Sampling device for environmental analysis

Abstract

The utility model relates to the field of equipment for environmental engineering analysis, in particular to an environmental analysis sampling device, which comprises a sampling seat and a collecting pipe, a sampling groove with an upward opening is arranged on the top surface of the sampling seat, a sample receiving platform is arranged at a high position in the sampling groove, and a water outlet nozzle is mounted in the center of the sample receiving platform. According to the utility model, the sampling pipe can be retained in a water body at a measuring point, and only the sampling seat needs to be fixed on the land, so that good repeatability of the measuring point can be ensured, and the process that the sampling pipe needs to be put down and the sampling device needs to be carried during each sampling is avoided. As a measuring point is anchored, a water sample can be pumped up to complete sampling only by pressing a collecting pipe into a sampling groove and starting a booster pump and a valve during sampling each time, and the sampling process is convenient and rapid. The collecting pipe is provided with a one-way valve to avoid water sample leakage in the subsequent carrying process.

Description

Technical Field

[0001] The utility model relates to the field of environmental engineering analysis equipment, in particular to an environmental analysis sampling device. Background Art

[0002] In environmental water pollution prevention and control projects, it is necessary to sample and analyze water quality to obtain the degree of pollution and pollutants. At present, water sampling mainly relies on automatic sampling devices. The sampling tube is sent to a suitable horizontal distance by a mechanical arm or a cylinder, a motor and other devices, and then lowered into the water body. The water sample is then pumped into the sampling tube by a pump body, and then the sampling tube is raised to the ground and recovered to obtain the water sample. However, water body detection requires sampling at the same measuring point for multiple time periods to observe changes in the degree of pollution or the effect of water purification. The above-mentioned existing device needs to lower the sampling tube each time it takes a sample, which increases the single sampling time, and each sampling requires the device to be transported to the measuring point. The transportation pressure is large and it is difficult to repeat the initial measuring point more accurately. Utility Model Content

[0003] The purpose of this application is to provide an environmental analysis sampling device, aiming to solve the problems in the prior art.

[0004] The embodiment of the present application provides an environmental analysis sampling device, including a sampling seat and a collection tube, wherein the top surface of the sampling seat is provided with a sampling slot open upward, a sample receiving platform is provided at a high position in the sampling slot, and a water outlet is installed at the center of the sample receiving platform;

[0005] A first connecting tube is fixed below the water outlet, a second connecting tube is fixedly connected to the lower end of the first connecting tube, the first connecting tube and the second connecting tube are both slidably connected in the sampling seat, the second connecting tube is connected to the inside of the first connecting tube, the outer diameter of the second connecting tube is smaller than the outer diameter of the first connecting tube so that a step is formed between the second connecting tube and the first connecting tube; a third connecting tube is slidably connected below the second connecting tube, the third connecting tube is fixed in the sampling seat, an inverted T-shaped plug is fixed to the lower end of the second connecting tube, an inlet is provided on the top of the third connecting tube, the plug extends into the third connecting tube through the inlet and the plug limits the inlet; a first spring is sleeved on the outside of the second connecting tube between the first connecting tube and the third connecting tube; a water inlet hole is provided on the side wall of the second connecting tube above the plug;

[0006] The lower end of the third connecting tube is connected to an extension tube, the lower end of the extension tube is connected to the sampling tube, valves are installed at both ends of the sampling tube, and the side wall of the sampling tube is connected to an exhaust pipe and a boosting pipe. The exhaust pipe is located at the upper part of the sampling tube, the exhaust pipe is connected to the exhaust pump, the boosting pipe is located at the lower part of the sampling tube, and the boosting pipe is connected to the boosting pump.

[0007] Furthermore, the top surface of the water outlet is in an upwardly convex arc shape, and a water outlet hole is provided at a non-vertex position.

[0008] Furthermore, the outer diameter of the sample receiving platform is larger than the outer diameter of the collection tube.

[0009] Furthermore, the collection tube includes a tube body, the lower end of which is meshedly connected with a tube cover, the lower end of the tube cover is provided with an alignment groove corresponding to the water outlet, a one-way valve is installed in the alignment groove, and the alignment groove is connected to the tube body through the one-way valve.

[0010] Furthermore, the one-way valve includes a valve stem and a valve core installed in a cross shape; the inner top of the alignment groove is arc-shaped, and the valve stem is movably connected at the apex of the arc, and the lower end of the valve stem extends into the alignment groove; a water outlet hole is provided at the inner top of the alignment groove corresponding to the water outlet position, and a valve cavity is provided in the pipe cover above the water outlet hole, and the inner diameter of the valve cavity is larger than the diameter of the valve core, and the valve core moves up and down in the valve cavity; an upper water hole is provided above the valve cavity, and the valve cavity is connected with the pipe body through the upper water hole; a second spring is sleeved on the valve stem between the inner top of the valve cavity and the valve core, and when the second spring is in the initial state, the valve core top seals the water outlet hole.

[0011] Furthermore, a wall is provided on the periphery of the sampling slot, the height of the wall is greater than the height of the sample receiving platform, and the diameter of the wall is greater than the diameter of the collection tube.

[0012] The beneficial effect of the utility model is that the utility model can retain the sampling tube in the water body at the measuring point, and only needs to fix the sampling seat on land, thereby ensuring good repeatability of the measuring point and avoiding the process of lowering the sampling tube and carrying the sampling device every time for sampling. Since the measuring point is anchored, each time sampling is performed, it is only necessary to carry the collection tube and press it in the sampling slot, start the booster pump and the valve to pump the water sample up to complete the sampling, and the sampling process is convenient and fast. The collection tube is equipped with a one-way valve to prevent water sample leakage during subsequent transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the overall structure diagram of the utility model.

[0014] Figure 2 This is the overall structural diagram of the push sampling structure.

[0015] Figure 3 This is a structural diagram of the collection tube.

[0016] In the figure:

[0017] 1. Sampling seat; 2. Tube body; 3. Sampling slot; 4. Sample receiving platform; 5. Water outlet; 6. Wall; 7. First connecting pipe; 8. Second connecting pipe; 9. Third connecting pipe; 10. Plug; 11. First spring; 12. Water inlet hole; 13. Water outlet hole; 14. Pipe cover; 15. Alignment slot; 16. Valve stem; 17. Valve core; 18. Downhole hole; 19. Valve cavity; 20. Uphole hole; 21. Second spring; 22. Extension tube; 23. Sampling tube; 24. Valve; 25. Vacuum pipe; 26. Booster pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-Figure 3 The environmental analysis sampling device shown in FIG. 1 includes a sampling seat 1 and a collection tube. Figure 1 As shown, the top surface of the sampling seat 1 is provided with a sampling slot 3 which is open upward, and a sample receiving platform 4 is provided at a high position in the sampling slot 3. A water outlet 5 is installed at the center of the sample receiving platform 4, and the water outlet 5 protrudes from the sample receiving platform 4. Among them, the outer diameter of the sample receiving platform 4 is larger than the outer diameter of the collection tube, so that the sample receiving platform 4 can receive the collection tube. A wall 6 is provided on the periphery of the sampling slot 3, and the height of the wall 6 is larger than the height of the sample receiving platform 4, and the diameter of the wall 6 is larger than the diameter of the collection tube. The sample receiving platform 4 is surrounded by the wall 6 to prevent the sample receiving platform 4 from being accidentally touched, and the sample receiving range can be clearly indicated.

[0020] The sampling seat 1 is provided with a push sampling structure, which includes a water outlet 5, a sample receiving platform 4, a first connecting pipe 7, a second connecting pipe 8, a third connecting pipe 9 and a first spring 11. Figure 2As shown, a first connecting pipe 7 is fixed below the water outlet 5, and a second connecting pipe 8 is fixedly connected to the lower end of the first connecting pipe 7. Both the first connecting pipe 7 and the second connecting pipe 8 are slidably connected in the sampling seat 1, and the second connecting pipe 8 is connected to the inside of the first connecting pipe 7. The outer diameter of the second connecting pipe 8 is smaller than the outer diameter of the first connecting pipe 7, so that a step is formed between the second connecting pipe 8 and the first connecting pipe 7; a third connecting pipe 9 is slidably connected below the second connecting pipe 8, and the third connecting pipe 9 is fixed in the sampling seat 1. A plug 10 in an inverted T shape is fixed to the lower end of the second connecting pipe 8, and an inlet is opened at the top of the third connecting pipe 9, and the upper diameter of the plug 10 is the same as the diameter of the second connecting pipe 8, and the upper diameter of the plug 10 matches the inner diameter of the inlet, and the plug 10 extends into the third connecting pipe 9 through the inlet and the plug 10 limits the inlet; a first spring 11 is sleeved on the outside of the second connecting pipe 8 between the first connecting pipe 7 and the third connecting pipe 9; a water inlet hole 12 is opened on the side wall of the second connecting pipe 8 above the plug 10.

[0021] The water outlet 5, the first connecting tube 7 and the second connecting tube 8 are internally connected and fixed together to form an active group of a push-to-pick sampling structure. In the initial state of the first spring 11, the water inlet 12 is located outside the third connecting tube 9, so that the third connecting tube 9 cannot be connected to the second connecting tube 8. The active group is pressed downward by the sample receiving platform 4, so that the water inlet 12 moves downward to enter the third connecting tube 9. At this time, the third connecting tube 9 is connected to the second connecting tube 8 through the water inlet 12. The water sample can be pumped into the second connecting tube 8 by pressurization and further released from the water outlet 5. In this process, the first spring 11 is compressed. When the pressing force is cancelled, the first spring 11 recovers its deformation to make the active group automatically rebound to the initial state. The plug 10 is used to limit the rebound process.

[0022] The top surface of the water outlet 5 is in an upwardly convex arc shape, and a water outlet hole 13 is provided at a non-vertex position.

[0023] The collection tube used is as follows Figure 3 As shown, it includes a tube body 2, the lower end of the tube body 2 is meshed and connected with a tube cover 14, and the lower end of the tube cover 14 is provided with an alignment groove 15 corresponding to the water outlet 5, and a one-way valve is installed in the alignment groove 15, and the alignment groove 15 is connected with the tube body 2 through the one-way valve. Pressing the sampling tube on the sample receiving platform 4, and the water outlet 5 is located in the alignment groove 15, it is convenient to align the sampling tube with the water outlet 5, and pressing the sampling tube downward, the water outlet 5 releases the water sample and enters the tube body 2 through the one-way valve. The one-way valve can prevent the water sample in the collection tube from flowing out. When the water sample needs to be taken out, the tube cover 14 can be screwed off from the tube body 2.

[0024] In this embodiment, the one-way valve includes a valve stem 16 and a valve core 17 installed in a cross shape. Figure 3As shown; the inner top of the alignment groove 15 is in an arc shape, and the valve stem 16 is movably connected at the apex of the arc, and the lower end of the valve stem 16 extends into the alignment groove 15; a water outlet hole 18 is provided at the inner top of the alignment groove 15 corresponding to the position of the water outlet hole 13, and a valve cavity 19 is provided in the pipe cover 14 above the water outlet hole 18, and the inner diameter of the valve cavity 19 is larger than the diameter of the valve core 17, and the valve core 17 moves up and down in the valve cavity 19; an upper water hole 20 is provided above the valve cavity 19, and the valve cavity 19 is connected with the collection pipe through the upper water hole 20; a second spring 21 is sleeved on the valve stem 16 between the inner top of the valve cavity 19 and the valve core 17, and when the second spring 21 is in the initial state, the valve core 17 seals the water outlet hole 18.

[0025] When the collection tube is pressed downward, the water outlet 5 can push the valve stem 16 upward, so that the valve core 17 moves upward to expose the lower water hole 18, thereby connecting the alignment groove 15 with the valve cavity 19 and the upper water hole 20, so that the water sample can enter the collection tube. In this process, the second spring 21 is compressed. When the pressing state is released, the second spring 21 recovers its deformation and presses the valve core 17 against the lower water hole 18, so that the lower water hole 18 is disconnected from the valve cavity 19.

[0026] Therefore, the collection tube will only open when it is pressed against the water outlet 5, thereby facilitating the collection of water samples and preventing leakage. In order to further enhance the seal, a sealing gasket can be installed between the water outlet 5 and the alignment groove 15 to prevent the water sample from flowing downward from the alignment groove 15 when filling the collection tube.

[0027] like Figure 1 As shown, the lower end of the third connecting tube 9 is connected to an extension tube 22, the lower end of the extension tube 22 is connected to a sampling tube 23, valves 24 are installed at both upper and lower ends of the sampling tube 23, and the side wall of the sampling tube 23 is connected to an exhaust pipe 25 and a boosting pipe 26, the exhaust pipe 25 is located at the upper part of the sampling tube 23, the exhaust pipe 25 is connected to the exhaust pump, the boosting pipe 26 is located at the lower part of the sampling tube 23, and the boosting pipe 26 is connected to the boosting pump.

[0028] When in use, the length of the extension tube 22 is adjusted according to the sampling height or depth, so that the sampling tube 23 enters the water. When sampling, the upper valve 24 is closed and the lower valve 24 is opened, and only the air pump is started to draw the water sample into the sampling tube 23. Then, the air pump and the lower valve 24 are closed, and the upper valve 24 and the booster pump are opened to increase the pressure at the bottom of the sampling tube 23 so that the water sample is pumped upward into the extension tube and the third connecting tube 9.

[0029] The upper valve 24, the lower valve 24, the air pump and the booster pump are electrically linked to realize the process of automatic sample suction and sample loading of the sampling tube 23. When the sampling mechanism is started and the booster pump and the upper valve 24 are opened, the water sample can be pumped upward from the sampling tube 23 into the sampling tube.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An environmental analysis sampling device, characterized in that: It includes a sampling seat and a collection tube. The top surface of the sampling seat is provided with a sampling slot open upwards. A sample receiving platform is provided at a high position in the sampling slot. A water outlet is installed at the center of the sample receiving platform. A first connecting tube is fixed below the water outlet, a second connecting tube is fixedly connected to the lower end of the first connecting tube, the first connecting tube and the second connecting tube are both slidably connected in the sampling seat, the second connecting tube is connected to the inside of the first connecting tube, the outer diameter of the second connecting tube is smaller than the outer diameter of the first connecting tube so that a step is formed between the second connecting tube and the first connecting tube; a third connecting tube is slidably connected below the second connecting tube, the third connecting tube is fixed in the sampling seat, an inverted T-shaped plug is fixed to the lower end of the second connecting tube, an inlet is provided on the top of the third connecting tube, the plug extends into the third connecting tube through the inlet and the plug limits the inlet; a first spring is sleeved on the outside of the second connecting tube between the first connecting tube and the third connecting tube; a water inlet hole is provided on the side wall of the second connecting tube above the plug; The lower end of the third connecting tube is connected to an extension tube, the lower end of the extension tube is connected to the sampling tube, valves are installed at both ends of the sampling tube, and the side wall of the sampling tube is connected to an exhaust pipe and a boosting pipe. The exhaust pipe is located at the upper part of the sampling tube, the exhaust pipe is connected to the exhaust pump, the boosting pipe is located at the lower part of the sampling tube, and the boosting pipe is connected to the boosting pump.

2. The environmental analysis sampling device according to claim 1, characterized in that: The top surface of the water outlet nozzle is in an upwardly convex arc shape, and a water outlet hole is opened at a non-vertex position.

3. The environmental analysis sampling device according to claim 2, characterized in that: The outer diameter of the sample receiving platform is greater than the outer diameter of the collection tube.

4. The environmental analysis sampling device according to claim 3, characterized in that: The collection tube comprises a tube body, the lower end of which is meshedly connected with a tube cover, the lower end of the tube cover is provided with an alignment groove corresponding to the water outlet, a one-way valve is installed in the alignment groove, and the alignment groove is connected with the tube body through the one-way valve.

5. The environmental analysis sampling device according to claim 4, characterized in that: The one-way valve includes a valve stem and a valve core installed in a cross shape; the inner top of the alignment groove is in an arc shape, and the valve stem is movably connected at the apex of the arc, and the lower end of the valve stem extends into the alignment groove; a water outlet hole is provided at the inner top of the alignment groove corresponding to the water outlet position, and a valve cavity is provided in the pipe cover above the water outlet hole, and the inner diameter of the valve cavity is larger than the diameter of the valve core, and the valve core moves up and down in the valve cavity; an upper water hole is provided above the valve cavity, and the valve cavity is connected with the pipe body through the upper water hole; a second spring is sleeved on the valve stem between the inner top of the valve cavity and the valve core, and when the second spring is in the initial state, the valve core top seals the water outlet hole.

6. The environmental analysis sampling device according to claim 1, characterized in that: The outer periphery of the sampling trough is provided with a wall, the height of the wall is greater than the height of the sample receiving platform, and the diameter of the wall is greater than the diameter of the collection tube.

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