WO2020034236A1

WO2020034236A1 - Water hardness detection system

Info

Publication number: WO2020034236A1
Application number: PCT/CN2018/101318
Authority: WO
Inventors: 马旭光; 倪雷
Original assignee: 南京福碧源环境技术有限公司
Priority date: 2018-08-16
Filing date: 2018-08-20
Publication date: 2020-02-20
Also published as: CN109283302A; CN109283302B

Abstract

Disclosed is a water hardness detection system. The system comprises a water inlet pipeline (11), a test box (7), a water outlet pipeline (17), and an infrared transceiving device (5); the interior of the test box (7) is provided with a piston (13) and resin (15), and the piston (13) is located at the infrared light line of the infrared transceiving device (5). The present invention can detect the change of water hardness within a certain range, provides an electronic control signal to a softening system for performing regeneration control, and is small in size and low in costs.

Description

Water quality hardness detection system

Technical field

The invention relates to a water quality hardness detection system, and belongs to the technical field of water quality detection.

Background technique

There are generally two types of water hardness testing methods on the market:

1. Precision electronic hardness tester. This kind of equipment can detect water quality with high accuracy and can provide electronic signals to related equipment. But the volume is large, and most of them are imported, which is expensive.

Second, reagent titration detection. Such equipment is inexpensive and easy to use. But it can only be operated manually, and cannot provide signals to related equipment automatically.

Chinese patent with application number 201510066069.9 discloses an on-line measuring and controlling device for water hardness of steam boilers, which uses a colorimetric analysis method when detecting water quality, that is, the measuring reagent and the ions in the measured water react in the measuring tube to make the solution A method of generating color, and then irradiating the solution with a specific wavelength of light from a light source, and finally measuring the intensity of the transmitted light through a light receiving element to determine the ion concentration. But its structure is complex and expensive.

Summary of the Invention

Objective of the invention: In order to overcome the shortcomings in the prior art, the present invention provides a water hardness detection system with a simple structure and capable of detecting changes in water hardness.

Technical solution: In order to achieve the above objective, the technical solution adopted by the present invention is:

A water hardness testing system includes a water inlet pipe, a test box, a water outlet pipe, and an infrared transceiver. The test box is provided with a water inlet and a water outlet, and the water inlet of the test box is connected to the water inlet pipe. The water outlet of the test box is connected to the water outlet pipe; a piston and a resin are provided inside the test box, and a through water channel is provided on the piston, and the resin is located on a side of the piston near the water outlet of the test box. One end of the resin is in contact with the piston, and the other end is in contact with the side of the test box where the water outlet is opened; and the piston is located on the infrared light line of the infrared transceiver; when the test box passes soft water, the resin has the largest expansion coefficient The piston moves to the side of the water inlet of the test box to the first limit position, and the infrared light is blocked. At this time, the infrared transmitting and receiving device is not connected, and does not send out an electrical signal. Signal 1 is generated. When the test box passes hard water, the resin expansion coefficient It descends, the piston moves to the second extreme position of the water outlet of the test box, and the infrared light is not blocked. At this time, the infrared transceiver is connected to send telecommunications. Generating two signals, and a signal the signal is determined to two water hardness.

Further: it further comprises a water inlet fixing seat and a water outlet fixing seat, the water inlet of the test box is connected to the water inlet pipe through the water inlet fixing seat, and the water outlet of the test box is connected to the water outlet pipe through the water outlet fixing seat Connected.

Further, a water inlet ball valve is provided on the water inlet pipeline, and a water outlet ball valve is provided on the water outlet pipeline.

Further: a check valve is provided on the water outlet pipeline.

Further, a water inlet filter is disposed on a side surface of the test box provided with a water inlet, and the water inlet filter covers the water inlet of the test box.

Further, a water outlet filter is disposed on a side surface of the test box provided with a water outlet, and the water outlet filter covers the water outlet of the test box.

Further, a piston filter is arranged on the piston, and the piston filter covers the water outlet of the water channel.

Further, the water inlet pipe and the water outlet pipe are connected to the water line to be detected through a tee.

Preferably, the test box is a transparent tube.

Further: an instruction line is engraved on the test box.

Compared with the prior art, the present invention has the following beneficial effects:

The invention can detect the water hardness change within a certain range, and provides electric control signals to the softening equipment for regeneration control, and has a small volume and low cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a water hardness testing system according to the present invention.

FIG. 2 is a schematic structural diagram of a test box according to the present invention.

detailed description

The present invention is further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. The modifications in the form of value all fall within the scope defined by the claims appended to this application.

A water hardness testing system, as shown in FIG. 1, includes a water inlet pipe 11, a test box 7, a water outlet pipe 17, and an infrared transmitting and receiving device 5. The test box 7 is provided with a water inlet and a water outlet. The water inlet of the test box 7 is connected to the water inlet pipe 11, and the water outlet of the test box 7 is connected to the water outlet pipe 17; as shown in FIG. 2, a piston 13 and a resin 15 are provided inside the test box 7. The piston 13 is provided with a penetrating water passage 131. The resin 15 is located on the side of the piston 13 near the water outlet of the test box 7, and one end of the resin 15 is in contact with the piston 13 and the other end is opened with the test box 7. The sides of the water inlet are in contact with each other, and the resin is a sodium-type strongly acidic cation exchange resin; and the piston 13 is located on the infrared light line of the infrared transmitting and receiving device 5; A filter screen 12 that covers the water inlet of the test box 7. A water outlet filter 16 is disposed on a side surface of the test box 7 provided with a water outlet, and the water outlet filter 16 covers the water outlet of the test box 7. A piston filter 14 is provided on the piston 13, and the piston filter 14 covers the water outlet of the water channel 131. The water inlet pipe 11 and the water outlet pipe 17 are connected to the water line to be detected through a tee.

When the quality of the water passing through the test box 7 is soft water, the expansion coefficient of the resin 15 is the largest. After the resin 15 expands, the piston 13 is pushed to the place closest to the water inlet of the test box until the piston 13 moves to the water inlet of the test box 7 to In the first extreme position, the infrared emitted from the infrared transmitting unit to the infrared receiving unit in the infrared transmitting and receiving device 5 is blocked by the piston 13. The infrared receiving unit cannot receive the infrared emitted from the infrared transmitting unit. At this time, the infrared transmitting and receiving device 5 is not connected and does not emit An electrical signal generates a signal one. When the quality of the water passing through the test box 7 is hard water, the Na ions in the resin 15 are exchanged into calcium and magnesium ions, the water absorption rate decreases, the expansion coefficient of the resin 15 decreases, the volume shrinks, and the piston 13 is fed with water toward the water outlet of the test box 7 When pushed, the piston 13 moves to the second extreme position of the water outlet of the test box 7 and the infrared receiving unit receives the infrared rays from the infrared transmitting unit. At this time, the infrared transmitting and receiving device 5 communicates with each other and sends out an electrical signal to generate signal two. The first and the second signal can judge the water hardness.

It also includes a water inlet fixing base 41 and a water outlet fixing base 42. The water inlet of the test box 7 is connected to the water inlet pipe 11 through the water inlet fixing base 41, and the water outlet of the test box 7 is connected to the water outlet fixing base 42. It is connected to the water outlet pipe 17. The water inlet pipe 11 is provided with a water inlet ball valve 3, and the water outlet pipe 17 is provided with a water outlet ball valve 8. The water outlet pipe 17 is provided with a check valve 9.

The invention is used for water quality detection after softening equipment treatment. Water enters from pipeline inlet 1 and is divided into two channels through tee 2 and one channel leads to water equipment. One channel passes water inlet ball valve 3 and enters test box 7 and from test box 7 After the outflow, it passes through the water outlet ball valve 8 and the check valve 9 and then passes through the tee 2 to be incorporated into the water equipment pipeline.

There is a check valve 9 between the water line and the water outlet line 17 of the test box, so the water line will not flow backward. The water inlet ball valve 3 and the water outlet ball valve 8 are provided at both ends of the test box 7, and the water path of the test box 7 can be cut off after being closed for replacing the test box 7.

The two ends of the test box 7 are provided with a water inlet fixing seat 41 and a water outlet fixing seat 42, respectively. The water inlet fixing seat 41 and the water outlet fixing seat 42 and the test box 7 are assembled by using a thread, and the inside is sealed with a gasket.

The test box 7 is a transparent tube, and there are several indicator lines 6 on the tube wall. The infrared transmitting and receiving device 5 can adjust the position as required, and align the required indication line.

When the water treated by the softening equipment passes through the main pipe, part of the water flows through the tee 2 and flows into the water inlet pipe 11 into the test box 7. When entering the test box, it first passes through the water inlet filter 12 and flows through the hole in the middle of the piston 13. Then, it passes through the piston filter 14 at the bottom of the piston and enters the resin 15 in the test box. At this time, if the water passing through is soft water, the water-swelling expansion coefficient (expansion coefficient) of the resin 15 is the largest and is maximized. If the water passing through has hardness (the total content of Ca2 + and Mg2 + in the water is the total hardness of the water), the resin 15 will be replaced with the hardness in the water. After the replacement, the expansion coefficient will decrease, and the water will push the piston 13 to the outlet of the test box.端移动。 Mobile end. The higher the hardness of the passing water, the greater the distance the piston moves. When the piston moves, the original blocked infrared transmitting unit communicates with the infrared receiving unit, and sends out relevant electrical signals to start the softening device to perform related operations.

The water flowing through the test box 7 passes through the water outlet pipe 17 and enters the main pipe through the check valve 9. Water in the main pipe cannot flow back due to the check valve 9. When the test box fails, close the water inlet ball valve 3 and the water outlet ball valve 8, disassemble the water inlet pipe 11 and the water outlet pipe 17, remove the fixing seat from the test box, and then replace the test box with a new one.

In another embodiment of the present invention, the position at which the resin 15 has the largest water expansion coefficient is taken as the base point 1, and the position at which the resin 15 has the smallest water expansion coefficient is used as the base point 2. They are determined according to the base point 1 and the base point 2. The distance between them is recorded as the base point distance, and then the base point distance is divided into equal divisions. Each division corresponds to a water absorption expansion rate, and then corresponds to the corresponding water hardness. The infrared transceiver 5 is installed in the detection system through a stepper motor. The infrared transmitting and receiving device 5 is moved along the test box 7 during the detection. When detecting, the infrared transmitting and receiving device 5 is driven to move along the test box 7 by a stepper motor, and the water inlet of the test box 7 to the piston 13 is determined according to the detection of the infrared transmitting and receiving device 5. The distance is recorded as the detection distance, and the detection distance is compared with the base point distance to determine the position of the piston 13 to determine the scale where the piston 13 is located, and then the hardness of the detected water.

The invention can detect one or more hardness detection points of water quality, and provide the required electrical signals at relevant detection points to trigger softening equipment or other related equipment.

The above is only a preferred embodiment of the present invention, and it should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements and retouches can be made. These improvements and retouches also It should be regarded as the protection scope of the present invention.

Claims

A water hardness detection system is characterized in that it includes a water inlet pipe (11), a test box (7), a water outlet pipe (17), and an infrared transmitting and receiving device (5); an inlet is provided on the test box (7); Water outlet and water outlet, while the water inlet of the test box (7) is connected to the water inlet pipe (11), the water outlet of the test box (7) is connected to the water outlet pipe (17); the test box (7) A piston (13) and a resin (15) are arranged inside, and the piston (13) is provided with a penetrating water channel (131), and the resin (15) is located at the piston (13) near the test box (7). One side of the water outlet; and the piston (13) is located on the infrared light line of the infrared transmitting and receiving device (5); the piston (13) moves to the first limit position of the water inlet of the test box (7), and the infrared light is When it is blocked, the infrared transceiver device (5) generates signal one; the piston (13) moves to the second extreme position to the side of the water outlet of the test box (7), the infrared light is not blocked, and the infrared transceiver device (5) generates signal two. Signals 1 and 2 determine the water hardness.
The water hardness detection system according to claim 1, characterized in that one end of the resin (15) is in contact with the piston (13), and the other end is in contact with the side of the test box (7) where the water outlet is opened.
The water hardness detection system according to claim 1, further comprising a water inlet fixing base (41) and a water outlet fixing base (42), and the water inlet of the test box (7) passes through the water inlet fixing base (41). ) Is connected to the water inlet pipe (11), and the water outlet of the test box (7) is connected to the water outlet pipe (17) through the water outlet fixing seat (42).
The water hardness detection system according to claim 1, characterized in that: a water inlet ball valve (3) is provided on the water inlet pipe (11), and a water outlet ball valve (8) is provided on the water outlet pipe (17).
The water hardness detection system according to claim 1, characterized in that a check valve (9) is provided on the water outlet pipe (17).
The water hardness detection system according to claim 1, wherein a water inlet filter (12) is provided on a side surface of the test box (7) provided with a water inlet, and the water inlet filter (12) Cover the water inlet of the test box (7).
The water hardness detection system according to claim 1, characterized in that: a water outlet filter (16) is provided on a side surface of the test box (7) provided with a water outlet, and the water outlet filter (16) is covered on On the water outlet of the test box (7).
The water hardness detection system according to claim 1, wherein a piston filter (14) is provided on the piston (13), and the piston filter (14) covers a water outlet of the water channel (131).
The water hardness detection system according to claim 1, wherein the test box (7) is a transparent tube.
The water hardness detection system according to claim 1, characterized in that: an indicator line (6) is engraved on the test box (7).