A layered sampling device for wastewater detection

Abstract

This application relates to a stratified sampling device for wastewater testing, belonging to the field of wastewater testing and sampling equipment. It includes a sampling bottle with an open lower end and a suction stopper shell installed inside. The suction stopper shell is slidably connected to the sampling bottle in a sealed manner. A double-sealing rod assembly is installed at the upper end of the suction stopper shell, and a guide frame is installed on the lower end face of the suction stopper shell. The guide frame is fixedly connected to the suction stopper shell. A movable push rod, fixed to the guide frame, is slidably installed on the outer surface of the sampling bottle. Through the synergistic action of its components, this application can accurately sample wastewater at specific depths. Furthermore, the sampling bottle can be quickly closed after sampling, preventing the mixing of wastewater from different depths and greatly improving the accuracy of the test results.

Description

Technical Field

[0001] This application relates to the technical field of wastewater testing and sampling equipment, and in particular to a stratified sampling device for wastewater testing. Background Technology

[0002] The demand for water pollutant analysis in wastewater testing is increasing, especially with stricter regulations on industrial wastewater discharge, requiring precise monitoring of pollutant concentrations at different depths. Traditional sampling methods often employ single-depth sampling or mixed sampling, which struggles to reflect the vertical distribution characteristics of pollutants. In recent years, with rising environmental standards, stratified sampling technology has become a research hotspot, primarily employing the following three types of samplers:

[0003] Manual stratified sampler: Sampling at different depths is achieved by manually adjusting the rope length. Its advantages are low cost, but the sampling accuracy is greatly affected by human factors and the efficiency is low.

[0004] Electric stratified sampler: It uses a motor to drive the sampling bottle to lift and lower, which can realize automated operation, but it depends on the power supply and has a complex structure and high maintenance cost.

[0005] Gravity-based stratified sampler: It uses gravity to trigger the opening and closing of the sampling bottle. It has a simple structure but cannot accurately control the sampling depth and is easily affected by water flow.

[0006] Regarding the aforementioned technologies, it has been found that existing sampling equipment cannot achieve high-precision stratified sampling. In addition, traditional water-filled sampling methods are not easy to close quickly after sampling, are easily disturbed by water flow, causing sample disorder, and have poor adaptability to different water environments. Utility Model Content

[0007] To achieve efficient and accurate sampling, this application provides a stratified sampling device for wastewater testing.

[0008] The stratified sampling device for wastewater testing provided in this application adopts the following technical solution:

[0009] A stratified sampling device for wastewater testing includes a sampling bottle with an open lower end and a suction stopper shell installed inside. The suction stopper shell is slidably connected to the sampling bottle in a sealed manner. A double sealing rod assembly is installed at the upper end of the suction stopper shell. A guide frame is installed on the lower end face of the suction stopper shell and is fixedly connected to the suction stopper shell. A movable push rod, fixed to the guide frame, is slidably installed on the outer side of the sampling bottle, and a main support spring is sleeved on the movable push rod. A locking frame with a limit on the movable push rod is also horizontally installed on the sampling bottle and is slidably connected to the sampling bottle. A secondary support spring is also installed between the locking frame and the sampling bottle. A pin frame for fixing the locking frame is also vertically installed on the sampling bottle. A sampling pull rope is installed on the pin frame, one end of which is fixedly connected to the pin frame, and the other end of which is fixedly connected to the sampling bottle.

[0010] By adopting the above technical solution, and through the coordinated action of the sampling bottle, suction stopper, double sealing rod assembly, guide base, movable push rod, main support spring, locking frame, secondary support spring, pin frame, and sampling pull rope, the stratified sampling function of wastewater is achieved. The sampling bottle is immersed in the wastewater using the sampling pull rope. The length of the sampling pull rope is measured in advance for placement, or a graduated rope is used for suspension to ensure better determination of the appropriate depth. Once the equipment is placed at the specific depth in the wastewater, pulling the sampling pull rope disengages the pin frame from the locking frame, releasing the locking frame from locking the movable push rod. Under the action of the main support spring, the movable push rod drives the suction stopper to slide upward, creating negative pressure inside the sampling bottle. This draws the wastewater from that depth layer into the sampling bottle, avoiding mixing of wastewater from different depth layers and ensuring sampling accuracy. At the same time, this structural design makes the equipment relatively simple to operate and convenient for use in actual testing.

[0011] Optionally, the sampling bottle includes a bottle body, a bottle nozzle, and an outer frame. The bottle nozzle is located on the upper surface of the bottle body and is integrally formed with the bottle body. The outer frame is fixedly installed on the outer side of the bottle body.

[0012] By adopting the above technical solution, the sampling bottle features a structure consisting of a bottle body, a nozzle, and an outer frame. The bottle body holds the wastewater sample, while the nozzle facilitates the subsequent pouring out of the sample for testing. The outer frame provides a sliding support for components such as the movable push rod, ensuring the relative positional relationship and stability of the movement between the various components of the equipment, thus enabling the entire stratified sampling process to proceed smoothly.

[0013] Optionally, the suction plug shell includes a main shell and a sealing ring. An annular groove for the pressure head is formed on the outer side of the main shell, and a weight block is placed in the main shell. The sealing ring is fixedly installed in the annular groove.

[0014] By adopting the above technical solution, an annular groove is opened on the outer side of the main shell of the suction stopper and a sealing ring is installed, which can effectively ensure the sealing performance between the suction stopper and the sampling bottle, prevent wastewater from leaking out of the gaps during sampling, and ensure the accuracy of sampling. Placing a weight block in the main shell can increase the weight of the suction stopper, so that the equipment can sink more stably to the specified depth when the wastewater is placed in it, thus improving the reliability of the equipment.

[0015] Optionally, the double sealing rod assembly includes a bottom sealing block, a narrow-diameter rod, and a top sealing cap. The bottom sealing block is fixedly installed on the upper end face of the main housing, the narrow-diameter rod is vertically fixed at the center of the upper end face of the narrow-diameter rod, and the top sealing cap is fixedly installed on the head of the narrow-diameter rod.

[0016] By adopting the above technical solution, the structural design of the bottom seal block, narrow-diameter rod, and top seal cap of the dual-seal rod assembly allows for better control of airflow and wastewater intake within the sampling bottle as the suction stopper slides upward. The bottom seal block can, to some extent, prevent wastewater from splashing upward, the narrow-diameter rod serves as a connector and guide, and the top seal cap quickly seals the bottle opening after sampling, preventing outside air from entering and ensuring sampling quality.

[0017] Optionally, the guide frame includes a cross-shaped central frame and an arc-shaped plate that fits onto the inner side of the bottle body. The arc-shaped plate is evenly installed on the outer side of the cross-shaped central frame and is integrally formed with the cross-shaped central frame.

[0018] By adopting the above technical solution, the cross-shaped frame and arc-shaped plate structure of the guide base, with the arc-shaped plate attached to the inner side of the bottle, can provide a good guiding effect for the sliding of the suction stopper, ensuring that the suction stopper slides smoothly in the sampling bottle and avoiding jamming or displacement, thereby ensuring the smooth progress of the sampling process and the accuracy of the sampling results.

[0019] Optionally, the movable push rod includes a sliding rod part, a middle plate part, and a connecting frame connected to the cross-shaped central frame. The sliding rod part is slidably mounted on the outer frame, the middle plate part is sleeved and fixed on the sliding rod part, and the connecting frame is fixedly mounted on the lower end of the sliding rod part.

[0020] By adopting the above technical solution, the design of the sliding rod section, the middle plate section, and the connecting frame of the movable push rod ensures the linearity and stability of the movable push rod's movement by allowing the sliding rod section to slide on the outer frame. The middle plate section can cooperate with the main support spring to ensure that the main support spring can better drive the movable push rod to move. The connecting frame connects the movable push rod to the guide base frame, enabling the movable push rod to accurately drive the suction plug shell to move, thereby achieving the suction of wastewater.

[0021] Optionally, the locking frame includes a bending frame and a lower baffle. The bending frame is horizontally installed on the outer frame and is slidably connected to the outer frame. The lower baffle is fixedly installed on the lower end face of the bending frame.

[0022] By adopting the above technical solution, the locking frame's bending frame and lower baffle structure are designed so that the bending frame is horizontally installed on the outer frame and can slide, while the lower baffle limits the movement of the movable push rod. When the sampling rope is not pulled, the locking frame is fixed by the pin bracket, restricting the movement of the movable push rod and ensuring that the equipment does not sample prematurely during wastewater introduction. When the sampling rope is pulled, the locking frame unlocks, allowing the movable push rod to move normally for sampling.

[0023] Optionally, the pin bracket includes a middle frame plate and a round pin shaft, the round pin shaft is fixedly installed at both ends of the middle frame plate, and the bending frame is provided with insertion holes corresponding to the round pin shaft.

[0024] By adopting the above technical solution, the middle frame plate and round pin structure of the pin holder, with the round pin engaging with the insertion hole on the bent frame, can accurately fix the position of the locking frame. Pulling the sampling rope disengages the round pin from the insertion hole, unlocking the locking frame. The operation is simple and convenient, ensuring that the equipment can sample at the appropriate time.

[0025] In summary, this application includes at least one of the following beneficial technical effects: Through the synergistic effect of its components, this application can accurately sample wastewater at specific depths, and the sampling bottle can be quickly closed after sampling, avoiding the mixing of wastewater from different depths and greatly improving the accuracy of the test results. Simultaneously, the sealing design of the suction plug, the guiding function of the guide frame, and the stable connection between the components ensure the reliability and stability of the equipment in wastewater environments, reduce the probability of malfunctions, and extend the service life of the equipment. Attached Figure Description

[0026] Figure 1 This is a perspective view of the overall structure in the embodiments of this application.

[0027] Figure 2 yes Figure 1 Front view of the device shown.

[0028] Figure 3 This is a perspective view of the sampling bottle, movable push rod, main support spring, locking frame, pin frame and sampling pull rope in combination in the embodiments of this application.

[0029] Figure 4 yes Figure 3 A magnified view of part A of the device shown.

[0030] Figure 5 This is a perspective view of the suction plug shell, double sealing rod assembly, and guide base frame in the embodiments of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Sampling bottle; 10. Secondary support spring; 11. Bottle body; 12. Bottle nozzle; 13. Outer frame; 2. Suction stopper shell; 21. Main shell; 22. Sealing ring; 3. Double sealing rod assembly; 31. Bottom sealing block; 32. Narrow diameter rod; 33. Top sealing cap; 4. Guide base frame; 41. Cross-shaped middle frame; 42. Arc plate; 5. Movable push rod; 51. Sliding rod part; 52. Middle plate part; 53. Connecting frame; 6. Main support spring; 7. Locking frame; 71. Bending frame; 72. Lower baffle; 8. Pin frame; 81. Middle frame plate; 82. Round pin shaft; 9. Sampling pull rope. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] This application discloses a stratified sampling device for wastewater testing. (Refer to...) Figure 1 , Figure 2 and Figure 3As shown, a stratified sampling device for wastewater testing includes a sampling bottle 1 with an open lower end. A suction stopper 2 is installed inside the sampling bottle 1, and the suction stopper 2 is slidably connected to the sampling bottle 1 in a sealed manner. A double-sealing rod assembly 3 is installed at the upper end of the suction stopper 2. A guide frame 4 is installed on the lower end face of the suction stopper 2, and the guide frame 4 is fixedly connected to the suction stopper 2. A movable push rod 5, fixed to the guide frame 4, is slidably installed on the outer surface of the sampling bottle 1. Furthermore, a main support spring 6 is fitted onto the movable push rod 5, and a locking frame 7 for limiting the movable push rod 5 is horizontally installed on the sampling bottle 1. The locking frame 7 is slidably connected to the sampling bottle 1, and a secondary support spring 10 is installed between the locking frame 7 and the sampling bottle 1. A pin frame 8 for fixing the locking frame 7 is vertically installed on the sampling bottle 1, and a sampling pull rope 9 is installed on the pin frame 8. One end of the sampling pull rope 9 is fixedly connected to the pin frame 8, and the other end is fixedly connected to the sampling bottle 1. Through the coordinated action of the sampling bottle 1, the suction plug shell 2, the double sealing rod assembly 3, the guide base frame 4, the movable push rod 5, the main support spring 6, the locking frame 7, the secondary support spring 10, the pin frame 8, and the sampling pull rope 9, the stratified sampling function of wastewater is realized. The sampling bottle 1 is immersed in wastewater using a sampling pull rope 9. The length of the sampling pull rope 9 is measured beforehand for placement, or a graduated rope can be used for suspension to ensure accurate depth determination. Once the device is submerged to the desired depth in the wastewater, pulling the sampling pull rope 9 disengages the pin bracket 8 from the locking bracket 7. The locking bracket 7 then releases its lock on the movable push rod 5. Under the action of the main support spring 6, the movable push rod 5 drives the suction plug shell 2 to slide upwards, creating a negative pressure inside the sampling bottle 1. This draws wastewater from that depth into the sampling bottle 1, preventing mixing of wastewater from different depths and ensuring sampling accuracy. This structural design also simplifies operation and facilitates use in actual testing. The sampling bottle 1 includes a bottle body 11, a nozzle 12, and an outer frame 13. The nozzle 12 is located on the upper surface of the bottle body 11 and is integrally formed with the bottle body 11. The outer frame 13 is fixedly installed on the outer surface of the bottle body 11. The sampling bottle 1 adopts a structural design consisting of a bottle body 11, a bottle nozzle 12, and an outer frame 13. The bottle body 11 is used to hold the wastewater sample, and the bottle nozzle 12 facilitates the subsequent pouring out of the sample for testing. The outer frame 13 provides a sliding support for components such as the movable push rod 5, ensuring the relative positional relationship and movement stability between the various components of the equipment, so that the entire stratified sampling process can proceed smoothly.

[0034] Reference Figure 2 and Figure 5As shown, the suction stopper 2 includes a main housing 21 and a sealing ring 22. An annular groove for the pressure head is formed on the outer surface of the main housing 21, and a weight is placed inside the main housing 21. The sealing ring 22 is fixedly installed in the annular groove. The annular groove and sealing ring 22 on the outer surface of the main housing 21 of the suction stopper 2 effectively ensure the sealing performance between the suction stopper 2 and the sampling bottle 1, preventing wastewater leakage from gaps during sampling and ensuring sampling accuracy. The weight placed inside the main housing 21 increases the weight of the suction stopper 2, allowing the device to sink more stably to the designated depth when wastewater is added, thus improving the reliability of the device.

[0035] Reference Figure 2 and Figure 5 As shown, the dual-sealing rod assembly 3 includes a bottom sealing block 31, a narrow-diameter rod 32, and a top sealing cap 33. The bottom sealing block 31 is fixedly installed on the upper end face of the main housing 21, the narrow-diameter rod 32 is vertically fixed at the center of its upper end face, and the top sealing cap 33 is fixedly installed on the head of the narrow-diameter rod 32. The structural design of the bottom sealing block 31, narrow-diameter rod 32, and top sealing cap 33 of the dual-sealing rod assembly 3 allows for better control of airflow and wastewater intake within the sampling bottle 1 when the suction stopper 2 slides upward. The bottom sealing block 31 can, to a certain extent, prevent wastewater from splashing upward, the narrow-diameter rod 32 serves as a connector and guide, and the top sealing cap 33 can quickly seal the bottle opening after sampling, preventing outside air from entering and ensuring the quality of the sampling.

[0036] Reference Figure 2 and Figure 5 As shown, the guide frame 4 includes a cross-shaped central frame 41 and an arc-shaped plate 42 that fits against the inner side of the bottle body 11. The arc-shaped plate 42 is evenly installed on the outer side of the cross-shaped central frame 41 and is integrally formed with the cross-shaped central frame 41. The structure of the cross-shaped central frame 41 and the arc-shaped plate 42 of the guide frame 4, with the arc-shaped plate 42 fitting against the inner side of the bottle body 11, provides good guidance for the sliding of the suction stopper 2, ensuring that the suction stopper 2 slides smoothly in the sampling bottle 1, avoiding jamming or displacement, thereby ensuring the smooth progress of the sampling process and the accuracy of the sampling results.

[0037] Reference Figure 2 and Figure 3As shown, the movable push rod 5 includes a sliding rod portion 51, a middle plate portion 52, and a connecting frame 53 connected to the cross-shaped central frame 41. The sliding rod portion 51 is slidably mounted on the outer frame 13, the middle plate portion 52 is sleeved and fixed on the sliding rod portion 51, and the connecting frame 53 is fixedly mounted on the lower end of the sliding rod portion 51. The design of the sliding rod portion 51, the middle plate portion 52, and the connecting frame 53 of the movable push rod 5 ensures the linearity and stability of the movement of the movable push rod 5 by allowing the sliding rod portion 51 to slide on the outer frame 13. The middle plate portion 52 can cooperate with the main support spring 6 to ensure that the main support spring 6 can better push the movable push rod 5 to move. The connecting frame 53 connects the movable push rod 5 to the guide base frame 4, enabling the movable push rod 5 to accurately drive the suction plug shell 2 to move, thereby realizing the suction of wastewater.

[0038] Reference Figure 2 and Figure 4 As shown, the locking frame 7 includes a bent frame 71 and a lower baffle 72. The bent frame 71 is horizontally mounted on the outer frame 13 and is slidably connected to the outer frame 13. The lower baffle 72 is fixedly mounted on the lower end face of the bent frame 71. The bent frame 71 is horizontally mounted on the outer frame 13 and can slide, while the lower baffle 72 limits the movement of the movable push rod 5. When the sampling rope 9 is not pulled, the locking frame 7 is fixed by the pin bracket 8, restricting the movement of the movable push rod 5 and ensuring that the equipment does not prematurely sample during wastewater introduction. When the sampling rope 9 is pulled, the locking frame 7 unlocks, allowing the movable push rod 5 to move normally for sampling.

[0039] Reference Figure 2 and Figure 4 As shown, the locking pin frame 8 includes a middle frame plate 81 and a round pin shaft 82. The round pin shaft 82 is fixedly installed at both ends of the middle frame plate 81, and the bending frame 71 has insertion holes corresponding to the round pin shaft 82. The structure of the middle frame plate 81 and the round pin shaft 82 of the locking pin frame 8, with the round pin shaft 82 cooperating with the insertion holes on the bending frame 71, can accurately fix the position of the locking frame 7. By pulling the sampling rope 9, the round pin shaft 82 is disengaged from the insertion hole, thereby unlocking the locking frame 7. The operation is simple and convenient, ensuring that the equipment can sample at the appropriate time.

[0040] The implementation principle of a stratified sampling device for wastewater testing according to an embodiment of this application is as follows: Before use, the device is slowly placed into the wastewater pool, and the sampling depth is determined as needed. During placement, the movable push rod 5 is limited because the locking frame 7 is fixed by the pin bracket 8, and the suction plug shell 2 will not slide downwards, so the device is in a ready state. When the device reaches the specified depth, pull the sampling rope 9 connected to one end of the pin bracket 8. The round pin shaft 82 of the pin bracket 8 disengages from the insertion hole of the bent frame 71, and the locking frame 7 moves outwards under the action of the secondary support spring 10, thereby unlocking the movable push rod 5. Under the action of the main support spring 6, the movable push rod 5 slides downwards, driving the guide base frame 4 and the suction plug shell 2 to slide downwards through the connecting frame 53, forming a negative pressure in the sampling bottle 1, and drawing the wastewater at that depth into the sampling bottle 1. After sampling is completed, the device can be removed from the wastewater.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A stratified sampling device for wastewater testing, comprising a sampling bottle (1), characterized in that: The sampling bottle (1) has an open structure at the bottom and a suction stopper shell (2) is installed inside the sampling bottle (1). The suction stopper shell (2) is slidably connected to the sampling bottle (1) and a double sealing rod assembly (3) is installed at the upper end of the suction stopper shell (2). A guide base frame (4) is installed on the lower end face of the suction stopper shell (2). The guide base frame (4) is fixedly connected to the suction stopper shell (2). A movable push rod (5) fixed to the guide base frame (4) is slidably installed on the outer side of the sampling bottle (1). A main support is sleeved on the movable push rod (5). The sampling bottle (1) is also horizontally provided with a locking frame (7) with a limit movable push rod (5), and the locking frame (7) is slidably connected to the sampling bottle (1). A secondary support spring (10) is also installed between the locking frame (7) and the sampling bottle (1). A pin frame (8) for fixing the locking frame (7) is also vertically installed on the sampling bottle (1). A sampling pull rope (9) is installed on the pin frame (8). One end of the sampling pull rope (9) is fixedly connected to the pin frame (8), and the other end of the sampling pull rope (9) is fixedly connected to the sampling bottle (1).

2. The stratified sampling device for wastewater testing according to claim 1, characterized in that: The sampling bottle (1) includes a bottle body (11), a bottle mouth (12) and an outer frame (13). The bottle mouth (12) is located on the upper surface of the bottle body (11) and is integrally formed with the bottle body (11). The outer frame (13) is fixedly installed on the outer side of the bottle body (11).

3. The stratified sampling device for wastewater testing according to claim 2, characterized in that: The suction plug shell (2) includes a main shell (21) and a sealing ring (22). An annular groove for the pressure head is opened on the outer side of the main shell (21), and a weight block is placed in the main shell (21). The sealing ring (22) is fixedly installed in the annular groove.

4. The stratified sampling device for wastewater testing according to claim 3, characterized in that: The double sealing rod assembly (3) includes a bottom sealing block (31), a thin diameter rod (32), and a top sealing cap (33). The bottom sealing block (31) is fixedly installed on the upper end face of the main housing (21). The thin diameter rod (32) is vertically fixed at the center of the upper end face of the thin diameter rod (32). The top sealing cap (33) is fixedly installed on the head of the thin diameter rod (32).

5. A stratified sampling device for wastewater testing according to claim 4, characterized in that: The guide frame (4) includes a cross-shaped frame (41) and an arc-shaped plate (42) attached to the inner side of the bottle body (11). The arc-shaped plate (42) is evenly installed on the outer side of the cross-shaped frame (41) and is integrally formed with the cross-shaped frame (41).

6. The stratified sampling device for wastewater testing according to claim 5, characterized in that: The movable push rod (5) includes a sliding rod part (51), a middle plate part (52) and a connecting frame (53) connected to the cross frame (41). The sliding rod part (51) is slidably installed on the outer frame (13), the middle plate part (52) is sleeved and fixed on the sliding rod part (51), and the connecting frame (53) is fixedly installed on the lower end of the sliding rod part (51).

7. A stratified sampling device for wastewater testing according to claim 6, characterized in that: The locking frame (7) includes a bending frame (71) and a lower baffle (72). The bending frame (71) is horizontally installed on the outer frame (13) and the bending frame (71) is slidably connected to the outer frame (13). The lower baffle (72) is fixedly installed on the lower end face of the bending frame (71).

8. A stratified sampling device for wastewater testing according to claim 7, characterized in that: The pin bracket (8) includes a middle frame plate (81) and a round pin shaft (82). The round pin shaft (82) is fixedly installed at both ends of the middle frame plate (81). The bending frame (71) has a corresponding insertion hole for the round pin shaft (82).

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