阅读说明：本技术 一种加热器 (Heating device ) 是由 杨林龙 叶健松 于 2021-08-27 设计创作，主要内容包括：本发明涉及加热技术领域,尤其涉及一种加热器,其包括加热组,加热组包括壳体、多个蓄热体和加热棒。其中,壳体内设置有多个相平行的容置腔,相邻的容置腔之间贯通设置有连通腔,壳体上设置有流体入口和流体出口,流体入口和流体出口分别与一个容置腔连通。每个蓄热体设置在一个容置腔内,每个蓄热体内沿容置腔的长度方向贯穿设置有容置通孔,每个加热棒设置在一个容置通孔内。该加热器通过在多个容置腔内分别设置含有加热棒的蓄热体,即可增加换热面积,满足流体加热的温度范围要求。通过设置蓄热体吸收加热棒的热量并传导给流体,可以提高加热的稳定性,避免温度骤升骤降,保证产品的质量。(The invention relates to the technical field of heating, in particular to a heater which comprises a heating group, wherein the heating group comprises a shell, a plurality of heat accumulators and a heating rod. The shell is internally provided with a plurality of parallel containing cavities, a communicating cavity is arranged between every two adjacent containing cavities in a through mode, the shell is provided with a fluid inlet and a fluid outlet, and the fluid inlet and the fluid outlet are respectively communicated with one containing cavity. Every heat accumulator sets up in an holding intracavity, runs through along the length direction in holding chamber in every heat accumulator and is provided with the holding through-hole, and every heating rod sets up in a holding through-hole. The heat accumulators containing the heating rods are respectively arranged in the accommodating cavities of the heater, so that the heat exchange area can be increased, and the requirement of the fluid heating temperature range is met. The heat accumulator is arranged to absorb the heat of the heating rod and conduct the heat to the fluid, so that the heating stability can be improved, sudden temperature rise and drop are avoided, and the product quality is ensured.)

1. A heater, comprising:

a heating group (1), the heating group (1) comprising:

the device comprises a shell (11), wherein a plurality of parallel containing cavities are arranged in the shell (11), a communicating cavity is arranged between every two adjacent containing cavities in a penetrating manner, a fluid inlet and a fluid outlet are arranged on the shell (11), and the fluid inlet and the fluid outlet are respectively communicated with one containing cavity;

the heat accumulators (14) are arranged in the accommodating cavities, and accommodating through holes (141) penetrate through the heat accumulators (14) along the length direction of the accommodating cavities;

a plurality of heating rods (15), each heating rod (15) being disposed within one of the receiving through holes (141).

2. The heater according to claim 1, characterized in that N heating groups (1) are provided, the heater further comprises N-1 communication pipes (2), two ends of the communication pipes (2) are respectively communicated with the fluid inlet of one heating group (1) and the fluid outlet of the other heating group (1), wherein N is an integer and N is more than or equal to 2.

3. A heater according to claim 1, characterised in that it further comprises a clip for connecting adjacent heating groups (1).

4. The heater according to claim 3, wherein a support plate (112) is disposed on the housing (11), a first bayonet (1121) is disposed at an edge of the support plate (112) away from the housing (11), two second bayonets are disposed on opposite sides of the clamping plate, and the two second bayonets are respectively clamped with the first bayonets (1121) of the two adjacent heating sets (1).

5. The heater of claim 1, wherein two of said communicating chambers communicating with one of said receiving chambers are disposed adjacent to both ends of said receiving chamber, respectively.

6. The heater according to claim 1, characterized in that said heating group (1) comprises a connecting cover (13) and a sealing cover (12) respectively removably connected to said housing (11), said connecting cover (13) and said sealing cover (12) being respectively arranged at different ends of said housing chamber, said connecting cover (13) being provided with a through-flow hole, said through-flow hole being said fluid inlet or said fluid outlet.

7. The heater according to claim 1, wherein the heat storage body (14) includes a heat storage shaft and a plurality of fins (1431) provided on an outer wall of the heat storage shaft, a length direction of each of the fins (1431) coincides with an axial direction of the heat storage shaft, and the plurality of fins (1431) are arranged at regular intervals in a circumferential direction of the heat storage shaft.

8. The heater according to claim 6, characterised in that the connecting line of the heating rod (15) is arranged through the connecting cover (13) or the sealing cover (12), the penetration being sealed by welding.

9. The heater according to claim 6, characterized in that it further comprises a sealing gasket disposed between the connecting cover (13) and the casing (11), or between the sealing cover (12) and the casing (11).

10. A heater according to any one of claims 1 to 9, further comprising a first temperature sensor, wherein the space in the housing chamber where the heat storage body (14) is not located is a fluid chamber, and a temperature measuring end of the first temperature sensor is located in the fluid chamber.

Technical Field

The invention relates to the technical field of heating, in particular to a heater.

Background

The core making is a process of making core sand into a sand core which conforms to the shape of a core box. The heater is required to rapidly heat the air to the temperature range of 300-350 ℃ in the core making process, so the heater becomes necessary equipment in the core making production process.

The existing heater has the phenomenon of unstable heating power, so that the temperature change of air at an outlet is large, the manufacturing process of the sand core is unstable, and the quality fluctuation of a sand core product is large. In addition, the existing heater also has the problems of low outlet air temperature, long product curing time, low production efficiency and the like.

Therefore, a heater is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a heater, which can ensure stable heating power and meet the temperature range of fluid heating.

In order to achieve the purpose, the invention adopts the following technical scheme:

a heater, comprising:

a heating group, the heating group comprising:

the device comprises a shell, a plurality of parallel containing cavities are arranged in the shell, a communicating cavity is arranged between every two adjacent containing cavities in a penetrating manner, a fluid inlet and a fluid outlet are arranged on the shell, and the fluid inlet and the fluid outlet are respectively communicated with one containing cavity;

each heat accumulator is arranged in one accommodating cavity, and an accommodating through hole penetrates through each heat accumulator along the length direction of the accommodating cavity;

and each heating rod is arranged in one accommodating through hole.

Optionally, the number of the heating groups is N, the heater further includes N-1 communication pipes, two ends of each communication pipe are respectively communicated with the fluid inlet of one heating group and the fluid outlet of another heating group, where N is an integer and N is greater than or equal to 2.

Optionally, the heater further comprises a clamping plate for connecting adjacent heating groups.

Optionally, a support plate is arranged on the casing, a first bayonet is formed in the edge, far away from the casing, of the support plate, two second bayonets are formed in the side edge of the clamping plate oppositely, and the two second bayonets are clamped with the first bayonets of the two adjacent heating groups respectively.

Optionally, the two communicating cavities communicated with one accommodating cavity are respectively arranged near two ends of the accommodating cavity.

Optionally, the heating group includes a connection cover and a sealing cover detachably connected to the housing, the connection cover and the sealing cover are respectively disposed at different ends of the accommodating chamber, the connection cover is provided with a circulation through hole, and the circulation through hole is the fluid inlet or the fluid outlet.

Optionally, the heat accumulator includes a heat storage shaft and a plurality of fins provided on an outer wall of the heat storage shaft, a length direction of each of the fins is in accordance with an axial direction of the heat storage shaft, and the plurality of fins are arranged at regular intervals in a circumferential direction of the heat storage shaft.

Optionally, the connecting line of the heating rod passes through the connecting cover or the sealing cover, and the penetrating position is sealed by welding.

Optionally, the heater further comprises a sealing gasket disposed between the connecting cover and the housing, or between the sealing cover and the housing.

Optionally, the heater further includes a first temperature sensor, a space of the accommodating chamber where the heat accumulator is not disposed is a fluid chamber, and a temperature measuring end of the first temperature sensor is disposed in the fluid chamber.

The invention has the beneficial effects that:

the invention provides a heater which comprises a heating group, wherein the heating group comprises a shell, a plurality of heat accumulators and a heating rod. The shell is internally provided with a plurality of parallel containing cavities, a communicating cavity is arranged between every two adjacent containing cavities in a through mode, the shell is provided with a fluid inlet and a fluid outlet, and the fluid inlet and the fluid outlet are respectively communicated with one containing cavity. Every heat accumulator sets up in an holding intracavity, runs through along the length direction in holding chamber in every heat accumulator and is provided with the holding through-hole, and every heating rod sets up in a holding through-hole. The heat accumulators containing the heating rods are respectively arranged in the accommodating cavities of the heater, so that the heat exchange area can be increased, and the requirement of the fluid heating temperature range is met. The heat accumulator is arranged to absorb the heat of the heating rod and conduct the heat to the fluid, so that the heating stability can be improved, sudden temperature rise and drop are avoided, and the product quality is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a heater provided in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a heat storage body and a sealing cover according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a sealing cap according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a connection cover and a heating rod according to an embodiment of the present invention.

In the figure:

1. a heating group; 11. a housing; 111. a main body; 112. a support plate; 1121. a first bayonet;

12. a sealing cover; 121. sealing the positioning groove; 122. sealing and positioning protrusions; 123. sealing the positioning hole;

13. a connecting cover; 131. connecting and positioning the protrusions; 132. connecting the positioning holes;

14. a heat accumulator; 141. an accommodating through hole; 142. a connecting section; 143. a heat exchange section; 1431. a fin;

15. a heating rod;

2. and a communication pipeline.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; 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.

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 under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

During the core production process, the heater is required to rapidly heat the air to the temperature range of 300-350 ℃, and the existing heaters comprise an integral heater and a fabricated heater. The heating power of the integral heater is unstable, which easily causes the problems of unstable manufacturing process of the sand core, high rejection rate, large product quality fluctuation and the like. The assembled heater has the problems of low outlet air temperature, long product curing time, low production efficiency and the like. Accordingly, the present embodiment provides a heater to solve the above-described problems.

As shown in fig. 1 to 2, the heater includes a heating block 1, and the heating block 1 includes a case 11, a plurality of heat accumulators 14, and a heating rod 15. Wherein, be provided with a plurality of holding chambeies that parallel in the casing 11, link up between the adjacent holding chamber and be provided with the intercommunication chamber to realize the intercommunication between the adjacent holding chamber. Optionally, two communicating chambers communicating with one accommodating chamber are respectively arranged near two ends of the accommodating chamber. That is, the communicating chambers are arranged in a staggered manner, fluid flows from one end of one accommodating chamber to the other end, then enters one end of the other accommodating chamber through the communicating chamber, and then flows to the other end of the communicating chamber, and so on. The setting can avoid certain fluid velocity of flow to hang down like this, the uneven condition of temperature, has guaranteed the mobility of the fluid in every holding intracavity promptly to improve the homogeneity of fluid heating.

The housing 11 is provided with a fluid inlet and a fluid outlet, and the fluid inlet and the fluid outlet are respectively communicated with one accommodating cavity. The fluid enters the first containing cavity from the fluid inlet, then flows through one or more containing cavities in sequence, and is output from the fluid outlet. Optionally, the shell 11 is a unitary iron casting, which has high strength and can effectively ensure the stability of the operation of the heater.

Optionally, a heat accumulator 14 is disposed in each accommodating cavity, a heating rod 15 is disposed in each heat accumulator 14, and in order to facilitate installation of the heat accumulator 14 and the heating rod 15 in the accommodating cavity and subsequent maintenance and replacement, the heating group 1 optionally includes a connecting cover 13 and a sealing cover 12 which are detachably connected to the housing 11 respectively. Specifically, the connecting cover 13 and the sealing cover 12 are respectively disposed at different ends of the accommodating chamber, and the connecting cover 13 is provided with a through hole, which is a fluid inlet or a fluid outlet. That is, both ends of each accommodating chamber of the housing 11 are provided with openings, and each opening is provided with a connecting cover 13 or a sealing cover 12. Wherein, a connecting cover 13 is arranged at the opening part which needs to be provided with a fluid inlet or a fluid outlet, and a sealing cover 12 is arranged at the other opening part.

As shown in fig. 3-4, in order to detachably connect the sealing cover 12 or the connecting cover 13 to the housing 11, optionally, the sealing cover 12 is provided with a sealing positioning hole 123 for screwing with the housing 11. Similarly, the connection cover 13 is also provided with a connection positioning hole 132 for screwing with the housing 11. Optionally, the heater further comprises a sealing gasket, the sealing gasket is arranged between the connecting cover 13 and the housing 11, and the sealing gasket is also arranged between the sealing cover 12 and the housing 11. The sealing gasket is arranged to ensure the sealing performance between the connecting cover 13 or the sealing cover 12 and the housing 11 so as to prevent the fluid leakage from the contact surface between the connecting cover 13 or the sealing cover 12 and the housing 11.

As shown in fig. 3, in order to facilitate the rapid fitting of the sealing cover 12 and the housing 11, the sealing positioning protrusion 122 is annularly disposed on the inner side of the sealing cover 12, and the sealing positioning protrusion 122 abuts against the inner wall surface of the housing 11, that is, the side wall surface of the accommodating cavity, so that the sealing cover 12 is clamped on the housing 11, thereby achieving the rapid positioning and facilitating the screwing.

In order to facilitate positioning of the heat accumulator 14 and ensure that the heat accumulator 14 does not contact the side wall of the receiving cavity, thereby making the fluid flow characteristics around the heat accumulator 14 uniform, optionally, the inner side of the sealing cover 12 is provided with a sealing positioning groove 121, and the end portion of the heat accumulator 14 is inserted into the sealing positioning groove 121. An expansion gap is left between the bottom surface of the seal positioning groove 121 and the end surface of the heat accumulator 14, so that deformation caused by different expansion coefficients of materials is prevented.

As shown in fig. 4, similarly, the inner ring of the connection cover 13 is provided with a connection positioning protrusion 131, and the end portion of the heat storage body 14 can be inserted into the connection positioning protrusion 131, that is, the side wall of the end portion of the heat storage body 14 abuts against the inner ring side wall of the connection positioning protrusion 131, and similarly, the heat storage body 14 can be positioned.

Optionally, the heater further comprises a first temperature sensor, the space in the accommodating cavity where the heat accumulator 14 is not arranged is a fluid cavity, and the temperature measuring end of the first temperature sensor is arranged in the fluid cavity. A fluid can flow within the fluid chamber and a first temperature sensor can measure a temperature of the fluid. Preferably, the temperature measuring end of the first temperature sensor is arranged in the fluid cavity close to the fluid outlet so as to obtain the outlet temperature of the fluid.

Optionally, the heater further comprises a second temperature sensor, the temperature sensing end of which is disposed on the thermal mass 14 to prevent overheating of the thermal mass 14. The temperature measured by the second temperature sensor can be monitored according to the requirement of the sand core production process, and the heating power of the heating rod 15 is controlled together by combining the fluid temperature measured by the first temperature sensor, so that the energy is prevented from being wasted.

Alternatively, the heat storage body 14 includes a heat storage shaft and a plurality of fins 1431 provided on an outer wall of the heat storage shaft, and the heat storage body 14 is divided into the connection section 142 at both ends and the heat exchange section 143 in the middle in the axial direction of the heat storage body 14, and the fins 1431 are provided on an outer wall of the heat storage shaft of the heat exchange section 143. Specifically, the length direction of each fin 1431 coincides with the axial direction of the heat storage shaft, and the plurality of fins 1431 are arranged evenly at intervals in the circumferential direction of the heat storage shaft. The fins 1431 may increase the heat exchange area between the heat storage body 14 and the fluid, and increase the heat exchange efficiency.

Optionally, each heat storage body 14 is provided with a receiving through hole 141 penetrating along the length direction of the receiving cavity, and each heating rod 15 is provided in one receiving through hole 141. In the present embodiment, the axial direction of the heat storage body 14 is the same as the length direction of the accommodating cavity, that is, the heat storage body 14 is provided with accommodating through holes 141 along the axial direction, and one heating rod 15 is disposed in one accommodating through hole 141. Alternatively, a plurality of accommodating through holes 141 may be provided at intervals according to the size of the heat storage shaft, and one heating rod 15 is provided in each accommodating through hole 141 to increase the maximum heating power, so as to adapt to the situation of high flow rate of the fluid to be heated or high outlet temperature. Optionally, the connecting line of the heating rod 15 is arranged through the connecting cover 13 or the sealing cover 12, and the penetrating position is sealed by welding to ensure the sealing performance of the penetrating position.

Optionally, when a single heating group works, the number of the electrified heating rods and the heating power of each heating rod 15 can be controlled according to the size of the produced sand core, so that the total heating power is controlled, flexible regulation and control are realized, and energy waste is avoided.

Alternatively, the heat storage body 14 is made of red copper. Compared with aluminum alloy, the red copper has larger mass in unit volume and stronger relative heat storage capacity, and the heat transfer coefficient of the red copper is higher than that of the aluminum alloy, so that under the condition of the same heat exchange area and contact time, the red copper has stronger heating capacity to air in unit time, the outlet temperature of fluid is high, and when the red copper is applied to the core making technical field, the solidification time can be effectively reduced, the production efficiency is improved, and energy conservation and emission reduction are realized. Moreover, the heat accumulator 14 made of red copper can be formed by a hot extrusion process, so that the processing cost is low, and the economic benefit can be effectively improved.

Optionally, the heater is provided with N heating groups 1, the heater further comprises N-1 communication pipelines 2, two ends of each communication pipeline 2 are respectively communicated with a fluid inlet of one heating group 1 and a fluid outlet of the other heating group 1, wherein N is an integer and is greater than or equal to 2. Namely, the heater can be expanded into a plurality of heating groups 1 to work in series by arranging the communicating pipeline 2, so that the overall heating power of the heater is improved, and the application range of the heater is wider.

Optionally, the housing 11 includes a main body 111 and a support plate 112 annularly disposed on an outer wall of the main body 111, and the support plate 112 can facilitate support and fixation of the housing 11. The heater also includes a clip for connecting adjacent heating groups 1. Optionally, the edge of the support plate 112 away from the housing 11 is provided with a first bayonet 1121, two second bayonets are oppositely provided on the side edge of the clamping plate, and the two second bayonets are respectively clamped with the first bayonets 1121 of the two adjacent heating groups 1, so that the two adjacent heating groups 1 can be spliced and fixed.

To reduce heat dissipation from the heater, a nano thermal barrier coating is optionally applied to the outer wall of the housing 11. Optionally, after the plurality of heating groups 1 are fixed, the outer side of the overall heater structure is wrapped with a fiber blanket to fill and level the concave part of the heater shape. Optionally, a nano-insulation board is laid on the outer side of the heater and the fiber blanket integral structure, so as to further improve the heat insulation performance of the heater.

The heating group 1 of the heater can increase the heat exchange area by respectively arranging the heat accumulators 14 containing the heating rods 15 in the plurality of accommodating cavities, thereby meeting the temperature range requirement of fluid heating. And the heat accumulator 14 absorbs the heat of the heating rod 15 and conducts the heat to the fluid, so that the heating stability can be improved, the sudden temperature rise and drop can be avoided, and the product quality can be ensured. Moreover, the heater can realize splicing series connection of a plurality of groups of heating groups 1, the overall heating power of the heater is expanded, splicing treatment is simple and convenient, and the working efficiency can be effectively improved.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.