CN218294565U - Pneumatic control duplex large-scale flow amplifier - Google Patents

Abstract

The utility model relates to a large-scale flow amplifier of gas accuse pair, its technical scheme main points are: the method comprises the following steps: the integrated base is used for receiving an input air source, and the first flow amplifier and the second flow amplifier are used for changing the air flow and outputting amplified air flow; the first flow amplifier and the second flow amplifier are both arranged on the integrated base and communicated with the integrated base; the integrated base is provided with at least one first air inlet for inputting a power air source; the first flow amplifier and the second flow amplifier are both provided with a second air inlet for controlling the input of an air source and a first air outlet for amplifying the output of air flow; the first air outlet is communicated with the first air inlet and the second air inlet respectively; the pneumatic duplex control system has the advantage of being capable of achieving the pneumatic duplex control effect of the flow amplifier.

Description

Pneumatic control duplex large-scale flow amplifier

Technical Field

The utility model relates to a flow amplifier technical field, more specifically say, it relates to a big-scale flow amplifier of gas accuse pair.

Background

The air flow amplifier is a pneumatic element widely used in industrial field and working by utilizing the coanda effect, the air flow amplifier can convert low-flow high-pressure compressed air into low-pressure high-flow air flow, a negative pressure effect is generated at the air inlet end of the air flow amplifier, a vacuum low-pressure area is generated, the area has extremely strong vacuum adsorption function, and the air flow amplifier can be used for pneumatically and vacuum-sucking solid particles and oil smoke mist.

Chinese utility model patent with publication number CN216519885U discloses a fast-discharging type flow amplifier, which plays a role in flow amplification and can replace a fast-discharging valve to open and close the valve quickly, however, it is a single-acting valve body, and has a single function, and cannot achieve the effect of controlling the conduction of air flow in the amplifier in a pneumatic manner, thus the improvement is needed.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, the utility model aims to provide a big-scale flow amplifier of gas accuse pair has the advantage that can realize the pneumatic pair control effect of flow amplifier.

The above technical purpose of the present invention can be achieved by the following technical solutions: a pneumatically controlled duplex large flow amplifier comprising: the integrated base is used for receiving an input air source, and the first flow amplifier and the second flow amplifier are used for changing the air flow and outputting amplified air flow; the first flow amplifier and the second flow amplifier are both arranged on the integrated base and are communicated with the integrated base; the integrated base is provided with at least one first air inlet for inputting a power air source; the first flow amplifier and the second flow amplifier are both provided with a second air inlet for controlling the input of an air source and a first air outlet for amplifying the output of air flow; the first air outlet is communicated with the first air inlet and the second air inlet respectively.

Optionally, the first flow amplifier includes: the valve comprises a valve body, an outer protective cover, a sealing mechanism for controlling the on-off of an air path in the valve body, an upper cover mechanism for controlling the input of an air source into the valve body and driving the sealing mechanism, and a slide valve mechanism for tightly propping the sealing mechanism and controlling the on-off of the air path between the valve body and the integrated base; the second air inlet is arranged at the upper end of the upper cover mechanism; the first air outlet is arranged on the valve body; the valve body is arranged on the integrated base and is communicated with the integrated base; one end of the outer protective cover is connected with the valve body, and the other end of the outer protective cover is connected with the upper cover mechanism and forms a cavity through which air flow can pass; the cavity is communicated with the second air inlet and the first air outlet respectively; the sealing mechanism is movably arranged in the cavity; one end of the sealing mechanism is abutted with the upper cover mechanism, and the other end of the sealing mechanism is abutted with the valve body; the slide valve mechanism is arranged in the valve body in a sliding mode; one end of the sliding valve mechanism is abutted with the integrated base, and the other end of the sliding valve mechanism is abutted with the sealing mechanism.

Optionally, an exhaust support frame is arranged on the outer side of the sealing mechanism; one end of the exhaust support frame is abutted to the valve body, and the other end of the exhaust support frame is abutted to the upper cover mechanism.

Optionally, the upper cover mechanism includes: an upper cover body; a first spring and a spring protection sleeve correspondingly matched with the first spring are arranged at the lower end of the upper cover body; the second air inlet is arranged at the upper end of the upper cover body; one end of the spring protection sleeve is sleeved on the first spring, and the other end of the spring protection sleeve is abutted to the sealing mechanism.

Optionally, an adjusting screw capable of controlling the gas pressure in the cavity and an adjusting nut capable of adjusting the working position of the adjusting screw are arranged on the upper cover body; one end of the adjusting nut is in threaded connection with the adjusting screw, and the other end of the adjusting nut is abutted to the upper cover body.

Optionally, the sealing mechanism comprises: the supporting block is used for controlling the on-off of an air passage in the valve body, and the upper diaphragm and the lower diaphragm can buffer the supporting block; the supporting block is movably arranged in the cavity; the upper diaphragm is arranged at the upper end of the supporting block and is abutted against the spring protection sleeve; the lower diaphragm is arranged at the lower end of the supporting block and is respectively abutted to the valve body and the exhaust supporting frame.

Optionally, a positioning hole is formed in the lower end of the supporting block; the positioning hole penetrates through the lower membrane and then abuts against the sliding valve mechanism.

Optionally, the slide valve mechanism comprises: the integrated base comprises a first sealing body, a second sealing body, a supporting column and a second spring, wherein the first sealing body is used for controlling the on-off of a gas path between the valve body and the integrated base, the second sealing body is used for tightly propping against the supporting block, the supporting column is used for driving the first sealing body and the second sealing body to move, and the second spring is used for resetting the supporting column after moving; the supporting column is arranged in the valve body in a sliding mode; the first sealing body is mounted on the support column and is abutted against the valve body; the second sealing body is arranged at the end part of the supporting column and is abutted against the positioning hole; the second spring is sleeved on the supporting column; one end of the second spring is abutted against the first sealing body, and the other end of the second spring is abutted against the integrated base.

Optionally, the first sealing body and the second sealing body are both tapered elastic sealing bodies.

To sum up, the utility model discloses following beneficial effect has:

in the application, two flow amplifiers share one processing base and form a duplex flow amplifier, and the effect of realizing the air flow conduction in the amplifier in a pneumatic control mode can be achieved through a second air inlet on the flow amplifier; the duplex flow amplifier directly adopts the processing channel for ventilation, so that the connecting joint of the two amplifiers can be reduced, the leakage point is reduced, the cost is saved, the duplex flow amplifier can be more conveniently applied to double-acting pneumatic equipment, the connection pipe control of the switching action between the double-acting pneumatic equipment and the double-acting pneumatic equipment is conveniently realized, and the duplex flow amplifier is convenient to install and the trend of pipelines particularly when adopting split control.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic front view of the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is an exploded schematic view of the present invention.

In the figure: 1. an integral base; 21. a first flow amplifier; 22. a second flow amplifier; 3. a first air inlet; 4. a second air inlet; 5. a first air outlet; 61. a valve body; 62. an outer shield; 63. a sealing mechanism; 64. a cover mounting mechanism; 65. a slide valve mechanism; 66. an exhaust support frame; 71. an adjusting screw; 72. adjusting the nut; 81. a supporting block; 82. a lower diaphragm; 91. a first sealing body; 92. a second sealing body; 93. a support pillar; 94. a second spring.

Detailed Description

In order to make the objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature. The terms "vertical," "horizontal," "left," "right," "up," "down," and similar expressions are used for illustrative purposes only and do not indicate or imply that the device or element so referred to must be oriented, constructed and operated in a specific orientation and therefore should not be construed as limiting the invention.

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 4, the utility model provides a large-scale flow amplifier of gas accuse pair, include: the integrated base 1 is used for receiving an input air source, and the first flow amplifier 21 and the second flow amplifier 22 are used for changing the air flow and outputting amplified air flow; the first flow amplifier 21 and the second flow amplifier 22 are both arranged on the integrated base 1 and are communicated with the integrated base 1; the integrated base 1 is provided with at least one first air inlet 3 for inputting a power air source; the first flow amplifier 21 and the second flow amplifier 22 are both provided with a second air inlet 4 for controlling air source input and a first air outlet 5 for amplifying air flow output; the first air outlet 5 communicates with the first air inlet 3 and the second air inlet 4, respectively.

In this embodiment, the first flow amplifier 21 and the second flow amplifier 22 are respectively installed on two sides of the upper end of the integrated base 1, the integrated base 1 is provided with a first air inlet 3 penetrating through the integrated base 1, the first flow amplifier 21 and the second flow amplifier 22 are both provided with first air outlets 5, and the two first air outlets 5 are both communicated with the first air inlet 3, so that after the first air inlet 3 is input into a power air source, air flows with amplified flow can be respectively output from the first air outlets 5 on the first flow amplifier 21 and the second flow amplifier 22; the first flow amplifier 21 and the second flow amplifier 22 are also provided with a second air inlet 4, the second air inlet 4 is communicated with the first air outlet 5, the second air inlet 4 can be used for inputting an external control air source, and after the control air source is input into the flow amplifier, the air flow in the flow amplifier can be adjusted in a pneumatic mode (the principle is the same as that of a pneumatic adjusting valve), so that the pneumatic duplex control effect of the flow amplifier is achieved;

the utility model provides a large-scale flow amplifier of gas accuse pair's theory of operation as follows:

(1) after a power air source is provided at the first air inlet 3, a control air source is input at the second air inlet 4, at the moment, the first air inlet 3 is communicated with the first air outlet 5, and the first air outlet 5 can output airflow with amplified flow; (2) after a power air source is provided at the first air inlet 3, a control air source is cut off at the second air inlet 4, at the moment, the first air inlet 3 is not communicated with the first air outlet 5, the first air outlet 5 does not output air flow, and the air input into the flow amplifier is exhausted from a tiny air outlet on the side wall of the flow amplifier;

because the pneumatic control duplex large-scale flow amplifier of the application shares a processing base and forms a duplex flow amplifier together through two flow amplifiers (the first flow amplifier 21 and the second flow amplifier 22), the duplex flow amplifier directly adopts a processing channel (the first air inlet 3 which is arranged in a penetrating way) to ventilate, so that the connecting joints of the two amplifiers can be reduced, the leakage point is reduced, the cost is saved, the pneumatic control duplex flow amplifier can be more conveniently applied to double-acting pneumatic equipment, the control of connecting pipes for switching actions between the two amplifiers is conveniently realized, and particularly, the installation and the pipeline trend are convenient when the split control is adopted.

Further, the first flow amplifier 21 includes: the valve comprises a valve body 61, an outer protective cover 62, a sealing mechanism 63 for controlling the on-off of an air path in the valve body 61, an upper cover mechanism 64 for controlling the input of an air source into the valve body 61 and driving the sealing mechanism 63, and a slide valve mechanism 65 for tightly propping up the sealing mechanism 63 and controlling the on-off of the air path between the valve body 61 and the integrated base 1; the second air inlet 4 is arranged at the upper end of the upper cover mechanism 64; the first air outlet 5 is arranged on the valve body 61; the valve body 61 is arranged on the integrated base 1 and communicated with the integrated base 1; one end of the outer shield 62 is connected with the valve body 61, and the other end of the outer shield 62 is connected with the upper cover mechanism 64 to form a cavity through which air flow can pass; the cavity is respectively communicated with the second air inlet 4 and the first air outlet 5; the sealing mechanism 63 is movably arranged in the cavity; one end of the sealing mechanism 63 abuts against the upper cover mechanism 64, and the other end of the sealing mechanism 63 abuts against the valve body 61; the slide valve mechanism 65 is slidably disposed in the valve body 61; one end of the slide valve mechanism 65 abuts on the integrated base 1, and the other end of the slide valve mechanism 65 abuts on the seal mechanism 63.

In this embodiment, the outer shield 62 is a gauze-shaped shield, so that a plurality of tiny exhaust ports (the exhaust ports play a role of air leakage) are formed on the end surface of the outer shield 62, when the first air inlet 3 is not communicated with the first air outlet 5, the air in the flow amplifier can be exhausted through the tiny exhaust ports, and the gauze-shaped shield can play a role of noise reduction when exhausting air;

the composition structure and the working principle of the second flow amplifier 22 are completely the same as those of the first flow amplifier 21, wherein the first flow amplifier 21 comprises a valve body 61, an outer shield 62, a sealing mechanism 63, an upper cover mechanism 64 and a slide valve mechanism 65 (see fig. 4), the valve body 61 is installed on the integrated base 1 and is communicated with the integrated base 1, the outer shield 62 and the upper cover mechanism 64 are sequentially connected to the upper end of the valve body 61, the outer shield 62 can form a cavity for air flow to pass through between the valve body 61 and the upper cover mechanism 64 in an enclosing manner, the sealing mechanism 63 is movably arranged in the cavity, the slide valve mechanism 65 is arranged in the valve body 61 in a sliding manner, one end of the slide valve mechanism is abutted against the sealing mechanism 63, and the sealing mechanism 63 can be used for controlling the on-off of an air path in the valve body 61; the specific operation principle of the first flow amplifier 21 in the present application is the same as that of the flow amplifier in the prior art, and is not described herein again.

Further, an exhaust support frame 66 is provided outside the sealing mechanism 63; one end of the exhaust support 66 abuts against the valve body 61, and the other end of the exhaust support 66 abuts against the upper cover mechanism 64.

In the present embodiment, the exhaust support frame 66 is an annular hollow structure, and a plurality of exhaust holes for gas to flow through are circumferentially disposed on the exhaust support frame 66; the exhaust support frame 66 is arranged in the cavity, and two ends of the exhaust support frame 66 are respectively abutted to the valve body 61 and the upper cover mechanism 64, so that the support function between the valve body 61 and the upper cover mechanism 64 can be realized, and the outer protective cover 62 is prevented from being deformed due to the excessive extrusion of the valve body 61 and the upper cover mechanism 64 on the outer protective cover 62.

Further, the cover mechanism 64 includes: an upper cover body; the lower end of the upper cover body is provided with a first spring and a spring protection sleeve correspondingly matched with the first spring; the second air inlet 4 is arranged at the upper end of the upper cover body; one end of the spring protection sleeve is sleeved on the first spring, and the other end of the spring protection sleeve is abutted to the sealing mechanism 63.

In this embodiment, the upper cover body is installed at the upper end of the outer cover 62, the second air inlet 4 is arranged at the upper end of the upper cover body and communicated with the cavity, the lower end of the upper cover body is provided with a first spring and a spring protection sleeve, the first spring is abutted to the upper end of the sealing mechanism 63 under the action of the spring protection sleeve, the sealing mechanism 63 can keep dynamic balance under the combined action of the first spring and the sliding valve mechanism 65, and when the sliding valve mechanism 65 does not tightly abut against the sealing mechanism 63 any more, the sealing mechanism 63 automatically abuts against the exhaust port of the valve body 61 under the elastic action of the first spring and breaks the air path between the valve body 61 and the cavity.

Furthermore, an adjusting screw 71 capable of controlling the air pressure in the cavity and an adjusting nut 72 capable of adjusting the working position of the adjusting screw 71 are arranged on the upper cover body; one end of the adjusting nut 72 is in threaded connection with the adjusting screw 71, and the other end of the adjusting nut 72 is abutted against the upper cover body.

In this embodiment, the adjusting screw 71 is movably disposed on the upper cover body, the adjusting nut 72 is in threaded connection with the adjusting screw 71, the adjusting nut 72 abuts against the upper cover body, and the working position of the adjusting screw 71 can be adjusted by manually rotating the adjusting nut 72; when the first air inlet 3 is communicated with the first air outlet 5, the first air outlet 5 can output airflow after flow amplification, at the moment, the adjusting screw 71 moves up and down to adjust the air pressure in the cavity (the specific principle is the same as that of an adjusting valve in the prior art), and the sealing mechanism 63 can drive the sliding valve mechanism 65 to change the working position by changing the pressure of a control air source acting on the sealing mechanism 63, so that the air inlet flow from the first air inlet 3 to the first air outlet 5 is adjusted, and the effect of changing the equipment action speed of the flow amplifier is further achieved.

Further, the sealing mechanism 63 includes: the valve comprises a supporting block 81 for controlling the on-off of an air passage in the valve body 61, and an upper diaphragm and a lower diaphragm 82 which can buffer the supporting block 81; the supporting block 81 is movably arranged in the cavity; the upper diaphragm is arranged at the upper end of the supporting block 81 and is abutted to the spring protection sleeve; the lower diaphragm 82 is disposed at a lower end of the support block 81 and abuts against the valve body 61 and the exhaust support frame 66, respectively. A positioning hole is formed at the lower end of the supporting block 81; the positioning hole passes through the lower diaphragm and abuts against the slide valve mechanism 65.

In the embodiment, the upper diaphragm is arranged at the upper end of the exhaust support frame 66 and is abutted against the upper end spring protection sleeve, the lower diaphragm 82 is arranged at the lower end of the exhaust support frame 66 and is abutted against the valve body 61, the supporting block 81 is arranged between the upper diaphragm and the lower diaphragm 82, the lower end of the supporting block 81 is provided with a positioning hole, and the positioning hole penetrates through the lower diaphragm 82 and is abutted against the slide valve mechanism 65;

when a control air source is input from the second air inlet 4, the pressure of the control air source acts on the upper diaphragm, the upper diaphragm is stressed and deformed to push the supporting block 81, so that the supporting block 81 pushes the lower diaphragm 82 and drives the sliding valve mechanism 65 to move downwards, the air path between the integrated base 1 and the valve body 61 is communicated at the moment, and a power air source input from the first air inlet 3 can be output from the first air outlet 5 on the valve body 61;

when the pressure of the control air source of the second air inlet 4 becomes small or disappears, the slide valve mechanism 65 can automatically reset under the elastic action, the valve body 61 is sealed again after the slide valve mechanism 65 resets, the air path between the integrated base 1 and the valve body 61 is disconnected at the moment, and the air in the cavity can be exhausted from the tiny air outlet on the outer shield 62.

Further, the spool valve mechanism 65 includes: the integrated base comprises a first sealing body 91 used for controlling the on-off of an air path between the valve body 61 and the integrated base 1, a second sealing body 92 used for tightly propping against the supporting block 81, a supporting column 93 used for driving the first sealing body 91 and the second sealing body 92 to move, and a second spring 94 used for enabling the supporting column 93 to reset after moving; the supporting column 93 is slidably arranged in the valve body 61; the first sealing body 91 is attached to the support column 93 and abuts against the valve body 61; the second sealing body 92 is mounted at the end of the support column 93 and abuts against the positioning hole; the second spring 94 is sleeved on the supporting column 93; one end of the second spring 94 abuts against the first sealing body 91, and the other end of the second spring 94 abuts against the integrated base 1. The first sealing body 91 and the second sealing body 92 are both tapered elastic sealing bodies.

In this embodiment, the first sealing body 91 and the second sealing body 92 are respectively fixed at the middle part and the upper end of the supporting column 93 and are integrally formed, the first sealing body 91 is used for controlling the on-off of an air path between the valve body 61 and the integrated base 1, the second sealing body 92 is used for tightly supporting the supporting block 81 (see fig. 3), and the first sealing body 91 and the second sealing body 92 both adopt conical elastic sealing bodies, so that the conical elastic sealing bodies have better sealing performance and longer service life; the second spring 94 is disposed at the lower end of the first sealing body 91 and is abutted against the integrated base 1, the second spring 94 can be used for resetting the slide valve mechanism 65 after the whole movement, and in the idle state of the device, the second spring 94 can make the first sealing body 91 abutted against the valve body 61 and achieve the effect of disconnecting the air passage between the integrated base 1 and the valve body 61.

The utility model discloses a large-scale flow amplifier of gas accuse pair has the advantage that can realize the pneumatic pair control effect of flow amplifier.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. The utility model provides a large-scale flow amplifier of gas accuse pair which characterized in that includes: the integrated base is used for receiving an input gas source, and the first flow amplifier and the second flow amplifier are used for changing the gas flow and outputting amplified gas flow; the first flow amplifier and the second flow amplifier are both arranged on the integrated base and are communicated with the integrated base;

the integrated base is provided with at least one first air inlet for inputting a power air source; the first flow amplifier and the second flow amplifier are both provided with a second air inlet for controlling the input of an air source and a first air outlet for amplifying the output of air flow; the first air outlet is communicated with the first air inlet and the second air inlet respectively.

2. The pneumatically controlled duplex large flow amplifier of claim 1, wherein the first flow amplifier comprises: the valve comprises a valve body, an outer shield, a sealing mechanism for controlling the on-off of an air path in the valve body, an upper cover mechanism for controlling an air source to be input into the valve body and driving the sealing mechanism, and a slide valve mechanism for tightly propping the sealing mechanism and controlling the on-off of the air path between the valve body and the integrated base;

the second air inlet is arranged at the upper end of the upper cover mechanism; the first air outlet is arranged on the valve body; the valve body is arranged on the integrated base and is communicated with the integrated base; one end of the outer protective cover is connected with the valve body, and the other end of the outer protective cover is connected with the upper cover mechanism and forms a cavity through which air flow can pass; the cavity is communicated with the second air inlet and the first air outlet respectively;

the sealing mechanism is movably arranged in the cavity; one end of the sealing mechanism is abutted with the upper cover mechanism, and the other end of the sealing mechanism is abutted with the valve body; the slide valve mechanism is arranged in the valve body in a sliding mode; one end of the sliding valve mechanism is abutted with the integrated base, and the other end of the sliding valve mechanism is abutted with the sealing mechanism.

3. The large pneumatic control duplex flow amplifier according to claim 2, wherein an exhaust support frame is arranged outside the sealing mechanism; one end of the exhaust support frame is abutted to the valve body, and the other end of the exhaust support frame is abutted to the upper cover mechanism.

4. The large pneumatic-control duplex flow amplifier according to claim 3, wherein the upper cover mechanism comprises: an upper cover body; a first spring and a spring protection sleeve correspondingly matched with the first spring are arranged at the lower end of the upper cover body;

the second air inlet is arranged at the upper end of the upper cover body; one end of the spring protection sleeve is sleeved on the first spring, and the other end of the spring protection sleeve is abutted to the sealing mechanism.

5. The large pneumatic control duplex flow amplifier according to claim 4, wherein an adjusting screw capable of controlling the gas pressure in the cavity and an adjusting nut capable of adjusting the working position of the adjusting screw are arranged on the upper cover body; one end of the adjusting nut is in threaded connection with the adjusting screw, and the other end of the adjusting nut is abutted to the upper cover body.

6. The large pneumatically controlled duplex flow amplifier according to claim 4, wherein the sealing mechanism comprises: the supporting block is used for controlling the on-off of an air passage in the valve body, and the upper diaphragm and the lower diaphragm can buffer the supporting block;

the supporting block is movably arranged in the cavity; the upper diaphragm is arranged at the upper end of the supporting block and is abutted to the spring protection sleeve; the lower diaphragm is arranged at the lower end of the supporting block and is respectively abutted against the valve body and the exhaust supporting frame.

7. The large pneumatic-control duplex flow amplifier according to claim 6, wherein the lower end of the supporting block is provided with a positioning hole; the positioning hole penetrates through the lower membrane and then abuts against the sliding valve mechanism.

8. The pneumatically controlled large-scale duplex flow amplifier according to claim 7, wherein the spool valve mechanism comprises: the integrated base comprises a first sealing body, a second sealing body, a supporting column and a second spring, wherein the first sealing body is used for controlling the on-off of an air path between the valve body and the integrated base, the second sealing body is used for tightly propping against the supporting block, the supporting column is used for driving the first sealing body and the second sealing body to move, and the second spring is used for enabling the supporting column to reset after moving;

the supporting column is arranged in the valve body in a sliding mode; the first sealing body is arranged on the support column and is abutted against the valve body; the second sealing body is arranged at the end part of the supporting column and is abutted against the positioning hole; the second spring is sleeved on the supporting column; one end of the second spring is abutted against the first sealing body, and the other end of the second spring is abutted against the integrated base.

9. The large pneumatic control duplex flow amplifier according to claim 8, wherein the first sealing body and the second sealing body are both conical elastic sealing bodies.

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