Self-locking manual butterfly valve

Abstract

The utility model relates to the technical field of valves, and discloses a self-locking type manual butterfly valve which comprises a shell and a butterfly plate rotationally connected in the shell, and is characterized in that a pressure relief assembly is arranged on the butterfly plate and comprises a pressure relief hole formed in the butterfly plate, a pressure relief plate used for shielding the pressure relief hole and a cylinder integrally formed on the butterfly plate; the pressure relief plate is slidably connected to one side of the butterfly plate, a pull rod is slidably connected into the cylinder, the bottom end of the pull rod penetrates through the shell, and a pull handle is fixed to the bottom end of the pull rod. The pressure relief assembly is arranged, pipeline pressure is released through the pressure relief assembly, then the valve is opened easily by rotating the handle, the pressure relief assembly is simple in structure, easy to achieve and easy and labor-saving to use, meanwhile, the nickel layer arranged on the butterfly plate can be used for corrosion prevention, and the purpose of further corrosion prevention is achieved through the sacrificial anode. And two anti-corrosion modes are combined for use, so that the butterfly plate is not easy to corrode and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely is a self locking type manual butterfly valve. BACKGROUND

[0002] The butterfly valve is also called a flap valve, and is a simple structure regulating valve, which can be used for on-off control of low-pressure pipeline medium, and is a valve in which a closing element (valve disc or butterfly plate) is a disc, which rotates about a valve shaft to achieve opening and closing. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. In the pipeline, it mainly plays a role of cutting off and throttling. The butterfly valve has a disc-shaped butterfly plate, which rotates about its own axis in the valve body, thereby achieving the purpose of opening, closing or adjusting.

[0003] When the pressure in the pipeline is large, the opening and closing of the butterfly valve will be more difficult, and the existing butterfly valve cannot relieve the pressure inside the pipeline. When it is necessary to adjust the opening degree of the butterfly valve, the user needs to force the handle to rotate the butterfly plate of the butterfly valve, which is very inconvenient. Therefore, a self-locking type manual butterfly valve with simple structure, easy to realize and capable of relieving the pressure inside the pipeline is provided. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a self-locking type manual butterfly valve to solve the problems in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A self-locking type manual butterfly valve, comprising a shell and a butterfly plate rotatably connected in the shell, characterized in that a pressure relief assembly is arranged on the butterfly plate, the pressure relief assembly comprises a pressure relief hole arranged on the butterfly plate, a pressure relief plate for shielding the pressure relief hole, and a cylinder integrally formed on the butterfly plate, the pressure relief plate is slidably connected to one side of the butterfly plate, a pull rod is slidably connected in the cylinder, the bottom end of the pull rod penetrates the shell, and a pull handle is fixed to the bottom end of the pull rod, the pull rod and the pressure relief plate are fixedly connected through a support, the support and the cylinder are slidably connected, a sliding plate is fixed to the pull rod, the sliding plate is slidably connected in the cylinder, a return spring is sleeved on the pull rod, and the two ends of the return spring are fixedly connected with the sliding plate and the inner wall of the cylinder respectively.

[0007] As a further scheme of the utility model, an anode sacrificial layer is arranged on each side of the butterfly plate, and a nickel layer is electroplated on the outer side of each of the two anode sacrificial layers.

[0008] As a further scheme of the utility model: the pressure relief plate includes an arc-shaped plate and a water baffle, the arc-shaped plate and the water baffle are welded and fixed, the shape of the arc-shaped plate is adapted to the shape of the cylinder, and the arc-shaped plate is slidably connected to one side of the cylinder; the water baffle is provided in a corresponding and equal number with the pressure relief holes; and a sealing gasket is fixed to one side of the water baffle corresponding to the pressure relief holes.

[0009] As a further scheme of the utility model: the top of the shell is integrally formed with a shaft sleeve, a valve rod is rotatably connected in the shaft sleeve, the bottom end of the valve rod penetrates the inner wall of the shell and is fixedly connected to one end of the pivot shaft of the butterfly plate, an end cover is fixed to the top end of the shaft sleeve, a gear is fixed to the top of the end cover, the top end of the valve rod extends above the gear, and the valve rod is rotatably connected with the end cover and the gear, and a handle is fixed to one side of the top end of the valve rod.

[0010] As a further scheme of the utility model: a press handle is hingedly connected below the handle, a torsion spring is arranged at the hinge, a tooth is arranged at one end of the press handle close to the gear, and the tooth is clamped in the gear slot of the gear.

[0011] As a further scheme of the utility model: a sealing ring is arranged at the joint between the shell and the butterfly plate.

[0012] Compared with the prior art, the utility model has the advantages as follows:

[0013] 1. In the utility model, the rear end of the press handle is held, the rear end of the press handle is close to the handle side, at this time, the tooth at the front end of the press handle is separated from the gear slot, the handle is restored to a free state, the handle can be rotated at this time, the handle drives the valve rod to rotate, the valve rod is connected with the butterfly plate, the valve rod drives the butterfly plate to rotate synchronously when the valve rod rotates, thereby realizing the opening and closing of the butterfly valve; when the press handle is released, the press handle is reset under the action of the torsion spring, the tooth at the front end of the press handle is clamped into the gear slot again, at this time, the press handle is locked, the handle connected with the press handle is also locked, the handle cannot be rotated, the valve rod, the butterfly plate and the like connected with the handle also cannot be rotated, and the position of the butterfly plate is locked, thereby realizing the self-locking function of the butterfly valve.

[0014] 2. In the utility model, the chemical properties of nickel are stable, the nickel layer can be used for corrosion prevention, the anode sacrificial layer is made of magnesium, aluminum, zinc and other anode sacrificial materials, further corrosion prevention is achieved through the sacrificial anode, the two corrosion prevention modes are combined for use, the butterfly plate is not easy to be corroded, and the service life is long.

[0015] 3、The utility model discloses, set up pressure relief subassembly, when the water pressure in pipeline is bigger, it is more difficult to open the valve through rotating handle, can release the part water flow in the pipeline through pressure relief subassembly at this moment, reduce the pipeline pressure, then go to rotate handle and open the valve again can be more relaxed, specifically, through the pull handle of pulling down and drive the synchronous downward movement of pull rod, when pull rod goes down, the pressure relief plate connected with pull rod goes down simultaneously, the pressure relief hole that the pressure relief plate blocks is opened at this time, the water flow of one side in the pipeline is arranged to the other side of the pipeline through the pressure relief hole, when the water pressure on both sides of the pipeline is similar, then go to rotate handle and can open the valve easily, the pressure relief subassembly in the device simple structure, easy to realize, and it is easy to use and save the effort. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for those skilled in the art, under the premise of not creating the labor, can also obtain other drawings according to these drawings.

[0017] Figure 1 It is the structural schematic diagram of the utility model.

[0018] Figure 2 It is the overhead structure schematic diagram of the utility model in the butterfly plate and cylinder.

[0019] Figure 3 It is Figure 2 The enlarged view of A in the middle.

[0020] Figure 4 It is the cross section structure schematic diagram of the utility model in the butterfly plate.

[0021] Mark annotation: 1-housing, 2-seal ring, 3-butterfly plate, 31-anode sacrificial layer, 32-nickel layer, 4-cylinder, 5-pressure relief hole, 6-pressure relief plate, 61-sealing pad, 62-arc plate, 63-water baffle, 7-shaft sleeve, 8-end cover, 9-gear, 10-valve rod, 11-handle, 12-press handle, 13-claw, 14-pull handle, 15-sliding plate, 16-return spring, 17-pull rod, 18-bracket. DETAILED DESCRIPTION

[0022] The following embodiments will be described in detail in conjunction with the drawings, in the drawings or the description, similar or identical parts use the same reference signs, and in practical application, the shape, thickness or height of each component can be enlarged or reduced. The embodiments listed in the utility model are only used to illustrate the utility model, and are not used to limit the scope of the utility model. Any obvious modification or change made to the utility model does not deviate from the spirit and scope of the utility model.

[0023] Embodiment 1

[0024] Please refer to Figure 1 In the utility model, a self-locking manual butterfly valve is provided, which comprises a shell 1 and a butterfly plate 3 rotatably connected in the shell 1, a sealing ring 2 is arranged at the joint of the shell 1 and the butterfly plate 3, an axle sleeve 7 is integrally formed at the top of the shell 1, a valve rod 10 is rotatably connected in the axle sleeve 7, the bottom end of the valve rod 10 penetrates the inner wall of the shell 1 and is fixedly connected with one end of the rotating shaft of the butterfly plate 3, an end cover 8 is fixedly connected with the top end of the axle sleeve 7, a gear 9 is fixedly connected with the top of the end cover 8, the top end of the valve rod 10 extends above the gear 9 and is rotatably connected with the end cover 8 and the gear 9, a handle 11 is fixedly connected with one side of the top end of the valve rod 10, a pressing handle 12 is hingedly connected below the handle 11 and a torsion spring is arranged at the hinge, a clamping tooth 13 is arranged on the end of the pressing handle 12 close to the gear 9 and is clamped in the gear slot of the gear 9, the clamping tooth 13 of the front end of the pressing handle 12 can be separated from the gear slot of the gear 9 by holding the rear end of the pressing handle 12, at this time, the handle 11 can be moved and the valve can be opened and closed, after the pressing handle 12 is released, the pressing handle 12 is reset under the action of the torsion spring, the clamping tooth 13 is reinserted into the gear slot of the gear 9, the handle 11 is locked, and the valve rod 10 and the butterfly plate 3 connected with the handle are synchronously locked, so that the self-locking of the valve is realized.

[0025] Please refer to Figure 1 、 Figure 2 、 Figure 3 A pressure relief assembly is arranged on the butterfly plate 3, the pressure relief assembly comprises a pressure relief hole 5 arranged on the butterfly plate 3, a pressure relief plate 6 used for shielding the pressure relief hole 5 and a cylinder 4 integrally formed on the butterfly plate 3, in the embodiment, the pressure relief hole 5 is arranged in two, which are respectively arranged on the left side and the right side of the butterfly plate 3, the pressure relief plate 6 is arranged on one side of the pressure relief hole 5 and is slidably connected on one side of the butterfly plate 3, a pull rod 17 is slidably connected in the cylinder 4, the bottom end of the pull rod 17 penetrates the shell 1 and a pull handle 14 is fixedly connected with the bottom end of the pull rod 17, the pull rod 17 is movably connected with the shell 1 and can be rotated and slid, the pull rod 17 is fixedly connected with the pressure relief plate 6 through a support 18, the support 18 is slidably connected with the cylinder 4, a sliding plate 15 is fixedly connected with the pull rod 17 and is slidably connected in the cylinder 4, a reset spring 16 is sleeved on the pull rod 17 and the two ends of the reset spring 16 are fixedly connected with the sliding plate 15 and the inner wall of the cylinder 4.

[0026] Please refer to Figure 2 The pressure relief plate 6 comprises an arc-shaped plate 62 and a water baffle 63, in the embodiment, the water baffle 63 is arranged in two, the two water baffles 63 are fixedly welded on the two sides of the arc-shaped plate 62, the shape of the arc-shaped plate 62 is matched with the shape of the cylinder 4, and the arc-shaped plate 62 is slidably connected on one side of the cylinder 4, the water baffle 63 is fixedly connected with a sealing gasket 61 on the side corresponding to the pressure relief hole 5.

[0027] Embodiment 2

[0028] Based on the embodiment 1, please refer to Figure 4 The two sides of the butterfly plate 3 are provided with anodic sacrificial layers 31, and the outer sides of the two anodic sacrificial layers 31 are plated with nickel layers 32. The nickel has stable chemical properties, and the nickel layer can be used for corrosion prevention. The anodic sacrificial layer 31 is made of magnesium, aluminum, zinc or other anodic sacrificial materials, and further corrosion prevention is achieved through the sacrificial anode. The two corrosion prevention methods are combined, so that the butterfly plate is not easy to be corroded and has a long service life.

[0029] Working principle:

[0030] When in use, the rear end of the pressing handle 12 is held, and the rear end of the pressing handle is close to the handle 11. At this time, the clamping teeth 13 at the front end of the pressing handle are separated from the tooth grooves of the gear 9. The handle 11 is restored to a free state, and the handle 11 can be rotated at this time. The handle 11 can be rotated by rotating the handle 11 to drive the valve rod 10 to rotate. The valve rod is connected with the butterfly plate 3. When the valve rod rotates, the butterfly plate will rotate synchronously, so as to realize the opening and closing of the butterfly valve. When the pressing handle 12 is released, the pressing handle is reset under the action of the torsion spring. The clamping teeth 13 at the front end of the pressing handle are re-clamped into the tooth grooves of the gear 9. At this time, the pressing handle is locked, and the handle 11 connected with the pressing handle is also locked. The handle 11 cannot be rotated again. The valve rod, the butterfly plate and the like connected with the handle cannot be rotated either. The position of the butterfly plate 3 is locked, so as to realize the self-locking function of the butterfly valve.

[0031] The pressure relief assembly is arranged in the device. When the water pressure in the pipeline is large, it is more difficult to open the valve by rotating the handle. At this time, part of the water flow in the pipeline can be discharged through the pressure relief assembly to reduce the pipeline pressure, and then the valve can be easily opened by rotating the handle. The specific pressure relief process is as follows:

[0032] By pulling down the handle 14 to drive the pull rod 17 to move downward synchronously, the pull rod moves downward, and the pressure relief plate 6 connected with the pull rod moves downward synchronously. The pressure relief hole 5 blocked by the pressure relief plate is opened at this time. The water flow on one side of the pipeline is discharged to the other side of the pipeline through the pressure relief hole 5. When the water pressure on both sides of the pipeline is similar, the valve can be easily opened by rotating the handle 11. The pressure relief assembly in the device has a simple structure and is easy to realize, and is easy to use and labor-saving.

[0033] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and 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 rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0034] Furthermore, it should be understood that although the specification is described in terms of embodiments, the specification is not to be limited to only these described embodiments. The specification is intended to include each individual embodiment as a separate embodiment as well as any combination of individual embodiments.

Claims

1. A self-locking manual butterfly valve comprising a housing (1) and a butterfly plate (3) rotatably connected in the housing (1), characterized in that, The butterfly plate (3) is provided with a pressure relief assembly, the pressure relief assembly comprises a pressure relief hole (5) opened on the butterfly plate (3), a pressure relief plate (6) used for shielding the pressure relief hole (5) and a cylinder (4) integrally formed on the butterfly plate (3), the pressure relief plate (6) is slidingly connected on one side of the butterfly plate (3), the cylinder (4) is slidingly connected with a pull rod (17) inside, the bottom end of the pull rod (17) penetrates the shell (1), and the bottom end of the pull rod (17) is fixed with a pull handle (14); The pull rod (17) and the pressure relief plate (6) are fixedly connected through a support (18), the support (18) and the cylinder (4) are slidingly connected, the pull rod (17) is fixedly connected with a sliding plate (15), the sliding plate (15) is slidingly connected in the cylinder (4), and the pull rod (17) is sleeved with a reset spring (16), and the two ends of the reset spring (16) are fixedly connected with the sliding plate (15) and the inner wall of the cylinder (4) respectively.

2. The self-locking manual butterfly valve according to claim 1, characterized in that The two sides of the butterfly plate (3) are provided with an anode sacrificial layer (31), and the outer sides of the two anode sacrificial layers (31) are electroplated with a nickel layer (32).

3. The self-locking manual butterfly valve according to claim 2, characterized in that The pressure relief plate (6) comprises an arc-shaped plate (62) and a water baffle (63), the arc-shaped plate (62) and the water baffle (63) are welded and fixed, the shape of the arc-shaped plate (62) is matched with the shape of the cylinder (4), the arc-shaped plate (62) is slidingly connected on one side of the cylinder (4), the water baffles (63) are arranged in the same number and correspondingly arranged with the pressure relief holes (5), and the water baffles (63) are fixed with sealing pads (61) on one side corresponding to the pressure relief holes (5).

4. The self-locking manual butterfly valve according to claim 1 or 3, characterized in that The top of the shell (1) is integrally formed with a shaft sleeve (7), the shaft sleeve (7) is rotatably connected with a valve rod (10) inside, the bottom end of the valve rod (10) penetrates the inner wall of the shell (1) and is fixedly connected with one end of a rotating shaft of the butterfly plate (3), the top end of the shaft sleeve (7) is fixedly connected with an end cover (8), the top of the end cover (8) is fixedly connected with a gear (9), the top end of the valve rod (10) extends above the gear (9), and the valve rod (10) is rotatably connected with the end cover (8) and the gear (9), and one side of the top end of the valve rod (10) is fixedly connected with a handle (11).

5. The self-locking manual butterfly valve according to claim 4, characterized in that A press handle (12) is hinged below the handle (11), and a torsion spring is arranged at the hinge, one end of the press handle (12) close to the gear (9) is provided with a toothed portion (13), and the toothed portion (13) is clamped in a tooth groove of the gear (9).

6. The self-locking manual butterfly valve according to claim 1, wherein A sealing ring (2) is arranged at the joint of the shell (1) and the butterfly plate (3).

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