Leak-proof differential pressure tube
By integrating the stainless steel tube with the double-protruding head into a reduced-diameter bulge structure and using an elastic clamp design, the problem of reduced sealing performance caused by welding of traditional differential pressure tubes is solved, achieving higher sealing performance and strength, and ensuring the accuracy of pressure detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINHAI AOFA PIPES CO LTD
- Filing Date
- 2025-08-25
- Publication Date
- 2026-06-09
Smart Images
Figure CN224339706U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of differential pressure pipe assembly technology, and more specifically, to a leak-proof differential pressure pipe. Background Technology
[0002] Leak-proof aftertreatment differential pressure pipe assemblies are devices used to monitor and control pressure differentials in aftertreatment systems and prevent fluid leakage. They are widely used in automotive aftertreatment systems, hydraulic systems, etc., demonstrating strong applicability and market demand, and possessing broad market prospects. Given the risks posed by welding defects, there is an urgent market demand for pipe products that can effectively prevent gas leakage. Existing technologies have the following shortcomings in their application:
[0003] Traditional differential pressure pipes use a welding process at the head, which can easily lead to a decrease in sealing performance during use, resulting in gas leakage, inaccurate pressure detection, and unsatisfactory sealing effect after long-term use.
[0004] Therefore, there is an urgent need for a leak-proof differential pressure pipe to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to address the problem that the welding process used at the head of the existing traditional differential pressure pipe can easily lead to a decrease in sealing performance, gas leakage, inaccurate pressure detection, and unsatisfactory sealing effect after long-term use.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A leak-proof differential pressure pipe is proposed to improve the above-mentioned problems.
[0008] The application is as follows:
[0009] A leak-proof differential pressure pipe includes a differential pressure pipe assembly, the differential pressure pipe assembly including a stainless steel pipe, a flexible hose, and an elastic clamp fastened to the flexible hose;
[0010] The stainless steel pipe consists of a steel pipe body and a double-protruding head located at one end of the steel pipe body, and the flexible hose is sleeved and installed on the double-protruding head.
[0011] The double-protruding head includes a connecting pipe, a front bulge, and a rear bulge. The end face of the rear bulge away from the connecting pipe is fixedly connected to the steel pipe body.
[0012] As a preferred technical solution of this application, one end face of the hose is in contact with the outer surface of the end bulge, and the diameter of the end bulge is larger than the outer diameter of the hose.
[0013] As a preferred technical solution of this application, the inner surface of the hose is in contact with the connecting pipe and the outer surface of the bulge at the head end.
[0014] As a preferred technical solution of this application, the elastic clamp is located between the first bulge and the last bulge.
[0015] As a preferred technical solution of this application, the interior of the double protrusion head is hollow, and the interior of the double protrusion head is connected to the interior of the steel pipe body.
[0016] As a preferred technical solution of this application, the diameter of the end bulge is 10.5 mm, the diameter of the beginning bulge is 7.2 mm, and the diameter of the beginning bulge is larger than the inner diameter of the hose.
[0017] As a preferred technical solution of this application, the stainless steel pipe is integrally formed.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] 1. The double boss head is manufactured using a one-piece molding process with a reduced diameter bulge, eliminating the traditional welding process. This improves the strength and sealing performance of the double boss head, further increases processing speed, reduces manufacturing costs, and facilitates practical use.
[0020] 2. The elastic clamp, in conjunction with the double-protruding head, provides a good locking effect on the hose, effectively preventing the hose from detaching from the stainless steel pipe and greatly improving the product's sealing performance. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of a leak-proof differential pressure pipe provided in this application.
[0022] Figure 2 This is a schematic diagram of the exploded structure of a leak-proof differential pressure pipe provided in this application.
[0023] Figure 3 This application provides a schematic diagram of the structure of a double-protrusion head in a leak-proof differential pressure pipe.
[0024] Figure 4 This application provides a schematic diagram of the structure of the steel pipe body in a leak-proof differential pressure pipe.
[0025] The image shows:
[0026] 1. Differential pressure pipe assembly; 2. Stainless steel pipe; 3. Flexible hose; 4. Elastic clamp; 21. Steel pipe body; 22. Double-protruding head; 11. Connecting pipe; 12. Head bulge; 13. End bulge. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.
[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0029] Example:
[0030] like Figure 1-4 As shown, the present embodiment proposes a leak-proof differential pressure pipe, which includes a differential pressure pipe assembly 1, the differential pressure pipe assembly 1 including a stainless steel pipe 2, a flexible hose 3 and an elastic clamp 4 clamped and installed on the flexible hose 3;
[0031] The stainless steel pipe 2 consists of a steel pipe body 21 and a double-protruding head 22 located at one end of the steel pipe body 21. The flexible hose 3 is sleeved and installed on the double-protruding head 22.
[0032] The double-protruding head 22 includes a connecting pipe 11, a first-end bulge 12, and a last-end bulge 13. The end face of the last-end bulge 13 away from the connecting pipe 11 is fixedly connected to the steel pipe body 21. One end face of the hose 3 is in contact with the outer surface of the last-end bulge 13. The diameter of the last-end bulge 13 is larger than the outer diameter of the hose 3. The inner surface of the hose 3 is in contact with the connecting pipe 11 and the outer surface of the first-end bulge 12. The elastic clamp 4 is located between the first-end bulge 12 and the last-end bulge 13. The diameter of the last-end bulge 13 is 10.5 mm, and the diameter of the first-end bulge 12 is 7.2 mm. The diameter of the first-end bulge 12 is larger than the inner diameter of the hose 3.
[0033] The differential pressure pipe assembly 1 is composed of a stainless steel pipe 2, a flexible hose 3, and an elastic clamp 4. The flexible hose 3 is made of silicone, which has a certain vibration resistance, giving the differential pressure pipe assembly 1 good assembly adaptability. The double-protrusion head 22 is processed using a one-piece molding process with a reduced diameter bulge, eliminating the traditional welding process. This improves the strength and sealing performance of the double-protrusion head 22, further increases processing speed, and reduces manufacturing costs. Since the diameter of the end bulge 13 is larger than the outer diameter of the flexible hose 3, it can limit the movement of the flexible hose 3. Since the diameter of the beginning bulge 12 is larger than the inner diameter of the flexible hose 3, it can effectively lock the flexible hose 3 in conjunction with the elastic clamp 4, effectively preventing the flexible hose 3 from detaching from the double-protrusion head 22. This greatly improves the sealing performance of the product and gives it good anti-pull-out and fatigue resistance, which is beneficial for practical use.
[0034] like Figure 2 and Figure 3 As shown, the interior of the double-protrusion head 22 is hollow, and the interior of the double-protrusion head 22 is connected to the interior of the steel pipe body 21, which can ensure that the fluid can flow inside the steel pipe body 21 and the double-protrusion head 22.
[0035] like Figure 2 As shown, the stainless steel pipe 2 is integrally formed, which can improve the strength and pressure resistance of the stainless steel pipe 2 itself, and give the stainless steel pipe 2 a longer service life.
[0036] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.
Claims
1. A leak-proof differential pressure pipe, comprising a differential pressure pipe assembly (1), characterized in that, The differential pressure assembly (1) includes a stainless steel pipe (2), a flexible hose (3), and an elastic clamp (4) installed on the flexible hose (3). The stainless steel pipe (2) consists of a steel pipe body (21) and a double-protruding head (22) located at one end of the steel pipe body (21). The flexible hose (3) is sleeved and installed on the double-protruding head (22). The double-protruding head (22) includes a connecting pipe (11), a front bulge (12) and a rear bulge (13), and the end face of the rear bulge (13) away from the connecting pipe (11) is fixedly connected to the steel pipe body (21).
2. The leak-proof differential pressure pipe according to claim 1, characterized in that, One end face of the hose (3) is in contact with the outer surface of the end bulge (13), and the diameter of the end bulge (13) is greater than the outer diameter of the hose (3).
3. The leak-proof differential pressure pipe according to claim 1, characterized in that, The inner surface of the hose (3) is in contact with the outer surface of the connecting pipe (11) and the head bulge (12).
4. A leak-proof differential pressure pipe according to claim 1, characterized in that, The elastic clamp (4) is located between the first bulge (12) and the last bulge (13).
5. A leak-proof differential pressure pipe according to claim 1, characterized in that, The interior of the double-protruding head (22) is hollow, and the interior of the double-protruding head (22) is connected to the interior of the steel pipe body (21).
6. A leak-proof differential pressure pipe according to claim 1, characterized in that, The diameter of the end bulge (13) is 10.5 mm, and the diameter of the head bulge (12) is 7.2 mm. The diameter of the head bulge (12) is greater than the inner diameter of the hose (3).
7. A leak-proof differential pressure pipe according to claim 1, characterized in that, The stainless steel pipe (2) is integrally formed.