CN111779911B

CN111779911B - High-temperature liquid metal automatic control reversing valve

Info

Publication number: CN111779911B
Application number: CN202010441318.9A
Authority: CN
Inventors: 王红彬; 谢云华; 陈云; 马士淋; 苏杭; 李周华; 李志禄; 刘庆东; 周先辉
Original assignee: Smelting Branch Yunnan Tin Co ltd
Current assignee: Smelting Branch Yunnan Tin Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-11-09
Anticipated expiration: 2040-05-22
Also published as: CN111779911A

Abstract

The invention discloses an automatic control reversing valve for high-temperature liquid metal, which belongs to the technical field of metallurgical machinery and comprises a main flow pipe, wherein an inlet pipe and an outlet pipe are respectively arranged at the front end and the rear end of the main flow pipe, the inlet pipe and the outlet pipe are respectively communicated with the outlet end of an upstream chute and the inlet end of a downstream chute in a butt joint mode, the main flow pipe is arranged in a downward inclined mode and can rotate around the axis of the main flow pipe, a branch flow pipe is arranged in the middle of the main flow pipe, and the branch flow pipe is in a trapezoid shape with a large upper end and a small lower end. The reversing valve can meet reversing and intercepting requirements, meanwhile, the technical effects that the reversing valve is not easy to block and block, residual solid metal in the reversing valve is convenient to clean and the like can be achieved, and the problem that the high-temperature liquid metal cannot be sealed in the using process of the traditional reversing valve and the liquid metal leaks is solved. Moreover, the automatic reversing design is adopted, manual operation reversing is not needed, and the purposes of reducing the labor intensity of workers, reducing the occupational hazard risk and reducing the production operation cost are achieved.

Description

High-temperature liquid metal automatic control reversing valve

Technical Field

The invention relates to the technical field of metallurgical machinery, in particular to an automatic control reversing valve for high-temperature liquid metal.

Background

The solid crude metal forms high-temperature liquid metal after passing through a high-temperature smelting furnace, so that impurity removal and deep processing of subsequent processes are facilitated. However, in the process of conveying high-temperature liquid metal, due to the influence of factors such as high temperature, impurities and temperature difference, the problems that the conveying device is deformed, the reversing cut-off device is difficult to seal, the safety risk in the conveying process is high, and conveying pipelines are disordered are easily caused. Taking liquid tin transportation in the tin smelting process As an example, liquid crude tin after the smelting furnace firstly passes through a front bed to be cooled and remove As and Fe, and then passes through an oxidation pot and a impurity removal pot to remove As, Sb, Cu and the like; removing Pb and Bi again through a crystallizer and removing As and Sb through a vacuum furnace; finally, the tin ingot is sent to a casting system to be cast into a tin ingot. Each impurity removing link in the refining process needs to convey and transport liquid tin, and the liquid tin is conveyed by equipment such as a traditional tin bag and a tin transferring pipe, so that the production efficiency is low, the labor intensity of operators is high, great occupational health hazard risks and potential safety hazard risks exist, and meanwhile, the problems of more crossed operation, messy operation site, extremely poor impression and the like caused by temporary tin transferring pipe laying are solved in the operation site. According to statistics, the tin ladle and the tin sliding pipe are required to be used for conveying about 6000 times every year, the pipeline is cleaned and replaced about 4000 times every month, and operating personnel operate in a high-temperature environment for a long time, so that the labor intensity is high, meanwhile, scalding accidents of personnel and equipment are easily caused in the operating process, the smoothness of normal operation of a production process system of the company is severely limited, and the safe operation risk is increased. In order to improve the production economic benefit, improve the operating environment, reduce the labor intensity of staff and safe operation risk, the chute made of novel materials is adopted to convey high-temperature liquid metal tin so as to meet the production requirement of the subsequent procedures. A novel high-temperature liquid metal automatic control reversing valve is installed and designed on a chute, traditional tin packages, tin rotating pipes and other equipment are replaced, and automatic and efficient transfer of liquid metal is achieved.

In the production process, the conveyed high-temperature liquid metal is conveyed according to different treatment process requirements, and in the intermediate process, the high-temperature liquid metal can be conveyed to a plurality of storage pots or a chute to convey metals with different components. Therefore, according to the quality requirements of each process, reversing cut-off devices are required to be installed between chutes and before storage pots so as to avoid personal and equipment injuries caused by pollution or leakage of intermediate products treated in different processes. However, the temperature of the high-temperature liquid metal is relatively high, so that the conventional reversing cut-off device is difficult to meet the process sealing requirement. The main problems are as follows: firstly, high-temperature liquid metal is easy to cause thermal deformation of reversing shutoff devices such as ball valves, butterfly valves, gate valves and the like in a high-temperature state, and a gap between a valve body and a valve core is large and difficult to seal. Secondly, impurities such as oxidation slag, granular sediment, hard heads and the like are often accompanied in the high-temperature liquid metal, so that reversing shutoff devices such as ball valves, butterfly valves, gate valves and the like are easy to block and jam, the starting of the gate valves is influenced, and even the high-temperature liquid metal is leaked. And thirdly, after the liquid metal of various gate valves stops being transported, the residual high-temperature liquid metal is easily adhered to and blocked by the valve body and the valve core after being cooled in the gate valve. The reversing shutoff device is difficult to seal in a high-temperature state, the valve body and the valve core are easily bonded, jammed and blocked after being cooled, and the reversing shutoff device cannot stably run in an electric automatic control mode and is easy to cause equipment accidents.

Disclosure of Invention

Aiming at the problems in the background art, the invention provides the high-temperature liquid metal automatic control reversing valve which can meet the reversing interception, simultaneously realize the technical effects that the reversing valve is not easy to block and block, residual solid metal in the reversing valve is convenient to clean and the like, and avoid the problem that the high-temperature liquid metal cannot be sealed in the using process of the traditional reversing valve, so that the liquid metal is leaked. Moreover, the automatic reversing design is adopted, manual operation reversing is not needed, and the purposes of reducing the labor intensity of workers, reducing the occupational hazard risk and reducing the production operation cost are achieved.

In order to achieve the purpose, the invention adopts the following technical scheme: the high-temperature liquid metal automatic control reversing valve comprises a main flow pipe, wherein an inlet pipe and an outlet pipe are arranged at the front end and the rear end of the main flow pipe respectively, the inlet pipe and the outlet pipe are in butt joint communication with an upstream chute outlet end and a downstream chute inlet end respectively, the main flow pipe is downwards inclined and can rotate around the axis of the main flow pipe, a branch flow pipe is arranged in the middle of the main flow pipe, and the branch flow pipe is in a trapezoid shape with a large upper end and a small lower end.

Preferably, the front end and the rear end of the main flow pipe are respectively provided with a rolling ring I and a rolling ring II, the lower sides of the rolling ring I and the rolling ring II are respectively and correspondingly provided with a riding wheel assembly, the riding wheel assembly comprises two symmetrically arranged riding wheels, and the rolling ring I and the rolling ring II are respectively lapped on the two riding wheels.

Preferably, the riding wheel assembly further comprises a U-shaped base and a limiting blocking wheel, the riding wheel is movably mounted on the U-shaped base, the limiting blocking wheel is mounted on the downstream side of the U-shaped base, the axis of the limiting blocking wheel is orthogonal to the axis of the main flow pipe, and the downstream sides of the rolling ring I and the rolling ring II respectively abut against the outer peripheral surface of the limiting blocking wheel.

Preferably, the device also comprises an end cover, wherein the end cover is arranged on the end surface of the outlet of the upstream chute, a hole is formed in the end cover, the inlet end of the inlet pipe is inserted in the hole of the end cover, and sealing materials are adopted between the end cover and the upstream chute and between the end cover and the inlet pipe for sealing.

Preferably, the lower end of the outlet pipe extends into the downstream chute and is in lap joint with the downstream chute, and the lap joint length is 200 mm-400 mm.

Preferably, the device further comprises a driving assembly, wherein the outer peripheral surface of the main flow pipe is connected with the driving assembly, and the driving assembly drives the main flow pipe to rotate on the outer peripheral surface.

As preferablely, drive assembly includes driven sprocket I, driven sprocket II, the chain, the transmission shaft, drive sprocket I, drive sprocket II and motor, driven sprocket I and driven sprocket II set up respectively on the outer peripheral face of sprue upper end and lower extreme, the transmission shaft is installed to sprue one side, be provided with drive sprocket I and drive sprocket II on the transmission shaft, driven sprocket I and drive sprocket I, be connected through chain drive respectively between driven sprocket II and the drive sprocket II, motor drive is adopted to transmission shaft one end.

Preferably, the storage pot is provided with an upper flow pipe, the upper flow pipe is arranged on the upper side of an inlet of the storage pot through a fixing ring, a limiting piece is arranged on the rear side of the inlet at the top end of the upper flow pipe of the storage pot, a flow guide pipe is arranged on an outlet of the branch flow pipe, and the diameter of the flow guide pipe is smaller than that of the upper flow pipe of the storage pot.

Preferably, the PCL controller is further included, a limit travel switch is arranged on the inner side wall of the limit sheet and connected with the input end of the PCL controller, and the output end of the PCL controller is connected with the motor.

Preferably, an electromagnetic chuck is arranged on the rear side of the main flow pipe and connected to a signal output end of the PCL controller, and the electromagnetic chuck is adsorbed on the side wall of the branch flow pipe when the branch flow pipe rotates to the highest point.

The invention has the beneficial effects that:

the reversing valve can meet reversing and intercepting requirements, meanwhile, the technical effects that the reversing valve is not easy to block and block, residual solid metal in the reversing valve is convenient to clean and the like can be achieved, and the problem that the high-temperature liquid metal cannot be sealed in the using process of the traditional reversing valve and the liquid metal leaks is solved. Moreover, the automatic reversing design is adopted, manual operation reversing is not needed, and the purposes of reducing the labor intensity of workers, reducing the occupational hazard risk and reducing the production operation cost are achieved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic illustration of the engagement of the idler assembly and drive assembly of the present invention;

FIG. 4 is a schematic view of the main flow tube and branch flow tubes of the present invention;

FIG. 5 is a mating view of the idler assembly of the present invention;

FIG. 6 is a schematic view of the flow tube structure of the storage pot of the present invention;

FIG. 7 is a schematic diagram of the PLC electrical automatic control of the present invention;

in the figure: the device comprises an upstream chute 1, a downstream chute 2, a storage pot 3, a main flow pipe 4, a branch flow pipe 5, a flow guide pipe 6, an end cover 7, an electromagnetic chuck 8, a storage pot up flow pipe 9, a fixing ring 10, an inlet pipe 11, an outlet pipe 12, a rolling ring I13, a rolling ring II 14, a driven sprocket I15, a driven sprocket II 16, a chain 17, a transmission shaft 18, a driving sprocket I19, a driving sprocket II 20, a motor 21, a U-shaped base 22, a riding wheel 23, a limiting stop wheel 24, a limiting piece 25 and a limiting travel switch 26.

Detailed Description

In order to make the technical solution and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings for the convenience of the skilled person.

As shown in fig. 1 to 7, the automatic control reversing valve for high-temperature liquid metal comprises a main flow pipe 4, wherein an inlet pipe 11 and an outlet pipe 12 are respectively arranged at the front end and the rear end of the main flow pipe 4, the inlet pipe 11 and the outlet pipe 12 are respectively communicated with the outlet end of an upstream chute 1 and the inlet end of a downstream chute 2 in a butt joint mode, the main flow pipe 4 is arranged in a downward inclined mode and can rotate around the axis of the main flow pipe 4, and a branch flow pipe 5 is arranged in the middle of the main flow pipe 4. When the main flow pipe 4 rotates to the position where the branch flow pipes 5 vertically face upwards, the main flow pipe 4 is communicated with the upstream chute 1 and the downstream chute 2 to carry out feeding work, and when the main flow pipe 4 rotates to the position where the branch flow pipes 5 vertically face downwards, the outlets of the branch flow pipes 5 are aligned with the inlets of the lower storage pots 3. The branch flow pipe 5 is in a trapezoid shape with a large upper end and a small lower end, so that the materials can conveniently fall in a parabola shape in the branch flow pipe 5 after entering, and the switching of the material conveying direction is realized. In addition, in the embodiment, the main flow pipe 4 is arranged at an angle of 4 degrees in a downward inclination mode, the material flow velocity is 0.6m/s, and the distance between two ends of a parabola formed by materials in the branch flow pipe 5 is 140 mm-260 mm, so that the length dimension of the inlet of the branch flow pipe 5 is 400 mm-500 mm, the width dimension is 146mm of the pipe diameter, the possibility of contact between the parabola and the pipe wall of the branch flow pipe 5 is reduced, the problems of splashing and abrasion caused by collision of high-temperature liquid metal flowing down on the pipe wall are avoided, and meanwhile the problems of thermal expansion at high temperature and material backflow caused by gas emission due to the fact that the pipe diameter of the original branch flow pipe is too small can be avoided.

Further, both ends are provided with rolling circle I13 and rolling circle II 14 respectively around on the mainstream pipe 4, and rolling circle I13 and rolling circle II 14 downside correspond respectively and are provided with the riding wheel subassembly, and the riding wheel subassembly includes two symmetrical arrangement's riding wheel 23, and rolling circle I13 and rolling circle II 14 overlap joint respectively on two riding wheels. The rolling ring I13, the rolling ring II 14 and the riding wheel assembly can support the main flow pipe 4, and stable operation of the main flow pipe 4 during rotation is guaranteed. The riding wheel assembly further comprises a U-shaped base 22 and a limiting blocking wheel 24, the riding wheel 23 is movably mounted on the U-shaped base 22, the limiting blocking wheel 24 is mounted on the downstream side of the U-shaped base 22, the axis of the limiting blocking wheel 24 is orthogonal to the axis of the main flow pipe 4, and the downstream sides of the rolling ring I13 and the rolling ring II 14 respectively abut against the outer peripheral surface of the limiting blocking wheel 24. The limiting blocking wheel 24 can limit the main flow pipe 4 and prevent the main flow pipe 4 from sliding downwards due to dead weight. The invention also comprises an end cover 7, wherein the end cover 7 is arranged on the end surface of the outlet of the upstream chute 1, a hole is formed in the end cover 7, the inlet end of the inlet pipe 11 is inserted in the hole of the end cover 7, sealing materials are respectively adopted between the end cover 7 and the upstream chute 1 and between the end cover 7 and the inlet pipe 11, and the sealing materials adopted in the embodiment are asbestos pads. The end cover 7 can ensure that the materials in the upstream chute 1 can be fully and intensively fed into the inlet pipe 11, and the leakage of the materials is reduced. Meanwhile, the lower end of the outlet pipe 12 extends into the downstream chute 2 and is in lap joint with the downstream chute 2, the lap joint length is 200 mm-400 mm, the outlet pipe 12 can stably rotate in the downstream chute 2, and meanwhile the problem of dripping and leaking caused by backflow of high-temperature liquid metal can be effectively avoided.

Furthermore, the present invention further comprises a driving assembly, wherein the outer circumferential surface of the main flow pipe 4 is connected with the driving assembly, and the driving assembly drives the main flow pipe to rotate on the outer circumferential surface. The driving assembly is not contacted with high-temperature materials, so that the problems that the traditional reversing valve component is deformed and damaged by heat, and particularly, the transmission lubricating grease is easy to volatilize to cause the blockage of the reversing device are solved. Meanwhile, the driving assembly in the embodiment comprises a driven sprocket I15, a driven sprocket II 16, a chain 17, a transmission shaft 18, a driving sprocket I19, a driving sprocket II 20 and a motor 21, wherein the driven sprocket I15 and the driven sprocket II 16 are respectively arranged on the outer peripheral surfaces of the upper end and the lower end of the main flow pipe 4, the transmission shaft 18 is installed on one side of the main flow pipe 4, the driving sprocket I19 and the driving sprocket II 20 are arranged on the transmission shaft 18, the driven sprocket I15 and the driving sprocket I19 are respectively in transmission connection with the driven sprocket II 16 and the driving sprocket II 20 through the chain 17, one end of the transmission shaft 18 is driven by the motor 21, and the motor 21 is a servo motor. Through I19 of driving sprocket and II 20 drive I15 of driven sprocket and II 16 rotations of driven sprocket, drive main flow tube 4 and carry out axial rotary motion for the material switching-over process is steady high-efficient. Furthermore, the storage pot upper flow pipe 9 is arranged on the upper side of the storage pot inlet through a fixing ring 10, a limiting piece 25 is arranged on the rear side of the inlet at the top end of the storage pot upper flow pipe 9, a flow guide pipe 6 is arranged on the outlet of the branch flow pipe 5, the flow guide pipe 6 and the branch flow pipe 5 pass through the storage pot upper flow pipe, welding is carried out in a full welding mode, a gap cannot be reserved, and the pipe diameter of the flow guide pipe 6 is smaller than that of the storage pot upper flow pipe 9. When the mainstream pipe 4 rotates downwards for switching, the outlet flow guide pipe 6 of the tributary pipe 5 contacts with the limiting piece 25 on the flow guide pipe 9 of the storage pot, and the limiting piece 25 plays a supporting and limiting role for the tributary pipe 5 and the flow guide pipe 6, so that stable material conveying is ensured.

Particularly, the PCL controller is further provided, a limit travel switch 26 is arranged on the inner side wall of the limit sheet 25, the limit travel switch 26 is connected with the input end of the PCL controller, and the output end of the PCL controller is connected with the motor 21. The limiting piece 25 is an arc piece matched with the pipe diameter of the upper flow pipe 9 of the storage pot, and the supporting and limiting effect on the flow guide pipe 6 is improved. The rear side of the main flow pipe 4 is provided with an electromagnetic chuck 8, the electromagnetic chuck 8 is connected to a signal output end of the PCL controller, and the electromagnetic chuck 8 is adsorbed on the side wall of the branch flow pipe 5 when the branch flow pipe 5 rotates to the highest point. In the downward movement process of the main flow pipe 4 rotating branch flow pipe 5, when the branch flow pipe 5 contacts the limit travel switch 26 on the limit sheet 25, the branch flow pipe 5 is indicated to move in place, at the moment, the limit travel switch 26 feeds back a signal to the PCL controller, and the PCL controller acts to control the disconnection of the power supply of the motor 21, so that the motor 21 is prevented from colliding with the storage pot upper flow pipe 9 and being damaged even if the motor 21 is not stopped. When the main flow pipe 4 and the branch flow pipe rotate upwards to the highest point, the PCL controls the power supply of the motor 21 to be disconnected, and meanwhile, the power supply of the electromagnetic chuck 8 is turned on, so that the electromagnetic chuck 8 sucks the side wall of the branch flow pipe 5, the main flow pipe 4 is prevented from rotating downwards during conveying, and the product quality and safety accidents are avoided.

In conclusion, the reversing valve can meet reversing and intercepting requirements, meanwhile, the technical effects that the reversing valve is not easy to block and block, residual solid metal in the reversing valve is convenient to clean and the like can be achieved, and the problem that the liquid metal is leaked due to the fact that the high-temperature liquid metal cannot be sealed in the using process of the traditional reversing valve is solved. Moreover, the automatic reversing design is adopted, manual operation reversing is not needed, and the purposes of reducing the labor intensity of workers, reducing the occupational hazard risk and reducing the production operation cost are achieved.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a high temperature liquid metal automatic control switching-over valve which characterized in that: the device comprises a main flow pipe (4), wherein an inlet pipe (11) and an outlet pipe (12) are respectively arranged at the front end and the rear end of the main flow pipe (4), the inlet pipe (11) and the outlet pipe (12) are respectively communicated with the outlet end of an upstream chute (1) and the inlet end of a downstream chute (2), the main flow pipe (4) is arranged in a downward inclined manner and can rotate around the axis of the main flow pipe, a branch flow pipe (5) is arranged in the middle of the main flow pipe (4), the branch flow pipe (5) is in a ladder shape with a large upper end and a small lower end, rolling rings I (13) and II (14) are respectively arranged at the front end and the rear end of the main flow pipe (4), carrier roller assemblies are respectively and correspondingly arranged at the lower sides of the rolling rings I (13) and II (14), the carrier roller assemblies comprise two carrier rollers (23) which are symmetrically arranged, the rolling rings I (13) and II (14) are respectively lapped on the two carrier rollers, the driving assembly is further comprising a driving assembly, the peripheral surface of the main flow pipe (4) is connected with the driving assembly, the driving component is used for driving the outer circumferential surface to rotate.

2. The high temperature liquid metal automatic control reversing valve of claim 1, characterized in that: the riding wheel assembly further comprises a U-shaped base (22) and a limiting blocking wheel (24), the riding wheel (23) is movably mounted on the U-shaped base (22), the limiting blocking wheel (24) is mounted on the downstream side of the U-shaped base (22), the axis of the limiting blocking wheel (24) is orthogonal to the axis of the main flow pipe (4), and the downstream sides of the rolling ring I (13) and the rolling ring II (14) respectively abut against the outer peripheral surface of the limiting blocking wheel (24).

3. A high temperature liquid metal automatic control diverter valve as defined in claim 1 or 2, wherein: the device is characterized by further comprising an end cover (7), wherein the end cover (7) is installed on the outlet end face of the upstream chute (1), the end cover (7) is provided with a hole, the inlet end of the inlet pipe (11) is inserted into the hole of the end cover (7), and sealing materials are adopted between the end cover (7) and the upstream chute (1) and between the end cover (7) and the inlet pipe (11).

4. A high temperature liquid metal automatic control diverter valve as defined in claim 3 wherein: the lower end of the outlet pipe (12) extends into the downstream chute (2) and is in lap joint with the downstream chute (2), and the lap joint length is 200 mm-400 mm.

5. The high temperature liquid metal automatic control reversing valve of claim 1, characterized in that: the driving mechanism comprises a driven sprocket I (15), a driven sprocket II (16), a chain (17), a transmission shaft (18), a driving sprocket I (19), a driving sprocket II (20) and a motor (21), the driven sprocket I (15) and the driven sprocket II (16) are respectively arranged on the outer peripheral surfaces of the upper end and the lower end of a main pipe (4), the transmission shaft (18) is installed on one side of the main pipe (4), the driving sprocket I (19) and the driving sprocket II (20) are arranged on the transmission shaft (18), the driven sprocket I (15) and the driving sprocket I (19), the driven sprocket II (16) and the driving sprocket II (20) are respectively in transmission connection through the chain (17), and the motor (21) is adopted for driving one end of the transmission shaft (18).

6. The automatic control reversing valve for high-temperature liquid metal as claimed in claim 1 or 5, wherein: still including storage pot upper flow tube (9), storage pot upper flow tube (9) are installed at storage pot entry upside through solid fixed ring (10), and the rear side on storage pot upper flow tube (9) top entry sets up spacing piece (25), is provided with honeycomb duct (6) on tributary pipe (5) export, and honeycomb duct (6) pipe diameter is less than storage pot upper flow tube (9) pipe diameter.

7. The high temperature liquid metal automatic control reversing valve of claim 6, characterized in that: still include the PCL controller, be provided with spacing travel switch (26) on spacing piece (25) inside wall, spacing travel switch (26) are connected with PCL controller input, and motor (21) are connected to the PCL controller output.

8. The high temperature liquid metal automatic control reversing valve of claim 7, characterized in that: the rear side of the main flow pipe (4) is provided with an electromagnetic chuck (8), the electromagnetic chuck (8) is connected to a signal output end of the PCL controller, and the electromagnetic chuck (8) is adsorbed on the side wall of the branch flow pipe (5) when the branch flow pipe (5) rotates to the highest point.