Liquid sampling and storing device

Abstract

The utility model provides a liquid sampling and storing device. The liquid sampling and storing device comprises a sampling tube and a sample storing tube, the liquid inlet end of the sampling pipe is provided with an upper one-way valve; the liquid inlet end of the sample storage pipe is provided with a lower one-way valve; the upper one-way valve comprises an upper valve body fixedly connected with the sampling pipe, an upper valve seat fixedly connected with the upper valve body and a sealing ball arranged in the upper valve seat; the lower one-way valve comprises a lower one-way valve seat, a lower valve element arranged in the lower one-way valve seat and a spring blocking seat arranged on the top of the lower valve element. The outer diameter of the spring blocking seat is matched with that of the upper valve seat, and the inner diameter of the upper end of the lower valve element is smaller than that of the liquid inlet through hole of the upper valve seat. The lower valve element is in sliding fit with the lower one-way valve seat. The outer edge of the spring blocking seat is connected with the lower one-way valve seat through a first elastic piece. The spring baffle seat is in sliding fit with the top of the lower valve core; the inner edge of the spring blocking seat is connected with the lower valve element through a second elastic piece. The liquid sampling and storing device is simple in structure, reasonable in design and suitable for detection and sampling of various water bodies.

Description

Technical Field

[0001] The utility model relates to the field of water body detection, and specifically, to a liquid sampling and storage device. Background Art

[0002] With the increasing attention of people to environmental protection, the application of water quality monitoring devices has become more and more common. In order to facilitate the detection of water quality, people have developed a variety of water sampling devices. For example, the portable groundwater and surface water depth sampling device disclosed in Chinese Patent CN221148154U includes a sampling bucket, the lower end of the sampling bucket is connected with a water inlet end, a blocking ball is arranged at the water inlet end of the sampling bucket, and the blocking ball forms a seal for the small-diameter orifice at the bottom end of the water inlet end in its natural state. When sampling, the blocking ball is pushed up under the action of water pressure, and the water sample can enter the sampling bucket through the water inlet end. However, the sealing method of the blocking ball at the water inlet end is unstable and is prone to leakage during movement.

[0003] In order to solve the above existing problems, people have been seeking an ideal technical solution. Content of the Utility Model

[0004] The purpose of the utility model is to aim at the deficiencies of the prior art, and thus provide a liquid sampling and storage device.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A liquid sampling and storage device includes a sampling tube and a storage tube; an upper one-way valve is arranged at the liquid inlet end of the sampling tube, and a lower one-way valve is arranged at the liquid inlet end of the storage tube; the upper one-way valve includes an upper valve body fixedly connected with the sampling tube, an upper valve seat fixedly connected with the upper valve body, and a sealing ball arranged in the upper valve seat; the lower one-way valve includes a lower one-way valve seat, a lower valve core arranged inside the lower one-way valve seat, and a spring retaining seat arranged at the top of the lower valve core; the outer diameter of the spring retaining seat is adapted to the outer diameter of the upper valve seat, and the inner diameter of the upper end of the lower valve core is smaller than the liquid inlet through hole of the upper valve seat; the lower valve core is slidably matched with the lower one-way valve seat, and the outer edge of the spring retaining seat is connected with the lower one-way valve seat through a first elastic member; the spring retaining seat is slidably matched with the top of the lower valve core; the inner edge of the spring retaining seat is connected with the lower valve core through a second elastic member; in the natural state, the spring retaining seat is pushed upward, and the lower valve core seals the liquid inlet end of the storage tube.

[0007] A liquid inlet through hole is opened at the centers of the upper valve body and the upper valve seat, and the liquid inlet through hole is coaxial with the sampling tube; the outer diameter of the sealing ball is larger than the liquid inlet through hole of the upper valve body; the liquid inlet through hole of the upper valve seat is a tapered hole, the sealing ball is located inside the tapered hole, and the outer diameter of the sealing ball is larger than the constricted end of the tapered hole and smaller than the expanded end of the tapered hole.

[0008] A transition sleeve is arranged at the liquid inlet end of the storage tube, and the lower end of the lower one-way valve seat extends into the transition sleeve and is fixedly connected with the transition sleeve.

[0009] The lower one-way valve seat is integrally of a cylindrical structure. A support plate is arranged inside the cylindrical structure, and a guide sleeve is arranged at the center of the support plate; the lower valve core passes through the guide sleeve and is in sliding fit with the guide sleeve, and a number of through holes are evenly arranged on the support plate.

[0010] One end of the cylindrical structure located inside the transition sleeve is provided with a reduced diameter; a number of vent holes are arranged on the side wall of the cylindrical structure, and the vent holes communicate with the inside of the external reduced diameter.

[0011] The lower valve core includes a first guide post, a second guide post arranged at the upper end of the first guide post, and a sealing baffle arranged at the lower end of the first guide post. The sealing baffle is located below the reduced diameter and its outer diameter is larger than the inner diameter of the reduced diameter; a sealing gasket is arranged on the upper side of the sealing baffle; the first guide post is in sliding fit with the guide sleeve; the second guide post is in sliding fit with the spring retainer.

[0012] The spring retainer is of a cylindrical structure, and a support plate is arranged inside the cylindrical structure; a guide hole is arranged at the center of the support plate, and the upper end of the second guide post passes through the guide hole; a number of liquid leakage holes are evenly arranged on the support plate.

[0013] Limit nuts are respectively arranged at the upper ends of the first guide post and the second guide post corresponding to the guide hole and the guide sleeve.

[0014] A number of notches are evenly arranged on the upper end face of the spring retainer.

[0015] Two groups of annular plugs are respectively arranged at the middle part and the position near the sealing end of the sampling tube, and a magnetic ring is arranged between the two groups of annular plugs.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows. The present utility model provides a liquid sampling and storage device. During use, first sample through the sampling tube, and then dock and press the upper one-way valve of the sampling tube and the lower one-way valve of the storage tube, so that the upper one-way valve of the sampling tube and the lower one-way valve of the storage tube are opened, and the liquid in the sampling tube enters the storage tube. Then remove the sampling tube. Under the elastic force of the first elastic member and the second elastic member, the lower one-way valve of the storage tube closes, which is convenient for subsequent sample transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model.

[0018] Figure 2 is a schematic structural diagram of the combination of the upper one-way valve and the lower one-way valve of the present utility model before liquid discharge.

[0019] Figure 3 is a schematic structural diagram of the combination of the upper one-way valve and the lower one-way valve of the present utility model during the liquid discharge process.

[0020] Figure 4It is a schematic structural diagram of the lower spool in the present utility model.

[0021] Figure 5 It is a schematic structural diagram of the lower one-way valve seat in the present utility model.

[0022] Figure 6 It is a schematic top view structural diagram of the lower one-way valve seat in the present utility model.

[0023] Figure 7 It is a schematic structural diagram of the spring retainer in the present utility model.

[0024] In the figure: 1. Sampling tube; 2. Sample storage tube; 3. Sealed end; 4. Magnetic ring; 5. Transition sleeve; 6. Upper one-way valve; 61. Upper valve body; 62. Upper valve seat; 63. Sealing ball; 7. Lower one-way valve; 71. Lower one-way valve seat; 711 Guide sleeve; 712 Vent hole; 713 Reduced opening; 72. Lower spool; 721 First guide post; 722 Second guide post; 723 Limit nut; 73. Spring retainer; 731 Guide hole; 732 Notch; 74. First elastic member; 75. Second elastic member; 76. Sealing baffle; 77. Sealing gasket. Detailed implementation manners

[0025] The following will further describe the technical solutions of the present utility model in detail through specific implementation manners.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. "Installation", "provided with", "connection", etc. can adopt conventional means in the prior art, such as: integrally arranged, snap-mounted, welded connection, bonded connection, bolt connection, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations, and suitable connection, setting or installation methods can be selected in the prior art.

[0027] Such as Figures 1-7As shown in the figure, a liquid sampling and sample storage device includes a sampling tube 1 and a sample storage tube 2; a check valve is provided at the liquid inlet end of the sampling tube 1, and a check valve 7 is provided at the liquid inlet end of the sample storage tube 2; the check valve includes an upper valve body 61 fixedly connected to the sampling tube 1, an upper valve seat 62 fixedly connected to the upper valve body, and a sealing ball 63 disposed within the upper valve seat 62; the check valve 7 includes a lower check valve seat 71, a lower valve core 72 disposed within the lower check valve seat 71, and a spring retaining seat 73 disposed at the top of the lower valve core 72; the outer diameter of the spring retaining seat 73 is adapted to the outer diameter of the upper valve seat 62, and the inner diameter of the upper end of the lower valve core 72 is smaller than the liquid inlet through hole of the upper valve seat 62; the lower valve core 72 is slidably engaged with the lower check valve seat 71, and the outer edge of the spring retaining seat 73 is connected to the lower check valve seat 71 through a first elastic member 74; the spring retaining seat 73 is slidably engaged with the top of the lower valve core 72; the inner edge of the spring retaining seat 73 is connected to the lower valve core 72 through a second elastic member 75; in the natural state, the spring retaining seat 73 is pushed upward, and the lower valve core 72 seals the liquid inlet end of the sample storage tube 2.

[0028] Specifically, the first elastic member and the second elastic member can be springs. Preferably, the contact surface between the check valve of the sampling tube and the check valve of the liquid storage tube is designed with a spherical contact, allowing the sampling tube to be tilted by 15 degrees to complete docking, reducing the docking difficulty between the sampling tube and the liquid storage tube.

[0029] During use, first sample through the sampling tube, and then press and dock the check valve of the sampling tube and the check valve of the sample storage tube, so that the check valve of the sampling tube and the check valve of the sample storage tube are opened, and the liquid in the sampling tube enters the sample storage tube. Then, remove the sampling tube. Under the elastic force of the first elastic member and the second elastic member, the check valve of the sample storage tube closes, facilitating subsequent sample transfer.

[0030] In one embodiment, a liquid inlet through hole is provided at the centers of the upper valve body 61 and the upper valve seat 62, and the liquid inlet through hole is coaxial with the sampling tube 1; the outer diameter of the sealing ball 63 is larger than the liquid inlet through hole of the upper valve body 61; the liquid inlet through hole of the upper valve seat 62 is a tapered hole, and the sealing ball 63 is located inside the tapered hole. The outer diameter of the sealing ball 63 is larger than the reduced end 713 of the tapered hole and smaller than the enlarged end of the tapered hole, facilitating the sealing ball to retain a small amount of displacement space and be able to move up or down under the action of buoyancy or gravity.

[0031] In one embodiment, a transition sleeve 5 is provided at the liquid inlet end of the sample storage tube 2, and the lower end of the lower check valve seat 71 extends into the transition sleeve 5 and is fixedly connected to the transition sleeve 5, facilitating assembly.

[0032] In one embodiment, the lower check valve seat 71 is a cylindrical structure as a whole, and a support plate is provided inside the cylindrical structure. A guide sleeve 711 is provided at the center of the support plate; the lower valve core 72 passes through the guide sleeve 711 and is slidably engaged with the guide sleeve 711. A number of through holes are evenly provided on the support plate to facilitate the passage of liquid.

[0033] In one embodiment, a reduced diameter opening 713 is provided at one end of the cylindrical structure located inside the transition sleeve 5; a plurality of ventilation holes 712 are formed in the side wall of the cylindrical structure, and the ventilation holes 712 communicate with the inside of the external reduced diameter opening 713 to facilitate exhaust.

[0034] In one embodiment, the lower valve core 72 includes a first guide post 721, a second guide post 722 provided at the upper end of the first guide post 721, and a sealing baffle 76 provided at the lower end of the first guide post 721. The sealing baffle 76 is located below the reduced diameter opening 713 and has an outer diameter larger than the inner diameter of the reduced diameter opening 713; a sealing gasket 77 is provided on the upper side of the sealing baffle 76, and a rubber gasket can be used; the first guide post 721 is slidably engaged with the guide sleeve 711; the second guide post 722 is slidably engaged with the spring retainer 73.

[0035] In one embodiment, the spring retainer 73 is of a cylindrical structure, and a support plate is provided inside the cylindrical structure; a guide hole 731 is formed in the center of the support plate, and the upper end of the second guide post 722 passes through the guide hole 731; a plurality of liquid leakage holes are uniformly formed in the support plate to facilitate the passage of liquid.

[0036] In one embodiment, limit nuts 723 are respectively provided at the upper ends of the first guide post 721 and the second guide post 722 corresponding to the guide hole 731 and the guide sleeve 711 to prevent slipping off.

[0037] In one embodiment, a plurality of notches 732 are uniformly provided on the upper end surface of the spring retainer 73.

[0038] In one embodiment, two sets of annular plugs are respectively provided at the middle part and the position near the sealing end 3 of the sampling tube 1, and a magnetic ring 4 is provided between the two sets of annular plugs to facilitate cooperation with a signal acquisition module provided in the control device to realize the position control of the sampling tube. The control device adopts the prior art, and the signal acquisition module mainly includes an end effector, a Hall sensor, a position signal module, etc.

[0039] The above embodiments can be combined with each other.

[0040] The working principle of the present utility model is as follows:

[0041] When taking liquid, insert the sampling tube into the liquid. The buoyancy of the liquid pushes the sealing ball upward, and the liquid enters the sampling tube. After taking the liquid, lift the sampling tube. The sealing ball is tightly attached to the lower end of the upper valve seat of the upper one-way valve body under its own gravity and water pressure to temporarily store the liquid inside the sampling tube, and the liquid taking is completed.

[0042] When draining the liquid, press the one-way valve on the sampling tube to push the spring baffle of the liquid storage tube, compress the first elastic member, and the lower valve core moves downward. At the same time, the liquid discharge and exhaust channels are opened. After the lower valve core moves to the limit position, the liquid sampling tube continues to move downward to push the spring baffle, compress the second elastic member, and the upper end of the lower valve core pushes open the sealing ball of the upper one-way valve. The liquid enters the liquid storage tube through the water inlet channel in the middle of the upper one-way valve body, and the air in the liquid storage tube is discharged through the exhaust channel. After the liquid discharge is completed, the sampling tube moves upward, the first elastic member and the second elastic member rebound, the lower valve core is pulled back to its original position by the spring, and the sealing gasket of the lower valve core contacts and seals with the lower one-way valve seat to seal the liquid in the liquid storage tube, completing the temporary storage of the liquid sample. In the whole process, the one-way valve of the liquid storage tube is opened first, and then the upper one-way valve of the sampling tube is opened to prevent the liquid in the sampling tube from overflowing during liquid discharge. The butt joint surface between the lower one-way valve body and the upper one-way valve body is designed with spherical contact, allowing the sampling tube to be tilted by 15 degrees to complete the butt joint, reducing the difficulty of butt joint of the sampling tube. When it is necessary to drain the liquid in the test tube, use a tool to push the lower valve core or remove the test tube to drain the liquid.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still modifications can be made to the specific embodiments of the present invention or equivalent replacements can be made to some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A liquid sampling and storage device, characterized in that: It includes a sampling tube and a sample storage tube; a check valve is provided at the liquid inlet end of the sampling tube, and a check valve is provided at the liquid inlet end of the sample storage tube; the check valve includes an upper valve body fixedly connected to the sampling tube, an upper valve seat fixedly connected to the upper valve body, and a sealing ball disposed within the upper valve seat; the check valve includes a lower check valve seat, a lower valve core disposed within the lower check valve seat, and a spring retainer disposed at the top of the lower valve core; the outer diameter of the spring retainer is adapted to the outer diameter of the upper valve seat, and the inner diameter of the upper end of the lower valve core is smaller than the liquid inlet through hole of the upper valve seat; the lower valve core is slidably engaged with the lower check valve seat, and the outer edge of the spring retainer is connected to the lower check valve seat through a first elastic member; the spring retainer is slidably engaged with the top of the lower valve core; the inner edge of the spring retainer is connected to the lower valve core through a second elastic member; in the natural state, the spring retainer is pushed upward, and the lower valve core seals the liquid inlet end of the sample storage tube.

2. The liquid sampling and storage device according to claim 1, wherein: A liquid inlet through hole is provided at the center of the upper valve body and the upper valve seat, and the liquid inlet through hole is coaxial with the sampling tube; the outer diameter of the sealing ball is larger than the liquid inlet through hole of the upper valve body; the liquid inlet through hole of the upper valve seat is a tapered hole, the sealing ball is located inside the tapered hole, and the outer diameter of the sealing ball is larger than the constricted end of the tapered hole and smaller than the flared end of the tapered hole.

3. The liquid sampling and storage device according to claim 2, wherein: A transition sleeve is provided at the liquid inlet end of the sample storage tube, and the lower end of the lower check valve seat extends into the transition sleeve and is fixedly connected to the transition sleeve.

4. The liquid sampling and storage device according to claim 3, characterized in that: The lower check valve seat is a cylindrical structure as a whole, a support plate is provided inside the cylindrical structure, and a guide sleeve is provided at the center of the support plate; the lower valve core passes through the guide sleeve and is slidably engaged with the guide sleeve, and a plurality of through holes are uniformly provided on the support plate.

5. The liquid sampling and storage device according to claim 4, characterized in that: A constriction is provided at one end of the cylindrical structure located inside the transition sleeve; a plurality of ventilation holes are provided on the side wall of the cylindrical structure, and the ventilation holes communicate with the inside of the external constriction.

6. The liquid sampling and sample storage device according to claim 5, wherein: The lower valve core includes a first guide post, a second guide post provided at the upper end of the first guide post, and a sealing baffle provided at the lower end of the first guide post, the sealing baffle is located below the constriction and the outer diameter is larger than the inner diameter of the constriction; a sealing gasket is provided on the upper side of the sealing baffle; the first guide post is slidably engaged with the guide sleeve; the second guide post is slidably engaged with the spring retainer.

7. The liquid sampling and storage device according to claim 6, wherein: The spring retainer is a cylindrical structure as a whole, a support plate is provided inside the cylindrical structure; a guide hole is provided at the center of the support plate, and the upper end of the second guide post passes through the guide hole; a plurality of liquid leakage holes are uniformly provided on the support plate.

8. The liquid sampling and sample storage device according to claim 7, characterized in that: Limit nuts are respectively provided at the upper ends of the first guide post and the second guide post corresponding to the guide hole and the guide sleeve.

9. The liquid sampling and storage device according to claim 8, characterized in that: A plurality of notches are uniformly provided on the upper end surface of the spring retainer.

10. The liquid sampling and storage device according to claim 9, characterized in that: The sealing end of the sampling tube is a conical head, and two groups of annular plugs are respectively provided at the middle and the position near the sealing end of the sampling tube, and a magnetic ring is provided between the two groups of annular plugs.

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