A radial extrusion die with pneumatic door opening

Abstract

A radial extrusion die with pneumatic door opening, which relates to the production equipment of concrete and reinforced concrete pipes, includes a lifting device and a single-opening cylinder body. The lifting device includes a cross beam and two suspension rods, and the two suspension rods are respectively arranged on both sides outside the cylinder body. A bottom support is arranged at the bottom of the inner cavity of the cylinder body, and a plurality of rotating support plates are hinged at the bottom of the cylinder body. A demolding device for opening the cylinder body is connected to the outside of the cylinder body. The demolding device includes a rotating shaft, and the axial direction of the rotating shaft is the same as the axial direction of the cylinder body. A first cylinder is connected to the outside of the cylinder body. The piston rod of the first cylinder is hinged to a first connecting rod, and the first connecting rod is fixedly connected to the rotating shaft. A first rod chamber air pipe and a first rodless chamber air pipe are connected to the first cylinder. Each suspension rod and the cylinder body are respectively detachably connected through a set of air inlet devices. The two sets of air inlet devices are connected to a gas source, one set of air inlet devices is connected to the first rod chamber air pipe, and the other set of air inlet devices is connected to the first rodless chamber air pipe. The invention is applicable to an automated production line.

Description

Technical Field

[0001] The present invention relates to production equipment for concrete and reinforced concrete pipes. Background Art

[0002] At present, when manufacturing pipes by the radial extrusion process, a single-opening mold is lifted by a traveling crane through a sling. The sling includes a cross beam and two suspension rods whose opening distance can be adjusted according to the mold specifications. After the bottom support is loaded into the mold cylinder, the mold is closed. The suspension rods clamp the mold, and the mold is moved to the turntable. The sling is removed, and the turntable drives the mold to rotate to the production station. After the reinforced concrete pipe is formed, the turntable rotates the mold to the initial position. The sling transports the mold to the demolding position and then opens the mold. The opening and closing of the mold are manually operated. For example, in the patent with the patent number ZL201721414011.X and the patent name "A Chain Demolding Device for a Radial Extrusion Mold", this kind of mold is not suitable for an automated production line. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a pneumatically opened radial extrusion mold suitable for an automated production line.

[0004] The purpose of the present invention is achieved as follows: A pneumatically opened radial extrusion mold includes a sling and a single-opening cylinder. The sling includes a cross beam and two suspension rods. The two suspension rods and the cylinder are all vertically arranged, and the two suspension rods are respectively arranged on both sides outside the cylinder. A bottom support is arranged at the bottom of the inner cavity of the cylinder, and a plurality of rotating support plates are hinged at the bottom of the cylinder. By rotating the rotating support plates, the bottom support can be separated from or fixed to the cylinder. A demolding device for opening the cylinder is connected to the outside of the cylinder. The demolding device includes a rotating shaft, and the axial direction of the rotating shaft is the same as the axial direction of the cylinder. A first cylinder is connected to the outside of the cylinder. The piston rod of the first cylinder is hinged to a first connecting rod, and the first connecting rod is fixedly connected to the rotating shaft. A first rod chamber air pipe and a first rodless chamber air pipe are connected to the first cylinder. Each suspension rod and the cylinder are respectively detachably connected through a set of air inlet devices. The two sets of air inlet devices are connected to a gas source, one of the two sets of air inlet devices is connected to the first rod chamber air pipe, and the other set of air inlet devices is connected to the first rodless chamber air pipe.

[0005] Each set of air inlet devices of the present invention includes a vertical ventilation sleeve and a vertical ventilation rod. The two ventilation sleeves are respectively connected to the outer wall of the cylinder. A first air port is respectively arranged on each ventilation sleeve. One of the two first air ports is connected to the first rod chamber air pipe, and the other first air port is connected to the first rodless chamber air pipe. The ventilation rod is connected to the suspension rod, and each ventilation rod is inserted into the corresponding ventilation sleeve. A second air port is respectively arranged on each ventilation rod. One end of the second air port is connected to the gas source, and the other end is communicated with the inner cavity of the ventilation sleeve.

[0006] The present invention is improved on the basis of the existing single-opening mold, and uses the first cylinder to push the demoulding device. The hanger needs to be separated from the mold when placing the mold on the turntable, and the mold needs to be clamped after the reinforced concrete pipe production molding mold is turned out. Therefore, the hanger and the air pipe on the mold must be able to automatically separate and connect, and high-pressure gas can be delivered to the first cylinder on the mold without manual intervention.

[0007] During operation, the hanger clamps the mold, moves the mold to the turntable, and removes the hanger. The turntable drives the mold to rotate to the production station. After the reinforced concrete pipe is formed, the turntable rotates the mold to the initial position. The hanger is moved. Since the distance between the two ventilation rods matches the distance between the two ventilation sleeves on the cylinder, the hanger moves downward, the ventilation rod is aligned with the ventilation sleeve, and the hanger moves upward again, so that the ventilation rod is inserted into the ventilation sleeve. The ventilation rod on the hanger is connected to high-pressure gas, and the high-pressure gas is transported to the ventilation sleeve, and enters the rod cavity or rodless cavity of the first cylinder through the air pipe, so that the first cylinder is extended and retracted, thereby opening or closing the mold to realize automated production.

[0008] In order to ensure the sealing effect, a sealing pad is arranged between the ventilation sleeve and the ventilation rod to prevent air leakage between the ventilation sleeve and the ventilation rod.

[0009] The present invention provides two bottom plates on the outer wall of the cylinder, each bottom plate is provided with an adjustment hole, the length direction of the adjustment hole is consistent with the axial direction of the cylinder, and the bottom plate is connected to the cylinder through bolts passing through the adjustment holes; a sleeve mounting seat is welded on each bottom plate, and each ventilation sleeve is welded to a corresponding sleeve mounting seat; a ventilation rod mounting seat is welded on the suspension rod, and each ventilation rod is welded to a corresponding ventilation rod mounting seat. The design of the bottom plate and the adjustment hole facilitates ensuring the accurate relative position of the ventilation sleeves and the ventilation rods on both sides of the cylinder, and reduces the manufacturing difficulty.

[0010] In order to further enhance the stability of the connection between the hanger and the mold, each hanger is detachably connected to the cylinder through a plug-in device, and each set of plug-in devices includes a vertical outer sleeve and a vertical inner guide rod, and the two outer sleeves are respectively connected to the outer wall of the cylinder; the inner guide rod is connected to the hanger, and each inner guide rod is plugged into the corresponding outer sleeve.

[0011] The plurality of rotating pallets of the present invention are connected in series through the second connecting rod, the lower end of the rotating shaft is connected to the crank, and the crank is connected to the second connecting rod. When the first cylinder drives the rotating shaft to rotate, the crank is also driven to rotate, and the plurality of rotating pallets are rotated simultaneously through the second connecting rod, and the rotating pallets leave the bottom support synchronously.

[0012] The present invention further connects a second cylinder to the outer wall of the cylinder body. The second cylinder is connected to a second rod chamber air pipe and a second rodless chamber air pipe. The other end of the second rod chamber air pipe is connected to the first rod chamber air pipe, and the other end of the second rodless chamber air pipe is connected to the first rodless chamber air pipe. A plurality of rotating support plates are connected in series by a third connecting rod, and the piston rod of the second cylinder is hinged to one of the rotating support plates. The first cylinder drives the rotating shaft to rotate, and only the cylinder body is opened. The rotating support plates are synchronously separated from the support plate by the second cylinder and the third connecting rod.

[0013] The present invention further connects a plurality of third cylinders to the outer wall of the cylinder body. The number of the third cylinders is equal to the number of the rotating support plates. The piston rod of each third cylinder is hinged to the corresponding rotating support plate. Each third cylinder is connected to a third rod chamber air pipe and a third rodless chamber air pipe. The other ends of the plurality of third rod chamber air pipes are all connected to the first rod chamber air pipe, and the other ends of the plurality of third rodless chamber air pipes are all connected to the first rodless chamber air pipe. The first cylinder drives the rotating shaft to rotate, and only the cylinder body is opened. The rotating support plates are separated from the support plate by their respective third cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the first structural schematic diagram of the present invention.

[0015] Figure 2 is Figure 1 the A-A view of the ventilation sleeve and the ventilation rod not drawn in

[0016] Figure 3 is Figure 1 the structural schematic diagram of the air inlet device in

[0017] Figure 4 is Figure 1 the structural schematic diagram of the plug-in device in

[0018] Figure 5 is the second structural schematic diagram of the present invention.

[0019] Figure 6 is Figure 5 the B-B view of the ventilation sleeve and the ventilation rod not drawn in

[0020] Figure 7 is the third structural schematic diagram of the present invention.

[0021] Figure 8 is Figure 7 the C-C view of the ventilation sleeve and the ventilation rod not drawn in DETAILED DESCRIPTION OF THE INVENTION

[0022] Embodiment 1

[0023] As Figure 1As shown in Fig. -4, it is the first radial extrusion die for pneumatic door opening, including a sling and a single-opening cylinder body 2. The sling includes a cross beam 1 and two suspension rods 3. The opening distance of the two suspension rods 3 can be adjusted according to the die specifications. The two suspension rods 3 and the cylinder body 2 are both arranged vertically. The two suspension rods 3 are respectively arranged on both sides outside the cylinder body 2. The cylinder body 2 is formed by hinging two semi-circular parts.

[0024] A demoulding device 4 for opening the cylinder body 2 is connected to the outside of the cylinder body 2. The demoulding device 4 includes a rotating shaft 4-1. The axial direction of the rotating shaft 4-1 is the same as the axial direction of the cylinder body 2. The structure of the demoulding device 4 and the rotating shaft 4-1 adopts the structure of the rabbet plate opening and closing device and the rotating shaft in the patent No. ZL201721414011.X. The demoulding device 4 is driven by a first cylinder 6. The cylinder barrel of the first cylinder 6 is connected to the outside of the cylinder body 2. The piston rod of the first cylinder 6 is hinged to a first connecting rod 5. The first connecting rod 5 is fixedly connected to the rotating shaft 4-1.

[0025] A bottom support 12 is arranged at the bottom of the inner cavity of the cylinder body 2. Four rotating support plates 11 are hinged to the bottom of the cylinder body 2. The four rotating support plates 11 are connected in series through a second connecting rod 13. A crank 4-2 is connected to the lower end of the rotating shaft 4-1. The crank 4-2 is connected to the second connecting rod 13 to achieve synchronous rotation, and at the same time rotate the four rotating support plates 11 to separate or fix the bottom support 12 from the cylinder body 2.

[0026] Each suspension rod 3 and the cylinder body 2 are respectively connected in a separable manner through a set of air inlet devices 22. Each set of air inlet devices 22 includes a vertical ventilation sleeve 7 and a vertical ventilation rod 8. Two bottom plates 24 are arranged on the outer wall of the cylinder body 2. Adjusting holes 26 are respectively arranged on each bottom plate 24. The length direction of the adjusting holes 26 is the same as the axial direction of the cylinder body 2. The bottom plates 24 are connected to the cylinder body 2 through bolts 25 passing through the adjusting holes 26. A sleeve mounting seat 14 is welded on each bottom plate 24. A vertical ventilation sleeve 7 is welded on each sleeve mounting seat 14. A first air port 15 is arranged on each ventilation sleeve 7. One of the first air ports 15 is connected to the rod chamber of the first cylinder 6 through a first rod chamber air pipe 19, and the other first air port 15 is connected to the rodless chamber of the first cylinder 6 through a first rodless chamber air pipe 9. A ventilation rod mounting seat 16 is welded on each suspension rod 3. A vertical ventilation rod 8 is welded on each ventilation rod mounting seat 16. The two ventilation rods 8 and the two ventilation sleeves 7 are arranged in one-to-one correspondence. Each ventilation rod 8 is respectively inserted into the corresponding ventilation sleeve 7. A gasket 18 is arranged between the ventilation sleeve 7 and the ventilation rod 8. A second air port 17 is arranged on the ventilation rod 8. One end of the second air port 17 is connected to the air source and the other end is connected to the inner cavity of the ventilation sleeve 7.

[0027] Each suspension rod 3 is detachably connected to the cylinder 2 through a plug-in device 23, and each set of plug-in devices 23 includes a vertical outer sleeve 27 and a vertical inner guide rod 28, and the two outer sleeves 27 are respectively connected to the outer wall of the cylinder 2. The inner guide rod 28 is connected to the 3 suspension rods, and each inner guide rod 28 is respectively plugged into the corresponding outer sleeve 27.

[0028] During operation, the hanger clamps the mold, moves the mold to the turntable, and removes the hanger. The turntable drives the mold to rotate to the production station. After the reinforced concrete pipe is formed, the turntable rotates the mold to the initial position. The hanger is moved. Since the distance between the two ventilation rods matches the distance between the two ventilation sleeves on the cylinder, the hanger moves downward, the ventilation rod is aligned with the ventilation sleeve, and the hanger moves upward again, so that the ventilation rod is inserted into the ventilation sleeve. The ventilation rod on the hanger is connected to high-pressure gas. The air intake is controlled by a programmable controller, and the high-pressure gas is transported to the ventilation sleeve, and enters the rodless cavity of the first cylinder through the air pipe, so that the first cylinder extends, thereby opening the mold. The rotation of the shaft drives the crank to rotate at the same time, and the crank drives the second connecting rod to rotate the four rotating pallets at the same time, separating the bottom support from the cylinder, demoulding, and realizing automated production. When the mold is opened, the cylinder opens, driving the ventilation sleeve, ventilation rod, outer sleeve and inner guide rod to move in a small range. The moving range is achieved by slight deformation of the hanger.

[0029] Example 2

[0030] like Figure 5 , 6 As shown, it is a radial extrusion die for the second pneumatic door opening, and the outer wall of the cylinder 2 is also connected to the second cylinder 10, the second cylinder 10 is connected to the second rod cavity air pipe 20 and the second rodless cavity air pipe 21, the other end of the second rod cavity air pipe 20 is connected to the first rod cavity air pipe 19, and the other end of the second rodless cavity air pipe 21 is connected to the first rodless cavity air pipe 9. The four rotating support plates 11 are connected in series through the third connecting rod 32, and the piston rod of the second cylinder 10 is hinged to one of the rotating support plates 11. There is no crank in Example 1, and the rest of the structure is the same as Example 1.

[0031] The first cylinder 6 extends to open the cylinder 2. The second cylinder 10 extends, and the third connecting rod 32 drives the four rotating support plates 11 to rotate at the same time, separating the bottom support 12 from the cylinder 2.

[0032] Example 3

[0033] like Figure 7 , 8As shown, it is the third radial extrusion die for pneumatic door opening. Four third cylinders 29 are also connected to the outer wall of the cylinder body 2, and the piston rod of each third cylinder 29 is hinged to the corresponding rotating support plate 11. A third rod chamber air pipe 30 and a third rodless chamber air pipe 31 are connected to each third cylinder 29. The other ends of the four third rod chamber air pipes 30 are all connected to the first rod chamber air pipe 19, and the other ends of the four third rodless chamber air pipes 31 are all connected to the first rodless chamber air pipe 9. There is no crank and second connecting rod in Embodiment 1, and the rest of the structure is the same as that in Embodiment 1.

[0034] The first cylinder 6 extends to open the cylinder body 2. Each rotating support plate 11 is controlled by its respective third cylinder 29 to separate the bottom support 12 from the cylinder body 2.

Claims

1. A radial extrusion die with pneumatic door opening, comprising a sling and a single-opening cylinder body. The sling includes a cross beam and two suspension rods. The two suspension rods and the cylinder body are all arranged vertically, and the two suspension rods are respectively arranged on both sides outside the cylinder body; a bottom support is arranged at the bottom of the inner cavity of the cylinder body, and a plurality of rotating support plates are hinged at the bottom of the cylinder body. Rotating the rotating support plates separates or fixes the bottom support from the cylinder body; a demoulding device for opening the cylinder body is connected to the outside of the cylinder body. The demoulding device includes a rotating shaft, and the axial direction of the rotating shaft is the same as the axial direction of the cylinder body; its characteristics are: A first cylinder is connected to the outside of the cylinder body. The piston rod of the first cylinder is hinged to a first connecting rod, and the first connecting rod is fixedly connected to the rotating shaft. A first rod chamber air pipe and a first rodless chamber air pipe are connected to the first cylinder; each suspension rod and the cylinder body are detachably connected through a set of air inlet devices respectively. The two sets of air inlet devices are connected to an air source. One set of air inlet devices is connected to the first rod chamber air pipe, and the other set of air inlet devices is connected to the first rodless chamber air pipe.

2. The radial extrusion die with pneumatic door opening according to claim 1, characterized in that: Each set of air inlet devices includes a vertical ventilation sleeve and a vertical ventilation rod. The two ventilation sleeves are respectively connected to the outer wall of the cylinder body. A first air port is respectively arranged on each ventilation sleeve. One of the two first air ports is connected to the first rod chamber air pipe, and the other first air port is connected to the first rodless chamber air pipe; the ventilation rod is connected to the suspension rod, and each ventilation rod is inserted into the corresponding ventilation sleeve. A second air port is respectively arranged on each ventilation rod. One end of the second air port is connected to the air source, and the other end is communicated with the inner cavity of the ventilation sleeve.

3. The radial extrusion die with pneumatic door opening according to claim 2, characterized in that: A gasket is arranged between the ventilation sleeve and the ventilation rod.

4. The radial extrusion die with pneumatic door opening according to claim 2, characterized in that: Two bottom plates are arranged on the outer wall of the cylinder body. An adjustment hole is respectively arranged on each bottom plate. The length direction of the adjustment hole is consistent with the axial direction of the cylinder body. The bottom plate is connected to the cylinder body through a bolt passing through the adjustment hole; a sleeve mounting seat is respectively welded on each bottom plate, and each ventilation sleeve is respectively welded on the corresponding sleeve mounting seat; a ventilation rod mounting seat is welded on the suspension rod, and each ventilation rod is respectively welded on the corresponding ventilation rod mounting seat.

5. The radial extrusion die with pneumatic door opening according to claim 1, characterized in that: Each suspension rod and the cylinder body are detachably connected through a plug-in device respectively. Each set of plug-in devices includes a vertical outer sleeve and a vertical inner guide rod. The two outer sleeves are respectively connected to the outer wall of the cylinder body; the inner guide rod is connected to the suspension rod, and each inner guide rod is inserted into the corresponding outer sleeve.

6. The radial extrusion die with pneumatic door opening according to claim 1, characterized in that: A plurality of rotating support plates are connected in series through a second connecting rod. The lower end of the rotating shaft is connected to a crank, and the crank is connected to the second connecting rod.

7. The radial extrusion die with pneumatic door opening according to claim 1, characterized in that: A second cylinder is further connected to the outer wall of the cylinder body. The second cylinder is connected to a second rod chamber air pipe and a second rodless chamber air pipe. The other end of the second rod chamber air pipe is connected to the first rod chamber air pipe, and the other end of the second rodless chamber air pipe is connected to the first rodless chamber air pipe; a plurality of rotating support plates are connected in series through a third connecting rod. The piston rod of the second cylinder is hinged to one of the rotating support plates.

8. The radial extrusion die with pneumatic door opening according to claim 1, characterized in that: A plurality of third cylinders are further connected to the outer wall of the cylinder body. The number of the third cylinders is equal to the number of the rotating support plates. The piston rod of each third cylinder is hinged to the corresponding rotating support plate; a third rod chamber air pipe and a third rodless chamber air pipe are connected to each third cylinder. The other ends of the plurality of third rod chamber air pipes are all connected to the first rod chamber air pipe, and the other ends of the plurality of third rodless chamber air pipes are all connected to the first rodless chamber air pipe.

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