CN202338533U - Closed hydraulic system of pumping device - Google Patents
Closed hydraulic system of pumping device Download PDFInfo
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- CN202338533U CN202338533U CN2011205056151U CN201120505615U CN202338533U CN 202338533 U CN202338533 U CN 202338533U CN 2011205056151 U CN2011205056151 U CN 2011205056151U CN 201120505615 U CN201120505615 U CN 201120505615U CN 202338533 U CN202338533 U CN 202338533U
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Abstract
The utility model discloses a closed hydraulic system of a pumping device. The system comprises a two-way pump (1) and two hydraulic cylinders (21, 22), wherein the two-way pump (1) is connected with the two hydraulic cylinders (21, 22) by virtue of connecting lines; and switch valves (5) are arranged on the connecting lines. By adopting the technical scheme, as the switch valves are arranged on the connecting lines of the system, when the system stops pumping, the connecting lines can be cut off by the switch valves so that the two-way pump and the hydraulic cylinders can be disconnected, thus the hydraulic cylinders can be effectively locked and cylinder slip can be prevented.
Description
Technical field
The utility model relates to Hydraulic Field, particularly, relates to a kind of closed type hydraulic system of pumping installations.
Background technique
Pumping installations (for example concrete pumping device) is a kind of device of extensive use in the engineering machinery, is used for structural materials such as pump concrete, mud.The closed type hydraulic system of pumping installations (for example concrete mixer) comprises two-way pump, two oil hydraulic cylinders, two pumping cylinders and distributing valve.The pumping cylinder is connected with oil hydraulic cylinder, through the to-and-fro motion of hydraulic cylinder piston rod and the concerted action of distributing valve, makes two pumping cylinders alternately accomplish the working procedure that sucks and discharge material (for example concrete).The closed type hydraulic system of pumping installations can switch between high pressure pumping state and low pressure pumping state as required, and its switching mode is usually by manual switchover formula, manually operated valve piece switching type and three kinds of modes of electronic switching type.
For example be depicted as the manual switchover formula closed type hydraulic system of pumping installations like Fig. 1 a and Fig. 1 b.Fig. 1 a is depicted as low pressure pumping state, and two-way pump 1 is communicated with through connecting pipeline with the rod chamber of two oil hydraulic cylinders 21,22, and the rodless cavity of two oil hydraulic cylinders 21,22 is interconnected through connecting pipeline.Fig. 1 b is depicted as high pressure pumping state, and two-way pump 1 is communicated with through connecting pipeline with the rodless cavity of two oil hydraulic cylinders 21,22, and the rod chamber of two oil hydraulic cylinders 21,22 is interconnected through connecting pipeline.This manual switchover formula closed type hydraulic system switches between low pressure pumping state shown in Fig. 1 a and the high pressure pumping state shown in Fig. 1 b through the link position that manually changes connecting pipeline.
Be illustrated in figure 2 as the manually operated valve piece switching type closed type hydraulic system of pumping installations.Two-way pump 1 is communicated with two pressure hydraulic fluid ports of manually operated type high low pressure switching valve 4, and four actuator ports of manually operated type high low pressure switching valve 4 are communicated with the rod chamber and the rodless cavity of two oil hydraulic cylinders 21,22 respectively.When manually operated type high low pressure switching valve 4 is in position, a left side (as shown in Figure 2), this closed type hydraulic system is in high pressure pumping state; When manually operated type high low pressure switching valve 4 was in right position, this closed type hydraulic system was in low pressure pumping state.This manually operated valve piece switching type closed type hydraulic system switches between low pressure pumping state and high pressure pumping state through manually controlling manually operated type high low pressure switching valve 4.When stopping pumping, manually operated type high low pressure switching valve 4 is in right position usually, promptly is in low pressure pumping state.
Be illustrated in figure 3 as the electronic switching type closed type hydraulic system of pumping installations.The connecting pipeline of two-way pump 1 and two oil hydraulic cylinders 21,22 is provided with six logical valves 31,32,33,34,35,36.The control mouth that is connected the control mouth of the logical valve 31,32 on the connecting pipeline between the rodless cavity of said two-way pump 1 and two oil hydraulic cylinders 21,22 and is connected the logical valve 33 on the connecting pipeline between the rod chamber of two oil hydraulic cylinders 21,22 is communicated with an actuator port 4A of electrodynamic type high low pressure switching valve 4; The control mouth that is connected the control mouth of the logical valve 34,35 on the connecting pipeline between the rod chamber of two-way pump 1 and two oil hydraulic cylinders 21,22 and is connected the logical valve 36 on the connecting pipeline between the rodless cavity of two oil hydraulic cylinders 21,22 is communicated with another actuator port 4B of electrodynamic type high low pressure switching valve 4.Thereby, when electrodynamic type high low pressure switching valve 4 is positioned at position, a left side (electromagnet gets), logical valve 31,32,33 conductings, logical valve 34,35,36 ends, thus this closed type hydraulic system is in high pressure pumping state; When electrodynamic type high low pressure switching valve 4 was positioned at right position (electromagnet dead electricity), logical valve 31,32,33 ended, logical valve 34,35,36 conductings, thus this closed type hydraulic system is in low pressure pumping state.When stopping pumping, electrodynamic type high low pressure switching valve 4 is positioned at right position (electromagnet dead electricity), promptly is in low pressure pumping state.
In the closed type hydraulic system of above-mentioned three kinds of pumping installations, when stopping pumping, the locking of oil hydraulic cylinder 21,22 mainly leans on two-way pump 1 to realize.Because the leakage rate of two-way pump 1 is bigger; Add and also have some in the closed type hydraulic system such as control valves such as high-pressure overflow valve, flushing valves; More or less all have leakage, thereby the closed type hydraulic system that causes above-mentioned pumping installations is when stopping pumping, can't locks oil hydraulic cylinder 21,22; Material can be with the piston of pumping cylinder to pusher, the cylinder phenomenon occurs slipping.
The model utility content
The purpose of the utility model provides a kind of closed type hydraulic system of pumping installations, and this closed type hydraulic system can be locked oil hydraulic cylinder effectively when stopping pumping, thereby the cylinder phenomenon can not occur slipping.
To achieve these goals, on the one hand, the utility model provides a kind of closed type hydraulic system of pumping installations; This closed type hydraulic system comprises two-way pump and two oil hydraulic cylinders; Two-way pump is connected through connecting pipeline with two oil hydraulic cylinders, and wherein, said connecting pipeline is provided with switch valve.
Preferably, on the connecting pipeline that said switch valve is arranged on oil hydraulic cylinder as charging cylinder is connected.
Preferably, said switch valve is arranged on the connecting pipeline that is connected with the rodless cavity of said oil hydraulic cylinder.
Preferably, this closed type hydraulic system also comprises manually operated type high low pressure switching valve, and two pressure hydraulic fluid ports of this high low pressure switching valve are communicated with said two-way pump, and four actuator ports of this high low pressure switching valve are communicated with the rod chamber and the rodless cavity of two oil hydraulic cylinders respectively.
Preferably, said switch valve is arranged on the connecting pipeline between the actuator port of rodless cavity and said high low pressure switching valve of one of them said oil hydraulic cylinder.
Preferably, said switch valve comprises selector valve and logical valve, and said logical valve is connected on the said connecting pipeline, and the control mouth of said logical valve is communicated with the actuator port of said selector valve.
Preferably, this closed type hydraulic system also comprises controller, and when said two-way pump was opened, this controller was controlled said switch valve and is on state, and when said two-way pump was closed, this controller was controlled said switch valve and is in cut-off state.
Preferably, when said two-way pump was closed, this controller was also controlled the distributing valve of said closed type hydraulic system, so that the oil hydraulic cylinder that is connected with the connecting pipeline that is provided with said switch valve is a charging cylinder.
Pass through technique scheme; Because the connecting pipeline of closed type hydraulic system is provided with switch valve; Therefore thereby when system stops pumping, can connecting pipeline be ended, can break off being communicated with between two-way pump and the oil hydraulic cylinder through this switch valve; Thereby can lock oil hydraulic cylinder effectively, the cylinder phenomenon can not occur slipping.
Other feature and advantage of the utility model will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is the further understanding that is used to provide the utility model, and constitutes the part of specification, is used to explain the utility model with following embodiment, but does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 a and Fig. 1 b are the schematic block diagram of the manual switchover formula closed type hydraulic system of existing pumping installations;
Fig. 2 is the schematic block diagram of the manually operated valve piece switching type closed type hydraulic system of existing pumping installations;
Fig. 3 is the schematic block diagram of the electronic switching type closed type hydraulic system of existing pumping installations;
Fig. 4 is the schematic block diagram according to the manually operated valve piece switching type closed type hydraulic system of the pumping installations of a kind of mode of execution of the utility model;
Fig. 5 is the schematic block diagram according to the manually operated valve piece switching type closed type hydraulic system of the pumping installations of the another kind of mode of execution of the utility model;
Fig. 6 is the schematic control block diagram of closed type hydraulic system as shown in Figure 5;
Fig. 7 is the schematic block diagram according to the electronic switching type closed type hydraulic system of the pumping installations of a kind of mode of execution of the utility model.
Description of reference numerals
1 two-way pump; 21,22 oil hydraulic cylinders;
5 switch valves; 4 high low pressure switching valves;
51 selector valves; 52 logical valves;
The 51A actuator port; 6 distributing valves;
31,32,33,34,35,36 logical valves;
4A, 4B actuator port.
Embodiment
Be elaborated below in conjunction with the embodiment of accompanying drawing to the utility model.Should be understood that embodiment described herein only is used for explanation and explains the utility model, is not limited to the utility model.
Be illustrated in figure 4 as the schematic block diagram of the hydraulic system of the pumping installations that a kind of mode of execution according to the utility model provides; This closed type hydraulic system comprises two-way pump 1 and two oil hydraulic cylinders 21,22; Two-way pump 1 and two oil hydraulic cylinders 21,22 are connected through connecting pipeline; Wherein, said connecting pipeline is provided with switch valve 5.
Pass through technique scheme; Because the connecting pipeline of closed type hydraulic system is provided with switch valve 5; Therefore thereby when system stops pumping, can connecting pipeline be ended, can break off being communicated with between two-way pump 1 and the oil hydraulic cylinder 2 through this switch valve 5; Thereby can lock oil hydraulic cylinder 21,22 effectively, the cylinder phenomenon can not occur slipping.
Two-way pump 1 and oil hydraulic cylinder 21,22 are connected through connecting pipeline, and concrete Placement can be confirmed according to actual conditions.For example in manual switchover formula closed type hydraulic system; Can adopt and existingly be connected two-way pump 1 and oil hydraulic cylinder 21,22 with the mode shown in the 1b like Fig. 1 a; Switch valve 5 can be arranged on two-way pump 1 and oil hydraulic cylinder 21, the connecting pipeline between 22; Also can be arranged on the connecting pipeline (shown in Fig. 1 a) between the rodless cavity of two oil hydraulic cylinders 21,22, perhaps be arranged on the connecting pipeline (shown in Fig. 1 b) between the rod chamber of two oil hydraulic cylinders 21,22.For example in manually operated valve piece switching type closed type hydraulic system as shown in Figure 4; This closed type hydraulic system also comprises manually operated type high low pressure switching valve 4; Two pressure hydraulic fluid ports of this high low pressure switching valve 4 are communicated with said two-way pump 1, and four actuator ports of this high low pressure switching valve 4 are communicated with the rod chamber and the rodless cavity of two oil hydraulic cylinders 21,22 respectively.In this case; Switch valve 5 for example can be arranged on the rod chamber and any connecting pipeline between the rodless cavity of four actuator ports and two oil hydraulic cylinders 21,22 of high low pressure switching valve 4, can certainly be arranged on two the pressure hydraulic fluid ports and the connecting pipeline between the said two-way pump 1 of high low pressure switching valve 4.
Preferably, on the connecting pipeline that said switch valve 5 is arranged on oil hydraulic cylinder 21 as charging cylinder is connected.That is to say; When system stops pumping; The oil hydraulic cylinder 21 that is connected with the connecting pipeline that is provided with switch valve 5 (being illustrated in figure 4 as the oil hydraulic cylinder 21 of below) is as charging cylinder; Promptly the piston rod of this oil hydraulic cylinder 21 stretches out, so that the pumping cylinder that is connected with this oil hydraulic cylinder 21 (for example concrete cylinder does not show among the figure) is released material (for example concrete).Another oil hydraulic cylinder 22 then is a material sucting cylinder, i.e. the piston rod of this oil hydraulic cylinder 22 withdrawal is so that the pumping cylinder that is connected with this oil hydraulic cylinder 22 sucks material.This can realize (hereinafter will illustrate in greater detail) through the distributing valve of control closed type hydraulic system when stopping pumping.Through switch valve 5 is arranged on connecting pipeline that oil hydraulic cylinder 21 as charging cylinder is connected on, can be so that the return line of two-way pump 1 ends, thus more effectively lock oil hydraulic cylinder 21, more effectively prevent and slip the cylinder phenomenon.
More preferably, as shown in Figure 4, said switch valve 5 is arranged on the connecting pipeline that is connected with the rodless cavity of said oil hydraulic cylinder 21.Because the hydraulic oil area of contact of rodless cavity is bigger than the hydraulic oil area of contact of rod chamber; Thereby when stopping pumping; The pressure that hydraulic oil between switch valve 5 and the rodless cavity in the passage provides on piston is also bigger; Can back pressure be provided for bigger load, thereby more effectively prevent to slip the generation of cylinder phenomenon, this is especially favourable in long-armed pump truck.For example in mode of execution as shown in Figure 4, switch valve 5 is arranged on the connecting pipeline between the actuator port of rodless cavity and said high low pressure switching valve 4 of one of them said oil hydraulic cylinder 21.More preferably, as indicated above, when stopping pumping, this oil hydraulic cylinder 21 is as charging cylinder.
Switch valve 5 can adopt the various pipelines that can make to end/valve of conducting; For example can be ball valve, bi-bit bi-pass Normally closed type selector valve or bi-bit bi-pass Normally closed type operated proportional flow control valve; This ball valve, selector valve, operated proportional flow control valve can be manually operated types; Be preferably electromagnetic control type, thereby can realize control automatically through controller.
In mode of execution as shown in Figure 4, said switch valve 5 comprises selector valve 51 and logical valve 52, and said logical valve 52 is connected on the said connecting pipeline, and the control mouth of said logical valve 52 is communicated with the actuator port 51A of said selector valve 51.Selector valve 51 can be the selector valve of various suitable types, preferably is illustrated in figure 4 as two four-way electromagnetic reversing valves, thereby can controls automatically through controller easily.Come control logic valve 52 through selector valve 51, when selector valve 51 was positioned at position, a left side (electromagnet dead electricity), the control mouth of logical valve 52 had pressure, and logical valve 52 is in cut-off state, oil hydraulic cylinder 21 lockings; When selector valve 51 was positioned at right position (electromagnet gets), the control mouth of logical valve 52 did not have pressure, and logical valve 52 is on state, oil hydraulic cylinder 21 releases.
Switch valve 5 can manually-operable; Preferably automatically operate through controller, that is, the closed type hydraulic system of pumping installations also comprises controller; When said two-way pump 1 is opened; This controller is controlled said switch valve 5 and is on state, and when said two-way pump 1 was closed, this controller was controlled said switch valve 5 and is in cut-off state.Thereby can realize automatic control easily.More preferably, when said two-way pump 1 was closed, this controller was also controlled the distributing valve 6 of said closed type hydraulic system, so that the oil hydraulic cylinder that is connected with the connecting pipeline that is provided with said switch valve 5 21 is charging cylinder.
Be illustrated in figure 5 as schematic block diagram according to the manually operated valve piece switching type closed type hydraulic system of the pumping installations of the another kind of mode of execution of the utility model.In this embodiment, the setting of two-way pump 1, two oil hydraulic cylinders 21,22, high low pressure switching valve 4 and switch valves 5 is identical with mode of execution as shown in Figure 4 with Placement, repeats no more at this.In mode of execution shown in Figure 5, two-way pump 1 and distributing valve 6 and control valve thereof have more specifically been shown.Wherein solenoid directional control valve 7 is used to control two-way pump 1, and solenoid directional control valve 8 is used to control distributing valve 6.When the electromagnet DT1 of solenoid directional control valve 7 gets when electric, the piston rod of oil hydraulic cylinder 22 stretches out when low pressure pumping state, the piston rod of oil hydraulic cylinder 22 withdrawal when high pressure pumping state.When the electromagnet DT2 of solenoid directional control valve 7 gets when electric, the piston rod of oil hydraulic cylinder 21 stretches out when low pressure pumping state, the piston rod of oil hydraulic cylinder 21 withdrawal when high pressure pumping state.When the electromagnet DT3 of solenoid directional control valve 8 gets when electric, distributing valve 6 (for example S pipe valve) is flapped toward the pumping cylinder that is connected with oil hydraulic cylinder 22, makes oil hydraulic cylinder 22 be charging cylinder.When the electromagnet DT4 of solenoid directional control valve 8 gets when electric, distributing valve 6 (for example S pipe valve) is flapped toward the pumping cylinder that is connected with oil hydraulic cylinder 21, makes oil hydraulic cylinder 21 be charging cylinder.The electromagnet DT5 of the selector valve 51 of switch valve 5 gets when electric, oil hydraulic cylinder 21 releases, and during the electromagnet DT5 dead electricity of selector valve 51, oil hydraulic cylinder 21 lockings.About the setting and the Placement of solenoid directional control valve 7, solenoid directional control valve 8 and distributing valve 6 is well known in the art, repeat no more at this.
Fig. 6 is the schematic control block diagram of closed type hydraulic system as shown in Figure 5.When two-way pump 1 switch opens, the electromagnet DT5 of selector valve 51 gets electric, oil hydraulic cylinder 21 releases.Behind the time-delay T1, two-way pump 1 starts.This moment, controller read in the state of electromagnet DT1, DT2, DT3 and DT4.When two-way pump 1 switch cut out, pumping stopped, electromagnet DT5 dead electricity behind the time-delay T2.Judge that pumping stops the state of moment electromagnet DT4 this moment, electric if electromagnet DT4 gets, and representes that then oil hydraulic cylinder 21 has been a charging cylinder, and control finishes; If electromagnet DT4 dead electricity is then controlled electromagnet DT4 and is got electricly, make oil hydraulic cylinder 21 become charging cylinder, control finishes.
On the other hand; The utility model also provides a kind of controlling method of closed type hydraulic system of pumping installations; Said closed type hydraulic system comprises two-way pump 1 and two oil hydraulic cylinders 21,22, and two-way pump 1 and two oil hydraulic cylinders 21,22 are connected through connecting pipeline, wherein; This method comprises: when said two-way pump 1 is closed, at least one said connecting pipeline is ended.Therefore can break off being communicated with between two-way pump 1 and the oil hydraulic cylinder 2, thereby can lock oil hydraulic cylinder 21,22 effectively, the cylinder phenomenon can not occur slipping.
Preferably, when said two-way pump 1 is closed, the connecting pipeline that is connected with said oil hydraulic cylinder 21 as charging cylinder is ended.Thereby more effectively lock oil hydraulic cylinder 21, more effectively prevent slide cylinder phenomenon.
Preferably, when said two-way pump 1 is closed, the connecting pipeline that is connected with the rodless cavity of said oil hydraulic cylinder 21 is ended.Thereby can back pressure be provided for bigger load, more effectively prevent to slip the generation of cylinder phenomenon.
As indicated above; When above-mentioned closed type hydraulic system carries out the high low pressure switching through manually operated type high low pressure switching valve 4; Preferably; When said two-way pump 1 is closed, the connecting pipeline between the actuator port of rodless cavity and said high low pressure switching valve 4 of one of them said oil hydraulic cylinder 21 is ended.
More preferably, this controlling method also comprises: when said two-way pump 1 is closed, make the said oil hydraulic cylinder 21 that is connected with the said connecting pipeline that ends be charging cylinder.As indicated above, this can realize through the distributing valve 6 of operation closed type hydraulic system.
Also on the other hand, as shown in Figure 7, the also another kind of mode of execution of the utility model provides a kind of pumping installations closed type hydraulic system.This closed type hydraulic system comprises two-way pump 1, logical valve 31,32,33,34,35,36; High low pressure switching valve 4 and two oil hydraulic cylinders 21,22; Two oil hydraulic cylinders 21,22 and two-way pump 1 are connected through connecting pipeline, and logical valve 31,32,33,34,35,36 is arranged on this connecting pipeline, and said high low pressure switching valve 4 is connected with said logical valve 31,32,33,34,35,36; Wherein, said high low pressure switching valve 4 selector valve that is K type meta function.
Pass through technique scheme; When stopping pumping, make high low pressure switching valve 4 be in meta, the control mouth of logical valve 31,32,33,34,35,36 gets; Be in cut-off state; So two-way pump 1 and two oil hydraulic cylinders 21, all connecting pipelines between 22 all end, thereby can lock oil hydraulic cylinder 21,22 effectively, prevent to slip the generation of cylinder phenomenon.
The high low pressure switching valve can be various types of valves that can control logic valve 31,32,33,34,35,36, and preferably as shown in Figure 7, said high low pressure switching valve 4 is a solenoid directional control valve.More specifically, said high low pressure switching valve 4 can be the 3-position 4-way solenoid directional control valve.
About the concrete connecting pipeline and the logical valve 31,32,33,34,35,36 of two-way pump 1 and two oil hydraulic cylinders 21,22 can be provided with according to actual conditions, for example can adopt following set-up mode.As shown in Figure 7; The control mouth that is connected the control mouth of the logical valve 31,32 on the connecting pipeline between the rodless cavity of said two-way pump 1 and two oil hydraulic cylinders 21,22 and is connected the logical valve 33 on the connecting pipeline between the rod chamber of two oil hydraulic cylinders 21,22 is communicated with an actuator port 4B of said high low pressure switching valve 4, and the control mouth that is connected the control mouth of the logical valve 34,35 on the connecting pipeline between the rod chamber of said two-way pump 1 and two oil hydraulic cylinders 21,22 and is connected the logical valve 36 on the connecting pipeline between the rodless cavity of two oil hydraulic cylinders 21,22 is communicated with another actuator port 4A of said high low pressure switching valve 4.When high low pressure switching valve 4 was in position, a left side, logical valve 31,32,33 ended, logical valve 34,35,36 conductings, thus this closed type hydraulic system is in low pressure pumping state.When high low pressure switching valve 4 is positioned at right position, logical valve 31,32,33 conductings, logical valve 34,35,36 ends, thus this closed type hydraulic system is in high pressure pumping state.When stopping pumping, high low pressure switching valve 4 is positioned at meta, and logical valve 31,32,33,34,35,36 all ends, oil hydraulic cylinder 21,22 lockings.
The closed type hydraulic system of above-mentioned pumping installations and controlling method can be used for various suitable pumping installations, for example concrete pumping device, mud pumping installations etc.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned mode of execution; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technological scheme of the utility model, these simple variant all belong to the protection domain of the utility model.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.
Claims (8)
1. the closed type hydraulic system of a pumping installations, this closed type hydraulic system comprises two-way pump (1) and two oil hydraulic cylinders (21,22); Two-way pump (1) and two oil hydraulic cylinders (21; 22) connect through connecting pipeline, it is characterized in that said connecting pipeline is provided with switch valve (5).
2. the closed type hydraulic system of pumping installations according to claim 1 is characterized in that, on the connecting pipeline that said switch valve (5) is arranged on oil hydraulic cylinder (21) as charging cylinder is connected.
3. the closed type hydraulic system of pumping installations according to claim 1 is characterized in that, said switch valve (5) is arranged on the connecting pipeline that is connected with the rodless cavity of said oil hydraulic cylinder (21).
4. the closed type hydraulic system of pumping installations according to claim 1; It is characterized in that; This closed type hydraulic system also comprises manually operated type high low pressure switching valve (4); Two pressure hydraulic fluid ports of this high low pressure switching valve (4) are communicated with said two-way pump (1), and four actuator ports of this high low pressure switching valve (4) are communicated with the rod chamber of two oil hydraulic cylinders (21,22) and rodless cavity respectively.
5. the closed type hydraulic system of pumping installations according to claim 4 is characterized in that, said switch valve (5) is arranged on the connecting pipeline between the actuator port of rodless cavity and said high low pressure switching valve (4) of one of them said oil hydraulic cylinder (21).
6. the closed type hydraulic system of pumping installations according to claim 1; It is characterized in that; Said switch valve (5) comprises selector valve (51) and logical valve (52); Said logical valve (52) is connected on the said connecting pipeline, and the control mouth of said logical valve (52) is communicated with the actuator port (51A) of said selector valve (51).
7. according to the closed type hydraulic system of any described pumping installations in the claim 1 to 6; It is characterized in that; This closed type hydraulic system also comprises controller, and when said two-way pump (1) when opening, this controller is controlled said switch valve (5) and is on state; When said two-way pump (1) when closing, this controller is controlled said switch valve (5) and is in cut-off state.
8. the closed type hydraulic system of pumping installations according to claim 7; It is characterized in that; When said two-way pump (1) when closing; This controller is also controlled the distributing valve (6) of said closed type hydraulic system, so that the oil hydraulic cylinder (21) that is connected with the connecting pipeline that is provided with said switch valve (5) is a charging cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205056151U CN202338533U (en) | 2011-12-07 | 2011-12-07 | Closed hydraulic system of pumping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205056151U CN202338533U (en) | 2011-12-07 | 2011-12-07 | Closed hydraulic system of pumping device |
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| Publication Number | Publication Date |
|---|---|
| CN202338533U true CN202338533U (en) | 2012-07-18 |
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ID=46487225
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205056151U Expired - Fee Related CN202338533U (en) | 2011-12-07 | 2011-12-07 | Closed hydraulic system of pumping device |
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| Country | Link |
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| CN (1) | CN202338533U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425585A (en) * | 2011-12-07 | 2012-04-25 | 中联重科股份有限公司 | Closed hydraulic system for pumping device, and control method for closed hydraulic system |
| CN105134542A (en) * | 2015-08-17 | 2015-12-09 | 镇江长城注浆设备有限公司 | High-pressure and large-flow grouting pump |
-
2011
- 2011-12-07 CN CN2011205056151U patent/CN202338533U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425585A (en) * | 2011-12-07 | 2012-04-25 | 中联重科股份有限公司 | Closed hydraulic system for pumping device, and control method for closed hydraulic system |
| CN105134542A (en) * | 2015-08-17 | 2015-12-09 | 镇江长城注浆设备有限公司 | High-pressure and large-flow grouting pump |
| CN105134542B (en) * | 2015-08-17 | 2019-03-22 | 镇江长城注浆设备有限公司 | High-pressure high-flow grouting pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20171207 |