CN203670846U - Flat gate valve with under-pressure replace valve rod and balance rod - Google Patents

Flat gate valve with under-pressure replace valve rod and balance rod Download PDF

Info

Publication number
CN203670846U
CN203670846U CN201420035400.1U CN201420035400U CN203670846U CN 203670846 U CN203670846 U CN 203670846U CN 201420035400 U CN201420035400 U CN 201420035400U CN 203670846 U CN203670846 U CN 203670846U
Authority
CN
China
Prior art keywords
valve
plate
balancing pole
pressure
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201420035400.1U
Other languages
Chinese (zh)
Inventor
龚伟安
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi'an Dongxin Petroleum Equipment Plant Co Ltd
Original Assignee
Xi'an Dongxin Petroleum Equipment Plant Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xi'an Dongxin Petroleum Equipment Plant Co Ltd filed Critical Xi'an Dongxin Petroleum Equipment Plant Co Ltd
Priority to CN201420035400.1U priority Critical patent/CN203670846U/en
Application granted granted Critical
Publication of CN203670846U publication Critical patent/CN203670846U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides a flat gate valve with an under-pressure replacing valve rod and a balance rod; based on the flat gate valve structure in the oil and gas exploitation industry, the flat gate valve comprises four points of novel design that: 1, the preloaded pressure of a valve seat is enlarged, a valve seat sealing element is added, and thus the sealing reliability of a valve plate in the close state is improved; 2, the balance rod can be fixed on a fixed seat when the valve plate is in the close state; 3, when the valve plate is in the close state, the valve rod can be freely demounted in a T-shaped groove of the valve plate; 4, two air-release valves corresponding to the upper and lower cavities of the valve plate are added to ensure the safety of the operation. Thereby, when the flat gate valve is under pressure, except the valve body, the valve seat and the valve plate which cannot be replaced, other components all can be replaced or maintained on a high-pressure wellhead. The flat gate valve is a novel branch of the field of under-pressure valve replacement, and undoubtedly has great significance for safety and environment protection and economic and social benefits in the under-pressure operation of the oil and gas wellheads.

Description

A kind of plate valve with replace with pressure valve rod and balancing pole
Technical field
The utility model belongs to the technical field of rock gas and oil exploration industry, particularly a kind of plate valve with replace with pressure valve rod and balancing pole.
Background technique
In high-pressure natural gas and oil exploration industry, it is a dangerous operation that wellheadpressure is changed gate valve.But, its advantages: the first, can not pollute and stop up payzone and affect output; The second, not kill-job greatly reduces operating cost, has shortened the off-time; The 3rd, greatly reduce the seepage of the outer leakage quantity of oil, gas and operation liquid, protect environment.Therefore, Ge great produce oil state all pays much attention to this technology, and the U.S., Russia can carry out the operation of non-well killing change wellhead sluice valve, but respectively have feature.China has carried out this technological development very early, its solution route is all not identical with the U.S. and Russia, its feature is shown in Chinese patent ZL200420092307.0 " device For Changing Valve Of High-pressure Natural Gas Recovery Well Without Well Killing ", has implemented the operation of more than 200 mouthful of replace with pressure gas production wellhead gate valve according to this patent at home and abroad.But all operations are both at home and abroad all to change whole gate valve.In real work, find, the gate valve that leaks outside that some damages because of Sealing, because misoperation causes the gate valve of valve rod bending deflection, fracture; After long-term stopping production, the wait indefinitely gate valve of defect of operation piece rust, all need not change whole gate valve, as long as keep in repair, removable parts component get final product restore funcitons.Often in shape for ensureing gas production wellhead gate valve, if it is also very necessary to carry out preventive maintenance.
Having not yet to see a kind of gate valve has band and depresses the open report of changing the component such as valve rod and balancing pole function.
Summary of the invention
The purpose of this utility model is being widely used on the basis of the balanced type plate valve in high pressure oil and gas exploitation industry, design a part of new structure, to build a kind of Novel flat plate gate valve with replace with pressure valve rod and balancing pole, balance flap type after this improvement, can depress at band, change (or maintenance) all component except gate valve body, valve component and valve plate.
The purpose of this utility model is achieved in that a kind of plate valve with replace with pressure valve rod and balancing pole of design, it is by valve body (1), valve seat (2), valve plate (3), valve rod (4), balancing pole (5) and fixed base (6) and bleed valve (7) composition, it is characterized in that, valve seat is arranged on the both sides of valve body center-aisle, and compress valve plate, valve plate upper end connects valve rod, valve plate lower end connects balancing pole, under replace with pressure valve rod state, balancing pole is connected with positioning seat, on bleed valve and valve plate, lower cavity communicates, described valve seat (2), it is characterized in that, top 8~10 powerful loaded springs of uniform installation (8), the Sealing (9) of the three resistance to rock gas corrosion in road is housed on valve seat external cylindrical surface, valve seat and valve body are slidably matched, under pressure promotes, can be in axial sliding, described balancing pole (5) and positioning seat (6), it is characterized in that, the T-shaped groove of balancing pole (5) upper end is connected with valve plate (3) lower end, balancing pole lower end is processed with box thread (10), changing under the state of valve rod, be fixed on fixed base (6) with holding down bolt (11), described valve rod (4), it is characterized in that, the T-shaped groove connecting head on valve rod and valve plate is processed into rectangular (12), and at valve plate under closed condition, can freely carry out dismounting with valve plate, the external diameter at its sealing position is identical with balancing pole external diameter, described bleed valve (7), it is characterized in that, on bleed valve body, there is screw thread to be connected with top cover (13), in top cover, there is venting bar (14), under venting bar, it is spherical single current valve ball (15), there is loaded spring (16) its underpart, make valve ball be pressed on ball seat and sealing, spring supporting is on bearing pin (17), the lower end of bleed valve body is tapered thread, be arranged in the upper and lower chamber of valve plate corresponding central enclosure and balance housing, and have aperture to be connected with cavity.
The beneficial effects of the utility model are: the utility model is to existing balance plate valve, 4 new designs are adopted: 1. the precompressed mode of valve seat changes uniform Compress Spring into, valve seat and valve plate sealing precompression are significantly promoted, increase the sealability of valve seat and gate valve body, in off position, improve the reliability of the two sealing; 2. increased position structure at balancing pole place; 3. valve rod, can be by disassembled and assembled freely in the T-shaped groove of valve plate under valve plate closed condition; 4. be installed in addition with the bleed valve of the upper and lower cavity of valve plate, for the operation of changing valve rod and balancing pole provides safety assurance.The design of these new structures, can ensure under the prerequisite of safety, to the rock gas balance flap type of on-line operation, except gate valve body, valve seat and valve plate can not keep in repair and change, all component all can keep in repair or change, therefore for produced on-site provides a kind of new method that does not need integral replacing gate valve.This model utility technology is a new branch that changes valve field with pressure, to safety and environmental protection, economic benefit, social benefit in petroleum gas well head Operating Pressure, without being suspected to have greater significance.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model valve seat.
Fig. 3 is the structural representation of the utility model balancing pole.
Fig. 4 is the structural representation of the utility model balancing pole positioning seat.
Fig. 5 is the structural representation of the utility model valve rod.
Fig. 6 is the structural representation of the utility model bleed valve.
Fig. 7 is the structural representation while changing valve rod.
Fig. 8 is the structural representation while changing balancing pole.
In figure, 1-valve body; 2-valve seat; 3-valve plate; 4-valve rod; 5-balancing pole; 6-fixed base; 7-bleed valve; 8-Sealing; The powerful loaded spring of 9-; 10-box thread; 11-holding down bolt; 12-rectangular valve rod connecting head; 13-top cover; The 14-bar of exitting; 15-single current valve ball; 16-loaded spring; 17-bearing pin; 18-balance housing; 19-central enclosure; 20-high-pressure natural gas; 21-valve rod operation handwheel.
Embodiment
Fig. 1 is the structural representation under the utility model working state.In illustrated embodiment, two valve seats (2), be arranged on valve body (1) channel middle, and compress valve plate (3), valve rod (4) and balancing pole (5) the respectively T-shaped groove upper and lower with valve plate are connected, balancing pole positioning seat (6), be contained on balance housing (12), bleed valve (7) is arranged on respectively balance housing (18) and central enclosure (19) is upper, has aperture to be communicated with upper plenum with the lower cavity of valve plate (3) respectively.
The utility model is work like this, if need to change (or maintenance) valve rod (4) and attached component thereof, such as plane bearing, valve rod sealing member, steel gasket ring etc.: the first step, want closing gate valve, at this moment valve seat block is on valve plate, requires gate valve to block the working pressure that should reduce downstream after rock gas simultaneously, and step-down is the bigger the better, because pressure drop will impel the contact between valve plate and outlet end valve seat to increase, the unfailing performance of sealing is improved, second step, dextrorotation bleed valve top cover (13), press off single current valve ball (15) by venting bar (14), upper by valve plate (3), the residual residual air of cavity of resorption discharges, now the Pressure Drop outside the valve seat of inlet end is to barometric pressure, valve seat is done axial displacement under the promotion of high-pressure natural gas, make to increase with the contact of valve plate, so improved the sealing load between valve seat and valve plate, under normal circumstances, after venting, two bleed valves should not have any gas to discharge, if also have gas leak phenomenon to occur, this gate valve is unsuitable for keeping in repair by this method, the 3rd step, is pressed on balancing pole on fixed base (6) with holding down bolt (11), the 4th step, removes the above all component of central enclosure (19) by part, as shown in Figure 7, after repairing, presses contrary step restore funcitons.If need to change (or maintenance) balancing pole (5) and associate member thereof, such as Sealing, steel gasket ring etc., constant according to above-mentioned steps one, two, when the 3rd step, valve rod should be operated to handwheel (21) by valve rod fixing, the operating position of closing gate valve is not moving again; The 4th step, removes all component below balance housing by part, as shown in Figure 8, after repairing, presses contrary step restore funcitons.

Claims (5)

1. one kind has the plate valve of replace with pressure valve rod and balancing pole, it is made up of valve body, valve seat, valve plate, valve rod, balancing pole, fixed base and bleed valve, it is characterized in that, valve seat is arranged on the both sides of valve body central passage, and compresses valve plate, and valve plate upper end connects valve rod, valve plate lower end connects balancing pole, under replace with pressure valve rod state, balancing pole is connected with fixed base, and two bleed valves communicate with the upper and lower cavity of valve plate respectively.
2. a kind of plate valve with replace with pressure valve rod and balancing pole according to claim 1, it is characterized in that, 8~10 powerful loaded springs of the uniform installation in described valve seat top, the Sealing of the three resistance to rock gas corrosion in road is housed on valve seat external cylindrical surface, valve seat and valve body are slidably matched, under pressure promotes, can be in axial sliding.
3. a kind of plate valve with replace with pressure valve rod and balancing pole according to claim 1, it is characterized in that, the T-shaped groove of described balancing pole upper end is connected with the T-shaped groove of valve plate lower end, balancing pole lower end is processed with box thread, changing under the state of valve rod, be fixed on fixed base with holding down bolt.
4. a kind of plate valve with replace with pressure valve rod and balancing pole according to claim 1, it is characterized in that, on described valve rod and valve plate, the connecting head of T-shaped groove is processed into rectangular, and can be at valve plate under closed condition, can freely carry out dismounting with valve plate, the external diameter at its sealing position is identical with balancing pole.
5. a kind of plate valve with replace with pressure valve rod and balancing pole according to claim 1, it is characterized in that, screw thread on described bleed valve body is connected with top cover, and venting bar is housed in top cover, and venting bar lower end is single current valve ball, there is loaded spring its underpart, make valve ball be pressed on ball seat and sealing, spring seat is on bearing pin, and bleed valve body lower end is taper pipe thread, be arranged in the upper and lower chamber of valve plate corresponding central enclosure and balance housing, and have aperture to communicate with cavity.
CN201420035400.1U 2014-01-16 2014-01-16 Flat gate valve with under-pressure replace valve rod and balance rod Active CN203670846U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420035400.1U CN203670846U (en) 2014-01-16 2014-01-16 Flat gate valve with under-pressure replace valve rod and balance rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420035400.1U CN203670846U (en) 2014-01-16 2014-01-16 Flat gate valve with under-pressure replace valve rod and balance rod

Publications (1)

Publication Number Publication Date
CN203670846U true CN203670846U (en) 2014-06-25

Family

ID=50967144

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420035400.1U Active CN203670846U (en) 2014-01-16 2014-01-16 Flat gate valve with under-pressure replace valve rod and balance rod

Country Status (1)

Country Link
CN (1) CN203670846U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104089036A (en) * 2014-07-02 2014-10-08 普胜特能源(广汉)服务有限公司 Gate valve applicable to high temperature, high pressure, high sand contents and highly-corrosive mediums
CN104676027A (en) * 2015-01-29 2015-06-03 成都绿迪科技有限公司 Hydraulic flat valve
CN104790907A (en) * 2015-03-16 2015-07-22 宝鸡石油机械有限责任公司 Tubing head blocking isolating valve for fracture wellhead device
CN106368649A (en) * 2016-10-13 2017-02-01 西安东新石油设备厂有限公司 Full-airtight high pressure valve leakage treatment device and method
CN110608307A (en) * 2018-06-14 2019-12-24 中国石油化工股份有限公司 Gate valve body and manufacturing method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104089036A (en) * 2014-07-02 2014-10-08 普胜特能源(广汉)服务有限公司 Gate valve applicable to high temperature, high pressure, high sand contents and highly-corrosive mediums
CN104676027A (en) * 2015-01-29 2015-06-03 成都绿迪科技有限公司 Hydraulic flat valve
CN104790907A (en) * 2015-03-16 2015-07-22 宝鸡石油机械有限责任公司 Tubing head blocking isolating valve for fracture wellhead device
CN106368649A (en) * 2016-10-13 2017-02-01 西安东新石油设备厂有限公司 Full-airtight high pressure valve leakage treatment device and method
CN106368649B (en) * 2016-10-13 2018-08-24 西安东新石油设备厂有限公司 A kind of totally-enclosed high pressure valve leakage controlling device and method
CN110608307A (en) * 2018-06-14 2019-12-24 中国石油化工股份有限公司 Gate valve body and manufacturing method thereof

Similar Documents

Publication Publication Date Title
CN203670846U (en) Flat gate valve with under-pressure replace valve rod and balance rod
CN202646808U (en) High-pressure electromagnetic air control decompression valve
CN102620017A (en) High-pressure electromagnetic pneumatic-control decompression valve
CN201593397U (en) Downhole safety valve for oil and gas wells
CN202510785U (en) High-temperature high-pressure pneumatic control automatic pressure release valve
CN102606760A (en) Nuclear class I electric ball valve
CN205479678U (en) Movable fit leakage control ware
CN202432032U (en) Swing check valve
CN204420230U (en) A kind of high-pressure solenoid valve of docking with pressure reducing regulator
CN2699071Y (en) Oilfield Balanced type cut-off valve
CN204176020U (en) Low temperature fills formula beveled ball valve
CN206112097U (en) Petroleum casing pipe static pressure type hydrostatic testing machine high pressure fills valve
CN101832418A (en) Quick automatic cut-off instrument valve
CN204985750U (en) Poor warm water governing valve that subtracts of high pressure
CN102562050B (en) Reduce the method for intelligent water detector switch plunger pressure and intelligent water detector mechanical switch
CN202370510U (en) Mechanical switch for intelligent water detector
CN204900855U (en) Novel ethylene schizolysis butterfly valve
CN203131095U (en) ball valve capable of achieving self-compensation for valve ball abrasion
CN207609641U (en) A kind of electrohydraulic actuator for reciprocating compressor amount regulating system
CN203248756U (en) Novel ultrahigh-pressure and high-flow charging or filling valve
CN202469169U (en) Pressure pilot valve
CN201865623U (en) High temperature and low temperature resistant flat valve with pressure balancing hole
CN202125621U (en) Quick cylinder closing valve for ship
CN202531893U (en) Top-entry ball valve
CN106439095B (en) Integrated combination valve

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant