Lid of liquid sampling bottle, liquid sampling bottle, liquid sampling device and liquid injection gun

Abstract

The present disclosure relates to a cover of a liquid sampling bottle, a liquid sampling bottle, a liquid sampling device and a liquid injection gun. The cover includes a base having a liquid inlet and a liquid outlet, a valve body disposed on the base and capable of selectively opening and closing the liquid inlet, and a sealing cover detachably disposed on the base to open and close the liquid outlet. Wherein, the valve body includes a moving body and an anti-retreat structure. The moving body is provided with a liquid injection port capable of fluidly communicating with the liquid injection pipe of the liquid injection gun. The moving body can move along a first direction and has a first working position for closing the liquid inlet, a second working position where the liquid injection port communicates with the liquid inlet to open the liquid inlet, and a third working position for closing the liquid inlet, which are sequentially arranged along the first direction. The anti-retreat structure is used to prevent the moving body from moving along a second direction opposite to the first direction. In this way, after the sampling is completed, the moving body cannot return from the third working position to the second working position to inject liquid into the bottle, thereby avoiding the possibility of cheating during transportation.

Description

Technical Field

[0001] The present disclosure relates to the field of sewage sampling, and specifically, to a cap for a liquid sampling bottle, a liquid sampling bottle, a liquid sampling device, and a liquid injection gun. Background Art

[0002] Currently, the detection process of sewage includes sampling - transportation - laboratory testing. Specifically, it is necessary to first obtain a sewage sample by pouring sewage into a sampling bottle, and then transport the sewage sample from the sample collection point to a designated laboratory for analysis. There are already mature software solutions to monitor the entire process. For example, different two - dimensional codes are set on each sampling bottle to correspond to different ID numbers. Before the sampling device pours the sample into the sampling bottle, it can first scan the code of the sampling bottle to upload information such as the sampling bottle information, the sampling device number, the time and location to a designated network platform. After sampling, the sampling bottle is manually transported to the laboratory, and the laboratory personnel determine the sample information by scanning the code of the sampling bottle and test the sample to obtain the corresponding results.

[0003] However, in a process like this, if cheating is carried out on the sewage in the bottle during transportation, such as adding other impurities into the bottle, it will cause the test result to be inconsistent with the actual situation. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a cap for a liquid sampling bottle, a liquid sampling bottle, a liquid sampling device, and a liquid injection gun to prevent cheating on the sewage sample in the sampling bottle.

[0005] To achieve the above object, the present disclosure provides a cap for a liquid sampling bottle, including: a base having a liquid inlet and a liquid outlet, a valve body disposed on the base and capable of selectively opening and closing the liquid inlet, and a sealing cover detachably disposed on the base to open and close the liquid outlet. Wherein, the valve body includes a moving body, and a liquid injection port that can be in fluid communication with the liquid injection tube of the liquid injection gun is formed on the moving body. The moving body can move along a first direction and has a first working position, a second working position, and a third working position arranged in sequence along the first direction. Wherein, in the first working position, the moving body closes the liquid inlet; in the second working position, the liquid injection port is in communication with the liquid inlet to open the liquid inlet; in the third working position, the moving body closes the liquid inlet. And wherein, the valve body further includes a anti - retreat structure disposed on the base, and the anti - retreat structure is used to prevent the moving body from moving in a second direction opposite to the first direction at least in the first working position, the second working position, and the third working position.

[0006] Optionally, the moving body is configured as a columnar structure with its bottom end inserted into the base. The first direction is the direction of clockwise or counterclockwise rotation around the central axis of the columnar structure. A liquid injection channel for inserting the liquid injection pipe is provided on the top end surface of the moving body, and the liquid injection port is opened on the side wall of the moving body and communicated with the liquid injection channel.

[0007] Optionally, the valve body further includes a limiting ring sleeved outside the moving body and capable of elastic deformation in the radial direction. The limiting ring is locked to the base in the circumferential direction. The anti-retreat structure includes a pawl provided on the inner circumferential surface of the limiting ring and a ratchet tooth provided on the outer circumferential surface of the moving body. The ratchet tooth is formed with a first ratchet tooth groove, a second ratchet tooth groove, and a third ratchet tooth groove sequentially arranged on the outer circumferential surface of the moving body. Among them, at the first working position, the pawl is stuck in the first ratchet tooth groove. When the moving body rotates from the first working position to the second working position along the first direction, the pawl is stuck in the second ratchet tooth groove. When the moving body rotates from the second working position to the third working position along the first direction, the pawl is stuck in the third ratchet tooth groove.

[0008] Optionally, the moving body further has a fourth working position between the first working position and the second working position. When the moving body rotates to the fourth working position along the first direction, the liquid injection port and the liquid inlet start to be in fluid communication. The ratchet tooth is further formed with a fourth ratchet tooth groove located between the first ratchet tooth groove and the second ratchet tooth groove. The angular rotation of the first ratchet tooth groove and the fourth ratchet tooth groove in the circumferential direction is less than the angle of rotation of the moving body from the first working position to the fourth working position.

[0009] Optionally, a downward protrusion limiting portion is formed on the limiting ring, and a limiting groove for accommodating the limiting portion is formed on the base to perform circumferential limitation on the limiting ring.

[0010] Optionally, a sealing rubber strip is provided on the outer circumferential surface of the part of the moving body inserted into the base.

[0011] Optionally, the valve body further includes a gland sleeved outside the moving body and fixed on the base. The gland presses the moving body into the base from the top, and an opening for inserting the liquid injection pipe is provided at a position corresponding to the liquid injection channel on the gland.

[0012] Optionally, the liquid injection gun has a driving bump for radial protrusion, and a vertically extending guiding groove is formed on the gland. The guiding groove is used for sliding cooperation with the driving bump to guide the liquid injection pipe into the liquid injection channel; a first driving chute and a second driving chute that communicate with each other at the bottom end are formed on the outer peripheral surface of the moving body. The first driving chute extends obliquely from the top end surface to the bottom end surface of the moving body along the second direction, and the second driving chute extends obliquely from the bottom end of the first driving chute to the top end surface of the moving body along the second direction; wherein, at the first station, the driving bump is located at the top end of the guiding groove, the top end of the first driving chute is aligned with the top end of the guiding groove, when the driving bump moves downward along the guiding groove, it moves along the first driving chute to drive the moving body to rotate in the first direction to the second station; at the second station, the driving bump is located at the bottom end of the guiding groove, the bottom ends of the first driving chute and the second driving chute are aligned with the bottom end of the guiding groove, when the driving bump moves upward along the guiding groove, it moves along the second driving chute to drive the moving body to rotate in the first direction to the third station; at the third station, the driving bump is located at the top end of the guiding groove, and the top end of the second driving chute is aligned with the top end of the guiding groove.

[0013] Optionally, the first driving chute and the second driving chute are formed into a Y-shaped structure, and the vertical section of the Y-shaped structure is biased towards the second driving chute.

[0014] Optionally, the liquid injection gun has a limit hook, and a clamping groove for cooperating with the limit hook is formed on the outer peripheral surface of the gland, so that when the liquid injection pipe is inserted into the liquid injection channel and the moving body is located at the second station, the limit hook can be clamped in the clamping groove.

[0015] Optionally, the liquid injection gun includes a main body and a liquid injection pipe passing through the main body, so as to be clamped into the clamping groove when rotating towards the inner side of the main body and to release the clamping when rotating towards the outer side of the main body. An elastic member is arranged between the limit hook and the main body, and the elastic member is configured to provide an elastic force for the limit hook to rotate towards the inner side of the main body.

[0016] Optionally, a sewage discharge channel is further formed on the base, and the sewage discharge channel extends obliquely downward from the inside of the base to the outer surface of the base. The sewage discharge channel is configured as follows: when the moving body is located at the first station, the liquid injection port is communicated with the sewage discharge channel to discharge the liquid entering the liquid injection port through the sewage discharge channel.

[0017] Optionally, the sealing cap includes a plug cap and an anti-theft ring connected to each other, and the sealing cap is configured such that when the plug cap is opened to communicate the liquid outlet with the external liquid, the anti-theft ring is separated from the plug cap and locked on the base.

[0018] Optionally, the plug cap is provided with a ventilation hole, and a waterproof breathable membrane is disposed at a position corresponding to the ventilation hole on the inner side of the plug cap.

[0019] Based on the above technical solution, the present disclosure further provides a liquid sampling bottle, including a bottle body and the cap body in the above technical solution. An opening is provided on the bottle body, and the opening communicates with the liquid inlet and the liquid outlet.

[0020] Based on the above technical solution, the present disclosure further provides a liquid sampling device, including the liquid sampling bottle and a liquid injection gun in the above technical solution. The liquid injection gun can inject liquid into the bottle body through the cap body.

[0021] Based on the above technical solution, the present disclosure further provides a liquid injection gun, which is the liquid injection gun in the liquid sampling device in the above technical solution.

[0022] Through the above technical solution, the cap body of the liquid sampling bottle provided by the present disclosure can be fixedly connected to the opening of the bottle body through the base to inject a liquid sample into the bottle body through the cap body. Since the valve body installed on the base has a moving body capable of moving in a first direction, when sampling the liquid, the moving body can be moved from an initial first station in the first direction to a second station, so that the liquid sample can sequentially pass through the liquid injection port of the moving body and the liquid inlet of the base and enter the bottle body. Then, the moving body can be moved from the second station in the first direction to a third station, so that the moving body closes the liquid inlet of the base. Since a non-return structure is provided in the valve body, the moving body that moves to the third station after sampling cannot return to the second station again. That is to say, it is impossible to inject liquid into the sampling bottle again during the process of transporting the sampling bottle back to the laboratory after sampling, thereby avoiding the possibility of cheating during transportation. The liquid sampling bottle, the liquid sampling device, and the liquid injection gun provided by the present disclosure have the same technical effects as the cap body in the above technical solution. To avoid unnecessary repetition, they will not be elaborated here.

[0023] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0025] Figure 1It is a schematic structural diagram of the cover body of the liquid sampling bottle in the specific embodiment of the present disclosure;

[0026] Figure 2 It is a schematic structural diagram of the cover body without the assembled sealing cover in the specific embodiment of the present disclosure;

[0027] Figure 3 It is a schematic structural diagram of the valve body in the specific embodiment of the present disclosure;

[0028] Figure 4 It is a schematic structural diagram of the cooperation between the moving body and the limiting ring in the specific embodiment of the present disclosure;

[0029] Figure 5 It is Figure 4 a schematic structural diagram from another angle of

[0030] Figure 6 It is a schematic structural diagram of the assembly of the moving body and the base in the specific embodiment of the present disclosure;

[0031] Figure 7 It is a schematic structural diagram of the assembly of the moving body, the limiting ring and the base in the specific embodiment of the present disclosure;

[0032] Figure 8 It is a cross-sectional view of the moving body in the base at the first working position in the specific embodiment of the present disclosure;

[0033] Figure 9 It is a schematic structural diagram of the liquid injection gun in the specific embodiment of the present disclosure;

[0034] Figure 10 It is a cross-sectional view of the liquid injection gun in the specific embodiment of the present disclosure;

[0035] Figure 11 It is a schematic structural diagram of the cooperation between the liquid injection gun and the valve body when the moving body is at the first working position in the specific embodiment of the present disclosure;

[0036] Figure 12 It is a schematic structural diagram of the cooperation between the liquid injection gun and the columnar structure when the moving body is at the first working position in the specific embodiment of the present disclosure;

[0037] Figure 13 It is a schematic structural diagram of the liquid injection gun driving the moving body to reach the second working position in the specific embodiment of the present disclosure;

[0038] Figure 14 It is a schematic structural diagram of the liquid injection gun driving the moving body to rotate from the second working position to the third working position in the specific embodiment of the present disclosure;

[0039] Figure 15 It is a schematic structural diagram of the liquid injection gun driving the moving body to rotate to the third working position in the specific embodiment of the present disclosure;

[0040] Figure 16 This is a cross-sectional view of the moving body cooperating with the limiting ring when the moving body is at the first working position in the specific embodiment of the present disclosure. In the figure, the pawl is stuck in the first ratchet tooth groove;

[0041] Figure 17 This is a cross-sectional view of the sealing cover in the specific embodiment of the present disclosure;

[0042] Figure 18 This is a schematic structural view of the liquid sampling bottle in the specific embodiment of the present disclosure.

[0043] Explanation of reference numerals

[0044] 1 - Base, 11 - Liquid inlet, 12 - Liquid outlet, 13 - Limiting groove, 14 - Sewage discharge channel, 2 - Valve body, 20 - Moving body, 201 - Large diameter section, 202 - Small diameter section, 21 - Liquid injection port, 22 - Limiting ring, 221 - Limiting part, 222 - Pawl, 23 - Sealing rubber strip, 241 - First ratchet tooth groove, 242 - Second ratchet tooth groove, 243 - Third ratchet tooth groove, 244 - Fourth ratchet tooth groove, 25 - Liquid injection channel, 26 - Pressing cover, 261 - Guide groove, 262 - Card slot, 263 - Opening, 271 - First driving chute, 272 - Second driving chute, 3 - Sealing cover, 31 - Plug cover, 311 - Vent hole, 32 - Anti - theft ring, 33 - Waterproof and breathable membrane, 4 - Bottle body, 5 - Liquid injection gun, 50 - Main body, 51 - Liquid injection pipe, 52 - Driving convex block, 53 - Limiting hook, 54 - Rotating shaft, 55 - Elastic member. Specific embodiment

[0045] The following is a detailed description of the specific embodiment of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiment described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0046] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" refer to the inside and outside relative to the contour of the corresponding component itself. The terms such as "first", "second", etc. are used to distinguish one element from another, and do not have sequence and importance. In addition, in the following description with reference to the drawings, the same reference numerals in different drawings represent the same elements.

[0047] According to the specific embodiment of the present disclosure, a cover body for a liquid sampling bottle is provided. Referring to Figures 1 to 8 as shown, the cover body may include a base 1 having a liquid inlet 11 and a liquid outlet 12, a valve body 2 provided on the base 1 and capable of selectively opening and closing the liquid inlet 11, and a sealing cover 3 detachably provided on the base 1 to open and close the liquid outlet 12, wherein, referring to Figures 3 to 5As shown, the valve body 2 may include a moving body 20. A liquid injection port 21 that can be in fluid communication with the liquid injection pipe 51 of the liquid injection gun 5 is provided on the moving body 20. The moving body 20 can move in a first direction and has a first working position, a second working position, and a third working position arranged in sequence along the first direction. Among them, the first direction can be the direction of linear movement, the direction of curved movement, or the direction of rotation around a certain rotation axis. In the specific embodiments of the present disclosure, Figure 8 the direction of the arrow in represents the first direction. The line A represents the position of the center line of the liquid injection port 21 when the moving body 20 is in the first working position, the line B represents the position of the center line of the liquid injection port 21 when the moving body 20 is in the second working position, and the line C represents the position of the center line of the liquid injection port 21 when the moving body 20 is in the third working position. Among them, the first working position is the initial position of the moving body 20 when the cover body leaves the factory. Refer to Figure 8 As shown, in the first working position, the moving body 20 closes the liquid inlet 11, and the liquid injection port 21 is not in communication with the liquid inlet 11. In the second working position, the liquid injection port 21 is aligned with the liquid inlet 11 and in liquid communication to open the liquid inlet 11. In the third working position, the moving body 20 closes the liquid inlet 11, and the liquid injection port 21 is not in communication with the liquid inlet 11. And among them, the valve body 2 may further include a backstop structure provided on the base 1. The backstop structure is used to prevent the moving body 20 from moving in a second direction opposite to the first direction at least in the first working position, the second working position, and the third working position.

[0048] Through the above technical solution, the cover body of the liquid sampling bottle provided by the present disclosure can be fixedly connected to the opening of the bottle body 4 through the base 1 to inject a liquid sample into the bottle body 4 through the cover body. Since the valve body 2 installed on the base 1 has a moving body 20 that can move in the first direction, when sampling the liquid, the moving body 20 can be moved from the initial first working position to the second working position along the first direction, so that the liquid sample can sequentially pass through the liquid injection port 21 of the moving body 20 and the liquid inlet 11 of the base 1 and enter the bottle body 4. Then, the moving body 20 can be moved from the second working position to the third working position along the first direction, so that the moving body 20 closes the liquid inlet 11 of the base 1. Since a backstop structure is provided in the valve body 2, after sampling, the moving body 20 that moves to the third working position cannot return to the second working position again. That is to say, it is impossible to inject liquid into the sampling bottle again during the process of transporting the sampling bottle back to the laboratory, thus avoiding the possibility of cheating during transportation.

[0049] In order to reduce the volume of the cover body, refer to Figures 1 to 8As shown, the moving body 20 can be configured as a columnar structure with its bottom end inserted into the base 1. The first direction is the direction of clockwise or counterclockwise rotation around the central axis of the columnar structure. By rotating the moving body 20, the space utilization rate can be improved, thereby reducing the volume of the valve body 2. A liquid injection channel 25 into which the liquid injection pipe 51 can be inserted can be provided on the top end surface of the moving body 20. The liquid injection port 21 can be provided on the side wall of the moving body 20 and communicated with the liquid injection channel 25, so that when the moving body 20 rotates to the second working position, the liquid injection port 21 is aligned and communicated with the liquid inlet 11 provided inside the base 1. In addition, the columnar structure can include a small-diameter section 202 and a large-diameter section 201 that are connected to each other. Among them, the small-diameter section 202 is inserted into the base 1, and the shoulder formed between the large-diameter section 201 and the small-diameter section 202 abuts against the base 1. The liquid injection port 21 is provided on the outer peripheral surface of the small-diameter section 202, and the liquid injection channel 25 is provided on the top end surface of the large-diameter section 201.

[0050] Reference Figure 4 、 Figure 5 and Figure 7 As shown, the valve body 2 can further include a limiting ring 22 sleeved outside the moving body 20. The limiting ring 22 can elastically deform in the radial direction, and the limiting ring 22 is locked in the circumferential direction to the base 1 to prevent the limiting ring 22 from rotating together with the moving body 20; Reference Figure 16 As shown, the anti-back structure can include a pawl 222 provided on the inner peripheral surface of the limiting ring 22 and ratchet teeth provided on the outer peripheral surface of the moving body 20. The ratchet teeth can be formed with a first ratchet tooth groove 241, a second ratchet tooth groove 242, and a third ratchet tooth groove 243 that are sequentially provided on the outer peripheral surface of the moving body 20. Among them, in the first working position, the pawl 222 is locked in the first ratchet tooth groove 241. When the moving body 20 is as Figure 16When the moving body 20 rotates from the first station to the second station along the first direction as indicated by the direction of the arrow in the figure, the pawl 222 is locked in the second ratchet groove 242. When the moving body 20 rotates from the second station to the third station along the first direction, the pawl 222 is locked in the third ratchet groove 243. When the moving body 20 rotates along the first direction, the limiting ring 22 can undergo elastic deformation to facilitate the relative sliding between the pawl 222 and each ratchet groove. To make the cooperation between the moving body 20 and the limiting ring 22 stable and reliable, the pawl may include two radially opposite pawls 222 on the inner circumferential surface of the limiting ring 22. Correspondingly, the ratchets may include two radially opposite first ratchet grooves 241, two radially opposite second ratchet grooves 242, and two radially opposite third ratchet grooves 243 on the outer circumferential surface of the moving body 20. In addition, the limiting ring 22 may not be provided between the base 1 and the moving body 20, but rather a pawl that can only move radially along the moving body 20 to approach or move away from the moving body 20 may be directly provided on the base 1. Here, it should be noted that as long as the pawl can be circumferentially locked to the base 1, can move radially along the moving body 20, and can be locked in the corresponding ratchet groove on the moving body 20 at the corresponding station, the present disclosure does not limit the specific setting manner of the pawl.

[0051] To achieve relative circumferential fixation between the limiting ring 22 and the base 1, referring to Figure 4 and Figure 5 as shown, a downwardly protruding limiting portion 221 is formed on the limiting ring 22. Referring to Figure 6 and Figure 7 as shown, a limiting groove 13 for accommodating the limiting portion 221 is formed on the base 1. The limiting portion 221 is placed in the limiting groove 13 to prevent the limiting ring 22 from rotating together with the moving body 20, thereby achieving circumferential limitation of the limiting ring 22.

[0052] In addition, to enable the moving body 20 to rotate in the base 1, a clearance fit is provided between the small-diameter section 202 of the moving body 20 and the base 1. To ensure no fluid communication between the liquid injection port 21 and the liquid inlet 11 at the first station and the third station, referring to Figures 3 to 5 as shown, a sealing rubber strip 23 may be provided on the outer circumferential surface of the part of the moving body 20 inserted into the base 1, i.e., the small-diameter section 202, to seal the gap between the small-diameter section 202 and the base 1, thereby preventing fluid communication between the liquid injection port 21 and the liquid inlet 11 at the first station and the third station through the gap. Also, since the sealing rubber strip 23 can undergo elastic deformation, the sealing rubber strip 23 does not affect the rotation of the moving body 20 in the base 1 while providing sealing.

[0053] To avoid cheating by pre-filling the liquid into the sampling bottle before sampling, the moving body 20 may further have a fourth working position between the first working position and the second working position. When the moving body 20 rotates to the fourth working position along the first direction, the liquid injection port 21 and the liquid inlet 11 start to be in fluid communication. That is, the fourth working position is configured such that when the moving body 20 rotates from the first working position along the first direction, when the edge of the sealing rubber strip 23 near the liquid injection port 21 just crosses the edge of the liquid inlet 11, the liquid inlet 11 and the liquid injection port 21 can be in fluid communication through the gap between the small-diameter section 202 and the base 1; refer to Figure 16 As shown, the ratchet teeth may further form a fourth ratchet tooth groove 244 between the first ratchet tooth groove 241 and the second ratchet tooth groove 242. The angular rotation of the first ratchet tooth groove 241 and the fourth ratchet tooth groove 244 in the circumferential direction is less than the angle of rotation of the moving body 20 from the first working position to the fourth working position. That is to say, if one wants to fill the liquid into the sampling bottle before sampling to cheat, at least the moving body 20 needs to be rotated to the fourth working position. When the cheating is over and one wants to restore the moving body 20 to the first working position, the moving body 20 needs to be reversed along the second direction. When it is reversed to the position where the pawl 222 is stuck in the fourth ratchet tooth groove 244, the moving body 20 cannot continue to rotate along the second direction and thus cannot return to the first working position. When the staff conducts sampling, if it is found that the moving body 20 in the lid of a certain sampling bottle is not in the initial first working position at the time of leaving the factory, it can be realized that this sampling bottle has the risk of being cheated, and thus this sampling bottle can be invalidated to avoid inaccurate test results caused by sampling with a cheated sampling bottle.

[0054] To axially limit the moving body 20, refer to Figures 1 to 3 As shown, the valve body 2 may further include a gland 26 sleeved on the outside of the moving body 20 and fixed on the base 1. The gland 26 presses the moving body 20 into the base 1 from the top. An opening 263 for avoiding the liquid injection channel 2 was configured at the position of the gland 26 corresponding to the liquid injection channel 25, so that the liquid injection pipe 51 can pass through the opening 263 and be inserted into the liquid injection channel 25. Among them, the gland 26 can be adhesively fixed to the base 1.

[0055] To enable the moving body 20 to be driven by the liquid injection gun 5 to rotate, refer to Figure 9 and Figures 11 to 15 As shown, the liquid injection gun 5 may have a driving convex block 52 protruding radially. Refer to Figure 3 As shown, a vertically extending guide groove 261 may be formed on the gland 26. The guide groove 261 is used for sliding cooperation with the driving convex block 52 to guide the liquid injection pipe 51 to be inserted into the liquid injection channel 25; refer to Figures 4 to 6As shown, the outer circumferential surface of the large diameter section 201 of the moving body 20 may be provided with a first driving chute 271 and a second driving chute 272 connected at the bottom end, the first driving chute 271 extending obliquely from the top end surface of the large diameter section 201 to the shaft shoulder along the second direction, and the second driving chute 272 extending obliquely from the bottom end of the first driving chute 271 to the top end surface of the large diameter section 201 along the second direction; wherein, with reference to Figure 11 and Figure 12 As shown, in the first station, the driving protrusion 52 is located at the top of the guide groove 261, and the top of the first driving slide groove 271 is aligned with the top of the guide groove 261. When the driving protrusion 52 slides downward along the guide groove 261, it moves along the first driving slide groove 271 and drives the moving body 20 to rotate along the first direction to the second station. That is, the injection gun 5 can simultaneously drive the moving body 20 to rotate from the first station to the second station during the process of inserting the cover body; Figure 13 As shown, in the second station, the driving protrusion 52 is located at the bottom end of the guide groove 261, and the bottom ends of the first driving chute 271 and the second driving chute 272 are aligned with the bottom end of the guide groove 261. Figure 14 As shown, when the driving protrusion 52 moves upward along the guide groove 261, it moves along the second driving slide groove 272 and drives the moving body 20 to rotate along the first direction to the third position, referring to Figure 15 As shown, in the third station, the driving protrusion 52 is located at the top of the guide groove 261, and the top of the second driving chute 272 is aligned with the top of the guide groove 261, that is, after the injection gun 5 has finished injecting liquid into the sampling bottle, the injection gun 5 can simultaneously drive the moving body 20 to rotate from the second station to the third station during the process of being pulled out of the cover body. Through the above technical solution, the rotation of the moving body 20 can be driven by the insertion and removal of the injection gun 5, which can improve the sampling efficiency. In addition, if the sampling bottle is cheated before sampling and the moving body 20 of the cover body cannot return to the first station, then the top of the first driving chute 271 will be staggered with the top of the guide groove 261, making it impossible for the injection gun 5 to be inserted into the cover body and causing the sampling bottle to be unusable, which further improves the anti-cheating performance of the sampling bottle.

[0056] refer to Figure 5 and Figure 6 As shown, the first driving slot 271 and the second driving slot 272 can be constructed as a Y-shaped structure, and the vertical section of the Y-shaped structure can be biased toward the second driving slot 272 .

[0057] In order to avoid the rotation of the moving body 20 during the injection process of the injection gun 5, refer to Figure 3 、 Figure 9 and Figure 10As shown, the liquid injection gun 5 may have a limit hook 53, and a card slot 262 for cooperating with the limit hook 53 may be formed on the outer peripheral surface of the gland 26, so that when the liquid injection tube 51 is inserted into the liquid injection channel 25 and the moving body 20 is located at the second working position, the limit hook 53 can be clamped in the card slot 262, so that the liquid injection gun 5 is relatively fixed to the cover body, avoiding the rotation of the moving body 20 caused by the misoperation of the liquid injection gun 5 during the liquid injection process.

[0058] Reference Figure 9 and Figure 10 As shown, the liquid injection gun 5 may include a main body 50 and a liquid injection tube 51 passing through the main body 50. The liquid injection tube 51 may be inserted into the liquid injection channel 25 on the cover body to inject liquid into the bottle body 4 through the liquid injection port 21 of the cover body. Reference Figure 10 As shown, the limit hook 53 may be rotatably connected to the main body 50 through a rotating shaft 54, so as to be clamped into the card slot 262 when rotating towards the inner side of the main body 50, and the clamping fixation with the card slot 262 is released when rotating towards the outer side of the main body 50. An elastic member 55 may be provided between the limit hook 53 and the main body 50. The elastic member 55 is configured to be able to provide an elastic force for the limit hook 53 to rotate towards the inner side of the main body 50. During the process of the liquid injection gun 5 being inserted into the cover body and driving the moving body 20 to rotate from the first working position to the second working position, the limit hook 53 slides on the outer peripheral surface of the gland 26. When the moving body 20 rotates to the second working position, the limit hook 53 can be clamped tightly to the card slot 262 under the action of the elastic member 55. When the liquid injection of the liquid injection gun 5 is completed and needs to be pulled out, an external force can be applied to the limit hook 53, so that the limit hook 53 overcomes the elastic force of the elastic member 55 and separates from the card slot 262, so that the liquid injection gun 5 can be pulled out from the cover body.

[0059] To avoid cheating by pre-storing liquid in the liquid injection channel 25, reference Figure 6 and Figure 8 As shown, a sewage discharge channel 14 may also be opened on the base 1. The sewage discharge channel 14 extends obliquely downward from the inside of the base 1 to the outer surface of the base 1. The sewage discharge channel 14 may be configured such that when the moving body 20 is located at the first working position, the liquid injection port 21 is communicated with the sewage discharge channel 14 to discharge the liquid entering the liquid injection channel 25 through the liquid injection port 21 and the sewage discharge channel 14, avoiding the liquid for cheating remaining in the liquid injection channel 25.

[0060] To avoid cheating through the liquid outlet 12 of the base 1, reference Figure 1 and Figure 17As shown, the sealing cap 3 may include a plug cap 31 and an anti-theft ring 32 that are connected to each other. The sealing cap 3 may be configured such that when the plug cap 31 is opened to allow the liquid outlet 12 to communicate with the external liquid, the anti-theft ring 32 is separated from the plug cap 31 and locked to the base 1. After the sampling bottle is sampled and transported back to the laboratory, if the laboratory staff finds that the anti-theft ring 32 on a certain sampling bottle is separated from the plug cap 31, they can realize that the liquid outlet 12 of the sampling bottle has communicated with the external fluid. That is to say, before reaching the laboratory, there is a possibility that the sampling bottle has been tampered with through the liquid outlet 12.

[0061] In addition, for the convenience of injecting liquid into the bottle body 4, referring to Figure 1 and Figure 17 as shown, at least one ventilation hole 311 may be provided on the plug cap 31, and a waterproof and breathable membrane 33 may be provided at a position corresponding to the ventilation hole 311 on the inner side of the plug cap 31, so that the bottle body 4 can exhaust air through the waterproof and breathable membrane 33 and the ventilation hole 311, thereby facilitating the injection of liquid samples into the bottle body 4 through the liquid inlet 11.

[0062] Based on the above technical solutions, the present disclosure also provides a liquid sampling bottle. Referring to Figure 18 as shown, the liquid sampling bottle may include a bottle body 4 and the cap body in the above technical solution. The cap body may be adhesively fixed to the bottle body 4. An opening is provided on the bottle body 4, and the opening is in liquid communication with the liquid inlet 11 and the liquid outlet 12 of the base 1 of the cap body.

[0063] Through the above technical solutions, the liquid sampling bottle provided by the present disclosure has the same technical effects as the cap body in the above technical solutions. To avoid unnecessary repetition, it will not be elaborated here.

[0064] Based on the above technical solutions, the present disclosure also provides a liquid sampling device, including the liquid sampling bottle in the above technical solution and a liquid injection gun 5. The liquid injection gun 5 can inject liquid into the bottle body 4 through the cap body.

[0065] Through the above technical solutions, the liquid sampling device provided by the present disclosure has the same technical effects as the liquid sampling bottle in the above technical solutions. To avoid unnecessary repetition, it will not be elaborated here.

[0066] Based on the above technical solutions, the present disclosure also provides a liquid injection gun, which is the liquid injection gun 5 in the liquid sampling device in the above technical solution.

[0067] Through the above technical solutions, the liquid injection gun provided by the present disclosure has the same technical effects as the liquid sampling device in the above technical solutions. To avoid unnecessary repetition, it will not be elaborated here.

[0068] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0069] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0070] Furthermore, any combination can be made between the various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A lid for a liquid sampling bottle, characterized in that, Comprising: A base (1) having a liquid inlet (11) and a liquid outlet (12), a valve body (2) disposed on the base (1) and capable of selectively opening and closing the liquid inlet (11), and a sealing cover (3) detachably disposed on the base (1) to open and close the liquid outlet (12). Wherein, the valve body (2) includes a moving body (20), the moving body (20) is configured as a columnar structure with its bottom end inserted into the base (1), a liquid injection channel (25) for inserting the liquid injection tube (51) of the liquid injection gun (5) is provided on the top end surface of the moving body (20), a liquid injection port (21) capable of being in fluid communication with the liquid injection channel (25) is provided on the moving body (20), the moving body (20) can move in a first direction and has a first working position, a second working position and a third working position sequentially arranged along the first direction, the first direction is the direction of clockwise or counterclockwise rotation around the central axis of the columnar structure. Wherein, in the first working position, the moving body (20) closes the liquid inlet (11), in the second working position, the liquid injection port (21) is in communication with the liquid inlet (11) to open the liquid inlet (11), and in the third working position, the moving body (20) closes the liquid inlet (11). The valve body (2) further includes a gland (26) sleeved outside the moving body (20) and fixed on the base (1), and the gland (26) presses the moving body (20) into the base (1) from the top. The liquid injection gun (5) has a driving convex block (52) for radially protruding, and a guiding groove (261) extending vertically is formed on the gland (26), and the guiding groove (261) is used for sliding cooperation with the driving convex block (52) to guide the liquid injection tube (51) to insert into the liquid injection channel (25). A first driving chute (271) and a second driving chute (272) which are connected at the bottom end are provided on the outer peripheral surface of the moving body (20), the first driving chute (271) extends obliquely from the top end surface of the moving body (20) to the bottom end surface in a second direction opposite to the first direction, and the second driving chute (272) extends obliquely from the bottom end of the first driving chute (271) to the top end surface of the moving body (20) in the second direction. Wherein, in the first working position, the driving convex block (52) is located at the top end of the guiding groove (261), the top end of the first driving chute (271) is aligned with the top end of the guiding groove (261), and when the driving convex block (52) moves downward along the guiding groove (261), it moves along the first driving chute (271) to drive the moving body (20) to rotate in the first direction to the second working position. At the second station, the driving bump (52) is located at the bottom end of the guiding groove (261), the bottom ends of the first driving chute (271) and the second driving chute (272) are aligned with the bottom end of the guiding groove (261). When the driving bump (52) moves upward along the guiding groove (261), it moves along the second driving chute (272) to drive the moving body (20) to rotate in the first direction to the third station. At the third station, the driving bump (52) is located at the top end of the guiding groove (261), and the top end of the second driving chute (272) is aligned with the top end of the guiding groove (261). And wherein, the valve body (2) further includes a backstop structure provided on the base (1), and the backstop structure is used to prevent the moving body (20) from moving in the second direction at least at the first station, the second station and the third station.

2. The cover according to claim 1, characterized in that, The valve body (2) further includes a limiting ring (22) sleeved outside the moving body (20) and capable of elastically deforming radially, and the limiting ring (22) is circumferentially locked to the base (1). The backstop structure includes a pawl (222) provided on the inner circumferential surface of the limiting ring (22) and ratchet teeth provided on the outer circumferential surface of the moving body (20). The ratchet teeth are formed with a first ratchet tooth groove (241), a second ratchet tooth groove (242) and a third ratchet tooth groove (243) sequentially arranged on the outer circumferential surface of the moving body (20). Wherein, at the first station, the pawl (222) is locked in the first ratchet tooth groove (241). When the moving body (20) rotates from the first station to the second station in the first direction, the pawl (222) is locked in the second ratchet tooth groove (242). When the moving body (20) rotates from the second station to the third station in the first direction, the pawl (222) is locked in the third ratchet tooth groove (243).

3. The cover according to claim 2, characterized in that, The moving body (20) further has a fourth station between the first station and the second station. When the moving body (20) rotates to the fourth station in the first direction, the liquid injection port (21) and the liquid inlet port (11) start to be in fluid communication. The ratchet teeth are further formed with a fourth ratchet tooth groove (244) between the first ratchet tooth groove (241) and the second ratchet tooth groove (242), and the angular rotation of the first ratchet tooth groove (241) and the fourth ratchet tooth groove (244) in the circumferential direction is less than the angle of rotation of the moving body (20) from the first station to the fourth station.

4. The cover according to claim 2, characterized in that, The limiting ring (22) is formed with a downward protruding limiting portion (221), and the base (1) is formed with a limiting groove (13) for accommodating the limiting portion (221) to circumferentially limit the limiting ring (22).

5. The cover according to claim 1, characterized in that, A sealing strip (23) is provided on the outer circumferential surface of the part of the moving body (20) inserted into the base (1).

6. The cover according to any one of claims 1-5, characterized in that, An opening (263) for inserting the liquid injection tube (51) is provided at a position of the gland (26) corresponding to the liquid injection channel (25).

7. The cover according to claim 1, characterized in that, The first driving chute (271) and the second driving chute (272) are formed into a Y-shaped structure, and the vertical section of the Y-shaped structure is biased towards the second driving chute (272).

8. The cover according to claim 1, characterized in that, The liquid injection gun (5) has a limit hook (53), and a clamping groove (262) for cooperating with the limit hook (53) is formed on the outer peripheral surface of the gland (26), so that when the liquid injection tube (51) is inserted into the liquid injection channel (25) and the moving body (20) is located at the second working position, the limit hook (53) can be clamped in the clamping groove (262).

9. The cover according to claim 8, characterized in that, The liquid injection gun (5) includes a main body (50) and a liquid injection tube (51) penetrating through the main body (50). The limit hook (53) is rotatably connected to the main body (50) through a rotating shaft (54) to be clamped into the clamping groove (262) when rotating towards the inner side of the main body (50), and the clamping is released when rotating towards the outer side of the main body (50). An elastic member (55) is arranged between the limit hook (53) and the main body (50), and the elastic member (55) is configured to be able to provide an elastic force for the limit hook (53) to rotate towards the inner side of the main body (50).

10. The cover according to claim 1, characterized in that, A sewage discharge channel (14) is further opened on the base (1). The sewage discharge channel (14) extends obliquely downward from the inside of the base (1) to the outer surface of the base (1). The sewage discharge channel (14) is configured such that when the moving body (20) is located at the first working position, the liquid injection port (21) is communicated with the sewage discharge channel (14) to discharge the liquid entering the liquid injection port ( 11. The cover according to claim 1, characterized in that, ​ 12. The cover according to claim 11, characterized in that, ​ 13. A liquid sampling bottle, characterized in that, ​ 14. A liquid sampling device, characterized in that, ​

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