A maintenance-free large-bore corrugated pipe stop valve

Abstract

The application discloses a kind of maintenance-free large-bore corrugated pipe stop valve, it is related to stop valve technical field, including large-bore stop valve body, valve body sealing end cover and bonnet mounting rack, the inside of the bonnet mounting rack is installed with valve stem, the outside of the valve stem is installed with corrugated sleeve, the connecting edge frame is symmetrically installed on the outside of stop valve clack, the fixed round rod is symmetrically installed on the middle bottom wall of large-bore stop valve body.The application is provided with wear-preventing assembly on the inside of large-bore stop valve body, when valve stem rotates and drives stop valve clack to descend, corrugated sleeve is stretched under stress, connecting edge frame is stably slid on the outside of fixed round rod, when corrugated sleeve is stretched under stress during the use of corrugated pipe stop valve, it is stably stretched under the driving action of connecting edge frame, the degree of damage of corrugated sleeve is reduced, the service life of corrugated sleeve is prolonged, and the good use performance of corrugated pipe stop valve is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stop valves, in particular to a maintenance-free large-diameter corrugated pipe stop valve. BACKGROUND

[0002] The corrugated pipe stop valve is one of the corrugated pipe sealing valves, and belongs to a non-forced sealing valve. The corrugated pipe stop valve plays a role of cutting off or connecting a medium, adjusting a medium quantity, and changing a medium flow direction in a pipeline system. When the medium in the pipeline is solid particles, has a large viscosity, and is easy to coking, the corrugated pipe stop valve with a device for preventing metal hard scale adhesion is preferably used. The corrugated pipe stop valve is suitable for pipelines of steam, flammable, explosive, heat-conducting oil, high-purity, toxic and other media.

[0003] The defects of the corrugated pipe stop valve in the prior art are as follows:

[0004] 1. The patent document JP3196493U discloses a corrugated pipe valve. In the use process, the corrugated pipe is unevenly stretched and contracted under stress, which is easy to be damaged, shortens the service life of the corrugated pipe, and cannot guarantee the good use performance of the corrugated pipe valve.

[0005] 2. The patent document CN212616318U discloses a wear-resistant long-life corrugated pipe stop valve. The corrugated pipe stop valve only realizes static sealing between the valve body and the valve cover through the corrugated pipe, cannot guarantee the good sealing effect of the corrugated pipe stop valve, and needs to be frequently maintained.

[0006] 3. The patent document CN211875117U discloses a corrugated pipe stop valve with replaceable valve plate. In the use process, the valve rod cannot be uniformly lubricated, which is easy to cause jamming of the valve plate during opening and closing, and leads to poor use effect of the stop valve.

[0007] 4. The patent document CN216143191U discloses a manual corrugated pipe stop valve capable of removing impurities. The corrugated pipe stop valve adopts a traditional hand wheel transmission to operate the valve opening and closing, which is not convenient for the operator to operate, and the unbalanced hand wheel rotation is easy to cause the valve to be not tightly closed, thereby causing leakage. SUMMARY

[0008] The present application aims to provide a maintenance-free large-diameter corrugated pipe stop valve to solve the problems in the background art.

[0009] In order to achieve the above object, the present application provides the following technical scheme: a maintenance-free large-diameter corrugated pipe stop valve, comprising a large-diameter stop valve body, a valve body sealing end cover and a valve cover mounting rack, the top of the large-diameter stop valve body is provided with the valve body sealing end cover, the top of the valve body sealing end cover is provided with the valve cover mounting rack, the inner side of the valve cover mounting rack is provided with the valve rod, the output end of the valve rod is provided with a stop valve flap, the outer side of the valve rod is provided with a corrugated sleeve, and the bottom end of the corrugated sleeve is connected with the top of the stop valve flap.

[0010] The inner side of the large-diameter stop valve body is provided with an anti-wear assembly, the anti-wear assembly comprises a connecting edge frame and a fixed circular rod, the connecting edge frame is symmetrically installed on the outer side of the stop valve flap, the top of the connecting edge frame is provided with a sliding slot, and the fixed circular rod is symmetrically installed on the middle bottom wall of the large-diameter stop valve body.

[0011] Preferably, the bottom of the connecting edge frame is symmetrically provided with a bottom slot, a micro damper is installed on the inner wall of the bottom slot, a buffer spring is installed on the outer side of the micro damper, and the bottom end of the buffer spring is connected with a buffer impact pad.

[0012] Preferably, the top of the fixed circular rod is provided with an auxiliary push groove, a vertical push hand lever is installed on the bottom wall of the auxiliary push groove, a butt joint limiting block is installed at the extension end of the vertical push hand lever, a butt joint reinforcing groove is formed in the top of the large-diameter stop valve body, the butt joint limiting block is clamped on the inner side of the butt joint reinforcing groove, and an internal thread limiting ring is threadedly connected to the outer side of the top end of the fixed circular rod, and the internal thread limiting ring is matched with the connecting edge frame.

[0013] Preferably, the outer side of the valve rod is provided with a uniform lubricating assembly, the uniform lubricating assembly comprises a lubricating sleeve seat, the lubricating sleeve seat is installed on the outer side of the valve rod, a serpentine flow channel is formed in the inside of the lubricating sleeve seat, lubricating liquid adding ports are symmetrically formed in the top of the lubricating sleeve seat and are communicated with the serpentine flow channel, a sealing oil cover is installed on the inner side of the lubricating liquid adding port, a fitting groove is formed in the inner side of the lubricating sleeve seat, a permeation flow hole is formed in the inner wall of the fitting groove and is communicated with the serpentine flow channel.

[0014] Preferably, the outer side of the large-diameter stop valve body is provided with a medium flow pipeline, a connecting flange is installed on the outer end of the medium flow pipeline, sealing cavities are symmetrically formed in the top of the valve body sealing end cover, a limiting frame is installed on the inner side of the sealing cavity, and a pure graphite filler is placed in the inner side of the limiting frame.

[0015] Preferably, the top of the valve cover mounting frame is provided with a worm gear transmission assembly, the worm gear transmission assembly comprises a worm gear box, a worm and a transmission lower box, the worm is mounted on the inner wall of the worm gear box through a bearing, the transmission lower box is mounted at the bottom of the worm gear box, and the transmission lower box is connected with the top end of the valve cover mounting frame, a rotating disc shaft is mounted on the bottom wall of the transmission lower box, and the output end of the rotating disc shaft is connected with the top end of the valve rod, a transmission worm is mounted on the top end of the rotating disc shaft, and the transmission worm and the rotating disc shaft are in meshing transmission.

[0016] Preferably, a speed reducer is mounted on the outside of the worm gear box, and the output end of the speed reducer is connected with the input end of the worm, a driving motor is mounted on the outside of the speed reducer, a remote controller is mounted on the outside of the worm gear box, the remote controller comprises an adjusting driving module and a wireless receiving module, the adjusting driving module drives and controls the use process of the bellows stop valve, the adjusting driving module is electrically connected with the anti-wear assembly and the driving motor, and the wireless receiving module receives the output signal of the background transmission unit.

[0017] Preferably, the working steps of the bellows stop valve are as follows:

[0018] S1, when the large-diameter bellows stop valve is used, the external pipeline is butt-jointed with the connecting flange, after the installation is completed, the driving motor is operated, the driving motor rotates to drive the worm to rotate after being controlled by the speed reducer, the input kinetic energy is converted into output kinetic energy by the mutual meshing action of the worm and the transmission worm, power transmission and speed regulation are realized, the rotation of the transmission worm drives the valve rod to rotate, and the worm gear box is used to drive the opening and closing of the stop valve flap;

[0019] S2, when the valve rod rotates to drive the stop valve flap to descend, the bellows sleeve is stretched under stress, the connecting side frame stably slides outside the fixed circular rod, when the stop valve flap completely seals the large-diameter stop valve body, the buffer impact pad plate contacts the middle bottom wall of the large-diameter stop valve body and conducts the impact force to the buffer spring, the buffer spring cooperates with the micro damper to buffer the impact force, and the vibration damage of the stop valve flap caused by the impact is reduced;

[0020] S3, after the large-diameter bellows stop valve is used for a period of time, the sealing oil cover is opened, the lubricating oil is added through the lubricating liquid adding port, the added lubricating oil slowly flows downward through the meandering flow channel, the lubricating oil is shunted by the permeable flow hole during the flowing process, the lubricating oil in the meandering flow channel flows downward from top to bottom in turn and finally flows out from the permeable flow hole at the bottom end, and the lubricating oil flowing out from the multiple groups of permeable flow holes uniformly lubricates the outer surface of the valve rod through the fitting groove.

[0021] Preferably, in the step S2, the following steps are further included:

[0022] S21, when the stop valve flap of the large-diameter corrugated pipe stop valve is damaged during use, the remote controller controls the vertical push hand lever to work, the vertical push hand lever retracts to make the butt joint limiting block move downward to release the limiting of the inner side of the butt joint reinforcing groove, the valve body sealing end cover and the large-diameter stop valve body are disassembled, the internal thread limiting ring is rotated to be screwed out from the outside of the fixed circular rod, the sleeve connection between the connecting edge frame and the fixed circular rod is released, and then the stop valve flap is replaced.

[0023] Compared with the prior art, the beneficial effects of the present application are as follows:

[0024] 1, the inner side of the large-diameter stop valve body is provided with an anti-wear assembly, the valve stem rotates to drive the stop valve flap to descend, the corrugated sleeve is stretched under stress, the connecting edge frame stably slides outside the fixed circular rod, and when the stop valve flap completely seals the large-diameter stop valve body, the buffer impact pad contacts the middle bottom wall of the large-diameter stop valve body and transmits the impact force to the buffer spring, the buffer spring cooperates with the micro damper to buffer the impact force, reduces the vibration damage of the impact to the stop valve flap, and the corrugated sleeve stably shrinks and stretches under the driving action of the connecting edge frame when the corrugated sleeve is stretched under stress during use of the corrugated pipe stop valve, which uniformly reduces the damage degree of the corrugated sleeve, prolongs the service life of the corrugated sleeve and ensures the good use performance of the corrugated pipe stop valve.

[0025] 2, the outer side of the valve stem is provided with a corrugated sleeve, the lower end of the corrugated sleeve is connected with the valve stem, the other end is arranged between the valve body and the valve cover to form a static seal to form a double seal, and if the corrugated sleeve fails, the pure graphite filler can also avoid leakage, the corrugated sleeve is welded on the valve stem to maintain stable operation performance, avoid vibration of the valve stem caused by vibration of the valve flap, the valve stem is designed with external rolling threads, is provided with a stainless steel corrugated sleeve seal and a safety filler made of pure graphite, double sealing effectively prevents medium leakage while reducing the dependence on traditional filler sealing, the large-diameter stop valve body is suitable for large-diameter pipeline systems, so that the valve is more efficient when handling a large amount of fluid, reduces fluid resistance and energy loss, can meet the requirements of high flow and high pressure, and reduces the maintenance frequency of the corrugated pipe stop valve.

[0026] 3, the outer side of the valve stem is provided with a uniform lubricating assembly, lubricating oil is added through the lubricating liquid adding port, the added lubricating oil slowly flows downward through the tortuous flow channel, the lubricating oil is divided by the penetration flow hole during flow, the lubricating oil in the tortuous flow channel flows downward from top to bottom and finally flows out from the penetration flow hole at the bottom end, the lubricating oil flowing out through the multiple groups of penetration flow holes is uniformly lubricated on the outer surface of the valve stem through the fitting groove, the corrugated pipe stop valve can uniformly lubricate the valve stem during use, effectively avoids the jamming of the stop valve flap during opening and closing, and further improves the use effect of the corrugated pipe stop valve.

[0027] 4, The application sets the worm gear transmission assembly on the top of the valve cover mounting frame, drives the motor to rotate and drives the worm to rotate after the reducer control, utilizes the mutual meshing effect of the worm and the transmission worm gear to convert the input kinetic energy into the output kinetic energy, realizes the power transmission and the rotation speed adjustment, drives the valve rod to rotate by the rotation of the transmission worm gear, adopts the worm gear box transmission operation to open and close the stop valve, adopts the worm gear box transmission operation to open and close the valve, saves the labor and is light, solves the problem that the large-diameter valve leaks due to the unbalanced hand wheel rotation, and is suitable for the requirement of the national chemical equipment safety level improvement. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the three-dimensional structure schematic diagram of the application;

[0029] Figure 2 It is the front internal structure schematic diagram of the application;

[0030] Figure 3 It is the lubricating sleeve seat three-dimensional structure schematic diagram of the application;

[0031] Figure 4 It is the lubricating sleeve seat top internal structure schematic diagram of the application;

[0032] Figure 5 It is the lubricating sleeve seat front internal structure schematic diagram of the application;

[0033] Figure 6 It is the worm gear box front internal structure schematic diagram of the application;

[0034] Figure 7 It is the A enlarged structure schematic diagram of the application;

[0035] Figure 8 It is the fixed round rod structure schematic diagram of the application;

[0036] Figure 9 It is the remote controller system diagram of the application;

[0037] Figure 10 It is the work flow chart of the application.

[0038] In the figure: 1, large diameter stop valve body; 2, valve body sealing end cover; 3, valve cover mounting frame; 4, worm gear box; 5, lubricating sleeve; 6, stop valve clack; 7, fixed round rod; 8, medium flow pipeline; 9, connecting flange; 10, butt joint reinforcing groove; 11, sealing cavity; 12, limiting frame; 13, pure graphite filler; 14, valve stem; 15, corrugated sleeve; 16, remote controller; 17, speed reducer; 18, drive motor; 19, worm; 20, transmission lower box; 21, transmission worm gear; 22, rotating disc shaft; 23, serpentine flow channel; 24, lubricating liquid inlet; 25, sealing oil cover; 26, fitting groove; 27, permeable flow hole; 28, connecting edge frame; 29, sliding slot; 30, bottom slot; 31, micro damper; 32, buffer spring; 33, buffer impact pad; 34, auxiliary push groove; 35, vertical push hand lever; 36, butt joint limiting block; 37, internal thread limiting ring. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection or movable connection, can be detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] Please refer to Figure 2 and Figure 7 An embodiment provided by the present application is a maintenance-free large-diameter corrugated pipe stop valve.

[0043] The inner side of the large-diameter stop valve body 1 is provided with a wear-preventing assembly, the wear-preventing assembly comprises the connecting edge frame 28 and the fixed round rod 7, the connecting edge frame 28 is symmetrically installed on the outer side of the stop valve disc 6, the top of the connecting edge frame 28 is provided with a sliding slot 29, the fixed round rod 7 is symmetrically installed on the middle bottom wall of the large-diameter stop valve body 1, and the connecting edge frame 28 is sleeved on the outer side of the fixed round rod 7 through the sliding slot 29, the bottom of the connecting edge frame 28 is symmetrically provided with a bottom slot 30, a micro damper 31 is installed on the inner wall of the bottom slot 30, a buffer spring 32 is installed on the outer side of the micro damper 31, and the bottom end of the buffer spring 32 is connected with a buffer impact pad 33;

[0044] The connecting edge frame 28 is sleeved on the outer side of the fixed round rod 7 through the sliding slot 29, the corrugated sleeve 15 is stretched under stress when the valve rod 14 rotates to drive the stop valve disc 6 to descend, the connecting edge frame 28 stably slides on the outer side of the fixed round rod 7, the bottom slot 30 provides an installation position for the micro damper 31, the buffer impact pad 33 is in contact with the middle bottom wall of the large-diameter stop valve body 1 when the stop valve disc 6 completely seals the large-diameter stop valve body 1, and the impact force is transmitted to the buffer spring 32, the buffer spring 32 and the micro damper 31 cooperate to buffer the impact force, thereby reducing the vibration damage of the stop valve disc 6 caused by the impact, and the corrugated sleeve 15 is stably stretched and contracted under the driving action of the connecting edge frame 28 when the corrugated sleeve 15 is stretched and contracted under stress in the use process of the corrugated sleeve valve, thereby reducing the damage degree of the corrugated sleeve 15.

[0045] Please refer to Figure 2 , Figure 7 and Figure 8 , a maintenance-free large-diameter corrugated sleeve stop valve;

[0046] The inner side of the large-diameter stop valve body 1 is provided with a wear-preventing assembly, the wear-preventing assembly comprises the connecting edge frame 28 and the fixed round rod 7, the connecting edge frame 28 is sleeved on the outer side of the fixed round rod 7 through the sliding slot 29, the top of the fixed round rod 7 is provided with an auxiliary pushing groove 34, a vertical pushing hand rod 35 is installed on the bottom wall of the auxiliary pushing groove 34, the telescopic end of the vertical pushing hand rod 35 is installed with a butt joint limiting block 36, the top of the large-diameter stop valve body 1 is provided with a butt joint reinforcing groove 10, and the butt joint limiting block 36 is clamped on the inner side of the butt joint reinforcing groove 10, the top outer side of the fixed round rod 7 is connected with an internal thread limiting ring 37 through threads, and the internal thread limiting ring 37 cooperates with the connecting edge frame 28;

[0047] The auxiliary pushing groove 34 provides a mounting position for the vertical pushing handle 35 and ensures the stability of the vertical pushing handle 35 during operation. When the large-diameter stop valve body 1 is damaged, the remote controller 16 controls the operation of the vertical pushing handle 35, the vertical pushing handle 35 is retracted to move the butt joint limiting block 36 downward to release the limiting of the inner side of the butt joint reinforcing groove 10, the valve body sealing cover 2 is disassembled from the large-diameter stop valve body 1, the internal thread limiting ring 37 is rotated and screwed out from the outer side of the fixed circular rod 7, the connection between the connecting side frame 28 and the fixed circular rod 7 is released, and then the stop valve disc 6 is replaced, and finally the internal thread limiting ring 37 is installed.

[0048] Please refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 5 , a maintenance-free large-diameter corrugated pipe stop valve;

[0049] The valve stem 14 is provided with a uniform lubricating assembly on the outer side, the uniform lubricating assembly comprises a lubricating sleeve 5, the lubricating sleeve 5 is installed on the outer side of the valve stem 14, the inside of the lubricating sleeve 5 is provided with a serpentine flow channel 23, the top of the lubricating sleeve 5 is symmetrically provided with a lubricating liquid inlet 24, the lubricating liquid inlet 24 is in communication with the serpentine flow channel 23, the inside of the lubricating liquid inlet 24 is provided with a sealing oil cover 25, the inside of the lubricating sleeve 5 is provided with a fitting groove 26, the inner wall of the fitting groove 26 is provided with a permeable flow hole 27, and the permeable flow hole 27 is in communication with the serpentine flow channel 23;

[0050] The sealing oil cover 25 seals the lubricating liquid inlet 24 to prevent dust from entering, the lubricating oil is added through the lubricating liquid inlet 24, and the added lubricating oil slowly flows downward through the serpentine flow channel 23. During the flowing process, the lubricating oil is divided by the permeable flow hole 27 when flowing through the permeable flow hole 27, the lubricating oil in the serpentine flow channel 23 flows downward from top to bottom and finally flows out from the permeable flow hole 27 at the bottom end, and the lubricating oil flowing out through the multiple groups of permeable flow holes 27 uniformly lubricates the outer surface of the valve stem 14, which effectively avoids the jamming of the stop valve disc 6 during opening and closing.

[0051] Please refer to Figure 1 、 Figure 2 and Figure 9 , a maintenance-free large-diameter corrugated pipe stop valve;

[0052] The inner side of the valve cover mounting frame 3 is provided with a valve stem 14, the output end of the valve stem 14 is provided with a stop valve disc 6, the outer side of the valve stem 14 is provided with a corrugated sleeve 15, the bottom end of the corrugated sleeve 15 is connected with the top of the stop valve disc 6, the outer side of the large-diameter stop valve body 1 is provided with a medium flow pipeline 8, the outer end of the medium flow pipeline 8 is provided with a connecting flange 9, the top of the valve body sealing end cover 2 is symmetrically provided with a sealing cavity 11, the inner side of the sealing cavity 11 is provided with a limiting frame 12, the inner side of the limiting frame 12 is placed with pure graphite filler 13, the outer side of the worm gear box 4 is provided with a remote controller 16, the remote controller 16 is composed of an adjusting driving module and a wireless receiving module, the adjusting driving module drives and controls the use process of the corrugated pipe stop valve, the adjusting driving module is electrically connected with the anti-wear assembly and the driving motor 18, and the wireless receiving module receives the output signal of the background transmission unit.

[0053] The outer pipeline is connected with the large-diameter stop valve body 1 through the connecting flange 9, the lower end of the corrugated sleeve 15 is connected with the valve stem 14, the other end is placed between the valve body and the valve body sealing end cover 2 to form a static seal to form a double seal, the limiting frame 12 provides an installation position for the pure graphite filler 13, and if the corrugated sleeve 15 fails, the pure graphite filler 13 can also avoid leakage, the corrugated sleeve 15 is welded on the valve stem 14 to maintain stable operation performance, avoid vibration of the valve stem 14 caused by vibration of the stop valve disc 6, the valve stem 14 adopts an outer rolling thread design, is provided with a stainless steel corrugated sleeve 15 seal and a safety filler made of pure graphite, double sealing effectively prevents medium leakage while reducing the dependence on traditional filler sealing, the large-diameter stop valve body 1 is suitable for large-diameter pipeline systems, so that the valve is more efficient when handling a large amount of fluid, reduces fluid resistance and energy loss, and the remote controller 16 receives the output signal of the background transmission unit and controls the working state of the corrugated pipe stop valve.

[0054] Please refer to Figure 1 , Figure 2 and Figure 6 , a maintenance-free large-diameter corrugated pipe stop valve;

[0055] The valve cover mounting frame 3 is provided with a worm gear transmission assembly on the top, the worm gear transmission assembly comprises a worm gear box 4, a worm 19 and a transmission lower box 20, the worm 19 is installed on the inner wall of the worm gear box 4 through a bearing, the transmission lower box 20 is installed at the bottom of the worm gear box 4 and is connected with the top end of the valve cover mounting frame 3, a rotating disc shaft 22 is installed on the bottom wall of the transmission lower box 20 and the output end of the rotating disc shaft 22 is connected with the top end of the valve rod 14, a transmission worm 21 is installed at the top end of the rotating disc shaft 22 and the transmission worm 21 and the rotating disc shaft 22 are in meshing transmission with each other, a speed reducer 17 is installed on the outer side of the worm gear box 4 and the output end of the speed reducer 17 is connected with the input end of the worm 19, and a driving motor 18 is installed on the outer side of the speed reducer 17;

[0056] The driving motor 18 rotates and drives the worm 19 to rotate through the speed reducer 17, the input kinetic energy is converted into output kinetic energy through the meshing action of the worm 19 and the transmission worm 21, power transmission and speed regulation are realized, the rotation of the transmission worm 21 drives the valve rod 14 to rotate, and the rotating disc shaft 22 drives the valve rod 14, the opening and closing of the stop valve disc 6 are operated by the worm gear box, which is labor-saving and light, solves the problem of leakage caused by the unbalanced rotation of the hand wheel and the poor sealing of the large-diameter valve, meets the requirement of the improvement of the safety level of the chemical equipment, improves the pressure level and meets the requirement of the improvement of the valve diameter with the increase of the pipeline diameter of the chemical equipment.

[0057] The working steps of the corrugated pipe stop valve are as follows:

[0058] S1, when the large-diameter corrugated pipe stop valve is used, the external pipeline is connected with the connecting flange 9, after the installation is completed, the driving motor 18 is operated, the driving motor 18 rotates and drives the worm 19 to rotate through the speed reducer 17, the input kinetic energy is converted into output kinetic energy through the meshing action of the worm 19 and the transmission worm 21, power transmission and speed regulation are realized, the rotation of the transmission worm 21 drives the valve rod 14 to rotate, and the opening and closing of the stop valve disc 6 are operated by the worm gear box 4;

[0059] S2, when the valve rod 14 rotates and drives the stop valve disc 6 to descend, the corrugated sleeve 15 is stretched under the action of force, the connecting side frame 28 stably slides outside the fixed round rod 7, when the stop valve disc 6 completely seals the large-diameter stop valve body 1, the buffer impact pad 33 contacts the middle bottom wall of the large-diameter stop valve body 1 and transmits the impact force to the buffer spring 32, the buffer spring 32 cooperates with the micro damper 31 to buffer the impact force and reduce the vibration damage of the stop valve disc 6 caused by the impact;

[0060] S3, after the large-diameter corrugated pipe stop valve is used for a period of time, the sealing oil cover 25 is opened, the lubricating oil is added to the lubricating oil adding port 24, and the added lubricating oil slowly flows downward through the meandering flow channel 23. In the flowing process, the lubricating oil flows through the permeable flow hole 27 and is branched by the permeable flow hole 27. The lubricating oil in the meandering flow channel 23 flows downward from top to bottom and finally flows out from the bottommost permeable flow hole 27. The lubricating oil flowing out through the multiple groups of permeable flow holes 27 uniformly lubricates the outer surface of the valve rod 14 through the matching groove 26.

[0061] In step S2, the following steps are further included:

[0062] S21, when the stop valve disc 6 is damaged during the use of the large-diameter corrugated pipe stop valve, the remote controller 16 controls the vertical push hand lever 35 to work. The vertical push hand lever 35 is retracted to move the butt joint limiting block 36 downward to release the limiting with the inner side of the butt joint reinforcing groove 10. After the valve body sealing end cover 2 is disassembled from the large-diameter stop valve body 1, the internal thread limiting ring 37 is rotated to be screwed out from the outer side of the fixed circular rod 7. After the sleeve connection relationship between the connecting edge frame 28 and the fixed circular rod 7 is released, the stop valve disc 6 is replaced.

[0063] Working principle: when the device is used, the external pipeline is connected with the connecting flange 9 during the use of the large-diameter corrugated pipe stop valve. After the installation is completed, the driving motor 18 is operated. The driving motor 18 rotates to control the worm 19 to rotate through the speed reducer 17. The input kinetic energy is converted into output kinetic energy through the mutual meshing action of the worm 19 and the transmission worm 21, so as to realize power transmission and speed regulation. The rotation of the transmission worm 21 drives the valve rod 14 to rotate. The worm gear box 4 is used to drive the opening and closing of the stop valve disc 6.

[0064] When the valve rod 14 rotates to drive the stop valve disc 6 to descend, the corrugated sleeve 15 is stretched under stress. The connecting edge frame 28 stably slides outside the fixed circular rod 7. When the stop valve disc 6 completely seals the large-diameter stop valve body 1, the buffer impact pad 33 contacts the middle bottom wall of the large-diameter stop valve body 1 and transmits the impact force to the buffer spring 32. The buffer spring 32 cooperates with the micro damper 31 to buffer the impact force, reduce the vibration damage of the impact to the stop valve disc 6, and replace the stop valve disc 6 when it is damaged during the use of the large-diameter corrugated pipe stop valve. The remote controller 16 controls the vertical push hand lever 35 to work. The vertical push hand lever 35 is retracted to move the butt joint limiting block 36 downward to release the limiting with the inner side of the butt joint reinforcing groove 10. After the valve body sealing end cover 2 is disassembled from the large-diameter stop valve body 1, the internal thread limiting ring 37 is rotated to be screwed out from the outer side of the fixed circular rod 7. After the sleeve connection relationship between the connecting edge frame 28 and the fixed circular rod 7 is released, the stop valve disc 6 is replaced.

[0065] After the large-diameter corrugated pipe stop valve is used for a period of time, the sealing oil cover 25 is opened, the lubricating oil is added to the lubricating oil adding port 24, and the added lubricating oil slowly flows downward through the meandering flow channel 23. In the flowing process, the lubricating oil flows through the permeable flow hole 27 and is shunted by the permeable flow hole 27. The lubricating oil in the meandering flow channel 23 flows downward from top to bottom and finally flows out from the permeable flow hole 27 at the bottom end. The lubricating oil flowing out through the multiple groups of permeable flow holes 27 uniformly lubricates the outer surface of the valve rod 14 through the matching groove 26.

[0066] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims shall be construed as limiting the claim being referenced.

Claims

1. A maintenance-free large-diameter bellows gate valve, comprising a large-diameter gate valve body (1), a valve body sealing end cap (2), and a valve cover mounting bracket (3), characterized in that: The large-diameter shut-off valve body (1) is equipped with a valve body sealing end cap (2) on top, and a valve cover mounting bracket (3) is installed on top of the valve body sealing end cap (2). A valve stem (14) is installed through the inner side of the valve cover mounting bracket (3). A shut-off valve disc (6) is installed at the output end of the valve stem (14). A corrugated sleeve (15) is installed on the outer side of the valve stem (14), and the bottom end of the corrugated sleeve (15) is connected to the top of the shut-off valve disc (6). The inner side of the large-diameter shut-off valve body (1) is provided with an anti-wear component. The anti-wear component includes a connecting side frame (28) and a fixed round rod (7). The connecting side frame (28) is symmetrically installed on the outer side of the shut-off valve disc (6). A sliding slot (29) is provided through the top of the connecting side frame (28). The fixed round rod (7) is symmetrically installed on the bottom wall of the middle part of the large-diameter shut-off valve body (1). The connecting side frame (28) is sleeved on the outer side of the fixed round rod (7) through the sliding slot (29). The bottom of the connecting frame (28) is symmetrically provided with bottom slots (30), a micro damper (31) is installed on the inner wall of the bottom slot (30), a buffer spring (32) is installed on the outer side of the micro damper (31), and a buffer collision pad (33) is connected to the bottom end of the buffer spring (32). The top of the fixed round rod (7) is provided with an auxiliary push groove (34), and a vertical push handle (35) is installed on the bottom wall of the auxiliary push groove (34). A docking limit block (36) is installed at the telescopic end of the vertical push handle (35). A docking reinforcement groove (10) is provided on the top of the large-diameter shut-off valve body (1), and the docking limit block (36) is snapped into the inner side of the docking reinforcement groove (10). An internal thread limit ring (37) is threadedly connected to the outer side of the top of the fixed round rod (7), and the internal thread limit ring (37) cooperates with the connecting side frame (28).

2. The maintenance-free large-diameter bellows gate valve according to claim 1, characterized in that: A uniform lubrication assembly is provided on the outside of the valve stem (14). The uniform lubrication assembly includes a lubrication sleeve (5). The lubrication sleeve (5) is installed on the outside of the valve stem (14). A meandering flow channel (23) is opened inside the lubrication sleeve (5). A lubrication filling port (24) is symmetrically opened on the top of the lubrication sleeve (5). The lubrication filling port (24) is connected to the meandering flow channel (23). A sealing oil cap (25) is installed on the inside of the lubrication filling port (24). A fitting groove (26) is opened on the inside of the lubrication sleeve (5). A permeation flow hole (27) is opened on the inner wall of the fitting groove (26). The permeation flow hole (27) is connected to the meandering flow channel (23).

3. The maintenance-free large-diameter bellows gate valve according to claim 2, characterized in that: The large-diameter shut-off valve body (1) is equipped with a medium flow pipe (8) on the outside, and a connecting flange (9) is installed at the outer end of the medium flow pipe (8). A sealing cavity (11) is symmetrically opened on the top of the valve body sealing end cover (2). A limit frame (12) is installed on the inner side of the sealing cavity (11), and pure graphite filler (13) is placed on the inner side of the limit frame (12).

4. The maintenance-free large-diameter bellows gate valve according to claim 3, characterized in that: The valve cover mounting bracket (3) is provided with a worm gear transmission assembly at its top. The worm gear transmission assembly includes a worm gear box (4), a worm (19), and a transmission lower box (20). The worm (19) is mounted on the inner wall of the worm gear box (4) via bearings. The transmission lower box (20) is installed at the bottom of the worm gear box (4) and is connected to the top of the valve cover mounting bracket (3). A rotating disk shaft (22) is installed on the bottom wall of the transmission lower box (20), and the output end of the rotating disk shaft (22) is connected to the top of the valve stem (14). A transmission worm wheel (21) is installed at the top of the rotating disk shaft (22), and the transmission worm wheel (21) and the rotating disk shaft (22) mesh with each other for transmission.

5. The maintenance-free large-diameter bellows gate valve according to claim 4, characterized in that: A reducer (17) is installed on the outside of the worm gear box (4), and the output end of the reducer (17) is connected to the input end of the worm (19). A drive motor (18) is installed on the outside of the reducer (17), and a remote controller (16) is installed on the outside of the worm gear box (4). The remote controller (16) consists of an adjustment drive module and a wireless receiving module. The adjustment drive module drives and controls the bellows shut-off valve during use. The adjustment drive module is electrically connected to the anti-wear component and the drive motor (18). The wireless receiving module receives the output signal of the background transmission unit.

6. The method of using a maintenance-free large-diameter bellows stop valve according to claim 5, characterized in that, The working steps of this bellows stop valve are as follows: S1. When using the large-diameter bellows gate valve, connect the external pipe to the connecting flange (9). After installation, the drive motor (18) runs. The drive motor (18) rotates and drives the worm (19) to rotate after being controlled by the reducer (17). The input kinetic energy is converted into the output kinetic energy by the meshing action of the worm (19) and the transmission worm wheel (21), so as to realize power transmission and speed regulation. The rotation of the transmission worm wheel (21) drives the valve stem (14) to rotate. The gate valve disc (6) is opened and closed by the transmission of the worm gear box (4). S2. When the valve stem (14) rotates and drives the stop valve disc (6) to descend, the bellows sleeve (15) is stretched by force, and the connecting side frame (28) slides stably on the outside of the fixed round rod (7). When the stop valve disc (6) completely seals the large-diameter stop valve body (1), the buffer collision pad (33) contacts the bottom wall of the middle part of the large-diameter stop valve body (1) and transmits the collision impact force to the buffer spring (32). The buffer spring (32) and the micro damper (31) work together to buffer the impact force and reduce the vibration damage caused by the collision impact to the stop valve disc (6). S3. After a period of use, open the sealing oil cap (25) of the large-diameter bellows gate valve and add lubricating oil through the lubrication filling port (24). The added lubricating oil flows slowly downward through the meandering flow channel (23). During the flow, the lubricating oil is diverted by the permeation flow hole (27) as it flows through. The lubricating oil in the meandering flow channel (23) flows downward from top to bottom and finally flows out from the bottom permeation flow hole (27). The lubricating oil flowing out through multiple permeation flow holes (27) lubricates the outer surface of the valve stem (14) evenly through the fitting groove (26).

7. The method of using a maintenance-free large-diameter bellows stop valve according to claim 6, characterized in that, Step S2 further includes the following steps: S21. When the valve disc (6) of the large-diameter bellows gate valve is damaged during use, the remote controller (16) controls the vertical push lever (35) to work. The vertical push lever (35) retracts, causing the docking limit block (36) to move downward to release the limit on the inside of the docking reinforcement groove (10). After disassembling the valve body sealing end cover (2) and the large-diameter gate valve body (1), the internal thread limit ring (37) is rotated to unscrew it from the outside thread of the fixed round rod (7). After releasing the sleeve relationship between the connecting side frame (28) and the fixed round rod (7), the valve disc (6) is replaced.

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