Flow-limiting valve and gas tank
By designing the matching structure of the flow limiting core and stop portion of the flow limiting valve, the overflow cut-off and safety protection of the liquefied gas tank are achieved, and the leakage problem during the use of the liquefied gas tank is solved, ensuring safety and normal use recovery.
Patent Information
- Application Number
- CN202422170941.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The valve body of the existing liquefied gas tank is prone to leakage due to faults during use, and lacks the overcurrent cutting function, which poses safety hazards.
A flow restriction valve is designed, including the main valve body, air intake pipe, a lower sleeve of limiting position, an opening and closing assembly, a flow restriction core and a trigger assembly. The overcurrent cut-off is achieved through the coordination between the flow restriction core and the interior of the main valve body, and the airflow passage is restored after troubleshooting. The matching structure between the flow restriction core and the stop part is adopted, and the trigger assembly is used to control the movement of the flow restriction core.
实现了液化气罐在过流或过压情况下的安全保护,自动切断气流通道,确保安全,同时在故障排除后恢复正常使用,避免不必要的气体流失。
Smart Images
Figure CN223076749U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of valves, and particularly relates to a flow-limiting valve. Background Art
[0002] A liquefied gas tank refers to a storage tank for storing liquefied gas. When there is liquefied gas inside, the pressure is very high. Slight improper operation may cause an explosion, and it belongs to special equipment.
[0003] Currently, the main valve body of the common liquefied gas tank on the market is a closed valve, that is, a common rotary butterfly valve. When it is used, the valve body needs to be rotated to open and close. During the use of the liquefied gas tank, if a failure occurs in the closed valve or the subsequent pipeline or the user's usage end, it will cause the liquefied gas tank to leak, that is, an overcurrent phenomenon will occur when the liquefied gas passes through the valve body. However, the current closed valve does not have an overcurrent cut-off function, which will cause the liquefied gas in the liquefied gas tank to flow out continuously, thus posing a hazard to public safety. Summary of the Utility Model
[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme:
[0005] A flow-limiting valve, comprising:
[0006] A main valve body, with an air flow channel formed inside;
[0007] An intake pipe, arranged at the intake end of the main valve body, and the outlet end of the intake pipe is communicated with the air flow channel;
[0008] A lower limit sleeve, arranged inside the air flow channel and abutted in the main valve body by the intake pipe;
[0009] An opening and closing assembly, located at the top of the main valve body and communicated with the inside of the main valve body, for opening or closing the air flow channel;
[0010] A flow-limiting core, formed inside the lower limit sleeve and the two can move axially relative to each other. The flow-limiting core has a core head adapted to the upper end of the air flow channel and a stop portion arranged on the side of the flow-limiting core;
[0011] A trigger assembly, located at the side end of the main valve body and communicated with the inside of the main valve body. The trigger assembly is used to impact the flow-limiting core or cooperate with the stop portion to prevent the flow-limiting core from moving towards the side of the opening and closing assembly.
[0012] Further, the stop portion includes a convex block extending radially outward along the flow-limiting core, and the top of the convex block has an arc-shaped groove for cooperating with the trigger assembly.
[0013] Further, the outer periphery of the bottom of the lower limit sleeve has a limit boss.
[0014] Furthermore, a positioning groove is provided at the air inlet end of the main valve body, which is matched with the limiting boss. Through the connection between the air inlet pipe and the main valve body, the limiting boss is abutted against the positioning groove by the air inlet pipe.
[0015] Furthermore, a plurality of air permeable through holes are circumferentially provided on the lower limiting sleeve.
[0016] Furthermore, the air permeable through holes are in a racetrack shape.
[0017] Furthermore, the cross sections of the lower limiting sleeve and the flow limiting core are in a polygonal structure that is adapted to each other.
[0018] Furthermore, the cross sections of the lower limiting sleeve and the flow limiting core are in a hexagonal structure that is adapted to each other.
[0019] Furthermore, a push rod that acts on the flow limiting core is provided in the trigger assembly. A trigger end face is provided on the side of the trigger assembly away from the main valve body, and the tail end of the push rod extends out of the trigger end face.
[0020] Furthermore, an annular groove is provided on the circumference of the push rod, and the annular groove is located inside the trigger section.
[0021] Compared with the prior art, the present utility model has the following beneficial effects:
[0022] When overcurrent occurs in the liquefied gas tank, the flow limiting valve in the present application cooperates with the internal cavity of the main valve body through the flow limiting core to close the air flow channel, thereby completing the overcurrent cut-off of the liquefied gas tank and realizing the safety protection function when the gas tank has overpressure and overcurrent;
[0023] In the trigger assembly of the present utility model, after troubleshooting, the trigger assembly acts on the flow limiting core to make the flow limiting core shake, generating a gap with the air flow channel and weakening the airtightness, so that the air flow can circulate again to restore the normal use of the flow limiting valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of a flow limiting valve of the present utility model;
[0025] Figure 2 is a top view structural schematic diagram of an embodiment of a flow limiting valve of the present utility model;
[0026] Figure 3 is Figure 2 the sectional structural schematic diagram of A-A in
[0027] Figure 4 is Figure 3 the partial enlarged view of A in
[0028] Figure 5 is the exploded structural schematic diagram of an embodiment of the present utility model;
[0029] Figure 6 This is a schematic structural diagram of the lower limit sleeve, current-limiting core, and trigger assembly in the embodiments of the present utility model;
[0030] The reference numerals in the attached drawings of the specification include:
[0031] Main valve body 1, air flow channel 10, positioning groove 11, air outlet end 12, intake pipe 2, lower limit sleeve 3, limit boss 30, air permeable through hole 31, opening and closing assembly 4, current-limiting core 5, core head 50, stop portion 51, arc-shaped groove 510, trigger assembly 6, trigger end face 60, ejector rod 61, annular groove 610. Detailed implementation manners
[0032] In order to enable those skilled in the art to better understand the present utility model, the technical solutions of the present utility model will be further described below with reference to the attached drawings and embodiments.
[0033] Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation on this patent; in order to better illustrate the embodiments of the present utility model, some components in the attached drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted. The same or similar reference numerals in the attached drawings of the embodiments of the present utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the attached drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the attached drawings are only for illustrative purposes and should not be construed as a limitation on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.
[0034] As Figures 1-6 shown, a current-limiting valve of the present utility model includes a main valve body 1, an intake pipe 2, a lower limit sleeve 3, and an opening and closing assembly 4;
[0035] Among them, an air flow channel 10 is formed inside the main valve body 1;
[0036] The intake pipe 2 is arranged at the intake end of the main valve body 1, and the air outlet end 12 of the intake pipe 2 is communicated with the air flow channel 10. The lower limit sleeve 3 is arranged inside the air flow channel 10 and is abutted against the main valve body 1 by the intake pipe 2;
[0037] One end of the intake pipe 2 is connected to the gas tank, and the other end of the intake pipe 2 is threadedly connected to the main valve body 1. During continuous screwing of the intake pipe 2, the intake pipe 2 coaxially fixes and installs the lower limit sleeve 3 inside the main valve body 1. Specifically, a limit boss 30 is provided on the outer circumference of the bottom of the lower limit sleeve 3. A positioning groove 11 matching the limit boss 30 is provided at the intake end of the main valve body 1. Through the connection between the intake pipe 2 and the main valve body 1, the limit boss 30 is abutted against the limit boss 30 by the intake pipe 2.
[0038] The opening and closing assembly 4 is located at the top of the main valve body 1 and is in communication with the inside of the main valve body 1 for opening or closing the air flow passage 10;
[0039] The specific structure of the opening and closing assembly 4 includes an opening and closing switch, an opening and closing plate, an opening and closing block, an opening and closing sealing block, and a closing valve rod. When in use, by screwing the opening and closing switch, the closing valve rod drives the opening and closing block to rotate through the opening and closing plate, and then the opening and closing block can squeeze the opening and closing sealing block, so that the opening and closing sealing block closes the air flow passage 10.
[0040] The structure of the opening and closing assembly 4 and the connection relationship of each component can specifically be the opening and closing assembly 4 in the patent with the application number 202311462030X.
[0041] Among them, the flow limiting core 5 in this embodiment is formed inside the lower limit sleeve 3, and the two can move axially relative to each other. The flow limiting core 5 has a core head 50 adapted to the upper end of the air flow passage 10 and a stop portion 51 provided on the side of the flow limiting core 5. The surface of the core head 50 is arc-shaped.
[0042] There is a sliding gap and play between the flow limiting core 5 and the lower limit sleeve 3, and the flow limiting core 5 can only move up or down along the axis of the lower limit sleeve 3.
[0043] During the normal use of the gas tank, the internal gas flow or pressure is at the normal value, the flow limiting core 5 does not move or moves upward by a certain distance, and the high-pressure gas inside the tank can normally enter the main valve body 1 from the intake pipe 2.
[0044] A number of air permeable through holes 31 are provided circumferentially on the lower limit sleeve 3. The high-pressure gas entering the main valve body 1 passes through the air permeable through holes 31 provided in the lower limit sleeve 3, along the air flow passage 10, and overflows from the air outlet end 12 provided on the side of the main valve body 1. The air outlet end 12 can be connected to a regulating valve or other gas-using equipment. The inner wall of the air outlet end 12 has threads.
[0045] When the liquefied gas tank has an overcurrent, the flow limiting valve in this application cooperates with the inner cavity of the main valve body 1 through the flow limiting core 5 to close the air flow passage 10, thereby completing the overcurrent cut-off of the liquefied gas tank and realizing the safety protection function when the gas tank has overpressure or overcurrent.
[0046] Specifically, under the action of overcurrent / overpressure gas, the current-limiting core 5 moves upward along the axis of the lower limiting sleeve 3, closing the end of the air flow channel 10. It should be noted that when the air pressure / flow rate is too large, this current-limiting valve will automatically close. On the contrary, when the air pressure is small, the automatic closing function will not be triggered.
[0047] In the daily actual use of this current-limiting valve, after the current-limiting valve is triggered and automatically closed, due to the internal air pressure of the gas tank, the current-limiting core 5 always maintains the sealing state of the air flow channel 10. Therefore, manual intervention is required to restore the original state. The trigger component 6 in this embodiment is located at the side end of the main valve body 1 and is in communication with the inside of the main valve body 1. The trigger component 6 is used to impact the current-limiting core 5 or cooperate with the stop portion 51 to prevent the current-limiting core 5 from moving closer to the opening and closing component 4 side, as Figure 3 、 Figure 4 shown.
[0048] In the trigger component 6 of the present utility model, after troubleshooting, by acting on the current-limiting core 5 through the trigger component 6, the current-limiting core 5 is shaken to generate a gap with the air flow channel 10, weakening the airtightness and allowing the air flow to circulate again to restore the normal use of this current-limiting valve.
[0049] In addition, when manufacturing this current-limiting valve and the corresponding tank body, relevant experiments and detection operations need to be carried out, and it is necessary to ensure that the automatic closing and flow-cutting function cannot be triggered to meet the requirements of detection and the like.
[0050] The stop portion 51 provided on the current-limiting core 5 can cooperate with the trigger component 6 to prevent the current-limiting core 5 from sliding upward relative to the lower limiting sleeve 3, avoiding the head of the current-limiting core 5 from closing the air flow channel 10, thereby meeting the requirements of exhausting or vacuuming during the detection operation of the gas tank and keeping the air flow channel 10 always open.
[0051] As Figure 3 、 Figure 5 、 Figure 6 shown, specifically, the stop portion 51 includes a convex block extending radially outward along the current-limiting core 5, and the top of the convex block has an arc-shaped groove 510 that cooperates with the trigger component 6.
[0052] Specifically, the trigger component 6 has a push rod 61 that acts on the current-limiting core 5. Before carrying out relevant experiments and detection operations, by pressing the trigger component 6, the push rod 61 extends to the radial side of the current-limiting core 5. During the upward movement of the current-limiting core 5 under the action of high-pressure gas, due to the action of the push rod 61 on the convex block, the upward movement of the current-limiting core 5 is blocked.
[0053] During the relevant test process, in order to maintain the cooperation between the push rod and the convex block, methods such as but not limited to clips, adhesive tapes or special tools can be used to apply force to the outer end of the push rod to keep it connected to the main valve body. After the relevant test is completed, the lateral movement restriction on the push rod is removed.
[0054] Different from opening an annular baffle on the current-limiting core 5, the setting of this bump can reduce the resistance of high-pressure gas in the air flow channel 10, making the gas flow smoother.
[0055] There is no specific limitation on the specific shape and quantity of this air-permeable through-hole 31, which may include but are not limited to a runway shape, a round-hole shape, etc.
[0056] As Figure 6 shown, in addition, the cross-sections of the lower limiting sleeve 3 and the current-limiting core 5 are polygon structures that are adaptable to each other.
[0057] The setting of the polygon structure can use a proprietary adjustment tool to be inserted from the bottom of the lower limiting sleeve 3 and turn the limiting core clockwise or counterclockwise to align the side stop portion 51 with the ejector rod 61 to achieve the structural purpose.
[0058] There is no specific limitation on the cross-sectional shapes of the lower limiting sleeve 3 and the current-limiting core 5, including but not limited to adaptable hexagon, pentagon, quadrilateral, triangle and other structures. In this embodiment, the cross-sections of the lower limiting sleeve 3 and the current-limiting core 5 adopt a hexagon structure.
[0059] One side of the trigger assembly 6 away from the main valve body 1 has a trigger end face 60, and the tail end of the ejector rod 61 extends out of the trigger end face 60.
[0060] As Figure 4 shown, an annular groove 610 (groove) is arranged on the circumference of the ejector rod 61. Since the overpressure / over-flow of high-pressure gas is a small-probability occurrence, while retaining the above trigger recovery function, in the normal use of this current-limiting valve and the gas cylinder using this current-limiting valve, to avoid the operator accidentally triggering and pressing this trigger assembly 6, causing the stop portion 51 to be blocked by the ejector rod 61, this trigger assembly 6 can be further improved. An annular groove 610 can be opened on the right side of the ejector rod 61. After exhausting or evacuating the gas cylinder, before leaving the factory, an external force is applied to the annular groove 610 and it is broken off. When the end user gets this current-limiting valve, the artificial intervention recovery function of the trigger assembly 6 for the current-limiting core 5 is still retained. If the air pressure is too high / there is an over-flow situation, an external tool, such as a pen / screwdriver, etc. can be used to apply force to the end of the ejector rod 61 to impact the main body of the current-limiting core 5 by the ejector rod 61 to restore the current-limiting valve to its initial state.
[0061] Since the annular groove 610 is located inside the trigger section, it can play an anti-triggering effect.
[0062] The present utility model also proposes a gas cylinder, which includes a current-limiting valve. The specific structure of this current-limiting valve refers to the above-mentioned embodiment. Since this gas cylinder adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated one by one here.
[0063] It should be noted that this current-limiting valve is used for high-pressure tanks, including but not limited to those used for liquefied petroleum gas.
[0064] The above-mentioned opening and closing assembly 4 and trigger assembly 6 are both prior arts. For the specific structures and connection forms, reference can be made to the technical solutions mentioned in the patent with the application number 202311462030X. The above connection methods can use prior arts and are also easy to implement, which do not fall within the protection scope of this application. Therefore, it at least has the beneficial effects brought by the technical solutions of the above embodiments and will not be elaborated here.
[0065] The above are only embodiments of the present utility model. Common general knowledge such as specific structures and characteristics well-known in the art are not described in detail herein. Those of ordinary skill in the art know all the common general knowledge in the technical field to which the utility model belongs before the filing date or the priority date, can know all the prior arts in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given by this application, combine their own abilities to complete and implement this solution. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent.
Claims
1. A current-limiting valve, characterized in that, Comprising: A main valve body, with an air flow channel formed inside; An intake pipe, provided at the intake end of the main valve body, and the outlet end of the intake pipe is communicated with the air flow channel; A lower limiting sleeve, provided in the air flow channel and abutted in the main valve body by the intake pipe; An opening and closing assembly, located at the top of the main valve body and communicated with the inside of the main valve body, for opening or closing the air flow channel; A flow limiting core, formed inside the lower limiting sleeve and the two can move axially relative to each other. The flow limiting core has a core head adapted to the upper end of the air flow channel and a stop portion provided on the side of the flow limiting core; A triggering assembly, located at the side end of the main valve body and communicated with the inside of the main valve body. The triggering assembly is used to impact the flow limiting core or cooperate with the stop portion to prevent the flow limiting core from moving towards the opening and closing assembly side.
2. The flow-limiting valve according to claim 1, wherein: The stop portion includes a convex block extending radially outward along the flow limiting core, and the top of the convex block has an arc-shaped groove for cooperating with the triggering assembly.
3. The current-limiting valve according to claim 1 or 2, characterized in that: The outer periphery of the bottom of the lower limiting sleeve has a limiting boss.
4. The flow-limiting valve according to claim 3, wherein: The intake end of the main valve body is provided with a positioning groove for cooperating with the limiting boss. Through the connection of the intake pipe to the main valve body, the limiting boss is abutted in the limiting boss by the intake pipe.
5. A flow-limiting valve according to claim 1 or 2 or 4, characterized in that: A plurality of air permeable through holes are provided circumferentially on the lower limiting sleeve.
6. The flow-limiting valve according to claim 5, characterized in that: The air permeable through holes are in a runway shape.
7. A flow-limiting valve according to claim 1 or 2 or 4 or 6, characterized in that: The cross section of the lower limiting sleeve and the flow limiting core is a polygonal structure adapted to each other.
8. The flow-limiting valve according to claim 7, wherein: The cross section of the lower limiting sleeve and the flow limiting core is a hexagonal structure adapted to each other.
9. A flow-limiting valve according to claim 1 or 2 or 4 or 6 or 8, characterized in that: The triggering assembly has a push rod acting on the flow limiting core. The triggering assembly has a triggering end face on the side away from the main valve body, and the tail end of the push rod extends out of the triggering end face.
10. An air tank, including a flow limiting valve, characterized in that: The flow limiting valve is the flow limiting valve according to any one of claims 1 to 9.