CN209484096U - A high temperature and corrosion resistant corrugated pipe - Google Patents

Abstract

The utility model discloses a high-temperature-resistant and corrosion-resistant corrugated pipe, which comprises a corrugated pipe shell. A nut is arranged on one side of the corrugated pipe shell, and a corrugated pipe joint is installed on one side of the nut. A fixed circlip is arranged inside, an external thread is provided on the outer wall of the bellows shell, and the external thread and the bellows shell are integrally structured, and an anti-corrosion layer is arranged inside the bellows shell, and the anti-corrosion layer An adhesive is arranged on the inner wall, a polyethylene layer is arranged on the inner wall of the adhesive, a high temperature resistant layer is arranged on the inner wall of the polyethylene layer, a steel strip is arranged on the inner wall of the high temperature resistant layer, and a steel strip is arranged on the inner wall of the steel strip An adhesive resin is provided on the inner wall, a sound-absorbing layer is arranged on the inner wall of the adhesive resin, and an internal thread is arranged on the inner wall of the bellows shell. The utility model improves the heat resistance and corrosion resistance of the bellows by setting an anti-corrosion layer and a high-temperature-resistant layer on the outer wall of the bellows.

Description

A high temperature and corrosion resistant corrugated pipe

technical field

The utility model relates to the technical field of bellows, in particular to a high-temperature-resistant and corrosion-resistant bellows.

Background technique

Bellows refers to a tubular elastic sensitive element connected by foldable corrugated sheets along the direction of folding and stretching. Bellows are widely used in instruments and meters, and their main purpose is as a measuring element of a pressure measuring instrument to convert pressure into displacement or force. There are various types of bellows, mainly including metal bellows, corrugated expansion joints, corrugated heat exchange tubes, diaphragm diaphragm boxes and metal hoses. Metal bellows are mainly used to compensate pipeline thermal deformation, shock absorption, absorb pipeline settlement deformation, etc., and are widely used in petrochemical, instrumentation, aerospace, chemical, electric power, cement, metallurgy and other industries. Stainless steel corrugated pipe is installed in the liquid conveying system as a flexible pressure-resistant pipe fitting to compensate for the mutual displacement of the pipe or the connection end of the machine or equipment, absorb vibration energy, and can play the role of vibration reduction and noise reduction. It has good flexibility and light weight. , corrosion resistance, fatigue resistance, high and low temperature resistance and many other characteristics. Bellows made of plastic and other materials play an irreplaceable role in the fields of medium transportation, power threading, machine tools, and home appliances.

However, the existing bellows are easily corroded by the conveying medium after long-term use, and the heat resistance is not high; therefore, it does not meet the existing needs, and we propose a high-temperature-resistant and corrosion-resistant bellows.

Utility model content

The purpose of this utility model is to provide a high-temperature and corrosion-resistant corrugated pipe to solve the problem that the existing corrugated pipe is easily corroded by the conveying medium after long-term use and has low heat resistance.

In order to achieve the above purpose, the utility model provides the following technical solutions: a high temperature and corrosion resistant bellows, including a bellows shell, one side of the bellows shell is provided with a nut, and one side of the nut is installed with a corrugated A pipe joint, the inside of the nut is provided with a fixed spring, the outer wall of the bellows shell is provided with external threads, and the external thread and the bellows shell are integrally structured, and the inside of the bellows shell is provided with an anti-corrosion layer, the inner wall of the anti-corrosion layer is provided with an adhesive, the inner wall of the adhesive is provided with a polyethylene layer, the inner wall of the polyethylene layer is provided with a high temperature resistant layer, and the inner wall of the high temperature resistant layer is provided with A steel strip, the inner wall of the steel strip is provided with an adhesive resin, the inner wall of the adhesive resin is provided with a sound-absorbing layer, the inner wall of the bellows shell is provided with an internal thread, and the internal thread and the bellows shell are One structure.

Preferably, the bellows shell is threadedly connected to the bellows joint through a nut.

Preferably, the adhesive is disposed between the anti-corrosion layer and the polyethylene layer.

Preferably, a sealing ring is provided on one side of the fixing ring, and the sealing ring is in interference fit with the fixing ring.

Preferably, the bonding resin is arranged between the steel belt and the sound-absorbing layer.

Preferably, the center point of the bellows shell coincides with the center point of the fixed circlip.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model is equipped with a corrosion-resistant layer, which is an epoxy powder coating, which is a thermosetting powder coating with corrosion resistance and toughness, and can effectively improve the corrosion resistance of the pipe.

2. By setting a high temperature resistant layer, the high temperature resistant layer is mainly composed of glass wool, which has low thermal conductivity and good heat insulation performance, which can improve the heat resistance of the bellows.

3. By setting the sound-absorbing layer, the sound-absorbing layer is mainly composed of sound-absorbing cotton, which can reduce the noise generated during the use of the bellows, and the sound-absorbing layer is set on the inner wall of the bellows, which can avoid direct contact between the inner wall of the bellows and the air, and improves the corrugated pipe. Corrosion resistance of the inner wall of the pipe.

Description of drawings

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

Fig. 2 is a schematic diagram of the internal structure of the utility model;

Fig. 3 is a partial enlarged view of A place of the present utility model;

In the figure: 1, bellows shell; 101, anti-corrosion layer; 102, adhesive; 103, polyethylene layer; 104, high temperature resistant layer; 105, steel belt; 106, bonding resin; Cap; 3. Bellows joint; 4. Fixed circlip; 5. Seal ring; 6. External thread; 7. Internal thread.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example.

Please refer to Figure 1-3, an embodiment provided by the utility model: a high temperature and corrosion resistant bellows, including a bellows shell 1, a nut 2 is provided on one side of the bellows shell 1, and the nut 2 plays the role of The function of fixing the bellows joint 3, the bellows joint 3 is installed on one side of the nut 2, and the inside of the nut 2 is provided with a fixed circlip 4, the fixed circlip 4 makes the connection between the bellows and the bellows joint 3 more stable, The outer wall of the bellows shell 1 is provided with an external thread 6, and the external thread 6 is integrated with the bellows shell 1, and the inside of the bellows shell 1 is provided with an anti-corrosion layer 101, and the anti-corrosion layer 101 is epoxy powder coating, which can Effectively improve the corrosion resistance of the pipe, the inner wall of the anti-corrosion layer 101 is provided with an adhesive 102, the inner wall of the adhesive 102 is provided with a polyethylene layer 103, the inner wall of the polyethylene layer 103 is provided with a high temperature resistant layer 104, and the high temperature resistant layer 104 It is mainly composed of glass wool and has good heat insulation performance. A steel belt 105 is arranged on the inner wall of the high temperature resistant layer 104. The steel belt 105 enhances the ring stiffness of the bellows. The inner wall of the resin 106 is provided with a sound-absorbing layer 107, and the sound-absorbing layer 107 is mainly composed of sound-absorbing cotton, which can reduce the noise generated during the use of the bellows. The pipe shell 1 is of integral structure.

Further, the bellows shell 1 is threadedly connected with the bellows joint 3 through the nut 2, and the nut 2 plays the role of fixing the bellows shell 1 and the bellows joint 3, and by installing the bellows joint 3, the bellows can be connected with other pipes or The connection of components is more convenient.

Further, the adhesive 102 is arranged between the anti-corrosion layer 101 and the polyethylene layer 103, the adhesive 102 has played the role of fixing the anti-corrosion layer 101 and the polyethylene layer 103, and the anti-corrosion layer 101 above is epoxy powder coating, epoxy powder The coating is a thermosetting powder coating with corrosion resistance and toughness, which can effectively improve the corrosion resistance of the pipe.

Further, one side of the fixed circlip 4 is provided with a sealing ring 5, and the sealing ring 5 is in interference fit with the fixed circlip 4, the sealing ring 5 improves the sealing performance of the bellows joint 3, and ensures the airtightness of the bellows connection. sex.

Further, the adhesive resin 106 is arranged between the steel strip 105 and the sound-absorbing layer 107, and the adhesive resin 106 plays a role of fixing the steel strip 105 and the sound-absorbing layer 107, and the steel strip 105 above the adhesive resin 106 strengthens the ring of the bellows. Rigidity, the sound-absorbing layer 107 is mainly composed of sound-absorbing cotton, which can reduce the noise generated during the use of the bellows.

Further, the center point of the bellows shell 1 coincides with the center point of the fixed circlip 4, and the fixed circlip 4 can make the connection between the nut 2 on the bellows shell 1 and the bellows joint 3 more stable and prevent the nut 2 from loosening.

Working principle: When in use, the bellows joint 3 is installed on one end of the bellows through the nut 2, which makes it more convenient to connect the bellows with other pipes or components. The corrugated structure inside and outside the bellows can improve its own tensile and compressive properties , the surface of the bellows shell 1 is provided with an anti-corrosion layer 101, the anti-corrosion layer 101 is an epoxy powder coating, which is a thermosetting powder coating with corrosion resistance and toughness, which can effectively improve the corrosion resistance of the pipe, and the corrosion resistance The inner wall of the layer 101 is provided with a high temperature resistant layer 104, the high temperature resistant layer 104 is mainly composed of glass wool, the thermal conductivity of glass wool is low, the heat insulation performance is good, and the heat resistance of the bellows can be improved, the inner wall of the high temperature resistant layer 104 A steel belt 105 is provided, which enhances the ring stiffness of the bellows. The inner wall of the steel belt 105 is provided with a sound-absorbing layer 107. The sound-absorbing layer 107 is mainly composed of sound-absorbing cotton, which can reduce the noise generated during the use of the bellows.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. a kind of corrosion-and high-temp-resistant bellows, including ripple pipe shell (1), it is characterised in that: the ripple pipe shell (1) Side is provided with nut (2), and the side of the nut (2) is equipped with corrugated pipe connector (3), the inside setting of the nut (2) Have fixed circlip (4), be provided with external screw thread (6) on the outer wall of the ripple pipe shell (1), and outside external screw thread (6) and bellows Shell (1) is structure as a whole, and the ripple pipe shell (1) is internally provided with etch resistant layer (101), the etch resistant layer (101) Inner wall on be provided with adhesive (102), be provided with polyethylene layer (103) on the inner wall of the adhesive (102), the poly- second It is provided on the inner wall of alkene layer (103) high-temperature-resistant layer (104), is provided with steel band on the inner wall of the high-temperature-resistant layer (104) (105), it is provided with adhering resin (106) on the inner wall of the steel band (105), is arranged on the inner wall of the adhering resin (106) Have noise reduction layer (107), be provided with internal screw thread (7) on the inner wall of the ripple pipe shell (1), and outside internal screw thread (7) and bellows Shell (1) is structure as a whole.

2. a kind of corrosion-and high-temp-resistant bellows according to claim 1, it is characterised in that: the ripple pipe shell (1) It is threadedly coupled by nut (2) with corrugated pipe connector (3).

3. a kind of corrosion-and high-temp-resistant bellows according to claim 1, it is characterised in that: the adhesive (102) sets It sets between etch resistant layer (101) and polyethylene layer (103).

4. a kind of corrosion-and high-temp-resistant bellows according to claim 1, it is characterised in that: the fixed circlip (4) Side is provided with sealing ring (5), and sealing ring (5) and fixed circlip (4) are interference fitted.

5. a kind of corrosion-and high-temp-resistant bellows according to claim 1, it is characterised in that: the adhering resin (106) It is arranged between steel band (105) and noise reduction layer (107).

6. a kind of corrosion-and high-temp-resistant bellows according to claim 1, it is characterised in that: the ripple pipe shell (1) Centre point be overlapped with the centre point of fixed circlip (4).