A tail gas vent valve for carbon black production

Abstract

The present application discloses a tail gas vent valve for carbon black production, which relates to the technical field of vent valves. The valve valve comprises a valve seat, a valve body, a valve core, a valve stem, a drive assembly, a first protection assembly, and a second protection assembly. The valve seat is provided with an inclined first annular sealing surface, the valve core is provided with an inclined second annular sealing surface, the drive cylinder is connected to the valve stem and is used to drive the valve stem to slide, the first protection assembly comprises a plurality of protection blocks, and the second protection assembly comprises a plurality of protection covers. When the second annular sealing surface of the valve core abuts the first annular sealing surface of the valve seat, the tail gas vent valve for carbon black production is closed. When the second annular sealing surface is disengaged from the first annular sealing surface, the tail gas vent valve for carbon black production is opened. When the tail gas vent valve is opened, the plurality of protection blocks cover the outside of the first annular sealing surface, and the plurality of protection covers cover the outside of the second annular sealing surface. The tail gas vent valve for carbon black production described in the present application has the effect of improving sealing performance.

Description

Technical Field

[0001] The present application relates to the technical field of vent valves, and in particular to an exhaust vent valve for carbon black production. Background Art

[0002] The tail gas vent valve for carbon black production is a key device in the carbon black production process. It is connected to the main bag filter for carbon black production and is mainly used to adjust the pressure inside the main bag filter. When the pressure inside the main bag filter exceeds its upper limit, the tail gas vent valve for carbon black production opens to vent the tail gas to maintain a constant pressure in the main bag filter.

[0003] Exhaust gas venting devices used in carbon black production in the prior art are mostly cap-type structures, which use a swing-opening method to control the opening and closing of the cap to achieve the exhaust gas venting function; however, the swing-opening cap-type structure has extremely high requirements for the on-site environment. If welding deformation or foreign matter is retained, it will lead to a loose seal and exhaust gas leakage. Summary of the Invention

[0004] To this end, the technical problem to be solved by this application is to improve the problem of exhaust gas leakage caused by the cap-type structure of the exhaust gas venting device for carbon black production in the existing technology that is not tightly sealed.

[0005] To solve the above technical problems, the present application provides a tail gas vent valve for carbon black production, comprising:

[0006] A valve seat, wherein both ends of the valve seat are open, one end of which is an exhaust gas inlet end, and the exhaust gas inlet end is connected to the main bag filter, and an inclined first annular sealing surface is provided in the valve seat;

[0007] The valve body is provided with three open ends, wherein the bottom end is connected to the valve seat, the top end is covered with a valve cover, and the side end is the exhaust gas outlet end;

[0008] A valve core is disposed in the valve body and is provided with an inclined second annular sealing surface, the second annular sealing surface being arranged in cooperation with the first annular sealing surface;

[0009] a valve stem, the valve stem being connected to the valve core and slidably disposed on the valve body, with one end of the valve stem extending out of the valve body;

[0010] A drive assembly, the drive assembly comprising a drive cylinder, the drive cylinder being connected to the valve stem and configured to drive the valve stem to slide;

[0011] a first protection assembly, the first protection assembly comprising a plurality of protection blocks and a plurality of first driving parts, the protection blocks being slidably connected to the valve seat, the protection blocks being provided with a protection surface, the protection surface being arranged in cooperation with the first annular sealing surface, the plurality of protection blocks being able to be slidably combined into a complete annular shape and covering the outer side of the first annular sealing surface; the first driving part being connected to the protection blocks, and being used to drive the protection blocks to slide;

[0012] a second protection assembly, the second protection assembly comprising a plurality of protection covers and a plurality of second driving parts, the protection covers being connected to the valve core, the plurality of protection covers being able to be movably assembled into a complete annular shape and being arranged on the outside of the second annular sealing surface; the second driving part being connected to the protection covers, and being used to drive the protection covers to move;

[0013] In which, the driving cylinder drives the valve stem to slide, and when the second annular sealing surface of the valve core abuts the first annular sealing surface of the valve seat, the passage from the exhaust gas inlet end to the exhaust gas outlet end is closed; when the second annular sealing surface of the valve core is disengaged from the first annular sealing surface of the valve seat, the passage from the exhaust gas inlet end to the exhaust gas outlet end is opened, and multiple protective blocks are covered on the outside of the first annular sealing surface, and multiple protective covers are arranged on the outside of the second annular sealing surface.

[0014] Preferably, the first driving unit includes:

[0015] a base plate, the base plate being fixedly connected to the valve seat;

[0016] a first spring, one end of the first spring being connected to the substrate, the other end of the first spring being connected to the protection block, and the first spring being used to drive the protection block away from the substrate;

[0017] A control rope, one end of which is connected to the protection block, and the control rope is used to pull the protection block to move.

[0018] Preferably, the first driving unit further includes:

[0019] A guide rod, the guide rod being connected to the valve body, the control rope being wound around the guide rod, the pulling direction of the control rope after winding around the guide rod being opposite to that before winding, and the pulling direction of the control rope being parallel to the moving direction of the valve stem;

[0020] a pulling plate connected to one end of the control rope;

[0021] a fixing plate connected to the valve body;

[0022] a second spring, one end of the second spring being connected to the pulling plate, the other end of the second spring being connected to the fixed plate, the second spring being used to drive the pulling plate away from the fixed plate; and the elastic coefficient of the second spring being greater than the elastic coefficient of the first spring;

[0023] A control rod is fixedly connected to the valve stem, and the control rod can push the pulling plate to approach the fixed plate.

[0024] Preferably, the second driving unit includes:

[0025] A control telescopic rod, one end of which is connected to the protective cover;

[0026] A slider is connected to the other end of the control telescopic rod, the valve stem is provided with a slide groove along its length, and the slider is embedded in the slide groove for sliding connection;

[0027] a third spring, one end of the third spring being connected to the slider, the other end of the third spring being connected to the protective cover, the third spring being sleeved outside the control telescopic rod, and the third spring being used to drive the protective cover away from the valve stem;

[0028] A pushing block, the pushing block is fixedly connected to the inner side wall of the valve body, the pushing block is provided with an inclined pushing guide surface, and the protective cover is matched with a pushed guide surface;

[0029] A limit plate is fixedly connected to the bottom of the valve body and is used to abut and limit the bottom end of the protective cover.

[0030] Preferably, the driving assembly further includes a connecting portion, and the connecting portion includes:

[0031] a bracket tube, one end of which is fixedly connected to the valve cover, and the other end of which is connected to the fixed end of the drive cylinder;

[0032] A connecting sleeve is arranged in the bracket tube, and one end of the connecting sleeve is connected to the valve stem, and the other end of the connecting sleeve is connected to the movable end of the driving cylinder.

[0033] Preferably, the inner cavities at both ends of the connecting sleeve are respectively provided with left-handed threads and right-handed threads, the movable ends of the valve stem and the drive cylinder are respectively threadedly connected to the connecting sleeve, and the connecting part also includes a left-handed nut and a right-handed nut, and the left-handed nut and the right-handed nut are respectively locked at both ends of the connecting sleeve.

[0034] Preferably, a feedback component is further included, and the feedback component includes:

[0035] a base connected to a fixed end of the drive cylinder;

[0036] a connecting rod connected to a movable end of the driving cylinder;

[0037] a slide plate, one end of which is connected to the connecting rod, and the slide plate is slidably arranged on the base, and an inclined guide groove is provided on the slide plate;

[0038] A feedback rod, the feedback rod being inserted into the guide groove;

[0039] a rotating plate, one end of which is connected to the feedback rod;

[0040] A locator is fixedly mounted on the base, and the other end of the rotating plate is connected to the positioning shaft on the locator, and the locator can obtain rotation information of the positioning shaft.

[0041] Preferably, an arc-shaped sealing head is provided on the side of the valve core facing the valve seat.

[0042] Preferably, a flange is provided at the exhaust gas inlet end of the valve seat.

[0043] In summary, this application includes at least one of the following beneficial technical effects:

[0044] The exhaust gas vent valve for carbon black production described in the present application is provided with a valve seat, a valve body, a valve core, a valve stem and a drive cylinder, so that the opening and closing of the exhaust gas vent valve for carbon black production is controlled by the linear movement of the drive cylinder, thereby reducing the control difficulty and improving the control accuracy; by providing an inclined first annular sealing surface and an adaptive inclined second annular sealing surface, the self-alignment function of the valve core and the valve seat is realized, and the sealing reliability is improved; by providing a first protection component and a second protection component, when the exhaust gas vent valve is opened, multiple protection blocks cover the outside of the first annular sealing surface, and multiple protection covers are provided on the outside of the second annular sealing surface to play a protective role, thereby reducing the impact of continuous erosion of exhaust gas on the sealing mating surface, and further ensuring the sealing performance; when the exhaust gas vent valve is closed, the protection block and the first annular sealing surface are disengaged, and the protection cover also releases the protection of the second annular sealing surface, so that the valve core can be smoothly pressed and sealed on the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to make the content of this application easier to understand, the following is a further detailed description of this application based on specific embodiments of the application and in conjunction with the accompanying drawings, wherein:

[0046] Figure 1 This is a schematic structural diagram of a tail gas vent valve for carbon black production in a preferred embodiment of the present application;

[0047] Figure 2is a cross-sectional view of an embodiment of the present application;

[0048] Figure 3 It is a schematic diagram of the structure of the protection block in this application;

[0049] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0050] Figure 5 It is a structural diagram of the first driving unit in this application;

[0051] Figure 6 It is a structural diagram of the second protection component in this application;

[0052] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0053] Figure 8 yes Figure 2 Enlarged view of point C in the middle;

[0054] Figure 9 It is a structural diagram of the feedback component in this application.

[0055] Explanation of the reference numerals in the specification: 1. valve seat; 11. exhaust gas inlet; 12. first annular sealing surface; 13. flange; 2. valve body; 21. exhaust gas outlet; 22. valve cover; 3. valve core; 31. second annular sealing surface; 32. arc-shaped head; 4. valve stem; 41. slideway; 5. drive assembly; 51. drive cylinder; 52. connecting portion; 521. bracket cylinder; 522. connecting sleeve; 523. left-hand nut; 524. right-hand nut; 6. first protection assembly; 61. protection block; 611. protection surface; 62. first drive portion; 621. Base plate; 622. First spring; 623. Control rope; 624. Guide rod; 625. Pull plate; 626. Fixed plate; 627. Second spring; 628. Control rod; 7. Second protective assembly; 71. Protective cover; 72. Second driving unit; 721. Control telescopic rod; 722. Slider; 723. Third spring; 724. Push block; 725. Limit plate; 8. Feedback assembly; 81. Base; 82. Connecting rod; 83. Slide plate; 831. Guide groove; 84. Feedback rod; 85. Rotating plate; 86. Positioner. DETAILED DESCRIPTION

[0056] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present application and implement it, but the embodiments are not intended to limit the present application.

[0057] Reference Figures 1 to 9 As shown, the present application discloses a tail gas vent valve for carbon black production, comprising:

[0058] The valve seat 1 has two open ends, one of which is an exhaust gas inlet end 11, which is connected to the main bag filter. An inclined first annular sealing surface 12 is provided in the valve seat 1;

[0059] The valve body 2 is provided with three open ends, wherein the bottom end is connected to the valve seat 1, the top end is covered with a valve cover 22, and the side end is the exhaust gas outlet end 21;

[0060] The valve core 3 is arranged in the valve body 2, and an inclined second annular sealing surface 31 is provided on the valve core 3, and the second annular sealing surface 31 is provided in cooperation with the first annular sealing surface 12;

[0061] The valve stem 4 is connected to the valve core 3 and is slidably provided on the valve body 2, with one end of the valve stem 4 extending out of the valve body 2;

[0062] The driving assembly 5 includes a driving cylinder 51, which is connected to the valve stem 4 and is used to drive the valve stem 4 to slide;

[0063] The first protection assembly 6 includes a plurality of protection blocks 61 and a plurality of first driving parts 62. The protection blocks 61 are slidably connected to the valve seat 1. The protection blocks 61 are provided with a protection surface 611. The protection surface 611 is provided in cooperation with the first annular sealing surface 12. The plurality of protection blocks 61 can be slidably combined into a complete ring and cover the outer side of the first annular sealing surface 12. The first driving part 62 is connected to the protection block 61 and is used to drive the protection block 61 to slide.

[0064] The second protection assembly 7 includes a plurality of protection covers 71 and a plurality of second driving parts 72. The protection covers 71 are connected to the valve core 3. The plurality of protection covers 71 can be moved and combined into a complete ring and are arranged outside the second annular sealing surface 31. The second driving part 72 is connected to the protection cover 71 and is used to drive the protection cover 71 to move.

[0065] Among them, the driving cylinder 51 drives the valve stem 4 to slide, and when the second annular sealing surface 31 of the valve core 3 abuts the first annular sealing surface 12 of the valve seat 1, the passage from the exhaust gas inlet end 11 to the exhaust gas outlet end 21 is closed; when the second annular sealing surface 31 of the valve core 3 is disengaged from the first annular sealing surface 12 of the valve seat 1, the passage from the exhaust gas inlet end 11 to the exhaust gas outlet end 21 is opened, and multiple protective blocks 61 cover the outside of the first annular sealing surface 12, and multiple protective covers 71 are arranged on the outside of the second annular sealing surface 31.

[0066] When the exhaust gas vent valve for carbon black production is in use, when the main bag filter does not need to vent the exhaust gas, the movable end of the drive cylinder 51 extends and pushes the valve core 3 to press against the valve seat 1 through the valve stem 4, and the first annular sealing surface 12 and the second annular sealing surface 31 are fitted and sealed, thereby closing the passage from the exhaust gas inlet end 11 to the exhaust gas outlet end 21, and the first drive part 62 drives the protective surface 611 on the protective block 61 to disengage from the first annular sealing surface 12, and the second drive part 72 drives the protective cover 71 to release the cover protection of the second annular sealing surface 31; when the main bag filter needs to vent the exhaust gas, the drive cylinder 51 is The movable end retracts and pulls the valve core 3 through the valve stem 4 to separate the valve core 3 and the valve seat 1, thereby opening the passage from the exhaust gas inlet end 11 to the exhaust gas outlet end 21, so that the exhaust gas can be discharged and emptied smoothly. After the sealing surfaces of the valve seat 1 and the valve core 3 are separated, the first drive part 62 drives the protection block 61 to slide, and makes the protection surface 611 cover and abut against the first annular sealing surface 12. The second drive part 72 drives the protection cover 71 to move, and makes the protection cover 71 cover the outside of the second annular sealing surface 31, so that when a large amount of exhaust gas flows through, the first annular sealing surface 12 and the second annular sealing surface 31 are protected.

[0067] The exhaust gas vent valve for carbon black production is provided with a valve seat 1, a valve body 2, a valve core 3, a valve stem 4 and a driving cylinder 51, so that the opening and closing of the exhaust gas vent valve for carbon black production is controlled by the linear movement of the driving cylinder 51, thereby reducing the control difficulty and improving the control accuracy; by providing an inclined first annular sealing surface 12 and an adaptive inclined second annular sealing surface 31, a self-aligning function of the valve core 3 and the valve seat 1 is realized, thereby improving the sealing reliability; by providing a first protection component 6 and a second protection component 7, when the exhaust gas vent valve is opened, a plurality of protection blocks 61 cover the outside of the first annular sealing surface 12, and a plurality of protection covers 71 are provided on the outside of the second annular sealing surface 31 to play a protective role, thereby reducing the influence of continuous scouring of exhaust gas on the sealing mating surface and further ensuring the sealing performance; when the exhaust gas vent valve is closed, the protection block 61 and the first annular sealing surface 12 are disengaged, and the protection cover 71 also releases the protection of the second annular sealing surface 31, thereby allowing the valve core 3 to be smoothly pressed against and sealed on the valve seat 1.

[0068] In this embodiment, specifically, the inclination angles of the first annular sealing surface 12 and the second annular sealing surface 31 can be set to 60°, and the protection surface 611 on the protection block 61 is also correspondingly set to have an inclination angle of 60°.

[0069] Reference Figure 3 and Figure 4 As shown, in this embodiment, preferably, the first driving unit 62 includes:

[0070] Base plate 621, base plate 621 is fixedly connected to valve seat 1;

[0071] A first spring 622 , one end of which is connected to the base plate 621 , and the other end of which is connected to the protection block 61 . The first spring 622 is used to drive the protection block 61 away from the base plate 621 ;

[0072] A control rope 623 , one end of which is connected to the protection block 61 , and the control rope 623 is used to pull the protection block 61 to move.

[0073] When the exhaust gas vent valve for carbon black production is opened, under the elastic force of the first spring 622, the first spring 622 drives the protection block 61 away from the substrate 621 and moves to the position of the first annular sealing surface 12, so that the protection surface 611 covers and abuts against the outside of the first annular sealing surface 12; when the exhaust gas vent valve for carbon black production needs to be closed, the control rope 623 is tightened to overcome the elastic force of the first spring 622, so that the protection block 61 is close to the substrate 621 and disengaged from the first annular sealing surface 12, so that after the valve core 3 moves downward, the second annular sealing surface 31 can be sealed with the first annular sealing surface 12.

[0074] Reference Figure 5 As shown, in this embodiment, preferably, the first driving unit 62 further includes:

[0075] The guide rod 624 is connected to the valve body 2. The control rope 623 is wound around the guide rod 624. The pulling direction of the control rope 623 after winding around the guide rod 624 is opposite to that before winding. The pulling direction of the control rope 623 is parallel to the moving direction of the valve stem 4.

[0076] a pulling plate 625 connected to one end of the control rope 623;

[0077] A fixing plate 626 connected to the valve body 2;

[0078] A second spring 627, one end of which is connected to the pulling plate 625, and the other end of which is connected to the fixed plate 626. The second spring 627 is used to drive the pulling plate 625 away from the fixed plate 626; and the elastic coefficient of the second spring 627 is greater than the elastic coefficient of the first spring 622;

[0079] The control rod 628 is fixedly connected to the valve stem 4 , and the control rod 628 can push the pulling plate 625 to approach the fixed plate 626 .

[0080] By setting the control rod 628 and the pulling plate 625, when the exhaust gas vent valve for carbon black production is closed, the pulling plate 625 is located at a position away from the fixed plate 626. Under the elastic force of the second spring 627, the control rope 623 is tightened, the first spring 622 is compressed, and the protection block 61 is located close to the base plate 621; when the exhaust gas vent valve for carbon black production needs to be opened, the driving cylinder 51 drives the valve stem 4 to move and causes the valve core 3 and the valve seat 1 to disengage. At this time, the control rod 628 moves with the valve stem 4. When the valve stem 4 moves up a certain distance, the control rod 628 abuts against the pulling plate 625. As the valve stem 4 continues to move up, the control rod 628 pushes the pulling plate 625 close to the fixed plate 626, the second spring 627 is compressed, the control rope 623 loosens, and under the elastic force of the first spring 622, the protection block 61 slides away from the base plate 621 until the protection surface 611 covers and abuts on the first annular sealing surface 12 and plays a protective role.

[0081] Reference Figure 6 and Figure 7 As shown, in this embodiment, preferably, the second driving unit 72 includes:

[0082] Control the telescopic rod 721, one end of which is connected to the protective cover 71;

[0083] Slider 722, which is connected to the other end of the control telescopic rod 721. The valve stem 4 has a sliding groove 41 along its length, and the slider 722 is embedded in the sliding groove 41 for sliding connection;

[0084] A third spring 723 , one end of which is connected to the slider 722 , and the other end of which is connected to the protective cover 71 . The third spring 723 is sleeved outside the control telescopic rod 721 , and is used to drive the protective cover 71 away from the valve stem 4 ;

[0085] The pushing block 724 is fixedly connected to the inner wall of the valve body 2. The pushing block 724 is provided with an inclined pushing guide surface, and the protective cover 71 is provided with a push guide surface;

[0086] The limiting plate 725 is fixedly connected to the bottom of the valve body 2 and is used to abut and limit the bottom end of the protective cover 71 .

[0087] By setting the control telescopic rod 721 and the third spring 723, when the exhaust gas vent valve for carbon black production is closed, the third spring 723 drives the protective cover 71 away from the valve stem 4. At this time, the control telescopic rod 721 is extended, the slider 722 is located in the middle position of the slide groove 41, the bottom end of the protective cover 71 abuts against the limit plate 725, and the second annular sealing surface 31 of the valve core 3 can fit and seal with the first annular sealing surface 12 of the valve seat 1.

[0088] When the tail gas vent valve for carbon black production needs to be opened, the valve stem 4 drives the valve core 3 to move upward. When the valve stem 4 initially moves upward, the slider 722 does not move until the slide groove 41 moves upward so that the slider 722 is located at the bottom of the slide groove 41. The slider 722 moves upward along with the valve stem 4. At this time, the telescopic rod 721 and the protective cover 71 are controlled to move upward along with the slider 722. After moving up a certain distance until the vent valve is fully opened, the pushed guide surface of the protective cover 71 contacts the pushed guide surface of the pushing block 724. Then, under the action of the pushing block 724, the protective cover 71 is forced to move toward the valve stem 4, and the telescopic rod 721 is controlled to retract until the protective cover 71 is located on the outside of the second annular sealing surface 31.

[0089] When the exhaust gas vent valve for carbon black production needs to be closed, the valve stem 4 drives the valve core 3 to move downward. When the push block 724 and the protective cover 71 are out of contact, the protective cover 71 is reset under the elastic force of the third spring 723; then the protective cover 71 continues to move downward with the valve core 3 under the action of its own weight until the bottom end of the protective cover 71 abuts against the limit plate 725, and the protective cover 71 stops moving downward; then the valve core 3 continues to move downward until the second annular sealing surface 31 moves out of the range of the protective cover 71 and seals on the first annular sealing surface 12, completing the closure of the exhaust gas vent valve for carbon black production.

[0090] Reference Figure 2 and Figure 8 As shown, in this embodiment, preferably, the driving assembly 5 further includes a connecting portion 52, and the connecting portion 52 includes:

[0091] A bracket tube 521, one end of which is fixedly connected to the valve cover 22, and the other end of which is connected to the fixed end of the driving cylinder 51;

[0092] The connecting sleeve 522 is arranged in the bracket tube 521, and one end of the connecting sleeve 522 is connected to the valve stem 4, and the other end of the connecting sleeve 522 is connected to the movable end of the driving cylinder 51.

[0093] In this embodiment, preferably, the inner cavities at both ends of the connecting sleeve 522 are respectively provided with left-handed threads and right-handed threads, and the movable ends of the valve stem 4 and the drive cylinder 51 are respectively threadedly connected to the connecting sleeve 522. The connecting part 52 also includes a left-handed nut 523 and a right-handed nut 524, and the left-handed nut 523 and the right-handed nut 524 are respectively locked at the two ends of the connecting sleeve 522.

[0094] Specifically, the upper end of the connecting sleeve 522 has a left-handed threaded cavity. The movable end of the drive cylinder 51 is threadedly connected to the upper end of the connecting sleeve 522. The left-handed nut 523 is threadedly connected to the drive cylinder 51 and screwed and locked to the upper end of the connecting sleeve 522. The lower end of the connecting sleeve 522 has a right-handed threaded cavity. One end of the valve stem 4 is threadedly connected to the lower end of the connecting sleeve 522. The right-handed nut 524 is threadedly connected to the valve stem 4 and screwed and locked to the lower end of the connecting sleeve 522. The provision of the support tube 521 and the connecting sleeve 522 improves the connection stability and reliability of the drive cylinder 51 driving the valve stem 4 to move.

[0095] Reference Figure 9 As shown, in this embodiment, preferably, the tail gas vent valve for carbon black production further includes a feedback component 8, and the feedback component 8 includes:

[0096] A base 81 connected to a fixed end of the drive cylinder 51;

[0097] a connecting rod 82 connected to the movable end of the driving cylinder 51;

[0098] A slide plate 83, one end of which is connected to the connecting rod 82, and the slide plate 83 is slidably provided on the base 81, and an inclined guide groove 831 is provided on the slide plate 83;

[0099] Feedback rod 84, feedback rod 84 is arranged in the guide groove 831;

[0100] A rotating plate 85 , one end of which is connected to the feedback rod 84 ;

[0101] The locator 86 is fixedly mounted on the base 81 , and the other end of the rotating plate 85 is connected to the positioning shaft on the locator 86 . The locator 86 can obtain the rotation information of the positioning shaft.

[0102] By setting the feedback component 8, when the driving cylinder 51 drives the valve stem 4 to move, the connecting rod 82 and the slide 83 follow the movable end of the driving cylinder 51 to move. Under the action of the guide groove 831, the feedback rod 84 drives the positioning shaft to rotate through the connection of the rotating plate 85, so that the positioner 86 obtains and feeds back the opening and closing status of the exhaust gas vent valve for carbon black production through the rotation information of the positioning shaft.

[0103] In this embodiment, preferably, a curved sealing head 32 is provided on the side of the valve core 3 facing the valve seat 1 .

[0104] By arranging the arc-shaped sealing head 32 on the valve core 3, the flow rate can be regulated to a certain extent, thereby facilitating the control of the exhaust emission.

[0105] Reference Figure 1 and Figure 2As shown, in this embodiment, preferably, the exhaust gas inlet end 11 of the valve seat 1 is provided with a flange 13 .

[0106] By arranging the flange 13 at the end of the valve seat 1, the connection between the flange 13 and the main bag filter is achieved by flange installation, which reduces the difficulty of on-site installation.

[0107] The implementation principle of the embodiment of the present application is: when the exhaust gas vent valve for carbon black production is in use, the valve seat 1, valve body 2, valve core 3, valve stem 4 and drive cylinder 51 are set, so that the opening and closing of the exhaust gas vent valve for carbon black production is controlled by the linear movement of the drive cylinder 51, reducing the control difficulty and improving the control accuracy and sealing reliability; when the exhaust gas vent valve for carbon black production is opened, multiple protection blocks 61 cover the outside of the first annular sealing surface 12, and multiple protection covers 71 are set on the outside of the second annular sealing surface 31 to play a protective role; when the exhaust gas vent valve for carbon black production is closed, the protection block 61 and the first annular sealing surface 12 are disengaged, and the protection cover 71 also releases the protection of the second annular sealing surface 31, so that the valve core 3 can be smoothly pressed and sealed on the valve seat 1; the feedback component 8 obtains the extension state of the drive cylinder 51 in real time, thereby feeding back the opening and closing state of the exhaust gas vent valve for carbon black production.

[0108] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A tail gas vent valve for carbon black production, characterized in that: include: A valve seat, wherein both ends of the valve seat are open, one end of which is an exhaust gas inlet end, and the exhaust gas inlet end is connected to the main bag filter, and an inclined first annular sealing surface is provided in the valve seat; The valve body is provided with three open ends, wherein the bottom end is connected to the valve seat, the top end is covered with a valve cover, and the side end is the exhaust gas outlet end; A valve core is disposed in the valve body and is provided with an inclined second annular sealing surface, the second annular sealing surface being arranged in cooperation with the first annular sealing surface; a valve stem, the valve stem being connected to the valve core and slidably disposed on the valve body, with one end of the valve stem extending out of the valve body; A drive assembly, the drive assembly comprising a drive cylinder, the drive cylinder being connected to the valve stem and configured to drive the valve stem to slide; a first protection assembly, the first protection assembly comprising a plurality of protection blocks and a plurality of first driving parts, the protection blocks being slidably connected to the valve seat, the protection blocks being provided with a protection surface, the protection surface being arranged in cooperation with the first annular sealing surface, the plurality of protection blocks being able to be slidably combined into a complete annular shape and covering the outer side of the first annular sealing surface; the first driving part being connected to the protection blocks, and being used to drive the protection blocks to slide; a second protection assembly, the second protection assembly comprising a plurality of protection covers and a plurality of second driving parts, the protection covers being connected to the valve core, the plurality of protection covers being able to be movably assembled into a complete annular shape and being arranged on the outside of the second annular sealing surface; the second driving part being connected to the protection covers, and being used to drive the protection covers to move; In which, the driving cylinder drives the valve stem to slide, and when the second annular sealing surface of the valve core abuts the first annular sealing surface of the valve seat, the passage from the exhaust gas inlet end to the exhaust gas outlet end is closed; when the second annular sealing surface of the valve core is disengaged from the first annular sealing surface of the valve seat, the passage from the exhaust gas inlet end to the exhaust gas outlet end is opened, and multiple protective blocks are covered on the outside of the first annular sealing surface, and multiple protective covers are arranged on the outside of the second annular sealing surface.

2. The tail gas vent valve for carbon black production according to claim 1, characterized in that: The first driving unit includes: a base plate, the base plate being fixedly connected to the valve seat; a first spring, one end of the first spring being connected to the substrate, the other end of the first spring being connected to the protection block, and the first spring being used to drive the protection block away from the substrate; A control rope, one end of which is connected to the protection block, and the control rope is used to pull the protection block to move.

3. The tail gas vent valve for carbon black production according to claim 2, characterized in that: The first driving unit further includes: A guide rod, the guide rod being connected to the valve body, the control rope being wound around the guide rod, the pulling direction of the control rope after winding around the guide rod being opposite to that before winding, and the pulling direction of the control rope being parallel to the moving direction of the valve stem; a pulling plate connected to one end of the control rope; a fixing plate connected to the valve body; a second spring, one end of the second spring being connected to the pulling plate, the other end of the second spring being connected to the fixed plate, the second spring being used to drive the pulling plate away from the fixed plate; and the elastic coefficient of the second spring being greater than the elastic coefficient of the first spring; A control rod is fixedly connected to the valve stem, and the control rod can push the pulling plate to approach the fixed plate.

4. The tail gas vent valve for carbon black production according to claim 1, characterized in that: The second driving unit includes: A control telescopic rod, one end of which is connected to the protective cover; A slider is connected to the other end of the control telescopic rod, the valve stem is provided with a slide groove along its length, and the slider is embedded in the slide groove for sliding connection; a third spring, one end of the third spring being connected to the slider, the other end of the third spring being connected to the protective cover, the third spring being sleeved outside the control telescopic rod, and the third spring being used to drive the protective cover away from the valve stem; A pushing block, the pushing block is fixedly connected to the inner side wall of the valve body, the pushing block is provided with an inclined pushing guide surface, and the protective cover is matched with a pushed guide surface; A limit plate is fixedly connected to the bottom of the valve body and is used to abut and limit the bottom end of the protective cover.

5. The tail gas vent valve for carbon black production according to claim 1, characterized in that: The drive assembly further includes a connecting portion, the connecting portion including: a bracket tube, one end of which is fixedly connected to the valve cover, and the other end of which is connected to the fixed end of the drive cylinder; A connecting sleeve is arranged in the bracket tube, and one end of the connecting sleeve is connected to the valve stem, and the other end of the connecting sleeve is connected to the movable end of the driving cylinder.

6. The tail gas vent valve for carbon black production according to claim 5, characterized in that: The inner cavities at both ends of the connecting sleeve are respectively provided with left-handed threads and right-handed threads, and the movable ends of the valve stem and the drive cylinder are respectively threadedly connected to the connecting sleeve. The connecting part also includes a left-handed nut and a right-handed nut, and the left-handed nut and the right-handed nut are respectively locked at both ends of the connecting sleeve.

7. The tail gas vent valve for carbon black production according to claim 1, characterized in that: Also included is a feedback component, the feedback component comprising: a base connected to a fixed end of the drive cylinder; a connecting rod connected to a movable end of the driving cylinder; a slide plate, one end of which is connected to the connecting rod, and the slide plate is slidably arranged on the base, and an inclined guide groove is provided on the slide plate; A feedback rod, the feedback rod being inserted into the guide groove; a rotating plate, one end of which is connected to the feedback rod; A locator is fixedly mounted on the base, and the other end of the rotating plate is connected to the positioning shaft on the locator, and the locator can obtain rotation information of the positioning shaft.

8. The tail gas vent valve for carbon black production according to claim 1, characterized in that: An arc-shaped sealing head is provided on the side of the valve core facing the valve seat.

9. The tail gas vent valve for carbon black production according to claim 1, characterized in that: The tail gas inlet end of the valve seat is provided with a flange.

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