Combination valve and blast furnace ironmaking equipment

Abstract

The utility model relates to the technical field of metallurgical equipment, and provides a combination valve and blast furnace ironmaking equipment. The combination valve comprises a valve box body, a cylindrical valve clack assembly and a valve clack driving assembly, wherein the cylindrical valve clack assembly is mounted in the valve box body; the cylindrical valve clack assembly comprises a first valve clack and a second valve clack; the valve clack driving assembly is arranged on one side outside the valve box body and comprises a first rotating shaft connected with the first valve clack, a second rotating shaft connected with the second valve clack, a first gear, a second gear, a third gear, a first crank and a first driving piece. The first driving part is connected with the first rotating shaft through the first crank, the first gear sleeves the first rotating shaft, the second gear sleeves the second rotating shaft, the third gear is externally meshed with the first gear and the second gear, and the first gear and the second gear are identical in parameter. The utility model ensures the real-time symmetry of the discharge port relative to the center line of the blast furnace, is beneficial to the centered falling of materials, and relieves the deviation of the materials.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical equipment, in particular to a combination valve and blast furnace ironmaking equipment. Background Art

[0002] The combination valve is a very important equipment used in modern blast furnace ironmaking. It can not only seal the high-temperature gas in the blast furnace, but also accurately control the opening angle of the valve disc, thereby controlling the flow of materials through the discharge port, meeting the gas sealing and precise feeding requirements of the blast furnace without bell top. When the valve disc is opened to a certain size, the valve disc cutting edge and the outlet of the feeding bushing work together to form the discharge port. Whether the discharge port is symmetrical relative to the center line of the blast furnace and whether the shape is approximately a regular polygon or a circle are important factors affecting material segregation.

[0003] There is a commonly used combination valve on the market. The valve disc assembly of the material flow regulating part is composed of two spheres of different sizes stacked up and down. A single hydraulic cylinder drives the positive and negative four-bar linkage on the same side to control the valve disc to open to both sides. The characteristics of the positive and negative four-bar linkage determine that the speeds of the two valve discs are different when opening and closing, so that the material cutting edge of the valve disc is approximately symmetrical relative to the center line of the blast furnace only within a specific angle range. If the actual use angle deviates greatly from the design angle, it will cause the material to deviate to one side. Utility Model Content

[0004] The utility model provides a combined valve and blast furnace ironmaking equipment, which are used to solve the problem in the prior art that the two valve flaps of the valve flap assembly have a large offset angle within the opening range, resulting in material deflection.

[0005] The utility model provides a combination valve, comprising: a valve box and a cylindrical valve flap assembly, wherein the cylindrical valve flap assembly is installed in the valve box; the cylindrical valve flap assembly comprises a first valve flap and a second valve flap; a valve flap driving assembly, wherein the valve flap driving assembly is arranged outside the valve box, and the valve flap driving assembly comprises a first rotating shaft connected to the first valve flap, a second rotating shaft connected to the second valve flap, a first gear, a second gear, a third gear, a first crank and a first driving member; the first driving member is connected to the first rotating shaft through the first crank, the first gear is sleeved and connected to the first rotating shaft, the second gear is sleeved and connected to the second rotating shaft, the third gear is respectively meshed with the first gear and the second gear, and the first gear and the second gear have the same parameters.

[0006] According to a combination valve provided by the utility model, it also includes a bearing group, and the bearing group is sleeved on the outer wall surface of the first rotating shaft.

[0007] According to the combined valve provided by the utility model, it also includes a first sealing component, and the outer wall surface of the first rotating shaft and the outer wall surface of the second rotating shaft are both provided with the first sealing component.

[0008] A combination valve provided by the utility model also includes a valve plate, a valve seat and a valve plate driving assembly, wherein the valve plate and the valve seat are both arranged inside the valve box body, and the valve plate driving assembly is arranged outside the valve box body. The valve plate driving assembly is connected to the valve plate and is used to drive the valve plate to move toward or away from the valve seat, and is also used to drive the valve plate to rotate so as to move away from the material outlet.

[0009] According to a combination valve provided by the utility model, the valve plate drive assembly includes a second drive member, a connecting rod and a swing arm, the second drive member is connected to the swing arm through the connecting rod, the swing arm is connected to the valve plate, and the second drive member drives the connecting rod to drive the swing arm and the valve plate to move toward or away from the valve seat.

[0010] According to a combination valve provided by the utility model, the valve plate drive assembly also includes a third drive member, a second crank and a rotating arm, the third drive member is connected to the rotating arm through the second crank, the rotating arm is connected to the swing arm, and the third drive member is used to drive the second crank to drive the rotating arm and the swing arm to rotate.

[0011] According to a combination valve provided by the utility model, the valve plate drive assembly also includes a support seat, a support sleeve and a slewing bearing, the support seat and the support sleeve are both arranged on the outer wall surface of the slewing arm, the slewing bearing is arranged between the slewing arm and the support seat, and the slewing bearing includes a three-row roller slewing bearing and a single-row cross roller slewing bearing.

[0012] According to a combination valve provided by the utility model, it also includes a second sealing component, and the second sealing component is arranged on the outer wall surface of the rotating arm.

[0013] According to a combination valve provided by the utility model, the first driving member, the second driving member and the third driving member are all hydraulic cylinders.

[0014] The utility model also provides a blast furnace ironmaking equipment, comprising the combined valve as described in any one of the above items.

[0015] The combined valve and blast furnace ironmaking equipment provided by the utility model drive the two valve flaps of the cylindrical valve flap assembly to rotate through the valve flap driving assembly. The two valve flaps have the same rotation speed and opposite directions, so that the two valve flaps of the cylindrical valve flap assembly can be opened and closed symmetrically in real time, ensuring that the discharge port is symmetrical with respect to the center line of the blast furnace in real time, which is conducive to the centering of the material and alleviates the deviation of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a front view of the combined valve provided by the utility model;

[0018] Figure 2 The utility model provides Figure 1 Cross-section at AA in the middle;

[0019] Figure 3 This is a front view of the valve disc drive assembly provided by the utility model;

[0020] Figure 4 It is a right side view of the valve disc drive assembly provided by the utility model;

[0021] Figure 5 This is one of the partial cross-sectional views of the valve disc drive assembly provided by the utility model;

[0022] Figure 6 This is the second partial cross-sectional view of the valve disc drive assembly provided by the utility model;

[0023] Figure 7 This is a front view of the valve plate drive assembly provided by the utility model;

[0024] Figure 8 It is a left view of the valve plate drive assembly provided by the utility model;

[0025] Fig. 9 It is a partial cross-sectional view of the valve plate drive assembly provided by the utility model;

[0026] Reference numerals:

[0027] 10. Valve box; 20. Cylindrical valve disc assembly; 30. Blanking bushing;

[0028] 40. Valve disc drive assembly; 41. First rotating shaft; 42. Second rotating shaft; 43. First gear; 44. Second gear; 45. Third gear; 46. First crank; 47. First driving member; 48. Gear box; 49. Bearing assembly;

[0029] 51. first sealing member; 52. second sealing member; 60. valve plate; 70. valve seat;

[0030] 80. Valve plate drive assembly; 81. Second drive member; 82. Connecting rod; 83. Swing arm; 84. Third drive member; 85. Second crank; 86. Swivel arm; 87. Support seat; 88. Support sleeve; 89. Swivel bearing;

[0031] 91. The third sealing member; 92. The fourth sealing member. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are 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.

[0033] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0038] Combine the following Figures 1 to 9 The utility model describes a combined valve and blast furnace ironmaking equipment.

[0039] The combined valve provided in the embodiment of the utility model comprises: a valve box 10, a cylindrical valve flap assembly 20 and a valve flap driving assembly 40. The cylindrical valve flap assembly 20 is installed in the valve box 10. The cylindrical valve flap assembly 20 comprises a first valve flap and a second valve flap. The valve flap drive assembly 40 is arranged on one side outside the valve box body 10, and the valve flap drive assembly 40 includes a first rotating shaft 41 connected to the first valve flap, a second rotating shaft 42 connected to the second valve flap, a first gear 43, a second gear 44, a third gear 45, a first crank 46 and a first driving member 47; the first driving member 47 is connected to the first rotating shaft 41 through the first crank 46, the first gear 43 is sleeved and connected to the first rotating shaft 41, the second gear 44 is sleeved and connected to the second rotating shaft 42, and the third gear 45 is respectively meshed with the first gear 43 and the second gear 44. The first gear 43 and the second gear 44 have the same parameters, and the first gear 43 and the second gear 44 have the same rotation speed and opposite directions, thereby controlling the rotation of the first valve flap and the second valve flap, that is, the first valve flap and the second valve flap have the same rotation speed and opposite directions.

[0040] The cylindrical valve flap assembly 20 includes a first valve flap and a second valve flap, and the first valve flap and the second valve flap are symmetrically arranged. Figure 2As shown. The first valve flap includes a first wear-resistant lining plate, a first steel shell; a first high wear-resistant edge, and a first swing arm; the second valve flap includes a second wear-resistant lining plate, a second steel shell, a second high wear-resistant edge, and a second swing arm; the first wear-resistant lining plate and the second wear-resistant lining plate are partially cylindrical, and the radial cross-section is an arc shape, which can be manufactured as a whole, or divided into several small pieces, spliced ​​and assembled into a partial cylindrical shape; the first steel shell and the second steel shell are also partially cylindrical, and the radial cross-section is an arc shape, which can be manufactured as a whole, or divided into several small pieces, spliced ​​and assembled into a partial cylindrical shape, and the upper surface of the first steel shell fits the lower surface of the first wear-resistant lining plate , and are fixedly connected by bolt connection or welding; the upper surface of the second steel shell is fitted with the lower surface of the second wear-resistant lining, and are fixedly connected by bolt connection or welding; the first swing arm positioning groove and the second swing arm positioning groove are respectively provided on the lower surfaces of the first steel shell and the second steel shell; the middle cross beams of the first swing arm and the second swing arm are respectively embedded in the first swing arm positioning groove and the second swing arm positioning groove, and are fixedly connected by bolts or welding; one or more key grooves are provided at the end of the first swing arm for connecting with the first rotating shaft 41, and one or more key grooves are also provided at the end of the second swing arm for connecting with the second rotating shaft 42.

[0041] The first high wear-resistant cutting edge and the second high wear-resistant cutting edge are partially cylindrical, with a radial cross-section of an arc shape. They are made of highly wear-resistant materials and can be manufactured as a whole or made into several small pieces, which are spliced ​​and assembled into a partial cylindrical shape. The lower surface of the first high wear-resistant cutting edge fits with the upper surface of the front end of the first steel shell, and is fixedly connected by bolting or welding. The lower surface of the second high wear-resistant cutting edge fits with the upper surface of the front end of the second steel shell, and is fixedly connected by bolting or welding. The first swing arm and the second swing arm serve as the bearing base of the first wear-resistant lining, the first steel shell, the first high wear-resistant cutting edge and the second wear-resistant lining, the second steel shell, and the second high wear-resistant cutting edge, and simultaneously bear the weight load of the material.

[0042] The material regulating valve of the utility model embodiment further comprises a material discharge bushing 30, which is installed in the valve box 10. Figure 1 and Figure 2 As shown, the unloading bushing 30 bears the wear and impact of the material, plays the role of collecting the material and protecting other parts from being worn by the material. During the unloading process, the first valve flap and the second valve flap open to both sides to a specified angle, and the cross-section of the unloading bushing 30 and the first wear-resistant cutting edge and the second wear-resistant cutting edge together form an approximate regular polygon, which is conducive to the centering of the material, has a positive effect on alleviating the deviation of the material, and can control the cross-sectional area of ​​the discharge port to achieve control of the material flow rate.

[0043] Further, the valve disc drive assembly 40 is installed on one side outside the valve box 10, and the valve disc drive assembly 40 includes a first rotating shaft 41 connected to the first valve disc, that is, the first rotating shaft 41 is connected to the first swing arm on the first valve disc, and a second rotating shaft 42 connected to the second valve disc, that is, the second rotating shaft 42 is connected to the second swing arm on the second valve disc; the first rotating shaft 41 and the second rotating shaft 42 are connected through gears; specifically, refer to Figure 3 and Figure 5 , the end of the first rotating shaft 41 is sleeved and connected with a first gear 43 (such as a bevel gear), the end of the second rotating shaft 42 is sleeved and connected with a second gear 44 (such as a bevel gear), the first gear 43 and the second gear 44 are respectively meshed with the third gear 45 (such as a bevel gear), wherein the parameters of the first gear 43 and the second gear 44 are the same, that is, the number of teeth and the pitch are the same. It should be noted that a gear box 48 is installed outside the valve box 10, and the first gear 43, the second gear 44 and the third gear 45 are all arranged in the gear box 48. In addition, the number of the third gears 45 in the embodiment of the utility model is not specifically limited, and can be one or more, for example, 4.

[0044] The valve flap drive assembly 40 further includes a first drive member 47 and a first crank 46. Figure 4 As shown, one end of the first crank 46 is connected to the first rotating shaft 41, and the other end of the first crank 46 is connected to the first driving member 47. The first driving member 47 is started to drive the first crank 46 to drive the first rotating shaft 41 to rotate. At this time, the first gear 43, the third gear 45, the second gear 44 and the second rotating shaft 42 rotate at the same time and at the same speed. Through the transmission of the torque of the third gear 45, the rotation direction of the second rotating shaft 42 is opposite to that of the first rotating shaft 41, that is, the first valve flap and the second valve flap have the same rotation speed and opposite directions. The first valve flap and the second valve flap are symmetrical relative to the center line of the blast furnace at any angle within the opening range. The cross-section of the discharge bushing 30 and the first wear-resistant cutting edge and the second wear-resistant cutting edge together form an approximate regular polygon, which is conducive to the centering of the material.

[0045] The first driving member 47 of the embodiment of the utility model includes a hydraulic cylinder.

[0046] The combination valve provided in the embodiment of the utility model drives the two valve flaps of the cylindrical valve flap assembly 20 to rotate through the valve flap driving assembly 40. The two valve flaps have the same rotation speed and opposite directions, so that the two valve flaps of the cylindrical valve flap assembly 20 can be opened and closed symmetrically in real time, ensuring that the discharge port is symmetrical relative to the center line of the blast furnace in real time, which is conducive to the centering of the material and alleviates the deviation of the material.

[0047] Compared with the prior art which uses a spherical valve flap assembly, the embodiment of the utility model uses a cylindrical valve flap assembly 20 to avoid material clamping during the operation of the equipment.

[0048] The first rotating shaft 41 and the first gear 43 in the embodiment of the utility model can be integrally formed by welding, forging, casting, etc. Similarly, the second rotating shaft 42 and the second gear 44 can also be integrally formed by welding, forging, casting, etc.

[0049] The material regulating valve provided in the embodiment of the utility model further includes a bearing assembly 49, and the bearing assembly 49 is sleeved on the outer wall surface of the first rotating shaft 41. Figure 5 As shown, it is used to support and define the first rotating shaft 41.

[0050] The combined valve provided in the embodiment of the utility model further comprises a first sealing component, and the outer wall surface of the first rotating shaft 41 and the outer wall surface of the second rotating shaft 42 are both provided with the first sealing component.

[0051] Specifically, the first sealing assembly includes a first sealing member 51 and a second sealing member 52. The first sealing member 51 is sleeved on one end of the first rotating shaft 41 close to the first crank 46. Figure 5 The first rotating shaft 41 is provided with a second sealing member 52 at one end close to the second rotating shaft 42, and the second rotating shaft 42 is provided with a second sealing member 52 at one end close to the first rotating shaft 41. Figure 6 As described above, the second sealing member 52 plays a role in preventing dust and achieving auxiliary sealing. Both the first sealing member 51 and the second sealing member 52 can be sealing rings.

[0052] The combined valve provided in the embodiment of the utility model further includes a valve plate 60, a valve seat 70 and a valve plate drive assembly 80. Figure 1 As shown, the valve plate 60 and the valve seat 70 are both arranged in the valve box body 10, and the valve plate driving assembly 80 is arranged on a side outside the valve box body 10. The valve plate driving assembly 80 is connected to the valve plate 60, and is used to drive the valve plate 60 to move toward or away from the valve seat 70, and is also used to drive the valve plate 60 to rotate so as to move away from the material outlet to avoid the impact and wear of the falling material on the valve plate 60.

[0053] The valve plate driving assembly 80 includes a second driving member 81, a connecting rod 82 and a swing arm 83. The second driving member 81 is connected to the swing arm 83 through the connecting rod 82. Figure 7 As shown, the swing arm 83 is connected to the valve plate 60, and the second driving member 81 drives the connecting rod 82 to drive the swing arm 83 and the valve plate 60 to move toward or away from the valve seat 70. The second driving member 81 in the embodiment of the utility model can be a hydraulic cylinder (pressing hydraulic cylinder), a motor, a hydraulic rod, a motor, etc.

[0054] The valve plate drive assembly 80 further includes a third drive member 84, a second crank 85 and a rotary arm 86. Figure 8As shown, the third driving member 84 is connected to the rotating arm 86 through the second crank 85, and the rotating arm 86 is connected to the swing arm 83. The third driving member 84 is used to drive the second crank 85 to drive the rotating arm 86 and the swing arm 83 to rotate, thereby driving the valve plate 60 to rotate, so that the valve plate 60 rotates to the side of the valve box 10, avoiding the falling material from impacting the valve plate 60, and reducing the wear of the valve plate 60. The third driving member 84 in the embodiment of the utility model can be a hydraulic cylinder (rotating hydraulic cylinder), a motor, a hydraulic rod, a motor, etc.

[0055] The combined valve provided in the embodiment of the utility model further includes a support seat 87, a support sleeve 88 and a slewing bearing 89. Fig. 9 As shown, the support seat 87 and the support sleeve 88 are both arranged on the outer wall surface of the swivel arm 86, wherein the support seat 87 provides the main support for the swivel arm 86, and the support sleeve 88 provides the auxiliary support for the swivel arm 86, thereby improving the reliability of the support. The swivel bearing 89 is arranged between the swivel arm 86 and the support seat 87, and the swivel bearing 89 provides the swivel arm 86 with axial support, radial support and tilting support.

[0056] The installation positioning and load support of the swivel arm 86 are provided by the swivel bearing 89. The valve plate drive assembly 80 has a small structure, which simplifies the installation and improves the load-bearing capacity.

[0057] The slewing bearing 89 in the embodiment of the utility model is preferably a three-row roller slewing bearing or a single-row cross roller slewing bearing.

[0058] The combined valve provided in the embodiment of the utility model further includes a second sealing component, which is arranged on the outer wall surface of the swivel arm 86 .

[0059] like Fig. 9 As shown, the second sealing assembly includes a third sealing member 91 and a fourth sealing member 92. The third sealing member 91 is disposed on the outer wall of the support sleeve 88 to achieve primary sealing. The fourth sealing member 92 is disposed between the slewing bearing 89 and the slewing arm 86 to provide dustproof and auxiliary sealing functions.

[0060] The embodiment of the utility model further provides a blast furnace ironmaking equipment, comprising the combination valve in any one of the above embodiments.

[0061] 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 combination valve, characterized in that: include: A valve box and a cylindrical valve flap assembly, wherein the cylindrical valve flap assembly is installed in the valve box; The cylindrical valve flap assembly includes a first valve flap and a second valve flap; A valve flap driving assembly, the valve flap driving assembly is arranged outside the valve housing body, and the valve flap driving assembly includes a first rotating shaft connected to the first valve flap, a second rotating shaft connected to the second valve flap, a first gear, a second gear, a third gear, a first crank and a first driving member; The first driving member is connected to the first rotating shaft through the first crank, the first gear sleeve is connected to the first rotating shaft, the second gear sleeve is connected to the second rotating shaft, the third gear is externally meshed with the first gear and the second gear respectively, and the first gear and the second gear have the same parameters.

2. The combination valve according to claim 1, characterized in that: It also includes a bearing group, which is sleeved on the outer wall surface of the first rotating shaft.

3. The combination valve according to claim 1, characterized in that: It also includes a first sealing component, and the outer wall surface of the first rotating shaft and the outer wall surface of the second rotating shaft are both provided with the first sealing component.

4. The combination valve according to any one of claims 1 to 3, characterized in that: It also includes a valve plate, a valve seat and a valve plate driving assembly, wherein the valve plate and the valve seat are both arranged inside the valve box body, and the valve plate driving assembly is arranged outside the valve box body. The valve plate driving assembly is connected to the valve plate and is used to drive the valve plate to move toward or away from the valve seat, and is also used to drive the valve plate to rotate so as to move away from the material outlet.

5. The combination valve according to claim 4, characterized in that: The valve plate drive assembly includes a second drive member, a connecting rod and a swing arm, the second drive member is connected to the swing arm through the connecting rod, the swing arm is connected to the valve plate, and the second drive member drives the connecting rod to drive the swing arm and the valve plate to move toward or away from the valve seat.

6. The combination valve according to claim 5, characterized in that: The valve plate drive assembly also includes a third drive member, a second crank and a rotating arm. The third drive member is connected to the rotating arm through the second crank, and the rotating arm is connected to the swing arm. The third drive member is used to drive the second crank to drive the rotating arm and the swing arm to rotate.

7. The combination valve according to claim 6, characterized in that: The valve plate drive assembly also includes a support seat, a support sleeve and a slewing bearing. The support seat and the support sleeve are both arranged on the outer wall surface of the slewing arm. The slewing bearing is arranged between the slewing arm and the support seat. The slewing bearing includes a three-row roller slewing bearing and a single-row cross roller slewing bearing.

8. The combination valve according to claim 6, characterized in that: It also includes a second sealing component, which is arranged on the outer wall surface of the rotating arm.

9. The combination valve according to claim 6, characterized in that: The first driving member, the second driving member and the third driving member are all hydraulic cylinders.

10. A blast furnace ironmaking equipment, characterized in that: It comprises a combination valve as claimed in any one of claims 1 to 9.

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