Preheating device for engine cylinder block

Abstract

The utility model belongs to the technical field of engine cylinder body machining, and particularly relates to an engine cylinder body preheating device which comprises a preheating furnace, preheating cavities are formed in the preheating furnace, the preheating cavities are divided into a left group and a right group which are parallel, and each group is composed of a plurality of preheating cavities which are parallel up and down. Air inlet channels are formed in the opposite faces of the outer sides of the two sets of preheating cavities, backflow channels are formed in the opposite faces of the inner sides of the two sets of preheating cavities, and the preheating cavities communicate with the interior of the preheating furnace. Two electric heaters are used for heating the eight cavities, energy consumption can be effectively reduced through a hot air recycling structure unit, and due to the fact that all the cavities are communicated with one another, it can be guaranteed that the temperatures of all the cavities are consistent; the cavity can be uniformly and accurately heated to a required temperature within a limited time through a plurality of temperature sensors and a PID temperature controller; waste gas such as oil gas volatilized from the tile cover of the cylinder body can be exhausted through the ventilation fan, and explosion caused by the fact that the oil gas concentration is too high is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine cylinder processing, and in particular relates to an engine cylinder preheating device. Background Art

[0002] With the increasing improvement and progress of automobile engine technology, many technologically advanced OEMs have adopted cylinder bore spraying technology, canceled the traditional cast iron cylinder liner design, and used the spraying technology to heat the cylinder body. Then the spraying gun sprays the alloy melt heated to thousands of degrees into the cylinder, and then the coating is ground into a 0.2mm thick spray film through the mirror honing process. The thinner "cylinder liner" allows the cylinder to have a better cooling effect, and having a better cooling effect means that the compression ratio can be appropriately increased without causing the cylinder temperature to be too high and produce knocking, thereby further squeezing the engine performance;

[0003] The most critical preparatory work for the spraying technology is the precise heating of the cylinder body, which must meet the beat requirements of the OEM production line and be able to produce automatically. Therefore, a device that can achieve the above functions is urgently needed.

[0004] In order to solve the above problems, this application proposes an engine cylinder preheating device. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides an engine cylinder preheating device, which has the characteristics of uniform preheating, low energy consumption and precise temperature control.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an engine cylinder block preheating device, comprising a preheating furnace, wherein a preheating chamber is formed inside the preheating furnace, wherein the preheating chamber is divided into two groups arranged side by side on the left and right, each group is composed of a plurality of preheating chambers arranged side by side up and down, an air intake channel is formed on the outer opposite surfaces of the two groups of preheating chambers, and a reflux channel is formed on the inner opposite surfaces of the two groups of preheating chambers, the preheating chamber is communicated with the interior of the preheating furnace, and a partition is further arranged between the two preheating chambers arranged side by side up and down, symmetrically distributed circulation fans are arranged at both ends of the top of the preheating furnace, a connecting channel is arranged between the two circulating fans, and two electric heaters are arranged on one side of the connecting channel, and a ventilation fan communicating with the interior of the preheating furnace is also arranged on the top of the preheating furnace, a plurality of No. 1 sensors for detecting working temperature are arranged inside the preheating furnace, a plurality of No. 2 sensors for detecting alarm temperature are arranged inside the preheating furnace, a No. 3 sensor for detecting part temperature is arranged inside each of the preheating chambers, and a No. 4 sensor for detecting exhaust gas emission temperature is arranged inside the preheating furnace.

[0007] As a preferred technical solution of the utility model, an air inlet is provided at the upper end of the preheating chamber, and an air outlet is provided at the lower end of the preheating chamber. The airflow inside the air inlet channel is introduced into the preheating chamber through the lower end of the partition, and is introduced into the reflux channel through the upper end of the partition.

[0008] As a preferred technical solution of the utility model, the top of the air inlet channel is connected to the exhaust end of the circulating fan, the top of the reflow channel is connected to the connecting channel, the connecting channel is connected to the air inlet end of the circulating fan, and the gas inside the connecting channel is heated by an electric heater.

[0009] As a preferred technical solution of the utility model, a ventilation port is opened on the side of the preheating furnace, and the air inlet end of the ventilation fan is connected to the interior of the preheating furnace.

[0010] As a preferred technical solution of the utility model, a positioning frame for suspending the parts is provided inside the preheating chamber, and the front end of the preheating furnace is provided with chamber doors with the same number as the preheating chamber.

[0011] As a preferred technical solution of the utility model, a heat-insulating layer is provided inside the preheating furnace.

[0012] Compared with the prior art, the utility model has the following beneficial effects: eight chambers are heated by two electric heaters, and the energy consumption can be effectively reduced by circulating the hot air structural unit. Since each chamber is interconnected, the temperature of each chamber can be kept consistent. Through multiple temperature sensors and PID temperature controllers, the cavity can be heated to the required temperature evenly and accurately within a limited time. The exhaust fan can exhaust the oil and gas volatilized from the cylinder head to avoid excessive oil and gas concentration and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is an isometric structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the internal airflow direction of the utility model;

[0018] Figure 5It is a structural schematic diagram of an enlarged heating chamber part in the utility model;

[0019] In the figure: 1. preheating furnace; 2. preheating chamber; 3. air inlet channel; 4. reflux channel; 5. air inlet; 6. air outlet; 7. partition; 8. circulation fan; 9. electric heater; 10. ventilation fan; 11. ventilation outlet; 12. sensor No. 1; 13. sensor No. 2; 14. sensor No. 3; 15. sensor No. 4; 16. positioning frame; 17. insulation layer; 18. chamber door. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example

[0022] See also Figure 1-5 The utility model provides the following technical solutions: an engine cylinder preheating device, comprising a preheating furnace 1, a preheating chamber 2 is formed inside the preheating furnace 1, the preheating chamber 2 is composed of two groups of preheating chambers 2 arranged side by side, each group is composed of a plurality of preheating chambers 2 arranged side by side, an air intake channel 3 is formed on the outer opposite surfaces of the two groups of preheating chambers 2, a reflux channel 4 is formed on the inner opposite surfaces of the two groups of preheating chambers 2, the preheating chamber 2 is interconnected with the interior of the preheating furnace 1, and a partition 7 is arranged between the two preheating chambers 2 arranged side by side, and two ends of the top of the preheating furnace 1 are provided with There are symmetrically distributed circulation fans 8, a connecting channel is provided between the two circulation fans 8, two electric heaters 9 are provided on one side of the connecting channel, a ventilation fan 10 which is interconnected with the interior of the preheating furnace 1 is also provided on the top of the preheating furnace 1, a number of No. 1 sensors 12 for detecting the working temperature are provided inside the preheating furnace 1, a number of No. 2 sensors 13 for detecting the alarm temperature are provided inside the preheating furnace 1, each preheating chamber 2 is provided with a No. 3 sensor 14 for detecting the temperature of the parts, and a No. 4 sensor 15 for detecting the exhaust gas emission temperature is provided inside the preheating furnace 1.

[0023] Specifically, an air inlet 5 is provided at the upper end of the preheating chamber 2, and an air outlet 6 is provided at the lower end of the preheating chamber 2. The air flow inside the air inlet channel 3 is introduced into the preheating chamber 2 through the lower end of the partition 7, and is introduced into the reflux channel 4 through the upper end of the partition 7. In this embodiment, the air flow directions of the air inlet 5 and the air outlet 6 are diagonally arranged, and the hot air flow can fully pass through the preheating chamber 2, thereby ensuring the heating effect of the cylinder body.

[0024] Specifically, the top of the air intake channel 3 is connected to the exhaust end of the circulating fan 8, the top of the reflux channel 4 is connected to the connecting channel, the connecting channel is connected to the air intake end of the circulating fan 8, and the gas inside the connecting channel is heated by the electric heater 9. In this embodiment, air intake is achieved on both sides and reflux is achieved in the middle, so that uniform heating of the cylinder body in all cavities can be achieved.

[0025] Specifically, a ventilation port 11 is opened on the side of the preheating furnace 1, and the air inlet end of the ventilation fan 10 is connected to the interior of the preheating furnace 1. In this embodiment, the ventilation fan 10 and the ventilation port 11 are used in conjunction to exhaust the waste gas such as oil and gas volatilized from the cylinder head, thereby avoiding excessive oil and gas concentration and causing an explosion.

[0026] Specifically, a positioning frame 16 for suspending the parts is provided inside the preheating chamber 2, and the front end of the preheating furnace 1 is provided with chamber doors 18 with the same number as the preheating chamber 2. In this embodiment, the positioning frame 16 fixes the parts inside the preheating chamber 2, and the parts are not in contact with the preheating chamber 2 on all sides, thereby ensuring the passage of hot air flow and uniform heating of the cylinder body.

[0027] Specifically, a heat-insulating layer 17 is provided inside the preheating furnace 1. In this embodiment, the heat-insulating layer 17 plays a role in heat-insulating the inside of the preheating furnace 1, reduces the loss caused by heat conduction, and ensures the heating effect.

[0028] Working principle and use process of the utility model: the application can directly complete the automatic heating and precise temperature control of the cylinder body through the main control unit, and provide heating air through the electric heater 9, which is then transported along the air inlet channel 3 by the electric heater 9. The hot air enters the interior of the preheating chamber 2 from the air inlet channel 3 through the air inlet 5, and then is discharged from the air outlet 6 to the return channel 4. The airflow after heat exchange enters the electric heater 9 along the return channel 4 to be heated again, and circulation is realized through the circulating fan 8;

[0029] The temperature is collected by multiple temperature sensors at each cavity and electric heater. The signal is transmitted to the PID temperature controller, which accurately adjusts the electric heater so that each heated cylinder is evenly heated to a specific temperature within a specific time.

[0030] When the temperature is too high or the oil and gas content is high, the ventilation fan 10 works to discharge the high-temperature gas inside the preheating furnace 1, and fresh air enters from the ventilation port 11 to ensure heating safety.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An engine cylinder block preheating device, comprising a preheating furnace (1), wherein a preheating chamber (2) is formed inside the preheating furnace (1), characterized in that: The preheating chamber (2) is composed of two groups arranged side by side, each group is composed of a plurality of preheating chambers (2) arranged side by side up and down, the outer opposite surfaces of the two groups of preheating chambers (2) are formed with air inlet channels (3), and the inner opposite surfaces of the two groups of preheating chambers (2) are formed with return channels (4), the preheating chamber (2) and the interior of the preheating furnace (1) are interconnected, and a partition (7) is also arranged between the two preheating chambers (2) arranged side by side up and down, and symmetrically distributed circulation fans (8) are arranged at both ends of the top of the preheating furnace (1), and a connecting fan (8) is arranged between the two circulation fans (8). A channel is provided, two electric heaters (9) are provided on one side of the connecting channel, a ventilation fan (10) is also provided on the top of the preheating furnace (1) and is communicated with the interior of the preheating furnace (1), a plurality of No. 1 sensors (12) for detecting the working temperature are provided inside the preheating furnace (1), a plurality of No. 2 sensors (13) for detecting the alarm temperature are provided inside the preheating furnace (1), a No. 3 sensor (14) for detecting the temperature of the parts is provided inside each of the preheating chambers (2), and a No. 4 sensor (15) for detecting the exhaust gas emission temperature is provided inside the preheating furnace (1).

2. The engine cylinder preheating device according to claim 1, characterized in that: The upper end of the preheating chamber (2) is provided with an air inlet (5), and the lower end of the preheating chamber (2) is provided with an air outlet (6). The air flow inside the air inlet channel (3) is introduced into the preheating chamber (2) through the lower end of the partition (7), and is introduced into the return channel (4) through the upper end of the partition (7).

3. The engine cylinder preheating device according to claim 1, characterized in that: The top of the air inlet channel (3) is connected to the exhaust end of the circulating fan (8), the top of the reflow channel (4) is connected to the connecting channel, the connecting channel is connected to the air inlet end of the circulating fan (8), and the gas inside the connecting channel is heated by an electric heater (9).

4. The engine cylinder preheating device according to claim 1, characterized in that: A ventilation port (11) is provided on the side of the preheating furnace (1), and an air inlet end of the ventilation fan (10) is connected to the interior of the preheating furnace (1).

5. The engine cylinder preheating device according to claim 1, characterized in that: A positioning frame (16) for suspending parts is provided inside the preheating chamber (2), and the front end of the preheating furnace (1) is provided with chamber doors (18) of the same number as the preheating chamber (2).

6. The engine cylinder preheating device according to claim 1, characterized in that: A heat-insulating layer (17) is provided inside the preheating furnace (1).

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