Combined ultra-large-diameter zero-leakage lift valve

Abstract

The invention discloses a combined ultra-large-diameter zero-leakage lift valve and relates to the technical field of lift valves, the combined ultra-large-diameter zero-leakage lift valve comprises a first connecting end and a second connecting end which are used for being connected with an air pipe, the first connecting end and the second connecting end are provided with a plurality of communicating pipes, the communicating pipes are located between the first connecting end and the second connecting end, and valve elements are arranged in the communicating pipes; a sealing piece is arranged between the valve element and the inner wall of the communicating pipe, installed on the outer wall of the valve element and attached to the inner wall of the communicating pipe. The external connecting frame is located on the outer side of the communicating pipe and connected with the first connecting end and the second connecting end, a driving piece is arranged in the external connecting frame, a valve rod is arranged at the driving end of the driving piece, extends to the valve element from the driving end of the driving piece and is connected with the valve element, a connecting piece is arranged on the outer side, and the connecting piece is connected with the valve rods to achieve synchronous movement of the valve rods. According to the principle of a lifting valve, multi-flow-channel combination and linkage control among multiple valve elements are adopted, and the cost for controlling zero leakage of the super-large air pipe is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lift valves, in particular to a combined super-large-caliber zero-leakage lift valve. Background Art

[0002] RTO (Regenerative Thermal Oxygen System) is a highly efficient waste gas treatment equipment, mainly used to treat volatile organic compounds (VOCs) and organic waste gas. It decomposes waste gas through high-temperature oxidation, converting it into harmless substances such as carbon dioxide and water vapor, while realizing energy recycling.

[0003] Announcement No. CN109027259A discloses a high-pressure gas sealing lift valve, including two valve plate units arranged in the same valve body and separated by a partition, each valve plate unit includes a circular valve plate arranged in the valve body, a valve stem fixed at the upper end to the center of the valve plate, and a cylinder fixed to the outside of the lower side of the valve body and connected to the lower end of the valve stem, and a circular gas storage outer ring and a gas storage inner ring are arranged on the upper side of the valve body corresponding to the peripheral position of the valve plate to form a gas storage ring, and a high-pressure gas interface is arranged on the side valve plate of the valve body to connect to the gas storage ring. Since the gas storage ring formed by the gas storage outer ring and the groove gas inner ring is arranged on the valve body, the high-pressure gas sealing lift valve can achieve sealing by filling with high-pressure gas, which greatly improves the sealing performance of the valve plate when it is closed, and no untreated exhaust gas leakage occurs. At the same time, a sealing device is also arranged between the lower end of the valve stem and the valve body to further improve the sealing effect.

[0004] When the oversized lifting valve is used in working conditions with large air volume, the diameter of the air duct is oversized (>1500mm), the medium pressure is very low (about 10kPa), and the cut-off requirement reaches a very high leakage level. The use of conventional standard butterfly valves has a low cost-effectiveness, which is not conducive to reducing project costs and affects project benefits.

[0005] Although the existing lifting valves (such as the above-mentioned high-pressure gas sealing lifting valve) can achieve good sealing performance, the overall cost of the lifting valve is very high. Once damaged, it will not only fail to perform the sealing function, but will also affect the operation of the entire system. It not only has a low cost-effectiveness, but also affects the overall efficiency. Summary of the invention

[0006] One of the purposes of the present invention is to provide a combined extra-large diameter zero-leakage lift valve for use in large air volume conditions. Through the design of multiple flow channels, multiple valve cores move synchronously to reduce the cost of the lift valve. Even if one of the valve cores is damaged, the normal operation of the lift valve can be guaranteed.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a combined super-large-caliber zero-leakage lift valve, comprising a first connecting end and a second connecting end for connecting to an air duct, wherein the first connecting end is connected to the second connecting end;

[0008] A plurality of connecting pipes are arranged between the first connecting end and the second connecting end. The connecting pipe is located between the first connecting end and the second connecting end. A valve core is arranged inside the connecting pipe. A sealing member is arranged between the valve core and the inner wall of the connecting pipe. The sealing member is installed on the outer wall of the valve core and fits the inner wall of the connecting pipe.

[0009] The external connecting frame is located outside the connecting pipe and is connected to the first connecting end and the second connecting end. A driving member is configured inside the external connecting frame. A valve stem is provided at the driving end of the driving member. The valve stem extends from the driving end of the driving member to the valve core and is connected to the valve core. A connecting member is provided on the outside. The connecting member connects multiple valve stems to realize synchronous movement of the multiple valve stems.

[0010] In one or more embodiments of the present invention, the valve stem extends into the interior of the valve core, the outer wall of one end of the valve stem extending into the interior of the valve core is arc-shaped, the valve core is provided with a recess adapted to the valve stem, and the valve core can swing relative to the valve stem;

[0011] The sealing member comprises at least one annular sealing cavity, the sealing cavity corresponds to the outer edge of the valve core, and the sealing cavity supports the valve core to be in a state parallel to the end surface of the connecting pipe.

[0012] In one or more embodiments of the present invention, there is one driving member, which controls one valve stem and drives multiple valve stems to move synchronously through a connecting member, and the connecting member includes:

[0013] The mounting ring is detachably sleeved on the outside of the valve stem, a slip ring is arranged on the outside of the mounting ring, the slip ring is arranged with mounting holes, and a traction piece is arranged between the mounting holes to connect multiple slip rings;

[0014] The traction member includes a mounting head installed inside the mounting hole and a connecting rod arranged between the mounting heads, the connecting rod is hinged to the mounting head, and two adjacent connecting rods are hinged to each other;

[0015] An electromagnet is arranged outside the connecting rod. The electromagnets are fixed on the outside of the connecting rod and are magnetically attracted to each other. The magnetic attraction force of the electromagnets is greater than the opening force of the valve core.

[0016] In one or more embodiments of the present invention, the connector further comprises:

[0017] An elastic block is fixed to the inner side of the mounting head, and the elastic block is in contact with the connecting rod. The mounting head also includes a limiting end, and the limiting end is in contact with the connecting rod and limits the swinging direction of the connecting rod. The swinging of the connecting rod squeezes the elastic block.

[0018] The detector is installed on the inner side of the external connecting frame. The detector is set corresponding to the valve stem and detects the position of the valve stem. When the driving member drives the valve stem to move, a signal is transmitted to the detector. The detector starts to detect the change of the valve stem position. When the driving member stops driving, a signal is sent to the detector, and the detector turns off the detection of the valve stem.

[0019] In one or more embodiments of the present invention, the driving member is correspondingly arranged on the outside of each valve stem, and the connecting member includes:

[0020] A connecting ring is installed on the outside of the valve stem, and a guide rod is hinged on the outside of the connecting ring, and the guide rod can swing relative to the connecting ring;

[0021] A guide groove is located inside the second connection end and connected to the second connection end, a cover body is arranged inside the guide groove, the cover body contacts the inner wall of the guide groove and slides relative to the guide groove, a pulling end is arranged inside the cover body, the pulling end extends to the outside of the cover body and is connected to the guide rod;

[0022] A magnetic plate is installed on the outside of the pulling end, and adjacent magnetic plates are magnetically attracted.

[0023] In one or more embodiments of the present invention, a return spring is disposed inside the cover body, and the two ends of the return spring are respectively connected to the cover body and the pulling end and support the pulling end, and the adjacent covers are correspondingly arranged:

[0024] When the valve stems on both sides move up and down synchronously, the adjacent magnetic plates are magnetically attracted, and when the valve core is in a sealed state, the guide rod pulls the pulling end outward to separate the magnetic plates.

[0025] In one or more embodiments of the present invention, the connecting pipe is a countersunk setting, the valve core extends into the connecting pipe, the outer diameter of the valve core is smaller than the outer diameter of the connecting pipe, and the sealing member contacts the end face of the countersunk hole and the annular inner wall of the connecting pipe.

[0026] In one or more embodiments of the present invention, the seal comprises:

[0027] The elastic body is installed on the inner side of the valve core. The elastic body is L-shaped, and wear-resistant strips are arranged at the corners of the elastic body. The wear-resistant strips are attached to the outer surface of the elastic body.

[0028] The annular sealing cavity is opened inside the elastic body;

[0029] The mounting protrusion is formed on the outer wall of the elastomer, and a support frame is arranged inside the elastomer. The support frame is fixed to the inner side of the elastomer through the mounting protrusion and supports the elastomer.

[0030] In one or more embodiments of the present invention, an annular groove is provided on the inner side of the valve core, a sealing member is installed inside the annular groove, a spring sheet is arranged on the outer wall of the valve core, the spring sheet is arranged in a V-shape, one end of the spring sheet is fixed to the outer wall of the valve core, and the other end of the spring sheet is sleeved with a rubber sleeve and in contact with the inner wall of the connecting tube.

[0031] In one or more embodiments of the present invention, both ends of the connecting pipe are respectively installed on the outside of the first connecting end and the second connecting end by bolts, and sealing plates are arranged between the connecting pipe and the first connecting end and the second connecting end. When the connecting pipe connects the first connecting end and the second connecting end, the sealing plates are squeezed.

[0032] Through the above technical solution, the present invention has the following beneficial effects:

[0033] 1. This application adopts a multi-channel combination and linkage control between multiple valve cores based on the principle of the lifting valve, which reduces the cost of zero leakage control of super-large air ducts, and when the internal valve core is damaged, it can reduce the cost of maintenance and replacement, thereby reducing the cost of the lifting valve, ensuring synchronous movement during the movement of the valve stem, and ensuring the stability of the valve core.

[0034] 2. When the valve stem is controlled by a separate drive, the interconnection of the connecting parts between the valve stems is utilized to ensure the stability of the valve stem movement, and to ensure that when the valve core is stuck, the valve stem corresponding to the valve core can be disconnected from the connecting part, avoiding forced pulling or other situations where the valve core cannot be opened, and further ensuring the movement stability of the valve stem and valve core during movement.

[0035] 3. A valve core that can swing relative to the valve stem is provided. When the valve core extends to the inside of the connecting pipe to seal the connecting pipe, it can ensure stable fit with the connecting pipe according to the countersunk end face of the connecting pipe, thereby avoiding the problem of excessive squeezing of the seal that first contacts the connecting pipe when the end face of the connecting pipe is not parallel to the end face of the valve core, thereby ensuring the healthy service life of the seal.

[0036] 4. When the seal contacts the connecting pipe for sealing, it contacts the two inner wall surfaces of the connecting pipe at the same time, ensuring stable contact between the seal and the connecting pipe and improving the sealing performance of the seal and the connecting pipe. After the valve core is closed, it will further squeeze the seal with the connecting pipe, and the annular sealing cavity of the seal will expand to further ensure the reliability of the seal.

[0037] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A perspective view of the present invention;

[0039] Figure 2 A cross-sectional view of the first connecting end and the second connecting end of the present invention;

[0040] Figure 3 This is a schematic diagram of the present invention with the first connection end and the second connection end removed internally;

[0041] Figure 4 It is a schematic diagram of the connecting pipe structure of the present invention;

[0042] Figure 5It is a cross-sectional view of the connecting pipe structure of the present invention;

[0043] Figure 6 Schematic diagram of the connector structure of the present invention Figure 1 ;

[0044] Figure 7 It is a cross-sectional view of the valve core of the present invention;

[0045] Figure 8 It is a cross-sectional plan view of the valve core of the present invention;

[0046] Fig. 9 The connecting member of the present invention explodes Figure 1 ;

[0047] Fig.10 is a cross-sectional view of the mounting head of the present invention;

[0048] Fig.11 It is a schematic diagram of multiple driving members of the present invention;

[0049] Fig.12 It is a schematic diagram of connecting a plurality of driving members to a valve stem of the present invention;

[0050] Fig.13 The connecting member of the present invention is shown in FIG. Figure 2 ;

[0051] Fig.14 It is a schematic diagram of the guide groove of the present invention;

[0052] Fig.15 It is a schematic diagram of the internal structure of the cover body of the present invention.

[0053] In the figure: 1 first connecting end, 2 second connecting end, 3 connecting pipe, 4 driving member, 5 valve stem, 6 valve core, 7 sealing member, 8 connecting member, 9 external connecting frame, 10 sealing sheet;

[0054] 61 pit, 62 ring groove, 63 spring piece, 64 countersunk hole;

[0055] 71 elastic body, 72 annular sealing chamber, 73 mounting protrusion, 74 support frame;

[0056] a81 mounting ring, a82 slip ring, a83 mounting hole, a84 traction piece: a841 mounting head, a842 connecting rod, a843 electromagnet, a844 elastic block, a845 limiting end, a846 detector;

[0057] b81 connecting ring, b82 guide rod, b83 guide groove, b84 cover body, b85 pulling end, b86 magnetic plate, b87 return spring. DETAILED DESCRIPTION

[0058] The following will disclose multiple embodiments of the present invention with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. And if it is possible to implement, the features of different embodiments can be applied interchangeably.

[0059] Unless otherwise defined, all words (including technical and scientific terms) used herein have their usual meanings, which can be understood by those familiar with this field. Furthermore, the definitions of the above words in commonly used dictionaries should be interpreted as the meanings consistent with the relevant fields of the present invention in the content of this specification. Unless otherwise clearly defined, these words will not be interpreted as idealized or overly formal meanings.

[0060] The following is an explanation of the relationships and terms used in this application:

[0061] Parallel: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for non-absolute parallelism due to factors such as assembly tolerance, design tolerance, and the influence of structural flatness. Small angular errors are allowed. For example, an assembly error range of less than 10 degrees can be understood as a parallel relationship.

[0062] Vertical: The verticality defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. It also allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0063] Floor: The floor defined in this application is not limited to a certain material or region, but only a platform for carrying this application, and stacking, tilting, and flatness changes are allowed. For example, cement floor, tile floor, work platform, etc. can all be interpreted as floor.

[0064] The above explanation does not completely include the relationship definitions given in this application, but only represents part of it.

[0065] The present invention provides a combined extra-large-caliber zero-leakage lift valve for use in large air volume conditions. Through the design of multiple flow channels, multiple valve cores move synchronously, which reduces the cost of the lift valve. Even when one of the valve cores is damaged, the normal operation of the lift valve can be guaranteed.

[0066] See also Figure 1-2As shown, in one embodiment, the lift valve includes a first connecting end 1 and a second connecting end 2 for connecting to the air duct, and the first connecting end 1 is connected to the second connecting end;

[0067] A plurality of connecting pipes 3 are provided between the first connecting end 1 and the second connecting end 2. The connecting pipe 3 is located between the first connecting end 1 and the second connecting end 2. A valve core is arranged inside the connecting pipe 3. A sealing member 7 is arranged between the valve core and the inner wall of the connecting pipe 3. The sealing member 7 is installed on the outer wall of the valve core and fits the inner wall of the connecting pipe.

[0068] The external connecting frame 9 is located outside the connecting pipe 3 and is connected to the first connecting end 1 and the second connecting end 2. The external connecting frame 9 is internally configured with a driving member 4. A valve stem is provided at the driving end of the driving member 4. The valve stem extends from the driving end of the driving member 4 to the valve core and is connected to the valve core. A connecting member 8 is provided on the outside. The connecting member 8 connects multiple valve stems to realize synchronous movement of the multiple valve stems.

[0069] In one feasible method, a large-diameter air duct is converted into a plurality of small-diameter connecting modes, and the connecting pipe 3 is sealed separately by a plurality of valve cores, and the opening and closing of the plurality of valve cores are performed synchronously, thereby reducing the cost of the zero leakage level of the super-large air duct. Moreover, since each connecting pipe 3 and the valve core can be independently set, when a problem occurs with the valve core, the problematic valve core can be replaced individually, thereby reducing the daily maintenance and replacement cost of the valve core.

[0070] Among them, a connecting member 8 is provided to connect multiple valve stems. When the driving member 4 drives the valve core to move through the valve stem, it can synchronously drive the multiple valve cores to move, ensuring the simultaneous opening and closing of the valve cores, achieving the same control effect as a butterfly valve in the opening and closing of super-large air ducts, and further ensuring the operating stability of the multi-channel lifting valve.

[0071] Optionally, the driving member 4 is configured as a hydraulically assisted cylinder, and the cylinder is extended and retracted to change the position of the valve stem, thereby controlling the position of the valve core.

[0072] Alternatively, the driving member 4 is configured as a jack, which is installed on the inner side of the external connecting frame 9. A pressure plate is arranged between the jack and the valve stem. The middle part of the pressure plate can be rotatably installed on the inner side of the external connecting frame 9, and the two ends of the pressure plate are respectively arranged above the valve stem and the jack. When the jack is extended, the pressure plate presses down the valve stem. A support spring is arranged on the outer side of the valve stem. When the jack is retracted, the support spring pushes the valve stem out.

[0073] See also Figure 6-7 As shown, in one embodiment, the valve stem extends into the interior of the valve core, the outer wall of one end of the valve stem extending into the interior of the valve core is arc-shaped, the valve core is provided with a recess 61 adapted to the valve stem, and the valve core can swing relative to the valve stem;

[0074] The sealing member 7 includes at least one annular sealing cavity 72 , the sealing cavity corresponds to the outer edge of the valve core, and the sealing cavity supports the valve core to be in a state parallel to the end surface of the connecting pipe 3 .

[0075] In one feasible manner, when the valve core moves and contacts the connecting tube 3 for sealing, the sealing cavity contacts the connecting tube 3, and the sealing member 7 is squeezed. When the valve core is in a fixed angle state, the sealing member 7 that first contacts the end face of the connecting tube 3 will be subjected to a greater extrusion force. The valve core is set to a state where it can swing within a small range. When the valve core is sealed, the sealing member 7 first contacts one side of the cross section of the connecting tube 3 and is subjected to force, which will cause the valve core to tilt, thereby avoiding the problem of excessive extrusion.

[0076] Among them, setting a valve core that can swing in a small range not only avoids the problem of excessive extrusion of the seal 7 in a small range, but also reduces the production accuracy of the lifting valve. Even if the valve core and the end face of the connecting pipe 3 are not parallel, the stability of the seal can be guaranteed, and the seal 7 will not be excessively worn.

[0077] See also Figure 1-3 as well as Figure 5-6 as well as Fig. 9 As shown, in one embodiment, there is one driving member 4, which controls one valve stem and drives multiple valve stems to move synchronously through a connecting member 8, and the connecting member 8 includes:

[0078] The mounting ring a81 is detachably sleeved on the outer side of the valve stem, a slip ring a82 is arranged on the outer side of the mounting ring a81, and the slip ring a82 is arranged with mounting holes a83, and a traction piece a84 is arranged between the mounting holes a83 to connect multiple slip rings a82;

[0079] The traction member a84 includes a mounting head a841 mounted inside the mounting hole a83 and a connecting rod a842 arranged between the mounting heads a841, the connecting rod a842 is hinged to the mounting head a841, and two adjacent connecting rods a842 are hinged to each other;

[0080] An electromagnet a843 is arranged outside the connecting rod a842. The electromagnet a843 is fixed to the outside of the connecting rod a842 and magnetically attracted to each other. The magnetic attraction force of the electromagnet a843 is greater than the opening force of the valve core.

[0081] In one feasible manner, when there is only one driving member 4, multiple valve stems are synchronously driven by a single driving member 4, and the connection between the valve stems is achieved by multiple traction members a84. When the driving member 4 drives a single valve stem to change its height, the magnetism between the electromagnets a843 is utilized to ensure that the two valve stems connected to each other are opened synchronously.

[0082] In order to avoid the valve core from getting stuck, an electromagnet a843 is configured for the magnetic force between the connecting rod a842. Since the magnetic force of the electromagnet a843 is greater than the opening force of the valve core, the electromagnets a843 will not be disengaged when the valve core can be opened normally, ensuring the synchronous movement of multiple valve stems. When the valve core cannot be opened normally, the valve core is stuck. At this time, the opening force of the valve core increases and exceeds the magnetic force of the electromagnet a843. At this time, the magnetic force of the electromagnet a843 is disengaged, and the connecting rod a842 swings, avoiding damage to the connecting part 8 caused by the inability to open the valve core.

[0083] See also Figure 3 as well as Figure 9-10 As shown, in one embodiment, the connecting member 8 further comprises:

[0084] The elastic block a844 is fixed to the inner side of the mounting head a841. The elastic block a844 fits the connecting rod a842. The mounting head a841 also includes a limiting end a845. The limiting end a845 fits the connecting rod a842 and limits the swinging direction of the connecting rod a842. The swinging of the connecting rod a842 squeezes the elastic block a844.

[0085] Detector a846 is installed on the inner side of the external connecting frame 9. Detector a846 is set corresponding to the valve stem and detects the position of the valve stem. When the driving member 4 drives the valve stem to move, a signal is transmitted to the detector a846. Detector a846 starts to detect the change of the valve stem position. When the driving member 4 stops driving, a signal is sent to the detector a846. Detector a846 turns off the detection of the valve stem.

[0086] In one feasible manner, through the positions of the elastic block a844 and the limiting end a845, when the valve stem moves upward, the traction member a84 is used to synchronously drive the movement of other valve stems, and the limiting end a845 can limit the swinging direction of the connecting rod a842, thereby preventing the connecting rod a842 from swinging and causing the valve stem to be unable to open when the valve core can open normally.

[0087] Among them, the detector a846 is set to be able to alarm when the valve stem cannot be opened normally. Since the lifting valve is provided with multiple connecting pipes 3, when one part of the valve core is opened and the other part of the valve core is closed, it can still be connected. Therefore, by detecting the valve stem position through the detector a846, the opening state of each valve stem can be determined.

[0088] See also Fig.11 as well as Figure 12-14 As shown, in one embodiment, the driving member 4 is correspondingly arranged on the outside of each valve stem, and the connecting member 8 includes:

[0089] A connecting ring b81 is installed on the outside of the valve stem, and a guide rod b82 is hinged on the outside of the connecting ring b81, and the guide rod b82 can swing relative to the connecting ring b81;

[0090] The guide groove b83 is located inside the second connection end 2 and connected to the second connection end 2. A cover body b84 is provided inside the guide groove b83. The cover body b84 contacts the inner wall of the guide groove b83 and slides relative to the guide groove b83. A pulling end b85 is provided inside the cover body b84. The pulling end b85 extends to the outside of the cover body b84 and is connected to the guide rod b82.

[0091] A magnetic plate b86 is installed on the outside of the pulling end b85, and adjacent magnetic plates b86 are magnetically attracted.

[0092] In one feasible manner, a guide groove b83 is provided to limit the movement of the cover body b84. When the cover body b84 is at the bottom, the valve stem continues to move downward. At this time, the guide rod b82 will pull the pulling end b85 outward, and the pulling end b85 squeezes the reset spring b87, thereby disengaging the magnetic plate b86. When the valve stem moves upward, due to the action of the reset spring b87, the pulling end b85 is pushed outward, so that the magnetic plate b86 first contacts the magnetic attraction, and then the two adjacent cover bodies b84 move synchronously.

[0093] During the movement of the valve stem, the connection to the valve stem is utilized to further ensure the stability of the movement of the valve stem.

[0094] See also Fig.15 As shown, in one embodiment, a return spring b87 is disposed inside the cover body b84, and two ends of the return spring b87 are respectively connected to the cover body b84 and the pulling end b85 and support the pulling end b85, and adjacent covers b84 are correspondingly arranged:

[0095] When the valve stems on both sides move up and down synchronously, the adjacent magnetic plates b86 are magnetically attracted. When the valve core is in a sealed state, the guide rod b82 pulls the pulling end b85 outward to separate the magnetic plates b86.

[0096] In one feasible method, when the height of the valve stem is adjusted, the magnetic plates b86 are magnetically attracted to each other, thereby further ensuring the stability of the valve stem when the valve stem moves. When the valve core is opened, if one side of the valve core is in a stuck state, the magnetic plates b86 on both sides of the corresponding valve stem will not be pushed out, so that the magnetic plates b86 will not be connected.

[0097] The use of a separate magnetic plate b86 makes it more convenient to replace and maintain the valve core.

[0098] See also Figure 3-5 As shown, in one embodiment, the connecting pipe 3 is provided with a countersunk hole 64, the valve core extends into the connecting pipe 3, the outer diameter of the valve core is smaller than the outer diameter of the connecting pipe 3, and the sealing member 7 contacts the end face of the countersunk hole 64 and the annular inner wall of the connecting pipe 3.

[0099] In one feasible method, the connecting tube 3 is set as a countersunk hole 64, the valve core can extend into the interior of the connecting tube 3, and the valve core and the connecting tube 3 are squeezed to enable the seal 7 to contact the two surfaces of the connecting tube 3 to ensure good sealing. When the valve core is closed, it will squeeze the seal 7 with the connecting tube 3, and the position where the seal 7 contacts the annular inner wall will expand, further enhancing the sealing stability.

[0100] See also Figure 7-8 As shown, in one embodiment, the seal 7 comprises:

[0101] The elastic body 71 is installed inside the valve core. The elastic body 71 is L-shaped, and wear-resistant strips are arranged at the corners of the elastic body 71. The wear-resistant strips are attached to the outer surface of the elastic body 71.

[0102] The annular sealing cavity 72 is opened inside the elastic body 71;

[0103] The mounting protrusion 73 is formed on the outer wall of the elastic body 71 . A support frame 74 is disposed inside the elastic body 71 . The support frame 74 is fixed to the inner side of the elastic body 71 through the mounting protrusion 73 and supports the elastic body 71 .

[0104] In one feasible manner, by utilizing the L-shaped setting of the elastomer 71, when the valve core is closed, the elastomer 71 can fit into at least two inner walls of the connecting tube 3. By providing wear-resistant strips, it is possible to avoid the elastomer 71 contacting the edge of the connecting tube 3 when the valve core is closed, causing excessive wear of the seal 7.

[0105] Among them, since the annular sealing cavity 72 will be squeezed after the valve core is closed, in order to ensure that the elastomer 71 stably contacts the inner wall of the connecting pipe, a support frame 74 is used to support the elastomer 71 to limit the inner diameter of the elastomer 71 and ensure that the elastomer 71 stably fits the annular inner wall.

[0106] See also Figure 7-8 As shown, in one embodiment, an annular groove 62 is provided on the inner side of the valve core, the sealing member 7 is installed inside the annular groove 62, and a spring piece 63 is arranged on the outer wall of the valve core. The spring piece 63 is arranged in a V shape, one end of the spring piece 63 is fixed to the outer wall of the valve core, and the other end of the spring piece 63 is sleeved with a rubber sleeve and contacts the inner wall of the connecting pipe 3.

[0107] In one feasible method, the spring clip 63 is used to position and center the valve core. Since the valve core can swing in a small range relative to the valve stem and the outer diameter of the valve core is smaller than the inner diameter of the counterbore 64, the spring clip 63 can ensure the stability of the valve core when it enters the counterbore 64. Due to the elastic setting of the spring clip 63, when the valve core needs to be tilted to fit the end face of the counterbore 64, there will be no restriction on the valve core.

[0108] See also Figure 3-4As shown, in one embodiment, both ends of the connecting pipe 3 are respectively installed on the outside of the first connecting end 1 and the second connecting end 2 by bolts, and a sealing sheet 10 is arranged between the connecting pipe 3 and the first connecting end 1 and the second connecting end 2. When the connecting pipe 3 connects the first connecting end 1 and the second connecting end 2, the sealing sheet 10 is squeezed.

[0109] In one practicable manner, the connecting pipe 3 is connected to the first connection end 1 and the second connection end 2 by bolt installation, which can facilitate maintenance and replacement of structures such as a single valve core and a sealing member 7.

[0110] The present application does not limit the location of the connecting pipe 3. For example, the connecting pipe 3 can be arranged in a ring array, or in a line.

[0111] In summary, the technical solutions disclosed in the above embodiments of the present invention have at least the following advantages:

[0112] 1. This application adopts a multi-channel combination and linkage control between multiple valve cores based on the principle of the lifting valve, which reduces the cost of zero leakage control of super-large air ducts, and when the internal valve core is damaged, it can reduce the cost of maintenance and replacement, thereby reducing the cost of the lifting valve, ensuring synchronous movement during the movement of the valve stem, and ensuring the stability of the valve core.

[0113] 2. When the valve stem is controlled by a separate drive, the interconnection of the connecting parts between the valve stems is utilized to ensure the stability of the valve stem movement, and to ensure that when the valve core is stuck, the valve stem corresponding to the valve core can be disconnected from the connecting part, avoiding forced pulling or other situations where the valve core cannot be opened, and further ensuring the movement stability of the valve stem and valve core during movement.

[0114] 3. A valve core that can swing relative to the valve stem is provided. When the valve core extends to the inside of the connecting pipe to seal the connecting pipe, it can ensure stable fit with the connecting pipe according to the countersunk end face of the connecting pipe, thereby avoiding the problem of excessive squeezing of the seal that first contacts the connecting pipe when the end face of the connecting pipe is not parallel to the end face of the valve core, thereby ensuring the healthy service life of the seal.

[0115] 4. When the seal contacts the connecting pipe for sealing, it contacts the two inner wall surfaces of the connecting pipe at the same time, ensuring stable contact between the seal and the connecting pipe and improving the sealing performance of the seal and the connecting pipe. After the valve core is closed, it will further squeeze the seal with the connecting pipe, and the annular sealing cavity of the seal will expand to further ensure the reliability of the seal.

[0116] Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the attached claims.

Claims

1. A combined super-large-caliber zero-leakage lift valve, comprising a first connecting end (1) and a second connecting end (2) for connecting to an air duct, wherein the first connecting end (1) is connected to the second connecting end; characterized in that: A plurality of connecting tubes (3) are provided between the first connecting end (1) and the second connecting end (2); the connecting tubes (3) are located between the first connecting end (1) and the second connecting end (2); a valve core is arranged inside the connecting tube (3); a sealing member (7) is arranged between the valve core and the inner wall of the connecting tube (3); the sealing member (7) is installed on the outer wall of the valve core and fits the inner wall of the connecting tube; An external connecting frame (9) is located outside the connecting pipe (3) and is connected to the first connecting end (1) and the second connecting end (2). A driving member (4) is arranged inside the external connecting frame (9). A valve stem is arranged at the driving end of the driving member (4). The valve stem extends from the driving end of the driving member (4) to the valve core and is connected to the valve core. A connecting member (8) is arranged outside. The connecting member (8) connects multiple valve stems to realize synchronous movement of the multiple valve stems.

2. The combined super-large-caliber zero-leakage lift valve according to claim 1, characterized in that: The valve stem extends into the interior of the valve core, the outer wall of one end of the valve stem extending into the interior of the valve core is arc-shaped, the valve core is provided with a recess (61) adapted to the valve stem, and the valve core can swing relative to the valve stem; The sealing element (7) comprises at least one annular sealing cavity (72), the sealing cavity corresponds to the outer edge of the valve core, and the sealing cavity supports the valve core in a state parallel to the end surface of the connecting pipe (3).

3. The combined super-large-caliber zero-leakage lift valve according to claim 2 is characterized in that: There is one driving member (4), which controls one valve stem and drives multiple valve stems to move synchronously through a connecting member (8), and the connecting member (8) includes: A mounting ring (a81) is detachably sleeved on the outer side of the valve stem, a slip ring (a82) is arranged on the outer side of the mounting ring (a81), the slip ring (a82) is arranged with a mounting hole (a83), and a traction member (a84) is arranged between the mounting holes (a83) to connect multiple slip rings (a82); The traction member (a84) comprises a mounting head (a841) mounted inside the mounting hole (a83) and a connecting rod (a842) arranged between the mounting heads (a841), the connecting rod (a842) is hinged to the mounting head (a841), and two adjacent connecting rods (a842) are hinged to each other; An electromagnet (a843) is arranged outside the connecting rod (a842). The electromagnet (a843) is fixed to the outside of the connecting rod (a842) and is magnetically attracted to each other. The magnetic attraction force of the electromagnet (a843) is greater than the opening force of the valve core.

4. The combined super-large-caliber zero-leakage lift valve according to claim 3 is characterized in that: The connecting piece (8) further comprises: The elastic block (a844) is fixed on the inner side of the mounting head (a841), and the elastic block (a844) is in contact with the connecting rod (a842). The mounting head (a841) also includes a limiting end (a845), and the limiting end (a845) is in contact with the connecting rod (a842) and limits the swinging direction of the connecting rod (a842). The swinging of the connecting rod (a842) squeezes the elastic block (a844); The detector (a846) is installed on the inner side of the external connecting frame (9). The detector (a846) is set corresponding to the valve stem and detects the position of the valve stem. When the driving member (4) drives the valve stem to move, a signal is transmitted to the detector (a846). The detector (a846) starts to detect the change of the valve stem position. When the driving member (4) stops driving, a signal is sent to the detector (a846). The detector (a846) turns off the detection of the valve stem.

5. The combined super-large-caliber zero-leakage lift valve according to claim 2, characterized in that: The driving member (4) is correspondingly arranged on the outside of each valve stem, and the connecting member (8) comprises: A connecting ring (b81) is installed on the outside of the valve stem, and a guide rod (b82) is hinged on the outside of the connecting ring (b81), and the guide rod (b82) can swing relative to the connecting ring (b81); A guide groove (b83) is located inside the second connecting end (2) and connected to the second connecting end (2); a cover body (b84) is arranged inside the guide groove (b83); the cover body (b84) contacts the inner wall of the guide groove (b83) and slides relative to the guide groove (b83); a pulling end (b85) is arranged inside the cover body (b84); the pulling end (b85) extends to the outside of the cover body (b84) and is connected to the guide rod (b82); A magnetic plate (b86) is installed outside the pulling end (b85), and adjacent magnetic plates (b86) are magnetically attracted.

6. The combined super-large-caliber zero-leakage lift valve according to claim 5, characterized in that: A return spring (b87) is arranged inside the cover body (b84), and two ends of the return spring (b87) are respectively connected to the cover body (b84) and the pulling end (b85) and support the pulling end (b85). Adjacent covers (b84) are arranged correspondingly: When the valve stems on both sides move up and down synchronously, the adjacent magnetic plates (b86) are magnetically attracted, and when the valve core is in a sealed state, the guide rod (b82) pulls out the pulling end (b85) to separate the magnetic plates (b86).

7. The combined super-large-caliber zero-leakage lift valve according to claim 4 or 5, characterized in that: The connecting pipe (3) is provided with a counterbore (64), the valve core extends into the interior of the connecting pipe (3), the outer diameter of the valve core is smaller than the outer diameter of the connecting pipe (3), and the sealing member (7) contacts the end surface of the counterbore (64) and the annular inner wall of the connecting pipe (3).

8. The combined super-large-caliber zero-leakage lift valve according to claim 7, characterized in that: The sealing element (7) comprises: The elastic body (71) is installed inside the valve core. The elastic body (71) is L-shaped, and wear-resistant strips are arranged at the corners of the elastic body (71). The wear-resistant strips are attached to the outer surface of the elastic body (71). An annular sealing chamber (72) is provided inside the elastic body (71); The mounting protrusion (73) is formed on the outer wall of the elastic body (71), and a support frame (74) is arranged inside the elastic body (71). The support frame (74) is fixed to the inner side of the elastic body (71) through the mounting protrusion (73) and supports the elastic body (71).

9. The combined super-large-caliber zero-leakage lift valve according to claim 8, characterized in that: An annular groove (62) is arranged on the inner side of the valve core, and a sealing member (7) is installed inside the annular groove (62). A spring sheet (63) is arranged on the outer wall of the valve core. The spring sheet (63) is arranged in a V shape. One end of the spring sheet (63) is fixed to the outer wall of the valve core, and the other end of the spring sheet (63) is sleeved with a rubber sleeve and contacts the inner wall of the connecting pipe (3).

10. The combined super-large-caliber zero-leakage poppet valve according to claim 9, characterized in that: The two ends of the connecting pipe (3) are respectively mounted on the outside of the first connecting end (1) and the second connecting end (2) by means of bolts; sealing sheets (10) are arranged between the connecting pipe (3) and the first connecting end (1) and the second connecting end (2); the sealing sheets (10) are pressed when the connecting pipe (3) connects the first connecting end (1) and the second connecting end (2).

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