Marble valve for spray gun of side-blown converter

Abstract

The utility model discloses a marble valve for a spray gun of a side-blown converter, which is characterized in that two sides of a steel ball rolling channel in a marble valve body are respectively provided with a triangular rib, the two ribs can overhead a steel ball, and the steel ball rolls upwards along a track formed by the ribs when the steel ball is inserted into the spray gun, so that the rolling resistance is reduced; and the phenomenon of difficult gun insertion caused by the fact that the steel balls fall into nests formed by the gun insertion channels is avoided. The gland for pressing the valve seat in the marble valve adopts flange connection, so that the groove for fixing the spray gun can be always positioned up and down, the position of an air inlet pipe on the spray gun is always upward after the spray gun is inserted, the pipeline connection is convenient, and the site is relatively tidy.

Description

Technical Field

[0001] The utility model belongs to a valve structure, in particular to a bullet valve used for a side-blowing furnace spray gun. Background Art

[0002] The ball valve is a common auxiliary device for side-blown furnace spray guns. It is typically installed on the copper water jacket tuyeres of side-blown furnaces. The spray gun is inserted into the ball valve and extended into the molten pool inside the copper water jacket. During operation, natural gas is introduced into the tail pipe of the spray gun, and air into the upper inclined pipe. The natural gas and air mix inside the spray gun and then release the molten pool. During maintenance, the spray gun needs to be removed. To prevent molten metal from flowing back, air is introduced into the upper inclined pipe of the ball valve. After the spray gun is removed, the steel ball inside the ball valve falls due to its own weight, blocking the gun insertion port at the rear of the valve body. Existing ball valves have the following two problems: First, the diameter of the channel through which the steel ball moves diagonally up and down is larger than the diameter of the steel ball, causing the steel ball to roll on the lower surface of the inclined channel. The presence of the horizontal gun insertion hole in the valve body creates a concave recess at the bottom of the steel ball's inclined rolling channel. When the spray gun is inserted, the steel ball falls into this recess as the gun tip pushes the steel ball upward, making insertion difficult. Second, the tail gland of the ball valve is connected to the valve body by a threaded connection. After assembly, the spray gun positioning groove on the gland cannot be fixed at the same point. After the spray gun is inserted into the ball valve, the inclined tube on the upper part of the spray gun cannot be guaranteed to be in an upward position. This makes connecting the pipes inconvenient and the pipelines are also messy. Utility Model Content

[0003] The utility model provides a ball valve for a side-blowing furnace spray gun, aiming to solve the problems of difficulty in inserting the gun and uncertainty in the position of the inclined pipe of the gun.

[0004] To this end, the present invention adopts the following technical solutions:

[0005] A bullet valve for a side-blown furnace spray gun comprises a three-way bullet valve body, the valve body comprising a horizontal spray gun insertion channel and an inclined bullet valve air inlet channel, the bullet valve air inlet channel being connected to the middle position of the spray gun insertion channel, an inclined steel ball rolling channel being provided in the valve body at one end near the spray gun insertion port, a steel ball being placed in the steel ball rolling channel; at least two protruding guide ribs are provided on the inner wall of the steel ball rolling channel along the rolling direction of the steel ball, the guide ribs lifting the steel ball so that the bottom of the steel ball is out of contact with the steel ball rolling channel, the steel ball straddling the guide ribs and rolling up and down along the guide ribs.

[0006] Furthermore, the guide ribs include two, and the two guide ribs are symmetrically arranged on the left and right sides of the inner wall of the steel ball rolling channel.

[0007] Furthermore, the cross section of the guide rib is triangular, semicircular, elliptical or other shapes that can support the steel ball.

[0008] Furthermore, the spray gun is inserted into the channel inlet with a flange connected to a pressure cover, and the top and bottom of the rear end of the pressure cover are provided with grooves, and the grooves are used to fix the spray gun.

[0009] The beneficial effects of the utility model are as follows: the steel ball rolls on the two guide ribs with little resistance, and the spray gun can be easily inserted, preventing the steel ball from falling into the concave socket and causing difficulty in inserting the gun; since the pressure cover is fixed with bolts, the grooves for fixing the spray gun can be ensured to be in upper and lower positions, so that after the spray gun is inserted into the ball valve, the air inlet pipe on the spray gun is always located at the upper part, which makes it convenient to connect the pipeline and the site is relatively tidy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of an existing ball valve;

[0011] Figure 2 This is a schematic diagram of the state when the spray gun is inserted into the existing ball valve;

[0012] Figure 3 This is a schematic diagram of the spray gun after it is installed in place;

[0013] Figure 4 This is a schematic diagram of the structure of the marble valve of the present utility model;

[0014] Figure 5 This is a schematic diagram of the state of the spray gun of the utility model after being installed in place;

[0015] In the figure: 1-valve body, 2-spray gun insertion channel, 3-steel ball, 4-valve seat, 5-gland, 6-groove, 7-locating pin, 8-steel ball rolling channel, 9-ball valve air inlet channel, 10-brick layer, 11-copper water jacket, 12-small water jacket for air outlet, 13-spray gun, 14-spray gun handle, 15-spray gun air inlet, 16-spray gun natural gas inlet;

[0016] 19-bolt, 21-guide rib, 22-flange. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] like Figure 1 As shown in the figure, it is a schematic diagram of an existing ball valve. The steel ball rolling channel 8 in the figure is an inclined channel. The bottom surface of the steel ball 3 contacts the bottom surface of the steel ball rolling channel 8, and the steel ball 3 rolls along the steel ball rolling channel 8. A concave recess is formed at the bottom of the steel ball rolling channel 8. When the gun is inserted, the gun head pushes the steel ball 3 upward and the steel ball 3 falls into the recess, making it difficult to insert the gun. Figure 2 As shown, at this time, the steel ball 3 is in the concave socket formed by the spray gun insertion channel 2 on the lower surface of the steel ball rolling channel 8. The steel ball 3 is low against the spray gun head end, making it difficult to insert the spray gun. Figure 3 This is the state after the spray gun is installed in place. At this time, the steel ball 3 is pushed into the top of the spray gun, and the spray gun handle is stuck in the groove 6 on the ball valve cover 5.

[0019] like Figure 3 and 4 The figure shows a ball valve for a side-blown furnace spray gun according to the present invention, comprising a valve body 1, a valve seat 4, a gland 5, and a steel ball 2. The valve body 1 is a three-way pipe structure with a connecting flange on the left side and a ball valve air inlet passage 9 on the upper side. Inside, there is a spray gun insertion passage 2 and a steel ball rolling passage 8. A triangular-section guide rib 21 is located on each side of the steel ball rolling passage 8. The guide rib 21 lifts the steel ball 3, disengaging the bottom of the steel ball 3 from contact with the steel ball rolling passage 8. The steel ball 3 straddles the guide rib 21 and rolls up and down along the guide rib 21. The valve body 1 is mounted with a valve seat 4. The gland 5 is bolted to the valve body 1 via a flange, pressing the valve seat 4 tightly. Two grooves 6 for fixing the spray gun are provided on the upper and lower sides of the right side of the gland 5.

[0020] The cross-sectional shape of the guide rib 21 on the valve body 1 can be a triangle, a semicircle, an ellipse or the like; the groove on the gland 5 is always in the upper and lower positions after assembly.

[0021] The application of the marble valve of this utility model on the side-blowing furnace is as follows:

[0022] A small tuyere water jacket 12 is mounted on the copper water jacket 11 of the side-blown furnace. The marble valve of the present invention is bolted to this small tuyere water jacket 12. Under its own weight, the steel ball 3 rests at the bottom of the ball rolling channel 8, blocking the valve seat 4. When a spray gun 13 is inserted into the marble valve, the gun head pushes the steel ball 3 upward. Because the steel ball 3 is suspended on two guide ribs 21, rolling resistance is minimal, allowing the spray gun 13 to be easily inserted into the marble valve. Once in place, rotate the gun 13 to the right at a certain angle, and the gun handle 14 engages with the groove 6 on the marble valve gland 20, securing the gun. Because the groove 6 is always positioned vertically, the air inlet pipes 15 on all spray guns are guaranteed to face upward, facilitating connection.

Claims

1. A bullet valve for a side-blown furnace spray gun, comprising a three-way bullet valve body (1), the valve body (1) comprising a horizontal spray gun insertion channel (2) and an inclined bullet valve air inlet channel (9), the bullet valve air inlet channel (9) being connected to the middle position of the spray gun insertion channel (2), an inclined steel ball rolling channel (8) being further provided in the valve body (1) near one end of the spray gun insertion port, the steel ball (3) being placed in the steel ball rolling channel (8); characterized in that, At least two protruding guide ribs (21) are provided on the inner wall of the steel ball rolling channel (8) along the rolling direction of the steel ball (3). The guide ribs (21) lift the steel ball (3) so that the bottom of the steel ball (3) is out of contact with the steel ball rolling channel (8). The steel ball (3) rides on the guide ribs (21) and rolls up and down along the guide ribs (21).

2. The ball valve for the side-blown furnace lance according to claim 1, characterized in that: The guide ribs (21) include two guide ribs (21), which are symmetrically arranged on the left and right sides of the inner wall of the steel ball rolling channel (8).

3. The ball valve for the side-blown furnace lance according to claim 1, characterized in that: The cross section of the guide rib (21) is triangular, semicircular or elliptical.

4. The ball valve for the side-blown furnace lance according to claim 1, characterized in that: The spray gun insertion channel (2) has an upper flange connected to a pressure cover (5) at its inlet. The top and bottom of the rear end of the pressure cover (5) are provided with grooves (6), and the grooves (6) are used to fix the spray gun.

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