Diesel drive unit temperature and pressure detection device

Abstract

This utility model discloses a temperature and pressure detection device for diesel drive units, relating to the field of diesel drive unit testing. It includes a connecting cavity and a mechanical cavity, with a diaphragm between them. A pressure detection mechanism and a temperature detection mechanism are installed on the mechanical cavity. The pressure detection mechanism includes a diaphragm cylinder fixedly connected to the diaphragm, and a metal elastic sheet fixedly connected between the diaphragm cylinder and a housing. A strain gauge is installed on the metal elastic sheet. The temperature detection mechanism includes a housing fixedly connected to the mechanical cavity. This utility model forms a pressure and temperature transmission channel by bolting the connecting cavity, diaphragm, and mechanical cavity. The pressure and temperature detection mechanisms enable accurate detection of pressure and temperature, overcoming the shortcomings of traditional instruments, ensuring safe equipment operation, and improving the stability and reliability of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine unit testing, and in particular to a diesel engine unit temperature and pressure testing device. Background Technology

[0002] A diesel-powered generator set, typically referring to a diesel generator set, consists of a diesel engine and a generator. It is a series of devices that use diesel fuel to convert the heat energy released from fuel combustion into electrical or mechanical energy. In existing diesel-powered generator set operation monitoring technologies, temperature and pressure are two crucial monitoring parameters. Temperature reflects the unit's thermal state and the efficiency of its cooling system, while pressure directly relates to the unit's mechanical load and combustion efficiency.

[0003] Traditional pressure testing often uses mechanical pressure gauges, which have low accuracy and slow response speed, and cannot reflect minute pressure changes in real time and quickly. Traditional temperature detection devices use thermocouples, which require external instruments to display the temperature. This is complicated to operate, and they are prone to damage or failure in high-temperature environments, failing to meet the detection requirements and adversely affecting the safe operation of equipment. Furthermore, traditional detection methods often install temperature and pressure sensors separately, increasing the complexity of installation and maintenance. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a temperature and pressure detection device for diesel drive units.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A diesel engine unit temperature and pressure detection device includes a connecting cavity and a mechanical cavity. One end of the connecting cavity is connected to the diesel engine unit. A diaphragm is provided between the connecting cavity and the mechanical cavity. The connecting cavity, the mechanical cavity, and the diaphragm are locked together by bolts. A pressure detection mechanism and a temperature detection mechanism are installed on the mechanical cavity.

[0007] The pressure detection mechanism includes a diaphragm cylinder fixedly connected to the diaphragm sheet, a metal elastic sheet fixedly connected between the diaphragm cylinder and the housing, and a strain gauge installed on the metal elastic sheet. The temperature detection mechanism includes a housing fixedly connected to the mechanical cavity, the end of the housing passing through the diaphragm cylinder and entering the connecting cavity, and a pointer and a bimetallic strip being provided inside the housing.

[0008] Preferably, a piston for sealing the diaphragm cylinder is fixedly sleeved on the outer wall of the housing, and an O-ring seal is provided between the piston and the inner wall of the diaphragm cylinder.

[0009] Preferably, a rotating rod is rotatably disposed inside the housing via a sealed bearing, the bimetallic strip is sleeved on the rotating rod and one end of the bimetallic strip is fixedly connected to the rotating rod, a dial is fixedly connected inside the housing, and a pointer is fixedly connected to one end of the rotating rod and cooperates with the dial to display the temperature.

[0010] Preferably, a terminal block is fixedly connected to the dial, the pointer is a conductive material component, the rotating rod is an insulating material component, the terminal block and the pointer are respectively connected to the diesel drive unit control system via shielded cables, and the circuit is activated when the pointer contacts the terminal block to realize temperature alarm.

[0011] Preferably, the strain gauge is electrically connected to the diesel drive unit control system via a shielded cable.

[0012] Preferably, the strain gauge is fixedly connected to both sides of the metal elastic sheet, and the strain gauge and the metal elastic sheet are insulated from each other.

[0013] Preferably, the housing is a polyetheretherketone (PEEK) material component.

[0014] Preferably, the bimetallic strip is spiral-shaped and is made of two metals with different coefficients of thermal expansion, nickel-based alloy and copper, by welding or rolling.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this application, the internal pressure is transmitted to the diaphragm through the connecting cavity. The diaphragm pushes the diaphragm cylinder and acts on the metal elastic sheet to cause it to deform. The strain gauges on both sides of the metal elastic sheet generate resistance changes due to compression or stretching, and transmit the voltage difference signal of the strain gauges to the control system, thereby realizing accurate detection of pressure, ensuring safe operation of the equipment, and improving the stability and reliability of the equipment operation.

[0017] 2. In this application, the spiral bimetallic strip inside the housing bends due to temperature changes, causing the rotating rod and pointer to rotate. The temperature value can be displayed intuitively on the dial. When the temperature reaches the set threshold, the pointer contacts the terminal, the circuit is connected, and an alarm signal is triggered. This realizes real-time monitoring and early warning of temperature, effectively preventing equipment failure or safety accidents caused by excessive temperature, ensuring safe operation of the equipment, and improving the stability and reliability of equipment operation. Attached Figure Description

[0018] Figure 1 This utility model presents a three-dimensional structural schematic diagram of a diesel engine temperature and pressure detection device;

[0019] Figure 2 A partial cross-sectional schematic diagram of the temperature and pressure detection device for a diesel-driven generator set is provided for this utility model; 1;

[0020] Figure 3 A partial cross-sectional schematic diagram of the temperature and pressure detection device for a diesel-driven generator set is provided for this utility model; II;

[0021] Figure 4 A partial cross-sectional schematic diagram of the temperature and pressure detection device for a diesel-driven generator set is provided for this utility model; III;

[0022] Figure 5 This utility model proposes a temperature and pressure detection device for diesel drive units. Figure 4 Enlarged diagram of point A in the middle.

[0023] Legend: 100, connecting cavity; 200, mechanical cavity; 300, diaphragm; 400, pressure detection mechanism; 401, diaphragm cylinder; 402, metal elastic sheet; 403, strain gauge; 500, temperature detection mechanism; 501, housing; 502, pointer; 503, bimetallic strip; 504, rotating rod; 505, dial; 506, terminal block; 600, piston; 601, O-ring seal. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] like Figure 1-5 As shown, this utility model provides a temperature and pressure detection device for a diesel drive unit, including a connecting cavity 100 and a mechanical cavity 200. One end of the connecting cavity 100 is connected to the diesel drive unit. A diaphragm 300 is provided between the connecting cavity 100 and the mechanical cavity 200. The connecting cavity 100, the mechanical cavity 200 and the diaphragm 300 are locked together by bolts. A pressure detection mechanism 400 and a temperature detection mechanism 500 are installed on the mechanical cavity 200.

[0027] The pressure detection mechanism 400 includes a diaphragm cylinder 401 fixedly connected to the diaphragm sheet 300. A metal elastic sheet 402 is fixedly connected between the diaphragm cylinder 401 and the housing 501. A strain gauge 403 is installed on the metal elastic sheet 402. The temperature detection mechanism 500 includes a housing 501 fixedly connected to the mechanical cavity 200. The end of the housing 501 passes through the diaphragm cylinder 401 and enters the connecting cavity 100. A pointer 502 and a bimetallic strip 503 are provided inside the housing 501.

[0028] In this embodiment, a piston 600 is fixedly sleeved on the outer wall of the housing 501 to seal the diaphragm cylinder 401. An O-ring seal 601 is provided between the piston 600 and the inner wall of the diaphragm cylinder 401. The piston 600 and the O-ring seal 601 ensure the sealing between the diaphragm cylinder 401 and the housing 501, maintain the pressure in the connecting cavity 100, and at the same time, ensure the sealing without affecting the movement of the diaphragm cylinder 401.

[0029] In this embodiment, a rotating rod 504 is rotatably disposed inside the housing 501 via a sealed bearing. A bimetallic strip 503 is sleeved on the rotating rod 504, with one end of the strip fixedly connected to the rotating rod 504. A dial 505 is fixedly connected inside the housing 501. A pointer 502 is fixedly connected to one end of the rotating rod 504 and cooperates with the dial 505 to display the temperature. When the temperature changes, the bimetallic strip 503 bends, causing the rotating rod 504 to rotate. The rotating rod 504 then drives the pointer 502 to rotate. The pointer 502, in cooperation with the dial 505, visually displays the temperature, thus achieving temperature detection.

[0030] In this embodiment, a terminal block 506 is fixedly connected to the dial 505, the pointer 502 is a conductive material component, and the rotating rod 504 is an insulating material component. The terminal block 506 and the pointer 502 are respectively connected to the diesel drive unit control system through shielded cables. When the pointer 502 contacts the terminal block 506, the circuit is activated to realize temperature alarm. When the temperature rises to a certain level, the pointer 502 will rotate to contact the terminal block 506 to activate the circuit and transmit the signal to the diesel drive unit control system, thereby realizing alarm at the high temperature threshold and improving safety.

[0031] In this embodiment, the strain gauge 403 is electrically connected to the diesel drive unit control system via a shielded cable. The shielded cable reduces electromagnetic interference and ensures the stability of signal transmission.

[0032] In this embodiment, strain gauges 403 are fixedly connected to both sides of the metal elastic sheet 402. Insulation is performed between strain gauges 403 and the metal elastic sheet 402. When the metal elastic sheet 402 deforms, the inner strain gauge 403 compresses and its resistance decreases, while the outer strain gauge 403 stretches and its resistance increases. The current passing through the two strain gauges 403 remains constant. Therefore, the voltage across the outer strain gauge 403 increases, while the voltage across the inner strain gauge 403 decreases. The diesel drive unit control system judges the pressure condition of the diaphragm cylinder 401 based on the magnitude of the output voltage difference, thereby realizing pressure detection.

[0033] In this embodiment, the housing 501 is made of polyetheretherketone material, which has excellent insulation properties, high temperature resistance and corrosion resistance, making it suitable for harsh environments, improving the durability and reliability of the housing 501, and having a light transmittance of over 80%, making it easy to observe the state of the components inside the housing 501, and convenient to observe the position of the pointer 502 pointing to the dial 505 to determine the temperature.

[0034] In this embodiment, the bimetallic strip 503 is spiral-shaped and is made of two metals with different coefficients of thermal expansion, nickel-based alloy and copper, by welding or rolling. When the temperature changes, the spiral bimetallic strip 503 will bend due to the two metals with different coefficients of thermal expansion, thereby driving the rotating rod 504 to rotate.

[0035] How to use and how to work this device:

[0036] When using the device, first connect one end of the connecting cavity 100 to the target detection part of the diesel drive unit and ensure sealing. Then, tighten the connecting cavity 100, diaphragm 300 and mechanical cavity 200 with bolts to form a pressure transmission channel.

[0037] When the diesel-driven unit is running, the internal pressure is transmitted to the diaphragm 300 through the connecting cavity 100. The diaphragm 300 pushes the diaphragm cylinder 401 to move. The diaphragm cylinder 401 moves and acts on the metal elastic sheet 402, causing the metal elastic sheet 402 to deform. The strain gauges 403 on both sides of the metal elastic sheet 402 generate resistance changes due to compression or stretching, and transmit the voltage difference signal of the strain gauges 403 to the control system to calculate the pressure value and realize pressure detection.

[0038] While detecting pressure, the temperature change of the diesel drive unit is transmitted to the housing 501 through the connecting cavity 100. The spiral bimetallic strip 503 inside the housing 501 bends due to the difference in thermal expansion coefficients, which in turn drives the rotating rod 504 to rotate. The pointer 502 on the rotating rod 504 rotates with the deformation of the bimetallic strip 503, and the temperature value is displayed intuitively through the dial 505. When the pointer 502 touches the terminal 506, it indicates that the temperature has reached the set threshold, the circuit is turned on, the control system receives the alarm signal, and triggers the audible and visual alarm or automatic shutdown protection.

[0039] In summary, integrating temperature and pressure detection overcomes the shortcomings of traditional instruments, reduces the complexity of installation and maintenance, and ensures safe operation of the equipment and improves its stability and reliability through accurate detection of temperature and pressure in diesel-driven units.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A temperature and pressure detection device for a diesel-driven generator set, characterized in that: It includes a connecting cavity (100) and a mechanical cavity (200). One end of the connecting cavity (100) is connected to a diesel drive unit. A diaphragm (300) is provided between the connecting cavity (100) and the mechanical cavity (200). The connecting cavity (100), the mechanical cavity (200) and the diaphragm (300) are locked together by bolts. A pressure detection mechanism (400) and a temperature detection mechanism (500) are installed on the mechanical cavity (200). The pressure detection mechanism (400) includes a diaphragm cylinder (401) fixedly connected to the diaphragm sheet (300), a metal elastic sheet (402) fixedly connected between the diaphragm cylinder (401) and the housing (501), and a strain gauge (403) installed on the metal elastic sheet (402). The temperature detection mechanism (500) includes a housing (501) fixedly connected to the mechanical cavity (200), the end of the housing (501) passing through the diaphragm cylinder (401) and entering the connecting cavity (100), and a pointer (502) and a bimetallic strip (503) are provided inside the housing (501).

2. The diesel engine unit temperature and pressure detection device according to claim 1, characterized in that: A piston (600) for sealing the diaphragm cylinder (401) is fixedly sleeved on the outer wall of the housing (501), and an O-ring seal (601) is provided between the piston (600) and the inner wall of the diaphragm cylinder (401).

3. The diesel engine unit temperature and pressure detection device according to claim 1, characterized in that: A rotating rod (504) is rotatably disposed inside the housing (501) via a sealed bearing. A bimetallic strip (503) is sleeved on the rotating rod (504) and one end of the bimetallic strip is fixedly connected to the rotating rod (504). A dial (505) is fixedly connected inside the housing (501). A pointer (502) is fixedly connected to one end of the rotating rod (504) and cooperates with the dial (505) to display the temperature.

4. The diesel engine unit temperature and pressure detection device according to claim 3, characterized in that: A terminal block (506) is fixedly connected to the dial (505). The pointer (502) is made of conductive material, and the rotating rod (504) is made of insulating material. The terminal block (506) and the pointer (502) are connected to the diesel engine control system via shielded cables. When the pointer (502) contacts the terminal block (506), the circuit is activated to achieve a temperature alarm.

5. The diesel engine unit temperature and pressure detection device according to claim 1, characterized in that: The strain gauge (403) is electrically connected to the diesel drive unit control system via a shielded cable.

6. The diesel engine unit temperature and pressure detection device according to claim 1, characterized in that: The strain gauge (403) is fixedly connected to both sides of the metal elastic sheet (402), and the strain gauge (403) and the metal elastic sheet (402) are insulated from each other.

7. The diesel engine unit temperature and pressure detection device according to claim 1, characterized in that: The housing (501) is a polyetheretherketone (PEEK) material component.

8. The diesel engine unit temperature and pressure detection device according to claim 1, characterized in that: The bimetallic sheet (503) is spiral-shaped and is made of two metals with different coefficients of thermal expansion, nickel-based alloy and copper, by welding or rolling.

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