A backflow prevention stop valve for raw oil transportation in needle coke production

Abstract

The invention discloses a stop valve for preventing backflow of raw oil transportation for needle coke production, and relates to the technical field of stop valves. The stop valve for preventing backflow of raw oil transportation for needle coke production comprises a valve body and a valve cover arranged on a stop valve body, wherein a valve disc is slidably connected in the valve body, and a bracket is fixedly connected to the top of the valve cover, a valve stem is threadedly connected to the top of the bracket, and a handle is fixedly connected to the upper end of the valve stem. The stop valve for preventing backflow of raw oil transportation for needle coke production can provide a pre-tightening force to the valve disc after the valve disc is closed, which can not only improve the sealing effect of the stop valve body, but also reduce vibration and noise, and extend the service life of the stop valve body; it is convenient to adjust the pre-tightening force of the valve disc and the valve seat, and has stronger applicability; it can automatically clean the surface of the valve stem again to avoid the accumulation of dust and foreign matter, reduce the friction and wear of the valve stem, make the rotation of the valve stem smoother, and improve its use effect and life.

Description

Technical Field

[0001] The invention relates to the technical field of stop valves, in particular to a stop valve for preventing backflow of raw oil transportation used in needle coke production. Background Art

[0002] The anti-backflow stop valve for raw oil transportation in needle coke production is mainly used to ensure the one-way flow of raw oil during transportation and prevent backflow to ensure the normal progress of the production process. This stop valve is generally composed of a valve body, a valve cover, a valve disc, a valve stem, a handle and other parts. Its design and material selection are very important to ensure its reliability and safety. In the needle coke production process, the anti-backflow stop valve plays a key role. It can not only effectively prevent the backflow of raw oil, but also quickly cut off the fluid when necessary to prevent leakage and ensure the safety of operators. When in use, the valve stem is rotated by the handle to realize the lifting and lowering of the valve disc, thereby realizing the opening and closing of the valve.

[0003] However, when the existing raw oil transportation anti-backflow stop valve for needle coke production is in use, vibration and noise are likely to occur between the valve disc and the valve seat when closing, affecting the sealing effect and life. At the same time, the valve disc and the valve seat may become loose, and the fit between the valve disc and the valve seat is reduced. It is easy to become loose due to factors such as medium pressure and vibration, which in turn causes leakage and other problems, affecting its use effect. In addition, dust and foreign matter are easily accumulated on the surface of the valve stem, causing the valve to operate poorly or become stuck, affecting its use effect and life. Summary of the invention

[0004] The object of the present invention is to provide a backflow prevention stop valve for raw oil transportation for needle coke production, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a raw material oil transportation backflow prevention stop valve for needle coke production, comprising a valve body and a valve cover arranged on a stop valve body, a valve disc is slidably connected in the valve body, and a bracket is fixedly connected to the top of the valve cover, a valve stem is threadedly connected to the top of the bracket, and a handle is fixedly connected to the upper end of the valve stem, a movable disk is slidably connected in the valve cover, and the valve disc is connected to the bottom of the movable disk through a pre-tightening mechanism, the lower end of the valve stem is rotatably connected to the top of the movable disk, and a fixed plate is fixedly connected to the top of the movable disk, the upper end of the fixed plate passes through the top of the valve cover, and the fixed plate The side wall is provided with scale markings, the top of the valve disc is fixedly connected with a moving rod, and the upper end of the moving rod passes through the top of the fixed plate, the side wall of the fixed plate is fixedly connected with an L-shaped connecting plate, and the side wall of the connecting plate is connected with a moving block through an adjusting mechanism, and the side wall of the moving block is fixedly connected with a first pointer, the top of the valve cover is fixedly connected with a support plate, and the side wall of the support plate is fixedly connected with a second pointer, the side wall of the moving block is fixedly connected with a bell, and the side wall of the fixed plate is provided with a knocking mechanism for knocking the bell, and the bracket is provided with a cleaning mechanism for cleaning the surface of the valve stem.

[0006] Preferably, the pre-tightening mechanism includes two symmetrically arranged first sleeves fixedly connected to the bottom of the movable disk, and a first sleeve rod is inserted into the first sleeve, the lower end of the first sleeve rod is fixed to the top of the valve disc, and the side wall of each first sleeve is sleeved with a first spring.

[0007] Preferably, the adjusting mechanism includes a connecting block fixedly connected to the side wall of the connecting plate, and the top of the connecting block is fixedly connected to a second sleeve, a second sleeve is inserted in the second sleeve, and the upper end of the second sleeve is fixed to the bottom of the moving block, the bottom of the moving block is rotatably connected to a threaded rod, and the side wall of the threaded rod is threadedly connected to a threaded tube, the lower end of the threaded tube is fixed to the top of the connecting block, and the upper end of the threaded rod passes through the top of the moving block and is fixedly connected to a rocker.

[0008] Preferably, the knocking mechanism includes two symmetrically arranged support blocks fixedly connected to the side walls of the fixed plate, and the side walls of the support blocks are rotatably connected to a disc via a first rotating shaft, the side walls of the disc are fixedly connected to a plurality of protrusions arranged in an array, and the bottom of the support block is connected to a knocking rod via a first reset mechanism, the upper end of the knocking rod can slide on the side walls of the protrusion, and the rotation of the first rotating shaft is driven by a first driving mechanism.

[0009] Preferably, the first reset mechanism includes two symmetrically arranged first T-shaped guide rods fixedly connected to the bottom of the support block, and the side walls of the first T-shaped guide rods are sleeved with T-shaped plates, the knocking rod is fixedly inserted on the top of the T-shaped plate, and the side walls of each first T-shaped guide rod are sleeved with a reset spring.

[0010] Preferably, the first driving mechanism comprises a first gear fixedly sleeved on the side wall of the first rotating shaft, and the side wall of the connecting plate is fixedly connected with a first rack.

[0011] Preferably, the cleaning mechanism comprises two symmetrically arranged rotating sleeves, and the rotating sleeves are rotatably connected to the bracket, the inner side wall of each rotating sleeve is fixedly connected with a plurality of brushes arranged in an array, and the rotation of the rotating sleeve is driven by a second driving mechanism.

[0012] Preferably, the second driving mechanism comprises a second gear fixedly mounted on the side wall of each rotating sleeve, and the bracket is connected to two symmetrically arranged second racks via a second reset mechanism, and the movement of the second racks is pulled by a pulling mechanism.

[0013] Preferably, the second reset mechanism includes two symmetrically arranged connecting frames fixedly connected to the side walls of the bracket, and the side walls of each connecting frame are fixedly connected to two symmetrically arranged second T-shaped guide rods, the side walls of each second T-shaped guide rod are sleeved with a slider, the slider is fixed to the side wall of the second rack, and the side walls of each second T-shaped guide rod are sleeved with a second spring.

[0014] Preferably, the pulling mechanism includes two fixing frames fixedly connected to the side walls of the bracket, and the side walls of each fixing frame are rotatably connected to a winding disk via a second rotating shaft, the side wall fixing sleeve of the second rotating shaft is provided with a rubber wheel, and the rubber wheel slides on the side wall of the valve stem, the side walls of each fixing frame are fixedly connected to a plurality of pulleys, and the side walls of the pulleys are slidably connected to a pull rope, one end of the pull rope is fixed to the side wall of the winding disk, and the other end of the pull rope is fixed to the side wall of the second rack.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This kind of raw material oil transportation backflow prevention stop valve for needle coke production is provided with a pre-tightening mechanism, etc., when the stop valve body needs to be closed, the handle is turned, and the rotation of the handle drives the valve stem to rotate, thereby causing the valve stem to move downward and driving the movable plate to move downward. When the movable plate moves downward, the valve disc is driven to move by the pre-tightening mechanism, and the fixed plate and the movable rod move downward synchronously. When the valve disc abuts against the valve seat, when the movable plate continues to move downward, the first spring is gradually compressed, thereby providing a pre-tightening force for the valve disc, which can not only improve the sealing effect of the stop valve body, but also reduce vibration and noise, and extend the service life of the stop valve body. At the same time, the fixed plate moves downward along the side wall of the movable rod. At this time, the first gear rolls on the first rack. When the upper end of the knocking rod passes over the side wall of the protrusion, the knocking rod can move and reset under the action of the reset spring, and so on and so forth, the knocking rod can reciprocate up and down, and when the knocking rod contacts the side wall of the bell, a knocking effect can be formed. At this time, the operator is reminded to stop turning the handle, so as to control the relative displacement of the fixed plate and the moving rod, that is, the compression amount of the first spring, so as to control the compression amount of the first spring, and then control the pre-tightening force of the valve disc and the valve seat, so as to ensure the sealing effect while avoiding damage to the valve seat, and by observing the second pointer Whether it is aligned with the connecting block can determine whether the valve disc is closed in place, thereby ensuring the effect of its use; by setting an adjustment mechanism, when it is necessary to adjust the size of the preload force of the valve disc and the valve seat, turn the rocker, and the rotation of the rocker drives the rotation of the threaded rod, thereby driving the moving block to move up and down, and then driving the first pointer and the bell to move up and down, and by observing the corresponding scale marks, the relative displacement of the fixed plate and the moving rod can be adjusted, that is, the compression amount of the first spring is adjusted, and then the preload force of the valve disc and the valve seat is adjusted, which has stronger applicability; by setting a cleaning mechanism, when the valve disc moves downward to close, the valve stem moves downward, thereby driving the rubber wheel to rotate counterclockwise, and when the rubber wheel rotates, the reel is driven to rotate through the second rotating shaft, The pull rope can be reeled in, so as to pull the second rack to move in the direction close to the connecting frame, the second spring is compressed, and when the second rack moves, it drives the second gear to rotate, and then drives the rotating sleeve and the brush to rotate, so that the surface of the valve stem can be automatically cleaned. When the valve disc moves upward to open, the winding disk can rotate clockwise. At this time, the pull rope is loosened, and the second rack can move and reset in the direction away from the connecting frame under the action of the second spring, so that the second gear rotates and resets, and then drives the rotating sleeve and the brush to rotate and reset, so that the surface of the valve stem can be automatically cleaned again, avoiding the accumulation of dust and foreign matter, reducing the friction and wear of the valve stem, making the rotation of the valve stem smoother, and improving its use effect and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a partial cross-sectional structural schematic diagram of the valve body and the valve cover in the present invention;

[0019] Figure 3 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0022] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at D in the middle;

[0023] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at E in the middle.

[0024] In the figure: 1. stop valve body; 101. valve body; 102. valve cover; 103. valve disc; 104. bracket; 105. valve stem; 106. handle; 2. preload mechanism; 201. first sleeve; 202. first set of rods; 203. first spring; 3. adjustment mechanism; 301. connecting block; 302. second sleeve; 303. second set of rods; 304. threaded rod; 305. threaded pipe; 307. rocker; 4. knocking mechanism; 401. support block; 402. first rotating shaft; 403. disc; 404. protrusion; 405. knocking rod; 5. first driving mechanism; 501. first gear; 502. connecting plate; 503. first rack; 6. first reset mechanism; 601. first T shaped guide rod; 602, T-shaped plate; 603, reset spring; 7, cleaning mechanism; 701, rotating sleeve; 702, brush; 8, second driving mechanism; 801, second gear; 802, second rack; 9, second reset mechanism; 901, connecting frame; 902, second T-shaped guide rod; 903, slider; 904, second spring; 10, pulling mechanism; 1001, fixing frame; 1002, second rotating shaft; 1003, winding disk; 1004, rubber wheel; 1005, pull rope; 1006, pulley; 11, moving disk; 12, fixing plate; 13, scale mark; 14, moving rod; 15, moving block; 16, first pointer; 17, bell; 18, support plate; 19, second pointer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 7 The present invention provides a technical solution: a raw material oil transport backflow prevention stop valve for needle coke production, comprising a valve body 101 and a valve cover 102 arranged on a stop valve body 1, a valve flap 103 is slidably connected in the valve body 101, and a bracket 104 is fixedly connected to the top of the valve cover 102, a valve stem 105 is threadedly connected to the top of the bracket 104, and a handle 106 is fixedly connected to the upper end of the valve stem 105, a movable disk 11 is slidably connected in the valve cover 102, and the valve flap 103 is preloaded by a preload mechanism. The valve structure 2 is connected to the bottom of the movable disk 11, the lower end of the valve stem 105 is rotatably connected to the top of the movable disk 11, and the top of the movable disk 11 is fixedly connected with a fixed plate 12, the upper end of the fixed plate 12 penetrates the top of the valve cover 102, and the side wall of the fixed plate 12 is provided with a scale mark 13, the top of the valve disc 103 is fixedly connected with a movable rod 14, and the upper end of the movable rod 14 penetrates the top of the fixed plate 12, and the side wall of the fixed plate 12 is fixedly connected with an L-shaped connecting plate 502, and The side wall of the connecting plate 502 is connected to the moving block 15 through the adjusting mechanism 3, and the side wall of the moving block 15 is fixedly connected to the first pointer 16, the top of the valve cover 102 is fixedly connected to the support plate 18, and the side wall of the support plate 18 is fixedly connected to the second pointer 19, the side wall of the moving block 15 is fixedly connected to the bell 17, and the side wall of the fixed plate 12 is provided with a knocking mechanism 4 for knocking the bell 17, and the bracket 104 is provided with a cleaning mechanism for cleaning the surface of the valve stem 105 7. After the valve flap 103 is closed, a pre-tightening force can be provided to the valve flap 103, which can not only improve the sealing effect of the stop valve body 1, but also reduce vibration and noise, and extend the service life of the stop valve body 1; it is easy to adjust the pre-tightening force between the valve flap 103 and the valve seat, and it has stronger applicability; the surface of the valve stem 105 can be automatically cleaned again to avoid the accumulation of dust and foreign matter, reduce the friction and wear of the valve stem 105, and make the rotation of the valve stem 105 smoother, thereby improving its use effect and life.

[0027] See also Figure 4The pre-tightening mechanism 2 includes two symmetrically arranged first sleeves 201 fixedly connected to the bottom of the movable disk 11, and a first sleeve rod 202 is inserted in the first sleeve 201, and the lower end of the first sleeve rod 202 is fixed to the top of the valve disc 103, and the side wall of each first sleeve 201 is sleeved with a first spring 203. When the valve disc 103 is against the valve seat, when the movable disk 11 continues to move downward, the first spring 203 is gradually compressed, thereby providing a pre-tightening force for the valve disc 103, which can not only improve the sealing effect of the stop valve body 1, but also reduce vibration and noise, and extend the service life of the stop valve body 1.

[0028] See also Figure 7 The adjusting mechanism 3 includes a connecting block 301 fixedly connected to the side wall of the connecting plate 502, and the top of the connecting block 301 is fixedly connected with a second sleeve 302, a second sleeve 303 is inserted into the second sleeve 302, and the upper end of the second sleeve 303 is fixed to the bottom of the moving block 15, the bottom of the moving block 15 is rotatably connected with a threaded rod 304, and the side wall of the threaded rod 304 is threadedly connected with a threaded tube 305, the lower end of the threaded tube 305 is fixed to the top of the connecting block 301, and the upper end of the threaded rod 304 passes through the top of the moving block 15 and is fixed A rocking wheel 307 is fixedly connected. When it is necessary to adjust the preload force of the valve disc 103 and the valve seat, the rocking wheel 307 is rotated. The rotation of the rocking wheel 307 drives the rotation of the threaded rod 304, thereby driving the movable block 15 to move up and down, and then driving the first pointer 16 and the bell 17 to move up and down. By observing the corresponding scale mark 13, the relative displacement of the fixed plate 12 and the movable rod 14 can be adjusted, that is, the compression amount of the first spring 203 is adjusted, and then the preload force of the valve disc 103 and the valve seat is adjusted, which has stronger applicability.

[0029] See also Figure 7The knocking mechanism 4 includes two symmetrically arranged support blocks 401 fixedly connected to the side walls of the fixed plate 12, and the side walls of the support blocks 401 are rotatably connected with a disc 403 through a first rotating shaft 402, and the side walls of the disc 403 are fixedly connected with a plurality of array-arranged protrusions 404, and the bottom of the support block 401 is connected with a knocking rod 405 through a first reset mechanism 6, and the upper end of the knocking rod 405 can slide on the side walls of the protrusions 404, and the rotation of the first rotating shaft 402 is driven by the first driving mechanism 5. When the valve disc 103 is against the valve seat, when the movable disk 11 continues to move downward, the first spring 203 is gradually compressed. At the same time, the fixed plate 12 moves downward along the side wall of the movable rod 14. At this time, the first rotating shaft 402 is driven to rotate by the first driving mechanism 5, and the first rotating shaft The rotation of 402 drives the rotation of the disc 403 and the protrusion 404. When the protrusion 404 abuts against the upper end of the knocking rod 405, the knocking rod 405 is pushed to move downward. When the upper end of the knocking rod 405 passes over the side wall of the protrusion 404, the knocking rod 405 can move and reset under the action of the first reset mechanism 6. This reciprocating movement can make the knocking rod 405 move up and down. When the knocking rod 405 abuts against the side wall of the bell 17, a knocking effect can be formed. At this time, the operator is reminded to stop rotating the handle 106, which is convenient for controlling the relative displacement of the fixed plate 12 and the moving rod 14, that is, the compression amount of the first spring 203, so as to control the compression amount of the first spring 203, and then control the pre-tightening force of the valve disc 103 and the valve seat, thereby ensuring the sealing effect while avoiding damage to the valve seat.

[0030] See also Figure 7 The first reset mechanism 6 includes two symmetrically arranged first T-shaped guide rods 601 fixedly connected to the bottom of the support block 401, and the side walls of the first T-shaped guide rods 601 are sleeved with T-shaped plates 602, the knocking rod 405 is fixedly inserted on the top of the T-shaped plate 602, and the side walls of each first T-shaped guide rod 601 are sleeved with a reset spring 603, which guides and resets the movement of the knocking rod 405.

[0031] See also Figure 6 and Figure 7 The first driving mechanism 5 includes a first gear 501 fixedly mounted on the side wall of the first rotating shaft 402, and the side wall of the connecting plate 502 is fixedly connected to the first rack 503. When the fixed plate 12 moves downward along the side wall of the moving rod 14, the first gear 501 rolls on the first rack 503, thereby causing the first rotating shaft 402 to rotate.

[0032] See also Figure 5The cleaning mechanism 7 includes two symmetrically arranged rotating sleeves 701, and the rotating sleeves 701 are rotatably connected to the bracket 104. The inner side walls of each rotating sleeve 701 are fixedly connected with a plurality of brushes 702 arranged in an array, and the rotation of the rotating sleeve 701 is driven by the second driving mechanism 8. When the valve disc 103 moves downward, the rotating sleeve 701 and the brush 702 are driven to rotate by the second driving mechanism 8, so that the surface of the valve stem 105 can be automatically cleaned again to avoid the accumulation of dust and foreign matter, reduce the friction and wear of the valve stem 105, make the rotation of the valve stem 105 smoother, and improve its use effect and life.

[0033] See also Figure 5 The second driving mechanism 8 includes a second gear 801 fixedly sleeved on the side wall of each rotating sleeve 701, and two symmetrically arranged second racks 802 are connected to the bracket 104 through a second reset mechanism 9, and the movement of the second rack 802 is pulled by the pulling mechanism 10, and the second rack 802 is moved by pulling the pulling mechanism 10. When the second rack 802 moves, it drives the second gear 801 to rotate, and then drives the rotating sleeve 701 and the brush 702 to rotate.

[0034] See also Figure 5 The second reset mechanism 9 includes two symmetrically arranged connecting frames 901 fixedly connected to the side walls of the bracket 104, and the side walls of each connecting frame 901 are fixedly connected to two symmetrically arranged second T-shaped guide rods 902, and the side walls of each second T-shaped guide rod 902 are sleeved with a slider 903, and the slider 903 is fixed to the side wall of the second rack 802, and the side walls of each second T-shaped guide rod 902 are sleeved with a second spring 904, which guides and resets the movement of the second rack 802.

[0035] See also Figure 3-Figure 6 The pulling mechanism 10 includes two fixing frames 1001 fixedly connected to the side wall of the bracket 104, and the side wall of each fixing frame 1001 is rotatably connected to a winding disk 1003 through a second rotating shaft 1002, and the side wall of the second rotating shaft 1002 is fixedly sleeved with a rubber wheel 1004, and the rubber wheel 1004 slides on the side wall of the valve stem 105, and the side wall of each fixing frame 1001 is fixedly connected to a plurality of pulleys 1006, and the side wall of the pulley 1006 is slidably connected to a pull rope 1005, and the pull rope 100 5 is fixed to the side wall of the winding disk 1003, and the other end of the pull rope 1005 is fixed to the side wall of the second rack 802. When the valve flap 103 moves downward to close, the valve stem 105 moves downward, thereby driving the rubber wheel 1004 to rotate counterclockwise. When the rubber wheel 1004 rotates, the winding disk 1003 is driven to rotate through the second rotating shaft 1002, and the pull rope 1005 can be reeled up, thereby pulling the second rack 802 to move in the direction close to the connecting frame 901.

[0036] Working principle: When the stop valve body 1 needs to be closed during use, the handle 106 is turned. The rotation of the handle 106 drives the valve stem 105 to rotate, so that the valve stem 105 moves downward, and drives the movable disk 11 to move downward. When the movable disk 11 moves downward, the valve flap 103 is driven to move by the pre-tightening mechanism 2, and the fixed plate 12 and the movable rod 14 move downward synchronously. When the valve flap 103 abuts against the valve seat, when the movable disk 11 continues to move downward, the first spring 203 is gradually compressed, so as to provide a pre-tightening force for the valve flap 103, which can not only improve the sealing effect of the stop valve body 1, but also reduce vibration and noise, and extend the service life of the stop valve body 1.

[0037] At the same time, the fixed plate 12 moves downward along the side wall of the moving rod 14. At this time, the first gear 501 rolls on the first rack 503, so that the first rotating shaft 402 rotates. The rotation of the first rotating shaft 402 drives the rotation of the disc 403 and the protrusion 404. When the protrusion 404 abuts against the upper end of the knocking rod 405, the knocking rod 405 is pushed to move downward. At the same time, the reset spring 603 is compressed. When the upper end of the knocking rod 405 passes over the side wall of the protrusion 404, the knocking rod 405 can move and reset under the action of the reset spring 603, and so on. The knocking rod 405 can move back and forth up and down. When the rod 405 abuts against the side wall of the bell 17, a knocking effect can be formed. At this time, the operator is reminded to stop turning the handle 106, which is convenient for controlling the relative displacement of the fixed plate 12 and the movable rod 14, that is, the compression amount of the first spring 203, so as to control the compression amount of the first spring 203, and then control the pre-tightening force of the valve flap 103 and the valve seat, thereby ensuring the sealing effect and avoiding damage to the valve seat. In addition, by observing whether the second pointer 19 is aligned with the connecting block 301, it can be judged whether the valve flap 103 is closed in place, thereby ensuring the effect of its use. When the valve flap 103 is closed in place, the second pointer 19 can be aligned with the connecting block 301;

[0038] When the preload force between the valve disc 103 and the valve seat needs to be adjusted, the rocker 307 is rotated. The rotation of the rocker 307 drives the rotation of the threaded rod 304, thereby driving the moving block 15 to move up and down, and then driving the first pointer 16 and the bell 17 to move up and down. By observing the corresponding scale mark 13, the relative displacement between the fixed plate 12 and the moving rod 14 can be adjusted, that is, the compression amount of the first spring 203 is adjusted, and then the preload force between the valve disc 103 and the valve seat is adjusted, which has stronger applicability.

[0039] When the valve disc 103 moves downward to close, the valve stem 105 moves downward, thereby driving the rubber wheel 1004 to rotate counterclockwise. When the rubber wheel 1004 rotates, the reel 1003 is driven to rotate through the second rotating shaft 1002, so that the pull rope 1005 can be reeled up, thereby pulling the second rack 802 to move in the direction close to the connecting frame 901. The second spring 904 is compressed, and when the second rack 802 moves, it drives the second gear 801 to rotate, thereby driving the rotating sleeve 701 and the brush 702 to rotate, so that the surface of the valve stem 105 can be automatically cleaned;

[0040] When the valve disc 103 moves upward to open, the winding disk 1003 can rotate clockwise. At this time, the pull rope 1005 is loosened, and the second rack 802 can move and reset in the direction away from the connecting frame 901 under the action of the second spring 904, so that the second gear 801 rotates and resets, and then drives the rotating sleeve 701 and the brush 702 to rotate and reset, so that the surface of the valve stem 105 can be automatically cleaned again to avoid the accumulation of dust and foreign matter, reduce the friction and wear of the valve stem 105, make the rotation of the valve stem 105 smoother, and improve its use effect and life.

Claims

1. A backflow prevention stop valve for raw oil transportation for needle coke production, comprising a valve body (101) and a valve cover (102) arranged on a stop valve body (1), a valve flap (103) being slidably connected in the valve body (101), a bracket (104) being fixedly connected to the top of the valve cover (102), a valve stem (105) being threadedly connected to the top of the bracket (104), and a handle (106) being fixedly connected to the upper end of the valve stem (105), characterized in that: A movable disk (11) is slidably connected inside the valve cover (102), and the valve flap (103) is connected to the bottom of the movable disk (11) via a pre-tightening mechanism (2); the lower end of the valve stem (105) is rotatably connected to the top of the movable disk (11), and the top of the movable disk (11) is fixedly connected to a fixed plate (12), the upper end of the fixed plate (12) is arranged through the top of the valve cover (102), and a scale mark (13) is arranged on the side wall of the fixed plate (12); the top of the valve flap (103) is fixedly connected to a movable rod (14), and the upper end of the movable rod (14) is arranged through the top of the fixed plate (12), and the side wall of the fixed plate (12) is fixedly connected to the movable rod (14). An L-shaped connecting plate (502) is connected, and the side wall of the connecting plate (502) is connected to a moving block (15) through an adjusting mechanism (3), and the side wall of the moving block (15) is fixedly connected to a first pointer (16), the top of the valve cover (102) is fixedly connected to a support plate (18), and the side wall of the support plate (18) is fixedly connected to a second pointer (19), the side wall of the moving block (15) is fixedly connected to a bell (17), and the side wall of the fixed plate (12) is provided with a knocking mechanism (4) for knocking the bell (17), and the bracket (104) is provided with a cleaning mechanism (7) for cleaning the surface of the valve stem (105); The adjusting mechanism (3) comprises a connecting block (301) fixedly connected to the side wall of the connecting plate (502), and a second sleeve (302) is fixedly connected to the top of the connecting block (301), a second sleeve (303) is inserted into the second sleeve (302), and the upper end of the second sleeve (303) is fixed to the bottom of the moving block (15), a threaded rod (304) is rotatably connected to the bottom of the moving block (15), and a threaded tube (305) is threadedly connected to the side wall of the threaded rod (304), the lower end of the threaded tube (305) is fixed to the top of the connecting block (301), and the upper end of the threaded rod (304) passes through the top of the moving block (15) and is fixedly connected to a rocker (307); The knocking mechanism (4) comprises two symmetrically arranged support blocks (401) fixedly connected to the side walls of the fixed plate (12), and the side walls of the support blocks (401) are rotatably connected to a disk (403) via a first rotating shaft (402), the side walls of the disk (403) are fixedly connected to a plurality of protrusions (404) arranged in an array, and the bottom of the support block (401) is connected to a knocking rod (405) via a first reset mechanism (6), the upper end of the knocking rod (405) can slide on the side walls of the protrusions (404), and the rotation of the first rotating shaft (402) is driven by a first driving mechanism (5); The first reset mechanism (6) comprises two symmetrically arranged first T-shaped guide rods (601) fixedly connected to the bottom of the support block (401), and the side walls of the first T-shaped guide rods (601) are sleeved with T-shaped plates (602), the knocking rod (405) is fixedly inserted on the top of the T-shaped plate (602), and the side walls of each first T-shaped guide rod (601) are sleeved with a reset spring (603); The first driving mechanism (5) comprises a first gear (501) fixedly sleeved on the side wall of the first rotating shaft (402), and a first rack (503) is fixedly connected to the side wall of the connecting plate (502); The cleaning mechanism (7) comprises two symmetrically arranged rotating sleeves (701), and the rotating sleeves (701) are rotatably connected to the bracket (104); the inner side wall of each rotating sleeve (701) is fixedly connected to a plurality of brushes (702) arranged in an array, and the rotation of the rotating sleeve (701) is driven by a second driving mechanism (8); The second driving mechanism (8) comprises a second gear (801) fixedly sleeved on the side wall of each rotating sleeve (701); the bracket (104) is connected to two symmetrically arranged second racks (802) via a second reset mechanism (9); and the movement of the second racks (802) is pulled by a pulling mechanism (10); The second reset mechanism (9) comprises two symmetrically arranged connecting frames (901) fixedly connected to the side wall of the bracket (104), and the side wall of each connecting frame (901) is fixedly connected to two symmetrically arranged second T-shaped guide rods (902), the side wall of each second T-shaped guide rod (902) is sleeved with a slider (903), the slider (903) is fixed to the side wall of the second rack (802), and the side wall of each second T-shaped guide rod (902) is sleeved with a second spring (904); The pulling mechanism (10) comprises two fixing frames (1001) fixedly connected to the side wall of the bracket (104), and the side wall of each fixing frame (1001) is rotatably connected to a winding disk (1003) via a second rotating shaft (1002), a side wall fixing sleeve of the second rotating shaft (1002) is provided with a rubber wheel (1004), and the rubber wheel (1004) slides on the side wall of the valve stem (105), and the side wall of each fixing frame (1001) is fixedly connected to a plurality of pulleys (1006), and the side wall of the pulley (1006) is slidably connected to a pull rope (1005), one end of the pull rope (1005) is fixed to the side wall of the winding disk (1003), and the other end of the pull rope (1005) is fixed to the side wall of the second rack (802).

2. The backflow prevention stop valve for raw oil transportation for needle coke production according to claim 1, characterized in that: The pre-tightening mechanism (2) comprises two symmetrically arranged first sleeves (201) fixedly connected to the bottom of the movable plate (11), and a first sleeve rod (202) is inserted into the first sleeve (201), the lower end of the first sleeve rod (202) is fixed to the top of the valve flap (103), and the side wall of each first sleeve (201) is sleeved with a first spring (203).

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