KWD coupling air tightness detection device

Abstract

The utility model provides a KWD coupling air tightness detection device, which comprises a vacuum generator and a digital display pressure switch, the vacuum generator is provided with an air supply port, an exhaust port and a vacuum port, the air supply port is provided with an air supply pipeline used for being connected with an air compressor, the vacuum port is connected with a vacuumizing pipeline, and the digital display pressure switch is connected with the air supply pipeline. An airtight pressure cover used for sealing the coupling is arranged at the tail end of the vacuumizing pipeline, an air filter and a connector are arranged on the vacuumizing pipeline, and the connector is provided with a pipeline connected to a digital display pressure switch. The device is simple in structure and reasonable in design, adopts negative pressure detection, and has the advantages of being safe, reliable and convenient to operate compared with inert gas injection detection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of urban rail transit vehicle maintenance, in particular to a KWD coupling gas tightness detection device. BACKGROUND

[0002] Urban rail transit vehicles will be overhauled or repaired after running for a certain period of time or a certain number of kilometers. The vehicle traction transmission system is one of the most important maintenance links in the overhaul and repair. The main equipment of the traction transmission system includes a traction motor, a coupling and a gear box. The coupling is a key component connecting the traction motor and the gear box. Good overhaul and repair of the coupling is one of the necessary conditions for restoring the vehicle traction transmission performance to the level of a new vehicle.

[0003] The existing coupling maintenance process mainly focuses on cleaning, visual inspection and replacement of essential parts. However, the state of components such as metal bellows, 1# sealing ring and 2# sealing ring inside the coupling cannot be observed. During actual operation, there is a phenomenon of oil leakage from the coupling when the vehicle is in static adjustment after being overhauled. In order to ensure the quality of the overhaul, the vehicle is overhauled again, and the faulty coupling is replaced. Upon analysis of the faulty coupling, it is found that the oil stain comes from the bottom, indicating that the sealing of the coupling itself is problematic, resulting in oil leakage. Therefore, detecting the sealing performance of the coupling during the overhaul and repair can help determine whether the coupling is in good condition, avoiding the assembly of unqualified couplings on the vehicle and the subsequent rework, disassembly and reconnection of the train. SUMMARY

[0004] In view of the above-mentioned deficiencies of the prior art, the utility model provides a KWD coupling gas tightness detection device, which uses the pressure difference between the gas inside and outside the container to check for leaks, effectively avoiding the rework of the train after the connection is completed due to oil leakage from the coupling, improving the efficiency of the train overhaul and repair, and ensuring the quality of the train maintenance.

[0005] The utility model provides a technical scheme: a KWD coupling gas tightness detection device, comprising a vacuum generator and a digital pressure switch, a gas inlet, an exhaust port and a vacuum port are arranged on the vacuum generator, the gas inlet is provided with a gas supply pipeline connected with an air compressor, the vacuum port is connected with a vacuum pipeline, the end of the vacuum pipeline is provided with a gas tight pressure cover for sealing the coupling, an air filter and a connector are arranged on the vacuum pipeline, and the connector is provided with a pipeline connected to the digital pressure switch.

[0006] Further, a gas supply valve and a pressure regulating valve are arranged on the gas supply pipeline, and the gas supply valve is connected with the gas inlet of the vacuum generator.

[0007] Further, the vacuum generator, digital display pressure switch, air supply pipeline and vacuum pipeline are installed in the box body, and a switching power supply and a relay connected with the switching power supply are further arranged in the box body, and the switching power supply is used for supplying power to each electrical element.

[0008] Further, the box body is provided with a buzzer, and the buzzer, vacuum generator and digital display pressure switch are connected with the relay respectively.

[0009] Further, the box body is provided with a box cover which is opened by a flip, and the digital display pressure switch is arranged on the box cover, and the box cover is provided with a vacuum pumping self-resetting button, a vacuum breaking self-resetting button and a vacuum leakage self-locking button.

[0010] Further, the box cover is further provided with a plug for external power supply.

[0011] Further, the exhaust port is provided with a silencer.

[0012] Further, the air-tight pressure cover is buckled on the shaft end of the coupling to seal the coupling.

[0013] The beneficial effects of the utility model are as follows:

[0014] (1) The utility model adopts negative pressure detection, compared with inert gas detection, has a series of advantages such as safe and reliable, convenient operation, simple structure, low cost and the like.

[0015] (2) The utility model realizes the sealing performance test of the coupling, and the test result can be used as the basis for judging whether the sealing ring in the coupling is installed in place and whether the metal bellows, sealing ring and the like are damaged.

[0016] (3) The sealing performance test of the coupling of the utility model can effectively avoid that the train is re-disassembled and reworked due to oil leakage of the coupling after being connected, and seriously affects the progress of normal operation.

[0017] (4) After the utility model is put into use and the air tightness of the coupling is detected to be qualified, it can be guaranteed that the coupling installed on the traction motor will not have oil leakage failure, avoids the waste of artificial and equipment working hours, improves the train frame, overhauling work efficiency and guarantees the maintenance quality of train equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of the utility model;

[0019] Figure 2 It is the circuit principle diagram of the utility model;

[0020] Figure 3 It is the structure schematic diagram of the coupling;

[0021] In the figure: 1 - vacuum generator, 2 - digital pressure switch, 3 - air supply pipeline, 4 - vacuum pipeline, 5 - airtight pressure cover, 6 - air filter, 7 - connector, 8 - air supply valve, 9 - pressure regulating valve, 10 - box, 11 - switching power supply, 12 - relay, 13 - buzzer, 14 - box cover, 15 - vacuum self-resetting button, 16 - vacuum breaking self-resetting button, 17 - vacuum leakage self-locking button, 18 - plug, 19 - silencer. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with specific embodiments, wherein, the drawings are only used for example description, and the representation is only schematic diagram, and not physical drawing, and can not be understood as the limitation of the utility model, in order to better illustrate the specific embodiment of the utility model, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of actual product, for those skilled in the art, some known structures and its description in the drawings can be omitted, all other specific embodiments obtained by the ordinary skill in the art without making creative labor based on the specific embodiment in the utility model, belong to the range of protection of the utility model.

[0023] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "front", "back", "upper", "lower" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it can not be understood as the limitation of the utility model.

[0024] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0025] As Figures 1-2The utility model discloses a kind of KWD coupling air-tightness detection devices, including vacuum generator 1 and digital pressure switch 2, vacuum generator 1 is provided with air supply port, exhaust port and vacuum port, the air supply port is provided with air supply pipeline 3 for being connected with air compressor, the vacuum port is connected with vacuum pipeline 4, the end of vacuum pipeline 4 is provided with air-tight pressure cover 5 for sealing coupling, air filter 6 and connecting head 7 are provided on vacuum pipeline 4, the connecting head 7 is provided with pipeline connection to digital pressure switch 2.

[0026] Air supply valve 8 and pressure regulating valve 9 are provided on air supply pipeline 3, and the air supply valve 8 is connected with the air supply port of the vacuum generator 1.

[0027] The vacuum generator 1, the digital pressure switch 2, the air supply pipeline 3 and the vacuum pipeline 4 are installed in the box body 10, and the box body 10 is also provided with a switching power supply 11 and a relay 12 connected with the switching power supply 11, and the switching power supply 11 is used to supply power to each electrical element.

[0028] The box body 10 is provided with a buzzer 13, and the buzzer 13, the vacuum generator 1 and the digital pressure switch 2 are respectively connected with the relay 12.

[0029] The box body 10 is provided with a flip cover 14, and the digital pressure switch 2 is arranged on the box cover 14, and the box cover 14 is provided with a vacuum self-resetting button 15, a vacuum breaking self-resetting button 16 and a vacuum leakage self-locking button 17, and the vacuum leakage self-locking button 17 is provided with a display lamp.

[0030] The box cover 14 is also provided with a plug 18 for external power supply, and the exhaust port is provided with a silencer 19. The air-tight pressure cover 5 is buckled on the shaft end of the coupling to seal the coupling.

[0031] In actual use, after the coupling is repaired and the O-ring is replaced, the shaft end of the coupling is sealed by the air-tight pressure cover 5 of the device, and the inside of the coupling is a relatively closed space at this time. The pressure cover with the interface is connected with the air pressure pipe, and the other end is connected with the digital pressure switch 2, and the vacuum pipeline 4, the air filter 6 and the vacuum generator 1 are connected, so as to form a closed loop air path. The inside air of the coupling is extracted by the vacuum generator 1, so that the negative pressure is formed in the cavity, and the air pressure change is detected by the digital pressure switch 2, so as to determine the sealing performance of the coupling. According to a large amount of test data, the determination standard is as shown in table 1:

[0032] Table 1 Air-tightness detection device determination standard

[0033] Negative pressure (lower than standard atmospheric pressure) 0.4 bar Test time 2 minutes Pressure change ≤ 0.02 bar

[0034] If the pressure changes significantly, the buzzer 13 alarms, indicating that the coupling is not air-tight and has a leak. If the pressure changes less than 0.02 bar in 2 minutes, the coupling meets the air-tightness requirement.

[0035] The utility model discloses: (1) can avoid rework time-consuming: once vehicle reassembles, involves three team frame vehicle coordinated operation, time-consuming two workday, seriously influence normal operation's progress, (2) improve work efficiency: guarantee installation to the coupling on traction motor does not happen oil leakage failure, avoid artificial working hour and equipment working hour's waste, (3) guarantee the maintenance quality: effectively avoid the coupling gear because of the coupling oil leakage and cause the coupling gear to produce violent wear, and then lead to the coupling damage.

[0036] Finally, it should be noted that: the above only for the preferred embodiments of the utility model have, and do not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A KWD coupling air tightness detection device, characterized in that, Including vacuum generator (1) and digital pressure switch (2), the vacuum generator (1) is provided with air supply port, exhaust port and vacuum port, the air supply port is provided with air supply pipeline (3) for connecting with air compressor, the vacuum port is connected with vacuum pipeline (4), the end of vacuum pipeline (4) is provided with air-tight pressure cover (5) for sealing coupling, the vacuum pipeline (4) is provided with air filter (6) and connecting head (7), the connecting head (7) is provided with pipeline connection to digital pressure switch (2).

2. The KWD coupling air tightness detection device according to claim 1, characterized in that, The air supply pipeline (3) is provided with air supply valve (8) and pressure regulating valve (9), the air supply valve (8) is connected with the air supply port of vacuum generator (1).

3. The KWD coupling air tightness detection device according to claim 2, characterized in that, The vacuum generator (1), digital pressure switch (2), air supply pipeline (3) and vacuum pipeline (4) are installed in the box (10), the box (10) is further provided with switching power supply (11) and relay (12) connected with switching power supply (11), and the switching power supply (11) is used for power supply for each electrical element.

4. The KWD coupling air tightness detection device according to claim 3, characterized in that, The box (10) is provided with buzzer (13), and the buzzer (13), vacuum generator (1) and digital pressure switch (2) are connected with relay (12) respectively.

5. The KWD coupling air tightness detection device according to claim 3, wherein, The box (10) is provided with box cover (14) opened by turning over, and the digital pressure switch (2) is arranged on the box cover (14), the box cover (14) is provided with vacuum self-resetting button (15), vacuum breaking self-resetting button (16) and vacuum leakage self-locking button (17).

6. The KWD coupling air tightness detection device according to claim 5, wherein, The box cover (14) is further provided with plug (18) for external power supply.

7. The KWD coupling air tightness detection device according to claim 1, wherein, The exhaust port is provided with silencer (19).

8. The KWD coupling air tightness detection device of claim 1, wherein, The air-tight pressure cover (5) is buckled on the shaft end of coupling to seal the coupling.

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