A method for performing water quality sampling using an apparatus for water quality sampling of a drainage pipe network

Abstract

The present invention provides an apparatus and method for sampling water quality in a drainage network, which includes a water sampling bucket for sampling water samples, the water sampling bucket includes a water inlet located at an upper part and a water outlet located at a lower part, the water sampling bucket is attached to a support so as to be adjustable in height and can be hooked to a specified height of the support according to the water sampling depth requirement to achieve sampling of water quality at a set water level, and a lifting mechanism capable of connecting multiple stages and adjusting the length is fixedly attached to the top of the support to accommodate sampling of water quality in inspection wells of different depths. This apparatus is well suited for water quality sampling when sediments of different thicknesses are present in the network, and ensures that water samples can be collected at the same set water depth position every time water is sampled during the sampling process, ensuring sampling accuracy, and further ensuring the accuracy and results of subsequent calculations.

Description

Technical Field

[0001] The present invention relates to the field of pipe network water quality detection, and particularly to an apparatus and method for sampling the water quality of a drainage pipe network.

Background Art

[0002] Detecting the water quality in a drainage pipe network inspection well at regular intervals is an important means to investigate whether groundwater has invaded the drainage pipe network. To form a good control result, it is required that water samples can be collected at the same position each time. However, with the operation of the pipe network, sediment gradually accumulates inside the inspection well to form deposits, and the depth distribution of the deposits in the inspection well is different. Thus, when performing water quality sampling at the same position later, a general commercially available water quality sampler mainly uses a rope water quality sampler, and it is difficult to control its working depth, and it is impossible to ensure well that the water samples collected each time are water samples with the same water sampling depth, which affects the subsequent detection results and causes deviations in the detection results. Specifically, referring to FIG. 1 showing the water level height when there is no sediment in the inspection well, the water sample collected using a rope water quality sampler at this time is a water sample with a water level height of H. Specifically, as shown in FIG. 2, when there is sediment in the inspection well, the water level in the inspection well increases, and the water sample collected using a rope water quality sampler at this time is a water sample with a water level height of H1. Substantially, it is required to collect the water sample with the initial water level H. Thus, the two water sampling water levels are not at the same height. Also, since sediment is stirred up during the water sampling process, it often affects the water quality data quality due to different contents of sediment each time water is sampled.

[0003] For example, in the sampling device for a drainage pipe network described in the conventional CN210322446U, sampling of the drainage pipe network is performed by providing a bucket at the end of a telescopic rod, and during the sampling process, the water sampling depth cannot be accurately controlled each time.

[0004] In the sewage and wastewater quality sampling device described in CN209356242U, a sampling container is provided at the end of the inclined rod portion to achieve the effect of sampling. However, during the sampling process, it is also impossible to accurately control the water depth of each water sampling every time.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the above problems, the present invention can be well applied to water quality sampling when there are sediments with different thicknesses in the pipe network, and during the sampling process, it is ensured that water samples at the same water depth position set each time of water sampling can be collected, the sampling accuracy is ensured, and further the calculation accuracy and results of subsequent steps are ensured. The object of the present invention is to propose an apparatus and method for sampling the water quality of a drainage pipe network.

Means for Solving the Problems

[0006] In order to solve the above technical problems, the technical means adopted in the present invention are as follows: It includes a water sampling bucket for collecting water samples. The water sampling bucket includes a water inlet part located at the upper part and a drainage part located at the lower part. The water sampling bucket is attached to a support in a liftable and adjustable manner, and can be locked at the specified height of the support according to the water sampling depth requirement to achieve the sampling of water quality at the set water level height. An apparatus for sampling the water quality of a drainage pipe network, in which a lifting mechanism capable of adjusting the length by connecting multiple stages is fixedly attached to the top of the support so as to adapt to the sampling of the water quality of inspection wells with different depths.

[0007] The water inlet part has a rectangular parallelepiped shape, includes six faces, with the top face closed, four side faces symmetrically arranged, a first water inlet and a second water inlet symmetrically arranged on a pair of side faces, two sets of first fixing bolts and second fixing bolts with different heights respectively installed on the other pair of side faces, nuts attached to the first fixing bolts and the second fixing bolts respectively, and a water outlet installed on the bottom face, and includes a water inlet tank.

[0008] The water inlet tank is made of transparent organic glass. The first water inlet and the second water inlet adopt rectangular openings and are installed at the upper part of the side face of the water inlet tank. The installation height is less than half of the side face height, and the installation width is greater than half of the side face width. The first fixing bolts or the second fixing bolts located on the same side are aligned vertically, and the first fixing bolts and the second fixing bolts on both side faces are arranged with a vertical offset in the same plane. Male threads for screwing with nuts are machined on the first fixing bolts and the second fixing bolts.

[0009] The drainage part includes a conical barrel. A male threaded connection port is installed at the top end of the conical barrel. The male threaded connection port is screwed into a female threaded connection port installed at the bottom end of the water inlet tank. The female threaded connection port is installed at the position where the water outlet is located. A drainage control valve for controlling water outflow is installed at the bottom end of the conical barrel.

[0010] The support includes a cylindrical rod. A slide groove is machined along the axial direction at the lower central part of the cylindrical rod. Scale lines are installed on the outer wall of the slide groove. A first nut sleeve is installed at the top end of the cylindrical rod. The first fixing bolts and the second fixing bolts are engaged with the slide groove.

[0011] The length of the slide groove is 2 / 3 of the length of the cylindrical rod, and the other 1 / 3 of the length maintains the original state of the cylindrical rod. The scale lines are arranged from the bottom of the groove to the top of the groove.

[0012] The lifting mechanism includes a vertical rod, with a second nut sleeve fixed to the top end of the vertical rod, a screw bolt installed at the bottom end of the vertical rod, and the screw bolt being screwed into the second nut sleeve of another vertical rod.

[0013] An opposed through-hole is machined in the vertical rod, a horizontal rod is engaged in the opposed through-hole, and male threads for screwing into lock nuts are attached to two tip ends of the horizontal rod.

[0014] A method for performing water quality sampling using a device for sampling the water quality of a drainage pipe network, detecting the depth of sediment, that is, Step 1 of measuring the depth of sediment in an inspection well using a commercially available sediment column sampler, taking the thickness of the sediment as h, and simultaneously measuring the water level height inside the inspection well and taking it as B; setting the water sampling height, that is, Step 2 of setting a desired water sampling depth A according to the water sampling requirement, where the water sampling depth A is the value of the height from the bottom of the inspection well to the water sampling point; marking the mounting height of the water sampling bucket, that is, Taking out the support, marking the mark position on the scale line of the support according to the thickness h of the sediment to be measured. After the water sampling bucket is mounted, it must be ensured that the distance D from the bottom end of the conical barrel to the bottom end of the cylindrical rod is greater than the thickness h of the sediment, that is, D≥h, so that the bottom end of the conical barrel does not touch the sediment. determining the mounting height of the water sampling bucket, that is, According to the water sampling depth A set in Step 2, that is, according to the water sampling depth A with the top ends of the first water inlet and the second water inlet of the water sampling bucket as the marking line, setting the mounting height of the water sampling bucket on the support as A, and ensuring that A - C≥h, where C is the height of the water sampling bucket. mounting and fixing the water sampling bucket, that is, Step 5 of mounting the water sampling bucket on the cylindrical rod of the support according to the mounting height determined in Step 4, and then locking the water sampling bucket to the support with nuts. Assemble the lifting mechanism, that is, According to the depth of the inspection well, assemble the lifting mechanism, and attach multiple vertical rods to the working height one by one by screwing between the screw bolts and the second nut sleeve. Next, assemble the lifting mechanism and the support device, and then attach the horizontal rod to form the lifting mechanism in step 6, Conduct water quality sampling, that is, After the installation of the sampling device is completed, hold the lifting mechanism by hand and insert the sampling device into the inspection well. Insert the cylindrical rod to the bottom end of the inspection well, and then collect the water sample at the fixed depth position A in step 7, Take out the water sample, that is, After collecting the water sample, lift the entire sampling device out of the inspection well, discharge the obstructive sediment at the bottom of the sediment at the bottom of the water sampling bucket, and then inject the water sample into the storage bottle and send it to the laboratory for inspection in step 8, Recover the sampling device, that is, After the water sample collection is completed, remove the members of the sampling device one by one and store them in the member box for the next use in step 9.

[0015] When A - C < h, use another model number of water sampling bucket instead, select C1 as the height of the water sampling bucket, and ensure that A - C1 ≥ h.

[0016] The beneficial effects of the present invention are as follows. 1. The device of the present invention can be well applied to water quality sampling when there are sediments with different thicknesses in the pipe network. During the sampling process, it ensures that water samples at the same water depth position set each time of water sampling can be collected, guarantees the sampling accuracy, and further ensures the subsequent calculation accuracy and results. The present invention overcomes the drawbacks of the conventional rope water quality sampler and constructs a device assembly applicable to the water quality sampling of the drainage pipe network, having high industrial utilization value.

[0017] 2. By installing the water inlet part, during the sampling process, the water sample can easily flow into the inside of the water inlet tank.

[0018] 3. The transparent organic glass facilitates the observation of the state of the water sample collected and the subsequent control of sediment discharge.

[0019] 4. The above-mentioned first fixing bolt and second fixing bolt facilitate the attachment of the water sampling bucket and the support device.

[0020] 5. The above-mentioned drainage part facilitates subsequent drainage.

[0021] 6. The above-mentioned slide groove facilitates the adjustment of the attachment height of the water sampling bucket.

[0022] 7. The lifting mechanism facilitates height adjustment and adapts to inspection wells at different heights.

Brief Description of the Drawings

[0023] Hereinafter, the present invention will be further described with reference to the drawings and embodiments.

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0025] Hereinafter, embodiments of the present invention will be further described with reference to the drawings.

[0026] (Example 1) Referring to FIGS. 3 - 10, it includes a water sampling bucket 1 for collecting water samples. The water sampling bucket 1 includes a water inlet part located at the upper part and a drainage part located at the lower part. The water sampling bucket 1 is attached to a support 2 in an adjustable up - and - down manner and is locked at a specified height of the support 2 according to the water sampling depth requirement to achieve sampling of water quality at a set water level height, so as to adapt to water quality sampling of inspection wells with different depths. At the top of the support 2, a lifting mechanism 3 that can adjust the length by connecting multiple sections is fixedly attached. It is a device for water quality sampling of a drainage pipe network. The device of the present invention can be well applied to water quality sampling when there are deposits with different thicknesses in the pipe network, and during the sampling process, it can ensure that water samples at the same water depth position set each time of water collection are collected, ensuring the sampling accuracy, and further ensuring the subsequent calculation accuracy and results. The present invention overcomes the drawbacks of the conventional rope water sampler and constructs a device assembly applicable to water quality sampling of a drainage pipe network, having high industrial utilization value.

[0027] Furthermore, the water inlet part has a cuboid - shaped outer shape, including six faces. The top face is closed, the four side faces are symmetrically installed, and a first water inlet 101 and a second water inlet 105 are symmetrically arranged on a pair of side faces. On the other pair of side faces, two sets of first fixing bolts 102 and second fixing bolts 106 with different heights are installed respectively. Nuts 103 are attached to the first fixing bolts 102 and the second fixing bolts 106 respectively, and a water outlet 107 is installed on the bottom surface. It includes a water inlet tank 108. By installing the water inlet part, during the sampling process, water samples can easily flow into the interior of the water inlet tank 108.

[0028] Furthermore, the water inlet tank 108 is made of transparent organic glass. The transparent organic glass makes it easy to observe the state of the water samples collected and facilitates the control of subsequent sediment discharge.

[0029] Furthermore, the first water inlet 101 and the second water inlet 105 adopt rectangular openings and are installed at the upper part of the side surface of the water inlet tank 108. The installation height is less than half of the side surface height, and the installation width is greater than half of the side surface width. With the above-mentioned first water inlet 101 and second water inlet 105, the water inflow process is facilitated.

[0030] Furthermore, the first fixing bolts 102 or the second fixing bolts 106 located on the same side are aligned vertically, and the first fixing bolts 102 and the second fixing bolts 106 on both side surfaces are arranged vertically offset in the same plane. Male threads for screwing with nuts 103 are machined on the first fixing bolts 102 and the second fixing bolts 106. With the above-mentioned first fixing bolts 102 and second fixing bolts 106, the installation of the water sampling bucket 1 and the support 2 is facilitated.

[0031] Furthermore, the drainage part includes a conical barrel 109. A male threaded connection port 111 is installed at the top end of the conical barrel 109. The male threaded connection port 111 is screwed into a female threaded connection port 104 installed at the bottom end of the water inlet tank 108. The female threaded connection port 104 is installed at the position where the water outlet 107 is located. A drainage control valve 110 for controlling water outflow is installed at the bottom end of the conical barrel 109. With the above-mentioned drainage part, subsequent drainage is facilitated.

[0032] Furthermore, the support 2 includes a cylindrical rod 201. A slide groove 203 arranged along its axial direction is machined at the lower central part of the cylindrical rod 201. Scale lines 202 are installed on the outer wall of the slide groove 203. A first nut sleeve 204 is installed at the top end of the cylindrical rod 201. The first fixing bolts 102 and the second fixing bolts 106 are engaged with the slide groove 203. With the above-mentioned slide groove 203, the adjustment of the installation height of the water sampling bucket 1 is facilitated.

[0033] Furthermore, the length of the slide groove 203 is 2 / 3 of the length of the cylindrical rod 201, and the other 1 / 3 of the length maintains the original state of the cylindrical rod. The scale lines 202 are arranged from the bottom of the groove to the top of the groove.

[0034] Furthermore, the lifting mechanism 3 includes a vertical rod 301. A second nut sleeve 306 is fixed to the top end of the vertical rod 301, and a screw bolt 303 is installed at the bottom end of the vertical rod 301. The screw bolt 303 is screwed into the second nut sleeve 306 of another vertical rod 301. The lifting mechanism 3 facilitates height adjustment and enables adaptation to inspection wells of different heights.

[0035] Furthermore, an opposing through-hole 302 is machined in the vertical rod 301, and a horizontal rod 304 is engaged with the opposing through-hole 302. Male threads for screwing into lock nuts 305 are attached to two tip ends of the horizontal rod 304. The above-mentioned horizontal rod 304 enhances the connection strength between the two.

[0036] (Example 2) A method for performing water quality sampling using a device for sampling the water quality of a drainage pipe network, comprising: detecting the depth of the sediment 6, i.e., Step 1: Measuring the depth of the sediment 6 in the inspection well 5 using a commercially available sediment column sampler 4, taking the thickness of the sediment 6 as h, and simultaneously measuring the water level height inside the inspection well 5 and designating it as B; setting the water sampling height, i.e., Step 2: Setting a desired water sampling depth A according to the water sampling requirement, where the water sampling depth A is the value of the height from the bottom of the inspection well 5 to the water sampling point; marking the mounting height of the water sampling bucket 1, i.e., Taking out the support 2 and marking a position on the scale line 202 of the support 2 according to the thickness h of the sediment 6 to be measured. After mounting the water sampling bucket 1, this marked position ensures that the distance D from the bottom end of the conical barrel 109 to the bottom end of the cylindrical rod 201 is greater than the thickness h of the sediment 6, i.e., D≥h, so that the bottom end of the conical barrel 109 does not touch the sediment 6; determining the mounting height of the water sampling bucket 1, i.e., According to the water sampling depth A set in step 2, that is, according to the water sampling depth A with the top ends of the first water inlet 101 and the second water inlet 105 of the water sampling bucket 1 as the marking lines, the mounting height of the water sampling bucket 1 on the support 2 is set as A, and ensure that A - C ≥ h, where C is the height of the water sampling bucket 1, step 4, and Install and fix the water sampling bucket 1, that is, According to the mounting height determined in step 4, attach the water sampling bucket 1 to the cylindrical rod 201 of the support 2, and then lock the water sampling bucket 1 to the support 2 with the nut 103, step 5, and Assemble the lifting mechanism 3, that is, According to the depth of the inspection well 5, assemble the lifting mechanism 3. Attach multiple vertical rods 301 one by one to the working height by screwing between the screw bolts 303 and the second nut sleeve 306. Then assemble the lifting mechanism 3 and the support 2, and then attach the horizontal rod 304 to form the lifting mechanism, step 6, and Conduct water quality sampling, that is, After the installation of the sampling device is completed, hold the lifting mechanism by hand and insert the sampling device into the inspection well. Insert the cylindrical rod 201 to the bottom end of the inspection well 5, and then collect the water sample at the fixed depth position A, step 7, and Take out the water sample, that is, After collecting the water sample, lift the entire sampling device out of the inspection well, discharge the obstructive sediment at the bottom of the sediment at the bottom of the water sampling bucket 1, and then inject the water sample into the storage bottle and send it to the laboratory for inspection, step 8, and Recover the sampling device, that is, After the water sample collection is completed, remove the members of the sampling device one by one and store them in the member box for preparation for the next use, step 9.

[0037] Furthermore, when A - C < h, instead, use another model number of the water sampling bucket 1, select C1 as the height of the water sampling bucket 1, and ensure that A - C1 ≥ h. By the above arrangement, prevent the bottom end of the water sampling bucket 1 from stirring up the sediment.

[0038] (Appendix) (Appendix 1) It includes a water sampling bucket (1) for collecting water samples, The water sampling bucket (1) includes a water inlet located at the upper part and a drain outlet located at the lower part, The water sampling bucket (1) is attached to a support (2) in a vertically adjustable manner and can be locked at the specified height of the support (2) according to the required water sampling depth to achieve sampling of water quality at the set water level height, A lifting mechanism (3) that can adjust its length by connecting multiple sections is fixedly attached to the top of the support (2) so as to adapt to sampling of water quality in inspection wells with different depths. The device is characterized by this for water quality sampling of a drainage pipe network.

[0039] (Appendix 2) The water inlet part has a cuboid outer shape, includes six faces, the top face is closed, the four side faces are symmetrically installed, a first water inlet (101) and a second water inlet (105) that are symmetrically arranged are installed on a pair of side faces, and two sets of first fixing bolts (102) and second fixing bolts (106) with different heights are installed on the other pair of side faces respectively. Nuts (103) are respectively attached to the first fixing bolts (102) and the second fixing bolts (106), and a water outlet (107) is installed on the bottom surface. The device for water quality sampling of a drainage pipe network according to Appendix 1 is characterized by including a water inlet tank (108).

[0040] (Appendix 3) The water inlet tank (108) is made of transparent organic glass, The first water inlet (101) and the second water inlet (105) adopt rectangular openings and are installed at the upper part of the side face of the water inlet tank (108). The installation height is less than half of the side face height, and the installation width is greater than half of the side face width. The first fixing bolt (102) or the second fixing bolt (106) located on the same side are aligned vertically, and the first fixing bolts (102) and the second fixing bolts (106) on both side surfaces are arranged vertically offset in the same plane. The first fixing bolt (102) and the second fixing bolt (106) are characterized in that male threads for screwing into nuts (103) are machined thereon. The device for sampling the water quality of a drainage pipe network according to supplementary note 2.

[0041] (Supplementary Note 4) The drainage part includes a conical barrel (109). A male threaded connection port (111) is installed at the top end of the conical barrel (109). The male threaded connection port (111) is screwed into a female threaded connection port (104) installed at the bottom end of the water inflow tank (108). The female threaded connection port (104) is installed at the position where the water outlet (107) is located. A drainage control valve (110) for controlling water outflow is installed at the bottom end of the conical barrel (109). The device for sampling the water quality of a drainage pipe network according to supplementary note 2.

[0042] (Supplementary Note 5) The support (2) includes a cylindrical rod (201). A slide groove (203) arranged along its axial direction is machined at the lower central part of the cylindrical rod (201). A scale line (202) is installed on the outer wall of the slide groove (203). A first nut sleeve (204) is installed at the top end of the cylindrical rod (201). The first fixing bolt (102) and the second fixing bolt (106) are engaged with the slide groove (203). The device for sampling the water quality of a drainage pipe network according to supplementary note 2.

[0043] (Supplementary Note 6) The slide groove (203) has a length that is 2 / 3 of the length of the cylindrical rod (201), and the other 1 / 3 of the length maintains the original state of the cylindrical rod. The scale line (202) is arranged from the bottom of the groove to the top of the groove. The device for sampling the water quality of a drainage pipe network according to supplementary note 5.

[0044] (Supplementary Note 7) The lifting mechanism (3) includes a vertical rod (301), a second nut sleeve (306) is fixed to the top end of the vertical rod (301), a screw bolt (303) is installed at the bottom end of the vertical rod (301), and the screw bolt (303) is screwed into the second nut sleeve (306) of another vertical rod (301). The device for sampling the water quality of a drainage pipe network according to Addendum 1 is characterized in that.

[0045] (Addendum 8) An opposing through-hole (302) is machined in the vertical rod (301), a horizontal rod (304) is engaged in the opposing through-hole (302), and male threads for screwing into a lock nut (305) are attached to two tip ends of the horizontal rod (304). The device for sampling the water quality of a drainage pipe network according to Addendum 7 is characterized in that.

[0046] (Addendum 9) A method for performing water quality sampling using the device for sampling the water quality of a drainage pipe network according to any one of Addenda 1 to 8, Detecting the depth of the sediment (6), that is, Step 1 of measuring the depth of the sediment (6) in the inspection well (5) using a commercially available sediment column sampler (4), taking the thickness of the sediment (6) as h, and simultaneously measuring the water level height inside the inspection well (5) and taking it as B; Setting the water sampling height, that is, Step 2 of setting a desired water sampling depth A according to the water sampling requirement, where the water sampling depth A is the value of the height from the bottom of the inspection well (5) to the water sampling point; Marking the mounting height of the water sampling bucket (1), that is, Taking out the support (2), marking the position on the scale line (202) of the support (2) according to the thickness h of the sediment (6) to be measured. This marked position ensures that after the water sampling bucket (1) is mounted, the distance D from the bottom end of the conical barrel (109) to the bottom end of the cylindrical rod (201) is greater than the thickness h of the sediment (6), that is, D ≧ h, so that the bottom end of the conical barrel (109) does not touch the sediment (6). Step 3; Determining the mounting height of the water sampling bucket (1), that is, According to the water sampling depth A set in step 2, that is, according to the water sampling depth A with the top ends of the first water inlet (101) and the second water inlet (105) of the water sampling bucket (1) as the marking lines, the mounting height of the water sampling bucket (1) on the support (2) is set to A, and A - C ≥ h is ensured, where C is the height of the water sampling bucket (1), step 4, and Attach and fix the water sampling bucket (1), that is, According to the mounting height determined in step 4, attach the water sampling bucket (1) to the cylindrical rod (201) of the support (2), and then lock the water sampling bucket (1) to the support (2) with the nut (103) in step 5, and Assemble the lifting mechanism (3), that is, According to the depth of the inspection well (5), assemble the lifting mechanism (3), and attach each of the plurality of vertical rods (301) to the working height one by one by screwing between the screw bolt (303) and the second nut sleeve (306). Next, assemble the lifting mechanism (3) and the support (2), and then attach the horizontal rod (304) to form the lifting mechanism in step 6, and Perform water quality sampling, that is, After the installation of the sampling device is completed, hold the lifting mechanism by hand and insert the sampling device into the inspection well. Insert the cylindrical rod (201) to the bottom end of the inspection well (5), and then collect the water sample at the fixed depth position A in step 7, and Take out the water sample, that is, After collecting the water sample, lift the entire sampling device out of the inspection well, discharge the obstructive sediment at the bottom of the sediment at the bottom of the water sampling bucket (1), and then inject the water sample into the storage bottle and send it to the laboratory for inspection in step 8, and Recover the sampling device, that is, After the water sample collection is completed, remove the members of the sampling device one by one and store them in the member box for the next use. A method for performing water quality sampling using a device for water quality sampling of a drainage pipe network, characterized by including step 9.

[0047] (Appendix 10) When A - C < h, instead use a water sampling bucket (1) of another model number, select C1 as the height of the water sampling bucket (1), and ensure that A - C1 ≥ h. A method for water quality sampling using the device for sampling the water quality of a drainage pipe network described in Supplementary Note 9, characterized by the above.

Explanation of Signs

[0048] 1 Water sampling bucket, 2 Support device, 3 Lifting mechanism, 4 Sediment columnar sampler, 5 Inspection well, 6 Sediment, 7 Water sampling water level line, 8 Sediment height line, 9 Bottom end line of water sampling bucket, 101 First water inlet, 102 First fixing bolt, 103 Nut, 104 Female screw connection port, 105 Second water inlet, 106 Second fixing bolt, 107 Water outlet, 108 Water inflow tank, 109 Conical barrel, 110 Drainage control valve, 111 Male screw connection port, 201 Cylindrical rod, 202 Scale line, 203 Slide groove, 204 First nut sleeve, 301 Vertical rod, 302 Opposite through hole, 303 Screw bolt, 304 Horizontal rod.

Claims

A method for water quality sampling using a device for water quality sampling of a drainage pipe network, comprising: The device for water quality sampling of a drainage pipe network includes: a water sampling bucket (1) for collecting water samples, the water sampling bucket (1) includes a water inlet part located at the upper part and a drainage part located at the lower part, the water sampling bucket (1) is attached to a support (2) in a vertically adjustable manner and is locked at a specified height of the support (2) according to the water sampling depth requirement to achieve water quality sampling at a set water level height, a lifting mechanism (3) capable of adjusting the length by connecting multiple stages is fixedly attached to the top of the support (2) to adapt to water quality sampling of inspection wells with different depths, the drainage part includes a conical barrel (109), the support (2) includes a cylindrical rod (201), a slide groove (203) arranged along its axial direction is processed at the lower central part of the cylindrical rod (201), and a scale line (202) is installed on the outer wall of the slide groove (203), the lifting mechanism (3) includes a vertical rod (301), a second nut sleeve (306) is fixed to the top end of the vertical rod (301), and a screw bolt (303) is installed at the bottom end of the vertical rod (301), a counter bore (302) is processed in the vertical rod (301), and a cross rod (304) is engaged in the counter bore (302), The method includes: detecting the depth of the sediment (6), that is, measuring the depth of the sediment (6) in the inspection well (5) using a commercially available sediment column sampler (4), taking the thickness of the sediment (6) as h, and simultaneously measuring the water level height inside the inspection well (5) and taking it as B in step 1; setting the water sampling height, that is, setting a desired water sampling depth A according to the water sampling requirement, where the water sampling depth A is the height value from the bottom of the inspection well (5) to the water sampling point in step 2; marking the mounting height of the water sampling bucket (1), that is, taking out the support (2), marking a position on the scale line (202) of the support (2) according to the thickness h of the sediment (6) to be measured. After attaching the water sampling bucket (1), the distance D from the bottom end of the conical barrel (109) to the bottom end of the cylindrical rod (201) must be ensured to be greater than the thickness h of the sediment (6), that is, D≧h, so that the bottom end of the conical barrel (109) does not touch the sediment (6) in step 3. Determine the mounting height of the water sampling bucket (1), that is, According to the water sampling depth A set in Step 2, that is, according to the water sampling depth A with the top ends of the first water inlet (101) and the second water inlet (105) of the water sampling bucket (1) as the marking lines, set the mounting height of the water sampling bucket (1) on the support (2) as A, and ensure that A - C ≥ h, where C is the height of the water sampling bucket (1), and Step 4, Install and fix the water sampling bucket (1), that is, According to the mounting height determined in Step 4, attach the water sampling bucket (1) to the cylindrical rod (201) of the support (2), and then lock the water sampling bucket (1) to the support (2) with the nut (103) in Step 5, Assemble the lifting mechanism (3), that is, According to the depth of the inspection well (5), assemble the lifting mechanism (3), and attach each of the plurality of vertical rods (301) to the working height one by one by screwing between the screw bolt (303) and the second nut sleeve (306). Then assemble the lifting mechanism (3) and the support (2), and then attach the horizontal rod (304) to form the lifting mechanism in Step 6, Perform water quality sampling, that is, After the installation of the sampling device is completed, hold the lifting mechanism by hand and insert the sampling device into the inspection well, insert the cylindrical rod (201) to the bottom end of the inspection well (5), and then collect the water sample at the fixed depth position A in Step 7, Take out the water sample, that is, After collecting the water sample, lift the entire sampling device out of the inspection well, discharge the obstructive sediment at the bottom of the sediment at the bottom of the water sampling bucket (1), and then inject the water sample into a storage bottle and send it to the laboratory for inspection in Step 8, Recover the sampling device, that is, After the water sample collection is completed, remove the members of the sampling device one by one and store them in a member box for the next use. A method for performing water quality sampling using a device for water quality sampling of a drainage pipe network, characterized by including Step 9.

2. The water inlet part has a rectangular parallelepiped shape on the outer surface, includes six faces, the top face is closed, the four side faces are symmetrically installed, a first water inlet (101) and a second water inlet (105) which are symmetrically arranged are installed on a pair of side faces, two sets of first fixing bolts (102) and second fixing bolts (106) with different heights are respectively installed on the other pair of side faces, nuts (103) are respectively attached to the first fixing bolts (102) and the second fixing bolts (106), and the method according to claim 1 is characterized by including a water inlet tank (108) with a water outlet (107) installed on the bottom surface.

3. The water inlet tank (108) is made of transparent organic glass as the material. The first water inlet (101) and the second water inlet (105) adopt rectangular openings and are installed at the upper part on the side face of the water inlet tank (108). The installation height is smaller than half of the side face height, and the installation width is larger than half of the side face width. The first fixing bolts (102) or the second fixing bolts (106) located on the same side are aligned vertically, and the first fixing bolts (102) and the second fixing bolts (106) on both side faces are arranged with a vertical offset in the same plane. The first fixing bolts (102) and the second fixing bolts (106) are processed with male threads for screwing with nuts (103). The method according to claim 2 is characterized by this.

4. A male thread connecting port (111) is installed at the top end of the conical barrel (109). The male thread connecting port (111) is screwed into a female thread connecting port (104) installed at the bottom end of the water inlet tank (108). The female thread connecting port (104) is installed at the position where the water outlet (107) is located. A drain control valve (110) for controlling water outflow is installed at the bottom end of the conical barrel (109). The method for water quality sampling of a drainage pipe network according to claim 2 is characterized by this.

5. A first nut sleeve (204) is installed at the top end of the cylindrical rod (201). The method according to claim 2 is characterized by the first fixing bolts (102) and the second fixing bolts (106) being engaged with the slide groove (203).

6. The slide groove (203) has a length that is 2 / 3 of the length of the cylindrical rod (201). The other 1 / 3 of the length maintains the original state of the cylindrical rod. The scale line (202) is arranged from the bottom of the groove to the top of the groove. The method according to claim 5 is characterized by this. **Claim 7**: The method according to claim 1, characterized in that the screw bolt (303) is screwed into the second nut sleeve (306) of another vertical rod (301). **Claim 8**: The method according to claim 7, characterized in that male threads for screwing into the lock nuts (305) are attached to two tip portions of the horizontal rod (304). **Claim 9** **Claim 1**: When A - C < h, instead use a water sampling bucket (1) of another model number, select C1 as the height of the water sampling bucket (1), and ensure that A - C1 ≥ h.

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