Samplers and detection systems

Abstract

The utility model provides a sampler and a detection system. The sampler is used in a liquid and includes: a water inlet, which allows the liquid to be detected to enter the sampler from the outside; a water pump, which sucks the liquid to be detected into the sampler through the water inlet; a sampling inlet, through which the liquid to be detected can enter a sample container that can be loaded and unloaded; a drain, which allows the liquid to be detected to be discharged from the sampler to the outside; a switching valve, which can switch between two connected states: the water inlet is connected to the sampling inlet and the water inlet is connected to the drain; a control system, which receives instructions and controls the work of the water pump and the switching valve; and a sealed warehouse, wherein the water pump, the switching valve, and the control system are built into the sealed warehouse, and the water inlet, the drain, and the sampling inlet are opened in the sealed warehouse. By connecting the water inlet with the drain before sampling, self-cleaning is achieved, and sampling is performed by connecting the water inlet with the sampling inlet to ensure sampling accuracy.

Description

Technical Field

[0001] The utility model relates to a sampler and a detection system. Background Art

[0002] In the hydrological and water quality detection technology, there are situations where samplers sample water in urban rivers, estuaries and coasts, drinking water treatment systems, domestic water systems, domestic sewage systems, industrial water systems, industrial sewage systems, aquaculture, etc. as needed, so as to detect the hydrological and water quality.

[0003] When a sampler is used to collect samples in water, there is a situation where there are many impurities in the water, which may cause the sampler to become clogged. In view of this situation, in Patent Document 1, water is repeatedly pumped and drained by rotating the motor forward and reversely, thereby solving the problem of clogging of the sampler.

[0004] Prior art literature

[0005] Patent Document 1: China Utility Model Patent Authorization Announcement No. CN216349746U Utility Model Content

[0006] Problems to be solved by utility models

[0007] Although the above-mentioned Patent Document 1 addresses the situation where impurities exist in water, repeated pumping and draining as described in Patent Document 1 will result in residues of the sample collected last time, causing contamination to the sampled sample. In order to solve this problem, the present utility model provides a sampler and a detection system, which can achieve self-cleaning and sampling to ensure the accuracy of sampling.

[0008] Solutions for solving problems

[0009] A technical solution of the utility model provides a sampler, which is used in a liquid and comprises: a water inlet, which allows the liquid to be detected to enter the sampler from the outside; a water pump, which sucks the liquid to be detected into the sampler through the water inlet; a sampling inlet, through which the liquid to be detected can enter a sample container that can be loaded and unloaded; a drain, which allows the liquid to be detected to be discharged from the sampler to the outside; a switching valve, through which the switching valve can be switched between two connection states: the water inlet is connected to the sampling inlet and the water inlet is connected to the drain; a control system, which receives instructions to control the operation of the water pump and the switching valve; and a sealed chamber, wherein the water pump, the switching valve, and the control system are built in the sealed chamber, and the water inlet, the drain, and the sampling inlet are opened in the sealed chamber.

[0010] Preferably, the water inlet and the drain are constructed as follows: the water inlet and the drain are both arranged on the side wall of the sealed warehouse body, and when looking down at the sealed warehouse body, the water inlet and the drain are respectively located on different sides of the sealed warehouse body, or one of the water inlet and the drain is arranged on the side wall, and the other is arranged on the bottom wall of the sealed warehouse body, or both the water inlet and the drain are arranged on the bottom wall of the sealed warehouse body, and the distance between the water inlet and the drain is more than half of the distance between the two farthest points on the bottom wall of the sealed warehouse body.

[0011] Preferably, the sampler also has an exhaust port, a one-way valve is provided at the exhaust port, the one-way valve is connected to the sample container, allowing the gas in the sample container to be discharged to the outside through the exhaust port, and not allowing external gas or the liquid to be detected to enter the sample container through the exhaust port; and / or an electrical connection port is provided at the upper part of the sealed chamber body, and a cable is sealingly connected to the electrical connection port, thereby supplying power to the sampler.

[0012] Preferably, the sampler further comprises a connecting pipeline, one end of which is connected to the water inlet, and the other end of which extends in a direction away from the sealed chamber body.

[0013] Preferably, the other end of the connecting pipeline is open upward; and / or a filter assembly is installed at the other end of the connecting pipeline.

[0014] Preferably, the sampler also includes an air duct, one end of which is connected to the one-way valve, and the other end of which opens in the sample container and extends to the bottom of the sample container; one end of the sampling inlet is connected to the switching valve, and the other end of the sampling inlet opens in the sample container, and the air duct is constructed such that after the sample container is removed from the sampler, the other end of the air duct can be connected to the other end of the sampling inlet.

[0015] Another technical solution of the utility model provides a detection system, comprising: at least one of the above-mentioned samplers; and a water quality detection device, which is used in a liquid together with the sampler and has a sensor for detecting the liquid to be detected, wherein the water quality detection device has a detection chamber, the probe of the sensor is located in the detection chamber, and the water inlet of the sampler is connected to the detection chamber.

[0016] Preferably, the water quality testing equipment includes a controller, and the controller of the water quality testing equipment is connected to the control system signal of the sampler in a manner capable of sending instructions, and / or the detection system also includes an ammonia nitrogen detection device, and the ammonia nitrogen detection device is located inside the water quality testing equipment or is external to the water quality testing equipment.

[0017] Preferably, a cleaning brush assembly is provided in the detection chamber, and the cleaning brush assembly includes: a sensor scraping brush for cleaning the probe of the sensor; and a brush for cleaning the water inlet or the end of the connecting pipe connected to the water inlet away from the water inlet; and / or, the detection chamber has a lower end opening for the liquid to be detected to enter and exit the detection chamber through the lower end opening, and the side wall of the detection chamber is provided with at least one filter hole, and the filter hole is located above the detection area of ​​the probe in the up and down direction.

[0018] Preferably, the sampler and the water quality detection device are arranged with a spacer between them, and the sampler and the water quality detection device are surrounded by a connecting belt. There are recesses on the side of the sampler close to the water quality detection device and on the side away from the water quality detection device. The spacer is embedded in the recess on the side of the sampler close to the water quality detection device, and the connecting belt is embedded in the recess on the side of the sampler away from the water quality detection device.

[0019] Effect of utility model

[0020] According to the utility model, a sampler and a detection system can be provided. The sampler can achieve self-cleaning by connecting the water inlet with the drain before sampling, and then achieve sampling by connecting the water inlet with the sampling inlet to ensure the accuracy of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view showing the internal structure of a detection system according to one embodiment of the present application.

[0022] Figure 2 It is a cross-sectional view showing the internal structure of the sampler.

[0023] Figure 3 : is a schematic diagram showing the structure of the cleaning brush assembly.

[0024] Figure 4 It is a schematic diagram showing the structure of the filter assembly.

[0025] Figure 5 This is a schematic diagram showing a structure in which an air duct and a water pump pipe are connected.

[0026] Figure 6This is a schematic diagram of the sample container after it is sealed.

[0027] Figure 7 This is a three-dimensional view of the water quality detection sampling system viewed from the bottom.

[0028] Figure 8 It is a stereogram of the sampler.

[0029] Fig. 9 This is a stereogram of the sampler from another perspective.

[0030] Fig.10 It is a schematic diagram showing the positional relationship between the water inlet and the drain outlet.

[0031] Fig.11 It is a schematic diagram showing the positional relationship between the water inlet and the drain outlet in the case of sealed silos with different shapes.

[0032] Fig.12 It is a schematic diagram showing the positional relationship between the water inlet and the drain outlet in the case of sealed silos with different shapes.

[0033] Description of Reference Numerals

[0034] 1. Sample container; 2. Cable; 3. Sealed chamber; 4. Switching valve; 5. Control system; 6. Water pump; 7. Pipeline assembly; 8. Filter assembly; 81. Filter; 82. Pressure cover; 83. Grid seat; 9. Cleaning brush assembly; 91. Sensor scraper brush; 92. Brush; 10. Detection chamber; 11. Detection sensor; 12. Air guide tube; 13. One-way valve; 14. Sampling inlet; 15. Sample container seal; 16. Sensor Device bin; 17, lower end opening; 18, filter hole; 19, spacer; 20, connecting belt; 21, mounting portion; 22, through hole; 31, water inlet; 32, drain outlet; 33, exhaust outlet; 34, electrical connection port; 71, connecting pipe; 72-74, connector; L1-L4, pipeline; 100, sampler; 110, water quality testing equipment; 301, bin cover; 302, bin body; 303, bin bottom. DETAILED DESCRIPTION

[0035] The present application is described below based on the drawings. The structure of the present application is not limited to the following description and drawings, and the structure of the present application can be arbitrarily changed and combined as long as it is within the scope of the present application.

[0036] <Schematic Structure of Sampler 100>

[0037] exist Figure 1-2 In FIG. 1 , a sampler 100 of the present application is shown. Figure 1The detection system is illustrated in FIG. 1 , and the detection system includes a sampler 100 and a water quality detection device 110 . The description of the detection system is given later. Figure 1 , Figure 2 A description is given for the sampler.

[0038] The sampler 100 is used in a liquid to be detected, such as Figure 1 As shown, the sampler 100 has: a sample container 1, which stores water (as an example of a liquid to be detected, but not limited to water), and through the sampling action of the sampler 100, water can be sampled into the sample container 1; and a sealed chamber 3, which has a space inside, for the water pump 6, the switching valve 4, the control system 5 and the pipeline assembly 7 described later to be built into the sealed chamber 3. A cable 2 is connected to the sealed chamber 3, and the cable 2 can be connected to an external power source, and power can be supplied to the sampler 100 from the external power source via the cable 2. In a non-limiting example, the cable 2 can be connected to the same power source as the water quality detection device 110. In another non-limiting example, the cable 2 can be connected to the power source (e.g., a battery) of the water quality detection device 110.

[0039] <Specific structure of the sealed chamber 3>

[0040] like Figure 2 As shown, the sealed bin body 3 includes: a bin body main body 302, which is cylindrical with upper and lower ends opened and has a space inside; a bin body cover 301, which is fixed to the upper end of the bin body main body 302 from above and seals the upper end opening of the bin body main body 302; and a bin body bottom 303, which is fixed to the bin body main body 302 from below and seals the lower end opening of the bin body main body 302. The method of fixing the bin body cover 301 and the bin body bottom 303 to the bin body main body 302 is not limited, such as Figure 8 As shown, for example, the bin cover 301 can be connected to the upper end of the bin body 302 in a liquid-tight manner, and then the bin cover 301 can be fastened to the bin body 302 using screws. The fixing method for the bin bottom 303 is the same.

[0041] like Figure 2 As shown, the sealed warehouse body 3 is provided with a water inlet 31, a water outlet 32 ​​and a sampling inlet 14. The water inlet 31 and the water outlet 32 ​​are formed at the bottom of the sealed warehouse body 3 (specifically, at the warehouse body bottom 303). The sampling inlet 14 is formed at the top of the sealed warehouse body (specifically, at the warehouse body cover 301).

[0042] Regarding the positional relationship between the water inlet 31 and the water outlet 32, it is preferred that the water inlet 31 and the water outlet 32 ​​are located on different sides of the sealed chamber body 3, preferably on opposite sides, and particularly preferably on opposite sides in the diameter direction.

[0043] based on Fig.10For explanation. Fig.10 , the positional relationship between the water inlet 31 and the drain outlet 32 ​​when looking up at the bottom 303 of the sealed silo 3 is shown, that is, Fig.10 FIG. 3 shows a diagram of the water inlet 31 and the drain outlet 32 ​​projected on the bottom 303 of the silo. The water inlet 31 is located at Fig.10 At the rightmost position in the sampler 100, when an imaginary line O is drawn that bisects the bottom 303 of the sealed bin 3 in the left-right direction, the drain port 32 is set in the range between positions W1 and W3 on the left side of the imaginary line O (on a side different from the water inlet 31), and positions W1 and W3 are the positions where the imaginary line O intersects with the bottom 303 of the sealed bin 3. In this way, it is possible to prevent the water discharged from the drain port 32 from entering the sampler 100 again from the water inlet 31, thereby ensuring the accuracy of sampling. Preferably, the drain port 32 is located near the position W2, which is the position farthest from the water inlet 31 in the horizontal plane, that is, the drain port 32 is located on the opposite side of the water inlet 31. More preferably, the drain port 32 is located at the position W2, that is, when the water inlet 31 is at the rightmost position, the drain port 32 is at the position W2 which is the leftmost position. The line between the drain port 32 at the position W2 and the water inlet 31 is the diameter of the bottom 303 of the sealed bin 3 (refer to Figure 8 and Fig. 9 The positional relationship between the water inlet 31 and the water outlet 32 ​​is shown in FIG.

[0044] The above is based on Fig.10 The horizontal positional relationship between the water inlet 31 and the drain 32 is shown, but the water inlet 31 and the drain 32 are not limited to being located in the same horizontal plane, that is, the water inlet 31 and the drain 32 can be at different heights. In addition, the above describes the situation where the water inlet 31 is at the rightmost position, but it does not mean that the water inlet 31 is located at the rightmost position of the sealed bin body 3 when the sampler 100 is observed from the front. The water inlet 31 can be located at any position on the side wall of the sealed bin body 3. When determining the position of the drain 32, the water inlet 31 of the sealed bin body 3 can be directed to the rightmost side, and then the position of the drain 32 can be determined.

[0045] Figure 8 , Fig. 9 The figure shows that the water inlet 31 and the drain outlet 32 ​​are located on the side wall of the sealed chamber body 3, but the water inlet 31 and the drain outlet 32 ​​may also be located on the bottom wall of the sealed chamber body 3, for example, one of the water inlet 31 and the drain outlet 32 ​​may be located on the side wall and the other may be located on the bottom wall. Fig.10 The position relationship in the Fig.10The positional relationship in the sampler 100 is that, when one of the water inlet 31 and the drain port 32 is located on the side wall and the other is located on the bottom wall, it is also possible that both the water inlet 31 and the drain port 32 are located on one side of the sealed chamber 3 (for example, both are located on the left side). Since one opens toward the side and the other opens toward the bottom, the water inlet 31 and the drain port 32 are also located on different sides, which can also prevent the water discharged from the drain port 32 from entering the sampler 100 again from the water inlet 31 to a certain extent. Of course, it is preferred that when the water inlet 31 is set on the side wall, when the water inlet 31 (the one set on the side wall) is in the rightmost position, the drain port 32 is set on the bottom wall on the left side relative to the imaginary line O, thereby further avoiding the interference of water inlet and drain between the water inlet 31 and the drain port 32.

[0046] In addition, when both the water inlet 31 and the drain outlet 32 ​​are located on the bottom wall, it is preferred that the distance between the water inlet 31 and the drain outlet 32 ​​is more than half of the longest distance in the bottom 303 (bottom wall) of the sealed tank body 3 (the distance between the two points on the bottom wall that are farthest apart). For example, when the top view shape of the tank body bottom 303 is circular, the longest distance in the tank body bottom 303 is the diameter of the circle, and when the top view shape of the tank body bottom 303 is rectangular, the longest distance in the tank body bottom 303 is the length of the diagonal of the rectangle. In short, the positional relationship between the water inlet 31 and the drain outlet 32 ​​is set in such a way that the water discharged from the drain outlet 32 ​​will not be sucked into the water inlet 31 again.

[0047] In addition, the shape of the sealed chamber body 3 is not limited to a cylindrical shape, but may also be a square column shape. Fig.11 As shown, when the shape of the sealed warehouse body 3 is rectangular when viewed from above, and the water inlet 31 is located at the rightmost end, the drain port 32 is provided on a side of the sealed warehouse body 3 different from the water inlet 31, such as the upper side (e.g., position W1, position W4), the lower side (e.g., position W3, position W5) and the left side (position W2). Preferably, the drain port 32 is provided on the side of the sealed warehouse body 3 opposite to the water inlet 31, that is, at a position on the left side relative to the axis O (position W1, position W2, position W3). More preferably, it is located at position W2, that is, relative to the water inlet 31 located at the rightmost end, the drain port 32 is located at the leftmost end.

[0048] The shape of the sealed chamber body 3 may also be a triangle when viewed from above, such as Fig.12 As shown, when the water inlet 31 is located on one side of the triangle, the water outlet 32 ​​is located on different sides (position W4, position W5).

[0049] Of course, the shape of the sealed chamber body 3 is not limited to the above-mentioned shapes, and may also be various shapes such as pentagon, hexagon, ellipse, star, etc. when viewed from above. In addition, when the direction of the water flow can be predetermined, it is preferred that the water discharged from the drain port 32 is arranged in such a way that the water does not pass through the water inlet 31 under the action of the water flow.

[0050] <Connecting pipe 71>

[0051] The connecting pipe 71 is a component inserted into the water inlet 31. Figure 2 The figure shows a structure in which one end of the connecting pipe 71 is inserted into the water inlet 31. Specifically, one end (insertion end 712) of the connecting pipe 71 is inserted into the water inlet 31, and the connecting pipe 71 extends horizontally from the water inlet 31, so that the other end of the connecting pipe 71 extends in a direction away from the sealed chamber body 3, and bends upward to become a water inlet end 711, and the water inlet end 711 is connected to the filter assembly 8 described later.

[0052] By inserting the connecting pipe 71 into the water inlet 31 opened on the side wall of the sealed warehouse body 3, the actual water inlet (the location of the filter assembly 8) can be extended to the outer space of the sealed warehouse body 3, thereby being able to freely adjust the position and orientation of the water inlet as needed. However, the connecting pipe 71 may not be provided. In the case of having the connecting pipe 71, after the water is filtered through the filter assembly 8, it enters the water inlet 31 from the water inlet end 711 through the connecting pipe 71. In the case of not having the connecting pipe 71, the filter assembly 8 can be directly set at the water inlet 31, and the water used as the sampling object can also be filtered.

[0053] <Internal Pipeline of Sampler 100>

[0054] like Figure 2As shown, there is a connector 72 on the downstream side of the water inlet 31, and the connector 72 connects the pipeline L1 with the water inlet 31. The pipeline L1 is used to connect the water inlet 31 with the water pump 6. The water inlet 31 is an opening opened in the sealed chamber, and the water as the liquid to be detected enters the sampler 100 from the outside. The water pump 6 provides power to suck water from the outside into the sampler 100 through the water inlet 31. The downstream side of the water pump 6 is connected with a pipeline L2, and the pipeline L2 is used to connect the water pump 6 with the switching valve 4. The switching valve 4 has a water inlet O, a water outlet A and a water outlet B. The pipeline L2 is connected to the water inlet O of the switching valve 4. The switching valve 4 can switch between the following two states: the state where the water inlet O is connected to the water outlet A and the water inlet O is not connected to the water outlet B (i.e., the state where the water inlet 31 is connected to the drain port 32), and the state where the water inlet O is connected to the water outlet B and the water inlet O is not connected to the water outlet A (i.e., the state where the water inlet 31 is connected to the sampling inlet 14). There is no particular limitation on the means for achieving the switching. For example, the switching valve 4 can be a two-position three-way solenoid valve, or two valves can be provided on the three-way structure to control the connection state of the three-way structure.

[0055] like Figure 2 As shown, the water outlet B of the switching valve 4 is connected to the connector 74 via the pipeline L3, and the connector 74 is connected to one end of the sampling inlet 14, that is, the water flowing out of the water outlet B can flow to the connector 74 via the pipeline L3, and then flow out through the sampling inlet 14. Figure 1 and Figure 2 As shown, the sample container 1 is screwed upside down on the chamber cover 301 with the container opening facing downward, so that the other end of the sampling inlet 14 is located in the container opening of the sample container 1, so that water flowing out of the sampling inlet 14 can be stored in the sample container 1.

[0056] like Figure 2 As shown, the water outlet A of the switching valve 4 is connected to the connector 73 via the pipeline L4, and the connector 73 is connected to the drain port 32, that is, the water flowing out from the water outlet A can flow to the connector 73 via the pipeline L4, and then through the drain port 32, the water is discharged from the sampler 100 to the outside.

[0057] like Figure 1 As shown, the control system 5 is connected to the water pump 6 and the switching valve 4 so as to be able to control the operation of the water pump 6 and the operation of the switching valve 4 . The control system 5 is also connected to the cable 2 so as to be able to be supplied with power from the cable 2 .

[0058] <Sampling Operation of Sampler 100>

[0059] The following is an explanation of the working condition of the sampler 100, which starts working based on the control of the control system 5. As described above, the switching valve 4 can switch between the two states of connection between the water inlet O and the water outlet A and connection between the water inlet O and the water outlet B, wherein, in the normal state, the water inlet O is connected to the water outlet A, and the water inlet O is not connected to the water outlet B. When the control system 5 receives the sampling instruction, it controls the water pump 6 to work, pumping water so that water is sucked in from the water inlet 31, and the sucked water enters the water inlet O of the switching valve 4 through the water pump 6, and flows from the water outlet A to the connector 73, and further flows to the drain 32, thereby, the entire path from the water inlet 31 to the drain 32 can be cleaned, thereby improving the accuracy of sampling.

[0060] After a certain amount of water is discharged from the drain outlet 32, or after a certain period of time, the control system 5 operates the switching valve 4 to switch the water inlet O to a state in which the water outlet B is connected and the water inlet O is not connected to the water outlet A. Then the control system 5 operates the water pump 6 to pump water so that water is sucked in from the water inlet 31. The sucked water enters the water inlet O of the switching valve 4 through the water pump 6, and flows from the water outlet B to the connecting piece 74, and further flows to the sampling inlet 14, thereby collecting the water into the sample container 1.

[0061] like Figure 2 As shown, an exhaust port 33 and an electrical connection port 34 are formed on the chamber cover 301, and a one-way valve 13 is provided on the exhaust port 33, and the exhaust port 33 is connected to one end of the air guide tube 12 via the one-way valve 13. The other end of the air guide tube 12 extends to the bottom of the sample container 1 and opens in the sample container 1, and a cable 2 is sealedly connected to the electrical connection port 34, so that power can be provided to the control system 5 without being affected by liquid. Figure 2 The one-way valve 13 shown in the figure is connected to the sample container 1, allowing the gas in the sample container 1 to be discharged to the outside through the exhaust port 33, and not allowing external gas or water to enter the sample container 1 through the exhaust port 33. Therefore, as water is introduced into the sample container 1 from the sampling inlet 14, the gas inside the sample container 1 can be discharged from the exhaust port 33 to the outside of the sampler 100 through the air guide tube 12 and the one-way valve 13. Since the air guide tube 12 extends to the bottom of the sample container 1, even the gas at the bottom of the sample container 1 can be discharged. Therefore, water can be sampled until the water fills the bottom of the sample container 1, thereby filling the sample container 1. After the sampling work is completed, the switching valve 4 is switched to a state where the water inlet O and the water outlet A are connected, and the water pump 6 stops working.

[0062] <Processing after sampling>

[0063] like Figure 5As shown, the air duct 12 is constructed as follows: after the sample container 1 is removed from the sampler 100, the other end of the air duct 12 (the end extending to the bottom of the sample container 1) can be connected to the other end of the sampling inlet 14 (the end located in the container opening of the sample container 1).

[0064] After the sampling work of the sampler 100 is completed, the sampling path is cleaned and the sample container is replaced. After one sampling is completed, the sample can be taken away, and the sampling path is cleaned and a new sample container is replaced. The process is as follows:

[0065] A. Turn the sampler 100 upside down;

[0066] B. Unscrew the sample container 1, and screw the sample container seal 15 (such as a disposable bottle cap) onto the bottle mouth to complete the sample sealing. Figure 6 The sealed sample container 1 shown;

[0067] C. Place the sampler 100 upright, as shown in Figure 5 As shown, the other end of the air guide tube 12 is connected to the other end of the sampling inlet 14;

[0068] D. Immerse the filter assembly 8 in the cleaning solvent, trigger the sampling command multiple times, and the water pump pumps the cleaning agent into the sampling passage;

[0069] E. Immerse the filter assembly 8 in pure water, trigger the sampling command multiple times, and the water pump pumps pure water into the sampling passage;

[0070] F. Disconnect the air guide tube 12 from the sampling inlet 14 and install a new sample container 1 to the interface of the sampler 100 .

[0071] Based on the above steps, the cleaning of the pipeline and the replacement of the sample container 1 are completed. In the above steps D and E, the cleaning solvent / pure water is not only pumped into the passage from the water inlet 31 to the sampling inlet 14, but also pumped into the passage from the water inlet 31 to the drain port 32, thereby completing the cleaning of all passages of the sampler 100.

[0072] <Structure of filter assembly 8>

[0073] like Figure 2 As shown, a filter assembly 8 is installed at the water inlet end 711 of the connecting pipe 71. Figure 4The structure of the filter assembly 8 is shown in the figure, and the filter assembly 8 includes a filter 81, a pressure cap 82 and a mesh seat 83. The mesh seat 83 has a through hole for water to flow through. By placing the filter 81 on the mesh seat 83 in a manner of covering the through hole of the mesh seat 83, the water flowing through the filter assembly 8 passes through the filter 81, so that the filter 81 is used to filter out impurities in the water. In addition, the pressure cap 82 is fixed to the mesh seat 83 by threaded fastening or snap fastening, so that the pressure cap 82 can be used to press the filter 81 and fix the filter 81 to the mesh seat 83, thereby forming the filter assembly 8. The filter assembly 8 is assembled to the connecting pipe 71 by connecting the water inlet end 711 and the mesh seat 83 together.

[0074] <Effects of Sampler 100>

[0075] In the above sampler 100, there are two internal pipelines, one is connected from the water inlet 31 to the sampling inlet 14 to realize the sampling function, and the other is connected from the water inlet 31 to the drain outlet 32 ​​to realize the self-cleaning function, thereby avoiding contamination of the sample during sampling and improving the accuracy of sampling. And after completing a sampling, before replacing a new sample container 1, by connecting the air guide tube 12 to the sampling inlet 14, the sampling path can be thoroughly cleaned to prevent the residue of the previous sample from contaminating the system.

[0076] The water inlet 31 and the drain port 32 can be arranged on the side wall or the bottom wall of the sealed chamber body 3. Preferably, when both the water inlet 31 and the drain port 32 are arranged on the side wall or one is arranged on the side wall and the other is arranged on the bottom wall, the water inlet 31 is located at the side closest to the sealed chamber body 3 in a specific direction (for example, Fig.10 When the water inlet 31 and the water outlet 32 ​​are both arranged on the bottom wall, the distance between the water inlet 31 and the water outlet 32 ​​is more than half of the longest distance in the bottom 303 (bottom wall) of the sealed warehouse 3. Thus, it is possible to prevent the water discharged from the water outlet 32 ​​from being sucked into the water inlet 31 again.

[0077] Since the air guide tube 12 extends to the bottom of the sample container 1 , all the gas in the sample container 1 can be smoothly discharged, and the sample container 1 can be filled with water.

[0078] In addition, the sampler 100 of the present application can be used in conjunction with various water quality testing equipment and has good versatility.

[0079] The above is a description of the structure and effect of the sampler 100. Figure 1 and Figure 7 The detection system is described below. The detection system includes a sampler 100 and a water quality detection device 110 .

[0080] <Schematic Structure of Water Quality Testing Equipment 110>

[0081] The water quality testing device 110 is used together with the sampler 100 in a liquid, such as Figure 1 As shown, the water quality detection equipment 110 includes: a sensor compartment 16, which is used to accommodate a detection sensor 11, and an opening is formed in the sensor compartment 16, so that the probe of the detection sensor 11 can extend to the outside of the sensor compartment 16; a detection compartment 10, which is located below the sensor compartment 16 and connected to the sensor compartment 16, and the detection compartment 10 has an opening at a position corresponding to the opening of the sensor compartment 16, so that the probe of the detection sensor 11 in the sensor compartment 16 can extend downward into the detection compartment 10 through the openings of the sensor compartment 16 and the detection compartment 10; and a cleaning brush assembly 9, which is located in the detection compartment 10, including a sensor scraping brush 91 and a brush 92, the sensor scraping brush 91 is used to clean the probe of the detection sensor 11 to prevent impurities in the water from adhering to the probe of the detection sensor 11 and causing a decrease in detection accuracy, and the brush 92 is used to clean the water inlet 31, or clean the other end of the connecting pipe 71 connected to the water inlet 31, to prevent impurities in the water from clogging the water inlet. When a filter assembly 8 is provided at the water inlet 31 or the other end of the connecting pipe 71 , the brush 92 cleans the filter 81 of the filter assembly 8 to prevent impurities in the water from adhering to the filter 81 , thereby increasing the service life of the filter assembly 8 .

[0082] Preferably, if Figure 3 As shown, Figure 3 The dotted line in the figure is the central axis of rotation, so that the cleaning brush assembly 9 rotates around Figure 3 The dotted line in is rotated, such as Figure 1 As shown, a depression for the sensor scraping brush 91 to pass through is provided in the detection sensor 11, so that the probe of the detection sensor 11 is provided in the depression. Thus, only one power source is provided for the cleaning brush assembly 9, and the probe of the detection sensor 11 and the filter 81 of the filter assembly 8 can be cleaned simultaneously by driving the cleaning brush assembly 9. The power source of the cleaning brush assembly 9 can be provided inside the sensor compartment 16. The cleaning brush assembly 9 can be cleaned before each operation of the water pump 6, or it can be cleaned at predetermined intervals.

[0083] The sensor 11 may include various sensors such as a water quality detection sensor and a liquid level sensor as required.

[0084] <Specific structure of the detection chamber 10>

[0085] The detection chamber 10 is a chamber body that provides a stable environment for the liquid to be detected. Figure 1 and Figure 7As shown, the detection chamber 10 is cylindrical and has a filter hole 18 on its side wall. For example, there are a plurality of filter holes 18, which are arranged at predetermined intervals along the circumferential direction, and water can enter and exit the detection chamber 10 through the filter holes 18. The filter holes 18 are located above the detection area of ​​the probe of the detection sensor 11 in the up-down direction, thereby facilitating the water entering from the filter holes 18 to flow through the test area of ​​the probe.

[0086] like Figure 7 As shown, the detection chamber 10 has a lower opening 17 at the bottom, so that water can enter and exit the detection chamber 10 through the lower opening 17. Such a structural setting can reduce the number of filter holes 18, and at least one filter hole can be set. The filter hole is used to block impurities with a particle size larger than the average particle size of impurities in the liquid. By setting the filter hole, the service life of the detection chamber 10 can be extended, and the number of operation and maintenance times can be reduced by reducing the number of filter holes.

[0087] In addition, the inspection chamber 10 also has a mounting portion 21 at the bottom for the filter assembly 8 to be mounted on the mounting portion 21 . The mounting portion 21 has a through hole 22 for the connecting pipe 71 to pass through, so that the water inlet end 711 of the connecting pipe 71 can be connected to the filter assembly 8 .

[0088] The detection system may also include an ammonia nitrogen detection device, which is located inside the water quality detection device 110, for example, it may be arranged in the sensor compartment 16, and the detection probe is extended to the inside of the detection compartment 10. However, it is not limited to this, the ammonia nitrogen detection device may also be arranged outside the water quality detection device 110, in which case the detection probe is also located outside the water quality detection device 110. The ammonia nitrogen detection device is used to detect the ammonia nitrogen concentration in water.

[0089] <Fixed Structure of Sampler 100 and Water Quality Testing Equipment 110>

[0090] like Figure 8 and Fig. 9 As shown, the outer wall of the sealed chamber 3 of the sampler 100 has a recess 23, which is formed continuously throughout the entire circumference. In the figure, two upper and lower recesses 23 are formed, but the recess 23 is not limited to two, and may have only one or more than three. In addition, the recess 23 may not be formed continuously throughout the entire circumference, and may be formed at least on one side of the sampler 100 close to the water quality detection device 110 and one side away from the water quality detection device 110.

[0091] When the sampler 100 and the water quality testing device 110 are fixed together, as shown in FIG. Figure 7As shown, one end (insertion end 712) of the connecting pipe 71 is inserted into the water inlet 31, and then the other end (water inlet end 711) of the connecting pipe 71 passes through the through hole 22 of the mounting portion 21 and is engaged with the filter assembly 8, thereby making the actual water inlet of the sampler 100 (where the filter assembly 8 is located) located inside the detection chamber 10.

[0092] If there is no connecting pipe 71, the position of the detection chamber 10 and / or the position of the water inlet 31 can be adjusted so that the water inlet 31 opens in the detection chamber 10 and is directly connected to the detection chamber 10. However, it is preferred to have a connecting pipe 71 because the connecting pipe 71 can make the actual water inlet more reliably located in the detection chamber 10 and closer to the detection sensor 11, and can also facilitate the installation of the filter assembly 8 and the cleaning brush assembly 9 to clean it.

[0093] In addition, if Figure 7 As shown, the sampler 100 and the water quality detection device 110 are arranged with a spacer 19 therebetween, and the spacer 19 has a convex portion corresponding to the concave portion 23, so that the convex portion is embedded in the concave portion 23 on the side of the sampler 100 close to the water quality detection device 110. On this basis, the sampler 100 and the water quality detection device 110 are surrounded and fixed together by a connecting belt 20, and the connecting belt 20 is embedded in the concave portion 23 on the side of the sampler 100 away from the water quality detection device 110, thereby, the connecting belt 20 can be kept in the concave portion 23 without being easily moved, so that the sampler 100 and the water quality detection device 110 can be stably held. In addition, by arranging the sampler 100 and the water quality detection device 110 with the spacer 19 therebetween, it is possible to avoid direct contact between the sampler 100 and the water quality detection device 110 and causing damage, and the connecting belt 20 can be tightened based on the spacer 19, which helps to fix the sampler 100 and the water quality detection device 110 together using the connecting belt 20.

[0094] <Effect of the detection system>

[0095] Since the water inlet of the sampler 100 opens in the detection chamber 10, the sampler 100 can work in coordination with the water quality detection device 110, especially the water inlet of the sampler 100 and the probe of the water quality detection device 110 are both located in the detection chamber 10. Preferably, the water inlet of the sampler 100 and the probe of the water quality detection device 110 are in a close position at the same height. Therefore, when the water quality detection device 110 detects pollution, the sampler 100 is immediately triggered to sample. The water sampled by the sampler 100 and the water detected to be polluted by the water quality detection device 110 are both the same batch of water in the detection chamber 10, which can realize real-time monitoring and sample retention of water quality, and ensure the consistency of the water samples taken in time and space.

[0096] As a means of achieving the coordinated work of the sampler 100 and the water quality detection device 110, the controller of the water quality detection device 110 can be connected by signal to the control system 5 of the sampler 100. When the water quality detection device 110 detects an abnormality, the controller of the water quality detection device 110 sends an instruction to the control system 5 of the sampler 100, so that the control system 5 of the sampler 100 receives the sampling instruction. In addition, it is also possible not to connect the controller of the water quality detection device 110 with the control system 5 of the sampler 100 by signal, but the controller of the water quality detection device 110 and the control system 5 of the sampler 100 are both connected by signal to the host computer. When the water quality detection device 110 detects pollution, the detection result is uploaded to the host computer, and the host computer automatically sends a sampling instruction to the control system 5 of the sampler 100, or the host computer sends a reminder to the operator, and the operator manually sends a sampling instruction.

Claims

1. A sampler, characterized in that: The sampler is used in a liquid and comprises: A water inlet, which is used for the liquid to be detected to enter the sampler from the outside; A water pump, which draws the liquid to be detected into the sampler through the water inlet; A sampling inlet, through which the liquid to be detected can enter a sample container that can be loaded and unloaded; A drain port, the drain port is used for the liquid to be detected to be discharged from the sampler to the outside; A switching valve, through which the water inlet can be switched between two connection states: the water inlet is connected to the sampling inlet and the water inlet is connected to the drain outlet; A control system, which receives instructions and controls the operation of the water pump and the switching valve; and A sealed warehouse body, the water pump, the switching valve, and the control system are built in the sealed warehouse body, and the water inlet, the drain outlet, and the sampling inlet are opened in the sealed warehouse body.

2. The sampler according to claim 1, characterized in that: The water inlet and the drain outlet are constituted as follows: The water inlet and the drain outlet are both arranged on the side wall of the sealed warehouse body, and when the sealed warehouse body is viewed from above, the water inlet and the drain outlet are respectively located on different sides of the sealed warehouse body, or One of the water inlet and the water outlet is arranged on the side wall, and the other is arranged on the bottom wall of the sealed chamber body, or The water inlet and the drain outlet are both arranged on the bottom wall of the sealed warehouse body, and the distance between the water inlet and the drain outlet is more than half of the distance between the two farthest points on the bottom wall of the sealed warehouse body.

3. The sampler according to claim 1, characterized in that: The sampler also has an exhaust port, on which a one-way valve is arranged, the one-way valve is communicated with the sample container, allowing the gas in the sample container to be discharged to the outside through the exhaust port, and not allowing external gas or the liquid to be detected to enter the sample container through the exhaust port; and / or An electrical connection port is provided at the upper portion of the sealed chamber body, and a cable is sealedly connected to the electrical connection port to supply power to the sampler.

4. The sampler according to any one of claims 1 to 3, characterized in that: The sampler also includes a connecting pipeline. One end of the connecting pipeline is connected to the water inlet, and the other end of the connecting pipeline extends in a direction away from the sealing chamber body.

5. The sampler according to claim 4, characterized in that: The other end of the connecting pipeline opens upward; and / or, A filter assembly is installed at the other end of the connecting pipeline.

6. The sampler according to claim 3, characterized in that: The sampler also includes an air guide tube, One end of the air guide tube is connected to the one-way valve, and the other end of the air guide tube opens in the sample container and extends to the bottom of the sample container; One end of the sampling inlet is connected to the switching valve, and the other end of the sampling inlet opens in the sample container. The air guide tube is configured such that, after the sample container is removed from the sampler, the other end of the air guide tube can be connected to the other end of the sampling inlet.

7. A detection system, characterized in that: include: At least one sampler according to any one of claims 1 to 6; as well as A water quality detection device, used together with the sampler in a liquid, has a sensor for detecting the liquid to be detected, The water quality detection equipment has a detection chamber, the probe of the sensor is located in the detection chamber, and the water inlet of the sampler is connected to the detection chamber.

8. The detection system according to claim 7, characterized in that: The water quality detection device comprises a controller, the controller of the water quality detection device is connected to the control system signal of the sampler in a manner capable of sending instructions, and / or, The detection system also includes an ammonia nitrogen detection device, which is located inside the water quality detection equipment or is externally arranged on the water quality detection equipment.

9. The detection system according to claim 7, characterized in that: A cleaning brush assembly is arranged in the detection chamber, and the cleaning brush assembly includes: a sensor scraping brush for cleaning the probe of the sensor; and a brush for cleaning the water inlet or the end of the connecting pipe connected to the water inlet away from the water inlet; and / or, The detection chamber has a lower opening for the liquid to be detected to enter and exit the detection chamber through the lower opening. The side wall of the detection chamber is provided with at least one filter hole, and the filter hole is located above the detection area of ​​the probe in the up and down direction.

10. The detection system according to any one of claims 7 to 9, characterized in that: The sampler and the water quality detection device are arranged in an arranged manner with a spacer therebetween, and the sampler and the water quality detection device are surrounded by a connecting belt. The sampler has a concave portion on one side close to the water quality detection device and on one side away from the water quality detection device. The spacer is embedded in a recessed portion of the sampler on a side close to the water quality detection device, and the connecting belt is embedded in a recessed portion of the sampler on a side away from the water quality detection device.

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