Device for testing air tightness of motor train unit split type air conditioner with nitrogen

Abstract

The utility model relates to high -speed train air conditioning refrigeration pipeline air tightness test technical field discloses convenient to overhaul motor train unit split type air conditioner air tightness nitrogen gas testing device, including industrial nitrogen generation device and high pressure solenoid valve, the top of industrial nitrogen generation device is fixedly connected with industrial air increasing machine through the pipeline, the output of industrial air increasing machine is fixedly connected with the connecting pipe, the top side fixed connection of connecting pipe has the dismounting mechanism, the inside slide connection of dismounting mechanism has pressure transmitter, the right -hand member fixed connection of connecting pipe has pressure buffer tank. In the utility model, through the connection ring and the pressure transmitter fixed in it put into the fixed ring, loosen the connecting column, spring one releases the elastic potential energy and pushes the connecting column reset, drives the limit board reverse sliding, clamps into the both sides of connection ring, completes the fixation of pressure transmitter, and then improves the efficiency when maintaining.

Description

Technical Field

[0001] This utility model relates to the field of air tightness testing technology for air conditioning refrigeration pipelines in high-speed trains, and in particular to a nitrogen gas testing device for the air tightness of split-type air conditioning systems in high-speed trains, which is convenient for maintenance. Background Technology

[0002] A split-type air conditioning system in a high-speed train refers to an air conditioning system in which different components are installed in different locations on the train. The nitrogen gas testing device for the airtightness of a split-type air conditioning system in a high-speed train is used to test the airtightness of this system. Because split-type air conditioning systems have long pipes and many joints, refrigerant leaks are prone to occur. Refrigerant leaks can affect the cooling and heating performance of the air conditioner and may even damage the environment and equipment; therefore, airtightness testing is necessary.

[0003] Before starting the airtightness test, a comprehensive inspection of the entire air conditioning system is required. Next, all inlet and outlet valves of the air conditioning system are closed to ensure that air does not leak from non-test areas during the test. Then, compressed air is injected into the air conditioning pipeline to the predetermined pressure value using existing air supply equipment within the station section. After reaching the set pressure, the air supply is stopped, and pressure changes are observed over a period of time.

[0004] In existing technologies, when performing nitrogen gas tightness tests on the airtightness of split-type air conditioners in some high-speed trains, the pressure transmitters need to be repaired using bolts and tools. The bolts need to be tightened or loosened one by one using wrenches, screwdrivers, and other tools, which reduces the efficiency of disassembly and repair. Therefore, in order to address the above shortcomings, a device for nitrogen gas tightness testing of split-type air conditioners in high-speed trains is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a nitrogen testing device for the airtightness of the split air conditioning system in high-speed trains, which is convenient for maintenance. It aims to improve the problem that some pressure transmitters in the prior art require the use of threaded tools during maintenance and disassembly, which is complicated, time-consuming and labor-intensive.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A nitrogen testing device for the airtightness of a split-type air conditioning system in a high-speed train is provided for easy maintenance. It includes an industrial nitrogen generator and a high-pressure solenoid valve. An industrial air booster is fixedly connected to the top of the industrial nitrogen generator via a pipe. A connecting pipe is fixedly connected to the output end of the industrial air booster. A disassembly / assembly mechanism is fixedly connected to the top side of the connecting pipe. A pressure transmitter is slidably connected inside the disassembly / assembly mechanism. A pressure buffer tank is fixedly connected to the right end of the connecting pipe. A protective mechanism is fixedly connected to the right end of the pressure buffer tank via a connecting pipe. The disassembly / assembly mechanism includes a fixing ring. The bottom side of the fixing ring is fixedly connected to the top side of the connecting pipe. A reset assembly is slidably connected inside the fixing ring. Transmission plates are fixedly connected to both ends of the reset assembly. Connecting posts are fixedly connected to adjacent sides of the two transmission plates. Limit plates are slidably connected to both ends of the fixing ring. A connecting ring is slidably connected inside the fixing ring.

[0008] As a further description of the above technical solution:

[0009] The reset assembly includes a connecting post, the outside of which is slidably connected to the inside of the fixing ring, two sliding rings are fixedly connected to the top side of the connecting post, and multiple springs are fixedly connected to the bottom side of the connecting post.

[0010] As a further description of the above technical solution:

[0011] The limiting plate has an inclined opening inside, and the connecting column is slidably connected to the inside of the inclined opening.

[0012] As a further description of the above technical solution:

[0013] The pressure transmitter is externally fixedly connected to the inside of the connecting ring, and externally slidably connected to the inside of the connecting pipe;

[0014] As a further description of the above technical solution:

[0015] The high-pressure solenoid valve is externally fixedly connected to the inside of the left end of the connecting pipe, and the two limiting plates are externally slidably connected to the inside of the left and right ends of the connecting ring, respectively.

[0016] As a further description of the above technical solution:

[0017] The bottom ends of multiple springs are fixedly connected to the bottom side of the inner wall of the fixed ring, and the outside of the transmission plate is slidably connected to the inside of the limiting plate;

[0018] As a further description of the above technical solution:

[0019] The protective mechanism includes a support ring, the outside of which is fixedly connected to the inside of the connecting tube. Multiple sliding rods are slidably connected inside the support ring. Springs are sleeved on the outside of each sliding rod. A limit plate is fixedly connected to the left side of each sliding rod. A connecting ring is fixedly connected to the right side of each sliding rod. A sealing plate is fixedly connected inside the connecting ring.

[0020] As a further description of the above technical solution:

[0021] The outer side of the sealing disc is in contact with the inner side of the support ring. The left end of the second spring is fixedly connected to the right side of the limiting disc, and the right ends of the multiple second springs are fixedly connected to the left side of the support ring.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the pressure transmitter is placed into the fixing ring by connecting the ring and fixing it. The connecting column is loosened, and the spring releases its elastic potential energy to push the connecting column to reset, causing the limiting plate to slide in the opposite direction and lock into both sides of the connecting ring, thus completing the fixing of the pressure transmitter and improving the efficiency of maintenance.

[0024] 2. In this utility model, by driving the limiting plate to slide and squeeze the second spring, the second spring can store elastic potential energy, and then reset based on a force in the opposite direction of the sealing plate. When the high-pressure solenoid valve is closed, the second spring pushes the sealing plate to fit tightly with the support ring, thereby achieving air circuit sealing and preventing gas backflow. Attached Figure Description

[0025] Figure 1 This is a perspective view of the nitrogen gas testing device for the airtightness of the split-type air conditioning system in high-speed trains, which is convenient for maintenance according to this utility model.

[0026] Figure 2 This is a schematic diagram of the fixing ring of the nitrogen gas testing device for the air tightness of the split air conditioning system of a high-speed train, which is convenient for maintenance according to this utility model.

[0027] Figure 3 This is a schematic diagram of the connecting ring of the nitrogen gas testing device for the airtightness of the split air conditioning system of a high-speed train, which is convenient for maintenance according to this utility model.

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5 This is a schematic diagram of the limiting plate of the nitrogen gas testing device for the air tightness of the split air conditioning system of a high-speed train, which is convenient for maintenance according to this utility model.

[0030] Figure 6This is a schematic diagram of the sealing disc of the nitrogen gas testing device for the airtightness of the split-type air conditioning system in high-speed trains, which is convenient for maintenance according to this utility model.

[0031] Legend:

[0032] 1. Industrial nitrogen generator; 2. Industrial air booster; 3. Connecting pipe; 4. Pressure transmitter; 5. Disassembly and assembly mechanism; 51. Fixing ring; 52. Reset assembly; 521. Connecting column; 522. Sliding ring; 523. Spring 1; 53. Transmission plate; 54. Connecting column; 55. Limiting plate; 56. Inclined opening; 57. Connecting ring; 6. Pressure buffer tank; 7. Connecting pipe; 8. High-pressure solenoid valve; 9. Protective mechanism; 91. Support ring; 92. Sliding rod; 93. Spring 2; 94. Limiting plate; 95. Connecting ring; 96. Sealing plate. Detailed Implementation

[0033] 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.

[0034] Reference Figures 1 to 3 This utility model provides an embodiment of a nitrogen gas testing device for the airtightness of a split-type air conditioning system in high-speed trains, facilitating maintenance. The device includes an industrial nitrogen generator 1 and a high-pressure solenoid valve 8. The industrial nitrogen generator serves as the gas source for the airtightness test, meeting the nitrogen requirements for airtightness testing in high-speed trains. An industrial air booster 2 is fixedly connected to the top of the industrial nitrogen generator 1 via a pipe. The industrial air booster primarily functions to pressurize the nitrogen to a stable pressure above 1.2 MPa, providing sufficient pressure reserve for subsequent airtightness testing. The booster is also equipped with overload protection and temperature monitoring functions to ensure safe operation. A connecting pipe 3 is fixedly connected to the output end of the industrial air booster 2, serving as the nitrogen transmission channel. A disassembly and assembly mechanism 5 is fixedly connected to the top side of the connecting pipe 3, facilitating maintenance and repair.

[0035] Reference Figures 2 to 4The disassembly / assembly mechanism 5 includes a fixing ring 51, the bottom of which is fixedly connected to the top of the connecting pipe 3 by welding, thus providing support for the fixing ring 51. A reset assembly 52 is slidably connected inside the fixing ring 51. The reset assembly 52 can be displaced after being pushed and returns to its initial position after the force disappears, facilitating disassembly / assembly operations. The reset assembly 52 includes a connecting post 521, the outside of which is slidably connected to the inside of the fixing ring 51. The fixing ring 51 restricts the connecting post 521, allowing it to slide vertically. Two sliding rings 522 are fixedly connected to the top of the connecting post 521 by welding, so that pushing the connecting post 521 to slide can also cause the sliding rings 522 to slide.

[0036] Multiple springs 523 are fixedly connected to the bottom side of the connecting column 521. The connecting column 521 slides downwards to compress the springs 523, allowing them to store elastic potential energy and then reset based on a force in the opposite direction of the connecting column 521. The bottom ends of the multiple springs 523 are fixedly connected to the bottom inner wall of the fixing ring 51, ensuring uniform force distribution on the springs 523. Transmission plates 53 are fixedly connected to both ends of the reset assembly 52, transmitting force and sliding together with the transmission plates 53 when the reset assembly 52 operates. Connecting columns 54 are fixedly connected to adjacent sides of the two transmission plates 53, sliding through the transmission plates 53 and then synchronously sliding the connecting columns 54. Limiting plates 55 are slidably connected to both ends of the fixing ring 51, allowing them to slide towards each other when the fixing ring 51 slides.

[0037] The transmission plate 53 is externally slidably connected to the inside of the limiting plate 55. The limiting plate 55 restricts the transmission plate 53, allowing it to slide stably. An inclined opening 56 is provided inside the limiting plate 55, providing space for movement. The connecting column 54 is externally slidably connected to the inside of the inclined opening 56. When the connecting column 54 moves with the transmission plate 53, it slides within the inclined opening 56, thereby pushing the limiting plate 55 to slide. A connecting ring 57 is slidably connected inside the fixing ring 51. The connecting ring 57 is used to install and fix the pressure transmitter 4 and can slide within the fixing ring 51, facilitating the installation and positioning of the pressure transmitter 4.

[0038] Two limiting plates 55 are slidably connected to the left and right ends of the connecting ring 57. When the limiting plates 55 slide into the connecting ring 57, they can limit or release the connection ring 57, enabling its installation and removal. The pressure transmitter 4 is externally fixedly connected to the inside of the connecting ring 57, providing a stable installation position for the pressure transmitter 4. The pressure transmitter 4 is slidably connected inside the disassembly mechanism 5, and externally slidably connected to the inside of the connecting pipe 3, facilitating its installation and replacement while allowing it to contact the nitrogen gas inside the connecting pipe 3 for accurate monitoring of nitrogen pressure. A pressure buffer tank 6 is fixedly connected to the right end of the connecting pipe 3, further stabilizing the pressure and reducing pressure fluctuations.

[0039] Reference Figure 1 , Figure 5 and Figure 6 The right end of the pressure buffer tank 6 is fixedly connected to a protective mechanism 9 via a connecting pipe 7. The protective mechanism 9 protects the gas path. The protective mechanism 9 includes a support ring 91, which is externally fixedly connected to the inside of the connecting pipe 7. The support ring 91 and the connecting pipe 7 are fixed together by welding, thus providing support for the support ring 91. A high-pressure solenoid valve 8 is externally fixedly connected to the inside of the left end of the connecting pipe 7. The high-pressure solenoid valve 8 is used to control the opening and closing of the gas path. Multiple sliding rods 92 are slidably connected inside the support ring 91, and the sliding rods 92 can slide within the support ring 91. A second spring 93 is sleeved on the outside of the sliding rods 92, and the sliding rods 92 restrict the second spring 93, ensuring that the second spring 93 is subjected to uniform force.

[0040] Multiple springs 93 are fixedly connected at their right ends to the left side of the support ring 91. This fixation ensures even force distribution on the springs 93. A limiting plate 94 is fixedly connected to the left side of the sliding rod 92, preventing it from sliding out of the support ring 91. The left end of each spring 93 is fixedly connected to the right side of the limiting plate 94. When the sliding rod 92 moves the limiting plate 94, the spring 93 is compressed or stretched, generating elastic force. A connecting ring 95 is fixedly connected to the right side of each sliding rod 92, connecting them together for synchronized movement. A sealing plate 96 is fixedly connected inside the connecting ring 95, providing a seal and ensuring the air passage is airtight. The outside of the sealing plate 96 contacts the inside of the support ring 91, ensuring its sealing effect and preventing backflow.

[0041] Working principle: The industrial nitrogen generator 1 produces nitrogen gas, and the industrial air booster 2 increases the nitrogen pressure to above 1.2 MPa through its internal boosting components. The pressurized nitrogen gas is transported through the connecting pipe 3. In the disassembly and assembly mechanism 5 on the top side of the connecting pipe 3, the fixing ring 51 is welded to the connecting pipe 3 to form a support base. When the pressure transmitter 4 needs to be installed, the connecting column 521 is pressed down, which drives the sliding ring 522 to move down, while simultaneously squeezing the multiple springs 523 at the bottom to store elastic potential energy. The transmission plates 53 on both sides of the connecting column 521 slide accordingly, and the connecting column 54 on the transmission plate 53 slides within the inclined opening 56 of the limiting plate 55, pushing the two limiting plates 55 to slide to the opposite side, making room for the installation of the connecting ring 57. Place the connecting ring 57 and the pressure transmitter 4 fixed inside it into the fixing ring 51, loosen the connecting column 521, and the spring 523 releases its elastic potential energy to push the connecting column 521 to reset, causing the limiting plate 55 to slide in the opposite direction and lock into both sides of the connecting ring 57, thus completing the fixation of the pressure transmitter 4, enabling it to monitor the nitrogen pressure in the connecting pipe 3 in real time.

[0042] The pressure buffer tank 6 is connected to the right end of the connecting pipe 3. Its internal cavity can buffer nitrogen pressure fluctuations to ensure pressure stability. The pressure buffer tank 6 is connected to the protective mechanism 9 via the connecting pipe 7. When nitrogen is being detected, nitrogen is used to push the sealing disc 96 to slide, which in turn drives multiple sliding rods 92 to slide, which in turn drives the limiting disc 94 to slide and compress the second spring 93. This allows the second spring 93 to store elastic potential energy, and then reset based on a force in the opposite direction of the sealing disc 96. When the high-pressure solenoid valve 8 is closed, the second spring 93 pushes the sealing disc 96 to fit tightly against the support ring 91, achieving a gas path seal and preventing gas backflow.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nitrogen testing device for the airtightness of a split-type air conditioning system in a high-speed train, facilitating maintenance, comprising an industrial nitrogen generator (1) and a high-pressure solenoid valve (8), characterized in that: The top of the industrial nitrogen generator (1) is fixedly connected to an industrial air booster (2) via a pipe. The output end of the industrial air booster (2) is fixedly connected to a connecting pipe (3). The top side of the connecting pipe (3) is fixedly connected to a disassembly and assembly mechanism (5). The disassembly and assembly mechanism (5) is slidably connected to a pressure transmitter (4). The right end of the connecting pipe (3) is fixedly connected to a pressure buffer tank (6). The right end of the pressure buffer tank (6) is fixedly connected to a protective mechanism (9) via a connecting pipe (7). The disassembly and assembly mechanism (5) includes a fixing ring (51), the bottom side of which is fixedly connected to the top side of the connecting pipe (3). A reset assembly (52) is slidably connected inside the fixing ring (51). A transmission plate (53) is fixedly connected to both the left and right ends of the reset assembly (52). A connecting post (54) is fixedly connected to the adjacent side of the two transmission plates (53). A limit plate (55) is slidably connected to both the left and right ends of the fixing ring (51). A connecting ring (57) is slidably connected inside the fixing ring (51).

2. The nitrogen gas testing device for the airtightness of the split-type air conditioning system in a high-speed train as described in claim 1, characterized in that: The reset assembly (52) includes a connecting post (521), the outside of which is slidably connected to the inside of the fixing ring (51), two sliding rings (522) are fixedly connected to the top side of the connecting post (521), and a plurality of springs (523) are fixedly connected to the bottom side of the connecting post (521).

3. The nitrogen gas testing device for the airtightness of the split-type air conditioning system in a high-speed train as described in claim 1, characterized in that: The limiting plate (55) has an inclined opening (56) inside, and the connecting column (54) is slidably connected to the inside of the inclined opening (56).

4. The nitrogen gas testing device for the airtightness of the split-type air conditioning system in a high-speed train as described in claim 1, characterized in that: The pressure transmitter (4) is externally fixedly connected to the inside of the connecting ring (57), and the pressure transmitter (4) is externally slidably connected to the inside of the connecting pipe (3).

5. The nitrogen gas testing device for the airtightness of the split-type air conditioning system in a high-speed train, as described in claim 2, is characterized in that: The high-pressure solenoid valve (8) is externally fixedly connected to the inside of the left end of the connecting pipe (7), and the two limiting plates (55) are externally slidably connected to the inside of the left and right ends of the connecting ring (57).

6. The nitrogen gas testing device for the airtightness of the split-type air conditioning system in a high-speed train, as described in claim 2, is characterized in that: The bottom ends of the plurality of springs (523) are fixedly connected to the bottom side of the inner wall of the fixed ring (51), and the outside of the transmission plate (53) is slidably connected to the inside of the limiting plate (55).

7. The nitrogen gas testing device for the airtightness of the split-type air conditioning system in a high-speed train as described in claim 1, characterized in that: The protective mechanism (9) includes a support ring (91), the outside of which is fixedly connected to the inside of the connecting tube (7). Multiple sliding rods (92) are slidably connected inside the support ring (91). A second spring (93) is sleeved on the outside of each sliding rod (92). A limit plate (94) is fixedly connected to the left side of each sliding rod (92). A connecting ring (95) is fixedly connected to the right side of each sliding rod (92). A sealing plate (96) is fixedly connected inside the connecting ring (95).

8. The nitrogen gas testing device for the airtightness of the split-type air conditioning system in a high-speed train as described in claim 7, characterized in that: The outside of the sealing disc (96) is in contact with the inside of the support ring (91), the left end of the second spring (93) is fixedly connected to the right side of the limiting disc (94), and the right ends of the multiple second springs (93) are fixedly connected to the left side of the support ring (91).

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