Acid and alkali resistant hose

Abstract

The utility model relates to the technical field of chemical engineering, in particular to an acid and alkali resistant hose which comprises a lining assembly, a reinforcing assembly is arranged on the outer wall of the lining assembly, and a fiber inhaul cable is arranged on one side of the reinforcing assembly. The first reinforcing lantern ring, the second reinforcing lantern ring, the fiber positioning ring, the rubber reinforcing ribs, the fiber inhaul cable and other components in the reinforcing assembly are arranged, the rubber reinforcing ribs in the first reinforcing lantern ring and the second reinforcing lantern ring are arranged in a staggered mode, and the fiber inhaul cable sequentially penetrates through supporting holes of the rubber reinforcing ribs; therefore, the fiber inhaul cable can form axial traction constraint on the rubber reinforcing rib through the supporting hole. And a guide groove of the lining assembly is matched to position the reinforcing lantern ring, so that the effects that the hose body can be subjected to compression resistance and tensile strength reinforcement through a multi-layer reinforcing structure, and the structural stability and durability of the hose in a complex acid-base environment are effectively improved are achieved.

Description

Technical Field

[0001] This application relates to the field of chemical technology, and in particular to an acid and alkali resistant hose. Background Technology

[0002] The transport of acidic and alkaline chemicals is extremely common in many scenarios of industrial production and daily life. From raw material transportation in the chemical industry to etching in electronic manufacturing, and chemical agent addition in sewage treatment, acid and alkali resistant hoses are indispensable.

[0003] Traditional acid and alkali resistant hoses are mostly made of a single material, such as simple rubber or plastic hoses. While rubber hoses have a certain degree of flexibility, their chemical stability is poor in strong acid and alkali environments, making them susceptible to corrosion. This leads to thinning of the hose wall, perforation, and ultimately leaks, resulting in material waste, potential serious safety hazards, and environmental pollution. Plastic hoses, although more corrosion-resistant than rubber hoses, have poor strength and bending resistance, making them prone to cracking or breaking under high pressure or frequent bending, affecting normal use.

[0004] A search revealed Chinese Patent Publication No. CN222513793U, which discloses an acid and alkali resistant flexible hose. This hose, from the inside out, comprises: an acid and alkali resistant inner layer, a first intermediate buffer layer, an elastic metal wire, a second intermediate buffer layer, and an outer protective layer. This invention features acid and alkali resistance, high cleanliness, low leaching, and lightweight properties; it also possesses good extensibility and can achieve a small bending radius, making the hose easy to bend.

[0005] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: the elastic metal wire of the aforementioned device, as the main reinforcing component, is prone to electrochemical corrosion when used for a long time in a strong acid or alkali environment, resulting in a decrease in structural strength; at the same time, the combination structure of the multi-layer buffer layer and the metal wire increases the weight and manufacturing complexity of the hose, and the rigidity of the metal wire may affect the fatigue resistance of the hose under high-frequency vibration or repeated bending conditions. Utility Model Content

[0006] In order to solve the problems mentioned in the background art, this application provides an acid and alkali resistant hose.

[0007] The present application provides an acid and alkali resistant hose, which adopts the following technical solution: an acid and alkali resistant hose includes an inner lining assembly, a reinforcing assembly is provided on the outer wall of the inner lining assembly, and a fiber cable is provided on one side of the reinforcing assembly;

[0008] The reinforcing component includes a first reinforcing collar and a second reinforcing collar. Both the first and second reinforcing collars include a fiber positioning ring made of woven fibers and a plurality of rubber reinforcing ribs fixedly sleeved on one side of the fiber positioning ring. The rubber reinforcing ribs inside the first and second reinforcing collars are arranged alternately.

[0009] The above solution uses a double-ring structure with staggered rubber reinforcing ribs to form a three-dimensional support network, which maintains the bending performance of the hose while significantly improving its axial compressive strength.

[0010] Optionally, the liner assembly includes an inner liner sleeve made of polytetrafluoroethylene and guide grooves equidistantly formed on the outer wall of the inner liner sleeve, the guide grooves being formed between a first reinforcing collar and a second reinforcing collar.

[0011] The above solution, using PTFE material in conjunction with the guide groove design, achieves excellent corrosion resistance, provides precise positioning for reinforced components, and effectively disperses mechanical stress.

[0012] Optionally, the first reinforcing collar and the second reinforcing collar may further include a support hole through one side of the rubber reinforcing rib and chamfers symmetrically opened on the left and right sides of the rubber reinforcing rib, wherein the angle of the chamfers is 45°.

[0013] The above solution combines the support holes and chamfers to reduce stress concentration, enhance the stability of the connection between components, and facilitate the assembly and adjustment of fiber cables.

[0014] Optionally, the fiber cable passes sequentially through the rubber reinforcing ribs inside the first reinforcing collar and the second reinforcing collar, and the fiber cable is movably sleeved inside the support hole.

[0015] Through the above scheme, the adjustable fiber cable threading structure forms a dynamic compensation mechanism, which automatically adjusts the tension distribution when the hose is bent to prevent excessive local deformation.

[0016] Optionally, the fiber cable is woven from polyester or aramid fibers and coated with an acid and alkali resistant coating.

[0017] Through the above scheme, the dual protection design enables the fiber cable to maintain high tensile strength while possessing excellent chemical corrosion resistance, thus extending its service life.

[0018] Optionally, the cross-section of the guide groove is polygonal or arc-shaped, and its depth is 1 / 3 to 1 / 2 of the thickness of the inner liner sleeve.

[0019] The above scheme optimizes the cross-sectional shape and depth parameters of the guide groove, achieving the best stress transmission effect while ensuring structural integrity.

[0020] Optionally, the rubber reinforcing ribs are evenly distributed along the circumference of the fiber positioning rings, and 4-12 rubber reinforcing ribs are fixedly sleeved on each fiber positioning ring.

[0021] The above scheme achieves a balance between material usage and mechanical properties by scientifically distributing the number and spacing of reinforcing ribs, thus unifying lightweight and high strength.

[0022] Optionally, the reinforcing assembly includes a plurality of first reinforcing collars and second reinforcing collars spaced apart along the axial direction of the inner liner assembly, with the spacing between adjacent reinforcing assemblies being 1-2 times the outer diameter of the hose.

[0023] The above solution ensures both the overall structural rigidity and the necessary flexibility of the hose, adapting to deformation requirements under complex working conditions.

[0024] Optionally, the fiber positioning ring is made of cross-woven carbon fiber or glass fiber, with a weaving density of 60%-80%.

[0025] By employing the above approach, the optimal fiber material combined with a specific weaving density achieves the best balance between circumferential strength and radial flexibility, thereby enhancing fatigue resistance.

[0026] In summary, this application includes the following beneficial technical effects:

[0027] 1. This utility model, through the inclusion of a first reinforcing collar and a second reinforcing collar in the reinforcing assembly, as well as components such as a fiber positioning ring, rubber reinforcing ribs, and fiber cables, achieves this by staggering the rubber reinforcing ribs inside the first and second reinforcing collars, with the fiber cables sequentially passing through the support holes of the rubber reinforcing ribs. This allows the fiber cables to exert axial tensile constraints on the rubber reinforcing ribs through the support holes. Combined with the guide groove of the inner liner assembly for positioning the reinforcing collars, this device achieves the effect of strengthening the hose body against compression and tension through a multi-layered reinforcing structure, effectively improving the structural stability and durability of the hose in complex acid and alkaline environments.

[0028] 2. This utility model incorporates components such as fiber positioning rings woven from carbon fiber or glass fiber, fiber cables coated with acid and alkali resistant coatings, and rubber reinforcing ribs with 45° chamfers. The high-strength braided structure of the fiber positioning rings, combined with the flexible support of the rubber reinforcing ribs, and the chamfering to reduce stress concentration, allows the fiber cables to isolate external corrosive media through the acid and alkali resistant coating. Simultaneously, the circumferentially distributed rubber reinforcing ribs form a ring-like support for the outer wall of the hose. Combined with a rationally designed spacing between adjacent reinforcing components, this device achieves the dual optimization of materials and structure, providing corrosion protection and enhancing the mechanical properties of the hose during acid and alkali media transportation, thus extending the hose's service life. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0030] Figure 2 This is a partial structural diagram of an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of a partial structure of the reinforcing component in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the installation of a partial structure of the reinforcing component in an embodiment of this application.

[0033] Reference numerals: 1. Lining assembly; 101. Lining sleeve; 102. Guide groove; 2. Reinforcing assembly; 21. First reinforcing collar; 22. Second reinforcing collar; 201. Fiber positioning ring; 202. Rubber reinforcing rib; 203. Support hole; 204. Chamfer; 3. Fiber cable. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0035] This application discloses an acid and alkali resistant hose.

[0036] Please see Figure 1 An acid and alkali resistant hose includes an inner liner assembly 1, a reinforcing assembly 2 is provided on the outer wall of the inner liner assembly 1, and a fiber cable 3 is provided on one side of the reinforcing assembly 2.

[0037] The fiber cable 3 is woven from polyester or aramid fibers and coated with an acid and alkali resistant coating.

[0038] Please see Figures 2 to 4 The reinforcing component 2 includes a first reinforcing collar 21 and a second reinforcing collar 22. Both the first reinforcing collar 21 and the second reinforcing collar 22 include a fiber positioning ring 201 made of fiber braid and a plurality of rubber reinforcing ribs 202 fixedly sleeved on one side of the fiber positioning ring 201. The rubber reinforcing ribs 202 inside the first reinforcing collar 21 and the second reinforcing collar 22 are arranged alternately.

[0039] The first reinforcing collar 21 and the second reinforcing collar 22 also include a support hole 203 through one side of the rubber reinforcing rib 202 and chamfers 204 symmetrically opened on the left and right sides of the rubber reinforcing rib 202, the chamfers 204 having an angle of 45°.

[0040] The rubber reinforcing ribs 202 are evenly distributed along the circumference of the fiber positioning rings 201, and 4-12 rubber reinforcing ribs 202 are fixedly sleeved on each fiber positioning ring 201.

[0041] The reinforcing component 2 includes a plurality of first reinforcing collars 21 and second reinforcing collars 22 spaced apart along the axial direction of the inner liner component 1, and the spacing between adjacent reinforcing components 2 is 1-2 times the outer diameter of the hose.

[0042] The fiber cable 3 passes through the rubber reinforcing ribs 202 inside the first reinforcing collar 21 and the second reinforcing collar 22 in sequence, and the fiber cable 3 is movably sleeved inside the support hole 203.

[0043] The fiber positioning ring 201 is made of cross-woven carbon fiber or glass fiber with a weaving density of 60%-80%.

[0044] The inner liner assembly 1 includes an inner liner sleeve 101 made of polytetrafluoroethylene and guide grooves 102 equidistantly opened on the outer wall of the inner liner sleeve 101, the guide grooves 102 being opened between the first reinforcing collar 21 and the second reinforcing collar 22.

[0045] The cross-section of the guide groove 102 is polygonal or arc-shaped, and its depth is 1 / 3 to 1 / 2 of the thickness of the inner liner sleeve 101.

[0046] Further explanation is needed: Reinforcing component 2 is the core reinforcing structure of the acid and alkali resistant hose, mainly composed of alternating first reinforcing collars 21 and second reinforcing collars 22. Each collar includes a fiber positioning ring 201 and a rubber reinforcing rib 202. Its core function is to improve the mechanical properties and environmental adaptability of the hose through a multi-layered composite structure: the fiber positioning ring 201 is made of cross-woven carbon fiber or glass fiber, providing a basic support frame for the hose with its high-strength braided structure, effectively resisting external pressure and deformation; the rubber reinforcing rib 202 is evenly distributed circumferentially and fixedly connected to the fiber positioning ring 201, its flexible material can buffer dynamic pressure, combined with a 45° chamfer 2... 04. The design reduces stress concentration and avoids localized cracking. The rubber reinforcing ribs 202 of the first reinforcing collar 21 and the second reinforcing collar 22 are arranged in an alternating pattern to form a three-dimensional mesh support system, enhancing the radial compressive strength and torsional stiffness of the hose. The fiber cable 3 passes through the support hole 203 of the rubber reinforcing rib 202 and extends axially. Through the high strength characteristics of polyester fiber or aramid fiber and the acid and alkali resistant coating on the surface, it achieves axial tensile constraint on the reinforcing component 2, suppressing the longitudinal tensile or contractile deformation of the hose when conveying the medium. Combined with the positioning function of the guide groove 102 of the inner liner component 1 for the reinforcing collar, it ensures that the reinforcing component 2 is evenly distributed along the hose axis, forming a continuous and balanced reinforced protection.

[0047] The implementation principle of the acid and alkali resistant hose in this application embodiment is as follows:

[0048] First, the inner lining component 1 constructs a corrosion-resistant core channel: the inner lining sleeve 101, made of polytetrafluoroethylene, has excellent chemical stability, directly contacts acid and alkali media and forms an isolation layer to prevent the hose body from being corroded. The guide groove 102 on the outer wall reinforces the component 2 to provide an axial positioning reference, ensuring that the first reinforcing collar 21 and the second reinforcing collar 22 are evenly distributed in the predetermined position to avoid circumferential sliding.

[0049] Secondly, the strengthening component 2 achieves radial strength enhancement: the fiber positioning rings 201 of the first strengthening collar 21 and the second strengthening collar 22 rely on the high-strength mesh structure to form a rigid support skeleton for the inner liner sleeve 101, resisting external radial pressure; the circumferentially evenly distributed rubber reinforcing ribs 2024-12 per ring absorb dynamic impact through flexible elastic deformation, and their 45° chamfer 204 reduces stress concentration points. With the staggered arrangement design, when the hose is twisted or locally squeezed, the load is dispersed through three-dimensional cross support to prevent local collapse or cracking.

[0050] Next, the fiber cable 3 constructs an axial constraint system: the surface of the fiber cable 3, woven from polyester / aramid fibers, is coated with an acid and alkali resistant coating, penetrates the support hole 203 of the rubber reinforcing rib 202 and extends along the hose axis, forming a longitudinal tensile force transmission path. When the hose is axially stretched or contracted due to the medium pressure, the fiber cable 3 applies a reverse tensile force to the rubber reinforcing rib 202 through the support hole 203, suppressing the longitudinal deformation of the inner liner sleeve 101. At the same time, the coating isolates the corrosive medium, preventing the fiber cable 3 itself from being corroded and failing.

[0051] Next, the spacing design ensures balanced stress distribution: the reinforcing components 2 are arranged at intervals along the axial direction of the inner liner components 1, with adjacent spacing being 1-2 times the outer diameter of the hose. This ensures that the reinforcing structure is neither too dense, leading to a decrease in flexibility, nor too sparse, creating stress blind spots. This spacing allows the axial constraint force of the fiber cable 3 to be uniformly coupled with the radial support force of the reinforcing collar. Under complex working conditions such as bending and vibration, each component is positioned and deformed in coordination through the guide groove 102, avoiding stress concentration in local areas.

[0052] Finally, multi-dimensional protection ensures long-term stable delivery: the PTFE inner liner 101 isolates chemical corrosion, the rigid-flexible combination of the fiber positioning ring 201 and the rubber reinforcing rib 202 resists mechanical stress, and the fiber cable 3 constrains axial deformation. The three components are positioned by the guide groove 102, connected by the support hole 203, and arranged in an alternating manner to form a composite protection system of "corrosion resistance, pressure resistance, tensile strength, and torsion resistance". When transporting strong acid and alkali media, the hose as a whole continuously withstands the medium pressure, external loads, and environmental erosion through the synergistic effect of the material's chemical stability and structural mechanical properties, ensuring a safe and reliable delivery process.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. Acid and alkali resistant hose comprising an inner liner assembly (1), characterized in that: The outer wall of the inner liner assembly (1) is provided with a reinforcing assembly (2), one side of the reinforcing assembly (2) is provided with a fiber cable (3); The reinforcing assembly (2) comprises a first reinforcing collar (21) and a second reinforcing collar (22), the first reinforcing collar (21) and the second reinforcing collar (22) each comprise a fiber positioning ring (201) composed of fiber weaving and a plurality of rubber reinforcing ribs (202) fixedly sleeved on one side of the fiber positioning ring (201), the rubber reinforcing ribs (202) inside the first reinforcing collar (21) and the second reinforcing collar (22) are staggered.

2. The acid and alkali resistant hose according to claim 1, characterized in that: The inner liner assembly (1) comprises an inner liner sleeve (101) composed of polytetrafluoroethylene and guide grooves (102) equidistantly opened on the outer wall of the inner liner sleeve (101), the guide grooves (102) are opened between the first reinforcing collar (21) and the second reinforcing collar (22).

3. The acid and alkali resistant hose according to claim 1, wherein: The first reinforcing collar (21) and the second reinforcing collar (22) further comprise support holes (203) opened through one side of the rubber reinforcing ribs (202) and chamfers (204) symmetrically opened on the left and right sides of the rubber reinforcing ribs (202), the angle of the chamfer (204) is 45°.

4. The acid and alkali resistant hose according to claim 2, wherein: The fiber cable (3) sequentially passes through the rubber reinforcing ribs (202) inside the first reinforcing collar (21) and the second reinforcing collar (22), and is movably sleeved in the support hole (203).

5. The acid and alkali resistant hose according to claim 1, wherein: The fiber cable (3) is woven from polyester fiber or aramid fiber and coated with an acid and alkali resistant coating on the surface.

6. The acid and alkali resistant hose according to claim 2, wherein: The cross section of the guide groove (102) is polygonal or arc-shaped, and the depth is 1 / 3 to 1 / 2 of the thickness of the inner liner sleeve (101).

7. The acid and alkali resistant hose according to claim 1, wherein: The rubber reinforcing ribs (202) are uniformly distributed along the circumference of the fiber positioning ring (201), and 4-12 rubber reinforcing ribs (202) are fixedly sleeved on each fiber positioning ring (201).

8. The acid and alkali resistant hose according to claim 1, wherein: The reinforcing assembly (2) comprises a plurality of first reinforcing collars (21) and second reinforcing collars (22) arranged axially at intervals along the inner liner assembly (1), and the distance between adjacent reinforcing assemblies (2) is 1-2 times the outer diameter of the hose.

9. The acid and alkali resistant hose according to claim 1, wherein: The fiber positioning ring (201) is cross-woven from carbon fiber or glass fiber, and the weaving density is 60%-80%.

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