CN205745828U - Pipeline whirl compensator - Google Patents

Abstract

A kind of pipeline packaging type whirl compensator, including reducer pipe, seal receptacle, annular seal space set, gland and core pipe, wherein, core pipe is provided with one end of annular outer platform and extend in reducer pipe, reducer pipe, seal receptacle and gland are connected two-by-two and integral assembling is on core pipe, being provided with annular seal space set in the cavity that seal receptacle, gland and core pipe are formed, annular seal space overlaps one end and is provided with annular inner convex platform, and the other end is connected with gland by securing member.Annular outer platform, annular seal space set and seal receptacle form first annular seal space, at described annular seal space built with edge face sealing member；Annular seal space set, gland and core pipe form second annular seal space, at described annular seal space built with ring face seal.This utility model improves the utilization rate of filler, makes whirl compensator have longer service life and higher sealing reliability.

Description

Rotary compensator for pipeline

technical field

The utility model relates to a pipeline compensation technology, in particular to a rotary compensator, in particular to a packaged rotary compensator for pipelines.

Background technique

At present, as a new type of compensation device for pipeline thermal expansion, the rotary compensator has the advantages of large compensation amount, convenient installation, and low overall cost, and has been widely used in the fields of electric power, petrochemical, and heating. The typical rotary compensator structure is shown in Chinese patent ZL200610041301.4. Through the force analysis of the rotary compensator, it is found that the existing structure design is unreasonable. Low, especially the packing on the side away from the gland can't play a sealing effect at all.

Utility model content

The purpose of this utility model is to solve the problem that the changing trend of the compression force of the end face seal of the existing rotary compensator is opposite to the change of the medium pressure, which leads to the low utilization rate of the filler as the seal, and to design a method that can make the seal compress Manifold rotary compensator for pipelines whose tightening force change trend is consistent with medium pressure change.

The technical scheme of the utility model is:

A rotary compensator for pipelines, which includes a reducing tube 1, a sealing seat 2, a gland 4 and a core tube 5, and one end of the core tube 5 provided with an annular outer boss 7 protrudes into the reducing tube 1, and its characteristic The reducer tube 1, the sealing seat 2 and the gland 4 are connected in pairs and are integrally set on the core tube 5. A sealing cavity sleeve 3 is arranged in the cavity formed by the sealing seat 2, the gland 4 and the core tube 5. One end of the cavity cover 3 is provided with an annular inner boss 12, and the other end is connected to the gland 4 through a fastener 10; the first sealing cavity is formed between the annular outer boss 7, the sealing cavity cover 3 and the sealing seat 2, and the The first seal chamber described above is equipped with an end face seal 8, and the adjustment fastener 10 can adjust the size of the first seal chamber, thereby adjusting the pre-pressure of the end face seal 8; the seal chamber sleeve 3, the gland 4 and A second sealing cavity is formed between the core tubes 5, and an annular sealing member 9 is installed in the second sealing cavity.

The gland 4 is welded to the sealing seat 2 through the connecting plate 6 .

Balls 11 are installed on the ring-shaped inner boss 12 of the sealing cavity cover 3 , and at the junction between the gland 2 and the core tube 5 .

The end face seal 8 is a high temperature and high pressure resistant sealing material.

The fasteners are bolts and disc spring assemblies.

The beneficial effects of the utility model:

Due to the separation of the gland and the seal seat in the traditional rotary compensator ring surface seal structure, the change trend of the compression force is exactly opposite to the medium pressure (as shown in Figure 2), so that the packing on the side away from the gland is not fully utilized, and the sealing reliability poor. The utility model integrates the gland and the sealing seat, and the change trend of the pressing force is consistent with the medium pressure (as shown in Figure 3), so that the packing can be fully utilized, and with the increase of the medium pressure, the sealing reliability is also improved. Improve to a certain extent.

The utility model adopts two sealing structures, the first end face sealing structure has a self-sealing effect, as the pressure of the medium increases, the compression force of the end face seal rises; the second improved ring surface sealing structure also has a certain self-sealing effect. The setting of the double-layer self-sealing structure is more reasonable, the sealing effect is better, and the sealing reliability is higher.

As the volume of the end face sealing cavity of the existing rotary compensator is not adjustable, the volume of the end face sealing cavity of the utility model can be adjusted, thereby realizing the adjustment of the pretightening force.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is a stress diagram of a traditional structure packing.

Fig. 3 is a stress diagram of the filler of the present invention.

In the figure: 1-Reducing tube, 2-Seal seat, 3-Seal cavity sleeve, 4-Gland, 5-Core tube, 6-Connecting plate, 7-Ring outer boss, 8-End face seal, 9- Annular seal, 10-fastener, 11-ball, 12-annular inner boss.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

As shown in Figure 1.

An assembly-type rotary compensator for pipelines, which includes a reducing tube 1, a sealing seat 2, a gland 4 and a core tube 5, and one end of the core tube 5 provided with an annular outer boss 7 extends into the reducing tube 1 , the reducing tube 1, the sealing seat 2 and the gland 4 are connected in pairs and are integrally set on the core tube 5, wherein the gland 4 is connected to the sealing seat 2 through the connecting plate 6 by welding. In the cavity formed by the sealing seat 2, the gland 4 and the core tube 5, a sealing chamber sleeve 3 is provided, and one end of the sealing chamber sleeve 3 is provided with an annular inner boss 12, and the other end is connected to the gland 4 through a fastener 10; A first sealing cavity is formed between the annular outer boss 7, the sealing cavity cover 3 and the sealing seat 2, and an end face seal 8 is installed in the first sealing cavity, and the adjusting fastener 10 can adjust the first sealing cavity. The size of the first sealing cavity, so as to adjust the pre-pressure of the end face seal 8; the second sealing cavity is formed between the sealing cavity sleeve 3, the gland 4 and the core tube 5, and the ring surface is installed in the second sealing cavity Seal 9. Balls 11 are installed on the annular inner boss 12 of the sealing chamber sleeve 3 and the joint between the gland 2 and the core tube 5 to ensure the flexible rotation of the rotary compensator when it works. In order to ensure the sealing performance, both the end face seal 8 and the ring face seal 9 should use high temperature and high pressure resistant sealing materials, specifically flexible graphite packing rings. In order to realize the long-term operation of the product, the fastener 10 is equipped with a disc spring, which has a pre-tightening effect, and can be automatically adjusted when the packing is slightly worn and the pre-tightening force of the bolt is reduced, so as to avoid the leakage of the medium in the pipe.

When installing, first weld the reducer tube 1 and the sealing seat; The cover 4 is connected by welding through the connecting plate 6; finally, the fastener 10 is tightened to complete the overall structure.

In order to realize the mutual cooperation of the two seals, the pre-compression rate of the end face seal 8 can be moderately increased during installation, so as to ensure that the end face seal packing rebounds to fill the seal cavity when the bolts are tightened.

The parts not involved in the utility model are all the same as the prior art or can be realized by adopting the prior art.

Claims (5)

1. A rotary compensator for pipelines, which includes a reducing tube (1), a sealing seat (2), a gland (4) and a core tube (5), and the core tube (5) is provided with an annular outer boss (7 ) into the reducing tube (1), which is characterized in that the reducing tube (1), the sealing seat (2) and the gland (4) are connected in pairs and are integrally set on the core tube (5). The cavity formed by the sealing seat (2), the gland (4) and the core tube (5) is provided with a sealing cavity cover (3), and one end of the sealing cavity cover (3) is provided with an annular inner boss (12), and the other end It is connected with the gland (4) through the fastener (10); the first sealing cavity is formed between the annular outer boss (7), the sealing cavity sleeve (3) and the sealing seat (2), and the first An end face seal (8) is installed in the first seal chamber, and the size of the first seal chamber can be adjusted by adjusting the fastener (10), thereby adjusting the pre-pressure of the end face seal (8); the seal chamber sleeve (3), A second sealing cavity is formed between the gland (4) and the core tube (5), and an annular seal (9) is installed in the second sealing cavity. 2. The rotary compensator for pipelines according to claim 1, characterized in that the gland (4) is connected to the sealing seat (2) through the connecting plate (6) by welding. 3. The rotary compensator for pipelines according to claim 1, characterized in that the ring-shaped inner boss (12) of the sealing chamber sleeve (3), the gland (2) and the joint of the core tube (5) are uniform Balls (11) are installed. 4. The rotary compensator for pipelines according to claim 1, characterized in that the end face seal (8) is a high temperature and high pressure resistant sealing material. 5. The rotary compensator for pipelines according to claim 1, characterized in that said fasteners are bolts and butterfly spring assemblies.