CN101818624A - Automatic hydraulic safe protection loop for open hydraulic power tongs - Google Patents
Automatic hydraulic safe protection loop for open hydraulic power tongs Download PDFInfo
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- CN101818624A CN101818624A CN200910126125A CN200910126125A CN101818624A CN 101818624 A CN101818624 A CN 101818624A CN 200910126125 A CN200910126125 A CN 200910126125A CN 200910126125 A CN200910126125 A CN 200910126125A CN 101818624 A CN101818624 A CN 101818624A
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- hydraulic
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- power tongs
- valve
- open
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Abstract
The invention discloses an automatic hydraulic safe protection loop for open hydraulic power tongs. The protection loop 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 power tongs, only mechanical linkage protection and pneumatic linkage protection are designed between the safety door and the power tongs, but hydraulic linkage protection is not designed. The invention provides the automatic hydraulic safe protection loop for the open hydraulic power tongs. The manual reversing valve is connected with the hydraulic motor to form a hydraulic power tong working loop; and the carrier-rod two-position three-way reversing valve is connected with the double pilot-controlled one-way valve to form a hydraulic control loop. The protection loop has the advantages of simple structure, great improvement on safety and remarkable economic benefit and social benefit because the control loop is added in the working loop of the open hydraulic power tongs.
Description
Technical field
The present invention relates to oil drilling and well workover automatic hydraulic safe protection with the security protection, particularly open hydraulic power tongs of Power Tong.It belongs to oilfield machinery resist 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.Also reduce the intensity of Power Tong itself, can produce shedding deformation during work.The binding clip of open-type Power Tong is an opening; when work, rotate at high speed; the operator can make health or other object touch opening in maloperation or when careless; make operator's health injury occur easily and 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.Can accomplish that preferably safety door does not shut, Power Tong is forbidden running, 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, the problem that Power Tong can not turn round when fundamentally not solving safety door and not shutting.The employing that also has automatic protection, be 200520124754.4 linked protection formula hydraulic power tongs as the patent No., be the mechanical type linked protection, protective door often clashes into, and damages easily, the fault rate of brake line is also high.The drill pipe tong safety door of the patent No. 200420109240.7 and for example, what it adopted is the interlock of protective door and air clutch, be pneumatic linked protection, 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; Power Tong can not turn round; simultaneously also can reinforced cut-out intensity, reduce shedding deformation, the invention provides a kind of automatic hydraulic safe protection loop 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.Hand-operated direction valve and hydraulic motor constitute hydraulic power tongs work loop, and 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.The post rod type two position three way directional control valve is installed on safety door or the Power Tong caliper, the double hydraulic control one way valve is set up between hand-operated direction valve and the hydraulic motor, by the switching of post rod type two position three way directional control valve control double hydraulic control one way valve, thus the work loop between control hand-operated direction valve and the hydraulic motor.When safety door is closed, control oil process post rod type two position three way directional control valve to the double hydraulic control one way valve, the double hydraulic control one-way valve opens, the loop of working between hand-operated direction valve and the hydraulic motor is unimpeded, handle hand-operated direction valve, hydraulic motor just can turn round the Power Tong operate as normal; When safety door is not closed, control oil without the post rod type two position three way directional control valve to the double hydraulic control one way valve, direct oil sump tank, the double hydraulic control one way valve is closed, the loop is obstructed between hand-operated direction valve and the hydraulic motor, hydraulic motor does not rotate.Realized that safety door is not related to, the work loop is obstructed, and Power Tong can not turn round.It is characterized in that: 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.
The invention has the beneficial effects as follows provides a kind of automatic hydraulic safe protection loop for open hydraulic power tongs; in the work loop of open hydraulic power tongs, increase a control loop, 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 accompanying drawing.
Fig. 1 is a hydraulic circuit diagram of the present invention.
Fig. 2 is the hydraulic circuit diagram when safety door is closed.
Fig. 3 closes when safety door, the hydraulic circuit diagram when handling hand-operated direction valve.
Fig. 4 is a profile schematic diagram of the present invention (front view).
Fig. 5 is a profile schematic diagram of the present invention (vertical view).
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.
The specific embodiment
In Fig. 1, the Power Tong automatic hydraulic safe protection loop is made up of work loop and control loop, and hand-operated direction valve 1, hydraulic motor 2 constitute the work loop; Post rod type two position three way directional control valve 4 and double hydraulic control one way valve 3 constitute control 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 work loop is obstructed.
In Fig. 2, 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 that is set on safety door 5 or the Power Tong caliper 6, the spool that promotes post rod type two position three way directional control valve 4 moves, 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 unimpeded to B2 to A2, hydraulic fluid port B1, hand-operated direction valve 1 is unobstructed to hydraulic motor 2 working oil path.
In Fig. 3, when safety door 5 is closed, 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, the formation loop;
In Fig. 4,5 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.
Claims (1)
1. automatic hydraulic safe protection loop for open hydraulic power tongs, be made up of safety door, hand-operated direction valve, hydraulic motor, double hydraulic control one way valve and post rod type two position three way directional control valve etc., it is characterized in that: 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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910126125A CN101818624A (en) | 2009-02-27 | 2009-02-27 | Automatic hydraulic safe protection loop for open hydraulic power tongs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910126125A CN101818624A (en) | 2009-02-27 | 2009-02-27 | Automatic hydraulic safe protection loop for open hydraulic power tongs |
Publications (1)
Publication Number | Publication Date |
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CN101818624A true CN101818624A (en) | 2010-09-01 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN200910126125A Pending CN101818624A (en) | 2009-02-27 | 2009-02-27 | Automatic hydraulic safe protection loop for open hydraulic power tongs |
Country Status (1)
Country | Link |
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CN (1) | CN101818624A (en) |
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2009
- 2009-02-27 CN CN200910126125A patent/CN101818624A/en active Pending
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PB01 | Publication | ||
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C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100901 |