Liquefied gas steel cylinder automatic filling equipment and liquefied gas steel cylinder automatic filling method

Abstract

The invention relates to automatic filling equipment for liquefied gas steel cylinders and an automatic filling method for the liquefied gas steel cylinders. The equipment comprises a conveying belt used for conveying the liquefied gas steel cylinders, and a cleaning device used for cleaning the liquefied gas steel cylinders conveyed by the conveying belt; the pre-filling code scanning pre-inspection system is used for code scanning identification and empty bottle weighing; the rotating disc type liquefied gas filling device is used for filling gas into a liquefied gas steel cylinder; the sealing performance detection device is used for detecting the sealing performance of the bottle opening of the liquefied gas steel bottle; the post-inflation code scanning reinspection system is used for code scanning recognition and weighing treatment after inflation; the sealing device is used for sealing the bottle opening of the liquefied gas steel bottle which is conveyed by the conveying belt, is inflated through sealing performance detection and is subjected to weighing treatment; the cylinder stacking device is used for stacking the sealed liquefied gas steel cylinders; the conveying belt is further used for conveying away the stacked liquefied gas steel cylinders. According to the liquefied gas steel cylinder inflation device, manpower resources and operation cost needed in the liquefied gas steel cylinder inflation operation process can be reduced, and the liquefied gas steel cylinder inflation operation efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of liquefied petroleum gas (LPG) cylinders, and in particular to an automatic filling device and method for LPG cylinders. Background Technology

[0002] Liquefied petroleum gas (LPG) cylinders, as important pressure vessels widely used in industrial production and daily life, are primarily used for the safe storage and efficient transportation of various high-pressure gases, including but not limited to flammable, explosive, or combustion-supporting gases such as oxygen, coal gas, and LPG. These sealed containers, made of high-strength steel, play an indispensable role in modern infrastructure construction and energy supply systems due to their excellent pressure-bearing performance and reliable safety guarantees. However, the traditional mechanical filling equipment commonly used in the industry requires multiple operations when filling LPG cylinders, including cleaning, filling, sealing tests, and sealing. These operations must be performed in separate work areas, requiring workers to transport LPG cylinders multiple times, consuming significant manpower and time costs. This results in a technical deficiency of low operational efficiency for the entire LPG cylinder filling system. Summary of the Invention

[0003] Based on this, the purpose of this application is to provide an automatic filling device and method for liquefied petroleum gas (LPG) cylinders, which can overcome the shortcomings of the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] The first aspect of this application provides an automatic filling device for liquefied petroleum gas cylinders, including: a conveyor belt, and a cleaning device, a pre-filling barcode scanning and inspection system, a rotary liquefied petroleum gas filling device, a sealing detection device, a post-filling barcode scanning and re-inspection system, a sealing device, and a stacking device connected sequentially through the conveyor belt.

[0006] The conveyor belt is used to transport liquefied petroleum gas (LPG) cylinders, and the cleaning device is used to clean the LPG cylinders transported by the conveyor belt; the pre-filling barcode scanning and pre-inspection system is used to scan and identify the cleaned LPG cylinders and weigh the empty cylinders.

[0007] The rotary liquefied petroleum gas (LPG) filling device includes: a rotary base, a plurality of LPG filling devices, and a rotary drive device; the plurality of LPG filling devices are evenly arranged on the rotary base; the rotary drive device abuts against the outer side wall of the rotary base, and the rotary drive device is used to drive the rotary base to rotate, so that each LPG filling device receives the LPG cylinders that have been weighed after being transported by the conveyor belt, and fills the LPG cylinders while following the rotary base to rotate, until it has rotated once and then interacts with the conveyor belt again to exchange LPG cylinders, so as to transport the filled LPG cylinders away by the conveyor belt, and to receive new LPG cylinders that have been weighed after being transported by the conveyor belt;

[0008] The sealing detection device is used to detect the sealing performance of the bottle mouth of the fully filled liquefied gas cylinders transported by the conveyor belt; the post-filling barcode scanning and re-inspection system is used to scan and identify the liquefied gas cylinders that have passed the sealing detection and to weigh them after filling.

[0009] The sealing device is used to seal the mouth of the liquefied gas cylinders that have been filled and weighed and transported by the conveyor belt.

[0010] The stacking device is used to stack the sealed liquefied gas cylinders transported by the conveyor belt.

[0011] The conveyor belt is also used to transport away the stacked liquefied gas cylinders.

[0012] In one embodiment, the turntable drive device includes a transverse transmission wheel and a turntable drive motor;

[0013] The wheel surface of the transverse transmission wheel abuts against the outer wall of the turntable base. The turntable drive motor is connected to the wheel core of the transverse transmission wheel. The turntable drive motor is used to drive the transverse transmission wheel to rotate laterally, thereby causing the turntable base to rotate laterally.

[0014] In one embodiment, the liquefied gas filling device includes: a first frame, a fixing device, a lifting device, and a filling device;

[0015] The fixing device and the lifting device are respectively connected to the first frame. The first frame is used to support the fixing device and the lifting device. The fixing device is used to fix the liquefied gas cylinder to be filled.

[0016] The inflation device is connected to the lifting device, which is used to drive the inflation device to move up and down. The inflation device is equipped with an inflation gun, the nozzle of which is used to be horizontally connected to the mouth of the liquefied gas cylinder. The inflation gun is used to inflate the liquefied gas cylinder through the mouth of the cylinder.

[0017] In one embodiment, the inflation device further includes a translational slide rail and a translational slider;

[0018] The translation slide rail is connected to the lifting device, the translation slider is movably connected to the translation slide rail, and the gun body of the air gun is connected to the translation slider.

[0019] In one embodiment, the inflation device further includes a limiting ring; the limiting ring includes two rods and an open ring body;

[0020] The two rods are respectively disposed on both sides of the nozzle of the gas filling gun, and the ends of the two rods are connected to the two ends of the open ring. When the lifting device drives the gas filling device to move up and down, the open ring moves up and down in accordance with the angle valve of the liquefied gas cylinder.

[0021] In one embodiment, the fixing device includes a drive mechanism and a swing arm fixing mechanism;

[0022] The swing arm fixing mechanism includes a first swing arm assembly and a second swing arm assembly; the first swing arm assembly includes a first movable arm, a first driven arm, and a first fixed shaft fixedly connected to the first frame; one end of the first movable arm is movably connected to the drive mechanism, the other end of the first movable arm is pivotally connected to the first fixed shaft, one end of the first driven arm is connected to the other end of the first movable arm, and the other end of the first driven arm is provided with a first fixing ring; the second swing arm assembly includes a second movable arm, a second driven arm, and a second fixed shaft fixedly connected to the first frame; one end of the second movable arm is movably connected to the drive mechanism, the other end of the second movable arm is pivotally connected to the second fixed shaft, one end of the second driven arm is connected to the other end of the second movable arm, and the other end of the second driven arm is provided with a second fixing ring;

[0023] The first fixing ring and the second fixing ring are located on both sides of the liquefied gas cylinder to be fixed.

[0024] In one embodiment, the liquefied gas filling device further includes a knob device; the knob device includes: a first lifting mechanism, a knob mechanism, and an angle valve sleeve;

[0025] The first lifting mechanism is mounted on the first frame and is connected to the knob mechanism. The first lifting mechanism is used to drive the knob mechanism to move up and down above the liquefied gas cylinder.

[0026] The knob mechanism is connected to the top of the angle valve sleeve, and the bottom of the angle valve sleeve is provided with an angle valve groove for engaging the angle valve of the liquefied gas cylinder. The opening size of the angle valve groove decreases from bottom to top. The knob mechanism is used to rotate the angle valve sleeve, so that the angle valve sleeve drives the engaged angle valve to rotate.

[0027] In one embodiment, the sealing detection device includes a second frame, a second lifting mechanism, a sealing cover, and a leakage detector;

[0028] The second frame is provided with a working space, and the conveyor belt passes through the working space of the second frame. The conveyor belt is used to transport liquefied gas cylinders in and out of the working space of the second frame.

[0029] The second lifting mechanism is connected to the second frame, the second lifting mechanism is located above the sealing cover, the second lifting mechanism is connected to the top of the sealing cover, and the second lifting mechanism is used to drive the sealing cover with the opening facing downward to move up and down in the workspace;

[0030] The leak detector is fixedly connected to the second frame, and the detection probe of the leak detector is inserted inside the sealing cover.

[0031] In one embodiment, the bottle stacking device includes a third frame, a third lifting mechanism, and a bottle bottom clamping mechanism;

[0032] The third frame is provided with a working space, and the conveyor belt passes through the working space of the third frame. The conveyor belt is used to transport liquefied gas cylinders in and out of the working space of the third frame.

[0033] The third lifting mechanism includes a lifting cylinder and a transmission assembly. The lifting cylinder of the third lifting mechanism is fixedly connected to the third frame, and the transmission assembly of the third lifting mechanism is movably connected to the lifting cylinder.

[0034] The bottle bottom clamping mechanism includes an n-shaped bracket, a first clamping assembly, and a second clamping assembly. The n-shaped bracket is fixedly connected to the transmission assembly, and the n-shaped bracket has two support arms. The two support arms are located on both sides of the transport path of the conveyor belt, and the first clamping assembly and the second clamping assembly are respectively disposed at the ends of the two support arms.

[0035] The lifting cylinder of the lifting assembly and the transmission assembly are used to drive the first clamping assembly and the second clamping assembly to lift and lower via the n-shaped bracket; the bottle bottom clamping mechanism is used to clamp the bottom of the liquefied gas cylinder by the first clamping assembly and the second clamping assembly when the first clamping assembly and the second clamping assembly descend to the bottom of the liquefied gas cylinder transported to the working space by the corresponding conveyor belt; the lifting cylinder of the lifting assembly and the transmission assembly are used to drive the liquefied gas cylinder clamped by the first clamping assembly and the second clamping assembly to rise via the n-shaped bracket.

[0036] Compared with traditional technologies, the beneficial effects of this application are:

[0037] The automatic liquefied petroleum gas (LPG) cylinder filling equipment of this application transports LPG cylinders via a conveyor belt, allowing the cylinders to sequentially pass through a cleaning device, a rotary LPG filling device, a sealing detection device, a sealing device, and a stacking device. The cleaning device cleans the LPG cylinders transported by the conveyor belt; the rotary LPG filling device fills the empty cylinders after weighing; the weighing device after filling checks the sealing performance of the cylinder mouths; the sealing device seals the cylinder mouths; the stacking device stacks the sealed LPG cylinders; and finally, the conveyor belt transports the stacked cylinders away. This reduces the manpower required for LPG cylinder filling operations, lowers the operating costs, and improves the efficiency of LPG cylinder filling.

[0038] A second aspect of this application provides an automatic filling method for liquefied petroleum gas (LPG) cylinders, applied to the automatic filling equipment for LPG cylinders described above. The method includes:

[0039] The liquefied gas cylinders are transported by the conveyor belt to the cleaning device, and the cleaning device cleans the liquefied gas cylinders transported by the conveyor belt.

[0040] The liquefied petroleum gas (LPG) cylinders that have been weighed after emptying are transported via the conveyor belt to the LPG filling device of the rotary LPG filling apparatus. The rotary base is driven to rotate by the rotary drive device, so that the LPG filling device follows the rotation of the rotary base while filling the weighed LPG cylinders with gas. After the LPG cylinders have rotated one revolution, they exchange with the conveyor belt again, so that the filled LPG cylinders can be transported away by the conveyor belt, and new LPG cylinders that have been weighed after emptying can be received by the conveyor belt.

[0041] The filled liquefied gas cylinders are transported via the conveyor belt to the sealing test device, where the sealing performance of the cylinder opening is tested.

[0042] The liquefied gas cylinders, after being filled and weighed, are transported by the conveyor belt to the sealing device, where the cylinder openings are sealed.

[0043] The sealed liquefied gas cylinders are transported by the conveyor belt to the stacking device, where they are stacked.

[0044] The stacked liquefied gas cylinders are transported away via the conveyor belt.

[0045] Compared with traditional technologies, the beneficial effects of this application are:

[0046] The automatic filling method for liquefied petroleum gas (LPG) cylinders disclosed in this application involves transporting LPG cylinders via a conveyor belt. The LPG cylinders sequentially pass through a cleaning device, a rotary LPG filling device, a sealing detection device, a sealing device, and a stacking device. The cleaning device cleans the LPG cylinders transported by the conveyor belt; the rotary LPG filling device fills the empty LPG cylinders after weighing; a weighing device after filling checks the sealing performance of the cylinder mouths; the sealing device seals the cylinder mouths; the stacking device stacks the sealed LPG cylinders; and finally, the stacked LPG cylinders are transported away via the conveyor belt. This method reduces the manpower required for LPG cylinder filling operations, lowers the operating costs, and improves the efficiency of LPG cylinder filling.

[0047] To better understand and implement this application, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of an automatic filling device for liquefied petroleum gas cylinders according to an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of a rotary liquefied gas filling device for an automatic liquefied gas cylinder filling equipment according to an embodiment of this application;

[0050] Figure 3 This is a schematic diagram of a rotary liquefied gas filling device according to an embodiment of this application;

[0051] Figure 4 This is a schematic diagram of the filling device of a liquefied gas filling device according to an embodiment of this application;

[0052] Figure 5 This is a schematic diagram of the fixing device of a liquefied gas filling device according to an embodiment of this application;

[0053] Figure 6 This is a schematic diagram of the knob device of a liquefied gas filling device according to an embodiment of this application;

[0054] Figure 7 This is a schematic diagram of a sealing detection device for an automatic filling equipment for liquefied gas cylinders according to an embodiment of this application.

[0055] Figure 8 This is a schematic diagram of the stacking device of an automatic liquefied gas cylinder filling equipment according to an embodiment of this application;

[0056] Figure 9 This is a schematic diagram of the third lifting mechanism of a bottle stacking device according to an embodiment of this application.

[0057] 1. Conveyor belt; 2. Pre-filling barcode scanning and pre-inspection system; 3. Rotary LPG filling device; 31. Rotary base; 33. LPG filling device; 331. First frame; 332. Lifting device; 3321. Lifting guide rail; 3323. Lifting slider; 3325. First connecting plate; 333. Filling device; 3331. Filling gun; 3333. Translation slide rail; 3335. Translation slider; 3337. Limiting device 334; Ring; 3341; Drive mechanism; 3342; Swing arm fixing mechanism; 33421; First swing arm assembly; 334211; First movable arm; 334212; First driven arm; 3342121; First fixed ring; 334213; First fixed shaft; 33422; Second swing arm assembly; 334221; Second movable arm; 334222; Second driven arm; 33422 21. Second fixing ring; 334223. Second fixing shaft; 335. Knob device; 3351. First lifting mechanism; 3353. Knob mechanism; 33531. Rotary motor; 33523. Connecting module; 3355. Angle valve sleeve; 4. Sealing detection device; 41. Second frame; 43. Second lifting mechanism; 45. Sealing cover; 47. Leakage detector; 48. Alarm; 5. Post-filling barcode scanning and re-inspection system; 6. Bottle stacking device; 61. Third frame; 611. First support frame; 613. Second support frame; 615. Horizontal support frame; 617. Guide rod; 63. Third lifting mechanism; 631. Lifting piston rod; 633. Transmission chain; 635. Fixed pulley; 65. Bottle bottom clamping mechanism; 651. N-type bracket; 6511. Guide ring; 653. First clamping assembly; 655. Second clamping assembly. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0059] It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0060] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. The singular forms "a," "the," and "the" used in this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. The word "if" as used herein can be interpreted as "when," "when," or "in response to determination."

[0061] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0062] Please see Figure 1-2 , Figure 1 This is a schematic diagram of the automatic filling equipment for liquefied petroleum gas cylinders according to this application. Figure 2 This is a schematic diagram of the rotary liquefied gas filling device 333 of the automatic filling equipment for liquefied gas cylinders of this application, including: a conveyor belt 1, and a cleaning device (not shown), a pre-filling barcode scanning inspection system 2, a rotary liquefied gas filling device 333, a sealing detection device 4, a post-filling barcode scanning re-inspection system 5, a sealing device (not shown), and a stacking device 6 connected in sequence through the conveyor belt 1.

[0063] The conveyor belt 1 is used to transport liquefied gas cylinders, and the cleaning device is used to clean the liquefied gas cylinders transported by the conveyor belt 1; the pre-filling barcode scanning and pre-inspection system 2 is used to scan and identify the liquefied gas cylinders after cleaning and weigh the empty cylinders.

[0064] The rotary liquefied petroleum gas (LPG) filling device 333 includes: a rotary base 31, a plurality of LPG filling devices 33, and a rotary drive device; the plurality of LPG filling devices 33 are evenly arranged on the rotary base 31; the rotary drive device abuts against the outer side wall of the rotary base 31, and the rotary drive device is used to drive the rotary base 31 to rotate, so that each LPG filling device 33 receives the LPG cylinders that have been weighed after being transported by the conveyor belt 1, and fills the LPG cylinders while following the rotary base 31 to rotate, until it rotates once and then exchanges with the conveyor belt 1 again to transport the filled LPG cylinders away by the conveyor belt 1, and to receive new LPG cylinders that have been weighed after being transported by the conveyor belt 1.

[0065] The sealing detection device 4 is used to detect the sealing of the bottle mouth of the liquefied gas cylinder that has been filled and transported by the conveyor belt 1; the post-filling barcode scanning and re-inspection system 5 is used to scan and identify the liquefied gas cylinder that has passed the sealing detection and to weigh it after filling.

[0066] The sealing device is used to seal the mouth of the liquefied gas cylinders that have been filled and weighed and transported by the conveyor belt 1.

[0067] The stacking device 6 is used to stack the sealed liquefied gas cylinders transported by the conveyor belt 1.

[0068] The conveyor belt 1 is also used to transport away the stacked liquefied gas cylinders.

[0069] The pre-filling barcode scanning inspection system 2 and the post-filling barcode scanning re-inspection system 5 have the same structure, both including a device frame, a barcode scanning mechanism, a fixing frame, a lifting mechanism, and a weighing mechanism. The conveyor belt passes through the device frame, and the barcode scanning mechanism is located inside the device frame. The barcode scanning mechanism is used to scan the QR code markings on the liquefied gas cylinders transported by the conveyor belt to read the information of the liquefied gas cylinders and record the current status and weight information of the liquefied gas cylinders. The fixing frame is fixedly connected to the frame of the conveyor belt transporting the cylinders, and the fixing frame is located below the track surface of the conveyor belt.

[0070] The lifting mechanism is movably mounted on the fixed frame, and the weighing mechanism is located above the fixed frame. The top of the weighing mechanism is equipped with a lifting ring, which is used to contact the bottom of the gas cylinder located above the track surface. The weighing mechanism is connected to the lifting end of the lifting mechanism. The lifting mechanism is used to drive the weighing mechanism upward, causing the lifting ring of the weighing mechanism to pass through the track surface of the conveyor belt and contact the bottom of the liquefied gas cylinder located above the track surface to lift the cylinder. The lifting mechanism is also used to drive the weighing mechanism downward, causing the lifting ring of the weighing mechanism to return to below the track surface of the conveyor belt. The weighing mechanism is used to weigh the weight of the liquefied gas cylinder lifted by the lifting ring.

[0071] In one feasible embodiment, a blocking mechanism is provided in front of the cleaning device, the pre-filling barcode scanning inspection system, the sealing detection device, the post-filling barcode scanning re-inspection system, the sealing device, and the stacking device. The blocking mechanism is used to block the liquefied gas cylinders on the conveyor belt, preventing the blocked liquefied gas cylinders from continuing to move along the conveyor chain. Specifically, the blocking mechanism includes a blocking cylinder and a blocking rod.

[0072] The blocking cylinder is located on one side of the conveyor belt. The blocking cylinder is used to drive the blocking rod to move back and forth, including driving the blocking rod to extend above the track surface of the conveyor belt to prevent the cylinders on the conveyor belt from colliding with the cylinders being weighed, and driving the blocking rod to retract so that the liquefied gas cylinders on the conveyor belt continue to move with the conveyor chain of the conveyor belt.

[0073] The conveyor belt is a transport mechanism that uses a metal chain as the medium to carry and transport liquefied gas cylinders; the metal chain is the transport chain of the conveyor belt.

[0074] In one feasible embodiment, the automatic LPG cylinder filling equipment is further equipped with multiple cylinder pushing mechanisms. For example, the pre-filling barcode scanning inspection system 2, the sealing detection device 4, and the post-filling barcode scanning re-inspection system 5 are all accompanied by a cylinder pushing mechanism. The cylinder pushing mechanism is used to push LPG cylinders that are detected as having abnormal weighing by the pre-filling barcode scanning inspection system 2, gas leakage at the cylinder valve detected by the sealing detection device 4, or abnormal weighing by the post-filling barcode scanning re-inspection system 5 away from the conveyor belt. The automatic LPG cylinder filling equipment can also use the cylinder pushing mechanism to push LPG cylinders that are detected as having normal weighing by the pre-filling barcode scanning inspection system 2 to the rotary LPG filling device, so that the LPG cylinders can be filled by the rotary LPG filling device.

[0075] In one feasible embodiment, the turntable drive device includes a transverse transmission wheel and a turntable drive motor;

[0076] The wheel surface of the transverse transmission wheel abuts against the outer wall of the turntable base 31. The turntable drive motor is connected to the wheel core of the transverse transmission wheel. The turntable drive motor is used to drive the transverse transmission wheel to rotate laterally, thereby driving the turntable base 31 to rotate laterally.

[0077] The body of the drive motor can be fixedly installed on the ground or fixedly installed on the frame of the first or second transport device.

[0078] Please see Figure 3 In one feasible embodiment, the liquefied gas filling device 33 includes: a first frame 331, a fixing device 334, a lifting device 332, and a filling device 333;

[0079] The fixing device 334 and the lifting device 332 are respectively connected to the first frame 331. The first frame 331 is used to support the fixing device 334 and the lifting device 332. The fixing device 334 is used to fix the liquefied gas cylinder to be filled.

[0080] The inflation device 333 is connected to the lifting device 332. The lifting device 332 is used to drive the inflation device 333 to move up and down. The inflation device 333 is equipped with an inflation gun 3331. The nozzle of the inflation gun 3331 is used to be horizontally connected to the mouth of the liquefied gas cylinder. The inflation gun 3331 is used to inflate the liquefied gas cylinder through the mouth of the cylinder.

[0081] In this embodiment, the lifting device 332 can be used to drive the inflation device 333 to move up and down. When the inflation device 333 is lowered to a position level with the mouth of the liquefied steel cylinder, the inflation device 333 is horizontally connected to the mouth of the liquefied steel cylinder through the nozzle of the inflation gun 3331, so that the liquefied steel cylinder is inflated through the connection between the nozzle and the mouth. Since the inflation process can be assisted by the lifting device 332 to raise and lower the inflation device 333, there is no need for manual holding and moving of the inflation gun 3331, which can improve the convenience and efficiency of filling liquefied steel cylinders.

[0082] In one feasible embodiment, the inflation device 333 further includes a translational slide rail 3333 and a translational slider 3335;

[0083] The translation slide rail 3333 is connected to the lifting device 332, the translation slider 3335 is movably connected to the translation slide rail 3333, and the gun body of the air gun 3331 is connected to the translation slider 3335.

[0084] Please see Figure 4In one feasible embodiment, the inflation device 333 further includes a limiting ring 3337; the limiting ring 3337 includes two rods and an open ring.

[0085] The two rods are respectively located on both sides of the nozzle of the inflation gun 3331. The ends of the two rods are connected to the two ends of the opening ring. When the lifting device 332 drives the inflation device 333 to move up and down, the opening ring moves up and down in accordance with the angle valve of the liquefied gas cylinder.

[0086] In one feasible embodiment, the lifting device 332 includes a lifting guide rail 3321 and a lifting slider 3323; the lifting guide rail 3321 is fixedly connected to the frame, the lifting slider 3323 is movably connected to the lifting guide rail 3321, and the translational slide rail 3333 of the inflation device 333 is fixedly connected to the lifting slider 3323.

[0087] Please see Figure 5 In one feasible embodiment, the fixing device 334 includes a drive mechanism 3341 and a swing arm fixing mechanism 3342;

[0088] The swing arm fixing mechanism 3342 includes a first swing arm assembly 33421 and a second swing arm assembly 33422; the first swing arm assembly 33421 includes a first movable arm 334211, a first driven arm 334212, and a first fixed shaft 334213 fixedly connected to the first frame 331; one end of the first movable arm 334211 is movably connected to the drive mechanism 3341, and the other end of the first movable arm 334211 is pivotally connected to the first fixed shaft 334213; one end of the first driven arm 334212 is connected to the other end of the first movable arm 334211. The other end is provided with a first fixing ring 3342121; the second swing arm assembly 33422 includes a second movable arm 334221, a second driven arm 334222 and a second fixed shaft 334223 fixedly connected to the first frame 331; one end of the second movable arm 334221 is movably connected to the drive mechanism 3341, the other end of the second movable arm 334221 is pivotally connected to the second fixed shaft 334223, one end of the second driven arm 334222 is connected to the other end of the second movable arm 334221, and the other end of the second driven arm 334222 is provided with a second fixing ring 3342221;

[0089] The first fixing ring 3342121 and the second fixing ring 3342221 are located on both sides of the body of the liquefied gas cylinder to be fixed.

[0090] In this embodiment, when the first movable arm 33421 of the first swing arm assembly 33421 and the second movable arm 33422 of the second swing arm assembly 33422 are driven to move by the drive mechanism 3341 disposed on the first frame 331, since the first movable arm 33421 is pivotally connected to the first fixed shaft 334213 and the second movable arm 334221 is pivotally connected to the second fixed shaft 334223, the first movable arm 334211 and the second movable arm 334221 can only rotate around the first fixed shaft 334213 and the second fixed shaft 334223 respectively, thereby driving the correspondingly connected first driven arm 334212 and second driven arm 334222 to rotate. The first fixing ring 3342121 on the first driven arm 334212 and the second fixing ring 3342221 on the second driven arm 334222 are brought closer together to abut against the body of the liquefied steel cylinder, thereby clamping and fixing the liquefied steel cylinder. When it is necessary to release the body of the liquefied steel cylinder, it is only necessary to drive the first movable arm 334211 of the first swing arm assembly 33421 and the second movable arm 334221 of the second swing arm assembly 33422 in the opposite direction through the drive mechanism 3341, so that the first fixing ring 3342121 on the first driven arm 334212 and the second fixing ring 3342221 on the second driven arm 334222 are moved away from each other, thereby releasing the body of the liquefied steel cylinder.

[0091] Please see Figure 6 In one feasible embodiment, the liquefied gas filling device 33 further includes a knob device 335; the knob device 335 includes: a first lifting mechanism 3351, a knob mechanism 3353, and an angle valve sleeve 3355;

[0092] The first lifting mechanism 3351 is mounted on the first frame 331. The first lifting mechanism 3351 is connected to the knob mechanism 3353. The first lifting mechanism 3351 is used to drive the knob mechanism 3353 to move up and down above the liquefied gas cylinder.

[0093] The knob mechanism 3353 is connected to the top of the angle valve sleeve 3355. The bottom of the angle valve sleeve 3355 is provided with an angle valve groove for engaging the angle valve of the liquefied gas cylinder. The opening size of the angle valve groove decreases from bottom to top. The knob mechanism 3353 is used to rotate the angle valve sleeve 3355, so that the angle valve sleeve 3355 drives the engaged angle valve to rotate.

[0094] In one feasible embodiment, the knob mechanism 3353 includes a rotary motor 33531 and a connecting module 33523;

[0095] The main shaft of the rotary motor 33531 is connected to the top of the angle valve sleeve 3355 via the connecting module 33523.

[0096] The first lifting mechanism 3351 drives the knob mechanism 3353 and the angle valve sleeve 3355 to descend, causing the angle valve groove at the bottom of the angle valve sleeve 3355 to engage with the angle valve of the liquefied gas cylinder. Then, the knob mechanism 3353 drives the angle valve sleeve 3355 to rotate, causing the angle valve engaged in the angle valve groove of the angle valve sleeve 3355 to rotate synchronously, thereby opening the angle valve and facilitating the filling of the liquefied gas cylinder through the opened angle valve. After filling is completed, the knob mechanism 3353 can again drive the angle valve sleeve. Rotating 3355 closes the angle valve. Then, the first lifting mechanism 3351 drives the knob mechanism 3353 and the angle valve sleeve 3355 to rise, separating the angle valve sleeve 3355 from the angle valve. This allows the user to remove the liquefied gas cylinder after the angle valve has been rotated, either manually or mechanically. This eliminates the need for manual rotation of the liquefied gas cylinder's angle valve, saving manpower. Furthermore, rotating the liquefied gas cylinder's angle valve mechanically improves rotation efficiency and accuracy, facilitating efficient and accurate rotation of the liquefied gas cylinder's angle valve.

[0097] Please see Figure 7 In one feasible embodiment, the sealing detection device 4 includes a second frame 41, a second lifting mechanism 43, a sealing cover 45, and a leakage detector 47;

[0098] The second frame 41 is provided with a working space, and the conveyor belt 1 passes through the working space of the second frame 41. The conveyor belt 1 is used to transport liquefied gas cylinders in and out of the working space of the second frame 41.

[0099] The second lifting mechanism 43 is connected to the second frame 41. The second lifting mechanism 43 is located above the sealing cover 45 and is connected to the top of the sealing cover 45. The second lifting mechanism 43 is used to drive the sealing cover 45 with the opening facing downward to move up and down in the workspace.

[0100] The leak detector 47 is fixedly connected to the second frame 41, and the detection probe of the leak detector 47 is inserted inside the sealing cover 45.

[0101] The second lifting mechanism 43 includes a lifting cylinder and a transmission assembly. The lifting cylinder of the second lifting mechanism 43 is fixedly connected to the second frame 41. The lifting cylinder of the second lifting mechanism 43 is connected to the top of the sealing cover 45 through a corresponding transmission assembly. The lifting cylinder of the second lifting mechanism 43 is used to drive the sealing cover 45 with the opening facing downward to move up and down in the working space through the corresponding transmission assembly.

[0102] The lifting cylinder is a cylindrical metal component that guides the piston in a linear reciprocating motion within the cylinder. Air in the engine cylinder expands, converting thermal energy into mechanical energy; gas in the compressor cylinder is compressed by the piston, increasing its pressure. Since the lifting cylinder is fixedly connected to the second frame 41, and the piston of the lifting cylinder is connected to the top of the sealing cover 45 via the transmission assembly, when the lifting cylinder of the second lifting mechanism 43 guides the piston in a linear reciprocating motion within the cylinder, it drives the sealing cover 45 to move linearly back and forth via the transmission assembly. In this embodiment, the direction of the linear reciprocating motion of the piston guided by the lifting cylinder of the second lifting mechanism 43 within the cylinder is vertical, thus driving the transmission assembly and the sealing cover 45 to move up and down.

[0103] Optionally, the transmission assembly of the second lifting mechanism 43 includes a plurality of transmission rods, the first ends of which are movably connected to the lifting cylinder, and the second ends of which are fixedly connected to the top of the sealing cover 45.

[0104] The plurality of transmission rods are evenly distributed above the sealing cover 45. The evenly distributed transmission rods can increase the force-bearing area of ​​the top of the sealing cover 45, reduce the force pressure on the top of the sealing cover 45, and improve the durability of the sealing cover 45.

[0105] Optionally, the second lifting mechanism 43 further includes a lifting limit assembly; both ends of the lifting limit assembly are fixedly connected to the second frame 41, the lifting limit assembly is provided with a plurality of limit openings, and the second ends of the plurality of transmission rods pass through the plurality of limit openings and are fixedly connected to the top of the sealing cover 45.

[0106] Optionally, the lifting and limiting assembly includes a plurality of limiting pipes; one end of the plurality of limiting pipes is connected to the plurality of limiting openings, the other end of the plurality of limiting pipes extends along the upward direction of the transmission rod, and the second end of the plurality of transmission rods passes through the plurality of limiting pipes and the plurality of limiting openings and is fixedly connected to the top of the sealing cover 45.

[0107] Optionally, the bottom opening of the sealing cover 45 is provided with a sealing ring. The sealing ring is a device used to prevent liquid or gas leakage, typically made of elastic material, and has a sealing function. Since the bottom opening of the sealing cover 45 abuts against the top of the liquefied gas cylinder through the sealing ring, and due to the elastic deformation characteristics of the sealing ring, even if there are some small uneven areas on the top of the liquefied gas cylinder, they can be filled by the sealing ring to improve the sealing performance of the formed sealed space.

[0108] Optionally, the sealing detection device 4 further includes an alarm 48, which is disposed on the top of the second frame 41 and is communicatively connected to the leak detector 47.

[0109] When the leak detector 47 detects a leak in the top valve of the liquefied gas cylinder, it transmits an alarm signal to the alarm 48, causing the alarm 48 to issue an alarm reminder.

[0110] Optionally, the alarm 48 is an audible and visual alarm 48. The audible and visual alarm 48 is designed to meet the customer's specific requirements for alarm loudness and installation location, and can emit both audible and visual alarm signals simultaneously.

[0111] Please see Figure 8 and Figure 9 In one feasible embodiment, the bottle stacking device 6 includes a third frame 61, a third lifting mechanism 63, and a bottle bottom clamping mechanism 65;

[0112] The third frame 61 is provided with a working space, and the conveyor belt 1 passes through the working space of the third frame 61. The conveyor belt 1 is used to transport liquefied gas cylinders in and out of the working space of the third frame 61.

[0113] The third lifting mechanism 63 includes a lifting cylinder and a transmission assembly. The lifting cylinder of the third lifting mechanism 63 is fixedly connected to the third frame 61, and the transmission assembly of the third lifting mechanism 63 is movably connected to the lifting cylinder.

[0114] The bottle bottom clamping mechanism 65 includes an n-shaped bracket 651, a first clamping component 653, and a second clamping component 655. The n-shaped bracket 651 is fixedly connected to the transmission component and has two support arms. The two support arms are located on both sides of the transport path of the conveyor belt 1, and the first clamping component 653 and the second clamping component 655 are respectively disposed at the ends of the two support arms.

[0115] The lifting cylinder of the lifting assembly and the transmission assembly are used to drive the first clamping assembly 653 and the second clamping assembly 655 to rise and fall via the n-shaped bracket 651; the bottle bottom clamping mechanism 65 is used to clamp the bottom of the liquefied gas cylinder by the first clamping assembly 653 and the second clamping assembly 655 when the first clamping assembly 653 and the second clamping assembly 655 descend to the bottom of the liquefied gas cylinder transported to the working space by the corresponding conveyor belt 1; the lifting cylinder of the lifting assembly and the transmission assembly are used to drive the liquefied gas cylinder clamped by the first clamping assembly 653 and the second clamping assembly 655 to rise via the n-shaped bracket 651.

[0116] The first clamping assembly 653 includes a first clamping cylinder, a first clamping piston rod, and a first clamping part; the first clamping cylinder is disposed at the end of one support arm of the n-type bracket 651, and the first clamping cylinder is connected to the first clamping part through the first clamping piston rod.

[0117] The second clamping assembly 655 includes a second clamping cylinder, a second clamping piston rod, and a second clamping part; the second clamping cylinder is disposed at the end of another support arm of the n-type bracket 651, and the second clamping cylinder is connected to the second clamping part through the second clamping piston rod;

[0118] The first clamping cylinder is used to drive the first clamping part to approach and abut against the bottom of the steel cylinder through the first clamping piston rod, and the second clamping cylinder is used to drive the second clamping part to approach and abut against the bottom of the steel cylinder through the second clamping piston rod, so that the first clamping assembly 653 and the second clamping assembly 655 clamp the bottom of the steel cylinder.

[0119] The automatic cylinder stacking device further includes a cylinder top clamping mechanism; the cylinder top clamping mechanism includes a cap lifting assembly and a cap body.

[0120] The cap lifting assembly is disposed on the top of the n-shaped bracket 651. The cap lifting assembly is drivenly connected to the cap body. The cap lifting assembly is used to lift the cap body so that the cap body abuts against the top of the cylinder, so as to cooperate with the first clamping assembly and the second clamping assembly to clamp the bottom of the cylinder.

[0121] Compared with traditional technologies, the beneficial effects of this application are:

[0122] The automatic liquefied petroleum gas (LPG) cylinder filling equipment of this application transports LPG cylinders via the conveyor belt 1, causing the LPG cylinders to sequentially pass through a cleaning device, a rotary LPG filling device 333, a sealing detection device 4, a sealing device, and a stacking device 6. The cleaning device cleans the LPG cylinders transported by the conveyor belt 1, and the rotary LPG filling device 333 fills the empty LPG cylinders after weighing them. The equipment then performs a weighing process after filling. The system uses a device 4 to check the sealing performance of the filled LPG cylinder mouth, a sealing device to seal the mouth of the weighed LPG cylinder after filling, a stacking device 6 to stack the sealed LPG cylinders, and a conveyor belt 1 to transport the stacked LPG cylinders away. This reduces the manpower required for LPG cylinder filling, lowers the operating cost of LPG cylinder filling, and improves the efficiency of LPG cylinder filling.

[0123] A second aspect of this application provides an automatic filling method for liquefied petroleum gas (LPG) cylinders, applied to the automatic filling equipment for LPG cylinders described above. The method includes:

[0124] The liquefied gas cylinders are transported by the conveyor belt to the cleaning device, and the cleaning device cleans the liquefied gas cylinders transported by the conveyor belt.

[0125] The liquefied petroleum gas (LPG) cylinders that have been weighed after emptying are transported via the conveyor belt to the LPG filling device of the rotary LPG filling apparatus. The rotary base is driven to rotate by the rotary drive device, so that the LPG filling device follows the rotation of the rotary base while filling the weighed LPG cylinders with gas. After the LPG cylinders have rotated one revolution, they exchange with the conveyor belt again, so that the filled LPG cylinders can be transported away by the conveyor belt, and new LPG cylinders that have been weighed after emptying can be received by the conveyor belt.

[0126] The filled liquefied gas cylinders are transported via the conveyor belt to the sealing test device, where the sealing performance of the cylinder opening is tested.

[0127] The liquefied gas cylinders, after being filled and weighed, are transported by the conveyor belt to the sealing device, where the cylinder openings are sealed.

[0128] The sealed liquefied gas cylinders are transported by the conveyor belt to the stacking device, where they are stacked.

[0129] The stacked liquefied gas cylinders are transported away via the conveyor belt.

[0130] Compared with traditional technologies, the beneficial effects of this application are:

[0131] The automatic filling method for liquefied petroleum gas (LPG) cylinders disclosed in this application involves transporting LPG cylinders via a conveyor belt. The LPG cylinders sequentially pass through a cleaning device, a rotary LPG filling device, a sealing detection device, a sealing device, and a stacking device. The cleaning device cleans the LPG cylinders transported by the conveyor belt; the rotary LPG filling device fills the empty LPG cylinders after weighing; a weighing device after filling checks the sealing performance of the cylinder mouths; the sealing device seals the cylinder mouths; the stacking device stacks the sealed LPG cylinders; and finally, the stacked LPG cylinders are transported away via the conveyor belt. This method reduces the manpower required for LPG cylinder filling operations, lowers the operating costs, and improves the efficiency of LPG cylinder filling.

[0132] The device embodiments described above are merely illustrative. The components described as separate parts may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this application according to actual needs. Those skilled in the art can understand and implement this without any inventive effort.

[0133] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0134] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 The computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function selected in one or more boxes.

[0135] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function selected in one or more boxes.

[0136] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0137] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0138] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0139] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0140] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An automatic filling device for liquefied petroleum gas cylinders, characterized in that, include: The conveyor belt, and the cleaning device, the pre-filling barcode scanning and inspection system, the rotary liquefied gas filling device, the sealing detection device, the post-filling barcode scanning and re-inspection system, the sealing device and the stacking device connected in sequence through the conveyor belt; The conveyor belt is used to transport liquefied petroleum gas cylinders, and the cleaning device is used to clean the liquefied petroleum gas cylinders transported by the conveyor belt. The pre-filling barcode scanning and pre-inspection system is used to scan and identify the cleaned liquefied gas cylinders and weigh the empty cylinders. The rotary liquefied petroleum gas (LPG) filling device includes: a rotary base, a plurality of LPG filling devices, and a rotary drive device; the plurality of LPG filling devices are evenly arranged on the rotary base; the rotary drive device abuts against the outer side wall of the rotary base, and the rotary drive device is used to drive the rotary base to rotate, so that each LPG filling device receives the LPG cylinders that have been weighed after being transported by the conveyor belt, and fills the LPG cylinders while following the rotary base to rotate, until it has rotated once and then interacts with the conveyor belt again to exchange LPG cylinders, so as to transport the filled LPG cylinders away by the conveyor belt, and to receive new LPG cylinders that have been weighed after being transported by the conveyor belt; The sealing detection device is used to detect the sealing performance of the bottle mouth of the fully filled liquefied gas cylinders transported by the conveyor belt; the post-filling barcode scanning and re-inspection system is used to scan and identify the liquefied gas cylinders that have passed the sealing detection and to weigh them after filling. The sealing device is used to seal the mouth of the liquefied gas cylinders that have been filled and weighed and transported by the conveyor belt. The stacking device is used to stack the sealed liquefied gas cylinders transported by the conveyor belt. The conveyor belt is also used to transport away the stacked liquefied gas cylinders.

2. The automatic filling equipment for liquefied petroleum gas cylinders according to claim 1, characterized in that, The turntable drive device includes a transverse transmission wheel and a turntable drive motor; The wheel surface of the transverse transmission wheel abuts against the outer wall of the turntable base. The turntable drive motor is connected to the wheel core of the transverse transmission wheel. The turntable drive motor is used to drive the transverse transmission wheel to rotate laterally, thereby causing the turntable base to rotate laterally.

3. The automatic filling equipment for liquefied petroleum gas cylinders according to claim 2, characterized in that, The liquefied gas filling device includes: a first frame, a fixing device, a lifting device, and a filling device; The fixing device and the lifting device are respectively connected to the first frame. The first frame is used to support the fixing device and the lifting device. The fixing device is used to fix the liquefied gas cylinder to be filled. The inflation device is connected to the lifting device, which is used to drive the inflation device to move up and down. The inflation device is equipped with an inflation gun, the nozzle of which is used to be horizontally connected to the mouth of the liquefied gas cylinder. The inflation gun is used to inflate the liquefied gas cylinder through the mouth of the cylinder.

4. The automatic filling equipment for liquefied petroleum gas cylinders according to claim 3, characterized in that, The inflation device also includes a translational slide rail and a translational slider; The translation slide rail is connected to the lifting device, the translation slider is movably connected to the translation slide rail, and the gun body of the air gun is connected to the translation slider.

5. The automatic filling equipment for liquefied petroleum gas cylinders according to claim 4, characterized in that, The inflation device also includes a limiting ring; the limiting ring includes two rods and an open ring body; The two rods are respectively disposed on both sides of the nozzle of the gas filling gun, and the ends of the two rods are connected to the two ends of the open ring. When the lifting device drives the gas filling device to move up and down, the open ring moves up and down in accordance with the angle valve of the liquefied gas cylinder.

6. The automatic filling equipment for liquefied petroleum gas cylinders according to claim 3, characterized in that, The fixing device includes a drive mechanism and a swing arm fixing mechanism; The swing arm fixing mechanism includes a first swing arm assembly and a second swing arm assembly; the first swing arm assembly includes a first movable arm, a first driven arm, and a first fixed shaft fixedly connected to the first frame; one end of the first movable arm is movably connected to the drive mechanism, the other end of the first movable arm is pivotally connected to the first fixed shaft, one end of the first driven arm is connected to the other end of the first movable arm, and the other end of the first driven arm is provided with a first fixing ring; the second swing arm assembly includes a second movable arm, a second driven arm, and a second fixed shaft fixedly connected to the first frame; one end of the second movable arm is movably connected to the drive mechanism, the other end of the second movable arm is pivotally connected to the second fixed shaft, one end of the second driven arm is connected to the other end of the second movable arm, and the other end of the second driven arm is provided with a second fixing ring; The first fixing ring and the second fixing ring are located on both sides of the liquefied gas cylinder to be fixed.

7. The automatic filling equipment for liquefied petroleum gas cylinders according to claim 3, characterized in that, The liquefied gas filling device further includes a knob device; the knob device includes: a first lifting mechanism, a knob mechanism, and an angle valve sleeve; The first lifting mechanism is mounted on the first frame and is connected to the knob mechanism. The first lifting mechanism is used to drive the knob mechanism to move up and down above the liquefied gas cylinder. The knob mechanism is connected to the top of the angle valve sleeve, and the bottom of the angle valve sleeve is provided with an angle valve groove for engaging the angle valve of the liquefied gas cylinder. The opening size of the angle valve groove decreases from bottom to top. The knob mechanism is used to rotate the angle valve sleeve, so that the angle valve sleeve drives the engaged angle valve to rotate.

8. The automatic filling equipment for liquefied petroleum gas cylinders according to claim 1, characterized in that, The sealing detection device includes a second frame, a second lifting mechanism, a sealing cover, and a leak detector; The second frame is provided with a working space, and the conveyor belt passes through the working space of the second frame. The conveyor belt is used to transport liquefied gas cylinders in and out of the working space of the second frame. The second lifting mechanism is connected to the second frame, the second lifting mechanism is located above the sealing cover, the second lifting mechanism is connected to the top of the sealing cover, and the second lifting mechanism is used to drive the sealing cover with the opening facing downward to move up and down in the workspace; The leak detector is fixedly connected to the second frame, and the detection probe of the leak detector is inserted inside the sealing cover.

9. The automatic filling equipment for liquefied petroleum gas cylinders according to claim 1, characterized in that, The bottle stacking device includes a third frame, a third lifting mechanism, and a bottle bottom clamping mechanism; The third frame is provided with a working space, and the conveyor belt passes through the working space of the third frame. The conveyor belt is used to transport liquefied gas cylinders in and out of the working space of the third frame. The third lifting mechanism includes a lifting cylinder and a transmission assembly. The lifting cylinder of the third lifting mechanism is fixedly connected to the third frame, and the transmission assembly of the third lifting mechanism is movably connected to the lifting cylinder. The bottle bottom clamping mechanism includes an n-shaped bracket, a first clamping assembly, and a second clamping assembly. The n-shaped bracket is fixedly connected to the transmission assembly, and the n-shaped bracket has two support arms. The two support arms are located on both sides of the transport path of the conveyor belt, and the first clamping assembly and the second clamping assembly are respectively disposed at the ends of the two support arms. The lifting cylinder of the lifting assembly and the transmission assembly are used to drive the first clamping assembly and the second clamping assembly to lift and lower via the n-shaped bracket; the bottle bottom clamping mechanism is used to clamp the bottom of the liquefied gas cylinder by the first clamping assembly and the second clamping assembly when the first clamping assembly and the second clamping assembly descend to the bottom of the liquefied gas cylinder transported to the working space by the corresponding conveyor belt; the lifting cylinder of the lifting assembly and the transmission assembly are used to drive the liquefied gas cylinder clamped by the first clamping assembly and the second clamping assembly to rise via the n-shaped bracket.

10. An automatic filling method for liquefied petroleum gas cylinders, characterized in that, The method, applied to the automatic filling equipment for liquefied petroleum gas cylinders as described in any one of claims 1-9, comprises: The liquefied gas cylinders are transported by the conveyor belt to the cleaning device, and the cleaning device cleans the liquefied gas cylinders transported by the conveyor belt. The liquefied petroleum gas (LPG) cylinders that have been weighed after emptying are transported via the conveyor belt to the LPG filling device of the rotary LPG filling apparatus. The rotary base is driven to rotate by the rotary drive device, so that the LPG filling device follows the rotation of the rotary base while filling the weighed LPG cylinders with gas. After the LPG cylinders have rotated one revolution, they exchange with the conveyor belt again, so that the filled LPG cylinders can be transported away by the conveyor belt, and new LPG cylinders that have been weighed after emptying can be received by the conveyor belt. The filled liquefied gas cylinders are transported via the conveyor belt to the sealing test device, where the sealing performance of the cylinder opening is tested. The liquefied gas cylinders, after being filled and weighed, are transported by the conveyor belt to the sealing device, where the cylinder openings are sealed. The sealed liquefied gas cylinders are transported by the conveyor belt to the stacking device, where they are stacked. The stacked liquefied gas cylinders are transported away via the conveyor belt.

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