A pneumatic mold brake device for centrifugal casting machine of cast iron pipe

Abstract

The invention discloses a pneumatic cast iron pipe centrifugal casting machine mold brake device, comprising a brake metal block, a brake transmission part and a brake power part, one end of the brake transmission part is connected to the brake metal block, and the other end is connected to the brake power part; the brake transmission part comprises a transmission lever and a lever support, the transmission lever is installed on the lever support through a pin shaft, the transmission lever is a "∟"-shaped structure, including an integrated horizontal rod and a vertical rod, and the free end of the vertical rod is fixedly connected to the brake metal block located on the upper part thereof; the brake power part comprises a cylinder with an ear shaft and a cylinder support, the upper end of the cylinder with an ear shaft is installed on the ear plate at the tail of the horizontal rod of the transmission lever through a pin shaft, and the cylinder with an ear shaft is connected to the cylinder support through its ear shaft. The invention can carry out targeted, simple and efficient braking of the high-speed rotating cast pipe mold, reduce the wear of the key parts of the cast pipe mold, and extend the service life of the cast pipe mold.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifugal casting equipment for cast iron pipes, and in particular relates to a pneumatic mold braking device for a centrifugal casting machine for cast iron pipes. Background Art

[0002] The braking device of the traditional cast iron pipe centrifugal casting equipment is an electromagnetic brake type braking device for the main engine motor pulley. This type of braking device has the following disadvantages:

[0003] 1. The brake-type braking method acts on the motor pulley to reduce the rotation speed of the active supporting wheel, and then the friction between the low-speed active supporting wheel and the high-speed rotating casting pipe mold realizes the speed reduction. However, the friction between the active supporting wheel and the casting pipe mold is the "roller" part of the casting pipe mold. Long-term friction will cause stress damage on the surface of the casting pipe mold, thereby increasing the axial runout in the "casting" state of high-speed rotation of the mold. This not only reduces the service life of the equipment and mold, but also indirectly affects the quality of the centrifugal casting pipe.

[0004] 2. The effective mechanism of electromagnetic brake has high conduction loss, complex structure and cumbersome on-site debugging.

[0005] 3. The on-site environment for centrifugal casting of cast iron pipes is relatively harsh, with high temperature, high humidity, and metal powder, which poses a hidden danger to the stability of the operating effect of the electromagnetic brake mechanism. Summary of the invention

[0006] In view of this, the object of the present invention is to provide a pneumatic cast iron pipe centrifugal casting machine mold brake device with simple structure, stable operation, strong operability and low energy consumption, so as to solve the shortcomings of the above-mentioned traditional electromagnetic brake type brake device.

[0007] In order to achieve the above-mentioned invention object, the technical solution adopted is as follows:

[0008] A pneumatic cast iron pipe centrifugal casting machine mold brake device, comprising a brake metal block for directly acting on the outer surface of the casting pipe mold to brake it, a brake transmission part and a brake power part, one end of the brake transmission part is connected to the brake metal block, and the other end is connected to the brake power part; the brake metal block directly contacts the outer surface of the casting pipe mold during the braking action and generates friction to reduce the speed of the casting pipe mold, the brake transmission part plays a force transmission role during the braking action, and the brake power part is used to provide power for the mold braking action;

[0009] The brake transmission part includes a transmission lever and a lever support. The transmission lever is installed on the lever support through a pin shaft. The transmission lever and the lever support are connected through a "pin shaft" structure. The structure is simple and reliable while meeting the requirement that the lever structure can be pried. The transmission lever is a "∟"-shaped structure, including an integrated horizontal rod and a vertical rod. The free end of the vertical rod is fixedly connected to the brake metal block located on the upper part thereof.

[0010] The braking power part includes a cylinder with an ear shaft and a cylinder support. The upper end of the cylinder with an ear shaft is installed on the ear plate at the tail of the horizontal rod of the transmission lever through a pin shaft to provide power for the braking of the casting pipe mold. The cylinder with an ear shaft is connected to the cylinder support through its ear shaft.

[0011] Preferably, the pneumatic cast iron pipe centrifugal casting machine mold brake device will be installed on one side of the main engine motor of the cast iron pipe centrifugal casting machine, and will directly perform friction braking on the casting pipe mold after the main engine part completes the casting process.

[0012] Preferably, the lever support is fixed to a preset foundation of the centrifugal casting equipment mainframe by anchor screws, so that the transmission lever is perpendicular to the casting pipe mold in the direction, providing a "fulcrum" for the entire braking lever action.

[0013] Preferably, the length direction of the horizontal rod of the transmission lever forms a right angle of 90° with the length direction of the vertical rod, and the length dimension of the horizontal rod is greater than the length dimension of the vertical rod.

[0014] Preferably, the distance between the cylinder with trunnion and the lever support is much greater than the distance between the brake metal block and the lever support, which can reduce the force that the cylinder with trunnion has to bear during the braking process.

[0015] Preferably, the cylinder support is fixed to a preset foundation of the centrifugal casting equipment main unit by anchor screws to provide fixation for the cylinder with trunnion. Due to the fixed characteristics of the trunnion, the cylinder with trunnion can rotate on the cylinder support at an angle with the trunnion as the center.

[0016] Preferably, the cylinder with ear shaft receives an electrical signal from the master control system through an electromagnetic valve connected to the overall control circuit of the centrifugal casting equipment to control the cylinder to stretch and contract in a timely manner, thereby braking the casting pipe mold in coordination with the overall process of the centrifugal casting equipment.

[0017] The beneficial effects of the present invention are as follows: the present invention uses a transmission lever driven by an ear shaft cylinder controlled by an electrical signal to complete the braking effect, the structure is simple and the operability is strong, and it is easy to debug and perform daily maintenance and inspection; the braking action directly acts on the casting pipe mold itself, the action mechanism is efficient and reliable, and the overall operation efficiency and stability of the centrifugal casting pipe equipment are greatly improved; there is no need to worry that the braking metal block will be overheated due to high-speed friction with the outer wall of the casting pipe mold, because it will be cooled together with the casting pipe mold before the "pipe pulling" process; compared with the traditional electromagnetic brake type braking equipment, it does not interact with the roller of the casting pipe mold, thereby extending the service life of the casting pipe mold and indirectly improving the quality of the produced cast pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0022] Example 1

[0023] like Figure 1 As shown, a pneumatic cast iron pipe centrifugal casting machine mold brake device comprises a brake metal block 100 for directly acting on the outer surface of a casting pipe mold 400 to brake it, a brake transmission part 200 and a brake power part 300, one end of the brake transmission part 200 is connected to the brake metal block 100, and the other end is connected to the brake power part 300; the brake metal block 100 directly contacts the outer surface of the casting pipe mold 400 during the braking action and generates friction to reduce the speed of the casting pipe mold 400, the brake transmission part 200 plays a force transmission role during the braking action, and the brake power part 300 is used to provide power for the braking action of the mold 400;

[0024] The brake transmission part 200 includes a transmission lever 210 and a lever support 220. The transmission lever 210 is installed on the lever support 220 through a pin shaft. The transmission lever 210 and the lever support 220 are connected through a "pin shaft" structure. The structure is simple and reliable while meeting the requirement that the lever structure can be pried. The transmission lever 210 is a "∟"-shaped structure, including an integrated horizontal rod 212 and a vertical rod 211. The free end of the vertical rod 211 is fixedly connected to the brake metal block 100 located on the upper part thereof;

[0025] The braking power part 300 includes a cylinder with an ear shaft 310 and a cylinder support 320. The upper end of the cylinder with an ear shaft 310 is installed on the ear plate 311 at the tail of the horizontal rod 212 of the transmission lever 210 through a pin shaft to provide power for the braking of the casting pipe mold 400. The cylinder with an ear shaft 310 is connected to the cylinder support 320 through its ear shaft. The connection method between the cylinder with an ear shaft 310 and the cylinder support 320 is similar to a pin shaft connection, so that the cylinder with an ear shaft 310 can rotate on the cylinder support 320 with the ear shaft as the center.

[0026] The pneumatic cast iron pipe centrifugal casting machine mold brake device will be installed on one side of the main engine motor of the cast iron pipe centrifugal casting machine, and will directly perform friction braking on the cast pipe mold 400 after the main engine part completes the casting process.

[0027] The lever support 220 is fixed to the preset foundation of the centrifugal casting equipment mainframe by anchor screws, so that the transmission lever 210 is perpendicular to the casting pipe mold 400, providing a "fulcrum" for the entire braking lever action.

[0028] Example 2

[0029] Based on the structure of Example 1, in Example 2, the length direction of the horizontal rod 212 of the transmission lever 210 is at a right angle of 90° to the length direction of the vertical rod 211 , and the length dimension of the horizontal rod 212 is greater than the length dimension of the vertical rod 211 .

[0030] Example 3

[0031] Based on the structure of Example 1, in Example 3, the distance between the cylinder with ear shaft 310 and the lever support 220 is much larger than the distance between the brake metal block 100 and the lever support 220, which can reduce the force that the cylinder with ear shaft 310 has to bear during the braking process.

[0032] In Examples 1-3,

[0033] The cylinder support 320 is fixed to the preset foundation of the centrifugal casting equipment main unit by anchor screws to fix the cylinder with ear shaft 310. Due to the fixed characteristics of the ear shaft, the cylinder with ear shaft 310 can rotate on the cylinder support 320 with the ear shaft as the center.

[0034] The cylinder 310 with ear shaft receives the electrical signal from the master control system through the solenoid valve connected to the overall control circuit of the centrifugal casting equipment to control the cylinder to stretch and contract in time, and brake the casting pipe mold 400 in coordination with the overall process of the centrifugal casting equipment.

[0035] The pneumatic cast iron pipe centrifugal casting machine mold braking device involved in the present invention will only brake the casting pipe mold 400 once during the production process of a cast iron pipe. It can also be said that the cast iron pipe centrifugal casting equipment will only brake the casting pipe mold 400 when preparing for the "pipe pulling" process.

[0036] Working principle:

[0037] 1. After the pouring process is completed and before the pipe pulling process, the pipe casting mold 400 with the cast pipe still in a red-hot state needs to be braked to make it still and prepare for pipe pulling. At this time, the solenoid valve with the trunnion cylinder 310 receives an electrical signal from the program control system;

[0038] 2. The cylinder 310 with trunnion receives the electrical signal and contracts;

[0039] 3. The end of the transmission lever 210 is subjected to the contraction force of the trunnion cylinder 310 and moves downward;

[0040] 4. Due to the lever effect, the front end of the transmission lever 210 rises upward, driving the brake metal block 100 to continuously contact and rub against the casting pipe mold 400, thereby braking the casting pipe mold 400;

[0041] 5. The pipe casting mold 400 is turned to a stationary state by braking, and is ready for the "pipe pulling" process;

[0042] 6. The cylinder 310 with ear shaft is stretched under the control of the electric signal, and the tail of the transmission lever 210 rises upward.

[0043] 7. Due to the lever action, the front end of the transmission lever 210 drives the brake metal block 100 to leave the outer surface of the casting pipe mold 400, and the braking effect ends.

[0044] The present invention can carry out targeted, simple and efficient braking of the high-speed rotating casting pipe mold during the centrifugal casting of the cast iron pipe, thereby improving the overall efficiency of the centrifugal casting equipment for the cast iron pipe, reducing the wear of key parts of the casting pipe mold, extending the service life of the casting pipe mold, and indirectly improving the quality of the main pipe product.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, component splitting or combination, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pneumatic mold brake device for a centrifugal cast iron pipe casting machine, characterized in that: It includes a brake metal block for directly acting on the outer surface of the casting pipe mold to brake it, a brake transmission part and a brake power part, one end of the brake transmission part is connected to the brake metal block, and the other end is connected to the brake power part; The brake transmission part includes a transmission lever and a lever support, the transmission lever is installed on the lever support through a pin shaft, the transmission lever is a "∟"-shaped structure, including an integrated horizontal rod and a vertical rod, and the free end of the vertical rod is fixedly connected to the brake metal block located on the upper part thereof; The braking power part includes a cylinder with a trunnion and a cylinder support. The upper end of the cylinder with a trunnion is installed on the trunnion plate at the tail of the horizontal rod of the transmission lever through a pin shaft to provide power for the braking of the casting pipe mold. The cylinder with a trunnion is connected to the cylinder support through its trunnion. The pneumatic cast iron pipe centrifugal casting machine mold brake device will be installed on one side of the main engine motor of the cast iron pipe centrifugal casting machine, and will directly perform friction braking on the casting pipe mold after the main engine part completes the casting process; The lever support is fixed on the preset foundation of the centrifugal casting equipment mainframe by anchor screws, so that the transmission lever is perpendicular to the casting pipe mold in the direction, providing a "fulcrum" for the entire braking lever action; The length direction of the horizontal rod of the transmission lever forms a right angle of 90° with the length direction of the vertical rod, and the length dimension of the horizontal rod is greater than the length dimension of the vertical rod; The distance between the trunnion cylinder and the lever support is much greater than the distance between the brake metal block and the lever support, which can reduce the force that the trunnion cylinder has to bear during the braking process; The cylinder support is fixed to the preset foundation of the centrifugal casting equipment mainframe by anchor screws, providing fixation for the cylinder with trunnion. Due to the fixed characteristics of the trunnion, the cylinder with trunnion can rotate on the cylinder support with the trunnion as the center. The cylinder with ear shaft receives the electrical signal from the master control system through the solenoid valve connected to the overall control circuit of the centrifugal casting equipment to control the cylinder to stretch and contract in time, and brake the casting pipe mold in coordination with the overall process of the centrifugal casting equipment.

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