Feeding net for breeding

Abstract

The utility model relates to the technical field of lobster feeding, and discloses a breeding feeding net which comprises a feed box, a feeding net body is arranged on the front side of the feed box, and a first through hole is formed in the rear side wall face of the feed box; comprising a winding and unwinding device, the winding and unwinding device comprises two sets of rotating rods on the front side and the rear side, the two sets of rotating rods are arranged in a square shape, the two ends of each rotating rod are each fixedly provided with a belt wheel, the winding and unwinding device further comprises a guide plate, and a second penetrating hole is formed in the front side wall face of the guide plate; comprising a feeding device, the feeding device comprises a first rotating cylinder, and the first rotating cylinder is provided with a second rotating cylinder. The feeding net can be collected and released through the collecting and releasing device, the surrounding range of the feeding net can be controlled, work of workers is facilitated through rapid collection of the feeding net, feed can be accurately put in the surrounding range of the feeding net through the feeding device and used by lobsters, and compared with the prior art, the lobster feeding device has the advantages of being convenient to use and simple in structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lobster feeding technical field, concretely relates to a breeding feeding net. BACKGROUND

[0002] Rice field crayfish culture is a kind of shallow water environment using rice field, supplemented by artificial measures, implements rice and shrimp symbiosis, continuous cropping mode, in the process of culture, lobster feeding net needs to be used.

[0003] Lobster feeding net is a kind of feeding equipment specially used for lobster culture, mainly used to provide food for lobster and protect its growth environment.But in the process of using prior art, the present inventor has found the following use problems:

[0004] Prior art discloses a kind of rice field crayfish culture is used feeding net (202220244540.4), including bottom plate, the left part and the right part of one end of the bottom plate are provided with a group of fixed components, two groups The fixed components are symmetrically distributed left and right, two support columns are arranged in the left part of the other end of the bottom plate, the right part of the other end of the bottom plate is provided with sliding assembly, the support column and sliding assembly are commonly provided with baffle between two The baffle is provided with two and two and is symmetrically distributed front and back, the support column and sliding assembly upper end are commonly provided with moving assembly.

[0005] Prior art sliding block and moving handle are used to facilitate feeding, in the process of feeding, staff needs to manually feed, and staff's time is occupied, and manually feeding in the process of sowing, it is very likely that feed is fed out of the range of feeding net, leading to feed waste, and traditional feeding net needs staff to manually operate when tightening and opening, it is more troublesome, therefore, prior art has certain use drawbacks.

[0006] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0007] To solve the above technical problems, the basic concept of the technical solution of the utility model is:

[0008] A kind of feeding net for culture, the:

[0009] Including feed tank, a feeding net is arranged at the front side position of feed tank, a first perforation is opened in the back side wall surface of feed tank;

[0010] Including take-up device, take-up device includes two groups of rotating rods on front and back sides, two groups of rotating rods are square arrangement, the both ends of multiple rotating rods are all fixedly installed with a belt wheel, a belt is movably installed between the corresponding belt wheels of front and back sides, take-up device further includes guide plate, a second perforation is opened on the front side wall surface of guide plate;

[0011] The utility model provides a feeding device, the feeding device includes a first rotating cylinder, the first rotating cylinder is provided with a second rotating cylinder, the rear side of second rotating cylinder is provided with a second motor, the output end of second motor is fixedly installed with a connecting plate, the rear side of second motor is provided with a first motor, the output end of first motor is fixedly installed with a moving cylinder, the side wall of moving cylinder is fixedly installed with a threaded ring, the side wall of first rotating cylinder and second rotating cylinder all are opened with a plurality of third perforations in equal interval, and first rotating cylinder and second rotating cylinder all pass through second perforation.

[0012] As a preferred embodiment of the utility model, the cavity and the front side wall of the feed box are in a hollow state, a group of rotating rods on the front side are located in the hollow cavity of the feed box, and the guide plates are located between the rotating rods on the front side.

[0013] As a preferred embodiment of the utility model, one end of the rotating rod on the rear side is provided with a motor, and the other end of the rotating rod is fixedly installed with a pulley, and the output end of the motor is fixedly connected with the corresponding pulley.

[0014] As a preferred embodiment of the utility model, the plurality of motors are fixedly connected with the inner side wall of the cavity of the feed box, the plurality of corresponding pulleys on the front side are rotatably connected with the inner side wall of the cavity of the feed box, and the rear side wall of the feeding net is fixedly connected with the side wall of the plurality of rotating rods on the rear side.

[0015] As a preferred embodiment of the utility model, a driving cylinder is arranged in the cavity of the feed box, two limiting plates are fixedly installed on the rear side wall of the driving cylinder, one end of the two limiting plates away from the driving cylinder is fixedly connected with the side wall of the feed box, two threaded plates are arranged on the inner side wall of the cavity of the driving cylinder, a limiting rod is fixedly installed on the rear side wall of the first motor, and the two ends of the limiting rod are movably installed in the cavity of the two threaded plates.

[0016] As a preferred embodiment of the utility model, the front side wall of the moving cylinder is in a hollow state, the second motor is fixedly installed in the cavity of the moving cylinder, a threaded plate is fixedly installed on the front side wall of the connecting plate, the threaded plate is screw-connected with the inner side wall of the cavity of the second rotating cylinder, the threaded ring is screw-connected with the inner side wall of the cavity of the driving cylinder, and the guide plate is fixedly connected with the front side wall of the driving cylinder.

[0017] In a preferred embodiment of this utility model, a fixing ring is fixedly installed on the rear side wall of the first rotating cylinder, and multiple fixing blocks are fixedly installed in a ring array on the rear side wall of the second rotating cylinder. The front side wall of each fixing block is hollowed out, and a telescopic block is movably installed inside its cavity. A spring is fixedly installed between the rear side wall of the telescopic block and the cavity of the fixing block, and the end of the telescopic block away from the fixing block is fixedly connected to the fixing ring.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. In summary, by setting up a release and feeding device, the feeding net can be released and retrieved using the release device, and the encirclement range of the feeding net can be controlled. Its rapid retrieval facilitates the work of the staff, and the feeding device can accurately deliver feed within the encirclement range of the feeding net for the crayfish to use. Compared with existing technologies, it has the characteristics of being easy to use and having a simple structure.

[0020] 2. In summary, by setting up a feed box, guide plate, rotating rod, motor, belt, pulley, feeding net and second perforation, the rotation of multiple motors can drive multiple rotating rods to rotate, thereby quickly raising and lowering the feeding net. It is convenient to use and has a simple structure.

[0021] 3. In summary, by setting up a feed box, a first rotating cylinder, a second rotating cylinder, a first perforation, a drive cylinder, a limiting plate, a third perforation, a fixing block, a moving cylinder, a first motor, a first motor, a limiting rod, a threaded ring, a fixing ring, a connecting plate, a threaded plate, a second motor, and a telescopic block, the rotation of the first motor output end can drive the first and second rotating cylinders to move, and the rotation of the second motor output end can drive the first and second rotating cylinders to rotate, thereby dispensing feed within the enclosure of the feeding net. It is convenient to use and has a simple structure.

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0023] In the attached diagram:

[0024] Figure 1 This is a perspective view of one side of the present invention;

[0025] Figure 2 This is a perspective view of the rear side of the feed box 10 of this utility model;

[0026] Figure 3 This is a perspective view of the receiving and feeding device of this utility model;

[0027] Figure 4 This is a perspective view of the launching and retracting device of this utility model;

[0028] Figure 5 Figure 1 is a side view of the feeding device of the present application;

[0029] Figure 6 Figure 2 is another side view of the feeding device of the present application;

[0030] Figure 7 Figure 3 is a side view of the feeding device of the present application;

[0031] Figure 8 Figure 4 is another side view of the feeding device of the present application;

[0032] Figure 9 Figure 5 is a 16-part view of the feeding device of the present application;

[0033] Figure 10 Figure 6 is a perspective view of the fixed block 23, the telescopic block 32 and the spring 34 of the feeding device of the present application.

[0034] In the figure: 10, feed tank; 11, guide plate; 12, rotating rod; 13, first rotating cylinder; 14, second rotating cylinder; 15, first perforation; 16, driving cylinder; 17, limiting plate; 18, motor; 19, belt; 20, pulley; 21, second perforation; 22, third perforation; 23, fixed block; 24, moving cylinder; 25, first motor; 26, limiting rod; 27, threaded ring; 28, fixed ring; 29, connecting plate; 30, threaded plate; 31, second motor; 32, telescopic block; 33, feeding net; 34, spring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be clearly and completely described below in combination with the drawings of the embodiments of the present application, and the following embodiments are used to illustrate the present application.

[0036] As shown in Figure 1 Fig. 1, a feeding net for breeding, comprising a feed tank 10, a feeding net 33 is arranged at the front side of the feed tank 10, and a first perforation 15 is formed in the rear wall surface of the feed tank 10.

[0037] The feeding net further comprises a retracting device, the retracting device comprises two groups of rotating rods 12 arranged on the front and rear sides, the two groups of rotating rods 12 are arranged in a square shape, a pulley 20 is fixedly installed at the two ends of each rotating rod 12, a belt 19 is movably installed between the corresponding pulleys 20 on the front and rear sides, and the retracting device further comprises a guide plate 11, a second perforation 21 is formed in the front wall surface of the guide plate 11.

[0038] The feeding net further comprises a retracting device, the retracting device comprises two groups of rotating rods 12 arranged on the front and rear sides, the two groups of rotating rods 12 are arranged in a square shape, a pulley 20 is fixedly installed at the two ends of each rotating rod 12, a belt 19 is movably installed between the corresponding pulleys 20 on the front and rear sides, and the retracting device further comprises a guide plate 11, a second perforation 21 is formed in the front wall surface of the guide plate 11.

[0039] The feeding device comprises a first rotating cylinder 13, the first rotating cylinder 13 is provided with a second rotating cylinder 14, the rear side of the second rotating cylinder 14 is provided with a second motor 31, the output end of the second motor 31 is fixedly installed with a connecting plate 29, the rear side of the second motor 31 is provided with a first motor 25, the output end of the first motor 25 is fixedly installed with a moving cylinder 24, a threaded ring 27 is fixedly installed on the side wall of the moving cylinder 24, a plurality of third through holes 22 are formed on the side walls of the first rotating cylinder 13 and the second rotating cylinder 14 at equal intervals, and the first rotating cylinder 13 and the second rotating cylinder 14 penetrate the second through holes 21.

[0040] In specific use, the feeding device can drive the rear end of the feeding net 33 to move through the rotation of the plurality of rotating rods 12, thereby performing the feeding net 33 folding and unfolding operation, and the feeding device can discharge the feed for the lobsters through the high-speed rotation of the first rotating cylinder 13 and the second rotating cylinder 14.

[0041] In summary, by arranging the folding and unfolding device and the feeding device, the feeding net 33 can be folded and unfolded through the folding and unfolding device to control the surrounding range of the feeding net 33, the rapid folding facilitates the work of the staff, and the feed can be accurately placed in the surrounding range of the feeding net 33 through the feeding device for the lobsters to use, compared with the prior art, the device has the characteristics of convenient use and simple structure.

[0042] As shown in Figure 2 , Figure 3 and Figure 4 , the cavity and the front side wall surface of the feed box 10 are in a hollow state, a group of rotating rods 12 on the front side are located in the hollow part of the front side of the cavity of the feed box 10, and the guide plates 11 are located between the rotating rods 12 on the front side.

[0043] One end of each of the rotating rods 12 on the rear side is provided with a motor 18, and both ends of the rotating rod 12 are fixedly installed with a belt wheel 20, and the output end of the motor 18 is fixedly connected with the corresponding belt wheel 20.

[0044] The plurality of motors 18 are fixedly connected with the inner side wall of the cavity of the feed box 10, the plurality of corresponding belt wheels 20 on the front side are rotatably connected with the inner side wall of the cavity of the feed box 10, and the rear side wall surface of the feeding net 33 is fixedly connected with the side walls of the plurality of rotating rods 12 on the rear side. The motor 18 is electrically connected with the power supply and the switch.

[0045] In specific use, when the output ends of the plurality of motors 18 rotate, the corresponding pulleys 20 are driven to rotate, the rotation of the plurality of corresponding pulleys 20 drives the rear rotating rods 12 to rotate, the rotation of the rear rotating rods 12 drives the front rotating rods 12 to rotate through the belts 19, and the rotation of the rear rotating rods 12 winds up the feeding net 33, and the rotation of the front rotating rods 12 cooperates with the guide plates 11 to guide, thereby completing the winding and unwinding operation, and the feed bin 10 limits the motors 18 and the pulleys 20.

[0046] In summary, the feed bin 10, the guide plates 11, the rotating rods 12, the motors 18, the belts 19, the pulleys 20, the feeding net 33 and the second perforations 21 are arranged, the plurality of motors 18 are driven to rotate to drive the plurality of rotating rods 12 to rotate, and the feeding net 33 is quickly wound and unwound, which is convenient and simple in structure.

[0047] As Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and the feed bin 10, a driving cylinder 16 is arranged in the cavity of the feed bin 10, two limiting plates 17 are fixedly installed on the rear side wall of the driving cylinder 16, the ends of the two limiting plates 17 away from the driving cylinder 16 are fixedly connected with the side wall of the feed bin 10, two threaded plates 30 are arranged on the inner side wall of the cavity of the driving cylinder 16, a limiting rod 26 is fixedly installed on the rear side wall of the first motor 25, and the two ends of the limiting rod 26 are movably installed in the cavities of the two threaded plates 30.

[0048] The front side wall surface of the moving cylinder 24 is in a hollow state, the second motor 31 is fixedly installed in the cavity of the moving cylinder 24, a threaded plate 30 is fixedly installed on the front side wall surface of the connecting plate 29, the threaded plate 30 is in threaded connection with the inner side wall of the cavity of the second rotating cylinder 14, the threaded ring 27 is in threaded connection with the inner side wall of the cavity of the driving cylinder 16, and the guide plate 11 is in fixed connection with the front side wall surface of the driving cylinder 16.

[0049] The rear side wall of the first rotating cylinder 13 is fixedly installed with a fixed ring 28, and the rear side wall of the second rotating cylinder 14 is fixedly installed with a plurality of fixed blocks 23 in an annular array, the front side wall surface of each fixed block 23 is in a hollow state, a telescopic block 32 is movably installed in the cavity of each fixed block 23, a spring 34 is fixedly installed between the rear side wall surface of the telescopic block 32 and the cavity of the fixed block 23, and the end of the telescopic block 32 away from the fixed block 23 is in fixed connection with the fixed ring 28.

[0050] In specific use, when the output end of the first motor 25 rotates, the moving cylinder 24 is driven to rotate, and the rotation of the moving cylinder 24 drives the threaded ring 27 to rotate. The threaded ring 27 is threadedly connected with the cavity of the driving cylinder 16, and moves during the rotation, thereby driving the first motor 25 to move. The limiting rod 26 can limit the first motor 25 through the threaded plate 30. The movement of the threaded ring 27 drives the moving cylinder 24 to move, and the movement of the moving cylinder 24 drives the second motor 31 to move. The movement of the second motor 31 drives the connecting plate 29 and the threaded plate 30 to move, and the movement of the threaded plate 30 drives the second rotating cylinder 14 to move forward and backward. During the movement of the second rotating cylinder 14, the fixed block 23 is driven to move, and the movement of the fixed block 23 drives the telescopic block 32 to move through the spring 34. During the movement of the telescopic block 32, the telescopic block 32 abuts against the fixed ring 28 and drives the fixed ring 28 to move. The movement of the fixed ring 28 drives the first rotating cylinder 13 to move, so that the first rotating cylinder 13 and the second rotating cylinder 14 are inserted into the cavity of the feeding net 33. During the movement of the fixed ring 28, the fixed ring 28 abuts against the front side wall surface of the guide plate 11, and then stops moving, so that the second rotating cylinder 14 moves alone. The movement of the second rotating cylinder 14 drives the third perforation 22 on the side wall of the second rotating cylinder 14 to correspond to the third perforation 22 on the side wall of the first rotating cylinder 13. The rotation of the output end of the second motor 31 drives the connecting plate 29 to rotate, and the rotation of the connecting plate 29 drives the threaded plate 30 to rotate. The rotation of the threaded plate 30 drives the second rotating cylinder 14 to rotate, and the rotation of the second rotating cylinder 14 drives the fixed block 23 and the telescopic block 32 to rotate. The rotation of the telescopic block 32 drives the fixed ring 28 to rotate, and the rotation of the fixed ring 28 drives the first rotating cylinder 13 to rotate, so that the first rotating cylinder 13 and the second rotating cylinder 14 rotate synchronously. During the rotation, the feed in the cavity of the second rotating cylinder 14 is discharged by centrifugal force. When the above structure moves to the rear side and approaches the first perforation 15, the worker can rotate the connecting plate 29, remove the threaded plate 30 through the threaded connection with the second rotating cylinder 14, and make the rear side of the second rotating cylinder 14 hollow, so as to inject the feed.

[0051] Therefore, the first rotating cylinder 13 and the second rotating cylinder 14 are driven to move by the rotation of the output end of the first motor 25, and the first rotating cylinder 13 and the second rotating cylinder 14 are driven to rotate by the rotation of the output end of the second motor 31, so that the feed is placed in the surrounding range of the feeding net 33, and the convenient use and simple structure are realized.

[0052] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the application belong to the scope protected by the utility model.

Claims

1. A feeding net for aquaculture, characterized by, The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); 2. The feeding net for farming according to claim 1, characterized in that, The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); 3. The feeding net according to claim 2, wherein The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); 4. The feeding net according to claim 3, wherein The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); 5. The feeding net according to claim 1, wherein The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15); The utility model relates to a kind of automatic feeding device, including feed box (10), feed box (10) is provided with a feeding net (33) at the front side position, and the rear side wall surface of feed box (10) is opened with a first perforation (15) 6. The feeding net according to claim 5, wherein The front side wall surface of the mobile cylinder (24) is in a hollow state, the second motor (31) is fixedly installed in the cavity of the mobile cylinder (24), a threaded plate (30) is fixedly installed on the front side wall surface of the connecting plate (29), the threaded plate (30) is in threaded connection with the inner side wall of the cavity of the second rotating cylinder (14), the threaded ring (27) is in threaded connection with the inner side wall of the cavity of the driving cylinder (16), and the guide plate (11) is fixedly connected with the front side wall surface of the driving cylinder (16).

7. The feeding net according to claim 6, wherein A fixed ring (28) is fixedly installed on the rear side wall of the first rotating cylinder (13), a plurality of fixed blocks (23) are fixedly installed in an annular array on the rear side wall of the second rotating cylinder (14), the front side wall surfaces of the fixed blocks (23) are all in a hollow state, a telescopic block (32) is movably installed in the cavity of each fixed block (23), a spring (34) is fixedly installed between the rear side wall surface of the telescopic block (32) and the cavity of the fixed block (23), and one end, away from the fixed block (23), of the telescopic block (32) is fixedly connected with the fixed ring (28).

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