Positive and negative pressure integrated leakage detector for sewage tank
By designing an integrated leakage checker for positive and negative pressure in the dirt box, using the pressure gauge and pressure regulating valve on the vacuum generator and fixed seat, the problem of wind pressure cannot be controlled in the prior art is solved, and the precise control of the pressure in the dirt box is achieved, and maintenance efficiency and safety are improved.
Patent Information
- Application Number
- CN202421650775.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The existing dirt box leak search method cannot control the air pressure, resulting in excessive pressure damage to the connecting accessories, the tool is bulky and time-consuming, affecting maintenance efficiency.
A integrated leakage checker for positive and negative pressure of dirt box is designed, including a vacuum generator, a fixed seat, a pressure gauge and a pressure regulating valve. By connecting the pressure gauge and a three-way connector on the fixed seat, the pressure in the dirt box is realized intuitively controlled and adjusted.
Accurate control of pressure in the dirt box, avoiding damage, simple and lightweight structure, improving maintenance efficiency and safety.
Smart Images
Figure CN223122456U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of train maintenance, in particular to a positive and negative pressure integrated leak detector for a dirt box. Background Art
[0002] When the train is out of service for maintenance, it is necessary to conduct a pressure holding test on the toilet. Whether the test is qualified directly affects the performance of the toilet. In production work, the phenomenon of unqualified pressure holding often occurs. Except for the visible parts of the air and water control panel where leakage points are easily found, the dirt box body is wrapped with skin, and it is very difficult to find leakage points with negative pressure. It has the characteristics of strong concealment and great difficulty in finding leakage.
[0003] The existing methods for finding dirt box leakage cannot control the air pressure. The positive pressure is directly filled into the dirt box from the air source, and the pressure change inside the box cannot be controlled, which easily leads to the hidden danger of excessive pressure damaging the connecting fittings. Moreover, the currently used tools are too single and heavy, time-consuming, and affect the maintenance efficiency. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problems in the prior art that the pressure change inside the box cannot be controlled and the existing ones are relatively heavy and time-consuming in use, and to propose a positive and negative pressure integrated leak detector for a dirt box.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A positive and negative pressure integrated leak detector for a dirt box includes a vacuum generator, and also includes a fixed seat. The fixed seat is connected to the suction port of the vacuum generator through a third pipeline. A third valve is fixedly arranged on the third pipeline. A pressure gauge is fixedly arranged on the fixed seat, and a connecting pipe is fixedly arranged at one end of the fixed seat. A second pipeline is fixedly arranged at the other end of the fixed seat, and a second valve is fixedly arranged on the second pipeline.
[0007] Preferably, in order to facilitate the regulation of the air source pressure, a pressure regulating valve is further included. The output end of the pressure regulating valve is fixedly provided with a three-way joint, and the end of the second pipeline far from the fixed seat is connected to the three-way joint.
[0008] Further, in order to facilitate vacuum pumping, a first pipeline is fixedly arranged at the air inlet end of the vacuum generator. The end of the first pipeline far from the vacuum generator is connected to the three-way joint, and a first valve is fixedly arranged on the first pipeline.
[0009] Further, in order to reduce the weight and facilitate connection, both the first pipeline and the second pipeline are flexible hoses, and the third pipeline is made of stainless steel.
[0010] Preferably, a muffler is fixedly arranged at the air outlet end of the vacuum generator.
[0011] Preferably, the cross-section of the fixed seat is rectangular, and the material of the fixed seat is copper.
[0012] Compared with the prior art, the present utility model provides a positive and negative pressure integrated leak detector for a dirt box, having the following beneficial effects:
[0013] 1. For this positive and negative pressure integrated leak detector for a dirt box, by connecting a fixed seat to a vacuum generator and fixedly arranging a pressure gauge on the fixed seat, the pressure change inside the dirt box can be intuitively controlled, damage to the dirt box can be avoided, the use safety can be improved, and moreover, the structure is simple, the gravity is light, it is convenient to carry, and the maintenance efficiency can be improved;
[0014] 2. For this positive and negative pressure integrated leak detector for a dirt box, by fixedly arranging a three-way joint on a pressure regulating valve, then connecting the vacuum generator and the fixed seat to the three-way joint respectively, and connecting an air source to the input end of the pressure regulating valve, the gas pressure entering the vacuum generator or the fixed seat can be adjusted, further improving the use effect.
[0015] Parts not involved in this device are the same as or can be implemented by using the prior art. In the present utility model, by connecting a fixed seat to a vacuum generator and fixedly arranging a pressure gauge on the fixed seat, the pressure change inside the dirt box can be intuitively controlled, damage to the dirt box can be avoided, the use safety can be improved, and moreover, the structure is simple, the gravity is light, it is convenient to carry, and the maintenance efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic structural diagram of a positive and negative pressure integrated leak detector for a dirt box proposed by the present utility model Figure 1 ;
[0017] Figure 2 is a schematic structural diagram of a positive and negative pressure integrated leak detector for a dirt box proposed by the present utility model Figure 2 ;
[0018] Figure 3 is a schematic structural diagram of the fixed seat of a positive and negative pressure integrated leak detector for a dirt box proposed by the present utility model.
[0019] In the figure: 1. Vacuum generator; 2. Fixed seat; 201. Connecting pipe; 202. Pressure gauge; 3. Pressure regulating valve; 301. Three-way joint; 4. First pipeline; 401. Second pipeline; 402. Third pipeline; 5. First valve; 501. Second valve; 502. Third valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.
[0021] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0022] Embodiment:
[0023] Refer to Figures 1-3, A positive and negative pressure integrated leak detector for a dirt box, which includes a vacuum generator 1. A muffler is fixedly arranged at the air outlet end of the vacuum generator 1. The muffler can reduce the sound of the gas flowing out of the vacuum generator 1 and improve the use effect. It also includes a fixed seat 2. The cross-section of the fixed seat 2 is designed as a rectangle, and the material of the fixed seat 2 is selected from copper, aluminum or stainless steel. Here, we preferably choose copper. The fixed seat 2 is connected to the suction port of the vacuum generator 1 through a third pipeline 402. A third valve 502 is fixedly arranged on the third pipeline 402. A pressure gauge 202 is fixedly arranged on the fixed seat 2. And a connecting pipe 201 is fixedly arranged at one end of the fixed seat 2. A second pipeline 401 is fixedly arranged at the other end of the fixed seat 2. A second valve 501 is fixedly arranged on the second pipeline 401. When in use, when it is necessary to detect the dirt box under positive pressure, first close the third valve 502 on the third pipeline 402, connect the air source to the second pipeline 401, then connect the connecting pipe 201 to the dirt box, and then open the second valve 501 to fill the dirt box with gas. Through the pressure gauge 202, the pressure change in the dirt box can be intuitively controlled, avoiding excessive pressure in the box body, resulting in damage to the connecting fittings of the box body and improving the use effect. When the pressure reaches the predetermined value, close the second valve 501. After waiting for a period of time, by observing whether the value of the pressure gauge 202 decreases significantly, it can be judged whether there is a leak in the dirt box. When performing negative pressure detection on the dirt box, close the second valve 501 on the second pipeline 401, and at the same time open the third valve 502. Then connect the air source to the air inlet end of the vacuum generator 1. At this time, the gas from the air source and the gas in the dirt box can be discharged through the output end of the vacuum generator 1, and then a negative pressure can be generated in the dirt box. During this process, similarly, according to the value of the pressure gauge 202, the pressure of the dirt box is kept within an appropriate range to avoid damage to the dirt box and improve the use. After waiting for a period of time, by observing whether the value of the pressure gauge 202 decreases significantly, it can be judged whether there is a leak in the dirt box.
[0024] When in use, by connecting the fixed seat 2 to the vacuum generator 1 and fixedly arranging a pressure gauge 202 on the fixed seat 2, the pressure change in the dirt box can be intuitively controlled, avoiding damage to the dirt box, improving the use safety, and having a simple structure, light weight, convenient to carry, and can improve the maintenance efficiency; by fixedly arranging a three-way joint 301 on the pressure regulating valve 3, then connecting the vacuum generator 1 and the fixed seat 2 to the three-way joint 301 respectively, and connecting the air source to the input end of the pressure regulating valve 3, the gas pressure entering the vacuum generator 1 or the fixed seat 2 can be adjusted to further improve the use effect.
[0025] Refer to Figure 1 and Figure 2, a positive and negative pressure integrated leak detector for a dirt box, further comprising a pressure regulating valve 3. A tee joint 301 is fixedly arranged at the output end of the pressure regulating valve 3. One end of the second pipeline 401 far from the fixed seat 2 is communicated with the tee joint 301. During use, by connecting an air source to the input end of the pressure regulating valve 3, the gas pressure entering the vacuum generator 1 or the fixed seat 2 can be adjusted through the pressure regulating valve 3, improving the use safety and test convenience.
[0026] Refer to Figure 1 and Figure 2 , a first pipeline 4 is fixedly arranged at the air inlet end of the vacuum generator 1. One end of the first pipeline 4 far from the vacuum generator 1 is communicated with the tee joint 301. And a first valve 5 is fixedly arranged on the first pipeline 4. During use, by connecting the vacuum generator 1 to the tee joint 301 through the first pipeline 4, negative pressure can be generated in the dirt box through the vacuum generator 1, which is convenient to use.
[0027] Refer to Figure 1 and Figure 2 , we select both the first pipeline 4 and the second pipeline 401 as flexible hoses, and select the material of the third pipeline 402 as stainless steel. During use, by selecting the first pipeline 4 and the second pipeline 401 as flexible hoses, on the one hand, it is convenient to replace, and on the other hand, the weight can be reduced. By selecting the material of the third pipeline 402 as stainless steel, the corrosion resistance can be improved, and the strength can be increased to avoid deformation of the third pipeline 402, especially when sucking negative pressure, which affects the normal use.
[0028] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.
Claims
1. An integrated positive and negative pressure leak detector for a dirt box, comprising a vacuum generator (1), characterized in that, It further includes a fixed seat (2), the fixed seat (2) is communicated with the suction port of the vacuum generator (1) through a third pipeline (402), a third valve (502) is fixedly arranged on the third pipeline (402), a pressure gauge (202) is fixedly arranged on the fixed seat (2), and a connecting pipe (201) is fixedly arranged at one end of the fixed seat (2), and a second pipeline (401) is fixedly arranged at the other end of the fixed seat (2), and a second valve (501) is fixedly arranged on the second pipeline (401).
2. The integrated positive and negative pressure leak detector for a dirt bin according to claim 1, characterized in that, It further includes a pressure regulating valve (3), a tee joint (301) is fixedly arranged at the output end of the pressure regulating valve (3), and one end of the second pipeline (401) far away from the fixed seat (2) is communicated with the tee joint (301).
3. The integrated positive and negative pressure leak detector for a dirt box according to claim 2, characterized in that, A first pipeline (4) is fixedly arranged at the air inlet end of the vacuum generator (1), one end of the first pipeline (4) far away from the vacuum generator (1) is communicated with the tee joint (301), and a first valve (5) is fixedly arranged on the first pipeline (4).
4. The integrated positive and negative pressure leak detector for a dirt box according to claim 3, characterized in that, Both the first pipeline (4) and the second pipeline (401) are flexible hoses, and the third pipeline (402) is made of stainless steel.
5. The integrated positive and negative pressure leak detector for a dirt box according to claim 1, characterized in that, A muffler is fixedly arranged at the air outlet end of the vacuum generator (1).
6. The integrated positive and negative pressure leak detector for a dirt box according to claim 1, characterized in that, The cross section of the fixed seat (2) is rectangular, and the fixed seat (2) is made of copper.