Combined cylinder control system for core frame of centrifugal pipe casting machine
By designing a centrifugal cast tube movement assembly cylinder combination cylinder control system including rack cylinder, telescopic cylinder, angle encoder and position encoder, the problem of accurately controlling the angle of the core swing arm in the prior art is solved, and the effect of improving the quality of the cast iron pipe port and the utilization rate of the sand core is achieved.
Patent Information
- Application Number
- CN202420680373.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-02
AI Technical Summary
Existing centrifugal pipe casting machines cannot accurately control the angle of the core frame swing arm, which affects the bearing forming quality of cast iron pipes and the utilization rate of sand core.
A centrifugal cast tube movement rack combination cylinder control system is designed, including rack cylinder, telescopic cylinder, angle encoder and position encoder, and the angle and position are changed through the hydraulic power drive core arm to achieve precise control.
By precisely controlling the swing angle, compression position and pressure of the core arm, the bearing quality of the cast iron pipe and the utilization rate of the sand core are improved.
Smart Images
Figure CN222607956U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of combined cylinders, in particular to a control system for combined cylinders of a core frame of a centrifugal pipe casting machine. Background Art
[0002] In the ductile iron pipe production line, the water-cooled centrifugal pipe casting machine is the main equipment for producing ductile iron pipes. The core rack device is one of the main equipment of the centrifugal pipe casting machine, which is mainly used for the installation and compaction of the socket sand core. The control accuracy of the core rack device is directly related to the ductile iron pipe socket forming and the forming quality.
[0003] The existing centrifugal pipe casting machine has the problem of not being able to accurately control the angle of the core frame swing arm;
[0004] According to the process equipment characteristics of a water-cooled centrifugal pipe casting machine for large-sized ductile iron pipes, a core frame combined cylinder control system of a centrifugal pipe casting machine for ductile iron pipes is designed. The control system can accurately control the core frame swing arm angle, the core frame pressing position and the pressure according to the equipment adjustment requirements during the production of cast iron pipes of different specifications, so as to improve the socket quality of the cast iron pipe and the utilization rate of the sand core. Utility Model Content
[0005] In view of the deficiencies in the prior art, the utility model provides a centrifugal pipe casting machine core frame combined cylinder control system, which solves the problem that the centrifugal pipe casting machine cannot accurately control the core frame swing arm angle.
[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a centrifugal pipe casting machine core frame combined cylinder control system, including a pipe casting machine body, the outer surface of the pipe casting machine body is provided with a control mechanism, the control mechanism includes a rack cylinder, the rack cylinder is installed above the pipe casting machine body, an angle encoder is installed outside the angle encoder, the angle encoder is used to control the rotation angle of the rack cylinder, a telescopic cylinder is installed outside the rack cylinder, a core frame arm is arranged on the side of the telescopic cylinder, the core frame arm changes position by the telescopic cylinder, the core frame arm changes angle by the rack cylinder, the core frame body is installed outside the pipe casting machine body, the core frame arm is arranged outside the core frame body, and the core frame arm is used to control the operation of the core frame body.
[0007] Preferably, a position encoder is provided above the telescopic cylinder, and the position encoder is used to control the moving position of the core frame arm.
[0008] Preferably, a pipe mold is installed outside the pipe casting machine body, a sand core is arranged outside the pipe mold, the sand core is installed outside the pipe casting machine body, and the core frame is installed outside the sand core.
[0009] Preferably, a signal receiving board is installed above the core frame arm, and the signal receiving board is arranged outside the telescopic cylinder.
[0010] Preferably, throttles are provided on both sides of the rack cylinder.
[0011] Preferably, a first proportional valve is installed inside the rack cylinder, a second proportional valve is installed inside the telescopic cylinder, and a proportional pressure reducing valve is arranged inside the telescopic cylinder.
[0012] The utility model discloses a centrifugal pipe casting machine core frame combined cylinder control system, which has the following beneficial effects: in the centrifugal pipe casting machine core frame combined cylinder control system, the cast iron pipe socket sand core is installed on the core frame body, and under the drive of hydraulic power, the telescopic cylinder piston rod is fully extended to drive the core frame arm to move forward, the rack cylinder drives the core frame arm to swing to a specified angle, and the telescopic cylinder piston rod is retracted to a specified position, at which time the core frame arm presses the sand core on the core frame body onto the pipe mold on the pipe casting machine body, and then according to the production process requirements, molten iron is poured to finally form the cast iron pipe, and the swing angle of the core frame arm, the pressing position of the core frame body and the pressure are accurately controlled according to the equipment adjustment requirements when producing cast iron pipes of different specifications, so as to improve the quality of the cast iron pipe socket and the utilization rate of the sand core. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a schematic diagram of the core frame combined cylinder equipment of the centrifugal pipe casting machine for ductile iron pipes of the utility model;
[0016] Figure 3 This is a schematic diagram of the hydraulic control principle of the core frame combined cylinder of the centrifugal pipe casting machine for ductile iron pipes of the utility model;
[0017] Figure 4 This is a schematic diagram of the appearance of the core frame combined cylinder of the centrifugal pipe casting machine of the utility model;
[0018] Figure 5 This is a schematic diagram of electrical signal given by the control system of the utility model;
[0019] Figure 6 This is a schematic diagram of the electrical signal given by the proportional pressure reducing valve of the control system of the utility model.
[0020] In the figure: 1. pipe casting machine body; 2. rack cylinder; 3. position encoder; 4. telescopic cylinder; 5. signal receiving board; 6. core frame arm; 7. core frame body; 8. sand core; 9. pipe mold; 10. angle encoder; 11. proportional pressure reducing valve; 12. throttle; 13. first proportional valve; 14. second proportional valve. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] The embodiment of the present application solves the problem that the centrifugal pipe casting machine cannot accurately control the core frame swing arm angle by providing a centrifugal pipe casting machine core frame combined cylinder control system.
[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0024] The utility model embodiment discloses a centrifugal pipe casting machine core frame combined cylinder control system.
[0025] According to the attached Figure 1-6 As shown, it includes a pipe casting machine body 1, and a control mechanism is arranged on the outer surface of the pipe casting machine body 1. The control mechanism includes a rack cylinder 2, and the rack cylinder 2 is installed above the pipe casting machine body 1. An angle encoder 10 is installed outside the angle encoder 10. The angle encoder 10 is used to control the rotation angle of the rack cylinder 2. A telescopic cylinder 4 is installed outside the rack cylinder 2. A core frame arm 6 is arranged on the side of the telescopic cylinder 4. The core frame arm 6 changes its position through the telescopic movement of the telescopic cylinder 4, and the core frame arm 6 changes its angle through the rack cylinder 2.
[0026] A core frame body 7 is installed on the outside of the pipe casting machine body 1, a core frame arm 6 is arranged on the outside of the core frame body 7, the core frame arm 6 is used to control the operation of the core frame body 7, a position encoder 3 is arranged above the telescopic cylinder 4, the position encoder 3 is used to control the moving position of the core frame arm 6, a pipe mold 9 is installed on the outside of the pipe casting machine body 1, a sand core 8 is arranged on the outside of the pipe mold 9, the sand core 8 is installed on the outside of the pipe casting machine body 1, and the core frame body 7 is installed on the outside of the sand core 8.
[0027] A signal receiving plate 5 is installed above the core frame arm 6, and the signal receiving plate 5 is arranged outside the telescopic cylinder 4. Throttle 12 is arranged on both sides of the rack cylinder 2. A first proportional valve 13 is installed inside the rack cylinder 2, a second proportional valve 14 is installed inside the telescopic cylinder 4, and a proportional pressure reducing valve 11 is arranged inside the telescopic cylinder 4.
[0028] The socket sand core 8 of the cast iron pipe is installed on the core frame body 7. Under the drive of hydraulic power, the piston rod of the telescopic cylinder 4 is fully extended to drive the core frame arm 6 forward, and the rack cylinder 2 drives the core frame arm 6 to swing to a specified angle. The piston rod of the telescopic cylinder 4 shrinks to a specified position. The core frame arm 6 presses the sand core 8 on the core frame body 7 onto the pipe mold 9 on the pipe casting machine body 1, and then pours molten iron according to the production process requirements to finally form the cast iron pipe. Due to the molding requirements of cast iron pipes of different specifications, the equipment and process parts such as sand core 8, pipe mold 9, core frame body 7 are different, and the swing angle, pressing position and pressure of the core frame arm 6 are very different. Therefore, the core frame body 7 is required to control the rack cylinder 2 and the telescopic cylinder 4 to achieve precise control of angle, position and pressure.
[0029] The core frame combination cylinder control system consists of a rack cylinder 2, a telescopic cylinder 4, a core frame arm 6, a core frame body 7, and a control device consisting of an angle encoder 10, a position encoder 3, a telescopic cylinder 4, and a signal receiving board 5. The hydraulic system is responsible for providing power to the rack cylinder 2 and the telescopic cylinder 4 to drive the rack cylinder 2 and the telescopic cylinder 4 to drive the core frame arm 6 to extend and swing. The signal receiving board 5 provides control signals according to the requirements of cast iron pipes of different specifications. The angle encoder 10 and the position encoder 3 give the position and angle value of the core frame body 7. The present invention adopts a hydraulic proportional valve for control. The advantage of proportional valve control is that it can perform precise stepless control. The first proportional valve 13 and the second proportional valve 14 control the switch of the combination cylinder, which can conveniently perform stepless speed regulation. The first proportional valve 13 and the second proportional valve 14 can give different pressure values. The first proportional valve 13 and the second proportional valve 14 can be opened and closed according to the angle and position given by the angle encoder 10 and the position encoder 3.
[0030] An angle encoder 10 and a position encoder 3 are used. The angle encoder 10 controls the swing angle of the core frame, and the position encoder 3 controls the clamping position of the core frame. Hydraulic proportional control is adopted. The proportional reversing valve controls the swing, telescopic stepless speed regulation, and opening and closing of the core frame arm 6. The proportional pressure reducing valve 11 realizes that the clamping pressure of the core frame arm 6 can be adjusted arbitrarily.
[0031] In summary, compared with the prior art, the present invention has the following beneficial effects:
[0032] The sand core 8 of the socket of the cast iron pipe is installed on the core frame body 7. Under the drive of hydraulic power, the piston rod of the telescopic cylinder 4 is fully extended to drive the core frame arm 6 forward, and the rack cylinder 2 drives the core frame arm 6 to swing to a specified angle. The piston rod of the telescopic cylinder 4 shrinks to a specified position. The core frame arm 6 presses the sand core 8 on the core frame body 7 onto the pipe mold 9 on the pipe casting machine body 1, and then molten iron is poured according to the production process requirements to finally form the cast iron pipe. The swing angle of the core frame arm 6, the pressing position of the core frame body 7 and the pressure are accurately controlled according to the equipment adjustment requirements during the production of cast iron pipes of different specifications, so as to improve the quality of the socket of the cast iron pipe and the utilization rate of the sand core 8.
[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A centrifugal pipe casting machine core frame combined cylinder control system, comprising a pipe casting machine body (1), wherein the outer surface of the pipe casting machine body (1) is provided with a control mechanism, wherein the control mechanism comprises: A rack cylinder (2) installed above the pipe casting machine body (1); An angle encoder (10) is installed outside the angle encoder (10), and the angle encoder (10) is used to control the rotation angle of the rack cylinder (2); A telescopic cylinder (4) mounted outside the rack cylinder (2); A core frame arm (6) is arranged on the side of the telescopic cylinder (4), the core frame arm (6) changes position through the telescopic cylinder (4), and the core frame arm (6) changes angle through the rack cylinder (2); The core frame body (7) is installed outside the pipe casting machine body (1), and the core frame arm (6) is arranged outside the core frame body (7). The core frame arm (6) is used to control the operation of the core frame body (7).
2. According to claim 1, a centrifugal casting pipe core frame combined cylinder control system is characterized in that: A position encoder (3) is arranged above the telescopic cylinder (4), and the position encoder (3) is used to control the moving position of the core frame arm (6).
3. According to claim 1, a centrifugal casting pipe core frame combined cylinder control system is characterized in that: A pipe mold (9) is installed outside the pipe casting machine body (1), a sand core (8) is arranged outside the pipe mold (9), the sand core (8) is installed outside the pipe casting machine body (1), and the core frame body (7) is installed outside the sand core (8).
4. According to claim 1, a centrifugal casting machine core frame combined cylinder control system is characterized in that: A signal receiving plate (5) is installed above the core frame arm (6), and the signal receiving plate (5) is arranged outside the telescopic cylinder (4).
5. According to claim 1, a centrifugal casting pipe core frame combined cylinder control system is characterized in that: Throttle (12) are arranged on both sides of the rack cylinder (2).
6. A centrifugal casting machine core frame combined cylinder control system according to claim 1, characterized in that: A first proportional valve (13) is installed inside the rack cylinder (2), a second proportional valve (14) is installed inside the telescopic cylinder (4), and a proportional pressure reducing valve (11) is provided inside the telescopic cylinder (4).