Release agent spraying device for nodular cast iron pipe production

The automated release agent spraying device enables uniform spraying of release agent in the production of ductile iron pipes, solving the problem of uneven spraying in traditional manual spraying and improving production efficiency and product quality.

CN224167783UActive Publication Date: 2026-04-28ZHANGJIAGANG HONGYI DUCTILE IRON CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHANGJIAGANG HONGYI DUCTILE IRON CO LTD
Filing Date
2025-05-14
Publication Date
2026-04-28

AI Technical Summary

Technical Problem

Traditional manual spraying of release agents is difficult to ensure uniform distribution in the production of ductile iron pipes, resulting in inconsistent surface quality and difficulty in demolding, thus increasing the scrap rate.

Method used

An automated mold release agent spraying device was designed, comprising a fixed base, a moving mechanism, a dispensing box, and an atomizing nozzle. It achieves uniform spraying of the mold release agent through a high-pressure pump and a rotary joint, adapts to molds of different diameters, and achieves 360° uniform spraying through a motor-driven gear transmission.

Benefits of technology

This achieves a uniform coating of the release agent on the inner wall of the mold, improving production efficiency and product quality while reducing the scrap rate.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of nodular cast iron pipe production, in particular to a release agent spraying device for nodular cast iron pipe production, which comprises a release agent barrel and a high-pressure pump, and further comprises a fixed seat, a mounting cavity is formed in the fixed seat, a motor I is mounted in the mounting cavity, a motor shaft of the motor I is in transmission connection with a gear I, and the gear I is in transmission connection with a motor shaft of the motor II; and a connecting pipe is inserted and fixed in the mounting cavity. According to the spraying device, the rotatable distribution box and a plurality of atomizing nozzles which are arranged at equal angles are arranged, so that the distribution box can rotate by starting the motor I and enabling the gear I and the gear II to be in meshed transmission, a uniform release agent coating can be formed on the inner wall of a mold, and the problem of spraying uniformity is effectively solved; and the four moving mechanisms are fixedly connected to the outer wall of the fixing base at equal angles, so that the device can adapt to molds with different diameters, it is ensured that the device can automatically move along the inner walls of the molds and complete spraying operation, and the production efficiency is greatly improved.
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Description

Technical Field

[0001] This utility model relates to the field of ductile iron pipe production technology, specifically a release agent spraying device for ductile iron pipe production. Background Technology

[0002] Ductile iron pipes are made by adding a spheroidizing agent to molten iron before casting to spheroidize the graphite, reduce stress concentration, and give the pipes advantages such as high strength, high elongation, impact resistance, corrosion resistance, and good sealing performance. In the production process of ductile iron pipes, a release agent is usually sprayed onto the centrifugal casting mold during the preparation stage. Spraying the release agent can prevent the molten iron from sticking to the mold and ensure that the cast pipe can be successfully demolded.

[0003] Traditional mold release agent spraying methods mainly rely on manual operation, with operators holding spray guns to spray the agent onto the inner wall of the mold. However, manual spraying makes it difficult to ensure the uniform distribution of the mold release agent on the inner wall of the mold, and it is easy to have inconsistent spray thickness. This not only affects the surface quality of ductile iron pipes, but may also lead to demolding difficulties and increase the scrap rate in the production process. Utility Model Content

[0004] The purpose of this invention is to provide a release agent spraying device for ductile iron pipe production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mold release agent spraying device for ductile iron pipe production includes a mold release agent tank and a high-pressure pump, and further includes:

[0007] A fixed base has an internal mounting cavity, a motor is installed inside the mounting cavity, a gear is driven to the motor shaft of the motor, and a connecting pipe is inserted and fixed inside the mounting cavity.

[0008] The moving mechanism has four parts, which are fixed at equal angles to the outer wall of the fixed base. The moving mechanism includes an electric push rod fixed to the fixed base. The output end of the electric push rod is fixedly connected to a connecting plate. The bottom surface of the connecting plate is provided with two mounting brackets. The interior of each mounting bracket is equipped with a moving wheel. The central shaft of each moving wheel is sleeved with a sprocket. The two sprockets are driven by a chain. One of the mounting brackets is fixedly connected to the outer wall of a motor.

[0009] The dispensing box has several atomizing nozzles installed at equal angles on its outer wall. A hollow rotating shaft is fixedly connected to the outer wall of the dispensing box. The hollow rotating shaft is rotatably connected to the outer wall of the fixed base. The end of the hollow rotating shaft is connected to a connecting pipe. A second gear is sleeved and fixed on the outer wall of the hollow rotating shaft. The second gear meshes with the first gear for transmission.

[0010] Furthermore, the connecting pipe is connected to the hollow rotating shaft via a rotary joint.

[0011] Furthermore, the high-pressure pump is connected to the mold release agent tank via a liquid extraction pipe, and the high-pressure pump is connected to the connecting pipe via a liquid delivery pipe.

[0012] Furthermore, a connecting rod is fixedly connected between the two mounting brackets.

[0013] Furthermore, the bottom surface of the connecting plate is fixedly connected to two telescopic rods, each of which includes a square rod. The bottom ends of the two square rods are fixedly connected to the top surfaces of the two mounting brackets, and the outer walls of the two square rods are slidably fitted with square sleeves. The top ends of the square sleeves are fixedly connected to the bottom surface of the connecting plate, and the outer walls of the square rods and square sleeves are fitted with springs.

[0014] Furthermore, the top surface of the connecting plate is fixedly connected to two telescopic rods, each telescopic rod including a round rod fixedly connected to the connecting plate, and a sleeve is slidably sleeved on the outer wall of the round rod, the sleeve being fixedly connected to the outer wall of the fixed seat.

[0015] Furthermore, the distribution box has a circular groove and several liquid dispensing channels inside, and the inner wall of the circular groove has slots at positions corresponding to the liquid dispensing channels.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By incorporating a rotatable distribution box and several atomizing nozzles arranged at equal angles, starting motor one engages gear one and gear two, causing the hollow rotating shaft to rotate the distribution box. This allows a uniform release agent coating to form on the inner wall of the mold, effectively solving the problem of spray uniformity.

[0018] 2. By fixing four moving mechanisms at equal angles to the outer wall of the fixed base, the device can adapt to molds of different diameters, ensuring that the device can automatically move along the inner wall of the mold and complete the spraying operation, which greatly improves production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a frontal view schematic diagram of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the present invention;

[0022] Figure 4-5 This is a schematic diagram of the moving mechanism structure in this utility model;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the distribution box in this utility model.

[0024] In the diagram: 100, fixed base; 110, mounting cavity; 120, connecting pipe; 121, rotary joint; 130, motor one; 140, gear one; 200, moving mechanism; 210, electric push rod; 220, connecting plate; 230, mounting bracket; 231, connecting rod; 240, moving wheel; 250, motor two; 260, sprocket; 270, chain; 280, telescopic rod one; 281, square rod; 282, square sleeve; 283, spring; 290, telescopic rod two; 291, round rod; 292, sleeve; 300, distribution box; 310, atomizing nozzle; 320, hollow rotating shaft; 321, gear two; 330, circular groove; 331, groove opening; 340, liquid distribution channel; 400, release agent tank; 500, high-pressure pump; 510, liquid extraction pipe; 520, liquid delivery pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] Please see Figure 1-6In this embodiment of the present invention, a mold release agent spraying device for ductile iron pipe production includes a mold release agent tank 400 and a high-pressure pump 500, as well as a fixed base 100, a moving mechanism 200, and a dispensing box 300. The fixed base 100 has an internal mounting cavity 110, and a motor 130 is fixedly mounted inside the mounting cavity 110. The motor shaft of the motor 130 is driven by a gear 140. A connecting pipe 120 is inserted and fixed inside the mounting cavity 110. Four moving mechanisms 200 are fixedly connected at equal angles to the outer wall of the fixed base 100. 00, used to support the inner wall of the mold while moving along the inner wall of the mold, the moving mechanism 200 includes an electric push rod 210 fixed to the fixed base 100, the output end of the electric push rod 210 is fixedly connected to a connecting plate 220, the bottom surface of the connecting plate 220 is symmetrically arranged with two mounting brackets 230, each of the two mounting brackets 230 is equipped with a moving wheel 240, the moving wheel 240 is made of polyurethane (PU) or rubber wheel, has good wear resistance and grip, and the central shaft of each of the two moving wheels 240 is sleeved and fixed with a sprocket 2. 60. Two sprockets 260 are driven by a chain 270. A second motor 250 is fixedly connected to the outer wall of one of the mounting brackets 230. The motor shaft of the second motor 250 is driven by its corresponding moving wheel 240, so that the two moving wheels 240 can rotate synchronously. A distribution box 300 is provided at one end of the fixed base 100. Several atomizing nozzles 310 are installed at equal angles on the outer wall of the distribution box 300. A hollow rotating shaft 320 is fixedly connected to the outer wall of the distribution box 300. The hollow rotating shaft 320 is rotatably connected to the outer wall of the fixed base 100. The end of the hollow rotating shaft 320 is connected to the end of the connecting pipe 120. Gear 2 321 is fixedly sleeved on the outer wall of the hollow rotating shaft 320 inside the mounting cavity 110. Gear 2 321 meshes with gear 1 140 for transmission. The connecting pipe 120 is connected to the hollow rotating shaft 320 through a rotary joint 121, so that the hollow rotating shaft 320 can rotate relative to the connecting pipe 120. The high-pressure pump 500 is connected to the release agent tank 400 through the liquid extraction pipe 510. The high-pressure pump 500 is connected to the connecting pipe 120 through the liquid delivery pipe 520.

[0028] Specifically, in use, the fixed base 100 is placed in the initial section inside the mold, and the four electric push rods 210 are extended according to the inner diameter of the mold, and the moving wheels 240 move outward until their surfaces contact the inner wall of the mold, so that the fixed base 100 is centered inside the mold. The liquid delivery pipe 520 on the high-pressure pump 500 is connected to the outer end of the connecting pipe 120, and the motor 250 is started, so that the moving wheels 240 rotate synchronously, thereby causing the four moving mechanisms 200 to drive the fixed base 100 to move axially along the inner wall of the mold. At the same time, the high-pressure pump 500 is started. The high-pressure pump 500 and motor 130 draw the release agent from the release agent tank 400, deliver it through the liquid delivery pipe 520 to the connecting pipe 120, and then through the hollow rotating shaft 320 into the distribution box 300. It is then sprayed out from several atomizing nozzles 310. The motor shaft of motor 130 is driven by gear 140, which meshes with gear 2 321. This causes gear 2 321 to drive the hollow rotating shaft 320 to rotate, which in turn causes the distribution box 300 to rotate. As the device moves, it sprays the inner wall of the mold uniformly in 360°.

[0029] like Figure 4-5 As shown, in this embodiment, a connecting rod 231 is fixedly connected between the two mounting brackets 230. Two telescopic rods 280 are symmetrically fixedly connected to the bottom surface of the connecting plate 220. Each telescopic rod 280 includes a square rod 281. The bottom ends of the two square rods 281 are fixedly connected to the top surfaces of the two mounting brackets 230, respectively. Square sleeves 282 are slidably fitted onto the outer walls of both square rods 281. The top ends of the square sleeves 282 are fixedly connected to the bottom surface of the connecting plate 220. Springs 283 are fitted onto the outer walls of the square rods 281 and the square sleeves 282. The two ends of the spring 283 are fixedly connected to the bottom surface of the connecting plate 220 and the top surface of the mounting bracket 230, respectively. Two telescopic rods 290 are fixedly connected to the top surface of the connecting plate 220. The two telescopic rods 290 are symmetrical about the electric push rod 210. The telescopic rod 290 includes a round rod 291 fixedly connected to the connecting plate 220. The bottom end of the round rod 291 is fixedly connected to the top surface of the connecting plate 220. A sleeve 292 is slidably sleeved on the outer wall of the round rod 291. The top end of the sleeve 292 is fixedly connected to the outer wall of the fixed seat 100.

[0030] In this embodiment, the second telescopic rod 290 and the electric push rod 210 connect the connecting plate 220 and the fixed seat 100, enhancing the stability of the moving mechanism 200 structure and the fixed seat 100. The first telescopic rod 280 is set between the moving wheel 240 and the connecting plate 220, playing a partial buffering role, allowing the moving wheel 240 to self-adjust within a certain range, compensating for the installation error of the moving wheel 240 or the slight unevenness of the inner wall of the mold, and ensuring that the moving wheel 240 always fits against the inner wall.

[0031] like Figure 6As shown, in this embodiment, the dispensing box 300 has a circular groove 330 and several dispensing channels 340 inside. The circular groove 330 is located at the center of the dispensing box 300 and is connected to the hollow rotating shaft 320. Several dispensing channels 340 are arranged at equal angles around the periphery of the circular groove 330 and are connected to several atomizing nozzles 310. The inner wall of the circular groove 330 has slots 331 at positions corresponding to the dispensing channels 340.

[0032] In practice, the release agent enters the circular groove 330 through the hollow rotating shaft 320. The release agent in the circular groove 330 is then distributed into several liquid distribution channels 340 through several slots 331, and finally sprayed evenly onto the inner wall of the mold through several atomizing nozzles 310.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mold release agent spraying device for ductile iron pipe production, comprising a mold release agent tank (400) and a high-pressure pump (500), characterized in that, Also includes: A fixed base (100) is provided inside the fixed base (100), and a motor (130) is installed inside the mounting cavity (110). The motor shaft of the motor (130) is connected to a gear (140). A connecting pipe (120) is inserted and fixed inside the mounting cavity (110). The moving mechanism (200) has four parts, which are fixed at equal angles to the outer wall of the fixed base (100). The moving mechanism (200) includes an electric push rod (210). The output end of the electric push rod (210) is fixedly connected to a connecting plate (220). The bottom surface of the connecting plate (220) is provided with two mounting brackets (230). The interior of each of the two mounting brackets (230) is equipped with a moving wheel (240). The central shaft of each of the two moving wheels (240) is sleeved and fixed with a sprocket (260). The two sprockets (260) are driven by a chain (270). The outer wall of one of the mounting brackets (230) is fixedly connected to a motor (250). A dispensing box (300) has several atomizing nozzles (310) installed at equal angles on its outer wall. A hollow rotating shaft (320) is fixedly connected to the outer wall of the dispensing box (300). The hollow rotating shaft (320) is rotatably connected to the outer wall of the fixed base (100). The end of the hollow rotating shaft (320) is connected to the connecting pipe (120). A gear two (321) is sleeved and fixed on the outer wall of the hollow rotating shaft (320). The gear two (321) meshes and drives with the gear one (140).

2. The mold release agent spraying device for ductile iron pipe production according to claim 1, characterized in that, The connecting pipe (120) is connected to the hollow rotating shaft (320) via a rotary joint (121).

3. The mold release agent spraying device for ductile iron pipe production according to claim 1, characterized in that, The high-pressure pump (500) is connected to the mold release agent tank (400) through the liquid extraction pipe (510), and the high-pressure pump (500) is connected to the connecting pipe (120) through the liquid delivery pipe (520).

4. The mold release agent spraying device for ductile iron pipe production according to claim 1, characterized in that, A connecting rod (231) is fixedly connected between the two mounting brackets (230).

5. The mold release agent spraying device for ductile iron pipe production according to claim 1, characterized in that, The bottom surface of the connecting plate (220) is fixedly connected to two telescopic rods (280). Each of the two telescopic rods (280) includes a square rod (281). The bottom ends of the two square rods (281) are fixedly connected to the top surfaces of the two mounting brackets (230). The outer walls of the two square rods (281) are slidably fitted with square sleeves (282). The top end of the square sleeves (282) is fixedly connected to the bottom surface of the connecting plate (220). The outer walls of the square rods (281) and the square sleeves (282) are fitted with springs (283).

6. The mold release agent spraying device for ductile iron pipe production according to claim 1 or 5, characterized in that, The top surface of the connecting plate (220) is fixedly connected to two telescopic rods (290). The telescopic rods (290) include a round rod (291) fixedly connected to the connecting plate (220). A sleeve (292) is slidably sleeved on the outer wall of the round rod (291). The sleeve (292) is fixedly connected to the outer wall of the fixed seat (100).

7. The mold release agent spraying device for ductile iron pipe production according to claim 1, characterized in that, The dispensing box (300) has a circular groove (330) and several liquid dispensing channels (340) inside. The inner wall of the circular groove (330) has a slot (331) at a position corresponding to the liquid dispensing channel (340).