A negative pressure blood sampling device for cattle tail vein and a blood sampling method thereof
By designing multiple clamping devices to fix the blood collector on the back and tail of the cow, and using negative pressure blood collection and automatic hemostasis functions, the problems of unstable and cumbersome bleeding process of existing blood collection equipment are solved, and blood collection efficiency and stability are improved.
Patent Information
- Application Number
- CN202510079744.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-18
- Publication Date
- 2025-04-04
AI Technical Summary
The existing oxtail vein blood collection equipment is unstable during fixation and blood collection, resulting in poor blood collection effect. After blood collection, manual compression is required to stop bleeding, which increases the labor intensity of the staff.
A oxtail vein negative pressure blood collector was designed, and multiple clamping equipment were used to fix the cattle back and oxtail. Blood collection was achieved through negative pressure blood collection needles, and disinfection cotton balls were used to automatically stop bleeding, reducing manual operation.
Through the design of multiple clamping equipment, the stability of the blood collector is improved, ensuring the stability and effect of the blood collection process; the automatic hemostasis function reduces the labor intensity of staff and improves the blood collection efficiency.
Smart Images
Figure CN119745384A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of blood collectors, in particular to a bovine tail vein negative pressure blood collector and a blood collection method thereof. Background Art
[0002] Cattle usually refer to multiple species under the subfamily Bovinae, including domestic cattle, yellow cattle, buffalo and yaks. These animals are herbivorous mammals with ruminant digestive systems that can effectively utilize plant-based foods. Cattle tail vein blood sampling is a method for collecting blood samples from cattle. Compared with traditional jugular vein blood sampling, it has the advantages of simple operation and less stress response.
[0003] When collecting blood from the cow's tail, the cow's tail can be fixed by a fixing device, and then blood can be collected through a blood collection device. However, some fixing devices only fix the cow's tail. The cow will become irritable after being fixed for a long time. A single fixing method cannot effectively fix the blood collection device on the cow. At the same time, after blood collection, the blood collection device needs to be removed from the cow, and the needle hole needs to be pressed with a clean cotton to stop bleeding. Long-term pressing also increases the labor intensity of the staff. Therefore, it is necessary to propose a cow's tail vein negative pressure blood collector. Summary of the invention
[0004] In view of the problems in the prior art, the present invention provides a bovine tail vein negative pressure blood collector and a blood collection method thereof.
[0005] The technical solution adopted by the present invention to solve its technical problem is: a bovine caudal vein negative pressure blood collector, comprising a placing block, a first arc-shaped clamping block and a blood sampling mechanism, the lower surface of the placing block is provided with a sliding groove, the inner wall of the sliding groove is slidably connected with a sliding block, the outer wall of one end of the sliding block is fixedly connected with the first arc-shaped clamping block, the end of the sliding block away from the first arc-shaped clamping block is fixedly connected with the second arc-shaped clamping block, the inner top wall of the sliding groove is rotatably connected with a rotating rod, the outer wall of the rotating rod is fixedly connected with a top block, the outer wall of the sliding block relative to the position of the top block is provided with a circular hole, the circular hole matches the top block, the end of the placing block away from the second arc-shaped clamping block is fixedly connected with a mounting block, the lower surface of the mounting block is provided with a T-shaped groove, and the inner wall of the T-shaped groove is slidably connected with the T-shaped block.
[0006] Specifically, the blood sampling mechanism includes a mounting clamp block, which is arranged in an arc shape, one end of the T-shaped block extends outside the T-shaped slot and is fixedly connected with a round-shaped block, the inner wall of the round-shaped block is rotatably connected with a round-shaped fixing block, the inner wall of the round-shaped fixing block is slidably connected with a square block, the outer wall of the square block is symmetrically fixedly connected with a mounting frame, a mounting clamp block is provided inside the mounting frame, the inner walls of both ends of the round-shaped fixing block are fixedly connected with a first conical block, the outer wall of the mounting frame is provided with a sliding hole and is slidably connected with a second conical block, the second conical block abuts against the first conical block, the outer wall of the mounting clamp block is fixedly connected with a connecting block, the connecting block extends into the second conical block through a connecting groove, the inner wall of the connecting groove is fixedly connected with a second spring, and the other end of the second spring is fixedly connected to the connecting block.
[0007] Specifically, the interior of the circular block is symmetrically penetrated by a limiting cavity, the inner wall of the limiting cavity is slidably connected to the limiting block, the outer wall of the circular fixed block is penetrated by a limiting hole, the limiting block extends into the limiting hole, the inner wall of the limiting cavity is fixedly connected to a third spring, and the other end of the third spring is fixedly connected to the limiting block.
[0008] Specifically, the inner wall of the slide groove is fixedly connected with a first spring, and the other end of the first spring is fixedly connected to the sliding block.
[0009] Specifically, the mounting clamps on one side jointly clamp a negative pressure blood collection needle, and the mounting clamps on the side away from the negative pressure blood collection needle jointly clamp a sterilized cotton ball.
[0010] Specifically, inner walls of the first arc-shaped clamping block and the second arc-shaped clamping block are both fixedly connected with rubber protection blocks.
[0011] Specifically, protrusions are provided at both upper and lower ends of the square block, and one end of the rotating rod extends outside the placement block and is fixedly connected to a handle.
[0012] A method for using a bovine tail vein negative pressure blood collector comprises the following steps: The first step: when in use, place the device on the back of the cow that needs blood collection, place the first arc-shaped clamping block on the outside of the cow's back, and place the second arc-shaped clamping block on the outside of the cow's tail. Use the handle to drive the rotating rod and the top block to rotate, so that the top block is rotated out of the circular hole opened by the slider. The first spring pushes the slider to move inward, and the slider drives the first arc-shaped clamping block and the second arc-shaped clamping block to move toward the direction of the cow. The first arc-shaped clamping block is against the cow's back, and the second arc-shaped clamping block clamps the cow's tail.
[0013] The second step is, when in use, insert the negative pressure blood collection needle and the disinfected cotton ball to be used into the mounting frame, the second spring pushes the connecting block and the mounting clamp block to move inward, the negative pressure blood collection needle and the disinfected cotton ball are clamped and fixed by the mounting clamp block, the circular block is pushed to move toward the cow's tail, the circular block drives the T-shaped block to move under the mounting block, the negative pressure blood collection needle is moved to one side of the cow's tail, the mounting frame and the negative pressure blood collection needle are pushed toward the cow's tail by the square block, the square block drives the connecting block and the second conical block to move, the first conical block pushes the second conical block to move inward, the second conical block compresses the second spring, increases the squeezing force of the mounting clamp block, until the negative pressure blood collection needle is inserted into the cow's tail vein, the negative pressure blood collection needle performs negative pressure blood collection on the cow's tail vein, and after blood collection, moves outward shaped block, pull the negative pressure blood collection needle out of the ox's tail, rotate the circular fixing block clockwise, the circular fixing block rotates the disinfected cotton ball to one side of the ox's tail, and rotates the negative pressure blood collection needle to the side away from the ox's tail. After rotation, the third spring pushes the limit block to move into the limit hole, and limits and fixes the circular fixing block. Since the negative pressure blood collection needle contains heavy bovine venous blood, the negative pressure blood collection needle pushes the square block and the disinfected cotton ball to move toward the needle hole of the ox's tail, and the needle hole is disinfected by the disinfected cotton ball. When the square block moves, the second conical blocks on both sides of the negative pressure blood collection needle are separated from the first conical block, reducing the clamping force of the mounting clamp, so that the negative pressure blood collection needle can be removed from the mounting frame. After disinfection, move the square block to the middle position of the circular fixing block, and remove the disinfected cotton ball from the mounting frame.
[0014] The third step is to move the circular block outward to separate it from the cow's tail during use. The handle can be used to drive the rotating rod and the top block to rotate. The top block can be used to push the slider to move outward. The slider drives the first arc-shaped clamping block and the second arc-shaped clamping block to move, so that the first arc-shaped clamping block is separated from the cow's back, and the second arc-shaped clamping block is separated from the cow's tail. Then, the device can be removed from the cow's back.
[0015] Beneficial effects of the present invention: (1) The present invention discloses a negative pressure blood collection device for the tail vein of a bovine and a method for collecting blood therefrom. The first arc-shaped clamp block and the second arc-shaped clamp block are respectively placed on both sides of the back and the tail of the bovine. The first spring pushes the first arc-shaped clamp block and the second arc-shaped clamp block to clamp and fix the back and the tail of the bovine respectively. The device is fixed on the back of the bovine. The square block is pushed to insert the negative pressure blood collection needle into the tail of the bovine for blood collection. When the negative pressure blood collection needle moves toward the tail of the bovine, the first conical block pushes the second conical block to move toward the direction of the negative pressure blood collection needle. The second conical block and the connecting block compress the second spring to increase the clamping force of the mounting clamp block on the negative pressure blood collection needle. The stability of the device is increased by using multiple clamping devices. At the same time, when the negative pressure blood collection needle is used for blood collection, the clamping force is increased to prevent the negative pressure blood collection needle from separating from the device when the bovine shakes, thereby affecting the blood collection effect.
[0016] (2) The negative pressure blood collection device and blood collection method of the present invention are as follows: after using the negative pressure blood collection needle to collect blood, the square block is pulled away from the cow's tail, the negative pressure blood collection needle is pulled out of the cow's tail, the circular fixed block is rotated, and the sterilized cotton ball is rotated to one side of the cow's tail. The negative pressure blood collection needle pushes the square block and the sterilized cotton ball to move toward the cow's tail, so that the sterilized cotton ball and the needle hole of the cow's tail are pressed against each other to stop bleeding. There is no need for the staff to manually press the sterilized cotton ball against the needle hole of the cow's tail, thereby reducing the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0018] Figure 1 A schematic diagram of the front view of a negative pressure blood collector for bovine caudal vein provided by the present invention; Figure 2 A schematic diagram of the structure of a placement block of a bovine caudal vein negative pressure blood collector provided by the present invention when viewed from above; Figure 3 A schematic cross-sectional structure diagram of a placement block of a bovine caudal vein negative pressure blood collector provided by the present invention; Figure 4 A schematic diagram of a cross-sectional structure of a slider movement of a bovine caudal vein negative pressure blood collector provided by the present invention; Figure 5 A schematic cross-sectional view of the mounting block of a bovine caudal vein negative pressure blood collector provided by the present invention; Figure 6 A schematic diagram of the front view of the circular block structure of a bovine tail vein negative pressure blood collector provided by the present invention; Figure 7 A schematic cross-sectional structure diagram of a circular block of a bovine caudal vein negative pressure blood collector provided by the present invention; Figure 8 A schematic front view structure diagram of a circular fixing block of a bovine caudal vein negative pressure blood collector provided by the present invention.
[0019] In the figure: 1. placement block; 2. first arc-shaped clamping block; 3. blood sampling mechanism; 31. installation clamping block; 32. circular block; 33. circular fixing block; 34. square block; 35. mounting frame; 36. first conical block; 37. second conical block; 38. connecting block; 39. second spring; 4. sliding block; 5. second arc-shaped clamping block; 6. rotating rod; 7. top block; 8. mounting block; 9. T-shaped block; 10. limiting block; 11. limiting hole; 12. first spring; 13. negative pressure blood collection needle; 14. disinfection cotton ball; 15. rubber protection block; 16. handle; 17. third spring. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0021] like Figure 1-Figure 8 As shown, a bovine caudal vein negative pressure blood collector described in the present invention comprises a placement block 1, a first arc-shaped clamping block 2 and a blood sampling mechanism 3. A slide groove is provided on the lower surface of the placement block 1, and a slider 4 is slidably connected to the inner wall of the slide groove. The outer wall of one end of the slider 4 is fixedly connected to the first arc-shaped clamping block 2, and the end of the slider 4 away from the first arc-shaped clamping block 2 is fixedly connected to the second arc-shaped clamping block 5. The inner top wall of the slide groove is rotatably connected to a rotating rod 6, and the outer wall of the rotating rod 6 is fixedly connected to a top block 7. A circular hole is provided on the outer wall of the slider 4 relative to the top block 7, and the circular hole matches the top block 7. The end of the placement block 1 away from the second arc-shaped clamping block 5 is fixedly connected to a mounting block 8, and a T-shaped groove is provided on the lower surface of the mounting block 8, and a T-shaped block 9 is slidably connected to the inner wall of the T-shaped groove.
[0022] Among them, the blood sampling mechanism 3 includes a mounting clamp 31, which is arranged in an arc shape. One end of the T-shaped block 9 extends outside the T-shaped groove and is fixedly connected with a round block 32. The inner wall of the round block 32 is rotatably connected with a round fixing block 33. The inner wall of the round fixing block 33 is slidably connected with a square block 34. The outer wall of the square block 34 is symmetrically fixedly connected with a mounting frame 35. The mounting frame 35 is provided with a mounting clamp 31 inside. The inner walls of both ends of the round fixing block 33 are fixedly connected with a first conical block 36. The outer wall of the mounting frame 35 is provided with a sliding hole and is slidably connected with a second conical block 37. The second conical block 37 is abutted against the first conical block 36. The outer wall of the mounting clamp 31 is fixedly connected with a connecting block 38. The connecting block 38 extends through the connecting groove into the second conical block 37. The inner wall of the connecting groove is fixedly connected with a second spring 39. The other end of the second spring 39 is fixedly connected to the connecting block 38.
[0023] Among them, the interior of the circular block 32 is symmetrically penetrated with a limiting cavity, the inner wall of the limiting cavity is slidably connected to the limiting block 10, the outer wall of the circular fixed block 33 is penetrated with a limiting hole 11, the limiting block 10 extends into the limiting hole 11, the inner wall of the limiting cavity is fixedly connected with a third spring 17, and the other end of the third spring 17 is fixedly connected to the limiting block 10.
[0024] The inner wall of the slide groove is fixedly connected with a first spring 12 , and the other end of the first spring 12 is fixedly connected with the slider 4 .
[0025] The mounting clamp 31 on one side clamps the negative pressure blood collection needle 13 , and the mounting clamp 31 on the side away from the negative pressure blood collection needle 13 clamps the sterilizing cotton ball 14 .
[0026] The inner walls of the first arc-shaped clamping block 2 and the second arc-shaped clamping block 5 are both fixedly connected with a rubber protection block 15 .
[0027] Among them, both upper and lower ends of the square block 34 are provided with protrusions, and one end of the rotating rod 6 extends to the outside of the placement block 1 and is fixedly connected to the handle 16.
[0028] A method for using a bovine tail vein negative pressure blood collector comprises the following steps: The first step: when in use, place the device on the back of the cow that needs blood collection, place the first arc-shaped clamping block 2 on the outside of the cow's back, and place the second arc-shaped clamping block 5 on the outside of the cow's tail. The handle 16 drives the rotating rod 6 and the top block 7 to rotate, so that the top block 7 is rotated out of the circular hole opened by the slider 4. The first spring 12 pushes the slider 4 to move inward, and the slider 4 drives the first arc-shaped clamping block 2 and the second arc-shaped clamping block 5 to move toward the direction of the cow. The first arc-shaped clamping block 2 is against the cow's back, and the second arc-shaped clamping block 5 clamps and fixes the cow's tail.
[0029] The second step is that when in use, the negative pressure blood collection needle 13 and the disinfected cotton ball 14 to be used are inserted into the mounting frame 35, and the second spring 39 pushes the connecting block 38 and the mounting clamping block 31 to move inward, and the negative pressure blood collection needle 13 and the disinfected cotton ball 14 are clamped and fixed by the mounting clamping block 31, and the circular block 32 is pushed to move toward the cow's tail, and the circular block 32 drives the T-shaped block 9 to move under the mounting block 8, and the negative pressure blood collection needle 13 is moved to one side of the cow's tail, and the mounting frame 35 and the negative pressure blood collection needle 13 are pushed toward the cow's tail by the square block 34. The square block 34 drives the connecting block 38 and the second conical block 37 to move, and the first conical block 36 pushes the second conical block 37 to move inward, and the second conical block 37 compresses the second spring 39 to increase the squeezing force of the mounting clamping block 31 until the negative pressure blood collection needle 13 is inserted into the cow's tail vein, and the negative pressure blood collection needle 13 performs negative pressure blood collection on the cow's tail vein. After blood collection, the negative pressure blood collection needle 13 moves outward. The negative pressure blood collection needle 13 is pulled out from the cow's tail, and the circular fixed block 33 is rotated clockwise. The circular fixed block 33 rotates the disinfected cotton ball 14 to the side of the cow's tail, and the negative pressure blood collection needle 13 is rotated to the side away from the cow's tail. After the rotation, the third spring 17 pushes the limit block 10 to move into the limit hole 11, and the circular fixed block 33 is limited and fixed. Since the negative pressure blood collection needle 13 contains the cow's venous blood, which is heavy, the negative pressure blood collection needle 13 pushes the square block 34 and the disinfection cotton ball 14 move toward the oxtail needle hole, and the needle hole is disinfected by the disinfection cotton ball 14. When the square block 34 moves, the second conical blocks 37 and the first conical blocks 36 located on both sides of the negative pressure blood collection needle 13 are separated, reducing the clamping force of the mounting clamp block 31, and the negative pressure blood collection needle 13 can be moved out of the mounting frame 35. After disinfection, the square block 34 is moved to the middle position of the circular fixed block 33, and the disinfection cotton ball 14 is moved out of the mounting frame 35.
[0030] The third step is to move the circular block 32 outward to separate it from the cow's tail during use, and then drive the rotating rod 6 and the top block 7 to rotate through the handle 16, and push the slider 4 outward through the top block 7, and the slider 4 drives the first arc-shaped clamping block 2 and the second arc-shaped clamping block 5 to move, so that the first arc-shaped clamping block 2 is separated from the cow's back, and the second arc-shaped clamping block 5 is separated from the cow's tail, and then the device can be removed from the cow's back.
[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.
Claims
1. A negative pressure blood collector for the tail vein of a bovine, comprising a placement block (1), a first arc-shaped clamping block (2) and a blood collection mechanism (3), characterized in that: A slide groove is provided on the lower surface of the placement block (1), and a slider (4) is slidably connected to the inner wall of the slide groove. The outer wall of one end of the slider (4) is fixedly connected to the first arc-shaped clamping block (2), and the end of the slider (4) away from the first arc-shaped clamping block (2) is fixedly connected to the second arc-shaped clamping block (5). The inner top wall of the slide groove is rotatably connected to a rotating rod (6), and the outer wall of the rotating rod (6) is fixedly connected to a top block (7). A circular hole is provided on the outer wall of the slider (4) at a position relative to the top block (7), and the circular hole matches the top block (7). The end of the placement block (1) away from the second arc-shaped clamping block (5) is fixedly connected to a mounting block (8), and a T-shaped groove is provided on the lower surface of the mounting block (8), and the inner wall of the T-shaped groove is slidably connected to a T-shaped block (9).
2. A bovine tail vein negative pressure blood collector according to claim 1, characterized in that: The blood sampling mechanism (3) comprises a mounting clamp (31), wherein the mounting clamp (31) is arranged in an arc shape, one end of the T-shaped block (9) extends outside the T-shaped groove and is fixedly connected to a circular block (32), the inner wall of the circular block (32) is rotatably connected to a circular fixed block (33), the inner wall of the circular fixed block (33) is slidably connected to a square block (34), the outer wall of the square block (34) is symmetrically fixedly connected to a mounting frame (35), the interior of the mounting frame (35) is provided with a mounting clamp (31), the circular fixed block ( The inner walls of both ends of the mounting bracket (33) are fixedly connected to first conical blocks (36), the outer wall of the mounting bracket (35) is provided with a sliding hole and is slidably connected to a second conical block (37), the second conical block (37) abuts against the first conical block (36), the outer wall of the mounting clamp block (31) is fixedly connected to a connecting block (38), the connecting block (38) extends into the second conical block (37) through a connecting groove, the inner wall of the connecting groove is fixedly connected to a second spring (39), the other end of the second spring (39) is fixedly connected to the connecting block (38).
3. A bovine tail vein negative pressure blood collector according to claim 1, characterized in that: The inner part of the circular block (32) is symmetrically penetrated by a limiting cavity, the inner wall of the limiting cavity is slidably connected to the limiting block (10), the outer wall of the circular fixed block (33) is penetrated by a limiting hole (11), the limiting block (10) extends into the limiting hole (11), the inner wall of the limiting cavity is fixedly connected to a third spring (17), and the other end of the third spring (17) is fixedly connected to the limiting block (10).
4. A bovine tail vein negative pressure blood collector according to claim 2, characterized in that: The inner wall of the slide groove is fixedly connected to a first spring (12), and the other end of the first spring (12) is fixedly connected to the slide block (4).
5. The negative pressure blood collector for bovine caudal vein according to claim 1, characterized in that: The mounting clamp (31) on one side jointly clamps the negative pressure blood collection needle (13), and the mounting clamp (31) on the side away from the negative pressure blood collection needle (13) jointly clamps the sterilized cotton ball (14).
6. The negative pressure blood collector for bovine caudal vein according to claim 1, characterized in that: The inner walls of the first arc-shaped clamping block (2) and the second arc-shaped clamping block (5) are both fixedly connected with a rubber protection block (15).
7. The negative pressure blood collector for bovine caudal vein according to claim 1, characterized in that: The upper and lower ends of the square block (34) are both provided with protrusions, and one end of the rotating rod (6) extends outside the placement block (1) and is fixedly connected to a handle (16).
8. A method for using a bovine tail vein negative pressure blood collector according to any one of claims 1 to 7, characterized in that: The following steps are involved: The first step: when in use, the device is placed on the back of a cow that needs blood collection, the first arc-shaped clamping block (2) is placed on the outside of the cow's back, and the second arc-shaped clamping block (5) is placed on the outside of the cow's tail. The handle (16) drives the rotating rod (6) and the top block (7) to rotate, so that the top block (7) is rotated out of the circular hole opened by the slider (4), and the first spring (12) pushes the slider (4) to move inward, and the slider (4) drives the first arc-shaped clamping block (2) and the second arc-shaped clamping block (5) to move toward the direction of the cow, the first arc-shaped clamping block (2) is against the cow's back, and the second arc-shaped clamping block (5) clamps and fixes the cow's tail; In the second step, when in use, the negative pressure blood collection needle (13) and the sterile cotton ball (14) to be used are inserted into the mounting frame (35), and the second spring (39) pushes the connecting block (38) and the mounting clamp (31) to move inward, and the negative pressure blood collection needle (13) and the sterile cotton ball (14) are clamped and fixed by the mounting clamp (31), and the circular block (32) is pushed to move toward the cow's tail. The circular block (32) drives the T-shaped block (9) to move under the mounting block (8), and the negative pressure blood collection needle (13) is moved to one side of the cow's tail. The square block (34) pushes the mounting frame (35) and the negative pressure blood collection needle (13) to move toward the cow's tail. The square block (34) drives the connecting block (38) and the second conical block (37) to move. The first conical block (36) pushes the second conical block (37) to move inward. The second conical block (37) compresses the second spring (39) to increase the squeezing force of the mounting clamp (31) until the negative pressure blood collection needle (13) is inserted into the cow's tail vein. The negative pressure blood collection needle (13) performs negative pressure blood collection on the cow's tail vein. After blood collection, the negative pressure blood collection needle (13) moves outward. The square block (34) is used to pull the negative pressure blood collection needle (13) out of the cow's tail. The circular fixed block (33) is rotated clockwise. The circular fixed block (33) rotates the sterilized cotton ball (14) to the side of the cow's tail, and the negative pressure blood collection needle (13) is rotated to the side away from the cow's tail. After the rotation, the third spring (17) pushes the limit block (10) to move into the limit hole (11), and the circular fixed block (33) is limited and fixed. Since the negative pressure blood collection needle (13) contains the cow's venous blood, which is heavy, the negative pressure blood collection needle (13) pushes the square block (3 4) Move the sterile cotton ball (14) toward the needle hole of the oxtail, and sterilize the needle hole with the sterile cotton ball (14). When the square block (34) moves, the second conical blocks (37) located on both sides of the negative pressure blood collection needle (13) are separated from the first conical block (36), thereby reducing the clamping force of the mounting clamp (31), and the negative pressure blood collection needle (13) can be removed from the mounting frame (35). After sterilization, move the square block (34) to the middle position of the circular fixed block (33), and remove the sterile cotton ball (14) from the mounting frame (35); In the third step, when in use, the circular block (32) is moved outward to separate the circular block (32) from the cow's tail, and the handle (16) is used to drive the rotating rod (6) and the top block (7) to rotate, and the top block (7) is used to push the slider (4) to move outward, and the slider (4) drives the first arc-shaped clamping block (2) and the second arc-shaped clamping block (5) to move, so that the first arc-shaped clamping block (2) is separated from the cow's back, and the second arc-shaped clamping block (5) is separated from the cow's tail, and the device can be removed from the cow's back.