CN217472597U

CN217472597U - Bypass air supply knob structure for air supply valve

Info

Publication number: CN217472597U
Application number: CN202220320833.6U
Authority: CN
Inventors: 徐海峰; 肖小林
Original assignee: Meidashun Nanjing Safety Technology Co ltd
Current assignee: Meidashun Nanjing Safety Technology Co ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-09-23
Anticipated expiration: 2032-02-17

Abstract

The embodiment of the utility model discloses bypass air feed knob structure for air feed valve relates to emergency rescue equipment technical field, can prevent that the air feed valve breaks down, ensures user's safety. The utility model discloses a: in the air supply valve 1, an inner knob 2 is inserted into an inner cavity 6 of an air inlet shaft 3, an air inlet 4 is formed in the air inlet shaft 3, the air inlet 4 is connected with an air inlet pipe 5, and air flow flows into the inner cavity 6 through the air inlet pipe 5; the tail end of the air inlet shaft 3 is provided with an inner shaft 8 and a spring 9, the top end of the inner shaft 8 is provided with a piston head 10, one end of the spring 9 is fixedly connected with the bottom end of the inner shaft 8, the other end of the spring 9 is fixedly connected with the inner wall of the air supply valve 1, and the spring 9 applies elasticity to the inner shaft 8; the first thread 12 and the second thread 13 are matched to form a threaded connection; one end of the inner knob 2 faces the inner shaft 8 and the other end of the inner knob 2 is fitted with an outer knob 7.

Description

Bypass air supply knob structure for air supply valve

Technical Field

The utility model relates to an emergency rescue equipment technical field especially relates to a bypass air feed knob structure for air feed valve.

Background

In various emergency rescue equipment used at present, personal protection equipment for rescuers is important in relation to life safety and rescue efficiency of rescuers. Therefore, various improvements to the PPE are continuously performed in order to further improve the rescue efficiency and safety of rescuers.

Among them, how to effectively connect the air supply valve with the mask so that the air path between the air supply valve and the mask is unblocked is a technical point which needs to be continuously researched and perfected. As shown in fig. 1 and 2, in the normal working process of the air supply valve (0-0), when a user inhales air, the air pressure inside the air supply valve membrane (0-5) is reduced, the cover spring (0-3) presses down the air supply valve membrane (0-5), the air supply valve membrane (0-5) applies force to the number 1 (0-1) of the spindle, the number 1 (0-1) of the spindle applies force to the number 2 (0-2) of the spindle, the number 2 (0-2) of the spindle applies force to the internal spindle (0-4) of the classical structure, the internal spindle (0-4) of the classical structure moves backwards, air flow in the air bottle gushes out to supplement air in the mask, and when the internal air and the external air are balanced, the internal spindle spring (0-8) re-ejects the internal spindle (0-4) of the classical structure to seal the air inlet. The normal operation of the air supply valve (0-0) is formed by the repeated action. However, as shown in fig. 3, when a user needs to forcibly supply air (0-such as when the user needs to have an atmosphere flow to wash a face screen or other needs), a relatively large number of solutions are currently used in the market, in which a button (0-7) is added on an air supply valve cover (0-6), the user needs to press the button to push a cover spring (0-3), the spring pushes an air supply valve diaphragm (0-5), the air supply valve diaphragm (0-5) applies force to a spindle 1 (0-1), the spindle 1 (0-1) applies force to a spindle 2 (0-2), the spindle 2 (0-2) applies force to a spindle (0-4) inside a classical structure, the spindle (0-4) inside the classical structure moves backwards, and the air cylinder flows in.

However, the advantages of this implementation are: the novel die is formed by assembling a plurality of scattered components, the cost of the components is low, the processing and the assembly are convenient, the replacement and the maintenance are convenient, the rapid production is easy to realize by purchasing the existing parts on the market, and the die does not need to be opened again basically to customize special parts. There are at least two drawbacks: if the rotating shaft is blocked, the inner shaft of the classic structure can not be pushed even if the air supply valve diaphragm is pushed; when forced air supply is needed, a user is required to press the button all the time, and other operations of the user are affected. In an emergency rescue scene, the two defects seriously threaten the operation state of rescue workers and reduce the safety.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a bypass air feed knob structure for air feed valve can prevent the air feed valve trouble, ensures user's safety.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

in the air supply valve (1), an inner knob (2) is inserted into an inner cavity (6) of an air inlet shaft (3), the air inlet shaft (3) is provided with an air inlet (4), the air inlet (4) is connected with an air inlet pipe (5), and air flow flows into the inner cavity (6) through the air inlet pipe (5);

the tail end of the air inlet shaft (3) is provided with an inner shaft (8) and an elastic element (9), the top end of the inner shaft (8) is provided with a piston head (10), one end of the elastic element (9) is fixedly connected to the bottom end of the inner shaft (8), the other end of the elastic element (9) is fixedly connected to the inner wall of the air supply valve (1), and the elastic element (9) applies elasticity to the inner shaft (8);

a first thread (12) is processed on the inner wall of the air inlet shaft (3), a second thread (13) is processed on the outer wall of the inner knob, and the first thread (12) is matched with the second thread (13) to form threaded connection;

one end of the inner knob (2) faces the inner shaft (8), and the other end of the inner knob (2) is provided with the outer knob (7).

The embodiment of the utility model provides a bypass air feed knob structure for air feed valve can prevent the air feed valve and break down, and air feeder forces the air feed, ensures user's safety when can not work (for example the air inlet valve blocks and can not open). When the knob is opened, the forced air supply mode is opened, the user does not need to operate all the time, and when the function is not needed, the knob is closed, so that the operation is simpler.

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 these drawings without creative efforts.

FIGS. 1-3 are schematic structural diagrams of solutions provided in the prior art;

fig. 4-6 are schematic diagrams of the overall structure provided by the embodiment of the present invention;

fig. 7-9 are specific schematic diagrams of partial structures provided by embodiments of the present invention;

the air supply device comprises an air supply valve (1), an inner knob (2), an air inlet shaft (3), an air inlet (4), an air inlet pipe (5), an inner cavity (6), an outer knob (7), an inner shaft (8), a piston head (10), an elastic element (9), an inner cavity air outlet (11) of the air inlet shaft (3), first threads (12), second threads (13), a toothed clamping groove (14), a boss (15), a check ring (16), an annular groove (17) and an elastic sealing material (18).

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, 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 the 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 by referring to the drawings are exemplary only for explaining the present invention, and should not 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.

In present scheme, the air supply valve is in normal working process, the user is at the in-process of breathing in, the inside atmospheric pressure of air supply valve diaphragm reduces, the shroud spring pushes down the air supply valve diaphragm, the air supply valve diaphragm is to pivot 1 application of force, pivot 1 is to pivot 2 application of force, pivot 2 is to the inside axle application of force, inside axial rear removes, the air current is gushed in the gas cylinder, supply the interior gas of face guard, after interior outer gas balance, the inside axle spring is with inside axle ejecting again, seal the air inlet. The normal operation of the air supply valve is formed by the repeated action. Such as shown in fig. 1 and 2, when the user needs forced air supply (which may be a flow of air to flush the panel or other requirement). At present, the scheme that the market uses more is to increase a button on the shroud, as shown in figure 3, need the user to press the button and promote the shroud spring, the spring promotes the air feed valve diaphragm, and the air feed valve diaphragm is to pivot 1 application of force, and pivot 1 is to pivot 2 application of force, and pivot 2 is to the internal shaft application of force, and inside axial rear removes, and the interior air current of gas cylinder is gushed into. These prior solutions have several drawbacks: 1. if the rotating shaft is stuck, the inner shaft may not be pushed even if the air supply valve diaphragm is pushed; 2. when forced air supply is needed, a user is required to press the button all the time, and other operations of the user are affected.

The embodiment of the utility model provides a bypass air feed knob structure for air feed valve, as shown in fig. 4, 7, include:

in the inside of air supply valve (1), inner knob (2) inserts inner chamber (6) of air inlet axle (3), has seted up air inlet (4) on air inlet axle (3), and intake pipe (5) are connected in air inlet (4), and the air current flows in inner chamber (6) through intake pipe (5).

An inner shaft (8) and an elastic element (9) are installed at the tail end of the air inlet shaft (3), a piston head (10) is installed at the top end of the inner shaft (8), one end of the elastic element (9) is fixedly connected to the bottom end of the inner shaft (8), the other end of the elastic element (9) is fixedly connected to the inner wall of the air supply valve (1), and the elastic element (9) applies elastic force to the inner shaft (8). The elastic element (9) can be a component capable of providing elastic force, such as a spring, a metal elastic sheet and the like.

A first thread (12) is processed on the inner wall of the air inlet shaft (3), a second thread (13) is processed on the outer wall of the inner knob, and the first thread (12) and the second thread (13) are matched to form threaded connection.

In this embodiment, the inner knob can be used to push the inner shaft to open the air inlet, so that the air flows into the air breathing bottle. When the air supply valve (1) is in a closed state, the piston head (10) is blocked on the air outlet (11) of the inner cavity of the air inlet shaft (3) by applying elastic force to the inner shaft (8) through the elastic element (9). For example: as shown in figure 5, when the knob is in the closed state, the inner knob is not in contact with the inner shaft, the inner spring is pressed against the inner shaft, the air flow does not pass through, and the opening and closing of the inner shaft can be adjusted only by the self-operation of the air supply valve.

When the air supply valve (1) is in an open state, one end, facing the inner shaft (8), of the inner knob (2) contacts the piston head (10) and pushes the piston head (10) open, and the piston head (10) is separated from the inner cavity air outlet (11). For example: as shown in figure 6, when the knob is in the open state, the inner knob jacks the inner shaft, and forced air supply is carried out, and the condition is suitable for increasing the air supply quantity when forced air supply is needed.

Further, as shown in fig. 4, the lumen exit port (11) is circular and forms a flange around the circumference. The piston head (10) is provided with an annular groove (17), and the shape and the size of the annular groove (17) are matched with the flange of the air outlet (11) of the inner cavity. When the air supply valve (1) is in a closed state, the flange of the inner cavity air outlet (11) is tightly attached to the annular groove (17).

In a preferred embodiment, the annular groove (17) may be filled with an elastic sealing material (18). When the air supply valve (1) is in a closed state, the flange of the inner cavity air outlet (11) is tightly attached to the elastic sealing material (18) filled in the annular groove (17), so that the air tightness is improved.

In this embodiment, as shown in fig. 7 and 8, the cross section of the inner part of the outer knob (7) is circular, and a toothed slot (14) is machined along the circumference of the circle. The other end of the inner knob (2) is cylindrical, clamping teeth matched with the toothed clamping grooves (14) are machined along the circumference of the cylinder, and the outer knob (7) is installed at the other end of the inner knob (2) through the toothed clamping grooves (14) and the clamping teeth on the other end of the inner knob (2).

Further, as shown in fig. 8, a retainer ring (16) is provided at the front end of the intake shaft (3), and a boss (15) is provided inside the outer knob (7). The diameter of the inner side of the outer knob (7) is larger than the diameter of the cross section of the air inlet shaft (3), and the diameter of the inner side of the outer knob (7) minus the height of the boss (15) is smaller than the diameter of the cross section of the air inlet shaft (3). Through the radial fixed of cusp draw-in groove between outer knob and the interior knob, through threaded connection between interior knob and the axle that admits air, can drive interior knob when rotating outside knob cap and rotate, then interior knob can carry out axial motion along the epaxial screw thread that admits air.

As shown in fig. 9, when the outer knob (7) is mounted on the other end of the inner knob (2), it covers both the other end of the inner knob (2) and the retainer ring (16) of the intake shaft (3). The inside boss that sets up of outer knob, the epaxial retaining ring that sets up of admitting air, under the prerequisite of fixed axle of admitting air, the turned angle control of outside knob cap is at certain angle.

In the scheme of this embodiment, can prevent that the air feed valve breaks down, when air inlet unit can not work (for example the air feed valve blocks and can not be opened), carry out the forced air feed, ensure user's safety. When the knob is turned on, the forced air supply mode is turned on, the operation of a user is not required all the time, and when the function is not required, the knob is turned off, so that the operation is simpler.

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 protection 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 should be covered by the protection 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 bypass air feed knob structure for an air supply valve, comprising:

the tail end of the air inlet shaft (3) is provided with an inner shaft (8) and an elastic element (9), and the top end of the inner shaft (8) is provided with a piston head (10);

a first thread (12) is processed on the inner wall of the air inlet shaft (3), a second thread (13) is processed on the outer wall of the inner knob, and the first thread (12) and the second thread (13) are matched to form threaded connection;

2. The bypass air feed knob structure for an air feed valve according to claim 1, wherein when the air feed valve (1) is in a closed state, the piston head (10) is blocked on the inner cavity air outlet (11) of the air feed shaft (3) by applying elastic force to the inner shaft (8) through the elastic element (9);

when the air supply valve (1) is in an open state, one end, facing the inner shaft (8), of the inner knob (2) contacts the piston head (10) and pushes the piston head (10) open, and the piston head (10) is separated from the inner cavity air outlet (11).

3. The bypass air feed knob structure for an air feed valve according to claim 1, wherein the inner chamber air outlet port (11) is circular and forms a flange around the circumference;

the piston head (10) is provided with an annular groove (17), and the shape and the size of the annular groove (17) are matched with the flange of the air outlet (11) of the inner cavity;

when the air supply valve (1) is in a closed state, the flange of the inner cavity air outlet (11) is tightly attached to the annular groove (17).

4. The bypass air feed knob structure for an air feed valve according to claim 1,

the annular groove (17) is filled with an elastic sealing material (18);

when the air supply valve (1) is in a closed state, the flange of the inner cavity air outlet (11) is tightly attached to the elastic sealing material (18) filled in the annular groove (17).

5. The bypass air feed knob structure for an air feed valve according to claim 1, wherein the cross section of the inside of the outer knob (7) is circular, and a toothed catching groove (14) is processed along the circumference of the circle;

the other end of the inner knob (2) is cylindrical, clamping teeth matched with the toothed clamping grooves (14) are machined along the circumference of the cylinder, and the outer knob (7) is installed at the other end of the inner knob (2) through the toothed clamping grooves (14) and the clamping teeth on the other end of the inner knob (2).

6. The bypass air feed knob structure for an air feed valve according to claim 1 or 5, wherein a retainer ring (16) is provided at the front end of the air feed shaft (3), and a boss (15) is provided inside the outer knob (7);

the diameter of the inner side of the outer knob (7) is larger than the diameter of the cross section of the air inlet shaft (3), and the diameter of the inner side of the outer knob (7) minus the height of the boss (15) is smaller than the diameter of the cross section of the air inlet shaft (3).

7. The bypass air feed knob structure for an air feed valve according to claim 6, wherein the outer knob (7) covers both the other end of the inner knob (2) and the retainer ring (16) of the air feed shaft (3) when mounted to the other end of the inner knob (2).