CN216975901U - Built-in full-open type spring safety valve for tank car - Google Patents
Built-in full-open type spring safety valve for tank car Download PDFInfo
- Publication number
- CN216975901U CN216975901U CN202122920504.3U CN202122920504U CN216975901U CN 216975901 U CN216975901 U CN 216975901U CN 202122920504 U CN202122920504 U CN 202122920504U CN 216975901 U CN216975901 U CN 216975901U
- Authority
- CN
- China
- Prior art keywords
- valve
- spring
- built
- full
- safety valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a built-in full-open type spring safety valve for a tank car, which comprises a valve body, a valve clack, a valve rod and a valve cover, wherein the valve cover is arranged above the valve body; the lower part of the valve rod is connected with a lower spring support, a first spring and a second spring are arranged between the lower spring support and the valve body, and the first spring and the second spring form a double-spring structure; a recoil disc is arranged at the upper part of the valve rod, and a sealing ring is arranged between the recoil disc and the valve clack; the valve cover is provided with a limit screw corresponding to the valve rod; the utility model has good corrosion resistance, prolongs the service life and has reliable sealing.
Description
Technical Field
The utility model relates to a safety valve, in particular to a built-in full-open type spring safety valve which is mainly applied to railway tank cars and automobile tank cars.
Background
The safety valve is used as a safety accessory matched with a railway tank car and a car tank car, when the pressure in the tank rises to exceed an allowable value, the valve clack needs to be opened and then fully discharged to prevent the pressure from continuing rising, and when the pressure is reduced to a specified value, the valve needs to be closed to protect the safety of equipment. In the prior art, the safety valve used in cooperation with a railway tank car and a car tank car is designed to be a single spring, so that the safety valve is long, the safety valve extends into the tank body below the liquid level, a medium filled in the tank body can corrode the spring to a certain extent, the fatigue resistance of the spring can be reduced after a long time, and even the spring is broken. The sealing material is made of rubber materials, has the characteristics of wide application temperature range, excellent corrosion resistance and the like, but has cold flow tendency under the action of load, is easy to generate permanent deformation and collapse, has large linear expansion coefficient, and cannot keep stable size when the temperature is changed rapidly. Especially on a low-pressure and large-caliber safety valve, the performance of the product cannot be ensured.
SUMMERY OF THE UTILITY MODEL
The utility model provides a built-in full-open type spring safety valve aiming at the problems in the prior art, and solves the problem that the safety valve in the prior art is easy to corrode and deform.
The technical scheme adopted by the utility model for solving the technical problem is as follows:
a built-in full-open type spring safety valve comprises a valve body, a valve clack, a valve rod and a valve cover, wherein the valve cover is arranged above the valve body; the lower part of the valve rod is connected with a lower spring support, a first spring and a second spring are arranged between the lower spring support and the valve body, and the first spring and the second spring form a double-spring structure; a recoil disc is arranged at the upper part of the valve rod, and a sealing ring is arranged between the recoil disc and the valve clack; and the valve cover is provided with a limit screw corresponding to the valve rod.
The bottom end of the valve rod is connected with a locking nut, and a lead seal is arranged below the locking nut.
The first spring and the second spring have different sizes.
The clamping surface of the recoil disc and the valve clack is a stepped conical surface, and the sealing rings are respectively arranged on the stepped table surface.
The sealing ring is an O-shaped rubber sealing ring.
And a dustproof protective cap is sleeved above the valve cover.
After the valve body is installed, the height of the part, exposed out of the tank body, of the integral shell of the valve body is 112 mm.
The utility model has the beneficial effects that:
when the pressure in the tank rises and exceeds an allowable value, the valve clack is opened and then is discharged in full quantity so as to prevent the pressure from rising continuously, and when the pressure is reduced to a specified value, the valve is closed so as to protect the safety of equipment. The design of the safety valve accords with the standard regulation of HG 3157 spring safety valve for liquefied gas tank car and GB/T12243 spring diameter load type safety valve, and has the advantages of novel structure, stable performance and reliable sealing, the safety valve is opened and discharged by compressing a spring, a valve rod assembly moves up and down through a valve body guide hole, a valve clack of the safety valve adopts a metal and nonmetal double sealing structure, wherein, the metal and metal conical surface sealing not only has the sealing function but also has the positioning and guiding functions, thereby ensuring the stable and moderate sealing specific pressure of the metal and nonmetal secondary sealing, and the sealing is more reliable. The spring adopts the design of double springs, the structure length is greatly reduced, and the corrosion of the spring caused by media is avoided. The height of the part of the safety valve exposed out of the tank body after the spring is installed is 112mm, and accidental collision and impact of products during operation of the liquefied gas tank truck can be effectively prevented and reduced. The upper end of the safety valve is provided with a limit screw, when an accident occurs and the valve leaks, the limit screw is screwed by using an adjustable wrench to prop against the valve rod to achieve sealing, and unnecessary loss is avoided.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-lead seal, 2-lock nut, 3-lower spring support, 4-first spring, 5-second spring, 6-valve body, 7-valve rod, 8-valve clack, 9-first O-shaped rubber sealing ring, 10-second O-shaped rubber sealing ring, 11-recoil disc, 12-limit screw, 13-valve cover, 14-dustproof protective cap.
Detailed Description
Examples
As shown in the figure, the built-in full-open type spring safety valve comprises a valve body 6, a valve rod 7 and a valve cover 13, wherein the valve cover 13 is arranged above the valve body 6, a valve clack 8 is welded at the upper part of the valve rod, the valve rod 7 is movably arranged in the valve body 6, and the valve rod 7 moves up and down through a guide hole of the valve body; the lower part of the valve rod 7 is in threaded connection with a lower spring support 3, the lower spring support 3 is fastened with the valve rod through a locking nut 2, and a lead seal 1 is arranged below the locking nut. Install first spring 4 and second spring 5 between lower spring support 3 and the valve body, first spring 4 and second spring 5 size are inequality, and first spring 4 and second spring 5 constitute the double spring structure, and when the valve rod shifts up, lower spring support 3 shifts up along with the valve rod, compresses the double spring. A recoil disc 11 is arranged at the upper part of the valve rod, and an O-shaped rubber sealing ring is arranged between the recoil disc and the valve clack 8; and the valve cover is provided with a limit screw 12 corresponding to the valve rod. The upper part of the valve cover is sleeved with a dustproof protective cap 14.
The clamping surface of the recoil disc and the valve clack is a stepped conical surface, and the first O-shaped rubber sealing ring 9 and the second O-shaped rubber sealing ring 10 are respectively arranged on the stepped table surface.
After the valve body is installed, the height of the part, exposed out of the tank body, of the integral shell of the valve body is 112 mm.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the present invention should not be construed as limited to the particular embodiments set forth herein.
Claims (7)
1. A built-in full-open type spring safety valve for a tank car comprises a valve body, a valve clack, a valve rod and a valve cover, wherein the valve cover is arranged above the valve body; the double-spring valve is characterized in that the lower part of the valve rod is connected with a lower spring support, a first spring and a second spring are arranged between the lower spring support and the valve body, and the first spring and the second spring form a double-spring structure; a recoil disc is arranged at the upper part of the valve rod, and a sealing ring is arranged between the recoil disc and the valve clack; and the valve cover is provided with a limit screw corresponding to the valve rod.
2. The built-in full-open type spring safety valve for the tank car as claimed in claim 1, wherein the bottom end of the valve rod is connected with a locking nut, and a lead seal is arranged below the locking nut.
3. The safety valve of claim 1, wherein the first spring and the second spring are of different sizes.
4. The safety valve with built-in full-open spring for tank truck as claimed in claim 1, wherein the engagement surface between the recoil disc and the valve flap is a stepped conical surface, and the sealing rings are respectively disposed on the stepped surfaces.
5. The built-in full lift spring safety valve for a tank car according to claim 1, wherein said seal is an O-ring rubber seal.
6. The built-in full-open spring safety valve for the tank truck as claimed in claim 1, wherein a dust-proof protective cap is sleeved on the upper part of the valve cover.
7. The safety valve of claim 1, wherein the height of the portion of the valve body that is exposed from the tank body is 112mm after the valve body is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122920504.3U CN216975901U (en) | 2021-11-25 | 2021-11-25 | Built-in full-open type spring safety valve for tank car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122920504.3U CN216975901U (en) | 2021-11-25 | 2021-11-25 | Built-in full-open type spring safety valve for tank car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216975901U true CN216975901U (en) | 2022-07-15 |
Family
ID=82345470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122920504.3U Active CN216975901U (en) | 2021-11-25 | 2021-11-25 | Built-in full-open type spring safety valve for tank car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216975901U (en) |
-
2021
- 2021-11-25 CN CN202122920504.3U patent/CN216975901U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2883320Y (en) | Closed liquid down oil filling riser | |
| CN101289135B (en) | Respiration valve | |
| CN201646610U (en) | Automatic protection device of dump truck hydraulic pipeline | |
| CN104373603A (en) | Hidden rod type ultralow temperature stop valve with upper sealing structure, lower sealing structure and pressure relief device | |
| CN216975901U (en) | Built-in full-open type spring safety valve for tank car | |
| CN208331361U (en) | A kind of petroleum pipeline explosion relief valve | |
| CN202402735U (en) | Safety valve convenient to overhaul | |
| CN208364498U (en) | Lined piston power accumulator with alarm function | |
| CN214248113U (en) | Single-cylinder shock absorber sealed by nut body | |
| CN214331055U (en) | Hydraulic cylinder unloading structure | |
| CN2933939Y (en) | Explosion-proof oil tank | |
| CN113757422A (en) | Safety valve for low-temperature and low-pressure working condition | |
| CN204153161U (en) | The seal arrangement of dark bar ultralow temperature stop valve | |
| CN204985875U (en) | Tear integral type liquefied gas filling opening in quick open | |
| CN211082978U (en) | Hard-seal fuel oil back pressure valve of diesel engine | |
| CN202646819U (en) | Special high pressure safety valve for oil field | |
| CN201358797Y (en) | Double telescoping type suspension air-permeable individual hydraulic prop | |
| CN109958802B (en) | Low-pressure fine-tuning built-in dead weight type safety valve | |
| CN219570977U (en) | Long-life gas safety valve | |
| CN110645209A (en) | Wound form energy storage ware | |
| CN221171772U (en) | Gas cylinder | |
| CN218031215U (en) | Light cassette seat attenuator | |
| CN112696514B (en) | LNG (liquefied Natural gas) heat-insulating gas cylinder pressurization and pressure regulation valve for vehicle | |
| CN221076124U (en) | Integrated composite material LPG cylinder | |
| CN216743033U (en) | Well-sealed vibration-damping overflow valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |