An airtight material painting machine and painting method for the seams between the wall panels of a controlled atmosphere fresh-keeping storage

Abstract

The present invention provides an airtight material painting machine for the seams between the wall panels of a controlled atmosphere fresh-keeping storage, which comprises a frame, on which are provided: a traveling mechanism, including a motor and a crawler-type traveling mechanism, the motor is fixed on the frame, a pair of driving wheels and a pair of driven wheels in the crawler-type traveling mechanism are fixed on both sides of the frame, the driving wheels are connected to the motor, two main crawlers are respectively sleeved on the corresponding driving wheels and driven wheels, and permanent magnet blocks are fixed on the outer surfaces of the main crawlers; a feeding mechanism, including a material cylinder, on the frame, a discharge port is arranged at the front end of the material cylinder, a material nozzle is arranged thereon, a piston is arranged in the material cylinder, a pushing plate device is connected thereto, and then it is connected to a feeding driving device; a cloth feeding mechanism, which is a cloth feeding reel, and both ends thereof are arranged on the frame; a rolling mechanism, including a front rolling roller and a rear rolling roller, the front rolling roller is arranged at the front end of the frame, and the material nozzle at the front end of the material cylinder in the feeding mechanism is placed above the front rolling roller. This painting machine replaces manual labor and can complete the painting of the airtight material for the seams with high quality and high efficiency. The present invention also provides a painting method.

Description

Technical Field

[0001] The present invention belongs to the coating field, and relates to a device for brushing airtight materials in the gaps between wall panels, in particular to a coating machine for airtight materials between the seams of the wall panels of a controlled atmosphere fresh-keeping storage; the present invention also provides a method for brushing airtight materials using the coating machine. Background Art

[0002] As the carrier of controlled atmosphere fresh-keeping technology, a controlled atmosphere fresh-keeping storage must meet the characteristics of heat insulation and cold insulation, gas barrier and pressure resistance, heat preservation and moisture resistance, and adjustment of gas components. Therefore, during the construction of a controlled atmosphere fresh-keeping storage, the airtightness of the storage body is crucial. It directly affects the success or failure of the controlled atmosphere fresh-keeping technology. For newly built controlled atmosphere fresh-keeping storages, strict airtight measures need to be implemented for the gaps between wall panels and wall panels, roof panels and roof panels, wall panels and roof panels, wall panels and the ground, wall panels and doors and windows, etc.

[0003] Currently, the sealing method for the seams between panels is usually manual operation. For a controlled atmosphere fresh-keeping storage with a normal height of about 8 meters, the specific operation process is as follows:

[0004] 1. Build a mobile 3-layer scaffolding inside the storage, with one worker standing on each layer and one worker standing on the ground, a total of 4 people on 3 layers operating between the panel seams at the same time;

[0005] 2. Stick masking paper at equal-width positions on both sides of the panel seam;

[0006] 3. Brush a layer of transition airtight glue;

[0007] 4. After the transition airtight glue dries for 24 - 48 hours, brush a layer of airtight glue + paste non-woven fabric + then brush another layer of airtight glue.

[0008] 5. Then, after drying for 12 - 24 hours, perform the second brushing of airtight glue + pasting non-woven fabric + then brushing airtight glue;

[0009] 6. Then remove the masking paper;

[0010] 7. Two workers on the ground are required to not only brush the airtight glue + paste non-woven fabric from the ground to about 2 meters, but also supply materials for the upper workers and manually push the scaffolding to the next working position.

[0011] In the prior art, for the process of treating the airtightness of the seams of the storage body of a controlled atmosphere fresh-keeping storage, there are defects of low manual coating efficiency and high cost. For manual brushing, the coating thickness is uneven. At the same time, for manual brushing, it is necessary to stand at a high place, which poses a risk of high-altitude operation. Summary of the Invention

[0012] The object of the present invention is to improve the deficiencies of the prior art and provide a device for applying airtight materials, which can replace manual labor and complete the application of airtight materials for board seams with high quality and high efficiency.

[0013] Another object of the present invention is to provide a method for applying airtight materials using the above device.

[0014] The object of the present invention is achieved as follows:

[0015] An airtight material coater for the seams between the wall panels of a controlled atmosphere fresh-keeping storage includes a frame. The mechanisms provided on the frame include a traveling mechanism, a feeding mechanism, a cloth feeding mechanism, and a rolling mechanism;

[0016] The traveling mechanism includes a main crawler traveling mechanism, which includes two sets of main crawler devices and a motor. The motor is fixed on the frame. Each set of the main crawler devices includes a driving wheel, a driven wheel, and a main crawler that are connected to each other. The driving wheel is connected to the motor. The driven wheel is fixed on the frame through a bearing. The main crawler is respectively sleeved and fixed on the driving wheel and the driven wheel. The two main crawlers in the two sets of main crawler devices are respectively located on both sides of the frame. A number of permanent magnet blocks are fixed on the outer surface of the crawler of the main crawler;

[0017] The feeding mechanism includes a material cylinder fixed on the frame. The front end of the material cylinder is provided with a discharge port, and a nozzle is provided on the discharge port. An extrusion piston and a push plate device are provided in the material cylinder. The extrusion piston divides the material cylinder into two mutually isolated spaces in the front and back. The front side of the extrusion piston facing forward faces the discharge port. The push plate device is located behind the extrusion piston. The push plate device includes a push plate and a transmission mechanism. The push plate is connected to the extrusion piston, and the push plate is connected to the transmission mechanism. The transmission mechanism passes through the rear end cover of the material cylinder and is connected to a feeding driving device, so that the push plate device drives the extrusion piston to move in the material cylinder, causing the airtight material or glue in the material cylinder to be extruded from the nozzle;

[0018] The cloth feeding mechanism includes a cloth feeding reel, the two ends of which are rotatably fixed on the frame. The middle of the cloth feeding reel is a cloth winding shaft section, and cloth shaft stoppers are fixed at both ends of the cloth winding shaft section;

[0019] The rolling mechanism includes a front rolling roller and a rear rolling roller. The front rolling roller is rotatably arranged at the front end of the frame, and the side surface of the rolling roller protrudes outside the front edge of the frame. The nozzle at the front end of the material cylinder in the feeding mechanism is placed above the front rolling roller, so that the airtight material or glue coming out of the nozzle falls on the cloth material placed on the front rolling roller; the rear rolling roller is rotatably arranged on the frame and is located behind the front rolling roller.

[0020] Specifically, the frame includes a flat plate, and two opposite vertical plates are respectively connected downward at two side edges of the flat plate. Mounting holes (or called bearing seats) are provided on the vertical plates. By installing bearings in the mounting holes, the axle shafts of the driving wheels and the driven wheels in the main crawler running mechanism of the running mechanism, the cloth feeding reel of the cloth feeding mechanism, and the roller shafts of the front roller and the rear roller of the rolling mechanism are all installed on the vertical plates.

[0021] Further, the crawler running mechanism in the running mechanism further includes a secondary crawler running mechanism, which includes two sets of secondary crawler devices. Each set of the secondary crawler devices includes a secondary driving wheel, a secondary driven wheel, and a secondary crawler. The secondary driving wheel rotates coaxially and synchronously with the driven wheel in the main crawler running mechanism. The secondary driven wheel rotates coaxially and synchronously with the rear roller in the rolling mechanism. The secondary crawler is fixed on the secondary driving wheel and the secondary driven wheel. Two such secondary crawlers are located inside two main crawlers. A number of permanent magnet blocks are also provided on the outer surface of the track of the secondary crawler; the secondary crawler is arranged parallel to the main crawler.

[0022] Preferably, there are two motors that operate synchronously in the running mechanism, which are arranged on the frame. The output shafts of the two motors are respectively connected to two driving wheels in two sets of the main crawler devices.

[0023] If one motor is set, compared with the transmission of two motors, the weight of a single motor assembly is greater than the total weight of two motors. At the same time, due to its larger volume, the center of gravity is relatively high; for the painting machine crawling on the vertical wall, the higher center of gravity increases the overturning moment.

[0024] In order to facilitate the adjustment of the matching relationship between the running speed of the painting machine and the glue output speed of the material cylinder and ensure the brushing quality, the motor is preferably a speed-regulating motor.

[0025] Preferably, the material of the permanent magnet blocks provided on the outer surface of the crawler is at least one of N48-N52.

[0026] Preferably, the magnet block is cylindrical, with an outer diameter of 5-15 mm and a thickness of 2.5-5 mm. A bolt hole is provided on the axis of the cylindrical magnet block, and a counterbore is provided on the end face facing outward, so that the magnet block is fixed on the crawler by bolts.

[0027] Preferably, the distance between adjacent magnet blocks is: in the length direction of the crawler, the center distance between the front and rear adjacent magnet blocks is 12-18 mm; in the width direction of the crawler, the center distance between the left and right adjacent magnet blocks is 11-17 mm.

[0028] The bolts for fixing the magnet blocks are preferably M3*6 mm bolts. The same specification of magnet blocks can be selected for the main crawler and the secondary crawler, and the distance between the magnet blocks can also be the same.

[0029] Preferably, the auxiliary crawler is arranged parallel to the main crawler.

[0030] When an auxiliary crawler traveling mechanism is provided, the main crawler and the auxiliary crawler in the traveling mechanism are respectively disposed outside and inside of the vertical plate connected to the flat plate in the frame.

[0031] In the feeding mechanism, the connection structure between the extrusion piston and the push plate device in the cartridge is in a form of planar contact, that is, the rear surface of the extrusion piston is in surface contact with the front surface of the push plate.

[0032] In this way, when the feeding drive device acts forward, that is, during the process of extruding the glue, the front surface of the push plate pushes the rear surface of the extrusion piston, causing the extrusion piston to move; when the feeding drive device acts in reverse, the push plate retracts, but the extrusion piston remains stationary. Such a structure enables the push plate device to be easily separated from the cartridge and the extrusion piston, facilitating the replacement and cleaning of the extrusion piston and the cartridge.

[0033] Preferably, an inner recessed space is provided at the rear of the extrusion piston, and the push plate extends into the inner recessed space of the extrusion piston and abuts against the bottom surface of the inner recessed space, so that the push plate and the transmission mechanism thereon are axially positioned.

[0034] Preferably, the outer diameter of the push plate is 8 - 11 mm smaller than the outer diameter of the extrusion piston.

[0035] In the feeding mechanism, an airtight material or glue in the cartridge needs to be extruded through a drive device. There are various choices for the drive device. For example, a pneumatic device can be selected. However, according to the usage characteristics of this painting machine, an electric device is preferred.

[0036] The feeding drive device includes a feeding motor disposed on the frame. The transmission mechanism connected to the push plate is a linear transmission mechanism, which connects the feeding drive device.

[0037] There are also many choices for this linear transmission mechanism, which can be an electric push rod mechanism, a linear motor mechanism, a gear - rack structure, etc. A preferred solution is that in the feeding mechanism, the linear transmission mechanism is a screw mechanism. The specific structure is as follows:

[0038] The rear end cover of the cartridge serves as a cartridge bearing seat. The screw mechanism includes a lead screw and a nut meshing with the lead screw. The nut is fixed on the cartridge bearing seat. One end of the lead screw is connected to the push plate, and the other end passes through the cartridge bearing seat and meshes with the nut on the cartridge bearing seat. The nut rotates by connecting with the feeding motor, and an anti - rotation structure is provided between the lead screw and the cartridge bearing seat.

[0039] The motor drives the nut to rotate, and the nut drives the lead screw to move linearly, driving the extrusion piston to move.

[0040] Furthermore, in the feeding device, the connection structure between the feeding motor and the nut is that a synchronous belt mechanism is provided therebetween. The main synchronous belt pulley is fixed on the output shaft of the feeding motor, and the driven synchronous belt pulley and the nut form an integral component. The feeding motor drives the nut to rotate in the barrel bearing seat through the synchronous belt sleeved on the main synchronous belt pulley and the driven synchronous belt pulley, so that the lead screw drives the extrusion piston to act under the combined action of the anti-rotation structure and the meshing of the nut, and moves linearly in the barrel to extrude the airtight material or glue.

[0041] Preferably, the feeding motor in the feeding drive device is a speed-regulating motor.

[0042] In the feeding mechanism, the connection structure between the barrel and the nozzle is preferably: the nozzle is sealingly sleeved on the discharge port of the barrel, and the nozzle is pressed on the discharge port of the barrel through a pressure sealing device.

[0043] In order to facilitate the pouring of glue into the barrel, the connection structure between the nozzle and the barrel body is a quick-disconnectable connection structure. During operation, the glue is extruded from the opening of the nozzle under a relatively large pressure, and a firm connection and high sealing performance are required between the nozzle and the barrel body. Therefore, the quick-disconnectable connection structure between the nozzle and the barrel body is preferably:

[0044] The pressure sealing device includes a nozzle pressing ring provided on the nozzle, and also includes a nut member and a pull rod. The nozzle pressing ring seals and presses the nozzle on the discharge port of the barrel. At least two bolt holes are evenly distributed on the outer edge of the nozzle pressing ring, and corresponding bolt holes are also provided on the rear end cover of the barrel. Both ends of the pull rod pass through the bolt holes on the rear end cover and the nozzle pressing ring respectively, and are connected and adjusted by two nut members to adjust the pressing force of the nozzle pressing ring.

[0045] In the feeding mechanism, the opening of the nozzle faces downward corresponding to the front roller, and the opening of the nozzle is in a slit shape.

[0046] Preferably, the width of the opening is 3 - 10 mm, and the length is 70 - 80 mm.

[0047] Furthermore, it is advisable that the middle of the slit of the opening is wider and the two sides are narrower.

[0048] The width in the middle of the opening is 5 - 8 mm, and the width of the two sides is 3 - 5 mm.

[0049] The length of the wider slit section in the middle is preferably 21 - 25 mm.

[0050] In the fabric feeding mechanism, preferably, the fabric feeding reel in the fabric feeding mechanism is arranged on the machine frame between the front roller and the rear roller.

[0051] Further, the fabric feeding mechanism further includes a pressing fabric spring piece, one end of which is fixed on the machine frame, and the other end corresponds to the fabric winding shaft section, so that the fabric unrolled by the fabric feeding reel during use is flat without accumulation and will not be slack and disorderly.

[0052] Preferably, the end of the pressing fabric spring piece in the fabric feeding mechanism fixed to the machine frame is fixed below the flat plate in the machine frame.

[0053] Preferably, the fabric feeding reel is a hollow shaft, and a reel center pin is arranged at each end thereof. One end of each reel center pin abuts against one end of the hollow shaft, and the other end is sleeved and fixed in a center pin seat in an axially movable manner. The center pin seat is fixed at the position of the fabric feeding reel hole on the vertical plate of the machine frame. A clamping groove is arranged on the reel center pin protruding out of the fabric feeding reel hole on the outside of the vertical plate, and a shaft retaining ring is arranged in the clamping groove as the axial limit of the fabric winding center pin. A spring is sleeved on the reel center pin, one end of the spring abuts against a flange on the reel center pin, and the other end abuts against the built-in stepped hole of the center pin seat on the inner side surface of the vertical plate.

[0054] With the above structure, the fabric feeding reel can be quickly disassembled and assembled during use.

[0055] In the roller pressing mechanism, preferably, the front roller is coaxially installed with the driven wheel in the main crawler traveling mechanism of the traveling mechanism.

[0056] Specifically, the front roller is arranged on a hollow shaft, and a front roller center shaft abuts against each end of the hollow shaft. The other end of each front roller center shaft sequentially passes through a roller center pin sleeve, the installation hole position of the vertical plate of the machine frame, and the center hole of the driven wheel and is limited by a shaft retaining ring. A spring is penetrated on the front roller center shaft, one end of the spring abuts against the convex shoulder of the center hole of the roller center pin sleeve, and the other end abuts against the side surface of the flange on the front roller center shaft, forming a quick disassembly structure; the roller center pin sleeve and the driven wheel are arranged on the vertical plate through a bearing device arranged at the installation hole position on the vertical plate.

[0057] The rear roller is also arranged on a hollow shaft, and a rear roller center shaft abuts against each end of the hollow shaft. The other end of each rear roller center shaft sequentially passes through a roller center pin sleeve, the installation hole position of the vertical plate of the machine frame, and a shaft blocking member and is limited by a shaft retaining ring. A spring is penetrated on the rear roller center shaft, one end of the spring abuts against the convex shoulder of the center hole of the roller center pin sleeve, and the other end abuts against the side surface of the flange on the rear roller center shaft, forming a quick disassembly structure; the roller center pin sleeve and the rear roller center shaft are arranged on the vertical plate through a bearing device arranged at the installation hole position on the vertical plate.

[0058] In this way, the front rolling roller can rotate actively, which has a better effect on sticking the fabric to the wall surface and on squeezing and filling the glue on the fabric into the plate seams.

[0059] Preferably, in the rolling mechanism, the rear rolling roller is located in the middle of the painting machine.

[0060] This is the structure without setting the auxiliary crawler traveling mechanism.

[0061] Furthermore, when there is an auxiliary crawler traveling mechanism, the front rolling roller is coaxially installed with the driven wheel in the main crawler traveling mechanism of the traveling mechanism and the auxiliary driving wheel in the auxiliary crawler traveling mechanism; the rear rolling roller is coaxial with the auxiliary driven wheel in the auxiliary crawler traveling mechanism, so that the rotation of the rear rolling roller is also an active rotation, and the effect of rolling the fabric is better.

[0062] Specifically, the front rolling roller is arranged on a hollow shaft, and one end of a front rolling roller top shaft is respectively abutted against both ends of the hollow shaft. The other end of each front rolling roller top shaft passes through the central hole of the auxiliary driving wheel, the mounting hole position of the vertical plate of the frame and the central hole of the driven wheel and is limited by a shaft retaining ring. A spring is sleeved on the front rolling roller top shaft. One end of the spring abuts against the inner shoulder of the central hole of the auxiliary driving wheel, and the other end abuts against the side surface of the flange on the front rolling roller top shaft, forming a quick disassembly structure; the driven wheel and the auxiliary driven wheel are arranged on the vertical plate through bearing devices arranged at the mounting hole positions on the vertical plate.

[0063] The rear rolling roller is also arranged on a hollow shaft, and one end of a rear rolling roller top shaft is respectively abutted against both ends of the hollow shaft. The other end of each rear rolling roller top shaft passes through the central hole of the auxiliary driven wheel, the mounting hole position of the vertical plate of the frame and the central hole of a shaft stopper and is limited by a shaft retaining ring. A spring is sleeved on the rear rolling roller top shaft. One end of the spring abuts against the inner shoulder of the central hole of the auxiliary driven wheel, and the other end abuts against the side surface of the flange on the rear rolling roller top shaft, forming a quick disassembly structure; the auxiliary driven wheel and the shaft stopper are arranged on the vertical plate through bearing devices arranged at the mounting hole positions on the vertical plate.

[0064] In the rolling mechanism, the front rolling roller and the rear rolling roller are sponge rolling rollers.

[0065] Preferably, for the selection of the sponge rolling roller, the diameter should be 5 - 10 mm larger than the overall height of the crawler.

[0066] The sponge rolling roller is thin in the middle and thick at both ends, and the relatively thin middle section and the relatively thick end sections are smoothly transitioned.

[0067] Specifically, the axial length of the relatively thin middle section is 12 - 20 mm.

[0068] The diameter of the middle section is 2 - 5 mm smaller than the diameters of the two end sections.

[0069] Preferably, the sponge hardness of the sponge roll: 36 - 40°.

[0070] Such a sponge roll can ensure the effect of thicker in the middle and thinner at both sides of the coating, and ensure the brushing quality of the seams of the storage board. The method for brushing the airtight material between the seams of the wall panels of the controlled atmosphere fresh - keeping storage using the above - mentioned brush - painting machine is as follows:

[0071] Step 1: Install the barrel of the feeding mechanism filled with the airtight material or adhesive liquid on the frame.

[0072] Step 2: Install the cloth - feeding reel with the cloth material wound between two cloth - shaft retainers on the feeding reel on the frame, and pass the end of the cloth material through between the nozzle of the barrel and the front roll, place the cloth material on the front roll, and let the end of the cloth material hang down naturally and extend a certain length below the bottom of the brush - painting machine.

[0073] Step 3: Adjust the position of the brush - painting machine, place it on the ground or on the kick - board at the lower part of the wall panel and align the mid - line of the cloth material with the board seam. The front end of the crawler - type walking mechanism of the brush - painting machine adsorbs to the wall of the color steel plate.

[0074] Step 4: Start the forward switch of the feeding drive device in the feeding mechanism. Until the airtight material is extruded onto the cloth material, start the forward switch of the motor of the walking mechanism. The brush - painting machine climbs upward along the wall. Under the action of the front roll and the rear roll, the airtight material is brushed on the wall and pressed into the board seam. The cloth material adheres to the wall until the brush - painting machine reaches the top of the wall.

[0075] Step 5: Turn off the forward switch of the feeding drive device in the feeding mechanism, turn on the reverse switch, so that the push - plate device connected to the extrusion piston in the barrel retracts. At the same time, turn off the forward switch of the motor in the walking mechanism and turn on the reverse switch of this motor to send the brush - painting machine to the ground.

[0076] Align the brush - painting machine with the next board seam and repeat the above steps 1 - 5 to carry out the brushing operation.

[0077] Furthermore, in Step 4, when the brush - painting machine starts to climb, it is necessary to first press the end of the cloth material at the bottom of the machine to prevent the cloth material from being rolled onto the rear roll as the rear roll rotates at the beginning of work. After the rear roll rolls to adhere the cloth material to the wall, the pressing can be released and the brush - painting machine can walk automatically.

[0078] Preferably, after brushing at least two board seams, replace the front roll and / or the rear roll. Because the roll will stick with the adhesive liquid during the brushing process, and the old adhesive liquid has a greater adhesive force than the adhesive liquid just extruded from the barrel. If the roll is not replaced, there is a risk of the cloth being rolled into the rear roll.

[0079] To ensure the brushing quality, there is a matching relationship between the walking speed of the walking mechanism and the feeding speed of the feeding mechanism. A preferred matching relationship is:

[0080] The walking speed of the painting machine: 2.4 - 3 m / min; the moving speed of the extrusion piston: 62 - 78 mm / min.

[0081] In the above matching relationship, the diameter of the extrusion piston in the feeding mechanism: 65 - 75 mm, and the linear motion mechanism connected to the push plate device is a screw mechanism, where the pitch of the lead screw: 2.5 - 4 mm.

[0082] Preferably, the length of the cloth material wound on the cloth feeding reel should be 5 - 10 cm shorter than the length of a vertical seam of a board wall, so that when the painting machine reaches the ceiling, the front roller contacts the roof first. At this time, all the cloth material on the cloth feeding reel is spread out and attached to the wall surface, and the vertical seam part of the storage board near the ceiling that is empty needs to be manually brushed and pasted with cloth.

[0083] The airtight material painting machine for the board seams between the wall panels of the controlled atmosphere fresh - keeping storage provided by the present invention automatically applies airtight materials to the board seams of the iron - type material board wall and pastes cloth materials on the board seams, replacing manual painting work. It can automatically walk vertically on the wall by power, and complete gluing and pasting cloth materials at one time, making the painting operation simple and convenient; the walking mechanism with a permanent magnet track belt adopted by this painting machine can firmly adsorb on the iron - type material board wall such as color steel plate, etc., which is safe and reliable. Using this painting machine only requires 1 - 2 people, saving personnel, reducing processes, and also improving the uniformity of the coating thickness. The rubber material is evenly and continuously squeezed into and filled in the board seam gaps, and it can also avoid the safety hazards of high - altitude construction during manual operation and reduce the risk of high - altitude operation of multiple people.

[0084] The following further illustrates the present invention through the drawings and embodiments. Description of the Drawings

[0085] Figure 1 It is a three - dimensional structure schematic diagram of the airtight material painting machine for the board seams between the wall panels of the controlled atmosphere fresh - keeping storage provided by the present invention.

[0086] Figures 2a to 2c It is a structure schematic diagram of a specific example of the frame of the painting machine. Among them:

[0087] Figure 2a It is a three - dimensional structure schematic diagram; Figure 2b It is a top - view structure schematic diagram; Figure 2c It is a side - view structure schematic diagram.

[0088] Figures 3a to 3e-1 It is a structure schematic diagram of a specific example of the walking mechanism of the painting machine. Among them:

[0089] Figure 3a It is a three - dimensional structure schematic diagram; Figure 3b It is at Figure 3aSchematic diagram of adding a frame flat plate and a vertical plate on the basis of Figure 3c is Figure 3b Side view structure schematic diagram of Figure 3d is Figure 3c A-A sectional view structure schematic diagram of Figure 3d-1 is Figure 3d Stereo structure schematic diagram of Figure 3e is Figure 3c C-C sectional view structure schematic diagram of Figure 3e-1 is Figure 3e Stereo structure schematic diagram of

[0090] Figures 4a to 4n Schematic diagram of the structure of a specific example of the feeding mechanism of the coating machine. Among them:

[0091] Figure 4a Stereo structure schematic diagram of the feeding mechanism; Figure 4a-1 Stereo structure schematic diagram of the feeding mechanism from another perspective; Figure 4b Side view structure schematic diagram of the feeding mechanism; Figure 4c End face structure schematic diagram of the open end of the feeding mechanism; Figure 4d is Figure 4c A-A sectional view structure schematic diagram of Figure 4e Exploded stereo structure schematic diagram of the extrusion piston, the push plate and the screw drive mechanism; Figure 4f and Figure 4g are respectively Figure 4d Stereo structure schematic diagram of the right side and the left side of the part after removing the barrel of the device shown; Figure 4h is Figure 4f Front view structure schematic diagram of the device shown; Figure 4i is Figure 4h Left view structure schematic diagram of Figure 4j is Figure 4i A-A sectional view structure schematic diagram of , showing the structure of the barrel bearing seat and its upper components in the feeding mechanism; Figure 4k Stereo structure schematic diagram of the nozzle in the feeding mechanism; Figure 4I is the front view structure schematic diagram of the nozzle shown in Figure 4k; Figure 4m is Figure 4k Left view structure schematic diagram of the nozzle of Figure 4n Bottom view structure schematic diagram of Figure 4I, showing the structure of the discharge nozzle outlet.

[0092] Figures 5a to 5i Schematic diagram of the structure of a specific example of the cloth feeding mechanism of the coating machine. Among them:

[0093] Figure 5a Stereo structure schematic diagram of the cloth feeding mechanism; Figure 5b is Figure 5a Front view structure schematic diagram of the cloth feeding mechanism shown; Figure 5c isFigure 5b Schematic diagram of the A-A sectional structure and enlarged structure diagram of the ejector pin seat; Figure 5c-1 Stereoscopic structure diagram of the A-A section of FIG. 5b: Figure 5c-2 is Figure 5c-1 Partial enlarged structure diagram of part B in; FIG. 5d is a stereoscopic structure diagram of the feeding mechanism arranged on the frame and provided with a pressing cloth elastic sheet; Figure 5e Stereoscopic structure diagram showing the upward view angle of the feeding mechanism on the frame; Figure 5f is Figure 5d Top view structure diagram of the device shown; Figure 5g is Figure 5d Front view structure diagram of the device shown; Figure 5h is Figure 5g A-A sectional structure diagram of (also the B-B sectional structure diagram of FIG. 3c); Figure 5i is Figure 5g A-A sectional structure diagram of (also Figure 3c Stereoscopic structure diagram of the B-B section).

[0094] Figures 6a to 6d Structure diagram of a specific example of the pressure roller mechanism of the coating machine described above. Among them:

[0095] Figure 6a Stereoscopic structure diagram of two rolling rollers installed on two vertical plates of the frame; Figure 6b is Figure 6a Front view structure diagram of; Figure 6c is Figure 6b A-A sectional structure diagram of; Figure 6d is Figure 6b B-B sectional structure diagram of.

[0096] Figures 7a to 7d Stereoscopic and top view structure diagrams of the airtight fresh-keeping warehouse wall panel seams coated with the coating machine of the present invention. Among them:

[0097] Figure 7a End face structure diagram of the wall panel; Figure 7b Stereoscopic structure diagram of the wall panel; Figure 7c Structure diagram of the combination of two wall panels; Figure 7d is Figure 7c End face structure diagram of.

[0098] Figure 8a and Figure 8b Schematic diagram of the force condition when the coating machine provided by the present invention walks on the wall. Among them:

[0099] Figure 8a Show the distribution of the suction force of the permanent magnet blocks on the walking mechanism, Figure 8bShow the distribution of the suction torque required to overcome the overturning torque.

[0100] Wherein:

[0101] Frame 1, flat plate 11, feeding mechanism adjusting plate 111, vertical long hole 111a, long notch 112, vertical plate 12, transition plate 121, horizontal long hole 121a, synchronous belt tensioning plate 122, vertical long hole 122a, cloth feeding reel hole 123, front roller bearing hole 124, rear roller bearing hole 125;

[0102] Traveling mechanism 2, driving wheel 21, driven wheel 22, main crawler belt 23, magnet block 231, speed regulating motor 24, auxiliary driving wheel 25, auxiliary driven wheel 26, auxiliary crawler belt 27, magnet block 271;

[0103] Feeding mechanism 3, barrel 31, extrusion piston 311, piston O-ring 311a, push plate 312, screw 313, nut 313a, card slot 313b, flat washer 313c, shaft retaining ring 313d, keyway 313e, feeding motor 314, synchronous belt driving wheel 315, synchronous belt driven wheel 316, bearing 317, anti-rotation block 318, barrel bearing seat 32, motor mounting plate (synchronous belt tensioning plate) 321, long hole 321a, bearing seat sleeve 322, barrel lower support plate 33, barrel upper pressing plate 34, nozzle 35, nozzle pressing ring 35a, nozzle O-ring 35b, outlet 35c, pull rod 36;

[0104] Cloth feeding mechanism 4, cloth feeding reel 41, cloth winding shaft section 411, thimble seat 42, axial stepped through hole 421, shoulder 422, flange 423, reel thimble 43, card slot 431, flange 432, spring 44, cloth shaft retaining piece 45; shaft retaining ring 46, cloth pressing elastic piece 47;

[0105] Rolling mechanism 5, front roller 51, hollow shaft 51a, rear roller 52, hollow shaft 52a, roller top shaft 53, retaining ring card slot 53a, flange 53b, axial screw hole 53c, needle roller bearing 54, bearing seat 54a, spring 55, shaft retaining part 56, shaft retaining ring 57;

[0106] Storage board 6, color steel board 61, polyurethane board 62, concavo-convex structure on the board surface 63, storage board insertion structure 64, board seam 65. Specific implementation mode

[0107] As Figure 1 Shown is a specific embodiment of the airtight material painting machine for the board seam of the wall panel of the controlled atmosphere fresh-keeping storage provided by the present invention, including a frame 1, and the mechanisms arranged on the frame 1 are a traveling mechanism 2, a feeding mechanism 3, a cloth feeding mechanism 4 and a rolling mechanism 5;

[0108] The frame 1 includes a framework, as Figures 2a to 2cAs shown, the frame includes a flat plate 11 and two vertical plates 12 connected downward at two side edges of the flat plate 11. The aforementioned traveling mechanism 2, feeding mechanism 3, cloth feeding mechanism 4, and rolling mechanism 5 are all installed on the frame 1.

[0109] See Figure 1 , the traveling mechanism 2 is a crawler-type traveling mechanism. The crawler-type traveling mechanism includes a main crawler traveling mechanism, which includes two sets of main crawler devices and motors. The motors are fixed on the frame. Each set of the main crawler devices includes a driving wheel 21, a driven wheel 22, and a main crawler 23 that are connected to each other. There are two motors 24 as the power sources for the two sets of main crawler devices. In one set of the main crawler devices, the driving wheel 21 and the driven wheel 22 are respectively arranged at the rear end and the front end on one side vertical plate 12 of the frame 1. The driving wheel 21 is connected to the motor 24. The axle of the driven wheel 22 is fixed on the vertical plate 12 through bearings. The driving wheel is fixed on the vertical plate 12 and connected to the motor 24 also fixed on the vertical plate 12. The main crawler 23 is sleeved and fixed on the driving wheel 21 and the driven wheel 22. Through such a structure, the two main crawlers in the two sets of main crawler devices are respectively located outside the two side vertical plates of the frame 1. A number of permanent magnet blocks 231 are fixed on the outer surface of the crawler of the main crawler 23, thereby enabling this painting machine to walk on a metal wall and implement the painting of the airtight material for wall seams. The force-bearing situation of this painting machine when walking vertically on the wall is as Figure 8a and Figure 8b shown. The suction force F of the magnet blocks on the crawler causes the painting machine to have a positive pressure on the wall. Positive pressure * coefficient of friction will generate a frictional force N opposite to the direction of motion. When this painting machine walks vertically upward on the wall, the forces that need to be overcome are: 1. The torque of the total mass G of the machine * the distance from the centroid to the wall; 2. The sliding force of the painting machine under the action of its own weight. The following will be discussed separately:

[0110] A. The torque of the total mass G of the machine * the distance L from the centroid to the wall.

[0111] As Figure 8b shown, taking the magnet that is in contact with the wall at the bottom of the painting machine as the 0 point, the higher up, the larger the force arm Ln, and the larger the moment Fn * Ln. To ensure the safety of the machine when walking on the wall, the set of magnet suction torques is required, that is, the set of torques of the suction force of each permanent magnet block * the force arm of the vertical distance from the magnet to the 0 point to balance the torque of the machine's center of gravity G * the vertical distance L from the machine's center of gravity to the 0 point (the distance from G to the wall).

[0112] The total mass of the painting machine is G, the vertical distance from the centroid of the painting machine to the 0 point is L, and the overturning moment F' is G·L. To enable the painting machine to walk vertically on the wall safely, it should satisfy:

[0113] G·L = F1*L1 + F2*L2 + F3*L3 +.....

[0114] +Fn*Ln = F*(L1 + L2 +......+ Ln) (1)

[0115] Where: F = F1 = F2 =..... = Fn, the suction force of each magnet;

[0116] L1, L2,......Ln, the vertical distance from the position of each magnet to point 0;

[0117] In the formula: G - total mass of the painting machine; L - vertical distance from the center of mass of the painting machine to point 0.

[0118] F1, F2,........Fn - the suction force of each magnet block; in the present invention, the magnet blocks on the crawler belt are of equal size, and the suction force F of each magnet block is also equal. Therefore,

[0119] F1 = F2 =........Fn = F (2)

[0120] Through force analysis, it is known that the heavier the total mass G of the painting machine, the larger the vertical distance L from the center of mass to point 0, and the larger the overturning moment F' of the painting machine. The greater the torque required to overcome it. This is also an important factor to be considered in the subsequent design.

[0121] B. The magnetic force of the painting machine also needs to overcome the downward sliding caused by the weight;

[0122] N = -G = ∑F*K (3)

[0123] In the formula: N - the frictional force to overcome the downward sliding of the painting machine;

[0124] -G - the total mass of the painting machine;

[0125] ∑F - the set of magnet suction forces;

[0126] K - the friction coefficient;

[0127] Considering from the aspect of the downward sliding force, the suction force of the magnet can overcome the downward sliding of the painting machine under the action of gravity and increase the frictional force to make it crawl upward. However, if the suction force of the magnet is too large, it will increase the total power of the traveling motor, thus increasing the total weight of the machine and also affecting the crawling of the painting machine. From the force analysis, the frictional force is opposite to the traveling direction of the painting machine. When the painting machine travels upward, the frictional force is downward; vice versa. Therefore, not only the number of magnet blocks needs to be considered, but also the size, shape and distribution will affect the operation of the painting machine. Through the above analysis, it is known that for the painting machine provided by the present invention, the crawler-type traveling mechanism can be provided with only the main crawler traveling mechanism. However, considering the structure of the painting machine and the safety of the painting machine during operation, another pair of auxiliary crawler devices are designed on the painting machine to strengthen the magnet suction force at the front of the painting machine. The total length of the machine can be shortened.

[0128] In a more preferred embodiment, the crawler type traveling mechanism in the traveling mechanism 2 further includes an auxiliary crawler traveling mechanism, which is arranged at the front part of the frame and includes two sets of auxiliary crawler devices. Each set of auxiliary crawler devices includes an auxiliary driving wheel 25, an auxiliary driven wheel 26 and an auxiliary crawler 27. The auxiliary driving wheel 25 is coaxial with the driven wheel 22 in the aforementioned main crawler mechanism. The driven wheel 22 and the auxiliary driving wheel 25 are installed on the roller shaft of the front roller 51 in the rolling mechanism 5 (detailed later). The auxiliary driven wheel 26 is installed on the roller shaft of the rear roller 52 in the rolling mechanism 5 (detailed later). The auxiliary crawler 27 is fixed on the auxiliary driving wheel 25 and the auxiliary driven wheel 26. The two auxiliary crawlers 27 are located inside the two main crawlers and are arranged inside the vertical plate 12 of the frame 1. Permanent magnet blocks 271 are also provided on the outer surface of the auxiliary crawler. A pair of auxiliary crawler devices are designed at a position far from the 0 point, that is, at the front part of the painting machine. The auxiliary crawler 27 is arranged in parallel with the main crawler 23.

[0129] The specific structure of the traveling mechanism 2 including the main crawler traveling mechanism and the auxiliary crawler traveling mechanism is as follows:

[0130] As Figures 2a to 2c and Figures 3a to 3e shown, at the rear ends of the two vertical plates 12 of the frame 1, a transition plate 121 is fixedly connected by screws or rivets respectively. The transition plate 121 is provided with a horizontally long hole 121a extending in the front and rear directions (see Figure 2a and FIG. 2c). A synchronous belt tensioning plate 122 is connected to each transition plate 121 and is fixed on the transition plate 121 by bolts. The speed regulating motor 24 is fixed on the synchronous belt tensioning plate 122. The front and rear positions of the speed regulating motor 24 can be adjusted through the transition plate 121, so as to realize the tensioning of the two main crawlers 23. The speed regulating motor 24 is fixed inside the synchronous belt tensioning plate. The motor shaft extends out of the frame 1 through a vertically extending long hole 122a on the synchronous belt tensioning plate 122 (see Figure 2a and Figure 2c ), and the driving wheel 21 is fixedly connected to the end of the motor shaft. The vertical long hole 122a enables the speed regulating motor 24 to also make position adjustment in the vertical direction of the frame.

[0131] For each set of auxiliary crawler devices in the auxiliary crawler traveling mechanism, the coaxial connection structure between the auxiliary driving wheel 25 and the driven wheel 22 in the main crawler device is as Figure 3dAs shown, the driven wheel 22 in the main crawler device and the auxiliary drive wheel 25 in the auxiliary crawler device are fixed in the front roller bearing holes 124 at the front ends of the vertical plates 12 on the frame 1 through needle roller bearings 54. Two toothed main crawlers 23 are arranged on the drive wheel 21 and the driven wheel 22, outside the two vertical plates 12. Two toothed auxiliary crawlers 27 are arranged on the auxiliary drive wheel 25 and the auxiliary driven wheel 26, inside the two vertical plates 12. The auxiliary crawler 27 is parallel to the main crawler 23. The two speed-regulating motors 24 are designed to run synchronously and in the same direction. The synchronous operation of the two speed-regulating motors 24 can be achieved through a conventional electric control system, which is prior art and will not be elaborated here.

[0132] For the motor in the crawler traveling mechanism, one motor can also be set up, and two sets of main crawler devices are connected through a speed reducer and a transmission mechanism. However, considering the weight design, such a design will have a greater total weight and a higher center of gravity than the scheme of setting two motors. The overturning moment to be overcome is greater. In this way, the structure of the painting machine of the present invention will be bulky.

[0133] As Figure 3b shown, the fixing of the drive wheel 21 and the output shaft of the motor 24.

[0134] As Figure 3c and Figure 3d and Figure 3d-1 shown, the installation structure of the driven wheel 22 and the auxiliary drive wheel 25 on the frame 1 is specifically as follows: Bearing seats 54a are arranged in the front roller bearing holes 124 on the two vertical plates 12. Needle roller bearings 54 are arranged in the bearing seats 54a. Both the driven wheel 22 and the auxiliary drive wheel 25 are hollow wheels with an axially penetrating stepped hole. The large-diameter holes of the driven wheel 22 and the auxiliary drive wheel 25 are arranged in the needle roller bearings 54 opposite to the vertical plates 12. Roller top shafts 53 are inserted through the two stepped holes. A retaining ring groove 53a is arranged at the end of the roller top shaft 53 located at the driven wheel end, and an axial retaining ring (not shown in the figure) is arranged therein as the axial limiting structure of the roller top shaft 53. A flange 53b is arranged at the other end of the shaft section of the roller top shaft 53 located in the large-diameter hole of the auxiliary drive shaft 25. A spring 55 is sleeved on this shaft section of the roller top shaft. One end of the spring 55 abuts against the flange 53b, and the other end abuts against the shoulder of the stepped hole formed by the large and small diameters of the auxiliary drive wheel 25. A hollow shaft 51a is arranged, and a front roller 51 is integrally fixed on the hollow shaft 51a. The ends of the two roller top shafts 53 provided with the flanges 53b abut against both ends of the hollow shaft 51a. Through the elastic force, the two roller top shafts 53 apply forces towards each other to the abutting hollow shaft 51a. The driven wheel 22 and the auxiliary drive wheel 25 are connected through the needle roller bearings 54, and the driven wheels 22 in the two sets of main crawler devices and the auxiliary drive wheels 25 in the two sets of auxiliary crawler devices are fixed on the frame.

[0135] As Figure 3c 、 Figure 3e 、Figure 3e-1 and Figure 6d As shown in Figure 6d , the mounting structure of the secondary driven wheel 26 on the frame is specifically as follows: A bearing seat 54a is also provided in the rear roll bearing holes 125 opposite to each other on the two vertical plates 12. A needle bearing 54 is provided in the bearing seat 54a. The structure of the secondary driven wheel 26 is the same as that of the secondary driving wheel, and it also has a stepped hole penetrating axially. The large-diameter end is arranged in the needle bearing 54 with its back facing the vertical plate 12. A roll top shaft 53 is inserted into the stepped hole of the secondary driven wheel. A flange 53b is provided at one end thereof. A spring 55 is sleeved on the roll top shaft 53. One end of the spring 55 abuts against the flange 53b, and the other end abuts against the shoulder formed by the stepped hole of the secondary driven wheel 26. An axial stop member 56 can be inserted into the part of the roll top shaft 53 located at the outer end of the vertical plate 12. One end of the axial stop member 56 is inserted into the inner ring of the needle bearing to be connected to the secondary driven wheel 26. A shaft retaining ring 57 (see Figure 6d ) on the retaining ring groove on the roll top shaft 53 abuts against the axial stop member 56 for axial limitation. A hollow shaft 52a is provided. One end of the two roll top shafts 53 provided with flanges 53b abuts against the hollow shaft 52a. Through the elastic force, the two roll top shafts 53 apply forces to the hollow shaft 52a in opposite directions.

[0136] By designing the traveling mechanism as described above, especially by adding a secondary track mechanism at the front of the painting machine with a relatively large overturning moment, the safety of the painting machine walking vertically on the wall is improved.

[0137] If it is necessary to further increase the suction force of the traveling mechanism on the wall, the track mechanism can be further added. For example, a synchronous driving pulley and a bracket are connected to the outside of the driven wheel 22 described above. The other end of the bracket is provided with a synchronous driven pulley and a bearing assembly. A synchronous belt is provided on the two synchronous pulleys, and permanent magnets are installed on the synchronous belt to achieve the purpose of increasing the suction force.

[0138] Specifically, a synchronous driving pulley and a bracket are installed in the bolt holes reserved on the side of the driven wheel 22; at the other end of the bracket, a synchronous driven pulley and a bearing assembly are installed. A synchronous belt is installed on the synchronous driving pulley and the synchronous driven pulley, and magnets are installed on the synchronous belt. In this way, the purpose of increasing the suction force of the front-end magnets and increasing the anti-overturning moment is achieved (this part is not shown in the figure).

[0139] From the force analysis and structural design, it can be known that the design of the secondary track can effectively shorten the length of the main track under the condition of ensuring the action of the effective adsorption load, and shorten the overall length of the painting machine. If a track mechanism is further added outside the main track to increase the width dimension, it has no influence on the actual use of the painting machine. The design of the secondary track is far from the lowest magnet adsorption point, increasing the anti-overturning moment.

[0140] In the embodiment provided by the present invention, the following designs are also made for the size, shape, magnet characteristics and distribution of the magnet blocks on the track:​​

[0141] As shown Figure 3a in the figure, the shape of the permanent magnet blocks on the main track 23 and the auxiliary track 27 is a cylinder, with a perforation in the axial direction, forming an annular plate. The material is one of the N48-N52 permanent magnets, with an outer diameter of 10 mm and a thickness of 3 mm. A countersunk hole of M3 mm is provided on the magnet block (as Figure 3a shown in the figure), and is fixed on the main track 23 and the auxiliary track 27, that is, the four synchronous belts, with bolts of M3×6 and matching nuts. On each track, two rows are evenly distributed side by side in the width direction. The spacing between adjacent magnet blocks in the width direction of the track is 14 mm, and the spacing in the length direction of the track, that is, the column spacing, is 15.5 mm.

[0142] In addition, the wall of the controlled atmosphere fresh-keeping storage is made of color steel plate, and the thickness of the color steel plate is relatively thin, which has a certain influence on the magnet suction force. In this embodiment, the thickness of the color steel plate is 0.426 - 0.476 mm. Therefore, it is best to use the main track device and the auxiliary track device at the same time, which can effectively reduce the influence of the too thin thickness of the color steel plate on the suction force and shorten the total length of the equipment.

[0143] As Figure 1 , Figure 2a and Figures 4a to 4i shown in the figure, the feeding mechanism 3 includes a feed cylinder 31, which is fixed on the longitudinal center line of the flat plate 11 of the frame. A long slot 112 is opened along the longitudinal center line at the rear end of the flat plate 11. A pair of feeding mechanism adjusting plates 111 are arranged to extend downward at the rear end of the long slot. Vertical long holes 111a are provided on the feeding mechanism adjusting plates 111, and a feed cylinder bearing seat 32 is fixed on the feeding mechanism adjusting plates 111 through bolts.

[0144] A feed cylinder supporting device is arranged at the front part of the flat plate 11 of the frame 1, which includes a feed cylinder lower support plate 33 and a feed cylinder upper pressing plate 34; one end of the feed cylinder 31 is seated on the arc-shaped supporting surface of the feed cylinder lower support plate, and the arc-shaped surface of the feed cylinder upper pressing plate 34 presses on the feed cylinder 31 to fix this end of the feed cylinder on the frame 1. The feed cylinder lower support plate 33 and the feed cylinder upper pressing plate are fixedly connected into one body through bolts. The other end of the feed cylinder 31 is fixed on the feed cylinder bearing seat 32, and at the same time, the feed cylinder bearing seat 32 also serves as the rear cover of the feed cylinder 31. A nozzle 35 is arranged at the front end discharge port of the feed cylinder 31. The rear port of the nozzle 35 is sleeved on the discharge port of the feed cylinder 31. A nozzle O-ring 35a is arranged on the nozzle 35 and is pressed on the discharge port of the feed cylinder 31 through a nozzle pressing ring 35a. A nozzle O-ring seal 35b is arranged between the nozzle pressing ring 35a and the discharge port of the feed cylinder 31 (see Figure 4d ).

[0145] A pressure sealing device is also provided to press the nozzle 35 and the feed cylinder 31 tightly on the feed cylinder bearing seat 32. The structure of this pressure sealing device is as Figure 4a , Figure 4band Figure 4c As shown, two through holes are set on the outer edge of the nozzle pressure ring 35a at an interval of 180°. Correspondingly, through holes are also set on the lower support plate 33 of the barrel and the barrel bearing seat 32. Two tie rods 36 are passed through the corresponding through holes. Threads are set at both ends of the tie rods 36 and fixed by two nuts, so that the nozzle 35 and the rear cover, i.e., the barrel bearing seat 32, are pressed against the discharge port and the rear port of the barrel by the two tie rods 36 located on both sides of the barrel to seal the barrel 31.

[0146] like Figures 4k to 4n As shown, in the feeding mechanism 3, the front end opening 35c of the nozzle 35 faces downward and corresponds to the front roller 51 in the roller mechanism 5. The opening 35c discharges the glue liquid, so the shape and size of the opening 35c have a great influence on the effect of applying the glue liquid. Figure 4n As shown, the front opening 35c is in the shape of a slit. The width of the slit is 3-10mm and the length is 70-80mm. The slit of the opening 35c is wider in the middle and gradually narrows on both sides. The width in the middle is 5-8mm, and the width on both sides is 3-5mm. The length of the wider slit section in the middle is 21-25mm. Such an opening can well fill the gap in the board wall with glue, and can also apply a proper amount of glue on both sides of the gap for adhering non-woven fabrics. Furthermore, as Figure 4n As shown, a grille can be provided in the width direction of the opening. Two grilles divide the opening into a middle section and two side sections. The grilles serve as reinforcing ribs to stabilize the size of the opening so that the structure will not be deformed by the higher pressure of the glue flow, resulting in changes in the amount of glue output affecting the coating quality. At the same time, such a structure is more conducive to aligning the gap in the plate wall, and the amount of glue output is larger. In the matching roller mechanism, the sponge roller is thin in the middle and thick on both sides, forming a glue output state with a larger glue thickness in the middle, which is convenient for filling the plate seams and improving the glue coating quality. An extrusion piston 311 is provided in the barrel 31. A piston O-ring 311a is provided on the extrusion piston 311 to form a sealing structure with the inner wall of the barrel. A push plate 312 is provided at the rear of the extrusion piston 311. One end of a screw rod 313 is connected to the push plate 312. The other end of the screw rod 313 passes through the barrel bearing seat 32 at the rear end of the barrel 31 and is connected to a feeding drive device, so that the push plate device including the push plate and the screw rod pushes the extrusion piston 311 to move toward the nozzle in the barrel 31, so that the glue in the barrel 31 is squeezed out from the nozzle 35.

[0147] like Figure 4eAs shown in the figure, the connection structure between the lead screw 313 and the push plate 312 and the relationship between the push plate and the extrusion piston 311 are as follows: At the end of the lead screw 313, there is a smaller-diameter end. On this smaller-diameter end, there is a clamping groove 313b. A flat washer 313c is sleeved on the lead screw 313 and passes through the central axis hole of the push plate 312 with a concave middle. An axial retaining ring 313d is clamped in the clamping groove 313b at the end of the lead screw 313 extending out of the push plate 312. The axial retaining ring 313d is recessed in the concave space of the push plate, thereby fixing the push plate 312 to the end of the lead screw 313. The extrusion piston 311 is also a concave disk, and is fixed in the barrel 31 with the concave side facing the push plate 312. An annular groove is provided on the outer circumferential surface of the extrusion piston 311, and a piston O-ring 311a is embedded in this annular groove to form a sealing structure with the inner wall of the barrel 31, dividing the barrel into two closed spaces in the front and back. The annular end face of the push plate 312 can extend into the concave space of the extrusion piston 311 and abut against the bottom surface of the concave space, forming a surface contact with the extrusion piston. Under the action of the feeding drive device, the extrusion piston 311 is pushed towards the nozzle direction. When the feeding drive device moves in the reverse direction, the push plate 312 moves backward, but the extrusion piston 311 remains in place. Such a piston structure is conducive to the separation of the barrel and the extrusion piston in contact with the glue solution from the feeding drive device not in contact with the glue solution.

[0148] The rear surface of the extrusion piston 311 with a concave space and the surface contact structure where the push plate 312 is inserted into the concave space make the circumferential surface contact structure of the two have the function of coaxial positioning. The lead screw is a slender structural member and has a tendency to swing. Through the concave circumferential surface contact structure, the lead screw is more stable.

[0149] It is better that the outer diameter of the push plate 312 is 8 - 11 mm smaller than the outer diameter of the extrusion piston 311. For example, in a specific embodiment, the outer diameter of the push plate is 11 mm smaller than the outer diameter of the extrusion piston.

[0150] In the example as Figures 4d to 4j shown, the feeding drive device includes a feeding motor 314, which is arranged on a motor mounting plate 321 fixedly connected to the barrel bearing seat 32. The feeding motor 314 is located at the position of the long slot 112 on the upper flat plate 11 of the bracket 1. The function of the long slot 112 is to leave a position to avoid interference between the feeding motor 314 and the flat plate 11 of the frame 1 when adjusting the position of the barrel 31. The lead screw 313 constitutes a spiral linear transmission mechanism, and a feeding synchronous belt transmission mechanism is also provided between this spiral linear transmission mechanism and the feeding motor 314. The specific structure is:

[0151] The side of the barrel bearing seat 32 located inside the cavity of the barrel 31 is the inner side, and the opposite side is the outer side. A bearing seat sleeve 322 is fixedly connected to the outer side of the barrel bearing seat 32. A nut 313a is engaged with the lead screw 313. A large synchronous pulley 316 is sleeved and fixed on the nut 313a. A needle roller bearing 317 is arranged in the radial gap between the large synchronous pulley 316 and the bearing seat sleeve 322. The fixing structure of the nut 313a and the large synchronous pulley 316 is that the large synchronous pulley 316 is sleeved on the nut 313a loosely, and then the nut 313a is axially fixed on the large synchronous pulley 316 by screws, forming a component. The nut 313a cannot move axially because it is fixed on the large synchronous pulley 316 which is fixed on the bearing seat sleeve 322 through the needle roller bearing 317.

[0152] A small synchronous pulley 315 is connected to the output shaft of the feeding motor 314, and a synchronous belt (not shown in the figure) is arranged between the small synchronous pulley 315 and the large synchronous pulley 316 fixedly connected to the nut 313a. Vertical long holes 321a are provided on the motor mounting plate 321, and the up and down position of the motor mounting plate 321 can be adjusted, so as to adjust the up and down position of the feeding motor 314, and then the tightness of the synchronous belt between the small synchronous pulley 315 and the large synchronous pulley 316 can be adjusted. Therefore, the motor mounting plate 321 is also called the synchronous belt tensioning plate.

[0153] In order to prevent the lead screw 313 from rotating, a rotation stop block 318 is arranged on the inner side of the barrel bearing seat 32, and a rotation stop structure for restricting the rotation of the lead screw 313 is formed with the lead screw 313. The rotation stop structure is that a through keyway 313e is provided on the lead screw 313, and the protruding part on the rotation stop block 318 fixed on the barrel bearing seat 32 is embedded in the through keyway 313e, so that when the nut 313a rotates in place driven by the feeding motor 314, the lead screw can only move linearly relative to the rotation stop block 318 and cannot rotate, and moves in the barrel 31 to drive the push plate 312 to extrude the piston 311 and extrude the coating material in the barrel 31.

[0154] The barrel bearing seat 32 can adjust the height position of the rear end of the barrel 31 through the vertical long holes 111a on the feeding mechanism adjusting plate 111. The height of the front end of the barrel 31 can be realized by adding gaskets between the lower support plate 33 of the barrel and the flat plate 11 of the bracket 1. Thus, by adjusting the height position of the barrel 31 before and after, the gap between the discharge port of the nozzle 35 and the front roller 51 in the roller mechanism 5 is further adjusted. The vertical long holes 321a on the motor mounting plate 321 can adjust the position of the feeding motor 314 up and down to realize the tensioning of the feeding synchronous belt transmission mechanism. Therefore, the above feeding mechanism can realize the double adjustment of the up and down height positions of the barrel 31 and the feeding motor 314.

[0155] As Figures 5a to 5i shown, the cloth feeding mechanism 4 includes a cloth feeding reel 41 and a cloth pressing elastic piece 47.

[0156] At both ends of the cloth feeding reel 41, it is fixedly arranged in the cloth feeding reel hole 123 (see Figure 2c ) of the vertical plate 12 on the frame 1 through the thimble seat 42.

[0157] Specifically, as Figure 5c and Figure 5i shown, the cloth feeding reel 41 is a hollow shaft, and both ends thereof respectively abut against a reel thimble 43. In the two opposite cloth feeding reel holes 123 on the two opposite vertical plates 12 on the frame 1, a thimble seat 42 is respectively arranged. The thimble seat 42 has an axial stepped through hole 421 (see Figure 5c ). A shoulder 422 is formed in the stepped through hole, and a flange 423 is arranged on its outer peripheral surface. One end of the thimble seat 42 is inserted into the cloth feeding reel hole 123 on the vertical plate 12 from the inside to the outside, and the flange 423 abuts against the inner side surface of the vertical plate 12 and is fixed by screwing (see Figure 5e ). One end of the reel thimble 43 abuts against one end of the cloth feeding reel 41, and the other end passes through the stepped through hole 421 of the thimble seat arranged in the cloth feeding reel hole 123 of the vertical plate 12. A clamping groove 431 is arranged on the reel thimble 43, and a shaft retaining ring 46 is clamped in the clamping groove to axially position the reel thimble. A flange 432 (see Figure 5c ) is arranged at the end of the reel thimble 43 that abuts against the cloth feeding reel 41. A spring 44 is sleeved on the reel thimble 43. One end of the spring 44 abuts against the flange 432, and the other end abuts against the shoulder 422 of the stepped through hole 421 of the thimble seat. Through the elastic force, the two reel thimbles 43 apply forces to the hollow shaft of the cloth feeding reel 41 in opposite directions.

[0158] The middle of the cloth feeding reel 41 is a cloth winding shaft section 411, and cloth shaft retaining pieces 45 are fixed at both ends of the cloth winding shaft section 411.

[0159] The cloth pressing elastic piece 47, one end of which is fixed on the frame 1 by bolts (see Figure 5f ), and the other end corresponds to the cloth winding shaft section. During use, the cloth pressing elastic piece 47 presses the cloth unrolled from the cloth feeding reel to make it flat without accumulation. The end of the cloth pressing elastic piece 46 fixed to the frame 1 is fixed on the bottom surface of the flat plate 11 in the frame 1.

[0160] The rolling mechanism 5 includes a front rolling roller 51 and a rear rolling roller 52.

[0161] If there is only the main crawler traveling mechanism, borrowing the Figures 6a to 6d shown traveling mechanism with a main crawler and a sub-crawler, the rolling mechanism can be such a structure:

[0162] The front roller 51 is provided on a hollow shaft 51a. At both ends of the hollow shaft 51a, a front roller top shaft is abutted respectively. The other end of each front roller top shaft sequentially passes through a roller top pin sleeve (not shown in the figure), the mounting hole position of the vertical plate 12 of the frame 1, and the center hole of the driven wheel 22 and is limited by a shaft retaining ring 57. A spring 55 is sleeved on the front roller top shaft. One end of the spring 55 abuts against the shoulder on the stepped center hole of the roller top pin sleeve, and the other end abuts against the flange on the front roller top shaft, forming a quick disassembly structure; the roller top pin sleeve and the driven wheel are arranged on the vertical plate through a bearing device arranged at the mounting hole position on the vertical plate;

[0163] The rear roller 52 is also provided on a hollow shaft 52a. At both ends of the hollow shaft 52a, a rear roller top shaft 53 is abutted respectively. The other end of each rear roller top shaft sequentially passes through a roller top pin sleeve (not shown in the figure), the mounting hole position of the vertical plate 12 of the frame 1, and a shaft blocking member and is limited by a shaft retaining ring. A spring 55 is sleeved on the rear roller top shaft. One end of the spring abuts against the shoulder on the stepped center hole of the roller top pin sleeve, and the other end abuts against the flange on the rear roller top shaft, forming a quick disassembly structure; the roller top pin sleeve and the rear roller top shaft are arranged on the vertical plate through a bearing device arranged at the mounting hole position on the vertical plate.

[0164] If the traveling mechanism includes a main track and a sub-track, then as Figures 6a to 6d , and Figure 3d and Figure 3e , the structures of the front roller fixed shaft and the rear roller top shaft are the same. Therefore, they are uniformly referred to as the roller top shaft 53 hereinafter.

[0165] The front roller 51 is provided on a hollow shaft 51a. At both ends of the hollow shaft 51a, one end of a roller top shaft 53 is abutted respectively. The other end of each roller top shaft 53 passes through the stepped center hole of the sub-driving wheel 25, the mounting hole position of the vertical plate 12 of the frame 1, and the stepped center hole of the driven wheel 22 and is abutted against the shoulder by a shaft retaining ring 57 for limitation. A spring 55 is sleeved on the roller top shaft 53. One end of the spring 55 abuts against the shoulder on the stepped center hole of the sub-driving wheel 25, and the other end abuts against the side surface of the flange 53b on the roller top shaft 53, forming a quick disassembly structure; the driven wheel 22 and the sub-driving wheel 25 are arranged on the vertical plate 12 through a bearing device arranged at the mounting hole position on the vertical plate 12;

[0166] The rear roller 52 is arranged on a hollow shaft 52a. At both ends of the hollow shaft 52a, one end of a roller top shaft 53 is abutted respectively. The other end of each roller top shaft 53 passes through the central hole of the auxiliary driven wheel 26, the mounting hole position of the vertical plate 12 of the frame 1, and the stepped central hole of a shaft retaining member 56 and is limited by a shaft retaining ring 57 against the shoulder. A spring 55 is sleeved on the roller top shaft 53. One end of the spring 55 abuts against the shoulder of the stepped central hole of the auxiliary driven wheel 26, and the other end abuts against the side surface of the flange on the roller top shaft 53, forming a quick disassembly and assembly structure. The auxiliary driven wheel 26 and the shaft retaining member 56 are arranged on the vertical plate 12 through a bearing device arranged at the mounting hole position on the vertical plate 12.

[0167] The front roller 51 is arranged at the front end of the frame and is a sponge roller. The side surface of the front roller 51 protrudes outside the front edge of the frame 1. The outlet 35c of the nozzle 35 at the front end of the barrel 31 in the feeding mechanism 3 is placed above the front roller 51.

[0168] The rear roller 52 is arranged on the frame, located in the middle of the coating machine, behind the cloth feeding reel 41, and is a sponge roller on the hollow shaft 52a between two roller top shafts 53 where the auxiliary driven wheel 26 is installed.

[0169] As can be seen from the above, the connection structures between the front roller 51, the rear roller 52 and the cloth feeding reel 41 and the frame 1 are similar. They are all pressed against the vertical plate 12 of the frame by springs and top shafts at both ends of the hollow shaft, thus forming a quick disassembly and assembly structure. Through this quick disassembly and assembly structure, the front roller 51, the rear roller 52 and the cloth feeding reel 41 can be quickly installed on the frame or removed. During disassembly, the end of the roller top shaft 53 or the reel top pin 43 located outside the vertical plate is pulled outwards. The spring is compressed, and the hollow shaft is separated from the top shaft on this side, and then the front roller 51, the rear roller 52 and the cloth feeding reel 41 can be removed. The same is true during installation. Pull the top shaft at one end, abut one end of the hollow shaft against the top shaft on the other side, and then release the top shaft at this end. Thus, it can be seen that this quick disassembly and assembly structure is very easy to disassemble and install.

[0170] In the embodiment as Figure 3a shown, the front roller 51 is coaxial with the driven wheel 22 and is driven to rotate by it. The rear roller 52 is coaxial with the auxiliary driving wheel 26 and is driven to rotate by it. If it is an example without the auxiliary crawler traveling mechanism, the rear roller 52 can rotate by the friction force with the cloth to roll the cloth material. And the added auxiliary crawler traveling mechanism, especially combined with the front and rear rollers as described above, both rollers are driven by power, and the rolling effect on the cloth material is better.

[0171] During the brushing process, to ensure the brushing quality, after brushing one or two seams, the front and rear rollers need to be removed and cleaned to wash off the adhesive liquid attached to them, improving the roll pressing quality. Also, the cloth feeding reel needs to be frequently disassembled and assembled. Replace the cloth feeding reel that has used up the cloth material with a new cloth roll. This quick disassembly and assembly structure can greatly improve work efficiency.

[0172] In addition, the special connection structure between the aforementioned barrel and the feeding drive device facilitates replacing the barrel that has run out of adhesive liquid with a new barrel filled with adhesive liquid and disassembling the barrel piston for cleaning.

[0173] A specific example of the method for brushing the airtight material between the wall panel seams of the controlled atmosphere fresh-keeping storage using the above-mentioned brush machine is as follows:

[0174] Step 1: Fill the adhesive liquid of the airtight glue into the barrel 31 of the feeding mechanism and install the barrel on the barrel bearing seat 32 on the machine frame.

[0175] Before filling the barrel 31 with airtight glue, apply vaseline paste to the parts that come into contact with the airtight glue, such as inside the barrel, the extrusion piston 311, and the nozzle 35, to ensure that the extrusion piston slides freely in the barrel. Applying vaseline paste not only ensures the lubricated movement of the extrusion piston but also makes the subsequent cleaning of these parts more convenient.

[0176] With the machine in a normal state, fill the barrel with airtight glue and install the nozzle; install the barrel 311 + nozzle 35 filled with airtight glue to the corresponding position of the machine, and use a long pull rod 36 to apply a certain pressure to the nozzle 35 so that the O-ring 35b at the nozzle 35 is under a certain pressure to ensure sealing.

[0177] Correctly install the front roller 51 and the rear roller 52, that is, the correct positions of the 1# and 2# sponge rollers, and check that the rollers rotate flexibly without jamming.

[0178] Step 2: Install the cloth feeding reel 41 on which the cloth material is wound between the two cloth shaft retainers 45 on the cloth feeding reel 41 on the machine frame 1, and pass the end of the cloth material through between the nozzle 35 of the barrel 31 and the front roller 51, place the cloth material on the front roller 51, and let the end of the cloth material hang down naturally and extend a certain length below the bottom of the brush machine.

[0179] Wind the non-woven fabric tightly on the cloth feeding reel 41. The length of the non-woven fabric should be reduced by 50 - 100 mm according to the length of the board seam; install it in the correct position, check that the cloth shaft rotates flexibly without jamming. Let the pressing cloth spring piece 47 press the cloth roll tightly without looseness.

[0180] Pull the non-woven fabric out from under the nozzle, bypass the sponge roller of the front roller by 180°, and let it hang down naturally along the machine, slightly longer than the bottom of the machine by 20 - 40 mm.

[0181] Step 3: Adjust the position of the coating machine, place it on the skirting and align the center line of the cloth with the board seam, and the front end of the crawler-type walking mechanism of the coating machine is adsorbed on the wall of the color steel plate;

[0182] Align the bottom of the non-woven fabric with the board seams and skirting, align the paint sprayer with the board seams, and use magnets to adsorb the paint sprayer onto the color steel wall panel.

[0183] Step 4: Start the forward switch of the feeding drive device in the feeding mechanism until the glue is extruded on the cloth, then start the forward switch of the motor of the walking mechanism, the coating machine climbs up along the board wall, the glue is continuously extruded onto the cloth and brought between the board wall and the board seam, the cloth is adhered to the wall by the rolling of the front roller 51 and the rear roller 52, at the same time, the cloth spreads the glue on the board wall and presses it into the board seam, the cloth adheres to the board wall, and the coating machine continuously moves upward until it reaches the top of the wall, and the entire gap is processed;

[0184] After the feeding switch on the feeding mechanism is turned on, the synchronous belt driving wheel 315, i.e., the small synchronous belt wheel, on the feeding motor 314, i.e., the speed regulating motor, drives the synchronous belt driven wheel 316, i.e., the large synchronous belt wheel and the assembly of the nut 313a to rotate through the synchronous belt. Under the action of the assembly of the large synchronous belt wheel and the nut and the stop block 318, the screw rod 313 moves linearly to push the extrusion piston 311, so that the airtight glue in the barrel 31 is extruded from the outlet 35a of the nozzle 35 onto the non-woven fabric on the 1# sponge roller. When the walking switch of the walking mechanism is turned on, the machine will crawl upward and bring the non-woven fabric with the airtight glue to the wallboard; after the airtight glue and the non-woven fabric are rolled by the 1# and 2# sponge rollers, the non-woven fabric will be attached to the wallboard and the airtight glue will be filled into the gap of the wall.

[0185] When using it for the first time, you need to adjust the speed regulating motor of the feeding mechanism to match the creeping speed of the walking mechanism so that the extruded airtight adhesive can be evenly rolled onto the wide surface of the non-woven fabric.

[0186] When the traveling mechanism starts to climb, it is necessary to press the non-woven fabric head at the bottom of the machine first to prevent the non-woven fabric from being rolled in with the 2# sponge roller when starting to work. After the 2# sponge roller rolls onto the airtight glue and the coating machine rises steadily, release the pressure and it will move automatically. Step 5: When the coating machine reaches the upper end of the board wall, turn off the forward switch of the feeding drive device of the feeding mechanism, turn on the reverse switch, so that the extrusion piston 311 in the barrel 31 retreats, and at the same time turn off the forward switch of the motor in the traveling mechanism, turn on the reverse switch of the motor, and the coating machine moves downward until it is delivered to the ground;

[0187] After the painting machine descends to the ground, remove the material cylinder on the frame 1. That is, only need to loosen the nut on the pull rod 36, and the material cylinder 31 and the extrusion piston 311 inside it can be separated from the push plate 312 and directly removed. Then, sleeve the spare material cylinder filled with glue on the push plate, fix the nut on the pull rod, replace the new cloth feeding reel, move the painting machine to align it with the next board seam, and start the painting operation for the next seam.

[0188] When the machine is working normally, the ground personnel directly fill the replaced material cylinder with airtight glue, or clean the remaining glue in it and then fill it with glue, and install the spare nozzle in place; wind the non-woven fabric on the spare cloth shaft until it is tightly wound; charge the spare power supply.

[0189] After the painting machine returns to the ground again, the material cylinder and the cloth feeding reel can be replaced again. When necessary, the front roller and the rear roller stuck with glue can also be replaced and the battery can be replaced.

[0190] Such as Figure 7a and Figure 7d Show the structures of the air-adjustable fresh-keeping warehouse board 6 and the board seam 65. The surface of the board body of the warehouse board is a color steel plate 61, and the core material is polyurethane 62. The width of the board seam is 3 - 5 mm, and the depth is 5 - 8 mm. To ensure that the painting machine fills the straight part of the board seam with the glue material (the inside turning part of the seam can not be filled with glue), the nozzle 35 of the material cylinder 31 in the feeding mechanism has been confirmed in its designed shape through multiple tests.

[0191] In the feeding mechanism 3, the opening of the nozzle 35 faces downwards corresponding to the front roller 51, and the opening 35c of the nozzle 35 is in the shape of a slit.

[0192] Preferably, the width of the opening is 3 - 8 mm, and the length is 80 mm. Correspondingly, the width of the cloth material is 100 mm. The middle of the slit of the opening 35b is wider, and both sides are narrower. The wider part in the middle corresponds to the seam. Specifically, the width in the middle of the slit is 5 - 8 mm, and the width of both sides is 3 - 5 mm. The length of the wider slit section in the middle is 21 - 25 mm. More specifically, grids are arranged in the width direction of the slit of the opening, and the two grids divide the opening into three openings in total, namely the middle and both sides.

[0193] The grids can be used as stiffeners to provide the strength and stiffness of the opening. In addition, with such a designed nozzle, the glue can be more easily pressed into the board seam.

[0194] When the piston diameter in the feeding mechanism is 70 mm, and the linear motion mechanism connected to the push plate device is a screw mechanism, where the pitch of the lead screw is 3 mm, the walking speed of the painting machine is 2.4 - 3 m / min; the piston moving speed is 62 - 78 mm / min.

[0195] Considering that it takes time for the glue to enter the gap, if the brushing machine moves too fast or the extrusion piston is pressed in too slowly, the gap will not be filled, and there will be glue-free edges on both sides of the non-woven fabric, and the adhesion will not be firm. If the two parameters differ too much, the glue will be cut off; however, if the extrusion piston is pressed in too fast, the glue will be wasted. In addition, too much glue will flow out, which will affect the bonding effect of the fabric on the board wall. During brushing, the glue only needs to enter the 3-5mm wide board wall gap 65 about 3-5mm deep. It does not need to enter the curved gap. Too much glue will be squeezed out from both sides of the fabric, affecting the brushing quality.

[0196] The glue is allowed to enter the board seam through the nozzle mechanism. During operation, the symmetry center of the machine is opposite to the board seam. The cloth width is 100mm, the glue width is 80mm, the seam width is 3-5mm, but it is relatively deep, 5-8mm (see Figure 7d ), therefore, Figures 4k to 4n In the embodiment shown, the length of the nozzle opening is 80 mm, slightly wider in the middle, and 3-5 mm wide on both sides and 5-8 mm wide in the middle in the length direction.

[0197] The diameter of the sponge roller should be 5-10mm larger than the overall height of the track, and the diameter of the sponge in the middle with a width of 12-20mm should be 2-5mm smaller than the diameter on both sides, so as to ensure a smooth transition; only in this way can the coating be thick in the middle and thin on both sides. Sponge hardness: 36-40°.

[0198] The above design, through the structural design of the nozzle outlet being narrow on both sides and wide in the middle, combined with the roller structure selection, obtains the following coating results: more coating is squeezed into the board seam, the width of the adhesive is equivalent to the board seam, and the squeezing depth is about 3-4mm; the coating is thin on both sides and thick in the middle, about 0.5-1mm on both sides and 1-2mm in the middle. For such adhesive seams, when the wallboard vibrates or slightly moves, the tension in the middle of the coating is the greatest, and the design of thickening the coating in the middle makes the coating more reasonable.

[0199] Furthermore, in step 4, when the coating machine starts to climb, it is necessary to press the end of the cloth at the bottom of the machine to prevent the cloth from being rolled into the rear roller by the rotation of the following roller when starting to work. After the rear roller rolls and sticks the cloth to the board wall, the pressed cloth can be released and the coating machine can be allowed to move automatically. Using this coating machine, the gaps of the warehouse board can generally be coated once, but manual coating requires two coats.

[0200] Because permanent magnets are used, when an electrical failure occurs, the machine will be firmly attached to the wall panel and there will be no accidents of power failure, demagnetization and falling.

[0201] The cloth material passes through between the material nozzle and the front roller, and then winds around the front roller by 180°. There is no glue on the starting section of the cloth, and this section is the space occupied by the height of the machine. Therefore, at the starting end of the board seam, there is a board seam with a height of about 40 - 50 cm of the space occupied by the machine that needs to be manually brushed with airtight glue.

[0202] The glue is extruded onto the cloth, and the machine moves upward while the cloth remains stationary relative to the machine. The machine continues to move upward, and the glue is brought to the wall through the cloth. The roller coats and squeezes the glue into the board seam through the cloth and compacts it.

[0203] At a position about 5 - 10 cm from the top of the library for a section of the board seam, due to the height limitation of the coating machine, it also needs to be manually brushed with airtight glue.

[0204] The length of the cloth material wound on the cloth feeding reel 41 should be 5 - 10 cm shorter than the length of a vertical seam of a board wall. When this coating machine reaches the ceiling, the 1# roller, that is, the front roller, touches the roof first. If the cloth is not shortened by 5 - 10 cm, at least 1 / 4 of the circumference of the roller is still on the roller, and this part cannot be pasted onto the wall. When the coating machine moves downward and returns, the cloth will be brought down by the reverse rotation of the roller. If a part of the cloth material is shortened, it means that the front roller reaches the ceiling and the cloth is fully spread out. The coating machine will not bring down the cloth when moving downward, and the vertical seam part of the library board near the ceiling needs to be manually brushed and pasted with cloth.

[0205] During the working process, glue liquid will adhere to both the front and rear rollers. The viscosity of the freshly extruded glue liquid is less than that of the glue liquid already adhering to the roller surface. If there is a large amount of residual glue liquid on the roller, it will make the extruded glue liquid easier to adhere to the roller, affecting the roller pressing effect on the cloth material. Therefore, after the coating machine bonds several seams, the spare roller needs to be replaced. The replaced roller is washed with clean water to remove the glue liquid on the sponge roller, and the water is filtered and left for standby. Thus, it can be seen that the front and rear rollers will be frequently disassembled and assembled during use, and the cloth feeding reel also needs to be disassembled and replaced with a spare reel when the cloth on it is used up. The quick disassembly and assembly structure of the aforementioned front roller 51, rear roller 52, and cloth feeding reel 41 can greatly improve the replacement speed and work efficiency. The top shaft structure provided by the present invention is very simple and reliable in use.

[0206] When the coating machine is used up, the cartridge, nozzle, and extrusion piston need to be disassembled. First, the remaining material in the cartridge and nozzle is returned to the airtight glue bucket. Then, it is cleaned with clean water, filtered, and left for standby.

[0207] The painting machine designed in the present invention is a special machine, which is an all-in-one machine that can complete the brushing of airtight glue and the pasting of non-woven fabric on the plate seams of iron wall surfaces at one time, replacing manual brushing of airtight glue and pasting of non-woven fabric to seal the airtight work between the wall panel seams. It automatically travels by electricity, is easy to operate, easy to replace and clean, has a uniform thickness of the brushed airtight glue, and has the function of completing the processes of brushing airtight glue + pasting non-woven fabric at one time.

[0208] The present invention enables the machine to adsorb on the wall panel through the adsorption function of the permanent magnet and the color steel plate. By adjusting the speed of the speed-regulating walking motor and the speed of the speed-regulating feeding motor to make them match, the airtight glue is sent between the non-woven fabric and the color steel plate, and is roll-pressed and compacted by the sponge roller, so that the airtight glue is fully, continuously and solidly bonded to the wall and the non-woven fabric, achieving the sealing of the plate seam gap. Thus, the airtightness of the library body is ensured.

[0209] Due to the use of a permanent magnet in the present invention, in case of an electrical failure, it will firmly adsorb on the color steel plate and will not fall due to power failure. The special machine body described in the present invention refers to a mechanical structure of a machine, and the control part therein can use the control device in the prior art.

[0210] To control the rotation of the motor, various operation modes such as wireless remote control, wired manual control and intelligent remote control can be selected.

[0211] Compared with the existing process, the present invention directly uses the brushing process of airtight glue and non-woven fabric; or the excessive airtight glue + non-woven fabric pasting process can also be used as the first process by this painting machine.

[0212] The special machine of the present invention avoids the risks of high-altitude operation by multiple people, avoids the defect of uneven thickness of the airtight glue brushed by multiple people, reduces the labor intensity and the labor risk. The present invention is applicable to the vertical wall of the color steel plate, solves the problems of low efficiency of manual coating, uneven brushing, standing at a high altitude and poor safety. Compared with the existing operation, 2-3 laborers can be saved.

[0213] The crawlers used in the present invention are synchronously driven by two motors. Compared with using one motor and a set of transmission mechanisms to drive two crawlers, the power is strong and the weight is lighter.

[0214] The present invention uses a secondary crawler, and the secondary crawler mechanism is arranged from the front end to the back of the painting machine, far away from the 0 point, increasing the safety factor. In the painting machine of the present invention, the airtight glue is extruded between the wall surface and the cloth, and the front and rear rollers extrude the cloth, so that the glue extends on the wall surface and enters the plate seam to be compacted, and the effect of double extrusion and compaction is better.

[0215] Using a cloth material combined with an airtight adhesive, the cloth is equivalent to steel bars. If only the adhesive is used, for the treated panel wall, over time during use, cracks will occur in the adhesive due to vibrations, thermal expansion and contraction, etc., which will damage the airtightness of the storage body, thus losing the meaning of a controlled atmosphere storage. Adding the cloth can greatly increase the crack resistance of the airtight adhesive in the gaps.

[0216] Thinner iron sheets have a certain impact on the suction force of permanent magnets. The color steel plate of the panel of the controlled atmosphere fresh storage has a thickness of 0.426 - 0.476 mm. It belongs to a relatively thin iron sheet, with a very small suction force and is not easy to hold the painting machine. However, the special crawler walking mechanism of the painting machine of the present invention designs the main and auxiliary crawler device structures, which can effectively reduce the influence of the plate thickness on the suction force and shorten the total length of the equipment, enabling the painting machine to operate safely on such a panel wall and meeting the very high requirements for the suction force of the panel wall on the magnet.

[0217] If it is used on a panel wall with not very high requirements for suction force, the auxiliary crawler walking mechanism can be not set. At this time, the rear roller can also rotate and roll. The design of the auxiliary synchronous belt mainly serves to enhance the safety of magnetic adsorption, and its setting at the front end (upper part) of the painting machine far from the 0 point can obtain the maximum torque and the best effect.

[0218] If a greater suction force is required, the walking mechanism provided by the present invention can also add a new crawler mechanism outside the existing main crawler mechanism by setting an axial screw hole on the end face of the top shaft on the driven wheel.

Claims

1. An airtight material painting machine for the seams between the wall panels of a controlled atmosphere fresh-keeping storage, characterized in that: It includes a frame, and the mechanisms arranged on the frame include a traveling mechanism, a feeding mechanism, a cloth feeding mechanism, and a rolling mechanism; The traveling mechanism includes a main caterpillar traveling mechanism, which includes two sets of main caterpillar devices and a motor. The motor is fixed on the frame. Each set of the main caterpillar devices includes a driving wheel, a driven wheel, and a main caterpillar that are connected to each other. The driving wheel is connected to the motor, the driven wheel is fixed on the frame through a bearing, and the main caterpillar is respectively sleeved and fixed on the driving wheel and the driven wheel. The two main caterpillars in the two sets of main caterpillar devices are respectively located on both sides of the frame, and a plurality of permanent magnet blocks are fixed on the outer surface of the caterpillar of the main caterpillar; The feeding mechanism includes a material cylinder fixed on the frame. A discharge port is provided at the front end of the material cylinder, and a nozzle is provided on the discharge port. An extrusion piston and a push plate device are arranged in the material cylinder. The extrusion piston divides the material cylinder into two mutually isolated spaces front and back. The front face of the extrusion piston faces the discharge port. The push plate device is located behind the extrusion piston. The push plate device includes a push plate and a transmission mechanism. The push plate is connected to the extrusion piston, and the push plate is connected to the transmission mechanism. The transmission mechanism passes through the rear end cover of the material cylinder and is connected to a feeding driving device, so that the push plate device drives the extrusion piston to move in the material cylinder, and the airtight material in the material cylinder is extruded from the nozzle; The cloth feeding mechanism includes a cloth feeding reel, the two ends of which are rotatably fixed on the frame. The middle of the cloth feeding reel is a cloth winding shaft section, and cloth shaft retaining pieces are fixed at both ends of the cloth winding shaft section; The rolling mechanism includes a front rolling roller and a rear rolling roller. The front rolling roller is rotatably arranged at the front end of the frame, and the side surface of the front rolling roller protrudes outside the front edge of the frame. The nozzle at the front end of the material cylinder in the feeding mechanism is placed above the front rolling roller, so that the airtight material coming out of the nozzle falls on the cloth material placed on the front rolling roller; The rear rolling roller is rotatably arranged on the frame and is located behind the front rolling roller.

2. The painting machine according to claim 1, wherein: The airtight material is the liquid of airtight glue; and / or, The traveling mechanism further includes a secondary caterpillar traveling mechanism, which includes two sets of secondary caterpillar devices. Each set of the secondary caterpillar devices includes a secondary driving wheel, a secondary driven wheel, and a secondary caterpillar. The secondary driving wheel rotates coaxially and synchronously with the driven wheel in the main caterpillar traveling mechanism, and the secondary driven wheel rotates coaxially and synchronously with the rear rolling roller in the rolling mechanism. The secondary caterpillar is fixed on the secondary driving wheel and the secondary driven wheel. The two secondary caterpillars are located inside the two main caterpillars, and a plurality of permanent magnet blocks are also provided on the outer surface of the caterpillar of the secondary caterpillar; The secondary caterpillar is arranged parallel to the main caterpillar; and / or, The cloth feeding reel is arranged on the frame between the front rolling roller and the rear rolling roller in the rolling mechanism; and / or, The cloth feeding reel is a hollow shaft, with a reel center punch provided at each of its two ends. One end of each reel center punch abuts against one end of the hollow shaft, and the other end is sleeved and fixed in a center punch seat in an axially movable manner. The center punch seat is fixed at the position of the cloth feeding reel hole on the vertical plate of the frame. A clamping groove is provided on the reel center punch that passes through the cloth feeding reel hole and is located outside the vertical plate. An axial retaining ring for the shaft is provided in the clamping groove as the axial limit for the reel center punch. A spring is sleeved on the reel center punch. One end of the spring abuts against a flange on the reel center punch, and the other end abuts against the built-in stepped hole of the center punch seat on the inner side surface of the vertical plate; and / or, The front rolling roller is coaxially installed with the driven wheel in the traveling mechanism; and / or, In the rolling mechanism, the rear rolling roller is located in the middle of the painting machine; and / or, In the rolling mechanism, the front rolling roller and the rear rolling roller are sponge rolling rollers; and / or, The frame includes a flat plate, with two opposite vertical plates connected downward at the two side edges of the flat plate respectively. Mounting hole positions are provided on the vertical plates, through which the wheel shafts of the driving wheel and the driven wheel in the main crawler traveling mechanism in the traveling mechanism, the cloth feeding reel in the cloth feeding mechanism, and the rolling roller shaft in the rolling mechanism are all installed on the vertical plates.

3. The painting machine according to claim 1 or 2, characterized in that: There are two motors in the traveling mechanism that operate synchronously, which are arranged on the frame. The output shafts of the two motors are respectively connected to the two driving wheels in the two sets of main crawler devices; and / or, the motor is a speed-regulating motor; and / or, In the feeding mechanism, the connection structure between the extrusion piston in the material cylinder and the push plate device is in the form of a plane contact, that is, the rear surface of the extrusion piston contacts the front surface of the push plate; and / or, There is an inner concave space on the rear surface of the extrusion piston, and the push plate extends into this inner concave space of the extrusion piston and abuts against the bottom surface of the inner concave space; and / or, The diameter of the push plate is 8 - 11 mm smaller than the diameter of the extrusion piston; and / or, In the feeding mechanism, the feeding driving device includes a feeding motor arranged on the frame. The transmission mechanism connected to the push plate is a linear transmission mechanism, which connects the feeding driving device; and / or, In the feeding mechanism, the connection structure between the material cylinder and the nozzle is: the nozzle is hermetically sleeved on the discharge port of the material cylinder, and the nozzle is pressed tightly on the discharge port through a pressurized sealing device; and / or, In the feeding mechanism, the opening of the nozzle faces downward corresponding to the front rolling roller, and the opening of the nozzle is in the shape of a slit; and / or, The cloth feeding mechanism further includes a cloth pressing elastic piece, one end of which is fixed on the frame, and the other end corresponds to the cloth winding shaft section, so that the cloth unrolled from the cloth feeding reel is flat without accumulation and will not be loose and disorderly during use; and / or, In the rolling mechanism, the front rolling roller is coaxially installed with the driven wheel in the traveling mechanism.

4. The painting machine according to claim 1, characterized in that: The walking mechanism further includes a secondary crawler walking mechanism, which includes two sets of secondary crawler devices. Each set of the secondary crawler devices includes a secondary driving wheel, a secondary driven wheel and a secondary crawler. When the secondary crawler walking mechanism is provided, in the roller pressing mechanism, the front roller is coaxially installed with the driven wheel in the walking mechanism and the secondary driving wheel in the secondary crawler walking mechanism; the rear roller is coaxially installed with the secondary driven wheel in the secondary crawler walking mechanism in the walking mechanism.

5. The painting machine according to claim 1 or 2, characterized in that: The material of the permanent magnet blocks provided on the outer surface of the crawler of the main crawler or the secondary crawler is at least one of N48-N52; and / or, The permanent magnet blocks are cylindrical, with an outer diameter of 5 mm - 15 mm and a thickness of 2.5 - 5 mm. A bolt hole is provided on the axis of the cylindrical permanent magnet block, and a counterbore is provided on the end face facing outward, so that the permanent magnet block is fixed to the crawler of the main crawler or the secondary crawler by bolts; and / or, The distance between adjacent permanent magnet blocks is: in the length direction of the crawler, the center distance between the front and rear adjacent permanent magnet blocks is 12 - 18 mm, and in the width direction of the crawler, the center distance between the left and right adjacent permanent magnet blocks is 11 - 17 mm.

6. The painting machine according to claim 2, wherein: When the secondary crawler walking mechanism is provided, the main crawler and the secondary crawler in the walking mechanism are respectively placed outside and inside the vertical plate connected to the flat plate in the frame.

7. The coating machine according to claim 1 or 2, characterized in that: The bolts for fixing the permanent magnet blocks are M3×6 mm bolts.

8. The painting machine according to claim 3, characterized in that: In the transmission mechanism connected to the push plate, the linear transmission mechanism is a screw mechanism. The rear end cover of the barrel serves as a barrel bearing seat. The screw mechanism includes a screw rod and a nut meshing on the screw rod, which is fixed on the barrel bearing seat. One end of the screw rod is connected to the push plate, and the other end passes through the barrel bearing seat and meshes with the nut supported on the barrel bearing seat. The nut is connected to the feeding motor, and an anti-rotation structure is provided between the screw rod and the barrel bearing seat; and / or, The feeding motor in the feeding drive device is a speed regulating motor; and / or, The pressure sealing device includes a nozzle pressing ring provided on the nozzle, and also includes a nut member and a pull rod. The nozzle pressing ring seals and presses the nozzle on the discharge port of the barrel. At least two bolt holes are evenly distributed on the outer edge of the nozzle pressing ring, and corresponding bolt holes are also provided on the rear end cover of the barrel. Both ends of the pull rod pass through the bolt holes on the rear end cover and the nozzle pressing ring respectively, and are respectively connected by two nut members to adjust the pressing force of the nozzle pressing ring; and / or, In the nozzle in the feeding mechanism, the width of the opening of the nozzle is 3 - 10 mm, and the length is 70 - 80 mm; and / or, One end of the cloth pressing spring piece in the cloth feeding mechanism, which is fixed to the frame, is fixed on the lower bottom surface of the flat plate in the frame.

9. The painting machine according to claim 1, characterized in that: When there is only the main crawler walking mechanism, The front rolling roll is arranged on a hollow shaft, and at both ends of the hollow shaft, a front rolling roll top shaft is abutted respectively. The other end of each front rolling roll top shaft sequentially passes through a rolling roll center pin sleeve, the mounting hole position of the vertical plate of the frame and the center hole of the driven wheel and is limited by a shaft retaining ring. A spring is sleeved on the front rolling roll top shaft. One end of the spring abuts against the shoulder on the center hole of the rolling roll center pin sleeve, and the other end abuts against the side surface of the flange on the front rolling roll top shaft, forming a quick disassembly structure; the rolling roll center pin sleeve and the driven wheel are arranged on the vertical plate through a bearing device arranged at the mounting hole position on the vertical plate; The rear rolling roll is also arranged on a hollow shaft, and at both ends of the hollow shaft, a rear rolling roll top shaft is abutted respectively. The other end of each rear rolling roll top shaft sequentially passes through a rolling roll center pin sleeve, the mounting hole position of the vertical plate of the frame and a shaft stopper and is limited by a shaft retaining ring. A spring is sleeved on the rear rolling roll top shaft. One end of the spring abuts against the shoulder on the center hole of the rolling roll center pin sleeve, and the other end abuts against the side surface of the flange on the rear rolling roll top shaft, forming a quick disassembly structure; the rolling roll center pin sleeve and the rear rolling roll top shaft are arranged on the vertical plate through a bearing device arranged at the mounting hole position on the vertical plate.

10. The painting machine according to claim 2, wherein: When a secondary crawler traveling mechanism is provided: The front rolling roll is arranged on a hollow shaft, and at both ends of the hollow shaft, one end of a front rolling roll top shaft is abutted respectively. The other end of each front rolling roll top shaft passes through the center hole of the secondary driving wheel, the mounting hole position of the vertical plate of the frame and the center hole of the driven wheel and is limited by a shaft retaining ring. A spring is sleeved on the front rolling roll top shaft. One end of the spring abuts against the step surface of the center hole of the secondary driving wheel, and the other end abuts against the side surface of the flange on the front rolling roll top shaft, forming a quick disassembly structure; the driven wheel and the secondary driving wheel are arranged on the vertical plate through a bearing device arranged at the mounting hole position on the vertical plate; The rear rolling roll is also arranged on a hollow shaft, and at both ends of the hollow shaft, one end of a rear rolling roll top shaft is abutted respectively. The other end of each rear rolling roll top shaft passes through the center hole of the secondary driven wheel, the mounting hole position of the vertical plate of the frame and the center hole of a shaft stopper and is limited by a shaft retaining ring. A spring is sleeved on the rear rolling roll top shaft. One end of the spring abuts against the step surface of the center hole of the secondary driven wheel, and the other end abuts against the side surface of the flange on the rear rolling roll top shaft, forming a quick disassembly structure; the secondary driven wheel and the shaft stopper are arranged on the vertical plate through a bearing device arranged at the mounting hole position on the vertical plate.

11. The coating machine according to claim 1 or 2, characterized in that: The diameters of the front rolling roll and the rear rolling roll should be 5 - 10 mm larger than the overall height of the crawler.

12. The painting machine according to claim 2, characterized in that: For the front rolling roll and the rear rolling roll, the sponge rolling roll therein is thinner in the middle and thicker at both ends, and the thinner middle section and the thicker end section are smoothly transitioned; and / or, The sponge hardness on the front rolling roll and the rear rolling roll is 36 - 40°.

13. The painting machine according to claim 8, characterized in that: In the feeding mechanism, the connection structure between the feeding motor and the nut is provided with a synchronous belt mechanism therebetween, wherein the main synchronous belt pulley is fixed on the output shaft of the feeding motor, the slave synchronous belt pulley and the nut form an integral component, and the feeding motor drives the nut to rotate through the synchronous belt sleeved on the main synchronous belt pulley and the slave synchronous belt pulley, so that the lead screw makes a linear motion under the meshing action of the anti-rotation structure and the nut to drive the extrusion piston to act; and / or, In the nozzle of the feeding mechanism, the slit of the opening of the nozzle is wider in the middle and narrower at both sides.

14. The painting machine according to claim 12, characterized in that: On the front roller and the rear roller, the axial length of the thinner middle section of the sponge roller is 12 - 20 mm; and / or, On the front roller and the rear roller, the diameter of the middle section of the sponge roller is 2 - 5 mm smaller than the diameters of the two end sections.

15. The painting machine according to claim 11, wherein: For the opening of the nozzle, the length of the wider slit section in the middle is 21 - 25 mm; and / or, The width in the middle of the opening of the nozzle is 5 - 8 mm, and the widths at both sides are 3 - 5 mm; and / or, The opening of the nozzle is provided with a grille in the width direction, and the two grilles divide the opening into a middle section and two side sections.

16. The method for painting the airtight material between the seams of the wall panels of the controlled atmosphere fresh-keeping storage using the painting machine according to any one of claims 1 to 15 is as follows: Step 1: Install the barrel of the feeding mechanism filled with the airtight material on the frame. Step 2: Install the cloth feeding reel with the cloth material wound between the two cloth shaft stoppers on the frame, and pass the end of the cloth material through between the nozzle of the barrel and the front roller, place the cloth material on the front roller, and let the end of the cloth material hang down naturally and extend a section below the bottom of the painting machine. Step 3: Adjust the position of the painting machine, place it on the ground or on the kicker at the lower part of the wall panel and align the center line of the cloth material with the seam, and adsorb the front end of the crawler-type traveling mechanism of the painting machine to the wall of the color steel plate. Step 4: Start the forward switch of the feeding drive device in the feeding mechanism, and when the airtight material is extruded onto the cloth material, start the forward switch of the motor of the traveling mechanism, and the painting machine climbs upward along the wall. Under the action of the front roller and the rear roller, the airtight material is painted on the wall and pressed into the seam, and the cloth material adheres to the wall until the painting machine reaches the top of the wall. Step 5: Turn off the forward switch of the feeding drive device of the feeding mechanism, turn on the reverse switch, so that the push plate device connected to the extrusion piston in the barrel retracts, and at the same time turn off the forward switch of the motor in the traveling mechanism and turn on the reverse switch of this motor to send the painting machine to the ground. Align the painting machine with the next seam and repeat the above steps 1 - 5 to perform the painting operation.

17. The method according to claim 16, wherein: In step 4, when the painting machine starts to climb, it is necessary to first press the end of the cloth material at the bottom of the machine to prevent the cloth material from being rolled into the rear roller as the rear roller rotates at the beginning of work. After the rear roller rolls and presses the cloth material to adhere to the wall, the pressing can be released and the painting machine can be allowed to walk automatically; and / or, After painting at least two seams, replace the front roller and / or the rear roller.

18. The method according to claim 16, characterized in that: The traveling speed of the painting machine: 2.4 - 3 m / min; the piston moving speed: 62 - 78 mm / min; and / or, The length of the cloth material wound on the cloth feeding reel is 5 - 10 cm shorter than the length of a vertical seam of a wall panel, so that when the painting machine reaches the ceiling, the front roller contacts the roof first. At this time, all the cloth material on the cloth feeding reel is spread out and attached to the wall surface, and the vertical seam part of the storage board near the ceiling that is left empty needs to be manually painted and patched with cloth.

19. The method according to claim 18, characterized in that: The diameter of the extrusion piston in the feeding mechanism: 65 - 75 mm, and the linear motion mechanism connected to the push plate device is a screw mechanism, where the pitch of the screw rod: 2.5 - 4 mm.

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