Butterfly valve with quick shut-off mechanism

Abstract

The utility model relates to butterfly valve technical field discloses a butterfly valve with quick cut -off mechanism, including valve body, the inside of valve body is provided with valve plate, one end of valve plate is fixedly connected with valve rod, the top of valve body is fixedly connected with installation box, the top of installation box is fixedly connected with drive box. The utility model discloses through opening the valve, the high pressure gas in high pressure gas cylinder inside enters the inside of cylinder through the connecting pipe, and the piston rod is slid to left side through high pressure gas and drives the rack to move, and the rack is engaged transmission with the gear on valve rod in the moving process, drives the rotation of valve rod, drives the rotation of valve plate and makes the valve body close, realizes quick cut -off, simultaneously, the high pressure gas in cylinder continuously acts on piston rod, can form stable axial thrust, effectively avoids the rotary of valve rod because of fluid pressure impact, ensures that the valve body keeps reliable closed state, can effectively respond to the sudden situation such as motor failure, power failure etc.

Description

Technical Field

[0001] This utility model relates to the technical field, and in particular to a butterfly valve with a rapid shut-off mechanism. Background Technology

[0002] Butterfly valves are a common type of shut-off and regulating valve. Their core opening and closing element is a disc-shaped butterfly plate. The butterfly plate is driven to rotate around its axis by the valve stem to control the flow of fluid. They are suitable for various fluid media such as water, steam, gas, and oil, and are widely used in industrial and civil fields such as water supply and drainage, chemical industry, metallurgy, power, and HVAC.

[0003] Electric butterfly valves are widely used in various fluid transport scenarios due to their advantages in automated control. However, electric butterfly valves usually rely on motor drive, and in actual use, they often face unexpected situations such as motor failure and sudden power outages, which result in the valve stem not having the power to drive the valve plate to close, making it difficult to cut off the fluid transport channel and affecting the reliability of use. Therefore, we propose a butterfly valve with a quick shut-off mechanism. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a butterfly valve with a quick-cut-off mechanism.

[0005] This utility model is achieved by the following technical solution: a butterfly valve with a quick shut-off mechanism, including a valve body, a valve plate is provided inside the valve body, a valve stem is fixedly connected to one end of the valve plate, a mounting box is fixedly connected to the top of the valve body, a drive box is fixedly connected to the top of the mounting box, a shut-off assembly is provided at the right end of the mounting box, the upper end of the valve stem extends into the interior of the mounting box and is fixedly connected to a gear, and a drive assembly is provided inside the drive box; The cutting assembly includes a fixing sleeve, inside which a high-pressure gas cylinder is housed. A connecting pipe is connected to the top of the high-pressure gas cylinder, and a valve is fixedly installed on the inner wall of the connecting pipe. The end of the connecting pipe away from the high-pressure gas cylinder is connected to a cylinder body. A piston rod is slidably connected inside the cylinder body. The left end of the piston rod passes through the cylinder body and is fixedly connected to a rack. A guide block is fixedly connected to the front end of the rack. A guide rod is slidably connected to the inner wall of the guide block. A positioning rod is inserted into the inner wall of the mounting box, and an exhaust valve is fixedly installed on the inner wall of the cylinder body.

[0006] The above technical solution stores high-pressure gas in a high-pressure gas cylinder. When valve closure needs to be cut off, the high-pressure gas inside the cylinder enters the cylinder through the connecting pipe by opening the valve. The high-pressure gas pushes the piston rod to slide to the left, which in turn moves the rack. During the movement of the rack, it meshes with the gear on the valve rod, causing the valve rod to rotate and the valve plate to rotate, thus closing the valve body and achieving rapid shut-off. At the same time, the high-pressure gas inside the cylinder continuously acts on the piston rod, which can form a stable axial thrust, effectively preventing the valve rod from rotating due to fluid pressure impact, ensuring that the valve body remains in a reliable closed state, and effectively dealing with emergencies such as motor failure and power outage.

[0007] As a further improvement to the above solution, the left end of the fixing sleeve is fixedly connected to the right end of the mounting box, and the left end of the cylinder body is fixedly connected to the right end of the mounting box.

[0008] The above technical solution uses a fixing sleeve to position the high-pressure gas cylinder, which facilitates the quick removal of the high-pressure gas cylinder for refilling or replacement.

[0009] As a further improvement to the above solution, the rack is located inside the mounting box, one end of the guide rod is fixedly connected to the inner wall of the mounting box, and the rear end of the positioning rod passes through the mounting box and is inserted into the inner wall of the guide block.

[0010] With the above technical solution, the rack is located inside the mounting box to avoid the influence of the external environment on the rack. The guide rod limits the guide block. Since the guide block is fixedly connected to the rack, it effectively prevents the rack from shifting during movement. When the positioning rod is inserted into the guide block, it positions the rack so that it cannot move.

[0011] As a further improvement to the above solution, the drive assembly includes a mounting bracket, a threaded rod rotatably connected to the top of the mounting bracket, a fixed rod fixedly connected to the top of the mounting bracket, a rotating column rotatably connected to the top of the mounting bracket, a worm gear fixedly connected to the surface of the rotating column, an insert rod fixedly connected to the bottom of the rotating column, a connecting sleeve inserted into the bottom of the insert rod, a worm gear rotatably connected to the inner wall of the mounting bracket, and a motor fixedly connected to one end of the mounting bracket.

[0012] The above technical solution uses a motor to drive a worm gear to rotate, which in turn drives a worm wheel and a rotating column to rotate. This causes the insert at the bottom of the rotating column to drive the valve stem to rotate through a connecting sleeve, which in turn drives the valve plate to rotate, thus achieving closure or flow regulation.

[0013] As a further improvement to the above solution, the mounting bracket is located inside the drive box, the surface of the threaded rod is threadedly connected to the inner wall of the drive box, and the surface of the fixing rod is slidably connected to the inner wall of the drive box.

[0014] With the above technical solution, since the threaded rod is threadedly connected to the drive box, it will move up and down along the inner wall of the drive box during rotation, thereby driving the mounting bracket to move up and down. The mounting bracket is limited by the fixing rod to avoid deviation during movement, which facilitates the subsequent docking of the insertion rod and the connecting sleeve.

[0015] As a further improvement to the above solution, the worm gear and the worm mesh with each other, the bottom of the connecting sleeve is fixedly connected to the top of the valve stem, and the surface of the valve stem is rotatably connected to the inner wall of the valve body.

[0016] With the above technical solution, since the connecting sleeve is fixed to the top of the valve stem and the connecting sleeve is connected to the insert rod, when the insert rod rotates, it will drive the connecting sleeve to rotate, causing the valve stem to rotate. Through the self-locking characteristics of the worm gear, the valve stem is effectively restricted from rotating unexpectedly.

[0017] As a further improvement to the above solution, the output end of the motor is fixedly connected to one end of the worm gear.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features a cutting-off assembly. Specifically, by opening the valve, high-pressure gas from the high-pressure cylinder enters the cylinder through a connecting pipe. This high-pressure gas pushes the piston rod to slide to the left, causing the rack to move. During this movement, the rack engages with the gear on the valve rod, rotating the valve rod and causing the valve plate to rotate, thus closing the valve body and achieving rapid cutting-off. Simultaneously, the high-pressure gas inside the cylinder continuously acts on the piston rod, creating a stable axial thrust. This effectively prevents the valve rod from rotating due to fluid pressure impact, ensuring the valve body remains reliably closed and effectively responding to emergencies such as motor failure and power outages.

[0019] This invention features a drive assembly that rotates a threaded rod to move the mounting bracket upwards, which in turn moves the rotating column upwards, causing the insert rod to disengage from the connecting sleeve. This allows for quick disconnection from the valve stem, facilitating subsequent shut-off operations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This utility model Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 This is a schematic diagram of the valve stem connection structure of this utility model; Figure 5 This is a schematic diagram of the cutting assembly structure of this utility model; Figure 6 This is a schematic diagram of the drive component structure of this utility model; Figure 7 This is a cross-sectional view of the mounting box and drive box of this utility model.

[0021] Explanation of key symbols: 1. Valve body; 2. Valve plate; 3. Valve stem; 4. Mounting box; 5. Drive box; 6. Cut-off assembly; 601. Fixing sleeve; 602. High-pressure gas cylinder; 603. Connecting pipe; 604. Valve; 605. Cylinder body; 606. Piston rod; 607. Rack; 608. Guide block; 609. Guide rod; 610. Positioning rod; 611. Exhaust valve; 7. Gear; 8. Drive assembly; 801. Mounting bracket; 802. Threaded rod; 803. Fixing rod; 804. Rotating column; 805. Worm gear; 806. Insert rod; 807. Connecting sleeve; 808. Worm; 809. Motor. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Example

[0023] Please combine Figure 1-7 A butterfly valve with a quick-cut-off mechanism according to this embodiment includes a valve body 1, a valve plate 2 is provided inside the valve body 1, a valve stem 3 is fixedly connected to one end of the valve plate 2, a mounting box 4 is fixedly connected to the top of the valve body 1, a drive box 5 is fixedly connected to the top of the mounting box 4, a cut-off component 6 is provided at the right end of the mounting box 4, the upper end of the valve stem 3 extends into the interior of the mounting box 4 and is fixedly connected to a gear 7, and a drive component 8 is provided inside the drive box 5. The cutting assembly 6 includes a fixed sleeve 601, inside which a high-pressure gas cylinder 602 is housed. A connecting pipe 603 is connected to the top of the high-pressure gas cylinder 602. A valve 604 is fixedly installed on the inner wall of the connecting pipe 603. The end of the connecting pipe 603 away from the high-pressure gas cylinder 602 is connected to a cylinder 605. A piston rod 606 is slidably connected inside the cylinder 605. The left end of the piston rod 606 passes through the cylinder 605 and is fixedly connected to a rack 607. A guide block 608 is fixedly connected to the front end of the rack 607. A guide rod 609 is slidably connected to the inner wall of the guide block 608. A positioning rod 610 is inserted into the inner wall of the mounting box 4. An exhaust valve 611 is fixedly installed on the inner wall of the cylinder 605. The guide rod 609 is inserted into the inner wall of the mounting box 4. The positioning rod 610 is removed, releasing the limit on the guide block 608 and opening the valve 604. The high-pressure gas inside the high-pressure gas cylinder 602 enters the cylinder 605 through the connecting pipe 603. The high-pressure gas pushes the piston rod 606 to slide to the left, driving the rack 607 to move. During the movement of the rack 607, it meshes with the gear 7 on the valve rod 3, driving the valve rod 3 to rotate, which in turn drives the valve plate 2 to rotate, closing the valve body 1 and achieving rapid shut-off. At the same time, the high-pressure gas inside the cylinder 605 continuously acts on the piston rod 606, forming a stable axial thrust, effectively preventing the valve rod 3 from rotating due to fluid pressure impact, ensuring that the valve body 1 remains reliably closed, and effectively responding to emergencies such as motor 809 failure and power outage.

[0024] The left end of the fixing sleeve 601 is fixedly connected to the right end of the mounting box 4, and the left end of the cylinder 605 is fixedly connected to the right end of the mounting box 4. The high-pressure gas cylinder 602 is placed through the fixing sleeve 601, which makes it convenient to remove and replace the high-pressure gas cylinder 602 later.

[0025] The rack 607 is located inside the mounting box 4. One end of the guide rod 609 is fixedly connected to the inner wall of the mounting box 4. The rear end of the positioning rod 610 passes through the mounting box 4 and is inserted into the inner wall of the guide block 608. When the positioning rod 610 is inserted into the mounting box 4 and the guide block 608, it limits the position of the guide block 608 and prevents the rack 607 from sliding accidentally.

[0026] The drive assembly 8 includes a mounting bracket 801. A threaded rod 802 is rotatably connected to the top of the mounting bracket 801. A fixing rod 803 is fixedly connected to the top of the mounting bracket 801. A rotating column 804 is rotatably connected to the top of the mounting bracket 801. A worm gear 805 is fixedly connected to the surface of the rotating column 804. An insert rod 806 is fixedly connected to the bottom of the rotating column 804. A connecting sleeve 807 is inserted into the bottom of the insert rod 806. A worm gear 808 is rotatably connected to the inner wall of the mounting bracket 801. A motor 809 is fixedly connected to one end of the mounting bracket 801. The motor 809 drives the worm gear 808 to rotate. The worm gear 808 drives the worm gear 805 and the rotating column 804 to rotate. This causes the insert rod 806 at the bottom of the rotating column 804 to drive the valve stem 3 to rotate through the connecting sleeve 807, thereby driving the valve plate 2 to rotate, achieving closure or flow regulation.

[0027] The mounting bracket 801 is located inside the drive box 5. The surface of the threaded rod 802 is threadedly connected to the inner wall of the drive box 5, and the surface of the fixed rod 803 is slidably connected to the inner wall of the drive box 5. When a sudden situation occurs such as motor 809 failure or power failure, and valve body 1 needs to be closed urgently, the mounting bracket 801 is moved upward by rotating the threaded rod 802, which in turn moves the rotating column 804 upward, causing the insertion rod 806 to disengage from the connecting sleeve 807, canceling the power transmission and locking of the valve stem 3. At this time, the valve stem 3 can rotate.

[0028] The worm gear 805 meshes with the worm 808, the bottom of the connecting sleeve 807 is fixedly connected to the top of the valve stem 3, and the surface of the valve stem 3 is rotatably connected to the inner wall of the valve body 1.

[0029] The output end of the motor 809 is fixedly connected to one end of the worm gear 808.

[0030] The implementation principle of a butterfly valve with a quick-cut-off mechanism in this embodiment is as follows: Under normal use, the motor 809 drives the worm gear 808 to rotate, which in turn drives the worm wheel 805 and the rotating column 804 to rotate. This causes the insert rod 806 at the bottom of the rotating column 804 to drive the valve stem 3 to rotate through the connecting sleeve 807, thereby driving the valve plate 2 to rotate, achieving closure or flow regulation. When a sudden situation occurs such as motor 809 failure or power failure, and it is necessary to urgently close the valve body 1, the valve is closed by rotating the threaded rod 802. The mounting bracket 801 moves upward, causing the rotating column 804 to move upward, disengaging the insertion rod 806 from the connecting sleeve 807. Then, the positioning rod 610 inserted inside the guide block 608 is removed, releasing the limit on the guide block 608. The valve 604 is then opened, allowing high-pressure gas from the high-pressure cylinder 602 to enter the cylinder 605 through the connecting pipe 603. This high-pressure gas pushes the piston rod 606 to slide to the left, causing the rack 607 to move. During this movement, the rack 607 meshes with the gear 7 on the valve stem 3. The piston rod 3 rotates, causing the valve plate 2 to rotate and close the valve body 1, achieving rapid shut-off. Simultaneously, the high-pressure gas inside the cylinder 605 continuously acts on the piston rod 606, forming a stable axial thrust. This effectively prevents the valve rod 3 from rotating due to fluid pressure impact, ensuring the valve body 1 remains reliably closed. This effectively addresses emergencies such as motor 809 malfunction or power outages. After motor 809 maintenance is completed or power is restored, valve 604 is closed, and exhaust valve 611 is opened to release the high-pressure gas inside the cylinder 605. Open the door on one side of the mounting box 4, push the rack 607 to the right, causing the piston rod 606 to slide back into the cylinder 605. Then, insert the positioning rod 610 into the mounting box 4 and the guide block 608 to limit the position of the guide block 608 and prevent the rack 607 from sliding accidentally. Then, rotate the threaded rod 802 to push the mounting bracket 801 downward, causing the rotating column 804 and the insert rod 806 to move downward, so that the insert rod 806 engages with the connecting sleeve 807, restoring power transmission, and the valve can return to normal operation.

[0031] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A butterfly valve with a quick-shut-off mechanism, characterized in that, The valve includes a valve body (1), a valve plate (2) is provided inside the valve body (1), a valve stem (3) is fixedly connected to one end of the valve plate (2), a mounting box (4) is fixedly connected to the top of the valve body (1), a drive box (5) is fixedly connected to the top of the mounting box (4), a cut-off assembly (6) is provided at the right end of the mounting box (4), the upper end of the valve stem (3) extends into the interior of the mounting box (4) and is fixedly connected to a gear (7), and a drive assembly (8) is provided inside the drive box (5). The cutting assembly (6) includes a fixed sleeve (601), inside which a high-pressure gas cylinder (602) is disposed. The top of the high-pressure gas cylinder (602) is connected to a connecting pipe (603). A valve (604) is fixedly installed on the inner wall of the connecting pipe (603). The end of the connecting pipe (603) away from the high-pressure gas cylinder (602) is connected to a cylinder body (605). A piston rod (606) is slidably connected inside the cylinder body (605). The left end of the piston rod (606) passes through the cylinder body (605) and is fixedly connected to a rack (607). A guide block (608) is fixedly connected to the front end of the rack (607). A guide rod (609) is slidably connected to the inner wall of the guide block (608). A positioning rod (610) is inserted into the inner wall of the mounting box (4). An exhaust valve (611) is fixedly installed on the inner wall of the cylinder body (605).

2. The butterfly valve with a quick-shutdown mechanism as described in claim 1, characterized in that: The left end of the fixing sleeve (601) is fixedly connected to the right end of the mounting box (4), and the left end of the cylinder (605) is fixedly connected to the right end of the mounting box (4).

3. A butterfly valve with a quick-shutdown mechanism as described in claim 1, characterized in that: The rack (607) is located inside the mounting box (4), one end of the guide rod (609) is fixedly connected to the inner wall of the mounting box (4), and the rear end of the positioning rod (610) passes through the mounting box (4) and is inserted into the inner wall of the guide block (608).

4. A butterfly valve with a quick-shutdown mechanism as described in claim 1, characterized in that: The drive assembly (8) includes a mounting bracket (801), a threaded rod (802) is rotatably connected to the top of the mounting bracket (801), a fixed rod (803) is fixedly connected to the top of the mounting bracket (801), a rotating column (804) is rotatably connected to the top of the mounting bracket (801), a worm gear (805) is fixedly connected to the surface of the rotating column (804), an insert rod (806) is fixedly connected to the bottom of the rotating column (804), a connecting sleeve (807) is inserted into the bottom of the insert rod (806), a worm gear (808) is rotatably connected to the inner wall of the mounting bracket (801), and a motor (809) is fixedly connected to one end of the mounting bracket (801).

5. A butterfly valve with a quick-shutdown mechanism as described in claim 4, characterized in that: The mounting bracket (801) is located inside the drive box (5), the surface of the threaded rod (802) is threadedly connected to the inner wall of the drive box (5), and the surface of the fixed rod (803) is slidably connected to the inner wall of the drive box (5).

6. A butterfly valve with a quick-shutdown mechanism as described in claim 4, characterized in that: The worm gear (805) meshes with the worm (808), the bottom of the connecting sleeve (807) is fixedly connected to the top of the valve stem (3), and the surface of the valve stem (3) is rotatably connected to the inner wall of the valve body (1).

7. A butterfly valve with a quick-shutdown mechanism as described in claim 4, characterized in that: The output end of the motor (809) is fixedly connected to one end of the worm (808).

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