Guide plate with water cooling device

Abstract

The utility model provides a guide plate with a water cooling device, which is characterized in that the structure of the existing guide plate for hot rolling of seamless steel pipes is improved, that is, a water cooling guide groove arranged along the rolling center line of the guide plate is arranged in a guide plate body; a water outlet hole which is vertically communicated with the water-cooling guide groove is formed in a rolling center line of the working surface of the guide plate body, and water-cooling guide pipes with different structures are arranged in the water-cooling guide groove; during rolling, circulating water cooling and lubrication are carried out between the guide plate and a seamless steel pipe red hot steel billet, so that the failure probability of oxidative wear, abrasive wear, hot cracks and the like of the guide plate at high temperature is greatly reduced, and the service life of the guide plate is greatly prolonged. Through actual working condition tests, the improved guide plate for the hot-rolled seamless steel pipe is very remarkable in anti-abrasion effect, the effect of rolling more than 3000 steel pipes can be achieved, the service life is more than 1.5 times that of an existing guide plate, therefore, the replacement period of the guide plate is prolonged, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless steel pipe rolling, in particular to a guide plate designed with a water cooling device for a hot-rolled seamless steel pipe punching machine. Background Art

[0002] The guide plate used in the production of hot-rolled seamless steel pipes is usually fixed during operation. In the process of perforating hot-rolled seamless steel pipes, in addition to the guiding function, the guide plate is also required to limit the lateral deformation of the steel pipe and increase the closure of the hole type. At the same time, it must withstand the impact of red-hot steel billets at a temperature of 1200-1270℃, as well as the compressive stress under huge sliding friction and resistance to cold and hot shocks and other harsh working conditions. Therefore, the guide plate works under high temperature, strong friction and hot and cold cycles, and the service conditions are very harsh. The main failure forms of the guide plate are oxidation wear, abrasive wear, thermal fatigue and thermal cracking at high temperatures.

[0003] At present, the guide plate structure design used in China is relatively simple, usually made of casting. The main part of the scrap wear is the rolling center line of the guide plate working surface. The average life of the guide plate will fail after completing about 2,000 steel pipes. The guide plate is a consumable part, and it is difficult to repair the failure, and the production cost is high. Every year, a large number of guide plate failures cause great economic losses to enterprises. Utility Model Content

[0004] The utility model proposes a new technical solution for improving the guide plate structure based on the wear failure principle of the guide plate and the problems and deficiencies in the existing structural design of the guide plate for hot-rolled seamless steel pipes. The utility model has been trial-produced many times and adopts a more reasonable structural composition, which greatly enhances the cooling and lubrication functions of the guide plate under high temperature and strong friction working conditions, and significantly improves the performance and service life of the guide plate.

[0005] The technical solution of the utility model is as follows:

[0006] The utility model designs a guide plate with a water cooling device, characterized in that a water cooling guide groove arranged along the rolling center line of the guide plate is provided inside the guide plate body, the water cooling guide groove is a water inlet, and a plurality of water outlet holes vertically connected to the water cooling guide groove are provided on the rolling center line of the working surface of the guide plate body.

[0007] The utility model is also characterized in that the water-cooling guide groove inside the guide plate body can be designed as a longitudinal straight-through water-cooling guide groove, and the two ends of the water-cooling guide groove are water inlets. The water-cooling guide groove can also be designed as a "T"-shaped water-cooling guide groove composed of a longitudinal guide groove and a transverse guide groove, the longitudinal guide groove is arranged along the rolling center line of the guide plate, the transverse guide groove is arranged along the transverse width of the guide plate, and the three ports of the "T"-shaped water-cooling guide groove are water inlets.

[0008] Furthermore, a longitudinal straight water cooling conduit is also provided in the longitudinal straight water cooling guide groove inside the guide plate body of the utility model, and both ends of the longitudinal straight water cooling conduit are water inlets. A water outlet hole vertically connected to the longitudinal straight water cooling conduit is provided on the rolling center line of the working surface of the guide plate body.

[0009] A "T"-shaped water-cooling conduit is arranged in the "T"-shaped water-cooling guide groove inside the guide plate body, the three ports of the "T"-shaped water-cooling conduit are water inlets, and a water outlet hole vertically connected to the "T"-shaped water-cooling conduit is arranged on the rolling center line of the working surface of the guide plate body.

[0010] The utility model is also characterized in that the longitudinal straight water cooling conduit inside the guide plate body is a stainless steel pipe; the "T"-shaped water cooling conduit inside the guide plate body is a stainless steel pipe and is fixedly connected by welding. The guide plate with the water cooling device is formed by integrated casting.

[0011] The utility model improves the existing structure of the guide plate for hot-rolled seamless steel pipes, that is, a water-cooling guide groove arranged along the rolling center line of the guide plate working surface is arranged inside the guide plate body, a water outlet hole vertically connected to the water-cooling guide groove is arranged on the rolling center line of the guide plate working surface, and water-cooling ducts of different structures can be selectively arranged in the water-cooling guide groove; during rolling, the failure probability of oxidation wear, abrasive wear and thermal cracking of the guide plate at high temperature is greatly reduced by circulating water cooling and lubrication between the guide plate and the red-hot steel billet of the seamless steel pipe, and the service life of the guide plate is greatly improved. After actual working condition tests, the improved guide plate for hot-rolled seamless steel pipe has a very significant anti-wear effect, and can achieve the effect of rolling more than 3,000 steel pipes. The service life is more than 1.5 times that of the existing guide plate, thereby extending the replacement cycle of the guide plate and greatly reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the improved guide plate of the utility model; wherein 1 is the guide plate body, and 3 is the water outlet.

[0013] Figure 2 yes Figure 1 Schematic diagram of the longitudinal cross-sectional structure; 1 is the guide plate body, the longitudinal straight water-cooling guide groove is arranged along the rolling center line of the guide plate, and 3 is the water outlet.

[0014] Figure 3 It is a schematic diagram of the longitudinal cross-sectional structure of an embodiment; wherein 1 is the guide plate body, 2 is the longitudinal straight water-cooling conduit, 3 is the water outlet, and both ends of the longitudinal straight water-cooling conduit 2 are water inlets.

[0015] Figure 4It is a schematic diagram of the three-dimensional structure of an embodiment of a "T"-shaped water-cooling conduit; wherein 1 is the guide plate body, 3 is the water outlet, 4 is the longitudinal conduit, and 5 is the transverse conduit.

[0016] Figure 5 yes Figure 4 Schematic diagram of the longitudinal cross-sectional structure; wherein 1 is the guide plate body, 3 is the water outlet, 4 and 5 are "T"-shaped water cooling ducts.

[0017] Figure 6 yes Figure 4 and Figure 5 The top view reflects the top view structure of the "T"-shaped water-cooling duct in the guide plate.

[0018] Figure 7 Schematic diagram of the connection structure of a "T"-shaped water-cooling duct, wherein 4 is the longitudinal duct of the water-cooling duct, and 5 is the transverse duct of the water-cooling duct. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and preferred exemplary embodiments. In order to clearly illustrate the present invention, the structural dimensions and regional ranges in the accompanying drawings may be enlarged or exaggerated, or some graphic structures may not be shown when the text description is clear, but the sizes of these preferred embodiments and structures do not limit the present invention.

[0020] Reference Figure 1 and Figure 2 The utility model is based on several wear and failure conditions of existing hot-rolled seamless steel pipe guide plates in actual use, and proposes an improved water-cooled guide plate with a water cooling device designed on the structure of the existing guide plate. The utility model is characterized in that a water-cooling guide groove arranged along the rolling center line of the guide plate rolling surface is provided in the guide plate body 1 or inside the guide plate body 1, and the water-cooling guide groove is a water inlet. A plurality of water outlet holes 3 vertically connected to the water-cooling guide groove are provided on the rolling center line of the working surface of the guide plate body 1. The water-cooling guide groove in the guide plate body 1 can be set as a longitudinal straight-through water-cooling guide groove, and both ends of the water-cooling guide groove are water inlets. The water-cooling guide groove in the guide plate body 1 can also be designed as a "T"-shaped water-cooling guide groove composed of a longitudinal guide groove and a transverse guide groove, wherein the longitudinal guide groove is arranged along the rolling center line of the guide plate, and the transverse guide groove is arranged along the transverse width of the guide plate. The three ports of the "T"-shaped water-cooling guide groove on the guide plate body 1 are water inlets, and a water outlet hole 3 vertically connected to the longitudinal water-cooling guide groove of the "T"-shaped water-cooling guide groove is arranged on the rolling center line of the working surface of the guide plate body 1. The two water-cooling devices having the longitudinal straight-through water-cooling guide groove or the "T"-shaped water-cooling guide groove in the above-mentioned guide plate body 1 can be formed by direct casting, or by post-casting processing.

[0021] Reference Figure 3 , Figure 3This is one of the implementations of the improved guide plate structure of the utility model. That is, a longitudinal straight-through water-cooling guide groove is provided in the guide plate body 1, and a longitudinal straight-through water-cooling pipe 2 is provided in the longitudinal straight-through water-cooling guide groove, and a plurality of water outlets 3 vertically connected to the longitudinal straight-through water-cooling pipe 2 inside the guide plate body 1 are provided on the rolling center line of the working surface of the guide plate body 1, and the two ends of the longitudinal straight-through water-cooling pipe 2 are water inlets. During the rolling operation, water is introduced from the water inlets at both ends of the longitudinal straight-through water-cooling pipe 2, and is sprayed from the plurality of water outlets 3 vertically connected to the longitudinal straight-through water-cooling pipe 2, so as to directly water-cool and lubricate the running guide plate working surface and the red-hot billet of the seamless steel pipe, so that the direct thermal friction between the guide plate and the billet is greatly reduced, thereby greatly reducing the wear and thermal cracking of the working surface of the guide plate, and significantly improving the service life of the guide plate.

[0022] Reference Figures 4 to 7 , Figure 4 Another embodiment of the utility model is to set a "T"-shaped water cooling guide groove in the guide plate body 1, and install a "T"-shaped water cooling pipe in the "T"-shaped water cooling guide groove. The "T"-shaped water cooling pipe is composed of a longitudinal pipe 4 and a transverse pipe 5. Figure 4 and Figure 5 As shown in the figure, the longitudinal conduit 4 is arranged along the rolling center line of the guide plate, and the transverse conduit 5 is arranged along the transverse width of the guide plate. The longitudinal conduit 4 and the transverse conduit 5 are fixedly connected by welding and cast into one piece with the guide plate body 1. The three ports of the "T"-shaped water cooling conduit on the guide plate body 1 are water inlets, such as Figure 6 As shown, the water outlet 3 on the rolling center line of the working surface of the guide plate body 1 is vertically connected and communicated with the longitudinal water cooling pipe 4 of the "T"-shaped water cooling pipe arranged in the guide plate body 1. During operation, water can be simultaneously inletted from the three water inlets on the guide plate body 1 and sprayed out from the multiple water outlets 3 vertically communicated with the longitudinal pipe 4, forcing water cooling and lubrication of the running guide plate working surface and the red-hot billet of the seamless steel pipe, greatly improving the service life of the guide plate and greatly reducing the failure rate of the guide plate.

[0023] In this embodiment, the longitudinal straight water-cooling conduit 2 and the "T"-shaped water-cooling conduit in the guide plate body 1 are both stainless steel pipes or wear-resistant and heat-corrosion-resistant steel pipes, and the "T"-shaped water-cooling conduit is fixedly connected by welding. Figure 7 As shown. In the utility model, a longitudinal straight water cooling conduit 2 or a "T"-shaped water cooling conduit is arranged in a sand mold during casting, and is formed by integrated casting. The water outlet hole 3 on the rolling center line of the working surface of the guide plate body 1 can be formed directly by casting, or formed by processing after casting.

[0024] The water cooling device of the utility model is arranged below the working surface of the guide plate body 1, and the placement depth thereof is conventionally calculated according to the average wear rate of the guide plate.

[0025] The utility model uses circulating water cooling and lubrication during operation to greatly reduce the failure probability of oxidation wear, abrasive wear and thermal cracking of the guide plate at high temperature, and the service life of the guide plate is increased from an average of 2,000 pieces to more than 3,000 pieces, which is more than 1.5 times that of the existing guide plate, greatly improving the service life of the guide plate. The replacement cycle of the guide plate is extended, the production cost is greatly reduced, and the significant technical progress effect after the improvement is reflected.

[0026] Example 1

[0027] Reference Figures 1 to 3 This embodiment is a structural form in which a longitudinal straight water cooling conduit 2 is arranged and installed inside the guide plate body 1 along the guide plate rolling center line. A stainless steel pipe with a diameter of 38 mm and a wall thickness of 6 mm is selected, and a longitudinal straight water cooling conduit 2 is made according to the length of the existing guide plate body 1, and its two ends are water inlets, such as Figure 3 As shown; the depth of placement is calculated according to the wear amount of the existing guide plate, and the longitudinal straight water-cooling conduit 2 is placed in the guide plate sand mold along the rolling center line of the working surface of the guide plate body 1 during casting, and it is cast inside the center line of the guide plate body 1; after the guide plate body 1 is cast, multiple water outlet holes are processed and manufactured on the rolling center line of the working surface of the guide plate body 1, and multiple water outlet holes 3 that are vertically connected to the longitudinal straight water-cooling conduit inside the guide plate body 1 are processed. This embodiment processes 12 water outlet holes with a diameter of 8mm, and water inflow and outflow are very smooth during the rolling test. The rolling experiment effect of this embodiment is very significant, and its service life is increased from an average of 2,000 to as many as 3,000, which is 1.5 times the life of the existing guide plate. The service life and production efficiency of the guide plate are greatly improved, and the production cost is reduced.

[0028] Example 2

[0029] Reference Figures 4 to 7 This embodiment adopts a structure in which a "T"-shaped water cooling conduit is installed inside the guide plate body 1. A stainless steel pipe with a diameter of 36 mm and a wall thickness of 5 mm is selected and welded to form a "T"-shaped water cooling conduit according to the width and length of the existing guide plate. Figure 7 As shown; the depth of placement is calculated according to the wear amount of the existing guide plate, and the "T"-shaped water-cooling conduit is placed in the guide plate sand mold along the rolling center line of the working surface of the guide plate body 1 during casting, and is cast inside the guide plate body 1, as shown in FIG. Figure 4 , Figure 5 , Figure 6 As shown; after the guide plate body 1 is cast, a plurality of water outlet holes 3 are processed on the rolling center line of the working surface of the guide plate body 1, and a plurality of water outlet holes 3 are processed which are vertically connected to the longitudinal conduit 4 inside the guide plate body 1. In this embodiment, 10 water outlet holes with a diameter of 8 mm are produced, such as Figure 4 and Figure 5This embodiment achieves a utilization efficiency of 3200 steel pipes during actual rolling, and its service life is more than 1.5 times that of the existing guide plate.

[0030] Example 3

[0031] Reference Figure 2 and Figure 3 , and referring to the implementation methods of Examples 1 and 2, this embodiment adopts direct casting to form a guide plate with a water cooling device, and along the rolling center line of the guide plate, a longitudinal straight-through water-cooling guide groove through hole and a water outlet 3 are directly cast inside the guide plate body 1; the two ends of the straight-through water-cooling guide groove through hole are water inlets, and the water outlet 3 on the working surface of the guide plate body 1 is vertically connected to the straight-through water-cooling guide groove through hole. After the casting is completed and used in practice, the use effect of reducing the wear of the guide plate and increasing the service life of the guide plate is also achieved. Its rolling effect reaches as many as 3,000 pieces, which is more than 1.5 times the life of the existing guide plate.

[0032] The above are only preferred embodiments of the present invention. For ordinary technicians in this technical field, various improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A guide plate with a water cooling device, characterized in that: A water cooling guide groove is arranged along the rolling center line of the guide plate inside the guide plate body, and the water cooling guide groove is a water inlet. A plurality of water outlet holes vertically connected to the water cooling guide groove are arranged on the rolling center line of the working surface of the guide plate body.

2. The guide plate with a water cooling device according to claim 1, characterized in that: The water-cooling guide groove is a longitudinal straight water-cooling guide groove, and both ends of the water-cooling guide groove are water inlets.

3. The guide plate with a water cooling device according to claim 1, characterized in that: The water-cooling guide groove is a "T"-shaped water-cooling guide groove composed of a longitudinal guide groove and a transverse guide groove, wherein the longitudinal guide groove is arranged along the rolling center line of the guide plate, and the transverse guide groove is arranged along the transverse width of the guide plate, and the three ports of the "T"-shaped water-cooling guide groove are water inlets.

4. The guide plate with a water cooling device according to claim 2, characterized in that: A longitudinal straight water cooling conduit is arranged in the longitudinal straight water cooling guide groove, both ends of the longitudinal straight water cooling conduit are water inlets, and a plurality of water outlet holes vertically connected to the longitudinal straight water cooling conduit are arranged on the rolling center line of the working surface of the guide plate body.

5. The guide plate with a water cooling device according to claim 3, characterized in that: A "T"-shaped water-cooling conduit is arranged in the "T"-shaped water-cooling guide groove, and the three ports of the "T"-shaped water-cooling conduit are water inlets. A plurality of water outlet holes vertically connected to the "T"-shaped water-cooling conduit are arranged on the rolling center line of the working surface of the guide plate body.

6. The guide plate with a water cooling device according to claim 4, characterized in that: The longitudinal straight water-cooling conduit is a stainless steel pipe.

7. The guide plate with a water cooling device according to claim 5, characterized in that: The "T"-shaped water-cooling conduit is a stainless steel pipe and is fixedly connected by welding.

8. The guide plate with a water cooling device according to any one of claims 1 to 7, characterized in that: The guide plate with the water cooling device is formed by integral casting.

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