Valve core end face length screening gauge
By designing a valve core end face length screening fixture, the valve core qualification is determined by different work positions and locations of the detection plate. This solves the problems of low detection efficiency and insufficient accuracy in the existing technology, and realizes fast and accurate valve core screening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-31
AI Technical Summary
The existing technology has low efficiency and insufficient accuracy in detecting the length of the valve core end face, which makes it easy for defective products to be mixed in with qualified products.
A valve core end face length screening fixture was designed. By installing a first detection plate and a second detection plate in parallel on a mounting plate to form a detection cavity, and setting up go gauge, no-go gauge and premium product detection stations, the qualification of the valve core is determined by the different positions and lengths of the detection plates.
It enables rapid and accurate screening of qualified and superior valve cores, improves testing efficiency and accuracy, reduces manual measurement workload, and avoids reading errors.
Smart Images
Figure CN224066044U_ABST
Abstract
Description
Technical Field
[0001] This application relates to a valve core end face length screening gauge, belonging to the technical field of testing tools. Background Technology
[0002] The valve core is the core component of a valve, responsible for achieving basic functions such as directional control, pressure control, or flow control. It is typically made of metal materials, such as copper, steel, or stainless steel. Based on their operating principle, valve cores can be divided into two types: rotary and rotary-type. Rotary valve cores are suitable for high-pressure and high-temperature conditions, offering advantages such as rapid switching and low leakage; while rotary valve cores are suitable for low-pressure and low-temperature conditions, providing better sealing performance.
[0003] Existing steering gear valve cores have strict quality requirements regarding their axial length at the factory. The axial length of the valve core is the length of the valve body between its two end faces, excluding the step length on the top side of the valve. The axial length of the valve core directly affects the normal operation of the steering gear. If the axial length does not meet the standard, the steering gear may experience valve core jamming or even complete seizure during use. Currently, after the valve core is manufactured, its end face length is often measured manually using handheld length measuring tools. This method is labor-intensive and prone to errors in reading, leading to inaccurate judgments and low measurement accuracy. It also increases the possibility of defective products being mixed with qualified products. Therefore, a valve core end face length gauge is needed to solve the problems of low inspection efficiency and low measurement accuracy associated with the current method of manually measuring the valve core end face length using handheld length measuring tools. Utility Model Content
[0004] In view of the problems and shortcomings of the existing technology, this application provides a valve core end face length screening gauge to solve the above-mentioned technical problems.
[0005] To achieve the above objectives, this application provides the following technical solution: a valve core end face length screening fixture, comprising a mounting plate, a first detection plate, and a second detection plate, wherein the first detection plate and the second detection plate are mounted opposite to and parallel to the mounting plate, forming a detection cavity for the valve core between them; one of the first detection plate and the second detection plate is mounted opposite to the other detection plate at different positions on the mounting plate to form detection stations with different detection lengths.
[0006] Specifically, the first detection plate is vertically fixed on the mounting plate to form an L-shaped structure, and the first detection plate is located on the horizontal side of the L-shape, forming a support plate for the valve core; the second detection plate is installed on the mounting plate above the first detection plate, forming a limiting plate for the end face of the valve core.
[0007] Specifically, there are at least two second detection plates, and each second detection plate is installed at intervals on the mounting plate, forming at least two detection stations with the first detection plate.
[0008] Specifically, in the inspection station, the inspection station with the inspection length as the upper limit of the allowable tolerance of the valve core end face length is defined as a GO gauge inspection station, and the inspection station with the inspection length as the lower limit of the allowable tolerance of the valve core end face length is defined as a NO gauge inspection station. This application achieves rapid inspection of the axial length of the valve core by setting up GO gauge and NO gauge inspection stations. If the valve core to be tested can pass through the GO gauge inspection station but not the NO gauge inspection station, it is judged that the axial length of the valve core meets the design requirements, i.e., it is considered a qualified product. This allows for rapid and accurate determination of whether the valve core to be tested is qualified, improving inspection efficiency and accuracy.
[0009] Specifically, the testing station should include at least one go gauge testing station and one no-go gauge testing station.
[0010] Specifically, the inspection station where the inspected length falls between the upper limit and lower limit of the allowable tolerance for the standard valve core end face length is defined as the superior product inspection station. This application, by setting up a superior product inspection station, aims to further refine the quality grade of qualified products based on customer needs, after identifying qualified products, and to screen out superior products from among the qualified ones, thereby improving product applicability.
[0011] Specifically, there are three second inspection plates, which are installed at intervals on the mounting plate, forming three inspection stations with the first inspection plate. The three inspection stations are divided into one go gauge inspection station, one no-go gauge inspection station and one premium product inspection station according to the inspection length.
[0012] Specifically, the side of the second detection plate furthest from the mounting plate is recessed inward to form a mounting groove whose shape matches the end of the valve core. The valve core is installed in the detection cavity by abutting against the support plate at one end and against the limiting plate at the other end. This design allows for quick and accurate positioning of the product under test through the mounting groove during testing, thereby improving testing efficiency.
[0013] Compared with the prior art, the beneficial effects of this application are as follows:
[0014] 1. This application achieves the positioning and installation of the valve core under test by mounting a first detection plate and a second detection plate opposite to and parallel to each other on a mounting plate. The first and second detection plates form a detection cavity for the valve core under test, thereby achieving the positioning and installation of the valve core. The installation length between the first and second detection plates is used as the judgment length for determining the end face length of the valve core under test, so as to quickly and accurately detect whether the axial length of the valve core under test meets the production requirements, thereby achieving rapid screening of whether the valve core under test is a qualified product. The screening fixture of this application does not require length measurement, which reduces the workload of manual measurement and increases the detection efficiency.
[0015] 2. Building upon the foregoing, to improve testing accuracy, this application establishes at least two second testing plates, spaced apart on a mounting plate, to form at least two testing stations. The testing station whose testing length is the upper limit of the allowable tolerance for the standard valve core end face length is defined as a go-gauge testing station, and the testing station whose testing length is the lower limit of the allowable tolerance for the standard valve core end face length is defined as a stop-gauge testing station. This application uses the standard valve core end face length as the criterion for determining whether the valve core under test is a qualified product, eliminating the need for handheld length measuring instruments during testing and preventing low testing accuracy due to operator reading errors.
[0016] 3. Based on the foregoing, this application provides three second inspection plates. Furthermore, the inspection stations in this application include a station defined as a superior product inspection station where the inspection length falls between the upper limit and lower limit of the allowable tolerance for the standard valve core end face length. These three second inspection stations constitute one go gauge inspection station, one no-go gauge inspection station, and one superior product inspection station. This allows for the detection of qualified, unqualified, and superior products in a single inspection, thereby improving product applicability.
[0017] 4. Based on the foregoing, the mounting plate, first detection plate, and second detection plate of this application adopt a split structure. The first and second detection plates are fixedly mounted on the mounting plate, making the screening fixture of this application simple in structure and easy to maintain daily. After long-term use, damaged parts can be replaced or repaired individually without replacing the entire fixture. The screening fixture of this application is convenient to use, highly flexible, suitable for different working environments, and not limited by space.
[0018] 5. Based on the foregoing, the second detection plate of this application is provided with a mounting groove that is compatible with the end of the valve core, so as to enable the product to be tested to be quickly and accurately positioned through the mounting groove during testing, thereby improving testing efficiency. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the valve core end face length screening fixture in this embodiment;
[0020] Figure 2 This is a top view of the valve core end face length screening fixture in this embodiment (valve core not shown).
[0021] Figure 3 This is a side view of the valve core end face length screening fixture in this embodiment. Detailed Implementation
[0022] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. For clarity, the axial length of the valve core to be tested in this embodiment is: the axial length of the standard valve core is 82.8 mm. 0 -0.01 The allowable upper limit of the tolerance length is 82.88 mm. 0 -0.01 mm, the lower limit of the allowable tolerance length is 82.8 mm. 0 -0.01 The axial length of the valve core in the superior product of this embodiment is 82.84 mm. 0 -0.01 mm. It should be noted that the numerical suffixes of the above-mentioned standard valve core axial length, upper limit of allowable tolerance length, lower limit of allowable tolerance length, and axial length of valve core for superior products are machining error ranges, not allowable tolerance ranges.
[0023] Please see Figures 1-3 This embodiment discloses a valve core end face length screening fixture, including a mounting plate 2, a first detection plate 1 and a second detection plate 3. The first detection plate and the second detection plate are installed opposite to and parallel to each other on the mounting plate, forming a detection cavity for the valve core 4 between them. One of the first detection plates 1 and the second detection plate 3 is installed opposite to the other detection plate at different positions on the mounting plate to form detection stations with different detection lengths.
[0024] In this embodiment, the first detection plate 1 is vertically fixedly installed on the mounting plate 2 to form an L-shaped structure, and the first detection plate is located on the horizontal side of the L-shape, forming a support plate for the valve core; the second detection plate 3 is installed on the mounting plate above the first detection plate, forming a limiting plate for the end face of the valve core. In this embodiment, the side of the second detection plate away from the mounting plate is recessed inward to form a mounting groove 5 whose shape is adapted to the end of the valve core; the valve core is installed in the detection cavity by abutting against the support plate at one end face and against the limiting plate at the other end face.
[0025] In this embodiment, there are three second inspection plates, which are installed at intervals on the mounting plate, forming three inspection stations with the first inspection plate. In this embodiment, the inspection station with the inspection length defined as the upper limit of the allowable tolerance of the standard valve core end face length is defined as a go-go inspection station; the inspection station with the inspection length defined as the lower limit of the allowable tolerance of the standard valve core end face length is defined as a stop-go inspection station; and the inspection station with the inspection length located between the upper and lower limits of the allowable tolerance of the standard valve core end face length is defined as a superior product inspection station. Therefore, the three inspection stations in this embodiment are divided into one go-go inspection station, one stop-go inspection station, and one superior product inspection station based on the inspection length. (See also...) Figure 1 In this embodiment, the three second detection plates of the valve core end face length screening gauge are fixedly installed at intervals on the mounting plate to form three detection stations from left to right. The detection station on the left is a go gauge type detection station with a detection length of 82.88 mm. 0 -0.01 mm, the inspection station on the right is a stop gauge inspection station, and its inspection length is 82.8 mm. 0 -0.01 mm, while the middle inspection station is the superior product inspection station, with an inspection length of 82.84 mm. 0 -0.01 mm.
[0026] Working Principle: In this embodiment, the valve core end face length screening fixture is used by the operator to sequentially install the valve cores to be tested into the left-hand inspection station. If the valve core can pass through the go gauge inspection station, it is then installed into the right-hand inspection station. If the valve core cannot pass through the no-go gauge inspection station, it is considered a qualified product. If the valve core can pass through the no-go gauge inspection station, it indicates that the machined length of the valve core is less than the axial length of the standard valve core, and it is considered a defective product. If the valve core cannot pass through the go gauge inspection station on the first inspection, it indicates that the machined length of the valve core is greater than the axial length of the standard valve core, and it is also considered a defective product.
[0027] Once the valve core under test is determined to be a qualified product, it needs to be installed in the intermediate superior product inspection station to determine whether it is a superior product. If the valve core passes the superior product inspection station, it indicates that although the machining length of the valve core meets the qualified product standard, it fails to meet the superior product standard, and therefore is ultimately judged as a qualified product that does not meet the superior product standard. Conversely, if the valve core fails to pass the superior product inspection station, it indicates that the machining length of the valve core meets the superior product standard, and it is judged as a superior product.
[0028] The embodiments of this application have been described in detail above. However, this application is not limited to the above embodiments. For those skilled in the art, after learning the contents recorded in this application, several equivalent changes and substitutions can be made without departing from the principle of this application. These equivalent changes and substitutions should also be considered to fall within the protection scope of this application.
Claims
1. A valve core end face length screening fixture, comprising a mounting plate, a first detection plate, and a second detection plate, characterized in that: The first detection plate and the second detection plate are mounted opposite each other and parallel to the mounting plate, forming a detection cavity for the valve core between them; one of the first detection plates and the second detection plate is mounted opposite the other detection plate at different positions on the mounting plate to form detection stations with different detection lengths.
2. The valve core end face length screening fixture according to claim 1, characterized in that: The first detection plate is vertically fixed on the mounting plate to form an L-shaped structure, and the first detection plate is located on the horizontal side of the L-shape, forming a support plate for the valve core; the second detection plate is installed on the mounting plate above the first detection plate, forming a limiting plate for the end face of the valve core.
3. The valve core end face length screening fixture according to claim 2, characterized in that: The number of the second detection plates is at least two, and each second detection plate is installed at intervals on the mounting plate, forming at least two detection stations with the first detection plate.
4. The valve core end face length screening fixture according to claim 3, characterized in that: Among the testing stations, the testing station that uses the testing length as the upper limit of the allowable tolerance of the standard valve core end face length is defined as a go gauge testing station, and the testing station that uses the testing length as the lower limit of the allowable tolerance of the standard valve core end face length is defined as a stop gauge testing station.
5. The valve core end face length screening fixture according to claim 4, characterized in that: The testing stations include at least one go gauge testing station and one no-go gauge testing station.
6. The valve core end face length screening fixture according to claim 4, characterized in that: Among the inspection stations, the inspection station whose inspection length is between the upper limit of the allowable tolerance length of the standard valve core end face and the lower limit of the allowable tolerance length of the standard valve core end face is defined as the superior product inspection station.
7. The valve core end face length screening fixture according to claim 6, characterized in that: There are three second inspection plates, which are installed at intervals on the mounting plate, forming three inspection stations with the first inspection plate. The three inspection stations are divided into one go gauge inspection station, one no-go gauge inspection station and one premium product inspection station according to the inspection length.
8. The valve core end face length screening fixture according to claim 2, characterized in that: The second detection plate has an inwardly recessed side away from the mounting plate, forming a mounting groove whose shape matches the end of the valve core; the valve core is installed in the detection cavity by abutting one end face against the support plate and the other end face against the limiting plate.