Welding equipment for mine grinding machine lining plate production

Abstract

The invention relates to the related technical field of welding equipment, discloses welding equipment for mine grinding machine lining plate production, and aims to solve the problems that during lining plate welding, a welding seam is exposed and a lining plate is not easy to position, a positioning groove formed in the middle of a mother lining plate is used for enabling a welding assembly to conduct welding along the inner side of the mother lining plate, and the welding seam is formed in the inner side of the mother lining plate; afterwards, the positioning lining plates on the secondary lining plates are placed in the positioning grooves in the primary lining plates, on one hand, the welding seams on the primary lining plates are hidden in the primary lining plates according to shielding and covering of the positioning lining plates, and therefore the primary lining plates cannot make direct contact with ore in the grinding cylinder; and on the other hand, according to the fact that the positioning lining plates are clamped into the positioning grooves and the sub lining plates are positioned, then the welding assembly conducts welding along the inner sides of the positioning grooves formed in the sub lining plates, after welding is completed, the next positioning lining plate abuts against the positioning grooves of the sub lining plates, and the effects of hiding the interior of the welding seam and self-positioning of the sub lining plates and the main lining plates are finally achieved through sequential circulation.

Description

Technical Field

[0001] This invention relates to the technical field of welding equipment, and in particular to a welding equipment for producing liners for mining grinding mills. Background Technology

[0002] In the complex process of mineral processing, the mining grinding mill plays a crucial role, serving as a core piece of equipment for refining ore. Its working principle utilizes steel balls as the grinding media. As the cylinder rotates, the steel balls continuously tumble and collide within the cylinder, generating powerful impact, compression, and abrasive forces to gradually break down the initially larger ore particles until they reach the appropriate particle size required for subsequent processing.

[0003] Among the many components of a mining grinding mill, the installation method of the liner is crucial. Currently, the industry commonly uses bolt fastening for liner installation. However, in practical applications, especially under high-impact conditions such as the coarse grinding stage of ore, this bolted connection method reveals many drawbacks. On the one hand, under high-intensity impact, bolts are prone to loosening. Once the bolts loosen, the liner will shift, and in severe cases, it may even fall off, affecting the normal operation of the grinding mill. On the other hand, due to the special nature of the bolted connection, the force on the liner is concentrated around the bolt holes. This uneven force distribution further exacerbates the displacement of the liner, reducing its stability and service life. Therefore, to meet the special requirements of high-impact conditions, the industry mostly adopts welding for liner installation in such situations to ensure that the liner is securely mounted on the grinding cylinder.

[0004] However, in actual welding operations, the applicant discovered through practice that the liner structures commonly found on the market are rather simple, while the grinding cylinder has an arc-shaped internal structure. This structural difference necessitates precise positioning during liner welding. Even slight deviations can affect the welding quality of the liner, consequently impacting the performance of the entire grinding machine. Furthermore, existing liner welding methods also have significant limitations. Currently, the liner can only be welded to the cylinder via its outer edge. This means that during grinding machine operation, the continuous turbulence of the ore and internal grinding media (such as steel balls) within the cylinder generates continuous and intense impacts on the welded area of ​​the liner. This sustained impact easily causes weld detachment, severely affecting the stability of the liner and significantly shortening its lifespan, increasing equipment maintenance costs and downtime. Summary of the Invention

[0005] This invention proposes a welding equipment for producing liners of mining grinding mills, which has the advantages of concealed weld seams and self-positioning of mother and daughter liners, thereby solving the problems of weld seam exposure and difficulty in positioning the liners during the welding process mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a welding device for producing liners of a mining grinding mill, comprising: a grinding cylinder, which is installed and positioned according to a support; a welding assembly for welding the liner inside the grinding cylinder; the liner is divided into a mother liner and a daughter liner, and both the mother liner and the daughter liner have a positioning groove in the middle, and a positioning liner with the same structure as the positioning groove is fixedly installed on the side of the daughter liner; the mother liner is attached to the inner wall of the grinding cylinder, and the welding assembly moves along the positioning groove on the inner side of the mother liner to achieve welding between the mother liner and the grinding cylinder, and the weld is located on the inner side of the mother liner; the positioning liner on the daughter liner is placed in the positioning groove of the already welded mother liner to achieve shielding of the weld between the mother liner and the grinding cylinder and to limit the installation of the daughter liner.

[0007] Furthermore, both the mother liner and the daughter liner have several ribs on their inner sides to increase the welding area with the grinding cylinder.

[0008] Furthermore, the positioning plate on the sub-liner is placed in the positioning groove on the already welded sub-liner, thereby concealing the weld seam on the already welded sub-liner and limiting the installation of the next sub-liner.

[0009] Furthermore, the liner also includes a tailing liner with the same structure as the positioning liner. The tailing liner is installed in the positioning groove to cover and hide the weld seams on the sub-liner.

[0010] Furthermore, a detection shaft protruding from the grinding cylinder is fixedly installed at the bottom of the end cap liner, and a pressure seat located on the outer side of the grinding cylinder is fixedly installed on the side of the detection shaft.

[0011] Furthermore, the cross-sectional shape of the shaft was found to be elliptical.

[0012] Furthermore, a spring is installed between the pressure seat and the grinding cylinder. The spring pushes the pressure seat so that the detection shaft pulls the sealing liner to always be in contact with the positioning groove of the sub-liner.

[0013] Furthermore, a guide groove is provided on the inner side of the grinding cylinder, which communicates with the positioning groove in the mother liner / daughter liner. A detection switch is fixedly installed on the side of the grinding cylinder at one side of the pressure seat end. The detection switch is connected to the control unit. After the detection switch is turned on, the control unit receives the signal and triggers an alarm.

[0014] Furthermore, the guide channel is an inclined channel, and the inclined channel near the end cap liner has the greatest depth.

[0015] The present invention has the following beneficial effects:

[0016] This invention provides a welding device for producing liners of a mining grinding mill. The liners are divided into two types: a mother liner and a daughter liner. Each liner has a positioning groove in its center. When welding begins, the welding assembly moves along the inner side of the mother liner and performs the welding operation. During this process, the weld seam is positioned inside the mother liner, creating conditions for subsequent concealment treatment.

[0017] After the initial welding of the mother liner plate is completed, the installation and welding of the daughter liner plate begins. The daughter liner plate is equipped with a positioning liner plate, the size and shape of which match the positioning grooves on the mother liner plate. The operator places the positioning liner plate from the daughter liner plate into the positioning grooves on the mother liner plate. On the one hand, the positioning liner plate completely conceals and covers the weld seam on the mother liner plate, hiding the weld seam within the internal space where the mother and daughter liner plates meet, thus avoiding direct contact with the ore inside the grinding cylinder. This concealed design greatly improves the durability and reliability of the liner plate.

[0018] On the other hand, once the positioning liner is inserted into the positioning groove, it can be precisely positioned. After positioning, the welding assembly welds along the inner side of the positioning groove on the sub-liner. After one sub-liner is welded, the positioning liner of the next sub-liner is placed into the positioning groove of the already welded sub-liner, and so on, in a cyclical manner. This cyclical welding method not only ensures that each weld seam is perfectly hidden inside the liner, but also continuously limits the sub-liner during the welding process, allowing the sub-liner to be precisely positioned axially along the inner side of the grinding cylinder without any offset or misalignment.

[0019] Through this welding process, the welding equipment ultimately achieved the remarkable effects of concealing the weld seam internally and self-positioning the mother and daughter liners. This not only improved the overall quality of the mining grinding mill liners and reduced the number of failures and repairs caused by exposed weld seams, but also increased production efficiency, reduced production costs, and provided a strong guarantee for the stable operation and long-term use of the mining grinding mill. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention.

[0021] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0022] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the grinding cylinder of the present invention;

[0024] Figure 3This is a schematic diagram of the overall internal planar structure of the present invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged structural diagram of section E in the middle;

[0026] Figure 5 This is a schematic diagram of the explosion state between the mother and daughter liner plates of the present invention;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the mother liner of the present invention;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the sub-liner of the present invention;

[0029] Figure 8 This is a schematic diagram of the three-dimensional structure of the sealing liner of the present invention;

[0030] Figure 9 This is a schematic diagram of the welding area of ​​the male / female liner plate of the present invention.

[0031] In the diagram: 1. Bracket; 2. Grinding cylinder; 200. Guide groove; 3. Conductive ring; 300. Detection switch; 4. Detection shaft; 5. Mother liner; 6. Daughter liner; 601. Positioning liner; 7. End liner; 8. Welding assembly; 9. Rib; 10. Positioning groove; 11. Pressure seat; 110. Spring. Detailed Implementation

[0032] 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 embodiments of the present invention, and not all embodiments. 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.

[0033] Example 1, please refer to Figure 1 and Figure 2 As can be seen, the grinding cylinder 2 to be welded is placed on the support 1, and the support 1 is used to install and limit its position. The welding assembly 8 set on one side of the support 1 can weld the liner plate into the inside of the grinding cylinder 2. The welding assembly 8 is mainly a robotic arm welding gun, which mainly includes key components such as the gun body, electrical control system, cooling system, wire feeding mechanism, protective gas delivery device, and robotic arm joint module. In actual use, it is sufficient to ensure that the welding assembly 8 can perform welding work on the liner plate.

[0034] in accordance with Figure 2 , Figures 5-7It can be seen that the liner is divided into a mother liner 5 and a daughter liner 6, and both the mother liner 5 and the daughter liner 6 have a positioning groove 10 in the middle, which is a rectangular groove. There are multiple mother liner 5 and daughter liner 6, the specific number of which can be determined according to the actual size of the cylinder. When welding the mother liner 5 and daughter liner 6 to the inside of the grinding cylinder 2, the mother liner 5 is first placed at one end of the inner side of the grinding cylinder 2, at which point the mother liner 5 is attached to the inner wall of the grinding cylinder 2. Then, the welding assembly 8 moves along the positioning groove 10 on the inner side of the mother liner 5, thereby welding the mother liner 5 to the grinding cylinder 2, with the weld located on the inner side of the mother liner 5. In practical applications, several ribs 9 are provided on the inner sides of both the mother liner 5 and the daughter liner 6, thereby increasing the welding area with the grinding cylinder 2. For details, refer to [reference needed]. Figure 9 The thickened black area in the middle indicates the actual weld location. It can be clearly seen that the ribs 9 increase the weldable areas between the mother liner 5 / daughter liner 6 and the grinding cylinder 2, ensuring that the mother liner 5 / daughter liner 6 can be firmly welded to the inner side of the grinding cylinder 2.

[0035] After the mother liner 5 is welded, the operator can then weld the daughter liner 6. Unlike the mother liner 5, the daughter liner 6 is positioned differently. Figure 5 and Figure 7 As can be seen, a positioning liner 601 is fixedly installed on the side of the sub-liner 6, and the shape and structure of the positioning liner 601 are consistent with those of the positioning groove 10. When the positioning liner 601 on the sub-liner 6 is placed in the positioning groove 10 on the mother liner 5, the positioning liner 601 blocks the weld seam inside the mother liner 5. Since the mother liner 5 and the sub-liner 6 need to withstand the impact of ore or grinding media inside the grinding cylinder 2 during application, the positioning liner 601 hides the weld seam inside the mother liner 5, thus preventing the weld seam from being directly affected by the impact of ore and grinding media, ultimately preventing the weld from detaching due to impact. Furthermore, the positioning liner 601, embedded in the positioning groove 10 on the mother liner 5, limits the installation of the sub-liner 6. After the sub-liner 6 is attached to the inner wall of the grinding cylinder 2, the welding assembly 8 is used to weld along the positioning groove 10 on the inner side of the sub-liner 6, so that the sub-liner 6 is welded to the inner side of the grinding cylinder 2.

[0036] Finally, the positioning plate 601 on the next sub-liner 6 is placed in the positioning groove 10 on the already welded sub-liner 6, thereby hiding the weld on the already welded sub-liner 6. Furthermore, the positioning plate 601 limits the next sub-liner 6. This cycle is repeated to ensure that the sub-liner 6 can be accurately placed along the axial direction of the inner wall of the grinding cylinder 2, thereby achieving the purpose of self-positioning of the sub-liner 6.

[0037] Example 2 is a further improvement on Example 1. Please refer to Example 1. Figure 4 , Figure 5 and Figure 8 It can be seen that the liner also includes a tail-sealing liner 7, which has the same structure as the positioning liner 601. In this way, after the last sub-liner 6 is welded, the tail-sealing liner 7 is installed in the positioning groove 10, thereby sealing the positioning groove 10 on the last sub-liner 6.

[0038] Regarding the method of fixing the end cap liner 7, from Figure 3 , Figure 4 and Figure 8 As can be seen, a detection shaft 4 passing through the grinding cylinder 2 is fixedly installed at the bottom of the end cap liner 7. The cross-sectional shape of the detection shaft 4 is preferably elliptical. In this way, the end cap liner 7 is placed in the positioning groove 10 on the sub-liner 6 by means of the restriction of the detection shaft 4. A pressure seat 11 located on the outer side of the grinding cylinder 2 is fixedly installed on the side of the detection shaft 4, and the movement of the detection shaft 4 can be restricted by the pressure seat 11.

[0039] More specifically, a spring 110 is installed between the pressure seat 11 and the grinding cylinder 2. Under the action of the spring force, the detection shaft 4 pulls the sealing liner 7 so that it always tends to adhere to the sub-liner 6, ensuring that the sealing liner 7 seals the positioning groove 10 on the sub-liner 6. Furthermore, from... Figure 3 , Figure 4 and Figure 9 It can be seen that the inner side of the grinding cylinder 2 has a guide groove 200 that communicates with the positioning groove 10 in the mother liner 5 / daughter liner 6. The guide groove 200 is an inclined groove, and the inclined groove near the end liner 7 has the greatest depth. A detection switch 300 is fixedly installed on the side of the grinding cylinder 2, located on one side of the end of the pressure seat 11. When the end liner 7 pulls the detection shaft 4 away from the daughter liner 6, the pressure seat 11 can finally abut against the detection switch 300. The detection switch 300 is generally connected to the control unit. When the detection switch 300 is turned on, the control unit receives the signal and triggers an alarm. In detail, for the power supply of the detection switch 300, a conductive ring 3 is provided on the side of the grinding cylinder 2, and an external brush (not shown) is provided in conjunction with it. When the grinding cylinder 2 rotates, the brush is always in contact with the conductive ring 3, thereby ensuring power supply to the detection switch 300.

[0040] In practical applications, when the sub-liner 6 and end-sealing liner 7 inside the grinding cylinder 2 are installed and put into use, under normal conditions, the main liner 5, sub-liner 6, and end-sealing liner 7 are attached together, so the guide channel 200 is not connected to the inside of the grinding cylinder 2. Therefore, when the grinding cylinder 2 rotates and uses the grinding media to crush the ore, no ore will enter the guide channel 200.

[0041] If, during prolonged use, the sub-liner 6 becomes damaged or detached from its weld, causing it to move, the positioning liner 601 will not properly cover the positioning groove 10. Subsequently, the ground fine ore will enter the guide trough 200 through the leak. When the guide trough 200 is at its lowest point, the inclined plane causes the ore to tend to move towards the sealing liner 7. After the grinding cylinder 2 rotates 180°, the guide trough 200 carrying the ore moves to its uppermost position, above the sealing liner 7. The ore presses against the sealing liner 7, causing it to move away from the sub-liner 6. At this time, the detection shaft 4 pulls the pressure seat 11 to press the spring 110. The pressure seat 11 abuts against the detection switch 300, which sends an electrical signal to the control unit. The control unit then alarms, alerting the operator that the liner inside the grinding cylinder 2 has malfunctioned, such as detached weld or damage, and requires repair.

Claims

1. A welding equipment for producing liners of a mining grinding mill, characterized in that, include: The grinding cylinder (2) is installed and positioned according to the bracket (1); Welding assembly (8) is used to weld the liner inside the grinding cylinder (2); The liner is divided into a mother liner (5) and a daughter liner (6), and a positioning groove (10) is provided in the middle of both the mother liner (5) and the daughter liner (6). A positioning liner (601) with the same structure as the positioning groove (10) is fixedly installed on the side of the daughter liner (6). The mother liner (5) is attached to the inner wall of the grinding cylinder (2), and the welding assembly (8) moves along the positioning groove (10) on the inner side of the mother liner (5) to achieve welding of the mother liner (5) and the grinding cylinder (2), and the weld is located on the inner side of the mother liner (5); the positioning liner (601) on the sub-liner (6) is placed in the positioning groove (10) of the already welded mother liner (5) to achieve shielding of the weld between the mother liner (5) and the grinding cylinder (2) and to limit the installation of the sub-liner (6).

2. The welding equipment for producing liners of mining grinding mills according to claim 1, characterized in that, Both the mother liner (5) and the daughter liner (6) have several ribs (9) on their inner sides to increase the welding area with the grinding cylinder (2).

3. The welding equipment for producing liners of mining grinding mills according to claim 1, characterized in that, The positioning plate (601) on the sub-liner (6) is placed in the positioning groove (10) on the already welded sub-liner (6) to achieve the concealment of the weld on the already welded sub-liner (6) and the installation limit of the next sub-liner (6).

4. The welding equipment for producing liners of a mining grinding mill according to claim 1, characterized in that, The liner also includes a tailing liner (7) with the same structure as the positioning liner (601). The tailing liner (7) is installed in the positioning groove (10) to cover and hide the weld seam on the sub-liner (6).

5. The welding equipment for producing liners of mining grinding mills according to claim 4, characterized in that, The bottom of the end cap liner (7) is fixedly installed with a detection shaft (4) that passes through the grinding cylinder (2), and a pressure seat (11) located on the outside of the grinding cylinder (2) is fixedly installed on the side of the detection shaft (4).

6. The welding equipment for producing liners of mining grinding mills according to claim 5, characterized in that, The cross-sectional shape of the test shaft (4) is elliptical.

7. The welding equipment for producing liners of mining grinding mills according to claim 5, characterized in that, A spring (110) is provided between the pressure seat (11) and the grinding cylinder (2). The spring (110) pushes the pressure seat (11) so that the detection shaft (4) pulls the sealing liner (7) to always be attached to the positioning groove (10) of the sub-liner (6).

8. The welding equipment for producing liners of mining grinding mills according to claim 7, characterized in that, The grinding cylinder (2) has a guide groove (200) that communicates with the positioning groove (10) in the mother liner (5) / daughter liner (6) on the inner side, and a detection switch (300) located on the side of the pressure seat (11) is fixedly installed on the side of the grinding cylinder (2). The detection switch (300) is connected to the control unit. After the detection switch (300) is turned on, the control unit receives the signal and triggers an alarm.

9. The welding equipment for producing liners of mining grinding mills according to claim 7, characterized in that, The guide channel (200) is an inclined channel, and the inclined channel near the end cap liner (7) has the greatest depth.

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