CN201747300U - Hydraulic control loop of power tongs - Google Patents
Hydraulic control loop of power tongs Download PDFInfo
- Publication number
- CN201747300U CN201747300U CN2010202861943U CN201020286194U CN201747300U CN 201747300 U CN201747300 U CN 201747300U CN 2010202861943 U CN2010202861943 U CN 2010202861943U CN 201020286194 U CN201020286194 U CN 201020286194U CN 201747300 U CN201747300 U CN 201747300U
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- CN
- China
- Prior art keywords
- hydraulic
- way
- oil
- directional control
- control valve
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a hydraulic control loop of power tongs, comprising a hydraulic motor, a double-acting hydraulic cylinder, a three-position four-way manual change valve and a three-position four-way hydraulic-controlled change valve, wherein the three-position four-way manual change valve and the three-position four-way hydraulic-controlled change valve are connected by an oil pipe, and the three-position four-way hydraulic-controlled change valve is connected with the hydraulic motor by the oil pipe. Two oil ports in the three-position four-way manual change valve are respectively communicated with a high-pressure hydraulic oil outlet and an oil tank inlet, and another two oil ports in the three-position four-way manual change valve are respectively communicated with the left cavity and the right cavity of the double-acting hydraulic cylinder by oil pipes. The hydraulic control loop can have full time to reliably clamp a back tong and then rotate a main tong, so the working reliability is good.
Description
Technical field
The utility model relates to a kind of hydraulic control circuit of the Power Tong that is applied to oil drilling and well workover, particularly a kind of Power Tong.
Background technology
The Power Tong that existing oil drilling and well workover are used unloads the common equipment of operation such as tubing string on being, general Power Tong divides main pincers and back-up tong according to need of work, and during work, back-up tong clamps box cupling or joint is motionless, main pincers clamp body or joint rotation, button or shackle operation in the realization.Power Tong is in when work, and back-up tong clamps synchronously along with main pincers or unclamps, the clamping of back-up tong or to unclamp be that driving mechanism by back-up tong is carried out.The driving mechanism of back-up tong contains double-act-ing hydraulic J-Horner, and the tooth bar plunger in the double-act-ing hydraulic J-Horner is left and right when mobile, and travelling gear drives the back-up tong binding clip and rotates, and realizes clamping or unclamping tubing string.Because available dynamic pincers back-up tong when work clamps synchronously with main pincers or unclamps, back-up tong usually occurring does not also have reliable grip, and main pincers are just opened and cheated rotation, therefore the poor reliability of work.
The utility model content
The technical problems to be solved in the utility model provides a kind of hydraulic control circuit of Power Tong, and this hydraulic control circuit can make back-up tong that the adequate time reliable grip is arranged, and then makes main pincers rotation, the therefore good reliability of work.
For solving the problems of the technologies described above, the hydraulic control circuit of a kind of Power Tong of the utility model, it contains hydraulic motor, double acting hydraulic cylinder, also contain the 3-position 4-way hand-operated direction valve, the 3-position 4-way pilot operated directional control valve, 3-position 4-way hand-operated direction valve and 3-position 4-way pilot operated directional control valve link by oil pipe, the 3-position 4-way pilot operated directional control valve links and hydraulic motor links by oil pipe, two hydraulic fluid ports in the 3-position 4-way hand-operated direction valve link with high-pressure and hydraulic oil outlet and fuel tank import respectively, and two hydraulic fluid ports in addition in the 3-position 4-way hand-operated direction valve link by the left chamber and the right chamber of oil pipe and described double acting hydraulic cylinder respectively.
Described 3-position 4-way pilot operated directional control valve is provided with the air damping hole, and the size in this air damping hole can be regulated.
In the hydraulic control circuit of above-mentioned Power Tong, when manipulation 3-position 4-way hand-operated direction valve makes its spool position be positioned at position, a left side, high-pressure and hydraulic oil then enters then from the one hydraulic fluid port and flows out from its another hydraulic fluid port, a high-pressure and hydraulic oil part that flows out flows in the right chamber of double acting hydraulic cylinder, another part flows into the left side control port of 3-position 4-way pilot operated directional control valve, because when entering high-pressure and hydraulic oil in the right chamber of double acting hydraulic cylinder and having only oil pressure to be elevated to certain pressure, be after double-act-ing hydraulic J-Horner drives travelling gear driving back-up tong binding clip rotation reliable grip, the hydraulic oil of inflow 3-position 4-way pilot operated directional control valve left side control port could promote the spool of 3-position 4-way pilot operated directional control valve and shift to the left side, meanwhile because of the air damping effect of 3-position 4-way pilot operated directional control valve, also make the spool of 3-position 4-way pilot operated directional control valve when mobile to the left, obtain time-delay, thereby guaranteed that further back-up tong has the adequate time reliable grip, after the left side is shifted in the spool time-delay of 3-position 4-way pilot operated directional control valve, the conducting of 3-position 4-way pilot operated directional control valve, hydraulic motor rotates, and drives main pincers rotation.This hydraulic control circuit can make back-up tong that the adequate time reliable grip is arranged in sum, and then makes main pincers rotation, the therefore good reliability of work.
Description of drawings
Fig. 1 is the schematic diagram of the hydraulic control circuit of a kind of Power Tong of the utility model.
1. 3-position 4-way hand-operated direction valves among the figure, 2. 3-position 4-way pilot operated directional control valve, 3. hydraulic motor, 4. double-act-ing hydraulic J-Horner.
The specific embodiment
Among Fig. 1, a kind of hydraulic control circuit of Power Tong contains hydraulic motor 3, double acting hydraulic cylinder 4, also contains 3-position 4-way hand-operated direction valve 1,3-position 4-way pilot operated directional control valve 2.3-position 4-way hand-operated direction valve 1 links with 3-position 4-way pilot operated directional control valve 2, and 3-position 4-way pilot operated directional control valve 2 links and hydraulic motor 3 links.Hydraulic fluid port P in the 3-position 4-way hand-operated direction valve 1 and hydraulic fluid port O link with high-pressure and hydraulic oil outlet and fuel tank import respectively.Hydraulic fluid port A in the 3-position 4-way hand-operated direction valve 1 and hydraulic fluid port B the hydraulic fluid port N in the right chamber by oil pipe and double acting hydraulic cylinder 4 and the hydraulic fluid port M in right chamber respectively link.Be the convenient spool traveling time of regulating 3-position 4-way pilot operated directional control valve 2,3-position 4-way pilot operated directional control valve 2 is provided with the air damping hole, and the size in this air damping hole can be regulated, and promptly can regulate between time-delay.In the hydraulic control circuit of above-mentioned Power Tong, when manipulation 3-position 4-way hand-operated direction valve 1 makes its spool be positioned at position, a left side, high-pressure and hydraulic oil then enters then from its hydraulic fluid port P and flows out from hydraulic fluid port A, a high-pressure and hydraulic oil part that flows out is in hydraulic fluid port N flows into the right chamber of double acting hydraulic cylinder 4, another part flows into the left control port of 3-position 4-way pilot operated directional control valve 2, because when entering high-pressure and hydraulic oil in the double acting hydraulic cylinder 4 right chambeies and having only oil pressure to be elevated to certain pressure, be after double-act-ing hydraulic J-Horner 4 drives travelling gear driving back-up tong binding clip rotation reliable grip, the hydraulic oil of inflow 3-position 4-way pilot operated directional control valve 2 left control ports could promote the spool of 3-position 4-way pilot operated directional control valve 2 and shift to the left side, meanwhile because of the air damping effect of 3-position 4-way pilot operated directional control valve 2, also make the spool of 3-position 4-way pilot operated directional control valve 2 when mobile to the left, obtain time-delay, thereby guaranteed that further back-up tong has the adequate time reliable grip, after the left side is shifted in spool 2 time-delays of 3-position 4-way pilot operated directional control valve, 2 conductings of 3-position 4-way pilot operated directional control valve, hydraulic motor 3 rotates, and drives main pincers rotation.This hydraulic control circuit can make back-up tong that the adequate time reliable grip is arranged in sum, and then makes main pincers rotation, the therefore good reliability of work.
Claims (2)
1. the hydraulic control circuit of a Power Tong, it contains hydraulic motor, double acting hydraulic cylinder, it is characterized in that: also contain the 3-position 4-way hand-operated direction valve, the 3-position 4-way pilot operated directional control valve, 3-position 4-way hand-operated direction valve and 3-position 4-way pilot operated directional control valve link by oil pipe, the 3-position 4-way pilot operated directional control valve links and hydraulic motor links by oil pipe, two hydraulic fluid ports in the 3-position 4-way hand-operated direction valve link with high-pressure and hydraulic oil outlet and fuel tank import respectively, and two hydraulic fluid ports in addition in the 3-position 4-way hand-operated direction valve link by the left chamber and the right chamber of oil pipe and described double acting hydraulic cylinder respectively.
2. the hydraulic control circuit of a kind of Power Tong according to claim 1, it is characterized in that: described 3-position 4-way pilot operated directional control valve is provided with the air damping hole, and the size in this air damping hole can be regulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202861943U CN201747300U (en) | 2010-08-10 | 2010-08-10 | Hydraulic control loop of power tongs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202861943U CN201747300U (en) | 2010-08-10 | 2010-08-10 | Hydraulic control loop of power tongs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201747300U true CN201747300U (en) | 2011-02-16 |
Family
ID=43581983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202861943U Expired - Lifetime CN201747300U (en) | 2010-08-10 | 2010-08-10 | Hydraulic control loop of power tongs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201747300U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003214A (en) * | 2015-07-28 | 2015-10-28 | 四川宏华石油设备有限公司 | Automatic centering device for main tong |
| CN110952938A (en) * | 2019-11-22 | 2020-04-03 | 濮阳市宝利通石油机械有限公司 | Automatic hydraulic power combination tongs |
-
2010
- 2010-08-10 CN CN2010202861943U patent/CN201747300U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003214A (en) * | 2015-07-28 | 2015-10-28 | 四川宏华石油设备有限公司 | Automatic centering device for main tong |
| CN110952938A (en) * | 2019-11-22 | 2020-04-03 | 濮阳市宝利通石油机械有限公司 | Automatic hydraulic power combination tongs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110216 |