CN202646202U - Travel control device of concrete pumping equipment and series connection hydro-cylinders - Google Patents
Travel control device of concrete pumping equipment and series connection hydro-cylinders Download PDFInfo
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- CN202646202U CN202646202U CN 201220308358 CN201220308358U CN202646202U CN 202646202 U CN202646202 U CN 202646202U CN 201220308358 CN201220308358 CN 201220308358 CN 201220308358 U CN201220308358 U CN 201220308358U CN 202646202 U CN202646202 U CN 202646202U
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- oil cylinder
- control device
- piston
- movement position
- travel control
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Abstract
The utility model provides a travel control device of concrete pumping equipment and series connection hydro-cylinders. The travel control device of the series connection hydro-cylinders comprises a first position detection unit (30), a second position detection unit (40) and a controller (50), wherein the first position detection unit (30) is arranged on a first hydro-cylinder (10), is used for detecting a first movement position (X) of a piston (12) in real time and generates first movement position signals, the second position detection unit (40) is arranged on a second hydro-cylinder (20), is used for detecting a second movement position (Y) of a piston (22) in real time and generates second movement position signals, and the controller (50) is connected with the first position detection unit (30) and the second position detection unit (40), receives the first movement position signals and the second movement position signals, and controls the volume of a communicating cavity to control the travel of the series connection hydro-cylinders according to scheduled control strategy. The travel control device of the concrete pumping equipment and the series connection hydro-cylinders can effectively resolve the problem that the travel of hydro-cylinders can not be adjusted timely in the prior art.
Description
Technical field
The utility model relates to the oil cylinder control field, more specifically, relates to the travel control device of a kind of concrete pumping equipment, serial oil cylinders.
Background technique
As shown in Figure 1, Chinese patent CN 101776107A discloses a kind of travel control device of serial oil cylinders.Please refer to Fig. 1, the first oil cylinder 10 and the second oil cylinder 20 in series arrange, and its rodless cavity is connected to valve 60, and the pressure oil of pump 80 outputs enters the rodless cavity of the first oil cylinder 10 or the second oil cylinder 20 by valve 60.The trip control gear uses two approach switchs 30 ' and 40 ' (wherein, these two approach switchs 30 ' and 40 ' stagger certain distance D) formation control regional, to detect the stroke of the first oil cylinder 10 and the second oil cylinder 20.The connected state (comprising that rod chamber connected sum rodless cavity is communicated with) of the communicated cavity by the position relationship between oil cylinder stroke and the control area (for example: do not reach the control area, reach the control area and surpass the control area) and two the first oil cylinders 10 of connecting and the second oil cylinder 20, judge the fluid volume conditions (comprising very few, suitable, too much) of communicated cavity, so that the volume to communicated cavity is adjusted, thereby oil cylinder stroke is controlled in the control area.
For example, when the fluid volume of communicated cavity was too much, controller 50 controls were mended oil drain valve 70 so that communicated cavity links to each other with fuel tank, thereby to the communicated cavity draining.When the fluid volume of communicated cavity is very few, thereby controller 50 controls are mended oil drain valve 70 so that communicated cavity links to each other to the communicated cavity repairing with the pressure oil of system.When the fluid volume of communicated cavity was suitable, controller 50 controls were mended oil drain valves 70 so that communicated cavity and the external world disconnect.
Guarantee because the precision of the Stroke Control of prior art is the distance D by approach switch 30 ' and 40 ', and this distance D can be subject to the impact of alignment error, thereby affect the precision of Stroke Control, cause the unsettled problem of control accuracy.In addition, prior art must be at previous cylinder movement cycle detection oil cylinder stroke, then at next cycle stroke is regulated, therefore, can not in time adjust the stroke of oil cylinder, the actual motion stroke that may occur owing to oil cylinder has surpassed the problem that predetermined stroke hits cylinder, and the too short and problem of decrease in efficiency of stroke also can occur.
The model utility content
The utility model aims to provide the travel control device of a kind of concrete pumping equipment, serial oil cylinders, to solve the problem that can not in time adjust oil cylinder stroke in the prior art.
For solving the problems of the technologies described above, according to an aspect of the present utility model, a kind of travel control device of serial oil cylinders is provided, serial oil cylinders comprises the first oil cylinder and second oil cylinder of series connection, the piston of the piston of the first oil cylinder and the second oil cylinder all moves between primary importance and the second place, distance between the second place and the primary importance is for setting stroke, the first oil cylinder is communicated cavity with the cavity that the second oil cylinder is connected mutually, travel control device comprises: the primary importance detection unit, be installed on the first oil cylinder, be used for detecting in real time the first oil cylinder piston the first movement position and generate the first movement position signal; Second place detection unit is installed on the second oil cylinder, be used for detecting in real time the second oil cylinder piston the second movement position and generate the second movement position signal; Controller is connected with second place detection unit with the primary importance detection unit, and controller receives the first movement position signal and the second movement position signal, and controls the volume of communicated cavity according to predetermined control strategy with the stroke of control serial oil cylinders.
Further, the difference of the second place and the first movement position is the first value, and the difference of the second place and the second movement position is the second value, the first value and the second value and be traveled distance, controller calculates the difference of setting stroke and traveled distance; Controller is in the situation that difference is controlled the communicated cavity repairing greater than zero, and controller is controlled the communicated cavity draining in the minus situation of value difference.
Further, offer the first test hole on the piston of the first oil cylinder and the piston rod, offer the second test hole on the piston of the second oil cylinder and the piston rod, at least a portion of primary importance detection unit is located in the first test hole, and at least a portion of second place detection unit is located in the second test hole.
Further, travel control device also comprises the benefit oil drain valve, is connected with controller, and controller control is mended oil drain valve to communicated cavity repairing or draining.
According on the other hand of the present utility model, a kind of concrete pumping equipment is provided, comprise pumping installations, pumping installations comprises serial oil cylinders and for the travel control device of controlling serial oil cylinders, travel control device is above-mentioned any travel control device.
The utility model uses the current real-time position information of piston, and the total volume of the communicated cavity of serial oil cylinders is controlled in real time, can in time accurately control the stroke of oil cylinder, has avoided hitting cylinder and the too short problem of stroke.
Description of drawings
The accompanying drawing that consists of the application's a part 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:
Fig. 1 has schematically shown the schematic diagram of the travel control device of series winding oil cylinder of the prior art;
Fig. 2 has schematically shown the schematic diagram of the travel control device of the serial oil cylinders among embodiment of the utility model;
Fig. 3 has schematically shown the schematic diagram of the travel control device of the serial oil cylinders among another embodiment of the utility model; And
Fig. 4 has schematically shown the control flow schematic diagram of the stroke control method of the serial oil cylinders in the utility model.
Reference character among the figure: 10, the first oil cylinder; 11, piston rod; 12, piston; 13, rodless cavity; 14, rod chamber; 20, the second oil cylinder; 21, piston rod; 22, piston; 23, rodless cavity; 24, rod chamber; 30, primary importance detection unit; 30 ', approach switch; 40 ', approach switch; 40, second place detection unit; 50, controller; 60, valve; 70, mend oil drain valve; 80, pump; 90, pump; 100, distributing mechanism; 110, valve; A, primary importance; B, the second place; D, distance; L1, distance; L2, distance; O, left end; X, the first movement position; Y, the second movement position.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As first aspect of the present utility model, provide a kind of travel control device of serial oil cylinders.As shown in Figures 2 and 3, serial oil cylinders comprises the first oil cylinder 10 and second oil cylinder 20 of series connection, the piston 12 of the first oil cylinder 10 and the piston 22 of the second oil cylinder 20 all move between primary importance A and second place B, distance between second place B and the primary importance A is for setting stroke, and the first oil cylinder 10 is communicated cavity with the cavity that the second oil cylinder 20 is connected mutually.
Travel control device comprises: primary importance detection unit 30, be installed on the first oil cylinder 10, be used for detecting in real time the first oil cylinder 10 piston 12 the first movement position X and generate the first movement position signal; Second place detection unit 40 is installed on the second oil cylinder 20, be used for detecting in real time the second oil cylinder 20 piston 22 the second movement position Y and generate the second movement position signal; Controller 50 is connected with second place detection unit with primary importance detection unit 30 and is connected, and controller 50 receives the first movement position signal and the second movement position signals, and according to the volume of the predetermined control strategy control communicated cavity stroke with the control serial oil cylinders.
Because serial oil cylinders in the course of the work, communicated cavity (i.e. two chambeies that are interconnected of the first oil cylinder and the second oil cylinder, for example, rod chamber among Fig. 2 and Fig. 3) fluid volume has determined the stroke of cylinder movement, as long as therefore can control the fluid volume of communicated cavity, just the stroke of oil cylinder is controlled on energy ground.
In a preferred embodiment, the difference of second place B and the first movement position X is the first value, the difference of second place B and the second movement position Y is the second value, the first value and the second value and be traveled distance, controller calculates the difference of setting stroke and traveled distance; Controller 50 is in the situation that difference is controlled the communicated cavity repairing greater than zero, and controller is controlled the communicated cavity draining in the minus situation of value difference.Like this, just set up a kind of control strategy, this control strategy can be according to the volume of the difference control communicated cavity of setting stroke and traveled distance, to reach the purpose of control serial oil cylinders stroke.Obviously, can utilize other control strategy to control the volume of communicated cavity, for example, utilize the relation of the total length of the length sum of rodless cavity of the first oil cylinder 10 and the second oil cylinder 20 and the first oil cylinder 10 or the second oil cylinder 20, the volume of control communicated cavity.
Preferably, travel control device also comprises mends oil drain valve 70, is connected with controller 50, and controller 50 controls are mended oil drain valve 70 to communicated cavity repairing or draining.By the operation of repairing or draining, can make the total volume of the communicated cavity that changes the first oil cylinder 10 and the second oil cylinder 20, thereby reach the purpose of adjustment stroke.
Please refer to Fig. 2, the left end of the first oil cylinder 10 and the second oil cylinder 20 is O, and the distance of its primary importance A and left end O is L1, and the distance between second place B and the left end O is L2.Therefore, the setting stroke S of the first oil cylinder 10 and the second oil cylinder 20 is L2-L1.
Please refer to Fig. 2, the distance between piston 12 and the second place B (i.e. the first value) is L2-X, and the distance between piston 22 and the second place B (i.e. the second value) is L2-Y.The traveled distance S0 of the first oil cylinder 10 and the second oil cylinder 20 be the first value and the second value and, i.e. S0=L2-X+L2-Y=2L2-X-Y is so just can use following formula to be configured to represent the representation of traveled distance.Then, can obtain setting by controller 50 the difference DELTA S of stroke and traveled distance, wherein, Δ S=S-S0.
When Δ S＜0, need by mending oil drain valve 70 repairing in the communicated cavity, thereby increase the volume of communicated cavity, to adjust the position of stroke.As Δ S〉0 the time, need by mending oil drain valve 70 repairing in the communicated cavity, thereby increase the volume of communicated cavity, to adjust the position of stroke.
Like this, in the process of control, do not need as in the prior art, to utilize the first oil cylinder and the second oil cylinder historical position data when the last cycle of motion, only need the real-time position information of using piston current, total volume to the communicated cavity of serial oil cylinders is controlled in real time, just can in time accurately control the stroke of oil cylinder, avoid as much as possible the problem of hitting cylinder that causes owing to stroke is long or the problem that causes decrease in efficiency owing to stroke is too short.In addition, change control because the utility model can be realized the stroke in arbitrary cylinder movement cycle, piston can both be moved within each cycle of motion put in place, thereby improved the working life of pumping efficiency and system.
In addition, because the position of lubricating point on the oil cylinder fixes, if the stroke of control piston accurately just can not guarantee that position that piston can both move to lubricating point accepts lubricatedly at every turn, consequently affected working life of piston.The utility model is the stroke of control piston accurately, thereby, can guarantee that piston can both move to the lubricating point place at every turn, thereby improve the working life of piston.
Preferably, offer the first test hole on the piston 12 of the first oil cylinder 10 and the piston rod 11, offer the second test hole on the piston 22 of the second oil cylinder 20 and the piston rod 21, at least a portion of primary importance detection unit 30 is located in the first test hole, and at least a portion of second place detection unit 40 is located in the second test hole.For example, primary importance detection unit 30 and second place detection unit 40 can be the mangneto sensors.Can detect in real time and accurately the position of the piston of the first oil cylinder 10 and the second oil cylinder 20 by primary importance detection unit and second place detection unit.
During work, the pressure oil of pump 80 outputs enters the first oil cylinder 10 or the second oil cylinder 20 through valve 60, thereby the piston that promotes the first oil cylinder 10 or the second oil cylinder 20 is protruding.For example, when rodless cavity 23 oil-feed of the second oil cylinder 20, the piston of the second oil cylinder 20 stretches out to the right, and the hydraulic oil in its rod chamber 24 flow into the rod chamber 14 of the first oil cylinder 10, thereby the piston of the first oil cylinder 10 is shunk left.In this process, controller 50 is mended oil drain valve 70 to communicated cavity (rod chamber of the first oil cylinder 10 and the second oil cylinder 20) repairing or the draining of the first oil cylinder 10 and the second oil cylinder 20 according to the output control of Δ S, thereby adjust in real time stroke, to prevent from hitting the problem of cylinder or stroke deficiency.When the piston of the second oil cylinder 20 ran to second place B, controller 50 control valves 60 were to rodless cavity 13 fuel feeding of the first oil cylinder 10, thus the commutation of realization oil cylinder.
As second aspect of the present utility model, a kind of concrete pumping equipment (such as concrete mixer etc.) is provided, comprise pumping installations, pumping installations comprises serial oil cylinders and for the travel control device of controlling serial oil cylinders, the trip control gear is the travel control device in the various embodiments described above.
Preferably, the pressure oil of mending oil drain valve 70 can come from any one pump in the hydraulic system of concrete pumping equipment.For example, in the embodiment shown in Figure 2, can come from the pump 80 of pumping mechanism.Again for example, in the embodiment shown in fig. 3, can also come from pump 90 other pumps such as grade of the distributing mechanism 100 of concrete pumping equipment.Wherein, pump 90 provides pressure oil by valve 110 to distributing mechanism 100.
On the basis of above-described embodiment, as the third aspect of the present utility model, provide a kind of stroke control method of serial oil cylinders.Please refer to Fig. 2 and Fig. 3, serial oil cylinders comprises the first oil cylinder 10 and second oil cylinder 20 of series connection, the piston 12 of the first oil cylinder 10 and the piston 22 of the second oil cylinder 20 all move between primary importance A and second place B, and the distance between second place B and the primary importance A is for setting stroke.The first oil cylinder 10 is communicated cavity with the cavity that the second oil cylinder 20 is connected mutually.
Please refer to Fig. 4, the trip controlling method comprises: detect in real time the first oil cylinder 10 piston 12 the first movement position X and generate the first movement position signal; The second movement position Y of the piston 12 of real-time detection the second oil cylinder 20 also generates the second movement position signal; Receive the first movement position signal and the second movement position signal, and control the volume of communicated cavity according to predetermined control strategy with the stroke of control serial oil cylinders.
The difference of second place B and the first movement position X is the first value (being L2-X), and the difference of second place B and the second movement position Y is the second value (being L2-Y); The first value and the second value and for traveled distance S0(be S0=L2-X+L2-Y=2L2-X-Y).Preferably, the volume that the predetermined control strategy of described basis is controlled described communicated cavity comprises with the stroke of controlling described serial oil cylinders: calculate the difference DELTA S that sets stroke S and traveled distance S0, wherein, Δ S=S-S0; In the situation that difference is controlled the communicated cavity draining greater than zero control communicated cavity repairing in the minus situation of value difference.
Like this, in the process of control, utilize the first oil cylinder and the second oil cylinder historical position data when the last cycle of motion not needing to resemble in the prior art, only need to use current real-time position information, just can in time adjust the stroke of oil cylinder, avoid as much as possible the problem of hitting cylinder that causes owing to stroke is long or the problem that causes decrease in efficiency owing to stroke is too short.
As a preferred embodiment, stroke control method also comprises the cylinder diameter according to difference, the first oil cylinder 10 and the second oil cylinder 20, calculates the volume of repairing or draining, and according to actual repairing amount or the oil drain quantity of this volume control.
Further, stroke control method also comprises the flow according to the volume of repairing or draining and repairing or draining, calculates the time of repairing or draining, thus control repairing amount or dredge oil amount.Like this, by the volume of control repairing and draining, just can control the total volume of communicated cavity, thereby play the purpose of accurate control stroke.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.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 (5)
1. the travel control device of a serial oil cylinders, described serial oil cylinders comprises the first oil cylinder (10) and second oil cylinder (20) of series connection, the all motions between primary importance (A) and the second place (B) of the piston (12) of described the first oil cylinder (10) and the piston (22) of described the second oil cylinder (20), distance between the described second place (B) and the described primary importance (A) is for setting stroke, described the first oil cylinder (10) is communicated cavity with the cavity that described the second oil cylinder (20) is connected mutually, it is characterized in that, described travel control device comprises:
Primary importance detection unit (30) is installed on described the first oil cylinder (10), be used for detecting in real time described the first oil cylinder (10) piston (12) the first movement position (X) and generate the first movement position signal;
Second place detection unit (40) is installed on described the second oil cylinder (20), be used for detecting in real time described the second oil cylinder (20) piston (22) the second movement position (Y) and generate the second movement position signal;
Controller (50), with described primary importance detection unit (30) be connected second place detection unit (40) and be connected, described controller (50) receives described the first movement position signal and the second movement position signal, and controls the volume of described communicated cavity to control the stroke of described serial oil cylinders according to predetermined control strategy.
2. travel control device according to claim 1, it is characterized in that, the described second place (B) is the first value with the difference of described the first movement position (X), the described second place (B) is the second value with the difference of described the second movement position (Y), described first the value with described second the value and be traveled distance, described controller calculates the difference of described setting stroke and described traveled distance; Described controller (50) is in the situation that described difference is controlled described communicated cavity repairing greater than zero, and described controller is controlled described communicated cavity draining in the minus situation of described value difference.
3. travel control device according to claim 1, it is characterized in that, offer the first test hole on the piston (12) of described the first oil cylinder (10) and the piston rod (11), offer the second test hole on the piston (22) of described the second oil cylinder (20) and the piston rod (21), at least a portion of described primary importance detection unit (30) is located in described the first test hole, and at least a portion of described second place detection unit (40) is located in described the second test hole.
4. travel control device according to claim 1, it is characterized in that, described travel control device also comprises mends oil drain valve (70), is connected with described controller (50), and described controller (50) the described benefit oil drain valve of control (70) is to described communicated cavity repairing or draining.
5. concrete pumping equipment, comprise pumping installations, described pumping installations comprises serial oil cylinders and is used for controlling the travel control device of described serial oil cylinders, and it is characterized in that, described travel control device is each described travel control device in the claim 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220308358 CN202646202U (en) | 2012-06-28 | 2012-06-28 | Travel control device of concrete pumping equipment and series connection hydro-cylinders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220308358 CN202646202U (en) | 2012-06-28 | 2012-06-28 | Travel control device of concrete pumping equipment and series connection hydro-cylinders |
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| CN202646202U true CN202646202U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220308358 Expired - Lifetime CN202646202U (en) | 2012-06-28 | 2012-06-28 | Travel control device of concrete pumping equipment and series connection hydro-cylinders |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705282A (en) * | 2012-06-28 | 2012-10-03 | 中联重科股份有限公司 | Concrete pumping equipment and travel control device and method for series oil cylinders |
| CN103591006A (en) * | 2013-11-18 | 2014-02-19 | 中联重科股份有限公司 | Pumping stroke optimal control method and system and engineering machine |
| CN107900853A (en) * | 2017-11-24 | 2018-04-13 | 李大德 | The automatic sharpening equipment of tungsten needle |
-
2012
- 2012-06-28 CN CN 201220308358 patent/CN202646202U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705282A (en) * | 2012-06-28 | 2012-10-03 | 中联重科股份有限公司 | Concrete pumping equipment and travel control device and method for series oil cylinders |
| WO2014000378A1 (en) * | 2012-06-28 | 2014-01-03 | 中联重科股份有限公司 | Concrete pumping device, and travel control apparatus and method for series oil cylinder |
| CN102705282B (en) * | 2012-06-28 | 2015-07-15 | 中联重科股份有限公司 | Concrete pumping equipment and travel control device and method for series oil cylinders |
| CN103591006A (en) * | 2013-11-18 | 2014-02-19 | 中联重科股份有限公司 | Pumping stroke optimal control method and system and engineering machine |
| CN103591006B (en) * | 2013-11-18 | 2015-08-12 | 中联重科股份有限公司 | A kind of pumping stroke optimal control method, system and engineering machinery |
| CN107900853A (en) * | 2017-11-24 | 2018-04-13 | 李大德 | The automatic sharpening equipment of tungsten needle |
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