Thin-walled tube centrifugal pouring truck

Abstract

The utility model discloses a thin-walled tube centrifugal pouring truck which comprises a trolley, a chute ladle and a pouring furnace, wherein the chute ladle and the pouring furnace are arranged on the trolley. The chute bag is fixed in front of the trolley, two supports are fixed on two sides of the rear portion, and arc-shaped grooves matched with furnace mouth rotating shafts are formed in the tops of the supports. The pouring furnace is located behind the chute ladle, an induction coil of the pouring furnace is in pressure butt joint communication with cooling water and a cable, the two sides of the pouring furnace are provided with a tilting hearth and a stress shaft, the lower end of the tilting hearth is hinged to a trolley, a ring at the upper end is sleeved with the stress shaft, and the middle is supported by a supporting device. When molten steel is received, the pouring furnace is only supported by the weighing device and does not make contact with other components. The trolley can be placed on a bottom trolley or a ground rail and can be driven by a parallel cylinder or a motor device. According to the centrifugal casting device, the casting weight and the casting temperature are effectively controlled, and preconditions are provided for batch centrifugal production of thin-walled tubes.

Description

TECHNICAL FIELD

[0001] The utility model is applied to centrifugal casting field, relates to thin -walled pipe centrifugal casting's molten steel pouring, specifically a kind of centrifugal casting car. BACKGROUND

[0002] When thin-walled pipe is centrifugally cast, due to the small amount of molten steel, the molten steel fills the mold and cools down quickly, requiring high superheat for rapid pouring. The melting point of molten iron is relatively low, about 1200-1300℃, and the pouring temperature is about 1350-1450℃ when the pouring superheat is 150℃. However, the melting point of molten steel is relatively high, about 1500℃ or so, and the pouring temperature is 1600℃ when the pouring superheat is 100℃. This pouring temperature is already high temperature pouring for cast steel parts, which is difficult to control and requires multiple measures such as high molten steel tapping temperature, red-brown temperature above the baking of pouring ladle, rapid slagging operation on the ladle, and covering heat preservation cover. Moreover, the higher the pouring temperature, the greater the energy consumption required to reach high temperature. For thin-walled steel pipes, not only high temperature pouring is required for rapid forming, but also the pouring weight of each pipe needs to be consistent to ensure the uniformity of the size of the steel pipe. Therefore, under normal circumstances, a higher pouring temperature can be achieved by oversteaming and underpouring (the more molten steel, the smaller the temperature drop). However, the pouring weight cannot be measured during rapid pouring because the digital display of the electronic scale suspended by the crane hook lags behind, and the molten steel is poured quickly, usually within 3-4 seconds. During this time period, the electronic scale either does not display or displays a very low weight, so the pouring weight cannot be accurately controlled by the electronic scale during rapid pouring.

[0003] CN101879588A centrifuge split pouring car is used to solve the problem of molten iron falling into the groove affecting production efficiency, CN201895084U casting special pouring car replaces the crane with a trolley and replaces manual pouring with mechanical pouring, CN205110773U an electric pouring car for centrifugal casting is used to guide the metal liquid into the pipe mold by fixing the flow channel on the trolley. CN211135456U a pouring trolley for centrifugal casting machine is used for centrifugal pouring of ductile iron pipe, the trolley is installed with a fan-shaped ladle and a flow channel, the movement of the small diameter centrifuge is changed to the movement of the pouring trolley, and an inoculation device is added to perform inoculation treatment while pouring. CN212495284U a centrifuge for casting bimetallic pipe 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 measure the pouring molten steel weight. Therefore, the above pouring schemes do not solve the problem of quantitative pouring and cannot solve the problem of uniform thickness and size. Especially for thin-walled pipes, the pouring weight is small, ranging from thirty kilograms to more than one hundred kilograms, and the existing production equipment cannot meet the dual control of pouring temperature and pouring weight. SUMMARY

[0004] The technical problem solved by this utility model is to provide a centrifugal casting car for thin-walled tubes, with a casting furnace installed on the car to ensure the casting temperature. When the casting furnace receives molten steel, it ensures accurate weighing of the molten steel, realizes quantitative casting, and ensures the consistency of the thin-walled tube thickness.

[0005] The technical solution adopted in this utility model is as follows: The centrifugal casting trolley for thin-walled tubes includes a trolley, a chute set on the trolley, and a casting furnace. The chute is fixed in front of the top of the trolley, and two supports are fixed on both sides of the rear of the chute. The top of the supports is an arc-shaped groove, which cooperates with the nozzle shaft of the casting furnace. The casting furnace is located behind the chute. A tilting cylinder and a force-bearing shaft are set on both sides of the casting furnace. The bottom end of the tilting cylinder is hinged to the trolley, and the upper end of the cylinder is fitted with a ring to the force-bearing shaft, which is fixed to the casting furnace. The movement of the tilting cylinder can tilt the casting furnace for casting. A nozzle shaft is fixed at the nozzle position of the casting furnace to achieve fixed-point casting. The induction coil of the casting furnace is connected to cooling water and cables through a pressure connection method for easy opening and closing.

[0006] Furthermore, the tilting cylinder is supported by a support device, and the force-bearing shaft is fitted with a gap in the annular ring, that is, a clearance for the movement of the force-bearing shaft is maintained within the annular ring. When the casting furnace receives molten steel, it is only supported by a weighing device, and the force-bearing shaft does not contact the annular ring at the upper end of the tilting cylinder, nor does the furnace nozzle rotating shaft contact the arc-shaped groove. The support device includes a support block, a tension spring, and a support rod. The support block is fixed to the trolley, the lower end of the support rod is hinged to the trolley, and the upper end supports the tilting cylinder. The tension spring connects the middle of the support block and the support rod at both ends.

[0007] Furthermore, the weighing device is mounted on top of the lifting cylinder, which is mounted on a trolley at the bottom of the casting furnace, and the casting furnace is supported by the trolley. Alternatively, the weighing device is mounted on the trolley, and the casting furnace is supported by the weighing device.

[0008] Furthermore, the trolley is mounted on a base car, and a motor and hydraulic system are installed on the bottom surface of the top plate of the base car. Brakes are installed on the outer circumference of the base car's wheels. The base car can move between the melting furnace and the casting end of the mold, and the brakes can secure the base car.

[0009] Furthermore, a parallel cylinder is provided at the bottom or on both sides of the trolley, with one end of the parallel cylinder connected to the trolley and the other end fixed; when the trolley moves on the ground track, the other end of the parallel cylinder is fixed to the ground; when the trolley moves on the track or in the groove on the top surface of the undercarriage, the other end of the parallel cylinder is fixed to the undercarriage.

[0010] Furthermore, a motor and a hydraulic device are installed on the bottom surface of the top plate of the trolley, and a brake is installed on the outer circumference of the trolley's wheels.

[0011] Furthermore, the trolley is weighed as a whole by a weighing scale.

[0012] The pouring furnace can be inductively heated to ensure pouring temperature. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a front view of the structure of the embodiment 1;

[0014] Figure 2 is a top view of the structure of the embodiment 1; Figure 1

[0015] Figure 3 is a right view of the structure of the embodiment 1; Figure 1

[0016] Figure 4 is a front view of the structure of the embodiment 2;

[0017] Figure 5 is a front view of the structure of the embodiment 3;

[0018] Wherein: 1 - bottom car, 2 - chute bag, 3 - pouring furnace, 4 - trolley, 5 - motor device, 6 - hydraulic device, 7 - ground rail;

[0019] 11 - bottom car wheel, 12 - brake, 13 - car rail;

[0020] 21 - chute, 22 - chute bag body, 23 - support;

[0021] 31 - furnace nozzle, 32 - furnace nozzle pivot, 33 - stress shaft, 34 - tilting furnace cylinder, 35 - furnace bottom plate, 36 - weighter, 37 - support block, 38 - tension spring, 39 - support rod;

[0022] 41 - trolley wheel, 42 - parallel cylinder, 43 - lifting cylinder;

[0023] 301 - pouring furnace copper bar, 302 - pouring furnace water cooling pipe, 303 - water pipe, 304 - water pipe cylinder, 305 - copper bar cylinder, 306 - power transmission copper bar. DETAILED DESCRIPTION

[0024] In the utility model, the purchased parts and the structures not described in detail, such as motor device, hydraulic device, magnetic brake, weighter, etc. Figure 1 The following “front and back” refers to the direction of the center line of the car, and the direction of molten steel flow is front, that is, the right side of the drawing is front, and the left side is back.

[0025] ​​The main function of this invention is as follows: the casting furnace receives molten steel from the melting furnace, a weighing device measures the weight of the molten steel, and induction heating ensures the casting temperature, thereby achieving effective control of the two key process parameters: casting temperature and casting weight. The casting temperature ensures the formation of the thin-walled tube, and the casting weight ensures the uniformity of the thin-walled tube thickness. Example 1

[0026] The structure of the thin-walled tube centrifugal casting machine in this embodiment is shown in the attached figure. Figures 1-3 As shown, it is a double-car structure that can move forward and backward in the same direction, including a base car 1, a chute 2, a casting furnace 3, and a trolley 4.

[0027] The undercarriage 1 includes an undercarriage frame, undercarriage wheels 11, a motor unit 5, and a hydraulic system 6, etc., and is used to run on the ground rail 7 between the casting end of the pipe mold at the centrifuge casting station and the medium-frequency melting furnace. The undercarriage wheels 11, motor unit 5, and hydraulic system 6 are fixed to the undercarriage frame, which integrates the undercarriage into one unit. The motor unit 5 drives the axle to rotate through a motor, reducer, chain, sprocket, etc., enabling the undercarriage wheels 11 to move back and forth on the ground rail 7. The hydraulic system 6 supplies hydraulic oil to the tilting cylinder 34 and the parallel cylinder 42 through oil pipes, enabling the tilting cylinder 34 and the parallel cylinder 42 to extend and retract. The motor unit and hydraulic system are installed on the bottom surface of the undercarriage top plate and protected by the top plate to prevent damage from splashing molten steel or high temperatures caused by misoperation. To prevent the undercarriage from sliding when not in operation, especially during casting in the casting furnace, a brake 12 is installed on the outer circumference of the undercarriage wheels. The brake 12 adopts an electromagnet structure and is synchronized with the motor device. When the motor device is powered on, the brake magnetically attracts and releases the undercarriage wheels. When the motor device is powered off and stops, the compression spring causes the brake to hold the undercarriage wheels tightly, thereby fixing the undercarriage.

[0028] The trolley 4 is mounted on the roof of the base car 1 and includes a trolley frame, wheels 41, and a parallel cylinder 42. The wheels 41 and axles are mounted on the trolley frame to ensure its stable operation. The trolley and the base car are connected by the parallel cylinder 42, which is positioned between the bottom surface of the trolley and the top surface of the base car, with one end fixedly connected to the trolley and the other end fixedly connected to the base car. The extension and retraction of the parallel cylinder allows the trolley to move on the top surface of the base car. To ensure smooth and directional movement of the trolley, a rail 13 is fixed on the top surface of the base car, and the wheels move under the guidance and constraint of the rail 13. For interchangeability, the wheels, base wheels, and their axles should preferably be of the same size, and the track gauge of the rail and the ground rail should preferably be the same.

[0029] The chute bag 2 and the pouring furnace 3 are arranged on the trolley 4, the chute bag 2 is fixed at the front of the trolley, including a chute mouth 21, a chute bag body 22 and a support 23. The chute bag body 22 is used to guide the molten steel into the pipe mold, and a horn gate is preferably arranged in the chute bag body, the horn gate is circularly arc transition, without dead angle, to ensure smooth flow of the molten steel, and the horn gate is communicated with the chute mouth at the front end. Before pouring, the chute mouth is inserted into the inner hole of the pipe mold baffle and extends into the pipe mold. Two supports 23 are fixed at the rear of the chute bag body 22, the top of the support 23 is an arc-shaped groove, and the arc-shaped groove is matched with a furnace nozzle rotating shaft 32 of the pouring furnace, and the furnace nozzle rotating shaft is supported and rotated by the arc-shaped groove.

[0030] The pouring furnace 3 is arranged behind the chute bag 2, is a medium-frequency induction heating furnace purchased from outside, is used to receive the molten steel, and an induction coil thereof is electrically connected with an electric control in a control cabinet through a copper bar pressure butt joint, cooling water is connected with a water pipe through a sealed butt joint, and the pouring furnace can inductively heat the molten steel in the pouring furnace. The pouring furnace includes a furnace body and a furnace shell, the furnace body is supported and protected by the furnace shell, the bottom of the furnace shell is a furnace bottom plate 35, the furnace bottom plate 35 is supported by a load cell 36 purchased from outside, and the load cell 36 is fixed on the top surface of the bottom trolley. On both sides of the furnace shell, a force receiving shaft 33 and a tilting cylinder 34 matched with each other are arranged, the force receiving shaft 33 is fixed on the furnace shell, the bottom end of the tilting cylinder 34 is hinged to the trolley, and the upper end of the tilting cylinder 34 is gap-fitted with the force receiving shaft, that is, there is a movement gap between the force receiving shaft and the circular ring. When the pouring furnace receives the molten steel, the circular ring is separated from the force receiving shaft and does not contact the force receiving shaft. When pouring, the two contact each other, and the force receiving shaft is pushed by the circular ring to make the pouring furnace tilt. The furnace nozzle rotating shaft 32 is fixed at the position of the furnace nozzle 31 of the pouring furnace, and the furnace nozzle rotating shaft is matched with the arc-shaped groove at the top of the support. When pouring, the pouring furnace is lifted and tilted around the furnace nozzle rotating shaft, and the furnace nozzle is almost stationary, so that the molten steel pouring can be realized by fixed-point pouring, and conditions are provided for rapid pouring of the thin-walled pipe.

[0031] When the pouring furnace receives the molten steel from the melting furnace, the rest of the furnace shell does not contact any part, which is the key to accurately weighing the weight of the molten steel. The furnace nozzle rotating shaft is fixed with the arc-shaped groove, and the size can be relied on to keep from contacting. However, the tilting cylinder needs a supporting device to ensure that the circular ring at the end thereof does not contact the force receiving shaft when the molten steel is discharged. A simple structure is given in the embodiment, as shown in the accompanying drawings. Figure 1The support block 37 is fixed on the trolley, the lower end of the support rod 39 is hinged to the trolley, and one end of the tension spring 38 is connected to the support block and the other end is connected to the middle of the support rod. In the un-pouring state, the tension spring pulls the support rod to rotate towards the support block and is positioned against the support block, at this time, the upper end of the support rod supports and fixes the tilting cylinder, so that the ring at the upper end of the tilting cylinder does not contact the force bearing shaft. When the pouring furnace is poured, the cylinder rod of the tilting cylinder is extended, the ring contacts the force bearing shaft, so that the furnace body is tilted, and the furnace nozzle rotating shaft falls into the arc-shaped groove. When the cylinder rod continues to extend, the pouring furnace rotates around the furnace nozzle rotating shaft supported by the arc-shaped groove, at the same time, the cylinder body of the tilting cylinder moves forward and compresses the tension spring to lengthen the support rod. After the pouring is completed, the cylinder rod of the tilting cylinder is retracted, the pouring furnace is returned to the original position, the furnace nozzle rotating shaft is separated from the arc-shaped groove, the tension spring pulls the support rod to return to the original position, and the ring at the upper end of the tilting cylinder is separated from the force bearing shaft.

[0032] When the pouring end of the pipe mold is far away from the melting furnace, the bottom trolley can run at a long distance, and the parallel cylinders on the trolley can adjust the position at a small distance, such as the steel receiving position and the pouring position. When the pouring furnace receives the molten steel, the connection between the cooling water and the copper bar of the pouring furnace is disconnected, the bottom trolley and the trolley run the pouring furnace under the nozzle of the melting furnace to avoid the influence of the connection on the weight of the molten steel. At this time, the pouring furnace is only supported by the weight indicator, and the rest of the pouring furnace is not in contact with any part. After the molten steel is discharged from the melting furnace, the weight indicator accurately measures the weight of the molten steel. The bottom trolley and the trolley run the pouring furnace to the operating position, the pressure connection connects the cooling water and the copper bar of the pouring furnace, the power is turned on to heat up, the deoxidation operation is carried out, and the pouring is prepared. When the temperature rises to the pouring temperature, the parallel cylinders move the trolley, so that the chute bag chute enters the pipe mold at the pouring end, the tilting cylinder is extended to make the pouring furnace pour, and all the molten steel enters the pipe mold from the chute bag, and the pipe mold rotates to form a thin-walled pipe by centrifugal force. After the pouring is completed, the tilting cylinder returns the pouring furnace to the original position, and the next water receiving and pouring operation is carried out. Example 2

[0033] The same as example 1 is that the detachable parallel cylinder is connected with the trolley, the whole trolley is replaced, the pouring furnace and the chute bag are replaced, so as to adapt to the change of the pouring weight of the thin-walled pipe with different diameters and different thicknesses.

[0034] The difference from example 1 is that: 1) there is no bottom trolley, one end of the parallel cylinder 42 is fixedly connected with the trolley, and the other end is fixedly connected with the ground in the middle of the track, the movement and fixation of the trolley all rely on the parallel cylinder, and it is suitable for the case that the melting furnace is close to the pouring end of the pipe mold. Moreover, it is beneficial to reduce the height of the pouring trolley from the ground, and further reduce the height of the melting furnace. 2) In view of the fact that the pouring furnace is always supported and stabilized by the weight indicator in example 1, it will have an adverse effect on the service life of the weight indicator, and because there is a gap between the tilting cylinder and the force bearing shaft, the furnace nozzle rotating shaft and the arc-shaped groove are not in contact, and the impact of the pouring furnace tilting and returning to the original position is large. Therefore, the structure of the weight indicator is adjusted, as shown in the attached drawings. Figure 4The lifting cylinder 43 is installed on the trolley at the bottom of the pouring furnace, and the top of the lifting cylinder 43 is installed with the weighter 36. In the non-weighing state, the cylinder rod of the lifting cylinder falls, the weighter is not in contact with the bottom of the pouring furnace, and the weight of the pouring furnace is supported by the trolley. There is a gap between the inner hole of the upper end ring of the tilting cylinder and the force receiving shaft. When the molten steel is poured into the pouring furnace, the cylinder rod of the lifting cylinder rises, the weighter contacts the bottom of the pouring furnace, supports the upward movement of the pouring furnace, makes the nozzle rotating shaft separate from the arc-shaped groove, the force receiving shaft separates from the tilting cylinder, and the pouring furnace is completely supported by the weighter, so that the precise weighing of the molten steel is realized. After the weighing of the molten steel is completed, the cylinder rod of the lifting cylinder retracts, and the pouring furnace is supported by the trolley, which can effectively protect the weighter.

[0035] In the embodiment, due to the stroke limitation of the parallel cylinder rod, for the case that the melting furnace is far away from the pipe mold pouring end, a ladle can be used to receive the molten steel, and the ladle pours the molten steel into the pouring furnace, so that the weighing of the molten steel can be realized. The subsequent heating and pouring operations are the same as those in embodiment 1. Embodiment 3

[0036] The structure of the embodiment is shown in the accompanying drawings. Figure 5 Three points are mainly explained: 1) The motor device 5, the hydraulic device 6 and the brake 12 on the trolley in embodiment 1 are installed on the trolley, so that the long-distance operation of the trolley can be realized, and the fixation of the trolley relies on the brake 12. 2) The weighing of the molten steel adopts the ground scale to weigh the whole weight of the trolley. 3) The cooling water and the cable of the pouring furnace can be quickly replaced through the pressure butt joint, and the embodiment only gives a structure form. The copper bar 301 and the water cooling pipe 302 of the pouring furnace are fixed on the trolley, and the water pipe cylinder 304 and the copper bar cylinder 305 are fixed on the ground. The upper end of the water pipe cylinder 304 is fixed with a bend, and the bend is connected with the flexible water pipe 303. When the trolley runs to the specified position, the brake fixes the trolley, the copper bar cylinder moves upward, the power supply copper bar 306 tightly contacts the copper bar 301 of the pouring furnace, and the power supply for the pouring furnace can be realized. The water pipe cylinder moves upward, the bend is in sealing communication with the water cooling pipe 302 of the pouring furnace, and the smooth flow of the cooling water can be realized. When the trolley receives the molten steel or pours, the water pipe cylinder and the copper bar cylinder move downward, and the butt joint is loosened, so that the trolley can be moved to the working position.

[0037] In the embodiment, since the whole trolley is weighed, the disengagement of the ring from the force receiving shaft and the disengagement of the arc-shaped groove from the nozzle rotating shaft are not required during weighing. The ring can be sleeved on the force receiving shaft, and no gap is required.

[0038] Supplementary explanation: 1) The supporting device structure of the ladle is various, and only a relatively convenient one is given in embodiment 1, and it does not represent all. 2) In embodiment 3, only a structure form of quick replacement of the cooling water and cable of the pouring furnace is given, and it does not represent all. 3) The car rail or ground rail of the trolley can also be replaced by a groove, as long as the movement of the guided trolley can be constrained. 4) The parallel cylinder can be arranged at the bottom of the trolley or arranged at both sides of the trolley, and the arrangement of the parallel cylinder at the bottom of the trolley can be protected, which is the best embodiment. 5) The arc-shaped groove matched with the rotating shaft of the furnace nozzle can be changed into a hole, which does not affect the molten steel weighing and the tilting pouring operation, and only the arc-shaped groove is convenient for installation and cooperation with the rotating shaft of the furnace nozzle, so the hole is also included in the meaning of the arc-shaped groove of the utility model. 6) In embodiment 1 and embodiment 2, the weighing device weighs the weight of the molten steel and the pouring furnace, the proportion of the molten steel in the total weight is large, and the molten steel weighing is accurate. In embodiment 3, the ground scale weighs the molten steel and the whole vehicle, the proportion of the molten steel weight in the total weight is small, and the molten steel weighing accuracy is affected, so from the aspects of the molten steel weighing and the service life of the weighing device, embodiment 2 is the best embodiment. 7) In the three embodiments, the emphases of the local structures are different, such as the supporting device in embodiment 1, the weighing device in embodiment 2 and the docking mechanism in embodiment 3, only for the sake of simple and clear drawings, the emphases are explained, and the mutual use of these local structures is not affected.

[0039] The utility model sets up the pouring furnace on the trolley, when the pouring furnace receives the molten steel in embodiment 1 and embodiment 2, does not contact any external connecting piece, the melting furnace slowly discharges the steel, guarantees the molten steel weight weighing accuracy. The whole vehicle is weighed in embodiment 3, as long as the induction coil docking structure of the pouring furnace is loosened. After the pouring furnace receives the molten steel, can send the power and heat, guarantee the pouring temperature. The thin-walled pipe usually pours the molten steel in small amount, and the pouring weight and the pouring temperature cannot be guaranteed at the same time, the utility model solves the problem, realizes the double control of the pouring temperature and the pouring weight, guarantees the consistency of the thin-walled pipe size. In addition, the pouring temperature is the discharge temperature of the pouring furnace, without the heat dissipation of the pouring ladle, greatly reduces the overheating degree of the molten steel when discharging, prolongs the service life of the pouring furnace lining. The pouring furnace quickly pours all the molten steel into the chute ladle, meets the requirement of quantitative pouring, guarantees the consistency of the thin-walled pipe size, provides the prerequisite for batch centrifugal production of the thin-walled pipe.

[0040] The utility model is not only suitable for centrifugal pouring of single metal cast steel pipe, but also is more suitable for centrifugal pouring of double metal cast steel pipe. For the double metal thin-walled pipe, only the pouring weight of the outer layer molten steel is accurately controlled, the wall thickness size of the outer layer can be effectively controlled, the consistency of the diameter of the interface between the inner layer and the outer layer can be realized, then the pouring weight and the wall thickness size of the inner layer are controlled, and the consistency of the double metal thin-walled pipe size is guaranteed.

Claims

1. A thin walled tube centrifugal casting car comprising a trolley characterised in that: The trolley is provided with a chute bag and a pouring furnace; The chute bag is fixed at the front top surface of the trolley, two supports (23) are fixed at the rear of the chute bag, the top of the support (23) is an arc-shaped groove which cooperates with the nozzle rotating shaft (32) of the pouring furnace; The pouring furnace is located behind the chute bag, a tilting cylinder (34) and a force receiving shaft (33) are arranged at the two sides of the pouring furnace, the bottom end of the tilting cylinder (34) is hinged on the trolley, the upper end of the tilting cylinder (34) is sleeved with the force receiving shaft (33), the force receiving shaft (33) is fixed on the pouring furnace, and the nozzle rotating shaft (32) is fixed at the nozzle position of the pouring furnace; The induction coil of the pouring furnace is connected with cooling water and cables through pressure butt joint.

2. A thin walled tube centrifugal casting carriage according to claim 1, characterized in that: The tilting cylinder (34) is supported by a supporting device, and the force receiving shaft (33) is sleeved with the annular gap.

3. A thin walled tube centrifugal casting car as defined in claim 2 wherein: When the pouring furnace receives molten steel, only the load cell is supported, the force receiving shaft (33) is not in contact with the annular ring at the upper end of the tilting cylinder (34), and the nozzle rotating shaft (32) is not in contact with the arc-shaped groove.

4. A thin walled tube centrifugal casting carriage according to claim 3, wherein: The load cell is installed at the top of the lifting cylinder (43), the lifting cylinder (43) is installed on the trolley and located at the bottom of the pouring furnace, and the pouring furnace is supported by the trolley.

5. A thin walled tube centrifugal casting car as defined in claim 3 wherein: The load cell supports the pouring furnace.

6. A thin walled tube centrifugal casting car as defined in claim 2 wherein: The supporting device comprises a supporting block (37), a tension spring (38) and a supporting rod (39), the supporting block (37) is fixed on the trolley, the lower end of the supporting rod (39) is hinged to the trolley, the upper end of the supporting rod (39) supports the tilting cylinder (34), and the two ends of the tension spring (38) are connected to the middle part of the supporting block (37) and the supporting rod (39).

7. A thin walled tube centrifugal casting car as defined in claim 1 wherein: The trolley is installed on the base trolley, the motor device and the hydraulic device are installed on the bottom surface of the top plate of the base trolley, and the brake is arranged on the outer circumferential surface of the base trolley wheel (11).

8. A thin-walled tube centrifugal casting carriage according to claim 1 or 7, characterized in that: Parallel cylinders (42) are arranged at the bottom or two sides of the trolley, one end of the parallel cylinder (42) is connected to the trolley, and the other end is fixed; when the trolley moves on the ground rail, the other end of the parallel cylinder (42) is fixed on the ground; when the trolley moves on the trolley rail or in the groove on the top surface of the base trolley, the other end of the parallel cylinder (42) is fixed on the base trolley.

9. A thin walled tube centrifugal casting car as defined in claim 1 wherein: The motor device and the hydraulic device are installed on the bottom surface of the top plate of the trolley, and the brake is arranged on the outer circumferential surface of the trolley wheel (41).

10. A thin walled tube centrifugal casting car as defined in claim 1 wherein: The trolley is weighed by the ground scale.

Images