Solution sampling device and method

Abstract

The invention discloses a solution sampling device and method, the solution sampling device comprises: a sampling vessel having an accommodating cavity, a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet being respectively communicated with the accommodating cavity; the connecting frame is connected to the upper part of the sampling vessel; the movable sampling piece is arranged in the accommodating cavity and is positioned at the liquid outlet; one end of the sampling rope is connected with the movable sampling piece, the other end of the sampling rope extends out of the containing cavity and is connected with the side wall of the connecting frame, and the sampling rope is suitable for controlling the movable sampling piece to move away from the liquid outlet under the pulling action when liquid is discharged from the liquid outlet. When a sample solution is collected and transferred to a sampling bottle, the sampling rope is pulled, the movable sampling piece is lifted, and the sample solution flows out of the liquid outlet, so that the purpose of sampling without direct contact with chemicals is achieved, pollution to the chemicals is avoided, and personal safety risks such as acid and alkali corrosion and respiratory tract stimulation are avoided or reduced.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear electrochemistry, and in particular to a solution sampling device and method. Background Art

[0002] The secondary circuit system of the nuclear power unit needs to add an ammonia water regulation system to adjust the pH value of the water quality to a reasonable range, and the condensate polishing regeneration system needs to use a large amount of hydrochloric acid and sodium hydroxide to regenerate the resin. If the ammonia solution contains too many impurities, it will directly affect the water quality of the secondary circuit system, the purity of the regeneration chemical solution will affect the resin regeneration degree, and the quality of the polishing effluent will be affected. Therefore, it is necessary for the chemical staff of the nuclear power plant to conduct laboratory principal component analysis and impurity analysis on the bulk chemical tank truck solutions entering the plant, and the unloading can only be accepted after the indicators are qualified.

[0003] According to the requirements of GB619-1988 Chemical Reagent Sampling and Acceptance Rules, when the tank truck storage tank has only a top sampling port, you can use a suitable sampling tube or sampling bottle to take samples of the same volume from three different horizontal positions of the container: the top (1 / 10 from the liquid surface), the middle (3 / 10 from the liquid surface), and the bottom (9 / 10 from the liquid surface), mix them evenly, put them into the sample container, cover them tightly, and mark them.

[0004] When sampling at the top filling port of a tank truck, there are several problems: it is easy to cause acid and alkali splash corrosion, which poses a risk of personal injury. The sample is easily contaminated during sampling, making the analysis results inaccurate and unreliable. Summary of the invention

[0005] In view of this, the present invention provides a solution sampling device and method to solve the problem of acid and alkali splash corrosion that is easily caused when sampling at the filling port on the top of the tank of a tank truck.

[0006] In a first aspect, the present invention provides a solution sampling device, comprising:

[0007] A sampling vessel, wherein the sampling vessel has a containing cavity, a liquid inlet and a liquid discharge port, wherein the liquid inlet and the liquid discharge port are respectively connected to the containing cavity;

[0008] A connecting frame, the connecting frame is connected and arranged above the sampling vessel;

[0009] A movable sampling piece, wherein the movable sampling piece is arranged in the accommodating cavity and located at the position of the liquid discharge port;

[0010] A sampling rope, one end of which is connected to the movable sampling piece, and the other end of which extends from the accommodating cavity and is connected to the side wall of the connecting frame. When the discharge port is draining, the sampling rope is suitable for controlling the movable sampling piece to move away from the discharge port under the pulling action.

[0011] The beneficial effects of the above solution sampling device are as follows: when sampling, the sampling rope is not pulled, and the movable sampling piece blocks the drainage port under the gravity of the solution in the sampling vessel, thereby preventing leakage of the sample solution after the sample solution is collected. When the sample solution is collected and transferred to the sampling bottle, the sampling rope is pulled to lift the movable sampling piece, and the sample solution flows out of the drainage port, achieving the purpose of sampling without direct contact with chemicals, avoiding pollution of chemicals, and avoiding or reducing personal safety risks such as acid-base corrosion and respiratory irritation.

[0012] In an optional embodiment, the connecting frame is a telescopic connecting frame, and the connecting frame includes:

[0013] A fixing rod, the fixing rod is arranged on the sampling vessel and extends upward from the sampling vessel, and a telescopic slot is vertically arranged on the top of the fixing rod;

[0014] A telescopic rod is inserted into a telescopic slot and can be telescoped along the direction of the telescopic slot. The telescopic rod is fixed to a fixed rod by a fixing structure. A scale is provided on the telescopic rod, and the scale is suitable for indicating the placement position of the sampling vessel.

[0015] The beneficial effect of the above technical solution is that the telescopic rod is retracted into the telescopic card slot when not in use, making the sampling device more convenient to store, saving storage space, and more convenient to carry and use.

[0016] The telescopic rod can be extended and retracted at will to achieve sampling of different depths of the tank truck solution. The scale on the telescopic rod has clear values, which can accurately detect the position of the sampling vessel in the solution container, ensuring that each sampling can accurately reach the designated position, meeting the national standard requirements for tank truck sampling, and the collected samples are more comprehensive and representative.

[0017] In an optional embodiment, a handle is connected to the top end of the telescopic rod, an angle is formed between the handle and the telescopic rod, and the handle is suitable for being held by a human hand.

[0018] In an optional embodiment, the movable sampling piece is located above the liquid inlet, and the size of the movable sampling piece is larger than the size of the liquid inlet, so that the movable sampling piece can block the liquid discharge port when it is located at the liquid discharge port.

[0019] In an optional embodiment, the upper portion of the sampling vessel is configured as a cylindrical tube, and the lower portion of the sampling vessel is configured as a conical tube with an inner diameter gradually decreasing from top to bottom; the liquid inlet is configured at the top of the sampling vessel, and the liquid outlet is configured at the bottom of the sampling vessel.

[0020] The beneficial effects of the above technical solution are as follows: the lower part of the sampling vessel is set in a cone shape, and the movable sampling piece is located above the liquid inlet, and when the movable sampling piece is lifted upward, a drainage gap will be generated between the movable sampling piece and the wall surface of the lower part of the sampling vessel, and the sample solution in the accommodating cavity can flow from the drainage gap to the drainage port, and the sample solution is discharged through the drainage port set as a sharp mouth at the bottom of the sampling vessel, thereby achieving the purpose of drainage and avoiding the risk of acid and alkali splashing caused by the pouring of the sample solution. When the movable sampling piece is not lifted, the movable sampling piece moves downward under the gravity of the sample solution in the accommodating cavity to block the drainage port.

[0021] In an optional embodiment, the solution sampling device is used for sampling solutions in bulk chemical tank trucks.

[0022] In an optional embodiment, the sampling vessel, connecting frame, movable sampling piece and sampling rope are all made of corrosion-resistant materials.

[0023] In a second aspect, the present invention provides a solution sampling method, wherein the method samples a solution by using the solution sampling device, and comprises the following steps:

[0024] S1. Based on the characteristics of the solution container, multiple sampling positions are set in the depth direction;

[0025] S2. Using the solution sampling device, sample the solution at each sampling position respectively.

[0026] The beneficial effects of the method of using the above-mentioned solution sampling device are the same as the beneficial effects of the above-mentioned solution sampling device, and will not be described in detail here.

[0027] In an optional embodiment, in step S2, the specific steps of sampling the solution at a certain sampling position are:

[0028] S21. Based on the depth information of the sampling position area, control the telescopic state of the connecting frame, hold the connecting frame to place the sampling vessel in the sampling position area of ​​the solution container; determine whether the sampling vessel is in place by the scale on the side wall of the connecting frame;

[0029] S22. Collecting the solution in the sampling location area through a sampling vessel;

[0030] S23. Holding the connecting frame, lift the sampling vessel upward, and remove the sampling vessel from the solution container;

[0031] S24. Place a sampling bottle under the sampling vessel, pull the sampling rope, control the movable sampling piece to lift up, and make the sample solution flow out from the bottom of the sampling vessel into the sample bottle.

[0032] In an optional embodiment, when performing step S24, part of the sample solution flows out from the bottom of the sampling vessel into the sample bottle;

[0033] After step S24 is performed, the remaining sample solution in the sampling vessel is recovered into the acid-base waste liquid barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic structural diagram of a solution sampling device provided for the invention.

[0036] Description of reference numerals:

[0037] 1. Movable sampling piece, 2. Sampling rope, 3. Connecting frame, 31. Fixed rod, 32. Telescopic rod, 4. Handle, 5. Sampling vessel, 51. Accommodating cavity, 52. Liquid inlet, 53. Liquid outlet. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0039] When sampling at the filling port on the top of the tank truck, there are several problems: 1. It is easy to cause acid and alkali splash corrosion, which poses a risk of personal injury. 2. Sampling cannot accurately obtain samples from different locations, sampling does not meet national standards, and the samples are not representative. 3. Samples are easily contaminated during sampling, making the analysis results inaccurate and unreliable.

[0040] Based on this, the present invention provides a solution sampling device and method to achieve sampling of different depth areas of tank truck canned solution, making the sampling more comprehensive and representative, meeting the national standard sampling requirements, and at the same time avoiding or reducing the safety risks of acid and alkali corrosion and respiratory irritation to personnel.

[0041] Combine the following Figure 1, the specific embodiments of the present invention are described in detail in combination with the solution sampling device of the first aspect of the present invention and the method for using the solution sampling device of the second aspect of the present invention.

[0042] According to an embodiment of the present invention, in a first aspect, a solution sampling device is provided, comprising a sampling vessel 5, a connecting frame 3, a movable sampling sheet 1 and a sampling rope 2. The sampling vessel 5 has a accommodating chamber 51, a liquid inlet 52 and a liquid discharge port 53, and the liquid inlet 52 and the liquid discharge port 53 are respectively connected to the accommodating chamber 51. The connecting frame 3 is connected and arranged above the sampling vessel 5. The movable sampling sheet 1 is arranged in the accommodating chamber 51 and is located at the liquid discharge port 53. One end of the sampling rope 2 is connected to the movable sampling sheet 1, and the other end of the sampling rope 2 extends from the accommodating chamber 51 and is connected to the side wall of the connecting frame 3. When the liquid discharge port 53 is discharged, the sampling rope 2 is suitable for controlling the movable sampling sheet 1 to move away from the liquid discharge port 53 under the pulling action.

[0043] The present invention simplifies and mechanizes the sampling operation by designing a special sampling device, reduces the chance of direct manual contact with chemicals, thereby greatly reducing the risks of acid and alkali splash injuries, respiratory tract irritation, etc., and improves the safety of the sampling process.

[0044] The present invention does not pull the sampling rope 2 during sampling, and the movable sampling piece 1 blocks the drainage port 53 under the gravity of the solution in the sampling vessel 5, thereby preventing leakage of the sample solution after the sample solution is collected. When the sample solution is collected and transferred to the sampling bottle, the sampling rope 2 is pulled to lift the movable sampling piece 1, and the sample solution flows out from the drainage port 53, achieving the purpose of sampling without direct contact with chemicals, avoiding pollution of chemicals, and avoiding or reducing personal safety risks such as acid-base corrosion and respiratory irritation.

[0045] The sampling device of the present invention is compact in design and easy to operate, and can quickly complete the sampling task, reducing the time and complexity of manual operation. In particular, in the case of large-scale sampling or frequent sampling, this efficient working method can significantly improve work efficiency and reduce labor costs.

[0046] The above solution sampling device is not only suitable for the sampling and acceptance of nuclear power tank car solutions, but can also be used in other sampling occasions, such as chemical, pharmaceutical and other industries. Its flexibility and adaptability make it have a wider application prospect.

[0047] In some embodiments, the sampling vessel 5, the connecting frame 3, the movable sampling piece 1 and the sampling rope 2 are all made of corrosion-resistant materials to prevent corrosion damage to the sampling device by chemicals.

[0048] In some embodiments, the connecting frame 3 is a telescopic connecting frame, and the connecting frame 3 includes a fixed rod 31 and a telescopic rod 32. The fixed rod 31 is arranged on the sampling vessel 5 and extends upward from the sampling vessel 5, and a telescopic slot is vertically arranged on the top of the fixed rod 31. The telescopic rod 32 is inserted and arranged in the telescopic slot and can be telescoped along the direction of the telescopic slot. The telescopic rod 32 is fixed to the fixed rod 31 by a fixing structure, and a scale is arranged on the telescopic rod 32, and the scale is suitable for indicating the placement position of the sampling vessel 5.

[0049] In this embodiment, the telescopic rod is retracted into the telescopic slot when not in use, making the sampling device more convenient to store, saving storage space, and making it more convenient to carry and use.

[0050] Tank trucks are generally high, and the telescopic rod 32 can be extended and retracted at will. The setting of the telescopic rod 32 can also realize telescopic sampling, and realize sampling of different depth areas of the tank truck solution. The scale on the telescopic rod 32 clearly indicates the value, and the position of the sampling vessel 5 in the solution container can be accurately detected, ensuring that each sampling can accurately reach the designated position, meeting the national standard requirements for tank truck sampling, and the collected samples are more comprehensive and representative. When the sampling depth exceeds the length of the sampling device before extension, the telescopic rod 32 is pulled out of the telescopic groove, and the telescopic rod and the device are marked with scales to clarify the specific depth value of the sampling, and the samples sampled in different areas are collected in the sampling bottle.

[0051] In some embodiments, a handle 4 is connected to the top of the telescopic rod 32. There is an angle between the handle 4 and the telescopic rod 32, and the handle 4 is suitable for human hand holding.

[0052] In some embodiments, the upper portion of the sampling vessel 5 is configured as a cylindrical tube, and the lower portion of the sampling vessel 5 is configured as a conical tube with an inner diameter gradually decreasing from top to bottom. The liquid inlet 52 is disposed at the top of the sampling vessel 5, and the liquid discharge port 53 is disposed at the bottom of the sampling vessel 5. The movable sampling sheet 1 is located above the liquid inlet 52, and the size of the movable sampling sheet 1 is larger than the size of the liquid inlet 52, so that the movable sampling sheet 1 can block the liquid discharge port 53 when it is located at the liquid discharge port 53.

[0053] In this embodiment, the lower part of the sampling vessel 5 is configured to be conical, and the movable sampling sheet 1 is located above the liquid inlet 52. When the movable sampling sheet 1 is lifted upward, a drainage gap is generated between the movable sampling sheet 1 and the wall surface of the lower part of the sampling vessel 5. The sample solution in the accommodating cavity 51 can flow from the drainage gap to the drainage port 53. The sample solution is discharged through the drainage port 53 with a pointed mouth at the bottom of the sampling vessel 5, thereby achieving the purpose of drainage and avoiding the risk of acid and alkali splashing caused by the pouring of the sample solution. When the movable sampling sheet 1 is not lifted, the movable sampling sheet 1 moves downward under the gravity of the sample solution in the accommodating cavity 51, and the drainage port 53 is blocked.

[0054] According to an embodiment of the present invention, in a second aspect, a solution sampling method is provided, wherein the method samples a solution by using a solution sampling device, and comprises the following steps:

[0055] S1. Based on the characteristics of the solution container, multiple sampling positions are set in the depth direction.

[0056] S2. Using the solution sampling device, the solution at each sampling position is sampled in turn. In step S2, the specific steps of sampling the solution at a certain sampling position are:

[0057] S21. Based on the depth information of the sampling position area, control the extension and retraction status of the connecting frame 3, hold the connecting frame 3 to place the sampling vessel 5 into the sampling position area of ​​the solution container; determine whether the sampling vessel 5 is in place by the scale on the side wall of the connecting frame 3.

[0058] S22. Collect the solution in the sampling position area through the sampling vessel 5.

[0059] S23. Hold the connecting frame 3, lift the sampling vessel 5 upward, and take the sampling vessel 5 out of the solution container.

[0060] S24. Place a sampling bottle under the sampling vessel 5, pull the sampling rope 2, and control the movable sampling piece 1 to lift up, so that the sample solution flows out from the bottom of the sampling vessel 5 into the sample bottle.

[0061] When performing step S24, part of the sample solution flows out from the bottom of the sampling vessel 5 into the sample bottle, and the sample solution is collected through the sample bottle.

[0062] After step S24, the remaining sample solution in the sampling vessel 5 is recovered into the acid-base waste liquid barrel to prevent the remaining sample solution from being discharged into the outside atmosphere and causing pollution to the outside environment.

[0063] The following uses the application of the solution sampling device in bulk chemical tank truck solution sampling as an example to explain the solution sampling method in detail.

[0064] When the sodium hydroxide tank truck solution for resin regeneration of the condensate polishing system enters the factory, the chemical personnel prepare the sampling device and the sampling bottle with the sample information label, wear acid and alkali resistant gloves, goggles, acid and alkali protective clothing, etc., and take protective measures. The tank truck storage tank is 1.8m high, and a sampling port is set on the top of the tank truck storage tank.

[0065] The first step is to hold the handle 4. At this time, there is no need to pull open the telescopic rod 32. Put the sampling device into the position 1 / 10 of the liquid surface, that is, the upper part of the container required by the national standard, and the scale shows 18cm. After the sampling vessel 5 collects the sample, hold the handle 4 to take out the entire sampling device. Place a sampling bottle under the sampling vessel 5. The bottom of the sampling vessel 5 has a movable sampling piece 1 connected to the sampling rope 2. Pull the sampling rope 2, the movable sampling piece 1 is lifted, and the sample solution flows out from the bottom of the sampling vessel 5 into the sample bottle. After collecting 30ml, put down the sampling rope 2, and recover the remaining sample solution in the sampling vessel 5 into the acid and alkali waste liquid barrel.

[0066] The second step is to hold the handle 4. At this time, there is still no need to pull open the telescopic rod 32. Put the sampling device into the position 3 / 10 of the distance from the liquid surface, that is, the middle part of the container required by the national standard. The scale of the device shows 54cm. After the sampling vessel 5 collects the sample solution, hold the handle 4 to take out the entire sampling device, and place the sampling bottle under the sampling vessel 5. There is a movable sampling piece 1 at the bottom of the sampling vessel 5 connected with the sampling rope 2. Pull the sampling rope 2, the movable sampling piece 1 is lifted, and the sample solution flows out from the bottom of the sampling vessel 5 into the sample bottle. After collecting 30ml, put down the sampling rope 2, and recover the remaining sample solution in the sampling vessel 5 into the acid and alkali waste liquid barrel.

[0067] The third step is to hold the handle 4, pull out the telescopic rod in the telescopic groove, and place the sampling device at 9 / 10 of the distance from the liquid surface, that is, the lower part of the container required by the national standard. The telescopic scale shows 162cm. After the sampling vessel 5 collects the sample solution, hold the handle 4 to take out the entire sampling device, and place the sampling bottle under the sampling vessel 5. There is a movable sampling piece 1 at the bottom of the sampling vessel 5 connected with the sampling rope 2. Pull the sampling rope 2, the movable sampling piece 1 is lifted, and the sample solution flows out from the bottom of the sampling vessel 5 into the sample bottle. After collecting 30ml, put down the sampling rope 2, and recover the remaining sample solution in the sampling vessel 5 into the acid and alkali waste liquid barrel.

[0068] After the sampling process is completed, the sample bottles are brought back to the laboratory for main component content analysis and impurity analysis.

[0069] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A solution sampling device, characterized in that: include: A sampling vessel (5), the sampling vessel (5) comprising a containing cavity (51), a liquid inlet (52) and a liquid discharge port (53), the liquid inlet (52) and the liquid discharge port (53) being respectively connected to the containing cavity (51); A connecting frame (3), wherein the connecting frame (3) is connected and arranged above the sampling vessel (5); A movable sampling piece (1), wherein the movable sampling piece (1) is arranged in the accommodating cavity (51) and is located at the position of the liquid discharge port (53); A sampling rope (2), one end of which is connected to the movable sampling piece (1), and the other end of which extends from the accommodating cavity (51) and is connected to the side wall of the connecting frame (3); when the liquid discharge port (53) is draining, the sampling rope (2) is suitable for controlling the movable sampling piece (1) to move away from the liquid discharge port (53) under the pulling action.

2. The solution sampling device according to claim 1, characterized in that: The connecting frame (3) is a telescopic connecting frame, and the connecting frame (3) comprises: A fixing rod (31), the fixing rod (31) being arranged on the sampling vessel (5) and extending upward from the sampling vessel (5), and a telescopic slot being vertically arranged at the top end of the fixing rod (31); A telescopic rod (32) is inserted into the telescopic slot and can be telescoped along the direction of the telescopic slot. The telescopic rod (32) is fixed to the fixed rod (31) via a fixing structure. A scale is provided on the telescopic rod (32), and the scale is suitable for indicating the placement position of the sampling vessel (5).

3. The solution sampling device according to claim 2, characterized in that: The top end of the telescopic rod (32) is connected to a handle (4), an angle is formed between the handle (4) and the telescopic rod (32), and the handle (4) is suitable for being held by a human hand.

4. The solution sampling device according to claim 1, characterized in that: The movable sampling piece (1) is located above the liquid inlet (52), and the size of the movable sampling piece (1) is larger than the size of the liquid inlet (52), so that the movable sampling piece (1) can block the liquid discharge port (53) when it is located at the liquid discharge port (53).

5. The solution sampling device according to claim 1, characterized in that: The upper portion of the sampling vessel (5) is arranged in a cylindrical shape, and the lower portion of the sampling vessel (5) is arranged in a conical shape with an inner diameter gradually decreasing from top to bottom; the liquid inlet (52) is arranged at the top end of the sampling vessel (5), and the liquid outlet (53) is arranged at the bottom end of the sampling vessel (5).

6. The solution sampling device according to any one of claims 1 to 5, characterized in that: The solution sampling device is used for sampling solutions in bulk chemical tank trucks.

7. The solution sampling device according to claim 6, characterized in that: The sampling vessel (5), the connecting frame (3), the movable sampling piece (1) and the sampling rope (2) are all made of corrosion-resistant materials.

8. A solution sampling method, characterized in that: The method samples the solution by using the solution sampling device according to any one of claims 1 to 7, comprising the following steps: S1. Based on the characteristics of the solution container, multiple sampling positions are set in the depth direction; S2. Use the solution sampling device described in any one of claims 1 to 7 to sample the solution at each sampling position respectively.

9. The solution sampling method according to claim 8, characterized in that: In step S2, the specific steps of sampling the solution at a certain sampling position are: S21. Based on the depth information of the sampling position area, the telescopic state of the connecting frame (3) is controlled, and the connecting frame (3) is held to place the sampling vessel (5) in the sampling position area of ​​the solution container; and the scale on the side wall of the connecting frame (3) is used to determine whether the sampling vessel (5) is placed in place; S22. Collect the solution in the sampling position area through the sampling vessel (5); S23. Holding the connecting frame (3), lift the sampling vessel (5) upward, and remove the sampling vessel (5) from the solution container; S24. Place a sampling bottle under the sampling vessel (5), pull the sampling rope (2), and control the movable sampling piece (1) to lift up, so that the sample solution flows out from the bottom of the sampling vessel (5) into the sample bottle.

10. The solution sampling method according to claim 9, characterized in that: When performing step S24, part of the sample solution flows out from the bottom of the sampling vessel (5) into the sample bottle; After step S24, the remaining sample solution in the sampling vessel (5) is recovered into the acid-base waste liquid barrel.

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