Traction converter power module pressure maintaining tool

Abstract

The utility model discloses a traction converter power module pressure maintaining tool, and relates to the technical field of pressure maintaining tools, an experiment platform is provided with a support frame, the support frame is symmetrically provided with a plurality of groups of connectors, and each group of connectors comprises an upper connector and a lower connector. One cooling water connector of the power module is connected with an upper connector, the other cooling water connector of the power module is connected with a lower connector, the connectors are communicated through a communicating pipe and are sequentially connected with an internal pipeline of the power module end to end to form a circulation pipeline, and the end of the circulation pipeline is connected with a pressure maintaining liquid filling device through a liquid inlet pipe and a liquid outlet pipe. According to the utility model, the cooling water pressure maintaining test can be independently carried out on the power module, the water inlet pipe and the water outlet pipe are connected with the external pressure maintaining liquid filling device, and the pressure maintaining liquid filling device, the power module and the communicating pipe form a whole set of closed water circulation path which is communicated with each other, so that the pressure maintaining test of set pressure can be carried out; and the water pressure can be adjusted as required, so that the standard and accuracy of the leakage test are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure-maintaining tooling, in particular to a pressure-maintaining tooling for a power module of a traction converter. Background Art

[0002] The power module of the HXD2B electric locomotive traction converter is a special accessory for railway locomotives, mainly composed of a water-cooled base plate, a high-power IGBT switch element, a control board, a busbar, a frame, etc. When inspecting the power module, it is necessary to perform a pressure test on the cooling water interface between the power module and the traction converter, as well as the sealing of the internal pipe system of the power module, and it is required that there should be no leakage in each cooling water system.

[0003] However, under the current conditions, since the cooling water system of the traction converter of this type of locomotive is open (connected to the atmosphere through an expansion tank), only a water circulation test can be performed on the entire cabinet, that is, the water pump is connected to the power supply to run, and then the entire water circulation system is observed to see if there are any leaks. For the power module, the overall water circulation replaces the individual pressure test. Due to the problem of circulating water pressure, and the module is installed inside the cabinet, it is impossible to observe whether there is a leak in the internal pipeline of a single module through the appearance. If there is a slight leak in the internal pipeline of the module, it cannot be discovered in the first time. Long-term use after installation will cause the weak link to expand and cause the coolant to overflow. Since the module is subjected to 3770V high voltage electricity, it will eventually cause the module to explode and even cause a locomotive fire, posing a great hidden danger to driving safety.

[0004] At present, the power module pressure test of the HXD2B locomotive traction converter is carried out by performing a cooling water leakage test on the fully assembled traction converter cabinet. There is no tooling that can perform a separate pressure test on the power module. In this case, firstly, due to the fact that only 7.8m 3 / h flow rate for leakage test, and the water outlet is finally connected to the cooling water tank and directly to the atmosphere, basically no water pressure is used for leakage test; secondly, in the case of overall assembly, due to space issues, it is difficult to find small internal leaks; thirdly, once there is internal leakage in the power module, it needs to be disassembled and reworked. Therefore, if the power module can be tested separately for pressure maintenance, the water pressure and test duration can be flexibly adjusted according to needs, which greatly facilitates the sealing verification of the cooling pipeline after the power module is repaired. Utility Model Content

[0005] The utility model aims to provide a traction converter power module pressure holding fixture to solve the problems existing in the above-mentioned prior art, so that the power module can be subjected to a separate pressure holding test, thereby improving the working efficiency of the pressure holding test.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a traction inverter power module pressure maintaining tooling, comprising an experimental platform, a support frame, a connector and a connecting pipe, the experimental platform is provided with the support frame, and a plurality of groups of connectors are symmetrically arranged on the support frame, each group of connectors comprises an upper connector and a lower connector, the upper connector in the same group is used for correspondingly plugging in a cooling water interface of the power module, and the lower connector is used for plugging in another cooling water interface of the same power module, the upper connector in the same group is connected to the upper connector of an adjacent group through the connecting pipe, and the lower connector is connected to the lower connector of another adjacent group through the connecting pipe, and finally the connecting pipe and the internal pipeline of the power module are connected end to end in sequence to form a circulation pipeline, the ends of the circulation pipeline are respectively connected to a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe are used to connect a pressure maintaining and liquid filling integrated device.

[0008] Preferably, several pairs of fixing rods are symmetrically connected to the support frame, and the two fixing rods on the same side are arranged in parallel up and down. A fixing rod is correspondingly connected to a connecting head, the upper connecting head is arranged on the fixing rod of the upper layer, and the lower connecting head is arranged on the fixing rod of the lower layer.

[0009] Preferably, the connecting head is clamped in a pressing plate, and the pressing plate is connected to the fixing rod by bolts.

[0010] Preferably, a waist-shaped connecting hole in a vertical direction is provided on the fixing rod or the column of the supporting frame, and the waist-shaped connecting hole is connected to the supporting frame by bolts.

[0011] Preferably, the bolt can slide 5mm-15mm in the waist-shaped connecting hole, and the height of the fixing rod corresponds to the cooling water interface of the power module.

[0012] Preferably, the support frame is a rectangular frame, and three groups of connectors are respectively arranged on two sides of the rectangular frame.

[0013] Preferably, a plurality of groups of positioning studs are symmetrically arranged on the top rod of the support frame, and each positioning stud is used to connect a fixing bolt of the power module.

[0014] Preferably, a plurality of groups of positioning slide rails are symmetrically arranged on the experimental platform, and each of the positioning slide rails is used to correspond to and match a bottom slide groove of the power module; and four rollers with brakes are arranged at the bottom of the experimental platform.

[0015] Preferably, the connector is a quick-connect connector made of stainless steel.

[0016] Preferably, the connecting pipe is a rubber hose, and the connecting head is sealedly connected to the connecting pipe and the cooling water interface of the power module.

[0017] Compared with the prior art, the utility model has achieved the following technical effects:

[0018] The utility model can perform cooling water pressure maintenance test on power modules separately, which is connected with external pressure maintenance and liquid filling integrated device through water inlet pipe and water outlet pipe. The pressure maintenance and liquid filling integrated device, power modules and connecting pipe form a complete set of closed and interconnected water circulation passages, which can perform pressure maintenance test of set pressure, and the water pressure can be adjusted as needed, thereby improving the standard and accuracy of leakage test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the pressure-maintaining tooling for the power module of the traction converter in the embodiment of the utility model;

[0021] Figure 2 This is a front view of a pressure-maintaining tooling for a traction converter power module in an embodiment of the utility model;

[0022] Figure 3 It is a side view of a pressure-maintaining tooling for a power module of a traction converter in an embodiment of the utility model;

[0023] Figure 4 A top view of a pressure-maintaining tooling for a power module of a traction converter in an embodiment of the utility model;

[0024] In the figure: 1-experimental platform, 2-support frame, 3-quick plug connector, 4-connecting pipe, 5-pressure plate, 6-positioning stud, 7-fixing rod, 8-waist-shaped connecting hole, 9-positioning slide rail, 10-roller with brake, 11-liquid inlet pipe, 12-liquid outlet pipe, 13-waterproof curtain. DETAILED DESCRIPTION

[0025] 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.

[0026] The utility model aims to provide a traction converter power module pressure-maintaining tooling to solve the problems existing in the prior art, so that the power module can be subjected to a separate pressure-maintaining test, thereby improving the working efficiency of the pressure-maintaining test.

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] like Figures 1 to 4 As shown, in this embodiment, a traction inverter power module pressure maintaining tooling is provided, including an experimental platform 1, a support frame 2, a connector and a connecting pipe 4. The experimental platform 1 is provided with a support frame 2, and a plurality of groups of connectors are symmetrically arranged on the support frame 2, each group of connectors includes an upper connector and a lower connector, the upper connector in the same group is used to correspond to a cooling water interface of the power module, and the lower connector is used to connect another cooling water interface of the same power module, the upper connector in the same group is connected to the upper connector of an adjacent group through the connecting pipe 4, and the lower connector is connected to the lower connector of another adjacent group through the connecting pipe 4, and finally the connecting pipe 4 is connected to the internal pipeline of the power module end to end in sequence to form a circulation pipeline, and the ends of the circulation pipeline are respectively connected to the liquid inlet pipe 11 and the liquid outlet pipe 12, and the liquid inlet pipe 11 and the liquid outlet pipe 12 are used to connect the pressure maintaining and filling integrated device. The tooling of this embodiment can be changed from the existing water circulation leakage test to a 6kg pressure holding test, which improves the leakage test standard, and the water pressure can be adjusted as needed, further improving the test accuracy; simulating the installation state of the traction inverter, fixing the power module on the test station; connecting each power module in series for testing, thereby improving the test efficiency.

[0029] As an optional solution, in this embodiment, several pairs of fixed rods 7 are symmetrically connected to the support frame 2, and the two fixed rods 7 on the same side are arranged in parallel up and down. A corresponding connecting head is connected to each fixed rod 7, and each upper connecting head is arranged on the upper fixed rod 7, and each lower connecting head is arranged on the lower fixed rod 7, reserving installation space and facilitating the adjustment of the position of each fixed rod 7.

[0030] As an optional solution, in this embodiment, the connector is clamped in a pressing plate 5, and the pressing plate 5 is connected to the fixing rod 7 by bolts, which is convenient for disassembly and replacement.

[0031] As an optional solution, in this embodiment, a waist-shaped connecting hole 8 in a vertical direction is provided on the fixing rod 7 or the column of the support frame 2, and the waist-shaped connecting hole 8 is connected to the support frame 2 by bolts. Preferably, in this embodiment, the bolt can slide 5mm-15mm (adjustable height range) in the waist-shaped connecting hole 8, and the height of the fixing rod 7 corresponds to the cooling water interface of the power module. Since the cooling water interface of each power module may have inconsistent distances due to manufacturing errors, the present application is provided with a waist-shaped hole with adjustable height, which can accurately adjust the height of the fixing rod 7 and the connector within its manufacturing error range, so as to fully match the slight difference in height of the cooling water interface on the module, so that all power modules of the HXD2B locomotive can be matched to the greatest extent, solving the problem that the pressure holding test can only be carried out in the original position.

[0032] As an optional solution, the support frame 2 in this embodiment is a rectangular frame, and three groups of connectors are respectively arranged on both sides of the rectangular frame, and the whole is in a "non" shape after being installed. Preferably, a waterproof curtain 13 of transparent material is also hung between the top rod and the bottom rod of the support frame 2 in this embodiment by bolts, and transparent plastic can be selected. The two waterproof curtains 13 are respectively located on both sides of a power module or a pair of connectors, which can waterproof the power module when the pipeline leaks. In this embodiment, the support frame 2 is 1.2m long, and the height and width are both about 38cm, and the parallel spacing between adjacent positioning slide rails 9 is about 40cm.

[0033] As an optional solution, in this embodiment, a plurality of groups of positioning studs 6 are symmetrically arranged on the top rod of the support frame 2, and each positioning stud 6 is used to connect a fixing bolt of a power module to facilitate fixing the power module.

[0034] As an optional solution, in this embodiment, several groups of positioning slide rails 9 are symmetrically arranged on the experimental platform 1, and each positioning slide rail 9 is used to correspond to the bottom slide groove of a power module, so as to facilitate one-way positioning of the power module; four rollers 10 with brakes are arranged at the bottom of the experimental platform 1 for easy movement and fixation.

[0035] As an optional solution, the connector in this embodiment is a quick-insert connector 3 made of stainless steel, which is convenient for quick installation.

[0036] As an optional solution, in this embodiment, the connecting pipe 4 is a rubber hose, and the connector is sealed to the connecting pipe 4 and the cooling water interface of the power module to ensure the sealing of the pipeline outside the power module.

[0037] The pressure test operation of the traction converter power module pressure test tool of this embodiment is as follows: first, make sure that all pipelines are installed in place and well connected to the cooling water pipeline of the power module, turn on the pressure test equipment to perform a 6kg water pressure test, and maintain the pressure test for 4 hours. The final pressure drop is not more than 0.5kg, which is qualified. This embodiment solves the problem that the power module cannot be leak tested alone by constructing an external pipeline system matching the power module, and innovatively formulates a module water pressure test method, further improving the leakage test standard of the power module, and can realize 6 groups of power modules in series for pressure test at the same time, and can adjust the pressure and test time as needed, greatly improving the test efficiency and test accuracy, and the basic skills required for the maintenance personnel are not high; in addition, the special tooling has a simple structure and low production cost, which is convenient for promotion and use in the railway locomotive maintenance industry.

[0038] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A traction converter power module pressure-maintaining tool, characterized in that: It includes an experimental platform, a support frame, a connector and a connecting pipe. The support frame is arranged on the experimental platform. Several groups of connectors are symmetrically arranged on the support frame. Each group of connectors includes an upper connector and a lower connector. The upper connector in the same group is used to correspond to a cooling water interface of a power module, and the lower connector is used to plug in another cooling water interface of the same power module. The upper connector in the same group is connected to the upper connector of an adjacent group through the connecting pipe, and the lower connector is connected to the lower connector of another adjacent group through the connecting pipe. Finally, the connecting pipe and the internal pipeline of the power module are connected end to end in sequence to form a circulation pipeline. The ends of the circulation pipeline are respectively connected to the liquid inlet pipe and the liquid outlet pipe. The liquid inlet pipe and the liquid outlet pipe are used to connect the pressure-maintaining and liquid-filling integrated device.

2. The traction converter power module pressure-maintaining fixture according to claim 1, characterized in that: A plurality of pairs of fixing rods are symmetrically connected to the support frame, and the two fixing rods on the same side are arranged in parallel up and down. A fixing rod is correspondingly connected to a connecting head, the upper connecting head is arranged on the fixing rod of the upper layer, and the lower connecting head is arranged on the fixing rod of the lower layer.

3. The traction converter power module pressure-maintaining fixture according to claim 2, characterized in that: The connecting head is clamped in a pressing plate, and the pressing plate is connected to the fixing rod by bolts.

4. The traction converter power module pressure-maintaining fixture according to claim 2, characterized in that: The fixing rod or the column of the support frame is provided with a waist-shaped connecting hole in a vertical direction, and the waist-shaped connecting hole is connected to the support frame by bolts.

5. The traction converter power module pressure-maintaining fixture according to claim 4, characterized in that: The bolt can slide 5mm-15mm in the waist-shaped connecting hole, and the height of the fixing rod corresponds to the cooling water interface of the power module.

6. The traction converter power module pressure-maintaining fixture according to claim 1, characterized in that: The support frame is a rectangular frame, and three groups of connectors are respectively arranged on two sides of the rectangular frame.

7. The traction converter power module pressure-maintaining fixture according to claim 1, characterized in that: A plurality of groups of positioning studs are symmetrically arranged on the top rod of the support frame, and each positioning stud is used to connect a fixing bolt of the power module.

8. The traction converter power module pressure-maintaining fixture according to claim 1, characterized in that: Several groups of positioning slide rails are symmetrically arranged on the experimental platform, and each positioning slide rail is used to correspond to and match a bottom slide groove of the power module; four rollers with brakes are arranged at the bottom of the experimental platform.

9. The traction converter power module pressure-maintaining fixture according to claim 1, characterized in that: The connector is a quick-plug connector made of stainless steel.

10. The traction converter power module pressure-maintaining fixture according to claim 1, characterized in that: The connecting pipe is a rubber hose, and the connecting head is sealedly connected to the connecting pipe and the cooling water interface of the power module.

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