Pressure-resistant hose and pressure-resistant hose assembly

Abstract

The utility model belongs to the field of hoses, and particularly relates to a pressure-resistant hose and a pressure-resistant hose assembly. In order to avoid rapid failure of the pressure-resistant hose after the outer protective layer is damaged, the pressure-resistant hose comprises a metal corrugated pipe layer and the outer protective layer located outside the metal corrugated pipe layer, the metal corrugated pipe layer comprises a metal corrugated pipe, each wave crest of the metal corrugated pipe is in close contact with the inner wall of the outer protective layer, and the outer protective layer is located outside the metal corrugated pipe layer. The metal corrugated pipe layer further comprises sealing rings arranged outside all wave troughs of the metal corrugated pipe in a sleeving mode, and the sealing rings outside all the wave troughs are extruded and make close contact with the inner wall of the outer protection layer. The utility model further discloses a pressure-resistant hose assembly comprising the pressure-resistant hose. In the using process, when the outer protective layer is damaged, seawater enters the metal corrugated pipe layer from the crevasse, the sealing rings on the two axial sides of the crevasse can prevent the seawater from spreading in the metal corrugated pipe layer, and the whole metal corrugated pipe is prevented from being crushed.

Description

Technical Field

[0001] The utility model belongs to the field of hoses, in particular to a pressure-resistant hose and a pressure-resistant hose assembly. Background Art

[0002] In underwater operation equipment, a hose with a pipe joint installed at the end is needed to transport objects, such as Figure 1-2 As shown, the conventional hose consists of an inner liner 1, a metal bellows layer 2, and an outer protective layer 3. The metal bellows layer 2 is used to withstand internal and external pressures. The inner liner 1 is sealed to the pipe joint to isolate the metal bellows layer 2 from objects within the hose, preventing them from corroding the metal bellows in the metal bellows layer 2. The outer protective layer 3 is sealed to the pipe joint to isolate the metal bellows layer 2 from seawater, preventing seawater from corroding the metal bellows.

[0003] Specifically, the metal bellows has crests and troughs. The crests are in contact with the outer protective layer 3 so that the pressure of the seawater is transferred to the metal bellows through the outer protective layer 3, so that the metal bellows withstands external pressure; the troughs are in contact with the inner lining layer 1 so that the pressure of the objects in the hose is transferred to the metal bellows through the outer protective layer 3, so that the metal bellows withstands internal pressure.

[0004] like Figure 1 As shown, when the hose is used at a shallow depth, if the outer protective layer 3 is damaged, seawater will enter through the rupture 4 between the outer protective layer 3 and the metal bellows, causing the metal bellows to be corroded by the seawater. Because seawater corrosion of metal bellows takes a long time, workers should regularly check the hose for damage and replace any damaged hoses promptly.

[0005] With the development of underwater technology, underwater equipment can operate at greater depths. When the above-mentioned hose is used at greater depths, once the outer protective layer 3 is damaged, seawater will enter through the rupture 4 between the outer protective layer 3 and the metal bellows. Unlike when the hose is used at shallow depths, the water pressure at greater depths directly acts on the entire metal bellows, causing deformation. This deformation accumulates, causing the seawater to crush the entire metal bellows in a short period of time, causing the hose to fail in a short period of time. Utility Model Content

[0006] The purpose of the utility model is to provide a pressure-resistant hose to solve the technical problem that when the existing hose is at a deep position, once the outer protective layer is damaged, the entire metal bellows will be crushed in a short time, thereby causing the hose to fail.

[0007] The purpose of the utility model is to provide a pressure-resistant hose assembly to solve the same technical problem as above.

[0008] To achieve the above objectives, the technical solution of the pressure-resistant hose provided by the present invention is:

[0009] A pressure-resistant hose comprises a metal bellows layer and an outer protective layer located outside the metal bellows layer. The metal bellows layer comprises a metal bellows, and each crest of the metal bellows is in close contact with the inner wall of the outer protective layer. The metal bellows layer also comprises a sealing ring sleeved on the outside of each trough of the metal bellows, and the sealing ring outside each trough is squeezed and in close contact with the inner wall of the outer protective layer.

[0010] Furthermore, the metal bellows includes an arc-shaped trough portion located at the trough position, an arc-shaped peak portion located at the peak position, and a connecting wall connected between the arc-shaped trough portion and the arc-shaped peak portion. The connecting wall is a plane wall perpendicular to the axis of the metal bellows, and each sealing ring is squeezed between the connecting walls on both sides.

[0011] Furthermore, a reinforcement layer for withstanding internal pressure is provided between the inner lining layer and the metal bellows layer of the pressure-resistant hose.

[0012] Furthermore, the reinforcement layer is a wound steel wire layer.

[0013] Furthermore, the inner lining layer of the pressure-resistant hose is a polytetrafluoroethylene inner layer.

[0014] Furthermore, the outer protective layer includes a heat shrinkable tube layer and a corrosion-resistant wear-resistant layer located outside the heat shrinkable tube layer. Each wave crest and each sealing ring of the metal bellows are in close contact with the heat shrinkable tube layer.

[0015] The beneficial effects of the pressure-resistant hose provided by the present invention are as follows: the present invention is an improved invention. A sealing ring is installed on the outside of each trough of the metal bellows, and the sealing ring outside each trough is squeezed by the outer protective layer and the metal bellows, thereby sealing the bellows in sections. During use, when the outer protective layer is damaged, seawater enters the metal bellows layer from the breach, and the sealing rings on both axial sides of the breach can prevent seawater from spreading in the metal bellows layer, so that the pressure of the seawater only acts on a small section of the metal bellows corresponding to the damaged part. At this time, only the corresponding small section of the metal bellows undergoes a slight deformation, preventing the entire metal bellows from being crushed, thereby allowing the metal bellows to continue to work for a long period of time, preventing the pressure-resistant hose from failing in a short period of time. Before the pressure-resistant hose fails, the staff can take appropriate emergency operations.

[0016] At the same time, compared with the existing technology in which only a metal bellows is provided in the metal bellows layer, the sealing ring can transmit the external pressure exerted on the outer protective layer to the trough through the sealing ring, thereby increasing the contact area between the outer protective layer and the metal bellows layer, reducing the pressure exerted on the crest of the metal bellows, avoiding the pressure concentration at the crest and causing the metal bellows to break at the trough, improving the external pressure resistance of the metal bellows layer, and thus improving the external pressure resistance of the pressure-resistant hose.

[0017] To achieve the above objectives, the technical solution of the pressure-resistant hose assembly provided by the present invention is:

[0018] A pressure-resistant hose assembly includes a pressure-resistant hose and a pipe joint installed at the end of the pressure-resistant hose. The pressure-resistant hose includes a metal bellows layer and an outer protective layer located outside the metal bellows layer. The metal bellows layer includes a metal bellows, and each crest of the metal bellows is in close contact with the inner wall of the outer protective layer. The metal bellows layer also includes a sealing ring sleeved on the outside of each trough of the metal bellows, and the sealing ring outside each trough is squeezed and in close contact with the inner wall of the outer protective layer.

[0019] Furthermore, the metal bellows includes an arc-shaped trough portion located at the trough position, an arc-shaped peak portion located at the peak position, and a connecting wall connected between the arc-shaped trough portion and the arc-shaped peak portion. The connecting wall is a plane wall perpendicular to the axis of the metal bellows, and each sealing ring is squeezed between the connecting walls on both sides.

[0020] Furthermore, a reinforcement layer for withstanding internal pressure is provided between the inner lining layer and the metal bellows layer of the pressure-resistant hose.

[0021] Furthermore, the reinforcement layer is a wound steel wire layer.

[0022] Furthermore, the inner lining layer of the pressure-resistant hose is a polytetrafluoroethylene inner layer.

[0023] Furthermore, the pressure-resistant hose assembly also includes a crimping section, a part of the pipe joint is inserted into the inner lining layer of the pressure-resistant hose, the crimping section is crimped on the pipe joint and the outer protective layer at the same time, and one end of the crimping section is welded and sealed to the pipe joint, and more than two annular sealing gaskets are arranged between the crimping section and the outer protective layer.

[0024] Furthermore, the outer protective layer includes a heat shrinkable tube layer and a corrosion-resistant wear-resistant layer located outside the heat shrinkable tube layer. The wave peaks and sealing rings of the metal bellows are in close contact with the heat shrinkable tube layer; the ends of the heat shrinkable tube layer, the metal bellows layer and the inner lining layer all protrude from the wear-resistant layer, and the part of the buckling section buckled on the outer protective layer is buckled on the heat shrinkable tube layer.

[0025] Furthermore, the end of the heat shrink tube layer protrudes from the metal bellows layer and the inner lining layer, and the pipe joint includes a first shaft segment for the metal bellows layer and the inner lining layer to be sleeved and a second shaft segment for the end of the heat shrink tube layer to be sleeved, and the end faces of the metal bellows layer and the inner lining layer abut against the step surface between the first shaft segment and the second shaft segment.

[0026] The beneficial effects of the pressure-resistant hose assembly provided by the present invention are as follows: the present invention is an improved invention. A sealing ring is installed on the outside of each trough of the metal bellows, and the sealing ring on the outside of each trough is squeezed between the outer protective layer and the metal bellows, thereby sealing the bellows in sections. During use, when the outer protective layer is damaged, seawater enters the metal bellows layer from the breach. The sealing rings on both axial sides of the breach can prevent seawater from spreading in the metal bellows layer, so that the pressure of the seawater only acts on a small section of the metal bellows corresponding to the damaged part, avoiding the continuous accumulation of deformation of the metal bellows. At this time, only the corresponding small section of the metal bellows undergoes a slight deformation, avoiding the entire metal bellows from being crushed, thereby allowing the metal bellows to continue to work for a long period of time, avoiding the failure of the pressure-resistant hose in a short period of time. Before the pressure-resistant hose fails, the staff can take appropriate emergency operations.

[0027] At the same time, compared with the existing technology in which only a metal bellows is provided in the metal bellows layer, the sealing ring can transmit the external pressure exerted on the outer protective layer to the trough through the sealing ring, thereby increasing the contact area between the outer protective layer and the metal bellows layer, reducing the pressure exerted on the crest of the metal bellows, avoiding the pressure concentration at the crest and causing the metal bellows to break at the trough, improving the external pressure resistance of the metal bellows layer, and thus improving the external pressure resistance of the pressure-resistant hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of a hose in the prior art;

[0029] Figure 2 for Figure 1 CC cross-section diagram;

[0030] Figure 3 This is a schematic structural diagram of a pressure-resistant hose assembly of the present invention;

[0031] Figure 4 for Figure 3 A magnified view of the structure at point A;

[0032] Figure 5 for Figure 3 BB cross-section diagram in;

[0033] Figure 6 This is a schematic diagram of the structure of the pressure-resistant hose assembly of the present invention after the heat shrinkable tube layer and the protective layer are damaged.

[0034] Description of reference numerals:

[0035] Figure 1-2 Middle: 1. Inner lining layer; 2. Metal bellows layer; 3. Outer protective layer; 4. Break;

[0036] Figure 3-6 Inner: 1. Inner lining layer; 2. Wrapped steel wire layer; 3. Metal bellows layer; 4. Heat shrink tubing layer; 5. Wear-resistant layer; 6. Sealing ring; 7. Pipe joint; 8. Ring-shaped sealing gasket; 9. Crimp section; 10. Rupture; 11. Barbed serrations. DETAILED DESCRIPTION

[0037] To address the issues raised in the prior art, the core inventive concept of this utility model is to install a sealing ring outside the trough of the metal bellows, squeezing it between the outer protective layer and the metal bellows, thereby sealing the metal bellows in sections. When the pressure-resistant hose is used at depth, if the outer protective layer breaks, only the small section of the metal bellows corresponding to the break is subjected to seawater pressure, preventing the entire metal bellows from collapsing. This allows the metal bellows to continue functioning for a longer period of time, preventing the pressure-resistant hose from failing quickly.

[0038] In the present invention, the specific depth of the deeper position is determined by the material, shape, and wall thickness of the metal bellows. The deeper the pressure-resistant metal bellows, the deeper the deeper position. In the present invention, there are no restrictions on the pressure-resistant capacity of the metal bellows or the specific depth of the deeper position; as long as the individual metal bellows is crushed at the deeper position, it is sufficient.

[0039] The present invention is further described in detail below with reference to the embodiments.

[0040] Specific embodiment 1 of the pressure-resistant hose assembly provided by the present utility model:

[0041] In this embodiment, the pressure-resistant hose serves as a hydraulic pipeline of a hydraulic system with a maximum working pressure of 20 MPa, and the pressure-resistant hose is used underwater at a depth of more than 300 m. The pressure-resistant hose needs to withstand the external pressure of seawater and the internal pressure of the liquid in the hydraulic pipeline, and the maximum internal pressure is greater than the external pressure of seawater.

[0042] like Figure 3-6As shown, the pressure-resistant hose assembly includes a pressure-resistant hose and a pipe joint 7 installed at the end of the pressure-resistant hose. The pressure-resistant hose includes a metal bellows layer 3 having a metal bellows and an outer protective layer located outside the metal bellows layer 3. Each wave crest of the metal bellows is in close contact with the inner wall of the outer protective layer. The metal bellows layer 3 also includes a sealing ring 6 that is sleeved on the outside of each wave trough of the metal bellows. The sealing ring 6 outside each wave trough is squeezed by the outer protective layer and the metal bellows, so that the sealing ring is in close contact with the inner wall of the metal bellows and the outer protective layer, ensuring the sealing between the metal bellows and the outer protective layer. A reinforcement layer for withstanding internal pressure is also provided between the inner lining layer 1 and the metal bellows layer 3 of the pressure-resistant hose. The reinforcement layer is a wound steel wire layer 2. The two ends of the wound steel wire layer 2 are fixed to the pipe joint 7 by bonding, clamping or welding, and the two ends of the metal bellows are fixed to the pipe joint 7 by bonding or welding. According to the size of the sealing ring 6 and the metal bellows, one, two or more sealing rings 6 may be arranged outside each trough.

[0043] By using the wrapped steel wire layer 2 to withstand internal pressure and the metal bellows to withstand external pressure, the pressure-resistant hose can be used as a hydraulic pipeline at depths exceeding 300 meters. Sealing rings 6 are installed on the outside of each trough of the metal bellows, and each sealing ring 6 is squeezed between the outer protective layer and the metal bellows, thereby sealing the bellows in sections. During use, if the outer protective layer is damaged, seawater enters the metal bellows layer 3 through the breach 10. The sealing rings 6 on both axial sides of the breach 10 prevent the seawater from spreading within the metal bellows layer 3, so that the seawater pressure acts only on the small section of the metal bellows corresponding to the damage, preventing the metal bellows from continuously accumulating deformation. At this time, only the corresponding small section of the metal bellows undergoes slight deformation, preventing the entire metal bellows from being crushed. This allows the metal bellows to continue to operate for a long time, preventing the pressure-resistant hose from failing in a short period of time. Before the pressure-resistant hose fails, personnel can take appropriate emergency measures.

[0044] At the same time, compared with the existing technology in which only a metal bellows is provided in the metal bellows layer 3, the sealing ring 6 can transmit the external pressure exerted on the outer protective layer to the trough through the sealing ring 6, thereby increasing the contact area between the outer protective layer and the metal bellows layer 3, reducing the pressure exerted on the crest of the metal bellows, avoiding the pressure concentration at the crest and causing the metal bellows to break at the trough, thereby improving the external pressure resistance of the metal bellows layer 3, and further improving the external pressure resistance of the pressure-resistant hose.

[0045] like Figure 3-6As shown, in order to further improve the external pressure resistance of the pressure-resistant hose, as a specific implementation method, the outer protective layer includes a heat shrinkable tube layer 4 and a corrosion-resistant wear-resistant layer 5 located on the outside of the heat shrinkable tube layer 4. The peaks of the metal bellows and the sealing rings 6 are in close contact with the heat shrinkable tube layer 4 to increase the contact area between the outer protective layer and the metal bellows layer 3, thereby further improving the external pressure resistance of the pressure-resistant hose.

[0046] Reference Figure 3-6 As shown, in other specific embodiments, the outer protective layer can also be entirely a corrosion-resistant wear-resistant layer. The wear-resistant layer and the wear-resistant layer 5 can be a wear-resistant, seawater corrosion-resistant outer protective layer commonly used in the prior art, such as a hydrogenated nitrile protective layer.

[0047] like Figure 3-6 As shown, in order to facilitate the installation of the sealing ring 6, the metal bellows includes an arc-shaped trough portion located at the trough position, an arc-shaped peak portion located at the peak position, and a connecting wall connected between the arc-shaped trough portion and the arc-shaped peak portion. The connecting wall is a plane wall perpendicular to the axis of the metal bellows. Each sealing ring 6 is squeezed between the connecting walls on both sides. The structure is simple and it is convenient to install the sealing ring 6.

[0048] However, in other specific embodiments, the connecting wall may also be an inclined side wall having a set angle with the axis of the metal bellows. In this case, it is necessary to squeeze the sealing ring 6 with a greater force so that the sealing ring 6 is in close contact with the metal bellows and the outer protective layer respectively, or to make the width of the outer side of the sealing ring 6 greater than the width of the inner side of the sealing ring 6 to adapt to the shape of the metal bellows.

[0049] like Figure 3-6 As shown, as a specific embodiment, the inner lining layer 1 is a polytetrafluoroethylene inner layer. Polytetrafluoroethylene has self-lubricating properties, which can reduce the friction between the inner lining layer 1 and the liquid in the inner lining layer 1, facilitate the transmission of hydraulic pressure, and the aging life of polytetrafluoroethylene is long.

[0050] In other embodiments, referring to Figure 3-6 As shown, the inner lining layer 1 can also be made of other commonly used thermoplastic materials, such as polyethylene, polypropylene, polybutene, polyolefin resin, polyvinyl chloride resin, polystyrene resin, polymethyl methacrylate, polyamide resin, polycarbonate resin, polyformaldehyde, polyphenylene ether, polyphenylene sulfide, polyetheretherketone or polyimide resin and other thermoplastic resins.

[0051] like Figure 3-6As shown, the pressure-resistant hose assembly also includes a crimping section 9. A portion of the pipe joint 7 is inserted into the inner lining layer 1 of the pressure-resistant hose. The axial ends of the crimping section 9 are respectively crimped on the pipe joint 7 and the outer protective layer, and one end of the crimping section 9 that is crimped on the pipe joint 7 is welded and sealed to the pipe joint 7 to prevent seawater from entering the metal bellows layer 3 from the connection between the crimping piece and the pipe joint 7. An annular sealing gasket 8 is provided between the other end and the outer protective layer and is squeezed between the crimping section 9 and the outer protective layer. Two or more annular sealing gaskets 8 are provided between the crimping section 9 and the outer protective layer to prevent seawater from entering the metal bellows layer 3 from the connection between the crimping piece and the outer protective layer, thereby achieving good sealing performance. The crimping section 9 can be an entire crimping tube or multiple crimping pieces that make up an entire crimping tube.

[0052] However, in other specific embodiments, reference Figure 3-6 As shown, the heat shrink tubing can be directly fixedly connected to the pipe joint 7 without the clamping piece. In the art, the heat shrink tubing includes an outer layer and an inner layer, the inner layer being a hot melt adhesive and the outer layer being made of a corrosion-resistant material. When the heat shrink tubing is fixedly connected to the pipe joint 7, it is necessary to heat the heat shrink tubing, which shrinks and becomes fixedly connected to the pipe joint 7.

[0053] In order to simplify the structure, as a specific implementation method, Figure 3-6 As shown, both ends of the heat shrinkable tube layer 4, the metal bellows layer 3 and the inner lining layer 1 are protruding from the wear-resistant layer 5, and the end of the buckling section 9 buckled on the outer protective layer is buckled on the heat shrinkable layer 4, that is, the part of the buckling section 9 buckled on the outer protective layer is buckled on the heat shrinkable tube layer 4, which has a simple structure. However, in other specific embodiments, refer to Figure 3-6 As shown, one end of the retaining section 9 can also be retained and pressed on the wear-resistant layer 5 .

[0054] As a specific implementation method, Figure 3-6 As shown, the end of the heat shrinkable tube layer 4 protrudes from the metal bellows layer 3 and the inner lining layer 1, and the pipe joint 7 includes a first shaft section for the metal bellows layer 3 and the inner lining layer 1 to be sleeved, and a second shaft section for the end of the heat shrinkable tube layer 4 to be sleeved. The end faces of the metal bellows layer 3 and the inner lining layer 1 abut against the step surface between the first shaft section and the second shaft section, and the structure is simple. At the same time, the heat shrinkable tube layer 4 and the second shaft section are sealed, the metal bellows layer 3 is welded and sealed to the step surface, and the inner lining layer 1 is sealed to the first shaft section, thereby improving the sealing performance of the connection between the pipe joint 7 and the pressure-resistant hose. However, in other specific embodiments, refer to Figure 3-6 As shown, the ends of the heat shrink tube layer 4, the metal bellows layer 3 and the inner lining layer 1 can also be made flush.

[0055] like Figure 3-6As shown, in order to simplify the structure, the pipe joint 7 is provided with barbed serrations 11, which are used to achieve a seal between the inner lining layer 1 and the pipe joint 7, resulting in a simple structure. However, in other specific embodiments, a sealing ring can also be provided between the pipe joint 7 and the inner lining layer 1 to achieve a seal between the pipe joint 7 and the inner lining layer 1.

[0056] Specific embodiment 2 of the pressure-resistant hose assembly provided by the present utility model:

[0057] The main difference between this embodiment and specific embodiment 1 is that: in specific embodiment 1, the pressure-resistant hose has to withstand a relatively large internal pressure, while in this embodiment, the pressure-resistant hose serves as a conveying pipe for transmitting normal pressure liquid between two containers. Since the internal pressure of the pressure-resistant hose is relatively small, the pressure-resistant hose does not include a reinforcement layer.

[0058] In other specific embodiments, the reinforcement layer may be a glass fiber layer or other structure for withstanding the internal pressure, depending on the magnitude of the internal pressure that the pressure-resistant hose is actually subjected to during operation.

[0059] Specific embodiments of the pressure-resistant hose provided by the utility model:

[0060] The specific structure of the pressure-resistant hose in this embodiment is the same as the specific structure of any one of the pressure-resistant hoses in the specific embodiments 1-2 of the pressure-resistant hose assembly of the present invention, and will not be repeated here.

[0061] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A pressure-resistant hose comprising a metal bellows layer and an outer protective layer located outside the metal bellows layer, wherein the metal bellows layer comprises a metal bellows, and each crest of the metal bellows is in close contact with the inner wall of the outer protective layer, characterized in that: The metal bellows layer further comprises a sealing ring sleeved on the outside of each trough of the metal bellows, and the sealing rings on the outside of each trough are squeezed and in close contact with the inner wall of the outer protective layer.

2. The pressure-resistant hose according to claim 1, wherein The metal bellows includes an arc-shaped trough portion located at the trough position, an arc-shaped peak portion located at the peak position, and a connecting wall connected between the arc-shaped trough portion and the arc-shaped peak portion. The connecting wall is a plane wall perpendicular to the axis of the metal bellows, and each sealing ring is squeezed between the connecting walls on both sides.

3. The pressure-resistant hose according to claim 1 or 2, characterized in that: A reinforcement layer for withstanding internal pressure is provided between the inner lining layer and the metal bellows layer of the pressure-resistant hose.

4. The pressure-resistant hose according to claim 3, wherein: The reinforcement layer is a wound steel wire layer.

5. The pressure-resistant hose according to claim 1 or 2, characterized in that: The inner lining of the pressure-resistant hose is a polytetrafluoroethylene inner layer.

6. The pressure-resistant hose according to claim 1 or 2, characterized in that: The outer protective layer includes a heat shrinkable tube layer and a corrosion-resistant wear-resistant layer located outside the heat shrinkable tube layer. Each wave crest and each sealing ring of the metal bellows are in close contact with the heat shrinkable tube layer.

7. A pressure-resistant hose assembly, comprising a pressure-resistant hose and a pipe joint installed at the end of the pressure-resistant hose, characterized in that: The pressure-resistant hose is the pressure-resistant hose according to any one of claims 1 to 5.

8. The pressure-resistant hose assembly according to claim 7, wherein: The pressure-resistant hose assembly also includes a crimping section, a part of the pipe joint is inserted into the inner lining layer of the pressure-resistant hose, the crimping section is crimped on the pipe joint and the outer protective layer at the same time, and one end of the crimping section is welded and sealed to the pipe joint, and more than two annular sealing gaskets are arranged between the crimping section and the outer protective layer.

9. The pressure-resistant hose assembly according to claim 8, wherein: The outer protective layer includes a heat shrinkable tube layer and a corrosion-resistant wear-resistant layer located on the outside of the heat shrinkable tube layer. The wave peaks and sealing rings of the metal bellows are in close contact with the heat shrinkable tube layer; the ends of the heat shrinkable tube layer, the metal bellows layer and the inner lining layer all protrude from the wear-resistant layer, and the part of the buckling section buckled on the outer protective layer is buckled on the heat shrinkable tube layer.

10. The pressure-resistant hose assembly according to claim 9, wherein: The end of the heat shrink tube layer protrudes from the metal bellows layer and the inner lining layer. The pipe joint includes a first shaft segment for the metal bellows layer and the inner lining layer to be sleeved and a second shaft segment for the end of the heat shrink tube layer to be sleeved. The end faces of the metal bellows layer and the inner lining layer abut against the step surface between the first shaft segment and the second shaft segment.

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