阅读说明：本技术 一种带热显示和热敏感压放气功能的装置 (Device with heat display and heat sensitive pressure relief functions ) 是由 张海 邱东东 丁雪峰 焦竞赛 肖卿 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种带热显示和热敏感压放气功能的装置,包括螺塞、第一合金、螺母和第二合金,所述螺塞内腔浇铸第一合金,所述螺母外周浇铸第二合金,所述螺母和螺塞通过螺纹进行连接,且螺母上设置有止动片,所述螺塞内腔设有配合浇筑第一合金的纵向贯通的放气孔,所述螺塞由螺塞杆段、螺塞颈段、螺塞头段和螺塞外伸杆段组成。本发明中,该带热显示和热敏感压放气功能的装置与现有热熔塞安装位置和接口相同,不需要更改现有机轮结构,本发明中螺塞与螺母拧紧后,通过螺母上的止动片折弯到螺塞头段外六头平面形成防松结构。(The invention discloses a device with functions of heat display and heat sensitive pressure relief, which comprises a screw plug, a first alloy, a nut and a second alloy, wherein the first alloy is cast in the inner cavity of the screw plug, the second alloy is cast on the periphery of the nut, the nut and the screw plug are connected through threads, a stop piece is arranged on the nut, a longitudinally through relief hole matched with the first alloy is cast in the inner cavity of the screw plug, and the screw plug consists of a screw plug rod section, a screw plug neck section, a screw plug head section and a screw plug extension rod section. According to the invention, the installation position and the interface of the device with the heat display and heat sensitive pressure relief functions are the same as those of the existing hot melt plug, the structure of the existing airplane wheel does not need to be changed, and after the screw plug and the nut are screwed up, the stop piece on the nut is bent to the six-head plane outside the head section of the screw plug to form an anti-loosening structure.)

1. The device with the functions of heat display and heat sensitive pressure relief is characterized by comprising a screw plug (1), a first alloy (2), a nut (3) and a second alloy (4);

a first alloy (2) is cast in the inner cavity of the screw plug (1), a second alloy (4) is cast on the periphery of the nut (3), the nut (3) and the screw plug (1) are connected through threads, and a stop piece (35) is arranged on the nut (3);

the screw plug (1) consists of a screw plug rod section (12), a screw plug neck section (13), a screw plug head section (14) and a screw plug extending rod section (15), wherein the screw plug rod section (12) is positioned at one end of the screw plug (1), the outer surface of the screw plug rod section (12) is provided with a threaded surface, the screw plug neck section (13) is positioned at the middle end of the screw plug (1), the outer side of the screw plug neck section (13) is sleeved with an O-shaped sealing ring (5), the screw plug head section (14) is positioned in the middle of the screw plug (1), and the screw plug extending rod section (15) is positioned at the other end of the screw plug (1);

nut (3) periphery is provided with step and revolves into face (31), nut (3) are including internal thread face (32), hole fitting surface (33), locking terminal surface (34) and stop piece (35), internal thread face (32) are located nut (3) hole one end, hole fitting surface (33) are located the nut (3) hole other end, stop terminal surface (34) are located the terminal surface of nut (3), stop piece (35) are located the nut (3) terminal surface periphery outside.

2. Device with thermal display and pressure relief function according to claim 1, characterized in that said stop tab (35) is a rectangular tab or a rectangular tab with safety vent.

3. A device with thermal display and pressure relief functionality according to claim 1, wherein the first alloy (2) is a eutectic alloy material with a temperature characteristic having a sharp phase change from solid phase to liquid phase.

4. A device with heat display and pressure relief function according to claim 1, characterized in that the second alloy (4) is a eutectic alloy material with a temperature characteristic having a sharp phase change from solid phase to liquid phase and a melting point lower than that of the first alloy (2).

5. The device with the functions of heat display and heat sensitive pressure relief according to claim 1, characterized in that the cavity of the screw plug (1) is provided with a longitudinally through relief hole (11) for pouring the first alloy (2).

6. Device with heat display and pressure relief function according to claim 1, characterized in that said plug head (14) is hexagonal.

7. The device with the functions of heat display and heat sensitive pressure relief according to claim 1, wherein the outer surface wall of the screw plug extending rod section (15) is provided with an external thread surface.

8. The device with the functions of heat display and heat sensitive pressure relief according to claim 1, wherein the outer surface wall of the stop piece (35) is provided with a circular hole.

Technical Field

The invention relates to the technical field of hot plugs, in particular to a device with heat display and heat sensitive pressure relief functions.

Background

The hot melt plug is a heat-sensitive pressure-sensing air-release device for tubeless brake wheel. Modern aircraft tires are made of rubber, which bursts when the core temperature of the tire bead exceeds a certain temperature. This temperature results from the normal bending deformation heating of the tires and the heat release of the brakes in the wheel cavity during take-off and landing of the aircraft, the high temperature operation of the brakes results in overheating of the tires, the wheel strength weakens, the tires burst under inflation pressure, and the wheel is damaged. Tire bursting is particularly prone to occur when takeoff is suspended. Therefore, in the extreme use condition, when the temperature of the tire foot reaches the tire critical bursting temperature, the hot melting plug is adopted. The hot melt plug is installed at the web of the hub. The air release of the hot melting plug is realized by melting the low-melting alloy in the hot melting plug to ensure that the inner cavity of the tire is communicated with the atmosphere, so that the internal pressure of the tire is released, and the tire is prevented from being exploded.

The heat display device is a heat-sensitive warning device for the wheels of the aircraft. Before the wheel is overheated and the hot plug is not deflated, the material of the wheel is subjected to high temperature, the strength is weakened, the load which can be actually borne by the wheel is reduced to the limit use load possibly, and the actual strength of the wheel is unknown by maintenance personnel due to the fact that any abnormality does not occur temporarily, and flight safety concerns are derived. In more severe cases, therefore, a thermal display device may be employed when the wheel temperature reaches a critical temperature for the wheel material strength to drop. The thermal display device is characterized in that the appearance of the thermal display device is obviously changed by melting the low-melting alloy at the head of the thermal display device, so that maintenance personnel are reminded that the airplane wheel is about to be overheated, the airplane wheel needs to be manually and forcibly cooled, and the strength weakening of the airplane wheel and the deflation of a hot plug caused by overheating are prevented. The thermal display device is mounted at the fixed rim of the hub.

The hot plug of certain quantity has usually been arranged on current wheel, but does not arrange hot display device, for making current wheel possess hot display device's function, need some screw holes of newly-increased in relevant position on the wheel hub, be used for arranging hot display device of certain quantity, nevertheless because the wheel atress is more complicated, the screw hole of newly-increased will arouse local stress concentration to weaken the intensity of current wheel, arouse the worry in the safety, and the wheel will not directly borrow current wheel part behind the newly-increased screw hole, has caused the increase of cost.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a device with a heat display function and a heat sensitive pressure relief function.

In order to achieve the purpose, the invention adopts the following technical scheme: a device with heat display and heat sensitive pressure relief functions comprises a screw plug, a first alloy, a nut and a second alloy;

the nut and the plug are connected through threads, and a stop piece is arranged on the nut;

the screw plug consists of a screw plug rod section, a screw plug neck section, a screw plug head section and a screw plug extending rod section, wherein the screw plug rod section is positioned at one end of the screw plug, the outer surface of the screw plug rod section is provided with a thread surface, the screw plug neck section is positioned at the middle end of the screw plug, the outer side of the screw plug neck section is sleeved with an O-shaped sealing ring, the screw plug head section is positioned in the middle of the screw plug, and the screw plug extending rod section is positioned at the other end of the screw plug;

the nut periphery is provided with the step and revolves into the face, the nut includes internal thread face, hole fitting surface, locking terminal surface and locking plate, the internal thread face is located nut hole one end, the hole fitting surface is located the nut hole other end, the locking terminal surface is located the terminal surface of nut, the locking plate is located the nut terminal surface periphery outside.

Preferably, the stop piece is a rectangular piece or a rectangular piece with a safety hole.

Preferably, the first alloy is a eutectic alloy material.

Preferably, the second alloy is a eutectic alloy material, which is a low-melting alloy.

Preferably, the inner cavity of the screw plug is provided with a longitudinally through air vent hole for pouring the first alloy in a matched manner.

Preferably, the plug screw head section is hexagonal.

Preferably, the outer surface wall of the screw plug outer extending rod section is provided with an outer thread surface

Preferably, a circular hole is formed in the outer surface wall of the stop piece.

Compared with the prior art, the invention has the beneficial effects that:

in the present invention,

1. the device with the functions of heat display and heat sensitive pressure relief is the same as the existing hot melt plug in installation position and interface, the existing wheel structure is not required to be changed, and after the screw plug and the nut are screwed up, the stop piece on the nut is bent to the six-head plane outside the head section of the screw plug to form an anti-loosening structure.

2. After the airplane wheel is installed on the airplane wheel, when the temperature of the airplane wheel is higher than the melting point of the second alloy and lower than the melting point of the first alloy, the second alloy is melted, the appearance of the device is obviously changed, and a maintainer is prompted to carry out related operation and inspection according to an airplane wheel use maintenance instruction. After the second alloy is melted, the nut stop piece is only required to be tilted and straightened, the nut is screwed out, and a new nut part is replaced.

3. The invention can prevent the tire burst of the airplane wheel due to overheating in and after the airplane wheel is braked and prompt whether the airplane wheel is about to overheat when the airplane wheel is parked on the ground after the airplane wheel is braked.

4. The technical approach of the invention is to add an external screw section to the existing hot melt plug, integrate a thermal display device on the hot melt plug in a threaded connection mode, and install the hot melt plug interface on the hub of the airplane wheel as a threaded connection point to realize the expected function.

5. The invention also includes: the sealing device is an external sealing device positioned at the neck section of the screw plug, and the sealing element is an O-shaped rubber sealing ring.

Drawings

FIG. 1 is a schematic structural diagram of a device with heat display and heat sensitive pressure relief functions according to the present invention;

FIG. 2 is a schematic structural diagram of a cross section of a device with a heat display and a heat sensitive pressure relief function according to the present invention;

FIG. 3 is a schematic end view of a device with heat display and heat sensitive pressure relief functions according to the present invention;

fig. 4 is a cross-sectional view of a device with thermal display and thermal sensitive pressure relief functions in accordance with the present invention.

Illustration of the drawings:

1. a plug screw; 11. air bleeding holes; 12. a plug screw segment; 13. a plug screw neck section; 14. a plug head section; 15. a plug screw extension rod section; 2. a first alloy; 3. a nut; 31. the steps are screwed into a surface; 32. an internal thread surface; 33. a hole mating surface; 34. a stop end face; 35. a stopper piece; 4. a second alloy; 5. an O-shaped sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, a device with heat display and heat sensitive pressure relief functions comprises a plug screw 1, a first alloy 2, a nut 3 and a second alloy 4;

casting a first alloy 2 in an inner cavity of the screw plug 1, casting a second alloy 4 on the periphery of the nut 3, connecting the nut 3 and the screw plug 1 through threads, and arranging a stop piece 35 on the nut 3;

the screw plug 1 consists of a screw plug rod section 12, a screw plug neck section 13, a screw plug head section 14 and a screw plug extending rod section 15, wherein the screw plug rod section 12 is positioned at one end of the screw plug 1, the outer surface of the screw plug rod section 12 is provided with a thread surface, the screw plug neck section 13 is positioned at the middle end of the screw plug 1 and is used for assembling an O-shaped sealing ring 5, the outer side of the screw plug neck section 13 is sleeved with the O-shaped sealing ring 5, the screw plug head section 14 is positioned in the middle of the screw plug 1 and is in an outer hexagon shape, the screw plug extending rod section 15 is positioned at the other end of the screw plug 1, and the outer surface is a thread surface;

the periphery of the nut 3 is provided with a step screwing surface 31, the nut 3 comprises an internal thread surface 32, a hole matching surface 33, a stop end surface 34 and a stop piece 35, the internal thread surface 32 is positioned at one end of an inner hole of the nut 3 and is used for being connected with the screw plug extending rod section 15, the hole matching surface 33 is positioned at the other end of the inner hole of the nut 3 and is used for being matched with the screw tail end of the screw plug extending rod section 15, the stop end surface 34 is positioned at the end surface of the nut 3, and the stop piece 35 is positioned outside the periphery of the.

The stop piece 35 is a rectangular piece or a rectangular piece with a safety hole.

The first alloy 2 is a eutectic alloy material with a temperature characteristic that a rapid state change occurs when a solid phase is converted into a liquid phase, the second alloy 4 is a eutectic alloy material with a temperature characteristic that a rapid state change occurs when a solid phase is converted into a liquid phase, the melting point of the eutectic alloy material is lower than that of the first alloy 2, a longitudinally through vent hole 11 matched with the first alloy 2 is formed in the inner cavity of the plug screw 1, the head section 14 of the plug screw is hexagonal, an outer thread surface is formed in the outer surface wall of the plug screw extending rod section 15, and a circular hole is formed in the outer surface wall of the stop piece 35.

The working principle is as follows: after the device with the heat display and heat sensitive pressure relief function is installed on the airplane wheel, when the temperature of the airplane wheel is higher than the melting point of the second alloy 4 and lower than the melting point of the first alloy 2, the second alloy 4 is melted, the appearance of the device is obviously changed, maintenance personnel is prompted to perform related operation and inspection according to the airplane wheel use and maintenance instruction, after the second alloy 4 is melted, the stopper piece 35 is only required to be tilted straight, the nut 3 is screwed out, and a new nut 3 part is replaced, after the device with the heat display and heat sensitive pressure relief function is installed on the airplane wheel, the airplane wheel can be prevented from being blown out due to overheating in the braking process and after braking, and whether the airplane wheel is about to be overheated when the airplane wheel is parked on the ground after braking is prompted, and the device with the heat display and heat sensitive pressure relief function can not hinder the operation of the aviation brake or damage the strength and the integrity of the airplane wheel, so as to prevent the airplane wheel from being blown out due to overheating, and the function of prompting whether the airplane wheel is about to overheat or not when the airplane wheel is parked on the ground after being braked.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.