Pneumatic control valve with valve element convenient to replace

Abstract

The pneumatic control valve comprises a valve body, a valve seat is arranged on the lower side of the valve body, a quick-change device is arranged on the valve body, the quick-change device comprises a quick-change rod, a quick-change sleeve, an outer side sleeve, a quick-change frame, a quick-change groove, a movable block, an inner side sleeve, a control sleeve, a matching groove and a matching block, the quick-change groove is formed in the outer side of the quick-change rod, and the movable block is arranged on the outer side of the quick-change rod. The movable block is connected to one side of the quick-change frame, the matching groove is formed in the outer wall of the inner side sleeve, the matching block is arranged on the inner wall of the inner side sleeve, a locking mechanism is arranged on the outer side of the quick-change sleeve and comprises a linkage block, a rotating block, a linkage hole, a linkage rod, a linkage spring, a rotating groove, a rotating plate, a locking plate and a locking sleeve, the linkage hole penetrates through the linkage block, the linkage rod is connected to one side of the rotating block, and the linkage rod is connected to the other side of the rotating block. According to the high-pressure and high-vibration high-pressure reversing valve, the valve element can be replaced quickly, easily and conveniently, and stable and reliable connection can be kept in the high-pressure and high-vibration environment. The high-pressure and high-vibration high-pressure reversing valve has the advantages that the valve element can be replaced quickly, easily and conveniently, and the high-pressure and high-vibration high-pressure reversing valve is simple in structure and convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pneumatic control valve, more particularly, it relates to a pneumatic control valve convenient for replacing valve core. BACKGROUND

[0002] In the field of modern industrial automation and fluid control, pneumatic control valves play a crucial role as key components. These valves achieve various mechanical actions and process controls by controlling the flow of compressed air. However, there are still some problems in the design and functionality of current market pneumatic control valves that need to be solved urgently. These problems not only affect the maintenance efficiency of equipment, but also may reduce the reliability and performance of the entire system.

[0003] The primary problem is the complexity of the valve core replacement process. In traditional designs, the connection between the valve body and the valve seat usually uses threads or other fixing mechanisms. When the valve core needs to be replaced, maintenance personnel often need to use professional tools such as wrenches or special disassemblers to perform multiple rotation operations to separate the valve body and the valve seat. This process not only consumes time and effort, but also increases the risk of operation errors. For example, excessive force may cause thread damage or other component deformation, while insufficient force may not complete disassembly. In addition, in narrow or difficult-to-access installation environments, tool use is inconvenient, and this tedious operation is even more difficult, greatly increasing maintenance time and cost.

[0004] Secondly, some manufacturers realize the importance of quick replacement and introduce some designs in their products that simplify the disassembly process, aiming to reduce disassembly time and simplify operation procedures. However, these designs, while improving convenience, have obvious deficiencies in stability and reliability. In high-pressure or high-frequency operating environments, compressed air flows at high speed when the pneumatic control valve is working. This flow not only generates continuous vibration, but also may generate impact force due to sudden changes in airflow. Under the action of these forces, simple quick connection mechanisms are prone to loosen, and in severe cases may even completely fall off. The instability of the connection structure not only affects the normal function of the valve, but also may cause a series of serious consequences. First, the loosening of the connection between the valve body and the valve seat may cause sealing failure and gas leakage, which not only reduces system efficiency and wastes energy, but also may cause safety hazards in some application scenarios. Secondly, unstable connection may cause small changes in valve core position, affecting the precise control of the valve. Finally, if the connection completely fails, it may cause the valve to suddenly lose control, causing emergency shutdown of the entire system, resulting in significant economic losses and safety risks. SUMMARY

[0005] (I) Technical problems solved

[0006] The air control valve with the valve core convenient to replace solves the technical problems mentioned in the background art.

[0007] (II) Technical solutions

[0008] To achieve the above object, the utility model provides the following technical scheme: an air control valve with a valve core convenient to replace, including the valve body, the valve body downside is detachable and is equipped with the valve seat, the valve body is provided with quick change device, quick change device includes quick change lever, quick change sleeve, outside sleeve, quick change frame, quick change groove, movable block, inside sleeve, control sleeve, cooperation groove and cooperation block, quick change sleeve is detachable and is equipped with outside quick change lever, the outside sleeve and inside sleeve all are equipped with outside quick change sleeve, quick change frame passes through quick change sleeve side wall and is clamped into quick change groove, quick change groove is opened outside quick change lever, movable block is fixedly connected in quick change frame one side, and movable block is outside inside sleeve, control sleeve rotatory sleeve is equipped outside quick change sleeve, cooperation groove is helical and is opened in the outer wall of inside sleeve, a plurality of cooperation block is fixedly set in the inner wall of inside sleeve, and cooperation block slides along cooperation groove, quick change sleeve outside is provided with locking mechanism, locking mechanism includes linkage block, rotary block, linkage hole, linkage rod, linkage spring, rotary groove, rotary plate, locking plate and locking sleeve, linkage block is fixedly installed outside quick change sleeve, rotary block is fixedly connected in rotary plate one side, linkage hole is through linkage block, linkage rod is fixedly connected in rotary block one side, and linkage rod one end is inserted into linkage hole, linkage spring is movably equipped outside linkage rod, rotary groove is opened on rotary plate, rotary plate rotatory sleeve is equipped outside quick change sleeve, three locking plates are set in locking sleeve one side, locking sleeve is set outside quick change sleeve.

[0009] The utility model further sets up that valve seat both sides are equipped with the connecting pipe, the valve core is movably equipped in the valve seat, the valve core is detachably installed in valve body bottom end.

[0010] The utility model further sets up that the valve body and valve seat one side all are equipped with the sealing groove, the sealing ring is detachably equipped in sealing groove.

[0011] The utility model further sets up that the inside of quick change frame is equipped with movable spring, and the inner wall of quick change frame is connected with the outer wall of quick change sleeve through movable spring, and the one side of outside sleeve is equipped with guide block, and outside sleeve is fixedly connected with inside sleeve through guide block, and the outer side of quick change sleeve is equipped with guide groove, and the guide groove is adapted with guide block.

[0012] The utility model further sets up that the one side of locking sleeve is fixedly connected with longitudinal plate, and three locking plates are fixedly set in longitudinal plate one side, and the setting of longitudinal plate mainly realizes the connecting function between locking plate and locking sleeve.

[0013] The utility model further sets up, control the sleeve lateral wall slidingly is equipped with a plurality of locking rods, the quick change cover outside is equipped with a plurality of locking grooves, the control sleeve outside is equipped with conical spring, locking rod one end is connected with the control sleeve outer wall through conical spring, locking rod other end inserts into corresponding locking groove, the above-mentioned component has realized the accurate locking function of control sleeve.

[0014] The utility model further sets up, the locking sleeve inner wall is fixedly equipped with a sliding block, the quick change cover outside is equipped with a sliding slot, the sliding block is slidingly arranged in the sliding slot, and the cooperation of the sliding block and the sliding slot realizes the further limiting and guiding ability of the locking sleeve, and ensures the use stability of the locking sleeve.

[0015] The utility model further sets up, the locking sleeve one side is equipped with the spring, the spring other end and rotary plate are contact type connection, and the setting of spring simplifies operation and further strengthens structural stability.

[0016] (Three) beneficial effects

[0017] Compared with the prior art, the utility model provides a pneumatic control valve convenient for replacing valve core has the following beneficial effects:

[0018] 1, the quick change device's design cleverly solved the traditional pneumatic control valve when replacing valve core, through quick change lever, quick change cover, outside cover, inside cover and control sleeve's accurate cooperation, realized the quick connection and separation between valve body and valve seat, the plug-in design of quick change frame and quick change slot provides the preliminary fixation, and the spiral structure design of movable block, inside cover and cooperation groove realizes the accurate control of connection, and the rotary operation of control sleeve is through the sliding of cooperation block in cooperation groove, drives inside cover and outside cover to carry out accurate displacement, thereby realizes the locking or release of quick change frame, this design not only greatly simplifies the valve core replacement process, improves the operation convenience, and the design of movable spring guarantees the reset ability of quick change frame, guarantees the reliability of device, and the cooperation of guide block and guide groove improves the movement precision between components, guarantees the synchronous movement of inside cover and outside cover, and this efficient and reliable quick change mechanism greatly improves the efficiency of pneumatic control valve in the maintenance process, so that maintenance personnel can quickly complete valve core replacement in the narrow installation environment.

[0019] 2、The locking mechanism is constructed by the ingenious cooperation of the linkage block, the rotating block, the linkage rod and the rotating plate and the like components, a multiple protection system is constructed, the stability and the reliability of the quick change device are further enhanced, the rotation design of the rotating block cooperates with the limiting of the linkage hole and the linkage rod, the accurate control of the locking state is realized, the sliding mechanism of the locking sleeve is combined with the elastic support of the spring, and the longitudinal plate and the locking plate are used in cooperation, and the limiting of the locking sleeve by the sliding block and the sliding groove is cooperated, the locking function of the locking sleeve is provided, the influence of external impact on the connecting structure is effectively reduced, the cooperation design of the locking rod and the locking groove and the application of the conical spring further enhance the anti-vibration ability of the whole system, the accurate locking of the control sleeve is realized, this multiple locking mechanism effectively prevents the loosening or falling of the connecting components in the high pressure or high frequency operation environment, greatly improves the stability and safety of the pneumatic control valve in various use environments, the innovative design of the locking mechanism not only solves the instability problem of the quick connecting mechanism, but also provides the user with a safer and more reliable use experience, so that the pneumatic control valve can continuously exert its control function under various working conditions, and the maintenance convenience and long-term reliability of the system are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of the pneumatic control valve convenient to replace the valve core in the utility model;

[0021] Figure 2 It is the sectional structure schematic diagram in the utility model;

[0022] Figure 3 It is the structure schematic diagram of the quick change sleeve part in the utility model;

[0023] Figure 4 It is the sectional structure schematic diagram of the quick change sleeve and the quick change rod part in the utility model;

[0024] Figure 5 It is the sectional structure schematic diagram of the quick change sleeve and the quick change rod part in the utility model at the second angle;

[0025] Figure 6 It is the dispersion structure schematic diagram of the control sleeve and the inside sleeve part in the utility model.

[0026] In the figure: 1, valve body; 2, valve seat; 3, quick change rod; 4, quick change sleeve; 5, outer sleeve; 6, quick change frame; 7, quick change slot; 8, movable block; 9, inner sleeve; 10, control sleeve; 11, matching groove; 12, matching block; 13, linkage block; 14, rotating block; 15, linkage hole; 16, linkage rod; 17, linkage spring; 18, rotating groove; 19, rotating plate; 20, locking plate; 21, locking sleeve; 22, connecting pipe; 23, valve core; 24, sealing groove; 25, sealing ring; 26, movable spring; 27, guide block; 28, guide groove; 29, vertical plate; 30, locking rod; 31, locking groove; 32, conical spring; 33, sliding block; 34, sliding groove; 35, spring. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0029] In the present application, unless otherwise specified, the directions used such as "up, down" are generally with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravitational direction; similarly, for the convenience of understanding and description, "left, right" are generally with respect to the left and right shown in the drawings; "inner, outer" refer to the inner and outer with respect to the contour of each component itself, but the above directional words are not used to limit the present application.

[0030] Please refer to Figures 1-6The utility model provides a pneumatic valve convenient for replacing valve core, including valve body 1, the lower side of valve body 1 is detachably equipped with valve seat 2, and the upper side of valve body 1 is provided with quick change device, and quick change device includes quick change rod 3, quick change sleeve 4, outside sleeve 5, quick change frame 6, quick change groove 7, movable block 8, inside sleeve 9, control sleeve 10, cooperation groove 11 and cooperation block 12, quick change sleeve 4 is detachably equipped in the outside of quick change rod 3, and outside sleeve 5 and inside sleeve 9 are both equipped in the outside of quick change sleeve 4, and quick change frame 6 passes through the lateral wall of quick change sleeve 4 and is clamped into quick change groove 7, and quick change groove 7 is opened in the outside of quick change rod 3, and movable block 8 is fixedly connected on one side of quick change frame 6, and movable block 8 is at the outside of inside sleeve 9, control sleeve 10 is rotatably equipped in the outside of quick change sleeve 4, cooperation groove 11 is spirally opened in the outer wall of inside sleeve 9, and multiple cooperation blocks 12 are fixedly arranged on the inner wall of inside sleeve 9, and cooperation block 12 slides along cooperation groove 11, and quick change sleeve 4 is provided with locking mechanism outside, and locking mechanism includes linkage block 13, rotating block 14, linkage hole 15, linkage rod 16, linkage spring 17, rotating groove 18, rotating plate 19, locking plate 20 and locking sleeve 21, linkage block 13 is fixedly installed in the outside of quick change sleeve 4, rotating block 14 is fixedly connected on one side of rotating plate 19, linkage hole 15 penetrates linkage block 13, linkage rod 16 is fixedly connected on one side of rotating block 14, and one end of linkage rod 16 passes into linkage hole 15, linkage spring 17 is movably equipped in the outside of linkage rod 16, rotating groove 18 is opened on rotating plate 19, rotating plate 19 is rotatably equipped in the outside of quick change sleeve 4, three locking plates 20 are arranged on one side of locking sleeve 21, and locking sleeve 21 is arranged in the outside of quick change sleeve 4.

[0031] The utility model provides a pneumatic valve convenient for replacing valve core, including valve body 1, the lower side of valve body 1 is detachably equipped with valve seat 2, and the upper side of valve body 1 is provided with quick change device, and quick change device includes quick change rod 3, quick change sleeve 4, outside sleeve 5, quick change frame 6, quick change groove 7, movable block 8, inside sleeve 9, control sleeve 10, cooperation groove 11 and cooperation block 12, quick change sleeve 4 is detachably equipped in the outside of quick change rod 3, and outside sleeve 5 and inside sleeve 9 are both equipped in the outside of quick change sleeve 4, and quick change frame 6 passes through the lateral wall of quick change sleeve 4 and is clamped into quick change groove 7, and quick change groove 7 is opened in the outside of quick change rod 3, and movable block 8 is fixedly connected on one side of quick change frame 6, and movable block 8 is at the outside of inside sleeve 9, control sleeve 10 is rotatably equipped in the outside of quick change sleeve 4, cooperation groove 11 is spirally opened in the outer wall of inside sleeve 9, and multiple cooperation blocks 12 are fixedly arranged on the inner wall of inside sleeve 9, and cooperation block 12 slides along cooperation groove 11, and quick change sleeve 4 is provided with locking mechanism outside, and locking mechanism includes linkage block 13, rotating block 14, linkage hole 15, linkage rod 16, linkage spring 17, rotating groove 18, rotating plate 19, locking plate 20 and locking sleeve 21, linkage block 13 is fixedly installed in the outside of quick change sleeve 4, rotating block 14 is fixedly connected on one side of rotating plate 19, linkage hole 15 penetrates linkage block 13, linkage rod 16 is fixedly connected on one side of rotating block 14, and one end of linkage rod 16 passes into linkage hole 15, linkage spring 17 is movably equipped in the outside of linkage rod 16, rotating groove 18 is opened on rotating plate 19, rotating plate 19 is rotatably equipped in the outside of quick change sleeve 4, three locking plates 20 are arranged on one side of locking sleeve 21, and locking sleeve 21 is arranged in the outside of quick change sleeve 4.

[0032] The utility model provides a pneumatic valve convenient for replacing valve core, including valve body 1, the lower side of valve body 1 is detachably equipped with valve seat 2, and the upper side of valve body 1 is provided with quick change device, and quick change device includes quick change rod 3, quick change sleeve 4, outside sleeve 5, quick change frame 6, quick change groove 7, movable block 8, inside sleeve 9, control sleeve 10, cooperation groove 11 and cooperation block 12, quick change sleeve 4 is detachably equipped in the outside of quick change rod 3, and outside sleeve 5 and inside sleeve 9 are both equipped in the outside of quick change sleeve 4, and quick change frame 6 passes through the lateral wall of quick change sleeve 4 and is clamped into quick change groove 7, and quick change groove 7 is opened in the outside of quick change rod 3, and movable block 8 is fixedly connected on one side of quick change frame 6, and movable block 8 is at the outside of inside sleeve 9, control sleeve 10 is rotatably equipped in the outside of quick change sleeve 4, cooperation groove 11 is spirally opened in the outer wall of inside sleeve 9, and multiple cooperation blocks 12 are fixedly arranged on the inner wall of inside sleeve 9, and cooperation block 12 slides along cooperation groove 11, and quick change sleeve 4 is provided with locking mechanism outside, and locking mechanism includes linkage block 13, rotating block 14, linkage hole 15, linkage rod 16, linkage spring 17, rotating groove 18, rotating plate 19, locking plate 20 and locking sleeve 21, linkage block 13 is fixedly installed in the outside of quick change sleeve 4, rotating block 14 is fixedly connected on one side of rotating plate 19, linkage hole 15 penetrates linkage block 13, linkage rod 16 is fixedly connected on one side of rotating block 14, and one end of linkage rod 16 passes into linkage hole 15, linkage spring 17 is movably equipped in the outside of linkage rod 16, rotating groove 18 is opened on rotating plate 19, rotating plate 19 is rotatably equipped in the outside of quick change sleeve 4, three locking plates 20 are arranged on one side of locking sleeve 21, and locking sleeve 21 is arranged in the outside of quick change sleeve 4.

[0033] In this embodiment, when the valve core 23 needs to be removed, first rotate the rotating block 14, the rotating block 14 drives the linkage rod 16 arranged on one side to rotate along the linkage hole 15 in the linkage block 13, and the rotating block 14 will cooperate with the linkage block 13 to extrude the linkage spring 17 arranged outside the sleeve 5 of the linkage rod 16, at the same time, the rotating block 14 will drive the rotating groove 18 through the rotating plate 19 to rotate, when the rotating groove 18 rotates to the position corresponding to the locking plate 20, the locking sleeve 21 is pushed, the locking sleeve 21 drives the sliding block 33 arranged on the inside to slide along the sliding groove 34, and the locking sleeve 21 will drive the three locking plates 20 through the vertical plate 29 to slide, then two of the locking plates 20 will pass through the rotating groove 18 in turn, at the same time, the locking sleeve 21 will extrude the spring 35 in cooperation with the rotating plate 19, when the spring 35 is extruded to the limit, the locking plate 20 close to the locking sleeve 21 side just passes through the rotating groove 18 and moves to the other side of the rotating plate 19, at this time, the rotating block 14 is loosened, the linkage spring 17 pushes the rotating block 14 to rotate and reset, then the rotating block 14 drives the linkage rod 16 and the rotating plate 19 to rotate and reset, then the rotating plate 19 drives the rotating groove 18 to rotate and reset to the position not corresponding to the locking plate 20, at this time, the vertical plate 29 cooperates with the corresponding locking plate 20 to limit the locking sleeve 21 to one side of the rotating plate 19, so that the locking sleeve 21 no longer limits the locking rod 30, then the control sleeve 10 is turned positively, the control sleeve 10 drives the multiple locking rods 30 arranged on the side wall to move, then the locking groove 31 inner wall extrudes one end of the locking rod 30, because of the round corner design of the locking groove 31 inner wall edge and the end of the locking rod 30, and the locking rod 30 is slidably arranged in the side wall of the control sleeve 10, then one end of the locking rod 30 slides out of the locking groove 31, and the other end of the locking rod 30 drives the conical spring 32 to stretch, at the same time, the control sleeve 10 drives the cooperation block 12 arranged on the inside to rotate, then the cooperation block 12 slides along the cooperation groove 11 of the spiral structure, because the guide block 27 and the guide groove 28 cooperate to limit the inside sleeve 9, the inside sleeve 9 cannot rotate, then the inside sleeve 9 drives the outside sleeve 5 to slide along the guide groove 28 through the guide block 27, then the inner wall of the outside sleeve 5 no longer limits the outer wall of the quick change frame 6, and the outer wall of the inside sleeve 9 gradually pushes the movable block 8 outward, then the movable block 8 drives one end of the quick change frame 6 to gradually pull out of the quick change slot 7, and the quick change frame 6 gradually drives the movable spring 26 to stretch, when one end of the quick change frame 6 completely separates from the quick change slot 7, the quick change sleeve 4 and the quick change rod 3 are pulled up and down respectively, the quick change sleeve 4 and the quick change rod 3 are removed, then the valve body 1 is taken off from the valve seat 2, and then the valve core 23 is taken out from the valve seat 2 and disassembled.

[0034] Please refer to Figures 2-6As a further embodiment of the whole device: the inside of the quick-change frame 6 is provided with a movable spring 26, the inner wall of the quick-change frame 6 is connected with the outer wall of the quick-change sleeve 4 through the movable spring 26, one side of the outer sleeve 5 is connected with a guide block 27, the outer sleeve 5 is fixedly connected with the inner sleeve 9 through the guide block 27, the outer side of the quick-change sleeve 4 is provided with a guide groove 28, and the guide groove 28 is matched with the guide block 27.

[0035] The longitudinal plate 29 is fixedly connected on one side of the locking sleeve 21, and the three locking plates 20 are fixedly arranged on one side of the longitudinal plate 29.

[0036] The side wall of the control sleeve 10 is slidably provided with a plurality of locking rods 30, the outer side of the quick-change sleeve 4 is provided with a plurality of locking grooves 31, the outer side of the control sleeve 10 is provided with a conical spring 32, one end of the locking rod 30 is connected with the outer wall of the control sleeve 10 through the conical spring 32, and the other end of the locking rod 30 is inserted into the corresponding locking groove 31.

[0037] The inner wall of the locking sleeve 21 is fixedly provided with a sliding block 33, the outer side of the quick-change sleeve 4 is provided with a sliding groove 34, and the sliding block 33 is slidably arranged in the sliding groove 34.

[0038] The locking sleeve 21 is connected on one side with a spring 35, and the other end of the spring 35 is in contact with the rotating plate 19.

[0039] More specifically, when the valve core 23 needs to be replaced after replacement, first make the valve core 23 in the valve seat 2, and make the valve body 1 and the valve seat 2 connected together, at the same time make the sealing groove 24 and the sealing ring 25 in the valve body 1 and the valve seat 2 inside tight, the sealing groove 24 and the sealing ring 25 are arranged to ensure the sealing of the connection, then the quick change rod 3 is passed through the hole of the valve seat 2 and the valve body 1 from the lower side, then the quick change sleeve 4 is sleeved to the quick change rod 3 from the upper side of the valve body 1, then the control sleeve 10 is rotated reversely, the control sleeve 10 drives the matching block 12 arranged on the inner wall to move reversely, and the control sleeve 10 drives the locking rod 30 to move, then the inner sleeve 9 is reset reversely through the cooperation of the matching block 12 and the matching groove 11, then the inner sleeve 9 drives the guide block 27 and the outer sleeve 5 to slide reset, in this process, the inner sleeve 9 no longer limits the movement of the movable block 8, then the movable spring 26 drives the quick change frame 6 and the movable block 8 to slide reset, so that the quick change frame 6 gradually inserts into the quick change slot 7, at the same time, the inner wall of the outer sleeve 5 gradually limits the outer side of the quick change frame 6, when the quick change frame 6 is completely inserted into the quick change slot 7, the control sleeve 10 is no longer rotated, and the tapered spring 32 drives the locking rod 30 to reset and insert into the original locking groove 31, then the rotating block 14 is rotated again, so that the rotating block 14 drives the linkage rod 16 and the rotating plate 19 to move again, the linkage rod 16 rotates along the linkage hole 15, and the rotating block 14 and the linkage block 13 cooperate to press the linkage spring 17, at the same time, the rotating plate 19 drives the rotating groove 18 to rotate, when the rotating groove 18 moves to the position corresponding to the locking plate 20 again, the spring 35 pushes the locking sleeve 21 to slide reset, the locking sleeve 21 drives the sliding block 33 to reset along the sliding groove 34, and the locking sleeve 21 drives the locking plate 20 to slide reset through the vertical plate 29, when the spring 35 is completely reset, the other two locking plates 20 move to the two sides of the rotating plate 19 respectively, then the rotating block 14 is loosened, the linkage spring 17 pushes the rotating block 14 to rotate reset again, then the rotating block 14 drives the rotating plate 19 and the linkage rod 16 to rotate reset, then the rotating plate 19 drives the rotating groove 18 to rotate reset to the position not corresponding to the locking plate 20, then the vertical plate 29 and the two locking plates 20 cooperate to limit the locking sleeve 21 to one side of the rotating plate 19, so that the inner wall of the locking sleeve 21 limits the outer end of the locking rod 30 again, so that the locking rod 30 and the locking groove 31 cooperate to lock the control sleeve 10, so that the control sleeve 10 cannot move, preventing the device from being unlocked accidentally, ensuring the stable use of the pneumatic control valve.

[0040] In summary, when the valve core 23 needs to be removed, first rotate the rotating block 14, the rotating block 14 drives the linkage rod 16 arranged on one side to rotate along the linkage hole 15 in the linkage block 13, and the rotating block 14 will cooperate with the linkage block 13 to extrude the linkage spring 17 arranged outside the linkage rod 16, at the same time, the rotating block 14 will drive the rotating groove 18 through the rotating plate 19, when the rotating groove 18 rotates to the position corresponding to the locking plate 20, the locking sleeve 21 is pushed, the locking sleeve 21 drives the sliding block 33 arranged inside to slide along the sliding groove 34, and the locking sleeve 21 will drive the three locking plates 20 through the vertical plate 29 to slide, then two of the three locking plates 20 will pass through the rotating groove 18 in turn, at the same time, the locking sleeve 21 will cooperate with the rotating plate 19 to extrude the spring 35, when the spring 35 is extruded to the limit, the locking plate 20 close to the locking sleeve 21 side just passes through the rotating groove 18 and moves to the other side of the rotating plate 19, at this time, the rotating block 14 is loosened, the linkage spring 17 pushes the rotating block 14 to rotate and reset, then the rotating block 14 drives the linkage rod 16 and the rotating plate 19 to rotate and reset, then the rotating plate 19 drives the rotating groove 18 to rotate and reset to the position not corresponding to the locking plate 20, at this time, the vertical plate 29 cooperates with the corresponding locking plate 20 to limit the locking sleeve 21 to one side of the rotating plate 19, so that the locking sleeve 21 no longer limits the locking rod 30, then the control sleeve 10 is rotated in the positive direction, the control sleeve 10 drives the plurality of locking rods 30 arranged on the side wall to move, then the locking groove 31 inner wall extrudes one end of the locking rod 30, due to the design of the round corner of the locking groove 31 inner wall edge and the end of the locking rod 30, and the sliding arrangement of the locking rod 30 in the control sleeve 10 side wall, then one end of the locking rod 30 slides out of the locking groove 31, and the other end of the locking rod 30 drives the conical spring 32 to stretch, at the same time, the control sleeve 10 drives the cooperation block 12 arranged inside to rotate, then the cooperation block 12 slides along the cooperation groove 11 with spiral structure, due to the cooperation of the guide block 27 and the guide groove 28 to limit the inside sleeve 9, the inside sleeve 9 cannot rotate, then the inside sleeve 9 drives the outside sleeve 5 to slide along the guide groove 28 through the guide block 27, then the inner wall of the outside sleeve 5 no longer limits the outer wall of the quick change frame 6, and the outer wall of the inside sleeve 9 gradually pushes the movable block 8 outward, then the movable block 8 drives one end of the quick change frame 6 to gradually pull out of the quick change slot 7, and the quick change frame 6 gradually drives the movable spring 26 to stretch, when one end of the quick change frame 6 completely separates from the quick change slot 7, the quick change sleeve 4 and the quick change rod 3 are pulled up and down respectively, the quick change sleeve 4 and the quick change rod 3 are removed, then the valve body 1 is taken off from the valve seat 2, and then the valve core 23 is taken out from the valve seat 2.

[0041] When the valve core 23 needs to be replaced after replacement, first make the valve core 23 in the valve seat 2, and make the valve body 1 and the valve seat 2 connected together, and the sealing groove 24 and the sealing ring 25 in the valve body 1 and the valve seat 2 are pressed tightly, the sealing groove 24 and the sealing ring 25 are arranged to ensure the sealing of the connection, then the quick change rod 3 is inserted from the lower side through the hole of the valve seat 2 and the valve body 1, then the quick change sleeve 4 is inserted from the upper side of the valve body 1 to the outer side of the quick change rod 3, then the control sleeve 10 is rotated in reverse, the control sleeve 10 drives the matching block 12 arranged on the inner wall to move in reverse, and the control sleeve 10 drives the locking rod 30 to move, then the inner sleeve 9 is reset by the cooperation of the matching block 12 and the matching groove 11, then the inner sleeve 9 drives the guide block 27 and the outer sleeve 5 to slide reset, in this process, the inner sleeve 9 no longer limits the movement of the block 8, then the movable spring 26 drives the quick change frame 6 and the movable block 8 to slide reset, so that the quick change frame 6 gradually inserts into the quick change slot 7, and the outer sleeve 5 gradually limits the outer side of the quick change frame 6, when the quick change frame 6 is completely inserted into the quick change slot 7, the control sleeve 10 is no longer rotated, and the conical spring 32 drives the locking rod 30 to reset and insert into the original locking slot 31, then the rotating block 14 is rotated again, so that the rotating block 14 drives the linkage rod 16 and the rotating plate 19 to move again, the linkage rod 16 rotates along the linkage hole 15, and the rotating block 14 and the linkage block 13 cooperate to press the linkage spring 17, and the rotating plate 19 drives the rotating slot 18 to rotate, when the rotating slot 18 moves to the position corresponding to the locking plate 20 again, the spring 35 pushes the locking sleeve 21 to slide reset, the locking sleeve 21 drives the sliding block 33 to reset along the sliding groove 34, and the locking sleeve 21 drives the locking plate 20 to slide reset through the vertical plate 29, when the spring 35 is completely reset, the other two locking plates 20 move to the two sides of the rotating plate 19 respectively, then the rotating block 14 is released, the linkage spring 17 pushes the rotating block 14 to rotate reset again, then the rotating block 14 drives the rotating plate 19 and the linkage rod 16 to rotate reset, then the rotating plate 19 drives the rotating slot 18 to rotate reset to the position not corresponding to the locking plate 20, then the vertical plate 29 and the two locking plates 20 cooperate to limit the locking sleeve 21 to one side of the rotating plate 19, so that the inner wall of the locking sleeve 21 limits the outer end of the locking rod 30 again, so that the locking rod 30 and the locking slot 31 cooperate to lock the control sleeve 10, so that the control sleeve 10 cannot move, preventing the device from being unlocked accidentally, ensuring the stable use of the pneumatic control valve.

[0042] In all the above-mentioned solutions, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection or other known connection mode, which will not be described here. In the above, whenever there is a fixed connection, welding is preferred. Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic control valve with a valve core convenient to replace, comprising a valve body (1), the lower side of the valve body (1) is provided with a valve seat (2), characterized in that: The valve body (1) is provided with a quick change device, the quick change device includes a quick change rod (3), a quick change sleeve (4), an outer sleeve (5), a quick change frame (6), a quick change groove (7), a movable block (8), an inner sleeve (9), a control sleeve (10), a matching groove (11) and a matching block (12), the outer sleeve (5) and the inner sleeve (9) are both sleeved outside the quick change sleeve (4), the quick change groove (7) is opened outside the quick change rod (3), the movable block (8) is connected on one side of the quick change frame (6), the matching groove (11) is helically opened on the outer wall of the inner sleeve (9), the matching block (12) is arranged on the inner wall of the inner sleeve (9), a locking mechanism is arranged outside the quick change sleeve (4), the locking mechanism includes a linkage block (13), a rotating block (14), a linkage hole (15), a linkage rod (16), a linkage spring (17), a rotating groove (18), a rotating plate (19), a locking plate (20) and a locking sleeve (21), the linkage hole (15) penetrates through the linkage block (13), the linkage rod (16) is connected on one side of the rotating block (14), the linkage spring (17) is sleeved outside the linkage rod (16), the rotating groove (18) is opened on the rotating plate (19), the locking plate (20) is arranged on one side of the locking sleeve (21), and the locking sleeve (21) is arranged outside the quick change sleeve (4).

2. The gas control valve of claim 1, wherein: The valve seat (2) is fixedly provided with a connecting pipe (22) on both sides, and a valve core (23) is movably arranged in the valve seat (2), and the valve core (23) is detachably installed at the bottom end of the valve body (1).

3. The gas control valve of claim 2, wherein: The valve body (1) and the valve seat (2) are both provided with a sealing groove (24) on one side, and a sealing ring (25) is detachably arranged in the sealing groove (24).

4. The gas control valve of claim 1, wherein: The quick change frame (6) is provided with a movable spring (26) on the inner side, the inner wall of the quick change frame (6) is connected with the outer wall of the quick change sleeve (4) through the movable spring (26), one side of the outer sleeve (5) is connected with a guide block (27), the outer sleeve (5) is fixedly connected with the inner sleeve (9) through the guide block (27), and a guide groove (28) is formed in the outer side of the quick change sleeve (4), and the guide groove (28) is matched with the guide block (27).

5. A gas control valve with a cartridge that is easy to replace according to any one of claims 1-4, characterized in that: The locking sleeve (21) is fixedly connected with a vertical plate (29) on one side, and the three locking plates (20) are fixedly arranged on one side of the vertical plate (29).

6. The gas control valve of claim 5 wherein: A plurality of locking rods (30) are slidably arranged on the side wall of the control sleeve (10), a plurality of locking grooves (31) are formed in the outer side of the quick change sleeve (4), a conical spring (32) is arranged on the outer side of the control sleeve (10), one end of the locking rod (30) is connected with the outer wall of the control sleeve (10) through the conical spring (32), and the other end of the locking rod (30) is inserted into the corresponding locking groove (31).

7. The gas control valve of claim 6, wherein: A sliding block (33) is fixedly arranged on the inner wall of the locking sleeve (21), and a sliding groove (34) is formed in the outer side of the quick change sleeve (4).

8. The gas control valve of claim 7, wherein: The locking sleeve (21) is connected with a spring (35) on one side, and the other end of the spring (35) is connected with the rotating plate (19) in a contact mode.

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