CN115143155B - Alternate lifting type hydraulic climbing frame control system and control method - Google Patents
Alternate lifting type hydraulic climbing frame control system and control method Download PDFInfo
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- CN115143155B CN115143155B CN202210909456.4A CN202210909456A CN115143155B CN 115143155 B CN115143155 B CN 115143155B CN 202210909456 A CN202210909456 A CN 202210909456A CN 115143155 B CN115143155 B CN 115143155B
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- 239000003921 oil Substances 0.000 claims description 322
- 239000010720 hydraulic oil Substances 0.000 claims description 63
- 230000009471 action Effects 0.000 claims description 35
- 230000008569 process Effects 0.000 claims description 25
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 210000003813 thumb Anatomy 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 10
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/001—Safety or protective measures against falling down relating to scaffoldings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/046—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
- E04G2003/286—Mobile scaffolds; Scaffolds with mobile platforms mobile vertically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
- F15B2211/783—Sequential control
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention provides an alternate lifting hydraulic climbing frame control system and a control method, belonging to the technical field of wall-attached scaffolds, and comprising a plurality of wall-attached supporting seats, a guide rail, a limiting assembly, a plurality of first lifting cylinders and a plurality of second lifting cylinders; the wall-attached supporting seat is fixedly connected with the wall body; the guide rails are respectively connected with a plurality of vertically arranged wall-attached supporting seats in a sliding manner along the vertical direction; the limiting assemblies are arranged on the wall bodies on the two sides of the wall-attached supporting seat in pairs and at intervals; the first lifting oil cylinder and the second lifting oil cylinder are respectively and fixedly arranged on two sides of the guide rail, and the lifting oil cylinders are also detachably connected with the limiting assembly; the hydraulic lifting device is characterized by further comprising an oil tank, a plurality of hydraulic pumps, a protection electromagnetic valve and a PLC, wherein when the PLC drives the distance between the piston rod of each first lifting oil cylinder and the cylinder body to change, the distance between the piston rod of each second lifting oil cylinder and the cylinder body is kept unchanged or the direction of the distance between the piston rod of each first lifting oil cylinder and the cylinder body is opposite to the changing direction of the distance between the piston rod of each second lifting oil cylinder and the cylinder body.
Description
Technical Field
The invention relates to the technical field of building attached scaffolds, in particular to a control system and a control method for an alternate lifting type hydraulic climbing frame.
Background
The attached lifting scaffold equipment is a novel scaffold technology which is rapidly developed in the early century, and has important influence on the progress of construction technology in China. It becomes the low place operation with the altitude construction, becomes the inside operation of support body pavement with unsettled operation, has apparent low carbon nature, high-tech content and characteristics such as more economical, safer, more convenient. The attached lifting scaffold is erected at a certain height, attached to an engineering structure and capable of climbing or descending layer by layer along with the engineering structure by means of self lifting equipment and devices. The attached lifting scaffold mainly comprises a guide rail, an attached lifting scaffold frame body structure, an attached wall supporting seat, a lifting mechanism and the like. The lifting mechanism can be driven by a manual or hydraulic mode, and is also called a hydraulic climbing frame in a hydraulic lifting mechanism driving mode.
The guide rail is usually embedded in a wall-attached support seat, and the hydraulic mechanism drives the guide rail to ascend or descend along the wall body. When adopting hydraulic pressure mechanism to drive the guide rail along the wall body lift, its expansion end stretches out the back, has a process of waiting for the withdrawal, waits that the expansion end stretches out the back once more, drives guide rail and annex once more and removes one section distance again, and this kind of mode leads to climbing the frame and removes the time nearly half of in-process and all stretch out or reset waiting for the expansion end of hydraulic pressure mechanism, and hydraulic pressure climbs the whole removal efficiency of frame not high. Although the chinese patent application with publication number CN215331368U provides an automatic climbing device with alternate cycle of scaffold, it is also a solution that uses a chain to drive the lifting rail to move intermittently. Therefore, the control system for the alternate lifting type hydraulic climbing frame is developed, different hydraulic lifting mechanisms are driven to alternately act by adopting a reasonable electrical control means, the lifting adjustment efficiency of the climbing frame can be improved inevitably, and the waiting time is reduced.
Disclosure of Invention
In view of the above, the present invention provides a control system and a control method for driving a hydraulic climbing frame to move in an alternate ascending/descending manner, which can save the waiting time of the hydraulic climbing frame during ascending and descending.
The technical scheme of the invention is realized as follows: on one hand, the invention provides an alternate lifting type hydraulic climbing frame control system which comprises a plurality of wall-attached supporting seats (1), a guide rail (2), a limiting assembly (3), a plurality of first lifting oil cylinders (4) and second lifting oil cylinders (5); the wall-attached supporting seats (1) are arranged at intervals along the vertical or horizontal extending direction of the wall body and are respectively and fixedly connected with the wall body; each guide rail (2) is connected with a plurality of vertically arranged wall-attached supporting seats (1) in a sliding manner along the vertical direction; the wall-attached supporting seat (1) limits the direction of the guide rail (2) moving along the wall body in a single direction; the limiting assemblies (3) are arranged on the wall bodies on the two sides of the wall-attached supporting seat (1) in pairs at intervals; the first lifting oil cylinder (4) and the second lifting oil cylinder (5) are respectively and fixedly arranged on two sides of the guide rail (2), and the first lifting oil cylinder (4) or the second lifting oil cylinder (5) is also detachably connected with the limiting assembly (3) and drives the guide rail (2) to linearly move along a wall body;
the hydraulic lifting device is characterized by further comprising an oil tank (6), a plurality of hydraulic pumps (7), protection electromagnetic valves (8) and a PLC, wherein the oil tank (6) is communicated with input ends of the hydraulic pumps (7), output ends of the hydraulic pumps (7) are respectively communicated with an input end of one protection electromagnetic valve (8), and output ends of the protection electromagnetic valves (8) are selectively communicated with a first lifting oil cylinder (4) and a second lifting oil cylinder (5) which are arranged on two sides of one guide rail (2) in pairs; the PLC is electrically connected with the hydraulic pump (7), the protection electromagnetic valve (8), the first lifting oil cylinder (4) and the second lifting oil cylinder (5); when the PLC drives the distance between the piston rod of each first lifting oil cylinder (4) and the cylinder body to change, the distance between the piston rod of each second lifting oil cylinder (5) and the cylinder body is kept unchanged or the direction of the distance between the piston rod of each first lifting oil cylinder (4) and the cylinder body is opposite to the changing direction of the distance between the piston rod of each second lifting oil cylinder (5) and the cylinder body.
On the basis of the technical scheme, preferably, the PLC comprises a plurality of input contacts, an output contact, an oil cylinder rod cavity action button and an oil cylinder rodless cavity action button, and the input contacts of the PLC are respectively electrically connected with the oil cylinder rod cavity action button and the oil cylinder rodless cavity action button; the output contact of the PLC is electrically connected with the coil of each protection electromagnetic valve (8) and the coil of each hydraulic pump (7); the oil cylinder rod cavity action button drives the hydraulic pump (7) to inject hydraulic oil into the rod cavity of the lifting oil cylinder on one side of the guide rail (2), and the oil cylinder rod cavity action button drives the hydraulic pump (7) to inject hydraulic oil into the rod cavity of the lifting oil cylinder on the other side of the guide rail (2), so that piston rods of the first lifting oil cylinder (4) and the second lifting oil cylinder (5) extend out or retract.
Preferably, each of the first lift cylinder (4) and the second lift cylinder (5) is provided with a hydraulic lock assembly (100), a rod-side electromagnetic valve (200) and a rodless-side electromagnetic valve (300); the input end of the rod-side electromagnetic valve (200) or the rodless-side electromagnetic valve (300) is respectively communicated with the output end of the protection electromagnetic valve (8), and the output end of the rod-side electromagnetic valve (200) or the rodless-side electromagnetic valve (300) is respectively communicated with different oil inlet ports of the hydraulic lock assembly (100); the output end of the hydraulic lock assembly (100) is also selectively communicated with one end, close to the piston rod, of each first lifting oil cylinder (4) or one end, far away from the piston rod, of each second lifting oil cylinder (5); the coils of the rod-side electromagnetic valve (200) and the rodless-side electromagnetic valve (300) are respectively and electrically connected with the output contact of the PLC.
Preferably, the hydraulic lock assembly (100) comprises a first check valve (101) and a second check valve (102), the input end of the first check valve (101) is communicated with the output end of a rod-side electromagnetic valve (200) of the first lifting oil cylinder (4) or the second lifting oil cylinder (5), the input end of the first check valve (101) is also communicated with the control end of the second check valve (102), and the output end of the first check valve (101) is communicated with a rod cavity of the oil cylinder of the first lifting oil cylinder (4) or the second lifting oil cylinder (5); the input end of a second one-way valve (102) is communicated with the output end of a rodless side electromagnetic valve of the first lifting oil cylinder (4) or the second lifting oil cylinder (5), the input end of the second one-way valve (102) is also communicated with the control end of the first one-way valve (101), and the output end of the second one-way valve (102) is communicated with a rodless cavity of the first lifting oil cylinder (4) or the second lifting oil cylinder (5); when the hydraulic climbing frame moves along a wall body, the hydraulic pump (7) pumps oil to the first lifting oil cylinder (4) or the second lifting oil cylinder (5), and when hydraulic oil flows through the hydraulic lock assemblies (100) of the first lifting oil cylinder (4) and the second lifting oil cylinder (5), the hydraulic oil flow directions of the first check valve (101) or the second check valve (102) in different hydraulic lock assemblies (100) are opposite.
Preferably, displacement encoders (400) are arranged on the first lifting oil cylinders (4) and the second lifting oil cylinders (5) or the hydraulic pump (7), and the output ends of the displacement encoders (400) are electrically connected with input contacts of the PLC; the displacement encoder (400) acquires a length signal of the piston rod extending or retracting and sends the length signal to the PLC.
Further preferably, the output end of the first check valve (101) and the output end of the second check valve (102) of the hydraulic lock assembly (100) are further provided with a pressure transmitter (500), and the pressure transmitter (500) is electrically connected with the input contact of the PLC.
Preferably, the limiting assembly (3) comprises an installation part (31), a supporting part (32) and a limiting part (33), the installation part (31) is fixedly arranged on the wall, the installation part (31) extends outwards in the direction away from the wall, the supporting part (32) and the limiting part (33) are arranged at one end, away from the wall, of the installation part (31), one end of the supporting part (32) is rotatably connected with the installation part (31), and the other end of the supporting part (32) extends upwards in an inclined manner in the direction away from the wall; a piston rod of the first lifting oil cylinder (4) or the second lifting oil cylinder (5) is abutted against the surface of the abutting part (32), and the piston rod of the first lifting oil cylinder (4) or the second lifting oil cylinder (5) also drives the abutting part (32) to rotate relative to the mounting part (31) and abut against the surface of the limiting part (33); the center of gravity of the abutting portion (32) is arranged to be deviated from the center of the hinge shaft of the abutting portion (32) and the mounting portion (31).
Further preferably, the wall-attached supporting seat (1) comprises a wall-attached body (11), two wall-attached fasteners (12) and a ratchet assembly (13); the wall attaching body (11) is fixedly connected with a wall body, two wall attaching fasteners (12) are symmetrically arranged at one end, far away from the wall body, of the wall attaching body (11), the two wall attaching fasteners (12) are opposite and spaced, clamping grooves are symmetrically arranged on the side surface of the guide rail (2), the two wall attaching fasteners (12) are respectively buckled in the clamping grooves, and a ratchet wheel assembly (13) is arranged at one end, close to the ground, of the wall attaching body (11) and connected with the surface of the clamping grooves in a sliding mode; the ratchet wheel assembly (13) comprises a wall-attached thumb wheel (131), a ratchet wheel body (132), an arc-shaped claw (133) and an elastic component (134); the wall-attached shifting wheel (131) is rotationally connected with the wall-attached body (11), a plurality of shifting teeth (135) are arranged on the surface of the wall-attached shifting wheel (131) at intervals, the shifting teeth (135) are arranged in central symmetry relative to the wall-attached shifting wheel (131), a plurality of limiting rods (21) are arranged on the surface of the guide rail (2) in the length extension direction at intervals, and the shifting teeth (135) are meshed with the limiting rods (21) on the guide rail (2); a ratchet body (132) is fixedly arranged at the end part of a rotating shaft of the wall-attached thumb wheel (131), an arc-shaped clamping jaw (133) is arranged on the wall-attached body (11), and the arc-shaped clamping jaw (133) is rotationally connected with the wall-attached body (11); one end of the elastic component (134) is fixedly connected with the wall-attached body (11), and the other end of the elastic component (134) is fixedly connected with the arc-shaped clamping jaw (133); the end parts of the arc-shaped claws (133) are selectively mutually abutted with the toothed surfaces at different positions of the ratchet wheel body (132) to limit the unidirectional rotation direction of the wall-attached shifting wheel (131) or the ratchet wheel body (132).
On the other hand, the invention also provides a control method of the alternate lifting type hydraulic climbing frame control system, which comprises the following steps:
s1: the alternate lifting type hydraulic climbing frame control system is configured, a plurality of wall-attached supporting seats (1) are arranged on a wall body in an array mode, and a guide rail (2) extending vertically is connected with the wall-attached supporting seats (1) in a sliding mode respectively; limiting assemblies are correspondingly arranged on the wall bodies on the two sides of each wall-attached supporting seat (1); a first lifting oil cylinder (4) and a second lifting oil cylinder (5) are fixedly arranged on two sides of each guide rail (2); the end part of the piston rod of each lifting oil cylinder is hung on the surface of the propping part (32) of the limiting component (3) far away from the ground; enabling piston rods of the first lifting oil cylinder (4) and the second lifting oil cylinder (5) which are at the initial positions to be in a retraction state;
s2: when the hydraulic climbing frame needs to be adjusted to rise upwards along the wall body, the wall-attached supporting seat (1) allows the guide rail (2) to pass upwards in one direction; pressing an oil cylinder rodless cavity action button, injecting hydraulic oil into rodless cavities of the first lifting oil cylinders (4) by the PLC driving hydraulic pumps (7) and keeping the pressure of the hydraulic oil in the rodless cavities unchanged, conducting the second one-way valves (102) of the hydraulic lock assemblies (100) of the first lifting oil cylinders (4) in the forward direction at the moment, bearing pressure by the rodless cavities of the first lifting oil cylinders (4) and outwards pushing out piston rods, enabling the piston rods to upwards rise out to limit positions along a wall body and reach the abutting parts (32) of the adjacent limiting assemblies (3) above, and enabling the end parts of the piston rods in the extending states to be hung on the abutting parts (32) of the adjacent limiting assemblies (3) above; in the process, the second lifting oil cylinder (5) on the other side of each guide rail (2) does not act;
s3: respectively starting a rod cavity action button and a rodless cavity action button of the oil cylinder by taking the end part of the current first lifting oil cylinder (4) extending out of the current piston rod as a fulcrum, then driving a hydraulic pump (7) by a PLC (programmable logic controller) to inject hydraulic oil into the rod cavity of each first lifting oil cylinder (4), at the moment, conducting a first one-way valve (101) of a hydraulic lock assembly (100) of the first lifting oil cylinder (4) in the forward direction, selectively starting a second one-way valve (102) by the hydraulic oil, conducting the second one-way valve (102) in the reverse direction, and refluxing the hydraulic oil in the rodless cavity to an oil tank (6); along with the injection of hydraulic oil, a rod cavity of the first lifting oil cylinder (4) is filled with the hydraulic oil and pressure is kept, and at the moment, a cylinder body of the first lifting oil cylinder (4) drives the guide rail (2) and the second lifting oil cylinder (5) to vertically move upwards along the piston rod until the piston rod is completely retracted into the rod cavity; in the process, the PLC also drives the hydraulic pump (7) to inject hydraulic oil into the rodless cavity of each second lifting oil cylinder (5), at the moment, the second one-way valve (102) of the hydraulic lock component (100) of each second lifting oil cylinder (5) is in forward conduction with the rodless cavity of the corresponding second lifting oil cylinder (5) to bear pressure and push out the piston rod outwards, so that the piston rod of each second lifting oil cylinder (5) reaches the abutting part (32) of the adjacent limiting component (3) above, in the process, when the distance between the rod cavity of the first lifting oil cylinder (4) and the end part of the piston rod is reduced, the distance between the rod cavity of each second lifting oil cylinder (5) and the end part of the piston rod is increased, and the PLC judges the real-time position of each piston rod according to the input signal of the encoder; then, taking the end part of a piston rod extending out of the second lifting oil cylinder (5) as a fulcrum, injecting hydraulic oil into a rodless cavity of the second lifting oil cylinder (5), and discharging the hydraulic oil in a rod cavity of the second lifting oil cylinder (5), namely, a first one-way valve (101) of a hydraulic lock assembly (100) of the second lifting oil cylinder (5) is in forward conduction, a second one-way valve (102) is in reverse conduction, a cylinder body of the second lifting oil cylinder (5) drives a guide rail (2) and a first lifting oil cylinder (4) to vertically lift upwards along the piston rod of the second lifting oil cylinder (5), at the moment, the second one-way valve (102) of the first lifting oil cylinder (4) is in forward conduction, the first one-way valve (101) is in reverse conduction, namely, the piston rod of the first lifting oil cylinder (4) extends out again, and the two piston rods alternately stretch out and draw back, so that the waiting time of the lifting process is shortened; when the hydraulic climbing frame rises to the position of the limiting component (3) with the designated height, the first lifting oil cylinder (4) and the second lifting oil cylinder (5) stop alternately stretching, and the piston rod of each lifting oil cylinder retracts into the rod cavity;
s4: when the hydraulic climbing frame needs to be adjusted to descend downwards along a wall body, the wall-attached supporting seat (1) allows the guide rail (2) to pass downwards in a single direction, the oil cylinder rod cavity action button and the rodless cavity action button are respectively started, the end part of the piston rod of the first lifting oil cylinder (4) and the hanging part of the abutting part (32) of the limiting component (3) are taken as a fulcrum, the end part of the piston rod of the second lifting oil cylinder (5) is separated from the limiting component (3), the second check valve (102) of the hydraulic lock component (100) of the first lifting oil cylinder (4) is conducted in the forward direction, the first check valve (101) is conducted in the reverse direction, hydraulic oil is injected into the rodless cavity of the first lifting oil cylinder (4), the hydraulic oil in the rod cavity of the first lifting oil cylinder (4) is discharged, at the moment, the cylinder body of the first lifting oil cylinder (4), the guide rail (2) and the second lifting oil cylinder (5) move downwards along the vertical direction of the piston rod of the first lifting oil cylinder (4), the second lifting oil cylinder (5) is maintained until the piston rod of the second lifting oil cylinder (4) abuts against the lower end part of the limiting oil cylinder (32), and the piston rod (3) of the lifting oil cylinder (4) extends out; then taking the end part of the piston rod of the current second lifting oil cylinder (5) as a fulcrum, releasing the hanging relationship between the piston rod of the first lifting oil cylinder (4) and the limiting assembly, enabling the second one-way valve (102) of the hydraulic lock assembly (100) of the second lifting oil cylinder (5) to be in forward conduction and the first one-way valve (101) to be in reverse conduction, enabling the cylinder body of the second lifting oil cylinder (5) to be in vertical descending along the piston rod of the second lifting oil cylinder (5) with the guide rail (2) and the first lifting oil cylinder (4), meanwhile, enabling the first one-way valve (101) of the hydraulic lock assembly (100) of the first lifting oil cylinder (4) to be in forward conduction and the second one-way valve (102) to be in reverse conduction, enabling the piston rod of the first lifting oil cylinder (4) to retract and abut against the abutting part (32) of the limiting assembly (3) adjacent to the lower part, and judging the real-time position of each piston rod by the PLC according to the input signal of the encoder; the waiting time of the descending process is reduced by the process that piston rods of different lifting oil cylinders stretch out and draw back alternately; when the hydraulic climbing frame is lowered to the position of the limiting assembly (3) with the designated height, the first lifting oil cylinder (4) and the second lifting oil cylinder (5) stop alternately stretching, and piston rods of the lifting oil cylinders all retract into the rod cavities.
Compared with the prior art, the alternate lifting type hydraulic climbing frame control system and the alternate lifting type hydraulic climbing frame control method provided by the invention have the following beneficial effects:
(1) According to the scheme, the two lifting oil cylinders continuously and alternately operate in the ascending or descending process, when the piston rod of one group of first lifting oil cylinders extends out, the piston rod of the other group of second lifting oil cylinders keeps still or reversely moves, the extending or retracting length of the piston rod is detected in real time through the PLC, the waiting time in the ascending and descending process is saved, the height adjusting efficiency of the hydraulic climbing frame is greatly improved, the one-way passing capacity of the guide rail is stabilized, and the anti-falling function is achieved;
(2) The abutting part of the limiting assembly can rotate, when a piston rod of the lifting oil cylinder vertically passes through the limiting assembly, the abutting part can rotate to avoid, interference is prevented, and the climbing frame can ascend or descend smoothly;
(3) The pair of wall-attached fasteners and the ratchet wheel assembly on the wall-attached supporting seat can increase the contact area with the guide rail, improve the stability of the guide rail during lifting, limit the one-way passing capacity of the guide rail and play a role in preventing falling in the lifting stage;
(4) The control action can be carried out manually or automatically by adopting a PLC (programmable logic controller), and manual and automatic switching can be conveniently carried out.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of a combined state of a wall-attached supporting seat, a guide rail, a limiting assembly, a first lifting cylinder and a second lifting cylinder of the alternate lifting hydraulic climbing frame control system and the control method of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
FIG. 4 is a perspective view of a limiting assembly of the alternate lifting hydraulic climbing frame control system and method of the present invention;
FIG. 5 is a front view, in half section, of a limiting assembly of the alternate elevation hydraulic climbing rack control system and control method of the present invention;
FIG. 6 is a perspective view of a wall-attached support seat of the alternate lifting hydraulic climbing rack control system and control method of the present invention;
FIG. 7 is a front view of a wall-attached support seat of the alternate lifting hydraulic climbing rack control system and control method of the present invention;
FIG. 8 is a front view, in half section, of a wall-attached support seat of the alternate elevation hydraulic climbing rack control system and control method of the present invention;
fig. 9 is a schematic view of an oil path system of an alternate lifting hydraulic climbing frame control system and method of the present invention;
fig. 10 is a schematic pipeline diagram of a hydraulic lock assembly, a first lift cylinder, a second lift cylinder, a rod-side solenoid valve and a rodless-side solenoid valve of the alternate lifting hydraulic climbing frame control system and method of the present invention;
fig. 11 is a schematic diagram of input contacts and output contacts of a PLC of the alternate lifting hydraulic climbing frame control system and control method of the present invention;
FIG. 12 is a schematic diagram of the wiring of part of the control system of the alternative lifting hydraulic climbing frame control system and the control method according to the present invention;
fig. 13 is a wiring diagram of a control system of a motor of a hydraulic pump of the alternative lifting hydraulic climbing frame control system and control method according to the present invention;
fig. 14 is a block diagram of the execution states of the first lift cylinder and the second lift cylinder in the rail lifting state of the alternate lifting hydraulic climbing frame control system and the control method according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The technical scheme of the invention is realized as follows: as shown in fig. 1 to 9, the present invention provides an alternate lifting hydraulic climbing rack control system, which comprises a plurality of wall-attached supporting seats 1, a guide rail 2, a limiting component 3, a plurality of first lift cylinders 4, a second lift cylinder 5, an oil tank 6, a plurality of hydraulic pumps 7, a protection solenoid valve 8 and a PLC; the wall-attached supporting seats 1 are arranged at intervals along the vertical or horizontal extending direction of the wall body and are respectively and fixedly connected with the wall body; each guide rail 2 is respectively connected with a plurality of vertically arranged wall-attached supporting seats 1 in a sliding manner along the vertical direction; the wall-attached supporting seat 1 limits the direction of the guide rail 2 moving along the wall body in one direction; the limiting assemblies 3 are arranged on the wall bodies on the two sides of the wall-attached supporting seat 1 in pairs and at intervals; the first lifting oil cylinder 4 and the second lifting oil cylinder 5 are respectively fixedly arranged at two sides of the guide rail 2, and the first lifting oil cylinder 4 or the second lifting oil cylinder 5 is also detachably connected with the limiting assembly 3 and drives the guide rail 2 to linearly move along the wall body; the limiting component 3 is matched with the wall-attached supporting seat 1 to limit the moving distance of the guide rail 2 on one hand, and on the other hand, the load of the guide rail 2 and accessories thereof can be unloaded to the wall body.
The oil tank 6 is communicated with the input end of each hydraulic pump 7, the output end of each hydraulic pump 7 is respectively communicated with the input end of a protection electromagnetic valve 8, and the output end of each protection electromagnetic valve 8 is selectively communicated with the first lifting oil cylinder 4 and the second lifting oil cylinder 5 which are arranged in pairs on two sides of a guide rail 2; the PLC is electrically connected with the hydraulic pump 7, the protection electromagnetic valve 8, the first lifting oil cylinder 4 and the second lifting oil cylinder 5; when the PLC drives the distance between the piston rod and the cylinder body of each first lifting oil cylinder 4 to change, the distance between the piston rod and the cylinder body of each second lifting oil cylinder 5 is kept unchanged or the direction of the distance between the piston rod and the cylinder body of each first lifting oil cylinder 4 is opposite to the changing direction of the distance between the piston rod and the cylinder body of each second lifting oil cylinder 5. The function of adjusting the position of the guide rail 2 is realized by adjusting the distance between the cylinder body of the first lifting oil cylinder 4 or the second lifting oil cylinder 5 and the piston rod thereof. In the process, the lifting cylinders are divided into two groups, namely when the piston rod of the lifting cylinder on one side of the guide rail extends out, the piston rod on the other side of the guide rail retracts or keeps a compressed state unchanged. The number of the protection electromagnetic valves 8 is four, each protection electromagnetic valve 8 corresponds to one first lifting oil cylinder 4 and one second lifting oil cylinder 5 on two sides of one guide rail 2 and one hydraulic pump 7, when the system is started, the protection electromagnetic valves 8 are not powered, hydraulic pipelines can form a loop, and the hydraulic pump 7 and a driving motor M thereof can be protected from being damaged after long-time operation.
As shown in fig. 9 and 11, the PLC includes a plurality of input contacts, an output contact, an oil cylinder rod cavity action button and an oil cylinder rodless cavity action button, and the input contacts of the PLC are electrically connected with the oil cylinder rod cavity action button and the oil cylinder rodless cavity action button, respectively; the output contact of the PLC is electrically connected with the coil of each protection electromagnetic valve 8 and the coil of each hydraulic pump 7; the oil cylinder rod cavity action button drives the hydraulic pump 7 to inject hydraulic oil into the rod cavity of the lifting oil cylinder on one side of the guide rail 2, and the oil cylinder rod cavity action button drives the hydraulic pump 7 to inject hydraulic oil into the rod cavity of the lifting oil cylinder on the other side of the guide rail 2, so that piston rods of the first lifting oil cylinder 4 and the second lifting oil cylinder 5 extend out or retract. Usually, a partition board is arranged in the cylinder body of the hydraulic cylinder, one side of the partition board is fixedly connected with the piston rod, meanwhile, the partition board divides the inner part of the cylinder body of the lifting cylinder into a rod cavity and a rodless cavity which are not communicated with each other, the rod cavity is a cavity body through which the piston rod passes, and the rodless cavity is a closed cavity body at the other side of the partition board. By injecting hydraulic oil into the rodless cavity and reducing the hydraulic oil in the rod cavity, the partition plate moves towards the rod cavity to drive the piston rod to extend out. The label prefixed by X in fig. 11 is the input contact; the labels prefixed by Y are the output contacts. As can be seen, the odd numbered cylinders are the first lift cylinders 4, and the even numbered cylinders are the second lift cylinders 5. The figure shows that four first lift cylinders 4, namely 1# cylinder, 3# cylinder, 5# cylinder and 7# cylinder, and four second lift cylinders 5, namely 2# cylinder, 4# cylinder, 6# cylinder and 8# cylinder are arranged, the number of lift cylinders used in practice can be increased or reduced in pairs as required, and the description is omitted here.
As shown in fig. 9 and 10, a hydraulic lock assembly 100, a rod-side solenoid valve 200, and a rodless-side solenoid valve 300 are provided on each of the first lift cylinder 4 and the second lift cylinder 5; the input end of the rod-side solenoid valve 200 or the rodless-side solenoid valve 300 is respectively communicated with the output end of the protection solenoid valve 8, and the output end of the rod-side solenoid valve 200 or the rodless-side solenoid valve 300 is respectively communicated with different oil inlet ports of the hydraulic lock assembly 100; the output end of the hydraulic lock assembly 100 is also selectively communicated with one end of each first lifting oil cylinder 4 or each second lifting oil cylinder 5, which is close to the piston rod, or one end of each first lifting oil cylinder 5, which is far away from the piston rod; the coils of the rod-side solenoid valve 200 and the rodless-side solenoid valve 300 are electrically connected to the output contacts of the PLC, respectively. The hydraulic lock assembly 100 can lock the circuit of the hydraulic oil, prevent the hydraulic oil from flowing, and can maintain the position when the first lift cylinder 4 or the second lift cylinder 5 bears the load. Hydraulic oil typically flows only in one direction within the hydraulic lock assembly 100. As can be seen from the illustration marks, the rod-side solenoid valve 200 of the 1# cylinder, i.e., the illustrated YV1, is communicated with the rod chamber of the 1# cylinder through the hydraulic lock assembly, and the rodless-side solenoid valve 300 of the 1# cylinder, i.e., the illustrated YV2, is communicated with the rodless chamber of the 1# cylinder through the hydraulic lock assembly; the rodless-side solenoid valve 300 of the # 2 cylinder, YV3 as shown, communicates with the rodless chamber of the # 2 cylinder through the hydraulic lock assembly 100, and the sensing-side solenoid valve 200 of the # 2 cylinder, YV4 as shown, communicates with the rod chamber of the # 2 cylinder through the hydraulic lock assembly 100. The first lift cylinder 4 and the second lift cylinder 5 which are arranged in pairs subsequently are also arranged according to this rule.
As shown in fig. 10, the specific structure of the hydraulic lock assembly is shown. The hydraulic lock assembly 100 comprises a first check valve 101 and a second check valve 102, wherein the input end of the first check valve 101 is communicated with the output end of a rod-side electromagnetic valve 200 of the first lifting oil cylinder 4 or the second lifting oil cylinder 5, the input end of the first check valve 101 is also communicated with the control end of the second check valve 102, and the output end of the first check valve 101 is communicated with a rod cavity of the first lifting oil cylinder 4 or the second lifting oil cylinder 5; the input end of the second one-way valve 102 is communicated with the output end of the rodless side electromagnetic valve of the first lifting oil cylinder 4 or the second lifting oil cylinder 5, the input end of the second one-way valve 102 is also communicated with the control end of the first one-way valve 101, and the output end of the second one-way valve 102 is communicated with the rodless cavity of the oil cylinder of the first lifting oil cylinder 4 or the second lifting oil cylinder 5; when the hydraulic climbing frame moves along the wall, the hydraulic pump 7 pumps oil to the first lifting cylinder 4 or the second lifting cylinder 5, and when hydraulic oil flows through the hydraulic lock assemblies 100 of the first lifting cylinder 4 and the second lifting cylinder 5, the hydraulic oil flow directions of the first check valve 101 or the second check valve 102 in the hydraulic lock assemblies 100 of two different lifting cylinders are opposite.
As further shown in fig. 9, in order to enable the PLC to obtain whether the extension or retraction length of each piston rod is accurate, a displacement encoder 400 is disposed on each of the first lift cylinder 4 and the second lift cylinder 5 or the hydraulic pump 7, and an output end of the displacement encoder 400 is electrically connected to an input contact of the PLC; the displacement encoder 400 takes the length signal of the piston rod extension or retraction and sends the length signal to the PLC. X0, X1, \ 8230 \ 8230;, X7 shown in fig. 11 correspond to the output signals of 8 encoders for a total of 8 input contacts. When the piston rods of the first lifting cylinders 4 extend or retract simultaneously, the input contact of the PLC can judge and verify the extending amount or retracting amount of the piston rod of each first lifting cylinder 4 according to the time when all or part of the contacts receive the limit position signal; the method for checking the extending amount of each piston of the second lifting oil cylinder 5 is the same.
As further shown in fig. 9, the output end of the first check valve 101 and the output end of the second check valve 102 of the hydraulic lock assembly 100 are further provided with a pressure transmitter 500, and the pressure transmitter 500 is electrically connected with the input contact of the PLC. The output signals of the pressure transmitter 500 are arranged in one-to-one correspondence with input contacts of the PLC, such as X14 and subsequent input contacts, but wiring contacts are not shown in the figure, and only output relay numbers corresponding to the pressure transmitter 500, such as J25, J26, J27, J28, J29, J30, J31, J32, and the like, are given. The pressure transmitter 500 may determine whether the pressure of the hydraulic oil inside each first lift cylinder 4 or second lift cylinder 5 of the extended or retracted piston rod is normal, whether the pipeline is depressurized, and whether the hydraulic lock assembly 100 leaks, by comparing the digitized oil pressure output signal with a preset threshold.
As shown in fig. 3 to 5, in order to limit and unload the piston rod of the lift cylinder, reliable passing performance is provided without causing interference. The limiting assembly 3 comprises an installation part 31, a propping part 32 and a limiting part 33, wherein the installation part 31 is fixedly arranged on a wall body, the installation part 31 extends outwards in the direction away from the wall body, one end of the installation part 31 away from the wall body is provided with the propping part 32 and the limiting part 33, one end of the propping part 32 is rotatably connected with the installation part 31, and the other end of the propping part 32 extends upwards in the direction away from the wall body in an inclined manner; the piston rod of the first lifting cylinder 4 or the second lifting cylinder 5 is abutted against the surface of the abutting part 32, and the piston rod of the first lifting cylinder 4 or the second lifting cylinder 5 also drives the abutting part 32 to rotate relative to the mounting part 31 and abuts against the surface of the limiting part 33; the center of gravity of the abutting portion 32 is disposed offset from the center of the hinge shaft of the abutting portion 32 and the mounting portion 31. When the abutting portion 32 is in a natural state, the center of gravity deviates from the hinge shaft, so the abutting portion 32 rotates counterclockwise, the end of the abutting portion 32 abuts against the surface of the limiting portion 33, when the piston rod of the first lift cylinder 4 or the second lift cylinder 5 vertically passes through the abutting portion 32 from bottom to top, the end of the piston rod can be provided with an extended hook, the hook can push the abutting portion 32 to rotate clockwise relative to the mounting portion 31, at this time, the piston rod can smoothly pass through the abutting portion 32, after the end of the piston rod passes through, the abutting portion 32 can rotate counterclockwise to reset without further abutting by the hook, at this time, the piston rod is lowered for a certain distance, so that the hook of the piston rod abuts against the abutting portion 32, and an unloading function is realized. When the extended piston rod needs to be lowered, the piston rod needs to be separated from the abutting portion 32, if the piston rod extends upwards for a certain distance, then the abutting portion 32 is shifted and rotates clockwise, so that the piston rod vertically descends and is located by the abutting portion 32, and then the abutting portion 32 is reset under the action of gravity.
As shown in fig. 2 combined with fig. 6-8, the wall-attached support seat 1 includes a wall-attached body 11, two wall-attached fasteners 12 and a ratchet assembly 13; the wall attaching body 11 is fixedly connected with a wall body, two wall attaching fasteners 12 are symmetrically arranged at one end of the wall attaching body 11 far away from the wall body, the two wall attaching fasteners 12 are opposite and arranged at intervals, clamping grooves are symmetrically arranged on the side surface of the guide rail 2, the two wall attaching fasteners 12 are respectively buckled in the clamping grooves, and a ratchet wheel assembly 13 is arranged at one end of the wall attaching body 11 close to the ground, and is connected with the surface of the clamping grooves in a sliding manner; the ratchet assembly 13 comprises a wall-attached thumb wheel 131, a ratchet body 132, an arc-shaped claw 133 and an elastic part 134; the wall-attached shifting wheel 131 is rotatably connected with the wall-attached body 11, a plurality of shifting teeth 135 are arranged on the surface of the wall-attached shifting wheel 131 at intervals, each shifting tooth 135 is arranged in central symmetry relative to the wall-attached shifting wheel 131, a plurality of limiting rods 21 are arranged on the surface of the guide rail 2 in the length extension direction at intervals, and the shifting teeth 135 are meshed with the limiting rods 21 on the guide rail 2; a ratchet body 132 is fixedly arranged at the end part of the rotating shaft of the wall-attached thumb wheel 131, an arc-shaped claw 133 is arranged on the wall-attached body 11, and the arc-shaped claw 133 is rotationally connected with the wall-attached body 11; one end of the elastic component 134 is fixedly connected with the wall-attached body 11, and the other end of the elastic component 134 is fixedly connected with the arc-shaped claw 133; the end of the arc-shaped pawl 133 selectively abuts against the toothed surfaces of the ratchet body 132 at different positions, so as to limit the unidirectional rotation direction of the wall-attached thumb wheel 131 or the ratchet body 132. When the guide rail 2 needs to ascend in a single direction, the arc-shaped claw 133 rotates clockwise and abuts against the surface of the ratchet wheel body 132, and at the moment, the wall-attached thumb wheel 131 and the ratchet wheel body 132 can only rotate clockwise, so that the one-way ascending motion of the guide rail 2 is corresponded; on the contrary, the arc-shaped pawl 133 rotates counterclockwise and abuts against the surface of the ratchet body 132, and at this time, the wall-attached thumb wheel 131 and the ratchet body 132 can only rotate counterclockwise, corresponding to the one-way descending movement of the guide rail 2.
Fig. 11 shows a wiring diagram of the output terminal of the PLC and the relay, when the coil of the corresponding relay J is powered on, the contact is closed, and the relay with the corresponding prefix J acts correspondingly, for example, J1 corresponds to the rodless side electromagnetic valve YV2 of the 1# oil cylinder; j2 corresponds to a rod-side electromagnetic valve YV1 of the 1# oil cylinder; j3 corresponds to a rodless side electromagnetic valve YV3 of the 2# oil cylinder; j4 corresponds to a rod-side electromagnetic valve YV4 of the 2# oil cylinder; j5 corresponds to the switching of the electrode M1 of the hydraulic pump motor 7; j6 corresponds to a 1# oil cylinder and a 2# oil cylinder sharing protective electromagnetic valve 8, namely YV0 in the figure; by analogy, four groups of electromagnetic valves are arranged, and the electromagnetic valves respectively correspond to the first lifting oil cylinder 4 and the second lifting oil cylinder 5 on two sides of the four groups of guide rails.
Fig. 12 shows the triggering conditions of the corresponding protection solenoid valve 8, rodless-side solenoid valve, and rod-side solenoid valve. Taking the protection solenoid valve YV0 shared by the 1# cylinder and the 2# cylinder as an example, when any one of the relays J6, J1, J2, J3, J4, J25, J26, J27, and J28 is powered on, the relay contact is closed, and the protection solenoid valve YV0 is operated and conducted. Similarly, when the coil of the relay J1 or J25 is electrified and the states of the relays J2 and J26 are not changed, the rodless side electromagnetic valve YV2 of the 1# oil cylinder acts and is conducted; when the coil of the relay J2 or J26 is powered on and the relay states of the J1 and J25 are kept unchanged, the rod-side electromagnetic valve YV1 of the 1# oil cylinder acts and is switched on, and so on, and the description is omitted here.
The following describes a control method of an alternate lifting hydraulic climbing frame control system according to the present invention with reference to fig. 9 to 13, and specifically includes the following steps:
s1: the alternate lifting type hydraulic climbing frame control system is configured, a plurality of wall-attached supporting seats 1 are arranged on a wall in an array mode, and a guide rail 2 extending vertically is connected with the wall-attached supporting seats 1 in a sliding mode respectively; limiting assemblies are correspondingly arranged on the wall bodies on the two sides of each wall-attached supporting seat 1; a first lifting oil cylinder 4 and a second lifting oil cylinder 5 are fixedly arranged on two sides of each guide rail 2; the end part of the piston rod of each lifting oil cylinder is hung on the surface of the propping part 32 of the limiting component 3 far away from the ground; the piston rods of the first lifting oil cylinder 4 and the second lifting oil cylinder 5 which are at the initial positions are all in a retraction state; as can be seen from fig. 13, at this time, each hydraulic pump 7 and its motors M1, M2, M3, and M4 are not powered on, and the PLC is powered on and standby.
S2: when the hydraulic climbing frame needs to be adjusted to rise upwards along the wall body, the wall-attached supporting seat 1 allows the guide rail 2 to pass upwards in one direction; pressing an oil cylinder rodless cavity action button, driving a hydraulic pump 7 by a PLC (programmable logic controller) to inject hydraulic oil into the rodless cavity of each first lifting oil cylinder 4 and keeping the pressure of the hydraulic oil in the rodless cavity unchanged, at the moment, positively conducting a second one-way valve 102 of a hydraulic lock assembly 100 of each first lifting oil cylinder 4, bearing the pressure of the rodless cavity of each first lifting oil cylinder 4 and outwards pushing out a piston rod, so that the piston rod upwards rises to a limit position along a wall body and reaches the abutting part 32 of the adjacent limiting assembly 3 above, and the end part of the piston rod in an extending state is hung on the abutting part 32 of the adjacent limiting assembly 3 above; in this process, the second lift cylinder 5 on the other side of each guide rail 2 does not act; in this state, each hydraulic pump 7 is powered on, the output end of the PLC powers on the relays KM1, KM2, KM3 and KM4, the protection solenoid valve 8 is opened, that is, the illustrated YV0, YV5, YV10 and YV15 are conducted, the rod-side solenoid valves YV1, YV6, YV11 and YV16 of each first lift cylinder 4 are conducted, hydraulic oil in the rod-side cavity of the first lift cylinder 4 is released, and the pressure in the cavity is reduced; certainly, the rodless side electromagnetic valve 300 of each first lift cylinder 4, that is, YV2, YV7, YV12 and YV17, can also be selectively turned on, the hydraulic pump 7 pumps the hydraulic oil in the oil tank 6 into the rodless cavities of each first lift cylinder 4, that is, the rodless cavities of the 1# cylinder, the 3# cylinder, the 5# cylinder and the 7# cylinder, so that the piston rod extends outwards and reaches the limit position, and after the extended piston rod reaches the limit position, the extended piston rod abuts against the limit component 3 adjacent to the upper wall body, the position of the piston rod is kept unchanged, and further operation is waited. The hydraulic lock assembly 100 of each first lift cylinder 4 maintains the position of the hydraulic oil, so that the extended piston rod bears the load.
S3: respectively starting a rod cavity action button and a rodless cavity action button of the first lifting oil cylinder 4 by taking the end part of the current piston rod of the first lifting oil cylinder 4 as a fulcrum, injecting hydraulic oil into the rod cavity of each first lifting oil cylinder 4 by the PLC driving the hydraulic pump 7, conducting the first one-way valve 101 of the hydraulic lock assembly 100 of the first lifting oil cylinder 4 in the forward direction, selectively opening the second one-way valve 102 by the hydraulic oil, conducting the second one-way valve 102 in the reverse direction, and refluxing the hydraulic oil in the rodless cavity to the oil tank 6; at the moment, the rod-side electromagnetic valves YV1, YV6, YV11 and YV16 of the first lift cylinders 4 are conducted, the first check valve 101 of the hydraulic lock assembly 100 of the first lift cylinder 4 conducts hydraulic oil forward and flows into the rod cavity through the first check valve 101, meanwhile, the hydraulic oil pressurizes the control end of the second check valve 102, so that the second check valve 102 conducts reversely, and the hydraulic oil flows back into the oil tank 6 from the rodless cavity of the first lift cylinder 4; at the moment, the piston rod of the first lifting oil cylinder 4 is taken as a fulcrum, and the cylinder body of the first lifting oil cylinder 4 moves towards the end part of the piston rod; along with the injection of the hydraulic oil, the rod cavity of the first lifting oil cylinder 4 is filled with the hydraulic oil and the pressure is kept, and at the moment, the cylinder body of the first lifting oil cylinder 4 drives the guide rail 2 and the second lifting oil cylinder 5 to vertically move upwards along the piston rod until the piston rod is completely retracted into the rod cavity;
in the process, the PLC also drives the hydraulic pump 7 to inject hydraulic oil into the rodless cavity of each second lifting oil cylinder 5, at the moment, the second one-way valve 102 of the hydraulic lock assembly 100 of the second lifting oil cylinder 5 is in forward conduction with the corresponding rodless cavity of the second lifting oil cylinder 5 to bear pressure and push out the piston rod outwards, so that the piston rod of the second lifting oil cylinder 5 reaches the abutting part 32 of the adjacent limiting assembly 3 above the piston rod, in the process, when the distance between the rod cavity of the first lifting oil cylinder 4 and the end part of the piston rod is reduced, the distance between the rod cavity of the second lifting oil cylinder 5 and the end part of the piston rod is increased, and the PLC judges the real-time position of each piston rod according to the input signal of the encoder; then, taking the end part of the piston rod extending out of the second lifting cylinder 5 as a fulcrum, injecting hydraulic oil into a rodless cavity of the second lifting cylinder 5, and discharging the hydraulic oil in a rod cavity of the second lifting cylinder 5, namely, the hydraulic lock assembly 100 of the second lifting cylinder 5 is provided with a first one-way valve 101 which is in forward conduction and a second one-way valve 102 which is in reverse conduction, a cylinder body of the second lifting cylinder 5 drives the guide rail 2 and the first lifting cylinder 4 to vertically lift upwards along the piston rod of the second lifting cylinder 5, at the moment, the second one-way valve 102 of the first lifting cylinder 4 is in forward conduction, the first one-way valve 101 is in reverse conduction, namely, the piston rod of the first lifting cylinder 4 extends out again, and the two piston rods alternately extend and retract, so that the waiting time of the lifting process is reduced; when the distance between the piston rod of the first lift cylinder 4 and the cylinder body is reduced, the rodless side electromagnetic valves YV3, YV8, YV13 and YV18 of the second lift cylinder 5 are all electrically conducted; the hydraulic pump 7 pumps hydraulic oil into a rodless cavity of the second lift cylinder 5 through the second one-way valve 102 of the hydraulic lock assembly 100 of the second lift cylinder 5, so that a piston rod of the second lift cylinder 5 extends outwards, namely the movement direction of the piston rod of the first lift cylinder 4 is opposite, when the piston rod of the first lift cylinder 4 retracts to the limit position, the piston rod of the second lift cylinder 5 correspondingly extends to the limit position, and the PLC acquires the current position of each piston rod through each displacement encoder 400;
when the hydraulic climbing frame rises to the position of the limiting component 3 with the designated height, the first lifting oil cylinder 4 and the second lifting oil cylinder 5 stop alternately stretching, the extended piston rods of the lifting oil cylinders all retract into the rod cavity, and the retracted or piston rods keep the current position unchanged, so that the rising process of the guide rail 2 is completed. FIG. 14 is a block diagram showing the operational execution relationship between the solenoid valves and the cylinders in the ascending state.
S4: similarly, when the hydraulic climbing frame needs to be adjusted to descend along the wall body, the wall-attached support base 1 allows the guide rail 2 to pass downwards in a single direction, the cylinder rod cavity action button and the rodless cavity action button are respectively started, the end of the piston rod of the second lifting cylinder 5 is separated from the limiting component 3 by taking the current hanging part of the end part of the piston rod of the first lifting cylinder 4 and the abutting part 32 of the limiting component 3 as a fulcrum, the second check valve 102 of the hydraulic lock component 100 of the first lifting cylinder 4 is conducted in the forward direction and the first check valve 101 is conducted in the reverse direction, hydraulic oil is injected into the rodless cavity of the first lifting cylinder 4, and the hydraulic oil in the rod cavity of the first lifting cylinder 4 is discharged, at the moment, the cylinder body of the first lifting cylinder 4, the guide rail 2 and the second lifting cylinder 5 vertically move downwards along the piston rod of the first lifting cylinder 4, the compression state of the piston rod of the second lifting cylinder 5 is maintained until the piston rod of the first lifting cylinder 4 extends out to the limit position, and the end part of the piston rod of the second lifting cylinder 5 abuts against the adjacent limiting component 32 below the abutting part 3; at this time, the end of the piston rod of each first lift cylinder 4 is used as a fulcrum, the rod-side electromagnetic valves YV1, YV6, YV11 and YV16 of each first lift cylinder 4 are conducted, and of course, the rodless-side electromagnetic valves YV2, YV7, YV12 and YV17 of each first lift cylinder 4 can be selectively conducted to discharge the rod-side cavity of each first lift cylinder 4 and selectively inject hydraulic oil into the rodless cavity of the first lift cylinder 4, so that the cylinder body of the first lift cylinder 4, the guide rail 2 and the second lift cylinder 5 integrally start to descend;
then, taking the end part of the piston rod of the current second lifting oil cylinder 5 as a fulcrum, removing the hanging relationship between the piston rod of the first lifting oil cylinder 4 and the limiting assembly, so that the second one-way valve 102 of the hydraulic lock assembly 100 of the second lifting oil cylinder 5 is conducted in the forward direction and the first one-way valve 101 is conducted in the reverse direction, at this time, the cylinder body of the second lifting oil cylinder 5, the guide rail 2 and the first lifting oil cylinder 4 vertically descend along the piston rod of the second lifting oil cylinder 5, meanwhile, the first one-way valve 101 of the hydraulic lock assembly 100 of the first lifting oil cylinder 4 is conducted in the forward direction and the second one-way valve 102 is conducted in the reverse direction, the piston rod of the first lifting oil cylinder 4 retracts and abuts against the abutting part 32 of the adjacent limiting assembly 3 below, and the PLC judges the real-time position of each piston rod according to the input signal of the encoder; the waiting time of the descending process is reduced by the process that piston rods of different lifting oil cylinders stretch out and draw back alternately; when the cylinder body of the first lift cylinder 4 integrally descends with the guide rail 2 and the second lift cylinder 5, the rodless side electromagnetic valves YV3, YV8, YV13 and YV18 of the second lift cylinder 5 are all electrified and conducted; the hydraulic pump 7 pumps the hydraulic oil into the rodless cavity of the second lift cylinder 5 through the second check valve 102 of the hydraulic lock assembly 100 of the second lift cylinder 5, so that the piston rod of the second lift cylinder 5 extends outwards, i.e. the movement direction of the piston rod of the first lift cylinder 4 is still kept opposite;
when the hydraulic climbing frame is lowered to the position of the limiting component 3 with the designated height, the first lifting oil cylinder 4 and the second lifting oil cylinder 5 stop alternately stretching, and the piston rod of each lifting oil cylinder retracts into the rod cavity.
The process of the alternate stretching is similar to that of a crawling ladder with two hands, and almost no waiting time is left in the motion process of the guide rail 2, so that the lifting efficiency of the guide rail is greatly improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. An alternate lifting type hydraulic climbing frame control system comprises a plurality of wall-attached supporting seats (1), a guide rail (2), a limiting assembly (3), a plurality of first lifting oil cylinders (4) and second lifting oil cylinders (5); the wall-attached supporting seats (1) are arranged at intervals along the vertical or horizontal extending direction of the wall body and are respectively and fixedly connected with the wall body; each guide rail (2) is connected with a plurality of vertically arranged wall-attached supporting seats (1) in a sliding manner along the vertical direction; the wall-attached supporting seat (1) limits the direction of the guide rail (2) moving along the wall body in a single direction; the limiting assemblies (3) are arranged on the wall bodies on the two sides of the wall-attached supporting seat (1) in pairs at intervals; the first lifting oil cylinder (4) and the second lifting oil cylinder (5) are respectively fixedly arranged on two sides of the guide rail (2), and the first lifting oil cylinder (4) or the second lifting oil cylinder (5) is also detachably connected with the limiting assembly (3) and drives the guide rail (2) to linearly move along a wall body;
the hydraulic lifting system is characterized by further comprising an oil tank (6), a plurality of hydraulic pumps (7), a protection electromagnetic valve (8) and a PLC, wherein the oil tank (6) is communicated with the input end of each hydraulic pump (7), the output end of each hydraulic pump (7) is respectively communicated with the input end of a protection electromagnetic valve (8), and the output end of each protection electromagnetic valve (8) is selectively communicated with a first lifting oil cylinder (4) and a second lifting oil cylinder (5) which are arranged on two sides of a guide rail (2) in pairs; the PLC is electrically connected with the hydraulic pump (7), the protection electromagnetic valve (8), the first lifting oil cylinder (4) and the second lifting oil cylinder (5); when the PLC drives the distance between the piston rod of each first lifting oil cylinder (4) and the cylinder body to change, the distance between the piston rod of each second lifting oil cylinder (5) and the cylinder body is kept unchanged or the direction of the distance between the piston rod of each first lifting oil cylinder (4) and the cylinder body is opposite to the changing direction;
the PLC comprises a plurality of input contacts, a plurality of output contacts, an oil cylinder rod cavity action button and an oil cylinder rodless cavity action button, and the input contacts of the PLC are respectively electrically connected with the oil cylinder rod cavity action button and the oil cylinder rodless cavity action button; the output contact of the PLC is electrically connected with the coil of each protection electromagnetic valve (8) and the coil of each hydraulic pump (7); the oil cylinder rod cavity action button drives the hydraulic pump (7) to inject hydraulic oil into the rod cavity of the lifting oil cylinder on one side of the guide rail (2), and the oil cylinder rod-free cavity action button drives the hydraulic pump (7) to inject hydraulic oil into the rod-free cavity of the lifting oil cylinder on the other side of the guide rail (2), so that piston rods of the first lifting oil cylinder (4) and the second lifting oil cylinder (5) extend out or retract;
each first lifting oil cylinder (4) and each second lifting oil cylinder (5) are respectively provided with a hydraulic lock assembly (100), a rod-side electromagnetic valve (200) and a rodless-side electromagnetic valve (300); the input end of the rod-side electromagnetic valve (200) or the rodless-side electromagnetic valve (300) is respectively communicated with the output end of the protection electromagnetic valve (8), and the output end of the rod-side electromagnetic valve (200) or the rodless-side electromagnetic valve (300) is respectively communicated with different oil inlet ports of the hydraulic lock assembly (100); the output end of the hydraulic lock assembly (100) is also selectively communicated with one end, close to the piston rod, of each first lifting oil cylinder (4) or one end, far away from the piston rod, of each second lifting oil cylinder (5); the coils of the rod-side electromagnetic valve (200) and the rodless-side electromagnetic valve (300) are respectively and electrically connected with the output contact of the PLC;
the hydraulic lock assembly (100) comprises a first one-way valve (101) and a second one-way valve (102), the input end of the first one-way valve (101) is communicated with the output end of a rod-side electromagnetic valve (200) of the first lifting oil cylinder (4) or the second lifting oil cylinder (5), the input end of the first one-way valve (101) is also communicated with the control end of the second one-way valve (102), and the output end of the first one-way valve (101) is communicated with a rod cavity of the oil cylinder of the first lifting oil cylinder (4) or the second lifting oil cylinder (5); the input end of a second one-way valve (102) is communicated with the output end of a rodless side electromagnetic valve of the first lifting oil cylinder (4) or the second lifting oil cylinder (5), the input end of the second one-way valve (102) is also communicated with the control end of the first one-way valve (101), and the output end of the second one-way valve (102) is communicated with a rodless cavity of the first lifting oil cylinder (4) or the second lifting oil cylinder (5); when the hydraulic climbing frame moves along a wall body, a hydraulic pump (7) pumps oil to a first lifting oil cylinder (4) or a second lifting oil cylinder (5), and when hydraulic oil flows through hydraulic lock assemblies (100) of the first lifting oil cylinder (4) and the second lifting oil cylinder (5), the hydraulic oil flow directions of first check valves (101) or second check valves (102) in different hydraulic lock assemblies (100) are opposite;
each first lifting oil cylinder (4) and each second lifting oil cylinder (5) or each hydraulic pump (7) are provided with a displacement encoder (400), and the output end of each displacement encoder (400) is electrically connected with the input contact of the PLC; the displacement encoder (400) acquires a length signal of the piston rod extending or retracting and sends the length signal to the PLC.
2. The alternate lifting hydraulic climbing control system according to claim 1, wherein the output end of the first check valve (101) and the output end of the second check valve (102) of the hydraulic lock assembly (100) are further provided with pressure transmitters (500), and the pressure transmitters (500) are electrically connected with input contacts of the PLC.
3. The alternate lifting hydraulic climbing rack control system according to claim 1, wherein the limiting assembly (3) comprises a mounting portion (31), a supporting portion (32) and a limiting portion (33), the mounting portion (31) is fixedly arranged on the wall, the mounting portion (31) extends outwards in the direction away from the wall, one end of the mounting portion (31) away from the wall is provided with the supporting portion (32) and the limiting portion (33), one end of the supporting portion (32) is rotatably connected with the mounting portion (31), and the other end of the supporting portion (32) extends upwards in an inclined manner in the direction away from the wall; a piston rod of the first lifting oil cylinder (4) or the second lifting oil cylinder (5) is abutted against the surface of the abutting part (32), and the piston rod of the first lifting oil cylinder (4) or the second lifting oil cylinder (5) also drives the abutting part (32) to rotate relative to the mounting part (31) and abuts against the surface of the limiting part (33); the center of gravity of the abutting portion (32) is offset from the center of a hinge shaft of the abutting portion (32) and the mounting portion (31).
4. The alternate lifting hydraulic climbing rack control system according to claim 1, wherein the wall-attached support base (1) comprises a wall-attached body (11), two wall-attached fasteners (12) and a ratchet assembly (13); the wall-attached body (11) is fixedly connected with a wall body, two wall-attached fasteners (12) are symmetrically arranged at one end, far away from the wall body, of the wall-attached body (11), the two wall-attached fasteners (12) are arranged oppositely and at intervals, clamping grooves are symmetrically arranged on the side surface of the guide rail (2), the two wall-attached fasteners (12) are respectively buckled in the clamping grooves, and a ratchet wheel component (13) is arranged at one end, close to the ground, of the wall-attached body (11) and is in sliding connection with the surface of the clamping grooves; the ratchet wheel assembly (13) comprises a wall-attached thumb wheel (131), a ratchet wheel body (132), an arc-shaped claw (133) and an elastic component (134); the wall-attached shifting wheel (131) is rotationally connected with the wall-attached body (11), a plurality of shifting teeth (135) are arranged on the surface of the wall-attached shifting wheel (131) at intervals, the shifting teeth (135) are arranged in central symmetry relative to the wall-attached shifting wheel (131), a plurality of limiting rods (21) are arranged on the surface of the guide rail (2) in the length extension direction at intervals, and the shifting teeth (135) are meshed with the limiting rods (21) on the guide rail (2); a ratchet body (132) is fixedly arranged at the end part of a rotating shaft of the wall-attached thumb wheel (131), an arc-shaped clamping jaw (133) is arranged on the wall-attached body (11), and the arc-shaped clamping jaw (133) is rotationally connected with the wall-attached body (11); one end of the elastic component (134) is fixedly connected with the wall-attached body (11), and the other end of the elastic component (134) is fixedly connected with the arc-shaped clamping jaw (133); the end parts of the arc-shaped claws (133) are selectively mutually abutted with the toothed surfaces at different positions of the ratchet body (132) to limit the unidirectional rotation direction of the wall-attached thumb wheel (131) or the ratchet body (132).
5. A control method of an alternate lifting type hydraulic climbing frame control system is characterized by comprising the following steps:
s1: the alternate lifting hydraulic climbing frame control system according to any one of claims 1 to 3 is configured, a plurality of wall-attached supporting seats (1) are arranged on a wall in an array manner, and a vertically extending guide rail (2) is respectively connected with the plurality of vertically arranged wall-attached supporting seats (1) in a sliding manner; limiting assemblies (3) are correspondingly arranged on the wall bodies on the two sides of each wall-attached supporting seat (1); a first lifting oil cylinder (4) and a second lifting oil cylinder (5) are fixedly arranged on two sides of each guide rail (2); the end part of the piston rod of each lifting oil cylinder is hung on the surface of the propping part (32) of the limiting component (3) far away from the ground; enabling piston rods of the first lifting oil cylinder (4) and the second lifting oil cylinder (5) which are at the initial positions to be in a retraction state;
s2: when the hydraulic climbing frame needs to be adjusted to rise upwards along the wall body, the wall-attached supporting seat (1) allows the guide rail (2) to pass upwards in one direction; pressing an oil cylinder rodless cavity action button, injecting hydraulic oil into a rodless cavity of each first lifting oil cylinder (4) by a PLC (programmable logic controller) driving hydraulic pump (7) and maintaining the pressure of the hydraulic oil in the rodless cavity unchanged, conducting a second one-way valve (102) of a hydraulic lock assembly (100) of each first lifting oil cylinder (4) in the forward direction at the moment, bearing the pressure of the rodless cavity of each first lifting oil cylinder (4) and pushing out a piston rod outwards, enabling the piston rod to upwards lift out to a limit position along a wall body and reach the abutting part (32) of the adjacent limiting assembly (3) above, and enabling the end part of the piston rod in the extending state to be hung on the abutting part (32) of the adjacent limiting assembly (3) above; in the process, the second lifting oil cylinder (5) on the other side of each guide rail (2) does not act;
s3: respectively starting a rod cavity action button and a rodless cavity action button of the oil cylinder by taking the end part of the current piston rod of the current first lifting oil cylinder (4) as a fulcrum, then driving a hydraulic pump (7) by a PLC (programmable logic controller) to inject hydraulic oil into the rod cavity of each first lifting oil cylinder (4), at the moment, conducting a first one-way valve (101) of a hydraulic lock assembly (100) of the first lifting oil cylinder (4) in the forward direction, selectively starting a second one-way valve (102) by the hydraulic oil, conducting the second one-way valve (102) in the reverse direction, and refluxing the hydraulic oil in the rodless cavity to an oil tank (6); along with the injection of hydraulic oil, a rod cavity of the first lifting oil cylinder (4) is filled with the hydraulic oil and pressure is kept, and at the moment, a cylinder body of the first lifting oil cylinder (4) drives the guide rail (2) and the second lifting oil cylinder (5) to vertically move upwards along the piston rod until the piston rod is completely retracted into the rod cavity; in the process, the PLC also drives the hydraulic pump (7) to inject hydraulic oil into the rodless cavity of each second lifting oil cylinder (5), at the moment, the second one-way valve (102) of the hydraulic lock assembly (100) of each second lifting oil cylinder (5) is in forward conduction with the rodless cavity of the corresponding second lifting oil cylinder (5) to bear pressure and push out the piston rod outwards, so that the piston rod of each second lifting oil cylinder (5) reaches the abutting part (32) of the adjacent limiting assembly (3) above, in the process, when the distance between the rod cavity of the first lifting oil cylinder (4) and the end part of the piston rod is reduced, the distance between the rod cavity of each second lifting oil cylinder (5) and the end part of the piston rod is increased, and the PLC judges the real-time position of each piston rod according to an input signal of the encoder; then, taking the end part of a piston rod extending out of the second lifting oil cylinder (5) as a fulcrum, injecting hydraulic oil into a rodless cavity of the second lifting oil cylinder (5), and discharging the hydraulic oil in a rod cavity of the second lifting oil cylinder (5), namely, a first one-way valve (101) of a hydraulic lock assembly (100) of the second lifting oil cylinder (5) is in forward conduction, a second one-way valve (102) is in reverse conduction, a cylinder body of the second lifting oil cylinder (5) drives a guide rail (2) and a first lifting oil cylinder (4) to vertically lift upwards along the piston rod of the second lifting oil cylinder (5), at the moment, the second one-way valve (102) of the first lifting oil cylinder (4) is in forward conduction, the first one-way valve (101) is in reverse conduction, namely, the piston rod of the first lifting oil cylinder (4) extends out again, and the two piston rods alternately stretch out and draw back, so that the waiting time of the lifting process is shortened; when the hydraulic climbing frame rises to the position of the limiting component (3) with the designated height, the first lifting oil cylinder (4) and the second lifting oil cylinder (5) stop alternately stretching, and the piston rod of each lifting oil cylinder retracts into the rod cavity;
s4: when the hydraulic climbing frame needs to be adjusted to descend downwards along a wall body, the wall-attached supporting seat (1) allows the guide rail (2) to pass downwards in a single direction, the oil cylinder rod cavity action button or the rodless cavity action button is started, the end part of the piston rod of the first lifting oil cylinder (4) and the hanging part of the abutting part (32) of the limiting component (3) are taken as a fulcrum, the end part of the piston rod of the second lifting oil cylinder (5) is separated from the limiting component (3), the second check valve (102) of the hydraulic lock component (100) of the first lifting oil cylinder (4) is conducted in the forward direction and the first check valve (101) is conducted in the reverse direction, hydraulic oil is injected into the rodless cavity of the first lifting oil cylinder (4), the hydraulic oil in the rod cavity of the first lifting oil cylinder (4) is discharged, at the moment, the cylinder body of the first lifting oil cylinder (4), the guide rail (2) and the second lifting oil cylinder (5) move downwards along the vertical direction of the piston rod of the first lifting oil cylinder (4), the second lifting oil cylinder (5) is maintained until the piston rod of the second lifting oil cylinder (4) abuts against the lower end part of the limiting oil cylinder (32), and the piston rod (3) of the lifting oil cylinder (4) extends out; then taking the end part of the piston rod of the current second lifting oil cylinder (5) as a fulcrum, releasing the hanging relationship between the piston rod of the first lifting oil cylinder (4) and the limiting assembly, enabling the second one-way valve (102) of the hydraulic lock assembly (100) of the second lifting oil cylinder (5) to be in forward conduction and the first one-way valve (101) to be in reverse conduction, enabling the cylinder body of the second lifting oil cylinder (5) to be in vertical descending along the piston rod of the second lifting oil cylinder (5) with the guide rail (2) and the first lifting oil cylinder (4), meanwhile, enabling the first one-way valve (101) of the hydraulic lock assembly (100) of the first lifting oil cylinder (4) to be in forward conduction and the second one-way valve (102) to be in reverse conduction, enabling the piston rod of the first lifting oil cylinder (4) to retract and abut against the abutting part (32) of the limiting assembly (3) adjacent to the lower part, and judging the real-time position of each piston rod by the PLC according to the input signal of the encoder; the waiting time of the descending process is reduced by the process that piston rods of different lifting oil cylinders stretch out and draw back alternately; when the hydraulic climbing frame is lowered to the position of the limiting assembly (3) with the designated height, the first lifting oil cylinder (4) and the second lifting oil cylinder (5) stop alternately stretching, and piston rods of the lifting oil cylinders all retract into the rod cavities.
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| CN202210909456.4A CN115143155B (en) | 2022-07-29 | 2022-07-29 | Alternate lifting type hydraulic climbing frame control system and control method |
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| CN103148051B (en) * | 2013-03-25 | 2016-03-30 | 长沙中联消防机械有限公司 | Hydraulic jack, comprise its hydraulic jack control system, engineering machinery |
| WO2016086027A1 (en) * | 2014-11-25 | 2016-06-02 | Actuant Corporation | Synchronized lifting and lowering apparatus and methods |
| CN206068935U (en) * | 2016-08-31 | 2017-04-05 | 中冶华天工程技术有限公司 | Replace lift positive stop |
| CN206268154U (en) * | 2016-12-15 | 2017-06-20 | 南京迈瑞生物医疗电子有限公司 | Hydraulic telescopic device, kidney rest arrangement and electric hydaulic operation table |
| CN110017019B (en) * | 2019-05-14 | 2024-03-01 | 中建海峡建设发展有限公司 | Hydraulic climbing formwork system and construction method thereof |
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