CN105465437A - Valve element assembly of safety valve - Google Patents
Valve element assembly of safety valve Download PDFInfo
- Publication number
- CN105465437A CN105465437A CN201610051863.0A CN201610051863A CN105465437A CN 105465437 A CN105465437 A CN 105465437A CN 201610051863 A CN201610051863 A CN 201610051863A CN 105465437 A CN105465437 A CN 105465437A
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- valve
- safety valve
- core assembly
- pad
- swivel nut
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- 239000007788 liquid Substances 0.000 claims abstract description 46
- 239000012530 fluid Substances 0.000 claims description 21
- 230000004308 accommodation Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 28
- 230000000694 effects Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- F16K17/06—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 special arrangements for adjusting the opening pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- 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
- F16K1/36—Valve members
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- 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
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- 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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a valve element assembly of a safety valve. The valve element assembly comprises a sliding seat, a thread sleeve arranged in the sliding seat, and a valve pad which is arranged in the thread sleeve and used for being matched with a liquid inlet connector of the safety valve, and the valve pad is provided with a conical groove. The valve element assembly is applied to the safety valve and can be used for controlling connection and disconnection of an oil path from a liquid inlet hole to a liquid discharge hole; after the valve element assembly is far away from the liquid inlet connector, large-flow overflow can be achieved, the flow of the safety valve is greatly increased, and the axial displacement of the valve element assembly can be reduced through short-time rapid overflow; by means of reduction of the axial displacement of the valve element assembly, the axial deformation of a reset spring can be reduced, and finally pressure fluctuation can be reduced.
Description
Technical field
The invention belongs to and relate to coal mine fully-mechanized mining hydraulic support, specifically, the present invention relates to a kind of mangetic core assembly of safety valve.
Background technique
Along with large-scale enforcement and the development of coal mine fully-mechanized mining hydraulic support; the requirement of working face to hydraulic support is also more and more stricter; so just there is further requirement to the safety valve of protective cradle hydraulic jack; especially to working life of safety valve and reliability having had further requirement; when the pressure from hydraulic support top causes by power; can safety valve when bearing high pressure, and short time fully stable in time off-load directly affects working life and the supporting safety of support.It not only can damage Sealing, pipeline and hydraulic element, but also can cause vibrations and noise; Sometimes some pressure controlled hydraulic element is made to produce error.
The safety valve of current use, mainly comprises valve casing, liquid inlet joint, spool, valve pocket, Returnning spring, spring seat and voltage regulation screw.In valve casing contained spring chamber, it is that on the voltage regulation screw that is threaded, the other end is against on moveable spring seat that Returnning spring one end is against with valve casing.Valve body inserts the valve casing the other end and with valve casing for being threaded, valve inner is provided with the cavity for holding valve pocket, and spool is positioned at valve pocket, and the end of spool contacts with spring seat, moves for promoting spring seat the unlatching realizing safety valve.
The overflow ducts of existing safety valve adopts around the liquid pass hole be arranged on spool sidewall, liquid pass hole aperture is little, cause that draining flow is little, flow loss is large, and match with spring seat due to spool, spring seat bears the axial force that Returnning spring applies, cause spool force-bearing situation bad, in working procedure, pressure surge is larger, and then cause the closing pressure of safety valve general all undesirable, the hydraulic element be connected with safety valve finally can be caused to cause waste as the fluid of high-voltage oil cylinder too much runs off.Sealing effect between spool and valve pocket is undesirable, and it is wayward for the groove processing precision of installing Sealing that spool face is arranged.In addition, the spring chamber of valve casing inside is in open state, dust-proof, waterproof and rust-proof effect poor, reduce the working life of safety valve.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, the invention provides a kind of mangetic core assembly of safety valve, object reduces pressure surge.
To achieve these goals, the technological scheme that the present invention takes is: the mangetic core assembly of safety valve, comprise sliding seat, be arranged at the swivel nut in sliding seat and be arranged in swivel nut and valve pad for matching with the liquid inlet joint of safety valve, valve pad has cone-shaped groove.
Described liquid inlet joint comprises the joint body that is connected with the valve body of safety valve and is fixedly connected with joint body and the sealed department matched with described nut and valve pad, and liquid inlet joint has inlet opening, and valve body has outage.
Described valve pad is fixedly clamped by described sliding seat and described swivel nut.
Described swivel nut has the first holding cavity for holding described sealed department with the described valve pad of accommodation and the second holding cavity is communicated with the first holding cavity, and described sliding seat has the 3rd holding cavity of accommodation swivel nut.
The end face of described sliding seat is provided with the first oil duct for fluid being guided to outage, the end face of described swivel nut is provided with the second oil duct for fluid being guided to the first oil duct, when described valve pad and described hermetic unit from after, the fluid in described inlet opening flow to described outage place through the second oil duct, the first oil duct successively.
Described first oil duct, the second oil duct and described outage are positioned on the same radial line of described valve body.
Described sealed department is in first holding cavity that can embed described swivel nut and the ledge structure contacted with described valve pad, and the diameter of described second holding cavity is greater than the diameter of the first holding cavity.
Described sealed department has and sets gradually and the first shaft part of increasing gradually of outer diameter and the second shaft part, second shaft part is fixedly connected with described joint body, first shaft part matches with described valve pad, and the outer diameter of the first shaft part is not more than the diameter of described first holding cavity.
Mangetic core assembly of the present invention, be applied to safety valve, can be used for controlling the break-make of inlet opening to the oil circuit of outage, large discharge overflow can be realized after mangetic core assembly is away from liquid inlet joint, safety valve flow improves greatly, the quick overflow of short time can reduce the axial displacement of mangetic core assembly, and mangetic core assembly axial displacement is reduced and the axial deformation of Returnning spring can be made to reduce, and finally can reduce pressure surge.
Accompanying drawing explanation
This specification comprises the following drawings, shown content respectively:
Fig. 1 is the sectional view of the safety valve with mangetic core assembly of the present invention;
Fig. 2 is the sectional view of mangetic core assembly of the present invention;
Fig. 3 is the sectional view of liquid inlet joint;
Fig. 4 is the sectional view of sliding seat;
Fig. 5 is the side view of sliding seat;
Fig. 6 is the sectional view of swivel nut;
Fig. 7 is the side view of swivel nut;
Fig. 8 is the sectional view of valve body;
Fig. 9 is the sectional view of valve pad;
Figure 10 is the sectional view of spring seat;
Figure 11 is that the valve pad of the first structure coordinates schematic diagram with sealed department;
Figure 12 is that when being in opening state, the first structure valve pad coordinates schematic diagram with sealed department;
Figure 13 is the sectional view of the valve pad of the second structure;
Figure 14 is the stressed schematic diagram of the second structure valve pad when being in closed condition;
Figure 15 is that when being in opening state, the second structure valve pad coordinates schematic diagram with sealed department;
Figure 16 is the sectional view of the valve pad of the third structure;
Figure 17 is the stressed schematic diagram of the third structure valve pad when being in closed condition;
Figure 18 is that when being in opening state, the third structure valve pad coordinates schematic diagram with sealed department;
Be labeled as in figure:
1, voltage regulation screw; 2, Returnning spring;
3, valve body; 31, outage; 32, unloading cavity;
4, spring seat; 41, the first boss; 42, guide section; 43, the first positioning hole;
5, swivel nut; 51, large chamber, footpath; 52, path chamber; 53, the second holding cavity; 54, the second oil duct; 6, sliding seat; 61, the second positioning hole; 62, the 3rd holding cavity; 63, the first oil duct;
7, valve pad; 71, inner bottom surface; 72, toroidal surface; 73, sunk structure; 74, male cone (strobilus masculinus); 75, bottom plane; 8, liquid inlet joint; 81, joint body; 82, the first shaft part; 83, the second shaft part; 84, inlet opening; 9, valve casing; 10, spheroid; 11, the first seal ring; 12, the second seal ring.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, be described in further detail the specific embodiment of the present invention, object helps those skilled in the art to have more complete, accurate and deep understanding to design of the present invention, technological scheme, and contribute to its enforcement.
As shown in Figures 1 to 10, for adopting a kind of safety valve of mangetic core assembly of the present invention, this safety valve comprises the valve body 3 with outage 31, the liquid inlet joint 8 with inlet opening 84, the valve casing 9 be connected with valve body 3 and the resetting-mechanism being arranged at valve casing 9 inside, and inlet opening 84 to be communicated with outage 31 by the unloading cavity 32 of valve body 3 inside and three forms the overflow ducts of safety valve.In order to solve problem existing in prior art, this safety valve also comprises mangetic core assembly of the present invention, mangetic core assembly of the present invention is for be movably arranged in valve body 3 and for controlling water kick passage break-make, mangetic core assembly is between liquid inlet joint 8 and resetting-mechanism, mangetic core assembly and opening and closing for controlling inlet opening 84, namely mangetic core assembly realizes the control of overflow ducts break-make by the mobile opening and closing controlling inlet opening 84.
The safety valve of prior art to be generally connected on coal mine fully-mechanized mining hydraulic support and the hydraulic element that pressure medium is housed as on oil hydraulic cylinder, when in the work set pressure that oil hydraulic cylinder internal liquid is in safety valve, overflow relief valve, under initial tension of spring effect, is in closed condition; When oil hydraulic cylinder is subject to External Force Acting internal pressure higher than minimum setting pressure of relief valve, hydraulic medium pressure exceedes initial tension of spring and opens spool overflow, and the moment of unlatching is called as the work cracking pressure of safety valve; Make medium flow out release pressure to oil hydraulic cylinder internal pressure and spring pre-tightening equilibrium of forces by the overflow of a period of time of safety valve, now safety valve cuts out, and the steady pressure that safety valve keeps after stopping overflow being called as closing pressure,
Specifically, as illustrated in figures 1 and 8, liquid inlet joint 8, valve body 3 and valve casing 9 are the cylindrical member of both ends open, inner hollow, in the end that liquid inlet joint 8 inserts valve body 3 and with valve body 3 for being threaded, in the end that the other end of valve body 3 inserts valve casing 9 and with valve casing 9 for being threaded.Valve casing 9 inside has the spring chamber holding resetting-mechanism, resetting-mechanism is the axial force of closing for applying to make it to move to realize inlet opening 84 towards liquid inlet joint 8 place to mangetic core assembly, resetting-mechanism comprises spring seat 4, Returnning spring 2 and voltage regulation screw 1, voltage regulation screw 1 is in the other end screw-in spring chamber of valve casing 9 and is threaded with valve casing 9, Returnning spring 2 is clipped between voltage regulation screw 1 and spring seat 4, spring seat 4 can moving axially along valve casing 9 by the promotion of Returnning spring 2 and mangetic core assembly in valve casing 9, mangetic core assembly promotion spring seat 4 moves towards voltage regulation screw 1 place and safety valve can be made to open, Returnning spring 2 promotes spring seat 4 and mangetic core assembly and moves safety valve can be made to close.
As shown in figures 1 and 3, liquid inlet joint 8 is as oil hydraulic cylinder socket connection for the hydraulic element with coal mine fully-mechanized mining hydraulic support, as shown in figures 1 and 3, liquid inlet joint 8 to comprise with valve body 3 for the joint body 81 that is threaded and is the sealed department being coaxially fixedly connected with and matching with mangetic core assembly with joint body 81, the outer surface of joint body 81 is provided with outside thread, and the corresponding terminal interior surface at valve body 3 is provided with internal thread.Inlet opening 84 is from the end face center of joint body 81 and the penetration hole be through to vertically on the end face of sealed department, and sealed department is that to be positioned at valve body 3 inner and for matching with mangetic core assembly, with the break-make of controlling water kick passage.
As illustrated in figures 1 and 8, valve body 3 inside be positioned at part cavity inside joint body 81 as the unloading cavity 32 allowing fluid pass through, outage 31 is communicated with unloading cavity 32, because the relative liquid inlet joint 8 of mangetic core assembly is moveable, then and the adjustable volume of unloading cavity 32.Sealed department is by realizing the closedown of inlet opening 84 with contacting of mangetic core assembly, and now unloading cavity 32 volume is minimum, and inlet opening 84 is not communicated with outage 31, and then overflow ducts is disconnected, and safety valve realizes cutting out.When mangetic core assembly is vertically towards when moving away from liquid inlet joint 8 direction, the volume of unloading cavity 32 increases gradually, and inlet opening 84 is communicated with outage 31 by unloading cavity 32, overflow ducts conducting, and safety valve realizes opening.Therefore, safety valve moving axially by mangetic core assembly, realize the control of overflow ducts break-make, and be communicated with inlet opening 84 and outage 31 by unloading cavity 32, unloading cavity 32 volume is large, large discharge overflow can be realized when overflow ducts conducting, it is little that fluid in inlet opening 84 flow to drag losses in outage 31 process, thus quick relief in the short time can be realized, corresponding, the quick overflow of short time can reduce the axial displacement of mangetic core assembly, and mangetic core assembly moves very little distance vertically in valve body 3 can complete breakdown action.And the axial displacement of mangetic core assembly is reduced, when the safety valve of the safety valve with prior art with mangetic core assembly of the present invention adopts the Returnning spring 2 with identical elasticity coefficient, the stroke with the Returnning spring 2 in the safety valve of mangetic core assembly of the present invention is short, the axial deformation of Returnning spring 2 is little, finally makes the pressure surge of overflow relief valve little.
As illustrated in figures 1 and 8, outage 31 is arranged on the sidewall of valve body 3, outage 31 and through hole for radially running through setting.Outage 31 is also circumferentially uniform multiple on the sidewall of valve body 3, and all outages 31 are distributed in around the sealed department of unloading cavity 32 and liquid inlet joint 8, like this when safety valve is opened, the fluid in inlet opening 84 can from passing through between sealed department and mangetic core assembly and flowing to outage 31.This unloading way liquid flow area is large, and flow is larger more direct, and drag losses is little.
As depicted in figs. 1 and 2, mangetic core assembly comprises the sliding seat 6 be movably arranged in valve body 3 inner chamber, be arranged at the swivel nut 5 in sliding seat 6 and be arranged in swivel nut 5 and the valve pad 7 realizing sealing that matches with sealed department, valve pad 7 and being fixedly clamped by sliding seat 6 and swivel nut 5.
As shown in Figure 2 and Figure 6, swivel nut 5 is the cylindrical structural of both ends open and inner hollow, the cavity at swivel nut 5 inside center place is that the first holding cavity for holding sealed department is with accommodation valve pad 7 and the second holding cavity 53 be communicated with the first holding cavity, first holding cavity and the second holding cavity 53 are for axially setting gradually along swivel nut 5, and diameter is for increase gradually.One end of valve pad 7 is towards sealed department, and this end end face of valve pad 7 is the circular flat with the axis perpendicular of liquid inlet joint 8, as shown in Figure 9, valve pad 7 is by carrying out with sealed department the control that plane contact realizes closing inlet opening 84, adopt plane sealing form, good sealing effect.
As shown in Figure 2 and Figure 6, the first holding cavity and both the second holding cavities 53 are coaxial and be communicated with, and the first holding cavity forms the opening allowing the sealed department of liquid inlet joint 8 insert on the end face of swivel nut 5.Valve pad 7 is the circular block shape structure adopting polyurethane to make, the diameter of valve pad 7 is not less than the diameter of the second holding cavity 53, diameter due to the first holding cavity is less than the diameter of the second holding cavity 53, a limited step is formed in first holding cavity and the second holding cavity 53, valve pad 7 is fill in the second holding cavity 53 when installing, valve pad 7 and with swivel nut 5 interference fit, clamp valve pad 7 finally by sliding seat 6, realize the axial restraint of valve pad 7.
As shown in Figure 2 and Figure 4, sliding seat 6 is and valve body 3 and the coaxial cylindrical structural of swivel nut 5, the periphery of sliding seat 6 contacts with the inner headed face of valve body 3, and sliding seat 6 is between spring seat 4 and liquid inlet joint 8, and sliding seat 6 can move axially along valve body 3 and can insert valve casing 9 inside.It is arrange and the circular cavity extended to form towards sliding seat 6 inside in the end face center facing liquid inlet joint 8 of sliding seat 6 that sliding seat 6 has the 3rd holding cavity the 62, three holding cavity 62 holding swivel nut 5.Installing valve pad 7 and being filled in after in the second holding cavity 53 of swivel nut 5, the swivel nut 5 with valve pad 7 is filled in the 3rd holding cavity 62 of sliding seat 6, the diapire of the 3rd holding cavity 62 until valve pad 7 is conflicted, clamping valve pad 7.
As shown in Figure 2, as preferably, swivel nut 5 to insert in the 3rd holding cavity 62 and with sliding seat 6 for being threaded, and is correspondingly provided with outside thread at swivel nut 5 outer surface, and the internal surface in the 3rd holding cavity 62 is provided with internal thread.Swivel nut 5 is arranged to be threaded with sliding seat 6, easy disassembly swivel nut 5, so that change valve pad 7.
As shown in Figure 4 and Figure 5, as preferably, the end face facing liquid inlet joint 8 of sliding seat 6 be provided with allow fluid by and fluid is guided to the first oil duct 63 of outage 31, this first oil duct 63 is the groove extended to along the radial direction of sliding seat 6 from the 3rd holding cavity 62 place on the periphery of sliding seat 6.As shown in Figure 6 and Figure 7, the end face facing liquid inlet joint 8 of swivel nut 5 be provided with allow fluid by and fluid is guided to the second oil duct 54 of the first oil duct 63, this second oil duct 54 is the groove extended to along the radial direction of swivel nut 5 from the first holding cavity place on the periphery of swivel nut 5, first oil duct 63 is communicated with the second oil duct 54, and diametrically, the first oil duct 63 is between outage 31 and the second oil duct 54.By arranging oil duct on the end face of swivel nut 5 and sliding seat 6, when valve pad 7 and hermetic unit from after, these oil ducts guide to outage 31 by from inlet opening 84 fluid flow in unloading cavity 32, are conducive to the quick overflow that safety valve realizes the short time.
As depicted in figs. 1 and 2, as preferably, the first oil duct 63, second oil duct 54 and aligned in position equal with the quantity of outage 31, the first oil duct 63 and the second oil duct 54 respectively on the end face of sliding seat 6 and swivel nut 5 for being uniformly distributed circumferentially.At valve body 3 axially, outage 31 is between spring seat 4 and joint body 81, each oil duct is positioned on the same radial line of valve body 3 with outage 31 aligned in position in outside respectively, when valve pad 7 and hermetic unit from after, the fluid in inlet opening 84 flow to outage 31 place through the second oil duct 54, first oil duct 63 successively.
As preferably, sealed department is in first holding cavity that can embed swivel nut 5 and the multi-stage stairs shape structure contacted with valve pad 7, and such sealed department can have multiple plane contact with mangetic core assembly, improves the reliability of sealing.
As shown in figures 1 and 3, in the present embodiment, sealed department is two-stage step-like structure, and sealed department has and to set gradually and both the first shaft part 82 of increasing gradually of outer diameter and the second shaft part 83, first shaft part 82 and the second shaft part 83 are coaxial.The end of the second shaft part 83 and joint body 81 is for be coaxially fixedly connected with, and the outer diameter of the second shaft part 83 is less than the outer diameter of joint body 81.First shaft part 82 is for embedding in the first holding cavity of swivel nut 5, and the first shaft part 82 matches with valve pad 7 and can carry out plane contact, and the outer diameter of the first shaft part 82 is not more than the diameter of a holding cavity.
As shown in figures 1 and 3, the length of the first shaft part 82 is not less than the degree of depth of the first holding cavity, with guarantee the first shaft part 82 end face can with the end contact of valve pad 7, realize sealing.Inlet opening 84 forms the opening allowing fluid flow out on the end face of the first shaft part 82, and this end face of the first shaft part 82 is also the end face of the insertion end of liquid inlet joint 8.The outer diameter of the first shaft part 82 is less than the end face diameter of valve pad 7, thus guarantees that the opening on the end face of the first shaft part 82 can seal by the end face of valve pad 7 completely.And, when sealed department contacts with mangetic core assembly, safety valve cuts out, now the end face of the first shaft part 82 contacts with valve pad 7, the end face of the second shaft part 83 and the end contact of swivel nut 5 and sliding seat 6, the end face of the first shaft part 82 and the second shaft part 83 is the plane paralleled with the end face of swivel nut 5, sliding seat 6 and valve pad 7, and namely sealed department has multiple plane to contact with mangetic core assembly to realize sealing, good sealing effect, reliability is high.In addition, owing to adopting face structure to cross liquid mode, valve pad 7 is by the end contact effect of liquid inlet joint 8, and the impact that valve pad 7 bears is little, long service life.
As preferably, as shown in Figure 6, the first holding cavity in swivel nut 5 is divided into columniform path chamber 52 and chamber, conical large footpath 51, chamber, large footpath 51 has bigger diameter end and miner diameter end, the diameter of the miner diameter end in chamber, large footpath 51 is equal with the diameter in path chamber 52, and the miner diameter end in large chamber, footpath 51 is connected with path chamber 52.Chamber, large footpath 51 is coaxial with path chamber 52, path chamber 52 between chamber, large footpath 51 and the second holding cavity 53, the diameter of the bigger diameter end in chamber, large footpath 51 is greater than the outer diameter of the first shaft part 82, and the second oil duct 54 to arrange from the place of chamber 51, large footpath and internal surface in chamber, large footpath 51 forms opening.It is uncovered that the swivel nut 5 of this structure has towards sealed department, be convenient to sealed department and embed, and conical internal surface has good water conservancy diversion effect to fluid.
As preferably, as shown in Figure 1, mangetic core assembly also comprises the second seal ring be sheathed on sliding seat 6, second seal ring is clipped between valve body 3 and sliding seat 6, second seal ring and between spring seat 4 and outage 31, for realizing the sealing between unloading cavity 32 and spring chamber, avoid fluid to flow in spring chamber from the gap between sliding seat 6 and valve body 3, thus can avoid corroding Returnning spring 2.
As shown in Figure 10, the spring seat 4 of resetting-mechanism is made up of guide section 42 and the first boss 41, guide section 42 is circular block shape structure, and be connected to form one in the center, side of guide section 42 and guide section 42 spring seat 4, first boss 41 of structure of the first boss 41 protrudes towards voltage regulation screw 1.First boss 41 is coaxial with guide section 42, and the first boss 41 is cylindrical, and the diameter of guide section 42 is greater than the diameter of the first boss 41.Returnning spring 2 is helical spring, and the first boss 41 positions one end of Returnning spring 2 for inserting in Returnning spring 2, and voltage regulation screw 1 has for inserting in Returnning spring 2 boss that the other end of Returnning spring 2 positions.
As shown in Fig. 1 and Figure 10, resetting-mechanism also comprises the spheroid 10 be clipped between spring seat 4 and sliding seat 6, spheroid 10 is complete ball, and the effect of spheroid 10 makes spring seat 4 and sliding seat 6 in moving process, have good adaptivity, spring seat 4 is had good in disposition.The end face center facing sliding seat 6 of spring seat 4 has allows spheroid 10 embed and for conical first positioning hole 43, the end face center facing spring seat 4 of sliding seat 6 has allows spheroid 10 embed and the locating face of fitting as the sphere with spheroid 10 for the conical inner surface in conical second positioning hole 61, the first positioning hole 43 and the second positioning hole 61.Spring seat 4 is owing to being clipped between Returnning spring 2 and mangetic core assembly, and spring seat 4 diametrically and leave gap (namely spring seat 4 radial direction lacking support) between valve casing 9 inwall, mangetic core assembly and Returnning spring 2 are all to the active force that spring seat 4 applies vertically, match with spheroid 10 by arranging conical positioning hole in spring seat 4 and sliding seat 6, form sphere-contact, spring seat 4 uniform force can be guaranteed, make spring seat 4 by axial force, not by diametral interference, prevent from causing the stuck or bending deflection of Returnning spring 2 by radial force, improve reliability.
As is illustrated by figs. 11 and 12, two ends end face is to the valve pad 7 of plane, one end of valve pad 7 is towards sealed department, and this end end face of valve pad 7 is the plane with the axis perpendicular of liquid inlet joint 8, when overflow opened by safety valve, produce shear flow when liquid flows out during overflow, the center position of valve pad 7 can form negative pressure of vacuum pulling force, valve pad 7 can be caused to pull out lost efficacy, affect the reliability of safety valve.
Therefore, as variant embodiment, as shown in FIG. 13 to 15, valve pad 7 is the circular block shape structure adopting polyurethane to make, one end of valve pad 7 is towards sealed department, and this end end face of valve pad 7 is made up of an inner bottom surface 71 and a sealing surface 72, this end end face of valve pad 7 is formed towards the sunk structure 73 of valve pad 7 internal recess.Sealing surface 72 is for having the annular plane of center hole, and sealing surface 72 for contacting with the internal face of the second holding cavity 53, and keeps in touch for the end face of the first shaft part 82 with liquid inlet joint, is closed by inlet opening.Inner bottom surface 71 is arranged in the center hole of sealing surface 72, and both are coaxial, and the inner edge of the outer rim of inner bottom surface and sealing surface 72 is connected to form complete end face.As preferably, inner bottom surface 71 is sphere, forms an inwardly recessed ball recess, namely form sunk structure 73 in the center, end of valve pad 7.Sealing surface 72 realizes sealing for matching with liquid inlet joint, the outer diameter of sealing surface 72 is not less than the diameter of the second holding cavity 53, the outer diameter of sealing surface 72 is greater than the outer diameter of the first shaft part 82, the inner diameter of sealing surface 72 is not more than the outer diameter of the first shaft part 82, guarantee that sealing surface 72 can keep in touch with the end face of the first shaft part 82 like this when safety valve cuts out, inlet opening is closed.
For the valve pad 7 with sunk structure, as shown in figure 14, because valve pad 7 has inner concave arc surface effect, highly pressurised liquid from liquid inlet joint can be divided into axial thrust load Fn and radial component Fr on curved surface, component Fr is with under the acting in conjunction of the directed force F a produced by supporting element at cylindrical and the back side and Fb, butt joint sealing position produces extruding force, and increase with fluid pressure and increase, and plane valve pad just can not produce such effect, therefore to compare the valve pad (Fig. 9 shown in) not having sunk structure, higher pressure can be born.As shown in figure 15, when also large discharge overflow opened by safety valve, valve pad is because of the reflecting action of inner concave arc surface, the highly pressurised liquid of flowing produces unordered disorder flowing in the center region of valve pad, the pressured fluid of this unordered disorder flowing forms lasting pressure effect to valve pad surface of contact, on the supporting surface being pressed in behind making valve pad stable; If when valve pad surface is plane, during overflow, liquid can directly radially flow out, and forming negative pressure of vacuum region in valve pad central position, the liquid of this negative pressure region can produce pulling force effect to valve pad and cause valve pad to leave supporting surface behind until be drawn out damage and cause seal failure.
Sunk structure 73 is except for except spherical, can also be other shapes, as shown in figure 16, as the variant embodiment to valve pad shown in Figure 13, the shape that the structure of the valve pad 7 of this structure is in sunk structure 73 relative to the structure difference of valve pad shown in Figure 13 is different, and remaining part is all identical.The sunk structure 73 of the valve pad 7 of this structure is cone-shaped groove, inner bottom surface is made up of male cone (strobilus masculinus) 74 and bottom plane 75, and male cone (strobilus masculinus) 74 is conical surface, and male cone (strobilus masculinus) 74 is arranged in the center hole of sealing surface 72, both are coaxial, and the outer rim of male cone (strobilus masculinus) 74 is connected with the inner edge of sealing surface 72.Male cone (strobilus masculinus) 74 has bigger diameter end and miner diameter end, and the bigger diameter end of male cone (strobilus masculinus) 74 is connected with the inward flange of sealing surface 72, and miner diameter end is connected with the outward edge of bottom plane 75.Bottom plane 75 is the disk coaxial with sealing surface 72, and bottom plane 75 is arranged in the center hole of male cone (strobilus masculinus) 74, and both are coaxial, and the outer rim of male cone (strobilus masculinus) 74 is connected with the bigger diameter end outer rim of inner conical surface 73, and form complete end face with sealing surface 72.The valve pad of structure shown in Figure 16 has identical effect with the valve pad of structure shown in Figure 13, as shown in Figure 17 and Figure 18, does not repeat them here.
Below by reference to the accompanying drawings to invention has been exemplary description.Obviously, specific implementation of the present invention is not subject to the restrictions described above.As long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technological scheme is carried out; Or without improvement, above-mentioned design of the present invention and technological scheme directly applied to other occasion, all within protection scope of the present invention.
Claims (8)
1. the mangetic core assembly of safety valve, is characterized in that: comprise sliding seat, be arranged at the swivel nut in sliding seat and be arranged in swivel nut and valve pad for matching with the liquid inlet joint of safety valve, valve pad has cone-shaped groove.
2. the mangetic core assembly of safety valve according to claim 1, it is characterized in that: described liquid inlet joint comprises the joint body that is connected with the valve body of safety valve and is fixedly connected with joint body and the sealed department matched with described nut and valve pad, liquid inlet joint has inlet opening, and valve body has outage.
3. the mangetic core assembly of safety valve according to claim 1, is characterized in that: described valve pad is fixedly clamped by described sliding seat and described swivel nut.
4. the mangetic core assembly of safety valve according to claim 2, it is characterized in that: described swivel nut has the first holding cavity for holding described sealed department with the described valve pad of accommodation and the second holding cavity is communicated with the first holding cavity, and described sliding seat has the 3rd holding cavity of accommodation swivel nut.
5. the mangetic core assembly of safety valve according to claim 2, it is characterized in that: the end face of described sliding seat is provided with the first oil duct for fluid being guided to outage, the end face of described swivel nut is provided with the second oil duct for fluid being guided to the first oil duct, when described valve pad and described hermetic unit from after, the fluid in described inlet opening flow to described outage place through the second oil duct, the first oil duct successively.
6. the mangetic core assembly of safety valve according to claim 5, is characterized in that: described first oil duct, the second oil duct and described outage are positioned on the same radial line of described valve body.
7. the mangetic core assembly of safety valve according to claim 5, is characterized in that: described sealed department is in first holding cavity that can embed described swivel nut and the ledge structure contacted with described valve pad, and the diameter of described second holding cavity is greater than the diameter of the first holding cavity.
8. the mangetic core assembly of safety valve according to claim 5, it is characterized in that: described sealed department has and sets gradually and the first shaft part of increasing gradually of outer diameter and the second shaft part, second shaft part is fixedly connected with described joint body, first shaft part matches with described valve pad, and the outer diameter of the first shaft part is not more than the diameter of described first holding cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610051863.0A CN105465437A (en) | 2016-01-25 | 2016-01-25 | Valve element assembly of safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610051863.0A CN105465437A (en) | 2016-01-25 | 2016-01-25 | Valve element assembly of safety valve |
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| CN105465437A true CN105465437A (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610051863.0A Pending CN105465437A (en) | 2016-01-25 | 2016-01-25 | Valve element assembly of safety valve |
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| CN (1) | CN105465437A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023024033A1 (en) * | 2021-08-26 | 2023-03-02 | Engineered Controls International, Llc | Pressure relief valves for liquid hydrogen tanks |
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|---|---|---|---|---|
| US5341838A (en) * | 1993-08-23 | 1994-08-30 | Powell Walter W | Direct spring pressure operated valve |
| CN2298390Y (en) * | 1997-04-24 | 1998-11-25 | 柳州第二空气压缩机总厂 | Safety valve |
| CN2592995Y (en) * | 2002-12-05 | 2003-12-17 | 周纪昌 | Pressure-regulating unload valve for air conditioner |
| CN201065766Y (en) * | 2007-08-15 | 2008-05-28 | 浙江慧丰机械有限公司 | Safe valve for full-mechanized hydraulic support |
| CN203905970U (en) * | 2014-02-10 | 2014-10-29 | 深圳市神拓机电设备有限公司 | High-flow column relief valve |
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2016
- 2016-01-25 CN CN201610051863.0A patent/CN105465437A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341838A (en) * | 1993-08-23 | 1994-08-30 | Powell Walter W | Direct spring pressure operated valve |
| CN2298390Y (en) * | 1997-04-24 | 1998-11-25 | 柳州第二空气压缩机总厂 | Safety valve |
| CN2592995Y (en) * | 2002-12-05 | 2003-12-17 | 周纪昌 | Pressure-regulating unload valve for air conditioner |
| CN201065766Y (en) * | 2007-08-15 | 2008-05-28 | 浙江慧丰机械有限公司 | Safe valve for full-mechanized hydraulic support |
| CN203905970U (en) * | 2014-02-10 | 2014-10-29 | 深圳市神拓机电设备有限公司 | High-flow column relief valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023024033A1 (en) * | 2021-08-26 | 2023-03-02 | Engineered Controls International, Llc | Pressure relief valves for liquid hydrogen tanks |
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