting the position of the limiting eave 10e, it is possible to ensure that the operation window and the thawing water tank are aligned, simplifying the assembly difficulty, and connecting them into a whole, thereby improving the stability of the thawing water tank 21.

[0041] Furthermore, to improve the stability of the shell connection and simplify the assembly process, a connecting strip 110 is provided on the inner edge of the base plate 11, and lower connecting holes 111 are evenly provided on the connecting strip 110; the lower end of the cover 10 is open and the edge of the opening is provided with upper connecting holes 100 that mate with the lower connecting holes 111. The connecting strip serves as a connecting structure on the one hand and as a guide and positioning structure for insertion on the other hand, thereby improving the efficiency of shell assembly and ensuring the correct structural position.

[0042] The defrosting component 2 includes a water tank 20, a defrosting water tank 21, and a circulating water pump 22.

[0043] Water tank 20 is fixed to base plate 11; thawing water tank 21 is fixed to the upper side of water tank 20 with its opening facing the operation window 10a. One side of thawing water tank 21 extends from the upper surface of water tank 20, and the extended part of the bottom surface of thawing water tank 21, together with the side of water tank 20 and the inner wall of nearby cover 10, forms an installation cavity; circulating water pump 22 is installed in the installation cavity, and its bottom is connected to base plate 11; water inlet pipe head 20a and water outlet pipe head 20b are provided on the shell wall of water tank 20 on one side of the installation cavity, and the bottom of water tank 20... A drain pipe head 20c is provided; an inlet pipe 100a connected to an inlet pipe head 20a and an outlet pipe head 20b are provided on the rear side wall of the cover 10; a strip-shaped flow guide hood 23 is provided on the lower rear side of the thawing water tank 21, the strip-shaped flow guide hood 23 is fastened to the outer wall of the thawing water tank 21, and inlet holes 21a are evenly provided in the corresponding area of ​​the outer wall of the thawing water tank 21; a connecting pipe head 21b is provided on the strip-shaped flow guide hood 23; the outlet pipe head 20b is connected to the connecting pipe head 21b through a circulating water pump 22;

[0044] A return water tank 24 is provided above the front side of the thawing water tank 21. The rear wall of the return water tank 24 is formed by the front shell wall of the thawing water tank 21, and water outlet holes 21c are evenly arranged on the shell wall of the return water tank 24. A return water pipe 21d connected to the water tank 20 is provided at the bottom of the return water tank 24.

[0045] The unique inlet / outlet and return water structure allows the inlet / outlet structure to be integrated with the defrosting water tank, eliminating the need for additional fixing and support structures. This improves inlet / outlet water efficiency, shortens the circulation path, and enhances circulation efficiency. The defrosting water tank is directly mounted on the water tank, enabling direct heat exchange between the defrosting water in the tank and the defrosting water itself. This simplifies assembly and improves the system's thermal circulation efficiency. Furthermore, the offset design allows for the installation of heat-generating electrical control systems on the other side of the outflow, utilizing the water tank and the adjacent defrosting water tank for cooling and heat dissipation, reducing equipment heat generation and improving system stability.

[0046] The bottom-inlet and top-outlet water design, along with the strip-shaped inlet and outlet structure, ensures that the thawing tank can fully circulate and disperse water, improving the uniformity of internal temperature and ensuring that the plasma bags can thaw evenly and stably.

[0047] In this embodiment, the water tank 20 also serves as a frame structure. To improve stability and ensure sufficient installation support space, the water tank 20 has a flat drawer-shaped structure, with its upper horizontal large end face forming an installation plane. The width of the thawing water tank 21 is smaller than the width of the installation plane and is installed in the middle of the installation plane so that the front and rear sides of the installation plane are exposed.

[0048] The exposed portion of the mounting plane at the front, together with the cover and the front wall of the thawing water tank 21, forms a return water mounting cavity; the exposed portion of the mounting plane at the rear, together with the cover and the rear wall of the thawing water tank 21, forms a water inlet mounting cavity.

[0049] The return water tank 24 is set in the return water installation cavity. The return water pipe 21d passes through the bottom of the return water tank 24, goes down through the exposed part on the front side of the installation plane, and returns to the water tank 20. A liquid level switch installation hole is also dug out on the exposed part on the front side of the installation plane. A liquid level switch 21f is installed in the liquid level switch installation hole. A water tank drain valve 25 controlled by the liquid level switch is set on the side of the water tank 20.

[0050] Among them, the strip-shaped flow guide shroud 23 is located on the lower side of the water inlet installation cavity, and the oscillation drive assembly 3 is located on the upper side of the water inlet installation cavity.

[0051] Through the aforementioned structural design, the adjacent structures and structural layout are fully utilized to effectively reduce the additional supporting and fixing structures. At the same time, the distance between each functional component and the connecting pipelines are made simpler, more compact and shorter. While reducing the size and weight of the equipment, simplifying the structure and reducing the number of parts, the system control and response speed are effectively improved, making it more flexible and efficient.

[0052] In this application, the oscillation drive assembly 3 includes a mounting plate 30 fixed to the rear side of the defrosting water tank 21, and a drive motor 31, an eccentric wheel 32, a connecting rod 33, a linear guide slider pair 34, and a movable bracket 35 disposed on the mounting plate 30.

[0053] The linear guide slider pair 34 is fixed on the upper side of the mounting plate 30 and extends along the length of the thawing water tank 21. The movable bracket 35 is fixedly connected to the slider. The drive motor 31 is mounted on the mounting plate 30 and close to one end of the guide rail. The main shaft of the eccentric wheel 32 is connected to the motor shaft of the drive motor 31. The two ends of the connecting rod 33 are respectively connected to the eccentric shaft of the eccentric wheel 32 and the movable bracket 35.

[0054] The use of an eccentric wheel and connecting rod drive effectively compresses the volume of the oscillation structure. Combined with the guide rail and slider structure, this makes the entire oscillation structure more compact and stable, ensuring the long-term stable operation of the motion mechanism.

[0055] The thawing tank of this device can directly hold frozen plasma bags, or it can be used with plasma holding baskets or other structures for thawing. It can also be used with structures such as water-proof bags to meet the thawing needs of plasma bags in different states.

[0056] Furthermore, in order to facilitate the fixed installation of plasma bags and meet both dry and wet thawing requirements, in this embodiment, the movable bracket 35 is also provided with a horizontal support plate 350. The horizontal support plate 350 is evenly provided with a number of strip-shaped installation ports 351 extending in the left and right directions. Strip-shaped fixing holes 352 are provided on the front and rear sides of the strip-shaped installation ports 351.

[0057] Horizontal support plates are used to support and fix the isolation kit for isolating plasma bags and thawing water to meet the requirements of dry thawing. The isolation kit includes... Figure 6 As shown, it includes a water-proof bag 353, a fixing ring 354, and a positioning strip 355;

[0058] The fixing ring 354 is inserted into the strip mounting port 351, and the front and rear sides of the fixing ring 354 are provided with buckles that can be inserted into the strip fixing hole 352;

[0059] A water-proof bag 353 is placed inside the strip-shaped installation port 351. The upper end of the water-proof bag 353 is open and the edge of the opening is pressed against the horizontal support plate 350 by the fixing ring 354.

[0060] The positioning strip 355 has a U-shaped structure. The top of the two vertical arms of the positioning strip 355 is provided with claw buckles that can be attached to the fixing ring 354. The lower side of the positioning strip 355 extends into the water-proof bag 353.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A compact wet / dry plasma thawer characterized by, The shell (1) and the thawing assembly (2) and the oscillation driving assembly (3) arranged in the shell (1) are included. The shell (1) is a rectangular hollow shell, including a top cover (10) and a bottom plate (11), the top cover (10) is provided with an operation window (10a) on one side and an installation window (10b) on the other side, the operation window (10a) is provided with a flap (10c), and the installation window (10b) is provided with a panel mounting shell plate (10d). The thawing assembly (2) includes a water tank (20), a thawing water tank (21) and a circulating water pump (22). The water tank (20) is fixed on the bottom plate (11), the thawing water tank (21) is fixed on the upper side of the water tank (20) and the slot is opposite to the operation window (10a), one side of the thawing water tank (21) extends from the upper end surface of the water tank (20), and the bottom surface of the thawing water tank (21) extends from the water tank (20) and the side wall of the cover (10) to form an installation cavity. The water tank (20) is arranged on the shell wall on one side of the installation cavity and provided with a water inlet pipe head (20a) and a water outlet pipe head (20b), and the bottom of the water tank (20) is provided with a sewage pipe head (20c). The rear shell wall of the cover (10) is provided with a water inlet pipe (100a) connected to the water inlet pipe head (20a) and a water outlet pipe head (20b); the rear lower side of the thawing water tank (21) is provided with a strip-shaped flow guide cover (23), the strip-shaped flow guide cover (23) is connected to the outer wall of the thawing water tank (21), the outer wall of the thawing water tank (21) is uniformly provided with water inlet holes (21a), and the strip-shaped flow guide cover (23) is provided with a connecting pipe head (21b); the water outlet pipe head (20b) is communicated with the connecting pipe head (21b) through the circulating water pump (22). The front upper side of the thawing water tank (21) is provided with a water return tank (24), the rear wall surface of the water return tank (24) is formed by the front shell wall of the thawing water tank (21), and the shell wall forming the water return tank (24) is uniformly provided with water outlet holes (21c); the bottom of the water return tank (24) is provided with a water return pipe (21d) communicated to the water tank (20). The oscillation driving assembly (3) includes a mounting plate (30) fixed on the rear side of the thawing water tank (21), a driving motor (31), an eccentric wheel (32), a connecting rod (33), a linear guide rail sliding block pair (34) and a movable support (35) arranged on the mounting plate (30). The linear guide rail sliding block pair (34) is fixed on the upper side of the mounting plate (30) and extends along the length direction of the thawing water tank (21), the movable support (35) is fixedly connected with the sliding block, the driving motor (31) is installed on the mounting plate (30) and close to one end of the guide rail, the main shaft of the eccentric wheel (32) is connected with the motor shaft of the driving motor (31), and the connecting rod (33) is connected with the eccentric shaft of the eccentric wheel (32) and the movable support (35) at two ends.

2. The compact plasma thawing apparatus according to claim 1, characterized in that The water tank (20) is a flat drawer-shaped structure, the upper end of which is provided with a mounting plane formed by a horizontal large end face; the thawing water tank (21) has a width smaller than that of the mounting plane and is mounted in the middle of the mounting plane so that the front and rear sides of the mounting plane are exposed; The front side of the mounting plane is surrounded by the shell and the front side wall of the thawing water tank (21) to form a return water installation cavity; the rear side of the mounting plane is surrounded by the shell and the rear side wall of the thawing water tank (21) to form a water inlet installation cavity.

3. The compact plasma thawing apparatus according to claim 2, characterized in that The return water tank (24) is arranged in the return water installation cavity, the return water pipe (21d) passes through the bottom of the return water tank (24) and then passes through the front side of the mounting plane to return to the water tank (20); the front side of the mounting plane is also provided with a liquid level switch mounting hole, and a liquid level switch (21f) is arranged in the liquid level switch mounting hole; the side of the water tank (20) is provided with a water tank drain valve (25) controlled by the liquid level switch.

4. The compact plasma thawing apparatus according to claim 2, characterized in that, The strip-shaped flow guide cover (23) is arranged on the lower side of the water inlet installation cavity, and the oscillation driving assembly (3) is arranged on the upper side of the water inlet installation cavity.

5. The compact plasma thawing apparatus according to claim 1, characterized in that, The edge of the bottom plate (11) is provided with a connecting strip (110), and the connecting strip (110) is uniformly provided with a lower connecting hole (111); the lower end of the shell (10) is provided with an upper connecting hole (100) matched with the lower connecting hole (111).

6. The compact plasma thawing apparatus according to claim 1, characterized in that The operation window (10a) is a horizontally arranged rectangular window, the size of the operation window (10a) is matched with the size of the thawing water tank (21), the lower edge of the operation window (10a) extends downward to form a limiting eave (10e), the limiting eave (10e) surrounds a rectangular notch, and the upper side of the thawing water tank (21) is buckled in the rectangular notch.

7. The compact plasma thawing apparatus according to claim 1, characterized in that The movable support (35) comprises a horizontal support plate frame (350), and a plurality of strip-shaped mounting holes (351) extending in the left-right direction are uniformly arranged on the horizontal support plate frame (350); strip-shaped fixing holes (352) are arranged on the front and rear sides of the strip-shaped mounting hole (351); The oscillation driving assembly (3) further comprises an isolation kit arranged in each strip-shaped mounting hole (351); the isolation kit comprises a waterproof bag (353), a fixing ring (354), and a positioning strip (355); The fixing ring (354) is inserted into the strip-shaped mounting hole (351), and the front and rear sides of the fixing ring (354) are provided with buckles that can be inserted into the strip-shaped fixing holes (352); The waterproof bag (353) is arranged in the strip-shaped mounting hole (351), and the upper end of the waterproof bag (353) is open and the opening edge is tightly pressed on the horizontal support plate frame (350) by the fixing ring (354); The positioning strip (355) has a U-shaped structure, two vertical arms of the positioning strip (355) are provided with pawls that can be hung on the fixing ring (354), and the lower side of the positioning strip (355) extends into the waterproof bag (353).

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