Valve spring thermal fatigue detection device

Abstract

The utility model provides a valve spring thermal fatigue detection device, which comprises a base, through the arrangement of a heating assembly, the valve spring placed between a bottom plate and a top plate is heated through a built-in heating rod, and meanwhile, the design of a hanging hook allows the spring to be firmly hung in a heating area, so that the heating effect is improved. The heating uniformity and stability are ensured, the problem that in the prior art, the spring is heated unevenly due to detection in a non-relatively-closed space is solved, through the arranged lifting assembly, the top plate is driven to ascend or descend along the bottom plate through the telescopic action of the hydraulic telescopic rod, and therefore the heating position of the valve spring is accurately controlled, and the detection accuracy is improved. The valve spring thermal fatigue detection device meets the detection requirements of springs with different sizes or heating requirements, effectively improves the efficiency and accuracy of valve spring thermal fatigue detection through the cooperative work of the two assemblies, and solves the problem of lifting and stretching of the spring under the heating condition in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of spring detection, in particular to a valve spring thermal fatigue detection device. Background Art

[0002] The valve spring is located between the cylinder head and the spring seat at the tail end of the valve stem. The function of the valve spring is to ensure that the valve can fit tightly with the valve seat or valve seat ring when it is closed, and to overcome the inertia force generated by the valve mechanism when the valve is opened, so that the transmission parts are always controlled by the cam and do not separate from each other. The service conditions of the valve spring are harsh, with a vibration frequency of up to 2500-3000 times per minute, a working stress of up to 700-800MPa, and a working temperature of up to 120-150℃. Under such conditions, fatigue cracks and fracture damage are not allowed after long-term work, and the permanent deformation cannot be greater than the specified value. The load characteristics are not allowed to decrease too much, that is, the stress relaxation resistance (under constant strain conditions, the stress decreases with time, which is called high stress relaxation characteristics.

[0003] The consequences of valve spring fracture accidents are very serious. At present, the test conditions of domestic fatigue testing machines are all room temperature, and the test frequency is very low. The actual working temperature of the valve spring is about 100℃~150℃, and the compression frequency can reach up to 50Hz~60Hz. Under such test conditions, the test data is inaccurate and the experimental effect is prolonged. After searching, in the prior art, the Chinese patent with patent announcement number CN214121586U discloses "a valve spring thermal fatigue detection device", but there are still the following defects: the test device is not relatively closed during testing, and the spring will be unevenly heated due to the indoor environment during indoor heating testing, resulting in different heating effects of multiple springs, affecting the overall inspection data.

[0004] Therefore, we made improvements to this and proposed a valve spring thermal fatigue detection device. Utility Model Content

[0005] The purpose of the utility model is to address the problem that the existing test devices are not relatively closed during testing. During indoor heating tests, the springs are heated unevenly due to the indoor environment, resulting in different heating effects on multiple springs, which affects the overall test data.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0007] Valve spring thermal fatigue detection device is used to improve the above problems.

[0008] The utility model is specifically as follows:

[0009] It comprises a base, a heating component is arranged inside the base, and a lifting component is arranged inside the base;

[0010] The heating assembly includes a heating rod, a bottom plate, a top plate and a hanging hook. The heating rod is arranged at the inner top of the base, the bottom plate is arranged at the inner top of the base, the top plate is slidably connected to the top of the bottom plate, and a plurality of hanging hooks are arranged at the top of the bottom plate and the bottom of the top plate. The bottom plate is clamped to the outer side of the heating rod, and the hanging hook is located on one side of the heating rod.

[0011] As a preferred technical solution of the utility model, the lifting assembly includes a hydraulic telescopic rod, a mounting portion and a fixed seat, the hydraulic telescopic rod is arranged at the inner top of the base, the mounting portion is arranged at the bottom of the hydraulic telescopic rod, the fixed seat is arranged at the top of the top plate, and the fixed seat is bolted to one side of the mounting portion.

[0012] As a preferred technical solution of the utility model, cabinet doors that enclose the base space are hinged on both sides of the base, a gripping handle is provided on one side of the cabinet door, the cabinet door is located on one side of the fixed seat, and a 1 mm gap is left between one side of the cabinet door and the base.

[0013] As a preferred technical solution of the utility model, two lighting lamps for lighting the interior of the base are arranged on the inner side of the base, and the lighting lamps are located on both sides of the top of the base.

[0014] As a preferred technical solution of the utility model, the bottom of the base is provided with supporting legs for supporting the base, and the bottom of the supporting legs is provided with anti-skid pads for preventing the supporting legs from slipping, and the diameter of the anti-skid pads is larger than the diameter of the supporting legs.

[0015] As a preferred technical solution of the utility model, a vent hole is opened on the top of the base, the vent hole is circular in plan view, the vent hole penetrates into the interior of the base, and the vent hole is located above the top plate.

[0016] As a preferred technical solution of the utility model, carrying handles for carrying the base are provided on both sides of the base, and one end of the carrying handle is bent upward.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the solution of the utility model:

[0019] 1. The heating assembly is set up to heat the valve spring placed between the bottom plate and the top plate through the built-in heating rod. At the same time, the design of the hanging hook allows the spring to be firmly hung in the heating area to ensure the uniformity and stability of heating, solving the problem of uneven heating caused by the spring being tested in a relatively closed space in the prior art;

[0020] 2. Through the setting of the lifting component, the hydraulic telescopic rod is extended and retracted to drive the top plate to rise or fall along the bottom plate, thereby realizing the precise control of the valve spring heating position and meeting the detection requirements of springs of different sizes or heating requirements. The coordinated work of these two components effectively improves the efficiency and accuracy of valve spring thermal fatigue detection and solves the problem of the lifting and stretching of the spring under heating in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a valve spring thermal fatigue detection device provided by the utility model;

[0022] Figure 2 A left-side perspective cross-sectional structural diagram of a valve spring thermal fatigue detection device provided by the utility model;

[0023] Figure 3 A schematic diagram of the structure of a heating component of a valve spring thermal fatigue detection device provided by the utility model;

[0024] Figure 4 A schematic diagram of the front view of the valve spring thermal fatigue detection device provided by the utility model;

[0025] Figure 5 The present invention is a schematic top view of the structure of a valve spring thermal fatigue detection device provided by the present invention.

[0026] Indicated in the figure:

[0027] 1. Base; 2. Heating component; 3. Lifting component; 4. Cabinet door; 5. Holding handle; 6. Light; 7. Support leg; 8. Anti-slip pad; 9. Ventilation hole; 10. Carrying handle; 201. Heating rod; 202. Bottom plate; 203. Top plate; 204. Hanging hook; 301. Hydraulic telescopic rod; 302. Installation part; 303. Fixed seat. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0029] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. 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.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0031] 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, further definition and explanation thereof is not required in subsequent drawings.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment provides a valve spring thermal fatigue detection device, including a base 1, a heating component 2 is arranged inside the base 1, and a lifting component 3 is arranged inside the base 1;

[0033] The heating assembly 2 includes a heating rod 201, a bottom plate 202, a top plate 203 and a hanging hook 204. The heating rod 201 is arranged at the inner top of the base 1, the bottom plate 202 is arranged at the inner top of the base 1, the top plate 203 is slidably connected to the top of the bottom plate 202, and multiple hanging hooks 204 are arranged at the top of the bottom plate 202 and the bottom of the top plate 203. The bottom plate 202 is clamped on the outer side of the heating rod 201, and the hanging hook 204 is located on one side of the heating rod 201. The heating rod 201 is arranged at the inner top of the base 1 for generating heat. A heating space is formed between the bottom plate 202 and the top plate 203, wherein the top plate 203 can be slidably connected to the top of the bottom plate 202 to adapt to valve springs of different lengths. Multiple hanging hooks 204 are arranged at corresponding positions of the bottom plate 202 and the top plate 203 for fixing the valve spring so that it is located within the heating range of the heating rod 201.

[0034] like Figure 3 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, the lifting assembly 3 includes a hydraulic telescopic rod 301, a mounting portion 302 and a fixing seat 303, the hydraulic telescopic rod 301 is arranged at the inner top of the base 1, the mounting portion 302 is arranged at the bottom of the hydraulic telescopic rod 301, the fixing seat 303 is arranged at the top of the top plate 203, and the fixing seat 303 is bolted to one side of the mounting portion 302. The design purpose is mainly to perform accurate tensile testing during the heating process of the valve spring. When the valve spring needs to be stretched, by controlling the telescopic length of the hydraulic telescopic rod 301, the mounting portion 302 moves down or up accordingly, driving the fixing seat 303 bolted thereto and the top plate 203 connected thereto to be lifted and lowered. The lifting and lowering of the top plate 203 will drive the valve spring hung on the hanging hook 204 to be stretched or relaxed to meet different testing requirements. This precise lifting control ensures that the valve spring can be subjected to uniform and controllable tensile force during the heating process, thereby more accurately evaluating its thermal fatigue performance.

[0035] like Figure 4 As shown, as a preferred embodiment, on the basis of the above method, further, cabinet doors 4 that enclose the space of the base 1 are hinged on both sides of the base 1, and a gripping handle 5 is provided on one side of the cabinet door 4. The cabinet door 4 is located on one side of the fixed seat 303, and a 1 mm gap is left between one side of the cabinet door 4 and the base 1 for enclosing the space of the base 1. A gripping handle 5 is provided on one side of the cabinet door 4 to facilitate the operator to open or close the cabinet door 4. A 1 mm gap is left between the cabinet door 4 and the base 1 to help dissipate heat and avoid friction when the cabinet door 4 is fully fitted.

[0036] like Figure 2 As shown, as a preferred embodiment, on the basis of the above method, further, two lighting lamps 6 for internal lighting of the base 1 are provided on the inner side of the base 1, and the lighting lamps 6 are located on both sides of the top of the base 1 to provide lighting when the light is insufficient. The lighting lamps 6 are located on both sides of the top of the base 1 to ensure that the inside of the base 1 can be illuminated to facilitate observation and operation by the operator.

[0037] like Figure 4 As shown, as a preferred embodiment, on the basis of the above method, further, the bottom of the base 1 is provided with a supporting leg 7 for supporting the base 1, and the bottom of the supporting leg 7 is provided with an anti-skid pad 8 for preventing the supporting leg 7 from slipping, and the diameter of the anti-skid pad 8 is larger than the diameter of the supporting leg 7. The bottom of the base 1 is provided with a supporting leg 7 for supporting the entire device, and the bottom of the supporting leg 7 is provided with an anti-skid pad 8 to increase the friction with the ground and prevent the device from sliding or shifting during use. The diameter of the anti-skid pad 8 is larger than the diameter of the supporting leg 7 to further improve the anti-skid effect).

[0038] like Figure 5 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, a vent hole 9 is opened on the top of the base 1, and the vent hole 9 is circular in shape when viewed from above, and the vent hole 9 penetrates into the interior of the base 1. The vent hole 9 is located above the top plate 203, and its top view shape is circular, and the vent hole 9 penetrates into the interior of the base 1, which helps to discharge the hot air and harmful gases generated during the heating process, ensure good ventilation inside the device, and reduce the temperature.

[0039] like Figure 1 As shown, as a preferred embodiment, on the basis of the above method, further, both sides of the base 1 are provided with carrying handles 10 for carrying the base 1, and one end of the carrying handle 10 is bent upward to facilitate the operator to carry the entire device. One end of the carrying handle 10 is bent upward, which conforms to the ergonomic design, making the carrying process more comfortable and labor-saving.

[0040] Specifically, when the valve spring thermal fatigue detection device is working: the base 1 is used as the basis of the entire device and is stably placed on the ground through the support legs 7. The anti-skid pads 8 at the bottom of the support legs 7 ensure that the device does not slide during operation. A heating component 2 is arranged inside the base 1, which is composed of a heating rod 201, a bottom plate 202, a top plate 203 and a hanging hook 204. The heating rod 201 is located at the top of the base 1 and is used to generate heat to heat the valve spring. An adjustable heating space is formed between the bottom plate 202 and the top plate 203. The top plate 203 is connected to the bottom plate 202 by sliding, and the height can be adjusted as needed to adapt to valve springs of different lengths. A plurality of hooks 204 are respectively arranged at corresponding positions of the bottom plate 202 and the top plate 203 for fixing the valve springs. The lifting assembly 3 is composed of a hydraulic telescopic rod 301, a mounting portion 302 and a fixing seat 303. The mounting portion 302 is fixed to the bottom of the hydraulic telescopic rod 301, and the fixing seat 303 is bolted to the top of the top plate 203. By controlling the extension and retraction of the hydraulic telescopic rod 301, the top plate 203 can be driven. Lifting and lowering, thereby realizing the stretching test of the valve spring. During the heating process, the hydraulic telescopic rod 301 can adjust the telescopic length according to the preset instructions, so that the valve spring is subjected to a uniform and controllable tensile force, so as to more accurately evaluate its thermal fatigue performance. In order to facilitate operation and observation, openable and closable cabinet doors 4 are set on both sides of the base 1. The cabinet doors 4 are connected to the base 1 by hinges, and a gap is left to ensure ventilation. One side of the cabinet door 4 is also equipped with a gripping handle 5 for users to open and close. In addition, two lighting lamps 6 are set on the inner side of the base 1 to provide sufficient light so that the operator can clearly see the internal situation under any light conditions. A vent 9 is also opened on the top of the base 1. The shape of the vent 9 is circular and runs through the inside of the base 1. The setting of the vent 9 helps to discharge the hot air and harmful gases generated during the heating process and keep the ventilation inside the device good. Finally, in order to facilitate transportation and movement, carrying handles 10 are also set on both sides of the base 1. One end of the carrying handle 10 is bent upward, which conforms to the ergonomic design, making the transportation process more comfortable and labor-saving.

[0041] All technical features in this embodiment can be freely combined according to actual needs.

[0042] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A valve spring thermal fatigue detection device, comprising a base (1), characterized in that: A heating component (2) is arranged inside the base (1), and a lifting component (3) is arranged inside the base (1); The heating component (2) comprises a heating rod (201), a bottom plate (202), a top plate (203) and a hanging hook (204); the heating rod (201) is arranged at the inner top of the base (1); the bottom plate (202) is arranged at the inner top of the base (1); the top plate (203) is slidably connected to the top of the bottom plate (202); a plurality of hanging hooks (204) are arranged at the top of the bottom plate (202) and the bottom of the top plate (203); the bottom plate (202) is clamped to the outer side of the heating rod (201); and the hanging hook (204) is located on one side of the heating rod (201).

2. A valve spring thermal fatigue detection device according to claim 1, characterized in that: The lifting assembly (3) comprises a hydraulic telescopic rod (301), a mounting portion (302) and a fixing seat (303); the hydraulic telescopic rod (301) is arranged at the inner top of the base (1); the mounting portion (302) is arranged at the bottom of the hydraulic telescopic rod (301); the fixing seat (303) is arranged at the top of the top plate (203); and the fixing seat (303) is bolted to one side of the mounting portion (302).

3. The valve spring thermal fatigue detection device according to claim 1, characterized in that: Cabinet doors (4) for enclosing the space of the base (1) are hingedly connected on both sides of the base (1); a gripping handle (5) is provided on one side of the cabinet door (4); the cabinet door (4) is located on one side of the fixing seat (303); and a gap of 1 mm is left between one side of the cabinet door (4) and the base (1).

4. A valve spring thermal fatigue detection device according to claim 1, characterized in that: Two lighting lamps (6) for illuminating the interior of the base (1) are arranged on the inner side of the base (1); the lighting lamps (6) are located on both sides of the top of the base (1).

5. The valve spring thermal fatigue detection device according to claim 1, characterized in that: The bottom of the base (1) is provided with a support leg (7) for supporting the base (1), and the bottom of the support leg (7) is provided with an anti-skid pad (8) for preventing the support leg (7) from skidding, and the diameter of the anti-skid pad (8) is larger than the diameter of the support leg (7).

6. The valve spring thermal fatigue detection device according to claim 1, characterized in that: A vent hole (9) is provided on the top of the base (1); the vent hole (9) is circular in shape when viewed from above; the vent hole (9) penetrates into the interior of the base (1); and the vent hole (9) is located above the top plate (203).

7. The valve spring thermal fatigue detection device according to claim 1, characterized in that: Carrying handles (10) for carrying the base (1) are provided on both sides of the base (1), and one end of the carrying handle (10) is bent upward.

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