CN108930804A - Valve base of safety valve and its component for transportable pressure vessel - Google Patents
Valve base of safety valve and its component for transportable pressure vessel Download PDFInfo
- Publication number
- CN108930804A CN108930804A CN201811125057.9A CN201811125057A CN108930804A CN 108930804 A CN108930804 A CN 108930804A CN 201811125057 A CN201811125057 A CN 201811125057A CN 108930804 A CN108930804 A CN 108930804A
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- Prior art keywords
- valve
- safety valve
- seat
- guide portion
- base
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 13
- 238000009434 installation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0426—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with seat protecting means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0433—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with vibration preventing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of valve base of safety valve and its component for transportable pressure vessel, the valve base of safety valve includes pedestal, multiple location holes are opened up in the upper surface of pedestal, location hole is used to cooperate with the end cap of safety valve, and wherein safety valve and valve base of safety valve match；And cylindrical cavity, cavity run through pedestal, location hole is arranged around cavity, and cavity includes seat threaded area, and seat threaded area is located at the top of cavity, and close to opening, the screw thread of seat threaded area is straight thread, and valve base of safety valve is fixedly connected with its safety valve by straight thread；And seat guide portion, seat guide portion are fixedly connected with seat threaded area lower part, the height of seat guide portion is the 1/3-2/3 of straight thread outer diameter.The present invention can disassemble and install repeatedly, and structure is simple, light-weight, be sealed.
Description
Technical field
The present invention relates to machinery field, relate more specifically to a kind of valve base of safety valve for transportable pressure vessel and its
Component.
Background technique
By taking liquefied gas truck tank as an example, general liquefied gas truck tank relief valve assembly is more currently on the market
For flange form connection, this type of attachment, convenient disassembly repeatedly is installed, it is therefore an objective to be met requirements of the national standard, be provided such
The relief valve assembly of type, it is necessary to be verified, be detected every year.
But flange form connects, and has following deficiency:
(1) flanged joint, so that safety valve can protrude the certain height of top of the tank, when tank car crosses tunnel or culvert etc.
When, safety valve will receive collision, or even damage and unexpected pressure release, cause danger.Such case on tank car at home to have more
Occur.
(2) flanged joint makes valve body of safety valve too heavy, both uneconomical to increase the weight of integral valve, also because
The increase of weight, resistance to shock decline.
(3) flanged joint, seal form mostly use biggish sealing ring, the form of end face seal.Big sealing ring, then
It is bigger to bear pressure caused by the pressure of LPG gas, it is higher to the intensity requirement of valve body and groove tank interface.Meanwhile to end face
The compression force request of sealing is also higher, because of end face seal, slightly loosening or sealing ring slightly creep can generate leakage.
(4) flanged joint, the either sealing surface of the flange sealing surface of safety valve or groove tank interface are all exposed to outer
Face, it is easy to cause to damage in disassembly repeatedly is examined, and lead to seal failure, leak.
(5) flanged joint, positioned at the intracorporal arranged at safety valve of tank in integrated suspension state, since the volume of valve is big, weight weight,
In the case where tank car jolts or turns on one's side, it is easy to cause the great quality accidents such as valve body of safety valve fracture.
Another type of attachment connects for taper thread (such as NPT screw thread).This type of attachment, sealed reliable, valve body body
Product is small, light-weight.But this type of attachment is not able to satisfy the requirement dismantled repeatedly.It is external generally to use this type of attachment, because
For foreign standard regulation, such safety valve can do a dissembling inspection with 5 years or 10 years.This is every with domestic standard regulation
The requirement of year necessary dissembling inspection, enters and leaves very big.So taper thread connects, it is generally not suitable for domestic application.
Therefore, this field still lacks one kind and can disassemble and install repeatedly, and structure is simple, light-weight, and what is be sealed is used for
The valve base of safety valve and its component of transportable pressure vessel.
Summary of the invention
The purpose of the present invention is to provide one kind to be used for transportable pressure vessel valve base of safety valve and its component, can be used for
Tank car, truck tank, long-tube trailer, tank container and the tube bank of the media such as storage and transport LPG, anhydrous ammonia and propane
The transportable pressure vessels such as formula container as its safety attachment, and are particularly suitable for the overvoltage protection of moving pressure container, this hair
Bright valve base of safety valve and its component can disassemble and install repeatedly, and structure is simple, light-weight, be sealed.
In the first aspect of the present invention, a kind of valve base of safety valve for transportable pressure vessel is provided, it specifically, should
Valve base of safety valve includes pedestal, opens up multiple location holes in the upper surface of pedestal, and location hole is used to cooperate with the end cap of safety valve,
Wherein safety valve and valve base of safety valve match；And cylindrical cavity, cavity run through pedestal, location hole is set around cavity
It sets, cavity includes seat threaded area, and seat threaded area is located at the top of cavity, and close to opening, the screw thread of seat threaded area is straight thread,
Valve base of safety valve is fixedly connected with its safety valve by straight thread；And seat guide portion, seat guide portion and seat threaded area lower part are solid
Fixed connection, the height of seat guide portion are the 1/3-2/3 of straight thread outer diameter.
In another preferred example, the quantity of location hole is 2-5.
In another preferred example, multiple location holes are distributed on the same circumference centered on the axle center of cylindrical cavity.
In another preferred example, the aperture of location hole is 3-10mm；Preferably, 4-8mm；More preferably, 5mm.
In another preferred example, be provided in the opening with the second road sealing device, the second road sealing device be stuffing-box or
The gasket seal of fire-proof and dust-proof.
In another preferred example, the quantity of location hole is two, and the angle theta between two location holes is 5-15 °；It is preferred that
Ground, 7-13 °；More preferably, 8-12 °.
It should be noted that angle theta refers to centered on the axle center of cylindrical cavity, a bolt hole and center institute Cheng Zhi
Line and another bolt hole and center acute angle in straight angle.
A kind of valve base of safety valve component for transportable pressure vessel is provided in the second aspect of the present invention, specifically
Ground, component include safety valve and above-mentioned valve base of safety valve；Safety valve includes end cap, and end cap is located at the upper end of safety valve, end
It covers and is equipped with mounting hole；Threaded area, threaded area are fixedly connected with end cap lower part, and the outer surface of threaded area is equipped with straight thread, safety
Valve is fixedly connected with its valve base of safety valve by straight thread；Guide portion, guide portion are fixedly connected with threaded area lower part, guide portion
Height is the 1/3-2/3 of threaded area straight thread outer diameter, is equipped with annular groove in the periphery of guide portion, annular groove is for accommodating O-ring；And
Valve function body, valve function body are fixedly connected with guide portion lower part, for over-voltage dielectric gas in pressure vessel to be released out
Pressure vessel.
In another preferred example, guide portion is guide cylinder.
In another preferred example, the high 0.5-2.0cm of end cap.
In another preferred example, the aperture of mounting hole is 90-120mm.
In another preferred example, the finish of guide portion wall surface is less than 1.6.
In another preferred example, for safety valve by O-ring radial seal, safety valve includes O-ring retaining ring, O-ring retaining ring
For preventing O-ring to be squeezed and deformed, overflowing and even cut.
In another preferred example, the quantity of annular groove is 1-3, and each annular groove is equipped with matched O-ring.
In another preferred example, the distance between O-ring and threaded area lower end are the 1/3-2/3 of guide portion height.
In another preferred example, the distance between O-ring and threaded area lower end are the 1/3-1/2 of guide portion height.
In another preferred example, O-ring retaining ring accommodates in a groove, and O-ring retaining ring is in the top of O-ring.
It should be noted that O-ring seal and its retaining ring are located at the lower section of screw thread, and the groove tank interface with O-ring sealing
The cylindrical body matched can design longer, so, can both guarantee that safety valve was in use, screw thread does not contact gas
Medium or other impurities avoid surface corrosion or screw thread stress corrosion, and can guarantee when screw thread has slight loosening, O-ring
Slight moves up and down, and does not influence radial seal effect, still can guarantee to seal No leakage.The peace in addition, O-ring seal is sunk
Dress, can prevent tank body in the case of fire, damage sealing ring because temperature is excessively high.
In another preferred example, O-ring is first of sealing of safety valve.
In another preferred example, safety valve is equipped with the second road sealing device at end cap, and the second road sealing device is filler
The gasket seal of letter or fire-proof and dust-proof.
In another preferred example, the diameter of end cap is greater than the aperture with the matched valve base of safety valve of safety valve.
In another preferred example, end cap is equipped with flange, and the second road sealing device is arranged between flange and valve base of safety valve.
In another preferred example, the outer peripheral edge of end cap is equipped with the equally distributed groove of annular, and groove is used for and safety valve valve
Location hole cooperation on seat, and then prevent screw thread from loosening because of vibration.
In another preferred example, groove is circular groove.
In another preferred example, groove refers to the location hole cooperation on valve base of safety valve: groove with location hole is mutually suitable
Shape, and plug-in unit (such as: screw, pin, bolt etc.) it passes through in groove insertion location hole；Groove engages pass with plug-in unit formation simultaneously
System, plug-in unit stop the rotation of end cap, and then play fastening effect, prevent screw thread from loosening because of vibration.
In another preferred example, groove is uniformly distributed with 5 ° -30 ° of angle interval.
It in another preferred example, can be at 1/2 point by cooperating two to three location holes of declinate distribution on valve base of safety valve
Locking matching is completed in cloth angle (2.5 ° -15 °) range.
In another preferred example, mounting hole is interior octagonal structure, not only saves space, but also can prevent from arbitrarily dismantling.
In another preferred example, mounting hole is interior hexagonal structure.
In another preferred example, end cap, threaded area, guide portion and valve function body are integrated or integrally formed.
In another preferred example, plug-in unit passes through in groove insertion location hole, and plug-in unit is screw, pin or bolt.
In another preferred example, valve function body includes valve rod, and valve rod is arranged along the central axis of safety valve；Main valve seat,
Main valve seat is fixedly connected with the lower part of guide portion, for fixed support valve rod；Locking nut, locking nut is for fixing valve rod
In main valve seat；Outlet passageway, outlet passageway are fixedly connected with the lower end of main valve seat, for acquiring the overpressure gases in pressure vessel
Medium simultaneously gives off pressure vessel in time, prevents over-voltage；Spring, spring are surrounded on the periphery of valve rod, one end of spring and outlet
The lower end in channel leans；And lock nut, lock nut are used for the other end of holddown spring.
In another preferred example, spring is the spring with high-fineness ratio, and the spring with high-fineness ratio had both reduced peace
The overall volume of full valve, and the stress fracture risk of spring is reduced, and under identical operating condition, the Lift of valve base of safety valve
It is bigger, possess bigger emission flow.
In another preferred example, the slenderness ratio of spring is greater than 5.
In another preferred example, primary seal pad is equipped between locking nut and main valve seat, and primary seal pad is close to outlet
Channel, primary seal pad are contacted and are compacted with main valve seat under the action of the spring, for providing the interior sealing of safety valve, work as pressure
When container inner medium pressure is less than safety valve setting pressure, primary seal pad contacts sealing with main valve seat；When medium in pressure vessel
When pressure is greater than safety valve setting pressure, primary seal pad is separated with main valve seat, and overpressure gases medium is by outlet passageway through main valve seat
And container is discharged in the gap of primary seal pad.
In another preferred example, elongated valve function body is equipped with guide sleeve, and valve rod is maintained in guide sleeve by guide sleeve,
Effectively to control beat, the bias of valve rod and valve function body.
In another preferred example, spring inner is equipped with guide sleeve, prevents spring beat due to vibration.
In another preferred example, the hold-doun nut for connecting valve rod both ends enhances the reliability of valve using locking processing.
It should be understood that above-mentioned each technical characteristic of the invention and having in below (eg embodiment) within the scope of the present invention
It can be combined with each other between each technical characteristic of body description, to form a new or preferred technical solution.As space is limited, exist
This no longer tires out one by one states.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the top view of the valve base of safety valve (location hole there are two setting) in an example of the invention；
Fig. 2 is the cross-sectional view of the valve base of safety valve in an example of the invention；
Fig. 3 is the cross-sectional view of the safety valve in an example of the invention；
Fig. 4 is the enlarged drawing of the C portion in Fig. 3；
The partial sectional view after the assembly of valve base of safety valve component in Fig. 5 one example of the present invention；
Fig. 6 is the valve base of safety valve in Fig. 1 and the top view after safety valve assembly；
Fig. 7 is the top view of the valve base of safety valve (location hole there are three setting) in an example of the invention；
Fig. 8 is the valve base of safety valve in Fig. 7 and the top view after safety valve assembly.
In each attached drawing, each mark is as follows:
1- end cap；
The threaded area 2-；
The guide portion 3-；
4-O type circle；
5-O type circle retaining ring；
6- valve function body；
7- valve rod；
8- main valve seat；
9- locking nut；
10- outlet passageway；
11- spring；
12- lock nut；
13- guide sleeve；
14- guide sleeve；
15- primary seal pad；
16- gasket seal；
17- mounting hole；
18- valve base of safety valve；
19- safety valve；
20- gasket；
21- check bolt；
22- location hole；
23- pedestal；
24- cavity；
25- threaded areas；
26- guide portions.
Specific embodiment
The present inventor after extensive and in-depth study, by largely screening, develops a kind of for mobile pressure for the first time
The valve base of safety valve and its component of force container, compared with prior art, valve base of safety valve of the invention are equipped with straight thread structure, make
Obtaining the safety valve assembled with it can disassemble and install repeatedly；And screw thread is sunk type installation, effectively reduces safety valve and is exposed to
Part outside transportable pressure vessel, safe transportation, sealing effect are more preferable；Relief valve assembly uses O-ring radial seal, right
The intensity requirement of valve body and groove tank interface is lower；It is realized by the location hole being arranged on valve base of safety valve to the effective of safety valve
Fastening, completes the present invention on this basis.
Main advantages of the present invention include:
1) present invention is straight thread structure, and screw thread does not have sealing function, is only used for locking, can dismantle and pacify repeatedly
Dress；
2) screw thread of the invention is sunk type installation, so that safety valve is flushed with top of the tank, overall safety valve is respectively positioned on
In groove tank, when tank car crosses tunnel or culvert etc., safety valve will not be collided, to considerably increase the peace in valve use
Quan Xing；
3) present invention substantially reduces valve body of safety valve weight, to increase the economy of integral valve, also enhances it
Resistance to shock；
4) seal form of the invention uses O-ring radial seal, produced by the pressure for bearing LPG or other dielectric gas
Pressure very little, it is lower to the intensity requirement of valve body and groove tank interface；
5) position is hidden since the sealing surface of seal groove and tank body interface is located at, safety valve of the invention is not readily susceptible to touch
It touches, is more conducive to the disassembly and installation repeatedly of valve, prevent seal failure caused by maloperation, leak；
6) the invention enables the fixation and protection of the cylindrical body that are located at the intracorporal safety valve of tank and are matched by groove tank interface,
In the case where tank car jolts or turns on one's side, valve body of safety valve not will cause the great quality accidents such as fracture；
7) present invention by equally distributed outer rim fixed groove, can be easy to by safety valve with and its cooperate safety
Valve base is fixed together, and prevents valve main thread from loosening and causing to leak；
8) valve base of safety valve of the invention is on Integral welded to pressure vessel, and small in size, welding is simple, reliable,
It is connected relative to flange form, weld seam is short, and welding quality is easier to control.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, attached drawing is schematic diagram, therefore apparatus of the present invention and equipment are not shown by described
The size or ratio of intention limit.
It should be noted that in the claim and specification of this patent, such as first and second or the like relationship
Term is only used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying
There are any actual relationship or orders between these entities or operation.Moreover, the terms "include", "comprise" or its
Any other variant is intended to non-exclusive inclusion so that include the process, methods of a series of elements, article or
Equipment not only includes those elements, but also including other elements that are not explicitly listed, or further include for this process,
Method, article or the intrinsic element of equipment.In the absence of more restrictions, being wanted by what sentence " including one " limited
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.
Embodiment
The valve base of safety valve for transportable pressure vessel of the present embodiment is as shown in Figs. 1-2.The valve base of safety valve includes
Pedestal 23 and cylindrical cavity 24 through pedestal 23, wherein setting in the upper surface of pedestal 23, there are two location hole 22, location holes
22 quantity can be to be multiple, such as 2-5, Fig. 7, which is shown, sets the case where there are three location hole 22.Multiple location holes 22 can be distributed
On the same circumference centered on the axle center of cylindrical cavity 24.The aperture of location hole is 3-10mm；Preferably, 4-8mm；More
Goodly, 5mm.Cavity 24 includes seat threaded area 25 and seat guide portion 26 from top to bottom, and seat threaded area 25 is close to opening setting.Seat
The screw thread of threaded area 25 is straight thread, and the height of seat guide portion is the 1/3-2/3 of straight thread outer diameter.
As shown in Figure 3-4 with the safety valve of valve base of safety valve cooperation assembling, valve base of safety valve 18 and its safety valve 19 are logical
Straight thread is crossed to be fixedly connected.The safety valve 19 includes end cap 1, threaded area 2, guide portion 3 and valve function body 6 from top to bottom.Its
In, end cap 1, threaded area 2, guide portion 3 and valve function body 6 are integrated or integrally formed.
The height of end cap 1 is 0.5-2.0cm, and the diameter of end cap 1 is greater than the aperture with the matched valve base of safety valve of safety valve,
So that end cap 1 is exposed to outside valve base of safety valve after safety valve and valve base of safety valve assembly.The outer peripheral edge of end cap 1 be equipped with 5 °-
The groove of 30 ° of the uniform annular spread in angle interval, groove are circular groove, and groove is used for and the positioning on valve base of safety valve
Hole cooperation can be complete within the scope of 2.5 ° of -15 ° of distribution angles by cooperating multiple location holes of declinate distribution on valve base of safety valve
At locking matching, and then prevent from loosening during vehicle driving is vibrated.End cap 1 is equipped with mounting hole 17, and mounting hole 17 is installation
The matching hole of tool and safety valve, for dismounting safety valve, mounting hole 17 is interior octagonal structure, not only saves space, but also can be with
It prevents from arbitrarily dismantling.
The outer surface of threaded area 2 is equipped with straight thread.Screw thread does not have sealing function, is only used for locking, so that safety valve can
To disassemble and install repeatedly.Screw thread is sunk type installation, so that safety valve is flushed with top of the tank, overall safety valve is respectively positioned on slot
In tank, when tank car crosses tunnel or culvert etc., safety valve will not be collided, to considerably increase the safety in valve use
Property.
Guide portion 3 is guide cylinder, and the height of guide portion 3 is the 1/3-2/3 of 2 straight thread outer diameter of threaded area.It is being oriented to
The periphery in area 3 is equipped with annular groove, and annular groove is for accommodating O-ring 4 and O-ring retaining ring 5, and wherein O-ring retaining ring 5 is set to O-ring 4
Top.And O-ring retaining ring 5 is for preventing O-ring 4 to be squeezed and deformed, overflowing and even cut.The quantity of annular groove is one in the present embodiment
It is a, and according to required configuration, the quantity of annular groove may be multiple, such as two or three, and each annular groove is equipped with therewith
The O-ring 4 and O-ring retaining ring 5 to match, and then formation is multi-layer sealed, so that sealing effect is more preferable.4 radial seal of O-ring is
First of sealing of safety valve, by 4 radial seal of O-ring, so that bearing caused by the pressure of LPG or other dielectric gas
Pressure very little is lower to the intensity requirement of valve body and groove tank interface.Safety valve is equipped with the second road sealing device at end cap 1, the
Two road sealing devices are the gasket seal 16 of stuffing-box or fire-proof and dust-proof.The flange of end cap 1 is arranged in second road sealing device
Between valve base of safety valve.The distance between 2 lower end of O-ring 4 and threaded area is the 1/3-2/3 of 3 height of guide portion；Preferably,
It is the 1/3-1/2 of 3 height of guide portion.
O-ring seal and its retaining ring are located at the lower section of screw thread, and the guiding matched with the groove tank interface that O-ring 4 seals
Cylindrical body can design longer, and such design is so that safety valve is in use, and screw thread does not contact gas medium or other are miscellaneous
Matter avoids surface corrosion or screw thread stress corrosion, and can guarantee when screw thread has slight loosening, O-ring 4 it is slight on move down
It is dynamic, radial seal effect is not influenced, still can guarantee to seal No leakage.The installation in addition, O-ring seal is sunk, can prevent
Tank body damages sealing ring in the case of fire, because temperature is excessively high.
Valve function body 6 is used for over-voltage dielectric gas in pressure vessel is released out pressure vessel, including valve rod 7, main valve
Seat 8, locking nut 9, outlet passageway 10, spring 11, lock nut 12 and primary seal pad 15.Central axis of the valve rod 7 along safety valve
Line setting.Main valve seat 8 is fixedly connected with the lower part of guide portion 3, for fixed support valve rod 7.Locking nut 9 is used for valve rod 7
It is fixed on main valve seat 8.Outlet passageway 10 is fixedly connected with the lower end of main valve seat 8, for acquiring the overpressure gases in pressure vessel
Medium simultaneously gives off pressure vessel in time, prevents over-voltage.Spring 11 is surrounded on the periphery of valve rod 7, one end of spring 11 and outlet
The lower end in channel 10 leans.Spring 11 has high-fineness ratio (at least more than 5), so that both having reduced the whole body of safety valve
Product, and the stress fracture risk of spring is reduced, and under identical operating condition, the Lift of valve base of safety valve is bigger, possesses more
Big emission flow.Lock nut 12 is used for the other end of holddown spring 11.Primary seal pad 15 is arranged in locking nut 9 and main valve
Between seat 8, close to outlet passageway 10, contacts and compress with main valve seat 8 under the action of spring 11, for providing in safety valve
Sealing, when pressure medium is less than safety valve setting pressure in pressure vessel, primary seal pad 15 contacts sealing with main valve seat 8；When
In pressure vessel pressure medium be greater than safety valve setting pressure when, primary seal pad 15 is separated with main valve seat 8, overpressure gases medium by
Container is discharged through the gap of main valve seat 8 and primary seal pad 15 in outlet passageway 10.Elongated valve function body 6 is additionally provided with guide sleeve
13, valve rod 7 is maintained in guide sleeve 13 by guide sleeve 13, effectively to control beat, the bias of valve rod 7 and valve function body 6.
It is equipped with guide sleeve 14 inside spring 11, prevents spring beat due to vibration.The hold-doun nut for connecting 7 both ends of valve rod, using locking place
Reason, enhances the reliability of valve.
Fig. 6 shows safety valve 19 and sets the top view after assembling there are two the valve base of safety valve 18 of location hole 22.End cap
Outer rim be equipped with equally distributed groove, the quantity of groove is N, and the distribution angle between two adjacent grooves centers is α, then α=
360°/N.It is assumed that No. 1 location hole is in 0 ° of position, then No. 2 location holes and nearest cross centre line angulation θ=α/2.Cause
This, when end cap peripheral groove and valve base of safety valve 18 cooperate, two location holes 22 can be completed anti-within the scope of 1/2 distribution angle
Loose fit.θ can be 5-15 °；Preferably, 7-13 °；More preferably, 8-12 °.
Fig. 8 shows safety valve 19 and sets the top view after assembling there are three the valve base of safety valve 18 of location hole 22.End cap
Outer rim be equipped with equally distributed groove, the quantity of groove is N, and the distribution angle between two adjacent grooves centers is α, then α=
360°/N.It is assumed that No. 1 location hole is in 0 ° of position, then No. 2 location holes and nearest cross centre line angulation θ1=α/2, No. 3
Location hole and nearest cross middle line angulation are θ2=θ1α/4/2=.Therefore, in end cap peripheral groove and valve base of safety valve
When 18 cooperation, three location holes 22 can complete anti-loose fit within the scope of 1/4 distribution angle.
After end cap is rotated in place, groove is passed through by check bolt 21 and location hole 22 positions end cap, it is preferable that
Gasket 20 is added between check bolt 21 and end cap.It should be noted that check bolt is a kind of card format, can also lead to
The plug-in units such as pin, nail are crossed to be fixed.
According to above content, the valve base of safety valve cooperated with safety valve of the invention is four also settable, five
A or more location hole, to carry out loosening cooperation.It should be noted that multiple location holes should be set with scattering as far as possible
It sets, to reduce the influence to the stiffness and strength of valve base of safety valve.
All references mentioned in the present invention is incorporated herein by reference, independent just as each document
It is incorporated as with reference to such.In addition, it should also be understood that, after reading the above teachings of the present invention, those skilled in the art can
To make various changes or modifications to the present invention, such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
Claims (10)
1. a kind of valve base of safety valve for transportable pressure vessel, which is characterized in that the valve base of safety valve includes
Pedestal opens up multiple location holes in the upper surface of the pedestal, and the location hole is used to cooperate with the end cap of safety valve,
Described in safety valve and the valve base of safety valve match；And
Cylindrical cavity, the cavity run through the pedestal, and the location hole is arranged around the cavity, and the cavity includes
Seat threaded area, the seat threaded area are located at the top of the cavity, and close to opening, the screw thread of the seat threaded area is straight
Screw thread, the valve base of safety valve and its safety valve are fixedly connected by the straight thread；And
Seat guide portion, the seat guide portion are fixedly connected with seat threaded area lower part, and the height of the seat guide portion is described
The 1/3-2/3 of straight thread outer diameter.
2. valve base of safety valve as described in claim 1, which is characterized in that it is equipped with the second road sealing device in the opening,
Second road sealing device is the gasket seal of stuffing-box or fire-proof and dust-proof.
3. valve base of safety valve as described in claim 1, which is characterized in that the quantity of the location hole is two, and two institutes
Stating the angle theta between location hole is 5-15 °.
4. a kind of valve base of safety valve component for transportable pressure vessel, which is characterized in that
The component includes safety valve and valve base of safety valve a method according to any one of claims 1-3；
The safety valve includes
End cap, the end cap are located at the upper end of the safety valve, and the end cap is equipped with mounting hole；
Threaded area, the threaded area are fixedly connected with the end cap lower part, and the outer surface of the threaded area is equipped with straight thread, described
Safety valve is fixedly connected with its valve base of safety valve by the straight thread；
Guide portion, the guide portion are fixedly connected with the threaded area lower part, and the height of the guide portion is threaded area straight thread
The 1/3-2/3 of outer diameter is equipped with annular groove in the periphery of the guide portion, and the annular groove is for accommodating O-ring；And
Valve function body, the valve function body are fixedly connected with the guide portion lower part, are used for mistake in the pressure vessel
Pressure dielectric gas is released out the pressure vessel.
5. valve base of safety valve component as claimed in claim 4, which is characterized in that the safety valve is radial by the O-ring
Sealing, the safety valve includes O-ring retaining ring, and the O-ring retaining ring is for preventing the O-ring to be squeezed and deformed, overflow even
It cuts.
6. valve base of safety valve component as claimed in claim 4, which is characterized in that the O-ring and the threaded area lower end it
Between distance be the guide portion height 1/3-1/2.
7. valve base of safety valve component as claimed in claim 4, which is characterized in that the outer peripheral edge of the end cap is equipped with annular uniformly
The groove of distribution, the groove are used to cooperate with the location hole on the valve base of safety valve.
8. valve base of safety valve component as claimed in claim 7, which is characterized in that the groove is equal with 5 ° -30 ° of angle interval
Even distribution.
9. valve base of safety valve component as claimed in claim 7, which is characterized in that plug-in unit passes through the groove and is inserted into the positioning
Kong Zhong, the plug-in unit are screw, pin or bolt.
10. valve base of safety valve component as claimed in claim 4, which is characterized in that the valve function body includes
Valve rod, the valve rod are arranged along the central axis of the safety valve；
Main valve seat, the main valve seat are fixedly connected with the lower part of the guide portion, support the valve rod for fixed；
Locking nut, the locking nut are used to the valve rod being fixed on the main valve seat；
Outlet passageway, the outlet passageway are fixedly connected with the lower end of the main valve seat, for acquiring the over-voltage in pressure vessel
Gas medium simultaneously gives off pressure vessel in time；
Spring, the spring are surrounded on the periphery of the valve rod, and one end of the spring and the lower end of the outlet passageway offset
It leans on；And
Lock nut, the lock nut are used to compress the other end of the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125057.9A CN108930804A (en) | 2018-09-26 | 2018-09-26 | Valve base of safety valve and its component for transportable pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125057.9A CN108930804A (en) | 2018-09-26 | 2018-09-26 | Valve base of safety valve and its component for transportable pressure vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108930804A true CN108930804A (en) | 2018-12-04 |
Family
ID=64444077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811125057.9A Pending CN108930804A (en) | 2018-09-26 | 2018-09-26 | Valve base of safety valve and its component for transportable pressure vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108930804A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2453572A1 (en) * | 1974-11-12 | 1976-05-13 | Teves Gmbh Alfred | Hydraulic control system for double-acting working cylinders - contains blocking valves actuated by piston position |
| CN1643281A (en) * | 2002-04-05 | 2005-07-20 | 费希尔控制国际公司 | Pressure relief valve with improved repairability |
| CN201190825Y (en) * | 2008-03-14 | 2009-02-04 | 广东胜捷消防科技有限公司 | Pin valve seal structure for pressure display device of gas fire-extinguishing system |
| CN103075549A (en) * | 2012-12-29 | 2013-05-01 | 平湖市瑞阳精密机械有限公司 | Overflow valve |
| CN105605258A (en) * | 2016-01-25 | 2016-05-25 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve |
| CN206268522U (en) * | 2016-10-26 | 2017-06-20 | 华东矿用设备有限公司 | Hydraulic system safety valve in a kind of hydraulic support |
| CN208845749U (en) * | 2018-09-26 | 2019-05-10 | 荆门宏图特种飞行器制造有限公司 | Valve base of safety valve and its component for transportable pressure vessel |
-
2018
- 2018-09-26 CN CN201811125057.9A patent/CN108930804A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2453572A1 (en) * | 1974-11-12 | 1976-05-13 | Teves Gmbh Alfred | Hydraulic control system for double-acting working cylinders - contains blocking valves actuated by piston position |
| CN1643281A (en) * | 2002-04-05 | 2005-07-20 | 费希尔控制国际公司 | Pressure relief valve with improved repairability |
| CN201190825Y (en) * | 2008-03-14 | 2009-02-04 | 广东胜捷消防科技有限公司 | Pin valve seal structure for pressure display device of gas fire-extinguishing system |
| CN103075549A (en) * | 2012-12-29 | 2013-05-01 | 平湖市瑞阳精密机械有限公司 | Overflow valve |
| CN105605258A (en) * | 2016-01-25 | 2016-05-25 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve |
| CN206268522U (en) * | 2016-10-26 | 2017-06-20 | 华东矿用设备有限公司 | Hydraulic system safety valve in a kind of hydraulic support |
| CN208845749U (en) * | 2018-09-26 | 2019-05-10 | 荆门宏图特种飞行器制造有限公司 | Valve base of safety valve and its component for transportable pressure vessel |
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