Core rod top cooling device

Abstract

According to the core rod top cooling device provided by the utility model, the convex block is arranged on the outer wall of one end of the water inlet of the cooling water pipe, the groove matched with the convex block is formed in the inner wall of the top rod, and the convex block is welded in the groove, so that the cooling water pipe and the top rod can be firmly connected without influencing the size of the water outlet; when the plug is cooled, cooling water enters the cooling water pipe from the water inlet, enters the extending part through the cooling water pipe and then enters the plug to conduct cooling heat exchange on the plug, water after heat exchange flows out of the water outlet through the gap between the cooling water pipe and the cavity, and water circulation is formed. And cooling water is continuously introduced to efficiently cool the plug, so that the plug is efficiently cooled, and the device is simple in structure and convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe mandrel technology, specifically relating to a mandrel tip cooling device. Background Technology

[0002] In a steelmaking plant, steel billets are smelted into steel pipes using mandrels. One end of the mandrel is equipped with a mandrel, which passes through the hot solid steel billet to form a steel pipe. Because the temperature of the steel billet is very high, the mandrel that passes through the billet needs to be cooled.

[0003] Existing cooling methods such as Figure 1 As shown, the push rod 2 has a cylindrical structure with an internal cavity 21. A cooling water pipe 3 is installed in the cavity 21, with a gap between the cooling water pipe 3 and the cavity 21. The inner wall of one end of the push rod 2 is welded to the outer wall of the cooling water pipe 3, and the welded notch is the outlet 32. The welded end of the cooling water pipe 3 is the inlet 31. The inner wall of the other end of the push rod 2 has a second threaded part 22, which mates with a first threaded part 12 on the outer wall of the extension 11 of the push head 1 to connect the push head 1 and the push rod 2. The extension 11 is a hollow structure, allowing the cooling water pipe 3 to extend into it. When cooling the push head 1, cooling water enters the cooling water pipe 3 through the inlet 31, then enters the extension 11 through the cooling water pipe 3 to contact the push head 1 and exchange heat. The water after heat exchange flows through the gap between the cooling water pipe 3 and the cavity 21 and flows out from the outlet 32, forming a water circulation.

[0004] The disadvantage of this structure is that if the connection between the cooling water pipe and the push rod is to be more secure, multiple welds are required between the outer wall of the cooling water pipe inlet end and the inner wall of the push rod, which will reduce the size of the outlet. If a sufficiently large outlet is required, the number of welds must be reduced, which will make the connection between the cooling water pipe and the push rod less secure, and the two cannot be balanced.

[0005] Therefore, the technical problem to be solved by this utility model is: how to ensure that the cooling water pipe and the push rod can be firmly connected and that the water outlet is large enough to improve the cooling efficiency when cooling the mandrel. Utility Model Content

[0006] To address the technical challenge of ensuring a secure connection between the cooling water pipe and the mandrel while maintaining a sufficiently large outlet to improve cooling efficiency during mandrel cooling, this invention provides a mandrel mandrel head cooling device.

[0007] The specific plan is as follows:

[0008] The utility model provides a kind of mandrel head cooling device, including jacks, the jacks are cylindrical structure and inside is equipped with cavity, cooling water pipe is arranged in cavity, and gap is between cooling water pipe and cavity, the inner wall of the one end of jacks is welded fixed with the outer wall of cooling water pipe, the gap of welding is water outlet, the one end of cooling water pipe welding is water inlet, second threaded portion is equipped on the inner wall of the other end of jacks, and first threaded portion is arranged on the outer wall of the extension of head and is matched with second threaded portion, to connect head and jacks, and the extension is hollow structure, cooling water pipe can be inserted into extension, and the outer wall of the one end of cooling water pipe water inlet is equipped with lug, and the inner wall of jacks is equipped with groove matched with lug at corresponding position of lug, and lug is fixed in groove, and cooling area is arranged in the inside of jacks, and the hollow in the inside of extension is communicated with cooling area.

[0009] The lug is square block, the groove is square slot matched with the lug, and the lug and the groove are welded and fixed.

[0010] The cooling water pipe is hard metal material.

[0011] The utility model has the advantages that:

[0012] The utility model provides a kind of mandrel head cooling device, by being equipped with lug on the one end outer wall of cooling water pipe water inlet, being equipped with the groove matched with lug on the inner wall of jacks, and welding lug in groove, the connection between cooling water pipe and jacks can be firm, and the size of water outlet is not affected, and head is equipped with cooling area inside, to cool head from inside, improve cooling efficiency, and the device structure is simple, and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the schematic diagram of the cooling device of prior art, Figure 1 a is front view, Figure 1 b is side view.

[0014] Figure 2 It is the schematic diagram of the cooling device of the utility model, Figure 2 a is front view, Figure 2 b is side view.

[0015] head 1, extension 11, first threaded portion 12, cooling area 13, jack 2, cavity 21, second threaded portion 22,

[0016] groove 23, cooling water pipe 3, water inlet 31, water outlet 32, lug 33, welding portion 4 DETAILED DESCRIPTION

[0017] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, and based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0018] As shown in Figure 2 The utility model provides a core rod head cooling device, including the jackscrew 2, the jackscrew 2 is cylindrical structure and is equipped with cavity 21 inside, is provided with cooling water pipe 3 in the cavity 21, and the clearance between cooling water pipe 3 and cavity 21 has, and the inner wall of one end of jackscrew 2 is welded with the outer wall of cooling water pipe 3, and the gap of welding is water outlet 32, and the one end of cooling water pipe 3 is welded and is water inlet 31, and the inner wall of the other end of jackscrew 2 is equipped with second threaded portion 22, and second threaded portion 22 cooperates with the first threaded portion 12 of the outer wall of extension 11 of head 1 to connect head 1 with jackscrew 2, and extension 11 is hollow structure, and cooling water pipe 3 can be inserted into extension 11, and the outer wall of one end of water inlet 31 of cooling water pipe 3 is equipped with lug 33, and the inner wall of jackscrew 2 is equipped with recess 23 with lug 33 at the corresponding position, and lug 33 is fixed in recess 23, and the inside of jackscrew 2 is provided with cooling area 13, and cooling area 13 is communicated with the hollow inside extension 11.

[0019] The utility model provides a core rod head cooling device, through setting up lug on the outer wall of one end of cooling water pipe water inlet, setting up recess with lug cooperation on the inner wall of jackscrew, welding lug in recess, can make the connection between cooling water pipe and jackscrew firm, and will not affect the size of water outlet, and the inside of head is provided with cooling area, and the head is cooled from inside, improves the cooling efficiency, and the device structure is simple, convenient to use.

[0020] The first threaded portion 12 is an external thread, and the second threaded portion 22 is an internal thread, and the first threaded portion 12 and the second threaded portion 22 are matched to fixedly connect the head 1 and the jackscrew 2.

[0021] The lug 33 is a square block, the recess 23 is a square groove matched with the lug 33, and the lug 33 and the recess 23 are welded and fixed; the length direction of the square block is consistent with the length direction of the cooling water pipe 3, and the length direction of the square groove is consistent with the length direction of the jackscrew 2, and by increasing the length of the lug 33 and the recess 23, the contact area between the jackscrew 2 and the cooling water pipe 3 can be increased.

[0022] The cooling water pipe 3 is made of hard metal material, so that the cooling water pipe 3 and the jackscrew 2 can be fixedly connected by welding.

[0023] As Figure 1 and Figure 2 shown, the top head 1 has a tip, which is a smooth structure formed by gradually reducing the diameter from the maximum diameter of the top head 1, and the end of the top head 1 away from the tip is provided with an extension 11, which is a hollow cylindrical structure, and the diameter of the extension 11 is smaller than the maximum diameter of the tip, so that the extension 11 forms a step with the maximum diameter of the top head 1, and the hollow inside the extension 11 can accommodate the cooling water pipe 3 to extend in, and the cooling water enters the inside of the extension 11 through the cooling water pipe 3, and then enters the cooling area 13 inside the top head 1 to cool the top head 1 from the inside, improving the cooling efficiency.

[0024] As Figure 1 a and Figure 1 b shown are schematic diagrams of prior art cooling devices, Figure 1 a shows that the inner wall of the top rod 2 is directly welded with the outer wall of one end of the water inlet 31 of the cooling water pipe 3, as shown by the welding portion 4, Figure 1 b shows four welding portions 4, and for the end of the entire device, four water outlets 32 are formed between the four welding portions 4, so it can be seen that the more welding portions 4, the smaller the total water outlet 32, which will affect the backwater after heat exchange.

[0025] As Figure 2 a and 2b shown are schematic diagrams of the cooling device of the utility model, Figure 2 a shows that the outer wall of one end of the water inlet 31 of the cooling water pipe 3 is provided with a protrusion 33, and the inner wall of the top rod 2 is provided with a groove 23 corresponding to the protrusion 33, and the protrusion 33 is welded in the groove 23, and the protrusion 33 is set to an appropriate thickness to ensure the size of the water outlet 32; the protrusion 33 is set to a sufficient length along the length direction of the cooling water pipe 3, and the groove 23 is set to a sufficient length along the length direction of the top rod 2, and the protrusion 33 is set to an appropriate length, so that the connection between the protrusion 33 and the groove 23 is more firm. That is, the utility model can adjust the contact area between the cooling water pipe 3 and the top rod 2 by adjusting the length of the protrusion 33, so that the cooling water pipe 3 and the top rod 2 are welded more firmly, and the size of the water outlet 32 can be adjusted by adjusting the thickness of the protrusion 33, and the length and thickness of the protrusion 33 are reasonably selected, so that the water outlet 32 is large enough, and the cooling water pipe 3 and the top rod 2 can be firmly connected.

[0026] Figure 2 b shows that two protrusions 33 are arranged on the outer wall of the cooling water pipe 3, two water outlets 32 are formed between the two protrusions 33, and the thickness of the protrusion 33 is smaller than that of the welding portion 4, and by comparison Figure 1 b and Figure 2 b can be seen that Figure 2 b, the total water outlet is larger than Figure 1The total water outlet in b.

[0027] The specific working process of the utility model is:

[0028] When the top head 1 is cooled, the cooling water at the water source enters into the inside of the cooling water pipe 3 from the water inlet 31, enters into the inside of the extension part 11 through the cooling water pipe 3, and then reaches the inside of the top head 1, so that the top head 1 is cooled and heat exchanged, the water after heat exchange flows out from the water outlet 32 through the gap between the cooling water pipe 3 and the cavity 21, and water circulation is formed, so that the cooling water is continuously fed to efficiently cool the top head 1.

[0029] The technical means disclosed by the utility model scheme is not only limited to the technical means disclosed by the above-mentioned embodiments, but also includes the technical scheme composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the art, under the premise of not departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A mandrel plug cooling device, comprising a plug rod (2), the plug rod (2) is a cylindrical structure and internally provided with a cavity (21), a cooling water pipe (3) is arranged in the cavity (21), and a gap is formed between the cooling water pipe (3) and the cavity (21); the inner wall of one end of the plug rod (2) is welded with the outer wall of the cooling water pipe (3), the welded gap is a water outlet (32), the welded end of the cooling water pipe (3) is a water inlet (31), a second threaded part (22) is arranged on the inner wall of the other end of the plug rod (2), the second threaded part (22) is matched with a first threaded part (12) arranged on the outer wall of an extension part (11) of a plug (1) to connect the plug (1) and the plug rod (2), the extension part (11) is a hollow structure, and the cooling water pipe (3) can extend into the inside of the extension part (11), characterized in that: The outer wall of the water inlet (31) of the cooling water pipe (3) is provided with a protrusion (33), the inner wall of the ejector rod (2) is provided with a groove (23) corresponding to the protrusion (33), the protrusion (33) is fixed in the groove (23), and the inside of the ejector rod (2) is provided with a cooling area (13) in communication with the hollow inside the extension part (11).

2. The plug rod cooling device according to claim 1, characterized in that: The protrusion (33) is a square block, and the groove (23) is a square groove matched with the protrusion (33).

3. The mandrel plug cooling device of claim 1, wherein: The cooling water pipe (3) is made of hard metal.

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