CN2239547Y

CN2239547Y - Split-ring metal hard sealing butterfly bamper

Info

Publication number: CN2239547Y
Application number: CN 95238066
Authority: CN
Inventors: 刘普成; 邹乐陶; 谢跃龙
Original assignee: CHANGSHA CITY VALVE FACTORY
Current assignee: CHANGSHA CITY VALVE FACTORY
Priority date: 1995-11-21
Filing date: 1995-11-21
Publication date: 1996-11-06
Anticipated expiration: 2005-11-21

Abstract

The utility model relates to an opening-ring metal hard sealing butterfly valve, which comprises a driving device, a heat insulating seat, a valve body, a butterfly plate, a main axle, a metal sealing ring in an opening-ring type, a pressing ring, an overlap block, a sealing block, springs I, II, a sealing seat in a straight cylinder shape, an axle sleeve, a positioning pin, a sealing pad and an end cover. The utility model has the advantages that when the butterfly valve adopting the structural form of the metal sealing ring in the opening-ring type is closed or opened, the structure has elastic deformation to enable the butterfly valve to effectively conduct heat compensation in normal temperature or high pressure. The utility model also has the advantages of good sealing performance, long service life, low cost, convenient manufacture and assembly and easy maintenance.

Description

The open loop type metal hard-sealing butterfly valve

The utility model relates to a kind of metal hard-sealing butterfly valve device, and it is applicable to thermoelectricity plant, in the pipe network of metallurgy, district heating system etc., opens, ends, regulates flow when making conveyance fluid and use.

In the prior art, as the wafer type metal hard-sealing butterfly valve that our factory is produced, the patent No. is 88212280.0, because of seal ring is stainless steel garden ring, after use a period of time, especially under high-temperature condition, work at butterfly valve, can not carry out thermal compensation, sealability is descended.

The purpose of this utility model is: design a kind of from normal temperature to the condition of high temperature under, good seal performance, and the high-intensity open loop type metal hard-sealing butterfly valve device that can carry out thermal compensation.

The utility model is a kind of high-performance, resistant to elevated temperatures open loop type metal hard-sealing butterfly valve, and it is by drive unit, heat-insulating base, valve body, axle sleeve, sealing gasket, butterfly plate, pin, pad, spring I, II, straight garden cylindricality sealing seat, main shaft, end cap, open loop type metal o-ring, trim ring, take buccal mass, locating stud, sealing block is formed.The open loop type metal o-ring is the garden that disconnects a mouth ring, by incision position, is processed with the groove of a Fixed width, thickness at the garden ring, takes buccal mass and is fixed in its groove.One of spring II is contained between the opening of taking buccal mass and open loop type metal o-ring, another spring II is contained between the fracture of open loop type metal o-ring, be processed with a square groove in the opening bi-side of taking buccal mass and open loop type metal o-ring, one of sealing block is fixed therein in the square groove, slide in its groove in the other end, another sealing block is contained in the square groove of disconnected opening bi-side processing of open loop type metal o-ring, and fixing arbitrary end.One of locating stud is fixed on open loop type metal o-ring (or taking buccal mass) and goes up in the hole of processing, is taking on the buccal mass (or open loop type metal o-ring) other end, movable in the waist shape location cotter way of processing, spring I is several, and etc. be contained between the seam of the interior garden cylinder of open loop type metal o-ring and butterfly plate.

The utility model compared with prior art its advantage is: because after adopting the structural type of open loop type metal o-ring, the malformation that seal ring is produced has replaced material deformation in the past, make butterfly valve the time, the intensity height is arranged, good seal performance from normal temperature and hot operation, and can form self-tightening sealing, can also automatically carry out thermal compensation, anufacturability is good, simple installation, maintenance easily, long service life.

Description of drawings

Fig. 1 is a main pseudosection of the present utility model

Fig. 2 is the plan view of the utility model seal ring (13)

Fig. 3 is the plan view of the utility model seal ring (13)

Below in conjunction with description of drawings embodiment

The utility model open loop type metal hard-sealing butterfly valve, see Fig. 1,2,3, when closing butterfly valve, drive unit (1) drives main shaft (11) and rotates, butterfly plate (6) is housed on main shaft (11), open loop type metal o-ring (13) is housed again on the butterfly plate (6), sealing gasket (5), pad (8), trim ring (14) etc. also rotates with main shaft (11), owing on the open loop type metal o-ring (13) fracture is arranged, and near its fracture, be processed with a Fixed width, the groove of thickness, in groove, be fixed with and take buccal mass (15), open loop type metal o-ring (13) is gone up formed the fracture of dislocation mutually, can prevent from the direct earial drainage of incision position, open loop type metal o-ring (13) and take buccal mass (15) fracture and open loop type metal o-ring (13) fracture between spring II (17) all is housed, it is to be used for making between open loop type metal o-ring (13) and the straight garden cylindricality sealing seat (10) forming initial sealing load.(18) one of sealing blocks are fixed in the groove of taking the processing of buccal mass (15) [or open loop type metal o-ring (13)] fracture side, can slide in the groove of open loop type metal o-ring (13) [or taking buccal mass (15)] fracture side processing in the other end, one end of another sealing block (18), be packed in the groove of fracture side processing of an end of open loop type seal ring (13), the other end can slide in the groove of the another side of its fracture processing, go up on the dislocation fracture that forms at open loop type metal o-ring (13), sealing block (18) is all arranged, this can form two way sealed, when the outer garden of open loop type metal o-ring (13) cylinder be contained in valve body (3) inwall on straight garden cylindricality sealing seat (10) when contacting, dislocation fracture on the open loop type metal o-ring (13) all shrinks and diminishes, external diameter is diminished, can avoid mutual scratch.When butterfly valve is continued to be closed to sealing station, because the acting in conjunction of spring I, II (9), (17), the opening of incision position is to become big gradually, open loop type metal o-ring (13) external diameter is increased, and tightly contact with straight garden cylindricality sealing seat (10), reach good sealing effect, spring I (9) is several, stop portion Deng interior garden cylinder that is contained in open loop type metal o-ring (13) and valve plate (6), it is used for making open loop type metal o-ring (13) location, and can make open loop type metal o-ring (13) that the effect of outer tensioning is arranged.When the pipeline internal medium increased pressure, the pressure that acts on the interior garden of open loop type metal o-ring (13) cylinder also increases thereupon, can make open loop type metal o-ring (13) be adjacent to straight garden cylindricality sealing seat (10) more like this, form self-tightening sealing, make sealing effect better.When opened butterfly valve, open loop type metal o-ring (13) on the butterfly plate (6) is in the contact area of straight garden cylindricality sealing seat (10), its fracture diminishes gradually, can prevent scratch, after butterfly plate (6) leaves straight garden shape sealing seat (10), open loop type metal o-ring (13) opens thereupon, up to locating stud (16) slides into the maximum constraints position in the cotter way of location till.

Claims

1, a kind of open loop type metal hard-sealing butterfly valve, by drive unit (1), heat-insulating base (2), valve body (3), axle sleeve (4), sealing gasket (5), butterfly plate (6), pin (7), pad (8), spring I (9), straight garden cylindricality sealing seat (10), main shaft (11), end cap (12), open loop type metal o-ring (13), trim ring (14), take buccal mass (15), locating stud (16), spring II (17), sealing block (18) is formed, it is characterized in that: open loop type metal o-ring (13) is the garden that disconnects a mouth ring, by incision position, be processed with a Fixed width at the garden ring, the groove of thickness is taken buccal mass (15) and is fixed in its groove, (17) 1 of spring II are contained between the opening of taking buccal mass (15) and open loop type metal o-ring (13), another spring II (17) is contained between the fracture of open loop type metal o-ring (13), and (18) one of sealing blocks are contained in the square groove of taking buccal mass (15) and the processing of open loop type metal o-ring (13) opening bi-side, and fixing arbitrary end, another sealing block (18) is installed in the square groove of incision position bi-side processing of open loop type metal o-ring (13), and fixing arbitrary end.

2, butterfly valve according to claim 1, it is characterized in that: (16) one of locating studs are fixed in the hole of open loop type metal o-ring (13) [or taking buccal mass (15)] processing, and the other end is in taking the waist shape location cotter way of the last processing of buccal mass (15) [or open loop type metal o-ring (13)].

3, butterfly valve according to claim 1 is characterized in that: spring I (9) is several, and etc. be contained between the seam of the interior garden cylinder of open loop type metal o-ring (13) and butterfly plate (6).