CN202326524U - Hydraulic pump station, hydraulic jacking system and self-lifting tower crane - Google Patents
Hydraulic pump station, hydraulic jacking system and self-lifting tower crane Download PDFInfo
- Publication number
- CN202326524U CN202326524U CN2011204238186U CN201120423818U CN202326524U CN 202326524 U CN202326524 U CN 202326524U CN 2011204238186 U CN2011204238186 U CN 2011204238186U CN 201120423818 U CN201120423818 U CN 201120423818U CN 202326524 U CN202326524 U CN 202326524U
- Authority
- CN
- China
- Prior art keywords
- oil
- hydraulic
- power unit
- fuel tank
- hydraulic power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a hydraulic pump station (10), wherein the hydraulic pump station (10) includes an oil tank (11), a hydraulic pump (12), a reversing valve (13), an oil intake pipe (14) and an oil return pipe (15), wherein the oil tank (11) is connected with the hydraulic pump (12); the hydraulic pump (12) is directly connected with the reversing valve (13) through the oil intake pipe (14); and the reversing valve (13) is connected with the oil tank (11) through the oil return pipe (15). The utility model also discloses a hydraulic jacking system and a self-lifting tower crane. The hydraulic pump station has a simple structure, the connecting points of the hydraulic pipeline is less, and the leakage of the hydraulic oil is reduced.
Description
Technical field
The utility model relates to self-raising tower crane, particularly, relates to a kind of hydraulic power unit, hydraulic jacking system and self-raising tower crane.
Background technique
At present, self-raising tower crane adopts hydraulic jacking system to drive the rising and the decline of crawling mechanism, thereby carries out the jacking and the installation of standard knot when installing or adding standard knot.Usually; The hydraulic jacking system of self-raising tower crane mainly is made up of oil hydraulic cylinder, hydraulic power unit and oil pipe; Wherein, hydraulic power unit is the hydraulic oil that oil hydraulic cylinder provides certain pressure and flow, thereby the piston rod that drives oil hydraulic cylinder is done fore and aft motion; And then the climbing device rising and the decline of driving hoist, carry out the jacking and the installation of standard knot.
Be illustrated in figure 1 as the schematic diagram of hydraulic jacking system of the self-raising tower crane of existing technology, this hydraulic jacking system mainly comprises fuel tank 11, motor 17, oil hydraulic pump 12, selector valve 13, one-way valve 14a, oil hydraulic cylinder 30 and equilibrium valve 20.When self-raising tower crane carried out the jacking operation, the motor 17 of opening hydraulic jacking system drove oil hydraulic pump 12 generations and rotatablely moves, and makes the hydraulic oil in the fuel tank 11 get into selector valve 13 through one-way valve 14a, and gets into oil hydraulic cylinder 30 through selector valve 13.When selector valve 13 is positioned at position, a left side; Hydraulic oil is through the actuator port A of selector valve 13 and the rodless cavity of equilibrium valve 14a entering oil hydraulic cylinder 30; The piston that promotes oil hydraulic cylinder 30 carries out straight line motion; Make piston rod stretch out, the hydraulic oil of rod chamber flow back into fuel tank 11 through the actuator port B of selector valve 13 simultaneously; When selector valve 13 is positioned at right position; Hydraulic oil gets into the rod chamber of oil hydraulic cylinder 30 through the actuator port B of selector valve 13; The piston that promotes oil hydraulic cylinder 30 carries out straight line motion; Make piston rod withdraw, the hydraulic oil of rodless cavity flow back into fuel tank 11 through the actuator port A of equilibrium valve 14a and selector valve 13 simultaneously, thereby the piston of oil hydraulic cylinder 30 carries out opposite motion; When selector valve 13 was positioned at meta, hydraulic oil directly flow back into fuel tank 11 through selector valve 13.
As shown in Figures 2 and 3; The hydraulic jacking system of the self-raising tower crane of existing technology is when making and install; From compact structure and installation purpose easy to connect, usually parts such as fuel tank 11, motor 17, oil hydraulic pump 12, selector valve 13 and one-way valve 14a are installed concentratedly and formed hydraulic power unit 10 together.Oil hydraulic pump 12 is connected with selector valve 13 through oil inlet pipe 14, and one-way valve 14a is arranged on the oil inlet pipe 14.Because the length that extends below on the oil inlet pipe 14 is longer; One-way valve 14a does not fix with other parts on every side; Thereby in the process of work, vibration often takes place and produces noise in one-way valve 14a, causes oil inlet pipe 14 to vibrate thereupon; Cause oil inlet pipe 14 joints to get loose even damage and leakage of oil influences the normal operation of the hydraulic jacking system of hoist.
In hydraulic jacking system; Because selector valve 13 is connected with the rodless cavity of oil hydraulic cylinder 30 through equilibrium valve 20; And self-raising tower crane has only the rodless cavity of oil hydraulic cylinder 30 to be in load condition when carrying out the jacking operation all the time, and rod chamber always is in unloaded state.Owing to be provided with the equilibrium valve 20 that is connected with rodless cavity; Recoil the back situation of oil hydraulic pump 12 of load pressure oil can not appear in the hydraulic jacking system of self-raising tower crane; Thereby the one-way valve 14a of the oil outlet setting of oil hydraulic pump 12 does not play a role, and belongs to unnecessary hydraulic element.
Therefore, need be a kind of simple in structure, reduce the hydraulic power unit of hydraulic oil seepage.
The model utility content
The purpose of the utility model provides a kind of hydraulic power unit and hydraulic jacking system, and this hydraulic power unit is simple in structure, and the hydraulic pipe line tie point is less, has reduced the seepage of hydraulic oil.
To achieve these goals; The one side of the utility model provides a kind of hydraulic power unit; Wherein, this hydraulic power unit comprises fuel tank, oil hydraulic pump, selector valve, oil inlet pipe and return tube, and said fuel tank is connected with said oil hydraulic pump; Said oil hydraulic pump directly is connected with said selector valve through said oil inlet pipe, and said selector valve is connected with said fuel tank through said return tube.
Preferably, said fuel tank comprises base plate, and this base plate is set to by peak towards the downward-sloping shape of minimum point, makes hydraulic oil to flow out from said minimum point.
Preferably, said fuel tank comprises the mouth of draining the oil, and this mouth of draining the oil is arranged on the sidewall of said fuel tank and is positioned at the position of said minimum point.
Preferably, this hydraulic power unit also comprises level meter, and this level meter is arranged on the middle part of the sidewall of said fuel tank.
Preferably, this hydraulic power unit also comprises motor and connecting base, and this motor is arranged on the roof of said fuel tank driving said oil hydraulic pump, and said oil hydraulic pump is fixed through said connecting base and said motor.
Preferably, said connecting base has flange, and said connecting base is fastenedly connected through said flange and said oil hydraulic pump.
Preferably; This hydraulic power unit also comprises pressure gauge, pressure gauge oil pipe and three-way valve; Said pressure gauge is arranged on the roof of said fuel tank and with said pressure gauge oil pipe and is connected, and said oil inlet pipe all is connected with said pressure gauge oil pipe with said selector valve through said three-way valve.
The utility model a kind of hydraulic jacking system is provided on the other hand; This hydraulic jacking system is used to drive the climbing device of self-raising tower crane; Said hydraulic jacking system comprises hydraulic power unit, equilibrium valve and oil hydraulic cylinder, and said hydraulic power unit is connected with the rodless cavity of said oil hydraulic cylinder through said equilibrium valve, and the rod chamber of said oil hydraulic cylinder is connected with said hydraulic power unit; Wherein, said hydraulic power unit is a hydraulic power unit recited above.
The one side again of the utility model provides a kind of self-raising tower crane; This self-raising tower crane comprises hydraulic jacking system and climbing device; Said hydraulic jacking system drives said climbing device, and wherein, said hydraulic jacking system is a hydraulic jacking system recited above.
Through technique scheme, selector valve is arranged on the roof of fuel tank, and oil hydraulic pump is arranged on the inside of fuel tank and is positioned at lower position, and selector valve and oil hydraulic pump also can be arranged on the position of other any appropriate certainly.Because hydraulic power unit is not provided with the one-way valve of the fuel-displaced side of oil hydraulic pump, oil hydraulic pump directly is connected with selector valve through oil inlet pipe, has reduced the setting of hydraulic element; Simplified the structure of hydraulic power unit; The tie point of oil inlet pipe reduces, and has reduced the seepage of hydraulic oil, and is economical and practical.
Owing to do not connect one-way valve on the oil inlet pipe; In the process of hydraulic power unit work; The shake that causes because of the spool of one-way valve operation clamping stagnation can not occur, thereby can not cause the vibration of oil inlet pipe, thereby inlet connector is difficult for getting loose and leakage of oil because of the setting of one-way valve.In addition, also avoid the shake of one-way valve and produced noise, and reduced the pressure loss in the oil inlet pipe.
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 is the schematic diagram of the hydraulic jacking system of existing technology;
Fig. 2 is the plan view of hydraulic power unit of the hydraulic jacking system of existing technology;
Fig. 3 is the plan view of hydraulic power unit of the hydraulic jacking system of existing technology;
Fig. 4 is the schematic diagram of hydraulic jacking system of the mode of execution of the utility model;
Fig. 5 is the plan view of hydraulic power unit of hydraulic jacking system of the mode of execution of the utility model; And
Fig. 6 is the plan view of hydraulic power unit of hydraulic jacking system of the mode of execution of the utility model.
Description of reference numerals
10 hydraulic power units, 11 fuel tanks
12 oil hydraulic pumps, 13 selector valves
14 oil inlet pipe 14a one-way valves
15 return tubes, 16 level meters
17 motors, 18 connecting bases
19 pressure gauge 19a pressure gauge oil pipes
19b three-way valve 20 equilibrium valves
30 oil hydraulic cylinders, 111 base plates
112 mouth 181 flanges of draining the oil
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.
In the utility model, not do under the situation of opposite explanation, the noun of locality of use typically refers to higher position longitudinally, lower position as shown in Figure 5 like " upper and lower ".
Like Fig. 4 and shown in Figure 5; The one side of the utility model provides a kind of hydraulic power unit 10; Wherein, this hydraulic power unit 10 comprises fuel tank 11, oil hydraulic pump 12, selector valve 13, oil inlet pipe 14 and return tube 15, and said fuel tank 11 is connected with said oil hydraulic pump 12; Said oil hydraulic pump 12 directly is connected with said selector valve 13 through said oil inlet pipe 14, and said selector valve 13 is connected with said fuel tank 11 through said return tube 15.
Owing to do not connect one-way valve 14a on the oil inlet pipe 14; In the process of hydraulic power unit 10 work; The shake that causes because of the spool of one-way valve 14a operation clamping stagnation can not appear; Thereby can not cause the vibration of oil inlet pipe 14 because of the setting of one-way valve 14a, thereby oil inlet pipe 14 joints are difficult for getting loose and leakage of oil.In addition, also avoid the shake of one-way valve 14a and produced noise, and reduced the pressure loss in the oil inlet pipe 14.
Usually, the base plate 111 of fuel tank 11 is designed to writing board shape, and it is not thorough to drain the oil when causing clearing up fuel tank; As shown in Figure 5, preferably, said fuel tank 11 comprises base plate 111; This base plate 111 is set to by peak towards the downward-sloping shape of minimum point, makes hydraulic oil to flow out from said minimum point.The base plate 111 of fuel tank 11 can be set to be roughly the cross section (promptly from the middle inclined downward of two side direction of fuel tank 11) of V-arrangement, also can be set to the inclined-plane by side direction opposite side inclination, as long as hydraulic oil can be emitted from minimum position fully.Thereby the hydraulic oil of fuel tank 11 bottoms gathers the position of the minimum point of base plate 111 easily, makes things convenient for hydraulic oil to flow out fuel tank 11 fully, makes that the replacing of cleaning and hydraulic oil of fuel tank 11 is convenient.
The general hydraulic power unit mouth 112 of will draining the oil is arranged on fuel tank 11 bottoms; Thereby convenient flat base plate is drained the oil, but the mouth 112 of draining the oil that is arranged on the bottom is inconvenient to operate, therefore; As shown in Figure 6; Preferably, said fuel tank 11 comprises the mouth 112 of draining the oil, and this mouth 112 of draining the oil is arranged on the sidewall of said fuel tank 11 and is positioned at the position of said minimum point.Because fuel tank 11 is set to peak towards the downward-sloping shape of minimum point; The mouth 112 of draining the oil is arranged on the sidewall of fuel tank 11 and is positioned at the position of minimum point; Hydraulic oil is emitted easily, thereby can the hydraulic oil in the fuel tank 11 all be emitted, and the operation of the mouth 112 of being convenient to drain the oil.In addition, the size of the mouth 112 of draining the oil can be adjusted as required, to reach the speed of draining the oil that needs.
Because the position that level meter 16 is provided with in the existing technology is too high, can not accurately reflect the liquid level position in the fuel tank 11, and level meter 16 is inconvenient to observe.As shown in Figure 5, preferably, this hydraulic power unit 10 also comprises level meter 16, and this level meter 16 is arranged on the middle part of the sidewall of said fuel tank 11.Level meter 16 is arranged on the middle part of the sidewall of fuel tank 11, and is positioned at the outside of fuel tank 11, is convenient to the reading that operator observe level meter 16.In addition, level meter 16 is positioned at more suitable medium position, can reflect the liquid level position in the fuel tank 11 accurately, so that understand the amount of the hydraulic oil in the fuel tank 11.
As shown in Figure 5; The assembling of oil hydraulic pump 12 for ease and fixing; Preferably; This hydraulic power unit 10 also comprises motor 17 and connecting base 18, and this motor 17 is arranged on the roof of said fuel tank 11 driving said oil hydraulic pump (12), and said oil hydraulic pump 12 is fixed with said motor through said connecting base 18.Because oil hydraulic pump 12 is arranged on fuel tank 11 inside; And fixing with motor 17 through connecting base 18, therefore, connecting base 18 can adopt various suitable structures; As long as can motor 17 and oil hydraulic pump 12 be linked together, make motor 17 drive oil hydraulic pump 12 work.In addition, connecting base 18 can also make that the hydraulic oil in coupling shaft and coupling and the fuel tank 11 is isolated as the sealing and the protecting component of parts such as coupling shaft between oil hydraulic pump 12 and the motor 17 and coupling.
Usually; The connecting end of oil hydraulic pump 12 is provided with flange; This flange is fixedly connected and oil hydraulic pump 12 is fixedly connected with motor 17 with the flange of connecting base 18; Connection between a plurality of parts causes connecting base 18 location inaccurate, thereby can not guarantee the assembling concentricity of oil hydraulic pump 12 and motor 17, damages oil hydraulic pump 12 easily.As shown in Figure 5, preferably, said connecting base 18 has flange 181, and said connecting base 18 is fastenedly connected with said oil hydraulic pump 12 through said flange 181.Because oil hydraulic pump 12 is not provided with flange; Connecting base 18 directly is fastenedly connected through fastening piece with oil hydraulic pump 12 and is integral body; Thereby integral installation is fitted on the motor 17 on the roof that is fixed on fuel tank 11 again, makes the linkage structure of oil hydraulic pump 12 and motor 17 simplify, and whole linkage structure is compacter; Thereby guaranteed the assembling concentricity of oil hydraulic pump 12 and motor 17, reduced the rate of fault of oil hydraulic pump 12.
Because oil inlet pipe 14 should connect pressure gauge 19, connects selector valve 13 again, causes oil inlet pipe 14 joints more, leakage point is more.As shown in Figure 6; Preferably; This hydraulic power unit 10 also comprises pressure gauge 19, pressure gauge oil pipe 19a and three-way valve 19b; Said pressure gauge 19 is arranged on the roof of said fuel tank 11 and with said pressure gauge oil pipe 19a and is connected, and said oil inlet pipe 14 all is connected with said pressure gauge oil pipe 19a with said selector valve 13 through said three-way valve 19b.Oil inlet pipe 14 directly is connected with selector valve 13 with pressure gauge oil pipe 19a through three-way valve 19b; And no longer need other pipeline to connect oil inlet pipe 14 and selector valve 13; Thereby reduced the setting of pipeline and the connection between the pipeline, and then simplified pipeline structure, reduced the hydraulic fluid leak point.
As shown in Figure 4; The utility model a kind of hydraulic jacking system is provided on the other hand; This hydraulic jacking system is used to drive the climbing device of self-raising tower crane; Said hydraulic jacking system comprises hydraulic power unit 10, equilibrium valve 20 and oil hydraulic cylinder 30, and said hydraulic power unit 10 is connected with the rodless cavity of said oil hydraulic cylinder 30 through said equilibrium valve 20, and the rod chamber of said oil hydraulic cylinder 30 is connected with said hydraulic power unit 10; Wherein, said hydraulic power unit 10 is according to hydraulic power unit 10 recited above.
When self-raising tower crane carries out the jacking operation, have only the rodless cavity of oil hydraulic cylinder 30 to be in load condition all the time, rod chamber always is in unloaded state.Owing to be provided with the equilibrium valve 20 that is connected with rodless cavity; Can not occur recoil the back situation of oil hydraulic pump 12 of load pressure oil in the hydraulic jacking system of self-raising tower crane, thereby the one-way valve 14a of the oil outlet setting of oil hydraulic pump 12 does not play a role, one-way valve 14a is removed the setting that has reduced hydraulic element; Make the structure of hydraulic jacking system become simple; Tie point reduces, and has reduced the seepage of hydraulic oil, and is economical and practical.In addition, the shake that causes because of the spool of one-way valve 14a operation clamping stagnation can not occur, thereby can not cause the vibration of oil inlet pipe 14, thereby oil inlet pipe 14 joints are difficult for getting loose and leakage of oil because of the setting of one-way valve 14a.In addition, also avoid the shake of one-way valve 14a and produced noise, and reduced the pressure loss in the oil inlet pipe 14.
The one side again of the utility model provides a kind of self-raising tower crane; This self-raising tower crane comprises hydraulic jacking system and climbing device; Said hydraulic jacking system drives said climbing device, and wherein, said hydraulic jacking system is a hydraulic jacking system recited above.
The hydraulic jacking system of self-raising tower crane drives the climbing device rising and attaching frame is installed, and makes the body of the tower height raise, to reach user demand.Because hydraulic jacking system removes the setting that has reduced hydraulic element with one-way valve 14a, and the structure of hydraulic jacking system is become simply, tie point reduces, and has reduced the seepage of hydraulic oil, and is economical and practical.
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 in addition; Each 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 (9)
1. a hydraulic power unit (10); It is characterized in that; This hydraulic power unit (10) comprises fuel tank (11), oil hydraulic pump (12), selector valve (13), oil inlet pipe (14) and return tube (15); Said fuel tank (11) is connected with said oil hydraulic pump (12), and said oil hydraulic pump (12) directly is connected with said selector valve (13) through said oil inlet pipe (14), and said selector valve (13) is connected with said fuel tank (11) through said return tube (15).
2. hydraulic power unit according to claim 1 (10) is characterized in that, said fuel tank (11) comprises base plate (111), and this base plate (111) is set to by peak towards the downward-sloping shape of minimum point, makes hydraulic oil to flow out from said minimum point.
3. hydraulic power unit according to claim 2 (10) is characterized in that, said fuel tank (11) comprises the mouth of draining the oil (112), and this mouth of draining the oil (112) is arranged on the sidewall of said fuel tank (11) and is positioned at the position of said minimum point.
4. hydraulic power unit according to claim 1 (10) is characterized in that, this hydraulic power unit (10) also comprises level meter (16), and this level meter (16) is arranged on the middle part of the sidewall of said fuel tank (11).
5. hydraulic power unit according to claim 1 (10); It is characterized in that; This hydraulic power unit (10) also comprises motor (17) and connecting base (18); This motor (17) is arranged on the roof of said fuel tank (11) driving said oil hydraulic pump (12), and said oil hydraulic pump (12) is fixing through said connecting base (18) and said motor (17).
6. hydraulic power unit according to claim 5 (10) is characterized in that, said connecting base (18) has flange (181), and said connecting base (18) is fastenedly connected through said flange (181) and said oil hydraulic pump (12).
7. hydraulic power unit according to claim 1 (10); It is characterized in that; This hydraulic power unit (10) also comprises pressure gauge (19), pressure gauge oil pipe (19a) and three-way valve (19b); Said pressure gauge (19) is arranged on the roof of said fuel tank (11) and with said pressure gauge oil pipe (19a) and is connected, and said oil inlet pipe (14) all is connected with said pressure gauge oil pipe (19a) with said selector valve (13) through said three-way valve (19b).
8. hydraulic jacking system; This hydraulic jacking system is used to drive the climbing device of self-raising tower crane; Said hydraulic jacking system comprises hydraulic power unit (10), equilibrium valve (20) and oil hydraulic cylinder (30); Said hydraulic power unit (10) is connected with the rodless cavity of said oil hydraulic cylinder (30) through said equilibrium valve (20); And the rod chamber of said oil hydraulic cylinder (30) is connected with said hydraulic power unit (10), it is characterized in that, said hydraulic power unit (10) is according to any described hydraulic power unit (10) among the claim 1-7.
9. self-raising tower crane; This self-raising tower crane comprises hydraulic jacking system and climbing device; Said hydraulic jacking system drives said climbing device, it is characterized in that, said hydraulic jacking system is a hydraulic jacking system according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204238186U CN202326524U (en) | 2011-10-31 | 2011-10-31 | Hydraulic pump station, hydraulic jacking system and self-lifting tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204238186U CN202326524U (en) | 2011-10-31 | 2011-10-31 | Hydraulic pump station, hydraulic jacking system and self-lifting tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202326524U true CN202326524U (en) | 2012-07-11 |
Family
ID=46438505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204238186U Expired - Fee Related CN202326524U (en) | 2011-10-31 | 2011-10-31 | Hydraulic pump station, hydraulic jacking system and self-lifting tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202326524U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470554A (en) * | 2013-09-30 | 2013-12-25 | 何新 | Vertical hydraulic station and tower crane |
| CN104314925A (en) * | 2014-09-10 | 2015-01-28 | 浙江金鸟压滤机有限公司 | Hydraulic station |
-
2011
- 2011-10-31 CN CN2011204238186U patent/CN202326524U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470554A (en) * | 2013-09-30 | 2013-12-25 | 何新 | Vertical hydraulic station and tower crane |
| CN103470554B (en) * | 2013-09-30 | 2016-08-24 | 何新 | Vertical hydraulic station and tower crane |
| CN104314925A (en) * | 2014-09-10 | 2015-01-28 | 浙江金鸟压滤机有限公司 | Hydraulic station |
| CN104314925B (en) * | 2014-09-10 | 2016-04-27 | 浙江金鸟压滤机有限公司 | A kind of hydraulic station |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202326524U (en) | Hydraulic pump station, hydraulic jacking system and self-lifting tower crane | |
| CN106677973A (en) | Steward type universal wave energy conversion device | |
| CN205475234U (en) | Bootstrapping formula steel protects a pull -out device | |
| CN203403448U (en) | Foundation pile bearing capacity detecting medium exchanging and filling device | |
| CN209669981U (en) | It is a kind of for pumping the gas injection protecting water hammer device of water-carriage system over long distances | |
| CN206338380U (en) | The built-in hydraulic oil suck-back device of speed regulation type hydrodynamic coupler | |
| CN203114789U (en) | Energy saving and noise reduction hydraulic system | |
| CN206501765U (en) | It is a kind of to be used for the hydraulic power drainage system of emergent water drainage car | |
| CN106799985A (en) | A kind of hydraulic power drainage system for water drainage car of meeting an urgent need | |
| CN210240007U (en) | Horizontal mixed flow pump is from inhaling pressure device that intakes | |
| CN203476627U (en) | Energy-saving high-pressure pump | |
| CN208831094U (en) | A kind of engine power output device | |
| CN103132561A (en) | Water supply device for golf course and farm | |
| CN207974975U (en) | A kind of submersible axial flow pump pit shaft exhaust structure | |
| CN205533056U (en) | Drawing liquid composite set of pump and siphon jar | |
| CN212561834U (en) | Non-return device capable of preventing water and smell from returning | |
| CN104728191B (en) | A kind of hydraulic system utilizing hydraulic cylinder piston rod cavity oil storage | |
| CN203412529U (en) | Secondary bore cleaning device for bored pile | |
| CN204419602U (en) | A kind of corrosion resisting centrifugal pump | |
| CN220302472U (en) | Direct current jacking integrated hydraulic power unit | |
| CN208816424U (en) | A kind of servo direct driving pump control hydraulic system | |
| CN202867426U (en) | Solar energy hydraulic station overhead arranged type hydraulic pump electromotor set oil leakage device | |
| RU150412U1 (en) | MODULAR DIESEL PUMPING STATION | |
| CN219840155U (en) | Buried centrifugal pump station | |
| CN208138466U (en) | Ceramic bar surface waterproofing dirt device |
Legal Events
| 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 |
Granted publication date: 20120711 Termination date: 20161031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |