CN2307162Y - Non-adjusting relief valve - Google Patents
Non-adjusting relief valve Download PDFInfo
- Publication number
- CN2307162Y CN2307162Y CN 97205366 CN97205366U CN2307162Y CN 2307162 Y CN2307162 Y CN 2307162Y CN 97205366 CN97205366 CN 97205366 CN 97205366 U CN97205366 U CN 97205366U CN 2307162 Y CN2307162 Y CN 2307162Y
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- CN
- China
- Prior art keywords
- valve
- hydraulic
- relief valve
- pressure
- channel
- 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 - Fee Related
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Abstract
The utility model discloses a non-adjusting relief valve which is suitable for hydraulic pliers for petroleum pipes or other hydraulic machines in the petroleum industry. The non-adjusting relief valve is composed of a needle valve and a main valve. The valve body of the main valve is additionally provided with a channel B inside. The stub ends of a channel A and the channel B are respectively communicated with the inlet port and the outlet port of the hydraulic pliers for petroleum pipes or a hydraulic machine. The small ends of the channel A and the channel B are respectively communicated with the back inlet port and the back outlet port of the hydraulic pliers for petroleum pipes and the hydraulic machine. The non-adjusting relief valve is directly installed between the reversal valves of the hydraulic pliers for petroleum pipes. The non-adjusting relief valve realizes that different working pressure of one machine is automatically converted under different working conditions, can avoid high pressure work under a low pressure condition because of untimely pressure regulation, and has the functions of protecting a hydraulic system and referred equipment.
Description
The utility model relates to hydraulic machinery and hydraulic control field, particularly a kind ofly exempts to transfer relief valve, is applicable in the hydraulic machinery that needs different pressures control in the various hydraulic tubing tongs of petroleum industry operation field and other industry.
The petroleum industry operation field exists at present, and the relief valve that uses on the hydraulic tubing tong is adjustable relief valve.Be installed on the hydraulic system oil feeding line control system working pressure.When same machinery needs different operating pressure under the different operating state, then to realize by adjust system relief valve at any time.Thereby cause the fluctuation of working pressure, shortened the working life of system's relief valve simultaneously.More seriously when hydraulic machinery needed operating on low voltage, relief valve mistuning joint or not adjusting in time caused high-pressure work to cause hydraulic machinery and workpiece to damage or descend to working life.
The utility model is for solving under the same mechanical different operating state, and the automatic transformation of different operating pressure designs.Finally reaching same machinery working pressure under the different operating state changes automatically, guarantee that working pressure is stable under the equal state, improve mechanical property and working efficiency, prolong hydraulic machinery and relate to life-span of equipment, reduce excessive working pressure deviation and economic loss that personal factor caused.
For reaching above-mentioned purpose, the utility model has increased channel B in main valve body, make main valve body possess three-passage A, B and overflow ducts C, A is communicated with the inlet/outlet of hydraulic tubing tong or hydraulic control machinery respectively with the stub end of B, and A goes out respectively with behind hydraulic tubing tong selector valve or the hydraulic control mechanical commutation valve with microcephaly's end of B passage, import is communicated with.
That uses that the technical program provides exempts to transfer relief valve, makes the hydraulic tubing tong selector valve to having formed new level pressure overflow system between the hydraulic machinery, has realized the automatic transformation of hydraulic machinery working pressure under the different operating state, satisfies the needs that different operating is pressed.As using on the hydraulic tubing tong, can realize button, high pressure shackle on the low pressure, initiatively prevent to detain because of untimely adjustment pressure causes on the high pressure, damage pipe bar and hydraulic machinery, reach protection down-hole facility, the purpose that prolongs hydraulic system and relate to life of equipment.
Accompanying drawing is a structural representation of the present utility model.
Below in conjunction with embodiment the utility model is done further detailed description: referring to accompanying drawing, originally exempt to transfer relief valve in main valve body 7, to increase channel B, adopt A, B passage and overflow ducts C.Wherein the stub end of A, B is communicated with the inlet/outlet of hydraulic tubing tong or hydraulic control machinery respectively.Go out behind the little head end of A, B passage and the hydraulic tubing tong selector valve, import is communicated with.Overflow ducts C changes trend between main valve body 7 inherent A, B passage, and from the main valve body 7 of A, B passage microcephaly end face pass-out, be communicated with the preceding return flow line of hydraulic tubing tong selector valve.Originally exempt to transfer the pressure-regulating device of the aciculiform pressure regulator valve 6 in the relief valve to be made up of by cap 3, the blue pressure cap 4 of leather and leather blue 5 valve gap 1, screw press 2, locking, screw press 2 usefulness are threaded in the blue pressure cap 4 of leather, and removing from office above the blue pressure cap 4 is to lock by cap 3 and valve gap 1.Screw press 2 is the in-line screw rod, and valve gap 1 is a cored screw.Locking is outer odd number square nut by cap 3, and valve gap 1 is an outer odd number side screw.During pressure regulation, with given odd number square socket, valve gap 1 is taken off in counter-rotating, unclamps locking by cap 3 with the sleeve counter-rotating earlier, with the center hole rotation pressure regulation bar 2 of Flathead screwdriver by the odd number square socket, carries out pressure regulation again.The examination situation needs, and behind pressure setting, is just changeing the odd number square socket, will lock by cap 3 and lock, and screws valve gap 1.When hydraulic tubing tong or hydraulic machinery were in the operating on low voltage state, this valve A channel was a high-pressure channel, and B is a low-pressure channel.By hydraulic tubing tong selector valve oil sump tank, when the pressure in the passage A is set up oil pressure relief above this valve, originally exempt to transfer main valve and the needle-valve 5 automatic work in the relief valve and pass through channel C overflow step-down.Because C is communicated with the preceding return flow line of hydraulic tubing tong selector valve, then the direct oil sump tank of oil overflow is realized low pressurized overflow.When hydraulic tubing tong or hydraulic machinery were in the high-pressure work state, originally exempting to transfer relief valve B was high-pressure channel, and A is a low-pressure channel.Hydraulic oil in the A is by the low-pressure channel oil sump tank of hydraulic tubing tong selector valve.Therefore, use originally exempt to transfer relief valve after, when hydraulic tubing tong or hydraulic machinery are in high pressure conditions, do not work, the oil pressure relief of this moment is a system works pressure.
Claims (5)
1, a kind of be used for hydraulic machinery exempt to transfer relief valve, comprise needle-valve (6) and main valve (7), it is characterized in that in main valve body (7), having increased channel B, passage A is communicated with the inlet/outlet of hydraulic machinery or hydraulic control machinery respectively with the stub end of B, and A goes out respectively with behind hydraulic tubing tong or the hydraulic control mechanical commutation valve with microcephaly's end of B passage, import is communicated with.
2, according to claim 1ly exempt to transfer relief valve, it is characterized in that overflow ducts C changes trend and goes up pass-out from the main valve body (7) of A, B passage microcephaly end face in main valve body (7) and between the A, B passage.
3, according to claim 1ly exempt to transfer relief valve, the pressure-regulating device that it is characterized in that aciculiform pressure regulator valve (6) by valve gap (1), screw press (2), locking by cap (3), remove from office blue pressure cap (4) and leather orchid (5) is formed, screw press (2) is in leather orchid (4), and leather blue (4) is top for locking by cap (3) and valve gap (1).
4, according to claim 1ly exempt to transfer relief valve, it is characterized in that screw press (2) is the in-line screw rod, valve gap (1) is a cored screw.
5, according to claim 1ly exempt to transfer relief valve, it is characterized in that locking is outer odd number square nut by cap (3), valve gap (1) is an outer odd number side screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97205366 CN2307162Y (en) | 1997-06-01 | 1997-06-01 | Non-adjusting relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97205366 CN2307162Y (en) | 1997-06-01 | 1997-06-01 | Non-adjusting relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2307162Y true CN2307162Y (en) | 1999-02-10 |
Family
ID=33925607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97205366 Expired - Fee Related CN2307162Y (en) | 1997-06-01 | 1997-06-01 | Non-adjusting relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2307162Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111098540A (en) * | 2018-10-25 | 2020-05-05 | 沃恩阿克斯公开股份有限公司 | Press for pressing workpieces |
-
1997
- 1997-06-01 CN CN 97205366 patent/CN2307162Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111098540A (en) * | 2018-10-25 | 2020-05-05 | 沃恩阿克斯公开股份有限公司 | Press for pressing workpieces |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |