RU192691U1 - Device for water cleaning heating surfaces of a boiler unit - Google Patents

Abstract

The technical solution relates to blasting surfaces. A device for water cleaning the heating surfaces of the boiler unit, made with the possibility of connecting to the control system and the water supply unit, contains vertical and horizontal drives, a holder for installation on the wall of the boiler unit, made with a window with a shutter, a window shutter drive mechanism mounted on the holder , a water supply valve, a hydraulic monitor with a nozzle connected to horizontal and vertical movement actuators, configured to be connected to a water supply system and supply of a jet of water to the surface being cleaned, and a swivel mechanism. According to the claimed technical solution, a hydraulic monitor with a nozzle is rigidly fixed to the hinge mechanism, horizontal and vertical movement drives are attached to the hinge mechanism with the formation of kinematic pairs. Each of the drives of vertical and horizontal movements may contain an induction motor and gearbox. The technical result of the claimed technical solution is manifested in increasing the efficiency of cleaning.

Description

The technical solution relates to blasting of surfaces, in particular to devices for cleaning heating surfaces of boiler units.

The prior art knows the solution, which is a device for blasting surfaces, containing a nozzle with a holder in the form of a barrel, a frame having a mounting unit for hinging the nozzle in it and a drive mechanism for raising, lowering and swinging in the horizontal plane of the nozzle, including vertically mounted on the frame and the drive screw connected to the drive and the nut mounted on the screw. The device is equipped with a means for a fixed change in the vertical plane of the walking frequency of the lines described by the jet spot on the machined surfaces, and the nozzle swing mechanism in the horizontal plane is made in the form of a swivel arm with a slot rigidly fixed to the vertical axis of rotation of the mounting unit with the possibility of changing its position relative to the axis swing and connected to the lead screw by means of a lever with a pusher fixed to the lead screw. The lever pusher is mounted in the slots of the pivot arm with the possibility of reciprocating movement along it during rotation of the lead screw, as well as with the possibility of a fixed change in the location of the push rod on the lever relative to the axis of the lead screw. RF patent for the invention №2118574, IPC: B08B 3/02; F28G 1/16, published 10.09.1998.

The disadvantage of this technical solution is the low efficiency of processing the surface of the boiler due to the uneven movement of the nozzle during operation, associated with a complex kinematic scheme of drives for linear movement of the barrel with the nozzle.

A technical solution is known, selected as the closest analogue, which is a device for blasting heating surfaces. The device comprises a rack equipped with horizontal guides in the form of two rods, between which there is a spindle connected through a coupling to the engine. On the guide rods, by means of rollers, a carriage is mounted, connected by a spindle nut with a spindle. A similar cross member is rigidly fixed to the carriage, connected to another engine, the carriage of which is connected to a leash connected by a biaxial hinge to a slide sleeve mounted on a tubular carrier of a nozzle assembly. The nozzle assembly comprises a replaceable nozzle mounted in a tubular body, the continuation of which is a tubular carrier connected by a hose to an inlet valve. The uniaxial hinge housing is connected to the midpoints of two parallel three-joint rods. RF patent for invention No. 2289079, IPC F28G 1/00, published December 10, 2006.

A disadvantage of the known technical solution is the change in the angular velocity of the hydraulic monitor during cleaning of the boiler surfaces, which leads to inconsistency in the time of exposure of the water jet to the surface being cleaned and deviations from the optimal value during the scanning of the jet along the surface being cleaned. This drawback is due to the kinematic scheme of horizontal and vertical drives, which first provides for converting the angular rotation of electric motors into linear movement of the monitor carrier in vertical and horizontal planes using a screw-nut gear and its subsequent transformation into angular movements of the monitor itself. The second transformation is non-linear, which causes a drawback.

A distinctive feature of the proposed solution is the change in the kinematic scheme of the drives, in which the intermediate conversion to linear movement of the carrier is excluded from it, and the carrier itself is also excluded, and the angular rotation of the drives is transmitted directly to the hinged mechanism and, mounted on it, a hydraulic monitor, due to the formation of kinematic pairs : "Horizontal movement drive - articulated mechanism" and "vertical movement drive - articulated mechanism".

The technical result of the claimed technical solution is manifested in increasing the cleaning efficiency due to the provision of an optimal constant time of the impact of the water jet on the surface being cleaned during scanning over the entire surface.

The technical result is achieved by the fact that the device for water cleaning of the heating surfaces of the boiler unit, made with the possibility of connecting to the control system and to the water supply unit, contains drives of vertical and horizontal movements, a holder for installation on the wall of the boiler unit, made with a window with a shutter, fixed on the holder there is a window shutter drive mechanism, a water supply valve, a hydraulic monitor with a nozzle connected to horizontal and vertical displacement drives, made with the possibility of NOSTA connection to the water supply system and supplying water jets to the surface being cleaned through the window and the hinge mechanism in the form of a double parallelogram, thus nozzle jet means rigidly secured to the hinge mechanism, drives the horizontal and vertical movement are fixed to the hinge mechanism to form kinematic pairs. Each of the drives of vertical and horizontal movements may contain an induction motor and gearbox.

In order to describe the claimed technical solution, the following definition is adopted:

A hydraulic monitor is a device used to form a dense fluid jet moving at a high speed and control it in order to clean surfaces from slag deposits. In the claimed device, the hydraulic monitor is made with a nozzle and is intended for supplying water through a window in the holder and forming a compact jet.

The formation of kinematic pairs “horizontal displacement drive - articulated mechanism” and “vertical displacement drive - articulated mechanism” ensures the movement of the hydraulic monitor with a constant angular velocity, as a result of which the exposure time of the water jet per unit area of the surface to be cleaned remains constant and optimal during the entire cleaning process.

Drives of vertical and horizontal movements are used to ensure the movement of the articulated mechanism and, consequently, the hydraulic monitor, in mutually perpendicular directions in predetermined angular limits.

The double parallelogram articulated mechanism provides the centering of the hydraulic monitor rigidly fixed on it relative to the window and its movement along the desired path by converting the rotational movement of the drives into the angular rotation of the hydraulic monitor in horizontal and vertical planes.

Mounted on the holder, the window shutter drive mechanism ensures its opening for the period of cleaning the heating surface, and closing to protect the device in standby mode from the thermal effects of the boiler.

The water supply valve enables and disables the water supply.

The claimed technical solution is further explained using the figure, which conventionally presents one of the possible variants of the device for water cleaning of the heating surfaces of the boiler unit.

In FIG. 1 shows a diagram of a device for water cleaning the heating surfaces of a boiler unit.

In FIG. 1 shows a device (1) for water cleaning the heating surfaces of a boiler unit, comprising a drive (2) for vertical movement and a drive (3) for horizontal movement, a holder (4) made with a window (5) with a shutter, a mechanism (6) for driving the shutter of the window (5), water supply valve (7), hydraulic monitor (8) with nozzle, swivel mechanism (9).

Next, with reference to the figures, the design of the device (1) for water cleaning of the heating surfaces of the boiler unit is described.

A device (1) for water-cleaning the heating surfaces of a boiler unit includes a holder (4) for installation on the wall of the boiler unit. The holder (4) can be made in the form of a welded structure, mainly from sheet steel, channels and angles, on which holes can be provided for mounting the device (1) to the boiler wall.

The holder (4) is made with a window (5), which is closed and opened by a shutter using the mechanism (6) of the shutter drive mounted on the holder (4).

The device (1) comprises a drive (2) for vertical movement and a drive (3) for horizontal movement. Each drive mainly consists of an induction motor and gearbox.

In a preferred embodiment, the device contains two end inductive sensors in each drive (2) and (3) mounted on the gearbox wall from the output shaft side, and a metal plate mounted on the output shaft of the gearbox, when the extreme angular positions of which are activated by sensors . The current position of the hydraulic monitor is determined by the number of pulses of the third inductive sensor mounted on the drive motor. The sensor responds to a metal impeller mounted on the axis of the drive motor.

The device (1) comprises a water supply valve (7) and a hydraulic monitor (8) with a nozzle connected to the actuators (3) and (2) of horizontal and vertical movements. The hydraulic monitor (8) is made with the possibility of connecting, for example, using a flexible hose, to the water supply system and supplying a stream of water to the surface being cleaned through the window (5).

The hydraulic monitor (8) is rigidly fixed to the hinge mechanism (9) in the form of a double parallelogram swinging in horizontal and vertical planes. In any position of the mechanism, the axis of the hydraulic monitor (8) passes through a point that is the center of swing and located in the middle of the window (5) in the plane of the holder (4).

Drives (3) and (2) of horizontal and vertical movements are fixed to the hinge mechanism (9) with the formation of kinematic pairs, i.e. the rotation of each of the drives (3) and (2) directly affects the hinge mechanism (9), causing it to move, and, as a consequence, the movement of the hydraulic monitor (8) with a constant angular velocity.

In the device (1) junction boxes can be provided for its connection to the control system.

One of the preferred uses of the claimed device (1) is shown below by way of example.

The device (1) can be included in the cleaning complex, including four such devices and one common control system. For each device (1) it is possible to set its own trajectory of the jet along the surface being cleaned.

At the beginning of the operation of the device (1), the control system supplies power to the window shutter drive mechanism (6). The carrier of the mechanism (6) starts rotation, raising the shutter, and opening the window (5).

Then, at the signal of the control system, the water supply valve (7) opens and the rotation of the horizontal actuator (3) begins. At the same time, the hinge mechanism (9) deflects the hydraulic monitor (8) in a horizontal plane and a stream of water horizontally moves along the screen surface of the boiler.

Upon reaching the specified limit of angular displacement in the horizontal plane, the control system issues a command to turn off the power of the drive motor (3) horizontal movement and turn on the drive motor (2) vertical movement.

 Similarly to the horizontal drive (3), the vertical drive (2) moves the hydraulic monitor (8) along the vertical axis by means of a hinge mechanism (9). A stream of water moves vertically across the boiler screen. Upon reaching the specified length of the vertical cleaning step, the control system issues a command to turn off the power of the vertical drive motor (2) and turn on the horizontal drive drive motor (3).

This alternation of vertical and horizontal steps continues until the program of the selected cleaning path is completed.

After that, at the signal of the control system, the water supply valve (7) closes, the damper drive mechanism (6) is activated, followed by closing the window (5), the hydraulic monitor (8) returns to its original position.

The presented figures, the description of the design and use of the device for water cleaning the heating surfaces of the boiler unit do not exhaust the possible options and do not limit in any way the scope of the claimed technical solution. Other options for execution and use in the scope of the claimed formula are possible. Depending on the purpose, the device for water cleaning of the heating surfaces of the boiler unit can be manufactured in different sizes and configurations.

The device for water cleaning the heating surfaces of the boiler unit is characterized by high efficiency due to the fact that the hydraulic monitor with nozzle is rigidly fixed to the hinge mechanism, horizontal and vertical movement drives are attached to the hinge mechanism with the formation of kinematic pairs, thereby ensuring the movement of the monitor with a constant angular velocity and optimal constant the exposure time of the water jet per unit area of the surface to be cleaned.

Claims (2)

1. A device for water cleaning the heating surfaces of the boiler unit, made with the possibility of connecting to the control system and to the water supply unit, containing vertical and horizontal actuators, a holder for installation on the wall of the boiler unit, made with a window with a shutter, a drive mechanism mounted on the holder window shutters, a water supply valve, a hydraulic monitor with a nozzle connected to horizontal and vertical movement actuators, made with the possibility of connecting to a water supply system s and supplying water jets to the surface being cleaned through the window and the hinge mechanism in the form of a double parallelogram, characterized in that the jet means having a nozzle is rigidly secured to the hinge mechanism, drives the horizontal and vertical movement are fixed to the hinge mechanism to form kinematic pairs. 2. A device for water purification of heating surfaces of a boiler unit according to claim 1, characterized in that each of the drives of vertical and horizontal movements contains an asynchronous motor and gearbox.

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