High-strength valve plate of rolling mill

Abstract

The high-strength valve plate of the rolling mill comprises a valve plate body, a U-shaped connecting block is welded to one side of the valve plate body, an adjusting shaft vertically penetrates through one side of the U-shaped connecting block, limiting grooves are formed in the two sides of the U-shaped connecting block, and positioning mechanisms are connected between the limiting grooves and the adjusting shaft. The valve plate body and the adjusting shaft can be assembled conveniently, and a sealing groove is formed in the edge of the valve plate body. When the valve plate main body is used for sealing, inert gas in the storage air bag is extruded towards the interior of the expansion air bag by utilizing the impact effect of liquid on the movable plate, so that the expansion air bag is promoted to further expand outwards, and the sealing ring generates outward extrusion force; therefore, the contact tightness between the valve plate main body and the to-be-sealed piece is promoted, the sealing effect of the valve plate main body is improved, and the long-term sealing performance of the valve plate is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of valve plates, in particular to a high-strength valve plate for a rolling mill. Background Art

[0002] The butterfly valve, also called flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. The butterfly valve is needed in the hydraulic system of the rolling mill, and is usually combined with the hydraulic servo motor on the rolling mill.

[0003] Chinese patent authorization announcement number CN216078351U discloses a high-strength valve plate for a rolling mill, which is composed of a valve shaft, a mounting cover a, a suction plate a, a mounting cover b, a suction plate b, a connecting block, a valve plate and a fixing part. The surface of the valve shaft is provided with a mounting cover a, one side of the mounting cover a is provided with a suction plate a, one side of the mounting cover a is provided with a mounting cover b, and one side of the mounting cover b is fixed with a suction plate b. By providing a disassembly device, it is convenient for people to replace the valve plate, thereby avoiding the situation where the valve plate leaks during long-term use and causes inconvenience in replacement. The above-mentioned prior art solution has the following shortcomings: the sealing ring on the edge is mainly used to improve the sealing performance of the valve plate in the valve plate structure, and its structure is relatively simple. During the repeated rotation and adjustment process of the valve plate, due to the continuous friction of the sealing ring, the contact tightness between it and the external shell is continuously reduced, which in turn affects its sealing effect, so there is a certain room for improvement. Utility Model Content

[0004] The utility model aims to provide a high-strength valve plate for a rolling mill, so as to solve the problem that the sealing structure of the existing valve plate for a rolling mill mentioned in the background technology is relatively simple and the long-term sealing effect is average.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-strength valve plate for a rolling mill, comprising a valve plate body, a U-shaped connecting block welded on one side of the valve plate body, and an adjusting shaft vertically penetrates through one side of the U-shaped connecting block, limiting grooves are provided on both sides of the U-shaped connecting block, and a positioning mechanism is connected between the limiting groove and the adjusting shaft to facilitate the assembly of the valve plate body and the adjusting shaft, a sealing groove is provided on the edge of the valve plate body, and an expansion airbag is installed inside the sealing groove, a sealing ring is adhered to the outer edge of the expansion airbag, and the outer side of the sealing ring extends to the outside of the sealing groove, a movable groove is provided on the side of the valve plate body away from the adjusting shaft, and a storage airbag is installed at the bottom end of the movable groove, connecting pipes are evenly penetrated and connected between the storage airbag and the expansion airbag, the interiors of the storage airbag and the expansion airbag are both filled with inert gas, and an inert gas transfer mechanism is provided on the side of the movable groove away from the storage airbag to transfer the inert gas in the storage airbag to the expansion airbag to promote the outward expansion of the expansion airbag.

[0006] Preferably, the positioning mechanism includes a positioning groove opened on the side of the adjusting shaft away from the U-shaped connecting block, and a U-shaped positioning block is installed inside the positioning groove, both sides of the U-shaped positioning block extend into the interior of the limiting groove, and both sides of the U-shaped positioning block are connected to the limiting groove with a fixing mechanism.

[0007] Preferably, the fixing mechanism comprises a positioning hole formed on one side of the U-shaped positioning block, and a threaded groove is formed on the inner side of the limiting groove on one side of the positioning hole, and a locking bolt is connected through the threaded groove and the positioning hole.

[0008] Preferably, the inert gas transfer mechanism includes a limiting guide rod evenly installed inside the movable groove, and the limiting guide rod is located outside the storage airbag, the outer part of the limiting guide rod is sleeved with a movable plate, and the bottom end of the movable plate is installed with a pressure block, and the bottom end of the pressure block is against the top end of the storage airbag.

[0009] Preferably, the diameter of the movable plate is larger than the diameter of the movable groove, the movable plate slides up and down along the limiting guide rod, and a hemispherical groove is provided on a side of the movable plate away from the pressing block.

[0010] Preferably, the diameter of the pressing block is matched with the diameter of the movable groove, and the bottom end surface of the pressing block is an outwardly convex curved surface.

[0011] Preferably, a reinforcement ring is installed on one side of the valve plate body close to the movable groove, and reinforcement rods are evenly welded inside the reinforcement ring, and the reinforcement rods are distributed inside the reinforcement ring in a staggered ring shape.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) When the valve plate body is sealing, the impact of the liquid on the movable plate is used to make the movable plate drive the pressure block to squeeze the storage airbag, thereby squeezing the inert gas inside the storage airbag into the inside of the expansion airbag, so as to promote the further expansion of the expansion airbag outward, so that the sealing ring is further squeezed outward, and then the tightness between the valve plate body and the sealed part is promoted, thereby improving the sealing effect of the valve plate body. At the same time, the expansion effect of the expansion airbag is used to provide additional driving force for the sealing ring, so that the contact between the sealing ring and the sealed part is more compact, thereby ensuring the long-term sealing of the valve plate;

[0014] (2) Through the cooperation between the limit groove, the positioning groove and the U-shaped positioning block, the position of the valve plate body on the adjusting shaft can be initially positioned, which is then helpful to prevent the valve plate body from moving up and down. Under the action of the threaded groove, the positioning hole and the locking bolt, the positioning hole and the U-shaped connecting block can be further effectively fixed and connected to prevent the rotation of the adjusting shaft from causing the valve plate body to rotate out of position, thereby improving the stability of the valve plate body installation, and this installation method is simple to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the valve plate main body of the utility model;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the valve plate main body section of the utility model.

[0020] Explanation of the reference numerals in the figure: 1. Valve plate body; 2. U-shaped connecting block; 3. Adjusting shaft; 4. Threaded groove; 5. Limiting groove; 6. Positioning groove; 7. U-shaped positioning block; 8. Positioning hole; 9. Locking bolt; 10. Movable groove; 11. Storage air bag; 12. Connecting pipe; 13. Inflatable air bag; 14. Sealing ring; 15. Sealing groove; 16. Limiting guide rod; 17. Movable plate; 18. Reinforcement ring; 19. Reinforcement rod; 20. Pressure block. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4, the utility model provides an embodiment: a high-strength valve plate for a rolling mill, comprising a valve plate body 1;

[0023] A reinforcement ring 18 is installed on one side of the valve plate body 1 close to the movable groove 10, and reinforcement rods 19 are evenly welded inside the reinforcement ring 18, and the reinforcement rods 19 are distributed inside the reinforcement ring 18 in a staggered ring shape;

[0024] Specifically, Figure 3 and Figure 4 As shown, when in use, the reinforcing rings 18 are interlaced to improve the structural strength of the reinforcing rod 19 in the radial direction, thereby preventing the reinforcing rod 19 from cracking under impact, so as to make it tighten the outer side of the valve plate body 1 and ensure the structural strength of the valve plate body 1;

[0025] A U-shaped connecting block 2 is welded to one side of the valve plate body 1, and an adjusting shaft 3 vertically penetrates one side of the U-shaped connecting block 2. Limiting grooves 5 are provided on both sides of the U-shaped connecting block 2, and a positioning mechanism is connected between the limiting groove 5 and the adjusting shaft 3;

[0026] The positioning mechanism includes a positioning groove 6 opened on the side of the adjustment shaft 3 away from the U-shaped connecting block 2, and a U-shaped positioning block 7 is installed inside the positioning groove 6, and both sides of the U-shaped positioning block 7 extend to the inside of the limiting groove 5, and both sides of the U-shaped positioning block 7 are connected to the limiting groove 5 by a fixing mechanism;

[0027] The fixing mechanism includes a positioning hole 8 opened on one side of the U-shaped positioning block 7, and a thread groove 4 is correspondingly opened on the inner side of the limiting groove 5 on one side of the positioning hole 8, and a locking bolt 9 is connected between the thread groove 4 and the positioning hole 8;

[0028] Specifically, Figure 1 As shown, when in use, the U-shaped positioning block 7, the positioning groove 6 and the limiting groove 5 are used to initially limit the valve plate body 1, and the locking bolt 9 is used to make one side of the U-shaped positioning block 7 close to one side of the positioning groove 6, thereby improving the connection stability between the U-shaped connecting block 2 and the adjusting shaft 3, and preventing the adjusting shaft 3 from causing the valve plate body 1 to rotate out of position when rotating;

[0029] In order to facilitate the assembly of the valve plate body 1 and the adjusting shaft 3, a sealing groove 15 is provided on the edge of the valve plate body 1, and an expansion airbag 13 is installed inside the sealing groove 15, a sealing ring 14 is adhered to the outer edge of the expansion airbag 13, and the outer side of the sealing ring 14 extends to the outside of the sealing groove 15, a movable groove 10 is provided on the side of the valve plate body 1 away from the adjusting shaft 3, and a storage airbag 11 is installed at the bottom end of the movable groove 10, a connecting pipe 12 is evenly penetrated and connected between the storage airbag 11 and the expansion airbag 13, the interior of the storage airbag 11 and the expansion airbag 13 are filled with inert gas, and an inert gas transfer mechanism is provided on the side of the movable groove 10 away from the storage airbag 11;

[0030] The inert gas transfer mechanism includes a limiting guide rod 16 evenly installed inside the movable groove 10, and the limiting guide rod 16 is located outside the storage airbag 11, and a movable plate 17 is sleeved outside the limiting guide rod 16, and a pressing block 20 is installed at the bottom end of the movable plate 17, and the bottom end of the pressing block 20 is against the top end of the storage airbag 11;

[0031] The diameter of the movable plate 17 is larger than the diameter of the movable groove 10. The movable plate 17 slides up and down along the limiting guide rod 16. A hemispherical groove is provided on the side of the movable plate 17 away from the pressing block 20.

[0032] The diameter of the pressing block 20 matches the diameter of the movable groove 10, and the bottom end surface of the pressing block 20 is an outward convex curved surface;

[0033] To transfer the inert gas in the storage airbag 11 to the expansion airbag 13, so as to promote the outward expansion of the expansion airbag 13;

[0034] Specifically, Figure 2 , Figure 3 and Figure 4 As shown, when in use, the groove structure on the outside of the movable plate 17 is used to gather the impact of the liquid, so that the movable plate 17 produces axial movement under the impact of the liquid, and then the pressing block 20 has an squeezing effect on the storage airbag 11, so that the internal space of the storage airbag 11 is compressed, and the inert gas can only be transferred to the expansion airbag 13, thereby promoting the outward expansion of the expansion airbag 13 and making the sealing squeezing effect of the sealing ring 14 better.

[0035] Working principle: When the utility model is used, firstly, the U-shaped connecting block 2 is clamped on one side of the adjusting shaft 3, the U-shaped positioning block 7 is clamped on one side of the positioning groove 6, and the two sides of the U-shaped positioning block 7 are clamped into the inside of the limiting groove 5, so that the positioning hole 8 corresponds to the threaded groove 4 one by one, and then the locking bolt 9 is used to screw the U-shaped positioning block 7 and the U-shaped connecting block 2, so that the valve plate body 1 and the adjusting shaft 3 are installed and fixed;

[0036] Secondly, by starting the hydraulic servo motor on the rolling mill, the adjusting shaft 3 is rotated, so that the valve plate body 1 drives the movable plate 17 to rotate to the liquid inlet, so that the outer edge of the sealing ring 14 is in close contact with the inner wall of the part to be sealed, so as to achieve a sealing effect, and when the movable plate 17 is opposite to the liquid inlet, the liquid generates an axial pressure on the movable plate 17, so that the movable plate 17 is close to the storage airbag 11 along the limiting guide rod 16, so that the pressing block 20 generates an extrusion effect on the storage airbag 11, so that the inert gas inside the storage airbag 11 is squeezed into the inside of the expansion airbag 13 along the connecting pipe 12, so as to promote the outward expansion of the expansion airbag 13, so that the expansion airbag 13 generates a radial extrusion force on the sealing ring 14, so that the sealing ring 14 is continuously close to and squeezed to the part to be sealed, so as to promote the sealing effect of the valve plate body 1;

[0037] Finally, the reinforcing rod 19 is used to exert traction on the inside of the reinforcing ring 18, thereby improving the fastening effect of the reinforcing ring 18 on the valve plate body 1, reducing cracking of the valve plate body 1 under liquid impact, and ensuring the structural strength of the valve plate body 1.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A high-strength valve plate for a rolling mill, comprising a valve plate body (1), characterized in that: A U-shaped connecting block (2) is welded to one side of the valve plate body (1), and an adjusting shaft (3) vertically penetrates one side of the U-shaped connecting block (2). Limiting grooves (5) are provided on both sides of the U-shaped connecting block (2), and a positioning mechanism is connected between the limiting groove (5) and the adjusting shaft (3) to facilitate assembly of the valve plate body (1) and the adjusting shaft (3). A sealing groove (15) is provided on the edge of the valve plate body (1), and an expansion airbag (13) is installed inside the sealing groove (15). A sealing ring (14) is adhered to the outer edge of the expansion airbag (13), and the outer side of the sealing ring (14) extends to the sealing groove ( 15), a movable groove (10) is provided on the side of the valve plate body (1) away from the adjusting shaft (3), and a storage airbag (11) is installed at the bottom end of the movable groove (10), and a connecting pipe (12) is evenly connected between the storage airbag (11) and the expansion airbag (13), and the interiors of the storage airbag (11) and the expansion airbag (13) are both filled with inert gas, and an inert gas transfer mechanism is provided on the side of the movable groove (10) away from the storage airbag (11) to transfer the inert gas in the storage airbag (11) to the expansion airbag (13), so as to promote the outward expansion of the expansion airbag (13).

2. A high-strength valve plate for a rolling mill according to claim 1, characterized in that: The positioning mechanism comprises a positioning groove (6) formed on a side of the adjusting shaft (3) away from the U-shaped connecting block (2), and a U-shaped positioning block (7) is installed inside the positioning groove (6), two sides of the U-shaped positioning block (7) extend into the interior of the limiting groove (5), and a fixing mechanism is connected between the two sides of the U-shaped positioning block (7) and the limiting groove (5).

3. A high-strength valve plate for a rolling mill according to claim 2, characterized in that: The fixing mechanism comprises a positioning hole (8) formed on one side of the U-shaped positioning block (7), and a thread groove (4) is formed on the inner side of the limiting groove (5) on one side of the positioning hole (8), and a locking bolt (9) is connected through the thread groove (4) and the positioning hole (8).

4. The high-strength valve plate for a rolling mill according to claim 1, characterized in that: The inert gas transfer mechanism comprises a limiting guide rod (16) evenly installed inside the movable groove (10), and the limiting guide rod (16) is located outside the storage air bag (11), and a movable plate (17) is sleeved outside the limiting guide rod (16), and a pressing block (20) is installed at the bottom end of the movable plate (17), and the bottom end of the pressing block (20) abuts against the top end of the storage air bag (11).

5. The high-strength valve plate for a rolling mill according to claim 4, characterized in that: The diameter of the movable plate (17) is greater than the diameter of the movable groove (10), and the movable plate (17) slides up and down along the limiting guide rod (16). A hemispherical groove is provided on the side of the movable plate (17) away from the pressing block (20).

6. The high-strength valve plate for a rolling mill according to claim 4, characterized in that: The diameter of the pressing block (20) is matched to the diameter of the movable groove (10), and the bottom end surface of the pressing block (20) is an outwardly convex curved surface.

7. The high-strength valve plate for a rolling mill according to claim 1, characterized in that: A reinforcement ring (18) is installed on one side of the valve plate body (1) close to the movable groove (10), and reinforcement rods (19) are uniformly welded inside the reinforcement ring (18), and the reinforcement rods (19) are distributed inside the reinforcement ring (18) in a staggered ring shape.

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