CN115753225A

CN115753225A - Biological cell sap collector capable of preventing end pollution

Info

Publication number: CN115753225A
Application number: CN202211316301.6A
Authority: CN
Inventors: 杜玉琨
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-03-07

Abstract

The invention discloses a biological cell sap collector capable of preventing end pollution, which comprises a collecting pipe, wherein a fixing plate is arranged on the outer side of the lower end of the collecting pipe, and the lower end of the collecting pipe is connected with a collecting head; further comprising: the collecting tank is arranged inside the right side of the collecting pipe, a filter screen is arranged inside the collecting tank below, a one-way valve is arranged inside the collecting tank, and the one-way valve arranged inside the collecting tank is arranged above the filter screen. This prevent biological cell sap collector of tip pollution is provided with the guard plate, and the drive shift ring removes, alright control bracing piece removes to drive gear drives coaxial coupling's guard plate and rotates, realizes opening and shutting in a flexible way of guard plate, and the guard plate is when closing, and the guard plate of waiting angular distribution surrounds the tip at the gathering head, can avoid the tip pollution of gathering head, thereby avoids polluting the cell sap in the collector when the collector pumps and discharges the cell sap.

Description

Biological cell sap collector capable of preventing end pollution

Technical Field

The invention relates to the technical field of biological cell sap collectors, in particular to a biological cell sap collector capable of preventing end pollution.

Background

Biological cell sap refers to the fluid in the vacuole of plant cells, and in order to conduct an in-depth study on biological cells, a cell sap collector is used to extract biological cell sap and to detect and analyze the internal components of the biological cell sap.

Wherein publication No. CN216349779U is named as a collection component of cell sap samples, comprising: the cell liquid sample collection device comprises a collection bottle and a filter cup used for taking a cell liquid sample from the collection bottle; the collection bottle comprises a bottle body, a bottle cap and a sealing element; the bottle cap is arranged at the top end of the bottle body, and the sealing element is arranged at the top end of the bottle cap; the bottle cap comprises a cap body, wherein an annular bulge is arranged at the upper part of the cap body, and the annular bulge and the cap body form a liquid discharge groove; the size of the outer wall of the filter cup is matched with that of the annular bulge, and the filter cup is placed in the liquid discharge groove to take out a cell liquid sample; an air inlet hole for guiding air is formed in the cover body; the air inlet is arranged beside the annular bulge. The utility model discloses a collection subassembly overall structure of cell sap sample is simple, draws the cell sap sample through the mode that adopts the negative pressure extraction, has realized drawing the contactless of cell sap sample, has avoided secondary pollution, has simplified operating procedure simultaneously, has improved work efficiency, and through setting up the filter screen in the pipe, be convenient for filter impurity and mucus in the cell sap to can seal the bottle lid through setting up the sealing member, thereby prevent that the cell sap sample in the bottle from receiving the pollution.

Only single among the prior art scheme among the above-mentioned utilizes the filter screen to realize the separation of cell sap impurity and mucus, but does not do the separation clearance that becomes more meticulous to impurity after the separation and mucus, need use the slide to dip in and get cell impurity and go on, and this process is comparatively inconvenient to the biological cell sap that contains many cell impurity extracts the special use.

Can seal the bottle lid through setting up the sealing member among the above-mentioned prior art scheme to prevent that the cell sap sample in the bottle body from receiving the pollution, nevertheless do not do anti-pollution processing to the tip of extraction cell sap, the extraction tip receives the pollution, can pollute the cell sap simultaneously when carrying out suction, discharge to the cell sap, therefore we have provided a biological cell sap collector of preventing the tip pollution to solve the above-mentioned problem of proposing.

Disclosure of Invention

The invention aims to provide a biological cell sap collector capable of preventing end pollution, which aims to solve the problems that the separation of cell sap impurities and mucus is realized only by singly utilizing a filter screen in the current market, but the impurities and the mucus after separation are not finely separated and cleaned, a slide is required to dip the cell impurities, the process is inconvenient for extracting the biological cell sap containing multi-cell impurities, the end part for extracting the cell sap is not subjected to anti-pollution treatment, the end part for extracting the cell sap is polluted, and the cell sap can be simultaneously polluted when being sucked and discharged.

In order to achieve the purpose, the invention provides the following technical scheme: a biological cell sap collector capable of preventing end pollution comprises a collecting pipe, wherein a fixing plate is arranged on the outer side of the lower end of the collecting pipe, and the lower end of the collecting pipe is connected with a collecting head;

further comprising:

the collecting tank is arranged in the right of the collecting pipe, a filter screen is arranged in the collecting tank below the collecting tank, a one-way valve is arranged in the collecting tank, and the one-way valve arranged in the collecting tank is arranged above the filter screen;

the collecting piston is connected to the inner part above the collecting groove in a sliding manner, and the upper side of the collecting piston is connected with a piston rod a;

the cleaning groove is formed in the left inner part of the collecting pipe, a cleaning piston is connected to the inner side of the cleaning groove in a sliding mode, and a piston rod b is connected to the upper side of the cleaning piston;

the collecting pipe comprises a collecting pipe, a mounting plate and a connecting rod, wherein the collecting pipe is mounted on the upper side of the collecting pipe, a rotating shaft is rotatably connected to the front side of the upper end of the mounting plate, an adjusting rod is mounted at the other end of the rotating shaft, adjusting pipe sleeves are slidably sleeved at the left end and the right end of the adjusting rod, the outer sides of the adjusting pipe sleeves are hinged and connected with the connecting rod, the other end of the connecting rod at the right position is hinged and connected with the upper end of a piston rod a, and the other end of the connecting rod at the left position is hinged and connected with the upper end of a piston rod b;

the conveying pipe is arranged on the right side of the collecting pipe, the other end of the conveying pipe is arranged on the right side of the collecting head, and the one-way valves are arranged on the collecting head and the conveying pipe;

the cleaning pipe is arranged on the left side of the collecting pipe, and the one-way valves are arranged on the cleaning pipe and at the positions of the joints between the cleaning groove and the collecting groove.

Preferably, a moving ring is sleeved on the outer side of the collecting pipe, a compression spring is connected to the lower side of the moving ring, the lower end of the compression spring is connected with the fixed plate, a rotating rod is rotatably connected to the inner side of the edge of the fixed plate, a gear is connected to the outer side of the rotating rod in a key manner, a support frame is installed on the outer side of the rotating rod, and a protection plate is installed at the other end of the support frame;

the lower side of the moving ring is connected with a supporting rod, a tooth block is installed on the outer side of the supporting rod, and the tooth block is meshed with the gear.

Preferably, the piston rod a and the piston rod b are distributed in parallel, and the piston rod a and the piston rod b are mutually linked through the rotatable adjusting rod, so that the synchronous movement between the piston rod a and the piston rod b can be realized, and the piston rod a and the piston rod b are controlled to move up and down oppositely.

Preferably, the adjusting pipe sleeve slides relative to the adjusting rod, and the adjusting pipe sleeve is movably connected with the piston rod a and the piston rod b through the connecting rods which are hinged, so that the piston rod a and the piston rod b can be moved smoothly, and the phenomenon of locking between the piston rod a and the adjusting rod b is avoided.

Preferably, the conveying pipe is of a C-shaped structure, the upper end of the conveying pipe penetrates through the side wall of the collecting pipe and is arranged between the collecting piston and the one-way valve, and the lower end of the conveying pipe penetrates through the side wall of the collecting head and is arranged below the one-way valve, so that cell sap in the collecting groove can be smoothly conveyed to the collecting head along the conveying pipe to be discharged, and the cell sap is discharged from the collecting head after pollution prevention, and is prevented from being polluted.

Preferably, the shift ring through the angular distribution such as the compression spring with the fixed plate constitutes elastic structure, just shift ring and inside run through sliding connection about the conveyer pipe, this design can be nimble adjust the position of shift ring, and avoid the conveyer pipe to hinder the shift ring removal.

Preferably, the support rods are distributed at equal angles relative to the longitudinal center line of the moving ring, the support rods and the compression springs are distributed in a staggered mode, the design can avoid the mutual obstruction of the compression springs and the support rods, and the two support rods can be separated smoothly.

Preferably, the tooth blocks are distributed at the joint of the supporting rod and the gear at equal intervals, the gear is coaxially connected with the supporting frame, and the gear can be driven to rotate when the supporting rod moves, so that the supporting frame is driven to rotate, and the protection plates are opened and closed.

Preferably, the protection plate is of a fan-shaped structure, the protection plate and the fixing plate form a rotating structure through the U-shaped support frame, and the support rod can penetrate through the hollow position in the middle of the support frame.

Compared with the prior art, the invention has the beneficial effects that:

(1) The biological cell sap collector capable of preventing end pollution is provided with the collecting groove and the cleaning groove, can clean cells sucked by the cleaning groove out of the cell sap collector by driving the collecting piston and the cleaning piston to move reversely at the same time when sucking and filtering cell sap, and can collect the separated cells into the cleaning groove by using the cleaning piston when pushing and discharging the separated cell sap, so that the separation and the separate cleaning of the cell sap and the cells are realized, only one pushing force or pulling force is needed for realizing the separation and the cleaning of the cell sap and facilitating the subsequent cyclic utilization of the collector;

(2) This prevent biological cell sap collector of tip pollution is provided with the guard plate, and the drive shift ring removes, alright control bracing piece removes to drive gear drives coaxial coupling's guard plate and rotates, realizes opening and shutting in a flexible way of guard plate, and the guard plate is when closing, and the guard plate of waiting angular distribution surrounds the tip at the gathering head, can avoid the tip pollution of gathering head, thereby avoids polluting the cell sap in the collector when the collector pumps and discharges the cell sap.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 4 is a schematic view of the main cross-sectional structure of the present invention;

FIG. 5 is a schematic side sectional view of the present invention;

FIG. 6 is an enlarged view of the structure of FIG. 5 at C according to the present invention;

FIG. 7 is a schematic bottom view of the present invention;

FIG. 8 is a bottom view of the present invention.

In the figure: 1. a collection tube; 2. a fixing plate; 3. a pick head; 4. a collection tank; 5. a filter screen; 6. collecting a piston; 7. a piston rod a; 8. mounting a plate; 9. a rotating shaft; 10. adjusting a rod; 11. adjusting the pipe sleeve; 12. a connecting rod; 13. a piston rod b; 14. cleaning the piston; 15. cleaning the groove; 16. a one-way valve; 17. a delivery pipe; 18. cleaning the pipe; 19. a compression spring; 20. a moving ring; 21. a support bar; 22. a tooth block; 23. a rotating rod; 24. a gear; 25. a support frame; 26. and (4) a protection plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides the following technical solutions: a biological cell sap collector for preventing end pollution,

example 1:

the separation of the impurities in the cell sap and the mucus is realized only by singly utilizing the filter screen 5, but the impurities and the mucus after the separation are not finely separated and cleaned, the cell impurities need to be dipped by a glass slide, and the process is inconvenient for the special extraction of the biological cell sap containing the multicellular impurities, so in order to solve the technical problem, the embodiment also comprises a collecting tube 1, a fixing plate 2 is arranged on the outer side of the lower end of the collecting tube 1, and the lower end of the collecting tube 1 is connected with a collecting head 3; the collecting tank 4 is arranged in the right of the collecting pipe 1, a filter screen 5 is arranged in the collecting tank 4, a one-way valve 16 is arranged in the collecting tank 4, and the one-way valve 16 arranged in the collecting tank 4 is arranged above the filter screen 5; the collection piston 6 is connected to the inside above the collection groove 4 in a sliding manner, and the upper side of the collection piston 6 is connected with a piston rod a7; a cleaning groove 15 which is arranged in the left side of the collecting pipe 1, the inner side of the cleaning groove 15 is connected with a cleaning piston 14 in a sliding manner, and the upper side of the cleaning piston 14 is connected with a piston rod b13; the mounting plate 8 is mounted on the upper side of the collecting pipe 1, the front side of the upper end of the mounting plate 8 is rotatably connected with a rotating shaft 9, the other end of the rotating shaft 9 is provided with an adjusting rod 10, the left end and the right end of the adjusting rod 10 are both slidably sleeved with adjusting pipe sleeves 11, the outer sides of the adjusting pipe sleeves 11 are hinged and connected with connecting rods 12, the other end of the connecting rod 12 at the right position is hinged and connected with the upper end of a piston rod a7, and the other end of the connecting rod 12 at the left position is hinged and connected with the upper end of a piston rod b13; the conveying pipe 17 is arranged on the right side of the collecting pipe 1, the other end of the conveying pipe 17 is arranged on the right side of the collecting head 3, and the collecting head 3 and the conveying pipe 17 are both provided with one-way valves 16; the cleaning pipe 18 is arranged on the left side of the collecting pipe 1, and the positions of the cleaning pipe 18, the connecting positions of the cleaning groove 15 and the collecting groove 4 are all provided with one-way valves 16.

The piston rod a7 and the piston rod b13 are distributed in parallel, and the piston rod a7 and the piston rod b13 are mutually linked through the rotatable adjusting rod 10. The adjusting pipe sleeve 11 slides with the adjusting rod 10, and the adjusting pipe sleeve 11 is movably connected with the piston rod a7 and the piston rod b13 through a connecting rod 12 in hinged connection. The delivery tube 17 is "C" shaped and the upper end of the delivery tube 17 extends through the side wall of the collection tube 1 and is disposed between the collection piston 6 and the one-way valve 16, and the lower end of the delivery tube 17 extends through the side wall of the collection head 3 and is disposed below the one-way valve 16.

The working principle of the embodiment is as follows: according to the illustration in fig. 2-4, the piston rod a7 is pulled upwards, the piston rod a7 controls the collection piston 6 to move upwards, the negative pressure in the collection tank 4 changes, the one-way valve 16 installed in the collection tank 4 and the one-way valve 16 installed in the collection head 3 open, the cell fluid can enter the collection tank 4 along the collection head 3 and be separated from the cells therein by the filter screen 5, the cell fluid is collected to the upper position of the one-way valve 16 in the collection tank 4, the cells stay at the lower position of the filter screen 5, when the piston rod a7 moves upwards, the connecting rod 12 connected with the upper end of the piston rod a7 in a hinged manner rotates, the connecting rod 12 controls the adjusting pipe sleeve 11 connected with the other end in a hinged manner to slide outside the adjusting rod 10, so that the adjusting rod 10 starts to rotate, the adjusting rod 10 rotates on the mounting plate 8 through the rotating shaft 9, the adjusting pipe sleeve 11 slides synchronously along the adjusting pipe sleeve 11, the adjusting pipe sleeve 11 pushes the piston rod b13 to move downwards through the connecting rod b13, the cleaning piston rod b13 controls the cleaning piston 14 installed at the lower end to move downwards, the cleaning piston rod b13 controls the cleaning piston 14 to move downwards, the cleaning pipe 16 in the collection tank 4 to open, the one-way valve 16 and the cleaning pipe 16 is opened, the cleaning pipe 16 is closed, the collection tank 4, the cleaning pipe 16 is closed, the cleaning pipe 16 in the collection tank 4, the collection valve 16, the cleaning pipe 16 is closed, the collection tank 4, the cleaning pipe 16 is closed, at this time, the cells below the filter screen 5 can be collected in the cleaning tank 15, so that the cells are prevented from remaining in the collection tank 4 to influence the subsequent collection.

Example 2:

the bottle cap can be sealed by arranging a sealing element, so that a cell sap sample in the bottle body is prevented from being polluted, but the end part for extracting the cell sap is not subjected to anti-pollution treatment, the extracted end part is polluted, and the cell sap can be synchronously polluted when being sucked and discharged, so that in order to solve the technical problem, the embodiment further comprises a movable ring 20 sleeved on the outer side of the acquisition tube 1, a compression spring 19 is connected to the lower side of the movable ring 20, the lower end of the compression spring 19 is connected with the fixed plate 2, a rotating rod 23 is rotatably connected to the inner side of the edge of the fixed plate 2, a gear 24 is connected to the outer side of the rotating rod 23 in a key mode, a support frame 25 is installed on the outer side of the rotating rod 23, and a protection plate 26 is installed at the other end of the support frame 25; a support rod 21 is connected to the lower side of the moving ring 20, a tooth block 22 is installed on the outer side of the support rod 21, and the tooth block 22 is engaged with a gear 24.

The moving ring 20 and the fixed plate 2 form an elastic structure by compression springs 19 distributed at equal angles, and the moving ring 20 is connected with the conveying pipe 17 penetrating through the moving ring in a vertical sliding mode. The support bars 21 are equiangularly distributed about the longitudinal center line of the moving ring 20, and the support bars 21 and the compression springs 19 are staggered with each other. The gear blocks 22 are distributed at equal intervals at the joint of the support rod 21 and the gear 24, and the gear 24 and the support frame 25 are coaxially connected. The protection plate 26 is a fan-shaped structure, the protection plate 26 forms a rotating structure with the fixing plate 2 through the U-shaped support frame 25, and the support rod 21 can be penetrated through the hollow position in the middle of the support frame 25.

The working principle of the embodiment is as follows: the whole device shown in figure 1 is carried to a working area, a moving ring 20 is pressed downwards, the moving ring 20 extrudes a compression spring 19, the compression spring 19 starts to store force, meanwhile, the moving ring 20 controls a supporting rod 21 connected with the lower side to move downwards, as shown in figures 5-6, a tooth block 22 arranged on the outer side of the supporting rod 21 is meshed with a gear 24 to be connected, the gear 24 drives the gear 24 to rotate, the gear 24 controls a rotating rod 23 connected with an inner side key to rotate, the rotating rod 23 can control a supporting frame 25 arranged on the outer side to rotate, the supporting frame 25 controls a protection plate 26 arranged at the lower end to move towards the direction far away from a collecting head 3, the protection of the collecting head 3 by the protection plate 26 is removed, the collecting head 3 is clamped in a port of a cell sap storage bottle, the protection plate 26 is sleeved outside the cell sap storage bottle, when the moving ring 20 is released, the compression spring 19 can control the moving ring 20 to move upwards to reset, thereby controlling the supporting rod 21 to move upwards, the protection plate 26 to reset, the gear 24 controls the protection plate 26 coaxially connected to rotate backwards, the protection plate 26 is tightly attached to the outside of the cell sap storage bottle, the collector can be used for extracting the cell sap, a subsequent cell sap, the cell sap ring 20 is directly pressed, the anti-pollution collecting head is removed, the end of the collecting head is removed, and the collecting head 26, and the collecting head is arranged on the collecting head, and the collecting head is arranged on the collecting head.

Those not described in detail in this specification are well within the skill of the art.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. A biological cell sap collector capable of preventing end pollution comprises a collecting pipe (1), wherein a fixing plate (2) is arranged on the outer side of the lower end of the collecting pipe (1), and the lower end of the collecting pipe (1) is connected with a collecting head (3);

the method is characterized in that: further comprising:

the collecting tank (4) is arranged in the right of the collecting pipe (1), a filter screen (5) is arranged in the collecting tank (4) below, a one-way valve (16) is arranged in the collecting tank (4), and the one-way valve (16) arranged in the collecting tank (4) is arranged above the filter screen (5);

the collection piston (6) is connected to the inner part above the collection groove (4) in a sliding manner, and the upper side of the collection piston (6) is connected with a piston rod a (7);

the cleaning groove (15) is formed in the left inner part of the collecting pipe (1), a cleaning piston (14) is connected to the inner side of the cleaning groove (15) in a sliding mode, and a piston rod b (13) is connected to the upper side of the cleaning piston (14);

the collecting pipe comprises a mounting plate (8) which is mounted on the upper side of the collecting pipe (1), the front side of the upper end of the mounting plate (8) is rotatably connected with a rotating shaft (9), the other end of the rotating shaft (9) is provided with an adjusting rod (10), the left end and the right end of the adjusting rod (10) are slidably sleeved with an adjusting pipe sleeve (11), the outer side of the adjusting pipe sleeve (11) is hinged with a connecting rod (12), the other end of the connecting rod (12) at the right position is hinged with the upper end of a piston rod a (7), and the other end of the connecting rod (12) at the left position is hinged with the upper end of a piston rod b (13);

a delivery tube (17) mounted to the right side of the pick tube (1), and the other end of the delivery tube (17) is mounted to the right side of the pick head (3), and the one-way valve (16) is mounted to both the pick head (3) and the delivery tube (17);

the cleaning pipe (18) is installed on the left side of the collecting pipe (1), and the one-way valves (16) are installed on the cleaning pipe (18) and at the positions of the joints between the cleaning groove (15) and the collecting groove (4).

2. The biological cell liquid collector for preventing end contamination according to claim 1, wherein: a moving ring (20) is sleeved on the outer side of the collecting pipe (1), a compression spring (19) is connected to the lower side of the moving ring (20), the lower end of the compression spring (19) is connected with the fixed plate (2), a rotating rod (23) is rotatably connected to the inner side of the edge of the fixed plate (2), a gear (24) is connected to the outer side key of the rotating rod (23), a supporting frame (25) is installed on the outer side of the rotating rod (23), and a protection plate (26) is installed at the other end of the supporting frame (25);

a support rod (21) is connected to the lower side of the moving ring (20), a tooth block (22) is installed on the outer side of the support rod (21), and the tooth block (22) is meshed with the gear (24).

3. The biological cell liquid collector for preventing end pollution according to claim 1, characterized in that: the piston rod a (7) and the piston rod b (13) are distributed in parallel, and the piston rod a (7) and the piston rod b (13) are mutually linked through the rotatable adjusting rod (10).

4. The biological cell liquid collector for preventing end contamination according to claim 1, wherein: the adjusting pipe sleeve (11) slides with the adjusting rod (10), and the adjusting pipe sleeve (11) is movably connected with the piston rod a (7) and the piston rod b (13) through the connecting rod (12) in hinged connection.

5. The biological cell liquid collector for preventing end contamination according to claim 1, wherein: the delivery tube (17) is of a 'C' -shaped structure, and the upper end of the delivery tube (17) penetrates the side wall of the collection tube (1) and is arranged between the collection piston (6) and the one-way valve (16), and the lower end of the delivery tube (17) penetrates the side wall of the collection head (3) and is arranged below the one-way valve (16).

6. The biological cell liquid collector for preventing end contamination according to claim 2, wherein: the moving ring (20) and the fixed plate (2) form an elastic structure through the compression springs (19) which are distributed at equal angles, and the moving ring (20) is connected with the conveying pipe (17) which penetrates through the moving ring and the conveying pipe in an up-and-down sliding mode.

7. The biological cell liquid collector for preventing end contamination according to claim 2, wherein: the support rods (21) are distributed at equal angles relative to the longitudinal center line of the moving ring (20), and the support rods (21) and the compression springs (19) are distributed in a staggered mode.

8. The biological cell liquid collector for preventing end contamination according to claim 2, wherein: the tooth blocks (22) are distributed at the joint of the support rod (21) and the gear (24) at equal intervals, and the gear (24) is coaxially connected with the support frame (25).

9. The biological cell liquid collector for preventing end pollution as claimed in claim 2, characterized in that: the protection plate (26) is of a fan-shaped structure, the protection plate (26) and the fixing plate (2) form a rotating structure through the U-shaped support frame (25), and the middle hollow position of the support frame (25) can penetrate through the support rod (21).