A method for coating the corner tank of a membrane type liquid cargo containment system with epoxy resin

Abstract

The application discloses a kind of film type liquid cargo containment system corner box epoxy resin coating method, utilize epoxy resin manual coating device to carry out manual coating operation to corner box, the present application is added roller assembly in front end of epoxy resin manual coating device, effectively reduce the labor intensity of operator, it is convenient to adjust coating angle simultaneously, ensure that corner box corner angle strip forming, avoid strip damage, improve coating uniformity;The present application adopts pneumatic drive technology, can adapt to large flow, high viscosity epoxy resin material, improve operation convenience;At the same time, by designing large-capacity storage tank, reduce the frequent start of assembly line, reduce production cost, and because storage tank body selects aluminum alloy material, can effectively reduce the weight of device, reduce transportation risk, it is convenient for on-site operation;In addition, the present application is equipped with heating unit and reversible temperature measuring paper, can quickly reduce material viscosity, prolong service life, ensure coating quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of LNG liquid cargo containment system construction, and particularly relates to a method for coating epoxy resin of a corner tank of a membrane type liquid cargo containment system. BACKGROUND

[0002] The LNG liquid cargo containment system, especially the membrane type liquid cargo containment system, has a very high requirement for the flatness of the liquid cargo tank. The liquid cargo containment system mainly consists of primary and secondary layer insulation tanks and primary and secondary layer invar steel, which can isolate liquid natural gas, avoid its absorption of heat from the outside of the cargo tank, simultaneously transmit the pressure of the liquid natural gas to the cargo tank, and ensure that the liquid natural gas cannot leak. The transmission of the pressure of the liquid natural gas is mainly realized through the epoxy resin adhesive tape coated on the secondary layer insulation tank according to the design trajectory and type. At present, the epoxy resin coating production line is often used to complete the coating work of the epoxy resin adhesive tape for the large space liquid cargo containment system of the LNG transport ship and the like. However, the equipment has a large size and is usually fixedly arranged on the third layer full-paved layer in the construction stage. The equipment often has the following problems:

[0003] 1. The equipment uses automatic means and has a very high production efficiency when coating the batch standard tank type, but cannot show its superior performance when facing the coating of small batch non-standard tanks, and the frequent start and stop greatly reduces the service life of the sealing components in the adhesive supply system;

[0004] 2. When producing in special areas such as chord side process holes and liquid domes, the liquid cargo containment system is in the final stage, the equipment is often transported out of the tank, and the coating of the epoxy resin needs long-distance transportation, which not only reduces the response speed, but also greatly affects the temperature and humidity of the epoxy resin adhesive tape in the transportation process due to external environmental factors, and there is a quality risk.

[0005] Through retrieval, the Chinese invention file with the present publication number CN107051837B discloses a direct current pneumatic glue gun convenient to use, which "includes a shell and a glue pipe sleeve for installing a glue pipe, the rear end of the glue pipe sleeve is sealingly fixed with the front end of the shell, and the shell is fixedly provided with a gas pump, a gas pump switch, a pressure relief valve and a direct current power supply, the gas pump switch is electrically connected with the direct current power supply and the gas pump, the gas pump, the pressure relief valve and the glue pipe sleeve are in communication through a gas pipe, a button is hinged on the shell, and the button controls the pressure relief valve and the gas pump switch", although it is convenient to use, but the glue viscosity handled by the above glue gun is low, compared with it, the glue material involved in the present application is high-viscosity epoxy resin, and the maximum viscosity of the epoxy resin exceeds 1800000 mPa.s, and the conventional glue gun on the market cannot meet the demand of the whole coating of the epoxy resin adhesive tape due to the small capacity, resulting in low coating efficiency. The main difference between the present application and the many pneumatic glue guns in the prior art lies in the following two aspects:

[0006] 1. Application field difference: In order to uniformly transmit the force generated by the sloshing of liquid natural gas during LNG transportation to the ship hull, an epoxy resin mixed material needs to be used in the LNG liquid cargo containment system. The material has extremely high viscosity at room temperature, and the viscosity significantly decreases when heated. The material can be cured after a period of time at room temperature, and has high hardness. Therefore, the application specially designs a heating function to improve the flowability during coating. In addition, the application is also provided with a temperature display to realize intuitive observation and control of the heating temperature, which can effectively avoid the risk of changing the performance of the mixed material due to heating to a too high temperature.

[0007] 2. Special nature of application environment: During the construction of the LNG liquid cargo containment system, there is a requirement for coating the entire resin, and the epoxy resin adhesive strip has specific cross-sectional area requirements. According to the C3 type adhesive strip technology, the volume of a single resin adhesive is about 500 ml. In order to meet this demand, the application adopts a pneumatic form and a detachable manner, which simplifies the structure of the device, saves costs, and reduces the volume of the entire device, making it more suitable for large-capacity and high-viscosity epoxy resin coating operations. The current market supply gun is mainly used for small-capacity and low-viscosity occasions. The purpose of the application is to fill this gap in the subdivided application field.

[0008] Through these innovative designs, the application not only improves the coating efficiency of the epoxy resin adhesive strip, but also ensures the flowability of the material during coating and the quality of the final curing, meeting the specific requirements of the epoxy resin coating during the construction of the LNG liquid cargo containment system. SUMMARY

[0009] To solve the problems in the prior art described above, the purpose of the present application is to provide a coating method for epoxy resin of a corner tank of a thin film type liquid cargo containment system, which improves the coating efficiency of the epoxy resin adhesive strip, realizes efficient manual coating of the epoxy resin adhesive strip in the finishing stage of the liquid cargo containment system, reduces production costs and transportation risks, and ensures the quality and safety of the coating operation.

[0010] To achieve the above-mentioned purposes and other related purposes, the present application adopts the following technical solutions:

[0011] The present application provides a coating method for epoxy resin of a corner tank of a thin film type liquid cargo containment system, which uses a manual epoxy resin coating device to perform manual coating operation on the corner tank.

[0012] The epoxy resin manual coating device comprises a device body, a storage tank body, a coating nozzle and a roller assembly; the roller assembly comprises two auxiliary wheels connected by a connecting shaft, and a clamp is arranged on the connecting shaft; the roller assembly is fixed to the front end of the epoxy resin manual coating device by the clamp; the device body is detachably provided with the storage tank body; the storage tank body is a hollow pipe with a cavity for filling epoxy resin mixed material; the rear end of the storage tank body is provided with a feeding port; the coating nozzle comprises a glue outlet and a connecting seat; the front end of the glue outlet is provided with a U-shaped opening; the coating nozzle is detachably installed on the front end of the storage tank body through the connecting seat.

[0013] The device body comprises a support unit, a driving unit, a temperature control unit and an external pipeline; the external pipeline comprises a compressed air pipe and an electric wire for providing compressed air and power supply; the support unit is used for providing fixed support for the storage tank body and comprises a handle for providing a holding point; the driving unit comprises a driving chamber, a driving switch and a driving piston; the driving piston is arranged at the front end of the driving chamber and is installed in the storage tank body through the feeding port; the driving chamber is controlled to be started and compressed air by the driving switch, thereby pushing the driving piston to move forward along the central axis of the storage tank body in the storage tank body; the temperature control unit comprises a manual switch, a heating unit and reversible temperature measuring paper; the manual switch is arranged on the side of the driving chamber and is used for controlling the power supply of the external pipeline; the heating unit is fixedly attached to the inner wall of the support unit and is used for wrapping the outer wall of the storage tank body and heating; the heating unit comprises a heating pad and a temperature control switch; the temperature control switch is used for controlling the heating of the heating pad; the reversible temperature measuring paper is arranged on the outer wall of the coating nozzle and is provided with a temperature display bar for monitoring the heating temperature.

[0014] The coating method comprises the following steps:

[0015] S1, the coating nozzle is installed at the front end of the storage tank body;

[0016] S2, the storage tank body is filled with epoxy resin mixed material through the feeding port;

[0017] S3, the feeding port of the storage tank body is blocked by the driving piston, then the storage tank body is installed on the device body, and the direction of the U-shaped opening of the coating nozzle is adjusted to be parallel to the central axis of the handle;

[0018] S4, the device is carried to the construction site, after the power supply is connected, the epoxy resin mixed material in the storage tank body is heated by the heating unit, and the temperature is observed by the reverse temperature measuring paper; when the temperature display reaches the ideal temperature, the heating is stopped;

[0019] S5, the front end of the epoxy resin manual coating device is sleeved with a roller assembly, and installation of the device is completed;

[0020] S6, a coating line is drawn on the position where the epoxy resin needs to be coated on the corner box;

[0021] S7, the epoxy resin manual coating device is placed, the roller assembly is abutted on the upper surface of the corner box, the glue outlet is aligned with the position to be coated, the angle of the U-shaped opening of the coating nozzle is adjusted, the center line of the U-shaped opening of the coating nozzle is coincided with the coating line;

[0022] S8, the driving switch is pressed, the manual coating operation is performed, when the epoxy resin mixed material in the storage tank is used up, the storage tank is removed from the device body, the coating nozzle is unscrewed, the driving piston is taken out, and steps S1-S8 are repeated until the coating line of the corner box is coated with the epoxy resin mixed material, and the manual coating operation is completed.

[0023] As a preferred technical solution, the roller assembly comprises two auxiliary wheels, the two auxiliary wheels are movably connected through a connecting shaft, so that the two auxiliary wheels can rotate synchronously along the axis of the connecting shaft, a hoop is arranged above the central position of the connecting shaft, the hoop has an inner diameter matched with the front end of the epoxy resin manual coating device, so that the roller assembly can be sleeved and fixed on the front end of the epoxy resin manual coating device.

[0024] As a preferred technical solution, the support unit comprises a front end cover, a lower support and a handle, the handle comprises a front handle and a rear handle; the front handle is welded and fixed to the lower support near the front end, and the driving chamber is welded and fixed to the rear end of the lower support; the driving switch and the rear handle are welded and fixed to the driving chamber from front to back in sequence, the center lines of the driving switch, the front handle and the rear handle are located on the same plane, the rear handle is a hollow structure, and the external pipeline is connected to the driving chamber through the rear handle.

[0025] As a preferred technical solution, the front end of the lower support is welded with the front end cover, and a middle hole is formed in the middle of the front end cover; the U-shaped opening is communicated to the inside of the storage tank through the middle hole on the front end cover; the storage tank is detachably installed in the lower support, and the two ends of the storage tank are respectively abutted and fixed between the front end cover and the driving chamber.

[0026] As a preferred technical solution, the front end of the driving piston is a conical platform, the rear part of the driving piston is a cylinder, the outer diameter of the cylinder is slightly smaller than the inner wall of the storage tank, and a first recess is arranged on the cylinder, and a first sealing assembly is arranged on the first recess.

[0027] As a preferred technical scheme, the front end of the storage tank body is provided with a second groove, the second groove is provided with a second sealing assembly, and the rear part of the second groove is provided with an external thread; the connecting seat of the coating nozzle is provided with an internal thread matched with the external thread of the rear part of the second groove, and the coating nozzle is detachably installed at the front end of the storage tank body through the thread.

[0028] As a preferred technical scheme, in the step S2, the storage tank body is filled by using an epoxy resin glue filling machine: the material feeding port at the rear end of the storage tank body is placed at the mixing and discharging port of the epoxy resin glue filling machine, the epoxy resin glue filling machine is started, the discharging time is set according to the capacity of the storage tank body, until the storage tank body is filled with the epoxy resin mixed material, the epoxy resin glue filling machine is closed, and the storage tank body filled with the epoxy resin mixed material is taken out.

[0029] As a preferred technical scheme, the driving chamber is further provided with a spring;

[0030] In the step of installing the storage tank body on the device body in the step S3, the rear end of the storage tank body is first inserted into the driving chamber, force is applied to compress the spring, then the front end of the connecting seat of the coating nozzle is placed into the lower support, and the force is released to reset the spring, so that the front end surface of the connecting seat of the coating nozzle is tightly abutted against the rear end surface of the front end cover.

[0031] As a preferred technical scheme, the support unit further comprises a locking mechanism, one end of the locking mechanism is hinged to one side of the upper end surface of the lower support, the other end of the locking mechanism is locked and fixed to the other side of the upper end surface of the lower support through a bolt assembly, and the inner side surface of the locking mechanism has a shape matched with the outer wall of the storage tank body;

[0032] In the step of installing the storage tank body on the device body in the step S3, the storage tank body is placed in the lower support, and then the storage tank body is locked and fixed in the lower support through the locking mechanism.

[0033] As a further preferred technical scheme, in the step S8, after the manual coating operation is completed, if there is still residual epoxy resin mixed material in the storage tank body, the storage tank body is emptied in time, the storage tank body is taken out from the device body and the coating nozzle is removed, and the driving piston is taken out for standby.

[0034] As described above, the present application has the following beneficial effects:

[0035] (1) The coating method of the epoxy resin of the corner tank of the thin film type liquid cargo containment system, by installing the roller assembly at the front end of the epoxy resin manual coating device, the auxiliary support function can be played, without holding the end to control, effectively reducing the labor load of the operator, at the same time, through the fulcrum provided by the roller assembly, the angle between the epoxy resin manual coating device and the surface of the corner tank can be adjusted, so as to effectively control the height of the coating nozzle at the gun head of the epoxy resin manual coating device, especially the corner tank corner position, the epoxy resin strip can be effectively guaranteed through the roller assembly; In addition, since the adhesive strip is located behind the forward direction of the auxiliary roller, and the trajectory of the epoxy resin adhesive strip is basically straight, the epoxy resin adhesive strip will not be damaged, the damage of the adhesive strip caused by the unstable holding of the operator can be effectively avoided, and the sealing performance and uniformity of the epoxy resin coating on the surface of the corner tank of the LNG ship are ensured.

[0036] (2) The coating method of the epoxy resin of the corner tank of the thin film type liquid cargo containment system, aiming at the limitation of the conventional manual glue gun when facing the large flow and high viscosity of the epoxy resin mixed material, the pneumatic driving technology is adopted, so that the whole component is small and easy to operate, and the coating demand of the high viscosity material in production is met.

[0037] (3) The coating method of the epoxy resin of the corner tank of the thin film type liquid cargo containment system, a large-capacity storage tank is designed, by designing the size of the storage tank body as the inner diameter is greater than 32mm, the length is more than 400mm, the overall capacity of the storage tank body is greater than 1L, which can meet the coating requirement of multiple epoxy resin adhesive strips at a time, and this design effectively reduces the frequent start of the epoxy resin coating assembly line, thereby reducing the high production cost caused by frequent start.

[0038] (4) The coating method of the epoxy resin of the corner tank of the thin film type liquid cargo containment system, the epoxy resin mixed material can be quickly heated through the heating unit, the viscosity of the material is effectively reduced, the coating smoothness is improved, and the service life of the device is prolonged; In addition, reversible temperature measuring paper is adopted on the device, so that the temperature change is obvious at a glance, the operator can monitor the temperature state of the material in real time, and the coating quality is ensured.

[0039] (5) The coating method of the epoxy resin of the corner tank of the thin film type liquid cargo containment system, aluminum alloy material is adopted, which is light in quality and convenient for the operator to coat on site, which greatly reduces the uncontrollable risk that may occur in the transportation process after the epoxy resin adhesive strip is coated. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 It is the structure diagram of the device body in the application.

[0041] Figure 2 is a structural schematic diagram of the storage tank body in the present application.

[0042] Figure 3 is a sectional view of the storage tank body, the coating nozzle and the driving piston in the present application.

[0043] Figure 4 is a sectional view of the heating unit in the present application.

[0044] Figure 5 is a structural schematic diagram of the heating pad in the present application.

[0045] Figure 6 is a whole installation schematic diagram when the roller assembly is hidden in the present application.

[0046] Figure 7 is a structural schematic diagram when the roller assembly is installed at the front end of the device in the present application.

[0047] Specifically, the reference signs are described as follows: 11, support unit; 111, front end cover; 112, lower support; 113, locking mechanism; 114, front handle; 115, rear handle; 12, driving unit; 121, driving chamber; 122, driving switch; 123, driving piston; 1231, first groove; 1232, first sealing assembly; 13, temperature control unit; 131, manual switch; 132, heating unit; 1321, heating pad; 1322, temperature control switch; 1323, sponge; 133, reversible temperature measuring paper; 14, external pipeline; 2, storage tank body; 21, second groove; 22, second sealing assembly; 23, external thread; 3, coating nozzle; 31, glue outlet; 32, connecting seat; 4, roller assembly; 41, auxiliary wheel; 42, connecting shaft; 43, clamp. DETAILED DESCRIPTION

[0048] In order to better understand the purpose, structure and function of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0049] In the description of the present application, it should be noted that the position relationship indicated in the present specification, such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the position relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular direction, and therefore cannot be understood as a limitation of the present application. Embodiment 1

[0050] As Figures 1-7 The present embodiment provides an epoxy resin manual coating device for a coating method of an epoxy resin of a corner tank of a thin-film liquid cargo containment system, so as to realize manual coating work of the corner tank.

[0051] The epoxy resin manual coating device comprises a device body, a storage tank body 2, a coating nozzle 3 and a roller assembly 4; the coating nozzle 3 is detachably installed at the front end of the storage tank body 2, and the storage tank body 2 is detachably installed on the device body; the roller assembly 4 comprises two auxiliary wheels 41 connected through a connecting shaft 42, and a clamp 43 is arranged on the connecting shaft 42; the roller assembly 4 is fixed on the front end of the epoxy resin manual coating device through the clamp 43; specifically, the roller assembly 4 comprises two auxiliary wheels 41, and the two auxiliary wheels 41 are movably connected through the connecting shaft 42, so that the two auxiliary wheels 41 can synchronously rotate along the axis of the connecting shaft 42; a clamp 43 is arranged above the central position of the connecting shaft 42, and the clamp 43 has an inner diameter matched with the front end of the epoxy resin manual coating device, so that the roller assembly 4 can be fixed on the front end of the epoxy resin manual coating device; in the present embodiment, the roller assembly 4 is fixed on the front end of the coating nozzle 3 through the clamp 43, and is suitable for manual coating in a narrow position; in other embodiments, the roller assembly 4 is fixed on the front end of the device body through the clamp 43, and is suitable for a situation where a large amount of coating is required, so as to provide greater support.

[0052] The device body comprises a support unit 11, a driving unit 12, a temperature control unit 13 and an external pipeline 14. The support unit 11 is used to provide fixed support for the storage tank body 2 and provide a holding point during gluing. The support unit 11 comprises a front end cover 111, a lower support 112, a locking mechanism 113 and a handle, the handle comprising a front handle 114 and a rear handle 115. The driving unit 12 comprises a driving chamber 121, a driving switch 122 and a driving piston 123. The front end of the lower support 112 is welded with the front end cover 111, and a middle hole is formed in the middle of the front end cover 111. In this embodiment, the support unit 11 further comprises a plurality of locking mechanisms 113, which are arranged on the lower support 112. One end of the locking mechanism 113 is hinged to one side of the upper end surface of the lower support 112, and the other end of the locking mechanism 113 is locked and fixed to the other side of the upper end surface of the lower support 112 through a bolt assembly. The inner side of the locking mechanism 113 has a shape matching the outer wall of the storage tank body 2. The storage tank body 2 can be further locked and fixed by the locking mechanism 113 to prevent the angle of the coating nozzle 3 from changing due to displacement of the storage tank body 2. The front handle 114 is welded and fixed to the lower part of the lower support 112 near the front end, and the driving chamber 121 is welded and fixed to the rear end of the lower support 112. The driving switch 122 and the rear handle 115 are welded and fixed to the driving chamber 121 from front to back. The center lines of the driving switch 122, the front handle 114 and the rear handle 115 are located on the same plane. The rear handle 115 is a hollow structure. The external pipeline 14 is connected to the driving chamber 121 through the rear handle 115. The external pipeline 14 comprises a compressed air pipe and an electric wire, which are used to provide compressed air and power supply. The driving piston 123 is arranged at the front end of the driving chamber 121 and can be separated from the driving chamber 121. The front end of the driving piston 123 is a conical platform, and the rear part of the driving piston 123 is a cylinder. The outer diameter of the cylinder is slightly smaller than the inner wall of the storage tank body 2, and a first recess 1231 is arranged on the cylinder. A first sealing assembly 1232 is arranged on the first recess 1231, which is used to prevent the leakage of the epoxy resin mixture in the storage tank body 2 and ensure the sealing of the rear part of the driving piston 123, thereby providing the condition for air compression. During operation, the driving chamber 121 is controlled and started by the driving switch 122 to compress air, which in turn pushes the driving piston 123 to move forward along the central axis of the storage tank body 2 in the storage tank body 2. By using pneumatic driving, the overall component volume of the device can be reduced, which is small, light and easy to carry and control during coating operation. The temperature control unit 13 comprises a manual switch 131, a heating unit 132 and reversible temperature measurement paper 133. The manual switch 131 is arranged on the side of the driving chamber 121, which is used to control the power supply of the external pipeline 14.The heating unit 132 is adhered and fixed to the inner wall of the support unit 11, and is used to cover the outer wall of the storage tank body 2 and perform heating. Specifically, the heating unit 132 is distributed on the inner wall of the lower support 112 and the inner wall of the locking mechanism 113, and the outer side of the heating unit 132 in contact with the inner wall of the lower support 112 and the locking mechanism 113 is adhered and fixed to the lower support 112 and the locking mechanism 113, respectively, so that when the storage tank body 2 is installed in the support unit 11 and the locking mechanism 113 is buckled, the outer wall of the storage tank body 2 can be completely covered in the inner side of the heating unit 132; the heating unit 132 comprises a heating pad 1321, a temperature control switch 1322 and a sponge 1323, the inner and outer sides of the heating pad 1321 are provided with the sponge 1323, the sponge 1323 is used to protect the heating pad 1321, and can also better fit the outer wall of the storage tank body 2 to provide balanced heating, and the temperature control switch 1322 is used to control the heating of the heating pad 1321; through the heating unit 132, the epoxy resin mixed material in the storage tank body 2 can be quickly heated, the material viscosity can be reduced, the flowability during coating can be improved, and the service life of the device can be prolonged; the reversible temperature measuring paper 133 is arranged on the outer wall of the coating nozzle 3, and the reversible temperature measuring paper 133 is provided with a temperature display strip; by using the reversible temperature measuring paper 133, the temperature change can be seen at a glance, the heating temperature before glue output can be observed and controlled in real time and intuitively through the temperature display strip on the reversible temperature measuring paper 133, whether the epoxy resin mixed material in the storage tank body 2 reaches the ideal temperature suitable for glue coating can be monitored, and in the embodiment, the ideal temperature for glue coating is set to 30℃.

[0053] The storage tank body 2 is detachably installed in the lower support 112, and the two ends of the storage tank body 2 are respectively abutted and fixed between the front end cover 111 and the driving chamber 121; the storage tank body 2 is a hollow tube with a cavity, and the cavity is used to fill epoxy resin mixed material; in this embodiment, the storage tank body 2 is made of aluminum alloy material, which is light in weight and convenient to use; the inner diameter of the storage tank body 2 is greater than 32 mm, the length is more than 400 mm, and the overall capacity is greater than 1 L, which can meet the one-time coating requirements of multiple epoxy resin adhesive strips; the front end of the storage tank body 2 is provided with a second groove 21, the second groove 21 is provided with a second sealing assembly 22, and the rear part of the second groove 21 is provided with an external thread 23; the coating nozzle 3 includes a glue outlet 31 and a connecting seat 32, the connecting seat 32 is provided with an internal thread, the internal thread is matched with the external thread 23 at the rear part of the second groove 21, and the coating nozzle 3 is detachably installed at the front end of the storage tank body 2 through the thread; the front end of the glue outlet 31 is provided with a U-shaped opening, and the U-shaped opening is communicated to the inside of the storage tank body 2 through the middle hole on the front end cover 111; the rear end of the storage tank body 2 is provided with a feeding port, the driving piston 123 is installed in the storage tank body 2 through the feeding port, and can move to the front end along the central axis of the storage tank body 2. In this embodiment, the driving chamber 121 is also provided with a spring, and the storage tank body 2 after installation can be applied with a forward thrust by the spring, so as to achieve the purpose of stably fixing the storage tank body 2. In work, first, the rear end of the storage tank body 2 is inserted into the driving chamber 121, the force is applied to compress the spring, then the front end of the storage tank body 2 is put into the lower support 112, the applied force is released to reset the spring, so that the front end surface of the connecting seat 32 of the coating nozzle 3 is tightly abutted with the rear end surface of the front end cover 111. Embodiment 2

[0054] As shown in Figure 6 and Figure 7 The embodiment provides a coating method of epoxy resin of a corner box of a thin film type liquid cargo containment system by using the device of embodiment 1, which comprises the following steps:

[0055] S1, the coating nozzle 3 is screwed and installed at the front end of the storage tank body 2.

[0056] S2, the inside of the storage tank body 2 is filled with epoxy resin mixed material through the feeding port at the rear end of the storage tank body 2; in this embodiment, the epoxy resin coating machine filled with epoxy resin mixed material is used to fill the storage tank body 2. Specifically, the feeding port at the rear end of the storage tank body 2 is placed in the mixing outlet of the epoxy resin coating machine, the epoxy resin coating machine is started, the discharge time is set according to the capacity of the storage tank body 2, and after the storage tank body 2 is filled with epoxy resin mixed material, the epoxy resin coating machine is closed, and the storage tank body 2 filled with epoxy resin mixed material is taken down.

[0057] S3, the driving piston 123 is used to block the material inlet of the storage tank 2, then the storage tank 2 is installed on the device body, the U-shaped opening direction of the coating nozzle 3 is adjusted to be parallel to the central axis of the handle, and then the storage tank 2 is locked and fixed by the locking mechanism 113: specifically, first, the front end of the driving piston 123 is put into the material inlet of the storage tank 2, and the driving piston 123 is clamped and fixed in the material inlet of the storage tank 2 by using the first groove 1231 and the first sealing assembly 1232, so that the installation of the driving piston 123 in the storage tank 2 is completed, the leakage of the epoxy resin mixed material is avoided, the contact area and time of the epoxy resin mixed material with air are reduced, and the solidification rate of the epoxy resin mixed material is reduced. In work, since the outer diameter of the front end of the driving piston 123 is slightly smaller than the inner wall of the storage tank 2, the driving piston 123 can be moved to the end of the coating nozzle 3 in the storage tank 2 by compressed air; secondly, the storage tank 2 is placed on the device body, the rear end of the storage tank 2 is inserted into the driving chamber 121, the driving piston 123 is aligned with the front end of the driving chamber 121, and the spring in the driving chamber 121 is in a compressed state at this time; then, the front end of the storage tank 2 is also put into the lower support 112, and the spring in the driving chamber 121 is reset at this time, so that the front part of the connecting seat 32 of the coating nozzle 3 is tightly and firmly abutted against the inside of the front end cover 111; finally, the U-shaped opening direction of the coating nozzle 3 is adjusted to be parallel to the central axis direction of the front handle 114, and the outer periphery of the storage tank 2 is further fixed by the locking mechanism 113, so as to ensure the stable connection between the storage tank 2 and the device body.

[0058] S4, the epoxy resin manual coating device is carried to the construction site in the liquid cargo containment system, so that on-site coating can be realized, and the uncontrollable risk caused by transportation after epoxy resin tape coating is reduced; after the power is turned on, the manual switch 131 is actuated to make the device run, then the heating pad 1321 of the heating unit 132 is started and the outer wall of the storage tank 2 is heated by controlling the temperature control switch 1322, and the temperature value displayed on the temperature display bar of the reversible temperature measuring paper 133 is observed. When the temperature reaches 30°C of the ideal temperature, the heating is stopped by the temperature control switch 1322.

[0059] S5, the roller assembly 4 is installed at the front end of the coating nozzle 3, and the installation of the device is completed.

[0060] S6, the coating line is drawn at the position where the epoxy resin needs to be coated in the corner box.

[0061] S7, the epoxy resin manual coating device is placed, the roller assembly 4 is abutted against the upper surface of the corner box, the glue outlet 31 is aligned with the position to be coated, the U-shaped opening direction angle of the coating nozzle 3 is adjusted, the center line of the U-shaped opening of the coating nozzle 3 is coincided with the coating line.

[0062] S8, press the drive switch 122, and perform the manual coating operation. When the epoxy resin mixture in the storage tank 2 is used up, remove the storage tank 2 from the device body, unscrew the coating nozzle 3, and remove the drive piston 123. Repeat steps S1-S8 until the epoxy resin mixture is coated on the coating line of the corner box, and the manual coating operation is completed. Turn off the manual switch 131.

[0063] Since the epoxy resin mixture is prone to solidification, it is usually coated completely in one tank. If there is still epoxy resin mixture in the storage tank 2 after the manual coating operation is completed, the storage tank 2 needs to be cleaned in time. Specifically, open the drive switch 122 and move the drive piston 123 to the end of the coating nozzle 3 of the storage tank 2 by pneumatic pushing until the epoxy resin mixture in the storage tank 2 is completely discharged. At this time, the drive piston 123 is automatically located at the frontmost part of the storage tank 2. After the coating nozzle 3 is removed, the drive piston 123 is taken out for standby. Since the first groove 1231 and the first sealing assembly 1232 of the drive piston 123 are attached to the inner wall of the storage tank 2, when the drive piston 123 is moved by pneumatic pushing, the inner wall of the storage tank 2 can be automatically cleaned.

[0064] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any person skilled in the art can make various changes or equivalent replacements to the features and embodiments without departing from the spirit and scope of the present application. In addition, the features and embodiments can be modified to adapt to specific conditions and materials under the guidance of the present application without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. A method for coating epoxy resin on corner boxes of a film-type liquid cargo containment system, characterized in that: Manual coating of the corner boxes is performed using the epoxy resin manual coating device. The manual epoxy resin coating device comprises a device body, a storage tank body (2), a coating nozzle (3) and a roller assembly (4); the roller assembly (4) comprises two auxiliary wheels (41) connected by a connecting shaft (42), and a clamp (43) is provided on the connecting shaft (42), and the roller assembly (4) is fixed to the front end of the manual epoxy resin coating device through the clamp (43); the storage tank body (2) is detachably mounted on the device body, the storage tank body (2) is a hollow tube with a cavity, and the cavity is used to fill the epoxy resin mixed material, and the rear end of the storage tank body (2) is provided with a feeding port; the coating nozzle (3) comprises a glue outlet (31) and a connecting seat (32), the front end of the glue outlet (31) is provided with a U-shaped opening, and the coating nozzle (3) is detachably mounted on the front end of the storage tank body (2) through the connecting seat (32); The device body includes a support unit (11), a drive unit (12), a temperature control unit (13) and an external pipeline (14); the external pipeline (14) includes a compressed air pipe and an electric wire for providing compressed air and power supply; the support unit (11) is used to provide fixed support for the storage tank (2), and includes a handle for providing a grip point; the drive unit (12) includes a drive chamber (121), a drive switch (122) and a drive piston (123), the drive piston (123) is separately arranged at the front end of the drive chamber (121), and the drive piston (123) is installed in the storage tank (2) through the feed port, the drive chamber (121) is controlled by the drive switch (122) to start and compress air, thereby pushing the drive piston (123) in the storage tank (2) Move forward along the central axis of the storage tank body (2); the temperature control unit (13) includes a manual switch (131), a heating unit (132) and a reversible temperature measuring paper (133); the manual switch (131) is arranged on the side of the driving chamber (121) and is used to control the power supply and power off of the external pipeline (14); the heating unit (132) is adhered and fixed to the inner wall of the support unit (11) and is used to cover the outer wall of the storage tank body (2) and heat it; the heating unit (132) includes a heating pad (1321) and a temperature control switch (1322), the temperature control switch (1322) is used to control the heating of the heating pad (1321), the reversible temperature measuring paper (133) is arranged on the outer wall of the coating nozzle (3), and the reversible temperature measuring paper (133) is provided with a temperature display bar for monitoring the heating temperature; The coating method comprises the following steps: S1. Install the coating nozzle (3) at the front end of the storage tank (2); S2, filling the storage tank (2) with epoxy resin mixed material through the feeding port; S3, using the driving piston (123) to block the feed port of the storage tank (2), then installing the storage tank (2) on the device body, and adjusting the U-shaped opening direction of the coating nozzle (3) to be parallel to the central axis direction of the handle; S4. Carry the device to the construction site, connect the power supply, heat the epoxy resin mixed material in the storage tank (2) through the heating unit (132), and observe the temperature through the temperature value of the reverse temperature measuring paper. When the temperature reaches the ideal temperature, stop heating; S5. Installing the roller assembly (4) at the front end of the epoxy resin manual coating device to complete the installation of the device; S6. Draw coating lines at the locations where epoxy resin needs to be coated on the corner boxes; S7, placing the epoxy resin manual coating device, making the roller assembly (4) rest against the upper surface of the corner box, and aligning the glue outlet (31) with the position to be coated, adjusting the U-shaped opening angle of the coating nozzle (3) so that the center line of the U-shaped opening of the coating nozzle (3) coincides with the coating line; S8. Press the drive switch (122) to perform manual coating. When the epoxy resin mixture in the storage tank (2) is used up, remove the storage tank (2) from the device body, unscrew the coating nozzle (3), remove the drive piston (123), and repeat steps S1-S8 until the coating lines of the corner boxes are all coated with the epoxy resin mixture, completing the manual coating operation.

2. The method for coating epoxy resin on the corner box of a film-type liquid cargo containment system according to claim 1, characterized in that: The roller assembly (4) includes two auxiliary wheels (41), which are movably connected to each other via a connecting shaft (42), so that the two auxiliary wheels (41) can rotate synchronously along the axis of the connecting shaft (42). A hoop (43) is provided above the center position of the connecting shaft (42), and the hoop (43) has an inner diameter that matches the front end of the manual epoxy resin coating device, so that the roller assembly (4) can be sleeved and fixed on the front end of the manual epoxy resin coating device.

3. The method for coating epoxy resin on the corner box of a film-type liquid cargo containment system according to claim 2, characterized in that: The support unit (11) comprises a front end cover (111), a lower support (112) and a handle, wherein the handle comprises a front handle (114) and a rear handle (115); the front handle (114) is welded and fixed below the lower support (112) near the front end, and the drive chamber (121) is welded and fixed at the rear end of the lower support (112); the drive switch (122) and the rear handle (115) are welded and fixed below the drive chamber (121) in sequence from front to back, wherein the center lines of the drive switch (122), the front handle (114) and the rear handle (115) are all located on the same plane, and the rear handle (115) is a hollow structure, and the external pipeline (14) is connected to the drive chamber (121) through the rear handle (115).

4. The method for coating epoxy resin on the corner box of a film-type liquid cargo containment system according to claim 3, characterized in that: The front end of the lower support (112) is welded with the front end cover (111), and a middle hole is opened in the middle of the front end cover (111); the U-shaped opening is connected to the interior of the storage tank body (2) through the middle hole on the front end cover (111); the storage tank body (2) is detachably installed in the lower support (112), and the two ends of the storage tank body (2) are respectively fixed between the front end cover (111) and the drive chamber (121).

5. The method for coating epoxy resin on the corner box of a film-type liquid cargo containment system according to claim 1, characterized in that: The front end of the driving piston (123) is a conical platform, and the rear part of the driving piston (123) is a cylinder. The outer diameter of the cylinder is slightly smaller than the inner wall of the storage tank (2), and a first groove (1231) is provided on the cylinder. The first groove (1231) is provided with a first sealing assembly (1232).

6. The method for coating epoxy resin on the corner box of a film-type liquid cargo containment system according to claim 1, characterized in that: The front end of the storage tank body (2) is provided with a second groove (21), the second sealing assembly (22) is provided on the second groove (21), and the rear portion of the second groove (21) is provided with an external thread (23); the connecting seat (32) of the coating nozzle (3) is provided with an internal thread, the internal thread matches the external thread (23) at the rear portion of the second groove (21), and the coating nozzle (3) is detachably mounted on the front end of the storage tank body (2) via the thread.

7. The method for coating epoxy resin on corner boxes of a film-type liquid cargo containment system according to claim 1, characterized in that: In step S2, the storage tank (2) is filled with an epoxy resin coating machine: the feed port at the rear end of the storage tank (2) is placed at the mixing discharge port of the epoxy resin coating machine, the epoxy resin coating machine is started, and the discharge time is set according to the capacity of the storage tank (2). After the storage tank (2) is filled with the epoxy resin mixed material, the epoxy resin coating machine is turned off, and the storage tank (2) filled with the epoxy resin mixed material is removed.

8. The method for coating epoxy resin on corner boxes of a film-type liquid cargo containment system according to claim 3, characterized in that: A spring is also provided inside the driving chamber (121); In the step S3 of installing the storage tank body (2) on the device body, the rear end of the storage tank body (2) is first inserted into the drive chamber (121), and force is applied to compress the spring. Then, the front end of the storage tank body (2) is placed downward into the lower support (112), and the force is released to reset the spring, so that the front end surface of the connecting seat (32) of the coating nozzle (3) is firmly pressed against the rear end surface of the front cover (111).

9. The method for coating epoxy resin on the corner box of a film-type liquid cargo containment system according to claim 3, characterized in that: The support unit (11) further comprises a locking mechanism (113), one end of the locking mechanism (113) being hinged to one side of the upper end surface of the lower support (112), and the other end of the locking mechanism (113) being locked and fixed to the other side of the upper end surface of the lower support (112) by a bolt assembly, and the inner side surface of the locking mechanism (113) has a shape matching the outer wall of the storage tank body (2); In the step S3 of installing the storage tank body (2) on the device body, the storage tank body (2) is placed in the lower support (112), and then the storage tank body (2) is locked and fixed in the lower support (112) by the locking mechanism (113).

10. A method for coating epoxy resin on corner boxes of a film-type liquid cargo containment system according to any one of claims 1 to 9, characterized in that: In step S8, after the manual coating operation is completed, if there is still residual epoxy resin mixed material in the storage tank (2), the storage tank (2) is promptly emptied, the storage tank (2) is removed from the device body, the coating nozzle (3) is removed, and the driving piston (123) is taken out for standby use.

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