Limiting butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a limiting butterfly valve which comprises a valve body, annular grooves used for installation are formed in the surfaces of the two side ends and the surface of the top end of the periphery of the valve body, vertical holes used for connection are formed between the two annular grooves, and the number of the vertical holes is two. A heating coil capable of being used for heating is clamped on the inner side of the annular groove; in cold weather, the heating coil in the annular groove in the inner side of the valve body of the butterfly valve can operate, a large amount of heat can be conveniently generated through operation of the heating coil, the heat can be conveniently conducted to the valve body at the moment, unfreezing or freezing prevention is facilitated, and the butterfly valve can continuously, stably and safely operate.

Description

Technical Field

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

[0002] A butterfly valve, also called a flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. A butterfly valve is a valve whose closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to open and close. However, in cold weather, the valve stem and valve plate inside the butterfly valve are very likely to freeze and get stuck, which can easily affect the operation of the butterfly valve. For this reason, we propose a limited position butterfly valve. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a limit butterfly valve.

[0004] The technical solution adopted by the utility model to solve the technical problem is a limited position butterfly valve, comprising a valve body, both side end surfaces and the top end surface of the valve body are provided with annular grooves for installation, vertical holes for connection are provided between two groups of the annular grooves, and there are two groups of vertical holes, and a heating coil for heating is clamped inside the annular groove;

[0005] A ring cover for sealing is screwed on the inner side of the ring groove, and a disc cover for sealing is assembled on the top surface of the valve body by bolts. A ring groove for connection is provided on a side of the disc cover close to the valve body, and there are two groups of ring grooves. A ring that fits and connects with the ring groove is integrally constructed on one side of the disc cover opposite to the valve body, and a rubber pad for leak prevention is bonded to one side of the ring close to the ring groove.

[0006] By adopting the above technical solution, in cold weather, the heating coil in the inner ring groove of the butterfly valve body can be operated, and the heating coil can generate a large amount of heat, which can be easily transferred to the valve body, thereby thawing or preventing freezing, so that the butterfly valve can operate continuously, stably and safely;

[0007] When it is necessary to maintain the heating coil inside the valve body, the ring cover in the ring groove outside the valve body can be rotated so that the ring cover can be screwed and separated from the ring groove, and then the disc cover installed on the top of the valve body with bolts can be removed, so that the heating coil inside the ring groove can be removed and maintained, or it can be conveniently replaced. When the maintenance is completed, the ring cover and the disc cover can be installed again. At the same time, the ring and the ring groove between the disc cover and the valve body are fitted and connected with each other, which is convenient to improve the tightness of the disc cover after installation, so that the heating coil can operate stably and smoothly.

[0008] Specifically, a heat-insulating ring that is closely connected to the heating coil is inserted into the inner side of the ring groove.

[0009] By adopting the above technical solution, the heat insulation ring can easily block the heat, so that the heat can be conducted into the inner side of the valve body, which is convenient for reducing the volatilization of heat.

[0010] Specifically, a leak-proof rubber ring is bonded to one side of the ring cover close to the ring groove.

[0011] By adopting the above technical solution, the rubber ring can improve the tightness between the ring cover and the ring groove after connection.

[0012] Specifically, the outer peripheral surface of the ring cover is provided with grooves that can be used for rotation, and there are multiple groups of grooves.

[0013] By adopting the above technical solution, the groove makes it more convenient and quick to disassemble and assemble the ring cover.

[0014] Specifically, a straight hole for wiring is provided on the top surface of the disk cover.

[0015] By adopting the above technical solution, the straight hole makes it convenient for the heating coil to be connected to the external circuit, so that the heating coil can operate.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The technical solution of the present application, through the design of the ring groove and the heating coil, can enable the heating coil in the inner ring groove of the butterfly valve body to operate in cold weather, and the operation of the heating coil can generate a large amount of heat, which can be easily transferred to the valve body, thereby facilitating thawing or antifreeze, so that the butterfly valve can operate continuously, stably and safely.

[0018] 2. The technical solution of the present application, through the design of the ring cover, disc cover, ring groove, ring ring and rubber pad, can rotate the ring cover in the ring groove on the outside of the valve body when it is necessary to maintain the heating coil on the inside of the valve body, so that the ring cover can be screwed and separated from the ring groove, and then the disc cover installed on the top of the valve body with bolts can be removed, so that the heating coil on the inside of the ring groove can be disassembled and maintained, or it can be convenient to replace it. After the maintenance is completed, the ring cover and the disc cover can continue to be installed. At the same time, the ring ring and the ring groove between the disc cover and the valve body are fitted and connected with each other, which is convenient to improve the tightness of the disc cover after installation, so that the heating coil can operate stably and smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is an axonometric drawing of the utility model;

[0021] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the overall mechanism of the utility model at part A;

[0023] In the figure: 1, valve body; 2, ring groove; 3, heating coil; 4, ring cover; 5, disc cover; 6, ring groove; 7, ring; 8, rubber pad; 9, insulation ring; 10, rubber ring; 11, vertical hole; 12, straight hole; 13, groove. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] See also Figure 1-3 The utility model embodiment provides a technical solution: a limited position butterfly valve, including a valve body 1, both side end surfaces and the top surface of the outer periphery of the valve body 1 are provided with annular grooves 2 for installation, vertical holes 11 for connection are provided between the two groups of annular grooves 2, and there are two groups of vertical holes 11, a heating coil 3 for heating is clamped on the inner side of the annular groove 2; a ring cover 4 for sealing is screwed on the inner side of the annular groove 2, and a disc cover 5 for sealing is assembled on the top surface of the valve body 1 by bolts, a ring groove 6 for connection is provided on a side of the disc cover 5 close to the valve body 1, and there are two groups of ring grooves 6, a ring 7 that fits and is connected to the ring groove 6 is integrally constructed on the side opposite to the valve body 1, and a rubber pad 8 for leak prevention is bonded to the side of the ring 7 close to the ring groove 6.

[0026] When in use, in cold weather, the heating coil 3 in the inner ring groove 2 of the butterfly valve body 1 can be operated, and the heating coil 3 can generate a large amount of heat, which can be easily transferred to the valve body 1, thereby thawing or antifreezing, so that the butterfly valve can operate continuously, stably and safely;

[0027] When it is necessary to maintain the heating coil 3 inside the valve body 1, the ring cover 4 in the annular groove 2 outside the valve body 1 can be rotated so that the ring cover 4 can be screwed and separated from the annular groove 2, and then the disc cover 5 installed on the top of the valve body 1 with bolts can be removed, so that the heating coil 3 inside the annular groove 2 can be disassembled and maintained, or it can be conveniently replaced. When the maintenance is completed, the ring cover 4 and the disc cover 5 can be installed again, and at the same time, the ring ring 7 and the ring groove 6 between the disc cover 5 and the valve body 1 are fitted and connected with each other, so as to improve the tightness of the disc cover 5 after installation, so that the heating coil 3 can operate stably and smoothly.

[0028] like Figure 2 and Figure 3 As shown, a heat-insulating ring 9 which is closely connected to the heating coil 3 is inserted into the inner side of the annular groove 2 .

[0029] When in use, the heat insulating ring 9 is convenient for isolating the heat so that the heat can be conducted into the inner side of the valve body 1, thereby reducing the volatilization of heat.

[0030] like Figure 2 As shown, a rubber ring 10 for preventing leakage is bonded to one side of the ring cover 4 close to the ring groove 2 .

[0031] When in use, the rubber ring 10 is convenient for improving the tightness of the connection between the ring cover 4 and the ring groove 2 .

[0032] like Figure 1 As shown, the outer circumferential surface of the ring cover 4 is provided with grooves 13 which can be used for rotation, and there are multiple groups of grooves 13.

[0033] When in use, the groove 13 makes the ring cover 4 easier to assemble and disassemble.

[0034] like Figure 1 and Figure 2 As shown, a straight hole 12 for wiring is provided on the top surface of the disk cover 5.

[0035] When in use, the straight hole 12 allows the heating coil 3 to be easily connected to an external circuit, so that the heating coil 3 can operate.

[0036] The working principle and use process of the utility model are as follows: when in use, firstly, the corresponding structural components are installed in a suitable position. In cold weather, the heating coil 3 in the annular groove 2 inside the butterfly valve body 1 can be operated, and the heating coil 3 can generate a large amount of heat when it operates. At this time, the heat is conveniently transmitted to the valve body 1, so as to facilitate thawing or antifreezing, so that the butterfly valve can operate continuously, stably and safely. When the heating coil 3 inside the valve body 1 needs to be maintained, the ring cover 4 in the annular groove 2 outside the valve body 1 can be rotated so that the ring cover 4 can be screwed and separated from the annular groove 2, and then the disc cover 5 installed on the top of the valve body 1 with bolts can be disassembled, so that the heating coil 3 inside the annular groove 2 can be disassembled and maintained, or it can be convenient to replace it. When the maintenance is completed, the ring cover 4 and the disc cover 5 can continue to be installed, and at the same time, the ring 7 and the ring groove 6 between the disc cover 5 and the valve body 1 are mutually fitted and connected, so as to improve the tightness of the disc cover 5 after installation, so that the heating coil 3 can operate stably and smoothly.

[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A limit butterfly valve, characterized in that: The valve body (1) comprises a valve body, both side end surfaces and the top end surface of the outer periphery of the valve body (1) are provided with annular grooves (2) for installation, a vertical hole (11) for connection is provided between two groups of the annular grooves (2), and there are two groups of the vertical holes (11), and a heating coil (3) for heating is clamped inside the annular groove (2); A ring cover (4) for sealing is screwed on the inner side of the ring groove (2), and a disc cover (5) for sealing is assembled on the top surface of the valve body (1) by means of bolts. A ring groove (6) for connection is provided on the side of the disc cover (5) close to the valve body (1), and the ring groove (6) has two groups. A ring (7) for fitting and connecting with the ring groove (6) is integrally formed on the side of the disc cover (5) opposite to the valve body (1), and a rubber pad (8) for leak prevention is bonded on the side of the ring (7) close to the ring groove (6).

2. A position limiting butterfly valve according to claim 1, characterized in that: A heat-insulating ring (9) which is closely connected to the heating coil (3) is inserted into the inner side of the annular groove (2).

3. A position limiting butterfly valve according to claim 1, characterized in that: A rubber ring (10) for preventing leakage is bonded to one side of the ring cover (4) close to the ring groove (2).

4. A position limiting butterfly valve according to claim 1, characterized in that: The outer peripheral surface of the ring cover (4) is provided with grooves (13) that can be used for rotation, and there are multiple groups of grooves (13).

5. A position-limited butterfly valve according to claim 1, characterized in that: The top surface of the disk cover (5) is provided with a straight hole (12) for wiring.

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