CN205036990U - Wear -resistant type metallic flexible pipe - Google Patents

Abstract

The utility model discloses a wear -resistant type metallic flexible pipe, it comprises coupling, bellows, outer net cover, spring and intranet cover. Bellows envelope of hood outer net cover, bellows and outer net cover registrate back both ends oral area mutually to be connected with supporting pipe joint sealing respectively. The spring that bellows inner chamber inside lining registrated mutually, the outer wall envelope of hood intranet cover of spring, the spring and the intranet cover both ends oral area that are in the inlayer are connected with supporting pipe joint sealing equally respectively, and the constitution spring is to the protection architecture of bellows inner chamber. Supporting spring belongs to the flexible body, on the basis that increases wear resistance, does not change the flexible construction characteristic of bellows, ensures the utility model discloses it comes absorption or the displacement of compensation pipeline to have sufficient flexibility. Because the utility model discloses metal collapsible tube wear resistance and flexible matching have rationally been solved, the maintenance that significantly reduces, change number of times to the condition has been created for improving the work efficiency, saving the cost.

Description

Wear-resistant type metallic flexible pipe

Technical field

The utility model relates to a kind of pipe safety device, and specifically, the utility model relates to a kind of metallic hose for eliminating ducts internal stress, particularly a kind of metallic hose with superpower wear-resistant ability.

Background technique

Now, along with implementing of government's energy-saving and emission-reduction policy, the supporting coal fired boiler employing coal dust of the high energy consumption enterprises such as most metallurgy, cement, thermoelectricity plants is fuel, and coal dust is directly piped to the burner hearth combustion of boiler.Owing to there is larger temperature difference between defeated pulverized coal channel and boiler and neighbouring device, the internal stress problem that joint is caused because expanding with heat and contract with cold is very large.In order to pipe safety, metallic hose must be connected in series in defeated pulverized coal channel according to respective rules, utilize the flexibility of metallic hose to absorb or compensate for displacement, thus reach the object eliminating internal stress.As everyone knows, metallic hose belongs to thin walled hose, and inwall is axially concavo-convex alternate, pulverized coal flow through time except flow resistance is comparatively large, coal dust produces trace wearing and tearing to inwall male part, if continued for several weeks application must cause thin-wall metal flexible pipe to be worn through.Once there is supporting metallic hose and to be worn through accident in production scene, coal dust out of control overflows.This situation is degrading working environment on the one hand, brings safety problem on the other hand.

Model utility content

The utility model mainly for the problem that metallic hose wear resistance is not high, working life is short of prior art, propose a kind of structure simple, make and be easy to wear-resistant type metallic flexible pipe.This pipe, on the basis keeping flexible structure feature, is strengthened the protection to hose inner wall, thus is effectively improved working life.

The utility model is achieved through the following technical solutions technical goal.

Wear-resistant type metallic flexible pipe, it is made up of pipe joint, bellows, outer net, spring and interior net.Described bellows enclosure outer net cover, after bellows and outer net are nested and close, two-port portion is connected with supporting pipe seal respectively.Its improvements are: the spring of described bellows inner chamber liner phase fit.Net in the outer wall enclosure of spring, the spring being in internal layer is connected with supporting pipe seal equally respectively with interior net two-port portion, forms spring to the protection-guide structure of bellows inner chamber.

As further improvement project, described spring be a kind of steel wire close around draught spring.

As further improvement project, larger than supporting bellows wall thickness 2 ~ 4 times of described spring adapted steel wire diameter.

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

1, bellows inner lining spring structure is simple, makes easily;

2, spring is a kind of typical flexible body component, and the spring of liner does not change bellows flexible structure feature;

3, inner lining spring plays the effect that isolated pulverized coal flow directly contacts with thin-wall corrugated tube, and the steel wire diameter of spring winding is more many greatly than bellows wall thickness, and spring after heat treatment antiwear property is more excellent, and this protective layer strengthens the working life of metallic hose conscientiously.

Accompanying drawing explanation

Fig. 1 is that the utility model structure partly cuts open schematic diagram.

Fig. 2 is Figure 1A place partial structurtes schematic diagram.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in further detail.

Wear-resistant type metallic flexible pipe shown in Fig. 1 is applied on the supporting pulverized coal fired boiler of certain smelter, and it is made up of pipe joint 1, bellows 2, outer net 3, spring 4 and interior net 5.Described bellows 2 forms the main component of metallic hose, the outer net 3 of the bellows 2 outer wall enclosure made with thin plate, and after bellows 2 and outer net 3 phase fit, two-port portion is tightly connected with supporting pipe joint 2 respectively.When pulverized coal flow passes through; in order to isolated pulverized coal flow directly and the contact internal walls of bellows 2; the utility model is at the spring 4 of bellows 2 inner chamber liner phase fit; by net 5 in the spring 4 outer wall enclosure of fit; the spring 4 and the interior net 5 two ends oral area that are in bellows 2 inner chamber are tightly connected with supporting pipe joint 1 equally respectively; this structure directly forms the protection of inner lining spring 4 pairs of bellows 2 inner chambers; the pulverized coal flow of metallic hose conveying directly passes through from spring 4 inner chamber, avoids high speed pulverized coal flow to the wearing and tearing of bellows 2.In the present embodiment, the wall thickness of bellows 2 is 0.8mm, inner lining spring 4 be a kind of Φ 10mm steel wire close around draught spring.Because spring 4 is coiled into shape with low-alloy wear-resistant steel steel wire is close and does corresponding heat treatment, spring 4 wear-resisting property is improved further, the present embodiment site safety uses and adds up to surpass 2000 hours, more than prior art long service life 4 ~ 5 times.Spring 4 is a kind of typical flexible body component inherently, and inner lining spring 4, on the basis increasing wear-resisting property, does not change the flexible structure feature of bellows 2, guarantees that the utility model has enough flexibilities to absorb or compensates piping displacement.Mate with flexible because the utility model rationally solves metallic hose wear-resisting property, greatly reduce maintenance, change number of times, thus for improving work efficiency, saving cost creates condition.

Claims (3)

1. a wear-resistant type metallic flexible pipe, it is made up of pipe joint (1), bellows (2), outer net (3), spring (4) and interior net (5); The outer net (3) of described bellows (2) enclosure, after bellows (2) and outer net (3) phase fit, two-port portion is tightly connected with supporting pipe joint (1) respectively; It is characterized in that: the spring (4) of described bellows (2) inner chamber liner phase fit; Net (5) in the outer wall enclosure of spring (4), the spring (4) and interior net (5) the two ends oral area that are in internal layer are tightly connected with supporting pipe joint (1) equally respectively, form spring (4) to the protection-guide structure of bellows (2) inner chamber.

2. wear-resistant type metallic flexible pipe according to claim 1, is characterized in that: described spring (4) be a kind of steel wire close around draught spring.

3. wear-resistant type metallic flexible pipe according to claim 1 and 2, is characterized in that: described spring (4) adapted steel wire diameter is than large 2 ~ 4 times supporting of bellows (2) wall thickness.