Liquid detection sampling device

Abstract

This utility model discloses a liquid detection and sampling device, including a cylindrical body. A sealing plug is installed inside the cylindrical body, and a push rod is fixedly connected to the bottom of the sealing plug. A cylindrical head is installed at the upper end of the cylindrical body, and the cylindrical head is rotatably connected to the cylindrical body. An injection needle is fixedly connected to the upper end of the cylindrical head, and a communication hole communicating with the injection needle is opened at the bottom of the cylindrical head. A liquid inlet communicating with the interior of the cylindrical body is opened at the upper end of the cylindrical body. This utility model, through its rotatable structure between the cylindrical head and the cylindrical body, allows for normal sampling by rotating the cylindrical head during sampling to ensure communication between the cylindrical head and the cylindrical body. After sampling, the cylindrical head is rotated again to cover the liquid inlet at the upper end of the cylindrical body with its bottom, thus preventing the evaporation of formaldehyde from the liquid inside the cylindrical body. This makes the entire sampling process more convenient. The rotating cylindrical head can be fixed by a connecting plate and a limiting mechanism.

Description

Technical Field

[0001] This utility model relates to the field of formaldehyde sampling technology, specifically a liquid detection and sampling device. Background Technology

[0002] Formaldehyde solution usually refers to an aqueous solution containing formaldehyde, commonly known as formalin. It generally refers to a 35% to 40% formaldehyde aqueous solution, which has a pungent odor. It is a colorless liquid that is volatile and miscible with water, ethanol, etc. It may become cloudy or precipitate after long-term storage.

[0003] Formaldehyde solution requires sampling to determine its concentration. When small samples are needed (e.g., for small testing volumes) or from containers with small openings, syringe sampling is more flexible. However, when using a syringe, the needle must be quickly withdrawn after sampling, and the syringe outlet immediately sealed with a rubber stopper or sealing film to prevent formaldehyde evaporation, which increases the difficulty of sampling. Therefore, a liquid detection sampling device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a liquid detection and sampling device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a liquid detection and sampling device, comprising a cylindrical body, a sealing plug disposed inside the cylindrical body, a push rod fixedly connected to the bottom of the sealing plug, a cylindrical head disposed at the upper end of the cylindrical body, a rubber layer disposed at the bottom of the cylindrical head, the cylindrical head being rotatably connected to the cylindrical body, an injection needle fixedly connected to the upper end of the cylindrical head, a communicating hole communicating with the injection needle being opened at the bottom of the cylindrical head, a liquid inlet communicating with the interior of the cylindrical body being opened at the upper end of the cylindrical body, the size of the liquid inlet being the same as the size of the communicating hole, connecting plates being fixedly connected to the mutually symmetrical sides of the cylindrical head, and a limit mechanism being disposed at the other end of the connecting plate.

[0006] As a further preferred embodiment of this technical solution, the limiting mechanism consists of an annular guide rail, locking blocks, and sliders. An annular guide rail is fixedly sleeved on the outer wall of the cylinder. Two locking blocks are provided on the annular guide rail, and the two locking blocks are symmetrically distributed on both sides of the annular guide rail. The locking blocks are connected to the annular guide rail through an elastic telescopic mechanism. Sliders are fixedly connected to the bottom of the side walls of the two connecting plates that are close to each other. The sliders slide and fit with the annular guide rail. Grooves are provided on the side walls of the two sliders that are close to each other, and the grooves are adapted to the locking blocks.

[0007] As a further preferred embodiment of this technical solution, the elastic telescopic mechanism consists of a movable block and a spring. The movable block is fixedly installed on the side of the locking block near the annular guide rail. The movable block is slidably installed in the movable groove opened inside the annular guide rail. A spring is fixedly connected between the side wall of the movable block and the inner wall of the movable groove.

[0008] As a further preferred embodiment of this technical solution, the protruding end of the card block has a hemispherical structure.

[0009] As a further preferred embodiment of this technical solution, an annular sealing plate is fixedly connected to the bottom edge of the cylinder head, and an annular sealing groove is provided at the upper edge of the cylinder body, with the annular sealing plate and the annular sealing groove being mutually compatible.

[0010] As a further preferred embodiment of this technical solution, handles are fixedly connected to both sides of the bottom of the cylinder.

[0011] As a further preferred embodiment of this technical solution, a pointer mark is provided at the bottom of the side wall of one of the connecting plates, and a connection mark is provided at the top of one of the handles.

[0012] As a further preferred embodiment of this technical solution, the outer wall of the cylinder is provided with observation scale.

[0013] This utility model provides a liquid detection and sampling device, which has the following beneficial effects:

[0014] This invention features a rotatable structure between the head and body of the cylinder. During sampling, rotating the head connects the head and body to ensure proper sampling. After sampling, rotating the head again blocks the liquid inlet at the top of the body, preventing the evaporation of formaldehyde from the liquid inside the cylinder. This makes the entire sampling process more convenient. The rotating head can be fixed in place by a connecting plate and a limiting mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a breakdown diagram of the overall structure of this utility model;

[0017] Figure 3 In this utility model Figure 1 Partial structural diagram;

[0018] Figure 4 This is a schematic diagram of the structure of the middle tube head of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the middle cylinder of this utility model;

[0020] Figure 6 This is a schematic diagram of the elastic telescopic mechanism in this utility model;

[0021] In the diagram: 1. Cylinder body; 2. Push rod; 3. Cylinder head; 4. Injection needle; 5. Handle; 6. Observation scale; 7. Connecting plate; 8. Annular guide rail; 9. Sealing plug; 10. Locking block; 11. Sliding block; 12. Groove; 13. Pointer indicator; 14. Connecting indicator; 15. Liquid inlet; 16. Connecting hole; 17. Annular sealing plate; 18. Annular sealing groove; 19. Movable block; 20. Movable groove; 21. Spring. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] This utility model provides a technical solution: such as Figures 1 to 6 As shown, in this embodiment, a liquid detection and sampling device includes a cylinder 1, a sealing plug 9 is provided inside the cylinder 1, a push rod 2 is fixedly connected to the bottom of the sealing plug 9, a cylinder head 3 is provided at the upper end of the cylinder 1, a rubber layer is provided at the bottom of the cylinder head 3, the cylinder head 3 is rotatably connected to the cylinder 1, an injection needle 4 is fixedly connected to the upper end of the cylinder head 3, a connecting hole 16 communicating with the injection needle 4 is provided at the bottom of the cylinder head 3, a liquid inlet 15 communicating with the inside of the cylinder 1 is provided at the upper end of the cylinder 1, the size of the liquid inlet 15 is the same as the size of the connecting hole 16, connecting plates 7 are fixedly connected to the mutually symmetrical sides of the cylinder head 3, and a limit mechanism is provided at the other end of the connecting plate 7.

[0024] In use, rotating the connecting plate 7 drives the cylinder head 3 to rotate. When the liquid inlet 15 is aligned with the connecting hole 16, the device can extract the sample from the liquid formaldehyde bottle according to the normal use of an injection molding machine. After the sample is extracted, rotating the connecting plate 7 drives the cylinder head 3 to rotate, causing the liquid inlet 15 to separate from the connecting hole 16. At this time, the bottom of the cylinder head 3 can cover the liquid inlet 15 at the top of the cylinder 1, thereby preventing the liquid formaldehyde inside the cylinder 1 from evaporating.

[0025] The limiting mechanism consists of an annular guide rail 8, a locking block 10, and a slider 11. An annular guide rail 8 is fixedly sleeved on the outer wall of the cylinder 1. Two locking blocks 10 are provided on the annular guide rail 8. The two locking blocks 10 are symmetrically distributed on both sides of the annular guide rail 8. The locking blocks 10 and the annular guide rail 8 are connected by an elastic telescopic mechanism. Slider 11 is fixedly connected to the bottom of the side walls of the two connecting plates 7 that are close to each other. The slider 11 slides and fits with the annular guide rail 8. Grooves 12 are provided on the side walls of the two sliders 11 that are close to each other. The grooves 12 are adapted to the locking blocks 10.

[0026] The elastic telescopic mechanism consists of a movable block 19 and a spring 21. The movable block 19 is fixedly installed on the side of the locking block 10 near the annular guide rail 8. The movable block 19 is slidably installed in the movable groove 20 opened inside the annular guide rail 8. The spring 21 is fixedly connected between the side wall of the movable block 19 and the inner wall of the movable groove 20.

[0027] The locking block 10 can be extended out of the movable slot 20 by the compression of the spring 21.

[0028] The protruding end of the card block 10 is a hemispherical structure.

[0029] With this configuration, when the user manually rotates the connecting plate 7, the protruding end of the locking block 10 is a hemispherical structure. The locking block 10 will automatically retract under greater pressure, thus ensuring that the user can rotate the cylinder head 3. At the same time, when the locking block 10 is inserted into the groove 12, the cylinder head 3 will not rotate unless there is a large external force interference.

[0030] Among them, an annular sealing plate 17 is fixedly connected to the bottom edge of the cylinder head 3, and an annular sealing groove 18 is opened at the upper edge of the cylinder body 1. The annular sealing plate 17 and the annular sealing groove 18 are adapted to each other.

[0031] By adapting the annular sealing plate 17 and the annular sealing groove 18 to each other, the cylinder head 3 and the cylinder body 1 can be rotatably connected, and at the same time, a certain sealing effect can be achieved.

[0032] Handles 5 are fixedly connected to both sides of the bottom of the cylinder 1.

[0033] The handle 5 allows users to easily pick up the device.

[0034] One of the connecting plates 7 has a pointer mark 13 on the bottom of its side wall, and a connection mark 14 is provided on the top of a handle 5.

[0035] When pointer 13 is aligned with connection pointer 14, it indicates that inlet 15 is aligned with connection hole 16, thus allowing the user to know in real time whether inlet 15 and connection hole 16 are connected.

[0036] Among them, the outer wall of the cylinder 1 is provided with an observation scale 6.

[0037] The observation scale 6 allows users to easily observe the volume of the sample taken from the syringe barrel 1. The syringe barrel 1 is usually made of transparent material, which is existing technology and will not be described in detail here.

[0038] This utility model provides a liquid detection and sampling device, the specific working principle of which is as follows:

[0039] In use, rotating the connecting plate 7 drives the cylinder head 3 to rotate. When the pointer mark 13 on the connecting plate 7 is aligned with the connection mark 14 on the handle 5, it indicates that the liquid inlet 15 is aligned with the connecting hole 16. At this time, the locking block 10 will be locked into the groove 12 to ensure that the cylinder head 3 will not rotate without being disturbed by a large external force. Then, according to the normal use of the injection molding machine, the sample is extracted from the liquid formaldehyde bottle. The observation scale 6 set can be used to make it convenient for the user to observe the volume of the sample taken from the cylinder 1. After the sample is extracted, rotate the connecting plate 7 180 degrees so that the two locking blocks 10 are locked into the other groove 12 respectively. At this time, the bottom of the cylinder head 3 can cover the liquid inlet 15 at the top of the cylinder 1, thereby preventing the liquid formaldehyde inside the cylinder 1 from evaporating.

[0040] Since the protruding end of the locking block 10 is a hemispherical structure, when the user manually rotates the connecting plate 7, the locking block 10 will automatically retract under greater pressure, thereby ensuring that the user can rotate the cylinder head 3. At the same time, when the locking block 10 is inserted into the groove 12, the cylinder head 3 will not rotate unless there is a large external force interference.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid detection sampling device comprising a barrel (1), characterised in that: The cylinder (1) is provided with a sealing plug (9) inside. A push rod (2) is fixedly connected to the bottom of the sealing plug (9). A cylinder head (3) is provided at the upper end of the cylinder (1). A rubber layer is provided at the bottom of the cylinder head (3). The cylinder head (3) is rotatably connected to the cylinder (1). An injection needle (4) is fixedly connected to the upper end of the cylinder head (3). A connecting hole (16) communicating with the injection needle (4) is opened at the bottom of the cylinder head (3). An inlet (15) communicating with the inside of the cylinder (1) is opened at the upper end of the cylinder (1). The size of the inlet (15) is the same as the size of the connecting hole (16). A connecting plate (7) is fixedly connected to the two symmetrical sides of the cylinder head (3). A limit mechanism is provided at the other end of the connecting plate (7).

2. The liquid detection sampling device of claim 1, wherein: The limiting mechanism consists of an annular guide rail (8), a locking block (10), and a slider (11). An annular guide rail (8) is fixedly sleeved on the outer wall of the cylinder (1). Two locking blocks (10) are provided on the annular guide rail (8). The two locking blocks (10) are symmetrically distributed on both sides of the annular guide rail (8). The locking blocks (10) and the annular guide rail (8) are connected by an elastic telescopic mechanism. The bottom of the side walls of the two connecting plates (7) that are close to each other are fixedly connected to sliders (11). The sliders (11) slide and fit with the annular guide rail (8). The side walls of the two sliders (11) that are close to each other are provided with grooves (12). The grooves (12) are adapted to the locking blocks (10).

3. The liquid detection sampling device of claim 2, wherein: The elastic telescopic mechanism consists of a movable block (19) and a spring (21). The movable block (19) is fixedly installed on the side of the locking block (10) near the annular guide rail (8). The movable block (19) is slidably installed in the movable groove (20) opened inside the annular guide rail (8). The spring (21) is fixedly connected between the side wall of the movable block (19) and the inner wall of the movable groove (20).

4. The liquid detection sampling device of claim 2, wherein: The extended end of the card block (10) has a hemispherical structure.

5. The liquid detection sampling device of claim 1, wherein: An annular sealing plate (17) is fixedly connected to the bottom edge of the cylinder head (3), and an annular sealing groove (18) is provided at the upper edge of the cylinder body (1). The annular sealing plate (17) and the annular sealing groove (18) are adapted to each other.

6. The liquid detection sampling device of claim 1, wherein: Handles (5) are fixedly connected to both sides of the bottom of the cylinder (1).

7. The liquid detection sampling device of claim 6, wherein: A pointer mark (13) is provided on the bottom side wall of one of the connecting plates (7), and a connection mark (14) is provided on the top of one of the handles (5).

8. The liquid detection sampling device of claim 1, wherein: The outer wall of the cylinder (1) is provided with observation scale (6).

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