Gas pressure reducer

Abstract

The invention discloses a gas pressure reducer which comprises a shell and a shell head arranged at the end of the shell, a gas outlet valve is arranged on the shell head, a gas outlet hole is formed in the gas outlet valve, a gas supply hole and a sealing groove communicated with the gas outlet hole are formed in the shell, a cock inserted into the sealing groove in an attached mode is connected to the shell in a threaded mode, and a gas outlet hole is formed in the gas outlet valve. A sealing groove is formed in the outer side of the shell, an air supply hole is formed in the sealing groove, an air supply channel communicated with the sealing groove and the air supply hole is formed in the lower portion of the plug cock, the plug cock is screwed into the air supply channel to block the air supply channel so as to separate the sealing groove from the air supply hole, a rotary knob located on the outer side of the shell is arranged on the plug cock, and an annular groove located between the shell head and the plug cock is further formed in the outer side of the shell. The annular groove is sleeved with a breathing bag. The breathing bag has the beneficial effects that in the using process, the rotary knob is always located on the outer side of the breathing bag, a user can directly observe the state of the rotary knob and operate the rotary knob, and the breathing bag is convenient to use.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure reducers, and in particular relates to a gas pressure reducer. Background Art

[0002] In high-risk working environments such as mining and field surveys, oxygen needs to be supplied to personnel in emergency situations to ensure their life safety. In the process of oxygen supply, the high-pressure oxygen in the cylinder needs to be converted into stable and low-pressure oxygen before it can be delivered to personnel. This requires the use of a gas reducer, which is a device specifically used to reduce high-pressure gas to a safe use pressure.

[0003] The gas reducer is connected to the gas cylinder and the breathing bag. After the valve of the gas cylinder is opened, the gas in the gas cylinder is decompressed through the gas reducer and enters the breathing bag to provide oxygen for the personnel. In addition, most gas reducers are also equipped with an outlet hole that can be manually controlled to open and close. When the personnel are in an extremely hypoxic state, opening the outlet hole can further increase the oxygen supply. When the user only needs normal oxygen supply, closing the outlet hole can reduce oxygen consumption and maintain oxygen supply for the user for a longer time.

[0004] Most of the existing gas pressure reducers control the opening and closing of the air outlet through a push button. The air outlet is located below the button. The air outlet is opened by pressing the button, and the air outlet is closed by pressing the button again. In actual use, in order to prevent oxygen from leaking directly to the outside, most breathing bags directly cover the button and the air outlet together. This makes it impossible for users to directly locate the button by observation, and it is also impossible to judge the status of the air outlet based on the status of the button, which is quite inconvenient. Summary of the invention

[0005] The existing gas pressure reducer is provided with an air outlet and a button for manually controlling the opening and closing of the air outlet. Since the button is covered in the breathing bag, the user cannot directly find the button by observation, and also cannot judge the state of the air outlet. To solve these problems, the following invention is proposed: A gas pressure reducer comprises a shell and a shell head arranged at the end of the shell, the shell head is provided with an air outlet valve, the air outlet valve is provided with an air outlet hole, an air supply hole and a sealing groove connected to the air outlet hole are provided in the shell, a plug is threadedly connected to the shell and fits into the sealing groove, an air supply channel connecting the sealing groove and the air supply hole is provided below the plug, and an annular groove is also provided between the shell head and the plug on the outer side of the shell.

[0006] When in use, the opening of the breathing bag needs to be placed in the annular groove. Since the plug is located outside the breathing bag, the user can directly rotate it. By rotating the plug in the sealing groove, the air supply channel can be blocked or unblocked, thereby closing or opening the air outlet.

[0007] Furthermore, a fixing sleeve is provided on the outside of the shell and is inserted into the sealing groove. The plug is threadedly connected to the fixing sleeve. A knob located outside the shell is provided at one end of the plug, and a conical plug is provided at the other end. The air supply channel is located below the plug. By turning the knob to control the plug to move toward the sealing groove, the plug moves with the plug and blocks the air supply channel.

[0008] Furthermore, the cock is provided with a stopper blocking the bottom of the fixed sleeve, a first sealing ring is provided between the stopper and the plug head, a second sealing ring fitting with the sealing groove is provided on the outside of the fixed sleeve, and the second sealing ring enables a sealed connection between the fixed sleeve and the sealing groove to prevent gas from leaking out of the sealing groove.

[0009] Furthermore, a quantitative valve is provided on the shell head, and a conical surface and a quantitative hole located at the center of the conical surface are provided on the quantitative valve. The quantitative hole is connected with the air supply hole, and the quantitative hole is always maintained in an open state to ensure that there is a minimum oxygen supply in the breathing bag.

[0010] Furthermore, the shell head is provided with a mounting groove located outside the metering valve, and a metering block is threadedly connected to the mounting groove. One end of the metering block is provided with a metering head extending toward the conical surface and matching therewith, and the other end is provided with a metering groove. After the metering block is rotated in the mounting groove, the distance between the metering block and the conical surface is changed, thereby changing the minimum oxygen supply provided by the metering hole. Users can choose the appropriate minimum oxygen supply according to needs, saving oxygen consumption.

[0011] Furthermore, a connecting ring threadedly connected to the mounting groove is provided on the outer side of the adjusting block, and the connecting ring is fixedly connected to the adjusting block via a plurality of connecting arms arranged in a ring shape.

[0012] Furthermore, the shell head is also provided with a threaded connection sleeve with an annular groove, and the annular groove is formed between the annular sleeve and the shell head. When the annular sleeve is rotated, the width of the annular groove changes.

[0013] Furthermore, a safety valve and a touch rod are provided on the shell head, a touch rod is provided at one end of the touch rod, and a self-compensating valve is fixedly connected to the other end. A piston assembly is provided in the shell, and the piston assembly is elastically connected to the self-compensating valve through a self-compensating spring. The air supply hole is located at the center of the piston assembly.

[0014] Furthermore, a sealing ring is provided between the piston assembly and the housing to seal the two.

[0015] Furthermore, the knob is also provided with a plurality of grooves extending vertically and arranged in a ring shape around the knob to increase the friction force when the user turns the knob.

[0016] The present invention proposes a gas pressure reducer, which has the following beneficial effects: (1) the button of the traditional gas pressure reducer is improved into a knob and a cock, so that the user can intuitively judge the state of the air outlet according to the state of the knob; (2) the position of the annular groove is located between the shell head and the knob and is adjustable. During use, the knob will not be covered in the breathing bag, which is convenient for the user to position it; (3) the minimum oxygen supply of the quantitative hole can be controlled in advance by the adjusting block to further save oxygen consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional structure of the gas pressure reducer in the present invention is shown in FIG. Figure 1 ; Figure 2 The three-dimensional structure of the gas pressure reducer in the present invention is shown in FIG. Figure 2 ; Figure 3 The three-dimensional structure of the gas pressure reducer in the present invention is shown in FIG. Figure 3 ; Figure 4 Schematic diagram of the cross-sectional structure of the gas pressure reducer of the present invention; Figure 5 Schematic diagram of the internal structure of the gas pressure reducer of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the adjusting block in the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the metering valve in the present invention; Figure 8 It is a partial structural schematic diagram of the gas pressure reducer in the present invention.

[0018] The corresponding relationship between the illustrations and component names in the figure is as follows: 1. Shell; 2. Plug; 3. Air outlet valve; 4. Dosing valve; 5. Touch rod; 6. Annular groove; 11. Shell head; 12. Air supply hole; 13. Air supply channel; 14. Sealing groove; 15. Fixed sleeve; 16. Safety valve; 17. Pressure chamber; 21. Knob; 22. Plug; 23. First sealing ring; 24. Second sealing ring; 25. Stopper; 31. Air outlet hole; 41. Dosing hole; 42. Mounting groove; 43. Adjusting block; 44. Adjusting head; 45. Connecting ring; 46. Connecting arm; 47. Conical surface; 48. Adjusting groove; 51. Contact; 52. Self-compensating valve; 53. Self-compensating spring; 54. Piston assembly; 55. Sealing ring; 61. Annular sleeve. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0021] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0022] like Figure 1-Figure 8As shown, it is a preferred embodiment of the present invention, a gas pressure reducer, including a shell 1 and a shell head 11 arranged at the end of the shell 1, an air outlet valve 3 and a quantitative valve 4 are arranged on the end surface of the shell head 11, the air outlet valve 3 is provided with an air outlet hole 31 passing through it, and the quantitative valve 4 is provided with a quantitative hole 41 passing through it, and an air supply hole 12, a pressure chamber 17, and an air supply channel 13 are arranged in the shell 1, the air supply hole 12 is located at the center of the shell 1 and is connected to the pressure chamber 17, the air supply channel 13 extends vertically and is also connected to the pressure chamber 17, and the quantitative hole 41 It is directly connected with the pressure chamber 17, that is, in the present embodiment, the air supply hole 12 is always connected with the air supply channel 13 and the quantitative hole 41, and a sealing groove 14 vertically penetrating the shell 1 is also provided above the air supply channel 13, wherein the air outlet hole 31 is also connected with the sealing groove 14, and a plug 2 is threadedly connected to the sealing groove 14 on the outer side of the shell 1, and the plug 2 is in contact with the top opening of the sealing groove 14 to form a sealing structure therebetween to separate the sealing groove 14 from the outside, and an annular groove 6 is also provided on the shell 1 between the shell head 11 and the plug 2.

[0023] After the gas reducer is connected to the gas cylinder, the opening of the breathing bag needs to be sealed and connected to the annular groove 6. When the valve of the gas cylinder is opened, high-pressure oxygen will flow out from the gas supply hole 12, and then the oxygen will enter the breathing bag through the outlet hole 31 and the quantitative hole 41 to supply oxygen to the user. The quantitative hole 41 is always in an open state to maintain a minimum oxygen supply for the breathing bag. In the initial state, the end of the stopcock 2 blocks the gas supply channel 13 to separate the sealing groove 14 and the outlet hole 31. At this time, oxygen cannot enter the outlet hole 31 through the sealing groove 14. The stopcock 2 is rotated to move away from the gas supply channel 13 until it no longer blocks the gas supply channel 13. The gas supply channel 13, the sealing groove 14, and the outlet hole 31 are connected. At this time, oxygen can also enter the breathing bag through the outlet hole 31 to maintain a higher oxygen supply for the breathing bag.

[0024] In this embodiment, if Figure 1-Figure 5As shown, a fixing sleeve 15 is fixedly provided on the outside of the housing 1 and is inserted into the sealing groove 14. The plug 2 is threadedly connected to the inside of the fixing sleeve 15. A knob 21 located outside the housing 1 is fixedly provided at one end of the plug 2. A plurality of grooves extending vertically and arranged in a ring are provided around the knob 21. A conical plug head 22 is provided at the other end of the plug 2. The air supply channel 13 is located below the plug head 22. When the user rotates the knob 21 to drive the plug 2 to move, the distance between the plug head 22 and the air supply channel 13 is changed. When the two are in contact, the air supply channel 13 is blocked, and oxygen cannot pass through the air supply channel 13 into the sealing groove 14. In addition, by providing an indicator mark on the knob 21, the user can intuitively judge whether the air outlet 31 is open according to the state of the knob 21.

[0025] Furthermore, if Figure 5 As shown, the stopper 2 is also provided with a block 25 and a first sealing ring 23. The block 25 is blocked below the fixed sleeve 15. When the stopper 2 moves toward the side away from the air supply channel 13, the fixed sleeve 15 will block the block 25 to prevent the stopper 2 from separating from the housing 1. The first sealing ring 23 is arranged between the block 25 and the plug head 22. The second sealing ring 24 is also sleeved on the outside of the fixed sleeve 15. The second sealing ring 24 fits with the sealing groove 14 to ensure that the sealing groove 14 and the fixed sleeve 15 are sealed. Connection.

[0026] In this embodiment, if Figure 6-Figure 7 As shown, both the metering valve 4 and the outlet valve 3 are provided with a conical surface 47, and a metering hole 41 or an outlet hole 31 is penetrated at the center of the conical surface 47. The shell head 11 is also provided with a mounting groove 42 located on the outside of the metering valve 4, and a regulating block 43 is threadedly connected to the mounting groove 42. One end of the regulating block 43 is provided with a regulating head 44 extending toward the conical surface 47 on the metering valve 4, and the regulating head 44 also has a conical structure matching the conical surface 47, and the other end is provided with a hexagonal regulating groove 48. After inserting a tool compatible with the regulating groove 48, the regulating block 43 can be rotated. After the regulating block 43 is rotated in the mounting groove 42, the distance between the regulating head 44 and the conical surface 47 will be changed. The size of the distance determines how much oxygen flowing out of the metering hole 41 can enter the breathing bag. The significance of setting the volume adjustment block 43 is that different users can select the appropriate minimum oxygen supply according to their own conditions, thereby saving oxygen consumption to a certain extent.

[0027] Furthermore, if Figure 6As shown, a connecting ring 45 threadedly connected to the mounting groove 42 is also provided on the outer side of the adjusting block 43. The connecting ring 45 is fixedly connected to the adjusting block 43 through a plurality of connecting arms 46 arranged in a ring shape, so as to indirectly realize the threaded connection between the adjusting block 43 and the mounting groove 42.

[0028] In this embodiment, the shell head 11 is further provided with an annular sleeve 61 threadedly connected to the outer side thereof. At this time, the annular groove 6 is formed between the annular sleeve 61 and the shell head 11. Figure 1-Figure 2 As shown, after the annular sleeve 61 rotates relative to the housing 1 , the width of the annular groove 6 will change.

[0029] In this city's implementation plan, Figure 5 As shown, a safety valve 16 and a feeler rod 5 are also provided on the end surface of the shell head 11, a feeler 51 is provided at one end of the feeler rod 5, and a self-compensating valve 52 is fixedly connected to the other end, the feeler rod 5 is fixedly connected to the self-compensating valve 52, a piston assembly 54 is fixedly provided in the shell 1, the air supply hole 12 is located at the center of the piston assembly 54, the piston assembly 54 is elastically connected to the self-compensating valve 52 through a self-compensating spring 53, and a sealing ring 55 is provided between the piston assembly 54 and the shell 1 to seal the two.

[0030] When in use, the feeler rod 5 and the contact 51 are both located in the breathing bag. The contact 51 can sense changes in the pressure in the breathing bag. When the pressure in the breathing bag is too high, it will push against the self-replenishing valve 52 to open, releasing part of the gas in the breathing bag to relieve the pressure.

[0031] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A gas pressure reducer, comprising a housing (1) and a housing head (11) arranged at an end of the housing (1), characterized in that: The shell head (11) is provided with an air outlet valve (3), and the air outlet valve (3) is provided with an air outlet hole (31). An air supply hole (12) and a sealing groove (14) connected to the air outlet hole (31) are provided in the shell body (1). A plug (2) is threadedly connected to the shell body (1) and is inserted into the sealing groove (14). An air supply channel (13) connecting the sealing groove (14) and the air supply hole (12) is provided below the plug (2). The plug (2) is screwed into the air supply channel (13) to seal the sealing groove (14) and separate the air supply hole (12). An annular groove (6) is also provided on the outer side of the shell body (1) and is located between the shell head (11) and the plug (2).

2. The gas pressure reducer according to claim 1, characterized in that: A fixing sleeve (15) is also provided on the outside of the housing (1) and is inserted into the sealing groove (14). The plug (2) is threadedly connected to the fixing sleeve (15). A knob (21) located outside the housing (1) is provided at one end of the plug (2), and a conical plug head (22) is provided at the other end. The air supply passage (13) is located below the plug head (22). When the plug (2) is screwed into the sealing groove (14), the plug head (22) moves with the plug (2) and blocks the air supply passage (13).

3. The gas pressure reducer according to claim 2, characterized in that: The cock (2) is also provided with a stopper (25) which blocks the bottom of the fixed sleeve (15); a first sealing ring (23) is provided between the stopper (25) and the plug head (22); and a second sealing ring (24) which fits the sealing groove (14) is also sleeved on the outside of the fixed sleeve (15).

4. The gas pressure reducer according to claim 1, characterized in that: A metering valve (4) is also provided on the shell head (11), and a conical surface (47) and a metering hole (41) located at the center of the conical surface (47) are provided on the metering valve (4), and the metering hole (41) is connected to the air supply hole (12).

5. The gas pressure reducer according to claim 4, characterized in that: The shell head (11) is provided with a mounting groove (42) located outside the metering valve (4); a metering block (43) is connected to the mounting groove (42) through an internal thread; one end of the metering block (43) is provided with a metering head (44) extending toward and matching the conical surface (47); the other end of the metering block (43) is provided with a metering groove (48); when the metering block (43) rotates in the mounting groove (42), the distance between the metering block (43) and the conical surface (47) is changed.

6. The gas pressure reducer according to claim 5, characterized in that: The outer side of the adjusting block (43) is also provided with a connecting ring (45) threadedly connected to the mounting groove (42); the connecting ring (45) is fixedly connected to the adjusting block (43) via a plurality of connecting arms (46) arranged in a ring shape.

7. The gas pressure reducer according to claim 1, characterized in that: The shell head (11) is also provided with a threaded connection sleeve having an annular groove (6), the annular groove (6) being formed between the annular sleeve (61) and the shell head (11), and the width of the annular groove (6) is changed when the annular sleeve (61) is rotated.

8. The gas pressure reducer according to claim 1, characterized in that: The shell head (11) is also provided with a safety valve (16) and a feeler rod (5); one end of the feeler rod (5) is provided with a feeler (51); the other end is fixedly connected to a self-compensating valve (52); a piston assembly (54) is provided in the shell (1); the piston assembly (54) is elastically connected to the self-compensating valve (52) via a self-compensating spring (53); and the air supply hole (12) is located at the center of the piston assembly (54).

9. The gas pressure reducer according to claim 8, characterized in that: A sealing ring (55) is also provided between the piston assembly (54) and the housing (1) and is sealed to both.

10. The gas pressure reducer according to claim 2, characterized in that: The knob (21) is also provided with a plurality of grooves extending vertically and arranged in a ring shape around its periphery.

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