Dual-drive chain wheel type gas cut-off valve

Abstract

The utility model relates to the technical field of cut-off valves, in particular to a dual-drive chain wheel type gas cut-off valve which comprises a bottom frame, a left valve body, a right valve body, a valve plate, a plate turning device and a clamping device, and the valve plate is arranged between the left valve body and the right valve body in a rotating mode. The right valve body comprises a fixed valve body and a floating valve body, the fixed valve body is connected with the left valve body through a pull rod, the floating valve body is connected with the left valve body through a clamping device, the lower end of the floating valve body is provided with a roller and is in rolling fit with the underframe through the roller, and a corrugated pipe for length compensation is arranged between the floating valve body and the fixed valve body; the clamping device comprises a turning plate chain wheel, a left transmission chain wheel, a right transmission chain wheel, a lead screw and a chain, guide wheels are rotationally arranged on the left side and the right side of the lower end of the left valve body, and a guide plate is arranged at the lower end of the valve plate and inserted into wheel grooves of the guide wheels. By arranging the guide wheel, when the valve plate is overturned, the guide plate at the lower part of the valve plate is inserted into the guide wheel, so that the valve plate is ensured to be overturned stably and a sealing ring is prevented from being scratched.

Description

Technical Field

[0001] The utility model relates to the technical field of cut-off valves, and more specifically to a double-driven sprocket type gas cut-off valve. Background Art

[0002] Blind plate valves are widely used in gas and toxic gas pipelines in industrial and mining enterprises, steel mills, environmental protection and other industries as reliable cutting devices. When the valve is in the closed state, it can absolutely cut off the medium in the pipeline, achieve absolute sealing, and can realize remote operation.

[0003] The existing blind plate valve has a free-turning valve plate, which is prone to deviation and scratching of the sealing ring during the turning process; and the existing valve plate chain is tensioned by a tensioning wheel, which needs to be equipped with a support frame, a tensioning wheel, a tensioning wheel and other components, which takes up a large space and is inconvenient to operate.

[0004] Therefore, it is necessary to improve the prior art. Utility Model Content

[0005] In order to overcome the deficiencies in the prior art, a double-drive sprocket type gas shut-off valve is provided which is convenient for chain tensioning and has high valve plate flipping accuracy.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A dual-drive sprocket type gas shut-off valve, comprising a base frame, a left valve body, a right valve body, a valve plate, a flap device and a clamping device, wherein the valve plate is rotatably arranged between the left valve body and the right valve body; the right valve body comprises a fixed valve body and a floating valve body, the fixed valve body is connected to the left valve body through a pull rod, the floating valve body is connected to the left valve body through a clamping device, a roller is arranged at the lower end of the floating valve body and rollingly cooperates with the base frame through the roller, and a bellows for length compensation is arranged between the floating valve body and the fixed valve body;

[0008] The clamping device comprises a flap sprocket, a left transmission sprocket, a right transmission sprocket, a lead screw and a chain. The flap sprocket, the left transmission sprocket and the right transmission sprocket are connected by a chain. The flap sprocket, the left transmission sprocket and the right transmission sprocket are respectively connected with lead screws. Nuts respectively threadedly matched with the three lead screws are fixedly arranged on the floating valve body. The left transmission sprocket or the right transmission sprocket is transmission-connected with a clamping motor. The two ends of the chain are disconnected and respectively connected with the two ends of the chain tensioner.

[0009] Guide wheels are rotatably arranged on the left and right sides of the lower end of the left valve body, and a guide plate is arranged at the lower end of the valve plate, and the guide plate is inserted in the wheel groove of the guide wheel.

[0010] Preferably, the flap device includes a flap motor and a sprocket, the flap motor is fixedly arranged on the left valve body, a flap chain is fixedly connected to one side of the guide plate, and the sprocket is arranged on the motor shaft of the flap motor and meshes with the flap chain.

[0011] Preferably, the chain tensioner comprises a tension sleeve I and a tension sleeve II which are slidably sleeved, and the ends of the tension sleeve I and the tension sleeve II which are away from each other are respectively hinged to the two ends of the chain, and the tension sleeve II is provided with at least three positioning holes along the length direction, and the tension sleeve I is provided with at least two waist-shaped holes along the length direction, and a positioning pin is provided in at least one of the positioning holes and the positioning pin passes through the waist-shaped hole;

[0012] The spacing between adjacent girdle holes is a non-integer multiple of the spacing between adjacent positioning holes.

[0013] Preferably, one end of the locating pin is a tapered section, an end of the locating pin away from the tapered section is provided with a stopper, and a side of the locating pin close to the tapered section is provided with an external thread and is threadedly connected with a nut.

[0014] Preferably, sealing rings are embedded on the outer sides of the blind holes and through holes of the valve plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model provides a guide wheel. When the valve plate is turned over, the guide plate at the bottom of the valve plate is inserted into the guide wheel. The gap between the guide wheel and the guide plate is 1 to 2 mm, which ensures that the valve plate is turned over smoothly and prevents the sealing ring from being scratched.

[0017] 2. The utility model replaces the original tensioning mechanism with a chain tensioner, removes parts such as a tensioning wheel, a tensioning wheel, and a supporting frame, reduces labor intensity, improves work efficiency, and reduces production costs.

[0018] 3. The right valve body of the utility model is equipped with a bellows, which can be freely extended and retracted, with a retracted length of 20 to 50 mm, and has an automatic compensation function for the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific implementation of the utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0021] Figure 2 This is a side view of the structure of the utility model;

[0022] Figure 3 This is a schematic diagram of chain tensioner installation;

[0023] Figure 4It is a schematic diagram of the chain tensioner structure;

[0024] Figure 5 This is a schematic diagram of the flap chain installation;

[0025] Figure 6 This is a schematic diagram of the bellows installation;

[0026] Figure 7 Schematic diagram of the positioning pin structure.

[0027] In the figure: 1-base, 2-left valve body, 2.1-guide wheel, 3-right valve body, 3.1-fixed valve body, 3.2-floating valve body, 3.3-roller, 4-valve plate, 4.1-guide plate, 4.2-sealing ring, 5-flip device, 5.1-flip motor, 5.2-sprocket, 5.3-flip chain, 6-clamping device, 6.1-flip sprocket, 6.2-left drive sprocket, 6.3-right drive sprocket, 6.4-screw, 6.5-chain, 6.6-clamping motor, 7-bellows, 8-chain tensioner, 8.1-tensioning sleeve I, 8.2-tensioning sleeve II, 8.3-positioning hole, 8.4-waist round hole, 8.5-positioning pin, 8.6-nut. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example:

[0030] like Figures 1 to 7As shown, a dual-drive sprocket type gas shut-off valve comprises a base frame 1, a left valve body 2, a right valve body 3, a valve plate 4, a flap device 5 and a clamping device 6, and two motors are used to realize flapping and clamping operations respectively. The valve plate 4 is rotatably arranged between the left valve body 2 and the right valve body 3, and the right valve body 3 comprises a fixed valve body 3.1 and a floating valve body 3.2. The fixed valve body 3.1 is connected to the left valve body 2 through a pull rod, and the floating valve body 3.2 is connected to the left valve body 2 through a clamping device 6. The distance between the floating valve body 3.2 and the left valve body 2 is controlled by the clamping device 6, so as to clamp or loosen the valve plate 4. The blind holes and through holes of the valve plate 4 are both inlaid with sealing rings 4.2, and the sealing rings are inlaid on the valve plate. The sealing maintenance does not require shutdown, and the replacement of the sealing rings can be operated online, which is convenient and safe. The lower end of the floating valve body 3.2 is provided with a roller 3.3 and rollingly cooperates with the bottom frame 1 through the roller 3.3, so as to facilitate the floating valve body 3.2 to move relative to the left valve body 2. A bellows 7 for length compensation is provided between the floating valve body 3.2 and the fixed valve body 3.1.

[0031] The clamping device 6 includes a flap sprocket 6.1, a left transmission sprocket 6.2, a right transmission sprocket 6.3, a lead screw 6.4 and a chain 6.5. The flap sprocket 6.1, the left transmission sprocket 6.2 and the right transmission sprocket 6.3 are connected by a chain 6.5. The flap sprocket 6.1, the left transmission sprocket 6.2 and the right transmission sprocket 6.3 are respectively connected with a lead screw 6.4, which is rotatably arranged on the left valve body. Nuts that are respectively threadedly matched with the three lead screws 6.4 are fixedly arranged on the floating valve body 3.2. The left transmission sprocket 6.2 or the right transmission sprocket 6.3 is transmission-connected with a clamping motor 6.6. The left transmission sprocket 6.2 or the right transmission sprocket 6.3 is driven to rotate by the clamping motor 6.6, and then the other two sprockets and the lead screw 6.4 are driven to rotate by the chain 6.5. The floating valve body 3.2 is driven to move relative to the left valve body 2 by the cooperation of the lead screw 6.4 and the nut 6.5.

[0032] The two ends of the chain 6.5 are disconnected and respectively connected to the two ends of the chain tensioner 8. The chain tensioner 8 comprises a tensioning sleeve I 8.1 and a tensioning sleeve II 8.2 which are slidably sleeved. The ends of the tensioning sleeve I 8.1 and the tensioning sleeve II 8.2 which are away from each other are respectively hinged to the two ends of the chain 6.5. The tensioning sleeve II 8.2 is provided with at least three positioning holes 8.3 along the length direction, and the tensioning sleeve I 8.1 is provided with at least two waist-shaped holes 8.4 along the length direction.

[0033] like Figure 4As shown, in this embodiment, the number of positioning holes 8.3 is set to 9, and the number of oval holes 8.4 is set to 4. Initially, the positioning pin 8.5 connects the rightmost positioning hole 8.3 and the oval hole 8.4. When the chain 6.5 is loose, the second positioning pin 8.5 is inserted into one of the oval holes 8.4 on the left, and the tensioning sleeve II 8.2 is pushed toward the tensioning sleeve I 8.1, and the second positioning pin 8.5 is inserted into the positioning hole 8.3 that overlaps with the right side of the oval hole 8.4, so as to realize the tensioning of the chain 6.5. By setting the oval holes, the first positioning pin 8.5 does not need to be removed during the chain tensioning process, which can prevent the tensioning sleeve I 8.1 from separating from the tensioning sleeve II 8.2, thereby improving the safety of operation.

[0034] The spacing between adjacent oval holes 8.4 is a non-integer multiple of the spacing between adjacent positioning holes 8.3, ensuring the tensioning effect. One end of the positioning pin 8.5 is a tapered section, which is convenient for insertion into the positioning hole 8.3. A stopper is provided at the end of the positioning pin 8.5 away from the tapered section. The side of the positioning pin 8.5 close to the tapered section is provided with an external thread and is threadedly connected with a nut 8.6, which limits the positioning pin 8.5.

[0035] The flap device 5 includes a flap motor 5.1 and a sprocket 5.2. The flap motor 5.1 is fixedly arranged on the left valve body 2. The left valve body 2 has guide wheels 2.1 rotatably arranged on both sides of the lower end. A guide plate 4.1 is arranged at the lower end of the valve plate 4. The guide plate 4.1 is inserted into the wheel groove of the guide wheel 2.1, and the valve plate 4 is guided by the guide wheel 2.1. A flap chain 5.3 is fixedly connected to one side of the guide plate 4.1. The sprocket 5.2 is arranged on the motor shaft of the flap motor 5.1 and meshed with the flap chain 5.3. The flap motor 5.1 drives the sprocket 5.2 to rotate, and then the engagement of the sprocket 5.2 and the flap chain 5.3 drives the valve plate 4 to rotate. Since the flap chain 5.3 is far away from the rotating shaft of the valve plate 4, the flap motor 5.1 can drive the valve plate 4 with a small torque.

[0036] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. A dual-drive sprocket type gas shut-off valve, comprising a base frame (1), a left valve body (2), a right valve body (3), a valve plate (4), a flap device (5) and a clamping device (6), wherein the valve plate (4) is rotatably arranged between the left valve body (2) and the right valve body (3); characterized in that: The right valve body (3) comprises a fixed valve body (3.1) and a floating valve body (3.2); the fixed valve body (3.1) is connected to the left valve body (2) via a pull rod; the floating valve body (3.2) is connected to the left valve body (2) via a clamping device (6); a roller (3.3) is provided at the lower end of the floating valve body (3.2) and the roller (3.3) is used for rolling engagement with the base frame (1); a bellows (7) for length compensation is provided between the floating valve body (3.2) and the fixed valve body (3.1); The clamping device (6) comprises a flap sprocket (6.1), a left drive sprocket (6.2), a right drive sprocket (6.3), a lead screw (6.4) and a chain (6.5); the flap sprocket (6.1), the left drive sprocket (6.2) and the right drive sprocket (6.3) are connected via the chain (6.5); the flap sprocket (6.1), the left drive sprocket (6.2) and the right drive sprocket (6.3) are respectively connected to the lead screw (6.4); nuts respectively threadedly matched with the three lead screws (6.4) are fixedly arranged on the floating valve body (3.2); the left drive sprocket (6.2) or the right drive sprocket (6.3) is drive-connected to a clamping motor (6.6); the two ends of the chain (6.5) are disconnected and respectively connected to the two ends of a chain tensioner (8); Guide wheels (2.1) are rotatably arranged on the left and right sides of the lower end of the left valve body (2), and a guide plate (4.1) is arranged at the lower end of the valve plate (4), and the guide plate (4.1) is inserted into the wheel groove of the guide wheel (2.1).

2. A dual-drive sprocket type gas shut-off valve according to claim 1, characterized in that: The flap device (5) comprises a flap motor (5.1) and a sprocket (5.2); the flap motor (5.1) is fixedly arranged on the left valve body (2); a flap chain (5.3) is fixedly connected to one side of the guide plate (4.1); and the sprocket (5.2) is arranged on the motor shaft of the flap motor (5.1) and meshes with the flap chain (5.3).

3. A dual-drive sprocket type gas shut-off valve according to claim 1, characterized in that: The chain tensioner (8) comprises a tensioning sleeve I (8.1) and a tensioning sleeve II (8.2) which are slidably sleeved, wherein the ends of the tensioning sleeve I (8.1) and the tensioning sleeve II (8.2) which are away from each other are respectively hinged to the two ends of the chain (6.5), the tensioning sleeve II (8.2) is provided with at least three positioning holes (8.3) along the length direction, the tensioning sleeve I (8.1) is provided with at least two waist-shaped holes (8.4) along the length direction, and a positioning pin (8.5) is provided in at least one of the positioning holes (8.3), and the positioning pin passes through the waist-shaped hole (8.4); The spacing between adjacent waisted round holes (8.4) is a non-integer multiple of the spacing between adjacent positioning holes (8.3).

4. A dual-drive sprocket type gas shut-off valve according to claim 3, characterized in that: One end of the positioning pin (8.5) is a tapered section, an end of the positioning pin (8.5) away from the tapered section is provided with a stopper, and a side of the positioning pin (8.5) close to the tapered section is provided with an external thread and is threadedly connected to a nut (8.6).

5. The dual-drive sprocket type gas shut-off valve according to claim 1, characterized in that: Sealing rings (4.2) are embedded on the outer sides of the blind holes and through holes of the valve plate (4).

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