A valve core hardness detection device and its detection method

Abstract

The present invention discloses a valve core hardness detection device and a detection method thereof, which relate to the field of valve core detection technology. The detection device comprises a mounting component, comprising a mounting seat and an arc frame arranged on the top of the mounting seat; and a positioning component, comprising a positioning cylinder structure, a switching wheel arranged on the side of the positioning cylinder structure and a receiving structure arranged on the top of the positioning cylinder structure; and a hardness tester; wherein, the positioning cylinder structure comprises a rotating cylinder, the top of the rotating cylinder is provided with an outer wall positioning part, and the end of the rotating cylinder away from the outer wall positioning part is provided with an inner wall positioning part. When the hardness of the valve core is detected, the receiving structure will apply an upward force to the pressed part of the valve core under the action of the positioning cylinder structure to ensure the accuracy of the detection result. The positioning cylinder structure is divided into an outer wall positioning part and an inner wall positioning part. When the hardness of the valve core is detected, the valve core can be simply positioned differently for its inner wall detection and outer wall detection.

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 an inner wall positioning portion is provided at one end of the rotating cylinder away from the outer 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 inner wall of the cylindrical valve core upward on the receiving structure and use a hardness tester to detect the hardness of its inner wall.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] First, when detecting the hardness of the valve core, under the action of the positioning cylinder structure, the receiving structure will apply an upward force to the pressed part of the valve core to ensure the accuracy of the detection result.

[0024] Second, the positioning cylinder structure is divided into an outer wall positioning part and an inner wall positioning part. When detecting the hardness of the valve core, different positions for detecting the inner wall and the outer wall of the valve core can be simply carried out, further ensuring the accuracy of the detection result. Description of the Drawings

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

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

[0027] Figure 3 is a schematic diagram of the structure of the positioning member of the present invention;

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

[0029] Figure 5 is a schematic diagram of the structure of the outer wall positioning part of the present invention;

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

[0031] Figure 7 is a schematic diagram of the structure of the inner wall positioning part of the present invention;

[0032] Figure 8 is a cross-sectional view of the inner wall positioning part 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] Hardness tester 3, preferably, the hardness tester 3 is a Rockwell hardness tester 3. The Rockwell hardness tester 3 will first apply an initial load (usually 10 kgf) to the surface of the test material, bringing the indenter (diamond or steel ball) into contact with the material surface. The indenter will press into the material surface to form an indentation. Then, a total load is applied (this load is variable and depends on the hardness range of the material being tested). When the total load is applied, the indentation depth of the indenter will reach a maximum value. Then, the extra applied force is removed, leaving only the initial load. At this time, the indenter will slightly rebound from the material surface. The hardness tester 3 calculates the hardness value by measuring the change in indentation depth (i.e., the difference in indentation depth under the total load and the initial load). When using the Rockwell hardness tester 3 to detect the valve core, the detection device can help position the valve core through the initially applied force. 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 stressed part, to complete the positioning and ensure accurate detection.

[0038] Among them, the positioning cylinder structure 21 includes a rotating cylinder 211. An outer wall positioning part 212 is provided at the top of the rotating cylinder 211. When it is necessary to detect the hardness of the outer wall of the valve core, the outer wall positioning part 212 faces upward, and the outer wall of the valve core is placed upward on the receiving structure 23. The rotating cylinder 211 applies support to the receiving structure 23. When detecting the hardness of the valve core, an upward force is applied to the arc top of the valve core to ensure accurate detection. An inner wall positioning part 213 is provided at one end of the rotating cylinder 211 away from the outer wall positioning part 212. When detecting the hardness of the inner wall of the valve core, the rotating cylinder 211 is pulled out away from the mounting seat 11 by using the switching wheel 22, then the rotating cylinder 211 is rotated 180°, and then the rotating cylinder 211 is pushed toward the mounting seat 11, so that the inner wall positioning part 213 applies support to the receiving structure 23. At this time, the inner wall of the valve core is placed upward on the receiving structure 23. When the hardness tester 3 detects the hardness of the valve core, the receiving structure 23 will apply an upward force to the arc bottom of the valve core to ensure accurate detection.

[0039] During operation, first cut the cylindrical valve core in half, place one of the semi-cylindrical valve cores with its outer wall upward on the receiving structure 23. When the Rockwell hardness tester 3 detects the valve core, the rotating cylinder 211 applies support to 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, place the semi-cylindrical valve core with its inner wall upward on the receiving structure 23. When the Rockwell hardness tester 3 detects the valve core, the rotating cylinder 211 applies support to the receiving structure 23 and applies an upward force to the arc bottom of the valve core to ensure accurate detection.

[0040] Embodiment 2, on the basis of Embodiment 1, improve the process of the positioning cylinder structure 21 applying support to the receiving structure 23 when detecting the outer wall of the valve core. The specific method can be seen 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 to 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 slideway 2131 formed on the outer wall of the rotating cylinder 211. Fourth inclined slideways 2132 are formed on both sides of the third inclined slideway 2131. A receiving groove 2133 is formed on the side of the fourth inclined slideway 2132. During the conversion process of converting the outer wall positioning portion 212 in contact with the receiving structure 23 into the inner wall positioning portion 213, when the rotating cylinder 211 is pushed towards the mounting base 11, the intermediate top block 231 and the receiving plate will slide along the third inclined slideway 2131 and the fourth inclined slideway 2132 into the interior of the receiving groove 2133. An arc-shaped rocker 2134 is arranged inside the receiving groove 2133. A connecting shaft 2135 is arranged at the top of the arc-shaped rocker 2134. A sliding frame 2137 is arranged on the outer wall of the connecting shaft 2135. The connecting shaft 2135 can slide and rotate inside the sliding frame 2137. An intermediate top plate 2136 is arranged at the top of the sliding frame 2137. A side top plate 2138 is arranged at one end of the arc-shaped rocker 2134 away from the intermediate top plate 2136. The side top plate 2138 can rotate to a certain extent on the arc-shaped rocker 2134. In the idle state, due to the relatively large mass of the intermediate top plate 2136, the intermediate top plate 2136 will exert a downward pressure on the arc-shaped rocker 2134. Therefore, one end of the arc-shaped rocker 2134 close to the intermediate top plate 2136 will move downward. At this time, the side top plate 2138 will slide upward under the action of the arc-shaped rocker 2134. When detecting the hardness of the inner wall of the valve core, the bottom of the intermediate top block 231 is in contact with the top of the intermediate top plate 2136, and the bottom of the slide plate 2321 is in contact with 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 is in contact with the inner top arc surface 2323 at the top of the slide plate 2321. The valve core exerts a downward pressure on the slide plates 2321 on both sides of the bottom. The slide plates 2321 will exert a downward pressure on the side top plate 2138. Therefore, the slide plates 2321 will drive the arc-shaped rocker 2134 to slide downward. The arc-shaped rocker 2134 will then drive the intermediate top plate 2136 to slide upward, driving the positioning top plate 2311 to exert an upward supporting force on the middle of the valve core. The positioning is completed. At this time, the hardness tester 3 presses the valve core for hardness detection, which can ensure the accuracy of the detection result. At the same time, the positioning is convenient. It only needs to place the valve core above the slide plate 2321.

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

[0050] During operation, after placing the valve core on the receiving structure 23, the outer wall of the valve core contacts the inner top arc surface 2323 at the top of the slide plate 2321. The valve core exerts a downward pressure on the slide plates 2321 on both sides of the bottom. The slide plates 2321 will exert a downward pressure on the side top plates 2138. Then, the slide plates 2321 will drive the arc-shaped rocker 2134 to slide downward. The arc-shaped rocker 2134 will then drive the middle top plate 2136 to slide upward, driving the positioning top plate 2311 to exert an upward supporting force on the middle part of the valve core, completing the positioning. At this time, the hardness tester 3 presses the valve core for hardness detection, which can ensure the accuracy of the detection result.

[0051] Meanwhile, this embodiment also provides a detection method for 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 up on the receiving structure 23, and use the hardness tester 3 to detect the hardness of its outer wall;

[0054] S3: Remove the valve core, use the switching wheel 22 to switch the direction of the rotating cylinder 211 to make the inner wall positioning part 213 face up;

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

[0056] The standard parts used in this embodiment can be directly purchased from the market. For the non-standard structural components described in the specification and drawings, they can also be directly processed without any doubt according to the existing technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machines, parts and equipment all adopt the conventional models in the existing technology. Therefore, no specific description will be made here.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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), an outer wall positioning portion (212) is arranged at the top of the rotating cylinder (211), and an inner wall positioning portion (213) is arranged at one end of the rotating cylinder (211) away from the outer wall positioning portion (212); The top of the mounting seat (11) is provided with an arc-shaped groove (12), a circular rotating frame (13) is provided on the side of the arc-shaped groove (12), the arc-shaped frame (14) is provided on the top of the arc-shaped groove (12), a top sliding frame (15) is provided on the top of the arc-shaped frame (14), and side sliding frames (16) are provided on both sides of the top sliding frame (15); The receiving structure (23) comprises an intermediate 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 intermediate top block (231), and the side receiving plates (232) are arranged on the inner wall of the side slide (16); 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), a lifting groove (2123) is opened on the side of the second inclined slide (2122), and a middle top surface (2124) is opened on the side of the first inclined slide (2121); 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).

2. The valve core hardness testing device according to claim 1, 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).

3. The valve core hardness testing device according to claim 2, 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).

4. The valve core hardness testing device according to claim 3, 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).

5. The valve core hardness testing device according to claim 4, 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).

6. A method for testing valve core hardness testing equipment, characterized in that: The valve core hardness detection device is a valve core hardness detection device according to any one of claims 1 to 5, and the detection method 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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