RU169343U1 - Emergency technical vehicle for repairing the contact network of trams and trolleybuses - Google Patents

Abstract

The inventive utility model relates to the field of vehicles equipped with lifting devices with an electrically insulated working platform and designed to service the contact networks of trams and trolleybuses, including routine, emergency repair and overhaul. The emergency technical vehicle for repairing the contact network of trams and trolleybuses consists of a car chassis with a two-row cab, a lifting device with a pantograph-type boom with an electrically insulated working platform and lateral displacement mechanism, outriggers, a hydraulic actuator drive system, a monitoring and control system, including a limiter maximum load, the main ladder lifting to the working platform, emergency telescopic ladder, emergency lowering device working platform rmy, technological and instrumental sections. The control and management system is equipped with an automatic device for blocking the lifting of the working platform above the regulated value set for movement with people on a raised platform, an automatic device for blocking the horizontal movement of the working platform when the outriggers are not exposed, an automatic device for blocking the movement of outriggers when the platform is raised, automatic locking device for lifting and shifting the working platform when tilting the frame of the lifting mustache trinity above the regulated value, by indicators of the transport position of the working platform and outriggers, the device of unauthorized use of lifting equipment,

Description

The inventive utility model relates to the field of vehicles equipped with lifting devices with an electrically insulated working platform and designed to service the contact networks of trams and trolleybuses, including routine, emergency repair and overhaul. The main purpose of this kind of machine is to transport the repair team with the necessary set of tools, fixtures and materials to the place of work and to raise the workers to a height for servicing the contact network elements.

Emergency technical vehicles are operated, as a rule, in large cities on the carriageway of city highways with extremely intense and dense traffic, increasing every year. This circumstance imposes the need to accelerate the implementation of repair and restoration work, in order to avoid creating obstacles to transport.

As a result, the psychological burden on the workforce is increasing and, as a consequence, the risk of the human factor affecting the safety of work is carried out, which should be taken into account in the designs of modern emergency technical vehicles.

When servicing the contact networks, emergency AP-7M elevators manufactured by the Novomoskovsk Machine-Building Plant are currently used (see website: www.rosintel.ru). The installation is mounted on the basis of the ZIL or KAMAZ chassis. The lifting mechanism of the mounting pad with articulated boom made in the form of two articulated joints. Each elbow represents a parallelogram equipped with two welded tubular frames with hinges at the ends. Transportation of the work crew is carried out in the kung, the actuators are driven by a hydraulic system. The horizontal movement of the working platform is due to its rotation.

The disadvantage of the machine is the lack of safety at the work site due to the lack of protective equipment for the working personnel and the machine from possible emergency situations when deviating from the technological work schedule.

The closest prototype of the claimed utility model may be an emergency technical vehicle ATM-0.5 / 7, manufactured by NPK RANKO, the technical solutions of which are protected by utility model patents No. 47821 (B66F 11/04 V, bulletin No. 25 dated 10.09. 2005) "Emergency technical vehicle (options)", No. 71606 (B66F 11/04, B60P 3/14, bulletin No. 8 dated 03/20/2008) "Emergency technical machine for servicing electrical contact networks" and No. 87391 "Emergency technical vehicle for servicing the electric networks of trams and trolleybuses" (В60Р 3/14, bull. No. 28 dated 10.10.2009).

The ATM-0.5 / 7 machine is equipped with a hydraulic drive lifting device with a pantograph-type boom, with an electrically insulated working platform and a lateral displacement mechanism, a kung for transporting the working team, an emergency lowering system for the working platform, and a telescopic ladder for emergency descent from the installation site. The horizontal movement of the working platform is due to its lateral displacement in the horizontal guides. The control and management system of the executive mechanisms of the machine is equipped with a limit load limiter.

The ATM-0.5 / 7 machine allows local movement with a raised working platform up to 5 m from the ground, at a speed of 5 km / h, with people on the working platform.

The disadvantages of machines such as ATM-0.5 / 7 include:

- maintaining the dependence of the safety of work on the human factor of the maintenance personnel operating the machine around the clock. This circumstance dictates the need to introduce into the control system automatic locks to control actuators in case of non-compliance with the established technological regulations;

- used in the design of the system of limiting the maximum load acting on the working platform, made on the basis of 4 strain gauge force sensors, does not allow you to quickly remotely diagnose their performance;

- insufficiently comfortable conditions for the transportation of workers in the kung, which is simultaneously used to transport tools and materials.

The inventive utility model is aimed at improving the safety of the operation of a lifting device with an electrically insulated platform, eliminating the influence of the human factor on the safety of work, increasing the maintainability of emergency technical vehicle systems and increasing the comfort of members of the work crew.

The solution to this problem is provided by the fact that the emergency technical vehicle for repairing the contact network of trams and trolleybuses, consisting of a car chassis with a two-row cab, a lifting device with a pantograph-type boom with a movable electrically insulated working platform and a lateral displacement mechanism, outriggers, a hydraulic actuator drive system mechanisms, monitoring and control systems, including limit load limiter, the main ladder to the working platform, an emergency telescope cal ladder device emergency lowering of the working platform, technology and tool compartments. The control and management system is equipped with an automatic device for blocking the lifting of the working platform above the regulated value set for movement with people on a raised platform, an automatic device for blocking the horizontal movement of the working platform when the outriggers are not exposed, an automatic device for blocking the movement of outriggers with a raised working platform, automatic devices for locking the lifting and displacement of the working platform when tilting the frame of the elevator you e regulated value. In addition, the machine is equipped with a pointer to the transport position of the working platform and outriggers, the device for unauthorized use of lifting equipment, as well as a removable device to hold the boom of the lifting device in a raised position during maintenance.

The limit load limiter used in the machine includes four strain-gauge force sensors of beam type mounted in the corners of a rectangular working platform in diagonals in pairs with an offset of 90 ° in the horizontal plane, as well as a microprocessor unit for processing signals from sensors, indicators and alarms, providing independent diagnostics of operability sensors.

The hydraulic cylinders for lifting the boom of the lifting device are made according to the plunger scheme, the working cavity of which is connected to the hydraulic system through a shut-off hydraulic valve docked to the body of the hydraulic cylinder.

The main staircase to the working platform is equipped with a transition platform with a railing.

As a variant of the emergency technical vehicle, the monitoring and control system consists of a microprocessor logic unit, a control panel, a microprocessor subsystem for monitoring the position of the supports, including four pressure sensors built into the hydraulic cylinders for lifting the supports and four proximity switches for monitoring the extreme positions of the supports, the microprocessor subsystem of the limit load limiter including four force sensors, an electronic signal roll indicator, two proximity switches for monitoring the neutral position eyes of the platform and monitoring the position of the platform lock in the transport position mounted on the platform, two proximity switches for monitoring the lifting height and transport position of the lifting device mounted on the boom of the lifting device, the electromagnetic unloading valve and electromagnetic control valves controlling the hydraulic cylinders of the supports, the hydraulic cylinders of the lifting device and the hydraulic displacement a working platform, as well as a control panel with an unauthorized access key to the lift Nome equipment.

The technical features of the claimed utility model can be implemented using tools used in general engineering.

The distinguishing features reflected in the formula of the utility model are necessary for its implementation and sufficient, because provide a solution to a technical problem.

In the future, the claimed utility model is illustrated by an example of its implementation, schematically depicted in the accompanying drawings, in which:

FIG. 1 is a diagram of an emergency technical vehicle in accordance with the claimed utility model (side view, plan and front view);

FIG. 2 is a diagram of a control and management system;

FIG. 3.1 ÷ 3.2 - installation diagrams of strain gauge force sensors of the limit load limiter and signal processing unit.

The emergency technical vehicle (see Fig. 1) is mounted on a car chassis 1 with a double cab and consists of a technological compartment 2, made in the form of a truss steel structure, on which a hydraulic actuating lifting device 3 with a pantograph-type boom, with a movable electrically insulated working platform 4 is installed designed to accommodate repairmen in the maintenance and repair of electrical contact lines of trams and trolleybuses and having the possibility of lateral movement due to the mechanism of horizontal escheniya (the diagram is not shown).

In turn, the working platform is mounted on the movable carriage 5 through four electrical insulators 6. On the movable carriage, four force sensors 7 of the limit load limiter are also installed. The carriage moves in the directions set on the upper frame 8 of the pantograph of the lifting device.

When moving, the repair team is located in the cabin of the double cab of the automobile chassis, on top of which there is installed a device for protecting 9 the windshield and the roof of the cab from possible falling of the tool from the working platform and contact wire during its installation.

The members of the working team are lifted to the working platform by stairs 10, equipped with a transition platform with a railing for greater safety and ease of lifting.

Using the transition pad, operational repair work with contact network elements, in particular in tunnels that do not require the use of an electrically insulated platform, can be performed.

A hydraulic drive system for actuators, a stationary control panel, an emergency lowering device for the working platform (not shown in the diagram) are located in the technological compartment. As an embodiment, as an emergency lowering device, an emergency pump powered by a car battery can be used.

The machine is equipped with four outriggers (outriggers) 11, and for emergency descent of brigade members with a working platform raised up, a telescopic vertical ladder 12, which is attached through insulators to the upper frame 8 of the pantograph of the lifting device.

The telescopic ladder automatically extends (folds) when lifting (lowering) the working platform.

For transportation of materials, tools and equipment to the place of work, the machine is equipped with two cargo sides 13 and 14, as well as a tool box (compartment) 15 with a special case 16 for transporting a contact wire bay.

The lifting of the working platform is carried out by hydraulic cylinders for lifting the boom 17 of a single-acting plunger type, while their working cavity is connected to the hydraulic system pipeline through a hydraulic valve 18 directly docked to the hydraulic cylinder body in order to increase operational safety in case of an emergency pipe break.

The block diagram of one of the possible embodiments of the control system and the machine is presented in figure 2. Functionally, the system provides control of actuators, control of parameters and condition of machine elements, automatic protection from emergency situations, including blocking the operation of actuators when deviating from established technological regulations.

The enlarged monitoring and control system consists of: a microprocessor subsystem of the limit load limiter 19, including four force sensors 7; microprocessor subsystem for monitoring the status of outriggers 20 (BKSO); four pressure sensors 21 built into the hydraulic cylinders of the outriggers; electronic signal clinometer 22 mounted on the frame of the lifting device; proximity switches 23, including four (WB4 ÷ WB7) mounted on the outriggers to control their transport position, two (WB1, WB2) to control the neutral position of the working platform and control the platform lock, two (WB3, WB8) to control the lifting height and transport position of the lifting device; a block of electrically controlled valves 24 and an electrically controlled discharge valve 25 installed in the process compartment; microprocessor block system logic 26; control panel 27 with a digital display, means of light and sound signaling and indication; control panel 28 with an unauthorized access key 29.

One of the main elements of the control and management system is the limit load limiter subsystem (see Fig. 3.1 ÷ 3.2).

The limit load limiter subsystem consists of four force sensors 7.1 ÷ 7.4, connected by cables with tight connectors to the electronic signal processing unit 30 (OPG). The sensors are located at the corners of the movable carriage of the working platform on the brackets 31 and perceive the weight of the load placed on the platform. Beam type strain gauge force sensors of known design. Inside the housing of each sensor, strain gages are glued, which are connected to a measuring strain gauge bridge. Under the action of an external load, elastic deformations occur in the elastic-sensitive part of the sensor, which the tensometric bridge converts into an electrical signal proportional to the value of the effective load.

The sensors are installed in pairs along the diagonals A-A and B-B of the movable carriage, with each pair offset 90 ° relative to each other in the horizontal plane, which provides better perception by the sensors and insulators of the horizontal dynamic loads that arise during the movement of the machine during braking and cornering.

The signals from the force sensors are fed to the input of the electronic processing unit (OCG). The signal processing unit is a measuring system based on a microprocessor with sound and light signaling and indication, as well as a platform lift blocking relay when the weight is exceeded (installed in the OCG, not shown in the diagram). The signal from each sensor is measured separately and summed to analyze the total platform load.

When the platform load is in the range of 95-110% of the rated load capacity, an intermittent sound signal is issued and an intermittent LED indication is turned on. At a load of more than 110%, a continuous sound signal is emitted, the LED indication is constantly on, and due to the actuation of the blocking relay, the platform lifting mechanism is switched off.

The front panel of the signal processing unit is shown in FIG. 3.2, on which are indicated the connectors 32.1 ÷ 32.4 for connecting the force sensors, the power connector and the relay connector 33 for blocking the operation of the actuator actuators when the workload is exceeded, a digital weight display 34, a sound siren 35 toggle switch, two light indicators 36 of the OPG operation, the power button 37 and operation indicators 38 of the force sensors, button 39 and installation indicator “0”, button 41 and indicator 42 for setting the permissible weight “500” on the platform, toggle switch 43 for disabling the locking of the actuators of the lifting equipment Bani in OPG setup mode, the toggle 44 enable OPG power button 45 and an indicator 46 mode "code" button 47 and an indicator 48 mode "weight".

The “code” mode is used to display the readings of an analog-to-digital converter, and the “weight” mode is used to display the weight readings in physical units (kilograms).

The limit load limiter (OPG) operates as follows.

Initially, the restriction threshold is set. For adjustment, the cover of the electronic processing unit is removed and, in the absence of load, the “0” button is pressed, while the weight of the “empty” platform is stored in the microcontroller of the measuring system.

Then, a standard load (for example, 500 kg) is installed on the platform and the “500” button is pressed. After that, the weight of the platform with a load of 500 kg is stored in the memory of the microcontroller. The OPG display shows the weight on the platform.

If you suspect improper operation of the force sensors, you can diagnose them. For this, the OCG readings are transferred to the “code” mode by pressing the corresponding button. At the same time, the reading of the analog-to-digital converter of the microcontroller is displayed on the OPG indicator, which has a significantly higher resolution compared to the readings in kg.

By pressing the buttons Sensor No. 1 ÷ Sensor No. 4 displays the readings of the corresponding force sensor on the display. Initially, the readings of all sensors are monitored without loading the platform, the readings should be close in value. The readings at full load, which should also be close in value, are similarly monitored. Compare changes in the readings of the sensors without load and with the load, if the readings do not change or change slightly, this indicates a malfunction of the corresponding force sensor.

Return to the total load indication is performed by simultaneously pressing two buttons of sensors No. 1 + No. 3 or No. 2 + No. 4. The readings in kg are translated by pressing the "weight" button.

Protection against possible emergency situations caused by deviations when operating the machine from the technological regulations is carried out as follows.

Automatic blocking of the rise of the working platform above the regulated value set for movement with people on a raised platform (5 m from the ground at a speed of not more than 5 km / h) is achieved by processing the data monitoring system from proximity switches (VB2, VB3) and issuing a signal to prohibit further rise.

To automatically block the possibility of horizontal movement of the working platform, when the supports are not exposed, it is ensured by processing the information monitoring system from the proximity switch VB2 and pressure sensors DD1-DD4 with a signal to the electromagnet of the control valve controlling the movement of the platform.

Automatic blocking of the movement of the outriggers, when the working platform is raised, is ensured by processing the information monitoring system from the VB3 proximity sensor and the BKSO microprocessor unit with a signal to prohibit the lifting of supports.

Automatic blocking of the lifting and displacement of the working platform, when the elevator frame is tilted above the regulated value to 5 °, is ensured by processing the signal from the electronic roll indicator EC and issuing a signal about the ban on lifting and shifting the platform.

A warning about the impossibility of the machine to move when the outriggers (extreme upper) and the working platform (extreme lower) are not installed in the transport position is provided by processing the signal monitoring system from proximity switches VB1, VB2, VB4 ÷ VB7 and displaying the light indication on the control panel, as well as a sound signal.

In addition, to prevent unauthorized use of lifting equipment by personnel who do not have the necessary access, the control and management system provides for the use of a power switch of the system with a KND lock.

To hold the boom of the lifting device in the raised position, when carrying out equipment maintenance, a removable device was used that blocks the relative movement of the pantograph sections (not shown in the diagram).

Claims (4)

1. An emergency technical vehicle for repairing the contact network of trams and trolleybuses, consisting of a car chassis with a two-row cab, a lifting device with a pantograph-type boom with an electrically insulated working platform and lateral displacement mechanism, outriggers, hydraulic actuator drive system, control and management system including limiter of the maximum load, the main ladder of ascent to the working platform, emergency telescopic ladder, emergency lowering device molds, technological and tool compartments, characterized in that the monitoring and control system is equipped with an automatic device for blocking the lifting of the working platform above the regulated value set for movement with people on a raised platform, an automatic device for blocking the horizontal movement of the working platform with not set outriggers an automatic device for blocking the movement of outriggers with a raised working platform, an automatic device for lifting and displacement of the working platform when the frame of the lifting device is tilted above the regulated value, by indicators of the transport position of the working platform and outriggers, the device for unauthorized use of lifting equipment, a removable device to hold the boom of the lifting device in a raised position during maintenance. 2. An emergency technical vehicle for repairing the contact network of trams and trolleybuses according to claim 1, characterized in that the limit load limiter includes four tensometric force sensors of beam type installed in the corners of a rectangular movable working platform in pairs diagonally with a 90 ° offset horizontal plane, as well as a microprocessor unit for processing signals from sensors, indications and alarms, providing independent diagnostics of the sensors' operability, in addition, boom lifting hydraulic cylinders Removable means are arranged on the plunger circuit working chamber which is connected to the hydraulic system through the hydraulic valve shutoff, docked to the housing of the hydraulic cylinder. 3. An emergency technical vehicle for repairing the contact network of trams and trolleybuses according to claim 1, characterized in that the main staircase is equipped with a transition platform with a railing for lifting onto a working platform, a windshield and roof protection device for the automobile chassis, two cargo sides and a tool box with compartment for contact wire. 4. An emergency technical vehicle for repairing the contact network of trams and trolleybuses according to claim 1, characterized in that the monitoring and control system consists of a microprocessor logic unit, a control panel, a microprocessor subsystem for monitoring the position of the supports, including four pressure sensors built into the lift cylinders supports, and four proximity switches for monitoring the extreme positions of supports, the microprocessor subsystem of the limit load limiter, including four force sensors, an electronic signal roll indicator, two on-off switches for monitoring the neutral position of the working platform and the position of the platform lock in the transport position mounted on the platform, two proximity switches for monitoring the height of the lift and the transport position of the lifting device mounted on the boom of the lifting device, an electromagnetic unloading valve and electromagnetic control valves controlling the hydraulic cylinders of the supports, lifting hydraulic cylinders devices and hydraulic displacement of the working platform, as well as the remote control key with unauthorized access to lifting equipment.

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