An environmentally friendly blind plate valve for gas pipelines

Abstract

The invention discloses an environment-friendly blind plate valve for a gas pipeline, belonging to the technical field of blind plate valves, comprising a base, a front flange, a rear flange and an "8"-shaped blind plate located between the front flange and the rear flange, the "8"-shaped blind plate comprising a blind plate end and a blind hole end, the base is symmetrically provided with slide grooves, the bottoms of the front flange and the rear flange are both fixed with slide rods, the bottom ends of the slide rods are slidably connected with the slide grooves, the front flange and the rear flange are fixedly connected by bolts, and the "8"-shaped blind plate is rotatably connected with one of the bolts; two L-shaped rods are fixed on the base, one end of the two L-shaped rods is jointly installed with a first fixing plate, two fixing blocks are fixed on the side wall of the first fixing plate, and one end of the two fixing blocks is jointly fixed with a second fixing plate; the invention reduces the workload of operators, alleviates the burden, and can control the gas flow in the pipeline, avoid excessive gas delivery, and save energy and protect the environment.

Description

Technical Field

[0001] The invention relates to the technical field of blind plate valves, and in particular to an environmentally friendly blind plate valve for a gas pipeline. Background Art

[0002] Blind plate valves are widely used in coal gasification, coal chemical industry, metallurgy, ceramics and other industries in the field of coal gas transportation. As a gas medium flow regulation or cut-off device, it solves the problems of scaling, blockage, shaft sticking, loose switch and so on in gas transportation.

[0003] Although blind plate valves are widely used and have many advantages in many applications, they still have some disadvantages: traditional blind plate valves are difficult to control the flow rate of gas in the pipeline, and there are only two states: fully open and closed. This brings great inconvenience to users and will lead to excessive gas delivery, which is not conducive to energy conservation and environmental protection. In addition, most blind plate valves require manual operation to open or close. The operator needs to remove the flange first and then adjust the blind plate, which increases the workload of the operator and may be inconvenient in situations where frequent operations are required. Summary of the invention

[0004] The purpose of the present invention is to provide an environmentally friendly blind plate valve for a gas pipeline to solve the following technical problems: traditional blind plate valves are difficult to control the flow rate of gas in the pipeline, and only have two states: fully open and closed, and most blind plate valves require manual operation to achieve switching.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An environmentally friendly blind plate valve for a gas pipeline comprises a base, a front flange, a rear flange and an "8"-shaped blind plate located between the front flange and the rear flange, the "8"-shaped blind plate comprises a blind plate end and a blind hole end, the base is symmetrically provided with slide grooves, the bottoms of the front flange and the rear flange are both fixed with slide rods, the bottom ends of the slide rods are slidably connected to the slide grooves, the front flange and the rear flange are fixedly connected by bolts, and the "8"-shaped blind plate is rotatably connected to one of the bolts;

[0007] Two L-shaped rods are fixed on the base, and a first fixing plate is commonly installed at one end of the two L-shaped rods. Two fixing blocks are fixed on the side wall of the first fixing plate, and a second fixing plate is commonly fixed at one end of the two fixing blocks. A round hole is opened on the second fixing plate, and the round hole has the same size as the blind hole of the "8"-shaped blind plate. A gear ring is fixed on the "8"-shaped blind plate, and baffles are fixed on both sides of the blind hole end of the "8"-shaped blind plate. A driving mechanism is arranged on one side of the first fixing plate for driving the gear ring to rotate.

[0008] As a further solution of the present invention: the driving mechanism includes a mounting plate fixed on two L-shaped rods, a motor seat is installed on the mounting plate, a driving motor is installed on the motor seat, the output shaft of the driving motor is connected to the first rotating shaft, a second rotating shaft is rotatably installed on the first fixed plate, a gear is installed at one end of the second rotating shaft, the gear is meshed with a ring gear, and a linkage mechanism is arranged between the other end of the second rotating shaft and the first rotating shaft, so that the first rotating shaft can drive the second rotating shaft to rotate.

[0009] As a further solution of the present invention: the linkage mechanism includes a disc fixed at one end of the first rotating shaft, an active push block is fixed on the side wall of the disc away from the first rotating shaft, a driven push block is fixed on the second rotating shaft, a through hole is opened on the driven push block, an arc rod is movably arranged in the through hole, one end of the arc rod is fixed on the active push block, a first spring is mounted on the arc rod, and the first spring is located between the active push block and the driven push block.

[0010] As a further solution of the present invention: a U-shaped rod is movably provided on the first fixed plate, and a limiting mechanism is fixed at one end of the U-shaped rod for limiting the gear ring.

[0011] As a further solution of the present invention: the limiting mechanism includes a limiting plate fixed to one end of the U-shaped rod, and a plurality of limiting teeth are fixed to the bottom of the limiting plate.

[0012] As a further solution of the present invention: an elliptical block is fixed on the first rotating shaft, a cylinder with an opening at one end is fixed on the mounting plate, a first piston is arranged in the cylinder, a push rod is fixed to one side wall of the first piston, a second spring is connected to the other side wall, a push plate is fixed to one end of the push rod, an end of the cylinder away from the opening is fixed to the outlet pipe, a box body is fixed on the top of the outlet pipe, one end of the U-shaped rod extends into the box body and is connected to the second piston, the bottom of one side of the box body is connected to the exhaust pipe, and a throttle valve is installed on the exhaust pipe.

[0013] As a further solution of the present invention: a first one-way valve is installed on the air outlet pipe, an air inlet pipe is also connected to the cylinder, and a second one-way valve is installed on the air inlet pipe.

[0014] Beneficial effects of the present invention:

[0015] (1) The present invention can automatically open and close the blind plate valve by setting the first fixed plate, the second fixed plate, the gear ring, the driving mechanism and the baffle plate, and can also control the gas flow rate by assisting the baffle plate to shield the pipeline. A circular hole is formed on the second fixed plate. When the blind plate end of the "8"-shaped blind plate rotates to the circular hole, the opening size of the pipeline can be directly determined, thereby controlling the gas flow rate and achieving energy saving and environmental protection.

[0016] (2) The first fixing plate and the second fixing plate of the present invention can also limit the position of the "8"-shaped blind plate to ensure stability during replacement. This is because during disassembly, the front flange and the rear flange will automatically separate, causing the "8"-shaped blind plate to deviate, and when the "8"-shaped blind plate is rotated, it is easy to cause wear, which affects the service life;

[0017] (3) The present invention sets a linkage mechanism so that the first rotating shaft and the second rotating shaft will not rotate synchronously. In cooperation with the limiting mechanism, when opening or closing the blind plate valve, the limiting mechanism is first separated from the gear ring, and then the "8"-shaped blind plate is rotated, so that no interference will occur. In addition, the limiting mechanism can lock the "8"-shaped blind plate to avoid gas leakage, and the safety is high.

[0018] (4) The present invention arranges a cylinder, a box, an elliptical block, a first piston, a second piston and other structures. When the first rotating shaft rotates, the air pressure is first used to push the U-shaped rod up. After the blind plate valve is opened or closed, the U-shaped rod automatically descends to lock the gear ring. This is simple, practical and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the structure of the overall first viewing angle of the present invention;

[0021] Figure 2 is a schematic structural diagram of the overall second viewing angle of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the first fixing plate and the second fixing plate of the present invention in a disassembled state;

[0023] Figure 4 It is a structural schematic diagram of the first fixing plate and the mounting plate of the present invention;

[0024] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0025] Figure 6 It is a structural schematic diagram of the linkage mechanism of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the gear ring, gear and first fixed plate of the present invention;

[0027] Figure 8 yes Figure 7 The enlarged view of point A in the middle;

[0028] Fig. 9 It is a schematic diagram of the internal structure of the cylinder and the box body of the present invention.

[0029] In the figure: 1, base; 2, front flange; 3, rear flange; 4, "8" shaped blind plate; 5, bolt; 6, slide bar; 7, L-shaped bar; 8, first fixing plate; 9, fixing block; 10, second fixing plate; 11, round hole; 12, gear ring; 13, baffle; 14, driving mechanism; 1401, mounting plate; 1402, motor seat; 1403, driving motor; 1404, first rotating shaft; 1405, disc; 1406, active push block; 1407, first Second rotating shaft; 1408, driven push block; 1409, arc rod; 1410, first spring; 1411, elliptical block; 15, gear; 16, cylinder; 17, first piston; 18, push rod; 19, push plate; 20, second spring; 21, outlet pipe; 22, inlet pipe; 23, first one-way valve; 24, second one-way valve; 25, box body; 26, second piston; 27, U-shaped rod; 28, exhaust pipe; 29, throttle valve; 30, limit mechanism. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-3As shown, the present invention is an environmentally friendly blind plate valve for gas pipelines, comprising a base 1, a front flange 2, a rear flange 3 and an "8"-shaped blind plate 4 located between the front flange 2 and the rear flange 3, the "8"-shaped blind plate 4 comprising a blind plate end and a blind hole end, the base 1 is symmetrically provided with slide grooves, the bottoms of the front flange 2 and the rear flange 3 are both fixed with slide rods 6, the bottom ends of the slide rods 6 are slidably connected to the slide grooves, the front flange 2 and the rear flange 3 are fixedly connected by bolts 5, and the "8"-shaped blind plate 4 is rotatably connected to one of the bolts 5; two L-shaped rods 7 are fixed to the base 1, one end of the two L-shaped rods 7 is jointly installed with a first fixed plate 8, two fixed blocks 9 are fixed on the side wall of the first fixed plate 8, one end of the two fixed blocks 9 is jointly fixed with a second fixed plate 10, the second fixed plate 10 is provided with a circular hole 11, and the circular hole 11 is connected to the "8"-shaped blind plate The blind holes of the "8"-shaped blind plate 4 have the same size. A gear ring 12 is fixed on the "8"-shaped blind plate 4, and baffles 13 are fixed on both sides of the blind hole end of the "8"-shaped blind plate 4. A driving mechanism 14 is provided on one side of the first fixed plate 8 for driving the gear ring 12 to rotate; when it is necessary to open the blind plate valve, the driving mechanism 14 is used to drive the gear ring 12 to rotate, so that the "8"-shaped blind plate 4 rotates. When the "8"-shaped blind plate 4 rotates 180°, the blind plate valve is fully opened. If it is necessary to control the flow rate of the coal gas, due to the provision of two baffles 13, when the blind hole end of the "8"-shaped blind plate 4 continues to move, the baffle 13 can block the pipeline to prevent leakage, and at this time, the blind plate end of the "8"-shaped blind plate 4 will overlap with the circular hole 11. By observing the overlapping area between the circular hole 11 and the blind plate end, the opening size of the pipeline can be judged, thereby achieving control of the gas flow rate.

[0032] See also Figure 3-6 The driving mechanism 14 includes a mounting plate 1401 fixed on the two L-shaped rods 7, a motor seat 1402 is installed on the mounting plate 1401, a driving motor 1403 is installed on the motor seat 1402, the output shaft of the driving motor 1403 is connected to the first rotating shaft 1404, a second rotating shaft 1407 is rotatably installed on the first fixed plate 8, a gear 15 is installed at one end of the second rotating shaft 1407, the gear 15 is meshed with the ring gear 12, and a linkage mechanism is arranged between the other end of the second rotating shaft 1407 and the first rotating shaft 1404, so that the first rotating shaft 1404 can drive the second rotating shaft 1407 to rotate; start the driving motor 1403 to drive the first rotating shaft 1404 to rotate, and under the rotation of the linkage mechanism, the second rotating shaft 1407 will also rotate, thereby driving the gear 15 to rotate and driving the ring gear 12 to rotate.

[0033] See also Figure 5-6The linkage mechanism includes a disk 1405 fixed at one end of the first rotating shaft 1404, an active push block 1406 is fixed on the side wall of the disk 1405 away from the first rotating shaft 1404, a driven push block 1408 is fixed on the second rotating shaft 1407, a through hole is opened on the driven push block 1408, an arc rod 1409 is movably arranged in the through hole, one end of the arc rod 1409 is fixed on the active push block 1406, and a first spring 1410 is sleeved on the arc rod 1409, and the first spring 1410 is positioned When the first rotating shaft 1404 rotates, it drives the disc 1405 and the active pushing block 1406 to rotate. When the active pushing block 1406 rotates, it first pushes the arc rod 1409 to move in the through hole of the driven pushing block 1408 and squeezes the first spring 1410. When the active pushing block 1406 contacts the driven pushing block 1408, it will drive the second rotating shaft 1407 to rotate. In other words, the first rotating shaft 1404 and the second rotating shaft 1407 do not rotate synchronously.

[0034] See also Figure 7-8 A U-shaped rod 27 is movably provided on the first fixed plate 8, and a limiting mechanism 30 is fixed at one end of the U-shaped rod 27 for limiting the gear ring 12. The limiting mechanism 30 includes a limiting plate fixed at one end of the U-shaped rod 27, and a plurality of limiting teeth are fixed at the bottom of the limiting plate. The limiting mechanism 30 can lock the gear ring 12, thereby locking the "8"-shaped blind plate 4 to ensure stability and avoid gas leakage.

[0035] See also Figure 4 , 5, 8, 9, an elliptical block 1411 is fixed on the first rotating shaft 1404, a cylinder 16 with an opening at one end is fixed on the mounting plate 1401, a first piston 17 is arranged in the cylinder 16, a push rod 18 is fixed to one side wall of the first piston 17, a second spring 20 is connected to the other side wall, a push plate 19 is fixed to one end of the push rod 18, an end of the cylinder 16 away from the opening is fixed to the outlet pipe 21, a box body 25 is fixed to the top of the outlet pipe 21, one end of the U-shaped rod 27 extends into the box body 25 and is connected to the second piston 26, an exhaust pipe 28 is connected to the bottom of one side of the box body 25, and a throttle valve 29 is installed on the exhaust pipe 28, a first one-way valve 23 is installed on the outlet pipe 21, and the cylinder 16 is fixed to the exhaust pipe 21. An intake pipe 22 is also connected to the intake pipe 22, and a second one-way valve 24 is installed on the intake pipe 22; when the first rotating shaft 1404 rotates, the elliptical block 1411 is used to push the push plate 19 and the first piston 17 to move, and the gas in the cylinder 16 is sent into the box body 25. Under the action of air pressure, the second piston 26 and the U-shaped rod 27 rise, so that the limiting mechanism 30 disengages from the ring gear 12, and then the ring gear 12 and the "8"-shaped blind plate 4 are used to rotate without interference, and an exhaust pipe 28 and a throttle valve 29 are provided. The exhaust speed of the throttle valve 29 is less than the intake speed, so that the gas in the box body 25 can be discharged slowly. After turning off the drive motor 1403, the limiting mechanism 30 can automatically reset to lock the ring gear 12.

[0036] The working principle of the present invention is as follows: the front flange 2 and the rear flange 3 are connected to the gas pipeline. At this time, the "8"-shaped blind plate 4 isolates the gas pipelines on both sides, and the blind plate valve is in a closed state. When the blind plate valve needs to be opened, the operator first loosens the bolts 5, the front flange 2 and the rear flange 3 are automatically separated, the "8"-shaped blind plate 4 is in an active state, the first fixed plate 8 and the second fixed plate 10 limit the "8"-shaped blind plate 4 to prevent the "8"-shaped blind plate 4 from offset and causing wear, and then start the drive motor 1403. The drive motor 1403 drives the first rotating shaft 1404, the disc 1405 and the elliptical block 1411 to rotate. At this time, the second rotating shaft 1407 does not rotate. When the elliptical block 1411 rotates, it pushes the push plate 19, the push rod 18 and the first piston 17 to move, and the gas in the cylinder 16 is sent into the box body 25 through the outlet pipe 21. Under the action of air pressure, the second piston 26 and the U-shaped rod 27 rise , so that the limiting mechanism 30 is separated from the gear ring 12, the disc 1405 and the active push block 1406 rotate, and the active push block 1406 squeezes the first spring 1410 when rotating. After the limiting mechanism 30 is separated from the gear ring 12, the active push block 1406 contacts the driven push block 1408, driving the second rotating shaft 1407 and the gear 15 to rotate, thereby rotating the gear ring 12 and the "8"-shaped blind plate 4. When the "8"-shaped blind plate 4 rotates 180°, the blind plate valve is fully opened. If it is necessary to reduce the gas flow, the "8"-shaped blind plate 4 continues to rotate, and the baffle 13 can block the gas pipeline, thereby reducing the gas flow. At this time, the blind plate end of the "8"-shaped blind plate 4 will overlap with the circular hole 11. By observing the overlapping area between the circular hole 11 and the blind plate end, the opening size of the pipeline can be determined, thereby controlling the gas flow. After the adjustment is completed, the staff can tighten the bolt 5, which reduces the workload of the operator;

[0037] When the first rotating shaft 1404 rotates, the elliptical block 1411 also rotates continuously. The first one-way valve 23 allows the gas in the cylinder 16 to enter the box body 25 only through the outlet pipe 21. The air inlet pipe 22 cooperates with the second one-way valve 24 to replenish gas in the cylinder 16 to achieve dynamic balance, and the excess gas will be discharged through the exhaust pipe 28. The throttle valve 29 is used to control the exhaust rate to avoid excessive exhaust. After the blind plate valve is opened, the driving motor 1403 is turned off. Under the action of the first spring 1410, the active push block 1406 will be pushed to disengage from the driven push block 1408 and gradually return to the initial state, and the elliptical block 1411 will no longer push the push plate 19. Under the influence of the second spring 20, the first piston 17 is gradually reset, the exhaust pipe 28 is continuously exhausted, the air pressure in the box body 25 is gradually reduced, the second piston 26 and the U-shaped rod 27 are gradually lowered, so that the limiting mechanism 30 automatically locks the gear ring 12, thereby ensuring the stability of the "8"-shaped blind plate 4 and avoiding gas leakage.

[0038] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An environmentally friendly blind plate valve for a gas pipeline, comprising a base (1), a front flange (2), a rear flange (3), and an "8"-shaped blind plate (4) located between the front flange (2) and the rear flange (3), wherein the "8"-shaped blind plate (4) comprises a blind plate end and a blind hole end, and is characterized in that: The base (1) is symmetrically provided with slide grooves, the bottom of the front flange (2) and the rear flange (3) are both fixed with slide rods (6), the bottom ends of the slide rods (6) are slidably connected to the slide grooves, the front flange (2) and the rear flange (3) are fixedly connected by bolts (5), and the "8"-shaped blind plate (4) is rotatably connected to one of the bolts (5); Two L-shaped rods (7) are fixed on the base (1), one end of the two L-shaped rods (7) is commonly mounted with a first fixing plate (8), two fixing blocks (9) are fixed on the side wall of the first fixing plate (8), one end of the two fixing blocks (9) is commonly fixed with a second fixing plate (10), a round hole (11) is opened on the second fixing plate (10), the round hole (11) has the same size as the blind hole of the "8"-shaped blind plate (4), a gear ring (12) is fixed on the "8"-shaped blind plate (4), baffles (13) are fixed on both sides of the blind hole end of the "8"-shaped blind plate (4), and a driving mechanism (14) is provided on one side of the first fixing plate (8) for driving the gear ring (12) to rotate; The driving mechanism (14) comprises a mounting plate (1401) fixed on two L-shaped rods (7), a motor seat (1402) being mounted on the mounting plate (1401), a driving motor (1403) being mounted on the motor seat (1402), an output shaft of the driving motor (1403) being connected to a first rotating shaft (1404), a second rotating shaft (1407) being rotatably mounted on the first fixing plate (8), a gear (15) being mounted on one end of the second rotating shaft (1407), the gear (15) being meshed with a gear ring (12), and a linkage mechanism being arranged between the other end of the second rotating shaft (1407) and the first rotating shaft (1404), so that the first rotating shaft (1404) can drive the second rotating shaft (1407) to rotate; The linkage mechanism comprises a disc (1405) fixed at one end of a first rotating shaft (1404); an active push block (1406) is fixed on a side wall of the disc (1405) away from the first rotating shaft (1404); a driven push block (1408) is fixed on the second rotating shaft (1407); a through hole is provided on the driven push block (1408); an arc rod (1409) is movably arranged in the through hole; one end of the arc rod (1409) is fixed on the active push block (1406); a first spring (1410) is sleeved on the arc rod (1409); and the first spring (1410) is located between the active push block (1406) and the driven push block (1408); A U-shaped rod (27) is movably provided on the first fixed plate (8), and a limiting mechanism (30) is fixed at one end of the U-shaped rod (27) for limiting the position of the gear ring (12); An elliptical block (1411) is fixed to the first rotating shaft (1404); a cylinder (16) having an opening at one end is fixed to the mounting plate (1401); a first piston (17) is arranged in the cylinder (16); a push rod (18) is fixed to one side wall of the first piston (17); a second spring (20) is connected to the other side wall; a push plate (19) is fixed to one end of the push rod (18); an end of the cylinder (16) away from the opening is fixed to an air outlet pipe (21); a box body (25) is fixed to the top of the air outlet pipe (21); one end of the U-shaped rod (27) extends into the box body (25) and is connected to the second piston (26); an exhaust pipe (28) is connected to the bottom of one side of the box body (25); and a throttle valve (29) is installed on the exhaust pipe (28); The air outlet pipe (21) is provided with a first one-way valve (23), the cylinder (16) is further connected with an air inlet pipe (22), and the air inlet pipe (22) is provided with a second one-way valve (24).

2. The environmentally friendly blind plate valve for gas pipeline according to claim 1, characterized in that: The limiting mechanism (30) comprises a limiting plate fixed to one end of the U-shaped rod (27), and a plurality of limiting teeth are fixed to the bottom of the limiting plate.

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