Anti-overheat protection device for internal combustion generator set

Abstract

This utility model discloses an overheat protection device for an internal combustion generator set, relating to the field of generator set protection technology. The utility model includes a generator set body, a return pipe on the generator set body, a valve body fixedly installed on the return pipe, and a fixing seat fixedly connected to the top of the return pipe near the valve body. When performing overheat protection on the internal combustion generator set, a heat pipe is used to conduct heat to the coolant in the return pipe. During normal operation, the coolant temperature fluctuates within a certain range, and under the influence of the coolant's heat conduction, a piston moves, simultaneously adjusting the opening of the return pipe valve. Increasing the valve opening increases the flow rate and enhances heat dissipation; decreasing the valve opening decreases the flow rate and maintains the temperature. When the coolant temperature rises sharply, causing two metal contacts to come into contact, an alarm signal is triggered. This physical change achieves a change in the alarm signal, preventing signal interference and failure.

Description

Technical Field

[0001] This utility model relates to the field of generator set protection technology, specifically an overheat protection device for internal combustion generator sets. Background Technology

[0002] Internal combustion generator sets, as core equipment for ensuring emergency power supply and off-grid power supply, play an irreplaceable role in industrial production, public facilities, and emergency rescue. During operation, the continuous work of core components such as the cylinder and piston generates a large amount of heat, which must be dissipated in a timely manner by the coolant circulation system to maintain the unit's operation within a safe temperature range. If the coolant's heat dissipation efficiency is insufficient, the unit is prone to overheating, leading to a decrease in power performance, a shortened component life, and in extreme cases, even safety accidents such as cylinder cracking and fuel leakage. Therefore, overheat protection devices are a key component to ensure the reliable operation of generator sets.

[0003] However, traditional electronic temperature control protection systems rely on the linkage between temperature sensors and electronic control units. When the temperature exceeds the limit, protection is achieved by cutting off the fuel supply or triggering a shutdown. Although the response speed is fast, electronic components are prone to signal drift or failure in harsh environments such as generator vibration, oil contamination, and high temperature. To address the above problems, the inventors have proposed an overheat protection device for internal combustion generator sets. Utility Model Content

[0004] In order to solve the problem of overheat protection devices for internal combustion generator sets, the purpose of this utility model is to provide an overheat protection device for internal combustion generator sets.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an overheat protection device for an internal combustion generator set, comprising a generator set body, a return pipe provided on the generator set body, a valve body fixedly installed on the return pipe, a fixed seat fixedly connected to the top end of the return pipe near the valve body, a heat insulation cylinder rotatably connected to the top end of the fixed seat, a heat conduction pipe fixedly installed in the middle of the fixed seat, the top and bottom ends of the heat conduction pipe being respectively placed inside the heat insulation cylinder and the return pipe, a piston assembly provided inside the heat insulation cylinder, an extension rod fixedly connected to the top end of the valve shaft of the valve body, and one end of the piston rod rotatably connected to the extension rod.

[0006] Preferably, the piston assembly includes a piston plate that is slidably engaged inside the heat insulation cylinder. A piston rod is fixedly connected to one side of the piston plate, and one end of the piston rod extends movably to the outside of the heat insulation cylinder. One end of the piston rod is connected to a valve in the valve body.

[0007] Preferably, a limiting ring is fixedly connected inside the heat insulation cylinder, which divides the inside of the heat insulation cylinder into a sealed cavity and a movable cavity. A spring is provided between the side of the piston plate away from the limiting ring and the inner wall of the heat insulation cylinder, and the spring is movably sleeved on the outside of the piston rod.

[0008] Preferably, a fixing plate is fixedly connected to the side of the piston rod, a metal contact plate is fixedly installed on one side of the fixing plate, an L-shaped rod is fixedly connected to the side of the heat insulation cylinder near the metal contact plate, a metal contact plate is fixedly installed on the inner side of one end of the L-shaped rod, and a constant pressure hole is opened on the side of the heat insulation cylinder near the metal contact plate, the constant pressure hole is used to maintain the air pressure balance inside and outside the heat insulation cylinder.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] When performing overheat protection on an internal combustion generator set, a heat pipe is used to conduct heat to the coolant in the return pipe. During normal operation, the temperature of the coolant fluctuates within a certain range. Under the influence of the heat conducted by the coolant, the piston moves and simultaneously adjusts the opening of the return pipe valve. Increasing the valve opening increases the flow rate and enhances heat dissipation, while decreasing the valve opening decreases the flow rate and maintains the temperature. When the coolant temperature rises sharply, causing the two metal contacts to come into contact, an alarm signal is triggered. The alarm signal is changed through physical changes to prevent the signal from being interfered with and becoming invalid. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a partial cross-sectional view of the present invention.

[0014] Figure 3 This is a schematic diagram of the partially disassembled structure of this utility model.

[0015] In the diagram: 1. Generator body; 2. Return pipe; 3. Valve body; 4. Mounting base; 5. Heat insulation cylinder; 6. Heat conduction pipe; 7. Piston plate; 8. Piston rod; 9. Extension rod; 10. Spring; 11. Mounting plate; 12. Metal contact plate one; 13. Limiting ring; 14. L-shaped rod; 15. Metal contact plate two; 16. Constant pressure hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Figure 1-3 As shown, this utility model provides an overheat protection device for an internal combustion generator set, including a generator set body 1, a return pipe 2 on the generator set body 1, a valve body 3 fixedly installed on the return pipe 2, a fixed seat 4 fixedly connected to the top end of the return pipe 2 near the valve body 3, a heat insulation cylinder 5 rotatably connected to the top end of the fixed seat 4, a heat conduction pipe 6 fixedly installed in the middle of the fixed seat 4, the top and bottom ends of the heat conduction pipe 6 are respectively placed inside the heat insulation cylinder 5 and the return pipe 2, and a piston assembly is provided inside the heat insulation cylinder 5.

[0018] The piston assembly includes a piston plate 7, which is slidably engaged inside the heat insulation cylinder 5. A piston rod 8 is fixedly connected to one side of the piston plate 7. One end of the piston rod 8 extends movably to the outside of the heat insulation cylinder 5, and one end of the piston rod 8 is connected to the valve of the valve body 3.

[0019] By adopting the above technical solution, when the temperature of the coolant inside the return pipe 2 rises, the heat is conducted by the heat pipe 6 to heat the air inside the heat insulation cylinder 5, causing the air to expand thermally and push the piston plate 7 and piston rod 8 to slide to one side of the valve body 3, adjusting the size of the valve in the valve body 3. When the temperature rises, the valve opening increases, increasing the flow rate and enhancing heat dissipation.

[0020] A limiting ring 13 is fixedly connected inside the heat insulation cylinder 5, which divides the interior of the heat insulation cylinder 5 into a sealed cavity and a movable cavity.

[0021] By adopting the above technical solution and setting a limiting ring 13, it is convenient to limit the piston plate 7 and store air on one side of the limiting ring 13.

[0022] A spring 10 is provided between the side of the piston plate 7 away from the limiting ring 13 and the inner wall of the heat insulation cylinder 5. The spring 10 is movably sleeved on the outside of the piston rod 8.

[0023] By adopting the above technical solution and by setting the spring 10, when the temperature decreases, the air inside the return pipe 2 contracts, and the spring 10 resets the piston plate 7, reducing the flow rate and maintaining the temperature.

[0024] A fixing plate 11 is fixedly connected to the side of the piston rod 8. A metal contact piece 12 is fixedly installed on one side of the fixing plate 11. An L-shaped rod 14 is fixedly connected to the side of the heat insulation cylinder 5 near the metal contact piece 12. A metal contact piece 2 15 is fixedly installed on the inner side of one end of the L-shaped rod 14.

[0025] By adopting the above technical solution, when the piston rod 8 moves, it drives the metal contact piece 12 to move synchronously. When the temperature rises to the threshold, the metal contact piece 12 moves to contact the metal contact piece 15. At this time, the metal contact piece 12 and the metal contact piece 15 are in an energized state, thereby triggering the alarm to sound.

[0026] A constant pressure hole 16 is provided on the side of the heat insulation cylinder 5 near the metal contact plate 12. The constant pressure hole 16 is used to maintain the air pressure balance inside and outside the heat insulation cylinder 5.

[0027] By adopting the above technical solution and setting the constant pressure hole 16, it is easy to maintain the balance of air pressure inside and outside the heat insulation cylinder 5.

[0028] An extension rod 9 is fixedly connected to the top of the valve shaft of the valve body 3, and one end of the piston rod 8 is rotatably connected to the extension rod 9.

[0029] By adopting the above technical solution and setting the extension rod 9, it is easier to increase the rotation arm of the valve, thereby making it easier to push the extension rod 9 to rotate.

[0030] Working principle: Traditional internal combustion generators use water cooling for heat dissipation. When the coolant absorbs heat and rises, it circulates through the return pipe 2. The heat pipe 6 conducts heat to the returning coolant. The heat is conducted from one end of the heat pipe 6 to the inside of the heat insulation cylinder 5, heating the air inside the heat insulation cylinder 5. This causes the air to expand and push the piston plate 7 and piston rod 8 to slide along the inside of the heat insulation cylinder 5 towards the side of the spring 10. This pushes the extension rod 9 to rotate, increasing the opening of the valve body 3, increasing the flow rate, and enhancing heat dissipation. When the temperature rises sharply and the metal contact 12 and the metal contact 15 come into contact, the two metal contact 12 and the metal contact 15 are energized, thus triggering the alarm.

[0031] When the temperature of the coolant flowing back into the return pipe 2 decreases, the air inside the return pipe 2 contracts, and under the elastic force of the spring 10, it resets the piston plate 7, reduces the flow rate, and maintains the temperature.

[0032] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An overheat protection device for an internal combustion generator set, comprising a generator set body (1), characterized in that: The generator set body (1) is provided with a return pipe (2), and a valve body (3) is fixedly installed on the return pipe (2). A fixed seat (4) is fixedly connected to the top of the return pipe (2) near the valve body (3). A heat insulation cylinder (5) is rotatably connected to the top of the fixed seat (4). A heat conduction pipe (6) is fixedly installed in the middle of the fixed seat (4). The top and bottom of the heat conduction pipe (6) are respectively placed inside the heat insulation cylinder (5) and the return pipe (2). A piston assembly is provided inside the heat insulation cylinder (5).

2. The overheat protection device for an internal combustion generator set as described in claim 1, characterized in that, The piston assembly includes a piston plate (7), which is slidably engaged inside the heat insulation cylinder (5). A piston rod (8) is fixedly connected to one side of the piston plate (7). One end of the piston rod (8) extends movably to the outside of the heat insulation cylinder (5). One end of the piston rod (8) is connected to the valve of the valve body (3).

3. The overheat protection device for an internal combustion generator set as described in claim 1, characterized in that, The heat insulation cylinder (5) is fixedly connected to a limiting ring (13), which divides the interior of the heat insulation cylinder (5) into a sealed cavity and a movable cavity.

4. The overheat protection device for an internal combustion generator set as described in claim 2, characterized in that, A spring (10) is provided between the side of the piston plate (7) away from the limiting ring (13) and the inner wall of the heat insulation cylinder (5), and the spring (10) is movably sleeved on the outside of the piston rod (8).

5. The overheat protection device for an internal combustion generator set as described in claim 2, characterized in that, A fixing plate (11) is fixedly connected to the side of the piston rod (8). A metal contact piece (12) is fixedly installed on one side of the fixing plate (11). An L-shaped rod (14) is fixedly connected to the side of the heat insulation cylinder (5) near the metal contact piece (12). A metal contact piece (15) is fixedly installed on the inner side of one end of the L-shaped rod (14).

6. The overheat protection device for an internal combustion generator set as described in claim 5, characterized in that, The heat insulation cylinder (5) has a constant pressure hole (16) on the side near the metal contact plate (12), and the constant pressure hole (16) is used to maintain the air pressure balance inside and outside the heat insulation cylinder (5).

7. The overheat protection device for an internal combustion generator set as described in claim 2, characterized in that, An extension rod (9) is fixedly connected to the top of the valve shaft of the valve body (3), and one end of the piston rod (8) is rotatably connected to the extension rod (9).

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