Water-cooling air-sealing plug valve driven by rotating cylinder and using method of water-cooling air-sealing plug valve

Abstract

The invention belongs to the technical field of metal smelting, and particularly relates to a water-cooling air-tight plug valve driven by a rotating cylinder and a using method of the water-cooling air-tight plug valve. The plug valve has the advantages of being simple in structure, small in size, rapid in opening and closing, long in service life, convenient to maintain and the like, the plug shaft is directly driven to rotate through the rotating cylinder and the operating rod, rapid opening and closing are achieved, and the overhauling efficiency is effectively improved; by arranging the sealing ring on the cock shaft, the problems of thermal deformation and abrasion of a traditional metal hard seal are solved, the leakage risk is greatly reduced, and the high maintenance cost caused by sealing failure is reduced; furthermore, the plug valve is provided with a cooling system, it is ensured that the valve body is kept at a low temperature during continuous operation, decline of mechanical properties of materials is delayed, the oxidation corrosion degree of a sealing face is reduced, valve body deformation is avoided, the service life of equipment is prolonged, the influence of equipment faults on production continuity is reduced, and the production efficiency is improved. And the all-directional power-assisted shaft furnace ironmaking is stable and efficient in production.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal smelting, and particularly relates to a water-cooled airtight plug valve driven by a rotary cylinder and a using method thereof. Background Art

[0002] As an efficient and energy-saving smelting process, the stable operation of the core equipment, i.e., the shaft furnace, in shaft furnace ironmaking is crucial for production continuity. The equalizing valve, as a key component in the shaft furnace system, undertakes the important function of isolating the shaft furnace body from upstream and downstream equipment. Specifically, this valve is installed in the air flow passage between the shaft furnace and the charging equalizing bin above and the cooler buffer tank below. By quickly cutting off or conducting the air flow, it provides a safe isolation environment for on-line maintenance of the equipment.

[0003] The currently mainstream equalizing valves adopt a metal hard seal structure, and rely on the direct contact between the precision-machined plug body and the valve body to achieve sealing. This traditional design has significant defects: First, the metal contact seal depends on high-precision machining, and is prone to thermal deformation in a high-temperature environment, resulting in an increase in the mating clearance and causing leakage; Second, the wear of the sealing pair intensifies with the increase in the number of opening and closing operations, and the maintenance cost is high after damage; Third, due to the large sealing resistance, the drive system needs to be equipped with a high-power hydraulic device, which not only increases equipment investment but also leads to an increase in energy consumption.

[0004] In addition, the existing equalizing valves generally lack an effective cooling system. During continuous production, the valve body is in a high-temperature environment for a long time, resulting in a decline in the mechanical properties of the material and an aggravation of the oxidation and corrosion of the sealing surface. This situation not only affects the sealing performance, but is more likely to cause deformation of the valve body, resulting in failures, seriously restricting production efficiency.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art, and provide a water-cooled airtight plug valve driven by a rotary cylinder and a using method thereof.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] On the one hand, the present invention provides a water-cooled airtight plug valve driven by a rotating cylinder, comprising a box body, the box body includes an upper sealing seat, a lower sealing seat, and a plug shaft disposed between the upper sealing seat and the lower sealing seat and capable of rotating under an external force. The plug shaft is in clearance fit with the upper sealing seat and the lower sealing seat respectively. The plug shaft is provided with ventilation holes respectively communicating with the upper sealing seat and the lower sealing seat, and two sealing rings respectively at 90 degrees to the ventilation holes. The sealing rings can be hermetically connected with the upper sealing seat and the lower sealing seat through the rotation of the plug shaft; valve covers and valve caps are respectively fixedly provided at both ends of the box body. One end of the plug shaft is rotatably connected with the valve cover, and the other end is rotatably connected with the valve cap. An inner side of an end face of the box body fixedly connected with the valve cap is provided with a water tank for cooling the plug valve. The box body is also provided with a water inlet and a water outlet communicating with the water tank; the box body and the valve cover are fixedly connected by bolts.

[0009] Specifically, two annular grooves for fixing the sealing rings are provided on the plug shaft, and the annular grooves are respectively adapted to the shapes of the upper sealing seat and the lower sealing seat.

[0010] Specifically, the sealing rings are made of high-temperature resistant silica gel.

[0011] Specifically, the valve cover and the plug shaft are connected through a first shaft sleeve, and the valve cover is provided with a first stop for limiting the first shaft sleeve.

[0012] Further, a first bearing is provided between the first shaft sleeve and the plug shaft. The first shaft sleeve is provided with a second stop for positioning the outer ring of the first bearing, and the plug shaft is in interference fit with the inner ring of the first bearing.

[0013] Specifically, a bracket is also fixedly provided on a side of the valve cover away from the box body. The bracket is fixedly provided with a support rod for fixing the rotating cylinder. The support rod is perpendicular to the axis of the plug shaft. One end of the rotating cylinder is hinged to the support rod, and the other end is fixedly connected to the plug shaft through an operating rod. The operating rod is hinged to one end of the rotating cylinder.

[0014] Specifically, the operating rod is provided with a hole adapted to the plug shaft, and the plug shaft is fixedly connected to the operating rod through a key.

[0015] Specifically, one end of the plug shaft is rotatably connected to the valve cap through a second shaft sleeve. The second shaft sleeve is rotatably connected to the plug shaft through a second bearing. The box body is provided with a third stop for positioning the second shaft sleeve and is fixedly connected to the second shaft sleeve through bolts. One end of the second shaft sleeve is fixedly connected to the valve cap through bolts, and the other end extends into the box body and is circumferentially sleeved with a water baffle on the outer periphery. The inner circle of the water baffle is in interference fit with the second shaft sleeve, and the outer circle is in interference fit with the box body. The water baffle forms a water tank between the box body and the second shaft sleeve respectively;

[0016] It should be noted that one end of the box body close to the valve cap is a reduced diameter structure, which is convenient for fixed connection with the second shaft sleeve.

[0017] Specifically, the water inlet and the water outlet are arranged on the end face of one end of the box body. The water outlet is arranged at a position close to the upper sealing seat, and the water inlet is arranged at a position close to the lower sealing seat.

[0018] On the other hand, the present invention provides a method for using a water-cooled airtight plug valve driven by a rotary cylinder, which is as follows:

[0019] When the equipment is working, the vent hole corresponds exactly to the positions of the upper sealing seat and the lower sealing seat. At this time, the plug valve is in a venting state;

[0020] When the equipment needs to be overhauled, the equipment stops working. The rotary cylinder is controlled to shorten, so that the operating rod drives the plug shaft to rotate, and further drives the sealing ring to rotate until the sealing ring rotates to the corresponding positions of the upper sealing seat and the lower sealing seat respectively. At this time, the plug valve is in a sealed state, and then the equipment starts to be overhauled;

[0021] After the equipment overhaul is completed, the rotary cylinder is controlled to extend, so that the operating rod drives the plug shaft to rotate in the opposite direction, and further drives the sealing ring to rotate until the vent hole rotates to the corresponding positions of the upper sealing seat and the lower sealing seat respectively. At this time, the plug valve is in a venting state, and then the equipment starts the next step of work;

[0022] When the equipment is being overhauled or working, cooling water is continuously introduced into the water tank to cool the plug valve.

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] Aiming at the many problems exposed by the traditional pressure equalizing valve in the application of shaft furnace ironmaking, the present invention shows significant advantages, which are as follows:

[0025] 1. In terms of structure and transmission, the plug valve of the present invention has the advantages of simple structure, small volume, rapid opening and closing, long service life, and convenient maintenance. The plug shaft is directly driven to rotate by the rotary cylinder and the operating rod, abandoning the hinge points of the connecting rod mechanism, realizing rapid opening and closing, and effectively improving the overhaul efficiency;

[0026] 2. In terms of sealing performance, by setting a sealing ring on the plug shaft, the problems of thermal deformation and wear of traditional metal hard seals are overcome, the leakage risk is greatly reduced, and the high maintenance cost caused by seal failure is reduced;

[0027] 3. At the level of the cooling system, the present invention equips the plug valve with a cooling system to ensure that the valve body maintains a relatively low temperature during continuous operation, delays the decline of the mechanical properties of the material, reduces the degree of oxidation and corrosion of the sealing surface, and avoids deformation of the valve body. This not only extends the service life of the equipment but also reduces the impact of equipment failures on production continuity, comprehensively assisting the stable and efficient production of shaft furnace ironmaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principles of the present invention.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 is the front view of the present invention;

[0031] Figure 2 is Figure 1 the sectional view taken along the line A-A of

[0032] Figure 3 is Figure 1 the top view of

[0033] Wherein: 1 is the box body; 2 is the rotary cylinder; 3 is the operating rod; 4 is the key; 5 is the first bearing; 6 is the plug shaft; 7 is the sealing ring; 8 is the bracket; 9 is the fastening bolt; 10 is the water tank; 11 is the support rod; 12 is the water inlet; 13 is the water outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are only examples consistent with some aspects of the present invention detailed in the appended claims.

[0035] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Embodiment

[0037] See Figures 1-3As shown in the figure, this embodiment provides a water-cooled airtight plug valve driven by a rotary cylinder, which includes a box body 1. The box body 1 includes an upper sealing seat, a lower sealing seat, and a plug shaft 6 disposed between the upper sealing seat and the lower sealing seat and capable of rotating under an external force. The plug shaft 6 is in clearance fit with the upper sealing seat and the lower sealing seat respectively. The plug shaft 6 is provided with vent holes respectively communicating with the upper sealing seat and the lower sealing seat, and two sealing rings 7 respectively at 90 degrees to the vent holes. The sealing rings 7 can be hermetically connected to the upper sealing seat and the lower sealing seat through the rotation of the plug shaft 6; valve covers and valve caps are respectively fixedly provided at both ends of the box body 1. One end of the plug shaft 6 is rotatably connected to the valve cover, and the other end is rotatably connected to the valve cap. An inner side of an end face of the box body 1 fixedly connected to the valve cap is provided with a water tank 10 for cooling the plug valve. The box body 1 is also provided with a water inlet 12 and a water outlet 13 communicating with the water tank 10; the box body 1 and the valve cover are fixedly connected by bolts.

[0038] Specifically, two annular grooves for fixedly arranging the sealing rings 7 are formed on the plug shaft 6, and the annular grooves are respectively adapted to the shapes of the upper sealing seat and the lower sealing seat.

[0039] Specifically, the material of the sealing ring 7 is high-temperature resistant silica gel.

[0040] Specifically, the valve cover and the plug shaft 6 are connected through a first shaft sleeve, and the valve cover is provided with a first stop for limiting the first shaft sleeve.

[0041] Furthermore, a first bearing 5 is arranged between the first shaft sleeve and the plug shaft 6. The first shaft sleeve is provided with a second stop for positioning the outer ring of the first bearing 5, and the plug shaft 6 is in interference fit with the inner ring of the first bearing 5.

[0042] Specifically, a bracket 8 is fixedly provided on a side of the valve cover away from the box body 1 by a fastening bolt 9. The bracket 8 is fixedly provided with a support rod 11 for fixing the rotary cylinder 2. The support rod 11 is perpendicular to the axis of the plug shaft 6. One end of the rotary cylinder 2 is hinged to the support rod 11, and the other end is fixedly connected to the plug shaft 6 through an operating rod 3. The operating rod 3 is hinged to one end of the rotary cylinder 2.

[0043] Specifically, the operating rod 3 is provided with a hole adapted to the plug shaft 6, and the plug shaft 6 is fixedly connected to the operating rod 3 through a key 4.

[0044] Specifically, one end of the plug shaft 6 is rotatably connected to the valve cap through a second shaft sleeve. The second shaft sleeve is rotatably connected to the plug shaft 6 through a second bearing. The box body 1 is provided with a third stop for positioning the second shaft sleeve and is fixedly connected to the second shaft sleeve by bolts. One end of the second shaft sleeve is fixedly connected to the valve cap by bolts, and the other end extends into the box body 1 and is sleeved with a water baffle on the outer circumference. The inner circle of the water baffle is in interference fit with the second shaft sleeve, and the outer circle is in interference fit with the box body 1. Water troughs 10 are formed between the water baffle and the box body 1 and the second shaft sleeve respectively;

[0045] It should be noted that one end of the box body 1 close to the valve cap is of a reduced opening structure, which is convenient for fixedly connecting with the second shaft sleeve.

[0046] Specifically, the water inlet 12 and the water outlet 13 are arranged on the end face of one end of the box body 1. The water outlet 13 is arranged at a position close to the upper sealing seat, and the water inlet 12 is arranged at a position close to the lower sealing seat.

[0047] The present embodiment provides a method for using a water-cooled airtight plug valve driven by a rotary cylinder, which is specifically as follows:

[0048] When the equipment is working, the vent hole is completely corresponding to the positions of the upper sealing seat and the lower sealing seat. At this time, the plug valve is in a venting state;

[0049] When the equipment needs to be overhauled, the equipment stops working. The rotary cylinder 2 is controlled to shorten, so that the operating rod 3 drives the plug shaft 6 to rotate, and further drives the sealing ring 7 to rotate until the sealing ring 7 rotates to the corresponding positions of the upper sealing seat and the lower sealing seat respectively. At this time, the plug valve is in a sealed state, and then the equipment starts to be overhauled;

[0050] After the equipment overhaul is completed, the rotary cylinder 2 is controlled to extend, so that the operating rod 3 drives the plug shaft 6 to rotate in the opposite direction, and further drives the sealing ring 7 to rotate until the vent hole rotates to the corresponding positions of the upper sealing seat and the lower sealing seat respectively. At this time, the plug valve is in a venting state, and then the equipment starts the next step of work;

[0051] When the equipment is overhauled or working, cooling water is continuously introduced into the water troughs 10 to cool the plug valve.

[0052] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0053] It should be understood that the present invention is not limited to the above-described content and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A water-cooled airtight plug valve driven by a rotary cylinder, characterized in that: The invention comprises a housing (1), wherein the housing (1) comprises an upper sealing seat, a lower sealing seat and a plug shaft (6) arranged between the upper sealing seat and the lower sealing seat and capable of rotating under external force, the plug shaft (6) respectively cooperates with the upper sealing seat and the lower sealing seat in a clearance, the plug shaft (6) is provided with ventilation holes respectively connected with the upper sealing seat and the lower sealing seat, and two sealing rings (7) respectively 90 degrees to the ventilation holes, the sealing rings (7) can be sealedly connected with the upper sealing seat and the lower sealing seat by rotating the plug shaft (6); a valve cover and a valve bonnet are respectively fixedly provided at both ends of the housing (1), one end of the plug shaft (6) is rotationally connected with the valve cover, and the other end is rotationally connected with the valve bonnet, a water tank (10) for cooling the plug valve is provided on the inner side of the end surface of one end of the housing (1) fixedly connected with the valve bonnet, and the housing (1) is also provided with a water inlet (12) and a water outlet (13) connected with the water tank (10).

2. The water-cooled airtight plug valve according to claim 1, characterized in that: The plug shaft (6) is provided with two annular grooves for fixing a sealing ring (7), and the annular grooves are respectively adapted to the shapes of the upper sealing seat and the lower sealing seat.

3. The water-cooled airtight plug valve according to claim 1, characterized in that: The sealing ring (7) is made of high temperature resistant silicone.

4. The water-cooled airtight plug valve according to claim 1, characterized in that: The valve cover is connected to the plug shaft (6) via a first shaft sleeve, and the valve cover is provided with a first stop for limiting the first shaft sleeve.

5. The water-cooled airtight plug valve according to claim 4, characterized in that: A first bearing (5) is arranged between the first sleeve and the plug shaft (6); the first sleeve is provided with a second stopper for positioning the outer ring of the first bearing (5); the plug shaft (6) and the inner ring of the first bearing (5) are interference fit.

6. The water-cooled airtight plug valve according to claim 1, characterized in that: A bracket (8) is also fixedly provided on the side of the valve cover away from the box body (1), and the bracket (8) is fixedly provided with a support rod (11) for fixing the rotary cylinder (2), and the support rod (11) is perpendicular to the axis of the plug shaft (6). One end of the rotary cylinder (2) is hinged to the support rod (11), and the other end is fixedly connected to the plug shaft (6) through an operating rod (3), and the operating rod (3) is hinged to one end of the rotary cylinder (2).

7. The water-cooled airtight plug valve according to claim 1, characterized in that: The operating rod (3) is provided with a hole matched with the cock shaft (6), and the cock shaft (6) is fixedly connected to the operating rod (3) via a key (4).

8. The water-cooled airtight plug valve according to claim 1, characterized in that: One end of the plug shaft (6) is rotatably connected to the valve cap via a second sleeve, and the second sleeve is rotatably connected to the plug shaft (6) via a second bearing. The housing (1) is provided with a third stopper for positioning the second sleeve and is fixedly connected to the second sleeve. One end of the second sleeve is fixedly connected to the valve cap, and the other end extends into the housing (1) and is provided with a water baffle plate on the outer circumference. The inner circle of the water baffle plate is interference fit with the second sleeve, and the outer circle is interference fit with the housing (1). A water trough (10) is formed between the water baffle plate and the housing (1) and the second sleeve.

9. The water-cooled airtight plug valve according to claim 1, characterized in that: The water inlet (12) and the water outlet (13) are arranged on the end surface of one end of the box body (1), the water outlet (13) is arranged at a position close to the upper sealing seat, and the water inlet (12) is arranged at a position close to the lower sealing seat.

10. The method for using the water-cooled airtight plug valve according to any one of claims 1 to 9, characterized in that: The details are as follows: When the equipment is working, the vent hole completely corresponds to the position of the upper sealing seat and the lower sealing seat, and the plug valve is in a ventilated state at this time; When the equipment needs to be repaired, the equipment stops working, the plug shaft (6) is forced to rotate, driving the sealing ring (7) to rotate until the sealing ring (7) rotates to the corresponding positions with the upper sealing seat and the lower sealing seat respectively. At this time, the plug valve is in a sealed state, and the equipment is repaired; When the equipment is overhauled, the plug shaft (6) is rotated by the reverse force, driving the sealing ring (7) to rotate until the vent hole rotates to the corresponding position with the upper sealing seat and the lower sealing seat respectively. At this time, the plug valve is in the venting state, and the equipment starts the next step of work; When the equipment is under maintenance or in operation, cooling water is continuously introduced into the water tank (10) to cool the stopcock.

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