A centrifugal casting device for drainage pipe production

Abstract

The present invention relates to the technical field of drain pipe production, and in particular to a centrifugal casting device for drain pipe production, comprising a centrifugal body, a sealing mechanism and a material taking mechanism. One end of the centrifugal body is a feed end, and the other end is a discharge end, and the discharge end is open. The sealing mechanism is arranged on one side of the discharge end, and is used to seal the open part of the centrifugal body to form a closed space for processing the drain pipe. The material taking mechanism is connected to the outside of the sealing mechanism, and is used to take out the cast drain pipe. The present invention can drive the centrifugal drum to rotate through an electric roller, so that the molten metal in the centrifugal drum performs centrifugal motion to cast the drain pipe, and the output shaft of the servo motor can drive the contact block to move in a direction away from each other, so that the contact block contacts the inner wall of the cast drain pipe, and the electric guide rail can drive the cast drain pipe to move to the right, so that the cast drain pipe is removed from the centrifugal drum, and the cast drain pipe is conveniently taken out.

Description

Technical Field

[0001] The invention relates to the technical field of drainage pipe production, and in particular to a centrifugal casting device used for drainage pipe production. Background Art

[0002] In the drainage pipe production industry, the use of centrifugal casting to manufacture drainage pipes can significantly improve product quality, ensure product consistency, reduce the defective rate in the production process, and provide drainage pipes with more reliable and durable quality.

[0003] In the actual production process, the molten metal is generally poured into a centrifuge cylinder, which is then driven to rotate by an electric roller to make the molten metal in the centrifuge cylinder perform centrifugal motion to cast the drain pipe. After the casting is completed, the cast drain pipe is manually taken out. During the cooling process of the molten metal, significant volume shrinkage will occur, resulting in a strong mechanical bite force between the cast drain pipe and the inner wall of the centrifuge cylinder, causing the cast drain pipe to fit tightly to the inner wall of the centrifuge cylinder, making it difficult for the staff to take out the cast drain pipe. Secondly, due to the inconsistent cooling speeds of different parts, residual stress will also be generated inside the cast drain pipe, further increasing the difficulty of removal. Summary of the invention

[0004] In view of this, the present invention provides a centrifugal casting device for the production of drain pipes, which can overcome the disadvantage that significant volume shrinkage occurs during the cooling process of the molten metal, resulting in a strong mechanical bite force between the cast drain pipe and the inner wall of the centrifugal cylinder, thereby causing the cast drain pipe to fit tightly to the inner wall of the centrifugal cylinder, making it difficult for staff to take out the cast drain pipe.

[0005] The technical implementation scheme of the present invention is: a centrifugal casting device for the production of drainage pipes, comprising a centrifugal body, a blocking mechanism and a material taking mechanism;

[0006] One end of the centrifugal body is a feed end, and the other end is a discharge end, and the discharge end is open;

[0007] The blocking mechanism is arranged at one side of the discharge end and is used to block the open part of the centrifugal body to form a closed space for processing the drainage pipe;

[0008] The material taking mechanism is connected to the outside of the blocking mechanism and is used to take out the cast drain pipe;

[0009] The centrifugal body comprises a centrifugal cylinder, and the right side of the centrifugal cylinder is open;

[0010] The blocking mechanism includes an electric guide rail, a movable plate, a connecting frame, a mounting ring, a blocking ring and a convex strip;

[0011] An electric guide rail is installed on the base frame, a moving plate is connected to the slider of the electric guide rail, a connecting frame is connected to the moving plate, a mounting ring is connected to the connecting frame, a sealing ring for sealing the open portion on the right side of the centrifuge cylinder is rotatably connected to the outside of the mounting ring, the sealing ring contacts the inner wall of the centrifuge cylinder, a convex strip is connected to the sealing ring, a groove matching the convex strip is opened in the centrifuge cylinder, and the convex strip and the groove are slidably matched.

[0012] As a further preferred embodiment, the centrifugal body also includes a base frame, a mounting frame, a feed hopper and an electric roller. Four electric rollers are installed on the top of the base frame, and a centrifugal cylinder is placed on the four electric rollers. The base frame is connected to a mounting frame, and the mounting frame is connected to a feed hopper. The right end of the feed hopper is rotatably connected to the left side of the centrifugal cylinder, and the feed hopper extends into the centrifugal cylinder. The feed hopper and the centrifugal cylinder are connected, and the molten metal flows into the centrifugal cylinder through the feed hopper. The electric roller drives the centrifugal cylinder to rotate, so that the molten metal in the centrifugal cylinder performs centrifugal motion to cast the drain pipe. The sealing mechanism is used to seal the open end on the right side of the centrifugal cylinder, and the material taking mechanism is used to take out the cast drain pipe.

[0013] As a further preferred scheme, the material taking mechanism includes an electric push rod, a mounting disk, a rotating disk, a servo motor, a sliding rod and a contact block. The electric push rod is installed on the connecting frame, and the mounting disk is connected to the telescopic rod of the electric push rod. The mounting disk is located in the mounting ring, and the mounting disk is in contact with the inner wall of the mounting ring. The mounting disk is rotatably connected to the rotating disk, and the servo motor is installed on the mounting disk. The output shaft of the servo motor is connected to the middle part of the rotating disk. The rotating disk is provided with an arc groove, and the mounting disk is slidably connected with a sliding rod. The end of the sliding rod close to the rotating disk is located in the arc groove, and the sliding rod is connected to the contact block. The rotating disk rotates through the arc groove to drive the sliding rod to move, and the sliding rod drives the contact block to move, so that the contact block contacts the inner wall of the cast drainage pipe.

[0014] As a further preferred embodiment, a heat preservation mechanism is also included, which includes a heat preservation ring, an air inlet pipe, an annular frame, a connecting plate and an air outlet pipe. The heat preservation ring is connected to the outside of the centrifugal cylinder, the heat preservation ring is in contact with the electric roller, the centrifugal cylinder and the heat preservation ring are connected through the air inlet pipe, an air outlet hole is opened on the heat preservation ring, the outside of the heat preservation ring is rotatably connected to the annular frame, the air outlet hole is located in the annular frame, a connecting plate is connected to the base frame, the connecting plate is connected to the annular frame, and the annular frame is connected to the air outlet pipe.

[0015] As a further preferred scheme, it also includes a positioning mechanism, which includes a connecting block, a sliding rod, a friction block, a contact rod, a spring and a wedge block. The movable plate is connected to the connecting block, the connecting block is slidably connected to the sliding rod, the sliding rod is connected to the friction block, the friction block moves downward and contacts with the blocking ring, the friction block can increase the resistance to rotation of the blocking ring, the friction block is connected to the contact rod, the contact rod slides through the connecting block, a spring is connected between the contact rod and the connecting block, and the base frame is connected to the wedge block, and the lower end of the contact rod contacts with the inclined surface of the wedge block.

[0016] As a further preferred solution, a friction ring is also included, and the sealing ring is connected with the friction ring.

[0017] As a further preferred solution, a contact wheel is also included. The lower end of the contact rod is rotatably connected to the contact wheel, and the contact wheel contacts the inclined surface of the wedge block.

[0018] As a further preferred solution, a protective cover is also included. The mounting plate is connected with a protective cover for protecting the rotating plate and the sliding rod. The rotating plate and the sliding rod are both located in the protective cover, and the contact block slides through the protective cover.

[0019] The present invention has the following advantages: 1. The present invention can drive the centrifugal drum to rotate through the electric roller, so that the metal liquid in the centrifugal drum performs centrifugal motion to cast the drain pipe. The output shaft of the servo motor can drive the contact blocks to move away from each other, so that the contact blocks contact the inner wall of the cast drain pipe. The electric guide rail can drive the cast drain pipe to move to the right, and the cast drain pipe can be removed from the centrifugal drum, so that the cast drain pipe can be taken out conveniently.

[0020] 2. The hot air in the centrifuge cylinder will enter the insulation ring. The heat of the hot air can keep the centrifuge cylinder warm, slow down the cooling rate of the molten metal in the centrifuge cylinder, prolong the time that the molten metal remains in liquid state, ensure that the molten metal can fully fill every corner of the centrifuge cylinder, and reduce defects such as shrinkage cavities and shrinkage.

[0021] 3. The friction block can increase the resistance to the rotation of the plugging ring, thereby preventing the plugging ring from rotating and causing the convex strips and the grooves to not correspond, thereby preventing the convex strips and the centrifugal cylinder from colliding when the plugging ring enters the centrifugal cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0023] Figure 2 Shows Figure 1 A schematic diagram of the structure from another angle.

[0024] Figure 3 Shows Figure 2Schematic diagram of the partial three-dimensional structure of the middle blocking mechanism.

[0025] Figure 4 A schematic diagram of the three-dimensional structure of the groove of the present invention is shown.

[0026] Figure 5 A first three-dimensional structural schematic diagram of the material taking mechanism of the present invention is shown.

[0027] Figure 6 A second three-dimensional structural schematic diagram of the material taking mechanism of the present invention is shown.

[0028] Figure 7 A three-dimensional structural schematic diagram of the heat preservation mechanism of the present invention is shown.

[0029] Figure 8 A three-dimensional structural schematic diagram of the heat preservation ring and the air outlet of the present invention is shown.

[0030] Fig. 9 A first three-dimensional structural schematic diagram of the positioning mechanism of the present invention is shown.

[0031] Fig.10 A second three-dimensional structural schematic diagram of the positioning mechanism of the present invention is shown.

[0032] Fig.11 A three-dimensional structural schematic diagram of the protective cover of the present invention is shown.

[0033] Wherein: 1-base frame, 2-electric roller, 3-centrifugal cylinder, 4-mounting frame, 5-feed hopper, 6-electric guide rail, 7-moving plate, 8-connecting frame, 9-mounting ring, 10-sealing ring, 11-convex strip, 12-groove, 13-electric push rod, 14-mounting plate, 15-rotating plate, 16-servo motor, 17-arc groove, 18-sliding rod, 19-contact block, 20-insulation ring, 21-inlet pipe, 22-air outlet, 23-ring frame, 231-connecting plate, 24-air outlet pipe, 25-connecting block, 26-sliding rod, 27-friction block, 28-contact rod, 29-spring, 30-wedge block, 31-inclined surface, 32-friction ring, 33-contact wheel, 34-protective cover. DETAILED DESCRIPTION

[0034] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the position of the structure shown in the corresponding drawings. The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning. The words such as connection and coupling in this application include direct and indirect connection (coupling) unless otherwise specified.

[0035] Reference Figure 1-Figure 6, a centrifugal casting device for drainage pipe production, comprising a centrifugal body, a blocking mechanism and a material taking mechanism;

[0036] One end of the centrifugal body is a feed end, and the other end is a discharge end, and the discharge end is open;

[0037] The blocking mechanism is arranged at one side of the discharge end and is used to block the open part of the centrifugal body to form a closed space for processing the drainage pipe;

[0038] The material taking mechanism is connected to the outside of the blocking mechanism and is used to take out the cast drainage pipe.

[0039] Specifically, the centrifuge body includes a base frame 1, an electric roller 2, a centrifugal cylinder 3, a mounting frame 4, a feed hopper 5, a blocking mechanism and a material taking mechanism. The electric rollers 2 are symmetrically installed on the left and right sides of the top of the base frame 1. The centrifugal cylinder 3 is placed on the four electric rollers 2. The right side of the centrifugal cylinder 3 is open. The mounting frame 4 is connected to the left side of the base frame 1 by bolts. The upper part of the mounting frame 4 is connected to the feed hopper 5. The right end of the feed hopper 5 is rotatably connected to the middle part of the left side of the centrifugal cylinder 3, and the feed hopper 5 extends into the centrifugal cylinder 3. The feed hopper 5 and the centrifugal cylinder 3 are connected. The blocking mechanism is used to seal the open part on the right side of the centrifugal cylinder 3, and the material taking mechanism is used to take out the cast drainage pipe.

[0040] Reference Figure 2-Figure 4 The blocking mechanism includes an electric guide rail 6, a movable plate 7, a connecting frame 8, a mounting ring 9, a blocking ring 10 and a convex strip 11. The front and rear sides of the right side of the base frame 1 are both installed with electric guide rails 6 by bolts. The tops of the sliders of the two electric guide rails 6 are commonly connected to the movable plate 7. The movable plate 7 is driven to move by the two electric guide rails 6, which can improve the stability of the movable plate 7. The upper left part of the movable plate 7 is connected to the connecting frame 8 by bolts, and the left side of the connecting frame 8 is connected to the mounting ring 9. The outer side of the mounting ring 9 is rotatably connected to the blocking ring 10, and the blocking ring 10 contacts the inner wall of the centrifugal cylinder 3. The outer side of the blocking ring 10 is connected with convex strips 11 at uniform intervals in the circumferential direction, and the inner side of the centrifugal cylinder 3 is uniformly spaced with grooves 12 adapted to the convex strips 11. The convex strips 11 and the grooves 12 are slidably matched.

[0041] Reference Figure 5 and Figure 6The material taking mechanism includes an electric push rod 13, a mounting plate 14, a rotating plate 15, a servo motor 16, a slide bar 18 and a contact block 19. The front and rear parts of the connecting frame 8 are both equipped with electric push rods 13 by bolts. The left ends of the telescopic rods of the two electric push rods 13 are commonly connected with the mounting plate 14. The mounting plate 14 is located in the mounting ring 9, and the mounting plate 14 is in contact with the inner wall of the mounting ring 9. The left side of the mounting plate 14 is rotatably connected with the rotating plate 15. The middle part of the right side of the mounting plate 14 is equipped with a servo motor 16 by bolts. The servo motor 16 is installed in the middle part of the right side of the mounting plate 14. The output shaft of the servo motor 16 is connected to the middle part of the rotating disk 15. Six arc grooves 17 are evenly spaced around the left side of the rotating disk 15. Six sliding rods 18 are evenly spaced and slidably connected to the left side of the mounting disk 14. The ends of the six sliding rods 18 close to the rotating disk 15 are respectively located in the six arc grooves 17. The ends of the six sliding rods 18 away from each other are connected to contact blocks 19. The sides of the six contact blocks 19 away from each other are all provided with anti-slip grooves to ensure that the contact blocks 19 can fit tightly with the inner wall of the cast drainage pipe.

[0042] The staff pours the molten metal into the centrifugal cylinder 3 through the feed hopper 5, and the sealing ring 10 seals the open part on the right side of the centrifugal cylinder 3 to prevent the molten metal in the centrifugal cylinder 3 from leaking, and then starts the electric roller 2, which drives the centrifugal cylinder 3 to rotate, so that the molten metal in the centrifugal cylinder 3 performs centrifugal motion to cast the drain pipe. The centrifugal cylinder 3 drives the sealing ring 10 to rotate through the convex strip 11 to avoid friction between the sealing ring 10 and the centrifugal cylinder 3. After the casting of the drain pipe is completed, the electric roller 2 is turned off, and then the telescopic rod of the electric push rod 13 is controlled to extend, driving the mounting plate 14 to move to the left, moving the mounting plate 14 out of the mounting ring 9, and moving the mounting plate 14 into the centrifugal cylinder 3, and then controlling the output shaft of the servo motor 16 to rotate, driving the rotating plate 15 to rotate, and the rotating plate 15 drives the six sliding rods 18 to move away from each other through the arc groove 17. The sliding bar 18 drives the contact block 19 to move away from each other (in the radial direction of the drain pipe after casting), so that the contact block 19 contacts the inner wall of the drain pipe after casting, and then controls the electric guide rail 6 to drive the moving plate 7 to move right, the moving plate 7 drives the connecting frame 8 and the electric push rod 13 to move right, the connecting frame 8 drives the mounting ring 9 to move right, the mounting ring 9 drives the sealing ring 10 and the convex strip 11 to move right, the sealing ring 10 is moved out of the centrifugal cylinder 3, the convex strip 11 is moved out of the groove 12, the electric push rod 13 drives the mounting plate 14 to move right, the mounting plate 14 drives the contact block 19 to move right, the contact block 19 drives the drain pipe after casting to move right, and the drain pipe after casting is moved out of the centrifugal cylinder 3, so as to facilitate the removal of the drain pipe after casting.

[0043] Reference Figure 7 and Figure 8, also includes a heat preservation mechanism, the heat preservation mechanism includes a heat preservation ring 20, an air inlet pipe 21, an annular frame 23, a connecting plate 231 and an air outlet pipe 24, the outside of the centrifugal cylinder 3 is connected with a heat preservation ring 20, the heat preservation ring 20 is in contact with the electric roller 2, the left side of the centrifugal cylinder 3 is connected with an air inlet pipe 21 at evenly spaced intervals in the circumferential direction, the air inlet pipe 21 and the heat preservation ring 20 are connected and communicated, the connection position of the air inlet pipe 21 is located in the middle of the left side of the centrifugal cylinder 3, which can prevent the molten metal in the centrifugal cylinder 3 from flowing into the air inlet pipe 21, the outside of the heat preservation ring 20 is evenly spaced with air outlet holes 22 in the circumferential direction, the outside of the heat preservation ring 20 is rotatably connected with an annular frame 23, the air outlet hole 22 is located in the annular frame 23, the top right side of the base frame 1 is connected with a connecting plate 231 by bolts, the top of the connecting plate 231 is connected to the bottom of the annular frame 23, and the bottom of the annular frame 23 is connected with an air outlet pipe 24.

[0044] During the process of casting the drainage pipe, the hot air in the centrifugal cylinder 3 will enter the insulation ring 20 through the air inlet pipe 21, and then the hot air in the insulation ring 20 will flow into the annular frame 23 through the air outlet 22, and finally the hot air will be discharged through the air outlet pipe 24. After the casting of the drainage pipe is completed, there is still hot air in the insulation ring 20. The heat of the hot air can keep the centrifugal cylinder 3 warm, slow down the cooling rate of the molten metal in the centrifugal cylinder 3, prolong the time that the molten metal remains in liquid state, ensure that the molten metal can fully fill every corner of the centrifugal cylinder 3, and reduce defects such as shrinkage cavities and shrinkage.

[0045] Reference Fig. 9 and Fig.10 , also includes a positioning mechanism, the positioning mechanism includes a connecting block 25, a sliding rod 26, a friction block 27, a contact rod 28, a spring 29 and a wedge block 30, the lower left part of the movable plate 7 is connected to the connecting block 25, the front and rear sides of the left part of the connecting block 25 are slidably connected to the sliding rods 26, the upper ends of the two sliding rods 26 are commonly connected to the friction block 27, the middle of the bottom of the friction block 27 is connected to the contact rod 28, the contact rod 28 slides through the connecting block 25, the contact rod 28 is sleeved with a spring 29, the two ends of the spring 29 are respectively connected to the contact rod 28 and the connecting block 25, the middle part of the right side of the chassis 1 is connected to the wedge block 30, and the lower end of the contact rod 28 contacts the inclined surface 31 of the wedge block 30.

[0046] Reference Fig.10 , also includes a friction ring 32, and the friction ring 32 is connected to the right side of the sealing ring 10.

[0047] Reference Fig.10 , and also includes a contact wheel 33. The lower end of the contact rod 28 is rotatably connected to the contact wheel 33. The contact wheel 33 contacts the inclined surface 31 of the wedge block 30. The contact wheel 33 rolls upward along the inclined surface 31 of the wedge block 30, which can avoid friction between the contact rod 28 and the wedge block 30, thereby avoiding wear of the contact rod 28 and the wedge block 30.

[0048] Initially, the contact wheel 33 is in contact with the inclined surface 31 of the wedge block 30, the wedge block 30 is against the contact rod 28, the friction block 27 is not in contact with the blocking ring 10, and the spring 29 is in a compressed state; after the drainage pipe is cast, the electric guide rail 6 drives the movable plate 7 to move right, the movable plate 7 drives the connecting block 25 to move right, the connecting block 25 drives the contact rod 28 and the contact wheel 33 to move right, the contact wheel 33 and the inclined surface 31 of the wedge block 30 are out of contact, and under the action of the spring 29, the contact rod 28 and the friction block 27 move downward, the friction block 27 will contact the blocking ring 10, and the friction block 27 can increase the resistance to the rotation of the blocking ring 10 to avoid the blocking ring 10 rotating and causing The convex strip 11 and the concave groove 12 do not correspond to each other, thereby preventing the convex strip 11 and the centrifugal cylinder 3 from colliding when the sealing ring 10 enters the centrifugal cylinder 3. The friction ring 32 and the friction block 27 are in direct contact, which can further increase the resistance to the rotation of the sealing ring 10. When the movable plate 7 moves to the left, it will drive the contact rod 28 and the contact wheel 33 to move to the left. The contact wheel 33 moves to the left and contacts the inclined surface 31 of the wedge block 30. The contact wheel 33 rolls upward along the inclined surface 31 of the wedge block 30, thereby enabling the contact rod 28 and the friction block 27 to move upward. The spring 29 is compressed, and the friction block 27 moves upward to disengage from the friction ring 32, thereby ensuring that the sealing ring 10 can rotate smoothly.

[0049] Reference Fig.11 , and also includes a protective cover 34. The protective cover 34 is connected to the left side of the mounting plate 14. The rotating plate 15 and the sliding rod 18 are both located in the protective cover 34. The contact block 19 slides through the protective cover 34. The protective cover 34 can protect the rotating plate 15 and the sliding rod 18 to prevent the metal liquid from splashing onto the rotating plate 15 and the sliding rod 18.

[0050] The above description is only an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention should be included in the protection scope of the present invention. The contents not elaborated in detail in the present invention belong to the existing technologies known to those skilled in the art.

Claims

1. A centrifugal casting device for the production of drainage pipes, characterized in that: It includes a centrifugal body, a blocking mechanism and a material taking mechanism; One end of the centrifugal body is a feed end, and the other end is a discharge end, and the discharge end is open; The blocking mechanism is arranged at one side of the discharge end and is used to block the open part of the centrifugal body to form a closed space for processing the drainage pipe; The material taking mechanism is connected to the outside of the blocking mechanism and is used to take out the cast drain pipe; The centrifugal body comprises a centrifugal cylinder (3), and the right side of the centrifugal cylinder (3) is open; The blocking mechanism comprises an electric guide rail (6), a movable plate (7), a connecting frame (8), a mounting ring (9), a blocking ring (10) and a convex strip (11); An electric guide rail (6) is installed on the bottom frame (1), a moving plate (7) is connected to the slider of the electric guide rail (6), a connecting frame (8) is connected to the moving plate (7), a mounting ring (9) is connected to the connecting frame (8), a sealing ring (10) for sealing the open portion on the right side of the centrifugal cylinder (3) is rotatably connected to the outside of the mounting ring (9), the sealing ring (10) is in contact with the inner wall of the centrifugal cylinder (3), a convex strip (11) is connected to the sealing ring (10), a groove (12) adapted to the convex strip (11) is opened in the centrifugal cylinder (3), and the convex strip (11) and the groove (12) are slidably matched; The material taking mechanism comprises an electric push rod (13), a mounting plate (14), a rotating plate (15), a servo motor (16), a sliding rod (18) and a contact block (19). The electric push rod (13) is mounted on the connecting frame (8). The mounting plate (14) is connected to the telescopic rod of the electric push rod (13). The mounting plate (14) is located in the mounting ring (9). The mounting plate (14) and the inner wall of the mounting ring (9) are in contact. The rotating plate (15) is rotatably connected to the mounting plate (14). The servo motor (16) is mounted on the mounting plate (14). The output shaft of the machine (16) is connected to the middle of the rotating disk (15), the rotating disk (15) is provided with an arc groove (17), the mounting disk (14) is slidably connected with a slide bar (18), one end of the slide bar (18) close to the rotating disk (15) is located in the arc groove (17), and the slide bar (18) is connected to a contact block (19). The rotating disk (15) rotates through the arc groove (17) to drive the slide bar (18) to move, and the slide bar (18) drives the contact block (19) to move, so that the contact block (19) contacts the inner wall of the cast drainage pipe; The invention also comprises a positioning mechanism, which comprises a connecting block (25), a sliding rod (26), a friction block (27), a contact rod (28), a spring (29) and a wedge block (30). The movable plate (7) is connected to the connecting block (25), the connecting block (25) is slidably connected to the sliding rod (26), the sliding rod (26) is connected to the friction block (27), the friction block (27) moves downward and contacts the blocking ring (10), and the friction block (27) can increase the resistance of the blocking ring (10) to rotation. The friction block (27) is connected to the contact rod (28), the contact rod (28) slides through the connecting block (25), a spring (29) is connected between the contact rod (28) and the connecting block (25), and the base frame (1) is connected to the wedge block (30), and the lower end of the contact rod (28) contacts the inclined surface (31) of the wedge block (30).

2. A centrifugal casting device for drain pipe production according to claim 1, characterized in that: The centrifugal body further comprises a base frame (1), a mounting frame (4), a feed hopper (5) and an electric roller (2); four electric rollers (2) are mounted on the top of the base frame (1); a centrifugal cylinder (3) is placed on the rolling surface formed by the four electric rollers (2); the base frame (1) is connected to the mounting frame (4); the mounting frame (4) is connected to the feed hopper (5); the right end of the feed hopper (5) is rotatably connected to the left side of the centrifugal cylinder (3); the feed hopper (5) extends into the centrifugal cylinder (3); the feed hopper (5) and the centrifugal cylinder (3) are in communication; the metal liquid flows into the centrifugal cylinder (3) through the feed hopper (5); the electric roller (2) drives the centrifugal cylinder (3) to rotate, so that the metal liquid in the centrifugal cylinder (3) performs centrifugal motion, thereby casting the drainage pipe.

3. A centrifugal casting device for producing drainage pipes according to claim 2, characterized in that: The centrifugal cylinder (3) is connected to the outside of the centrifugal cylinder (3), the thermal insulation ring (20) is in contact with the electric roller (2), the centrifugal cylinder (3) and the thermal insulation ring (20) are connected via the thermal insulation ring (21), an air outlet hole (22) is formed on the thermal insulation ring (20), the thermal insulation ring (20) is rotatably connected to the outside of the thermal insulation ring (20), the air outlet hole (22) is located in the annular frame (23), the bottom frame (1) is connected to the thermal insulation plate (231), the connecting plate (231) and the annular frame (23) are connected, and the annular frame (23) is connected to the air outlet pipe (24).

4. A centrifugal casting device for producing drainage pipes according to claim 1, characterized in that: It also includes a friction ring (32), and the friction ring (32) is connected to the sealing ring (10).

5. A centrifugal casting device for producing drainage pipes according to claim 1, characterized in that: It also includes a contact wheel (33), the lower end of the contact rod (28) is rotatably connected to the contact wheel (33), and the contact wheel (33) is in contact with the inclined surface (31) of the wedge block (30).

6. A centrifugal casting device for producing drainage pipes according to claim 5, characterized in that: The invention also comprises a protective cover (34), the protective cover (34) for protecting the rotating disk (15) and the sliding rod (18) is connected to the mounting disk (14), the rotating disk (15) and the sliding rod (18) are both located in the protective cover (34), and the contact block (19) slides through the protective cover (34).

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