Butterfly valve with self-cleaning function

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve with a self-cleaning function, which comprises a valve body, and a sealing surface mounting groove is arranged in the valve body. The valve seat is arranged in the sealing surface mounting groove, and the valve seat is tightly attached to the inner wall of the valve body; the valve rod is arranged in the valve body, a butterfly plate rotating along with the valve rod is arranged outside the valve rod, and the butterfly plate is arranged between the sealing surface mounting grooves; a connecting protrusion of a stepped structure is arranged on the side, facing the valve seat, in the butterfly plate, a self-cleaning sealing mechanism is arranged at the position of the connecting protrusion and comprises a sealing ring and a pressing ring, the sealing ring is arranged on one side of the butterfly plate, the pressing ring is arranged on the outer side of the sealing ring, and the sealing ring is tightly pressed on one side of the butterfly plate through the pressing ring. The sealing ring is integrally arranged in the space between the valve seats, a cleaning scraper blade is arranged on the outer circle of the sealing ring, the cleaning scraper blade and the sealing ring are integrally formed, and scraper blade protrusions protruding towards the valve seats are arranged on the outer wall of the cleaning scraper blade.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field especially is involved in a butterfly valve from having clean function. BACKGROUND

[0002] Butterfly valve is a kind of valve that controls fluid flow by rotating butterfly plate, its core component is a disc-shaped butterfly plate, and it is opened or closed by rotating 90 degrees, to adjust or cut off fluid, at present, the Chinese patent with publication number CN205956416U discloses a kind of butterfly valve, it includes valve body and butterfly plate, butterfly plate is connected in valve body by valve stem, ceramic sealing ring is provided in valve body, ceramic sealing ring is provided on butterfly plate and is in contact with ceramic sealing ring.

[0003] In the butterfly valve structure: the central part of the ceramic sealing ring is provided with a teflon sealing ring, by the above setting, polytetrafluoroethylene has very high chemical inertness, main chain is stable, and is not easy to be attacked by reagent, has good chemical resistance, and has good temperature resistance, low viscosity, and high lubricity, it is arranged in the central position of ceramic sealing ring, can be contacted with ceramic sealing ring, because of good lubricity, it can facilitate the opening and closing of butterfly plate, reduce the wear of rigid contact between ceramics, and the sealing performance of teflon sealing ring is also higher, can effectively avoid gas and liquid from leaking between ceramic sealing ring and ceramic sealing ring;The service life of ceramic sealing ring and ceramic sealing ring is very long, after the sealing performance and wear resistance are improved, the service life of butterfly valve is longer.

[0004] In this butterfly valve, although the butterfly plate and the matching sealing structure are highly durable, the butterfly plate cannot clean the valve seat during the opening and closing process, and the valve seat surface accumulates medium crystallization or impurities, which can easily cause leakage problems at the valve seat sealing surface. UTILITY MODEL CONTENTS

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a butterfly valve from having clean function, and the above technical purpose is realized by the following technical scheme:

[0006] A butterfly valve from having clean function, comprising

[0007] Valve body, the inside of the valve body is provided with sealing surface installation groove;

[0008] Valve seat, set in sealing surface installation groove, and the valve seat is closely attached to the inner wall of valve body;

[0009] Valve stem, the valve stem is arranged in the valve body, the valve stem is provided with butterfly plate rotating along the valve stem, and the butterfly plate is arranged between the sealing surface installation groove;

[0010] The side of the butterfly plate facing the valve seat is provided with a connecting protrusion in a stepped structure, a self-cleaning sealing mechanism is arranged at the position of the connecting protrusion, the self-cleaning sealing mechanism comprises a sealing ring and a pressing ring, the sealing ring is arranged on one side of the butterfly plate, the pressing ring is arranged on the outer side of the sealing ring, and the pressing ring tightly compacts the sealing ring on one side of the butterfly plate, the sealing ring is integrally arranged in the space between the valve seats, the outer ring of the sealing ring is provided with a cleaning scraper, the cleaning scraper is integrally formed with the sealing ring, and the outer wall of the cleaning scraper is provided with a scraper protrusion protruding towards the valve seat.

[0011] Further, the length of the bottom surface of the pressing ring is smaller than the length of the top surface of the sealing ring, a sewage discharge gap is arranged between the pressing ring and the sealing ring, and a cleaning corner is arranged on the outer side of the pressing ring.

[0012] Further, the outer side of the pressing ring is provided with a mounting bolt penetrating through the pressing ring and the sealing ring in sequence.

[0013] Further, a butterfly plate sealing ring is arranged between the butterfly plate and the sealing ring.

[0014] Further, a valve seat sealing ring is arranged between the valve seat and the valve body.

[0015] Further, a lifting ring is arranged at the position outside the valve seat in the valve body, and a compacting bolt penetrating through the lifting ring structure and compacting the valve seat is arranged in the lifting ring.

[0016] In summary, the utility model has the following beneficial effects:

[0017] The scraper protrusions arranged on the two sides of the butterfly plate in the butterfly valve are in a blade-shaped structure, the scraper protrusions can be attached to the valve seat to form a seal, and can repeatedly clean the surface of the valve seat during each opening and closing of the butterfly plate, so that the purpose of cleaning the medium crystals or impurities on the valve seat wall is achieved, the cleanliness of the sealing surface is effectively ensured, and the probability of leakage caused by crystals or impurities at the sealing surface of the valve seat is greatly reduced.

[0018] The contact surface between the scraper protrusion and the valve seat is small, and the low friction characteristics between the scraper protrusion and the valve seat effectively prolong the service life of the valve while ensuring effective sealing.

[0019] The cleaning corner arranged on the butterfly plate can compensate for the position of the outer wall of the valve seat that cannot be scraped by the scraper protrusion, and the valve seat is scraped again when the butterfly plate rotates. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the utility model and constitute a part of the present application, but do not constitute an improper limitation on the utility model, and in the drawings:

[0021] Figure 1It is the whole structure schematic diagram of the utility model;

[0022] Figure 2 It is the whole structure schematic diagram of the utility model Figure 1 It is the enlarged schematic view of A place in the utility model.

[0023] In the drawing, 1, valve body;2, valve seat;3, valve stem;4, butterfly plate;5, connecting protrusion;6, sealing ring;7, pressing ring;8, cleaning scraper;9, blowdown gap;10, cleaning corner;11, mounting bolt;12, butterfly plate sealing ring;13, valve seat sealing ring;14, lifting ring;15, compaction bolt. Specific implementation

[0024] The foregoing and other technical contents, features and effects of the utility model, in combination with the accompanying drawings, will be described below. Figure 1 to the accompanying drawings Figure 2 The detailed description of the embodiments will be clearly presented.

[0025] The various exemplary embodiments of the utility model will be described below with reference to the accompanying drawings. Embodiment

[0026] A butterfly valve with a cleaning function, the butterfly valve structure includes valve body 1, valve seat 2 and valve stem 3, the inside of valve body 1 is provided with sealing surface installation groove, sealing surface installation groove is used to install valve seat 2, valve stem 3 and matched sealing structure, valve seat 2 is arranged in the inside of valve body 1, and valve seat 2 is arranged in sealing surface installation groove, the whole valve seat 2 is arranged tightly against the inner wall of valve body 1, valve stem 3 is also arranged in the inside of valve body 1, the outside of valve stem 3 is provided with butterfly plate 4 that rotates along with valve stem 3, butterfly plate 4 is arranged between sealing surface installation groove.

[0027] In the above structure, valve stem 3 drives whole butterfly plate 4 to rotate, when butterfly plate 4 rotates, sealing cooperation between butterfly plate 4 and valve seat 2 is generated, when butterfly plate 4 rotates to different angles, the opening and closing of the flow in valve body 1 and flow are controlled.

[0028] The side of butterfly plate 4 towards valve seat 2 is provided with connecting protrusion 5 in ladder structure, connecting protrusion 5 is provided with self-cleaning sealing mechanism at the position, self-cleaning sealing structure is arranged on butterfly plate 4 as a whole, the structure in the whole mechanism rotates synchronously along with butterfly plate 4.

[0029] Specifically, the self-cleaning sealing structure comprises a sealing ring 6 and a pressing ring 7, the sealing ring 6 is arranged on one side of the butterfly plate 4, the pressing ring 7 is arranged outside the sealing ring 6, and the pressing ring 7 tightly compacts the sealing ring 6 on one side of the butterfly plate 4 to form a fixation of the sealing ring 6, and the sealing ring 6 is arranged in the space between the valve seats 2, in this embodiment, the butterfly plate 4 does not directly seal with the valve seats 2, but a sealing surface of the valve seat 2 is formed between the sealing ring 6 and the valve seat 2.

[0030] The outer ring position of the sealing ring 6 is provided with a cleaning scraper 8, the cleaning scraper 8 is integrally formed with the sealing ring 6, the outer wall of the cleaning scraper 8 is provided with a scraper protrusion protruding towards the valve seat 2, the scraper protrusion is in a knife blade shape structure, the scraper protrusion can be in close contact with the valve seat 2 to form a seal, and can repeatedly clean the surface of the valve seat 2 during each opening and closing of the butterfly plate 4, so as to achieve the purpose of cleaning the medium crystallization or impurities on the wall of the valve seat 2, effectively ensure the cleanliness of the sealing surface, greatly reduce the probability of leakage caused by crystallization or impurities at the sealing surface of the valve seat 2, and the low friction characteristic between the scraper protrusion and the valve seat 2 also effectively prolongs the service life of the valve.

[0031] The length of the bottom surface of the pressing ring 7 is less than the length of the top surface of the sealing ring 6, a pollution discharge gap 9 is formed between the pressing ring 7 and the sealing ring 6, and the outer side of the pressing ring 7 is provided with a cleaning corner 10, during the rotation of the butterfly plate 4, the cleaning corner 10 on the outer side of the pressing ring 7 will secondarily scrape the outer wall of the valve seat 2, and the cleaning corner 10 can scrape the outer wall of the valve seat 2 closer to the outer side position of the valve body 1, further improving the self-cleaning ability.

[0032] Optionally, the outer side of the pressing ring 7 is provided with a mounting bolt 11 penetrating the pressing ring 7 and the sealing ring 6 in sequence, and the mounting bolt 11 firmly fixes the pressing ring 7 and the sealing ring 6 on the outer side of the butterfly plate 4.

[0033] Optionally, a butterfly plate sealing ring 12 is arranged between the butterfly plate 4 and the sealing ring 6.

[0034] Optionally, a valve seat sealing ring 13 is arranged between the valve seat 2 and the valve body 1, and the valve seat sealing ring 13 is arranged in a reserved groove of the valve body 1.

[0035] Optionally, a lifting ring 14 is arranged inside the valve body 1 and at the outer side position of the valve seat 2, and a compacting bolt 15 penetrating the structure of the lifting ring 14 and pressing the valve seat 2 is arranged in the lifting ring 14.

[0036] The above is a further detailed description of the present application in combination with the specific embodiments, and cannot be regarded as the limitation of the specific embodiments of the present application; for the skilled in the art and related technical field, the expansion, operation method and data replacement made on the basis of the technical scheme of the present application should be within the protection scope of the present application.

Claims

1. A butterfly valve with a cleaning function, characterized in that: The utility model relates to a butterfly valve, including The valve body (1) is internally provided with sealing surface installation groove; The valve seat (2) is arranged in the sealing surface installation groove, and the valve seat (2) is arranged closely to the inner wall of the valve body (1); The valve stem (3) is arranged in the inside of the valve body (1), and the outside of the valve stem (3) is provided with the butterfly plate (4) that rotates along with the valve stem (3), and the butterfly plate (4) is arranged between the sealing surface installation groove; The side of the butterfly plate (4) towards the valve seat (2) is provided with the connecting protrusion (5) of ladder structure, the position of the connecting protrusion (5) is provided with the self-cleaning sealing mechanism, the self-cleaning sealing structure includes sealing ring (6), compression ring (7), the sealing ring (6) is arranged on one side of the butterfly plate (4), the compression ring (7) is arranged on the outside of the sealing ring (6), and the compression ring (7) tightly compacts the sealing ring (6) on one side of the butterfly plate (4), the sealing ring (6) is arranged in the space between the valve seat (2) as a whole, the outer ring of the sealing ring (6) is provided with the cleaning scraper (8), the cleaning scraper (8) is integrally formed with the sealing ring (6), and the outer wall of the cleaning scraper (8) is provided with the scraper protrusion that protrudes towards the valve seat (2).

2. The butterfly valve with cleaning function according to claim 1, characterized in that: The length of the bottom surface of the compression ring (7) is less than the length of the top surface of the sealing ring (6), and the discharge gap (9) is formed between the compression ring (7) and the sealing ring (6), and the outside of the compression ring (7) is provided with the cleaning corner (10).

3. The butterfly valve with cleaning function according to claim 2, characterized in that: The outside of the compression ring (7) is provided with the mounting bolt (11) that penetrates the compression ring (7) and the sealing ring (6) in sequence.

4. The self-cleaning butterfly valve according to claim 2, wherein: The butterfly plate sealing ring (12) is arranged between the butterfly plate (4) and the sealing ring (6).

5. The self-cleaning butterfly valve according to claim 2, wherein: The valve seat sealing ring (13) is arranged between the valve seat (2) and the valve body (1).

6. The butterfly valve with cleaning function according to claim 5, characterized in that: The inside of the valve body (1) is provided with the lifting ring (14) at the outside position of the valve seat (2), and the compaction bolt (15) that penetrates the structure of the lifting ring (14) and compacts the valve seat (2) is arranged in the lifting ring (14).

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