Adjustable infusion apparatus

Abstract

The utility model discloses an adjustable infusion apparatus, and relates to the technical field of medical instruments. An automatic liquid stopping mechanism is arranged in the drip chamber, a puncture needle is fixedly mounted at the top of the drip chamber, an air inlet mechanism is arranged at the joint of the puncture needle and the drip chamber, an infusion tube is fixedly mounted at the bottom of the drip chamber, a dripping speed regulator is arranged on the infusion tube, and the infusion tube is wound around a storage mechanism. The storage mechanism is arranged, the infusion tube is directly sleeved, and the infusion tube is stored, so that the device can freely adjust the using length of the infusion tube according to the requirement of a user, and meanwhile the situation that air enters the infusion tube due to the fact that the medicine amount in a pipeline winding column is insufficient in the prior art is avoided; and the device is provided with an automatic liquid stopping mechanism, so that the situation that blood return occurs due to the fact that the device cannot stop when the medicine amount is insufficient is effectively avoided, and the practicability of the device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to an adjustable infusion set. Background Art

[0002] In the medical industry, disposable infusion sets are widely used. An infusion tube generally consists of a drip chamber assembly, a catheter, a puncture needle, a liquid medicine filter, a flow regulator, a scalp needle, etc.

[0003] The infusion set with adjustable pipeline length provided by Chinese Patent Publication No. CN215995087U includes an infusion pipeline and a pipeline adjusting device. The pipeline adjusting device is provided on the infusion pipeline. The pipeline adjusting device includes a housing, a pipeline winding column, a control member, and a limiting member. A storage cavity is provided inside the housing. The pipeline winding column is rotatably arranged in the storage cavity. The control member is connected to the pipeline winding column. The limiting member is arranged on the housing to limit the control member. A fixed base is provided on the pipeline adjusting device. A clamping structure and a hanging structure are provided on the fixed base. The hanging structure is matched with the pipeline adjusting device. The control member includes an operation button, a limiting wheel, and a connecting convex block. The operation button and the connecting convex block are respectively connected to the limiting wheel. The limiting wheel is arranged in a groove on the housing. The beneficial effect of the utility model is that a pipeline adjusting device is provided to adjust the exposed length of the pipeline, which is convenient for use and adjustment, and at the same time, it is convenient to set up, which can effectively reduce the operation difficulty of medical staff and help improve efficiency.

[0004] In actual use, the liquid medicine will remain in the pipeline winding column, resulting in the inability to use all the liquid medicine in the pipeline winding column. At the same time, when the amount of liquid medicine in the pipeline winding column is insufficient, air will enter the infusion pipeline during the transportation of the liquid medicine, and a fault will occur in the liquid medicine in the infusion pipeline, which has a certain risk in use and is not very practical.

[0005] Therefore, an adjustable infusion set is proposed. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the problem that in actual use, the liquid medicine will remain in the pipeline winding column, resulting in the inability to use all the liquid medicine in the pipeline winding column. At the same time, when the amount of liquid medicine in the pipeline winding column is insufficient, air will enter the infusion pipeline during the transportation of the liquid medicine, and a fault will occur in the liquid medicine in the infusion pipeline, which has a certain risk in use and is not very practical. The utility model provides an adjustable infusion set.

[0007] The utility model specifically adopts the following technical solutions to achieve the above purpose:

[0008] An adjustable infusion set, including a drip chamber, an automatic liquid stop mechanism is arranged in the drip chamber, a puncture needle is fixedly installed at the top of the drip chamber, an air inlet mechanism is arranged at the connection between the puncture needle and the drip chamber, a liquid infusion tube is fixedly installed at the bottom of the drip chamber, a drip speed regulator is arranged on the liquid infusion tube, and the liquid infusion tube is wound around a storage mechanism;

[0009] Specifically, in some embodiments, when an infusion operation needs to be performed, first insert the puncture needle into the medicine bottle at this time. At this time, the medicine liquid enters the drip chamber through the air inlet mechanism. At this time, the medicine liquid in the drip chamber increases, triggering the automatic liquid stop mechanism. At this time, the user first turns on the drip speed regulator, causing the air in the liquid infusion tube to be discharged. At the same time, if the liquid infusion tube needs to be extended, drive the storage mechanism to stretch the liquid infusion tube at this time.

[0010] Further, the air inlet mechanism includes a fixing plate, a grid, a mounting plate, a leakage plate and a first filter membrane. A mounting plate is fixedly installed at the top of the drip chamber. A leakage plate is fixedly installed at the center of the mounting plate. The leakage plate is communicated with the drip chamber. A first filter membrane is placed on the top of the leakage plate. A grid is fixedly installed on the top of the mounting plate on the outer side wall of the first filter membrane. A fixing plate is fixedly installed on the top of the grid. The fixing plate is fixedly connected with the puncture needle. The puncture needle longitudinally penetrates through the fixing plate and the leakage plate and is communicated with the drip chamber;

[0011] Specifically, the first filter membrane covers the leakage plate. During the air inlet operation, it can effectively prevent foreign objects from entering the drip chamber.

[0012] Further, the automatic liquid stop mechanism includes a partition chamber, a pull rope, a floating ball and a second filter membrane. A second filter membrane is placed at the inner bottom of the drip chamber. A partition chamber is fixedly installed on the inner side wall of the drip chamber above the second filter membrane. A floating ball is placed on the partition chamber. A pull rope is fixedly installed on the inner side wall of the partition chamber. The number of pull ropes is several groups and is arranged in a circular array. The free end of the pull rope is fixedly connected with the floating ball. The pull rope is inclined;

[0013] Specifically, when the liquid medicine enters the drip chamber, when the amount of liquid medicine in the drip chamber is sufficient, the liquid medicine triggers the floating ball at this time, causing the partition chamber to be in an open state, so that the liquid medicine can be normally transported.

[0014] Further, the drip speed regulator includes a mounting shell, a rubber anti-slip sleeve, a pressing wheel, a movable block and a movable groove. The mounting shell is sleeved on the liquid infusion tube. Movable grooves are opened on the front and rear inner walls of the mounting shell on one side of the liquid infusion tube. The movable grooves are arranged in an inclined structure. A movable block is slidably installed in the movable grooves. The movable block is arranged in a cylindrical structure. A pressing wheel is fixedly installed on the corresponding side wall of the movable block. A pressing groove is arranged on the outer side wall of the pressing wheel;

[0015] Specifically, the user moves the pressing wheel, causing the pressing wheel to move in the movable groove, so that the pressing wheel squeezes the liquid infusion tube, changing the water flow speed of the liquid infusion tube.

[0016] Furthermore, a rubber anti-slip sleeve is fixedly installed at the connection with the infusion tube on the installation shell, and the rubber anti-slip sleeve is arranged in conformity with the infusion tube;

[0017] Specifically, it effectively avoids the situation that the drip rate regulator slides on the infusion tube.

[0018] Furthermore, the storage mechanism includes storage plates, mounting shafts, limit posts, placement holes, slots, mounting grooves, insertion blocks, chutes, sliders, limit rods, threaded rods and turning handwheels. The number of storage plates is two groups and they are arranged in parallel correspondence. The corresponding side walls of the storage plates are rotatably installed with limit posts. The number of limit posts is four groups and they are arranged in correspondence. The mounting shaft is rotatably installed at the center of the storage plate. A placement hole is opened at the center of the mounting shaft. The infusion tube is located in the placement hole. The infusion tube is located at the intervals of the limit posts. An installation groove is opened on the front side wall of one of the storage plates. A rotating plate is rotatably installed on the rear inner wall of the installation groove. The rotating shaft of the rotating plate horizontally penetrates the installation groove and is fixedly connected with the rotating shaft of the mounting shaft;

[0019] Specifically, the user rotates the rotating plate, causing the mounting shaft to rotate, thereby releasing the infusion tube wound around the mounting shaft.

[0020] Furthermore, a chute is opened on the front side wall of the storage plate directly above the installation groove. The top and bottom of the inner side of the chute are rotatably installed with threaded rods. A slider is arranged inside the chute. The slider is sleeved on the threaded rod and is in threaded connection with the threaded rod. A limit rod is slidably installed at the bottom of the inner side of the chute. The top of the limit rod is fixedly connected with the slider. An insertion block is fixedly installed at one end of the limit rod located inside the installation groove. A plurality of slots are opened on the outer side wall of the rotating plate. The slots are arranged at equal intervals. The slots match the insertion blocks. A turning handwheel is rotatably installed on the top of the storage plate. The rotating shaft of the turning handwheel vertically penetrates the storage plate and is fixedly connected with the threaded rod;

[0021] Specifically, the user rotates the turning handwheel to drive the threaded rod to rotate. At this time, the slider moves longitudinally, causing the limit rod to drive the insertion block to insert into the slot to limit the rotating plate.

[0022] The beneficial effects of the present utility model are as follows:

[0023] 1. By setting the storage mechanism, the present utility model directly sleevs the infusion tube to store and place the infusion tube, enabling the device to freely adjust the use length of the infusion tube according to the needs of the user. At the same time, it also avoids the situation in the comparative technology that the amount of medicine in the pipeline winding column is insufficient, resulting in air entering the infusion tube, greatly improving the practicability of the device. And the device is provided with an automatic liquid stop mechanism, effectively avoiding the situation of blood return when the amount of medicine is insufficient and unable to stop, greatly improving the practicability of the device. Brief Description of the Drawings

[0024] Figure 1 is a schematic three-dimensional structure diagram of the present utility model;

[0025] Figure 2 is a schematic diagram of the position structure of the floating ball of the present utility model;

[0026] Figure 3 is a schematic diagram of the position structure of the pressing wheel of the present utility model;

[0027] Figure 4 is a schematic diagram of the position structure of the installation groove of the present utility model;

[0028] Figure 5 is a schematic diagram of the position structure of the installation shaft of the present utility model;

[0029] Reference Numerals: 1, puncture needle; 2, drip funnel; 3, drip speed regulator; 4, storage mechanism; 5, infusion tube; 6, fixing plate; 7, grid; 8, first filter membrane; 9, leak plate; 10, mounting plate; 11, pull rope; 12, partition funnel; 13, second filter membrane; 14, floating ball; 15, rubber anti-slip sleeve; 16, mounting shell; 17, pressing wheel; 18, moving groove; 19, moving block; 20, dialing handwheel; 21, threaded rod; 22, limiting rod; 23, slider; 24, sliding groove; 25, inserting block; 26, rotating plate; 27, inserting slot; 28, installation groove; 29, limiting column; 30, placing hole; 31, installation shaft; 32, storage plate. Detailed Description of the Preferred Embodiments

[0030] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but is merely representative of selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0033] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", "upper", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.

[0034] As Figures 1 to 5 shown, an adjustable infusion set includes a drip chamber 2, an automatic liquid stop mechanism is arranged in the drip chamber 2, a puncture needle 1 is fixedly installed at the top of the drip chamber 2, an air inlet mechanism is arranged at the connection between the puncture needle 1 and the drip chamber 2, a liquid infusion tube 5 is fixedly installed at the bottom of the drip chamber 2, a drip rate regulator 3 is arranged on the liquid infusion tube 5, and the liquid infusion tube 5 is wound around a storage mechanism 4;

[0035] Specifically, in some embodiments, when an infusion operation needs to be performed, the puncture needle 1 is preferentially inserted into the medicine bottle at this time. At this time, the medicine enters the drip chamber 2 through the air inlet mechanism. At this time, the medicine in the drip chamber 2 increases, triggering the automatic liquid stop mechanism. At this time, the user preferentially opens the drip rate regulator 3, causing the air in the liquid infusion tube 5 to be discharged. At the same time, if the liquid infusion tube 5 needs to be extended, the storage mechanism 4 is driven to stretch the liquid infusion tube 5 at this time.

[0036] As Figures 1 to 5 shown, the air inlet mechanism includes a fixing plate 6, a grid 7, a mounting plate 10, a leakage plate 9 and a first filter membrane 8. The mounting plate 10 is fixedly installed at the top of the drip chamber 2. The leakage plate 9 is fixedly installed at the center of the mounting plate 10. The leakage plate 9 is communicated with the drip chamber 2. The first filter membrane 8 is placed on the top of the leakage plate 9. The grid 7 is fixedly installed on the top of the mounting plate 10 on the outer side wall of the first filter membrane 8. The fixing plate 6 is fixedly installed on the top of the grid 7. The fixing plate 6 is fixedly connected with the puncture needle 1. The puncture needle 1 longitudinally penetrates the fixing plate 6 and the leakage plate 9 and is communicated with the drip chamber 2;

[0037] Specifically, the first filter membrane 8 covers the leakage plate 9. During the air inlet operation, it can effectively prevent foreign matters from entering the drip chamber 2.

[0038] As Figures 1 to 5As shown, the automatic liquid stopping mechanism includes a separation bucket 12, a pull rope 11, a floating ball 14 and a second filter membrane 13. The second filter membrane 13 is placed at the inner bottom of the drip bucket 2, and the inner wall of the drip bucket 2 is located above the second filter membrane 13 and fixedly installed with the separation bucket 12. The floating ball 14 is placed on the separation bucket 12, and the inner wall of the separation bucket 12 is fixedly installed with a pull rope 11. The number of the pull ropes 11 is several groups and they are arranged in a ring array. The free end of the pull rope 11 is fixedly connected to the floating ball 14, and the pull rope 11 is arranged obliquely.

[0039] Specifically, when the liquid medicine enters the drip bucket 2 and the amount of liquid medicine in the drip bucket 2 is sufficient, the liquid medicine triggers the float 14, causing the separation bucket 12 to be in an open state, so that the liquid medicine can be transported normally.

[0040] like Figures 1 to 5 As shown, the drip rate regulator 3 includes a mounting shell 16, a rubber anti-slip sleeve 15, a pressure wheel 17, a movable block 19, and a movable groove 18. The mounting shell 16 is sleeved on the infusion tube 5. The front and rear inner walls of the mounting shell 16 are located on one side of the infusion tube 5 and are provided with a movable groove 18. The movable groove 18 is arranged in an inclined structure. A movable block 19 is slidably installed in the movable groove 18. The movable block 19 is arranged in a cylindrical structure. The corresponding side wall of the movable block 19 is fixedly installed with a pressure wheel 17, and the outer side wall of the pressure wheel 17 is provided with a pressure groove.

[0041] Specifically, the user turns the pressing wheel 17 so that the pressing wheel 17 is located in the movable groove 18 and is movable, thereby causing the pressing wheel 17 to squeeze the infusion tube 5 and change the water flow speed of the infusion tube 5 .

[0042] like Figures 1 to 5 As shown, the mounting shell 16 is located at the connection with the infusion tube 5 and a rubber anti-slip sleeve 15 is fixedly mounted thereon, and the rubber anti-slip sleeve 15 is fitted to the infusion tube 5;

[0043] Specifically, the drip rate regulator 3 is effectively prevented from sliding on the infusion tube 5 .

[0044] like Figures 1 to 5As shown in the figure, the storage mechanism 4 includes a storage plate 32, a mounting shaft 31, a limiting column 29, a placement hole 30, a slot 27, a mounting groove 28, a plug 25, a sliding groove 24, a slider 23, a limiting rod 22, a threaded rod 21, and a turning handwheel 20. The number of storage plates 32 is two groups and they are arranged in parallel correspondence. The corresponding side walls of the storage plates 32 are rotatably installed with limiting columns 29. The number of limiting columns 29 is four groups and they are arranged in correspondence. The mounting shaft 31 is rotatably installed at the center of the storage plate 32. A placement hole 30 is opened at the center of the mounting shaft 31. The infusion tube 5 is located in the placement hole 30. The infusion tube 5 is located at the interval of the limiting columns 29. An installation groove 28 is opened on the front side wall of one of the storage plates 32. A rotating plate 26 is rotatably installed on the rear inner wall of the installation groove 28. The rotating shaft of the rotating plate 26 horizontally penetrates the installation groove 28 and is fixedly connected to the rotating shaft of the mounting shaft 31;

[0045] Specifically, the user rotates the rotating plate 26, causing the mounting shaft 31 to rotate, thereby releasing the infusion tube 5 wound around the mounting shaft 31.

[0046] As Figures 1 to 5 shown in the figure, a sliding groove 24 is opened on the front side wall of the storage plate 32 directly above the installation groove 28. The threaded rod 21 is rotatably installed at the top and bottom of the inner side of the sliding groove 24. The sliding groove 24 is internally provided with a slider 23. The slider 23 is sleeved on the threaded rod 21 and is threadedly connected to the threaded rod 21. A limiting rod 22 is slidably installed at the bottom of the inner side of the sliding groove 24. The top of the limiting rod 22 is fixedly connected to the slider 23. A plug 25 is fixedly installed at one end of the limiting rod 22 located in the installation groove 28. A plurality of slots 27 are opened on the outer side wall of the rotating plate 26. The slots 27 are arranged at equal intervals. The slots 27 match the plugs 25. A turning handwheel 20 is rotatably installed at the top of the storage plate 32. The rotating shaft of the turning handwheel 20 longitudinally penetrates the storage plate 32 and is fixedly connected to the threaded rod 21;

[0047] Specifically, the user rotates the turning handwheel 20 to drive the threaded rod 21 to rotate. At this time, the slider 23 moves longitudinally, causing the limiting rod 22 to drive the plug 25 to insert into the slot 27 to limit the rotating plate 26.

[0048] In summary: In some embodiments, when an infusion operation is required, the puncture needle 1 is preferentially inserted into the medicine bottle. At this time, the medicine enters the drip bucket 2 through the air intake mechanism. At this time, the medicine in the drip bucket 2 increases, triggering the automatic liquid stop mechanism. At this time, the user preferentially turns on the drip rate regulator 3 to exhaust the air in the infusion tube 5. At the same time, if the infusion tube 5 needs to be extended, the storage mechanism 4 is driven to stretch the infusion tube 5. When the medicine enters the drip bucket 2, when the amount of medicine in the drip bucket 2 is sufficient, the medicine triggers the float 14, causing the separation bucket 12 to be open. state, so that the medicine can be delivered normally. The user toggles the pressing wheel 17 so that the pressing wheel 17 is located in the movable groove 18, thereby causing the pressing wheel 17 to squeeze the infusion tube 5 and change the water flow speed of the infusion tube 5. The user rotates the rotating plate 26 to cause the mounting shaft 31 to rotate, thereby releasing the infusion tube 5 wound on the mounting shaft 31. The user drives the threaded rod 21 to rotate by turning the toggle hand wheel 20. At this time, the slider 23 moves longitudinally, causing the limit rod 22 to drive the plug block 25 to insert into the slot 27 to limit the rotating plate 26.

[0049] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An adjustable infusion set, characterized in that, It includes a drip chamber (2), an automatic liquid stop mechanism is arranged inside the drip chamber (2), a puncture needle (1) is fixedly installed at the top of the drip chamber (2), an air inlet mechanism is arranged at the connection between the puncture needle (1) and the drip chamber (2), a transfusion tube (5) is fixedly installed at the bottom of the drip chamber (2), a drip rate regulator (3) is arranged on the transfusion tube (5), and the transfusion tube (5) is wound around a storage mechanism (4).

2. The adjustable infusion set according to claim 1, wherein, The air inlet mechanism includes a fixing plate (6), a grid (7), a mounting plate (10), a leakage plate (9) and a first filter membrane (8). A mounting plate (10) is fixedly installed at the top of the drip chamber (2), a leakage plate (9) is fixedly installed at the center of the mounting plate (10), the leakage plate (9) is communicated with the drip chamber (2), a first filter membrane (8) is placed on the top of the leakage plate (9), a grid (7) is fixedly installed on the top of the mounting plate (10) on the outer sidewall of the first filter membrane (8), a fixing plate (6) is fixedly installed on the top of the grid (7), the fixing plate (6) is fixedly connected with the puncture needle (1), and the puncture needle (1) longitudinally penetrates through the fixing plate (6) and the leakage plate (9) and is communicated with the drip chamber (2).

3. An adjustable infusion set according to claim 1, characterized in that, The automatic liquid stop mechanism includes a partition chamber (12), a pull rope (11), a floating ball (14) and a second filter membrane (13). A second filter membrane (13) is placed on the inner bottom of the drip chamber (2), a partition chamber (12) is fixedly installed on the inner sidewall of the drip chamber (2) above the second filter membrane (13), a floating ball (14) is placed on the partition chamber (12), a pull rope (11) is fixedly installed on the inner sidewall of the partition chamber (12), the number of the pull ropes (11) is several groups and is arranged in a circular array, the free end of the pull rope (11) is fixedly connected with the floating ball (14), and the pull rope (11) is inclined.

4. An adjustable infusion set according to claim 1, characterized in that, The drip rate regulator (3) includes a mounting shell (16), a rubber anti-slip sleeve (15), a pressing wheel (17), a movable block (19) and a movable groove (18). The mounting shell (16) is sleeved on the transfusion tube (5), movable grooves (18) are formed on the front and rear inner walls of the mounting shell (16) on one side of the transfusion tube (5), the movable grooves (18) are of an inclined structure, a movable block (19) is slidably installed in the movable grooves (18), the movable block (19) is of a cylindrical structure, a pressing wheel (17) is fixedly installed on the corresponding sidewall of the movable block (19), and a pressing groove is arranged on the outer sidewall of the pressing wheel (17).

5. An adjustable infusion set according to claim 4, wherein, A rubber anti-slip sleeve (15) is fixedly installed at the connection between the mounting shell (16) and the transfusion tube (5), and the rubber anti-slip sleeve (15) is attached to the transfusion tube (5).

6. An adjustable infusion set according to claim 1, wherein The storage mechanism (4) includes a storage plate (32), a mounting shaft (31), a limiting column (29), a placement hole (30), a slot (27), a mounting groove (28), a plug (25), a sliding groove (24), a sliding block (23), a limiting rod (22), a threaded rod (21), and a turning handwheel (20). The number of storage plates (32) is two groups and they are arranged in parallel correspondence. The corresponding side walls of the storage plates (32) are rotatably mounted with limiting columns (29). The number of limiting columns (29) is four groups and they are arranged in correspondence. The mounting shaft (31) is rotatably mounted at the center of the storage plate (32). A placement hole (30) is opened at the center of the mounting shaft (31). The infusion tube (5) is located in the placement hole (30). The infusion tube (5) is located at the interval of the limiting columns (29). An installation groove (28) is opened on the front side wall of one group of the storage plates (32). A rotating plate (26) is rotatably mounted on the rear inner wall of the installation groove (28). The rotating shaft of the rotating plate (26) horizontally penetrates through the installation groove (28) and is fixedly connected to the rotating shaft of the mounting shaft (31).

7. An adjustable infusion set according to claim 6, characterized in that, A sliding groove (24) is opened on the front side wall of the storage plate (32) directly above the installation groove (28). A threaded rod (21) is rotatably mounted at the top and bottom of the inner side of the sliding groove (24). A sliding block (23) is arranged inside the sliding groove (24). The sliding block (23) is sleeved on the threaded rod (21) and is threadedly connected to the threaded rod (21). A limiting rod (22) is slidably mounted at the bottom of the inner side of the sliding groove (24). The top of the limiting rod (22) is fixedly connected to the sliding block (23). A plug (25) is fixedly mounted at one end of the limiting rod (22) located inside the installation groove (28). A plurality of slots (27) are opened on the outer side wall of the rotating plate (26). The number of slots (27) is several groups and they are arranged at equal intervals. The slots (27) are matched with the plug (25). A turning handwheel (20) is rotatably mounted on the top of the storage plate (32). The rotating shaft of the turning handwheel (20) longitudinally penetrates through the storage plate (32) and is fixedly connected to the threaded rod (21).

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