CN201858376U - Novel non-rising stem type flat-plate gate valve - Google Patents

Abstract

The utility model relates to a novel non-rising stem type flat-plate gate valve which belongs to the technical field of gate valve manufacturing and consists of a multi-revolving executor, a connecting bracket, a sealed pull stem column, a rotary-pressing bearing shell, a sealed cylinder body, a valve body, a valve stem, a valve plate core, a valve seat and the like, wherein the upper part of the valve body is provided with the sealed cylinder body and the multi-revolving executor; the sealed pull stem column is arranged in the sealed cylinder body through an axial thrust bearing and a conical roller bearing; the valve stem is arranged in a screw hole of the sealed pull stem column; and the lower end of the valve stem is connected with the valve plate core. The multi-revolving executor drives the sealed pull stem column to rotate left and right so as to drive the valve stem to move up and down, thereby driving the valve plate core to be opened or closed; the sealing surface cannot be easily polluted and corroded, and the sealing property is pretty good. The non-rising stem type flat-plate gate valve not only overcomes the defect that the surface of the valve stem of a rising stem type flat-plate gate valve can be easily stained with pollutants and then the sealing surface can be easily scratched and corroded so that the service life of the gate valve is affected, but also solves the problem that the non-rising stem type gate valve can only be applied to occasions with large/medium caliber under low pressure due to limited structure.

Description

Novel blind rod type plate valve

Technical field

The utility model relates to a kind of novel blind rod type plate valve, belongs to gate valve manufacturing technology field.

Background technique

Gate valve is one of the most frequently used block valve, is mainly used to connect or block the medium in the pipeline, and flat gate valve is simple, rational in infrastructure because of its body, and sealing is good, and temperature range is big, and anufacturability is good; In being specially adapted to, low pressure, big, medium caliber, medium is tap water, sewage, crude oil, oils or rock gas and the big important events of dust content.Flat gate valve can be divided into rising stem (RS.) formula and blind rod type plate valve by its stem structure and motion mode.

Rising stem (RS.) formula plate valve is to drive flashboard elevating movement together by valve rod, motion thread on the valve rod is in the valve body outside, therefore, keying and the position that can judge flashboard intuitively according to the moving direction and the position of valve rod, and also motion thread is convenient to lubricated and is not subjected to flow-induced corrosion.Owing to need during valve opening flashboard is risen to the valve base channel top fully, flashboard all need be fallen again when closing and block valve base channel, so the keying stroke of flashboard and valve rod is very big, when flashboard rests in the process of opening or cutting out for a long time, because the sealing position of valve rod exposes for a long time in fluid or air dielectric, its stem surface is easy to adhere to dirt and is corroded, and easily causes seal surface to produce scratch until damage, thereby the destruction sealability influences working life.

The motion thread of blind rod type plate valve is positioned at flashboard inside, and in opening-closing process, valve rod only rotates, and flashboard is because of the lifting in the valve body that is rotated in of valve rod.Therefore, because valve rod and Sealing do not have axial relative movement, its sealing surface is difficult for contaminated, corrosion, the working life of having improved crucial transmission part greatly.But all at present blind rod type gate valves be because the restriction of its structure all can only be applied to low pressure, the occasion of big, medium caliber; And the sealing of neck very easily produces leakage in use for some time.

Summary of the invention

The purpose of this utility model is, provides a kind of flashboard by uniqueness to open and close structure, has filled up not being applicable to middle pressure in the market, the novel blind rod type plate valve under big, the medium caliber environment.The valve rod and the Sealing of the existing former blind rod type plate valve of this valve do not have axial relative movement, and that the screw mandrel sealing surface is difficult for is contaminated, the advantage of corrosion; Again because of having many group Glais rings, wear ring to have fabulous wear-resisting withstand voltage effect, and can satisfy the advantage that no oil condition uses, the working life of having improved plate valve greatly.

The utility model is to realize above-mentioned purpose by following technical solution:

This novel blind rod type plate valve is by many revolutions final controlling element, connect support, sealing pull bar post, the spinning cartridge housing, axial thrust bearing, sealed cylinder block, sprue, tapered roller bearing, lifting screw, Glais ring, the wear-resistant seal ring, valve body, valve rod, valve plate core and valve seat constitute, valve body top is fixed with sealed cylinder block by lifting screw, sealed cylinder block top is fixed with many revolution final controlling element by connecting support, it is characterized in that: pass through the spinning cartridge housing in the described sealed cylinder block, axial thrust bearing and tapered roller bearing are equipped with sealing pull bar post, the center of sealing pull bar post is manufactured with a screw, valve rod is housed in the screw, and the lower end of valve rod connects the valve plate core.Be manufactured with the release of pressure groove on the described sealing pull bar post, horizontal slot one end of release of pressure groove is equipped with sprue; The outer surface of sealing pull bar post is equipped with Glais ring and wear-resistant seal ring.

This novel blind rod type plate valve beneficial effect compared with prior art is:

1, opens and closes parts and adopt the floating type sealing configuration of novel balance, guarantee the good airtight performance of valve rod under dynamic and static state; Opening and closing the equal surfacing of parts sealing surface has high nickel hard alloy, has characteristics anticorrosion, wear-resisting, long working life.

2, lifting feature is built in hoisting nut on the sealing pull bar post, and adopts the combined labyrinth and carbon gland technology between the valve body, has promoted the sealability and the life-span of valve neck greatly; Can be applicable to that pressure is not more than 32MPa, temperature is not higher than 120 ℃ water, uses on the pipelines such as oil, mud, rock gas.

3, the structural design novelty, estimate strictness, operation automation, have stronger anticorrosion, wear-resisting, erosive wear resistance, be specially adapted to use on the petroleum industry.

Description of drawings:

Fig. 1 is the main TV structure schematic representation of novel blind rod type plate valve;

Fig. 2 is the left TV structure schematic representation of novel blind rod type plate valve.

Among the figure: 1, turn round final controlling element, 2, connect support, 3, screw more, 4, sealing pull bar post, 5, the spinning cartridge housing, 6, axial thrust bearing, 7, sealed cylinder block, 8, the release of pressure groove, 9, tapered roller bearing, 10, lifting screw, 11, Glais ring, 12, the wear-resistant seal ring, 13, valve body, 14, valve rod, 15, the valve plate core, 16, valve seat, 17, sprue.

Embodiment:

This novel blind rod type plate valve is made of many revolutions final controlling element 1, connection support 2, sealing pull bar post 4, spinning cartridge housing 5, axial thrust bearing 6, sealed cylinder block 7, release of pressure groove 8, tapered roller bearing 9, lifting screw 10, Glais ring 11, wear-resistant seal ring 12, valve body 13, valve rod 14, valve plate core 15, valve seat 16 and sprue 17.Valve body 13 tops are fixed with sealed cylinder block 7 by lifting screw 10, and sealed cylinder block 7 tops are fixed with many revolution final controlling element 1 by connecting support 2.By spinning cartridge housing 5, axial thrust bearing 6 and tapered roller bearing 9 sealing pull bar post 4 is installed in the described sealed cylinder block 7, the center of sealing pull bar post 4 is manufactured with a screw 3, screw 3 bottoms of sealing pull bar post 4 are manufactured with internal thread, valve rod 14 tops have been manufactured with outside thread, and valve rod 14 and screw 3 are by being threaded; The lower end of valve rod 14 connects valve plate core 15.Be manufactured with release of pressure groove 8 on the described sealing pull bar post 4, horizontal slot one end of release of pressure groove 8 is equipped with sprue 17, self-relieving effect when reaching valve rod 14 liftings.The outer surface of sealing pull bar post 4 is equipped with Glais ring 11 and wear-resistant seal ring 12.

When this novel blind rod type plate valve is worked, by connecting many revolutions final controlling element 1 on support 2 tops, sealing pull bar post 4 left rotation and right rotation that drive is fixed by axial thrust bearing 6 and tapered roller bearing 9,4 internal threads by screw 3 of sealing pull bar post drive valve rod 14 upper and lower motions, and then drive valve plate core 15 is opened or closed.Sealing pull bar post 4 is sealed in and connects in support 2 and the sealed cylinder block 7, and valve plate core 15 when opening or closing 4 on sealing pull bar post rotate, do not do moving up and down, contaminated, corrosion that its sealing surface is difficult for; And Glais ring 11 is installed the outer surface of sealing pull bar post 4 and wear-resistant seal ring 12 seals, and sealability is very good.The sealing position of valve rod exposed for a long time in fluid or air dielectric so this novel blind rod type plate valve has both overcome rising stem (RS.) formula plate valve, stem surface is easy to adhere to dirt and is corroded, easily cause seal surface to produce scratch until damage, thereby the destruction sealability influences the deficiency in working life; Solved the blind rod type gate valve again because the restriction of its structure can only be applied to low pressure, the problem of big, medium caliber occasion.

Claims (2)

1. this novel blind rod type plate valve, it is by many revolutions final controlling element (1), connect support (2), sealing pull bar post (4), spinning cartridge housing (5), axial thrust bearing (6), sealed cylinder block (7), tapered roller bearing (9), lifting screw (10), Glais ring (11), wear-resistant seal ring (12), valve body (13), valve rod (14), valve plate core (15), valve seat (16) and sprue (17) constitute, valve body (13) top is fixed with sealed cylinder block (7) by lifting screw (10), sealed cylinder block (7) top is fixed with many revolution final controlling element (1) by connecting support (2), it is characterized in that: pass through spinning cartridge housing (5) in the described sealed cylinder block (7), axial thrust bearing (6) and tapered roller bearing (9) are equipped with sealing pull bar post (4), the center of sealing pull bar post (4) is manufactured with a screw (3), valve rod (14) is housed in the screw (3), and the lower end of valve rod (14) is connected with valve plate core (15).

2. novel blind rod type plate valve according to claim 1 is characterized in that: the outer surface of described sealing pull bar post (4) is equipped with Glais ring (11) and wear-resistant seal ring (12); Be manufactured with release of pressure groove (8) on the sealing pull bar post (4), horizontal slot one end of release of pressure groove (8) is equipped with sprue (17).

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