A new type of multi-pass ejector

Abstract

The present application relates to the technical field of air pressure control device, provide a new multi-pass ejector, including ejector mixing chamber, the ejector mixing chamber has exhaust port and suction port respectively butt joint external equipment, the ejector mixing chamber is connected with the nozzle inlet, the nozzle inlet is connected with the intake three-way valve, in the other two end pipeline of intake three-way valve, one end pipeline is connected with compressed air, the other end pipeline is used for compressed air outlet.The present application can make the suction port of the ejector mixing chamber produce negative pressure, so that the equipment or container produces negative pressure, also can make the compressed air outlet produce positive pressure, so that the equipment or container produces positive pressure;Conveniently realize effective butt joint, also more easily maintain, can greatly save operation time, avoid the possibility of misoperation.

Description

TECHNICAL FIELD

[0001] The present application relates to a new multi-pass ejector, belonging to the technical field of air pressure control devices. BACKGROUND

[0002] At present, many devices or containers in industrial production need to be installed with ejectors. The inlet of the ejector is connected to compressed air, and the compressed air flows out from the nozzle into the mixing chamber of the ejector at a high speed to form a jet and produce a swirling flow. Due to the high-speed flow of air, a negative pressure area is generated in the mixing chamber. Due to the action of negative pressure, the air in the device or container is sucked into the mixing chamber through the inlet of the mixing chamber, and the momentum exchange is carried out with the jet gas. The velocity field is gradually distributed uniformly during the flow process. Then the mixed fluid enters the diffusion chamber and the silencer chamber, at this time the pressure rises due to the reduction of flow rate, and finally the mixed fluid is discharged into the atmosphere through the exhaust port.

[0003] In the industrial use scene, in addition to the need to generate negative pressure in the device or container, in some production processes, it is also necessary to generate positive pressure in the device or container to prevent gas or other substances from entering it. The ejector in the prior art can only suck the gas in the device or container and generate negative pressure in the device or container, but cannot inject compressed air into the device or container to generate positive pressure. Conversely, if the ejector in the prior art is used to inject compressed air into the device or container to generate positive pressure, it cannot suck the gas in the device or container and generate negative pressure in the device or container. SUMMARY

[0004] To solve the above technical problems, the present application provides a new multi-pass ejector which can generate negative pressure in the device or container and can also generate positive pressure in the device or container.

[0005] The present application is realized by the following technical solutions.

[0006] The new multi-pass ejector provided by the present application comprises an ejector mixing chamber, the ejector mixing chamber is respectively connected to an exhaust port and an air inlet to connect to an external device, a nozzle inlet is connected to the ejector mixing chamber, an air inlet three-way valve is connected to the nozzle inlet, one end of the pipeline of the air inlet three-way valve is connected to compressed air, and the other end of the pipeline of the air inlet three-way valve is used for compressed air outlet.

[0007] The end of the air inlet three-way valve connected to the compressed air is connected to a compressed air pipe.

[0008] The exhaust direction of the ejector mixing chamber is connected to a silencer.

[0009] The air inlet of the ejector mixing chamber is provided with a mixing chamber air inlet valve.

[0010] The valve linkage handle is linked to the air inlet three-way valve.

[0011] The linkage mode of the valve linkage handle is that when the air inlet valve of the mixing chamber is closed, the valve linkage handle drives the air inlet three-way valve to guide the pipeline connected to the compressed air and the pipeline for the compressed air outlet; when the air inlet valve of the mixing chamber is opened, the valve linkage handle drives the air inlet three-way valve to guide the pipeline connected to the compressed air and the pipeline connected to the nozzle inlet.

[0012] The exhaust port of the ejector mixing chamber and the compressed air outlet pipeline opening of the air inlet three-way valve are oriented in the same direction.

[0013] The muffler is provided with a bracket for fixing on an external device.

[0014] The nozzle inlet is connected to the ejector mixing chamber in the same direction as the exhaust direction of the ejector mixing chamber.

[0015] The beneficial effects of the present application are that the air inlet of the ejector mixing chamber can produce negative pressure, thereby producing negative pressure in the device or container, and the compressed air outlet can produce positive pressure, thereby producing positive pressure in the device or container; it is convenient to realize effective docking, and it is easier to maintain, which can greatly save operation time and avoid the possibility of misoperation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present application;

[0017] Figure 2 is Figure 1 a side view.

[0018] In the figure: 1 - muffler, 2 - ejector mixing chamber, 3 - nozzle inlet, 4 - air inlet three-way valve, 5 - compressed air pipe, 6 - air inlet valve of mixing chamber, 7 - valve linkage handle. DETAILED DESCRIPTION

[0019] The technical solutions of the present application are further described below, but the scope of protection is not limited to the description.

[0020] The first embodiment of the present application relates to a new multi-channel ejector, such as Figure 1 , Figure 2As shown, the device comprises an ejector mixing chamber 2, the ejector mixing chamber 2 has an exhaust port and a suction port respectively, and the ejector mixing chamber 2 is connected with a nozzle inlet 3, the nozzle inlet 3 is connected with an air inlet three-way valve 4, and the other two ends of the air inlet three-way valve 4 are connected with a compressed air pipeline and a compressed air outlet pipeline respectively. Thus, the compressed air is filled from the air inlet three-way valve 4, and based on the adjustment of the air inlet three-way valve 4, the suction port of the ejector mixing chamber 2 can generate negative pressure, so that the device or container generates negative pressure, or the compressed air outlet pipeline can generate positive pressure, so that the device or container generates positive pressure.

[0021] Specifically, the end of the air inlet three-way valve 4 connected with the compressed air pipeline is connected with a compressed air pipeline 5. The compressed air pipeline 5 is connected with the externally input compressed air, which is more convenient for effective docking of the air inlet three-way valve 4 and easier to maintain.

[0022] Further, the exhaust direction of the ejector mixing chamber 2 is connected with a silencer 1. The silencer 1 is mainly used to reduce the sound wave generated by the exhaust of the ejector mixing chamber 2, so as to avoid the adverse effects of sound wave vibration on other devices.

[0023] Further, in order to facilitate installation and fixation and convenient maintenance and replacement, the silencer 1 is provided with a bracket for fixing on the external device.

[0024] The second embodiment of the present application is basically the same as the first embodiment, and mainly differs in that the suction port of the ejector mixing chamber 2 is provided with a mixing chamber air inlet valve 6. Thus, the stability of the work is ensured, and especially when the compressed air outlet pipeline generates positive pressure, the suction port of the ejector mixing chamber 2 will not intake air.

[0025] Further, the mixing chamber air inlet valve 6 is provided with a valve linkage handle 7, and the valve linkage handle 7 is linked with the air inlet three-way valve 4. Thus, the two modes of generating negative pressure and generating positive pressure can be relatively fixedly switched, and only one step action is required when the switching is operated, the operation time is saved, and the possibility of misoperation is avoided.

[0026] Further, as a preferred scheme of the linkage of the valve linkage handle 7, the linkage mode of the valve linkage handle 7 is that when the mixing chamber air inlet valve 6 is closed, the valve linkage handle 7 drives the air inlet three-way valve 4 to conduct the pipeline connected with the compressed air and the pipeline for the compressed air outlet; and when the mixing chamber air inlet valve 6 is opened, the valve linkage handle 7 drives the air inlet three-way valve 4 to conduct the pipeline connected with the compressed air and the pipeline connected with the nozzle inlet 3.

[0027] Specifically, the exhaust port of the ejector mixing chamber 2 and the compressed air outlet pipeline opening of the intake three-way valve 4 are oriented in the same direction. Thus, installation is facilitated, and in particular, one three-way pipeline can be used to connect the exhaust port of the ejector mixing chamber 2 and the compressed air outlet pipeline opening of the intake three-way valve 4, so that one pipeline can be connected to the equipment or container, and the functions of generating negative pressure and positive pressure can be realized.

[0028] The third embodiment of the present application combines the first and second embodiments. One end of the ejector mixing chamber 2 is connected to the muffler 1 through a connecting pipe, and the other end is connected to the nozzle inlet 3. The bottom end of the ejector mixing chamber 2 is connected to the mixing chamber intake valve. The other end of the nozzle inlet 3 is connected to the intake three-way valve 4, and the other end of the intake three-way valve is connected to the compressed air pipe 5. The bottom ends of the mixing chamber intake valve 6 and the intake three-way valve 4 are connected to the industrial equipment or container. The valve rotating mechanisms of the mixing chamber intake valve 6 and the intake three-way valve 4 are connected together through the connecting rod mechanism of the valve linkage handle 7, and the valve rotating mechanisms of the mixing chamber intake valve 6 and the intake three-way valve 4 can be controlled in linkage through the rotation of the handle of the valve linkage handle 7. The muffler 1 is installed on the industrial equipment or container through the self-provided support.

[0029] During operation, the valve linkage handle 7 is rotated to switch between the vacuum pumping mode and the positive pressure charging mode.

[0030] Vacuum pumping mode: When the valve linkage handle 7 is in the vacuum pumping mode, the connection between the bottom end of the intake three-way valve 4 and the equipment or container is in a closed state; the connection between the intake three-way valve 4 and the nozzle inlet 3 is in a conductive state; the connection between the bottom end of the mixing chamber intake valve 6 and the equipment or container is in a conductive state; compressed air enters the intake three-way valve 4 through the compressed air pipe 5, then enters the ejector mixing chamber 2 through the nozzle inlet 3, forms a jet flow in the ejector mixing chamber 2, and generates a swirling flow. Due to the high-speed air flow, a negative pressure area is generated in the mixing chamber. The negative pressure sucks the gas in the equipment or container through the mixing chamber intake valve 6 into the ejector mixing chamber 2. The mixed gas then enters the diffusion chamber and the muffler 1, and finally is discharged into the atmosphere through the exhaust pipe. Due to the suction effect of the ejector, the gas in the equipment or container is carried away, and the internal pressure is reduced to form a negative pressure.

[0031] Charged positive pressure mode: when the valve control handle 7 is in the charged positive pressure mode, the bottom end of the inlet three-way valve 4 is in the open state with the device or container; the connection between the inlet three-way valve 4 and the nozzle inlet 3 is in the closed state; the bottom end of the mixing chamber inlet valve 6 is in the closed state with the device or container; compressed air enters the inlet three-way valve 4 through the compressed air pipe 5, and then enters the device or container through the connection between the inlet three-way valve 4 and the device or container. Since the bottom end of the mixing chamber inlet valve 6 is in the closed state with the device or container, the gas pressure in the device or container rises, realizing the charged positive pressure function.

Claims

1. A new type of multi-pass ejector comprising an ejector mixing chamber (2), characterized in that: The ejector mixing chamber (2) has exhaust port and suction port respectively, and is connected with external equipment. The ejector mixing chamber (2) is connected with a nozzle inlet (3). The nozzle inlet (3) is connected with an air inlet three-way valve (4). In the other two ends of the air inlet three-way valve (4), one end is connected with compressed air, and the other end is used for compressed air outlet. The suction port of the ejector mixing chamber (2) is provided with a mixing chamber air inlet valve (6). The mixing chamber air inlet valve (6) is provided with a valve joint control handle (7). The valve joint control handle (7) is connected with the air inlet three-way valve (4). The valve joint control handle (7) is connected in the following way: when the mixing chamber air inlet valve (6) is closed, the valve joint control handle (7) drives the air inlet three-way valve (4) to connect the compressed air pipeline and the compressed air outlet pipeline. When the mixing chamber air inlet valve (6) is opened, the valve joint control handle (7) drives the air inlet three-way valve (4) to connect the compressed air pipeline and the pipeline connected with the nozzle inlet (3).

2. The novel multi-pass ejector of claim 1 wherein: The air inlet three-way valve (4) is connected with a compressed air pipe (5).

3. The novel multi-pass ejector of claim 1 wherein: The ejector mixing chamber (2) is connected with a silencer (1) in the exhaust direction.

4. The novel multi-pass ejector of claim 1 wherein: The exhaust port of the ejector mixing chamber (2) and the compressed air outlet pipeline of the air inlet three-way valve (4) are opened in the same direction.

5. The novel multi-pass ejector of claim 3 wherein: The silencer (1) is provided with a bracket for fixing on external equipment.

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