Internal combustion locomotive air dryer experimental device

Abstract

The utility model discloses an experimental device for an air dryer of a diesel locomotive, and belongs to the technical field of locomotive air dryer experiments. Comprising a pedestal, a controller for complete machine control, a pressure tank body, a dryer clamp, an air supply unit and an exhaust unit, and a vertical plate is integrally manufactured at the top of the pedestal; a notch is formed in one end of the pedestal; the controller is mounted at the top of the vertical plate through a supporting arm; the pressure tank body is mounted on the pedestal; the pressure tank body is connected to a three-way valve; the three-way valve is fixed on a vertical plate; the dryer clamp is fixed on the pedestal and is arranged on one side far away from the pressure tank body; the dryer clamp comprises a supporting table, and a supporting cylinder base is fixed to the top face of the supporting table. The supporting table communicates with the interior of the supporting cylinder base, and a sliding way is formed in the bottom of the inner side of the supporting table. The experimental device for the air dryer of the internal combustion locomotive can deeply analyze the performance of the dryer and ensure the drying effectiveness of the air dryer.

Description

Technical Field

[0001] The utility model specifically relates to an internal combustion locomotive air dryer experimental device, belonging to the technical field of locomotive air dryer experiments. Background Art

[0002] Diesel locomotive air dryers are generally used to purify the compressed air within the locomotive's brake system, removing impurities such as water, oil, and dust. This prevents impure air from corroding internal brake system components and accelerating wear of pneumatic components. To ensure the drying effectiveness of the air dryer, testing of air dryer indicators is necessary. For example, during air tightness testing, the dryer cylinder is relatively small, and the inflation process required to reach the required test pressure is short. However, due to gaps between the piping and the adsorbent within the dryer cylinder, air can flow into these gaps after sealing the dryer's inlet and outlet, resulting in a significant pressure drop and affecting the accuracy of the measured pressure. The key to improving test methods often lies in improving the test apparatus. For example, Chinese Patent Publication No. CN210180689U discloses a test apparatus for locomotive and EMU air dryers. This apparatus takes into account air tightness testing, significantly improving measurement accuracy while simplifying the test process and increasing efficiency. However, this apparatus only tests the dryer's air tightness and cannot conduct in-depth experimental analysis of the dryer. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes an internal combustion locomotive air dryer experimental device, which can test the air tightness and regeneration hole diversion flow rate of the dryer and can conduct in-depth experiments on the dryer.

[0004] The utility model of the internal combustion locomotive air dryer experimental device comprises:

[0005] A pedestal, wherein the top of the pedestal is integrally formed with a vertical plate; one end of the pedestal is provided with a notch;

[0006] A controller for controlling the entire machine, the controller being mounted on the top of the vertical plate via a support arm;

[0007] A pressure tank body, the pressure tank body being mounted on a pedestal; the pressure tank body being connected to a three-way valve, the three-way valve being fixed on a vertical plate;

[0008] A dryer fixture is fixed on a pedestal and is disposed on a side away from the pressure tank body; the dryer fixture includes a support platform, a support cylinder seat is fixed to the top surface of the support platform; the support platform and the support cylinder seat are internally connected, and a slideway is provided on the bottom inner side of the support platform; an electric slide with two sliders is fixed in the notch, and two chucks are provided in the slideway, and the chucks are fixed directly to one slider;

[0009] An air supply unit, comprising two air inlet branches connected to the three-way valve, wherein the air inlet branches are sequentially connected to a first pressure transmitter, a one-way valve, and a second pressure transmitter;

[0010] The exhaust unit includes an exhaust filter cover fixed on the vertical plate; the exhaust filter cover is provided with two exhaust branches, and the exhaust branches are connected to a flow transmitter and an exhaust valve in sequence.

[0011] During the diesel locomotive air dryer test, the dryer cylinder of the diesel locomotive air dryer is inserted from the support cylinder seat into the inner side of the support platform. Next, the electric slide is activated, and the two chucks are driven toward each other by the dual sliders, guided by the slideway. The two chucks thus clamp the outer wall of the dryer cylinder, completing the fixation of the diesel locomotive air dryer. Next, the pipelines are connected, and the intake and exhaust branches are connected to the intake and exhaust ports of the diesel locomotive air dryer respectively. The diesel locomotive air dryer test is then carried out. The experimental process is as follows:

[0012] The air tightness test is selected through the controller, and the valve group on one intake branch pipe is opened, and the valve groups on the other intake branch pipe, the main air cylinder interface valve group and the exhaust branch pipe are all closed. Specifically: the pressure tank body and the intake branch pipe with the valve group opened are connected through the three-way valve. At this time, the pure pressurized gas in the pressure tank body passes through the three-way valve, the first pressure transmitter, the one-way valve and the second pressure transmitter in sequence; when the second pressure transmitter reaches the set pressure, the three-way valve is closed, and at the same time, the one-way valve synchronously realizes the reverse flow locking; at this time, the diesel locomotive air dryer is in the pressure holding test state. Within the set threshold time, if the pressure value monitored by the second pressure transmitter is not lower than the set pressure value, the air tightness test passes. When the pressure value monitored by the second pressure transmitter is lower than the set pressure value, the pressure difference between the first pressure transmitter and the second pressure transmitter is judged. When the difference exceeds the set value, it is determined that the air supply pipeline is leaking. When the difference is lower than the set value, it is determined that the diesel locomotive air dryer air tightness test fails. Pass; when the air tightness test is passed, the dryer regeneration hole diversion flow test is carried out, specifically: Tower A of the diesel locomotive air dryer is used as a drying tower and Tower B as a regeneration tower, so that the compressed pure pressure gas enters Tower A. After being dried by the desiccant in Tower A, most of the gas pushes open the air outlet check valve of Tower A to the main air cylinder interface, and another small part enters Tower B through the regeneration hole, expands into extremely dry regeneration air, and then flows to the desiccant in Tower B, thereby taking away the moisture in the desiccant in Tower B, and finally discharged to the outside through the exhaust branch pipe of Tower B. When discharging, the exhaust valve is opened and the flow value is monitored by the flow transmitter. When the flow value is within the set range, the air outlet check valve and regeneration hole flow distribution test of Tower A are passed; then, Tower B of the diesel locomotive air dryer is used as a drying tower and Tower A as a regeneration tower, and the experiment is carried out according to the above process, and the air outlet check valve and regeneration hole flow distribution test of Tower B are carried out; when the above experiments all meet the standards, the diesel locomotive air dryer passes the test.

[0013] Furthermore, a pressure equalizing valve or a pressure pump is provided between the pressure tank body and the three-way valve; the high-pressure pure gas stored in the pressure tank body is steadily supplied to the three-way valve through the pressure equalizing valve, or continuously supplied to the three-way valve through the pressure pump.

[0014] Furthermore, a plurality of open slots are provided on the top of the support cylinder seat; the open slots can facilitate the placement of the air dryer inside the support cylinder seat, and at the same time, facilitate the removal of the air dryer from the support cylinder seat after the experiment is completed.

[0015] Furthermore, when the screw of the electric slide rotates clockwise, the double sliders approach each other, and when the screw of the electric slide rotates counterclockwise, the double sliders move away from each other; when the electric slide rotates clockwise, the double sliders drive the chuck to clamp the outer wall of the drying cylinder of the air dryer. After the experiment is completed, the electric slide rotates counterclockwise, and the two chucks move away from the air dryer.

[0016] Furthermore, the pedestal and the vertical plate are provided with brackets for the air intake branch pipe and the exhaust branch pipe. Before and after the experiment, the air intake branch pipe and the exhaust branch pipe can be hung and placed on the brackets.

[0017] Furthermore, the pressure tank is provided with a pressure gauge, which monitors the pressure value of the pressure tank in real time. When the pressure value is lower than the set value, the pressure tank can be filled with pure air or other gases, or a fully filled pressure tank can be used to replace a pressure tank with a low pressure value.

[0018] Compared with the existing technology, the diesel locomotive air dryer test device of the utility model can not only test the air tightness of the dryer through the pressure maintenance test method, but also test the diversion flow of the dryer regeneration hole, and can conduct an in-depth analysis of the dryer performance to ensure the drying effectiveness of the air dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the diesel locomotive air dryer experimental device of the present utility model.

[0020] Figure 2 This is a schematic diagram of the connection structure between the experimental device of the utility model and the air dryer of a diesel locomotive.

[0021] Reference numerals: 1, pedestal, 2, vertical plate, 3, controller, 4, pressure tank, 5, three-way valve, 6, support platform, 7, support cylinder seat, 8, slide, 9, electric slide, 10, chuck, 11, intake branch pipe, 12, first pressure transmitter, 13, one-way valve, 14, second pressure transmitter, 15, exhaust filter cover, 16, exhaust branch pipe, 17, flow transmitter, 18, exhaust valve, 19, open slot, 20, diesel locomotive air dryer, DETAILED DESCRIPTION

[0022] Example:

[0023] like Figure 1 and Figure 2 The diesel locomotive air dryer experimental device shown includes:

[0024] The pedestal 1 has a vertical plate 2 integrally formed on the top of the pedestal 1; a notch is provided at one end of the pedestal 1;

[0025] A controller 3 for controlling the entire machine, the controller 3 being mounted on the top of the vertical plate 2 via a support arm;

[0026] A pressure tank body 4 is mounted on the pedestal 1 ; the pressure tank body 4 is connected to a three-way valve 5 , and the three-way valve 5 is fixed on the vertical plate 2 ;

[0027] A dryer fixture is fixed to a pedestal 1 and is disposed on a side away from the pressure tank body 4. The dryer fixture includes a support platform 6, a support cylinder seat 7 is fixed to the top surface of the support platform 6; the support platform 6 and the support cylinder seat 7 are internally connected, and a slideway 8 is provided on the bottom inner side of the support platform 6; an electric slide 9 with two sliders is fixed in the notch, and two chucks 10 are provided in the slideway 8, and the chuck 10 is fixed directly to one of the sliders;

[0028] An air supply unit, comprising two air inlet pipes 11 connected to the three-way valve 5, wherein the air inlet pipes 11 are sequentially connected to a first pressure transmitter 12, a one-way valve 13, and a second pressure transmitter 14;

[0029] The exhaust unit includes an exhaust filter cover 15 fixed on the vertical plate 2; the exhaust filter cover 15 is provided with two exhaust branch pipes 16, and the exhaust branch pipes 16 are connected to a flow transmitter 17 and an exhaust valve 18 in sequence.

[0030] During the test of the diesel locomotive air dryer 20, the drying cylinder of the diesel locomotive air dryer 20 was inserted from the cylinder support seat 7 into the inner side of the support platform 6. Next, the electric slide 9 was activated, and the two chucks 10 were driven toward each other by the dual sliders, and guided by the slideway 8. The two chucks 10 thus clamped the outer wall of the drying cylinder, completing the fixation of the diesel locomotive air dryer 20. Next, the pipelines were connected, and the intake branch pipe 11 and the exhaust branch pipe 16 were connected to the intake and exhaust ports of the diesel locomotive air dryer 20, respectively. Then, the diesel locomotive air dryer 20 test was carried out. The experimental process of the diesel locomotive air dryer 20 is as follows:

[0031] The airtightness test is selected through the controller 3. The valve group on one air intake branch pipe 11 is opened, and the valve group on the other air intake branch pipe 11, the main air cylinder interface valve group 21 and the exhaust branch pipe 16 are all closed. Specifically, the pressure tank body 4 and the air intake branch pipe 11 with the valve group opened are connected through the three-way valve 5. At this time, the pure pressurized gas in the pressure tank body 4 passes through the three-way valve 5, the first pressure transmitter 12, the one-way valve 13 and the second pressure transmitter 14 in sequence; when the second pressure transmitter 14 reaches the set pressure, the three-way valve 5 is closed, and at the same time, the one-way valve 13 is synchronously realized. Backflow lock; at this time, the diesel locomotive air dryer 20 is in the pressure holding test state. When the pressure value monitored by the second pressure transmitter 14 is not lower than the set pressure value within the set threshold time, the air tightness test is passed. When the pressure value monitored by the second pressure transmitter 14 is lower than the set pressure value, the pressure difference between the first pressure transmitter 12 and the second pressure transmitter 14 is judged. When the difference exceeds the set value, it is determined that the air supply line is leaking. When the difference is lower than the set value, it is determined that the diesel locomotive air dryer 20 has failed the air tightness test. When the air tightness After the experiment is passed, the dryer regeneration hole diversion flow experiment is carried out. Specifically, the A tower 22 of the diesel locomotive air dryer 20 is used as a drying tower and the B tower 23 is used as a regeneration tower, so that the compressed pure pressure gas enters the A tower 22. After being dried by the desiccant in the A tower 22, most of it pushes open the outlet check valve 24 of the A tower 22 to the main air cylinder interface, and another small part enters the B tower 23 through the regeneration hole 25, expands into extremely dry regeneration air, and then flows to the desiccant in the B tower 23, thereby taking away the moisture in the desiccant in the B tower 23, and finally passes through the B tower 23. The exhaust branch pipe 16 of tower 23 is discharged outside. When discharging outside, the exhaust valve 18 is opened and the flow value is monitored by the flow transmitter 17. When the flow value is within the set range, the flow distribution test of the air outlet check valve 24 and the regeneration hole 25 of tower A 22 is passed; then, tower B 23 of the diesel locomotive air dryer 20 is used as a drying tower and tower A 22 is used as a regeneration tower, and experiments are carried out according to the above process to carry out the flow distribution test of the air outlet check valve 24 and the regeneration hole 25 of tower B 23; when the above experiments all meet the standards, the diesel locomotive air dryer 20 passes the test.

[0032] A pressure equalizing valve or a pressure pump is provided between the pressure tank body 4 and the three-way valve 5; the high-pressure pure gas stored in the pressure tank body 4 is steadily supplied to the three-way valve 5 through the pressure equalizing valve, or continuously supplied to the three-way valve 5 through the pressure pump.

[0033] The top of the support cylinder seat 7 is provided with a plurality of open slots 19 ; the open slots 19 can facilitate the placement of the air dryer inside the support cylinder seat 7 , and at the same time, facilitate the removal of the air dryer from the support cylinder seat 7 after the experiment is completed.

[0034] When the screw rod of the electric slide 9 rotates clockwise, the two sliders approach each other, and when the screw rod of the electric slide 9 rotates counterclockwise, the two sliders move away from each other; when the electric slide 9 rotates clockwise, the chuck 10 is driven by the double sliders to clamp the outer wall of the drying cylinder of the air dryer. After the experiment is completed, the electric slide 9 rotates counterclockwise, and the two chucks 10 move away from the air dryer.

[0035] The pedestal 1 and the vertical plate 2 are provided with brackets for the air intake branch pipe 11 and the exhaust branch pipe 16 . Before and after the experiment, the air intake branch pipe 11 and the exhaust branch pipe 16 can be hung and placed on the brackets.

[0036] The pressure tank body 4 is provided with a pressure gauge, which monitors the pressure value of the pressure tank body 4 in real time. When the pressure value is lower than the set value, the pressure tank body 4 can be filled with pure air or other gas, or the fully filled pressure tank body 4 can be used to replace the pressure tank body 4 with the low pressure value.

[0037] The above embodiments are only preferred implementations of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. An internal combustion locomotive air dryer experimental device, characterized by: include A pedestal, wherein the top of the pedestal is integrally formed with a vertical plate; one end of the pedestal is provided with a notch; A controller for controlling the entire machine, the controller being mounted on the top of the vertical plate via a support arm; A pressure tank body, the pressure tank body being mounted on a pedestal; the pressure tank body being connected to a three-way valve, the three-way valve being fixed on a vertical plate; A dryer fixture is fixed on a pedestal and is disposed on a side away from the pressure tank body; the dryer fixture includes a support platform, a support cylinder seat is fixed to the top surface of the support platform; the support platform and the support cylinder seat are internally connected, and a slideway is provided on the bottom inner side of the support platform; an electric slide with two sliders is fixed in the notch, and two chucks are provided in the slideway, and the chucks are fixed directly to one slider; An air supply unit, comprising two air inlet branches connected to the three-way valve, wherein the air inlet branches are sequentially connected to a first pressure transmitter, a one-way valve, and a second pressure transmitter; The exhaust unit includes an exhaust filter cover fixed on the vertical plate; the exhaust filter cover is provided with two exhaust branches, and the exhaust branches are connected to a flow transmitter and an exhaust valve in sequence.

2. The diesel locomotive air dryer experimental device according to claim 1, characterized in that: A pressure equalizing valve or a pressure pump is provided between the pressure tank body and the three-way valve.

3. The diesel locomotive air dryer experimental device according to claim 1, characterized in that: A plurality of open slots are provided on the top of the support cylinder seat.

4. The diesel locomotive air dryer experimental device according to claim 1, characterized in that: When the screw rod of the electric slide rotates clockwise, the two sliders approach each other, and when the screw rod of the electric slide rotates counterclockwise, the two sliders move away from each other.

5. The diesel locomotive air dryer experimental device according to claim 1, characterized in that: The pedestal and the vertical plate are provided with brackets for the air intake branch pipe and the exhaust branch pipe.

6. The diesel locomotive air dryer experimental device according to claim 1, characterized in that: The pressure tank body is provided with a pressure gauge.

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