Composite metal sealing type three-eccentric center butterfly valve

Abstract

The invention belongs to the technical field of butterfly valves, and discloses a composite metal sealing type three-eccentric center butterfly valve which comprises a valve body, a valve rod, a valve seat and a control mechanism, the valve seat is fixedly sleeved with the valve body, a valve plate assembly is rotationally arranged in the valve body and fixedly sleeved with the valve rod, a filter plate is fixedly sleeved with the valve body, and the valve rod is fixedly sleeved with the filter plate. And the side surface of the filter plate is elastically connected with a blockage clearing mechanism. By means of rotation opening and closing control of the valve plate assembly and cooperation of elastic connection and arc-shaped arrangement of the unblocking mechanism, in the reciprocating rotation process of the valve plate assembly, reciprocating movement of the unblocking mechanism is achieved, a filter plate is subjected to reciprocating treatment, automatic unblocking is achieved through the vibration or direct pushing effect, disassembly treatment is not needed, and operation is convenient. And additional unblocking power does not need to be provided, simple and effective automatic unblocking operation is achieved, particulate matter is effectively prevented from being blocked between the valve seat and the valve plate assembly, and meanwhile simple and effective unblocking operation is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of butterfly valves, and in particular relates to a composite metal-sealed triple-eccentric butterfly valve. Background Art

[0002] The triple eccentric butterfly valve is a special type of valve. Its characteristics are that the valve stem axis deviates from the center of the disc and the center of the body at the same time, and the valve seat rotation axis and the valve body channel axis have a certain angle. The triple eccentric butterfly valve is a valve type with excellent cutting performance and durability. Its unique triple eccentric design makes it widely used in various industrial fields.

[0003] The composite metal sealed three-eccentric butterfly valve in the prior art is usually a composite metal sealed type composed of metal and non-metallic materials during use. It has the strength and wear resistance of metal materials, and the elasticity and sealing of non-metallic materials. However, in actual use, it is affected by solid impurities in the input fluid. When the valve plate is closed, solid particles are pressed between the valve plate and the valve seat, resulting in a loose closure and gaps, which affects the sealing. However, when a filter mesh plate is used to filter the solid particles at the inlet, the continuously filtered and accumulated solid particles are blocked in the mesh plate holes, which are difficult to clean, affecting the final conduction effect of the three-eccentric butterfly valve, resulting in poor use effect and troublesome clearing operation. Summary of the invention

[0004] The object of the present invention is to provide a composite metal sealed triple eccentric butterfly valve to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a composite metal sealed three-eccentric butterfly valve, comprising a valve body, a valve stem, a valve seat and a control mechanism, the valve seat is fixedly sleeved in the valve body, a valve plate assembly is rotatably provided in the valve body, the valve plate assembly is fixedly sleeved with the valve stem, a filter plate is fixedly sleeved inside the valve body, a clearing mechanism is elastically connected to the side of the filter plate, the valve plate assembly intermittently pushes the clearing mechanism to operate and completes the clearing action of the filter plate when rotating, a sealing assembly sleeved on the outside of the valve stem is provided at the bottom of the valve body, and a bottom seat is fixedly provided at the bottom of the valve body.

[0006] Preferably, the valve stem is rotatably sleeved inside the valve body, the control mechanism is fixed on the top of the valve body and controls the rotation of the valve stem, the valve plate assembly swings in the valve seat, and the filter plate is provided with filter holes on the front side.

[0007] Preferably, the blockage clearing mechanism is a vibrating cleaning part, which includes an arc rod 1, a push rod 1 and a spring 1. One end of the push rod 1 is movably connected to the filter plate, and the other end is fixedly connected to the arc rod 1. The spring 1 is fixed between the arc rod 1 and the filter plate.

[0008] Preferably, the clearing mechanism is a pushing cleaning part, which includes a connecting plate, two arc-shaped rods, a cleaning rod, two push rods and two springs. The cleaning rods are fixedly connected to the front side of the connecting plate, and the cleaning rods correspond one to one with the filter holes on the filter plate. The diameter of the cleaning rods is smaller than the diameter of the filter holes. One end of the two push rods is movably connected to the filter plate, and the other end is fixedly connected to the connecting plate. The two springs are fixedly connected between the connecting plate and the filter plate, and the two arc-shaped rods are eccentrically fixed to the outer side of the connecting plate.

[0009] Preferably, the valve plate assembly includes a mounting seat, a metal outer plate, a rubber inner ring and a connecting seat. The connecting seat is fixed on the outer side arc surface of the mounting seat and is fixedly sleeved with the valve stem. The metal outer plate is fixed on the front side of the mounting seat. The rubber inner ring is sleeved on the outer surface of the mounting seat. When the valve plate assembly is rotated to open, it pushes the clearing mechanism to elastically compress.

[0010] Preferably, the valve plate assembly also includes a No. 1 port, a connecting port, an outer ring groove and an inner ring groove, the No. 1 port is opened on the metal outer plate, the connecting port is opened on the front side of the mounting seat, the inner ring groove and the outer ring groove are both opened on the mounting seat, the inner ring groove is connected with the outer ring groove, the outer ring groove is opened on the outer side of the mounting seat, the rubber inner ring is sleeved in the outer ring groove, and the two ends of the connecting port are respectively connected with the inner ring groove and the No. 1 port.

[0011] Preferably, the bottom seat includes a bottom sleeve, a bottom cover, a curved tube and a notched groove, the bottom sleeve is fixed to the bottom of the valve body and sleeved on the outer side of the bottom end of the valve stem, the bottom cover is threadedly sleeved in the bottom sleeve, the curved tube is fixedly connected to the bottom of the bottom cover and communicated with the interior of the bottom cover, the notched groove is opened on the inner wall of the bottom cover, the bottom seat is filled with lubricating oil, and a sealing plug is provided at the end of the curved tube.

[0012] Preferably, the sealing assembly includes a sealing sleeve 1, a sealing sleeve 2 and an internal groove, the sealing sleeve 1 and the sealing sleeve 2 are both located in the inner wall of the bottom of the valve body and are sleeved on the outer side of the valve stem, the sealing sleeve 2 is located above the sealing sleeve 1, and the internal groove is opened at the bottom of the sealing sleeve 1 and is connected to the notch groove below.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention utilizes the rotation opening and closing control of the valve plate assembly, cooperates with the elastic connection and arc-shaped arrangement of the clearing mechanism, realizes the reciprocating movement of the clearing mechanism during the reciprocating rotation of the valve plate assembly, and reciprocates the filter plate, and realizes automatic clearing by utilizing the effect of vibration or direct pushing. There is no need to disassemble the filter plate for processing, and no need to provide additional clearing power, thereby realizing a simple and effective automatic clearing operation, effectively avoiding the jamming of particles between the valve seat and the valve plate assembly, and realizing a simple and effective clearing operation.

[0015] 2. The present invention utilizes the No. 1 port, the connecting port, the inner ring groove and the outer ring groove in the valve plate assembly. After the valve is closed, pressurized water is filled into the inner ring groove and acts on the rubber inner ring. When the hydraulic pressure on the sealing side is high, the liquid pressure is used to actively strengthen the seal, realize the outward expansion of the rubber inner ring, strengthen the seal, and achieve good anti-leakage effect.

[0016] 3. The present invention utilizes the input effect of the bottom seat and cooperates with the sealing assembly after the lubricating oil is input, so that the lubricating oil fills the bottom outer side of the valve stem and adheres to the outer surface of the valve stem, thereby achieving lubrication, improving the smoothness of the valve stem rotation, avoiding wear and friction that makes the valve difficult to open and close, and having a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram of embodiment 1 of the present invention;

[0019] Figure 3 is a schematic diagram of a vibrating cleaning unit according to Embodiment 1 of the present invention;

[0020] Figure 4 It is an exploded schematic diagram of the valve plate assembly of the present invention;

[0021] Figure 5 is a cross-sectional schematic diagram of the mounting seat of the present invention;

[0022] Figure 6 is a cross-sectional schematic diagram of embodiment 2 of the present invention;

[0023] Figure 7 A schematic diagram of a cleaning pusher in Embodiment 2 of the present invention;

[0024] Figure 8 is a schematic diagram of the bottom seat and the sealing assembly of the present invention;

[0025] Fig. 9 It is a bottom schematic diagram of the sealing assembly of the present invention.

[0026] In the figure: 1. valve body; 2. valve stem; 3. control mechanism; 4. bottom seat; 41. bottom sleeve; 42. bottom cover; 43. curved pipe; 44. notched groove; 5. sealing assembly; 51. sealing sleeve 1; 52. sealing sleeve 2; 53. internal groove; 6. valve seat; 7. valve plate assembly; 71. mounting seat; 72. metal outer plate; 73. rubber inner ring; 74. connecting seat; 75. No. 1 port; 76. connecting port; 77. outer ring groove; 78. inner ring groove; 8. filter plate; 9. vibration cleaning part; 91. arc rod 1; 92. push rod 1; 93. spring 1; 10. push cleaning part; 101. connecting plate; 102. arc rod 2; 103. cleaning rod; 104. push rod 2; 105. spring 2. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 9 As shown, the embodiment of the present invention provides a composite metal sealed three-eccentric butterfly valve, including a valve body 1, a valve stem 2, a valve seat 6 and a control mechanism 3. The valve seat 6 is fixedly sleeved in the valve body 1. A valve plate assembly 7 is rotatably provided in the valve body 1. The valve plate assembly 7 is fixedly sleeved with the valve stem 2. A filter plate 8 is fixedly sleeved inside the valve body 1. A clearing mechanism is elastically connected to the side of the filter plate 8. When the valve plate assembly 7 rotates, the clearing mechanism is intermittently pushed to operate and complete the clearing action of the filter plate 8. A sealing assembly 5 sleeved on the outside of the valve stem 2 is provided at the bottom of the valve body 1. A bottom seat 4 is fixedly provided at the bottom of the valve body 1, a valve stem 2 is rotatably sleeved inside the valve body 1, a control mechanism 3 is fixed at the top of the valve body 1 and controls the rotation of the valve stem 2, a valve plate assembly 7 swings in the valve seat 6, a filter plate 8 is provided with filter holes on the front, and a clearing mechanism is a vibration cleaning part 9, the vibration cleaning part 9 includes an arc rod 91, a push rod 92 and a spring 93, one end of the push rod 92 is movably sleeved with the filter plate 8, and the other end is fixedly connected to the arc rod 91, and a spring 93 is fixed between the arc rod 91 and the filter plate 8.

[0029] Embodiment 1: When in use, as the water flows into the valve body 1, solid particles are filtered on the outside of the filter plate 8, and some impurities are blocked in the filter holes. As the control mechanism 3 rotates, the valve stem 2 rotates, and drives the valve plate assembly 7 to rotate eccentrically, opening the valve seat 6. When the butterfly valve is fully opened, the valve plate assembly 7 is vertical in the valve body 1 and pushes the arc rod 91 in the vibration cleaning part 9, so that the arc rod 91 drives the push rod 92 to slide along the filter plate 8. While compressing the spring 93, the arc rod 91 hits the filter plate 8. When the rotation of the valve plate assembly 7 is repeatedly controlled to open and close the valve, the arc rod 91 is repeatedly pushed to hit the filter plate 8, thereby realizing vibration treatment and completing the vibration cleaning of the blockage in the filter hole.

[0030] By utilizing the rotation opening and closing control of the valve plate assembly 7, in conjunction with the elastic connection and arc-shaped arrangement of the vibration cleaning part 9, during the reciprocating rotation of the valve plate assembly 7, the reciprocating movement of the vibration cleaning part 9 is achieved, and the filter plate 8 is reciprocated and vibrated, and automatic blockage clearing is achieved by utilizing the vibration effect, without the need for disassembly and processing, and without the need for additional power for clearing the blockage, thereby achieving a simple and effective automatic blockage clearing operation.

[0031] Among them, the clearing mechanism is a pushing cleaning part 10, which includes a connecting plate 101, an arc rod 102, a cleaning rod 103, a push rod 104 and a spring 105. The cleaning rod 103 is fixedly connected to the front of the connecting plate 101, and the cleaning rod 103 corresponds to the filter holes on the filter plate 8 one by one. The diameter of the cleaning rod 103 is smaller than the diameter of the filter holes. One end of the push rod 104 is movably connected to the filter plate 8, and the other end is fixedly connected to the connecting plate 101. The spring 105 is fixedly connected between the connecting plate 101 and the filter plate 8. The arc rod 102 is eccentrically fixed to the outer surface of the connecting plate 101.

[0032] Embodiment 2: When in use, as the water flows into the valve body 1, solid particles are filtered on the outside of the filter plate 8, and some impurities are blocked in the filter holes. As the control mechanism 3 rotates, the valve stem 2 rotates, and drives the valve plate assembly 7 to rotate eccentrically to open the valve seat 6. When the valve is opened, the valve plate assembly 7 swings eccentrically and pushes the eccentrically arranged arc rod 2 102 in the cleaning part 10, so that the arc rod 2 102 drives the connecting plate 101 to move, and drives the cleaning rod 103 to move. The corresponding cleaning rods 103 are inserted into the filter holes to directly clean the blockages in the filter holes, and the spring 2 105 is compressed. When the valve plate assembly 7 is repeatedly controlled to rotate to open and close the valve, the cleaning rod 103 is repeatedly pushed to achieve push cleaning and complete the clearing of the filter holes.

[0033] Among them, the valve plate assembly 7 includes a mounting seat 71, a metal outer plate 72, a rubber inner ring 73 and a connecting seat 74. The connecting seat 74 is fixed on the outer side arc surface of the mounting seat 71 and is fixedly sleeved with the valve stem 2. The metal outer plate 72 is installed and fixed on the front side of the mounting seat 71. The rubber inner ring 73 is sleeved on the outer surface of the mounting seat 71. When the valve plate assembly 7 is rotated to open, the clearing mechanism is pushed to be elastically compressed. The valve plate assembly 7 also includes a No. 1 port 75, a connecting port 76, an outer ring groove 77 and an inner ring groove 78. The No. 1 port 75 is opened on the metal outer plate 72, the connecting port 76 is opened on the front side of the mounting seat 71, the inner ring groove 78 and the outer ring groove 77 are both opened on the mounting seat 71, the inner ring groove 78 is connected with the outer ring groove 77, and the outer ring groove 77 is opened on the outer side surface of the mounting seat 71. The rubber inner ring 73 is sleeved in the outer ring groove 77, and the two ends of the connecting port 76 are respectively connected with the inner ring groove 78 and the No. 1 port 75.

[0034] Embodiment 3: When the valve is closed, the valve plate assembly 7 is pressed into the interior of the valve seat 6, the incoming water flow acts on the metal outer plate 72 of the valve plate assembly 7, and enters the inner ring groove 78 through the No. 1 port 75 and the connecting port 76, pushing the rubber inner ring 73 in the outer ring groove 77 to expand outward, further pressing the inner wall of the valve seat 6 to complete the enhanced seal.

[0035] By utilizing the No. 1 port 75, the connecting port 76, the inner ring groove 78 and the outer ring groove 77 in the valve plate assembly 7, after the valve is closed, pressurized water is used to fill the inner ring groove 78 and act on the rubber inner ring 73. When the hydraulic pressure on the sealing side is high, the hydraulic pressure is used to actively strengthen the seal, realize the outward expansion of the rubber inner ring 73, strengthen the seal, and achieve good anti-leakage effect.

[0036] Among them, the bottom seat 4 includes a bottom sleeve 41, a bottom cover 42, a curved tube 43 and a notch groove 44. The bottom sleeve 41 is fixed to the bottom of the valve body 1 and is sleeved on the outer side of the bottom end of the valve stem 2. The bottom cover 42 is threadedly sleeved in the bottom sleeve 41. The curved tube 43 is fixedly connected to the bottom of the bottom cover 42 and is communicated with the inside of the bottom cover 42. The notch groove 44 is opened on the inner wall of the bottom cover 42. The bottom seat 4 is filled with lubricating oil. A sealing plug is provided at the end of the curved tube 43. The sealing assembly 5 includes a sealing sleeve 1 51, a sealing sleeve 2 52 and an internal groove 53. The sealing sleeve 1 51 and the sealing sleeve 2 52 are both located in the bottom inner wall of the valve body 1 and are sleeved on the outer side of the valve stem 2. The sealing sleeve 2 52 is located above the sealing sleeve 1 51. The internal groove 53 is opened at the bottom of the sealing sleeve 1 51 and is communicated with the notch groove 44 below.

[0037] Embodiment 4: After using for a period of time, open the sealing plug in the curved tube 43 of the bottom seat 4, input lubricating oil into the interior and seal it. The lubricating oil is squeezed into the internal groove 53 of the sealing assembly 5 through the notch groove 44 in the bottom cover 42. As the valve stem 2 rotates, the lubricating oil fully adheres to the outer surface of the valve stem 2 to complete the lubrication, and the valve stem 2 rotates smoothly and stably.

[0038] By utilizing the input effect of the bottom seat 4 and cooperating with the sealing assembly 5 after the lubricating oil is input, the lubricating oil fills the bottom outer side of the valve stem 2 and adheres to the outer surface of the valve stem 2, thereby achieving lubrication, improving the smoothness of the rotation of the valve stem 2, avoiding wear and friction that make the valve difficult to open and close, and achieving good use effect.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite metal-sealed triple-eccentric butterfly valve, comprising a valve body (1), a valve stem (2), a valve seat (6) and a control mechanism (3), characterized in that: The valve seat (6) is fixedly sleeved in the valve body (1), a valve plate assembly (7) is rotatably provided in the valve body (1), the valve plate assembly (7) is fixedly sleeved with the valve stem (2), a filter plate (8) is fixedly sleeved inside the valve body (1), a clearing mechanism is elastically connected to the side of the filter plate (8), the valve plate assembly (7) intermittently pushes the clearing mechanism to operate and completes the clearing action of the filter plate (8) when rotating, a sealing assembly (5) sleeved on the outside of the valve stem (2) is provided at the bottom of the valve body (1), and a bottom seat (4) is fixedly provided at the bottom of the valve body (1).

2. A composite metal sealed triple eccentric butterfly valve according to claim 1, characterized in that: The valve stem (2) is rotatably sleeved inside the valve body (1), the control mechanism (3) is fixed on the top of the valve body (1) and controls the rotation of the valve stem (2), the valve plate assembly (7) swings in the valve seat (6), and the filter plate (8) is provided with filter holes on the front side.

3. A composite metal sealed triple eccentric butterfly valve according to claim 2, characterized in that: The blockage clearing mechanism is a vibration cleaning part (9), which comprises an arc-shaped rod (91), a push rod (92) and a spring (93), one end of the push rod (92) being movably sleeved with the filter plate (8), and the other end of the push rod (92) being fixedly connected with the arc-shaped rod (91), and the spring (93) being fixed between the arc-shaped rod (91) and the filter plate (8).

4. A composite metal sealed triple eccentric butterfly valve according to claim 2, characterized in that: The blockage clearing mechanism is a pushing cleaning part (10), and the pushing cleaning part (10) comprises a connecting plate (101), a second arc-shaped rod (102), a cleaning rod (103), a second push rod (104) and a second spring (105). The cleaning rod (103) is fixedly connected to the front side of the connecting plate (101), the cleaning rod (103) corresponds to the filter holes on the filter plate (8) one by one, the diameter of the cleaning rod (103) is smaller than the diameter of the filter holes, one end of the second push rod (104) is movably sleeved with the filter plate (8), and the other end is fixedly connected to the connecting plate (101), the second spring (105) is fixedly connected between the connecting plate (101) and the filter plate (8), and the second arc-shaped rod (102) is eccentrically fixed to the outer side of the connecting plate (101).

5. The composite metal sealed triple eccentric butterfly valve according to claim 2, characterized in that: The valve plate assembly (7) comprises a mounting seat (71), a metal outer plate (72), a rubber inner ring (73) and a connecting seat (74); the connecting seat (74) is fixed on the outer side arc surface of the mounting seat (71) and is fixedly sleeved with the valve stem (2); the metal outer plate (72) is fixedly mounted on the front side of the mounting seat (71); the rubber inner ring (73) is sleeved on the outer surface of the mounting seat (71); when the valve plate assembly (7) is rotated to open, the clearing mechanism is pushed to be elastically compressed.

6. A composite metal sealed triple eccentric butterfly valve according to claim 5, characterized in that: The valve plate assembly (7) also includes a No. 1 port (75), a connecting port (76), an outer ring groove (77) and an inner ring groove (78); the No. 1 port (75) is provided on the metal outer plate (72); the connecting port (76) is provided on the front face of the mounting seat (71); the inner ring groove (78) and the outer ring groove (77) are both provided on the mounting seat (71); the inner ring groove (78) is connected to the outer ring groove (77); the outer ring groove (77) is provided on the outer side of the mounting seat (71); the rubber inner ring (73) is sleeved in the outer ring groove (77); and the two ends of the connecting port (76) are respectively connected to the inner ring groove (78) and the No. 1 port (75).

7. The composite metal sealed triple eccentric butterfly valve according to claim 1, characterized in that: The bottom seat (4) comprises a bottom sleeve (41), a bottom cover (42), a curved pipe (43) and a notched groove (44); the bottom sleeve (41) is fixed to the bottom of the valve body (1) and is sleeved on the outer side of the bottom end of the valve stem (2); the bottom cover (42) is threadedly sleeved in the bottom sleeve (41); the curved pipe (43) is fixedly connected to the bottom of the bottom cover (42) and is communicated with the inside of the bottom cover (42); the notched groove (44) is formed on the inner wall of the bottom cover (42); the bottom seat (4) is filled with lubricating oil; and a sealing plug is provided at the end of the curved pipe (43).

8. The composite metal sealed triple eccentric butterfly valve according to claim 7, characterized in that: The sealing assembly (5) comprises a sealing sleeve 1 (51), a sealing sleeve 2 (52) and an internal groove (53); the sealing sleeve 1 (51) and the sealing sleeve 2 (52) are both located in the inner wall at the bottom of the valve body (1) and are sleeved on the outer side of the valve stem (2); the sealing sleeve 2 (52) is located above the sealing sleeve 1 (51); and the internal groove (53) is opened at the bottom of the sealing sleeve 1 (51) and is connected to the notch groove (44) below.

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