CN220371400U

CN220371400U - Polyurethane spraying device for heat preservation layer of refrigeration house

Info

Publication number: CN220371400U
Application number: CN202322335583.0U
Authority: CN
Inventors: 刘家胜; 兰云睆; 于龙飞; 杨英艇; 苏博; 殷少鹏; 王磊
Original assignee: China Construction Third Bureau Construction Engineering Co Ltd
Current assignee: China Construction Third Bureau Group Co Ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-01-23
Anticipated expiration: 2033-08-30

Abstract

The utility model discloses a polyurethane spraying device for a heat preservation layer of a refrigeration house, which comprises the following components: ground rail, trolley and spraying mechanism; the bottom of the trolley is provided with a sliding component which is in sliding connection with the ground rail; the spraying mechanism includes: the device comprises a support frame, a first template, a second template, a rotating shaft, an adjusting bracket, a plurality of nozzles and a plurality of nozzle covers; the first template and the second template are connected through a rotating shaft; the rotating shaft is connected with the supporting frame through the adjusting bracket; the support frame is arranged above the trolley, and the rotating shaft is parallel to the support frame; at least one nozzle is arranged on the first template, the second template and the rotating shaft, and the nozzle is externally connected with a polyurethane foam source through a pipeline; the nozzle cover is arranged corresponding to the nozzle and is movably connected with the nozzle. The first template and the second template are rotated to enable the included angle of the first template and the second template to be consistent with the included angle of the region to be sprayed all the time, so that the thickness uniformity of the polyurethane layer is achieved; and the first template and the second template are utilized to correct the polyurethane layer, so that the uniformity of the polyurethane layer is improved, and the spraying and correcting integrated operation is realized.

Description

Polyurethane spraying device for heat preservation layer of refrigeration house

Technical Field

The utility model relates to the technical field of polyurethane spraying equipment, in particular to a polyurethane spraying device for a heat insulation layer of a refrigeration house.

Background

The polyurethane spraying heat-insulating material is an important branch of polyurethane industry, has the functions of heat insulation, water resistance and the like, is widely used as a heat-insulating material for constructing a refrigeration house in China, can avoid heat exchange between the inside and the outside of the refrigeration house to the greatest extent, and effectively reduces the loss of refrigerating capacity.

CN210067362U discloses an adjustable automatic spraying machine with screw driven scissor fork type lifting spraying, which comprises a movable frame, a lower frame platform, a lifting mechanism, a driving mechanism and a spraying mechanism assembly; the movable frame is used for moving the automatic spraying machine; the lower frame platform is arranged on the movable frame; the lifting mechanism is arranged on the lower frame platform; the driving mechanism is used for driving the lifting mechanism to stretch up and down; the spraying mechanism assembly comprises a supporting plate fixed at the top of the lifting mechanism, a mounting plate vertically connected with the supporting plate, a spray head frame vertically fixed on the mounting plate, a spray head rotatably mounted on the spray head frame and an adjusting cylinder for adjusting the spray head to rotate at an angle. The three-dimensional spraying of the wall surface is realized through the movable frame and the lifting framework, so that the manual participation can be reduced; the spray head can rotate 180 degrees by using the adjusting cylinder, so that the corner spraying of the wall surface can be effectively performed, and no spraying dead angle is left. Because polyurethane foam can produce inhomogeneous flow, so the polyurethane layer roughness that forms is relatively poor, consequently, need to correct the polyurethane layer, above-mentioned flush coater can't realize spraying operation and correction operation collaborative work.

Disclosure of Invention

In order to better realize polyurethane layer spraying and correction integrated operation, the embodiment of the application provides a refrigerator heat preservation polyurethane spraying device.

The embodiment of the application provides a freezer heat preservation polyurethane spraying device, include: ground rail, trolley and spraying mechanism;

the bottom of the trolley is provided with a sliding component which is in sliding connection with the ground rail;

the spraying mechanism includes: the device comprises a support frame, a first template, a second template, a rotating shaft, an adjusting bracket, a plurality of nozzles and a plurality of nozzle covers;

the first template and the second template are connected through a rotating shaft;

the rotating shaft is connected with the supporting frame through an adjusting bracket;

the support frame is arranged above the trolley, and the rotating shaft is parallel to the support frame;

at least one nozzle is arranged on the first template, the second template and the rotating shaft, and the nozzle is externally connected with a polyurethane foam source through a pipeline;

the nozzle cover is arranged corresponding to the nozzle, and is movably connected with the nozzle.

In one or some optional implementations of the embodiments of the present application, the device further includes a base;

the base is arranged above the trolley and is connected with the trolley in a sliding manner, and the support frame is connected to the base;

the top of the trolley is provided with a plurality of first sliding grooves which are parallel to each other, and the bottom of the base is correspondingly provided with sliding parts matched with the first sliding grooves;

the length direction of the first sliding groove is perpendicular to the length direction of the ground rail.

In one or some optional implementations of the embodiments of the present application, the base is connected to a driving mechanism, and the driving mechanism drives the base to slide;

the driving mechanism comprises a rack, a driving motor and a gear;

the rack is arranged on the base, the driving motor is fixed on the base, the driving motor is connected with the gear, and the gear is meshed with the rack.

In one or some optional implementations of the embodiments of the present application, the spray mechanism further includes: at least one group of driving components for driving the first template and the second template to rotate around the rotating shaft;

the driving assembly comprises a first driving piece and a second driving piece which are symmetrically distributed along the rotating shaft;

one end of the first driving piece is connected with the first template, and the other end of the first driving piece is connected with the adjusting bracket;

one end of the second driving piece is connected with the second template, and the other end of the second driving piece is connected with the adjusting bracket;

the first driving piece and the second driving piece drive the first template and the second template to be switched into a coplanar state or an internal angle state.

In one or some alternative implementations of the embodiments of the present application, the sliding assembly includes a plurality of rotatable guides disposed at a bottom of the cart, the guides having slide holes that mate with the ground rails.

In one or some optional implementations of the embodiments of the present application, the sliding component is a second chute that is disposed along a length direction of the ground rail, the second chute is matched with the ground rail, a width of the second chute is greater than a width of the ground rail, and a top of the second chute is rotationally connected with a bottom of the trolley.

In one or some optional implementations of the embodiments of the present application, the sliding component is a universal wheel, and the universal wheel is in rolling connection with the ground rail;

a groove is formed in the circumference of the universal wheel, the ground rail is clamped with the groove, the cross section of the groove is consistent with that of the ground rail, and the width of the groove is larger than that of the ground rail; when the universal wheel rolls, the slotting is always abutted with the ground rail.

In one or some optional implementations of the embodiments of the present application, the support frame includes a vertical support bar and a reinforcing truss;

the vertical support rods are connected to the base, and two adjacent vertical support rods are connected with the reinforcing truss.

In one or some alternative implementations of the embodiments of the present application, the support frame is formed by a plurality of standard joints movably connected.

In one or some optional implementations of the embodiments of the present application, the first template, the second template and the rotating shaft are all provided with a plurality of nozzle holes that are sequentially arranged at intervals along the gravity direction, the nozzle holes are correspondingly provided with the nozzles, and the outlet ends of the nozzles are arranged in the nozzle holes.

The beneficial effects of the technical scheme provided by the embodiment of the application at least comprise:

the embodiment of the application provides a freezer heat preservation polyurethane spraying device can treat the spraying region and carry out spraying operation to make it switch into coplanarity state or reentrant angle state through rotating first template and second template, make the contained angle of first template and second template unanimous with the contained angle of treating the spraying region all the time, realize that polyurethane layer thickness is even: when the plane part of the area to be sprayed is sprayed, the first template and the second template are adjusted to be parallel to the plane part, so that the distance between each nozzle and the plane part is consistent, and the thickness consistency of the polyurethane layer is ensured; when the corner part of the area to be sprayed is sprayed, the first template and the second template are adjusted to enable the included angle of the first template and the second template to be consistent with the included angle of the corner part, the rotating shaft is aligned with the protruding part of the corner, and the first template and the second template are respectively parallel to the plane areas at two sides of the corner and are consistent in distance to ensure that the thickness of the sprayed polyurethane layer at the plane areas at two sides of the corner is consistent, so that the thickness of the polyurethane layer of the whole area to be sprayed is uniform; meanwhile, the nozzle cover is used for covering the nozzle, the first template and the second template are used for correcting the polyurethane layer, accumulation of uneven spraying areas can be effectively slowed down, uniformity of the polyurethane layer is improved, and the polyurethane layer has good flatness. In conclusion, the spraying and correction integrated operation can be realized by utilizing the device, and the polyurethane layer has better flatness.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

The technical scheme of the present application is described in further detail below through the accompanying drawings and examples.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, and not constitute a limitation to the application. In the drawings:

FIG. 1 is a schematic perspective view of the present application;

FIG. 2 is a perspective view of the first and second templates rotated to the inside corner state;

FIG. 3 is a schematic top view of the first and second templates of the present application rotated to an inside corner state;

FIG. 4 is a schematic view of a ground rail mating trolley of the present application;

FIG. 5 is a schematic perspective view of the first and second templates of the present application in a coplanar state;

FIG. 6 is a schematic front view of the first and second templates of the present application in a coplanar state;

FIG. 7 is a schematic illustration of a drive assembly of the present application connecting a first die plate, a second die plate, and an adjustment bracket;

FIG. 8 is a schematic view of the nozzle distribution position of the present application;

FIG. 9 is a schematic view of a limiting portion provided on a ground rail of the present application;

FIG. 10 is a schematic top view of the working principle of the corrected polyurethane layer of the present application;

the device comprises a ground rail 1, a trolley 2, a base 3, a support frame 4, an adjusting bracket 5, a first template 61, a second template 62, a nozzle 7, a rotary shaft 8, a driving assembly 9, a first driving piece 91, a second driving piece 92, a polyurethane layer 10, a limiting part 11, a guide piece 12 and a second chute 13.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As used in this specification and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".

In addition, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

It should be understood that the sequence numbers of the steps in the following embodiments do not mean the order of execution, and the execution order of the processes should be determined by the functions and the internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In order to illustrate the technical solution of the present application, the following description is made by specific examples.

The inventor finds that in the prior art, when a screw rod driving scissor type lifting and fork type adjustable automatic spraying machine disclosed in CN210067362U is adopted for spraying operation, polyurethane foam is locally accumulated or locally lost in a region to be sprayed due to nonuniform flow, the volume of the polyurethane foam is further increased after the polyurethane foam is expanded in the locally accumulated region, so that obvious raised regions are formed on the surface of a polyurethane layer, obvious recessed regions are formed in the locally lost region, meanwhile, the lost polyurethane foam falls to other regions to form punctiform bulges, and the nonuniform degree of the polyurethane layer is increased. Therefore, the polyurethane layer needs to be corrected to achieve better flatness. However, the prior art lacks a device capable of simultaneously performing the painting operation and the correction operation.

The inventor has further developed and made the application to provide a polyurethane spraying device for a heat insulation layer of a refrigeration house, and the polyurethane spraying device is described in detail through specific embodiments.

In a specific embodiment, when spraying is performed on a corner portion of a to-be-sprayed area, the embodiment of the application provides a polyurethane spraying device for a thermal insulation layer of a refrigeration house, which comprises the following components: ground rail 1, trolley 2 and spraying mechanism;

the bottom of the trolley 2 is provided with a sliding component which is in sliding connection with the ground rail 1;

the spraying mechanism includes: the device comprises a support frame 4, a first template 61, a second template 62, a rotating shaft 8, an adjusting bracket 5, a plurality of nozzles 7 and a plurality of nozzle covers;

the first template 61 and the second template 62 are connected through a rotating shaft 8;

the rotating shaft is connected with the supporting frame 4 through an adjusting bracket 5;

the support frame 4 is arranged above the trolley 2, and the rotating shaft is parallel to the support frame 4;

at least one nozzle 7 is arranged on the first template 61, the second template 62 and the rotating shaft 8, and the nozzle 7 is externally connected with a polyurethane foam source through a pipeline;

the nozzle cover is arranged corresponding to the nozzle 7, and is movably connected with the nozzle 7.

In this embodiment, as shown in fig. 1, a ground rail 1 is spaced from a region to be sprayed by a proper distance, a trolley 2 is slidably connected with the ground rail 1 through a sliding component, a support frame 4 is perpendicular to the trolley 2 and is connected with the trolley 2, a spraying mechanism is connected with the support frame 4, the spraying mechanism comprises a first template 61 and a second template 62 which are rotatably connected through a rotating shaft 8, the rotating shaft 8 is connected with the support frame 4 through an adjusting bracket 5, and a nozzle cover (not shown in the figure) which is movably connected with each nozzle 7 is correspondingly arranged.

In a specific embodiment, the ground rail 1 may be provided as, but is not limited to, two mutually parallel ground rails 1, the ground rail 1 includes parallel sections and arc sections, the parallel sections of the ground rail 1 are in smooth connection with the arc sections of the ground rail 1, wherein the length direction of the parallel sections of the ground rail 1 are parallel to the plane portion of the painting area, and the arc sections of the ground rail 1 are provided at corner portions of the painting area. Assuming that a port is formed on a plane of the region to be sprayed, paving a closed ground rail 1 on the outer edge of the region to be sprayed, and forming a return path on the plane of the region to be sprayed and the ground rail 1. The bottom of the trolley 2 is provided with the sliding component which is rotationally connected with the trolley, so that the trolley 2 can smoothly slide on the parallel section and the arc section of the ground rail 1, and can circularly move on the ground rail 1 to spray the region to be sprayed back and forth, wherein the trolley 2 can be rotationally connected with the sliding component by adopting but not limited to a universal connector in the prior art; when the trolley 2 moves on the plane part of the area to be sprayed, the trolley 2 always keeps parallel to the area to be sprayed, and when the trolley 2 moves to the corner part of the area to be sprayed, the trolley 2 is rotationally connected with the sliding rotating piece, so that the body of the trolley 2 can be rotated, and turning of the trolley 2 is realized. A drive motor of the prior art may be used, but is not limited to, in connection with the trolley 2 to provide the driving force for the trolley 2. Two groups of wheels can be symmetrically arranged at the bottom of the trolley 2 to be matched with the ground rail 1, and the wheels can provide counter force, so that the trolley has good stability and can be prevented from overturning and derailing the trolley 2.

In a specific embodiment, the polyurethane foam source may provide polyurethane foam using foaming equipment of the prior art. The foaming equipment can be arranged on the trolley 2 and is respectively communicated with each nozzle 7 through a plurality of pipelines, and the pipelines are provided with control valves, so that the spraying pressure and the spraying speed of the nozzles 7 can be controlled to control the thickness of the polyurethane layer sprayed by the foaming equipment.

In a specific embodiment, one end of the adjusting bracket 5 is connected with the supporting frame 4, the other end is connected with the rotating shaft 8, as shown in fig. 3 or fig. 4, the adjusting bracket 5 is in a cantilever structure, meanwhile, the length of the adjusting bracket 5 can be adjusted, and the length of the adjusting bracket is adjusted to enable the first template 61 and the second template 62 to form a proper distance with the supporting frame 4, so that the following rotation of the first template 61 and the second template 62 is facilitated; by reasonably adjusting the length of the adjusting bracket 5, the instability of the base 3 or the trolley 2 caused by overlong cantilever can be avoided.

In a specific embodiment, the first template 61 and the second template 62 are flat plates, and the first template 61 and the second template 62 are switched to a coplanar state or an internal angle state by rotating the first template 61 and the second template 62, so that the included angle between the first template 61 and the second template 62 is consistent with the included angle between the areas to be sprayed all the time, and when the first template 61 and the second template 62 rotate, the rotating shaft 8 is kept fixed relative to the adjusting bracket 5 all the time: when the plane part of the area to be sprayed is sprayed, the first template 61 and the second template 62 are adjusted to be parallel to the plane part, so that the distance between each nozzle 7 and the plane part is consistent, and the thickness consistency of the polyurethane layer is ensured; when the corner part of the area to be sprayed is sprayed, the first template 61 and the second template 62 are rotated to enable the included angle of the first template 61 and the second template to be consistent with the included angle of the corner part, the rotating shaft 8 is aligned with the protruding part of the corner, and the first template 61 and the second template 62 are respectively parallel to the plane areas on two sides of the corner and are consistent in distance to ensure that the thickness of the sprayed polyurethane layers on the plane areas on two sides of the corner is consistent, so that the thickness of the whole polyurethane layer of the area to be sprayed is uniform.

In a specific embodiment, each nozzle 7 is correspondingly provided with a nozzle cover (not shown in the drawing) movably connected with the nozzle, the nozzle cover comprises a top cover and a side cover which are integrally formed, and the movable connection mode of the nozzle cover and the nozzle 7 can be adopted but is not limited to the following modes: the outer periphery of the side cover of the nozzle cover is in threaded connection with the inner wall of the nozzle 7, and the nozzle 7 is covered or uncovered by screwing in or screwing out the nozzle cover; the side cover of the nozzle cover adopts flexible materials, the outer periphery of the side cover is provided with a bulge, the inner wall of the nozzle 7 is correspondingly provided with a groove, the nozzle cover is pushed into the nozzle 7, and the nozzle 7 is covered by clamping the bulge and the groove to fix the position of the nozzle cover. It is noted that the top cover of the nozzle cover is always on the same level with the first and second templates 61, 62 when the nozzle cover covers the nozzle 7. The nozzle cover is used for covering the nozzle 7, and when spraying operation is performed on a spraying area, the covering effect of the nozzle cover on the nozzle 7 is released, and polyurethane foam is sprayed from the nozzle 7 to perform the spraying operation; when correction operation is carried out on the spraying area, the nozzle cover is used for shielding the nozzle 7, so that the first template 61 and the second template 62 form a flat plate without hollowed-out parts, and the first template 61 and the second template 62 have the function of limiting the polyurethane foam to further expand at the moment because the polyurethane foam expands, so that the integral polyurethane foam expands uniformly, the accumulation of uneven spraying areas can be effectively slowed down, the uniformity of the polyurethane layer 10 is improved, the bulges and pits on the surface of the polyurethane layer 10 are effectively reduced, and the polyurethane layer 10 has better flatness, thereby achieving the effect of correcting the polyurethane layer 10. The spraying and correction integrated operation can be realized through the embodiment, and the polyurethane layer 10 has better flatness.

In the embodiment of the application, the device further comprises a base 3, wherein the base 3 is arranged above the trolley 2 and is in sliding connection with the trolley 2, and the support frame 4 is connected to the base 3;

the top of the trolley 2 is provided with a plurality of first sliding grooves which are parallel to each other, and the bottom of the base 3 is correspondingly provided with sliding parts matched with the first sliding grooves;

the length direction of the first sliding groove is perpendicular to the length direction of the ground rail 1, and when the base 3 slides along the trolley 2, the maximum sliding travel of the base is larger than the preset thickness value of the polyurethane layer 10 in the to-be-sprayed area.

In a specific embodiment, as shown in fig. 1 and 2, assuming that the running direction of the trolley 2 along the ground rail 1 is the X direction, the moving direction of the base 3 relative to the trolley 2 is the Y direction, and the length direction of the support frame 4 is the Z direction. The first sliding grooves are at least two, the sliding parts are arranged corresponding to the first sliding grooves, the sliding parts slide along the first sliding grooves, the shapes of the first sliding grooves can be dovetail shapes, T shapes, U shapes, V shapes and the like, and the shapes of the sliding parts are matched with those of the first sliding grooves.

In a specific embodiment, but not limited to, an electric cylinder in the prior art may be used to provide a driving force for the base 3, one end of the electric cylinder is fixed on the trolley 2, the other end of the electric cylinder is connected to the base 3, and the telescopic movement of the electric cylinder drives the base 3 to slide back and forth along the first chute.

In the embodiment of the application, the base 3 is connected with a driving mechanism, and the driving mechanism drives the base 3 to slide;

the driving mechanism comprises a rack, a driving motor and a gear;

the rack is arranged on the base 3, the driving motor is fixed on the base 3, the driving motor is connected with the gear, and the gear is meshed with the rack.

In a specific embodiment, besides the above-mentioned use of an electric cylinder to provide driving force for the base 3, other transmission mechanisms can be used to drive the base 3 to slide, for example, a rack is arranged on the base 3, a motor is arranged on the trolley 2, a gear is connected to an output shaft of the motor, the gear is meshed with the rack, and when the motor is forward or reverse, the gear is driven to forward or reverse, and the gear drives the rack meshed with the gear to move, so that the base 3 is driven to slide on the trolley 2. Therefore, by sliding the base 3, the distance between the base 3 and the area to be sprayed is changed, so that the distance between the nozzles 7 on the first template 61 and the second template 62 and the area to be sprayed is adjusted, the position of spraying polyurethane foam is changed, the thickness of the sprayed multilayer polyurethane layer is changed, and the nozzles 7 are always in proper positions.

In an embodiment of the present application, the spraying mechanism further includes: at least one set of driving assemblies 9 for driving the first and second templates 61 and 62 to rotate about the rotation axis 8;

the driving assembly 9 comprises two first driving parts 91 and second driving parts 92 symmetrically distributed along the rotating shaft 8;

one end of the first driving member 91 is connected to the first mold plate 61, and the other end of the first driving member 91 is connected to the adjusting bracket 5;

one end of the second driving member 92 is connected with the second template 62, and the other end of the second driving member 92 is connected with the adjusting bracket 5;

the first driving member 91 and the second driving member 92 drive the first template 61 and the second template 62 to be switched into a coplanar state or an internal angle state, so that the included angle between the first template 61 and the second template 62 is consistent with the included angle of the region to be sprayed all the time, and the thickness uniformity of the polyurethane layer is ensured.

In a specific embodiment, the first driving member 91 and the second driving member 92 may be, but are not limited to, an oil cylinder, an air cylinder, or an electric cylinder in the prior art, and taking the air cylinder as a driving force as an example, the first driving member 91 is a first air cylinder, the second driving member 92 is a second air cylinder, and the first mold plate 61 and the second mold plate 62 are driven to rotate mutually by the expansion and contraction of the first air cylinder and the second air cylinder, as shown in fig. 5 and 6, when the first air cylinder and the second air cylinder are in an extended state, the first mold plate 61 and the second mold plate 62 are in a coplanar state; as shown in fig. 2 and 3, when the first cylinder and the second cylinder are in the contracted state, the first mold plate 61 and the second mold plate 62 are in the inside corner state. Limiting blocks are respectively arranged on the first cylinder and the second cylinder, so that excessive expansion and contraction of the limiting blocks are avoided.

In the present embodiment, the sliding assembly comprises a plurality of rotatable guides 12 arranged at the bottom of the trolley 2, wherein the guides 12 are provided with sliding holes matching the ground rail 1.

In a specific embodiment, as shown in fig. 4, a plurality of guiding elements 12 are arranged at the bottom of the trolley 2, sliding holes through which the ground rail 1 can pass are arranged on the guiding elements 12, and the sliding holes slide along the ground rail 1 to realize the movement of the trolley 2 on the ground rail 1. Meanwhile, the sliding hole plays a certain limiting role on the trolley 2, and can effectively prevent the trolley 2 from overturning and derailing.

In this embodiment, the sliding component is a second chute 13 that sets up along the length direction of ground rail 1, second chute 13 with ground rail 1 assorted, the width of second chute 13 is greater than the width of ground rail 1, the top of second chute 13 with the bottom of dolly 2 rotates to be connected. The shape of the second runner 13 may be, but is not limited to, dovetail, T-shaped, U-shaped, V-shaped, etc., and the shape of the ground rail 1 matches the shape of the second runner 13. Meanwhile, a limit part 11 can be arranged on the ground rail 1, taking the dovetail-shaped ground rail 1 as an example for explanation, as shown in fig. 9, a cylindrical limit part 11 is fixedly connected on the ground rail 1, the lower part of the second sliding groove 13 is in a dovetail shape, the upper part of the second sliding groove 13 is in a cylindrical shape, and the limit part 11 can well limit the position of the second sliding groove 13 to improve the anti-overturning and anti-derailing capabilities in matching with the ground rail 1.

In the embodiment of the application, the sliding component is a universal wheel, and the universal wheel is in rolling connection with the ground rail 1; the universal wheel is provided with a slot along the circumferential direction of the universal wheel, the ground rail 1 is clamped with the slot, the section shape of the slot is consistent with that of the ground rail 1, and the width of the slot is larger than that of the ground rail 1; when the universal wheel rolls, the slotting is always abutted with the ground rail 1. The shape of the slot may take the form of, but is not limited to, a dovetail, a T, a U, a V, etc. When the universal wheels roll along the ground rail 1, the trolley 2 is driven to move on the ground rail 1, the slotting is matched with the ground rail 1, a certain limiting effect can be achieved on the trolley 2, overturning and derailing of the trolley can be prevented, meanwhile, the turning of the trolley 2 at the corner part of the to-be-sprayed area can be achieved by adopting the universal structure, and the fact that the trolley 2 is always kept parallel to the to-be-sprayed area when the trolley 2 moves at the plane part of the to-be-sprayed area is remarkable.

In this embodiment, as shown in fig. 1, 2 or 5, the supporting frame 4 includes a vertical supporting rod and a reinforcing truss; the vertical support rods are connected to the base 3, and two adjacent vertical support rods are connected with the reinforcing truss.

In a specific embodiment, the support frame 4 is arranged along the Z direction, and comprises vertical support rods and reinforcing trusses, wherein the vertical support rods are connected with the base 3, two adjacent vertical support rods are connected with the reinforcing trusses, the reinforcing trusses are of triangular structures, the stability of the vertical support rods is assisted, and the shearing resistance and the bending resistance of the vertical support rods are improved, so that the whole support frame 4 can meet the strength and stability requirements of a bearing spraying mechanism.

In the embodiment of the present application, the support frame 4 is formed by movably connecting a plurality of standard knots. The support frame 4 is arranged along the Z direction, as shown in fig. 1 or fig. 2, the support frame 4 may be formed by splicing standard sections with triangular sections or quadrangular sections, and the standard section at the bottom of the support frame is fixed with the base 3. Fixedly connecting the spraying mechanism with one or two standard joints, and adding or detaching the standard joint from the lower part of the standard joint connected with the spraying mechanism when the standard joint is increased or decreased; meanwhile, in order to facilitate the rotation of the first and second templates 61 and 62 later, one edge of the support frame 4 is preferably directed toward the first and second templates 61 and 62.

In a specific embodiment, the standard joint is used as the supporting frame 4, so that the bearing capacity and the overall strength can be improved, and the shaking of the spraying assembly in the working process can be reduced. Meanwhile, the height of the supporting frame 4 can be changed by increasing or decreasing the standard section, so that the height of a spraying mechanism connected with the supporting frame 4 is adjusted, and spraying operation is performed on areas to be sprayed at different height positions.

In this embodiment, the first template 61, the second template 62 and the rotating shaft 8 are provided with a plurality of nozzle holes sequentially arranged at intervals along the gravity direction, the nozzle holes are correspondingly provided with the nozzles 7, and the outlet ends of the nozzles 7 are arranged in the nozzle holes.

In one embodiment, as shown in fig. 8, since the polyurethane foam expands, in order to avoid the polyurethane foam expanding to contact the nozzle 7 to cause the blocking of the nozzle 7, the outlet end of the nozzle 7 is disposed in the nozzle hole, i.e., the nozzle 7 is slightly inserted into the nozzle hole, so that the polyurethane foam sprayed on the area to be sprayed does not contact with the nozzle 7 after it expands.

In a specific embodiment, a plurality of rows of nozzles 7 distributed at intervals in the horizontal direction may be disposed on the first template 61 and the second template 62, and three rows of nozzles 7 are taken as an example for illustration, and three rows of collision nozzles are disposed on the first template 61 and the second template 62 at intervals, and when the trolley 2 moves, all the nozzles 7 work simultaneously, which is equivalent to finishing three spraying of polyurethane layers with equal thickness in the spraying area.

The working principle of the utility model is as follows: when the plane part of the area to be sprayed is sprayed, the driving mechanism is driven to adjust the distance between the base 3 and the area to be sprayed to a proper position, the first driving piece 91 and the second driving piece 92 are driven to enable the first template 61 and the second template 62 to be switched to a coplanar state, the trolley 2 is driven to move circularly along the ground rail 1, the switch of the polyurethane foam source is opened, a plurality of polyurethane layers are sprayed on the plane part of the area to be sprayed circularly, and after foaming and solidification of each polyurethane foam layer are completed, the next polyurethane layer is sprayed; when the trolley 2 moves to the corner part of the area to be sprayed along the ground rail 1 circularly, the first driving piece 91 and the second driving piece 92 are driven to enable the first template 61 and the second template 62 to be switched into an internal angle state, the included angle between the first template 61 and the second template 62 is consistent with the included angle between the corner part, a switch of a polyurethane foam source is opened, polyurethane foam is sprayed, wherein a nozzle 7 arranged on a rotating shaft 8 is aligned with the protruding position of the corner part, and the protruding position of the corner part is sprayed by the nozzle 7 on the rotating shaft 8; after the spraying is finished, the thickness of the formed polyurethane layer 10 is close to a preset thickness value, the polyurethane layer 10 is corrected, as shown in fig. 10, after the raised area on the polyurethane layer 10 is cut off, polyurethane foam is sprayed, then a nozzle cover is used for covering a nozzle 7, the included angle between the first template 61 and the second template 62 is kept consistent with the included angle of the area to be sprayed, the first template 61 and the second template 62 are contacted with the sprayed polyurethane foam to keep the expansion uniformity, and the sprayed area after the polyurethane foam is cured is corrected and leveled; the covering effect of the nozzle cover on the nozzle 7 is removed, and the spraying is carried out again on the region to be sprayed by adopting the method, so that the thickness of the whole polyurethane layer 10 of the region to be sprayed reaches a preset thickness value.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The utility model provides a freezer heat preservation polyurethane spraying device which characterized in that includes: ground rail, trolley and spraying mechanism;

the rotating shaft is connected with the supporting frame through the adjusting bracket;

2. The polyurethane spraying device for the heat preservation layer of the refrigerator according to claim 1, further comprising a base;

3. The polyurethane spraying device for the heat preservation layer of the refrigerator according to claim 2, wherein the base is connected with a driving mechanism, and the driving mechanism drives the base to slide;

the driving mechanism comprises a rack, a driving motor and a gear;

4. The polyurethane spraying device for the heat preservation layer of the refrigerator according to claim 1 or 3, wherein the spraying mechanism further comprises: at least one group of driving components for driving the first template and the second template to rotate around the rotating shaft;

the first driving piece and the second driving piece drive the first template and the second template to be switched into a coplanar state or a reentrant angle state.

5. The polyurethane spraying device for the heat preservation of the refrigerator according to claim 4, wherein the sliding assembly comprises a plurality of rotatable guide members arranged at the bottom of the trolley, and the guide members are provided with sliding holes matched with the ground rail.

6. The polyurethane spraying device for the heat preservation layer of the refrigeration house according to claim 4, wherein the sliding component is a second sliding groove arranged along the length direction of the ground rail, the second sliding groove is matched with the ground rail, the width of the second sliding groove is larger than that of the ground rail, and the top of the second sliding groove is rotationally connected with the bottom of the trolley.

7. The polyurethane spraying device for the heat preservation layer of the refrigeration house according to claim 4, wherein the sliding component is a universal wheel, and the universal wheel is in rolling connection with the ground rail;

8. The polyurethane spraying device for the heat preservation layer of the refrigeration house according to claim 2, wherein the supporting frame comprises a vertical supporting rod and a reinforcing truss;

9. The polyurethane spraying device for the heat preservation layer of the refrigeration house according to claim 7, wherein the supporting frame is formed by movably connecting a plurality of standard knots.

10. The polyurethane spraying device for the heat preservation layer of the refrigeration house according to claim 8 or 9, wherein a plurality of nozzle holes are sequentially arranged on the first template, the second template and the rotating shaft at intervals along the gravity direction, the nozzle holes are correspondingly provided with the nozzles, and the outlet end of the nozzle is arranged in the nozzle holes.