Spraying trolley and construction method for applying sealing layer to the inner wall of gas storage chamber

Abstract

This invention relates to the field of gas storage chamber construction technology, and more particularly to a spraying trolley and construction method for spraying a sealing layer onto the inner wall of a gas storage chamber. The spraying trolley includes a mobile body, a paint supply assembly, a lateral lifting mechanism, and a rotary spraying mechanism; the rotary spraying mechanism is mounted on the mobile body via the lateral lifting mechanism; the paint supply assembly provides paint to the rotary spraying mechanism. This construction method, through multi-step coordinated operation, significantly improves the spraying accuracy and quality for achieving the target spray thickness.

Description

Technical Field

[0001] This invention relates to the field of gas storage chamber construction technology, and in particular to a spraying trolley and construction method for spraying a sealing layer on the inner wall of a gas storage chamber. Background Technology

[0002] In the construction of underground gas storage chambers, the method of spraying and curing coatings onto the inner walls of the chambers to form a uniformly thick sealing layer is crucial for their application. Simply using existing trolleys and working mechanisms will result in insufficient positioning accuracy, making it difficult to achieve a uniformly thick sealing layer on the inner walls of the gas storage chambers.

[0003] Furthermore, the coating used for the sealing layer of the gas storage chamber's inner wall is generally a two-component polyurea coating, which has an extremely short curing time. During the spraying process, due to the rapid curing, some coating fails to reach the inner wall of the gas storage chamber and solidifies in the air, forming dust. This dust formation is particularly noticeable when spraying large-diameter gas storage chambers. If this dust settles on the inner wall of the gas storage chamber and is not removed before applying the coating, this dust will become trapped inside the polyurea coating, creating unacceptable defects and affecting the final coating quality.

[0004] Therefore, a spraying trolley and construction method are needed for spraying the sealing layer of the inner wall of a gas storage chamber to solve the problems of insufficient vehicle positioning accuracy, insufficient coating thickness uniformity and low coating quality in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a spraying trolley and construction method for spraying a sealing layer on the inner wall of a gas storage chamber. The specific technical solution is as follows:

[0006] In a first aspect, the present invention provides a spraying trolley for spraying a sealing layer on the inner wall of a gas storage chamber, comprising a mobile vehicle body, a paint supply assembly, a transverse lifting mechanism, and a rotary spraying mechanism.

[0007] The lateral lifting mechanism is mounted on the mobile vehicle body;

[0008] The rotary spraying mechanism includes a rotary drive, an annular rotary spray frame, a spray gun assembly, and a rotary joint; the fixed end of the rotary drive is disposed on the transverse lifting mechanism, while its rotary working end is connected to the annular rotary spray frame; the spray gun assembly includes a spray gun body disposed at the radially outer end of the annular rotary spray frame, used to spray paint onto the inner wall of the gas storage chamber;

[0009] The rotary joint includes a fixed joint assembly, a rotary head assembly, and bearings; the fixed joint assembly is fixedly mounted on the transverse lifting mechanism and coaxially sleeved on the outside of the rotary head assembly; the fixed joint assembly is connected to the rotary head assembly via the bearings at both axial ends; the rotary head assembly is connected to the annular rotary spraying frame and rotates synchronously with the annular rotary spraying frame;

[0010] A first feeding channel and a second feeding channel are provided at intervals on the axial outer wall of the rotary head assembly; a third feeding channel communicating with the first feeding channel and a fourth feeding channel communicating with the second feeding channel are provided on the fixed joint assembly.

[0011] The paint supply assembly is mounted on the mobile vehicle body and includes a first feeding pipe connected to the third feeding channel and a second feeding pipe connected to the fourth feeding channel.

[0012] The spray gun assembly includes a first feed pipe connected to the first feed channel and a second feed pipe connected to the second feed channel; the feed ends of the first feed pipe and the second feed pipe are both connected to the liquid storage chamber of the spray gun body.

[0013] The annular rotary spray gun is located on one side of the mobile vehicle body, and the distance between it and the mobile vehicle body's walking components along its walking direction is greater than twice the width of the fan-shaped spray pattern formed by the spray gun body spraying paint onto the inner wall of the gas storage chamber.

[0014] Optionally, a seal may be provided between the third feed channel and the fourth feed channel.

[0015] Optionally, the spraying trolley further includes a compressed gas supply assembly; the compressed gas supply assembly includes a compressed air supply device and an air delivery pipeline; the compressed air supply device is mounted on the mobile vehicle body, and its air supply port is connected to the air delivery pipeline; a pressure regulating valve is provided on the air delivery pipeline.

[0016] Multiple first air inlet channels are spaced apart on the axial outer wall of the rotary head assembly; multiple second air inlet channels are provided on the fixed joint assembly; the number of second air inlet channels is equal to the number of first air inlet channels, and the two are connected in a one-to-one correspondence; multiple air supply branches are provided on the air supply pipeline, and are connected in a one-to-one correspondence with each of the second air inlet channels; the air inlet end of each first air inlet channel is connected to the liquid storage chamber of the spray gun body through a corresponding air inlet pipeline;

[0017] A second air intake channel is provided between the third feed channel and the fourth feed channel, and is separated from each other by a seal; a second air intake channel is provided on the side of the third feed channel away from the fourth feed channel, and is separated from each other by a seal; a second air intake channel is provided on the side of the fourth feed channel away from the third feed channel, and is separated from each other by a seal.

[0018] Optionally, there are multiple first feeding channels and multiple third feeding channels, and they are connected in a one-to-one correspondence; there are multiple second feeding channels and multiple fourth feeding channels, and they are connected in a one-to-one correspondence.

[0019] Optionally, the spraying trolley further includes a dust collection assembly; the dust collection assembly includes dust collection hoods correspondingly disposed on one or both sides of the spray gun body; the dust collection hoods are disposed on the annular rotary spray frame and are sequentially connected to a first dust collection channel and a second dust collection channel; the first dust collection channel is disposed axially on the rotary head assembly; and the second dust collection channel, which communicates with the first dust collection channel, is disposed on the fixed joint assembly.

[0020] Optionally, the vacuuming assembly further includes a vacuuming power unit, a first vacuuming pipe, a second vacuuming pipe, and a dust collection bag; the vacuuming power unit is mounted on the mobile vehicle body, its suction inlet is connected to the second vacuuming channel through the first vacuuming pipe, and its dust outlet is connected to the dust collection bag; the vacuuming hood is connected to the first vacuuming channel through the second vacuuming pipe.

[0021] The distance between the dust hood and the spray gun body is set to 250~400mm.

[0022] Optionally, multiple open-type inverted trapezoidal frames are sequentially arranged on the outer circumference of the annular rotary spray frame, with the large opening end of the inverted trapezoidal frame facing the radial outer end of the annular rotary spray frame and the small opening end facing the radial inner end of the annular rotary spray frame; an adhesive layer is provided on each frame surface enclosed by the inverted trapezoidal frames for adhering the paint that has not been sprayed onto the inner wall of the gas storage chamber.

[0023] The spray gun body is mounted on the small opening end of the inverted trapezoidal frame.

[0024] Optionally, the spray gun assembly further includes a flow meter and a flow regulating valve; the flow meter and the flow regulating valve are installed on both the first feed pipe and the second feed pipe.

[0025] Optionally, the lateral sliding and lifting mechanism includes a frame, a lateral sliding sleeve assembly, a lateral sliding drive component, a lifting sleeve assembly, a lifting drive component, and a mounting plate; the frame is mounted on the mobile vehicle body; two lateral sliding sleeve assemblies are arranged on both sides of the frame, with the lateral sliding ends of the two lateral sliding sleeve assemblies facing each other, and respectively connected to the mounting plate through the lifting sleeve assembly; the lateral sliding drive component is disposed within the lateral sliding sleeve assembly and is used to drive the lateral sliding end of the lateral sliding sleeve assembly to move laterally; the lifting drive component is disposed within the lifting sleeve assembly and is used to drive the lifting end of the lifting sleeve assembly to move up and down; the mounting plate is disposed on the lifting end of the lifting sleeve assembly and is connected to the fixed end of the rotary drive component.

[0026] Optionally, the mobile vehicle body includes a frame, a control room, and a walking assembly; the walking assembly includes an angle-adjustable walking unit and a guiding walking unit;

[0027] The number of angle-adjustable walking units is multiple, and they are symmetrically arranged at the bottom of the frame; each angle-adjustable walking unit includes a walking drive component, a first connecting shaft, and an angle-adjustable wheel; the fixed end of the walking drive component is connected to the frame, and its output end is connected to the angle-adjustable wheel through the first connecting shaft.

[0028] The guide walking units are numerous and symmetrically arranged on both sides of the vehicle frame, with their walking guide ends pressed tightly against the inner wall of the gas storage chamber. Each guide walking unit includes a walking guide wheel, a second connecting shaft, and an elastic pressing mechanism. The walking guide wheel is the walking guide end. One end of the second connecting shaft is connected to the vehicle frame, while the other end is connected to the walking guide wheel through the elastic pressing mechanism. The elastic pressing mechanism is in a pressing state.

[0029] The control room is mounted on the vehicle frame and houses the main controller. The main controller is connected to the rotary drive, the compressed air supply device, the air pressure regulating valve, the spray gun body, the dust suction power unit, the flow meter, the flow regulating valve, the lateral drive, the lifting drive, and the travel drive.

[0030] Optionally, the paint supply assembly includes a first storage tank, a second discharge tank, a first feed pump, and a second feed pump; the first storage tank is sequentially connected to the third feed channel, the first feed channel, the first feed pipe, and the spray gun body via the first feed pipe; the first feed pump is disposed on the first feed pipe; the second storage tank is sequentially connected to the fourth feed channel, the second feed channel, the second feed pipe, and the spray gun body via the second feed pipe; the second feed pump is disposed on the second feed pipe;

[0031] The paint supply assembly further includes a cantilever crane for feeding the first and second storage bins; the cantilever crane is mounted on the vehicle frame; and a feeding port for feeding the cantilever crane is provided on the vehicle frame.

[0032] The first feed pump, the second feed pump, and the cantilever crane are all connected to the main controller.

[0033] Optionally, it also includes a laser rangefinder sensor positioned at the axis of the annular rotary painting frame; the laser rangefinder sensor is mounted on the vehicle frame and connected to the main controller.

[0034] In a second aspect, the present invention provides a method for applying a spraying trolley for spraying a sealing layer onto the inner wall of a gas storage chamber, comprising:

[0035] Step S1: The main controller starts the walking drive to move the spraying trolley to the innermost part of the air storage chamber, wherein the annular rotary spraying frame is adjacent to the innermost part of the air storage chamber; then, the main controller uses the laser ranging sensor to collect and determine whether the axis of the annular rotary spraying frame coincides with the center of the air storage chamber; if they do not coincide, the main controller controls the lateral drive and the lifting drive to make the axis of the annular rotary spraying frame coincide with the axis of the air storage chamber;

[0036] Step S2: Based on the target coating thickness h0 of the sealing layer on the inner wall of the gas storage chamber, the main controller sets the spray flow rate Q of the spray gun body to the spray gun assembly, and sets the rotation speed v0 of the rotary drive component to drive the annular rotary spray frame to rotate in conjunction with the spray gun body. Then, combined with the inner diameter D of the gas storage chamber, and the fan width b formed by the spray gun body spraying the paint onto the inner wall of the gas storage chamber by the spray flow rate Q, the single layer thickness σh of the spray gun body sprayed onto the inner wall of the gas storage chamber by the annular rotary spray frame rotating once is determined. Finally, based on the ratio of h0 / σh, the total number of spraying revolutions N1 required to achieve the target coating thickness when the current axial width of the inner wall of the gas storage chamber is one times the fan width b is determined.

[0037] Step S3: Based on the total number of spraying circles N1, the single fan width b, and the inner diameter D and rotation speed v0 of the air storage chamber, determine the spraying time t of the spray gun body rotating one revolution with the annular rotary spraying frame. Then, use the main controller to control the traveling drive component to drive the spraying trolley to travel at a speed v1 towards the entrance of the air storage chamber. Determine the number of revolutions N2 of the spray gun body rotating with the annular rotary spraying frame when the spraying trolley has traveled one revolution of the current circumferential inner wall single fan width b in the air storage chamber.

[0038] Step S4: Determine the number of reciprocating movements M1 required for the spraying trolley to complete the target spraying thickness of a single fan width b on the current circumferential inner wall of the gas storage chamber, based on the ratio of N1 / N2.

[0039] If the ratio of N1 / N2 has a remainder of M2 revolutions, the main controller controls the traveling drive to link the spraying trolley to move back and forth M1 times for spraying, then controls the spraying trolley to stop, and the main controller controls the rotary drive to drive the annular rotary spraying frame to rotate in conjunction with the spray gun body to complete the M2 revolutions of spraying, thereby achieving the target spraying thickness of the current circumferential inner wall single fan width b in the gas storage chamber;

[0040] During the spraying operation, the main controller controls the first feeding pump and the flow regulating valve on the first feed pipeline to feed according to Q / 2, and the feed material is polyurea component A; wherein, the feed amount on the first feed pipeline is monitored by the flow meter installed thereon and fed back to the main controller; the main controller controls the second feeding pump and the flow regulating valve on the second feed pipeline to feed according to Q / 2, and the feed material is polyurea component B; wherein, the feed amount on the second feed pipeline is monitored by the flow meter installed thereon and fed back to the main controller; the main controller controls the dust collection power unit to work with the dust collection hood to complete the dust collection operation; the main controller controls the compressed air supply device and the air pressure regulating valve to control the air pressure P in the first air intake channel and the second air intake channel to be 0.5~0.9MPa;

[0041] Wherein, the value of h0 ranges from 0.5 to 20 mm; the value of Q ranges from 3.78 × 10⁻⁶. -5 ~1.26×10 - 4 m 3 / s; the value of v0 ranges from 0.5 to 1.2 m / s; the value of D ranges from 6 to 20 m; the value of b ranges from 0.2 to 0.5 m; the value of σh ranges from 6.3 × 10⁻⁶ m / s. -5 ~1.26×10 -3 m 3 / s; the value of N1 ranges from 1 to 318; the value of t ranges from 15 to 126s; the value of v1 ranges from 0.3 × 10 -3 ~1.2×10 -3 m / s; the value of N2 ranges from 1 to 107; the value of M1 ranges from 1 to 238; the value of M2 ranges from 0 to 105.

[0042] Optionally, the construction method further includes step S5, that is, the main controller controls the spraying trolley to move forward and position itself at the starting point of the next ring, and repeats step S4 to complete the target spraying thickness of the next ring towards the inner wall of the gas storage chamber, which is one times the width b of the fan.

[0043] Step S4 further includes applying a grease layer to the inner walls of the first and second suction channels;

[0044] In step S1, the main controller is used to control each of the walking drive components to drive each of the first connecting shafts to tilt each of the angle adjustment wheels outwards until the radial direction of the angle adjustment wheels coincides with the radial direction of the gas storage chamber; the main controller also includes each of the walking guide wheels being pressed against the inner wall of the gas storage chamber by the corresponding elastic clamping mechanism.

[0045] The application of the technical solution of the present invention has at least the following beneficial effects:

[0046] (1) The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber provided by the present invention, by setting a fixed joint assembly and a rotary head assembly that rotate relative to each other in the rotary joint, and further by setting a first feeding channel and a second feeding channel at intervals on the axial outer wall of the rotary head assembly, and setting a third feeding channel communicating with the first feeding channel and a fourth feeding channel communicating with the second feeding channel on the fixed joint assembly, facilitates the separate feeding of polyurea component A from the first feeding channel and the third feeding channel to the spray gun body, and the separate feeding of polyurea component B from the second feeding channel and the fourth feeding channel to the spray gun body. The spray gun body supplies the material, and the polyurea A component and polyurea B component are mixed in the liquid storage chamber of the spray gun body only before spraying. This avoids premature mixing, which could lead to curing and clogging of the rotary joint, as well as the feed channel and pipeline. Therefore, by modifying the rotary joint structure to achieve delayed mixing of polyurea A component and polyurea B component, not only is continuous spraying operation achieved without interruption, thus avoiding the problems of uneven paint flow, poor spraying quality, and numerous joints that occur when spraying is stopped midway, but it also reduces the probability of curing in the air and forming dust. At the same time, delayed mixing of polyurea A component and polyurea B component can also improve the fluidity of the paint and improve the spraying quality. Furthermore, this invention uses a rotary drive component to drive the annular rotary spray frame in conjunction with the spray gun body for rotary spraying, which improves the uniformity of spraying. Further, the spray gun body is located at the radially outer end of the annular rotary spray frame, significantly shortening the distance between it and the inner wall of the air storage chamber. This greatly reduces the probability of the paint solidifying in the air and forming dust after being sprayed out, and ensures that the paint is almost entirely sprayed onto the inner wall of the air storage chamber. Additionally, this invention employs a transverse lifting mechanism to easily adjust the axis of the annular rotary spray frame to coincide with the axis inside the air storage chamber, achieving precise positioning of the entire vehicle and improving subsequent spraying accuracy.

[0047] (2) The present invention provides a seal between the third feed channel and the fourth feed channel to improve the separation effect of polyurea component A and polyurea component B; further, a second air intake channel is provided between the third feed channel and the fourth feed channel and is separated from each other by a seal to improve the separation effect of polyurea component A and polyurea component B by airflow; even further, a second air intake channel is provided on the side of the third feed channel away from the fourth feed channel and is separated from each other by a seal to prevent grease in the bearing from contaminating polyurea component A by airflow; a second air intake channel is provided on the side of the fourth feed channel away from the third feed channel and is separated from each other by a seal to prevent grease in the bearing from contaminating polyurea component B by airflow.

[0048] (3) In this invention, multiple open-type inverted trapezoidal frames are arranged sequentially on the outer circumference of the annular rotary spray frame, with the large opening end of the inverted trapezoidal frame facing the radial outer end of the annular rotary spray frame and the small opening end facing the radial inner end of the annular rotary spray frame; an adhesive layer is provided on each frame surface enclosed by the inverted trapezoidal frame for adhering the paint that has not been sprayed onto the inner wall of the gas storage chamber; the spray gun body is set on the small opening end of the inverted trapezoidal frame, and the paint sprayed from it is easy for the paint that has not adhered to the inner wall surface to fall or scatter on the adhesive layer and be adhered, and the adhesive layer provided on each frame surface of the inverted trapezoidal frame is an inclined surface adhesive layer, which can limit the unadhered paint as much as possible within the funnel-shaped inclined surface enclosed by it. Combined with the dust suction component for the paint that has not adhered to the inner wall surface, the paint that has not adhered to the inner wall surface can be almost completely removed, thereby avoiding the impact of the unadhered paint falling onto the inner wall surface of the gas storage chamber on the coating quality. Applying a grease layer to the inner walls of the first and second dust collection channels reduces paint adhesion and decreases maintenance frequency. Setting the distance between the dust collection hood and the spray gun body to 250-400mm improves dust collection efficiency. However, if this distance is too small, negative pressure can easily form, causing the paint spray surface to distort and affecting the coating quality. If the distance is too large, the dust collection effect is poor, and paint will overflow into the air, resulting in incomplete dust collection and affecting the coating quality. Furthermore, the dust collection assembly and the adhesive layer on the inverted trapezoidal frame can also adsorb other dust particles, reducing the impact of dust on the coating quality. When the adhesive layer is saturated or its adhesion is insufficient, it should be replaced with a new one.

[0049] (4) The paint supply assembly used in this invention also includes a cantilever crane, which facilitates continuous material supply for the spraying operation. The vehicle frame structure used in this invention is simple, and after being supported by the walking assembly, it can provide passage space for vehicles passing through the gas storage chamber.

[0050] (5) The construction method of the spraying trolley used in this invention, in step S1, the main controller controls the transverse drive and the lifting drive to link the axis of the annular rotary spraying frame to coincide with the axis of the air storage chamber, which facilitates the improvement of subsequent spraying accuracy; in step S2, the total number of spraying circles N1 required to achieve the target spraying thickness when the axial width of the current circumferential inner wall in the air storage chamber is a single fan width b is determined; in step S3, the spraying trolley is determined to travel in the air storage chamber. When completing one rotation of the current circumferential inner wall width b, the number of revolutions N2 of the spray gun body with the annular rotary spray frame; in step S4, the ratio of N1 / N2 determines the number of reciprocating movements M1 required for the spraying trolley to complete the target spraying thickness of the current circumferential inner wall width b in the air storage chamber; if the ratio of N1 / N2 has a remainder of M2 revolutions, then M2 more spraying operations are needed to complete the target spraying thickness and achieve uniform coating thickness. Therefore, the construction method adopted in this invention greatly improves the spraying accuracy of the target spraying thickness through multi-step collaborative operation. In addition, the present invention first moves the spraying trolley to the innermost part of the air storage chamber, and the annular rotary spraying frame is adjacent to the innermost part of the air storage chamber. During the spraying operation, the spraying trolley is then moved towards the entrance of the air storage chamber. The distance between the annular rotary spraying frame and the walking component of the walkable vehicle body along its walking direction is greater than twice the width of the fan-shaped spray pattern formed by the spray gun body spraying the paint onto the inner wall of the air storage chamber. This directly avoids the impact of the walking component rolling onto the spraying surface on the coating quality.

[0051] (6) In step S1 of the present invention, the main controller controls each of the walking drive components to drive each of the first connecting shafts to tilt each of the angle adjustment wheels outwards until the radial direction of the angle adjustment wheel coincides with the radial direction of the air storage chamber, which facilitates the improvement of the stability of the spraying trolley when it moves; furthermore, each of the walking guide wheels is pressed against the inner wall of the air storage chamber through the corresponding elastic pressing mechanism, which can prevent the snaking phenomenon when the spraying trolley moves and prevent the spraying trolley from crawling towards the tunnel wall.

[0052] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the spraying trolley used for spraying the sealing layer of the gas storage chamber's inner wall in the embodiment.

[0055] Figure 2 yes Figure 1 Top view;

[0056] Figure 3 This is a partially enlarged schematic diagram of the annular rotary spray gun at its radial outer end;

[0057] Figure 4 This is a schematic diagram of the cross-section of the annular rotary spray gun at its radial outer end;

[0058] Figure 5 This is a schematic diagram of the rotary joint.

[0059] Figure 6 This is an axial sectional view of the rotary joint;

[0060] Figure 7 This is a schematic diagram of the horizontal lifting mechanism;

[0061] Figure 8 This is a diagram showing the operation of the spraying trolley during spraying in the air storage chamber;

[0062] Reference numerals: 1. Mobile vehicle body; 1.1. Vehicle frame; 1.2. Angle-adjustable traveling unit; 1.3. Guide traveling unit; 2. Paint supply assembly; 2.1. Cantilever crane; 3. Lateral sliding and lifting mechanism; 3.1. Frame; 3.2. Lateral sliding sleeve assembly; 3.3. Lifting sleeve assembly; 3.4. Mounting plate; 4. Rotary spraying mechanism; 4.1. Circular rotary spraying frame; 4.1.1. Inverted trapezoidal frame; 4.2. Spray gun body; 4.3. Rotary joint; 4.3.1. Fixed joint assembly; 4.3.1a. Rotary outer sleeve; 4.3.1b. Electric slip ring mounting bracket; 4.3.1 4.3.1.1 Third feeding channel; 4.3.1.2 Fourth feeding channel; 4.3.1.3 Second air intake channel; 4.3.2 Rotary head assembly; 4.3.2a Rotary head body; 4.3.2b Connecting moving head; 4.3.2c Electric slip ring body; 4.3.2.1 First feeding channel; 4.3.2.2 Second feeding channel; 4.3.2.3 First dust suction channel; 4.3.3 Bearing; 4.3.4 Seal; 4.4 Rotary drive component; 5 Dust suction assembly; 5.1 Dust suction power component; 5.2 Dust suction hood; 6 Laser rangefinder sensor; W. Inner wall of the air storage chamber. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0064] Example:

[0065] The spraying trolley used for spraying the sealing layer of the inner wall of the gas storage chamber includes a mobile vehicle body 1, a paint supply assembly 2, a transverse lifting mechanism 3, and a rotary spraying mechanism 4.

[0066] The lateral lifting mechanism 3 is mounted on the mobile vehicle body 1;

[0067] The rotary spraying mechanism 4 includes a rotary drive component 4.4 (such as a rotary motor), an annular rotary spray frame 4.1, a spray gun assembly, and a rotary joint 4.3. The fixed end of the rotary drive component 4.4 is disposed on the transverse lifting mechanism 3, while its rotary working end is connected to the annular rotary spray frame 4.1. The spray gun assembly includes a spray gun body 4.2 disposed at the radial outer end of the annular rotary spray frame 4.1, used to spray paint onto the inner wall of the gas storage chamber. The spray gun body 4.2 is disposed at the radial outer end of the annular rotary spray frame 4.1, and the distance between it and the inner wall W of the gas storage chamber is significantly shortened, which greatly reduces the probability of the paint solidifying in the air and forming dust after being sprayed out, and can promote that the paint is almost completely sprayed onto the inner wall W of the gas storage chamber.

[0068] The rotary joint 4.3 includes a fixed joint assembly 4.3.1, a rotary head assembly 4.3.2, and a bearing 4.3.3. The fixed joint assembly 4.3.1 is fixedly mounted on the transverse lifting mechanism 3 and is coaxially sleeved on the outside of the rotary head assembly 4.3.2. The fixed joint assembly 4.3.1 is connected to the rotary head assembly 4.3.2 at both axial ends via the bearings 4.3.3. The rotary head assembly 4.3.2 is connected to the annular rotary spraying frame 4.1 and rotates synchronously with the annular rotary spraying frame 4.1.

[0069] A first feed channel 4.3.2.1 and a second feed channel 4.3.2.2 are provided at intervals on the axial outer wall of the rotary head assembly 4.3.2; a third feed channel 4.3.1.1 communicating with the first feed channel 4.3.2.1 and a fourth feed channel 4.3.1.2 communicating with the second feed channel 4.3.2.2 are provided on the fixed joint assembly 4.3.1, which facilitates the separate feeding of polyurea component A from the first feed channel 4.3.2.1 and the third feed channel 4.3.1.1 to the spray gun body 4.2, and the separate feeding of polyurea component B from the second feed channel 4.3.2.2 and the fourth feed channel 4.3.1.2 to the spray gun body 4.2, thus avoiding mixed curing.

[0070] The paint supply assembly 2 is mounted on the mobile vehicle body 1, and includes a first feeding pipe connected to the third feeding channel 4.3.1.1 and a second feeding pipe connected to the fourth feeding channel 4.3.1.2;

[0071] The spray gun assembly includes a first feed pipe connected to the first feed channel 4.3.2.1 and a second feed pipe connected to the second feed channel 4.3.2.2. The feed ends of both the first and second feed pipes are connected to the liquid storage chamber of the spray gun body 4.2, allowing polyurea component A and polyurea component B to mix in the liquid storage chamber of the spray gun body 4.2 only before spraying. This avoids premature mixing that could cause curing and blockage of the rotary joint 4.3, as well as the feed channels and pipes. Therefore, by modifying the structure of the rotary joint 4.3 to achieve delayed mixing of polyurea component A and polyurea component B, not only is the spraying operation successfully completed, but the probability of curing in the air and forming dust is also reduced. Furthermore, delayed mixing of polyurea component A and polyurea component B can improve the fluidity of the coating and enhance the spraying quality.

[0072] The annular rotary spray gun 4.1 is located on one side of the mobile vehicle body 1, and the distance between it and the walking component of the mobile vehicle body 1 along its walking direction is greater than twice the width of the fan-shaped spray gun body 4.2 spraying paint onto the inner wall W of the gas storage chamber.

[0073] A radial reinforcing support is provided on the annular rotary spraying frame 4.1 to enhance the stability of the annular rotary spraying frame 4.1.

[0074] A sealing element 4.3.4 (such as a rubber sealing ring) is provided between the third feed channel 4.3.1.1 and the fourth feed channel 4.3.1.2 to facilitate the separation of polyurea component A and polyurea component B.

[0075] The spraying trolley also includes a compressed gas supply assembly; the compressed gas supply assembly includes a compressed air supply device and an air delivery pipeline; the compressed air supply device is installed on the mobile vehicle body 1, and its air supply port is connected to the air delivery pipeline; a pressure regulating valve is installed on the air delivery pipeline.

[0076] Multiple first air intake channels are spaced apart on the axial outer wall of the rotary head assembly 4.3.2; multiple second air intake channels 4.3.1.3 are provided on the fixed joint assembly 4.3.1; the number of second air intake channels 4.3.1.3 is equal to the number of first air intake channels, and the two are connected one-to-one (specifically, they are connected through the rotational movement gap between the stationary outer sleeve 4.3.1a and the rotary head body 4.3.2a); multiple air supply branches are provided on the air supply pipeline, and they are connected one-to-one with each of the second air intake channels 4.3.1.3; the air intake end of each first air intake channel is connected to the liquid storage chamber of the spray gun body 4.2 through a corresponding air intake pipeline to provide spraying power for paint spraying;

[0077] A second air intake channel 4.3.1.3 is provided between the third feed channel 4.3.1.1 and the fourth feed channel 4.3.1.2, and is separated from each other by a seal 4.3.4, to facilitate improved separation of polyurea component A and polyurea component B by airflow. The second air intake channel 4.3.1.3 is provided on the side of the third feed channel 4.3.1.1 away from the fourth feed channel 4.3.1.2, and is separated from each other by a seal 4.3.4, to facilitate airflow preventing grease in the bearing 4.3.3 from contaminating polyurea component A. Similarly, the second air intake channel 4.3.1.3 is provided on the side of the fourth feed channel 4.3.1.2 away from the third feed channel 4.3.1.1, and is separated from each other by a seal 4.3.4, to facilitate airflow preventing grease in the bearing 4.3.3 from contaminating polyurea component B.

[0078] The number of the first feeding channel 4.3.2.1 and the number of the third feeding channel 4.3.1.1 are both multiple, and they are connected one-to-one (specifically, they are connected through the rotational movement gap between the stationary outer sleeve 4.3.1a and the rotating head body 4.3.2a) to facilitate continuous feeding; the number of the second feeding channel 4.3.2.2 and the number of the fourth feeding channel 4.3.1.2 are both multiple, and they are connected one-to-one (specifically, they are connected through the rotational movement gap between the stationary outer sleeve 4.3.1a and the rotating head body 4.3.2a) to facilitate continuous feeding.

[0079] The spraying trolley also includes a dust collection assembly 5; the dust collection assembly 5 includes dust collection hoods 5.2 correspondingly disposed on one or both sides of the spray gun body 4.2; the dust collection hoods 5.2 are disposed on the annular rotary spray frame 4.1, and are sequentially connected to the first dust collection channel 4.3.2.3 and the second dust collection channel; the first dust collection channel 4.3.2.3 is disposed axially on the rotary head assembly 4.3.2; the second dust collection channel, which communicates with the first dust collection channel 4.3.2.3, is disposed on the fixed joint assembly 4.3.1.

[0080] The fixed joint assembly 4.3.1 includes a stationary outer sleeve 4.3.1a and an electric slip ring mounting bracket 4.3.1b, which are connected by a flange.

[0081] The rotary head assembly 4.3.2 includes a rotary head body 4.3.2a, a connecting moving head 4.3.2b, and an electric slip ring body 4.3.2c; the rotary head body 4.3.2a and the connecting moving head 4.3.2b are connected by a flange; the electric slip ring body 4.3.2c is mounted on the electric slip ring mounting bracket 4.3.1b and connected to the connecting moving head 4.3.2b, and the electric slip ring body 4.3.2c is used to connect the circuit.

[0082] The rotating, stationary outer sleeve 4.3.1a is coaxially sleeved on the outside of the rotating head body 4.3.2a, and its two axial ends are respectively connected to the rotating head body 4.3.2a through the bearing 4.3.3;

[0083] The first feeding channel 4.3.2.1, the second feeding channel 4.3.2.2, the first air intake channel, and the first dust suction channel 4.3.2.3 are all located on the rotary head body 4.3.2a;

[0084] The third feeding channel 4.3.1.1, the fourth feeding channel 4.3.1.2, the second air intake channel 4.3.1.3, and the second dust suction channel are all located on the rotating, stationary outer sleeve 4.3.1a.

[0085] Multiple grooves are arranged circumferentially on the inner wall of the rotating outer sleeve 4.3.1a for corresponding installation of each of the seals 4.3.4. The depth of each groove is less than the thickness of each seal 4.3.4, so that the seal protrudes from the groove after being installed and elastically fits against the rotating head body 4.3.2a to achieve a sealing and blocking effect.

[0086] The dust collection assembly 5 further includes a dust collection power component 5.1 (such as a dust collection fan), a first dust collection pipe, a second dust collection pipe, and a dust collection bag; the dust collection power component 5.1 is mounted on the mobile vehicle body 1, its suction inlet is connected to the second dust collection channel through the first dust collection pipe, and its dust outlet is connected to the dust collection bag; the dust collection hood 5.2 is connected to the first dust collection channel 4.3.2.3 through the second dust collection pipe;

[0087] The distance between the dust collection hood 5.2 and the spray gun body 4.2 is set to 250~400mm (specifically 300mm), which can improve the dust collection effect.

[0088] Multiple open-type inverted trapezoidal frames 4.1.1 are sequentially arranged on the outer circumference of the annular rotary spraying frame 4.1, with the large opening end of the inverted trapezoidal frame 4.1.1 facing the radial outer end of the annular rotary spraying frame 4.1, and the small opening end facing the radial inner end of the annular rotary spraying frame 4.1.1; an adhesive layer (such as a non-woven fabric layer) is provided on each frame surface enclosed by the inverted trapezoidal frames 4.1.1 for adhering the paint that has not been sprayed onto the inner wall W of the gas storage chamber.

[0089] The spray gun body 4.2 is set on the small opening end of the inverted trapezoidal frame 4.1.1. After the sprayed paint reaches the inner wall W of the gas storage chamber, the paint that does not adhere to the inner wall surface is easy to fall or scatter on the adhesive layer and be adhered. Moreover, the adhesive layer set on each frame surface of the inverted trapezoidal frame 4.1.1 is an inclined adhesive layer, which can confine the unadhesive paint as much as possible within the funnel-shaped inclined surface it forms. Combined with the dust collection component 5's dust collection effect on the paint that does not adhere to the inner wall surface, the paint that does not adhere to the inner wall surface can be almost completely removed, thereby avoiding the impact of unadhesive paint falling onto the inner wall W of the gas storage chamber on the coating quality.

[0090] The spray gun assembly also includes a flow meter and a flow regulating valve; the flow meter and the flow regulating valve are installed on both the first feed pipe and the second feed pipe.

[0091] The lateral lifting mechanism 3 includes a frame 3.1, a lateral sleeve assembly 3.2, a lateral drive component (such as a lateral cylinder), a lifting sleeve assembly 3.3, a lifting drive component (such as a lifting cylinder), and a mounting plate 3.4. The frame 3.1 is mounted on the mobile vehicle body 1. Two lateral sleeve assemblies 3.2 are arranged on both sides of the frame 3.1, with their lateral ends facing each other and connected to the mounting plate 3.4 via the lifting sleeve assembly 3.3. The lateral drive component is located within the lateral sleeve assembly 3.2 and is used to drive the lateral ends of the lateral sleeve assembly 3.2 to move laterally. The lifting drive component is located within the lifting sleeve assembly 3.3 and is used to drive the lifting ends of the lifting sleeve assembly 3.3 to move up and down. The mounting plate 3.4 is located on the lifting ends of the lifting sleeve assembly 3.3 and is connected to the fixed end of the rotary drive component 4.4.

[0092] The transverse sleeve assembly 3.2 includes a first inner sleeve and a first outer sleeve that are coaxially slidably sleeved together; the fixed end of the transverse drive is connected to the first inner sleeve, while the working end is connected to the first outer sleeve; the first outer sleeve is the transverse end.

[0093] The lifting sleeve assembly 3.3 includes a second inner sleeve and a second outer sleeve that are coaxially slidably sleeved together; the fixed end of the lifting drive component is connected to the second inner sleeve, while the working end is connected to the second outer sleeve; the second outer sleeve is the lifting end.

[0094] The end of the first inner sleeve away from the first outer sleeve is connected to the frame 3.1, while the end of the first outer sleeve away from the first inner sleeve is connected to the second inner sleeve; the end of the second outer sleeve away from the second inner sleeve is connected to the mounting plate 3.4.

[0095] The mobile vehicle body 1 includes a frame 1.1, a control room, and a walking assembly; the walking assembly includes an angle-adjustable walking unit 1.2 and a guiding walking unit 1.3;

[0096] The number of angle-adjustable walking units 1.2 is multiple, and they are symmetrically arranged at the bottom of the frame 1.1; each angle-adjustable walking unit 1.2 includes a walking drive component, a first connecting shaft, and an angle-adjusting wheel; the fixed end of the walking drive component is connected to the frame 1.1, and its output end is connected to the angle-adjusting wheel through the first connecting shaft;

[0097] The number of the guiding walking units 1.3 is multiple (e.g., 4), and they are symmetrically arranged on both sides of the frame 1.1, with their walking guide ends pressed against the inner wall of the air storage chamber; each of the guiding walking units 1.3 includes a walking guide wheel, a second connecting shaft, and an elastic pressing mechanism; the walking guide wheel is the walking guide end; one end of the second connecting shaft is connected to the frame 1.1, and the other end is connected to the walking guide wheel through the elastic pressing mechanism; the elastic pressing mechanism (specifically a spring pressing mechanism) is in a pressed state;

[0098] The control room is mounted on the frame 1.1 and contains a main controller (such as a PLC controller). The main controller is connected to the rotary drive 4.4, the compressed air supply device, the air pressure regulating valve, the spray gun body 4.2, the dust suction power component 5.1, the flow meter, the flow regulating valve, the lateral drive, the lifting drive, and the walking drive.

[0099] The paint supply assembly 2 includes a first storage tank, a second discharge tank, a first feed pump, and a second feed pump. The first storage tank is connected in sequence to the third feed channel 4.3.1.1, the first feed channel 4.3.2.1, the first feed pipeline, and the spray gun body 4.2 via the first feed pipeline. The first feed pump is located on the first feed pipeline. The second storage tank is connected in sequence to the fourth feed channel 4.3.1.2, the second feed channel 4.3.2.2, the second feed pipeline, and the spray gun body 4.2 via the second feed pipeline. The second feed pump is located on the second feed pipeline.

[0100] The paint supply assembly 2 further includes a cantilever crane 2.1 for feeding the first and second storage bins; the cantilever crane 2.1 is mounted on the frame 1.1; and a feeding port for feeding the cantilever crane 2.1 is provided on the frame 1.1.

[0101] The first feed pump, the second feed pump, and the cantilever crane 2.1 are all connected to the main controller.

[0102] The painting trolley also includes a laser rangefinder 6 disposed at the axis corresponding to the annular rotary painting frame 4.1; the laser rangefinder 6 is disposed on the frame 1.1 and connected to the main controller.

[0103] The construction method of the spray painting trolley includes:

[0104] Step S1: The main controller starts the walking drive to move the spraying trolley to the innermost part of the air storage chamber, wherein the annular rotary spraying frame 4.1 is adjacent to the innermost part of the air storage chamber; then, the main controller uses the laser ranging sensor 6 to collect and determine whether the axis of the annular rotary spraying frame 4.1 coincides with the center of the air storage chamber; if they do not coincide, the main controller controls the lateral drive and the lifting drive to make the axis of the annular rotary spraying frame 4.1 coincide with the axis of the air storage chamber;

[0105] Step S2: Based on the target coating thickness h0 (specifically 0.005 m) of the sealing layer on the inner wall of the gas storage chamber, the main controller is used to set the spray flow rate Q (specifically 5.45 × 10⁻⁶ m) of the spray gun body 4.2 to the spray gun assembly. -5 The main controller sets the rotational speed v0 (specifically 0.5 m / s) of the rotary drive component 4.4 to drive the annular rotary spray frame 4.1 to rotate in conjunction with the spray gun body 4.2. Combined with the inner diameter D of the air storage chamber (specifically 15 m) and the fan width b (specifically 0.35 m) formed by the spray gun body 4.2 spraying paint onto the inner wall W of the air storage chamber, determined by the spray flow rate Q, the single-layer thickness σh (specifically 0.00031 m) of the spray gun body 4.2 sprayed onto the inner wall W of the air storage chamber with one revolution of the annular rotary spray frame 4.1 is determined as follows: σh = Q × (π × D ÷ v0) ÷ (π × D × b) = Q ÷ b ÷ v0 = 5.45 × 10⁻⁶ m. -5 ÷0.35÷0.5=0.00031 m); Finally, based on the ratio of h0 / σh, determine the total number of spraying circles N1 (specifically 16 circles) required to achieve the target spraying thickness when the axial width of the current circumferential inner wall in the gas storage chamber is one times the fan width b.

[0106] Step S3: Based on the total number of spraying circles N1, the single fan width b, and the inner diameter D of the air storage chamber and the rotation speed v0, determine the spraying time t (specifically 94.2s; t is calculated as follows: t=π×D÷v0=94.2 s) of the spray gun body 4.2 rotating one revolution with the annular rotary spraying frame 4.1. Then, use the main controller to control the walking drive component to drive the spraying trolley to travel at a speed v1 (specifically 0.00074 m / s) towards the entrance of the air storage chamber. Determine the number of revolutions N2 (specifically 5 revolutions; N2 is calculated as follows: N2=b÷(v1×π×D÷v0)=5 revolutions) of the spray gun body 4.2 rotating with the annular rotary spraying frame 4.1 when the spraying trolley has traveled one revolution of the current circumferential inner wall single fan width b in the air storage chamber.

[0107] Step S4: Determine the number of reciprocating movements M1 (specifically 3 times) required for the spraying trolley to complete the target spraying thickness of a single fan width b on the current circumferential inner wall of the air storage chamber, based on the ratio of N1 / N2.

[0108] If the ratio of N1 / N2 has a remainder of M2 (specifically, 1 revolution), then the main controller controls the traveling drive component to link the spraying trolley to move back and forth M1 times for spraying, and then controls the spraying trolley to stop. The main controller then controls the rotary drive component 4.4 to drive the annular rotary spraying frame 4.1 to rotate in conjunction with the spray gun body 4.2 to complete the M2 revolutions of spraying, thereby achieving the target spraying thickness of a single fan width b on the current circumferential inner wall of the gas storage chamber, and realizing the uniformity of the coating thickness.

[0109] During the spraying operation, the main controller controls the first feed pump and the flow regulating valve on the first feed pipeline to feed at a rate of Q / 2, and the feed material is polyurea component A (specifically, component A conforming to GB / T 23446 "Sprayed Polyurea Waterproof Coating"). The feed rate on the first feed pipeline is monitored by the flow meter installed thereon and fed back to the main controller. The main controller controls the second feed pump and the flow regulating valve on the second feed pipeline to feed at a rate of Q / 2, and the feed material is polyurea component B (specifically conforming to GB / T...). The B component of 23446 "Sprayed Polyurea Waterproof Coating" is an amine compound composed of terminal amino resin and amino chain extender, etc. The feed rate in the second feed pipeline is monitored by the flow meter installed thereon and fed back to the main controller; the main controller controls the dust collection power component 5.1 to work in conjunction with the dust collection hood 5.2 to complete the dust collection operation; the main controller controls the compressed air supply device and the air pressure regulating valve to control the air pressure P in the first air intake channel and the second air intake channel 4.3.1.3 to be 0.7 MPa.

[0110] The construction method also includes step S5, that is, the main controller controls the spraying trolley to move forward and position itself to the starting point of the next ring, and repeats step S4 to complete the target spraying thickness of the next ring towards the inner wall of the gas storage chamber, which is one times the width b of the fan.

[0111] Step S4 further includes applying an grease layer to the inner walls of the first dust suction channel 4.3.2.3 and the second dust suction channel, which can reduce the adhesion of paint to the inner walls and reduce the number of maintenance operations.

[0112] In step S1, the main controller is used to control each of the walking drive components to drive each of the first connecting shafts to tilt each of the angle adjustment wheels outwards until the radial direction of the angle adjustment wheels coincides with the radial direction of the air storage chamber, which helps to improve the stability of the spraying trolley when it moves; the main controller also includes each of the walking guide wheels being pressed against the inner wall of the air storage chamber by the corresponding elastic clamping mechanism, which can prevent the spraying trolley from snaking when it moves and prevent the spraying trolley from crawling onto the tunnel wall.

[0113] The construction method used in this embodiment significantly improves the spraying accuracy of the target coating thickness through multi-step collaborative operation. Furthermore, the construction method in this embodiment first moves the spraying trolley to the innermost part of the air storage chamber, with the annular rotary spray frame 4.1 adjacent to the innermost part of the air storage chamber. During the spraying operation, the spraying trolley is then moved towards the entrance of the air storage chamber. The distance between the annular rotary spray frame 4.1 and the traveling component of the mobile vehicle 1 along its traveling direction is greater than that between the spray gun body 4.2 and the paint, forming a fan-shaped spray pattern on the inner wall W of the air storage chamber. This directly avoids the impact of the traveling component rolling onto the spray surface on the coating quality.

[0114] In this embodiment, the spraying trolley achieves delayed mixing of polyurea component A and polyurea component B by modifying the structure of the rotary joint 4.3. This not only ensures smooth completion of the spraying operation but also reduces the probability of dust formation due to curing in the air. Simultaneously, delayed mixing of polyurea components A and B improves the fluidity of the coating and enhances the spraying quality. A sealing element 4.3.4 is provided between the third feed channel 4.3.1.1 and the fourth feed channel 4.3.1.2 to improve the separation effect between polyurea components A and B. Furthermore, a second air intake channel 4.3.1.3 is provided between the third feed channel 4.3.1.1 and the fourth feed channel 4.3.1.2, separated from each other by the sealing element 4.3.4, to facilitate improved separation of polyurea components A and B through airflow. Even further, in the third feed channel... The second air intake channel 4.3.1.3 is provided on the side of the fourth feed channel 4.3.1.2 away from the third feed channel 4.3.1.1, and is separated from it by a seal 4.3.4, so as to facilitate the airflow to prevent grease in the bearing from contaminating the polyurea component A; the second air intake channel 4.3.1.3 is provided on the side of the fourth feed channel 4.3.1.2 away from the third feed channel 4.3.1.1, and is separated from it by a seal 4.3.4, so as to facilitate the airflow to prevent grease in the bearing from contaminating the polyurea component B.

[0115] Furthermore, in this embodiment, the rotary drive unit drives the annular rotary spray frame 4.1 to rotate and spray the spray gun body 4.2, which facilitates improved spray uniformity. Further, the spray gun body 4.2 is located at the radially outer end of the annular rotary spray frame 4.1, significantly shortening the distance between it and the inner wall W of the air storage chamber. This greatly reduces the probability of the paint curing in the air and forming dust after spraying, and ensures that almost all the paint is sprayed onto the inner wall W of the air storage chamber. Additionally, this embodiment employs a transverse lifting mechanism 3 to easily adjust the axis of the annular rotary spray frame 4.1 to coincide with the axis of the air storage chamber, achieving precise vehicle positioning and improving subsequent spray accuracy. Furthermore, in this embodiment, the adhesive layers provided on each frame surface of the inverted trapezoidal frame 4.1.1 are all inclined surface adhesive layers, which can confine the unadhered paint as much as possible within the enclosed funnel-shaped inclined surface. Combined with the dust collection component's dust collection effect on the paint not adhering to the inner wall surface, the paint not adhering to the inner wall surface can be almost completely removed, thereby avoiding the impact of unadhered paint falling onto the inner wall surface of the gas storage chamber on the coating quality.

[0116] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A spraying trolley for applying a sealing layer to the inner wall of a gas storage chamber, characterized in that, It includes a mobile vehicle body (1), a paint supply assembly (2), a lateral lifting mechanism (3), and a rotary spraying mechanism (4). The lateral lifting mechanism (3) is mounted on the mobile vehicle body (1); The rotary spraying mechanism (4) includes a rotary drive (4.4), an annular rotary spray frame (4.1), a spray gun assembly, and a rotary joint (4.3); the fixed end of the rotary drive (4.4) is disposed on the transverse lifting mechanism (3), and its rotary working end is connected to the annular rotary spray frame (4.1); the spray gun assembly includes a spray gun body (4.2) disposed at the radial outer end of the annular rotary spray frame (4.1), used to spray paint onto the inner wall of the gas storage chamber; The rotary joint (4.3) includes a fixed joint assembly (4.3.1), a rotary head assembly (4.3.2), and a bearing (4.3.3); the fixed joint assembly (4.3.1) is fixedly mounted on the transverse lifting mechanism (3) and is coaxially sleeved on the outside of the rotary head assembly (4.3.2); the fixed joint assembly (4.3.1) is connected to the rotary head assembly (4.3.2) at both axial ends via the bearing (4.3.3); the rotary head assembly (4.3.2) is connected to the annular rotary spraying frame (4.1) and rotates synchronously with the annular rotary spraying frame (4.1); A first feed channel (4.3.2.1) and a second feed channel (4.3.2.2) are provided at intervals on the axial outer wall of the rotary head assembly (4.3.2); a third feed channel (4.3.1.1) communicating with the first feed channel (4.3.2.1) and a fourth feed channel (4.3.1.2) communicating with the second feed channel (4.3.2.2) are provided on the fixed joint assembly (4.3.1). The paint supply assembly (2) is mounted on the mobile vehicle body (1), and includes a first feeding pipe connected to the third feeding channel (4.3.1.1) and a second feeding pipe connected to the fourth feeding channel (4.3.1.2); The spray gun assembly includes a first feed pipe connected to the first feed channel (4.3.2.1) and a second feed pipe connected to the second feed channel (4.3.2.2); the feed ends of the first feed pipe and the second feed pipe are both connected to the liquid storage chamber of the spray gun body (4.2); The annular rotary spray gun (4.1) is located on one side of the mobile vehicle body (1), and the distance between it and the walking component of the mobile vehicle body (1) along its walking direction is greater than twice the width of the fan-shaped spray gun body (4.2) spraying paint onto the inner wall of the gas storage chamber.

2. The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 1, characterized in that, A seal (4.3.4) is provided between the third feed channel (4.3.1.1) and the fourth feed channel (4.3.1.2).

3. The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 1, characterized in that, It also includes a compressed gas supply assembly; the compressed gas supply assembly includes a compressed air supply device and an air delivery pipeline; the compressed air supply device is installed on the mobile vehicle body (1), and its air supply port is connected to the air delivery pipeline; a pressure regulating valve is installed on the air delivery pipeline. Multiple first air inlet channels are spaced apart on the axial outer wall of the rotary head assembly (4.3.2); multiple second air inlet channels (4.3.1.3) are provided on the fixed joint assembly (4.3.1); the number of second air inlet channels (4.3.1.3) is equal to the number of first air inlet channels, and the two are connected in a one-to-one correspondence; multiple air supply branches are provided on the air supply pipeline, and are connected in a one-to-one correspondence with each of the second air inlet channels (4.3.1.3); the air inlet end of each first air inlet channel is connected to the liquid storage chamber of the spray gun body (4.2) through the corresponding air inlet pipeline; A second air intake channel (4.3.1.3) is provided between the third feed channel (4.3.1.1) and the fourth feed channel (4.3.1.2), and is separated from each other by a seal (4.3.4); the second air intake channel is provided on the side of the third feed channel (4.3.1.1) away from the fourth feed channel (4.3.1.2). 4.3.1.3), and separated from each other by a seal (4.3.4); a second air intake channel is provided on the side of the fourth feed channel (4.3.1.2) away from the third feed channel (4.3.1.1). 4.3.1.3), and they are separated from each other by a seal (4.3.4).

4. The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 3, characterized in that, The number of the first feeding channel (4.3.2.1) and the number of the third feeding channel (4.3.1.1) are both multiple, and they are connected in a one-to-one correspondence; the number of the second feeding channel (4.3.2.2) and the number of the fourth feeding channel (4.3.1.2) are both multiple, and they are connected in a one-to-one correspondence.

5. The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 3, characterized in that, It also includes a dust collection assembly (5); the dust collection assembly (5) includes a dust collection hood (5.2) correspondingly disposed on one or both sides of the spray gun body (4.2); the dust collection hood (5.2) is disposed on the annular rotary spray frame (4.1), and it is sequentially connected to the first dust collection channel (4.3.2.3) and the second dust collection channel; the first dust collection channel (4.3.2.3) is disposed axially on the rotary head assembly (4.3.2); the second dust collection channel is disposed on the fixed joint assembly (4.3.1) and is connected to the first dust collection channel (4.3.2.3).

6. The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 5, characterized in that, The dust collection assembly (5) further includes a dust collection power component (5.1), a first dust collection pipe, a second dust collection pipe, and a dust collection bag; the dust collection power component (5.1) is mounted on the mobile vehicle body (1), its suction inlet is connected to the second dust collection channel through the first dust collection pipe, and its dust outlet is connected to the dust collection bag; the dust collection hood (5.2) is connected to the first dust collection channel (4.3.2.3) through the second dust collection pipe; The distance between the dust hood (5.2) and the spray gun body (4.2) is set to 250~400mm.

7. The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 6, characterized in that, Multiple open-type inverted trapezoidal frames are sequentially arranged on the outer circumference of the annular rotary spraying frame (4.1). 4.1.1), and the large opening end of the inverted trapezoidal frame (4.1.1) faces the radial outer end of the annular rotary spray frame (4.1), while the small opening end faces the radial inner end of the annular rotary spray frame (4.1); an adhesive layer is provided on each frame surface enclosed by the inverted trapezoidal frame (4.1.1) for adhering the paint that has not been sprayed onto the inner wall of the gas storage chamber; The spray gun body (4.2) is located on the small opening end of the inverted trapezoidal frame (4.1.1).

8. The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 7, characterized in that, The spray gun assembly also includes a flow meter and a flow regulating valve; the flow meter and the flow regulating valve are installed on both the first feed pipe and the second feed pipe.

9. The spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 8, characterized in that, The lateral lifting mechanism (3) includes a frame (3.1), a lateral sleeve assembly (3.2), a lateral drive component, a lifting sleeve assembly (3.3), a lifting drive component, and a mounting plate (3.4); the frame (3.1) is mounted on the mobile vehicle body (1); two lateral sleeve assemblies (3.2) are arranged on both sides of the frame (3.1), and the lateral ends of the two lateral sleeve assemblies (3.2) are arranged facing each other, and are respectively connected to the mounting plate (3.4) through the lifting sleeve assembly (3.3). The mounting plate (3.4) is connected; the transverse drive is disposed in the transverse sleeve assembly (3.2) and is used to drive the transverse end of the transverse sleeve assembly (3.2) to move laterally; the lifting drive is disposed in the lifting sleeve assembly (3.3) and is used to drive the lifting end of the lifting sleeve assembly (3.3) to move up and down; the mounting plate (3.4) is disposed on the lifting end of the lifting sleeve assembly (3.3) and is connected to the fixed end of the rotary drive (4.4).

10. The spraying trolley for spraying a sealing layer on the inner wall of a gas storage chamber as described in claim 9, characterized in that, The mobile vehicle body (1) includes a frame (1.1), a control room, and a walking assembly; the walking assembly includes an angle-adjustable walking unit (1.2) and a guiding walking unit (1.3). The number of angle-adjustable walking units (1.2) is multiple, and they are symmetrically arranged at the bottom of the frame (1.1); each angle-adjustable walking unit (1.2) includes a walking drive component, a first connecting shaft and an angle-adjusting wheel; the fixed end of the walking drive component is connected to the frame (1.1), and its output end is connected to the angle-adjusting wheel through the first connecting shaft; The number of the guiding walking units (1.3) is multiple, and they are symmetrically arranged on both sides of the frame (1.1), with their walking guide ends pressed against the inner wall of the gas storage chamber; each of the guiding walking units (1.3) includes a walking guide wheel, a second connecting shaft, and an elastic pressing mechanism; the walking guide wheel is the walking guide end; one end of the second connecting shaft is connected to the frame (1.1), and the other end is connected to the walking guide wheel through the elastic pressing mechanism; the elastic pressing mechanism is in a pressing state; The control room is mounted on the frame (1.1) and contains a main controller. The main controller is connected to the rotary drive (4.4), the compressed air supply device, the air pressure regulating valve, the spray gun body (4.2), the dust suction power component (5.1), the flow meter, the flow regulating valve, the lateral drive, the lifting drive, and the walking drive.

11. The spraying trolley for spraying a sealing layer on the inner wall of a gas storage chamber as described in claim 10, characterized in that, The paint supply assembly (2) includes a first storage tank, a second discharge tank, a first feed pump, and a second feed pump; the first storage tank is connected in sequence to the third feed channel (4.3.1.1), the first feed channel (4.3.2.1), the first feed pipeline, and the spray gun body (4.2) via the first feed pipeline; the first feed pump is located on the first feed pipeline; the second storage tank is connected in sequence to the fourth feed channel (4.3.1.2), the second feed channel (4.3.2.2), the second feed pipeline, and the spray gun body (4.2) via the second feed pipeline; the second feed pump is located on the second feed pipeline; The paint supply assembly (2) further includes a cantilever crane (2.1) for feeding the first storage bin and the second storage bin; the cantilever crane (2.1) is mounted on the frame (1.1); a feeding port for feeding the cantilever crane (2.1) is provided on the frame (1.1); The first feed pump, the second feed pump, and the cantilever crane (2.1) are all connected to the main controller.

12. The spraying trolley for spraying a sealing layer onto the inner wall of a gas storage chamber as described in claim 11, characterized in that, It also includes a laser rangefinder (6) disposed at the axis of the annular rotary spraying frame (4.1); the laser rangefinder (6) is disposed on the frame (1.1) and connected to the main controller.

13. The construction method of the spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 12, characterized in that, include: Step S1: The main controller starts the walking drive to move the spraying trolley to the innermost end of the air storage chamber, wherein the annular rotary spraying frame (4.1) is adjacent to the innermost end of the air storage chamber; then, the main controller uses the laser ranging sensor (6) to collect and determine whether the axis of the annular rotary spraying frame (4.1) coincides with the center of the air storage chamber; if they do not coincide, the main controller controls the transverse drive and the lifting drive to make the axis of the annular rotary spraying frame (4.1) coincide with the axis of the air storage chamber; Step S2: Based on the target coating thickness h0 of the sealing layer of the gas storage chamber's inner wall, the main controller sets the spray flow rate Q of the spray gun body (4.2) for the spray gun assembly, and sets the rotation speed v0 of the rotary drive component (4.4) to drive the annular rotary spray frame (4.1) to rotate in conjunction with the spray gun body (4.2). Then, combined with the inner diameter D of the gas storage chamber, and the fan width b formed by the spray gun body (4.2) spraying the coating onto the inner wall of the gas storage chamber by the spray flow rate Q, the single layer thickness σh of the spray gun body (4.2) sprayed onto the inner wall of the gas storage chamber by the annular rotary spray frame (4.1) rotating one revolution is determined. Finally, based on the ratio of h0 / σh, the total number of spraying revolutions N1 required to achieve the target coating thickness when the current axial width of the inner wall of the gas storage chamber is one times the fan width b is determined. Step S3: Based on the total number of spraying circles N1, the single fan width b, and the inner diameter D and rotation speed v0 of the air storage chamber, determine the spraying time t of the spray gun body (4.2) rotating one revolution with the annular rotary spraying frame (4.1), and use the main controller to control the walking drive component to drive the spraying trolley to travel at a speed v1 towards the entrance of the air storage chamber, and determine the number of revolutions N2 of the spray gun body (4.2) rotating with the annular rotary spraying frame (4.1) when the spraying trolley has traveled one revolution of the current circumferential inner wall single fan width b in the air storage chamber; Step S4: Determine the number of reciprocating movements M1 required for the spraying trolley to complete the target spraying thickness of a single fan width b on the current circumferential inner wall of the gas storage chamber, based on the ratio of N1 / N2. If the ratio of N1 / N2 has a remainder of M2 revolutions, the main controller controls the traveling drive component to link the spraying trolley to move back and forth M1 times for spraying, then controls the spraying trolley to stop, and the main controller controls the rotary drive component (4.4) to drive the annular rotary spraying frame (4.1) to link the spray gun body (4.2) to rotate and complete the M2 revolutions of spraying, thereby achieving the target spraying thickness of the current circumferential inner wall single fan width b in the gas storage chamber; In the spraying operation, the main controller controls the first feeding pump and the flow regulating valve on the first feed pipeline to feed according to Q / 2, and the feed is polyurea component A; wherein, the feed amount on the first feed pipeline is monitored by the flow meter installed thereon and fed back to the main controller; the main controller controls the second feeding pump and the flow regulating valve on the second feed pipeline to feed according to Q / 2, and the feed is polyurea component B; wherein, the feed amount on the second feed pipeline is monitored by the flow meter installed thereon and fed back to the main controller; the main controller controls the dust collection power unit (5.1) to work with the dust collection hood (5.2) to complete the dust collection operation; the main controller controls the compressed air supply device and the air pressure regulating valve to control the air pressure P in the first air intake channel and the second air intake channel (4.3.1.3) to be 0.5~0.9MPa; Wherein, the value of h0 ranges from 0.5 to 20 mm; the value of Q ranges from 3.78 × 10⁻⁶. -5 ~1.26×10 -4 m 3 / s; the value of v0 ranges from 0.5 to 1.2 m / s; the value of D ranges from 6 to 20 m; the value of b ranges from 0.2 to 0.5 m; the value of σh ranges from 6.3 × 10⁻⁶ m / s. -5 ~1.26×10 -3 m 3 / s; the value of N1 ranges from 1 to 318; the value of t ranges from 15 to 126s; the value of v1 ranges from 0.3 × 10 -3 ~1.2×10 -3 m / s; the value of N2 ranges from 1 to 107; the value of M1 ranges from 1 to 238; the value of M2 ranges from 0 to 105.

14. The construction method of the spraying trolley for spraying the sealing layer of the inner wall of a gas storage chamber as described in claim 13, characterized in that, It also includes step S5, which is that the main controller controls the spraying trolley to move forward and position itself to the starting point of the next ring, repeats step S4, and completes the target spraying thickness of the next ring towards the inner wall of the gas storage chamber, which is one times the width b of the fan. Step S4 further includes applying a grease layer to the inner walls of the first suction channel (4.3.2.3) and the second suction channel; In step S1, the main controller is used to control each of the walking drive components to drive each of the first connecting shafts to tilt each of the angle adjustment wheels outwards until the radial direction of the angle adjustment wheels coincides with the radial direction of the gas storage chamber; the main controller also includes each of the walking guide wheels being pressed against the inner wall of the gas storage chamber by the corresponding elastic clamping mechanism.

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