Gate valve of converter steelmaking charging system

Abstract

The utility model discloses a gate valve of a converter steelmaking charging system, which comprises a valve body with a material guide channel, a gate used for controlling the opening and closing of the material guide channel and a driving component, and openings on two opposite sides of the material guide channel are respectively provided with an upper flange used for connecting a weighing hopper and a lower flange used for connecting a material receiving piece. The upper opening, close to the weighing hopper, of the material guiding channel is in a big-end-up horn shape, the driving assembly comprises a lead screw nut pair and a rotary driver, and the rotary driver is connected with the inserting plate through the lead screw nut pair so as to drive the inserting plate to be switched between the position of closing and the position of opening the material guiding channel. And when the lead screw is driven to rotate, the position of the lead screw is always kept unchanged, and only the threaded sleeve drives the insertion plate to move, so that the total length of the whole set of device can be greatly reduced, the problem of large occupied space is avoided, and the space utilization rate of a converter steelmaking workshop is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to converter steelmaking equipment technical field, especially a plug valve of converter steelmaking feeding system. BACKGROUND

[0002] In the converter steelmaking process, it is necessary to quantitatively add slagging material to the converter or ladle through the flux feeding system and the ferroalloy feeding system, and in the feeding process, the slagging material passes through the weighing and discharging stages in turn, wherein the plug valve plays a key role.

[0003] In the weighing stage, the plug valve is closed, the slagging material falls into the weighing hopper from the stock bin through the vibrating feeder, and the slagging material is blocked by the closed plug valve and cannot be discharged, and the weighing sensor on the weighing hopper weighs the slagging material; after the weighing is completed, the discharging stage is entered, that is, the plug valve is opened, and the slagging material enters the converter or ladle through the discharging chute.

[0004] At present, the plug valve is commonly used as the utility model patent CN211420213U, and the opening and closing of the pneumatic plug valve is realized by means of the cylinder, but such pneumatic plug valves generally have the problem of occupying a large space, for example, when the plug stroke is 560mm, the total length of the complete pneumatic plug valve is 3815mm, and the maintenance platform below the pneumatic plug valve also needs to be made very large, so that not only the cost is high, but also a large space is occupied. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a plug valve of a converter steelmaking feeding system to solve the above problems, which can replace the existing pneumatic plug valve and avoid the problem of occupying a large space, and at the same time, the space utilization rate of the converter steelmaking workshop is improved.

[0006] To achieve the above purpose, the utility model provides the technical scheme as follows:

[0007] The utility model provides a plug valve of a converter steelmaking feeding system, which comprises a valve body with a material guiding channel, a plug plate for controlling the opening and closing of the material guiding channel, and a driving assembly for driving the plug plate to move; the opposite sides of the material guiding channel are respectively provided with an upper flange for connecting a weighing hopper and a lower flange for connecting a material receiving member; the upper opening of the material guiding channel close to the weighing hopper is in the shape of a horn with a large upper part and a small lower part; the driving assembly comprises a screw nut pair and a rotary driver, the rotary driver is connected to the plug plate through the screw nut pair to drive the plug plate to switch between the positions of closing and opening the material guiding channel.

[0008] Further, the valve body is provided with a plurality of guide members, the plug plate is limited by the guide members, so that the movement track of the plug plate is parallel to the extension direction of the screw rod of the screw nut pair.

[0009] Further, the guide is a guide wheel, which is respectively assembled to the inner wall of the valve body on the two sides of the screw nut pair, and the insertion plate slides against the wheel surface of the guide wheel.

[0010] Further, the screw nut pair comprises a screw rod and a screw sleeve, the screw sleeve is detachably assembled to the insertion plate, one end of the screw rod is screwed into the screw sleeve, and the other end of the screw rod is connected to the rotating shaft of the rotary driver through a shaft coupling.

[0011] Further, the rotary driver is a speed reducer.

[0012] Further, the circumferential wall of the material guiding channel is provided with an insertion plate opening on the side facing the rotary driver, the valve body has a mounting cavity adjacent to the material guiding channel, the insertion plate is movably inserted into the insertion plate opening, and the end of the screw rod of the screw nut pair, which is away from the insertion plate, is rotatably arranged in the wall of the mounting cavity and connected to the rotary driver.

[0013] Further, the wall of the mounting cavity is provided with a limit switch for triggering the rotary driver to be turned on or off, and the insertion plate is provided with a trigger piece matched with the limit switch.

[0014] Further, the trigger piece is a limit plunger, and the number of the limit plungers is two, which are respectively arranged at the bottom of the two ends of the insertion plate along the movement direction of the insertion plate to correspond to the positions of the insertion plate for closing and opening the material guiding channel.

[0015] The technical scheme has the following beneficial effects:

[0016] 1. The rotary driver such as a speed reducer is used to replace the cylinder in the prior art to change the driving mode from pneumatic to electric, and in the process of driving the screw rod of the screw nut pair to rotate by the rotary driver, the position of the screw rod of the screw nut pair remains unchanged, and the screw sleeve of the screw nut pair drives the displacement of the insertion plate to switch between the positions for closing and opening the material guiding channel, so that the total length of the whole device can be greatly reduced, for example, from 3815mm to 1735mm, which can save 2080mm of occupied space, avoid the problem of large occupied space, and improve the space utilization rate of the converter steelmaking workshop.

[0017] 2. The utility model can effectively reduce the size of the matching maintenance platform to save the use of materials, and can also arrange other equipment in the limited space to further improve the space utilization rate.

[0018] 3. The insertion plate valve of the utility model has simple structure, reasonable design, compact layout, high feasibility and strong practicality. Attached Figure Description

[0019] Figure 1 The figure shown is a cross-sectional view of the gate valve of the converter steelmaking charging system equipped with a weighing hopper and a support in the embodiment.

[0020] Figure 2 The diagram shown is a schematic of the gate valve of the converter steelmaking charging system when the material guide channel is open in the embodiment.

[0021] Figure 3 The diagram shown is a schematic of the gate valve of the converter steelmaking charging system when the material guide channel is closed in the embodiment. Detailed Implementation

[0022] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0024] Reference Figures 1 to 3 This embodiment provides a gate valve (hereinafter referred to as gate valve) for a converter steelmaking charging system, used for weighing and discharging slag-forming materials in conjunction with the converter steelmaking process.

[0025] like Figure 1 As shown, the slide gate valve of this embodiment includes a valve body 1 with a material guide channel 11, a slide gate 2 for controlling the opening and closing of the material guide channel 11, and a drive assembly 3 for driving the slide gate 2 to move. The upper and lower opposite sides of the material guide channel 11 are respectively provided with an upper flange 4 for connecting to the weighing hopper 7 and a lower flange 5 for connecting to the receiving component (such as the receiving hopper or the discharge chute) located below.

[0026] like Figure 2 and Figure 3 As shown, the drive assembly 3 includes a lead screw and nut pair and a rotary driver 33. The rotary driver 33 is connected to the insert plate 2 through the lead screw and nut pair to drive the insert plate 2 to switch between the closed and open positions of the guide channel 11.

[0027] In this embodiment, the circumferential wall of the material guide channel 11 is provided with a plate port 111 on the side facing the rotary driver 33, and the valve body 1 has an installation cavity 13 adjacent to the material guide channel 11. At this time, the material guide channel 11 can be connected to the installation cavity 13 through the plate port 111.

[0028] The plug plate 2 is movably inserted into the plug plate opening 111, and the valve body 1 is provided with a plurality of guide members 12, and the guide member 12 is a guide wheel, and the plurality of guide wheels are respectively assembled on the inner walls of the valve body 1 which are perpendicular to the screw nut pair, that is, the guide wheels are mounted on the inner walls of the material guiding channel 11 and the mounting cavity 13. Of course, in other embodiments, the guide member 12 can also adopt a chute structure or a sliding rail structure, and they form a sliding connection relationship with each other.

[0029] The plug plate 2 is slidably abutted against the wheel surface of the guide member 12 to form stable support for the plug plate 2, and the plug plate 2 is limited by the guide member 12 to ensure that the movement track of the plug plate 2 is parallel to the extension direction of the screw rod of the screw nut pair, and the extension direction of the screw rod is also the length direction of the plug valve in this embodiment.

[0030] Specifically, the screw nut pair includes a screw rod 31 and a screw sleeve 32, and the screw sleeve 32 is detachably assembled on the plug plate 2 through bolts, and when the screw sleeve 32 and the screw rod 31 are worn and cannot drive the plug plate 2, it can be quickly replaced.

[0031] One end of the screw rod 31 is screwed into the screw sleeve 32, the other end of the screw rod 31 is rotatably arranged in the wall of the mounting cavity 13, and is connected to the rotating shaft of the rotary driver 33 through the shaft coupling 6, and the rotary driver 33 is a speed reducer motor, so as to drive the screw rod 31 to rotate and provide driving force for the plug plate 2.

[0032] If the existing pneumatic plug valve is used in the charging system of the converter steelmaking, the cylinder shaft and the guide shaft will displace with the valve plate during the opening or closing process of the valve plate, resulting in a long displacement stroke of the valve plate of 560mm.

[0033] However, in the process of opening or closing the plug plate 2, only the plug plate displacement and the screw sleeve displacement occur, and the position of the screw rod remains unchanged in the front and rear movement directions of the plug plate 2, thereby greatly shortening the total length L of the whole device as shown in Figure 1 from 3815mm to 1735mm, thereby saving 2080mm of occupied space, and further reducing the maintenance platform and saving investment.

[0034] In summary, the rotary driver 33 such as a speed reducer motor is used in this embodiment to replace the cylinder of the existing technology, so that the driving mode is changed from pneumatic to electric, and during the process of driving the screw rod 31 of the screw nut pair to rotate, the position of the screw rod remains unchanged, and the screw sleeve 32 drives the plug plate 2 to displace correspondingly to switch between the positions of closing and opening the material guiding channel 11, therefore, the total length of the whole device can be greatly shortened, and the problem of large occupied space is avoided, and the space utilization rate of the converter steelmaking workshop is improved.

[0035] Furthermore, this embodiment can effectively reduce the size of the supporting maintenance platform to save materials, and can also arrange other equipment in a limited space to further improve space utilization.

[0036] In addition, the slide gate valve in this embodiment has a simple structure, reasonable design, compact layout, high feasibility and strong practicality.

[0037] Further preferred, such as Figure 1 As shown, the upper opening 112 of the material guide channel 11 near the weighing hopper 7 is shaped like a trumpet, wider at the top and narrower at the bottom, to facilitate material feeding.

[0038] In this specific embodiment, the valve body 1 is welded from channel steel and angle steel, the weighing hopper 7 is fixedly connected to the upper flange 4, the rotary actuator 33 is mounted on the bracket 8, and the bracket 8 is welded to the weighing hopper 7 to ensure stable support for the rotary actuator 33.

[0039] When the insert plate 2 needs to be opened or closed, the rotary driver 33 drives the lead screw 31 to rotate through the coupling 6. The lead screw 31 and the screw sleeve 32 are threaded together. Therefore, the rotation of the lead screw 31 will drive the screw sleeve 32 to screw in or out on the lead screw 31. The screw sleeve 32 drives the insert plate 2 to move, so as to insert or pull the insert plate 2 into or out of the guide channel 11. During the displacement process, the insert plate 2 is supported by the guide member 12, which also provides assistance for the displacement of the insert plate.

[0040] After weighing is completed, the baffle plate 2 is opened, and the slag material passes through the upper flange 4, the guide channel 11 of the valve body 1 and the lower flange 5, and then falls into the receiving hopper or the discharge chute, thus completing the discharge process.

[0041] Preferably, the two side walls of the mounting cavity 13 are equipped with limit switches for triggering the rotary drive 33 to open and close. The bottom of the insert plate 2, away from the upper opening 112, is provided with a trigger element that cooperates with the limit switches, and the specific trigger element is a limit striker. Of course, the inner wall of the insert plate opening 111 is provided with a clearance space to allow the limit striker to pass freely.

[0042] The limiting striker is provided in two parts, including a first limiting striker and a second limiting striker. The first limiting striker and the second limiting striker are respectively provided at the bottom of both ends of the insert plate 2 along its movement direction, so as to correspond to the positions of the insert plate 2 in closing and opening the guide channel 11, respectively. That is, the installation position of the first limiting striker corresponds to the closed position of the insert plate 2 closing the guide channel 11, and the installation position of the second limiting striker corresponds to the open position of the insert plate 2 opening the guide channel 11.

[0043] When the material guiding channel 11 is about to be opened, the plug-in plate 2 gradually leaves the material guiding channel 11, the plug-in plate 2 drives the second limiting impact ruler to touch the limiting switch, so that the rotary driver 33 is powered off, at this time the material guiding channel 11 is completely opened, and the plug-in plate 2 also stops moving.

[0044] When the material guiding channel 11 needs to be closed when the discharging is finished, the rotary driver 33 reverses and drives the screw rod 31 to rotate correspondingly, the screw sleeve 32 drives the plug-in plate 2 to move in the opposite direction, when the material guiding channel 11 is about to be closed, the plug-in plate 2 drives the first limiting impact ruler to touch the limiting switch, so that the rotary driver 33 is powered off, at this time the material guiding channel 11 is completely closed or opened, and the plug-in plate 2 also stops moving.

[0045] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all the changes are within the protection scope of the utility model.

Claims

1. A plug valve for a charging system of a converter steelmaking plant, characterized in that: It includes a valve body with a material guide channel, a baffle plate for controlling the opening and closing of the material guide channel, and a drive assembly for driving the baffle plate to move. The material guide channel has an upper flange for connecting to the weighing hopper and a lower flange for connecting to the receiving part on opposite sides of the opening; the upper opening of the material guide channel near the weighing hopper is flared, wider at the top and narrower at the bottom. The drive assembly includes a lead screw and nut pair and a rotary driver. The rotary driver is connected to the insert plate through the lead screw and nut pair to drive the insert plate to switch between the closed and open positions of the material guide channel.

2. The plug valve of a charging system of a converter steelmaking according to claim 1, characterized in that: The valve body is provided with multiple guide members, and the insert plate is restricted by the guide members so that the movement trajectory of the insert plate is parallel to the extension direction of the lead screw of the lead screw and nut pair.

3. The plug valve of a charging system of a converter steelmaking according to claim 2, characterized in that: The guide component is a guide wheel, which is respectively mounted on the inner walls of the valve body on both sides perpendicular to the lead screw and nut pair, and the insert plate slides against the wheel surface of the guide wheel.

4. The gate valve of the converter steelmaking charging system according to any one of claims 1-3, characterized in that: The lead screw and nut assembly includes a lead screw and a threaded sleeve; the threaded sleeve is detachably mounted on the insert plate; one end of the lead screw is screwed into the threaded sleeve, and the other end is connected to the rotating shaft of the rotary drive via a coupling.

5. The slide gate valve of the converter steelmaking charging system according to claim 4, characterized in that: The rotary drive is a geared motor.

6. The gate valve of the converter steelmaking charging system according to any one of claims 1-3, characterized in that: The circumferential wall of the material guide channel has an insertion port on the side facing the rotary driver. The valve body has an installation cavity adjacent to the material guide channel. The insertion plate is movably inserted into the insertion port. The end of the lead screw of the lead screw nut pair away from the insertion plate is rotatably inserted through the wall of the installation cavity and connected to the rotary driver.

7. The slide gate valve of the converter steelmaking charging system according to claim 6, characterized in that: The wall of the mounting cavity is equipped with a limit switch for triggering the rotary driver to open and close, and the insert plate is provided with a trigger element that cooperates with the limit switch.

8. The slide gate valve of the converter steelmaking charging system according to claim 7, characterized in that: The trigger is a limiting striker, and two limiting strikers are provided. The two limiting strikers are respectively located at the bottom of both ends of the insert plate along its movement direction, so as to correspond to the positions of the insert plate when closing and opening the material guide channel.

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