Wear-resistant butterfly valve

Abstract

The utility model relates to the technical field of valves, in particular to a wear-resistant butterfly valve. According to the technical scheme, the valve comprises a gear box, a lower valve rod, a valve shell and a valve plate, the lower valve rod is arranged at the lower end of the valve shell through a lower lifting assembly, the lower lifting assembly is used for controlling the lower valve rod to ascend and descend along the valve shell, and the gear box is arranged at the upper end of the valve shell through an upper lifting assembly. The upper lifting assembly is used for controlling the gear box to ascend and descend along the valve shell, an upper valve rod is rotationally arranged on the gear box, the upper valve rod is rotationally inserted into the valve shell, and the valve plate is positioned in the valve shell through mutual insertion between the valve plate and the lower valve rod and between the valve plate and the upper valve rod. The upper valve rod and the lower valve rod can be respectively separated from the valve plate through the matching of the upper lifting assembly and the lower lifting assembly, so that the valve plate can be replaced without integrally disassembling the butterfly valve, the maintenance workload is reduced, and the butterfly valve has the excellent characteristic of convenience in maintenance.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially relates to a wear -resisting butterfly valve. BACKGROUND

[0002] As a common fluid control device, butterfly valve is widely used in petroleum, chemical industry, metallurgy, electric power and other industries, and its main function is to realize the on-off regulation of fluid through the deflection of valve plate. However, in the long-term use process, the valve plate, sealing ring and other components of butterfly valve are easy to be eroded by medium, which leads to the decrease of sealing performance and the increase of running resistance, affecting the normal operation of equipment. The replacement process of traditional butterfly valve after valve plate wear is complex, usually needs to disassemble the valve as a whole, which is time-consuming and laborious, and even affects the normal operation of pipeline system. Therefore, how to improve the wear resistance of butterfly valve and optimize the replacement mode of valve plate to reduce the maintenance cost and improve the service life of equipment has become a problem concerned by the industry.

[0003] Therefore, we propose a wear-resistant butterfly valve to solve the existing problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the problems in the background art, and provides a wear-resistant butterfly valve.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a wear-resistant butterfly valve, including gear box, lower valve rod, valve shell and valve plate, the lower end of the valve shell is provided with the lower valve rod through the lower lifting assembly, the lower lifting assembly is used for controlling the lifting action of the lower valve rod along the valve shell, the upper end of the valve shell is provided with the gear box through the upper lifting assembly, the upper lifting assembly is used for controlling the lifting action of the gear box along the valve shell.

[0006] The gear box is rotatably provided with an upper valve rod, the upper valve rod is rotatably inserted in the valve shell, and the valve plate is positioned in the valve shell through the mutual insertion between the lower valve rod and the upper valve rod.

[0007] Preferably, the upper lifting assembly is composed of an outer cylinder, a screw rod, a sliding rod and a paddle, the bottom end of the outer cylinder is rotatably arranged on the valve shell, the screw rod is threadedly engaged with the inner wall of the outer cylinder, and the top end of the screw rod is arranged on the gear box.

[0008] Preferably, the bottom end of the sliding rod is arranged on the valve shell, the upper end of the sliding rod is slidably inserted in the gear box, the paddle is arranged on the outer wall of the outer cylinder, and the upper valve rod penetrates the outer cylinder and the screw rod.

[0009] Preferably, the lower lifting assembly is composed of a main frame, a screw seat, a seat ring and a square rod, the main frame is arranged at the bottom end of the valve shell, the seat ring is arranged in the main frame, and the screw seat is rotatably arranged on the seat ring.

[0010] Preferably, the square rod is arranged at the bottom end of the main frame, the upper end of the square rod is inserted into the lower valve rod, and the lower valve rod is in threaded engagement with the screw base.

[0011] Preferably, an operating arm is arranged on the gear box and rotates, the operating arm is in toothed engagement with the top end of the upper valve rod through a transmission gear arranged in the gear box.

[0012] Preferably, the bottom end of the upper valve rod is in square design, and the square head of the bottom end of the upper valve rod is inserted into the upper end of the protrusion of the valve plate.

[0013] Preferably, a retaining ring is arranged on the valve shell through a bolt, and a sealing ring is arranged between the retaining ring and the valve plate.

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

[0015] In the use process of the wear-resistant butterfly valve, an operator rotates the operating arm manually, the upper valve rod is driven to rotate under the action of toothed engagement, the upper valve rod drives the valve plate to deflect, and the opening operation of the valve is performed.

[0016] When the valve plate needs to be replaced, the retaining ring is removed, the sealing ring is removed, then the gear box is driven to move upward through the upper lifting and lowering assembly, the upper valve rod is driven to move upward in the valve shell through the gear box, the upper valve rod is separated from the valve plate, then the lower valve rod is driven to move downward through the lower lifting and lowering assembly, the lower valve rod is separated from the valve plate, the valve plate can be disassembled, and after the replacement of the new valve plate is completed, the two upper and lower valve rods are re-inserted into the valve plate to position the valve plate in the valve shell.

[0017] When the upper lifting and lowering assembly works, an operator rotates the outer cylinder manually through a push piece, the outer cylinder and the screw rod are in threaded engagement, the gear box is limited by the slide rod and cannot be deflected, the screw rod and the gear box are controlled to perform lifting and lowering actions under the principle of the lead screw, and the gear box drives the upper valve rod to perform lifting and lowering.

[0018] When the lower lifting and lowering assembly works, an operator rotates the screw base manually, the lower valve rod cannot be deflected under the limitation of the square rod, and the lower valve rod is controlled to perform lifting and lowering actions under the principle of the lead screw.

[0019] The valve plate is made of wear-resistant material, the anti-washing capacity is improved, and the service life of the valve is prolonged.

[0020] The upper and lower valve rods can be separated from the valve plate through the cooperation of the upper lifting and lowering assembly and the lower lifting and lowering assembly, the valve plate can be replaced without disassembling the butterfly valve as a whole, the maintenance workload is reduced, and the butterfly valve has the excellent convenient maintenance feature. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0022] Figure 2 It is the front view structure schematic drawing of the utility model;

[0023] Figure 3 It is the valve plate installation structure schematic drawing of the utility model;

[0024] Figure 4 It is the upper lifting and lowering assembly structure schematic drawing of the utility model;

[0025] Figure 5 It is the lower lifting and lowering assembly structure schematic drawing of the utility model.

[0026] Reference signs:

[0027] 1, operating arm;2, gear box;3, upper lifting and lowering assembly;301, outer cylinder;302, screw;303, sliding rod;304, push piece;4, lower valve rod;5, valve shell;6, lower lifting and lowering assembly;601, main body frame;602, screw seat;603, seat ring;604, square rod;7, valve plate;8, retaining ring;9, upper valve rod;10, sealing ring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Embodiment one

[0030] As shown in Figures 1-5 The utility model discloses a kind of wear-resistant butterfly valves, including gear box 2, lower valve rod 4, valve shell 5 and valve plate 7, the lower end of valve shell 5 is equipped with lower valve rod 4 by lower lifting and lowering assembly 6, lower lifting and lowering assembly 6 is used to control lower valve rod 4 and is lifted and lowered along valve shell 5 action, the upper end of valve shell 5 is equipped with gear box 2 by upper lifting and lowering assembly 3, upper lifting and lowering assembly 3 is used to control gear box 2 and is lifted and lowered along valve shell 5 action;

[0031] The gear box 2 is rotationally provided with an upper valve rod 9, the upper valve rod 9 is rotationally inserted in the valve housing 5, the valve plate 7 is positioned in the valve housing 5 through mutual insertion between the lower valve rod 4 and the upper valve rod 9, the gear box 2 is rotationally provided with the operating arm 1, the operating arm 1 is meshed with the top end gear of the upper valve rod 9 through the transmission gear provided in the gear box 2, the bottom end of the upper valve rod 9 is designed in a square shape, the square head of the bottom end of the upper valve rod 9 is inserted in the upper end protrusion of the valve plate 7, the operator rotates the operating arm 1 manually, the upper valve rod 9 is rotated under the action of the gear meshing, the upper valve rod 9 drives the valve plate 7 to deflect, thereby the valve opening operation is performed.

[0032] The valve housing 5 is provided with a blocking ring 8 through bolts, the sealing ring 10 is provided between the blocking ring 8 and the valve plate 7, when the valve plate 7 needs to be replaced, the blocking ring 8 is removed, the sealing ring 10 is removed, then the gear box 2 is driven to move up through the upper lifting assembly 3, the gear box 2 drives the upper valve rod 9 to move up in the valve housing 5, so that the upper valve rod 9 is separated from the valve plate 7, then the lower valve rod 4 is driven to move down through the lower lifting assembly 6, so that the lower valve rod 4 is separated from the valve plate 7, the valve plate 7 can be disassembled, after the new valve plate 7 is replaced, the two valve rods are re-inserted into the valve plate 7 to position the valve plate 7 in the valve housing 5.

[0033] Embodiment two

[0034] As Figures 1-5 shown, compared with embodiment one, the wear-resistant butterfly valve further comprises: the upper lifting assembly 3 is composed of an outer cylinder 301, a screw rod 302, a sliding rod 303 and a push piece 304, the bottom end of the outer cylinder 301 is rotationally arranged on the valve housing 5, the screw head of the screw rod 302 is threadedly engaged with the inner wall of the outer cylinder 301, and the top end of the screw rod 302 is arranged on the gear box 2, the bottom end of the sliding rod 303 is arranged on the valve housing 5, the upper end of the sliding rod 303 is slidingly inserted into the gear box 2, and the push piece 304 is arranged on the outer wall of the outer cylinder 301, the upper valve rod 9 penetrates through the outer cylinder 301 and the screw rod 302, when the upper lifting assembly 3 works, the personnel manually rotates the outer cylinder 301 through the push piece 304, the screw rod 302 and the gear box 2 are limited by the sliding rod 303 and cannot be deflected through the threaded engagement action between the outer cylinder 301 and the screw rod 302, that is, the screw rod 302 and the gear box 2 are controlled to perform the lifting action under the principle of the lead screw, that is, the gear box 2 drives the upper valve rod 9 to perform the lifting.

[0035] The lower lifting assembly 6 is composed of a main frame 601, a screw base 602, a seat ring 603 and a square rod 604, the main frame 601 is arranged at the bottom end of the valve housing 5, the seat ring 603 is arranged in the main frame 601, the screw base 602 is rotatably arranged on the seat ring 603, the square rod 604 is arranged at the bottom end of the main frame 601, the upper end of the square rod 604 is inserted into the lower valve rod 4, the lower valve rod 4 is threadedly engaged with the screw base 602, when the lower lifting assembly 6 works, a person manually rotates the screw base 602, the lower valve rod 4 is not deflected under the limitation of the square rod 604, then under the principle of the screw rod, the lower valve rod 4 is controlled to perform the lifting action.

[0036] Further, the upper valve rod and the lower valve rod are both provided with sealing structures at the contact positions with the valve housing 5.

[0037] The above specific embodiments are only several preferred embodiments of the utility model, based on the technical scheme of the utility model and the related enlightenment of the above embodiments, the person skilled in the art can make multiple alternative improvements and combinations to the above specific embodiments.

[0038] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims should be included in the utility model. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A wear-resistant butterfly valve, comprising a gearbox (2), a lower valve stem (4), a valve body (5), and a valve plate (7), characterized in that: The lower end of the valve housing (5) is provided with the lower valve rod (4) through the lower lifting assembly (6). The lower lifting assembly (6) is used to control the lower valve rod (4) to move up and down along the valve housing (5). The upper end of the valve housing (5) is provided with the gearbox (2) through the upper lifting assembly (3). The upper lifting assembly (3) is used to control the gearbox (2) to move up and down along the valve housing (5). The gearbox (2) is rotatably provided with an upper valve stem (9), which is rotatably inserted into the valve housing (5). The valve plate (7) is positioned in the valve housing (5) through mutual insertion with the lower valve stem (4) and the upper valve stem (9).

2. The wear-resistant butterfly valve according to claim 1, characterized in that: The lifting assembly (3) consists of an outer cylinder (301), a screw (302), a slide rod (303), and a paddle (304). The bottom end of the outer cylinder (301) is rotatably mounted on the valve housing (5). The screw head of the screw (302) is threadedly engaged with the inner wall of the outer cylinder (301), and the top end of the screw (302) is mounted on the gearbox (2).

3. The wear-resistant butterfly valve according to claim 2, characterized in that: The bottom end of the slide rod (303) is located on the valve housing (5), the upper end of the slide rod (303) is slidably inserted into the gearbox (2), the paddle (304) is located on the outer wall of the outer cylinder (301), and the upper valve rod (9) passes through the outer cylinder (301) and the screw (302).

4. The wear-resistant butterfly valve according to claim 1, characterized in that: The lower lifting assembly (6) is composed of a main frame (601), a screw seat (602), a seat ring (603) and a square rod (604). The main frame (601) is located at the bottom end of the valve housing (5), the seat ring (603) is located inside the main frame (601), and the screw seat (602) is rotatably mounted on the seat ring (603).

5. The wear-resistant butterfly valve according to claim 4, characterized in that: The square rod (604) is located at the bottom end of the main frame (601), and the upper end of the square rod (604) is connected to the lower valve rod (4). The lower valve rod (4) is threadedly engaged with the screw seat (602).

6. The wear-resistant butterfly valve according to claim 1, characterized in that: An operating arm (1) is rotatably mounted on the gearbox (2), and the operating arm (1) meshes with the top gear teeth of the upper valve stem (9) through a transmission gear inside the gearbox (2).

7. The wear-resistant butterfly valve according to claim 1, characterized in that: The bottom end of the upper valve stem (9) is square, and the square head at the bottom end of the upper valve stem (9) is fitted and inserted into the upper protrusion of the valve plate (7).

8. The wear-resistant butterfly valve according to claim 1, characterized in that: A retaining ring (8) is provided on the valve housing (5) by bolts, and a sealing ring (10) is provided between the retaining ring (8) and the valve plate (7).

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