Foldable steel cylinder weighing and heating trolley

Abstract

A folding gas cylinder weighing and heating trolley includes a frame, handlebars, a weighing assembly, a weighing indicator, a heating assembly, and a power supply module. Wheels are rotatably mounted on the left and right sides of the frame. The front end of the handlebars is rotatably mounted on the upper rear side of the frame via a handlebar opening and closing mechanism. The handlebars are folded down and stored on the frame. The weighing assembly is fixedly mounted on the lower front side of the frame, the weighing indicator is fixedly mounted on the top of the frame, and the heating assembly is fixedly mounted on the lower middle front side of the frame. The power supply module is located inside the frame and is electrically connected to the heating assembly. The weighing indicator is connected to both the weighing assembly and the electronic tag signal of the gas cylinder. This invention can weigh gas cylinders and upload the weight data to the cylinder's electronic tag, enabling measurement of the remaining gas level inside the cylinder. It also allows the cylinder to be pushed to the desired location and can be heated during gas usage to ensure smooth gas discharge.

Description

Technical Field

[0001] This invention relates to the field of cylinder weighing technology, and more specifically, to a foldable cylinder weighing and heating trolley. Background Technology

[0002] During storage and use, it is difficult to measure the remaining gas level in gas cylinders. Furthermore, when large quantities of gas are used, the gas absorbs heat during vaporization, and frost and low temperatures can affect the smooth discharge of the stored gas. To facilitate gas usage and control the amount of remaining gas in cylinders, a simple folding gas cylinder weighing and heating trolley with heating, weighing, and remote data transmission functions has been designed. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a foldable steel cylinder weighing and heating trolley. This invention can weigh steel cylinders and upload the weight data to the cylinder's electronic tag, thereby measuring the remaining gas level inside the cylinder. It can also push the cylinder to the required location and heat the cylinder during gas usage to ensure that the gas inside the cylinder can be smoothly discharged.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The folding steel cylinder weighing and heating trolley includes a frame, handlebars, weighing assembly, weighing indicator, heating assembly, and power supply module. Wheels are symmetrically mounted on the lower left and right sides of the frame, providing rolling support on the ground. The bottom of the frame is above the ground. The handlebars are positioned at the rear of the frame, with the front end rotatably mounted on the upper rear side of the frame via a handlebar opening and closing mechanism. The handlebars fold down and are stored on the frame. The weighing assembly is fixedly mounted on the lower front side of the frame, the weighing indicator is fixedly mounted on the top of the frame, and the heating assembly is fixedly mounted on the lower middle front side of the frame. The power supply module is located inside the frame and is electrically connected to the heating assembly. The weighing indicator is connected to the electronic tags of both the weighing assembly and the steel cylinder.

[0006] The frame consists of a vertical square tube that is open at the top and bottom and open at the rear. The upper end of the vertical square tube is equipped with a housing, and the lower end of the vertical square tube is sealed and raised above the ground. The front side panels of the vertical square tube and the housing are both arc-shaped plates adapted to the shape of the steel cylinder. The weighing head is located in the upper part of the housing. The top of the housing is fixedly installed with a head cover plate, which is fixedly fitted around the upper part of the weighing head. The top of the weighing head is equipped with a display screen that is fixedly embedded on the outer surface of the head cover plate. Two wheels are respectively rotated and installed on the lower part of the left and right side panels of the vertical square tube. A semi-circular clamp guard plate is fixedly welded to the upper part of the front side of the vertical square tube. The center line of the semi-circular clamp guard plate is set vertically and the open side faces forward. The semi-circular clamp guard plate is adapted to the shape of the steel cylinder.

[0007] The handlebars include two bar stems that are spaced apart from each other and arranged in parallel. The bar stems are arranged in the front-to-back direction. A handle is fixedly connected between the rear ends of the two bar stems. The front ends of the two bar stems are respectively located on the left and right sides of the chassis. A pivot is fixedly installed on the opposite side of the front ends of the two bar stems, which is arranged horizontally in the left-to-right direction. The front ends of the two bar stems are rotatably mounted on the lower middle part of the left and right side panels of the chassis through the corresponding pivots.

[0008] There are two sets of handlebar opening and closing mechanisms arranged symmetrically on the left and right sides. The handlebar opening and closing mechanism on the left side includes a ratchet and a pawl. The ratchet is fitted inside the left pivot and connected to the left pivot via a key drive. The pawl is inclined and positioned directly above the ratchet, with the front lower than the rear. The rear end of the pawl is hinged to the rear side wall of the chassis via a first pin arranged horizontally in the left and right direction. The middle part of the pawl is connected to the rear side wall of the chassis between the ratchet and the pawl via a tension spring. The front end of the pawl is pressed tightly into the tooth groove of the ratchet. A pull cable is fixedly connected to the upper side of the front end of the pawl. The upper end of the pull cable passes upward through the head cover and is provided with a pull head. The pull cable, ratchet, pawl and tension spring constitute a pull cable switch.

[0009] The weighing assembly includes a weighing base, a cylinder holder, and a load cell. The weighing base is horizontally positioned on the lower front side of the vertical square tube. The weighing base is a box structure with an open top. Steel brackets are fixedly connected between the left side of the weighing base and the lower left side of the vertical square tube, and between the right side of the weighing base and the lower right side of the vertical square tube. A support is fixedly installed inside the weighing base, and the cylinder holder is mounted on the support. A groove is provided in the middle of the support, and the load cell is embedded in the groove. The bottom center of the cylinder holder is pressed against the top of the load cell. The load cell is connected to the weighing meter via a communication cable.

[0010] The heating assembly includes a semi-circular annular tube with its center line vertically aligned and its open side facing forward. A rectangular notch with openings on the front, left, and right sides is located on the lower middle side of the vertical square tube. The middle portion of the semi-circular annular tube is fixedly embedded in the rectangular notch. The inner arc plate of the semi-circular annular tube is aligned vertically with the semi-circular clamp guard plate and has the same dimensions. The left side of the middle portion of the outer arc plate of the semi-circular annular tube is aligned with the left side plate of the vertical square tube, and the outer arc plate of the semi-circular annular tube... A reinforcing rib is welded between the right side of the arc plate and the right side plate of the vertical square tube. Both sides of the semi-circular annular tube curve forward. The left side of the semi-circular annular tube is open. A circular arc partition, concentric with the semi-circular annular tube, is fixedly installed circumferentially inside the semi-circular annular tube. This circular arc partition divides the internal annular cavity of the semi-circular annular tube into two receiving annular cavities. The right edge of the circular arc partition is located inside the right side of the semi-circular annular tube, and the left edge is located inside the semi-circular annular tube. At the left opening of the tube, the right side of the left opening of the semi-circular tube has an integrally formed folded edge that bends to the left and back. The left edge of the arc-shaped partition is fixedly overlapped with the left side of the folded edge, sealing the left opening of the front receiving ring cavity. Both receiving ring cavities are equipped with electric heating elements, the shape of which is the same as that of the arc-shaped partition. The front electric heating element is fixed to the inner wall of the inner arc plate of the semi-circular tube, and the rear electric heating element slides circumferentially on the rear arc surface of the arc-shaped partition. A long strip handle is fixedly connected to the left side of the rear electric heating element, which is sealed at the left opening of the rear storage ring cavity. A hook is provided in the middle of the front side of the long strip handle. An elastic hanging ring that cooperates with the hook is provided on the outer right side of the semi-circular belt tube. A pull cord device is provided on the right side of the inner right side of the semi-circular belt tube, located on the right side of the arc partition. The wire take-up end of the pull cord device is fixedly connected to the middle of the right edge of the rear electric heating element. The power supply module is electrically connected to the two electric heating elements.

[0011] The power supply module is fixedly installed inside the vertical square tube. Both the left and right sides of the vertical square tube are equipped with maintenance covers that can be detached by screws. The lower middle part of the maintenance cover has evenly spaced heat dissipation mesh holes. The lower part of the right maintenance cover is fixedly installed with a power socket. The internal circuit of the power socket is electrically connected to the power supply module. An air switch is fixedly installed in the middle of the right maintenance cover. The air switch is set on the circuit between the power supply module and the electric heating element to control the power supply to the electric heating element.

[0012] The foldable steel cylinder weighing and heating trolley also includes a foldable auxiliary support wheel mechanism, which includes a support leg, an auxiliary wheel, a first connecting rod, and a second connecting rod. The rear plate of the vertical square tube is a channel steel that is open at both ends and has an open rear side. The support leg is vertically set in a rectangular groove in the rear plate of the vertical square tube. The auxiliary wheel is installed at the lower end of the support leg. The upper end of the support leg is hinged to the upper part of the rectangular groove in the rear plate of the vertical square tube by a second pin set horizontally in the left-right direction. A first elongated hole is vertically opened along the bottom edge of the groove on the upper side of the rear plate of the vertical square tube. The four sides of the first elongated hole are fixedly connected to the front plate of the vertical square tube by a horizontal support square tube. A second elongated hole is opened in the middle of the upper side of the front plate of the vertical square tube, corresponding to the front and back of the first elongated hole. The lower side of the second elongated hole is aligned with the lower side of the first elongated hole, and the upper side of the second elongated hole is lower than the upper side of the first elongated hole. The left and right sides of the second elongated hole are respectively aligned with the first elongated hole. The left and right sides are aligned front and back. The first connecting rod is vertically set inside the horizontal support square tube. The length of the first connecting rod is less than the length of the second long hole. The lower end of the first connecting rod is hinged to the lower front part of the horizontal support square tube and the lower side of the second long hole through a third pin set horizontally in the left and right direction. The second connecting rod is inclined and set behind the first connecting rod with a lower front and a higher rear. The front end of the second connecting rod passes through the first long hole and extends into the horizontal support square tube and is hinged to the upper end of the first connecting rod through a fourth pin set horizontally in the left and right direction. The rear end of the second connecting rod is hinged to the upper side of the support leg through a fifth pin set horizontally in the left and right direction. A limiting pin located behind the first connecting rod is fixedly connected to the lower middle part of the horizontal support square tube in the left and right direction. When the support leg is vertical and completely retracted into the rectangular groove of the rear side plate of the vertical square tube, the upper end of the first connecting rod extends forward out of the second long hole under the push of the second connecting rod and then protrudes out of the outer surface of the front side plate of the vertical square tube.

[0013] The weighing indicator is connected to the electronic tag on the gas cylinder via Bluetooth.

[0014] This invention has outstanding substantive features and significant progress compared to the prior art. Specifically, the working principle of this invention is as follows: During weighing, the foldable steel cylinder weighing and heating trolley is first placed upright, that is, the frame is upright. Then, the steel cylinder is placed vertically on the steel cylinder seat. The weighing sensor directly measures the weight data of the steel cylinder and transmits the weight data to the weighing head through the communication cable. The display screen of the weighing head displays the weighing data. At the same time, the weighing head transmits the data to the corresponding electronic tag of the steel cylinder via Bluetooth so as to record and save the weight data of the steel cylinder and realize the measurement of the remaining gas in the steel cylinder.

[0015] After weighing, manually move the handlebars backward and upward to a certain height. The handlebars are then locked by the ratchet and pawl of the handlebar opening and closing mechanism. Then, the folding cylinder weighing and heating trolley is laid back. During the laying process, the cylinder presses against the first connecting rod under its own weight. The upper end of the first connecting rod pushes the second connecting rod backward. The second connecting rod automatically opens the outriggers until the auxiliary wheel supports the ground. In this state, the folding cylinder weighing and heating trolley is placed at an angle, and the cylinder body is stuck in the semi-circular ring belt and semi-circular clamp guard plate. The folding cylinder weighing and heating trolley carrying the cylinder can be pushed to the desired position by manually pushing the handlebars.

[0016] If a gas cylinder is used in large quantities, the gas inside may absorb heat during vaporization, leading to frost formation and low temperatures, which can affect the smooth discharge of the stored gas. In this case, the operator can use a long, narrow handle to pull out the rear electric heating element from the semi-circular ring, so that the rear electric heating element covers the lower front part of the cylinder. The hook is then attached to the elastic ring. At this point, the plug of the external power supply is inserted into the power socket, providing 220V power to the power supply module. Then, the air switch is turned on, and the two electric heating elements are powered to provide a constant temperature of 50°C to the lower part of the cylinder, thus heating the cylinder during gas use and ensuring the smooth discharge of the stored gas. After the gas is used up, the air switch is turned off, the hook is removed, and the rear electric heating element automatically retracts into the semi-circular ring under the elastic force of the pull cord.

[0017] After the gas cylinder is used up, place the foldable gas cylinder weighing and heating trolley upright. The weighing sensor will measure the weight of the gas cylinder again and transmit the weight data to the weighing head. The weighing head will then transmit the weight data to the electronic tag on the gas cylinder via Bluetooth for weight data update, recording, and storage. At the same time, after the gas cylinder is upright, the first linkage is no longer squeezed by the gas cylinder. The auxiliary wheel and support leg will automatically retract into the rectangular groove on the rear side plate of the vertical square tube under the action of gravity. Then, manually pull up the pull head and pull the corresponding pawl upward through the corresponding pull cable. The corresponding pawl will separate from the corresponding ratchet. Manually lower the handlebars forward and down to the lowest position to complete the folding and storage of the handlebars.

[0018] In summary, this invention can weigh the gas cylinder and upload the weight data to the cylinder's electronic tag, thereby measuring the remaining gas level inside the cylinder. It can also move the cylinder to the desired location and heat it during gas usage to ensure that the gas inside the cylinder can be smoothly discharged. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a front view of the present invention.

[0021] Figure 3 This is the right view of the present invention.

[0022] Figure 4 This is a schematic diagram of the assembly structure of the folding auxiliary support wheel mechanism of the present invention.

[0023] Figure 5 This is a schematic diagram of the assembly structure of the handlebar opening and closing mechanism of the present invention.

[0024] Figure 6 This is a structural cross-sectional view of the weighing component of the present invention.

[0025] Figure 7 This is a cross-sectional view of the heating assembly of the present invention. Detailed Implementation

[0026] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0027] like Figure 1-7 As shown, the folding steel cylinder weighing and heating trolley includes a frame, handlebars, weighing components, a weighing meter 1, a heating component, and a power supply module. Wheels 39, symmetrically mounted on the lower left and right sides of the frame and supported on the ground, are mounted on the left and right sides. The bottom of the frame is higher than the ground. The handlebars are positioned at the rear of the frame in a front-to-back direction. The front end of the handlebars is rotatably mounted on the upper rear side of the frame via a handlebar opening and closing mechanism. The handlebars are folded down and stored on the frame. The weighing components are fixedly mounted on the lower front side of the frame. The weighing meter 1 is fixedly mounted on the top of the frame. The heating component is fixedly mounted on the lower middle front side of the frame. The power supply module is located inside the frame and is electrically connected to the heating component. The weighing meter 1 is connected to the electronic tag signals of both the weighing components and the steel cylinder.

[0028] The frame includes a vertical square tube 2 that is open at the top and bottom and open at the rear. A housing 3 is installed at the upper end of the vertical square tube 2. The lower end of the vertical square tube 2 is sealed and higher than the ground. The front side plates of the vertical square tube 2 and the housing 3 are arc-shaped plates that are adapted to the shape of the steel cylinder. The weighing head 1 is installed in the upper part of the housing 3. The top of the housing 3 is fixedly installed with a head cover plate 4, which is fixedly fitted around the upper part of the weighing head 1. The top of the weighing head 1 is equipped with a display screen 5 that is fixedly embedded on the outer surface of the head cover plate 4. Two wheels 39 are respectively rotatably installed on the lower part of the left and right side plates of the vertical square tube 2. A semi-circular clamp guard plate 6 is fixedly welded to the upper part of the front side of the vertical square tube 2. The center line of the semi-circular clamp guard plate 6 is set vertically and the open side faces forward. The semi-circular clamp guard plate 6 is adapted to the shape of the steel cylinder.

[0029] The handlebars include two bar stems 7 that are spaced apart from each other and arranged in parallel. The bar stems 7 are arranged in the front-to-back direction. A handlebar 8 is fixedly connected between the rear ends of the two bar stems 7. The front ends of the two bar stems 7 are respectively arranged on the left and right sides of the chassis 3. A pivot 9 is fixedly arranged horizontally in the left-to-right direction on the opposite side of the front ends of the two bar stems 7. The front ends of the two bar stems 7 are rotatably mounted on the lower middle part of the left and right side plates of the chassis 3 through the corresponding pivot 9.

[0030] Two sets of handlebar opening and closing mechanisms are symmetrically arranged on the left and right sides. The handlebar opening and closing mechanism on the left side includes a ratchet 10 and a pawl 11. The ratchet 10 is fitted inside the left rotating shaft 9 and is connected to the left rotating shaft 9 via a key drive. The pawl 11 is inclined and positioned directly above the ratchet 10 with the front lower and the rear higher. The rear end of the pawl 11 is hinged to the rear side wall of the housing 3 by a first pin arranged horizontally in the left and right direction. The middle part of the pawl 11 is connected to the rear side wall of the housing 3 between the ratchet 10 and the pawl 11 by a tension spring 12. The front end of the pawl 11 is pressed tightly into the tooth groove of the ratchet 10. A pull cable 13 is fixedly connected to the upper side of the front end of the pawl 11. The upper end of the pull cable 13 passes upward through the head cover plate 4 and is provided with a pull head 14. The pull cable 13, ratchet 10, pawl 11 and tension spring 12 constitute a pull cable switch.

[0031] The weighing assembly includes a weighing base 15, a cylinder holder 16, and a weighing sensor 17. The weighing base 15 is horizontally positioned on the lower front side of the vertical square tube 2. The weighing base 15 is a box structure with an open top. Steel brackets 18 are fixedly connected between the left side of the weighing base 15 and the lower left side of the vertical square tube 2, and between the right side of the weighing base 15 and the lower right side of the vertical square tube 2. A support 19 is fixedly installed inside the weighing base 15. The cylinder holder 16 is mounted on the support 19. A groove is provided in the middle of the support 19. The weighing sensor 17 is embedded in the groove. The bottom center of the cylinder holder 16 is pressed against the top of the weighing sensor 17. The weighing sensor 17 is connected to the weighing meter 1 via a communication cable.

[0032] The heating assembly includes a semi-circular annular tube 20, with its center line vertically aligned and its open side facing forward. The lower middle section of the vertical square tube 2 has a rectangular notch with openings on the front, left, and right sides. The middle part of the semi-circular annular tube 20 is fixedly embedded in the rectangular notch. The inner arc plate of the semi-circular annular tube 20 is vertically aligned with the semi-circular clamping plate 6 and has the same dimensions. The left side of the middle section of the outer arc plate of the semi-circular annular tube 20 is aligned with the left side plate of the vertical square tube 2, and the right side of the middle section of the outer arc plate of the semi-circular annular tube 20 is aligned with... A reinforcing rib plate 21 is welded between the right side plates of the vertical square tube 2. Both sides of the semi-circular annular tube 20 are bent forward. The left side of the semi-circular annular tube 20 is open. An arc-shaped partition plate 22, concentric with the center line of the semi-circular annular tube 20, is fixedly installed circumferentially inside the semi-circular annular tube 20. The arc-shaped partition plate 22 divides the internal annular cavity of the semi-circular annular tube 20 into two receiving annular cavities 23. The right edge of the arc-shaped partition plate 22 is located on the inner right side of the semi-circular annular tube 20, and the left edge of the arc-shaped partition plate 22 is located on the inner right side of the semi-circular annular tube 20. At the left opening, the right side of the left opening of the semi-circular annular tube 20 has an integrally formed folded edge 24 that bends to the left and back. The left edge of the arc-shaped partition 22 is fixedly overlapped with the left side of the folded edge 24, sealing the left opening of the front receiving ring cavity 23. Both receiving ring cavities 23 are provided with electric heating elements 25. The shape of the electric heating elements 25 is the same as that of the arc-shaped partition 22. The front electric heating element 25 is fixed to the inner wall of the inner arc plate of the semi-circular annular tube 20, and the rear electric heating element 25 is circumferentially slidably connected to the rear arc surface of the arc-shaped partition 22. On the upper side, a long strip handle 26 is fixedly connected to the left side of the rear electric heating element 25, which is sealed at the left opening of the rear storage ring cavity 23. A hook is provided in the middle of the front side of the long strip handle 26. An elastic hanging ring that cooperates with the hook is provided on the outer right side of the semi-circular annular belt tube 20. A pull cord device 27 located on the right side of the arc partition 22 is provided on the inner right side of the semi-circular annular belt tube 20. The wire take-up end of the pull cord device 27 is fixedly connected to the middle of the right edge of the rear electric heating element 25. The power supply module is electrically connected to the two electric heating elements 25.

[0033] The power supply module is fixedly installed inside the vertical square tube 2. The left and right sides of the vertical square tube 2 are each detachably installed with a maintenance cover 28 by screws. The lower middle part of the maintenance cover 28 is evenly provided with heat dissipation mesh holes 29. The lower part of the right maintenance cover 28 is fixedly installed with a power socket 30. The internal circuit of the power socket 30 is electrically connected to the power supply module. The middle part of the right maintenance cover 28 is fixedly installed with an air switch 31. The air switch 31 is set on the circuit between the power supply module and the electric heating element 25 to control the power supply of the electric heating element 25.

[0034] The foldable steel cylinder weighing and heating trolley also includes a foldable auxiliary support wheel mechanism, which includes a support leg 32, an auxiliary wheel 33, a first connecting rod 34, and a second connecting rod 35. The rear panel of the vertical square tube 2 is a channel steel that is open at both ends and open at the rear. The support leg 32 is vertically set in a rectangular groove in the rear panel of the vertical square tube 2. The auxiliary wheel 33 is installed at the lower end of the support leg 32. The upper end of the support leg 32 is hinged to the upper part of the rectangular groove in the rear panel of the vertical square tube 2 by a second pin that is horizontally set in the left-right direction. A first elongated hole is vertically formed along the bottom of the groove on the upper side of the rear side plate of the vertical square tube 2. A horizontal support square tube 36 is fixedly connected between the four sides of the first elongated hole and the front side plate of the vertical square tube 2. A second elongated hole 37, corresponding to the first elongated hole, is formed in the middle of the upper side of the front side plate of the vertical square tube 2. The lower side of the second elongated hole 37 is aligned with the lower side of the first elongated hole, and the upper side of the second elongated hole 37 is lower than the upper side of the first elongated hole. The left and right sides of the second elongated hole 37 are aligned with the left and right sides of the first elongated hole, respectively. A first connecting rod 34 is vertically positioned on the horizontal support. Inside the square tube 36, the length of the first connecting rod 34 is less than the length of the second elongated hole 37. The lower end of the first connecting rod 34 is hinged to the lower front part of the horizontal support square tube 36 and near the lower side of the second elongated hole 37 by a third pin arranged horizontally in the left-right direction. The second connecting rod 35 is inclined and arranged behind the first connecting rod 34 with a lower front and a higher rear. The front end of the second connecting rod 35 passes through the first elongated hole and extends into the horizontal support square tube 36, and is hinged to the upper end of the first connecting rod 34 by a fourth pin arranged horizontally in the left-right direction. The rear end of the second connecting rod 35 is hinged to a fourth pin arranged horizontally in the left-right direction. A fifth pin, horizontally positioned to the left and right, is hinged to the upper side of the support leg 32. A limiting pin 38, located behind the first connecting rod 34, is fixedly connected to the lower side of the middle of the horizontal support square tube 36 along the left and right direction. This pin restricts the first connecting rod 34 from excessively tilting backward, thus preventing the support leg 32 from opening too wide. When the support leg 32 is vertical and fully retracted into the rectangular groove of the rear plate of the vertical square tube 2, the upper end of the first connecting rod 34 extends forward through the second elongated hole 37 under the push of the second connecting rod 35, protruding from the outer surface of the front plate of the vertical square tube 2. The limiting pin 38 restricts the backward tilting angle of the first connecting rod 34, preventing the support leg 32 from opening too wide. This ensures a reasonable tilt angle when the frame is tilted, making it easier for workers to grip the handlebars and push the folding steel cylinder weighing and heating trolley with less effort.

[0035] The weighing head 1 is connected to the electronic tag of the gas cylinder via Bluetooth signal.

[0036] The power supply module, hook, elastic hanging ring, and first elongated hole are not shown in the figure.

[0037] The weighing head 1, power supply module, ratchet 10, pawl 11, weighing sensor 17, electric heating element 25, pull cord 27, power socket 30 and air switch 31 are all conventional components that can be purchased on the market. The specific structure and working principle will not be described in detail. The signal transmission and control parts included in this invention are all conventional technologies and do not involve new computer programs.

[0038] The working principle of this invention is as follows: When weighing, the foldable steel cylinder weighing and heating trolley is first placed upright, that is, the frame is upright. Then the steel cylinder is placed vertically on the steel cylinder seat 16. The weighing sensor 17 directly measures the weight data of the steel cylinder and transmits the weight data to the weighing head 1 through the communication cable. The display screen 5 of the weighing head 1 displays the weighing data. At the same time, the weighing head 1 transmits the data to the corresponding electronic tag of the steel cylinder through Bluetooth so as to record and save the weight data of the steel cylinder and realize the measurement of the remaining gas in the steel cylinder.

[0039] After weighing, manually move the handlebars backward and upward to a certain height. The handlebars are then locked by the ratchet 10 and pawl 11 of the handlebar opening and closing mechanism. Then, the folding cylinder weighing and heating trolley is laid back. During the laying process, the cylinder presses against the first connecting rod 34 under its own weight. The upper end of the first connecting rod 34 pushes the second connecting rod 35 backward. The second connecting rod 35 automatically opens the support leg 32 until the auxiliary wheel 33 supports the ground. In this state, the folding cylinder weighing and heating trolley is placed at an angle, and the cylinder body is stuck in the semi-circular ring belt 20 and the semi-circular clamp guard plate 6. The folding cylinder weighing and heating trolley carrying the cylinder can be pushed to the desired position by manually pushing the handlebars.

[0040] If the gas cylinder is used in large quantities, the gas inside the cylinder will absorb heat due to vaporization, causing frost and low temperature, which will affect the smooth discharge of the gas stored inside the cylinder. In this case, the operator will use the long plate handle 26 to pull out the electric heating element 25 from the semi-circular annular belt 20, so that the electric heating element 25 covers the lower front part of the cylinder body. The hook will be hung on the elastic ring. At this time, the plug of the external power supply is inserted into the power socket 30, and the external power supply provides 220V power to the power supply module. Then, the air switch 31 is turned on, and the two electric heating elements 25 are powered to provide a constant temperature of 50°C to the lower part of the cylinder, so as to heat the cylinder during the gas use and ensure the smooth discharge of the gas stored inside the cylinder. When the gas use is over, the air switch 31 is turned off and the hook is removed. The electric heating element 25 on the rear side will automatically retract into the semi-circular annular belt 20 under the elastic force of the pull cord 27.

[0041] After the gas cylinder is used up, the foldable gas cylinder weighing and heating trolley is placed upright. The weighing sensor 17 measures the weight of the gas cylinder again and transmits the weight data to the weighing head 1. The weighing head 1 transmits the weight data to the electronic tag of the gas cylinder via Bluetooth for weight data update, recording and saving. At the same time, after the gas cylinder is upright, the first connecting rod 34 is no longer squeezed by the gas cylinder. The auxiliary wheel 33 and the support leg 32 automatically retract into the rectangular groove of the rear side plate of the vertical square tube 2 under the action of gravity. Then, manually pull up the pull head 14 and pull the corresponding pawl 11 upward through the corresponding pull cable 13. The corresponding pawl 11 separates from the corresponding ratchet 10. Manually lower the handlebars forward and down to the lowest position to complete the folding and storage of the handlebars.

[0042] In summary, this invention can weigh the gas cylinder and upload the weight data to the cylinder's electronic tag, thereby measuring the remaining gas level inside the cylinder. It can also move the cylinder to the desired location and heat it during gas usage to ensure that the gas inside the cylinder can be smoothly discharged.

[0043] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A folding steel cylinder weighing and heating trolley, characterized in that: The system includes a frame, handlebars, weighing assembly, weighing meter, heating assembly, and power supply module. Wheels are symmetrically mounted on the lower left and right sides of the frame and are supported on the ground. The bottom of the frame is higher than the ground. The handlebars are located on the rear side of the frame in the front-to-back direction. The front end of the handlebars is rotatably mounted on the upper rear side of the frame through a handlebar opening and closing mechanism. The handlebars are folded down and stored on the frame. The weighing assembly is fixedly mounted on the lower front side of the frame. The weighing meter is fixedly mounted on the top of the frame. The heating assembly is fixedly mounted on the lower middle front side of the frame. The power supply module is located inside the frame and is electrically connected to the heating assembly. The weighing meter is connected to the electronic tag signals of the weighing assembly and the gas cylinder, respectively. The frame consists of a vertical square tube that is open at the top and bottom and open at the rear. The upper end of the vertical square tube is equipped with a housing, and the lower end of the vertical square tube is sealed and higher than the ground. The front side panels of the vertical square tube and the housing are arc-shaped plates that are adapted to the shape of the steel cylinder. The weighing head is located in the upper part of the housing. The top of the housing is fixedly installed with a head cover plate, which is fixedly fitted around the upper part of the weighing head. The top of the weighing head is equipped with a display screen that is fixedly embedded on the outer surface of the head cover plate. Two wheels are respectively rotated and installed on the lower side of the left and right side panels of the vertical square tube. A semi-circular clamp guard plate is fixedly welded to the upper part of the front side of the vertical square tube. The center line of the semi-circular clamp guard plate is set vertically and the open side faces forward. The semi-circular clamp guard plate is adapted to the shape of the steel cylinder. It also includes a folding auxiliary support wheel mechanism, which comprises a support leg, an auxiliary wheel, a first connecting rod, and a second connecting rod. The rear plate of the vertical square tube is a channel steel that is open at both ends and has an open rear side. The support leg is vertically set in a rectangular groove in the rear plate of the vertical square tube. The auxiliary wheel is installed at the lower end of the support leg. The upper end of the support leg is hinged to the upper part of the rectangular groove in the rear plate of the vertical square tube by a second pin set horizontally in the left-right direction. A first elongated hole is vertically opened along the bottom edge of the groove on the upper side of the rear plate of the vertical square tube. A horizontal support square tube is fixedly connected between the four sides of the first elongated hole and the front plate of the vertical square tube. A second elongated hole is opened in the middle of the upper side of the front plate of the vertical square tube, corresponding to the front and back of the first elongated hole. The lower side of the second elongated hole is aligned with the lower side of the first elongated hole, and the upper side of the second elongated hole is lower than the upper side of the first elongated hole. The left and right sides of the second elongated hole are respectively aligned with the left and right sides of the first elongated hole. The first connecting rod is vertically positioned inside the horizontal support square tube. The length of the first connecting rod is less than the length of the second long hole. The lower end of the first connecting rod is hinged to the lower front part of the horizontal support square tube and the lower side of the second long hole via a third pin arranged horizontally in the left-right direction. The second connecting rod is inclined and positioned behind the first connecting rod with a lower front and a higher rear. The front end of the second connecting rod passes through the first long hole and extends into the horizontal support square tube, and is hinged to the upper end of the first connecting rod via a fourth pin arranged horizontally in the left-right direction. The rear end of the second connecting rod is hinged to the upper side of the support leg via a fifth pin arranged horizontally in the left-right direction. A limiting pin located behind the first connecting rod is fixedly connected to the lower middle part of the horizontal support square tube in the left-right direction. When the support leg is vertical and completely retracted into the rectangular groove of the rear side plate of the vertical square tube, the upper end of the first connecting rod extends forward through the second long hole under the push of the second connecting rod and protrudes from the outer surface of the front side plate of the vertical square tube.

2. The folding steel cylinder weighing and heating trolley according to claim 1, characterized in that: The handlebars include two bar stems that are spaced apart from each other and arranged in parallel. The bar stems are arranged in the front-to-back direction. A handle is fixedly connected between the rear ends of the two bar stems. The front ends of the two bar stems are respectively located on the left and right sides of the chassis. A pivot is fixedly installed on the opposite side of the front ends of the two bar stems, which is arranged horizontally in the left-to-right direction. The front ends of the two bar stems are rotatably mounted on the lower middle part of the left and right side panels of the chassis through the corresponding pivots.

3. The folding steel cylinder weighing and heating trolley according to claim 2, characterized in that: There are two sets of handlebar opening and closing mechanisms arranged symmetrically on the left and right sides. The handlebar opening and closing mechanism on the left side includes a ratchet and a pawl. The ratchet is fitted inside the left pivot and connected to the left pivot via a key drive. The pawl is inclined and positioned directly above the ratchet, with the front lower than the rear. The rear end of the pawl is hinged to the rear side wall of the chassis via a first pin arranged horizontally in the left and right direction. The middle part of the pawl is connected to the rear side wall of the chassis between the ratchet and the pawl via a tension spring. The front end of the pawl is pressed tightly into the tooth groove of the ratchet. A pull cable is fixedly connected to the upper side of the front end of the pawl. The upper end of the pull cable passes upward through the head cover and is provided with a pull head. The pull cable, ratchet, pawl and tension spring constitute a pull cable switch.

4. The folding steel cylinder weighing and heating trolley according to claim 1, characterized in that: The weighing assembly includes a weighing base, a cylinder holder, and a load cell. The weighing base is horizontally positioned on the lower front side of the vertical square tube. The weighing base is a box structure with an open top. Steel brackets are fixedly connected between the left side of the weighing base and the lower left side of the vertical square tube, and between the right side of the weighing base and the lower right side of the vertical square tube. A support is fixedly installed inside the weighing base, and the cylinder holder is mounted on the support. A groove is provided in the middle of the support, and the load cell is embedded in the groove. The bottom center of the cylinder holder is pressed against the top of the load cell. The load cell is connected to the weighing meter via a communication cable.

5. The folding steel cylinder weighing and heating trolley according to claim 1, characterized in that: The heating assembly includes a semi-circular annular tube with its center line vertically aligned and its open side facing forward. A rectangular notch with openings on the front, left, and right sides is located on the lower middle side of the vertical square tube. The middle portion of the semi-circular annular tube is fixedly embedded in the rectangular notch. The inner arc plate of the semi-circular annular tube is aligned vertically with the semi-circular clamp guard plate and has the same dimensions. The left side of the middle portion of the outer arc plate of the semi-circular annular tube is aligned with the left side plate of the vertical square tube, and the outer arc plate of the semi-circular annular tube... A reinforcing rib is welded between the right side of the arc plate and the right side plate of the vertical square tube. Both sides of the semi-circular annular tube curve forward. The left side of the semi-circular annular tube is open. A circular arc partition, concentric with the semi-circular annular tube, is fixedly installed circumferentially inside the semi-circular annular tube. This circular arc partition divides the internal annular cavity of the semi-circular annular tube into two receiving annular cavities. The right edge of the circular arc partition is located inside the right side of the semi-circular annular tube, and the left edge is located inside the semi-circular annular tube. At the left opening of the tube, the right side of the left opening of the semi-circular annular tube has an integrally formed folded edge that bends to the left and back. The left edge of the arc-shaped partition is fixedly overlapped with the left side of the folded edge, sealing the left opening of the front receiving ring cavity. Both receiving ring cavities are equipped with electric heating elements, the shape of which is the same as that of the arc-shaped partition. The front electric heating element is fixed to the inner wall of the inner arc plate of the semi-circular annular tube, and the rear electric heating element slides circumferentially on the rear arc surface of the arc-shaped partition. A long strip handle is fixedly connected to the left side of the rear electric heating element, which is sealed at the left opening of the rear storage ring cavity. A hook is provided in the middle of the front side of the long strip handle. An elastic hanging ring that cooperates with the hook is provided on the outer right side of the semi-circular belt tube. A puller is provided on the right side of the inner right side of the semi-circular belt tube, located on the right side of the arc partition. The wire take-up end of the puller is fixedly connected to the middle of the right edge of the rear electric heating element. The power supply module is electrically connected to the two electric heating elements.

6. The folding steel cylinder weighing and heating trolley according to claim 5, characterized in that: The power supply module is fixedly installed inside the vertical square tube. Both the left and right sides of the vertical square tube are equipped with maintenance covers that can be detached by screws. The lower middle part of the maintenance cover has evenly spaced heat dissipation mesh holes. The lower part of the right maintenance cover is fixedly installed with a power socket. The internal circuit of the power socket is electrically connected to the power supply module. An air switch is fixedly installed in the middle of the right maintenance cover. The air switch is set on the circuit between the power supply module and the electric heating element to control the power supply to the electric heating element.

7. The folding steel cylinder weighing and heating trolley according to claim 1, characterized in that: The weighing indicator is connected to the electronic tag on the gas cylinder via Bluetooth.

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