Intelligent electric knife-type gate valve
By combining the lifting and sealing mechanisms, the problem of damage caused by the collision between the gate and solid particles is solved, resulting in better sealing and extended service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QIDONG YONGAN VALVE CO LTD
- Filing Date
- 2023-08-11
- Publication Date
- 2026-07-07
AI Technical Summary
When the gate of a knife gate valve descends, it collides with solid particles, causing damage to the gate and poor sealing, thus shortening the valve's service life.
The design employs a combination of lifting and sealing mechanisms. Before the gate descends, the lifting mechanism raises the middle of the valve flow channel, and the sliding plate reduces the accumulation of solid particles. The sealing mechanism tightens the seal when the gate descends, reducing friction and improving sealing performance.
It effectively avoids direct collision between the gate and solid particles, improves the stability and sealing of the valve, and extends the service life of the valve.
Smart Images
Figure CN116906606B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of valves, and more specifically to an intelligent electric knife gate valve. Background Technology
[0002] A knife gate valve is a type of valve used to cut off or connect pipelines containing media such as solid particles, fibrous materials, slurries, and mud. Its opening and closing element is a gate, shaped like a knife edge, which cuts off impurities in the medium when closed, preventing them from accumulating or adhering to the sealing surface and affecting the valve's sealing performance and service life. Knife gate valves can be driven by manual, sprocket, electric, pneumatic, hydraulic, bevel gear, electro-hydraulic, and pneumatic-hydraulic actuators. Electric knife gate valves use electric actuators to control the valve's opening and closing, making operation more convenient and flexible. Knife gate valves are made of materials such as cast iron, cast steel, carbon steel, and stainless steel. Knife gate valves are advantageous in industries with high requirements for handling media containing solid particles, such as mining and fly ash treatment.
[0003] When using knife gate valves in the transportation of media containing solid particles, it is necessary to pay attention to the particle size. Solid particles of varying sizes may be present. If the knife gate valve cannot accommodate larger particles, the risk of the gate colliding with the particles during closure increases. Such collisions may cause the gate to press against the solid particles, damaging the gate, affecting the valve's sealing performance, and even shortening the service life of the knife gate valve.
[0004] To address the aforementioned issues, a common solution is to use a sharper knife-shaped gate in the knife gate valve. When the valve is closed, the sharpness of the gate cuts through solid particles in the flowing medium, reducing flow resistance and loss, and improving the valve's smoothness and throughput. However, the manufacturing and maintenance costs of a sharper knife gate are higher, requiring special materials and processes to ensure its sharpness. Furthermore, the knife gate generates noise and vibration when cutting through solid particles, affecting the valve's stability and lifespan.
[0005] Another common solution is to use a full-bore design for knife gate valves. A full-bore design means the valve's passage diameter is the same as or close to the pipe diameter, resulting in strong medium flow capacity, low resistance, and minimal flow loss. This also reduces the likelihood of material buildup inside the valve, thus extending its service life. However, a full-bore design leads to lower sealing pressure between the gate and the sealing surface, affecting the valve's sealing performance and reliability. Furthermore, a full-bore design subjects the gate to greater impact forces when closing, causing wear or damage between the gate and the sealing surface, reducing the valve's durability.
[0006] To address the aforementioned problems and reduce the direct contact between the gate of the knife gate valve and solid particles during the descent process, thereby improving the service life of the knife gate valve, this invention provides an intelligent electric knife gate valve. Summary of the Invention
[0007] The technical problem to be solved by this invention is that in a medium containing solid particles, the gate of a knife gate valve collides with the solid particles when it descends, causing the gate to press against the solid particles, damaging the blades and affecting the sealing effect of the valve, and even shortening the service life of the knife gate valve.
[0008] To achieve the above objectives, the present invention provides the following technical solution:
[0009] A smart electric knife gate valve includes a valve cover, a gate, an actuator, and a power rod. The lower end of the actuator is fixedly connected to the top end of the valve cover. The power rod is slidably installed inside the actuator. The upper end of the gate is fixedly connected to the lower end of the power rod. The valve body is fixedly installed at the lower end of the valve cover. A lifting mechanism is fixedly installed inside the valve body. When closing the knife gate valve, the lifting mechanism first raises the middle of the valve flow channel, contacts the gate, and then descends along with the gate. A sealing mechanism is slidably installed inside the valve body. The sealing mechanism is tightened when the lifting mechanism descends along with the gate, and then retracts when the lifting mechanism rises along with the gate. An information module is fixedly installed inside the actuator. The information module is used to remotely monitor the current information status of the valve.
[0010] When the valve is open, its flow path is similar to other valves. When the valve is closed, it differs from other similar valves in that a sliding plate rises inside. This sliding plate, though not very long, effectively removes solid particles that accumulate below the gate, preventing them from being squeezed against the bottom of the valve flow path when the gate descends. This effectively extends the gate's lifespan and thus the valve's lifespan. When the lifting mechanism rises, it drives the slider of the sealing mechanism to rise, reducing friction when the gate descends. When the lifting mechanism and the gate descend together, the sliding plate of the sealing mechanism begins to descend, tightening the gate and improving the valve's sealing performance.
[0011] The lifting mechanism includes a sliding plate, a lower sealing ring, a sliding shaft, a side spring, a side slide rod, and a lifting spring. The lower sealing ring is fixedly installed in the valve body, and a lower slide rail is provided at the bottom end of the lower sealing ring. The sliding plate is slidably installed in the slide rail of the lower sealing ring. The lower sealing ring has a C-shaped structure. The sliding shaft is slidably installed in the valve body, and the upper end of the sliding shaft is fixedly connected to the bottom of the sliding plate. There are 1-3 sliding shafts. The lower end of the lifting spring is fixedly installed at the lower end of the valve body, and the upper end of the lifting spring is fixedly connected to the lower end of the sliding shaft. The lifting spring is cylindrical. The upper end of the side slide rod is slidably installed inside the valve body, and the lower end of the side slide rod is slidably installed inside the valve body. One end of the side spring is fixed to one side of the valve body, and there are 1-4 side springs. The other end of the side spring is fixed to one side of the side slide rod.
[0012] When the lifting mechanism is rising, the side slide bar is triggered when the gate is closed. The sliding plate begins to rise due to the action of the lifting spring. When the sliding plate of the lifting mechanism is raised, the solid particles in the middle of the valve flow channel are reduced. Since the sliding plate is directly below the gate, it can effectively avoid direct collision with larger solid particles at the bottom of the valve flow channel when the gate is descending.
[0013] When the lifting mechanism descends, the sliding plate is driven by the gate plate to begin descending when it contacts the gate plate. Due to the lifting spring at the bottom of the sliding plate, a damping effect is generated when the gate plate contacts the bottom of the valve flow channel. When the sliding plate slides to the bottom, it slides into the slot of the side slide rod, keeping the top of the sliding plate flush with the valve flow channel, making the medium flow smoother when the valve is opened.
[0014] The valve body has a lower sealing groove, an outer sealing groove, a lifting rail, an upper slide rail, a lower slide rail, a sealing hole, a side slide rail, and an upper sealing groove. The lower sealing groove is U-shaped, which increases the contact area and improves the sealing effect. The lower sealing groove is installed in conjunction with the lower sealing ring of the lifting mechanism. The lower sealing groove is located at the lower end of the valve body, and its thickness is 1 / 3 of the valve body's thickness. This helps ensure the structural and functional coordination between the valve body and the sealing groove, providing reliable sealing performance and ease of manufacturing. The outer sealing groove is a long strip structure and is located on both sides of the valve body. The lifting rail is located at the bottom of the valve body. The lower sealing groove is installed in conjunction with the sliding shaft of the lifting mechanism. The upper and lower slide rails are located at the upper and lower ends of the valve body, respectively, and are distributed on one side of the valve body. The lower sealing groove is installed in conjunction with the side slide rod of the lifting mechanism.
[0015] The lower sealing groove is semi-circular and is used for the installation of the lower sealing groove of the lifting mechanism. It is designed to cooperate with the gate to make tight contact and achieve a better sealing effect. The outer sealing groove is a long strip structure, which can achieve a sealing effect while occupying less internal space of the valve body, and is more conducive to the installation of the sealing mechanism.
[0016] The lower sealing ring adopts a semi-circular structure, with the opening of the sealing ring facing the bottom of the gate plate, which improves the sealing effect of the valve body. The number of sliding shafts can be set to 1-3 according to specific needs. When there is less than 1 sliding shaft, the sliding plate cannot rise through the sliding shaft. When there are more than 3 sliding shafts, it will occupy more space inside the valve body, and the rising effect of the sliding plate will not bring a greater improvement. When the number of sliding shafts is selected from 1 to 3, it can be selected according to the specific implementation environment and the size of the valve channel, so as to make the sliding plate more stable. The side spring is cylindrical, which can make the spring force more evenly distributed, make the spring installation simpler, and save more installation space. In order to make the pop-out of the sliding plate have a more stable stress distribution, stable mechanical properties, and easy manufacturing and installation, a cylindrical side spring is selected in this case.
[0017] The upper end of the sliding plate has a concave arc-shaped structure, and the diameter of the concave part is the same as the diameter of the lower end of the gate. The sliding plate and the slide rail of the lower sealing ring are fitted with a clearance, and the size of the clearance is between 0.01-0.02mm.
[0018] In the above description, the sliding plate adopts a concave arc-shaped structure, and the diameter of its concave portion is the same as the diameter of the lower end of the knife gate. When the gate descends, it can better cooperate with it, resulting in better sealing of the valve when closed. The thickness of the sliding plate is less than the thickness of the sliding groove of the sliding sealing ring, so that the sliding plate can slide better within the sliding sealing ring. To ensure the sealing effect between the sliding plate and the sliding sealing ring, the gap between the thickness of the sliding plate and the thickness of the sliding groove of the sliding sealing ring is between 0.01-0.02 mm. When the gap is less than 0.01 mm, the friction will increase, causing jamming. When it is greater than 0.02 mm, leakage will occur, thereby reducing the sealing effect.
[0019] The upper end of the side slide bar has an isosceles triangular protrusion, the long side of which coincides with the side slide bar. The lower end of the side slide bar has a right-angled triangular protrusion, the short side of which coincides with the side slide bar. The upper and lower ends of the side slide bar have raised square blocks, and the thickness of the square blocks is in a 2:1 ratio to the thickness of the side slide bar.
[0020] The upper end of the side slide rod is provided with an isosceles triangular protrusion, so that the gate can drive the side slide rod to retract inward when it descends. The lower end of the slide rod has a right-angled triangular protrusion, which is to better lock the sliding plate and allow the medium in the valve flow channel to flow better. The square protrusions at the upper and lower ends of the side slide rod are to facilitate the sliding of the side slide rod in the valve body.
[0021] When the valve is preparing to close, the gate rises slightly. Because the lower part of the gate is semi-circular, it reduces contact with the isosceles triangular protrusion at the upper end of the sliding rod. Due to the action of the side spring, the sliding rod slides inward. At this point, the right-angled triangular protrusion at the lower end of the sliding rod is misaligned with the extended portion of the sliding shaft. The lower spring, due to its own rebound force, pushes the sliding shaft, which in turn drives the sliding plate, causing the sliding plate to rise. After the gate rises slightly, it begins to descend. At this point, the gate contacts the isosceles triangular protrusion above the sliding rod, and the sliding rod slides outward. When the gate contacts the sliding plate, it drives the sliding plate to descend. The sliding plate then drives the sliding shaft to descend. The deeper portion of the sliding shaft passes the right-angled triangular protrusion below the sliding rod, and the extended portion of the sliding shaft slides over the hypotenuse of the right-angled triangular protrusion, thus locking the sliding shaft below the sliding rod, and the sliding plate remains in the slot.
[0022] The sealing mechanism includes a sliding plate, a sealing plate, an upper sealing ring, and a sliding plate. The sliding plate is slidably installed on the outside of the outer sealing groove, and there are two sliding plates. The sealing plate is slidably installed on the inside of the outer sealing groove, and there are two sealing plates. The bottom end of the sliding plate is hinged to the upper end of the sliding plate, and there are two sliding plates. The sliding plate is L-shaped. The upper sealing ring is fixedly installed in the upper sealing groove of the valve body, and the upper sealing ring has a C-shaped structure.
[0023] There are two sliding vanes, which are slidably installed in the left and right sealing grooves respectively. During sealing, the two vanes slide together, thereby improving the sealing effect. There are also two sealing plates, corresponding one to one of the vanes. When the vanes slide, they can tighten the plates, thereby improving the valve's sealing performance. The vanes adopt an L-shaped structure, which makes it easier to connect with the slide plate. The upper sealing ring adopts a C-shaped structure, which works together with other sealing rings to seal the valve as a whole.
[0024] The upper end of the slide plate is trapezoidal, and the lower end of the slide plate has a sliding hole that is hinged to the sliding plate. The cross-sectional area of the slide plate is 0.35-0.55 times that of the outer sealing groove, and the thickness of the slide plate is in a ratio of 2:1 to the thickness of the outer sealing groove of the valve body.
[0025] The upper end of the sliding plate is trapezoidal. To tighten the sealing plate during its downward movement, the cross-sectional area of the sliding plate is 0.35-0.55 times that of the outer sealing groove. This ensures that the volumes of the sliding plate and the sealing plate within the outer sealing groove are approximately equal, allowing for better fit. When the sliding plate is less than 0.35 times the outer sealing groove, fewer sliding plates are distributed within the sealing groove, and the thickness of the sliding plate becomes thinner, thus reducing its stability. When the sliding plate is greater than 0.55 times the outer sealing groove, more sliding plates are distributed within the sealing groove, and the thickness of the sealing plate decreases. When the cross-sectional area of the sliding plate is 0.35-0.55 times that of the outer sealing groove, ensuring that the volumes of the sliding plate and the sealing plate within the outer sealing groove are approximately equal, and allowing for better fit, the thickness of the sliding plate is twice that of the sealing groove, enabling the valve to achieve a better sealing effect when the valve body is closed.
[0026] The sealing sheet is trapezoidal, and its cross-sectional area is 0.4-0.6 times that of the outer sealing groove. The thickness of the outer sealing groove is half the thickness of the sealing sheet.
[0027] The sealing plate is trapezoidal. To cooperate with the sliding plate and achieve a better sealing effect, the cross-sectional area of the sealing plate is 0.4-0.6 times the sealing groove. This ensures sufficient space within the sealing groove, making the volumes of the sliding plate and the sealing plate approximately equal within the outer sealing groove, allowing for better fit. When the sealing plate is less than 0.4 times the outer sealing groove, fewer sliding plates are distributed within the sealing groove, and the sealing plate becomes thinner, reducing its stability. When the sealing plate is greater than 0.6 times the outer sealing groove, more sealing plates are distributed within the sealing groove, while the thickness of the sliding plate decreases. When the cross-sectional area of the sealing plate is 0.35-0.55 times the outer sealing groove, making the volumes of the sealing plate and the sliding plate approximately equal within the outer sealing groove, allowing for better fit, the thickness of the sealing plate is twice the sealing groove, enabling the valve to achieve a better sealing effect in a closed configuration.
[0028] When the lifting mechanism begins to descend, the sliding plate of the sealing mechanism begins to slide down. The trapezoidal body of the sliding plate and the trapezoidal body of the sealing plate cooperate with each other. During the sliding plate's descent, the sealing plate and the side of the gate are tightened more effectively, thereby achieving a sealing effect. When the gate begins to rise, the lifting mechanism will rise slightly due to the action of the spring. The rise of the lifting mechanism drives the sliding plate to rise, thereby reducing the tightness between the sealing plate and the gate, thus reducing the friction of the gate and extending the service life of the gate.
[0029] The information module includes a main control chip, a power supply module, and a wireless module. The main control chip is fixedly installed inside the actuator and controls the actuator using a communication protocol. The wireless module is fixedly installed inside the actuator and can automatically switch between different 5G frequency bands and modes according to the working environment and signal conditions of the knife gate valve. The power supply module is fixedly installed inside the actuator and can automatically start or stop the energy recovery function according to the working requirements and power status of the knife gate valve.
[0030] The information module enables remote control of the valve. Utilizing advanced technology, this module allows users to remotely control the valve's opening and closing without direct contact. Through a wireless connection to the valve system, the information module receives user-sent commands and transmits them to the valve actuator for precise operation.
[0031] The beneficial effects of this invention are as follows:
[0032] 1. By cooperating with the lifting mechanism and the sealing mechanism, the knife gate valve can effectively avoid collisions with solid particles contained in the flowing medium at the bottom of the valve flow channel when it is closed, thereby improving the stability of the valve. When the lifting mechanism is working, it drives the sealing mechanism to seal the valve, making the valve's sealing performance better. Through the above cooperation, the valve as a whole has higher stability, extends the service life of the valve, and increases the valve's sealing performance.
[0033] 2. By employing a lifting mechanism, when the knife gate valve is closed, the sliding plate rises as the gate descends. This design reduces the amount of solid particles remaining in the valve's flow path. Since the sliding plate is located directly below the gate, it effectively prevents larger solid particles from directly colliding with the bottom of the valve's flow path when the gate descends. This design improves the valve's service life and stability, reduces damage to the gate from solid particles, and thus ensures the valve's normal operation and reliability.
[0034] 3. By employing a sealing mechanism, when the knife gate valve is closed, the lifting mechanism drives the sliding plates on both sides of the sealing mechanism, causing the sealing plates on both sides to contract, thereby enhancing the valve's sealing performance and stability. This design effectively prevents media leakage, ensures the normal operation of the valve, and improves its performance and reliability. Attached Figure Description
[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0036] Figure 1 This is an overall schematic diagram of the invention;
[0037] Figure 2 This is a front view of the present invention;
[0038] Figure 3 This is the left view of the present invention;
[0039] Figure 4 This is a top view of the present invention;
[0040] Figure 5 This is an internal view of the valve body of the present invention;
[0041] Figure 6 This is a front view of the valve body of the present invention;
[0042] Figure 7 This is a schematic diagram of the side slide bar of the present invention;
[0043] Figure 8 This is a schematic diagram of the sliding plate of the present invention;
[0044] Figure 9 This is a schematic diagram of the slider of the present invention;
[0045] Figure 10 This is a schematic diagram of the sealing sheet of the present invention;
[0046] Figure 11 This is a schematic diagram of the information module of the present invention.
[0047] In the diagram: 1. Valve cover; 2. Gate; 3. Actuator; 4. Power rod; 5. Valve body; 58. Upper sealing groove; 51. Lower sealing groove; 52. Outer sealing groove; 53. Lifting rail; 54. Upper slide rail; 55. Lower slide rail; 56. Sealing hole; 57. Side slide rail; 6. Lifting mechanism; 61. Sliding plate; 62. Lower sealing ring; 63. Sliding shaft; 64. Side spring; 65. Side slide rod; 66. Lifting spring; 7. Sealing mechanism; 71. Sliding plate; 711. Sliding hole; 72. Sealing plate; 73. Upper sealing ring; 74. Slide plate; 8. Information module; 81. Main control chip; 82. Power supply module; 83. Wireless module. Detailed Implementation
[0048] To better understand the above technical solutions, this specification will provide a detailed and clear description of the technical solutions in conjunction with the accompanying drawings and specific embodiments. Through these descriptions, readers can gain a deeper understanding of the implementation methods and principles of this technical solution, thereby better understanding the advantages and application value of the present invention.
[0049] Example 1:
[0050] like Figure 1-4 As shown, an intelligent electric knife gate valve includes a valve cover 1, a gate 2, an actuator 3, and a power rod 4. The lower end of the actuator 3 is fixedly connected to the top end of the valve cover 1. The power rod 4 is slidably installed inside the actuator 3. The upper end of the gate 2 is fixedly connected to the lower end of the power rod 4. The valve body 5 is fixedly installed at the lower end of the valve cover 1. A lifting mechanism 6 is fixedly installed inside the valve body 5. When the knife gate valve is closed, the lifting mechanism 6 first raises the middle of the valve flow channel, contacts the gate 2, and then descends along with the gate 2. A sealing mechanism 7 is slidably installed inside the valve body 5. The sealing mechanism 7 is tightened when the lifting mechanism 6 descends along with the gate 2, and is also slightly retracted when the lifting mechanism 6 rises along with the gate 2. An information module 8 is fixedly installed inside the actuator 3.
[0051] When the knife gate valve needs to be closed, the information module 8 receives the closing signal via the wireless module 83. The information module 8 then sends a valve closing signal to the actuator 3. After receiving the signal, the actuator 3 causes the gate 2 to rise a certain distance. Simultaneously, the gate 2 triggers the sliding plate 74 within the lifting mechanism 6 to rise. As the sliding plate 74 rises, it also drives the sliding plate 71 of the sealing mechanism 7 to rise, thereby miniaturizing the sealing plates 72 on both sides of the valve and reducing the friction of the gate 2 during its descent, thus extending its service life. The rising sliding plate 74 also raises the height of the middle section of the valve flow channel, reducing the amount of solid particles directly below the gate 2. This prevents the gate 2 from closing when it descends to engage with the sliding plate 74 of the triggering mechanism. Gate 2 directly collides with larger solid particles at the bottom of the valve flow channel, thereby improving the service life of gate 2 and the sealing performance of the valve. After gate 2 contacts the sliding plate 74 of the lifting mechanism 6, gate 2 continues to descend along with the sliding plate 74 of the lifting mechanism 6. When the sliding plate 74 of the lifting mechanism 6 descends, it drives the sliding plate 71 of the sealing mechanism 7 to begin to descend, thereby tightening the sealing plates 72 on both sides of the valve and improving the sealing performance of the valve. A spring is installed under the sliding plate 74 of the lifting mechanism 6, which has a certain shock absorption effect when gate 2 contacts the sliding plate 74 of the lifting mechanism 6, further improving the stability of the valve. Until gate 2 contacts the bottom of the valve flow channel, the valve is completely closed. At the same time, due to the effect of the spring in the lifting mechanism 6, the sliding plate 74 of the lifting mechanism 6 will be more closely attached to gate 2.
[0052] When the gate valve needs to be opened, the information module 8 receives the opening signal through the wireless module 83. The information module 8 then sends a valve opening signal to the actuator 3. After receiving the signal, the actuator 3 slowly raises the gate plate 2, and the valve opens.
[0053] like Figure 5As shown, the valve body 5 has a lower sealing groove 51, an outer sealing groove 52, a lifting rail 53, an upper slide rail 54, a lower slide rail 55, a sealing hole 56, a side slide rail 57, and an upper sealing groove 58. The lower sealing groove 51 is U-shaped and is installed in conjunction with the lower sealing ring 62 of the lifting mechanism 6. The lower sealing groove 51 is located at the lower end of the valve body 5, and its thickness is 1 / 3 of the thickness of the valve body 5. The outer sealing groove 52 is a long strip structure and is located on both sides of the valve body 5. The lifting rail 53 is located at the bottom of the valve body 5. The lower sealing groove 51 is installed in conjunction with the sliding shaft 63 of the lifting mechanism 6. The upper slide rail 54 and the lower slide rail 55 are located at the upper and lower ends of the valve body 5, respectively, and are distributed on one side of the valve body 5. The lower sealing groove 51 is installed in conjunction with the side slide rod 65 of the lifting mechanism 6.
[0054] The design of the sealing groove improves the sealing effect of the valve body 5 and gives it characteristics that are different from other knife gate valves. The outer sealing groove 52 is equipped with an adjustable sealing plate 72. The design of the sealing groove of the valve body 5 provides a good foundation for the lifting mechanism 6 and the sealing mechanism 7.
[0055] like Figure 6 As shown, the lifting mechanism 6 includes a sliding plate 61, a lower sealing ring 62, a sliding shaft 63, a side spring 64, a side sliding rod 65, and a lifting spring 66. The lower sealing ring 62 is fixedly installed in the lower sealing groove 51 of the valve body 5. A lower sliding rail 55 is provided at the bottom end of the lower sealing ring 62. The sliding plate 61 is slidably installed in the sliding rail of the lower sealing ring 62. The lower sealing ring 62 has a C-shaped structure. The sliding shaft 63 is slidably installed in the lifting rail 53 of the valve body 5. The upper end of the sliding shaft 63 is connected to the bottom of the sliding plate 61. The valve body 5 is fixedly connected to the sliding shaft 63, which is provided in 1-3 parts. The lower end of the lifting spring 66 is fixedly installed on the lower end of the lifting rail 53 of the valve body 5, and the upper end of the lifting spring 66 is fixedly connected to the lower end of the sliding shaft 63. The spring is cylindrical. The upper end of the side slide rod 65 is slidably installed in the upper slide rail 54 of the valve body 5, and the lower end of the side slide rod 65 is slidably installed in the lower slide rail 55 of the valve body 5. One end of the side spring 64 is fixed to one side of the valve body 5, and the other end of the side spring 64 is fixed to one side of the side slide rod 65.
[0056] The lifting mechanism 6 rises when the valve is about to close, raising the height of the valve flow channel. This prevents the medium flowing inside the valve from lingering in the flow channel, thus preventing direct contact between the gate 2 and solid particles in the flow channel when the gate 2 descends. Unlike other knife gate valves, which crush solid particles at the lower end of the flow channel, the lifting mechanism 6 descends when the gate 2 descends. Due to the action of the side sliding rod 65, the sliding plate 61 of the lifting mechanism 6 is engaged below the side sliding rod 65. When the valve is open, the lifting mechanism 6 remains in the descended state, ensuring the flow of the medium within the valve.
[0057] To achieve a better sealing effect, a C-shaped structure with a larger contact area is selected, which prevents media leakage when closed and ensures reliable valve sealing. Since low frictional resistance and opening / closing force are required when the gate 2 is raised and lowered, the sliding shaft 63 has the function of raising and lowering the sliding plate 61. The stability of the sliding shaft 63 can be improved by setting the number of sliding shafts 63. Too many sliding shafts 63 will waste space in the valve body 5, and installing too many will not produce any benefit. In this embodiment, one sliding shaft 63 is selected and installed in the center below the sliding plate 61 to ensure the stability of the sliding plate 61.
[0058] like Figure 7 As shown, the upper end of the side slide rod 65 has an isosceles triangular protrusion, the long side of which coincides with the side slide rod 65. The lower end of the side slide rod 65 has a right-angled triangular protrusion, the short side of which coincides with the side slide rod 65. The upper and lower ends of the side slide rod 65 have raised square blocks, the thickness of which is twice the thickness of the side slide rod 65.
[0059] The isosceles triangular protrusion at the upper end of the side slide rod 65 causes the side of the gate plate 2 to contact the isosceles triangular protrusion of the side slide rod 65, thereby causing the right-angled triangular protrusion at the lower end of the slide rod to extend outward. Due to the effect of the inclined plane of the right-angled triangle, the sliding plate 61 can slide into the lower end of the right-angled triangle when descending and be stuck by the right-angled side, thereby controlling the rise of the sliding plate 61 of the lifting mechanism 6. When the valve is closed, the gate plate 2 will rise a certain distance first so that the gate plate 2 does not contact the isosceles triangle at the upper end of the side slide rod 65. Due to the action of the side spring 64 next to the side slide rod 65, the side slide rod 65 slides inward, so that the right-angled triangular protrusion at the lower end of the side slide rod 65 is further inward, and thus the sliding plate 61 of the lifting mechanism 6 begins to rise.
[0060] To allow the side slide rod 65 to slide gradually when it contacts the gate plate 2, minimizing the contact area and friction between them, an isosceles triangular protrusion was chosen. To ensure the sliding plate 61 of the lifting mechanism 6 can be fixed below and easily locked during descent, a right-angled triangular protrusion was chosen. To save space within the valve body 5 and ensure stable sliding, sliders twice the thickness of the side slide rod 65 were installed at both ends of the side slide rod 65.
[0061] like Figure 8 As shown, the upper end of the sliding plate 61 has a concave C-shaped structure, and the diameter of this concave part is the same as the diameter of the lower end of the gate plate 2. The thickness of the sliding plate 61 is less than the groove gap of the sliding sealing ring by 0.01-0.02 mm.
[0062] To increase the contact area and improve the sealing performance between the sliding plate 61 and the gate 2, the sliding plate 61 adopts a C-shaped structure with the same diameter. The upper end of the sliding plate 61 has a concave structure that cooperates with the lower end of the gate 2's protruding C-shaped structure, thereby achieving a better sealing effect. To improve the sealing performance of the lifting mechanism 6, the thickness of the sliding plate 61 should be as close as possible to the groove gap of the sealing ring, while still ensuring its sealing effect. Therefore, the thickness of the sliding plate 61 is chosen to be 0.01-0.02 mm less than the groove gap of the sliding sealing ring.
[0063] like Figure 6 As shown, the sealing mechanism 7 includes a sliding plate 71, a sealing plate 72, an upper sealing ring 73, and a sliding plate 74. The sliding plate 71 is slidably installed on the outside of the outer sealing groove 52, and there are two sliding plates 71. The sealing plate 72 is slidably installed on the inside of the outer sealing groove 52, and there are two sealing plates 72. The bottom end of the sliding plate 71 is hinged to the upper end of the sliding plate 74, and there are two sliding plates 71. The sliding plate 71 is L-shaped. The upper sealing ring 73 is fixedly installed in the upper sealing groove 58 of the valve body 5, and the upper sealing ring 73 has a C-shaped structure.
[0064] When the sliding plate 61 of the lifting mechanism 6 begins to descend, the sliding plate 61 drives the sliding shaft 63 below it to descend as well. As the sliding shaft 63 descends, it drives the sliding plate 71 to slide. While sliding, the sliding plate 71 cooperates with the sealing plate 72, making the sealing plate 72 fit more closely inward. Since the valve is closing at this time, after the gate 2 is completely closed, the sliding plate 71 of the sealing mechanism 7 also stops sliding. At this time, the sealing plate 72 remains in contact with the inside of the valve body 5, thereby achieving a better sealing effect. When the sliding plate 61 rises, the sliding plate 71 also begins to slide upward, thereby causing the sealing plate 72 to return to its initial contact state and the gate 2 to begin to slide. The friction of the gate 2 during sliding will also be relatively reduced.
[0065] like Figure 9 As shown, the upper end of the slide plate 71 is trapezoidal, and the lower end of the slide plate 71 is provided with a sliding hole 711 that is hinged to the slide plate 74. The cross-sectional area of the slide plate 71 is 0.35-0.55 times that of the outer sealing groove 52, and the ratio of the thickness of the slide plate 71 to the thickness of the outer sealing groove 52 of the valve body 5 is 2:1.
[0066] like Figure 10 As shown, the sealing sheet 72 is a trapezoidal body, the cross-sectional area of the sealing sheet 72 is 0.4-0.6 times that of the sealing groove, and the thickness of the sealing sheet 72 is twice that of the sealing groove.
[0067] To enable the sliding plate 71 to cooperate with the sealing plate 72, and to allow the sliding plate 71 to slide and drive the sealing plate 72 to tighten inward and maintain its initial state, the sliding plate 71 and the sealing plate 72 are ultimately chosen to be trapezoidal. The sliding plate 71 and the sealing plate 72 form an opposite trapezoidal shape. When the sliding plate 71 and the sealing plate 72 are in contact, they can form a square shape. To allow them to be more evenly distributed in the outer sealing groove 52, the cross-sectional area of the sliding plate 71 is between 0.35 and 0.55 times the size of the sealing groove, and the cross-sectional area of the sealing plate 72 is between 0.4 and 0.6 times the size of the sealing groove.
[0068] like Figure 11 As shown, the information module 8 includes a main control chip 81, a power supply module 82, and a wireless module 83. The main control chip 81 is fixedly installed inside the actuator 3 and controls the actuator 3 using a communication protocol. The wireless module 83 is fixedly installed inside the actuator 3 and can automatically switch between different 5G frequency bands and modes according to the working environment and signal conditions of the knife gate valve. The power supply module 82 is fixedly installed inside the actuator 3 and can automatically start or stop the energy recovery function according to the working requirements and power status of the knife gate valve.
[0069] To make knife gate valves smarter and easier to use, they are being moved to the cloud, making operation more convenient and monitoring simpler. A cloud monitoring platform can control the opening and closing of the knife gate valve and its current status in real time. The knife gate valve synchronizes its current status to the cloud monitoring platform through information module 8, facilitating monitoring. Similar methods can be used to connect all valves in the production environment to the cloud monitoring platform, achieving a unified and integrated remote monitoring solution.
[0070] In the use of the intelligent knife gate valve of the present invention, the user remotely controls the knife gate valve by sending a signal to the signal module. When the user sends an open command, the knife gate valve opens. At this time, the actuator 3 controls the gate plate 2 to start rising, and the medium begins to pass through. When the user sends a close command, the knife gate valve closes. At this time, the actuator 3 first controls the gate plate 2 to rise a certain distance. During the rising process, the gate plate 2 does not contact the isosceles triangular protrusion of the side slide rod 65 of the lifting mechanism 6. At this time, due to the action of the side spring 64 on one side of the side slide rod 65, the side slide rod 65 slides inward, thereby the right-angled triangular protrusion at the bottom of the side slide rod 65 cancels the restriction on the lifting mechanism 6. The side slide plate 74 behind the lifting mechanism is affected by the lower spring and The sliding shaft 63 begins to rise, at which point the gate 2 begins to fall. As the gate 2 falls, it contacts the isosceles triangular protrusion at the upper end of the side sliding rod 65, causing the side sliding rod 65 to slide outward. Consequently, the right-angled triangle at the lower end of the side sliding rod 65 also slides outward. The side sliding rod 65 returns to its initial position, and the gate 2 continues to fall. When the gate 2 contacts the sliding plate 61, it drives the sliding plate 61 to continue falling. As the sliding plate 61 falls, it drives the sliding plate 71 of the sealing mechanism 7 to begin to slide down. As the sliding plate 71 slides down, the sealing plate 72 begins to tighten inward. When the gate 2 falls to the bottom, the valve is completely closed. The sliding plate 61 remains stationary due to the action of the sliding plate 71, waiting to rise again when the valve begins to close.
[0071] Although the beneficial effects of the present invention have been shown in detail and embodiments have been provided in this specification, those skilled in the art can make various changes, modifications, substitutions, and variations based on these embodiments without departing from the principles and spirit of the present invention, thereby expanding the scope of application of the present invention. Therefore, the scope of protection of the present invention should be defined by the appended claims and their equivalents.
Claims
1. A smart electric knife gate valve, comprising a valve cover (1), a gate (2), an actuator (3), and a power rod (4), wherein the lower end of the actuator (3) is fixedly connected to the top end of the valve cover (1), the power rod (4) is slidably installed inside the actuator (3), and the upper end of the gate (2) is fixedly connected to the lower end of the power rod (4), characterized in that: A valve body (5) is fixedly installed at the lower end of the valve cover (1). A lifting mechanism (6) is fixedly installed inside the valve body (5). When the knife gate valve is closed, the lifting mechanism (6) first raises the middle part of the valve flow channel, and after contacting the gate plate (2), it descends along with the gate plate (2). A sealing mechanism (7) is slidably installed inside the valve body (5). The sealing mechanism (7) is driven to tighten when the lifting mechanism (6) descends along with the gate plate (2). The sealing mechanism (7) is driven to shrink when the lifting mechanism (6) rises along with the gate plate (2). An information module (8) is fixedly installed inside the actuator (3). The lifting mechanism (6) includes a sliding plate (61), a lower sealing ring (62), a sliding shaft (63), a side spring (64), a side slide rod (65), and a lifting spring (66). The lower sealing ring (62) is fixedly installed inside the valve body (5). A lower slide rail (55) is provided at the bottom end of the lower sealing ring (62). The sliding plate (61) is slidably installed inside the slide rail of the lower sealing ring (62). The lower sealing ring (62) has a C-shaped structure. The sliding shaft (63) is slidably installed inside the valve body (5). The upper end of the sliding shaft (63) is fixedly connected to the bottom of the sliding plate (61). One to three sliding shafts (63) are provided. The lower end of the lifting spring (66) is fixedly installed at the lower end of the valve body (5). The upper end of the lifting spring (66) is fixedly connected to the lower end of the sliding shaft (63). The lifting spring (66) is cylindrical. The upper end of the side slide rod (65) is slidably installed inside the valve body (5). The lower end of the side slide rod (65) is slidably installed inside the valve body (5). One end of the side spring (64) is fixed to one side of the valve body (5). One to four side springs (64) are provided. The other end of the side spring (64) is fixed to one side of the side slide rod (65).
2. The intelligent electric knife gate valve according to claim 1, characterized in that: The valve body (5) is provided with a lower sealing groove (51), an outer sealing groove (52), a lifting rail (53), an upper slide rail (54), a lower slide rail (55), a sealing hole (56), a side slide rail (57), and an upper sealing groove (58). The lower sealing groove (51) is U-shaped and is installed in conjunction with the lower sealing ring (62) of the lifting mechanism (6). The lower sealing groove (51) is located at the lower end of the valve body (5), and the thickness of the lower sealing groove (51) is 1 / 3 of the thickness of the valve body (5). The outer sealing groove (52) is a long strip structure. The outer sealing groove (52) is opened on both sides of the valve body (5). The lifting rail (53) is opened at the bottom of the valve body (5). The lower sealing groove (51) is installed in cooperation with the sliding shaft (63) of the lifting mechanism (6). The upper sliding rail (54) and the lower sliding rail (55) are respectively opened at the upper and lower ends of the valve body (5) and distributed on one side of the valve body (5). The lower sealing groove (51) is installed in cooperation with the side sliding rod (65) of the lifting mechanism (6).
3. The intelligent electric knife gate valve according to claim 1, characterized in that: The upper end of the side slide bar (65) has an isosceles triangular protrusion, the long side of which coincides with the side slide bar (65). The lower end of the side slide bar (65) has a right-angled triangular protrusion, the short side of which coincides with the side slide bar (65). The upper and lower ends of the side slide bar (65) have raised square blocks, the thickness of which is in a ratio of 2:1 to the thickness of the side slide bar (65).
4. The intelligent electric knife gate valve according to claim 1, characterized in that: The upper end of the sliding plate (61) has a concave arc structure, and the diameter of the concave part is the same as the diameter of the lower end of the gate (2). The sliding plate (61) and the lower sealing ring (62) are fitted with a clearance in the slide rail, and the size of the clearance is between 0.01-0.02mm.
5. The intelligent electric knife gate valve according to claim 1, characterized in that: The sealing mechanism (7) includes a sliding plate (71), a sealing plate (72), an upper sealing ring (73), and a sliding plate (74). The sliding plate (71) is slidably installed on the outside of the outer sealing groove (52) of the valve body (5). The sealing plate (72) is slidably installed on the inside of the outer sealing groove (52) of the valve body (5). The bottom end of the sliding plate (71) is hinged to the upper end of the sliding plate (74). The sliding plate (71) is L-shaped. The upper sealing ring (73) is fixedly installed in the upper sealing groove (58) of the valve body (5). The upper sealing ring (73) has a C-shaped structure.
6. The intelligent electric knife gate valve according to claim 5, characterized in that: The upper end of the slide plate (71) is trapezoidal, and the lower end of the slide plate (71) is provided with a sliding hole (711) that is hinged to the slide plate (74). The cross-sectional area of the slide plate (71) is 0.35-0.55 times that of the outer sealing groove (52), and the ratio of the thickness of the slide plate (71) to the thickness of the outer sealing groove (52) of the valve body (5) is 2:
1.
7. The intelligent electric knife gate valve according to claim 5, characterized in that: The sealing sheet (72) is trapezoidal, and the cross-sectional area of the sealing sheet (72) is 0.4-0.6 times that of the outer sealing groove (52). The thickness of the outer sealing groove (52) is 1 / 2 of the thickness of the sealing sheet (72).
8. The intelligent electric knife gate valve according to claim 1, characterized in that: The information module (8) includes a main control chip (81), a power supply module (82), and a wireless module (83). The main control chip (81) is fixedly installed in the actuator (3) and uses a communication protocol to control the actuator (3). The wireless module (83) is fixedly installed in the actuator (3) and can automatically switch between different 5G frequency bands and modes according to the working environment and signal conditions of the knife gate valve. The power supply module (82) is fixedly installed in the actuator (3) and can automatically start or stop the energy recovery function according to the working requirements and power status of the knife gate valve.