Iron-making blast furnace regulating valve

Abstract

The utility model discloses an iron-making blast furnace regulating valve which comprises a regulating valve body, a regulating valve body crank, a connecting rod, an actuator connecting support, an actuator, a cotter pin, a gasket and a fastener. The ironmaking blast furnace regulating valve adopts an offset structure and the connecting rod with the welding fixed connecting pin shafts at the two ends, so that the phenomenon that the lower edge of the straight connecting rod interferes with the upper edge of an actuator connecting bracket beam in the later assembling link in the manufacturing process of the existing ironmaking blast furnace regulating valve is overcome, and the activity at the hinged parts of the two ends of the connecting rod and the crank is reduced; therefore, the technical problems that grinding of the actuator support beam is labor-consuming and time-consuming, attractiveness is affected, and valve adjusting action is lagged compared with actuator action in use are solved, manufacturing cost is saved by 5%, and adjusting precision of the valve is improved.

Description

Technical Field

[0001] The utility model relates to a regulating valve for an iron-making blast furnace, in particular to a regulating valve for air and gas pipelines of a hot blast furnace system of an iron-making blast furnace. Background Art

[0002] In the hot blast furnace system of the iron-making blast furnace, various pipelines are densely distributed, including cold air pipelines, combustion air pipelines and gas pipelines. According to the smelting requirements, the flow of pipeline media needs to be adjusted. Therefore, it is necessary to install and use a regulating valve. At present, there are two types of electric actuator structures for regulating valves. One is the direct connection type, that is, the valve shaft of the regulating valve extends into the output hole of the actuator for connection. The other is the connecting rod type, that is, the two ends of the connecting rod are respectively connected to the actuator crank and the valve shaft crank. Since the above-mentioned iron-making pipeline media are all above normal temperature, the heat of the direct connection pipeline medium will be transferred to the actuator through the valve shaft, affecting the actuator adjustment accuracy. Therefore, the connecting rod type connection regulating valve is generally used in the hot blast furnace system of the iron-making blast furnace. However, the connecting rod type connection regulating valve has disadvantages in manufacturing and use. Due to system errors in manufacturing, the lower edge of the direct connecting rod is easy to interfere with the upper edge of the actuator support beam during later assembly. At this time, a groove needs to be ground on the upper edge of the support beam, which is not only labor-intensive but also affects the appearance. Another drawback is that the two ends of the connecting rod are connected to the actuator crank and the valve shaft crank through a pin shaft, one pin is connected to two holes, and the clearance fit causes the joint to be subject to mutual shear force during operation, resulting in a large amount of movement at the hinge, which causes the valve adjustment action to lag behind the actuator action, affecting the adjustment accuracy. Therefore, it is very urgent and necessary to develop a blast furnace regulating valve that can overcome the above drawbacks. Summary of the invention

[0003] In order to overcome the technical difficulties in the manufacturing process of existing iron-making blast furnace regulating valves, that is, grinding the actuator support beam in the later assembly link is labor-intensive and affects the appearance, and that the valve regulating action lags behind the actuator action during use, the utility model provides a new iron-making blast furnace regulating valve.

[0004] The technical solution adopted by the utility model is:

[0005] The ironmaking blast furnace regulating valve comprises a regulating valve body, a valve crank, a connecting rod, a connecting bracket, an actuator, a cotter pin and a washer, and a fastener. The connecting rod comprises a connecting rod body and a pin shaft, the connecting rod adopts an offset structure, and the two ends of the connecting rod are welded and fixedly connected with the pin shaft.

[0006] The connecting rod adopts an offset structure, and the offset is 30mm-50mm, that is, the distance between the supporting axis of the upper and lower edges of the connecting rod and the connecting line of the pin shaft holes at both ends of the connecting rod is 30mm-50mm.

[0007] The connecting rod body is made of structural steel, preferably Q235B or Q345B.

[0008] The pin is made of medium carbon steel or medium carbon alloy steel, preferably 45 steel or 40Cr steel.

[0009] The iron-making blast furnace regulating valve adopts an offset structure and a connecting rod with welded fixed connecting pins at both ends. It overcomes the interference between the lower edge of the straight connecting rod and the upper edge of the actuator support beam in the later assembly link in the manufacturing process of the existing iron-making blast furnace regulating valve, and reduces the activity of the connecting rod at the hinge between the two ends of the connecting rod and the crank, thereby solving the technical problems of labor-intensive and time-consuming grinding of the actuator support beam that affects the appearance and the valve adjustment action lagging behind the actuator action during use, saving 5% of the manufacturing cost and improving the valve adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is the front view of the utility model.

[0011] Attached Figure 2 It is the AA sectional view of the main view of the utility model.

[0012] Attached Figure 3 It is the front view of the connecting rod of the utility model.

[0013] Attached Figure 4 It is a top view of the connecting rod of the utility model. DETAILED DESCRIPTION

[0014] Embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0015] like Figure 1 to Figure 4 As shown, the utility model of the ironmaking blast furnace regulating valve comprises a regulating valve body (1), a regulating valve body crank (11), a connecting rod (10), an actuator connecting bracket (3), an actuator (5), a cotter pin (7) and a gasket (8), and a fastener. One end of the actuator connecting bracket (3) is connected to the flange (2) on the regulating valve body (1) through a fastener, and the other end is connected to the actuator connecting base (6) through a fastener. The actuator (5) drives the regulating valve body (1) through the connecting rod (10), and the pins (10-1) at both ends of the connecting rod (10) are respectively connected to the actuator crank (4) and the regulating valve body crank (11), and there are cotter pins (7) and gaskets (8) to prevent retreat.

[0016] The connecting rod (10) comprises a connecting rod body (10-2) and a pin shaft (10-1). The connecting rod (10) adopts an offset structure. The supporting axes of the upper and lower edges of the connecting rod are 30 mm to 50 mm away from the connecting line of the pin shaft holes at both ends of the connecting rod. The existence of this offset distance enables the lower edge (13) of the connecting rod (10) and the upper edge (12) of the actuator connecting bracket beam (9) to maintain a safe distance. The connecting rod body (10-2) and the pin shaft (10-1) are fixedly connected by welding.

[0017] The connecting rod body (10-2) is made of structural steel, preferably Q235B or Q345B.

[0018] The pin shaft (10-1) is made of medium carbon steel or medium carbon alloy steel, preferably 45 steel or 40Cr steel.

[0019] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A regulating valve for an ironmaking blast furnace, comprising a regulating valve body, a regulating valve body crank, a connecting rod, an actuator connecting bracket, an actuator, a cotter pin and a washer, and a fastener, characterized in that The connecting rod adopts an offset structure, and the connecting rod comprises a connecting rod body and a pin shaft, and both ends of the connecting rod body are fixedly connected with the pin shaft by welding.

2. The ironmaking blast furnace regulating valve according to claim 1 is characterized in that: The connecting rod adopts an offset structure, and the offset amount is 30mm to 50mm.

3. The ironmaking blast furnace regulating valve according to claim 1 is characterized in that: The connecting rod body of the connecting rod is made of structural steel.

4. The ironmaking blast furnace regulating valve according to claim 3 is characterized in that: The connecting rod body of the connecting rod is made of Q235B.

5. The regulating valve for an ironmaking blast furnace according to claim 3 is characterized in that: The connecting rod body of the connecting rod is made of Q345B.

6. The regulating valve for an ironmaking blast furnace according to claim 1, characterized in that: The pin shaft is made of medium carbon steel or medium carbon alloy steel.

7. The regulating valve for an ironmaking blast furnace according to claim 6, characterized in that: The pin shaft is made of 45 steel.

8. The regulating valve for an ironmaking blast furnace according to claim 6, characterized in that: The pin shaft is made of 40Cr steel.

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