CN203534864U

CN203534864U - Fluid sampling device

Info

Publication number: CN203534864U
Application number: CN201320582482.7U
Authority: CN
Inventors: 易丽德; 罗俊; 余晔; 谭伟
Original assignee: Shenzhen Green Grace Green Technology Co Ltd
Current assignee: Shenzhen Green Grace Green Technology Co Ltd
Priority date: 2013-09-18
Filing date: 2013-09-18
Publication date: 2014-04-09
Anticipated expiration: 2023-09-18

Abstract

The utility model provides a fluid sampling device which comprises a peristaltic pump for sucking or discharging fluid, a liquid level measuring system for measuring the liquid level of the fluid, and a control unit, wherein the liquid level measuring system is connected with the peristaltic pump; the control unit is respectively electrically connected with the peristaltic pump and the liquid level measuring system. Due to arrangement of the peristaltic pump, the fluid such as sewage and chemical agents can be sucked from the tube of the peristaltic pump when being sampled, and the fluid is only contacted with the tube, so that the fluid is prevented from staining or corroding other components of the device, and meanwhile the sucking amount of the fluid can be understood according to the liquid level measuring system, the control unit can be operated to stop the operation of the peristaltic pump after achieving the expected amount, and the fluid of the expected amount can be precisely sucked.

Description

A kind of fluid sampling apparatus

Technical field

The utility model relates to the technical field that fluid sampling detects, and relates in particular to a kind of fluid sampling apparatus.

Background technology

Current fluid sampling apparatus, during sampling, as drawn sewage, be commonly and utilize the pump himself configuring to get parts absorption sewage, but these pumps are got stained, the corrosion etc. that is easily subject to sewage when parts are drawn sewage, in the course of time, cause pump to get damage and the disabler of parts.In addition, current fluid sampling apparatus, usually, is difficult to effectively control the uptake of required fluid, like this, affects undoubtedly follow-up detection analysis.

Therefore, be necessary to provide a kind of technological means to address the aforementioned drawbacks.

Utility model content

The purpose of this utility model is to overcome the defect of prior art, a kind of accurately fluid sampling apparatus of draw fluid reagent is provided, to solve in prior art fluid sampling apparatus, exist and be easily subject to that fluid reagent is stained, the problem of corrosion, and the problem that is difficult to effectively to control the uptake of required fluid.

The utility model is achieved in that a kind of fluid sampling apparatus, comprises that level gauge system is connected with described peristaltic pump in order to the peristaltic pump of absorption or discharge fluid, in order to measure level gauge system and the control module of liquid level in described fluid; Control module is electrically connected to described peristaltic pump, described level gauge system respectively.

Particularly, described peristaltic pump comprises lid, drive motor, pump line and pump head, and described pump head is located at the inside of described lid, and described drive motor is located at the outside of described lid;

Described drive motor is connected in described pump head, and this drive motor is electrically connected to described control module;

Described pump line stretches into described lid and is close to the idler wheel mechanism of walking around described pump head, and in this pump line, is divided into passing in and out that first of its inside is imported and exported and second import and export the outside of being all located at described lid for fluid of its two ends.

Further, the idler wheel mechanism of described pump head has several and is circumference in order to the roller of pump line described in roll extrusion, and described several rollers are close to described pump line.

Preferably, described roller has four, and this four rolling is layout symmetrically and evenly.

Particularly, described peristaltic pump also comprises and is located on described lid the fixture on described lid in order to fixing described pump line.

Further, described fixture comprise in order to fixedly have the described first described pump line of importing and exporting one end the first fixture and in order to fixedly to there is second fixture of the other end of the described pump line of described the second import and export, described the first fixture is relative with described the second fixture and is located on described lid.

Particularly, described control module is step actuator, and this step actuator has the module that rotates backward with reverse speed that rotates backward of controlling the forward rotation of described pump head and the forward rotation module of forward rotational speed, controlling described pump head.

Particularly, described level gauge system is electromagnetic induction liquid level gauge.

Technique effect of the present utility model is: owing to having configured peristaltic pump, during sampling, the fluid of sewage, chemical reagent and so on can be drawn from the pump line of peristaltic pump, and fluid also only can contact with pump line, avoids other parts of the stained or corrosion device of fluid; Meanwhile, can know according to level gauge system the uptake of fluid, and reach after desired amount the work that can operation control unit stops peristaltic pump, effectively guarantee accurately to draw the amount of required fluid.

Accompanying drawing explanation

Fig. 1 is the counter-rotational schematic diagram of pump head of the fluid sampling apparatus of the utility model embodiment;

Fig. 2 is the schematic diagram of pump head forward rotation of the fluid sampling apparatus of the utility model embodiment.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

Refer to shown in Fig. 1 and Fig. 2, the utility model provides a kind of fluid sampling apparatus 10, comprise peristaltic pump 20 in order to draw or to discharge fluid, in order to measure level gauge system (not indicating in figure) and the control module (not indicating in figure) of liquid level in described fluid, level gauge system is connected with peristaltic pump 20; Control module is electrically connected to peristaltic pump 10, level gauge system respectively.

Wherein, peristaltic pump 20 is a kind of liquid transporting apparatus of controllable flow speed.Commonly by repeated compression elastic tube, content in pipe is moved towards certain orientation, its flow velocity is determined by diameter and the compression speed of pipe.And peristaltic pump 20 is with respect to other lift suction pump, it has the following advantages:

1, pollution-free: fluid only contacts pump line, do not contact the pump housing;

2, precision is high: repeatable accuracy, and steady state accuracy is high;

3, low-shearing force: be to carry shear-sensitive, the ideal tools of aggressivity high current body;

4, good airproof performance: have good suction capacity, idle running, can anti-backflow;

5, safeguard simply: valveless and seal;

6, there is two-way equal flow transport capacity; In no liquid dry run situation, can not cause damage to any parts of pump; Can produce the vacuum tightness that reaches 98%; There is no valve, mechanical seal and stuffing seal, just do not have these to produce the factor of revealing and safeguarding yet; Can carry easily solid, liquid or gas-liquid mixed phase fluid, allow contained solid diameter in fluid to reach tube element internal diameter 40%; Can carry the various materials with grinding, burn into oxygen sensitivity characteristic and various food etc.; Only the parts of flexible pipe for needing to replace, change operation very simple; Except flexible pipe, institute's conveying products does not contact with any parts.

Like this, during sampling, the fluid of sewage, chemical reagent and so on can be drawn from the pump line 22 of peristaltic pump 20, and fluid also only can contact with pump line 22, avoids other parts of the stained or corrosion device of fluid; Meanwhile, user can know according to level gauge system the uptake of fluid, and reaches after desired amount the work that can operation control unit stops peristaltic pump 20, effectively guarantees accurately to draw the amount of required fluid.

Shown in Fig. 1 and Fig. 2, the peristaltic pump 20 in this case comprises lid 21, drive motor (not indicating in figure), pump line 22 and pump head 23, and pump head 23 is located at the inside of lid 21, and drive motor is located at the outside of lid 21.

Wherein, pump line 22: have certain elasticity, flexible pipe radially can recover rapidly shape (shore hardness 40-80) after pressurized; Have certain wearing quality, have certain bearing capacity, non-leakage (impermeability is good) adsorbability is low, and temperature tolerance is good, is difficult for agingly, and swelling, not anticorrosive, and precipitate is low etc.

Pump head: realize squeezing tube major function and other subsidiary functions.

Drive motor: realize and drive pump head spinfunction and other subsidiary functions.

In addition, drive motor is connected in pump head 23, and this drive motor is electrically connected to control module, so that control module is controlled the rotating operation of pump head 23 by controlling drive motor.

Pump line 22 stretches into lid 21 and is close to the idler wheel mechanism 230 of walking around pump head 23, and the outside of lid 21 is all located in first import and export the 221 and second import and export 222 that supply fluid to pass in and out its inside that are divided into its two ends in this pump line 22, thus, during sampling, pump line 22 is by its first import and export 221 draw fluid reagent, and the amount that pump line 22 sucks fluid reagents can be controlled its roll extrusion by idler wheel mechanism 230; Meanwhile, pump line 22 is discharged fluid reagents by its second import and export 222, and the amount that pump line 22 is discharged fluid reagents is also by idler wheel mechanism 230, its roll extrusion to be controlled.

Shown in Fig. 1 and Fig. 2, the idler wheel mechanism 230 of pump head 23 has several and is circumference in order to the roller 231 of roll extrusion pump line 22, and several rollers 231 are close to pump line 22, to guarantee constantly to push pump line 22.Preferably, roller 231 has four, and this four rolling 231 is symmetrically and evenly and arranges, so that wheel mechanism 230 can push pump line 22 rationally and effectively, but the enforcement of this case is not as limit.

Particularly, peristaltic pump 20 also comprises and being located on lid 21 in order to the fixing fixture 24 of pump line 22 on lid 21.

Further, fixture 24 comprise in order to fixedly have the first import and export 221 pump line 22 one end the first fixture 241 and in order to fixedly to there is second fixture 242 of the other end of the pump line 22 of the second import and export 222, the first fixture 241 is relative with the second fixture 242 to be located on lid 21, in order to guarantee effectively fixedly pump line 22.

Preferred version as the present embodiment, control module is step actuator, and this step actuator have control peristaltic pump 20 the forward rotation of pump head 23 and the forward rotation module of forward rotational speed, control peristaltic pump 20 pump head 23 rotate backward the module that rotates backward with reverse speed.Be specially, during sampling, by selecting to rotate backward the function of module on step actuator, so that pump head 23 rotates backward and make fluid reagent to import and export 221 from first of pump line 22, enter; And need to discharge fluid reagent time, by selecting the function of forward rotation module on step actuator, so that pump head 23 forward rotation make fluid reagent import and export 222 from second of pump line 22 to discharge.

Preferably, level gauge system is electromagnetic induction liquid level gauge.And the principle of work of this electromagnetic induction liquid level gauge is: one group of dry spring module and precision resistance are housed in the detector tube of electromagnetic induction liquid level gauge, when outside pipe, magnetic float changes up and down with liquid level, the dry spring that is positioned at liquid level place in detector tube is connected successively the resistance value of transmitter is changed, change-over circuit module in terminal box converts its resistance to continuous current signal or the resistance signal output of 20mA, be sent to instrument or other secondary display device, realize remote monitoring.Thus, by adopting electromagnetic induction liquid level gauge, can effectively control the uptake of fluid reagent, be especially sewage, acid-base class chemical reagent etc.

Below in conjunction with diagram, the principle of work of fluid sampling apparatus 10 of the present utility model is further described:

During sampling, by selecting to rotate backward the function of module on step actuator, when drive motor receives after corresponding instruction, it can make pump head 23 rotate backward, and the idler wheel mechanism 230 meeting roll extrusion pump lines 22 of pump head 23, now, pump head 23 can make fluid reagent left on pump line 22 throw away, and along with recovering shape after pump line 22 pressurizeds, pump line 22 is inner can produce vacuum, like this, fluid reagent just can enter from the first import and export 221 of pump line 22; And when that fluid reagent in electromagnetic induction liquid level gauge arrives is high-order (or meta, low level), peristaltic pump 20 is can be immediately out of service and in the inner negative pressure that form of its pump line 22, now, the negative pressure in pump line 22 can make in electromagnetic induction liquid level gauge liquid transfixion.

While discharging fluid reagent, by selecting the function of forward rotation module on step actuator, when drive motor receives after corresponding instruction, it can make pump head 23 forward rotation, and the idler wheel mechanism 230 meeting roll extrusion pump lines 22 of pump head 23, now, pump head 23 can make the fluid reagent on pump line 22 discharge.

The foregoing is only the utility model preferred embodiment; its structure is not limited to the above-mentioned shape of enumerating; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a fluid sampling apparatus, is characterized in that, comprising:

In order to draw or to discharge the peristaltic pump of fluid;

In order to measure the level gauge system of liquid level in described fluid, be connected with described peristaltic pump; And

Control module, is electrically connected to described peristaltic pump, described level gauge system respectively.

2. fluid sampling apparatus as claimed in claim 1, is characterized in that: described peristaltic pump comprises lid, drive motor, pump line and pump head, and described pump head is located at the inside of described lid, and described drive motor is located at the outside of described lid;

3. fluid sampling apparatus as claimed in claim 2, is characterized in that: the idler wheel mechanism of described pump head has several and is circumference in order to the roller of pump line described in roll extrusion, and described several rollers are close to described pump line.

4. fluid sampling apparatus as claimed in claim 3, is characterized in that: described roller has four, and this four rolling is layout symmetrically and evenly.

5. fluid sampling apparatus as claimed in claim 2, is characterized in that: described peristaltic pump also comprises to be located on described lid in order to fix the fixture of described pump line on described lid.

6. fluid sampling apparatus as claimed in claim 5, it is characterized in that: described fixture comprise in order to fixedly have the described first described pump line of importing and exporting one end the first fixture and in order to fixedly to there is second fixture of the other end of the described pump line of described the second import and export, described the first fixture is relative with described the second fixture and is located on described lid.

7. fluid sampling apparatus as claimed in claim 2, it is characterized in that: described control module is step actuator, and this step actuator has the module that rotates backward with reverse speed that rotates backward of controlling the forward rotation of described pump head and the forward rotation module of forward rotational speed, controlling described pump head.

8. the fluid sampling apparatus as described in claim 1-7 any one, is characterized in that: described level gauge system is electromagnetic induction liquid level gauge.