CN216253285U

CN216253285U - End surface heating device

Info

Publication number: CN216253285U
Application number: CN202122855518.1U
Authority: CN
Inventors: 张英佳; 黄文林; 孙五川; 伍宏环; 黄佐华
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-04-08
Anticipated expiration: 2031-11-19

Abstract

The utility model discloses an end face heating device which comprises an end cover, a heating block and a heating rod, wherein the heating rod is embedded into the heating block; in the utility model, the heating of the device is realized by connecting the end cover and the heating block; the coaxial design of the end to be heated and the end cover is favorable for ensuring the heating of the device, and the heating area can be effectively increased by adopting a mode of embedding and placing a heating block; the heating block can ensure that the generated heat is transferred to the end cover, and meanwhile, the heating area of the end cover is increased. The device simplifies the disassembly and assembly of the heating system and has strong popularization and application potential. In addition, the heating rod is used for heating without winding the whole equipment like a heating belt, and in addition, the utility model does not need to change the pipe body, has the advantages of simple design and convenient disassembly and assembly, and is easy to popularize and use.

Description

End surface heating device

Technical Field

The utility model relates to the field of end face heating, in particular to an end face heating device which can be expanded to other end face heating devices required according to requirements.

Background

Shock tubes are widely used in the research of combustion chemistry due to the unique advantage of providing an ideal experimental environment.

Accurate high-pressure and high-temperature experimental conditions can be obtained by using the shock tube, but the traditional shock tube can only carry out gas fuel experiments. Fuels used in life and production are generally in a liquid state at normal temperature, and in order to charge these fuels with low saturation vapor pressure into shock tubes for experiments, heating type shock tubes have appeared. The shock tube is generally divided into a driving section, a membrane clamping section and a driven section, and the heating shock tube heats the driven section which needs to be filled with fuel mixed gas on the original basis.

The heating means of the apparatus are various, and among them, the method of heating by winding a heating tape around the pipe body is the most used, and the heating tape is composed of a nichrome tape in the middle and multiple layers of fiberglass insulation. The heating belt has the advantages of fast heating, high thermal efficiency, long service life and low price, and the length of the heating belt can be flexibly selected according to the requirement. In order to ensure the stability and uniformity of the temperature of the equipment, a thick layer of heat insulation material (such as a ceramic fiber board) is generally wrapped outside the heating band, however, in a shock tube experiment, the end cover needs to be frequently disassembled and assembled for cleaning, the end cover is very troublesome to be heated and disassembled by using the heating band, in addition, the heating band is easy to loosen in the disassembling and assembling process and is easy to cause problems, meanwhile, the heating band has strong heating capacity, but the power is not enough for quick response in the frequent disassembling and assembling process, and therefore, an end face heating device which is convenient to disassemble and assemble and has faster heating response is urgently needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model aims to solve the problem of heating the tube body by the heating belt, and meanwhile, the utility model provides the end face heating device which does not need to change the tube body and has the advantages of simple design and convenience in disassembly and assembly.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides an end face heating device, includes end cover, heating block and heating rod, inside the heating rod embedding heating block, be provided with the cavity on the end cover, in the heating block embedding end cover, the end cover with treat the coaxial setting of heating end.

Furthermore, a plurality of heating rods are arranged inside the heating block.

Further, the plurality of heating rods are symmetrically distributed on the heating block in an equidistant array mode.

Furthermore, the end part of the end cover is provided with a convex side edge, and the side edge is provided with a plurality of connecting holes.

Furthermore, the axle center position of end cover is provided with the interface of installation pressure sensor.

Further, the heating block is made of copper.

Furthermore, the number of the heating blocks 2 is at least two, and the heating blocks jointly form a board surface with a symmetrical structure.

Furthermore, the connection between the end cover and the end to be heated is designed at the outer edge of the end cover; the heating end face of the end cover is smaller than the end face of the end part to be heated.

Further, the end cover is wrapped with a ceramic fiber plate.

Compared with the prior art, the utility model has at least the following beneficial effects:

according to the technical scheme provided by the utility model, the heating of the device is realized through the connection of the end cover and the heating block; the coaxial design of the end to be heated and the end cover is favorable for ensuring the heating of the device, and the embedded design is adopted for placing the heating block, so that the heating area can be effectively increased; the heating block can ensure that the generated heat is transferred to the end cover, and meanwhile, the heating area of the end cover is increased. The device simplifies the disassembly and assembly of the heating system and has strong popularization and application potential. In addition, the heating rod is used for heating without winding the whole equipment like a heating belt, and in addition, the utility model does not need to change the pipe body, has the advantages of simple design and convenient disassembly and assembly, and is easy to popularize and use.

Furthermore, the number and the power of the heating rods of the device can be adjusted, and the applicability of the device to different environments can be increased by flexibly selecting and adjusting the power of the heating rods and the number of the heating rods.

Furthermore, the heating rods are symmetrically distributed on the heating block in an equidistant array mode, the stability and uniformity of heating temperature can be strictly guaranteed, and the method has important significance for expanding the shock tube experiment range and improving the shock tube experiment precision. Specifically, in the heating process, the error is less than 10 ℃ when the temperature is heated to 150 ℃, and the error is not more than 5 ℃ when the temperature is heated to 110 ℃. It should be noted that the stability and uniformity of the heating temperature of the device have an important influence on the accuracy of the experimental result, and a very small heating temperature error has an important significance on the research work of the basic combustion characteristics of the liquid fuel. In addition, different end cover heating powers can be adopted in different fields, and the requirements on heating temperature in different environments are met.

Furthermore, a plurality of connecting holes are formed in the side edge, and the arrangement of the connecting holes can increase the stability of the device.

Further, an interface for installing a pressure sensor is arranged at the axis position of the end cover, the interface can be connected with the pressure sensor to acquire the pressure signal change of the inner end face of the tube, specifically, after the middle sensor of the end cover 1 of the shock tube device is arranged, the pressure at the end cover can be directly measured in an experiment, when chemical reaction dynamics research is carried out, the ignition delay period is measured by using the pressure at the end cover, the influence of detonation waves after fuel combustion can be effectively avoided, and the ignition delay period measured by the pressure sensor at the end cover is more accurate compared with the ignition delay period measured by the pressure sensor on the side wall face.

Furthermore, copper is adopted as the heating block, and the copper has the advantage of high heating rate under the same condition because of high heat conductivity coefficient, so that the requirement of rapid heating is met.

Furthermore, the number of the heating blocks is at least two, and the heating blocks jointly form a board surface with a symmetrical structure. The symmetrical structure design can effectively ensure the uniform heating of the device and the heating effect of the device; after the heating block is divided into two semicylinders, the heating block can be independently disassembled and assembled without disassembling the advantage signal wire of the intermediate pressure sensor.

Furthermore, the connection between the end cover and the end to be heated is designed at the outer edge of the end cover; the heating end face of the end cover is smaller than the end face of the end part to be heated; the design ensures that the end face sinks into the pipe body when the heating end cover is connected with the pipe body; the design of this step effectively increases the heated area of the end cap.

Furthermore, the end cover is wrapped by the ceramic fiber board, and the heat dissipation can be effectively reduced and the utilization rate of energy can be increased by the design of the step.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of an end face heating apparatus according to an embodiment of the present invention

FIG. 2 is a graph showing the temperature profile of the apparatus in a specific heating environment according to an embodiment of the present invention

Wherein, 1, end cover, 2, heating block, 3, heating rod

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In one embodiment of the present invention, as shown in fig. 1, the present invention comprises an end cap 1 directly connected to an end to be heated, a heating block 2, and a heating rod 3. The outer ring of the end cover 1 is provided with 12 holes connected with the pipe body to be heated, in a preferred embodiment, the holes can be through holes and used for being connected with shock tubes through bolts and nuts, the middle of the end cover 1 is provided with a pressure sensor interface, the interface can be a threaded port, and the pressure sensor can be connected to acquire pressure signal changes of the end face of the shock tube. Compared with the conventional end cover, the length of the end cover designed by the utility model is increased, and the heating block 2 is placed in the end cover 1 along with an inwards concave design, so that the heating area is effectively increased. The heating block 2 is composed of two or more same plate structures, all the heating blocks 2 jointly form a plate as the heating block 2, and the copper is used as a material because the heat conductivity coefficient of copper is high, so that the heat conduction efficiency of the device can be improved. After the copper block is divided into two semicylinders, the copper block can be independently assembled and disassembled under the condition that the signal wire of the intermediate pressure sensor is not disassembled. The copper block is used for transferring heat generated by the heating rod 3 to the end cover 1 and increasing the heating area of the end cover 1. 4 commercially available 200W heating rods are arranged on each copper block, the power of each heating rod is related to the heat sink and heat dissipation conditions of heating equipment, and a 150mm diameter 304 stainless steel shock tube is suitable for being matched with a ceramic fiber board for heat preservation by using the 200W heating rods. The design of the step is only the specific arrangement when the device is used as the heating end face of the shock tube, and the heating rods 3 with different powers and numbers can be selected in the process of heating different end faces to be heated; the K-type thermocouple is used for measuring a temperature signal, the temperature is fed back to the PID and can only be fed back to the temperature controller, the temperature controller controls the on-off of a power supply of the heating rod according to the difference between the measured temperature and the designed temperature, and the shock tube and the end cover are wrapped by the ceramic fiber board to reduce heat dissipation.

As shown in figure 2, the heating end cover with the design can ensure that the error is less than 10 ℃ when the temperature is heated to 150 ℃, and the error is not more than 5 ℃ when the temperature is heated to 110 ℃. The stability and uniformity of the temperature have important influence on the accuracy of experimental results, and the extremely small heating temperature error has important significance on the research work of basic combustion characteristics of the liquid fuel.

While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art. The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. The utility model provides an end face heating device, its characterized in that includes end cover (1), heating block (2) and heating rod (3), inside heating rod (3) embedding heating block (2), be provided with the cavity on end cover (1), in heating block (2) embedding end cover (1), end cover (1) with treat the coaxial setting of heating end.

2. An end face heating device according to claim 1, characterized in that a plurality of heating rods (3) are arranged inside the heating block (2).

3. An end-face heating device according to claim 2, characterized in that the plurality of heating rods (3) are symmetrically distributed in an equidistant array on the heating block (2).

4. An end face heating device as claimed in claim 1, characterized in that the end of the end cap (1) is provided with a convex skirt, which skirt is provided with a plurality of attachment holes.

5. An end face heating device according to claim 1, characterized in that the axial position of the end cover (1) is provided with a port for mounting a pressure sensor.

6. An end-face heating device according to claim 1, characterized in that the material of the heating block (2) is copper.

7. An end-face heating device according to claim 1, characterized in that the number of heating blocks (2) is at least two, the heating blocks (2) together constituting a plate with a symmetrical structure.

8. An end-face heating device according to claim 1, characterized in that the connection of the end-cover (1) to the end to be heated is designed at the outer edge of the end-cover (1); the heating end face of the end cover (1) is smaller than the end face of the end part to be heated.

9. An end-face heating device as claimed in claim 1, characterized in that the end-cap (1) is wrapped with a ceramic fibre sheet.