Cutting device for valve accessory production
By using a dual-mode expansion mechanism and limiting components driven by electrorheological fluid, the problem of unstable pipe fixing in traditional cutting processes is solved, enabling adaptive fixing and precision cutting of different pipe diameters, thus improving the stability and efficiency of the cutting device.
Patent Information
- Application Number
- CN202520736427.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-04-18
AI Technical Summary
Traditional cutting processes are difficult to adapt to pipes with different outer diameters and wall thicknesses, which can cause the pipes to move or shift during clamping, affecting the quality of the cut and the reliability of subsequent welding and sealing, and increasing the defect rate.
A dual-mode expansion mechanism driven by electrorheological fluid is adopted, which combines a circular expansion bladder and a convex expansion bladder to compress and fix the outer and inner walls of the pipe. By utilizing the expansion and compression characteristics of ER fluid under an electric field, and with the help of a four-dimensional adjustable limit component and a pressure sensor, adaptive pipe diameter adjustment and stable cutting can be achieved.
It improves cutting stability and pipe fixing efficiency, ensures cut quality, and is especially suitable for precision machining of large-diameter thin-walled pipes, increasing fixing efficiency by more than 3 times.
Smart Images
Figure CN223834037U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve fitting production technology, specifically a cutting device for valve fitting production. Background Technology
[0002] As a key component of fluid control equipment, valves play a crucial role in pipeline systems by regulating the flow rate, direction, pressure, and temperature of the medium. Their matching pipes require precision machining to achieve a reliable connection. However, traditional cutting processes have significant drawbacks when processing pipes of various specifications: the use of universal clamping devices makes it difficult to adapt to pipes with different outer diameters and wall thicknesses, leading to insufficient matching during clamping and causing axial movement or radial displacement of the pipe. This unstable fixing method not only increases the radial runout of the cutting edge but also causes wavy deviations on the pipe cut end face, severely reducing the sealing reliability of subsequent welding assembly. Statistics show that such process defects account for approximately 18%-23% of all pipeline installation problems, becoming a key bottleneck restricting the overall quality of valve systems. While existing technologies may already offer solutions to these problems, this paper aims to provide an alternative or replacement technical solution. Utility Model Content
[0003] To achieve the above objectives, this utility model provides the following technical solution: a cutting device for valve fitting production, comprising: a processing table, a processing support, a cutter, and a movable limiting structure. The processing support is mounted on the processing table, the cutter is mounted on the processing support, and the movable limiting structure is mounted on both the processing support and the processing table. The movable limiting structure includes: a pair of movable adjustment components, an electrorheological tank, a diversion valve, a bidirectional drainage pump, two pairs of drainage shafts, two pairs of L-shaped drainage pipes, two pairs of sealing sleeves, an electrorheological hardener, a pair of annular expansion bladders, and a pair of convex expansion bladders.
[0004] A pair of the aforementioned movable adjustment components are mounted on the processing table and the processing support. The electrorheological fluid tank is mounted on the processing support. The bidirectional drainage pump is mounted on the electrorheological fluid tank. The diversion valve is mounted on the bidirectional drainage pump. Two pairs of drainage shaft tubes are mounted on the processing support, and the two pairs of drainage shaft tubes are connected to the bidirectional drainage pump through flexible pipes. Two pairs of L-shaped drainage tubes are respectively movably inserted into the inner side of the two pairs of drainage shaft tubes. Two pairs of sealing sleeves are connected to the two pairs of drainage shaft tubes and the two pairs of L-shaped drainage tubes. The electrorheological fluid transducer is mounted on the diversion valve. A pair of annular expansion bladders are mounted on the processing table. A pair of convex expansion bladders are mounted on a pair of the aforementioned movable adjustment components. The pair of annular expansion bladders are connected to the diversion valve through flexible pipes. The pair of convex expansion bladders are connected to the two pairs of L-shaped drainage tubes.
[0005] It should be noted that, as described above, the operation of the processing support and the movable adjustment components on the processing table drives the convex expansion bladder, the fitted ring, and the fitted compression bladder on it. Through the operation of the bidirectional drainage pump, the liquid inside the electrorheological fluid tank is diverted to the diversion valve. The diversion valve then diverts the liquid to the inside of two pairs of drainage shafts and a pair of ring expansion bladders. Thus, the pair of ring expansion bladders compress and fix the two sides of the pipe cut. The movable adjustment components drive the convex expansion bladder, inserting it into the inside of the pipe. By pumping liquid from the convex expansion bladder, it expands, thereby achieving expansion, compression, and fixation of the inside of the pipe. Electrorheological fluids (ER fluids) produce a significant expansion and compression effect after being energized. The magnitude of this effect is influenced by a combination of factors. The magnitude of the expansion and compression after being energized is the result of the combined effect of factors such as electric field strength, particle volume fraction, and liquid viscosity. Under typical experimental conditions (e.g., 540 V / mm, particle volume fraction 28%), the compressive stress can reach 800 kPa and the shear yield stress can reach 120 kPa, thereby achieving internal expansion and compression fixation. Similarly, by expanding a pair of fitted compression bladders, the two sides of the pipe are expanded and compressed both internally and externally, while the cut is also compressed and fixed.
[0006] Preferably, the movable adjustment assembly includes: two pairs of horizontal telescopic lead screw modules, a pair of lifting limit loop blocks, a pair of lifting lead screw modules, and a convex extrusion block;
[0007] Two pairs of horizontal telescopic screw modules are installed in parallel on the processing bracket and the processing table. A pair of lifting limit loop blocks are respectively installed on the moving ends of the two pairs of horizontal telescopic screw modules. A pair of lifting screw modules are installed between the pair of lifting limit loop blocks. A convex extrusion block is installed on the moving ends of the pair of lifting screw modules. A pair of convex expansion fluid bladders are respectively installed on the pair of convex extrusion blocks.
[0008] It should be noted that, as described above, the operation of two pairs of horizontal telescopic screw modules drives a pair of lifting limit ring blocks to move steadily up and down. The operation of the lifting screw modules inside the pair of lifting limit blocks drives a pair of lifting limit ring blocks to move relatively forward and backward. The pair of lifting limit ring blocks drives a pair of lifting screw modules to move steadily horizontally forward and backward. The pair of lifting screw modules drive convex extrusion blocks on their respective sides, allowing the expansion of the convex extrusion blocks to be adjusted according to the cutting position and size of the pipe. The convex extrusion blocks drive the convex expansion bladders on their sides to move relatively forward and backward, thus inserting the convex expansion bladders into the inside of the pipe. At the same time, the convex expansion bladders drive the mounting rings on their sides, which in turn drive the mounting extrusion bladders on their sides. The mounting extrusion bladders then compress and compress the pipe on both sides and the inside, thereby squeezing and fixing the pipe.
[0009] Preferably, a set ring is provided on each of the pair of convex expansion bladders, and a set compression bladder is provided on each of the pair of set rings.
[0010] Preferably, the processing support is equipped with a pair of scanning cameras.
[0011] Preferably, pressure sensors are provided on the inner sides of the pair of said compression bladders, the pair of said annular expansion bladders, and the pair of said convex expansion bladders.
[0012] Preferably, multiple flow sensors are provided on the inner side of the diversion valve. Beneficial effects
[0013] This utility model provides a cutting device for valve fitting production. Compared with existing technologies, this valve fitting cutting device employs a dual-mode expansion mechanism driven by electrorheological fluid. The annular and convex expansion bladders act on the outer and inner walls of the pipe, respectively. Utilizing the characteristic of ER fluid generating 800kPa extrusive stress under a 540V / mm electric field, a combined internal and external clamping force is formed, ensuring cutting stability. A four-dimensional adjustable limiting component integrates a horizontal telescopic screw module and a lifting screw module. Through dual-loop screw transmission, the XYZ three-axis positioning of the convex extrusion block is achieved. Combined with closed-loop control using a pressure sensor, it can adapt to pipe diameter changes from φ20-200mm. The unique set-type extrusion system is simultaneously activated during bladder expansion, generating 0.02mm-level deformation compensation through 16 sets of annular array micro-pressure chambers, improving the stress distribution uniformity at pipe fixing points by 40%, making it particularly suitable for precision machining of large-diameter, thin-walled pipe fittings. This system, through electro-hydraulic-mechanical coupling control, improves the fixing efficiency of traditional mechanical clamping by more than three times. Attached Figure Description
[0014] Figure 1 This is a front sectional view of a cutting device for manufacturing valve fittings according to the present invention.
[0015] Figure 2 This is a side sectional view of a cutting device for manufacturing valve fittings according to the present invention.
[0016] Figure 3 for Figure 1 A magnified view of the letter "A" in the image.
[0017] In the diagram: 1. Processing table; 2. Processing support; 3. Cutter; 4. Electrochemical fluid tank; 5. Diverter valve; 6. Bidirectional drainage pump; 7. Drainage shaft tube; 8. L-shaped drainage tube; 9. Circular expansion bladder; 10. Convex expansion bladder; 11. Horizontal telescopic screw module; 12. Lifting limit retaining block; 13. Lifting screw module; 14. Convex extrusion block; 15. Set ring; 16. Set extrusion bladder. Detailed Implementation
[0018] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0019] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further. Example
[0020] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-3As shown, the processing bracket 2 is mounted on the processing table 1, the cutter 3 is mounted on the processing bracket 2, and the movable limiting structure is mounted on both the processing bracket 2 and the processing table 1. The movable limiting structure includes: a pair of movable adjustment components, an electrorheological fluid tank 4, a diversion valve 5, a bidirectional drainage pump 6, two pairs of drainage shaft tubes 7, two pairs of L-shaped drainage tubes 8, two pairs of sealing sleeves, an electrorheological hardener, a pair of annular expansion bladders 9, and a pair of convex expansion bladders 10; a pair of the movable adjustment components are mounted on both the processing table 1 and the processing bracket 2, and the electrorheological fluid tank 4 is mounted on the processing bracket 2. A bidirectional drainage pump 6 is mounted on the electrorheological fluid tank 4, a diversion valve 5 is mounted on the bidirectional drainage pump 6, two pairs of drainage shaft tubes 7 are mounted on the processing bracket 2, and the two pairs of drainage shaft tubes 7 are connected to the bidirectional drainage pump 6 through flexible pipes, two pairs of L-shaped drainage tubes 8 are respectively movably inserted into the inner side of the two pairs of drainage shaft tubes 7, two pairs of sealing sleeves are connected to the two pairs of drainage shaft tubes 7 and the two pairs of L-shaped drainage tubes 8, the electrorheological fluid transducer is mounted on the diversion valve 5, a pair of annular expansion bladders 9 are mounted on the processing table 1, and a pair of convex expansion bladders 10 are mounted on a pair of moving... On the moving adjustment assembly, a pair of annular expansion bladders 9 are connected to the diversion valve 5 via flexible pipes, and a pair of convex expansion bladders 10 are connected to two pairs of L-shaped drain pipes 8. The moving adjustment assembly includes: two pairs of horizontal telescopic screw modules 11, a pair of lifting limit loop blocks 12, a pair of lifting screw modules 13, and convex extrusion blocks 14. The two pairs of horizontal telescopic screw modules 11 are installed in parallel on the processing bracket 2 and the processing table 1, the pair of lifting limit loop blocks 12 are respectively installed on the moving ends of the two pairs of horizontal telescopic screw modules 11, and the pair of lifting screw modules 13 are installed on a pair of... Between the lifting limit ring blocks 12, the convex extrusion block 14 is installed on the moving end of the pair of lifting screw modules 13, and the pair of convex expansion bladders 10 are respectively installed on the pair of convex extrusion blocks 14; each of the pair of convex expansion bladders 10 is provided with a fitted ring 15, and each of the pair of fitted rings 15 is provided with a fitted extrusion bladder 16; a pair of scanning cameras are provided on the processing bracket 2; pressure sensors are provided on the inner sides of the pair of fitted extrusion bladders 16, the pair of ring expansion bladders 9, and the pair of convex expansion bladders 10; multiple flow sensors are provided on the inner side of the diversion valve 5.
[0021] According to the appendix Figure 1-3It is concluded that, through the operation of the moving adjustment components on the processing support 2 and the processing table 1, the convex expansion bladder 10, the fitted ring 15, and the fitted compression bladder 16 on them are driven. Through the operation of the bidirectional drainage pump 6, the liquid inside the electrorheological fluid tank 4 is diverted to the diversion valve 5. The diversion valve 5 then diverts the liquid to the inner sides of the two pairs of drainage shaft pipes 7 and the pair of ring expansion bladders 9. The pair of ring expansion bladders 9 then compress and fix the two sides of the pipe cutting point. The moving adjustment components drive the convex expansion bladder 10, inserting it into the inner side of the pipe. By pumping liquid from the convex expansion bladder 10, it expands, thus achieving expansion, compression, and fixation of the inner side of the pipe. Electrorheological fluid... Fluids (ER fluids) exhibit a significant expansion and compression effect upon energization. The magnitude of this expansion and compression is influenced by a combination of factors, including electric field strength, particle volume fraction, and liquid viscosity. Under typical experimental conditions (e.g., 540 V / mm, 28% particle volume fraction), the compression stress can reach 800 kPa, and the shear yield stress can reach 120 kPa, achieving internal expansion and compression fixation. Similarly, the expansion of a pair of fitted compression bladders 16 achieves internal and external expansion and compression fixation on both sides of the pipe, while also compressing and fixing the cut edges. The operation of two pairs of horizontal telescopic screw modules 11 drives a pair of lifting limit ring blocks 12 for stable lifting and lowering. The operation of the lifting screw module 13 inside the pair of lifting limit blocks drives the pair of lifting limit ring blocks 12 for relative extension and retraction. The pair of lifting limit ring blocks 12 then drive the pair of lifting screw modules 13 for stable horizontal extension and retraction. Each of the convex extrusion blocks 14 is driven to expand according to the cutting position and size of the pipe. The expansion of the convex extrusion blocks 14 is adjusted according to the cutting position and size of the pipe. The convex extrusion blocks 14 drive the convex expansion bladders 10 to expand and contract relative to each other, so that the convex expansion bladders 10 are first inserted into the inside of the pipe. At the same time, the convex expansion bladders 10 drive the sleeve ring 15 on it, and the sleeve ring 15 drives the sleeve extrusion bladder 16 on it. The sleeve extrusion bladder 16 squeezes and compresses the two sides and the inside of the pipe to compress and fix the pipe.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A cutting device for valve fitting production, comprising: A processing table, a processing support, a cutter, and a movable limiting structure are provided. The processing support is mounted on the processing table, the cutter is mounted on the processing support, and the movable limiting structure is mounted on both the processing support and the processing table. The movable limiting structure comprises: a pair of movable adjustment components, an electrorheological tank, a diversion valve, a bidirectional drainage pump, two pairs of drainage shafts, two pairs of L-shaped drainage pipes, two pairs of sealing sleeves, an electrorheological hardener, a pair of annular expansion bladders, and a pair of convex expansion bladders. A pair of movable adjustment components are mounted on the processing table and the processing support. The electrorheological fluid tank is mounted on the processing support. The bidirectional drainage pump is mounted on the electrorheological fluid tank. The diversion valve is mounted on the bidirectional drainage pump. Two pairs of drainage shaft tubes are mounted on the processing support, and the two pairs of drainage shaft tubes are connected to the bidirectional drainage pump through flexible pipes. Two pairs of L-shaped drainage tubes are respectively movably inserted into the inner side of the two pairs of drainage shaft tubes. Two pairs of sealing sleeves are connected to the two pairs of drainage shaft tubes and the two pairs of L-shaped drainage tubes. The electrorheological fluid transducer is mounted on the diversion valve. A pair of annular expansion bladders are mounted on the processing table. A pair of convex expansion bladders are mounted on a pair of movable adjustment components. The pair of annular expansion bladders are connected to the diversion valve through flexible pipes. The pair of convex expansion bladders are connected to the two pairs of L-shaped drainage tubes.
2. The cutting device for valve fitting production according to claim 1, characterized in that, The movable adjustment assembly includes: two pairs of horizontal telescopic lead screw modules, a pair of lifting limit loop blocks, a pair of lifting lead screw modules, and a convex extrusion block. Two pairs of horizontal telescopic lead screw modules are installed in parallel on the processing bracket and the processing table. A pair of lifting limit ring blocks are respectively installed on the moving ends of the two pairs of horizontal telescopic lead screw modules. A pair of lifting lead screw modules are installed between the pair of lifting limit ring blocks. A convex extrusion block is installed on the moving ends of the pair of lifting lead screw modules. A pair of convex expansion liquid bladders are respectively installed on the pair of convex extrusion blocks.
3. The cutting device for valve fitting production according to claim 2, characterized in that, Each of the pair of convex expansion bladders is provided with a fitting ring, and each of the pair of fitting rings is provided with a fitting compression bladder.
4. The cutting device for valve fitting production according to claim 3, characterized in that, The processing support is equipped with a pair of scanning cameras.
5. A cutting device for valve fitting production according to claim 4, characterized in that, Pressure sensors are provided on the inner sides of the pair of said compression bladders, the pair of said annular expansion bladders, and the pair of said convex expansion bladders.
6. A cutting device for valve fitting production according to claim 5, characterized in that, Multiple flow sensors are installed on the inner side of the diversion valve.