Liquefied gas cylinder valve and liquefied gas cylinder

Abstract

The liquefied gas cylinder valve comprises a valve body, a support and a valve element, a gas inlet and a gas outlet are formed in the valve body, the support is installed in the gas inlet, an inner hole is formed in the support, a support sealing end face is further arranged on the support, the valve element is installed in the inner hole, and the valve element is connected with the gas inlet and the gas outlet. A valve element sealing piece is arranged on the valve element, and a gas flow channel for liquefied gas to pass through is formed between the valve element and the support. Wherein the valve element has a first state and a second state, and when the valve element is in the first state, the valve element sealing piece does not make contact with the support sealing end face, and the airflow channel is in an open state; when the valve element is in the second state, the valve element sealing piece makes contact with the support sealing end face, and the airflow channel is in a blocked state. According to the liquefied gas bottle valve, liquefied gas can be automatically cut off when the flow of the liquefied gas is too large, the liquefied gas is not affected when normally discharged and used and filled, and the use safety of a liquefied gas bottle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquefied petroleum gas, and particularly relates to a liquefied gas cylinder valve and a liquefied gas cylinder. Background Art

[0002] Liquefied petroleum gas is a colorless volatile liquid, which is extremely flammable. When its content in the air reaches a certain concentration range, it can explode when encountering an open flame. Moreover, bottled liquefied petroleum gas is mainly used in families and restaurants in China.

[0003] Currently, when the regulator, hose, cooking appliance, etc. connected to the liquefied gas cylinder valve leak and the flow rate of the cylinder valve is too large, it cannot be automatically cut off, and the liquefied gas will continue to leak, bringing safety risks to users.

[0004] Therefore, how to automatically cut off the liquefied gas when the flow rate of the liquefied gas is too large, so as to improve the safety of using the liquefied gas cylinder and ensure the life and property safety of users is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a liquefied gas cylinder valve, which can automatically cut off the liquefied gas when the flow rate of the liquefied gas is too large, so as to improve the safety of using the liquefied gas cylinder and ensure the life and property safety of users.

[0006] Another purpose of the utility model is also to provide a liquefied gas cylinder.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A liquefied gas cylinder valve, comprising:

[0009] A valve body, on which an air inlet and an air outlet are provided;

[0010] A bracket, which is installed in the air inlet. An inner hole is provided in the bracket, and a bracket sealing end face is also provided on the bracket;

[0011] A valve core, which is installed in the inner hole. A valve core seal is provided on the valve core, and an air flow channel for the liquefied gas to pass through is formed between the valve core and the bracket;

[0012] Wherein, the valve core has a first state and a second state. When the valve core is in the first state, the valve core seal does not contact the bracket sealing end face, and the air flow channel is in an open state; when the valve core is in the second state, the valve core seal contacts the bracket sealing end face, and the air flow channel is in a blocked state.

[0013] Optionally, the bracket fits against the inner wall of the air inlet, and a bracket seal is provided between the valve body and the bracket.

[0014] Optionally, the valve core includes a valve core body and a valve core end. The valve core body is disposed within the inner hole, the valve core end is disposed outside the inner hole, and the valve core seal is disposed at the valve core end.

[0015] Optionally, a first positioning member is further included. A step is provided on the valve core body, and the first positioning member is disposed on the step.

[0016] Optionally, a second positioning member is further included. A clamping groove is provided on the valve core body, and the clamping groove is disposed above the step. The second positioning member is disposed within the clamping groove, the lower end surface of the second positioning member abuts against the upper end surface of the first positioning member, and the second positioning member can fix the first positioning member on the valve core body.

[0017] Optionally, a first threaded portion is provided on the first positioning member, and a second threaded portion cooperating with the first positioning member is provided on the valve core body.

[0018] Optionally, a driving mechanism is further included. The driving mechanism is installed on one side of the valve body, and the driving mechanism can abut against the first positioning member to prevent the valve core seal and the bracket seal end face from contacting when discharging gas at a large flow rate.

[0019] Optionally, the driving mechanism includes a driving ring, an iron core, and a return spring. The iron core is connected to the valve body, the driving ring is installed on the iron core, and the return spring is disposed between the driving ring and the valve body.

[0020] Optionally, a gasket is further provided between the iron core and the valve body.

[0021] A liquefied gas cylinder includes the liquefied gas cylinder valve as described in any one of the above. An external thread is provided on the outside of the air inlet of the liquefied gas cylinder valve, and the liquefied gas cylinder valve is connected to the liquefied gas cylinder through the external thread of the air inlet.

[0022] It can be seen from the above technical solutions that when the liquefied gas is normally discharged for use, the valve core is in the first state. At this time, the valve core seal does not contact the bracket seal end face. When the liquefied gas cylinder valve is opened, the liquefied gas in the liquefied gas cylinder enters the gas flow channel of the liquefied gas cylinder valve through the air inlet of the liquefied gas cylinder valve, and then enters the gas-using equipment through the air outlet.

[0023] When filling liquefied gas, the valve core is in the first state. At this time, the valve core seal does not contact the bracket seal end face. When the liquefied gas cylinder valve is opened, the liquefied gas can enter the liquefied gas cylinder from the outside through the gas flow channel.

[0024] When a gas-using device leaks, causing the gas outlet flow rate of the liquefied gas cylinder valve to be too large, the thrust generated by the liquefied gas is greater than the gravity and friction of the valve core, etc., and the valve core is pushed to move upward. The valve core seal contacts and seals with the support seal end face. At this time, the valve core is in the second state, and the liquefied gas flow is cut off.

[0025] The liquefied gas cylinder valve disclosed in the embodiment of the present invention can automatically cut off the liquefied gas when the liquefied gas flow rate is too large, and is not affected during normal gas outlet use and liquefied gas filling of the liquefied gas. Therefore, the safety of using the liquefied gas cylinder is greatly improved, and the life and property safety of users are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0027] Figure 1 It is a schematic cross-sectional structure diagram of the liquefied gas cylinder valve disclosed in the embodiment of the present invention;

[0028] Figure 2 It is a partial cross-sectional structure diagram of the support disclosed in the embodiment of the present invention;

[0029] Figure 3 It is a top view structure diagram of the support disclosed in the embodiment of the present invention;

[0030] Figure 4 It is a three-dimensional structure diagram of the support disclosed in the embodiment of the present invention.

[0031] Among them, the names of each component are as follows:

[0032] 100, valve body; 101, air inlet; 102, air outlet; 200, support; 201, inner hole; 202, support seal end face; 203, support seal; 300, valve core; 301, valve core body; 302, valve core end; 303, valve core seal; 400, gas flow channel; 500, first positioning member; 600, second positioning member; 700, driving mechanism; 701, driving ring; 702, iron core; 703, return spring; 800, bottom plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In view of this, the core of the present invention is to provide a liquefied gas cylinder valve that can automatically cut off the liquefied gas when the liquefied gas flow rate is too large, thereby improving the safety of using the liquefied gas cylinder and ensuring the life and property safety of users.

[0034] Another core of the present utility model also lies in providing a liquefied gas cylinder.

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. Please refer to Figures 1 to 4 .

[0036] The liquefied gas cylinder valve disclosed in the embodiments of the present utility model includes a valve body 100, a bracket 200, and a valve core 300. Among them, an air inlet 101 and an air outlet 102 are provided on the valve body 100. The bracket 200 is installed in the air inlet 101. An inner hole 201 is provided in the bracket 200. A bracket sealing end face 202 is also provided on the bracket 200. The valve core 300 is installed in the inner hole 201. A valve core seal 303 is provided on the valve core 300. An air flow channel 400 for the passage of liquefied gas is formed between the valve core 300 and the bracket 200.

[0037] Among them, the valve core 300 has a first state and a second state. When the valve core 300 is in the first state, the valve core seal 303 does not contact the bracket sealing end face 202, and the air flow channel 400 is in an open state; when the valve core 300 is in the second state, the valve core seal 303 contacts the bracket sealing end face 202, and the air flow channel 400 is in a blocked state.

[0038] When the liquefied gas is normally discharged for use, the valve core 300 is in the first state. At this time, the valve core seal 303 does not contact the bracket sealing end face 202. The liquefied gas cylinder valve is opened, and the liquefied gas in the liquefied gas cylinder enters the air flow channel 400 of the liquefied gas cylinder valve through the air inlet 101 of the liquefied gas cylinder valve, and then enters the gas-using equipment through the air outlet 102.

[0039] When filling the liquefied gas, the valve core 300 is in the first state. At this time, the valve core seal 303 does not contact the bracket sealing end face 202. The liquefied gas cylinder valve is opened, and the liquefied gas can enter the liquefied gas cylinder from the outside through the air flow channel 400.

[0040] When a leakage occurs in the gas-using equipment, resulting in an excessive gas outlet flow rate of the liquefied gas cylinder valve, the thrust generated by the liquefied gas is greater than the gravity and friction of the valve core 300, etc. The valve core 300 is pushed upward to move, and the valve core seal 303 contacts and seals with the bracket sealing end face 202. At this time, the valve core 300 is in the second state, and the liquefied gas flow is cut off.

[0041] The liquefied gas cylinder valve disclosed in the embodiment of the present utility model can automatically cut off the liquefied gas when the flow rate of the liquefied gas is too large, and is not affected during normal gas outlet use and gas filling of the liquefied gas. Therefore, the safety of using the liquefied gas cylinder is greatly improved, ensuring the life and property safety of users.

[0042] As a further embodiment, the bracket 200 disclosed in the embodiment of the present utility model fits against the inner wall of the air inlet 101.

[0043] In order to further achieve the seal between the valve body 100 and the bracket 200, a bracket seal 203 is also provided between the valve body 100 and the bracket 200 in the liquefied gas cylinder valve disclosed in the embodiment of the present utility model. With this arrangement, it is further ensured that the liquefied gas can only pass through the air flow channel 400.

[0044] Moreover, when the valve core 300 is in the second state, it can also ensure that the liquefied gas flow is completely cut off.

[0045] The embodiment of the present utility model does not limit the specific structure of the bracket seal 203, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0046] As a preferred embodiment, the bracket seal 203 disclosed in the embodiment of the present utility model is preferably an O-ring seal. Among them, an installation groove for installing the O-ring seal is provided on one side of the bracket 200 that fits against the valve body 100, and the O-ring seal is installed in the installation groove. The O-ring seal can achieve good sealing between the bracket 200 and the inner wall of the valve body 100.

[0047] The embodiment of the present utility model does not limit the specific structure of the valve core 300, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0048] As one of the embodiments, the valve core 300 disclosed in the embodiment of the present utility model includes a valve core body 301 and a valve core end 302. Among them, the valve core body 301 is arranged in the inner hole 201, the valve core end 302 is arranged outside the inner hole 201, and a valve core seal 303 is arranged on the valve core end 302.

[0049] When the flow rate of the liquefied gas is too large, the valve core 300 is pushed, and the valve core body 301 moves vertically in the inner hole 201. The valve core seal 303 arranged on the valve core end 302 contacts the bracket seal end face 202, thereby blocking the air flow channel 400.

[0050] When the liquefied gas is used for normal gas outlet, the valve core seal 303 at the valve core end 302 is placed outside the inner hole 201. At this time, the air flow channel 400 is opened, and the liquefied gas can pass through the air flow channel 400.

[0051] To achieve the installation and positioning of the valve core 300, the liquefied gas cylinder valve disclosed in the embodiment of the present utility model further includes a first positioning member 500.

[0052] Wherein, a step is provided on the valve core body 301, and the first positioning member 500 is arranged on the step.

[0053] To achieve the fixation of the first positioning member 500, specifically, please refer to Figure 1 , the liquefied gas cylinder valve disclosed in the embodiment of the present utility model further includes a second positioning member 600. Wherein, a clamping groove is provided on the valve core body 301, the clamping groove is arranged on the upper part of the step, the second positioning member 600 is arranged in the clamping groove, and the lower end surface of the second positioning member 600 abuts against the upper end surface of the first positioning member 500. With such a setting, the second positioning member 600 fixes the first positioning member 500 on the step of the valve core body 301, and the valve core 300, the first positioning member 500, and the second positioning member 600 can be connected into a whole.

[0054] Of course, only the first positioning member 500 can be provided without the need to provide the second positioning member 600. When only the first positioning member 500 is provided, a first threaded portion can be provided on the first positioning member 500, and a second threaded portion cooperating with the first positioning member 500 is provided on the valve core body 301. Wherein, the first positioning member 500 and the valve core body 301 can be screwed and matched to fix the first positioning member 500 on the valve core body 300.

[0055] It should be noted that the contact between the first positioning member 500 and the bracket 200 is due to the gravity of the valve core 300, the first positioning member 500, and the second positioning member 600 naturally falling on it.

[0056] When the valve core 300 is in a natural state, the valve core 300 is positioned by the first positioning member 500 and the second positioning member 600; when the valve core 300 is pushed to move upward, the valve core 300 drives the second positioning member 600 and the first positioning member 500 to move upward simultaneously.

[0057] To further facilitate the installation and disassembly of the valve core 300, the second positioning member 600 disclosed in the embodiment of the present utility model is a snap ring.

[0058] Since during the entire life cycle of the liquefied gas cylinder valve, in addition to normal filling and use, there is also a situation of large-flow gas outlet under specific conditions such as vacuum pumping in the steel cylinder factory, the liquefied gas cylinder valve is also required to be able to have a large-flow gas outlet.

[0059] The gas cylinder valve of the present utility model embodiment further includes a driving mechanism 700. Among them, the driving mechanism 700 is installed on one side of the valve body 100. When large-flow gas outlet is realized under specific circumstances, the driving mechanism 700 abuts against the first positioning member 500, thereby restricting the contact between the valve core seal 303 and the support seal end face 202 during large-flow gas outlet.

[0060] It should be noted that an air outlet 102 is provided on the side of the valve body 100 opposite to the driving mechanism 700.

[0061] When the driving mechanism 700 contacts the first positioning member 500, even if a large flow of gas pushes the valve core 300, the valve core 300 cannot move upward under the block of the driving mechanism 700. Therefore, the support seal end face 202 and the valve core seal 303 cannot contact, and the air flow channel 400 is in an open state. After the gas passes through the air flow channel 400, it flows out from the air outlet 102.

[0062] The specific structure of the driving mechanism 700 in the embodiment of the present utility model is not limited, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0063] As one of the embodiments, the driving mechanism 700 disclosed in the embodiment of the present utility model includes a driving ring 701, an iron core 702, and a return spring 703. Among them, the iron core 702 is connected to the valve body 100, the driving ring 701 is installed on the iron core 702, and the return spring 703 is arranged between the driving ring 701 and the valve body 100.

[0064] When large-flow gas outlet is required under specific circumstances, it needs to be carried out in cooperation with supporting equipment. The supporting equipment is connected to the gas cylinder valve. Since an electromagnetic induction device is provided on the supporting equipment, using the principle of electromagnetics, the driving ring 701 can be pushed to move towards the direction of the valve core 300 against the elastic force of the return spring 703. At this time, large-flow gas outlet occurs. The valve core 300 and the first positioning member 500 are blocked by the driving ring 701 and cannot move upward. Therefore, the support seal end face 202 and the valve core seal 303 cannot contact, and the air flow channel 400 is in an open state. At this time, large-flow gas outlet can be carried out smoothly. After the gas flows out from the air outlet 102, the supporting equipment is removed, and under the action of the return spring 703, the driving ring 701 returns to the initial state.

[0065] In order to achieve the seal between the iron core 702 and the valve body 100, a gasket is further provided between the iron core 702 and the valve body 100 in the gas cylinder valve disclosed in the embodiment of the present utility model.

[0066] It should be noted that the gas cylinder valve disclosed in the embodiment of the present utility model further includes a bottom plug 800. Among them, the bottom plug 800 is arranged at the lower part of the support 200 and is used to support the support 200.

[0067] An embodiment of the present utility model also discloses a liquefied gas cylinder, which includes a liquefied gas cylinder valve disclosed in any of the above embodiments. Among them, an external thread is provided on the outer side of the air inlet 101 of the liquefied gas cylinder valve, and the liquefied gas cylinder valve is connected to the liquefied gas cylinder through the external thread of the air inlet.

[0068] Since this liquefied gas cylinder adopts the liquefied gas cylinder valve disclosed in the above embodiment, therefore, this liquefied gas cylinder has the technical advantages of the above liquefied gas cylinder valve, and the embodiments of the present utility model will not elaborate on them one by one.

[0069] Finally, it should also 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 term "including" or any other variant thereof is 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 further includes elements inherent to such process, method, article or device.

[0070] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other.

[0071] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquefied gas cylinder valve, characterized in that: include: A valve body, wherein the valve body is provided with an air inlet and an air outlet; A bracket, the bracket is installed in the air inlet, an inner hole is provided in the bracket, and a bracket sealing end surface is also provided on the bracket; A valve core, the valve core is installed in the inner hole, a valve core seal is provided on the valve core, and an air flow channel for liquefied gas to pass through is formed between the valve core and the bracket; Wherein, the valve core has a first state and a second state. When the valve core is in the first state, the valve core seal is not in contact with the sealing end surface of the bracket, and the air flow channel is in an open state; when the valve core is in the second state, the valve core seal is in contact with the sealing end surface of the bracket, and the air flow channel is in a blocked state.

2. The liquefied gas cylinder valve according to claim 1, characterized in that: The bracket is fitted with the inner wall of the air inlet, and a bracket seal is provided between the valve body and the bracket.

3. The liquefied gas cylinder valve according to claim 1, characterized in that: The valve core comprises a valve core body and a valve core end, the valve core body is arranged in the inner hole, the valve core end is arranged outside the inner hole, and the valve core sealing member is arranged at the valve core end.

4. The liquefied gas cylinder valve according to claim 3, characterized in that: It also includes a first positioning member. A step is provided on the valve core body, and the first positioning member is provided on the step.

5. The liquefied gas cylinder valve according to claim 4, characterized in that: It also includes a second positioning member, a slot is provided on the valve core body, the slot is provided on the upper part of the step, the second positioning member is provided in the slot, the lower end surface of the second positioning member is abutted against the upper end surface of the first positioning member, and the second positioning member can fix the first positioning member on the valve core body.

6. The liquefied gas cylinder valve according to claim 4, characterized in that: The first positioning member is provided with a first threaded portion, and the valve core body is provided with a second threaded portion that matches the first positioning member.

7. The liquefied gas cylinder valve according to claim 4, characterized in that: It also includes a driving mechanism, which is installed on one side of the valve body. The driving mechanism can abut against the first positioning member to limit the contact between the valve core sealing member and the sealing end surface of the bracket when a large flow rate of gas is discharged.

8. The liquefied gas cylinder valve according to claim 7, characterized in that: The driving mechanism comprises a driving ring, an iron core and a return spring, the iron core is connected to the valve body, the driving ring is mounted on the iron core, and the return spring is arranged between the driving ring and the valve body.

9. The liquefied gas cylinder valve according to claim 8, characterized in that: A sealing gasket is also arranged between the iron core and the valve body.

10. A liquefied gas cylinder, characterized in that: It comprises a liquefied gas cylinder valve as described in any one of claims 1 to 9, wherein an external thread is arranged on the outer side of the gas inlet of the liquefied gas cylinder valve, and the liquefied gas cylinder valve is connected to the liquefied gas cylinder through the external thread of the gas inlet.

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