CN216676757U

CN216676757U - Valve body switch control structure

Info

Publication number: CN216676757U
Application number: CN202121144657.7U
Authority: CN
Inventors: 苏亚兵; 汤凯
Original assignee: Changte Nanjing Safety Technology Co ltd
Current assignee: Changte Nanjing Safety Technology Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-06-07
Anticipated expiration: 2031-05-26

Abstract

The embodiment of the utility model discloses a valve body switch control structure, relates to the technical field of fire fighting equipment, and can control the valve body switch through a motor so as to be convenient for switching with other air supply modes. The utility model comprises the following steps: a second shaft (9) extends out of the air valve rear cover (1), the second shaft (9) is inserted into a hole in the side face of a limiting block (13), a boss middle hole (12-2) is arranged on a rotating shaft of a motor (11), and a boss (12) penetrates through a boss fixing hole (12-3) by a pin to be fixed and clamped on the rotating shaft of the motor (11), so that the boss rotating shaft (12-1) can move along the longitudinal position of the limiting block middle hole (13-1) formed in the limiting block (13). The utility model is suitable for the electric control valve body switch.

Description

Valve body switch control structure

Technical Field

The utility model relates to the technical field of fire fighting equipment, in particular to a valve body switch control structure.

Background

Self-contained positive pressure air respirator (self-contained breathing apparatus) is widely used in fire fighting, chemical engineering, ships, petroleum, smelting, factories and mines, laboratories and the like as safety protection equipment. The actual conditions of the firemen when using the SCBA to operate in a disaster accident site are complex, various operation forms are alternated, the same firemen often engages in various operation forms such as reconnaissance, forcible entry, saving people and extinguishing fire, the site conditions are different, and when wearing the SCBA to perform respiratory protection, the reliability of the air valve becomes an important problem, so that how to further optimize the valve body structure becomes the direction needing to be researched.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a valve body switch control structure, which can control the valve body switch through a motor so as to be convenient for switching with other air supply modes.

In order to achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:

the air valve rear cover 1 is arranged on the shell 2, a driving assembly is arranged in a cavity formed by the air valve rear cover 1 and the shell 2, the driving assembly is connected with the first membrane 1-5 and is coupled to the cylinder 5, the driving assembly is used for responding to pressure change in the second cavity to drive a piston in the cylinder 5 to be jointed with or away from the sealing piece 6, and the driving assembly comprises a first lever 1-1, a second lever 1-2, a membrane support frame 1-3 and a membrane support frame support assembly 1-4; a second shaft 9 extends out of the position of a button 1-6 of a shell 2, namely the side of a membrane support frame supporting component 1-4, the second shaft 9 is inserted into a hole in the side face of a limiting block 13, a boss middle hole 12-2 is arranged on a rotating shaft of a motor 11, and a boss 12 penetrates through a boss fixing hole 12-3 by a pin to be installed and clamped on the rotating shaft of the motor 11, so that the boss rotating shaft 12-1 can move along the longitudinal position of the limiting block middle hole 13-1 formed in the limiting block 13.

A limiting block middle hole 13-1 is formed in the middle of the limiting block 13, a hole is formed in the side face of the limiting block 13 and is matched with the second shaft 9, the second shaft 9 is inserted into the hole, and then the limiting block middle hole 13-1 of the limiting block 13 is arranged on the boss rotating shaft 12-1.

The rotating shaft of the motor 11 rotates clockwise, the second shaft 9 is pushed to push the T-shaped plastic structural part 1-4-2 to rotate along the first shaft 1-4-1, and then the T-shaped plastic structural part is clamped on the clamping part 1-4-3; the upper part of the T-shaped plastic structural part 1-4-2 rotates towards the air valve rear cover to push against the membrane supporting frame 1-3, and then the first membrane 1-5 is supported, so that the second membrane 5-2 is connected with the sealing part 6, and the gas blocking the gas cylinder cannot enter the cavity of the valve body.

The rotating shaft of the motor 11 rotates anticlockwise, the second shaft 9 is pulled, the thrust on the T-shaped plastic structural part 1-4-2 is cancelled, when a user inhales air, the first diaphragm 1-5 exerts pressure on the first lever 1-1, the first lever 1-1 pushes the second lever 1-2, the second lever 1-2 drives the second diaphragm 5-2 to be far away from the sealing part 6, and air in the air bottle enters the cavity of the valve body.

In the valve body switch control structure provided by the embodiment of the utility model, if the rotating shaft of the motor 11 rotates clockwise, the second shaft 9 is pushed to push the T-shaped plastic structural part 1-4-2 to rotate along the first shaft 1-4-1 and further to be clamped in the clamping part 1-4-3, the upper part of the T-shaped plastic structural part 1-4-2 can rotate towards the air valve rear cover and can abut against the membrane supporting frame 1-3, and further the first membrane 1-5 is supported, so that the second membrane 5-2 is jointed with the sealing part 6, further the air of the air bottle can not enter, no matter how a user breathes, the air of the air bottle can not enter, the second shaft 9 is limited and can not move, therefore, the T-shaped plastic structural part 1-4-2 can not move, and therefore, the pressure can not be applied to the first lever 1-1 even if the user breathes in the first membrane 1-5, the first lever 1-1 can not push the second lever 1-2, and the second lever 1-2 can not drive the second diaphragm 5-2 to be far away from the sealing element 6, i.e. the gas of the gas cylinder can not be used.

If the rotating shaft of the motor 11 rotates anticlockwise, the second shaft 9 is pulled, the thrust on the T-shaped plastic structural part 1-4-2 is cancelled, a user inhales air to enable the first diaphragm 1-5 to exert pressure on the first lever 1-1, the first lever 1-1 pushes the second lever 1-2, the second lever 1-2 drives the second diaphragm 5-2 to be far away from the sealing part 6, the gas in the gas cylinder enters the cavity of the valve body, when the pressure in the second cavity 4 is increased, namely, after the gas in the gas cylinder enters the second cavity, the first diaphragm 1-5 moves towards the gas valve rear cover 1, i.e. upward, so that the force applied to the second lever 1-2 is removed and the second piston is returned to its original position by the biasing element, so that the second diaphragm 5-2 engages the seal 6.

The automatic and rapid opening and closing of the air supply valve is realized through the motor, and the air supply valve can be used in a respiratory protection system with multiple air supply modes, such as a self-contained positive pressure air respirator (SCBA), so as to be convenient for switching with other air supply modes.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of the overall structure of a valve body structure provided in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a valve body structure provided in accordance with an embodiment of the present invention without a bypass device;

FIG. 3 is a cross-sectional view of a by-pass device with a valve body structure according to an embodiment of the present invention;

FIG. 4 is an exploded cross-sectional view of a drive assembly of the valve body structure provided by an embodiment of the present invention;

fig. 5 and 6 are schematic perspective views of the driving assembly of the valve body structure provided by the embodiment of the utility model;

FIG. 7 is a schematic diagram of a contact manner of a first lever and a second lever of a valve body structure provided by an embodiment of the utility model;

FIG. 8 is a schematic diagram of a diaphragm support bracket assembly for an air valve according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a diaphragm support bracket assembly for an air valve capable of supporting a diaphragm in accordance with an embodiment of the present invention;

FIG. 10 is a general schematic view of a control valve body switch provided in accordance with an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a control valve switch provided in an embodiment of the present invention;

12-14 are schematic views of boss structures in the structure of a switch of a control valve body provided by an embodiment of the utility model;

fig. 15 is a schematic structural diagram of a limiting block in a structure of a control valve switch provided in an embodiment of the present invention.

Wherein each reference numeral respectively denotes: 1 air valve rear cover, 1-1 first lever, 1-1-1 first section, 1-1-2 bending, 1-2 second lever, 1-2-1 second section, 1-2-2 cushion pad, 1-3 diaphragm support frame, 1-4 diaphragm support frame support component, 1-4-1 first shaft, 1-4-2T-shaped plastic structural component, 1-4-3 clamping component, 1-5 first diaphragm, 1-6 button, 2 shell, 3 first cavity, 3-1 air source inlet, 4 second cavity, 4-1 air source outlet, 5 cylinder body, 5-1 first end, 5-2 second diaphragm, 5-3 through hole, 5-4 reset spring, 5-5 second end, 5-6 cylinder body shell, The device comprises a sealing element 6, a bypass shell 7, a rotary hand wheel 7-1, a bypass outlet 7-2, a push rod 7-3, a first end of the push rod 7-4, a medium-pressure air pipe 8, a second shaft 9, an elastic element 10, a motor 11, a boss 12, a boss rotating shaft 12-1, a boss center hole 12-2, a boss fixing hole 12-3, a limiting block 13 and a limiting block center hole 1-3-1.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will be understood by those skilled in the art that, unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

An embodiment of the present invention provides a structure for controlling opening and closing of a valve body as shown in fig. 10, wherein the components of the valve body structure as shown in fig. 1 to 9 include:

the air valve rear cover 1 is installed on the shell 2, a driving assembly is installed in a cavity formed by the air valve rear cover 1 and the shell 2, the driving assembly is connected with the first membrane 1-5 and is coupled to the cylinder body 5, the first membrane 1-5 is clamped with the membrane support frame 1-3, the membrane support frame 1-3 is clamped in a groove of the cylinder body shell 5-6, and the membrane support frame support assembly 1-4 is used for supporting the membrane support frame 1-3 so as to support the first membrane. As shown in fig. 8-9, the membrane support frame supporting assembly 1-4 comprises a first shaft 1-4-1 and a plastic structural member, the plastic structural member is T-shaped, and the plastic structural member passes through the first shaft 1-4-1, the buttons 1-6 on both sides of the housing are pressed to drive the second shaft 9 to push the T-shaped plastic structural member 1-4-2 to rotate along the first shaft 1-4-1 and further to be clamped on the clamping member 1-4-3, the upper portion of the T-shaped plastic structural member 1-4-2 can rotate towards the rear cover of the air valve to abut against the membrane support frame 1-3, so as to support the first membrane 1-5, when the air supply valve is not needed, the button 1-6 can be pressed to support the first membrane 1-5, so that the second membrane 5-2 is engaged with the sealing member 6, the air leakage phenomenon is avoided.

The air source device comprises a first cavity 3 and a second cavity 4 which are formed in a shell 2, wherein the first cavity 3 is communicated with an air source inlet 3-1, the second cavity 4 is communicated with an air source outlet 4-1, and a medium-pressure air pipe 8 is connected with the air source inlet 3-1.

The cylinder body 5 is arranged between the first cavity 3 and the second cavity 4, one end of the cylinder body 5 close to the first cavity 3 is a first end 5-1, one end of the cylinder body 5 close to the second cavity 4 is a second end 5-5, the first end 5-1 is communicated with the second end 5-5 through a through hole 5-3, the second diaphragm 5-2 is arranged at the first end 5-1, and the return spring 5-4 is arranged at the second end 5-5.

In the present embodiment, as shown in fig. 4 and 7, the first lever 1-1 and the second lever 1-2 are made of steel wire. Specifically, as shown in fig. 7, the first lever 1-1 is a rectangular frame made of steel wires, the long sides and the wide sides of the rectangular frame are all straight lines, 6 corners of the rectangular frame are circular arcs, and the rectangular frame is bent at a designated position of the long side of the rectangular frame, and the bent rectangular frame is L-shaped, generally forming 6 side frames including a first section and a second section; a cushion pad is sleeved on the wide edge of the second section; the long side of the second section is in contact with the second lever 1-2. Pushing the second lever by the first lever may effect the second diaphragm engaging or moving away from the seal.

In this embodiment, as shown in fig. 3, the bypass housing 7 is coupled to the first chamber 3, the rotating handwheel 7-1 is installed outside the bypass housing 7, and the bypass outlet 7-2 is butted with the first chamber 3; the push rod 7-3 extends through the bypass outlet 7-2 and the push rod first end 7-4 contacts the first end 5-1. In this embodiment, the first membrane 1-5 is clamped with the membrane support frame 1-3, the membrane support frame 1-3 is clamped at the groove of the cylinder body shell 5-6, and the membrane support frame support assembly 1-4 is used for supporting the membrane support frame 1-3, so as to support the first membrane. The membrane support frame 1-3 and the membrane support frame support component 1-4 are made of plastics. In a preferred version of this embodiment, the wire diameter of the drive assembly is 1.3 mm.

The driving assembly is used for driving the piston comprising the second diaphragm 5-2 in the cylinder 5 to be connected with or away from the sealing member 6 in response to the pressure change in the second chamber, in practical application, when the pressure of the second chamber 4 is reduced due to inhalation of a user, the first diaphragm 1-5 moves downwards away from the gas valve rear cover 1, so as to apply pressure to the first lever 1-1, the first lever 1-1 pushes the second lever 1-2, the second lever 1-2 drives the second diaphragm 5-2 to move away from the sealing member 6, when the pressure in the second chamber 4 is increased, namely gas in the gas cylinder enters the second chamber, the first diaphragm 1-5 moves towards the gas valve rear cover 1, namely moves upwards, so that the force applied to the first lever 1-2 is removed, and the second piston returns to the original position under the action of the biasing element, thereby causing the second membrane 5-2 to engage the seal 6. The driving assembly comprises a first lever 1-1, a second lever 1-2, a membrane support frame 1-3 and a membrane support frame support assembly 1-4.

Referring to fig. 10-15, the boss central hole 12-2 is disposed on the shaft of the motor 11, and the boss 12 is fixed by a pin passing through the boss fixing hole 12-3 and clamped on the shaft of the motor 11.

A limiting block middle hole 13-1 is formed in the middle of a limiting block 13, a hole formed in the side face of the limiting block 13 is matched with a second shaft 9, the second shaft 9 can be inserted into the limiting block middle hole 13-1, the limiting block middle hole 13-1 of the limiting block 13 is placed on a boss rotating shaft 12-1, the rotating shaft of a motor 11 rotates, and then the boss 12 tends to rotate when being subjected to rotating force of the rotating shaft of the motor 11, but due to the limiting effect of the limiting block 13, the boss rotating shaft 12-1 can only move along the longitudinal position of the limiting block middle hole 13-1, meanwhile, the limiting block 13 is subjected to pulling force of the boss rotating shaft 12-1, wherein the rotating shaft of the motor 11 rotates anticlockwise to pull the second shaft 9, or the rotating shaft of the motor 11 rotates clockwise to push the second shaft 9.

If the rotating shaft of the motor 11 rotates clockwise, the second shaft 9 is pushed to push the T-shaped plastic structural part 1-4-2 to rotate along the first shaft 1-4-1 and further to be clamped on the clamping part 1-4-3, the upper part of the T-shaped plastic structural part 1-4-2 can rotate towards the air valve rear cover and can abut against the membrane supporting frame 1-3, and further the first membrane 1-5 is supported, so that the second membrane 5-2 is jointed with the sealing part 6, and further air of the air bottle can not enter, no matter how a user breathes, air of the air bottle can not enter, because the second shaft 9 is limited and can not move, the T-shaped plastic structural part 1-4-2 can not move, and therefore, even if the user breathes in the first membrane 1-5, the pressure can not be applied to the first lever 1-1, the first lever 1-1 can not push the second lever 1-2, and the second lever 1-2 can not drive the second diaphragm 5-2 to be far away from the sealing element 6, i.e. the gas of the gas cylinder can not be used.

In the present embodiment, the start and stop of the motor 11 are implemented by a control circuit, which mainly implements automatic opening and closing of an air supply valve, such as can be used in a respiratory protection system with multiple air supply modes, and used in a self-contained positive pressure air breathing apparatus (SCBA) to facilitate switching with other air supply modes.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A valve body on-off control structure, comprising:

the air valve rear cover (1) is arranged on the shell (2), a driving assembly is arranged in a cavity formed by the air valve rear cover (1) and the shell (2), the driving assembly is connected with the first membrane (1-5) and coupled to the cylinder body (5), the driving assembly is used for responding to pressure variation in the second cavity to drive a piston in the cylinder body (5) to be jointed with or away from the sealing piece (6), and the driving assembly comprises a first lever (1-1), a second lever (1-2), a membrane supporting frame (1-3) and a membrane supporting frame supporting assembly (1-4);

a second shaft (9) extends out of a position of a button (1-6) of a shell (2), the second shaft (9) is inserted into a side surface of a limiting block (13) to form a hole, a boss middle hole (12-2) is arranged on a rotating shaft of a motor (11), and a boss (12) penetrates through a boss fixing hole (12-3) by a pin to be installed and clamped on the rotating shaft of the motor (11), so that the boss rotating shaft (12-1) can move along the longitudinal position of the limiting block middle hole (13-1) formed in the limiting block (13).

2. The valve body switch control structure according to claim 1, characterized in that a stopper center hole (13-1) is formed in the middle of the stopper (13), a hole formed in the side surface of the stopper (13) is matched with the second shaft (9), the second shaft (9) is inserted into the hole, and then the stopper center hole (13-1) of the stopper (13) is placed on the boss rotating shaft (12-1).

3. The valve body on-off control structure according to claim 1 or 2,

the rotating shaft of the motor (11) rotates clockwise, the second shaft (9) is pushed to push the T-shaped plastic structural part (1-4-2) to rotate along the first shaft (1-4-1), and then the T-shaped plastic structural part is clamped on the clamping part (1-4-3);

the upper part of the T-shaped plastic structural part (1-4-2) rotates towards the rear cover of the air valve to push against the diaphragm support frame (1-3), and then the first diaphragm (1-5) is supported, so that the second diaphragm (5-2) is connected with the sealing part (6), and the gas blocking the gas cylinder cannot enter the cavity of the valve body.

4. The valve body on-off control structure according to claim 1 or 2,

the rotating shaft of the motor (11) rotates anticlockwise, the second shaft (9) is pulled, the thrust on the T-shaped plastic structural part (1-4-2) is cancelled, when a user inhales, the first diaphragm (1-5) exerts pressure on the first lever (1-1), the first lever (1-1) pushes the second lever (1-2), the second lever (1-2) drives the second diaphragm (5-2) to be far away from the sealing part (6), and the gas of the gas cylinder enters the cavity of the valve body.

5. A valve body switch control structure according to claim 1, characterized in that a first chamber (3) and a second chamber (4) are formed inside the housing (2), the first chamber (3) is communicated with the air source inlet (3-1), the second chamber (4) is communicated with the air source outlet (4-1), and the medium-pressure air pipe (8) is connected to the air source inlet (3-1);

the cylinder body (5) is installed between the first cavity (3) and the second cavity (4), one end, close to the first cavity (3), of the cylinder body (5) is a first end (5-1), one end, close to the second cavity (4), of the cylinder body (5) is a second end (5-5), the first end (5-1) is communicated with the second end (5-5) through a through hole (5-3), the second diaphragm (5-2) is installed at the first end (5-1), and the reset spring (5-4) is installed at the second end (5-5).

6. A valve body switching control structure according to claim 1, wherein the first lever (1-1) and the second lever (1-2) are made of a steel wire;

the first lever (1-1) is a rectangular frame made of steel wires, the long edge and the wide edge of the rectangular frame are both straight lines and are bent at the designated position of the long edge of the rectangular frame, and the bent rectangular frame is L-shaped and comprises a first section and a second section;

a cushion pad is sleeved on the wide edge of the second section;

the long side of the second section is in contact with a second lever (1-2).

7. The valve body switch control structure according to claim 1, wherein the first membrane (1-5) is clamped with the membrane support frame (1-3), and the membrane support frame (1-3) is clamped in a groove of the cylinder body shell (5-6);

the membrane support frame supporting component (1-4) is used for supporting the membrane support frame (1-3);

the membrane support frame supporting assembly (1-4) is composed of a steel wire and a plastic structural member, the plastic structural member is T-shaped, penetrates through the steel wire and is used for pressing a button (1-6) on the shell and driving the steel wire to rotate, and the steel wire further drives the plastic structural member to rotate.