Abrasion-cutting separated valve welding seam cutting mechanism

Abstract

A valve welding seam cutting mechanism capable of achieving abrasion-cutting separation comprises a handle, the handle is connected with an installation base used for installing a cutting component, and the installation base is provided with a clamping mechanism used for clamping a valve and a feeding main knife mechanism used for feeding and cutting a valve welding seam. The clamping mechanism is provided with a knife sharpening mechanism used for scraping valve weld joint protrusions and burrs, the two kinds of knives are designed in a separated mode, the cutting knife and the knife sharpening knife are fed independently, a knife rest is disassembled frequently when a fault occurs, feeding of each kind of knife is controlled independently, the cutting process can be controlled more accurately, and the cutting efficiency is improved. Error accumulation caused by tool switching is reduced, the working efficiency can be improved by shortening the tool changing time, the clamping mode of the mechanism adopts a four-sliding-pressing-block surrounding mode and a current clamping mode, it can be ensured that the tool stably cuts in a fixed rail plane, vertical deviation caused by vibration generated during operation is reduced, and the welding seam cutting precision is improved.

Description

[Technical Field]

[0002] This utility model relates to the field of valve maintenance technology, and in particular to a valve weld cutting mechanism that separates grinding and cutting. [Background Technology]

[0004] Valves, as media transport control equipment, are essential for the safe operation of nuclear power plants. Valve repair and replacement costs constitute a large proportion of the overall maintenance costs of a nuclear power plant. Valve maintenance involves cutting off the original sealing lip weld, opening the valve, and inspecting the valve core, stem, and sealing surface. If damage is found, the relevant components are replaced. After the work is completed, the valve needs to be reassembled by re-welding the upper and lower parts to form a new sealing lip weld, restoring it to its original state. Although automatic valve cutting mechanisms exist in existing technology, the confined spaces of some valves in nuclear power plants make these mechanisms difficult to use, requiring manual cutting. In existing manual cutting mechanisms, the feed cutting tool and grinding tool are mounted on the same tool holder. If the feed of the feed cutting tool is too large, it can cause the feed tool to jam, or if the feed of the grinding tool is too large, it can cause the grinding tool to jam. This necessitates frequent disassembly of the tool holder, resulting in long cutting times and affecting cutting quality. [Utility Model Content]

[0006] To overcome the problem of frequent tool holder disassembly and prolonged cutting time caused by malfunctions when the feed cutting tool and grinding tool are mounted on the same tool holder, this utility model aims to provide a valve weld cutting mechanism with separate grinding and cutting mechanisms. This utility model is achieved through the following technical solution:

[0007] A valve weld seam cutting mechanism with grinding and cutting separation includes a handle, a mounting base for mounting cutting components connected to the handle, a clamping mechanism for clamping the valve and a feeding main blade mechanism for feeding and cutting the valve weld seam.

[0008] As described above, a valve weld cutting mechanism for grinding and cutting separation includes a grinding mechanism on the clamping mechanism for scraping down the protrusions and burrs of the valve weld.

[0009] As described above, a valve weld cutting mechanism for grinding and cutting separation includes a main blade for cutting valve welds, which is mounted on a mounting base and can slide relative to the mounting base, and a main blade screw for advancing the main blade.

[0010] As described above, a valve weld cutting mechanism for grinding and separating is provided with a main blade groove for loading the main blade and allowing the main blade to slide relative to the main blade on the mounting base, and a first mounting hole for connecting the main blade screw.

[0011] As described above, in a valve weld cutting mechanism for grinding and separation, the main blade is provided with a first threaded hole, which is connected to a first thread on the main blade screw. The rotation of the first thread drives the main blade to move forward or backward.

[0012] As described above, a valve weld cutting mechanism for grinding and cutting separation includes a clamping module for pressing the valve weld and a pushing clamping mechanism for moving the clamping module toward the valve weld to clamp the valve weld.

[0013] As described above, a valve weld cutting mechanism for grinding and cutting separation includes a guide rail mounted on a mounting base for guiding the movement of the valve weld. A clamping arm fixed on the mounting base is provided on one side of the guide rail. A sliding block is provided on the guide rail that is connected to the mounting base and can slide on the guide rail to clamp the valve weld together with the clamping arm. A pushing mechanism is provided on the mounting base to push the sliding block.

[0014] As described above, in a valve weld seam cutting mechanism for grinding and separation, the push slider, clamping arm, and mounting base together form an opening groove with an opening on one side and the width of the opening can be changed. The clamping module includes a first pressing pulley group disposed on the clamping arm and a second pressing pulley group disposed on the push slider. The first pressing pulley group includes a first pressing pulley near the opening of the opening groove and a second pressing pulley away from the opening of the opening groove. The second pressing pulley group includes a third pressing pulley near the opening of the opening groove and a fourth pressing pulley away from the opening of the opening groove. The second pressing pulley group on the push slider is pushed to move towards the first pressing pulley group to clamp the valve.

[0015] As described above, a valve weld cutting mechanism for grinding and cutting separation includes a grinding tool for trimming the valve weld, which is mounted on a clamping mechanism and can slide relative to the clamping mechanism, and a grinding screw for advancing the grinding tool.

[0016] As described above, a valve weld cutting mechanism for grinding and cutting separation includes a grinding groove on the clamping mechanism for loading a grinding blade and allowing the grinding blade to slide relative to it on the clamping mechanism, and a second mounting hole for connecting a grinding blade screw. The grinding blade is provided with a second threaded hole that engages with a second thread on the grinding blade screw. The rotation of the second thread drives the grinding blade to move forward or backward.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This mechanism features a separate design for the two types of cutting tools, with the cutting tool and the grinding tool fed independently. In case of malfunction, the tool holder can be frequently disassembled, and the feed of each tool can be controlled independently. This allows for more precise control of the cutting process, reduces the accumulation of errors caused by tool switching, and improves work efficiency by reducing tool change time.

[0019] 2. The clamping mode of this mechanism adopts a four-sliding block ring-type clamping method. The current clamping method can ensure that the tool cuts stably within the fixed track plane, reduce vertical displacement caused by vibration during operation, and improve the cutting accuracy of weld seams.

[0020] 3. The original tool feed screw was embedded in the machine body and required the use of tools such as wrenches for operation. In this solution, the tool feed screw is lengthened and has an external knob for direct manual operation, which is more convenient. [Attached Image Description]

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 This is a three-dimensional schematic diagram of a valve weld seam cutting mechanism for grinding and cutting separation according to the present invention. Figure 1 ;

[0024] Figure 2 This is an exploded view of a valve weld seam cutting mechanism with grinding and cutting separation according to the present invention. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of a valve weld seam cutting mechanism mounting base for grinding and separating according to this utility model. Figure 3 ;

[0026] Figure 4 This is a schematic diagram of the push slider of a valve weld seam cutting mechanism for grinding and separating according to this utility model. Figure 4 ;

[0027] Figure 5 This is a schematic diagram of the feed main blade mechanism of a valve weld seam cutting mechanism for grinding and cutting separation according to this utility model. Figure 5 ;

[0028] Figure 6 This is a schematic diagram of the grinding mechanism of a valve weld seam cutting mechanism with grinding and cutting separation according to this utility model. Figure 6 ;

[0029] Figure 7 This is an exploded view of the feed main blade mechanism of a valve weld seam cutting mechanism with grinding and cutting separation according to the present invention. Figure 7 ;

[0030] Figure 8This is an exploded view of the grinding mechanism of a valve weld seam cutting mechanism with grinding and cutting separation according to this utility model. Figure 8 ;

[0031] Figure 9 This is a schematic diagram of a valve weld seam cutting mechanism mounting base for grinding and separating according to this utility model. Figure 9 ;

[0032] Figure 10 This is a schematic diagram of the push slider of a valve weld seam cutting mechanism for grinding and separating according to this utility model. Figure 10 .

Detailed Implementation Methods

[0034] To make the technical problems solved by this application, the technical solutions, and the beneficial effects clearer, this application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0035] Please see Figures 1 to 10 A valve weld seam cutting mechanism with grinding and cutting separation includes a handle 1 for convenient manual rotation to cut the valve weld seam. A mounting base 2 for mounting cutting components is connected to the handle 1. The mounting base 2 is equipped with a clamping mechanism 3 for clamping the valve to make the weld seam cutting more precise, and a feeding main blade mechanism 4 for feeding the valve weld seam. The clamping mechanism 3 is equipped with a grinding mechanism 5 for scraping off weld seam protrusions and burrs. The clamping mechanism 3 ensures the stability and positioning accuracy of the valve during the cutting process, thereby improving the precision of the weld seam cutting. The clamping mechanism 3 can prevent the valve from moving due to vibration or external force during the cutting process. The grinding mechanism 5 can immediately process the weld seam protrusions and burrs left after cutting, ensuring the flatness of the valve surface and reducing the need for subsequent grinding and finishing.

[0036] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the clamping mechanism 3 includes a clamping module 31 for pressing the valve weld and a pushing clamping mechanism 32 for moving the clamping module 31 toward the valve weld to clamp the valve weld. The clamping module 31 acts directly on the valve weld, while the pushing clamping mechanism 32 provides the necessary pushing force and precise positioning control. The two work together to ensure the stability and safety of the valve weld during the processing.

[0037] Furthermore, as a preferred embodiment of this solution and not a limitation, the propulsion clamping mechanism 32 includes a guide rail 21 disposed on the mounting base 2 for guiding the propulsion clamping mechanism 32 to move. A clamping arm 26 fixed on the mounting base 2 is provided on one side of the guide rail 21. It also includes a propulsion slider 321 that can slide on the mounting base 2 via the guide rail 21 and is connected to the mounting base 2 in cooperation. The propulsion slider 321 is connected to a pushing mechanism 322 for adjusting the moving position of the propulsion slider 321. The propulsion slider 321 and the clamping arm 26 can be adjusted by the distance of the pushing mechanism 322 to jointly clamp the valve weld. The pushing mechanism 322 includes a... A threaded hole 3223 is provided, which is connected to a threaded thread 3222. This allows the sliding block 321 to move along the guide rail when the threaded thread 3222 rotates. The threaded thread 3222 is connected to a sliding adjustment housing 3221 that limits the wobbling of the threaded thread 3222. The mechanical linkage of the entire clamping mechanism 3 achieves precise clamping of the valve weld. The pushing mechanism 322 controls the movement of the sliding block 321 by rotating the threaded thread 3222, thereby adjusting the distance between the clamping arm 26 and the sliding block 321 to accommodate valve welds of various sizes, ensuring a stable and reliable clamping effect under various conditions. This design not only improves the accuracy and efficiency of the welding or inspection process but also greatly enhances operational safety.

[0038] Furthermore, as a preferred embodiment of this solution and not a limitation, the push slider 321, the clamping arm 26, and the mounting base 2 together form an opening groove 310 with an opening on one side and an adjustable opening width. The clamping module 31 includes a first pressing pulley group 3100 disposed on the clamping arm 26 and a second pressing pulley group 3200 disposed on the push slider 321. The first pressing pulley group 3100 includes a first pressing pulley 311 near the opening of the opening groove 310 and a second pressing pulley 320 away from the opening of the opening groove 310. 12. The second pressing pulley assembly 3200 includes a third pressing pulley 313 near the opening of the opening groove 310 and a fourth pressing pulley 314 away from the opening of the opening groove 310. The second pressing pulley assembly 3200 on the push slider 321 is pushed towards the first pressing pulley assembly 3100 to clamp the valve. Through the coordinated action of the four pressing pulleys, the valve can remain stable during processing or inspection, achieving uniform pressure distribution even with various valve shapes and sizes, reducing cutting errors, and improving cutting quality and efficiency. Furthermore, the adjustability of the pressing pulleys allows this clamping module to adapt to valves of various sizes and shapes.

[0039] Furthermore, as a preferred embodiment of this solution and not a limitation, the feed main cutter mechanism 4 includes a main cutter 41 for cutting valve welds, mounted on the mounting base 2 and capable of sliding relative to the mounting base 2, and a main cutter screw 42 for advancing the main cutter 41. The mounting base 2 is provided with a main cutter groove 22 for loading the main cutter 41 and allowing the main cutter 41 to slide relative to the mounting base 2, and a first mounting hole 23 for connecting the main cutter screw 42. The main cutter 41 is provided with a first threaded hole 411, which is engaged with a first thread 421 on the main cutter screw 42. The rotation of the first thread 421 drives the main cutter 41 forward. The main cutter screw 42 and the main cutter 41 are connected by threads. When the main cutter screw 42 rotates, the interaction of the threads can precisely control the forward or backward movement of the main cutter 41 to achieve the cutting action. The main cutter 41 is installed in the main cutter groove 22, which allows the main cutter 41 to slide on the mounting base 2, ensuring the smoothness and stability of the cutting action. When the main cutter screw 42 rotates, the interaction between the first thread 421 and the first threaded hole 411 causes the main cutter 41 to move along the direction of the main cutter groove 22. By controlling the rotation direction and speed of the main cutter screw 42, the cutting depth and speed of the main cutter 41 can be precisely controlled, thereby achieving precise cutting of the valve weld.

[0040] Furthermore, as a preferred embodiment of this solution and not a limitation, the grinding mechanism 5 includes a grinding blade 51 for trimming valve welds, mounted on a clamping mechanism 3 and capable of sliding relative to the clamping mechanism 3, and a grinding screw 52 for advancing the grinding blade 51. The clamping mechanism 3 is provided with a grinding groove 39 for loading the grinding blade 51 and allowing the grinding blade 51 to slide relative to the clamping mechanism 3, and a second mounting hole 37 for connecting the grinding screw 52. The grinding blade 51 is provided with a second threaded hole 511 that mates with a second thread 521 on the grinding screw 52. The rotation of the second thread 521 drives the grinding blade 51 to move forward or backward. The grinding blade can directly trim the weld, removing protrusions and burrs from the weld surface, ensuring a smooth valve surface. By rotating the grinding screw, the advancing distance and pressure of the grinding blade can be precisely controlled, achieving adaptation to welds of different thicknesses and hardnesses, and improving the flexibility and accuracy of trimming.

[0041] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the mounting base 2 is provided with a protective shell 29 to prevent dust from entering and to protect the internal mechanism so that it can work normally. The design of the protective shell 29 can effectively block external dust and moisture, keep the internal mechanism clean and dry. The protective shell 29 can not only prevent external pollutants from entering, but also resist external impacts to a certain extent and protect the internal mechanical parts from damage.

[0042] The working principle of this embodiment is as follows:

[0043] The process of using a valve weld seam cutting mechanism that separates grinding and cutting, such as... Figure 1 As shown, first, the fixed first and second pressing pulleys are placed against the lip of the valve weld to be cut. The feed screw is rotated, causing the feed slider to move forward until the moving third and fourth pressing pulleys are also in close contact with the lip of the valve weld. Each sliding block makes two point contacts with the valve, resulting in eight point contacts for the four sliding blocks. The feed main blade mechanism brings the cutting tool into contact with the lip of the valve weld. During the feed process, considering the different thicknesses of the valve weld and the possibility of local protrusions, the tool setting distance should be observed visually first. When the tool is about to contact the weld, the handle is rotated to perform a test cut. After one test cut, if the tool does not contact the weld, the feed is continued. This cycle is repeated until the tool scrapes against any point on the weld, indicating that the tool setting is complete. After the tool setting is complete, the operating handle can be rotated to start cutting. The grinding mechanism brings the tool into contact with the lip of the valve weld, creating a smooth surface for subsequent cutting. The handle is rotated, and every 2-3 cuts, the feed main blade mechanism feeds synchronously by 2-3 mm. This cycle is repeated until the cutting is complete.

[0044] The above are implementation methods provided in conjunction with specific content, and it is not intended that the specific implementation of this application is limited to these descriptions. Any methods or structures that are similar to those of this application, or any technical deductions or substitutions made based on the concept of this application, should be considered within the scope of protection of this application.

Claims

1. A valve weld cutting mechanism for abrasive cutting separation, characterized by, The utility model provides a cutting device for valve welding seam, which comprises a handle (1), a mounting seat (2) for mounting a cutting component is connected to the handle (1), a clamping mechanism (3) for clamping a valve welding seam and a feeding main tool mechanism (4) for feeding the cutting valve welding seam are arranged on the mounting seat (2). The feeding main tool mechanism (4) comprises a main tool (41) for cutting the valve welding seam and a main tool screw rod (42) for advancing the main tool (41) to cut, which are arranged on the mounting seat (2) and can slide relative to the mounting seat (2). The clamping mechanism (3) comprises a clamping module (31) for pressing the valve welding seam and a pushing clamping mechanism (32) for advancing the clamping module (31) to move to clamp the valve welding seam.

2. A valve weld cutting mechanism for abrasive cutting separation as defined in claim 1, wherein The clamping mechanism (3) is provided with a grinding mechanism (5) for scraping the protrusions and burrs of the valve welding seam.

3. A valve weld cutting mechanism for abrasive cutting separation as defined in claim 1, wherein The mounting seat (2) is provided with a main tool groove (22) for loading the main tool (41) and enabling the main tool (41) to slide relative to the mounting seat (2) and a first mounting hole (23) for connecting the main tool screw rod (42).

4. A valve weld cutting mechanism for abrasive cutting and separation as defined in claim 1, wherein The main tool (41) is provided with a first threaded hole (411) matched with a first thread (421) on the main tool screw rod (42), and the first thread (421) rotates to drive the main tool (41) to move forward or backward.

5. A valve weld cutting mechanism for abrasive cutting separation as defined in claim 1, wherein The pushing clamping mechanism (32) comprises a guide rail (21) arranged on the mounting seat (2) for guiding the movement of the pushing clamping mechanism (32), one side of the guide rail (21) is provided with a clamping arm (26) fixed on the mounting seat (2), the guide rail (21) is provided with a pushing sliding block (321) matched with the mounting seat (2) and capable of sliding on the guide rail (21) and used for clamping the valve welding seam together with the clamping arm (26), and the mounting seat (2) is provided with a pushing mechanism (322) for pushing the pushing sliding block (321) to move.

6. A valve weld cutting mechanism for abrasive cutting separation as defined in claim 5, wherein The pushing sliding block (321), the clamping arm (26) and the mounting seat (2) jointly form an open groove (310) with one side open and capable of changing the opening width, the clamping module (31) comprises a first pressing pulley set (3100) arranged on the clamping arm (26) and a second pressing pulley set (3200) arranged on the pushing sliding block (321), the first pressing pulley set (3100) comprises a first pressing pulley (311) close to the opening of the open groove (310) and a second pressing pulley (312) away from the opening of the open groove (310), and the second pressing pulley set (3200) comprises a third pressing pulley (313) close to the opening of the open groove (310) and a fourth pressing pulley (314) away from the opening of the open groove (310), the second pressing pulley set (3200) on the pushing sliding block (321) is moved to the first pressing pulley set (3100) to clamp the valve.

7. A valve weld cutting mechanism for abrasive cutting and separation as defined in claim 2, wherein The grinding mechanism (5) comprises a grinding wheel (51) arranged on the clamping mechanism (3) and capable of sliding relative to the clamping mechanism (3) for trimming the valve weld, and a grinding wheel screw rod (52) for advancing the grinding wheel (51).

8. A valve weld cutting mechanism for abrasive cutting separation as defined in claim 7, wherein The clamping mechanism (3) is provided with a grinding wheel slot (39) for loading the grinding wheel (51) and enabling the grinding wheel (51) to slide relative to the clamping mechanism (3), and a second mounting hole (37) for connecting the grinding wheel screw rod (52), the grinding wheel (51) is provided with a second threaded hole (511) matched with a second thread (521) provided on the grinding wheel screw rod (52), and the second thread (521) rotates to drive the grinding wheel (51) to move forward or backward.

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