CN101818625A - Automatic safety door protection device for open hydraulic power tongs - Google Patents
Automatic safety door protection device for open hydraulic power tongs Download PDFInfo
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- CN101818625A CN101818625A CN200910126126A CN200910126126A CN101818625A CN 101818625 A CN101818625 A CN 101818625A CN 200910126126 A CN200910126126 A CN 200910126126A CN 200910126126 A CN200910126126 A CN 200910126126A CN 101818625 A CN101818625 A CN 101818625A
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- safety door
- protection device
- power tongs
- valve
- hydraulic
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Abstract
The invention discloses an automatic safety door protection device for open hydraulic power tongs. The protection device comprises a safety door, a power tongs body, a hydraulic motor, a manual reversing valve, a carrier-rod two-position three-way reversing valve, a double pilot-controlled one-way valve and the like. In the conventional open hydraulic power tongs, only a mechanical protection device or a pneumatic protection device adopts the automatic safety door protection device, and limitation is inevitable. Parts of the mechanical protection device are easy to damage and objects cannot be prevented from entering an opening due to the absence of an entire safety door during the rotation of the power tongs; and the pneumatic protection device can only be applied to pneumatically-driven or hydraulically and pneumatically-driven power tongs with an air tube clutch. The invention provides the automatic safety door protection device for the open hydraulic power tongs. The safety door or the power tongs body is provided with the carrier-rod two-position three-way reversing valve. The double pilot-controlled one-way valve is arranged between the manual reversing valve and the hydraulic motor. The opening or closing of the safety door controls the reversing of the carrier-rod two-position three-way reversing valve. Only one protection device is arranged in the safety door and the working loop of the open hydraulic power tongs, so that the protection device has the advantages of simple structure, great improvement on safety and remarkable economic benefit and social benefit.
Description
Technical field
The present invention relates to oil drilling and well workover safe automatic safety device with the security protection facility, particularly open hydraulic power tongs of Power Tong.It belongs to oilfield machinery security protection technology field.
Background technology
At present, oil drilling and well workover Power Tong are the common equipments that unloads drilling rod, sleeve pipe and oil pipe operation on the oil field, be divided into open-type, closed type and survivor of a murder attempt's type by the binding clip pattern, because binding clip is an opening, when operation each time, can withdraw well head easily, so the open-type Power Tong also is a kind of of the most normal employing.Simultaneously also because be hatch frame, to using and keeping in repair and brought very big potential safety hazard.Can produce shedding deformation when working in addition, reduce the intensity of Power Tong itself.The binding clip of open-type Power Tong is an opening, the time rotates at high speed in work, and the operator can make health or other object touch opening in maloperation or when careless, makes operator's health injury occur easily, has also damaged Power Tong itself.Therefore the open-type Power Tong that uses at the scene requires all safety guard---safety door to be arranged, and prevents that operator's health or other object from entering the Power Tong opening.Accomplish that preferably safety door does not shut, Power Tong can not turn round, and also can strengthen the intensity of opening simultaneously, reduces shedding deformation.The open-type Power Tong that uses has at the scene passed through repeatedly and has improved at present; the general safety door safety guard that adopts only is to prevent that operator's health and other object from entering opening, and Power Tong is not forbidden the problem that turns round when fundamentally solving safety door and not shutting.The employing automatic safety device that also has; it as the patent No. " linked protection formula hydraulic power tongs " patent of 200520124754.4; between protective door and reversing arrangement, brake line is installed; be exactly that tubing string enters into the Power Tong opening, drive the line between protective door and the hand reversing gears, the locking of having removed the hand reversing gears mandrel is spacing; carry out the switch operation of hydraulic circuit; accomplish that protective door is not related to, Power Tong can not turn round, and has avoided potential safety hazard.But also there is following problem in the reality use: 1, do not have whole safety door, can not prevent that object from entering opening when Power Tong turns round; 2, opening strength is not strengthened; What 3, adopt is mechanical type linked protection device, is not the fluid pressure linkage protector, and protective door often clashes into, and damages easily, and the fault rate of brake line is also high." drill pipe tong safety door " patent of the patent No. 200420109240.7 and for example, have bearing pin connect protective door doorframe and air clutch gas source switch rotary valve, realized to rotate when the Power Tong protective door is not shut, also prevented the defective of Power Tong stress deformation, what but it adopted is the interlock that realizes protective door and air clutch, can only be applied on the pneumatic or liquid of air clutch, the Power Tong that gas is united driving, can not be applied in hydraulic power tongs.
Summary of the invention
In order to solve present the deficiencies in the prior art, realize that safety door does not shut, the hydraulic loop is obstructed, and hydraulic power tongs can not turn round; Reinforced cut-out intensity reduces shedding deformation, the invention provides a kind of automatic safety door protection device for open hydraulic power tongs.
Technical solution of the present invention is made up of safety door, Power Tong caliper, hydraulic motor, hand-operated direction valve, post rod type two position three way directional control valve, double hydraulic control one way valve etc.But safety door is folding, is installed on the Power Tong caliper, and the post rod type two position three way directional control valve is installed on safety door or the Power Tong caliper, and the double hydraulic control one way valve is built up between hydraulic motor and the hand-operated direction valve.Hand-operated direction valve links to each other with hydraulic motor and constitutes hydraulic power tongs work loop; The post rod type two position three way directional control valve links to each other with the double hydraulic control one way valve and constitutes hydraulic control circuit.It is characterized in that: on safety door or Power Tong caliper, be provided with the post rod type two position three way directional control valve.Between hand-operated direction valve and hydraulic motor, be provided with the double hydraulic control one way valve.The commutation that opens or closes control post rod type two position three way directional control valve of safety door.
The invention has the beneficial effects as follows in the safety door of open hydraulic power tongs and the loop of working increases a protective device, and simple in structure, safety is greatly improved, economic benefit and obvious social benefit.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a hydraulic circuit diagram of the present invention.
Fig. 2 is a profile schematic diagram of the present invention (front view).
Fig. 3 is a profile schematic diagram of the present invention (vertical view).
Fig. 4 is the sectional drawing of post rod type two position three way directional control valve.
Fig. 5 is the I--I sectional view of Fig. 4.
Fig. 6 is the sectional drawing of double hydraulic control one way valve.
Among the figure: 1. hand-operated direction valve, 2. hydraulic motor, 3. double hydraulic control one way valve, 4. post rod type two position three way directional control valve, 5. safety door, 6. Power Tong caliper, 7. hydraulic line, 8. push rod, 9. two position three way directional control valve valve body, 10. back-moving spring, 11. double hydraulic control one way valve valve body, 12. unidirectional valve seats, 13. piston mandrils, 14. the one way valve back-moving spring, 15. nonreturn valve cores.
The specific embodiment
In Fig. 1, the Power Tong hydraulic circuit is by hand-operated direction valve 1, hydraulic motor 2, double hydraulic control one way valve 3, post rod type two position three way directional control valve 4 is formed, hand-operated direction valve 1, hydraulic motor 2 constitutes the work loop, double hydraulic control one way valve 3 and post rod type two position three way directional control valve 4 constitute control oil channel, when safety door 5 is closed, contact S on the post rod type two position three way directional control valve 4 runs into the contact of setting on safety door 5 or the Power Tong caliper 6, control oil from hydraulic fluid port P1 to hydraulic fluid port X again to X1, open double hydraulic control one way valve 3, make on the double hydraulic control one way valve 3 hydraulic fluid port A1 to A2, hydraulic fluid port B1 is unimpeded to B2, handle hand-operated direction valve 1, pressure oil from hydraulic fluid port P through hydraulic fluid port A to hydraulic fluid port B again to oil return inlet T, or through hydraulic fluid port B to hydraulic fluid port A to oil return inlet T, form the loop; When safety door 5 did not close, the contact S on the post rod type two position three way directional control valve 4 did not run into the contact of setting, control oil from hydraulic fluid port P1 to hydraulic fluid port Y directly to oil return inlet T, double hydraulic control one way valve 3 is closed, the loop is obstructed.
In Fig. 2,3 illustrated embodiments, safety door 5 is installed on the Power Tong caliper 6, post rod type two position three way directional control valve 4 is installed on safety door 5 or the Power Tong caliper 6, and double hydraulic control one way valve 3 is built up between hand-operated direction valve 1 and the hydraulic motor 2, links to each other by hydraulic line 7 each other.
In Fig. 4,5 illustrated embodiments, when safety door is not closed, contact S does not run into the contact of setting, and push rod 8 is motionless, and control oil channel is logical from hydraulic fluid port P1 to hydraulic fluid port Y, and control oil is oil sump tank directly; When safety door was closed, contact S ran into the contact of setting, and push rod 8 moves to right, and control oil channel is logical from hydraulic fluid port P1 to hydraulic fluid port X; When opening safety door, push rod 8 moves to left under back-moving spring 10 effects, and control oil channel is logical from hydraulic fluid port P1 to hydraulic fluid port X.
In the embodiment shown in fig. 6, when control port X1 did not have pressure oil, piston mandril 13 and nonreturn valve core 15 kept motionless under 14 effects of one way valve back-moving spring, and hydraulic fluid port A1 is obstructed to B2 to A2, B1; When control port X1 had pressure oil, piston mandril 13 promoted nonreturn valve core 15 and moves down, and hydraulic fluid port A1 is logical to A2, B1 to B2.
Claims (3)
1. automatic safety door protection device for open hydraulic power tongs; form by safety door, Power Tong caliper, hand-operated direction valve, hydraulic motor, double hydraulic control one way valve and post rod type two position three way directional control valve, it is characterized in that: on safety door or Power Tong caliper, be provided with the post rod type two position three way directional control valve.
2. a kind of automatic safety door protection device for open hydraulic power tongs according to claim 1 is characterized in that: be provided with the double hydraulic control one way valve between hand-operated direction valve and hydraulic motor.
3. a kind of automatic safety door protection device for open hydraulic power tongs according to claim 1, its feature also is: the commutation that opens or closes control post rod type two position three way directional control valve of safety door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910126126A CN101818625A (en) | 2009-02-27 | 2009-02-27 | Automatic safety door protection device for open hydraulic power tongs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910126126A CN101818625A (en) | 2009-02-27 | 2009-02-27 | Automatic safety door protection device for open hydraulic power tongs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101818625A true CN101818625A (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910126126A Pending CN101818625A (en) | 2009-02-27 | 2009-02-27 | Automatic safety door protection device for open hydraulic power tongs |
Country Status (1)
| Country | Link |
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| CN (1) | CN101818625A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422023A (en) * | 2015-12-08 | 2016-03-23 | 盐城特达钻采设备有限公司 | Opening type hydraulic power tongs capable of being remotely and hydraulically controlled |
| CN106194069A (en) * | 2016-08-27 | 2016-12-07 | 刘雷 | A kind of energy-saving electric method of intelligent hydraulic pincers |
-
2009
- 2009-02-27 CN CN200910126126A patent/CN101818625A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422023A (en) * | 2015-12-08 | 2016-03-23 | 盐城特达钻采设备有限公司 | Opening type hydraulic power tongs capable of being remotely and hydraulically controlled |
| CN106194069A (en) * | 2016-08-27 | 2016-12-07 | 刘雷 | A kind of energy-saving electric method of intelligent hydraulic pincers |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100901 |