CN203500453U

CN203500453U - Double-sealed high-temperature and high-pressure rotary compensator

Info

Publication number: CN203500453U
Application number: CN201320559164.9U
Authority: CN
Inventors: 游庆和; 张庆荣
Original assignee: JIANGSU BEST PIPELINE EQUIPMENT Co Ltd
Current assignee: JIANGSU BEST PIPELINE EQUIPMENT Co Ltd
Priority date: 2013-09-07
Filing date: 2013-09-07
Publication date: 2014-03-26
Anticipated expiration: 2023-09-07

Abstract

The utility model discloses a double-sealed high-temperature and high-pressure rotary compensator. The double-sealed high-temperature and high-pressure rotary compensator comprises an inner pipe, a packing gland, a left self-lubricating sliding bearing sealing pressing ring, a right self-lubricating sliding bearing sealing pressing ring, sealing packings, a sliding bearing centering ring, an outer pipe and an end-connecting pipe; the double-sealed high-temperature and high-pressure rotary compensator is characterized in that a double-sealed structure is arranged between the inner pipe and the outer pipe, the sliding bearing centering ring which is in clearance fit with the inner pipe and the outer pipe is arranged between opposite ends of the left sealing packing and the right sealing packing, the other ends of the left sealing packing and the right sealing filler are respectively provided with the left self-lubricating sliding bearing sealing pressing ring and the right self-lubricating sliding bearing sealing pressing ring which are closely matched with the inner pipe and the outer pipe, a left double-sealed packing cavity and a right double-sealed packing cavity are formed, and the right end of the inner pipe is provided with an anti-drop hook ring. The double-sealed high-temperature and high-pressure rotary compensator disclosed by the utility model has the advantages that the structure is simple, no pushing force is generated, the compensation amount is large, high-temperature and high-pressure resistance can be realized, the inner pipe can be prevented from dropping, the opposite rotating of the inner pipe and the outer pipe is coaxial, stable and flexible, an end surface gap and the compression area of the sealing packings can be reduced, the sealing packings are prevented from being directly flushed and damaged by a high-temperature high-pressure medium, a double-sealed effect is obtained, and the sealing performance of the double-sealed high-temperature and high-pressure rotary compensator is safer and more reliable under a high-temperature and high-pressure condition.

Description

Double-sealing High Temperature High Pressure whirl compensator

Technical field

The utility model relates to pressure piping compensator technical field, especially a kind of double-sealing High Temperature High Pressure whirl compensator.

Background technique

At present, heat distribution pipe network is in order to compensate the pipeline displacement amount that expands with heat and contract with cold, extraction duct thrust, application is whirl compensator more widely, existing known rotary compensator structure is to adopt bushing type, is provided with stuffing box packing chamber between inner and outer pipes, and stuffing box packing is put in Seal cage, by Gland press seal filler, realize sealing, but there are the following problems in High Temperature High Pressure using process:

1, between inner and outer pipes, only has single stuffing box packing chamber, under normal conditions, there is good sealing effect, but when working medium is the more severe situation of High Temperature High Pressure, stuffing box packing is subject to accelerated erosion wearing and tearing, sealingly secure coefficient is just lower, easily forms potential safety hazard.

2, the matching gap between rotary component is larger, be subject to pipeline thrust, the counterrotating poor stability of inner and outer pipes, easily produce the eccentric deflection of disalignment, thereby increased rotational resistance, reduced the flexibility of rotation compensation, also directly affected the sealability of stuffing box packing between inner and outer pipes simultaneously, cause seal failure, occur leaking.

3, the gap of two ends, stuffing box packing chamber bulge loop and rotary component is larger, causes stuffing box packing end face to have larger space, and stuffing box packing end face compression area is larger, and under the direct erosion damage of high-temperature high-pressure medium, this gap easily produces leakage.

For addressing the above problem, prior art conventionally adopts, on the existing anchor ring packing seal of compensator basis, end face packing seal is set again, or pressure injection head filling flexible gasket is installed in shell outside and is improved sealability, the steel ball of usining is controlled the coaxial rotation of inner and outer pipes as rolling bearing as rolling friction pair, obviously this has all increased the difficulty of structural complexity and production and processing, moreover steel ball bearing load is little, easy to wear, easily damaged by pressure, so do not solve the problem of above-mentioned existence completely.

Model utility content

The purpose of this utility model is exactly the problem existing for prior art, the manufacture method of a kind of double-sealing High Temperature High Pressure whirl compensator and this compensator is proposed, this compensator has simple in structure, without thrust, compensation rate is large, high temperature high voltage resistant, inner tube anticreep, the relative rotating coaxial of inner and outer pipes, stable, flexibly, there is again the stuffing box packing end face space of minimizing and compression area, stop the direct erosion damage of high-temperature high-pressure medium to stuffing box packing, have more double sealing structure, realize double-sealing dual fail-safe, make compensator sealability safety and reliability under High Temperature High Pressure mal-condition.

The technical solution of the utility model is: double-sealing High Temperature High Pressure whirl compensator, comprises inner tube, Gland, bolt assembly, left self-lubricating plain bearing seal joint, left stuffing box packing, sliding bearing centering ring, right stuffing box packing, right self-lubricating plain bearing seal joint, outer tube and pipe nipple, is characterized in that arranging double sealing structure between inner and outer tubes, and a left side is specifically housed between inner and outer tubes, right stuffing box packing, a left side, sliding bearing centering ring is set, a left side between the opposite end of right stuffing box packing, the other end of right stuffing box packing arranges respectively a left side, right self-lubricating plain bearing seal joint, forms left and right double-sealing packing cavity, and sliding bearing centering ring and inner and outer pipes are less Spielpassung, a left side, right self-lubricating plain bearing seal joint and inner and outer pipes be for closely cooperating, and it is fastening that Gland and outer tube are connected by bolt assembly, and by left, right self-lubricating plain bearing seal joint and sliding bearing centering ring are by a left side, right stuffing box packing together interlock compresses, and realizes the coaxial stable phase of two-chamber filler effective sealing and inner and outer pipes to rotation, when pipe nipple and outer tube right-hand member internal surface are tightly connected, internally pipe forms axial limiting.

Further technological scheme is: inner tube right-hand member is provided with outer bulge loop as anticreep shackle, outer bulge loop left end shaft is circular arc to cross section, in rolling friction pair, be line contact, for improving contact surface bearing capacity and abrasive resistance, surperficial cure process is carried out in the outer bulge loop left side of inner tube and outer tube internal projecting ring right side.Above-mentioned double-sealing High Temperature High Pressure rotary compensator structure is also applicable to common whirl compensator.

The utility model compared with prior art, has following beneficial effect:

1, simple in structure, easily manufactured.

2, two stuffing box packing chambeies, double sealing structure left and right are set between inner and outer pipes, have played secondary seal effect, form double-sealing, dual fail-safe, product is used under high-temperature and high-pressure conditions safer, reliable.

3, the sliding bearing centering ring that it is less Spielpassung that the opposite end of left and right stuffing box packing arranges with inner and outer pipes, it is close-fitting self-lubricating plain bearing seal joint that the other end of left and right stuffing box packing arranges respectively with inner and outer pipes, solved the larger problem of matching gap between rotary component, and make rotary component axially, radial direction has three guiding sliding bearings of diverse location all the time simultaneously, three guiding fulcrums are as reliable rotation positioning supports, both guaranteed the concentricity between inner and outer pipes, guaranteed again the counterrotating stability of inner and outer pipes, flexibility, while sliding bearing centering ring, left and right self-lubricating plain bearing seal joint is again as the seal joint of both sides, stuffing box packing chamber, left and right, solved the problem that the bulge loop of both sides, stuffing box packing chamber and inner and outer pipes matching gap are larger, thereby stuffing box packing end face space and compression area have been reduced to greatest extent, stopped the direct erosion damage of high-temperature high-pressure medium to stuffing box packing, sealability and the working life of left and right stuffing box packing have greatly been improved.

4, the sliding bearing centering ring axial position between the stuffing box packing of left and right floats, and can interlock adjusts the stuffing box packing of both sides, makes the sealing configuration sealability of both sides consistent, and sealing effect is complementary.

5, inner tube right-hand member is provided with anticreep shackle, makes product safety performance more reliable, and anticreep shackle left end cross section is semicircle, in pivoting friction pair, be line contact, steel ball bearing capacity than some contact is strong, and contact surface is through cure process, and its bearing capacity and abrasive resistance further improve.

Accompanying drawing explanation

Accompanying drawing 1 is structural representation of the present utility model.

Embodiment

The utility model is described in further detail in conjunction with specific embodiments with reference to the accompanying drawings below.

As shown in Figure 1, high-temperature and pressure pipeline whirl compensator, comprises inner tube 1, Gland 2, bolt assembly 3, left self-lubricating plain bearing seal joint 4, left stuffing box packing 5, sliding bearing centering ring 6, right stuffing box packing 7, right self-lubricating plain bearing seal joint 8, outer tube 9 and pipe nipple 10.Between described inner tube 1 and outer tube 9, be provided with double sealing structure, specifically between inner tube 1 and outer tube 9, a left side is housed, right

stuffing box packing

5 and 7, left, between right

stuffing box packing

5 and 7 opposite end, sliding bearing centering ring 6 is set, left, right

stuffing box packing

5 and 7 the other end arrange respectively a left side, right self-lubricating plain bearing

seal joint

4 and 8, form left and right double-sealing packing cavity, described inner tube 1 is provided with an outer bulge loop 11 as anticreep shackle near the outer surface of right-hand member, outer bulge loop 11 left end axial cross sections are arc surface, described outer tube 9 outer surface left ends are provided with a male end flange, the internal surface section of taking over is provided with an internal projecting ring, described pipe nipple 10 outer surface left ends are provided with an evagination end ring.

Inner tube 1 left end is coaxially inserted fit from outer tube 9 right-hand members, the outer bulge loop of inner tube 1 left side terminates in outer tube 9 internal projecting ring right sides, between the left end outer surface of inner tube 1 and the left end internal surface of outer tube 9, be set with successively or fill in and fill right self-lubricating plain bearing seal joint 8, right stuffing box packing 7, sliding bearing centering ring 6, left stuffing box packing 5, left self-lubricating plain bearing seal joint 4, Gland 2 also terminates in the left side of outer tube 9 internal projecting rings, Gland 2 is connected fastening with outer tube 9 by bolt assembly 3, and by left, right self-lubricating plain bearing

seal joint

4 and 8, sliding bearing centering ring 6 is by a left side, right stuffing box packing 5 interlock together with 7 compresses, guarantee that inner tube 1 and outer tube 9 are coaxial simultaneously, realize left and right two-chamber filler effective sealing and the coaxial stable phase of inner and outer pipes to rotation.

Described pipe nipple 10 is tightly connected and forms axial limiting inner tube 1 simultaneously with outer tube 9 right-hand member internal surfaces, and inner tube 1 right side and pipe nipple 10 spaces, left side are 3-6mm.

Described in the present embodiment, left and right self-lubricating plain bearing

seal joint

4 and 8 material are graphite, and left and right

stuffing box packing

5 and 7 materials are flexible graphite stuffing, also can or fill in formula stuffing box packing for non-forming seal filler.

Claims

1. a double-sealing High Temperature High Pressure whirl compensator, comprise inner tube (1), Gland (2), bolt assembly (3), left self-lubricating plain bearing seal joint (4), left stuffing box packing (5), sliding bearing centering ring (6), right stuffing box packing (7), right self-lubricating plain bearing seal joint (8), outer tube (9) and pipe nipple (10), it is characterized in that: between described inner tube (1) and outer tube (9), be provided with double sealing structure, this structure is specifically provided with left stuffing box packing (5) and right stuffing box packing (7) between inner tube (1) and outer tube (9), a described left side, between right stuffing box packing (5) and the opposite end of (7), sliding bearing centering ring (6) is set, the other end of described left stuffing box packing (5) is provided with left self-lubricating plain bearing seal joint (4), the other end of right stuffing box packing (7) is provided with right self-lubricating plain bearing seal joint (8), and form respectively left, right double-sealing packing cavity, described sliding bearing centering ring (6) is made as Spielpassung with inner tube (1), outer tube (9), and left and right self-lubricating plain bearing seal joint (4) and (8) are made as and closely cooperate with inner tube (1), outer tube (9).

2. double-sealing High Temperature High Pressure whirl compensator according to claim 1, is characterized in that: described inner tube (1) is provided with an outer bulge loop (11) as anticreep shackle near the outer surface of right-hand member.

3. double-sealing High Temperature High Pressure whirl compensator according to claim 2, is characterized in that: described outer bulge loop (11) left end axial cross section is made as arc surface.

4. double-sealing High Temperature High Pressure whirl compensator according to claim 1 and 2, it is characterized in that: described outer tube (9) outer surface left end is provided with a male end flange, the internal surface section of taking over is provided with an internal projecting ring, and described pipe nipple (10) outer surface left end is provided with an evagination end ring.

5. double-sealing High Temperature High Pressure whirl compensator according to claim 1, it is characterized in that: described pipe nipple (10) is straight tube structure or reducer pipe structure, the reducing extending part of described reducer pipe structure is made as straight length, to connect with Pipeline butt and carry out weldquality detection.