Multi-point hardness detection device for special equipment

Abstract

The invention relates to a multi-point hardness detection device for special equipment, and belongs to the field of hardness detection equipment.The multi-point hardness detection device comprises a detection probe for detecting hardness, a plurality of lead screws are annularly arrayed in a bottom box, the lead screws are arranged in the radial direction of the bottom box and rotationally installed in the bottom box, one end of each lead screw is rotationally installed in the inner side wall of the bottom box, and the other end of each lead screw is rotationally installed in the inner side wall of the bottom box; the other end of the screw rod penetrates through a mounting ring in a running fit manner, and a driven bevel gear is mounted at one end of the screw rod in the mounting ring; a driving bevel gear is coaxially and rotatably mounted in the mounting ring, a gear shaft of the driving bevel gear is rotatably mounted in the center of the bottom of the bottom box, and the gear shaft is connected with a main shaft of an adjusting motor mounted outside the bottom box; the detection probes are detachably installed on the sliding blocks, and the sliding blocks make contact with the inner bottom face of the bottom box in a sliding fit mode, so that when the driving bevel gear rotates, all the sliding blocks drive the detection probes to move synchronously. According to the invention, multi-point detection of the hardness of the special equipment can be rapidly and accurately realized.

Description

Technical Field

[0001] The present invention relates to the technical field of hardness testing equipment, and in particular to a multi-point hardness testing device for special equipment. Background Art

[0002] Special equipment, such as pressure vessels, cranes, and elevators, plays a vital role in industrial production and daily life. Their safety is directly related to the safety of life and property. Hardness is a key performance indicator for special equipment. Changes in hardness can reflect changes in the material's internal structure, which in turn can affect the mechanical properties and safety of the equipment.

[0003] Existing hardness testing has many forms, such as Brinell hardness, Rockwell hardness, Vickers hardness, Mohs hardness, Shore hardness testing methods, and the ultrasonic hardness testing method that has been used more and more widely in recent years. These existing hardness testing methods have the best testing effect for different test objects. Modern automatic testing information technology has been integrated to produce a variety of hardness testing tools. Generally, it is an independent portable integrated testing instrument. More often, it is a main part formed by a data processing and display unit and a detection probe connected to the main part through a signal line. Even more perfectly, many kinds of comprehensive testing equipment have been born in which a main part can be plugged into multiple types of hardness testing probes. However, this type of equipment also has a disadvantage, that is, when in use, it is necessary to manually unplug and plug the signal line to replace the connection of different hardness testing probes, and test one point at a time.

[0004] As mentioned above, traditional hardness testing methods mostly rely on single-point testing, acquiring hardness values ​​at only one location at a time. For large, complex equipment like special equipment, single-point testing cannot fully reflect the material's hardness distribution and may miss areas of abnormal hardness, posing a safety hazard. While some existing testing equipment can perform multi-point testing, these methods have drawbacks. For example, some hardness testing devices are complex, difficult to operate, and have low testing efficiency. They also lack the flexibility to adjust the size of the uniformly distributed area of ​​test points, and require manual pre-marking to determine the test points.

[0005] Therefore, there is an urgent need for a device that can efficiently and accurately perform multi-point hardness testing on special equipment to meet the needs of special equipment safety testing and timely discover potential safety problems. Summary of the Invention

[0006] In view of this, an object of the present invention is to provide a multi-point hardness testing device for special equipment to solve a series of technical problems raised in the background technology.

[0007] The present invention is achieved through the following technical solutions:

[0008] A multi-point hardness testing device for special equipment includes a detection probe for detecting hardness and a cylindrical base box. A plurality of screw rods are arranged in a circular array inside the base box. The screw rods are arranged along the radial direction of the base box and are rotatably installed in the base box. One end of the screw rod is rotatably installed in the inner side wall of the base box, and the other end thereof rotates and fits through a mounting ring. A driven bevel gear is installed at one end of the screw rod inside the mounting ring, and the mounting ring is coaxially fixed to the center of the base box; an active bevel gear is also coaxially rotatably installed in the mounting ring, and the gear shaft of the active bevel gear is rotatably installed in the center of the bottom of the base box, and the gear shaft is connected to the main shaft of an adjustment motor installed outside the base box; the detection probe is detachably installed on a slider, and the slider slidably contacts the inner bottom surface of the base box, so that when the active bevel gear rotates, all sliders move synchronously with their respective detection probes.

[0009] The cam is secured to the top of the support frame and is adapted to engage the engagement of the cam with the engagement of the guide rail, the cam being secured to the top of the support frame and adapted to engage the engagement of the guide rail with the engagement of the guide rail.

[0010] Furthermore, the support leg includes a horizontal arm perpendicular to the axis of the cylindrical slide and an inclined arm arranged obliquely. The horizontal arm freely passes through the strip hole, and the bottom end of the inclined arm slides in contact with the inner bottom surface of the bottom box through the support plate.

[0011] Furthermore, a circular box cover is threadably mounted inside the box opening of the bottom box, and the box cover completely covers the box opening.

[0012] Furthermore, the box cover is provided with a plurality of rows of circular through holes, each row of through holes is arranged along the radial direction of the bottom box, each through hole is for the detection probe to slide through, and all rows of through holes are arranged in a circular array around the center of the bottom box.

[0013] Furthermore, the box cover is provided with a plurality of strip-shaped through holes, each of which is arranged along the radial direction of the bottom box, each of which is for the detection probe to slide through, and all the strip-shaped through holes are arranged in a circular array around the center of the bottom box.

[0014] Furthermore, a plurality of magnets are arranged in a circular array near the edge of the box cover, and the magnets are fixed on the top of a sliding body, and the sliding body is elastically and telescopically installed on the end face of the box cover by a pressure spring. In the assembled state, the length of the magnet exposed from the end face of the box cover is longer than the length of the detection probe exposed from the end face of the box cover, and when the bottom box is subjected to an axial external driving force and squeezes the detection surface of the device to be tested with the detection probe, the pressure elasticity is still within the elastic limit.

[0015] Furthermore, the adjustment motor is fixed at the center of the bottom surface of the outer box of the base box. A plurality of hydraulic cylinders for providing the external driving force are disposed around the adjustment motor. The hydraulic cylinders are secured within a cylindrical mounting compartment, and the piston rods of the hydraulic cylinders freely extend out of the mounting compartment and are fixedly connected to the base box. A plurality of heat dissipation holes are disposed on the surrounding sidewalls of the mounting compartment. The present invention also coaxially secures a mounting handle with a connecting flange to the mounting compartment.

[0016] Furthermore, a circular cover is sealingly fixed to one end of the mounting ring away from the bottom of the bottom box, so as to enclose all the bevel gears in the mounting ring.

[0017] The beneficial effects of the present invention are:

[0018] This multi-point hardness testing device for special equipment uses multiple detection probes working simultaneously. Combined with a mobile positioning module, it can quickly perform multi-point hardness testing on large areas of special equipment, greatly improving detection efficiency, shortening detection time, and meeting the needs of rapid detection of special equipment.

[0019] The hardness detection probes in the present invention are elastically mounted and can be adjusted adaptively, thereby ensuring that all detection probes can fully contact the detection surface and reducing measurement errors.

[0020] The multi-point hardness detection area of ​​the present invention can be automatically expanded and reduced to meet the detection requirements of special equipment of different sizes, thereby expanding the application range of the device and improving its versatility.

[0021] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cutaway schematic diagram of a cross section of the bottom box of the present invention;

[0023] Figure 2 It is a cross-sectional view of the slider with the detection probe installed in the axial direction of the screw rod;

[0024] Figure 3 This is a schematic diagram of the appearance of a slider with a detection probe installed;

[0025] Figure 4 for Figure 3 A schematic diagram of the structure with the support legs removed;

[0026] Figure 5 A schematic cross-sectional view of the back of the bottom box of the present invention;

[0027] Figure 6 It is a schematic top view of the first structure of the present invention provided with a box cover;

[0028] Figure 7 for Figure 6 a front view of the structure shown;

[0029] Figure 8 It is a schematic diagram of the second structure of the present invention provided with a box cover;

[0030] Figure 9 for Figure 6 A schematic diagram of the structure shown with additional magnets;

[0031] Figure 10 for Figure 7 Schematic diagram of the structure shown when adding magnets.

[0032] In the figure: base box 1, screw rod 2, slider 3, support seat 301, blind hole 302, pressure-resistant spring 303, support leg 304, inclined arm 30401, support plate 30402, cross arm 30403, cylindrical slide 305, pre-tightening screw cover 306, strip hole 30601, detection probe 4, mounting ring 5, driven bevel gear 6, driving bevel gear 7, adjustment motor 8, box cover 9, through hole 901, strip through hole 902, hydraulic cylinder 10, piston rod 11, magnet 12, mounting chamber 13, mounting handle 14, circular cover 15, sliding body 16, pressure-bearing spring 17. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0036] See also Figure 1-Figure 5 The present invention provides a technical solution: a multi-point hardness testing device for special equipment, mainly including detection probes 4 for detecting hardness. These detection probes 4 can be complete hardness testing tools or detection components of the same or different hardness testing methods as needed. When used as detection probes 4 of different hardness testing methods, each detection probe 4 includes at least three, and they are preferably arranged in a circular array. The detection device in this embodiment also includes a cylindrical bottom box 1. The cavity inside the bottom box 1 is also a cylindrical cavity. There are a number of screw rods 2 in a circular array inside the bottom box 1. The screw rods 2 are located above the inner bottom surface of the bottom box 1. Each screw rod 2 is arranged along the corresponding radial direction of the bottom box 1, and these screw rods 2 can be rotatably installed in the bottom box 1. Specifically, one end of the screw rod 2 can be rotatably installed in the inner wall of the bottom box 1, and the other end thereof can be rotatably fitted through a mounting ring 5, that is, the fitting portion between the screw rod 2 and the mounting ring 5 is not provided with threads. In addition, a driven bevel gear 6 needs to be installed at one end of each screw rod 2 extending into the mounting ring 5. The mounting ring 5 is coaxially fixed to the center of the bottom box 1 to surround all the driven bevel gears 6. In order to better protect the gear transmission, Figure 1 As shown, a circular cover 15 is hermetically fixed to the end of the mounting ring 5 facing away from the bottom of the bottom box 1 to enclose all the bevel gears within the mounting ring 5. In addition, in this embodiment, a driving bevel gear 7 is coaxially mounted and rotatably installed within the mounting ring 5. This driving bevel gear 7 is used to synchronously drive all the driven bevel gears 6 to rotate. Specifically, the gear shaft of the driving bevel gear 7 is rotatably mounted in the center of the bottom of the bottom box 1, and the gear shaft is connected to the main shaft of an adjustment motor 8 installed outside the bottom box 1. When the adjustment motor 8 is started, it rotates the driving bevel gear 7, and then rotates all the driven bevel gears 6. During installation, all detection probes 4 are preferably detachably mounted on the slider 3 so that they can be quickly removed and replaced with detection probes 4 of the same or different shaft types when necessary. The slider 3 is in sliding contact with the inner bottom surface of the bottom box 1 so that when the driving bevel gear 7 rotates, all sliders 3 can slide against the inner bottom surface of the bottom box 1, and then move their respective detection probes 4 synchronously, forming a multi-point detection area with different array radii.

[0037] In this embodiment, Figure 1-5 As shown in the figure, the slider 3 used includes a support seat 301, a pressure-resistant spring 303, a cylindrical slide 305 and a pre-tightening screw cover 306, wherein the support seat 301 is threadedly mounted on the screw rod 2, and the top surface of the support seat 301 has a blind hole 302, and a pressure-resistant spring 303 is vertically installed in this blind hole 302, one end of the pressure-resistant spring 303 is connected to the bottom of the blind hole 302, and the other end of the pressure-resistant spring 303 is connected to the bottom end of the cylindrical slide 305, and the bottom end of the slide is located in the blind hole 302. During the specific production, the cylindrical slide 305 is a stepped truncated cone structure, and its smaller truncated cone is slidably inserted into the blind hole 302, and as shown Figure 1 and Figure 2 、 Figure 3 As shown, a support leg 304 is fixed on each of the two opposite side walls of the smaller truncated table, so that when squeezing the surface of the characteristic device to be tested, the force will not be mainly borne by the above-mentioned pressure-resistant spring 303, but will be borne by the support leg 304, and the force will be transmitted to the bottom box 1. In more detail, the pre-tightening screw cover 306 is threadedly fitted on the top of the support seat 301, and the detection probe 4 installed on the top of the cylindrical slide 305 can freely pass through the through-hole in the center of the pre-tightening screw cover 306, that is, the detection probe 4 can freely move axially relative to the pre-tightening screw cover 306. In order to ensure that the detection probe 4 always maintains stability under normal conditions, the tightening degree of the above-mentioned pre-tightening screw cover 306 must be such that the pressure-resistant spring 303 is in a compressed state. In order to achieve the above-mentioned technical effects, in this embodiment, Figure 4 As shown, two vertical strip holes 30601 are required to be provided on the side wall of the pre-tightening screw cover 306. The support leg 304 passes through the strip holes 30601 and can move vertically along the strip holes 30601, that is, the detection probe 4 can move vertically relative to the locking screw. In order to facilitate smoother movement, the bottom end of the support leg 304 is in sliding contact with the inner bottom surface of the bottom box 1.

[0038] In the above embodiments, Figure 1-Figure 5 As shown, the support leg 304 includes a horizontal arm 30403 perpendicular to the axis of the cylindrical slide 305, and an inclined arm 30401 arranged at an angle. The horizontal arm 30403 freely passes through the strip hole 30601, and the bottom end of the inclined arm 30401 is in sliding contact with the inner bottom surface of the bottom box 1 through the support plate 30402. The support plate 30402 is in sliding contact with the bottom box 1 to enhance the load-bearing capacity and the freedom of sliding.

[0039] In order to protect a series of transmission components in the bottom box 1, in this embodiment, Figures 6-10 As shown, a circular box cover 9 is screwed in the box opening of the bottom box 1, and the box cover 9 completely covers the box opening. Since the detection probe 4 is installed through the pressure-resistant spring 303, the box cover 9 in this embodiment can be Figure 6 As shown, there are several rows of circular through holes 901, each row of through holes 901 is arranged along the radial direction of the bottom box 1, and each through hole 901 is for the detection probe 4 to slide through. All rows of through holes 901 are arranged in a circular array around the center of the bottom box 1. When the active bevel gear 7 rotates, all detection probes 4 can pop out of the through hole 901 when sliding to the corresponding through hole 901, so as to contact the surface to be tested of the special equipment. In this case, it is equivalent to presetting the size of the circular area to be tested, which is divided into multiple range levels and detection point density levels of different sizes. The above structural design requires that the top of the detection probe 4 is chamfered so that it can slide in and out of the through hole 901 under compression. It is suitable for detection areas of planes or surfaces of special equipment with small height differences.

[0040] As another example, Figure 8 As shown, the box cover 9 in this embodiment is provided with a plurality of strip-shaped through-holes 902, each of which is arranged radially along the bottom box 1. Each strip-shaped through-hole 902 allows the detection probe 4 to slide linearly through it, and all strip-shaped through-holes 902 are arranged in a circular array around the center of the bottom box 1. This structural design does not have the special requirements for the length and structure of the detection probe 4 as in the previous embodiment, nor does it have the special requirements for the surface to be inspected of the special equipment to be flat or with a small height difference, thus providing greater adaptability. However, the exposed area inside the bottom box 1 is larger.

[0041] In this embodiment, the problem of how to conveniently install the hardness detection device on the surface of special equipment when detecting hardness is fully considered. Specifically, in this embodiment, if Figures 8-10 As shown, a plurality of magnets 12 are arranged in a circular array near the edge of the box cover 9. These magnets 12 can firmly attract and fix the surface to be tested of the special equipment, because generally speaking, the special equipment is made of metal magnetic materials. Figure 10 , the magnet 12 is fixed on the top of a sliding body 16, and the sliding body 16 is elastically and telescopically installed on the end face of the box cover 9 through a pressure spring 17. In the assembled state, the length of these magnets 12 exposed from the end face of the box cover 9 is longer than the length of the detection probe 4 exposed from the end face of the box cover 9. The purpose is to ensure that when the hardness detection device is installed, the magnet 12 can first contact the surface to be tested, and avoid the detection probe 4 from touching the surface to be tested too early. When in use, first place the magnet 12 in the area to be tested, let the hardness detection device be pre-fixed in the area to be tested, and then apply an axial external driving force to the bottom box 1, so that all the detection probes 4 are in contact with the surface of the special equipment, and then realize the synchronous detection of multi-point hardness. In order to ensure the reliability of the use of this hardness detection device, when the above-mentioned external area driving force brings the detection probe 4 to squeeze the detection surface of the equipment to be tested, the pressure elasticity is still within the elastic limit.

[0042] In this embodiment, Figure 7 and Figure 10 As shown, an adjusting motor 8 is fixed at the center of the bottom surface of the outer box of the bottom box 1, and a number of hydraulic cylinders 10 are provided around the adjusting motor 8. These hydraulic cylinders 10 are used to provide the aforementioned external driving force. During specific installation, the hydraulic cylinder 10 is fixed in a cylindrical mounting chamber 13, and the piston rod 11 of the hydraulic cylinder 10 freely extends out of the mounting chamber 13 and is fixedly connected to the bottom box 1. The bottom box 1 is fixed on the piston rod 11 to be driven by the hydraulic cylinder 10 for detection. In addition, a number of heat dissipation holes can be provided on the surrounding side walls of the mounting chamber 13. For areas with materials that do not have viscomagnetic properties, or for situations where there is no material that can be directly mounted on viscomagnetic materials for detection, the targeted design structure of the present invention is that a mounting handle 14 with a connecting flange is coaxially fixed on the mounting chamber 13, so that the hardness detection device can be manually held and pre-installed in the area to be tested of the special equipment.

[0043] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0044] Furthermore, the term "identical" does not necessarily mean that the components must be identical; slight variations are permitted. The term "perpendicular" simply means that the components are positioned more perpendicularly than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-point hardness testing device for special equipment, comprising a detection probe (4) for detecting hardness, characterized in that: The invention also comprises a cylindrical bottom box (1), wherein a plurality of screw rods (2) are arranged in a circular array in the bottom box (1), the screw rods (2) are arranged along the radial direction of the bottom box (1) and are rotatably mounted in the bottom box (1), one end of the screw rod (2) is rotatably mounted in the inner side wall of the bottom box (1), and the other end thereof is rotatably fitted through a mounting ring (5), and a driven bevel gear (6) is mounted on one end of the screw rod (2) in the mounting ring (5), and the mounting ring (5) is coaxially fixed in the center of the bottom box (1); a driving bevel gear (7) is also coaxially rotatably mounted in the mounting ring (5), the gear shaft of the driving bevel gear (7) is rotatably mounted in the center of the bottom of the bottom box (1), and the gear shaft is connected to the main shaft of an adjusting motor (8) mounted outside the bottom box (1); The detection probe (4) is detachably mounted on the slider (3), and the slider (3) contacts the inner bottom surface of the bottom box (1) in a sliding manner, so that when the active bevel gear (7) rotates, all the sliders (3) move synchronously with their respective detection probes (4).

2. The multi-point hardness testing device for special equipment according to claim 1, characterized in that: The slider (3) includes a support seat (301), a pressure-resistant spring (303), a cylindrical slide (305) and a pre-tightening screw cover (306). The support seat (301) is threadedly mounted on the screw rod (2). The top surface of the support seat (301) has a blind hole (302). One end of the pressure-resistant spring (303) is installed in the blind hole (302). The other end of the pressure-resistant spring (303) is connected to the bottom end of the cylindrical slide (305). The cylindrical slide (305) is a stepped truncated cone structure. Its smaller truncated cone is slidably inserted into the blind hole (302), and a support is fixed on each of its two opposite side walls. The support leg (304) and the pre-tightening screw cover (306) are threadedly fitted on the top of the support seat (301), and the detection probe (4) installed on the top of the cylindrical slide (305) can freely pass through the central through-hole of the pre-tightening screw cover (306), and the pre-tightening screw cover (306) makes the pressure-resistant spring (303) in a compressed state; two vertical strip holes (30601) are provided on the side wall of the pre-tightening screw cover (306), and the support leg (304) passes through the strip holes (30601) and can move vertically along the strip holes (30601), and the bottom end of the support leg (304) is in sliding contact with the inner bottom surface of the bottom box (1).

3. The multi-point hardness testing device for special equipment according to claim 2, characterized in that: The support leg (304) comprises a horizontal arm (30403) perpendicular to the axis of the cylindrical slide (305), and an inclined arm (30401) arranged at an angle. The horizontal arm (30403) freely passes through the strip hole (30601), and the bottom end of the inclined arm (30401) is in sliding contact with the inner bottom surface of the bottom box (1) through the support plate (30402).

4. The multi-point hardness testing device for special equipment according to claim 1, characterized in that: A circular box cover (9) is thread-fittedly mounted inside the box opening of the bottom box (1), and the box cover (9) completely covers the box opening.

5. The multi-point hardness testing device for special equipment according to claim 4, characterized in that: The box cover (9) is provided with a plurality of rows of circular through holes (901), each row of through holes (901) is arranged along the radial direction of the bottom box (1), each through hole (901) is for the detection probe (4) to slide through, and all rows of through holes (901) are arranged in a circular array around the center of the bottom box (1).

6. The multi-point hardness testing device for special equipment according to claim 4, characterized in that: The box cover (9) is provided with a plurality of strip-shaped through holes (902), each strip-shaped through hole (902) is arranged along the radial direction of the bottom box (1), each strip-shaped through hole (902) is for the detection probe (4) to slide through, and all the strip-shaped through holes (902) are arranged in a circular array around the center of the bottom box (1).

7. The multi-point hardness testing device for special equipment according to claim 4, characterized in that: A plurality of magnets (12) are arranged in a circular array near the edge of the box cover (9). The magnets (12) are fixed to the top of a sliding body (16). The sliding body (16) is elastically and telescopically mounted on the end face of the box cover (9) via a pressure spring (17). In the assembled state, the length of the magnets (12) exposed from the end face of the box cover (9) is longer than the length of the detection probe (4) exposed from the end face of the box cover (9). When the bottom box (1) is subjected to an axial external driving force and presses the detection surface of the device to be tested with the detection probe (4), the pressure elasticity is still within the elastic limit.

8. The multi-point hardness testing device for special equipment according to claim 7, characterized in that: The adjusting motor (8) is fixed at the center of the bottom surface of the outer box of the bottom box (1), and a plurality of hydraulic cylinders (10) for providing the external driving force are arranged around the adjusting motor (8). The hydraulic cylinders (10) are fixed in a cylindrical mounting chamber (13), and the piston rods (11) of the hydraulic cylinders (10) are freely extended out of the mounting chamber (13) and are fixedly connected to the bottom box (1). A plurality of heat dissipation holes are arranged on the surrounding side walls of the mounting chamber (13).

9. The multi-point hardness testing device for special equipment according to claim 8, characterized in that: A mounting handle (14) with a connecting flange is coaxially fixed on the mounting chamber (13).

10. The multi-point hardness testing device for special equipment according to claim 1, characterized in that: A circular cover (15) is sealingly fixed to one end of the mounting ring (5) facing away from the bottom of the bottom box (1) so as to enclose all the bevel gears in the mounting ring (5).

Images