Self-closing bottle valve with anti-theft charging function

Abstract

This application relates to the field of liquefied petroleum gas cylinder valves and discloses a self-closing bottle valve with anti-theft charging function, including: Among them, the valve body is provided with a lock core cavity (2.4), a valve core cavity (2.5) and a charging flow channel for inflation; The anti-charging self-closing valve core is accommodated in the valve core cavity. When the anti-charging lock core is in the closed state, the charging flow channel is blocked, so that the self-closing bottle valve is in the anti-theft charging state. When the anti-charging lock core is in the open state, the charging flow channel is opened, so that the self-closing bottle valve is in the state of allowing inflation; The anti-charging lock core (7) is configured to be opened or closed by a matching key (10). Among them, the anti-charging lock core (7) is provided with one or more magnetic lock pins, and the key is provided with a magnetic core (10.1) corresponding to the magnetic lock pins. The bottle valve of the present invention has high safety performance, simple structure and convenient operation.

Description

Technical Field

[0001] This application relates to the field of liquefied petroleum gas cylinder valves, and particularly to a self-closing cylinder valve with an anti-theft filling function. Background Art

[0002] Currently, domestic companies operating liquefied petroleum gas basically purchase steel cylinders and cylinder valves that meet national standards by themselves and then provide them to customers for free. The liquefied petroleum gas used by customers is filled by the company. In this way, domestic companies operating liquefied petroleum gas can obtain profits by selling liquefied petroleum gas, while ensuring the quality of steel cylinders and cylinder valves and regular filling.

[0003] However, the emergence of some informal filling points has disrupted this state. These filling points do not need to bear the costs of steel cylinders and cylinder valves, and the filling equipment is simple. In some places, even cheap dimethyl ether and other components are added to liquefied petroleum gas to reduce the filling cost. Many customers, due to a lack of safety awareness and in pursuit of cheapness, often choose these informal filling points. As a result, the problem of theft filling has become a pain point for many liquefied gas companies. According to incomplete statistics, some liquefied gas companies lose 30%-40% of their total inventory of steel cylinders every year.

[0004] This kind of theft filling behavior by informal filling points not only causes huge economic losses to liquefied gas companies that provide steel cylinders and cylinder valves, but also brings huge potential safety hazards.

[0005] There are mainly two types of liquefied petroleum gas cylinder valves. One is the cylinder valve with a handwheel switch, simply called the angle valve (GB 7512-2017 "Liquefied Petroleum Gas Cylinder Valve"); the other is the quick-connect plug-in cylinder valve without a handwheel switch, simply called the straight valve (GB 35208-2017 "Self-Closing Liquefied Petroleum Gas Cylinder Valve"). Due to its complex structure, low safety, and high manufacturing cost, the original market of the angle valve is being occupied by the straight valve. In order to solve the pain point of theft filling for liquefied petroleum gas companies and transfer the pressure of straight valve replacement, many anti-theft filling angle valves have emerged on the market. The main technologies include password locks, magnetic locks, etc. These anti-filling structures are either very complex, with high manufacturing costs and troublesome operations; or simple in structure, with poor anti-theft filling effects and are easily cracked. This has brought many troubles to liquefied petroleum gas companies when purchasing cylinder valves.

[0006] Therefore, combining the advantages of the straight valve, it is of great significance to develop a self-closing liquefied petroleum gas cylinder valve with anti-theft filling function, simple structure and low manufacturing cost. Summary of the Invention

[0007] The purpose of this application is to provide a self-closing cylinder valve with an anti-theft filling function, which has high safety performance, simple structure and convenient operation.

[0008] The present application discloses a self-closing bottle valve with anti-theft charging function, including:

[0009] a valve body (2), an anti-charging self-closing valve core (3) and an anti-charging lock core (7);

[0010] wherein, the valve body is provided with a lock core cavity (2.4), a valve core cavity (2.5) and a charging air flow passage for inflation;

[0011] The anti-charging self-closing valve core is accommodated in the valve core cavity and is configured to prevent inflation; and when the anti-charging lock core is in the closed state, the charging air flow passage is closed, so that the self-closing bottle valve is in the anti-theft charging state, and when the anti-charging lock core is in the open state, the charging air flow passage is opened, so that the self-closing bottle valve is in the state allowing inflation;

[0012] The anti-charging lock core (7) is configured to be opened or closed by a matching key (10). Wherein, the anti-charging lock core (7) is provided with one or more magnetic lock pins, and the key is provided with a magnetic core (10.1) corresponding to the magnetic lock pins. When the matching key is correctly inserted into the anti-charging lock core, the magnetic lock pins interact with the magnetic core to make the anti-charging lock core in the open state; when the anti-charging lock core is in the closed state and the matching key is pulled out from the anti-charging lock core, the magnetic lock pins are reset, resulting in the anti-charging lock core being in the closed state.

[0013] In a preferred example, when the anti-charging lock core is in the open state, the anti-charging self-closing valve core is lifted, so that the charging air flow passage is opened.

[0014] In a preferred example, when the anti-charging lock core is in the open state, a bypass charging air flow passage is formed by the rotation of the anti-charging lock core, so that the charging air flow passage is conducted.

[0015] In a preferred example, when the matching key is correctly inserted into the anti-charging lock core, the magnetic lock pins interact with the magnetic core, making the anti-charging lock core in the state to be opened, and the anti-charging lock core is rotated by rotating the key, so that the anti-charging lock core is rotated to the open state or the closed state.

[0016] In a preferred example, the lock core cavity includes a lock core installation cavity (2.4.6), an air inlet hole (2.4.4) and an inflation hole (2.4.5);

[0017] The anti-charging lock core is accommodated in the lock core cavity. The anti-charging lock core includes a lock core body (7.3), N lock pins (7.6) and N lock pin springs (7.7); wherein, N is a positive integer ≥ 1;

[0018] The following are provided on the lock core body:

[0019] N lock pin holes (7.3.1), the lock pin (7.6) and the lock pin spring (7.7) being accommodated in the corresponding lock hole and the lock pin hole, and in a closed state, the lock pin spring pushes the lock pin into the lock hole;

[0020] a keyhole (7.3.4), the keyhole being configured to receive the key;

[0021] A guide groove (7.3.3), wherein the guide groove (7.3.3) is configured to connect the air inlet and the inflation hole when the anti-inflation lock core is in an open state, thereby making the inflation flow channel conductive.

[0022] In a preferred embodiment, the lock core cavity includes a lock core installation cavity (2.4.6);

[0023] The anti-filling lock core is accommodated in the lock core cavity, and the anti-filling lock core comprises a lock core body (7.3), N lock pins (7.6) and N lock pin springs (7.7);

[0024] The lock core body is provided with:

[0025] N lock pin holes (7.3.1), the lock pin (7.6) and the lock pin spring (7.7) being accommodated in the corresponding lock hole and the lock pin hole, and in a closed state, the lock pin spring pushes the lock pin into the lock hole;

[0026] a keyhole (7.3.4), the keyhole being configured to receive the key;

[0027] The limiting shaft (7a.3.3) is configured to limit the movement of the anti-inflation core in the normal inflation state, lift the anti-inflation self-closing valve core, thereby opening the inflation flow channel and allowing gas to bypass the anti-inflation core and inflate.

[0028] In a preferred embodiment, a limit pin hole (7.3.2) is further provided on the lock core body;

[0029] The limit pin hole is configured to accommodate a limit pin (7.4) and a limit pin spring (7.5), and the limit pin spring pushes the limit pin from the limit pin hole to the limit pin groove, so that the limit pin moves in the limit groove, thereby controlling the rotation range of the lock core body;

[0030] The number of the limit pins (7.4) and the number of the limit pin springs (7.5) are both M, where M≥1.

[0031] In a preferred embodiment, the lock core body is further provided with a knob position (7.3.5), and the knob position is configured to correspond to the knob head (10.2) on the key, so that the key can drive the lock core body to rotate;

[0032] The knob position is a convex or concave polygon;

[0033] The knob head on the key is the corresponding concave or convex polygon.

[0034] In another preferred example, the polygon is: a triangle, a square or a hexagon.

[0035] In a preferred example, it further includes a sealing pin (7.8);

[0036] One side of the sealing pin relative to the anti-filling self-closing valve core cavity is arc-shaped. When the anti-filling lock core is in the closed state, the sealing pin fits with the inflation hole to seal the inflation flow channel;

[0037] When the anti-filling lock core is in the open state, the sealing pin is separated from the inflation hole to conduct the inflation flow channel.

[0038] In a preferred example, the interaction between the magnetic lock pin and the magnetic core is selected from the following group: magnetic attraction or magnetic repulsion.

[0039] In another preferred example, the lock pin is made of a material selected from the following group: magnetic material, permanent magnet material, or a combination thereof.

[0040] In another preferred example, the magnetic material is selected from the following group: ferromagnetic material, rare earth magnetic material.

[0041] In another preferred example, when the anti-filling lock core is in the closed state, the inflation flow channel is closed by the anti-filling self-closing valve core.

[0042] In another preferred example, the self-closing bottle valve with anti-filling function further includes a return spring (4) and a lock nut (5);

[0043] The return spring is configured to reset the anti-filling self-closing valve core (3);

[0044] The lock nut is configured to support and limit the return spring.

[0045] In another preferred example, the self-closing bottle valve with anti-filling function further includes a sedimentation tube (6);

[0046] The sedimentation tube is connected to the valve body and is configured to prevent particulate pollutants in the gas cylinder from entering the interior of the bottle valve and damaging the seal of the bottle valve when cleaning the residual liquid in the gas cylinder.

[0047] In another preferred example, the anti-filling self-closing valve core includes an upper valve core (3.2), an anti-filling core (3.3), and a lower valve core (3.5);

[0048] The lower valve core includes a sealing surface (3.5.1);

[0049] The upper valve core is connected to the lower valve core;

[0050] The anti - filling core is accommodated in the upper valve core;

[0051] The anti - filling core forms a seal with the sealing surface of the lower valve core to achieve the anti - filling function.

[0052] In another preferred example, the anti - filling lock core further includes a lock core seal (7.2);

[0053] The lock core seal is configured to form a seal between the lock core body and the lock core cavity.

[0054] The technical effects of this application are as follows:

[0055] 1. In the lock core of the bottle valve of this application, there can be multiple lock pins, their positions are not fixed, and their magnetisms are different. The key fob is cylindrical, without any feature points, not easy to crack, and has high safety performance.

[0056] 2. The valve body structure of this application is simple. The anti - filling self - closing valve core is equivalent to adding a check valve to the traditional self - closing valve core. The structure is simple, the components are standard, and the manufacturing and maintenance costs are low.

[0057] A large number of technical features are recorded in the specification of this application, distributed in various technical solutions. If all possible combinations of technical features (i.e., technical solutions) of this application are to be listed, the specification will be too long. To avoid this problem, each technical feature disclosed in the above - mentioned invention content of this application, each technical feature disclosed in the following embodiments and examples, and each technical feature disclosed in the drawings can be freely combined with each other to form various new technical solutions (these technical solutions should all be regarded as having been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, features A + B + C are disclosed, in another example, features A + B + D + E are disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one of them can be used and they cannot be used simultaneously. Feature E can be combined with feature C technically. Then, the scheme of A + B + C + D should not be regarded as having been recorded because it is technically infeasible, while the scheme of A + B + C + E should be regarded as having been recorded. Brief Description of the Drawings

[0058] Figure 1 is an exploded view of a self - closing bottle valve with anti - theft and anti - filling function according to the first embodiment of this application;

[0059] Figure 2Schematic diagram of the self-closing bottle valve with anti-theft charging function according to the first embodiment of the present application;

[0060] Figure 3 Schematic diagram of the valve body according to the first embodiment of the present invention;

[0061] Figure 4 Schematic diagram of the anti-charging self-closing valve core according to the first embodiment of the present invention;

[0062] Figure 5 Schematic diagram of the upper valve core according to the first embodiment of the present invention;

[0063] Figure 6 Schematic diagrams of several preferred structures of the anti-charging core according to the present invention;

[0064] Figure 7 Schematic diagram of the lower valve core according to the first embodiment of the present invention;

[0065] Figure 8 Schematic diagram of the anti-charging lock core according to the first embodiment of the present invention;

[0066] Figure 9 Schematic diagram of the lock core fixing bracket according to the first embodiment of the present invention

[0067] Figure 10 Schematic diagram of the lock core body according to the first embodiment of the present invention;

[0068] Figure 11 Schematic diagram of the key according to the first embodiment of the present invention;

[0069] Figure 12 Schematic diagram of the usage state according to the first embodiment of the present invention;

[0070] Figure 13 Explosion diagram of the self-closing bottle valve with anti-theft charging function according to the second embodiment of the present invention;

[0071] Figure 14 Assembly schematic diagram of the self-closing bottle valve with anti-theft charging function according to the second embodiment of the present invention;

[0072] Figure 15 Schematic diagram of the valve body according to the second embodiment of the present invention;

[0073] Figure 16 Schematic diagram of the anti-charging self-closing valve core according to the second embodiment of the present invention;

[0074] Figure 17 Schematic diagram of the upper valve core according to the second embodiment of the present invention;

[0075] Figure 18 It is a schematic structural diagram of the anti-filling core according to the second embodiment of the present invention;

[0076] Figure 19 It is a schematic structural diagram of the lower valve core according to the second embodiment of the present invention;

[0077] Figure 20 It is a schematic structural diagram of the anti-filling lock core according to the second embodiment of the present invention;

[0078] Figure 21 It is a schematic structural diagram of the lock core body according to the second embodiment of the present invention;

[0079] Figure 22 It is a schematic structural diagram of the use state according to the second embodiment of the present invention;

[0080] Explanation of reference numerals:

[0081] 1 Valve body seal;

[0082] 2 Valve body, 2a Valve body, 2.1 Gas cylinder interface, 2.2 Wrench square body, 2.3 Air outlet, 2.4 Lock core cavity, 2.5 Valve core cavity; 2.3.1 Card slot, 2.3.2 Valve body seal groove, 2.3.3 Air outlet channel; 2.4.1 Retaining ring groove, 2.4.2 Limit pin groove, 2.4.3 Sealing ring groove, 2.4.4 Intake hole, 2.4.5 Inflation hole, 2.4.6 Lock core installation cavity, 2.4.7 Protective sleeve installation position; 2.5.1 Valve core sealing surface, 2.5.2 Valve core installation cavity, 2.5.3 Locking nut installation position, 2.5.4 Deposition tube installation position;

[0083] 3 Anti - filling self - closing valve core, 3a Anti - filling self - closing valve core, 3.1 Valve core seal, 3.2 Upper valve core, 3.3 Anti - filling core, 3.4 Anti - filling seal, 3.5 Lower valve core; 3.2.1 Top core, 3.2.2 Valve core seal installation groove, 3.2.3 Anti - filling seal installation groove, 3.2.4 Air inlet and outlet holes, 3.2.5 Upper valve core cavity, 3.2.6 Lower valve core connection hole; 3.5.1 Sealing surface, 3.5.2 Middle through - hole, 3.5.3 Inflation hole, 3.5.4 Return spring fixing groove, 3.5.5 Guide surface, 3.5.6 Connection surface; 3a.2 Upper valve core, 3a.3 Anti - filling core, 3a.4 Anti - filling seal, 3a.5 Lower valve core, 3a.6 Anti - filling core return spring; 3a.2.1 Top core, 3a.2.2 Valve core seal installation groove, 3a.2.3 Vent groove, 3a.2.4 Guide hole; 3a.3.1 Spring hole, 3a.3.2 Limit groove, 3a.3.3 Sealing head, 3a.3.4 Guide surface; 3a.5.1 Sealing surface, 3a.5.2 Middle through - hole, 3a.5.3 Air hole, 3a.5.4 Return spring fixing groove, 3a.5.5 Anti - filling seal installation groove, 3a.5.6 Guide surface, 3a.5.7 Limit groove;

[0084] 4 Return spring; 5 Locking nut; 6 Deposition tube;

[0085] 7 Anti - filling lock core, 7a Anti - filling lock core, 7.1 Lock core fixing bracket, 7.2 Lock core seal, 7.3 Lock core body, 7a.3 Lock core body, 7.4 Limit pin, 7.5 Limit pin spring, 7.6 Lock pin, 7.7 Lock pin spring, 7.8 Sealing pin, 7.9 Sealing pin spring; 7.1.1 Limit groove, 7.1.2 Lock hole, 7.1.3 Outer wall, 7.1.4 Inner hole, 7.1.5 Positioning end face; 7.3.1 Lock pin hole, 7.3.2 Limit pin hole, 7.3.3 Flow guide groove, 7a.3.3 Limit shaft, 7.3.4 Key hole, 7.3.5 Knob position, 7.3.6 Sealing surface, 7.3.7 Sealing pin hole;

[0086] 8 Retaining ring; 9 Protective sleeve;

[0087] 10 Key, 10.1 Magnetic core, 10.2 Knob head, 10.3 Key handle. Detailed implementation manners

[0088] In the following description, many technical details are presented for the reader to better understand this application. However, those of ordinary skill in the art can understand that the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0089] Explanation of some concepts:

[0090] The term "bottle valve" in this application can also be an ordinary valve.

[0091] The terms "open state" and "normal inflation state" in this application refer to the same state.

[0092] The terms "closed state" and "anti-inflation state" in this application refer to the same state.

[0093] To make the objectives, technical solutions, and advantages of this application clearer, the following will further describe the implementation manners of this application in detail with reference to the accompanying drawings.

[0094] The first implementation manner of this application relates to a self-closing bottle valve with an anti-theft inflation function, as Figure 2 shown. The self-closing bottle valve with an anti-theft inflation function includes:

[0095] Valve body seal 1, valve body 2, anti-inflation self-closing valve core 3, return spring 4, locking nut 5, sedimentation tube 6, anti-inflation lock core 7, retaining ring 8, protective sleeve 9, and key 10.

[0096] Figure 1 The exploded view of the self-closing bottle valve with an anti-theft inflation function according to the first implementation manner of the present invention is shown.

[0097] The structural schematic diagram of the valve body according to the first implementation manner of the present invention is as Figure 3 shown, and includes: gas cylinder interface 2.1, wrench square body 2.2, air outlet 2.3, lock core cavity 2.4, and valve core cavity 2.5.

[0098] The gas cylinder interface 2.1 is provided with threads for connecting to the gas cylinder. The valve can be tightened on the gas cylinder by using a wrench in cooperation with the wrench square body 2.2.

[0099] The air outlet 2.3 includes: card slot 2.3.1, valve body seal groove 2.3.2, and air outlet channel 2.3.3. The lock core cavity 2.4 includes: retaining ring groove 2.4.1, limit pin groove 2.4.2, sealing ring groove 2.4.3, air inlet hole 2.4.4, inflation hole 2.4.5, lock core installation cavity 2.4.6, and protective sleeve installation position 2.4.7. The valve core cavity 2.5 includes: valve core sealing surface 2.5.1, valve core installation cavity 2.5.2, locking nut installation position 2.5.3, and sedimentation tube installation position 2.5.4. The air inlet hole 2.4.4 and the inflation hole 2.4.5 in the lock core cavity 2.4 communicate with the valve core installation cavity 2.5.2.

[0100] Optionally, in one embodiment, the wrench square body 2.2 can be square or hexagonal, and the hexagonal shape is preferably used in this implementation.

[0101] Figure 4 The structural schematic diagram of the anti-inflation self-closing valve core according to the first implementation manner of the present invention is shown, and includes: valve core seal 3.1, upper valve core 3.2, anti-inflation core 3.3, anti-inflation seal 3.4, and lower valve core 3.5.

[0102] When the bottle valve needs to be closed, the valve core seal 3.1 provides sealing, and its material is preferably an elastic sealing material.

[0103] Figure 5 The structural schematic diagram of the upper valve core 3.2 of the first embodiment of the present invention is shown. The valve core 3.2 includes: a top core 3.2.1, a valve core seal mounting groove 3.2.2, an anti-filling seal mounting groove 3.2.3, air inlet and outlet holes 3.2.4, an upper valve core cavity 3.2.5, and a lower valve core connection hole 3.2.6. The top core 3.2.1 is located above the upper valve core, and below it is the valve core seal mounting groove 3.2.2 for mounting the valve core seal 3.1. The air inlet and outlet holes 3.2.4 are evenly distributed along the circumference, located below the valve core seal mounting groove 3.2.2, above the anti-filling seal mounting groove 3.2.3, and communicate with the upper valve core cavity 3.2.5. The lower valve core connection hole 3.2.6 is located below the upper valve core cavity 3.2.5, and the lower valve core connection hole 3.2.6 is a smooth hole for interference connection with the lower valve core 3.5.

[0104] Optionally, in one embodiment, the number of air inlet and outlet holes 3.2.4 can be two, four, or more. Preferably, it is four.

[0105] Optionally, in one embodiment, the form of the lower valve core connection hole 3.2.6 is determined according to the connection method with the lower valve core 3.5, and it can be a smooth hole, a threaded hole, a barbed hole, or other holes.

[0106] Figure 6Several preferred structural schematic diagrams of the anti-filling core according to the first embodiment of the present invention are shown. When the bottle valve is in the filling state, the anti-filling core forms a seal with the lower valve core 3.5, and when the bottle valve is in the open state, the anti-filling core does not form a seal with the lower valve core, so as to achieve the anti-filling effect. Among them, in the preferred solution a, the anti-filling core adopts a spherical structure. When the bottle valve is in the closed state, the spherical anti-filling core falls on the sealing surface of the lower valve core 3.5 under the action of its own weight; when the bottle valve is in the open state, the anti-filling core disengages from the sealing surface of the lower valve core 3.5 under the action of the gas pressure in the bottle; when the bottle valve is in the filling state, the spherical anti-filling core is pressed against the sealing surface of the lower valve core 3.5 under the action of the filling pressure, realizing the anti-filling function. In the preferred solution b, the anti-filling core adopts a ball-headed cylindrical structure, and a return spring is arranged above. When the bottle valve is in the closed state, the anti-filling core falls on the sealing surface of the lower valve core 3.5 under the action of the spring; when the bottle valve is in the open state, the anti-filling core overcomes the elastic force of the return spring and disengages from the sealing surface of the lower valve core 3.5 under the action of the gas pressure in the bottle; when the bottle valve is in the filling state, the anti-filling core is pressed against the sealing surface of the lower valve core 3.5 under the action of the filling pressure, realizing the anti-filling function. In the preferred solution c, the anti-filling core adopts a T-shaped cylindrical structure, and a return spring is arranged above. When the bottle valve is in the closed state, the anti-filling core falls on the sealing surface of the lower valve core 3.5 under the action of the spring; when the bottle valve is in the open state, the anti-filling core overcomes the elastic force of the return spring and disengages from the sealing surface of the lower valve core 3.5 under the action of the gas pressure in the bottle; when the bottle valve is in the filling state, the anti-filling core is pressed against the sealing surface of the lower valve core 3.5 under the action of the filling pressure, realizing the anti-filling function. Only three preferred solutions of the anti-filling core are listed here. As long as the anti-filling core solution can achieve that the anti-filling core forms a seal with the lower valve core 3.5 when the bottle valve is in the filling state, and the anti-filling core does not form a seal with the lower valve core when the bottle valve is in the open state, achieving the anti-filling effect, it falls within the scope of this invention patent.

[0107] Optionally, in one embodiment, the material of the anti-filling core can be non-magnetic materials such as copper, aluminum, hard plastic, stainless steel, etc., to prevent the external applied magnetic field from generating a force on it. Preferably, it is non-magnetic stainless steel.

[0108] The shape of the anti-filling seal 3.4 is a rotary body structure, and an elastic sealing material or plastic can be selected for production. The anti-filling seal 3.4 is installed in the anti-filling seal installation groove of the upper valve core. The small clearance fit between its outer ring and the valve core cavity of the valve body not only plays a guiding role but also can limit the flow rate, achieving the anti-filling seal effect. Preferably, the anti-filling seal 3.4 is an annular open retaining ring.

[0109] Figure 7The structural schematic diagram of the lower valve core of the first embodiment of the present invention is shown. The lower valve core 3.5 includes a sealing surface 3.5.1, a middle through hole 3.5.2, an inflation hole 3.5.3, a return spring fixing groove 3.5.4, a guiding surface 3.5.5, and a connecting surface 3.5.6. The sealing surface 3.5.1 is located on the upper end surface of the lower valve core 3.5 and can seal with the anti-inflation core 3.3 when it falls. Its structure can be determined according to the structure of the anti-inflation core 3.3, and preferably it is a smooth conical opening. The middle through hole 3.5.2 is located inside the lower valve core 3.5 and communicates the upper and lower parts inside the lower valve core 3.5. Four inflation holes 3.5.3 are evenly distributed along the circumference. The main function of the return spring fixing groove 3.5.4 is to provide positioning for the return spring and prevent friction interference between the return spring and the valve body. The guiding surface 3.5.5 has a clearance fit with the valve core cavity of the valve body and plays a guiding role. Optionally, to reduce the friction force, the outer circular guiding surface 3.5.5 can be made into a hexagon, a square, or a notched opposite side, and preferably it is a hexagon structure. The connecting surface 3.5.6 is located at the upper end of the lower valve core 3.5, and its surface can be a threaded surface, a smooth surface, or a barbed surface, etc., and can be tightly connected to the upper valve core. Preferably, it is a smooth surface to achieve a tight connection with the upper valve core through interference fit.

[0110] Optionally, in one embodiment, the inflation hole 3.5.3 can be one, or multiple evenly distributed on the circumference in the middle of the lower valve core 3.5. Preferably, it is four. Its total through diameter is greater than or equal to the designed through diameter of the valve and communicates with the middle through hole 3.5.2.

[0111] The main function of the return spring 4 is to reset the anti-inflation self-closing valve core 3. When there is no external force to push it open, the return spring 4 pushes the anti-inflation self-closing valve core 3 so that the valve core seal 3.1 fits with the inner cavity sealing surface of the valve body 2.5.1 and is in a sealed state. The elastic force of the return spring 4 cannot be too large, otherwise it will be difficult to push open the anti-inflation self-closing valve core 3 by the pressure regulator, or it will cause overpressure fatigue failure of the valve core seal. Therefore, the elastic force of the return spring 4 generally only needs to meet the reset requirement and the basic sealing force of the valve core seal. Optionally, the return spring 4 can be an ordinary cylindrical compression spring, a pagoda spring, or a spring with other structures, as long as it can meet the requirements described above.

[0112] The main function of the locking nut 5 is to support and limit the return spring, so that during the inflation or use of the valve, parts such as the anti-inflation self-closing valve core 3 will not fall out of the valve core cavity of the valve body 2.5.2. There are upper and lower through holes in the middle of the locking nut 5 for air inlet and outlet. Optionally, the matching part between the outside of the locking nut 5 and the valve body can be threaded, or it can be pressed into the valve body connection by interference fit. If the valve body is connected by thread, its end face can be processed with an internal hexagon or a slotted head for easy screwing. Preferably, the locking nut 5 is connected to the valve body by thread, and an internal hexagon is processed in the middle for easy screwing.

[0113] The main function of the sedimentation tube 6 is to prevent particulate pollutants in the gas cylinder from entering the interior of the valve when cleaning the residual liquid in the gas cylinder and damaging the seal of the valve. The sedimentation tube 6 can be connected to the valve body through an opening slot or made into a threaded interface for connection to the valve body. When the gas and the gas cylinder are relatively clean, the sedimentation tube 6 can also be omitted. Preferably, the sedimentation tube 6 is connected to the valve body 1 through an opening slot. If the user does not require it or when the gas and the gas cylinder are relatively clean, the sedimentation tube 6 can also not be installed.

[0114] Figure 8 The structural schematic diagram of the anti-filling lock core according to the first embodiment of the present invention is shown. The anti-filling lock core includes: a lock core fixing frame 7.1, a lock core seal 7.2, a lock core body 7.3, a limit pin 7.4, a limit pin spring 7.5, a lock pin 7.6, a lock pin spring 7.7, a seal pin 7.8, and a seal pin spring 7.9.

[0115] Figure 9 The structural schematic diagram of the lock core fixing frame according to the first embodiment of the present invention is shown. The lock core fixing frame includes a limit groove 7.1.1, a lock hole 7.1.2, an outer wall 7.1.3, an inner hole 7.1.4, and a positioning end face 7.1.5. Among them, the limit groove 7.1.1 can be one or more, and the shape is a fan-shaped notch. Its quantity and shape are determined by the configuration of the limit pin 7.4 and the rotation angle of the lock core body 7.3 to be restricted. Preferably, the number of limit pins 7.4 is two, and the restricted rotation angle is 90°; the number of limit grooves 7.1.1 is two, symmetrically distributed on the lock core fixing frame 7.1, and the fan-shaped notch angle is 90°. Optionally, the lock hole can be one or more. Preferably, the shape is circular, and it can be arranged linearly in a plane or distributed in a staggered manner within 360 degrees of the circumference. The lock hole is preferably three circular holes, arranged linearly in a plane, and its function is to accommodate the lock pin 7.6 when the lock core body 7.3 drives the lock pin 7.6 to rotate to its corresponding position, thereby restricting the rotation of the lock core body. The outer wall 7.1.3 is tightly connected to the lock core installation cavity 2.4.6 of the valve body. After the lock core fixing frame 7.1 is installed in the lock core installation cavity 2.4.6, it cannot move or rotate. Optionally, it can be connected by interference fit, riveting, or bonding with strong glue, as long as it forms a tight connection with the valve body after being installed in the valve core cavity of the valve body. Preferably, the matching method between the outer wall 7.1.3 and the lock core installation cavity 2.4.6 of the valve body is interference fit connection.

[0116] The function of the lock core seal 7.2 is to form a seal between the lock core body and the lock core cavity of the valve body, so that the gas inside the valve body will not leak out to the outside of the valve through the lock core. Its material can be elastic rubber or other elastic sealing materials, and its shape can be an O-ring, a star-shaped ring, or other structures. As long as it can achieve the sealing effect between the lock core body and the lock core cavity of the valve body, it is within the protection scope of the present invention. The lock core seal 7.2 is preferably an O-ring.

[0117] Figure 10 The structural schematic diagram of the lock core body according to the first embodiment of the present invention is shown. It includes a lock pin hole 7.3.1, a limit pin hole 7.3.2, a flow guide groove 7.3.3, a key hole 7.3.4, a knob position 7.3.5, a sealing surface 7.3.6 and a sealing pin hole 7.3.7. The lock pin hole 7.3.1 can be, optionally, one, two or more, and can be distributed in a row or circumferentially. Its main function is to accommodate the lock pin and the lock pin spring, so that the lock pin can move flexibly under the action of the lock pin spring. The limit pin hole 7.3.2 can be, optionally, one, two or more, and can be distributed in a row or circumferentially. Its main function is to accommodate the limit pin and the limit pin spring, so that the limit pin can move flexibly under the action of the limit pin spring. The flow guide groove 7.3.3 is located at the front end of the lock core body 7.3. Optionally, its shape can be a groove shape, a single-slot shape, a kidney-shaped groove or other shapes. Its function is to connect the air inlet hole 2.4.4 and the inflation hole 2.4.5 at the bottom of the lock core cavity of the valve body during filling by rotating the lock core body 7.3, and has a sufficient passage diameter to meet the filling requirements. The flow guide groove 7.3.3 is preferably a kidney-shaped groove. The key hole 7.3.4 is a circular optical hole, and the orifice surface can be chamfered to facilitate the insertion of the key. The knob position 7.3.5 can be, optionally, triangular, square or other shapes. The knob position 7.3.5 can be, optionally, convex or concave, as long as it can facilitate the key to apply torque to the lock core body to rotate the lock core body. The main function of the knob position 7.3.5 is to allow the key to apply torque to the lock core body to rotate the lock core body, and it can be located at the bottom of the key hole, the top of the key hole or other positions of the lock core body. The knob position 7.3.5 is preferably a triangular groove. The main function of the sealing surface 7.3.6 is to produce a sealing effect with the lock core seal, so that gas cannot leak out of the valve through the valve core. Optionally, it can be a smooth cylindrical surface, an annular groove or other shapes. The sealing surface 7.3.6 can be located at the front end, the rear end or other positions of the lock core body, as long as it can produce a sealing effect with the lock core seal, so that gas cannot leak out of the valve through the valve core. The sealing surface 7.3.6 is preferably a smooth cylindrical surface located at the rear end of the lock core body. The sealing pin hole 7.3.7 can accommodate the sealing pin 7.8 and the sealing pin spring 7.9, and the sealing pin 7.8 and the sealing pin spring 7.9 can move in and out freely therein.

[0118] When the lock core is required to be non-removable, the limit pin 7.4 is preferably made of a non-magnetic or weakly magnetic material to ensure that it will not retract into the limit pin hole on the lock core body under the action of an external magnetic field. When the lock core is required to be removable, the limit pin 7.4 can be made of a permanent magnet material to retract into the limit pin hole on the lock core body under the action of an external magnetic field. The material of the limit pin 7.4 should have sufficient strength and will not be cut off when restricting the movement of the lock core body. The outside of the limit pin 7.4 has a clearance fit with the limit pin hole 7.3.2, so that the limit pin 7.4 can move freely in the pin hole 7.3.2. The position and number of the limit pins 7.4 can be adjusted with the change of the limit pin holes, and preferably two, symmetrically distributed along the circumference.

[0119] The main function of the limit pin spring 7.5 is to push the limit pin 7.4 to the required position and keep the limit pin 7.4 from easily retracting into the limit pin hole at this position.

[0120] The lock pin 7.6 can be made of a magnetic material or a permanent magnet material, or both a magnetic material and a permanent magnet material can be used at the same time. The outside of the lock pin 7.6 has a clearance fit with the lock pin hole 7.3.1, so that the lock pin 7.6 can move easily in the lock pin hole. The lock pin 7.6 can be one, two or more, and can be distributed in a row or circumferentially. Preferably, 3 lock pins are distributed in a row.

[0121] The main function of the lock pin spring 7.7 is to push the lock pin 7.6 to the required position and keep the lock pin 7.6 from easily retracting into the lock pin hole at this position.

[0122] The shape of the sealing pin 7.8 can be a cylinder, a sphere or other shapes, as long as it can produce a sealing and current-limiting effect when it is in the valve body inflation hole 2.4.5, it is within the protection scope of this invention patent. The shape of the sealing pin 7.8 is preferably a cylinder with a spherical end face. The sealing pin 7.8 can be completely retracted into the sealing pin hole 7.3.7 of the lock core body 7.3 and can be pushed out of the sealing pin hole 7.3.7 under the action of the sealing pin spring 7.9.

[0123] The function of the sealing pin spring 7.9 is to provide a stable and continuous thrust for the sealing pin 7.8, so that the sealing pin 7.8 can fit better with the inflation port surface when it falls into the valve body inflation hole 2.4.5.

[0124] When the locking pin 7.6 retracts into the locking pin hole 7.3.1, the lock core body 7.3 of the anti-inflation lock core 7 can rotate within the lock core fixing bracket 7.1. When the lock core body 7.3 rotates, it drives the limit pin 7.4 to rotate. When the limit pin 7.4 touches the limit groove 7.1.1 on the lock core fixing bracket 7.1, since the lock core fixing bracket 7.1 is tightly connected to the lock core cavity 2.4 of the valve body, the limit groove 7.1.1 will hinder the movement of the limit pin 7.4, and thus hinder the rotation of the valve core body 7.3. In this way, the rotation of the valve core body 7.3 can be restricted within the angle of the limit groove 7.1.1. At the same time, when the valve core body 7.3 is pulled out of the lock core fixing bracket 7.1, the limit pin 7.4 will also be hindered by the lock core fixing bracket 7.1, so that the translational movement of the valve core body can also be restricted, ensuring that the lock core body 7.3 will not be pulled out of the lock core fixing bracket 7.1. When the locking pin 7.6 retracts into the locking pin hole 7.3.1, the rotation of the lock core body 7.3 within the lock core fixing bracket 7.1 will drive the locking pin 7.6 to rotate together. When the locking pin 7.6 rotates to the position of the lock hole 7.1.2 on the lock core fixing bracket 7.1, the locking pin will enter the lock hole 7.1.2 under the push of the locking pin spring 7.7 of the locking pin 7.6, and the lock core body 7.3 will not be able to continue rotating. When the lock core body 7.3 rotates, it will drive the sealing pin 7.8 and the sealing pin spring 7.9 to rotate together. When its rotation drives the sealing pin 7.8 to be directly above the air inlet hole 2.4.5 of the valve body, the sealing pin 7.8 fits against the orifice surface of the air inlet hole 2.4.5 under the push of the sealing pin spring 7.9. In this state, if air is inflated, the pressure of the gas will make the sealing pin 7.8 fit more tightly against the orifice surface of the air inlet hole 2.4.5, thus achieving the purpose of preventing the valve from being inflated (such as Figure 12 the anti-inflation state). When the lock core body 7.3 rotates, the sealing pin 7.8 will be squeezed and retract into the sealing pin hole 7.3.7 of the lock core body 7.3, and continue to rotate until the sealing pin 7.8 leaves directly above the air inlet hole 2.4.5 of the valve body. By rotating, the diversion groove 7.3.3 of the lock core body 7.3 is located directly above the air inlet hole 2.4.5 of the valve body. At this time, the diversion groove 7.3.3 connects the air inlet hole 2.4.4 and the air inlet hole 2.4.5 of the valve body. After the gas enters through the air inlet hole 2.4.4, it enters the air inlet hole 2.4.5 through the diversion groove, and then bypasses the anti-inflation restriction of the anti-inflation core 3.3 through the air inlet hole 3.5.3 of the lower valve core 3.5, achieving the purpose of normal inflation of the valve (such as Figure 12 the normal inflation state shown).

[0125] The retaining ring 8 can be a wire retaining ring, or a hole-type elastic retaining ring or other retaining rings. Its main function is to prevent damage to the valve caused by disassembling and unlocking the lock core. In addition, it also has the functions of preventing the internal structure of the lock core from failing and preventing the lock core from being pulled out of the valve body. The retaining ring 8 is installed in the retaining ring groove 2.4.1 of the lock core cavity 2.4 of the valve body. Preferably, an elastic retaining ring is selected as the retaining ring 8;

[0126] The main body of the protective sleeve 9 is a cylindrical shell structure with one end closed (such asFigure 19 ) The closed end has a through hole in the middle, and the size of the through hole allows a key to pass through. The protective sleeve 9 is sleeved on the valve body protective sleeve installation position 2.4.7 and firmly connected. Its main function is to protect the lock core and prevent the lock core from being disassembled.

[0127] Figure 11 Fig. shows a schematic structural diagram of the key according to the first embodiment of the present invention. The key 10 includes: a magnetic core 10.1, a knob head 10.2, and a key handle 10.3. The number and position angles of the magnetic cores 10.1 correspond one by one to the lock pins 7.6 of the anti-charging lock core, and there is a magnetic attraction force between the magnetic cores and the lock pins at the corresponding positions. Preferably, three magnetic cores are distributed in a row.

[0128] The shape and structure of the knob head 10.2 are matched with the knob position 7.3.5 on the lock core body. When combined with the knob position 7.3.5, turning the key can drive the lock core body to rotate. Preferably, the structure of the knob head 10.2 is a triangular prism. The main function of the key handle 10.3 is to facilitate the rotation of the key. There are holes on the key handle 10.3 to facilitate threading a rope through the key to prevent it from being lost.

[0129] When the key 10 is correctly inserted into the lock core hole 7.3.4 of the anti-charging lock core 7, the magnetic cores 10.1 of the lock pins interact with the magnetic field of the lock pins of the anti-charging lock core 7, attracting the lock pins to disengage from the lock hole and retract into the lock pin holes. The knob head 10.2 of the key is matched with the knob position 7.3.5 of the anti-charging lock core 7. At this time, turning the key can drive the lock core body to rotate, and by rotating the lock core body, the normal inflation and anti-inflation functions of the valve can be realized.

[0130] Figure 12 Fig. shows a schematic structural diagram of the use state according to the first embodiment of the present invention. The anti-charging self-closing valve core is installed in the valve body valve core cavity. When the valve is in the closed state, the valve core seal and the upper sealing surface of the valve body valve core cavity are attached and sealed under the thrust of the return spring, realizing the self-closing function, such as Figure 12 "normal closed state". When the valve is in the anti-charging state, the anti-charging valve core is pushed open by the inflation gun, and the valve core seal and the upper sealing surface of the valve core cavity are separated, and gas can enter the valve body valve core cavity through here. When the gas wants to continue to enter the gas cylinder through the anti-charging valve core, under the action of the gas pressure, the sealing surface of the anti-charging core will tightly fit the lower valve core to form a sealing surface, and the gas cannot enter the gas cylinder through here. Also, because there is an anti-charging seal between the anti-charging self-closing valve core and the valve body valve core cavity, at this time, the gas cannot enter the gas cylinder through the anti-charging valve core, realizing the anti-charging function, such as Figure 12"Anti-inflation state". When the valve is in normal use, the anti-inflation self-closing valve core is pushed open by the pressure regulator, the seal of the valve core and the upper sealing surface of the valve core cavity are separated. When the gas passes through the anti-inflation valve core from the gas cylinder through the anti-inflation core, under the action of the gas pressure difference, the sealing surface of the anti-inflation core leaves the lower valve core, and the anti-inflation core no longer has a sealing function. The gas flows out through the air holes of the anti-inflation valve core and enters the air outlet of the valve body to achieve normal gas use, as Figure 12 "Normal gas use state". The anti-inflation self-closing valve core is equivalent to adding a one-way valve on the basis of the traditional self-closing valve core, preventing inflation through the traditional self-closing valve core and only allowing gas to be released or used externally through the traditional self-closing valve core. If inflation is required, it can be achieved through the following preferred methods: a. Open another channel for inflation to bypass the anti-inflation core during inflation; b. During inflation, make the anti-inflation core leave the anti-inflation sealing surface so that it cannot be sealed during inflation and the anti-inflation function of the anti-inflation core fails. In the first embodiment of the present invention, method a is selected, and another channel is opened for inflation to bypass the anti-inflation core during inflation, as Figure 12 "Normal inflation state".

[0131] The following describes the second embodiment in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0132] See Figure 13 、 14 shows the structure of the self-closing bottle valve with anti-theft inflation function according to the second embodiment of the present invention. The self-closing bottle valve includes: valve body seal 1, valve body 2a, anti-inflation self-closing valve core 3a, return spring 4, locking nut 5, sedimentation tube 6, anti-inflation lock core 7a, retaining ring 8, protective sleeve 9, key 10 and other features.

[0133] Figure 15 shows the schematic structural diagram of the valve body according to the second embodiment of the present invention. The same or similar numbers in this application represent similar components. The valve body 2a in the second embodiment of the present invention includes: shaft hole 2a.4.4, the shaft hole 2a.4.4 located at the bottom of the lock core cavity 2a.4, and the shaft hole 2a.4.4 communicates with the valve core cavity 2.5.

[0134] Figure 16 shows the schematic structural diagram of the anti-inflation self-closing valve core according to the second embodiment of the present invention. The anti-inflation self-closing valve core 3a includes: valve core seal 3.1, upper valve core 3a.2, anti-inflation core 3a.3, anti-inflation seal 3a.4, lower valve core 3a.5 and anti-inflation core return spring 3a.6.

[0135] Figure 17The structural schematic diagram of the upper spool valve of the second embodiment of the present invention is shown. The upper spool valve 3a.2 includes: a top core 3a.2.1, a spool valve seal mounting groove 3a.2.2, a ventilation groove 3a.2.3, and a guide hole 3a.2.4. The top core 3a.2.1 is located above the upper spool valve. Below the top core 3a.2.1 is the spool valve seal mounting groove 3a.2.2, which is used to mount the spool valve seal 3.1. The ventilation groove 3a.2.3 can be a special-shaped notch or a flat notch, and the number is one or more, evenly distributed along the circumference. Preferably, there are 4 flat notches. The guide hole 3a.2.4 is located at the bottom of the upper spool valve 3a.2, and its main function is to accommodate and limit the movement of the anti-filling core 3a.3.

[0136] Figure 18 The structural schematic diagram of the anti-filling core of the second embodiment of the present invention is shown. The anti-filling core 3a.3 includes a spring hole 3a.3.1, a limit groove 3a.3.2, a sealing head 3a.3.3, and a guide surface 3a.3.4. The material of the anti-filling core 3a.3 can be optionally non-magnetic materials such as copper, aluminum, hard plastic, and stainless steel to prevent the external applied magnetic field from exerting a force on it. Preferably, it is hard plastic.

[0137] The spring hole 3a.3.1 accommodates the anti-filling core return spring 3a.6, and the anti-filling core return spring 3a.6 can freely compress and move in the spring hole. The limit groove 3a.3.2 is an annular groove, which can limit the upper and lower movement limit positions of the anti-filling core 3a.3 in the anti-filling self-closing spool valve 3a through the upper and lower surfaces of the groove. The end surface of the sealing head 3a.3.3 can be optionally a spherical head, a flat surface, or other structures. The sealing head 3a.3.3 can produce a sealing effect when it is in contact with the sealing surface 3a.5.1 of the lower spool valve 3a.5. The end surface of the sealing head 3a.3.3 is preferably a smooth flat surface. The guide surface 3a.3.4 is a smooth cylindrical surface with a chamfer at the upper part.

[0138] The shape of the anti-filling seal 3a.4 is a rotating body, and it can be made of an elastic sealing material or plastic. The anti-filling seal 3a.4 is installed in the anti-filling seal mounting groove of the lower spool valve 3a.5. The small clearance fit between the outer ring of the anti-filling seal 3a.4 and the valve body spool valve cavity not only plays a guiding role but also can limit the flow rate to achieve the anti-filling seal effect. The anti-filling seal 3a.4 is preferably an O-ring made of rubber material.

[0139] Figure 19The structural schematic diagram of the lower valve core of the second embodiment of the present invention is shown. The lower valve core 3a.5 includes a sealing surface 3a.5.1, a middle through hole 3a.5.2, an air hole 3a.5.3, a return spring fixing groove 3a.5.4, an anti-filling seal mounting groove 3a.5.5, a guiding surface 3a.5.6, and a limiting groove 3a.5.7. When the anti-filling core 3a.3 drops, the sealing surface 3a.5.1 can produce a sealing effect with the anti-filling core 3a.3. The structure of the sealing surface 3a.5.1 is determined according to the structure of the anti-filling core 3a.3, and preferably it is a sharp-angle sealing surface. The middle through hole 3a.5.2 is located in the middle of the lower valve core 3a.5 and communicates the upper and lower parts of the lower valve core 3a.5. The air hole 3a.5.3 is located above the anti-filling seal mounting groove 3a.5.5, and it can be one or more. If there are multiple ones, they are evenly distributed on the circumference of the lower valve core 3a.5. The diameter of the air hole 3a.5.3 is greater than or equal to the designed diameter of the valve. The air hole 3a.5.3 is partially communicated with the middle through hole 3a.5.2 on the sealing surface 3a.5.1. Preferably, the air hole 3a.5.3 is 4 holes evenly distributed along the circumference. In Figure 19 Among them, two holes are cut off by the limiting groove 3a.5.7, so they are shown as semi-holes in the figure. The main function of the return spring fixing groove 3a.5.4 is to provide positioning for the return spring to prevent frictional interference between the return spring and the valve body. The structure of the anti-filling seal mounting groove 3a.5.5 is a rotary groove for accommodating and mounting the anti-filling seal 3a.4. The guiding surface 3a.5.6 has a clearance fit with the valve core cavity of the valve body and plays a guiding role. The limiting groove 3a.5.7 is located above the anti-filling seal mounting groove 3a.5.5 and penetrates the outer circle of the upper part of the lower valve core 3a.5. It can be one or more, and preferably it is two symmetrically distributed limiting grooves.

[0140] Figure 20 The structural schematic diagram of the anti-filling lock core of the second embodiment of the present invention is shown. The anti-filling lock core 7a includes: a lock core fixing frame 7.1, a lock core seal 7.2, a lock core body 7a.3, a limit pin 7.4, a limit pin spring 7.5, a lock pin 7.6, and a lock pin 7.6 spring. The components with the same numbers as those of the anti-filling lock core 7 in the first embodiment of the present invention are the same or similar, and the relevant content in this embodiment will not be described again.

[0141] Figure 21 The structural schematic diagram of the lock core body of the second embodiment of the present invention is shown. The lock core body 7a.3 includes a lock pin hole 7.3.1, a limit pin hole 7.3.2, a limit shaft 7a.3.3, a key hole 7.3.4, a knob position 7.3.5, and a sealing surface 7.3.6.

[0142] The limit shaft 7a.3.3 is located at the front end of the lock core body 7a.3. The front end shape of the limit shaft 7a.3.3 can be optionally cam-shaped, elliptical, trimmed circular or other shapes. The main function of the front end of the limit shaft 7a.3.3 is to limit the moving position of the anti-filling core 3a.3 of the anti-filling self-closing valve core 3a through the height change from its outer edge to its rotation center during the process of rotating the lock core body 7a.3 to drive its rotation. The head of the limit shaft 7a.3.3 is preferably trimmed circular.

[0143] When the lock pin 7.6 retracts into the lock pin hole 7.3.1, the lock core body 7a.3 of the anti-filling lock core 7a can rotate within the lock core fixing bracket 7.1. When the lock core body 7a.3 rotates, it drives the limit pin 7.4 to rotate. When the limit pin 7.4 touches the limit groove 7.1.1 on the lock core fixing bracket 7.1, since the lock core fixing bracket 7.1 is fixedly connected to the valve body lock core cavity 2a.4, the limit groove 7.1.1 will hinder the movement of the limit pin 7.4, and thus hinder the rotation of the valve core body 7a.3. In this way, the rotation of the valve core body 7a.3 can be limited within the angle of the limit groove 7.1.1. When the valve core body 7a.3 is pulled out of the lock core fixing bracket 7.1, the limit pin 7.4 will also be hindered by the lock core fixing bracket 7.1, so that the translational movement of the valve core body can also be limited, ensuring that the lock core body 7a.3 will not be pulled out of the lock core fixing bracket 7.1. When the lock pin 7.6 retracts into the lock pin hole 7.3.1, the rotation of the lock core body 7a.3 within the lock core fixing bracket 7.1 will drive the lock pin 7.6 to rotate together. When the lock pin 7.6 rotates to the position of the lock hole 7.1.2 on the lock core fixing bracket 7.1, the lock pin will enter the lock hole 7.1.2 under the push of the lock pin spring 7.7, and the lock core body 7a.3 will not be able to rotate further. When the lock core body 7a.3 rotates, it will drive the limit shaft 7a.3.3 to rotate together. When the cut plane of the head of the limit shaft 7a.3.3 is upward, in this state, if inflated, it does not limit the movement of the anti-filling core 3a.3 of the anti-filling self-closing valve core 3a, thus achieving the purpose of preventing the valve from being inflated (such as Figure 22 the anti-inflation state). When the lock core body 7a.3 rotates, it will drive the limit shaft 7a.3.3 to rotate together. When the cylindrical surface of the head of the limit shaft 7a.3.3 is upward, in this state, if inflated, the movement of the anti-filling core 3a.3 of the anti-filling self-closing valve core 3a will be restricted and cannot fall onto the sealing surface 3a.5.1 of the lower valve core 3a.5, and it cannot be sealed during inflation, achieving the purpose of normal inflation of the valve (such as Figure 22 the normal inflation state).

[0144] The key 10 is correctly inserted into the keyhole 7.3.4 of the anti-filling lock core 7a. The magnetic core 10.1 of the lock pin interacts with the magnetic field of the lock pin of the anti-filling lock core 7, attracting the lock pin to disengage from the lock hole and retract into the lock pin hole. The knob head 10.2 of the key cooperates with the knob position 7.3.5 of the anti-filling lock core 7. At this time, the key can be rotated to drive the lock core body to rotate, and the normal inflation and anti-inflation functions of the valve can be realized by rotating the lock core body.

[0145] Figure 22 The schematic diagram of the usage state of the second embodiment of the present invention is shown. The anti-filling self-closing valve core 3a is installed in the valve body valve core cavity. When the valve is in the closed state, the valve core seal 3.1 and the valve body seal surface 2.5.1 are fitted and sealed under the thrust of the return spring 5, realizing the self-closing function, as Figure 22 "normal closed state". When the valve is in the anti-filling state, the anti-filling self-closing valve core 3a is pushed open by the inflation gun, and the valve core seal 3.1 and the valve body seal surface 2.5.1 are separated. Then the gas can enter the valve body valve core cavity. When the gas needs to continue to enter the gas cylinder through the lower valve core 3a.5, under the action of the gas pressure, the sealing surface 3a.5.1 between the anti-filling core 3a.3 and the lower valve core 3a.5 will be tightly fitted to form a seal, and the gas cannot enter the gas cylinder. And there is an anti-filling seal 3a.4 between the lower valve core 3a.5 and the valve body valve core cavity. At this time, the gas cannot enter the gas cylinder through the anti-filling valve core, realizing the anti-filling function, as Figure 22 "anti-inflation state". When the valve is in normal use, the anti-filling self-closing valve core 3a is pushed open by the pressure regulator, and the valve core seal 3.1 and the valve body seal surface 2.5.1 are separated. When the gas flows from the gas cylinder through the lower valve core 3a.5 and through the anti-filling core 3a.3, the anti-filling core 3a.3 overcomes the elastic force of the anti-filling core return spring 3a.6 under the gas pressure, so that the sealing head of the anti-filling core 3a.3 leaves the sealing surface of the lower valve core 3a.5, and the gas flows out through the middle through hole 3a.5.2 of the lower valve core 3a.5 and enters the valve body air outlet through the air hole 3a.5.3, realizing normal gas use, as Figure 11 "normal gas use state". The anti-filling self-closing valve core 3a is equivalent to adding a check valve on the basis of the traditional self-closing valve core, preventing inflation through it and only allowing gas to be released or used externally through it. If inflation is needed, it can be achieved in the following ways: a. Open another channel for inflation to bypass the anti-filling core during inflation; b. During inflation, make the anti-filling core leave the anti-filling sealing surface, so that it cannot be sealed during inflation and the anti-filling function of the anti-filling core fails. The second embodiment of the present invention selects method b. During inflation, make the anti-filling core leave the anti-filling sealing surface, so that it cannot be sealed during inflation and the anti-filling function of the anti-filling core fails, as Figure 22 "normal inflation state". As long as the method can make the anti-filling core leave the anti-filling sealing surface during inflation, so that it cannot be sealed during inflation and the anti-filling function of the anti-filling core fails, it falls within the protection scope of this invention patent.

[0146] Features with the same number are consistent, and their protection scopes are also the same. Their content will not be described again.

[0147] In order to better understand the technical solution of this application, a specific example will be used for illustration below. The details listed in this example are mainly for easy understanding and do not limit the protection scope of this application.

[0148] The present invention provides a self-closing bottle valve with overcurrent cut-off, including a valve body seal, a valve body, an anti-filling self-closing valve core, a return spring, a locking nut, a sedimentation tube, an anti-filling lock core, a retaining ring, a protective sleeve, and a key.

[0149] The valve body includes: a gas cylinder interface, a wrench square body, an air outlet, a lock core cavity, and a valve core cavity. The gas cylinder interface is provided with a thread for connecting to the gas cylinder. The wrench square body is used for the wrench to tighten the valve on the gas cylinder. The air outlet is provided with a card slot for connecting to a pressure regulator. The valve body may also include a valve body seal groove for installing the valve body seal. The lock core cavity is provided with a card slot for installing the anti-filling lock core. The upper part of the valve core cavity is provided with a sealing surface, the middle part is provided with a cavity, the lower part is provided with a thread, and the lowermost part is provided with a card slot. The valve core cavity and the air outlet are connected by a small hole, and the lock core cavity is provided with a hole for communicating with the valve core cavity.

[0150] The anti-filling self-closing valve core includes: a valve core seal, an upper valve core, an anti-filling core, an anti-filling seal, and a lower valve core. The upper valve core is provided with a top core and a valve core seal installation groove. The valve core seal is installed in the valve core seal installation groove and is made of an elastic sealing material. The anti-filling core is made of a non-magnetic material such as copper, aluminum, or hard plastic to prevent the external applied magnetic field from exerting a force on it. When the valve is inflated, the sealing surface of the anti-filling core and the lower valve core form a seal; when the valve is in normal use, the sealing surface of the anti-filling core and the lower valve core do not form a seal to achieve the anti-filling effect. The anti-filling seal can be made of an elastic sealing material or plastic. The outer ring and the valve core cavity of the valve body are in small clearance fit, which not only plays a guiding role but also limits the flow rate to achieve the anti-filling seal effect. The lower valve core includes an anti-filling sealing surface and a spring groove.

[0151] The anti-filling self-closing valve core is installed in the valve core cavity of the valve body. When the valve is in the closed state, the valve core seal and the upper sealing surface of the valve body valve core cavity are pressed together by the thrust of the return spring to achieve the self-closing function. When the valve is in the anti-filling state, the anti-filling valve core is pushed open by the inflation gun, the valve core seal and the upper sealing surface of the valve core cavity are separated, and gas can enter the valve body valve core cavity through here. When the gas wants to continue to enter the gas cylinder through the anti-filling valve core, under the action of the gas pressure, the sealing surface of the anti-filling core will tightly fit the lower valve core to form a sealing surface, and the gas cannot enter the gas cylinder. Also, because there is an anti-filling seal between the anti-filling self-closing valve core and the valve body valve core cavity, at this time the gas cannot enter the gas cylinder through the anti-filling valve core, thus achieving the anti-filling function. When the valve is in normal use, the anti-filling self-closing valve core is pushed open by the pressure regulator, the valve core seal and the upper sealing surface of the valve core cavity are separated. When the gas flows from the gas cylinder through the anti-filling valve core and passes through the anti-filling core, the sealing surface of the anti-filling core leaves the lower valve core under the action of the gas pressure difference, and the anti-filling core no longer has a sealing effect. The gas flows out through the air holes of the anti-filling valve core and enters the air outlet of the valve body to realize normal gas use. The anti-filling self-closing valve core is equivalent to adding a one-way valve on the basis of the traditional self-closing valve core to prevent inflation and can only release gas or use gas outward. If inflation is needed, it can be achieved through the following preferred methods: a. Open another channel for inflation to bypass the anti-filling core during inflation; b. During inflation, make the anti-filling core leave the anti-filling sealing surface, and it cannot be sealed during inflation, and the anti-filling function of the anti-filling core fails.

[0152] The main function of the return spring is to help the anti-filling self-closing valve core reset, so that when there is no external force to push it open, the anti-filling self-closing valve core is pushed to make the valve core seal fit with the inner cavity sealing surface of the valve body in a sealed state. However, the elastic force of the return spring should not be too large, so that it is difficult for the pressure regulator to push open the anti-filling self-closing valve core, or cause overpressure fatigue failure of the valve core seal. Therefore, the elastic force of the return spring generally only needs to meet the reset requirements and the basic sealing force of the valve core seal. The return spring can be a common cylindrical compression spring, a pagoda spring or other springs, as long as it can meet the requirements mentioned above.

[0153] The main function of the lock nut is to support and limit the return spring, so that during the inflation or use of the valve, parts such as the anti-filling self-closing valve core do not come out of the valve body valve core cavity. There are air holes in the middle of the lock nut for air inlet and outlet. The mating part between the outside of the lock nut and the valve body can be a thread or can be pressed into the valve body for connection by an interference fit method. If the valve body is connected by a thread, the end face of the lock nut can be machined with an internal hexagon or a slotted head for easy screwing.

[0154] The main function of the sedimentation tube is to prevent particulate pollutants in the gas cylinder from entering the inside of the bottle valve and damaging the seal of the bottle valve when cleaning the residual liquid in the gas cylinder. The sedimentation tube can be connected to the valve body through an open slot or can be made into a threaded interface to connect to the valve body. When the gas and the gas cylinder are relatively clean, the sedimentation tube can also not be set.

[0155] The anti-charging lock core includes: a lock core fixing bracket, a lock core seal, a lock core body, a limit pin, a limit pin spring, a lock pin, and a lock pin spring.

[0156] The lock core fixing bracket is provided with a limit groove and a lock hole. The function of the limit groove is to restrict the rotation and movement of the lock core body. The function of the lock hole is to accommodate the lock pin after the lock pin spring resets the lock pin and restrict the movement of the lock core body. The outside of the lock core fixing bracket is tightly connected to the lock core cavity of the valve body. After the lock core fixing bracket is installed in the lock core cavity of the valve body, it cannot move or rotate. The lock core fixing bracket and the lock core cavity of the valve body can be connected by interference fit, riveting, or strong glue bonding, as long as it forms a tight connection with the valve body after being installed in the valve core cavity of the valve body.

[0157] The function of the lock core seal is to form a seal between the lock core body and the lock core cavity of the valve body, so that the gas inside the valve body will not leak out to the outside of the valve through the lock core. The material of the lock core seal can be elastic rubber or other elastic sealing materials. The shape of the lock core seal can be an O-ring, a star-shaped ring, or other structures. As long as it can achieve the sealing function between the lock core body and the lock core cavity of the valve body, it is within the protection scope of the present invention.

[0158] The lock core body is provided with a lock pin hole, a limit pin hole, a key hole, a knob position, and a sealing surface. The number of lock pin holes can be one, two, or more, and can be distributed in a row or circumferentially. The main function of the lock pin hole is to accommodate the lock pin and the lock pin spring, so that the lock pin can move flexibly under the action of the lock pin spring. The number of limit pin holes can be one, two, or more, and can be distributed in a row or circumferentially. The main function of the limit pin hole is to accommodate the limit pin and the limit spring, so that the limit pin can move flexibly under the action of the limit pin spring. The key hole is a round hole without any feature points inside, which is a smooth hole, and the orifice can be chamfered to facilitate the insertion of the key. The main function of the knob position is to allow the key to apply torque to the lock core body and rotate the lock core body. The knob position can be located at the bottom of the key hole, the top of the key hole, or other positions of the lock core body. The knob position can be triangular, square, or other shapes, and can be a protrusion or a depression, as long as it can facilitate the key to apply torque to the lock core body and rotate the lock core body. The main function of the sealing surface is to generate a sealing effect with the lock core seal, so that the gas cannot leak out of the valve through the valve core. The sealing surface can be a smooth cylindrical surface, an annular groove, or other shaped grooves, and can be located at the front end of the lock core body, the rear end of the lock core body, or other positions of the lock core body, as long as it can generate a sealing effect with the lock core seal and prevent the gas from leaking out of the valve through the valve core.

[0159] When the lock core is required to be non-removable, the limit pin is preferably made of non-magnetic or weakly magnetic material so that it will not retract into the limit pin hole on the lock core body under the action of an external magnetic field. When the lock core is required to be removable, the limit pin can use permanent magnetic material and can retract into the limit pin hole on the lock core body under the action of an external magnetic field. The material of the limit pin should have sufficient strength and will not be cut off when restricting the movement of the lock core body. The outside of the limit pin is in clearance fit with the limit pin hole so that the limit pin can move freely in the pin hole. The position and number of the limit pins can be adjusted according to the change of the limit pin holes.

[0160] The main function of the limit pin spring is to push the limit pin to the required position and keep the limit pin from easily retracting into the limit pin hole when in the required position.

[0161] The lock pin can be made of magnetic material, permanent magnet material, or both magnetic material and permanent magnet material at the same time. An external magnetic field is applied to force the lock pin to move. The outside of the lock pin is in clearance fit with the lock pin hole so that the lock pin can move freely in the lock pin hole. The position and number of the lock pins can be adjusted according to the change of the lock pin holes. The main function of the lock pin spring is to push the lock pin to the required position and keep the limit pin from easily retracting into the lock pin hole when in the required position.

[0162] The key includes: a magnetic core, a knob head, and a key handle. The number and position angle of the magnetic cores correspond one by one to the lock pins of the anti-charge lock core, and there is a magnetic attraction force between the magnetic cores and the lock pins at the corresponding positions. The shape and structure of the knob head cooperate with the knob position on the lock core body. When combined with the knob position, turning the key can drive the lock core body to rotate. The main function of the key handle is to facilitate the rotation of the key. There are holes on the key handle to facilitate threading a rope through the key to prevent it from being lost.

[0163] When the lock pin retracts into the lock pin hole, the lock core body of the anti-charge lock core can rotate in the lock core fixing frame. When the lock core body rotates, it drives the limit pin to rotate. When the limit pin touches the limit groove on the lock core fixing frame, since the lock core fixing frame is tightly connected to the valve body spool cavity, the limit groove will hinder the movement of the limit pin, thereby hindering the rotation of the spool body. In this way, the rotation of the spool body can be restricted within a fixed angle. At the same time, if the spool body moves out of the lock core fixing frame, the limit pin will also be hindered by the lock core fixing frame, so that the translation of the spool body can be restricted, ensuring that the lock core body will not move out of the lock core fixing frame. When the lock pin retracts into the lock pin hole, the rotation of the lock core body in the lock core fixing frame will drive the lock pin to rotate together. When the lock pin rotates to the position of the lock hole on the lock core fixing frame, the lock pin will be pushed by the lock pin spring and inserted into the lock hole, and the lock core body will not be able to rotate further. When the key is inserted into the corresponding position in the lock core hole, the lock pin will interact with the magnetic field of the key, attracting the lock pin to disengage from the lock hole and retract into the lock pin hole. At this time, the key can be rotated to drive the lock core body to rotate.

[0164] In the foregoing text, "if inflation is required, it can be achieved through the following preferred methods: a. Open another passage for inflation to bypass the anti-inflation core when inflating; b. When inflating, move the anti-inflation core away from the anti-inflation sealing surface so that it cannot be sealed during inflation and the anti-inflation function of the anti-inflation core fails." When using method a and opening another passage for inflation, rotate the lock core body to open and close this passage, thereby realizing the opening and closing of the valve inflation function. When using method b, rotate the lock core body to move the anti-inflation core away from the anti-inflation sealing surface and make the anti-inflation function of the anti-inflation core fail, thereby realizing the opening and closing of the valve inflation function.

[0165] It should be noted that in the application documents of this patent, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one" does not exclude the existence of additional identical elements in the process, method, article or device including the said element. In the application documents of this patent, if it is mentioned that an act is performed according to a certain element, it means performing the act at least according to that element, including two cases: performing the act only according to that element and performing the act according to that element and other elements. Expressions such as multiple, many times, various, etc. include 2, 2 times, 2 types, as well as more than 2, more than 2 times, more than 2 types.

[0166] This specification includes combinations of various embodiments described herein. A separate reference to "an embodiment" or a specific embodiment, etc. does not necessarily refer to the same embodiment; however, unless indicated as mutually exclusive or clearly understood by those skilled in the art as mutually exclusive, these embodiments are not mutually exclusive. It should be noted that unless the context clearly indicates or requires otherwise, the word "or" is used in a non-exclusive sense in this specification.

[0167] All documents mentioned in this application are considered to be integrally included in the disclosure content of this application so that they can be used as a basis for modification when necessary. In addition, it should be understood that after reading the above disclosure content of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope of protection required by this application.

Claims

1. A self-closing bottle valve with anti-theft filling function, characterized in that: include: Valve body (2), anti-filling self-closing valve core (3) and anti-filling lock core (7); The valve body is provided with a lock core cavity (2.4), a valve core cavity (2.5) and an inflation flow channel for inflation; The anti-filling self-closing valve core is accommodated in the valve core cavity and is configured to prevent inflation; and when the anti-filling lock core is in a closed state, the inflation flow channel is blocked, thereby placing the self-closing bottle valve in an anti-theft filling state; and when the anti-filling lock core is in an open state, the inflation flow channel is opened, thereby placing the self-closing bottle valve in an inflation-allowing state; The anti-filling lock core (7) is configured to be opened or closed by a matching key (10), wherein the anti-filling lock core (7) is provided with one or more magnetic lock pins, and the key is provided with a magnetic core (10.1) corresponding to the magnetic lock pins. When the matching key is correctly inserted into the anti-filling lock core, the magnetic lock pins interact with the magnetic core, so that the anti-filling lock core is in an open state; when the anti-filling lock core is in a closed state and the matching key is removed from the anti-filling lock core, the magnetic lock pins are reset, so that the anti-filling lock core is in a closed state. When the anti-filling lock core (7) is in an open state, a bypass filling flow channel is formed by the rotation of the anti-filling lock core, thereby making the filling flow channel conductive; The anti-filling lock core (7) comprises a lock core seal (7.2), which is configured to form a seal between the lock core body and the lock core cavity so that the gas inside the valve body will not leak out to the outside of the valve through the lock core.

2. The self-closing bottle valve with anti-theft charging function according to claim 1, characterized in that, When the matching key is correctly inserted into the anti-filling lock core, the magnetic lock pin interacts with the magnetic core, so that the anti-filling lock core is in a waiting-to-open state, and the anti-filling lock core is driven to rotate by rotating the key, thereby turning the anti-filling lock core to an open state or a closed state.

3. The self-closing bottle valve with anti-theft charging function according to claim 1, characterized in that The lock core cavity includes a lock core installation cavity (2.4.6), an air inlet hole (2.4.4) and an air charging hole (2.4.5); The anti-filling lock core is accommodated in the lock core cavity, and the anti-filling lock core comprises a lock core body (7.3), N magnetic lock pins (7.6), and N lock pin springs (7.7); wherein N is a positive integer ≥1; The lock core body is provided with: N lock pin holes (7.3.1), the magnetic lock pin (7.6) and the lock pin spring (7.7) being accommodated in the corresponding lock holes and the lock pin holes, and in a closed state, the lock pin spring pushes the magnetic lock pin into the lock hole; a keyhole (7.3.4), the keyhole being configured to receive the key; A guide groove (7.3.3), wherein the guide groove (7.3.3) is configured to connect the air inlet and the inflation hole when the anti-inflation lock core is in an open state, thereby making the inflation flow channel conductive.

4. The self-closing bottle valve with anti-theft charging function according to claim 3, characterized in that, The lock core body is also provided with a limit pin hole (7.3.2); The limit pin hole is configured to accommodate a limit pin (7.4) and a limit pin spring (7.5), and the limit pin spring pushes the limit pin from the limit pin hole to the limit pin groove, so that the limit pin moves in the limit pin groove, thereby controlling the rotation range of the lock core body; The number of the limit pins (7.4) and the limit pin springs (7.5) is M, where M ≥ 1.

5. The self-closing bottle valve with anti-theft charging function according to claim 3, characterized in that, A knob position (7.3.5) is further provided on the lock core body, and the knob position is configured to correspond to a knob head (10.2) on the key, so that the key can drive the lock core body to rotate; The knob position is a convex or concave polygon; The knob head on the key is the corresponding concave or convex polygon.

6. The self-closing bottle valve with anti-theft charging function according to claim 3, characterized in that, It further includes a sealing pin (7.8); One side of the sealing pin relative to the anti-filling self-closing valve core cavity is arc-shaped. When the anti-filling lock core is in the closed state, the sealing pin fits with the inflation hole to seal the inflation flow channel; When the anti-filling lock core is in the open state, the sealing pin is separated from the inflation hole to conduct the inflation flow channel.

7. The self-closing bottle valve with anti-theft charging function according to claim 1, characterized in that, The interaction between the magnetic lock pin and the magnetic core is selected from the following group: magnetic attraction or magnetic repulsion.

8. The self-closing bottle valve with anti-theft charging function according to claim 7, characterized in that, The magnetic lock pin is made of a material selected from the following group: magnetic material, permanent magnet material, or a combination thereof.

9. The self-closing bottle valve with anti-theft charging function according to claim 6, characterized in that, When the anti-filling lock core is in the closed state, the inflation flow channel is closed by the anti-filling self-closing valve core.

10. The self-closing bottle valve with anti-theft charging function according to claim 1, characterized in that, The self-closing bottle valve with anti-filling function further includes a return spring (4) and a lock nut (5); The return spring is configured to reset the anti-filling self-closing valve core (3); The lock nut is configured to support and limit the return spring.

11. The self-closing bottle valve with anti-theft charging function according to claim 1, characterized in that, The self-closing bottle valve with anti-filling function further includes a sedimentation tube (6); The sedimentation tube is connected to the valve body, and the sedimentation tube is configured to prevent particulate pollutants in the gas cylinder from entering the interior of the bottle valve and damaging the seal of the bottle valve when cleaning the residual liquid in the gas cylinder.

12. The self-closing bottle valve with anti-theft charging function according to claim 1, characterized in that, The anti-filling self-closing valve core includes an upper valve core (3.2), an anti-filling core (3.3), and a lower valve core (3.5); The lower valve core includes a sealing surface (3.5.1); The upper valve core is connected to the lower valve core; The anti-filling core is accommodated in the upper valve core; The anti-filling core forms a seal with the sealing surface of the lower valve core to achieve the anti-filling function.

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