Eccentric butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses an eccentric butterfly valve which comprises a valve body, a butterfly plate and a first valve rod are arranged in the valve body, an installation frame is fixedly installed above the valve body, and a worm and gear driving assembly is installed at the top of the installation frame. Through cooperation of the rectangular positioning block, the bidirectional lead screw, the rotary knob, the push plates, the positioning insertion rods, the through opening, the positioning insertion groove, the first L-shaped supporting frame, the first bearing and the protective cap, the positions of the two push plates can be adjusted conveniently, the push plates drive one ends of the positioning insertion rods to move out of the positioning insertion grooves, then the first bolt and the second bolt are disassembled respectively, and the positioning insertion rods can be adjusted conveniently. The first valve rod can be taken out from the interior of the valve body by rotating the first bearing and moving the protective cover, the second bearing and the first valve rod downwards, at the moment, the butterfly plate can be detached, the first valve rod and a new butterfly plate can be reinstalled in the same mode, the butterfly plate can be conveniently and independently installed, the use cost of the butterfly valve is reduced, and the service life of the butterfly valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, and more particularly to an eccentric butterfly valve. Background Art

[0002] Eccentric butterfly valves are categorized as single, double, triple, and variable eccentric. These are the opposite of concentric butterfly valves. Eccentric butterfly valves are characterized by a valve stem axis that deviates from both the disc and body centers, and a sealing pair with an oblique cone. Eccentric butterfly valves are primarily used for handling fluids such as liquids, gases, and steam, primarily for flow interception and regulation. They consist of a valve body, disc, valve seat, valve shaft, and control device. The valve shaft and disc are controlled by a control device. Rotation of the disc controls the opening and closing of the valve. The valve has bidirectional flow, providing sealing and flow control in both forward and reverse directions.

[0003] At present, when the eccentric butterfly valve works for a long time, the butterfly plate needs to bear the pressure of the fluid, which will easily cause damage over time. When the butterfly plate is damaged, the entire butterfly valve is usually replaced directly, and the butterfly plate cannot be replaced alone, which increases the cost of using the butterfly valve and needs to be improved. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an eccentric butterfly valve to solve the problems existing in the above-mentioned background technology.

[0005] The cam is secured to the upper edge of the valve body with a secure fit for the cam, and a push-pull mechanism is engaged with the push-pull mechanism, wherein the push-pull mechanism is engaged with the push-pull mechanism, and the push-pull mechanism is engaged with the push-pull mechanism, wherein the push-pull mechanism is engaged with the push-pull mechanism, and the push-pull mechanism is engaged with the push-pull mechanism.

[0006] Furthermore, a rectangular positioning groove is provided at the top end of the No. 1 valve stem, a rectangular positioning block is fixedly connected to the inside of the bottom end of the No. 2 valve stem, and the outer wall of the rectangular positioning block is inserted into the inside of the rectangular positioning groove.

[0007] Furthermore, an L-shaped support frame No. 1 is fixedly connected to the lower right side of the No. 2 valve stem, and a bearing No. 1 is fixedly installed to the lower right side of the No. 1 L-shaped support frame. The right end of the outer wall of the bidirectional screw rod is rotatably connected to the inside of the No. 1 bearing, and the right end of the bidirectional screw rod is fixedly connected to a knob.

[0008] Furthermore, a protective cap is provided on the right side of the No. 1 L-shaped support frame, and an annular connecting groove is opened on the right side of the No. 1 L-shaped support frame. One end of the protective cap is threadedly connected to the inside of the annular connecting groove, and the knob is located inside the protective cap.

[0009] Furthermore, a No. 2 L-shaped support frame is fixedly connected to the lower left side of the No. 2 valve stem, the left end of the bidirectional screw rod is rotatably connected to the inner wall of the No. 2 L-shaped support frame, and the upper part of the two push plates is slidably connected to the outer walls of the No. 1 L-shaped support frame and the No. 2 L-shaped support frame.

[0010] Furthermore, the front of the butterfly plate is fixedly connected to two mounting blocks, the outer wall of the No. 1 valve stem is movably sleeved inside the mounting block, and the front of the two mounting blocks is provided with a No. 1 bolt, one end of the No. 1 bolt is threadedly connected to the inside of the mounting block and the No. 1 valve stem.

[0011] Furthermore, a protective cover is provided at the bottom end of the valve body, and a No. 2 bolt is threadedly connected to the upper part of both sides of the protective cover, one end of the No. 2 bolt is threadedly connected to the bottom of the valve body, and a No. 2 bearing is fixedly installed inside the protective cover, and the bottom end of the No. 1 valve stem extends to the inside of the protective cover and is rotatably connected to the inside of the No. 2 bearing.

[0012] The technical effects and advantages of this utility model are:

[0013] 1. The utility model facilitates adjustment of the positions of the two push plates through the cooperation of the rectangular positioning block, the two-way screw rod, the knob, the push plate, the positioning rod, the through port, the positioning slot, the No. 1 L-shaped support frame, the No. 1 bearing and the protective cap. The push plate drives one end of the positioning rod to move out from the inside of the positioning slot, and then the No. 1 bolt and the No. 2 bolt are removed respectively, and the protective cover, the No. 2 bearing and the No. 1 valve stem are moved downward, so that the No. 1 valve stem can be taken out from the inside of the valve body. At this time, the disc plate can be removed, and the No. 1 valve stem and the new disc plate can be reinstalled in the same way, which makes it convenient to separate the butterfly plate, reduce the use cost of the butterfly valve, and increase the service life of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model.

[0016] Figure 3It is an enlarged schematic diagram of the structure at point A of the present utility model.

[0017] Figure 4 This is a schematic cross-sectional view of the side structure of valve stem No. 1 and mounting block of the utility model.

[0018] The accompanying drawings are marked as follows: 1. valve body; 2. butterfly plate; 3. valve stem No. 1; 31. rectangular positioning groove; 4. mounting bracket; 5. worm gear drive assembly; 6. disassembly and assembly mechanism; 61. valve stem No. 2; 62. rectangular positioning block; 63. bidirectional screw rod; 631. knob; 64. push plate; 65. positioning rod; 66. through port; 67. positioning slot; 68. L-shaped support bracket No. 1; 681. bearing No. 1; 682. protective cap; 69. L-shaped support bracket No. 2; 7. mounting block; 8. bolt No. 1; 9. protective cover; 10. bearing No. 2; 11. bolt No. 2. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely examples. The eccentric butterfly valve involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example 1:

[0021] like Figure 1-4As shown, an eccentric butterfly valve comprises a valve body 1, a butterfly plate 2 and a No. 1 valve stem 3 are provided inside the valve body 1, a mounting bracket 4 is fixedly mounted above the valve body 1, a worm gear drive assembly 5 is mounted on the top of the mounting bracket 4, a disassembly mechanism 6 is provided between the valve body 1 and the worm gear drive assembly 5, the disassembly mechanism 6 comprises a No. 2 valve stem 61, the top end of the No. 2 valve stem 61 is fixedly mounted on the output end of the worm gear drive assembly 5, the top end of the No. 1 valve stem 3 extends to the top of the valve body 1 and is movably sleeved on the No. 2 valve stem 3. Inside the bottom end of the valve stem 61, a two-way screw rod 63 is movably sleeved inside the bottom of the second valve stem 61. The outer wall of the two-way screw rod 63 is symmetrically threaded with two push plates 64. A positioning rod 65 is fixedly connected to the bottom of one side of each push plate 64. A through hole 66 is opened below both sides of the second valve stem 61, and a positioning slot 67 is opened above both sides of the first valve stem 3. One end of the positioning rod 65 is inserted into the inside of the positioning slot 67 through the through hole 66. A rectangular positioning groove is opened on the top of the first valve stem 3 31, the bottom end of the second valve stem 61 is fixedly connected to a rectangular positioning block 62, the outer wall of the rectangular positioning block 62 is inserted into the interior of the rectangular positioning groove 31, the lower right side of the second valve stem 61 is fixedly connected to the No. 1 L-shaped support frame 68, the lower right side of the No. 1 L-shaped support frame 68 is fixedly installed with a No. 1 bearing 681, the right end of the outer wall of the two-way screw rod 63 is rotatably connected to the interior of the No. 1 bearing 681, the right end of the two-way screw rod 63 is fixedly connected to the knob 631, and the right side of the No. 1 L-shaped support frame 68 is fixedly installed with a No. 1 bearing 681. A protective cap 682 is provided on the side, and an annular connecting groove is opened on the right side of the No. 1 L-shaped support frame 68. One end of the protective cap 682 is threadedly connected to the inside of the annular connecting groove, and the knob 631 is located inside the protective cap 682. The No. 2 L-shaped support frame 69 is fixedly connected to the lower left side of the No. 2 valve stem 61, and the left end of the two-way screw rod 63 is rotatably connected to the inner wall of the No. 2 L-shaped support frame 69. The upper inside of the two push plates 64 is slidably connected to the outer walls of the No. 1 L-shaped support frame 68 and the No. 2 L-shaped support frame 69.

[0022] In this embodiment, the protective cap 682 is provided to facilitate protection of the knob 631, and the rectangular positioning block 62 is inserted into the interior of the rectangular positioning groove 31 to facilitate limiting the position between the top end of the No. 1 valve stem 3 and the bottom end of the No. 2 valve stem 61, and one end of the positioning rod 65 is inserted into the interior of the positioning slot 67 through the opening 66 to increase the stability of the connection between the top end of the No. 1 valve stem 3 and the bottom end of the No. 2 valve stem 61.

[0023] Example 2:

[0024] like Figure 1-4As shown, the front of the butterfly plate 2 is fixedly connected to two mounting blocks 7, the outer wall of the No. 1 valve stem 3 is movably sleeved inside the mounting block 7, and the front of the two mounting blocks 7 is provided with a No. 1 bolt 8, one end of the No. 1 bolt 8 is threadedly connected to the inside of the mounting block 7 and the No. 1 valve stem 3, and the bottom end of the valve body 1 is provided with a protective cover 9, and the upper part of both sides of the protective cover 9 is threadedly connected with a No. 2 bolt 11, one end of the No. 2 bolt 11 is threadedly connected to the bottom of the valve body 1, and a No. 2 bearing 10 is fixedly installed inside the protective cover 9, and the bottom end of the No. 1 valve stem 3 extends to the inside of the protective cover 9 and is rotatably connected to the inside of the No. 2 bearing 10.

[0025] In this embodiment, the provision of the No. 1 bolt 8 facilitates the fixed connection between the mounting block 7 and the No. 1 valve stem 3. At the same time, since the butterfly plate 2 and the mounting block 7 are fixedly connected, the No. 1 valve stem 3 is convenient for controlling the opening and closing of the butterfly plate 2 through the mounting block 7. The provision of the No. 2 bolt 11 facilitates the installation of the protective cover 9 at the bottom of the valve body 1, and the provision of the No. 2 bearing 10 inside the protective cover 9 allows the bottom end of the No. 1 valve stem 3 to rotate inside the protective cover 9.

[0026] In summary, if Figure 1-4As shown, this eccentric butterfly valve, when in use, if the butterfly plate 2 needs to be replaced, the staff first screws off the protective cap 682, and then rotates the knob 631 and the two-way screw rod 63. The two-way screw rod 63 drives the two push plates 64 to slide horizontally on the outer walls of the No. 1 L-shaped support frame 68 and the No. 2 L-shaped support frame 69. The push plate 64 simultaneously drives one end of the positioning plug rod 65 to move out from the inside of the positioning slot 67, and then removes the No. 1 bolt 8 and the No. 2 bolt 11 respectively, and moves the protective cover 9, the No. 2 bearing 10 and the No. 1 valve stem 3 downward, so that the rectangular positioning groove 31 at the top of the No. 1 valve stem 3 is separated from the outer wall of the rectangular positioning block 62. At the same time, the top end of the No. 1 valve stem 3 moves downward and sequentially separates from the top of the valve body 1, the inside of the two mounting blocks 7 and the bottom of the valve body 1. At this time, the butterfly plate 2 inside the valve body 1 can be removed, and the new butterfly plate 2 is placed inside the valve body 1, and the protective cover 9, the No. 2 bearing 10 and the No. 1 valve stem 3 are moved to penetrate the top of the No. 1 valve stem 3 1, and then the No. 1 bolt 8 is connected to the interior of the mounting block 7 and the No. 1 valve stem 3, so that the No. 1 valve stem 3 is connected to the butterfly plate 2 through the mounting block 7, and the butterfly plate 2 can be replaced.

[0027] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0028] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.

[0029] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An eccentric butterfly valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a butterfly plate (2) and a No. 1 valve stem (3) inside, a mounting frame (4) is fixedly installed above the valve body (1), a worm gear drive assembly (5) is installed on the top of the mounting frame (4), a disassembly mechanism (6) is provided between the valve body (1) and the worm gear drive assembly (5), the disassembly mechanism (6) includes a No. 2 valve stem (61), the top end of the No. 2 valve stem (61) is fixedly installed on the output end of the worm gear drive assembly (5), the top end of the No. 1 valve stem (3) extends to the top of the valve body (1) and is movably sleeved on the No. 1 valve stem (3). Inside the bottom end of the No. 2 valve stem (61), a two-way screw rod (63) is movably sleeved inside the bottom of the No. 2 valve stem (61), and the outer wall of the two-way screw rod (63) is symmetrically threaded with two push plates (64), and a positioning rod (65) is fixedly connected to the bottom of one side of the two push plates (64). A through hole (66) is opened below both sides of the No. 2 valve stem (61), and a positioning slot (67) is opened above both sides of the No. 1 valve stem (3), and one end of the positioning rod (65) is inserted into the inside of the positioning slot (67) through the through hole (66).

2. The eccentric butterfly valve according to claim 1, characterized in that: A rectangular positioning groove (31) is provided at the top end of the No. 1 valve stem (3), and a rectangular positioning block (62) is fixedly connected to the inside of the bottom end of the No. 2 valve stem (61), and the outer wall of the rectangular positioning block (62) is inserted into the inside of the rectangular positioning groove (31).

3. The eccentric butterfly valve according to claim 1, characterized in that: The lower right side of the No. 2 valve stem (61) is fixedly connected to the No. 1 L-shaped support frame (68), the lower right side of the No. 1 L-shaped support frame (68) is fixedly installed with the No. 1 bearing (681), the right end of the outer wall of the bidirectional screw rod (63) is rotatably connected to the inside of the No. 1 bearing (681), and the right end of the bidirectional screw rod (63) is fixedly connected to the knob (631).

4. The eccentric butterfly valve according to claim 3, characterized in that: A protective cap (682) is provided on the right side of the No. 1 L-shaped support frame (68), an annular connecting groove is provided on the right side of the No. 1 L-shaped support frame (68), one end of the protective cap (682) is threadedly connected to the inside of the annular connecting groove, and the knob (631) is located inside the protective cap (682).

5. The eccentric butterfly valve according to claim 1, characterized in that: A No. 2 L-shaped support frame (69) is fixedly connected to the lower left side of the No. 2 valve stem (61), the left end of the bidirectional screw rod (63) is rotatably connected to the inner wall of the No. 2 L-shaped support frame (69), and the upper inside of the two push plates (64) is slidably connected to the outer walls of the No. 1 L-shaped support frame (68) and the No. 2 L-shaped support frame (69).

6. The eccentric butterfly valve according to claim 1, characterized in that: The front of the butterfly plate (2) is fixedly connected to two mounting blocks (7), the outer wall of the No. 1 valve stem (3) is movably sleeved inside the mounting block (7), and the front of the two mounting blocks (7) is provided with a No. 1 bolt (8), one end of the No. 1 bolt (8) is threadedly connected to the inside of the mounting block (7) and the No. 1 valve stem (3).

7. The eccentric butterfly valve according to claim 1, characterized in that: A protective cover (9) is provided at the bottom end of the valve body (1), and a No. 2 bolt (11) is threadedly connected to the upper part of both sides of the protective cover (9), one end of the No. 2 bolt (11) is threadedly connected to the bottom of the valve body (1), and a No. 2 bearing (10) is fixedly installed inside the protective cover (9), and the bottom end of the No. 1 valve stem (3) extends to the inside of the protective cover (9) and is rotatably connected to the inside of the No. 2 bearing (10).

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