CN105318025A - Double-disc wedge gate valve adopting composite spring connection - Google Patents
Double-disc wedge gate valve adopting composite spring connection Download PDFInfo
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- CN105318025A CN105318025A CN201410370511.2A CN201410370511A CN105318025A CN 105318025 A CN105318025 A CN 105318025A CN 201410370511 A CN201410370511 A CN 201410370511A CN 105318025 A CN105318025 A CN 105318025A
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- flashboard
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- gate valve
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Abstract
A double-disc wedge gate valve adopting composite spring connection comprises a valve body, discs, a valve rod, a bearing gland, fasteners and other components, wherein the upper end of the valve rod is matched with sealing packing in a seal box at the upper part of a valve cover, extends out of a packing gland to be matched with a T-shaped nut on a bracket, is in transmission connection with the nut through threads and is connected with an actuating mechanism; double discs, namely, a left disc and a right disc are adopted and are obliquely arranged, the width of the upper part of a gap between the left disc and the right disc is larger than that of the lower part of the gap, springs are arranged between the left disc and the right disc for connection, a wedge cam with a wedging function is arranged between the left disc and the right disc, and the upper ends of the double discs, namely, the left disc and the right disc are nested together through an upper baffle. According to the double-disc wedge gate valve, spring connection is adopted, the distance between the sealing surfaces can be automatically adjusted, and the defect of absence of interchangeability of conventional products is overcome. Due to the adjusting performance of the springs, the phenomena of wedge failure frequently occurring to the conventional gate valves at the high temperature are reduced, the temperature change can be automatically adjusted through the springs, and the double-disc wedge gate valve is particularly suitable for being used as valves of a power station in the high-temperature environment.
Description
Technical field
The present invention relates to a kind of switch valve of flow medium, especially a kind of spring connects wedge-type self-pressure double-flashboard gate valve.
Background technique
Along with the fast development of Chinese industrial in recent years, in fluid-transporting tubing, the application of valve is more and more extensive, also more and more comes into one's own; And in numerous valve control system, gate valve usage quantity in numerous valve comes out at the top, it is more and more important that this just makes the technology innovation of gate valve become.And the gate valve used in modern pipeline fluid course of conveying due to flashboard be integrated type or left and right flashboard assembling time be fixed into nonadjustable integral type, be hard contact when ram seal face is contacted with valve body sealing surface, sealing surface is caused to be easy to wearing and tearing, have very large frictional force between valve seat and sealing surface during keying, cause that sealing surface is easy to wear, the usability that has a strong impact on Sealing and life-span; The second, traditional gate valve in use, is all generally that the sealing surface of downside is want first contacting valve seat in closing process, and Long-Time Service causes the wearing and tearing of the ram seal of downside pair to want upside bigger than normal, thus causes upside to shut, and downside also exists leakage; Three, traditional integral type flashboard sealing surface substantive requirements of form are very tight, generally can only manufacture in production, cause product non-interchangeability in maintenance process, especially in Large-scale machine set uses, when breaking down, because it does not have interchangeability, seriously extended engineering time; Four, to traditional Wedge gate valve, no matter be manually-operated gate or electric valve, generally all do not consider switch indicating device, also switching position point cannot be accurately set, user operation can only be carried out with feel by rule of thumb with debugging, not to be tension be exactly pine, tension can cause killing or abrading sealing surface, cross Song Zeyi cause in leak.Be difficult to accurately align position, for failsafe valve buries congenital hidden danger.
Summary of the invention
The invention provides a kind of complex spring and connect Wedge type double gate board gate valve, employing spring connects, the distance between sealing surface is made to have automatic regulation function, solve the defect of conventional products non-interchangeability, equally due to the adjusting function of spring, the dead phenomenon of the wedge that traditional gate valves is often occurred when high temperature reduces, and automatically can be regulated by spring temperature variation, this is especially practical for the power station valve under hot environment.
A kind of complex spring connects Wedge type double gate board gate valve, it comprises valve body, flashboard, valve rod, valve gap, filler, Gland, support, valve rod T-nut, bearing, the fastening piece composition of bearing gland and all connections, valve rod upper end coordinates with the stuffing box packing in valve gap top seal letter and stretches out Gland, coordinate with the T-nut on support, connected by screw-driven, link together with actuator again, T-nut cylindrical and thrust-bearing close-fitting, described flashboard is double-flashboard, it comprises left flashboard and right flashboard, left, right flashboard is obliquely installed, width top is greater than bottom between the two, be provided with spring in the middle of double-flashboard to connect, and on a left side, the wedge-type cam of band wedging action is provided with between right flashboard, double-flashboard upper end overhead gage is by a left side, right flashboard is nested together, described valve rod bottom is hemisphere, it is driveed between the flashboard of left and right.
Above-mentioned spring comprises lower springs and middle part spring, welds between spring with flashboard.
Middle road pad is provided with between above-mentioned valve body and valve gap.
On above-mentioned valve body angular sealing surface, heap is welded with hard alloy layer, and on left and right flashboard two inclined-plane, correspondence is also welded with hard alloy layer.
Above-mentioned actuator for manually or for electronic or surge or Composite Transmission, make the rotation motion of valve rod screw mandrel by its transferring power, drives flashboard to move up and down and ensure the opening and closing action of valve.
Support outside above-mentioned bearing is provided with oil hole, is provided with lubricating cup in hole.
The present invention has following beneficial effect:
1, the present invention adopts the double-flashboard of spring Connecting format, conventional valves can only open and close by rule of thumb in use with debug process, the double-flashboard gate valve of this spring Connecting format has indicating positions and the stroke limit position of valve opening and closedown, effectively prevent the too tight or too loose phenomenon of switch that conventional valves often occurs, both protect sealing surface not damage because of tension, also prevent the interior leakage phenomenon of pine and appearance; Decrease many artificial faults, greatly reduce the rigors to user, facilitate execute-in-place, reduce installation and the operation maintenance requirement of product.
2, traditional double-flashboard Wedge gate valve is made up of upper and lower supporting plate, left and right flashboard, flashboard frame, more than ten parts such as the top heart etc., loosely organized, and root tool withdrawal groove or the fracture of pinhole place in operation, flashboard come off or the fault such as flashboard frame fracture often occurs; Spring is directly connected the form of left and right flashboard by this novel employing, and traditional component part quantity is reduced half, and the probability that above fault is occurred reduces half.
3, traditional double-flashboard is seen in opening and closing process, and because flashboard is fixing or all-in-one-piece, so high to both sides sealing face angle requirement, general enterprises can only join work, product non-interchangeability; This novel employing spring connects, and makes the distance between sealing surface have automatic regulation function, solves the defect of conventional products non-interchangeability.Equally due to the adjusting function of spring, the dead phenomenon of the wedge that traditional gate valves is often occurred when high temperature reduces, and automatically can be regulated by spring temperature variation, this is especially practical for the power station valve under hot environment.
4, the present invention is owing to eliminating the constituent elements of the half complexity such as the flashboard frame of traditional double flashboard constituent element, reduces assembling difficulty, decreases installation time, improve efficiency of assembling, thus reduce the manufacture cost of valve.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
See Fig. 1, a kind of complex spring connects Wedge type double gate board gate valve, and it comprises valve body 24, flashboard, valve rod 5, valve gap 25, filler 10, Gland 17, support 18, valve rod T-nut 26, bearing 28, the fastening piece 6-8 of bearing gland 29 and all connections, 11-16, 19-20 forms, concrete structure and the assembling mode of each fastener assembly are prior art, valve rod upper end coordinates with the stuffing box packing in valve gap top seal letter and stretches out Gland, coordinate with the T-nut on support, connected by screw-driven, then link together with actuator 21, T-nut cylindrical and thrust-bearing close-fitting, it is characterized in that: described flashboard is double-flashboard, it comprises left flashboard 2 and right flashboard 3, left, right flashboard is obliquely installed, and width top is greater than bottom between the two, is provided with spring 1 in the middle of double-flashboard, 4 connect, and on a left side, be provided with between right flashboard band wedging action wedge-type cam 22, double-flashboard upper end with overhead gage 23 by a left side, right flashboard is nested together, and described valve rod bottom is hemisphere, and it is driveed between the flashboard of left and right.
Preferably, described spring comprises lower springs 1 and middle part spring 4, welds between spring with flashboard.Middle road pad 9 is provided with between described valve body and valve gap.On valve body angular sealing surface, heap is welded with hard alloy layer, and on left and right flashboard two inclined-plane, correspondence is also welded with hard alloy layer.Described actuator for manually or for electronic or surge or Composite Transmission, make the rotation motion of valve rod screw mandrel by its transferring power, drives flashboard to move up and down and ensure the opening and closing action of valve.Support outside described bearing is provided with oil hole, is provided with lubricating cup 27 in hole.
The open-shut device of gate valve is flashboard, and moving direction and the flow direction of flashboard are perpendicular, and gate valve can only make standard-sized sheet and complete shut-down, can not make adjustments and throttling.Flashboard has two sealing surfaces, two sealing surfaces of the most frequently used pattern gate valve form wedge shape, key groove is different with valve parameter, be generally 5 °, lifting bar there is trapezoidal thread, by the guide groove on the nut of valve tip actuator (such as handwheel) and valve body, rotary motion is become straight line motion, namely operation torque is become operation thrust.During Open valve, when flashboard lifting height equals the 1:1 times of valve latus rectum, the passage of fluid is completely unimpeded.
The present invention has switch open-shut device, valve body and actuator to combine.The modes such as actuator can provide manually as requested, surge, pneumatic, electronic or interlock, valve body can require provide many clocks types of material according to corrosivity; Core double-flashboard is linked together by multiple spring, cam with wedging action is clipped in the middle of double-flashboard, the valve rod head connecting flashboard makes the circular arc pattern that can form balance tension with flashboard, in closing process, utilize very well valve rod head from wedging action, the pulling force overcoming spring together with cam makes sealing reach optimum efficiency; In the process of opening, first valve rod rises, and double-linked cam is together to the pressure release of double-flashboard sealing surface, and spring natural shrinking, makes ram seal face be separated with valve body sealing surface, then drives double-flashboard to rise, until enable possition by valve rod.In whole process, because spring automatically resets ability, first contact the situation of valve body sealing surface on the downside of the flashboard occurred when just avoiding each throttle down, also just extend the wearing-in period of sealing surface largely, the working life of this valve is once extended.
This spring connects Wedge type double gate board gate valve, it mainly comprises main valve, main valve is provided with actuator's part, described main valve comprises valve body, and valve body top is provided with bonnet, and valve gap is connected with valve body stud nut, double-flashboard is provided with in the middle part of valve body, be provided with spring in the middle of double-flashboard to connect, and with being with the wedge-type cam of wedging action, double-flashboard upper end overhead gage by left and light brake sleeve-board together.Valve gap top is provided with sealing, is provided with Packing seat and flexible graphite packing in packing cavity, above by the Gland fixing envelope pressure of swing bolt.Valve gap is connected with support stud nut, and pedestal upper end and valve stem contacts place are provided with Stem Mut and thrust-bearing, and side is provided with oil hole, blocks with lubricating cup, is topmost actuator, can joins different actuators as required.
This spring connects Wedge type double gate board gate valve, it is provided with the switching position and the stroke restricting means of this valve on support, the switching position of valve can accurately be located, can only experience or know that actuator cannot rise or decline and to have great advantage as limit position later relative to the gate valve switch in past, thus valve tension or excessively loose can not be caused, would not occur that the problem such as sealing surface or interior leakage is killed or abraded to valve.
After valve opening, after flashboard raises up and departs from sealing surface, left and right flashboard furthers by spring, and cam gets back to the state of not stressing, and valve rod head arc surface recovers the state that do not stress, relative distance between double-flashboard is less than the relative position between valve body right-left seal face, when valve needs to close, actuator provides moment to be promoted by valve rod downwards, valve rod drives flashboard assembly to move down, because flashboard is close together by spring tension, more easily wedge between right-left seal face, arrive sealing station bottom flashboard after, flashboard no longer moves down, valve rod continues to move down until valve rod head arc surface touches the inwall of left and right flashboard, just left and right flashboard is extruded, the pulling force overcoming spring forces left and right flashboard relatively to open, cam also gravitate glides, accelerate flashboard to open, make together with flashboard and valve body sealing surface fit tightly more, more stable and sealing and Geng Gao leakage class is had compared with common double flashboard, more well can overcome the uneven wild effect caused in left and right.
Claims (6)
1. complex spring connects a Wedge type double gate board gate valve, and it comprises valve body (24), flashboard, valve rod (5), valve gap (25), filler (10), Gland (17), support (18), valve rod T-nut (26), bearing (28), fastening piece (the 6-8 of bearing gland (29) and all connections, 11-16, 19-20) form, valve rod upper end coordinates with the stuffing box packing in valve gap top seal letter and stretches out Gland, coordinate with the T-nut on support, connected by screw-driven, link together with actuator (21), T-nut cylindrical and thrust-bearing close-fitting, is characterized in that again: described flashboard is double-flashboard, it comprises left flashboard (2) and right flashboard (3), left, right flashboard is obliquely installed, and width top is greater than bottom between the two, is provided with spring (1 in the middle of double-flashboard, 4) connect, and on a left side, be provided with between right flashboard band wedging action wedge-type cam (22), double-flashboard upper end with overhead gage (23) by a left side, right flashboard is nested together, and described valve rod bottom is hemisphere, and it is clipped between the flashboard of left and right.
2. complex spring according to claim 1 connects Wedge type double gate board gate valve, it is characterized in that: described spring comprises lower springs (1) and middle part spring (4), welds between spring with flashboard.
3. complex spring according to claim 1 connects Wedge type double gate board gate valve, it is characterized in that: be provided with middle road pad (9) between described valve body and valve gap.
4. the complex spring according to claim 1 or 3 connects Wedge type double gate board gate valve, it is characterized in that: on valve body angular sealing surface, heap is welded with hard alloy layer, and on left and right flashboard two inclined-plane, correspondence is also welded with hard alloy layer.
5. complex spring according to claim 1 connects Wedge type double gate board gate valve, it is characterized in that: described actuator is for manually or for electronic or surge or Composite Transmission, make the rotation motion of valve rod screw mandrel by its transferring power, drive flashboard to move up and down and ensure the opening and closing action of valve.
6. complex spring according to claim 1 connects Wedge type double gate board gate valve, it is characterized in that: the support outside described bearing is provided with oil hole, is provided with lubricating cup (27) in hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410370511.2A CN105318025A (en) | 2014-07-31 | 2014-07-31 | Double-disc wedge gate valve adopting composite spring connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410370511.2A CN105318025A (en) | 2014-07-31 | 2014-07-31 | Double-disc wedge gate valve adopting composite spring connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105318025A true CN105318025A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410370511.2A Pending CN105318025A (en) | 2014-07-31 | 2014-07-31 | Double-disc wedge gate valve adopting composite spring connection |
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| CN (1) | CN105318025A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869867A (en) * | 2018-09-11 | 2018-11-23 | 铜陵爱阀科技有限公司 | It seals in one kind from release inside screw nonrising stem type gate valve |
| CN111120672A (en) * | 2020-01-21 | 2020-05-08 | 石家庄耐斯特机械阀业有限公司 | Special valve for under-pressure hole opening |
| CN114719040A (en) * | 2022-04-11 | 2022-07-08 | 浙江伯特利科技股份有限公司 | Flashboard of support-shrinkage type wedge gate valve and machining method thereof |
-
2014
- 2014-07-31 CN CN201410370511.2A patent/CN105318025A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869867A (en) * | 2018-09-11 | 2018-11-23 | 铜陵爱阀科技有限公司 | It seals in one kind from release inside screw nonrising stem type gate valve |
| CN111120672A (en) * | 2020-01-21 | 2020-05-08 | 石家庄耐斯特机械阀业有限公司 | Special valve for under-pressure hole opening |
| CN114719040A (en) * | 2022-04-11 | 2022-07-08 | 浙江伯特利科技股份有限公司 | Flashboard of support-shrinkage type wedge gate valve and machining method thereof |
| CN114719040B (en) * | 2022-04-11 | 2023-06-16 | 浙江伯特利科技股份有限公司 | Gate plate of telescopic wedge gate valve and processing method thereof |
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Application publication date: 20160210 |