Steering mechanism of angular travel valve

Abstract

The invention relates to the technical field of valves, in particular to a steering mechanism of an angular travel valve, which is provided with a connecting valve cover, a moving shaft, a lifting rod, a guide pin and a sliding groove structure, so that only axial linear motion is generated when the valve is opened and closed, a corrugated pipe is not subjected to torsional moment, and the service life of the corrugated pipe is prolonged; according to the technical scheme, one end of a steering mechanism is connected with a valve ball, the other end of the same axis is connected with a hand wheel, and the valve ball on the same axis is driven by the hand wheel to rotate; the steering mechanism comprises a lower valve rod, a lifting rod, a guide pin and a corrugated pipe; the bottom of the lower valve rod is connected with the top of the valve ball, the lower valve rod is of a columnar structure, the lower end of the lower valve rod is connected with the valve ball, an annular flange part is arranged above the connecting position of the lower valve rod and the valve ball, the diameter of the flange part is larger than that of the lower valve rod, a step difference structure is formed, and the flange part divides the lower valve rod into a first section and a second section.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a steering mechanism of an angular stroke valve. Background Art

[0002] As a commonly used control element in industrial piping systems, quarter-turn valves are widely used in petrochemical, natural gas, electric power, metallurgy, medicine and other fields to control the on-off and flow regulation of the medium; traditional quarter-turn valves mostly adopt a packing sealing structure, which drives the valve ball or valve plate to achieve opening and closing actions by rotating the valve stem; however, this type of structure has problems such as reduced sealing performance, packing wear and leakage, and torsional fatigue of the bellows under frequent opening and closing or high-temperature and high-pressure conditions, which makes it difficult to meet the current requirements for safety, sealing and operating accuracy.

[0003] Especially when conveying toxic, volatile, or highly corrosive media, any minor leak in the valve stem can pose a significant safety hazard. Therefore, some technical solutions have proposed the use of bellows seals to improve sealing performance. However, existing bellows-sealed valves often use a rotary valve core to open and close. During this process, the bellows undergo torsional fatigue as the valve stem rotates, severely impacting the bellows' service life and sealing reliability. Furthermore, traditional bellows valves are often complex in structure, making them difficult to manufacture and maintain, making them unsuitable for frequent use and rapid replacement in industrial settings.

[0004] Therefore, how to design an angular stroke valve steering mechanism with compact structure, precise transmission, easy operation, no bellows involved in rotation, and high sealing reliability and good adaptability. In order to solve the above problems, in this application, a steering mechanism of an angular stroke valve is used to achieve stable opening and closing and sealing control under complex working conditions through the synergistic effect of the guiding structure and the sealing structure, which has significant engineering application value and promotion prospects. Summary of the Invention

[0005] In response to the above situation, the present invention provides a steering mechanism for an angular stroke valve. The device is equipped with a connecting valve cover, a movable shaft, a lifting rod, a guide pin and a sliding groove structure, so that only axial linear motion is generated when the valve is opened and closed, and the bellows is not subjected to torsional torque, thereby extending the life of the bellows.

[0006] A steering mechanism for an angular stroke valve, comprising a valve body, a valve ball, a connecting valve cover, a bracket, and a handwheel; the steering mechanism is disposed within the valve body, connecting the valve cover, and the bracket; one end of the steering mechanism is connected to the valve ball, and the other end, coaxially connected, is connected to the handwheel, and the handwheel drives the valve ball, coaxially connected, to rotate; the steering mechanism comprises a lower valve stem, a lifting rod, a guide pin, and a bellows;

[0007] The bottom of the lower valve stem is connected to the top of the valve ball. The lower valve stem is a columnar structure, and its lower end is connected to the valve ball. An annular flange is provided above the connection between the lower valve stem and the valve ball. The diameter of the flange is larger than that of the lower valve stem, forming a step-difference structure. The flange divides the lower valve stem into a first section and a second section. The end close to the valve ball is the first section with a short length, and the end away from the valve ball is the second section with a long length. The end of the lower valve stem away from the valve ball is provided with a through hole in the transverse direction, and the through hole passes through the left and right sides of the lower valve stem. The top of the lower valve stem is provided with a circular hole, which is connected to the transverse through hole to form an internal channel, wherein the guide pin is provided in the through hole, and a screw is provided in the circular hole, and the bottom of the screw is connected to the middle of the guide pin.

[0008] The second section of the lower valve stem extends from the valve body to the middle and lower part of the connecting valve cover, and the lifting rod is sleeved on the second section of the lower valve stem and installed in cooperation with the connecting valve cover. The lifting rod includes a sleeve shaft and a movable shaft, and the sleeve shaft is provided with a cavity, and the sleeve shaft is sleeved on the second section of the lower valve stem through the cavity; the handwheel is threadedly connected to the end of the movable shaft away from the sleeve shaft, and the handwheel is driven to cause the movable shaft to drive the sleeve shaft to perform linear motion along the inner cavity of the connecting valve cover; wherein, a sliding groove corresponding to the starting position of the two ends of the through hole is respectively provided on both sides of the surface of the sleeve shaft, and the sliding groove extends along an inclined path, and its inclined path corresponds to the contact track of the guide pin when the sleeve shaft performs linear motion;

[0009] The bellows is sleeved on the sleeve shaft, and the bottom is engaged in the middle of the connection between the valve body and the valve cover. The top diameter is smaller than the sleeve shaft diameter. The bottom of the bellows is flush with the bottom of the sleeve shaft. There is a first gap between the bellows and the lower surface of the sleeve shaft and the valve body.

[0010] Preferably, the valve body is provided with a communication groove, a positioning groove, a negative pressure groove and a connection groove in sequence in the area directly above the valve ball;

[0011] The diameter of the communication groove is adapted to the diameter of the lower valve stem, and the lower valve stem is adapted to be penetrated by the communication groove;

[0012] The diameter of the clamping groove is larger than that of the connecting groove, the flange portion is adapted to be inserted into the clamping groove, a first gasket is provided on both sides of the clamping groove, and the flange portion is provided in the middle of the two first gaskets;

[0013] The negative pressure groove is arranged on the upper side of the clamping groove, and its diameter is larger than that of the clamping groove;

[0014] The connecting groove is arranged on the upper side of the negative pressure groove, and its diameter is larger than that of the negative pressure groove.

[0015] Preferably, a pressure cover is provided in the negative pressure groove. The pressure cover adopts a hollow ring structure and is annular as a whole. The outer diameter of the pressure cover is adapted to the diameter of the negative pressure groove, and the inner diameter is adapted to the diameter of the lower valve stem. The pressure cover realizes the assembly limit of the flange part by pressing against the first gasket.

[0016] Preferably, one end of the connecting valve cover connected to the valve body is provided with a corresponding groove of the same size as the connecting groove, and a second gasket is provided in each of the connecting groove and the corresponding groove;

[0017] The bottom of the bellows extends outward to form an extension portion, and the extension portion is arranged between the two second gaskets. The bellows is fixed by clamping the extension portion through connecting and fixing the valve cover and the bracket.

[0018] Preferably, the lower valve stem is sleeved in the cavity, with a second gap between the top of the lower valve stem and the end of the cavity; a tapered groove is provided at the end of the cavity facing away from the lower valve stem.

[0019] Preferably, a lower groove is provided on the side of the connecting valve cover away from the valve body, and one end of the bracket connected to the connecting valve cover extends toward the connecting valve cover to form a convex shaft, the convex shaft is inserted into the lower groove, and a third gasket is provided in the middle of the connection between the lower groove and the convex shaft.

[0020] Preferably, the movable shaft includes a limiting section and a connecting section;

[0021] The limiting section and the connecting section are both cylindrical, wherein the limiting section has a larger diameter than the connecting section;

[0022] The two sides of the surface of the limiting section are inwardly recessed to form two square grooves, and one end of the connecting valve cover and the bracket is provided with a limiting groove adapted to the square groove, and the square groove limits the left and right rotation of the limiting section when it moves up and down;

[0023] The connecting section is provided with a threaded pattern on a side away from the limiting section. The connecting section is connected to a screw nut via the threaded pattern. The screw nut is engaged with the handwheel. A gland nut is provided on one side of the screw nut located on the upper surface of the handwheel.

[0024] Preferably, a sealing assembly is provided on the top of the bracket, and the sealing assembly includes a packing material, a packing pressure shaft, a packing pressure plate and a movable bolt;

[0025] The filler material is filled in the top of the stent cavity;

[0026] The packing pressure shaft is located on the upper side of the packing material and is inserted into the top of the bracket;

[0027] The packing pressure plate is arranged on the upper side of the packing pressure shaft;

[0028] Two ear shafts are extended outwardly from both side surfaces of the bracket. One end of the movable bolt is rotatably arranged on the ear shaft, and the other end of the movable bolt is upwardly passed through the packing pressure plate.

[0029] Preferably, the sliding groove is divided into area A, area B and area C;

[0030] The size of the A area is adapted to the size of the guide pin;

[0031] The B area is arranged in an inclined manner as a whole;

[0032] The C zone is arranged vertically downward along the B zone away from one end of the A zone until it extends to the end of the sleeve shaft.

[0033] The beneficial effects of the above technical solution are:

[0034] (1) By setting up the connection between the valve cover, moving shaft, lifting rod, guide pin and sliding groove structure, the valve only produces axial linear motion when opening and closing, and the bellows is not subjected to torsional torque, thereby extending the life of the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of the angular stroke valve of the present invention;

[0036] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0037] Figure 3 This is a schematic diagram of the tapered groove structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the first gap structure of the present invention;

[0039] Figure 5 This is a schematic diagram of the screw structure of the present invention;

[0040] Figure 6 This is the intention of showing the planar structure of the sleeve shaft of the present invention;

[0041] Figure 7 This is a perspective structural diagram of the guide pin of the present invention;

[0042] Figure 8 This is a schematic structural diagram of area A of the present invention;

[0043] Figure 9 This is a schematic diagram of the square groove structure of the present invention;

[0044] Figure 10 It is a schematic diagram of the screw and nut structure of the present invention.

[0045] In the figure: 1. valve body; 2. valve ball; 21. connecting groove; 22. positioning groove; 221. first gasket; 23. negative pressure groove; 24. connecting groove; 25. gland; 26. corresponding groove; 27. second gasket; 3. connecting valve cover; 4. bracket; 41. sealing assembly; 411. packing material; 412. packing pressure shaft; 413. packing pressure plate; 414. live bolt; 401. trunnion; 5. handwheel; 6. lower valve stem; 61. flange; 7. lifting rod; 71. sleeve shaft; 711. cavity; 72. Movable shaft; 721, limiting section; 722, connecting section; 723, square groove; 724, threaded pattern; 725, screw nut; 726, gland nut; 727, limiting groove; 8, guide pin; 9, bellows; 91, extension; 10, through hole; 11, round hole; 111, screw; 12, sliding groove; 121, area A; 122, area B; 123, area C; 13, first gap; 14, second gap; 15, tapered groove; 16, lower groove; 17, convex shaft; 18, third gasket. DETAILED DESCRIPTION

[0046] The above and other technical contents, features and effects of the present invention are described below with reference to the attached Figures 1 to 10 It can be clearly presented in the detailed description of the embodiments that the structural contents mentioned in the following embodiments are all referenced to the drawings in the specification.

[0047] This application proposes a steering mechanism for an angular stroke valve, which is specifically as follows:

[0048] For reference Figure 1 、 Figure 2 The present application mainly includes the lower valve stem 6, lifting rod 7, guide pin 8 and bellows 9 structures. Through the coordination between the four groups of structures, it can be installed and adapted for use in a variety of valves. The bellows 9 and the driving structure (handwheel 5) can be arranged along the same axis. While ensuring high sealing performance, there is no need to consider the problem of synchronous rotation of the bellows 9 during the driving process, so that effective drive control can be achieved on the same side of the valve, which is adapted to the space layout requirements under complex working conditions. At the same time, in the existing same-side settings, most of the bellows are driven to perform twisting work synchronously. The present application can reduce the occurrence of this problem, reduce the problem of synchronous twisting of the bellows during driving, and avoid the loss of the bellows under long-term torsion, which affects the sealing effect.

[0049] For reference Figure 1 、 Figure 2In one embodiment, an angular stroke valve is used in conjunction with the present application, wherein the angular stroke valve includes a valve body 1, a valve ball 2, a connecting valve cover 3, a bracket 4 and a handwheel 5; a steering mechanism is arranged inside the valve body 1, the connecting valve cover 3 and the bracket 4, one end of the steering mechanism is connected to the valve ball 2, and the other end of the same axis is connected to the handwheel 5. The handwheel 5 drives the valve ball 2 on the same axis to rotate. During the rotation, the bellows 9 on the lifting rod 7 is not affected by it, and the bellows 9 does not rotate due to the movement of the lifting rod 7, thereby avoiding problems such as frequent distortion and easy wear of the bellows 9 affecting the sealing effect.

[0050] For reference Figure 1 、 Figure 2 The valve body 1 is a common straight-through valve body setting, the valve ball 2 is a common shape setting, the connecting valve cover 3 is matched with the diameter of the bellows 9 and the up and down movement of the lifting rod 7, and the height and diameter are set, and the bracket 4 is connected to the coaxial side of the connecting valve cover 3 to install and support the handwheel 5 for dedicated work.

[0051] Specific references Figure 1 、 Figure 2 、 Figure 3 The valve body 1 is located just above the valve ball 2 and is provided with a connecting groove 21, a positioning groove 22, a negative pressure groove 23 and a connecting groove 24 in sequence. The diameter of the connecting groove 21 is adapted to the diameter of the lower valve stem 6;

[0052] The lower valve stem 6 is adapted to penetrate the connecting groove 21 and connect with the valve ball 2 for movement. The diameter of the positioning groove 22 is larger than that of the connecting groove 21. At the same time, an annular flange portion 61 is provided above the connection between the lower valve stem 6 and the valve ball 2. The flange portion 61 is adapted to penetrate the positioning groove 22. A first gasket 221 is provided on both sides of the positioning groove 22. The sum of the heights of the flange portion 61 and the two first gaskets 221 is consistent with the height of the positioning groove 22. The setting forms a limit to prevent the subsequent up and down movement of the lower valve stem 6, thereby affecting the sealing of the entire valve. The first gaskets 221 provided on both sides provide flexible buffering to prevent hard metal collisions and also increase its sealing effect.

[0053] Furthermore, the diameter of the flange portion 61 is larger than that of the lower valve stem 6, forming a step-difference structure. The flange portion 61 divides the lower valve stem 6 into a first section and a second section. The end close to the valve ball 2 is the first section with a short length, and the end away from the valve ball 2 is the second section with a long length. The setting of the different overall lengths makes it possible to reduce the overall setting of the lower valve stem 6 being too long or too segmented, which affects the connection and cooperation between it and the lifting rod 7, thereby further affecting the setting of the connection valve cover 3, making the overall compact and beautiful.

[0054] The negative pressure groove 23 is arranged on the upper side of the positioning groove 22, and its diameter is larger than the positioning groove 22. In conjunction with the arrangement of the above four groups of grooves, it is further arranged in the groove. A pressure cover 25 is arranged in the negative pressure groove 23. The pressure cover 25 adopts a hollow circular ring structure and is annular as a whole. The outer diameter of the pressure cover 25 is adapted to the negative pressure groove 23, and the inner diameter is adapted to the diameter of the lower valve stem 6. The pressure cover 25 realizes the assembly limit of the flange portion 61 by pressing against a first gasket 221 at the upper side end, thereby limiting the up and down movement of the lower valve stem 6, which is also convenient for disassembly or assembly; it should be noted that there are multiple bolts distributed in a ring on the pressure cover 25, and the bolts pass through the pressure cover 25 to form a connection with the valve body 1, thereby achieving a fixing effect. After the lower valve stem 6 is fixed by the flange portion 61, a stable support is provided for the subsequent movement of the guide pin 8 and the lifting rod 7.

[0055] The connecting groove 24 is arranged on the upper side of the negative pressure groove 23, and its diameter is larger than the negative pressure groove 23. The end at which the connecting valve cover 3 is connected to the valve body 1 is provided with a corresponding groove 26 of the same size as the connecting groove 24. An adaptive second gasket 27 is provided in the connecting groove 24 and the corresponding groove 26. The bottom of the bellows 9 extends outward to form an extension portion 91. The extension portion 91 is inserted between the two second gaskets 27 and is located in the middle position of its connection; the total height of the extension portion 91 and the two second gaskets 27 matches the total height of the connecting groove 24 and the corresponding groove 26. By setting the connecting groove 24 and the corresponding groove 26 between the valve body 1 and the connecting valve cover 3, and setting the extension portion 91, the bottom of the bellows 9 is fixed through the two second gaskets 27 when the valve body 1 and the connecting valve cover 3 are connected. Its connection form makes its partial connection form more convenient, reduces the structure required for fixing the bellows 9 separately, has fewer parts, and relatively reduces potential failure points.

[0056] For reference Figure 2 、 Figure 4-Figure 8 The bottom of the lower valve stem 6 is connected to the top of the valve ball 2. The lower valve stem 6 is a columnar structure, and its lower end is connected to the valve ball 2. The rotation of the valve ball 2 is inseparable from the setting of the lower valve stem 6; and to achieve the above-mentioned operating movement in the coaxial position; a through hole 10 is horizontally penetrated at the end of the lower valve stem 6 away from the valve ball 2. The through hole 10 passes through the left and right sides of the lower valve stem 6, wherein the guide pin 8 is inserted into the through hole 10;

[0057] For reference Figure 2-Figure 3, and in the setting of fixing the guide pin 8, a circular hole 11 is further provided at the top of the lower valve stem 6. The circular hole 11 is connected to the middle part of the transverse through hole 10 to form a passage. A screw 111 is passed through the circular hole 11, and the bottom position of the screw 111 is connected and fixed with the middle part of the guide pin 8 inserted in the through hole 10, thereby prompting the guide pin 8 to be fixed on the lower valve stem 6 to work; it should be noted that the two sides of the guide pin 8 are set through the through hole 10, and the lengths of the two sides are consistent. Fixing the guide pin 8 in the top area of ​​the lower valve stem 6 is not only convenient for installation and disassembly, but also prompts that there is no thread setting around the exposed guide pin 8, so that the surface of the lower valve stem 6 near the setting area is smooth, reducing the risk of friction when contacting the lifting rod 7.

[0058] For reference Figure 2 、 Figure 4 、 Figure 6-Figure 7 The second section of the lower valve stem 6 extends from the valve body 1 to the middle and lower part of the valve cover 3. The lifting rod 7 is sleeved in the extension section and is installed in conjunction with the valve cover 3. The lifting rod 7 includes a sleeve shaft 71 and a movable shaft 72. The sleeve shaft 71 is provided with a cavity 711. The sleeve shaft 71 is sleeved on the extension section of the lower valve stem 6 through the cavity 711. The movable shaft 72 is directly smaller than the diameter of the sleeve shaft 71. The handwheel 5 is threadedly connected to the end of the movable shaft 72 away from the sleeve shaft 71. The handwheel 5 is driven to cause the movable shaft 72 to drive the sleeve shaft 71 to move up and down in a straight line along the inner cavity of the valve cover 3; wherein, sliding grooves 12 corresponding to the starting positions of the two ends of the through hole 10 are respectively provided on both sides of the surface of the sleeve shaft 71. The sliding grooves 12 extend along an inclined path, and the inclined path corresponds to the contact track of the guide pin 8 when the sleeve shaft 71 moves linearly;

[0059] Further reference Figure 3 The lower valve stem 6 is sleeved in the cavity 711, and a second gap 14 is left between the top of the lower valve stem 6 and the end of the cavity 711; the end of the cavity 711 is provided with a tapered groove 15 for dispersing stress toward the side away from the lower valve stem 6; the tapered groove 15 is located at the end of the cavity 711, and extends toward the side away from the lower valve stem 6, which helps to disperse concentrated stress during the movement or force of the lower valve stem 6, prevent stress from concentrating at the end of the cavity, reduce material fatigue or cracks, and thus extend the life of parts; the reservation of the second gap 14 can provide a buffer space when the lower valve stem 6 is subjected to axial impact or thermal expansion, thereby avoiding damage to components due to the deadlock structure, and is particularly suitable for working conditions with rapid opening and closing or frequent movement.

[0060] Further reference Figure 4The bellows 9 is sleeved on the sleeve shaft 71, and the bottom is engaged in the middle of the connection between the valve body 1 and the connecting valve cover 3; the diameter of its top is smaller than the diameter of the sleeve shaft 71, which enables it to stably sleeve on the surface of the sleeve shaft 71 and move; the bottom of the bellows 9 is flush with the bottom of the sleeve shaft 71, and there is a first gap 13 between the bellows 9 and the lower surface of the sleeve shaft 71 and the valve body 1; the bottom of the bellows 9 is engaged between the valve body 1 and the connecting valve cover 3, which helps to form an effective sealing structure and isolate external stress when the valve system is pressurized or in operation, preventing stress from being directly transmitted to internal sensitive structures (such as the valve ball 2 connected to the bottom of the lower valve stem 6); at the same time, the bellows 9 and the lower surface of the sleeve shaft 71 retain a first gap 13 with the valve body 1 to avoid direct contact between the bellows and the valve body 1 during work, prevent friction, jamming or interference, and ensure the flexibility of system movement.

[0061] Further reference Figure 8 , the sliding groove 12 is specifically described as being divided into an A zone 121, a B zone 122, and a C zone 123. The size of the A zone 121 is adapted to the size of the guide pin 8 and is arc-shaped, so that it does not shake left and right and affect the internal structure when stationary; the B zone 122 is arranged as a whole in an inclined manner, and the inclined path design corresponds to the contact trajectory of the guide pin 8 when the sleeve shaft 71 makes a linear motion, thereby avoiding jamming during the movement; the C zone 123 is arranged vertically downward along the end of the B zone 122 away from the A zone 121, until it extends to the end of the sleeve shaft 71. This arrangement facilitates its subsequent assembly with the guide pin 8;

[0062] When the guide pin 8 is in area A, the valve ball 2 does not change. At this time, the valve ball 2 is located in the valve body 1 in a sealed state. When the guide pin 8 is located in area B 122, the valve ball 2 is located in the valve body 1 in a gradually opening and sealing state. When the guide pin 8 enters area C 123, the valve ball 2 rotates to fully open, no longer blocking the flow path in the valve body 1, and the flow rate is the smoothest. It should be noted that the depth of the sliding groove 12 is adapted to the size of the exposed portion of the guide pin 8, thereby reducing the friction between the guide pin 8 and the bellows 9 when the guide pin 8 is located in the sliding groove 12. It should be noted that the size of the guide pin 8 is adapted to the size of area C 123, and the guide pin 8 moves up and down by rotation. The guide pin 8 is relatively restricted in area C 123 from moving again in the rotation direction, which can achieve a positioning effect.

[0063] For reference Figure 1 In order to ensure the connection between the overall structure, the connection relationship between the connecting valve cover 3 and the bracket 4 is further set. A lower groove 16 is provided on the side of the connecting valve cover 3 away from the valve body 1. The end of the bracket 4 connected to the connecting valve cover 3 extends toward the connecting valve cover 3 to form a convex shaft 17. The convex shaft 17 is inserted into the lower groove 16. A third gasket 18 is provided in the middle of the connection between the lower groove 16 and the convex shaft 17, thereby completing the connection relationship between the connections.

[0064] For reference Figure 2 、 Figure 4 、 Figures 6-10 , and in the process of rotating the hand wheel 5, when the lifting rod 7 is limited and does not rotate, the movable shaft 72 is further limited, and the movable shaft 72 includes a limiting section 721 and a connecting section 722;

[0065] The limiting section 721 and the connecting section 722 are both cylindrical, wherein the limiting section 721 has a larger diameter than the connecting section 722;

[0066] Among them, the two sides of the surface of the limiting section 721 are recessed inward to form two square grooves 723, and a limiting groove 727 adapted to the square groove 723 is provided at one end connecting the valve cover 3 and the bracket 4. The square groove 723 limits the left and right rotation of the limiting section 721 when it moves up and down; the shape of the limiting groove 727 is approximately the shape of a vertical cut on both sides of the symmetrical circle.

[0067] The side of the connecting section 722 facing away from the limiting section 721 is provided with a threaded pattern 724. A screw nut 725 is connected to the connecting section 722 via the threaded pattern 724. The screw nut 725 engages with the handwheel 5. A gland nut 726 is provided on the side of the screw nut 725 located on the upper surface of the handwheel 5. The gland nut 726, located above the screw nut 725, acts as a clamping and limiting device. The provision of the threaded pattern 724 on the side of the connecting section 722 facing away from the limiting section 721, combined with the engagement of the screw nut 725 with the handwheel 5, creates an adjustable threaded drive structure. The user can precisely control the position or preload of the connecting section 722 via the handwheel 5. A gland nut 726 is provided above the screw nut 725 to further enhance locking force and vibration stability, ensuring structural reliability and adjustment accuracy during operation. Once adjustment is complete, tightening the gland nut 726 prevents the screw nut 725 from accidentally rotating or loosening during operation, thereby enhancing the stability and safety of the valve system.

[0068] For reference Figure 2 On the internal packing, the sealing design inside the bracket 4 is further provided with a sealing assembly 41, the sealing assembly 41 includes a packing material 411, a packing pressure shaft 412, a packing pressure plate 413 and a movable bolt 414;

[0069] The filler material 411 is filled at the top of the inner cavity of the bracket 4. In this application, five filler materials 411 are suitable for selection. The two filler materials 411 on the two sides are braided filler materials, and the remaining three can be selected from commonly suitable filler materials based on the scene budget, etc. It should be noted that the braided filler material (usually such as aramid braid, graphite braid, etc.) filled in on both sides is used to enhance wear resistance and edge sealing. The three fillers in the middle can be selected according to the specific working conditions (such as flexible graphite, PTFE, carbon fiber, etc.), so that the entire sealing assembly achieves a balance between performance, cost, and life. This arrangement facilitates the implementation of customized sealing solutions and enhances adaptability under different working conditions.

[0070] The packing pressure shaft 412 is located on the upper side of the packing material 411 and is inserted into the top of the bracket 4, and the packing pressure plate 413 is located on the upper side of the packing pressure shaft 412; two side surfaces of the bracket 4 protrude outward with two ear shafts 401, and one end of the swing bolt 414 is rotatably set on the ear shaft 401, and the other end of the swing bolt 414 is upwardly passed through the packing pressure plate 413; one end of the swing bolt 414 is rotatably connected to the ear shaft 401 to realize the flipping and opening or quick unlocking of the structure. For on-site operators, there is no need to completely dismantle the whole structure. They only need to loosen or flip up the swing bolt to quickly replace or re-pressurize the packing, which improves maintenance efficiency and convenience of use. It is especially suitable for occasions that require frequent inspections or fragile seals.

[0071] The packing pressing shaft 412 cooperates with the packing pressure plate 413 up and down, and can generate a stable axial pressing force under the action of the movable bolt 414, pressing the packing in the inner cavity of the bracket 4 to achieve a good seal; the pressing force can be fine-tuned by the movable bolt 414 in the structure to adapt to the re-pressing of the packing material 411 after wear, without the need to frequently replace the packing material 411; the movable bolt 414 is passed through the packing pressure plate 413 to ensure that the pressing force is evenly transmitted to avoid local leakage caused by bias pressure.

[0072] In view of the above, the installation and assembly of the device and an angular stroke valve are as follows:

[0073] First, pass the lower valve stem 6 through the connecting groove 21 on the valve body 1 so that its lower end is connected to the valve ball 2; ensure that the annular flange portion 61 above the lower valve stem 6 is located in the positioning groove 22, and place the first gasket 221 on both sides to achieve positioning and sealing; install the pressure cover 25 in the negative pressure groove 23 and fix it with bolts to further limit the up and down movement of the lower valve stem 6.

[0074] Secondly, insert the extension portion 91 of the bellows 9 between the connecting groove 24 of the valve body 1 and the corresponding groove 26 of the connecting valve cover 3, and clamp the second gasket 27 to achieve sealing; connect the connecting valve cover 3 to the valve body 1 to ensure that the bottom of the bellows 9 is fixed, reduce the number of parts, and improve sealing reliability.

[0075] Next, the sleeve shaft 71 of the lifting rod 7 is mounted on the lower valve stem 6, ensuring that a second gap 14 is left between the cavity 711 and the lower valve stem 6, and the tapered groove 15 disperses stress during operation; a guide pin 8 is passed through the through hole 10 of the lower valve stem 6 and fixed by a screw 111 in the circular hole 11, ensuring that both ends of the guide pin 8 are evenly extended to avoid friction with the lifting rod 7.

[0076] Then, the movable shaft 72 includes two parts: a limiting section 721 and a connecting section 722. The square groove 723 on the limiting section 721 cooperates with the limiting groove 727 on the connecting valve cover 3 to limit its rotation; the thread pattern 724 of the connecting section 722 is connected to the screw nut 725, and the screw nut 725 is engaged with the handwheel 5 and fixed by the pressure cover nut 726 to ensure the stability of the structure.

[0077] Finally, the packing material 411 is installed inside the bracket 4, with the braided packing material on the outside and the common packing material in the middle; the packing pressure shaft 412 and the packing pressure plate 413 are installed in sequence above the packing material 411, and connected to the ear shaft 401 of the bracket 4 through the movable bolt 414 to achieve the compression and sealing of the packing.

[0078] In view of the above, the operation of the device and an angle-turn valve is as follows:

[0079] First, the hand wheel 5 is rotated to drive the movable shaft 72 through the screw nut 725 to move it in the axial direction; the movable shaft 72 drives the sleeve shaft 71 to move up and down along the inner cavity of the valve cover 3 in a straight line;

[0080] According to the above operation, the guide pin 8 slides in the sliding groove 12 of the sleeve shaft 71. The sliding groove 12 is divided into area A 121 (static sealing), area B 122 (gradual opening) and area C 123 (fully open); when the guide pin 8 is located in different areas, the opening degree of the valve ball 2 changes accordingly, realizing the opening and closing control of the valve, and no rotational movement occurs between the guide pin 8 and the bellows 9.

[0081] Finally, a first gap 13 is retained between the bellows 9 and the lower surface of the sleeve shaft 71 and the valve body 1 to avoid direct contact, friction and interference; the sealing assembly can re-tighten the packing material 411 through adjustment of the movable bolt 414, adapt to wear and extend the service life.

[0082] Among them, the steering mechanism can be adapted and installed in different similar angular stroke valves for use, and is not limited to the above-mentioned implementation. Through the cooperation between the steering mechanism and the angular stroke valve proposed in this application, the bellows 9 is reduced in damage, the service life is increased, and the occurrence of unstable sealing after damage is reduced.

[0083] The above description is only for illustrating the present invention. It should be understood that the present invention is not limited to the above embodiments, and various variations that conform to the concept of the present invention are within the scope of protection of the present invention.

Claims

1. A steering mechanism for an angular stroke valve, the angular stroke valve comprising a valve body (1), a valve ball (2), a connecting valve cover (3), a bracket (4) and a hand wheel (5); characterized in that: The steering mechanism is arranged inside the valve body (1) connecting the valve cover (3) and the bracket (4), one end of the steering mechanism is connected to the valve ball (2), and the other end of the same axis is connected to the hand wheel (5), and the hand wheel (5) drives the valve ball (2) on the same axis to rotate; the steering mechanism includes a lower valve stem (6), a lifting rod (7), a guide pin (8) and a bellows (9); The bottom of the lower valve stem (6) is connected to the top of the valve ball (2). The lower valve stem (6) is a columnar structure, and its lower end is connected to the valve ball (2). An annular flange portion (61) is provided above the connection between the lower valve stem (6) and the valve ball (2). The diameter of the flange portion (61) is larger than that of the lower valve stem (6), forming a step-difference structure. The flange portion (61) divides the lower valve stem (6) into a first section and a second section. The end close to the valve ball (2) is the first section with a short length, and the end away from the valve ball (2) is the second section. The length is long; a through hole (10) is provided transversely through one end of the lower valve stem (6) away from the valve ball (2), and the through hole (10) passes through the left and right sides of the lower valve stem (6); a circular hole (11) is provided on the top of the lower valve stem (6), and the circular hole (11) is connected with the transverse through hole (10) to form an internal channel, wherein the guide pin (8) is provided in the through hole (10), and a screw (111) is provided in the circular hole (11), and the bottom of the screw (111) is connected to the middle of the guide pin (8); The second section of the lower valve stem (6) extends from the valve body (1) to the middle and lower part of the connecting valve cover (3), the lifting rod (7) is sleeved on the second section of the lower valve stem (6) and is installed in conjunction with the connecting valve cover (3), the lifting rod (7) includes a sleeve shaft (71) and a movable shaft (72), the sleeve shaft (71) is provided with a cavity (711), and the sleeve shaft (71) is sleeved on the second section of the lower valve stem (6) through the cavity (711); the hand wheel (5) and the movable shaft (72) are connected. 2) One end away from the sleeve shaft (71) is threadedly connected, and the hand wheel (5) is driven to cause the movable shaft (72) to drive the sleeve shaft (71) to move linearly along the inner cavity of the valve cover (3); wherein, a sliding groove (12) corresponding to the starting position of the two ends of the through hole (10) is respectively provided on both sides of the surface of the sleeve shaft (71), and the sliding groove (12) extends along an inclined path, and the inclined path corresponds to the contact track of the guide pin (8) when the sleeve shaft (71) moves linearly; The bellows (9) is sleeved on the sleeve (71), and its bottom is engaged in the middle of the connection between the valve body (1) and the valve cover (3). The diameter of its top is smaller than the diameter of the sleeve (71). The bottom of the bellows (9) is flush with the bottom of the sleeve (71), and a first gap (13) exists between the lower surface of the bellows (9) and the lower surface of the sleeve (71) and the valve body (1).

2. The steering mechanism of the angular stroke valve according to claim 1, characterized in that: The valve body (1) is provided with a communication groove (21), a positioning groove (22), a negative pressure groove (23) and a connection groove (24) in sequence in the area directly above the valve ball (2); The diameter of the communication groove (21) is adapted to the diameter of the lower valve stem (6), and the lower valve stem (6) is adapted to penetrate the communication groove (21); The diameter of the positioning groove (22) is larger than the diameter of the connecting groove (21); the flange portion (61) is adapted to be inserted into the positioning groove (22); a first gasket (221) is provided on both sides of the positioning groove (22); and the flange portion (61) is located in the middle of the two first gaskets (221); The negative pressure groove (23) is arranged on the upper side of the locking groove (22), and its diameter is larger than the locking groove (22); The connecting groove (24) is arranged on the upper side of the negative pressure groove (23), and its diameter is larger than that of the negative pressure groove (23).

3. The steering mechanism of the angular stroke valve according to claim 2, characterized in that: A gland (25) is provided in the negative pressure groove (23). The gland (25) is provided with a hollow circular ring structure and is annular in shape as a whole. The outer diameter of the gland (25) is adapted to the diameter of the negative pressure groove (23), and the inner diameter is adapted to the diameter of the lower valve stem (6). The gland (25) realizes assembly limitation of the flange portion (61) by pressing against the first gasket (221).

4. The steering mechanism of the angular stroke valve according to claim 1, characterized in that: One end of the connecting valve cover (3) connected to the valve body (1) is provided with a corresponding groove (26) having the same size as the connecting groove (24), and a second gasket (27) is provided in each of the connecting groove (24) and the corresponding groove (26); The bottom of the bellows (9) extends outward to form an extension portion (91), and the extension portion (91) is arranged between the two second gaskets (27). The bellows (9) is fixed by clamping the extension portion (91) by connecting and fixing the valve cover (3) and the bracket (4).

5. The steering mechanism of the quarter-turn valve according to claim 1, characterized in that: The lower valve stem (6) is sleeved in the cavity (711), with a second gap (14) remaining between the top of the lower valve stem and the end of the cavity (711); a tapered groove (15) is provided at the end of the cavity (711) facing away from the lower valve stem (6).

6. The steering mechanism of the angular stroke valve according to claim 1, characterized in that: A lower groove (16) is provided on a side of the connecting valve cover (3) away from the valve body (1); one end of the bracket (4) connected to the connecting valve cover (3) extends toward the connecting valve cover (3) to form a convex shaft (17); the convex shaft (17) is inserted into the lower groove (16); and a third gasket (18) is provided in the middle of the connection between the lower groove (16) and the convex shaft (17).

7. The steering mechanism of the angular stroke valve according to claim 1, characterized in that: The movable shaft (72) comprises a limiting section (721) and a connecting section (722); The limiting section (721) and the connecting section (722) are both cylindrical, wherein the limiting section (721) has a larger diameter than the connecting section (722); The two sides of the surface of the limiting section (721) are inwardly recessed to form two square grooves (723), and one end of the connecting valve cover (3) and the bracket (4) is provided with a limiting groove (727) adapted to the square groove (723), and the square groove (723) limits the left and right rotation of the limiting section (721) when the limiting section (721) moves up and down; A threaded pattern (724) is provided on a side of the connecting section (722) away from the limiting section (721), and the connecting section (722) is connected to a screw nut (725) via the threaded pattern (724). The screw nut (725) is engaged with the hand wheel (5), and a gland nut (726) is provided on a side of the screw nut (725) located on the upper surface of the hand wheel (5).

8. The steering mechanism of the angular stroke valve according to claim 1, characterized in that: A sealing assembly (41) is provided on the top of the bracket (4), and the sealing assembly (41) comprises a packing material (411), a packing pressure shaft (412), a packing pressure plate (413), and a movable bolt (414); The filler material (411) is filled in the top of the inner cavity of the bracket (4); The packing pressing shaft (412) is located on the upper side of the packing material (411) and is inserted into the top of the bracket (4); The packing pressure plate (413) is arranged on the upper side of the packing pressure shaft (412); Two trunnions (401) are provided on both side surfaces of the bracket (4) extending outwards, one end of the movable bolt (414) is rotatably mounted on the trunnion (401), and the other end of the movable bolt (414) is upwardly passed through the packing pressure plate (413).

9. The steering mechanism of the quarter-turn valve according to claim 1, characterized in that: The sliding groove (12) is divided into an A zone (121), a B zone (122) and a C zone (123); The size of the A area (121) is adapted to the size of the guide pin (8); The B zone (122) is arranged in an inclined manner as a whole; The C zone (123) is arranged vertically downward along the B zone (122) away from one end of the A zone (121) until it extends to the end of the sleeve shaft (71).

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