Method for processing a plug ring for a mud gun

Abstract

The application discloses a mud plug ring machining method for a mud gun, and the mud plug ring machining method for the mud gun comprises the following steps: blanking, rough turning of an outer circle and an inner hole to obtain a ring-shaped workpiece, and machining of an opening on the workpiece; placing a gasket at the opening, and abutting two end faces of the workpiece at the opening with two side faces of the gasket respectively, then relatively fixing the gasket and the workpiece; finishing turning of the outer circle of the workpiece, then machining one end face of the workpiece to be flat; machining the other end face of the workpiece to be flat, then finishing machining of the inner hole of the workpiece; and finally recovering. The application solves the problem that in the prior art, the outer circle of the mud plug ring is continuously worn in the use process, the outer diameter of the mud plug ring becomes smaller, the opening gap of the mud plug ring and the mud bowl cooperation gap gradually increase, and the sealing performance of the mud bowl is affected.

Description

Technical Field

[0001] This application belongs to the field of mud gun machine technology, specifically relating to a method for machining mud plug rings for mud gun machines. Background Technology

[0002] The mud gun machine in front of the blast furnace is a key piece of equipment to ensure the smooth progress of the tapping process, as it can quickly and accurately seal the taphole after tapping. The mud-pumping mechanism of the mud gun machine plays a central role, and the mud plug ring is an indispensable component of this mechanism. Through its high degree of sealing with the mud cylinder, the mud plug ring precisely pushes the taphole mud into the blast furnace, effectively achieving the taphole sealing operation.

[0003] However, because mud guns typically operate in harsh environments with high temperatures, high pressures, and dense dust, the mud plug rings produced by existing mud gun manufacturing processes lack elasticity. During use, the outer circumference of the mud plug ring is continuously worn, causing its outer diameter to decrease. This leads to a gradual increase in the gap between the mud plug ring's opening and the mating clearance with the mud cylinder. This phenomenon often causes mud backflow problems in the mud-pumping mechanism, making the mud plug ring a component that requires frequent replacement in the mud gun, thus affecting the service life and performance stability of the entire mud-pumping mechanism. Summary of the Invention

[0004] This application provides a method for processing mud plug rings for mud gun machines, which solves the problem in the prior art where the outer circle of the mud plug ring is continuously worn during use, causing its outer diameter to decrease, resulting in a gradual increase in the opening gap of the mud plug ring and the mating gap of the mud cylinder, thus affecting the sealing performance of the mud cylinder.

[0005] To achieve the above objectives, embodiments of the present invention provide a method for machining mud plug rings for mud gun machines, comprising the following steps:

[0006] The material is cut, and the outer diameter and inner hole are rough-machined to obtain an annular workpiece. An opening is then machined on the workpiece. Place a shim at the opening and make the two end faces of the workpiece at the opening abut against the two sides of the shim respectively. Then fix the shim and the workpiece relative to each other. The outer circle of the workpiece is precision machined, and then one end face of the workpiece is machined flat. The other end face of the workpiece is machined flat, and then the inner hole of the workpiece is precision machined. Finally, the opening is restored to obtain the finished mud plug ring.

[0007] In one possible implementation, after rough turning the outer diameter and inner hole to obtain the annular workpiece, the two end faces of the workpiece are machined flat, so that the thickness of the workpiece, the outer diameter of the workpiece, and the inner hole of the workpiece all have a set allowance.

[0008] In one possible implementation, after placing a gasket at the opening, the gasket is clamped using jaws, so that the two end faces of the workpiece at the opening abut against the two sides of the gasket respectively, and then the gasket and the workpiece are fixed relative to each other by welding.

[0009] In one possible implementation, restoring the opening to obtain the finished mud plug ring includes the following steps: using an angle grinder to grind the gasket ends and weld points located on both ends of the workpiece until the weld breaks off to form an opening.

[0010] In one possible implementation, after the other end face of the workpiece is machined flat, the workpiece is placed into a fixture, the workpiece is pressed down so that the machined flat end face of the workpiece and the surface of the fixture are in close contact without gap, and then the workpiece is clamped and the other end face of the workpiece is machined flat.

[0011] In one possible implementation, after placing a gasket at the opening, the gasket is clamped by a chuck so that the two end faces of the workpiece at the opening abut against the two sides of the gasket, and then the gasket and the workpiece are fixed relative to each other by a clamping mechanism. The process of restoring the opening to obtain the finished mud plug ring includes the following steps: After removing the clamping mechanism, the finished mud plug ring can be obtained.

[0012] In one possible implementation, before fixing the gasket and the workpiece relative to each other, the edges and corners of the workpiece are chamfered. After finishing the outer circle of the workpiece, the outer circle of the workpiece is made to meet the process requirements; after finishing the inner hole of the workpiece, the inner hole of the workpiece is made to meet the process requirements.

[0013] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: This invention provides a method for machining mud plug rings for mud guns. The method involves first machining the inner and outer diameters on a lathe with a certain allowance, then machining an opening on a milling and boring machine and controlling the opening size, then placing a shim and tightening the opening, and finally completing the machining of the workpiece on a lathe. Therefore, mud plug rings produced according to this invention's machining process can meet the mud-blasting performance requirements of mud guns, ensuring the expansion of the mud plug ring and its automatic wear compensation. Tests have shown that the mud plug ring of this invention has a certain degree of expansion. After the outer diameter of the mud plug ring wears, it automatically expands to ensure the fit clearance between the mud plug ring and the mud cylinder, ensuring the mud cylinder's sealing performance. This prevents mud backflow problems in the mud-blasting mechanism, thus eliminating the need for frequent mud plug ring replacements and ensuring the service life and performance stability of the entire mud-blasting mechanism. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the mud plug ring detection device provided in an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the installation of the stud and spring provided in an embodiment of the present invention.

[0017] Attached reference numerals: 1-Bearing fixing post; 2-Tightening plate; 3-Push rod; 4-Stud; 5-Nut; 6-Spring; 7-Worktable; 8-Mud plug ring; 9-Collar. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0020] The method for machining mud plug rings for mud guns provided in this invention is characterized by comprising the following steps: The material is cut, and the outer diameter and inner hole are rough-machined to obtain a ring-shaped workpiece. An opening is then machined on the workpiece. Place a shim at the opening and make the workpiece abut against the two sides of the shim at the two ends of the opening, and then fix the shim and the workpiece relative to each other. The outer diameter of the workpiece is precision machined, and then one end face of the workpiece is machined flat. The other end face of the workpiece is machined flat, and then the inner hole of the workpiece is precision machined. Finally, the opening is restored to obtain the finished mud plug ring.

[0021] It should be noted that the mud plug ring of the present invention is an open ring, and the opening size of the workpiece has a specific size in its free state. The opening of the mud plug ring needs to close to a set size under the application of a certain force, and after the applied force is removed, the opening of the mud plug ring returns to its free state size. Traditional processes machine the opening after machining the inner and outer circles, resulting in a mud plug ring that lacks elasticity and cannot compensate for wear. While directly machining a large-sized mud plug ring and shrinking its opening before installing it in the mud cylinder can achieve the function of elasticity and wear compensation, the accuracy of the outer circle and inner hole of the machined mud plug ring is difficult to guarantee. Therefore, existing methods cannot meet the requirements of this application.

[0022] This invention first processes the inner and outer diameters on a lathe, leaving a certain allowance. Then, it processes the opening on a milling and boring machine, controlling the opening size. Next, a shim is placed and the opening is tightened. Finally, the workpiece is machined on a lathe. Therefore, the mud plug ring produced according to the processing technology of this invention can meet the mud-discharging performance requirements of the mud gun, ensuring the expansion of the mud plug ring and its automatic wear compensation. Tests have shown that the mud plug ring of this invention has a certain degree of expansion. After the outer diameter of the mud plug ring wears, it will automatically expand to ensure the fit clearance between the mud plug ring and the mud cylinder, ensuring the sealing of the mud cylinder. This prevents the mud return problem in the mud-discharging mechanism, thus eliminating the need for frequent replacement of the mud plug ring and ensuring the service life and performance stability of the entire mud-discharging mechanism.

[0023] In this embodiment, after rough machining the outer circle and inner hole to obtain an annular workpiece, the two end faces of the workpiece are machined flat so that the thickness of the workpiece, the outer circle of the workpiece, and the inner hole of the workpiece all have a set allowance.

[0024] It should be noted that a certain margin is left to allow for the subsequent tightening of the opening and finishing of the mud plug ring, thereby ensuring that the mud plug ring has a certain degree of expansion.

[0025] In this first embodiment, after placing the gasket at the opening, the gasket is clamped by the jaws so that the two end faces of the workpiece at the opening abut against the two sides of the gasket respectively. Then, the gasket and the workpiece are fixed relative to each other by welding.

[0026] It should be noted that welding is a highly reliable method and facilitates subsequent precision machining.

[0027] In this first embodiment, restoring the opening to obtain the finished mud plug ring includes the following steps: using an angle grinder to grind the gasket and weld points located on the two end faces of the workpiece until the weld breaks off to form an opening.

[0028] It should be noted that after grinding the two end faces of the finished mud plug ring with an angle grinder and removing the weld points, the two ends of the opening of the workpiece will naturally separate.

[0029] In this first embodiment, after the other end face of the workpiece is machined flat, the workpiece is placed into the fixture, the workpiece is pressed down so that the machined flat end face of the workpiece and the surface of the fixture are in contact without gaps, and then the workpiece is clamped and the other end face of the workpiece is machined flat.

[0030] It should be noted that when pressing the workpiece, the workpiece can be clamped by the pressure plate; when clamping is not required, the pressure plate can be removed. By ensuring that the machined flat end face of the workpiece and the surface of the fixture are in close contact without gaps, the subsequent machining accuracy of the mud plug ring can be guaranteed.

[0031] In this second embodiment, after placing the gasket at the opening, the gasket is clamped by the jaws so that the two end faces of the workpiece at the opening abut against the two sides of the gasket respectively. Then, the clamping mechanism fixes the gasket and the workpiece relative to each other. After removing the clamping mechanism, the finished mud plug ring can be obtained.

[0032] It should be noted that using a clamping mechanism to fix the shim and the workpiece can improve the ease of operation, but it will make the operation more difficult.

[0033] In this embodiment, before fixing the gasket and the workpiece relative to each other, the edges and corners of the workpiece are chamfered. After finishing the outer circle of the workpiece, the outer circle of the workpiece is made to meet the process requirements; after finishing the inner hole of the workpiece, the inner hole of the workpiece is made to meet the process requirements.

[0034] It should be noted that the chamfer dimension is 5mm in both directions.

[0035] In this embodiment, after rough machining the outer diameter and inner hole to obtain an annular workpiece, the outer diameter of the workpiece is φ595mm, the inner hole is φ490mm, the thickness of the workpiece is greater than 50mm, the width of the opening machined on the workpiece is 20mm, and the thickness of the shim is 2mm. After finishing machining the outer diameter of the workpiece, the outer diameter of the workpiece is φ575mm; after finishing machining the inner hole of the workpiece, the inner hole of the workpiece is φ510mm, and the thickness is 40mm.

[0036] like Figure 1 and Figure 2 As shown, an embodiment of the present invention also provides a mud plug ring detection device, including a bearing fixing column 1, a tightening plate 2, a push rod 3, a stud 4, a nut 5 and a spring 6; There are two bearing fixing posts 1 on the left side of the workbench 7. Bearings are rotatably mounted on the bearing fixing posts 1. The two bearing fixing posts 1 are located on the front and rear sides of the left side of the workbench 7. A top clamping plate 2 is provided on the right side of the workbench 7. The left end of the top clamping plate 2 has a V-shaped structure. The left end of the push rod 3 is connected to the right end of the top clamping plate 2. The right end of the push rod 3 extends into the hole in the center of the left end of the stud 4. The right end of the stud 4 is screwed into the threaded hole of the nut 5 and then connected to the force-applying torsion part. The nut 5 is fixed on the workbench 7. A spring 6 is fitted on the push rod 3. The two ends of the spring 6 abut against the right end of the top clamping plate 2 and the left end of the stud 4, respectively.

[0037] It should be noted that conventional testing devices include a support, hydraulic cylinder, clamping device, and pressure sensor. During testing, the piston ring is placed in the clamping device, and the hydraulic cylinder is operated to move downwards. The clamping device closes the piston ring opening, and the pressure sensor of this device detects the piston ring spring force. Because the mud plug ring 8 of the mud gun is relatively large, this device is not suitable. Conventional testing devices use a hydraulic cylinder to apply force, thus requiring a hydraulic station. Pressure sensor detection also requires data processing equipment, resulting in a complex structure and difficulty in operation. Furthermore, during the downward application of force by the hydraulic cylinder, the piston ring experiences uneven stress, which can easily lead to stress concentration and affect the piston ring's lifespan.

[0038] A collar 9 is mounted on the left end of the stud 4, and the right end of the spring 6 abuts against the collar 9. The bearing fixing post 1 avoids stress concentration caused by the contact between the mud plug ring 8 and the bearing. The thrust is measured by the change in the length of the spring 6, thus the structure is simple and meets the application requirements of this application. The stud 4 is rotated by the force-applying torsion part, thus facilitating operation.

[0039] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a mud plug ring detection method, which uses the aforementioned mud plug ring detection device to detect mud plug rings processed by the aforementioned mud plug ring processing method for mud guns, and includes the following steps: Place the mud plug ring 8 on the workbench 7, so that the mud plug ring 8 is located between the bearing fixing post 1 and the clamping plate, and the opening of the mud plug ring 8 faces the front side of the workbench 7. By applying force to tighten the stud 4, the stud 4 drives the clamping plate to move through the push rod 3, and the mud plug ring 8 is gradually tightened by the clamping plate until the opening gap of the mud plug ring 8 reaches the set size, which is equal to the thickness of the gasket. During this process, the spring 6 is gradually compressed. Measure the inner and outer diameters of the mud plug ring 8 at this time, and calculate the thrust applied by the stud 4 based on the change in the length of the spring 6; Then loosen stud 4 and measure the gap of the mud plug ring 8 in its free state.

[0040] It should be noted that the mud plug ring 8 is only a qualified product when its inner and outer diameters, as well as the gap of its opening in the free state, all meet the process requirements.

[0041] Compared to a free-state mud plug ring 8, this method makes it easier to detect the various dimensions of the mud plug ring 8 and can also detect the elasticity of the mud plug ring 8 by measuring the change in the length of the spring 6. This method can adjust the device according to the change in the outer diameter of the mud plug ring 8 to meet the needs of various models of mud plug ring 8, thus eliminating the need to replace the detection device. The detection device has a simple structure, low manufacturing cost, and is easy to operate. This application allows for direct measurement of the inner and outer diameters of the piston ring when the opening gap of the mud plug ring 8 reaches a set size.

[0042] In this embodiment, an angle grinder is used to grind the gaskets and weld points located on the two end faces of the workpiece until the weld breaks off and forms an opening. The width of the opening formed by the weld breaking off is measured. If the width of the opening does not change, the mud plug ring 8 is a qualified product; otherwise, the mud plug ring 8 is a defective product.

[0043] It should be noted that if the width of the opening of the finished mud plug ring 8 is 20mm, the finished product is qualified; otherwise, the finished mud plug ring 8 is unqualified. If the finished mud plug ring 8 is unqualified, check the workpiece material and process steps, eliminate the problem, and reprocess it.

[0044] In this embodiment, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within the present invention.

Claims

1. A method for machining mud plug rings for a mud gun machine, characterized in that, Includes the following steps: The material is cut, and the outer diameter and inner hole are rough-machined to obtain an annular workpiece. An opening is then machined on the workpiece. Place a shim at the opening, and make the two end faces of the workpiece at the opening abut against the two sides of the shim respectively. Then fix the shim and the workpiece relative to each other. The outer circle of the workpiece is precision machined, and then one end face of the workpiece is machined flat. The other end face of the workpiece is machined flat, and then the inner hole of the workpiece is precision machined. Finally, the opening is restored to obtain the finished mud plug ring.

2. The method for machining mud plug rings for mud guns according to claim 1, characterized in that: After rough machining the outer diameter and inner hole to obtain the annular workpiece, the two end faces of the workpiece are machined flat, so that the thickness of the workpiece, the outer diameter of the workpiece, and the inner hole of the workpiece all have a set allowance.

3. The method for machining mud plug rings for mud guns according to claim 2, characterized in that: After placing the gasket at the opening, the gasket is clamped using jaws, so that the two end faces of the workpiece at the opening abut against the two sides of the gasket respectively. Then, the gasket and the workpiece are fixed relative to each other by welding.

4. The method for machining mud plug rings for a mud gun machine according to claim 3, characterized in that, The process of restoring the opening to obtain the finished mud plug ring includes the following steps: using an angle grinder to grind the gasket ends and weld points located on both ends of the workpiece until the weld breaks off and an opening is formed.

5. The method for machining mud plug rings for mud guns according to claim 3, characterized in that: After the other end face of the workpiece is machined flat, the workpiece is placed into the fixture, the workpiece is pressed down so that the machined flat end face of the workpiece and the surface of the fixture are in contact without gaps, and then the workpiece is clamped and the other end face of the workpiece is machined flat.

6. The method for machining mud plug rings for mud guns according to claim 2, characterized in that: After placing the gasket at the opening, the gasket is clamped by the jaws so that the two end faces of the workpiece at the opening abut against the two sides of the gasket respectively. Then, the gasket and the workpiece are fixed relative to each other by the clamping mechanism. The process of restoring the opening to obtain the finished mud plug ring includes the following steps: After removing the clamping mechanism, the finished mud plug ring can be obtained.

7. The method for machining mud plug rings for mud guns according to claim 4, characterized in that: Before fixing the gasket and the workpiece relative to each other, chamfer all the edges and corners of the workpiece. After finishing the outer circle of the workpiece, the outer circle of the workpiece is made to meet the process requirements; after finishing the inner hole of the workpiece, the inner hole of the workpiece is made to meet the process requirements.

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