Double-shaft bidirectional hard sealing butterfly valve

Abstract

The double-shaft bidirectional hard sealing butterfly valve comprises a valve channel and a valve plate installed on the inner side of the valve channel, and installation flanges are fixedly connected to the outer sides of the two ends of the valve channel; the valve channel and the valve plate are provided with sealing pieces used for supporting and sealing the valve plate. The two sealing pieces are fixedly installed on the sealing air bags on the front side and the rear side of the valve plate. The inflating tube is communicated with the sealing air bag; and the connecting pipe is communicated with the air inlet end of the inflating pipe. When the valve plate is opened, the first spring telescopic rod can be stretched, the acting force of the first spring telescopic rod on the valve plate can reduce deformation generated when the valve plate is subjected to water flow impact force, and when the valve plate is closed, the first spring telescopic rod abuts against the valve plate, deformation generated when the valve plate is subjected to reverse water flow impact force can be reduced; and the sealing performance between the valve plate and the valve channel can be improved by filling the expanded sealing air bag, so that the two-way sealing performance of the valve plate during opening and closing is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a double-shaft and double-direction hard-sealed butterfly valve. Background Art

[0002] A butterfly valve, also called a flap valve, is a simple structure regulating valve. A butterfly valve used for the on-off control of a low-pressure pipeline medium refers to a valve in which the closing member (valve flap or butterfly plate) is a disc and rotates around the valve shaft to achieve opening and closing.

[0003] Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. They mainly play a role of cutting off and throttling in pipelines. The opening and closing member of a butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulating.

[0004] Butterfly valves mainly play a role of cutting off and throttling in pipelines. With the continuous construction of long-distance pipeline transportation projects, high-rise construction, and the renovation of water supply and drainage pipelines in our country, reverse water pressure is likely to be generated. In the actual use process, the sealing performance in the reverse state (against the liquid inlet direction) cannot be well guaranteed, thus affecting the actual use effect. Therefore, the present invention proposes a double-shaft and double-direction hard-sealed butterfly valve to solve the above problems. Summary of the Invention

[0005] To solve the above problems, the present invention provides a double-shaft and double-direction hard-sealed butterfly valve to solve this problem.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] A double-shaft and double-direction hard-sealed butterfly valve includes a valve passage and a valve plate installed inside the valve passage. Installation flanges are fixedly connected to the outer sides of both ends of the valve passage. Sealing members for supporting and sealing the valve plate are provided on the valve passage and the valve plate; the sealing members include sealing air bags fixedly installed on the front and rear sides of the valve plate. An air charging pipe is provided on the sealing air bag, and a connecting pipe is provided at the air inlet end of the air charging pipe. The sealing members further include two first support blocks fixedly connected to the inner wall of the valve passage; second support blocks fixedly connected to the front and rear sides of the valve plate; and first spring telescopic rods ball-jointed between the first support blocks and the second support blocks on the same side.

[0008] It is further provided that: Connecting members for supporting and sealing the connection of the valve passage are provided on the valve passage and the valve plate.

[0009] It is further provided that: The connecting members include two second spring telescopic rods, and the two second spring telescopic rods are respectively hinged to the front and rear sides of the valve plate; a sealing ring is hinged to the end of the second spring telescopic rod away from the valve plate; and a sealing ring is embedded on the sealing ring.

[0010] Further set as: both the first spring telescopic rod and the second spring telescopic rod are composed of a sleeve rod, a spring and a sliding rod, the sliding rod is slidably connected inside the sleeve rod, and the spring is fixedly connected between one end of the sliding rod located inside the sleeve rod and the inside of the sleeve rod.

[0011] Further set as: the sliding rod of the first spring telescopic rod is ball-jointed on the first support block, the sleeve rod on the first spring telescopic rod is ball-jointed on the second support block, the sleeve rod of the second spring telescopic rod is hinged on the valve plate, and the sliding rod of the second spring telescopic rod is hinged on the sealing ring.

[0012] Further set as: the first spring telescopic rods are distributed in an inclined shape, and the two first spring telescopic rods are symmetrically distributed in a staggered manner on the front and rear sides of the valve plate.

[0013] Further set as: the end of the inflation pipe located inside the valve passage is a flexible pipe, and the ends of the two inflation pipes located outside the valve passage are communicated with the connecting pipe through a three-way valve.

[0014] 8. The double-axis bidirectional hard-sealed butterfly valve according to the claim, wherein a connecting groove is formed in the inner wall of the valve passage, the sealing ring is slidably connected in the connecting groove, and the inner diameter of the connecting groove is adapted to the outer diameter of the sealing ring.

[0015] Further set as: the number of sealing rings on each sealing ring is two, and every two sealing rings are symmetrically distributed on one sealing ring.

[0016] Further set as: the second spring telescopic rods are distributed obliquely above the eccentric position of the valve plate, and the two second spring telescopic rods are symmetrically distributed in a staggered manner on the front and rear sides of the valve plate.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] 1. When the valve plate is opened, the present invention can stretch the first spring telescopic rod, and the force of the first spring telescopic rod on the valve plate can reduce the deformation of the valve plate caused by the impact force of the water flow. When the valve plate is closed, the resistance of the first spring telescopic rod to the valve plate can reduce the deformation of the valve plate caused by the reverse water flow impact force, and the inflated sealing airbag can improve the tightness between the valve plate and the valve passage, thereby improving the bidirectional sealing performance of the valve plate when it is opened and closed.

[0019] 2. When the valve plate is opened, the present invention can push the sealing ring to the connection between the valve passage and the pipe fitting through the second spring telescopic rod for contact sealing, so as to improve the bidirectional sealing performance of the connection between the entire butterfly valve and the pipe fitting. Description of the Drawings

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Is the three-dimensional view of the overall structure of the present invention;

[0022] Figure 2 Is the rear view of the overall structure of the present invention;

[0023] Figure 3 Is the schematic diagram of the valve passage and seal structure of the present invention;

[0024] Figure 4 Is the side view of the valve passage and seal structure of the present invention;

[0025] Figure 5 Is the schematic diagram of the connecting piece structure of the present invention.

[0026] Reference numerals: 1, valve passage; 2, valve plate; 3, seal; 31, seal airbag; 32, inflation pipe; 33, connecting pipe; 34, first support block; 35, second support block; 36, first spring telescopic rod; 37, connecting groove; 4, connecting piece; 41, second spring telescopic rod; 42, sealing ring; 43, sealing ring; 5, mounting flange. Specific embodiments

[0027] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment

[0031] Refer to Figures 1 - 5 , a double-axis two-way hard-sealed butterfly valve disclosed in the present invention, includes a valve passage 1 and a valve plate 2 installed inside the valve passage 1. Installation flanges 5 are fixedly connected to the outer sides of both ends of the valve passage 1. Among them, sealing members 3 for supporting and sealing the valve plate 2 are provided on the valve passage 1 and the valve plate 2; connecting members 4 for supporting and sealing the connection of the valve passage 1 are provided on the valve passage 1.

[0032] The present invention improves the sealing performance of the valve plate 2 during forward liquid inlet and reverse liquid inlet through the sealing members 3 and the connecting members 4 on the valve passage 1 and the valve plate 2.

[0033] Specifically, the sealing member 3 includes sealing air bags 31 fixedly installed on the front and rear sides of the valve plate 2; an air charging pipe 32 communicating with the sealing air bags 31; a connecting pipe 33 communicating with the air inlet end of the air charging pipe 32. After communicating with an air charging device through the connecting pipe 33, a sealing medium is conveyed into the sealing air bags 31 for the sealing air bags 31 to expand and support.

[0034] The sealing member 3 further includes two first support blocks 34 fixedly connected to the inner wall of the valve passage 1; second support blocks 35 fixedly connected to the front and rear sides of the valve plate 2; a first spring telescopic rod 36 ball-jointed between the first support block 34 and the second support block 35 on the same side. The first spring telescopic rod 36 is used to pull and support the opened valve plate 2.

[0035] When the valve plate 2 is opened, the first spring telescopic rod 36 can be stretched. The acting force of the first spring telescopic rod 36 on the valve plate 2 can reduce the deformation of the valve plate 2 caused by the impact force of the water flow. When the valve plate 2 is closed, the resistance of the first spring telescopic rod 36 to the valve plate 2 can reduce the deformation of the valve plate 2 caused by the reverse impact force of the water flow, and the expanded and filled sealing air bags 31 can improve the tightness between the valve plate 2 and the valve passage 1, thereby improving the two-way sealing performance of the valve plate 2 during opening and closing.

[0036] In this embodiment, the first spring telescopic rods 36 are distributed obliquely, and the two first spring telescopic rods 36 are distributed symmetrically and staggeredly on the front and rear sides of the valve plate 2, so that while the two first spring telescopic rods 36 can support and pull the valve plate 2, they do not affect the opening and closing of the valve plate 2.

[0037] Further, one end of the charging pipe 32 located inside the valve passage 1 is a flexible hose, so that when the valve plate 2 is opened, the end of the charging pipe 32 located inside the valve passage 1 can be stretched to avoid affecting the opening and closing of the valve plate 2. The two ends of the charging pipes 32 located outside the valve passage 1 are communicated with the connecting pipe 33 through a three-way valve; and the connecting pipe 33 is communicated with a conventional air pump, so that the started air pump fills the sealing airbag 31 with gas through the connecting pipe 33 and the charging pipes 32. The air pump is installed in a conventional installation manner, and can be installed at the valve passage 1 or the pipeline, which is convenient for the operator to turn on or off the air pump when operating the butterfly valve.

[0038] When the valve plate 2 is opened, the second spring telescopic rod 41 can push the sealing ring 42 to the connection between the valve passage 1 and the pipe fitting for abutting and sealing, so as to improve the bidirectional sealing performance at the connection between the entire butterfly valve and the pipe fitting.

[0039] In this embodiment, the connecting member 4 includes two second spring telescopic rods 41, and the two second spring telescopic rods 41 are respectively hinged on the front and rear sides of the valve plate 2; the sealing ring 42 hinged to the end of the second spring telescopic rod 41 away from the valve plate 2; the sealing ring 43 embedded in the sealing ring 42. The closed valve plate 2 pushes the sealing ring 42 through the second spring telescopic rod 41 to abut against the connection of the valve passage 1.

[0040] Wherein, both the first spring telescopic rod 36 and the second spring telescopic rod 41 are composed of a sleeve rod, a spring and a sliding rod. The sliding rod is slidably connected in the sleeve rod, and the spring is fixedly connected between the end of the sliding rod located inside the sleeve rod and the inner side of the sleeve rod. A conventional sealing ring that abuts against the sliding rod is embedded in the inner side of the sleeve rod to improve the sealing performance of the sliding rod sliding in the sleeve rod;

[0041] The sliding rod of the first spring telescopic rod 36 is ball-jointed on the first support block 34, the sleeve rod on the first spring telescopic rod 36 is ball-jointed on the second support block 35, the sleeve rod of the second spring telescopic rod 41 is hinged on the valve plate 2, and the sliding rod of the second spring telescopic rod 41 is hinged on the sealing ring 42; and the number of the sealing rings 43 on each sealing ring 42 is two, and the two sealing rings 43 are symmetrically distributed on one sealing ring 42, so that when the two sealing rings 43 on each sealing ring 42 slide to the connection between the mounting flange 5 and the pipeline, the connection can be placed between the two sealing rings 43 to improve the sealing performance at the connection between the mounting flange 5 and the pipeline.

[0042] In addition, the second spring telescopic rod 41 is distributed obliquely above the eccentric position of the valve plate 2, and the two second spring telescopic rods 41 are distributed symmetrically and staggeredly on the front and rear sides of the valve plate 2, so that while the second spring telescopic rod 41 supports and connects the sealing ring 42, it does not affect the normal opening and closing of the valve plate 2; a connecting groove 37 is formed in the inner wall of the valve passage 1, the sealing ring 42 is slidably connected to the connecting groove 37, and the inner diameter of the connecting groove 37 is adapted to the outer diameter of the sealing ring 42, so that the sealing ring 42 can slide stably in the connecting groove 37 when being pushed or pulled by the second spring telescopic rod 41.

[0043] The working principle and beneficial effects of the present invention are as follows:

[0044] Since the two first spring telescopic rods 36 are distributed obliquely and staggeredly on the front and rear sides of the valve plate 2 and are respectively ball-jointed to the valve passage 1 and the valve plate 2 at both ends, when the valve plate 2 is opened, the first spring telescopic rod 36 can be stretched. After the first spring telescopic rod 36 is stretched, the generated elastic force can generate a reverse pulling force on the valve plate 2, which can reduce the deformation of the valve plate 2 caused by the water flow impact force. When the valve plate 2 is closed, the reset first spring telescopic rod 36 supports and abuts against the valve plate 2, which can reduce the deformation of the valve plate 2 caused by the reverse water flow impact force. And the inflation of the sealing airbag 31 through the connecting pipe 33 and the inflating pipe 32 makes it closely abut against the inner wall of the valve passage 1 to increase the clearance between the valve plate 2 and the valve passage 1, so as to improve the tightness between the valve plate 2 and the valve passage 1, thereby improving the bidirectional sealing performance of the valve plate 2 when it is opened and closed.

[0045] After the pipeline is connected to the valve passage 1 through the installation flange 5, at this time, the sealing ring 42 is placed in the connecting groove 37. Therefore, when the valve plate 2 rotates and opens, the second spring telescopic rod 41 can push the sealing ring 42 to the connection between the valve passage 1 and the pipe fitting for abutting and sealing, so as to improve the bidirectional sealing at the connection between the whole butterfly valve and the pipe fitting.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-axis bidirectional hard-sealed butterfly valve, comprising a valve channel (1) and a valve plate (2) mounted on the inner side of the valve channel (1), wherein the outer sides of both ends of the valve channel (1) are fixedly connected with mounting flanges (5), characterized in that: The valve channel (1) and the valve plate (2) are provided with a sealing member (3) for supporting and sealing the valve plate (2); the sealing member (3) comprises a sealing airbag (31) fixedly mounted on the front and rear sides of the valve plate (2); the sealing airbag (31) is provided with an inflation tube (32); the inflation tube (32) is provided with a connecting tube (33) at its air inlet end; the sealing member (3) further comprises two first supporting blocks (34) fixedly connected to the inner wall of the valve channel (1); a second supporting block (35) fixedly connected to the front and rear sides of the valve plate (2); and a first spring telescopic rod (36) ball-connected between the first supporting block (34) and the second supporting block (35) on the same side.

2. The double-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: The valve channel (1) and the valve plate (2) are provided with a connecting piece (4) for supporting the connection of the sealing valve channel (1).

3. The double-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: The connecting member (4) includes two second spring telescopic rods (41), and the two second spring telescopic rods (41) are respectively hinged on the front and rear sides of the valve plate (2); a sealing ring (42) is hinged on one end of the second spring telescopic rod (41) away from the valve plate (2); and a sealing ring (43) is embedded on the sealing ring (42).

4. The double-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: The first spring telescopic rod (36) and the second spring telescopic rod (41) are both composed of a sleeve rod, a spring and a slide rod. The slide rod is slidably connected inside the sleeve rod, and the spring is fixedly connected between one end of the slide rod located inside the sleeve rod and the inside of the sleeve rod.

5. The double-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: The sliding rod ball of the first spring telescopic rod (36) is connected to the first support block (34), the sleeve rod ball on the first spring telescopic rod (36) is connected to the second support block (35), the sleeve rod of the second spring telescopic rod (41) is hinged on the valve plate (2), and the sliding rod on the second spring telescopic rod (41) is hinged on the sealing ring (42).

6. The double-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: The first spring telescopic rods (36) are distributed in an inclined shape, and the two first spring telescopic rods (36) are symmetrically distributed on the front and rear sides of the valve plate (2) in a staggered manner.

7. The dual-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: One end of the inflation tube (32) located inside the valve channel (1) is a hose, and one end of the two inflation tubes (32) located outside the valve channel (1) is connected to the connecting tube (33) via a three-way valve.

8. The dual-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: The inner wall of the valve channel (1) is provided with a connecting groove (37), the sealing ring (42) is slidably connected to the connecting groove (37), and the inner diameter of the connecting groove (37) is matched with the outer diameter of the sealing ring (42).

9. The double-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: The number of sealing rings (43) on each sealing ring (42) is two, and every two sealing rings (43) are symmetrically distributed on one sealing ring (42).

10. The dual-axis bidirectional hard-sealed butterfly valve according to claim 1, characterized in that: The second spring telescopic rod (41) is distributed obliquely above the eccentric portion of the valve plate (2), and the two second spring telescopic rods (41) are staggered and symmetrically distributed on the front and rear sides of the valve plate (2).

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