CN208091528U - A kind of continuous type gas collection and metering device - Google Patents

Abstract

The utility model discloses a kind of gas collection of continuous work and metering device, in order to solve the problem of existing gas collector friction can not continuously collect greatly with accurate measurement, main feature is as follows：The present apparatus uses two gas collector parallel operations, each gas collector includes discoidal novel piston, limiter, mercury injection orifice, and cylinder, the upper end side wall of cylinder is provided with mercury injection orifice, cylinder outer wall is both provided with limiter up and down, it is slidably connected by mercury seal between novel piston and the inner wall of cylinder, each gas collector is equipped with independent solenoid valve simultaneously, pressure sensor, laser range finder, motor, PID controller, it is connect with computer by communication cable and completes the orderly work of often set gas collector and fill up the shortcomings that can not collecting gas when single collector is vented, realize the continuous collection of gas.

Description

A kind of continuous type gas collection and metering device

Technical field

The utility model is related to a kind of gas collection and metering device for capableing of continuous work, it is particularly suitable for needing accurate Gas collection and metering of the metering with low friction resistance.

Background technology

Currently, well known gas collector is by cylinder, piston, driving device composition.Piston generally uses rubber close Seals need to make its deformation to reach sealing effect by extruding rubber seal, to realize sealing when piston operation, Therefore it in piston operational process, needs to overcome bigger frictional resistance, and can even block sometimes in operational process The phenomenon that, and the continuous collection and metering of bulk gas are cannot achieve, to limit the application of gas collector.

Invention content

In order to solve the problems, such as that existing gas collector exists, the utility model provides one kind being capable of continuous work Gas collector, which uses special sealing means, can greatly reduce frictional resistance when piston operation, and Continual gas collection can be achieved, met to collected gas using high-precision distance measuring sensor and pressure sensor in cylinder The metering requirements of body total amount.

Technical solution adopted by the utility model to solve its technical problems is：It is realized and is lived as sealing material using mercury Sealing when plug operation；The position of piston is accurately measured by laser range finder, pressure sensor accurately measures cylinder interior pressure Power, and then measure the volume of collected gas；Using multiple gas collector parallel operations, computer system is by receiving, locating The signal of reason laser range finder and pressure sensor carrys out the opening and closing of control valve and provides signal for PID controller to control electricity Machine operates and then realizes the continuous collection of gas.

The utility model has the beneficial effects that when reducing device work, frictional resistance when piston is run realizes gas The continuous collection of body, and can realize the volume metering of gas.

Description of the drawings

The utility model is further illustrated with example below in conjunction with the accompanying drawings, in order to illustrate more clearly of the utility model reality The technical solution of example, below will describe example in required attached drawing and be briefly described, it should be apparent that, in being described below Attached drawing be only the utility model protection some examples do not paying creation for those of ordinary skill in the art Property labour under the premise of, other drawings may also be obtained based on these drawings.

Fig. 1 is the utility model piston structure schematic diagram.

Fig. 2 is the utility model gas collector schematic diagram.

Fig. 3 is the system structure schematic diagram of whole device.

1- annulus conduit in figure, 2- pistons, 3- pressure sensors, 4- limiters, 5- mercury injection orifices, 6- laser rangings Instrument, 7- flexible cords, 8- cylinders, 9- valves 3,10-2 gas collector exhaust outlets, 11-4 solenoid valves, (11,10 with figure in not Symbol, valve number and subsequent pressure sensor, laser range finder are intended to number) 12-2 pressure sensors, 13-2 motors, 14-2 PID controllers, 15- pulleys, 16-2 laser range finders, 17- computer systems, 18-1 laser range finders, 19-1 Number PID controller, 20-1 motors, 21-1 pressure sensors, 22-1 gas collector exhaust outlets, 23-1 solenoid valves, 24-2 solenoid valves, 25- air inlets.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts The all other embodiment obtained, shall fall within the protection scope of the present invention.

Fig. 1 is piston structure schematic diagram used in gas collector.Such as Fig. 1 pistons（2）Shape is disc, material Can be organic glass, nylon, polytetrafluoroethylene (PTFE) opens an annular channel in disk center side（1）, the shape of conduit is square Shape.When in use, the annular groove of piston plate and cylinder inner wall form closed annular channel, are formed by injecting mercury into conduit Mercury seal ring is come sealing when realizing that piston is run in cylinder.

Fig. 2 is gas collector structural schematic diagram.If Fig. 2 gas collectors include annulus conduit（1）, piston（2）, pressure Sensor（3）, limiter（4）, mercury injection orifice（5）, laser range finder（6）, flexible cord（7）, cylinder（8）.Before initial use, Flexible cord is pulled by motor（7）Band piston（2）Rise so that annulus conduit（1）With mercury injection orifice（5）In same horizontal line On, mercury is injected into annulus conduit with syringe at this time（1）Interior and cylinder（8）Inner wall forms mercury seal ring.It was using Cheng Zhong, to prevent mercury from leaking, by mercury injection orifice（5）Position as piston（2）Position upper limit value when operation.Pressure passes Sensor（3）, laser range finder（6）It measures in piston operational process respectively, the pressure of cylinder interior gas and the position of piston, it is logical Communication cable is crossed to connect with computer system.Whole device is in limiter（4）Under the action of holding position fix.

Fig. 3 is the gas collection and metering device schematic diagram for capableing of continuous work.It is received as Fig. 3 devices use two gases The structure of storage parallel connection realizes the rotation work of two collectors using the opening and closing of solenoid valve, to realize the continuous of gas It collects.Before collecting gas, No. 2 solenoid valves（24）It keeps it turning on, No. 1 solenoid valve（23）, No. 3 solenoid valves（9）, No. 4 solenoid valves （11）It remains closed.Pass through No. 1 pressure sensor（21）The pressure of No. 1 cylinder interior is measured, the position of piston is initial at this time Position.Work as air inlet（25）When thering is gas to come in, by controlling No. 1 PID controller（19）To open No. 1 motor（19）, and examine The measurement data of pressure measurement force snesor 1, and by the rotation of PID controller control motor, the pressure in No. 1 cylinder is made to maintain one The value of a stabilization allows gas to enough continuously into No. 1 cylinder when No. 1 laser range finder（18）Measure the position of piston When reaching setting upper limit value, No. 1 motor（20）No. 2 solenoid valves are closed in stop motion（24）, computer system（17）Record 1 Laser range finder（18）, No. 1 pressure sensor（22）Data, open No. 1 solenoid valve（23）, No. 1 PID controller（19）Control No. 1 motor（20）Reversion, piston move downward under gravity, and No. 1 cylinder is discharged in gas, first when being fallen under piston When beginning position, No. 1 solenoid valve is closed（23）, No. 1 motor（20）It closes；When No. 1 gas collector is vented（Close No. 2 electromagnetism Valve（24）When）, open No. 3 solenoid valves（9）, No. 2 gas collectors are started to work, by controlling No. 2 PID controllers（14）To open Open No. 2 motors（13）, the initial position of No. 2 pistons is recorded, and detect No. 2 pressure sensors（12）Data, and controlled by PID The rotation of device control motor processed, makes the pressure in No. 2 cylinders maintain a stable value, allows gas to enough continuously enter No. 2 cylinders.When No. 2 laser range finders（16）When detecting that the position of piston 2 reaches setting upper limit value, No. 2 motors（13）Stop Movement, closes solenoid valve 9, and computer system records No. 2 laser range finders（16）, No. 2 pressure sensors（12）Data, open No. 4 solenoid valves（11）, No. 2 PID controllers（14）Control No. 2 motors（13）Reversion, piston move under gravity, will Cylinder 2 is discharged in gas, when falling on initial position 2 under piston 2, closes No. 4 solenoid valves（11）, No. 2 motors（13）It closes；2 When the exhaust of number gas collector（Close No. 3 solenoid valves（9）When）, open No. 2 solenoid valves（24）No. 1 gas collector starts next The work of a cycle.

Which when air inlet is died, no matter being collector at this time in gas collection, surveyed with the operating pressure sensor of motor It obtains pressure to decline, computer system realizes the motor reversal by Control PID controller and closes corresponding air inlet electricity at this time Magnet valve opens exhaust solenoid valve and completes degassing function.And pressure sensor in the gas collector is recorded, the number of laser range finder Factually show the accurate measurement of gas.In case gas collection next time next time.

Claims (6)

1. a kind of continuous type gas collection and metering device, including gas collector and computer system (17), special Sign is：There are two the gas collectors, including the No.1 gas collector of parallel operation and No. two gas collectors, institute The computer system (17) stated is connected with No.1 PID controller (19), No. two PID controllers (14) respectively by conducting wire, institute The gas collection that the No.1 PID controller (19) stated controls No.1 gas collector by No.1 motor (20) works, described The gas collection that No. two PID controllers (14) control No. two gas collectors by No. two motors (13) works, the No.1 Gas collector bottom is provided with No.1 solenoid valve (22) and No. two solenoid valves (24), and No. two gas collector bottoms are provided with three Number solenoid valve (9) and No. four solenoid valves (11), No.1, No. two, No. three, No. four solenoid valves pass through with computer system (17) it is logical Interrogate cable connection.

2. continuous type gas collection according to claim 1 and metering device, it is characterised in that：The gas Collector includes discoidal novel piston (2), limiter (4), mercury injection orifice (5) and cylinder (8), the cylinder (8) Upper end side wall is provided with mercury injection orifice (5), and cylinder (8) outer wall is both provided with limiter (4), the novel piston (2) up and down It is slidably connected by mercury seal between the inner wall of cylinder (8).

3. continuous type gas collection according to claim 1 and metering device, it is characterised in that：Two gases are received The bottom of storage is both provided with pressure sensor, top is both provided with laser range finder, and pressure sensor is equal with laser range finder It is connect with computer system (17) by communication cable, realizes the volume metering function of gas.

4. continuous type gas collection according to claim 1 and metering device, it is characterised in that：Two gases are received Storage is respectively provided with motor, solenoid valve, and PID controller is connect by communication cable with computer system (17), realizes the company of gas Continuous collecting function.

5. continuous type gas collection according to claim 2 and metering device, it is characterised in that：Described is novel Piston (2) center side is provided with annular channel (1), passes through the injection mercury formation mercury seal ring realization into annular channel (1) Sealing of the novel piston (2) in cylinder (8) when sliding.

6. continuous type gas collection according to claim 2 and metering device, it is characterised in that：Described in each Flexible cord (7) is respectively connected on novel piston (2), the flexible cord (7) in No.1 gas collector is connected with No.1 motor (20), and two Flexible cord (7) in number gas collector is connected with No. two motors (13).