Water pump air tightness test bench

Abstract

The utility model discloses a water pump air tightness test bench, which relates to the technical field of test benches and comprises an air tightness machine bench, a control top box and a two-stage three-way electromagnetic valve, a mechanical pressure gauge is embedded in the outer wall of the control top box, a plurality of groups of control buttons are arranged on the outer wall of the control top box, and a U-shaped test fixture is arranged on the outer wall of a ventilation air pipe. A first-level adjusting valve is installed on the inner wall of the airtight machine table, a second-level adjusting valve is installed on the inner wall of the airtight machine table, and a one-in and one-out electromagnetic valve is installed on the inner wall of the airtight machine table. According to the utility model, the air tightness inspection mechanism is installed, the U-shaped test fixture is connected with the water pump, the external ventilation air pipe is connected with the test bench, a first-stage regulating valve and a second-stage regulating valve of the test bench are adjusted to specified numerical values, a control button switch of the test bench is pressed down, the shaft of the water pump rotates 3-5 circles within 15 seconds, timing is stopped when the time reaches 15 seconds, and the air tightness of the water pump is detected. And when the mechanical pressure gauge of the test bench is still stabilized at 0.045 Mpa and the pointer value of the mechanical pressure gauge is not changed, the airtight test of the water pump is qualified.

Description

Technical Field

[0001] The utility model relates to the technical field of test benches, in particular to a water pump air tightness test bench. Background Art

[0002] The water pump is an important component in the cooling system of the HXN5 diesel locomotive. It plays a very critical role in the operation of the entire locomotive cooling system. It is the only water pump on the entire locomotive and is responsible for circulating cooling of the cooling water in the entire locomotive cooling system. It is especially important that the air tightness pressure test of the water pump after daily maintenance and assembly is very critical. After the water pump is overhauled and assembled, the air tightness pressure test pressure is in the range of 0.034-0.048MPa, the pressure gauge pointer does not change within 15 seconds, and the water pump water seal, oil seal and shell air tightness pressure test are qualified. Therefore, the water pump air tightness test pressure test is the main way to check whether the water pump is leaking at this stage. The quality of the water pump air tightness test will directly affect the safe and reliable operation of the locomotive, so a water pump air tightness test bench is needed.

[0003] Since the HXN5 locomotive water pump must be tested for air tightness after inspection and assembly to detect whether there is any leakage in the assembly status of each component, there is no special test equipment for domestic HXN5 locomotives at this stage. Now, a tool consisting of a meter, a stop valve and a elbow is used for testing. The elbow head is wrapped with raw tape and inserted into the drain hole of the water pump housing and pressed by hand. The stop valve is opened to fill air for testing. When using the tool for testing, it is difficult to control the test wind pressure. Sometimes the water seal leaks due to excessive wind pressure. At the same time, the elbow head of the tool and the drain hole of the water pump housing are sealed with raw tape, which is prone to leakage due to poor sealing. It is difficult for operators to determine where the leakage is. They often replace oil seals, water seals and housings because the leakage cannot be found, which prolongs the maintenance time of the entire water pump and increases the workload. One person cannot complete the test and at least two people are required. In actual inspection, assembly and air tightness pressure test, human and material factors are relatively large. Therefore, it is very necessary to have a water pump air tightness test bench with simple test installation, convenient operation, reliable performance and high timing accuracy. Utility Model Content

[0004] The utility model aims to provide a water pump air tightness test bench to solve the technical problem proposed in the above background technology that the water pump air tightness test bench can be used to conveniently detect the air tightness of the water pump.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a water pump air tightness test bench, comprising: an airtight machine platform, an airtightness inspection mechanism is provided on the outer wall of the airtight machine platform, and the airtightness inspection mechanism is used to facilitate the inspection of the airtightness of the water pump;

[0006] The airtightness inspection mechanism includes a control top box, which is arranged on the top of the airtight machine. A mechanical pressure gauge is inlaid on the outer wall of the control top box. A plurality of control buttons are installed on the outer wall of the control top box. A ventilation groove is provided on the outer wall of the airtight machine. A stop valve is installed on the inner wall of the ventilation groove. A ventilation duct is installed on the outer wall of the ventilation groove. A U-shaped test fixture is installed on the outer wall of the ventilation duct. A locking hole is provided at the bottom of the U-shaped test fixture. A latch is installed on the inner wall of the locking hole. A first-level regulating valve is installed on the inner wall of the airtight machine. A second-level three-way solenoid valve is installed on the inner wall of the airtight machine. A second-level regulating valve is installed on the inner wall of the airtight machine. An inlet and an outlet solenoid valve are installed on the inner wall of the airtight machine. An equipment roller is installed at the bottom of the airtight machine.

[0007] Preferably, an outer wall of the airtight machine is provided with an assembly mechanism, and the assembly mechanism is used to facilitate the collection of tools and the fixing of the position of the airtight machine.

[0008] Preferably, the assembly mechanism comprises a displacement slide rail, and the displacement slide rail is arranged on the outer wall of the airtight machine.

[0009] Preferably, an assembly box is installed at the output end of the displacement slide rail, a hinge is installed at the top of the assembly box, and an assembly cover is installed on the outer wall of the hinge.

[0010] Preferably, an adhesive plate 1 is installed at the bottom of the assembly box.

[0011] Preferably, an adhesive plate 2 is installed on the outer wall of the adhesive plate 1, and a corrugated anti-sliding block is installed on the outer wall of the adhesive plate 2.

[0012] Preferably, a removable partition is installed on the inner wall of the assembly box.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model is equipped with an air tightness inspection mechanism, which is convenient for checking the air tightness of the water pump. The U-shaped test fixture is connected to the water pump, the external ventilation duct is connected to the test bench, the stop valve is opened to open the ventilation path, the first-level regulating valve and the second-level regulating valve of the test bench are adjusted to the specified values, and the control button switch of the test bench is pressed. When the mechanical pressure gauge reaches 0.045Mpa, the pressure gauge pointer is stable and unchanged, and the pressure holding indicator light goes out. When the mechanical pressure gauge of the test bench is still stable at 0.045Mpa, the pressure relief indicator light goes out, and the wind pressure after the pressure holding solenoid valve is emptied. When the pressure gauge of the test bench is still stable at 0.045Mpa, press the timing button switch of the test bench, the time relay starts timing, and the water pump shaft rotates 3-5 circles within 15 seconds. When it reaches 15 seconds, the timing stops. When the mechanical pressure gauge of the test bench is still stable at 0.045Mpa, the pointer value of the mechanical pressure gauge remains unchanged, and the water pump air tightness test is qualified;

[0015] 2. The utility model is equipped with an assembly mechanism, which is convenient for organizing tools and fixing the position of the airtight machine. The airtight machine is moved to the specified position by the equipment roller. At the same time, external tools are required when installing the U-shaped test fixture and the water pump. The airtight machine does not have the function of organizing tools, and the stopping stability of the airtight machine cannot be improved, which may cause the airtight machine to be in a disadvantageous position and affect the detection. Therefore, it is necessary to improve this. First, the assembly cover is opened by the hinge, and then the tools are located on both sides of the detachable partition for accommodation. Then, the airtight machine is moved to the specified position, and the displacement slide rail drives the assembly box to move, so that the corrugated anti-sliding block contacts the ground, thereby increasing its friction and avoiding the airtight machine from being in a disadvantageous position. At the same time, the corrugated anti-sliding block is worn out after long-term use and can be removed from the adhesive plate one by the adhesive plate two for disassembly and replacement, thereby making it more convenient to connect and install the airtight machine and the water pump, and to quickly assemble the water pump for easy detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the bottom plate of the U-shaped test fixture of the utility model;

[0018] Figure 3 This is a schematic diagram of the pneumatic principle of the airtightness test bench of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the ventilation groove of the utility model;

[0020] Figure 5 It is a partial structural schematic diagram of the assembly box of the utility model.

[0021] In the figure: 1. Airtight machine; 2. Control top box; 3. Mechanical pressure gauge; 4. Control button; 5. Ventilation path groove; 6. Stop valve; 7. Ventilation duct; 8. U-shaped test fixture; 9. Locking hole; 10. Latch; 11. Primary regulating valve; 12. Secondary three-way solenoid valve; 13. Secondary regulating valve; 14. One-in-one-out solenoid valve; 15. Equipment roller; 16. Displacement slide rail; 17. Assembly box; 18. Adhesive board one; 19. Adhesive board two; 20. Corrugated anti-slip block; 21. Removable partition; 22. Hinge; 23. Assembly cover. DETAILED DESCRIPTION

[0022] 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.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figure 1 , Figure 2 , Figure 3 and Figure 4A water pump air tightness test bench comprises: an airtight machine 1, an airtightness inspection mechanism is arranged on the outer wall of the airtight machine 1, the airtightness inspection mechanism is used to facilitate the airtightness inspection of the water pump, the airtightness inspection mechanism comprises a control top box 2, the control top box 2 is arranged on the top of the airtight machine 1, a mechanical pressure gauge 3 is inlaid and installed on the outer wall of the control top box 2, a plurality of control buttons 4 are installed on the outer wall of the control top box 2, a ventilation groove 5 is arranged on the outer wall of the airtight machine 1, a stop valve 6 is installed on the inner wall of the ventilation groove 5, a ventilation duct 7 is installed on the outer wall of the ventilation duct 7, a U-shaped test fixture 8 is installed on the outer wall of the ventilation duct 7, a locking hole 9 is arranged at the bottom of the U-shaped test fixture 8, a latch 10 is installed on the inner wall of the locking hole 9, the airtight machine The inner wall of the platform 1 is installed with a first-stage regulating valve 11, the inner wall of the airtight platform 1 is installed with a second-stage three-way solenoid valve 12, the inner wall of the airtight platform 1 is installed with a second-stage regulating valve 13, the inner wall of the airtight platform 1 is installed with an inlet and an outlet solenoid valve 14, and the bottom of the airtight platform 1 is installed with an equipment roller 15. First, insert the guide rod of the hollow screw in the U-shaped test fixture 8 into the drain hole of the water pump housing, align the two locking holes 9 of the U-shaped test fixture 8 with the flange holes of the water pump and fix them with the pin 10. After the sealing gasket on the guide rod is in close contact with the drain hole of the water pump housing, tighten the hollow screw handwheel, and then connect the external ventilation duct 7 with the ventilation groove 5. Then, the stop valve 6 works to make it circulate, and set the relay of the airtight platform 1. Adjust the timing time value to 15 seconds and stop, adjust the first-stage regulating valve 11 to 0.2Mpa, and the second-stage regulating valve 13 to 0.045Mpa, and the compressed air first enters the air inlet of the first-stage regulating valve 11, and the compressed air after the first-stage decompression enters the air inlet of the pneumatic second-stage three-way solenoid valve 12, and after the second-stage three-way solenoid valve 12 is energized and opened, the compressed air enters the air inlet of the second-stage regulating valve 13, and the compressed air after the second-stage decompression enters the air inlet of the one-in-one-out solenoid valve 14, and after the one-in-one-out solenoid valve 14 is energized and opened, the compressed air enters the mechanical pressure gauge 3 in one way, and the compressed air in the other way enters the sealed space formed in the water pump body through the air inlet rod of the test fixture device, press the control button 4 switch, The indicator light is on. Press the air charging button switch of the test bench. The pressure maintaining and pressure relief indicator lights are on. When the mechanical pressure gauge 3 reaches 0.045Mpa, the pointer of the mechanical pressure gauge 3 remains stable. Press the pressure maintaining button switch of the test bench. The pressure maintaining indicator light goes out. When the mechanical pressure gauge 3 of the test bench is still stable at 0.045Mpa, press the pressure relief button switch of the test bench. The pressure relief indicator light goes out. Drain the air pressure after the pressure maintaining solenoid valve. When the mechanical pressure gauge 3 of the test bench is still stable at 0.045Mpa, press the timing button switch of the test bench. The time relay starts timing. Turn the handle of the special tool for the rotating shaft. The water pump shaft rotates 3-5 times within 15 seconds. When it reaches 15 seconds, the timing stops. The mechanical pressure gauge 3 of the test bench is still stable at 0.When the pressure gauge pointer value remains unchanged at 045Mpa, the water pump airtightness test is qualified. Press the air filling button switch of the test bench, and the pressure maintaining and pressure relief indicators light up. Press the pressure relief button switch, and the pressure relief indicator goes out. The mechanical pressure gauge 3 of the test bench returns to zero. Press the pressure maintaining button switch, and the pressure maintaining indicator goes out. Disassemble the U-shaped test fixture 8, and the test is completed.

[0026] See also Figure 1 and Figure 5 The outer wall of the airtight machine 1 is provided with an assembly mechanism, which is used to facilitate the induction of tools and the fixing of the position of the airtight machine 1. The assembly mechanism includes a displacement slide 16, which is arranged on the outer wall of the airtight machine 1. An assembly box 17 is installed at the output end of the displacement slide 16, a hinge 22 is installed on the top of the assembly box 17, and an assembly cover 23 is installed on the outer wall of the hinge 22. An adhesive plate 18 is installed at the bottom of the assembly box 17, an adhesive plate 29 is installed on the outer wall of the adhesive plate 18, and a corrugated anti-slip block 20 is installed on the outer wall of the adhesive plate 29. A removable partition 21 is installed on the inner wall of the assembly box 17. The airtight machine 1 is moved to the specified position by using the equipment roller 15. At the same time, external tools are needed when installing the U-shaped test fixture 8 and the water pump, and the airtight machine 1 There is no function of summarizing the tools, and at the same time, it is impossible to improve the stopping stability of the airtight machine 1, which may cause the airtight machine 1 to be out of position and affect the detection. Therefore, it is necessary to improve this. First, the assembly cover 23 is opened by the hinge 22, and then the tools are located on both sides of the removable partition 21 for accommodation, and then the airtight machine 1 is moved to the specified position. The displacement slide rail 16 drives the assembly box 17 to move, so that the corrugated anti-sliding block 20 contacts the ground, increases its friction, and avoids the airtight machine 1 from being out of position. At the same time, the corrugated anti-sliding block 20 is worn out after long-term use and can be removed from the adhesive plate 1 18 through the adhesive plate 2 19 for disassembly and replacement, so that it is more convenient to connect and install the airtight machine 1 with the water pump, and quickly assemble the water pump for easy detection.

[0027] Working principle: first, insert the guide rod of the hollow screw in the U-shaped test fixture 8 into the drain hole of the water pump housing, align the two locking holes 9 of the U-shaped test fixture 8 with the flange holes of the water pump and fix them through the pin 10. After the sealing gasket on the guide rod is in close contact with the drain hole of the water pump housing, tighten the hollow screw handwheel, and then connect the external ventilation duct 7 with the ventilation groove 5. Then, the stop valve 6 works to make it circulate, set the timing value of the airtight machine 1 relay to 15 seconds to stop, adjust the first-level regulating valve 11 to 0.2Mpa, and the second-level regulating valve 13 to 0.045Mpa, and the compressed air first enters the air inlet of the first-level regulating valve 11, and the compressed air after the first-level decompression enters the air inlet of the pneumatic second-level three-way solenoid valve 12. After the second-level three-way solenoid valve 12 is energized and opened, the compressed air enters the air inlet of the second-level regulating valve 13, and the compressed air after the second-level decompression enters the air inlet of the one-in-one-out solenoid valve 14, and passes through the one-in-one After the outlet solenoid valve 14 is powered on and opened, compressed air enters the mechanical pressure gauge 3 in one way, and the compressed air in the other way enters the sealed space formed in the water pump body through the air inlet rod of the test fixture device. Press the control button 4 switch, the indicator light is on, press the air charging button switch of the test bench, the pressure maintaining and pressure relief indicator lights are on, and watch that when the mechanical pressure gauge 3 reaches 0.045Mpa, the pointer of the mechanical pressure gauge 3 remains stable, press the pressure maintaining button switch of the test bench, the pressure maintaining indicator light goes out, and when the mechanical pressure gauge 3 of the test bench is still stable at 0.045Mpa, press the pressure relief button switch of the test bench, the pressure relief indicator light goes out, and the wind pressure after the pressure maintaining solenoid valve is emptied. When the mechanical pressure gauge 3 of the test bench is still stable at 0.045Mpa, press the timing button switch of the test bench, the time relay starts timing, turn the handle of the special tool for the rotating shaft, and the water pump shaft rotates 3-5 times within 15 seconds. When it reaches 15 seconds, the timing stops, and the mechanical pressure gauge 3 of the test bench is still stable at 0.045Mpa, when the pointer value of the pressure gauge remains unchanged, the water pump airtight test is qualified, press the air charging button switch of the test bench, the pressure maintaining and pressure relief indicator lights are on, press the pressure relief button switch, the pressure relief indicator light goes out, the mechanical pressure gauge 3 of the test bench returns to zero, press the pressure maintaining button switch, the pressure maintaining indicator light goes out, remove the U-shaped test fixture 8, the test is completed, and the airtight machine 1 uses the equipment roller 15 to move to the specified position. At the same time, external tools are required when installing the U-shaped test fixture 8 and the water pump, and the airtight machine 1 does not have the function of summarizing the tools, and the stopping stability of the airtight machine 1 cannot be improved, which may cause the airtight machine 1 to be in a position. The situation that the airtight machine 1 is suitable for the detection is affected, so it is necessary to improve it. First, the assembly cover 23 is opened through the hinge 22, and then the tools are placed on both sides of the removable partition 21 for storage. Then the airtight machine 1 is moved to the specified position, and the displacement slide rail 16 drives the assembly box 17 to move, so that the corrugated anti-slip block 20 contacts the ground, increasing its friction and avoiding the airtight machine 1 from being cheap. At the same time, the corrugated anti-slip block 20 can be removed from the adhesive plate 1 18 by adhesive plate 2 19 after long-term use, and can be disassembled and replaced, so that the airtight machine 1 and the water pump can be connected and installed more conveniently, and the water pump can be assembled quickly and easily for detection.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A water pump air tightness test bench, comprising: An airtight machine (1), characterized in that an airtightness inspection mechanism is provided on the outer wall of the airtight machine (1), and the airtightness inspection mechanism is used to facilitate inspection of the airtightness of the water pump; The airtightness inspection mechanism comprises a control top box (2), the control top box (2) is arranged on the top of the airtight machine (1), a mechanical pressure gauge (3) is inlaid on the outer wall of the control top box (2), a plurality of control buttons (4) are installed on the outer wall of the control top box (2), a ventilation groove (5) is provided on the outer wall of the airtight machine (1), a stop valve (6) is installed on the inner wall of the ventilation groove (5), a ventilation duct (7) is installed on the outer wall of the ventilation duct (7), and a U-shaped test valve (6) is installed on the outer wall of the ventilation groove (5). A fixture (8), a locking hole (9) is provided at the bottom of the U-shaped test fixture (8), a latch (10) is installed on the inner wall of the locking hole (9), a primary regulating valve (11) is installed on the inner wall of the airtight machine (1), a secondary three-way solenoid valve (12) is installed on the inner wall of the airtight machine (1), a secondary regulating valve (13) is installed on the inner wall of the airtight machine (1), an inlet and an outlet solenoid valve (14) are installed on the inner wall of the airtight machine (1), and a device roller (15) is installed on the bottom of the airtight machine (1).

2. A water pump air tightness test bench according to claim 1, characterized in that: An outer wall of the airtight machine (1) is provided with an assembly mechanism, and the assembly mechanism is used to facilitate the organization of tools and to facilitate the fixing of the position of the airtight machine (1).

3. A water pump air tightness test bench according to claim 2, characterized in that: The assembly mechanism comprises a displacement slide rail (16), and the displacement slide rail (16) is arranged on the outer wall of the airtight machine platform (1).

4. A water pump air tightness test bench according to claim 3, characterized in that: An assembly box (17) is installed at the output end of the displacement slide rail (16), a hinge (22) is installed on the top of the assembly box (17), and an assembly cover (23) is installed on the outer wall of the hinge (22).

5. A water pump air tightness test bench according to claim 4, characterized in that: An adhesive plate 1 (18) is installed at the bottom of the assembly box (17).

6. A water pump air tightness test bench according to claim 5, characterized in that: The outer wall of the adhesive plate 1 (18) is installed with an adhesive plate 2 (19), and the outer wall of the adhesive plate 2 (19) is installed with a corrugated anti-sliding block (20).

7. The water pump air tightness test bench according to claim 5, characterized in that: The inner wall of the assembly box (17) is provided with a detachable partition (21).

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