Four-way valve pipeline inner wall polishing equipment

Abstract

The utility model relates to the technical field of four-way valves, in particular to four-way valve pipeline inner wall polishing equipment which comprises a box body, the position of a limiting rod is adjusted through an inserting hole in a fixing disc according to the inner diameter and the length of a four-way valve pipeline, preliminary positioning of a four-way valve is completed, the four-way valve pipeline is placed on a disc, a control switch is started, and the four-way valve pipeline is polished. The servo air cylinder starts to work, the output end of the servo air cylinder pushes the cross-shaped rod to move upwards, the cross-shaped rod drives the four moving frames to slide towards the inner wall of the pipeline along the sliding grooves and the sliding rods through the push-pull rod, the polishing wheel is made to be attached to the inner wall of the pipeline, and then the servo air cylinder controls the polishing wheel to conduct sliding polishing operation on the inner wall of the pipeline at proper pressure and frequency. In the polishing process, the four polishing wheels work cooperatively, the inner wall of the pipeline is ground at the same time, the polishing precision is guaranteed, after polishing is completed, the servo air cylinder drives the cross rod to move downwards, the movable frame and the polishing wheels retract, and the polished four-way valve pipeline is taken out conveniently.

Description

Technical Field

[0001] This utility model relates to the field of four-way valve technology, and in particular to a polishing device for the inner wall of a four-way valve pipe. Background Technology

[0002] A four-way valve, a hydraulic valve term, is a control valve with four ports. It is an indispensable component in refrigeration equipment. Its working principle is as follows: When the solenoid valve coil is de-energized, the pilot slide valve moves to the left under the drive of the compression spring on the right. High-pressure gas enters the capillary tube and then the right piston chamber. Meanwhile, gas in the left piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the left, connecting the exhaust pipe to the outdoor unit's connection pipe. The other two connection pipes are also connected, forming a refrigeration cycle. When the solenoid valve coil is energized, the pilot slide valve overcomes the tension of the compression spring and moves to the right under the magnetic force generated by the solenoid coil. High-pressure gas enters the capillary tube and then the left piston chamber. Meanwhile, gas in the right piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the right, connecting the exhaust pipe to the indoor unit's connection pipe. The other two connection pipes are also connected, forming a heating cycle. The basic condition for the four-way valve to switch directions is that the pressure difference (f1-f2) between the two ends of the piston must be greater than the frictional resistance f; otherwise, the four-way valve will not switch directions. The minimum operating pressure difference required for reversing (the actual level of Hualu is less than 1 kg / cm2) is guaranteed by the system flow rate.

[0003] In the manufacturing process of four-way valves, the smoothness of the pipe inner wall directly affects the valve's sealing performance, fluid resistance, and service life. Traditional manual polishing or simple mechanical polishing equipment is insufficient to meet the high-precision polishing requirements of the complex pipe inner walls of four-way valves, resulting in problems such as low polishing efficiency, poor uniformity, and cumbersome operation. Furthermore, the inner diameter and length of pipes vary between different specifications of four-way valves, making it impossible to flexibly adapt general-purpose equipment.

[0004] Therefore, there is an urgent need for a specialized polishing equipment that can polish efficiently and precisely, and is adjustable, so as to flexibly adapt to the different inner diameters and lengths of four-way valve pipes of different specifications, thereby improving the production quality and efficiency of four-way valves. This is the original intention of the design of this device. Summary of the Invention

[0005] The purpose of this invention is to provide a polishing device for the inner wall of a four-way valve pipe, which solves the problems mentioned in the background art, such as the difficulty in meeting the high-precision polishing requirements of the complex inner wall of four-way valve pipes, low polishing efficiency, poor uniformity, and cumbersome operation. Furthermore, different specifications of four-way valve pipes have different inner diameters and lengths, making it difficult for general-purpose equipment to be flexibly adapted.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a polishing device for the inner wall of a four-way valve pipe, comprising a housing, four anti-slip blocks fixedly installed on the lower surface of the housing, a control switch installed on one side of the housing, a disc fixedly installed on the upper surface of the housing, four movable frames movably installed on the upper surface of the disc, four polishing wheels fixedly installed on the side of the four movable frames close to each other, a limit component installed below the four polishing wheels, and a polishing assembly installed inside the housing.

[0007] The polishing assembly includes a sliding groove, and four sliding grooves are formed on the upper surface of the disc. The four sliding grooves are slidably connected to four movable frames.

[0008] The four slide grooves are each equipped with a slide rod, which is slidably connected to the four movable frames.

[0009] The lower surfaces of the four movable frames are rotatably connected to four push-pull rods, and the bottom ends of the four push-pull rods are rotatably connected to cross rods.

[0010] A servo cylinder is fixedly installed below the crossbar, and the output end of the servo cylinder is fixedly connected to the crossbar.

[0011] The limiting component includes a fixed plate, which is fixedly installed on the upper surface of the disc. Four limiting rods are inserted and connected to the upper surface of the fixed plate, and several insertion holes are formed on the upper surface of the fixed plate.

[0012] This invention relates to a polishing device for the inner wall of a four-way valve pipe. The polishing assembly employs an innovative structure where a servo cylinder drives a crossbar, linking four moving frames and polishing wheels via push-pull rods. When the servo cylinder operates, the up-and-down movement of the crossbar is converted into radial movement of the moving frames along the slide groove and slide bar via the push-pull rods, achieving synchronous extension and retraction of the four polishing wheels. This design adapts to four-way valve pipes with different inner diameters. This design overcomes the limitations of traditional single polishing heads, allowing four polishing wheels to simultaneously perform all-around polishing of the pipe's inner wall. This significantly improves polishing efficiency and ensures uniformity and consistency, effectively avoiding over- or under-polishing in certain areas. It meets the high-precision polishing requirements of four-way valves. The combination design of the fixed plate, limit rod, and insertion holes in the limiting assembly offers great flexibility. Several insertion holes on the fixed plate allow the limit rod to be inserted into the corresponding holes for fixation, based on the length and installation position of the four-way valve pipe. The limit rod positions and guides the polishing wheel's working area, ensuring stable operation within the designated area and preventing poor polishing results or pipe damage due to wheel misalignment. At the same time, this flexible limiting method allows the device to be adapted to various specifications of four-way valves, enhancing the equipment's versatility and practicality, reducing costs incurred by enterprises due to equipment incompatibility with different products, saving money for enterprises, and enhancing their competitiveness. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the disc of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the limiting component of this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the polishing component of this utility model.

[0018] In the diagram: 1. Housing; 2. Anti-slip block; 3. Control switch; 4. Disc; 5. Moving frame; 6. Polishing wheel; 7. Limiting component; 8. Polishing component; 9. Slide groove; 10. Slide rod; 11. Push-pull rod; 12. Cross rod; 13. Servo cylinder; 14. Fixed plate; 15. Limiting rod; 16. Socket. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please see Figures 1-4 This utility model provides a technical solution: a polishing device for the inner wall of a four-way valve pipe, including a housing 1. Four anti-slip blocks 2 are fixedly installed on the lower surface of the housing 1. A control switch 3 is installed on one side of the housing 1. A disc 4 is fixedly installed on the upper surface of the housing 1. Four movable frames 5 are movably installed on the upper surface of the disc 4. Four polishing wheels 6 are fixedly installed on the side of the four movable frames 5 close to each other. Limiting components 7 are installed below the four polishing wheels 6. Polishing components 8 are installed inside the housing 1. In use, the servo cylinder 13 is connected to the air compressor. First, according to the inner diameter and length of the four-way valve pipe, the position of the limiting rod 15 is adjusted through the insertion hole 16 on the fixed disc 14 to complete the initial positioning of the four-way valve. During the polishing process, the four polishing wheels 6 work together to polish the inner wall of the pipe at the same time to ensure polishing accuracy.

[0021] Please see Figures 1-2The polishing assembly 8 includes four grooves 9. Four grooves 9 are formed on the upper surface of the disc 4, and are slidably connected to four movable frames 5. Four sliding rods 10 are fixedly installed inside the four grooves 9, and are slidably connected to the four movable frames 5. Four push-pull rods 11 are rotatably connected to the lower surface of the four movable frames 5. A cross rod 12 is rotatably connected to the bottom end of each push-pull rod 11. A servo cylinder 13 is fixedly installed below the cross rod 12, and its output end is fixedly connected to the cross rod 12. When the control switch 3 is activated, the servo cylinder 13 begins to work. The servo cylinder 13 is an SMC model. CDQ2, whose output end pushes the cross rod 12 to move upward. The cross rod 12 drives the four moving frames 5 to slide along the slide groove 9 and slide bar 10 towards the inner wall of the pipe through the push-pull rod 11, so that the polishing wheel 6 fits against the inner wall of the pipe. Then, the servo cylinder 13 controls the polishing wheel 6 to perform sliding polishing operation on the inner wall of the pipe with appropriate pressure and frequency. During the polishing process, the four polishing wheels 6 work together to grind the inner wall of the pipe at the same time to ensure polishing accuracy. After polishing is completed, the servo cylinder 13 drives the cross rod 12 to move downward, and the moving frames 5 and polishing wheels 6 retract, making it easy to remove the polished four-way valve pipe.

[0022] Please see Figures 1-3 The limiting component 7 includes a fixed plate 14. The fixed plate 14 is fixedly installed on the upper surface of the disc 4. Four limiting rods 15 are inserted and connected to the upper surface of the fixed plate 14. Several insertion holes 16 are opened on the upper surface of the fixed plate 14. The four-way valve pipeline is placed on the disc 4. First, according to the inner diameter and length of the four-way valve pipeline, the position of the limiting rods 15 is adjusted through the insertion holes 16 on the fixed plate 14 to complete the initial positioning of the four-way valve.

[0023] Working principle: When in use, connect the servo cylinder 13 to the air compressor. First, adjust the position of the limit rod 15 according to the inner diameter and length of the four-way valve pipe through the insertion hole 16 on the fixed plate 14 to complete the initial positioning of the four-way valve. Place the four-way valve pipe on the disc 4, start the control switch 3, and the servo cylinder 13 starts to work. The servo cylinder 13 is model SMCCDQ2. Its output end pushes the cross rod 12 to move upward. The cross rod 12 drives the four moving frames 5 to slide along the slide groove 9 and slide rod 10 towards the inner wall of the pipe through the push-pull rod 11, so that the polishing wheel 6 is in contact with the inner wall of the pipe. Then, the servo cylinder 13 controls the polishing wheel 6 to perform sliding polishing operation on the inner wall of the pipe with appropriate pressure and frequency. During the polishing process, the four polishing wheels 6 work together to polish the inner wall of the pipe at the same time to ensure polishing accuracy. After polishing is completed, the servo cylinder 13 drives the cross rod 12 to move downward, and the moving frames 5 and polishing wheels 6 retract, making it easy to remove the polished four-way valve pipe.

[0024] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A polishing device for the inner wall of a four-way valve pipe, comprising a housing (1), characterized in that: Four anti-slip blocks (2) are fixedly installed on the lower surface of the box (1). A control switch (3) is installed on one side of the box (1). A disc (4) is fixedly installed on the upper surface of the box (1). Four movable frames (5) are movably installed on the upper surface of the disc (4). Four polishing wheels (6) are fixedly installed on the side of the four movable frames (5) that are close to each other. A limit component (7) is installed below the four polishing wheels (6). A polishing component (8) is installed inside the box (1).

2. The four-way valve pipe inner wall polishing equipment according to claim 1, characterized in that: The polishing assembly (8) includes a groove (9), and four grooves (9) are provided on the upper surface of the disc (4). The four grooves (9) are slidably connected to four movable frames (5).

3. The four-way valve pipe inner wall polishing equipment according to claim 2, characterized in that: Four slide rods (10) are fixedly installed inside the four slide grooves (9), and the four slide rods (10) are slidably connected to the four movable frames (5).

4. The four-way valve pipe inner wall polishing equipment according to claim 3, characterized in that: Four push-pull rods (11) are rotatably connected to the lower surface of the four movable frames (5), and cross rods (12) are rotatably connected to the bottom ends of the four push-pull rods (11).

5. The four-way valve pipe inner wall polishing equipment according to claim 4, characterized in that: A servo cylinder (13) is fixedly installed below the cross rod (12), and the output end of the servo cylinder (13) is fixedly connected to the cross rod (12).

6. The four-way valve pipe inner wall polishing equipment according to claim 1, characterized in that: The limiting component (7) includes a fixed plate (14), which is fixedly installed on the upper surface of the disc (4). Four limiting rods (15) are inserted and connected to the upper surface of the fixed plate (14), and several insertion holes (16) are opened on the upper surface of the fixed plate (14).

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