Valve element hardness detection equipment and detection method thereof

Abstract

The invention discloses a valve core hardness detection device and a detection method thereof, and relates to the technical field of valve core detection, the detection device comprises a mounting member comprising a mounting seat and an arc-shaped frame arranged on the top of the mounting seat; the positioning component comprises a positioning cylinder structure, a switching wheel arranged on the side face of the positioning cylinder structure and a bearing structure arranged at the top of the positioning cylinder structure. And, a durometer; wherein the positioning cylinder structure comprises a rotating cylinder, an outer wall positioning part is arranged at the top of the rotating cylinder, an inner wall positioning part is arranged at the end, away from the outer wall positioning part, of the rotating cylinder, and when hardness detection is conducted on the valve element, the bearing structure can apply upward force to the pressed position of the valve element under the action of the positioning cylinder structure; the structure of the positioning cylinder is divided into the outer wall positioning part and the inner wall positioning part, and when the hardness of the valve element is detected, different positioning aiming at inner wall detection and outer wall detection of the valve element can be simply carried out on the valve element.

Description

Technical Field

[0001] The present invention relates to the technical field of valve core detection, in particular to a valve core hardness detection device and a detection method thereof. Background Art

[0002] The valve core is a key component in the valve. It is installed inside the valve, usually between the valve body and the valve seat. The main function of the valve core is to control the flow of fluid, and the valve is opened and closed by moving the valve core. The valve core is generally used in pressure places and requires corresponding strength. The staff needs to test the hardness of the valve core when processing the valve core. Due to different working conditions, there are valve cores of different shapes and designs, including cylindrical valve cores.

[0003] When performing hardness testing on a cylindrical valve core, the staff must not only test the outer wall of the valve core, but also the inner wall of the valve core. However, when using a hardness tester for hardness testing, since a hardness reference object is generally required to press the valve core being tested, a supporting force is required on the opposite side of the pressure-bearing surface of the valve core to balance the pressure applied by the hardness tester to ensure accurate test results. However, due to its structural reasons, there is currently no suitable fixture to position the cylindrical valve core. If a hardness tester is used directly to press it, the pressure on the cylindrical valve core will be dispersed by the arc plate structure, resulting in inaccurate final test results. At the same time, there is no systematic method to quickly test the inner and outer walls. Summary of the invention

[0004] The object of the present invention is to provide a valve core hardness detection device and a detection method thereof to solve at least one technical problem existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: a valve core hardness detection device, comprising a mounting component, including a mounting seat and an arc frame arranged on the top of the mounting seat; and,

[0006] A positioning member, comprising a positioning cylinder structure, a switching wheel arranged on a side of the positioning cylinder structure, and a receiving structure arranged on a top of the positioning cylinder structure; and,

[0007] Hardness tester;

[0008] Wherein, the positioning cylinder structure comprises a rotating cylinder, the top of the rotating cylinder is provided with an outer wall positioning portion, and one end of the rotating cylinder away from the outer wall positioning portion is provided with an inner wall positioning portion.

[0009] Preferably, an arc-shaped groove is provided at the top of the mounting seat, an annular rotating frame is provided on the side of the arc-shaped groove, the arc-shaped frame is provided at the top of the arc-shaped groove, a top slide is provided at the top of the arc-shaped frame, and side slides are provided on both sides of the top slide.

[0010] Preferably, the receiving structure comprises a middle top block arranged on the inner wall of the top slide, and side receiving plates are arranged on both sides of the middle top block, and the side receiving plates are arranged on the inner wall of the side slide.

[0011] Preferably, the intermediate top block comprises a positioning top plate, the top of the positioning top plate is provided with a semicircular top surface, and the bottom of the positioning top plate is provided with a first sliding arc surface.

[0012] Preferably, the edge receiving plate comprises a slide plate, a receiving groove is arranged on the top of the slide plate, an inner top arc surface is arranged on the side surface of the receiving groove, and a second sliding arc surface is arranged on the bottom of the slide plate.

[0013] Preferably, the outer wall positioning portion includes a first inclined slide opened on the outer wall of the rotating drum, second inclined slides are opened on both sides of the first inclined slide, lifting grooves are opened on the sides of the second inclined slide, and a middle top surface is opened on the sides of the first inclined slide.

[0014] Preferably, the inner wall of the lifting groove is in contact with the slide plate, an elastic member is provided at the bottom of the lifting groove, a positioning groove is provided on the side of the elastic member, and a bottom support plate is provided at the top of the positioning groove.

[0015] Preferably, the inner wall positioning portion includes a third inclined slide opened on the outer wall of the rotating drum, fourth inclined slides are opened on both sides of the third inclined slide, a receiving groove is opened on the side of the fourth inclined slide, an arc-shaped seesaw is arranged inside the receiving groove, a connecting shaft is arranged on the top of the arc-shaped seesaw, a sliding frame is arranged on the outer wall of the connecting shaft, an intermediate top plate is arranged on the top of the sliding frame, and a side top plate is arranged at the end of the arc-shaped seesaw away from the intermediate top plate.

[0016] Preferably, a lifting slide surface is provided inside the accommodating groove, the inner wall of the lifting slide surface is in contact with the middle top plate, side limit blocks are provided on both sides of the top of the middle top plate, and a bottom limit block is provided at the bottom of the middle top plate.

[0017] The present invention also provides a detection method of a valve core hardness detection device, which comprises:

[0018] S1: Cut the cylindrical valve core into a semi-cylindrical shape;

[0019] S2: Place the cylindrical valve core with its outer wall facing upward on the receiving structure, and use a hardness tester to test the hardness of its outer wall;

[0020] S3: Remove the valve core and use the switching wheel to switch the direction of the drum so that the inner wall positioning part faces upward;

[0021] S4: Place the cylindrical valve core with its inner wall facing upward on the receiving structure, and use a hardness tester to test the hardness of its inner wall.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. When the hardness of the valve core is tested, the receiving structure, under the action of the positioning tube structure, will exert an upward force on the compressed part of the valve core to ensure the accuracy of the test result.

[0024] 2. The positioning tube structure is divided into an outer wall positioning part and an inner wall positioning part. When testing the hardness of the valve core, the valve core can be simply positioned differently for inner wall testing and outer wall testing, further ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the mounting seat of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the positioning component of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the receiving structure of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the outer wall positioning portion of the present invention;

[0030] Figure 6 is a cross-sectional view of the outer wall positioning portion of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the inner wall positioning portion of the present invention;

[0032] Figure 8 It is a cross-sectional view of the inner wall positioning portion of the present invention.

[0033] In the figure: 1, mounting member; 11, mounting seat; 12, arc groove; 13, annular rotating frame; 14, arc frame; 15, top slide; 16, side slide; 2, positioning member; 21, positioning cylinder structure; 22, switching wheel; 23, receiving structure; 3, hardness tester; 231, middle top block; 232, side receiving plate; 2311, positioning top plate; 2312, semicircular top surface; 2313, first sliding arc surface; 2321, slide plate; 2322, receiving groove; 2323, inner top arc surface; 2324, second sliding arc surface; 211, rotating cylinder; 212, outer Wall positioning part; 213, inner wall positioning part; 2121, first inclined slide; 2122, second inclined slide; 2123, lifting groove; 2124, middle top surface; 2125, positioning groove; 2126, elastic member; 2127, bottom support plate; 2131, third inclined slide; 2132, fourth inclined slide; 2133, accommodating groove; 2134, arc-shaped seesaw; 2135, connecting shaft; 2136, middle top plate; 2137, sliding frame; 2138, side top plate; 2139, bottom limit block; 2140, side limit block; 2141, lifting slide surface. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] For example, see Figures 1 to 8 The present invention provides a technical solution: a valve core hardness detection device, comprising a mounting member 1, comprising a mounting seat 11 and an arc frame 14 arranged on the top of the mounting seat 11, the mounting seat 11 is installed on the hardness tester 3 to provide support for the positioning member 2, and the middle axis of the mounting seat 11 is preferably located on the same straight line as the pressing point of the hardness tester 3; and

[0036] The positioning member 2 includes a positioning cylinder structure 21, a switching wheel 22 arranged on the side of the positioning cylinder structure 21, and a receiving structure 23 arranged on the top of the positioning cylinder structure 21. The positioning cylinder structure 21 is installed on the top of the mounting seat 11. When the hardness of the valve core is tested, the valve core is positioned by the receiving structure 23. When the hardness of the valve core is tested by the hardness tester 3, the receiving structure 23 can directly apply an accurate reaction force to the middle part of the valve core, that is, the pressure-bearing part of the valve core, to ensure that the test result is accurate and intuitive. Preferably, the staff cuts the cylindrical valve core into two halves in advance to facilitate the hardness test of the inner wall and the outer wall of the valve core; and,

[0037] The hardness tester 3 is preferably a Rockwell hardness tester 3. The Rockwell hardness tester 3 first applies an initial load (usually 10 kgf) to the surface of the test material, so that the indenter (diamond or steel ball) contacts the surface of the material, and the indenter presses into the surface of the material to form an indentation. Then, a total load is applied (this load is variable, depending on the hardness range of the tested material). After the total load is applied, the indentation depth of the indenter reaches a maximum value, and then the additional force is removed, leaving only the initial load. At this time, the indenter will rebound slightly from the surface of the material, and the hardness tester 3 calculates the hardness value by measuring the change in the indentation depth (i.e., the difference in indentation depth under the total load and the initial load). When the Rockwell hardness tester 3 is used to detect the valve core, the detection device can help the valve core position by the initial force applied. This initial load is generally applied slowly. While applying this force, the bearing structure will apply a reaction force to the middle part of the valve core, i.e., the pressure-bearing part, to complete the positioning and ensure accurate detection.

[0038] The positioning cylinder structure 21 includes a rotating cylinder 211, and an outer wall positioning portion 212 is arranged on the top of the rotating cylinder 211. When the hardness test of the outer wall of the valve core is required, the outer wall positioning portion 212 is upward, and the outer wall of the valve core is placed upward on the receiving structure 23. The rotating cylinder 211 supports the receiving structure 23. When the hardness test of the valve core is performed, an upward force is applied to the arc top of the valve core to ensure accurate detection. The inner wall positioning portion 212 is arranged on one end of the rotating cylinder 211 away from the outer wall positioning portion 212. 3. When testing the hardness of the inner wall of the valve core, use the switching wheel 22 to pull the rotating cylinder 211 away from the mounting seat 11, then rotate the rotating cylinder 211180°, and then push the rotating cylinder 211 towards the mounting seat 11, so that the inner wall positioning portion 213 supports the receiving structure 23. At this time, the inner wall of the valve core is placed on the receiving structure 23 with the inner wall facing upward. When the hardness tester 3 performs hardness testing on the valve core, the receiving structure 23 will apply an upward force to the arc bottom of the valve core to ensure accurate testing.

[0039] During operation, the cylindrical valve core is first cut into two halves, and one of the semi-cylindrical valve cores is placed on the receiving structure 23 with its outer wall facing upwards. When the Rockwell hardness tester 3 detects the valve core, the rotating cylinder 211 supports the receiving structure 23 and applies an upward force to the arc top of the valve core to ensure accurate detection. After the outer wall detection is completed, the semi-cylindrical valve core is placed on the receiving structure 23 with its inner wall facing upwards. When the Rockwell hardness tester 3 detects the valve core, the rotating cylinder 211 supports the receiving structure 23 and applies an upward force to the arc bottom of the valve core to ensure accurate detection.

[0040] Embodiment 2 improves the process of the positioning cylinder structure 21 supporting the receiving structure 23 when the outer wall of the valve core is detected on the basis of embodiment 1. The specific method can be referred to in Figures 1 to 6 ;

[0041] like Figure 3 As shown, an arc groove 12 is provided at the top of the mounting seat 11, and an annular rotating frame 13 is provided on the side of the arc groove 12. The annular rotating frame 13 and the arc groove 12 are connected as a whole at one end of the mounting seat 11. The positioning cylinder structure 21 can rotate in the arc groove 12 and can also slide in the arc groove 12. The arc frame 14 is provided at the top of the arc groove 12. A top slide 15 is provided at the top of the arc frame 14. Side slides 16 are provided on both sides of the top slide 15. The top slide 15 and the side slide 16 provide support for the supporting structure 23.

[0042] like Figure 4 As shown, the supporting structure 23 includes an intermediate top block 231 arranged on the inner wall of the top slide 15, and the intermediate top block 231 can slide up and down inside the fixed slide. Side supporting plates 232 are arranged on both sides of the intermediate top block 231, and the side supporting plates 232 are arranged on the inner wall of the side slide 16. The side supporting plates 232 can slide up and down inside the side slide 16.

[0043] The middle top block 231 includes a positioning top plate 2311, and a semicircular top surface 2312 is provided on the top of the positioning top plate 2311. When the valve core is positioned, the semicircular top surface 2312 contacts the valve core to provide an upward force to the valve core. The contact position is on the opposite side of the valve core and the hardness tester 3 steel ball pressing down the valve core. A first sliding arc surface 2313 is provided at the bottom of the positioning top plate 2311. The side receiving plate 232 includes a slide plate 2321. A receiving groove 2322 is provided on the top of the slide plate 2321, and an inner top arc surface 2323 is provided on the side of the receiving groove 2322. A second sliding arc surface 2324 is provided at the bottom of the slide plate 2321. When the outer wall positioning portion 212 and the inner wall positioning portion 213 are switched by using the rotating drum 211, the positioning top plate 2311 and the slide plate 2321 need to slide relative to each other on the rotating drum 211, and the sliding arc surfaces provided at their bottoms can ensure smooth sliding.

[0044] like Figures 5 and 6As shown, the outer wall positioning portion 212 includes a first inclined slide 2121 opened on the outer wall of the rotating drum 211, and second inclined slides 2122 are opened on both sides of the first inclined slide 2121. A lifting groove 2123 is opened on the side of the second inclined slide 2122, and an intermediate top surface 2124 is opened on the side of the first inclined slide 2121. The inner wall of the lifting groove 2123 contacts the slide plate 2321. When it is necessary to perform a hardness test on the outer wall of the valve core, the valve core is placed above the receiving structure 23, and the cut surface of the cylindrical valve core contacts the receiving groove 2322. The two ends of the bottom of the cylindrical valve core will apply downward pressure to the slide plate 2321, and the middle part of the valve core will contact the positioning top plate 2311. The bottom of the lifting groove 2123 is provided with an elastic member 2126, and the elastic member 21 A positioning groove 2125 is provided on the side of 26, and a bottom support plate 2127 is provided on the top of the positioning groove 2125. The elastic member 2126 is in a compressed state, and the bottom support plate 2127 is fixed at the top of the positioning groove 2125 by the elastic member 2126. When the valve core is placed on the receiving groove 2322, the two ends of the bottom of the valve core will exert downward pressure on the slide plate 2321. At this time, the slide plate 2321 will be pressed downward, so the semicircular top surface 2312 on the top of the positioning top plate 2311 will exert an upward supporting force on the valve core. At this time, when the hardness of the valve core is tested by the hardness tester 3, the receiving structure 23 will accurately provide a reverse supporting force for the valve core at the pressed position to ensure the accuracy of the test result. At the same time, the positioning of the receiving structure 23 is simple, and the valve core only needs to be placed on the receiving structure 23.

[0045] During operation, the outer wall of the valve core is placed upward on the receiving groove 2322, and the two ends of the bottom of the cylindrical valve core will apply downward pressure to the slide plate 2321, and the middle part of the valve core will contact the positioning top plate 2311. The semicircular top surface 2312 on the top of the positioning top plate 2311 will apply an upward supporting force to the valve core. At this time, when the hardness of the valve core is tested by the hardness tester 3, the receiving structure 23 will accurately provide reverse supporting force for the valve core at the pressed position to ensure the accuracy of the test result.

[0046] Embodiment 3, based on the above embodiment, further describes the process of the positioning cylinder structure 21 supporting the receiving structure 23 when detecting the outer wall of the valve core, and the specific method is as follows:

[0047] After completing the hardness test of the outer wall of the valve core and removing the valve core, we need to convert the positioning cylinder structure 21 and convert the outer wall positioning portion 212 in contact with the receiving structure 23 into the inner wall positioning portion 213. At this time, the switching wheel 22 is used to pull the rotating cylinder 211 in the direction away from the mounting seat 11, and the middle top block 231 and the side receiving plate 232 will move upward under the action of the first inclined slide 2121 and the second inclined slide 2122, and because the movement is restricted by the arc frame 14 in the axial direction of the rotating cylinder 211, the middle top block 231 and the side receiving plate 232 will move to the end of the rotating cylinder 211 away from the inner wall positioning portion 213. At this time, the switching wheel 22 is used to rotate the rotating cylinder 211 180°, and then the rotating cylinder 211 is pushed in the direction close to the mounting seat 11, so that the middle top block 231 and the side receiving plate 232 will come to the inside of the inner wall positioning portion 213.

[0048] like Figure 7As shown, the inner wall positioning portion 213 includes a third inclined slide 2131 opened on the outer wall of the rotating drum 211, and fourth inclined slides 2132 are opened on both sides of the third inclined slide 2131. The side of the fourth inclined slide 2132 is opened with a receiving groove 2133. In the process of converting the outer wall positioning portion 212 contacting the receiving structure 23 into the inner wall positioning portion 213, when the rotating drum 211 is pushed in the direction close to the mounting seat 11, the middle top block 231 and the receiving plate will slide along the third inclined slide 2131 and the fourth inclined slide 2132 to the inside of the receiving groove 2133. The interior of the accommodating groove 2133 is provided with an arc-shaped seesaw 2134, the top of the arc-shaped seesaw 2134 is provided with a connecting shaft 2135, the outer wall of the connecting shaft 2135 is provided with a sliding frame 2137, the connecting shaft 2135 can slide and rotate inside the sliding frame 2137, the top of the sliding frame 2137 is provided with an intermediate top plate 2136, the end of the arc-shaped seesaw 2134 away from the intermediate top plate 2136 is provided with a side top plate 2138, the side top plate 2138 can rotate on the arc-shaped seesaw 2134 to a certain extent, in the idle state, due to the mass of the intermediate top plate 2136 The middle top plate 2136 exerts downward pressure on the arc-shaped seesaw plate 2134, so that the end of the arc-shaped seesaw plate 2134 close to the middle top plate 2136 moves downward, and at this time, the side top plate 2138 slides upward under the action of the arc-shaped seesaw plate 2134. When the hardness of the inner wall of the valve core is tested, the bottom of the middle top block 231 contacts the top of the middle top plate 2136, and the bottom of the slide plate 2321 contacts the top of the side top plate 2138. After the valve core is placed on the receiving structure 23, the outer wall of the valve core and the inner top arc surface 2138 of the top of the slide plate 2321 are in contact with each other. 323 are in contact, the valve core applies downward pressure to the slides 2321 on both sides of the bottom, and the slides 2321 apply downward pressure to the side top plates 2138, so the slides 2321 will drive the arc-shaped rocker plate 2134 to slide downward, and the arc-shaped rocker plate 2134 will then drive the middle top plate 2136 to slide upward, driving the positioning top plate 2311 to apply a supporting force upward to the middle part of the valve core, and the positioning is completed. At this time, the hardness tester 3 presses the valve core to perform hardness testing, which can ensure the accuracy of the test results. At the same time, the positioning is convenient, and the valve core only needs to be placed above the slide 2321.

[0049] like Figure 8 As shown, a lifting slide 2141 is provided inside the accommodating groove 2133, and the inner wall of the lifting slide 2141 is in contact with the middle top plate 2136. The middle top plate 2136 slides inside the lifting slide 2141. Side limit blocks 2140 are provided on both sides of the top of the middle top plate 2136. When the inner wall positioning portion 213 is downward, the side limit blocks 2140 will protect the middle top plate 2136 from moving too much. A bottom limit block 2139 is provided at the bottom of the middle top plate 2136. When the inner wall positioning portion 213 is upward, the middle top plate 2136 will sink, and the bottom limit block 2139 can prevent the middle top plate 2136 from moving too much.

[0050] During operation, after the valve core is placed on the receiving structure 23, the outer wall of the valve core contacts the inner top arc surface 2323 of the top of the slide plate 2321, and the valve core applies downward pressure to the slide plates 2321 on both sides of the bottom, and the slide plate 2321 applies downward pressure to the side top plate 2138, so the slide plate 2321 will drive the arc-shaped rocker plate 2134 to slide downward, and the arc-shaped rocker plate 2134 will then drive the middle top plate 2136 to slide upward, driving the positioning top plate 2311 to apply a supporting force upward to the middle part of the valve core, and the positioning is completed. At this time, the hardness tester 3 presses the valve core for hardness testing, which can ensure the accuracy of the test results.

[0051] At the same time, this embodiment also provides a detection method of a valve core hardness detection device, which includes:

[0052] S1: Cut the cylindrical valve core into a semi-cylindrical shape;

[0053] S2: Place the cylindrical valve core with its outer wall facing upward on the receiving structure 23, and use a hardness tester 3 to test the hardness of its outer wall;

[0054] S3: Remove the valve core and use the switching wheel 22 to switch the direction of the rotating drum 211 so that the inner wall positioning portion 213 faces upward;

[0055] S4: Place the cylindrical valve core with its inner wall facing upward on the receiving structure 23, and use a hardness tester 3 to test the hardness of its inner wall.

[0056] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve core hardness testing device, characterized in that: include: A mounting component (1) comprises a mounting seat (11) and an arc-shaped frame (14) arranged on the top of the mounting seat (11); as well as, A positioning member (2) comprises a positioning tube structure (21), a switching wheel (22) arranged on the side of the positioning tube structure (21), and a receiving structure (23) arranged on the top of the positioning tube structure (21); and, Hardness tester (3); The positioning cylinder structure (21) comprises a rotating cylinder (211), the top of the rotating cylinder (211) is provided with an outer wall positioning portion (212), and an inner wall positioning portion (213) is provided at one end of the rotating cylinder (211) away from the outer wall positioning portion (212).

2. The valve core hardness testing device according to claim 1, characterized in that: The top of the mounting seat (11) is provided with an arc-shaped groove (12), the side of the arc-shaped groove (12) is provided with an annular rotating frame (13), the arc-shaped frame (14) is arranged on the top of the arc-shaped groove (12), the top of the arc-shaped frame (14) is provided with a top slide frame (15), and side slide frames (16) are provided on both sides of the top slide frame (15).

3. The valve core hardness testing device according to claim 2, characterized in that: The receiving structure (23) comprises a middle top block (231) arranged on the inner wall of the top slide (15), and side receiving plates (232) are arranged on both sides of the middle top block (231), and the side receiving plates (232) are arranged on the inner wall of the side slide (16).

4. The valve core hardness testing device according to claim 3, characterized in that: The intermediate top block (231) comprises a positioning top plate (2311), the top of the positioning top plate (2311) is provided with a semicircular top surface (2312), and the bottom of the positioning top plate (2311) is provided with a first sliding arc surface (2313).

5. The valve core hardness testing device according to claim 4, characterized in that: The edge receiving plate (232) comprises a slide plate (2321), the top of the slide plate (2321) is provided with a receiving groove (2322), the side of the receiving groove (2322) is provided with an inner top arc surface (2323), and the bottom of the slide plate (2321) is provided with a second sliding arc surface (2324).

6. The valve core hardness testing device according to claim 5, characterized in that: The outer wall positioning portion (212) comprises a first inclined slide (2121) opened on the outer wall of the rotating drum (211), second inclined slides (2122) are opened on both sides of the first inclined slide (2121), lifting grooves (2123) are opened on the sides of the second inclined slide (2122), and a middle top surface (2124) is opened on the sides of the first inclined slide (2121).

7. The valve core hardness testing device according to claim 6, characterized in that: The inner wall of the lifting groove (2123) is in contact with the slide plate (2321), an elastic member (2126) is provided at the bottom of the lifting groove (2123), a positioning groove (2125) is provided on the side of the elastic member (2126), and a bottom support plate (2127) is provided at the top of the positioning groove (2125).

8. The valve core hardness testing device according to claim 7, characterized in that: The inner wall positioning portion (213) comprises a third inclined slide (2131) provided on the outer wall of the rotating drum (211), fourth inclined slides (2132) are provided on both sides of the third inclined slide (2131), a receiving groove (2133) is provided on the side of the fourth inclined slide (2132), an arc-shaped seesaw (2134) is provided inside the receiving groove (2133), a connecting shaft (2135) is provided at the top of the arc-shaped seesaw (2134), a sliding frame (2137) is provided on the outer wall of the connecting shaft (2135), an intermediate top plate (2136) is provided at the top of the sliding frame (2137), and a side top plate (2138) is provided at one end of the arc-shaped seesaw (2134) away from the intermediate top plate (2136).

9. The valve core hardness testing device according to claim 8, characterized in that: A lifting slide (2141) is provided inside the accommodating groove (2133), and the inner wall of the lifting slide (2141) is in contact with the middle top plate (2136). Side limit blocks (2140) are provided on both sides of the top of the middle top plate (2136), and a bottom limit block (2139) is provided at the bottom of the middle top plate (2136).

10. A method for testing valve core hardness testing equipment, characterized in that: The detection method of the valve core hardness detection device comprises the following steps: S1: Cut the cylindrical valve core into a semi-cylindrical shape; S2: placing the cylindrical valve core with its outer wall facing upward on the receiving structure (23), and testing the hardness of its outer wall using a hardness tester (3); S3: Remove the valve core and use the switching wheel (22) to switch the direction of the rotating drum (211) so that the inner wall positioning portion (213) faces upward; S4: Place the cylindrical valve core with its inner wall facing upward on the receiving structure (23), and use a hardness tester (3) to test the hardness of its inner wall.

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