Sealed stop valve for iron-making shaft furnace

Abstract

The utility model discloses a material stop valve with a seal for an iron-making shaft furnace, and relates to the field of valves. The box body is of a hollow structure with two open ends, and a first annular groove is formed in the top; the valve seat is fixedly embedded in the first annular groove, and a through hole is formed in the top of the valve seat and communicates with the hollow structure. The spherical valve element is rotatably arranged in the hollow structure, a through circulation channel is formed in the spherical valve element, and the driving mechanism penetrates through the side wall of the box body and is connected to the spherical valve element; the sealing ring is arranged between the contact surfaces of the valve seat and the spherical valve core; a gas path pipeline is arranged in the valve seat, the gas inlet end of the gas path pipeline is connected to an external gas source connector, and the gas outlet end is communicated to the sealing ring. By actively controlling the pressure charging and releasing state of the sealing ring, gas in the iron-making shaft furnace is effectively isolated. According to the integrated design, the equipment size is reduced so as to adapt to the urgent requirements of the iron-making shaft furnace on space compactness and high operation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a sealing cut-off valve for iron-making shaft furnace. BACKGROUND

[0002] In the material conveying system of iron-making shaft furnace, in order to meet the dual requirements of cutting off the furnace material flow path and sealing the high-pressure gas in the furnace, the industry generally uses a combined cut-off valve. The structure adopts a split design, which is composed of an independently arranged material gate unit and a sealing valve unit stacked one above the other: the material gate unit includes a shell and a hydraulic oil cylinder driving mechanism, guides the material through the funnel-shaped guide structure in the shell, and controls the horizontal reciprocating movement of the gate plate by a connecting rod mechanism to realize physical cut-off; the sealing valve unit is separately arranged below the material gate unit, and an annular valve seat is arranged in the shell, and another set of hydraulic driving system drives the valve plate to rotate to realize the sealing of the valve seat to block the gas flow. However, this split structure results in an excessively large axial size of the equipment, occupying the limited space at the lower part of the shaft furnace, and it is difficult to meet the technical requirements of modern iron-making process for compactness and high efficiency. CONTENT OF THE UTILITY MODEL

[0003] The embodiment of the present application provides a sealing cut-off valve for iron-making shaft furnace, which solves the problems in the background art.

[0004] The sealing cut-off valve for iron-making shaft furnace provided by the embodiment of the present application comprises a box body, a valve seat, a spherical valve core, a sealing ring and a driving mechanism; the box body is a hollow structure with open ends, and a first annular groove is arranged at the top; the valve seat is fixedly embedded in the first annular groove, and a through hole is arranged at the top, which is communicated with the hollow structure; the spherical valve core is rotatably arranged in the hollow structure, and a through flow channel is arranged inside; the driving mechanism penetrates through the side wall of the box body and is connected to the spherical valve core to drive the rotation of the spherical valve core; when the through flow channel is coaxially aligned with the through hole of the valve seat, the cut-off valve is opened; the sealing ring is arranged between the contact surface of the valve seat and the spherical valve core; a gas path pipeline is arranged in the valve seat, the gas inlet end of the gas path pipeline is connected to an external gas source interface, and the gas outlet end is communicated to the sealing ring; when the cut-off valve is closed, the gas path pipeline inflates the sealing ring to make it expand and press the spherical valve core tightly to realize the gas flow sealing; when the cut-off valve is opened, the gas path pipeline depressurizes the sealing ring to make it shrink and disengage from the spherical valve core.

[0005] In a possible implementation, the sealing cut-off valve for the iron-making shaft furnace further comprises a pressure ring; a second annular groove is arranged at the bottom of the valve seat; the pressure ring is arranged between the first annular groove and the second annular groove, and a side of the pressure ring facing the spherical valve core abuts against the spherical valve core; a third annular groove is arranged at the top of the pressure ring; the sealing ring is embedded between the second annular groove of the valve seat and the third annular groove of the pressure ring and is tightly fixed by the pressure ring.

[0006] In a possible implementation, the sealing cut-off valve for the iron-making shaft furnace further comprises a wear-resistant sleeve; the wear-resistant sleeve is arranged on the inner wall of the through hole; when the flow channel is aligned with the wear-resistant sleeve, the cut-off valve is opened.

[0007] In a possible implementation, the sealing cut-off valve for the iron-making shaft furnace further comprises a support part; the support part is symmetrically arranged on a side of the spherical valve core away from the driving mechanism, and is used for balancing the unbalanced moment generated when the spherical valve core rotates.

[0008] In a possible implementation, the driving mechanism is a swing hydraulic cylinder, a first water cooling channel is arranged in the driving shaft, a second water cooling channel is arranged in the support part, an annular cooling cavity is formed between the outer wall of the flow channel and the spherical valve core, two ends of the annular cooling cavity are respectively communicated with the first water cooling channel and the second water cooling channel, and a rotary joint is arranged at an end of the driving shaft away from the spherical valve core and an end of the support part away from the spherical valve core.

[0009] In a possible implementation, the sealing cut-off valve for the iron-making shaft furnace further comprises an outer shell; the outer shell is coaxially sleeved on the outside of the box body and forms a cooling sandwich with the outer wall of the box body; the top and bottom of the outer shell are fixedly connected to the top wall and the bottom wall of the box body respectively; the outer wall of the outer shell is provided with a water inlet and a water outlet, and cooling water flows into the cooling sandwich through the water inlet and is discharged through the water outlet.

[0010] In a possible implementation, the inside of the valve seat is provided with an annular water cooling groove; a partition plate is arranged in the annular water cooling groove, and the annular water cooling groove is divided into a water inlet cavity and a water outlet cavity; the outer wall of the valve seat is provided with a water inlet interface and a water outlet interface, which are respectively communicated with the water inlet cavity and the water outlet cavity.

[0011] The one or more technical solutions provided in the embodiments have at least the following technical effects:

[0012] The working principle of the sealing cut-off valve for the iron-making shaft furnace provided in the application is as follows: closing process: the driving mechanism drives the spherical valve core to rotate, so that the flow passage of the spherical valve core deviates from the through hole of the valve seat, and the material flow path is blocked; at the same time, the external air source inflates the sealing ring through the air path pipeline of the valve seat, so that the sealing ring expands and tightly presses the spherical surface of the spherical valve core, forming a reliable air flow seal and effectively preventing the high-pressure gas in the iron-making shaft furnace from leaking. Opening process: the air path pipeline first depressurizes the sealing ring, so that the sealing ring shrinks and is separated from the spherical valve core; then, the driving mechanism drives the spherical valve core to rotate by 90 degrees, so that the flow passage of the spherical valve core is aligned with the through hole of the valve seat again, and smooth discharging is realized. The application innovatively integrates the functions of material cutting and high-pressure gas sealing in a single compact valve body. By actively controlling the inflation and deflation state of the sealing ring, the gas in the iron-making shaft furnace is effectively isolated; the deflation before opening reduces the friction and wear between the sealing ring and the spherical valve core, prolongs the service life of the sealing ring and the valve as a whole, and ensures smooth and low-resistance opening and closing of the valve. Most importantly, the integrated design eliminates the problem of large axial size and space occupation caused by the traditional split type (material gate unit + sealing valve unit stacked up and down) scheme, greatly reduces the equipment volume, and meets the urgent needs of space compactness and operation efficiency of the iron-making shaft furnace. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the description of the embodiments of the application will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0014] Figure 1 The structural schematic diagram of the sealing cut-off valve for the iron-making shaft furnace provided in the embodiments of the application is shown in the figure.

[0015] Figure 2 The top view of the sealing cut-off valve for the iron-making shaft furnace provided in the embodiments of the application is shown in the figure. Figure 1 The top view of the sealing cut-off valve for the iron-making shaft furnace provided in the embodiments of the application is shown in the figure.

[0016] Figure 3 The structural schematic diagram of the box provided in the embodiments of the application is shown in the figure.

[0017] Figure 4 The structural schematic diagram of the pressure ring provided in the embodiments of the application is shown in the figure.

[0018] Figure: 1 - box; 2 - valve seat; 21 - through hole; 22 - air path pipeline; 23 - partition plate; 24 - water inlet interface; 25 - water outlet interface; 3 - spherical valve core; 31 - flow-through channel; 32 - annular cooling cavity; 4 - sealing ring; 5 - driving mechanism; 51 - driving shaft; 511 - first water cooling channel; 6 - support part; 61 - second water cooling channel; 7 - wear-resistant sleeve; 8 - press ring; 9 - shell; 91 - cooling interlayer; 92 - water inlet; 93 - water outlet; 10 - rotary joint. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0020] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0021] The embodiments of the present application provide a sealing cut-off valve for ironmaking shaft furnace, such as Figures 1 to 4As shown. This sealed shut-off valve for an ironmaking shaft furnace comprises a housing 1, a valve seat 2, a spherical valve core 3, a sealing ring 4, and a drive mechanism 5. The housing 1 is a hollow structure with openings at both ends and a first annular groove at the top. The valve seat 2 is fixedly mounted in the first annular groove and has a through-hole 21 at the top, which communicates with the hollow structure. The spherical valve core 3 is rotatably disposed within the hollow structure and has a through-flow passage 31 extending therethrough. The drive mechanism 5 extends through the side wall of the housing 1 and is connected to the spherical valve core 3, driving the rotation of the spherical valve core 3. When the flow passage 31 is coaxially aligned with the through-hole 21 of the valve seat 2, the shut-off valve is in the open state, allowing material to pass smoothly. The sealing ring 4 is disposed between the contact surfaces of the valve seat 2 and the spherical valve core 3. An air conduit 22 is disposed within the valve seat 2. The air inlet end of the air conduit 22 is connected to the external air source interface, and the air outlet end is connected to the sealing ring 4.

[0022] It should be noted that the working principle of the sealed shut-off valve for the ironmaking vertical furnace is as follows: Closing process: the driving mechanism 5 drives the spherical valve core 3 to rotate, causing its flow channel 31 to deviate from the through hole 21 of the valve seat 2, thereby blocking the material flow path; at the same time, the external gas source inflates the sealing ring 4 through the gas pipeline 22 of the valve seat 2, causing it to expand and tightly press the spherical surface of the spherical valve core 3, forming a reliable airflow seal, effectively preventing the leakage of high-pressure gas in the ironmaking vertical furnace. Opening process: the gas pipeline 22 first relieves the pressure on the sealing ring 4, causing it to shrink and disengage from the spherical valve core 3; then, the driving mechanism 5 drives the spherical valve core 3 to rotate 90 degrees, causing its flow channel 31 to be realigned with the through hole 21 of the valve seat 2, thereby achieving smooth material discharge. The present application innovatively integrates the dual functions of material cutoff and high-pressure gas sealing into a single compact valve body. By actively controlling the pressure and release states of seal ring 4, the gas within the ironmaking shaft furnace is effectively isolated. The pre-opening pressure release reduces friction and wear between seal ring 4 and the spherical valve core 3, extending the service life of the seal ring 4 and the valve as a whole, while ensuring smooth, low-resistance valve opening and closing. Crucially, this integrated design eliminates the significant axial size and space requirements associated with traditional split-type solutions (a stacked material gate unit and sealing valve unit), significantly reducing the equipment size to meet the urgent demand for compact space and efficient operation in ironmaking shaft furnaces.

[0023] In the embodiment of the present application, the sealed shut-off valve for the ironmaking vertical furnace further includes a pressure ring 8. A second annular groove is provided at the bottom of the valve seat 2. The pressure ring 8 is arranged between the first annular groove of the housing 1 and the second annular groove of the valve seat 2, and the side thereof facing the spherical valve core 3 abuts against the spherical valve core 3. A third annular groove is provided at the top of the pressure ring 8. The sealing ring 4 is embedded between the second annular groove of the valve seat 2 and the third annular groove of the pressure ring 8, and is pressed and fixed by the pressure ring 8.

[0024] It should be noted that the pressure ring 8 forms a stable support by being embedded between the second annular groove of the valve seat 2 and the first annular groove of the box body 1. The third annular groove on its top and the second annular groove of the valve seat 2 together constitute a precise positioning cavity for the sealing ring 4, so that the sealing ring 4 is evenly pressurized when inflated, greatly improving the fit of the sealing surface.

[0025] In the embodiment of the present application, the sealed shut-off valve for the ironmaking shaft furnace further includes a wear-resistant sleeve 7. The wear-resistant sleeve 7 is arranged on the inner wall of the through hole 21. When the flow channel 31 is aligned with the wear-resistant sleeve 7, the shut-off valve is opened.

[0026] Furthermore, the wear-resistant sleeve 7, the outer surface of the spherical valve core 3, and the inner wall of its internal flow channel 31 are all subjected to a hardfacing treatment using wear-resistant cemented carbide. This process enhances the wear resistance of these key contact components, effectively resisting the erosion and wear of high-speed dust-laden materials, thereby significantly extending the service life of the entire shut-off valve.

[0027] In the embodiment of the present application, the sealed shut-off valve for an ironmaking shaft furnace further includes a support portion 6. The support portion 6 is symmetrically disposed on the side of the spherical valve core 3 away from the drive mechanism 5 and is used to balance the eccentric load torque generated when the spherical valve core 3 rotates, ensuring smooth operation and reducing vibration and wear.

[0028] In the embodiment of the present application, the drive mechanism 5 is a swing hydraulic cylinder, the drive shaft 51 of which is provided with a first water-cooling channel 511, the support portion 6 is provided with a second water-cooling channel 61, an annular cooling chamber 32 is formed between the outer wall of the circulation channel 31 and the spherical valve core 3, and the two ends of the annular cooling chamber 32 are respectively connected to the first water-cooling channel 511 and the second water-cooling channel 61. The end of the drive shaft 51 away from the spherical valve core 3 and the end of the support portion 6 away from the spherical valve core 3 are both provided with a rotary joint 10. Specifically, the end of the drive shaft 51 extending into the annular cooling chamber 32 is provided with a first connection port, and the first water-cooling channel 511 is connected to the annular cooling chamber 32 through the first connection port. Similarly, the end of the support portion 6 extending into the annular cooling chamber 32 is provided with a second connection port, and the second water-cooling channel 61 is connected to the annular cooling chamber 32 through the second connection port.

[0029] It should be noted that during cooling, pressurized cooling water is injected into the first water-cooling channel 511 from the rotary joint 10 on the drive shaft 51, flows through the annular cooling cavity 32 of the spherical valve core 3, and then enters the second water-cooling channel 61. Finally, it is discharged to the external pipeline through the rotary joint 10 on the support portion 6. This circuit achieves continuous and efficient cooling of the drive shaft 51, support portion 6, and spherical valve core 3 of the drive mechanism 5, effectively coping with high-temperature environments.

[0030] In the embodiment of the present application, the sealing cut-off valve for the iron-making shaft furnace further comprises an outer shell 9. The outer shell 9 is coaxially sleeved outside the box body 1 and forms a cooling interlayer 91 with the outer wall of the box body 1. The top and bottom of the outer shell 9 are fixedly connected to the top wall and the bottom wall of the box body 1 respectively. The outer wall of the outer shell 9 is provided with a water inlet 92 and a water outlet 93. The cooling water flows into the cooling interlayer 91 through the water inlet 92, flows around the box body 1 to absorb heat, and is then discharged through the water outlet 93, thereby effectively cooling the box body 1, protecting the structure of the box body 1 and reducing the internal environment temperature.

[0031] In the embodiment of the present application, the inner part of the valve seat 2 is provided with an annular water cooling groove. A partition plate 23 is arranged in the annular water cooling groove to divide the annular water cooling groove into a water inlet cavity and a water outlet cavity. The outer wall of the valve seat 2 is provided with a water inlet interface 24 and a water outlet interface 25, which are connected to the water inlet cavity and the water outlet cavity respectively. The cooling water enters the water inlet cavity through the water inlet interface 24 of the valve seat 2, flows along the annular water cooling groove under the guidance of the partition plate 23, flows into the water outlet cavity after absorbing the heat of the valve seat 2, and is finally discharged through the water outlet interface 25 of the valve seat 2. This design achieves the cooling of the valve seat 2.

[0032] In summary, the cut-off valve can effectively cool the key components such as the driving mechanism 5, the spherical valve core 3, the box body 1 and the valve seat 2. This makes the cut-off valve stable and suitable for the extreme working environment of the higher temperature at the bottom of the iron-making shaft furnace, and improves the reliability and service life of the equipment under high temperature and high pressure working conditions.

[0033] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0034] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents. The modification or replacement does not change the essence of the corresponding technical solution out of the scope of the technical solutions of the present application.

Claims

1. A sealed shut-off valve for an ironmaking shaft furnace, characterized in that: It comprises a housing (1), a valve seat (2), a spherical valve core (3), a sealing ring (4) and a driving mechanism (5); The box body (1) is a hollow structure with openings at both ends, and a first annular groove is provided on the top; The valve seat (2) is fixedly embedded in the first annular groove, and a through hole (21) is provided on the top, and the through hole (21) is connected to the hollow structure; The spherical valve core (3) is rotatably arranged in the hollow structure, and a through-flow channel (31) is provided inside the hollow structure. The driving mechanism (5) passes through the side wall of the box body (1) and is connected to the spherical valve core (3) for driving the spherical valve core (3) to rotate. When the through-flow channel (31) is coaxially aligned with the through hole (21) of the valve seat (2), the shut-off valve is opened. The sealing ring (4) is arranged between the contact surface of the valve seat (2) and the spherical valve core (3); An air conduit (22) is provided in the valve seat (2), the air inlet end of the air conduit (22) is connected to the external air source interface, and the air outlet end is connected to the sealing ring (4); when the shut-off valve is closed, the air conduit (22) inflates the sealing ring (4) to expand it and press the spherical valve core (3) to achieve airflow sealing; when the shut-off valve is opened, the air conduit (22) relieves pressure on the sealing ring (4) to cause it to shrink and break away from contact with the spherical valve core (3).

2. The sealed shut-off valve for an ironmaking shaft furnace according to claim 1, characterized in that: Also includes a pressure ring (8); The bottom of the valve seat (2) is provided with a second annular groove; the pressure ring (8) is provided between the first annular groove and the second annular groove, and the side thereof facing the spherical valve core (3) abuts against the spherical valve core (3); the top of the pressure ring (8) is provided with a third annular groove; The sealing ring (4) is embedded between the second annular groove of the valve seat (2) and the third annular groove of the pressure ring (8), and is pressed and fixed by the pressure ring (8).

3. The sealed shut-off valve for an ironmaking shaft furnace according to claim 1, characterized in that: Also includes a wear-resistant sleeve (7); The wear-resistant sleeve (7) is arranged on the inner wall of the through hole (21); when the circulation channel (31) is aligned with the wear-resistant sleeve (7), the cut-off valve is opened.

4. The sealed shut-off valve for an ironmaking shaft furnace according to claim 1, characterized in that: Also includes a support portion (6); The support portion (6) is symmetrically arranged on a side of the spherical valve core (3) away from the driving mechanism (5), and is used to balance the eccentric load moment generated when the spherical valve core (3) rotates.

5. The sealed shut-off valve for an ironmaking shaft furnace according to claim 4, characterized in that: The driving mechanism (5) is a swing hydraulic cylinder, wherein a first water cooling channel (511) is provided inside the driving shaft (51), and a second water cooling channel (61) is provided on the supporting portion (6). An annular cooling cavity (32) is formed between the outer wall of the circulation channel (31) and the spherical valve core (3), and the two ends of the annular cooling cavity (32) are respectively connected to the first water cooling channel (511) and the second water cooling channel (61). A rotary joint (10) is provided at one end of the driving shaft (51) away from the spherical valve core (3) and at one end of the supporting portion (6) away from the spherical valve core (3).

6. The sealed shut-off valve for an ironmaking shaft furnace according to claim 1, characterized in that: Also includes a housing (9); The outer shell (9) is coaxially sleeved on the outside of the box body (1) and forms a cooling interlayer (91) with the outer wall of the box body (1); the top and bottom of the outer shell (9) are respectively fixedly connected to the top wall and bottom wall of the box body (1); The outer wall of the shell (9) is provided with a water inlet (92) and a water outlet (93); cooling water flows into the cooling interlayer (91) through the water inlet (92) and is then discharged through the water outlet (93).

7. The sealed shut-off valve for an ironmaking shaft furnace according to claim 1, characterized in that: An annular water cooling groove is provided inside the valve seat (2); A partition plate (23) is provided in the annular water cooling groove to divide the annular water cooling groove into a water inlet cavity and a water outlet cavity; The outer wall of the valve seat (2) is provided with a water inlet interface (24) and a water outlet interface (25), which are respectively connected to the water inlet cavity and the water outlet cavity.

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