A liquefied petroleum gas cylinder valve with electromagnetic cut-off

Abstract

The present invention relates to the technical field of valves, and specifically to a liquefied petroleum gas cylinder valve with electromagnetic cut-off, which includes a valve body. On one side of the valve body, there is an air outlet port. An electromagnetic valve sleeve is fixedly sleeved outside the air outlet port. A valve core is movably arranged inside the air outlet port. A first guide through hole is penetrated through the valve core. The inner side of the valve core is connected to the inner end of the air outlet port through a closing spring. In the natural state, the closing spring is in a compressed state. The outer end face of the air outlet port is provided with an annular extension ring. A through hole is penetrated through the extension ring, and a steel ball is movably embedded in the through hole to prevent the valve core from sliding outwards. Through the electromagnetic attraction mechanism, the present invention can automatically close the air outlet port of the cylinder valve, thereby effectively avoiding the continuous leakage of liquefied petroleum gas, and thus greatly improving the safety performance of the cylinder valve.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a liquefied petroleum gas cylinder valve with electromagnetic cut-off. Background Technique

[0002] A cylinder valve refers to a valve that controls the gas inlet and outlet in a cylinder. Currently, common cylinder valves are generally flap-type cylinder valves, which are convenient to use and can be directly opened with a wrench. When in use, rotating counterclockwise is for opening, and rotating clockwise is for closing. As Figure 1 shown, a conventional cylinder valve includes a cylinder valve body 1 and an air outlet port 2. The same type of cylinder valve is also used on liquefied petroleum gas cylinders. Specifically in use, the bottom of the cylinder valve body 1 needs to be connected to the bottle mouth, the air outlet port 2 needs to be connected to a hose, and then the opening and closing of the air outlet port 2 can be controlled by rotating the wrench at the top of the cylinder valve body 1. However, this ordinary-structured cylinder valve still has some defects in use. For example, when an existing liquefied petroleum gas cylinder is in use, there may be a phenomenon of liquefied petroleum gas leakage due to a hose rupture, or due to failure to successfully ignite and the cylinder valve not being closed, resulting in liquefied petroleum gas leakage, thereby triggering major safety accidents and seriously affecting the use safety of residents. Therefore, we have proposed a liquefied petroleum gas cylinder valve with electromagnetic cut-off to well solve the above drawbacks. Summary of the Invention

[0003] The purpose of the present invention is to provide a liquefied petroleum gas cylinder valve with electromagnetic cut-off to solve the problems raised in the above background technique.

[0004] The present invention is achieved through the following technical solutions:

[0005] A liquefied petroleum gas cylinder valve with electromagnetic cut-off includes a cylinder valve body. One side of the cylinder valve body is provided with an air outlet port. An electromagnetic valve sleeve is fixedly sleeved outside the air outlet port. A valve core is movably arranged inside the air outlet port. A first guiding hole is penetrated through the valve core. The inner side of the valve core is connected to the inner end of the air outlet port through a closing spring. In the natural state, the closing spring is in a compressed state. The outer end face of the air outlet port is provided with an annular extension ring. A through hole is penetrated through the extension ring. A steel ball is movably embedded in the through hole to prevent the valve core from sliding outward.

[0006] A cut-off valve seat is fixedly arranged inside the electromagnetic valve sleeve. A second guiding hole is penetrated through the cut-off valve seat. An annular slider is slidably sleeved on the outer periphery of the cut-off valve seat. The outer end of the slider is connected to the cut-off valve seat through a return spring. The other end of the slider extends into the gap between the electromagnetic valve sleeve and the extension ring. In the natural state, the return spring is in a compressed state.

[0007] An electromagnetic attraction mechanism is provided outside the solenoid valve sleeve for attracting the slider to slide outward.

[0008] Optionally, a central hole is penetrated through the cut-off valve seat, and a guide rod is provided on the outer side of the valve core. The guide rod movably penetrates through the central hole.

[0009] Optionally, a sealing valve pad is fixedly connected to the outer side of the valve core by screws; when the sealing valve pad fits with the cut-off valve seat, the air outlet port is in a closed state.

[0010] Optionally, a first inclined cut surface is provided along the outer circumference of one end of the valve core, and a second inclined cut surface is provided along the inner circumference of one end of the slider.

[0011] Optionally, the electromagnetic attraction mechanism includes an annular iron core and an electromagnetic coil. The iron core is fixedly sleeved outside the solenoid valve sleeve, and the electromagnetic coil is wound outside the iron core.

[0012] Optionally, a shielding spacer is sleeved outside the iron core and the electromagnetic coil together, and the shielding spacer is fixedly connected to the outer peripheral wall of the solenoid valve sleeve.

[0013] Optionally, the air outlet port is threadedly connected to the solenoid valve sleeve, and a sealing rubber ring is provided on the outer end surface of the air outlet port. The sealing rubber ring fits tightly with the solenoid valve sleeve.

[0014] Compared with the prior art, the present invention provides a liquefied petroleum gas cylinder valve with electromagnetic cut-off, having the following beneficial effects:

[0015] 1. The present invention can automatically close the air outlet port of the cylinder valve through the electromagnetic attraction mechanism, thereby effectively avoiding continuous leakage of liquefied petroleum gas, and thus greatly improving the safety performance of the cylinder valve;

[0016] 2. The solenoid valve sleeve and the air outlet port in the present invention are threadedly connected, which is convenient for disassembly and assembly. Therefore, it is convenient to replace and maintain the solenoid valve sleeve and its internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an existing cylinder valve;

[0018] Figure 2 It is a schematic diagram of the structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the closed state of the air outlet port of the present invention;

[0020] Figure 4 It is a schematic diagram of the conducting state of the air outlet port of the present invention;

[0021] Figure 5 For Figure 3 the enlarged corresponding figure at position A in

[0022] Figure 6 This is a schematic diagram of the valve core structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the cut-off valve seat structure of the present invention.

[0024] In the figure: 1. Bottle valve body; 2. Gas outlet port; 3. Solenoid valve sleeve; 4. Valve core; 5. Closing spring; 6. Extension ring; 7. Through hole; 8. Steel ball; 9. Cut-off valve seat; 10. Slide block; 11. Return spring; 12. First guiding through hole; 13. Second guiding through hole; 14. Central hole; 15. Guide rod; 16. Sealing valve pad; 17. First inclined plane; 18. Second inclined plane; 19. Iron core; 20. Electromagnetic coil; 21. Shielding spacer; 22. Sealing rubber ring. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment: Please refer to Figures 2 - 7 , a liquefied petroleum gas bottle valve with electromagnetic cut-off, including a bottle valve body 1. An air outlet port 2 is provided on one side of the bottle valve body 1. A valve core 4 is movably arranged inside the air outlet port 2. The valve core 4 has a disc-shaped structure. A first guiding through hole 12 is penetrated through the valve core 4. One side of the valve core 4 facing inwards is connected to the inner end of the air outlet port 2 through a closing spring 5. As Figure 3 , both ends of the closing spring 5 are respectively in contact with the valve core 4 and the inner end of the air outlet port 2, and in the natural state, the closing spring 5 is in a compressed state; an annular extension ring 6 is provided on the outer end face of the air outlet port 2. As Figure 6 , a through hole 7 is penetrated through the extension ring 6. A steel ball 8 is movably embedded in the through hole 7 to prevent the valve core 4 from sliding outwards. The diameter of the steel ball 8 is adapted to the inner diameter of the through hole 7; in addition, a first inclined plane 17 is provided around the outer end of the valve core 4 along the outer circumference. Therefore, when one end of the steel ball 8 extends out of the through hole 7 and is located inside the air outlet port 2, the valve core 4 can be prevented from sliding outwards.

[0027] An external fixed sleeve of the air outlet port 2 is provided with a solenoid valve sleeve 3. An internal fixed cut-off valve seat 9 is arranged inside the solenoid valve sleeve 3. A second through hole 13 is penetrated and opened on the cut-off valve seat 9. An annular slider 10 is slidably sleeved on the outer periphery of the cut-off valve seat 9. One end of the slider 10 facing outward is connected to the cut-off valve seat 9 through a return spring 11. The other end of the slider 10 extends into the gap between the solenoid valve sleeve 3 and the extension ring 6. In the natural state, the return spring 11 is in a compressed state. Specifically, both ends of the return spring 11 are respectively abutted against the slider 10 and the cut-off valve seat 9. In addition, a second inclined surface 18 is provided along the inner circumference of one end of the slider 10 facing inward. The function of the second inclined surface 18 is to squeeze the steel ball 8 into the through hole 7.

[0028] An electromagnetic attraction mechanism is arranged outside the solenoid valve sleeve 3 for attracting the slider 10 to slide outward. The electromagnetic attraction mechanism includes an annular iron core 19 and an electromagnetic coil 20. The iron core 19 is fixedly sleeved outside the solenoid valve sleeve 3. The electromagnetic coil 20 is wound outside the iron core 19. A shielding spacer 21 is jointly sleeved outside the iron core 19 and the electromagnetic coil 20. The shielding spacer 21 is fixedly connected to the outer peripheral wall of the solenoid valve sleeve 3. The shielding spacer 21 is used to avoid magnetic leakage. When the electromagnetic coil 20 is energized, a magnetic field can be generated inside the solenoid valve sleeve 3 through the action of the iron core 19, thereby attracting the slider 10 to slide to the right.

[0029] On the basis of the above embodiment, a central hole 14 is penetrated and opened on the cut-off valve seat 9. As Figure 7 , a guide rod 15 is provided on the outer side of the valve core 4. The guide rod 15 movably penetrates through the central hole 14. Therefore, the valve core 4 can slide left and right along the direction of the guide rod 15. A sealing valve pad 16 is fixedly connected to the outer side of the valve core 4 through a screw. When the sealing valve pad 16 is attached to the cut-off valve seat 9, the air outlet port 2 is in a closed state. As Figure 3 shown, when the sealing valve pad 16 is separated from the cut-off valve seat 9, the air outlet port 2 is in a conducting state. As Figure 4 shown. In addition, the air outlet port 2 is threadedly connected to the solenoid valve sleeve 3. A sealing rubber ring 22 is attached to the outer end face of the air outlet port 2. The sealing rubber ring 22 is closely attached to the solenoid valve sleeve 3. The sealing rubber ring 22 is made of rubber material.

[0030] It is worth mentioning that in this embodiment, there are certain requirements for the spring stiffness coefficients of the closing spring 5 and the return spring 11. For details, please refer to Figure 4, at this time, the air outlet port 2 is in a conducting state. The steel ball 8 is located within the through hole 7, and both ends of the steel ball 8 are respectively in contact with the first inclined surface 17 and the second inclined surface 18. The closing spring 5 pushes the valve core 4 to move to the right, and the return spring 11 pushes the slider 10 to move to the left. Therefore, when selecting the closing spring 5 and the return spring 11, it is necessary to ensure that the closing spring 5 cannot push the valve core 4 to extrude the steel ball 8 out of the through hole 7, ensuring that the air outlet port 2 is always in a conducting state.

[0031] In addition, it should be noted that when this embodiment is specifically used, it needs to be used in conjunction with a concentration sensor. The concentration sensor is used to detect the concentration of combustible gas in the environment, and the concentration sensor is electrically connected to the electromagnetic coil 20 through a controller; when liquefied petroleum gas leaks, the concentration of combustible gas in the environment will gradually increase. When the concentration of combustible gas increases to a certain amount, it will trigger the alarm signal of the concentration sensor, and then turn on the switch on the electromagnetic coil 20 through the controller to energize the electromagnetic coil; after the electromagnetic coil 20 is energized, a magnetic field will be generated inside the solenoid valve sleeve 3, and then attract the slider 10 to slide to the right; it is worth mentioning that the electromagnetic force exerted on the slider 10 by this electromagnetic field is greater than the elastic force of the return spring 11 on the slider 10; when the slider 10 moves to the right to the state as shown in Figure 3 , the valve core 4 will slide to the right under the action of the closing spring 5, and then extrude the steel ball 8 out of the through hole 7 until the sealing valve pad 16 abuts against the cut-off valve seat 9, so that the gas in the air outlet port 2 cannot be discharged. At this time, the air outlet port 2 is in a closed state, avoiding continuous leakage of liquefied petroleum gas.

[0032] It should be noted that in this article, relational 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 "include", "comprise" or any other variant 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 a..." does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquefied petroleum gas cylinder valve with electromagnetic cut-off, comprising a cylinder valve body (1), and an air outlet port (2) is arranged on one side of the cylinder valve body (1), characterized in that: An electromagnetic valve sleeve (3) is fixedly sleeved outside the air outlet port (2). A valve core (4) is movably arranged inside the air outlet port (2). A first guiding through hole (12) is formed through the valve core (4). One side of the valve core (4) facing inwards is connected to the inner end of the air outlet port (2) through a closing spring (5). In the natural state, the closing spring (5) is in a compressed state. An annular extension ring (6) is arranged on the outer end face of the air outlet port (2). A through hole (7) is formed through the extension ring (6). A steel ball (8) is movably embedded in the through hole (7) to prevent the valve core (4) from sliding outwards. A cut-off valve seat (9) is fixedly arranged inside the electromagnetic valve sleeve (3). A second guiding through hole (13) is formed through the cut-off valve seat (9). An annular slider (10) is slidably sleeved on the outer periphery of the cut-off valve seat (9). One end of the slider (10) facing outwards is connected to the cut-off valve seat (9) through a return spring (11). The other end of the slider (10) extends into the gap between the electromagnetic valve sleeve (3) and the extension ring (6). In the natural state, the return spring (11) is in a compressed state. An electromagnetic attracting mechanism is arranged outside the electromagnetic valve sleeve (3) to attract the slider (10) to slide outwards. A central hole (14) is formed through the cut-off valve seat (9). A guiding rod (15) is arranged on one side of the valve core (4) facing outwards. The guiding rod (15) movably penetrates through the central hole (14). The electromagnetic attracting mechanism includes an annular iron core (19) and an electromagnetic coil (20). The iron core (19) is fixedly sleeved outside the electromagnetic valve sleeve (3). The electromagnetic coil (20) is wound outside the iron core (19).

2. The liquefied petroleum gas cylinder valve with electromagnetic cut-off according to claim 1, characterized in that: A sealing valve pad (16) is fixedly connected to one side of the valve core (4) facing outwards through a screw. When the sealing valve pad (16) is in contact with the cut-off valve seat (9), the air outlet port (2) is in a closed state.

3. A liquefied petroleum gas cylinder valve with electromagnetic cut-off according to claim 1, characterized in that: A first inclined cutting surface (17) is formed in a circle along the outer periphery at one end of the valve core (4) facing outwards. A second inclined cutting surface (18) is formed in a circle along the inner periphery at one end of the slider (10) facing inwards.

4. A liquefied petroleum gas cylinder valve with electromagnetic cut-off according to claim 1, characterized in that: A shielding spacer sleeve (21) is jointly sleeved outside the iron core (19) and the electromagnetic coil (20). The shielding spacer sleeve (21) is fixedly connected to the outer peripheral wall of the electromagnetic valve sleeve (3). The air outlet port (2) is threadedly connected to the electromagnetic valve sleeve (3). A sealing rubber ring (22) is arranged in contact with the outer end face of the air outlet port (2). The sealing rubber ring (22) is in close contact with the electromagnetic valve sleeve (3).

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