Valve plate length detection tool

Abstract

This application discloses a valve disc length detection fixture, relating to the field of workpiece inspection technology. It includes a base, a first side plate, and a second side plate, which are disposed on opposite sides of the base. The side wall of the first side plate near the second side plate is a first planar wall, and the side wall of the second side plate near the first side plate is a first inclined wall. The valve disc slides on the base, with one end of the valve disc along its length abutting the first planar wall of the first side plate, and the other end moving to abut against the first inclined wall of the second side plate. A reference line is provided on the top of either the first or second side plate. When detecting the valve disc length, the valve disc is placed on the base with one end along its length abutting the first planar wall of the first side plate. The valve disc slides on the base. When the other end along its length abuts against the first inclined wall of the second side plate, the valve disc can no longer move. At this point, the sliding position of the scraper is determined by the reference line, thereby enabling rapid detection of the valve disc length.

Description

Technical Field

[0001] This application relates to the field of workpiece inspection technology, and in particular to a valve plate length inspection fixture. Background Technology

[0002] As a core component of a vacuum pump, the valve plate is a precision-engineered cuboid with precision U-shaped grooves machined at both ends along its length and width. The dimensional accuracy of the valve plate, especially its length, directly determines the sealing performance and overall performance of the vacuum pump. Therefore, each valve plate must undergo rigorous dimensional inspection before leaving the factory.

[0003] Currently, the industry commonly uses vernier calipers for manual inspection. Operators need to manually position and clamp the valve plate, and repeatedly measure and read values ​​at multiple feature points such as its body and U-groove. The entire process is not only cumbersome and time-consuming, but the accuracy and consistency of the measurement results also heavily rely on the operator's experience, resulting in extremely low overall inspection efficiency. Utility Model Content

[0004] To improve the detection efficiency of valve plates, this application provides a valve plate length detection fixture.

[0005] The valve disc length detection fixture provided in this application adopts the following technical solution:

[0006] A valve disc length detection fixture includes a base, a first side plate, and a second side plate. The first side plate and the second side plate are symmetrically fixed on both sides of the base. The side wall of the first side plate near the second side plate is a first planar wall, and the side wall of the second side plate near the first side plate is a first inclined wall. The valve disc slides on the base, with one end of the valve disc in the length direction abutting against the first planar wall of the first side plate, and the other end moving to abut against the first inclined wall of the second side plate. A reference line is provided on the top of the first side plate or the second side plate.

[0007] By adopting the above technical solution, when detecting the length of the valve plate, the valve plate is placed on the base, with one end of the valve plate in the length direction attached to the first flat wall of the first side plate. The valve plate is slid on the base. When the other end of the valve plate in the length direction abuts against the first inclined wall of the second side plate, the valve plate can no longer move. At this time, the sliding position of the scraper is determined by the baseline, so that the length of the valve plate can be quickly detected.

[0008] Preferably, both the first and second side plates are provided with multiple bolts at equal intervals along their own length, and the bolts are threaded and fixed in the base.

[0009] By adopting the above technical solution, multiple bolts are used to fix the first side plate and the second side plate, making the first side plate and the second side plate more stable when installed on the base.

[0010] Preferably, grooves are provided on both opposite side walls of the base, and the bolts are fixed in the grooves of the base.

[0011] By adopting the above technical solution, the bolt passes through the first side plate or the second side plate and is fixed in the base from the groove of the base, thereby further improving the stability of the installation of the first side plate and the second side plate.

[0012] Preferably, a pad is placed on the base, the bottom wall of the pad abuts against and fits against the top wall of the base, and the opposite side walls of the pad abut against the first planar wall of the first side plate and the first inclined wall of the second side plate, respectively.

[0013] By adopting the above technical solution, after the testing fixture has been used for testing for a long time, the first inclined wall of the second side plate will wear down, which will reduce the testing accuracy. At this time, the pad is placed on the base, which raises the contact position between the valve plate and the first inclined wall, so that accurate testing can continue.

[0014] Preferably, the thickness of the pad is greater than the thickness of the valve plate.

[0015] By adopting the above technical solution, the thickness of the pad is greater than the thickness of the valve plate, so that after the pad is placed on the base, the valve plate will no longer come into contact with the wear area of ​​the first inclined wall, thereby further improving the detection accuracy.

[0016] Preferably, the slope of the first inclined wall is 1:500-1:1500.

[0017] Preferably, it further includes a push block, which is slidably placed on the base and abuts against the valve plate. A push rod is slidably arranged on the side of the push block away from the valve plate along the sliding direction of the valve plate. An elastic element is sleeved on the push rod, and a retaining ring is fixedly arranged on the push rod. One end of the elastic element abuts against the retaining ring, and the other end abuts against the push block.

[0018] By adopting the above technical solution, after the valve plate is placed on the base, the push block is placed on the base. The push rod drives the push block to move through the push ring and the elastic element. The push block drives the valve plate to move. When the valve plate is stuck against the first inclined wall and cannot move, the push rod will squeeze the elastic element through the push ring. At this time, the operator can stop pushing the valve plate.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. When detecting the length of the valve plate using the first inclined wall of the second side plate, the valve plate is placed on the base with one end of the valve plate in the length direction attached to the first flat wall of the first side plate. The valve plate is slid on the base. When the other end of the valve plate in the length direction abuts against the first inclined wall of the second side plate, the valve plate can no longer move. At this time, the sliding position of the scraper is determined by the baseline, so that the length of the valve plate can be quickly detected.

[0021] 2. Using bolts and grooves, multiple bolts are used to fix the first side plate and the second side plate. After the bolts pass through the first side plate or the second side plate, they are fixed in the base from the groove of the base, thereby improving the stability of the installation of the first side plate and the second side plate.

[0022] 3. After the testing fixture has been used for a long time, the first inclined wall of the second side plate will wear down, which will reduce the testing accuracy. At this time, the pad is placed on the base, which raises the contact position between the valve plate and the first inclined wall, so that accurate testing can continue. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the valve plate length detection fixture in Embodiment 1 of this application;

[0024] Figure 2 This is an exploded view of the overall structure of the valve plate length detection fixture in Embodiment 1 of this application, to highlight the first inclined wall;

[0025] Figure 3 This is an exploded view of the overall structure of the valve plate length detection fixture in Embodiment 1 of this application, highlighting the first planar wall;

[0026] Figure 4 This is a front view of the overall structure of the valve plate length detection fixture in Embodiment 1 of this application;

[0027] Figure 5 For this application Figure 4 Enlarged view of point A in the middle;

[0028] Figure 6 This is a schematic diagram of the overall structure of the valve plate length detection fixture in Embodiment 2 of this application;

[0029] Figure 7 This is a schematic diagram of the overall structure of the valve plate length detection fixture in Embodiment 3 of this application.

[0030] Reference numerals: 1. Base; 2. First side plate; 3. Second side plate; 4. First flat wall; 5. First inclined wall; 6. Valve plate; 7. Baseline; 8. Bolt; 9. Groove; 10. Pad; 11. Push block; 12. Push rod; 13. Elastic element; 14. Retaining ring; 15. Second flat wall; 16. Second inclined wall. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0032] This application discloses a valve plate length detection fixture.

[0033] Example 1:

[0034] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A valve disc length detection fixture includes a cuboid base 1, a first side plate 2, and a second side plate 3. The first side plate 2 and the second side plate 3 are detachably and fixedly installed on both sides of the base 1 in the width direction. A reference line 7 is engraved on the top wall of both the first side plate 2 and the second side plate 3. The length of the base 1 is equal to the length of the first side plate 2 and the second side plate 3, and the thickness of the base 1 is less than the height of the first side plate 2 and the second side plate 3.

[0035] Three bolts 8 are installed at equal intervals along their own length in both the first side plate 2 and the second side plate 3. Grooves 9 are opened in the middle of both side walls along their own length in the width direction of the base 1. The bolts 8 are located in the grooves 9 and are threaded and fixed in the base 1.

[0036] The side wall of the first side plate 2 near the base 1 is a first flat wall 4, and the side wall of the base 1 near the first side plate 2 is a second flat wall 15. The first flat wall 4 abuts against and fits against the second flat wall 15. The side wall of the second side plate 3 near the base 1 is a first inclined wall 5, and the side wall of the base 1 near the second side plate 3 is a second inclined wall 16. The inclination directions of the first inclined wall 5 and the second inclined wall 16 are opposite, and the second inclined wall 16 abuts against and fits against the second inclined wall 16. The inclination angle of the first inclined wall 5 and the second inclined wall 16 is 1:500-1:1500, preferably 1:1000.

[0037] The implementation principle of a valve plate length detection fixture in this application embodiment is as follows: During the detection of the valve plate 6 length, the valve plate 6 to be tested is first stably placed on the detection base 1, ensuring that one end of the valve plate 6 in the length direction precisely conforms to the first planar wall 4 of the first side plate 2. Then, the valve plate 6 is smoothly slid along the surface of the base 1 until the other end of the valve plate 6 in the length direction abuts against the first inclined wall 5 of the second side plate 3. At this point, the valve plate 6 cannot move further due to the physical constraint of the first inclined wall 5. By observing the relative position of the edge of the valve plate 6 and the reference line 7, it is possible to accurately and efficiently determine whether the length of the valve plate 6 meets the specifications. If the valve plate 6 exceeds the reference line 7, the valve plate 6 is too long; if the valve plate 6 does not reach the reference line 7, the valve plate 6 is too short.

[0038] Example 2:

[0039] Reference Figure 6 The difference between this embodiment and Embodiment 1 is that a pad 10 is placed on the base 1, and the thickness of the pad 10 is greater than the thickness of the valve plate 6. The bottom wall of the pad 10 abuts against and fits against the top wall of the base 1, one side wall of the pad 10 in the width direction abuts against and fits against the first planar wall 4 of the first side plate 2, and the other side wall of the pad 10 in the width direction abuts against and fits against the second planar wall 15 of the second side plate 3.

[0040] The implementation principle of Embodiment 2 of this application is as follows: During the long-term performance of valve plate 6 length detection, the first inclined wall 5 of the second side plate 3 is continuously subjected to mechanical contact and friction from the valve plate 6, causing its working surface to gradually wear down, thus reducing the detection accuracy of the detection fixture. To restore the reliability of the detection fixture, a pad 10 can be added to the base 1. The pad 10 raises the mounting reference plane of the valve plate 6, causing the contact position between the valve plate 6 and the first inclined wall 5 to move upward during sliding detection, effectively avoiding the original wear area. This not only extends the service life of the detection fixture but also significantly improves the repeatability and accuracy of the detection data.

[0041] Example 3:

[0042] Reference Figure 7 The difference between this embodiment and Embodiment 1 is that a push block 11 is slidably placed on the base 1, and the length of the push block 11 is less than the length of the valve plate 6. The push block 11 abuts against the valve plate 6 and is used to push the valve plate 6 to slide on the base 1. A push rod 12 is slidably installed on the middle of the side wall of the push block 11 away from the valve plate 6 along the length direction of the base 1, and a retaining ring 14 is fixedly installed on the push rod 12. An elastic element 13 is sleeved on the push rod 12, and the two ends of the elastic element 13 abut against the retaining ring 14 and the push block 11 respectively. In this application, the elastic element 13 can be a spring.

[0043] The implementation principle of Embodiment 3 of this application is as follows: During the length detection of valve plate 6, valve plate 6 and push block 11 are placed sequentially on base 1. The operator applies a pushing force to push rod 12. Push rod 12 smoothly transmits the driving force to push block 11 through push ring and elastic element 13 at its front end, thereby pushing valve plate 6 to move along the reference direction of base 1. When the distal end of valve plate 6 contacts the first inclined wall 5 of the second side plate 3 and reaches the mechanical stop, the movement of valve plate 6 stops; at this time, under the continuous pushing force, push rod 12 axially compresses elastic element 13 through push ring, causing elastic element 13 to produce controllable elastic deformation. This deformation process provides the operator with a clear force feedback signal, indicating that the detection endpoint has been reached, and the operator can immediately stop the pushing action. Through elastic transmission and buffer design, rigid impact and overload friction are effectively avoided, significantly reducing the wear risk of the contact surface between valve plate 6 and first inclined wall 5, and extending the service life of the detection fixture while ensuring detection accuracy.

[0044] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A valve plate length detection fixture, characterized in that: The system includes a base (1), a first side plate (2), and a second side plate (3). The first side plate (2) and the second side plate (3) are symmetrically fixed on both sides of the base (1). The side wall of the first side plate (2) near the second side plate (3) is a first planar wall (4), and the side wall of the second side plate (3) near the first side plate (2) is a first inclined wall (5). The slope of the first inclined wall (5) is 1:500-1:1500. A valve plate (6) slides on the base (1). One end of the valve plate (6) along its length is attached to the first planar wall (4) of the first side plate (2), and the other end moves to abut against the first inclined wall (5) of the second side plate (3). A reference line (7) is provided on the top of the first side plate (2) or the second side plate (3).

2. The valve plate length detection fixture according to claim 1, characterized in that: Multiple bolts (8) are provided at equal intervals along their own length in both the first side plate (2) and the second side plate (3), and the bolts (8) are threaded and fixed in the base (1).

3. The valve plate length detection fixture according to claim 2, characterized in that: The base (1) has grooves (9) on its opposite side walls, and the bolts (8) are fixed in the grooves (9) of the base (1).

4. The valve plate length detection fixture according to claim 1, characterized in that: A pad (10) is placed on the base (1). The bottom wall of the pad (10) abuts against and fits against the top wall of the base (1). The opposite side walls of the pad (10) abut against the first flat wall (4) of the first side plate (2) and the first inclined wall (5) of the second side plate (3), respectively.

5. The valve plate length detection fixture according to claim 4, characterized in that: The thickness of the pad (10) is greater than the thickness of the valve plate (6).

6. The valve plate length detection fixture according to claim 1, characterized in that: It also includes a push block (11), which is slidably placed on the base (1) and abuts against the valve plate (6). A push rod (12) is slidably provided on the side of the push block (11) away from the valve plate (6) along the sliding direction of the valve plate (6). An elastic element (13) is sleeved on the push rod (12). A retaining ring (14) is fixedly provided on the push rod (12). One end of the elastic element (13) abuts against the retaining ring (14), and the other end abuts against the push block (11).

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