Device for detecting air tightness of butterfly valve of vacuum excrement collector of railway vehicle

Abstract

The utility model discloses a device for detecting the air tightness of a butterfly valve of a vacuum excrement collector of a railway vehicle, which comprises a base, a detection mechanism arranged at the top end of the base, a butt joint mechanism arranged at the top end of the detection mechanism, an air supply mechanism arranged on the inner wall of the base, and a pressure gauge arranged in the middle of the top end of the air storage tank, one side of the top end of the air storage tank fixedly communicates with an air outlet pipe, one end of the air outlet pipe is provided with a first electromagnetic valve, one end of the first electromagnetic valve is provided with a connecting thread sleeve, and the connecting thread sleeve is internally in threaded connection with a butt joint. According to the utility model, the detection mechanism is matched with the butt joint mechanism, in the butt joint mechanism, a two-way lead screw drives a square moving block, then an arc-shaped clamping block stably clamps a butterfly valve, an electric cylinder can drive a transverse moving plate, then the butterfly valve is in tight butt joint with a butt joint connected with a connecting thread sleeve in the detection mechanism, tight butt joint of the butterfly valve is ensured, and accurate detection of the butterfly valve is ensured; detection efficiency is improved, and personnel operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valve detection equipment, in particular to a device for detecting the air tightness of a butterfly valve of a vacuum toilet for rail vehicles. Background Technique

[0002] With the improvement of people's awareness of environmental protection, the through toilets commonly used on railways in the past have been gradually replaced by vacuum toilets with less environmental pollution because they cause serious damage to the environment along the railway, have a greater impact on the service life of railway tracks and locomotive equipment parts, and endanger the health of line maintenance personnel and residents along the line. The butterfly valve is an important part of the vacuum toilet. The inspection regulations for passenger cars require the butterfly valve to be inspected in the actual use state. Therefore, there are many problems such as difficulty in finding fault points, narrow inspection space, and difficulty in installing and disassembling the butterfly valve.

[0003] In view of this, the utility model patent with the publication number of CN208704989U discloses a device for detecting the air tightness of a butterfly valve of a vacuum toilet for railway passenger cars, which includes a pressure maintaining container, a butterfly valve test joint, an exhaust valve, a vacuum generator, a cut-off cock and an air compressor; the butterfly valve test joint and the exhaust valve are both communicated with the inside of the pressure maintaining container. The butterfly valve test joint is installed at the upper end of the pressure maintaining container, and the exhaust valve is installed at the bottom end of the pressure maintaining container. The vacuum generator is communicated with the inside of the pressure maintaining container through pipeline I. A vacuum pressure gauge is arranged on the vacuum generator. The vacuum generator is connected to the air compressor through pipeline II, and the cut-off cock is installed on pipeline II. The device of the utility model pre-performs an air tightness test on the butterfly valve before it is installed on the vehicle, eliminating the rework after it is found that the air tightness is unqualified during the on-vehicle test, greatly saving labor costs and improving the efficiency of on-site inspection of railway passenger cars, and solving the problems of difficult air tightness inspection of the current butterfly valve, lag in debugging time of the vacuum toilet, and low inspection efficiency.

[0004] However, there are still some problems in the detection device in the above patent application: when the current detection device is in use, it is necessary to ensure that the butterfly valve is tightly connected. It is difficult for the butterfly valve to be tightly docked with the docking head, which easily leads to large deviations in detection and affects the detection process of the butterfly valve. Content of the Utility Model

[0005] In order to solve the above problems, the purpose of the utility model is to provide a device for detecting the air tightness of a butterfly valve of a vacuum toilet for rail vehicles to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides a device for detecting the air tightness of a butterfly valve of a vacuum toilet for rail vehicles, which includes a base. A detection mechanism is arranged at the top end of the base, a docking mechanism is arranged at the top end of the detection mechanism, and a gas supply mechanism is arranged on the inner wall of the base;

[0007] The detection mechanism includes an air storage tank. A pressure gauge is installed in the middle of the top end of the air storage tank, and an air outlet pipe is fixedly communicated with one side of the top end of the air storage tank. One end of the air outlet pipe is equipped with a first solenoid valve, one end of the first solenoid valve is equipped with a connecting sleeve, and a docking head is connected to the connecting sleeve by internal thread.

[0008] The docking mechanism includes a mounting plate. An electric cylinder is installed at the top end of the mounting plate. The output end of the electric cylinder is fixedly provided with a transverse moving plate. A driving box is fixedly provided at the top end of the transverse moving plate. A bidirectional lead screw is rotatably connected in the driving box. Square moving blocks are threadedly connected to both sides of the outer wall of the bidirectional lead screw. A support block is fixedly provided at the top end of each square moving block, and an arc-shaped clamping block is fixedly provided at the top end of each support block.

[0009] As a preferred technical solution of the present utility model, a support rod is fixedly provided at the bottom end of the first solenoid valve, and the bottom end of the support rod is fixedly connected to the surface of the top end of the air storage tank. A sealing ring is fixedly provided at one end of the docking head.

[0010] As a preferred technical solution of the present utility model, a stepping motor is installed at one end of the driving box, and the output end of the stepping motor is fixedly connected to one end of the bidirectional lead screw. Fixed blocks are fixedly provided at two corners of the top end of the mounting plate. A limiting rod is fixedly provided on one side of each fixed block. The limiting rods are inserted into the limiting holes opened at both ends of one side of the transverse moving plate, and a limiting cap is threadedly connected to one end of each limiting rod.

[0011] As a preferred technical solution of the present utility model, an exhaust port is fixedly communicated with one end of the air storage tank, and a second solenoid valve is installed at one end of the exhaust port.

[0012] As a preferred technical solution of the present utility model, the air supply mechanism includes an air pump. The air outlet end of the air pump is installed with a third solenoid valve. One end of the third solenoid valve is installed with an air inlet pipe, and the top end of the air inlet pipe is fixedly communicated with the bottom end of the air storage tank.

[0013] As a preferred technical solution of the present utility model, a switch panel is fixedly provided on one side of the air storage tank. A first solenoid valve switch, a second solenoid valve switch, an electric cylinder switch, a stepping motor switch, and a third solenoid valve switch are fixedly provided on the surface of the switch panel. The first solenoid valve, the second solenoid valve, the electric cylinder, the stepping motor, and the third solenoid valve are respectively electrically connected to an external power supply through the first solenoid valve switch, the second solenoid valve switch, the electric cylinder switch, the stepping motor switch, and the third solenoid valve switch.

[0014] The device for detecting the airtightness of the butterfly valve of the vacuum toilet of a rail vehicle proposed by the present utility model can bring the following beneficial effects:

[0015] 1. The device for detecting the airtightness of the butterfly valve of the vacuum toilet of rail vehicles, through the cooperation of the detection mechanism and the docking mechanism. In the docking mechanism, the bidirectional lead screw drives the square moving block, and then the arc-shaped clamping block stably clamps the butterfly valve. The electric cylinder can drive the transverse moving plate, and then the docking head connected to the connecting sleeve in the detection mechanism is tightly docked with the butterfly valve, ensuring the tight docking of the butterfly valve, ensuring the accurate detection of the butterfly valve, improving the detection efficiency, and making the operation of personnel more convenient.

[0016] 2. The device for detecting the airtightness of the butterfly valve of the vacuum toilet of rail vehicles, through the detection mechanism arranged on the base. A connecting sleeve is installed on the first solenoid valve connected to the air outlet pipe. The connecting sleeve is threadedly connected with a docking head, and the docking head is connected with a sealing ring. Personnel can select and replace the docking head according to the specifications of the butterfly valve, making it more convenient and fast to use and having a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a schematic connection structural diagram of the detection mechanism of the present invention;

[0020] Figure 3 is a schematic connection structural diagram of the air outlet pipe of the present invention;

[0021] Figure 4 is a schematic structural diagram of the docking mechanism of the present invention.

[0022] In the figure: 1. Base; 2. Detection mechanism; 201. Gas storage tank; 202. Air outlet pipe; 203. First solenoid valve; 204. Connecting sleeve; 205. Docking head; 206. Sealing ring; 207. Pressure gauge; 208. Exhaust port; 209. Second solenoid valve; 210. Support rod; 3. Docking mechanism; 301. Mounting plate; 302. Electric cylinder; 303. Transverse moving plate; 304. Fixed block; 305. Limit rod; 306. Driving box; 307. Bidirectional lead screw; 308. Stepper motor; 309. Square moving block; 310. Arc-shaped clamping block; 4. Air supply mechanism; 401. Air pump; 402. Third solenoid valve; 403. Air inlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to more clearly explain the overall concept of the present invention, the following is a detailed description by way of example in combination with the drawings of the specification.

[0024] AsFigures 1 to 4 As shown in the figure, an embodiment of the present utility model provides a device for detecting the air tightness of a butterfly valve of a vacuum toilet for rail vehicles, including a base 1. A detection mechanism 2 is arranged at the top end of the base 1. A docking mechanism 3 is arranged at the top end of the detection mechanism 2. An air supply mechanism 4 is arranged on the inner wall of the base 1;

[0025] The detection mechanism 2 includes an air storage tank 201. A pressure gauge 207 is installed in the middle of the top end of the air storage tank 201. One side of the top end of the air storage tank 201 is fixedly communicated with an air outlet pipe 202. A first electromagnetic valve 203 is installed at one end of the air outlet pipe 202. A connection sleeve 204 is installed at one end of the first electromagnetic valve 203. A docking head 205 is in threaded connection with the inner thread of the connection sleeve 204. A support rod 210 is fixedly arranged at the bottom end of the first electromagnetic valve 203. The bottom end of the support rod 210 is fixedly connected with the surface of the top end of the air storage tank 201. A sealing ring 206 is fixedly arranged at one end of the docking head 205. One end of the air storage tank 201 is fixedly communicated with an exhaust port 208. A second electromagnetic valve 209 is installed at one end of the exhaust port 208;

[0026] The docking mechanism 3 includes a mounting plate 301. An electric cylinder 302 is installed at the top end of the mounting plate 301. A transverse moving plate 303 is fixedly arranged at the output end of the electric cylinder 302. A driving box 306 is fixedly arranged at the top end of the transverse moving plate 303. A bidirectional lead screw 307 is rotatably connected inside the driving box 306. Square moving blocks 309 are in threaded connection with both sides of the outer wall of the bidirectional lead screw 307. A support block is fixedly arranged at the top end of each square moving block 309. An arc-shaped clamping block 310 is fixedly arranged at the top end of each support block. A stepping motor 308 is installed at one end of the driving box 306. The output end of the stepping motor 308 is fixedly connected with one end of the bidirectional lead screw 307. Fixed blocks 304 are fixedly arranged at both corners of the top end of the mounting plate 301. A limiting rod 305 is fixedly arranged on one side of each fixed block 304. The limiting rods 305 are inserted into the limiting holes opened at both ends of one side of the transverse moving plate 303. A limiting cap is in threaded connection with one end of each limiting rod 305.

[0027] The air supply mechanism 4 includes an air pump 401. A third electromagnetic valve 402 is installed at the air outlet end of the air pump 401. An air inlet pipe 403 is installed at one end of the third electromagnetic valve 402. The top end of the air inlet pipe 403 is fixedly communicated with the bottom end of the air storage tank 201. A switch panel is fixedly arranged on one side of the air storage tank 201. A first electromagnetic valve switch, a second electromagnetic valve switch, an electric cylinder switch, a stepping motor switch and a third electromagnetic valve switch are fixedly arranged on the surface of the switch panel. The first electromagnetic valve 203, the second electromagnetic valve 209, the electric cylinder 302, the stepping motor 308 and the third electromagnetic valve 402 are respectively electrically connected to an external power supply through the first electromagnetic valve switch, the second electromagnetic valve switch, the electric cylinder switch, the stepping motor switch and the third electromagnetic valve switch.

[0028] Working principle: When using this detection device, the user places the butterfly valve in the closed state between two arc-shaped clamping blocks 310. The stepping motor 308 on the drive box 306 drives the bidirectional lead screw 307, thereby driving two square moving blocks 309 to approach each other. The two arc-shaped clamping blocks 310 can then stably clamp the butterfly valve. At this time, the electric cylinder 302 on the mounting plate 301 drives the transverse movement plate 303, and the transverse movement plate 303 moves along the limit rod 305, thus driving the butterfly valve to move. One end of the butterfly valve can be accurately docked with the docking head 205. The docking head 205 is connected with a sealing ring 206. With the drive of the electric cylinder 302, the connection between the butterfly valve and the docking head 205 can be ensured to be tight.

[0029] The first solenoid valve 203 is opened, and the second solenoid valve 209 is closed. At this time, in the air supply mechanism 4, the air pump 401 is started, and the third solenoid valve 402 is opened, so that air can be supplied to the gas storage tank 201 through the air inlet pipe 403, and then the butterfly valve is in communication with the gas in the gas storage tank 201. The third single solenoid valve 402 is closed. At this time, the pressure index is observed through the pressure gauge 207. If the pressure index remains stable, it means that the airtightness of the butterfly valve is good.

[0030] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A device for detecting the air tightness of a butterfly valve of a vacuum toilet collection tank of a railway vehicle, comprising a base (1), a detection mechanism (2) being arranged at the top of the base (1), a docking mechanism (3) being arranged at the top of the detection mechanism (2), and an air supply mechanism (4) being arranged on the inner wall of the base (1), characterized in that: The detection mechanism (2) comprises a gas storage tank (201), a pressure gauge (207) is installed in the middle of the top of the gas storage tank (201), and one side of the top of the gas storage tank (201) is fixedly connected to an air outlet pipe (202), one end of the air outlet pipe (202) is installed with a first solenoid valve (203), one end of the first solenoid valve (203) is installed with a connecting screw sleeve (204), and the connecting screw sleeve (204) is internally threadedly connected to a butt joint (205); The docking mechanism (3) comprises a mounting plate (301), an electric cylinder (302) is mounted on the top of the mounting plate (301), a transverse plate (303) is fixedly mounted on the output end of the electric cylinder (302), a driving box (306) is fixedly mounted on the top of the transverse plate (303), a bidirectional lead screw (307) is rotatably connected inside the driving box (306), square moving blocks (309) are threadedly connected to both sides of the outer wall of the bidirectional lead screw (307), a support block is fixedly mounted on the top of each square moving block (309), and an arc-shaped clamping block (310) is fixedly mounted on the top of each support block.

2. The device for detecting the air tightness of the butterfly valve of a vacuum toilet tank of a railway vehicle according to claim 1, characterized in that: A support rod (210) is fixedly provided at the bottom end of the first solenoid valve (203), the bottom end of the support rod (210) is fixedly connected to the surface of the top end of the gas storage tank (201), and a sealing ring (206) is fixedly provided at one end of the docking joint (205).

3. The device for detecting the air tightness of a butterfly valve of a vacuum toilet tank of a railway vehicle according to claim 1, characterized in that: A stepper motor (308) is installed at one end of the drive box (306), and the output end of the stepper motor (308) is fixedly connected to one end of the bidirectional lead screw (307). Fixed blocks (304) are fixedly provided at two corners of the top of the mounting plate (301), and a limiting rod (305) is fixedly provided on one side of each of the fixed blocks (304). Limiting rods (305) are inserted into limiting holes opened at both ends of one side of the transverse plate (303), and one end of each of the limiting rods (305) is threadedly connected to a limiting cap.

4. The device for detecting the air tightness of the butterfly valve of the vacuum toilet collection tank of a railway vehicle according to claim 3, characterized in that: One end of the gas storage tank (201) is fixedly connected to an exhaust port (208), and one end of the exhaust port (208) is installed with a second solenoid valve (209).

5. The device for detecting the air tightness of the butterfly valve of the vacuum toilet collection tank of a railway vehicle according to claim 4, characterized in that: The air supply mechanism (4) comprises an air pump (401), a third solenoid valve (402) being installed at the air outlet end of the air pump (401), an air inlet pipe (403) being installed at one end of the third solenoid valve (402), and a top end of the air inlet pipe (403) being fixedly connected to a bottom end of the air storage tank (201).

6. The device for detecting the air tightness of the butterfly valve of the vacuum toilet tank of a railway vehicle according to claim 5, characterized in that: A switch panel is fixedly provided on one side of the gas storage tank (201); a first solenoid valve switch, a second solenoid valve switch, an electric cylinder switch, a stepping motor switch and a third solenoid valve switch are fixedly provided on the surface of the switch panel; the first solenoid valve (203), the second solenoid valve (209), the electric cylinder (302), the stepping motor (308) and the third solenoid valve (402) are electrically connected to an external power supply via the first solenoid valve switch, the second solenoid valve switch, the electric cylinder switch, the stepping motor switch and the third solenoid valve switch, respectively.

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