Knife gate valve to prevent material sticking

Abstract

The utility model provides a prevent the knife plate valve of material, the upper end of bonnet is connected with support frame, the upper end of bonnet is connected with valve seat, and the closed cavity is formed between bonnet and valve seat, and the side of support frame is equipped with the gas holder, and the air inlet is equipped on the bonnet, and the gas holder communicates with the air inlet through the pipeline, and the second electric valve is equipped between the gas holder and the air inlet, the gas holder inputs the air pressure in the closed cavity of bonnet, and the slight positive pressure airflow in the cavity can block the material flowing to the cavity. The utility model inputs the air pressure in the closed cavity of bonnet and valve seat through the gas holder and makes the slight positive pressure in the cavity, and the slight positive pressure airflow is used to block the material flowing to the cavity, and the problem that the material is blocked because of the material entering the closed cavity of the knife plate valve is solved.

Description

Technical Field

[0001] This utility model relates to the field of blade valves, and in particular to a blade valve for preventing material jamming. Background Technology

[0002] During the use of knife plate valves, the sealed cavity formed between the valve cover and the valve seat is prone to material jamming, which affects the normal operation of the valve. Existing knife plate valves lack an effective anti-jamming structure design, making it difficult to reliably block material from entering the cavity. At the same time, some knife plate valves have insufficient sealing, which further aggravates the problems of material jamming and valve operation stability. Utility Model Content

[0003] The main purpose of this utility model is to provide a blade valve that prevents material jamming, and to solve the technical problem that material can easily enter the sealed cavity between the valve cover and the valve seat during the use of the blade valve, causing material jamming.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a blade valve to prevent material jamming, wherein the upper end of the valve cover is connected to the support frame, the upper end of the valve cover is connected to the valve seat, and the valve cover and the valve seat form a sealed cavity. An air storage tank is provided on one side of the support frame, an air inlet is provided on the valve cover, the air storage tank is connected to the air inlet through a pipe, and a second electric valve is provided between the air storage tank and the air inlet. The gas storage tank inputs air pressure into the sealed cavity of the valve cover, and the slightly positive pressure airflow in the cavity will block the material from flowing into the cavity.

[0005] In the preferred embodiment, the valve stem of the cylinder passes through the support frame and the upper part of the valve cover and connects to the top of the gate. A first sealing ring is provided at the connection between the support frame and the valve cover, and the valve stem is slidably connected to the first sealing ring.

[0006] In the preferred embodiment, the outer ring of the first sealing ring has a raised outer ring, which presses against the flange between the support frame and the valve cover.

[0007] In the preferred embodiment, a second electric valve is provided between the gas storage tank and the air inlet, and a first electric valve is provided on the air inlet pipe of the gas storage tank.

[0008] In the preferred embodiment, the gas storage tank is equipped with an electronic pressure gauge.

[0009] In the preferred embodiment, a pressure sensor is also provided on one side of the valve cover, and a pressure relief valve is also provided on the other side of the valve cover.

[0010] In the preferred embodiment, a controller is provided on one side of the gas storage tank, and the controller is electrically connected to the pressure sensor, the second electric valve, the electronic pressure gauge and the first electric valve.

[0011] In the preferred embodiment, the upper part of the valve seat is provided with an opening, and a second sealing ring is provided on the opening. The lower end of the gate passes through the second sealing ring and is slidably sealed to the second sealing ring.

[0012] In the preferred embodiment, the cross-section of the second sealing ring is an I-shaped structure, and the groove in the middle of the second sealing ring is engaged with the opening of the valve seat.

[0013] In the preferred embodiment, the inner ring of the valve seat is provided with a hard sealing ring, and the middle of the hard sealing ring is provided with a groove, and the lower end of the gate is locked in the groove.

[0014] This utility model provides a blade valve to prevent material jamming. The invention uses an air tank to input air pressure into the sealed cavity formed by the valve cover and valve seat, maintaining a slight positive pressure within the cavity. This slight positive pressure airflow prevents material from flowing into the cavity, solving the problem of material jamming caused by material entering the sealed cavity. The structural design of the first sealing ring enhances the sealing performance at the valve stem, while the I-beam structure of the second sealing ring and the groove design of the hard sealing ring improve the sealing and fit stability between the gate and the valve seat. Simultaneously, the controller, combined with a pressure sensor and electronic pressure gauge, achieves precise air pressure control, ensuring the reliability of the anti-jamming effect and the overall stability of the valve's operation. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a cross-sectional structural diagram showing the overall steps of this utility model; Figure 2 This is a cross-sectional view of the overall appearance of this utility model.

[0016] In the diagram: Cylinder 1; Valve stem 2; Support frame 3; Valve cover 4; First sealing ring 5; Pressure relief valve 6; Valve seat 7; Second sealing ring 8; Gate 9; Hard sealing ring 10; Inlet pipe 11; First electric valve 12; Electronic pressure gauge 13; Air tank 14; Controller 15; Second electric valve 16; Air inlet 17; Pressure sensor 18. Detailed Implementation

[0017] like Figure 1-2 As shown, a blade valve for preventing material jamming has a valve cover 4 connected to a support frame 3 at its upper end and a valve seat 7 at its upper end. The valve cover 4 and the valve seat 7 form a sealed cavity. An air storage tank 14 is provided on one side of the support frame 3. An air inlet 17 is provided on the valve cover 4. The air storage tank 14 is connected to the air inlet 17 through a pipe. A second electric valve 16 is provided between the air storage tank 14 and the air inlet 17. The gas storage tank 14 inputs air pressure into the sealed cavity of the valve cover 4. The slightly positive pressure airflow in the cavity will block the material from flowing into the cavity.

[0018] The upper end of the valve cover 4 is connected to the support frame 3 and the valve seat 7 respectively. A sealed cavity is formed between the valve cover 4 and the valve seat 7. An air storage tank 14 is arranged on one side of the support frame 3. The valve cover 4 is provided with an air inlet 17. The air storage tank 14 is connected to the air inlet 17 through a pipe, and a second electric valve 16 is installed between the two. Its core principle of preventing material jamming is that the air storage tank 14 inputs air pressure into the sealed cavity, and the micro positive pressure airflow formed in the cavity can block the material from flowing into the cavity.

[0019] Before putting the knife valve into use, check the sealing of the connection between the valve cover 4 and the valve seat 7 to ensure that the cavity formed by the two is sealed and leak-free; confirm that the gas tank 14 stores sufficient gas, and then, according to the usage requirements, control the opening of the second electric valve 16 to allow the gas in the gas tank 14 to enter the sealed cavity formed by the valve cover 4 and the valve seat 7 through the pipeline and the air inlet 17, so that the cavity is maintained in a slightly positive pressure state, and then the knife valve can be opened and operated normally. During operation, the gas input can be adjusted according to the actual situation through the second electric valve 16 to ensure that the slightly positive pressure state in the cavity is stable; when the knife valve is not used, close the second electric valve 16 to stop the gas tank 14 from supplying gas to the cavity.

[0020] The air source pressure is kept stable at 0.12-0.15MPa to ensure that the valve cover cavity is in a slightly positive pressure state.

[0021] In the preferred embodiment, the valve stem 2 of cylinder 1 passes through the support frame 3 and the upper part of the valve cover 4 and connects to the top of the gate 9. A first sealing ring 5 is provided at the connection between the support frame 3 and the valve cover 4, and the valve stem 2 is slidably connected to the first sealing ring 5. The outer ring of the first sealing ring 5 has a raised outer ring, which presses between the flanges between the support frame 3 and the valve cover 4.

[0022] The valve stem 2 of cylinder 1 passes through the support frame 3 and the upper part of valve cover 4 in sequence, and connects to the top of gate 9 to transmit driving force. A first sealing ring 5 is provided at the connection between support frame 3 and valve cover 4, and valve stem 2 and first sealing ring 5 adopt a sealing sliding fit. The outer ring of the first sealing ring 5 has a raised outer ring. During installation, the raised outer ring is pressed between the flange between the support frame 3 and the valve cover 4 to enhance the sealing and positioning effect.

[0023] During installation, first place the first sealing ring 5 between the connecting flange of the support frame 3 and the valve cover 4. If it is the preferred option, align the raised outer ring with the flange gap, and then fit and tighten the support frame 3 and the flange of the valve cover 4 so that the flange presses the first sealing ring 5. Then the valve stem 2 of cylinder 1 is passed through the support frame 3, the first sealing ring 5 and the upper part of the valve cover 4, and fixedly connected to the top of the gate 9; When in use, start cylinder 1. Cylinder 1 drives valve stem 2 to slide along the first sealing ring 5. Valve stem 2 drives gate 9 to open and close the valve. During operation, periodically check the sealing status of the first sealing ring 5 and the tightness of the flange.

[0024] Cylinder 1 is directly connected to gate 9 via valve stem 2, ensuring direct and efficient transmission of driving force and precise and smooth opening and closing of gate 9. The first sealing ring 5 seals the sliding part of valve stem 2, preventing external impurities from entering or internal gas from leaking, thus ensuring the operational stability of the valve's internal components. In the preferred embodiment, the raised outer ring of the first sealing ring 5 is pressed between the flanges, which not only enhances the tightness of the seal ring and the flange, improving the sealing effect, but also ensures the reliable positioning of the first sealing ring 5, preventing the seal ring from shifting during valve operation and causing seal failure, extending the service life of the sealing components, and reducing maintenance costs.

[0025] In the preferred embodiment, a second electric valve 16 is provided between the gas storage tank 14 and the air inlet 17, and a first electric valve 12 is provided on the air inlet pipe 11 of the gas storage tank 14. An electronic pressure gauge 13 is provided on the gas storage tank 14. A pressure sensor 18 is also provided on one side of the valve cover 4, and a pressure relief valve 6 is also provided on the other side of the valve cover 4.

[0026] A controller 15 is provided on one side of the gas storage tank 14. The controller 15 is electrically connected to the pressure sensor 18, the second electric valve 16, the electronic pressure gauge 13 and the first electric valve 12.

[0027] A second electric valve 16 is installed between the gas storage tank 14 and the air inlet 17 of the valve cover 4. A first electric valve 12 is installed on the air inlet pipe 11 of the gas storage tank 14. The gas storage tank 14 is equipped with an electronic pressure gauge 13 to monitor the gas pressure inside the tank. A pressure sensor 18 is installed on one side of the valve cover 4 to monitor the cavity pressure, and a pressure relief valve 6 is installed on the other side for overpressure protection. A controller 15 is installed on one side of the gas storage tank 14, and the controller 15 is electrically connected to the pressure sensor 18, the second electric valve 16, the electronic pressure gauge 13 and the first electric valve 12 respectively, forming a closed loop of gas pressure monitoring and intelligent control.

[0028] Before the valve is activated, the first electric valve 12 is opened by the controller 15. The external air source fills the air tank 14 through the air inlet pipe 11. The staff observes the air pressure in the tank through the electronic pressure gauge 13. When the preset value is reached, the first electric valve 12 is closed by the controller 15 to stop filling. Then, the second electric valve 16 is opened by the controller 15. The gas in the gas tank 14 enters the valve cover 4 cavity through the pipeline and the air inlet 17. The pressure sensor 18 monitors the cavity pressure in real time and transmits the data to the controller 15. The controller 15 adjusts the opening of the second electric valve 16 according to the preset pressure value to maintain a slight positive pressure in the cavity. If the pressure sensor 18 detects that the chamber pressure exceeds the safe value, the pressure relief valve 6 will automatically open to relieve pressure and will automatically close after the pressure is restored. During operation, the electronic pressure gauge 13 provides real-time feedback on the pressure of the gas storage tank 14. When the pressure is below the threshold, the controller 15 automatically opens the first electric valve 12 to replenish the gas, and automatically closes it after replenishment is completed. After the valve is deactivated, the second electric valve 16 can be closed by the controller 15.

[0029] Controller 15 can be a PLC controller, specifically the Siemens S7-1200 series, which can meet the needs of multi-device linkage control and data acquisition.

[0030] In the preferred embodiment, the valve seat 7 has an opening at the top, and a second sealing ring 8 is provided on the opening. The lower end of the gate 9 passes through the second sealing ring 8 and is slidably sealed to the second sealing ring 8.

[0031] The second sealing ring 8 has an I-shaped cross-section, and the groove in the middle of the second sealing ring 8 is engaged with the opening of the valve seat 7.

[0032] An opening is made on the upper part of the valve seat 7, and a second sealing ring 8 is installed at the opening. The lower end of the gate 9 passes through the second sealing ring 8, and the two form a sliding sealing fit. The second sealing ring 8 adopts an I-shaped cross-section design, and the groove in its middle engages with the opening of the valve seat 7 to achieve the positioning and installation of the sealing ring.

[0033] Instructions for use: During installation, first align the groove in the middle of the second sealing ring 8 with the opening at the top of the valve seat 7, and snap the second sealing ring 8 into the opening, ensuring a secure and loose fit; then align the lower end of the gate plate 9 with the inner hole of the second sealing ring 8 and pass it through, so that the gate plate 9 and the second sealing ring 8 form a tight sliding fit; when the knife valve is running, the gate plate 9 can slide back and forth along the second sealing ring 8 to open and close the valve. Regularly check the snap-fit ​​status of the second sealing ring 8 and the wear of the sealing surface. Replace it promptly if it becomes loose or the seal fails.

[0034] The sliding seal between the gate 9 and the second sealing ring 8 ensures smooth opening and closing of the gate 9 and effectively prevents material from entering the valve cavity through the gap between the gate 9 and the valve seat 7, thus improving the anti-jamming effect and reducing wear on the internal valve components. The second sealing ring 8 adopts an I-shaped cross-section design with a central groove that engages with the opening of the valve seat 7, ensuring precise and secure installation and preventing displacement of the sealing ring during the sliding of the gate 9, which could lead to sealing failure and improve sealing stability. This structure is easy to assemble, requires no complex fixing parts, reduces installation and maintenance difficulty, and the I-shaped sealing ring experiences more uniform stress, extending the service life of the sealing components.

[0035] In the preferred embodiment, the inner ring of the valve seat 7 is provided with a hard sealing ring 10, and the hard sealing ring 10 has a groove in the middle, into which the lower end of the gate 9 is engaged. This embodiment is the sealing and positioning structure of the knife valve. The core design is as follows: the inner ring of the valve seat 7 is provided with a hard sealing ring 10, and the middle of the hard sealing ring 10 is machined with a groove. The lower end of the gate 9 is engaged in the groove, forming a hard sealing fit and positioning constraint.

[0036] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A cutter plate valve for preventing material jamming, characterized in that: The upper end of the valve cover (4) is connected to the support frame (3), and the upper end of the valve cover (4) is connected to the valve seat (7). The valve cover (4) and the valve seat (7) form a sealed cavity. A gas storage tank (14) is provided on one side of the support frame (3). An air inlet (17) is provided on the valve cover (4). The gas storage tank (14) is connected to the air inlet (17) through a pipe. A second electric valve (16) is provided between the gas storage tank (14) and the air inlet (17). The gas storage tank (14) inputs air pressure into the sealed cavity of the valve cover (4), and the slightly positive pressure airflow in the cavity will block the material from flowing into the cavity.

2. The blade valve for preventing material jamming according to claim 1, characterized in that: The valve stem (2) of the cylinder (1) passes through the support frame (3) and the upper part of the valve cover (4) and connects to the top of the gate (9). A first sealing ring (5) is provided at the connection between the support frame (3) and the valve cover (4). The valve stem (2) and the first sealing ring (5) are in a sealed sliding connection.

3. The blade valve for preventing material jamming according to claim 2, characterized in that: The outer ring of the first sealing ring (5) is provided with a raised outer ring, which presses between the flange between the support frame (3) and the valve cover (4).

4. The blade valve for preventing material jamming according to claim 1, characterized in that: A second electric valve (16) is provided between the gas storage tank (14) and the air inlet (17), and a first electric valve (12) is provided on the air inlet pipe (11) of the gas storage tank (14).

5. The blade valve for preventing material jamming according to claim 4, characterized in that: An electronic pressure gauge (13) is installed on the gas storage tank (14).

6. The blade valve for preventing material jamming according to claim 5, characterized in that: A pressure sensor (18) is also provided on one side of the valve cover (4), and a pressure relief valve (6) is also provided on the other side of the valve cover (4).

7. The blade valve for preventing material jamming according to claim 6, characterized in that: A controller (15) is provided on one side of the gas storage tank (14). The controller (15) is electrically connected to the pressure sensor (18), the second electric valve (16), the electronic pressure gauge (13), and the first electric valve (12).

8. The blade valve for preventing material jamming according to claim 1, characterized in that: The valve seat (7) has an opening at the top, and a second sealing ring (8) is provided on the opening. The lower end of the gate (9) passes through the second sealing ring (8) and is slidably sealed to the second sealing ring (8).

9. The blade valve for preventing material jamming according to claim 1, characterized in that: The second sealing ring (8) has an I-shaped cross-section, and the groove in the middle of the second sealing ring (8) is stuck on the opening of the valve seat (7).

10. The blade valve for preventing material jamming according to claim 1, characterized in that: The valve seat (7) has a hard sealing ring (10) in the inner ring, and a groove is provided in the middle of the hard sealing ring (10). The lower end of the gate (9) is stuck in the groove.

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