CN215521995U

CN215521995U - Butterfly valve for high temperature

Info

Publication number: CN215521995U
Application number: CN202121718822.5U
Authority: CN
Inventors: 梁立明; 王宝; 任君明; 仇帅; 杨君玲; 张海东; 左朋朋
Original assignee: Shijiazhuang No1 Valve Factory Co ltd
Current assignee: Shijiazhuang Xianchu Nuclear Equipment Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-14
Anticipated expiration: 2031-07-27

Abstract

The utility model provides a butterfly valve for high temperature, which comprises a valve rod; the valve rod penetrates through the valve body assembly and is rotationally connected with the valve body assembly; the valve plate assembly is positioned in the valve body assembly, and the length of the valve plate assembly is the same as the diameter of the inner circle of the valve body assembly; the central position of the valve rod is fixedly connected with the valve plate assembly through the taper pin assembly, and the valve plate assembly is arranged on the valve rod in parallel; the limiting assembly is arranged on the inner side of the cylinder of the valve body assembly; the output end of the actuating mechanism is fixedly connected with an expansion sleeve fixed at one end of the valve rod, and the other end of the valve rod is sealed through an end cover. The utility model effectively solves the problem that graphite is compacted all the time, and prevents the hidden trouble of high-temperature medium leakage; the whole structure is convenient to install, the valve rod is accurately positioned, and the assembly is convenient; a special expansion sleeve structure is adopted. The overall structure is more harmonious in layout, and the practicability is greatly improved. The valve rod middle part location, dish spring compact structure that this butterfly valve adopted are novel design theory, and simultaneously, the valve is equipped with the cover structure that expands, has obtained the wide application.

Description

Butterfly valve for high temperature

Technical Field

The utility model belongs to the technical field of high-temperature butterfly valves, and relates to a butterfly valve for high temperature. The utility model belongs to the technical field of high-temperature butterfly valves, and relates to a butterfly valve for high temperature.

Background

The high-temperature butterfly valve is used as a regulating or cutting device of high-temperature gas medium flow, is a component for realizing the on-off and flow control of a pipeline system, and has been widely applied as a control regulating valve in high-temperature gas pipelines and blast furnace air distribution in the industries of petroleum, petrifaction, nuclear power, metallurgy and the like. The medium generally contains harmful gas, and once the medium leaks, the medium can cause great harm to the environment. The existing high-temperature butterfly valve has the following defects:

1) the graphite has no compaction/compaction device, so that high-temperature gas can move back and forth through a gap between the graphite/shaft sleeve and the valve rod, the phenomena of valve rod adhesion and blockage are caused at a high probability, and a high-temperature medium cannot be effectively sealed in a valve body cavity.

2) An assembling worker needs to adjust the position of the valve rod and the gap between the valve rod and the adjusting pad on site by adjusting the thickness of the adjusting pad; the thickness of the adjusting pad is not easy to measure, process and control tolerance, so that the size of the gap is difficult to control accurately, the valve rod is increased in torque due to the excessively small gap, the actuating mechanism is overloaded, and the valve plate (valve body) cannot be opened or closed; meanwhile, the requirement on the skill of an assembler is high, and the installation efficiency is low.

3) The actuating mechanism and the valve rod are connected/torque-transmitting through a double key (90 degrees), technicians need to be extremely familiar with the steering and the structure of the actuating mechanism, otherwise, the direction is incorrect when a key slot is formed on the valve rod; the key groove machining process is complicated, and the machining time is long; the mounting/dismounting is very inconvenient, is easy to collide or block, and directly damages the shaft and the hub if the mounting/dismounting is improper, thereby causing economic loss.

Disclosure of Invention

In order to solve the problems, the utility model provides the butterfly valve for high temperature, which prevents high temperature medium from leaking, has a convenient whole structure, is harmonious in layout and has high practicability.

In order to achieve at least one of the above purposes, the technical scheme adopted by the utility model is as follows:

the utility model provides a butterfly valve for high temperature, which comprises a valve rod; the valve rod penetrates through the valve body assembly and is rotationally connected with the valve body assembly; the valve plate assembly is positioned in the valve body assembly, and the length of the valve plate assembly is the same as the diameter of the inner circle of the valve body assembly; the central position of the valve rod is fixedly connected with the valve plate assembly through the taper pin assembly, and the valve plate assembly is arranged on the valve rod in parallel; the limiting assembly is arranged on the inner side of the cylinder of the valve body assembly; the output end of the actuating mechanism is fixedly connected with an expansion sleeve fixed at one end of the valve rod, and the other end of the valve rod is sealed by an end cover; the part of the valve rod extending out of the valve body assembly is rotatably connected with a sliding shaft sleeve; a graphite packing component is arranged between the sliding shaft sleeve and the valve rod; the end cover and the sliding shaft sleeve are fixedly connected through a first fastener, and a sealing ring is arranged between the end cover and the sliding shaft sleeve; the sliding shaft sleeve is fixedly connected with the cylinder wall of the valve body assembly.

Furthermore, a device bracket is arranged between the actuating mechanism and a sliding shaft sleeve positioned at the same end of the valve rod, one end of the device bracket is connected with the actuating mechanism through a third fastening piece, and the other end of the device bracket is fixedly connected with the sliding shaft sleeve through a fourth fastening piece; a gland is arranged in the device bracket, and the valve rod transversely passes through the centers of the device bracket and the gland and is fixedly connected with the actuating mechanism; the gland is provided with a circle of bulges close to the valve rod, and the bulges can press the graphite packing assembly between the sliding shaft sleeve and the valve rod along the gap between the valve rod and the device bracket; the gland is fixedly connected with the device support and the sliding shaft sleeve through a second fastener and is used for compressing the sliding shaft sleeve and the graphite packing assembly.

Furthermore, the valve body assembly is of a cylindrical structure, two ends of the valve body assembly are outwards provided with bent edges, and the center of the cylinder wall is provided with a through hole penetrating through the valve rod; a packing pad is filled at the joint of the valve rod and the cylinder wall of the valve body assembly; and a disc spring group is arranged between the end cover and the graphite packing component and is used for compressing the graphite packing component.

Preferably, the actuating mechanism is a manual, electric, hydraulic or pneumatic device capable of driving the valve rod to rotate.

The utility model has the beneficial effects that:

1. the threshold of assembly skills is reduced, and the assembly efficiency is improved;

2. the high-temperature medium is prevented from moving, the potential jamming and failure rate of the valve are reduced, and the maintenance cost is reduced;

3. the product quality is improved, the components are prevented from being scratched in the mounting/dismounting process, and the service lives of the components are prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a view of a butterfly valve for high temperatures in accordance with an embodiment of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

In the figure, 1, an end cover, 2, a valve body assembly, 3, a valve plate assembly, 4, a limiting assembly, 5, a fourth fastener, 6, a device support, 7, an actuating mechanism, 8, a sliding shaft sleeve, 9, a conical pin assembly, 10, a gland, 11, an expansion sleeve, 12, a third fastener, 13, a second fastener, 14, a graphite packing assembly, 15, a packing pad, 16, a valve rod, 17, a disc spring assembly, 18, a sealing ring and 19 are first fasteners.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a butterfly valve for high temperature, comprising a valve rod 16; the valve rod 16 penetrates through the valve body assembly 2 and is rotatably connected with the valve body assembly 2; the valve plate assembly 3 is positioned in the valve body assembly 2, and the length of the valve plate assembly 3 is the same as the diameter of the inner circle of the valve body assembly 2; the central position of the valve rod 16 is fixedly connected with the valve plate assembly 3 through a taper pin assembly 9, and the valve plate assembly 3 is arranged on the valve rod 16 in parallel; the limiting component 4 is arranged on the inner side of the cylinder of the valve body component 2; the output end of the actuating mechanism 7 is fixedly connected with an expansion sleeve 11 fixed at one end of a valve rod 16, and the other end of the valve rod 16 is sealed by an end cover 1; the part of the valve rod 16 extending out of the valve body assembly 2 is rotatably connected with a sliding shaft sleeve 8; a graphite packing component 14 is arranged between the sliding shaft sleeve 8 and the valve rod 16; the end cover 1 and the sliding shaft sleeve 8 are fixedly connected through a first fastener 19, and a sealing ring 18 is arranged between the end cover 1 and the sliding shaft sleeve 8; the sliding shaft sleeve 8 is fixedly connected with the cylinder wall of the valve body component 2.

Furthermore, a device bracket 6 is arranged between the actuating mechanism 7 and a sliding shaft sleeve 8 positioned at the same end of the valve rod 16, one end of the device bracket 6 is connected with the actuating mechanism 7 through a third fastening piece 12, and the other end of the device bracket 6 is fixedly connected with the sliding shaft sleeve 8 through a fourth fastening piece 5; a gland 10 is arranged in the device bracket 6, and a valve rod 16 crosses the centers of the device bracket 6 and the gland 10 and is fixedly connected with the actuating mechanism 7; the gland 10 is provided with a circle of bulges close to the valve rod 16, and the bulges can press the graphite packing component 14 between the sliding shaft sleeve 8 and the valve rod 16 along the gap between the valve rod 16 and the device bracket 6; the gland 10 is fixedly connected with the device bracket 6 and the sliding shaft sleeve 8 through a second fastener 13 and is used for pressing the sliding shaft sleeve 8 and the graphite packing assembly 14.

Furthermore, the valve body assembly 2 is of a cylindrical structure, two ends of the valve body assembly are outwards provided with bent edges, and the center of the cylinder wall is provided with a through hole penetrating through the valve rod 16; a packing pad 15 is filled at the joint of the valve rod 16 and the cylinder wall of the valve body assembly 2; a disc spring group 17 is arranged between the end cover 1 and the graphite packing component 14 and used for tightly pressing the graphite packing component 14.

Preferably, the actuator 7 is a manual, electric, hydraulic or pneumatic device capable of rotating the valve rod 16.

The working process of the utility model is as follows:

the output end of the actuating mechanism 7 drives the expansion sleeve 11 and the valve rod 16 to rotate, and then torque is transmitted to the valve plate assembly 3 to drive the valve plate to rotate, so that the valve is opened, and opening and closing of the valve and on-off and size adjustment of smoke are realized. In the rotating process of the valve rod, the end cover 1 and the disc spring group 17 tightly press the graphite packing assembly 14, so that the phenomenon that graphite is adhered or the valve rod 16 is blocked due to the fact that graphite moves everywhere is prevented; meanwhile, the valve rod 16 is positioned by the packing pad 15, so that shaking cannot occur.

The utility model has the following advantages:

1) the positioning of the valve rod is changed from the right positioning of the existing device to the middle positioning, so that the positioning and the installation are simpler; the valve rod and the valve plate are positioned by the packing pads which are tightly pressed at the two ends, so that the left and right movement is prevented; an adjusting pad is cancelled, so that the problems of valve rod torque increase, failure of an actuating mechanism and the like caused by the adjusting pad are avoided; during assembly, the requirement on an assembler is low, the assembly reference and skill requirements are reduced, the assembly efficiency is greatly improved, and errors are reduced.

2) The valve adopts the dish spring to compress tightly graphite structure, and graphite is guaranteed to be the compaction state constantly by accurate, can not appear high temperature medium drunkenness along with the temperature height, has avoided adhesion and the jamming phenomenon to appear in the valve rod because of high temperature arouses.

3) The key groove connection mode of the valve rod and the actuating mechanism is changed into a special expansion sleeve structure torque transmission mode for the valve; the strength of the valve rod is ensured, the service life is prolonged, and the cost is reduced; the problem of the installation direction of a forward and reverse actuating mechanism does not need to be considered; the centering performance is good, and the assembly, disassembly or adjustment of the relative position of the shaft and the hub is convenient; stress concentration is avoided, the bearing capacity is high, and weakening caused by key grooves and the like can be effectively avoided; the expansion sleeve is convenient to mount/dismount and can be repeatedly used; meanwhile, the device is prevented from being installed in a wrong direction due to the direction of the key slot.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A butterfly valve for high temperatures, characterized by comprising a valve stem (16); the valve rod (16) penetrates through the valve body assembly (2) and is rotatably connected with the valve body assembly (2); the valve plate assembly (3) is positioned in the valve body assembly (2), and the length of the valve plate assembly (3) is the same as the diameter of the inner circle of the valve body assembly (2); the central position of the valve rod (16) is fixedly connected with the valve plate assembly (3) through a conical pin assembly (9), and the valve plate assembly (3) is arranged on the valve rod (16) in parallel; the limiting assembly (4) is arranged on the inner side of the cylinder of the valve body assembly (2); the output end of the actuating mechanism (7) is fixedly connected with an expansion sleeve (11) fixed at one end of a valve rod (16), and the other end of the valve rod (16) is sealed through an end cover (1); the part of the valve rod (16) extending out of the valve body assembly (2) is rotatably connected with a sliding shaft sleeve (8); a graphite packing component (14) is arranged between the sliding shaft sleeve (8) and the valve rod (16); the end cover (1) and the sliding shaft sleeve (8) are fixedly connected through a first fastener (19), and a sealing ring (18) is arranged between the end cover (1) and the sliding shaft sleeve (8); the sliding shaft sleeve (8) is fixedly connected with the cylinder wall of the valve body component (2).

2. A butterfly valve for high temperatures according to claim 1, characterised in that between the actuator (7) and the sliding sleeve (8) at the same end of the stem (16) there is a device support (6), one end of the device support (6) being connected to the actuator (7) by a third fastening (12) and the other end being fixedly connected to the sliding sleeve (8) by a fourth fastening (5); a gland (10) is arranged in the device bracket (6), and a valve rod (16) crosses the centers of the device bracket (6) and the gland (10) and is fixedly connected with an actuating mechanism (7); the gland (10) is provided with a circle of bulges tightly attached to the valve rod (16), and the bulges can press the graphite packing component (14) between the sliding shaft sleeve (8) and the valve rod (16) along the gap between the valve rod (16) and the device bracket (6); the gland (10) is fixedly connected with the device bracket (6) and the sliding shaft sleeve (8) through a second fastener (13) and is used for compressing the sliding shaft sleeve (8) and the graphite packing assembly (14).

3. The butterfly valve for high temperatures according to claim 1, characterized in that the valve body assembly (2) is cylindrical, with two ends bent outwards, and a through hole passing through the valve stem (16) is provided at the center of the cylinder wall; a packing pad (15) is filled at the joint of the valve rod (16) and the cylinder wall of the valve body assembly (2); a disc spring group (17) is arranged between the end cover (1) and the graphite packing component (14) and used for compressing the graphite packing component (14).

4. A butterfly valve for high temperatures according to claim 1, characterised in that said actuator (7) is a manual, electric, hydraulic or pneumatic device capable of rotating the stem (16).