CN114874890A - Sampling tube for detecting new coronavirus - Google Patents

Abstract

The invention discloses a sampling tube for detecting new coronavirus, which comprises a tube body and a tube cover, wherein the tube cover comprises: the pipe cover main body is detachably connected to one end of the pipe body, and a second accommodating cavity is formed in the pipe cover main body; the valve core can selectively enable the second accommodating cavity to be communicated with the inner cavity of the tube body or communicated with the outside of the sampling tube; a spring for applying an acting force to the valve element; sealed subsides, paste at the top of tube cap main part, when sealed subsides do not tear, the case lets the second hold the inner chamber intercommunication of chamber and body, tears the back, and the case lets the second hold the outside intercommunication of chamber and sampling pipe. In the process of extracting the sample solution, the sampling tube does not need to be screwed off the tube cap, a liquid transferring gun is not needed, and quantitative sample solution can be released into the deep hole plate only by inverting the sampling tube and tearing off the sealing paste, so that the operation is simple, the efficiency is high, the consumed time is short, and meanwhile, the pain caused by long-time screwing of the tube cap by fingers can be avoided because the tube cap does not need to be screwed off.

Description

Sampling tube for detecting new coronavirus

Technical Field

The invention relates to the field of medical appliances, in particular to a sampling tube for detecting a new coronavirus.

Background

The prior virus sampling tube consists of a tube body and a tube cover, the tube cover is screwed on the top of the tube body through threads, when a detector detects a sample in one virus sampling tube, the tube cover needs to be unscrewed, then a certain amount of sample solution is absorbed in the tube body by a pipette gun and then is added into the deep hole plate, and then the tube cover is screwed back to the top of the tube body, in the process, on one hand, each time a tester extracts the sample solution of one virus sampling tube, the process of opening and closing the cover needs to be completed once, therefore, when the number of the virus sampling pipes is very large, fingers can frequently extrude the anti-skid lines on the outer wall of the pipe cover in the process of repeatedly opening and closing the cover, the finger surface is embossed and painful, and on the other hand, a pipette is required to transfer the sample solution during each extraction, so the extraction process is also complicated.

Based on this, the inventor prepares to modify the sampling tube so that when the sample solution is extracted, the sample solution in the sampling tube can be directly released into the deep-hole plate without unscrewing the tube cover and using the pipette, and the released amount is fixed.

Disclosure of Invention

The invention aims to solve the technical problem of providing a novel sampling tube for detecting coronavirus, which can directly release the sample solution in the sampling tube into a deep-hole plate without unscrewing a tube cover or using a pipette when extracting the sample solution, and the released amount is fixed.

The technical scheme adopted by the invention for solving the technical problems is as follows: the sampling tube comprises a tube body and a tube cover, wherein the bottom of the tube body is closed, the top of the tube body is open, a first accommodating cavity is formed in the tube body, and the tube cover comprises a tube cover main body, a valve core, a spring and a sealing paste;

the tube cover main body is detachably connected to the top of the tube body, and when the tube cover main body is tightly connected with the top of the tube body, a gap at the joint of the tube cover main body and the tube body is sealed; a second accommodating cavity is formed in the tube cap main body, a first through hole is formed in the bottom of the second accommodating cavity, a second through hole is formed in the top of the second accommodating cavity, and a sleeve arranged along the axis is fixed in the second accommodating cavity;

the valve core is sleeved in the sleeve and can move along the axis of the sleeve; the valve core comprises a first hollow body and a second hollow body which are separated from each other, the first hollow body is inserted into the first through hole and keeps sealed with the inner wall of the first through hole, and the second hollow body is inserted into the second through hole and keeps sealed with the inner wall of the second through hole; the bottom of the first hollow body is provided with a first liquid inlet, the top of the first hollow body is provided with a first liquid outlet, the first liquid inlet is always positioned outside the second accommodating cavity and communicated with the first accommodating cavity of the pipe body in the moving process of the valve core, the bottom of the second hollow body is provided with a second liquid inlet, the top of the second hollow body is provided with a second liquid outlet, and the second liquid outlet is always positioned outside the second accommodating cavity in the moving process of the valve core;

the spring is arranged in the tube cover main body and is used for applying an acting force of upward movement to the valve core;

the sealing paste is pasted on the top surface of the tube cover main body in a tearing way and seals the second through hole;

when the sealing paste is adhered to the top of the tube cap main body and seals the second through hole, the spring applies an acting force moving upwards to the valve core, so that the upper end surface of the second hollow body of the valve core is abutted to the bottom surface of the sealing paste, and meanwhile, the valve core is in a liquid inlet state, namely, the inner cavity of the first hollow body is communicated with the second accommodating cavity through the first liquid outlet, and the inner cavity of the second hollow body cannot be communicated with the second accommodating cavity; when the sealing paste is torn off and the second through hole is not closed, the spring pushes the valve core to the highest point at the moment, so that the valve core is in a liquid outlet state, namely, the inner cavity of the second hollow body is communicated with the second accommodating cavity through the second liquid inlet at the moment, and the inner cavity of the first hollow body cannot be communicated with the second accommodating cavity.

Furthermore, a plug body plugged into the opening of the pipe body is formed at the bottom of the pipe cover main body, a spring accommodating cavity communicated with the first through hole is formed in the plug body, a screen plate is arranged on the bottom surface of the spring accommodating cavity, and the screen plate is fixed at the bottom of the plug body;

the spring is arranged in the spring accommodating cavity, the top of the spring is abutted against the bottom surface of the first hollow body, and the bottom of the spring is abutted against the upper surface of the net plate.

Further, the first liquid inlet is formed in the end face of the bottom of the first hollow body;

the number of the first liquid discharge ports is four, and the first liquid discharge ports are arranged around the top of the first hollow body in a surrounding mode;

the number of the second liquid inlets is four, and the second liquid inlets are arranged around the bottom of the second hollow body in a surrounding manner;

the second liquid outlet is formed in the end face of the top of the second hollow body;

furthermore, a first sealing ring is arranged in the first through hole and used for sealing a gap between the outer wall of the first hollow body and the inner wall of the first through hole, and the first liquid inlet is always positioned below the first sealing ring in the moving process of the valve core;

a second sealing ring is arranged in the second through hole and used for sealing a gap between the outer wall of the second hollow body and the inner wall of the second through hole, and the second liquid outlet is always positioned above the second sealing ring in the moving process of the valve core;

the inner wall of the bottom of the sleeve is provided with a third sealing ring, and the inner wall of the top of the sleeve is provided with a fourth sealing ring;

when the valve core is in a liquid inlet state, the first liquid outlet is positioned between the first sealing ring and the third sealing ring, and the second liquid inlet is positioned between the third sealing ring and the fourth sealing ring; when the valve core is in a liquid outlet state, the first liquid outlet is positioned between the third sealing ring and the fourth sealing ring, and the second liquid inlet is positioned between the second sealing ring and the fourth sealing ring.

Furthermore, a sinking groove is formed in the top of the pipe cover main body;

the sealing paste comprises a diaphragm and a baffle fixed with the diaphragm into a whole, the diaphragm is adhered to the top surface of the tube cap main body through an adhesive, and the baffle is clamped in the sunken groove and seals the second through hole so as to block the upward movement of the valve core.

Further, the sleeve is fixed on the inner wall of the second accommodating cavity through four supporting rods arranged in a cross shape.

Furthermore, the top surface of the second accommodating cavity is an inclined surface, and the inclined direction is gradually inclined upwards from one side far away from the second through hole to one side close to the second through hole.

Further, when the valve core is in the liquid inlet state, the maximum capacity of the second accommodating cavity is between 200ul and 300 ul.

The invention has the beneficial effects that: in the whole process of extracting the sample solution, the sampling tube does not need to be screwed off, a liquid-transferring gun is not needed, and quantitative sample solution can be released into the hole cavity of the deep hole plate only by inverting the sampling tube and tearing off the sealing paste; therefore, compared with the mode that the tube cap needs to be unscrewed, the tube cap needs to be screwed back after the sample solution is sucked by the pipette gun at present, the operation is simpler, the efficiency is higher, the consumed time is shorter when the sample solution is extracted, and meanwhile, when the sample solution is extracted in a large scale, the tube cap does not need to be screwed, so that the pain caused by frequent screwing of the tube cap by fingers can be avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view within the dashed box of FIG. 1;

FIG. 3 is a view taken along line A-A of FIG. 2;

FIG. 4 is a perspective view of the valve cartridge of the present invention;

FIG. 5 is a schematic view of the present invention showing the release of sample solution after tearing the seal;

fig. 6 is an enlarged view within the dashed box in fig. 5.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.

As shown in FIGS. 1 to 4, the present invention provides a sampling tube for detecting a new coronavirus, which comprises a tube body 1 and a tube cap 2. The bottom of the pipe body 1 is closed, the top of the pipe body is open, a first containing cavity 11 is formed inside the pipe body, external threads 12 are arranged at the position of the top opening, and a preserving fluid 3 is contained in the first containing cavity 11. The tube cover 2 comprises a tube cover main body 21, a valve core 22, a spring 23 and a sealing paste 24.

The bottom of tube cap main part 21 is provided with internal thread 219, and tube cap main part 21 through this internal thread 219 with the detachable connection of cooperation of external screw thread 12 is in the top of body 1, and, tube cap main part 21 still is provided with a sealing ring 26 in the top of internal thread 219, and when tube cap main part 21 screwed up the top at body 1, sealing ring 26 can be sealed with the clearance of both junctions. The inside of tube cap main part 21 is equipped with the second and holds chamber 211, and the second bottom that holds chamber 211 is equipped with first through-hole 212, and the top is equipped with second through-hole 213, and the second is held the inside of chamber 211 and is fixed with a sleeve 214, and the axis of this sleeve 214 and the axis collineation of tube cap main part 21, simultaneously, first through-hole 212 with the axis of second through-hole 213 also with the axis collineation of sleeve 214.

The valve core 22 is disposed in the sleeve 214 and can move along the axis of the sleeve 214. The valve body 22 includes a first hollow body 221, a second hollow body 222, and a solid body 223, the first hollow body 221 is inserted into the first through hole 212 and sealed with an inner wall of the first through hole 212, the second hollow body 222 is inserted into the second through hole 213 and sealed with an inner wall of the second through hole 213, and the solid body 223 is connected between and separates the first hollow body 221 and the second hollow body 222. The first liquid inlet 221a is formed in the bottom of the first hollow body 221, the first liquid outlet 221b is formed in the top of the first hollow body 221, the first liquid inlet 221a is always located outside the second accommodating cavity 211 and communicated with the first accommodating cavity 11 of the pipe body 1 in the moving process of the valve core 22, the second liquid inlet 222a is formed in the bottom of the second hollow body 222, the second liquid outlet 222b is formed in the top of the second hollow body 222, and the second liquid outlet 222b is always located outside the second accommodating cavity 211 in the moving process of the valve core 22.

The spring 23 is installed in the cap body 21 to apply an upward moving force to the spool 22.

The seal strip 24 is detachably attached to the top surface of the cap body 21 and seals the second through hole 213.

When the sealing paste 24 is adhered to the top of the cap body 21 and closes the second through hole 213, the spring 23 applies an upward force to the valve core 22, so that the upper end surface of the second hollow body 222 of the valve core 22 abuts against the bottom surface of the sealing paste 24, and meanwhile, the valve core 22 is in a liquid inlet state, that is, the first liquid outlet 221b is located between the first through hole 212 and the sleeve 214, the inner cavity of the first hollow body 221 is communicated with the second accommodating cavity 211 through the first liquid outlet 221b, the second liquid inlet 222a is located in the sleeve 214, and the inner cavity of the second hollow body 222 cannot be communicated with the second accommodating cavity 211 through the second liquid inlet 222 a. When the sealing tape 24 is torn off and does not close the second through hole 213 any more, the spring 23 pushes the valve core 22 to the highest point, so that the valve core 22 is in a liquid outlet state, that is, the second liquid inlet 222a is located between the sleeve 214 and the second through hole 213, the inner cavity of the second hollow body 222 is communicated with the second accommodating cavity 211 through the second liquid inlet 222a, the first liquid outlet 221b is located in the sleeve 214, and the inner cavity of the first hollow body 221 cannot be communicated with the second accommodating cavity 211 through the first liquid outlet 221b, as shown in fig. 6.

As can be seen from the above structure, when the sealing tape 24 is not torn off (i.e. adhered to the top of the tube cap main body 21 and closing the second through hole 213), although the spring 23 pushes the valve core 22 upward, the valve core 22 cannot move due to the blocking of the sealing tape 24, and the valve core 22 can only stay in the liquid inlet state, at this time, if the sampling tube is turned upside down, the preserving fluid 3 in the first accommodating cavity 11 of the tube body 1 enters the first hollow body 221 from the first liquid inlet 221a, and then enters the second accommodating cavity 211 from the first liquid outlet 221b, but since the second liquid inlet 222a is retracted into the sleeve 214, the preserving fluid cannot enter the second liquid inlet 222 from the second liquid outlet 222a, and therefore, the liquid preserved in the sampling tube cannot leak out. Once the seal 24 is torn off, the valve core 22 will lose its blocking, the valve core 22 will be pushed to the liquid-out state under the action of the spring 23, at this time, the liquid in the second accommodating cavity 211 can enter the second hollow body 222 through the second liquid inlet 222a, and then be discharged out of the sampling tube from the second liquid outlet 222b, meanwhile, since the valve core 22 moves, the first liquid outlet 221b will retract into the sleeve 214, so the liquid in the first accommodating cavity 11 of the tube body 1 cannot enter the second accommodating cavity 211 through the first hollow body 221. Therefore, when the sampling tube is used for extracting a sample solution, the tube cover 2 does not need to be unscrewed, a liquid-transferring gun does not need to be used, the sampling tube is placed above the corresponding hole cavity of the deep hole plate after being inverted, then the sealing sticker 24 is torn off by hand, the sample solution can be released into the hole cavity, and in the releasing process, the valve core 22 blocks the communication between the first accommodating cavity 11 and the second accommodating cavity 211, so that the released amount is fixed, the sample solution enters the second accommodating cavity 211 in advance, and after the release, the residual sample solution in the first accommodating cavity 11 cannot enter the second accommodating cavity 211, so that the valve core 22 plays a role in preventing the residual sample solution in the first accommodating cavity 11 from leaking.

Further, the bottom of the cap body 21 is formed with a plug 215 that can be inserted into the opening of the tubular body 1, the plug 215 is disposed inside the internal thread 219, there is a gap between the plug 215 and the internal thread 219, and the sealing ring 26 is mounted on the top of the gap. The plug body 25 is provided with a spring accommodating cavity 216 communicated with the first through hole 212 inside, a mesh plate 25 is arranged on the bottom surface of the spring accommodating cavity 216, and the mesh plate 25 is fixed with the bottom surface of the plug body 215. The bottom of the first hollow body 221 extends into the spring receiving chamber 216, and the bottom of the first hollow body 221 is formed with a force-receiving surface 224 having an enlarged diameter. The spring 23 is arranged in the spring accommodating cavity 216, and the top of the spring 23 is against the force bearing surface 224 of the first hollow body 221, and the bottom is against the upper surface of the mesh plate 25.

When the valve core 22 is in the liquid inlet state, the force bearing surface 224 of the first hollow body 221 presses the spring 23 downwards, so that the spring 23 is in a compressed state. When the valve core 22 is in the liquid-discharging state, the spring 23 pushes the force-bearing surface 224 to move the valve core 22 to the highest point, and at the same time, the upper end of the second hollow body 222 extends out of the second through hole 213.

Wherein, the mesh plate 25 has the following functions: in order to prevent the swab from being stuck into the first hollow body 221 and affecting the movement of the first hollow body 221 when the sampling tube is then inverted, a mesh plate 25 is intentionally added to block the swab from entering the first hollow body 221.

Preferably, the first liquid inlet 221a is opened on the end surface of the bottom of the first hollow body 221; the number of the first liquid discharge ports 221b is four, and the first liquid discharge ports are arranged around the top of the first hollow body 221; the number of the second liquid inlets 222a is also four, and the second liquid inlets are arranged around the bottom of the second hollow body 222; the second liquid discharge port 222b is opened in an end surface of the top of the second hollow body 222.

In addition, the invention also provides a plurality of sealing rings at corresponding positions, which are as follows:

a first sealing ring 2a is arranged in the first through hole 212 and used for sealing a gap between the outer wall of the first hollow body 221 and the inner wall of the first through hole 212, and in the moving process of the valve core 22, the first liquid inlet 221a is always positioned below the first sealing ring 2 a;

a second sealing ring 2b is arranged in the second through hole 213 and is used for sealing a gap between the outer wall of the second hollow body 222 and the inner wall of the second through hole 213, and in the moving process of the valve core 22, the second liquid outlet 222b is always positioned above the second sealing ring 2 b;

a third sealing ring 2c is arranged on the inner wall of the bottom of the sleeve 214, and a fourth sealing ring 2d is arranged on the inner wall of the top of the sleeve;

when the valve core 22 is in the liquid inlet state, the first liquid outlet 221b is located between the first sealing ring 2a and the third sealing ring 2c, and the second liquid inlet 222a is located between the third sealing ring 2c and the fourth sealing ring 2d, see fig. 2; when the valve core 22 is in the liquid outlet state, the first liquid outlet 221b is located between the third sealing ring 2c and the fourth sealing ring 2d, and the second liquid inlet 222a is located between the second sealing ring 2b and the fourth sealing ring 2d, see fig. 6.

In addition, a sinking groove 217 is arranged at the top of the tube cover main body 21; the sealing sticker 24 includes a membrane 241 and a baffle 242 fixed with the membrane 241 into a whole, the membrane 241 is adhered to the top surface of the tube cover main body 21 through an adhesive, the membrane 241 has a clamping portion 2411 which is not adhered to the tube cover main body 21, the baffle 242 is clamped in the sunken groove 217 and is closed to the second through hole 213, so that the valve core 22 is blocked by upward movement. When the sealing sticker 24 needs to be torn off, the clamping portion 2411 of the membrane 241 is clamped by fingers, then the membrane 241 with the baffle 242 can be torn off by force, after the membrane is torn off, the baffle 242 is not blocked, the valve core 22 moves upwards under the pushing of the spring 23, the upper end of the second hollow body 222 extends out of the second through hole 213, and the valve core 22 is switched to the liquid outlet state.

Preferably, referring to fig. 3, the sleeve 214 is fixed on the inner wall of the second receiving cavity 211 by four support rods 218 arranged in a cross shape, and both the sleeve 214 and the support rods 218 are part of the tube cover main body 21 and are formed by one-time injection molding with the other parts of the tube cover main body 21.

Preferably, when releasing the sample solution, there is no residue in order to ensure that the sample solution in the second containing cavity 211 can be completely released. The top surface of the second accommodating chamber 211 is designed to be an inclined surface, and the inclined direction is gradually inclined upwards from the side far away from the second through hole 213 to the side near the second through hole 213.

Preferably, when the valve core 22 is in the liquid-feeding state, the maximum capacity of the second accommodating cavity 211 is between 200ul and 300ul, that is, when the valve core 22 is in the liquid-feeding state, 200ul to 300ul of liquid enters the second accommodating cavity 211 after the sampling tube is inverted, which is consistent with the extraction amount of the sample solution in the sampling tube currently extracted by using a pipette.

The using method and the working principle of the invention are as follows.

Before use, referring to fig. 1 and 2, the sampling tube of the present invention is in the following state:

the first containing cavity 11 of the tube body 1 is filled with a sample preserving fluid 3;

the tube cover main body 21 is screwed on the top of the tube body 1, and the sealing ring 26 seals a gap between the tube cover main body 21 and the open end of the tube body 1;

the valve core 22 is in a liquid inlet state;

during sampling, the operation method is as follows:

firstly, rotating the tube cover 2, and unscrewing the whole tube cover 2 from the top of the tube body 1;

then, the medical staff samples the nasal cavity or the pharyngeal portion of the object to be collected by using the swab, puts the front end of the swab into the tube body 1 after sampling, and then breaks the swab to enable the front end of the swab to fall into the first accommodating cavity 11;

then, after one group of sampling is completed (for example, when a group of new coronavirus is sampled by ten people, ten swabs are put in the tube body 1 after one group of sampling is completed), the tube cover 2 is screwed back to the top of the tube body 1, so that the opening on the top of the tube body 1 is closed;

then, storing the sampling tube in a low-temperature environment and conveying the sampling tube to a laboratory for detection;

it should be noted that: the sampling process is consistent with the sampling mode of the current common operation, the pipe cover 2 needs to be unscrewed, and the pipe cover 2 is closed after the sampling is finished;

during detection, the operation method for extracting the sample solution is different from the current method, and specifically comprises the following steps:

firstly, a hand of a tester holds the tube body 1 of the sampling tube, then the sampling tube 1 is inverted, the tube cap 2 is positioned below the tube body 1, at this time, because the valve core 22 is in a liquid inlet state, the sample solution in the first containing cavity 11 of the tube body 1 enters the first hollow body 221 from the first liquid inlet 221a after passing through the screen plate 25, and then enters the second containing cavity 211 from the first liquid outlet 221b, and the second containing cavity 211 is filled;

subsequently, the sampling tube is moved above the deep-hole plate, and the tube cover 2 is aligned with one of the holes of the deep-hole plate (not shown in the figure);

then, the inspector uses the other hand to clamp the clamping portion 2411 of the sealing sticker 24, and then tears off the sealing sticker 24 by force, after tearing off, the valve core 22 is out of the block, the valve core 22 moves under the urging of the spring 23, after moving, the end of the second hollow body 222 extends out of the second through hole 213, the valve core 22 is switched to the liquid outlet state, and then the sample solution previously pre-entered into the second cavity 211 enters the second hollow body 222 through the second liquid inlet 222a, and then is discharged from the second liquid outlet 222b (see fig. 5 and 6), and is released into the hole below.

As can be seen from the use method, in the whole process of extracting the sample solution, the sampling tube does not need to use a liquid-transferring gun, does not need to screw down a tube cover, and can release quantitative sample solution into the hole cavity of the deep hole plate only by turning the sampling tube upside down and tearing off the sealing paste 24. Therefore, compared with the mode that the tube cap needs to be unscrewed when the sample solution is extracted, the tube cap needs to be screwed back after the sample solution is sucked by the pipette, the operation of extracting the sample solution by the sampling tube is simpler, the efficiency is higher, the consumed time is shorter, and meanwhile, when the sample solution is extracted in a large scale, the tube cap does not need to be screwed, so that the pain caused by frequent screwing of the tube cap by fingers can be avoided.

In addition, the following arrangement can be added to the structure of the sampling tube:

the side wall of the pipe cover main body 21 is provided with a button, the pipe cover main body 21 is internally provided with a locking piece matched with the button, the valve core 22 is locked by the locking piece in a normal state, the movement of the valve core 22 is limited, and after the button is pressed, the button can drive the locking piece to unlock the valve core 22, so that the movement of the valve core 22 is not limited. Thus, after the sealing tape 24 is torn off, the valve core 22 does not move immediately, the button on the side wall of the tube cover main body 21 needs to be pressed to unlock the valve core 22, and then the valve core 22 moves and is converted into a liquid outlet state to release the sample solution.

The advantages of the design are as follows: the situation that the valve core 22 jacks the sealing paste 24 when the viscosity of the sealing paste 24 is reduced can be avoided.

The button and lock are of relatively conventional construction and the details of which are within the skill of those in the art and therefore not described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A sampling tube for detecting new coronavirus is characterized by comprising a tube body (1) and a tube cover (2), wherein the bottom of the tube body (1) is closed, the top of the tube body is open, and a first accommodating cavity (11) is formed inside the tube body, and the tube cover (2) comprises a tube cover main body (21), a valve core (22), a spring (23) and a sealing paste (24);

the tube cover main body (21) is detachably connected to the top of the tube body (1), and when the tube cover main body (21) is tightly connected with the top of the tube body (1), a gap at the joint of the tube cover main body and the tube body is sealed; a second accommodating cavity (211) is formed in the tube cover main body (21), a first through hole (212) is formed in the bottom of the second accommodating cavity (211), a second through hole (213) is formed in the top of the second accommodating cavity, and a sleeve (214) arranged along the axis is fixed in the second accommodating cavity (211);

the valve core (22) is sleeved in the sleeve (214) and can move along the axis of the sleeve (214); the valve core (22) comprises a first hollow body (221) and a second hollow body (222) which are separated from each other, the first hollow body (221) is inserted into the first through hole (212) and keeps a seal with the inner wall of the first through hole (212), and the second hollow body (222) is inserted into the second through hole (213) and keeps a seal with the inner wall of the second through hole (213); the bottom of the first hollow body (221) is provided with a first liquid inlet (221a), the top of the first hollow body is provided with a first liquid outlet (221b), in the moving process of the valve core (22), the first liquid inlet (221a) is always positioned outside the second accommodating cavity (211) and communicated with the first accommodating cavity (11) of the valve body (1), the bottom of the second hollow body (222) is provided with a second liquid inlet (222a), the top of the second hollow body is provided with a second liquid outlet (222b), and in the moving process of the valve core (22), the second liquid outlet (222b) is always positioned outside the second accommodating cavity (211);

the spring (23) is installed in the tube cover main body (21) and is used for applying an acting force moving upwards to the valve core (22);

the sealing paste (24) is pasted on the top surface of the tube cover main body (21) in a tearing way and seals the second through hole (213);

when the sealing paste (24) is pasted on the top of the tube cover main body (21) and the second through hole (213) is closed, the spring (23) exerts an upward moving acting force on the valve core (22) at the moment, so that the upper end surface of the second hollow body (222) of the valve core (22) is abutted against the bottom surface of the sealing paste (24), and meanwhile, the valve core (22) is in a liquid inlet state, namely, the inner cavity of the first hollow body (221) is communicated with the second accommodating cavity (211) through the first liquid outlet (221b), and the inner cavity of the second hollow body (222) cannot be communicated with the second accommodating cavity (211); when the sealing paste (24) is torn off and does not close the second through hole (213), the spring (23) pushes the valve core (22) to the highest point at the moment, so that the valve core (22) is in a liquid outlet state, namely, the inner cavity of the second hollow body (222) is communicated with the second accommodating cavity (211) through the second liquid inlet (222a), and the inner cavity of the first hollow body (221) cannot be communicated with the second accommodating cavity (211).

2. The sampling tube for detecting the new coronavirus according to claim 1, wherein the bottom of the cap body (21) is formed with a plug body (215) plugged into the opening of the tube body (1), a spring accommodating cavity (216) communicated with the first through hole (212) is formed in the plug body (215), a mesh plate (25) is arranged on the bottom surface of the spring accommodating cavity (216), and the mesh plate (25) is fixed on the bottom of the plug body (215);

the spring (23) is arranged in the spring accommodating cavity (216), the top of the spring (23) is abutted against the bottom surface of the first hollow body (221), and the bottom of the spring is abutted against the upper surface of the mesh plate (25).

3. The sampling tube for detecting the new coronavirus according to claim 1, wherein the first liquid inlet (221a) is opened on the end surface of the bottom of the first hollow body (221);

the number of the first liquid discharge ports (221b) is four, and the first liquid discharge ports are arranged around the top of the first hollow body (221);

the number of the second liquid inlets (222a) is also four, and the second liquid inlets are arranged around the bottom of the second hollow body (222);

the second liquid outlet (222b) is opened on the end surface of the top of the second hollow body (222).

4. The sampling tube for detecting the new coronavirus according to claim 1, wherein a first sealing ring (2a) is arranged in the first through hole (212) to seal a gap between the outer wall of the first hollow body (221) and the inner wall of the first through hole (212), and the first liquid inlet (221a) is always positioned below the first sealing ring (2a) in the moving process of the valve core (22);

a second sealing ring (2b) is arranged in the second through hole (213) and used for sealing a gap between the outer wall of the second hollow body (222) and the inner wall of the second through hole (213), and in the moving process of the valve core (22), the second liquid outlet (222b) is always positioned above the second sealing ring (2 b);

the inner wall of the bottom of the sleeve (214) is provided with a third sealing ring (2c), and the inner wall of the top is provided with a fourth sealing ring (2 d);

when the valve core (22) is in a liquid inlet state, the first liquid outlet (221b) is positioned between the first sealing ring (2a) and the third sealing ring (2c), and the second liquid inlet (222a) is positioned between the third sealing ring (2c) and the fourth sealing ring (2 d); when the valve core (22) is in a liquid outlet state, the first liquid outlet (221b) is positioned between the third sealing ring (2c) and the fourth sealing ring (2d), and the second liquid inlet (222a) is positioned between the second sealing ring (2b) and the fourth sealing ring (2 d).

5. The sampling tube for detecting the new coronavirus according to claim 1, wherein the top of the tube cap body (21) is provided with a sinking groove (217);

sealed subsides (24) include diaphragm (241) and fix baffle (242) as an organic whole with diaphragm (241), diaphragm (241) are pasted through the viscose on the top surface of tube cap main part (21), baffle (241) are gone into in sunken groove (217) and will second through-hole (213) seal, it is right the upward movement formation of case (22) blocks.

6. The sampling tube for detecting a new coronavirus according to claim 1, wherein the sleeve (214) is fixed on the inner wall of the second receiving cavity (211) by four support rods (218) arranged in a cross shape.

7. The sampling tube for detecting new coronavirus according to claim 1, wherein the top surface of the second containing cavity (211) is an inclined surface, and the inclination direction is gradually inclined upwards from the side far away from the second through hole (213) to the side near the second through hole (213).

8. The sampling tube for detecting new coronavirus according to claim 1, wherein the maximum capacity of the second accommodating cavity (211) is between 200ul and 300ul when the valve core (22) is in the liquid inlet state.

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