CN114016416A - Vehicle-mounted two-component material nozzle assembly and spraying flow control method - Google Patents
Vehicle-mounted two-component material nozzle assembly and spraying flow control method Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 147
- 238000005507 spraying Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007921 spray Substances 0.000 claims abstract description 137
- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims description 64
- 239000007924 injection Substances 0.000 claims description 64
- 238000010438 heat treatment Methods 0.000 claims description 25
- 230000009471 action Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 9
- 238000002156 mixing Methods 0.000 abstract description 7
- 238000000889 atomisation Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
- E01C19/17—Application by spraying or throwing
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
- E01C19/17—Application by spraying or throwing
- E01C19/174—Apparatus with pump-discharge
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
- E01C19/17—Application by spraying or throwing
- E01C19/176—Spraying or throwing elements, e.g. nozzles; Arrangement thereof or supporting structures therefor, e.g. spray-bars
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
Abstract
A vehicle-mounted two-component material nozzle assembly and a spraying flow control method are disclosed, the vehicle-mounted two-component material nozzle assembly comprises two parts which are symmetrically arranged front and back, wherein each part is provided with a plurality of groups of spraying units which are transversely arranged, and each spraying unit is internally provided with a spray head, a flow control valve, a micro motor and a lead screw nut transmission mechanism; the output shaft of the micro motor is fixedly connected with a lead screw in the lead screw nut transmission mechanism; the spray head is provided with a jet hole, the feed port end of the jet hole is communicated with the material conveying pipeline, and the discharge port end of the jet hole is provided with an arc-shaped surface diversion port; the flow control valve is a cylindrical rod piece, one end of the flow control valve is fixedly assembled with a rectangular nut in the screw nut transmission mechanism, and the other end of the flow control valve is a ball valve core extending into a flow control valve moving channel of the spray head. The invention realizes the atomization mixing of the two-component materials under different vehicle speeds and ground temperature working conditions and the uniform spraying on the concrete bridge floor, and achieves the purpose of ensuring the paving quality of the waterproof bonding structure of the concrete bridge floor.
Description
Technical Field
The invention relates to a two-component material nozzle assembly and a spraying flow control method, in particular to a two-component material nozzle assembly arranged below the tail part of a spraying engineering truck and a spraying flow control method capable of ensuring that materials are uniformly sprayed under the working conditions of different speeds and ground temperatures.
Background
The multi-medium strong-adhesion waterproof layer is a novel concrete bridge deck waterproof adhesion structure, and is a composite interlayer functional layer formed by spraying (or sprinkling) two-component reaction type resin, rubber modified asphalt, fiber and rubber modified asphalt on a construction surface in sequence, finally sprinkling single-particle-size aggregate, and carrying out physical and chemical reactions of various materials. The pavement of the multi-medium strong-bonding waterproof layer needs to be realized by means of special construction equipment, namely a multi-medium strong-bonding synchronous spraying vehicle, and a two-component material automatic spraying system is also needed to be arranged on the multi-medium strong-bonding synchronous spraying vehicle so as to realize the atomization and mixing of the two-component materials and the uniform spraying of the two-component materials on the concrete bridge floor.
The traditional two-component spraying system adopts the mode of mixing the inside of a spray gun, belongs to limited impact, has lower mixing efficiency and smaller output flow, cannot be directly applied to a multi-medium strong-bonding synchronous spraying vehicle, needs to improve the mixing mode of materials in the two-component spraying system, simultaneously needs to optimize and design a two-component material nozzle assembly, and creates a spraying flow control method capable of ensuring that the materials are uniformly sprayed under the working conditions of different vehicle speeds and ground temperatures.
Disclosure of Invention
The invention provides a vehicle-mounted two-component material nozzle assembly and a material spraying control method, and aims to realize atomization mixing of two-component materials under different vehicle speeds and ground temperature working conditions and uniform spraying on a concrete bridge floor through improvement of a material nozzle assembly structure and innovative design of a material spraying flow control method, so that the aim of ensuring the paving quality of a waterproof bonding structure of the concrete bridge floor is fulfilled.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vehicle-mounted two-component material nozzle assembly comprises two parts which are symmetrically arranged front and back and are respectively communicated with a material tank of a material A and a material tank of a material B through material conveying pipelines, wherein each part is provided with a plurality of groups of transversely arranged injection units, and each injection unit is internally provided with a spray head, a flow control valve, a micro motor and a lead screw nut transmission mechanism; the micro motor is arranged below a cross beam at the tail part of the spraying vehicle through a fixed support, and an output shaft of the micro motor is fixedly connected with a lead screw in a lead screw nut transmission mechanism; the lead screw in the lead screw nut transmission mechanism is provided with thread turn number scales, and the nut matched with the lead screw is a rectangular nut; the spray head is provided with a jet hole, the feed port end of the jet hole is communicated with the material conveying pipeline, the discharge port end of the jet hole is provided with an arc-shaped surface diversion port, and the middle part of the jet hole is provided with a flow control valve moving channel vertically intersected with the jet hole; the flow control valve is a cylindrical rod piece, one end of the flow control valve is fixedly assembled with a rectangular nut in the screw nut transmission mechanism, and the other end of the flow control valve is a ball valve core extending into a flow control valve moving channel of the spray head.
According to the vehicle-mounted two-component material nozzle assembly, the injection unit is also internally provided with the electromagnetic heating pipe, and the electromagnetic heating pipe is hermetically connected with the injection hole and the feed inlet end of the spray head.
Above-mentioned on-vehicle two ingredient material nozzle assembly still be equipped with the flow control valve supporting seat in the injection unit, the flow control valve supporting seat passes through the fixed bolster and installs below the spray truck afterbody crossbeam, is equipped with the flow control valve on the flow control valve supporting seat and passes the hole to set up slide bearing in the flow control valve passes the hole.
In each part of the vehicle-mounted two-component material nozzle assembly, which is symmetrically arranged in front and back, the number of the transversely arranged spraying units is not less than four, and the spraying units are arranged on a spraying pipe communicated with a material conveying pipeline at a set angle.
The vehicle-mounted two-component material nozzle assembly is provided with the material flow pumps in the material conveying pipelines communicated with the material tanks A and B.
A two-component material sprays the flow control method, it depends on the spray truck which disposes the above-mentioned vehicle-carried two-component material spray nozzle assembly, while carrying on A, B two kinds of materials to spray the operation with different speed, atomize and mix A, B two kinds of materials through the two-component material spray nozzle assembly, and monitor the flow situation of the shower nozzle in each group of injection units in real time with the help of the flow sensor, the flow information of the shower nozzle in each group of injection units monitored compares the shower nozzle flow set value under this operating mode, the PID control system controls the micro-machine action in each group of injection units according to the situation of difference between them, realize the control to the opening of flow control valve, finish the adjustment to the shower nozzle flow, the concrete control parameter is as follows:
in the initial state, the vehicle speed is 0km/h, a rectangular nut in a screw nut transmission mechanism is positioned at the foremost position of a screw, the thread scale of the screw is 0, and at the moment, a ball valve core of a flow control valve in an injection unit completely blocks an injection hole, so that no material is injected from a nozzle;
when the vehicle speed is increased to 0-2 km/h, the micro motor drives the screw nut transmission mechanism to operate, the rectangular nut moves backwards to the position where the screw thread scales are 0-4 circles, the ball valve core of the flow control valve in the injection unit plugs the injection hole part, and the flow of the material sprayed out of the spray head of each group of injection units is 0-222 ml/s;
when the vehicle speed is increased to 2-4 km/h, the micro motor drives the screw nut transmission mechanism to operate, the rectangular nut moves backwards to the position where the thread scales of the screw are 4-8 circles, the ball valve core of the flow control valve in the injection unit plugs the part of the injection hole, and the flow of the material sprayed out of the spray head of each group of injection units is 222-444 ml/s;
when the vehicle speed is increased to 4-6 km/h, the micro motor drives the screw nut transmission mechanism to operate, the rectangular nut moves backwards to the position where the thread scales of the screw are 8-12 circles, the ball valve core of the flow control valve in the injection unit plugs the part of the injection hole, and the flow of the material sprayed out of the spray head of each group of injection units is 444-666 ml/s;
when the vehicle speed is increased to 6-8 km/h, the micro motor drives the screw nut transmission mechanism to operate, the rectangular nut moves backwards to the position where the thread scales of the screw are 12-16 circles, the ball valve core of the flow control valve in the injection unit plugs the injection hole part, and the flow of materials sprayed out of the spray heads of each group of injection units is 666-888 ml/s.
The double-component material spraying flow control method can also control the spraying angle and the spraying coverage area according to the position of the spray head in each spraying unit, and the specific control parameters are as follows:
when the distance b =300mm between the spray heads in two adjacent spray units and the distance H =250mm between the spray heads and the spray ground, controlling the spray angle 2 alpha = 45-49.6 degrees of each spray head to enable the area of a spray coverage area to be 2.4-2.6 m2；
When the distance b =300mm between the spray heads in two adjacent spray units and the distance H =300mm between the spray heads and the spray ground, controlling the spray angle 2 alpha = 38.1-42.1 degrees of each spray head to enable the area of the spray coverage area to be 2.6-2.8 m2；
When the distance b =350mm between the spray heads in two adjacent spray units and the distance H =250mm between the spray heads and the spray ground, controlling the spray angle 2 alpha = 54.7-60 degrees of each spray head to enable the area of a spray coverage area in unit time to be 2.8-3 m2；
When the distance b =350mm between the spray heads in two adjacent spray units and the distance H =300mm between the spray heads and the spray ground, controlling the spray angle 2 alpha = 46.7-51.4 degrees of each spray head to enable the area of a spray coverage area in unit time to be 3-3.2 m2。
According to the double-component material spraying flow control method, the temperature of the material sprayed to the ground is monitored through the infrared temperature measuring device arranged at the bottom of the spraying vehicle, and the specific control parameters are as follows:
when the monitored total temperature loss delta t is less than or equal to 2 ℃, controlling the power of the electromagnetic heating pipe to be 1000W;
when the monitored total temperature loss is more than or equal to 4 ℃ and delta t is more than 2 ℃, controlling the power of the electromagnetic heating pipe to be 1500W;
when the monitored total temperature loss is more than or equal to 6 ℃ and delta t is more than 4 ℃, controlling the power of the electromagnetic heating pipe to be 2000W;
when the monitored total temperature loss is more than or equal to 8 ℃ and delta t is more than 6 ℃, controlling the power of the electromagnetic heating pipe to be 2500W;
when the monitored total temperature loss is more than or equal to 10 ℃ and delta t is more than 8 ℃, the power of the electromagnetic heating pipe is controlled to be 3000W.
According to the two-component material spraying flow control method, the ultrasonic wave generating device is additionally arranged on the AB material tank, so that the ultrasonic waves introduced into the material tank stir the materials, and the conveying pipeline and the nozzle are cleaned along with the transmission of the materials.
According to the two-component material spraying flow control method, the ultrasonic wave generating device is the ultrasonic wave generator with adjustable frequency, and the requirement of smooth transmission in different component materials is met by adjusting the frequency of the ultrasonic wave generating device.
The invention provides a vehicle-mounted two-component material nozzle assembly, which can drive a ball valve core of a flow control valve to move back and forth through a micro motor and a lead screw nut transmission mechanism, so that the flow area of a spray hole of a spray head in each group of spray units is adjusted, and the spray flow of the spray head is controlled. The invention also provides a double-component material spraying flow control method matched with the vehicle-mounted double-component material nozzle assembly, which monitors the flow condition of the spray head in each group of spray units in real time through a flow sensor, compares the monitored flow information of the spray head in each group of spray units with the set flow value of the spray head under the working condition, and controls the action of the micro motor in each group of spray units through a PID control system according to the difference value of the flow information and the set flow value of the spray head, so that the opening of a flow control valve is adjusted, and the control of the flow of the spray head in each group of spray units is completed. In addition, the double-component material spraying flow control method can also control the spraying angle and the spraying coverage area according to the position of the spray head in each spraying unit; the temperature of the materials sprayed to the ground is monitored through an infrared temperature measuring device installed at the bottom of the spraying vehicle, the working state of the electromagnetic heating pipe in each spraying unit is controlled according to the temperature difference between the sprayed materials and the materials in the material tank, so that the loss of the temperature of the sprayed materials is compensated, the two-component materials are guaranteed to perform physical and chemical reactions under the set temperature condition, and a composite interlayer functional layer of the multi-medium strong-bonding waterproof layer is formed. In a word, the invention realizes the atomization mixing and the uniform spraying of the two-component material on the concrete bridge floor under the working conditions of different vehicle speeds and ground temperatures by improving the structure of the material nozzle component and designing the control method of the material injection flow, thereby achieving the purpose of ensuring the paving quality of the waterproof bonding structure of the concrete bridge floor.
Drawings
FIG. 1 is a schematic view of a vehicle-mounted two-component material nozzle assembly of the present invention positioned in the middle of a material spraying system;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic structural diagram of an injection unit in the vehicle-mounted two-component material nozzle assembly according to the present invention;
FIG. 4 is a schematic view of a showerhead construction;
FIG. 5 is a view from direction K of FIG. 4;
FIG. 6 is a schematic view of the cross-sectional structure M-M of FIG. 5;
FIG. 7 is a schematic view of the cross-sectional structure of N-N in FIG. 5;
FIG. 8 is a schematic view of nozzle flow adjustment;
FIG. 9 is a schematic view of a material spray condition;
fig. 10 is a side view of fig. 9.
The list of labels in the figure is:
1. an ultrasonic wave generating device;
2. a charging bucket;
3. a feed flow pump;
4. a spray tube;
5. the device comprises an injection unit, 5-1 parts of a nozzle, 5-1-1 parts of a flow control valve moving channel, 5-1-2 parts of an injection hole, 5-1-3 parts of an arc surface flow guide opening, 5-2 parts of an electromagnetic heating pipe, 5-3 parts of a flow control valve supporting seat, 5-4 parts of a fixing support, 5-5 parts of a micro motor, 5-6 parts of a lead screw, 5-7 parts of a rectangular nut, 5-8 parts of a flow control valve.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Referring to fig. 1 and 2, the vehicle-mounted two-component material nozzle assembly of the invention comprises two parts which are symmetrically arranged in front and back and are respectively communicated with a material tank 2 of a material A and a material B through a material conveying pipeline, wherein each part is provided with at least four groups of transversely arranged injection units 5, the injection units 5 are arranged on a spray pipe 5 communicated with the material conveying pipeline at a set angle, and the material conveying pipelines communicated with the material tank 2 of the material A and the material tank B are respectively provided with a material flow pump 3.
Referring to fig. 3, 4, 5, 6 and 7, in each injection unit 5 of the vehicle-mounted two-component material nozzle assembly, a nozzle 5-1, an electromagnetic heating pipe 5-2, a flow control valve 5-8, a flow control valve support base 5-3, a micro motor 5-5 and a screw nut transmission mechanism are arranged; the micro motor 5-5 is arranged below a cross beam at the tail part of the spraying vehicle through a fixed support 5-4, and an output shaft of the micro motor is fixedly connected with a lead screw 5-6 in a lead screw nut transmission mechanism; the lead screw 5-6 in the lead screw nut transmission mechanism is provided with thread turn number scales, and the nut matched with the lead screw is a rectangular nut 5-7; the spray head 5-1 is provided with a spray hole 5-1-2, the feed port end of the spray hole 5-1-2 is communicated with a material conveying pipeline through an electromagnetic heating pipe 5-2 which is connected in a sealing way, the discharge port end of the spray hole is provided with an arc surface diversion port 5-1-3, and the middle part of the spray hole 5-1-2 is provided with a flow control valve moving channel 5-1-1 which is vertically crossed with the spray hole; the flow control valve 5-8 is a cylindrical rod, one end of the flow control valve is fixedly assembled with a rectangular nut 5-7 in the screw nut transmission mechanism, and the other end of the flow control valve is a ball valve core extending into a flow control valve moving channel 5-1-1 of the spray head 5-1; the flow control valve supporting seat 5-3 is installed below a beam at the tail of the spraying vehicle through a fixing support 5-4, a flow control valve through hole is formed in the flow control valve supporting seat 5-3, and a sliding bearing is arranged in the flow control valve through hole.
Referring to fig. 4, 5 and 9, in the vehicle-mounted two-component material nozzle assembly, the arc-shaped surface flow guide opening 5-1-3 is arranged at the discharge opening end of the spray head 5-1 in each injection unit 5, so that the impact energy of the material can be softened through the arc-shaped surface flow guide opening 5-1-3, the injection angle is effectively controlled, the spraying fan-shaped angle tends to be stable, the phenomenon of uneven spraying caused by concentrated material injection force is avoided, and the material spraying quality is improved.
Referring to fig. 8 and 9, the method for controlling the spraying flow of the two-component material according to the present invention relies on the spraying vehicle equipped with the vehicle-mounted two-component material nozzle assembly, and according to the flow calculation formula:
Q=（a*v*h*t）/ρ
q- -flow value through nozzle (m)3/s）；
a-the spray width (m) of a group of spray heads;
v- -the speed of travel of the spray truck (m/s);
h- -thickness of material sprayed onto the pavement (m);
t- - -the running time(s) of the spreading vehicle
Rho- - -AB material density (kg/m)3）；
In the present embodiment, a =0.4m, H =0.001m, and ρ =1kg/m are known2T =1 s; it was derived that the relationship between the flow rate and the travelling speed of the spray vehicle was Q =0.0004 v.
According to the derivation result, the opening degree of the flow control valve 5-8 corresponding to different vehicle speed working conditions and the flow sprayed by the spray head 5-1 of each group of the spray units 5 can be calculated, and the specific control parameters are as follows:
in an initial state, the vehicle speed is 0km/h, a rectangular nut 5-7 in a screw nut transmission mechanism is positioned at the foremost position of a screw 5-6, the thread scale of the screw is 0, at the moment, a ball valve core of a flow control valve 5-8 in an injection unit 5 completely plugs an injection hole 5-1-2, and no material is injected from a nozzle;
when the vehicle speed is increased to 0-2 km/h, the micro motor 5-5 drives the screw nut transmission mechanism to operate, so that the rectangular nut 5-7 moves backwards to the position where the screw thread scale is 0-4 circles, the ball valve core of the flow control valve 5-8 in the injection unit 5 partially plugs the injection hole 5-1-2, and the flow of the material sprayed out of the spray head 5-1 of each group of injection units 5 is 0-222 ml/s;
when the vehicle speed is increased to 2-4 km/h, the micro motor 5-5 drives the screw nut transmission mechanism to operate, so that the rectangular nut 5-7 moves backwards to the position where the thread scales of the screw are 4-8 circles, the ball valve core of the flow control valve 5-8 in the injection unit 5 partially plugs the injection hole 5-1-2, and the flow of the material sprayed out of the spray head 5-1 of each group of injection units 5 is 222-444 ml/s;
when the vehicle speed is increased to 4-6 km/h, the micro motor 5-5 drives the screw nut transmission mechanism to operate, so that the rectangular nut 5-7 moves backwards to the position where the thread scales of the screw are 8-12 circles, the ball valve core of the flow control valve 5-8 in the injection unit 5 partially plugs the injection hole 5-1-2, and the flow of the material sprayed out of the spray head 5-1 of each group of injection units 5 is 444-666 ml/s;
when the vehicle speed is increased to 6-8 km/h, the micro motor 5-5 drives the screw nut transmission mechanism to operate, the rectangular nut 5-7 moves backwards to the position where the scales of the screw threads are 12-16 circles, at the moment, the ball valve core of the flow control valve 5-8 in the injection unit 5 partially plugs the injection hole 5-1-2, and the flow of the material sprayed out of the spray head 5-1 of each group of injection units 5 is 666-888 ml/s.
Referring to fig. 9 and 10, the method for controlling the spraying flow rate of the two-component material according to the present invention can also control the spraying angle and the spraying coverage area according to the position of the nozzle 5-1 in each spraying unit 5, and the specific control parameters are as follows:
referring to fig. 3, 9 and 10, the method for controlling the spraying flow of the two-component material according to the present invention further monitors the temperature of the material sprayed to the ground through the infrared temperature measuring device installed at the bottom of the spraying vehicle, because the temperature field is not uniform, such as local surface water accumulation, tree shadow spreading, and other working conditions, the field surface may have a difference in reactivity and a difference in coating curing behavior, so the method controls the working state of the electromagnetic heating tube in each spraying unit according to the temperature difference between the sprayed material and the spraying point in the bucket, thereby compensating the temperature loss before and after the material spraying, ensuring that the two-component material performs physical and chemical reactions under the set temperature condition to form a composite interlayer functional layer, thereby improving the coating quality uniformity, in this embodiment, the maximum output power of the electromagnetic heating tube 5-2 is selected to be 3000W, the specific control parameters are as follows:
when the monitored temperature loss delta t is less than or equal to 2 ℃, controlling the power of the electromagnetic heating pipe 5-2 to be 1000W;
when the monitored temperature loss is more than or equal to 4 ℃ and delta t is more than 2 ℃, controlling the power of the electromagnetic heating pipe 5-2 to be 1500W;
when the monitored temperature loss is more than or equal to 6 ℃ and delta t is more than 4 ℃, controlling the power of the electromagnetic heating pipe 5-2 to be 2000W;
when the monitored temperature loss is more than or equal to 8 ℃ and delta t is more than 6 ℃, controlling the power of the electromagnetic heating pipe 5-2 to be 2500W;
when the monitored temperature loss is more than or equal to 10 ℃ and delta t is more than 8 ℃, controlling the power of the electromagnetic heating pipe 5-2 to be 3000W.
Referring to fig. 1 and 2, the method for controlling the flow rate of spraying two-component materials further comprises the step of adding an ultrasonic generator 1 to a charging bucket 2 of A, B two materials, wherein the ultrasonic generator 1 is an ultrasonic generator with adjustable frequency, and the frequency of the ultrasonic generator 1 is adjusted to meet the requirement of smooth transmission in materials with different components, so that ultrasonic waves introduced into the charging bucket 2 can stir the materials, and the ultrasonic cleaning can be applied to objects with complicated surface shapes and difficult cleaning (such as precise objects with holes, slits, grooves, micropores, blind holes and the like on the surface), so that the ultrasonic waves introduced into the charging bucket 2 can clean a conveying pipeline and a spray head 5-1 along with the transmission of the materials.
Claims (10)
1. The utility model provides an on-vehicle two ingredient material nozzle assembly, includes the front and back symmetrical arrangement's two parts, they feed through material conveying line respectively with material jar (2) of A material and B material, wherein each part all is equipped with a plurality of groups of transverse arrangement and sprays unit (5), characterized by: each injection unit (5) is provided with a spray head (5-1), a flow control valve (5-8), a micro motor (5-5) and a lead screw nut transmission mechanism; the micro motor (5-5) is arranged below a cross beam at the tail part of the spraying vehicle through a fixed support (5-4), and an output shaft of the micro motor is fixedly connected with a screw rod (5-6) in a screw rod nut transmission mechanism; a lead screw (5-6) in the lead screw nut transmission mechanism is provided with thread turn scale, and a nut matched with the lead screw is a rectangular nut (5-7); the spray head (5-1) is provided with a spray hole (5-1-2), the feed port end of the spray hole (5-1-2) is communicated with a material conveying pipeline, the discharge port end of the spray hole is provided with an arc-shaped surface diversion port (5-1-3), and the middle part of the spray hole (5-1-2) is provided with a flow control valve moving channel (5-1-1) which is vertically crossed with the spray hole; the flow control valve (5-8) is a cylindrical rod, one end of the flow control valve is fixedly assembled with a rectangular nut (5-7) in the screw nut transmission mechanism, and the other end of the flow control valve is a ball valve core extending into a flow control valve moving channel (5-1-1) of the spray head (5-1).
2. The vehicular two-component material nozzle assembly according to claim 1, wherein: an electromagnetic heating pipe (5-2) is further arranged in the injection unit (5), and the electromagnetic heating pipe (5-2) is hermetically connected with a feed inlet end of an injection hole (5-1-2) of the spray head (5-1).
3. The vehicular two-component material nozzle assembly according to claim 2, wherein: and a flow control valve supporting seat (5-3) is further arranged in the injection unit (5), the flow control valve supporting seat (5-3) is installed below a beam at the tail part of the spraying vehicle through a fixing support (5-4), a flow control valve through hole is formed in the flow control valve supporting seat (5-3), and a sliding bearing is arranged in the flow control valve through hole.
4. The vehicular two-component material nozzle assembly according to claim 2 or 3, wherein: in each part of the front and back symmetrical arrangement, the number of the transversely arranged spraying units (5) is not less than four groups, and the spraying units are arranged on the spraying pipes (5) communicated with the material conveying pipeline at set angles.
5. The vehicular two-component material nozzle assembly according to claim 1, wherein: material flow pumps (3) are arranged in material conveying pipelines communicated with the material tanks (2) of the material A and the material B.
6. A method for controlling the spraying flow of a two-component material is characterized by comprising the following steps: by means of a spraying vehicle provided with the vehicle-mounted two-component material nozzle assembly as claimed in any one of claims 1 to 5, when A, B two materials are sprayed at different speeds, A, B two materials are atomized and mixed by the two-component material nozzle assembly, the flow condition of the spray head (5-1) in each group of spray units (5) is monitored in real time by means of a flow sensor, the monitored flow information of the spray head (5-1) in each group of spray units (5) is compared with the set value of the flow of the spray head under the working condition, a PID control system controls the action of a micro motor in each group of spray units (5) according to the difference condition of the two, the control of the opening degree of a flow control valve (5-8) is realized, and the adjustment of the flow of the spray head is completed, and the specific control parameters are as follows:
in an initial state, the vehicle speed is 0km/h, a rectangular nut (5-7) in a screw nut transmission mechanism is positioned at the foremost position of a screw (5-6), the thread scale of the screw is 0, and at the moment, a ball valve core of a flow control valve (5-8) in an injection unit (5) completely blocks an injection hole (5-1-2), so that no material is injected from a nozzle;
when the vehicle speed is increased to 0-2 km/h, the micro motor (5-5) drives the screw nut transmission mechanism to operate, the rectangular nut (5-7) moves backwards to the position where the screw thread scale is 0-4 circles, the ball valve core of the flow control valve (5-8) in the injection unit (5) partially plugs the injection hole (5-1-2), and the flow of the material sprayed out of the spray head (5-1) of each group of injection units (5) is 0-222 ml/s;
when the vehicle speed is increased to 2-4 km/h, the micro motor (5-5) drives the screw nut transmission mechanism to operate, the rectangular nut (5-7) moves backwards to the position where the thread scale of the screw is 4-8 circles, the ball valve core of the flow control valve (5-8) in the injection unit (5) partially plugs the injection hole (5-1-2), and the flow of the material sprayed out of the spray head (5-1) of each group of injection units (5) is 222-444 ml/s;
when the vehicle speed is increased to 4-6 km/h, the micro motor (5-5) drives the screw nut transmission mechanism to operate, the rectangular nut (5-7) moves backwards to the position where the thread scale of the screw is 8-12 circles, the ball valve core of the flow control valve (5-8) in the injection unit (5) partially plugs the injection hole (5-1-2), and the flow of the material sprayed out of the spray head (5-1) of each group of injection units (5) is 444-666 ml/s;
when the vehicle speed is increased to 6-8 km/h, the micro motor (5-5) drives the screw nut transmission mechanism to operate, the rectangular nut (5-7) moves backwards to the position where the scales of the screw threads are 12-16 circles, the ball valve core of the flow control valve (5-8) in the injection unit (5) partially plugs the injection hole (5-1-2), and the flow of the material sprayed out of the spray head (5-1) of each group of injection units (5) is 666-888 mL/s mL.
7. The method for controlling the flow rate of spraying the two-component material according to claim 6, which is characterized in that: the spraying angle and the spraying coverage area can be controlled according to the position of a spray head (5-1) in each spraying unit (5), and the specific control parameters are as follows:
when the distance b =300mm between the spray heads in two adjacent spray units and the distance H =250mm between the spray head (5-1) and the spray ground, the spray angle 2 alpha = 45-49.6 degrees of each spray head, so that the area of the spray coverage area is 2.4-2.6 m2；
When the distance b =300mm between the spray heads in two adjacent spray units and the distance H =300mm between the spray head (5-1) and the spray ground, the spray angle 2 alpha = 38.1-42.1 degrees of each spray head makes the area of the spray coverage area be 2.6-2.8 m2；
When the distance b =350mm between the spray heads in two adjacent spray units and the distance H =250mm between the spray head (5-1) and the spray ground, the spray angle 2 alpha = 54.7-60 degrees of each spray head, so that the area of the spray coverage area is 2.8-3 m2；
When the distance b =350mm between the spray heads in two adjacent spray units and the distance H =300mm between the spray head (5-1) and the spray ground, the spray angle 2 alpha = 46.7-51.4 degrees of each spray head, so that the area of a spray coverage area in unit time is 3-3.2 m2。
8. The method for controlling the flow rate of spraying the two-component material according to claim 6, which is characterized in that: it still sprays the temperature to ground through the infrared temperature measuring device monitoring material of installation bottom the spray truck, and specific control parameter is as follows:
when the monitored temperature loss delta t is less than or equal to 2 ℃, controlling the power of the electromagnetic heating pipe (5-2) to be 1000W;
when the monitored temperature loss is more than or equal to 4 ℃ and delta t is more than 2 ℃, controlling the power of the electromagnetic heating pipe (5-2) to be 1500W;
when the monitored temperature loss is more than or equal to 6 ℃ and delta t is more than 4 ℃, controlling the power of the electromagnetic heating pipe (5-2) to be 2000W;
when the monitored temperature loss is more than or equal to 8 ℃ and delta t is more than 6 ℃, controlling the power of the electromagnetic heating pipe (5-2) to be 2500W;
when the monitored temperature loss is more than or equal to 10 ℃ and delta t is more than 8 ℃, the power of the electromagnetic heating pipe (5-2) is controlled to be 3000W.
9. The method for controlling the flow rate of spraying the two-component material according to claim 6, which is characterized in that: the ultrasonic wave generator (1) is additionally arranged on the material tank (2) of A, B two materials, so that ultrasonic waves introduced into the material tank (2) are used for stirring the materials, and the conveying pipeline and the spray head (5-1) are cleaned along with the transmission of the materials.
10. The method for controlling the flow rate of spraying the two-component material according to claim 9, which is characterized in that: the ultrasonic wave generating device (1) is an ultrasonic wave generator with adjustable frequency, and the requirement of smooth transmission in materials with different components is met by adjusting the frequency of the ultrasonic wave generator.
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| CN114016416B (en) | 2023-09-29 |
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