Box girder tensioning and lifting system

Abstract

The utility model discloses a box girder stretch-draw lifting system which comprises a base, a lifting platform, a hydraulic mechanism, a telescopic mechanism, an electric cabinet and an energy storage mechanism, the base and the lifting platform are oppositely arranged, the top of the telescopic mechanism is connected with the lifting platform, the bottom of the telescopic mechanism is connected with the base, and the hydraulic mechanism is arranged on the base and hinged to the telescopic mechanism. The energy storage mechanism is arranged on one side of the base, connected with the hydraulic mechanism and used for releasing energy when the hydraulic mechanism pushes the telescopic mechanism to ascend and storing energy when the hydraulic mechanism pushes the telescopic mechanism to descend, and the electric control box is installed on the side wall of the base. According to the hydraulic system, the design mode that the hydraulic mechanism and the energy storage mechanism are connected is adopted, the first hydraulic control one-way valve and the second hydraulic control one-way valve which are reversely connected in series are arranged between the main cylinder of the hydraulic mechanism and the energy storage mechanism to control an oil way, and energy complementation and exchange between the hydraulic mechanism and the energy storage mechanism are achieved; supply pressure of a hydraulic pump in the hydraulic mechanism is reduced, and the purpose of reducing energy consumption of a hydraulic system is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic platform vehicle technical field especially is involved in a box girder tensioning lifting system. BACKGROUND

[0002] The lifting platform is a system ascending and descending along the vertical direction, and is applicable to indoor and outdoor high-altitude operation, meets the demand of modern building construction, bridge erection, large-scale equipment installation and other high-altitude operation, and the current hydraulic lifting platform selects the hydraulic system with large energy consumption, which is not conducive to the design concept of energy saving and environmental protection, therefore, a safe, efficient and energy-saving lifting platform needs to be designed. UTILITY MODEL CONTENTS

[0003] The utility model discloses a box girder tensioning lifting system, the hydraulic system of the utility model adopts the design mode that hydraulic mechanism and energy storage mechanism are connected, the flow direction of control oil way is set between the main cylinder of hydraulic mechanism and energy storage mechanism and is controlled by first hydraulic control check valve and second hydraulic control check valve of reverse series connection, realizes the energy complementary exchange between hydraulic mechanism and energy storage mechanism, reduces the supply pressure of hydraulic pump in hydraulic mechanism, realizes the purpose of reducing the energy consumption of hydraulic system.

[0004] To realize above-mentioned purpose, the utility model adopts the technical scheme: a box girder tensioning lifting system, including base, lifting platform, hydraulic mechanism, telescopic mechanism, electric control box and energy storage mechanism, the base and lifting platform are opposite and set up, the top of telescopic mechanism is connected with lifting platform, the bottom of telescopic mechanism is connected with base, the hydraulic mechanism is located on the base and is hinged with telescopic mechanism for pushing telescopic mechanism and realizing the ascending and descending of lifting platform, the energy storage mechanism is located on one side of base and is connected with hydraulic mechanism for releasing the energy stored when hydraulic mechanism pushes telescopic mechanism and realizes the ascending of lifting platform to hydraulic mechanism and storing the energy in hydraulic mechanism in energy storage mechanism when hydraulic mechanism pushes telescopic mechanism and realizes the descending of lifting platform, the electric control box is installed on the side wall of base.

[0005] Preferably, the hydraulic mechanism comprises a master cylinder, a first hydraulic control check valve, a second hydraulic control check valve, a first reversing valve, a first throttle valve, a third hydraulic control check valve, a hydraulic pump, a second reversing valve, a second throttle valve, an oil tank and a second selector valve, the master cylinder is provided with a first hydraulic rod, the first hydraulic rod moves up and down along the master cylinder, the inlet of the first hydraulic control check valve and the inlet of the second hydraulic control check valve are connected, the outlet of the second hydraulic control check valve is connected with the energy storage mechanism, the outlet of the first hydraulic control check valve is connected with the rodless cavity of the master cylinder, the second selector valve is connected with the connecting oil way of the first hydraulic control check valve and the second hydraulic control check valve, the A port of the first reversing valve is connected with the rod cavity of the master cylinder, the B port of the first reversing valve is connected with the energy storage mechanism, the T port of the first reversing valve is connected with the first throttle valve, the other side of the first throttle valve is connected with the outlet of the third hydraulic control check valve, the inlet of the third hydraulic control check valve is connected with the hydraulic pump, the P port of the first reversing valve is connected with the second reversing valve, and the second reversing valve is connected with the oil tank through the second throttle valve.

[0006] Preferably, the energy storage mechanism comprises a tank body and a second hydraulic rod, the second hydraulic rod moves up and down along the tank body, the rodless cavity of the tank body is connected with the outlet of the second hydraulic control check valve, and the rod cavity of the tank body is connected with the B port of the first reversing valve.

[0007] Preferably, the end of the first hydraulic cylinder in the master cylinder is hingedly connected with the telescopic mechanism, and the bottom of the master cylinder is hingedly connected with the base.

[0008] Preferably, the base is horizontally placed, both ends of the base in the width direction are provided with first sliding rails, and the first sliding rails are arranged along the length direction of the base; the lifting platform comprises a lifting plate and a guardrail, the bottom of the lifting plate is provided with second sliding rails, the second sliding rails are oppositely arranged with the first sliding rails and are of the same size, the top of the lifting plate is provided with mounting seats at four corner positions, and the guardrail is arranged along the periphery of the lifting plate, and the bottom of the guardrail is fastened and connected with the mounting seats.

[0009] Preferably, the telescopic mechanism comprises a hinge piece and a sliding piece, the hinge piece and the sliding piece are intersectingly arranged and hingedly connected at the intersection, the end of the hinge piece close to the base is hingedly connected with the base, the end of the hinge piece close to the lifting platform is hingedly connected with the lifting platform, the end of the sliding piece close to the base is slidingly connected with the first sliding rail, and the end of the sliding piece close to the lifting platform is slidingly connected with the second sliding rail; the hinge piece comprises a plurality of first connecting rods, the ends of the first connecting rods in the length direction are hingedly connected, the sliding piece comprises a plurality of second connecting rods, the ends of the second connecting rods in the length direction are hingedly connected, and the free end of the second connecting rod is provided with a sliding wheel.

[0010] Preferably, the electric control box comprises a box body, a controller and a power supply unit, the controller and the power supply unit are installed in the box body, the controller is connected with the hydraulic pump to control the hydraulic pump to work, and the power supply unit is electrically connected with the controller to supply power to the controller.

[0011] Preferably, the number of the telescopic mechanisms is multiple, and the multiple telescopic mechanisms are arranged at intervals along the width direction of the base, and the multiple telescopic mechanisms are connected through the connecting pieces.

[0012] Preferably, universal wheels are arranged at positions of four corners of the base.

[0013] Preferably, the first reversing valve is a three-position four-way reversing valve, and the second reversing valve is a two-position two-way reversing valve.

[0014] Preferably, an operation panel is arranged on the outer wall of the electric control box, and the operation panel is connected with the controller.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The hydraulic system adopts a design mode that the hydraulic mechanism and the energy storage mechanism are connected, first hydraulic control check valves and second hydraulic control check valves in reverse series are arranged between the main cylinder of the hydraulic mechanism and the energy storage mechanism to control the flow direction of the oil circuit, energy complementary exchange between the hydraulic mechanism and the energy storage mechanism is realized, the supply pressure of the hydraulic pump in the hydraulic mechanism is reduced, and the purpose of reducing the energy consumption of the hydraulic system is achieved.

[0017] 2. The second reversing valve is arranged on the hydraulic circuit, the second reversing valve realizes a protection function for the hydraulic system, the speed of the first hydraulic rod when ascending or descending is prevented from increasing sharply, and the safety of the lifting platform vehicle is improved.

[0018] 3. The hydraulic system is more flexible and safe compared with the prior art, greatly facilitates on-site construction, and effectively improves the construction efficiency and quality.

[0019] The utility model will be described in further detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a general structure schematic view of the utility model;

[0021] Fig. 2 It is a structure schematic view of the hydraulic mechanism of the utility model;

[0022] Fig. 3 It is a position relation schematic view of each part of the electric control box of the utility model.

[0023] MARKING OF THE DRAWINGS:

[0024] 1 - base; 2 - lifting platform; 3 - first slide rail;

[0025] 4 - second slide rail; 5 - sliding wheel; 6 - hydraulic mechanism;

[0026] 6-1 - first hydraulic rod; 6-2 - second hydraulic rod; 6-3 - main cylinder;

[0027] 6-4 - tank body; 6-5 - first hydraulic control check valve;

[0028] 6-6 - second hydraulic control check valve; 6-7 - first reversing valve;

[0029] 6-8 - first throttle valve; 6-9 - third hydraulic control check valve;

[0030] 6-10 - hydraulic pump; 6-11 - first overflow valve; 6-12 - first selector valve;

[0031] 6-13 - second overflow valve; 6-14 - second reversing valve; 6-15 - second throttle valve;

[0032] 6-16 - fourth hydraulic control check valve; 6-17 - fifth hydraulic control check valve;

[0033] 6-18 - oil tank; 6-19 - second selector valve;

[0034] 7 - telescopic mechanism; 8 - hinged piece; 9 - sliding piece;

[0035] 10 - electric control box; 11 - lifting plate; 12 - guardrail;

[0036] 13 - second connecting rod; 14 - box body; 15 - controller;

[0037] 16 - operation panel; 17 - power supply unit; 18 - first connecting rod;

[0038] 19 - energy storage mechanism. DETAILED DESCRIPTION

[0039] As Figs. 1 to 3The utility model discloses a box girder tension lifting system, including base 1, lifting platform 2, hydraulic mechanism 6, telescopic mechanism 7, electric cabinet 10 and energy storage mechanism 19, base 1 and lifting platform 2 are set up to each other, the top of telescopic mechanism 7 is connected with lifting platform 2, the bottom of telescopic mechanism 7 is connected with base 1, hydraulic mechanism 6 is located on base 1 and is hinged with telescopic mechanism 7 for pushing telescopic mechanism 7 and realizes the rising and lowering of lifting platform 2, energy storage mechanism 19 is located on one side of base 1 and is connected with hydraulic mechanism 6 for releasing the energy storage when hydraulic mechanism 6 pushes telescopic mechanism 7 and realizes the rising of lifting platform 2 to hydraulic mechanism 6 and in hydraulic mechanism 6 pushes telescopic mechanism 7 and realizes the lowering of lifting platform 2 to store the energy in energy storage mechanism 19 in hydraulic mechanism 6, electric cabinet 10 is installed on the side wall of base 1.

[0040] In the embodiment, base 1 is horizontally placed, telescopic mechanism 7 supports lifting platform 2 upward, hydraulic mechanism 6 pushes telescopic mechanism 7 to stretch upward or contract downward, which facilitates telescopic mechanism 7 to push lifting platform 2 to move upward or downward, hydraulic mechanism 6 works through electric cabinet 10, hydraulic mechanism 6 is connected with energy storage mechanism 19, which facilitates energy storage mechanism 19 to store energy when telescopic mechanism 7 is driven by hydraulic mechanism 6 to descend, and energy storage mechanism 19 releases energy to push hydraulic mechanism 6 to ascend when telescopic mechanism 7 is driven by hydraulic mechanism 6 to ascend, thereby reducing energy loss of hydraulic mechanism 6 and achieving the purpose of reducing energy consumption.

[0041] Hydraulic mechanism 6 includes main cylinder 6-3, first hydraulic control check valve 6-5, second hydraulic control check valve 6-6, first reversing valve 6-7, first throttle valve 6-8, third hydraulic control check valve 6-9, hydraulic pump 6-10, second reversing valve 6-14, second throttle valve 6-15, oil tank 6-18 and second selection valve 6-19, first hydraulic rod 6-1 is arranged in main cylinder 6-3, first hydraulic rod 6-1 moves up and down along main cylinder 6-3, the inlet of first hydraulic control check valve 6-5 and the inlet of second hydraulic control check valve 6-6 are connected, the outlet of second hydraulic control check valve 6-6 is connected with energy storage mechanism 19, the outlet of first hydraulic control check valve 6-5 is connected with the rodless cavity of main cylinder 6-3, second selection valve 6-19 is connected with the connecting oil way of first hydraulic control check valve 6-5 and second hydraulic control check valve 6-6, the A port of first reversing valve 6-7 is connected with the rod cavity of main cylinder 6-3, the B port of first reversing valve 6-7 is connected with energy storage mechanism 19, the T port of first reversing valve 6-7 is connected with first throttle valve 6-8, the other side of first throttle valve 6-8 is connected with the outlet of third hydraulic control check valve 6-9, the inlet of third hydraulic control check valve 6-9 is connected with hydraulic pump 6-10, the P port of first reversing valve 6-7 is connected with second reversing valve 6-14, second reversing valve 6-14 is connected with oil tank 6-18 through second throttle valve 6-15.

[0042] The energy storage mechanism 19 comprises a tank 6-4 and a second hydraulic rod 6-2 which moves up and down along the tank 6-4, the rodless cavity of the tank 6-4 is connected with the outlet of the second hydraulic control check valve 6-6, and the rod cavity of the tank 6-4 is connected with the B port of the first reversing valve 6-7.

[0043] In the embodiment, the hydraulic mechanism 6 and the energy storage mechanism 19 cooperate to realize the lifting and lowering of the lifting platform 2, the hydraulic oil in the rodless cavity of the main cylinder 6-3 and the hydraulic oil in the rodless cavity of the tank 6-4 form a complementary relationship, the complementary exchange of the hydraulic oil between the main cylinder 6-3 and the tank 6-4 realizes the complementary exchange of energy between the main cylinder 6-3 and the tank 6-4, reduces the supply pressure of the hydraulic pump 6-10, and achieves the purpose of reducing energy consumption; the first reversing valve 6-7 is used to control the movement direction of the main cylinder 6-3 and the tank 6-4, if the first hydraulic rod 6-1 in the main cylinder 6-3 is to be lifted, the left electromagnetic valve of the first reversing valve 6-7 is powered on, the right position works, the hydraulic oil discharged by the hydraulic pump 6-10 passes through the third hydraulic control check valve 6-9, the first throttle valve 6-8 and the B port of the first reversing valve 6-7, and then is supplied to the rod cavity of the tank 6-4, at this time, the second selection valve 6-19 controls the second hydraulic control check valve 6-6 and the first hydraulic control check valve 6-5 to open, so that the hydraulic oil in the rodless cavity of the tank 6-4 flows into the rodless cavity of the main cylinder 6-3 through the second hydraulic control check valve 6-6 and the first hydraulic control check valve 6-5, and the hydraulic oil in the rod cavity of the main cylinder 6-3 flows back to the oil tank 18 through the A port and the P port of the first reversing valve 6-7, the second reversing valve 6-14 and the second throttle valve 6-15, the second hydraulic rod 6-2 moves downward along the tank 6-4, and the first hydraulic rod 6-1 of the main cylinder 6-3 moves upward; if the first hydraulic rod 6-1 in the main cylinder 6-3 is to be lowered, the right electromagnetic valve of the first reversing valve 6-7 is powered on, the left position works, the hydraulic oil discharged by the hydraulic pump 6-10 passes through the third hydraulic control check valve 6-9, the first throttle valve 6-8 and the T port and the A port of the first reversing valve 6-7, and then is supplied to the rod cavity of the main cylinder 6-3, at this time, the second selection valve 6-19 controls the first hydraulic control check valve 6-5 and the second hydraulic control check valve 6-6 to open, so that the hydraulic oil in the rodless cavity of the main cylinder 6-3 flows into the rodless cavity of the tank 6-4 through the first hydraulic control check valve 6-5 and the second hydraulic control check valve 6-6, and the hydraulic oil in the rod cavity of the tank 6-4 flows back to the oil tank 6-18 through the A port and the P port of the first reversing valve 6-7, the second reversing valve 6-14 and the second throttle valve 6-15, so that the first hydraulic rod 6-1 is lowered, and the second hydraulic rod 6-2 is lifted; through the design of the main cylinder 6-3 and the tank 6-4, when the first hydraulic rod 6-1 realizes lifting and lowering, the potential energy between the main cylinder 6-3 and the tank 6-4 can be transmitted, so that the energy between the main cylinder 6-3 and the tank 6-4 is complementary, the supply pressure of the hydraulic pump 6-10 is reduced, and the purpose of reducing energy consumption is achieved.

[0044] Further, the second reversing valve 6-14 protects the hydraulic system. If the pressure carried by the first hydraulic rod 6-1 is too small when the first hydraulic rod 6-1 rises or the pressure carried by the first hydraulic rod 6-1 is too large when the first hydraulic rod 6-1 falls, the second reversing valve 6-14 can cut off the oil path between the main cylinder 6-3 or the tank 6-4 and the oil tank 6-18, so as to avoid the rapid increase of the rising or falling speed, and improve the safety of the lifting platform vehicle.

[0045] In the embodiment, the energy storage mechanism 19 is a tank, and the energy storage mechanism 19 is placed on one side of the base 1. When the first hydraulic rod 6-1 pushes the telescopic mechanism 7 to rise, the left electromagnetic valve of the first reversing valve 6-7 is electrified, and the right position works. The hydraulic oil discharged by the hydraulic pump 6-10 passes through the third hydraulic control check valve 6-9, the first throttle valve 6-8 and the first reversing valve 6-7, and then is supplied to the rod cavity of the tank 6-4. The second hydraulic rod 6-2 moves downward along the height direction of the tank 6-4. The second hydraulic control check valve 6-6 and the first hydraulic control check valve 6-5 are opened. The hydraulic oil in the rodless cavity of the tank 6-4 flows into the rodless cavity of the main cylinder 6-3 through the second hydraulic control check valve 6-6 and the first hydraulic control check valve 6-5, so as to push the first hydraulic rod 6-1 to move upward, realize the energy exchange between the energy storage mechanism 19 and the hydraulic mechanism 6, reduce the supply pressure of the hydraulic pump 6-10, and reduce the system energy consumption. If the first hydraulic rod 6-1 drives the telescopic mechanism 7 to fall, the right electromagnetic valve of the first reversing valve 6-7 is electrified, and the left position works. The hydraulic oil discharged by the hydraulic pump 6-10 passes through the third hydraulic control check valve 6-9, the first throttle valve 6-8 and the first reversing valve 6-7, and then is supplied to the rod cavity of the main cylinder 6-3. The first hydraulic control check valve 6-5 and the second hydraulic control check valve 6-6 are opened. The hydraulic oil in the rodless cavity of the main cylinder 6-3 flows into the tank 6-4, so as to push the second hydraulic rod 6-2 to move upward, realize the energy exchange between the hydraulic mechanism 6 and the energy storage mechanism 19, avoid the rapid increase of the falling speed of the first hydraulic rod 6-1, and improve the safety of the lifting platform.

[0046] In another possible embodiment, different from the above-mentioned embodiment, the energy storage mechanism 19 is a counterweight, the weight of the counterweight is adjustable, and the energy exchange between the energy storage mechanism 19 and the hydraulic mechanism 6 is realized by the counterweight, so as to reduce the system energy consumption.

[0047] The end of the first hydraulic cylinder 6-1 in the main cylinder 6-3 is hinged to the telescopic mechanism 7, and the bottom of the main cylinder 6-3 is hinged to the base 1.

[0048] In the embodiment, the bottom of the main cylinder 6-3 is hinged to the base 1, and the end of the first hydraulic cylinder 6-1 is hinged to the telescopic mechanism 7, so as to facilitate the synchronous rising or falling of the telescopic mechanism 7 when the first hydraulic cylinder 6-1 rises or falls.

[0049] The base 1 is horizontally placed, both ends of the base 1 along the width direction are provided with first sliding rails 3, the first sliding rails 3 are arranged along the length direction of the base 1; the lifting platform 2 comprises a lifting plate 11 and a guardrail 12, the bottom of the lifting plate 11 is provided with second sliding rails 4, the second sliding rails 4 are oppositely arranged with the first sliding rails 3 and are the same size, the top of the lifting plate 11 is provided with mounting seats at four corner positions, the guardrail 12 is arranged along the periphery of the lifting plate 11, and the bottom of the guardrail 12 is fastened and connected with the mounting seat.

[0050] In the embodiment, the lifting plate 11 is oppositely arranged with the base 1, the telescopic mechanism 7 is arranged between the lifting plate 11 and the base 1, the end of the first sliding rail 3 and the second sliding rail 4 along the length direction is provided with a clamping part, the telescopic mechanism 7 is prevented from slipping off, two mounting seats are arranged on each edge of the lifting plate 11, each mounting seat is arranged at the end of the lifting plate 11 along the length or width direction, the number of the guardrail 12 is four, the four guardrails 12 are all perpendicular to the lifting plate 11, the bottom of each guardrail 12 is fastened and connected with the mounting seat, and the safety of the operating personnel is improved.

[0051] Further, different from the above embodiment, at least one of the four guardrails 12 is provided with a safety door for facilitating the operating personnel to enter and exit, the safety door can be locked with the guardrail 12 after the operating personnel enters the lifting plate 11, and accidents caused by automatic opening and closing of the safety door are avoided.

[0052] In a possible embodiment, an emergency stop button is arranged on the lifting plate 11, and the emergency stop button is used to stop the lifting plate 11 from rising or falling when the operating personnel works on the lifting plate 11.

[0053] In another possible embodiment, an alarm button is arranged on the lifting plate 11, and an emergency alarm is realized through the alarm button, so that accidents are avoided.

[0054] The telescopic mechanism 7 comprises a hinged piece 8 and a sliding piece 9, the hinged piece 8 is arranged to intersect with the sliding piece 9 and is hinged at the intersection, the end of the hinged piece 8 close to the base 1 is hinged with the base 1, the end of the hinged piece 8 close to the lifting platform 2 is hinged with the lifting platform 2, the end of the sliding piece 9 close to the base 1 is slidably connected with the first sliding rail 3, and the end of the sliding piece 9 close to the lifting platform 2 is slidably connected with the second sliding rail 4.

[0055] In the embodiment, the two ends of the hinged piece 8 are respectively hinged with the base 1 and the lifting plate 11, and the two ends of the sliding piece 9 are respectively slidably arranged in the first sliding rail 3 and the second sliding rail 4, the end of the sliding piece 9 is slid in the first sliding rail 3 and the second sliding rail 4 to push the lifting plate 11 to rise or fall.

[0056] The hinge 8 comprises a plurality of first connecting rods 18, the ends of which are hingedly connected along the length direction, and the sliding member 9 comprises a plurality of second connecting rods 13, the ends of which are hingedly connected along the length direction, and the free ends of the second connecting rods 13 are provided with sliding wheels 5.

[0057] In the embodiment, the first connecting rods 18 and the second connecting rods 13 have the same length, the number of the first connecting rods 18 is two, the ends of the two first connecting rods 18 are hingedly connected along the length direction, the lifting plate 11 is provided with a first hinged seat at the end away from the second sliding rail 4 along the length direction, the bottom plate 1 is provided with a second hinged seat at the end away from the first sliding rail 3 along the length direction, the ends away from each other of the two first connecting rods 18 are hingedly connected with the first hinged seat and the second hinged seat respectively, the number of the second connecting rods 13 is two, the ends of the two second connecting rods 13 are hingedly connected along the length direction, and the ends away from each other of the two second connecting rods 13 are provided with the sliding wheels 5, the two sliding wheels 5 are respectively embedded in the first sliding rail 3 and the second sliding rail 4, and the sliding wheels 5 slide along the first sliding rail 3 and the second sliding rail 4, when the first hydraulic rod 6-1 of the hydraulic mechanism 6 is lowered, the sliding wheel 5 on the first sliding rail 3 moves away from the second hinged seat, and the sliding wheel 5 on the second sliding rail 4 moves away from the first hinged seat, since the two second connecting rods 13 are hingedly connected, the two sliding wheels 5 are close to each other, the first hinged seat and the second hinged seat are synchronously close to each other to drive the lifting plate 11 to move downward, if the first hydraulic rod 6-1 of the hydraulic mechanism 6 is raised, the sliding wheel 5 on the first sliding rail 3 moves close to the second hinged seat, and the sliding wheel 5 on the second sliding rail 4 moves close to the first hinged seat, since the two second connecting rods 13 are hingedly connected, the two sliding wheels 5 are away from each other, the first hinged seat and the second hinged seat are synchronously away from each other to drive the lifting plate 11 to move upward, so as to realize the lifting and lowering of the lifting plate 11.

[0058] Further, according to the construction condition, the number of the first connecting rods 18 and the second connecting rods 13 of the telescopic mechanism 7 can be three, four or five, the number of the first connecting rods 18 and the second connecting rods 13 is not limited, and the first connecting rods 18 and the second connecting rods 13 keep the same length and number.

[0059] The electric control box 10 comprises a box body 14, a controller 15 and a power supply unit 17, the controller 15 and the power supply unit 17 are both installed in the box body 14, the controller 15 is connected with the hydraulic pump 6-10 to control the work of the hydraulic pump 6-10, and the power supply unit 17 is electrically connected with the controller 15 to supply power to the controller 15.

[0060] In this embodiment, the controller 15 controls the lifting plate 11 to rise, and the controller 15 sends a rising instruction to the hydraulic pump 6-10, the hydraulic pump 6-10 discharges hydraulic oil to the rod cavity of the tank 6-4 through the third hydraulic control check valve 6-9, the first throttle valve 6-8 and the first reversing valve 6-7, at this time, the second hydraulic control check valve 6-6 and the first hydraulic control check valve 6-5 are opened, so that the hydraulic oil in the rodless cavity of the tank 6-4 flows into the rodless cavity of the master cylinder 6-3 through the second hydraulic control check valve 6-6 and the first hydraulic control check valve 6-5, while the hydraulic oil in the rod cavity of the master cylinder 6-3 flows back to the oil tank 18 through the first reversing valve 6-7, the second reversing valve 6-14 and the second throttle valve 6-15, so that the first hydraulic rod 6-1 of the master cylinder 6-3 rises, and the lifting plate 11 rises; the controller 15 controls the lifting plate 11 to descend, and the controller 15 sends a descending instruction to the hydraulic pump 6-10, the hydraulic pump 6-10 discharges hydraulic oil to the rod cavity of the master cylinder 6-3 through the third hydraulic control check valve 6-9, the first throttle valve 6-8 and the first reversing valve 6-7, at this time, the first hydraulic control check valve 6-5 and the second hydraulic control check valve 6-6 are opened, so that the hydraulic oil in the rodless cavity of the master cylinder 6-3 flows into the rodless cavity of the tank 6-4 through the first hydraulic control check valve 6-5 and the second hydraulic control check valve 6-6, while the hydraulic oil in the rod cavity of the tank 6-4 flows back to the oil tank 6-18 through the first reversing valve 6-7, the second reversing valve 6-14 and the second throttle valve 6-15, so that the first hydraulic rod 6-1 descends, the first hydraulic rod 6-1 is hinged to the telescopic mechanism 7, so that the rising and descending of the first hydraulic rod 6-1 is the rising and descending of the telescopic mechanism 7, and since the top of the telescopic mechanism 7 is connected with the lifting plate 11, the rising and descending of the telescopic mechanism 7 can realize the rising and descending of the lifting plate 11. The controller 15 is a PLC controller, and the power supply unit 17 is a rechargeable battery.

[0061] Further, the lifting plate 11 is provided with pressure sensors, limit sensors and inclination sensors, the pressure sensors, the limit sensors and the inclination sensors are connected with the controller 15, the number of the pressure sensors and the inclination sensors is multiple, the multiple pressure sensors are uniformly distributed on the top of the lifting plate 11, so as to detect the load on the lifting plate 11 and transmit the load to the controller 15, and the controller 15 determines whether to control the hydraulic pump 6-10 to continue working based on the load data transmitted by the pressure sensors; the multiple inclination sensors are arranged at intervals along the side wall of the lifting plate 11, so as to detect the inclination degree of the lifting plate 11, avoid accidents caused by the surface inclination of the lifting plate 11 after rising to the target height, and transmit the detected data to the controller 15, and the controller 15 judges whether the hydraulic pump 6-10 continues to work based on the received inclination data, and the limit sensor is installed on the side wall of the lifting plate 11 to detect the height of the lifting plate 11 and avoid the rising height of the lifting plate 11 exceeding the preset height.

[0062] The plurality of telescopic mechanisms 7 are arranged at intervals along the width direction of the base 1 and are connected by a connecting piece.

[0063] In this embodiment, in order to improve the stability of the lifting platform vehicle, two telescopic mechanisms 7 are arranged at intervals along the width direction of the base 1, the two telescopic mechanisms 7 are connected by a connecting piece at the hinged position of the first connecting rod 18 and the second connecting rod 9, the first hydraulic rod 6-1 is connected to the connecting piece through a bearing, and the bearing is installed at the middle part of the connecting piece, so as to facilitate the synchronous lifting or lowering of the two telescopic mechanisms 7 on both sides by the first hydraulic rod 6-1.

[0064] Universal wheels are arranged at the four corners of the base 1.

[0065] In this embodiment, the universal wheels arranged at the four corners of the base 1 facilitate the movement of the lifting platform vehicle and improve the convenience of the lifting platform vehicle.

[0066] The first reversing valve 6-7 is a three-position four-way reversing valve, and the second reversing valve 6-14 is a two-position two-way reversing valve.

[0067] An operation panel 16 is arranged on the outer wall of the electric control box 10, and the operation panel 16 is connected to the controller 15.

[0068] A plurality of buttons are arranged on the operation panel 16, and the controller 15 can control the hydraulic pump 6-10 through the operation panel 16.

[0069] The above is only a preferred embodiment of the present application, and does not limit the present application. Any simple modification, change and equivalent structure change according to the technical essence of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A box girder tensioning lift system, characterized by: The utility model provides a kind of lifting platform, including base (1), lifting platform (2), hydraulic mechanism (6), telescopic mechanism (7), electric control box (10) and energy storage mechanism (19), the base (1) and lifting platform (2) are oppositely arranged, the top of telescopic mechanism (7) is connected with lifting platform (2), the bottom of telescopic mechanism (7) is connected with base (1), hydraulic mechanism (6) is located on base (1) and is hinged with telescopic mechanism (7) for pushing telescopic mechanism (7) to realize the rising and lowering of lifting platform (2), energy storage mechanism (19) is located on the side of base (1) and is connected with hydraulic mechanism (6) for when hydraulic mechanism (6) pushes telescopic mechanism (7) to realize the rising of lifting platform (2) the energy stored is released to hydraulic mechanism (6) and in hydraulic mechanism (6) pushes telescopic mechanism (7) to realize the lowering of lifting platform (2) the energy in hydraulic mechanism (6) is stored in energy storage mechanism (19), electric control box (10) is installed on the side wall of base (1).

2. A box girder tension launching system as claimed in claim 1, wherein: The hydraulic mechanism (6) includes a main cylinder (6-3), a first hydraulic control check valve (6-5), a second hydraulic control check valve (6-6), a first reversing valve (6-7), a first throttle valve (6-8), a third hydraulic control check valve (6-9), a hydraulic pump (6-10), a second reversing valve (6-14), a second throttle valve (6-15), an oil tank (6-18), and a second selection valve (6-19). The main cylinder (6-3) is provided with a first hydraulic rod (6-1) inside. The first hydraulic rod (6-1) moves up and down along the main cylinder (6-3). The inlet of the first hydraulic control check valve (6-5) is connected with the inlet of the second hydraulic control check valve (6-6). The outlet of the second hydraulic control check valve (6-6) is connected with the energy storage mechanism (19). The outlet of the first hydraulic control check valve (6-5) is connected with the rodless cavity of the main cylinder (6-3). The second selection valve (6-19) is connected with the connection oil way of the first hydraulic control check valve (6-5) and the second hydraulic control check valve (6-6). The A port of the first reversing valve (6-7) is connected with the rod cavity of the main cylinder (6-3). The B port of the first reversing valve (6-7) is connected with the energy storage mechanism (19). The T port of the first reversing valve (6-7) is connected with the first throttle valve (6-8). The other side of the first throttle valve (6-8) is connected with the outlet of the third hydraulic control check valve (6-9). The inlet of the third hydraulic control check valve (6-9) is connected with the hydraulic pump (6-10). The P port of the first reversing valve (6-7) is connected with the second reversing valve (6-14). The second reversing valve (6-14) is connected with the oil tank (6-18) through the second throttle valve (6-15).

3. A box girder tension launching system as claimed in claim 2, wherein: The energy storage mechanism (19) includes a tank body (6-4) and a second hydraulic rod (6-2). The second hydraulic rod (6-2) moves up and down along the tank body (6-4). The rodless cavity of the tank body (6-4) is connected with the outlet of the second hydraulic control check valve (6-6). The rod cavity of the tank body (6-4) is connected with the B port of the first reversing valve (6-7).

4. A box girder tension launching system as claimed in claim 2, wherein: The end of the first hydraulic rod (6-1) in the main cylinder (6-3) is hingedly connected with the telescopic mechanism (7), and the bottom of the main cylinder (6-3) is hingedly connected with the base (1).

5. A box girder tension launching system as claimed in claim 1, wherein: The base (1) is horizontally placed, and the base (1) is provided with first sliding rails (3) at both ends in the width direction. The lifting platform (2) comprises a lifting plate (11) and a guardrail (12), the bottom of the lifting plate (11) is provided with second sliding rails (4), the second sliding rails (4) are oppositely arranged with the first sliding rails (3) and have the same size, the top of the lifting plate (11) is provided with mounting seats at four corner positions, and the guardrail (12) is arranged along the periphery of the lifting plate (11), and the bottom of the guardrail (12) is tightly connected with the mounting seats.

6. A box girder tension launching system as claimed in claim 5 wherein: The telescopic mechanism (7) comprises a hinge piece (8) and a sliding piece (9), the hinge piece (8) and the sliding piece (9) are intersectingly arranged and hingedly connected at the intersection, the end of the hinge piece (8) close to the base (1) is hingedly connected with the base (1), the end of the hinge piece (8) close to the lifting platform (2) is hingedly connected with the lifting platform (2), the end of the sliding piece (9) close to the base (1) is slidingly connected with the first sliding rail (3), and the end of the sliding piece (9) close to the lifting platform (2) is slidingly connected with the second sliding rail (4). The hinge piece (8) comprises a plurality of first connecting rods (18), the ends of the first connecting rods (18) in the length direction are hingedly connected, the sliding piece (9) comprises a plurality of second connecting rods (13), the ends of the second connecting rods (13) in the length direction are hingedly connected, and the free end of the second connecting rod (13) is provided with a sliding wheel (5).

7. A box girder tension launching system as claimed in claim 1, wherein: The electric control box (10) comprises a box body (14), a controller (15) and a power supply unit (17), the controller (15) and the power supply unit (17) are both installed in the box body (14), the controller (15) is connected with the hydraulic pump (6-10) to control the working of the hydraulic pump (6-10), and the power supply unit (17) is electrically connected with the controller (15) to supply power to the controller (15).

8. A box girder tension launching system as claimed in claim 1, wherein: Universal wheels are arranged at four corner positions of the base (1).

9. A box girder tension launching system as claimed in claim 2, wherein: The first reversing valve (6-7) is a three-position four-way reversing valve, and the second reversing valve (6-14) is a two-position two-way reversing valve.

10. A box girder tension launching system as claimed in claim 7, wherein: An operation panel (16) is arranged on the outer wall of the electric control box (10), and the operation panel (16) is connected with the controller (15).

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