Ejector for external injection ring

Abstract

The present invention discloses an ejector with an external ejection ring, comprising an ejector body, a piston assembly, an ejection ring, a rocker arm assembly, and a valve. The ejector body is provided with a high-pressure gas interface, a mounting channel, an ejection ring interface, and an inflation channel. The piston assembly is mounted within the mounting channel and comprises a connected piston and piston rod, and a piston spring for driving the piston back to its original position. The ejection ring is located outside the ejector body, directly above the inlet end of the inflation channel, and is connected and communicated with the ejection ring interface. It comprises a connected straight pipe and a ring pipe with a nozzle. The rocker arm assembly comprises a rocker arm swingably mounted on the ejector body and a rocker arm spring for driving the rocker arm back to its original position. By externally placing the ejection ring, the ejector achieves higher ejection efficiency and can meet the requirements for rapid inflation of medium and large rescue equipment.

Description

Technical Field

[0001] The invention relates to water emergency equipment, in particular to an ejector with an external ejection ring. Background Art

[0002] As the frequency and range of aircraft missions in sea and water areas increase, the demand for emergency inflation equipment on water has also increased dramatically. When an aircraft makes an emergency landing on water, the rescue equipment needs to be inflated through the inflation system, which is generally required to reach working pressure within ten seconds. However, the installation interface and weight requirements on the aircraft place strict restrictions on the gas cylinders of the rescue equipment, and oversized gas cylinders cannot be used to solve the problem of rapid inflation. The ejector can use the high-pressure gas in the onboard gas cylinder as the working fluid, and utilize the Venturi effect formed inside the ejector to draw a large amount of air from the external environment into the rescue equipment, achieving the purpose of rapid inflation while also reducing the weight and volume of the onboard gas cylinder. However, the current ejector uses a built-in injection ring, which has low ejection efficiency and is difficult to meet the demand for rapid inflation of large and medium-sized rescue equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide an ejector with an external ejection ring. The ejector places the ejection ring externally, has higher ejection efficiency, and can meet the requirements for rapid inflation of medium and large rescue equipment.

[0004] The technical solution adopted in the present invention is:

[0005] An ejector with an external ejection ring comprises an ejector body, a piston assembly, an ejection ring, a rocker arm assembly and a valve; the ejector body is provided with a high-pressure gas interface, a mounting channel, an ejection ring interface and an inflation channel, and the high-pressure gas interface is communicated with the ejection ring interface and the mounting channel at the same time; the piston assembly is installed in the mounting channel, comprising a connected piston and piston rod, and a piston spring for driving the piston to return, the piston being fitted at the inlet end of the mounting channel, and the piston rod extending out of the mounting channel; the ejection ring is located outside the ejector body, directly above the inlet end of the inflation channel, and is connected and communicated with the ejection ring interface The ejector port comprises a straight tube and an annular tube which are connected and have nozzles, and the straight tube is placed horizontally in the middle of the annular tube; the rocker arm assembly comprises a rocker arm which can be swingably mounted on the ejector body, and a rocker arm spring for driving the rocker arm to reset; the rocker arm is hinged to the piston rod and is connected to the valve at the end; initially, the valve presses the outlet end of the inflation channel closed under the action of the piston spring and the rocker arm spring; when the high-pressure gas interface is inflated, one path of high-pressure gas overcomes the force of the piston spring and the rocker arm spring to apply an opening force to the valve through the piston assembly and the rocker arm assembly, and the other path of high-pressure gas applies an opening force to the valve through the injection ring.

[0006] Preferably, the ejector body includes a shell and an end seat, the mounting channel and the inflation channel are arranged side by side on the shell, the high-pressure gas interface and the injection ring interface are arranged on the end seat, and the end seat is installed at the entrance of the mounting channel on the shell.

[0007] Preferably, the piston assembly also includes a sleeve, which is provided with an inner step and an outer flange. The sleeve is threadedly connected to the outlet end of the installation channel and is positioned by the outer flange. The piston spring is sleeved on the piston rod, which is provided with a protrusion. The two ends of the piston spring are limited by the inner step and the protrusion respectively.

[0008] Preferably, the rocker arm is rotatably mounted on the ejector body via a rocker arm fixing seat.

[0009] Preferably, the rocker arm is connected to the valve via a screw.

[0010] Preferably, the valve is provided with a sealing ring for sealing on the outlet end of the inflation channel.

[0011] The beneficial effects of the present invention are:

[0012] The ejector places the injection ring outside, and the injection ring is directly and completely exposed to the high-pressure gas, which can increase the contact area between the high-pressure working gas and the injection ring. At the same time, it also increases the contact area with the ejected air, so that the three can better realize energy transfer, drive more air to be inhaled, and achieve a better mixing effect. The ejection ratio is higher than that of other ejectors, and the ejection efficiency is higher. It can meet the requirements of rapid inflation of medium and large rescue equipment, and can greatly reduce the packaging volume and weight of emergency equipment products. It has a very broad application prospect. The ejector adopts a piston assembly and a rocker arm assembly to perform two-stage control of the valve, and uses the piston spring and the rocker arm spring to apply force at the same time, and has good one-way sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the ejector of the external injection ring in the present invention.

[0014] Figure 2 It is a top view of the installation of the injection ring in the present invention.

[0015] Figure 3 yes Figure 2 View from the center A direction.

[0016] In the figure: 1-housing, 2-piston, 3-piston spring, 4-piston rod, 5-sleeve, 6-rocker arm fixing seat, 7-rocker arm spring, 8-rocker arm, 9-valve, 10-sealing ring, 11-injection ring, 12-end seat, 13-straight pipe, 14-ring pipe, 15-high-pressure gas interface. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and examples.

[0018] This embodiment discloses an ejector with an external injection ring 11, such as Figures 1 to 3 As shown: it includes an ejector body, a piston assembly, an injection ring 11, a rocker arm assembly and a valve 9; wherein: the ejector body is provided with a high-pressure gas interface 15, a mounting channel, an injection ring 11 interface and an inflation channel, and the high-pressure gas interface 15 is communicated with both the injection ring 11 interface and the mounting channel; the piston assembly is installed in the mounting channel, and includes a connected piston 2 and piston rod 4, and a piston spring 3 for driving the piston 2 to return, the piston 2 is fitted at the inlet end of the mounting channel, and the piston rod 4 extends out of the mounting channel; the injection ring 11 is located outside the ejector body, directly above the inlet end of the inflation channel, connected and communicated with the injection ring 11 interface, and includes a connected straight pipe 13 and an annular pipe 14 with a nozzle, and the straight pipe 13 is horizontally placed in the middle of the annular pipe 14; the rocker arm assembly includes a rocker arm 8 swingably mounted on the ejector body, a rocker arm spring 7 for driving the rocker arm 8 to return, the rocker arm 8 is hinged to the piston rod 4 and connected to the valve 9 at its end.

[0019] Initially, the valve 9 is pressed and closed by the piston spring 3 and the rocker spring 7 to close the outlet end of the inflation channel, that is, the inflation channel is closed; when the inflation equipment is started, the high-pressure gas interface 15 is inflated, and one path of high-pressure gas enters the installation channel and overcomes the force of the piston spring 3 to push the piston 2 to move, and the piston 2 drives the piston rod 4 to move, and the piston rod 4 overcomes the force of the rocker spring 7 to push the rocker arm 8 to swing, thereby applying an opening force to the valve 9, and another path of high-pressure gas enters the injection ring 11 interface and applies an opening force to the valve 9 through the injection ring 11. The two opening forces work together to open the valve 9, that is, the inflation channel is opened, and the high-pressure gas quickly flows into the rescue equipment through the inflation channel; when the high-pressure gas is completely released, on the one hand, the piston spring 3 and the rocker spring 7 provide a reset force for the valve 9, and on the other hand, the high-pressure gas has entered the interior of the rescue equipment. The pressure inside the rescue equipment is higher than that outside, which will generate a reset force on the valve 9. The two reset forces work together to reset the valve 9, that is, the inflation channel is closed.

[0020] The ejector places the injection ring 11 externally, and the injection ring 11 is directly and completely exposed to the high-pressure gas, which can increase the contact area between the high-pressure working gas and the injection ring 11. At the same time, it also increases the contact area with the ejected air, so that the three can better realize energy transfer, drive more air to be inhaled, and achieve a better mixing effect. The ejection ratio is higher than that of other ejectors, and the ejection efficiency is higher. It can meet the requirements of rapid inflation of medium and large rescue equipment, and can greatly reduce the packaging volume and weight of emergency equipment products. It has a very broad application prospect; the ejector adopts a piston assembly and a rocker arm assembly to perform two-stage control of the valve 9, and uses the piston spring 3 and the rocker arm spring 7 to apply force at the same time, and has good one-way sealing.

[0021] like Figures 1 to 3 As shown, in this embodiment, preferably: the ejector body includes a shell 1 and an end seat 12, the mounting channel and the inflation channel are arranged side by side on the shell 1, the high-pressure gas interface 15 and the injection ring 11 interface are arranged on the end seat 12, and the end seat 12 is installed at the entrance of the mounting channel on the shell 1.

[0022] like Figure 1 As shown, in this embodiment, preferably: the piston assembly also includes a sleeve 5, the sleeve 5 is provided with an inner step and an outer flange, the sleeve 5 is threadedly connected to the outlet end of the installation channel and is positioned by the outer flange, the piston spring 3 is sleeved on the piston rod 4, the piston rod 4 is provided with a protrusion, and the two ends of the piston spring 3 are respectively limited by the inner step and the protrusion.

[0023] like Figure 1 As shown, in this embodiment, preferably: the rocker arm 8 is rotatably mounted on the ejector body through the rocker arm fixing seat 6.

[0024] like Figure 1 As shown, in this embodiment, preferably: the rocker arm 8 is connected to the valve 9 by screws.

[0025] like Figure 1 As shown, in this embodiment, preferably: the valve 9 is provided with a sealing ring 10 for sealing on the outlet end of the inflation channel.

[0026] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. An ejector with an external injection ring, characterized in that: The ejector comprises an ejector body, a piston assembly, an ejection ring, a rocker arm assembly and a valve; the ejector body is provided with a high-pressure gas interface, a mounting channel, an ejection ring interface and an inflation channel, and the high-pressure gas interface is communicated with the ejection ring interface and the mounting channel at the same time; the piston assembly is installed in the mounting channel, including a connected piston and piston rod, and a piston spring for driving the piston to reset, the piston is fitted at the inlet end of the mounting channel, and the piston rod extends out of the mounting channel; the ejection ring is located outside the ejector body, just above the inlet end of the inflation channel, connected and communicated with the ejection ring interface, including the corresponding A straight tube and an annular tube are connected and have a nozzle, and the straight tube is placed horizontally in the middle of the annular tube; the rocker arm assembly includes a rocker arm that can be swingably mounted on the ejector body, a rocker arm spring for driving the rocker arm to reset, the rocker arm is hinged to the piston rod and connected to the valve at the end; initially, the valve presses the outlet end of the inflation channel closed under the action of the piston spring and the rocker arm spring. When the high-pressure gas interface is inflated, one path of high-pressure gas overcomes the force of the piston spring and the rocker arm spring to apply an opening force to the valve through the piston assembly and the rocker arm assembly, and the other path of high-pressure gas applies an opening force to the valve through the injection ring.

2. The ejector of the external injection ring according to claim 1, characterized in that: The ejector body includes a shell and an end seat. The mounting channel and the inflation channel are arranged side by side on the shell. The high-pressure gas interface and the injection ring interface are arranged on the end seat. The end seat is installed at the entrance of the mounting channel on the shell.

3. The ejector of the external injection ring according to claim 1, characterized in that: The piston assembly also includes a sleeve, which is provided with an inner step and an outer flange. The sleeve is threadedly connected to the outlet end of the installation channel and is positioned by the outer flange. The piston spring is sleeved on the piston rod, which is provided with a protrusion. The two ends of the piston spring are limited by the inner step and the protrusion respectively.

4. The ejector of the external injection ring according to claim 1, characterized in that: The rocker arm is rotatably mounted on the ejector body through a rocker arm fixing seat.

5. The ejector of the external injection ring according to claim 1, characterized in that: The rocker arm is connected to the valve by screws.

6. The ejector of the external injection ring according to claim 1, characterized in that: The valve is provided with a sealing ring for sealing on the outlet end of the inflation channel.

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