Sampling and discharging device for online automatic water quality monitor

Abstract

The utility model provides a sampling and discharging device for a water quality on-line automatic monitor, and belongs to the technical field of water quality monitoring. Comprising a metering unit, a digestion unit, a peristaltic pump, two two-way high-pressure electromagnetic valves and three-way electromagnetic valves, the number of the two-way high-pressure electromagnetic valves is two, and the three-way electromagnetic valves comprise the first three-way electromagnetic valve and the second three-way electromagnetic valve. The metering unit, the digestion unit, the peristaltic pump, the two-way high-pressure electromagnetic valve and the three-way electromagnetic valve are connected through a water sample pipe and a pipe joint, and the lower part of the peristaltic pump is connected with the first three-way electromagnetic valve. The position of the light source is adjusted through the sliding groove so as to adapt to different use scenes; and the liquid can be directly discharged without passing through the metering unit again, so that the time is saved, and the liquid pollution is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality monitoring technical field especially relates to a sampling and discharging device for water quality on -line automatic monitor. BACKGROUND

[0002] Metering, sampling, sample feeding and sample discharging are basic functions of water quality on-line monitoring equipment, and most of the sampling, sample feeding and sample discharging devices of current water quality on-line monitoring equipment only have basic functions. Usually, one flow path needs to undertake multiple tasks such as sampling, sample feeding and sample discharging, and cross contamination of the flow path may occur.

[0003] In the sampling, the existing technology is not strict in controlling the precision, which may cause the volume of liquid to be different each time, and such difference reduces the stability and accuracy of the measurement data of the equipment.

[0004] In the sample discharging, the existing technology generally discharges the liquid in the digestion unit back to the metering unit, and then discharges the liquid from the ten-way valve through the metering unit. The liquid may be left in the inner wall of the metering pipe when returning to the metering unit, thereby contaminating the subsequent liquid. In addition, the complicated working process also prolongs the single operation time of the equipment. Therefore, the sampling and discharging device for water quality on-line automatic monitor is provided to meet the needs. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a sampling and discharging device for water quality on-line automatic monitor to solve the existing problems.

[0006] To solve the above technical problems, the utility model provides the following technical scheme:

[0007] A sampling and discharging device for water quality on-line automatic monitor, comprising: a metering unit, a digestion unit, a peristaltic pump, two two-way high-pressure electromagnetic valves and three-way electromagnetic valves, the two two-way high-pressure electromagnetic valves are provided with two, the three-way electromagnetic valves comprise a first three-way electromagnetic valve and a second three-way electromagnetic valve, the metering unit, the digestion unit, the peristaltic pump, the two two-way high-pressure electromagnetic valves and the three-way electromagnetic valves are connected through a water sample pipe and a pipe joint, the peristaltic pump is connected to the first three-way electromagnetic valve at the lower end, the other end of the peristaltic pump is empty, the other two ends of the first three-way electromagnetic valve are connected with the metering unit and the second three-way electromagnetic valve respectively, the bottom of the metering unit is provided with a ten-way valve, the ten-way valve is connected with the metering unit through a connecting bolt, one of the channels of the ten-way valve is connected with the two two-way high-pressure electromagnetic valves, the other end of the two two-way high-pressure electromagnetic valves is connected with the digestion unit, the other two-way high-pressure electromagnetic valve is connected to the digestion unit, and the other channel of the other two-way high-pressure electromagnetic valve is empty.

[0008] In some examples, the metering unit comprises a metering unit frame, the top end of the metering unit frame is internally provided with a metering unit upper seal, the internal top end of the metering unit upper seal is provided with a first gasket, the external thread of the metering unit upper seal is provided with a metering unit nut, the internal bottom end of the metering unit upper seal is provided with a first O-shaped ring, the metering unit frame is internally provided with a metering pipe, the top of the metering pipe is located inside the metering unit upper seal, and the bottom of the metering pipe is connected with the ten-way valve through the metering unit frame.

[0009] As a further scheme of the utility model: the outside of metering unit frame is provided with a sliding groove, a plurality of light source fixing frames are slidably connected in the sliding groove, a light source lamp holder is arranged in each light source fixing frame, and the light source lamp holder and the light source fixing frame are connected through a first cup head bolt.

[0010] As a further scheme of the utility model: the surface of the metering unit frame outside the sliding groove is provided with a scale, the metering unit frame outside is provided with a metering unit cover plate, and the metering unit cover plate and the metering unit frame are connected through another first cup head bolt.

[0011] As a further scheme of the utility model: the inside top end of the digestion unit frame is provided with an upper seal fixing frame, the inside of the upper seal fixing frame is provided with a digestion unit upper seal, the digestion unit upper seal passes through the digestion unit frame, the digestion unit upper seal and the upper seal frame are connected through a second cup head bolt, the surface of the digestion unit upper seal is sleeved with a digestion unit spring, the external thread of the digestion unit upper seal is connected with a digestion unit nut, the external surface of the digestion unit upper seal is sleeved with a second gasket, the second gasket is in contact with the digestion unit nut, and the bottom of the upper seal fixing frame is provided with a second O-shaped ring.

[0012] As a further scheme of the utility model: the bottom of the digestion unit frame is provided with a digestion unit lower seal, the inside of the digestion unit lower seal is provided with a third O-shaped ring, and the digestion unit upper seal and the digestion unit lower seal are provided with a cuvette.

[0013] As a further scheme of the utility model: the outside of the digestion unit frame is provided with a fiber collimating member sliding block, the fiber collimating member sliding block is slidably connected with the digestion unit frame, and the fiber collimating member sliding block is internally provided with a fiber collimating member main body.

[0014] As a further scheme of the utility model: the lower sealing element of the digestion unit is connected with two high-pressure electromagnetic valves, the upper sealing element of the digestion unit is connected with another two high-pressure electromagnetic valve, and a digestion unit cover plate is arranged outside the digestion unit frame.

[0015] The utility model discloses the beneficial effect: when sampling, liquid first enters the metering unit through ten -way valve, and the metering unit has scale and chute on, and the required liquid volume is accurately measured through the light of both sides light source light opposition method, and the interference ability of the impurity in water is certain simultaneously, after sampling, liquid will be sampled through the rotation of peristaltic pump and the on-off of each component, and liquid is pushed into the digestion unit, when discharging, the liquid in the digestion unit is not pushed into the metering unit again, but is discharged from ten -way valve through two high-pressure electromagnetic valves from the digestion unit, the utility model discloses the measurement precision is high, and the position of light source can be adjusted through the chute to cope with different use scenes, when discharging, can be discharged directly, and need not pass through the metering unit again, save time and avoid liquid pollution. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further explained in connection with the drawings.

[0017] Figure 1 It is the whole structure schematic diagram of sampling and discharging device for water quality on -line automatic monitoring appearance;

[0018] Figure 2 It is the structure exploded view of metering unit in sampling and discharging device for water quality on -line automatic monitoring appearance;

[0019] Figure 3 It is the structure schematic diagram of metering unit frame in the metering unit of the utility model;

[0020] Figure 4 It is the structure exploded view of digestion unit in sampling and discharging device for water quality on -line automatic monitoring appearance;

[0021] Figure 5 It is the structure schematic diagram of digestion unit in sampling and discharging device for water quality on -line automatic monitoring appearance;

[0022] Figure 6 It is the structure schematic diagram of two high-pressure electromagnetic valves in sampling and discharging device for water quality on -line automatic monitoring appearance;

[0023] Figure 7 It is the structure schematic diagram of three -way electromagnetic valve in sampling and discharging device for water quality on -line automatic monitoring appearance;

[0024] Figure 8 It is sampling flow path schematic diagram of the utility model;

[0025] Figure 9The utility model discloses a sample inlet flow path schematic view.

[0026] Figure 10 The utility model discloses a sample layout flow path schematic view.

[0027] In the drawing: 1, metering unit, 101, metering unit frame, 102, metering unit nut, 103, metering unit upper sealing element, 104, first gasket, 105, first O-shaped ring, 106, metering pipe, 107, light source lamp holder, 108, light source fixing frame, 109, metering unit cover plate, 110, first cup head bolt, 111, sliding groove, 112, scale, 2, digestion unit, 201, digestion unit frame, 202, digestion unit upper sealing element, 203, digestion unit lower sealing element, 204, second O-shaped ring, 205, digestion unit spring, 206, digestion unit nut, 207, upper sealing element fixing frame, 208, third O-shaped ring, 209, cuvette, 210, optical fiber collimating element main body, 211, optical fiber collimating element sliding block, 212, second gasket, 213, digestion unit cover plate, 214, second cup head bolt, 3, two-way high-pressure electromagnetic valve, 4, first three-way electromagnetic valve, 5, second three-way electromagnetic valve, 6, peristaltic pump, 7, ten-way valve, 8, connecting bolt. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0029] As Figure 1 - Figure 7The utility model discloses an embodiment provides a kind of sampling and sample arrangement for water quality on-line automatic monitor, including metering unit 1, digestion unit 2, peristaltic pump 6, two-way high pressure solenoid valve 3 and three-way solenoid valve, the two-way high pressure solenoid valve 3 is provided with two, three-way solenoid valve includes first three-way solenoid valve 4 and second three-way solenoid valve 5, metering unit 1, digestion unit 2, peristaltic pump 6, two-way high pressure solenoid valve 3 and three-way solenoid valve are connected by water sample pipe and pipe joint between, the peristaltic pump 6 is connected first three-way solenoid valve 4 under, the other end of the peristaltic pump 6 empties, the other two ends of the first three-way solenoid valve 4 are connected with metering unit 1 and second three-way solenoid valve 5 respectively, the bottom of metering unit 1 is provided with ten-way valve 7, and the ten-way valve 7 is connected between metering unit 1 by connecting bolt 8, one of the passageways of the ten-way valve 7 is connected with two-way high pressure solenoid valve 3, the other end of the two-way high pressure solenoid valve 3 is connected with digestion unit 2, another two-way high pressure solenoid valve 3 is connected on digestion unit 2, and the other passageway of another two-way high pressure solenoid valve 3 empties, and peristaltic pump 6 is the power component of entire quick sampling and sample arrangement, and its effect is to transport liquid by peristaltic motion principle, and fluid is pumped by alternately extruding and releasing to the elastic delivery hose of pump, like squeezing hose with two fingers, with the movement of finger, negative pressure is formed in pipe, and liquid flows along with it, peristaltic pump 6 can be forward and reverse, and liquid is sucked when forward, and liquid is discharged when reverse, and ten-way valve 7 is the total brake of entire quick sampling and sample arrangement, and is composed of valve body, valve core, valve seat and ten passageways, and valve core can rotate in valve body to change the opening or closed state of passageway, and ten passageways can be respectively inserted in ten bottles filled with different liquid by water sample pipe, and in the whole device, different liquid is extracted by the opening and closure of each passageway.

[0030] The embodiment needs to be further explained, the metering unit 1 includes metering unit frame 101, the top of the metering unit frame 101 is internally provided with metering unit upper seal 103, the inside top of the metering unit upper seal 103 is provided with first gasket 104, the outside of the metering unit upper seal 103 is provided with metering unit nut 102, the inside bottom of the metering unit upper seal 103 is provided with first O-shaped ring 105, the inside of the metering unit frame 101 is provided with metering pipe 106, the top of the metering pipe 106 is located in the inside of the metering unit upper seal 103, the bottom of the metering pipe 106 is connected with ten-way valve 7 through the metering unit frame 101, the outside of the metering unit frame 101 is provided with sliding groove 111, the inside of the sliding groove 111 is slidably connected with a plurality of light source fixing frames 108, the inside of each light source fixing frame 108 is provided with light source lamp holder 107, the light source lamp holder 107 and the light source fixing frame 108 are connected through first cup head bolt 110, the surface of the metering unit frame 101 outside the sliding groove 111 is provided with scale 112, the outside of the metering unit frame 101 is provided with metering unit cover plate 109, the metering unit cover plate 109 and the metering unit frame 101 are connected through another first cup head bolt 110, the metering unit functions to measure the volume of liquid, the frame side is provided with scale 112, the middle is metering pipe 106, the position of liquid in the metering pipe 106 is determined through the light opposition method of LED lamp beads on the left and right sides, so as to calculate the volume of liquid, and the measurement of liquid is completed.

[0031] It needs to be further explained that the digestion unit 2 includes an upper sealing piece fixing frame 207 arranged at the inner top of the digestion unit frame 201, the upper sealing piece fixing frame 207 is internally provided with a digestion unit upper sealing piece 202, the digestion unit upper sealing piece 202 penetrates through the digestion unit frame 201, the digestion unit upper sealing piece 202 is connected with the upper sealing piece frame through the second cup head bolt 214, the surface of the digestion unit upper sealing piece 202 is sleeved with a digestion unit spring 205, the outer part of the digestion unit upper sealing piece 202 is threadedly connected with a digestion unit nut 206, the outer surface of the digestion unit upper sealing piece 202 is sleeved with a second gasket 212, the second gasket 212 is in contact with the digestion unit nut 206, the bottom of the upper sealing piece fixing frame 207 is provided with a second O-shaped ring 204, the bottom of the digestion unit frame 201 is provided with a digestion unit lower sealing piece 203, the inside of the digestion unit lower sealing piece 203 is provided with a third O-shaped ring 208, a cuvette 209 is arranged between the digestion unit upper sealing piece 202 and the digestion unit lower sealing piece 203, the outer side of the digestion unit frame 201 is provided with a fiber collimation piece sliding block 211, the fiber collimation piece sliding block 211 is in sliding connection with the digestion unit frame 201, the inside of the fiber collimation piece sliding block 211 is provided with a fiber collimation piece main body 210, the fiber collimation piece main body 210 penetrates through the fiber collimation piece sliding block 211 and extends to the inside of the digestion unit frame 201, the digestion unit lower sealing piece 203 is connected with one of the two-way high-pressure electromagnetic valves 3, the digestion unit upper sealing piece 202 is connected with the other two-way high-pressure electromagnetic valve 3, the outer side of the digestion unit frame 201 is provided with a digestion unit cover plate 213, the digestion unit is used for heating and digesting liquid at high temperature, and plays a role of storing liquid and channel in the rapid sampling and layout process.

[0032] As Figure 8 Figure 10 shown,

[0033] The first three-way electromagnetic valve 4 has three ports, normally open NO, normally closed NC, and common end COM, and can switch between opening and closing states by turning on and off the current, and has three working states of one-in-two-out, two-in-one-out, and one-in-one-out, only one-in-one-out is needed in the rapid sampling and layout process, and the role is to switch different flow paths by opening and closing different valve ports;

[0034] A port is connected with the metering unit, B port is connected with the second three-way electromagnetic valve 5, and C port is connected with the peristaltic pump 6;

[0035] ​The second three-way solenoid valve 5 has three ports: normally open (NO), normally closed (NC), and common (COM). It switches between open and closed states by switching the current on and off, and has three working states: one inlet and two outlets, two inlets and one outlet, and one inlet and one outlet. In the rapid sampling and sorting process, only one inlet and one outlet are needed. Its function is to switch different flow paths by opening and closing different valve ports.

[0036] Port A is connected to the vent to draw in or expel air; Port B is connected to the first three-way solenoid valve 4; Port C is connected to the two-way high-pressure solenoid valve 3.

[0037] The first two-way high-pressure solenoid valve 3 is composed of components such as an electromagnetic coil, valve body, valve core, and spring. When the electromagnetic coil is energized, it generates an electromagnetic force that attracts the valve core to move. When the electromagnetic coil is not energized, the valve core of the two-way high-pressure solenoid valve 3 remains closed under the action of the spring, and fluid cannot pass through. When the electromagnetic coil is energized, the electromagnetic force overcomes the spring force, causing the valve core to move and open the channel, allowing fluid to pass through. It serves as a channel in the rapid sampling and sorting device.

[0038] The first two-way high-pressure solenoid valve 3 is connected to the three-way solenoid valve C port on the top and to the digestion unit on the bottom;

[0039] The second two-way high-pressure solenoid valve 3 consists of a solenoid coil, valve body, valve core, spring, and other components. When the solenoid coil is energized, it generates an electromagnetic force that attracts the valve core to move. When the solenoid coil is not energized, the valve core remains closed under the action of the spring, preventing fluid from passing through. When the solenoid coil is energized, the electromagnetic force overcomes the spring force, causing the valve core to move, opening the passage, and allowing fluid to pass through. It functions as a passage in the rapid sampling and sorting device.

[0040] The second two-way high-pressure solenoid valve 3 is connected to the digestion unit at the top and to one of the channels of the ten-way valve 7 at the bottom.

[0041] The working principle of this utility model:

[0042] Sampling process:

[0043] like Figure 8 As shown, during sampling, the device is powered on, the A and C channels of the first three-way solenoid valve 4 are opened, and the B channel is closed; all channels of the second three-way solenoid valve 5 are closed; the first and second two-way high-pressure solenoid valves 3 are closed, forming the peristaltic pump 6, the passage from port C to port A of the first three-way solenoid valve 4, the metering unit, and the ten-way valve 7, through which liquid enters the metering unit from the ten-way valve 7.

[0044] Sample introduction procedure:

[0045] like Figure 9As shown, during sample injection, the device is powered on, and the A and C channels of the first and second three-way solenoid valves 5 are opened, while the B channel is closed; the first and second two-way high-pressure solenoid valves 3 are opened; forming a passage from the peristaltic pump 6, the first three-way solenoid valve 4 (port C to port A), the metering unit, the first two-way high-pressure solenoid valve 3, the digestion unit, and the second three-way solenoid valve (port C to port A), the liquid is pushed from the metering unit into the digestion unit;

[0046] Sampling process:

[0047] like Figure 10 As shown, during sample discharge, the device is powered on, the B and C channels of the first three-way solenoid valve 4 are opened, and the A channel is closed; the B and C channels of the second three-way solenoid valve 5 are opened, and the A channel is closed; the first and second two-way high-pressure solenoid valves 3 are opened, forming a peristaltic pump 6, the passage from port C to port B of the first three-way solenoid valve 4, the passage from port B to port C of the second three-way solenoid valve 5, the passage of the second two-way high-pressure solenoid valve 3, the digestion unit, the passage of the first two-way high-pressure solenoid valve 3, and the passage of the ten-way valve 7, the liquid enters the ten-way valve 7 from the digestion unit and is discharged.

[0048] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A sampling and discharging device for an online automatic water quality monitoring instrument, characterized in that, The system comprises a metering unit (1), a digestion unit (2), a peristaltic pump (6), a two-way high-pressure solenoid valve (3), and a three-way solenoid valve. Two two-way high-pressure solenoid valves (3) are provided. The three-way solenoid valve includes a first three-way solenoid valve (4) and a second three-way solenoid valve (5). The metering unit (1), digestion unit (2), peristaltic pump (6), two-way high-pressure solenoid valve (3), and three-way solenoid valve are connected via a water sample tube and pipe fittings. The peristaltic pump (6) is connected to the first three-way solenoid valve (4). The other end of the peristaltic pump (6) is emptied. The first three-way solenoid valve (4)... 4) The other two ends are connected to the metering unit (1) and the second three-way solenoid valve (5) respectively. The metering unit (1) is provided with a ten-way valve (7) at the bottom. The ten-way valve (7) is connected to the metering unit (1) by a connecting bolt (8). One of the channels of the ten-way valve (7) is connected to the two-way high-pressure solenoid valve (3). The other end of the two-way high-pressure solenoid valve (3) is connected to the digestion unit (2). The digestion unit (2) is connected to another two-way high-pressure solenoid valve (3). The other channel of the other two-way high-pressure solenoid valve (3) is emptied.

2. The sampling and discharging device for an online automatic water quality monitoring instrument according to claim 1, characterized in that, The metering unit (1) includes a metering unit frame (101), with a metering unit upper seal (103) inside the top of the metering unit frame (101), a first gasket (104) inside the top of the metering unit upper seal (103), a metering unit nut (102) on the external thread of the metering unit upper seal (103), a first O-ring (105) inside the bottom of the metering unit upper seal (103), a metering tube (106) inside the metering unit frame (101), the top of the metering tube (106) located inside the metering unit upper seal (103), and the bottom of the metering tube (106) passing through the metering unit frame (101) and connected to the ten-way valve (7).

3. The sampling and discharging device for an online automatic water quality monitoring instrument according to claim 2, characterized in that, The outer side of the metering unit frame (101) is provided with a slide groove (111), and a plurality of light source fixing brackets (108) are slidably connected inside the slide groove (111). Each light source fixing bracket (108) is provided with a light source lamp holder (107), and the light source lamp holder (107) and the light source fixing bracket (108) are connected by a first cup head bolt (110).

4. The sampling and discharging device for an online automatic water quality monitoring instrument according to claim 3, characterized in that, The surface of the metering unit frame (101) outside the slide (111) is provided with a scale (112), and a metering unit cover plate (109) is provided on the outside of the metering unit frame (101). The metering unit cover plate (109) and the metering unit frame (101) are connected by another first cup head bolt (110).

5. The sampling and discharging device for an online automatic water quality monitoring instrument according to claim 1, characterized in that, The digestion unit (2) includes an upper sealing element fixing bracket (207) provided at the top of the digestion unit frame (201). An upper sealing element (202) of the digestion unit is provided inside the upper sealing element fixing bracket (207). The upper sealing element (202) of the digestion unit passes through the digestion unit frame (201). The upper sealing element (202) of the digestion unit is connected to the upper sealing element frame by a second cup head bolt (214). A digestion unit spring (205) is sleeved on the surface of the upper sealing element (202). A digestion unit nut (206) is threaded on the outside of the upper sealing element (202). A second gasket (212) is sleeved on the outer surface of the upper sealing element (202). The second gasket (212) contacts the digestion unit nut (206). A second O-ring (204) is provided at the bottom of the upper sealing element fixing bracket (207).

6. The sampling and discharging device for an online automatic water quality monitoring instrument according to claim 5, characterized in that, The bottom of the digestion unit frame (201) is provided with a digestion unit lower seal (203), and a third O-ring (208) is provided inside the digestion unit lower seal (203). A cuvette (209) is provided between the digestion unit upper seal (202) and the digestion unit lower seal (203).

7. The sampling and discharging device for an online automatic water quality monitoring instrument according to claim 5, characterized in that, An optical fiber collimator slider (211) is provided on the outside of the digestion unit frame (201). The optical fiber collimator slider (211) is slidably connected to the digestion unit frame (201). An optical fiber collimator body (210) is provided inside the optical fiber collimator slider (211). The optical fiber collimator body (210) passes through the optical fiber collimator slider (211) and extends into the digestion unit frame (201).

8. The sampling and discharging device for an online automatic water quality monitoring instrument according to claim 6, characterized in that, The lower seal (203) of the digestion unit is connected to the two-way high-pressure solenoid valve (3), the upper seal (202) of the digestion unit is connected to another two-way high-pressure solenoid valve (3), and a digestion unit cover plate (213) is provided on the outside of the digestion unit frame (201).

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