A powder tank truck tank multi-paw claw type tank cover and a method of using the same

Abstract

The application discloses a powder tank truck tank body multi-claw pawl type tank cover and a use method thereof, and relates to the technical field of powder tank truck tank covers. The tank cover comprises a cover body, a connecting seat, a plurality of fixing seats and a plurality of lock catch assemblies. The connecting seat is arranged at the bottom of the cover body and has an annular structure. A rotating shaft is rotationally connected to the inner side wall of the connecting seat and penetrates through the top of the cover body. The plurality of fixing seats are equidistantly arranged on the side wall of the connecting seat. Each fixing seat has the lock catch assembly rotationally arranged on the side wall thereof. The lock catch assembly is used for locking the cover body in cooperation with the fixing seat. When the internal air pressure of the tank body is too high, the piston plate is moved by the internal air pressure of the tank body, the limiting rod enters the limiting hole, the rotation of the rotating shaft is limited by the limiting rod and the limiting hole, and the unlocking operation of the cover body is prohibited, so that the probability of safety accidents can be greatly reduced when the tank cover is applied.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder tank truck tank covers, in particular to a powder tank truck tank body multi-claw pawl type tank cover and a use method thereof. BACKGROUND

[0002] The powder tank truck is suitable for transporting particulate materials such as fly ash, cement and lime powder. During transportation, the powder tank is irradiated by the sun for a long time, so that the internal temperature of the powder tank is relatively high. Due to the principle of thermal expansion and cold contraction, the air pressure inside the powder tank is relatively high. Therefore, during loading and unloading, the air pressure inside the powder tank needs to be observed through an air pressure gauge to ensure the safety of the powder tank.

[0003] A self-sealing manhole cover for a bulk powder tank truck is disclosed in Chinese patent CN100540415C. The manhole cover is mainly composed of a manhole cover ring, a top cover and a fixed pressure plate which are welded together, and a rubber ring fixed below the fixed pressure plate by bolts, nuts and a pressure ring. The rubber ring is composed of an upper wing surface with a rectangular cross section, a side vertical surface with a rectangular cross section, and a lower wing surface with an equal thickness and an outer extension edge. The overall cross section of the rubber ring is inverted J-shaped. The upper wing surface is connected to the side vertical surface through a right angle. The side vertical surface is connected to the inner side edge of the lower wing surface through a reverse angle. A sealing convex is arranged at the lower end of the inner side edge of the lower wing surface.

[0004] In the technical solution, the following deficiencies exist:

[0005] Although the self-weight of the cover body can generate a large contact pressure between the sealing member and the cover body in the technical solution, ensuring the sealing between the cover body and the tank body, no pressure relief mechanism is provided in the technical solution. Therefore, in the pressure relief process, the pressure relief mechanism of the tank body still completes the pressure relief work. However, in actual operation, the operator often ignores the reading of the air pressure gauge and directly opens the cover body. Therefore, in actual use, when the air pressure inside the tank body is high, directly opening the cover body can cause safety accidents. SUMMARY

[0006] The present application aims to provide a powder tank truck tank body multi-claw pawl type tank cover and a use method thereof, to solve the technical problems that the cover body cannot be completely locked according to the air pressure inside the tank body, and does not have a quick pressure relief function.

[0007] In one aspect, the present application provides a powder tank truck tank body multi-claw pawl type tank cover, comprising:

[0008] a cover body;

[0009] a connecting seat, the connecting seat being arranged at the bottom of the cover body, the connecting seat being annular in structure, a rotating shaft being rotatably connected to the inner side wall of the connecting seat, and the rotating shaft penetrating through the top of the cover body;

[0010] A plurality of fixed seats are equidistantly arranged on the side wall of the connecting seat, a lock catch assembly is rotatably arranged on each fixed seat side wall, the lock catch assembly is used for cooperating with the fixed seat to lock the cover body, a cavity is arranged in each fixed seat, and a limiting assembly is arranged in each cavity, and the limiting assembly is used for limiting rotation of the rotating shaft;

[0011] The limiting assembly comprises:

[0012] A piston plate is slidably arranged in the cavity, a limiting rod is arranged on one side of the piston plate, and the limiting rod penetrates the fixed seat side wall;

[0013] An L-shaped hole is arranged on the fixed seat side wall, and the L-shaped hole and the cavity are communicated;

[0014] A plurality of limiting holes are equidistantly arranged on the rotating shaft side wall, and the plurality of limiting holes and the plurality of limiting rods are in one-to-one correspondence, and a circular hole is arranged on the connecting seat side wall close to the limiting hole;

[0015] A pressure relief assembly is slidably arranged on the rotating shaft side wall, and the pressure relief assembly is arranged on the top of the cover body.

[0016] Preferably, the pressure relief assembly comprises:

[0017] A second spring is arranged on one side of the piston plate, and the second spring is connected with the inner side wall of the cavity.

[0018] Preferably, the lock catch assembly comprises:

[0019] A movable seat is rotatably connected with the fixed seat;

[0020] A lock catch is arranged on the movable seat side wall, and a groove is arranged on one end of the fixed seat close to the lock catch;

[0021] A transmission assembly is rotatably connected with the movable seat, and the transmission assembly is used for driving the movable seat to rotate.

[0022] Preferably, the transmission assembly comprises:

[0023] A transmission seat is provided with a threaded hole on the top, a lead screw is arranged in the threaded hole, and the lead screw is fixed with the rotating shaft;

[0024] A connecting block is arranged on the side wall of the transmission seat, a connecting hole is arranged on the side wall of the connecting block, a shaft body is slidably arranged in the connecting hole, and the shaft body is rotatably connected with the movable seat.

[0025] Preferably, the pressure relief assembly comprises:

[0026] A sealing cover is arranged on the rotating shaft side wall, a plurality of protrusions are arranged on the sealing cover above the cover body, and the sealing cover is connected to the rotating shaft through the protrusions and the rotating shaft sliding connection;

[0027] A plurality of air release grooves are equidistantly arranged on the inner wall of the sealing cover;

[0028] A sealing block is arranged on the inner wall of the top of the sealing cover, the sealing block is a circular truncated cone structure, and a sealing groove adapted to the sealing block is arranged on the top of the rotating shaft;

[0029] A pressure relief pipe is arranged at the bottom of the sealing block, and the pressure relief pipe penetrates the rotating shaft, the lead screw and the transmission seat.

[0030] Preferably, it further comprises:

[0031] A plurality of through holes are equidistantly arranged on the side wall of the pressure relief pipe close to the rotating shaft;

[0032] A support plate is arranged at the bottom of the side wall of the pressure relief pipe, and a first spring is arranged on the top of the support plate, and the first spring is fixed with the transmission seat;

[0033] A filter seat is arranged at the bottom of the pressure relief pipe, and the filter seat is communicated with the pressure relief pipe.

[0034] Preferably, it further comprises:

[0035] A connecting frame is arranged, which is a Y-shaped structure, and the connecting frame is rotatably connected with the sealing cover;

[0036] A Y-shaped hole is arranged in the connecting frame;

[0037] Two rectangular grooves are arranged on the side wall of the connecting frame, and a support plate is slidably connected in each of the two rectangular grooves;

[0038] Two connecting rods are arranged on the side walls of the two support plates respectively, and a piston block is arranged at one end of each of the two connecting rods, and the two piston blocks are slidably connected with the Y-shaped hole.

[0039] Preferably, a connecting pipe is arranged in one of the cavities, the connecting pipe penetrates the top of the cover body, a hose is arranged at the end of the connecting pipe, the hose is communicated with the Y-shaped hole, and a handle is fixed on one side of the connecting frame.

[0040] Preferably, it further comprises:

[0041] An annular seat is arranged, and a plurality of equidistantly distributed fixing blocks are arranged on the inner wall of the annular seat;

[0042] A locking ring is fixed on the fixing block.

[0043] Another aspect of the present application provides a method for using the multi-claw pawl type tank cover of the tank body of a powder tank truck, comprising the following steps:

[0044] Step one: during installation, the annular seat is welded at the tank opening of the tank body of the powder tank truck, and the sealing between the annular seat and the tank body is ensured, then the cover body is placed on top of the annular seat, at this time the groove on the fixed seat and the lock ring on the annular seat are in contact;

[0045] Step two: when locking the cover body, the handle is rotated, the sealing cover is rotated by the connecting frame when the handle is rotated, the sealing cover drives the rotating shaft to rotate through the action of the protruding block, and the rotating shaft drives the lead screw to rotate, the lead screw is rotated to cooperate with the threaded groove on the transmission seat, and the transmission seat is driven to descend, the shaft body is driven to descend by the connecting block when the transmission seat is descended, the shaft body and the connecting hole are slid, and the shaft body and the movable seat are rotated, so that the movable seat is rotated around the connecting point of the movable seat and the fixed seat, the lock catch on the movable seat is close to the groove on the fixed seat, and the cover body and the annular seat are locked through the lock ring, the groove on the fixed seat and the lock catch;

[0046] Step three: when opening the cover body, when the gas pressure in the tank body is large, the gas in the tank body enters the cavity through the L-shaped hole, the piston plate is moved, and the second spring is compressed, when the gas pressure in the tank body is too large, the distance that the piston plate moves is increased, at this time the piston plate pushes the limiting rod to pass through the circular hole and enter the limiting hole of the rotating shaft, and the piston plate moves to the other side of the connecting pipe, the limiting rod and the limiting hole limit the rotation of the rotating shaft, at this time the rotating shaft cannot be rotated by the handle, and the cover body cannot be directly opened;

[0047] Step four: after the piston plate moves to one side of the connecting pipe, the gas in the tank body enters the Y-shaped hole of the connecting frame through the connecting pipe and the hose, the piston block is moved, and the support plate is pushed out of the rectangular groove through the connecting rod, at this time the connecting rod cannot be easily retracted into the Y-shaped hole due to the large gas pressure in the tank body, at this time the connecting frame is rotated around the sealing cover by the handle, and since the support plate slides out of the rectangular groove at this time, the support plate and the cover body are in contact during the rotation of the connecting frame, and the sealing cover is pushed up along the rotating shaft;

[0048] Step five: the sealing cover is raised to drive the sealing block away from the sealing groove on the rotating shaft, and the pressure relief pipe is raised, when the through hole on the pressure relief pipe enters the sealing groove, since the sealing groove is a circular truncated cone structure, at this time the gas in the tank body enters the pressure relief pipe through the filter seat, and is then output through the through hole, and is then output to the external environment through the air outlet groove on the sealing cover, so that the gas pressure in the tank body is reduced.

[0049] Compared with the prior art, the present application has the following beneficial effects:

[0050] (1) By setting up a cavity, piston plate, limiting rod, limiting hole and L-shaped hole, the present invention can realize that when the internal air pressure of the tank is too high, the internal air pressure of the tank pushes the piston plate to move, so that the limiting rod enters the limiting hole. The limiting rod and limiting hole limit the rotation of the rotating shaft, thereby preventing the unlocking operation of the cover. This makes the probability of safety accidents greatly reduced when the cover is used.

[0051] (2) The present invention, through the provided protrusion, connecting pipe, hose, Y-shaped hole, piston block, connecting rod and support plate, can achieve the following: when the gas pressure inside the tank is too high, the piston plate moves to the side of the connecting pipe, and the gas inside the tank enters the Y-shaped hole of the connecting frame through the connecting pipe and hose, pushing the piston block to move, and then pushing the support plate out of the rectangular groove through the connecting rod. At this time, rotating the connecting frame can push the connecting frame to rise to a certain height through the force between the support plate and the cover, thereby driving the pressure relief pipe to rise. When the through hole on the pressure relief pipe enters the sealing groove, the gas inside the tank is output to the external environment through the filter seat, pressure relief pipe, through hole and venting groove, so that the gas inside the tank can be output when the cover is locked, realizing safe and fast pressure relief. When the gas pressure inside the tank is at a safe value, under the action of the second spring, the piston plate is pushed to reset, releasing the rotation restriction of the rotating shaft, and thus completing the opening of the cover. Attached Figure Description

[0052] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0053] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0054] Figure 2 This is a schematic diagram of the transmission seat, connecting block, and movable seat of the present invention;

[0055] Figure 3 This is a schematic diagram of the annular seat, fixing block, and locking ring structure of the present invention;

[0056] Figure 4 This is a schematic diagram of the connecting seat and fixing seat structure of the present invention;

[0057] Figure 5 This is a schematic diagram of the connecting seat and rotating shaft structure of the present invention;

[0058] Figure 6 This is a schematic diagram of the sealing structure and the exploded structure of the rotating shaft of the present invention;

[0059] Figure 7 This is a cross-sectional view of the connecting frame portion of the present invention;

[0060] Figure 8 This is a schematic diagram of the exploded structure of the connecting seat, rotating shaft, pressure relief pipe and first spring of the present invention;

[0061] Figure 9 This is an exploded structural diagram of the pressure relief pipe and rotating shaft of the present invention;

[0062] Figure 10 This is a schematic cross-sectional view of the side portion of the fixing seat of the present invention;

[0063] Figure 11 This is a schematic diagram of the sealing cap and venting groove structure of the present invention.

[0064] Figure label:

[0065] 101. Cover; 102. Handle; 103. Annular seat; 104. Fixing block; 105. Locking ring; 201. Connecting frame; 202. Sealing cover; 203. Y-shaped hole; 204. Piston block; 205. Connecting rod; 206. Support plate; 207. Vent groove; 301. Fixing seat; 302. Movable seat; 303. Lock; 304. Connecting block; 305. Transmission seat; 306. Connecting seat; 307, rotating shaft; 308, lead screw; 309, round hole; 310, limiting hole; 401, pressure relief pipe; 402, first spring; 403, filter seat; 404, support plate; 405, sealing block; 406, through hole; 501, hose; 502, cavity; 503, piston plate; 504, second spring; 505, limiting rod; 506, L-shaped hole; 507, connecting pipe. Detailed Implementation

[0066] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0067] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0068] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0071] The following is combined with Figures 1 to 11 As shown, one aspect of the present invention provides a multi-claw type tank cover for a powder tanker truck, comprising:

[0072] Cover 101;

[0073] Connecting seat 306 is located at the bottom of cover 101. Connecting seat 306 has a ring structure. A rotating shaft 307 is rotatably connected to the inner side wall of connecting seat 306 and the rotating shaft 307 passes through the top of cover 101.

[0074] Multiple fixing seats 301 are equidistantly arranged on the side wall of the connecting seat 306. Each fixing seat 301 has a locking assembly rotatably mounted on its side wall. The locking assembly is used to lock the cover 101 in conjunction with the fixing seat 301. Each fixing seat 301 has a cavity 502. Each cavity 502 is provided with a limiting assembly, which is used to limit the rotation of the rotating shaft 307.

[0075] The limiting components include:

[0076] Piston plate 503 is slidably disposed in cavity 502. A limiting rod 505 is provided on one side of piston plate 503 and the limiting rod 505 penetrates the side wall of fixed seat 301.

[0077] L-shaped hole 506 is formed on the side wall of the fixed base 301, and L-shaped hole 506 is connected to cavity 502.

[0078] Multiple limiting holes 310 are equally spaced on the side wall of the rotating shaft 307, and the multiple limiting holes 310 correspond one-to-one with the multiple limiting rods 505. The side wall of the connecting seat 306 is provided with round holes 309 near the limiting holes 310.

[0079] The pressure relief assembly is slidably mounted on the side wall of the rotating shaft 307 and is located on the top of the cover 101.

[0080] When the internal air pressure of the tank is high, the gas inside the tank enters the cavity 502 through the L-shaped hole 506, pushing the piston plate 503 to move. The piston plate 503 drives the limiting rod 505 and the limiting hole 310 to restrict the rotating shaft 307. The rotating shaft 307 is automatically locked by the air pressure inside the tank, thereby preventing the staff from directly opening the cover 101 and minimizing the possibility of safety accidents.

[0081] Furthermore, it also includes:

[0082] The second spring 504 is disposed on one side of the piston plate 503 and is connected to the inner wall of the cavity 502.

[0083] By contracting the second spring 504, the piston plate 503 can drive the limiting rod 505 into the limiting hole 310 only when the air pressure inside the can is high enough, that is, when the second spring 504 is compressed to its limit. This prevents the lid 101 from being easily and completely locked, thus improving the practicality of the can lid.

[0084] Furthermore, the locking assembly includes:

[0085] Movable seat 302, which is rotatably connected to fixed seat 301;

[0086] The latch 303 is located on the side wall of the movable seat 302, and the fixed seat 301 has a groove at the end near the latch 303.

[0087] The transmission assembly is rotatably connected to the movable seat 302, and the transmission assembly is used to drive the movable seat 302 to rotate.

[0088] The transmission components include:

[0089] The transmission seat 305 has a threaded hole at its top, and a lead screw 308 is installed in the threaded hole. The lead screw 308 and the rotating shaft 307 are fixed together.

[0090] A connecting block 304 is provided on the side wall of the transmission seat 305. A connecting hole is provided on the side wall of the connecting block 304. A shaft is slidably provided in the connecting hole, and the shaft is rotatably connected to the movable seat 302.

[0091] When the rotating shaft 307 rotates, it drives the lead screw 308 to rotate. When the lead screw 308 rotates, it engages with the threaded groove on the transmission seat 305 to drive the transmission seat 305 to descend. When the transmission seat 305 descends, it drives the shaft to descend through the connecting block 304. Through the sliding between the shaft and the connecting hole and the rotation between the shaft and the movable seat 302, the movable seat 302 rotates around the connection point between the movable seat 302 and the fixed seat 301, so that the latch 303 on the movable seat 302 approaches the groove on the fixed seat 301. The cover 101 and the ring seat 103 are locked through the locking ring 105, the groove on the fixed seat 301 and the latch 303.

[0092] Furthermore, the pressure relief assembly includes:

[0093] A sealing cover 202 is provided on the side wall of the rotating shaft 307. Multiple protrusions are provided on the side wall of the rotating shaft 307 above the cover body 101. The sealing cover 202 is slidably connected to the rotating shaft 307 through the protrusions.

[0094] Multiple venting grooves 207 are equally spaced on the inner wall of the sealing cover 202;

[0095] The sealing block 405 is set on the inner top wall of the sealing cover 202. The sealing block 405 has a frustum structure. The top of the rotating shaft 307 is provided with a sealing groove that matches the sealing block 405.

[0096] Pressure relief pipe 401 is located at the bottom of sealing block 405 and passes through rotating shaft 307, lead screw 308 and transmission seat 305.

[0097] Also includes:

[0098] Multiple through holes 406 are equally spaced on the side wall of the pressure relief pipe 401 near the rotating shaft 307.

[0099] Support plate 404 is provided at the bottom of the side wall of pressure relief pipe 401, and a first spring 402 is provided at the top of support plate 404, and the first spring 402 is fixed to transmission seat 305.

[0100] The filter seat 403 is located at the bottom of the pressure relief pipe 401 and is connected to the pressure relief pipe 401.

[0101] After the pressure relief pipe 401 rises a certain distance, the through hole 406 on the pressure relief pipe 401 enters the sealing groove. Since the sealing groove is a frustum structure, the gas inside the tank enters the pressure relief pipe 401 through the filter seat 403, and then exits through the through hole 406. It is then output to the external environment through the venting groove 207 on the sealing cover 202, reducing the internal air pressure of the tank. Through the first spring 402 and the support plate 404, the pressure relief pipe 401 has a downward movement tendency, which in turn drives the sealing block 405 to tightly adhere to the sealing groove on the rotating shaft 307, thereby achieving the sealing of the pressure relief pipe 401.

[0102] Furthermore, it also includes:

[0103] Connecting frame 201, the connecting frame 201 has a Y-shaped structure, and the connecting frame 201 and the sealing cover 202 are rotatably connected;

[0104] Y-shaped hole 203, the Y-shaped hole 203 is formed in the connecting bracket 201;

[0105] Two rectangular slots are provided on the side wall of the connecting frame 201, and support plates 206 are slidably connected in both rectangular slots.

[0106] Two connecting rods 205 are respectively installed on the side walls of the two support plates 206. One end of each connecting rod 205 is provided with a piston block 204, and both piston blocks 204 are slidably connected to the Y-shaped hole 203.

[0107] A connecting pipe 507 is provided in one of the cavities 502, and the connecting pipe 507 passes through the top of the cover 101. A flexible hose 501 is provided at the end of the connecting pipe 507, and the flexible hose 501 is connected to the Y-shaped hole 203. A handle 102 is fixed on one side of the connecting frame 201.

[0108] When the internal pressure of the tank reaches a certain level, the piston plate 503 moves to the side of the connecting pipe 507. The gas inside the tank enters the Y-shaped hole 203 of the connecting frame 201 through the connecting pipe 507 and the hose 501, pushing the piston block 204 to move. Then, the connecting rod 205 pushes the support plate 206 out of the rectangular groove. Because the internal pressure of the tank is too high at this time, the connecting rod 205 cannot easily retract into the Y-shaped hole 203. At this time, the handle 102 drives the connecting frame 201 to rotate around the sealing cover 202. Since the support plate 206 slides out of the rectangular groove at this time, the support plate 206 contacts the cover 101 during the rotation of the connecting frame 201, pushing the sealing cover 202 to rise along the rotating shaft 307, which in turn drives the pressure relief pipe 401 to rise, thus performing pressure relief.

[0109] Furthermore, it also includes:

[0110] The annular seat 103 has multiple equally spaced fixing blocks 104 on its inner sidewall;

[0111] Locking ring 105 is fixed on fixing block 104.

[0112] Another aspect of the present invention provides a method for using a multi-claw type tank cover for a powder tanker truck, comprising the following steps:

[0113] Step 1: During installation, weld the annular seat 103 to the tank opening of the powder tanker and ensure the seal between the annular seat 103 and the tank. Then place the cover 101 on top of the annular seat 103. At this time, the groove on the fixing seat 301 and the locking ring 105 on the annular seat 103 are in contact.

[0114] Step 2: When locking the cover 101, rotate the handle 102. When the handle 102 rotates, it drives the sealing cover 202 to rotate through the connecting bracket 201. Through the action of the protrusion, the sealing cover 202 drives the rotating shaft 307 to rotate, which in turn drives the lead screw 308 to rotate. When the lead screw 308 rotates, it engages with the threaded groove on the transmission seat 305 to drive the transmission seat 305 to descend. When the transmission seat 305 descends, it drives the shaft to descend through the connecting block 304. Through the sliding between the shaft and the connecting hole and the rotation between the shaft and the movable seat 302, the movable seat 302 rotates around the connection point between the movable seat 302 and the fixed seat 301, so that the latch 303 on the movable seat 302 approaches the groove on the fixed seat 301. The cover 101 and the ring seat 103 are locked through the locking ring 105, the groove on the fixed seat 301 and the latch 303.

[0115] Step 3: When the lid 101 is opened, if the internal air pressure of the can is high, the gas inside the can enters the cavity 502 through the L-shaped hole 506, pushing the piston plate 503 to move and compressing the second spring 504. When the internal air pressure of the can is too high, the piston plate 503 moves a greater distance. At this time, the piston plate 503 pushes the limiting rod 505 through the round hole 309 and into the limiting hole 310 of the rotating shaft 307. At the same time, the piston plate 503 moves to the other side of the connecting pipe 507. The limiting rod 505 and the limiting hole 310 restrict the rotation of the rotating shaft 307. At this time, the rotating shaft 307 cannot be rotated by the handle 102, thus preventing the lid 101 from being opened directly. This achieves the goal of preventing the lid 101 from being unlocked, which greatly reduces the probability of safety accidents when the lid is used.

[0116] Step 4: After the piston plate 503 moves to the side of the connecting pipe 507, the gas inside the tank enters the Y-shaped hole 203 of the connecting frame 201 through the connecting pipe 507 and the hose 501, pushing the piston block 204 to move, and then pushing the support plate 206 out of the rectangular groove through the connecting rod 205. Since the gas pressure inside the tank is too high at this time, the connecting rod 205 cannot easily retract into the Y-shaped hole 203. At this time, the handle 102 drives the connecting frame 201 to rotate around the sealing cover 202. Since the support plate 206 slides out of the rectangular groove at this time, the support plate 206 contacts the cover 101 during the rotation of the connecting frame 201, pushing the sealing cover 202 to rise along the rotating shaft 307.

[0117] Step 5: The sealing cover 202 rises, causing the sealing block 405 to leave the sealing groove on the rotating shaft 307, and also causing the pressure relief pipe 401 to rise. When the through hole 406 on the pressure relief pipe 401 enters the sealing groove, since the sealing groove is a frustum structure, the gas inside the tank enters the pressure relief pipe 401 through the filter seat 403, and then exits through the through hole 406, and is output to the external environment through the venting groove 207 on the sealing cover 202, thereby reducing the internal gas pressure of the tank.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-claw type tank cover for a powder tanker truck, characterized in that, include: Cover (101); A connecting seat (306) is provided at the bottom of the cover (101). The connecting seat (306) is a ring structure. A rotating shaft (307) is rotatably connected to the inner side wall of the connecting seat (306), and the rotating shaft (307) passes through the top of the cover (101). Multiple fixing seats (301) are equidistantly arranged on the side wall of the connecting seat (306). Each fixing seat (301) has a locking assembly rotatably arranged on its side wall. The locking assembly is used to cooperate with the fixing seat (301) to lock the cover (101) onto the annular seat (103) at the tank opening of the powder tanker. Each fixing seat (301) has a cavity (502) and each cavity (502) has a limiting component. The limiting component is used to limit the rotation of the rotating shaft (307). The limiting component includes: A piston plate (503) is slidably disposed in a cavity (502). A limiting rod (505) is provided on one side of the piston plate (503), and the limiting rod (505) penetrates the side wall of the fixed seat (301). L-shaped hole (506), the L-shaped hole (506) is opened on the side wall of the fixed base (301), and the L-shaped hole (506) is connected to the cavity (502); Multiple limiting holes (310) are equally spaced on the side wall of the rotating shaft (307), and the multiple limiting holes (310) correspond one-to-one with the multiple limiting rods (505). The side wall of the connecting seat (306) is provided with round holes (309) near the limiting holes (310). A pressure relief assembly is slidably disposed on the side wall of the rotating shaft (307) and is located on the top of the cover (101); The locking assembly includes: a movable seat (302), which is rotatably connected to a fixed seat (301); The latch (303) is disposed on the side wall of the movable seat (302), and the fixed seat (301) has a groove at one end near the latch (303); A transmission assembly is rotatably connected to the movable seat (302), and the transmission assembly is used to drive the movable seat (302) to rotate; The transmission assembly includes: a transmission seat (305), the top of which is provided with a threaded hole, a lead screw (308) is provided in the threaded hole, and the lead screw (308) and the rotating shaft (307) are fixed. A connecting block (304) is provided on the side wall of the transmission seat (305). A connecting hole is provided on the side wall of the connecting block (304). A shaft is slidably provided in the connecting hole, and the shaft is rotatably connected to the movable seat (302).

2. The multi-claw type tank cover for a powder tanker truck according to claim 1, characterized in that, Also includes: The second spring (504) is disposed on one side of the piston plate (503) and is connected to the inner wall of the cavity (502).

3. The multi-claw type tank cover for a powder tanker truck according to claim 2, characterized in that, The pressure relief assembly includes: a sealing cover (202), which is disposed on the side wall of the rotating shaft (307). The side wall of the rotating shaft (307) is provided with a plurality of protrusions above the cover body (101). The sealing cover (202) is slidably connected to the rotating shaft (307) through the protrusions. Multiple venting grooves (207) are provided at equal intervals on the inner wall of the sealing cover (202); A sealing block (405) is provided on the inner top wall of the sealing cover (202). The sealing block (405) has a frustum structure. A sealing groove adapted to the sealing block (405) is provided on the top of the rotating shaft (307). Pressure relief pipe (401) is provided at the bottom of sealing block (405) and passes through rotating shaft (307), lead screw (308) and transmission seat (305).

4. A multi-claw type tank cover for a powder tanker truck according to claim 3, characterized in that, Also includes: Multiple through holes (406) are provided at equal intervals on the side wall of the pressure relief pipe (401) near the rotating shaft (307); A support plate (404) is provided at the bottom of the side wall of the pressure relief pipe (401), and a first spring (402) is provided at the top of the support plate (404), and the first spring (402) is fixed to the transmission seat (305); A filter seat (403) is provided at the bottom of the pressure relief pipe (401), and the filter seat (403) and the pressure relief pipe (401) are connected.

5. A multi-claw type tank cover for a powder tanker truck according to claim 4, characterized in that, Also includes: A connecting frame (201) is Y-shaped and is rotatably connected to a sealing cover (202). Y-shaped hole (203), the Y-shaped hole (203) is formed in the connecting bracket (201); Two rectangular slots are formed on the side wall of the connecting frame (201), and a support plate (206) is slidably connected in each of the two rectangular slots; Two connecting rods (205) are respectively set on the side walls of two support plates (206). One end of each connecting rod (205) is provided with a piston block (204), and both piston blocks (204) are slidably connected to the Y-shaped hole (203).

6. A multi-claw type tank cover for a powder tanker truck according to claim 5, characterized in that, A connecting pipe (507) is provided in one of the cavities (502), and the connecting pipe (507) passes through the top of the cover (101). A flexible hose (501) is provided at the end of the connecting pipe (507), and the flexible hose (501) communicates with the Y-shaped hole (203). A handle (102) is fixed on one side of the connecting frame (201).

7. A method of using a multi-claw clamp-type tank cover for a powder tanker truck, comprising the multi-claw clamp-type tank cover for a powder tanker truck as described in claim 6, characterized in that, Includes the following steps: Step 1. During installation, weld the annular seat (103) to the tank opening of the powder tanker and ensure the sealing between the annular seat (103) and the tank. Then place the cover (101) on top of the annular seat (103). At this time, the groove on the fixing seat (301) and the locking ring (105) on the annular seat (103) are in contact. Step 2: When locking the cover (101), turn the handle (102). When the handle (102) rotates, it drives the sealing cover (202) to rotate through the connecting bracket (201). Through the action of the protrusion, the sealing cover (202) drives the rotating shaft (307) to rotate, which in turn drives the lead screw (308) to rotate. When the lead screw (308) rotates, it engages with the threaded groove on the transmission seat (305) to drive the transmission seat (305) to descend. When the transmission seat (305) descends, it passes through the connecting block (304). The shaft is driven to descend. Through the sliding between the shaft and the connecting hole and the rotation between the shaft and the movable seat (302), the movable seat (302) rotates around the connection point between the movable seat (302) and the fixed seat (301). This causes the latch (303) on the movable seat (302) to approach the groove on the fixed seat (301). The cover (101) and the ring seat (103) are locked through the locking ring (105), the groove on the fixed seat (301), and the latch (303). Step 3: When the lid (101) is opened, when the internal air pressure of the tank is high, the gas inside the tank enters the cavity (502) through the L-shaped hole (506), pushing the piston plate (503) to move and compressing the second spring (504). When the internal air pressure of the tank is too high, the piston plate (503) moves a greater distance. At this time, the piston plate (503) pushes the limiting rod (505) through the round hole (309) and into the limiting hole (310) of the rotating shaft (307). At the same time, the piston plate (503) moves to the other side of the connecting pipe (507). The limiting rod (505) and the limiting hole (310) restrict the rotation of the rotating shaft (307). At this time, the rotating shaft (307) cannot be rotated by the handle (102), thus making it impossible for the lid (101) to be opened directly. Step 4: After the piston plate (503) moves to the other side of the connecting pipe (507), the gas inside the tank enters the Y-shaped hole (203) of the connecting frame (201) through the connecting pipe (507) and the hose (501), pushing the piston block (204) to move, and then pushing the support plate (206) out of the rectangular groove through the connecting rod (205). Since the gas pressure inside the tank is too high at this time, the connecting rod (205) cannot easily retract into the Y-shaped hole (203). At this time, the handle (102) drives the connecting frame (201) to rotate around the sealing cover (202). Since the support plate (206) slides out of the rectangular groove at this time, the support plate (206) and the cover (101) come into contact during the rotation of the connecting frame (201), pushing the sealing cover (202) to rise along the rotating shaft (307). Step 5: The sealing cover (202) rises, causing the sealing block (405) to leave the sealing groove on the rotating shaft (307), and also causing the pressure relief pipe (401) to rise. When the through hole (406) on the pressure relief pipe (401) enters the sealing groove, since the sealing groove is a frustum structure, the gas inside the tank enters the pressure relief pipe (401) through the filter seat (403), and then exits through the through hole (406), and is output to the external environment through the venting groove (207) on the sealing cover (202), thereby reducing the internal gas pressure of the tank.

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