A vacuum blood sampling device

Abstract

The present invention innovatively provides a vacuum blood collector, comprising a guide tube and a drainage tube, wherein the guide tube is communicated with the drainage tube, an insert is provided at one end of the drainage tube, the insert and the guide tube are respectively provided at two ends of the drainage tube, a blood collection bag is sleeved on the guide tube, a knife placement groove is provided at one end of the guide tube close to the insert, the knife placement groove is provided along the radial direction of the guide tube, a blade is inserted in the knife placement groove, a sliding structure is provided on the inner wall of the knife placement groove, a first button is provided at one end of the guide tube away from the drainage tube, a second button is provided on the outer wall of the drainage tube, the first button and the second button are pressed to make the blade slide in the knife placement groove; the insert is used to open the knife edge, the guide tube is inserted into the knife edge, and after the guide tube is used to collect pig blood, the pig blood is discharged through the guide tube, and during the pig blood collection process, the pig blood is prevented from contacting with the air, vacuum blood collection is achieved, and bacterial contamination is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of blood sampling devices, and more particularly to a vacuum blood sampling device. Background Art

[0002] Pig blood contains nutrients such as vitamin B2, vitamin C, and protein, so the hygiene indicators of pig blood are very important; the current blood collection method mainly uses a slaughter knife to pierce the pig's artery, and the pig blood flows out along the knife edge. During the blood flow process, the pig blood comes into contact with the knife, the external air, and the pig's body, and brings impurities into the pig blood and into the collector, causing contamination to the pig blood. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a vacuum blood collector to overcome the above-mentioned defects in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A vacuum blood collector comprises a guide tube and a drainage tube, wherein the guide tube is communicated with the drainage tube, an insert is provided at one end of the drainage tube, the insert and the guide tube are respectively provided at the two ends of the drainage tube, a blood collection bag is sleeved on the guide tube, a knife placement groove is provided at the end of the guide tube close to the insert, the knife placement groove is provided along the radial direction of the guide tube, a blade is inserted in the knife placement groove, a sliding structure is provided on the inner wall of the knife placement groove, a first button is provided at the end of the guide tube away from the drainage tube, a second button is provided on the outer wall of the drainage tube, and the first button and the second button are pressed to make the blade slide in the knife placement groove.

[0006] Preferably, the sliding structure includes two groups of slide rails relatively arranged on both sides of the blade groove, two groups of sliders are arranged on the side of the blade close to the guide tube, and the two groups of sliders are slidably arranged in the slide rails respectively, a transmission turbine is arranged at the bottom of the blade, a worm is arranged in the slide rail along the length direction, the transmission turbine is meshed with the worm, a rack is arranged parallel to one side of the worm, a gear is coaxially arranged on the transmission turbine, the rack is meshed with the gear, a disc spring is also arranged in the slide rail, the disc spring is arranged on the worm, and the worm rotates to make the disc spring store energy or release energy, and a locking piece for fixing the slider is arranged at one end of the slide rail close to the insert, when the slider is located in the locking piece, the disc spring stores energy, and the first button is pressed to make the slider disengage from the locking piece, and the blade is reset under the action of the disc spring.

[0007] Preferably, the insert is provided with a first inclined surface inclined toward the side where the drainage tube is located, the knife placement groove is provided on the first inclined surface, the first button is provided on the first inclined surface, and the first button is provided on the side of the knife placement groove away from the drainage tube, and both ends of the knife placement groove are connected to the drainage tube.

[0008] Preferably, a placement groove is provided on the side of the knife placement groove close to the first button, and the locking piece is provided in the placement groove. The locking piece includes a connecting rod and two groups of locking blocks, the two groups of locking blocks are respectively provided at both ends of the connecting rod, and the sliding block is correspondingly provided with a locking groove, and a reset piece is respectively provided at both ends of the connecting rod. The two groups of locking blocks move toward the side where the locking groove is located under the action of the reset piece, and a third inclined surface is provided on the side of the connecting rod close to the knife placement groove, a notch is provided at the bottom of the first button, and a fourth inclined surface matching the third inclined surface is provided in parallel on the notch, and the first button is pressed to make the connecting rod move into the placement groove.

[0009] Preferably, the second button includes a key and a button slot, the key is slidably arranged on the button slot, a flexible rod is arranged on the key, a push groove is arranged on the inner wall of the knife placing slot, one end of the flexible rod is fixedly connected to the bottom of the blade, and the flexible rod is arranged in the push groove, a sealing ring is arranged between the push groove and the button slot, the flexible rod is slidably arranged in the sealing ring and is sealed with the sealing ring, and the key is slid to make the blade slide in the knife placing slot.

[0010] Preferably, a limit plate is provided on the outside of the drainage tube, the limit plate is provided on the side where the drainage tube is located, and the limit plate is vertically provided on the drainage tube.

[0011] Preferably, a valve body is provided on the drainage tube, and the valve body includes a drainage chamber, and a liquid inlet and a liquid outlet are respectively provided at both ends of the drainage chamber. A baffle is provided in the drainage chamber, and the baffle is connected to the inner wall of the drainage chamber through a torsion spring. When the liquid flow rate at the liquid inlet reaches a limited value, the baffle rotates under the action of the liquid to open the drainage chamber.

[0012] Preferably, a vacuum chamber is provided on one side of the drainage chamber, and the vacuum chamber includes a first valve port and a second valve port, the first valve port and the second valve port are respectively provided on both sides of the baffle, and the first valve port and the second valve port are both communicated with the drainage chamber, a sealing rod is inserted in the second valve port, and a vacuum pump is provided in the vacuum chamber, when the liquid flow rate of the liquid inlet is lower than a limited value, the baffle is reset, the sealing rod is separated from the second valve port and the vacuum pump is started.

[0013] Preferably, a moving cavity is provided on the side wall of the drainage cavity, a moving block and a first elastic member are provided in the moving cavity, the moving block is pressed against the baffle, and a second inclined surface inclined toward the second valve port is provided on a side of the moving block close to the baffle, a connecting cavity is provided between the moving cavity and the second valve port, an insertion rod is inserted in the connecting cavity, a second elastic member is sleeved on the insertion rod, a third elastic member is sleeved on the sealing rod, and a limiting ring is provided at one end of the sealing rod close to the second valve port, the insertion rod is inserted in the limiting ring,

[0014] Preferably, a fixing sleeve is provided on the guide tube, the blood collection bag is arranged between the fixing sleeve and the guide tube, and the fixing sleeve and the guide tube are threadedly connected.

[0015] The beneficial effects of the present invention are as follows: the blade is opened by using the insert, and the guide tube is inserted into the blade. After the pig blood is collected by using the guide tube, the pig blood is discharged through the guide tube. During the pig blood collection process, the pig blood is prevented from contacting with the air, vacuum blood collection is achieved, and bacterial contamination is reduced; a baffle is arranged on the guide tube, and the baffle is used to limit the length of the drainage tube inserted into the pig body, so as to prevent the guide tube from being inserted too deeply and causing damage to the pig's internal organs; at the same time, a blade is also arranged on the insert, and during the blood collection process, after the blade is used to pierce the pig body to form a blade, the insert is inserted into the blade, and the blade and the insert can be replaced without pulling out the blade, thereby reducing pig blood leakage; a vacuum pump is arranged on the guide tube, and when the pig blood flow rate in the guide tube is significantly reduced, the pressure in the guide tube is reduced by using the vacuum pump, and the pig blood on the pig is discharged under the action of the pressure difference, thereby accelerating the pig blood collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the present invention;

[0017] Figure 2 It is the internal structure diagram of the present invention;

[0018] Figure 3 is a cross-sectional view of the present invention;

[0019] Figure 4 It is a structural diagram of a blade of the present invention;

[0020] Figure 5 is a structural diagram of a locking member of the present invention;

[0021] Figure 6 It is a cross-sectional view of the valve body of the present invention.

[0022] Reference numerals: 1, guide tube; 2, guide tube; 3, insert; 31, knife placement groove; 311, worm; 312, coil spring; 313, rack; 32, placement groove; 33, first button; 331, notch; 332, fourth inclined plane; 34, second button; 341, button; 342, button groove; 343, flexible rod; 35, blade; 351, transmission turbine; 352, gear; 353, slider; 354, locking groove; 36, push groove; 37, first inclined plane; 4, limit plate; 5 , locking piece; 51, locking block; 52, connecting rod; 521, third inclined surface; 6, valve body; 61, drainage chamber; 611, liquid inlet; 612, liquid outlet; 613, baffle; 62, vacuum chamber; 621, first valve port; 622, second valve port; 623, sealing rod; 624, third elastic member; 625, limiting ring; 63, moving chamber; 631, moving block; 632, first elastic member; 633, insert rod; 634, second elastic member; 635, second inclined surface; 7, fixing sleeve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0027] like Figure 1-6As shown, the present invention provides a vacuum blood collector, including a guide tube 1 and a drainage tube 2, the guide tube 1 is communicated with the drainage tube 2 and an insert 3 is arranged at one end of the guide tube 1, the insert 3 and the guide tube 1 are respectively arranged at the two ends of the drainage tube 2, and a blood collection bag is sleeved on the guide tube 1. During the blood collection process, the insert 3 is inserted into the incision on the pig's body, and the insert 3 is rotated to open the incision, and the drainage tube 2 is inserted into the incision of the pig's body. The guide tube 1 is used, and the blood in the pig's body flows into the guide tube 1 through the drainage tube 2, and enters the blood collection bag through the guide tube 1, and the pig's blood is collected. During the collection process, the contact between the pig's blood and the outside world is reduced, and the contamination of the pig's blood by bacteria is reduced, which affects the quality of the pig's blood.

[0028] like Figure 2 As shown, a knife placement groove 31 is provided at one end of the guide tube 1 close to the insert 3, a blade 35 is provided in the knife placement groove 31, and a sliding structure is provided in the knife placement groove 31. The sliding structure is used to realize the sliding of the blade 35 in the knife placement groove 31, and the extension and retraction of the blade 35 are realized; during use, the blade 35 is moved to the outside of the knife placement groove 31, and the blade 35 is used to insert the pig's artery; a first button 33 is provided at one end of the guide tube 1 close to the insert 3, and when the pig's body presses the first button 33, the insert 3 is inserted into the pig along with the blade 35. The blade 35 is retracted, and the blood collector is continuously pushed. The insert piece 3 can be inserted into the pig's body along the incision, and the insert piece 3 is rotated to insert the drainage tube 2 into the incision, so that the pig blood in the pig's body is gathered and transferred to the drainage tube 2, so as to collect the pig blood. At the same time, during the pig blood collection process, there is no need to pull out the blade 35 and then insert the insert piece 3 to reduce pig blood leakage. A second button 34 is provided on the outer wall of the drainage tube 2. The second button 34 is used to push the blade 35 out of the blade slot 31 to facilitate the blade 35 to be inserted into the pig's artery.

[0029] like Figure 3 , Figure 4 As shown, the sliding structure includes two groups of slide rails relatively arranged on both sides of the blade groove 31, two groups of sliders 353 are arranged on the side of the blade 35 close to the guide tube 1, and the two groups of sliders 353 are respectively slidably arranged in the two groups of slide rails, a transmission turbine 351 is arranged at the bottom of the blade 35, a worm 311 is arranged in the slide rail, and the worm 311 is arranged along the length direction of the slide rail, a rack 313 is arranged in parallel on one side of the worm 311, and a gear 352 is coaxially connected to the turbine. During the process of pushing out the blade 35, the gear 352 rotates along the rack 313, and the transmission turbine 351 is driven to rotate during the rotation of the gear 352. The transmission turbine 351 moves along the worm 311 and drives the worm 311 to rotate, and the disc spring 312 stores energy; during the process of retracting the blade 35, the disc spring 312 releases energy to drive the worm 311 to rotate, and during the rotation of the worm 311, the transmission turbine 351 is driven to reset, so as to realize the retraction of the blade 35.

[0030] The second button 34 includes a button 341 and a button groove 342. The button 341 is slidably arranged in the button groove 342, and a flexible rod 343 is arranged on the button 341. A push groove 36 is arranged on the inner wall of the knife slot 31. A section of the flexible rod 343 is fixedly connected to the bottom of the blade 35, and the flexible rod 343 is arranged in the push groove 36, and the back wiping is communicated with the button groove 342. When the button is pushed, the flexible rod 343 is driven to move. The flexible rod 343 can be deformed to a certain extent and is always located in the push groove 36. At the same time, When the flexible rod 343 moves with respect to the button 341, it can push the blade 35 to move, and push the blade 35 out of the blade placement slot 31, thereby pushing out the blade 35; a sealing ring is arranged between the push slot 36 and the button slot 342, and the flexible rod 343 is slidably arranged in the sealing ring and is sealed with the sealing ring. When the flexible rod 343 slides, the flexible rod 343 and the sealing ring are always kept sealed, so as to avoid leakage of part of the pig blood through the button slot 342 during use, which not only causes waste of pig blood but also pollutes the outer surface of the blood collector.

[0031] A first inclined surface 37 inclined toward the side where the drainage tube 2 is located is provided on the insert 3, and a knife slot 31 is provided on the first inclined surface 37, and both ends of the knife slot 31 are respectively communicated with the drainage tube 2. During the blood collection process, after part of the pig blood enters the knife slot 31, it is discharged through the bottom of the knife slot 31 to avoid the pig blood accumulating in the knife slot 31 and being unable to be discharged in time; a first button 33 is also provided on the first inclined surface 37, and the first button 33 is provided on the side of the knife slot 31 away from the drainage tube 2. After the blade 35 pierces the pig body, the insert 3 is inserted into the blade edge, the pig body presses the first button 33, the blade 35 is retracted, and the blood collector is continuously inserted, and the blood collector is placed into the pig body to achieve blood collection; with this structure, during the blood collection process, the blade 35 and the insert 3 can be quickly replaced to avoid the blade 35 being pulled out and then inserted into the insert 3, which causes the pig blood to leak and pollute the pig blood.

[0032] like Figure 2 , Figure 5As shown, a placement groove 32 is provided on one side of the knife placement groove 31 close to the first button 33, and a locking member 5 is provided in the placement groove 32. The locking member 5 includes a connecting rod 52 and two groups of locking blocks 51. The two groups of locking blocks 51 are respectively provided at both ends of the connecting rod 52, and a locking groove 354 is correspondingly provided on the slider 353. When the blade 35 moves out of the knife placement groove 31, the two groups of locking blocks 51 are respectively inserted in the two groups of locking grooves 354 to fix the blade 35, so as to avoid the movement of the blade 35 during the blood collection process, thereby affecting the piercing effect of the blade 35. A reset member is provided on the connecting rod 52, and the reset member adopts a spring. The spring is used to ensure that the locking block 51 moves to the side where the knife placement groove 31 is located when the handle is not subjected to external force. A downwardly inclined mounting slope is provided on the side of the locking block 51 close to the knife placement groove 31. When the blade 35 moves out of the knife placement groove 31, the slider When the locking block 51 is in contact with the locking groove 354, the locking block 51 is reset under the action of the spring and inserted into the locking groove 354 to lock the slider 353; an upwardly inclined third slope 521 is provided on the side of the connecting rod 52 close to the knife placing groove 31, a Y-shaped notch 331 is provided at the bottom of the first button 33, and a fourth slope 332 parallel to and matching the third slope 521 is provided in the Y-shaped notch 331. When the first button 33 is pressed downward, the fourth slope 332 contacts the third slope 521, and the connecting rod 52 moves into the placing groove 32 under the guidance of the fourth slope 332, and drives the locking block 51 to move, so that the locking block 51 is disengaged from the locking groove 354.

[0033] The inner diameter of the drainage tube 2 gradually decreases from the side where the insert 3 is located to the side where the guide tube 1 is located. During use, after the incision is opened by using the insert 3, the drainage tube 2 is inserted into the incision, and the skin on both sides of the incision is elastic and adheres to the drainage tube 2. The conical drainage tube 2 is used to shrink the incision to prevent air and impurities in the air from entering the pig's blood; a limit plate 4 is provided on the outside of the drainage tube 2, and a baffle 613 is provided on the side where the guide tube 1 is located, and the baffle 613 is vertically provided on the guide tube 1. The baffle 613 is used to limit the length of the guide tube 1 inserted into the pig's body to prevent the guide tube 1 from being inserted too deeply and causing damage to the pig's internal organs. At the same time, the baffle 613 is provided to the guide tube 1. During the insertion process, the baffle 613 fits on the pig's body to determine the installation angle of the drainage tube 2 on the pig's body.

[0034] like Figure 6As shown, a valve body 6 is arranged on the drainage tube 2, and the valve body 6 includes a drainage chamber 61, and a liquid inlet 611 and a liquid outlet 612 are respectively arranged at both ends of the drainage chamber 61. A baffle 613 is arranged in the drainage chamber 61, and the baffle 613 is connected to the inside of the drainage chamber 61 through a torsion spring. When the flow rate in the drainage chamber 61 reaches a certain value, the baffle 613 rotates to the side where the liquid outlet 612 is located under the impact of the pig blood. The drainage chamber 61 is strong, and the pig blood moves to the blood collection bag through the drainage chamber 61 to realize the collection of pig blood; a vacuum chamber 62 is arranged on one side of the drainage chamber 61, and a first valve port 621 and a second valve port 622 are arranged on the vacuum chamber 62. The first valve port 621 and the second valve port 622 are connected to each other. The two valve ports 622 are respectively arranged on both sides of the baffle 613, and the first valve port 621 and the second valve port 622 are both communicated with the drainage chamber 61. A sealing rod 623 is inserted in the second valve port 622, and the second valve port 622 is opened and closed by the sealing rod 623; a vacuum pump is arranged in the vacuum chamber 62, and the pig blood can be extracted by the vacuum pump to speed up the collection of pig blood; a moving chamber 63 is arranged on the side wall with strong drainage, and a moving block 631 and a first elastic member 632 are arranged in the moving chamber 63. When the baffle 613 is not subjected to external force, the baffle 613 is in the initial position, and at the same time, the baffle 613 presses on the moving block 631, and the moving chamber 63 is in the initial position. A second inclined surface 635 inclined toward the side where the second valve port 622 is located is provided on the side of the moving block 631 close to the baffle 613, and the baffle 613 can slide along the second inclined surface 635 to push the moving block 631; a connecting cavity is provided between the moving cavity 63 and the second valve port 622, and a plug rod 633 is inserted in the connecting cavity, and a second elastic member 634 is sleeved on the plug rod 633. When the moving block 631 is compressed by the baffle 613 and is located in the moving cavity 63, the upper end of the plug rod 633 is located in the moving cavity 63 and is pressed against the second inclined surface 635 under the action of the second elastic member 634; when the moving block 631 moves into the drainage cavity 61, the moving block 631 presses the plug rod 63 3 moves toward the side where the second valve port 622 is located; a third elastic member 624 is sleeved on the sealing rod 623, and a limiting ring 625 is provided at one end of the sealing rod 623 close to the second valve port 622. When the insertion rod 633 moves into the second valve port 622 under the action of the moving block 631, the insertion rod 633 is inserted into the limiting ring 625, and the sealing rod 623 is fixed by the insertion rod 633; ​​when the insertion rod 633 is reset under the action of the second elastic member 634, the insertion rod 633 is separated from the limiting ring 625, and the sealing rod 623 is reset under the action of the third elastic member 624, and the second valve port 622 is opened. The pig blood can enter the vacuum chamber 62 and then be discharged through the second valve port 622.

[0035] A fixing sleeve 7 is sleeved on the outer wall of the guide tube 1, and the blood collection bag is arranged between the fixing sleeve 7 and the guide tube 1. The fixing sleeve 7 is used to fix the blood collection bag on the guide tube 1; the fixing sleeve 7 and the guide tube 1 are connected by threads, and the threaded connection is used to ensure that the connection between the guide tube 1 and the fixing sleeve 7 is more stable.

[0036] Working principle: During use, the button is pushed along the key groove 341. When the button moves along the slide rail, it drives the flexible rod 343 to move. The flexible rod 343 moves along the direction of the push groove 36. At the same time, the flexible rod 343 can be relatively deformed according to the shape of the rubbing. During the movement, the flexible rod 343 pushes the blade 35 to move, so that the blade 35 is pushed out of the blade placement groove 31. During the process of the blade 35 being pushed out, the gear 352 moves along the rack 313 and relatively drives. During the rotation of the gear 352, the transmission turbine 35 is driven. 1 rotates, the transmission turbine 351 drives the worm shaft to rotate, and during the rotation of the worm shaft, the disc spring 312 located below the worm shaft stores energy; when the blade 35 moves to the upper end, the slider 353 contacts the locking block 51 and slides along the third inclined surface 521 on the locking block 51, and the locking block 51 moves into the placement groove 32 under the action of the slider 353; when the blade 35 moves to the top, the locking groove 354 on the slider 353 is correspondingly arranged with the locking block 51, and the locking block 51 is inserted into the locking groove 354 under the action of the reset member, so as to realize Fixing the slider 353; when the blade 35 is completely moved out, the blade 35 is used to pierce the pig's artery, and the blood collection device is continuously pushed so that the blade 35 is completely inserted into the pig's body. When the insert 3 is inserted into the pig's body, the pig's body presses on the first button 33, and the first button 33 is pressed downward under the action of the pig's body, and the Y-shaped plug moves toward the side where the connecting rod 52 is located. The fourth inclined surface 332 on the Y-shaped plug contacts the third inclined surface 521 on the connecting rod 52, and drives the connecting rod 52 to move into the placement slot 32, so that the locking block 5 1 is disengaged from the locking groove 354. When the locking block 51 is disengaged from the locking groove 354, the vortex rod rotates under the action of the disc spring 312, and drives the turbine to move downward along the vortex rod, so that the blade 35 is retracted. During the retraction process, the blade 35 pushes the flexible rod 343 to move, so that the button 341 is reset; after the blade 35 is retracted, the insert piece 3 is continuously pushed until the insert piece 3 is completely inserted into the pig's body, and the insert piece 3 is rotated to open the incision on the pig's body, and the drainage tube 2 is inserted into the incision. The limiting plate 4 is used to limit the depth of the blood collector inserted into the pig's body to achieve blood collection.

[0037] Before blood sampling, the sealing rod 623 is pressed so that the sealing rod 623 is set in the second valve port 622. During the blood sampling process, the pig blood in the guide tube 1 has a large flow rate. After the pig blood hits the baffle 613, the baffle 613 rotates, and the moving block 631 is reset under the action of the first elastic member 632, and the moving cavity 63 is pushed out. During the pushing process, the second inclined surface 635 on the moving block 631 presses the connecting rod 633, and the connecting rod 633 moves downward and is inserted into the limiting groove to lock the sealing rod 623. The pig blood hits the baffle 613 and is discharged. When the pig blood in the guide tube 1 is significantly reduced, the force acting on the baffle 613 is reduced. The baffle 613 is reset under the action of the torsion spring. During the reset process of the baffle 613, the moving block 631 is pushed to the moving chamber 63. At the same time, after the insertion rod 633 breaks away from the restriction of the moving block 631, it is reset under the action of the second elastic member 634 and breaks away from the sealing rod 623. The sealing rod 623 breaks away from the second valve port 622 under the action of the third elastic member 624. The second valve port 622 is opened, and the vacuum pump is started at the same time. The vacuum pump is used to extract pig blood from the pig, thereby accelerating the collection of pig blood. Under the action of the vacuum pump, the pig blood can enter the vacuum chamber 62 through the first valve port 621 and be discharged through the second valve port 622, thereby accelerating the collection of pig blood.

[0038] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum blood collector, characterized in that: The invention comprises a flow guide tube (1) and a drainage tube (2), wherein the flow guide tube (1) is communicated with the drainage tube (2), one end of the drainage tube (2) is provided with an insert (3), the insert (3) and the flow guide tube (1) are respectively provided at the two ends of the drainage tube (2), a blood collection bag is sleeved on the flow guide tube (1), the end of the flow guide tube (1) close to the insert (3) is provided with a knife placement groove (31), the knife placement groove (31) is provided along the radial direction of the flow guide tube (1), a blade (35) is inserted in the knife placement groove (31), the inner wall of the knife placement groove (31) is provided with a sliding structure, the end of the flow guide tube (1) away from the drainage tube (2) is provided with a first button (33), and the outer wall of the drainage tube (2) is provided with a second button (34). ), pressing the first button (33) and the second button (34) to make the blade (35) slide in the blade placement groove (31), the sliding structure comprising two groups of slide rails arranged oppositely on both sides of the blade placement groove (31), two groups of slide blocks (353) are arranged on the side of the blade (35) close to the guide tube (1), the two groups of slide blocks (353) are respectively slidably arranged in the slide rails, a transmission turbine (351) is arranged at the bottom of the blade (35), a worm (311) is arranged in the slide rail along the length direction, the transmission turbine (351) is meshed with the worm (311), a rack (313) is arranged in parallel on one side of the worm (311), and a gear (352) is coaxially arranged on the transmission turbine (351). ), the rack (313) is meshed with the gear (352), a coil spring (312) is further arranged in the slide rail, the coil spring (312) is arranged on the worm (311), the worm (311) rotates to make the coil spring (312) store energy or release energy, one end of the slide rail close to the insert (3) is provided with a locking member (5) for fixing the slider (353), when the slider (353) is located in the locking member (5), the coil spring (312) stores energy, the first button (33) is pressed to make the slider (353) disengage from the locking member (5), and the blade (35) is reset under the action of the coil spring (312), the second button (34) includes a key (341) and a button slot (34 2), the button (341) is slidably arranged on the button groove (342), a flexible rod (343) is arranged on the button (341), a push groove (36) is arranged on the inner wall of the knife placing groove (31), one end of the flexible rod (343) is fixedly connected to the bottom of the blade (35), and the flexible rod (343) is arranged in the push groove (36), a sealing ring is arranged between the push groove (36) and the button groove (342), the flexible rod (343) is slidably arranged in the sealing ring and is sealed with the sealing ring, the button (341) is slid to make the blade (35) slide in the knife placing groove (31), a valve body (6) is arranged on the drainage tube (2), and the valve body (6) includes a drainage cavity (61),The two ends of the drainage chamber (61) are respectively provided with a liquid inlet (611) and a liquid outlet (612); a baffle (613) is provided in the drainage chamber (61); the baffle (613) is connected to the inner wall of the drainage chamber (61) via a torsion spring; when the liquid flow rate of the liquid inlet (611) reaches a limited value, the baffle (613) rotates under the action of the liquid to open the drainage chamber (61); a vacuum chamber (62) is provided on one side of the drainage chamber (61); the vacuum chamber (62) includes a first valve port (621) and a second valve port (622). The first valve port (621) and the second valve port (622) are respectively arranged on both sides of the baffle (613), and the first valve port (621) and the second valve port (622) are both communicated with the drainage cavity (61), a sealing rod (623) is inserted into the second valve port (622), and a vacuum pump is arranged in the vacuum cavity (62), when the liquid flow rate of the liquid inlet (611) is lower than a limited value, the baffle (613) is reset, the sealing rod (623) is separated from the second valve port (622), and the vacuum pump is started.

2. A vacuum blood collector according to claim 1, characterized in that: The insert (3) is provided with a first inclined surface (37) inclined toward the side where the drainage tube (2) is located, the knife placement groove (31) is provided on the first inclined surface (37), the first button (33) is provided on the first inclined surface (37), and the first button (33) is provided on the side of the knife placement groove (31) away from the side where the drainage tube (2) is located, and both ends of the knife placement groove (31) are in communication with the drainage tube (2).

3. A vacuum blood collector according to claim 1, characterized in that: A placement groove (32) is provided on one side of the knife placement groove (31) close to the first button (33), the locking member (5) is arranged in the placement groove (32), the locking member (5) comprises a connecting rod (52) and two groups of locking blocks (51), the two groups of locking blocks (51) are respectively arranged at the two ends of the connecting rod (52), and the slider (353) is correspondingly provided with a locking groove (354), the two ends of the connecting rod (52) are respectively provided with a reset member, and the two groups of locking blocks (51) are respectively provided with a reset member. The tightening block (51) moves toward the side where the locking groove (354) is located under the action of the reset member, and a third inclined surface (521) is provided on the side of the connecting rod (52) close to the knife placement groove (31), and a notch (331) is provided at the bottom of the first button (33), and a fourth inclined surface (332) matching the third inclined surface (521) is provided in parallel with the notch (331). The first button (33) is pressed to move the connecting rod (52) into the placement groove (32).

4. A vacuum blood collector according to claim 1, characterized in that: A limit plate (4) is arranged outside the drainage tube (2), the limit plate (4) is arranged on the side where the drainage tube (1) is located, and the limit plate (4) is arranged vertically on the drainage tube (1).

5. A vacuum blood collector according to claim 1, characterized in that: A movable chamber (63) is provided on the side wall of the drainage chamber (61), and a movable block (631) and a first elastic member (632) are provided in the movable chamber (63), the movable block (631) is pressed against the baffle plate (613), and a second inclined surface (635) inclined toward the second valve port (622) is provided on a side of the movable block (631) close to the baffle plate (613), a connecting chamber is provided between the movable chamber (63) and the second valve port (622), an insertion rod (633) is inserted into the connecting chamber, a second elastic member (634) is sleeved on the insertion rod (633), a third elastic member (624) is sleeved on the sealing rod (623), and a limiting ring (625) is provided at one end of the sealing rod (623) close to the second valve port (622), and the insertion rod (633) is inserted in the limiting ring (625).

6. A vacuum blood collector according to claim 1, characterized in that: The flow guiding tube (1) is sleeved with a fixing sleeve (7), the blood collection bag is arranged between the fixing sleeve (7) and the flow guiding tube (1), and the fixing sleeve (7) and the flow guiding tube (1) are threadedly connected.

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