CN207406274U - Stake machine equipment hydraulic speed-limiting system - Google Patents
Stake machine equipment hydraulic speed-limiting system Download PDFInfo
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- CN207406274U CN207406274U CN201721527233.2U CN201721527233U CN207406274U CN 207406274 U CN207406274 U CN 207406274U CN 201721527233 U CN201721527233 U CN 201721527233U CN 207406274 U CN207406274 U CN 207406274U
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Abstract
The utility model provides a kind of machine equipment hydraulic speed-limiting system, and the stake machine equipment includes swing mechanism, which includes：Hydraulic pump, revolution multi-way valve connection, shuttle valve one, rotary motor, pressure reducing valve, pilot operated directional control valve, pump variable piston, shuttle valve two；Revolution multi-way valve connection is arranged on hydraulic pump output oil pipe road, and hydraulic pump is by turning round multi-way valve connection connection rotary motor；Rotary motor is correspondingly arranged operation handle；The shuttle valve one is arranged among the A/B mouths of the working oil path of rotary motor；The shuttle valve one is used to select pressure oil circuit larger in the A/B mouths of rotary motor working oil path and is connected to the oil inlet of pressure reducing valve.The stake machine equipment can also be hoisting mechanism.The utility model is easy to implement, simple in structure, at low cost, the safe operation performance that can improve a machine well and the conformability to complex working condition.
Description
Technical field
The utility model is related to a kind of hydraulic speed-limiting systems, and in particular to a kind of machine equipment hydraulic speed-limiting system,
More particularly to the stake machine equipment hydraulic speed-limiting system based on minus flow hydraulic control.
Background technology
Stake machine is a kind of piling machinery for piling, using impact force by stake injection stratum, available for high ferro construction.
The stake machine industry market analysis of 2012-2016 China is shown with investment landscape research report：Stake machine is various in style, most common several
Kind：Screw pile driver, diesel hammer piling machine, direct and reverse circulation drilling machine, percussive drill, board-plugging device, Drop hammer pile driver etc..With the whole world
Financial storm comes, and each state all stimulates domestic demand policy in execution, and Investment portion of the China every year in terms of infrastructure is larger,
The particularly rapid development of high ferro has driven the new round climax of piling machinery.
Stake machine is generally by pile monkey, pile frame, column, hound, chassis, walking mechanism, swing mechanism, hoisting mechanism, manipulation
The compositions such as room, hydraulic system and electrical system.Pile monkey be attached to the parallel vertical guide rod (being commonly called as gantry) in pile frame forepart two it
Between, hang liter to lifting hook.Pile frame is a steelwork tower truss, and portion is equipped with hoist engine behind, to lift by crane stake and pile monkey.Stake
The leading truck being made of before frame two guide rods to control piling direction, makes stake according to design orientation injection stratum exactly.
The basic fundamental parameter of piling machine is impact moiety by weight, impact kinetic energy and frequency of impact.Pile monkey can by the power resources of movement
Be divided into drop hammer, steam hammer, diesel hammer, hydraulic hammer etc., a dedicated swing mechanism is typically provided on piling machine, facilitates rotation.
And this piling machine generally controls everything respectively using one group of inverted flux control valve at present, because equipment
Big flow is needed, so when revolution, is easy to cause excessive velocities.It is for the restriction system of swing mechanism rotational speed at present
Control the rotational speed of swing mechanism by limiting the operational stroke of hydraulic handle, but this scheme there are it is apparent the shortcomings that
It is：Rotation pressure needs what large torque turned round because the middle position oil return of minus flow causes pressure that cannot reach setting pressure, some
Revolution action can not be performed under operating mode.
In addition, also having by forcing to throttle, extra flow is acted by overflow valve overflow to realize revolution, but this
The shortcomings that kind scheme is that system heat generation is very serious, influences the service life of equipment.
Two parts of documents disclose the rotary system and control method of two kinds of control rotational speeds below：
Documents 1：CN103669463B discloses acceleration control method, device and the excavation of a kind of Control in Hydraulic Rotation System
Machine.Control method is accelerated to include：Step 10, the current pressure of drum pump is obtained；Step 20, current pressure and threshold pressure are judged
Between relation, current pressure be more than threshold pressure in the case of, perform step 30；Step 30, by the flow control of drum pump
Electric current processed reduces first predetermined value and controls the flow of drum pump to obtain the flow control electric current of next control；Step 40, is followed
Ring performs step 10 to 30, until current pressure is less than or equal to threshold pressure.
Documents 2：CN103527073B discloses a kind of rotary drilling rig control revolution hydraulic circuit system, including main pump,
The main pump has main control valve by pipeline connection, and main control valve has been respectively communicated with pilot handle and rotary motor by pipeline；It is described
Also have revolution deceleration device by pipeline connection between main pump and main control valve, using the above program, rotary drilling rig attonity or return
During other actions beyond turning, turn round solenoid valve in deceleration device must not electricity, the feedback oil circuit of main valve generates feedback pressure warp
The shuttle valve in deceleration device is turned round to main pump stroking mechanism.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of machine equipment hydraulic speed-limiting system, equipments
Including but not limited to swing mechanism, hoisting mechanism；The hydraulic speed-limiting system reaches limitation stake machine work clothes by limiting pumpage
Put the purpose of maximum speed.
In order to solve the above-mentioned technical problem, the utility model uses following technical scheme：
The utility model provides a kind of machine equipment hydraulic speed-limiting system, and the stake machine equipment includes turn-around machine
Structure, the swing mechanism hydraulic speed-limiting system include：
Hydraulic pump, revolution multi-way valve connection, shuttle valve one, rotary motor, pressure reducing valve, pilot operated directional control valve, pump variable piston, shuttle valve
Two；Revolution multi-way valve connection is arranged on hydraulic pump output oil pipe road, and hydraulic pump is by turning round multi-way valve connection connection rotary motor；It returns
Turn motor and be correspondingly arranged operation handle；
The shuttle valve one is arranged among the A/B mouths of the working oil path of rotary motor；
The shuttle valve one is used to select pressure oil circuit larger in the A/B mouths of rotary motor working oil path and is connected to decompression
The oil inlet of valve；
The pressure oil circuit of the oil outlet of the pressure reducing valve includes two-way：It is connected all the way with the oil inlet of pilot operated directional control valve, separately
It is connected all the way with the control mouth of pilot operated directional control valve；
The oil outlet of pilot operated directional control valve is connected with one end of shuttle valve two, and the other end of shuttle valve two and the pump variable of hydraulic pump are lived
Plug connection.
Further,
The stake machine equipment further includes hoisting mechanism；Hoisting mechanism hydraulic speed-limiting system includes：
Hydraulic pump, elevator multi-way valve connection, shuttle valve one, hoist motor, pressure reducing valve, pilot operated directional control valve, pump variable piston, shuttle valve
Two；Elevator multi-way valve connection is arranged on hydraulic pump output oil pipe road, and hydraulic pump joins connection hoist motor by elevator multi-way valve；Volume
It raises motor and is correspondingly arranged operation handle；
The shuttle valve one is arranged among the A/B mouths of the working oil path of hoist motor；
The shuttle valve one is used to select pressure oil circuit larger in the A/B mouths of hoist motor working oil path and is connected to decompression
The oil inlet of valve；
The pressure oil circuit of the oil outlet of the pressure reducing valve includes two-way：It is connected all the way with the oil inlet of pilot operated directional control valve, separately
It is connected all the way with the control mouth of pilot operated directional control valve；
The oil outlet of pilot operated directional control valve is connected with one end of shuttle valve two, and the other end of shuttle valve two and the pump variable of hydraulic pump are lived
Plug connection.
The utility model also provides a kind of stake machine of minus flow hydraulic control, and described device includes swing mechanism and hoist engine
Structure, the swing mechanism use above-mentioned hydraulic speed-limiting system.
Further,
Hoisting mechanism in the stake machine of above-mentioned minus flow hydraulic control uses above-mentioned hydraulic speed-limiting system.
The method for limiting speed of above-mentioned swing mechanism hydraulic speed-limiting system is as follows：
S1, shuttle valve one is set among the A/B hydraulic fluid ports of swing mechanism rotary motor working oil path；Rotary motor is correspondingly arranged
Operation handle；During work, rotary motor being operated by operation handle and is turned round, hydraulic pressure pump discharge head is oily to operation handle, and to
Turn round multi-way valve connection conveying control pressure；Pressure oil among the A/B hydraulic fluid ports of rotary motor working oil path passes through shuttle valve one；
S2, the shuttle valve one select the pressure oil circuit of larger pressure in A/B hydraulic fluid ports to be connected to the oil inlet of pressure reducing valve；
After S3, pressure oil are depressurized by pressure reducing valve, liquid controlled reversing is opened by depressurizing the pressure of working oil path of valve outlet
Valve, then pressure oil shuttle valve two is entered by pilot operated directional control valve；Shuttle valve two is connected to the pump variable piston of hydraulic pump；
S4, the pressure of working oil path in step S3 after pressure reducing valve depressurizes is set as N；Turn round the feedback pressure of multi-way valve connection
For P；Feedback pressure P changes according to the amplitude of operation handle and is changed, and the operation amplitude of operation handle is bigger, and feedback pressure P is got over
It is small；It is otherwise bigger；
Shuttle valve two compares pressure N and feedback pressure P, and the big pressure oil all the way of pressure enters the pump variable piston of hydraulic pump,
Adjust the discharge capacity of hydraulic pump；Work as N>During P, the corresponding pressure oils all the way of pressure N will directly control the pump variable piston boit of hydraulic pump
Plug so as to control the discharge capacity of hydraulic pump, realizes the speed of control equipment.
Further,
When operation handle is failure to actuate, the feedback pressure P of revolution multi-way valve connection is maximum, and the output flow Q pumped at this time is smaller；
When operation handle to maximum position, the feedback pressure P convergences 0 of hydraulic valve, the output flow Q pumped at this time is bigger.
Pressure N, refer to the attached drawing 3, the adjusting section 1 of pressure N can be adjusted by adjusting pressure reducing valve<N<4.Work as operation handle
In the startup operation stage, hydraulic valve feedback pressure P is more than pressure N；When feedback pressure P be less than N, at this point, hydraulic pump maximum it is defeated
Outflow is the corresponding flow Q of N, therefore can realize the maximum output stream to hydraulic pump by the adjusting of the size to pressure N
The adjusting of amount, so as to limit the maximum speed of swing mechanism.
The method for limiting speed of above-mentioned hoisting mechanism hydraulic speed-limiting system is as follows：
S1, shuttle valve one is set among the A/B hydraulic fluid ports of hoisting mechanism hoist motor working oil path；Hoist motor is correspondingly arranged
Operation handle；During work, hoist motor being operated by operation handle and is turned round, hydraulic pressure pump discharge head is oily to operation handle, and to
Elevator multi-way valve connection conveying control pressure；Pressure oil among the A/B hydraulic fluid ports of hoist motor working oil path passes through shuttle valve one；
S2, the shuttle valve one select the pressure oil circuit of larger pressure in the A/B hydraulic fluid ports of hoist motor working oil path to be connected to
The oil inlet of pressure reducing valve；
After S3, pressure oil are depressurized by pressure reducing valve, liquid controlled reversing is opened by depressurizing the pressure of working oil path of valve outlet
Valve, then pressure oil shuttle valve two is entered by pilot operated directional control valve；Shuttle valve two is connected to the pump variable piston of hydraulic pump；
S4, the pressure of working oil path in step S3 after pressure reducing valve depressurizes is set as N；The feedback pressure of elevator multi-way valve connection
For P；Feedback pressure P changes according to the amplitude of operation handle and is changed, and the operation amplitude of operation handle is bigger, and feedback pressure P is got over
It is small；It is otherwise bigger；
Shuttle valve two compares pressure N and feedback pressure P, and the big pressure oil all the way of pressure enters the pump variable piston of hydraulic pump,
Adjust the discharge capacity of hydraulic pump；Work as N>During P, the corresponding pressure oils all the way of pressure N will directly control the pump variable piston boit of hydraulic pump
Plug so as to control the discharge capacity of hydraulic pump, realizes the speed of control equipment.
Further,
When operation handle is failure to actuate, the feedback pressure P of elevator multi-way valve connection is maximum, at this time the output flow Q of hydraulic pump
It is smaller；
When operation handle to maximum position, the output stream of the feedback pressure P convergences 0, at this time hydraulic pump of elevator multi-way valve connection
It is bigger to measure Q.
The speed limit principle phase of the speed limit principle of hoisting mechanism hydraulic speed-limiting system and above-mentioned swing mechanism hydraulic speed-limiting system
Together.
When the equipment for operating stake machine is turned round, the pressure oil of equipment rotation oil can be by this practicality
The scheme of new offer, controls pumpage, can be by the revolution of equipment (including swing mechanism, motor mechanism etc.)
Speed is adjusted to rational operation interval.
The utility model is easy to implement, simple in structure, at low cost, can improve well machine safe operation performance and
To the conformability of complex working condition.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram of the stake machine equipment hydraulic control system of the prior art；
Fig. 2 is the structure diagram of the stake machine equipment hydraulic speed-limiting system of the utility model embodiment；
Fig. 3 is the fundamental diagram of the stake machine equipment hydraulic speed-limiting system of the utility model embodiment；
Above-mentioned reference numeral：
Hydraulic pump 1', revolution multi-way valve connection 2', rotary motor 4', power head multi-way valve connection 5', power head motor 6', pump become
Measure piston 9'；
Hydraulic pump 1, revolution multi-way valve connection 2, revolution shuttle valve 1, rotary motor 4, elevator multi-way valve connection 5, hoist motor 6,
Pressure reducing valve 7, pilot operated directional control valve 8, pump variable piston 9, shuttle valve 2 10；
A, B is the working oil crossing of rotary motor (hoist motor)；A, b is the actuator port of revolution multi-way valve connection；C, d is
The actuator port of elevator multi-way valve connection；
Q is the flow of hydraulic pump；C is hydraulic pump flow curve；D is hydraulic pump power curve；P is feedback pressure；P2 is
The pressure of working oil path.
Specific embodiment
The utility model is further illustrated with reference to the accompanying drawings and embodiments, but is not limited to the model of the utility model
It encloses.
Embodiment 1
As shown in Figure 1, the hydraulic control system of existing stake machine equipment includes：Hydraulic pump 1', revolution multi-way valve connection
2', rotary motor 4', power head multi-way valve connection 5', power head motor 6', pump variable piston 9'；
Hydraulic control system provided in this embodiment cannot be automatically performed to stake machine equipment (swing mechanism, hoist engine
Structure) maximum speed control, can make a big impact to the service life of equipment, largely reduce equipment use the longevity
Life.
Embodiment 2
As Figure 2-3, the present embodiment provides a kind of stake machine using minus flow hydraulic control, including swing mechanism, volume
Raise mechanism etc.；The swing mechanism uses following hydraulic speed-limiting system, specifically includes：
Hydraulic pump 1, revolution multi-way valve connection 2, shuttle valve 1, rotary motor 4, elevator multi-way valve connection 5, hoist motor 6, decompression
Valve 7, pilot operated directional control valve 8, pump variable piston 9, shuttle valve 2 10；
Shuttle valve 1 is arranged among the A/B mouths of the revolution working oil path of rotary motor 4；Shuttle valve 1 is for selection revolution horse
Up to the larger pressure oil circuit in the A/B mouths centre of 4 working oil paths and it is connected to the oil inlet of pressure reducing valve 7；
The pressure oil circuit of the oil outlet of pressure reducing valve 7 includes two-way：The oil inlet with pilot operated directional control valve 8 connects all the way, another
Road is connected with the control mouth of pilot operated directional control valve 8；
The oil outlet of pilot operated directional control valve 8 is connected with one end of shuttle valve 2 10, the other end of shuttle valve 2 10 and the pump of hydraulic pump 1
Variable piston 9 connects.
The method for limiting speed of above-mentioned hydraulic speed-limiting system, specifically comprises the following steps：
S1, shuttle valve 1 is set among the A/B hydraulic fluid ports of 4 working oil path of swing mechanism rotary motor；Rotary motor 4 corresponds to
Operation handle is set；During work, turned round by turning round operation handle operation rotary motor 4,1 discharge pressure of hydraulic pump oil is to operation
Handle, and convey control pressure to revolution multi-way valve connection 2；Pressure oil among the A/B hydraulic fluid ports of the working oil path of rotary motor 4
Pass through shuttle valve 1；
S2, shuttle valve 1 select the pressure oil circuit of larger pressure in A/B hydraulic fluid ports to be connected to the oil inlet of pressure reducing valve 7；
After S3, pressure oil are depressurized by pressure reducing valve 7, and the pressure for passing through the working oil path that pressure reducing valve 7 exports opens hydraulic control
Then reversal valve 8 enters shuttle valve 2 10 by pilot operated directional control valve 8；Shuttle valve 2 10 is connected to the pump variable piston 9 of hydraulic pump 1；
S4, set in step S3 through pressure reducing valve 7 decompression after working oil path pressure as N；Turn round the feedback of multi-way valve connection 2
Pressure is P；Feedback pressure P changes according to the amplitude of revolution operation handle and is changed；The operation amplitude of operation handle is bigger, feedback
Pressure P is smaller；It is otherwise bigger；
Shuttle valve 2 10 compares pressure N and feedback pressure P, and the pump variable that the big pressure oil all the way of pressure enters hydraulic pump 1 is lived
Plug 9 adjusts the discharge capacity of hydraulic pump 1；Work as N>During P, the corresponding pressure oils all the way of pressure N will directly control the pump variable of hydraulic pump 1
9 plunger of piston so as to control the discharge capacity of hydraulic pump 1, realizes the speed of control equipment.
Specifically, the operation principle of the present embodiment is illustrated with reference to Fig. 2,3：
P2 described in Fig. 3 refers to the startup pressure of working oil path, and pressure N is obtained after the decompression of pressure reducing valve 7.
To limit the maximum speed of rotary motor 4, according to the control principle of minus flow hydraulic control, with reference to this implementation of attached drawing
The principle of example illustrates：
Rotary motor 4, revolution multi-way valve connection 2 are operated when in FIG. 2, it is assumed that engine speed is constant, passing through operation handle
Feedback pressure P according to revolution operation handle amplitude change and change, revolution multi-way valve join 2 feedback pressure P Fig. 3's
Change between section 1 to 4, it is assumed that the feedback pressure P of revolution multi-way valve connection 2 is up to the 4 of Fig. 3, and revolution operation handle is failure to actuate
When, the feedback pressure P of revolution multi-way valve connection 2 is 4, and when turning round, operation handle amplitude is bigger, the feedback pressure of revolution multi-way valve connection 2
P is smaller, and when revolution operation handle to maximum position, the feedback pressure P convergences 0 of revolution multi-way valve connection 2, hydraulic pump 1 is defeated at this time
Outflow Q is bigger, and the output flow Q of hydraulic pump 1 is as shown in the C curve of Fig. 3 left sides.
When operation rotary motor 4, the working oil path oil inlet end pressure of rotary motor 4 is subtracted by turning round shuttle valve 1 and entering
Pressure valve 7, the pressure N that pressure reducing valve 7 exports open pilot operated directional control valve 8, by pilot operated directional control valve 8, enter shuttle valve 2 10, at this moment shuttle
Valve 2 10 compares this pressure N and turns round the feedback pressure P of multi-way valve connection 2, by adjust pressure reducing valve 7 can adjust pressure N (can be with
It is set as arbitrary value between 1 to the 4 of 3 left figure of attached drawing), when revolution operation handle is in the startup operation stage, pressure P is more than N, liquid
The output flow Q of press pump 1 be attached drawing 3 left-most curve, when pressure P be less than N, at this point, the maximum output flow of hydraulic pump 1 be N
Corresponding flow Q according to the size that N is adjusted, can adjust the maximum output flow of hydraulic pump 1, so as to limit swing mechanism
Maximum speed.
Variable point of the maximum stream flow curve with power curve D crosspoints and for pump in fig. 3.When rotation pressure continues to increase
Add, when the power of pump is more than the power and variable point of pump setting, the speed of revolution will be run according to power curve D.
Embodiment 3
Difference lies in the revolution shuttle valve 1 in embodiment 1 is set returning to hoist motor with embodiment 2 for the present embodiment
Among the A/B mouths for turning working oil path, that is, above the technical solution of embodiment 1 is applied to the hoist motor circuit of Fig. 2；It is described
Shuttle valve one is used to select pressure oil circuit larger among the A/B mouths of rotary motor working oil path and is connected to the oil inlet of pressure reducing valve
Mouthful, the hydraulic speed-limiting system of the present embodiment is used for the maximum output flow by adjusting hydraulic pump, so as to limit hoisting mechanism
Maximum speed is used to implement and carries out speed limit to hoisting mechanism.Specific operation principle is similar to Example 1.
When operating the equipment of stake machine, equipment is (including the swing mechanism and hoisting mechanism in above-described embodiment
Deng) pressure oil in corresponding motor operations circuit can control pumpage by scheme provided by the utility model, lead to
Overregulating the discharge capacity of hydraulic pump can be adjusted the speed of equipment to rational operation interval.
The utility model is easy to implement, simple in structure, at low cost, can improve well machine safe operation performance and
To the conformability of complex working condition.
The advantages of basic principle, main feature and the utility model of the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Simply illustrate the principle of the utility model, the utility model can also on the premise of not departing from the spirit and scope of the utility model
There are various changes and modifications, these various changes and improvements fall within the scope of the claimed invention.The utility model will
Protection domain is asked to be defined by appended claims and its equivalent.
Claims (2)
1. machine equipment hydraulic speed-limiting system, which is characterized in that the stake machine equipment includes swing mechanism, turn-around machine
Structure hydraulic speed-limiting system includes：
Hydraulic pump, revolution multi-way valve connection, shuttle valve one, rotary motor, pressure reducing valve, pilot operated directional control valve, pump variable piston, shuttle valve two；
Revolution multi-way valve connection is arranged on hydraulic pump output oil pipe road, and hydraulic pump is by turning round multi-way valve connection connection rotary motor；Revolution
Motor is correspondingly arranged operation handle；
The shuttle valve one is arranged among the A/B mouths of the working oil path of rotary motor；
The shuttle valve one is used to select pressure oil circuit larger in the A/B mouths of rotary motor working oil path and is connected to pressure reducing valve
Oil inlet；
The pressure oil circuit of the oil outlet of the pressure reducing valve includes two-way：It is connected all the way with the oil inlet of pilot operated directional control valve, another way
It is connected with the control mouth of pilot operated directional control valve；
The oil outlet of pilot operated directional control valve is connected with one end of shuttle valve two, and the other end of shuttle valve two and the pump variable piston of hydraulic pump connect
It connects.
2. according to claim 1 machine equipment hydraulic speed-limiting system, institute it is characterized in that,
The stake machine equipment further includes hoisting mechanism；Hoisting mechanism hydraulic speed-limiting system includes：
Hydraulic pump, elevator multi-way valve connection, shuttle valve one, hoist motor, pressure reducing valve, pilot operated directional control valve, pump variable piston, shuttle valve two；
Elevator multi-way valve connection is arranged on hydraulic pump output oil pipe road, and hydraulic pump joins connection hoist motor by elevator multi-way valve；Elevator
Motor is correspondingly arranged operation handle；
The shuttle valve one is arranged among the A/B mouths of the working oil path of hoist motor；
The shuttle valve one is used to select pressure oil circuit larger in the A/B mouths of hoist motor working oil path and is connected to pressure reducing valve
Oil inlet；
The pressure oil circuit of the oil outlet of the pressure reducing valve includes two-way：It is connected all the way with the oil inlet of pilot operated directional control valve, another way
It is connected with the control mouth of pilot operated directional control valve；
The oil outlet of pilot operated directional control valve is connected with one end of shuttle valve two, and the other end of shuttle valve two and the pump variable piston of hydraulic pump connect
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721527233.2U CN207406274U (en) | 2017-11-16 | 2017-11-16 | Stake machine equipment hydraulic speed-limiting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721527233.2U CN207406274U (en) | 2017-11-16 | 2017-11-16 | Stake machine equipment hydraulic speed-limiting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207406274U true CN207406274U (en) | 2018-05-25 |
Family
ID=62317561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201721527233.2U Active CN207406274U (en) | 2017-11-16 | 2017-11-16 | Stake machine equipment hydraulic speed-limiting system |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795278A (en) * | 2017-11-16 | 2018-03-13 | 恒天九五重工有限公司 | Stake machine equipment method for limiting speed and hydraulic speed-limiting system |
| CN109279528A (en) * | 2018-11-12 | 2019-01-29 | 山河智能装备股份有限公司 | Elevator pressurization servomechanism and control method |
-
2017
- 2017-11-16 CN CN201721527233.2U patent/CN207406274U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795278A (en) * | 2017-11-16 | 2018-03-13 | 恒天九五重工有限公司 | Stake machine equipment method for limiting speed and hydraulic speed-limiting system |
| CN109279528A (en) * | 2018-11-12 | 2019-01-29 | 山河智能装备股份有限公司 | Elevator pressurization servomechanism and control method |
| CN109279528B (en) * | 2018-11-12 | 2024-02-09 | 山河智能装备股份有限公司 | Winch pressurization follow-up system and control method |
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