High temperature resistant sealing butterfly valve based on valve seat adjustment

Abstract

The utility model relates to butterfly valve technical field, concretely is a kind of high-temperature-resistant sealing butterfly valve based on valve seat adjustment, including valve body, valve seat body, electric actuator, valve plate, two flanges and sealing device, two flanges are installed at the both ends of valve body, valve seat body is installed on valve body, valve plate is rotatably connected with the inner wall of valve body, electric actuator is installed on valve seat body, for driving valve plate rotation;Sealing device is set on valve plate, sealing device includes the air cavity and two air inlet holes set on valve plate, the utility model, by setting sealing device, when valve plate is in sealed state, control assembly can deliver gas in air cavity to slide cavity and hollow sleeve, and push piston rod drives sealing plate to move, make sealing plate and conical auxiliary mouth tightly adhere, form additional sealing, double sealing structure effectively makes up the deficiency of single sealing mode, blocks medium leakage by the synergistic effect of two seals, greatly improves sealing reliability.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a high-temperature resistant sealing butterfly valve based on valve seat adjustment. Background Technology

[0002] A butterfly valve is a type of valve that controls the flow of media by rotating a disc-shaped plate around the valve stem. It is widely used in water supply and drainage, chemical, and metallurgical industries. Its working principle is as follows: the disc rotates within the valve body. When the disc is parallel to the direction of media flow, it is fully open; when perpendicular, it is fully closed. The flow rate can be controlled by adjusting the rotation angle. Control is primarily achieved through a drive mechanism mounted on the valve seat, such as a motor with a reducer, which controls the rotation of the valve stem and the disc, thus regulating the disc's movement.

[0003] In daily work, it has been found that existing butterfly valves are made of high-temperature resistant materials, such as high-temperature alloys or ceramic composite materials. However, when butterfly valves are sealing, their sealing function relies solely on the single contact structure between the butterfly plate and the valve seat. That is, the seal is formed by the tight contact between the butterfly plate and the valve seat when the butterfly plate is rotated to the closed position. During the opening and closing process of the butterfly plate, the sealing surface is worn. After long-term use, the flatness of the single sealing surface is destroyed, resulting in poor sealing effect and easy leakage. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the sealing function in the prior art relies solely on the single bonding structure between the butterfly plate and the valve seat, i.e., the seal is formed by the tight contact between the butterfly plate and the valve seat when the butterfly plate is rotated to the closed position. However, the sealing surface is worn during the opening and closing of the butterfly plate, and the flatness of the single sealing surface is destroyed after long-term use. Therefore, this invention proposes a high-temperature resistant sealing butterfly valve based on valve seat adjustment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-temperature resistant sealing butterfly valve based on valve seat adjustment, comprising a valve body, a valve seat body, an electric actuator, a valve plate, two flanges and a sealing device, wherein the two flanges are installed at both ends of the valve body, the valve seat body is installed on the valve body, the valve plate is rotatably connected to the inner wall of the valve body, and the electric actuator is installed on the valve seat body for driving the valve plate to rotate; The sealing device is mounted on a valve plate and includes an air chamber and two air inlets on the valve plate. The two air inlets are connected to the inner wall of the air chamber. Two hollow sleeves are fixedly connected to the surface of the valve plate, and piston rods are slidably connected to the inner wall of the hollow sleeves. Two sliding cavities are formed on the surface of the valve plate, and the sliding cavities are respectively connected to the air inlets and the hollow sleeves. A sealing plate is fixedly connected to one end of the two piston rods. An auxiliary port is fixedly connected to the inner wall of the valve body inlet. A control component is provided on the valve plate to push the gas in the air chamber to control the movement of the piston rod, so that the sealing plate fits with the auxiliary port. Through the above components, when the valve plate is sealed, the control component can deliver the gas in the air chamber to the hollow sleeves through the air inlets, push the piston rod to move, and make the sealing plate fit with the auxiliary port, achieving a double sealing effect.

[0006] Preferably, the control component includes an electric push rod installed below the valve plate, a piston head slidably connected to the inner wall of the air chamber, and the output end of the electric push rod fixedly connected to the surface of the piston head. Through the above components, when control is performed, the electric push rod is opened, and the electric push rod drives the piston head to move in the air chamber, so as to transport the gas in the air chamber to the hollow sleeve through the air inlet, thereby realizing the control operation.

[0007] Preferably, a spring is sleeved on the surface of the piston rod, and the two ends of the spring are fixedly connected to the piston rod and the inner wall of the hollow sleeve, respectively. Through the above-mentioned components, the spring can control the piston rod to reset, ensuring the stability of the piston rod after reset.

[0008] Preferably, the auxiliary port is tapered, and the inlet diameter of the auxiliary port is larger than the outlet diameter.

[0009] Preferably, the diameter of the sealing plate is smaller than the diameter of the valve plate, and the diameter of the sealing plate is larger than the diameter of the auxiliary port outlet.

[0010] Preferably, a high-temperature resistant gasket is fixedly connected to one side surface of the sealing plate. The high-temperature resistant gasket is made of perfluoroether rubber. Through the above-mentioned components, the high-temperature resistant gasket made of perfluoroether rubber fixedly connected to the sealing plate can improve the fit with the auxiliary port and improve the sealing effect.

[0011] Preferably, the sealing plate, auxiliary port, and hollow sleeve are all made of high-temperature resistant material, and the piston rod and piston head are also made of high-temperature resistant material.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, by setting a sealing device, when the valve plate is in a sealed state, the control component can transport the gas in the gas chamber to the sliding cavity and the hollow sleeve, and push the piston rod to drive the sealing plate to move, so that the sealing plate is tightly fitted with the conical auxiliary port to form an additional seal. The double sealing structure effectively makes up for the shortcomings of the single sealing method. Through the synergistic effect of the two seals, the leakage of the medium is blocked, and the sealing reliability is greatly improved.

[0013] 2. In this utility model, the core components of the sealing device (such as the sealing plate, auxiliary port, hollow sleeve, piston rod, and piston head) are all made of high-temperature alloys or ceramic composite materials and other high-temperature resistant materials. Combined with high-temperature resistant gaskets made of perfluoroether rubber, they can maintain structural stability and sealing performance in high-temperature environments. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a high-temperature resistant sealing butterfly valve based on valve seat adjustment is provided for this utility model. Figure 2 This utility model presents a cross-sectional structural schematic diagram of a high-temperature resistant sealing butterfly valve based on valve seat adjustment. Figure 3 A side view of the structure of a high-temperature resistant sealing butterfly valve based on valve seat adjustment is provided for this utility model. Figure 4 This utility model provides a cross-sectional view of the valve plate structure of a high-temperature resistant sealing butterfly valve based on valve seat adjustment. Figure 5 This invention presents an exploded structural diagram of the sealing device of a high-temperature resistant sealing butterfly valve based on valve seat adjustment.

[0015] Legend: 1. Valve body; 2. Valve seat body; 3. Electric actuator; 4. Valve plate; 5. Flange; 6. Sealing device; 61. Sealing plate; 62. High temperature resistant gasket; 63. Hollow sleeve; 64. Slide cavity; 65. Air inlet; 66. Piston rod; 67. Spring; 68. Auxiliary port; 69. Electric push rod; 610. Piston head; 611. Air chamber. Detailed Implementation

[0016] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a high-temperature resistant sealing butterfly valve based on valve seat adjustment, including a valve body 1, a valve seat body 2, an electric actuator 3, a valve plate 4, two flanges 5 and a sealing device 6. The two flanges 5 are installed at both ends of the valve body 1, the valve seat body 2 is installed on the valve body 1, the valve plate 4 is rotatably connected to the inner wall of the valve body 1, and the electric actuator 3 is installed on the valve seat body 2 to drive the valve plate 4 to rotate. The electric actuator 3 is an existing motor plus a reducer.

[0017] Specifically, the sealing device 6 is installed on the valve plate 4. The sealing device 6 includes an air chamber 611 and two air inlets 65 opened on the valve plate 4. The two air inlets 65 are connected to the inner wall of the air chamber 611. Two hollow sleeves 63 are fixedly connected to the surface of the valve plate 4. A piston rod 66 is slidably connected to the inner wall of the hollow sleeve 63. Two sliding cavities 64 are opened on the surface of the valve plate 4. The sliding cavities 64 are connected to the air inlets 65 and the hollow sleeves 63 respectively. A sealing plate 61 is fixedly connected to one end of the two piston rods 66. An auxiliary port 68 is fixedly connected to the inner wall of the inlet port of the valve body 1. A control component is provided on the valve plate 4. The auxiliary port 68 is tapered. The inlet diameter of the auxiliary port 68 is larger than the outlet diameter. The diameter of the sealing plate 61 is smaller than the diameter of the valve plate 4, and the diameter of the sealing plate 61 is larger than the outlet diameter of the auxiliary port 68. It is used to push the gas in the air chamber 611 to control the piston rod 66 to move, so that the sealing plate 61 fits with the auxiliary port 68.

[0018] In this implementation scheme: when the valve plate 4 is sealed, the control component can deliver the gas in the air chamber 611 to the hollow sleeve 63 through the air inlet 65, push the piston rod 66 to move, and make the sealing plate 61 fit with the auxiliary port 68 to achieve a double sealing effect.

[0019] Specifically, the control components include an electric push rod 69 installed below the valve plate 4, a piston head 610 slidably connected to the inner wall of the air chamber 611, and the output end of the electric push rod 69 fixedly connected to the surface of the piston head 610.

[0020] In this implementation scheme: When controlling, the electric push rod 69 is opened, and the electric push rod 69 drives the piston head 610 to move in the air chamber 611, so that the gas in the air chamber 611 is delivered to the hollow sleeve 63 through the air inlet 65 to realize the control operation.

[0021] Specifically, a spring 67 is fitted onto the surface of the piston rod 66. The two ends of the spring 67 are fixedly connected to the piston rod 66 and the inner wall of the hollow sleeve 63, respectively. The spring 67 can control the piston rod 66 to reset, ensuring the stability of the piston rod 66 after reset.

[0022] Specifically, a high-temperature resistant gasket 62 is fixedly connected to one side surface of the sealing plate 61. The high-temperature resistant gasket 62 is made of perfluoroether rubber.

[0023] In this embodiment, the high-temperature resistant gasket 62 made of perfluoroether rubber fixedly connected to the sealing plate 61 can improve the fit with the auxiliary port 68 and improve the sealing effect.

[0024] Specifically, the sealing plate 61, auxiliary port 68, and hollow sleeve 63 are all made of high-temperature resistant materials. The high-temperature resistant materials can be high-temperature alloys or ceramic composite materials, which are existing high-temperature resistant materials. The piston rod 66 and piston head 610 are also made of high-temperature resistant materials.

[0025] Working principle: When sealing is required, the electric actuator 3 first drives the valve plate 4 to rotate, so that the valve plate 4 is in a sealed state. Then, the electric push rod 69 drives the piston head 610 to move. The piston head 610 can compress the gas in the gas chamber 611 and deliver it to the slide chamber 64 and hollow sleeve 63 through the air inlet 65. The piston rod 66 moves in the slide chamber 64 and hollow sleeve 63. The spring 67 is stressed. After the piston rod 66 moves to a certain position, the sealing plate 61 and the high-temperature resistant gasket 62 are attached to the surface of the auxiliary port 68. Thus, the sealing plate 61 and the auxiliary port 68 form a second sealing line, improving the overall sealing effect. When it is necessary to open the valve plate 4, simply control the electric push rod 69 to reset. The gas is drawn back, and the spring force of the spring 67 drives the piston rod 66 and the sealing plate 61 to reset, removing the obstruction of the auxiliary port 68. The electric actuator 3 can then control the rotation of the valve plate 4 for adjustment.

Claims

1. A high-temperature resistant sealing butterfly valve based on valve seat adjustment, comprising a valve body (1), a valve seat body (2), an electric actuator (3), a valve plate (4), two flanges (5), and a sealing device (6), characterized in that: The two flanges (5) are installed at both ends of the valve body (1), the valve seat (2) is installed on the valve body (1), the valve plate (4) is rotatably connected to the inner wall of the valve body (1), and the electric actuator (3) is installed on the valve seat (2) to drive the valve plate (4) to rotate. The sealing device (6) is set on the valve plate (4). The sealing device (6) includes an air chamber (611) and two air inlets (65) opened on the valve plate (4). The two air inlets (65) are connected to the inner wall of the air chamber (611). Two hollow sleeves (63) are fixedly connected to the surface of the valve plate (4). A piston rod (66) is slidably connected to the inner wall of the hollow sleeve (63). Two sliding cavities (64) are opened on the surface of the valve plate (4). The sliding cavities (64) are respectively connected to the air inlets (65) and the hollow sleeves (63). A sealing plate (61) is fixedly connected to one end of the two piston rods (66). An auxiliary port (68) is fixedly connected to the inner wall of the inlet port of the valve body (1). A control component is provided on the valve plate (4) to push the gas in the air chamber (611) to move the control piston rod (66) so that the sealing plate (61) fits with the auxiliary port (68).

2. The high-temperature resistant sealing butterfly valve based on valve seat adjustment according to claim 1, characterized in that: The control assembly includes an electric push rod (69) mounted below the valve plate (4), a piston head (610) is slidably connected to the inner wall of the air chamber (611), and the output end of the electric push rod (69) is fixedly connected to the surface of the piston head (610).

3. The high-temperature resistant sealing butterfly valve based on valve seat adjustment according to claim 1, characterized in that: A spring (67) is fitted on the surface of the piston rod (66), and the two ends of the spring (67) are fixedly connected to the piston rod (66) and the inner wall of the hollow sleeve (63), respectively.

4. A high-temperature resistant sealing butterfly valve based on valve seat adjustment according to claim 1, characterized in that: The auxiliary port (68) is cone-shaped, and the inlet diameter of the auxiliary port (68) is larger than the outlet diameter.

5. A high-temperature resistant sealing butterfly valve based on valve seat adjustment according to claim 4, characterized in that: The diameter of the sealing plate (61) is smaller than that of the valve plate (4), and the diameter of the sealing plate (61) is larger than that of the outlet of the auxiliary port (68).

6. A high-temperature resistant sealing butterfly valve based on valve seat adjustment according to claim 1, characterized in that: A high-temperature resistant gasket (62) is fixedly connected to one side surface of the sealing plate (61), and the high-temperature resistant gasket (62) is perfluoroether rubber.

7. A high-temperature resistant sealing butterfly valve based on valve seat adjustment according to claim 1, characterized in that: The sealing plate (61), auxiliary port (68), and hollow sleeve (63) are all made of high-temperature resistant material.

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