A polyurethane on-site spraying device and spraying process for cold storage construction

Abstract

The present invention belongs to the technical field of spraying workbenches, and in particular relates to a polyurethane on-site spraying device and spraying process for cold storage construction. The polyurethane on-site spraying device for cold storage construction of the present invention comprises a supporting mechanism, a spraying mechanism, a traveling mechanism and a driving mechanism, and the linkage mechanism is used to change the spraying position of the spraying mechanism on the supporting mechanism; each time the traveling mechanism travels a stroke, the linkage mechanism can change the spraying position of the spraying mechanism on the supporting mechanism once, and enable the traveling mechanism to travel in reverse for the next stroke. When in use, the polyurethane sprayed by the spraying mechanism can completely cover the plate, thereby completing the spraying of the plate, and does not require the setting of a control system and a control program, and can achieve automatic spraying of the plate, and the manufacturing cost is low. The spraying process of the present invention also does not require the use of a control system and a control program, and can achieve automatic spraying of the plate, and the spraying cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of spraying workbenches, and in particular relates to a polyurethane on-site spraying device and a spraying process for cold storage construction. Background Art

[0002] Polyurethane spray insulation materials are an important branch of the polyurethane industry. They have functions such as thermal insulation and waterproofing. In my country, polyurethane spray insulation materials are mostly used in cold storage construction. They can avoid heat exchange inside and outside the cold storage to the greatest extent and effectively reduce the loss of cooling capacity.

[0003] In the related art, polyurethane spraying often requires workers to use a handheld polyurethane spray foaming machine. This device is labor-intensive and requires high technical skills. To address this issue, Chinese patent CN211143675U discloses an automatic polyurethane spraying mobile platform. This platform eliminates the need for operators to physically operate the spraying site, reducing the technical requirements for operators, achieving high spraying efficiency, and minimizing health risks for operators.

[0004] However, the above-mentioned mobile platform for spraying operations needs to be equipped with a control system and adopt a control program to realize automated spraying, which results in high manufacturing costs. Summary of the Invention

[0005] Based on this, it is necessary to provide a polyurethane on-site spraying device for cold storage construction to address the problems existing in the existing technology, so as to solve the problem of high manufacturing cost of the mobile platform for spraying operations in the existing technology, and also provide a polyurethane on-site spraying process for cold storage construction using the aforementioned spraying device to solve the problem of high cost of the spraying process in the existing technology.

[0006] The above purpose is achieved through the following technical solutions, wherein the technical solution of the polyurethane on-site spraying device for cold storage construction of the present invention is:

[0007] A polyurethane on-site spraying device for cold storage construction comprises: a base; a support mechanism capable of sliding along a guide of the base, the support mechanism being provided with a spraying mechanism for spraying polyurethane onto a plate; a traveling mechanism capable of moving along the surface of the plate and driving the support mechanism to move synchronously; a driving mechanism capable of driving the traveling mechanism to move back and forth on the surface of the plate; a linkage mechanism for changing the spraying position of the spraying mechanism on the support mechanism; each time the traveling mechanism travels a stroke, the linkage mechanism can change the spraying position of the spraying mechanism on the support mechanism once and enable the traveling mechanism to travel in the reverse direction for the next stroke.

[0008] Furthermore, the linkage mechanism includes a frame and a rotating shaft, a groove pulley mechanism and a switching assembly arranged on the frame. The groove pulley mechanism and the spraying mechanism are connected in transmission. The rotating shaft can drive the groove pulley mechanism and the switching assembly to move. The movement of the switching assembly can enable the walking mechanism to switch the walking direction. The groove pulley mechanism enables the spraying mechanism to change the spraying position on the supporting mechanism when the walking mechanism switches the walking direction.

[0009] Furthermore, the switching assembly includes a switching push rod, a switching plate, a hinged rod and a reset assembly. The switching push rod is fixed on the rotating shaft, the switching plate is hinged on the frame, the first end of the hinged rod is hinged to the switching plate, and the second end of the hinged rod is hinged to the driving mechanism. The driving mechanism has a first output position and a second output position. When in the first output position, the driving mechanism moves the walking mechanism forward, and when in the second output position, the driving mechanism moves the walking mechanism backward. When the switching push rod is rotated to the set position, it can push the switching plate so that the switching plate switches the driving mechanism from the first output position to the second output position through the hinged rod. The reset assembly is used to reset the switching plate when the switching plate is pushed again, and the switching plate switches the driving mechanism back to the first output position.

[0010] Furthermore, the spraying mechanism includes a reciprocating screw, a reciprocating slider and a nozzle. The reciprocating screw is rotatably set on the support mechanism. One end of the reciprocating slider is fixedly connected to the nozzle, and the other end of the reciprocating slider is set on the reciprocating screw. When the reciprocating screw rotates, the reciprocating slider can move along the axis of the reciprocating screw. The grooved wheel mechanism and the reciprocating screw are connected through a transmission assembly.

[0011] Furthermore, the transmission assembly includes a first pulley, a second pulley and a transmission belt. The grooved pulley mechanism can drive the first pulley to rotate, and the second pulley can drive the reciprocating screw to rotate. The first pulley and the second pulley are connected by the transmission belt.

[0012] Furthermore, the driving mechanism includes a housing, a driving motor, an output shaft, a first bevel gear assembly and a second bevel gear assembly. The output shaft can simultaneously drive the first bevel gear assembly and the second bevel gear assembly. The first bevel gear assembly includes a first output wheel, and the second bevel gear assembly includes a second output wheel. The rotation directions of the first output wheel and the second output gear are opposite. When the driving mechanism is in the first output position, the first output wheel drives the walking mechanism. When the driving mechanism is in the second output position, the second output wheel drives the walking mechanism.

[0013] Furthermore, the walking mechanism includes a driving wheel assembly, which includes a driving wheel and a transmission wheel. When in the first output position, the first output wheel can drive the transmission wheel to roll. When in the second output position, the second output wheel can drive the transmission wheel to roll. The rolling of the transmission wheel can drive the driving wheel to roll on the surface of the plate.

[0014] Furthermore, the first output wheel and the transmission wheel, as well as the second output wheel and the transmission wheel, are driven by friction.

[0015] Furthermore, the support mechanism includes a mounting frame and a spring compensation assembly, the spraying mechanism is arranged on the mounting frame, the spring compensation assembly includes a sleeve, a compensation spring and a support rod, the compensation spring is installed in the sleeve, one end of the sleeve is fixed on the mounting frame, the first end of the support rod extends into the sleeve and is fixedly connected to the compensation spring, and the support rod can compress the compensation spring during the guided sliding process in the sleeve.

[0016] The beneficial effects of the present invention are: when in use, the driving mechanism drives the walking mechanism to walk on the surface of the plate, the walking mechanism drives the supporting mechanism to move synchronously, and the spraying mechanism is started, and then the spraying mechanism on the supporting mechanism can spray polyurethane onto the surface of the plate during the movement. When the walking mechanism completes a stroke, the linkage mechanism will change the spraying position of the spraying mechanism on the supporting mechanism once, and make the walking mechanism move in the opposite direction for the next stroke. This reciprocating process can make the polyurethane sprayed by the spraying mechanism completely cover the plate, thereby completing the spraying of the plate. There is no need to set up a control system and a control program, and the manufacturing cost is low.

[0017] The technical solution of the polyurethane on-site spraying process for cold storage construction of the present invention is:

[0018] A polyurethane on-site spraying process for cold storage construction uses the above-mentioned polyurethane on-site spraying device for cold storage construction for spraying. A driving mechanism drives a traveling mechanism to travel on the surface of a plate, and the traveling mechanism drives a supporting mechanism to move synchronously. The spraying mechanism sprays polyurethane onto the surface of the plate as the supporting mechanism moves. When the traveling mechanism completes a stroke, the linkage mechanism changes the spraying position of the spraying mechanism on the supporting mechanism and causes the traveling mechanism to move in the reverse direction for the next stroke.

[0019] The beneficial technical effects of the present invention are as follows: during the spraying process of the present invention, by continuously changing the spraying position of the spraying mechanism on the supporting mechanism and making the walking mechanism move in reverse for the next stroke, the polyurethane sprayed by the spraying mechanism can completely cover the plate, thereby completing the spraying of the plate. There is no need to set up a control system and a control program, and the automatic spraying of the plate can be achieved, and the spraying cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an embodiment of a polyurethane on-site spraying device for cold storage construction according to the present invention;

[0021] Figure 2 for Figure 1 A local enlarged view of point A;

[0022] Figure 3 for Figure 1 Schematic diagram of the internal structure at B in FIG;

[0023] Figure 4 for Figure 3 A top view of the structure;

[0024] Figure 5 for Figure 3 The main view of the structure;

[0025] Figure 6 for Figure 3 Schematic diagram after some structures are hidden;

[0026] Figure 7 for Figure 3 Schematic diagram of the structure of the driving mechanism;

[0027] Figure 8 for Figure 3 Schematic diagram of the switch board and reset component in FIG;

[0028] Figure 9 for Figure 8 Schematic diagram of the internal structure of the reset component;

[0029] Figure 10 for Figure 8 A schematic diagram of the internal structure of the reset component in another state;

[0030] Figure 11 for Figure 1 A local enlarged view of point C in FIG;

[0031] Figure 12 for Figure 1 Schematic diagram of the internal structure of the spring compensation component.

[0032] in:

[0033] 100, base; 110, fixed bottom plate; 120, guide rail;

[0034] 210, guide block; 212, support plate; 214, T-block; 220, mounting frame;

[0035] 232, sleeve; 234, compensation spring; 236, support rod;

[0036] 242, first compensation component; 244, second compensation component; 246, third compensation component;

[0037] 300, spraying mechanism; 310, reciprocating screw; 320, reciprocating slider; 332, mounting block; 334, spray head;

[0038] 410, frame; 412, rotating shaft; 414, linkage motor;

[0039] 422, active dial; 423, lever; 424, cylindrical pin; 425, axle; 427, grooved wheel; 428, toggle slot;

[0040] 431, switch push rod; 433, switch plate; 435, hinged rod;

[0041] 440, reset assembly; 441, reset compression spring; 443, push rod; 445, guide block; 446, locking sleeve; 447, one-way tooth; 448, first track; 449, second track;

[0042] 462, transmission belt; 463, first pulley; 464, second pulley; 466, belt shaft; 468, universal joint;

[0043] 510, housing; 512, drive motor; 514, output shaft;

[0044] 521, first mounting shaft; 522, first axial bevel gear; 524, first radial bevel gear; 526, first output gear;

[0045] 531, second mounting shaft; 532, second axial bevel gear; 534, second radial bevel gear; 536, second output gear;

[0046] 612, driving shaft; 614, transmission wheel; 616, driving wheel; 618, first driven wheel;

[0047] 700. Board. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0050] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0051] The following describes the polyurethane on-site spraying device for cold storage construction of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0052] like Figures 1 to 12 As shown, the polyurethane on-site spraying device for cold storage construction in this embodiment includes a base 100, a supporting mechanism, a traveling mechanism, a driving mechanism and a linkage mechanism. The supporting mechanism can slide along the guide of the base 100, and a spraying mechanism 300 is provided on the supporting mechanism. The spraying mechanism 300 is used to spray polyurethane onto the plate 700. The traveling mechanism can move along the surface of the plate 700 and drive the supporting mechanism to move synchronously. The driving mechanism can drive the traveling mechanism to move back and forth on the surface of the plate 700. The linkage mechanism is used to change the position of the spraying mechanism 300 on the supporting mechanism. Every time the traveling mechanism travels a stroke, the linkage mechanism can change the spraying position of the spraying mechanism 300 once and enable the traveling mechanism to travel in reverse for the next stroke.

[0053] During use, the driving mechanism drives the walking mechanism to move on the surface of the plate 700, and the walking mechanism drives the supporting mechanism to move synchronously, starts the spraying mechanism 300, and then the spraying mechanism 300 on the supporting mechanism can spray polyurethane onto the surface of the plate 700 during the movement. When the walking mechanism completes a stroke, the linkage mechanism will change the spraying position of the spraying mechanism 300 on the supporting mechanism once, and make the walking mechanism move in reverse for the next stroke. This reciprocating process can make the polyurethane sprayed by the spraying mechanism 300 completely cover the plate 700, thereby completing the spraying of the plate 700. There is no need to set up a control system and a control program, and the manufacturing cost is low.

[0054] In one embodiment, the base 100 includes a fixed base plate 110 and two guide rails 120 disposed on either side of the fixed base plate 110. The support mechanism includes two guide blocks 210 and two support rods 236 fixedly connected to the guide blocks 210. The guide rails 120 are provided with T-slots. The guide blocks 210 include support plates 212 and T-blocks 214 adapted to fit within the T-slots. The guide blocks 210 are capable of sliding along the corresponding guide rails 120. The support mechanism also includes a mounting frame 220 connected to the two support rods 236. The spraying mechanism 300 is disposed on the mounting frame 220. In other embodiments, the guide blocks 210 may be replaced with rollers that roll on the guide rails 120, thereby reducing resistance to the support mechanism as it moves on the base 100.

[0055] In one embodiment, the linkage mechanism includes a frame 410 and a rotating shaft 412, a groove pulley mechanism and a switching assembly arranged in the frame 410. The frame 410 and the mounting frame 220 are fixedly connected. The rotating shaft 412 is rotatably mounted on the frame 410 through a bearing. The linkage mechanism also includes a linkage motor 414, which is also fixed on the frame 410. The linkage motor 414 is fixedly connected to the rotating shaft 412 and can drive the rotating shaft 412 to rotate.

[0056] The sheave mechanism includes an active dial 422, a sheave 427 and an axle 425. The active dial 422 is fixed on the rotating shaft 412, and the sheave 427 is fixed on the axle 425. The active dial 422 includes an arc plate with a notch and a lever 423 fixed on the back of the arc plate and a cylindrical pin 424 fixed on the lever 423. The axle 425 is also rotatably mounted on the frame 410 through a bearing. The axle 425 and the rotating shaft 412 are parallel and spaced apart. The sheave 427 has four mutually perpendicular toggling grooves 428. The axle 425 is transmission-connected to the spraying mechanism 300.

[0057] When the driving mechanism moves, the linkage motor 414 also drives the rotating shaft 412 to rotate. The rotating shaft 412 drives the switching component to move and also drives the active dial 422 to rotate. During this process, before the cylindrical pin 424 of the active dial 422 contacts the groove wheel 427, the groove wheel 427 is stationary. At this time, although the switching component moves, it will not cause the walking mechanism to switch the walking direction.

[0058] When the travel mechanism is about to end its current stroke, the switching assembly starts to switch the travel direction of the travel mechanism. At the same time, the cylindrical pin 424 enters one of the toggle slots 428, and the active dial 422 drives the groove wheel 427 to rotate, thereby rotating the axle 425. The rotation of the axle 425 can cause the spray mechanism 300 to change the spraying position. When the travel mechanism's travel direction is switched, the cylindrical pin 424 disengages the toggle slot 428, and the spray mechanism 300 completes the change in spraying position. As the driving mechanism continues to move, the spray mechanism 300 continues to spray the plate 700 in the opposite direction of the previous stroke.

[0059] The grooved wheel mechanism can be used to convert the continuous rotation of the rotating shaft 412 into a periodic rotation with pauses of the wheel shaft 425, so that the spraying mechanism 300 can change its position with pauses. During the pause period, the walking mechanism can drive the spraying mechanism 300 to stably spray polyurethane along the set path. Combined with the switching component, the polyurethane sprayed by the spraying mechanism 300 can completely cover the plate 700, thereby realizing automatic spraying.

[0060] In one embodiment, the switching assembly includes a switching push rod 431, a switching plate 433, a hinged rod 435, and a reset assembly 440. The switching push rod 431 is fixed to the rotating shaft 412 and includes a circular plate fixed to the rotating shaft 412 and a toggle rod fixed to the circular plate. In other embodiments, the switching push rod 431 may be a long rod directly fixed to the rotating shaft 412. The switching plate 433 is hinged to the frame 410 and has an inclined section and a vertical section. The toggle rod can push the vertical section to cause the switching plate 433 to swing. To ensure that the toggle rod can more smoothly push the switching plate 433, a guiding arc surface is provided on each vertical section. The first end of the hinged rod 435 is hinged to the switch plate 433, and the second end of the hinged rod 435 is hinged to the drive mechanism. The reset assembly 440 is used to reset the switch plate 433. The drive mechanism has a first output position and a second output position. In the first output position, the drive mechanism advances the travel mechanism, and in the second output position, the drive mechanism retreats the travel mechanism. Before the toggle lever of the switch push rod 431 contacts the switch plate 433, the drive mechanism is in the first output position. After the rotation shaft 412 rotates a set angle and the switch push rod 431 also rotates to the set position, the toggle lever pushes the switch plate 433, causing the switch plate 433 to swing and drive the hinged rod 435 to move, thereby switching the drive mechanism from the first output position to the second output position.

[0061] It should be noted that the above-mentioned set angle and the time required to rotate the set angle need to be determined based on the time required for the walking mechanism to complete a single stroke. It can be understood that it is necessary to ensure that before the walking mechanism is about to end this stroke, there is no need to reverse the walking mechanism and there is no need to switch the spraying position of the spraying mechanism 300, that is, during this stage, the switching push rod 431 will not push the switching plate 433, and the groove wheel 427 will not rotate.

[0062] In this embodiment, the reset assembly 440 includes a reset compression spring 441, a push rod 443 and a locking sleeve 446. The locking sleeve 446 is arranged on the frame 410 and can rotate along its own axis. A plurality of switching tracks and one-way teeth 447 are circumferentially arranged on the inner wall surface of the locking sleeve 446. The one-way teeth 447 have guiding slopes, and two one-way teeth 447 are arranged between two adjacent switching tracks. The first end of the push rod 443 is hinged to the vertical section through the hinge rod 435. The reset compression spring 441 is arranged in the inner cavity of the locking sleeve 446. The second end of the push rod 443 presses on the reset compression spring 441. A plurality of guide long blocks 445 are circumferentially spaced on the outer circumference of the push rod 443. The end of the guide long block 445 is also provided with a guiding slope. Under the push of the reset compression spring 441, the guide long block 445 can extend into the switching track.

[0063] by Figure 8 and Figure 9For the purpose of explanation (for the convenience of explanation, the locking sleeve 446 is omitted, and the switching track and the one-way tooth 447 are replaced by dotted lines), three adjacent switching tracks are selected and named as the first track 448 and the second track 449 respectively. When in use, when the driving mechanism is in the first output position, under the push of the return spring, one of the guide long blocks 445 extends into the first track 448 (as shown in FIG. Figure 8 When the toggle lever pushes the switch plate 433, the drive mechanism switches from the first output position to the second output position. At the same time, the vertical section of the switch plate 433 causes the push rod 443 to retract into the locking sleeve 446, the return spring is compressed, and the guide long block 445 gradually escapes from the first track 448 until the tip of the guide slope of the guide long block 445 contacts or is offset from the tip of the guide slope of the guide tooth. At this time, the toggle lever and the switch plate 433 are separated, and the push rod 443 is retracted into the locking sleeve 446. 3 is no longer pushed by the switching plate 433. Under the thrust of the return spring, the guide long block 445 returns. When the tip of the guide slope of the guide long block 445 contacts the tip of the guide slope of the one-way tooth 447, at this critical position, combined with the thrust of the return spring, the guide slope of the guide long block 445 contacts the guide slope of the guide tooth. Under the cooperation of the two guide slopes, the locking sleeve 446 rotates to a set angle, and the guide long block 445 enters and is restricted in the tooth groove of the one-way tooth 447 (as shown in FIG. Figure 9 The drive mechanism is locked in the second output position.

[0064] When the toggle lever pushes the switching plate 433 again, the driving mechanism switches from the second output position back to the first output position, and the vertical section of the switching plate 433 retracts the pressing rod 443 into the locking sleeve 446 again, the return spring is compressed, and the guide long block 445 gradually disengages from the tooth groove until the tip of the guiding inclined surface of the guide long block 445 contacts or is offset from the tip of the guiding inclined surface of the one-way tooth 447. At this time, the toggle lever and the switching plate 433 are separated, and under the thrust of the return spring, the guide long block 445 returns. When the tip of the guiding inclined surface of the guide long block 445 contacts the tip of the guiding inclined surface of the guide tooth, at this critical position, combined with the thrust of the return spring, the guiding inclined surface of the guide long block 445 contacts the guiding inclined surface of the other one-way tooth 447. Under the cooperation of the two guiding inclined surfaces, the locking sleeve 446 rotates to a set angle, and the guide long block 445 enters and is restricted in the second track 449, thereby locking the driving mechanism in the first output position.

[0065] In one embodiment, the spraying mechanism 300 includes a reciprocating screw 310, a reciprocating slider 320, and a spray head. The outer circumference of the reciprocating screw 310 has two thread grooves with the same pitch and opposite rotation directions. The reciprocating screw 310 is rotatably mounted on the mounting bracket 220 of the support mechanism. The sheave mechanism and the reciprocating screw 310 are connected by a transmission assembly. The rotation of the wheel shaft 425 can drive the transmission assembly to move, and the transmission assembly can then drive the reciprocating screw 310 to rotate. One end of the reciprocating slider 320 is fixedly connected to the spray head, and the other end of the reciprocating slider 320 is disposed in the thread groove. When the reciprocating screw 310 rotates, the reciprocating slider 320 can move along the axis of the reciprocating screw 310, thereby enabling the spray head to move along the axis of the reciprocating screw 310. Because the wheel shaft 425 outputs a periodic rotation with pauses, the spray head also has a periodic movement with pauses.

[0066] The nozzle includes a mounting block 332 and a nozzle 334. The mounting block 332 is an L-shaped block. One end of the reciprocating slider 320 is fixedly connected to the vertical section of the mounting block 332. The horizontal section of the mounting block 332 is provided with a guide slot. The mounting frame 220 has an L-shaped bent plate section. The vertical section of the bent plate section is guided and connected with the guide slot, so that the mounting block 332 can slide along the guide of the mounting frame 220, thereby making the movement of the nozzle smoother.

[0067] In one embodiment, the transmission assembly includes a first pulley 463, a second pulley 464 and a transmission belt 462. The first pulley 463 is fixed on the wheel shaft 425. When the wheel shaft 425 rotates, it can drive the first pulley 463 to rotate. A belt shaft 466 is rotatably installed on one of the support rods 236 through a bearing. The second pulley 464 is fixed on the belt shaft 466. The first pulley 463 and the second pulley 464 are connected through a transmission belt. The second pulley 464 can drive the reciprocating screw rod 310 to rotate. When the second pulley 464 rotates, it can drive the belt shaft 466 to rotate. The belt shaft 466 drives the reciprocating screw rod 310 to rotate synchronously. Specifically, the belt shaft 466 and the first end of the reciprocating screw 310 are connected by a universal joint 468, and the second end of the reciprocating screw 310 is rotatably mounted on the mounting bracket 220. The mounting bracket 220 and the support rod 236 are hingedly connected. This arrangement allows for easy adjustment of the inclination angle of the reciprocating screw 310 as needed, thereby facilitating the spraying of plates 700 of different shapes. In other embodiments, the first end of the reciprocating screw 310 is fixedly connected to the belt shaft 466, which can simplify the structure.

[0068] In one embodiment, the drive mechanism includes a housing 510, a drive motor 512, an output shaft 514, a first bevel gear assembly, and a second bevel gear assembly. Specifically, the frame 410 is provided with two guide slots extending horizontally, spaced apart in the vertical direction. The guide slots are T-shaped slots. The housing 510 is a box-shaped structure with an inner cavity. Two T-shaped sliders are provided on one outer wall of the housing 510, which are adapted to the T-shaped slots. The T-shaped sliders and the guide slots cooperate to enable the housing 510 to slide in a horizontal direction. The housing 510 includes a bottom plate extending toward the hinge rod 435. The bottom plate is provided with a slide slot. The second end of the hinge rod 435 is hinged in the slide slot. When the switch plate 433 is pushed, the second end of the hinge rod 435 can slide in the slide slot.

[0069] The driving motor 512 is fixed in the inner cavity of the housing 510, and the output shaft 514 is fixedly connected to the motor shaft of the driving motor 512. The first bevel gear assembly includes a first mounting shaft 521 and a first axial bevel gear 522 and a first radial bevel gear 524 that mesh with each other. The second bevel gear assembly includes a second mounting shaft 531 and a second axial bevel gear 532 and a second radial bevel gear 534 that mesh with each other. The first axial bevel gear 522 and the second axial bevel gear 532 are fixed on the output shaft 514, and the two are arranged in back to back. The first radial bevel gear 524 and the second radial bevel gear 534 are respectively connected to the first bevel gear 521 and the second radial bevel gear 524. A mounting shaft 521 and a second mounting shaft 531 are rotatably arranged in the housing 510. The first mounting shaft 521 and the second mounting shaft 531 pass through the housing 510 and extend outside the housing 510. The first bevel gear assembly also includes a first output wheel 526 fixed to the extended end of the first mounting shaft 521. The second bevel gear assembly also includes a second output wheel 536 fixed to the extended section of the second mounting shaft 531. Since the first axial bevel gear 522 and the second axial bevel gear 532 are arranged back to back, when the output shaft 514 rotates, the rotation directions of the first output wheel 526 and the second output wheel 536 are opposite.

[0070] During use, when the drive mechanism is in the first output position, the first output wheel 526 contacts the traveling mechanism to drive the traveling mechanism. When the articulated rod 435 switches the drive mechanism from the first output position to the second output position, the first output wheel 526 separates from the traveling mechanism, and the second output wheel 536 contacts the traveling mechanism to drive the traveling mechanism in the opposite direction. This arrangement allows for outputting rotational motion in opposite directions at different times without requiring a controller or control program to switch the direction of the drive motor 512, thereby further reducing reliance on automated control systems and lowering manufacturing costs.

[0071] In one embodiment, the traveling mechanism includes a driving wheel 616 assembly, which includes a driving shaft 612, a driving wheel 616 fixed to the driving shaft 612, and a transmission wheel 614. The driving shaft 612 is rotatably mounted on the frame 410 via a bearing, and the driving wheel 616 and the transmission wheel 614 are both fixed to the driving shaft 612. When in the first output position, the first output wheel 526 can drive the transmission wheel 614 to rotate. When in the second output position, the second output wheel 536 can drive the transmission wheel 614 to rotate. The rotation of the transmission wheel 614 can drive the driving wheel 616 to roll on the surface of the plate 700. The walking wheel assembly also includes a first driven wheel 618, a second driven wheel and a third driven wheel, wherein the first driven wheel 618 and the driving wheel 616 are located on the same side, and the second driven wheel and the third driven wheel are located on the other side. When in use, the driving wheel 616 and the first driven wheel 618 clamp one side of the plate 700, and the second driven wheel and the third driven wheel clamp the other side of the plate 700, so that when the driving wheel 616 moves, the driving wheel 616 is not likely to slip with the plate 700, making the walking process more stable.

[0072] In one embodiment, friction transmission is used between the first output wheel 526 and the transmission wheel 614, and between the second output wheel 536 and the transmission wheel 614. This transmission method has the advantage that when the drive mechanism switches between the two output positions, transmission can be achieved by simply ensuring that the transmission wheel 614 is in contact with the first output wheel 526 or the second output wheel 536, resulting in a smoother and faster switching process. In other embodiments, a gear transmission may be used, where the first output wheel 526, the second output wheel 536, and the transmission wheel 614 are all gears. This transmission method is more stable, but during the switching process of the drive mechanism's output position, the transmission wheel 614 may temporarily become stuck due to inaccurate meshing with the first output wheel 526 or the second output wheel 536. However, since the first output wheel 526 or the second output wheel 536 can rotate, the stuck time is short, minimizing the impact on normal operation.

[0073] In one embodiment, the support mechanism includes a spring compensation assembly, which includes a sleeve 232, a compensation spring 234, and a support rod 236. The compensation spring 234 is mounted in the sleeve 232. The first end of the support rod 236 extends into the sleeve 232 and is fixedly connected to the compensation spring 234. The support rod 236 can compress the compensation spring 234 during the process of sliding in the sleeve 232. In this embodiment, the support mechanism is provided with three spring compensation assemblies, namely a first compensation assembly 242, a second compensation assembly 244, and a third compensation assembly 246. The first compensation assembly 242 and the second compensation assembly 244 constitute the two support rods 236 mentioned above. The second ends of the support rods 236 of the first compensation assembly 242 and the second compensation assembly 244 are fixedly connected to the support plate 212 of the guide block 210. One end of the sleeves 232 of the first compensation assembly 242 and the second compensation assembly 244 are both connected to the mounting bracket 220. One end of the sleeve 232 of the third compensation component 246 is also fixedly connected to the mounting bracket 220. The lower end of the support rod 236 of the third compensation component 246 is fixed with a driven wheel mounting rod, and the second driven wheel and the third driven wheel are rotatably mounted on the driven wheel mounting rod.

[0074] During use, when machining a curved plate 700, the height between the plate 700 and the fixed base plate 110 varies at different locations. The compensation springs 234 in the first and second compensation assemblies 242 and 244 are adaptively compressed, thereby ensuring that the driving wheel 616 and the three driven wheels are always in contact with the plate 700. When the reciprocating screw 310 needs to be tilted for spraying, the heights of the second and third driven wheels differ from the height of the first driven wheel 618, and the third compensation assembly 246 can compensate for this height difference.

[0075] The present invention utilizes the aforementioned on-site polyurethane spraying device for cold storage construction. The process involves simultaneously activating the drive mechanism and the spraying mechanism. The drive mechanism drives the traveling mechanism to travel across the surface of the sheet material. During this process, the traveling mechanism drives the support mechanism to move synchronously, allowing the spraying mechanism on the support mechanism to spray polyurethane onto the sheet material surface. When the traveling mechanism completes one stroke, the linkage mechanism shifts the spraying mechanism's spraying position on the support mechanism and reverses the travel mechanism for the next stroke. This process repeats until the polyurethane sprayed by the spraying mechanism completely covers the sheet material. In other embodiments, the spraying mechanism may be activated first, followed by the drive mechanism.

[0076] By continuously changing the spraying position of the spraying mechanism on the supporting mechanism and making the walking mechanism move in the reverse direction for the next stroke, and repeating this process, the polyurethane sprayed by the spraying mechanism can completely cover the plate, thereby completing the spraying of the plate. Without setting up a control system and a control program, automatic spraying of the plate can be achieved, and the spraying cost is low.

[0077] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A polyurethane on-site spraying device for cold storage construction, characterized in that: include: base; The support mechanism is capable of sliding along the guide of the base, and a spraying mechanism is provided on the support mechanism, and the spraying mechanism is used to spray polyurethane onto the plate; The walking mechanism can move along the surface of the plate and drive the supporting mechanism to move synchronously; A driving mechanism capable of driving the traveling mechanism to move back and forth on the surface of the plate; A linkage mechanism, used for changing the spraying position of the spraying mechanism on the supporting mechanism; Each time the walking mechanism travels a stroke, the linkage mechanism can change the spraying position of the spraying mechanism on the supporting mechanism and enable the walking mechanism to travel in the reverse direction for the next stroke; The linkage mechanism includes a frame and a rotating shaft, a groove pulley mechanism and a switching assembly arranged on the frame. The groove pulley mechanism and the spraying mechanism are connected in transmission. The rotating shaft can drive the groove pulley mechanism and the switching assembly to move. The movement of the switching assembly can enable the walking mechanism to switch the walking direction. The groove pulley mechanism enables the spraying mechanism to change the spraying position on the supporting mechanism when the walking mechanism switches the walking direction.

2. The polyurethane on-site spraying device for cold storage construction according to claim 1 is characterized in that: The switching assembly includes a switching push rod, a switching plate, a hinged rod and a reset assembly. The switching push rod is fixed on the rotating shaft, the switching plate is hinged on the frame, the first end of the hinged rod is hinged to the switching plate, and the second end of the hinged rod is hinged to the driving mechanism. The driving mechanism has a first output position and a second output position. When in the first output position, the driving mechanism moves the walking mechanism forward, and when in the second output position, the driving mechanism moves the walking mechanism backward. When the switching push rod is rotated to the set position, it can push the switching plate so that the switching plate switches the driving mechanism from the first output position to the second output position through the hinged rod. The reset assembly is used to reset the switching plate when the switching plate is pushed again, and the switching plate switches the driving mechanism back to the first output position.

3. The polyurethane on-site spraying device for cold storage construction according to claim 1 is characterized in that: The spraying mechanism includes a reciprocating screw, a reciprocating slider and a nozzle. The reciprocating screw is rotatably arranged on the support mechanism. One end of the reciprocating slider is fixedly connected to the nozzle, and the other end of the reciprocating slider is arranged on the reciprocating screw. When the reciprocating screw rotates, the reciprocating slider can move along the axis of the reciprocating screw. The grooved wheel mechanism and the reciprocating screw are connected through a transmission assembly.

4. The polyurethane on-site spraying device for cold storage construction according to claim 3, characterized in that: The transmission assembly includes a first pulley, a second pulley and a transmission belt. The grooved pulley mechanism can drive the first pulley to rotate, and the second pulley can drive the reciprocating screw to rotate. The first pulley and the second pulley are connected by the transmission belt.

5. The polyurethane on-site spraying device for cold storage construction according to claim 2, characterized in that: The driving mechanism includes a housing, a driving motor, an output shaft, a first bevel gear assembly and a second bevel gear assembly. The output shaft can simultaneously drive the first bevel gear assembly and the second bevel gear assembly. The first bevel gear assembly includes a first output wheel, and the second bevel gear assembly includes a second output wheel. The rotation directions of the first output wheel and the second output gear are opposite. When the driving mechanism is in the first output position, the first output wheel drives the walking mechanism. When the driving mechanism is in the second output position, the second output wheel drives the walking mechanism.

6. The polyurethane on-site spraying device for cold storage construction according to claim 5, characterized in that: The walking mechanism includes a driving wheel assembly, which includes a driving wheel and a transmission wheel. When in the first output position, the first output wheel can drive the transmission wheel to roll. When in the second output position, the second output wheel can drive the transmission wheel to roll. The rolling of the transmission wheel can drive the driving wheel to roll on the surface of the plate.

7. The polyurethane on-site spraying device for cold storage construction according to claim 6, characterized in that: The first output wheel and the transmission wheel as well as the second output wheel and the transmission wheel are driven by friction.

8. The polyurethane on-site spraying device for cold storage construction according to claim 1, characterized in that: The support mechanism includes a mounting frame and a spring compensation assembly. The spraying mechanism is arranged on the mounting frame. The spring compensation assembly includes a sleeve, a compensation spring and a support rod. The compensation spring is installed in the sleeve. One end of the sleeve is fixed on the mounting frame. The first end of the support rod extends into the sleeve and is fixedly connected to the compensation spring. The support rod can compress the compensation spring during the guided sliding process in the sleeve.

9. A polyurethane on-site spraying process for cold storage construction, characterized in that: Spraying is performed using the polyurethane on-site spraying device for cold storage construction described in any one of claims 1 to 8, wherein the driving mechanism drives the walking mechanism to move on the surface of the plate, the walking mechanism drives the supporting mechanism to move synchronously, and the spraying mechanism sprays polyurethane onto the surface of the plate during the movement of the supporting mechanism. When the walking mechanism completes a stroke, the linkage mechanism changes the spraying position of the spraying mechanism on the supporting mechanism once, and causes the walking mechanism to move in the reverse direction for the next stroke.

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