Leak-proof sealing type butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a leakproof sealing type butterfly valve which comprises a valve body, a valve mechanism is installed in the valve body, a connecting shaft is fixed to the center of the inner side of the valve mechanism in a penetrating mode, and the connecting shaft is rotationally connected with the valve body. The valve mechanism comprises a valve plate, supporting rings are fixed to the two sides of the middle of the outer wall of the valve plate, anti-leakage sealing pieces are fixed to the outer portions of the supporting rings, wear-resisting contact mechanisms are welded to the edges of the two sides of the outer wall of the valve plate and attached to the anti-leakage sealing pieces, and rubber rings are fixed to the inner sides of the wear-resisting contact mechanisms. The abrasion-resistant contact mechanism comprises an abrasion-resistant ring, and the lower surface of the abrasion-resistant ring is connected with the valve plate in a welded mode. Particles on the inner wall of the valve body are effectively scraped away through the abrasion-resistant contact mechanism, and the leakage-proof sealing piece is prevented from being ground; the anti-leakage sealing piece enhances the fitting and anti-deformation capacities through a buffer structure; and the supporting ring anti-falling piece guarantees complete sealing, and the sealing and wear-resisting performance is comprehensively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field, concretely is a kind of leakproof sealing butterfly valve. BACKGROUND

[0002] In the ore pulp conveying system of mining and metallurgical industry, as key on-off control component, butterfly valve needs to bear the scour of ore pulp containing high-hardness quartz sand and iron ore particles for a long time, and the working condition is often accompanied by 40-60 ℃ medium temperature and 0.8-1.2 MPa pressure environment, which puts forward high requirements for sealing wear resistance and reliability;

[0003] In the prior art, the sealing of such butterfly valve for ore pulp conveying is realized by driving the transmission shaft with a rudder motor, rotating the gate plate in the valve body, and tightly adhering the sealing gasket fixed on the side of the gate plate to the inner wall of the valve body to block the ore pulp flow path.

[0004] However, the sealing structure has a fatal defect in the ore pulp conveying scene: when the gate plate is opened and closed, the sealing gasket side needs to continuously adhere and slide with the valve body inner wall, and the high-hardness solid particles suspended in the ore pulp will embed into the contact gap between the sealing gasket and the valve body inner wall, converting the original sliding friction into severe "grinding friction". Since the sealing gasket side is a stress-concentrated edge part, the effective bearing area is small, and under the repeated grinding action of the particles, wear, chipping and even edge peeling will occur first, leading to rapid failure of the sealing surface and causing ore pulp leakage.

[0005] Therefore, a leakproof sealing butterfly valve is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a leakproof sealing butterfly valve to solve the problems raised in the background.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A leakproof sealing butterfly valve, comprising a valve body, a valve mechanism is installed inside the valve body, a connecting shaft is fixed through the center of the inner side of the valve mechanism, and the connecting shaft is rotationally connected with the valve body; the valve mechanism comprises a valve plate, support rings are fixed on both sides of the middle part of the outer wall of the valve plate, a leakproof sealing piece is fixed outside the support rings, wear-resistant contact mechanisms are welded and connected at the edges of both sides of the outer wall of the valve plate, the wear-resistant contact mechanisms are mutually adhered with the leakproof sealing piece, and rubber rings are fixed inside the wear-resistant contact mechanisms; the wear-resistant contact mechanism comprises a wear-resistant ring, the lower surface of the wear-resistant ring is welded and connected with the valve plate, a matching groove is formed on one side of the outer wall of the wear-resistant ring, a scraping ring is integrally formed outside the wear-resistant ring, and a contact piece is integrally formed on the other side of the outer wall of the wear-resistant ring.

[0009] As the further optimization of the utility model, wherein: the leakage-proof sealing piece includes a rubber sealing ring, contact grooves are formed on both sides of the outer part of the rubber sealing ring, a contact convex ring is integrally formed on the middle part of the outer part of the rubber sealing ring, a plurality of buffer grooves are formed on both sides of the outer wall of the rubber sealing ring, the shaft centers of the buffer grooves and the shaft center of the rubber sealing ring are located on the same straight line, buffer cavities with the same shaft center are formed on the inner side of the rubber sealing ring, and two mounting grooves are formed on the lower surface of the rubber sealing ring.

[0010] As the further optimization of the utility model, wherein: the leakage-proof sealing piece includes a rubber sealing ring, contact grooves are formed on both sides of the outer part of the rubber sealing ring, a contact convex ring is integrally formed on the middle part of the outer part of the rubber sealing ring, a plurality of buffer grooves are formed on both sides of the outer wall of the rubber sealing ring, the shaft centers of the buffer grooves and the shaft center of the rubber sealing ring are located on the same straight line, buffer cavities with the same shaft center are formed on the inner side of the rubber sealing ring, and two mounting grooves are formed on the lower surface of the rubber sealing ring.

[0011] As the further optimization of the utility model, wherein: the leakage-proof sealing piece includes a rubber sealing ring, contact grooves are formed on both sides of the outer part of the rubber sealing ring, a contact convex ring is integrally formed on the middle part of the outer part of the rubber sealing ring, a plurality of buffer grooves are formed on both sides of the outer wall of the rubber sealing ring, the shaft centers of the buffer grooves and the shaft center of the rubber sealing ring are located on the same straight line, buffer cavities with the same shaft center are formed on the inner side of the rubber sealing ring, and two mounting grooves are formed on the lower surface of the rubber sealing ring.

[0012] As the further optimization of the utility model, wherein: the leakage-proof sealing piece includes a rubber sealing ring, contact grooves are formed on both sides of the outer part of the rubber sealing ring, a contact convex ring is integrally formed on the middle part of the outer part of the rubber sealing ring, a plurality of buffer grooves are formed on both sides of the outer wall of the rubber sealing ring, the shaft centers of the buffer grooves and the shaft center of the rubber sealing ring are located on the same straight line, buffer cavities with the same shaft center are formed on the inner side of the rubber sealing ring, and two mounting grooves are formed on the lower surface of the rubber sealing ring.

[0013] As the further optimization of the utility model, wherein: the leakage-proof sealing piece includes a rubber sealing ring, contact grooves are formed on both sides of the outer part of the rubber sealing ring, a contact convex ring is integrally formed on the middle part of the outer part of the rubber sealing ring, a plurality of buffer grooves are formed on both sides of the outer wall of the rubber sealing ring, the shaft centers of the buffer grooves and the shaft center of the rubber sealing ring are located on the same straight line, buffer cavities with the same shaft center are formed on the inner side of the rubber sealing ring, and two mounting grooves are formed on the lower surface of the rubber sealing ring.

[0014] As the further optimization of the utility model, wherein: the leakage-proof sealing piece includes a rubber sealing ring, contact grooves are formed on both sides of the outer part of the rubber sealing ring, a contact convex ring is integrally formed on the middle part of the outer part of the rubber sealing ring, a plurality of buffer grooves are formed on both sides of the outer wall of the rubber sealing ring, the shaft centers of the buffer grooves and the shaft center of the rubber sealing ring are located on the same straight line, buffer cavities with the same shaft center are formed on the inner side of the rubber sealing ring, and two mounting grooves are formed on the lower surface of the rubber sealing ring.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] In the utility model, the wear-resistant contact mechanism cooperates with the leakage-proof sealing piece, the scraping ring of the wear-resistant contact mechanism scrapes the particles on the inner wall of the valve body, and the abrasion-resistant sealing piece is avoided; the buffer grooves and the buffer cavities of the leakage-proof sealing piece absorb pressure impact, and the fitting reliability is enhanced; the anti-falling piece of the supporting ring prevents the sealing piece from falling off, thereby greatly improving the sealing stability and wear resistance of the butterfly valve under harsh working conditions and prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the split structure schematic view of the whole utility model;

[0018] Figure 2 It is the split structure schematic view of the valve mechanism of the utility model;

[0019] Figure 3 It is the cross section structure schematic view of the wear-resistant contact mechanism of the utility model;

[0020] Figure 4 It is the cross section structure schematic view of the wear-resistant contact mechanism of the utility model; Figure 3

[0021] Figure 5 It is the cross section structure schematic view of the wear-resistant contact mechanism of the utility model;

[0022] Figure 6 It is the cross section structure schematic view of the wear-resistant contact mechanism of the utility model;

[0023] Figure 7 It is the cross section structure schematic view of the wear-resistant contact mechanism of the utility model; Figure 5

[0024] In the drawing: 1, valve body;2, steering gear;3, valve mechanism;4, connecting shaft;5, matching cavity;

[0025] 31, valve plate;32, support ring;321, anti-dropping piece;

[0026] 33, leakage-proof sealing piece;331, rubber sealing ring;332, contact groove;333, contact convex ring;334, buffer groove;335, buffer cavity;336, installation groove;

[0027] 34, wear-resistant contact mechanism;341, wear-resistant ring;342, matching groove;343, scraping ring;344, contact piece;

[0028] 35, rubber ring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0031] Please refer to Figures 1-7 ​​The utility model provides a technical scheme:

[0032] A kind of leakage-proof sealed butterfly valve, valve body 1 is included, valve body 1 inside is equipped with valve mechanism 3, the center of the inside of valve mechanism 3 is fixed with connecting shaft 4, and connecting shaft 4 is rotatably connected with valve body 1;Valve mechanism 3 includes valve plate 31, both sides of the middle part of the outer wall of valve plate 31 are fixed with support ring 32, the outside of support ring 32 is fixed with leakage-proof sealing element 33, and the edge of the both sides of the outer wall of valve plate 31 is welded with wear-resistant contact mechanism 34, wear-resistant contact mechanism 34 and leakage-proof sealing element 33 are mutually pasted, and the inside of wear-resistant contact mechanism 34 is fixed with rubber ring 35;Wear-resistant contact mechanism 34 includes wear-resistant ring 341, and the lower surface of wear-resistant ring 341 is welded with valve plate 31, and one side of the outer wall of wear-resistant ring 341 is provided with cooperation groove 342, and the outside of wear-resistant ring 341 is integrally formed with scraping ring 343, and the other side of the outer wall of wear-resistant ring 341 is integrally formed with contact piece 344.

[0033] Further explanation, through the collaborative design of valve plate 31, support ring 32, leakage-proof sealing element 33 and wear-resistant contact mechanism 34, in the solid particle medium scene such as ore pulp, scraping ring 343 of wear-resistant contact mechanism 34 first contacts valve body 1 and scrapes off particles, avoids that particle directly grinds leakage-proof sealing element 33, leakage-proof sealing element 33 realizes reliable sealing by multiple structures, and rubber ring 35 compensates the elastic attenuation of wear-resistant ring 341, solves the problem that the side of the sealing pad of traditional butterfly valve is rapidly abraded and leaks due to particle grinding, greatly improves the sealing stability and wear resistance of butterfly valve under harsh working conditions, and prolongs the service life of leakage-proof sealing element 33 and wear-resistant contact mechanism 34;

[0034] As a further implementation of the scheme, leakage-proof sealing element 33 includes rubber sealing ring 331, both sides of the outside of rubber sealing ring 331 are provided with contact groove 332, contact convex ring 333 is integrally formed in the middle part of the outside of rubber sealing ring 331, a plurality of buffer grooves 334 are formed in the both sides of the outer wall of rubber sealing ring 331, the axis of a plurality of buffer grooves 334 and the axis of rubber sealing ring 331 are located on the same straight line, buffer cavity 335 with the same axis is formed in the inside of rubber sealing ring 331, one side of buffer cavity 335 close to contact convex ring 333 is protruding structure, two installation grooves 336 are formed in the lower surface of rubber sealing ring 331, and two installation grooves 336 are located on the both sides of buffer cavity 335;

[0035] Further explanation, the buffer groove 334 cooperates with the buffer cavity 335 to absorb pressure impact, avoid local stress concentration of the rubber sealing ring 331, adapt to pressure fluctuation and particle impact of the ore pulp medium, both enhance the adhesion reliability of the contact convex ring 333 and the valve body 1, and improve the anti-deformation ability of the rubber sealing ring 331, prevent the sealing surface from generating a gap due to uneven pressure or vibration, further optimize the anti-leakage effect, prolong the service life of the rubber sealing ring 331, and adapt to long-term high-strength operation scenes such as mining and metallurgy;

[0036] As a further embodiment of the present scheme, the outer side of the contact piece 344 is arc-shaped, the axis of the contact piece 344 is on the same straight line as the axis of the wear-resistant ring 341, and the contact piece 344 is in close contact with the contact groove 332 of the anti-leakage sealing piece 33.

[0037] Specifically, the deformation force of the wear-resistant ring 341 is uniformly transmitted to the contact groove 332 of the rubber sealing ring 331 through the contact piece 344, at this time, the plurality of buffer grooves 334 opened on both sides of the outer wall of the rubber sealing ring 331 will absorb the pressure through the elastic deformation of itself, avoiding local damage of the rubber sealing ring 331 caused by pressure concentration;

[0038] As a further embodiment of the present scheme, the support ring 32 is integrally formed with anti-dropping pieces 321 at both edges of the outer wall, the axis of the anti-dropping pieces 321 is on the same straight line as the axis of the support ring 32, the anti-dropping pieces 321 are adhesively fixed to the inner side of the mounting groove 336, and the vertical section of the anti-dropping pieces 321 is T-shaped, which effectively prevents the anti-leakage sealing piece 33 from falling off the support ring 32, ensures the structural integrity of the sealing system under high-impact conditions of the ore pulp, and avoids leakage hazards;

[0039] As a further embodiment of the present scheme, the upper part of the valve body 1 is fixed with a steering engine 2 through a mounting seat, the transmission shaft of the steering engine 2 extends into the interior of the valve body 1, and the transmission shaft of the steering engine 2 is fixedly connected with the center of the top end of the connecting shaft 4, the connecting shaft 4 is located between the two rubber sealing rings 331, and the top and bottom of the connecting shaft 4 are both provided with a matching cavity 5 for adapting to the rubber sealing ring 331;

[0040] Specifically, the matching cavity 5 of the connecting shaft 4 adapts to the rubber sealing ring 331, blocks the gap between the connection parts, prevents medium leakage, and does not interfere with the sealing function.

[0041] Workflow: When the butterfly valve needs to be opened or closed, the rudder 2 installed on the valve body 1 is started, the transmission shaft of the rudder 2 extends into the inside of the valve body 1, and is fixedly connected with the top end of the connecting shaft 4 at the inside center of the valve mechanism 3. The output torque of the rudder 2 drives the connecting shaft 4 to rotate around its own axis. Since the connecting shaft 4 penetrates and is fixed to the valve plate 31 of the valve mechanism 3, and the connecting shaft 4 is rotationally connected with the valve body 1, the connecting shaft 4 will synchronously drive the valve plate 31 and the support ring 32, the anti-leakage sealing element 33, the wear-resistant contact mechanism 34 and the rubber ring 35 fixed on the valve plate 31 to rotate as a whole, thereby opening or closing the medium flow passage inside the valve body 1. At the same time, the matching cavities 5 at the top and bottom of the connecting shaft 4 are always adapted with the rubber sealing rings 331 on both sides, so as to ensure the stability of the relative position between the connecting shaft 4 and the anti-leakage sealing element 33 during rotation;

[0042] During the rotation of the valve plate 31 and the components driven thereby, the wear-resistant contact mechanism 34 welded to the edges of the outer wall of the valve plate 31 first contacts the inner wall of the valve body 1. Specifically, the scraping ring 343 integrally formed on the outside of the wear-resistant ring 341 slides in contact with the inner wall of the valve body 1 as the valve plate 31 rotates. The scraping ring 343 has a rigid structure, which scrapes off high-hardness solid particles, such as quartz sand and iron ore particles in the ore slurry, adhering to the inner wall of the valve body 1, so as to avoid the particles from entering the subsequent sealing surface and causing abrasive damage. At the same time, the matching groove 342 increases the contact space between the particles and the scraping ring 343, and can also accommodate the scraped solid particles. When the valve is opened and the medium flows, the accommodated particles will be naturally flushed out with the medium, without the need for additional cleaning.

[0043] As the valve plate 31 continues to rotate, the fitting pressure between the wear-resistant contact mechanism 34 and the inner wall of the valve body 1 gradually increases, and the wear-resistant ring 341 is elastically deformed due to the extrusion. Since the contact piece 344 integrally formed on the other side of the outer wall of the wear-resistant ring 341 is in mutual contact with the contact groove 332 of the anti-leakage sealing element 33, and the contact piece 344 is arranged in an arc shape on the outside of the wear-resistant ring 341 and coaxially with the wear-resistant ring 341, the deformation force of the wear-resistant ring 341 will be uniformly transmitted to the contact groove 332 of the rubber sealing ring 331 through the contact piece 344. At this time, the plurality of buffer grooves 334 opened on the two sides of the outer wall of the rubber sealing ring 331 will absorb this pressure through elastic deformation, so as to avoid local damage to the rubber sealing ring 331 caused by pressure concentration. At the same time, the V-shaped rubber ring 35 fixed on the inside of the wear-resistant ring 341 will also elastically deform synchronously, providing a counter-buffering support for the wear-resistant ring 341, compensating for the elastic attenuation of the wear-resistant ring 341 after long-term use, and ensuring the stability and continuity of pressure transmission.

[0044] When the valve plate 31 rotates to the closed position, the contact convex ring 333 integrally formed in the middle of the outer part of the rubber sealing ring 331 tightly abuts against the inner wall of the valve body 1 under the action of the previous pressure transmission, forming the first sealing surface and blocking the medium flow path, at the same time, the buffer cavity 335 opened in the inner side of the rubber sealing ring 331 is coaxial and the side close to the contact convex ring 333 is protruding, which can provide sufficient elastic support, so that the contact convex ring 333 always maintains the abutting pressure with the inner wall of the valve body 1, even when the medium pressure fluctuates or slightly vibrates, the clearance can be compensated by the deformation of the buffer cavity 335 to avoid sealing failure, in addition, the wear-resistant contact mechanism 34 always abuts the outer side of the anti-leakage sealing piece 33 to form a "wear-resistant protective layer" to prevent solid particles from directly impacting the friction contact convex ring 333, further ensuring the integrity of the sealing surface;

[0045] During the whole valve opening and closing and sealing process, the support ring 32 always provides basic support for the anti-leakage sealing piece 33, the T-shaped anti-falling piece 321 integrally formed at the two edges of the outer wall of the support ring 32 is bonded and fixed with the two installation grooves 336 opened in the lower surface of the rubber sealing ring 331 to form a reliable anti-falling structure, which avoids the anti-leakage sealing piece 33 from falling off from the support ring 32 under the action of long-term rotation, medium scouring and pressure, and the structure ensures the connection stability of the anti-leakage sealing piece 33 with the support ring 32 and the valve plate 31, so that the whole valve mechanism 3 maintains the structural integrity in the repeated opening and closing cycle, and guarantees the sealing reliability and anti-leakage effect in long-term use;

[0046] When the valve needs to be opened again, the steering wheel 2 drives the connecting shaft 4 to rotate in the opposite direction, driving the valve plate 31 and each component to move in the opposite direction, the contact convex ring 333 separates from the inner wall of the valve body 1, and the medium resumes flowing, and the particles received in the cooperation groove 342 are discharged with the medium.

[0047] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A leak-tight sealed butterfly valve comprising a valve body (1), characterized in that, The valve body (1) is internally provided with a valve mechanism (3), and a connecting shaft (4) is fixedly arranged at the center of the inner side of the valve mechanism (3) and rotationally connected with the valve body (1). The valve mechanism (3) comprises a valve plate (31), both sides of the middle part of the outer wall of the valve plate (31) are fixedly provided with support rings (32), the outer part of the support ring (32) is fixedly provided with a leakage-proof sealing element (33), the edges of both sides of the outer wall of the valve plate (31) are weldedly connected with wear-resistant contact mechanisms (34), the wear-resistant contact mechanisms (34) are mutually attached with the leakage-proof sealing element (33), and the inner side of the wear-resistant contact mechanism (34) is fixedly provided with a rubber ring (35). The wear-resistant contact mechanism (34) comprises a wear-resistant ring (341), the lower surface of the wear-resistant ring (341) is weldedly connected with the valve plate (31), one side of the outer wall of the wear-resistant ring (341) is provided with a matching groove (342), the outer part of the wear-resistant ring (341) is integrally formed with a scraping ring (343), and the other side of the outer wall of the wear-resistant ring (341) is integrally formed with a contact element (344).

2. A leak-tight sealed butterfly valve according to claim 1, characterized in that: The leakage-proof sealing element (33) comprises a rubber sealing ring (331), both sides of the outer part of the rubber sealing ring (331) are provided with contact grooves (332), the middle part of the outer part of the rubber sealing ring (331) is integrally formed with a contact convex ring (333), both sides of the outer wall of the rubber sealing ring (331) are provided with a plurality of buffer grooves (334), the shaft centers of the plurality of buffer grooves (334) are located on the same straight line as the shaft center of the rubber sealing ring (331), the inner side of the rubber sealing ring (331) is provided with buffer cavities (335) with the same shaft center, and the lower surface of the rubber sealing ring (331) is provided with two mounting grooves (336).

3. A leak-tight sealed butterfly valve according to claim 2, characterized in that: The side of the buffer cavity (335) close to the contact convex ring (333) is in a convex structure, and the two mounting grooves (336) are located on both sides of the buffer cavity (335), respectively.

4. A leak-tight sealed butterfly valve according to claim 1, characterized in that: The outer side of the contact element (344) is in an arc structure, the shaft center of the contact element (344) is located on the same straight line as the shaft center of the wear-resistant ring (341), and the contact element (344) is mutually attached with the contact groove (332) of the leakage-proof sealing element (33).

5. A leak-tight sealed butterfly valve according to claim 1, characterized in that: The outer wall of the support ring (32) is integrally formed with anti-disengagement elements (321) at the two edges, the shaft center of the anti-disengagement element (321) is located on the same straight line as the shaft center of the support ring (32), the anti-disengagement element (321) is adhesively fixed to the inner side of the mounting groove (336), and the vertical section of the anti-disengagement element (321) is in a T shape.

6. A leak-tight sealed butterfly valve according to claim 1, characterized in that: The upper part of the valve body (1) is fixedly provided with a steering engine (2) through a mounting seat, the transmission shaft of the steering engine (2) extends into the inside of the valve body (1), and the transmission shaft of the steering engine (2) is fixedly connected with the center of the top end of the connecting shaft (4).

7. A leak-tight sealed butterfly valve according to claim 1, characterized in that: The connecting shaft (4) is located between the two rubber sealing rings (331), and the top and the bottom of the connecting shaft (4) are provided with matching cavities (5) for adapting the rubber sealing ring (331).

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