CN202645531U - Negative flow control hydraulic system of rotary drilling rig and rotary drilling rig - Google Patents

Negative flow control hydraulic system of rotary drilling rig and rotary drilling rig Download PDF

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Publication number
CN202645531U
CN202645531U CN 201220223472 CN201220223472U CN202645531U CN 202645531 U CN202645531 U CN 202645531U CN 201220223472 CN201220223472 CN 201220223472 CN 201220223472 U CN201220223472 U CN 201220223472U CN 202645531 U CN202645531 U CN 202645531U
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China
Prior art keywords
flow control
valve
drilling rig
oil
rotary drilling
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CN 201220223472
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Chinese (zh)
Inventor
刘建开
张洪祥
罗明强
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Beijing Sany Heavy Machinery Co Ltd
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Beijing Sany Heavy Machinery Co Ltd
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Abstract

The utility model discloses a negative flow control hydraulic system of a rotary drilling rig and the rotary drilling rig comprising the same. The negative flow control hydraulic system of the rotary drilling rig comprises a negative flow control pump, a main valve and an executive component and also comprises a sequence valve and a shuttle valve, wherein the oil inlet of the sequence valve is mutually connected with the oil outlet of the negative flow control pump; a first oil inlet of the shuttle valve is mutually connected with the oil outlet of the sequence valve; a second oil inlet of the shuttle valve is mutually connected with a negative feedback port of the main valve; an oil outlet of the shuttle is mutually connected with a control port of the negative flow control pump; and the opening pressure of the sequence valve is not higher than the overflow pressure of the main valve. When the delivery pressure of the negative flow control pump is higher than the overflow pressure, the sequence valve is opened, and part of oil delivered from the negative flow control pump enters the control port of the negative flow control pump through the sequence valve and the shuttle valve in sequence, and thereby, the delivery rate of the negative flow control pump is reduced, the overflow loss is avoided, and an effect that the energy is saved is achieved. Moreover, the negative flow control hydraulic system of the rotary drilling rig is simple in structure and lower in equipment cost.

Description

Rotary drilling rig minus flow control hydraulic system and rotary drilling rig
Technical field
The utility model relates to rotary drilling rig hydraulic control system technical field, particularly a kind of rotary drilling rig minus flow control hydraulic system and rotary drilling rig.
Background technology
Rotary drilling rig is a kind of soil taking hole forming filling pile construction machinery, and it drives rotary bucket rotary cutting soil by drilling rod, then is promoted to unload soil outside the hole and carry out the periodic cycle operation.The characteristics such as rotary drilling rig has that complete machine power is large, output torque is large, hole quality is excellent, flexible operation, efficiency of construction height and environment pollution are little, it cooperates with the drilling tool of different size, is applicable to the geological conditions of China's most areas.Rotary drilling rig has become the principal works machinery that is fit to bored pile construction in the building foundation engineering.
The hydraulic system of rotary drilling rig great majority adopt the minus flow control system of cutting off without pressure at present, when system pressure is higher than the oil pressure relief of setting, and system's overflow, a large amount of energy are wasted.The hydraulic system of rotary drilling rig adopts the power-saving technology not only can Reduce fuel consuming rate, can also reduce the power loss of hydraulic system, improve the engine power utilization rate, the heating of minimizing system, how therefore the normal reliability of using of raising equipment, improved for existing rotary drilling rig minus flow control hydraulic system, energy-conservation to reduce system's overflow realization, be the technical barrier that those skilled in the art need to be resolved hurrily.
The utility model content
In view of this, the utility model proposes a kind of rotary drilling rig minus flow control hydraulic system and rotary drilling rig, to solve the large problem of system's overflow energy loss in the existing rotary drilling rig minus flow control hydraulic system.
On the one hand, the utility model provides a kind of rotary drilling rig minus flow control hydraulic system, and comprising: minus flow control pump, main valve, executive component also comprise: sequence valve and shuttle valve;
The oil-in of described sequence valve links to each other with the oil-out of described minus flow control pump;
The first oil-in of described shuttle valve links to each other with the oil-out of described sequence valve, and its second oil-in links to each other with the negative-feedback hydraulic fluid port of described main valve, and its oil-out links to each other with the control port of described minus flow control pump;
The opening pressure of described sequence valve is not higher than the oil pressure relief of described main valve.
Further, described sequence valve is the internal control type sequence valve.
Further, described internal control type sequence valve is the internal control sequence valve that leaks.
Further, the leak drain tap of sequence valve of described internal control links to each other with fuel tank.
Further, also comprise: reducing valve, the oil-in of described reducing valve links to each other with the oil-out of described sequence valve, and its oil-out links to each other with the first oil-in of described shuttle valve;
Further, described main valve is minus flow control banked direction control valves.
Further, described executive component is oil cylinder or motor.
On the other hand, the utility model also provides a kind of rotary drilling rig, and this rotary drilling rig is provided with above-mentioned rotary drilling rig minus flow control hydraulic system.
The utility model provides a kind of rotary drilling rig minus flow control hydraulic system, and with respect to prior art, it has additional sequence valve and shuttle valve; The oil-in of sequence valve links to each other with the oil-out of minus flow control pump, and its opening pressure is not higher than the oil pressure relief of described main valve; Two oil-ins of shuttle valve link to each other with the oil-out of sequence valve and the negative-feedback hydraulic fluid port of main valve respectively.When the output pressure of minus flow control pump during greater than oil pressure relief, sequence valve is opened, the control port that enters the minus flow control pump through sequence valve and shuttle valve successively from the part fluid of the output of minus flow control pump, reduce thus the output quantity of minus flow control pump, avoid spill losses, reach energy-conservation effect, and then reduced consumption rate and the power loss of the fuel oil of hydraulic system.And this rotary drilling rig minus flow control hydraulic system structure is simple, and equipment cost is lower.
The utility model also provides a kind of rotary drilling rig, and it is provided with above-mentioned rotary drilling rig minus flow control hydraulic system, because above-mentioned rotary drilling rig minus flow control hydraulic system has above-mentioned technique effect, therefore, this rotary drilling rig also has corresponding technique effect.
Description of drawings
The accompanying drawing that consists of a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
The rotary drilling rig minus flow that Fig. 1 provides for utility model embodiment 1 is controlled the principle schematic of hydraulic system;
The rotary drilling rig minus flow that Fig. 2 provides for utility model embodiment 2 is controlled the principle schematic of hydraulic system.
Description of reference numerals:
1 minus flow control pump
11 control ports
2 main valves
21 negative-feedback hydraulic fluid ports
3 executive components
4 sequence valves
5 shuttle valves
6 reducing valve
The specific embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment in the utility model can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Figure 1 shows that the principle schematic of the rotary drilling rig minus flow control hydraulic system that the utility model embodiment 1 provides, the rotary drilling rig minus flow control hydraulic system that present embodiment provides comprises: minus flow control pump 1, main valve 2, executive component 3 also comprises: sequence valve 4 and shuttle valve 5.
Wherein, the oil-in of sequence valve 4 links to each other with the oil-out of minus flow control pump 1; The opening pressure of sequence valve 4 is not higher than the oil pressure relief of main valve 2;
The first oil-in of shuttle valve 5 links to each other with the oil-out of sequence valve 4, and the second oil-in links to each other with the negative-feedback hydraulic fluid port 21 of main valve 2, and the oil-out of shuttle valve 5 links to each other with the control port 11 of minus flow control pump 1.
The annexation of minus flow control pump 1, main valve 2 and executive component 3 is same as the prior art, and therefore not to repeat here.
Operating principle about minus flow control pump Flow-rate adjustment in the rotary drilling rig minus flow control hydraulic system that present embodiment provides is as follows:
For convenience of description, the oil circuit oil pressure is set as follows:
p S0: a pressure changeable of minus flow control pump 1, described in the utility model pressure changeable is: the minimum pressure that minus flow control pump 1 output flow is changed;
p S1: the operating pressure of minus flow control pump 1;
p 0: the opening pressure of sequence valve 4;
p 2: from the control-oil pressure of negative-feedback hydraulic fluid port 21 outflows;
p 3: the oil pressure relief of main valve 1, p 3〉=p 0
Work as p S1〉=p 0The time:
Sequence valve 4 is opened, the part fluid that flows out from the minus flow control pump 1 oil-out sequence valve 4 of flowing through reaches the first oil-in of shuttle valve 5, because the pressure loss of fluid in sequence valve 4 is less, can ignore, therefore the oil pressure at the first oil-in place of shuttle valve 5 is p at this moment S1
The control oil that flows out from negative-feedback hydraulic fluid port 21 reaches the second oil-in of shuttle valve 5, and the oil pressure at the second oil-in place of shuttle valve 5 is p 2
Because p S1Greater than p 2(it will be understood by those skilled in the art that for Optimization of Energy Saving effect, p 2Usually lower, less than p 2), so the first oil-in of shuttle valve 5 and oil-out conducting;
Behind first oil-in and oil-out conducting of shuttle valve 5, because p S1>p 0, the output flow of minus flow control pump 1 reduces gradually, avoids thus spill losses, reaches energy-saving effect.
Work as p S1<p 0The time:
Sequence valve 4 is in closed condition, and the first oil-in place pressure of shuttle valve 5 is 0, then the second oil-in of shuttle valve 5 and oil-out conducting, and those skilled in the art can regulate the flow of minus flow control pump 1 according to handle or load capacity.
In rotary drilling rig minus flow that present embodiment the provides control hydraulic system, the effect of sequence valve 4 is: when the output pressure of minus flow control pump 1 during greater than oil pressure relief, reduce the output flow of minus flow control pump 1, be equivalent to the effect of pressure cut off.As preferred version, the opening pressure of sequence valve 4 slightly is lower than the oil pressure relief of main valve 2, is specifically as follows: the oil pressure relief of main valve 2 is higher than the opening pressure 0.1 ~ 2Mpa of sequence valve 4.
For the ease of adjusting the opening pressure of sequence valve 4, the sequence valve 4 preferred internal control type sequence valves that adopt.Further, in order to reduce the fault rate of system, sequence valve 4 adopts the internal controls sequence valve that leaks.Preferred, the leak drain tap of sequence valve of above-mentioned internal control links to each other with fuel tank.
The rotary drilling rig minus flow that being illustrated in figure 2 as the utility model embodiment 2 provides is controlled the principle schematic of hydraulic system.The rotary drilling rig minus flow control hydraulic system that present embodiment provides and the difference of embodiment 1 are:
Set up reducing valve 6, the oil-in of reducing valve 6 links to each other with the oil-out of sequence valve 4, and its oil-out links to each other with the first oil-in of shuttle valve 5, and the set pressure of reducing valve 6 is not less than the pressure changeable that rises of minus flow control pump 1.
Reducing valve 6 plays a role in sequence valve 4 conductings, and it is for reducing the hydraulic pressure of the fluid that flows out from sequence valve 4, and the feedback device of system is played a protective role.The more little normal operation that more is conducive to the maintenance system negative feedback arrangement of the setting hydraulic pressure of reducing valve 6, if but set pressure is excessively low, then can affect the emission reduction effect of 4 pairs of minus flow control pumps 1 of sequence valve.For this reason, the set pressure of needs control reducing valve 6 is not less than the pressure changeable that rises of minus flow control pump.
The main valve 1 preferred minus flow control banked direction control valves that adopts in above-described embodiment.Executive component 3 can be oil cylinder or motor.
As shown in the above: the rotary drilling rig minus flow control hydraulic system that above-described embodiment provides has additional sequence valve and shuttle valve, and the opening pressure of sequence valve is not higher than the oil pressure relief of main valve.When the output pressure of minus flow control pump during greater than oil pressure relief, sequence valve is opened, the control port that enters the minus flow control pump through sequence valve and shuttle valve successively from the part fluid of the output of minus flow control pump, reduce the output quantity of minus flow control pump, avoid thus spill losses, reach energy-conservation effect, and then reduced consumption rate and the power loss of the fuel oil of hydraulic system.And this rotary drilling rig minus flow control hydraulic system structure is simple, and equipment cost is lower.
The utility model embodiment 3 also provides a kind of rotary drilling rig, and this rotary drilling rig is provided with above-mentioned rotary drilling rig minus flow control hydraulic system.Because above-mentioned rotary drilling rig minus flow control hydraulic system has above-mentioned technique effect, the rotary drilling rig with this rotary drilling rig minus flow control hydraulic system also should have corresponding technique effect, does not describe in detail at this.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (8)

1. a rotary drilling rig minus flow is controlled hydraulic system, comprising: minus flow control pump (1), main valve (2), executive component (3), it is characterized in that, and also comprise: sequence valve (4) and shuttle valve (5);
The oil-in of described sequence valve (4) links to each other with the oil-out of described minus flow control pump (1);
The first oil-in of described shuttle valve (5) links to each other with the oil-out of described sequence valve (4), and its second oil-in links to each other with the negative-feedback hydraulic fluid port (21) of described main valve (2), and its oil-out links to each other with the control port (11) of described minus flow control pump (1);
The opening pressure of described sequence valve (4) is not higher than the oil pressure relief of described main valve (2).
2. rotary drilling rig minus flow control hydraulic system according to claim 1 is characterized in that described sequence valve (4) is the internal control type sequence valve.
3. rotary drilling rig minus flow according to claim 2 control hydraulic system is characterized in that, described internal control type sequence valve is the internal control sequence valve that leaks.
4. the leak drain tap of sequence valve of rotary drilling rig minus flow according to claim 3 control hydraulic system, described internal control links to each other with fuel tank.
5. rotary drilling rig minus flow according to claim 1 is controlled hydraulic system, it is characterized in that, also comprise: reducing valve (6), the oil-in of described reducing valve (6) links to each other with the oil-out of described sequence valve (4), and its oil-out links to each other with the first oil-in of described shuttle valve (5); The set pressure of described reducing valve (6) is not less than the pressure changeable that rises of minus flow control pump (1).
6. according to claim 1 to the described rotary drilling rig minus flow control of 5 any one hydraulic system, it is characterized in that described main valve (2) is minus flow control banked direction control valves.
7. according to claim 1 to the described rotary drilling rig minus flow control of 5 any one hydraulic system, it is characterized in that described executive component (3) is oil cylinder or motor.
8. a rotary drilling rig is characterized in that, this rotary drilling rig is provided with such as the described rotary drilling rig minus flow control of claim 1 to 7 any one hydraulic system.
CN 201220223472 2012-05-17 2012-05-17 Negative flow control hydraulic system of rotary drilling rig and rotary drilling rig Active CN202645531U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220223472 CN202645531U (en) 2012-05-17 2012-05-17 Negative flow control hydraulic system of rotary drilling rig and rotary drilling rig

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Application Number Priority Date Filing Date Title
CN 201220223472 CN202645531U (en) 2012-05-17 2012-05-17 Negative flow control hydraulic system of rotary drilling rig and rotary drilling rig

Publications (1)

Publication Number Publication Date
CN202645531U true CN202645531U (en) 2013-01-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696687A (en) * 2013-12-10 2014-04-02 徐州徐工基础工程机械有限公司 Integral drilling pressure control system of deep well drilling rig
CN104444893A (en) * 2014-11-27 2015-03-25 中联重科股份有限公司 Winch control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696687A (en) * 2013-12-10 2014-04-02 徐州徐工基础工程机械有限公司 Integral drilling pressure control system of deep well drilling rig
CN103696687B (en) * 2013-12-10 2016-04-06 徐州徐工基础工程机械有限公司 A kind of deep drilling rig monolithic drilling pressure control system
CN104444893A (en) * 2014-11-27 2015-03-25 中联重科股份有限公司 Winch control system
CN104444893B (en) * 2014-11-27 2016-10-05 中联重科股份有限公司 Winch control system

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