Water-cooling type cooling structure of multi-layer thin-walled pipe die

Abstract

The utility model relates to the technical field of cast iron pipe dies, in particular to a multi-layer thin-wall pipe die water-cooling type cooling structure which comprises a pipe body and a water jacket sleeved outside the pipe body, a cooling channel is formed between the outer wall of the pipe body and the water jacket, a plurality of water injection ports are arranged on the water jacket, and the water injection ports are evenly distributed around the axis of the water jacket. The water injection port penetrates through the water jacket wall body and is communicated with the cooling channel; the axis of the water injection port is vertical to the outer wall of the pipe body; the cooling channel is externally connected with a water tank; according to the utility model, the outer wall of the pipe body is directly, uniformly and comprehensively sprayed by utilizing the plurality of water injection ports, the spraying area is increased, and the water injection ports are vertical to the outer wall of the pipe body, so that cooling water can be directly sprayed to the outer wall of the pipe body, the spraying fall is reduced, and the spraying effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cast iron pipe molds, in particular to a water-cooled cooling structure for multi-layer thin-wall pipe molds. Background Technique

[0002] The ductile iron pipe mold is a mold used for producing ductile iron pipes. When manufacturing, it is necessary to design the structure and shape of the pipe mold according to the specifications and dimensions of the required ductile iron pipe, and then select suitable materials for manufacturing, usually special alloys or high-strength steel with high wear resistance, corrosion resistance and good heat conduction performance. At present, large-diameter cast iron pipes are all produced by the hot mold method centrifugal casting process, and the pipe mold has become the main forming equipment for the hot mold method centrifugal pipe casting. The general pipe mold cooling device adopts a segmented spray cooling method to cool the outer wall of the pipe mold, and by controlling the water flow of different inlet pipes, the effect of uniform cooling of each section of the pipe mold can be achieved.

[0003] For example, Chinese Patent CN217964686U discloses a new type of spray cooling device for facilitating the rapid replacement of pipe molds, including a centrifuge protective cover and a pipe mold idler wheel mechanism, and also includes: a pipe mold socket spray cooling mechanism, a pipe mold spigot spray cooling mechanism, a pipe mold body two-side spray cooling mechanism and a pipe mold body bottom spray cooling mechanism located inside the centrifugal protective cover; the pipe mold socket spray cooling mechanism and the pipe mold spigot spray cooling mechanism have the same structure and are respectively located at the pipe mold socket and the pipe mold spigot end. In the above patent, the pipe mold socket spray cooling mechanism and the pipe mold spigot spray cooling mechanism can rotate. When hoisting and replacing the pipe mold, the semi-circular main pipes on both sides of the socket and spigot open at a certain angle, facilitating the up and down hoisting of the pipe mold; at the same time, the pipe mold body two-side spray cooling mechanism is fixed on the inner wall of the centrifugal protective cover, and the setting of the rotating device ensures that the portal main pipe can be adjusted at any angle along the bottom rotating shaft, suitable for spraying and cooling different pipe mold bodies. Affected by the pipe body spray structure, the above pipe mold spray device can only spray according to a fixed position, and relies on the self-rotation of the pipe mold to ensure uniform spraying. However, when directly spraying the pipe mold, a large amount of cooling water will directly flow away after contacting the pipe mold, and the contact time between the cooling water and the pipe mold is too short, resulting in a reduction in cooling efficiency and waste of water resources.

[0004] Therefore, it is necessary for those skilled in the art to provide a water-cooled cooling structure for multi-layer thin-wall pipe molds to increase the contact time and contact area between the cooling water and the pipe mold, thereby improving the cooling efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a water-cooled cooling structure for multi-layer thin-wall pipe molds to solve the technical problems in the prior art that the pipe mold spray device is affected by the pipe body spray structure, the contact time between the cooling water and the pipe mold is too short, resulting in a reduction in cooling efficiency and waste of water resources.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: A multi-layer thin-walled pipe mold water-cooled cooling structure includes a pipe body and a water jacket sleeved outside the pipe body. A cooling channel is formed between the outer wall of the pipe body and the water jacket. The water jacket is provided with a plurality of water injection ports, which are uniformly arranged around the axis of the water jacket. The water injection ports penetrate the wall of the water jacket and communicate with the cooling channel, and the axis of the water injection port is perpendicular to the outer wall of the pipe body; the cooling channel is externally connected to a water tank, and a spray head is installed in the water injection port.

[0007] Further, the pipe body has a hollow tubular structure inside, and there are shoulders at the ends on the outer wall of the pipe body. One end of the water jacket abuts against the shoulder, and a tail sleeve is fixedly connected by threads to the end of the water jacket away from the shoulder.

[0008] Further, a plurality of sub-water jackets are also provided on the wall of the water jacket. The sub-water jackets have a hollow tubular structure inside, the sub-water jackets are arranged along the axial direction of the water jacket on the outer wall of the water jacket, and some of the water injection ports communicate with the internal cavity of one sub-water jacket.

[0009] Further, there is a water inlet in the middle of the sub-water jacket, and the water inlet communicates with the water tank.

[0010] Further, a plurality of drain ports are provided on the tail sleeve. The drain ports are uniformly arranged around the axis of the tail sleeve and penetrate the wall of the tail sleeve, and the drain ports on the tail sleeve communicate with the water tank.

[0011] Further, the tail sleeve is installed on the water jacket, and the drain ports on the tail sleeve are directly opposite to the cooling channel and communicate with each other.

[0012] Further, the water injection port includes a straight cylinder part and a tapered cylinder part. The straight cylinder part and the tapered cylinder part are interconnected and coaxially arranged. The straight cylinder part communicates with the internal cavity of the sub-water jacket, the tapered cylinder part communicates with the cooling channel, and the spray head is installed in the straight cylinder part.

[0013] Further, there are ball bearings between the pipe body and the water jacket, and there are bearings between the pipe body and the shoulder; there are also the ball bearings between the tail sleeve and the pipe body.

[0014] Further, the end face of the tail sleeve away from the water jacket is a conical surface.

[0015] The beneficial effects of the present utility model are as follows: The present utility model uses a plurality of water injection ports to directly spray the outer wall of the pipe body evenly and comprehensively, improving the spraying area. The water injection ports are perpendicular to the outer wall of the pipe body, so that the cooling water can directly spray against the outer wall of the pipe body, reducing the spraying drop and improving the spraying effect. At the same time, the sprayed cooling water will flow in the cooling channel, further cooling the outer wall of the pipe body. Compared with the prior art that uses a single water pipe to directly spray the outer wall of the pipe body, the spraying area of the present utility model is larger and the spraying effect is better. Description of the Drawings

[0016] Figure 1 is a perspective view of the water-cooled cooling structure of the multi-layer thin-walled tube mold of the present utility model.

[0017] Figure 2 is a right view of the water-cooled cooling structure of the multi-layer thin-walled tube mold of the present utility model.

[0018] Figure 3 is Figure 2 a cross-sectional view along A-A in

[0019] Figure 4 is Figure 3 a partially enlarged schematic view of part A in

[0020] Figure 5 is Figure 3 an isometric schematic view of

[0021] The markings of each component in the attached drawings are as follows: 10, tube body; 11, water jacket; 12, dividing water jacket; 13, water injection port; 131, straight tube part; 132, tapered tube part; 14, water inlet; 15, cooling channel; 16, tail sleeve; 17, drain port; 18, shoulder; 19, tapered surface. Detailed implementation manners

[0022] Now, the present utility model will be described in detail with reference to the attached drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic manner, so it only shows the components related to the present utility model.

[0023] Please refer to Figures 1 to 3 , the present utility model provides a water-cooled cooling structure for a multi-layer thin-walled tube mold, including a tube body 10 and a water jacket 11 sleeved outside the tube body 10, and a cooling channel 15 is formed between the outer wall of the tube body 10 and the water jacket 11.

[0024] During use, the tube body 10 is fixedly installed on a large centrifugal device, and then the water jacket 11 is sleeved outside the tube body 10. The water jacket 11 is installed on a bracket (not shown in the figure), and a water tank (not shown in the figure) is also provided on the bracket to introduce cooling water into the water jacket 11 and receive the exchanged hot water flowing out of the water jacket 11. The water jacket 11 is fixedly arranged relative to the bracket, and the tube body 10 rotates around the axis of the water jacket 11. By injecting cooling water into the water jacket 11 and introducing high-temperature molten iron into the tube body 10, under the drive of the large centrifugal device, the high-temperature molten iron forms an iron pipe in the tube body 10. The cooling water cools the tube body 10, and the cooling water undergoes heat exchange to obtain exchanged hot water and is discharged. By circulating the injection of the cooling water, the wall temperature of the tube body 10 is ensured, preventing high-temperature damage, and at the same time promoting the formation of the iron pipe.

[0025] Further, the tube body 10 has a hollow tubular structure. An axial shoulder 18 is provided at the end on the outer wall of the tube body 10. The water jacket 11 is sleeved outside the tube body 10 and one end abuts against the axial shoulder 18. A tail sleeve 16 is fixedly connected to the end of the water jacket 11 away from the axial shoulder 18 by threads. The present utility model assembles the water jacket 11 onto the tube body 10 to ensure the convenience of replacement and maintenance.

[0026] In this embodiment, a ball (not shown in the figure) is provided between the tube body 10 and the water jacket 11. The ball is fitted and connected within the wall body of the water jacket 11 and part of the ball protrudes from the inner wall surface of the water jacket 11. During installation, the tube body 10 is axially installed into the water jacket 11 along the axis of the water jacket 11, and the outer wall of the tube body 10 abuts against the ball, thereby ensuring point contact between the tube body 10 and the water jacket 11, further reducing the frictional force and improving the rotational stability. A bearing (not shown in the figure) is provided between the water jacket 11 and the axial shoulder 18 to further ensure the rotational stability of the tube body 10 on the water jacket 11.

[0027] Please refer to Figure 4 、 Figure 5 The water jacket 11 is provided with a plurality of water injection ports 13. The water injection ports 13 are evenly arranged around the axis of the water jacket 11. The water injection ports 13 penetrate the wall body of the water jacket 11 and communicate with the cooling channel 15. The axis of the water injection port 13 is perpendicular to the outer wall of the tube body 10. The tail sleeve 16 has an annular structure. The tail sleeve 16 is provided with a plurality of drain ports 17. The drain ports 17 are evenly arranged around the axis of the tail sleeve 16 and penetrate the wall body of the tail sleeve 16. The drain ports 17 communicate with the cooling channel 15. During use, cooling water is introduced into the cooling channel 15 from the water injection ports 13 to cool the tube body 10, and then the cooling water is discharged from the drain ports 17 to complete the cooling.

[0028] The present utility model directly sprays the outer wall of the tube body 10 evenly and comprehensively by using a plurality of water injection ports 13, increasing the spraying area. The water injection ports 13 are perpendicular to the outer wall of the tube body 10, enabling the cooling water to directly spray against the outer wall of the tube body 10, reducing the spraying drop height and improving the spraying effect. At the same time, the sprayed cooling water will flow in the cooling channel 15 to further cool the outer wall of the tube body 10. Compared with the prior art where a single water pipe is used to directly spray the outer wall of the tube body 10, the spraying area of the present utility model is larger and the spraying effect is better.

[0029] In this embodiment, the wall body of the water jacket 11 is further provided with a plurality of sub-water jackets 12. The sub-water jackets 12 have a hollow tubular structure. The sub-water jackets 12 are arranged on the outer wall of the water jacket 11 along the axis of the water jacket 11. Part of the water injection ports 13 communicate with the internal cavity of a sub-water jacket 12. An inlet 14 is provided in the middle of the sub-water jacket 12. The inlet 14 communicates with the water tank.

[0030] In the present utility model, high-pressure cooling water is first introduced into the water distribution sleeve 12 through a booster pump. The high-pressure cooling water flows through the water distribution sleeve 12 into a plurality of water injection ports 13, realizing simultaneous water inlet for the plurality of water injection ports 13 and improving the water inlet efficiency.

[0031] In this embodiment, the water injection port 13 includes a straight cylinder part 131 and a tapered cylinder part 132. The straight cylinder part 131 and the tapered cylinder part 132 are in communication with each other and arranged coaxially. The straight cylinder part 131 communicates with the inner cavity of the water distribution sleeve 12, and the tapered cylinder part 132 communicates with the cooling channel 15. A spray head (not shown in the figure) is installed in the straight cylinder part 131. The spray head is a common spray nozzle on the market.

[0032] In the present utility model, the spray head is arranged in the water injection port 13, so that the cooling water can stably flow from the water distribution sleeve 12 into the cooling channel 15, preventing backflow; at the same time, one end port of the water injection port 13 facing the pipe body 10 is opened in a tapered shape, and the cooling water is sprayed onto the outer surface of the pipe body 10 by using the spray head. Thus, on the premise of a limited number of water injection ports 13, the cooling area directly sprayed by the cooling water can be maximized, thereby improving the use effect of the present utility model.

[0033] Furthermore, the tail sleeve 16 is fixedly connected to the water sleeve 11 by fasteners such as bolts or screws. The drain port 17 on the tail sleeve 16 is directly opposite to the cooling channel 15 and communicates with each other. The balls (not shown in the figure) are also arranged between the tail sleeve 16 and the pipe body 10 to ensure the stability of rotation. The end face of the tail sleeve 16 away from the water sleeve 11 is a conical surface 19 (not marked in the figure) to ensure the smoothness of drainage and reduce blockage. Since scale and other impurities are likely to accumulate during the cooling process, the present utility model is provided with a detachable tail sleeve 16, which is convenient for subsequent replacement and maintenance and reduces the maintenance cost. The drain port 17 on the tail sleeve 16 communicates with the water tank to collect the used cooling water.

[0034] The specific operation mode of the present utility model is as follows: The pipe body 10 is fixedly installed on a large centrifugal device, then the water sleeve 11 is sleeved outside the pipe body 10, the tail sleeve 16 is installed, cooling water is injected into the water sleeve 11, and high-temperature molten iron is introduced into the pipe body 10. Driven by the large centrifugal device, the high-temperature molten iron forms an iron pipe in the pipe body 10, and the cooling water cools the pipe body 10.

[0035] The utility model directly sprays the outer wall of the pipe body 10 evenly and comprehensively by using a plurality of water injection ports 13, so as to increase the spraying area. The water injection ports 13 are perpendicular to the outer wall of the pipe body 10, so that the cooling water can directly spray against the outer wall of the pipe body 10, reducing the spraying drop and improving the spraying effect. At the same time, the sprayed cooling water will flow in the cooling channel 15 to further cool the outer wall of the pipe body 10. Compared with the prior art in which a single water pipe is used to directly spray the outer wall of the pipe body 10, the spraying area of the utility model is larger and the spraying effect is better.

[0036] It can be understood that the present utility model is described by some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the present utility model.

Claims

1. A water-cooled cooling structure for a multi-layer thin-walled pipe mold, comprising a pipe body (10) and a water jacket (11) sleeved outside the pipe body (10), characterized in that, A cooling channel (15) is formed between the outer wall of the pipe body (10) and the water jacket (11). A plurality of water injection ports (13) are provided on the water jacket (11). The water injection ports (13) are evenly arranged around the axis of the water jacket (11). The water injection ports (13) penetrate the wall of the water jacket (11) and communicate with the cooling channel (15). The axis of the water injection port (13) is perpendicular to the outer wall of the pipe body (10). The cooling channel (15) is externally connected to a water tank, and a spray head is installed in the water injection port (13).

2. The water-cooled cooling structure of the multi-layer thin-walled tube mold according to claim 1, wherein The pipe body (10) is a tubular structure with a hollow interior. An axial shoulder (18) is provided at the end on the outer wall of the pipe body (10). One end of the water jacket (11) abuts against the axial shoulder (18), and a tail sleeve (16) is fixedly connected by threads to the end of the water jacket (11) away from the axial shoulder (18).

3. The water-cooled cooling structure of the multi-layer thin-walled tube mold according to claim 1, characterized in that, A plurality of sub-water jackets (12) are further provided on the wall of the water jacket (11). The sub-water jackets (12) are tubular structures with a hollow interior. The sub-water jackets (12) are arranged on the outer wall of the water jacket (11) along the axial direction of the water jacket (11), and some of the water injection ports (13) communicate with the internal cavity of a sub-water jacket (12).

4. The water-cooled cooling structure of the multi-layer thin-walled tube mold according to claim 3, characterized in that, An inlet (14) is provided in the middle of the sub-water jacket (12), and the inlet (14) communicates with the water tank.

5. The water-cooled cooling structure of the multi-layer thin-walled tube mold according to claim 2, characterized in that, A plurality of drain ports (17) are provided on the tail sleeve (16). The drain ports (17) are evenly arranged around the axis of the tail sleeve (16) and penetrate the wall of the tail sleeve (16). The drain ports (17) on the tail sleeve (16) communicate with the water tank.

6. The water-cooled cooling structure of the multi-layer thin-walled tube mold according to claim 5, characterized in that, The tail sleeve (16) is installed on the water jacket (11), and the drain ports (17) on the tail sleeve (16) face the cooling channel (15) and are in communication with each other.

7. The water-cooled cooling structure of the multi-layer thin-walled tube mold according to claim 1, characterized in that The water injection port (13) includes a straight tube portion (131) and a tapered tube portion (132). The straight tube portion (131) and the tapered tube portion (132) are in communication with each other and are coaxially arranged. The straight tube portion (131) communicates with the internal cavity of the sub-water jacket (12), and the tapered tube portion (132) communicates with the cooling channel (15). The spray head is installed in the straight tube portion (131).

8. The water-cooling type cooling structure of the multi-layer thin-walled pipe mold according to claim 2, characterized in that, There are ball bearings between the pipe body (10) and the water jacket (11), and there is a bearing between the pipe body (10) and the axial shoulder (18). There are also ball bearings between the tail sleeve (16) and the pipe body (10).

9. The water-cooled cooling structure of the multi-layer thin-walled tube mold according to claim 8, characterized in that, The end face of the tail sleeve (16) away from the water jacket (11) is a conical surface (19).

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