A sealed can for storing and transporting paint

Abstract

The present invention discloses a sealed tank for storing and transporting paint, and relates to the field of paint transport and storage equipment, which comprises a tank body, a sealed push plate is slidably connected to the inner wall of the tank body, a storage space for storing paint is provided between one side of the sealed push plate and the inside of the tank body, an outer baffle is provided on the inner wall of the tank body, the outer baffle is located on the side of the sealed push plate away from the storage space, a push plate spring is provided between the outer baffle and the sealed push plate, the two ends of the push plate spring are respectively abutted against the outer baffle and the sealed push plate, the outer baffle is provided with a pressure relief valve, the pressure relief valve comprises a valve body, and the valve body is provided with a trigger rod, an inlet, a reflux port, a filter assembly and a reset assembly. The present invention has the effect of reducing the impact of paint in the sealed tank, automatically relieving the pressure of the paint inside the sealed tank in time, and discharging the paint inside in time when the pressure inside the sealed tank rises rapidly.

Description

Technical Field

[0001] The invention relates to the field of paint transportation and storage equipment, in particular to a paint storage and transportation sealed can. Background Art

[0002] At present, paint is one of the most commonly used coatings. During its transportation, it is usually placed in large sealed barrels. Since paint is rich in various organic solvents and these solvents usually have a low flash point, it is more prone to fire. Transporters usually have to reinforce and fix the tanks containing paint to reduce fires caused by collisions.

[0003] In the process of transporting and storing paint, in addition to fires easily caused by static electricity generated by collision and friction, there may also be leakage caused by changes in temperature and internal pressure. After leakage, the paint will cause great harm to the environment, and the leaked paint will be exposed to open flames or static electricity and easily cause fire accidents. When the oil tank is soaked in rain or sea water, the paint bucket will also leak due to corrosion. In order to relieve the pressure inside the tank, the sealed tank for transporting and storing paint is usually equipped with a pressure relief hole or pressure relief valve that can be opened and closed in time, and the operator needs to manually relieve the pressure regularly to release the pressure inside the sealed tank.

[0004] Regarding the above-mentioned related technologies, one that is easily overlooked is the accumulation of static electricity caused by the paint repeatedly impacting the inner wall of the sealed can. In particular, when the transport vehicle accelerates or decelerates rapidly, the shaking of the internal paint causes the overall shaking of the transport vehicle to be greater, which in turn causes the transport vehicle to roll over and tip over during transportation. At the same time, the internal pressure rises due to the increase in temperature, and the internal pressure is difficult to control within an appropriate range, and the internal pressure cannot be fed back to the operator in a timely manner. Summary of the invention

[0005] In order to reduce the impact of paint in a sealed can, the paint inside the sealed can is automatically depressurized in time, and the paint inside is discharged in time when the pressure inside the sealed can rises rapidly, the present invention provides a sealed can for storing and transporting paint.

[0006] The present invention provides a sealed paint storage and transportation tank, which adopts the following technical solution:

[0007] A paint storage and transportation sealed tank is adopted, which includes a tank body, the inner wall of the tank body is slidably connected with a sealing push plate, a storage space for storing paint is provided between one side of the sealing push plate and the inside of the tank body, the tank body includes an outer baffle plate, the outer baffle plate is located at a side of the sealing push plate away from the storage space, a push plate spring is provided between the outer baffle plate and the sealing push plate, both ends of the push plate spring are respectively abutted against the outer baffle plate and the sealing push plate, the outer baffle plate is provided with a pressure relief valve, the pressure relief valve includes a valve body, the valve body is provided with a trigger rod, an inlet, a reflux port, a filter assembly and a reset assembly, the trigger rod is slidably connected to the valve body, the reset assembly makes one end of the trigger rod always abut against the sealing push plate, the valve body is provided with a three-way groove for connecting the inlet, the reflux port and the filter assembly, the inlet and the reflux port are both provided with a pipeline connected to the storage space, the connection between the pipeline and the sealing push plate is sealed, the trigger rod is circumferentially provided with a first conical groove, when the internal pressure of the storage space is too large, the first conical groove is located in the three-way groove, and the filter assembly is provided with a pressure relief port for gas discharge.

[0008] According to the above technical solution, when the pressure inside the storage space begins to rise, the sealing push plate is pushed outward, and at the same time the push plate spring will be compressed, and the distance between the sealing push plate and the outer baffle will become smaller, and the trigger rod will also move toward the inside of the valve body. When the pressure inside the storage space reaches the required pressure for pressure relief, the trigger rod will connect the inlet, the reflux port and the filter assembly, and the gas mixed with a small amount of paint will enter the valve body through the inlet pipe, and part of it will directly flow back to the storage space through the reflux pipe, and the remaining part will be filtered in the filter assembly, and the filtered liquid will return to the storage space through the reflux port, and the gas will be discharged from the tank through the pressure relief port. When the pressure inside the storage space decreases, the push plate spring will push the sealing push plate to move into the storage space. At this time, the reset assembly will push the trigger rod toward the sealing push plate to complete the closing of the pressure relief valve.

[0009] Optionally, the reset assembly includes a pre-stressed spring and a pre-tightening cover. The side of the valve body away from the sealing push plate is located on the outside of the outer baffle, and the pre-tightening cover is located on the side close to the outside of the valve body. The pre-tightening cover and the valve body are threadedly connected, and the pre-stressed spring is located between the trigger rod and the pre-tightening cover.

[0010] By adopting the above technical solution, the degree of screwing in of the pre-tightening cover is adjusted, and then the pre-tightening force of the pre-tightening spring is adjusted, and then the pressure required when the sealing push plate is pushed is adjusted, thereby adjusting the pressure value required for decompression inside the storage space.

[0011] Optionally, the valve body also includes an emergency pressure relief block, which is used to be threadedly connected to the pre-tightening cover, the valve body is provided with a groove for placing the emergency pressure relief block, a safety retaining ring is provided on the side of the emergency pressure relief block away from the trigger rod, the valve body is provided with a fixing ring for pressing the safety retaining ring against the emergency pressure relief block, the inner diameter of the fixing ring is larger than the outer diameter of the pre-tightening end cover, the trigger rod includes a trigger head, the trigger head is located on the side of the trigger rod close to the sealing baffle, the diameter of the trigger head is smaller than the diameter of the trigger rod body, a booster spring is provided on the outer side of the trigger head, and the valve body is provided with a booster shell for pressing the booster spring against the trigger rod, when the pressure in the storage space exceeds the maximum bearing pressure of the tank body, the emergency pressure relief block will destroy the safety retaining ring and push out the valve body.

[0012] By adopting the above technical scheme, when the internal pressure of the storage space rises rapidly, it will be difficult for the pressure relief valve to quickly relieve the internal gas in a short time. At this time, the sealing push plate will continue to move toward the outer baffle. At this time, the pressure at the pre-tightening cover will further increase, thereby pushing the emergency pressure relief block to further increase the pressure on the safety baffle ring. When the sealing push plate moves further toward the outer baffle, the emergency pressure relief will break the safety baffle ring, and the booster spring will assist in pushing the trigger rod and the emergency pressure relief block out of the valve body. The inlet will be directly connected to the outside of the valve body. At this time, the paint will be discharged directly from the inside of the valve body, effectively preventing the damage and explosion of the tank body caused by the sharp rise in internal pressure in the storage space.

[0013] Optionally, the trigger rod is provided with a second conical groove, which is located between the first conical groove and the pre-stressed spring. The elastic potential energy stored in the pre-stressed spring is greater than the elastic potential energy stored in the booster spring. When the internal pressure of the storage space is too low, the trigger rod slides along the valve body to the side close to the sealing push plate. The second conical groove is located at the three-way groove.

[0014] By adopting the above technical solution, since the force of the pre-compression spring is always greater than that of the booster spring, the trigger rod is always in contact with the sealing push plate. When there is no paint inside the storage space, that is, when the pressure in the internal storage space is too low, the sealing push plate will be at a position far away from the outer baffle. At this time, the second conical groove connects the three-way groove, and the reflux port and the inlet are connected to the filter assembly to achieve connection between the storage space and the outside, effectively achieving ventilation between the inside and outside of the tank body when the empty tank is placed for a long time, and effectively preventing debris from entering the storage space.

[0015] Optionally, the filter assembly also includes a filter housing, a filter element, a filter screen and a support frame, one end of the filter housing is fixedly connected to the valve body, the interior of the valve body is connected to the interior of the filter housing, a slot for fixing the support frame is provided at one end of the filter housing close to the valve body, the filter element is located on the inner side of the support frame, the support frame is provided with an interlayer, the filter screen is located in the interlayer, a plurality of support rings are provided on the outer side of the support frame, the support rings abut against the inner wall of the filter housing, an end cover is provided at one end of the filter housing away from the valve body, the end cover is provided with a top cone extending into the interior of the filter housing, the top cone abuts against the interior of the filter element, and a pressure relief port is provided on the side of the filter housing outside the tank body.

[0016] By adopting the above technical solution, when gas mixed with paint passes through the filter assembly, the paint will be filtered in two steps on the filter element and the filter screen. After filtering, the gas will be discharged through the pressure relief port provided on the filter housing, and the paint that has not passed through the filter element and the filter screen will also return to the storage space through the reflux port. By arranging a support frame on the support frame, the gas passing through the filter screen can be effectively discharged from the filter housing through the gap formed between the support frame and the filter housing.

[0017] Optionally, there is a closed chamber between the sealing push plate and the outer baffle plate, an air pressure sensor is provided inside the closed chamber, a sealing scraper is provided on the side of the sealing push plate close to the storage space, the sealing scraper is located at the edge of the sealing push plate, and a curved surface is provided on the side of the sealing scraper close to the storage space.

[0018] By adopting the above technical solution, the sealing push plate scrapes the paint on the inner wall of the storage space through the curved surface during the movement, effectively reducing the residual paint on the inner wall of the closed chamber after movement, and effectively improving the sealing of the closed chamber. The air pressure sensor can effectively reflect the pressure conditions inside the storage space through the air pressure changes inside the closed chamber. When the pressure inside the closed chamber increases, it proves that the pressure inside the storage space is increasing, which can effectively avoid contamination and measurement errors caused by the air pressure sensor contacting the paint.

[0019] Optionally, a pulley bracket is provided on one side of the sealing push plate close to the closed chamber, and several pulley brackets are provided along the circumference of the closed chamber. The pulley bracket includes a fixed rod and a movable rod. One end of the fixed rod is fixedly connected to the sealing push plate, and the other end of the fixed rod is hinged to the movable rod. A roller is provided at the end of the movable rod, and a tension spring is provided between the movable rod and the fixed rod. The tension spring ensures that the roller always keeps in contact with the inner wall of the tank body.

[0020] By adopting the above technical solution, when the sealing push plate moves, the roller is always in contact with the inner wall of the tank body. If the sealing push plate tilts during movement, the tension spring of the pulley bracket on the side of the sealing push plate tilted toward the inside of the storage space will be extended, making the pulley and the tank body abut with greater force, thereby effectively preventing the sealing push plate from tilting further.

[0021] Optionally, a plurality of wave-stopping baffles are provided in the storage space, the length direction of the wave-stopping baffles is the same as the width direction of the tank body, the wave-stopping baffles are fixedly connected to the inner wall of the tank body, the wave-stopping baffles are parallel to each other and are arranged along the length direction of the tank body, the area of ​​the wave-stopping baffles is 20% to 60% of the cross-section of the tank body, and the wave-stopping baffles are provided with a plurality of through holes, which connect the two sides of the wave-stopping baffles.

[0022] By adopting the above technical solution, when the sealed can is being transported, when braking or starting occurs, the paint inside will hit the adjacent wave-breaking baffle. Since the paint is divided into several different sections, the waves formed by a single impact will be reduced, making it difficult to form surges in the sealed can. The through holes can effectively facilitate the paint to be evenly distributed between the various wave-breaking baffles when filling the paint, effectively improving the stability during transportation.

[0023] In summary, the present invention includes at least one of the following beneficial technical effects:

[0024] When the pressure inside the storage space begins to rise, the sealing push plate is pushed outward, and at the same time the push plate spring will be compressed, and the distance between the sealing push plate and the outer baffle will become smaller, and the trigger rod will also move toward the inside of the valve body. When the pressure inside the storage space reaches the required pressure relief pressure, the trigger rod connects the inlet, the reflux port and the filter assembly, and the gas mixed with a small amount of paint will enter the valve body through the inlet pipeline, and part of it will directly flow back to the storage space through the reflux pipeline. The remaining part will be filtered in the filter assembly, and the filtered liquid will return to the storage space through the reflux port, and the gas will be discharged from the tank through the pressure relief port. When the pressure inside the storage space decreases, the push plate spring will push the sealing push plate to move into the storage space. At this time, the reset assembly pushes the trigger rod toward the sealing push plate to complete the closing of the pressure relief valve;

[0025] By adjusting the degree of screwing of the preload cover, the preload force of the preload spring is adjusted, and the pressure required when the sealing push plate is pushed is adjusted, so that the pressure value required for decompression inside the storage space can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic diagram of the overall structure of a sealed paint storage and transportation tank.

[0027] Figure 2 It is an overall top view.

[0028] Figure 3 yes Figure 2 Schematic diagram of the cross section of AA.

[0029] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0030] Figure 5 yes Figure 4 Schematic diagram of the enlarged portion B.

[0031] Figure 6 It is an exploded schematic diagram of the internal structure of the valve body.

[0032] Figure 7 It is a schematic diagram of the internal structure of the closed chamber without the tank body.

[0033] Figure 8 is an exploded view of the filter assembly.

[0034] Explanation of reference numerals: 1, tank body; 11, storage space; 12, wave-stopping baffle; 121, through hole; 2, sealing push plate; 21, push plate spring; 22, closed chamber; 23, sealing scraper; 3, outer baffle; 4, pressure relief valve; 41, valve body; 411, inlet; 412, reflux port; 42, filter assembly; 421, filter element; 422, filter screen; 423, support frame; 424, support ring; 425, top cone ; 426, pressure relief port; 43, trigger rod; 431, trigger head; 432, first conical groove; 433, second conical groove; 44, reset assembly; 441, preload spring; 442, preload cover; 45, emergency relief pressure block; 451, safety retaining ring; 452, fixing ring; 46, booster spring; 47, booster housing; 5, pulley bracket; 51, fixing rod; 52, movable rod; 53, tension spring; 54, roller. DETAILED DESCRIPTION

[0035] The embodiment of the invention discloses a sealed can for storing and transporting paint.

[0036] Reference Figures 1 to 7A sealed tank for storing and transporting paint comprises a tank body 1, wherein the inner wall of the tank body 1 is slidably connected with a sealing push plate 2, a storage space 11 for storing paint is provided between one side of the sealing push plate 2 and the inside of the tank body 1, the tank body 1 comprises an outer baffle plate 3, the outer baffle plate 3 is located on the side of the sealing push plate 2 away from the storage space 11, a push plate spring 21 is provided between the outer baffle plate 3 and the sealing push plate 2, the two ends of the push plate spring 21 are respectively abutted against the outer baffle plate 3 and the sealing push plate 2, the outer baffle plate 3 is provided with a pressure relief valve 4, the pressure relief valve 4 comprises a valve body 41, the valve body 41 is provided with a trigger rod 43, an inlet 411, a reflux port 412, and a filter assembly 42 and the reset assembly 44, the trigger rod 43 is slidably connected to the valve body 41, the reset assembly 44 makes one end of the trigger rod 43 always abut against the sealing push plate 2, the valve body 41 is provided with a three-way groove for connecting the inlet 411, the reflux port 412 and the filter assembly 42, the inlet 411 and the reflux port 412 are both provided with pipelines connected to the storage space 11, the connection between the pipeline and the sealing push plate 2 is sealed, the trigger rod 43 is circumferentially provided with a first conical groove 432, when the internal pressure of the storage space 11 is too large, the first conical groove 432 is located in the three-way groove, and the filter assembly 42 is provided with a pressure relief port 426 for gas discharge. When the pressure inside the storage space 11 begins to rise, the sealing push plate 2 is pushed outward, and at the same time the push plate spring 21 will be compressed, and the distance between the sealing push plate 2 and the outer baffle 3 will become smaller, and the trigger rod 43 will also move toward the inside of the valve body 41. When the pressure inside the storage space 11 reaches the required pressure for pressure relief, the trigger rod 43 connects the inlet 411, the reflux port 412 and the filter assembly 42, and the gas mixed with a small amount of paint will enter the valve body 41 through the inlet 411 pipeline, and part of it will directly flow back to the storage space 11 through the reflux port 412, and the remaining part will be filtered in the filter assembly 42, and the filtered liquid will return to the storage space 11 through the reflux port 412, and the gas will be discharged from the tank body 1 through the pressure relief port 426. When the pressure inside the storage space 11 decreases, the push plate spring 21 will push the sealing push plate 2 to move into the storage space 11. At this time, the reset assembly 44 pushes the trigger rod 43 toward the sealing push plate 2 to complete the closing of the pressure relief valve 4.

[0037] According to Figure 3 and Figure 4 In order to ensure the filtering effect of the pressure relief valve 4, the height of the inlet 411 should be higher than the height of the paint liquid level in the storage space 11. Therefore, during installation, the inlet 411 should be installed at a higher position in the tank body 1 as much as possible. In order to ensure that the paint does not leak from the storage space 11, the pipeline and the sealing push plate 2 are sealed.

[0038] Reference Figure 1 When the internal pressure of the storage space 11 increases, the pressure relief valve 4 opens to keep the internal air pressure within a range lower than the maximum pressure that the tank body 1 can withstand, thereby effectively achieving the internal pressure relief process.

[0039] Reference Figure 3 and Figure 4 In order to reset the trigger rod 43 in time and adjust the pressure for pressure relief, the reset assembly 44 includes a preload spring 441 and a preload cover 442. The side of the valve body 41 away from the sealing push plate 2 is located on the outside of the outer baffle 3. The preload cover 442 is located on the outer side close to the valve body 41. The preload cover 442 and the valve body 41 are threadedly connected. The preload spring 441 is located between the trigger rod 43 and the preload cover 442. The degree of screwing in of the preload cover 442 is adjusted, and then the preload force of the preload spring 441 is adjusted, and then the pressure required when the sealing push plate 2 is pushed is adjusted, so that the pressure value required for the internal pressure relief of the storage space 11 is adjusted.

[0040] Reference Figure 4 and Figure 5 When a fire occurs or the temperature remains high, it is difficult to effectively discharge the gas in the storage space 11 only through the pressure relief port 426. The paint sealed can that is under high pressure for a long time may be damaged and leak due to excessive pressure, thereby causing deflagration or explosion. In order to effectively avoid the above situation. The valve body 41 also includes an emergency pressure relief block 45, which is used to be threadedly connected to the pre-tightening cover 442. The valve body 41 is provided with a groove for placing the emergency pressure relief block 45. A safety retaining ring 451 is provided on the side of the emergency pressure relief block 45 away from the trigger rod 43. The valve body 41 is provided with a fixing ring 452 for pressing the safety retaining ring 451 on the emergency pressure relief block 45. The inner diameter of the fixing ring 452 is larger than the outer diameter of the pre-tightening end cover. The trigger rod 43 includes a trigger head 431, which is located on the side of the trigger rod 43 close to the sealing baffle. The diameter of the trigger head 431 is smaller than the diameter of the rod body of the trigger rod 43. A booster spring 46 is sleeved on the outer side of the trigger head 431. The valve body 41 is provided with a booster shell 47 for pressing the booster spring 46 on the trigger rod 43. When the pressure in the storage space 11 exceeds the maximum bearing pressure of the tank body 1, the emergency pressure relief block 45 destroys the safety retaining ring 451 and pushes out the valve body 41. When the internal pressure of the storage space 11 rises rapidly, the pressure relief valve 4 will find it difficult to quickly relieve the internal gas in a short time. At this time, the sealing push plate 2 will continue to move toward the outer baffle plate 3. At this time, the pressure at the pre-tightening cover 442 will further increase, thereby pushing the emergency pressure relief block 45 to further increase the pressure on the safety baffle ring 451. When the sealing push plate 2 moves further toward the outer baffle plate 3, the emergency pressure relief will break the safety baffle ring 451, and the booster spring 46 will assist in pushing the trigger rod 43 and the emergency pressure relief block 45 out of the valve body 41. The inlet 411 will be directly connected to the outside of the valve body 41. At this time, the paint will be directly discharged from the inside of the valve body 41, effectively preventing the tank body 1 from being damaged and exploded due to the sharp increase in the internal pressure of the storage space 11.

[0041] Reference Figure 4 and Figure 5 In order to facilitate the reuse of the damaged pressure relief valve 4, the present embodiment preferably installs the fixing ring 452 and the valve body 41 by means of a threaded connection. When the safety retaining ring 451 is damaged, the operator only needs to remove the fixing ring 452, and sequentially place the booster spring 46, the trigger rod 43, the pre-compression spring 441 and the emergency pressure relief block 45 into the valve body 41, and after replacing the new safety retaining ring 451, screw the fixing ring 452 to the corresponding position on the valve body 41.

[0042] Reference Figure 4 and Figure 5 When the sealed tank is not used for a long time, in order to effectively exchange gas between the inside of the tank body 1 and the outside, and reduce dust and debris from entering the inside of the tank body 1 through the filling port of the tank body 1. The trigger rod 43 is provided with a second tapered groove 433, and the second tapered groove 433 is located between the first tapered groove 432 and the preload spring 441. The elastic potential energy stored in the preload spring 441 is greater than the elastic potential energy stored in the booster spring 46. When the pressure inside the storage space 11 is too low, the trigger rod 43 slides along the valve body 41 to the side close to the sealing push plate 2, and the second tapered groove 433 is located at the three-way groove. Since the force of the preload spring 441 is always greater than that of the boost spring 46, the trigger rod 43 is always in contact with the sealing push plate 2. When there is no paint inside the storage space 11, that is, when the pressure in the internal storage space 11 is too low, the sealing push plate 2 will be at a position farther away from the outer baffle 3. At this time, the second conical groove 433 connects the three-way groove. At this time, the reflux port 412 and the inlet port 411 are connected to the filter assembly 42, thereby realizing the connection between the storage space 11 and the outside, effectively realizing the ventilation between the inside and the outside of the tank body 1 when the empty tank is placed for a long time, and effectively preventing debris from entering the storage space 11.

[0043] Reference Figure 3 and Figure 8The filter assembly 42 also includes a filter housing, a filter element 421, a filter screen 422 and a support frame 423. One end of the filter housing is fixedly connected to the valve body 41, and the interior of the valve body 41 is connected to the interior of the filter housing. An end of the filter housing close to the valve body 41 is provided with a slot for fixing the support frame 423. The filter element 421 is located on the inner side of the support frame 423. The support frame 423 is provided with an interlayer. The filter screen 422 is located in the interlayer. A plurality of support rings 424 are provided on the outer side of the support frame 423. The support rings 424 abut against the inner wall of the filter housing. An end cover is provided at the end of the filter housing away from the valve body 41. The end cover is provided with a top cone 425 extending toward the interior of the filter housing. The top cone 425 abuts against the interior of the filter element 421. A pressure relief port 426 is provided on the side of the filter housing outside the tank body 1. When gas mixed with paint passes through the filter assembly 42, the paint will be filtered in two steps on the filter element 421 and the filter screen 422. After filtering, the gas will be discharged through the pressure relief port 426 provided on the filter housing, and the paint that has not passed through the filter element 421 and the filter screen 422 will also return to the storage space 11 through the reflux port 412. By arranging a support frame 423 on the support frame 423, the gas passing through the filter screen 422 can be effectively discharged from the filter housing through the gap formed between the support frame 423 and the filter housing.

[0044] Reference Figure 8 The filter element 421 is fixed by using the top cone 425 to squeeze the filter element 421. A small range of deformation will occur at the contact point between the filter element 421 and the top cone 425, which effectively improves the sealing degree.

[0045] Reference Figure 3 , in order to allow the operator to observe the pressure changes inside the storage space 11 in time, and reduce the accuracy drop caused by the direct contact of the paint with the sensor. There is a closed chamber 22 between the sealing push plate 2 and the outer baffle plate 3. An air pressure sensor is arranged inside the closed chamber 22. A sealing scraper 23 is arranged on the side of the sealing push plate 2 close to the storage space 11. The sealing scraper 23 is located at the edge of the sealing push plate 2. A curved surface is arranged on the side of the sealing scraper 23 close to the storage space 11. During the movement of the sealing push plate 2, the paint on the inner wall of the storage space 11 is scraped by the curved surface, which effectively reduces the residual paint on the inner wall of the inner closed chamber 22 after the movement. Compared with the right-angled corner, the contact with the paint by the circular arc surface can reduce the intensity of the collision. The sealing of the closed chamber 22 is effectively improved.

[0046] Since the inside of the sealed chamber 22 is a sealed environment, and the space inside the sealed chamber 22 is much smaller than the storage space 11, when the sealing push plate 2 moves toward the sealed chamber 22, the air pressure change inside the sealed chamber 22 will be more obvious. The air pressure sensor can effectively reflect the pressure inside the storage space 11 through the air pressure change inside the sealed chamber 22. When the pressure inside the sealed chamber 22 increases, it proves that the pressure inside the storage space 11 is increasing. Since the air pressure sensor is arranged inside the sealed chamber 22, it can effectively avoid the air pressure sensor from contacting the paint, which causes contamination and measurement errors.

[0047] Since the sealing push plate 2 needs to move inside the tank body 1, it may be slightly skewed during the movement, thereby affecting the normal movement of the sealing push plate 2. In order to prevent the sealing push plate 2 from further skew and help the sealing push plate 2 return to its original position.

[0048] Reference Figure 3 and Figure 7 , in order to further guide and limit the sealing push plate 2. A pulley bracket 5 is provided on one side of the sealing push plate 2 close to the sealed chamber 22. The pulley bracket 5 is provided along the circumference of the sealed chamber 22. The pulley bracket 5 includes a fixed rod 51 and a movable rod 52. One end of the fixed rod 51 is fixedly connected to the sealing push plate 2, and the other end of the fixed rod 51 is hinged to the movable rod 52. A roller 54 is provided at the end of the movable rod 52. A tension spring 53 is provided between the movable rod 52 and the fixed rod 51. The tension spring 53 makes the roller 54 always keep in contact with the inner wall of the tank body 1. When the sealing push plate 2 moves, the roller 54 always abuts against the inner wall of the tank body 1. If the sealing push plate 2 tilts during the movement, the tension spring 53 of the pulley bracket 5 on the side of the sealing push plate 2 tilted toward the inside of the storage space 11 will be extended, so that the pulley and the tank body 1 are more strongly abutted, thereby effectively preventing the sealing push plate 2 from tilting further.

[0049] When vehicles transporting paint start and stop frequently, brake suddenly or start too fast, the paint inside will hit the inner wall of the sealed can, forming a surge inside the sealed can. The surge will cause the vehicle to shake in the length direction, resulting in prolonged braking time and difficulty in fixing the sealed can stably on the vehicle. It is necessary to eliminate the impact of surges on transportation as much as possible.

[0050] Reference Figure 3A plurality of wave-stopping baffles 12 are arranged in the storage space 11. The length direction of the wave-stopping baffles 12 is the same as the width direction of the tank body 1. The wave-stopping baffles 12 are fixedly connected to the inner wall of the tank body 1. The wave-stopping baffles 12 are parallel to each other and arranged along the length direction of the tank body 1. The area of ​​the wave-stopping baffles 12 is 20% to 60% of the cross section of the tank body 1. The wave-stopping baffles 12 are provided with a plurality of through holes 121, and the through holes 121 connect the two sides of the wave-stopping baffles 12. When the sealed tank is transported, when braking or starting occurs, the paint inside will hit the wave-stopping baffles 12 adjacent to it. Since the paint is divided into several different sections, the waves formed by a single collision will be reduced, making it difficult to form surges in the sealed tank. The through holes 121 can effectively facilitate the paint to be evenly distributed between the wave-stopping baffles 12 when filling the paint, effectively improving the stability during transportation.

[0051] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealed paint storage and transportation tank, comprising a tank body (1), characterized in that: The inner wall of the tank body (1) is slidably connected with a sealing push plate (2), a storage space (11) for storing paint is provided between one side of the sealing push plate (2) and the inside of the tank body (1), the tank body (1) comprises an outer baffle plate (3), the outer baffle plate (3) is located on the side of the sealing push plate (2) away from the storage space (11), a push plate spring (21) is provided between the outer baffle plate (3) and the sealing push plate (2), two ends of the push plate spring (21) are respectively abutted against the outer baffle plate (3) and the sealing push plate (2), the outer baffle plate (3) is provided with a pressure relief valve (4), the pressure relief valve (4) comprises a valve body (41), the valve body (41) is provided with a trigger rod (43), an inlet (411), a reflux port (412), a filter assembly (42) and a recirculation port (43). The trigger rod (43) is slidably connected to the valve body (41); the reset assembly (44) enables one end of the trigger rod (43) to always abut against the sealing push plate (2); the valve body (41) is provided with a three-way groove for connecting the inlet (411), the return port (412) and the filter assembly (42); the inlet (411) and the return port (412) are both provided with pipelines connected to the storage space (11); the connection between the pipeline and the sealing push plate (2) is sealed; the trigger rod (43) is circumferentially provided with a first conical groove (432); when the internal pressure of the storage space (11) is too large, the first conical groove (432) is located in the three-way groove; the filter assembly (42) is provided with a pressure relief port (426) for gas discharge.

2. A sealed paint storage and transportation can according to claim 1, characterized in that: The reset assembly (44) includes a preload spring (441) and a preload cover (442); the side of the valve body (41) away from the sealing push plate (2) is located on the outside of the outer baffle (3); the preload cover (442) is located on the outside of the valve body (41); the preload cover (442) and the valve body (41) are threadedly connected; the preload spring (441) is located between the trigger rod (43) and the preload cover (442).

3. A sealed paint storage and transportation can according to claim 2, characterized in that: The valve body (41) further comprises an emergency pressure relief block (45), the emergency pressure relief block (45) being threadedly connected to the preload cover (442), the valve body (41) being provided with a groove for accommodating the emergency pressure relief block (45), a safety baffle ring (451) being provided on a side of the emergency pressure relief block (45) away from the trigger rod (43), the valve body (41) being provided with a fixing ring (452) for pressing the safety baffle ring (451) onto the emergency pressure relief block (45), the inner diameter of the fixing ring (452) being larger than the outer diameter of the preload cover, and the trigger rod (43) comprising a trigger head (431), the trigger head (431) is located on a side of the trigger rod (43) close to the sealing baffle, the diameter of the trigger head (431) is smaller than the diameter of the trigger rod (43), a booster spring (46) is sleeved on the outer side of the trigger head (431), and the valve body (41) is provided with a booster shell (47) for pressing the booster spring (46) onto the trigger rod (43), when the pressure in the storage space (11) exceeds the maximum bearing pressure of the tank body (1), the emergency pressure relief block (45) destroys the safety baffle ring (451) and pushes out the valve body (41).

4. A sealed paint storage and transportation can according to claim 3, characterized in that: The trigger rod (43) is provided with a second conical groove (433), and the second conical groove (433) is located between the first conical groove (432) and the pre-compression spring (441). The elastic potential energy stored in the pre-compression spring (441) is greater than the elastic potential energy stored in the booster spring (46). When the internal pressure of the storage space (11) is too low, the trigger rod (43) slides along the valve body (41) to a side close to the sealing push plate (2), and the second conical groove (433) is located at the three-way groove.

5. A sealed paint storage and transportation can according to claim 4, characterized in that: The filter assembly (42) further comprises a filter housing, a filter element (421), a filter screen (422) and a support frame (423); one end of the filter housing is fixedly connected to the valve body (41); the interior of the valve body (41) is communicated with the interior of the filter housing; an end of the filter housing close to the valve body (41) is provided with a slot for fixing the support frame (423); the filter element (421) is located inside the support frame (423); the support frame (423) is provided with an interlayer; the filter screen (422) is located inside the interlayer; a plurality of support rings (424) are provided outside the support frame (423); the support rings (424) abut against the inner wall of the filter housing; an end of the filter housing away from the valve body (41) is provided with an end cover; the end cover is provided with a top cone (425) extending toward the interior of the filter housing; the top cone (425) abuts against the interior of the filter element (421); and a pressure relief port (426) is provided on a side of the filter housing that is outside the tank body (1).

6. A sealed paint storage and transportation can according to claim 5, characterized in that: A sealed chamber (22) is provided between the sealing push plate (2) and the outer baffle plate (3), an air pressure sensor is provided inside the sealed chamber (22), a sealing scraper (23) is provided on the side of the sealing push plate (2) close to the storage space (11), the sealing scraper (23) is located at the edge of the sealing push plate (2), and a curved surface is provided on the side of the sealing scraper (23) close to the storage space (11).

7. A sealed paint storage and transportation can according to claim 6, characterized in that: A pulley bracket (5) is provided on one side of the sealing push plate (2) close to the sealed chamber (22). The pulley bracket (5) is provided with a plurality of pulley brackets (5) along the circumference of the sealed chamber (22). The pulley bracket (5) comprises a fixed rod (51) and a movable rod (52). One end of the fixed rod (51) is fixedly connected to the sealing push plate (2), and the other end of the fixed rod (51) is hinged to the movable rod (52). A roller (54) is provided at the end of the movable rod (52). A tension spring (53) is provided between the movable rod (52) and the fixed rod (51). The tension spring (53) enables the roller (54) to always maintain contact with the inner wall of the tank body (1).

8. A sealed paint storage and transportation can according to claim 1, characterized in that: A plurality of wave-stopping baffles (12) are arranged in the storage space (11); the length direction of the wave-stopping baffles (12) is the same as the width direction of the tank body (1); the wave-stopping baffles (12) are fixedly connected to the inner wall of the tank body (1); the wave-stopping baffles (12) are parallel to each other and arranged along the length direction of the tank body (1); the area of ​​the wave-stopping baffles (12) is 20% to 60% of the cross section of the tank body (1); the wave-stopping baffles (12) are provided with a plurality of through holes (121); and the through holes (121) connect two sides of the wave-stopping baffles (12).

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