A kind of high temperature ventilation butterfly valve's butterfly plate valve shaft anti-looseness anti-vibration bolt connection structure

Abstract

The utility model provides a kind of high-temperature ventilation butterfly valve's butterfly plate valve shaft anti-loose anti-vibration bolt connecting structure for ship, including valve body, further including valve seat on valve body, valve seat is equipped with valve core, valve core is connected with valve door rotating shaft and is penetrated, valve body is movably connected with butterfly plate body, the side screw thread connection of butterfly plate body is equipped with connecting bolt, specially-made gasket is movably inserted in the tail end of connecting bolt, the tail end of connecting bolt is screw-connected with hexagon nut;Valve door rotating shaft and butterfly plate body are all equipped with light hole, the inside of gasket groove is equipped with axial key groove a;Connecting bolt is equipped with axial key groove b;The side of specially-made gasket is provided with inner key tooth, the utility model is equipped with matching key groove by being set on butterfly plate and bolt, and specially-made gasket with inner key tooth and axial elastic structure is used to realize bidirectional interlocking and thermal compensation, while integrating built-in glue guide channel and friction texture, form a kind of anti-loose, anti-vibration, torque integrated high-reliability bolt connecting structure.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a butterfly plate valve shaft anti-loosening and vibration-resistant bolt connection structure for a marine high-temperature ventilation butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. It refers to a valve where the closing element (valve disc or butterfly plate) is a disc that rotates around a valve shaft to open and close. Butterfly valves can control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices. The butterfly valve's opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body to achieve opening, closing, or regulation. Traditionally, the butterfly valve disc and shaft are connected by pins, requiring the valve body, valve plate, and valve shaft to be assembled before drilling holes and installing pins. Improper operation may lead to leakage.

[0003] Chinese patent CN202123415505.9 discloses a connecting assembly for a disc valve plate and valve shaft, including a valve body. End caps are threaded onto both the upper and lower ends of the valve body. Friction pads are installed at the bottom of the inner ends of the two end caps, and bearings are installed inside the two end caps. A second valve shaft and a first valve shaft are respectively interference-fitted at the center of the upper and lower bearings. A valve plate is fixedly connected to the top of the first valve shaft, and a pressure pad is snapped onto the upper surface of the top end cap. A stuffing box is filled between the second valve shaft and the end cap. A valve body sealing ring is placed between the inside of the valve body and the end cap, and a disc plate sealing ring is placed between the valve plate and the valve body. This connecting assembly for the disc valve plate and valve shaft uses a key connection instead of a traditional pin connection. A keyway is machined on the second valve shaft, a flat key is inserted, and the assembly is completed by aligning and installing it into the valve body and valve plate. This makes the connection between the valve plate and valve shaft tighter and prevents leakage caused by the valve plate detaching due to improper operation.

[0004] However, this technical solution has certain shortcomings in use. In the high-temperature ventilation system of ships, the reliability of the connection between the butterfly valve shaft and the butterfly plate is crucial. Although the traditional key or pin connection can transmit torque, the fit clearance is easy to cause wear and loosening, and weakens the strength of the parts. Other anti-loosening solutions focus on nut tightening, neglecting to prevent the connection part itself (such as bolt) from rotating relative to the connected part (butterfly plate), which may still fail under complex working conditions. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a bolt connection structure for the anti-loosening and vibration-resistant bolts of a marine high-temperature ventilation butterfly valve shaft. This structure achieves the connection function through a specially designed gasket in conjunction with the connecting bolts, thus solving the problem of poor connection performance.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A marine high-temperature ventilation butterfly valve has a butterfly plate valve shaft anti-loosening and vibration-resistant bolt connection structure, including a valve body and a valve seat on the valve body. A valve core is installed on the valve seat, and a valve shaft is connected through the valve core. A butterfly plate body is movably connected inside the valve body. A connecting bolt is threaded to one side of the butterfly plate body. A special washer is movably inserted into the tail end of the connecting bolt, and a hexagonal nut is threaded to the tail end of the connecting bolt. Both the valve shaft and the butterfly plate body have through holes. A washer groove is formed at one end of each through hole, and an axial groove is formed on the inner side of the washer groove. Keyway a; an axial keyway b is provided on the connecting bolt, and a toothed groove extends from the tail end of the axial keyway b; an internal key tooth is provided on one side of the special gasket, and a key tooth extension end is provided on one side of the internal key tooth; the special gasket is a ring-shaped metal component, and an axial elastic structure is provided on the body of the special gasket; the connecting bolt passes through the light holes of the valve shaft and the butterfly plate body in sequence, the special gasket is fitted onto the connecting bolt, and the internal key tooth is simultaneously embedded in the axial keyway a and the axial keyway b to achieve circumferential anti-rotation, and finally locked by the threaded hexagonal nut.

[0008] The axial elastic structure is an annular corrugation formed by stamping on the special gasket body.

[0009] The specially designed gasket has a high-friction texture on its surface that contacts the butterfly plate body and the hexagonal nut.

[0010] The cross-sectional shape of the internal key teeth matches the cross-sectional shape of the axial keyway a and axial keyway b on the butterfly plate body and the connecting bolt, forming a transition or small clearance fit.

[0011] The inner wall of the protruding end of the protruding tooth is provided with multiple sets of glue storage grooves, which are evenly distributed. The special gasket is provided with multiple sets of glue guiding grooves, which are arranged in a ring. The special gasket is provided with a connecting groove, and the multiple sets of glue guiding grooves are connected and interconnected through the connecting groove.

[0012] One end of the multiple sets of adhesive guiding grooves is an adhesive outlet, and the other end of the multiple sets of adhesive guiding grooves is a flow-through outer wall groove. A lower adhesive groove is opened at the tail end of the flow-through outer wall groove.

[0013] A glue injection nozzle is provided on the outside of one set of glue outlet holes.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) This utility model decouples and optimizes the torque transmission and anti-rotation functions. The main torque is efficiently transmitted by the shearing of the smooth rod of the reinforcing bolt, without relying on the anti-rotation structure. The anti-rotation function is handled by an independent "double groove interlocking" mechanism. The two perform their respective functions and achieve optimal performance. The key teeth inside the gasket interlock with the bolt and the butterfly plate at the same time, forming a solid anti-rotation chain, which fundamentally prevents circumferential sliding inside the connecting pair. The structure is compact and the assembly is well-defined. All functions are integrated into a few parts. During assembly, only the grooves need to be inserted to solve the positioning and anti-rotation problems at once. It has strong environmental adaptability, good overall rigidity, elastic compensation to adapt to thermal deformation, and high corrosion resistance design to withstand salt spray, making it especially suitable for harsh marine environments.

[0016] (2) The integrated glue coating system of this utility model has a built-in glue guiding channel. The specially made gasket has microstructures such as glue storage tank, glue guiding tank, connecting tank, glue outlet, flow outer wall groove, and lower glue tank. Microcapsule adhesive is injected through the glue injection nozzle. The glue can be automatically distributed to multiple key parts such as key teeth and nut contact surfaces. The glue is heat-activated. During assembly, the friction of tightening the nut generates heat, which improves the fluidity of the glue, achieves uniform coating, enhances the connection strength and buffer performance, and seals through the glue, reducing the problem of corrosion and rust inside the connection structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the valve shaft structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the overall structure of the butterfly plate of this utility model;

[0021] Figure 5 This is a partial cross-sectional structural diagram of the butterfly plate of this utility model;

[0022] Figure 6 for Figure 5 Enlarged structural diagram at point A;

[0023] Figure 7 This is a schematic diagram of the overall structure of the specially designed gasket of this utility model;

[0024] Figure 8 This is a schematic diagram of the cross-sectional structure of the specially designed gasket of this utility model.

[0025] Figure Labels

[0026] 1. Valve body; 2. Valve seat; 3. Valve core; 4. Valve shaft; 5. Butterfly plate body; 501. Through hole; 502. Gasket groove; 503. Axial keyway a; 6. Connecting bolt; 601. Axial keyway b; 602. Toothed groove; 7. Special gasket; 701. Internal key; 702. Key extension end; 703. Annular corrugation; 704. Glue storage tank; 705. Glue guide groove; 7051. Connecting groove; 7052. Glue outlet; 7053. Flow groove on outer wall; 7054. Lower glue groove; 706. Glue injection nozzle; 8. Hexagonal nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Example 1

[0031] like Figures 1-6As shown, this embodiment provides a butterfly plate valve shaft anti-loosening and anti-vibration bolt connection structure for a marine high-temperature ventilation butterfly valve. It includes a valve body and a valve seat on the valve body. A valve core is installed on the valve seat, and a valve shaft is connected through the valve core. A butterfly plate body is movably connected within the valve body. A connecting bolt is threaded onto one side of the butterfly plate body. A special washer is movably inserted into the tail end of the connecting bolt, and a hexagonal nut is threaded onto the tail end of the connecting bolt. Both the valve shaft and the butterfly plate body have through holes, and a washer groove is formed at one end of each through hole. An axial keyway a is provided on the inner side of the valve; an axial keyway b is provided on the connecting bolt, and a toothed groove extends from the tail end of the axial keyway b; a special gasket has an inner key tooth on one side and a key tooth extension end on the other side. The special gasket is a ring-shaped metal component, and the body of the special gasket has an axial elastic structure; the connecting bolt passes through the light holes of the valve shaft and the butterfly plate body in sequence, the special gasket is fitted onto the connecting bolt, and the inner key tooth is simultaneously embedded in the axial keyway a and the axial keyway b to achieve circumferential anti-rotation, and finally it is locked by the threaded hexagonal nut.

[0032] The axial elastic structure is a ring-shaped corrugation stamped onto a specially designed gasket body.

[0033] The specially designed gasket has a high-friction texture on the surface that contacts the disc body and the hexagonal nut.

[0034] The cross-sectional shape of the internal key teeth matches the cross-sectional shape of the axial keyway a and axial keyway b on the butterfly plate body and connecting bolts, forming a transition or small clearance fit.

[0035] In this embodiment, the connecting bolt is used as the main load-bearing and torque-transmitting element. The smooth part of the connecting bolt is precisely matched with the smooth hole 501 of the valve shaft 4 and the butterfly plate body. During operation, the torque is mainly transmitted by the shearing action between the smooth part surface and the hole wall. The path is direct and the rigidity is high. The special gasket is used to prevent rotation and provide elastic compensation. The inner key teeth of the special gasket are simultaneously engaged with the connecting bolt, the axial keyway a and the axial keyway b on the butterfly plate body, and the insertion of the key tooth extension end with the tooth groove 602. In the circumferential direction, the relative rotation possibility between the connecting bolt and the special gasket, and between the special gasket and the butterfly plate body is completely locked. This "double groove interlocking" structure constitutes the primary anti-rotation guarantee. The annular corrugation of the special gasket body provides continuous elastic compensation force when the hexagonal nut is tightened to maintain preload, and the high friction texture on the surface of the special gasket further enhances the anti-loosening effect.

[0036] Example 2

[0037] like Figures 7-8 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows:

[0038] The inner wall of the protruding end of the protruding tooth has multiple sets of glue storage grooves, which are evenly distributed. The special gasket has multiple sets of glue guiding grooves, which are arranged in a ring. The special gasket also has a connecting groove, which connects the multiple sets of glue guiding grooves.

[0039] One end of the multiple sets of adhesive guide grooves is an adhesive outlet, and the other end of the multiple sets of adhesive guide grooves is a flow-through outer wall groove. A lower adhesive groove is opened at the tail end of the flow-through outer wall groove.

[0040] A glue injection nozzle is provided on the outside of a set of glue outlet holes.

[0041] In this embodiment, after the syringe is connected to the dispensing nozzle, the microcapsule adhesive is injected into a set of adhesive guiding grooves, and then diverted to multiple sets of adhesive guiding grooves through a connecting groove. The microcapsule adhesive flows out from two outlets. Part of the microcapsule adhesive is squeezed out through the dispensing hole at one end of the multiple sets of adhesive guiding grooves, so that part of the microcapsule adhesive contacts the hexagonal nut 8. Another part of the microcapsule adhesive flows out from the outer wall groove along the flow, so that another part of the microcapsule adhesive flows along the multiple sets of inner key teeth 701. A small amount of microcapsule adhesive flowing in the outer wall groove will flow from the lower adhesive groove to the inner wall of the key tooth extension end 702 by gravity and extrusion pressure, and be contained by multiple sets of adhesive storage grooves. This achieves the application of adhesive between the connecting bolt and the special gasket, and between the special gasket and the butterfly plate body. The microcapsule adhesive further improves the connection effect and the buffering and shockproof ability of the connection, and the adhesive seals the connection structure, reducing the problem of corrosion and rust inside the connection structure.

[0042] Working principle

[0043] When connecting the butterfly plate body 5 and the valve shaft 4, the connecting bolts are passed through the light holes of the valve shaft and the butterfly plate body in sequence. The inner key teeth of the special gasket are aligned with the axial keyway a on the butterfly plate body and the axial keyway b on the connecting bolt and then fitted onto the connecting bolt. This allows the inner key teeth of the special gasket to be embedded in both the axial keyway a and the axial keyway b, thus completely locking the relative rotation possibility between the connecting bolt and the special gasket, and between the special gasket and the butterfly plate body in the circumferential direction.

[0044] Take out the syringe and add a measured amount of microcapsule adhesive. Connect the syringe to the dispensing nozzle and inject the microcapsule adhesive into a set of guide grooves. The adhesive is then diverted to multiple sets of guide grooves via a connecting groove. The microcapsule adhesive flows out from two outlets. Part of the microcapsule adhesive is squeezed out through the outlet hole at one end of the multiple sets of guide grooves, allowing some of the microcapsule adhesive to contact the hexagonal nut 8. Another part of the microcapsule adhesive flows out from the outer wall groove along the flow path, allowing another part of the microcapsule adhesive to flow onto the multiple sets of inner key teeth 701. A small amount of microcapsule adhesive flowing in the outer wall groove will flow from the lower adhesive groove to the inner wall of the key tooth extension end 702 by gravity and extrusion pressure, and will be contained by multiple sets of storage grooves.

[0045] After the colloid is injected, a hexagonal nut is screwed into the connecting bolt, bringing the hexagonal nut into contact with the special gasket. The hexagonal nut is repeatedly rotated to rub against the special gasket, generating heat through friction. This heat is transferred from the metal structure of the special gasket to the microcapsule adhesive, which is heated to improve the fluidity of the microcapsule adhesive and thus improve the coating efficiency. This achieves the coating between the connecting bolt and the special gasket, and between the special gasket and the butterfly plate body. The microcapsule adhesive further improves the connection effect and the shock absorption capacity of the connection. The colloid also seals the connection, reducing the problem of corrosion and rust inside the connection structure. Finally, the hexagonal nut is tightened by the thread to lock the connection, thus completing the connection between the butterfly plate body 5 and the valve shaft 4.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A butterfly plate valve shaft anti-loosening and vibration-resistant bolt connection structure for a marine high-temperature ventilation butterfly valve, comprising a valve body (1), characterized in that, It also includes a valve seat (2) on the valve body (1), a valve core (3) is installed on the valve seat (2), a valve shaft (4) is connected through the valve core (3), a butterfly plate body (5) is movably connected inside the valve body (1), a connecting bolt (6) is threaded on one side of the butterfly plate body (5), a special washer (7) is movably inserted into the tail end of the connecting bolt (6), and a hexagonal nut (8) is threaded into the tail end of the connecting bolt (6). Both the valve shaft (4) and the butterfly plate body (5) are provided with light holes (501), and one end of the light hole (501) is provided with a gasket groove (502). An axial keyway a (503) is provided on the inner side of the gasket groove (502); an axial keyway b (601) is provided on the connecting bolt (6), and a tooth groove (602) is provided at the tail end of the axial keyway b (601); an inner keyway (701) is provided on one side of the special gasket (7), and a keyway extension end (702) is provided on one side of the inner keyway (701). The special gasket (7) is a ring-shaped metal component, and an axial elastic structure is provided on the body of the special gasket (7). The connecting bolt (6) passes through the light hole (501) of the valve shaft (4) and the butterfly plate body (5) in sequence. The special gasket (7) is fitted on the connecting bolt (6) and the inner key tooth (701) is simultaneously embedded in the axial keyway a (503) and the axial keyway b (601) to achieve circumferential anti-rotation. Finally, the hexagonal nut (8) is threaded and locked.

2. The anti-loosening and vibration-resistant bolt connection structure of the butterfly plate valve shaft of a marine high-temperature ventilation butterfly valve according to claim 1, characterized in that, The axial elastic structure is an annular corrugation (703) stamped onto the body of the special gasket (7).

3. The anti-loosening and vibration-resistant bolt connection structure of the butterfly plate valve shaft of a marine high-temperature ventilation butterfly valve according to claim 1, characterized in that, The special gasket (7) has a high-friction texture on the surface that contacts the butterfly plate body (5) and the hexagonal nut (8).

4. The anti-loosening and vibration-resistant bolt connection structure of the butterfly plate valve shaft of a marine high-temperature ventilation butterfly valve according to claim 1, characterized in that, The cross-sectional shape of the inner key tooth (701) matches the cross-sectional shape of the axial keyway a (503) and axial keyway b (601) on the butterfly plate body (5) and the connecting bolt (6), forming a transition or small clearance fit.

5. The anti-loosening and vibration-resistant bolt connection structure of the butterfly plate valve shaft of a marine high-temperature ventilation butterfly valve according to claim 1, characterized in that, The inner wall of the protruding tooth extension end (702) has multiple sets of glue storage grooves (704), which are evenly distributed. The special gasket (7) has multiple sets of glue guiding grooves (705), which are annularly distributed. The special gasket (7) has a connecting groove (7051), which connects and communicates the multiple sets of glue guiding grooves (705).

6. The anti-loosening and vibration-resistant bolt connection structure of the butterfly plate valve shaft of a marine high-temperature ventilation butterfly valve according to claim 5, characterized in that, One end of the multiple sets of adhesive guide grooves (705) is an adhesive outlet (7052), and the other end of the multiple sets of adhesive guide grooves (705) is an outer wall groove (7053) along the flow. The tail end of the outer wall groove (7053) is provided with a lower adhesive groove (7054).

7. The anti-loosening and vibration-resistant bolt connection structure of the butterfly plate valve shaft of a marine high-temperature ventilation butterfly valve according to claim 6, characterized in that, A glue injection nozzle (706) is provided on the outside of one set of glue outlet holes (7052).

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