Ceramic butterfly valve

Abstract

The utility model discloses a ceramic butterfly valve which comprises a valve body, a ceramic valve plate and a valve rod, the ceramic valve plate is installed in the valve body in a rotating mode through the valve rod, a hand wheel disc is arranged above one end, penetrating out of the valve body, of the valve rod, a rotating ring is installed on the outer wall of the valve body in a rotating mode through a slewing bearing, and the rotating ring is connected with a bottom plate of the hand wheel disc through a spring. The outer side of the spring is sleeved with a protective sleeve, and a limiting rod is vertically installed on the outer edge of the rotating ring and penetrates through the top of the hand wheel disc in a sliding mode. The spring support is arranged between the valve rod and the hand wheel disc, the hand wheel disc does not make contact with the valve rod in a normal state, the problem that the valve rod rotates due to the fact that the hand wheel disc is touched by others by mistake is effectively solved, use is safer, meanwhile, the arranged protective sleeve encloses the valve rod and prevents the valve rod from being directly exposed, and the service life of the valve rod is prolonged. The problem of corrosion and aging is effectively solved, the smoothness of rotation and use of the valve rod is guaranteed, and the use safety is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a ceramic butterfly valve. Background Art

[0002] The butterfly valve is a simple regulating valve used for switching low-pressure pipeline media to cut off and throttle. The opening and closing part of the butterfly valve is a disc, which rotates around its own axis in the valve body to achieve the purpose of opening or closing.

[0003] At present, the valve stem control part of the manual butterfly valves on the market is mostly exposed, which can be easily opened by others by mistake, causing the butterfly valve to open unexpectedly. At the same time, when the butterfly valve is used in an outdoor environment, the valve stem control part is easily exposed for a long time, which can accelerate its rust and aging, causing it to get stuck or even unable to rotate during rotation, thereby affecting its safety.

[0004] To this end, we propose a ceramic butterfly valve to solve the above problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a ceramic butterfly valve to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A ceramic butterfly valve comprises a valve body, a ceramic valve plate and a valve stem. The ceramic valve plate is rotatably installed in the valve body through the valve stem. A handwheel disk is provided above the end of the valve stem that passes through the valve body, and a swivel is rotatably installed on the outer wall of the valve body through a slewing bearing. The swivel is connected to the bottom plate of the handwheel disk by a spring to control the elastic expansion and contraction of the handwheel disk relative to the valve stem. A protective sleeve is sleeved on the outer side of the spring. A limit rod is vertically installed on the outer edge of the swivel, and the limit rod slides through the top of the handwheel disk.

[0008] In a further embodiment, a ceramic sealing portion is provided on the inner wall of the valve body and is in close contact with the outer edge of the ceramic valve plate.

[0009] In a further embodiment, three locking grooves are evenly arranged on the top end of the valve stem along the circumferential direction.

[0010] In a further embodiment, an opening and closing block is provided under the bottom plate of the handwheel disc, and three locking blocks corresponding to the locking grooves are evenly provided along the circumferential direction on the lower surface of the opening and closing block.

[0011] In a further embodiment, the protective sleeve is a flexible telescopic sleeve with a tower-shaped structure.

[0012] In a further embodiment, an annular boss is provided on the upper surface of the rotating ring, and the lower end of the protective sleeve is sleeved outside the boss and fixedly connected thereto.

[0013] In a further embodiment, an indicator mark is axially provided on one side of the valve body, and an indicator arrow matching the indicator mark is horizontally provided at the top end of the limit rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model provides a spring support between the valve stem and the handwheel disk, so that the handwheel disk does not touch the valve stem under normal circumstances, thereby effectively avoiding the problem of other people accidentally touching the handwheel disk and causing the valve stem to rotate. It is necessary to press the handwheel disk to connect it with the valve stem before the valve stem can be controlled to rotate, which is safer to use. At the same time, the protective cover is provided to enclose the part of the valve stem protruding from the valve body and the spring to prevent them from being directly exposed, thereby reducing erosion from sunlight and rain, effectively slowing down the problem of rust and aging, ensuring the smooth rotation of the valve stem, and further improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model from the left front;

[0017] Figure 2 This is a schematic diagram of the right rear structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the partial structure of the hand wheel and protective cover installation of the utility model;

[0019] Figure 4 For this utility model Figure 3 Schematic diagram of the structure after removing the protective cover;

[0020] Figure 5 This is a schematic diagram of the disassembled structure of the hand wheel disc and the valve stem connection end of the utility model.

[0021] In the figure: 1. Valve body; 11. Indicator mark; 2. Ceramic valve plate; 3. Valve stem; 31. Lock groove; 4. Ceramic sealing part; 5. Handwheel; 51. Opening and closing block; 52. Locking block; 6. Slewing bearing; 7. Swivel; 71. Boss; 8. Protective cover; 9. Limit rod; 91. Indicator arrow; 10. Spring. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that terms such as "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are used solely to facilitate the description of the present invention and to simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0024] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-4 , a ceramic butterfly valve comprises a valve body 1, a ceramic valve plate 2 and a valve stem 3. The ceramic valve plate 2 is rotatably installed in the valve body 1 through the valve stem 3. A handwheel disc 5 is provided above the end of the valve stem 3 passing through the outside of the valve body 1, and a swivel ring 7 is rotatably installed on the outer wall of the valve body 1 through a slewing bearing 6. The swivel ring 7 is coaxial with the handwheel disc 5. The swivel ring 7 is connected to the bottom plate of the handwheel disc 5 through a spring 10. The spring 10 supports the handwheel disc 5 so that the handwheel disc 5 elastically expands and contracts relative to the valve stem 3. Under normal circumstances, the handwheel disc 5 does not contact the valve stem 3. At this time, if the handwheel disc 5 is accidentally touched, the handwheel disc 5 drives the spring 10 and the swivel ring 7 to rotate relative to the slewing bearing 6, but will not drive the valve stem 3 to rotate, thereby enhancing the anti-accidental touch effect.

[0026] See also Figure 1 In order to improve the sealing and wear resistance between the ceramic valve plate 2 and the valve body 1, a ceramic sealing part 4 is provided on the inner wall of the valve body 1, which fits tightly with the outer edge of the ceramic valve plate 2. The ceramic sealing part 4 is more wear-resistant.

[0027] See also Figure 1-5 Considering that when supported only by the spring 10, the bending of the spring 10 may easily cause the handwheel disc 5 to tilt, affecting its stability, a limit rod 9 is vertically installed on the outer edge of the rotating ring 7, and the top end of the limit rod 9 slides through the top of the handwheel disc 5, thereby limiting the handwheel disc 5, while not affecting the handwheel disc 5 from pressing downward to connect with the valve stem 3.

[0028] See also Figure 5 In order to facilitate the connection between the valve stem 3 and the handwheel disk 5, three locking grooves 31 are evenly opened at the top of the valve stem 3 along the circumferential direction, an opening and closing block 51 is provided under the bottom plate of the handwheel disk 5, and three locking blocks 52 corresponding to the locking grooves 31 are evenly provided on the lower surface of the opening and closing block 51 along the circumferential direction. After the locking blocks 52 are correspondingly inserted into the locking grooves 31, the valve stem 3 can be driven to rotate by the handwheel disk 5.

[0029] See also Figure 3-5 Taking into account that the position of the handwheel disc 5 changes after accidentally touching the handwheel disc 5, in order to facilitate the quick alignment and connection of the handwheel disc 5 and the valve stem 3, an indicator mark 11 is provided on one side of the valve body 1 along the axial direction, and an indicator arrow 91 matching the indicator mark 11 is provided horizontally at the top of the limit rod 9, so that when the indicator arrow 91 and the indicator mark 11 are on the same horizontal line, the position can be aligned. At this time, pressing the handwheel disc 5 can insert the locking block 52 into the corresponding locking groove 31.

[0030] See also Figure 1-4 In order to protect the valve stem 3 and the spring 10 and reduce erosion by sunlight and rain, a protective sleeve 8 is sleeved on the outside of the spring 10. The upper end of the protective sleeve 8 is connected to the bottom plate of the handwheel disk 5, and the lower end of the protective sleeve 8 is connected to the swivel 7 so that it can rotate with the swivel 7. The protective sleeve 8 adopts a flexible telescopic sleeve with a tower structure, which does not affect the expansion and contraction of the spring 10.

[0031] Furthermore, an annular boss 71 is provided on the upper surface of the swivel 7, and the lower end of the protective sleeve 8 is sleeved outside the boss 71 and fixedly connected thereto, and a limit is formed by the annular boss 71 to prevent rainwater from entering the protective sleeve 8 from outside the swivel 7.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0033] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A ceramic butterfly valve, comprising a valve body (1), a ceramic valve plate (2) and a valve stem (3), wherein the ceramic valve plate (2) is rotatably mounted in the valve body (1) via the valve stem (3), and is characterized in that: A hand wheel disc (5) is provided above one end of the valve stem (3) passing through the outside of the valve body (1), and a swivel ring (7) is rotatably installed on the outer wall of the valve body (1) through a slewing bearing (6). The swivel ring (7) is connected to the bottom plate of the hand wheel disc (5) through a spring (10) to control the elastic expansion and contraction of the hand wheel disc (5) relative to the valve stem (3). A protective sleeve (8) is sleeved on the outer side of the spring (10). A limit rod (9) is vertically installed on the outer edge of the swivel ring (7), and the limit rod (9) slides through the top of the hand wheel disc (5).

2. A ceramic butterfly valve according to claim 1, characterized in that: A ceramic sealing portion (4) is provided on the inner wall of the valve body (1) and is tightly fitted with the outer edge of the ceramic valve plate (2).

3. The ceramic butterfly valve according to claim 1, characterized in that: The top end of the valve stem (3) is evenly provided with three locking grooves (31) along the circumferential direction.

4. A ceramic butterfly valve according to claim 3, characterized in that: An opening and closing block (51) is provided under the bottom plate of the hand wheel disc (5), and three locking blocks (52) corresponding to the locking grooves (31) are evenly provided on the lower surface of the opening and closing block (51) along the circumferential direction.

5. The ceramic butterfly valve according to claim 1, characterized in that: The protective sleeve (8) is a flexible telescopic sleeve with a tower-shaped structure.

6. The ceramic butterfly valve according to claim 1, characterized in that: An annular boss (71) is provided on the upper surface of the rotating ring (7), and the lower end of the protective sleeve (8) is sleeved outside the boss (71) and fixedly connected thereto.

7. The ceramic butterfly valve according to claim 1, characterized in that: An indicator mark (11) is provided axially on one side of the valve body (1), and an indicator arrow (91) matching the indicator mark (11) is provided horizontally on the top end of the limit rod (9).

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