Manual steel cylinder valve with safety device
By adding a safety bursting mechanism consisting of a fusible plug and a rupture disc, along with a multi-layer diaphragm sealing ring, to the cylinder valve, the problems of insufficient sealing and unresponsiveness of existing cylinder valves are solved, thereby improving sealing performance and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-20
AI Technical Summary
The existing safety devices of gas cylinder valves are not airtight enough, are prone to leakage, and are not sensitive to response, resulting in insufficient safety.
A fusible plug and a rupture disc are added to the valve body to form a safety burst mechanism, and multiple layers of diaphragms and multiple sets of sealing rings are set inside to improve sealing performance.
It improves the sealing and safety of the cylinder valve, prevents gas leakage, ensures rapid response, and reduces safety hazards.
Smart Images
Figure CN224017743U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field, especially a manual steel cylinder valve with safety device. BACKGROUND
[0002] The gas cylinder valve is mainly used for the valve device of the gas storage tank, and various gas cylinders such as high-purity oxygen, high-purity nitrogen and high-purity hydrogen are often used in special industrial fields, and are switched and controlled through the gas cylinder valve, the inlet end of the valve gas cylinder valve is connected with the steel cylinder, and the outlet end is connected with the gas equipment or pipeline.
[0003] At present, many steel cylinder valves in the market do not have safety devices, and the structure of the steel cylinder valve with safety devices is relatively simple, so that the safety is insufficient. Specifically, the safety device is not airtight, gas leakage is prone to occur after long-term use, the safety device is not sensitive, and the response time of the safety device is slow when a safety problem occurs. Therefore, a new technical scheme needs to be designed to solve the problem. UTILITY MODEL CONTENTS
[0004] The utility model discloses a manual steel cylinder valve with safety device, the safety burst mechanism is formed to the valve body through the increase of the fusible plug and the bursting disc, and the overall sealing performance is improved through the cooperation of the multiple diaphragms and multiple sealing rings arranged in the inside, so that the use safety of the steel cylinder valve is improved.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A manual steel cylinder valve with safety device, comprising a valve body, a valve cap, a valve rod, a hand wheel, a plug core, a fusible plug, characterized by: the valve body is a side "ten" shape hollow core structure, the valve cap is arranged in the inside of the valve body, and the outer wall of the valve cap is threadedly connected with the inner wall of the upper port of the valve body, the valve rod is arranged in the inside of the valve cap, the outer wall of the valve rod is threadedly connected with the inner wall of the valve cap, the hand wheel is arranged at the top of the valve rod and is fixedly connected with the valve rod through a nut, the inside of the valve body at the lower part of the valve rod is sequentially provided with a steel ball, a piston, a pressure ring, a diaphragm and a valve flap from top to bottom, a first flow channel opening is arranged at the lower part of the valve body, a second flow channel opening and a safety detection opening are arranged on the two side surfaces of the valve body respectively, and the second flow channel opening and the safety detection opening are arranged in communication with the first flow channel opening.
[0007] Further, a first sealing ring is arranged between the outer wall surface of the valve cap and the inner wall surface of the valve body, and a second sealing ring is arranged between the outer wall surface of the valve rod and the inner wall surface of the valve cap.
[0008] Further, the bottom of the valve rod is movably connected with the upper part of the piston, and the steel ball is arranged above the piston in the valve rod.
[0009] Further, the middle part of the piston is movably connected with the inner side wall of the bottom of the valve cap, and a third sealing ring is arranged between the outer side wall of the middle part of the piston and the inner side wall of the bottom of the valve cap.
[0010] Further, the compression ring is arranged at the lower part of the piston, and the diaphragm is arranged in layers, and the diaphragm is arranged at the bottom of the compression ring.
[0011] Further, the valve flap is in a "convex" structure, the convex part of the upper part of the valve flap penetrates the diaphragm and the compression ring, and is fixedly connected with the lower part of the piston.
[0012] Further, a sealing gasket is arranged between the inner end face of the plug core and the second flow channel port, the plug core is externally provided with a plug cap, the plug cap is threadedly connected with the valve body, the plug core externally penetrates the plug cap and is provided with a shaft steel wire retainer ring at the extending end.
[0013] Further, the fusible plug is threadedly connected with the safety detection port, and an explosion disc is arranged between the inner end face of the fusible plug and the safety detection port.
[0014] The utility model has the advantages that:
[0015] 1. A manual steel cylinder valve with a safety device, the piston is movably connected with the valve rod, so that the piston moves up and down with the valve rod, and the valve flap is fixedly connected with the piston and moves up and down, thereby conveniently completing up and down adjustment; a plurality of diaphragms are arranged at the lower part of the piston, so that corrosive medium flow is prevented from flowing to the upper part of the valve body and corroding the internal components of the valve body during use, the sealing performance of the valve body is improved, and the flow rate can be accurately controlled when the piston moves up and down.
[0016] 2. A manual steel cylinder valve with a safety device, a safety explosion mechanism is formed by the fusible plug and the explosion disc arranged on the valve body, when the pressure and temperature in the valve body exceed the bearing range, the explosion disc explodes and damages the fusible plug, thereby releasing the pressure in the valve body, reducing the risk, and improving the safety of the steel cylinder valve; the sealing performance of the steel cylinder valve is improved by the cooperation of the first sealing ring, the second sealing ring and the third sealing ring, and the medium outside the valve body is prevented from entering the valve body and polluting the controlled medium. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a cross-sectional view of the utility model. DETAILED DESCRIPTION
[0018] The principles and features of the present application are described below in conjunction with the accompanying drawings, in which the examples are used to explain the present application, but are not intended to limit the scope of the present application. In the following paragraphs, the present application is described in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present application will be more apparent from the following description and claims. It should be noted that the drawings are very simplified and use non-precise proportions, only to facilitate, clarify the purpose of assisting the description of the embodiments of the present application.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0020] As shown in Figure 1 The present application is a manual steel cylinder valve with a safety device, 1, including valve body 1, valve cap 2, valve stem 3, hand wheel 4, plug core 14, fusible plug 17, valve body 1 is a side "ten" hollow structure, valve cap 2 is arranged inside the valve body 1, and the outer wall of the valve cap 2 is threadedly connected with the inner wall of the upper port of the valve body 1, the valve stem 3 is arranged inside the valve cap 2, the outer wall of the valve stem 3 is threadedly connected with the inner wall of the valve cap 2, the hand wheel 4 is arranged at the top of the valve stem 3 and is fixedly connected with the valve stem 3 through the nut 10, the inside of the valve body 1 below the valve stem 3 is sequentially provided from top to bottom with a steel ball 7, a piston 5, a compression ring 6, a diaphragm 9 and a valve clack 8, the lower port of the valve body 1 is provided with a first flow channel 100, the two side surfaces of the valve body 1 are respectively provided with a second flow channel 110 and a safety detection port 120, the second flow channel 110 and the safety detection port 120 are throughly arranged between the first flow channel 100, the plug core 14 is arranged outside the second flow channel 110, and the fusible plug 18 is arranged outside the safety detection port 120.
[0021] The outer wall surface of the valve cap 2 and the inner wall surface of the valve body 1 are provided with a first sealing ring 11, and the outer wall surface of the valve stem 3 and the inner wall surface of the valve cap 2 are provided with a second sealing ring 12. The cooperation of multiple sealing rings improves the sealing performance of the steel cylinder valve, avoiding the pollution of the controlled medium by the medium outside the valve body.
[0022] The bottom of the valve stem 3 is movably connected with the upper part of the piston 5, the steel ball 7 is arranged above the piston 5 in the valve stem 3, the piston 5 moves up and down along with the valve stem 3, the valve disc 8 is fixedly connected with the piston 5 and moves up and down along with the piston 5, the upper part of the piston 5 is movably connected with the inner wall of the bottom of the valve bonnet 2, the third sealing ring 13 is arranged between the outer wall of the middle part of the piston 5 and the inner wall of the bottom of the valve bonnet 2, the compression ring 6 is arranged at the lower part of the piston 5, the diaphragm 9 is arranged at the bottom of the compression ring 6, the valve disc 8 is in a "convex" shape, the convex part of the upper part of the valve disc 8 penetrates the diaphragm 9 and the compression ring 6 and is fixedly connected with the lower part of the piston 5, the piston 5 moves up and down along with the valve stem 3, the valve disc 9 moves up and down along with the piston 5, and the piston 5 moves up and down to conveniently complete up and down adjustment; the multiple diaphragms 9 arranged at the lower part of the piston 5 can prevent corrosive medium from flowing to the upper part of the valve body and corroding the internal components of the valve body, improve the sealing performance of the valve body, and accurately control the flow rate when the piston moves up and down.
[0023] The sealing gasket 15 is arranged between the inner end face of the plug core 14 and the second flow channel port 110, the plug core 15 is externally provided with the plug cap 16, the plug cap 16 is threadedly connected with the valve body 1, the plug core 15 externally penetrates the plug cap 16 and is provided with the shaft steel wire retainer ring 17 at the extending end, the sealing gasket 15 is arranged in the plug cap 16 to prevent leakage, and the shaft steel wire retainer ring 17 is arranged at the outer end of the plug cap 16 to prevent the plug cap 16 from falling off.
[0024] The fusible plug 18 is threadedly connected with the safety detection port 120, the bursting disc 19 is arranged between the inner end face of the fusible plug 18 and the safety detection port 120, the safety bursting mechanism is formed by arranging the fusible plug and the bursting disc on the valve body, when the pressure and temperature in the valve body exceed the bearing range, the bursting disc explodes and damages the fusible plug, thereby releasing the pressure in the valve body, reducing the danger, and improving the safety of the cylinder valve.
[0025] The above only describes the preferred embodiments of the present application, and equivalent changes or modifications made according to the structure, features and principles described in the patent application range of the present application are included in the patent application range of the present application.
Claims
1. A manual cylinder valve with a safety device, comprising a valve body (1), a valve cap (2), a valve stem (3), a handwheel (4), a plug (14), and a fusible plug (18), characterized in that: The valve body (1) has a side "plus" - shaped hollow structure. The valve cap (2) is arranged inside the valve body (1), and the outer wall of the valve cap (2) is thread - connected to the inner wall of the upper port of the valve body (1). The valve stem (3) is arranged inside the valve cap (2), and the outer wall of the valve stem (3) is thread - connected to the inner wall of the valve cap (2). The handwheel (4) is arranged at the top of the valve stem (3) and is fixedly connected to it through a nut (10). Inside the valve body (1) below the valve stem (3), a steel ball (7), a piston (5), a pressure ring (6), a diaphragm (9), and a valve flap (8) are successively arranged from top to bottom. The lower port of the valve body (1) is provided with a first flow port (100), and the two side surfaces of the valve body (1) are respectively provided with a second flow port (110) and a safety detection port (120). The second flow port (110) and the safety detection port (120) are in through - connection with the first flow port (100). The plug core (14) is arranged outside the second flow port (110), and the fusible plug (18) is arranged outside the safety detection port (120).
2. A manual cylinder valve with a safety device according to claim 1, characterized in that: A first sealing ring (11) is arranged between the outer wall surface of the valve cap (2) and the inner wall surface of the valve body (1), and a second sealing ring (12) is arranged between the outer wall surface of the valve stem (3) and the inner wall surface of the valve cap (2).
3. A manual cylinder valve with a safety device according to claim 1, characterized in that: The bottom of the valve stem (3) is movably buckled with the upper part of the piston (5), and the steel ball (7) is arranged above the piston (5) inside the valve stem (3).
4. A manual cylinder valve with a safety device according to claim 1, characterized in that: The middle part of the piston (5) is movably fitted and connected to the inner side wall of the bottom of the valve cap (2), and a third sealing ring (13) is arranged between the outer side wall of the middle part of the piston (5) and the inner side wall of the bottom of the valve cap (2).
5. A manual cylinder valve with a safety device according to claim 3, characterized in that: The pressure ring (6) is arranged below the piston (5), and the diaphragm (9) is arranged in a number of stacked layers and is arranged at the bottom of the pressure ring (6).
6. A manual cylinder valve with a safety device according to claim 4, characterized in that: The valve flap (8) has a "convex" - shaped structure, and the protrusion on the upper part of the valve flap (8) penetrates through the diaphragm (9) and the pressure ring (6) and is fixedly connected to the lower part of the piston (5).
7. A manual cylinder valve with a safety device according to claim 1, characterized in that: A sealing gasket (15) is arranged between the inner end face of the plug core (14) and the second flow port (110). A plug cap (16) is arranged outside the plug core (14), and the plug cap (16) is thread - connected to the valve body (1). The outside of the plug core (14) penetrates through the plug cap (16) and the protruding end is provided with a shaft - type wire retaining ring (17).
8. A manual cylinder valve with a safety device according to claim 1, characterized in that: The fusible plug (18) is thread - connected to the safety detection port (120), and a bursting disc (19) is arranged between the inner end face of the fusible plug (18) and the safety detection port (120).