CN201449318U

CN201449318U - Sealing device for water pressure test tube

Info

Publication number: CN201449318U
Application number: CN2009200339123U
Authority: CN
Inventors: 刘邯涛; 王晓璋; 朱纪刚; 孙丽丽
Original assignee: China National Heavy Machinery Research Institute Co Ltd
Current assignee: China National Heavy Machinery Research Institute Co Ltd
Priority date: 2009-07-16
Filing date: 2009-07-16
Publication date: 2010-05-05
Anticipated expiration: 2019-07-16

Abstract

The utility model relates to a sealing device for a water pressure test tube. The sealing device comprises a valve body 9, wherein one side of the valve body 9 is provided with a propulsion device 10, the middle of the valve body 9 is provided with a four-way valve 24, the other side of the valve body 9 is provided with an experimental steel pipe 25 communicated with one port of the four-way valve 24, a compression ring III 18, a sealing ring II 20 and a compression ring IV 22 are sequentially sheathed on an outer ring of the experimental steel pipe 25, a bushing ring II 19 is pressed on the sealing ring II 20, a compression ring I 11, a sealing ring I 13 and a compression ring II 14 are sequentially sheathed at a low pressure water inlet end of the four-way valve 24, and a bushing ring II 19 provided with a channel is arranged on the experimental steel pipe 25 to take in high pressure water; as the area of the outer ring of the sealing ring II 20 is larger than that of an inner ring thereof, the pressure of external high pressure water is utilized for tightly holding the sealing ring II 20, thereby realizing self sealing; and the self sealing of a valve core rod 3 is realized in a similar way. The sealing device is characterized by simple sealing structure, shortened pressure test length of blind areas, convenient specification adjustment and broad applicable scope.

Description

A kind of hydraulic pressure test tube packoff

Technical field

The utility model relates to a kind of packoff, particularly a kind of hydraulic pressure test tube packoff.

Background technology

Traditional hydraulic pressure test tube machine at first, generally can only carry out the test of single steel pipe, and especially at diameter of steel tube hour, efficient is especially low; Secondly, traditional hydraulic pressure test tube machine, seal form generally adopts radial seal when test pressure surpasses 25MPa, and it is that sealing system supply water under high pressure is realized sealing that the independent high-pressure pump of a cover must be arranged, and has increased the operation and maintenance cost; The 3rd, traditional radial seal test is because the sealed circle of steel pipe head encases, and high pressure can't be tested for very long one section steel tube head, makes steel pipe tube head position have the pressure testing blind area.

Summary of the invention

In order to overcome the defective of above-mentioned prior art, the purpose of this utility model is to provide a kind of hydraulic pressure test tube packoff, has that hermetically-sealed construction is simple, a blind area pressure testing contraction in length, convenient specification adjustment, the characteristics of wide accommodation.

In order to achieve the above object, the technical solution of the utility model is achieved in that a kind of hydraulic pressure test tube packoff, comprise link 4, the top of link 4 is provided with hoist cylinder 1, the end of link 4 is valve bodies 9, one side of valve body 9 is propulsion plants 10, the centre of valve body 9 is four-ways 24, opposite side is the experiment steel pipe 25 that is connected with four-way 24 1 ports, be socketed with pressure ring I II18 successively on the outer ring of experiment steel pipe 25, sealing ring II 20 and pressure ring I V22, be pressed with grommet II 19 on the sealing ring II 20, be pressed with high-pressure seal ring III21 on the pressure ring I V22, and by sealing gasket 23 and compress screw 26 sealing and fixing, four-way 24 low-pressure water entrance points socket successively are provided with pressure ring I 11, sealing ring I 13 and pressure ring I I 14, be pressed with grommet I 12 on the sealing ring I 13, the outermost of pressure ring I I 14 is fixing by pressing plate 15.

Described link 4 is provided with orienting sleeve I 5 with the junction of valve body 9, and orienting sleeve I 5 is provided with high-pressure seal ring I 6 with the junction of orienting sleeve II 8, is socketed with high-pressure seal ring II 7 on the orienting sleeve II 8.

Described grommet I 12 or grommet II 19 outline edges are dentation, and there is groove 27 on the surface.

The two ends up and down of one pillar of described link 4 respectively are equipped with position transducer 2.

Described hoist cylinder 1 is provided with telescopic valve core rod 3.

Because the utility model is provided with the grommet II 19 that has groove at experiment steel pipe 25 places and introduces water under high pressure, because the outer ring area of sealing ring II 20 greater than the inner ring area, utilizes the pressure of outer water under high pressure to hold sealing ring II 20 tightly, realizes self sealss; In like manner realize the self sealss of valve core rod 3.

Description of drawings

Fig. 1 is a structure principle chart of the present utility model.

Fig. 2 is the front view of grommet I 12 or grommet II 19.

Embodiment

Below in conjunction with accompanying drawing structural principle of the present utility model and principle of work are described in detail.

With reference to Fig. 1, a kind of hydraulic pressure test tube packoff, comprise link 4, the top of link 4 is provided with hoist cylinder 1, hoist cylinder 1 is provided with telescopic valve core rod 3, the two ends up and down of one pillar of link 4 respectively are equipped with position transducer 2, the end of link 4 is valve bodies 9, one side of valve body 9 is propulsion plants 10, the centre of valve body 9 is four-ways 24, opposite side is the experiment steel pipe 25 that is connected with four-way 24 1 ports, be socketed with pressure ring I II18 successively on the outer ring of experiment steel pipe 25, sealing ring II 20 and pressure ring I V22, be pressed with grommet II 19 on the sealing ring II 20, be pressed with high-pressure seal ring III21 on the pressure ring I V22, and by sealing gasket 23 and compress screw 26 sealing and fixing, four-way 24 low-pressure water entrance points socket successively are provided with pressure ring I 11, sealing ring I 13 and pressure ring I I 14, be pressed with grommet I 12 on the sealing ring I 13, the outermost of pressure ring I I 14 is fixing by pressing plate 15.

Described four-way 24 is the parts on the valve body 9, is an integral body with valve body 9 promptly, and car comes out in the middle of valve body 9.

With reference to Fig. 2, grommet I 12 or grommet II 19 outline edges are dentation, and there is groove 27 on the surface.

Principle of work of the present utility model is: propulsion plant 10 promotes valve body 9 and moves on supporting track 16, will test steel pipe 25 and be inserted in the packoff, and its position-limited edge with pressure ring I II18 is contacted, and then propulsion plant 10 halts.Be that a port of four-way 24 advances low-pressure water by the low pressure mouth of a river then, after being full of low-pressure water in the experiment steel pipe 25, promoting valve core rod 3 by hoist cylinder 1 moves downward until the low pressure mouth of a river of blocking bottom, in this process, when valve core rod 3 process position transducers 2, position transducer 2 sends signal and opens high-pressure hydraulic pump, fill water under high pressure by the high pressure mouth of a river, some ray grooves that water under high pressure has through pressure ring I II18 and valve body 9 surface of contact, the groove 27 on the dentation place of grommet II 19 and surface on the cylindrical, enter sealing ring II 20 outsides, because the outer ring area of sealing ring II 20 is greater than the inner ring area, so can realize the self sealss of water under high pressure to steel pipe; In like manner, the dentation place of water under high pressure grommet I 12 on some ray grooves that pressure ring I 11 and valve body 9 surface of contact have, cylindrical and the groove 27 on surface, enter sealing ring I 13 outsides, because the outer ring area of sealing ring I 13 is greater than the inner ring area, so can realize the self sealss of water under high pressure to valve core rod 3.

Do not reveal as having in the said process, prove that experiment steel pipe 25 is normal, drive valve bodies 9 by propulsion plant 10 after the release and on supporting track 16, move backward, make experiment steel pipe 25 break away from packoffs, finish this steel pipe hydrostatic testing, wait for steel pipe material loading next time.

Claims

1. hydraulic pressure test tube packoff, comprise link (4), the top of link (4) is provided with hoist cylinder (1), the end of link 4 is valve bodies 9, one side of valve body 9 is propulsion plants 10, the centre of valve body 9 is four-way (24), opposite side is the experiment steel pipe (25) that is connected with four-way (24) one ports, it is characterized in that, be socketed with pressure ring I II (18) successively on the outer ring of experiment steel pipe (25), sealing ring II (20) and pressure ring I V (22), be pressed with grommet II (19) on the sealing ring II (20), be pressed with high-pressure seal ring III (21) on the pressure ring I V (22), and by sealing gasket (23) and compress screw (26) sealing and fixing, four-way (24) low-pressure water entrance point socket successively is provided with pressure ring I (11), sealing ring I (13) and pressure ring I I (14), be pressed with grommet I (12) on the sealing ring I (13), the outermost of pressure ring I I (14) is fixing by pressing plate (15).

2. a kind of hydraulic pressure test tube packoff according to claim 1, it is characterized in that, described link (4) is provided with orienting sleeve I (5) with the junction of valve body (9), orienting sleeve I (5) is provided with high-pressure seal ring I (6) with the junction of orienting sleeve II (8), is socketed with high-pressure seal ring II (7) on the orienting sleeve II (8).

3. a kind of hydraulic pressure test tube packoff according to claim 1 is characterized in that, described grommet I (12) and grommet II (19) outline edge are dentation, and there is groove (27) on the surface.