Fine descaling tangent point double-cylinder injection valve

Abstract

The utility model relates to a fine descaling tangent point double-cylinder injection valve, which comprises a valve body, a valve cover is fixed on the valve body, two driving cylinders which are distributed up and down are fixed on the valve cover through a cylinder mounting seat, a valve rod extending into the valve body is arranged at the output end of each driving cylinder, a plunger is fixed at the bottom end of each valve rod, and a piston is fixed at the bottom end of each plunger. A circle of liquid penetrating holes are formed in the plunger, an inlet is formed in the left side of the valve body, and an outlet is formed in the right side of the valve body. Compared with single-cylinder control in the prior art, the fine descaling tangent point double-cylinder injection valve has the advantages that double-cylinder design is adopted, the valve rod is driven to move up and down, and the switching speed of the valve is effectively increased by increasing the response speed of the valve rod; and through the arrangement of a series of sealing structures, when the valve rod drives the plunger to move up and down, the sealing performance of the valve is higher, and liquid leakage is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of descaling injection valves, in particular to a fine descaling cut-point double-cylinder injection valve. Background Art

[0002] Descaling injection valve is mainly used in the hot rolling descaling system of the metallurgical industry. It is installed on the pipeline with water as the medium to remove the oxide scale on the surface of the steel plate or billet.

[0003] Existing descaling injection valves usually use pneumatic control, and the single-cylinder control method has poor response rate and switching rate when the valve stem is controlled to move up and down. In addition, since the valve stem is controlled by the cylinder, its end needs to extend out of the valve body. In order to achieve sealing, a seal that fits the valve stem is usually directly set on the inner wall of the valve body. The sealing setting method is relatively simple, resulting in insufficient sealing performance. Therefore, a fine descaling cut-point double-cylinder injection valve is proposed to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a fine descaling and cut-point double-cylinder injection valve, which has the advantages of fast response speed, etc., and solves the problems of poor response rate and switching rate of the injection valve and a relatively single sealing setting method when the valve stem is moved up and down in the single-cylinder control mode.

[0005] To achieve the above object, the utility model provides the following technical solutions: a fine descaling cut-point double-cylinder injection valve, comprising a valve body, a valve cover fixed on the valve body, two driving cylinders distributed up and down fixed on the valve cover through a cylinder mounting seat, a valve stem extending into the valve body is provided at the output end of the driving cylinder, a plunger is fixed at the bottom end of the valve stem, a circle of liquid permeable holes is provided on the plunger, an inlet is provided on the left side of the valve body, and an outlet is provided on the right side of the valve body;

[0006] A valve cover inner sleeve is embedded in the top surface of the valve cover, and an inner sleeve pressure cover is fastened to the top surface of the valve cover by screws. The inner sleeve pressure cover presses the valve cover inner sleeve into the valve cover, and the valve stem passes through the valve cover inner sleeve and the inner sleeve pressure cover to extend above the valve cover. A dust ring cooperating with the valve stem is arranged in the inner sleeve pressure cover, and a sealing ring and a guide ring cooperating with the valve stem are arranged in the valve cover inner sleeve.

[0007] Furthermore, the two driving cylinders are connected via a cylinder spacer, a cylinder cover is fixed to the top of the top driving cylinder, piston parts are arranged in the two driving cylinders, a piston rod sleeve is commonly fixed in the two piston parts, a piston rod part is fixed in the piston rod sleeve, the top end of the piston rod part extends to the top of the cylinder cover, and the bottom end of the piston rod part is fixed to the valve stem via a coupling.

[0008] Furthermore, a valve sleeve and a pressing sleeve are provided in the valve body cavity, the valve cover is fastened to the top of the valve body by screws, and the valve sleeve is pressed into the valve body cavity by the pressing sleeve, and the plunger can move up and down in the valve sleeve.

[0009] Furthermore, the bottom end of the valve stem extends into the plunger, and the plunger is embedded with three open rings located above the bottom end of the valve stem. A small pressure cover is fastened to the bottom end of the valve stem by screws.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0011] Compared with the single-cylinder control in the prior art, the fine descaling and cutting-point double-cylinder injection valve adopts a double-cylinder design, which drives the valve stem to move up and down at the same time, thereby effectively improving the switching speed of the valve by improving the response speed of the valve stem; and through the setting of a series of sealing structures, when the valve stem drives the plunger to move up and down, the sealing performance of the valve is stronger and it is not easy to leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the positions of the inner sleeve of the valve cover and the inner sleeve gland of the utility model;

[0014] Figure 3 It is a schematic diagram of the positions of the three open rings and the small pressure cover of the utility model.

[0015] In the figure: 1. valve body; 2. valve cover; 3. cylinder mounting seat; 4. driving cylinder; 5. valve stem; 6. plunger; 7. liquid permeable hole; 8. inlet; 9. outlet; 10. cylinder spacer; 11. cylinder upper cover; 12. piston part; 13. piston rod sleeve; 14. piston rod part; 15. coupling; 16. valve cover inner sleeve; 17. inner sleeve pressure cover; 18. dustproof ring; 19. sealing ring; 20. guide ring; 21. valve sleeve; 22. pressure sleeve; 23. three-open ring; 24. small pressure cover. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0017] See also Figure 1-3A fine descaling and cutting-point double-cylinder injection valve in this embodiment includes a valve body 1, a valve cover 2 is fixed on the valve body 1, a cylinder mounting seat 3 is fixed on the valve cover 2 through a special-shaped stud, a driving cylinder 4 is fixed on the cylinder mounting seat 3, and an output end of the driving cylinder 4 is provided with a valve stem 5 extending into the valve body 1, a plunger 6 is fixed to the bottom end of the valve stem 5, and a circle of liquid permeable holes 7 is provided on the plunger 6, an inlet 8 is provided on the left side of the valve body 1, and an outlet 9 is provided on the right side of the valve body 1.

[0018] The valve body 1 is provided with a cavity, which is connected with the inlet 8 and the outlet 9 to form a fluid channel. The cavity of the valve body 1 can allow the plunger 6 to move up and down. By driving the cylinder 4 to control the valve stem 5 to move up and down, the plunger 6 can be driven by the valve stem 5 to move down or up, thereby realizing the opening and closing of the valve body 1. The plunger 6 moves down to the position as shown in FIG. Figure 1 In the state shown, the fluid can enter the cavity of the valve body 1 from the inlet 8, and then flow to the outlet 9 through the liquid permeable hole 7 of the plunger 6. Conversely, when the valve stem 5 moves upward, the liquid permeable hole 7 on the plunger 6 is no longer connected with the outlet 9, and the fluid cannot pass.

[0019] As a preferred embodiment, there are two driving cylinders 4, which are distributed up and down on the cylinder mounting seat 3. The two driving cylinders 4 are connected by a cylinder spacer 10. A cylinder cover 11 is fixed to the top of the top driving cylinder 4. The two driving cylinders 4 can jointly control the up and down movement of the valve stem 5. The simultaneous control of the two driving cylinders 4 can make the response speed of the valve stem 5 faster, and the opening and closing of the valve body 1 faster.

[0020] As for how the two driving cylinders 4 jointly drive the valve stem 5 to move, specifically, Figure 1 As shown, two driving cylinders 4 are provided with piston parts 12, and piston rod sleeves 13 are fixed in the two piston parts 12. A piston rod part 14 is fixed in the piston rod sleeve 13. The top end of the piston rod part 14 extends to the top of the cylinder cover 11, and the bottom end of the piston rod part 14 is fixed to the valve stem 5 through a coupling 15. A sealing ring is provided in the cylinder cover 11 and the cylinder spacer 10 to provide sealing when the piston rod part 14 moves up and down. When the two driving cylinders 4 are inhaled at the same time, the gas can push the piston part 12 to move up and down. Driven by the piston rod sleeve 13, the piston rod part 14 drives the valve stem 5 to move up and down.

[0021] Since the top end of the valve stem 5 extends to the top of the valve cover 2 and is connected to the piston rod part 14, in order to ensure the sealing of the valve stem 5 when it moves, a valve cover inner sleeve 16 is embedded in the top surface of the valve cover 2, and the top surface of the valve cover 2 is fastened with an inner sleeve pressure cover 17 by screws. The inner sleeve pressure cover 17 presses the valve cover inner sleeve 16 into the valve cover 2, and the valve stem 5 passes through the valve cover inner sleeve 16 and the inner sleeve pressure cover 17 to extend above the valve cover 2. A dust ring 18 cooperating with the valve stem 5 is provided in the inner sleeve pressure cover 17, and a sealing ring 19 and a guide ring 20 cooperating with the valve stem 5 are provided in the valve cover inner sleeve 16, so that the sealing and stability of the valve stem 5 are better when it passes through the valve cover 2 and moves up and down.

[0022] A valve sleeve 21 and a pressing sleeve 22 are provided in the cavity of the valve body 1. The valve cover 2 is fastened to the top of the valve body 1 by screws, and the valve sleeve 21 is pressed into the cavity of the valve body 1 by the pressing sleeve 22. The plunger 6 can move up and down in the valve sleeve 21, and seals are provided between the valve sleeve 21 and the inner wall of the valve body 1 and between the valve sleeve 21 and the plunger 6 to improve the sealing performance.

[0023] The bottom end of the valve stem 5 extends into the plunger 6, and the plunger 6 is embedded with a three-open ring 23 located above the bottom end of the valve stem 5. A small pressure cover 24 is fastened to the bottom end of the valve stem 5 by screws. First, the bottom end of the valve stem 5 is passed into the plunger 6, and then the three-open ring 23 is placed in the corresponding groove of the plunger 6. Finally, the small pressure cover 24 is locked to the bottom end of the valve stem 5, and the plunger 6 and the valve stem 5 can be assembled.

[0024] By adopting the above-mentioned fine scale-cutting double-cylinder injection valve, the opening and closing speed of the valve is improved. The specific use method is as follows:

[0025] The two driving cylinders 4 are simultaneously charged with gas, and the gas can push the piston part 12 to move up and down. Driven by the piston rod sleeve 13, the piston rod part 14 drives the valve stem 5 to move up and down, and the plunger 6 moves down to the position as shown in FIG. Figure 1 In the state shown, the fluid can enter the cavity of the valve body 1 from the inlet 8, and then flow to the outlet 9 through the liquid permeable hole 7 of the plunger 6. Conversely, when the valve stem 5 moves upward, the liquid permeable hole 7 on the plunger 6 is no longer connected with the outlet 9, and the fluid cannot pass.

[0026] The control method of the present invention is controlled by a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fine descaling cut-point dual-cylinder injection valve, characterized in that: The valve body (1) comprises a valve cover (2) fixed on the valve body (1), two driving cylinders (4) arranged in an upper and lower manner are fixed on the valve cover (2) via a cylinder mounting seat (3), a valve stem (5) extending into the valve body (1) is provided at the output end of the driving cylinder (4), a plunger (6) is fixed at the bottom end of the valve stem (5), a circle of liquid permeable holes (7) is provided on the plunger (6), an inlet (8) is provided on the left side of the valve body (1), and an outlet (9) is provided on the right side of the valve body (1); The top surface of the valve cover (2) is embedded with a valve cover inner sleeve (16), and the top surface of the valve cover (2) is fastened with an inner sleeve pressure cover (17) by screws. The valve stem (5) passes through the valve cover inner sleeve (16) and the inner sleeve pressure cover (17) and extends to the top of the valve cover (2). The inner sleeve pressure cover (17) is provided with a dust ring (18) that cooperates with the valve stem (5), and the valve cover inner sleeve (16) is provided with a sealing ring (19) and a guide ring (20) that cooperate with the valve stem (5).

2. A fine descaling cut-point dual-cylinder injection valve according to claim 1, characterized in that: The two driving cylinders (4) are connected via a cylinder spacer (10); a cylinder cover (11) is fixed to the top of the driving cylinder (4); a piston portion (12) is provided in the two driving cylinders (4); a piston rod sleeve (13) is fixed in the two piston portions (12); a piston rod portion (14) is fixed in the piston rod sleeve (13); the top end of the piston rod portion (14) extends to the top of the cylinder cover (11); and the bottom end of the piston rod portion (14) is fixed to the valve stem (5) via a coupling (15).

3. A fine descaling cut-point dual-cylinder injection valve according to claim 1, characterized in that: A valve sleeve (21) and a pressing sleeve (22) are provided in the cavity of the valve body (1); the valve cover (2) is fastened to the upper side of the valve body (1) by means of screws, and the valve sleeve (21) is pressed into the cavity of the valve body (1) by means of the pressing sleeve (22); the plunger (6) can move up and down in the valve sleeve (21).

4. A fine descaling cut-point dual-cylinder injection valve according to claim 1, characterized in that: The bottom end of the valve stem (5) extends into the plunger (6), and the plunger (6) is embedded with a three-open ring (23) located above the bottom end of the valve stem (5). A small pressure cover (24) is fastened to the bottom end of the valve stem (5) by screws.

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