Common rail unit heat tracing pipe testing device
By designing a common rail unit heat tracing tube test device, the sealing of the heat tracing tube is detected by high-pressure air, the problem of leakage of heat tracing tubes in the ship's low-speed diesel main engine is solved, and efficient detection and stable operation are achieved.
Patent Information
- Application Number
- CN202421511776.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In the low-speed diesel main engine of the ship, the heat tracing pipe is prone to leakage and welding defects during the installation process, resulting in water leakage in the heat tracing system and affecting use.
A common rail unit heat tracing tube testing device is designed, and high-pressure air is input into the heat tracing tube using an air compressor. The pressure display instrument is used to detect the pressure in real time, automatically shut down and close the shutdown ball valve, keep it in a sealed state for 15 minutes, and observe the pressure changes to judge leakage.
The device can efficiently detect the sealing of the heat-tracing pipe, solve the leakage problem, improve the assembly efficiency and stable operation of the diesel host, and ensure product quality and customer satisfaction.
Smart Images
Figure CN222812531U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of common rail units for low-speed diesel engines, in particular to a common rail unit heating pipe testing device. Background Art
[0002] The energy of the ship's low-speed diesel main engine comes from the heavy oil in the fuel system. In order to ensure that the heavy oil does not condense in an external low-temperature environment, the heavy oil pipeline needs to be heated. At present, the fuel heating method in the common rail unit designed by WINGD is mostly steam heating. The steam heating system of the common rail unit usually includes a heating pipe and an external main engine. The external main engine inputs the heating steam with a heating temperature of 120°C into the heating pipe. The steam keeps the heavy oil warm during the flow in the heating pipe to prevent the heavy oil from condensing and the condensed water from flowing back into the external main engine. During the installation process, the heating pipe is limited by manual assembly and material defects, and occasionally there will be leakage in the heating pipe path. There have also been welding defects at the welding point, which leads to water and air leakage in the heating system during the operation of the ship, affecting the use of the heating system. In order to eliminate such problems and ensure the life of the ship's main engine, it is necessary to make a complete set of detection devices for the installed heating pipes. Utility Model Content
[0003] The utility model provides a common rail unit heating pipe testing device, which solves the problem of water and air leakage in the heating system due to the limitation of manual assembly and material defects proposed in the above background technology.
[0004] The utility model provides the following technical solution: a common rail unit heating pipe testing device, comprising an air compressor and a sealing plug, the air outlet end of the air compressor is connected to a connecting hose, the other end of the connecting hose is connected to a cut-off ball valve through an air inlet interface, the air outlet end of the cut-off ball valve is connected to the output end of the common rail unit heating pipe, and a pressure display instrument is provided on the air outlet end of the cut-off ball valve, and the sealing plug seals the air inlet end of the common rail unit heating pipe;
[0005] The air compressor inputs compressed air into the common rail unit heating pipe, and the pressure display instrument detects the air pressure in the common rail unit heating pipe in real time. After the air pressure in the common rail unit heating pipe reaches a preset value of 18 bar, the air compressor automatically stops, the stop ball valve automatically closes, the inside of the common rail unit heating pipe is in a sealed state, and the pressure is maintained for 15 minutes. The pressure display instrument is observed to see if there is a pressure drop, so as to determine whether the common rail unit heating pipe has a leak.
[0006] Preferably, the exhaust pressure of the air compressor is 18 bar, and the air compressor has a pressure self-stop function.
[0007] Preferably, the common rail unit heating pipe comprises a heating square pipe, a heating steel pipe and a connecting pipe, the heating square pipe and the heating steel pipe are connected in series through the connecting pipe, and two adjacent heating square pipes are in a series state, the heating square pipe is arranged on both sides of the common rail unit fuel pipe, the heating steel pipe is arranged around the lower fuel discharge pipe of the common rail unit, and the end of the heating square pipe away from the connecting pipe is the air inlet end of the common rail unit heating pipe, and the end of the heating steel pipe away from the connecting pipe is the output end of the common rail unit heating pipe.
[0008] Preferably, the stop ball valve automatically closes when the compressed air pressure reaches 18 bar, and the closing time is 15 minutes.
[0009] Compared with the prior art, the utility model has the following beneficial effects:
[0010] 1. The common rail unit heating pipe test device uses compressed air to detect the sealing of the common rail unit heating pipe. It has high test efficiency and is easy to use. No additional protection or anti-corrosion treatment is required after the test. It can fully meet customer requirements. It will completely solve the leakage problem in ship low-speed diesel engine factories and ships, improve the assembly efficiency of ship low-speed diesel engines, and ensure the stable operation of ship low-speed diesel engines.
[0011] 2. The common rail unit heating pipe testing device can improve product quality, ensure the stable quality of ship main engines in ship low-speed diesel main engine factories and ship operations, and completely prevent the problem of returning heating pipes for repair at customers after shipment, so that customers can rest assured and themselves can feel at ease. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the working principle of the structure of the utility model;
[0013] Figure 2 This is a schematic diagram of the connection between the structural sealing plug of the utility model and the heating steel pipe;
[0014] Figure 3 It is a schematic diagram of the structure and use of the utility model;
[0015] Figure 4 A schematic diagram of a style of the structural heating square tube of the utility model;
[0016] Figure 5 A schematic diagram of a style of the structural heating steel pipe of the utility model;
[0017] Figure 6 A schematic diagram of a type of structural connecting pipe of the utility model;
[0018] Figure 7 for Figure 4 Schematic diagram from left side;
[0019] Figure 8 for Figure 5 Schematic diagram from top view.
[0020] In the figure: 1. Heating square tube; 2. Heating steel pipe; 3. Connecting pipe; 4. Sealing plug; 5. Pressure display instrument; 6. Air inlet interface; 7. Stop ball valve; 8. Air compressor; 9. Common rail unit fuel pipe; 10. Connecting hose. DETAILED DESCRIPTION
[0021] 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.
[0022] The utility model provides a common rail unit heating pipe testing device, as shown in the attached manual Figure 1 To Attachment Figure 3 As shown, the testing device comprises a connecting hose 10 , a sealing plug 4 , a pressure display instrument 5 , an air inlet interface 6 , a stop ball valve 7 and an air compressor 8 .
[0023] The exhaust pressure of the air compressor 8 is preset to 18 bar. The air compressor has a pressure self-stop function. The air outlet end of the air compressor 8 is connected to a connecting hose 10. The other end of the connecting hose 10 is connected to a shut-off ball valve 7 through an air inlet interface 6. The shut-off ball valve 7 automatically closes when the compressed air pressure reaches 18 bar, and the closing time is 15 minutes.
[0024] The air outlet end of the stop ball valve 7 is connected to the output end of the common rail unit heating pipe, and a pressure display instrument 5 is provided on the air outlet end of the stop ball valve 7. Through the setting of the pressure display instrument 5, the air pressure cavity flowing in the common rail unit heating pipe can be detected in real time. When the air pressure reaches the preset value of 18 bar, the air compressor 8 stops working and the stop ball valve 7 is automatically closed.
[0025] The sealing plug 4 is connected to the air inlet end of the common rail unit heating pipe, and the sealing plug 4 can seal the air inlet end of the common rail unit heating pipe. When the stop ball valve 7 is closed, the stop ball valve 7 and the sealing plug 4 are used together to make the common rail unit heating pipe in a sealed state. The staff can judge whether the pressure in the common rail unit heating pipe drops by observing the pressure display instrument 5, and then judge whether the common rail unit heating pipe leaks. If the common rail unit heating pipe leaks, the common rail unit heating pipe needs to be retested after repair.
[0026] The common rail unit heating pipe includes a heating square pipe 1, a heating steel pipe 2 and a connecting pipe 3. The heating square pipe 1 and the heating steel pipe 2 are connected in series through the connecting pipe 3. Two adjacent heating square pipes 1 are in a series state. The heating square pipe is arranged on both sides of the common rail unit fuel pipe 9. The heating steel pipe 2 is arranged around the lower fuel discharge pipe of the common rail unit. The end of the heating square pipe 1 away from the connecting pipe 3 is the air inlet end of the common rail unit heating pipe, and the end of the heating steel pipe 2 away from the connecting pipe 3 is the output end of the common rail unit heating pipe.
[0027] From the above description, it can be seen that the test device uses high-pressure compressed air to test the integrity of the common rail unit heating pipe. The tested heating system will completely solve the leakage problem in the ship's low-speed diesel engine factory and ship use. Improve the assembly efficiency of the ship's low-speed diesel engine and ensure the stable operation of the ship's low-speed diesel engine.
[0028] The connecting hose 10 can be made of a high-pressure resistant corrugated pipe, the connecting pipe 3 can be made of a rubber hose, the stop ball valve 7, the pressure display instrument 5, the sealing plug 4, the heating square pipe 1, the heating steel pipe 2 and the connecting pipe 3 are all standard parts in the prior art and are not described in detail here. The style of the heating square pipe 1 can be as shown in the attached manual. Figure 4 As shown, the style of the heating steel pipe 2 can be as shown in the attached manual. Figure 5 As shown, the style of the connecting pipe 3 can be as shown in the attached manual Figure 6 shown.
[0029] The electrical components involved in this application are all prior art, and technicians in this field are familiar with their connection methods. Through these technicians, all the electrical components in this application are connected to their compatible power supplies through wires, and according to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed in a sequential working order, and the detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no further explanation of the electrical control is given.
[0030] In summary: when the common rail unit heating pipe test device is used, the heating square pipe 1, the heating steel pipe 2 and the connecting pipe 3 are connected in series to form a common rail unit heating pipe, the outlet end of the stop valve 7 is connected to the output end of the common rail unit heating pipe, the sealing plug 4 is connected to the air inlet end of the common rail unit heating pipe, and the sealing plug 4 seals the air inlet end of the common rail unit heating pipe. The air compressor 8 discharges the compressed air with a preset value of 18 bar into the inner cavity of the common rail unit heating pipe through the connecting hose 10, and the pressure display instrument 5 detects the air pressure in the common rail unit heating pipe in real time. After the air pressure in the common rail unit heating pipe reaches the preset value of 18 bar, the air compressor 8 automatically stops, and the stop ball valve 7 automatically closes. Under the cooperation of the stop ball valve 7 and the sealing plug 4, the interior of the common rail unit heating pipe is in a sealed state, and the pressure is maintained for 15 minutes. Observe whether the pressure display instrument 5 has a pressure drop, so as to judge whether the common rail unit heating pipe has a leak. In addition, the common rail unit heat tracing pipe needs to be retested after each repair and leakage, which completely solves the problem of leakage in the ship's low-speed diesel engine factory and ship use. It improves the assembly efficiency of the ship's low-speed diesel engine and ensures the stable operation of the ship's low-speed diesel engine.
[0031] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.
Claims
1. A common rail unit heating pipe testing device, comprising an air compressor (8) and a sealing plug (4), characterized in that: The air outlet end of the air compressor (8) is connected to a connecting hose (10), the other end of the connecting hose (10) is connected to a stop ball valve (7) via an air inlet interface (6), the air outlet end of the stop ball valve (7) is connected to the output end of the common rail unit heating pipe, and a pressure display instrument (5) is provided on the air outlet end of the stop ball valve (7), and the sealing plug (4) seals the air inlet end of the common rail unit heating pipe; The air compressor (8) inputs compressed air into the common rail unit heating pipe, and the pressure display instrument (5) detects the air pressure in the common rail unit heating pipe in real time. After the air pressure in the common rail unit heating pipe reaches a preset value of 18 bar, the air compressor (8) automatically stops, the stop ball valve (7) automatically closes, and the interior of the common rail unit heating pipe is in a sealed state. The pressure is maintained for 15 minutes, and the pressure display instrument (5) is observed to see whether there is a pressure drop to determine whether the common rail unit heating pipe is leaking.
2. A common rail unit heating pipe testing device according to claim 1, characterized in that: The exhaust pressure of the air compressor (8) is 18 bar, and the air compressor (8) has a pressure self-stop function.
3. A common rail unit heating pipe testing device according to claim 1, characterized in that: The common rail unit heating pipe comprises a heating square pipe (1), a heating steel pipe (2) and a connecting pipe (3); the heating square pipe (1) and the heating steel pipe (2) are connected in series via the connecting pipe (3); two adjacent heating square pipes (1) are in a series connection state; the heating square pipe is arranged on both sides of a common rail unit fuel pipe (9); the heating steel pipe (2) is arranged around a fuel discharge pipe at the bottom of the common rail unit; and the end of the heating square pipe (1) away from the connecting pipe (3) is an air inlet end of the common rail unit heating pipe; and the end of the heating steel pipe (2) away from the connecting pipe (3) is an output end of the common rail unit heating pipe.
4. A common rail unit heating pipe testing device according to claim 1, characterized in that: The stop ball valve (7) automatically closes when the compressed air pressure reaches 18 bar, and the closing time is 15 minutes.