Micro-leakage accurate testing device
By designing a micro leakage precision test device for detecting the sealing of valve core and spring seat, the problem of difficulty in accurately measuring the sealing of contact surfaces in the prior art is solved, and the sealing of valve core and spring seat connection is achieved. Accurate inspection simplifies the maintenance process and reduces costs.
Patent Information
- Application Number
- CN202411653943.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-02-18
AI Technical Summary
The prior art is difficult to accurately measure the sealing of the contact surface between the valve core and the spring seat, which makes it difficult to solve the internal leakage problem of the product, and the repair and replacement process is complicated and the cost is high.
A micro-leak precision test device is designed, including a housing, mounting seat, storage chamber, oil inlet passage, test chamber and positioning bracket, and the sealing between the valve core and the spring seat is accurately detected by the test medium outflow.
Accurate testing of sealing at the valve core and spring seat connections is achieved, simplifying the repair and replacement process, reducing costs, and improving product quality and operating stability.
Smart Images
Figure CN119469563A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of testing tooling, and in particular to a precise testing device for micro-leakage between a valve core and a spring seat. Background Art
[0002] In the complex structural system of the entire product, the contact surface between the tested valve core and the tested spring seat is a crucial part, and it is one of the core positions that cause internal leakage problems in the product. In the long and delicate processing process of the product, the wear quality detection of the contact surface here faces great difficulties. Due to its special structural design and assembly relationship, only when all the parts of the product are assembled, can the wear quality of the contact surface be measured. However, even in this case, the measurement results obtained cannot directly and accurately reflect the wear quality of the contact surface itself. Because this measurement value is actually a comprehensive reflection of all factors that may cause internal leakage in the entire product, which includes a variety of complex influencing factors, such as tiny gaps between other parts, subtle defects in sealing materials, etc. And once there is a problem with the wear quality of this contact surface, subsequent maintenance and replacement work will face many difficulties. Maintenance personnel need to disassemble the entire product, which is not only time-consuming and labor-intensive, but may also damage other intact parts. At the same time, finding suitable replacement parts is not easy. It may require special customization or screening from a large number of models, which undoubtedly increases maintenance costs and product downtime, and will have serious negative impacts on both production and use.
[0003] It is worth noting that the contact surface between the tested valve core and the tested spring seat is one of the core locations that cause internal leakage of the product. During the product processing, the grinding quality here can only be measured after the product is fully assembled. However, this still cannot directly express the grinding quality of this part, but is a comprehensive expression of all internal leakage, accompanied by problems such as difficulty in maintenance and replacement. This situation has repeatedly occurred in the production, testing, and subsequent use and maintenance of each product, and has become one of the key bottlenecks restricting product quality improvement and stable operation, bringing huge economic losses and technical challenges to the company. Whether from the perspective of product design optimization or from the direction of improvement of processing technology, how to accurately measure and effectively control the sealing of the contact surface between the measuring valve core and the spring seat can effectively reduce the cost of subsequent maintenance and replacement. Summary of the invention
[0004] In order to solve the above problems, an embodiment of the present invention provides a micro-leakage precision testing device for detecting the sealing of the connection between the valve core and the spring seat. It can not only accurately test whether there is leakage but also has a simple structure and is easy to use and carry.
[0005] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a micro-leakage precision testing device, comprising a shell, a mounting seat is arranged at the lower part of the shell, a storage cavity for installing the valve core is arranged at the upper part of the mounting seat, an oil inlet channel connected to the storage cavity is arranged at the lower part, a test chamber is arranged at the upper part of the shell, an oil outlet is arranged at one end of the test chamber, a positioning bracket for installing a spring seat is arranged in the test chamber, and a threaded sleeve for connecting the mounting seat is arranged at the lower part of the shell.
[0006] As a further improvement of the above technical solution:
[0007] A sealing member sleeved on the valve core is arranged in the storage cavity.
[0008] The positioning bracket comprises a limit plate close to one end of the oil outlet, and both ends of the limit plate are provided with extension rods which are in contact with the inner side wall of the shell.
[0009] A limiting boss used in conjunction with the limiting plate is arranged on the inner side wall of the oil outlet.
[0010] The utility model also comprises a cushion block arranged in the test chamber, wherein the cushion block is located at the connection between the spring seat and the valve core.
[0011] A through hole for penetrating a valve core is arranged in the middle of the cushion block, and an oil discharge channel is arranged on the side wall of the cushion block.
[0012] The oil discharge channel is arc-shaped and is located on the side wall of the cushion block.
[0013] The number of the oil discharge channels is multiple and they are evenly distributed at the lower part of the cushion block along the circumferential direction of the cushion block.
[0014] The beneficial effects of the embodiments of the present invention are as follows: the micro-leakage precision testing device comprises a shell, which is a hollow cylindrical design, a detachable mounting seat is connected to the lower part of the shell, a storage cavity for mounting a valve core is provided on the upper part of the mounting seat, an oil inlet channel connected to the storage cavity is provided on the lower part of the shell, a test chamber is provided on the upper part of the shell, an oil outlet is provided on the end of the test chamber away from the mounting seat, a positioning bracket for mounting a spring seat is provided in the test chamber, a threaded sleeve is provided at the lower part of the shell for connecting the mounting seat, the mounting seat and the shell are detachably connected by threads, after the test medium enters the tooling from the oil inlet, it enters the valve core through the oil inlet channel on the valve core, one end of the spring seat is sleeved on the end of the valve core, and the other end abuts against the oil outlet, the connection between the spring seat and the valve core is in a non-completely sealed state, and the test medium will flow out from the oil outlet, the structure of the entire test tooling is simple, and it is convenient to carry and use, and at the same time, the contact mode between the various components is single, and the sealing test can be performed according to different types of valve cores, and the scope of application is wide. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of Example 1;
[0016] Figure 2 is a cross-sectional view of Example 1;
[0017] Figure 3 is a schematic structural diagram of the positioning bracket in Example 1;
[0018] Figure 4 is a cross-sectional view of Example 2;
[0019] Figure 5 This is a schematic diagram of the structure of the cushion block in Example 2.
[0020] In the figure: 1. Shell; 2. Mounting seat; 3. Storage cavity; 4. Oil inlet channel; 5. Seal; 6. Test chamber; 7. Positioning bracket; 8. Threaded sleeve; 9. Limit plate; 10. Extension rod; 12. Oil outlet; 13. Limit boss; 15. Pad; 16. Through hole; 17. Oil drain channel. DETAILED DESCRIPTION
[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.
[0022] Example 1
[0023] like Figure 1-3 As shown, the micro-leakage precision testing device of this embodiment includes a shell 1, which is a hollow cylindrical design. A detachable mounting seat 2 is connected to the lower part of the shell 1. The upper part of the mounting seat 2 is provided with a storage cavity 3 for mounting a valve core, and the lower part is provided with an oil inlet channel 4 connected with the storage cavity 3. A test chamber 6 is provided at the upper part of the shell 1, and an oil outlet 12 is provided at one end of the test chamber 6 away from the mounting seat 2. A positioning bracket 7 for mounting a spring seat is provided in the test chamber 6, and a threaded sleeve 8 for connecting the mounting seat 2 is provided at the lower part of the shell 1. The mounting seat 2 and the housing 1 are detachably connected via threads. After the test medium enters the tooling from the oil inlet channel 4, it enters the valve core through the oil inlet channel 4 on the valve core. One end of the spring seat is sleeved on the end of the valve core, and the other end abuts against the oil outlet 12. The connection between the spring seat and the valve core is in a non-completely sealed state, and the test medium will flow out from the oil outlet 12. The structure of the entire test tooling is simple, and it is easy to carry and use. At the same time, the contact method between the various components is single, and the sealing test can be performed according to different types of valve cores, and the application range is wide.
[0024] A sealing member 5 sleeved on the valve core is provided in the storage cavity 3. The sealing member 5 adopts an O-ring. A limit platform for installing the sealing member 5 is provided on the outer wall of the valve core. The function of the sealing member 5 is to prevent the test medium from directly entering the housing 1 and then leaking outward, thereby hindering the observation of the test personnel and affecting the test results.
[0025] The positioning bracket 7 includes a limit plate 9 near one end of the oil outlet 12, and extension rods 10 are provided at both ends of the limit plate 9 to fit the inner wall of the shell 1. The two extension rods 10 and the limit plate 9 are distributed in a U shape, and the spring seat is installed between the two extension rods 10.
[0026] A limiting boss 13 is provided on the inner side wall of the oil outlet 12 for use with the limiting plate 9. Both ends of the limiting plate 9 abut against the inner side wall of the limiting boss 13 to determine the axial position of the spring seat in advance to prevent the spring seat from axially sliding during the test operation and affecting the test results.
[0027] Example 2
[0028] The difference from Example 1 is that Figure 4-5 As shown: the micro-leakage precision testing device also includes a gasket 15 arranged in the test chamber 6. The gasket 15 is located at the connection between the spring seat and the valve core. The function of the gasket 15 is to change the distance between the valve core and the spring seat. The maximum height of the gasket 15 is less than the insertion depth of the valve core in the spring seat. It is used to study the sealing of the connection between the spring seat and the valve core under different working conditions.
[0029] A through hole 16 for penetrating the valve core is provided in the middle of the cushion block 15, and a flow gap is preset between the inner wall of the through hole 16 and the outer wall of the valve core (that is, the diameter of the through hole 16 is larger than the outer diameter of the valve core) to avoid the outflow of the test medium due to the design of the cushion block 15, which can effectively improve the test effect. An oil drain channel 17 is provided on the side wall of the cushion block 15. If leakage occurs, the test medium will be discharged through the oil drain channel 17.
[0030] The oil drain channel 17 is arc-shaped and is located on the side wall of the pad 15. There are multiple oil drain channels 17 and they are evenly distributed on the lower part of the side wall of the pad 15 along the circumferential direction of the pad 15. The shape of the oil drain channel 17 can be designed in various ways. Its main purpose is to open a channel on the pad 15 for the outflow of the test medium, which can accelerate the outflow of the circulating medium and facilitate the test personnel to observe the test results.
[0031] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.
[0034] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A micro-leakage precision testing device, characterized in that: It comprises a housing (1), a mounting seat (2) being arranged at the lower part of the housing (1), a placement cavity (3) for mounting a valve core being arranged at the upper part of the mounting seat (2), and an oil inlet passage (4) communicating with the placement cavity (3) being arranged at the lower part; A test chamber (6) is arranged at the upper part of the housing (1), an oil outlet (12) is arranged at one end of the test chamber (6), a positioning bracket (7) for mounting a spring seat is arranged in the test chamber (6), and a threaded sleeve (8) for connecting to a mounting seat (2) is arranged at the lower part of the housing (1).
2. The micro-leakage precision testing device according to claim 1, characterized in that: A sealing member (5) sleeved on the valve core is arranged in the storage cavity (3).
3. The micro-leakage precision testing device according to claim 1, characterized in that: The positioning bracket (7) comprises a limit plate (9) at one end close to the oil outlet (12), and both ends of the limit plate (9) are provided with extension rods (10) that are in contact with the inner wall of the housing (1).
4. The micro-leakage precision testing device according to claim 3, characterized in that: A limiting boss (13) for use with the limiting plate (9) is provided on the inner side wall of the oil outlet (12).
5. The micro-leakage precision testing device according to claim 1, characterized in that: The invention also comprises a cushion block (15) arranged in the test chamber (6), wherein the cushion block (15) is located at the connection between the spring seat and the valve core.
6. The micro-leakage precision testing device according to claim 5, characterized in that: A through hole (16) for penetrating a valve core is provided in the middle of the cushion block (15), and an oil discharge channel (17) is provided on the side wall of the cushion block (15).
7. The micro-leakage precision testing device according to claim 6, characterized in that: The oil discharge channel (17) is arc-shaped and is located on the side wall of the cushion block (15).
8. The micro-leakage precision testing device according to claim 7, characterized in that: The oil discharge channels (17) are multiple in number and are evenly distributed at the lower part of the cushion block (15) along the circumferential direction of the cushion block (15).