Pipeline liquid sampler

Abstract

The utility model provides a pipeline liquid sampler, which belongs to the technical field of sampling equipment and comprises a barrel, a fixing plate is slidably connected in the barrel, a sampling probe is fixedly connected onto the fixing plate, a screw is in threaded connection onto the fixing plate, and one end of the screw is fixedly connected with a stepping motor. According to the utility model, the movement of the sampling probe can be mechanically controlled through the stepping motor, the moving distance of the probe can be displayed on the liquid crystal display screen, the measurement precision is high, and the accurate sampling position can be obtained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sampling equipment technical field especially, it relates to a pipeline liquid sampler. BACKGROUND

[0002] A large number of pipeline transportation are involved in experimental research and industrial production process, and often need to sample and inspect the liquid at different pipe diameters. For example, in a chemical plant, samples need to be taken from the production line regularly to detect the purity of chemicals, reaction progress or pollutant content; in a sewage treatment plant, water quality before and after treatment needs to be monitored to ensure that the water quality meets the discharge standards or reuse requirements. However, the pipelines used in industry and production life are rarely provided with sampling ports to ensure the closedness and continuity of pipeline transportation, and since the sampling position of pipeline liquid is uncertain, the sampling depth also needs to be accurately controlled, so the preset sampling port cannot meet the sampling requirements in most cases.

[0003] At present, the commonly used sampling equipment mostly adopts the mode of manually rotating a knob to adjust the forward and backward movement of a sampling probe, and the position of the sampling probe needs to be obtained by manual reading, which has the problems of large error and difficult accurate adjustment. UTILITY MODEL CONTENT

[0004] In view of the defects or deficiencies in the prior art, the utility model provides a pipeline liquid sampler, which can move the sampling probe by mechanical control of a stepping motor, can display the probe movement distance on a liquid crystal display screen, has high measurement accuracy and can obtain an accurate sampling position.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] The embodiment of the utility model provides a pipeline liquid sampler, which comprises a cylinder, a fixed plate is slidably connected in the cylinder, a sampling probe is fixedly connected on the fixed plate, a screw rod is threadedly connected on the fixed plate, and one end of the screw rod is fixedly connected with a stepping motor.

[0007] Further, a first threaded hole and a second threaded hole are formed in the fixed plate, the sampling probe is fixedly connected with the first threaded hole, and the screw rod is rotatably connected with the second threaded hole.

[0008] Further, a drain pipe is further connected in the cylinder, one end of the drain pipe is fixedly connected with the end of the first threaded hole away from the sampling probe, and the drain pipe is communicated with the sampling probe.

[0009] Further, a first through hole is formed in the bottom surface of the cylinder, the end of the drain pipe away from the fixed plate penetrates through the first through hole and extends to the outside of the cylinder.

[0010] Further, the left side of the fixed plate is provided with a protrusion, the inner wall of the cylinder is provided with a sliding groove at the position corresponding to the protrusion, the sliding groove extends along the height direction of the cylinder, and the protrusion is matched with the sliding groove.

[0011] Further, the sliding groove is further placed with a movable grid copper strip, the movable grid copper strip is fixed at the end of the fixed plate, and the width of the sliding groove is greater than the width of the movable grid copper strip.

[0012] Further, the left side of the fixed plate is provided with a protrusion, the inner wall of the cylinder is provided with a sliding groove at the position corresponding to the protrusion, the sliding groove extends along the height direction of the cylinder, and the protrusion is matched with the sliding groove.

[0013] Further, the outer wall of the cylinder is further provided with a stepping motor controller, and the stepping motor controller is electrically connected with the stepping motor.

[0014] Further, the stepping motor controller is provided with a display screen, a parameter adjustment button, an advance control button and a retreat control button, wherein the display screen is used for displaying various parameters of the stepping motor during operation, the parameter adjustment button is used for adjusting and determining the operation parameters of the stepping motor, and the advance control button and the retreat control button control the forward and reverse rotation of the stepping motor.

[0015] Further, the bottom surface of the cylinder is further provided with a second through hole, the power lines of the displacement digital display device and the stepping motor controller pass through the second through hole and are connected with a transformer, and the transformer is connected with a power plug through wires.

[0016] Compared with the prior art, the beneficial effects of the utility model lie in:

[0017] The utility model discloses a screw rod and fixed plate are set up, and the sampling probe is moved by using the stepping motor, the sampling position of sampling probe can be flexibly adjusted, and the displacement digital display device is further arranged, the sampling position is accurately read by using the displacement digital display device, and the sampling precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is whole structure schematic diagram of sampler in the embodiment of the utility model;

[0019] Figure 2 It is connection relation schematic diagram of sampling probe and drain pipe in the embodiment of the utility model;

[0020] Figure 3 It is connection relation schematic diagram of stepping motor and screw rod in the embodiment of the utility model;

[0021] Figure 4 It is fixed plate plan view in the embodiment of the utility model;

[0022] Wherein, 1, sampling probe; 2, dynamic grid copper strip;3, displacement digital display device;4, digital display switch button;5, liquid crystal display;6, displacement zero button;7, unit conversion button;8, first threaded hole;9, second threaded hole;10, parameter adjustment button;11, forward control button;12, drain pipe;13, screw;14, fixed plate;15, barrel;16, stepper motor controller;17, display screen;18, backward control button;19, power cord;20, transformer;21, power plug;22, stepper motor;23, coupling;24, sliding groove;25, protrusion. DETAILED DESCRIPTION

[0023] The utility model is further explained in connection with the drawings and examples.

[0024] A typical embodiment of the utility model, as shown in Figure 1 A pipeline liquid sampler, comprising a barrel 15, the barrel 15 top is open, bottom is closed arrangement, the fixed plate 14 is slidably connected in the barrel 15, the fixed plate 14 cross section size and the cross section size of barrel 15 inside are identical, the fixed plate 14 left side is provided with protrusion 25, the inner wall of barrel 15 is provided with sliding groove 24 at the corresponding position of protrusion 25, the sliding groove 24 extends along the height direction of barrel 15, the protrusion 25 is adapted with sliding groove 24, so that the fixed plate 14 can be lifted and lowered along the sliding groove 24.

[0025] The first threaded hole 8 is screw connected with sampling probe 1 on the fixed plate 14, and the second threaded hole 9 is screw connected with screw 13 in the second threaded hole 9, the barrel 15 is provided with stepper motor 22, the motor placing groove is set on the bottom surface of the barrel 15, the motor placing groove is adapted with the bottom surface of stepper motor 22, the bottom end of stepper motor 22 can be placed in the motor placing groove, and stepper motor 22 is fixed in the barrel 15 by bolt.

[0026] The output shaft of stepper motor 22 is fixedly connected with screw 13 through coupling 23, so as to drive screw 13 to rotate, the rotation of screw 13 can drive fixed plate 14 to lift and lower, and then drive sampling probe 1 to move, so that sampling probe 1 can be inserted into the sampling hole on the pipeline to sample.

[0027] The cylinder 15 is also connected with a drain pipe 12, one end of the drain pipe 12 is fixedly connected with the first threaded hole 8 away from the sampling probe 1, the sampling probe 1 is a hollow iron needle, which stops moving after entering the pipeline sampling position, the liquid flowing in the pipeline will flow into the probe hole for sampling, the other end of the drain pipe 12 passes through the first through hole in the bottom surface of the cylinder 15 and extends to the outside of the cylinder 15, the drain pipe 12 is in communication with the sampling probe 1, the sampling probe 1 samples the liquid in the pipeline, and the liquid sample is transported to the prepared beaker through the drain pipe 12.

[0028] The chute 24 also has a dynamic grid copper strip 2 placed therein, the end of the dynamic grid copper strip 2 is fixed on the fixed plate 14, the width of the chute 24 is greater than the width of the dynamic grid copper strip 2, when the fixed plate 14 moves, the dynamic grid copper strip 2 slides in the chute 24 following the fixed plate 14, the left outer wall of the cylinder 15 is provided with a displacement digital display device 3, the displacement digital display device 3 is matched with the dynamic grid copper strip 2, the displacement digital display device 3 is provided with a digital display switch button 4, a liquid crystal display screen 5, a displacement zero reset button 6 and a unit conversion button 7, the digital display switch button 4 is used to control the power-on of the displacement digital display device 3, the liquid crystal display screen 5 is used to display the displacement data, the displacement zero reset button 6 is used to reset the displacement data displayed on the liquid crystal display screen 5, and the unit conversion button 7 is used to switch the displacement data unit.

[0029] The displacement digital display device 3 is a common instrument on the market that can measure displacement data, the displacement digital display device 3 is provided with a fixed grid, when the dynamic grid copper strip 2 moves with the fixed plate 14, the fixed grid of the displacement digital display device 3 and the dynamic grid copper strip 2 have a relative position, at this time, the capacitance value between the two changes, the measurement circuit in the displacement digital display device 3 can detect the change of the capacitance value and convert it into an electric signal, through a specific algorithm and circuit processing, these electric signals are further converted into digital signals, and finally displayed on the liquid crystal display screen 5 of the displacement digital display device 3.

[0030] The cylinder 15 is also provided with a stepping motor controller 16 on the outer wall, the stepping motor controller 16 is electrically connected with the stepping motor 22 and is used to control the operation of the stepping motor 22, the stepping motor controller 16 is provided with a display screen 17, a parameter adjustment button 10, an advance control button 11 and a retreat control button 18, wherein the display screen 17 is used to display various parameters when the stepping motor 22 operates, the parameter adjustment button 10 is used to adjust and determine the operating parameters of the stepping motor 22, the advance control button 11 and the retreat control button 18 control the forward and reverse rotation of the stepping motor 22, thereby driving the sampling probe 1 to advance and retreat through the fixed plate 14, and adjusting the position of the sampling probe 1.

[0031] The parameter adjustment button 10 includes + key, - key and confirmation key, and the step motor 22 can be controlled through the parameter adjustment button 10 on the step motor controller 16.

[0032] 1) Speed regulation: in standby or working state, directly press + key to increase motor speed, and press - key to decrease motor speed.

[0033] 2) Mode regulation: after power on, long press the confirmation key for two seconds to enter the setting function, at this time, the function mode P1~P3 can be selected through pressing + key and - key, after selecting the mode, press the confirmation key to confirm, then adjust A parameter (pulse), press + key and - key to add or subtract the pulse number (160 pulse steps motor rotates a circle, and the fixed plate moves 1mm), after adjustment, press the confirmation key to confirm, and the adjustment process is completed.

[0034] P1 mode: continuously press the step motor forward control button, the step motor keeps forward rotation, release the step motor forward control button, the motor stops; continuously press the step motor backward control button, the step motor keeps backward rotation, release the step motor backward control button, the motor stops; P2 mode: press the step motor forward control button, the step motor keeps forward rotation, press the step motor forward control button again, the motor stops; press the step motor backward control button, the step motor keeps backward rotation, press the step motor backward control button again, the motor stops. P3 mode: press the step motor forward control button, the step motor forward rotation A pulse and then stops; press the step motor backward control button, the step motor backward rotation A pulse and then stops.

[0035] The second through hole is further arranged on the bottom surface of the cylinder 15, the power line 19 of the displacement digital display device 3 and the step motor controller 16 passes through the second through hole and is connected with the transformer 20, the transformer 20 is connected with the power plug 21 through the electric wire, thereby supplying power to the displacement digital display device 3, the step motor controller 16 and the step motor 22.

[0036] Working principle

[0037] In use, first connect the power plug with the power supply, at this time, the step motor control device display screen lights up, indicating that the sampler is connected with the power supply. Align the sampling probe with the sampling hole on the pipeline, ensure the stability of the sampler, adjust the step motor control device, press the step motor adjustment button to set the step motor function to P1, then press the step motor adjustment button to confirm the setting, press the digital display switch button, the digital display screen starts to display, adjust the unit through the unit conversion button to the required unit, press the displacement zero reset button, and all the sampler adjustment process is completed. Press the step motor forward control button and the step motor backward control button, cooperate with the displacement digital display device, adjust the sampling probe to the required position for liquid sampling, and place a beaker behind the liquid discharge pipe to collect the liquid sample.

[0038] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pipeline liquid sampler, characterized in that, The device includes a cylindrical body, a fixed plate slidably connected inside the cylindrical body, a sampling probe fixedly connected to the fixed plate, and a screw threadedly connected to the fixed plate, one end of which is fixedly connected to a stepper motor. The fixed plate has a protrusion on its left side, and the inner wall of the cylinder has a sliding groove at the position corresponding to the protrusion. The sliding groove extends along the height direction of the cylinder, and the protrusion is adapted to the sliding groove. A movable grid copper strip is also placed in the chute, and the end of the movable grid copper strip is fixed to the fixed plate. The width of the chute is greater than the width of the movable grid copper strip. A displacement digital display device is provided on the outer wall of the left side of the cylinder, and the displacement digital display device is adapted to the moving grid copper strip.

2. A pipeline liquid sampler as described in claim 1, characterized in that, The fixing plate has a first threaded hole and a second threaded hole. The sampling probe is fixedly connected to the first threaded hole, and the screw is rotatably connected to the second threaded hole.

3. A pipeline liquid sampler as described in claim 2, characterized in that, The cylinder is also connected to a drain pipe, one end of which is fixedly connected to the end of the first threaded hole away from the sampling probe, and the drain pipe is connected to the sampling probe.

4. A pipeline liquid sampler as described in claim 3, characterized in that, The bottom surface of the cylinder has a first through hole, and the end of the drain pipe away from the fixed plate passes through the first through hole and extends to the outside of the cylinder.

5. A pipeline liquid sampler as described in claim 1, characterized in that, The displacement digital display device is equipped with a digital display switch button, an LCD screen, a displacement zeroing button, and a unit conversion button.

6. A pipeline liquid sampler as described in claim 1, characterized in that, A stepper motor controller is also provided on the outer wall of the cylinder, and the stepper motor controller is electrically connected to the stepper motor.

7. A pipeline liquid sampler as described in claim 6, characterized in that, The stepper motor controller is equipped with a display screen, parameter adjustment buttons, forward control buttons, and reverse control buttons. The display screen is used to display various parameters of the stepper motor during operation. The parameter adjustment buttons are used to adjust and determine the operating parameters of the stepper motor. The forward control buttons and reverse control buttons control the forward and reverse rotation of the stepper motor.

8. A pipeline liquid sampler as described in claim 7, characterized in that, A second through hole is also provided on the bottom surface of the cylinder. The power lines of the displacement digital display device and the stepper motor controller pass through the second through hole and are connected to the transformer. The transformer is connected to the power plug through a wire.

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