Liquid-operated butterfly valve with high sealing performance

Abstract

This utility model relates to the field of hydraulic butterfly valve technology and discloses a hydraulic butterfly valve with strong sealing performance. It includes a butterfly valve body, with a valve core installed inside the bottom end of the butterfly valve body. Two mounting rings are symmetrically fixedly connected to the bottom side wall of the butterfly valve body on both sides of the valve core. Each mounting ring has an auxiliary sealing mechanism on its outer wall. The auxiliary sealing mechanism is used to seal the gap at the connection point when the butterfly valve body is combined with a flange. The auxiliary sealing mechanism includes grooves evenly formed in a ring shape on the inner side wall of the mounting ring near the butterfly valve body. Support blocks are slidably connected inside each of the grooves, and lifting plates are fixedly connected to the top side walls of each of the support blocks. In this utility model, the sealing ring in the lifted state undergoes longitudinal deformation compared to the initial state, thereby achieving the purpose of sealing the gap at the connection point between the flange and the butterfly valve body, improving the sealing effect during use after the butterfly valve body and flange are combined.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic butterfly valve technology, specifically to a hydraulic butterfly valve with strong sealing performance. Background Technology

[0002] Hydraulic butterfly valves are operated using hydraulic oil and are a new generation of hydraulic butterfly valves. They have both shut-off and check functions, and can replace two valves with one valve. They can achieve valve closure in two stages, fast closing and slow closing, according to a pre-set program. They can eliminate and suppress water hammer hazards caused by pressure rise during sudden power outages or pump stoppages due to accidents, as well as pump unit reversal caused by medium backflow. They are effective equipment to ensure the safe and reliable operation of pump units and pipeline systems.

[0003] Hydraulic butterfly valves are suitable for pump outlet pipelines where the medium is water, and they usually need to be installed with flanges. Due to reasons such as gasket aging, scratches or corrosion on the flange sealing surface, insufficient or uneven bolt preload, the seal at the connection between the flange and the hydraulic butterfly valve will fail, causing the medium to leak out from the connection and resulting in serious adverse consequences. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic butterfly valve with strong sealing performance to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a hydraulic butterfly valve with strong sealing performance, including a butterfly valve body. A valve core is installed inside the bottom end of the butterfly valve body. Two mounting rings are symmetrically fixedly connected to the bottom side wall of the butterfly valve body and on both sides of the valve core. An auxiliary sealing mechanism is provided on the outer wall of each of the two mounting rings. The auxiliary sealing mechanism is used to seal the gap at the connection when the butterfly valve body is combined with the flange.

[0006] As a further improvement to this technical solution, the auxiliary sealing mechanism includes sliding grooves evenly opened in a ring orientation on the inner side wall of the mounting ring near the butterfly valve body. Support blocks are slidably connected inside the multiple sliding grooves. Lifting plates are fixedly connected to the top side walls of the multiple support blocks. A sealing ring is sleeved on the outer wall of the mounting ring. The inner side wall of the sealing ring is fixedly connected to the multiple lifting plates. Several support seats are evenly fixedly connected to the side wall of the mounting ring and on one side of the sliding groove. The number of support seats is the same as the number of support blocks. Pressure rods are hinged inside the multiple support seats.

[0007] The sealing ring is lifted by the lifting plate. After the butterfly valve body is connected to the flange, the sealing ring in the lifted state will undergo longitudinal deformation compared with the sealing ring in the initial state, thereby achieving the purpose of sealing the gap at the connection between the flange and the butterfly valve body.

[0008] As a further improvement to this technical solution, the outline shape of the pressure rod is L-shaped, and a torsion spring is sleeved inside the hinge joint between the pressure rod and the support seat. The end of the pressure rod near the support seat is located below the bottom of the lifting plate. Elastic elements are fixedly connected to the bottom of the multiple support blocks, and the bottom of the elastic elements is fixedly connected to the inner wall of the bottom of the slide groove.

[0009] When the pressure rod fails to lift the lifting plate, the elastic element rebounds, causing the support block to reset inside the groove, making it easy to use next time.

[0010] As a further improvement to this technical solution, pressure plates are fixedly connected to the outer walls of the top of the multiple pressure rods, and several anti-slip grooves are opened on the outer walls of the multiple pressure plates on one side of the sealing ring. The multiple pressure rods and pressure plates are located between the sealing ring and the butterfly valve body, and the outline of the multiple pressure plates is rectangular.

[0011] By setting a rectangular profile pressure plate, the contact area between the top of the pressure rod and the flange interface can be increased. At the same time, the anti-slip texture increases the friction between the flange and the pressure plate, allowing the flange and the butterfly valve body to be smoothly connected.

[0012] As a further improvement to this technical solution, a sealing ring is fixedly connected to the inner wall of the end of the mounting ring away from the butterfly valve body.

[0013] After the flange is combined with the butterfly valve body, it can work with the sealing ring to provide a secondary seal at the connection between the flange and the butterfly valve body.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In this highly sealing hydraulic butterfly valve, an auxiliary sealing mechanism is installed. The bottom end of the pressure rod raises the lifting plate, allowing it to slide towards the edge of the mounting ring inside the groove via the support block. The lifting plate lifts the sealing ring, and after the butterfly valve body is joined to the flange, the sealing ring in the lifted state will undergo longitudinal deformation compared to the initial state. This achieves the purpose of sealing the gap at the connection between the flange and the butterfly valve body, improving the sealing effect during use after the butterfly valve body and flange are joined, and preventing the medium from leaking out from the connection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial sectional view of the three-dimensional structure of the auxiliary sealing mechanism components of the utility model.

[0018] Figure 3 This is a partial three-dimensional structural diagram of the mounting ring of the utility model;

[0019] Figure 4 This is a three-dimensional side view of the mounting ring of the utility model.

[0020] The meanings of the labels in the diagram are as follows:

[0021] 1. Butterfly valve body; 2. Valve core; 3. Mounting ring; 4. Auxiliary sealing mechanism; 41. Slide groove; 42. Support block; 43. Lifting plate; 44. Sealing ring; 45. Support seat; 46. Pressure rod; 51. Elastic element; 61. Pressure plate; 71. Sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Example 1

[0025] Please see Figures 1-4 As shown, this embodiment provides a hydraulic butterfly valve with strong sealing performance, including a butterfly valve body 1. A valve core 2 is installed inside the bottom end of the butterfly valve body 1. Two mounting rings 3 are symmetrically fixedly connected to the bottom side wall of the butterfly valve body 1 and on both sides of the valve core 2. An auxiliary sealing mechanism 4 is provided on the outer wall of both mounting rings 3. The auxiliary sealing mechanism 4 is used to seal the gap at the connection when the butterfly valve body 1 is combined with the flange.

[0026] The auxiliary sealing mechanism 4 includes grooves 41 evenly spaced in a ring on the inner wall of the mounting ring 3 near the butterfly valve body 1. Support blocks 42 are slidably connected inside each groove 41. Lifting plates 43 are fixedly connected to the top sidewalls of each support block 42. A sealing ring 44 is fitted onto the outer wall of the mounting ring 3. The inner wall of the sealing ring 44 is fixedly connected to the lifting plates 43. Several support seats 45 are evenly fixedly connected to the sidewall of the mounting ring 3, located on one side of the grooves 41. The number of support seats 45 is the same as the number of support blocks 42. Each support seat 45 has a pressure rod 46 hinged inside. Before use, the butterfly valve body 1 needs to be combined with a flange. First, align the flange with the bottom end of the butterfly valve body 1 for installation, ensuring the flange end... The flange is precisely fitted onto the outside of the mounting ring 3. By continuously pushing, the side wall of the flange port is squeezed against the pressure rod 46, causing the pressure rod 46 to rotate in conjunction with the support seat 45. This allows the bottom end of the pressure rod 46 to lift the lifting plate 43, which then slides along the inside of the slide groove 41 via the support block 42 towards the edge of the mounting ring 3. The lifting plate 43 lifts the sealing ring 44. After the butterfly valve body 1 is joined to the flange, the sealing ring 44 in the lifted state will undergo longitudinal deformation compared to the initial state, thereby sealing the gap at the connection between the flange and the butterfly valve body 1. This improves the sealing effect during use after the butterfly valve body 1 is joined to the flange, preventing the medium from leaking out from the connection.

[0027] The pressure rod 46 has an L-shaped profile. A torsion spring is fitted inside the hinge joint between the pressure rod 46 and the support base 45. The end of the pressure rod 46 near the support base 45 is located below the bottom of the lifting plate 43. When the L-shaped pressure rod 46 is pushed, it rotates in conjunction with the support base 45, simultaneously compressing the torsion spring. This causes the bottom end of the pressure rod 46 to lift the lifting plate 43 and the sealing ring 44, raising them to a certain height. This ensures that after the flange and the butterfly valve body 1 are joined, the sealing ring 44, after being raised to a certain height, can seal the gap at the connection between the flange and the butterfly valve body 1. The bottom of each of the multiple support blocks 42 is fixedly connected to an elastic element 51. The bottom of the elastic element 51 is fixedly connected to the inner wall of the bottom of the slide groove 41. When the lifting plate 43 slides with the support block 42 inside the slide groove 41 toward the edge of the mounting ring 3, the support block 42 will pull the elastic element 51 synchronously. The elastic element 51 is composed of a spring, a limiting element and a shell. Therefore, when the pressure rod 46 does not lift the lifting plate 43, the support block 42 is reset inside the slide groove 41 under the action of spring rebound, which is convenient for the next use.

[0028] Multiple pressure rods 46 are fixedly connected to pressure plates 61 on their top outer walls. Multiple pressure plates 61 are located on the outer wall of one side of the sealing ring 44 and have several anti-slip grooves. Multiple pressure rods 46 and pressure plates 61 are located between the sealing ring 44 and the butterfly valve body 1. The outline of multiple pressure plates 61 is rectangular. By setting the rectangular outline of the pressure plates 61, the contact area between the top of the pressure rod 46 and the flange interface end can be increased. At the same time, the anti-slip grooves can be used to increase the friction between the flange and the pressure plates 61, so that the flange and the butterfly valve body 1 can be smoothly connected. The inner wall of the end of the mounting ring 3 away from the butterfly valve body 1 is fixedly connected to a sealing ring 71. By setting the sealing ring 71, after the flange and the butterfly valve body 1 are connected, it can work with the sealing ring 44 to provide a secondary seal at the connection between the flange and the butterfly valve body 1.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic butterfly valve with strong sealing performance, comprising a butterfly valve body (1), wherein a valve core (2) is installed inside the bottom end of the butterfly valve body (1), characterized in that: Two mounting rings (3) are symmetrically fixedly connected to the bottom side wall of the butterfly valve body (1) and on both sides of the valve core (2). The outer walls of the two mounting rings (3) are provided with auxiliary sealing mechanisms (4). The auxiliary sealing mechanisms (4) are used to seal the gap at the connection when the butterfly valve body (1) is combined with the flange.

2. The hydraulic butterfly valve with strong sealing performance according to claim 1, characterized in that: The auxiliary sealing mechanism (4) includes a sliding groove (41) evenly opened in a ring orientation on the inner side wall of the mounting ring (3) near the butterfly valve body (1). Support blocks (42) are slidably connected inside the multiple sliding grooves (41). Lifting plates (43) are fixedly connected to the top side walls of the multiple support blocks (42). A sealing ring (44) is sleeved on the outer wall of the mounting ring (3). The inner side wall of the sealing ring (44) is fixedly connected to the multiple lifting plates (43). A number of support seats (45) are evenly fixedly connected to the side wall of the mounting ring (3) and on one side of the sliding groove (41). The number of support seats (45) is the same as that of the support blocks (42). A pressure rod (46) is hinged inside the multiple support seats (45).

3. The hydraulic butterfly valve with strong sealing performance according to claim 2, characterized in that: The profile of the pressure rod (46) is L-shaped. A torsion spring is fitted inside the hinge joint between the pressure rod (46) and the support base (45). The end of the pressure rod (46) near the support base (45) is located below the bottom of the lifting plate (43).

4. The hydraulic butterfly valve with strong sealing performance according to claim 2, characterized in that: Each of the support blocks (42) has an elastic element (51) fixedly connected to its bottom, and the bottom of the elastic element (51) is fixedly connected to the inner wall of the bottom of the groove (41).

5. The hydraulic butterfly valve with strong sealing performance according to claim 2, characterized in that: Each of the pressure rods (46) has a pressure plate (61) fixedly connected to its top outer wall, and each of the pressure plates (61) has several anti-slip grooves on its outer wall on one side of the sealing ring (44).

6. The hydraulic butterfly valve with strong sealing performance according to claim 5, characterized in that: The multiple pressure rods (46) and pressure plates (61) are located between the sealing ring (44) and the butterfly valve body (1), and the multiple pressure plates (61) have a rectangular outline.

7. The hydraulic butterfly valve with strong sealing performance according to claim 1, characterized in that: A sealing ring (71) is fixedly connected to the inner wall of the end of the mounting ring (3) away from the butterfly valve body (1).

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