CN204921542U - All -hydraulic overload protection valve piece - Google Patents
All -hydraulic overload protection valve piece Download PDFInfo
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- CN204921542U CN204921542U CN201520657465.4U CN201520657465U CN204921542U CN 204921542 U CN204921542 U CN 204921542U CN 201520657465 U CN201520657465 U CN 201520657465U CN 204921542 U CN204921542 U CN 204921542U
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Abstract
The utility model provides an all -hydraulic overload protection valve piece, including first liquid accuse two -position three way switching -over valve, second liquid accuse two -position three way switching -over valve, sequence valve, two -position three way magenetic exchange valve, first hydraulic fluid port, second hydraulic fluid port, third hydraulic fluid port and fourth hydraulic fluid port, the oil inlet hole connection of first hydraulic fluid port and first liquid accuse two -position three way switching -over valve, the oil inlet hole connection of second hydraulic fluid port and second liquid accuse two -position three way switching -over valve, the sequence valve is connected with the forced induction end, the oil -out of sequence valve is connected with two -position three way magenetic exchange valve's second oil inlet, and two -position three way magenetic exchange valve's the oil -out and the liquid accuse end of first liquid accuse two -position three way switching -over valve and second liquid accuse two -position three way switching -over valve all are connected. The accessible switches the flow direction of hydraulic oil in hydraulic motor, change hydraulic motor revolve to, through change hydraulic motor revolve to the mode reach the purpose that prevents the sticking of tool.
Description
Technical field
The utility model relates to mining machinery field, particularly relates to a kind of all-hydraulic overload protection valve block.
Background technique
During down-the-hole drill drilling operation, " bit freezing " phenomenon is frequent, and can cause bore bit in severe case, drilling rod is buried under the ground and cannot takes out, this just causes the loss of human and material resources.The main cause producing the problems referred to above is: can strengthen propelling force and driving torque when running into hard formation, cause hole to train off, increase driving torque and the propelling force of boring further.
For overcoming bit freezing phenomenon, existing solution has the following two kinds: one is that rig tractor driver improves attention, and carry brill in time when noting abnormalities, this just increases working strength and the work difficulty of tractor driver.Another kind of way is installation electric hydraulic protective gear, and when moment of torsion increases to certain numerical value, propulsion motor reverses.But because rig working site is severe, vibrations are large, dust is many, and the stagnant ring between electric elements strengthens, and react insensitive, thus effect is not satisfactory.
As Chinese utility model patent (CN201241688Y) discloses a kind of drill-clamping-proof apparatus of hydraulic revolving drill machine, by setting up a pressure transducer in the pipeline of the filler opening end of rotary motor, a solenoid directional control valve is set up in loop between feed cylinder and hand-operated direction valve, when the inlet pressure of rotary motor occurs abnormal, device can complex situations in automatic disposal hole, thus prevent the generation of lock of tool drilling.
But due to the working site bad environments of engineering driller, vibrations are large, dust is many, and the stagnant ring between electric elements strengthens, and being quick on the draw property is poor, so need to carry out further Optimal improvements.
Model utility content
In order to overcome defect in above-mentioned prior art; the utility model aims to provide a kind of all-hydraulic overload protection valve block; (can arrange arbitrarily) when hydraulic system working pressure is elevated to certain numerical value; by changing the rotation direction of advancing hydraulic pressure motor to change drill bit direction of propulsion, and then prevent bit freezing.
For achieving the above object, the utility model provides a kind of all-hydraulic overload protection valve block, has such feature: comprise the first hydraulic-control two-position three-way reversing valve, the second hydraulic-control two-position three-way reversing valve, sequence valve, two position, three-way electromagnetic change valve, the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port; First hydraulic fluid port is connected with the oil inlet hole of the first hydraulic-control two-position three-way reversing valve; Second hydraulic fluid port is connected with the oil inlet hole of the second hydraulic-control two-position three-way reversing valve, first oil outlet of the first hydraulic-control two-position three-way reversing valve, the second oil outlet of the second hydraulic-control two-position three-way reversing valve are all connected with the 3rd hydraulic fluid port, and the second oil outlet of the first hydraulic-control two-position three-way reversing valve, the first oil outlet of the second hydraulic-control two-position three-way reversing valve are all connected with the 4th hydraulic fluid port; Sequence valve is connected with pressure sensitive end; The oil outlet of sequence valve is connected with the second filler opening of two position, three-way electromagnetic change valve, and the oil outlet of two position, three-way electromagnetic change valve is all connected with the hydraulic control end of the first hydraulic-control two-position three-way reversing valve and the second hydraulic-control two-position three-way reversing valve.
Further, two position, three-way electromagnetic change valve is provided with control end.
Further, the first hydraulic fluid port is connected with outside oil pump through selector valve with the second hydraulic fluid port.
Further, selector valve is hand-operated direction valve.
Further, the second relief valve is provided with between oil pump and hand-operated direction valve.
Further, oil pump is connected with sequence valve.
Further, the 3rd hydraulic fluid port and the 4th hydraulic fluid port are connected with oil hydraulic motor.
Further, the 3rd the first relief valve between hydraulic fluid port and oil hydraulic motor, is provided with.
Further, pressure sensitive end is connected with oil hydraulic motor.
Compared with prior art, the invention has the advantages that: first control end is opened during use, two position, three-way electromagnetic change valve is energized, pressure signal can be transferred to pressure sensitive end by oil hydraulic motor, when the force value that pressure signal sets lower than sequence valve, the conducting of sequence valve top, bottom are closed, and two position, three-way electromagnetic change valve bottom leads to closed upper part, then now hydraulic oil flow in oil hydraulic motor by the first hydraulic-control two-position three-way reversing valve by the 3rd hydraulic fluid port in oil pump; Then, hydraulic oil flow into the second hydraulic-control two-position three-way reversing valve by the 4th hydraulic fluid port again and flow back into fuel tank from the second hydraulic fluid port; When the pressure signal in oil hydraulic motor is higher than the value set, hydraulic oil now in oil pump flow in sequence valve, and control end controls two position, three-way electromagnetic change valve, hydraulic oil is made to flow in two position, three-way electromagnetic change valve by sequence valve, hydraulic oil flow into the hydraulic control end of the first hydraulic-control two-position three-way reversing valve and the second hydraulic-control two-position three-way reversing valve respectively by two position, three-way electromagnetic change valve, and the hydraulic oil now in oil pump enters into the first hydraulic-control two-position three-way reversing valve by the first hydraulic fluid port and flow in oil hydraulic motor by the 4th hydraulic fluid port again; Then hydraulic oil flow into the second hydraulic-control two-position three-way reversing valve by the 3rd hydraulic fluid port and flow back in fuel tank by the second hydraulic fluid port again, by switching the flow direction of hydraulic oil in oil hydraulic motor, thus change the rotation direction of oil hydraulic motor, reach by the mode changing oil hydraulic motor rotation direction the object preventing bit freezing.
Accompanying drawing explanation
Fig. 1 is the hydraulic scheme of the all-hydraulic overload protection valve block that embodiment provides;
Fig. 2 is the hydraulic scheme that the all-hydraulic overload protection valve block that provides of embodiment and oil hydraulic motor are used in combination;
Fig. 3 is the hydraulic scheme that all-hydraulic overload protection valve block that the present embodiment provides applies to down-the-hole drill;
In figure, 100, all-hydraulic overload protection valve block; 1, the first hydraulic-control two-position three-way reversing valve; 2, the second hydraulic-control two-position three-way reversing valve; 3, sequence valve; 31, pressure sensitive end; 4, two position, three-way electromagnetic change valve; 41, control end; 5, the first hydraulic fluid port; 6, the second hydraulic fluid port; 7, the 3rd hydraulic fluid port; 8, the 4th hydraulic fluid port; 9, oil pump; 10, oil hydraulic motor; 101, the first relief valve; 102, hand-operated direction valve; 103, the second relief valve.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belongs to the scope of the utility model protection.
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as restriction of the present utility model.
As shown in Figure 1, the all-hydraulic overload protection valve block 100 provided in the present embodiment comprises: the first hydraulic-control two-position three-way reversing valve 1, second hydraulic-control two-position three-way reversing valve 2, sequence valve 3, two position, three-way electromagnetic change valve 4, first hydraulic fluid port 5, second hydraulic fluid port 6, the 3rd hydraulic fluid port 7 and the 4th hydraulic fluid port 8.
Concrete, first hydraulic fluid port 5 is connected with the oil inlet hole of the first hydraulic-control two-position three-way reversing valve 1, second hydraulic fluid port 6 is connected with the oil inlet hole of the second hydraulic-control two-position three-way reversing valve 2, first oil outlet of the first hydraulic-control two-position three-way reversing valve 1 is all connected with the 3rd hydraulic fluid port 7 with the second oil outlet of the second hydraulic-control two-position three-way reversing valve 2, second oil outlet of the first hydraulic-control two-position three-way reversing valve 1 is all connected with the 4th hydraulic fluid port 8 with the first oil outlet of the second hydraulic-control two-position three-way reversing valve 2, in the present embodiment using the oil outlet on the left of the first hydraulic-control two-position three-way reversing valve 1 as its first oil outlet, the oil outlet on right side is as its second oil outlet, oil outlet on the left of second hydraulic-control two-position three-way reversing valve 2 is as its first oil outlet, the oil outlet on right side is as its second oil outlet, sequence valve 3 is connected with pressure sensitive end 31, particularly the control end of sequence valve 3 is connected with pressure sensitive end 31, the other end of pressure sensitive end 31 is connected with oil hydraulic motor 10, by the pressure transmission in oil hydraulic motor 10 to pressure sensitive end 31, then force value is transferred to the control end of sequence valve 3 by pressure sensitive end 31 again, the oil outlet of sequence valve 3 is connected with the second filler opening of two position, three-way electromagnetic change valve 4, in the present embodiment using the filler opening above two position, three-way electromagnetic change valve 4 as its first filler opening, the filler opening of below is as its second filler opening, the oil outlet of two position, three-way electromagnetic change valve 4 is connected with the hydraulic control end of the first hydraulic-control two-position three-way reversing valve 1 and the second hydraulic-control two-position three-way reversing valve 2, the effect of the 3rd hydraulic fluid port 7 and the 4th hydraulic fluid port 8 imports in drive unit by the hydraulic oil of the first hydraulic-control two-position three-way reversing valve 1, or the hydraulic oil Huis in drive unit flows to the second hydraulic-control two-position three-way reversing valve 2.
Two position, three-way electromagnetic change valve 4 is provided with control end 41, only have when control end 41 is opened like this, two position, three-way electromagnetic change valve 4 is energized, if pressure signal turns to higher than controlling the hydraulic oil flow direction during value set, when but if control end 41 is not opened, two position, three-way electromagnetic change valve 4 must not be electric, even if then pressure signal also can not turn to higher than the hydraulic oil flow direction during value set.
As shown in Figure 2; the hydraulic scheme that all-hydraulic overload protection valve block 100 and oil hydraulic motor 10 that the present embodiment provides are used in combination; first hydraulic fluid port 5 and the second hydraulic fluid port 6 are connected to oil pump 9 through hand-operated direction valve 102; oil pump 9 is for providing hydraulic oil to whole system, and the 3rd hydraulic fluid port 7 and the 4th hydraulic fluid port 8 are connected with oil hydraulic motor 10.
The first relief valve 101 is provided with between 3rd hydraulic fluid port 7 and oil hydraulic motor 10, oil hydraulic motor 10 plays driving effect to drill bit in rig, making drill bit rotate forward when oil hydraulic motor 10 rotates forward makes it advance downwards, if drill bit can be driven when oil hydraulic motor 10 reverses to reverse, play the effect preventing drill bit bit freezing, the constant flow in oil hydraulic motor 10 is flow into by the first relief valve 101, oil pump 9 and be provided with hand-operated direction valve 102 between the first hydraulic fluid port 5 and the second hydraulic fluid port 6, the second relief valve 103 is provided with between oil pump 9 and hand-operated direction valve 102, when being regulated by the second relief valve 103 oil pump 9 flow into the first hydraulic fluid port 5 hydraulic fluid flow rate stablize, oil pump 9 is connected with sequence valve 3.
As shown in Figure 2, first control end 41 is opened during use, two position, three-way electromagnetic change valve 4 is energized, pressure signal can be transferred to pressure sensitive end 31 by oil hydraulic motor 10, when the force value that pressure signal sets lower than sequence valve 3, sequence valve 3 top conducting, bottom are closed, two position, three-way electromagnetic change valve 4 bottom conducting closed upper part, then now hydraulic oil flow in oil hydraulic motor 10 by the first hydraulic-control two-position three-way reversing valve 1 by the 3rd hydraulic fluid port 7 in oil pump 9, then, hydraulic oil flow into the second hydraulic-control two-position three-way reversing valve 2 by the 4th hydraulic fluid port 8 again and flow back into fuel tank from the second hydraulic fluid port 6, when the pressure signal in oil hydraulic motor 10 is higher than the value set, hydraulic oil now in oil pump 9 flow in sequence valve 3, and control end 41 controls two position, three-way electromagnetic change valve 4, hydraulic oil is made to flow in two position, three-way electromagnetic change valve 4 by sequence valve 3, hydraulic oil flow into the hydraulic control end of the first hydraulic-control two-position three-way reversing valve 1 and the second hydraulic-control two-position three-way reversing valve 2 respectively by two position, three-way electromagnetic change valve 4, hydraulic oil now in oil pump 9 enters into the first hydraulic-control two-position three-way reversing valve 1 by the first hydraulic fluid port 5 and flow in oil hydraulic motor 10 by the 4th hydraulic fluid port 8 again, then hydraulic oil flow into the second hydraulic-control two-position three-way reversing valve 2 by the 3rd hydraulic fluid port 7 and flow back in fuel tank by the second hydraulic fluid port 6 again, so just the flow direction of hydraulic oil in oil hydraulic motor 10 is commutated, by switching the flow direction of hydraulic oil in oil hydraulic motor 10, thus change the rotation direction of oil hydraulic motor 10, reach by the mode changing oil hydraulic motor 10 rotation direction the object preventing bit freezing.
The hydraulic scheme that all-hydraulic overload protection valve block 100 that the present embodiment provides applies to rig as shown in Figure 3; when the force value that oil hydraulic motor 10 rotates forward is higher than oil hydraulic motor 10 automatic reverse during the force value set, the function preventing drilling rod stuck when achieving boring work.
These are only the utility model preferred embodiment; not thereby mode of execution of the present utility model and protection domain is limited; to those skilled in the art; should recognize and all should be included in the scheme that equivalent replacement done by all utilization the utility model specifications and diagramatic content and apparent change obtain in protection domain of the present utility model.
Claims (9)
1. an all-hydraulic overload protection valve block, is characterized in that: comprise the first hydraulic-control two-position three-way reversing valve, the second hydraulic-control two-position three-way reversing valve, sequence valve, two position, three-way electromagnetic change valve, the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port;
Wherein, described first hydraulic fluid port is connected with the oil inlet hole of described first hydraulic-control two-position three-way reversing valve;
Described second hydraulic fluid port is connected with the oil inlet hole of described second hydraulic-control two-position three-way reversing valve, first oil outlet of described first hydraulic-control two-position three-way reversing valve, the second oil outlet of described second hydraulic-control two-position three-way reversing valve are all connected with described 3rd hydraulic fluid port, and the second oil outlet of described first hydraulic-control two-position three-way reversing valve, the first oil outlet of described second hydraulic-control two-position three-way reversing valve are all connected with described 4th hydraulic fluid port;
Described sequence valve is connected with pressure sensitive end;
The oil outlet of described sequence valve is connected with the second filler opening of described two position, three-way electromagnetic change valve, and the oil outlet of described two position, three-way electromagnetic change valve is all connected with the hydraulic control end of described first hydraulic-control two-position three-way reversing valve and the second hydraulic-control two-position three-way reversing valve.
2. all-hydraulic overload protection valve block according to claim 1, is characterized in that: described two position, three-way electromagnetic change valve is provided with control end.
3. all-hydraulic overload protection valve block according to claim 1, is characterized in that: described first hydraulic fluid port is connected with outside oil pump through selector valve with described second hydraulic fluid port.
4. all-hydraulic overload protection valve block according to claim 3, is characterized in that: described selector valve is hand-operated direction valve.
5. all-hydraulic overload protection valve block according to claim 4, is characterized in that: be provided with the second relief valve between described oil pump and described hand-operated direction valve.
6. all-hydraulic overload protection valve block according to claim 5, is characterized in that: described oil pump is connected with described sequence valve.
7. all-hydraulic overload protection valve block according to claim 1, is characterized in that: described 3rd hydraulic fluid port and described 4th hydraulic fluid port are connected with oil hydraulic motor.
8. all-hydraulic overload protection valve block according to claim 7, is characterized in that: be provided with the first relief valve between described 3rd hydraulic fluid port and described oil hydraulic motor.
9. all-hydraulic overload protection valve block according to claim 8, is characterized in that: described pressure sensitive end is connected with described oil hydraulic motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520657465.4U CN204921542U (en) | 2015-08-26 | 2015-08-26 | All -hydraulic overload protection valve piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520657465.4U CN204921542U (en) | 2015-08-26 | 2015-08-26 | All -hydraulic overload protection valve piece |
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| Publication Number | Publication Date |
|---|---|
| CN204921542U true CN204921542U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520657465.4U Active CN204921542U (en) | 2015-08-26 | 2015-08-26 | All -hydraulic overload protection valve piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352597A (en) * | 2022-01-25 | 2022-04-15 | 佳木斯大学 | Overload reverse impact valve and overload prevention method |
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2015
- 2015-08-26 CN CN201520657465.4U patent/CN204921542U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352597A (en) * | 2022-01-25 | 2022-04-15 | 佳木斯大学 | Overload reverse impact valve and overload prevention method |
| CN114352597B (en) * | 2022-01-25 | 2024-04-23 | 佳木斯大学 | Overload reverse impact valve and overload prevention method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |