CN213655759U

CN213655759U - Heat-resistant butterfly valve

Info

Publication number: CN213655759U
Application number: CN202022604430.8U
Authority: CN
Inventors: 张鹏; 杨会梅
Original assignee: Shijiazhuang Shiye Valve Manufacturing Co ltd
Current assignee: Shijiazhuang Shiye Valve Manufacturing Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-07-09
Anticipated expiration: 2030-11-12

Abstract

The utility model discloses a heat-resistant butterfly valve, which comprises a valve body, wherein a valve plate capable of being opened and closed is rotatably arranged at the inner side of the valve body, an upper valve rod and a lower valve rod are respectively arranged at the top and the bottom of the valve plate, limiting flanges are arranged at the two ends of the upper valve rod, shaft end sealing assemblies are arranged at the two sides of the top of the upper valve rod, an upper shaft end supporting assembly is arranged on the top end surface of the upper valve rod, and a lower shaft end supporting assembly is arranged at the bottom position of the lower valve rod; the shaft end sealing assembly comprises a plurality of groups of oil-immersed asbestos graphite packing arranged on two sides of the upper valve rod; through the design of the utility model, the valve structure adopts the bearing external support anti-lock; the shaft ends at two sides adopt a plurality of groups of oil-immersed asbestos graphite packing to isolate heat brought by a medium, and the shaft ends of the X-shaped sealing ring packing are sealed, so that the sealing is reliable and does not leak; the lower shaft end supporting assembly is provided with a split semi-ring for axial positioning of the valve rod, and a space for expansion with heat and contraction with cold is reserved.

Description

Heat-resistant butterfly valve

Technical Field

The utility model belongs to the technical field of the butterfly valve, concretely relates to heat-resistant type butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve with a closing member which is a disc and rotates around a valve shaft to open and close.

When the existing butterfly valve is used in coal gas, air and flue gas pipelines of high-temperature media, the heat resistance of the existing butterfly valve is poor, so that the phenomenon of poor sealing effect can occur in long-term use, the phenomenon of shaft locking cannot be reported when the circular rotation support of the valve is used, great troubles are caused for subsequent overhaul, the service life is prolonged, and the replacement cost is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heat-resistant type butterfly valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a heat-resistant butterfly valve comprises a valve body, wherein a valve plate capable of being opened and closed is rotatably arranged on the inner side of the valve body, an upper valve rod and a lower valve rod are respectively arranged at the top and the bottom of the valve plate, limiting flanges are arranged at two ends of the upper valve rod, shaft end sealing assemblies are arranged at two sides of the top of the upper valve rod, an upper shaft end supporting assembly is arranged on the top end surface of the upper valve rod, and a lower shaft end supporting assembly is arranged at the bottom end of the lower valve rod;

the shaft end sealing assembly comprises a plurality of groups of oil-immersed asbestos graphite packing arranged on two sides of the upper valve rod, the oil-immersed asbestos graphite packing is arranged on the inner side of the upper valve rod and the limiting flange, the packing box is further placed at the top of the oil-immersed asbestos graphite packing, the first O-shaped sealing ring is further installed at the side edge of the packing box and the joint of the limiting flange, the X-shaped sealing ring is placed on the inner side of the packing box, the packing gland used for extruding the X-shaped sealing ring is further embedded into the top of the inner side of the packing box, and a limiting stud used for fastening is installed between the packing gland and the packing box.

Preferably, lower axle head supporting component by the lower end cover, to opening the semi-ring, O shape sealing washer three, the vice two of external slide bearing, vice gland constitution, the lower end cover is established on the bottom face of lower valve rod, and the flange is still installed to the bottom of this lower valve rod, and still is fixed with the double-screw bolt one that is used for being connected between lower end cover and the flange, the ring channel has been seted up on the bottom surface of lower valve rod, run from opposite directions the semi-ring card and go into the inboard to the ring channel, the bottom of valve rod under is established to the vice two of O shape sealing washer and external slide bearing from last cover in proper order down, just O shape sealing washer three is in the top of running from opposite directions the semi-ring, vice gland is in the top of the vice two of external slide bearing, and both are the perpendicular laminating form, still install between vice gland.

Preferably, the upper shaft end supporting assembly is composed of a first external sliding bearing pair, a second O-shaped sealing ring and a main gland, the number of the second O-shaped sealing ring is two, the second O-shaped sealing ring is located on the outer side of the first external sliding bearing pair, and the second O-shaped sealing ring and the first external sliding bearing pair are both attached to the top surface of the upper valve stem.

Preferably, the main gland is in limit fit with a flange at the top of the upper valve rod, and a fastening bolt for fixing penetrates through the joint of the main gland and the flange.

Preferably, an electric actuator is further arranged outside the valve body and is located on one side of the upper shaft end supporting assembly.

Preferably, the valve plate is formed of two semicircular plate-shaped bodies, and a shaft for rotating is further installed between the two plate-shaped bodies.

Compared with the prior art, the beneficial effects of the utility model are that:

through the design of the utility model, the valve structure adopts the bearing external support anti-lock; the shaft ends at two sides adopt a plurality of groups of oil-immersed asbestos graphite packing to isolate heat brought by a medium, and the shaft ends of the X-shaped sealing ring packing are sealed, so that the sealing is reliable and does not leak; the lower shaft end supporting assembly is provided with a split semi-ring for axial positioning of the valve rod, and a space for expansion with heat and contraction with cold is reserved; the support component of the valve operation is separated from the medium, the shaft locking is prevented, the valve is not blocked, the disassembly is convenient and easy to overhaul, the valve is high temperature resistant, the opening and closing are flexible, the action is reliable, and the service life is long.

Drawings

FIG. 1 is a schematic view of the structural assembly of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is an enlarged schematic view of region A of FIG. 1 according to the present invention;

FIG. 4 is an enlarged schematic view of the area B of FIG. 1 according to the present invention;

fig. 5 is an enlarged schematic view of the region C in fig. 1 according to the present invention.

In the figure: 1. a valve body; 2. a valve plate; 3. an upper valve stem; 4. a lower valve stem; 8; an electric actuator; 9. a plurality of groups of oil-immersed asbestos graphite packing; 10. a first O-shaped sealing ring; 11. a stuffing box; 12. an X-shaped sealing ring; 13. a packing gland; 14. a limiting stud; 15. an external sliding bearing pair; 16. an O-shaped sealing ring II; 17. a main gland; 18. fastening a bolt; 19. a stud I; 20. a lower end cover; 21. half-ring opening; 22. an O-shaped sealing ring III; 23. a second external sliding bearing pair; 24. a secondary gland; 25. and a second stud.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 5, the present invention provides a technical solution: a heat-resistant butterfly valve comprises a valve body 1, wherein a valve plate 2 capable of being opened and closed is rotatably arranged on the inner side of the valve body 1, an upper valve rod 3 and a lower valve rod 4 are respectively arranged at the top and the bottom of the valve plate 2, limiting flanges are arranged at two ends of the upper valve rod 3, shaft end sealing assemblies are arranged at two sides of the top of the upper valve rod 3, an upper shaft end supporting assembly is arranged on the top end surface of the upper valve rod 3, and a lower shaft end supporting assembly is arranged at the bottom position of the lower valve rod 4; the shaft ends at two sides adopt a plurality of groups of oil-immersed asbestos graphite packing 9 to isolate heat brought by a medium, and the shaft ends of the packing of the X-shaped sealing ring 12 are sealed, so that the sealing is reliable and does not leak; the lower shaft end supporting component is provided with split half rings 21 for axial positioning of the valve rod, and a space for expansion with heat and contraction with cold is reserved; the valve moving support component is separated from the medium, prevents the shaft locking, is not blocked, is convenient and easy to disassemble, is high temperature resistant, is flexible to open and close, and has reliable action and long service life:

shaft end seal assembly is including setting up the oily asbestos graphite packing 9 of multiunit in last valve rod 3 both sides, this multiunit oily asbestos graphite packing 9 is in the inboard of spacing flange and last valve rod 3, packing box 11 has still been placed at the top of multiunit oily asbestos graphite packing 9, O shape sealing washer 10 is still installed with spacing flange laminating department to packing box 11 side, X shape sealing washer 12 has been placed to packing box 11's inboard, packing box 11's inboard top still imbeds and is used for extrudeing gland 13 of X shape sealing washer 12, install the spacing double-screw bolt 14 that is used for the fastening between gland 13 and the packing box 11.

In this embodiment, preferably, the lower shaft end support assembly is composed of a lower end cover 20, two half rings 21, a third O-ring 22, a second external sliding bearing pair 23, and a second pressing cover 24, the lower end cover 20 is sleeved on the bottom end surface of the lower valve rod 4, a flange is further installed at the bottom of the lower valve rod 4, a first stud 19 for connection is further fixed between the lower end cover 20 and the flange, an annular groove is formed in the bottom surface of the lower valve rod 4, the two half rings 21 are clamped into the inner side of the annular groove, the third O-ring 22 and the second external sliding bearing pair 23 are sequentially sleeved at the bottom of the lower valve rod 4 from bottom to top, the third O-ring 22 is located at the top of the two half rings 21, the second pressing cover 24 is located at the top of the second external sliding bearing pair 23, and the two external sliding bearing pairs are vertically attached, and a second stud 25 for fixation is further installed between.

In this embodiment, preferably, the upper shaft end support assembly is composed of a first external sliding bearing pair 15, a second O-ring 16 and a main gland 17, two second O-rings 16 are provided, the two second O-rings 16 are located outside the first external sliding bearing pair 15, and both the second O-rings 16 and the first external sliding bearing pair 15 are attached to the top surface of the upper valve stem 3.

In this embodiment, preferably, the main gland 17 is in limit fit with a flange at the top of the upper valve stem 3, and a fastening bolt 18 for fixing penetrates through the joint of the main gland and the flange.

In this embodiment, preferably, an electric actuator 8 is further disposed outside the valve body 1, and the electric actuator 8 is located at one side of the upper shaft end support assembly.

In the present embodiment, the valve plate 2 is preferably formed of two semicircular plate-like bodies, and a shaft for rotating is further mounted between the two plate-like bodies.

The utility model discloses a theory of operation and use flow: the utility model discloses when using, open and be closed through valve plate 2, make the fluid in the valve body 1 can carry out normal transmission, in use, valve plate 2 drives the rotation of axle through last valve rod 3 and lower valve rod 4 and opens, after opening the completion, lower valve rod 4 increases the leakproofness through two pairs 23 of external slide bearing and three 22 of O shape sealing washer, and the heat that brings through the oily asbestos graphite packing of multiunit 9, the 12 axle head seals of X shape sealing washer, fix a position lower valve rod 4 through opening half ring 21 simultaneously, and make the ring channel and open the space of reserving expend with heat and contract with cold between the half ring 21.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a heat-resistant type butterfly valve, includes valve body (1), but the inboard rotatory valve plate (2) of installing of valve body (1) is opened and close, valve rod (3) and lower valve rod (4) are installed respectively to the top and the bottom of valve plate (2), stop flange, its characterized in that are installed at the both ends of going up valve rod (3): shaft end sealing assemblies are arranged on two sides of the top of the upper valve rod (3), an upper shaft end supporting assembly is arranged on the top end face of the upper valve rod (3), and a lower shaft end supporting assembly is arranged at the bottom end of the lower valve rod (4);

shaft end seal assembly is including setting up the inboard that sets up the oily asbestos graphite packing (9) of multiunit in last valve rod (3) both sides, this multiunit oily asbestos graphite packing (9) are in spacing flange and last valve rod (3), packing box (11) have still been placed at the top of the oily asbestos graphite packing (9) of multiunit, O shape sealing washer (10) are still installed with spacing flange laminating department to packing box (11) side, X shape sealing washer (12) have been placed to the inboard of packing box (11), the inboard top of packing box (11) still imbeds gland (13) that are used for extrudeing X shape sealing washer (12), install between gland (13) and packing box (11) and be used for spacing double-screw bolt (14) of fastening.

2. A heat resistant butterfly valve according to claim 1, wherein: the lower shaft end supporting assembly is composed of a lower end cover (20), a split half ring (21), an O-shaped sealing ring III (22), an external sliding bearing pair II (23) and an auxiliary pressing cover (24), the lower end cover (20) is sleeved on the bottom end face of the lower valve rod (4), a flange is further installed at the bottom of the lower valve rod (4), a first stud bolt (19) used for connection is further fixed between the lower end cover (20) and the flange, an annular groove is formed in the bottom surface of the lower valve rod (4), the split half ring (21) is clamped into the inner side of the annular groove, the O-shaped sealing ring III (22) and the external sliding bearing pair II (23) are sequentially sleeved at the bottom of the lower valve rod (4) from top to bottom, the O-shaped sealing ring III (22) is located at the top of the split half ring (21), the auxiliary pressing cover (24) is located at the top of the external sliding bearing pair II (23), and the O-shaped sealing ring III, and a second stud (25) for fixing is further arranged between the auxiliary gland (24) and the flange.

3. A heat resistant butterfly valve according to claim 1, wherein: go up axle head supporting component and constitute by the vice one (15) of external slide bearing, O shape sealing washer two (16) and main gland (17), O shape sealing washer two (16) is provided with two, and two O shape sealing washer two (16) are in the outside of the vice one (15) of external slide bearing, O shape sealing washer two (16) and the vice one (15) of external slide bearing all laminate with the top surface of last valve rod (3) mutually.

4. A heat resistant butterfly valve according to claim 3, wherein: the main gland (17) is in limit fit with a flange at the top of the upper valve rod (3), and a fastening bolt (18) for fixing penetrates through the joint of the main gland and the upper valve rod.

5. A heat resistant butterfly valve according to claim 1, wherein: an electric actuator (8) is further arranged outside the valve body (1), and the electric actuator (8) is located on one side of the upper shaft end supporting assembly.

6. A heat resistant butterfly valve according to claim 1, wherein: the valve plate (2) is composed of two semicircular plate-shaped bodies, and a shaft for rotating is further installed between the two plate-shaped bodies.