VOC generator

Abstract

The utility model discloses a VOC (volatile organic compound) generator, which comprises an injection pump, a sample injector and a generator, a linear module is arranged above the injection pump, the linear module is electrically connected with the injection pump, the sample injector is arranged at one end of the linear module, the sample injector is connected with the generator through a pipeline, and the generator is electrically connected with the injection pump. And the linear module is used for pushing the sample injector to enable the raw materials in the sample injector to enter the generator. According to the VOC generator provided by the utility model, the moving position of the sliding block in the linear module is accurately controlled through the injection pump, and the sliding block pushes the push rod of the sample injector to move by a corresponding distance, so that the flow of liquid VOC entering the generator in the sample injector is accurately controlled, and the quality stability of the liquid VOC entering the generator is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of VOC generators, and particularly relates to a VOC generator. Background Art

[0002] A VOC generator is a general term for devices that can generate a gas stream or atmosphere with a constant and known VOC content under certain conditions, and is a gas generation device that can accurately control the total amount and generation rate of common volatile organic compounds (VOCs) such as formaldehyde, toluene, ethyl acetate, and acetone. It is mainly used in the research and development or testing of fields such as VOC catalysis, filtration materials, sensors, toxicology research, air purification materials, and gas calibration. In related technologies, VOC gas is generally generated by the bubbling method. However, by blowing gas into a liquid to generate bubbles, mass transfer between the gas and the liquid is achieved. However, this method has problems such as unstable concentration and poor repeatability of the generated VOC gas. Content of the Utility Model

[0003] The purpose of the utility model is to propose a VOC generator to solve the problems of unstable concentration and poor repeatability of the generated VOC gas in the prior art.

[0004] To this end, the utility model provides a VOC generator, including: an injection pump, a sampler, and a generator. A linear module is arranged above the injection pump. The linear module is electrically connected to the injection pump. The sampler is arranged at one end of the linear module. The sampler and the generator are connected through a pipeline. The linear module is used to push the sampler so that the raw material in the sampler enters the generator.

[0005] Preferably, the linear module includes a fixed block, a motor base, a lead screw, a guide rod, and a push block. The axial directions of the lead screw and the guide rod are parallel to each other. One end of the lead screw is rotatably connected to the fixed block, and the other end of the lead screw is rotatably connected to the motor base. One end of the guide rod is fixedly connected to the fixed block, and the other end of the guide rod is fixedly connected to the motor base. The push block is slidably connected to the guide rod and is threadedly connected to the lead screw. A motor is arranged inside the motor base. The motor is connected to the lead screw and is used to drive the lead screw to rotate. The injection pump is electrically connected to the motor.

[0006] Preferably, a V-shaped groove is arranged above the motor base, and the sampler is in the V-shaped groove.

[0007] Preferably, the sampler includes a tube body and a push rod. A sealing block is arranged at one end of the push rod, and the sealing block is slidably connected to the tube body.

[0008] Preferably, a baffle is arranged at one end of the tube body, and the baffle is in contact with the end face of the motor base.

[0009] Preferably, the generator includes a housing, a vaporizer, and a temperature controller. The temperature controller is disposed on the outer surface of the housing, the vaporizer is disposed inside the housing, the sampler is connected to the vaporizer through a pipeline, and the temperature controller is electrically connected to the vaporizer. The temperature controller is used to control the heating temperature of the vaporizer.

[0010] Preferably, a gas inlet and a gas outlet are provided on the housing, and the gas inlet and the gas outlet are communicated with the vaporizer.

[0011] Preferably, a flowmeter is provided on the housing, and the flowmeter is connected to the gas inlet and the gas outlet. The flowmeter is used to stably control the gas flow rate.

[0012] Preferably, a heating switch is provided on the housing, and the heating switch is electrically connected to the temperature controller. The heating switch is used to control the start and stop of the temperature controller.

[0013] Preferably, a power supply is disposed inside the housing, a power switch is provided on the housing, the power supply is electrically connected to the vaporizer and the temperature controller, and the power switch is electrically connected to the power supply.

[0014] Advantageous effects:

[0015] 1. The present utility model provides a VOC generator. By precisely controlling the position of the slider moving in the linear module through an injection pump, the slider pushes the push rod of the sampler to move a corresponding distance, thereby precisely controlling the flow rate of the liquid VOC entering the generator, and ensuring the mass stability of the liquid VOC entering the generator.

[0016] 2. In the present utility model, the gas flow rate entering the vaporizer is controlled by a flowmeter, further ensuring the stability of the concentration of the generated VOC gas. Description of the drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of Embodiment 1 of a VOC generator provided by the present utility model.

[0019] Figure 2 It is a schematic structural diagram of the linear module of Embodiment 1 of a VOC generator provided by the present utility model.

[0020] Figure 3 A cross-sectional view of the injector of Embodiment 1 of a VOC generator provided by the present utility model.

[0021] Figure 4 A front structural schematic diagram of the generator of Embodiment 1 of a VOC generator provided by the present utility model.

[0022] Figure 5 A rear structural schematic diagram of the generator of Embodiment 1 of a VOC generator provided by the present utility model.

[0023] In the figure, 1 is an injection pump, 2 is an injector, 21 is a tube body, 22 is a push rod, 23 is a sealing block, 24 is a baffle, 3 is a generator, 31 is a housing, 32 is a vaporizer, 33 is a temperature controller, 34 is a gas inlet, 35 is a gas outlet, 36 is a flow meter, 37 is a heating switch, 38 is a power supply, 39 is a power switch, 4 is a linear module, 41 is a fixing block, 42 is a motor base, 43 is a lead screw, 44 is a guide rod, 45 is a push block, and 46 is a V-shaped groove. Specific embodiments

[0024] The content of the present utility model can be more easily understood by referring to the detailed description of the preferred embodiments of the present utility model below and the included embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. When there is a contradiction, the definition in this specification shall prevail.

[0025] Embodiment 1:

[0026] There is provided a VOC generator as Figures 1-5 shown, including an injection pump 1, an injector 2, and a generator 3. A linear module 4 is disposed above the injection pump 1, and the linear module 4 is electrically connected to the injection pump 1. The injector 2 is disposed at one end of the linear module 4, and the injector 2 and the generator 3 are connected by a pipeline. The linear module 4 is used to push the injector 2 so that the raw material in the injector 2 enters the generator 3.

[0027] The linear module 4 includes a fixed block 41, a motor base 42, a lead screw 43, a guide rod 44, and a push block 45. The axial directions of the lead screw 43 and the guide rod 44 are parallel to each other. One end of the lead screw 43 is rotatably connected to the fixed block 41, and the other end of the lead screw 43 is rotatably connected to the motor base 42. One end of the guide rod 44 is fixedly connected to the fixed block 41, and the other end of the guide rod 44 is fixedly connected to the motor base 42. The push block 45 is slidably connected to the guide rod 44, and the push block 45 is threadedly connected to the lead screw 43. A motor is provided inside the motor base 42. The motor is connected to the lead screw 43, and the motor is used to drive the lead screw 43 to rotate. The injection pump 1 is electrically connected to the motor. Above the motor base 42, there is a V-shaped groove 46, and the sampler 2 is within the V-shaped groove 46. The injection pump 1 controls the rotation of the motor, the motor drives the lead screw 43 to rotate, and the lead screw 43 drives the push block 45 to slide on the guide rod 44.

[0028] The sampler 2 includes a tube body 21 and a push rod 22. One end of the push rod 22 is provided with a sealing block 23, and the sealing block 23 is slidably connected to the tube body 21. One end of the tube body 21 is provided with a baffle 24, and the baffle 24 is in contact with the end face of the motor base 42.

[0029] The generator 3 includes a housing 31, a vaporizer 32, and a temperature controller 33. The temperature controller 33 is provided on the outer surface of the housing 31, the vaporizer 32 is provided inside the housing 31, the sampler 2 is connected to the vaporizer 32 through a pipeline, and the temperature controller 33 is electrically connected to the vaporizer 32. The temperature controller 33 is used to control the heating temperature of the vaporizer 32. A gas inlet 34 and a gas outlet 35 are provided on the housing 31, and the gas inlet 34 and the gas outlet 35 are communicated with the vaporizer 32. A flowmeter 36 is provided on the housing 31, and the flowmeter 36 is connected to the gas inlet 34 and the gas outlet 35. The flowmeter 36 is used to stably control the gas flow rate. The flowmeter 36 in this embodiment is a rotameter 36. A heating switch 37 is provided on the housing 31, and the heating switch 37 is electrically connected to the temperature controller 33. The heating switch 37 is used to control the start and stop of the temperature controller 33. A power supply 38 is provided inside the housing 31, a power switch 39 is provided on the housing 31, the power supply is electrically connected to the vaporizer 32 and the temperature controller 33, and the power switch 39 is electrically connected to the power supply 38.

[0030] Working principle: The injection pump 1 controls the rotation of the motor, the motor drives the lead screw 43 to rotate, and the lead screw 43 drives the push block 45 to slide on the guide rod 44. The cooperation of the V-shaped groove and the baffle 24 realizes the limitation of the sampler 2, so that the sampler 2 is fixed. The push block 45 pushes the push rod 22 to move, so that the liquid VOC raw material in the sampler 2 enters the generator 3. The control accuracy and repeatability accuracy of the injection pump 1 are relatively high, ensuring the stability of the liquid inlet quality.

[0031] Air enters the vaporizer 32 from the gas inlet 34, and the gas flow rate entering the vaporizer 32 is controlled by the flow meter 36. After the air is mixed with the liquid VOC raw material, it is heated in the vaporizer 32 to obtain VOC gas with a corresponding concentration, and the VOC gas is discharged from the gas outlet 35.

Claims

1. A VOC generator, characterized in that: include: A syringe pump, an injector and a generator, wherein a linear module is arranged above the syringe pump, the linear module is electrically connected to the syringe pump, the injector is arranged at one end of the linear module, the injector is connected to the generator through a pipeline, and the linear module is used to push the injector so that the raw material in the injector enters the generator.

2. A VOC generator according to claim 1, characterized in that: The linear module includes a fixed block, a motor base, a screw rod, a guide rod, and a push block. The axial directions of the screw rod and the guide rod are parallel to each other. One end of the screw rod is rotatably connected to the fixed block, and the other end of the screw rod is rotatably connected to the motor base. One end of the guide rod is fixedly connected to the fixed block, and the other end of the guide rod is fixedly connected to the motor base. The push block is slidably connected to the guide rod, and the push block is threadedly connected to the screw rod.

3. A VOC generator according to claim 2, characterized in that: A V-shaped groove is arranged above the motor seat, and the sample injector is in the V-shaped groove.

4. A VOC generator according to claim 3, characterized in that: The sample injector comprises a tube body and a push rod, one end of the push rod is provided with a sealing block, and the sealing block is slidably connected with the tube body.

5. A VOC generator according to claim 4, characterized in that: A baffle is provided at one end of the tube body, and the baffle is fitted with the end surface of the motor seat.

6. A VOC generator according to claim 1, characterized in that: The generator includes a shell, a vaporizer, and a temperature controller. The temperature controller is arranged on the outer surface of the shell, the vaporizer is arranged inside the shell, the injector is connected to the vaporizer through a pipeline, and the temperature controller is electrically connected to the vaporizer.

7. A VOC generator according to claim 6, characterized in that: The shell is provided with a gas inlet and a gas outlet, and the gas inlet and the gas outlet are communicated with the vaporizer.

8. A VOC generator according to claim 7, characterized in that: A flow meter is arranged on the housing, and the flow meter is connected with the gas inlet and the gas outlet.

9. A VOC generator according to claim 6, characterized in that: The housing is provided with a heating switch, and the heating switch is electrically connected to the temperature controller.

10. A VOC generator according to claim 6, characterized in that: A power source is arranged in the shell, a power switch is arranged on the shell, the power source is electrically connected to the vaporizer and the temperature controller, and the power switch is electrically connected to the power source.

Images