CN103383316B - A water sample collector and water quality measurement system - Google Patents

Abstract

The invention provides a water sample collector and a water quality detection system. The water sample collector includes a sequentially connected water collector, a water diversion pipe, a diversion pipe, and a water storage tank; the water quality detection system includes a water sample collector and a The water quality detection probe in the water storage tank of the sample collector. The device of the invention has the advantages of simple structure, easy installation and operation, without external power, and can collect water samples below the water surface to above the water surface for water quality monitoring. The water sample collector and water quality detection system of the present invention are suitable for use in field environments, especially for use under high-speed movement or high-speed water flow conditions. The device of the present invention can realize rapid, accurate and continuous automatic collection of water samples at a fixed water depth on the surface of the water body, and at the same time carry out accurate unattended online synchronous measurement of the water quality index at the sampling position, and the water quality analysis of the water samples is accurate and can be real It reflects the distribution of water quality in the water body.

Description

A water sample collector and water quality measurement system

technical field

The invention relates to a water sample collection device and a water quality detection device, in particular to a continuous and automatic water sample collector and a continuous and real-time water quality measurement system.

Background technique

In the scientific research and management of water environment protection, the collection of representative water samples and the determination of water quality indicators are one of the most important basic tasks. In order to grasp the distribution of water quality indicators in the water body, it is necessary to continuously collect water samples and online simultaneous determination of water quality indicators at multiple locations and fixed water depths in the water body.

At present, there are many studies on water sample collection and measurement devices, and a variety of commercial samplers have been developed, which can perform stratified sampling of water samples with different requirements, but the existing water sample collection devices and water quality analysis equipment can only perform Manual fixed-point sampling is an intermittent sampling and water quality analysis device. It cannot continuously collect water samples, cannot continuously and real-time measure and analyze the water quality of the collected water samples, and cannot continuously measure the water quality at the same depth. The depth of the sample is unstable, the collected water sample and water quality analysis are not accurate, and cannot truly reflect the distribution of water quality in the water body.

For example, the patent No. 200810056758.1 discloses a layered water sampler for lakes and reservoirs. The water sampler includes a sampling bottle and a traction rope, a fixed frame supporting the sampling bottle, and a bracket connected to the fixed frame, which are arranged on the bracket. It can also move up and down along the support, and is used to seal the sealing device of the sampling bottle. The traction rope is fixedly connected with the support, and the end of the support is provided with a counterweight. Although this water sample sampler ensures that no significant dissolved gas loss is caused during the sampling process, the sampling effect is good, and it is suitable for the characteristics of field sampling work and various field sampling conditions; patent application 2009100181311 discloses a sewage sampler, The water body sampler includes a shell that penetrates up and down. The upper wall of the shell is provided with a through hole, and the bottom of the shell is provided with an openable and sealable bottom cover. The bottom cover is connected with a rope. For the floating ball, there are two rings connected to a thin rope with a fixed scale on the outer wall of the shell. The thin rope is tied to the two rings, and a lead pendant is tied to the lower end. The sewage body sampler is easy to operate and can collect sewage at different depths. However, the above two water samplers are not provided with depth positioning components, and are only suitable for sampling activities in a static state. When the sampler is moving at a high speed or in a high-velocity water body, the traction rope and the counterweight or the string and the lead pendant are easy to be arbitrary. Swing, the position of the sampler in the water body changes, causing the sampling depth of the sampler to vary when collecting water samples, and the depth of the collected water samples cannot be guaranteed to be constant.

As another example, utility model patent 201120049363.6 provides a new type of water quality sampler. The structure of the sampler includes a kettle and a pole. The kettle is arranged on the pole. The upper and lower ends of the pole are respectively provided with fixed pulleys. They are connected together through a transmission chain, the kettle is connected with the pole through a sliding sleeve, the sliding sleeve and the pole are slidingly connected, the sliding sleeve is connected with the transmission chain, and the upper end of the kettle is provided with a pull switch; the support The upper end of the rod is vertically provided with a handle with the support rod, the lower end of the handle is provided with a guide wheel, the guide wheel is provided with a pull rope, and the other end of the pull rope with a pull ring at one end is connected with the pull switch. Compared with the prior art, this sampler has the characteristics of reasonable design, simple structure, convenient use, equipment slipping out of hands, and easy work, etc., but this sampler needs to manually move the water sample collection parts repeatedly, which cannot Continuous automatic collection is not convenient for the collection of a large number of water samples, and is only suitable for fixed-point sampling activities. Utility model patent 2011200497373.X provides a water quality sampler, including a kettle and a pole. The kettle is set at the lower end of the pole. The pole is divided into a base pole, a primary pole and a secondary pole. One end is inserted into one end of the first-level pole and slidably connected with it, the other end of the first-level pole is inserted into one end of the base pole and slidably connected with it, and a locking sleeve is provided at the joint of the pole; the kettle is set on the first-level the other end of the rod. Compared with the prior art, this sampler has the characteristics of reasonable design, simple structure, convenient use, convenient carrying, and improved work efficiency. However, this device needs to manually put the entire sampler into water repeatedly for sampling, and cannot continuously Automatic collection, and it is not convenient to collect a large number of water samples, it is only suitable for fixed-point sampling activities. Utility model patent 201120108393.X discloses a fixed-point sampler for water quality. It has a cylinder with a water inlet at the bottom and a drain at the top. The inner surface of the bottom of the cylinder is provided with an inlet valve covering the water inlet. There is a drain valve covering the drain port, the upper end of the cylinder is connected to the handle through the hanging noses on both sides, and a connecting rod is connected between the water inlet valve and the drain valve. The utility model has the advantages of simple structure, easy operation, high accuracy of fixed-point water sample collection, and is convenient for water quality inspection departments to use, but the sampler is only suitable for fixed-point sampling, not suitable for continuous automatic water sample collection under high-speed moving state.

The above-mentioned existing water sample sampling device or equipment can only perform manual fixed-point sampling, and manual water sample collection can only be implemented when the sampling carrier is stationary or moving at a low speed. The simultaneous determination of water quality indicators cannot be realized. In addition, when the water quality measurement probe is placed in the water, it is difficult to keep the probe at a fixed depth due to the high-speed movement of the vehicle or the high flow velocity of the water quality detection probe. accuracy. It is impossible to quickly, accurately, and continuously collect water samples at a fixed water depth, and perform accurate online simultaneous determination of the spatial distribution of water quality indicators at this depth.

Therefore, in order to quickly, accurately and continuously collect water samples at fixed water depths on the surface of the water body, and perform accurate online simultaneous measurement of the spatial distribution of water quality indicators at this place, it is necessary to develop a simple and easy-to-operate, easy-to-install and use in the field, especially suitable for Automatic water sample collection device and water quality measurement system for high-speed movement or high-speed water flow conditions.

Invention content:

The present invention aims at the problems existing in the above-mentioned prior art, and provides a continuous automatic water sample collector and a water quality measurement system. The water sample collector of the present invention is simple in structure, easy to operate, easy to use, and is suitable for field environments such as rivers, lakes, and reservoirs. On-site characteristics, the water quality measurement system has high accuracy and reliability of the measurement results, especially suitable for water sample collection and water quality measurement under the condition of high-speed movement or high-speed water flow, without external power, accurate online monitoring of water quality indicators at the sampling position Simultaneous determination.

In order to achieve the purpose of the present invention, the present invention provides a water sample collector on the one hand, including the water collector which is arranged in the water body and collects water samples; Storage tank for collected water samples.

Wherein, a flexible guide pipe is also included, which is connected between the water diversion pipe and the water storage tank, so as to guide the water sample in the water diversion pipe to the water storage tank.

In particular, the guide tube is a soft conduit, which can facilitate the free placement of the water storage.

Wherein, the water diversion pipe includes a horizontal section connected to the water collector and a bent section forming an angle α greater than 90° with the horizontal section.

In particular, the angle α is preferably 120° to 135°.

In particular, one end of the water diversion pipe is a straight horizontal section parallel to the water level, and the other end is a bent section extending out of the water surface. The angle between the horizontal section of the water diversion pipe and the bent section is α>90°, preferably 120-135°.

In particular, the horizontal section of the water diversion pipe is connected to the small end of the water collector.

Wherein, the water collector is coaxial with the horizontal section of the water diversion pipe, and the coaxiality of the water collector and the horizontal section of the water diversion pipe can effectively reduce the kinetic energy loss of the water flow.

In particular, the diameter of the small end of the water collector is the same as the diameter of the horizontal section of the water diversion pipe.

Wherein, the water collector is in the shape of a truncated cone with a large end and a small end, the large end is for water samples to flow in, and the small end is connected to the water diversion pipe.

In particular, the cone angle of the frusto-conical water collector is ≤45°, preferably 22.5-35°.

In particular, the small end (horn neck or water outlet) of the frusto-conical water collector is fixedly connected to the water diversion pipe. The large end of the frusto-conical water collector (ie the bell mouth or water inlet) is remote from the water pipe and is used to collect water samples in moving or flowing water.

In particular, the fixed connection is welding, riveting, screw connection or buckle connection.

Wherein, a water inlet is provided at a position close to the bottom of the water storage tank body for allowing the collected water sample lifted through the water diversion pipe to flow into the water storage tank.

In particular, the water sample collected by the water collector is introduced into the water storage tank through the water inlet pipe through the water inlet.

In particular, the water sample collected by the water collector is introduced into the water storage tank through the water diversion pipe and the guide pipe through the water inlet.

In particular, a one-way check valve is installed at the water inlet to prevent backflow of the water sample entering the water storage tank.

In particular, a water inlet pipe is also connected to the water inlet, and the guide pipe is connected to the water inlet pipe, so that the collected water sample lifted through the water diversion pipe flows into the water storage tank.

Wherein, an overflow pipe is provided on the upper part of the water storage tank for discharging the water samples in the water storage tank; a socket into which a probe can be inserted is provided on the top of the water storage tank.

In particular, a horizontal conduit is also included, and the horizontal conduit is connected between the water diversion pipe and the diversion pipe.

Wherein, one end of the horizontal conduit is connected to the end of the water diversion pipe, that is, to the end of the bent section of the water diversion pipe, and the other end is connected to the diversion pipe.

In particular, an elbow is also included between the water diversion pipe and the horizontal conduit, one end of the elbow is connected to the end of the water diversion pipe, that is, it is connected to the end of the bent section of the water diversion pipe, and the other end is connected to the end of the bend section of the water diversion pipe. The horizontal conduit connection.

The horizontal conduit is used to lead the water sample after the water diversion pipe is lifted from the end of the water diversion pipe, and then lead it into the water storage tank installed on the sampling carrier through the diversion pipe, and can also be used as a fixing device for the water sample collector , for example: when used on a sampling ship, the diversion pipe is located outside the ship’s side, and the horizontal pipe can be placed and fixed on the ship’s side, thereby fixing the position of the entire water sample collector; according to the site conditions, when other fixing means are used, Also can not use this horizontal guide pipe and elbow, and directly connect the guide pipe and the water diversion pipe end.

In particular, leak-proof clips are used to tightly fix the connections between the diversion pipe and the horizontal conduit, and between the diversion pipe and the water inlet pipe of the water reservoir, so as to prevent water samples from leaking at the pipe joints.

Another aspect of the present invention provides a water sample collector, including the following sequential connection devices: a water collector, a water diversion pipe, a diversion pipe, and a water storage tank, wherein:

The water collector is arranged in the water body and collects water samples in the water body;

The water diversion pipe is used to raise the water sample collected by the water collector above the water surface;

A draft tube for introducing the water sample in the water diversion tube into the water storage tank;

Water storage tanks for storing collected water samples.

Wherein, the water collector is in the shape of a truncated cone with a large end and a small end (that is, a truncated cone or a trumpet shape), the large end of which is supplied with water samples, and the small end of which is connected to the water diversion pipe.

In particular, the cone angle of the frusto-conical water collector is ≤45°, preferably 22.5-35°.

In particular, the small end (horn neck or water outlet) of the frusto-conical water collector is fixedly connected to the water diversion pipe. The large end of the frusto-conical water collector (ie the bell mouth or water inlet) is remote from the water pipe and is used to collect water samples in moving or flowing water.

In particular, the fixed connection is welding, riveting, screw connection or buckle connection.

The water collector is in the shape of a truncated cone with a large end and a small end (that is, a conical shape or a trumpet shape), which can effectively reduce the local kinetic energy loss when the water flow enters the water diversion pipe.

In particular, the kinetic energy loss of the water flow between the large end of the truncated conical water collector (ie, the water inlet) and the small end (ie, the horn neck) is closely related to its cone angle. If the cone angle is large, the water flow will The loss of kinetic energy is large, so in order to reduce the loss of water kinetic energy, the cone angle of the water collector should be ≤45°, more preferably 22.5-35°.

Wherein, the water diversion pipe includes a horizontal section connected to the water collector and a bent section forming an angle α greater than 90° with the horizontal section.

In particular, the angle α is preferably 120° to 135°.

In particular, one end of the water diversion pipe is a straight horizontal section parallel to the water level, and the other end is a curved section extending out of the water surface. The angle between the horizontal section of the curved pipe and the curved section is >90°, preferably 120-135°.

In particular, the horizontal section of the water diversion pipe is connected to the small end of the water collector.

Wherein, the water collector is coaxial with the horizontal section of the water diversion pipe, and the coaxiality of the water collector and the horizontal section of the water diversion pipe can effectively reduce the kinetic energy loss of the water flow.

In particular, the diameter of the small end of the water collector is the same as the diameter of the horizontal section of the water diversion pipe.

After the water sample collected by the water collector enters the water diversion pipe, when it flows at high speed in the diversion pipe, the bending of the water diversion pipe and the sudden change of the cross section will change the flow velocity, flow direction and pressure distribution of the water sample fluid in the pipe, thus in the diversion pipe. The flow separation occurs on the pipe wall of the water pipe, and a vortex zone is formed between the main flow and the side wall, resulting in loss of kinetic energy. In order to reduce the kinetic energy loss of the water sample as much as possible, the water diversion pipe is an elbow with straight circular pipes in the front and rear without hard joints.

Because the elbow will cause the kinetic energy loss of the water flow, and the smaller the angle between the front and rear sections of the pipe bend, the greater the kinetic energy loss of the water flow. Therefore, the angle α of the water diversion pipe should be >90°, and more preferably 120-135°.

When the bending angle α of the water diversion pipe is less than 90°, the local kinetic energy loss of the water flow at the turn is large; and when the bending angle α is greater than 135°, the length of the bending section required to lead the water sample to the same height is longer , so that the kinetic energy loss of the water sample during the flow process is large, and it is not easy to install and use on site. When the bending angle α is between 120° and 135°, it can not only reduce the local kinetic energy loss of the water flow at the bend of the elbow, but also ensure that the flow length of the water sample in the bend section of the elbow is appropriate, reducing the flow of water samples along the bend. Kinetic energy loss in the flow process.

Wherein, one end of the guide pipe is connected to the water diversion pipe, and the other end is connected to the bottom of the water storage tank, and the collected water samples are introduced into the water storage tank from the bottom of the water storage tank.

In particular, the guide tube is a soft conduit, which can facilitate the free placement of the water storage.

Wherein, the tank body of the water storage tank is provided with a water inlet near the bottom, and the guide pipe is connected with the water storage tank through the water inlet to introduce water samples into the water storage tank.

In particular, a one-way check valve is installed on the inner side of the water inlet of the water storage tank to prevent the backflow of the water sample entering the water storage tank.

In particular, a water inlet pipe is also connected to the water inlet, and the guide pipe is connected to the water inlet pipe.

In particular, an overflow pipe is provided on the upper part of the water storage tank for discharging the water sample in the water storage tank.

In particular, a horizontal conduit is also included between the water diversion pipe and the diversion pipe, one end of the horizontal conduit is connected to the end of the water diversion pipe, that is, connected to the end of the bent section of the water diversion pipe, and the other end Connect with the guide tube.

In particular, an elbow is also included between the water diversion pipe and the horizontal conduit, one end of the elbow is connected to the end of the water diversion pipe, that is, it is connected to the end of the bent section of the water diversion pipe, and the other end is connected to the end of the bend section of the water diversion pipe. The horizontal conduit connection.

The horizontal conduit is used to lead the water sample after the water diversion pipe is lifted from the end of the water diversion pipe, and then lead it into the water storage tank installed on the sampling carrier through the diversion pipe, and can also be used as a fixing device for the water sample collector , for example: when used on a sampling ship, the diversion pipe is located outside the ship’s side, and the horizontal pipe can be placed and fixed on the ship’s side, thereby fixing the position of the entire water sample collector; according to the site conditions, when other fixing means are used, For example, when directly fixing the bent end of the water diversion pipe, the horizontal conduit and the elbow may not be used, and the diversion pipe is directly connected to the end of the water diversion pipe.

In particular, leak-proof clips are used to tightly fix the connections between the diversion pipe and the horizontal conduit, and between the diversion pipe and the water inlet pipe of the water reservoir, so as to prevent water samples from leaking at the pipe joints.

In particular, the water sample collector is used under the condition that the water collector moves at a high speed or the flow speed of the sampled water sample is high.

In particular, when the relative speed between the water collector of the water sample collector and the water flow in the water body is ≥5 m/s, preferably 5-10 m/s, the water sample collector automatically and continuously collects water samples, that is, the water collection When the speed of the device and the relative speed of the water flow in the water body are greater than or equal to 5 m/s, preferably 5-10 m/s, the water sample collector automatically and continuously collects water samples.

In yet another aspect, a water quality detection system is provided, comprising the above-mentioned water sample collector and a water quality detection probe placed in a water storage tank of the water sample collector.

Wherein, the test site at the top of the water quality detection probe is located at the bottom of the water storage tank, and is used to measure the water quality of the water samples collected in the water storage tank.

Wherein, a socket into which a probe can be inserted is provided on the top of the water storage tank.

In particular, a detachable top cover is installed on the top of the water storage tank.

In particular, the top cover is provided with a socket for placing the water quality detection probe, and the water quality detection probe is placed in the water storage tank through the socket, so that the test site at the top of the probe is located in the water storage tank. bottom of.

Another aspect provides a water quality detection system, including a water sample collector and a water quality detection probe, and the water sample collector includes the following sequential connection devices: a water collector, a water diversion pipe, a diversion pipe, and a water storage tank, wherein

The water collector is arranged in the water body and collects water samples in the water body;

The water diversion pipe is used to raise the water sample collected by the water collector above the water surface;

A draft tube for introducing the water sample in the water diversion tube into the water storage tank;

Water storage tanks for storing collected water samples;

The water quality detection probe is placed in the water storage tank, and the test site at the top of the probe is located at the bottom of the water storage tank, and is used to measure the water quality of the water samples collected in the water storage tank.

Wherein, the water collector is in the shape of a truncated cone with a large end and a small end (that is, a truncated cone or a trumpet shape), the large end of which is supplied with water samples, and the small end of which is connected to the water diversion pipe.

In particular, the cone angle of the frusto-conical water collector is ≤45°, preferably 22.5-35°.

In particular, the small end (horn neck or water outlet) of the frusto-conical water collector is fixedly connected to the water diversion pipe. The large end of the frusto-conical water collector (ie the bell mouth or water inlet) is remote from the water pipe and is used to collect water samples in moving or flowing water.

In particular, the fixed connection is welding, riveting, screw connection or buckle connection.

The water collector is in the shape of a truncated cone with a large end and a small end (that is, a conical shape or a trumpet shape), which can effectively reduce the local kinetic energy loss when the water flow enters the water diversion pipe.

In particular, the kinetic energy loss of the water flow between the large end (that is, the water inlet) and the small end (that is, the horn neck) of the truncated conical water collector is closely related to its cone angle. If the cone angle is large, the kinetic energy of the water flow will The loss is large, so in order to reduce the loss of water flow energy, the cone angle of the water collector should be ≤ 45°, more preferably 22.5-35°.

Wherein, the water diversion pipe includes a horizontal section connected to the water collector and a bent section forming an angle α greater than 90° with the horizontal section.

In particular, the angle α is preferably 120° to 135°.

In particular, one end of the water diversion pipe elbow is a straight horizontal section parallel to the horizontal plane, and the other end is a bent section extending out of the water surface. The angle between the horizontal section of the elbow and the bent section is α>90°, preferably 120-135°.

In particular, the horizontal section of the water diversion pipe is connected to the small end of the water collector.

Wherein, the water collector is coaxial with the horizontal section of the water diversion pipe.

In particular, the diameter of the small end of the water collector is the same as the diameter of the horizontal section of the water diversion pipe.

Wherein, one end of the guide pipe is connected to the water diversion pipe, and the other end is connected to the bottom of the water storage tank, and the collected water samples are introduced into the water storage tank from the bottom of the water storage tank.

In particular, the guide tube is a soft conduit, which can facilitate the free placement of the water storage.

Wherein, the tank body of the water storage tank is provided with a water inlet near the bottom, and the guide pipe is connected with the water storage tank through the water inlet to introduce water samples into the water storage tank.

In particular, a one-way check valve is installed on the inner side of the water inlet of the water storage tank to prevent the backflow of the water sample entering the water storage tank.

In particular, a water inlet pipe is also connected to the water inlet, and the guide pipe is connected to the water inlet pipe.

In particular, an overflow pipe is provided on the upper part of the water storage tank for discharging the water sample in the water storage tank.

Wherein, a detachable top cover is installed on the top of the water storage tank.

In particular, the top cover is provided with a socket for placing the water quality detection probe, and the water quality detection probe is placed in the water storage tank through the socket, so that the test site at the top of the probe is located in the water storage tank. bottom of.

The water sample collected by the water collector enters the water storage tank from the bottom of the water storage tank, and flows out from the overflow pipe at the top of the water storage tank. The inner flow is upward, and the test site of the water quality detection probe is located at the bottom of the water storage tank, which ensures that the water quality detection probe measures the water quality of the water sample newly entering the water storage tank.

In particular, a horizontal conduit is also included between the water diversion pipe and the diversion pipe, one end of the horizontal conduit is connected to the end of the water diversion pipe, that is, connected to the end of the bent section of the water diversion pipe, and the other end Connect with the guide tube.

The horizontal conduit is used to lead the water sample after the water diversion pipe is lifted from the end of the water diversion pipe, and then lead it into the water storage tank installed on the sampling carrier through the diversion pipe, and can also be used as a fixing device for the water sample collector , for example: when used on a sampling ship, the diversion pipe is located outside the ship’s side, and the horizontal pipe can be placed and fixed on the ship’s side, thereby fixing the position of the entire water sample collector; according to the site conditions, when other fixing means are used, Also can not use this horizontal guide pipe and elbow, and directly connect the guide pipe and the water diversion pipe end.

In particular, an elbow is also included between the water diversion pipe and the horizontal conduit, one end of the elbow is connected to the end of the water diversion pipe, that is, it is connected to the end of the bent section of the water diversion pipe, and the other end is connected to the end of the bent section of the water diversion pipe. The horizontal conduit connection.

In particular, leak-proof clips are used to tightly fix the connections between the diversion pipe and the horizontal conduit, and between the diversion pipe and the water inlet pipe of the water reservoir, so as to prevent water samples from leaking at the pipe joints.

In particular, the water sample collector is used under the condition that the water collector moves at a high speed or the flow speed of the sampled water sample is high.

In particular, when the relative speed between the water collector of the water sample collector and the water flow in the water body is ≥5 m/s, preferably 5-10 m/s, the water sample collector automatically and continuously collects water samples, that is, the water collection When the speed of the device and the relative speed of the water flow in the water body are greater than or equal to 5 m/s, preferably 5-10 m/s, the water sample collector automatically and continuously collects water samples.

In particular, the water quality detection system is used under the condition that the water collector of the water sample collector moves at high speed or the flow speed of the sampled water sample is high.

In particular, when the relative speed between the water collector of the water sample collector and the water flow in the water body is ≥5 m/s, preferably 5-10 m/s, the water sample collector automatically and continuously collects water samples, that is, the water collection When the speed of the device and the relative speed of the water flow in the water body are greater than or equal to 5 m/s, preferably 5-10 m/s, the water sample collector automatically and continuously collects water samples.

The water sample collector and water quality detection system of the present invention can be widely used in the continuous automatic collection of water samples and the synchronous measurement of water quality parameters in the state of high-speed movement in natural water bodies such as rivers, lakes and reservoirs, and can also be used for fixed points under high-speed water flow conditions Water sample collection and water quality parameter measurement have good application prospects in water environment monitoring and water pollution prevention and control. The water sample collector and water quality monitoring system of the present invention have the following advantages:

1. The device of the present invention is simple in structure, easy to install and easy to operate, the depth of water sample collection is stable, easy to control, and the detection results of water quality indicators are accurate.

2. The device of the present invention can realize fast, accurate and continuous automatic collection of water samples at various water depths on the surface of the water body, and perform accurate online simultaneous measurement of the spatial distribution of water quality indicators at the depth, which is beneficial to the spatial distribution of water quality Situation analysis and research.

3. The water sample collector of the present invention can automatically collect water samples in a moving state or on a water flow with a high flow rate, without manually applying other power, and automatically collects water samples by using the movement of the sampling carrier or the flowing kinetic energy of the water body. The water sample is automatically collected by using the relative kinetic energy of the water flow and the collector, and the water sample can be collected continuously. It is suitable for use in field environments, especially for use under high-speed movement or high-speed water flow conditions.

4. The scale mark on the water diversion pipe of the water sample collector of the present invention is the depth mark of the water collector of the collector going deep into the water body, which facilitates the accurate determination of the sampling water depth when the water sample is collected on the spot, and ensures the continuous collection of water samples. The depth will not change significantly, realizing the accurate collection of water samples at a fixed water depth.

5. The water quality detection probe of the water quality detection system of the present invention is always placed in the water sample storage tank of the water collector, in contact with the fresh water samples entering the storage tank continuously, real-time and synchronous detection of the water quality of the water samples entering the storage tank, and the water quality measurement probe It is connected with the water quality index recording equipment to realize the unattended automatic measurement and recording of the water quality index.

Description of drawings:

Fig. 1 is a schematic structural diagram of an embodiment of a water sample collector and a water quality measurement system of the present invention;

Fig. 2 is a schematic diagram of the connection of the water collector and the water diversion pipe shown in Fig. 1;

Fig. 3 is a schematic top view of the water collector, water diversion pipe, elbow and horizontal conduit shown in Fig. 1;

Fig. 4 is a structural schematic diagram of another embodiment of the water sample collector and the water quality measurement system of the present invention.

Explanation of reference signs: 1. Water collector; 11. Bottom of water collector; 12. Top of water collector; 2. Water diversion pipe; 21. Horizontal section; 22. Bending section; 3. Elbow; 4. Horizontal conduit ;5, leak-proof clip; 6, diversion pipe; 7, water storage tank; 71, water inlet; 72, one-way check valve; 73, overflow pipe; 74, water inlet pipe; 75, top cover; 76 , socket; 8, water quality detection probe.

Detailed ways:

The present invention will be further described below in conjunction with specific embodiments, and the advantages and characteristics of the present invention will become clearer along with the description. However, these embodiments are only exemplary and do not constitute any limitation to the scope of the present invention. Those skilled in the art should understand that the details and forms of the technical solutions of the present invention can be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the protection scope of the present invention.

As shown in Figures 1, 2, and 3, the automatic water sample collector of the present invention is connected in sequence by a water collector 1, a water diversion pipe 2, a 90° elbow 3, a horizontal conduit 4, a diversion pipe 6, and a water storage tank 7. become.

The water collector 1 is used to collect water samples in the water body, and is in the shape of a truncated cone (that is, a truncated cone or a trumpet shape) with a large end and a small end; Water sample inlet or bell mouth) faces the direction of water flow, that is, the direction of the big end 11 of the water collector is opposite to the direction of water flow, and the water sample enters from the bottom 11 of the water collector during the movement of the carrier or in the flowing water body Water collector; enter the water diversion pipe 2 from the small end 12 of the truncated conical water collector (that is, the water sample outlet or horn neck of the water collector).

The water collector 1 is in the shape of a truncated cone with a large end and a small end, which can reduce the loss of local kinetic energy when the water sample enters the water collector 1. , the flow rate and pressure of the water sample are increased, that is, the kinetic energy of the water sample is increased, which is conducive to lifting the water sample above the water surface.

The inner wall of the water diversion pipe 2 including the horizontal section 21 connected to the water collector and the bent section 22 forming an angle α greater than 90° with the horizontal section is smooth and hard, and the water sample collected by the water collector is lifted above the water surface , that is, to lift the water sample in the water body above the water surface. The horizontal section 21 of the water diversion pipe 2 is straight and horizontal, and is parallel to the water surface; the bent section 22 protrudes from the water surface, and the water sample collected by the water collector 1 at a certain depth is lifted to the water surface of the water body through the water diversion pipe 2 , in order to carry out water quality testing above the water surface. The angle α between the horizontal section 21 and the bent section 22 of the water diversion pipe 2 is >90°.

The bending section 22 of the water diversion pipe 2 is marked with a scale, which is used to mark the depth of the horizontal section 21 of the water diversion pipe 2 below the water surface of the water body and the water collector 1 below the water surface, which is the depth of the water collector when collecting water samples. 1 Submersion depth in a body of water. When collecting water samples, if you need to collect water samples at water depths of 1 meter, 3 meters, and 10 meters, you only need to make the water surface level with the scales of 1 meter, 3 meters, and 10 meters respectively to ensure continuous water collection. The sample depth does not change significantly.

The scale marks on the bend section 22 of the water diversion pipe 2 are calculated according to the height calculation formula of the right triangle to obtain the vertical distance from the horizontal section 21 of the corresponding water diversion pipe 2 to the water body horizontal plane, and the calculation formula is as shown in formula (1):

H＝L*sin(180°-α) (1)

Wherein, the range of the bending angle α of the water diversion pipe 2 is >90°, preferably 120-135°;

H is the vertical distance from the horizontal section 21 of the water diversion pipe 2 to the water body level, that is, the water depth of the water sample collected by the water collector;

L is the length that the bent section 22 of the water diversion pipe 2 extends into the water body.

The horizontal section 21 of the water diversion pipe 2 and the top 12 of the water collector 1 are fixed together by means of welding, riveting, threading or buckling. The water collector 1 is coaxial with the horizontal section 21 of the water diversion pipe, and the diameter of the top 12 of the water collector is the same as that of the horizontal section 21 of the water diversion pipe.

In the embodiment of the present invention, the horizontal section 21 of the water diversion pipe 2 is welded into one body with the top 12 of the water collector 1 and fixedly connected.

One end of the horizontal conduit 4 is connected to the bending section 22 of the water diversion pipe 2, and the other end is connected to one end of the draft tube 6, and both ends are sealed with leak-proof clips 5 to prevent leakage of water samples.

In the present invention, the end of the bending section 22 of the water diversion pipe can also not be connected to the horizontal conduit 4, and the bending section 22 of the water diversion pipe 2 is directly connected with one end of the draft pipe 6, and the water sample in the water diversion pipe 2 It is directly introduced into the guide tube 6, and the water sample is sent into the water storage tank through the guide tube 6, as shown in FIG. 4 .

In the embodiment of the present invention, in order to facilitate installation and use, an elbow 3 is also installed between the water diversion pipe 2 and the horizontal conduit 4, and one end of the elbow 3 is connected with the end of the water diversion pipe 2, that is, with the bend of the water diversion pipe 2. The ends of the folded sections 22 are connected, and the other end is connected with the horizontal conduit 4 , so that the water flow channel is smooth, and the water sample is introduced into the horizontal conduit 4 . In addition to selecting the 90° elbow for the elbow, other elbows are applicable to the present invention.

The guide tube 6 is a soft pipe, which is conducive to the free and convenient placement of the water storage tank 7 connected with the guide tube 6 according to local conditions. One end of the diversion tube 6 is connected to the horizontal conduit 4, and is sealed by the leak-proof clip 5 to prevent leakage of the water sample; the other end of the diversion tube 6 is sealed to the water storage tank 7, and the collected water samples are introduced into the water storage tank 7.

The water storage tank 7 is cylindrical and is used to hold the collected water samples. Offer water sample water inlet 71 near the bottom at water storage tank 7 tank bodies, offer the inboard of water inlet 71 at water storage tank 7 tank bodies and install the one-way check valve 72 that prevents the backflow of the water sample that enters in the water storage tank; The upper part of the tank body of the water storage tank 7 is provided with an overflow pipe 73 for discharging redundant water samples in the water storage tank.

The outer side of the water inlet 71 is provided in the water storage tank 7, and the water inlet pipe 74 is sealed and connected, and the diversion pipe 6 is connected with the water inlet pipe 74, and the water sample is introduced into the water storage tank 7, and the diversion pipe 6 and the water inlet pipe 74 are leak-proof Clip 5 is sealed.

In the present invention, except for the cylindrical shape, any other shape of the water storage tank is applicable to the present invention, such as cuboid, cube, spherical and so on.

As shown in Figure 1, the water quality testing system of the present invention includes a water sample collector and a water quality testing probe 8, wherein the water sample collector includes the following sequential connection devices: a water collector 1, a water diversion pipe 2, a horizontal conduit 4, Guide tube 6, water storage tank 7; the water quality detection probe 8 is placed in the water storage tank 7, and the test site at the top of the water quality detection probe 8 is located at the bottom of the water storage tank 7, and is used to measure the water collected in the water storage tank. The water quality within 7.

In the present invention, the water quality detection probe 8 can be directly placed in the water storage tank 7. In order to make the water quality detection probe 8 more stable in the case of a moving carrier or a high water flow rate, the embodiment of the present invention is placed in the water storage tank 7. A detachable top cover 75 is installed on the top, and a socket 76 for placing the water quality detection probe 8 is opened on the top cover 75 . The water quality detection probe 8 is placed in the water storage tank 7 through the socket 76, and the test site at the top of the water quality detection probe 8 is placed on the bottom of the water storage tank 7, avoiding the water quality detection probe Strong water impact when placed directly in a body of water.

Because the water sample enters from the bottom of the water storage tank 7 and flows out from the top overflow pipe, the water sample that enters the water storage tank pushes the water sample that entered first to flow upward in the water storage tank, and the test site of the water quality detection probe is located at The bottom of the water storage tank ensures that the value measured by the probe is the water quality of the latest water sample entering the water storage tank.

In addition, the horizontal cross-sectional area of the water storage tank 7 is much larger than the cross-sectional area of the water inlet, so when the water sample flows up in the water storage tank 7, its rising velocity is much smaller than the water flow velocity in the water body, and the water quality detection probe 8 will not be affected by the water flow. The impact is always positioned at the bottom of the water storage tank 7 without floating up and down, thus ensuring that the water quality detection probe 8 always measures the water quality of the latest water sample entering the water storage tank.

The water quality detection probe 8 is connected to the water quality parameter recording instrument through the data communication transmission cable, and saves and records the water quality data obtained by real-time measurement for subsequent water sample quality analysis. In this way, fast, accurate and continuous automatic collection of water samples at a fixed water depth on the surface of the water body is realized, and accurate online and simultaneous determination of the spatial distribution of water quality indicators at the depth is carried out, which is beneficial to the analysis and research of the spatial distribution of water quality.

In the embodiment of the present invention, in order to facilitate the connection between the water diversion pipe 2 and the horizontal conduit 4, an elbow 3 is used for connection between the water diversion pipe 2 and the horizontal conduit 4, and a 90° elbow is used for connection in order to facilitate installation and use. Depending on the situation on site, it is also possible to directly connect the draft pipe 6 to the bent section 22 of the water diversion pipe 2 without using the elbow 3 and the horizontal conduit 4 .

The cone angle of the truncated conical water collector 1 in the present invention is ≤45°, preferably 22.5-35°; the bending angle of the rigid elbow 2 is >90°, preferably 120-135°; The soft draft pipe 6 is a soft plastic pipe, which facilitates the free placement of the water storage tank 7 according to the local conditions.

The working principle of water sample collector and water quality detection system of the present invention is as follows:

Under the high-speed moving state of the sampling carrier or in the water flow with a certain water velocity, the water collector 1 and the water diversion pipe 2 of the water sample collector of the present invention are placed at a certain depth on the surface of the water body, and the horizontal section 21 of the water diversion pipe 2 Parallel to the horizontal plane of the water body, the bending section 22 partially protrudes from the water surface, and the big end 11 of the water collector 1 (that is, the bell mouth or the water flow inlet) faces the direction of the water flow, and the water flow has a certain relative speed with respect to the water sample collector. When the relative speed is greater than or equal to 5 m/s, the water flow entering the water collector 1 has relatively high kinetic energy, and because the water collector 1 is frusto-conical in shape, from the large end 11 to the small end 12 of the water collector 1 The cross-sectional area of the flow is reduced, and the flow velocity and dynamic pressure are further increased. The water flow with increased kinetic energy and flow velocity enters the bending section 22 along the horizontal section 21 of the water diversion pipe 2, lifts the water sample above the water surface, and enters the horizontal conduit 4. Then, it enters the soft draft tube 6, then flows into the water storage tank 7, and the water body water sample is collected in the water storage tank 7. The sampling carrier is constantly moving or the water body is constantly flowing, and the collected water samples are continuously and automatically guided into the water storage tank 7 to obtain continuously and automatically collected water samples.

When collecting water samples during the moving process of the sampling carrier, put the water collector 1 and the water diversion pipe 2 into the water body, and make the direction of the big end 11 of the water collector 1 consistent with the moving direction of the sampling carrier. When the tool moves, the water sample in the water body flows into the water collector against the big end 11 of the water collector 1 (that is, the water sample inlet or bell mouth of the water collector). After the water collector 1 penetrates into the water body to a certain depth, the water diversion pipe 2 is fixed on the sampling vehicle, so that the sampling depth of the water collector 1 is constant, and when the sampling carrier moves, the water collector 1 and the water diversion pipe 2 are driven at the same speed. Moving, the relative speed of the sampling carrier relative to the water body is the relative speed of the water collector 1 relative to the water flow in the water body during the water sample collection process. For example, when collecting water samples in a lake, the flow velocity of the water in the lake is 0, and the moving speed of the sampling vehicle when collecting water samples in the lake is 7 m/s, then the relative velocity of the water collector and the water flow in the water body during the sampling process is 7 m/s.

When collecting water samples in a flowing water body, put the water collector 1 and the water diversion pipe 2 into the water body, and make the big end 11 of the water collector 1 face the direction of the water flow of the water body, that is, the big end 11 of the water collector 1 ( That is, the water sample inlet or bell mouth of the water collector is against the direction of the water flow (that is, the big end 11 of the water collector 1 faces or faces the direction of the water flow), and the flowing water flows into the big end 12 of the water collector 1 water collector. If the sampling water collector does not move, the flow velocity of the flowing water body is the relative speed of the water collector 1 relative to the water flow in the water body during the water sample collection process; if the sampling water collector moves, the flow velocity of the flowing water body is the same as The sum of the moving speeds of the water collectors is the relative speed of the water collector 1 relative to the water flow in the water body during the water sample collection process. For example, when collecting sewage water samples in the water inlet distribution channel of the sewage treatment plant, the flow velocity of the sewage is 7 m/s, if the water collector placed in the water inlet distribution channel does not move, that is, the speed of the water collector is 0, then During the sampling process, the relative speed between the water collector and the water flow in the water body is 7 m/s; if the water collector placed in the distribution channel moves against the direction of the water flow at a speed of 2 m/s, the water collector The relative velocity to the current in the water body is 9 m/s.

During the water sample collection process, the relative speed of the water flow in the water body relative to the water collector is ≥ 5 m/s, preferably 5-10 m/s, that is, the relative velocity of the water flow in the water body to the water collector of the water sample collector Speed ≥ 5 m/s, preferably 5-10 m/s, to ensure that the water samples collected by the water collector 1 during the movement of the sampling carrier can be continuously lifted above the surface of the water body and placed on the carrier In the upper water storage tank 7, water sample water quality analysis and detection are carried out.

The water sample flows into the water storage tank 7 continuously, and the water sample continuously rises in the water storage tank 7 and is discharged from the overflow pipe 73 . Since the water sample inlet 71 is located near the bottom of the water storage tank 7, when the water sample rises and flows in the water storage tank 7, the water sample that first enters the water storage tank 7 will be passed by the water sample that enters the water storage tank. Push upwards gradually, when the water surface of the water sample that first flows into the water storage tank 7 reaches and exceeds the height of the overflow pipe 73, it will be discharged through the overflow pipe 73 gradually.

As the water surface in the water storage 7 rises, or when the relative velocity of the water flow decreases, causing the total pressure of the water flow to drop through the pipeline to be lower than the static pressure in the water storage, the one-way check valve 8 is closed to prevent The collected water samples flow back through the tubing.

After the water sample enters the water storage tank 7 from the bottom of the water storage tank 7, the water quality detection probe 8 placed in the water storage tank 7 continuously, automatically and synchronously monitors various water quality indicators (such as water temperature, dissolved oxygen and chlorophyll content, etc.) For measurement, because the test site of the water quality detection probe 8 is located at the bottom of the water storage tank 7, the water quality detection probe 8 can continuously, automatically, and real-time measure the water quality index of the latest water sample flowing into the water storage tank 7.

The water quality detection probe 8 is connected to the water quality parameter recording instrument through the data communication transmission cable, and saves and records the water quality data obtained by real-time measurement for subsequent water sample quality analysis.

Example 1

Use the water sample collector shown in Figure 1 to collect water samples at a depth of 1 meter in the lake, and use the water quality measurement system of the present invention to simultaneously measure the water quality indicators of the water samples.

In this example, the sampling carrier is a sampling ship, and the moving speed of the sampling ship is 6 m/s (the moving speed of the sampling ship can also be more than 5 m/s, preferably 5-10 m/s); the water storage tank 7 is placed In the sampling ship; the water collector 1 and the horizontal section 21 of the water diversion pipe 2 are fixedly connected by welding, the water collector 1 and the horizontal section 21 of the water diversion pipe 2 are coaxial, and the diameter of the small end 12 of the water diversion device 1 is the same as that of the water diversion pipe The diameter of the horizontal section 21 of 2 is the same; the horizontal conduit 4 is connected and sealed with the bending section 22 of the water pipe 2 through the 90° elbow 3; 4. The water inlet pipe 74 is sealed and connected; the water inlet pipe 74 is connected to the water storage tank 7 through the water inlet 71; the water quality detection probe 8 is inserted into the water storage tank 7 through the socket 76 on the detachable top cover 75 at the top of the water storage tank 7 , and make the test site at the top of the probe be located at the bottom of the water storage tank 7 .

The horizontal section 21 of the water diversion pipe 2 of the water sample collector of the present invention, part of the bending section 22 and the water collector 1 are put into the lake from the starboard side of the sampling carrier ship, so that the horizontal section 21 of the water diversion pipe 2 is in contact with the water surface of the lake. Keep parallel, and make its horizontal section 21 and the water collector 1 be positioned at the depth of 1 meter below the lake water, and make the direction of the big end 11 of the water collector 1 (that is, the bell mouth or the water inlet) consistent with the direction in which the sampling ship advances. The moving speed of the sampling boat is the moving speed of the water collector 1. Since the water flow in the lake is slow, the water flow velocity is negligible, so the relative speed of the water collector and the water flow in the lake water body during the sampling process is 6 m/s, and the water in the lake The samples automatically and continuously flow into the water collector 1 from the big end 11 of the water collector 1, so that the water samples in the lake continuously and automatically enter the water storage tank 7 to achieve the purpose of collecting water samples.

When the water flow entering the water collector 1 flows from the large end 11 of the water collector 1 to the small end 12, since the cross-sectional area of the water flow is reduced, the flow velocity and dynamic pressure are further increased, and the water flow with increased kinetic energy and flow velocity is The higher relative speed enters the water diversion pipe 2, enters the bending section 22 along the horizontal section 21 of the water diversion pipe 2, flows at a high speed and lifts into the horizontal conduit 4, and then flows through the diversion pipe 6 and the water inlet pipe 74 to enter the water storage tank7.

During the advancing process of the sampling ship, the lake water at a water depth of 1 meter continuously and automatically enters the water storage tank 7 to achieve the purpose of collecting water samples. The water quality detection probe 8 carries out synchronous, automatic, real-time measurement and recording of the water quality indicators (such as water temperature, dissolved oxygen and chlorophyll content, etc.) of the water sample entering the water storage tank 7 .

Except that the lake water at a water depth of 1 meter can be collected, water samples of any other depth can be collected by the collector of the present invention.

The water sample collector of the present invention can be used to collect water samples at any depth under the water body, and the water sample collection depth is preferably ≤10 meters, more preferably ≤5 meters.

Due to the fast flow of water in the pipeline, the total pressure after the pressure drop through the pipeline is greater than the static pressure in the water storage tank, the lake water continuously and automatically enters from the bottom of the water storage tank 7, and the water surface in the water storage tank 7 is continuously When the water surface of the water sample in the water storage tank 7 reaches and exceeds the height of the overflow pipe 73, the water sample is discharged through the overflow pipe 73. As the water level in the water reservoir 7 rises, and when the relative velocity of the water flow decreases, causing the total pressure of the water flow to be lower than the static pressure in the water reservoir after the pressure drop of the pipeline, the one-way check valve 8 is closed to prevent The collected water samples flow back through the tubing.

Example 2

The water sample collector as shown in Figure 1 is used to collect sewage water samples in the water inlet distribution channel of the sewage treatment plant, and the water quality measurement system of the present invention is used to simultaneously measure the water quality indicators of the water samples.

The flow velocity of the sewage in the water distribution channel of the sewage treatment plant is 5 m/s (the flow velocity can also be more than 5 m/s). The water storage tank 7 is placed on the bank of one side of the water distribution channel, and the water collector 1 does not move; the water collector 1 and the horizontal section 21 of the water diversion pipe 2 are fixedly connected by welding, and the level of the water collector 1 and the water diversion pipe 2 The section 21 is coaxial, and the diameter of the top 12 of the water diversion device 1 is the same as the diameter of the horizontal section 21 of the water diversion pipe 2; the horizontal conduit 4 is sealed and connected with the bending section 22 of the diversion pipe 2 through a 90 ° elbow 3; the soft guide The two ends of the flow pipe 6 are respectively sealed and connected to the horizontal conduit 4 and the water inlet pipe 74 through the leak-proof clip 5; the water inlet pipe 74 is connected to the water storage tank 7 through the water inlet 71; the water quality detection probe 8 is detachable through the upper part of the water storage tank 7 The socket 76 on the top cover 75 is inserted into the water storage tank 7, and the test site at the top of the probe is located at the bottom of the water storage tank 7.

Put the horizontal section 21 of the water diversion pipe 2 of the water sample collector of the present invention, part of the bent section 22 and the water collector 1 below the water surface in the water distribution canal, so that the horizontal section 21 of the water diversion pipe 2 is kept parallel to the water surface in the water distribution canal, And make the direction of the big end 11 of the water collector 1 (that is, the bell mouth or the water inlet) opposite to the direction of the sewage water flow, that is, the big end 11 of the water collector 1 (that is, the bell mouth or the water inlet) faces the direction of the sewage water flow, that is, Make the big end 11 of the water collector 1 face the direction of sewage water flow, that is, the direction of the big end 11 of the water collector 1 is opposite to the flow direction of the sewage, and the direction of the big end 11 of the water collector 1 is against the flow direction of the sewage. During the sampling process of the water distribution channel of the sewage plant, the water collector 1 does not move, that is, the moving speed of the water collector 1 is 0, so the relative speed of the water collector and the water flow in the water distribution channel during the sampling process is 5 m/s , the sewage in the distribution channel automatically and continuously flows into the interior of the water collector 1 from the large end 11 of the water collector 1, and then continuously and automatically enters the water storage tank 7 to achieve the purpose of collecting water samples.

When the sewage entering the water collector 1 flows from the large end 11 of the water collector 1 to the small end 12, the flow velocity and dynamic pressure are further increased due to the reduction of the cross-sectional area of the water flow, and the water flow with increased kinetic energy and flow velocity is Higher relative speed enters the water diversion pipe 2, enters the bending section 22 along the horizontal section 21 of the water diversion pipe 2, flows at a high speed and passes through the 90° elbow 3, lifts into the horizontal conduit 4, and then flows through the diversion pipe 6 in sequence , The water inlet pipe 74 enters the water storage tank 7.

Due to the small cross-section of the distribution channel, the sewage flow rate is large and the sewage flow rate is fast. During the sampling process, the high-speed flowing sewage in the water distribution channel continuously and automatically enters the water storage tank 7 . The water quality detection probe 8 performs synchronous, automatic, real-time measurement and recording of the water quality index of the sewage water sample entering the water storage tank 7 .

Due to the fast flow of water in the pipeline, the total pressure after the pressure drop through the pipeline is greater than the static pressure in the water storage tank, the sewage will automatically enter the water storage tank 7 continuously, and the water surface of the water sample in the water sample storage tank 7 will continue to rise , when the water surface of the water sample in the water storage tank 7 reaches and exceeds the height of the overflow pipe 73, the water sample is discharged through the overflow pipe 73. As the water level in the water reservoir 7 rises, and when the relative velocity of the water flow decreases, causing the total pressure of the water flow to be lower than the static pressure in the water reservoir after the pressure drop of the pipeline, the one-way check valve 8 is closed to prevent The collected water samples flow back through the tubing.

Claims (9)

1. a water sampler, is characterized in that comprising:

To be arranged in water body and to gather the water collector (1) of water sample;

The water sample of water collector collection is promoted to the aqueduct (2) of more than the water surface, wherein said aqueduct (2) comprises the horizontal segment (21) that is connected with water collector and becomes to be greater than the bending segment (22) of the angle [alpha] of 90 ° with horizontal segment;

The water tank (7) of the water sample of store collected.

2. water sampler as claimed in claim 1, characterized by further comprising:

Flexible mozzle (6), is connected between described aqueduct and water tank, so that water sample in aqueduct is guided to described water tank (7).

3. water sampler as claimed in claim 1 or 2, is characterized in that:

Described water collector (1) is in the frusto-conical with large end and small end, and its large end flows into for water sample, and its small end is connected with described aqueduct.

4. water sampler as claimed in claim 1 or 2, it is characterized in that: described water tank (7) tank body offers water inlet (71) near the position of bottom, flowing into described water tank (7) for making the collection water sample promoted through aqueduct (2).

5. water sampler as claimed in claim 4, is characterized in that: be provided with one way stop peturn valve (72) at described water inlet (71), prevents the water sample backflow entered in described water tank (7).

6. water sampler as claimed in claim 4, is characterized in that: establish run-down pipe (73) on described water tank (7) top.

7. water sampler as claimed in claim 4, is characterized in that establishing the socket (76) that can insert probe (8) at described water tank (7) top.

8. water sampler as claimed in claim 2, characterized by further comprising horizontal duct (4), described horizontal duct is connected between described aqueduct and described mozzle.

9. a water quality detection system, comprise as arbitrary in claim 1-8 as described in water sampler and collector as described in being positioned over water tank (7) in water quality detection probe (8).