Quantitative self-taking device for sample liquid

Abstract

The utility model discloses a sample liquid quantitative self-taking device which comprises a sampling valve and a driving assembly, a valve body of the sampling valve comprises a sampling channel and a valve seat, a valve cavity is arranged on the valve seat, a sampling port and a sample placing port are respectively arranged at the upper end and the lower end of the valve cavity along the radial direction, and a valve rod is rotatably arranged on the valve seat. The valve rod comprises a valve element matched with the valve cavity and a linkage shaft which is arranged on the valve element and extends out of the valve seat in the axial direction of the valve element, a liquid storage bin which is coaxial with the valve cavity and used for containing quantitative sample liquid is formed in the valve element, and a bin opening is formed in the liquid storage bin in the radial direction of the liquid storage bin; the driving assembly comprises a rotating cylinder used for driving the valve rod to drive the valve core to rotate, so that the bin opening in the valve core can rotate by 0-180 degrees relative to the valve cavity, and a sampling state and a lofting state are switched; in a sampling state, the bin opening is in butt joint with the sampling opening, so that sample liquid in the sampling channel is injected into and fills the liquid storage bin; in the sample placing state, the bin opening and the sample placing opening are in butt joint, so that sample liquid in the liquid storage bin flows out to complete quantitative sampling, the structure is simple, sampling is convenient and fast, and safety and reliability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of chemical sampling technology, specifically to a sample liquid quantitative self-collection device. Background Technology

[0002] Sampling refers to the process of selecting individuals or samples from a population, that is, the process of testing or observing the population. There are two types: random sampling and non-random sampling. Random sampling refers to sampling methods that draw samples from the population according to randomization principles; it is without any subjectivity and includes simple random sampling, systematic sampling, cluster sampling, and stratified sampling. In industrial production, sampling methods are often used to test industrial products.

[0003] Currently, traditional manual sampling is time-consuming and labor-intensive, prone to errors, and can cause significant harm to production. It cannot be automated, resulting in low sampling efficiency and causing great inconvenience to users. Therefore, we propose a sample liquid quantitative self-collection device. Summary of the Invention

[0004] To overcome the above-mentioned defects, this utility model provides a sample liquid quantitative self-collection device, which has a simple structure, convenient and quick sampling, and is safe and reliable.

[0005] The technical solution adopted by this utility model to solve its technical problem is to provide a sample liquid quantitative self-collection device, comprising:

[0006] A sampling valve includes a valve body and a valve stem. The valve body includes a sampling channel connected to a main pipeline and arranged horizontally, and a valve seat located at the bottom of the sampling channel. The valve seat has a cylindrical valve cavity. The upper and lower ends of the valve cavity along its radial direction are respectively provided with a sampling port and a discharge port. The sampling port communicates with the sampling channel. The valve stem is rotatably mounted on the valve seat. The valve stem includes a valve core adapted to the valve cavity and a linkage shaft located on the valve core and extending axially to the outside of the valve seat. The valve core has a storage chamber coaxially arranged with the valve cavity for containing a quantitative sample liquid. The storage chamber has a port along its radial direction.

[0007] The drive assembly includes a rotary cylinder for driving the valve stem to rotate the valve core, so that the port on the valve core can rotate 0°-180° relative to the valve cavity to switch between sampling state and release state.

[0008] In the sampling state, the hopper and the sampling port are connected so that the sample liquid in the sampling channel is injected and fills the storage tank.

[0009] In the sampling state, the hopper and the sampling port are connected to allow the sample liquid in the storage tank to flow out and complete the quantitative sampling.

[0010] As a further improvement of this utility model, the rotary cylinder is fixed to one side of the sampling valve by a cylinder bracket. The rotation shaft of the rotary cylinder is coaxial with the valve stem. One end of the rotary cylinder is connected to the linkage shaft of the valve stem through a coupling, and the other end extends axially to the side of the rotary cylinder away from the sampling valve.

[0011] As a further improvement of this utility model, the rotary cylinder is provided with a stroke limiting component on the side opposite to the sampling valve;

[0012] The travel limit component includes:

[0013] A trigger arm is located at the other end of the rotating shaft and rotates synchronously with the rotating shaft.

[0014] The limit switch is provided in two sets, which are respectively located on both sides of the trigger arm in the horizontal direction. Each set of limit switches has a swing arm on the side facing the trigger arm, and the end of the swing arm is provided with a roller.

[0015] As a further improvement of this utility model, it also includes a gas supply component, which comprises:

[0016] The main air pipe has an air filter at its air inlet.

[0017] The cylinder air supply pipe is connected to the main air pipe via a first solenoid valve to control the movement of the rotary cylinder.

[0018] As a further improvement of this utility model, a cleaning pipe is connected to the main air pipe via a three-way connector, and the air outlet of the cleaning pipe is placed in the valve cavity of the valve seat.

[0019] The liquid storage tank of the valve stem is configured with an outlet facing the air outlet of the cleaning tube, so that the cleaning tube can purge the liquid storage tank after quantitative sampling is completed.

[0020] As a further improvement of this utility model, the cleaning pipe is provided with a second solenoid valve, a pressure regulating valve and a manual on / off valve in sequence along the path from the connection end with the three-way connector to the valve seat.

[0021] As a further improvement of this utility model, the sampling valve is installed on the top of the sampling box via a valve bracket. A needle adapter is provided on the top. The needle adapter penetrates the top vertically and is fixedly installed on the top via an adapter flange. The upper end of the needle adapter is sealed and connected to the sample outlet via a first sealing gasket, and the lower end is provided with a sampling needle that connects to the sample bottle. A second sealing gasket is provided between the instrument flange and the top.

[0022] The beneficial effects of this utility model are as follows: by opening a storage chamber for containing a quantitative sample liquid on the valve core of the sampling valve, and setting a port on the storage chamber that can selectively connect with the sampling port and the discharge port of the valve cavity, the valve rod is driven by a rotary cylinder to rotate 0°-180° relative to the valve cavity, thereby realizing the switching between the sampling state and the discharge state of the port, thus completing the quantitative self-collection of the sample liquid. The structure is simple, the sampling is convenient and quick, and it is safe and reliable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0025] Figure 3 This is a front view of the structure of this utility model without a sampling box.

[0026] Figure 4 This utility model Figure 3 A cross-sectional view along the AA direction;

[0027] Figure 5 This is a schematic diagram of the pin-type adapter of this utility model.

[0028] Referring to the accompanying drawings, the following explanations are provided:

[0029] 1. Sampling valve; 11. Valve body; 111. Sampling channel; 112. Valve seat; 1121. Valve chamber; 1122. Sampling port; 1123. Discharge port; 1124. Cleaning port; 12. Valve stem; 121. Valve core; 1211. Liquid storage tank; 1212. Tank opening; 1213. Through port; 122. Linkage shaft; 2. Drive assembly; 21. Rotary cylinder; 211. Rotary shaft; 212. Coupling; 3. Cylinder bracket; 4. Stroke limit assembly; 41. Trigger arm; 42. Limit... Position switch; 421, swing arm; 422, roller; 5, air supply assembly; 51, main air pipe; 511, air filter; 512, tee connector; 52, cylinder air supply pipe; 521, first solenoid valve; 53, cleaning pipe; 531, second solenoid valve; 532, pressure regulating valve; 533, manual on / off valve; 6, valve bracket; 7, sampling box; 71, top; 8, needle adapter; 81, adapter flange; 82, first sealing gasket; 83, sampling needle; 84, second sealing gasket. Detailed Implementation

[0030] The preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] See Figures 1 to 5The present invention provides a sample liquid quantitative self-collection device, including a sampling valve and a driving component disposed on one side of the sampling valve for driving the valve stem of the sampling valve to rotate for quantitative sampling. Specifically, the sampling valve 1 includes a valve body 11 and a valve stem 12. The valve body 11 includes a sampling channel 111 connected to the main pipeline and arranged horizontally, and a valve seat 112 located at the bottom of the sampling channel 111. The valve seat 112 has a cylindrical valve cavity 1121. The upper and lower ends of the valve cavity 1121 along its radial direction are respectively provided with a sampling port 1122 and a discharge port 1123. The sampling port 1122 is connected to the sampling channel 111. The valve stem 12 is rotatably located on the valve seat 112. The valve stem 12 includes a valve core 121 adapted to the valve cavity 1121 and a linkage shaft 122 located on the valve core 121 and extending axially to the outside of the valve seat 112. The valve core 121 has a storage tank 1211 coaxially arranged with the valve cavity 1121 and used to contain a quantitative sample liquid. The storage tank 1211 has a tank opening 1212 along its radial direction.

[0032] The drive assembly 2 includes a rotary cylinder 21 for driving the valve stem 12 to rotate the valve core 121, so that the port 1212 on the valve core 121 can rotate 0°-180° relative to the valve cavity 1121 to switch between sampling and dispensing states. In the sampling state, the port 1212 and the sampling port 1122 are connected so that the fluid flowing through the sampling channel 111 is injected through the sampling port 1122 and fills the storage tank 1211. The volume of the storage tank 1211 disclosed in this embodiment is 500ml. The volume setting can be selected by selecting different valve stems according to the sampling volume requirements. In the dispensing state, the port 1212 and the dispensing port 1123 are connected so that the sample liquid in the storage tank 1211 flows out to the sampling bottle (not shown), thereby completing automatic quantitative sampling. In other words, the rotary cylinder 21 drives the valve stem 12, causing the port 1212 on the valve stem 12 to switch between its two vertical ends. When the port 1212 faces upward, it is in the sampling state (obtaining a quantitative sample liquid from the sampling channel), and when the port 1212 faces downward, it is in the dispensing state. The structure is simple, the sampling process is convenient, and the required quantitative sample liquid can be obtained through the valve stem 12 with different volume storage tanks 1211.

[0033] Furthermore, the rotary cylinder 21 is fixed to one side of the sampling valve 1 by the cylinder bracket 3. The rotary shaft 211 of the rotary cylinder 21 is coaxially arranged with the valve stem 12. One end of the rotary cylinder 21 is connected to the linkage shaft 122 of the valve stem 12 through the coupling 212, which facilitates the disassembly and assembly of the valve stem and the rotary cylinder 21, thereby facilitating the replacement of the valve stem. The other end of the rotary shaft 211 extends axially to the side of the rotary cylinder 21 away from the sampling valve 1.

[0034] Furthermore, the rotary cylinder 21 is provided with a stroke limit assembly 4 on the side opposite to the sampling valve 1. The stroke limit assembly 4 includes a trigger arm 41 and limit switches 42 located on both sides of the trigger arm 41. The trigger arm 41 is located on the other end of the rotating shaft 211 and rotates synchronously with the rotating shaft 211. Two sets of limit switches 42 are provided, with the two sets of limit switches 42 respectively located on both sides of the trigger arm 41 in the horizontal direction. Both sets of limit switches 42 have a swing arm 421 on the side facing the trigger arm 41, and the end of the swing arm 421 is provided with a roller 422. The limit switch 42 is preferably an existing Z-type plunger explosion-proof stroke limit switch. Through the PLC control system (not shown), the switching state of the valve stem is fed back. That is, when the valve stem is in the sampling state, the trigger arm 41 activates the left limit switch, and when the valve stem is in the release state, the trigger arm activates the right limit switch. Thus, the state of the sampling valve is fed back to the PLC control system, which can realize self-sampling. It should be noted that the setting of limit switch 42 provides a way to provide feedback on the switching state of the valve stem. However, the working principle of the limit switch, the transmission and feedback of electrical signals, and the PLC control system are conventional technical means and will not be described in detail in this embodiment.

[0035] In addition, to ensure the operation of the rotary cylinder, the device is also equipped with an air supply assembly 5, which includes a main air pipe 51, a cylinder air supply pipe 52, and a cleaning pipe 53. The air inlet of the main air pipe 51 is equipped with an air filter 511 to provide clean compressed air to the device. The cylinder air supply pipe 52 is connected to the main air pipe 51 through a first solenoid valve 521 to control the movement of the rotary cylinder 21. The cleaning pipe 53 is connected to the main air pipe 51 through a three-way connector 512. The outlet of the cleaning pipe 53 is located in the valve chamber 1121 of the valve seat 112. The valve chamber 1121 is provided with a cleaning port 1124 that aligns with the outlet of the cleaning pipe 53. The liquid storage tank 1211 of the valve stem 12 is provided with a through port 1213 facing the outlet of the cleaning pipe 53 so that the cleaning pipe 53 can purge the liquid storage tank 1211 after quantitative sampling. Specifically, as those skilled in the art will know, the first solenoid valve 521, the second solenoid valve 531, and the pressure regulating valve 532 are controlled by a PLC control system to achieve automatic sampling. After sampling is completed, the second solenoid valve is activated to open the purge tube 53 to blow air into the valve chamber to prevent residual sample liquid in the storage tank 1211.

[0036] Furthermore, to facilitate sampling from the sampling bottle (not shown), this device is equipped with a sampling box 7. The sampling valve 1 is mounted on the top 71 of the sampling box 7 via a valve bracket 6. A needle adapter 8 is provided on the top 71. The needle adapter 8 penetrates the top 71 vertically and is fixedly mounted on the top 71 via an adapter flange 81. The upper end of the needle adapter 8 is sealed to the sample outlet 1123 via a first sealing gasket 82, and the lower end is provided with a sampling needle 83 that aligns with the sample bottle. A second sealing gasket 84 is provided between the fitting flange 81 and the top 71. This allows for the installation of a platform within the sampling box 7 capable of holding the sampling bottle. When sampling is required, the sampling bottle is placed on the platform, with its mouth aligned with the sampling needle, thus completing the quantitative sampling.

[0037] In summary, the sample liquid quantitative self-collection device provided by this utility model has a storage chamber for containing quantitative sample liquid on the valve core of the sampling valve, and a port on the storage chamber that can be selectively connected to the sampling port and the discharge port of the valve cavity. By using a rotary cylinder to drive the valve rod to rotate 0°-180° relative to the valve cavity, the port can be switched between the sampling state and the discharge state, thereby completing the quantitative self-collection of sample liquid. The device has a simple structure, is convenient and quick to collect samples, and is safe and reliable.

[0038] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A sample liquid dosing and self-taking device, characterized in that , comprising: A sampling valve (1) comprising a valve body (11) and a valve stem (12), the valve body (11) comprising a sampling channel (111) connected with a main pipeline and arranged in a horizontal direction, and a valve seat (112) arranged at the bottom of the sampling channel (111), the valve seat (112) being provided with a cylindrical valve cavity (1121), the valve cavity (1121) being provided with a sampling port (1122) and a dispensing port (1123) at the upper and lower ends thereof in the radial direction, the sampling port (1122) being in communication with the sampling channel (111), the valve stem (12) being rotatably arranged on the valve seat (112), the valve stem (12) comprising a valve core (121) matched with the valve cavity (1121) and a linkage shaft (122) arranged on the valve core (121) and extending to the outside of the valve seat (112) in the axial direction, the valve core (121) being provided with a liquid storage bin (1211) coaxially arranged with the valve cavity (1121) and used for containing a quantitative sample liquid, the liquid storage bin (1211) being provided with a bin port (1212) in the radial direction thereof; A driving assembly (2) comprising a rotary cylinder (21) used for driving the valve stem (12) to rotate the valve core (121) so that the bin port (1212) on the valve core (121) can rotate relative to the valve cavity (1121) by 0°-180° to switch between a sampling state and a dispensing state; In the sampling state, the bin port (1212) and the sampling port (1122) are connected to enable the sample liquid in the sampling channel (111) to be injected into and fill the liquid storage bin (1211); In the dispensing state, the bin port (1212) and the dispensing port (1123) are connected to enable the sample liquid in the liquid storage bin (1211) to flow out to complete quantitative sampling.

2. The sample liquid dosing apparatus according to claim 1, characterized by: The rotary cylinder (21) is fixed to one side of the sampling valve (1) through a cylinder support (3), the rotary shaft (211) of the rotary cylinder (21) is coaxially arranged with the valve stem (12), one end of the rotary shaft (211) is drivingly connected with the linkage shaft (122) of the valve stem (12) through a shaft coupling (212), and the other end of the rotary shaft (211) extends to the side of the rotary cylinder (21) away from the sampling valve (1) in the axial direction.

3. The sample liquid dosing apparatus according to claim 2, characterized in that: The rotary cylinder (21) is provided with a stroke limiting assembly (4) on the side away from the sampling valve (1); The stroke limiting assembly (4) comprises: A trigger arm (41) arranged on the other end of the rotary shaft (211) and rotating synchronously with the rotary shaft (211); Two sets of limit switches (42) arranged on the two sides of the trigger arm (41) in the horizontal direction, and each set of limit switches (42) being provided with a swing arm (421) on the side facing the trigger arm (41), and the end of the swing arm (421) being provided with a roller (422).

4. The sample liquid dosing apparatus according to claim 3, wherein Further comprising a gas supply assembly (5), the gas supply assembly (5) comprising: A main air pipe (51) is provided with an air filter (511) at its air inlet; A cylinder air pipe (52) is connected with the main air pipe (51) through a first electromagnetic valve (521) to control the action of the rotary cylinder (21).

5. The sample liquid dosing apparatus according to claim 4, wherein: A cleaning pipe (53) is connected with the main air pipe (51) through a tee joint (512), and the air outlet of the cleaning pipe (53) is arranged in the valve cavity (1121) of the valve seat (112). The liquid storage bin (1211) of the valve rod (12) is arranged as an opening (1213) towards the air outlet side of the cleaning pipe (53) to blow the liquid storage bin (1211) through the cleaning pipe (53) after the quantitative sampling is completed.

6. The sample liquid dosing apparatus according to claim 5, wherein: The cleaning pipe (53) is sequentially provided with a second electromagnetic valve (531), a pressure regulating valve (532) and a manual on-off valve (533) along the path from the connection end of the tee joint (512) to the valve seat (112).

7. The sample liquid dosing apparatus according to claim 5, wherein: The sampling valve (1) is installed on the top (71) of the sampling box (7) through a valve support (6), the top (71) is provided with a needle type adapter (8) penetrating the top (71) in the vertical direction and fixedly installed on the top (71) through an adapter flange (81), the upper end of the needle type adapter (8) is sealed and connected with the sampling opening (1123) through a first sealing gasket (82), the lower end is provided with a sampling needle (83) connected with a sample bottle, and the adapter flange (81) and the top (71) are provided with a second sealing gasket (84).

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