CN1900571A - Hydraulic power clamp fastening protective valve - Google Patents
Hydraulic power clamp fastening protective valve Download PDFInfo
- Publication number
- CN1900571A CN1900571A CN 200510084035 CN200510084035A CN1900571A CN 1900571 A CN1900571 A CN 1900571A CN 200510084035 CN200510084035 CN 200510084035 CN 200510084035 A CN200510084035 A CN 200510084035A CN 1900571 A CN1900571 A CN 1900571A
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- valve pocket
- power clamp
- hydraulic power
- 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.)
- Pending
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
A valve pocket with cover is setup on side of valve body of the disclosed protective valve. Through oil ducts, up oil port and low oil port are connected to the valve pocket. A one-way valve is installed at inlet mouth of one oil duct. When power clamp tightens screw of pipe, if oil pressure reaches a setting value (the setting value is less than loose pressure value), then through oil duct inside valve, partial hydraulic oil at oil inlet mouth pushes one-way valve i.e. plug of cone valve, and inflows to oil outlet mouth through the valve pocket and oil return channel so as to play function of dividing pressure of overflow. The invention prevents screws and nuts from damage effectively
Description
Technical field
The present invention and a kind of valve that is installed on the hydraulic power plier.Be particularly related to and a kind ofly be used to tighten and unclamp valve on the hydraulic power plier of pipeline spiral.
Background technique
Usually adopt the mode that is threaded between the metal tubes of oil field, tighten and unclamp this spiral and is connected general employing hydraulic power plier.Existing hydraulic power plier charge oil pressure tight on the implementation and that unclamp oil motor when moving is consistent.Therefore there is following drawback in it, if the design charge oil pressure satisfies the requirement of unclamping the pipeline spiral, this pressure is bigger than normal when tightening, and is very easy to damage the screw and the nut of pipeline.And if for fear of this damage oil pressure is reduced, then be difficult to unclamp spiral.
The model utility content
Technical problem to be solved by this invention provides a kind of new structure, but the hydraulic power clamp fastening protective valve of overflow dividing potential drop when tightly operating on the implementation is used to overcome the deficiency of above-mentioned existing procucts.
In order to address the above problem, the present invention has adopted following technological scheme.
A kind of hydraulic power clamp fastening protective valve; comprise valve body and the top hydraulic fluid port, the bottom hydraulic fluid port that are opened on the valve body; its specialization is: the side at valve body offers the valve pocket that has the valve pocket lid; top hydraulic fluid port and bottom hydraulic fluid port are communicated with this valve pocket by oil duct respectively, and the accent of going into of an oil duct is equipped with one-way valve therein.
Said one-way valve is that a mitre velve is stifled, between its rear end and the valve pocket lid spring is installed.
The valve pocket lid is the inner thread bush that screws in valve pocket inside, and is slidingly fitted with piston in this thread bush,
The rear end of described spring is installed in this piston.
In the piston rear end arranged outside adjustment bolt is arranged, it passes valve pocket and covers also screw-thread fit with it.
After adopting the technical program; when power tong tightens the pipeline spiral; when reaching setting value, oil pressure (unclamps the needed power of pipeline spiral greater than tightening power; so in the time of the force value of this setting value when unclamping); it is that mitre velve is stifled that the part hydraulic oil of filler opening backs down one-way valve by the oil duct in the valve; flow into oil outlet through valve pocket and back oil road, thereby play the effect of overflow dividing potential drop, effectively protect the screw of pipeline and nut not to be damaged.And when power tong unclamped the pipeline spiral, filler opening and oil outlet exchanged, and mitre velve blocks up stressed shutoff valve internal oil channel, guarantees that oil pressure is unaffected.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is that schematic representation is looked on the right side of the embodiment of the invention.
Embodiment
Further specify the present invention below in conjunction with embodiment.
As shown in Figure 1 and Figure 2, valve body 2 right sides of embodiments of the invention offer valve pocket 7, and the valve pocket lid 8 of valve pocket 7 is a thread bush, and this thread bush and valve body 2 screw-thread fit also are added with seal ring.Thread bush is deep in the part in the valve pocket 7 piston that slides in thread bush 11 is housed, and seal ring also is installed between piston 11 and the thread bush.Spring 12 is installed on the spring seat 13, and the rear end of spring 12 is installed in the piston 11, and to be that mitre velve is stifled be connected for spring seat 13 front ends and one-way valve 6.
Be communicated with by back oil road 4 between top hydraulic fluid port 3 and the valve pocket 7, be communicated with by vertically unloading oil duct 15 and laterally unloading oil duct 5 between bottom hydraulic fluid port 14 and the valve pocket 7.The front end shutoff that mitre velve blocks up is at the accent place of laterally unloading oil duct 5.
The present invention with four bolts by screw 1 be installed be fixed on the oil motor or the link of oil motor on, hydraulic fluid port both sides, upper and lower part correspondence respectively are connected on oil motor and the corresponding hydraulic fluid port of selector valve.When hydraulic power plier is implemented to tighten action; 14 oil-feeds of bottom hydraulic fluid port; when oil pressure reaches setup pressure value; hydraulic oil blocks up mitre velve and backs down; it is top hydraulic fluid port 3 that process valve pocket 7 and back oil road 4 flow into oil outlet; thereby play the effect of overflow dividing potential drop, restriction tightens power, and protection pipeline spiral is not damaged.And when unclamping oil return, filler opening and oil outlet exchange, i.e. top hydraulic fluid port 3 oil-feeds, and hydraulic oil enters valve pocket 7 from back oil road 4, and oil duct 5 is laterally unloaded in the stifled stressed shutoff of mitre velve, guarantees that oil pressure is unaffected.
Adjust bolt 9 and pass thread bush, front end withstands on the outside, piston 11 rear ends.Because adjusting bolt 9 is that spiral cooperates with thread bush, screw adjustment bolt 9 and can make it advance and retreat, in order to the length and the spring-back force of adjustment spring 12, that is hydraulic oil backs down the stifled force value of mitre velve.After adjusting to the right place, get final product with tightening nut 10 lockings.
Claims (4)
1, a kind of hydraulic power clamp fastening protective valve; comprise valve body (2) and be opened in top hydraulic fluid port (3), bottom hydraulic fluid port (14) on the valve body (2); it is characterized in that: the side at valve body (2) offers the valve pocket (7) that has valve pocket lid (8); top hydraulic fluid port (3) and bottom hydraulic fluid port (14) are communicated with this valve pocket (7) by oil duct respectively, and the accent of going into of an oil duct is equipped with one-way valve (6) therein.
2, hydraulic power clamp fastening protective valve as claimed in claim 1 is characterized in that: said one-way valve (6) is that a mitre velve is stifled, between its rear end and the valve pocket lid (8) spring (12) is installed.
3, hydraulic power clamp fastening protective valve as claimed in claim 2; it is characterized in that: valve pocket lid (8) is the inner inner thread bush of valve pocket (7) that screws in; and in this thread bush, being slidingly fitted with piston (11), the rear end of described spring (12) is installed in this piston (11).
4, hydraulic power clamp fastening protective valve as claimed in claim 3 is characterized in that: arranged outside has adjustment bolt (9) in piston (11) rear end, and it passes valve pocket lid (8) and screw-thread fit with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510084035 CN1900571A (en) | 2005-07-18 | 2005-07-18 | Hydraulic power clamp fastening protective valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510084035 CN1900571A (en) | 2005-07-18 | 2005-07-18 | Hydraulic power clamp fastening protective valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1900571A true CN1900571A (en) | 2007-01-24 |
Family
ID=37656513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510084035 Pending CN1900571A (en) | 2005-07-18 | 2005-07-18 | Hydraulic power clamp fastening protective valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1900571A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105127939A (en) * | 2015-08-11 | 2015-12-09 | 黑龙江大学 | Portable hydraulic pliers for crimping bead string joints |
-
2005
- 2005-07-18 CN CN 200510084035 patent/CN1900571A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105127939A (en) * | 2015-08-11 | 2015-12-09 | 黑龙江大学 | Portable hydraulic pliers for crimping bead string joints |
| CN105127939B (en) * | 2015-08-11 | 2017-01-25 | 黑龙江大学 | Portable hydraulic pliers for crimping bead string joints |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201496633U (en) | One-way overflow valve | |
| CN201351642Y (en) | Hydraulic oil tank with oil cooler | |
| CN201326826Y (en) | High-pressure multistage step-down cage balanced type angle valve | |
| CN1900571A (en) | Hydraulic power clamp fastening protective valve | |
| CN2804451Y (en) | Fastening protective vavle of hydraulic dynamic tongs | |
| CN2937754Y (en) | Valve device for connecting pipe under pressure | |
| CN205189996U (en) | Splashproof jettison gear of vehicle engine oil pan | |
| CN101852296A (en) | Water drain valve | |
| CN103398201B (en) | Y shape valve body screw thread connects high temperature and high pressure cut-off valve | |
| CN1812847A (en) | Pressure regulator | |
| CN200963808Y (en) | Valve converting tool | |
| CN206361220U (en) | The rotation cylinder black water regulating valve of anti-cavitation | |
| CN202074055U (en) | Three-section type two-way sealed high-pressure butterfly valve | |
| CN208252812U (en) | A kind of Pneumatic soft-sealing ball valve | |
| CN201836479U (en) | Safety relief device of metal two-way sealing valve cavity | |
| CN202007804U (en) | Throttle valve with pressure protection function | |
| CN2643103Y (en) | A oneway cut-off valve | |
| CN205013772U (en) | Nuclear safety level valves | |
| CN202402404U (en) | Radiator with built-in automatic pressure relief device | |
| CN2849351Y (en) | Straight-through stop throttle | |
| CN201953730U (en) | Hydraulic system | |
| CN204961872U (en) | Plate sluice valve | |
| CN205127491U (en) | Fast water cap of double fluid | |
| CN2859128Y (en) | Sandwich valve | |
| CN202972105U (en) | Self-filtering balance valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |