Abrasion-resistant pipe outer layer molten steel pouring truck

Abstract

The utility model discloses a wear-resistant pipe outer layer molten steel pouring truck which is characterized in that a chute ladle is fixed at the front part of a trolley, a pouring furnace is positioned behind the chute ladle, and a weight scale is arranged at the bottom of the pouring furnace. And the furnace core is arranged in the center of the pouring furnace and is seated on the bottom plate supported by the supporting blocks through the supporting plate. A through hole corresponding to the weight scale is machined in the center of the bottom plate, and the weight scale is installed at the top end of the lifting cylinder. And the other end of the pouring cylinder is hinged with the trolley. A clamping cylinder is installed on the side plate and connected with an arc-shaped furnace tightening frame, and an arc plate of the furnace tightening frame corresponds to the outer circle of the induction coil. And the pouring furnace tilts around the furnace nozzle shaft to quickly pour. The induction coil is communicated with the hose through a quick-change connector, a fixing block is arranged between the induction coil copper plates at the ends, and the induction coil copper plates are in compacted electric connection with the cable copper plates. Molten steel is weighed before pouring, the size consistency is guaranteed, and the temperature rise of the pouring furnace guarantees the pouring temperature.

Description

TECHNICAL FIELD

[0001] The utility model is applied to centrifugal casting field relates to double metal wear -resistant pipe centrifugal casting, specifically is a kind of outer layer molten steel pouring trolley. BACKGROUND

[0002] Double metal wear -resistant pipe is mostly centrifugal casting pipe of outer steel and inner high-chromium cast iron, and it belongs to thin-walled pipe. The melting point of outer layer molten steel is high, and for low-carbon carbon steel requiring weldability, the melting point is about 1500 DEG C or above, but the thickness is thin, and the molten steel pouring amount is small. In order to ensure that the outer layer of 3-meter-long wear-resistant pipe can be formed, the ladle chute is usually baked to red, and the molten steel is discharged from the high-temperature melting furnace to minimize the temperature drop of molten steel during pouring, ensure the pouring temperature, and ensure the forming by fast pouring and high pipe mold speed. However, in the case of fast pouring, it is difficult to control the pouring weight, the digital display of the electronic scale suspended by the overhead crane lags behind, and the pouring worker relies on experience to control, resulting in inconsistent thickness of the outer layer of each wear-resistant pipe and poor size consistency. The utility model develops a special pouring trolley for outer layer molten steel, which has the functions of weighing molten steel weight and heating, ensures the pouring weight and pouring temperature of outer layer molten steel, and achieves consistency.

[0003] There are many patent applications for centrifugal casting pouring trolleys, such as CN205110773U, an electric pouring trolley for centrifugal casting, which is used to guide the flow of metal liquid into the pipe mold by fixing the flow channel on the trolley. CN211135456U, a pouring trolley for centrifugal casting pipe machine, is used for centrifugal pouring of nodular cast iron pipe. The trolley is installed with a fan-shaped ladle and a flow channel. The movement of the small-diameter centrifugal machine is changed to the movement of the pouring trolley, and an inoculation device is added to perform inoculation treatment while pouring. CN212495284U, a centrifugal casting double metal pipe machine, CN212495284U, a centrifugal casting double metal pipe machine, CN219335958U, a fixed-point pouring trolley, and CN212495287U, a fixed-point pouring medium-frequency furnace, realize fixed-point pouring and can effectively control the pouring temperature, but the pouring process cannot weigh the pouring molten steel amount. The above pouring schemes cannot solve the problem of ensuring the pouring weight of outer layer molten steel, i.e., cannot guarantee the consistency of the thickness of the outer layer of wear-resistant pipe. UTILITY MODEL CONTENTS

[0004] The technical problem solved by the utility model is to provide a wear-resistant pipe outer layer molten steel pouring trolley, which is installed with a furnace on the trolley to heat and ensure the pouring temperature. The core of the medium-frequency furnace can weigh the molten steel weight, accurately weigh when connecting the molten steel from the melting furnace, realize quantitative pouring, and thus ensure the consistency of the thickness of the outer layer of wear-resistant pipe.

[0005] The technical solution adopted in this utility model is as follows: The wear-resistant pipe outer layer molten steel casting car of this utility model includes a trolley, on which a chute, a casting furnace, and a weighing scale are installed; the chute is fixed at the front of the trolley, the casting furnace is located behind the chute, and the weighing scale is located at the bottom of the casting furnace. The casting furnace includes an outer shell, a furnace frame, and a furnace core; the furnace core is located at the center of the casting furnace and is an integral structure including an induction coil, a fixed column, a permanent layer, and a support plate. The furnace core sits on the bottom plate of the outer shell through the support plate. The outer shell is a steel structure consisting of side plates and a bottom plate. The bottom plate is supported by a support block fixed to the top surface of the trolley. A through hole is machined in the center of the bottom plate, which corresponds to the weighing scale. The weighing scale is installed at the top of a lifting cylinder, which is installed on the trolley. One end of the casting cylinder is hinged to the upper outer side of the side plate, and the other end of the casting cylinder is hinged to the trolley; a clamping cylinder is installed on the side plate, and the clamping cylinder is connected to the furnace frame. The furnace frame is located on the inner side of the side plate and is an arc-shaped steel structure. The arc plate of the furnace frame corresponds to the outer cylinder of the induction coil.

[0006] Furthermore, to enable rapid water and power cutoff by the sensor, the induction coil is connected to the water supply hose via a quick-connect coupling. An induction coil copper plate is welded to the end of the induction coil, and an electrically insulating fixing block is placed between the two induction coil copper plates. The induction coil copper plate and the cable copper plate are electrically connected and compacted using fasteners. The cable copper plate is fixedly connected to an electrically insulating clamping block, which is then firmly secured using fasteners.

[0007] Furthermore, a furnace nozzle shaft is provided at the nozzle position of the outer shell. The nozzle shaft is supported by an arc-shaped groove at the top of a support rod, which is welded integrally with the steel structure of the chute. The casting furnace can tilt around this nozzle shaft to achieve rapid pouring of molten steel. The furnace nozzle of the furnace core is made of shaped bricks, which facilitates separation from the outer shell when weighing molten steel.

[0008] Furthermore, operating cylinders are installed below the top plates on both sides of the trolley, with one end of the operating cylinder fixed to the trolley and the other end fixed to the ground.

[0009] Furthermore, the support blocks are evenly distributed around the circumference to uniformly support the casting furnace.

[0010] Furthermore, an insulating felt is fixed to the arc plate to protect and secure the induction coil.

[0011] Furthermore, the top surface of the outer shell is a top plate, and the top plate and the top of the furnace core retain space for the furnace core to be lifted, so as to facilitate the weighing of molten steel by the weight scale.

[0012] Furthermore, the chute is formed by a rounded, horn-shaped gating channel with a spout installed at the front.

[0013] The beneficial effects of this invention are as follows: Before casting, the molten steel is weighed, ensuring stable weight distribution and consistent outer wall thickness of the wear-resistant tube. The casting furnace has a heating function, guaranteeing the casting temperature. The furnace is operated without an overhead crane, providing equipment support for automated casting and mass production. The molten steel accounts for a large proportion of the total weight, resulting in accurate weighing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 for Figure 1 Top view (without top plate);

[0016] Figure 3 for Figure 1 A left-view diagram;

[0017] Figure 4 for Figure 2 BB cross-sectional diagram;

[0018] Figure 5 This is a schematic diagram of the hydroelectric connection structure of the induction coil;

[0019] Figure 6 for Figure 5 Top view;

[0020] Among them: 1-chute bag, 2-support rod, 3-furnace nozzle shaft, 4-pouring cylinder, 5-outer shell, 6-clamping cylinder, 7-weighing scale, 8-trolley, 9-lifting cylinder, 10-support block, 11-running cylinder, 12-tightening furnace frame, 13-induction coil, 14-insulating felt, 15-fixed column, 16-permanent layer, 17-support plate, 18-top plate;

[0021] 21-Quick-change connector, 22-Hose, 23-Clamping block, 24-Cable copper plate, 25-Induction coil copper plate, 26-Fastener, 27-Fixing block. Detailed Implementation

[0022] The term "purchased" below refers to existing technology. Structures not mentioned or described in detail, such as steel structure reinforcing ribs and chute ladles, are also considered existing technology. The term "front" below refers to the direction of molten steel flow during pouring, i.e., the direction of the pouring. Figure 1 On the right side, the term "side" below refers to both sides of the car, i.e., the attached... Figure 2 The up and down directions.

[0023] The structure of this utility model casting truck is shown in the attached figure. Figures 1-4As shown, including chute bag 1, pouring furnace, trolley 8, weight scale 7 and action cylinder. Chute bag 1, pouring furnace and weight scale 7 are installed on the trolley 8. The action cylinder includes pouring cylinder 4, clamping cylinder 6, lifting cylinder 9 and running cylinder 11.

[0024] Chute bag 1 is fixed in the front of the trolley, the inside is a circular arc transition horn, the front is installed with a chute, and the pouring is inserted into the pipe mold, which is used to guide the molten steel into the high-speed rotating pipe mold.

[0025] The weight scale 7 is purchased, arranged at the bottom of the pouring furnace, installed at the top of the lifting cylinder 9, used for weighing the molten steel poured into the pouring furnace. When weighing the weight of molten steel, only the weight scale supports the core stable, the cooling water and cable of the induction coil are disconnected.

[0026] The pouring furnace is located at the rear of the chute bag, including shell 5, furnace frame 12 and core. The core is a purchased component, arranged in the center of the pouring furnace, including induction coil 13, fixed column 15, permanent layer 16 and support plate 17, which is an integral structure, the fixed column 15 is evenly distributed on the outer circumference of the induction coil, used for fixing the induction coil, the permanent layer is made of refractory mortar, coated in the induction coil and the bottom of the core, the support plate 17 is located below the permanent layer, used for supporting the permanent layer and the induction coil, and the core is seated on the bottom plate of the shell 5 through the support plate. The shell 5 is a steel structure composed of side plates and bottom plates, and the bottom plate is supported by support blocks 10 fixed on the top surface of the trolley, the support blocks are evenly distributed along the circumference of the core center, and are uniformly stressed. A through hole is processed in the center of the bottom plate, which corresponds to the weight scale, providing space for the up and down movement of the weight scale. One end of the pouring cylinder 4 is hingedly installed on the outer side of the upper part of the two side plates of the shell, and the other end of the pouring cylinder 4 is hingedly installed on the trolley. At the position of the furnace nozzle of the shell, a furnace nozzle shaft 3 is arranged, which is supported by the arc-shaped slot at the top of the support rod 2, and the support rod is welded with the steel structure of the chute bag as a whole. The core furnace nozzle is preferably made of shaped brick, which is convenient to separate from the furnace nozzle of the shell when weighing the molten steel. When the cylinder rod of the pouring cylinder is moved, it can drive the shell to lift the core to rotate around the nozzle shaft, realizing the fixed-point pouring of the pouring furnace into the chute bag. The clamping cylinder 6 is fixedly installed on the side plate, and the clamping cylinder 6 is fixedly connected with the furnace frame 12, which is a circular arc steel structure arranged on the inner side of the side plate. The insulating felt 14 is fixed on the arc plate of the furnace frame 12, and the arc of the arc plate corresponds to the outer arc of the induction coil. The insulating felt 14 can protect the induction coil and increase the friction force. The extension and retraction of the cylinder rod of the clamping cylinder can realize the clamping and loosening action of the core.

[0027] The top surface of the shell is a top plate 18, which provides a platform for melting operation. The top plate leaves space with the top of the core, which is convenient for the jacking of the core.

[0028] Below the both sides of the trolley top plate, operating cylinder 11 is installed, one end of the operating cylinder is fixed on the trolley, the other end is fixed on the ground, when the cylinder rod of the operating cylinder is extended or retracted, the trolley can move forward and backward, when the cylinder rod is not in action, the trolley is fixed.

[0029] The water and electricity connection of the induction coil is shown in the attached Figure 5 and the attached Figure 6 As shown in the attached drawings, the hollow induction coil is connected with the water delivery hose 22 through the quick-change connector 21. The end of the induction coil is welded with the induction coil copper plate 25, and the two induction coil copper plates are arranged with the fixed block 27 with good electrical insulation and are fixed on the fixed block 27. The end of the power cable is welded with the cable copper plate 24, the cable copper plate 24 is fixedly connected with the clamping block 23 with good electrical insulation, and the clamping block is fastened through the fastener 26 to realize the compact electrical connection between the cable copper plate 24 and the induction coil copper plate 25.

[0030] When the utility model is used, the quick-change connector on the water delivery hose is disassembled, the hose is removed, the cooling water in the induction coil flows out, during the time of water discharge, the fastener is loosened, the two copper plates are connected and loosened, and the cable is removed. Start the operating cylinder, move the trolley to the front of the outer layer of the steel melting furnace. The cylinder rod of the clamping cylinder is retracted, the outer part of the furnace frame is driven to move outward, and the furnace core is loosened. The cylinder rod of the lifting cylinder is lifted upward, the weight scale passes through the through hole in the bottom plate, and the furnace core is lifted through the supporting plate. At this time, the weight of the furnace core is entirely supported by the weight scale, and the furnace core is not disturbed by the weight of the cooling water pipe, the cable and the clamping frame. After the weight scale is cleared, the melting furnace slowly discharges steel into the pouring furnace, and the weight scale can accurately weigh the weight of the molten steel entering the pouring furnace. After reaching the weight requirement, the cylinder rod of the lifting cylinder falls, the furnace core falls, the supporting plate sits on the bottom plate of the shell, and the furnace core is supported by the bottom plate. The bottom plate is supported by the supporting block. The cylinder rod of the clamping cylinder is extended, the inner part of the furnace frame is driven to move inward, and the furnace core is clamped. The operating cylinder is actuated, the trolley is moved to the specified position, the quick-change connector is connected, the cooling water is supplied, then the cable copper plate is connected, and the fastener is tightened. The steel can be heated by electricity. When the molten steel is heated to the pouring temperature, the operating cylinder is actuated, the spout is inserted into the pipe mold, the pouring cylinder is started, the shell holds the furnace core and rotates around the nozzle shaft, realizes the rapid pouring of the pouring furnace, and the molten steel is poured into the pipe mold through the chute in a short time.

[0031] The utility model uses the pouring furnace to replace the pouring ladle, weighs the molten steel before pouring, ensures the stability of the pouring weight of the outer layer of the wear-resistant pipe, and realizes the consistency of the wall thickness of the outer layer of the wear-resistant pipe. The pouring furnace has a heating function, ensures the pouring temperature, and guarantees the smooth forming of the outer layer of the wear-resistant pipe, improves the product qualification rate. The pouring furnace does not use the overhead crane in the processes of steel receiving, heating and pouring, and provides equipment support for pouring automation and mass production. The weight scale of the utility model only weighs the furnace core and the molten steel, and the weight of the molten steel accounts for a large proportion of the total weight. The utility model can also be applied to the pouring of the high-chromium cast iron metal liquid of the inner layer of the bimetallic wear-resistant pipe.

Claims

1. A wear-resistant pipe outer layer steel ladle car comprising a trolley, characterized in that: The trolley is provided with a chute bag, a pouring furnace and a weight scale; the chute bag is fixed at the front of the trolley, the pouring furnace is located behind the chute bag, and the weight scale is arranged at the bottom of the pouring furnace; The pouring furnace comprises a shell, a furnace frame and a furnace core; the furnace core is arranged at the center of the pouring furnace and is an integrated structure comprising an induction coil, a fixed column, a permanent layer and a support plate, and the furnace core is seated on the bottom plate of the shell through the support plate; The shell is a steel structural member comprising a side plate and a bottom plate, the bottom plate is supported by support blocks fixed on the top surface of the trolley, a through hole is formed in the center of the bottom plate and corresponds to the weight scale, the weight scale is installed at the top end of a lifting cylinder, and the lifting cylinder is installed on the trolley; One end of the pouring cylinder is hinged to the outer upper portion of the side plate, and the other end of the pouring cylinder is hinged to the trolley; a clamping cylinder is installed on the side plate, the clamping cylinder is connected to the furnace frame, the furnace frame is arranged on the inner side of the side plate and is a circular arc steel structural member, and the arc plate of the furnace frame corresponds to the outer cylinder of the induction coil.

2. The abrasion resistant pipe outer layer molten steel pouring cart according to claim 1, characterized in that: The induction coil is connected to a water delivery hose through a quick-change joint; the end of the induction coil is welded with an induction coil copper plate, an electrically insulating fixed block is arranged between the two induction coil copper plates, the induction coil copper plate and a cable copper plate are pressed and electrically connected by fasteners, the cable copper plate is fixedly connected to an electrically insulating clamping block, and the clamping block is fastened and pressed by fasteners.

3. The abrasion resistant pipe outer layer molten steel pouring cart according to claim 1, characterized in that: A nozzle shaft is arranged at the position of the nozzle of the shell, the nozzle shaft is supported by an arc-shaped groove at the top of a support rod, and the support rod is welded with the steel structure of the chute bag as a whole; the nozzle of the furnace core adopts a shaped brick.

4. The abrasion resistant pipe outer layer molten steel pouring cart according to claim 1, characterized in that: A running cylinder is installed below the top plate on both sides of the trolley, one end of the running cylinder is fixed to the trolley, and the other end is fixed to the ground.

5. The abrasion resistant pipe outer layer molten steel pouring cart according to claim 1, characterized in that: The support blocks are uniformly distributed in the circumference.

6. The abrasion resistant pipe outer layer molten steel pouring cart according to claim 1, characterized in that: An insulating felt is fixed on the arc plate.

7. The abrasion resistant pipe outer layer molten steel pouring cart according to claim 1, characterized in that: The top surface of the shell is a top plate, and the top plate and the top of the furnace core reserve a space for furnace core jacking.

8. The abrasion resistant pipe outer layer molten steel pouring cart according to claim 1, characterized in that: The chute bag is provided with a circular arc transition horn gate at the front.

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