A gas flowmeter sealing performance test system

Abstract

The present invention discloses a gas flowmeter sealing performance testing system, which relates to the technical field of sealing performance testing. The system includes a measurement water pool, on which an intermediate enclosure is fixedly and sealingly arranged. On the intermediate enclosure, a top cover is fixedly and sealingly arranged. At the top of the inner wall of the top cover, a projection plate is fixed. A circular through hole is provided at the center of the projection plate, and an irradiation lamp is arranged on the through hole. The light emitted by the irradiation lamp can pass through the through hole. By means of dynamic flow control and light and shadow capture technology, the present invention can simulate the dynamic changes of the gas flowmeter during actual use, improving the comprehensiveness and accuracy of the detection results. Secondly, it reduces manual intervention, simplifies the operation process, and improves the detection efficiency and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing performance testing, and specifically to a gas flowmeter sealing performance testing system. Background Art

[0002] The existing gas flowmeter sealing detection methods mainly rely on traditional static detection. The gas flowmeter is pressurized, and whether there is air leakage is judged by observing the pressure change in the gas flowmeter. However, this method has multiple deficiencies. First, static detection cannot simulate the dynamic changes that may occur during the actual use of the flowmeter, resulting in incomplete detection results. Second, the traditional method usually requires a long time to observe and judge, with low efficiency and unable to meet the needs of large-scale production. Summary of the Invention

[0003] To overcome the defects of the above-mentioned prior art, the present invention provides the following technical solution: A gas flowmeter sealing performance testing system, including a measurement water tank, an intermediate enclosure is fixedly and sealingly arranged on the measurement water tank, a top cover is fixedly and sealingly arranged on the intermediate enclosure, a projection plate is fixed on the top of the inner wall of the top cover, a circular through hole is arranged at the center of the projection plate, an irradiation lamp is arranged on the through hole, and the light emitted by the irradiation lamp can pass through the through hole; on both sides of the inner walls of the intermediate enclosure and the measurement water tank, a first baffle and a second baffle are inserted and sealed, and a camera is fixed on one of the first baffle or the second baffle for observing the change of the reflection pattern on the projection plate, and the gas flowmeter to be detected for sealing performance is arranged between the first baffle and the second baffle.

[0004] Preferably, a heat sink is fixed on the side of the irradiation lamp away from the projection plate, a window is opened on the intermediate enclosure, and a sealing door panel is movably installed at the window, and the sealing door panel is in sealing cooperation with the window.

[0005] Preferably, a one-way flow pipe is fixedly installed on the first baffle, the one-way flow pipe is used to connect the intake pipe and the fixed installation pipe, a stepped hole is arranged inside the one-way flow pipe, a plug core is slidably arranged in the stepped hole through a plug core support, so that the outer diameter of the plug core is smaller than the inner diameter of the one-way flow pipe, the plug core is in contact and sealing cooperation with the intake pipe, and the plug core support is in contact with the stepped surface of the stepped hole on the one-way flow pipe to prevent the plug core from contacting the fixed installation pipe, and a ball valve is connected in series on the intake pipe.

[0006] Preferably, a first support side plate and a second support side plate are fixedly installed on the second baffle, a movable installation pipe is slidably installed on the first support side plate and the second support side plate in a spline manner, and flange plates are arranged at the opposite ends of the movable installation pipe and the fixed installation pipe for installing the gas flowmeter to be detected for sealing performance.

[0007] Preferably, two driving gears are symmetrically arranged on both sides of the floating mounting pipe between the opposite surfaces of the first support side plate and the second support side plate. The two driving gears are meshed and driven through a linkage gear ring rotatably sleeved on the floating mounting pipe, and one of the driving gears is fixed to the output shaft of a driving motor fixed on the first support side plate.

[0008] Preferably, a screw rod arc-shaped frame is fixed to the bottom surface of the inner wall of the measuring pool. Two screw rods that are parallel and symmetrically arranged are rotatably mounted on the screw rod arc-shaped frame. The two screw rods are respectively fixedly matched with the two driving gears, and a dragging frame is threadedly mounted on the two screw rods. The dragging frame is slidably sleeved on the circumferential surface of the floating mounting pipe.

[0009] Preferably, a first limiting ring and a second limiting ring are fixed on the circumferential surface of the floating mounting pipe on both sides of the dragging frame. The second limiting ring is in contact and cooperation with the dragging frame, and an extrusion spring is arranged between the first limiting ring and the dragging frame. The extrusion spring is wound around the circumferential surface of the floating mounting pipe.

[0010] Preferably, a pressure nozzle is arranged on the fixed mounting pipe, and a pressure pipe is communicated with the pressure nozzle. The pressure pipe is connected to a supercharging air pump.

[0011] Preferably, an electric control valve is fixedly arranged on one side of the middle surrounding frame away from the air inlet pipe. The water inlet of the electric control valve is flexibly communicated with one end of the floating mounting pipe away from the fixed mounting pipe through a hose.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention can quickly judge whether there is an air leakage problem in the gas flowmeter. Through the ripples formed on the surface of the clear water after the bubbles burst, and in cooperation with the irradiation lamp and the camera for precise capture, the detection efficiency is greatly improved. Traditional methods usually require a long time and cumbersome operation steps, while the present invention simplifies the detection process and shortens the detection time through automation and light and shadow capture technology, significantly improving the production efficiency; (2) While detecting the sealing performance, the present invention can also precisely control the gas flow through the ball valve and the electric control valve, so as to measure the sealing performance of the gas flowmeter in the dynamic working state. Traditional sealing tests usually only target static situations, while the present invention can simulate the gas flow state in actual use, providing more real and comprehensive test data, which helps to improve the reliability and performance of the product; (3) Through the design of the driving motor and the linkage gear ring, the present invention realizes the automatic clamping and release of the gas flowmeter, avoiding the cumbersome and error of manual operation. In addition, the application of the camera and the light and shadow capture technology reduces the manual intervention in the detection process, improving the accuracy and reliability of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall external structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the overall internal structure of the present invention.

[0015] Figure 3 This is a schematic diagram of the structure at the projection board of the present invention.

[0016] Figure 4 This is a schematic diagram of the structure at the fixed installation pipe of the present invention.

[0017] Figure 5 This is the present invention Figure 4 Schematic diagram of the structure at position A.

[0018] Figure 6 This is the present invention Figure 4 Schematic diagram of the structure at position B.

[0019] Figure 7 This is a schematic diagram of the structure at the dragging frame of the present invention.

[0020] In the figure: 101 - top cover; 102 - middle enclosure; 103 - measuring pool; 104 - first baffle; 105 - second baffle; 106 - camera; 107 - projection board; 108 - heat sink; 109 - irradiation lamp; 110 - intake pipe; 111 - ball valve; 112 - unidirectional flow pipe; 113 - plug core support; 114 - plug core; 115 - fixed installation pipe; 116 - pressure nozzle; 117 - pressure pipe; 118 - floating installation pipe; 119 - screw rod arc frame; 120 - screw rod; 121 - first limit ring; 122 - compression spring; 123 - dragging frame; 124 - second limit ring; 125 - driving gear; 126 - driving motor; 127 - first support side plate; 128 - second support side plate; 129 - linkage gear ring; 130 - hose; 131 - electric control valve; 132 - positioning seat; 133 - sealing door panel. Detailed implementation manners

[0021] The following combines with the attached Figure 1-7 drawings and further illustrates the technical solution of the present invention through specific implementation manners.

[0022] The present invention provides a gas flowmeter sealing performance testing system, which includes a measuring water tank 103. An intermediate enclosure 102 is fixedly and sealingly arranged on the measuring water tank 103. A top cover 101 is fixedly and sealingly arranged on the intermediate enclosure 102. A projection plate 107 is fixed to the top of the inner wall of the top cover 101. A circular through-hole is provided at the center of the projection plate 107, and an irradiation lamp 109 is arranged on the through-hole, and the light emitted by the irradiation lamp 109 can pass through the through-hole. On both sides of the inner walls of the intermediate enclosure 102 and the measuring water tank 103, a first baffle 104 and a second baffle 105 are inserted and sealed. A camera 106 is fixed on either the first baffle 104 or the second baffle 105 for observing the change of the reflected pattern on the projection plate 107. The gas flowmeter to be detected for sealing performance is arranged between the first baffle 104 and the second baffle 105. A heat sink 108 is fixed on the side of the irradiation lamp 109 away from the projection plate 107. A window is provided on the intermediate enclosure 102, and a sealing door panel 133 is movably installed at the window, and the sealing door panel 133 is in sealing cooperation with the window. A one-way flow pipe 112 is fixedly installed on the first baffle 104. The one-way flow pipe 112 is used to connect the intake pipe 110 and the fixed installation pipe 115. A stepped hole is arranged inside the one-way flow pipe 112, and a plug core 114 is slidably arranged in the stepped hole through a plug core support 113, so that the outer diameter of the plug core 114 is smaller than the inner diameter of the one-way flow pipe 112. The plug core 114 is in contact and sealing cooperation with the intake pipe 110, and the plug core support 113 is in contact and cooperation with the stepped surface of the stepped hole of the one-way flow pipe 112 to prevent the plug core 114 from contacting the fixed installation pipe 115. A ball valve 111 is connected in series on the intake pipe 110. A first support side plate 127 and a second support side plate 128 are fixedly installed on the second baffle 105. A movable installation pipe 118 is slidably installed on the first support side plate 127 and the second support side plate 128 in a spline manner. Flange plates are arranged at the opposite ends of the movable installation pipe 118 and the fixed installation pipe 115 for installing the gas flowmeter to be detected for sealing performance. Two driving gears 125 are symmetrically arranged on both sides of the movable installation pipe 118 between the opposite surfaces of the first support side plate 127 and the second support side plate 128. The two driving gears 125 are meshed and driven through a linkage gear ring 129 rotatably sleeved on the movable installation pipe 118. One of the driving gears 125 is fixed to the output shaft of a driving motor 126 fixed on the first support side plate 127. A screw rod arc-shaped frame 119 is fixed to the bottom surface of the inner wall of the measuring water tank 103. Two parallel and symmetrically arranged screw rods 120 are rotatably installed on the screw rod arc-shaped frame 119. The two screw rods 120 are respectively fixedly matched with the two driving gears 125. A dragging frame 123 is threadedly installed on the two screw rods 120, and the dragging frame 123 is slidably sleeved on the circumferential surface of the movable installation pipe 118.On the circumferential surface of the movable mounting pipe 118, a first limiting ring 121 and a second limiting ring 124 are fixed on both sides of the dragging frame 123. The second limiting ring 124 is in contact and cooperation with the dragging frame 123, and an extrusion spring 122 is arranged between the first limiting ring 121 and the dragging frame 123. The extrusion spring 122 is wound around the circumferential surface of the movable mounting pipe 118. A pressure nozzle 116 is arranged on the fixed mounting pipe 115, and a pressure pipe 117 is communicated with the pressure nozzle 116. The pressure pipe 117 is connected to a supercharging air pump. On one side of the middle surrounding frame 102 far from the air inlet pipe 110, an electric control valve 131 is fixedly arranged. The water inlet of the electric control valve 131 is flexibly communicated with one end of the movable mounting pipe 118 far from the fixed mounting pipe 115 through a hose 130.

[0023] The working principle of a gas flowmeter sealing performance testing system disclosed by the present invention is as follows: A positioning seat 132 is arranged between the opposite ends of the fixed mounting pipe 115 and the movable mounting pipe 118. A positioning seat 132 with a suitable size is selected according to the outer dimension of the gas flowmeter, and the positioning seat 132 is fixed at the bottom of the measuring water tank 103 (fixed in a way that is convenient for disassembly so as to replace the positioning seat 132). The gas flowmeter to be detected is placed on the positioning seat 132 through the sealing door plate 133, and then the driving motor 126 is controlled. The output shaft of the driving motor 126 will drive one of the driving gears 125 to rotate, and through the linkage tooth ring 129, the other driving gear 125 is simultaneously driven to rotate. The two driving gears 125 drive the two lead screws 120 to rotate. At this time, the dragging frame 123 can be driven to axially move on the driving gear 125, and at the same time, the first limiting ring 121 is pushed to move through the extrusion spring 122. The first limiting ring 121 is fixed on the movable mounting pipe 118, so the movable mounting pipe 118 will move, making the movable mounting pipe 118 approach the fixed mounting pipe 115 to clamp both ends of the gas flowmeter (before clamping, a sealing rubber ring needs to be arranged on the clamping surface to ensure its sealing performance and make it more conform to the actual working scenario).

[0024] Close the ball valve 111 and the electric control valve 131, and apply pressure inside the fixed installation pipe 115 of the booster air pump box. Since the fixed installation pipe 115, the movable installation pipe 118 and the gas flowmeter are the same inside, this pressure will also be applied to the gas flowmeter. At this time, the airtightness test of the gas flowmeter can be carried out. Since the gas flowmeter is arranged in the measurement water tank 103 and there is clear water in the measurement water tank 103, this test needs to be started when the surface of the clear water in the measurement water tank 103 is calm. When the gas flowmeter leaks, bubbles will appear on the surface of the gas flowmeter. These bubbles will float to the surface of the clear water and burst on the surface. The burst air bubbles will form ripples on the surface of the clear water. During the whole test process, the irradiation lamp 109 needs to be started. The light of the irradiation lamp 109 shines on the surface of the clear water, and part of the light is reflected onto the projection plate 107, and a uniform light spot is formed on the projection plate 107. When ripples occur, the light spot on the projection plate 107 is no longer uniform, the light spot is in a moving state, and a light and shadow synchronized with the ripples will be formed. Just capture this light and shadow with the camera 106 to judge whether there is air leakage in the gas flowmeter. Compared with the traditional airtightness test, it can judge whether there is air leakage in the gas flowmeter in a short time, so as to quickly find the defective gas flowmeter. If the ripples continue, it means that there are always bubbles, which also means that the airtightness of the gas flowmeter is poor.

[0025] In addition to the above, the electric control valve 131 can also be opened, and then the ball valve 111 can be partially opened. The opening and closing of the ball valve 111 can control the flow rate of the gas in the intake pipe 110, and at the same time, it can also control the flow rate of the gas passing through the gas flowmeter. This method can not only measure the sealing performance of the gas flowmeter under actual dynamic conditions, but also drain the water inside the fixed installation pipe 115, the movable installation pipe 118 and the gas flowmeter during the installation of the gas flowmeter (it needs to be selected according to the specific situation, or the clear water in the measurement water tank 103 can be drained before installing the gas flowmeter).

Claims

1. A gas flow meter sealing performance test system, characterized in that: The measuring water pool (103) comprises a measuring water pool (103), an intermediate frame (102) is fixedly and sealedly provided on the measuring water pool (103), a top cover (101) is fixedly and sealedly provided on the intermediate frame (102), a projection plate (107) is fixedly provided on the top of the inner wall of the top cover (101), a circular through hole is provided at the center of the projection plate (107), an irradiation lamp (109) is provided on the through hole, and light emitted by the irradiation lamp (109) can pass through the through hole; A first shielding plate (104) and a second shielding plate (105) are plugged and sealed on both sides of the inner wall of the middle enclosure (102) and the measuring water pool (103), wherein a camera (106) is fixed on the first shielding plate (104) or the second shielding plate (105) for observing changes in the reflection pattern on the projection plate (107), and a gas flow meter for detecting the sealing performance is arranged between the first shielding plate (104) and the second shielding plate (105); A heat sink (108) is fixed to a side of the irradiation lamp (109) away from the projection plate (107); a window is provided on the middle enclosure (102); a sealing door plate (133) is movably installed at the window; the sealing door plate (133) and the window are in sealing cooperation; a one-way flow pipe (112) is fixedly installed on the first shielding plate (104); the one-way flow pipe (112) is used to connect the air intake pipe (110) and the fixed installation pipe (115); A step hole is provided inside the moving tube (112), and a blocking core (114) is slidably provided in the step hole via a blocking core bracket (113), so that the outer diameter of the blocking core (114) is smaller than the inner diameter of the one-way flow tube (112), the blocking core (114) is in contact and sealing cooperation with the air intake pipe (110), and the blocking core bracket (113) is in contact and cooperation with the step surface of the step hole on the one-way flow tube (112), so as to prevent the blocking core (114) from contacting the fixed installation tube (115). A ball valve (111) is arranged in series on the air intake pipe (110); a first supporting side plate (127) and a second supporting side plate (128) are fixedly mounted on the second baffle plate (105); a floating mounting tube (118) is slidably mounted on the first supporting side plate (127) and the second supporting side plate (128) by means of a spline; flanges are arranged on the opposite ends of the floating mounting tube (118) and the fixed mounting tube (115) for mounting a gas flow meter for sealing detection; two driving gears (125) are symmetrically arranged on both sides of the floating mounting tube (118) between the opposite surfaces of the first supporting side plate (127) and the second supporting side plate (128); the two driving gears (125) are meshed and driven by a linkage gear ring (129) rotatably sleeved on the floating mounting tube (118); one of the driving gears (125) is fixed to an output shaft of a driving motor (126) fixed to the first supporting side plate (127).

2. A gas flow meter sealing performance test system according to claim 1, characterized in that: A screw rod arc frame (119) is fixed to the bottom surface of the inner wall of the measuring water pool (103), and two parallel and symmetrical screw rods (120) are rotatably mounted on the screw rod arc frame (119). The two screw rods (120) are respectively fixedly matched with two driving gears (125). A drag frame (123) is threadedly mounted on the two screw rods (120), and the drag frame (123) is slidably sleeved on the circumferential surface of the floating mounting tube (118).

3. A gas flow meter sealing performance testing system according to claim 2, characterized in that: A first limiting ring (121) and a second limiting ring (124) are fixed on the circumferential surface of the movable mounting tube (118) at both sides of the dragging frame (123), wherein the second limiting ring (124) is in contact with the dragging frame (123), and a compression spring (122) is arranged between the first limiting ring (121) and the dragging frame (123), and the compression spring (122) surrounds the circumferential surface of the movable mounting tube (118).

4. A gas flow meter sealing performance testing system according to claim 3, characterized in that: A pressure nozzle (116) is provided on the fixed installation tube (115), a pressure pipe (117) is provided in communication with the pressure nozzle (116), and the pressure pipe (117) is connected to a booster air pump.

5. A gas flow meter sealing performance testing system according to claim 4, characterized in that: An electric control valve (131) is fixedly arranged on one side of the middle enclosure frame (102) away from the air intake pipe (110), and a water inlet of the electric control valve (131) is flexibly connected to an end of the floating installation pipe (118) away from the fixed installation pipe (115) via a hose (130).

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