Closed type vertical blind plate gate valve equipment
By designing a closed vertical blind plate gate valve equipment, the three-passage alternating staggered design and the matching structure of the blind plate ring and the valve seat are adopted, the faults and safety hazards of existing plug-in valves when cutting off dust-containing gas are solved, and efficient and safe gas partition is achieved.
Patent Information
- Application Number
- CN202311777858.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2025-06-24
AI Technical Summary
The existing plug-in valves have different degrees of faults and safety hazards when used to cut off dust-containing gas during blast furnace iron smelting, and cannot effectively separate the gas, affecting the maintenance and production process of the dust removal cylinder.
A closed vertical blind plate gate valve equipment is designed, adopting three-line seal alternating staggered design, the matching structure of the blind plate ring and the valve seat, combined with flexible isolation pipe and push and pull components, to achieve effective closing and opening of the blind plate.
The equipment can reliably cut off dust-containing gas, improve operational safety and equipment reliability, avoid the risk of gas poisoning and environmental pollution, and meet the operational needs of the production process.
Smart Images
Figure CN120194162A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a closed vertical blind gate valve device, belonging to the technical field of gate valves. Background Art
[0002] During the blast furnace ironmaking process, the dust content in the gas is relatively high (≥30 mg / m³), and it must be treated by a dust removal process to meet the usage requirements of subsequent process equipment. The inlet pipe of the existing dust removal cylinder uses a butterfly valve + plug valve cut-off method. There are currently 3 structural types of plug valves that are in use and have been used: a. Open-type spectacle valve (blind gate valve), b. Closed-type plug valve, c. Hydraulic air-lock type plug valve device; however, in the process of use, different degrees of defects and failure problems have been found, resulting in the ineffective isolation of the dusty gas, affecting the withdrawal of the dust removal cylinder and not meeting the operating requirements of the production process. The reliability of this plug valve is the core safety guarantee for the cut-out maintenance of the dust removal cylinder. When the plug valve cannot effectively cut off the gas, there will inevitably be a greater risk of gas poisoning during the maintenance of other auxiliary equipment of the cylinder, posing a greater safety hazard.
[0003] The open-type spectacle valve (blind gate valve) is subdivided into two structures: the flip-type. Although this valve has a simple structure, there is a large amount of gas leakage during the opening and closing operations in the dusty gas pipeline, posing a greater safety hazard and environmental pollution problem to on-site operators and the surrounding environment, and it is not suitable for installation and use; the translation-type. The walking plate and clamping mechanism of this device are prone to jamming, resulting in the inability to close and the inability to clamp after closing, leading to the leakage of dusty gas and the above-mentioned common defects of the open type.
[0004] The closed-type plug valve is large in volume and heavy in structure. Its internal walking plate device is prone to jamming, and the bottom support of the walking plate is prone to wear, resulting in the disengagement of the upper gear and rack and the inability to walk normally. During the walking process of the walking plate, the meshing part of the upper gear and rack is prone to tooth jamming and tooth skipping, resulting in the phenomenon that the walking plate cannot be switched in place. The blind plate ring and blind plate on the walking plate device are prone to falling off from the frame, leading to equipment failure; currently, there are three types of clamping mechanisms for this plug valve: gear and ring drive type, connecting rod drive type, and chain drive type. Since the clamping actuator is connected to the internal clamping plate using a screw rod style, the entire clamping transmission pair is too many, resulting in too much resistance during use. At the same time, due to reasons such as dust accumulation in the internal bellows, the loosening and clamping actions are prone to jamming, and it is easy to cause problems such as the shear of the key of the transmission gear, the breakage of the gear shaft, the shear failure of the connecting rod pin, the breakage of the chain, and the damage of the bearing, making the valve unable to operate; During the use of the hydraulic lock air slide valve, since the internal gate plate is exposed to the dusty gas in its open state, serious dust accumulation occurs inside it. The valve plate and its seal are easily washed and worn by the dusty gas. When the valve is closed, it relies on the hard friction of the inclined iron on the back of the gate plate to push forward to achieve tight sealing. The dust accumulation and wear of the inclined iron result in poor closing of the valve and air leakage. At the same time, the bottom of the valve is designed as a dust bin structure, but the design of the plug valve plate at the bottom dust bin is similar to the upper gate plate, and it is also impossible to effectively isolate the dust bin from the upper structure. Moreover, the rubber seal design defect of the bottom valve plate makes it impossible to replace on-site. Summary of the Invention
[0005] The technical problem to be solved by the present invention is: to overcome the above-mentioned technical drawbacks and provide a blind gate valve device with a simple structure, safe operation, and capable of reliably cutting off dusty gas.
[0006] To solve the above technical problem, the technical solution proposed by the present invention is: a closed vertical blind gate valve device, including: a valve seat, a blind plate, and a blind plate ring; the valve seat is a passage with an inlet and an outlet; the blind plate ring is a circular ring located inside the valve seat, and the outlet of the valve seat has an annular boss corresponding to and cooperating with the blind plate ring; the blind plate can be inserted between the blind plate ring and the boss under the drive of a power mechanism to close the passage of the valve seat, and can also be separated from between the blind plate ring and the boss under the drive of the power mechanism to open the passage of the valve seat; One side of the boss facing the blind plate ring has a first sealing ring; one side of the blind plate ring facing the boss has a second sealing ring and a third sealing ring; the distance of the first sealing ring relative to the axis is greater than the distance of the second sealing ring relative to the axis and less than the distance of the third sealing ring relative to the axis; the distance between the second sealing ring and the third sealing ring is greater than the thickness of the first sealing ring; A flexible isolation pipe is installed between the blind plate ring and the inlet of the valve seat; a push-pull assembly connecting the blind plate ring is arranged outside the flexible isolation pipe inside the valve seat, and can drive the blind plate ring to move back and forth along the axial direction of the valve seat.
[0007] The further improvement of the above solution is: the power mechanism is installed above the valve seat; the power mechanism is connected to the blind plate through a connecting block and can drive the blind plate to move up and down; the lower part of the connecting block has an opening, the blind plate extends into the opening, and is connected together by a pin passing through the connecting block and the blind plate; the width of the opening is greater than the thickness of the blind plate.
[0008] The further improvement of the above solution is: the two sides of the blind plate ring have handles. When the blind plate ring moves from the outlet of the valve seat towards the inlet direction, if the blind plate is in the position of closing the passage of the valve seat, the handles drive the blind plate away from the first sealing ring.
[0009] A further improvement of the above solution is that: the connecting block is limited by the track, so that the connecting block can only move up and down along the track.
[0010] A further improvement of the above solution is that: at the bottom and side of the valve seat, there is a cleaning mechanism corresponding to the position of the blind plate.
[0011] A further improvement of the above solution is that: limit switches are arranged at the extreme positions of the movement of the blind plate and the blind plate ring.
[0012] A further improvement of the above solution is that: a number of roller bearings are arranged between the bottom of the blind plate ring and the valve seat.
[0013] The closed vertical blind gate valve equipment provided by the present invention adopts a design in which the sealing surface is on the blind plate ring and the valve seat, and the three seals are alternately staggered, so that the valve has three seals to protect the internal structure of the valve body from being corroded, scoured and ash deposited by the dusty gas in both the open or closed state. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic structural diagram of an open state of a preferred embodiment of the present invention.
[0015] Figure 2 is Figure 1 a side structural diagram in
[0016] Figure 3 is Figure 2 a partial enlarged structural diagram in
[0017] Figure 4 is a schematic structural diagram of a closed state of a preferred embodiment of the present invention.
[0018] Figure 5 is Figure 4 a partial enlarged structural diagram in EMBODIMENTS
[0019] Embodiment: The closed vertical blind gate valve equipment of this embodiment includes: a valve seat, a blind plate 3 and a blind plate ring 7. As Figure 1 , Figure 2 and Figure 3 shown, the valve seat is a channel with an inlet and an outlet; there is a connecting flange 6 on the end face of the valve seat; the blind plate ring 7 is a circular ring located inside the valve seat, and there is an annular boss corresponding to and mating with the blind plate ring 7 at the outlet of the valve seat; the blind plate 3 can be inserted between the blind plate ring 7 and the boss under the drive of the power mechanism 1 to close the channel of the valve seat, and can also be disengaged from between the blind plate ring 7 and the boss under the drive of the power mechanism 1 to open the channel of the valve seat.
[0020] One side of the boss facing the blind plate ring 7 is provided with a sealing ring 10; two sealing rings 9 are provided on the side of the blind plate ring 7 facing the boss; the position corresponding to the sealing ring 10 is in the middle of the two sealing rings on the blind plate ring 7.
[0021] A corrugated pipe 12 is installed between the blind plate ring 7 and the inlet of the valve seat; inside the valve seat and outside the corrugated pipe 12, a push-pull assembly 4 connecting the blind plate ring 7 is arranged, which can drive the blind plate ring 7 to move back and forth along the axial direction of the valve seat. In order to balance the movement process of the blind plate ring 7, the push-pull assembly 4 adopts a synchronous four-point oil (gas) cylinder; the four force application points are located at the four corners of the blind plate ring 7. The bottom of the blind plate ring 7 is supported by three roller bearings 13, and its raceway is slightly convex from the bottom plane.
[0022] The power mechanism 1 is installed above the valve seat; the power mechanism 1 is connected to the blind plate 3 through a connecting block 8 and can drive the blind plate 3 to move up and down; the lower part of the connecting block 8 has an opening, and the blind plate 3 extends into the opening and is connected together by a pin passing through the connecting block 8 and the blind plate 3; the width of the opening is greater than the thickness of the blind plate 3 (about three times the thickness of the blind plate). The connecting block 8 is limited by a track, so that the connecting block 8 can only move up and down along the track. The length of the pin is slightly smaller than the inner wall spacing of the track by 1-2 mm. The purpose of this length design is to keep the telescopic rod of the power mechanism 1 perpendicular throughout the lifting process and avoid damaging the static seal of the power mechanism 1 due to the lateral movement of the blind plate 3 during the pushing and pulling process.
[0023] At the bottom and side of the valve seat, corresponding to the position of the blind plate 3, a nitrogen purging mechanism 14 is provided; it is controlled by a separate valve and can be connected to a nitrogen source through an external nozzle. In the present embodiment, the sealing position is purged from bottom to top throughout the opening and closing process of the closed vertical blind gate valve device to avoid dust accumulation on the sealing surface during the opening and closing process; manholes 5 for maintenance are designed on both sides of the valve seat to facilitate the replacement of seals and the inspection of other components.
[0024] During the opening and closing process of the closed vertical blind gate valve device in this embodiment, 4 position limiters 2 are involved, namely the opening and closing limiters of the blind plate 3 and the blind plate ring 7. The limiters adopt spring-type self-resetting telescopic rod devices and are respectively installed at the upper and lower positions of the blind plate 3 and the front and rear positions of the blind plate ring 7; When the gate valve is in the open state, when the blind plate 3 moves upward to the highest position, it touches the limit 2 telescopic rod and compresses the inner rod. The thin rod on its outer side extends to contact the switch to achieve stopping when it reaches the open position. When the blind plate 3 moves downward away from the limit rod, the limit telescopic rod automatically retracts and returns to its original position by relying on the internal spring, the outer rod automatically retracts, and the outer signal is naturally lost. When the blind plate 3 reaches the bottom closed position, it touches the bottom limit rod, compresses the inner telescopic rod to make the outer telescopic rod head extend, and contacts the limit switch. At this time, the blind plate has a signal indicating that it is in the closed position. The opening of the valve is similar; the open limit of the blind plate ring 7 is the same as that of the blind plate. In the closed state of this valve, the closing limit of the blind plate ring 7 relies on the low-pressure side of the blind plate to achieve the in-place signal because the pressing stroke of the blind plate ring 7 differs by the thickness of a blind plate between the open state and the closed state of this valve.
[0025] Taking the change of the closed-type vertical blind plate gate valve device of this embodiment from the closed state to the open state as an example, its working process is described. In its closed state, as shown in Figure 4 and Figure 5 the blind plate ring 7 is pressed tightly on the blind plate 3, and the blind plate 3 is pressed tightly on the convex platform; since one side of the blind plate ring 7 is the inlet of the valve seat, this side is at high pressure. Even if the push-pull assembly 4 does not apply force, the pressing effect of the three still exists. Due to the pressing of the three, the sealing rings 9 and 10 play corresponding sealing effects, thus completely closing the gate valve, and in cooperation with the bellows 12, the push-pull assembly 4, the power mechanism 1, etc. are all isolated.
[0026] When opening, first the push-pull assembly 4 drives the blind plate ring 7 to move towards the inlet of the valve seat. The two sides of the blind plate ring 7 are provided with handles, which pull the blind plate 3 away from the convex platform. In this way, through a reasonable design of the handle size, the blind plate 3 no longer contacts the sealing ring 10. Of course, due to the separation of the blind plate ring 7, the blind plate 3 no longer contacts the sealing ring 9 either; it can effectively prevent the blind plate 3 from scratching the sealing ring. The opening of the connecting block 8 allows the blind plate 3 to move laterally within a certain range, while the connecting block 8 is restricted by the track and cannot move laterally; in this way, the lateral movement of the blind plate 3 does not affect the perpendicularity of the power mechanism 1 and avoids damage to the seal due to lateral force.
[0027] Then, the power mechanism 1 pulls the blind plate 3 upward and stops after reaching the position. The push-pull assembly 4 drives the blind plate ring 7 to move in the reverse direction and presses it tightly against the convex platform again. In this way, the sealing rings 9 and 10 form three staggered seals, thus protecting the internal structure. The open state is as shown in Figure 3 .
[0028] The closing process is to execute the above steps in reverse and will not be elaborated.
[0029] The present invention is not limited to the above embodiments. All technical solutions formed by equivalent replacement fall within the protection scope required by the present invention.
Claims
1. A closed vertical blind gate valve device, characterized in that, Comprising: A valve seat, a blind plate and a blind plate ring; the valve seat is a passage with an inlet and an outlet; the blind plate ring is a circular ring located inside the valve seat, and the outlet of the valve seat has an annular boss corresponding to and mating with the blind plate ring; the blind plate can be inserted between the blind plate ring and the boss under the drive of a power mechanism to close the passage of the valve seat, and can also be disengaged from between the blind plate ring and the boss under the drive of the power mechanism to open the passage of the valve seat; The side of the boss facing the blind plate ring has a first sealing ring; the side of the blind plate ring facing the boss has a second sealing ring and a third sealing ring; the distance of the first sealing ring relative to the axis is greater than the distance of the second sealing ring relative to the axis and less than the distance of the third sealing ring relative to the axis; the distance between the second sealing ring and the third sealing ring is greater than the thickness of the first sealing ring; A flexible isolation tube is installed between the blind plate ring and the inlet of the valve seat; a push-pull assembly connecting the blind plate ring is arranged inside the valve seat and outside the flexible isolation tube, and can drive the blind plate ring to move back and forth along the axial direction of the valve seat.
2. The enclosed vertical blind gate valve device according to claim 1, wherein: The power mechanism is installed above the valve seat; the power mechanism is connected to the blind plate through a connecting block and can drive the blind plate to move up and down; the lower part of the connecting block has an opening, the blind plate extends into the opening, and they are connected together by a pin passing through the connecting block and the blind plate; the width of the opening is greater than the thickness of the blind plate.
3. The closed vertical blind gate valve device according to claim 2, characterized in that: Both sides of the blind plate ring have handles. When the blind plate ring moves from the outlet of the valve seat towards the inlet direction, if the blind plate is in the position of closing the passage of the valve seat, the handles drive the blind plate away from the first sealing ring.
4. The enclosed vertical blind gate valve device according to claim 3, characterized in that: The connecting block is limited by a track so that the connecting block can only move up and down along the track.
5. The closed vertical blind gate valve device according to claim 4, characterized in that: A cleaning mechanism is provided at the bottom and side of the valve seat corresponding to the position of the blind plate.
6. The enclosed vertical blind gate valve device according to claim 5, characterized in that: Limit switches are provided at the extreme positions of the movement of the blind plate and the blind plate ring.
7. The closed vertical blind gate valve device according to claim 6, wherein: A number of roller bearings are provided between the bottom of the blind plate ring and the valve seat.