Quantitative fixing agent adding device of water sampler
By designing a fixed agent quantitative addition device for water quality samplers, the combination of liquid adder and sample retention head is used to solve the problem of inaccurate and unstable quantitative addition of fixed agent in the prior art, and the accurate and reliable quantitative addition effect is achieved.
Patent Information
- Application Number
- CN202421716972.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The quantitative addition of fixatives in existing water quality samplers is inaccurate, and the pump tube is aging and blocked, resulting in unstable extraction of fixatives.
A fixed agent quantitative addition device including a reagent bottle and a sample retention bottle is designed, and quantitative addition is achieved using a liquid adder and a sample retention head. The liquid filler realizes quantitative extraction of fixative through the first linear stepper motor and the limit bracket, and the sample retention head realizes full mixing of fixative and water sample with the excess standard through the second linear stepper motor and the peristaltic pump.
The quantitative addition of fixative is achieved, and the metering is accurate, stable and reliable, avoiding the overflow and reflux and drip of fixative in the pipeline, and improving the sealing effect of the addition process.
Smart Images
Figure CN223022142U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to an adding device, in particular to a fixed agent quantitative adding device for a water quality sampler. Background Art
[0002] With the acceleration of the industrial development progress, the requirements for industrial emissions are gradually increasing, and the national requirements for the monitoring data of enterprise emissions and emission indicators are increasing year by year. Therefore, it is a common phenomenon for enterprises to be equipped with high-precision intelligent networking monitoring systems. In the sewage discharge monitoring system, an intelligent water quality sampler is an essential water sample collection device. It can automatically complete various collection methods such as timed quantitative proportional collection, mixed water sample collection, and flow proportional collection, and has a remote control mode. It can provide water samples to the water quality automatic analyzer according to requirements, and automatically retain the exceeded-standard water samples during routine inspections or when the water samples exceed the standard, waiting for the inspection personnel to take away the exceeded-standard water samples for the next test work.
[0003] At present, the water quality sampler has a constant temperature refrigeration device, which can store the exceeded-standard water samples at a constant temperature of 4°C. Usually, the water sample storage period is 24 hours. If the water samples cannot be sampled and detected in time, it will have a great impact on the accuracy of the test results. It is necessary to conduct further inspections or notify the enterprise to suspend production temporarily, which will virtually increase the repetitive work of the inspection personnel and cause economic losses to the enterprise.
[0004] In order to stabilize the sewage composition and extend the timeliness of the water samples, a fixed agent can be quantitatively added to the exceeded-standard water samples, and the amount added each time is very small. At present, the adding method of the fixed agent and the exceeded-standard water samples in the water quality sampler is the same, that is, the peristaltic pump is used to rotate and squeeze the pump tube to extract. Due to the long installation distance between the peristaltic pump and the storage reagent bottle of the fixed agent, the pipeline is long, and there is a lot of residual liquid on the pipe wall, resulting in inaccurate measurement. Moreover, the pump tube aging and blockage phenomena are relatively serious, making the extraction measurement of the fixed agent more unstable. Therefore, it is difficult to achieve the quantitative addition of the fixed agent. Content of the Utility Model
[0005] The technical problem to be solved by the utility model is to provide a fixed agent quantitative adding device for a water quality sampler that can achieve the quantitative addition of the fixed agent, with accurate measurement and stable and reliable performance.
[0006] To solve the above problems, the utility model adopts the following technical solutions:
[0007] A fixed agent quantitative adding device for a water quality sampler includes a reagent bottle and a sample retention bottle. The special feature is that a liquid adding device is provided above the reagent bottle. The liquid adding device is communicated with the upper mouth of the reagent bottle through a first one-way valve. A push rod is arranged outside the measuring cylinder of the liquid adding device. The upper end of the push rod is fixedly connected with the upper cover of the core rod of the liquid adding device. A connecting sleeve is sleeved on the push rod through sliding fit, and a locking screw is arranged radially on the connecting sleeve;
[0008] A lead screw slide table is provided on one side of the liquid adding device. A first linear stepper motor is provided on the lead screw slide table. The output end of the first linear stepper motor 6 is fixedly connected to the connecting sleeve through a limit bracket and the locking screw, so as to realize the quantitative extraction of the fixing agent in the reagent bottle.
[0009] A sampling head is provided above the sampling bottle. Two liquid inlet holes are arranged side by side on the sampling head. The two liquid inlet holes are respectively communicated with the liquid injection hole arranged at the center of the sampling head. One of the liquid inlet holes is communicated with the liquid discharge hole on one side of the measuring cylinder through a pipeline and a second one-way valve, so as to discharge the fixing agent extracted from the reagent bottle into the sampling bottle; the other liquid inlet hole is communicated with the water sample pipeline, so as to collect the excessive water sample.
[0010] As a further preference, a groove type photoelectric switch is provided on one side of the upper end of the ejector rod. When the limit bracket moves upward following the first linear stepper motor, it is inserted into the notch of the photoelectric switch, so as to control the core rod stroke of the liquid adding device.
[0011] As a further preference, the sampling head includes a filling head and a sealing sleeve sleeved on the lower end of the filling head. The outer edge of the lower end of the sealing sleeve is conical, so as to be easily inserted into the sealing cover at the upper end of the sampling bottle.
[0012] As a further preference, the sealing cover includes a mounting sleeve threadedly connected to the upper mouth of the sampling bottle. A sealing sleeve ring, a sealing ring and a liquid guiding nozzle are sequentially arranged at the lower end inside the mounting sleeve. A pressure spring and a sealing core shaft are arranged at the upper end inside the mounting sleeve. A pressing cover sleeved outside the sealing core shaft is fixed at the upper end of the mounting sleeve. The lower end of the sealing core shaft is inserted into the sealing sleeve ring through a sealing clearance fit. An L-shaped liquid inlet channel is arranged on the sealing core shaft, and the outlet of the liquid inlet channel is sealed by the sealing sleeve ring; after the sealing core shaft is pressed down, the liquid inlet channel is communicated with the liquid guiding nozzle.
[0013] As a further preference, the upper port of the liquid inlet channel is conical and is in taper fit with the outer edge taper of the lower end of the sealing sleeve, so as to improve the sealing effect during the quantitative addition of the fixing agent.
[0014] As a further preference, a support plate is provided above the sampling head. A second linear stepper motor is provided on the support plate. The sampling head is connected to the lower end of the second linear stepper motor, so as to drive the sampling head to press down to realize the addition of the excessive water sample and the fixing agent.
[0015] The beneficial effects of the utility model are:
[0016] 1. Since a push rod is provided outside the graduated cylinder of the liquid adding device, a connecting sleeve is sleeved on the push rod through sliding fit, a first linear stepping motor is provided on one side of the liquid adding device through a lead screw slide table, and the output end is fixedly connected to the connecting sleeve through a limit bracket and a locking screw. Therefore, by pushing the push rod upward with the first linear stepping motor, the core rod and the piston in the liquid adding device can be driven to move upward, so as to realize the quantitative extraction of the fixing agent in the reagent bottle; by driving the push rod downward with the first linear stepping motor, the quantitative fixing agent in the liquid adding device can be conveyed into the sample retaining bottle through the second one-way valve and the sample retaining head, and there is no overflow and backflow phenomenon of the fixing agent, which can reduce the retention and dripping of the fixing agent in the pipeline, and can realize the quantitative addition of the fixing agent, with accurate measurement and stable and reliable performance.
[0017] 2. Since two liquid inlet holes are arranged in parallel on the sample retaining head arranged above the sample retaining bottle, one of the liquid inlet holes is communicated with the liquid discharge hole on one side of the graduated cylinder through a pipeline and a second one-way valve, and the other liquid inlet hole is communicated with the water sample pipeline; the peristaltic pump arranged on the water sample pipeline uses the negative pressure generated by squeezing the pump tube to extract the excessive water sample, so that the flow rate and flow of the excessive water sample are greater than the flow rate and flow of the fixing agent. Therefore, the fixing agent can be fully dissolved into the excessive water sample, so as to realize the stirring function.
[0018] 3. The device does not change the external shape structure of the original water quality sampler, has a compact overall structure design, simple operation and high maintainability. Description of the Drawings
[0019] Figure 1 is the structural schematic diagram of the present utility model.
[0020] Figure 2 is the structural schematic diagram of the liquid adding device.
[0021] Figure 3 is Figure 2 the A-A cross-sectional view of
[0022] Figure 4 is the structural cross-sectional view of the sample retaining head.
[0023] Figure 5 is the structural cross-sectional view of the sealing cover.
[0024] Figure 6 is Figure 1 the partial enlarged view of
[0025] Figure 7 is the installation schematic diagram of the present utility model.
[0026] In the figure: reagent bottle 1, positioning seat 2, first one-way valve 3, lead screw slide 4, support plate strip 5, first linear stepper motor 6, L-shaped plate frame 7, limit support 8, photoelectric switch 9, support 10, liquid adding device 11, support plate 12, second linear stepper motor 13, sample retaining head 14, sealing cover 15, pipeline 16, second one-way valve 17, sample retaining bottle 18, ejector rod 19, measuring cylinder 20, connecting sleeve 21, locking screw 22, upper cover 23, liquid inlet nozzle 24, liquid discharge hole 241, piston 25, core rod 26, liquid guiding nozzle 27, O-ring 28, sealing sleeve ring 29, mounting sleeve 30, pressure spring 31, gland 32, sealing core shaft 33, frame 34, rotating disk 35. Detailed implementation mode
[0027] As Figures 1-7 shown, a fixing agent quantitative adding device for a water quality sampler according to the present utility model includes a reagent bottle 1 and a sample retaining bottle 18. The reagent bottle 1 is fixed on a frame 34 inside the water quality sampler through two positioning seats 2. The sample retaining bottles 18 are evenly distributed in a circumferential direction on a rotating disk 35 of the water quality sampler. A liquid adding device 11 is arranged above the reagent bottle 1. The lower port of the liquid adding device 11 is communicated with the upper opening of the reagent bottle 1 through a first one-way valve 3.
[0028] The liquid adding device 11 includes a measuring cylinder 20. Dose scales are arranged on the outer wall of the measuring cylinder 20. A core rod 26 and a piston 25 are inserted into the measuring cylinder 20. The piston 25 is fixed at the lower end of the core rod 26. A liquid inlet nozzle 24 is hermetically connected to the lower end of the measuring cylinder 20, and a liquid discharge hole 241 communicating with its inner cavity is arranged radially on one side of the liquid inlet nozzle. A ejector rod 19 is arranged in parallel on the outside of the measuring cylinder 20. The upper end of the ejector rod 19 is fixedly connected to an upper cover 23 fixed to the upper end of the core rod 26. A connecting sleeve 21 is sleeved on the ejector rod 19 through a sliding fit, and a locking screw 22 is arranged radially on the connecting sleeve 21.
[0029] A manual lead screw slide 4 is arranged on one side of the liquid adding device 11. The lead screw slide 4 is fixed on a frame 34 inside the water quality sampler through two support plate strips 5. A first linear stepper motor 6 is fixedly installed on the slide of the lead screw slide 4 through an L-shaped plate frame 7. The upper end of the output shaft of the first linear stepper motor 6 is fixedly connected to the connecting sleeve 21 through a limit support 8 and the locking screw 22, so as to realize the quantitative extraction of the fixing agent in the reagent bottle 1.
[0030] A groove-shaped photoelectric switch 9 is arranged on one side of the upper end of the ejector rod 19. The photoelectric switch 9 is installed inside the water quality sampler through a Z-shaped support 10. When the limit support 8 moves upward following the first linear stepper motor 6, it is inserted into the notch of the photoelectric switch 9, so as to control the core rod stroke of the liquid adding device 11. The signal output end of the photoelectric switch 9 is connected to the controller of the water quality sampler.
[0031] Above the sample storage bottle 18, there is a sample storage head 14. The sample storage head 14 includes a filling head 141 and a sealing sleeve 142 sleeved on the lower end of the filling head 141. The sealing sleeve is made of polytetrafluoroethylene material and the outer edge of the lower end is conical, so as to be inserted into the sealing cap 15 at the upper end of the sample storage bottle 18. In the middle of the filling head on the sample storage head 14, there are two liquid inlet holes 143 arranged in parallel. The two liquid inlet holes 143 are respectively communicated with the liquid injection hole arranged at the center of the sample storage head 14. One of the liquid inlet holes 143 is communicated with the drain hole 241 on one side of the measuring cylinder 20 through a pipeline 16 and a second one-way valve 17, and is used to discharge the fixing agent extracted from the reagent bottle 1 into the sample storage bottle 18; the other liquid inlet hole 143 is communicated with a water sample pipeline (not shown in the figure) and is used to collect the exceeded-standard water sample.
[0032] The sealing cap 15 includes a mounting sleeve 30 connected to the upper mouth of the sample storage bottle 18 by thread. Inside the lower end of the mounting sleeve 30, there are a sealing sleeve ring 29, an O-ring 28 and a liquid guiding nozzle 27 arranged in sequence. The sealing sleeve ring 29 is inserted into the mounting sleeve 30 by clearance fit. The liquid guiding nozzle 27 is connected to the lower end inside the mounting sleeve 30 by thread. The sealing ring 28 is clamped between the sealing sleeve ring 29 and the liquid guiding nozzle 27; Inside the upper end of the mounting sleeve 30, a pressure spring 31 and a sealing core shaft 33 are inserted in sequence. At the upper end of the mounting sleeve 30, a gland 32 sleeved outside the sealing core shaft 33 is fixed by screws. The lower end of the sealing core shaft 33 is inserted into the sealing sleeve ring 29 by sealing clearance fit. An L-shaped liquid inlet channel 331 is arranged on the sealing core shaft 33, and the outlet of the liquid inlet channel is sealed by the sealing sleeve ring 29; After the sealing core shaft 33 is pressed down, its lower end is inserted into the liquid guiding nozzle 27, so that the liquid inlet channel is communicated with the liquid guiding nozzle 27.
[0033] The upper port of the liquid inlet 331 is conical and is tapered with the outer edge of the lower end of the sealing sleeve 142 to improve the sealing effect when adding the fixing agent quantitatively.
[0034] Above the sample storage head 14, there is a support plate 12, which is fixed inside the water quality sampler and a second linear stepper motor 13 is fixed on the support plate 12. The sample storage head 14 is coaxially connected to the lower end of the output shaft of the second linear stepper motor 13 and is used to drive the sample storage head 14 to press down to realize the addition of the exceeded-standard water sample and the fixing agent.
[0035] During use, loosen the locking screw 22, rotate the manual lead screw slide 4 according to the dose of the fixing agent to be extracted, drive the first linear stepper motor 6 to slide axially up and down, thereby driving the connecting sleeve 21 on the ejector rod 19 to slide up and down, adjust the initial position of the connecting sleeve 21, and lock the locking screw 22 after adjustment.
[0036] During operation, the controller of the water quality sampler controls the start of the first linear stepper motor 6. Through the limit bracket and the connecting sleeve 21, the push rod 19, the core rod and the piston move upward, so as to quantitatively extract the fixing agent in the reagent bottle 1 into the measuring cylinder of the liquid adding device 11. When the limit bracket moves upward into the notch of the photoelectric switch 9, the photoelectric switch 9 is triggered and sends a signal to the controller of the water quality sampler to control the first linear stepper motor 6 to stop working;
[0037] Then, the second linear stepper motor 13 is controlled to start, and the sampling head 14 is pushed downward to insert into the sealing cap at the upper end of the corresponding sampling bottle 18. After the sampling head 14 moves downward, the sealing core shaft 33 is pushed downward to compress the compression spring. When the lower end of the sealing core shaft 33 is inserted into the liquid guide nozzle 27, the liquid inlet channel is communicated with the liquid guide nozzle 27. At this time, the first linear stepper motor 6 and the peristaltic pump arranged on the water sample pipeline are controlled to start at the same time. The first linear stepper motor 6 starts to move downward, driving the piston to move downward, so that the fixing agent in the reagent bottle 1 enters the sampling head 14 through the pipeline and the second one-way valve, and enters the sampling bottle 18 through the sampling head 14, the liquid inlet channel and the liquid guide nozzle 27 together with the excessive water sample extracted by the peristaltic pump. Since the peristaltic pump uses the negative pressure generated by squeezing the pump tube to extract the excessive water sample, the flow rate and flow of the excessive water sample are greater than those of the fixing agent. Therefore, the fixing agent can be fully dissolved in the excessive water sample, thus realizing the stirring function.
[0038] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.
Claims
1. A device for quantitatively adding a fixing agent to a water sampler, comprising a reagent bottle and a sample bottle, characterized in that: A liquid adder is provided above the reagent bottle, and the liquid adder is connected to the upper opening of the reagent bottle through a first one-way valve. A push rod is provided on the outer side of the measuring cylinder of the liquid adder, and the upper end of the push rod is fixedly connected to the upper cover of the upper end of the core rod of the liquid adder. A connecting sleeve is provided on the push rod through a sliding matching sleeve, and a locking screw is provided on the connecting sleeve along the radial direction; A lead screw slide is provided on one side of the liquid adding device, a first linear stepping motor is provided on the lead screw slide, and an output end of the first linear stepping motor is fixedly connected to the connecting sleeve through a limit bracket and the locking screw, so as to realize quantitative extraction of the fixing agent in the reagent bottle; A sample head is provided above the sample bottle, and two liquid inlet holes are arranged in parallel on the sample head. The two liquid inlet holes are respectively connected with the injection hole arranged in the center of the sample head. One of the liquid inlet holes is connected with the discharge hole on one side of the measuring cylinder through a pipeline and a second one-way valve, and is used to discharge the fixative extracted from the reagent bottle into the sample bottle; the other liquid inlet hole is connected with the water sample pipeline, and is used to collect water samples exceeding the standard.
2. The device for quantitatively adding a fixing agent to a water sampler according to claim 1, characterized in that: A slot-type photoelectric switch is arranged on one side of the upper end of the push rod, and the limit bracket is inserted into the slot of the photoelectric switch when following the first linear stepping motor upward, so as to control the core rod stroke of the liquid charger.
3. The device for quantitatively adding a fixing agent to a water sampler according to claim 1 or 2, characterized in that: The sample retaining head comprises a filling head and a sealing sleeve sleeved on the lower end of the filling head. The outer edge of the lower end of the sealing sleeve is conical so as to facilitate insertion into the sealing cover at the upper end of the sample retaining bottle.
4. The device for quantitatively adding a fixing agent to a water sampler according to claim 3, characterized in that: The sealing cover includes an installation sleeve which is connected to the upper mouth of the sample bottle through a threaded connection, a sealing ring, a sealing ring and a liquid guide nozzle are arranged in sequence at the lower end of the installation sleeve, a pressure spring and a sealing core shaft are arranged at the upper end of the installation sleeve, a pressure cover which is sleeved on the outside of the sealing core shaft is fixed at the upper end of the installation sleeve, the lower end of the sealing core shaft and the sealing ring are plugged in through a sealing gap, an L-shaped liquid inlet channel is arranged on the sealing core shaft, and the outlet of the liquid inlet channel is sealed by the sealing ring; after the sealing core shaft is pressed down, the liquid inlet channel is connected to the liquid guide nozzle.
5. The device for quantitatively adding a fixing agent to a water sampler according to claim 4, characterized in that: The upper port of the liquid inlet channel is conical and matches the taper of the outer edge of the lower end of the sealing sleeve to improve the sealing effect when the fixing agent is quantitatively added.
6. The device for quantitatively adding a fixing agent to a water sampler according to claim 1 or 3, characterized in that: A support plate is provided above the sample retention head, and a second linear stepping motor is provided on the support plate. The sample retention head is connected to the lower end of the second linear stepping motor to drive the sample retention head downward to achieve the addition of excessive water samples and fixatives.