Ejector with adjustable flow

Abstract

A flow-adjustable ejector comprises an air inlet pipe, a nozzle, an ejector pipeline and a flow channel area adjusting assembly, the nozzle is installed at the inlet end of the ejector pipeline, a flow channel of the nozzle comprises a conical flow channel and a linear flow channel which are arranged in the airflow direction, and the small-diameter end of the conical flow channel is connected with the linear flow channel; the air inlet pipe is vertically connected to the side face of the ejector pipeline, and an air outlet of the air inlet pipe is communicated with the linear flow channel from one side of the nozzle; the runner area adjusting assembly is provided with an adjusting rod capable of linearly moving to adjust the cross sectional area of the outlet end of the nozzle. The flow of the ejector can be timely adjusted according to the frequency change of the variable-frequency compressor in the rotary wheel drying system, so that the stability of airflow is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of nozzles, and in particular relates to an injector with adjustable flow rate. Background Art

[0002] The gas discharged by the air compressor contains a large amount of water, so a dryer is needed to adsorb and dry the water-containing gas to obtain gas with a low dew point after drying. During the operation of the dryer, the dryer needs a stable source of heat to remove the moisture adsorbed in the desiccant. The compressor is a very large power-consuming device in the power system. In order to save energy on the compressor, customers usually choose variable frequency compressors when the terminal gas consumption is unstable. When the variable frequency compressor is adjusted by variable frequency, it means a change in flow rate. The dryer cannot adapt to the variable flow condition, causing the regenerated gas to escape from the ejector outlet and the dew point cannot be guaranteed. At the same time, the regenerated gas volume of the dryer will also be affected, resulting in insufficient regeneration heat and unable to meet the user's low dew point requirements. Utility Model Content

[0003] The utility model aims to provide an ejector with adjustable flow rate, which can timely adjust the ejector flow rate according to the frequency change of the variable frequency compressor in the rotary drying system, thereby ensuring the stability of the airflow.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an injector with adjustable flow rate, comprising an intake pipe, a nozzle, an injector pipe and a flow channel area adjustment component, the nozzle is installed at the inlet end of the injector pipe, the flow channel of the nozzle comprises a conical flow channel and a straight flow channel arranged along the air flow direction, and the small diameter end of the conical flow channel is connected to the straight flow channel; the intake pipe is vertically connected to the side of the injector pipe, and the air outlet of the intake pipe is connected to the straight flow channel from one side of the nozzle; the flow channel area adjustment component has an adjustment rod that can move linearly to adjust the cross-sectional area of ​​the nozzle outlet end.

[0005] The regulating rod is perpendicular to the air flow direction of the linear flow channel and is inserted into the linear flow channel from the side of the nozzle outlet end.

[0006] The flow channel area adjustment component also includes a linear drive mechanism for driving the adjustment rod to move linearly, the fixed end of the linear drive mechanism is fixed to the outside of the pipe wall of the intake pipe, and the telescopic end of the linear drive mechanism is connected to the adjustment rod.

[0007] The linear drive mechanism is an electric push rod, a pneumatic rod or a screw mechanism controlled by a motor.

[0008] The telescopic end of the linear drive mechanism is connected to the adjusting rod through a pin.

[0009] A through hole is provided on the outer side of the pipe wall of the injector pipe for the adjusting rod to vertically pass through, and a sealing ring is arranged around the through hole.

[0010] The ejector pipe is divided into a large diameter section, a small diameter section and a tapered section along the airflow direction; the large diameter section and the small diameter section are connected by a reducing structure, and the small diameter section is connected to the small opening of the tapered section.

[0011] Both ends of the injector pipeline are respectively provided with mounting flanges.

[0012] The beneficial effect of the utility model is that the utility model can realize the linear drive mechanism moving with the frequency of the variable frequency compressor by linking the linear drive mechanism and the variable frequency signal of the variable frequency compressor, thereby changing the cross-sectional area of ​​the nozzle, so that the flow rate of the airflow through the nozzle remains constant, the regeneration gas volume of the regeneration gas is guaranteed, the heat demand of regeneration is met, and finally the impeller is fully regenerated to meet the user's low dew point demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is an axial view of the utility model;

[0015] Markings in the figure: 1. Intake pipe, 2. Nozzle, 3. Linear drive mechanism, 4. Adjustment rod, 5. Sealing ring, 6. Injector pipe, 7. Large diameter section, 8. Small diameter section, 9. Conical section, 10. Conical flow channel, 11. Straight flow channel. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention in any way.

[0017] See attached Figure 1 , 2As shown, an injector with adjustable flow rate includes an air intake pipe 1, a nozzle 2, a flow channel area adjustment component and an injector pipe 6. The injector pipe 6 is designed with a variable cross-section and is divided into three sections along the airflow direction, namely a large diameter section 7, a small diameter section 8 and a tapered section 9. The large diameter section 7 and the small diameter section 8 are both cylindrical sections, and the diameter of the large diameter section 7 is larger than the diameter of the small diameter section 8. The large diameter section 7 and the small diameter section 8 are connected by a reducing structure; the small mouth of the tapered section 9 is connected to the small diameter section 8, and the large mouth of the tapered section 9 is used to inject the gas for drying; the two ends of the injector pipe 6 are respectively provided with mounting flanges for docking and installation with the pipe of the drying system. The nozzle 2 is arranged in the large diameter section 7, and the flow channel of the nozzle 2 includes a tapered flow channel 10 and a straight flow channel 11 connected front and back, and the small diameter end of the tapered flow channel 10 is connected to the straight flow channel 11. The air intake direction of the air intake pipe 1 is perpendicular to the air flow direction of the ejector pipe 6, and the air outlet of the air intake pipe 1 passes through the large diameter section 7 and the nozzle and is connected to the straight flow channel 11 of the nozzle 2. The air intake pipe 1 is used to access the regeneration gas of the rotary drying system. The nozzle can be connected to the high-temperature gas in the rotary drying system that flows through the variable frequency compressor and then undergoes heat exchange.

[0018] The flow channel area adjustment component includes a linear drive mechanism 3 and an adjustment rod 4. The fixed end of the linear drive mechanism 3 is connected to the surface of the regeneration gas inlet pipe 1, and the telescopic end of the linear drive mechanism 3 is connected to the adjustment rod 4. The adjustment rod 4 vertically passes through the large diameter section 7 and is vertically inserted into the outlet end of the linear flow channel 11 of the nozzle 2. The linear drive mechanism 3 drives the adjustment rod 4 to extend and retract, and controls the depth of the adjustment rod 4 extending into the linear flow channel 11, thereby changing the effective cross-sectional area of ​​the outlet of the linear flow channel 11.

[0019] In order to ensure the air tightness of the structure, a sealing ring 5 is provided between the large diameter section 7 and the adjusting rod 4. The sealing ring 5 is fixed on the outer wall of the large diameter section 7. The inner diameter of the sealing ring 5 is smaller than the diameter of the adjusting rod 4, so as to play a sealing role. The sealing ring 5 is an O-ring.

[0020] The linear drive mechanism 3 is an electric push rod, a pneumatic rod or a screw mechanism driven by a micro motor. In this embodiment, an electric push rod is used, and the rod body of the electric push rod is connected to the adjustment rod 4 through a pin.

[0021] When the ejector of the utility model is used in the rotary drying system, the action of the linear drive mechanism 3 is linked with the variable frequency signal of the variable frequency compressor. When the compressor exhaust volume increases, the compressor frequency increases, which will cause the linear drive mechanism 3 to move upward, reduce the length of the adjustment rod 4 in the nozzle 2, and thus increase the cross-sectional area of ​​the nozzle 2; conversely, when the compressor exhaust volume decreases and the compressor frequency decreases, the linear drive mechanism 3 will move downward, increase the length of the adjustment rod 4 in the nozzle 2, and thus reduce the cross-sectional area of ​​the nozzle; therefore, no matter how the compressor gas volume fluctuates, the flow rate of the airflow through the nozzle is kept constant, ensuring the regeneration gas volume of the regeneration gas, meeting the heat demand for regeneration, and finally fully regenerating the rotary wheel, thereby meeting the user's low dew point demand.

[0022] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. An injector with adjustable flow rate, Features: It includes an air intake pipe, a nozzle, an ejector pipe and a flow channel area adjustment component. The nozzle is installed at the inlet end of the ejector pipe. The flow channel of the nozzle includes a tapered flow channel and a straight flow channel arranged along the air flow direction. The small diameter end of the tapered flow channel is connected to the straight flow channel. The air intake pipe is vertically connected to the side of the ejector pipe. The air outlet of the air intake pipe is connected to the straight flow channel from one side of the nozzle. The flow channel area adjustment component has an adjustment rod that can move linearly to adjust the cross-sectional area of ​​the nozzle outlet end.

2. The flow-adjustable injector according to claim 1, Features: The regulating rod is perpendicular to the air flow direction of the linear flow channel and is inserted into the linear flow channel from the side of the nozzle outlet end.

3. The flow-adjustable injector according to claim 2, Features: The flow channel area adjustment component also includes a linear drive mechanism for driving the adjustment rod to move linearly, the fixed end of the linear drive mechanism is fixed to the outside of the pipe wall of the intake pipe, and the telescopic end of the linear drive mechanism is connected to the adjustment rod.

4. The flow-adjustable injector according to claim 3, Features: The linear drive mechanism is an electric push rod, a pneumatic rod or a screw mechanism controlled by a motor.

5. The flow-adjustable injector according to claim 3, Features: The telescopic end of the linear drive mechanism is connected to the adjusting rod through a pin.

6. The flow-adjustable injector according to claim 2, Features: A through hole is provided on the outer side of the pipe wall of the injector pipe for the adjusting rod to vertically pass through, and a sealing ring is arranged around the through hole.

7. The flow-adjustable injector according to claim 1, Features: The ejector pipe is divided into a large diameter section, a small diameter section and a tapered section along the airflow direction; the large diameter section and the small diameter section are connected by a reducing structure, and the small diameter section is connected to the small opening of the tapered section.

8. The flow-adjustable injector according to claim 1, Features: Both ends of the injector pipeline are respectively provided with mounting flanges.

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