Bottle valve structure

Abstract

A bottle valve structure includes: a valve body, provided with a valve cavity, and an air inlet and an air outlet both connected to the valve cavity, the valve cavity being provided with a valve hole; a valve core, installed in the valve cavity and movable along the axial direction of the air inlet, the valve core being provided with a blocking rod for blocking the air inlet, a gap zone being formed between the side wall of the blocking rod and the wall of the valve hole; a protective baffle, slidably sleeved on the blocking rod, the protective baffle being detachably connected to the valve cavity and axially fixed relative to the valve body, the protective baffle being provided with a receiving portion that cooperates and connects to the gap zone, the receiving portion being used to achieve blocking of the gap zone. The above scheme disperses the thrust of high-pressure gas to the valve body through the protective baffle, effectively reducing the thrust of high-pressure gas on the valve core, improving the matching stability between the valve core and the valve body, and increasing the service life of the bottle valve.

Description

Technical Field

[0001] The present invention relates to the technical field of valve bodies, and in particular to a bottle valve structure. Background Art

[0002] Gas cylinders are widely used in both industrial and medical fields. For ease of storage and transportation, they typically contain highly compressed gas. To achieve normal pressure output of the high-pressure gas within the cylinder, a valve is often installed at the mouth of the cylinder. When the high-pressure gas in the cylinder needs to be accessed, the valve is opened to control the degree of its opening, converting the high-pressure gas within the cylinder to normal or low-pressure gas for output.

[0003] A bottle valve consists of a valve body and a valve core. The valve body is equipped with a high-pressure air inlet and a low-pressure air outlet. The high-pressure air inlet is connected to the bottle body. Conventional technology generally controls the valve core to block or open the high-pressure air inlet to achieve the valve's opening and closing function. However, due to the high air pressure in the high-pressure air inlet, a large thrust is applied to the valve core. This not only increases the regulating resistance of the valve core relative to the valve body, but also easily causes the valve core to fail or damage the matching structure relative to the valve body when the air pressure in the bottle is too high, posing a safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that due to the high air pressure in the high-pressure air inlet hole of the bottle valve, a large thrust will be applied to the valve core, which will not only increase the adjustment resistance of the valve core relative to the valve body, but also easily cause the matching structure of the valve core relative to the valve body to fail or be damaged when the air pressure in the bottle is too high.

[0005] In order to solve the above problems, the present invention provides a bottle valve structure, comprising:

[0006] The valve body is provided with a valve cavity, and an air inlet and an air outlet both connected to the valve cavity, and a valve hole coaxial with the air inlet is provided on one side of the valve cavity close to the air inlet;

[0007] A valve core, wherein the valve core is provided with a blocking rod disposed toward the air inlet, the valve core being installed in the valve cavity and movable along the axial direction of the air inlet to open or close the air inlet by the blocking rod, the blocking rod extending into the valve hole and forming a gap between the side wall of the blocking rod and the inner peripheral wall of the valve hole;

[0008] An annular protective sleeve is slidably connected to the blocking rod. The protective sleeve is detachably connected to the valve body and is fixed relative to the valve body in the axial direction. The protective sleeve is provided with a receiving portion that is matched and connected to the gap area, and the receiving portion is used to achieve sealing of the gap area.

[0009] Compared with the prior art, the above scheme sets a gap area between the outer side wall of the blocking rod of the valve core and the inner peripheral wall of the valve hole. When the blocking rod is separated from the air inlet hole to open the air inlet hole, only a part of the high-pressure gas will act on the blocking rod, and the other part of the high-pressure gas will enter the gap area, reducing the axial thrust of the high-pressure gas on the blocking rod; at the same time, the high-pressure gas entering the gap area will act on the receiving part of the protective baffle sleeve, so that the protective baffle sleeve can disperse and transmit the thrust of the high-pressure gas to the valve body. At this time, due to the sealing effect of the protective baffle sleeve on the gap area, the problem of high-pressure gas flowing into the valve cavity from the valve hole can be avoided, thereby improving the matching stability between the valve core and the valve body and increasing the service life of the bottle valve.

[0010] Preferably, the receiving portion is an annular boss, disposed in the middle of the end surface of the protective sleeve facing the gap region, and inserted into the gap region. The boss of the protective sleeve can effectively absorb the thrust of the high-pressure gas, allowing the protective sleeve to better disperse and transmit the thrust to the valve body, making the overall structure more compact and stable.

[0011] Preferably, the above scheme also includes a plurality of sealing rings, which are sleeved on the blocking rod and located between the protective baffle sleeve and the air inlet hole, thereby effectively improving the sealing between the blocking rod and the valve hole and reducing the leakage of high-pressure gas from the gap area.

[0012] Preferably, the above scheme also includes a retaining ring, and an annular raised ring is provided on the side of the end of the blocking rod facing the air inlet. The sealing ring and the retaining ring are both located between the protective baffle and the raised ring, and the sealing ring and the retaining ring are arranged at intervals, which not only improves the sealing effect, but also allows the thrust of the high-pressure gas in the air inlet to be better transmitted to the protective baffle.

[0013] Preferably, the inner peripheral wall of the valve cavity is provided with a card groove, and the outer edge of the protective sleeve is card-connected to the card groove, thereby achieving a stable connection between the protective sleeve and the valve body, ensuring that the high-pressure gas thrust exerted on the protective sleeve can be transmitted from the groove wall of the card groove to the valve body.

[0014] Preferably, the peripheral wall of the card slot is provided with an overpressure protection hole connected to the outside of the valve body, and the end face of the protective sleeve facing away from the air inlet is provided with a radially arranged flow groove, and the flow groove passes through the inner annular surface and the outer annular surface of the protective sleeve, so that when an unexpected situation occurs and causes high-pressure gas to leak through the gap area, the leaked gas can be discharged from the valve cavity through the pressure protection hole.

[0015] Preferably, the end of the blocking rod of the valve core facing the air inlet is detachably connected to a plug, and the plug gradually narrows in the direction close to the air inlet to form a conical structure, thereby achieving a better sealing effect on the air inlet.

[0016] Preferably, the axes of the air inlet and the air outlet are perpendicular to each other, so that the high-pressure gas flowing out of the air inlet can enter the air outlet after turning, thereby achieving pressure reduction.

[0017] Preferably, a screw hole coaxial with the air inlet hole is provided on the side of the valve cavity away from the air inlet hole, and the outer wall of the valve core is provided with an external thread. The valve core is movably screwed to the screw hole so that when the valve core rotates in the screw hole, the valve core moves axially in the valve cavity.

[0018] Preferably, the above solution further includes a handwheel, which is connected to the side of the valve core away from the blocking rod. The handwheel is used to drive the valve core to rotate relative to the screw hole, and the adjustment is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of a bottle valve structure;

[0020] Figure 2 Schematic diagram of a top view of a bottle valve structure;

[0021] Figure 3 For the Figure 2 Schematic cross-sectional view of the AA section line;

[0022] Figure 4 For the Figure 2 Schematic cross-sectional view of the middle BB section line;

[0023] Figure 5 A cross-sectional view of the valve core, plugging rod and protective sleeve of a bottle valve structure;

[0024] Figure 6 The figure is a schematic diagram of the matching of the blocking rod and the protective baffle sleeve of a bottle valve structure.

[0025] Description of reference numerals:

[0026] 1. Valve body; 101. Valve main body; 102. Valve cover body; 11. Valve cavity; 111. Valve hole; 112. Screw hole; 12. Air inlet; 13. Air outlet; 14. Slot; 15. Overpressure protection hole; 2. Valve core; 21. Connecting rod; 211. Raised ring; 212. Embedded groove; 22. External thread; 23. Plug; 31. Protective sleeve; 311. Boss; 312. Flow groove; 32. Sealing ring; 33. Retaining ring; 4. Handwheel; 41. Spline groove. Specific embodiments

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should also be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] See also Figures 1-6 , an embodiment of the present invention provides a bottle valve structure, comprising:

[0029] The valve body 1 is provided with a valve cavity 11, and an air inlet 12 and an air outlet 13 both connected to the valve cavity 11. A valve hole 111 coaxial with the air inlet 12 is provided on one side of the valve cavity 11 close to the air inlet 12.

[0030] The valve core 2 is provided with a blocking rod 21 disposed toward the air inlet 12. The valve core 2 is installed in the valve cavity 11 and can move axially along the air inlet 12 to open or close the air inlet 12 by the blocking rod 21. The blocking rod 21 extends into the valve hole 111 and forms a gap between the side wall of the blocking rod 21 and the inner peripheral wall of the valve hole 111.

[0031] The annular protective sleeve 31 is slidably connected to the blocking rod 21. The protective sleeve 31 is detachably connected to the valve body 1 and is fixed relative to the valve body 1 in the axial direction. The protective sleeve 31 is provided with a receiving portion that is matched to be connected to the gap area, and the receiving portion is used to achieve blocking of the gap area.

[0032] When the above scheme is in use, by adjusting the moving distance of the valve core 2 in the valve cavity 11, when the blocking rod 21 abuts against the air inlet hole 12, the air inlet hole 12 and the air outlet hole 13 are in a disconnected state; when the blocking rod 21 is separated from the air inlet hole 12, the air inlet hole 12 and the air outlet hole 13 become connected. Compared with the prior art, the above scheme sets a gap area between the outer wall of the blocking rod 21 and the inner wall of the valve hole 111. When the blocking rod 21 is separated from the air inlet hole 12 to open the air inlet hole 12, only a part of the high-pressure gas will act on the blocking rod 21, and the other part of the high-pressure gas will enter the gap area, reducing the axial thrust of the high-pressure gas on the blocking rod 21; at the same time, the high-pressure gas entering the gap area will act on the receiving part of the protective baffle sleeve 31, so that the protective baffle sleeve 31 can disperse and transmit the thrust of the high-pressure gas to the valve body 1. At this time, due to the sealing effect of the protective baffle sleeve 31 on the gap area, the problem of high-pressure gas flowing into the valve cavity 11 from the valve hole 111 can be avoided, thereby improving the matching stability between the valve core 2 and the valve body 1 and increasing the service life of the bottle valve.

[0033] The matching relationship between the valve core 2 and the valve body 1 can be any form in the prior art, that is, as long as the valve core 2 can be moved relative to the valve body 1 along the axis of the air inlet 12. To make the description more specific, this embodiment is described with the valve core 2 along the vertical direction as the reference direction. The air inlet 12 is arranged vertically and connected to the lower part of the valve cavity 11, and the air outlet 13 is arranged horizontally and connected to the right side of the lower part of the valve cavity 11. Since the axes of the air inlet 12 and the air outlet 13 are perpendicular to each other, the high-pressure gas flowing out of the air inlet 12 can enter the air outlet 13 after turning, achieving a better pressure reduction effect. A screw hole 112 coaxial with the air inlet 12 is provided on the side of the valve cavity 11 away from the air inlet 12. The outer wall of the valve core 2 is provided with an external thread 22 so that the valve core 2 can be movably screwed to the screw hole 112. Therefore, by rotating the valve core 2, the vertical movement distance of the valve core 2 in the valve body 1 can be controlled. The blocking rod 21 is connected to the lower portion of the valve core 2 and, driven by the valve core 2, abuts against or separates from the air inlet 12, corresponding to the on / off control of the air inlet 12. Furthermore, a handwheel 4 is provided on the side of the valve core 2 away from the blocking rod 21. The upper end of the valve core 2 is provided with a spline. The handwheel 4 is connected to the spline of the valve core 2 via a spline groove 41, achieving circumferential fixation between the handwheel 4 and the valve core 2, thereby enabling the handwheel 4 to drive the valve core 2 to rotate relative to the valve body 1, making adjustment simple and convenient.

[0034] In this embodiment, the diameter of the valve hole 111 is larger than the diameter of the blocking rod 21. The upper portion of the blocking rod 21 is positioned above the valve hole 111, while the lower portion of the blocking rod 21 extends into the valve hole 111, creating an annular gap between the sidewall of the lower portion of the blocking rod 21 and the inner circumferential wall of the valve hole 111. An annular protective sleeve 31 is slidably mounted on the upper portion of the blocking rod 21. The mounting portion is a downwardly projecting boss 311 located in the middle of the lower end surface of the protective sleeve 31. The boss 311 engages the gap. The boss 311 effectively absorbs the thrust of the high-pressure gas and effectively transmits the thrust to the valve body 1 through the protective sleeve 31. This also results in a more compact and stable overall structure. It should be noted that the protective sleeve 31 is preferably mounted on the blocking rod 21 in a manner that allows both relative sliding and relative rotation, thereby preventing wear between the protective sleeve 31 and the valve body 1.

[0035] As an optimized solution, the above solution also includes at least one sealing ring 32 and several retaining rings 33. It should be noted that the above "several" includes the case where the number is zero. The sealing ring 32 is preferably made of rubber, and the retaining ring 33 is made of metal. As shown in the figure, in this embodiment, there are two sealing rings 32 and retaining rings 33. Both the sealing ring 32 and the retaining ring 33 are sleeved on the blocking rod 21 and are located between the protective baffle 31 and the air inlet 12. The sealing ring 32 and the retaining ring 33 are arranged at intervals, so that the thrust of the high-pressure gas will pass through the sealing ring 32 and the retaining ring 33 and then be transmitted to the protective baffle 31. The provision of the sealing ring 32 can effectively improve the sealing between the protective baffle 31, the blocking rod 21 and the valve hole 111, and reduce the leakage of high-pressure gas from the gap area, while the retaining ring 33 can play a role in separating the sealing ring 32. Furthermore, in this embodiment, an annular raised ring 211 is provided on the side surface of the end of the blocking rod 21 facing the air inlet 12. The raised ring 211 serves to axially limit the sealing ring 32 and the retaining ring 33, thereby confining both the sealing ring 32 and the retaining ring 33 to the position between the protective sleeve 31 and the raised ring 211. Furthermore, in the above embodiment, the sealing ring 32 is adjacent to the protective sleeve 31, while the retaining ring 33 is adjacent to the raised ring 211. Therefore, when the valve core 2 drives the blocking rod 21 and the plug 23 to rotate, the retaining ring 33 can separate the sealing ring 32 and the raised ring 211, thereby improving the sealing effect and better transmitting the thrust of the high-pressure gas in the air inlet 12 to the protective sleeve 31.

[0036] Furthermore, a plug 23 is detachably connected to the end of the plugging rod 21 of the valve core 2 that faces the air inlet 12. The plug 23 and the plugging rod 21 may be threaded, clipped, or otherwise connected. For example, in this embodiment, a recessed groove 212 is provided at the lower end of the plugging rod 21, and a raised structure is provided at the upper end of the plugging rod 23, which clips into the groove 212 with an interference fit. The lower end of the plugging rod 23 gradually narrows toward the air inlet 12 to form a conical structure, thereby effectively sealing the air inlet 12.

[0037] In this embodiment, the outer edge of the protective sleeve 31 is snapped into the retaining groove 14 on the inner circumferential wall of the valve chamber 11. The retaining groove 14 is preferably annular, thereby ensuring a stable connection between the protective sleeve 31 and the valve body 1 and ensuring that the upward thrust of high-pressure gas applied to the protective sleeve 31 is transmitted from the upper wall of the retaining groove 14 to the valve body 1. More specifically, in this embodiment, the valve body 1 comprises a valve body 101 and a valve cover 102. The upper portion of the valve body 101 is provided with a mounting groove for the valve cover 102. The height of the valve cover 102 is less than the depth of the mounting groove of the valve body 101, so that the gap between the lower end surface of the valve cover 102 and the bottom of the mounting groove of the valve body 101 forms the retaining groove 14. The upper portion of the valve chamber 11 and the screw hole 112 are both located within the valve cover 102, while the lower portion of the valve chamber 11, namely the valve hole 111, is located within the valve body 101, facilitating processing and assembly. Of course, the detachable connection between the protective sleeve 31 and the valve body 1 can also be in other forms, for example, an internal thread is set on the inner wall of the valve cavity 11 and an external thread is set on the outer edge of the protective sleeve 11, so that the protective sleeve 31 is screwed into the interior of the valve cavity 11.

[0038] Furthermore, the peripheral wall of the retaining groove 14 is provided with an overpressure protection hole 15 connected to the outside of the valve body 1, and the upper end surface of the protective baffle 31 is provided with a radially arranged flow groove 312, which penetrates the inner and outer annular surfaces of the protective baffle 31. Therefore, when an unexpected situation causes high-pressure gas to leak through the gap area, the leaked gas can be discharged from the valve cavity 11 through the overpressure protection hole 15. It should be understood that since the retaining groove 14 and the valve cavity 11 are interconnected, in other embodiments, the overpressure protection hole 15 can also be directly provided on the inner peripheral wall of the valve cavity 11, and the interior of the valve cavity 11 is connected to the outside of the valve body 1, ensuring that when the leaked gas enters the valve cavity 11, it can be discharged from the overpressure protection hole 15 to the outside of the valve body 1.

[0039] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. For those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the invention.

Claims

1. A bottle valve structure, characterized in that: include: A valve body (1) is provided with a valve cavity (11), and an air inlet (12) and an air outlet (13) both connected to the valve cavity (11); a valve hole (111) coaxial with the air inlet (12) is provided on one side of the valve cavity (11) close to the air inlet (12); A valve core (2), the valve core (2) being provided with a blocking rod (21) disposed toward the air inlet hole (12), the valve core (2) being installed in the valve cavity (11) and being movable along the axial direction of the air inlet hole (12) so as to enable the blocking rod (21) to open or close the air inlet hole (12), the blocking rod (21) extending into the valve hole (111) and forming a gap between a side wall of the blocking rod (21) and an inner peripheral wall of the valve hole (111); an annular protective sleeve (31) is slidably sleeved on the blocking rod (21); the protective sleeve (31) is detachably connected to the valve body (1) and is fixed relative to the valve body (1) in the axial direction; the protective sleeve (31) is provided with a receiving portion that is cooperatively connected to the gap area, and the receiving portion is used to achieve blocking of the gap area; The inner peripheral wall of the valve cavity (11) is provided with a clamping groove (14), and the outer edge of the protective baffle (31) is clamped to the clamping groove (14); An overpressure protection hole (15) communicating with the outside of the valve body (1) is provided on a peripheral wall of the clamping groove (14), and an overflow groove (312) arranged radially is provided on the end surface of the protective sleeve (31) facing away from the air inlet (12), and the overflow groove (312) penetrates the inner and outer annular surfaces of the protective sleeve (31).

2. A bottle valve structure according to claim 1, characterized in that: The receiving portion is an annular boss (311), the boss (311) is arranged in the middle of the end surface of the protective sleeve (31) facing the gap area, and the boss (311) is inserted into the gap area.

3. A bottle valve structure according to claim 2, characterized in that: It also includes a plurality of sealing rings (32), which are sleeved on the blocking rod (21) and located between the protective baffle (31) and the air inlet (12).

4. A bottle valve structure according to claim 3, characterized in that: It also includes a retaining ring (33), and an annular raised ring (211) is provided on the side of one end of the blocking rod (21) facing the air inlet (12). The sealing ring (32) and the retaining ring (33) are both located between the protective sleeve (31) and the raised ring (211), and the sealing ring (32) and the retaining ring (33) are arranged at intervals.

5. The bottle valve structure according to claim 1, characterized in that: One end of the plugging rod (21) of the valve core (2) facing the air inlet (12) is detachably connected to a plug (23), and the plug (23) gradually narrows in a direction approaching the air inlet (12) to form a conical structure.

6. The bottle valve structure according to claim 1, characterized in that: The axes of the air inlet (12) and the air outlet (13) are perpendicular to each other.

7. The bottle valve structure according to claim 1, characterized in that: A screw hole (112) coaxial with the air inlet hole (12) is provided on a side of the valve cavity (11) away from the air inlet hole (12), an outer wall of the valve core (2) is provided with an external thread (22), and the valve core (2) is movably screwed to the screw hole (112) so that when the valve core (2) rotates in the screw hole (112), the valve core (2) moves axially in the valve cavity (11).

8. The bottle valve structure according to claim 7, characterized in that: It also includes a handwheel (4), which is connected to a side of the valve core (2) away from the blocking rod (21), and is used to drive the valve core (2) to rotate relative to the screw hole (112).

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