Composite underground water quality sampler

Abstract

The utility model discloses a combined underground water sampler which comprises a sampling barrel, a main arm and a soft rope control assembly, one end of a first soft rope in the soft rope control assembly is fixed on a well, and the other end of the first soft rope is detachably connected with the sampling barrel; the main arm comprises N short sections, the two ends of each short section are a ball socket and a ball head respectively, a first channel penetrating through the short section is formed in the central axis of each short section, and a second channel and a third channel are symmetrically arranged on the two sides of each first channel. The first soft rope penetrates through the first channels of the N short sections, and a metal ball is fixedly connected to the first soft rope below the lowermost short section; one end of the second soft rope penetrates through the N short section second channels and is fixedly connected in the uppermost short section ball socket, and the other end of the second soft rope penetrates through the N short section third channels and penetrates out of the uppermost short section ball socket to serve as a second free end. The combined type underground water quality sampler disclosed by the utility model is suitable for an underground complex environment and can pass through obstacles.

Description

Technical Field

[0001] This utility model belongs to the technical field of water quality sampling equipment, specifically relating to a composite downhole water quality sampler. Background Technology

[0002] With increasingly stringent requirements for water ecological environment management, the problem of mixed and incorrect connections in municipal stormwater and sewage pipe networks is receiving growing attention. This is because such connections allow sewage to mix with the stormwater system during the flood season, polluting surface water and severely damaging aquatic ecosystems. Monitoring the water quality of stormwater or sewage wells at key nodes in the municipal pipe network is a common and effective method for determining whether combined stormwater and sewage flows exist. Sampling and analyzing the water quality indicators within these wells provides crucial information for the investigation and remediation of the pipe network.

[0003] Currently, there are two main types of commonly used water samplers: one consists of a rope and a sampling bucket, suitable only for vertical sampling from bridges or boats; the other is a long-arm ladle sampler, which has a beaker or ladle tied to one end of a long pole, generally only suitable for horizontal sampling along riverbanks. Both of these existing samplers have certain limitations when sampling municipal stormwater and sewage wells. The long-arm ladle sampler can generally only be used when the well depth is less than 1 meter; beyond 1 meter, the small well radius limits the angle at which the sampling pole can tilt, making it unusable. While the rope-traction sampler is suitable for vertical sampling, the conditions inside municipal stormwater and sewage wells are complex, with numerous obstacles such as debris and penetrating pipes, and the rope's poor maneuverability makes sampling difficult. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a composite downhole water quality sampler. This composite downhole water quality sampler can adapt to the complex environment inside municipal wells, realize the flexible lowering and stable lifting of the sampling bucket, and provide convenience for water quality monitoring at key nodes of the pipeline network.

[0005] The objective of this utility model is achieved through the following technical solution.

[0006] A composite downhole water sampler includes: a sampling bucket, a main arm, and a flexible rope control assembly, wherein:

[0007] The soft rope control assembly includes: a first soft rope and a second soft rope. One end of the first soft rope is fixed to the well, and the other end of the first soft rope is a first free end. The first free end of the first soft rope is detachably connected to the sampling bucket.

[0008] The main arm includes: N short sections, each with a ball socket at one end and a ball head at the other end. Each short section has a first channel along its central axis, which penetrates the short section.

[0009] The first flexible rope passes through the first channel of N short sections. The ball head of each short section is located in the ball socket of the adjacent short section. A metal ball is fixedly connected to the first flexible rope below the lowest short section to limit the range of downward movement of the main arm on the first flexible rope.

[0010] A second channel is provided on one side of the first channel in each short section, and a third channel is provided on the other side of the first channel in each short section. The second and third channels are symmetrically arranged on both sides of the first channel.

[0011] One end of the second soft rope passes through the second channel of N short sections in the main arm and is fixedly connected to the ball socket of the uppermost short section. The other end of the second soft rope passes through the third channel of N short sections in the main arm and comes out from the ball socket of the uppermost short section as the second free end.

[0012] In the above technical solution, the soft rope control assembly also includes: a winch, with one end of the first soft rope fixed to the wellhead and fixed to the winch.

[0013] This invention relates to a composite downhole water sampler with a flexible main arm that integrates dual soft rope control, short sections, and a metal ball. This effectively solves the industry problems of poor operability, easy jamming, and inaccurate sampling associated with traditional soft rope samplers in complex municipal well environments. This composite downhole water sampler adapts to complex downhole environments, can pass through obstacles, and greatly reduces the risk of getting stuck in cluttered and narrow spaces, demonstrating obstacle avoidance advantages. This invention allows for flexible adjustment of the number of short sections or replacement of sampling buckets with different specifications to suit varying underwater obstacle heights, enhancing the equipment's versatility and application range. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the composite downhole water quality sampler of this utility model;

[0015] Figure 2 This is a cross-sectional view of the lowermost short section of this utility model.

[0016] Among them, 1-1: first soft rope, 1-2: second soft rope, 1-3: winch, 2: short section, 2-1: ball head, 2-2: ball socket, 2-3: first channel, 2-4: second channel, 2-5: third channel, 3: sampling bucket, 4: metal ball. Detailed Implementation

[0017] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] Example 1

[0019] like Figure 1 and Figure 2The diagram illustrates a composite downhole water sampler, comprising: a sampling bucket 3, a main arm, and a flexible rope control assembly, wherein:

[0020] The soft rope control assembly includes: a first soft rope 1-1 and a second soft rope 1-2. One end (upper end) of the first soft rope 1-1 is fixed to the well, and the other end (lower end) of the first soft rope 1-1 is a first free end. The first free end of the first soft rope 1-1 is detachably connected to the sampling bucket 3 (the volume of the sampling bucket 3 is 500mL-2000mL, and the material is 316L stainless steel). The detachable connection can be a threaded connection, a snap-fit ​​connection, or a hook connection.

[0021] The main arm includes: N short sections 2 (each short section 2 is a cylindrical structure, with a length of 80mm to 150mm and a cross-sectional diameter of 25mm to 40mm, and is made of stainless steel). One end (upper end) of the short section 2 is provided with a ball socket 2-2 (ball socket 2-2: a concave cavity structure that matches the ball head 2-1), and the other end (lower end) is provided with a ball head 2-1. Each short section 2 has a first channel 2-3 opened inside along its central axis, and the first channel 2-3 penetrates the short section 2 (one end of the first channel 2-3 is located inside the ball socket 2-2, and the other end is located on the ball head 2-1).

[0022] The first flexible rope 1-1 passes through the first channel 2-3 of N short sections 2. The ball head 2-1 of each short section 2 is located in the ball socket 2-2 of its adjacent short section 2 (the ball head 2-1 can rotate freely within the ball socket 2-2). A metal ball 4 (made of stainless steel) is fixedly connected to the first flexible rope 1-1 below the lowest short section 2. This metal ball 4 is used to limit the range of downward movement of the main arm on the first flexible rope 1-1 (i.e., always keep the main arm above the metal ball 4).

[0023] A second channel 2-4 is provided on one side of the first channel 2-3 of each short section 2, and a third channel 2-5 is provided on the other side of the first channel 2-3 of each short section 2. The second channel 2-4 and the third channel 2-5 are symmetrically arranged on both sides of the first channel 2-3.

[0024] The ball head 2-1 of each section 2 faces downwards. One end of the second flexible rope 1-2 passes through the second channel 2-4 of the lowest section 2 in the main arm from bottom to top, through all the second channels 2-4 of the sections 2. After passing through all the second channels 2-4, the end of the second flexible rope 1-2 is fixedly connected to the ball socket 2-2 of the highest section 2. The other end of the second flexible rope 1-2 passes through the third channel 2-5 of the lowest section 2 in the main arm from bottom to top, through all the third channels 2-5 of the sections 2. The end of the second flexible rope 1-2 passing through the third channel 2-5 emerges from the ball socket 2-2 of the highest section 2 as the second free end. The second free end is not connected to the ball socket 2-2 of the highest section 2. That is, the second flexible rope 1-2 has a "positive U-shaped structure" and runs through all the sections. When the operator tightens the second free end at the surface, the second flexible rope 1-2 generates bidirectional tension along the axis of the section 2. The ball head 2-1 of the shortest section in the main arm has an arc-shaped second soft rope 1-2 attached to its outer surface.

[0025] The working process of the above-mentioned composite downhole water quality sampler is as follows: the second soft rope 1-2 is in a relaxed state, all adjacent short sections 2 can swing freely, the entire main arm is in a flexible state, the first soft rope 1-1 can be lowered into the well, and the sampling bucket 3 is lowered to the target sampling depth along with the first soft rope 1-1.

[0026] Upon encountering an obstacle, the operator tightens the second free end of the second flexible rope 1-2. This tightening generates a force that forces the ball head 2-1 of each section 2 and the ball socket 2-2 of its adjacent section 2 to press tightly together, thus locking all degrees of freedom of the sections 2 and changing the main boom from a flexible to a rigid state. The operator can adjust the rigidity of the main boom by adjusting the tension, allowing the sampling bucket 3 to overcome the obstacle. After sampling, the operator relaxes the second flexible rope 1-2, restoring the main boom to its flexible state. Then, the first flexible rope 1-1 is retrieved, and the sampling bucket 3 is lifted from the well.

[0027] Example 2

[0028] A composite downhole water sampler, based on embodiment 1, further includes a soft rope control assembly: a winch 1-3, one end of a first soft rope 1-1 fixed to the well and the winch 1-3, and a handle installed on the winch 1-3 for rotating the winch 1-3. The length of the first soft rope 1-1 on the winch 1-3 can be controlled by rotating the handle.

[0029] Example 3

[0030] A composite downhole water sampler, based on Example 2, wherein both the first soft rope 1-1 and the second soft rope 1-2 are made of ultra-high molecular weight polyethylene fiber rope, and both the outer surfaces of the first soft rope 1-1 and the second soft rope 1-2 are provided with protective sleeves. The protective sleeves are used to prevent the first soft rope 1-1 from being abraded by sharp objects or corrosive liquids inside the well; the thickness of the protective sleeves is 0.5mm to 1mm. Preferably, the protective sleeves are made of polyurethane (PU) and have a thickness of 0.7mm.

[0031] Each short section 2 has an anti-corrosion coating with a thickness of 0.1 mm to 0.3 mm on its outer surface. Preferably, the anti-corrosion coating is an epoxy resin coating or a polyamide coating with a thickness of 0.2 mm.

[0032] The difference between the outer spherical radius of the ball head 2-1 and the inner spherical radius of the ball socket 2-2 of each short section 2 is 0.1mm to 0.3mm, ensuring smooth rotation.

[0033] Example 4

[0034] A composite downhole water sampler, based on Example 3, has a water quality sensor, a pH sensor, and a turbidity sensor fixedly installed inside the sampling bucket 3. The water quality sensor is used to detect the dissolved oxygen content in the water sample, the pH sensor is used to detect the acidity or alkalinity of the water sample, and the turbidity sensor is used to detect the degree of turbidity of the water sample.

[0035] The present invention has been described above by way of example. It should be noted that, without departing from the core of the present invention, any simple modifications, alterations or other equivalent substitutions that can be made by those skilled in the art without creative effort fall within the protection scope of the present invention.

Claims

1. A composite downhole water sampler, characterized in that, include: The sampling bucket (3), the main boom, and the soft rope control assembly include: The soft rope control assembly includes: a first soft rope (1-1) and a second soft rope (1-2). One end of the first soft rope (1-1) is fixed to the well, and the other end of the first soft rope (1-1) is a first free end. The first free end of the first soft rope (1-1) is detachably connected to the sampling bucket (3). The main arm includes: N short segments (2), one end of the short segment (2) is provided with a ball socket (2-2), and the other end is provided with a ball head (2-1); each short segment (2) has a first channel (2-3) opened along its central axis inside, and the first channel (2-3) penetrates the short segment (2); The first soft rope (1-1) passes through the first channel (2-3) of the N short sections (2). The ball head (2-1) of each short section (2) is located in the ball socket (2-2) of the adjacent short section (2). A metal ball (4) is fixedly connected to the first soft rope (1-1) below the lowest short section (2) to limit the range of downward movement of the main arm on the first soft rope (1-1). A second channel (2-4) is provided on one side of the first channel (2-3) of each short section (2), and a third channel (2-5) is provided on the other side of the first channel (2-3) of each short section (2). The second channel (2-4) and the third channel (2-5) are symmetrically arranged on both sides of the first channel (2-3). One end of the second soft rope (1-2) passes through the second channel (2-4) of the N short sections (2) in the main arm and is fixedly connected in the ball socket (2-2) of the uppermost short section (2). The other end of the second soft rope (1-2) passes through the third channel (2-5) of the N short sections (2) in the main arm and comes out from the ball socket (2-2) of the uppermost short section (2) as the second free end.

2. The composite downhole water sampler according to claim 1, characterized in that, The soft rope control assembly also includes a winch (1-3), with one end of the first soft rope (1-1) fixed to the wellhead and fixed to the winch (1-3).

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