A device for improving the pipe flow rate in the process of improving the airtightness of ductile iron pipes

Abstract

This invention provides a device for improving the pipe throughput rate in the airtightness process of ductile iron pipes, belonging to the technical field of auxiliary production equipment for cast iron pipes. It includes multiple airtight tanks, a circulating steam pipe, a circulating air duct, a lifting assembly, and a lowering assembly. The multiple airtight tanks are arranged side-by-side, each capable of holding ductile iron pipes. The circulating steam pipe is located above the multiple airtight tanks and is used to dry water stains. The circulating air duct is located in the middle of the circulating steam pipe and has multiple air holes spaced at equal intervals, allowing air to flow through and exit from the air holes. The lifting assembly is used to lift the ductile iron pipes taken from the airtight tanks and place them on the upper end of the circulating steam pipe. The lowering assembly is used to receive the ductile iron pipes output from the circulating steam pipe. This invention solves the technical problem of low pipe throughput rate in the airtightness process of ductile iron pipes, and has the technical effects of improving the pipe throughput rate in the airtightness process of ductile iron pipes, reducing labor costs, and improving work efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary production equipment for ductile iron pipes, and more specifically, it relates to a device for improving the pipe flow rate in the airtightness process of ductile iron pipes. Background Technology

[0002] During the production of centrifugal ductile iron pipes, some pipes need to be inspected for leaks. This is done through an airtightness test using testing equipment (such as an airtightness machine). However, the airtightness test is conducted at a single station, with only one pipe at a time, resulting in low efficiency. Furthermore, water stains remain on the outer surface of the pipe after testing, requiring workers or designated personnel to use a blower to dry them before the pipe can proceed to the next stage. This increases labor costs and reduces overall efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a device for improving the pipe flow rate in the airtightness process of ductile iron pipes, thereby solving the technical problem of low pipe flow rate in the airtightness process of ductile iron pipes.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a device for improving the pipe-passing rate in the airtightness process of ductile iron pipes, comprising:

[0005] Multiple airtight chambers are arranged in parallel, each of which can hold a ductile iron pipe, and each airtight chamber is equipped with an airtight machine for testing the airtightness of the ductile iron pipe.

[0006] A circulating steam pipeline is located above the multiple airtight pools, and steam flows through the circulating steam pipeline for drying water stains on the outer wall of the ductile iron pipe.

[0007] A circulating air duct is located in the middle of the circulating steam pipe. Multiple air holes are evenly spaced on the circulating air duct. Air flows through the circulating air duct and the air can flow out from the multiple air holes. The air holes face the ductile iron pipe.

[0008] A lifting assembly, located on the side of the plurality of airtight pools, is used to lift and place the ductile iron pipe taken out of the airtight pools onto the upper end of the circulating steam pipeline.

[0009] A descending assembly, located on the other side of the airtight pool opposite the lifting assembly, is used to receive the ductile iron pipe output from the circulating steam pipeline and place the ductile iron pipe on the pipe track.

[0010] In one possible implementation, the airtight pool is provided with multiple pairs of support rollers, a socket plug, and a spigot plug. The multiple pairs of support rollers are used to roll and support the ductile iron pipe. The socket plug is placed at the socket end of the ductile iron pipe and is used to block the socket. The spigot plug is placed at the spigot end of the ductile iron pipe and is used to block the spigot. The spigot plug has airtight holes for air intake and exhaust.

[0011] In one possible implementation, the airtight pool is provided with multiple sets of slide rails, and multiple sets of push rods are provided on the slide rails. One end of the socket plug or the spigot plug is connected to the push tip of the push rod, and the other end is used to insert into the socket or spigot of the ductile iron pipe by means of the push rod. The push rod extends and retracts along the axial direction of the ductile iron pipe to push, and the position of the push rod on the slide rail is adjustable.

[0012] In one possible implementation, a control panel is provided outside the airtight pool, and multiple sets of push rods are electrically connected to and controlled by the control panel. A sensor electrically connected to the control panel is provided on the slide rail. The sensor is used to detect the ductile iron pipe above the support roller. When the ductile iron pipe is placed on the support roller, the sensor sends a signal to the control panel, and the control panel controls the operation of the push rods.

[0013] In one possible implementation, the circulating steam pipeline includes:

[0014] The upper circulating steam pipes are arranged in multiple sets in parallel, each of which has steam flowing inside. The circulating air ducts are arranged in multiple sets in parallel and are respectively located in the middle of two adjacent circulating steam pipes.

[0015] Multiple sets of lower circulating steam pipes are arranged in parallel, with steam flowing inside, and are located below and offset from the upper circulating steam pipes; and

[0016] A sealing cover is installed around the outer edge of the lower circulating steam pipe. The sealing cover forms a closed shape in the horizontal plane, and the multiple airtight pools are placed below the space enclosed by the sealing cover.

[0017] In one possible implementation, the device for increasing the pipe flow rate in the airtightness process of ductile iron pipes further includes:

[0018] A support frame is used to connect the upper circulating steam pipe and the lower circulating steam pipe and is placed between the upper circulating steam pipe and the lower circulating steam pipe. The support frame is hollow inside.

[0019] At least one set of heaters is located inside the support frame for heating the ductile iron pipe;

[0020] An orifice plate, located at the upper end of the upper circulating steam pipe, is used to support the ductile iron pipe; and

[0021] A height adjustment component is connected to the support frame and used to adjust the height of the support frame, thereby adjusting the height of the sealing cover fastened to the airtight pool cover. The height adjustment component includes a lifter.

[0022] In one possible implementation, the boosting component includes:

[0023] The pallet has a degree of freedom to move vertically and has an arcuate groove for placing ductile iron pipes.

[0024] A cylinder, connected to the end of the support plate away from the circulating steam pipe, is used to horizontally push the ductile iron pipe to the upper end of the circulating steam pipe; and

[0025] The hoist can move vertically, and its power output end is connected to the end of the pallet away from the circulating steam pipe, which is used to drive the pallet to rise and fall and the height can be controlled.

[0026] In one possible implementation, the circulating steam pipe is inclined, with the end near the lifting component being higher than the end near the lowering component. After being placed on the circulating steam pipe, the ductile iron pipe rolls freely towards the lower end under gravity.

[0027] In one possible implementation, the descent component includes:

[0028] The elevator has a power output end at the top and is connected to a lifting platform, giving it the freedom to move vertically.

[0029] The lifting column, located at the upper end of the lifting platform, has a vertical lifting freedom.

[0030] A movable baffle, connected to the top of the lifting column, is used to block the ductile iron pipe from falling onto the lifting platform after it ascends or descends from the circulating steam pipe. The height of the movable baffle is adjustable using the lifting column.

[0031] A sensor, connected to the movable baffle, is used to detect the ductile iron pipe. When the ductile iron pipe falls, it sends a signal to the lifting column, which then drives the movable baffle to block it.

[0032] In one possible implementation, the hoist includes:

[0033] The frame has an upper height greater than the installation height of the circulating steam pipe. Multiple sprockets are provided on the upper end of the frame, and a chain is wound around the multiple sprockets. The two ends of the chain extend to both sides of the frame.

[0034] A drive motor is located on one side of the frame, with its power output end connected to one end of the chain. The drive motor is used to drive the chain to move and rotate the sprocket. The other end of the chain is used to connect to the end of the pallet. A track is vertically arranged on the side of the frame near the pallet. The end of the pallet is slidably connected to the track and moves up and down along the track by means of the chain.

[0035] The beneficial effects of the device for improving the pipe-passing speed in the airtightness process of ductile iron pipes provided by the present invention are as follows: Compared with the prior art, the device for improving the pipe-passing speed in the airtightness process of ductile iron pipes of the present invention includes multiple airtight pools, a circulating steam pipe, a circulating air duct, a lifting component, and a lowering component. The multiple airtight pools are arranged in parallel, and each airtight pool can hold a ductile iron pipe. The circulating steam pipe is located above the multiple airtight pools and is used to dry water stains on the outer wall of the ductile iron pipe. The circulating air duct is located in the middle of the circulating steam pipe, and multiple air holes are arranged at equal intervals on the circulating air duct. Air flows through the circulating air duct and the air can flow out from the multiple air holes, which face the ductile iron pipe. The lifting component is used to lift the ductile iron pipe taken out of the airtight pool and place it on the upper end of the circulating steam pipe. The lowering component is used to receive the ductile iron pipe output from the circulating steam pipe. This solves the technical problem of low pipe-passing speed in the airtightness process of ductile iron pipes, and has the technical effects of improving the pipe-passing speed in the airtightness process of ductile iron pipes, reducing labor costs, and improving work efficiency. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of a device for improving the pipe flow rate in the airtightness process of ductile iron pipes, provided in an embodiment of the present invention (arrows with dashed lines indicate the direction of pipe movement);

[0038] Figure 2 A top view of the airtight pool structure of a device for improving the pipe flow rate in the airtightness process of ductile iron pipes, provided in an embodiment of the present invention;

[0039] Figure 3A schematic diagram of a circulating steam pipeline structure for an embodiment of the present invention, which provides a device for improving the pipe flow rate in the process of improving the airtightness of ductile iron pipes;

[0040] Figure 4 This is a schematic diagram of a component structure for improving the pipe flow rate in the process of enhancing the airtightness of ductile iron pipes, provided as an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Airtight tank; 11. Support roller; 12. Socket plug; 13. Socket plug; 14. Slide rail; 15. Push rod; 16. Control panel; 17. Sensor; 18. Partition; 2. Circulating steam pipe; 21. Upper circulating steam pipe; 22. Lower circulating steam pipe; 23. Sealing cover; 24. Support frame; 25. Heater; 26. Orifice plate; 27. Height adjustment assembly; 3. Circulating air duct; 31. Air hole; 4. Lifting assembly Components; 41. Pallet; 42. Cylinder; 43. Hoist; 431. Frame; 432. Drive motor; 433. Sprocket; 434. Chain; 435. Track; 436. Roller; 44. Arc groove; 5. Lowering assembly; 51. Lifting machine; 52. Lifting column; 53. Movable baffle; 54. Sensor; 55. Lifting platform; 56. Electric rotary table; 57. Elevating block; 6. Photovoltaic power supply assembly; 7. Pipe rail. Detailed Implementation

[0043] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0044] Please refer to the following: Figures 1 to 4This invention provides a device for improving the pipe-passing speed in the airtightness test of ductile iron pipes. The device includes multiple airtight tanks 1, a circulating steam pipe 2, a circulating air duct 3, a lifting assembly 4, and a lowering assembly 5. The multiple airtight tanks 1 are arranged side-by-side, each capable of holding a ductile iron pipe. Each airtight tank 1 contains an airtightness tester (existing technology, not shown in the figures) for airtightness testing of the ductile iron pipes. The circulating steam pipe 2 is located above the multiple airtight tanks 1, and steam flows through it for drying water stains on the outer wall of the ductile iron pipes. The circulating air duct 3 is located in the middle of the circulating steam pipe 2. Multiple air holes 31 (conical in this embodiment, not fully shown in the figure, but the position and shape of the air holes can be indicated) are provided at equal intervals on the upper part of the circulating air duct 3. Air flows through the circulating air duct 3 and the air can flow out from the multiple air holes 31. The air holes 31 face the ductile iron pipe. The lifting component 4 is located on the side of the multiple airtight pools 1 and is used to lift the ductile iron pipe taken out from the airtight pool 1 and place it on the upper end of the circulating steam pipe 2. The lowering component 5 is located on the other side of the airtight pool 1 opposite to the lifting component 4 and is used to receive the ductile iron pipe output from the circulating steam pipe 2 and place the ductile iron pipe on the pipe track 7.

[0045] This invention provides a device for improving the pipe-passing speed in the airtightness process of ductile iron pipes. Compared with the prior art, multiple airtight tanks 1 are arranged in parallel, each capable of holding a ductile iron pipe. A circulating steam pipe 2 is located above the multiple airtight tanks 1 and is used to dry water stains on the outer wall of the ductile iron pipe. A circulating air duct 3 is located in the middle of the circulating steam pipe 2, and multiple air holes 31 are evenly spaced on the circulating air duct 3. Air flows through the circulating air duct 3 and the air can flow out from the multiple air holes 31, which face the ductile iron pipe. A lifting component 4 is used to lift the ductile iron pipe taken out of the airtight tank 1 and place it on the upper end of the circulating steam pipe 2. A lowering component 5 is used to receive the ductile iron pipe output from the circulating steam pipe 2. This device solves the technical problem of low pipe-passing speed in the airtightness process of ductile iron pipes, and has the technical effects of improving the pipe-passing speed in the airtightness process of ductile iron pipes, reducing labor costs, and improving work efficiency. It also solves the problems of slow water stain removal on cast iron pipes and preventing freezing in winter.

[0046] In this paper, ductile iron pipe can be understood as cast pipe, pipe, or pipe body. Multiple airtight tanks 1 can be used to test the airtightness of the cast pipe. The more airtight tanks 1 there are, the higher the efficiency of the airtightness test. After multiple cast pipes are taken out from multiple airtight tanks 1 at the same time, multiple cast pipes can be dried or blown dry simultaneously. In this application, drying is carried out using a circulating steam pipe 2. The cast pipe is dried of water stains during the rolling process, which is more efficient and faster than the blowing method in the prior art. The cast pipe can be taken out from the airtight tank 1 using a robot or crane, which is available in the prior art. Compared with the prior art, which performs airtightness testing and drying on a single cast pipe, the efficiency is greatly improved. For the same number of cast pipes, it can save airtightness operation time and increase the pipe passage rate of the airtightness process, thereby solving the technical problem proposed in this application.

[0047] This application uses a circulating steam pipe 2 in conjunction with a circulating air duct 3, which can both steam-dry water stains on the cast pipe and blow-dry them with airflow. The simultaneous use of both methods accelerates the drying speed and improves the drying efficiency. In contrast, existing technologies use blowers for drying, which is less efficient and affects the later production schedule of the cast pipe.

[0048] In some embodiments, please refer to Figures 1 to 4 The airtight tank 1 is equipped with multiple pairs of support rollers 11, socket plugs 12, and spigot plugs 13. The support rollers 11 are used to roll and support the ductile iron pipe. The socket plugs 12 are placed on the socket end of the ductile iron pipe and are used to plug the socket. The spigot plugs 13 are placed on the spigot end of the ductile iron pipe and are used to plug the spigot. The spigot plugs 13 have airtight holes for air intake and venting. To allow the cast pipe to rotate within the airtight tank 1, multiple pairs of support rollers 11 are provided. The cast pipe is placed on the support rollers 11 and can rotate, facilitating the inspection of the outer wall quality of the cast pipe or the presence of defects. After inspection and confirmation of no defects, the socket plugs 12 and spigot plugs 13 are moved to plug both ends of the cast pipe, creating a closed space inside, thus enabling airtightness testing. In the prior art, plugging is done manually, while in this embodiment, it is done using automated mechanical equipment, thereby improving operational efficiency and saving operation time. An airtight hole is provided to facilitate the intake and release of air into the cast pipe. An airtightness tester is connected to the airtight hole to perform airtightness testing.

[0049] Specifically, the casting pipe is transported into the airtight pool 1 using existing machinery and equipment, and the same applies to its removal. After removal, it can be placed on the lifting assembly 4.

[0050] To automate airtight operation, in some embodiments, please refer to... Figures 1 to 4 The airtight pool 1 is equipped with multiple sets of slide rails 14. Figure 2(A dashed rectangle is defined in the image). Multiple sets of push rods 15 are installed on the slide rail 14. One end of the socket plug 12 or spigot plug 13 is connected to the push tip of the push rod 15, and the other end is used to insert into the socket or spigot of the ductile iron pipe using the push rod 15. The push rod 15 extends and retracts axially along the ductile iron pipe, and its position on the slide rail 14 is adjustable. By controlling the extension and retraction of the push rod 15, the automated operation of the socket plug 12 and spigot plug 13 can be controlled. Two sets of push rods 15 are configured, located at both ends of the cast pipe and connected to the socket plug 12 and spigot plug 13 respectively. The push rod 15 is an automatic telescopic rod, and its operation is controlled by the control panel.

[0051] In some embodiments, please refer to Figures 1 to 4 An external control panel 16 is installed on the airtight tank 1. Multiple sets of push rods 15 are electrically connected to and controlled by the control panel 16. A sensor 17, electrically connected to the control panel 16, is installed on the slide rail 14. The sensor 17 is used to detect ductile iron pipes above the support roller 11. When the ductile iron pipe is placed on the support roller 11, the sensor 17 sends a signal to the control panel 16, which then controls the push rods 15 to move. When the sensor 17 detects the presence of a cast iron pipe, it sends a signal to the control panel 16, which then controls the push rods 15 to push and extend, thereby automatically blocking the socket plug 12 and the spigot plug 13, achieving the technical effect of automated blocking or clogging.

[0052] Specifically, there are no restrictions on which sensor 17 is used, as long as it can detect the presence of the cast pipe and send a signal to the control panel 16 indicating its presence.

[0053] In some embodiments, please refer to Figures 1 to 4The circulating steam pipeline 2 includes an upper circulating steam pipeline 21, a lower circulating steam pipeline 22, and a sealing cover 23. Multiple sets of upper circulating steam pipelines 21 are arranged in parallel, each containing steam. Multiple circulating air ducts 3 are arranged in parallel and are respectively located in the middle of adjacent circulating steam pipelines 2. Multiple sets of lower circulating steam pipelines 22 are arranged in parallel, each containing steam, and are positioned below and offset from the upper circulating steam pipelines 21. The sealing cover 23 surrounds the outer edge of the lower circulating steam pipelines 22, forming a closed shape in the horizontal plane. Multiple airtight pools 1 are located below the space enclosed by the sealing cover 23. There are gaps between the multiple sets of upper circulating steam pipelines 21, and the circulating air ducts 3 are placed within these gaps. Viewed from left to right in the figure, the upper circulating steam pipelines 21 and circulating air ducts 3 are arranged alternately. The casting pipe moves above the upper circulating steam pipelines 21, thus enabling uniform drying and blowing away of water stains. A set of lower circulating steam pipes 22 is located below the gap in the upper circulating steam pipes 21. The released high temperature rises, thus drying the water stains on the cast pipe. By using a sealing cover 23, some of the heat released from the circulating steam pipes 2 is contained within the space enclosed by the sealing cover 23, preventing heat from dissipating and ensuring that heat can only be discharged upwards or onto the cast pipe. The height of the sealing cover 23 is such that its lower end does not contact the airtight pool 1.

[0054] Multiple airtight pools 1 are separated by partitions 18, allowing multiple cast pipes to be inspected at once instead of just one.

[0055] In some embodiments, please refer to Figures 1 to 4 The device for improving the pipe flow rate in the airtightness process of ductile iron pipes also includes a support frame 24, at least one set of heaters 25, an orifice plate 26, and a height adjustment component 27. The support frame 24 is used to connect the upper circulating steam pipe 21 and the lower circulating steam pipe 22 and is located between the upper circulating steam pipe 21 and the lower circulating steam pipe 22. The support frame 24 is hollow inside. At least one set of heaters 25 is located inside the support frame 24 and is used to heat the ductile iron pipe. The orifice plate 26 is located at the upper end of the upper circulating steam pipe 21 and is used to support the ductile iron pipe. The height adjustment component 27 is connected to the support frame 24 and is used to adjust the height of the support frame 24, thereby adjusting the height of the sealing cover 23 on the airtight pool 1. The height adjustment component 27 includes a lifter. The support frame 24 integrates the upper circulating steam pipe 21 and the lower circulating steam pipe 22 into a single unit. Because the support frame 24 has a perforated structure, the heat emitted by the heater 25 can move upwards and reach the cast pipe, thereby drying water stains. Using the heater 25 further enhances the drying speed of the water stains. The heater 25 is electrically connected to the control panel 16, which allows for control of the heater 25's operation and can be adjusted according to actual conditions.

[0056] To enable the cast pipe to roll on the upper end of the circulating steam pipe 2, an orifice plate 26 is provided. The cast pipe is located on the upper end of the orifice plate 26, and the heat released by the steam, the heat from the heater 25, and the air blown out by the duct can all be discharged to the cast pipe through the orifice plate 26. The orifice plate 26 is flat and has multiple holes evenly distributed to support the rolling of the cast pipe.

[0057] To adjust the height of the steam pipe, it is adjusted in conjunction with the lifting component 4 or the lowering component 5, which can be adjusted via its own lifting mechanism. The height adjustment component 27 and the lifting mechanism are existing technology products, or may be an electric telescopic column, etc., and their operation is controlled by the control panel 16. Of course, the control panel 16 has a corresponding control module.

[0058] In some embodiments, please refer to Figures 1 to 4 The lifting assembly 4 includes a support plate 41, a cylinder 42, and a lifting mechanism 43. The support plate 41 has the freedom to move vertically and has an arc-shaped groove 44 for placing the ductile iron pipe. The cylinder 42 is connected to the end of the support plate 41 away from the circulating steam pipe 2 and is used to push the ductile iron pipe horizontally to the upper end of the circulating steam pipe 2. The lifting mechanism 43 can move vertically, and its power output end is connected to the end of the support plate 41 away from the circulating steam pipe 2, used to drive the support plate 41 to rise and fall, and the height can be controlled. The lifting mechanism 43 is a power machine that can provide power vertically to move the support plate 41 up and down, thereby supporting the lifting and lowering of the ductile iron pipe. When the ductile iron pipe is placed in the arc-shaped groove 44, it will not easily move during the lifting and lowering of the support plate 41. When the support plate 41 reaches a certain height, which is high enough to be delivered to the circulating steam pipe 2, the ductile iron pipe moves to the circulating steam pipe 2 by pushing it with the cylinder 42. With the help of the inclined setting of the circulating steam pipe 2, the ductile iron pipe can roll autonomously.

[0059] Specifically, cylinder 42 is connected to control panel 16, and cylinder 42 can be controlled by operating control panel 16.

[0060] In some embodiments, please refer to Figures 1 to 4 The circulating steam pipe 2 is inclined, with the end near the lifting component 4 having a higher height than the end near the lowering component 5. After being placed on the circulating steam pipe 2, the ductile iron pipe rolls freely towards the lower end under gravity. Preferably, as shown in the figure, the left end of the orifice plate 26 is higher, and the right end is lower, with the angle between the orifice plate 26 and the horizontal plate being less than 3°, enabling the cast iron pipe to roll slowly and autonomously without external force.

[0061] In some embodiments, please refer to Figures 1 to 4The lowering assembly 5 includes a lift 51, a lifting column 52, a movable baffle 53, and a sensor 54. The upper end of the lift 51 is the power output end and is connected to the lifting platform 55, giving it the freedom to move vertically. The lifting column 52 is located at the upper end of the lifting platform 55 and also has the freedom to move vertically. The movable baffle 53 is connected to the top of the lifting column 52. As the ductile iron pipe falls from the circulating steam pipe 2, the movable baffle 53 blocks the ductile iron pipe from falling onto the lifting platform 55. The height of the movable baffle 53 is adjustable by means of the lifting column 52. The sensor 54 is connected to the movable baffle 53 and is used to detect the ductile iron pipe. When the ductile iron pipe falls, it sends a signal to the lifting column 52, which then drives the movable baffle 53 to block it. The height of the lifting platform 55 pushed by the elevator 51 must be less than the height of the circulating steam pipe 2. Even if the cast pipe can roll autonomously to the top of the lifting platform 55, when the sensor 54 detects a falling cast pipe, the lifting column 52 can control the movable baffle 53 to block the cast pipe on the lifting platform 55. Then, the elevator 51 controls the lifting platform 55 to descend, allowing the cast pipe to be transported onto the pipe track 7. At this time, if the cast pipe cannot roll autonomously, it can be pushed and rolled with the help of external force.

[0062] Specifically, the movable baffle 53 is T-shaped, which can block the movement of the casting pipe and also support the sensor 54, which is oriented towards the casting pipe to detect whether it is falling.

[0063] Preferably, an electric rotary table 56 is provided at the lower end of the lifting platform 51, which allows the lifting platform 51 to rotate circumferentially in the horizontal plane, thereby enabling the cast pipe on the lifting platform 55 to be delivered onto the pipe-passing track 7 in any direction. When the height of the lifting platform 51 does not meet the requirements, a shim block 57 can be provided at its bottom or at the bottom of the electric rotary table 56 to increase its height. The height of the shim block 57 can be reasonably selected according to the actual situation. Due to the obstruction of the movable baffle 53, the lifting platform 55 usually needs to rotate 180° before it can deliver the pipe onto the pipe-passing track 7.

[0064] In some embodiments, please refer to Figures 1 to 4The hoist 43 includes a frame 431 and a drive motor 432. The upper end of the frame 431 is higher than the installation height of the circulating steam pipe 2. Multiple sprockets 433 are mounted on the upper end of the frame 431, and a chain 434 is wound around each sprocket. Both ends of the chain 434 extend to both sides of the frame 431. The drive motor 432 is located on one side of the frame 431, with its power output end connected to one end of the chain 434. The drive motor 432 drives the chain 434 to move and rotates the sprockets 433. The other end of the chain 434 is connected to the end of the pallet 41. A track 435 is vertically mounted on the side of the frame 431 near the pallet 41. The end of the pallet 41 is slidably connected to the track 435 and moves up and down along the track 435 with the aid of the chain 434. Through the uniform rotation of the drive motor 432 and the track 435, the pallet 41 can move smoothly during lifting, allowing the chain 434 to move smoothly and the sprockets 433 to rotate at a uniform speed, thus ensuring the smooth lifting of the cast pipe. The process of delivering the cast pipe from pallet 41 to circulating steam pipe 2 can be carried out using existing technologies such as forklifts or cranes.

[0065] Multiple rollers 436 are provided at the lower end of the frame 431 to support the movement of the frame 431, which can function similarly to a forklift. At this time, the casting pipe can be delivered from the pallet 41 to the circulating steam pipe 2 using the hoist 43, without the need to use other moving machinery such as forklifts, thus improving production progress and efficiency.

[0066] Preferably, multiple photovoltaic power supply components 6 are provided on the outer wall of the frame 431, and their power output terminals are connected to the drive motor 432 or other electrical loads in this application to provide power. When it is inconvenient for the hoist 43 to be connected to the mains power, it can also be used normally by using solar power.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for improving the pipe flow rate in the airtightness process of ductile iron pipes, characterized in that, include: Multiple airtight chambers are arranged in parallel, each of which can hold a ductile iron pipe, and each airtight chamber is equipped with an airtight machine for testing the airtightness of the ductile iron pipe. A circulating steam pipeline is located above the multiple airtight pools, and steam flows through the circulating steam pipeline for drying water stains on the outer wall of the ductile iron pipe. A circulating air duct is located in the middle of the circulating steam pipe. Multiple air holes are evenly spaced on the circulating air duct. Air flows through the circulating air duct and the air can flow out from the multiple air holes. The air holes face the ductile iron pipe. A lifting assembly, located on the side of the plurality of airtight pools, is used to lift and place the ductile iron pipe taken out of the airtight pools onto the upper end of the circulating steam pipeline. A descending assembly, located on the other side of the airtight pool opposite to the lifting assembly, is used to receive the ductile iron pipe output from the circulating steam pipeline and place the ductile iron pipe on the pipe track. The airtight pool is equipped with multiple pairs of support rollers, a socket plug, and a spigot plug. The multiple pairs of support rollers are used to roll and support the ductile iron pipe. The socket plug is placed at the socket end of the ductile iron pipe and is used to block the socket. The spigot plug is placed at the spigot end of the ductile iron pipe and is used to block the spigot. The spigot plug has airtight holes for air intake and exhaust.

2. The device for improving the pipe flow rate in the airtightness process of ductile iron pipes as described in claim 1, characterized in that, The airtight pool is equipped with multiple sets of slide rails, and multiple sets of push rods are provided on the slide rails. One end of the socket plug or the spigot plug is connected to the push tip of the push rod, and the other end is used to insert into the socket or spigot of the ductile iron pipe by means of the push rod. The push rod extends and retracts along the axial direction of the ductile iron pipe to push, and the position of the push rod on the slide rail is adjustable.

3. The device for improving the pipe flow rate in the airtightness process of ductile iron pipes as described in claim 2, characterized in that, A control panel is installed outside the airtight pool. Multiple sets of push rods are electrically connected to and controlled by the control panel. A sensor electrically connected to the control panel is installed on the slide rail. The sensor is used to detect the ductile iron pipe above the support roller. When the ductile iron pipe is placed on the support roller, the sensor sends a signal to the control panel, and the control panel controls the operation of the push rod.

4. The device for improving the pipe flow rate in the airtightness process of ductile iron pipes as described in claim 1, characterized in that, The circulating steam pipeline includes: The upper circulating steam pipes are arranged in multiple sets in parallel, each of which has steam flowing inside. The circulating air ducts are arranged in multiple sets in parallel and are respectively located in the middle of two adjacent circulating steam pipes. Multiple sets of lower circulating steam pipes are arranged in parallel, with steam flowing inside, and are located below and offset from the upper circulating steam pipes; and A sealing cover is installed around the outer edge of the lower circulating steam pipe. The sealing cover forms a closed shape in the horizontal plane, and the multiple airtight pools are placed below the space enclosed by the sealing cover.

5. The apparatus for improving the pipe flow rate in the airtightness process of ductile iron pipes as described in claim 4, characterized in that, Devices for improving the pipe flow rate in the process of ensuring the airtightness of ductile iron pipes also include: A support frame is used to connect the upper circulating steam pipe and the lower circulating steam pipe and is placed between the upper circulating steam pipe and the lower circulating steam pipe. The support frame is hollow inside. At least one set of heaters is located inside the support frame for heating the ductile iron pipe; An orifice plate, located at the upper end of the upper circulating steam pipe, is used to support the ductile iron pipe; and A height adjustment component is connected to the support frame and used to adjust the height of the support frame, thereby adjusting the height of the sealing cover fastened to the airtight pool cover. The height adjustment component includes a lifter.

6. The apparatus for improving the pipe flow rate in the airtightness process of ductile iron pipes as described in claim 1, characterized in that, The lifting component includes: The pallet has a degree of freedom to move vertically and has an arcuate groove for placing ductile iron pipes. A cylinder, connected to the end of the support plate away from the circulating steam pipe, is used to horizontally push the ductile iron pipe to the upper end of the circulating steam pipe; and The hoist can move vertically, and its power output end is connected to the end of the pallet away from the circulating steam pipe, which is used to drive the pallet to rise and fall and the height can be controlled.

7. The apparatus for improving the pipe flow rate in the airtightness process of ductile iron pipes as described in claim 1, characterized in that, The circulating steam pipe is set at an incline, with the end closer to the lifting component being higher than the end closer to the lowering component. After the ductile iron pipe is placed on the circulating steam pipe, it rolls freely towards the end with the lower height due to gravity.

8. The apparatus for improving the pipe flow rate in the airtightness process of ductile iron pipes as described in claim 1, characterized in that, The descent component includes: The elevator has a power output end at the top and is connected to a lifting platform, giving it the freedom to move vertically. The lifting column, located at the upper end of the lifting platform, has a vertical lifting freedom. A movable baffle, connected to the top of the lifting column, is used to block the ductile iron pipe from falling onto the lifting platform after it ascends or descends from the circulating steam pipe. The height of the movable baffle is adjustable using the lifting column. A sensor, connected to the movable baffle, is used to detect the ductile iron pipe. When the ductile iron pipe falls, it sends a signal to the lifting column, which then drives the movable baffle to block it.

9. The apparatus for improving the pipe flow rate in the airtightness process of ductile iron pipes as described in claim 6, characterized in that, The hoist includes: The frame has an upper height greater than the installation height of the circulating steam pipe. Multiple sprockets are provided on the upper end of the frame, and a chain is wound around the multiple sprockets. The two ends of the chain extend to both sides of the frame. A drive motor is located on one side of the frame, with its power output end connected to one end of the chain. The drive motor is used to drive the chain to move and rotate the sprocket. The other end of the chain is used to connect to the end of the pallet. A track is vertically arranged on the side of the frame near the pallet. The end of the pallet is slidably connected to the track and moves up and down along the track by means of the chain.

Images