A special flow valve for hot blast stove mixing

Abstract

The application relates to the technical field of flow valves, and provides a special flow valve for a hot blast furnace air mixing device, which comprises a valve body, a piston slidably connected to the valve body, and a driving assembly for controlling the piston to reciprocatingly slide along the axial direction of the valve body, an end face of the piston arranged to face the wind is provided with a flow cavity for air inflow, a plurality of flow holes are provided in the outer peripheral wall of the piston and are communicated with the flow cavity and the inner cavity of the valve body, and the inner peripheral wall of the valve body is provided with a second abutting portion for abutting against the outer peripheral wall of the piston. The application has the beneficial effects that the flow range of the obtained flow is increased, and the flow of the air can be more accurately controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot blast stove mixed air flow control, and particularly relates to a special flow valve for hot blast stove mixed air. BACKGROUND

[0002] For traditional ironmaking processes mainly using raw materials such as iron ore and coal, the smaller the wind temperature fluctuation during ironmaking, the better the furnace condition, and the more conducive to production. Therefore, the high hot blast delivered by the hot blast stove needs to be temperature-regulated, that is, a certain proportion of cold blast is delivered to the high hot blast pipeline, and the hot blast temperature flowing into the blast furnace is controlled, which is usually referred to as mixed air temperature regulation.

[0003] At present, the mixed air of traditional ironmaking processes at home and abroad is regulated by butterfly valves. Such valves generally realize flow regulation by rotating a circular disc to partially block the cross-sectional area of the pipeline. However, under the special working conditions of hot blast stoves, there are obvious deficiencies. In particular, during fine adjustment at a small angle, a series of problems such as serious cavitation damage to the service life of hardware facilities may be caused. At the same time, due to the limitations of structural design, the overall adjustable range is narrow (typically only about 20° to 70°), and the effective regulation efficiency is almost lost beyond this range. In addition, under certain working conditions, severe vibration may also occur, which greatly restricts the ability of the existing technology to meet more complex needs. Therefore, it is urgent to develop a new type of mixed air special flow valve to overcome the current limitations. CONTENT OF THE INVENTION

[0004] In order to solve the above problems, the present application provides a special flow valve for hot blast stove mixed air.

[0005] The special flow valve for hot blast stove mixed air provided by the present application adopts the following technical scheme:

[0006] A special flow valve for hot blast stove mixed air, comprising a valve body, a piston slidingly connected to the valve body, and a drive assembly for controlling the piston to reciprocally slide along the axial direction of the valve body, wherein the end face of the piston facing the wind is provided with a flow-through cavity for air inflow, the outer peripheral wall of the piston is provided with a plurality of flow-through holes communicating with the flow-through cavity and the inner cavity of the valve body, and the inner peripheral wall of the valve body is provided with a second abutting portion for abutting against the outer peripheral wall of the piston.

[0007] By adopting the technical scheme, the relative position between the piston and the second abutting portion is adjusted by the driving assembly, so that the plurality of flow-through holes on the outer peripheral wall of the piston can be gradually opened or closed along with the sliding of the piston in the valve body, thereby realizing gradual regulation of the air volume flowing through the valve. This design enables the valve to accurately control the flow within a large range, avoiding the problem of limited regulation range of the traditional butterfly valve. At the same time, compared with the cavitation, erosion and vibration problems that may occur when the butterfly valve is adjusted at a small angle, the structure utilizes the cooperation of the piston and the second abutting portion to ensure the stability and reliability of the adjustment process, improve the accuracy and stability of the mixed air temperature regulation, and thus optimize the working efficiency and service life of the hot blast furnace.

[0008] Preferably, the flow-through hole is a circular hole.

[0009] By adopting the technical scheme, the flow-through hole is set as a circular hole, which can ensure that the fluid flows more smoothly when passing through the flow-through hole, reduce the occurrence of turbulence, and thus improve the accuracy of flow control. Specifically, this design helps to reduce the noise and vibration generated when the fluid passes through, while avoiding the problem of local stress concentration that may be caused by irregularly shaped holes, thereby prolonging the service life of the valve.

[0010] Preferably, the second abutting portion includes a mounting ring fixedly connected to the inner peripheral wall of the valve body and a second abutting ring arranged on the mounting ring away from the inner peripheral wall of the valve body, the thickness of the second abutting ring is greater than the thickness of the mounting ring, and the end faces of the second abutting ring and the mounting ring away from the cavity opening of the flow-through cavity are flushly arranged.

[0011] By adopting the technical scheme, when the second abutting portion abuts on the middle part of the piston, the flow-through holes located on both sides of the second abutting portion may have wind flowing into the flow-through cavity from the flow-through holes on the windward side, which may collide with the wind flowing from the flow-through cavity, thereby affecting the flow rate and flow direction of the wind. To this end, by specifically arranging the second abutting portion as the mounting ring and the second abutting ring, since the thickness of the second abutting ring is greater than the thickness of the mounting ring, and the end faces of the second abutting ring and the mounting ring away from the cavity opening of the flow-through cavity are flushly arranged, the cross section of the second abutting ring and the mounting ring along the axial direction of the valve body is arranged in an L shape, and the end face close to the wind inlet of the second abutting portion can form a certain space, thereby reducing the possibility of relatively more wind flowing into the flow-through cavity from the flow-through holes, reducing the occurrence of collision phenomenon, and further reducing the influence on the flow rate of the wind.

[0012] Preferably, one end of the piston close to the cavity opening of the flow-through cavity is provided with a first abutting portion for abutting with the second abutting portion.

[0013] By adopting the technical scheme, the first abutting part is arranged around one end of the piston close to the cavity opening of the flow-through cavity, which can cooperate with the second abutting part to accurately limit the position of the piston, thereby effectively controlling the sliding range of the piston. This structure ensures that the opening or closing of the flow-through hole is more accurate, thereby realizing fine regulation and control of the flow rate of the mixed air flow. At the same time, this position limiting manner improves the stability and reliability of the valve operation, avoiding the problem of flow rate out of control caused by excessive movement of the piston.

[0014] Preferably, one end of the piston away from the first abutting part is arranged with a first limiting part, and the first limiting part is used for abutting against the end face of the second abutting part.

[0015] By adopting the technical scheme, the first limiting part is arranged, and the first limiting part abuts against the end face of the second abutting part, so that when the first limiting part abuts against the second abutting part, the flow valve is in a fully closed state, thereby improving the sealing effect between the valve body and the piston, reducing the possibility of leakage of the input air. In addition, the path of the piston driven by the driving assembly can be limited, thereby reducing the possibility of sliding and separating between the piston and the second abutting part, and the possibility of air leakage.

[0016] Preferably, the first limiting part is arranged with a sealing ring close to the end face of the second abutting part.

[0017] By adopting the technical scheme, the sealing ring is arranged to further improve the sealing effect between the second abutting part and the piston in the fully closed state.

[0018] Preferably, one end of the piston close to the first abutting part is arranged with a second limiting part, and the second limiting part is used for abutting against the end face of the second abutting part away from the first limiting part.

[0019] By adopting the technical scheme, the second limiting part is arranged, and it is used for abutting against the second abutting part in cooperation with the first limiting part, thereby limiting the movement range of the piston, thereby reducing the possibility of sliding and separating of the piston from the valve body.

[0020] Preferably, the piston sequentially includes a mounting area and a flow-through area along the axial direction, the driving assembly is mounted on the mounting area, the flow-through hole is arranged in the flow-through area, and the thickness of the second abutting part is greater than the width of the flow-through area.

[0021] By adopting the technical scheme, the second abutting portion is arranged, and a space is left between the piston and the inner wall of the valve body, if the width of the second abutting portion is smaller than the width of the flow-through area, wind can flow into the flow-through cavity from the flow-through hole on the windward side, and the possibility of the wind colliding with the wind flowing from the flow-through cavity is caused, so as to affect the flow rate and the flow direction of the wind.

[0022] Preferably, the driving assembly comprises a hinged rod hinged to the piston, a crank hinged to the hinged rod, a rotating shaft penetrating through the crank, and a driving member driving the rotating shaft to rotate, and the rotating shaft is rotationally connected to the valve body.

[0023] By adopting the technical scheme, the driving member is started, and the rotating shaft, the crank and the hinged rod are sequentially driven to move, the rotating movement of the rotating shaft drives the piston to move linearly, specifically, the rotating shaft is driven to rotate by the driving member, the crank is driven to rotate, and the hinged rod drives or pulls the piston to move along the axial direction of the valve body. This structure can accurately adjust the position of the piston, so as to change the opening number of the flow-through hole and realize fine control of the flow rate. Compared with the traditional butterfly valve adjustment mode, this design avoids the problems of cavitation, erosion and vibration that may occur during small-angle adjustment, expands the adjustment range, and improves the stability and accuracy of the mixed air temperature adjustment.

[0024] Preferably, the driving assembly comprises an electric push rod arranged in the valve body, and an output shaft of the electric push rod is fixedly connected with the piston.

[0025] By adopting the technical scheme, the electric push rod is used to directly drive the piston to move linearly. Compared with the traditional crank transmission structure, this design simplifies the transmission mechanism, reduces the matching error between parts, and improves the accuracy and stability of the movement. At the same time, the electric push rod is arranged in the valve body, which effectively saves the external space and improves the compactness of the whole device. In addition, the fixed connection between the electric push rod and the piston ensures the efficiency and reliability in the force transmission process, further enhances the accuracy of the flow-through hole opening control, and better meets the demand of mixed air temperature adjustment.

[0026] In summary, the utility model has the following beneficial effects:

[0027] 1、According to the driving assembly to adjust the relative position between the piston and the second abutting part, so that the plurality of flow-through holes on the outer peripheral wall of the piston can be gradually opened or closed with the sliding of the piston in the valve body, thereby realizing the gradual regulation of the air flow through the valve. This design enables the valve to accurately control the flow within a wide range, avoiding the problem of limited adjustment range of traditional butterfly valves. At the same time, compared with the cavitation, erosion and vibration problems that may occur when the butterfly valve is adjusted at a small angle, the structure utilizes the cooperation of the piston and the second abutting part to ensure the stability and reliability of the adjustment process, improve the accuracy and stability of the mixed air temperature regulation, and thus optimize the working efficiency and service life of the hot blast furnace.

[0028] 2、The flow-through hole is set as a circular hole, which can ensure that the fluid flows more smoothly when passing through the flow-through hole, reduce the occurrence of turbulence, and thus improve the accuracy of flow control. Specifically, this design helps to reduce noise and vibration generated when the fluid passes through, while avoiding the problem of local stress concentration that may be caused by irregularly shaped holes, prolonging the service life of the valve.

[0029] 3、Start the driving member, sequentially drive the rotating shaft, the crank and the hinged rod to move, and the rotating motion of the rotating shaft drives the piston to move linearly. This motion is relatively efficient. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a cross-sectional structure schematic diagram of embodiment 1 of the present application;

[0031] Figure 2 is a structure schematic diagram of the piston in embodiment 1 of the present application;

[0032] Figure 3 is a structure schematic diagram of the electric push rod in embodiment 1 of the present application;

[0033] Figure 4 is a structure schematic diagram of embodiment 2 of the present application;

[0034] Figure 5 is a structure schematic diagram of embodiment 3 of the present application.

[0035] BRIEF DESCRIPTION OF DRAWINGS: 1, valve body; 11, inflow end; 12, outflow end; 13, second abutting part; 131, mounting ring; 132, second abutting ring; 14, mounting plate; 2, piston; 21, abutting area; 22, flow-through area; 23, mounting area; 24, flow-through cavity; 25, first abutting part; 26, flow-through hole; 27, first limiting part; 28, sealing ring; 29, second limiting part; 3, driving assembly; 31, hinged rod; 32, crank; 33, rotating shaft; 34, electric push rod. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying Figures 1-5Further details of the application are described below.

[0037] The application discloses a special flow valve for air mixing of a hot blast stove.

[0038] Embodiment 1

[0039] A special flow valve for air mixing of a hot blast stove, referring to Figure 1 、 Figure 2 , comprising a valve body 1, a piston 2 slidably connected to the valve body 1, and a driving assembly 3 for controlling the piston 2 to reciprocally slide along the axial direction of the valve body 1, wherein the two ends of the valve body 1 are respectively an inflow end 11 and an outflow end 12, and the piston 2 can be arranged at the inflow end 11 or the middle part of the valve body 1, which is specifically arranged according to the required thickness of the valve body 1 and the environment, and in this embodiment, the piston 2 arranged at the inflow end 11 is shown.

[0040] Wherein the piston 2 comprises, along its axial direction, in sequence, an abutting area 21, a flow-through area 22 and a mounting area 23, wherein the end face of the piston 2 located in the abutting area 21 and arranged to face the wind is provided with a flow-through cavity 24 for air inflow, and one end of the piston 2 close to the cavity opening of the flow-through cavity 24 is provided with a first abutting part 25, and the first abutting part 25 is a first abutting ring, and the inner peripheral wall of the valve body 1 is provided with a second abutting part 13 for abutting the outer peripheral wall of the piston 2, and the first abutting part 25 is used for abutting the second abutting part 13. Wherein the second abutting part 13 specifically comprises a mounting ring 131 fixedly connected with the inner peripheral wall of the valve body 1 and a second abutting ring 132 arranged away from the inner peripheral wall of the valve body 1 of the mounting ring 131, and the thickness of the second abutting ring 132 is greater than that of the mounting ring 131, and the end faces of the second abutting ring 132 and the mounting ring 131 away from the cavity opening of the flow-through cavity 24 are flushly arranged, so that the cross section of the second abutting ring 132 along the axial direction is L-shaped.

[0041] The outer peripheral wall of the piston 2 located in the flow-through area 22 is provided with a plurality of flow-through holes 26 communicated with the flow-through cavity 24 and the inner cavity of the valve body 1, and in this embodiment, the flow-through holes 26 are circular holes, which are convenient for manufacturing and processing and also conducive to uniform distribution of air flow pressure. It should be noted that the flow-through holes 26 can also be selected as elliptical or other regular shapes as a form of multiple holes, but it should be noted that the selection of different shapes may affect the characteristics of the air flow, which needs to be considered comprehensively according to the requirements of the use environment.

[0042] Wherein the piston 2 is located in the mounting area 23 to be mounted with the driving assembly 3, and one end of the piston 2 away from the first abutting part 25 is provided with a first limiting part 27, and the first limiting part 27 is arranged in the mounting area 23, and the first limiting part 27 is used for abutting the end face of the second abutting part 13, and further, in order to reduce the possibility of air leakage when the first limiting part 27 abuts against the second abutting part 13, in this embodiment, the end face of the first limiting part 27 close to the second abutting part 13 can be provided with a sealing ring 28.

[0043] Wherein, for the linear motion of the piston 2, in this embodiment, the driving assembly 3 can include a hinged rod 31 hinged to the piston 2, a crank 32 hinged to the hinged rod 31, a rotating shaft 33 fixedly penetrating the crank 32, and a driving member (not shown in the figure) driving the rotating shaft 33 to rotate, wherein the rotating shaft 33 is rotationally connected to the valve body 1. The driving assembly 3 is a traditional crank 32-linkage mechanism to drive the piston 2 to move forward, wherein the driving member can be a driving motor fixedly connected to the rotating shaft 33. It should be noted that the driving assembly 3 can also be an electric push rod 34 built into the valve body 1, as shown in the figure, the inner wall of the valve body 1 protrudes an installation plate 14 for fixedly connecting the electric push rod 34, the output shaft of the electric push rod 34 rotationally penetrates the installation plate 14, and the output shaft of the electric push rod 34 is fixedly connected to the piston 2, which is relatively simple compared with the crank 32-linkage mechanism. Figure 2

[0044] The implementation principle of the hot blast stove air mixing dedicated flow valve in this embodiment is as follows: according to the driving assembly 3, the relative position between the piston 2 and the second abutting portion 13 is adjusted, so that the plurality of flow-through holes 26 on the outer peripheral wall of the piston 2 can be gradually opened or closed along with the sliding of the piston 2 in the valve body 1, thereby realizing gradual adjustment of the air flow passing through the valve. This design enables the valve to accurately control the flow within a large range, avoiding the problem of limited adjustment range of traditional butterfly valves. At the same time, compared with the cavitation, erosion and vibration problems that may occur when the butterfly valve is adjusted at a small angle, the structure utilizes the cooperation of the piston 2 and the second abutting portion 13 to ensure the stability and reliability of the adjustment process, improves the accuracy and stability of the air mixing temperature adjustment, and further optimizes the working efficiency and service life of the hot blast stove.

[0045] Embodiment 2:

[0046] Referring to Figure 4 The difference between the embodiment 1 and the embodiment 2 is that the second limiting portion 29 is arranged around the end of the piston 2 close to the first abutting portion 25, and the second limiting portion 29 is used to abut against the end face of the second abutting portion 13 away from the first limiting portion 27.

[0047] Embodiment 3:

[0048] Referring to Figure 5 The difference between the embodiment 1 and the embodiment 3 is that the thickness of the second abutting portion 13 is greater than the width of the flow-through area 22. The design that the thickness of the second abutting portion 13 is greater than the width of the flow-through area 22 enhances the stability of the piston 2 during movement, effectively prevents the leakage problem caused by the position deviation of the piston 2, and thus improves the working reliability of the entire flow valve.

[0049] ​The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A hot blast stove air mixing dedicated flow valve, characterized by: The valve body (1), the piston (2) connected to the valve body (1) and the driving assembly (3) for controlling the piston (2) to reciprocate along the valve body (1), the end face of the piston (2) is provided with a flow cavity (24) for the wind flow, the outer wall of the piston (2) is provided with a plurality of flow holes (26) communicated with the flow cavity (24) and the inner cavity of the valve body (1), and the inner wall of the valve body (1) is provided with a second abutting portion (13) for abutting the outer wall of the piston (2).

2. The hot blast stove air mixing dedicated flow valve according to claim 1, characterized in that: The flow hole (26) is a circular hole.

3. The hot blast stove air mixing dedicated flow valve according to claim 1, characterized in that: The second abutting portion (13) comprises a mounting ring (131) fixedly connected with the inner wall of the valve body (1) and a second abutting ring (132) provided on the mounting ring (131) away from the inner wall of the valve body (1), the thickness of the second abutting ring (132) is greater than that of the mounting ring (131), and the end faces of the second abutting ring (132) and the mounting ring (131) away from the cavity opening of the flow cavity (24) are flushly arranged.

4. The hot blast stove air mixing dedicated flow valve according to claim 1, characterized in that: The piston (2) is provided with a first abutting portion (25) at one end close to the cavity opening of the flow cavity (24) for abutting the second abutting portion (13).

5. The hot blast stove air mixing dedicated flow valve according to claim 4, characterized in that: The piston (2) is provided with a first limiting portion (27) at one end away from the first abutting portion (25) for abutting the end face of the second abutting portion (13).

6. The hot blast stove air mixing dedicated flow valve according to claim 5, characterized in that: The first limiting portion (27) is provided with a sealing ring (28) close to the end face of the second abutting portion (13).

7. The hot blast stove air mixing dedicated flow valve according to claim 5, characterized in that: The piston (2) is provided with a second limiting portion (29) at one end close to the first abutting portion (25) for abutting the end face of the second abutting portion (13) away from the first limiting portion (27).

8. The hot blast stove air mixing dedicated flow valve according to claim 1, characterized in that: The piston (2) comprises a mounting area (23) mounted with the driving assembly (3) and a flow area (22) along the axial direction of the piston (2), the flow hole (26) is arranged in the flow area (22), and the thickness of the second abutting portion (13) is greater than the width of the flow area (22).

9. The hot blast stove air mixing dedicated flow valve according to claim 1, characterized in that: The driving assembly (3) comprises a hinged rod (31) hinged to the piston (2), a crank (32) hinged to the hinged rod (31), a rotating shaft (33) fixedly penetrating the crank (32) and a driving member for driving the rotating shaft (33) to rotate, and the rotating shaft (33) is rotationally connected to the valve body (1).

10. The hot blast stove air mixing dedicated flow valve according to claim 1, characterized in that: The driving assembly (3) comprises an electric push rod (34) arranged in the valve body (1), and an output shaft of the electric push rod (34) is fixedly connected with the piston (2).

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