CN201258699Y

CN201258699Y - Novel slurry rotary joint

Info

Publication number: CN201258699Y
Application number: CNU2008201169977U
Authority: CN
Inventors: 杜文阳; 孔庆华; 张忠海; 常仁齐; 李根营; 袁高安; 温建波; 陈慧
Original assignee: Xuzhou XCMG Road Construction Machinery Co Ltd
Current assignee: Xuzhou XCMG Foundation Construction Machinery Co Ltd
Priority date: 2008-05-24
Filing date: 2008-05-24
Publication date: 2009-06-17
Anticipated expiration: 2018-05-24

Abstract

The utility model discloses a novel slurry rotating joint used on a horizontal directional drill, comprising a shell, a mandrel, a spacer, a chuck ring, a chebyshev seal, a guide ring, an end cover and a pressure plate. The inner ring of the chuck ring is provided with a groove for pressing the chebyshev seal; the outer ring is provided with the groove for installing an O-shaped ring seal; the middle is provided with the spacer; the two sides of the spacer are respectively provided with two sets of chuck rings; the spacer and the chuck ring are arranged in the shell; two ends are fixed by the end cover; the mandrel penetrates a middle through hole; the slurry fluid goes into the spacer from a shell hole, flows through a plurality of holes arranged at the circumference of the spacer evenly, goes into the four holes arranged on the mandrel, then goes into the center hole of the mandrel, flows into the spindle hole of a power head forwards and arrives at the center hole of the drill stem. The slurry rotating joint of the utility model meets the requirements of slurry high pressure resistance, seal body self-lubrication and automatic compensation after abrasion, which can be used when granules are embedded and has long service life. At the same time, a seal body and a structural member are easy to purchase and process. The utility model has the advantages of good cost performance, low cost and convenient change, which is a good choice of replacing import mechanical seal.

Description

The new-type mortar swivel joint

Technical field

The utility model relates to a kind of swivel joint, the new-type mortar swivel joint that uses on particularly a kind of horizontal directional drilling machine.

Background technology

The mud swivel joint is the critical component of horizontal directional drilling machine, and its performance quality directly influences the functional performance of horizontal directional drilling machine.Creep into back in the process of dragging at rig, need carry high-pressure slurry to hole subdrilling head drilling tool, mud has effectiveness such as the retaining wall of support, lubricated drilling rod, suspension drilling cuttings, drags the prevention bit freezing to play an important role to creeping into back.

The swivel joint of state's this type of operating mode of exoadaptation mainly is a mechanical sealing.For guaranteeing sealing, sealing surface needs higher hardness and grinding precision, and increases each part processing installation accuracy, makes the swivel joint price high.Common seal with elastometic washer formula swivel joint, bad because of withstand voltage anti-wear performance, sealing is changed frequent, is difficult to satisfy construction requirement.Therefore seek suitable seal form, it is long to guarantee that it satisfies the applying working condition life-span, and the while can significantly reduce cost, and becomes the effective key in application of this type of swivel joint.

Summary of the invention

The purpose of this utility model provide a kind of satisfy certain pressure and the rotation operating mode under, lasting life cycle is longer, lower-cost new-type mortar swivel joint.

The purpose of this utility model is achieved in that this structure is made up of housing, mandrel, spacer, pressure ring, Che Shi sealing, guide ring, end cap, pressing plate and baffle plate, the Che Shi sealed clamping cleat is in pressure ring, there is the sealing of O type circle the pressure ring outer ring, pressure ring has two groups to be arranged symmetrically in the spacer both sides, mandrel passes from the centre of housing, there is centre bore the centre of mandrel, and radial loop is furnished with four holes on mandrel, and centre bore is connected with four holes that radially are periphery; Pressure ring, Che Shi sealing and O type circle are installed between housing and the mandrel, are fixed with end cap at the housing two ends, end cap tape guide ring; End at mandrel is connected with baffle plate.

Ring-shaped groove is all arranged on the inner and outer wall of described spacer, four holes that are periphery are arranged on ring-shaped groove.

On the described pressure ring outer wall outer channel is arranged, O type circle is installed in outer channel, on the described pressure ring inwall internal channel is arranged, the Che Shi sealing is installed on internal channel.

The utility model has the advantages that the hermetically-sealed construction pattern can satisfy high pressure resistant (being not less than 10MPa), self-lubricating, wearing and tearing backs is compensation automatically, and particle embeds characteristics such as still can use, thereby satisfies instructions for use.Seal and structural member are convenient to the processing buying, and cost performance is good, can significantly reduce cost, and are convenient to adopt in batches.

Description of drawings

Fig. 1 is an example structure figure of the present utility model.

Fig. 2 is the partial enlarged drawing at I position among Fig. 1.

Among the figure, 1.O type circle; 2. mandrel; 3. bolt; 4. packing ring; 5 end caps; 6. guide ring; 7. housing; 8. spacer; 9. Che Shi sealing; 10. pressure ring; 11.O type circle; 12. pressing plate; 13. bolt; 14. packing ring; 15. bolt; 16. packing ring; 17. baffle plate; 18. bolt.

The specific embodiment:

Embodiment 1: this structure is made up of housing 7, mandrel 2, spacer 8, pressure ring 10, Che Shi sealing 9, guide ring 6, end cap 5, pressing plate 12 and baffle plate 17, the Che Shi sealed clamping cleat is in pressure ring, there is the sealing of O type circle the pressure ring outer ring, pressure ring has two groups to be arranged symmetrically in the spacer both sides, mandrel passes from the centre of housing, there is centre bore the centre of mandrel, and radial loop is furnished with four holes on mandrel, and centre bore is connected with four holes that radially are periphery; Pressure ring, Che Shi sealing and O type circle are installed between housing and the mandrel, are fixed with end cap at the housing two ends, end cap tape guide ring; End at mandrel is connected with baffle plate.

High-pressure slurry liquid main channel is to flow into from housing 7 upper entrances, flow out from the lower core axis hole in cannelure in spacer 8 and number hole, wherein there is small amount of liquid to squeeze to both sides under pressure, the about 0.2mm in gap between spacer 8 and the mandrel 2, can stop the bigger impurity particle of carrying secretly in the liquid and enter sealing surface, liquid enters Che Shi and seals 9 end faces, oppresses its O type circle homogeneous deformation and expands, evenly closely overlay on mandrel thereby Che Shi is sealed the border, reach the purpose of seal fluid.Che Shi sealing is by filled polytetrafluoroethylene (PTFE) sealing slip ring and the combination of O type circle, has high life, low friction, high pressure resistant, wearing and tearing back sealing surface function such as compensation automatically under pressure.The Che Shi sealing is fitted with mandrel 2 and is worn several ring-shaped grooves, not only makes the applying better effects if, after a small amount of fine particle embeds body, because of its good self-lubricating property, still can continue to use.Two groups of series connection of every side are used, and make sealing effectiveness better.There is O type circle 11 the pressure ring outer ring as static seal.The guide ring 6 that has polytetrafluoroethylene (PTFE) to do in the end cap 5 at two ends plays support housing, the double sliding bearing of doing.Baffle plate 17 can prevent housing left and right sides play, after certain life cycle, when needing to change because of the seal wearing and tearing, only needs that sealing ring is pulled down and changed to end cap and gets final product.

Claims

1. new-type mortar swivel joint, it is characterized in that: this structure is made up of housing, mandrel, spacer, pressure ring, Che Shi sealing, guide ring, end cap, pressing plate and baffle plate, the Che Shi sealed clamping cleat is in pressure ring, there is the sealing of O type circle the pressure ring outer ring, pressure ring has two groups to be arranged symmetrically in the spacer both sides, and mandrel passes from the centre of housing, and there is centre bore the centre of mandrel, radial loop is furnished with four holes on mandrel, and centre bore is connected with four holes that radially are periphery; Pressure ring, Che Shi sealing and O type circle are installed between housing and the mandrel, are fixed with end cap at the housing two ends, end cap tape guide ring; End at mandrel is connected with baffle plate.

2. new-type mortar swivel joint according to claim 1 is characterized in that: ring-shaped groove is all arranged on the inner and outer wall of described spacer, four holes that are periphery are arranged on ring-shaped groove.

3. new-type mortar swivel joint according to claim 1 is characterized in that: on the described pressure ring outer wall outer channel is arranged, O type circle is installed in outer channel, on the described pressure ring inwall internal channel is arranged, the Che Shi sealing is installed on internal channel.