A wall-piercing sleeve with shock-absorbing function for power cable layout

Abstract

The present invention relates to a wall-piercing sleeve with a shock-absorbing function for the layout of power cables, which is used to fix cables in through-holes of a wall, and includes a mounting pipe sleeved on the outer surface of the cable and provided with threads at both ends, a shock-absorbing pipe sleeved on the outside of the mounting pipe and located inside the through-hole, and two fixing nuts respectively screwed on both ends of the mounting pipe. The length of the mounting pipe is greater than the thickness of the wall, the length of the shock-absorbing pipe is less than the thickness of the wall, the fixing nuts are respectively in contact with the wall, the mounting pipe can be installed on the wall through the fixing nuts, the cable can pass through the wall through the mounting pipe, and the shock-absorbing pipe can play a shock-absorbing function.

Description

Technical Field

[0001] The present invention relates to a wall-piercing sleeve with a shock-absorbing function for power cable layout. Background Art

[0002] The wall-piercing sleeve is also called a wall-piercing pipe, a waterproof sleeve, a wall embedded pipe. The waterproof sleeve is divided into a rigid waterproof sleeve and a flexible waterproof sleeve. The main difference between the two is the places where they are used. The flexible waterproof sleeve is mainly used in places with high requirements such as air defense walls and water tanks. The rigid waterproof sleeve is generally used in positions such as basements where pipes need to pass through pipes. The wall-piercing sleeve is also a device used in the process of power installation. Its main function is to isolate the power cable from the wall to avoid mutual friction between the wall and the cable, resulting in cable wear and leakage. Currently, most of the used wall-piercing sleeves are straight pipes preset in the wall. There is friction between the straight pipe and the cable. The material of the straight pipe is relatively hard, which affects the service life of the cable. The shock-absorbing function of the straight pipe is poor, and the straight pipe is easy to fall off when the external vibration is large. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a wall-piercing sleeve with a shock-absorbing function for power cable layout that can solve the above problems.

[0004] The present invention adopts the following technical solutions:

[0005] The present invention is used to fix the cable in the through-hole of the wall, and includes an installation pipe sleeved on the outer surface of the cable and provided with threads at both ends, a shock-absorbing pipe sleeved on the outside of the installation pipe and located inside the through-hole, and two fixing nuts respectively screwed on both ends of the installation pipe. The length of the installation pipe is greater than the thickness of the wall, the length of the shock-absorbing pipe is less than the thickness of the wall, and the two fixing nuts are respectively located on both sides of the wall.

[0006] In the present invention, gaskets are respectively arranged between the two fixing nuts and the wall.

[0007] In the present invention, the cross-section of the inner surface of a section of the installation pipe located inside the through-hole is circular, and the cross-section of the outer surface is oval A.

[0008] In the present invention, the inner surface of the shock-absorbing pipe is oval B with a size and shape different from that of the outer surface oval A of the installation pipe.

[0009] In the present invention, shock-absorbing glue is poured between the cable and the installation pipe.

[0010] In the present invention, shock-absorbing glue is poured between the installation pipe and the shock-absorbing pipe.

[0011] In the present invention, shock-absorbing glue is poured between the shock-absorbing pipe and the inner side of the through-hole.

[0012] In the present invention, the material of the installation pipe is a metal material.

[0013] The material of the shock-absorbing pipe described in the present invention is rubber material.

[0014] The material of the gasket described in the present invention is metal material.

[0015] The positive effects of the present invention are as follows:

[0016] 1. The installation pipe of the present invention can be installed on the wall through the fixing nut, the cable can pass through the wall through the installation pipe, and the shock-absorbing pipe can play a shock-absorbing function.

[0017] 2. The gasket of the present invention can reduce the wear between the fixing nut and the wall.

[0018] 3. The oval A of the present invention can cooperate with the shock-absorbing pipe to fixedly connect the installation pipe and the shock-absorbing pipe together.

[0019] 4. The present invention makes the installation pipe and the shock-absorbing pipe rotate relative to each other, and the oval A and the oval B are clamped together, thereby fixedly connecting the installation pipe and the shock-absorbing pipe together.

[0020] 5. The shock-absorbing glue is poured between the cable and the installation pipe of the present invention, which can fixedly connect the cable and the installation pipe together and play a shock-absorbing role.

[0021] 6. The shock-absorbing glue is poured between the installation pipe and the shock-absorbing pipe of the present invention, which can fixedly connect the installation pipe and the shock-absorbing pipe together and play a shock-absorbing role.

[0022] 7. The shock-absorbing glue is poured between the shock-absorbing pipe and the inner side of the through hole of the present invention, which can fixedly connect the shock-absorbing pipe and the through hole together and play a shock-absorbing role.

[0023] 8. The material of the installation pipe of the present invention is metal material, which can increase the installation strength between the installation pipe and the wall.

[0024] 9. The material of the shock-absorbing pipe of the present invention is rubber material, which can achieve a good shock-absorbing effect.

[0025] 10. The material of the gasket of the present invention is metal material, which can well reduce the wear between the fixing nut and the wall. Brief Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the oval A of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the oval B of the present invention;

[0029] Figure 4This is a schematic diagram of the cooperation between the installation pipe and the shock-absorbing pipe of the present invention.

[0030] In the attached drawings: 1. Wall; 2. Through hole; 3. Cable; 4. Installation pipe; 5. Shock-absorbing pipe; 6. Fixed nut; 7. Gasket; 8. Oval A; 9. Oval B. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation to the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0032] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary embodiments of the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the attached drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters indicate similar items in the following attached drawings. Therefore, once an item is defined in one attached drawing, it does not need to be further discussed in subsequent attached drawings.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, top, bottom, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation words do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0035] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0036] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above words have no special meanings. Therefore, it should not be construed as a limitation on the protection scope of the present application.

[0037] As shown in Figure 1 —4, the present invention includes a wall body 1, a through hole 2 provided on the wall body 1, a cable 3 provided inside the through hole 2, an installation pipe 4 sleeved on the outer surface of the cable 3 and having threads at both ends, a shock-absorbing pipe 5 sleeved on the outer side of the installation pipe 4 and located inside the through hole 2, and two fixing nuts 6 respectively screwed on both ends of the installation pipe 4. The length of the installation pipe 4 is greater than the thickness of the wall body 1, the length of the shock-absorbing pipe 5 is less than the thickness of the wall body 1, and the two fixing nuts 6 are respectively located on both sides of the wall body 1. The installation pipe 4 can be installed on the wall body 1 through the fixing nuts 6, the cable 3 can pass through the wall body 1 through the installation pipe 4, and the shock-absorbing pipe 5 can play a shock-absorbing function.

[0038] Gaskets 7 are respectively provided between the two fixing nuts 6 of the present invention and the wall body 1. The gaskets 7 can reduce the wear between the fixing nuts 6 and the wall body 1.

[0039] The cross-section of the inner surface of a section of the installation pipe 4 located inside the through-hole 2 in the present invention is circular, and the cross-section of the outer surface is an ellipse A8. The installation pipe 4 and the shock-absorbing pipe 5 are fixedly connected together.

[0040] The inner surface of the shock-absorbing pipe 5 in the present invention is an ellipse B9 that is different in size and shape from the outer-surface ellipse A8 of the installation pipe 4. By relatively rotating the installation pipe 4 and the shock-absorbing pipe 5, the ellipse A8 and the ellipse B9 are closely attached together, thereby fixedly connecting the installation pipe 4 and the shock-absorbing pipe 5 together.

[0041] A shock-absorbing adhesive is poured between the cable 3 and the installation pipe 4 in the present invention. This can fixedly connect the cable 3 and the installation pipe 4 together and play a shock-absorbing role.

[0042] A shock-absorbing adhesive is poured between the installation pipe 4 and the shock-absorbing pipe 5 in the present invention. This can fixedly connect the installation pipe 4 and the shock-absorbing pipe 5 together and play a shock-absorbing role.

[0043] A shock-absorbing adhesive is poured between the shock-absorbing pipe 5 and the inner side of the through-hole 2 in the present invention. This can fixedly connect the shock-absorbing pipe 5 and the through-hole 2 together and play a shock-absorbing role.

[0044] The material of the installation pipe 4 in the present invention is a metal material. This can increase the installation strength between the installation pipe 4 and the wall 1.

[0045] The material of the shock-absorbing pipe 5 in the present invention is a rubber material, which can achieve a good shock-absorbing effect.

[0046] The material of the gasket 7 in the present invention is a metal material. This can well reduce the wear between the fixing nut 6 and the wall 1.

[0047] The installation pipe 4 and the gasket 7 are specifically made of three materials, namely, imported stainless steel, high-carbon steel, and brass, through heat treatment and precision grinding. Ordinary brass is a binary alloy of copper and zinc, and its zinc content varies within a relatively large range. Therefore, its room-temperature structure is also quite different. According to the Cu-Zn binary phase diagram, there are three types of brass at room temperature: brass with a zinc content below 35% has a microstructure composed of a single-phase α solid solution at room temperature and is called α brass; brass with a zinc content in the range of 36% - 46% has a microstructure composed of (α + β) two phases at room temperature and is called (α + β) brass (two-phase brass); brass with a zinc content exceeding 46% - 50% has a microstructure composed only of the β phase at room temperature and is called β brass. Single-phase α brass (from H96 to H65) has good plasticity and can withstand hot and cold processing. However, single-phase α brass is prone to medium-temperature brittleness during hot processing such as forging, and its specific temperature range varies with the Zn content, generally between 200 and 700 °C. Therefore, the temperature during hot processing should be higher than 700 °C. The main reasons for the generation of medium-temperature brittleness in single-phase α brass are that there are two ordered compounds, Cu3Zn and Cu9Zn, in the α phase region of the Cu-Zn alloy system, and an ordered transformation occurs during medium- and low-temperature heating, making the alloy brittle. In addition, trace amounts of harmful impurities such as lead and bismuth in the alloy form low-melting eutectic films distributed at the grain boundaries, resulting in intergranular fracture during hot processing. Practice has shown that adding a trace amount of cerium can effectively eliminate medium-temperature brittleness. Two-phase brass (from H63 to H59) has, in addition to the α phase with good plasticity in its alloy structure, a β solid solution based on the electron compound CuZn. The β phase has high plasticity at high temperatures, while the β′ phase (ordered solid solution) at low temperatures is hard and brittle. Therefore, (α + β) brass should be forged in the hot state. β brass with a zinc content greater than 46% - 50% is too hard and brittle in performance to be pressure-processed. Due to different zinc contents in brass, its mechanical properties are also different, and the mechanical properties of brass vary with the zinc content. For α brass, as the zinc content increases, both σb and δ continuously increase. For (α + β) brass, when the zinc content increases to about 45% before, the room-temperature strength continuously increases. If the zinc content is further increased, since a more brittle r phase (a solid solution based on the Cu5Zn8 compound) appears in the alloy structure, the strength drops sharply. The room-temperature plasticity of (α + β) brass always decreases as the zinc content increases. Therefore, copper-zinc alloys with a zinc content exceeding 45% have no practical value. Ordinary brass has a very wide range of uses, such as water tank bands, supply and drainage pipes, medals, bellows, serpentine pipes, condenser pipes, cartridge cases, and various complex-shaped stamped products, small hardware parts, etc. As the zinc content increases from H63 to H59, they can all withstand hot processing well and are mostly used in various parts of machinery and electrical appliances, stamped parts, musical instruments, etc.To improve the corrosion resistance, strength, hardness, and machinability of brass, a small amount (generally 1% - 2%, a few up to 3% - 4%, and extremely rarely up to 5% - 6%) of elements such as tin, aluminum, manganese, iron, silicon, nickel, and lead is added to the copper-zinc alloy to form ternary, quaternary, or even quinary alloys, which are complex brasses, also known as special brasses. Advantages of high-carbon steel: 1. High hardness (HRC60 - 65) and good wear resistance can be obtained after heat treatment. 2. It has moderate hardness in the annealed state and good machinability. 3. The raw materials are easily available and the production cost is low. Its disadvantages are: 1. Poor hot hardness. When the cutting tool working temperature is greater than 200°C, its hardness and wear resistance drop sharply. 2. Low hardenability. When water quenched, the completely hardened diameter is generally only 15 - 18 mm; when oil quenched, the maximum diameter or thickness of the completely hardened part is only about 6 mm, and it is prone to deformation and cracking. The hardness and strength of high-carbon steel mainly depend on the amount of carbon dissolved in the steel and increase with the increase of the dissolved carbon amount. When the dissolved carbon amount exceeds 0.6%, the hardness no longer increases after quenching, only the amount of excess carbide increases, the wear resistance of the steel increases slightly, while the plasticity, toughness, and elasticity decrease. Therefore, different steel grades are often selected according to the use conditions and the strength and toughness matching of the steel. For example, for manufacturing springs or spring-like parts with low stress, 65 steel with a lower carbon content can be selected. Generally, high-carbon steel can be produced by electric furnaces, open-hearth furnaces, and oxygen converters. When higher quality or special quality is required, electric furnace smelting plus vacuum consumable or electroslag remelting can be used. During smelting, the chemical composition is strictly controlled, especially the content of sulfur and phosphorus. To reduce segregation and improve isotropy, the steel ingot can be subjected to high-temperature diffusion annealing (especially important for tool steel). During hot working, the forging (rolling) stop temperature of hypereutectoid steel is required to be low (about 800°C). After forging and rolling into finished products, the precipitation of coarse network carbide should be avoided, and slow cooling should be noted below 700°C to prevent cracks caused by thermal stress. During heat treatment or hot working, surface decarburization should be prevented (especially important for spring steel). During hot working, there should be enough reduction ratio to ensure the quality and service performance of the steel.

[0048] The requirements for welding performance vary depending on the uses of stainless steel products. For tableware of the first type, generally no requirements are imposed on welding performance, and this even includes some pot manufacturers. However, for the vast majority of products, good welding performance of the raw materials is needed, such as tableware of the second type, vacuum flasks, steel pipes, water heaters, water dispensers, etc. The vast majority of stainless steel products require good corrosion resistance, such as tableware of the first and second types, kitchen utensils, water heaters, water dispensers, etc. Some foreign merchants also conduct corrosion resistance tests on products: heat the NACL aqueous solution to boiling, pour out the solution after a period of time, wash and dry it, weigh the weight loss to determine the degree of corrosion (note: when polishing the product, because the emery cloth or sandpaper contains Fe components, rust spots will appear on the surface during testing). Heat resistance refers to the ability of stainless steel to maintain its excellent physical and mechanical properties at high temperatures. Carbon is an element that strongly forms and stabilizes austenite and expands the austenite region in austenitic stainless steel. The ability of carbon to form austenite is about 30 times that of nickel. Carbon is an interstitial element, and the strength of austenitic stainless steel can be significantly improved through solution strengthening. Carbon can also improve the stress corrosion resistance of austenitic stainless steel in highly concentrated chlorides (such as 42% MgCl2 boiling solution). However, in austenitic stainless steel, carbon is often regarded as a harmful element, mainly because under some conditions in the corrosion-resistant applications of stainless steel (such as welding or heating at 450 - 850 °C), carbon can form high-chromium Cr23C6-type carbides with chromium in the steel, resulting in local chromium depletion and a decrease in the corrosion resistance of the steel, especially the intergranular corrosion resistance. Therefore, since the 1960s, the newly developed chromium-nickel austenitic stainless steels mostly have a carbon content less than 0.03% or 0.02% ultra-low carbon type. It can be known that as the carbon content decreases, the intergranular corrosion sensitivity of the steel decreases, and the most obvious effect is achieved when the carbon content is less than 0.02%. Some experiments also indicate that carbon will also increase the pitting corrosion tendency of chromium austenitic stainless steel. Due to the harmful effects of carbon, not only should the carbon content be controlled as low as required during the smelting process of austenitic stainless steel, but also during subsequent hot and cold processing and heat treatment processes, the surface of the stainless steel should be prevented from carbon enrichment to avoid the precipitation of chromium carbides.

[0049] During use, first, a fixing nut 6 and a gasket 7 are sleeved on the cable 3. An installation pipe 4 is sleeved on the outer surface of the cable 3. A shock-absorbing pipe 5 is sleeved on the outer surface of the installation pipe 4. The installation pipe 4 and the shock-absorbing pipe 5 are rotated relative to each other so that the ellipse A8 and the ellipse B9 are closely attached together, thereby fixedly connecting the installation pipe 4 and the shock-absorbing pipe 5 together. Shock-absorbing glue is poured between the cable 3 and the installation pipe 4, shock-absorbing glue is poured between the installation pipe 4 and the shock-absorbing pipe 5, and it is placed into the through-hole. Shock-absorbing glue is poured between the shock-absorbing pipe 5 and the inner side of the through-hole 2. A fixing nut 6 and a gasket 7 are sleeved on the other end of the cable 3, and the two fixing nuts 6 are tightened, thereby fixing the installation pipe 4 and the cable 3 on the wall 1.

[0050] 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wall-piercing sleeve with shock-absorbing function for power cable layout, used to fix a cable (3) in a through-hole (2) of a wall (1). It is characterized in that: It includes a mounting pipe (4) sleeved on the outer surface of the cable (3) and provided with threads at both ends, a shock-absorbing pipe (5) sleeved on the outside of the mounting pipe (4) and located inside the through-hole (2), and two fixing nuts (6) screwed on both ends of the mounting pipe (4) respectively. The length of the mounting pipe (4) is greater than the thickness of the wall (1), the length of the shock-absorbing pipe (5) is less than the thickness of the wall (1), and the two fixing nuts (6) are respectively located on both sides of the wall (1). The cross-section of the inner surface of a section of the mounting pipe (4) located inside the through-hole (2) is circular, and the cross-section of the outer surface is an ellipse A (8). The inner surface of the shock-absorbing pipe (5) is an ellipse B (9) with a size and shape different from that of the outer surface ellipse A (8) of the mounting pipe (4). The mounting pipe (4) and the shock-absorbing pipe (5) rotate relative to each other, and the ellipse A (8) and the ellipse B (9) are clamped together, so that the mounting pipe (4) and the shock-absorbing pipe (5) are fixedly connected together.

2. A wall-piercing sleeve with shock-absorbing function for power cable layout according to claim 1, It is characterized in that: Gaskets (7) are respectively arranged between the two fixing nuts (6) and the wall (1).

3. A wall-piercing sleeve with shock-absorbing function for power cable layout according to claim 1, It is characterized in that: Shock-absorbing glue is poured between the cable (3) and the mounting pipe (4).

4. A wall-piercing sleeve with shock-absorbing function for power cable layout according to claim 3, It is characterized in that: Shock-absorbing glue is poured between the mounting pipe (4) and the shock-absorbing pipe (5).

5. A wall-piercing sleeve with shock-absorbing function for power cable layout according to claim 4, It is characterized in that: Shock-absorbing glue is poured between the shock-absorbing pipe (5) and the inner side of the through-hole (2).

6. A wall-piercing sleeve with shock-absorbing function for power cable layout according to claim 5, It is characterized in that: The material of the mounting pipe (4) is a metal material.

7. A wall-piercing sleeve with shock-absorbing function for power cable layout according to claim 5, It is characterized in that: The material of the shock-absorbing pipe (5) is a rubber material.

8. A wall-piercing sleeve with shock-absorbing function for power cable layout according to claim 2, It is characterized in that: The material of the gasket (7) is a metal material.

Images