Method for installing and adjusting tank cover of pickling line

Abstract

The invention relates to the field of equipment for cleaning or pickling metal materials, in particular to a pickling line tank cover mounting and adjusting method. A pickling section and a rinsing section are oppositely arranged in parallel, at least five grooves (1) are sequentially formed in the pickling section to serve as pickling grooves, at least five grooves (1) are sequentially formed in the rinsing section to serve as rinsing grooves, and the pickling unit groove cover mounting and adjusting method is characterized by comprising the following steps that S1, a safety pin is not connected; s2, performing hydraulic valve poking for the first time; and S3, second-time hydraulic valve poking is carried out. The device is convenient to install and good in leakproofness.

Description

Technical Field

[0001] The invention relates to the field of equipment for cleaning or pickling metal materials, in particular to a method for installing and adjusting a tank cover of a pickling machine unit. Background Art

[0002] The cold rolling processing line includes pickling units and pickling rolling units, both of which need to be set up with pickling sections and rinsing sections. At present, shallow tank turbulent pickling technology is mostly used. With the gradual maturity of pickling technology and construction technology, the tank body has gradually improved from the previous steel lining plastic + brickwork to PPH material. Regardless of the material of the tank body, the tank cover is generally made of PPH material. The tank cover of the pickling section is divided into inner and outer covers, and the tank cover of the rinsing section is not divided into inner and outer covers. The working principle of the tank cover is: the hydraulic cylinder drives the opening and closing frame, and the opening and closing frame is connected to the tank cover lifting lug, so that the tank cover can be opened and closed in manual / automatic mode.

[0003] The current slot cover opening and closing method has the following disadvantages: 1. The installation and adjustment time is long. Generally, there are 16 sets of slot cover opening and closing devices in the pickling section + rinsing section of the conventional pickling mill. The installation and adjustment time is 15 to 30 days or even longer, and it may not achieve the desired effect. 2. The slot cover cannot effectively seal the hydrochloric acid mist, and the strong corrosiveness of the acid mist will damage the pneumatic and hydraulic valve platforms, pipelines and other carbon steel valves, squeeze roller brackets and other equipment in the pickling section. Summary of the invention

[0004] In order to overcome the defects of the prior art and provide a sealing device which is easy to install and has good airtightness, the present invention discloses a method for installing and adjusting a tank cover of a pickling unit.

[0005] The present invention achieves the purpose of the invention through the following technical solutions: A method for installing and adjusting a tank cover of a pickling machine unit, wherein a pickling section and a rinsing section are arranged opposite to and parallel to each other, at least five tanks are sequentially arranged on the pickling section as pickling tanks, and at least five tanks are sequentially arranged on the rinsing section as rinsing tanks, a rotating shaft is horizontally arranged at the edge of the tank opening, the tank cover covers the tank opening, at least two cover lifting ears are arranged on the top of the tank cover, and cover lifting ear holes are arranged on the cover lifting ears, the bottom of the tank cover opening and closing frame is rotatably sleeved on the rotating shaft, the top of the tank cover opening and closing frame is provided with frame lifting ears equal in number to the cover lifting ears, and the position of each frame lifting ear corresponds to the position of a cover lifting ear, the cylinder body of the driving oil cylinder is fixed on the ground on one side of the tank provided with the rotating shaft, and the movable end of the driving oil cylinder piston rod is rotatably connected to the middle part of the tank cover opening and closing frame, Its characteristics are: it is implemented in sequence according to the following steps: S1: Do not connect the upper lugs of the slot cover lifting and closing frame and the safety pins of the slot cover, and adjust the slot cover to a symmetrical position in a natural state; S2: The first hydraulic valve is poke, and the slot cover opening and closing frame is moved independently. The slot cover opening and closing frame is adjusted by adjusting the gasket at the bottom of the driving cylinder to ensure the opening position of the slot cover opening and closing frame, so that the safety pin is naturally pinned into the pin hole on the column of the slot cover opening and closing frame; S3: The second hydraulic valve is poke, and the tank cover opening and closing frame is independently actuated. The tank cover opening and closing frame is adjusted by adjusting the cover lifting ear and the gasket to ensure the closed position of the tank cover opening and closing frame, so that the lifting ear pin connecting the cover lifting ear and the frame lifting ear is naturally pinned into the cover lifting ear and the frame lifting ear; S4: When hydraulically activating the valve twice, the process is slow first and then fast, so as to avoid interference and collision between the tank cover and the tank during the opening and closing process of the tank cover; S5: The installation position of the cover lifting lug, the transmission side is a horizontal long hole, and the operation side is a vertical long hole; S6: Each tank cover is provided with four cover lifting ears, which are installed according to the specific positioning of the tank cover and the tank cover opening and closing frame to prevent the tank cover from moving left and right when opening and closing; S7: The gaskets of the cover ears are removed and collected in one place, so that they can be added or removed as needed when adjusting the slot cover in the future; S8: When the tank cover is closed, the driving cylinder reduces the pressure to 70 bar through the pressure reducing valve, and when the tank cover is opened, the system pressure is 140 bar; S9: Before the first poke of the valve, poke the valve to fill the rodless chamber with hydraulic oil, and then poke the valve in the opposite direction to open the slot cover opening and closing frame; S10: If the cover opening and closing frame vibrates during the last stroke when the cover is closed, the reason is that the back pressure of the rod cavity is low, then the speed should be appropriately reduced; S11: The debugging sequence is: open the safety pin → open and close the slot cover of the low-pressure valve → adjust the speed and pressure of the high-pressure valve → accurately position the slot cover → operate the slot cover on the panel and adjust the speed through hydraulic coordination → adjust the limit switch → interlock input; S12: After everything is completed, weld the stopper at the corresponding position of the support of the cover lifting ear and the bearing seat of the slot cover opening and closing frame. Pay attention to the protection of the PPH slot body and slot cover during welding hot work.

[0006] The method for installing and adjusting the tank cover of the pickling unit is characterized by further comprising the following steps: S13: The tank cover includes an outer cover and an inner cover. The center of the outer cover coincides with the center of the tank. If there is interference with the inner side of the tank during the opening and closing process, the inner cover moves in opposite directions in a natural state when the outer cover is not connected to the cover lifting lug. The difference in the distance between the two sides (WS and DS) and the water seal tank is not less than 10 mm (too small will cause interference with the tank body when opening and closing the tank cover); S14: After the slot cover is closed, when installing the cover lifting lug, if the thickness difference between the gasket groups on the same side (usually the DS side) is too large, first fine-tune the bearing seat of the slot cover opening and closing frame to adjust the horizontality of the slot cover opening and closing frame. If the effect is still not achieved, return the slot cover opening and closing frame to the factory for plastic treatment and then adjust it on site; S15: The slot covers are numbered in sequence from 1 and opened in an alternating manner of odd and even numbers, i.e., first open the slot covers with odd numbers to the maximum position, and then open the slot covers with even numbers to the maximum position; when closing, the sequence is reversed, i.e., first close the slot covers with even numbers to the closed position, and then close the slot covers with odd numbers to the closed position, so that after the slot covers are opened, the rubber strips of adjacent slot covers do not interfere with each other, and after the slot covers are closed, the rubber strips of adjacent slot covers are dense and airtight.

[0007] The installation and adjustment of the slot cover and slot cover opening and closing frame is very important. The acid temperature is about 85℃, and the expansion of the PPH slot cover is different in cold and hot states, so the best effect after the slot cover is adjusted is: after closing the slot cover, the hydraulic cylinder stroke is fully used, but at this time the slot cover is just placed in the water seal groove of the tank body, in order to achieve the effect of sealing the hydrochloric acid mist, and the PPH slot cover also has a certain amount of expansion when it is heated and acid expands, so as not to damage the slot cover opening and closing device. After opening the slot cover, the hydraulic cylinder stroke is also fully used, and the safety pin when opening is just right, and there is no obstacle to inserting and removing the pin; at the same time, all the opened slot covers are neat and uniform, without a sense of unevenness.

[0008] The present invention can achieve the best effect after the tank cover is adjusted, that is, after closing the tank cover, the hydraulic cylinder stroke is fully used, but at this time the tank cover is just placed in the water seal groove of the tank body, which can not only achieve the effect of sealing hydrochloric acid mist, but also leave a certain amount of expansion when the PPH tank cover expands due to heat and acid, so as not to damage the tank cover opening and closing device. After opening the tank cover, the hydraulic cylinder stroke is also fully used, and the safety pin when opening is just aligned, and the pin can be inserted and removed without obstacles; at the same time, all the opened tank covers are neat and uniform, without uneven feeling.

[0009] The present invention has the following beneficial effects: it is applicable to the installation and adjustment of the slot cover opening and closing devices and the slot cover of all pickling units, acid rolling units and similar units; by properly learning the installation and adjustment method, the labor efficiency can be greatly improved; the slot cover adjustment time of a unit can be normally controlled within 7 days; at the same time, the expected effect is perfectly achieved, and the corrosion damage to the factory building, unit equipment and pipelines caused by the overflow of hydrochloric acid mist during the operation of the unit is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a top view schematic diagram of the present invention, Figure 2 is a schematic diagram of the slot cover covering the slot in the present invention, Figure 3 It is a schematic diagram of the safety pin naturally being inserted into the pin hole on the column of the slot cover opening and closing frame in the present invention. DETAILED DESCRIPTION

[0011] The present invention is further described below by means of specific examples. Example

[0012] A method for installing and adjusting a tank cover of a pickling unit, wherein the pickling section and the rinsing section are arranged opposite to and parallel to each other, such as Figure 1 and Figure 2 As shown: at least five slots 1 are sequentially arranged on the pickling section as pickling slots, at least five slots 1 are sequentially arranged on the rinsing section as rinsing slots, a rotating shaft 11 is horizontally arranged at the open edge of the slot 1, the slot cover 2 covers the open part of the slot 1, at least two cover ears 21 are arranged on the top of the slot cover 2, and cover ear holes are arranged on the cover ears 21, the bottom of the slot cover opening and closing frame 3 is rotatably sleeved on the rotating shaft 11, the top of the slot cover opening and closing frame 3 is provided with frame ears 31 equal in number to the cover ears 21, and the position of each frame ear 31 corresponds to the position of a cover ear 21, the cylinder body of the driving cylinder 4 is fixed on the ground on the side of the slot 1 provided with the rotating shaft 11, and the movable end of the piston rod of the driving cylinder 4 is rotatably connected to the middle part of the slot cover opening and closing frame 3, Follow the steps below to implement: S1: Do not connect the upper hanging ears 31 of the slot cover lifting and closing frame 3 and the safety pin of the slot cover 2, and adjust the slot cover 2 to a symmetrical position in a natural state; S2: The first hydraulic valve is poke, and the tank cover opening and closing frame 3 is moved alone. The tank cover opening and closing frame 3 is adjusted by adjusting the gasket at the bottom of the driving cylinder 4 to ensure the opening position of the tank cover opening and closing frame 3, such as Figure 3 As shown: the safety pin is naturally pinned into the pin hole 41 on the column of the slot cover opening and closing frame 3; S3: The second hydraulic valve is poke, and the tank cover opening and closing frame 3 is independently actuated. The tank cover opening and closing frame 3 is adjusted by adjusting the cover lifting ear 21 and the gasket to ensure the closed position of the tank cover opening and closing frame 3, so that the ear pin connecting the cover lifting ear 21 and the frame lifting ear 31 is naturally pinned into the cover lifting ear 21 and the frame lifting ear 31; S4: When the valve is hydraulically opened twice, the process is slow first and then fast, so as to avoid interference and collision between the slot cover 2 and the slot 1 during the opening and closing process of the slot cover 2; S5: The installation position of the cover lifting lug 21, the transmission side is a horizontal long hole, and the operation side is a vertical long hole; S6: Each tank cover 2 is provided with four cover lifting ears 21, which are specifically positioned and installed according to the tank cover 2 and the tank cover opening and closing frame 3 to prevent the tank cover 2 from moving left and right when opening and closing; S7: The gaskets of the cover lifting ears 21 are first removed and collected in one place, so that they can be added or removed as needed when adjusting the slot cover in the future; S8: When the tank cover 2 is closed, the driving cylinder 4 reduces the pressure to 70 bar through the pressure reducing valve, and when the tank cover 2 is opened, the system pressure is 140 bar; S9: Before the first valve poke, first poke the valve to fill the rodless chamber with hydraulic oil, and then poke the valve in the reverse direction to open the slot cover opening and closing frame 3; S10: If the slot cover opening and closing frame 3 vibrates during the last stroke when the slot cover 2 is closed, the reason is that the back pressure of the rod cavity is low, then the speed is appropriately reduced; S11: The debugging sequence is: open the safety pin → open and close the slot cover of the low-pressure valve → adjust the speed and pressure of the high-pressure valve → accurately position the slot cover → operate the slot cover on the panel and adjust the speed through hydraulic coordination → adjust the limit switch → interlock input; S12: After everything is done, weld the stopper at the corresponding position of the support of the cover lifting ear 21 and the bearing seat of the tank cover opening and closing frame 3. Pay attention to the protection of the PPH tank body and tank cover during the hot welding operation; S13: The tank cover 2 includes an outer cover and an inner cover. The center of the outer cover coincides with the center of the tank 1. If there is interference with the inner side of the tank 1 during the opening and closing process, the outer cover moves in opposite directions in a natural state when the cover ear 21 is not connected to the outer cover. The difference in the spacing between the two sides (WS and DS) and the water seal tank is not less than 10 mm (too small will cause interference with the tank body when opening and closing the tank cover); S14: After the slot cover 2 is closed, when the cover lifting lug 21 is installed, if the thickness difference between the gasket groups on the same side (generally the DS side) is too large, first fine-tune the bearing seat of the slot cover opening and closing frame 3 to adjust the horizontality of the slot cover opening and closing frame 3. If the effect is still not achieved, return the slot cover opening and closing frame 3 to the factory for plastic treatment and then adjust it on site; S15: The slot covers 2 are numbered in sequence from 1, and are opened in an alternating manner of odd and even numbers, i.e., first open the slot covers 2 with odd numbers to the maximum position, and then open the slot covers 2 with even numbers to the maximum position; when closing, the sequence is reversed, i.e., first close the slot covers 2 with even numbers to the closed position, and then close the slot covers 2 with odd numbers to the closed position, so that after the slot covers 2 are opened, the rubber strips of adjacent slot covers 2 do not interfere with each other, and after the slot covers 2 are closed, the rubber strips of adjacent slot covers 2 are dense and airtight.

Claims

1. A method for installing and adjusting a tank cover of a pickling machine unit, wherein a pickling section and a rinsing section are arranged opposite to each other and parallel to each other, at least five tanks (1) are sequentially arranged on the pickling section as pickling tanks, at least five tanks (1) are sequentially arranged on the rinsing section as rinsing tanks, a rotating shaft (11) is horizontally arranged at the open edge of the tank (1), a tank cover (2) covers the open part of the tank (1), at least two cover lifting ears (21) are arranged on the top of the tank cover (2), and a cover lifting ear hole is arranged on the cover lifting ear (21), The bottom of the slot cover opening and closing frame (3) is rotatably sleeved on the rotating shaft (11), the top of the slot cover opening and closing frame (3) is provided with frame lifting ears (31) whose number is equal to the cover lifting ears (21), and the position of each frame lifting ear (31) corresponds to the position of a cover lifting ear (21), the cylinder body of the driving oil cylinder (4) is fixed on the ground on the side of the slot (1) provided with the rotating shaft (11), and the movable end of the piston rod of the driving oil cylinder (4) is rotatably connected to the middle part of the slot cover opening and closing frame (3), Its characteristics are: Follow the steps below to implement: S1: first, without connecting the upper hanging ears (31) of the slot cover lifting and closing frame (3) and the safety pins of the slot cover (2), the slot cover (2) is adjusted to a symmetrical position relative to the slot body in a natural state; S2: The first hydraulic valve is poke, the hydraulic cylinder has oil in the rod chamber, and the slot cover opening and closing frame (3) is independently actuated. The slot cover opening and closing frame (3) is adjusted by adjusting the gasket at the bottom of the driving oil cylinder (4) to ensure the slot cover opening and closing frame (3) is in the open position, so that the safety pin is naturally pinned into the pin hole (41) on the column of the slot cover opening and closing frame (3); S3: The second hydraulic valve is poke, the tank cover opening and closing frame (3) is actuated independently, the rodless chamber of the hydraulic cylinder is supplied with oil, and the tank cover opening and closing frame (3) is adjusted by adjusting the tank cover lifting ear (21) and the gasket to ensure the closed position of the tank cover opening and closing frame (3), so that the ear pin connecting the cover lifting ear (21) and the frame lifting ear (31) is naturally pinned into the cover lifting ear (21) and the frame lifting ear (31); S4: When the valve is hydraulically opened twice, the steps of first slow and then fast are adopted to avoid interference and collision between the tank cover (2) and the tank body (1) during the opening and closing process of the tank cover (2); S5: The installation position of the slot cover lifting lug (21), the transmission side is a horizontal long hole, and the operation side is a vertical long hole; S6: Each tank cover (2) is provided with four cover lifting ears (21) to prevent the tank cover (2) from moving left and right when opening and closing; S7: The gaskets of the cover lifting ears (21) are first removed and collected in one place, so that they can be added or removed as needed when adjusting the tank cover in the future; S8: When the tank cover (2) is closed, the pressure in the rodless chamber of the driving cylinder (4) is reduced to 70 bar by the pressure reducing valve, and when the tank cover (2) is opened, the pressure in the rod chamber is the system pressure of 140 bar; S9: Before the first valve poke, first poke the valve to fill the rodless chamber with hydraulic oil, and then poke the valve in the opposite direction to open the slot cover opening and closing frame (3); S10: If the tank cover opening and closing frame (3) vibrates during the last stroke when the oil cylinder drives the tank cover (2) to close, the speed of the oil cylinder is reduced by adjusting the throttle valve; S11: The debugging sequence is: open the safety pin → open and close the slot cover of the low-pressure valve → adjust the speed and pressure of the high-pressure valve → accurately position the slot cover → operate the slot cover on the panel and adjust the speed through hydraulic coordination → adjust the limit switch → interlock input; S12: After everything is done, a stopper is welded at the corresponding position of the support of the slot cover lifting ear (21) and the bearing seat of the slot cover opening and closing frame (3).

2. The method for installing and adjusting the tank cover of the pickling unit according to claim 1 is characterized in that: The following steps are also included: S13: The slot cover (2) comprises an outer cover and an inner cover, the center of the outer cover coincides with the center of the slot (1), and if there is interference between the inner cover and the inner side of the slot (1) during the opening and closing process, when the outer cover is not connected to the cover hanging ear (21), the inner cover moves in opposite directions in a natural state, and the difference in the distance between the two sides and the water seal slot is not less than 10 mm; S14: After the tank cover (2) is closed, when the cover lifting lug (21) is installed, if the thickness difference between the gasket groups on the same side is too large, first fine-tune the bearing seat of the tank cover opening and closing frame (3) to adjust the horizontality of the tank cover opening and closing frame (3). If the effect is still not achieved, return the tank cover opening and closing frame (3) to the factory for plastic treatment and then adjust it on site; S15: The slot covers (2) are numbered in sequence from 1 and opened in an alternating manner of odd and even numbers, i.e., the slot covers (2) with odd numbers are opened to the maximum position first, and then the slot covers (2) with even numbers are opened to the maximum position; when closing, the sequence is reversed, i.e., the slot covers (2) with even numbers are closed to the closed position first, and then the slot covers (2) with odd numbers are closed to the closed position, so that after the slot covers (2) are opened, the rubber strips of adjacent slot covers (2) do not interfere with each other, and after the slot covers (2) are closed, the rubber strips of adjacent slot covers (2) are dense and airtight.

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