Automatic compensation wear-resistant two-way butterfly valve

Abstract

The utility model discloses an automatic compensation wear-resisting two-way butterfly valve, which relates to the technical field of butterfly valves and comprises a butterfly valve body, a valve seat is mounted at the top end of the butterfly valve body, a valve rod is rotatably connected in the valve seat, and the bottom end of the valve rod extends into the butterfly valve body and is provided with a butterfly plate. First flanges are installed on the left side and the right side of the butterfly valve body correspondingly, second flanges are installed on the sides, away from the butterfly valve body, of the first flanges through bolts correspondingly, and automatic compensation mechanisms for enhancing sealing are arranged between the first flanges and the second flanges. According to the self-compensation wear-resistant two-way butterfly valve, when the first flange and the second flange are attached to each other for connection, gas in the inflation sealing layer is conveyed into the elastic air bag through the hose, and the elastic sealing pairs arranged on the inner sides of the first flange and the second flange can press the elastic air bag; and the elastic sealing pair and the elastic air bag are used for filling a gap at the joint of the first flange and the second flange, so that an automatic compensation effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field, concretely is a kind of automatic compensation wear-resistant bidirectional butterfly valve. BACKGROUND

[0002] The butterfly valve is also called flap valve or butterfly valve, and is a simple structure regulating valve, which is mainly composed of valve body, valve stem, butterfly plate and other components. Among them, the valve body is the main part of the valve, the valve stem is used to connect the butterfly plate and the driving device, and the butterfly plate is the key component for opening and closing operation.

[0003] In use, the connection of the butterfly valve is prone to leakage due to sealing wear, which reduces the applicability of the butterfly valve.

[0004] To overcome the above-mentioned defects, the prior art (the publication number of Chinese patent is CN213685320U, the publication date is 2020-11-10) is an automatic compensation wear-resistant bidirectional sealing butterfly valve. The valve seat adopts an automatic compensation movable valve seat, which is composed of a U-shaped elastic sealing seat, a pressing plate and an adjusting screw. The U-shaped elastic sealing seat is composed of a left side flat bottom connected with a semicircular arc. The left side flat surface is installed in the left plane of the radial shoulder in the valve body channel by the pressing plate and the adjusting screw. The right side end surface of the semicircular arc is pressed on the inner hole wall of the radial shoulder. After the sealing pair is worn, the adjusting screw on the valve seat is adjusted to compress the U-shaped elastic sealing seat. The elastic force generated by the U-shaped elastic sealing seat automatically compensates for the wear of the sealing pair, re-forms a good seal, and has the advantages of reliable sealing, low product maintenance cost and long service life.

[0005] The above-mentioned mechanism automatically compensates the automatic sealing pair of the connection by using the automatic compensation sealing mechanism. However, in actual use, the U-shaped elastic sealing seat will deform under long-term extrusion, which will weaken the sealing performance. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing an automatic compensation wear-resistant bidirectional butterfly valve to solve the problem of leakage at the connection of the butterfly valve due to sealing wear, which reduces the applicability of the butterfly valve.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an automatic compensation wear-resistant bidirectional butterfly valve, which comprises a butterfly valve body, a valve seat installed at the top end of the butterfly valve body, a valve stem rotationally connected inside the valve seat, a butterfly plate installed at the bottom end of the valve stem extending into the butterfly valve body, first flanges installed on the left and right sides of the butterfly valve body, second flanges installed on the side away from the butterfly valve body of the first flanges through bolts, and a connecting pipe arranged on the right side of the second flange.

[0008] The left side of the second flange is provided with a sealing cover plate, and an automatic compensation mechanism for enhancing sealing is arranged between the first flange and the second flange, the automatic compensation mechanism comprises an inflatable sealing layer, and the inflatable sealing layer is arranged outside the joint of the first flange and the second flange, the inner side of the inflatable sealing layer is connected with an elastic air bag through a hose, the gas in the inflatable sealing layer is transported to the inside of the elastic air bag through the hose, and the elastic sealing pair arranged on the inner side of the first flange and the second flange can press the elastic air bag, so that the elastic sealing pair and the elastic air bag fill the gap at the joint of the first flange and the second flange, thereby playing an automatic compensation role.

[0009] The top end of the valve rod penetrates and extends to the top end of the valve seat, and a stroke limiting mechanism for limiting the angle of the butterfly plate is arranged at the lower end outside the valve seat.

[0010] Further, the left and right sides of the elastic air bag are attached with elastic sealing pairs, and the elastic sealing pairs are arranged on the opposite sides of the first flange and the second flange.

[0011] Further, the diameter of the elastic sealing pair is greater than the diameter of the elastic air bag, and the hoses are distributed at equal angles outside the elastic air bag.

[0012] Further, the stroke limiting mechanism comprises a limiting groove, and the limiting groove is arranged on the inner side of the valve seat, the limiting block and the limiting groove are matched with each other, and the sliding connection between the valve seat and the valve rod through the limiting block and the limiting groove forms a sliding structure.

[0013] Further, the outer side of the valve rod is wound with a torsion spring, the initial end of the torsion spring is connected with the valve rod, and the terminal end of the torsion spring is connected with the inner side of the valve seat.

[0014] Further, the both ends of the butterfly plate are provided with corrosion-resistant layers, and wear-resistant strips are arranged on the outer sides of the corrosion-resistant layers.

[0015] Further, the wear-resistant strips are arranged at equal intervals at the both ends of the butterfly plate, and the wear-resistant strips are symmetrical about the vertical central axis of the butterfly plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The second flange and the first flange are connected through bolts, the outer side of the joint of the second flange and the first flange is individually sealed and wrapped by the sealing pair on the inner side of the sealing cover plate, so that leakage is avoided, when the first flange and the second flange are connected by jointing, the gas in the inflatable sealing layer is transported to the inside of the elastic air bag through the hose, and the elastic sealing pair arranged on the inner side of the first flange and the second flange can press the elastic air bag, so that the elastic sealing pair and the elastic air bag fill the gap at the joint of the first flange and the second flange, thereby playing an automatic compensation role.

[0018] Further, the elastic air bag and the elastic sealing pair are both elastic, so that the elastic sealing pair and the elastic air bag are more closely attached when being extruded due to the elasticity, effectively achieving automatic compensation of the sealing pair in the case of sealing pair wear, and increasing the stability during use.

[0019] Further, the valve seat drives the torsion spring to deflect when rotating, and the limiting block is driven to rotate, and the limiting block slides in the limiting groove, and the limiting groove can limit the slidable angle of the limiting block, thereby achieving stroke limiting, and the limiting groove can avoid the problem of angle deviation of the limiting block caused by water impact when being opened to the maximum angle.

[0020] 2. The corrosion-resistant layer outside the butterfly plate can increase the corrosion resistance of the butterfly plate during use, avoiding the problem of surface corrosion of the butterfly plate caused by long-term contact with liquid.

[0021] Further, the wear-resistant strip outside the corrosion-resistant layer can increase the wear resistance of the butterfly plate during use, thereby prolonging the service life of the butterfly plate and increasing the applicability during use. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view structural schematic diagram of the utility model;

[0023] Figure 2 It is a side view sectional view structural schematic diagram of the utility model;

[0024] Figure 3 It is an explosion structural schematic diagram of the automatic compensation mechanism of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the stroke limiting mechanism and the wear-resistant mechanism of the utility model;

[0026] Figure 5 It is a top view sectional view structural schematic diagram of the stroke limiting mechanism of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the automatic compensation mechanism of the utility model;

[0028] In the figure: 1, valve seat; 2, butterfly valve body; 3, valve stem; 4, butterfly plate; 5, first flange; 6, second flange; 7, connecting pipe; 8, sealing cover plate; 9, elastic sealing pair; 10, elastic air bag; 11, hose; 12, inflatable sealing layer; 13, torsion spring; 14, limiting block; 15, limiting groove; 16, wear-resistant strip; 17, corrosion-resistant layer. DETAILED DESCRIPTION

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

[0030] Embodiment one: the technical solutions shown in the above Figure 1 , Figure 2 , Figure 3 and Figure 6 , in order to solve the problem that the connection of the butterfly valve is prone to leakage due to sealing wear, thereby reducing the applicability of the butterfly valve: the automatic compensation wear-resistant bidirectional butterfly valve discloses an automatic compensation mechanism, including a butterfly valve body 2, a valve seat 1 is installed at the top end of the butterfly valve body 2, and a valve stem 3 is rotatably connected inside the valve seat 1, a butterfly plate 4 is installed at the bottom end of the valve stem 3 extending into the butterfly valve body 2, and first flanges 5 are installed on the left and right sides of the butterfly valve body 2, second flanges 6 are installed on the side away from the butterfly valve body 2 of the first flanges 5 through bolts, a connecting pipe 7 is arranged on the right side of the second flanges 6, and a sealing cover plate 8 is installed on the left side of the second flanges 6, and an automatic compensation mechanism for enhancing sealing is arranged between the first flanges 5 and the second flanges 6, the automatic compensation mechanism includes an inflatable sealing layer 12, the inflatable sealing layer 12 is arranged on the outside of the connection between the first flanges 5 and the second flanges 6, the inside of the inflatable sealing layer 12 is connected with an elastic air bag 10 through a hose 11, elastic sealing pairs 9 are attached to the left and right sides of the elastic air bag 10, the elastic sealing pairs 9 are arranged on the opposite side of the first flanges 5 and the second flanges 6, the diameter of the elastic sealing pairs 9 is greater than the diameter of the elastic air bag 10, and the hose 11 is equally distributed on the outside of the elastic air bag 10.

[0031] In this example, the second flanges 6 and the first flanges 5 are connected through bolts, the sealing cover plate 8 on the outside of the second flanges 6 is sleeved on the outside of the first flanges 5, the outside of the second flanges 6 and the first flanges 5 is separately sealed and wrapped by the sealing pairs on the inside of the sealing cover plate 8, so as to avoid the leakage, and when the first flanges 5 and the second flanges 6 are connected by being attached, the inflatable sealing layer 12 between the first flanges 5 and the second flanges 6 is extruded, the gas in the inflatable sealing layer 12 is transported to the inside of the elastic air bag 10 through the hose 11, and the elastic sealing pairs 9 arranged on the inside of the first flanges 5 and the second flanges 6 can press the elastic air bag 10, so that the elastic sealing pairs 9 and the elastic air bag 10 fill the gap between the first flanges 5 and the second flanges 6, thereby playing the role of automatic compensation;

[0032] And the elastic air bag 10 and the elastic sealing pair 9 are both elastic, so that the elastic sealing pair 9 and the elastic air bag 10 are more closely attached when being extruded due to the elasticity, effectively achieving automatic compensation of the sealing pair in the case of sealing pair wear, and increasing the stability during use.

[0033] Embodiment two: as Figure 1 , Figure 2 , Figure 4 and Figure 5 The technical scheme is shown, in order to solve the problem of excessive rotation angle of the butterfly plate 4 when rotating to open or close: the automatic compensation wear-resistant bidirectional butterfly valve discloses a stroke limiting mechanism, the top end of the valve stem 3 penetrates and extends to the top end of the valve seat 1, and the lower end of the outer side of the valve seat 1 is provided with a stroke limiting mechanism for limiting the angle of the butterfly plate 4, the stroke limiting mechanism comprises a limiting groove 15, and the limiting groove 15 is opened on the inner side of the valve seat 1, the limiting block 14 and the limiting groove 15 are matched with each other, and the valve seat 1 and the valve stem 3 are connected by the sliding connection of the limiting block 14 and the limiting groove 15 to form a sliding structure, and the outer side of the valve stem 3 is wound with a torsional spring 13, the initial end of the torsional spring 13 is connected with the valve stem 3, and the terminal end of the torsional spring 13 is connected with the inner side of the valve seat 1.

[0034] In this example, the valve seat 1 rotates to drive the butterfly plate 4 to rotate and achieve the opening or closing of the butterfly valve body 2 connected to the pipeline, the valve seat 1 rotates to drive the torsional spring 13 to deflect, and the limiting block 14 is also driven to rotate, the limiting block 14 slides in the limiting groove 15, and the limiting groove 15 can limit the slidable angle of the limiting block 14, thereby achieving stroke limiting, and the limiting groove 15 can avoid the problem of angle deviation of the limiting block 14 due to water impact when the limiting block 14 is opened to the maximum angle.

[0035] Embodiment three: as Figure 1 , Figure 2 and Figure 4 The technical scheme is shown, in order to solve the problem of corrosion of the surface of the butterfly plate 4 after long-term use: the automatic compensation wear-resistant bidirectional butterfly valve discloses a wear-resistant mechanism, both ends of the butterfly plate 4 are provided with a corrosion-resistant layer 17, and the outer side of the corrosion-resistant layer 17 is installed with a wear-resistant strip 16, the wear-resistant strips 16 are arranged at equal intervals on both ends of the butterfly plate 4, and the wear-resistant strips 16 are symmetrical about the vertical central axis of the butterfly plate 4.

[0036] In this example, the corrosion-resistant layer 17 provided on the outer side of the butterfly plate 4 can increase the corrosion-resistant performance of the butterfly plate 4 during use, avoiding the problem of surface corrosion of the butterfly plate 4 due to long-term contact with liquid, and the wear-resistant strip 16 on the outer side of the corrosion-resistant layer 17 can increase the wear-resistant performance of the butterfly plate 4 during use, thereby prolonging the service life of the butterfly plate 4 and increasing the applicability during use.

[0037] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic compensation wear-resistant double-direction butterfly valve, comprising a butterfly valve body (2), a valve seat (1) is installed at the top end of the butterfly valve body (2), a valve rod (3) is rotatably connected inside the valve seat (1), a butterfly plate (4) is installed at the bottom end of the valve rod (3) extending into the butterfly valve body (2), first flanges (5) are installed on the left and right sides of the butterfly valve body (2), second flanges (6) are installed on the sides of the first flanges (5) away from the butterfly valve body (2) through bolts, and a connecting pipe (7) is arranged on the right side of the second flanges (6). characterized in that An automatic compensation mechanism for enhancing sealing is arranged between the first flanges (5) and the second flanges (6), the automatic compensation mechanism comprises an air-filled sealing layer (12), the air-filled sealing layer (12) is arranged on the outside of the connection between the first flanges (5) and the second flanges (6), and the inside of the air-filled sealing layer (12) is connected with an elastic air bag (10) through a hose (11). The top end of the valve rod (3) extends through and to the top end of the valve seat (1), and a stroke limiting mechanism for limiting the angle of the butterfly plate (4) is arranged at the lower end of the outside of the valve seat (1).

2. The self-compensating wear-resistant double-direction butterfly valve according to claim 1, characterized in that: Elastic sealing pairs (9) are attached to the left and right sides of the elastic air bag (10), and the elastic sealing pairs (9) are arranged on the opposite sides of the first flanges (5) and the second flanges (6).

3. The self-compensating wear-resistant butterfly valve according to claim 2, characterized in that: The diameter of the elastic sealing pairs (9) is greater than the diameter of the elastic air bag (10), and the hose (11) is distributed at equal angles on the outside of the elastic air bag (10).

4. The self-compensating wear-resistant butterfly valve according to claim 3, characterized in that: The stroke limiting mechanism comprises a limiting groove (15), the limiting groove (15) is arranged on the inside of the valve seat (1), a limiting block (14) and the limiting groove (15) are matched with each other, and the valve seat (1) and the valve rod (3) are connected through the sliding connection of the limiting block (14) and the limiting groove (15) to form a sliding structure.

5. The self-compensating wear-resistant butterfly valve according to claim 4, characterized in that: A torsional spring (13) is wound on the outside of the valve rod (3), the initial end of the torsional spring (13) is connected with the valve rod (3), and the terminal end of the torsional spring (13) is connected with the inside of the valve seat (1).

6. The self-compensating wear-resistant butterfly valve according to claim 1, characterized in that: Anti-corrosion layers (17) are arranged at both ends of the butterfly plate (4), and wear-resistant strips (16) are installed on the outside of the anti-corrosion layers (17).

7. The self-compensating wear-resistant butterfly valve according to claim 6, characterized in that: The wear-resistant strips (16) are arranged at equal intervals at both ends of the butterfly plate (4), and the wear-resistant strips (16) are symmetrical about the vertical central axis of the butterfly plate (4).

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