CN1687620A - Valve of underground well for controlling gas - Google Patents
Valve of underground well for controlling gas Download PDFInfo
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- CN1687620A CN1687620A CN 200510065898 CN200510065898A CN1687620A CN 1687620 A CN1687620 A CN 1687620A CN 200510065898 CN200510065898 CN 200510065898 CN 200510065898 A CN200510065898 A CN 200510065898A CN 1687620 A CN1687620 A CN 1687620A
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Abstract
The invention relates to the gas-controlled ground well valve, which comprises the interface valve, the main valve and the gas-controlling valve. The interface valve connects the interface base, the guide piston pole inserts in the guide piston spring base, and the guide piston spring is sleeved outside of the piston pole and the spring base; the main piston of the main valve is on the bottom of the main valve base, and the main piston sleeve is outside of the main piston, the main piston springs is between the spring bases, and the side walls of the main piston sleeve have the oil apertures; the gas-control valve piston is at the upper part of the cylinder, the top of the connecting rod connects the bottom of the piston, and the bottom of the connecting rod joints the spring locating sleeve with the oil apertures; the inner wall of the cylinder has the baffle with its central aperture connecting the middle of the connecting rod; the spring locating slot is at the bottom of the cylinder; the oil inlet aperture at the bottom of the cylinder connects the oil transferring pipe; the spring is between the locating sleeve and the locating slot; the oil aperture on the cylinder wall communicates with the main valve chamber; the oil aperture is below the baffle of the cylinder; the air-through hole connects the inlet hole through the air pipe and the interface valve base.
Description
Technical field
The present invention relates to a kind of valve, especially a kind of valve of underground well that is mainly used in fuel loading system and adopts gas control.
Background technique
With the airport is example, fuel loading system is one of its important equipment, and its structural design and relationship between quality are to the safety of passenger, aircraft and airport installation, wherein, valve of underground well is the vitals in the bolt formula fuel loading system, is the interface of pipeline refuelling truck and machine level ground pipe network system fuel oil output.
Existing valve of underground well by main piston, main piston spring, test valve (filter screen), guide piston, pilot valve, pressure unit valve, safeguard that valve, pull bar and housing etc. are formed and (edit referring to Zhu Xiaofeng, the aviation fuels special equipment is repaired, Beijing: Chinese legal system publishing house, 2000,347-348).When the ground well joint of pipeline refuelling truck with after valve of underground well is connected, ground well joint switch end face contacts with the pressure relief device at valve of underground well top, fore-set is moved down, and the oil stream in the valve chest just from inside outwards overflows, and has reduced the effect that reaches system's intermediate fuel oil pressure in the valve body chamber.When operation ground well threshold switch device up spurs pull bar, valve of underground well is opened, fuel oil is just from the slotted eye of piston intermediate hole, be back to the ingress along endoporus toward the switch duct, the piston wall inner chamber is subjected to the effect of spring force, because outer end fuel pressure P1 is greater than main piston inner wall pressure P2, just promoting main piston up moves, the main piston spring is compressed, the fuel inlet degree increases gradually, the piston apparatus of two-part up and down in the valve pit is opened, and fuel oil enters in the oil transport pipelines such as ground well joint and flexible pipe after promptly flowing through the valve of underground well cavity.After oiling finishes, manually unclamp the graceful switch knob of slow-witted moral of pipeline refuelling truck, close ground well joint valve, use handling Drawing switch stay cord simultaneously, switch resets, the middle slotted eye (oil duct) of switch gear left end just is directed to the return of valve and blocks at this moment, fuel oil just is full of the valve pit inner chamber, and main piston inner wall pressure P2 increases and greater than fuel pressure P1, it moved down, it is intact that main piston is engaged with the valve chest inwall, and fuel oil stops to flow.
Obviously, the major defect of existing valve of underground well existence is:
One, its valve body is integrated, and the whole valve body of high about 50cm need be arranged in the ground well of the about 60cm of the degree of depth, and the center is higher, design unreasonable, in refueling process, the damage of external force in case valve of underground well has an accident, valve body is easily from waist or root fracture, then will cause a large amount of leakages of machine level ground pipe network system fuel oil, form more than 20 meters high oil column, and the splash four directions, the safety that seriously jeopardizes passenger, aircraft and other facilities, if deal with improperly, consequence is hardly imaginable.According to another report, 1997 on airport, Britain Heathrow, because the luggage waggon has bumped against ground well oiling bolt when reversing, valve of underground well is severed, and urgent drag-line is stuck, and in the very first time separating valve does not cut out, and has closed the oil pump of oil depot by pressing urgent termination of pumping button afterwards, just stop bleed, but run oily 6500L.Owing to giving in the B747 aircraft refuelling process with the pipeline car, the ancon of ground well joint valve occurred the crack suddenly and began horizontal oil spout on the Auckland, NZL airport nineteen ninety-five, and the crack enlarges rapidly, and up to fracture, aviation fuel is sprayed onto 25 meters high.And urgent drag-line is held by oil spout, and oiling person does not close separating valve in the very first time, approximately through 12 seconds, just closes separating valve by urgent drag-line, but has run the about 3000L of oil.1993 Nigeria Mohammed, founder of Islam Lagos airport and January 6 nineteen ninety-five on the Auckland, NZL airport, after the ground well joint has been changed wheel carrier, owing to install defective (having used the bolt that falls short of), in refueling process, joint comes off, cause the first accident to run oily 17000L, second accident run oily 3000L.Similar accident also once took place in China.
Two, need manual control switch's valve of underground well, pull on switch lever during unlatching, collude stay cord (when being convenient to close pulling or spur during urgency); Pulling stay cord when closing, it just can't close valve of underground well when following situation was arranged: if 1 valve of underground well bumps scraped, valve body just tilts on one side to stay cord, and rope is pushed down or broken.2, stay cord is pushed down because of carelessness or is teased by other object.3, the stay cord hook pulls or stay cord is broken, and is in the time of need closing if any urgency, ineffective.4, when running into rainy season, upwards the pull bar of pulling is lubricated inadequately sometimes, even the pulling stay cord, pull bar also can't return, and valve body still is in normally open.5, during oil spout, stay cord is held by oil easily.In addition, increased by a line and refueled personnel's burden, and operation is very cumbersome again, this is because 1), itself and valve of underground well switch to be buckled well before refueling; 2), also it will be unloaded after refuel finishing, be recovered on the car; 3), in the oiling, the oiling personnel will stand under the fuel tanker table, observe volume read-out, also want balance aircraft engine oil case, held the graceful handle of slow-witted moral in the hand, also will grab stay cord, sometimes a staff has bumped or oneself has spurred because of carelessness because of carelessness in, then valve just is closed, and the oiling personnel go to the valve of underground well limit again and open again, has increased many troubles.
Three, well depth reaches about 60cm, and its installation, maintenance, maintenance difficulties are big.
How improving the ground well oil supplying device, eliminate safe hidden trouble, is the difficult problem that present countries in the world civil aviaton industry all is faced with.What various countries adopted at present is the single counter measure, all is to adopt to place eye-catching marker, reminds passing vehicle to note, prevents to bump to scrape valve of underground well.
International Civil Aviation Organization has realized the seriousness of this problem, requires the airport, various countries that urgent termination of pumping system all will be installed.Its objective is that working as valve of underground well is destroyed, when on-the-spot valve of underground well can't be closed again, press this system control switch nearby, make the pump house termination of pumping, reduce loss and dangerous.Yet China has installed on the airport with the termination of pumping system of installing at present also a lot of deficiencys:
1, investment is big, and construction is inconvenient, the airport of particularly having built up, and its transformation is subjected to certain limitation.
2, it can't guarantee that each ground well location has corresponding control switch, and also has certain distance, and 20-30 rice, can't be tackled case of emergency by up to a hundred at most meters at least.When refueling personnel shortage, might can not think to have this control switch, and in case when the oil spout case of emergency occurring, but need second second must to strive.
3, switch is many, and circuit is long, not manageability.When causing circuit, fault, this system can't play a role and bring negative effect on the contrary, causes whole oil supply system the possibility of paralysis to occur.If can't fuel feeding, the airport just be faced with aircraft and can lowers, and does not but have oily outbound difficult situation.Similarly accident just appearred China airport this year for example during spring transportation.
Notification number is provided with the sulfuration of valve body and rubber seal and is the joint valve of one, equilibrated valve and separating valve for the patent application of CN2043697U provides a kind of valve of underground well, and compound plastics/rubber seal is adopted in its slipper seal place; Separating valve is the formula of surging, and by a two-way pilot valve control, this pilot valve is then handled by the handle of drag link mechanism and the draw ring of locking mechanism, and draw back and the shut-in time of separating valve are controlled by two metering holes.
Summary of the invention
The present invention is intended to the shortcoming that the valve of underground well at bolt formula fuel loading system for a long time exists, a kind of safe and reliable improved valve of underground well is provided, and the present invention adopts incorporate structural design of detachable replacement and Pneumatic valve to replace the manually technological scheme of control for this reason.
The present invention is provided with joint valve, joint valve is provided with joint valve body, joint valve base, guide piston, guide piston spring and guide piston spring seat, the ground well joint of the external pipeline refuelling truck in the top of joint valve body, the bottom of joint valve body is connected with the joint valve base, guide piston is located in the joint valve body, the piston rod of guide piston inserts in the guide piston spring seat, the guide piston spring seat is fixedly arranged on joint valve base upper surface center, and the guide piston spring housing is outside the piston rod and guide piston spring seat of guide piston;
Main valve, main valve is provided with main valve body, main valve seat, main piston, main piston cover and main piston spring, main valve body is located on the main valve seat, main piston is located at the main valve body inner chamber, the piston area of main piston is arranged at the fuel inlet of main valve seat bottom, and the main piston cover is enclosed within on the main piston, and the main piston spring is placed vertically between the spring seat of main piston piston area inboard and main piston cover internal surface spring seat, the piston area center of main piston is provided with fuel check valve (or one-way valve), and main piston cover top side wall is provided with oilhole;
Pneumatic valve, Pneumatic valve is provided with cylinder, piston, connecting rod, spring, spring setting sleeve and sealing nut, piston is located at the top in the cylinder, the top of connecting rod is connected with the bottom of piston, the middle part of connecting rod is taper, the bottom of connecting rod is connected with the upper surface of spring setting sleeve, the spring setting sleeve is provided with oilhole, tapering peripheral position corresponding cylinder inwall at the connecting rod middle part is provided with baffle plate, the tapering kiss at the mesopore of baffle plate and connecting rod middle part connects, on cylinder bottom, establish the spring locating slot, the oil inlet hole of cylinder block bottom is communicated with through the external oil transport pipeline of oil inlet passage and main valve seat, in the import of oil inlet passage, establish filter screen, spring is located between spring setting sleeve and the spring locating slot, on the cylinder wall between piston and the cylinder inner wall baffle plate, be provided with oil outlet, oil outlet is communicated with the main valve body inner chamber, on the cylinder wall below the cylinder internal baffle, be provided with and be used for overlapping the oilhole that oilhole is communicated with main piston, sealing nut is located at cylinder head, sealing nut is established vent, the breather line of vent in tracheae and joint valve base, external source of the gas inlet hole, said source of the gas is meant the source of the gas that is used to control Pneumatic valve, the external pipeline refuelling truck of source of the gas inlet hole ground well joint;
The pressure unit valve, the pressure unit valve is located at the top of the guide piston of joint valve.
Said Pneumatic valve can be located on the main valve body madial wall of main piston cover oilhole side, the oil inlet hole of cylinder block bottom is through oil inlet passage and be located at the intraparietal channel connection of main valve, the external oil transport pipeline of the intraparietal passage of main valve and main valve seat is communicated with, main piston cover oilhole is located at main piston cover top sidewall, establishes filter screen in the import of the intraparietal passage of main valve.The main piston that said Pneumatic valve also can be located at the main valve body inner chamber puts, the oil inlet passage of the oil inlet hole institute warp of cylinder block bottom and the channel connection of being located at main piston cover inner chamber, passage external oil transport pipeline bottom main valve body of main piston cover inner chamber is communicated with, and main piston cover oilhole is located at below, main piston cover top.
Said sealing nut vent can be arranged in the inlet hole of joint valve base lower surface, inlet hole by the joint valve base lower surface in the joint valve base extends the source of the gas inlet hole of breather line to the joint valve base upper surface, said source of the gas is meant the source of the gas that is used to control Pneumatic valve, the graceful tracheae of slow-witted moral of the external pipeline refuelling truck of source of the gas inlet hole ground well joint.
Working principle of the present invention is:
1, when the ground well joint of pipeline car be connected with the underground well for controlling gas valve joint intact after, ground well joint switch terminals contacts with the pressure unit valve at underground well for controlling gas valve joint top, make pressure unit valve push rod toward moving down, oil stream in the valve body overflows from the inside and outside, play and reduce in the valve body chamber and the effect of system's intermediate fuel oil pressure, this moment, the switch Joystick operation of valve of underground well joint was light, and valve of underground well joint and guide piston are opened easily.
2, the branch bronchus (about 30cm) of ground well joint and the graceful tracheae connection of slow-witted moral is connected with the Pneumatic valve inlet hole, press the graceful switch knob of holding of slow-witted moral, source of the gas is switched on, piston on the Pneumatic valve moves down under the effect of air pressure, the promotion connecting rod moves down, this moment, the oilhole at main piston cover top was communicated with the formation path with the oil outlet of Pneumatic valve, fuel oil in the main piston cover is through the oil outlet flow valves intracoelomic cavity of baffle plate mesopore to Pneumatic valve, the oil pressure of inflow pipeline is greater than the pressure of piston wall inner chamber at this moment, just promote to move on the main piston, piston spring is compressed, the import of fuel oil increases gradually, the piston apparatus of two-part up and down (referring to main piston and guide piston) in the valve body is all opened, and fuel oil enters in ground well joint and the oil transport pipeline after flowing to the valve of underground well body cavity swimmingly.
3, after oiling finishes, unclamp the slow-witted graceful switch knob of moral of pipeline refuelling truck, source of the gas is disconnected, and Pneumatic valve moves on the connecting rod of promotion Pneumatic valve under the effect of bottom spring force, blocks the oily passage between baffle plate and the connecting rod.This moment, the Pneumatic valve filler opening communicated with the oilhole of main piston cover, fuel oil enters in the main piston cover from the Pneumatic valve filler opening, the oil pressure that acts on the main piston inwall adds the pressure of the pressure of upper spring greater than inflow pipeline, this moment, main piston was downward, main piston engages intact with the main valve seat of valve interior wall bottom, fuel oil stops to flow, and the fuel oil of pipeline remains static.
The oilhole of the oil inlet hole of Pneumatic valve and main piston cover is in normal open state (valve of underground well is in closed condition) during non-refuelling.
This shows that when the present invention was practical, if valve body is installed in the oil inlet pipe road junction, valve of underground well joint base and valve of underground well joint were installed on the edge, oil pipe road junction.In ground well, can only see about 13cm valve of underground well joint and valve of underground well joint base, can't see valve body, the about 20cm of ground well depth, center of gravity is very low, is difficult for by the collision fracture.Even collided fracture from root, can not have influence on valve body yet, more can not have influence on shutoff device, oil in the inflow pipeline can not go out certainly in splash, its reasonable in design, adopt Pneumatic valve to replace manually-operable again, not only safe and reliable, and be convenient to install, maintenance and maintenance, operate easy again, as long as the slow-witted graceful switch of moral of control is also just being controlled the open and close of valve of underground well, and just can emergency shutdown in the short time at the utmost point, and need not to increase any optional equipment, can overcome the shortcoming that existing valve of underground well exists, economical and practical, and can save the extensive fund that fueling facility is transformed.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the structure for amplifying schematic representation of the Pneumatic valve of the embodiment of the invention 1.
Fig. 3 is the structural representation of the embodiment of the invention 2.
Embodiment
Embodiment 1
As Fig. 1, shown in 2, the present invention is provided with joint valve, main valve, Pneumatic valve and pressure unit valve.Joint valve is provided with joint valve body 1, joint valve base 2, guide piston 3, guide piston spring 4 and guide piston spring seat 5, the ground well joint of the external pipeline refuelling truck in the top of joint valve body 1, the bottom of joint valve body 1 is connected with joint valve base 2, guide piston 3 is located in the joint valve body 1, the piston rod 32 of guide piston 3 inserts in the guide piston spring seat 5, guide piston spring seat 5 is fixedly arranged on joint valve base 2 upper surface centers, and guide piston spring 4 is enclosed within outside the piston rod 32 and guide piston spring seat 5 of guide piston 3.Be provided with pressure unit valve 31 at the top of guide piston 3.
Main valve is provided with main valve body 6, main piston 7, main piston cover 8, main piston spring 9 and main valve seat 11.The top of main valve body 6 and joint valve base 2 lower surface peripheries link into an integrated entity, main piston 7 is located at main valve body 6 inner chambers, the piston area of main piston 7 is arranged on the main valve seat 11 of main valve body 6 bottoms, main piston cover 8 is enclosed within on the main piston 7, main piston spring 9 is placed vertically in the spring seat 72 of main piston 7 piston area inboards and main piston and is overlapped between the 8 internal surface spring seats 81, the piston area center of main piston 7 is provided with fuel check valve (or one-way valve) 73, and main piston overlaps 8 top side wall and is provided with oilhole 82.Main valve seat 11 is connected with the bottom of main valve body 6.
Pneumatic valve 10 is located on main valve body 6 madial walls that main piston overlaps 8 oilholes, 82 sides, and Pneumatic valve 10 is provided with cylinder 101, piston 102, connecting rod 104, spring 105, spring setting sleeve 106, sealing nut 108.Piston 102 is located at the top in the cylinder 101, the top of connecting rod 104 is connected with the bottom of piston 102, the middle part 109 of connecting rod 104 is taper, the taper bottom of connecting rod 104 is connected with the upper surface of spring setting sleeve 106, peripheral position corresponding cylinder 101 inwalls are provided with baffle plate 110 in the tapering at connecting rod 104 middle parts 109, the mesopore 1101 of baffle plate 110 connects with the tapering kiss at connecting rod 104 middle parts 109, oil inlet hole periphery in cylinder bottom is established the spring locating slot, the oil inlet hole 112 of cylinder block bottom is communicated with passage 63 and main valve seat in being located at main valve body 6 walls through oil inlet passage 62, passage 63 in main valve body 6 walls is communicated with the oil inlet hole of main valve seat 11, oil inlet hole at main valve seat 11 is established filter screen, main piston cover oilhole 82 is located at main piston cover top sidewall, spring 105 is placed vertically between the spring locating slot of piston setting sleeve 106 and cylinder bottom oil inlet hole periphery, on cylinder 101 walls between piston 108 and the cylinder inner wall baffle plate 110, be provided with oil outlet B, oil outlet B is communicated with main valve body 6 inner chambers, on 101 walls of the cylinder below the cylinder internal baffle 110, be provided with and be used for overlapping the oilhole C that oilhole 82 is communicated with main piston, sealing nut 108 is located at cylinder 101 tops, sealing nut 108 is established vent 113, the breather line 22 of vent 113 in breather line 21 and joint valve base 2 meets source of the gas inlet hole M, said source of the gas is meant the source of the gas that is used to control Pneumatic valve, the graceful tracheae of slow-witted moral of the external pipeline refuelling truck of source of the gas inlet hole M ground well joint.
Pressure unit valve 31 adopts pressure unit valve commonly used in the existing valve of underground well, generally form by spring, cross spool and valve seat, the upper end of cross spool is located on the guide piston of joint valve, the lower end is inserted on the spring, spring is placed vertically between cross spool and valve seat, valve seat is connected with the guide piston spring seat of joint valve, and valve seat is provided with the oilhole that is communicated with the guide piston inner chamber of joint valve.
Embodiment 2
As Fig. 1, similar to Example 1 shown in 2, its difference is that main valve body 6 and joint valve are separated into independently two parts.
Embodiment 3
As shown in Figure 3, similar to Example 1, its difference is that Pneumatic valve is located on the main piston cover 38 of main valve body 36 inner chambers, the oil inlet passage of the oil inlet hole institute warp of the cylinder base of cylinder be located at the passage 362 that main piston overlaps 38 inner chambers and be communicated with, the external oil transport pipeline in the passage 362 that main piston overlaps 38 inner chambers and main valve seat 311 bottoms of being located at main piston 37 and main valve body 36 belows is communicated with, and the oilhole 382 of main piston cover 38 is located at main piston and is overlapped below, 38 tops.Oil outlet B3 set on the cylinder wall between piston and the cylinder inner wall baffle plate is communicated with main valve body 36 inner chambers, and oilhole C3 set on the cylinder wall below the cylinder internal baffle 3110 is communicated with main piston cover oilhole 382.The breather line 322 of sealing nut vent 3113 in tracheae 321 and joint valve base 32 is communicated with source of the gas inlet hole M3.
In Fig. 3, main piston spring 39 is enclosed within main piston spring seat 372 and main piston overlaps between the 38 internal surface spring seats 381.
Claims (4)
1, a kind of valve of underground well for controlling gas is characterized in that being provided with
Joint valve, joint valve is provided with joint valve body, joint valve base, guide piston, guide piston spring and guide piston spring seat, the ground well joint of the external pipeline refuelling truck in the top of joint valve body, the bottom of joint valve body is connected with the joint valve base, guide piston is located in the joint valve body, the piston rod of guide piston inserts in the guide piston spring seat, the guide piston spring seat is fixedly arranged on joint valve base upper surface center, and the guide piston spring housing is outside the piston rod and guide piston spring seat of guide piston;
Main valve, main valve is provided with main valve body, main valve seat, main piston, main piston cover and main piston spring, main valve body is located on the main valve seat, main piston is located at the main valve body inner chamber, the piston area of main piston is arranged at the fuel inlet of main valve seat bottom, and the main piston cover is enclosed within on the main piston, and the main piston spring is placed vertically between the spring seat of main piston piston area inboard and main piston cover internal surface spring seat, the piston area center of main piston is provided with fuel check valve, and main piston cover top side wall is provided with oilhole;
Pneumatic valve, Pneumatic valve is provided with cylinder, piston, connecting rod, spring, spring setting sleeve and sealing nut, piston is located at the top in the cylinder, the top of connecting rod is connected with the bottom of piston, the middle part of connecting rod is taper, the bottom of connecting rod is connected with the upper surface of spring setting sleeve, the spring setting sleeve is provided with oilhole, tapering peripheral position corresponding cylinder inwall at the connecting rod middle part is provided with baffle plate, the tapering kiss at the mesopore of baffle plate and connecting rod middle part connects, on cylinder bottom, establish the spring locating slot, the oil inlet hole of cylinder block bottom is communicated with through the external oil transport pipeline of oil inlet passage and main valve seat, in the import of oil inlet passage, establish filter screen, spring is located between spring setting sleeve and the spring locating slot, on the cylinder wall between piston and the cylinder inner wall baffle plate, be provided with oil outlet, oil outlet is communicated with the main valve body inner chamber, on the cylinder wall below the cylinder internal baffle, be provided with and be used for overlapping the oilhole that oilhole is communicated with main piston, sealing nut is located at cylinder head, sealing nut is established vent, the breather line of vent in tracheae and joint valve base, external source of the gas inlet hole, said source of the gas is meant the source of the gas that is used to control Pneumatic valve, the external pipeline refuelling truck of source of the gas inlet hole ground well joint;
The pressure unit valve, the pressure unit valve is located at the top of the guide piston of joint valve.
2, a kind of valve of underground well for controlling gas as claimed in claim 1, it is characterized in that said Pneumatic valve is located on the main valve body madial wall of main piston cover oilhole side, the oil inlet hole of cylinder block bottom is through oil inlet passage and be located at the intraparietal channel connection of main valve, the external oil transport pipeline of the intraparietal passage of main valve and main valve seat is communicated with, main piston cover oilhole is located at main piston cover top sidewall, establishes filter screen in the import of the intraparietal passage of main valve.
3, a kind of valve of underground well for controlling gas as claimed in claim 1, it is characterized in that said Pneumatic valve is located at the main piston of main valve body inner chamber and puts, the oil inlet passage of the oil inlet hole institute warp of cylinder block bottom and the channel connection of being located at main piston cover inner chamber, passage external oil transport pipeline bottom main valve body of main piston cover inner chamber is communicated with, and main piston cover oilhole is located at below, main piston cover top.
4, a kind of valve of underground well for controlling gas as claimed in claim 1, it is characterized in that said sealing nut vent is arranged in the inlet hole of joint valve base lower surface, the inlet hole by the joint valve base lower surface in the joint valve base extends the source of the gas inlet hole of breather line to the joint valve base upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100658981A CN100343122C (en) | 2005-04-22 | 2005-04-22 | Valve of underground well for controlling gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100658981A CN100343122C (en) | 2005-04-22 | 2005-04-22 | Valve of underground well for controlling gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1687620A true CN1687620A (en) | 2005-10-26 |
| CN100343122C CN100343122C (en) | 2007-10-17 |
Family
ID=35305662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100658981A Expired - Fee Related CN100343122C (en) | 2005-04-22 | 2005-04-22 | Valve of underground well for controlling gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100343122C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109176970A (en) * | 2018-08-29 | 2019-01-11 | 单春艳 | A kind of refuse disposal installation |
| CN109581535A (en) * | 2018-12-06 | 2019-04-05 | 国网辽宁省电力有限公司锦州供电公司 | Power transformer pump type oil bolt detection method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4078577A (en) * | 1973-03-26 | 1978-03-14 | International Telephone And Telegraph Corporation | Pressure control valve and coupling |
| CN2043697U (en) * | 1988-10-11 | 1989-08-30 | 航空工业部第六○九研究所 | Valve for controlling liquid |
| US5150730A (en) * | 1992-03-02 | 1992-09-29 | Texaco, Inc. | Provisional protective means for pit valve casing |
| US5775101A (en) * | 1997-08-08 | 1998-07-07 | Beta Fluid Systems, L.L.C. | Refueling device with feedback-controlled auxiliary drive |
| CN2789514Y (en) * | 2005-04-22 | 2006-06-21 | 程伟强 | Manhole valve |
-
2005
- 2005-04-22 CN CNB2005100658981A patent/CN100343122C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109176970A (en) * | 2018-08-29 | 2019-01-11 | 单春艳 | A kind of refuse disposal installation |
| CN109176970B (en) * | 2018-08-29 | 2020-10-16 | 新昌县铎瞿环保科技有限公司 | Garbage disposal device |
| CN109581535A (en) * | 2018-12-06 | 2019-04-05 | 国网辽宁省电力有限公司锦州供电公司 | Power transformer pump type oil bolt detection method |
| CN109581535B (en) * | 2018-12-06 | 2020-07-07 | 国网辽宁省电力有限公司锦州供电公司 | Pump type oil plug detection method for power transformer |
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| Publication number | Publication date |
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| CN100343122C (en) | 2007-10-17 |
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