Online sampling device

Abstract

The utility model discloses an on-line sampling device which comprises a sampling bottle, a needle valve, a lifting mechanism and a bottle positioning mechanism, the bottle opening of the sampling bottle is provided with a bottle cap with a rubber film, the needle valve comprises a valve body, a needle type adapter and a sampling needle, the valve body is arranged on a conveying pipeline, and the sampling needle is arranged at a sampling opening of the valve body through the needle type adapter; the lifting mechanism is arranged right below the sampling needle and comprises a lifting table and a driving part which is arranged below the lifting table and is used for driving the lifting table to do lifting motion; the bottle positioning mechanism is arranged on the lifting mechanism and comprises a bracket arranged on the lifting table and a profiling cover arranged over the bracket and matched with the upper portion of the sampling bottle, and the profiling cover is movably connected with the bracket through a hasp piece to form a cavity used for fixing the sampling bottle. The bottle positioning mechanism is arranged on the lifting mechanism, so that self-feeding and self-discharging of the sampling bottle are achieved, non-contact automatic sampling is completed, leakage of dangerous chemicals is reduced, damage to operators is reduced, and sampling is convenient, rapid, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical sampling, in particular to an online sampling device. Background Art

[0002] Sampling involves isolating a representative portion of a material or product for testing. This portion is called a sample, and the process of isolating it is called sampling. Testing can include measuring physical properties, analyzing chemical composition, or examining microbiological properties. The goal is to understand the entire product, confirm quality requirements, or identify or evaluate the substance.

[0003] A sampling valve is a type of valve whose primary function is to collect samples of the medium within a pipeline. Rotating the valve stem drives the plug on the stem to open or close the sampling port on the valve body. However, chemical samples are volatile and may leak and come into contact with the skin, potentially causing skin ulcers and other potential safety hazards. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the utility model provides an online sampling device with a simple structure, convenient and fast sampling, and safety and reliability.

[0005] The technical solution adopted by the present invention to solve the technical problem is to provide an online sampling device, comprising:

[0006] A sampling bottle having a bottle cap with a rubber membrane at its mouth;

[0007] A needle valve comprises a valve body, a needle adapter and a sampling needle, wherein the valve body is arranged on the delivery pipeline, and the sampling needle is arranged at the sampling port of the valve body through the needle adapter;

[0008] A lifting mechanism is provided directly below the sampling needle, the lifting mechanism comprising a lifting platform and a driving member provided under the lifting platform and used to drive the lifting platform to perform lifting motion;

[0009] A bottle positioning mechanism is provided on the lifting mechanism, comprising a bracket provided on the lifting platform, and a contoured cover provided directly above the bracket and adapted to the upper portion of the sampling bottle, wherein the contoured cover and the bracket are movably connected by a buckle to form a cavity for fixing the sampling bottle;

[0010] The contoured cover is provided with a through hole which is communicated with the cavity and has the same size as the rubber membrane of the bottle cap.

[0011] As a further improvement of the present invention, the bracket is detachably connected to the lifting platform via a fastener, and the bracket is provided with an annular portion for positioning the bottom of the sampling bottle;

[0012] The fastener includes two rotating connecting arms, which are arranged opposite to each other along the central axis of the contoured cover, and the upper ends are rotatably connected to the corresponding sides of the outer wall of the contoured cover through an axis; the lower ends of the two rotating connecting arms extend to both sides of the annular portion and overlap the fastening columns on both sides of the annular portion.

[0013] As a further improvement of the present invention, the fastener further comprises a limiting arm, which is a semicircular ring structure coaxially arranged with the central axis, and the notch of the semicircular ring structure faces one side of the annular portion and is consistent with the outer diameter of the annular portion;

[0014] The buckle piece is further provided with two overlapping interfaces which are in the same direction as the notches of the limiting arms and are adapted to the two buckle posts.

[0015] As a further improvement of the present invention, it also includes a sampling box with a door on one side, the needle valve is installed on the top of the sampling box through a valve bracket, the needle adapter passes through the upper wall of the sampling box and extends into the sampling box, the needle adapter is provided with a sampling needle protective cover at one end facing the sampling needle, and the sampling needle protective cover can be covered on the upper end of the contoured cover.

[0016] As a further improvement of the present invention, the lifting mechanism is arranged in the sampling box body, the driving member is a cylinder arranged in the vertical direction, the cylinder is installed on the lower wall of the sampling box body through the base, and the lifting platform is arranged on the piston rod of the cylinder.

[0017] As a further improvement of the present invention, the sampling box is provided with a mounting plate on the inner wall on the side away from the box door, and two position sensors are provided on the end of the mounting plate facing the box door and spaced apart in the vertical direction. The two position sensors are respectively arranged on the sides of the highest position and the lowest position of the lifting platform.

[0018] As a further improvement of the present invention, a proximity switch for monitoring the switch status of the box door is further provided in the sampling box.

[0019] The beneficial effects of the utility model are: by arranging a bottle positioning mechanism on the lifting mechanism, the sampling bottle can be automatically put in and out to complete non-contact automatic sampling, thereby reducing the leakage of dangerous chemicals and reducing the damage to the operator, and the sampling is convenient, fast, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram showing the sampling bottle in the sampling position of the present invention;

[0022] Figure 3 This is a schematic diagram of the exploded structure of the utility model without a sampling box;

[0023] Figure 4 This is a structural diagram of the utility model without a door.

[0024] The following description is made with reference to the accompanying drawings:

[0025] 1. Sampling bottle; 11. Rubber membrane; 12. Bottle cap; 2. Needle valve; 21. Valve body;

[0026] 22. Needle adapter; 23. Sampling needle; 24. Valve bracket; 25. Sampling needle protective cover; 3. Lifting mechanism; 31. Lifting platform; 32. Driving member; 321. Piston rod; 33. Base; 4. Bottle positioning mechanism; 41. Bracket; 411. Ring portion; 42. Contoured cover; 421. Perforation; 43. Cavity; 44. Fastener; 45. Rotating connecting arm; 451. Shaft; 46. Snap-on column; 47. Limiting arm; 48. Joint; 5. Sampling box; 51. Box door; 52. Mounting plate; 6. Position sensor; 7. Proximity switch. DETAILED DESCRIPTION

[0027] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0028] See Figures 1 to 4 The utility model provides an online sampling device, which is arranged in a medium conveying pipeline and is used for extracting medium samples. The online sampling device includes a sampling bottle 1, a needle valve 2, a lifting mechanism 3, and a bottle positioning mechanism 4 arranged on the lifting mechanism 3. The needle valve 2 includes a valve body 21, a needle adapter 22 and a sampling needle 23. The valve body 21 is arranged on the conveying pipeline, and the sampling needle 23 is arranged at the sampling port of the valve body 21 through the needle adapter 22. The valve body 21 adopts an existing three-way ball valve, which has a fluid channel connected to the medium conveying pipeline and a sampling port arranged at the lower end of the valve body 21 perpendicular to the liquid flow direction. A valve stem is provided in the valve body 21 to open or close the sampling port; at the same time, the valve body 21 can control the flow rate and flow of the medium flowing out of the sampling port. Whether the valve body 21 is manually controlled or automatically controlled, its working principle is the same as that of the prior art and will not be repeated here. See Figure 2 The needle valve adapter also has an air outlet needle for exhausting the air in the bottle when the sampling bottle is filled with sample.

[0029] The mouth of the sampling bottle 1 has a bottle cap 12 with a rubber membrane 11. On the one hand, the rubber membrane 11 facilitates puncture by the sampling needle 23 on the needle valve 2, so that the medium in the medium delivery pipeline can enter the sampling bottle 2 through the sampling needle 23. On the other hand, after sampling is completed, the needle hole in the rubber membrane 11 can be elastically closed when the sampling needle 23 is pulled out, thereby preventing leakage of the sample.

[0030] The bottle positioning mechanism 4 is arranged on the lifting mechanism 3, and the lifting mechanism 3 is arranged just below the sampling needle 23. The lifting mechanism 3 includes a lifting platform 31, and a driving member 32 arranged under the lifting platform 31 and used to drive the lifting platform 31 to perform lifting movements; the bottle positioning mechanism 4 includes a bracket 41 arranged on the lifting platform 31, and a contoured cover 42 arranged just above the bracket 41 and adapted to the upper part of the sampling bottle 1. The contoured cover 42 is movably connected to the bracket 41 by a buckle to form a cavity 43 for fixing the sampling bottle 1; the contoured cover 42 is provided with a through hole 421 that is connected to the cavity 43 and has the same size as the rubber membrane 11 of the bottle cap 12. Specifically, when in the starting position (refer to Figure 4 ), after the sampling bottle 1 is fixed in the cavity 43 of the bottle positioning mechanism 4, the lifting mechanism 3 drives the bottle positioning mechanism 4 to rise with the sampling bottle 1, and stops after the sampling needle 23 is inserted into the set depth in the sampling bottle 1 (reference Figure 2 (For the convenience of subsequent description, this position is defined as the sampling position). Then, valve body 21 opens the sampling port, allowing the medium in the medium pipeline to flow into sampling bottle 1 through sampling needle 23. After quantitative sampling, lifting mechanism 3 drives bottle positioning mechanism 4 to lower sampling bottle 1 to the starting position. During the downward movement of sampling bottle 1, bottle positioning mechanism 4 fixes it. Therefore, even if there is a large resistance between sampling needle 23 and rubber membrane 11 of sampling bottle 1, it can ensure smooth separation between sampling bottle 1 and sampling needle 23. This completes the automatic entry and exit of the sampling bottle, realizes non-contact automatic sampling, reduces the leakage of hazardous chemicals, and reduces harm to operators, with high safety.

[0031] Furthermore, the bracket 41 is detachably connected to the lifting platform 31 via a fastener 44, so that the bracket 41 can be easily replaced according to sampling bottles 1 of different specifications. The bracket 41 is provided with an annular portion 411 for positioning the bottom of the sampling bottle 1. The annular portion 411 can be arranged around the outer periphery of the bottom of the sampling bottle 1 to ensure the stability of the fixing of the sampling bottle.

[0032] The fastener includes two rotating connecting arms 45, which are arranged opposite to each other along the central axis O' of the contoured cover 42, and the upper ends are rotatably connected to the corresponding sides of the outer wall of the contoured cover 42 through the shaft 451; the lower ends of the two rotating connecting arms 45 extend to both sides of the annular portion 411, and overlap the fastening columns 46 on both sides of the annular portion 411, that is, the contoured cover 42 and the bracket 41 are split structures, which is convenient for placing and fixing the sampling bottle 1 in the starting position.

[0033] The fastener also includes a limiting arm 47, which is a semicircular ring structure coaxially arranged with the central axis O'. The notch of the semicircular ring structure faces one side of the annular portion 411 and is consistent with the outer diameter of the annular portion 411. The fastener is also provided with two docking ports 48 that are aligned with the notch of the limiting arm 47 and are compatible with the two latching posts 46. When the lifting platform 31 is in the starting position, the sampling bottle 1 is placed on the bracket 41, and the contoured cover 42 is then placed on the upper portion of the sampling bottle 1. The rotating connecting arm 45 is rotated so that the docking port 48 on it is engaged with the latching post 46 of the bracket 41 to secure the sampling bottle 1. The provision of the limiting arm 47 facilitates the simultaneous operation of the two rotating connecting arms 45.

[0034] Furthermore, the online sampling device of the present invention includes a sampling box 5 having a door 51 on one side. The needle valve 2 is mounted on the top of the sampling box 5 via a valve bracket 24. The needle adapter 22 extends through the upper wall of the sampling box 5 and into the sampling box 5. The needle adapter 22 is provided with a sampling needle protective cover 25 at the end facing the sampling needle 23, and the sampling needle protective cover 25 can be mounted on the upper end of the contoured cover 42. The lifting mechanism 3 is disposed within the sampling box 5. The driving member 32 is a vertically arranged cylinder mounted on the lower wall of the sampling box 5 via a base 33. The lifting platform 31 is disposed on the piston rod 321 of the cylinder.

[0035] The sampling box body 5 is provided with a mounting plate 52 on the inner wall of the side away from the box door 51, and two position sensors 6 are provided on the end of the mounting plate 52 facing the box door 51, which are spaced apart in the vertical direction. The two position sensors 6 are respectively arranged on the side of the highest position and the lowest position of the lifting platform 31, that is, the two position sensors 6 are respectively used to monitor the starting position and the sampling position of the sampling bottle 1, so as to control the opening and closing of the needle valve 2 through the control system. A proximity switch 7 for monitoring the switch status of the box door 51 is provided in the sampling box body 5. The proximity switch 7 is connected to the control system signal and is used to feedback the switch status of the box door 51 to the control system. It should be noted that the control system can adopt a conventional PLC control system, which is used to control the signal transmission between the needle valve, the lifting mechanism, and the proximity switch 7 to achieve coordinated action between the various components and further improve the safety of the sampling device.

[0036] In summary, the online sampling device provided by the utility model, by arranging a bottle positioning mechanism on the lifting mechanism, can realize the self-entry and self-extraction of the sampling bottle to complete non-contact automatic sampling, reduce the leakage of hazardous chemicals, and reduce the damage to the operator. Sampling is convenient, fast, safe and reliable.

[0037] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. An online sampling device, characterized in that ,include: A sampling bottle (1) having a bottle cap (12) with a rubber membrane (11) at its mouth; A needle valve (2) comprises a valve body (21), a needle adapter (22) and a sampling needle (23), wherein the valve body (21) is arranged on a delivery pipeline, and the sampling needle (23) is arranged on a sampling port of the valve body (21) through the needle adapter (22); A lifting mechanism (3) is provided directly below the sampling needle (23), and the lifting mechanism (3) includes a lifting platform (31) and a driving member (32) provided below the lifting platform (31) and used for driving the lifting platform (31) to perform lifting motion; A bottle positioning mechanism (4) is provided on the lifting mechanism (3), comprising a bracket (41) provided on the lifting platform (31), and a contoured cover (42) provided just above the bracket (41) and adapted to the upper portion of the sampling bottle (1), wherein the contoured cover (42) and the bracket (41) are movably connected by a buckle to form a cavity (43) for fixing the sampling bottle (1); The contoured cover (42) is provided with a perforation (421) which is in communication with the cavity (43) and has the same size as the rubber membrane (11) of the bottle cap (12).

2. The online sampling device according to claim 1, characterized in that: The bracket (41) is detachably connected to the lifting platform (31) via a fastener (44), and the bracket (41) is provided with an annular portion (411) for positioning the bottom of the sampling bottle (1); The fastener comprises two rotating connecting arms (45), the two rotating connecting arms (45) being arranged opposite to each other along the central axis (O') of the contoured cover (42), and the upper ends of the two rotating connecting arms (45) being rotatably connected to the corresponding sides of the outer wall surface of the contoured cover (42) via shafts (451); the lower ends of the two rotating connecting arms (45) extending to both sides of the annular portion (411) and overlapping the fastening columns (46) on both sides of the annular portion (411).

3. The online sampling device according to claim 2, characterized in that: The fastener also includes a limiting arm (47), which is a semicircular ring structure coaxially arranged with the central axis (O'), with a notch of the semicircular ring structure facing one side of the annular portion (411) and consistent with the outer diameter of the annular portion (411); The buckle piece is also provided with two engaging interfaces (48) which are aligned with the notches of the limiting arms (47) and are adapted to the two buckle posts (46).

4. The online sampling device according to claim 3, characterized in that: It also includes a sampling box (5) with a box door (51) on one side, the needle valve (2) is installed on the top of the sampling box (5) through the valve bracket (24), the needle adapter (22) passes through the upper wall of the sampling box (5) and extends into the sampling box (5), and the needle adapter (22) is provided with a sampling needle protection cover (25) at one end facing the sampling needle (23), and the sampling needle protection cover (25) can be covered on the upper end of the contoured cover (42).

5. The online sampling device according to claim 4, characterized in that: The lifting mechanism (3) is arranged in the sampling box (5), the driving member (32) is a cylinder arranged in the vertical direction, and the cylinder is installed on the lower wall of the sampling box (5) through a base (33), and the lifting platform (31) is arranged on the piston rod (321) of the cylinder.

6. The online sampling device according to claim 5, characterized in that: The sampling box (5) is provided with a mounting plate (52) on the inner wall of a side away from the box door (51), and two position sensors (6) are provided on one end of the mounting plate (52) facing the box door (51). The two position sensors (6) are arranged at intervals in the vertical direction, respectively, and are arranged on the sides of the highest position and the lowest position of the lifting platform (31).

7. The online sampling device according to claim 6, characterized in that: A proximity switch (7) for monitoring the opening and closing state of the box door (51) is also provided in the sampling box (5).

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