Feeding device for needle seats of blood taking needles

Abstract

The utility model relates to the technical field of feeding devices, in particular to a blood taking needle base feeding device. Comprising a vibration disc provided with a feeding channel; the feeding channel comprises a feeding section and a screening section, the feeding end of the screening section is connected to the discharging end of the feeding section, and the screening section is provided with a first screening mechanism and a second screening mechanism; the second screening mechanism is provided with a purging assembly, and the purging assembly comprises a first purging pipeline and a second purging pipeline; the air outlet end of the first blowing pipeline is arranged on the side wall of the material screening section, and the air outlet range of the first blowing pipeline can blow the blood taking needle bases stacked on the material screening section off the material screening section; the air outlet end of the second purging pipeline is arranged over the material screening section, and the second purging pipeline is configured to have an air outlet range capable of blowing the reversely conveyed blood taking needle base off the material screening section. The feeding device for the needle seats of the blood taking needles, provided by the utility model, can be used for directionally screening the needle seats of the blood taking needles.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding devices, in particular to a feeding device for a blood collection needle seat. Background Art

[0002] The blood collection needle holder is a thin-walled plastic part with a small end and a large end. The diameter and length of the large end are larger than the small end, and the small end also has a banner plate structure. In the automated production process, due to the irregular shape of the blood collection needle holder, it is difficult to screen the material in a directional manner.

[0003] The existing blood collection needle seat feeding device has the problem of being unable to directional screen the blood collection needle seats, and is unable to make the large end or the small end of the blood collection needle seat face the same direction when discharging, which brings inconvenience to subsequent processing and assembly. Utility Model Content

[0004] The utility model aims to provide a blood collection needle seat feeding device to alleviate the problem that the existing blood collection needle seat feeding device cannot perform directional screening on the blood collection needle seats.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] A blood collection needle seat feeding device comprises: a vibration plate, wherein the vibration plate is provided with a feeding channel;

[0007] The feeding channel comprises a feeding section and a screening section, the feeding end of the screening section is connected to the discharging end of the feeding section, the screening section is provided with a first screening mechanism and a second screening mechanism, and the second screening mechanism is provided on a side of the first screening mechanism away from the feeding section;

[0008] The second screening mechanism is provided with a purge assembly, and the purge assembly includes a first purge pipeline and a second purge pipeline;

[0009] The air outlet end of the first purge pipe is arranged on the side wall of the sieve material section, and the air outlet range of the first purge pipe can blow the blood collection needle seats accumulated on the sieve material section off the sieve material section;

[0010] The air outlet end of the second purge pipe is arranged directly above the sieve material section, and the second purge pipe is configured to have an air outlet range capable of blowing the blood collection needle seat transported in the reverse direction off the sieve material section.

[0011] Furthermore, the screening section is provided with a first opening, the gas outlet end of the first purge pipe faces the first opening, and the gas outlet end of the second purge pipe faces the first opening.

[0012] Furthermore, the second screening mechanism includes a scraper plate, one end of which is connected to the side wall of the screening section, and the other end of which extends obliquely in a direction away from the screening section, forming a screening channel between the scraper plate and the screening section.

[0013] The scraper plate is rotatably connected to the outer side wall of the screening section, and the angle between the scraper plate and the horizontal direction can be adjusted to adjust the blowing range of the second purge pipe. When the scraper plate rotates upward, the angle between the scraper plate and the horizontal direction becomes larger, so that the blowing range of the second purge pipe becomes larger; when the scraper plate rotates downward, the angle between the scraper plate and the horizontal direction becomes smaller, so that the blowing range of the second purge pipe becomes smaller.

[0014] Furthermore, the feed end of the scraper plate is provided with an inclined guide surface, and the guide surface cooperates with the second purge pipe to limit the blowing range of the second purge pipe.

[0015] Furthermore, the first screening mechanism includes a screening assembly, the screening assembly includes a supporting assembly and a screening piece, the screening piece is movably connected to the supporting assembly and is arranged opposite to the screening section, and the screening piece is used to move the blood collection needle seat on the screening section.

[0016] Furthermore, the screening member includes a connecting portion and a swinging portion, the connecting portion is movably connected to the supporting assembly, the swinging portion is arranged above the screening section, and a swinging channel for the one-way passage of the blood collection needle seat is formed between the bottom of the swinging portion and the screening section.

[0017] There is a height difference between the bottom of the swing part and the screening section, namely the swing channel. When the blood collection needle seat with the large end facing the outside of the screening section passes through the swing channel, the swing part will knock it down, so that only the blood collection needle seat with the large end facing the inside of the screening section can pass normally.

[0018] Furthermore, the supporting assembly includes a fixed plate and a connecting block, the first screening mechanism also includes an adjusting assembly, the fixed plate is connected to the vibrating disk, the connecting block is fixed on one side of the fixed plate, and the connecting block is movably connected to the connecting part through the adjusting assembly.

[0019] Both ends of the fixed plate are fixed on the vibrating disk, the connecting block is fixed on the fixed plate, the connecting block is provided with an adjusting component, the connecting part is movably connected with the adjusting component, and the relative position of the connecting part on the supporting component can be adjusted by the adjusting component, thereby adjusting the horizontal distance between the swinging part and the outer wall of the screening section.

[0020] Furthermore, the adjustment assembly includes a bolt and a nut, the connecting portion is provided with a threaded hole, the bolt is passed through the threaded hole, and is fixed to the connecting block by the nut.

[0021] The bolt passes through the threaded holes of the connecting block and the connecting part. Since an external thread is arranged at one end of the bolt passing through the connecting block, the connecting part is screwed on the bolt, so the position of the connecting part on the bolt can be adjusted, thereby adjusting the horizontal distance between the swing part and the outer wall of the screening section.

[0022] Furthermore, a limit plate is provided on the screening material section, and the limit plate is provided on the inner side wall of the screening material section and extends along the extension direction of the screening material section.

[0023] Furthermore, the discharge end of the screening section is connected to a positing section, the inner side wall of the positing section is connected to a positioning plate, the positioning plate is movably connected to the positing section, and the positioning plate can move horizontally in a direction perpendicular to the positing section.

[0024] The utility model brings at least the following beneficial effects:

[0025] The utility model provides a blood collection needle seat feeding device, comprising: a vibrating plate, wherein the vibrating plate is provided with a feeding channel; the feeding channel comprises a feeding section and a screening section, the feeding end of the screening section is connected to the discharging end of the feeding section, the screening section is provided with a first screening mechanism and a second screening mechanism, the second screening mechanism is arranged on the side of the first screening mechanism away from the feeding section; the second screening mechanism is provided with a purge component, the purge component comprises a first purge pipe and a second purge pipe; the air outlet end of the first purge pipe is arranged on the side wall of the screening section, and the air outlet range of the first purge pipe can blow the blood collection needle seats accumulated on the screening section off the screening section; the air outlet end of the second purge pipe is arranged directly above the screening section, and the second purge pipe is configured to have an air outlet range capable of blowing the blood collection needle seats transported in reverse off the screening section.

[0026] After the blood collection needle seat is transported from the feeding section to the screening section, it is screened by the first screening mechanism and the second screening mechanism in turn. At the second screening mechanism, when the blood collection needle seat on the screening section is full of material, the air outlet range of the first purge pipe covers the overall size range of the blood collection needle seat, and the first purge pipe can blow the accumulated blood collection needle seats off the screening section, so that the blood collection needle seats will not be full of material and stacked, thereby achieving rapid and orderly feeding. At the second screening mechanism, when the large end or small end of the blood collection needle seat faces different directions, the air outlet range of the second purge pipe covers the large end of the reversely transported blood collection needle seat, and the blood collection needle seat that meets the requirements for normal transportation will not be affected by the air outlet of the second purge pipe, while the reversely transported blood collection needle seat that does not meet the requirements will be blown off the screening section by the second purge pipe, so that the large ends of the screened blood collection needle seats all face the same direction, which is convenient for subsequent processing and assembly.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 A top view of a blood collection needle holder feeding device provided in an embodiment of the utility model;

[0030] Figure 2 A schematic diagram of the structure of a blood collection needle holder feeding device provided in an embodiment of the utility model;

[0031] Figure 3 A partial enlarged view of the first screening mechanism provided in the embodiment of the utility model;

[0032] Figure 4 A partially enlarged view of the purge assembly provided in an embodiment of the utility model.

[0033] icon:

[0034] 100-vibrating plate; 110-feeding section; 111-rotating ascending section; 112-sorting section; 120-screening section; 130-hanging section; 140-aligning section; 210-screening element; 211-connecting part; 212-swinging part; 220-fixing plate; 230-connecting block; 240-bolt; 310-scraping plate; 320-first opening; 330-first purge pipe; 340-second purge pipe; 410-limiting plate; 500-returning structure; 600-adjusting plate. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0038] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0041] Embodiment 1

[0042] The existing blood collection needle seat feeding device has the problem of being unable to directional screen the blood collection needle seats, and unable to make the large end or the small end of the blood collection needle seat face the same direction when discharging, which brings inconvenience to subsequent processing and assembly.

[0043] In view of this, the embodiment of the utility model provides a blood collection needle seat feeding device, comprising: a vibrating plate 100, the vibrating plate 100 is provided with a feeding channel; the feeding channel includes a feeding section 110 and a screening section 120, the feeding end of the screening section 120 is connected to the discharging end of the feeding section 110, the screening section 120 is provided with a first screening mechanism and a second screening mechanism, the second screening mechanism is arranged on a side of the first screening mechanism away from the feeding section 110; the second screening mechanism is provided with a purge assembly, the purge assembly The purge assembly includes a first purge pipe 330 and a second purge pipe 340; the air outlet end of the first purge pipe 330 is arranged on the side wall of the screening section 120, and the air outlet range of the first purge pipe 330 can blow the blood collection needle seats accumulated on the screening section 120 off the screening section 120; the air outlet end of the second purge pipe 340 is arranged directly above the screening section 120, and the second purge pipe 340 is configured to have an air outlet range that can blow the blood collection needle seats transported in the reverse direction off the screening section 120.

[0044] After the blood collection needle seats are transported from the feeding section 110 to the screening section 120, they are screened in turn by the first screening mechanism and the second screening mechanism. At the second screening mechanism, when the blood collection needle seats on the screening section 120 are full of material, the air outlet range of the first purge pipe 330 covers the size range of the entire blood collection needle seats, and the first purge pipe 330 can blow the accumulated blood collection needle seats off the screening section 120, so that the blood collection needle seats will not be full of material and stacked, thereby achieving rapid and orderly feeding. At the second screening mechanism, when the big end or the small end of the blood collection needle seat faces different directions, the air outlet range of the second purge pipe 340 covers the big end of the blood collection needle seat that is transported in the reverse direction, and the blood collection needle seat that meets the requirements for normal transportation will not be affected by the air outlet of the second purge pipe 340, while the blood collection needle seat that does not meet the requirements for reverse transportation will be blown off the screening section 120 by the second purge pipe 340, so that the big ends of the blood collection needle seats after screening are all facing the same direction, which is convenient for subsequent processing and assembly.

[0045] In an optional manner of this embodiment, the screening section 120 is provided with a first opening 320 , the gas outlet end of the first purge pipe 330 faces the first opening 320 , and the gas outlet end of the second purge pipe 340 faces the first opening 320 .

[0046] See also Figure 4, the side wall outside the sieving section 120 is disconnected to form a first opening 320, and the air outlet end of the first purge pipe 330 is arranged on the inner side wall of the sieving section 120 at the first opening 320 and faces the first opening 320. There is an angle between the first purge pipe 330 and the normally transported blood collection needle seat, and when the blood collection needle seat is full, the first purge pipe 330 blows the accumulated blood collection needle seats from the first opening 320 to the sieving section 120 by blowing. The air outlet end of the second purge pipe 340 is arranged above the first opening 320 and directly facing the first opening 320. The blood collection needle seats whose large and small ends meet the requirements of the transport direction will not be affected by the air outlet of the second purge pipe 340, while the blood collection needle seats whose large and small ends do not meet the requirements of the transport direction and whose opposite ends are blown off the sieving section 120 from the first opening 320 by the second purge pipe 340.

[0047] In an optional manner of this embodiment, the second screening mechanism includes a scraper plate 310, one end of the scraper plate 310 is connected to the side wall of the screening section 120, and the other end extends obliquely in a direction away from the screening section 120, forming a screening channel between the scraper plate 310 and the screening section 120.

[0048] See also Figure 4 The scraper plate 310 gradually decreases in height from the inside to the outside of the screening section 120, so that only when the large end of the blood collection needle seat faces the inside of the screening section 120 and the small end faces the outside of the screening section 120 can it pass through the scraper plate 310, and when the large end of the blood collection needle seat faces the outside of the screening section 120, it will be intercepted by the scraper plate 310 and fall from the first opening 320, and the scraper plate 310 plays a role in limiting the height. The scraper plate 310 cooperates with the second purge pipe 340 to jointly select the blood collection needle seats that meet the requirements for continued forward transportation.

[0049] In an optional manner of this embodiment, the feed end of the scraper plate 310 is provided with an inclined guide surface, and the guide surface cooperates with the second purge pipe 340 to limit the blowing range of the second purge pipe 340 .

[0050] Please continue to see Figure 4 The setting of the guide surface, on the one hand, facilitates the blood collection needle seat to enter the screening channel under the scraper plate 310, and on the other hand, limits the blowing range of the second purge pipe 340, so that the blood collection needle seat with the large end facing the outside of the screening section 120 is blown off by the second purge pipe 340, while the blood collection needle seat with the small end facing the outside of the screening section 120 will not be affected by the blowing of the second purge pipe 340.

[0051] The structure and working principle of the first screening mechanism are described in detail below:

[0052] The first screening mechanism includes a screening assembly, which includes a supporting assembly and a screening piece 210 . The screening piece 210 is movably connected to the supporting assembly and arranged opposite to the screening section 120 . The screening piece 210 is used to move the blood collection needle seat on the screening section 120 .

[0053] See also Figure 3 The screening member 210 is installed on the supporting assembly and can adjust its relative position on the supporting assembly. The screening member 210 is arranged directly above the screening section 120. The blood collection needle seat on the screening section 120 is moved through pendulum-type screening to remove the blood collection needle seat with the large end facing the outside of the screening section 120.

[0054] Furthermore, the screening member 210 includes a connecting portion 211 and a swinging portion 212. The connecting portion 211 is movably connected to the supporting assembly. The swinging portion 212 is disposed above the screening section 120. A swinging channel is formed between the bottom of the swinging portion 212 and the screening section 120 for the one-way passage of the blood collection needle holder.

[0055] Please continue to see Figure 3 , the relative position of the connecting part 211 in the supporting assembly can be adjusted, thereby adjusting the horizontal distance between the swing part 212 and the outer wall of the sieving section 120. There is a height difference between the bottom of the swing part 212 and the sieving section 120, namely, a swing channel. When the blood collection needle holder with the large end facing the outside of the sieving section 120 passes through the swing channel, the swing part 212 will knock it down, so that only the blood collection needle holder with the large end facing the inside of the sieving section 120 can pass normally.

[0056] Furthermore, the supporting assembly includes a fixed plate 220 and a connecting block 230, and the first screening mechanism also includes an adjusting assembly. The fixed plate 220 is connected to the vibration plate 100, and the connecting block 230 is fixed on one side of the fixed plate 220. The connecting block 230 is movably connected to the connecting part 211 through the adjusting assembly.

[0057] See also Figure 3 Both ends of the fixing plate 220 are fixed on the vibration plate 100 , the connecting block 230 is fixed on the fixing plate 220 , the connecting block 230 is provided with an adjusting component, and the connecting portion 211 is movably connected to the adjusting component.

[0058] As an optional manner, the adjustment assembly includes a bolt 240 and a nut. The connecting portion 211 is provided with a threaded hole. The bolt 240 is passed through the threaded hole and is fixed to the connecting block 230 by the nut.

[0059] See also Figure 3The bolt passes through the threaded holes of the connecting block 230 and the connecting part 211. Since an external thread is arranged on one end of the bolt 240 that passes through the connecting block 230, the connecting part 211 is screwed onto the bolt 240. Therefore, the position of the connecting part 211 on the bolt 240 can be adjusted, thereby adjusting the horizontal distance between the swing part 212 and the outer wall of the screening section 120.

[0060] As another optional manner, an elastic telescopic member may be provided between the connecting block 230 and the connecting portion 211 , and the horizontal distance between the swinging portion 212 and the outer wall of the screening section 120 may be adjusted by adjusting the length of the elastic telescopic member.

[0061] In addition, the horizontal position of the screening member 210 may be adjusted by structures such as a slider and a slide bar, which is not limited here.

[0062] After the blood collection needle seats are transported from the feeding section 110 to the screening section 120 along the feeding channel, the blood collection needle seats with their large ends facing the inside of the screening section 120 are screened out in a directional manner under the action of the screening member 210 in the first screening mechanism, thereby achieving preliminary directional screening of the blood collection needle seats. After the preliminary screening by the first screening mechanism, there will still be a small number of blood collection needle seats with their large ends facing the outside of the screening section 120, which will be further screened by the second screening mechanism.

[0063] In an optional manner of this embodiment, a limiting plate 410 is provided on the screening section 120 , and the limiting plate 410 is provided on the inner side wall of the screening section 120 and extends along the extension direction of the screening section 120 .

[0064] See also Figure 2 The limiting plate 410 is arranged on the inner side wall of the screening section 120, and the limiting plate 410 is bent and extended along the extension direction of the screening section 120. The limiting plate 410 can guide and limit the blood collection needle seat conveyed by the screening section 120, so that the blood collection needle seat can be conveyed quickly and orderly.

[0065] In an optional manner of this embodiment, the discharge end of the screening section 120 is connected to the alignment section 140, the inner side wall of the alignment section 140 is connected to the adjustment plate 600, the adjustment plate 600 is movably connected to the alignment section 140, and the adjustment plate 600 can move horizontally in a direction perpendicular to the alignment section 140.

[0066] See also Figure 2 The alignment section 140 is connected to the discharge end of the screening section 120, and the blood collection needle seat is connected to the machine addition outlet after passing through the alignment section 140. The adjustment plate 600 is connected to the side wall of the alignment section 140 through a connecting piece, and the distance between the adjustment plate 600 and the side wall of the alignment section 140 is adjusted by adjusting the connecting piece.

[0067] It should also be noted that, in the present embodiment, the feeding section 110 includes a rotating ascending section 111 and a material sorting section 112, and the material sorting section 112 is connected between the rotating ascending section 111 and the material hanging section 130. The rotating ascending section 111 has a spiral ascending channel, and the bottom wall of the rotating ascending section 111 has a conical structure, and the blood collection needle seat in the rotating ascending section 111 will slide toward the side wall. The material sorting section 112 has a tubular channel with an arc, and the corresponding arc of the material sorting section 112 is 180°. The vibration disk 100 is provided with a return material structure 500 along the circumferential direction at the bottom of the material sorting section 112, the material hanging section 130 and the material screening section 120.

[0068] The following describes the working process of the blood collection needle seat feeding device:

[0069] See also Figure 1 First, add the blood collection needle seat into the vibration disk 100, and the base applies force to the material in the vibration disk 100, so that the blood collection needle seat starts to move counterclockwise along the rotating ascending section 111. After the rotation and climbing, the material enters the material sorting section 112 to start sorting. During the sorting process, the material moves along the edge. After the sorting is completed, the blood collection needle seat enters the hanging section 130, and the material is hung by tilting the stainless steel plate and the steel wire. Then the blood collection needle seat enters the screening section 120, and the first screening mechanism performs pendulum screening through the screening piece 210, and knocks the reverse material down into the return material structure 500. The second screening mechanism screens the blood collection needle seats whose directions meet the requirements through the cooperation of the first purge pipe 330, the second purge pipe 340 and the scraper plate 310. The blood collection needle seat finally enters the positive section 140 and connects to the machine added parts outlet.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A blood collection needle holder feeding device, characterized in that: include: A vibration plate (100), wherein the vibration plate (100) is provided with a feeding channel; The feeding channel comprises a feeding section (110) and a screening section (120), the feeding end of the screening section (120) is connected to the discharging end of the feeding section (110), the screening section (120) is provided with a first screening mechanism and a second screening mechanism, the second screening mechanism being arranged on a side of the first screening mechanism away from the feeding section (110); The second screening mechanism is provided with a purge assembly, and the purge assembly comprises a first purge pipeline (330) and a second purge pipeline (340); The air outlet end of the first purge pipe (330) is arranged on the side wall of the sieve material section (120), and the air outlet range of the first purge pipe (330) is capable of blowing the blood collection needle seats accumulated on the sieve material section (120) off the sieve material section (120); The air outlet end of the second purge pipe (340) is arranged directly above the sieving section (120), and the second purge pipe (340) is configured to have an air outlet range capable of blowing the reversely transported blood collection needle seat off the sieving section (120).

2. The blood collection needle seat feeding device according to claim 1, characterized in that: The screening section (120) is provided with a first opening (320), the gas outlet end of the first purge pipe (330) faces the first opening (320), and the gas outlet end of the second purge pipe (340) faces the first opening (320).

3. The blood collection needle seat feeding device according to claim 2, characterized in that: The second screening mechanism comprises a scraper plate (310), one end of the scraper plate (310) is connected to the side wall of the screening section (120), and the other end of the scraper plate (310) extends obliquely in a direction away from the screening section (120), and a screening channel is formed between the scraper plate (310) and the screening section (120).

4. The blood collection needle seat feeding device according to claim 3, characterized in that: The feed end of the scraper plate (310) is provided with an inclined guide surface, and the guide surface cooperates with the second purge pipe (340) to limit the blowing range of the second purge pipe (340).

5. The blood collection needle seat feeding device according to any one of claims 1 to 4, characterized in that: The first screening mechanism comprises a screening assembly, and the screening assembly comprises a supporting assembly and a screening piece (210). The screening piece (210) is movably connected to the supporting assembly and is arranged opposite to the screening section (120). The screening piece (210) is used to move the blood collection needle seat on the screening section (120).

6. The blood collection needle seat feeding device according to claim 5, characterized in that: The screening member (210) comprises a connecting portion (211) and a swinging portion (212); the connecting portion (211) is movably connected to the supporting assembly; the swinging portion (212) is arranged above the screening section (120); and a swinging channel for a blood collection needle holder to pass through in one direction is formed between the bottom of the swinging portion (212) and the screening section (120).

7. The blood collection needle seat feeding device according to claim 6, characterized in that: The supporting assembly comprises a fixing plate (220) and a connecting block (230); the first screening mechanism further comprises an adjusting assembly; the fixing plate (220) is connected to the vibrating plate (100); the connecting block (230) is fixed to one side of the fixing plate (220); and the connecting block (230) is movably connected to the connecting portion (211) via the adjusting assembly.

8. The blood collection needle seat feeding device according to claim 7, characterized in that: The adjustment assembly comprises a bolt (240) and a nut; the connection portion (211) is provided with a threaded hole; the bolt (240) passes through the threaded hole and is fixed to the connection block (230) via the nut.

9. The blood collection needle seat feeding device according to claim 1, characterized in that: A limiting plate (410) is provided on the screening material section (120); the limiting plate (410) is arranged on the inner side wall of the screening material section (120) and extends along the extension direction of the screening material section (120).

10. The blood collection needle seat feeding device according to claim 1, characterized in that: The discharge end of the screening section (120) is connected to a positioning section (140), the inner side wall of the positioning section (140) is connected to a positioning plate (600), the positioning plate (600) is movably connected to the positioning section (140), and the positioning plate (600) can move horizontally in a direction perpendicular to the positioning section (140).

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