Corrugated pipe with limiting structure

Abstract

The corrugated pipe with the limiting structure comprises a corrugated pipe body, a limiting pipe, a fixing ring and a spring, the limiting pipe is arranged in an inner cavity of the corrugated pipe body, an interlayer is arranged between the corrugated pipe body and the limiting pipe, a compression resisting ring is arranged on the outer surface of the limiting pipe, and the spring is arranged on the inner surface of the compression resisting ring. Wherein a groove is formed in the inner surface of one group of pipe orifices, and a convex pipe is arranged on the right end face of the other group of pipe orifices. According to the corrugated pipe with the limiting structure, when the corrugated pipe deforms, the limiting pipe is arranged in the corrugated pipe body, so that the deformation range of the corrugated pipe is effectively limited, the limiting effect is achieved, it is guaranteed that the corrugated pipe cannot be excessively stretched or compressed in the using process, and therefore the shape and the structure of the corrugated pipe are kept stable, and the limiting purpose is achieved; the deformation range of the corrugated pipe is limited through the fixing ring and the spring which are connected to the outer surface of the limiting pipe in a sleeving mode, partial stress caused by thermal expansion is absorbed, the shape stability of the corrugated pipe is kept, and therefore the limiting effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a bellows with a limiting structure. Background Art

[0002] Bellows refers to a tubular elastic sensitive element connected by foldable corrugated sheets along the folding and stretching direction. Bellows are widely used in instruments and meters. Their main purpose is to be used as a measuring element of pressure measuring instruments to convert pressure into displacement or force. The wall of the bellows is thinner and the sensitivity is higher. The measuring range is from tens of Pa to tens of MPa. Its open end is fixed, the sealed end is in a free state, and an auxiliary spiral spring or reed is used to increase the elasticity. When working, it stretches along the length of the tube under the action of internal pressure, causing the movable end to produce a displacement that is related to the pressure.

[0003] For example, the patent document with application number 202020243381.7 discloses a novel bellows limiting structure, comprising a bellows body, a first mounting plate, a second mounting plate, a metal shaped hose and a fixing rod, wherein the left end of the bellows body is provided with a first mounting plate, the right end of the bellows body is provided with a second mounting plate, a silicone sleeve is provided on the outside of the bellows body, a high-density polyethylene layer is provided on the outside of the silicone sleeve, a steel belt protective layer is provided on the outside of the high-density polyethylene layer, a metal shaped hose is distributed on the outside of the bellows body, a fixing rod is provided on the outside of the metal shaped hose, a fixing sleeve is sleeved on the left end of the fixing rod, a bolt limiting block is welded on the left end of the fixing sleeve, and a limiting baffle is welded on the left end of the fixing rod to buffer and reduce shock, avoid compression damage, provide safety protection, extend service life, and arbitrarily adjust the fixing shape to facilitate the limiting and fixing of the bellows, so that the fixation is more stable, the limiting is safe, the installation is tight, and the novelty is high.

[0004] Similar to the bellows limiting structure, the bellows will be affected by factors such as the pressure and temperature changes of the external and internal media during use, and is prone to excessive stretching or compression deformation. During operation, it will also undergo thermal expansion due to changes in the medium temperature, generating stress, which will cause the bellows to be subjected to excessive force or even damage.

[0005] Therefore, in view of this, the shortcomings of the existing structure are studied and improved, and a bellows with a limiting structure is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a bellows with a limiting structure. The bellows will be affected by factors such as the pressure and temperature changes of the external and internal media during use, and is prone to excessive stretching or compression deformation. During operation, thermal expansion will occur due to changes in the medium temperature, generating stress, which will cause the bellows to be subjected to excessive force or even damage.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bellows with a limiting structure, comprising a bellows body, a limiting tube, a fixing ring and a spring, wherein pipe openings are arranged at both ends of the bellows body, the limiting tube is arranged in the inner cavity of the bellows body, an interlayer is arranged between the bellows body and the limiting tube, the anti-pressure ring is arranged on the outer surface of the limiting tube, the fixing ring is arranged in two groups, the spring is arranged on the inner surface of the anti-pressure ring, the spring is arranged in four groups, an elastic steel bar is arranged on the inner surface of the limiting tube, and several groups of the elastic steel bars are arranged, one group of the pipe openings has a groove on the inner surface, and the other group of the pipe openings has a convex tube on the right end surface, and the outer surfaces of the two groups of pipe openings are both provided with connecting flanges, the inner cavity of the connecting flanges is provided with connecting holes, the connecting openings are provided in several groups, and mounting plates are arranged on both sides of the two groups of connecting flanges.

[0008] Furthermore, each two groups of the mounting plates are connected by bolts, and the outer surface of the bolts protruding from one end of one group of the mounting plates is sleeved with nuts, and the bolts are meshed with the nuts.

[0009] Furthermore, two ends of the limiting tube are respectively connected to two groups of the pipe openings, and several groups of the elastic steel bars are arranged in an equidistant manner.

[0010] Furthermore, reinforcement rings are installed between the corrugations on the outer surface of the corrugated tube body, and the reinforcement rings are provided in several groups.

[0011] Furthermore, the apertures of the convex tube and the concave groove are equal, and the convex tube and the concave groove are meshed with each other.

[0012] Furthermore, the four groups of springs are arranged at equal intervals on the inner surface of the anti-compression ring, and one end of the opposite surface of the spring abuts against the outer surface of the limiting tube.

[0013] Compared with the prior art, the utility model has the following beneficial effects: when the bellows is deformed, the deformation range of the bellows is effectively limited by arranging a limit tube inside the bellows body, which plays a role of limiting, ensuring that the bellows will not be overstretched or compressed during use, thereby maintaining the shape and structure of the bellows stable, achieving the purpose of limiting, and limiting the deformation range of the bellows by means of a fixing ring and a spring sleeved on the outer surface of the limit tube, absorbing part of the stress caused by thermal expansion, maintaining the shape of the bellows stable, thereby playing a role of limiting, and the specific contents are as follows:

[0014] A limit tube and an elastic steel bar are provided. By providing the limit tube inside the bellows body, the extension range and compression range of the bellows can be effectively limited to prevent the bellows from over-extension and over-compression when subjected to external pressure, thereby maintaining the shape and structural stability of the bellows and preventing the bellows from being easily deformed when subjected to pressure. The elastic steel bar has a certain buffering and shock-absorbing effect, which can absorb the vibration or impact of the limit tube, thereby improving the compressive resistance of the limit tube and maintaining the integrity of the bellows.

[0015] A fixing ring and a spring are provided, and the spring is arranged between the bellows body and the limit tube. The elastic action of the spring can increase the flexibility of the bellows, making it easier to adapt to changes in pressure and operating conditions. When the bellows is subjected to external force, the spring absorbs the thermal stress generated by the bellows when the temperature changes, reduces the risk of deformation of the bellows, and plays a buffering role, reducing the stress concentration of the bellows and improving the durability of the bellows. The fixing ring fixes the spring to prevent the spring from loosening during the force application process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a corrugated pipe with a limiting structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the front cross-section structure of a corrugated pipe with a limiting structure according to the utility model;

[0018] Figure 3 It is a side view structural schematic diagram of a compression ring of a bellows with a limiting structure according to the utility model;

[0019] Figure 4 The utility model is a corrugated pipe with a limiting structure Figure 2 Schematic diagram of the local enlarged structure at A in the figure.

[0020] In the figure: 1. corrugated pipe body; 2. pipe mouth; 3. interlayer; 4. limit pipe; 5. compression ring; 6. spring; 7. elastic steel bar; 8. connecting flange; 9. connecting hole; 10. convex pipe; 11. groove; 12. reinforcement ring; 13. mounting plate; 14. bolt; 15. nut. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] like Figures 1 to 4As shown, a bellows with a limiting structure includes a bellows body 1, a limiting tube 4, a pressure-resistant ring 5 and a spring 6. Both ends of the bellows body 1 are provided with pipe openings 2. The bellows body 1 is a main pressure-bearing component. Its corrugated structure can be elastically deformed when subjected to pressure, playing a role in buffering and absorbing pressure. The pipe opening 2 provides a connecting channel. The limiting tube 4 is arranged in the inner cavity of the bellows body 1. The function of the elastic steel strip 7 is to limit the extension and compression range of the bellows body 1 and keep the shape of the bellows stable. An interlayer 3 is arranged between the bellows body 1 and the limiting tube 4. The inner surface of the limiting tube 4 is provided with an elastic steel strip 7. The elastic steel strip 7 is provided with a plurality of The two ends of the limit tube 4 are respectively connected to the two groups of pipe openings 2 to ensure the tight connection between the limit tube 4 and the two groups of pipe openings 2. Several groups of elastic steel bars 7 are arranged in an equidistant manner. The elastic steel bars 7 have a certain buffering and shock-absorbing effect, which can absorb the limit tube 4 when it is subjected to vibration or impact, thereby improving the pressure resistance of the limit tube 4. Reinforcement rings 12 are installed between the corrugations on the outer surface of the corrugated tube body 1. Several groups of reinforcement rings 12 are provided. The reinforcement rings 12 provide tension connection between several corrugations of the corrugated tube body 1, effectively increasing the stability and pressure resistance of the corrugated tube body 1, and preventing the corrugated tube from being excessively deformed or ruptured when subjected to external pressure.

[0023] The anti-compression ring 5 is arranged on the outer surface of the limiting tube 4, and two groups of anti-compression rings 5 ​​are arranged. The anti-compression ring 5 limits and fixes the spring 6 to prevent the spring 6 from loosening during the force application process. The spring 6 is arranged on the inner surface of the anti-compression ring 5, and four groups of springs 6 are arranged on the inner surface of the anti-compression ring 5 in an equidistant manner. One end of the opposite surface of the spring 6 abuts against the outer surface of the limiting tube 4. The function of the spring 6 is to provide additional support and stability to prevent the limiting tube 4 from excessive deformation or rupture when subjected to external pressure. The setting of the spring 6 can absorb part of the pressure when the limiting tube 4 is squeezed, thereby reducing the impact on other components.

[0024] A groove 11 is provided on the inner surface of one group of pipe nozzles 2, and the groove 11 provides a limiting space for the convex tube 10 and increases the contact area of ​​the connection. A convex tube 10 is provided on the right end surface of the other group of pipe nozzles 2. The apertures of the convex tube 10 and the groove 11 are equal, and the convex tube 10 and the groove 11 are meshed with each other. The meshing between the convex tube 10 and the groove 11 can effectively prevent the loosening and falling off of the connection. A stable complementary connection is formed between them, so that the two groups of components of the pipe nozzle 2 can be firmly fixed together, and the outer surfaces of the two groups of pipe nozzles 2 are provided with connecting flanges 8, and the inner cavity of the connecting flanges 8 is provided with connecting holes 9. The connecting holes 9 are provided in a plurality of groups, and the connecting flanges 8 are connected to the pipe body of the external equipment through the connecting holes 9;

[0025] Mounting plates 13 are provided on both sides of the two groups of connecting flanges 8. The mounting plates 13 are used to limit the movement of the bellows in the torsional direction to prevent the bellows from being damaged due to torsion. The design of the mounting plates 13 can increase the stability and bearing capacity of the connecting flanges 8. Every two groups of mounting plates 13 are connected by bolts 14. The bolts 14 protrude from the outer surface of one end of one group of mounting plates 13 and are sleeved with nuts 15. The bolts 14 are meshed with the nuts 15. The bolts 14 are used to connect the two groups of mounting plates 13. The connecting flanges 8 are fixed by passing through the holes of the mounting plates 13. The nuts 15 are meshed with the bolts 14 to fix the bolts 14 between the two groups of mounting plates 13. By adjusting the position of the nuts 15, the tightening force of the bolts 14 can be flexibly controlled to adapt to different working environments and requirements.

[0026] In summary, if Figures 1 to 4 As shown, the bellows with a limiting structure, when the bellows body 1 is subjected to external pressure, the bellows body 1 will undergo elastic deformation, the elastic steel bar 7 enhances the anti-deformation strength of the limiting tube 4, and maintains the shape stability of the bellows, the interlayer 3 absorbs part of the vibration and impact force, reduces the impact on other components of the system, and reduces external vibration and impact, the reinforcement ring 12 provides tension connection between the corrugations of the bellows body 1, and the external pressure can be effectively dispersed through the support and tension connection of the reinforcement ring 12;

[0027] At the same time, the spring 6 can absorb part of the pressure, reduce the impact of external impact on the limiting tube 4, and prevent the limiting tube 4 from excessive deformation or rupture. The anti-compression ring 5 and the spring 6 act together on the limiting tube 4 to provide double support and protection. When several groups of corrugated tubes need to be connected, the convex tube 10 and the groove 11 are engaged with each other to form a stable connection between them, so that the two groups of components of the pipe mouth 2 can be firmly fixed together for limiting when connected. The connecting flange 8 is connected to other components or the pipe body through the connecting hole 9. The nut 15 is engaged with the bolt 14 to fix the bolt 14 between the two groups of mounting plates 13. The nut 15 is adjusted by rotating to control the tightening force of the bolt 14 to withstand the torque caused by different torsion directions.

Claims

1. A bellows with a limiting structure, comprising a bellows body (1), a limiting tube (4), a pressure-resistant ring (5) and a spring (6), characterized in that: The two ends of the bellows body (1) are provided with pipe openings (2); the limiting tube (4) is arranged in the inner cavity of the bellows body (1); an interlayer (3) is arranged between the bellows body (1) and the limiting tube (4); the anti-pressure ring (5) is arranged on the outer surface of the limiting tube (4); two groups of the anti-pressure ring (5) are provided; the spring (6) is arranged on the inner surface of the anti-pressure ring (5); four groups of the spring (6) are provided; the inner surface of the limiting tube (4) is provided Elastic steel bars (7), wherein the elastic steel bars (7) are arranged in a plurality of groups, wherein the inner surface of the pipe mouth (2) of one group is provided with a groove (11), and the right end surface of the pipe mouth (2) of the other group is provided with a convex tube (10), and the outer surfaces of the two groups of pipe mouths (2) are provided with connecting flanges (8), the inner cavity of the connecting flanges (8) is provided with connecting holes (9), and the connecting holes (9) are arranged in a plurality of groups, and mounting plates (13) are arranged on both sides of the two groups of connecting flanges (8).

2. The corrugated pipe with a limiting structure according to claim 1, characterized in that: Each two groups of the mounting plates (13) are connected by bolts (14). The outer surface of the bolts (14) protruding from one end of one group of the mounting plates (13) is sleeved with nuts (15), and the bolts (14) and the nuts (15) are meshed with each other.

3. The corrugated pipe with a limiting structure according to claim 1, characterized in that: The two ends of the position limiting tube (4) are respectively connected to the two groups of pipe openings (2), and a plurality of groups of elastic steel bars (7) are arranged in an equidistant manner.

4. The corrugated pipe with a limiting structure according to claim 1, characterized in that: Reinforcement rings (12) are installed between the corrugations on the outer surface of the corrugated tube body (1), and the reinforcement rings (12) are provided in a plurality of groups.

5. The corrugated pipe with a limiting structure according to claim 1, characterized in that: The apertures of the convex tube (10) and the concave groove (11) are equal in size, and the convex tube (10) and the concave groove (11) are meshed with each other.

6. The corrugated pipe with a limiting structure according to claim 1, characterized in that: Four groups of springs (6) are arranged at equal intervals on the inner surface of the anti-pressure ring (5), and one end of the opposite surface of the spring (6) is in contact with the outer surface of the limiting tube (4).

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