System for testing sealing performance of gas flow meter

Abstract

The invention discloses a gas flowmeter sealing performance test system, and relates to the technical field of sealing performance test.The gas flowmeter sealing performance test system comprises a measuring pool, a middle enclosure frame is fixedly arranged on the measuring pool in a sealed mode, a top opening cover is fixedly arranged on the middle enclosure frame in a sealed mode, a projection plate is fixed to the top of the inner wall of the top opening cover, and a circular through hole is formed in the center of the projection plate; an irradiation lamp is arranged on the through hole, and light emitted by the irradiation lamp can penetrate through the through hole. Through the dynamic flow control and shadow capture technology, the dynamic change of the gas flowmeter in actual use can be simulated, and the comprehensiveness and accuracy of the detection result are improved. And secondly, manual intervention is reduced, the operation process is simplified, and the detection efficiency and reliability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sealing test, in particular to a gas flow meter sealing performance test system. Background Art

[0002] The gas flow meter sealing detection method in the prior art mainly relies on traditional static detection, which maintains the pressure of the gas flow meter and determines whether there is a leak by observing the pressure changes in the gas flow meter. However, this method has many shortcomings. First, static detection cannot simulate the dynamic changes that may occur in the flow meter during actual use, resulting in incomplete detection results. Secondly, traditional methods usually require a long time to observe and judge, which is inefficient and cannot meet the needs of large-scale production. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a gas flow meter sealing performance testing system, including a measuring water pool, an intermediate frame is fixedly and sealedly provided on the measuring water pool, a top cover is fixedly and sealedly provided on the intermediate frame, a projection plate is fixedly provided on the top of the inner wall of the top cover, a circular through hole is provided in the center of the projection plate, an irradiation lamp is provided on the through hole, and light emitted by the irradiation lamp can pass through the through hole; a first shielding plate and a second shielding plate are plugged and sealedly provided on both sides of the intermediate frame and the inner wall of the measuring water pool, wherein a camera is fixed on the first shielding plate or the second shielding plate for observing changes in the reflection pattern on the projection plate, and the gas flow meter required to detect the sealing performance is arranged between the first shielding plate and the second shielding plate.

[0004] Preferably, a heat sink is fixed to a side of the irradiation lamp away from the projection board, a window is provided on the middle surrounding frame, a sealing door panel is movably installed at the window, and the sealing door panel is sealed with the window.

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

[0006] Preferably, the first supporting side plate and the second supporting side plate are fixedly mounted on the second baffle plate, and the floating mounting tubes are slidably mounted on the first supporting side plate and the second supporting side plate by means of splines, and flanges are provided on the opposite ends of the floating mounting tube and the fixed mounting tube for installing the gas flow meter required for detecting the sealing performance.

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

[0008] Preferably, a screw arc frame is fixed to the bottom surface of the inner wall of the measuring water pool, and two parallel and symmetrical screws are rotatably mounted on the screw arc frame. The two screws are fixedly matched with two driving gears respectively, and a drag frame is threadedly mounted on the two screws. The drag frame is slidably sleeved on the circumferential surface of the floating mounting tube.

[0009] Preferably, a first limiting ring and a second limiting ring are fixed on the circumferential surface of the movable mounting tube and on both sides of the dragging frame, wherein the second limiting ring is in contact with the dragging frame, and an extrusion spring is arranged between the first limiting ring and the dragging frame, and the extrusion spring is wrapped around the circumferential surface of the movable mounting tube.

[0010] Preferably, a pressure nozzle is provided on the fixed installation tube, a pressure pipe is connected to the pressure nozzle, and the pressure pipe is connected to the booster air pump.

[0011] Preferably, an electric-controlled valve is fixedly provided on one side of the middle enclosure away from the air inlet pipe, and the water inlet of the electric-controlled valve is flexibly connected to the end of the floating installation pipe away from the fixed installation pipe through a hose.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention can quickly determine whether there is a gas flow meter leakage problem, and can accurately capture the ripples formed on the surface of the clean water after the bubble bursts, in combination with the illumination lamp and the camera, thereby greatly improving the detection efficiency. The traditional method usually requires 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, so as to significantly improve the production efficiency; (2) While detecting the sealing, the present invention can also accurately control the gas flow through the ball valve and the electric control valve, thereby measuring the sealing performance of the gas flow meter under the dynamic working state. The traditional sealing test is usually only for static conditions, while the present invention can simulate the gas flow state in actual use, provide more real and comprehensive test data, and help improve the reliability and performance of the product; (3) The present invention realizes the automatic clamping and release of the gas flow meter through the design of the drive motor and the linkage gear ring, avoiding the tediousness and errors of manual operation. In addition, the application of the camera and light and shadow capture technology reduces manual intervention in the detection process and improves 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 It is a schematic diagram of the overall internal structure of the present invention.

[0015] Figure 3 It is a structural schematic diagram of the projection plate of the present invention.

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

[0017] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle.

[0018] Figure 6 For the present invention Figure 4 Schematic diagram of the structure at point B in the middle.

[0019] Figure 7 It is a structural schematic diagram of the dragging frame of the present invention.

[0020] In the figure: 101-top cover; 102-middle frame; 103-measuring pool; 104-first shielding plate; 105-second shielding plate; 106-camera; 107-projection board; 108-heat sink; 109-irradiation lamp; 110-air intake pipe; 111-ball valve; 112-one-way flow pipe; 113-blocking core bracket; 114-blocking core; 115-fixed installation pipe; 116-pressure nozzle; 117-pressure nozzle Pressing tube; 118-floating mounting tube; 119-screw arc frame; 120-screw; 121-first limiting ring; 122-extrusion spring; 123-drag frame; 124-second limiting ring; 125-driving gear; 126-driving motor; 127-first supporting side plate; 128-second supporting side plate; 129-linked gear ring; 130-hose; 131-electrically controlled valve; 132-positioning seat; 133-sealing door panel. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-7 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0022] The present invention provides a gas flow meter sealing performance testing system, comprising a measuring water pool 103, a middle enclosure 102 is fixedly and sealedly provided on the measuring water pool 103, a top cover 101 is fixedly and sealedly provided on the middle enclosure 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 sealedly provided on both sides of the inner wall of the middle enclosure 102 and the measuring water pool 103, wherein a camera 106 is fixedly provided on the first shielding plate 104 or the second shielding plate 105 for observing changes in a reflection pattern on the projection plate 107, and a gas flow meter for detecting sealing performance is provided between the first shielding plate 104 and the second shielding plate 105. A heat sink 108 is fixed on the side of the irradiation lamp 109 away from the projection plate 107, and a window is provided on the middle enclosure 102, where a sealing door plate 133 is movably installed, and the sealing door plate 133 is sealed with the window. A one-way flow pipe 112 is fixedly installed on the first shielding plate 104, and the one-way flow pipe 112 is used to connect the air intake pipe 110 and the fixed installation pipe 115, wherein a step hole is provided inside the one-way flow pipe 112, and a blocking core 114 is slidably provided in the step hole through 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 pipe 112, and the blocking core 114 is in contact and sealed with the air intake pipe 110, and the blocking core bracket 113 is in contact and cooperated with the step surface of the step hole on the one-way flow pipe 112 to prevent the blocking core 114 from contacting with the fixed installation pipe 115, and a ball valve 111 is provided in series on the air intake pipe 110. The first supporting side plate 127 and the second supporting side plate 128 are fixedly mounted on the second shielding plate 105, and the floating mounting tube 118 is slidably mounted on the first supporting side plate 127 and the second supporting side plate 128 by means of splines. Flanges are provided on the opposite ends of the floating mounting tube 118 and the fixed mounting tube 115 for installing the gas flow meter required for sealing detection. Two driving gears 125 are symmetrically provided 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, and the two driving gears 125 are meshed and driven by a linkage gear ring 129 rotatably sleeved on the floating mounting tube 118, and one of the driving gears 125 is fixed to the output shaft of the driving motor 126 fixed on the first supporting side plate 127. A screw arc frame 119 is fixed to the bottom surface of the inner wall of the measuring water pool 103, and two parallel and symmetrically arranged screw rods 120 are rotatably mounted on the screw 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.A first stop ring 121 and a second stop ring 124 are fixed on the circumferential surface of the mobile mounting tube 118 on both sides of the drag frame 123, wherein the second stop ring 124 is in contact with the drag frame 123, and a compression spring 122 is arranged between the first stop ring 121 and the drag frame 123, and the compression spring 122 surrounds the circumferential surface of the mobile mounting tube 118. A pressure nozzle 116 is arranged on the fixed mounting tube 115, and a pressure pipe 117 is arranged on the pressure nozzle 116, and the pressure pipe 117 is connected to the booster air pump. An electric control valve 131 is fixedly arranged on one side of the intermediate enclosure 102 away from the air intake pipe 110, and the water inlet of the electric control valve 131 is flexibly connected to the end of the mobile mounting tube 118 away from the fixed mounting tube 115 through a hose 130.

[0023] The working principle of a gas flow meter sealing performance testing system disclosed in the present invention is as follows: a positioning seat 132 is set between the opposite ends of the fixed installation tube 115 and the floating installation tube 118, and a positioning seat 132 of a suitable size is selected according to the outer dimensions of the gas flow meter, and the positioning seat 132 is fixed to the bottom of the measuring water pool 103 (fixed in a manner that is easy to disassemble so that the positioning seat 132 can be replaced). The gas flow meter to be tested 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 at the same time drive the other driving gear 125 to rotate through the linkage gear ring 129. The two driving gears 125 drive the two screw rods 120 to rotate, and then the drag frame 123 can be driven to move axially on the driving gear 125. 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 floating mounting tube 118, so the floating mounting tube 118 will move, so that the floating mounting tube 118 is close to the fixed mounting tube 115, and the two ends of the gas flow meter are clamped (before clamping, a sealing rubber ring needs to be set on the clamping surface to ensure its sealing so that it is more suitable for the actual working scene).

[0024] Close the ball valve 111 and the electric control valve 131, and apply pressure through the fixed mounting tube 115 of the booster air pump box. Since the fixed mounting tube 115, the floating mounting tube 118 and the inside of the gas flow meter are the same, the pressure will also be applied to the gas flow meter. At this time, the gas flow meter can be tested for sealing. Since the gas flow meter is arranged in the measuring water tank 103, and clean water is arranged in the measuring water tank 103, the test needs to wait until the surface of the clean water in the measuring water tank 103 is calm before starting. When the gas flow meter leaks, bubbles will appear on the surface of the gas flow meter, and the bubbles will float to the surface of the clean water and rupture. The ruptured steam drum will form ripples on the surface of the clean water. During the entire test process, the irradiation lamp 109 needs to be started, and the light of the irradiation lamp 109 is irradiated to the surface of the clean water, and part of the light is reflected on the projection board 107, and a uniform light spot is formed on the projection board 107. When ripples are generated, the light spot on the projection board 107 is no longer uniform, and the light spot is in motion, and a light and shadow synchronized with the ripples are formed. The light and shadow can be captured by the camera 106 to determine whether the gas flow meter has a leak. Compared with the traditional sealing test, it can be determined in a short time whether the gas flow meter has a leak problem, so as to quickly find a defective gas flow meter. If the ripples continue, it means that there are always bubbles, which means that the sealing of the gas flow meter is poor.

[0025] In addition, the electric control valve 131 can 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 air intake pipe 110, and also control the flow rate of the gas through the gas flow meter. This method can not only measure the sealing performance of the gas flow meter under actual dynamic conditions, but also drain the water from the fixed installation pipe 115 and the floating installation pipe 118 as well as the gas flow meter during the installation of the gas flow meter (it needs to be selected according to the specific situation, or the clean water in the measuring water pool 103 can be drained before installing the gas flow meter).

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, and the sealing door plate (133) and the window are sealed; wherein a one-way flow tube (112) is fixedly installed on the first shielding plate (104), the one-way flow tube (112) is used to connect the air intake pipe (110) and the fixed installation pipe (115), wherein a step hole is provided inside the one-way flow tube (112), and a blocking core (114) is slidably provided in the step hole through 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), and the blocking core (114) ) is in contact and sealing cooperation with the air intake pipe (110), the blocking core bracket (113) is in contact and cooperation with the step surface of the step hole on the one-way flow pipe (112), so as to prevent the blocking core (114) from contacting with the fixed installation pipe (115), and a ball valve (111) is arranged in series on the air intake pipe (110); wherein the first supporting side plate (127) and the second supporting side plate (128) are fixedly installed on the second baffle plate (105), and the first supporting side plate (127) and the second supporting side plate (128) are slidably installed with a floating installation pipe (118) by means of a spline, and flanges are arranged on the opposite ends of the floating installation pipe (118) and the fixed installation pipe (115) for installing a gas flow meter for detecting the sealing performance.

2. A gas flow meter sealing performance test system according to claim 1, characterized in that: Two driving gears (125) are symmetrically arranged on both sides of the movable mounting tube (118) between the opposing surfaces of the first supporting side plate (127) and the second supporting side plate (128), and the two driving gears (125) are meshed and driven by a linkage gear ring (129) rotatably sleeved on the movable mounting tube (118), wherein 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).

3. A gas flow meter sealing performance testing system according to claim 2, 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).

4. A gas flow meter sealing performance testing system according to claim 3, 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).

5. A gas flow meter sealing performance testing system according to claim 4, 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.

6. A gas flow meter sealing performance testing system according to claim 5, 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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