Simulation test device for gas ultrasonic flowmeter

Abstract

The invention provides a simulation test device for a gas ultrasonic flowmeter. The simulation test device for the gas ultrasonic flowmeter comprises a gas inlet cylinder, a gas outlet cylinder, a base, a communicating assembly and a pushing part. The air inlet cylinder is arranged, the air inlet cylinder is installed on the ground, the air outlet cylinder is further installed above the air inlet cylinder, and the air outlet cylinder and the air inlet cylinder are coaxially arranged. A base is arranged on one side of the air outlet cylinder, a rotary disc is rotationally arranged on the base, a plurality of communicating assemblies are installed on the rotary disc, the communicating assemblies are slidably arranged on the rotary disc in the vertical direction, and the communicating assemblies can be driven to the air inlet cylinder and the air outlet cylinder through rotation of the rotary disc; and the flow meter on the communication component is respectively communicated with the air inlet cylinder and the air outlet cylinder through the downward movement of the air outlet cylinder. When the flow meter between the air inlet cylinder and the air outlet cylinder is tested, the flow meter can be disassembled and assembled on the other communication assemblies, and the test of the current flow meter is not influenced; therefore, the testing efficiency of the flowmeter is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of flow meter testing equipment, and in particular relates to a gas ultrasonic flow meter simulation testing device. Background Art

[0002] A gas ultrasonic flowmeter is an instrument used to measure gas flow. It uses the principle of sound velocity difference in ultrasonic propagation to calculate the gas velocity and flow rate by measuring the sound velocity difference between the forward and reverse propagation of ultrasonic airflow. Before leaving the factory, a gas ultrasonic flowmeter needs to be randomly selected for simulated use testing to detect the accuracy of the gas ultrasonic flowmeter during normal use and the stability during operation. The current testing method usually requires the gas ultrasonic flowmeter to be installed on the gas transmission pipeline, and the gas is quantitatively delivered to the inside of the gas pipeline to observe whether the value of the gas ultrasonic flowmeter is within a reasonable error range. However, when using this method, when testing multiple gas ultrasonic flowmeters, the test needs to be stopped when the gas ultrasonic flowmeter is disassembled and assembled. The next round of testing can only be carried out after the new gas ultrasonic flowmeter is installed. This results in a long time in the batch testing process and low test efficiency. Summary of the Invention

[0003] An embodiment of the present invention provides a gas ultrasonic flowmeter simulation test device, which aims to solve the problem of low test efficiency of gas ultrasonic flowmeters in the prior art during batch simulation tests.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a gas ultrasonic flowmeter simulation test device, comprising:

[0005] The air intake cylinder has its axis arranged in the vertical direction;

[0006] An outlet pipe is installed above the air inlet pipe and is coaxially arranged with the air inlet pipe;

[0007] A base is mounted on one side of the air inlet cylinder, and a turntable is rotatably provided on the base;

[0008] a plurality of connecting components, each of which is evenly spaced along the circumference of the turntable and slidably disposed on the turntable in a vertical direction, and is used to connect the two ends of the flow meter with the air inlet and the air outlet, respectively;

[0009] A pushing member, whose driving end is connected to the air outlet, is used to push the air outlet to move in a direction close to the air inlet.

[0010] In a possible implementation, the connectivity component includes:

[0011] A sliding frame is slidably arranged on the turntable in a vertical direction, and a lower tray detachably connected to one end of the flow meter is installed on the sliding frame;

[0012] An upper pressure plate is slidably arranged on the sliding frame in a vertical direction and is located above the lower tray, and is used to connect to the other end of the flow meter;

[0013] An elastic member is installed between the sliding frame and the rotating disk, and is used to push the sliding frame to move upward.

[0014] In one possible implementation, a first convex ring and a second convex ring for connecting with the two ends of the flow meter are fixedly installed on the lower tray and the upper pressure plate respectively, and sealing rings are installed on the outer sides of the first convex ring and the second convex ring, and the first convex ring can slide into the interior of the air inlet tube, and the second convex ring can slide into the interior of the air outlet tube.

[0015] In one possible implementation, the upper pressure plate can slide out from the top of the sliding frame, the lower tray can slide out from the bottom of the sliding frame, and a support frame for supporting the lower tray is installed under the turntable, and the support frame is slidably arranged on the base along the vertical direction.

[0016] In a possible implementation, a convex rib is protruding from the outer surface of the base, and a guide groove that slidably cooperates with the convex rib is provided on the support frame.

[0017] In a possible implementation, the support frame includes a plurality of support arms corresponding to the lower tray, and a positioning assembly for positioning the lower tray is provided on the support arms.

[0018] In one possible implementation, the positioning assembly includes a U-shaped groove located at the end of the support arm, a positioning column is fixedly mounted on the lower tray and slides with the U-shaped groove, and an anti-rotation block is also mounted on the support arm to prevent the lower tray from rotating inside the U-shaped groove, and an anti-rotation edge is correspondingly provided on the lower tray.

[0019] In a possible implementation, the anti-rotation block is provided with a slot for clamping the lower tray, and the position of the anti-rotation block on the support arm has the freedom to be adjusted along the length direction of the U-shaped slot.

[0020] In one possible implementation, a swing rod is hingedly provided on the base, a support rod is hingedly provided on the support frame, the other end of the support rod is hingedly provided on the middle part of the swing rod, a connecting rod is hingedly provided on the anti-rotation block, and the connecting rod is hingedly provided on the end of the swing rod away from the base.

[0021] In a possible implementation, the connecting rod is a rod body with adjustable length.

[0022] Compared to the prior art, the solution shown in the embodiment of the present application comprises an air inlet mounted on the ground, and an air outlet mounted above the air inlet, coaxially arranged with the air inlet. A mounting bracket for a pusher is also fixedly mounted on the ground, with the fixed end of the pusher mounted on the mounting bracket and the driving end of the pusher fixedly connected to the air outlet. A base is provided on one side of the air outlet, on which a turntable is rotatably mounted. Multiple connecting assemblies are mounted on the turntable, and the connecting assemblies slide vertically on the turntable, allowing flowmeters to be mounted on the connecting assemblies. The turning of the turntable drives the connecting assemblies to the air inlet and air outlet, and the downward movement of the air outlet connects the flowmeters on the connecting assemblies to the air inlet and air outlet, respectively. While testing the flowmeter located between the air inlet and air outlet, the flowmeters can be removed and installed from the remaining connecting assemblies without affecting the testing of the current flowmeter. This can effectively improve the testing efficiency of the flowmeters during batch simulation testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a gas ultrasonic flowmeter simulation test device provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a connectivity component provided in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the installation structure of the support frame provided in an embodiment of the present invention;

[0026] Figure 4 for Figure 3 A partial enlarged view of part A in the middle.

[0027] Description of reference numerals:

[0028] 1. Air inlet; 2. Air outlet; 3. Base; 31. Raised rib; 4. Turntable; 5. Connecting assembly; 51. Sliding frame; 52. Lower tray; 521. First raised ring; 522. Second raised ring; 53. Upper pressure plate; 54. Elastic member; 55. Sealing ring; 6. Pushing member; 7. Support frame; 71. Support arm; 8. Anti-rotation block; 81. Swing rod; 82. Support rod; 83. Connecting rod. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] Please also refer to Figures 1 to 4 , the gas ultrasonic flowmeter simulation test device provided by the present invention is now described. The gas ultrasonic flowmeter simulation test device includes an air inlet cylinder 1, an air outlet cylinder 2, a base 3, a turntable 4, a connecting component 5 and a pushing member 6. The axis of the air inlet cylinder 1 is arranged in the vertical direction; the air outlet cylinder 2 is installed above the air inlet cylinder 1 and is coaxial with the air inlet cylinder 1; the base 3 is installed on one side of the air inlet cylinder 1, and a turntable 4 is rotatably arranged on the base 3; there are multiple connecting components 5, and the multiple connecting components 5 are evenly spaced along the circumference of the turntable 4 on the turntable 4, and the connecting components 5 are slidably arranged on the turntable 4 along the vertical direction, and the connecting components 5 are used to connect the two ends of the flowmeter with the air inlet cylinder 1 and the air outlet cylinder 2 respectively; the driving end of the pushing member 6 is connected to the air outlet cylinder 2, and is used to push the air outlet cylinder 2 to move in the direction close to the air inlet cylinder 1.

[0031] Compared with the prior art, the gas ultrasonic flowmeter simulation test device provided in this embodiment is provided with an air inlet cylinder 1, which is installed on the ground, and an air outlet cylinder 2 is also installed above the air inlet cylinder 1, and the air outlet cylinder 2 is coaxially arranged with the air inlet cylinder 1. A mounting bracket for a pusher 6 is also fixedly installed on the ground, the fixed end of the pusher 6 is installed on the mounting bracket, and the driving end of the pusher 6 is fixedly connected to the air outlet cylinder 2. A base 3 is provided on one side of the air outlet cylinder 2, and a turntable 4 is rotatably provided on the base 3. A plurality of connecting components 5 are installed on the turntable 4, and the connecting components 5 are slidably provided on the turntable 4 in the vertical direction, so that the flowmeter can be installed on the connecting component 5. The connecting component 5 can be driven to the air inlet cylinder 1 and the air outlet cylinder 2 by the rotation of the turntable 4, and the flowmeter on the connecting component 5 can be connected to the air inlet cylinder 1 and the air outlet cylinder 2 respectively by the downward movement of the air outlet cylinder 2. When testing the flow meter located between the air inlet pipe 1 and the air outlet pipe 2, the flow meter can be disassembled and installed on the remaining connecting components 5 without affecting the test of the current flow meter; during the batch simulation test process, the test efficiency of the flow meter can be effectively improved.

[0032] Specifically, in this embodiment, a flow control valve and a flow meter are provided on the air inlet 1, so as to adjust the flow rate of the air inlet and monitor the air flow rate. A flow meter for monitoring the outlet flow is installed on the air outlet 2.

[0033] In some embodiments, the communication component 5 may be configured as follows: Figure 1 、 Figure 2 See also Figure 1 、 Figure 2The connecting assembly 5 includes a sliding frame 51, an upper pressure plate 53, a lower tray 52, and an elastic member 54. The sliding frame 51 is slidably mounted on the turntable 4 in the vertical direction. The sliding frame 51 is equipped with a lower tray 52 that is detachably connected to one end of the flowmeter. The upper pressure plate 53 is slidably mounted on the sliding frame 51 in the vertical direction and is located above the lower tray 52 for connecting to the other end of the flowmeter. The elastic member 54 is installed between the sliding frame 51 and the turntable 4 to push the sliding frame 51 upward. The sliding frame 51 includes four guide posts that are slidably mounted on the turntable 4 in the vertical direction. A limit platform is protruded from the guide posts, and the outer diameter of the limit platform is larger than that of the guide posts. The elastic member 54 is a spring that is mounted on the outer side of the guide posts. One end of the elastic member 54 rests on the top surface of the turntable 4, and the other end rests on the limit platform. The upper pressure plate 53 also rests on the top surface of the limit platform.

[0034] Specifically, in this embodiment, in the free state, the elastic member 54 can provide a certain degree of support for the overall height of the connecting assembly 5. When the connecting assembly 5 moves to the position of the air inlet 1 and the air outlet 2, the pushing member 6 presses down the air outlet 2, which acts on the upper pressure plate 53 and drives the flow meter and the lower tray 52 to move downward, thereby achieving communication between the upper pressure plate 53 and the air outlet 2, and between the lower tray 52 and the air inlet 1. After the test is completed, the pushing member 6 drives the air outlet 2 to retract and move upward. Under the action of the elastic member 54, the connecting assembly 5 moves upward as a whole, thereby preventing the connecting assembly 5 from interfering with the air outlet 2 and the air inlet 1 during the rotation of the turntable 4.

[0035] Specifically, in this embodiment, sealing rings that are sealed to the flow meter are provided on both the upper pressure plate 53 and the lower tray 52. When the two ends of the flow meter are against between the upper pressure plate 53 and the lower tray 52, the sealing rings can be used to achieve a sealed connection between the flanges at both ends of the flow meter and the upper pressure plate 53 and the lower tray 52.

[0036] In some embodiments, the lower tray 52 may be formed as follows: Figure 2 The structure shown. Figure 2A first convex ring 521 and a second convex ring 522 for communicating with the two ends of the flowmeter are fixedly mounted on the lower tray 52 and the upper pressure plate 53, respectively. A sealing ring 55 is mounted on the outer side of each of the first convex ring 521 and the second convex ring 522. The first convex ring 521 can slide into the interior of the air inlet cylinder 1, and the second convex ring 522 can slide into the interior of the air outlet cylinder 2. The first convex ring 521 is slidably mounted inside the air inlet cylinder 1, and the sealing ring 55 is sleeved on the outer side of the first convex ring 521. When the first convex ring 521 slides into the interior of the air inlet cylinder 1, a sealed connection between the air inlet cylinder 1 and the first convex ring 521 is achieved. The second convex ring 522 is slidably mounted inside the air outlet cylinder 2, and the sealing ring 55 is sleeved on the outer side of the second convex ring 522. When the second convex ring 522 slides into the interior of the air outlet cylinder 2, a sealed connection between the air outlet cylinder 2 and the second convex ring 522 is achieved.

[0037] Specifically, in this embodiment, the flanges at the air inlet and air outlet ends of the flowmeter are fixedly mounted on the first convex ring 521 and the second convex ring 522, respectively, and a sealing ring is used to achieve a sealed connection between the first convex ring 521 and the second convex ring 522. When the pusher 6 pushes the air outlet cylinder 2 downward, the first convex ring 521 on the lower tray 52 and the second convex ring 522 on the upper pressure plate 53 slide into the interior of the air inlet cylinder 1 and the air outlet cylinder 2, respectively, thereby achieving communication between the flowmeter and the air inlet cylinder 1 and the air outlet cylinder 2. The operation process does not require the use of bolts for fixing, which is simple to operate and saves time in connecting the flowmeter with the air inlet cylinder 1 and the air outlet cylinder 2.

[0038] In some embodiments, the upper platen 53 and the lower tray 52 may be formed as follows: Figure 1 、 Figure 3 See also Figure 1 、 Figure 3 The upper platen 53 can slide out from the top of the sliding frame 51, and the lower tray 52 can slide out from the bottom of the sliding frame 51. A support frame 7 for supporting the lower tray 52 is installed below the turntable 4. The support frame 7 is slidably mounted on the base 3 in the vertical direction. Guide sleeves that slide with the guide posts are provided on both the upper platen 53 and the lower tray 52, and can be mounted on the guide posts at their upper and lower ends, respectively. The upper platen 53 can rest against the guide post's limit table, and the lower tray 52 is supported by the support frame 7, ensuring the stability of the lower tray 52's installation position when the flow meter is not installed.

[0039] Specifically, in this embodiment, when installing the flowmeter between the upper platen 53 and the lower tray 52, the support frame 7 is lowered to its lowest position, and the lower tray 52 is then placed on the support frame 7. The flowmeter's air inlet is placed on the lower tray 52, and the flange at the flowmeter's air inlet is secured to the lower tray 52 using bolts and nuts. The support frame 7 then moves upward, driving the flowmeter upward, causing the flange at the flowmeter's air outlet to rest against the upper platen 53. Bolts and nuts are then used to secure the upper platen 53 to the flange at the flowmeter's air outlet. This achieves the connection between the flowmeter, the upper platen 53, and the lower tray 52. The structure is simple and easy to install and disassemble.

[0040] Preferably, in this embodiment, screws corresponding to the bolt holes on the flange of the flow meter's air inlet end are fixedly mounted on the lower tray 52 to avoid interference between the support frame 7 and the bolts and affecting the connection between the lower tray 52 and the flow meter.

[0041] In this embodiment, the upper pressure plate 53 and the lower tray 52 can be slid out from the sliding frame 51, and the upper pressure plate 53 and the lower tray 52 of different specifications can be replaced during testing according to the flow meters of different specifications. During the replacement process, there is no need to use the disassembly and assembly method of bolts, and the operation method is simpler and the operation process is more convenient.

[0042] Specifically, in this embodiment, a hydraulic cylinder for adjusting the height of the support frame 7 is also installed on the base 3. The support frame 7 is driven to move up and down on the base 3 by the hydraulic cylinder.

[0043] In some embodiments, the support frame 7 can be used as follows Figure 1 、 Figure 3 See also Figure 1 、 Figure 3 The outer surface of the base 3 is provided with a protruding rib 31, and the support frame 7 is provided with a guide groove that slides with the rib 31. The base 3 includes a bottom plate for fixing to the ground, on which a sleeve is fixedly mounted with its axis arranged in the vertical direction. The support frame 7 includes a sleeve that is slidably mounted on the outer side of the sleeve, and a plurality of ribs 31 are fixedly mounted on the outer wall of the sleeve. The length direction of the plurality of ribs 31 is arranged in the vertical direction. The inner wall of the sleeve is provided with a guide groove that slides with the rib 31. Therefore, when the support frame 7 slides up and down, it can prevent the support frame 7 from rotating along the axis of the sleeve, thereby ensuring the stability of the position of the support frame 7.

[0044] Specifically, in this embodiment, a turntable 4 is rotatably mounted on the top of a sleeve. A gear ring is coaxially mounted on the bottom of the turntable 4. A gear is rotatably mounted on the sleeve and meshes with the gear ring. A motor is also fixedly mounted on the sleeve to drive the gear. A sensor is also mounted on the base 3 to sense the position of the turntable 4. The sensor transmits signals to a controller, which controls the motor's operating state. The specific control method is conventional and will not be elaborated here.

[0045] In some embodiments, the support frame 7 can be used as follows Figure 3 The structure shown. Figure 3 The support frame 7 includes a plurality of support arms 71 corresponding to the lower tray 52, and the support arms 71 are provided with a positioning assembly for locating the position of the lower tray 52. There are multiple support arms 71. Except for the air inlet tube 1 and the air outlet tube 2, support arms 71 are provided at the positions of the other sliding frames 51, so that the disassembly and assembly of flow meters at multiple stations can be realized. The support arms 71 are provided with a positioning assembly for positioning the lower tray 52. When the lower tray 52 is installed on the support arms 71, the position of the lower tray 52 can be located by the positioning assembly. Therefore, when the support arms 71 drive the lower tray 52 to move upward, the relative position between the lower tray 52 and the sliding frame 51 can be guaranteed.

[0046] Preferably, in this embodiment, when the support frame 7 moves to the bottom, the height of the support arm 71 is always lower than the height of the sliding frame 51. This can prevent the support arm 71 from interfering with the sliding frame 51 and affecting the rotation of the turntable 4 during the rotation of the turntable 4.

[0047] In some embodiments, the positioning assembly may be configured as follows: Figure 3 The structure shown. Figure 3 The positioning assembly includes a U-shaped groove at the end of the support arm 71. A positioning post that slides with the U-shaped groove is fixedly mounted on the lower tray 52. An anti-rotation block 8 is also mounted on the support arm 71 to prevent the lower tray 52 from rotating within the U-shaped groove. A corresponding anti-rotation edge is provided on the lower tray 52. The length direction of the support arm 71 is arranged along the radial direction of the sleeve. A U-shaped groove is provided at the end of the support arm 71 away from the sleeve. The positioning post on the lower tray 52 is a first protruding ring 521. The first protruding ring 521 slides with the inner wall of the U-shaped groove to achieve the positioning of the first protruding ring 521. An anti-rotation block 8 is also mounted on the support arm 71. The anti-rotation edge on the lower tray 52 can abut against the anti-rotation block 8, thereby achieving the positioning of the lower tray 52. When the support frame 7 moves upward, the guide post can slide into the corresponding guide sleeve on the lower tray 52.

[0048] Specifically, in this embodiment, the anti-rotation block 8 can limit the position of the lower tray 52 along the radial direction of the sleeve and prevent the lower tray 52 from rotating on the support arm 71. During use, the operator can place the lower tray 52 within the U-shaped groove and push the lower tray 52 so that the anti-rotation edge of the lower tray 52 abuts against the anti-rotation block 8 to position the lower tray 52. The operator then activates the support arm 71 to move upward, connecting the lower tray 52 to the sliding frame 51. Finally, the lower tray 52 is connected to the upper pressure plate 53 via the flow meter. The provision of the support arm 71 and the positioning assembly facilitates the installation of the lower tray 52 and the flow meter.

[0049] In some embodiments, the anti-rotation block 8 may be formed as follows: Figure 3 The structure shown. Figure 3 , the anti-rotation block 8 is provided with a slot for clamping the lower tray 52, and the position of the anti-rotation block 8 on the support arm 71 has the freedom to adjust along the length direction of the U-shaped groove. The anti-rotation block 8 is provided with a slot for clamping the lower tray 52. When installing the lower tray 52, the lower tray 52 can be slid into the slot, further improving the stability of the installation position of the lower tray 52. At the same time, the position of the anti-rotation block 8 on the support arm 71 can be moved along the radial direction of the sleeve. When the support frame 7 moves to the bottom, the anti-rotation block 8 is located in the working position, which plays a role in positioning the lower tray 52. When the support frame 7 moves upward, the anti-rotation block 8 moves in the direction close to the axis of the sleeve, so that the anti-rotation block 8 is separated from the lower tray 52, avoiding affecting the rotation of the turntable 4 in the later stage.

[0050] Specifically, in this embodiment, a limit platform for supporting the support frame 7 is provided on the base. The limit platform is located below the support frame 7 and can limit the support frame 7 when it moves to the lowest point. This ensures the stability of the position of the support frame 7 when it moves to the lowest point.

[0051] In some embodiments, the anti-rotation block 8 may be formed as follows: Figure 3 、 Figure 4 See also Figure 3 、 Figure 4 A swinging rod 81 is hingedly provided on the base 3, a supporting rod 82 is hingedly provided on the supporting frame 7, the other end of the supporting rod 82 is hingedly provided at the middle portion of the swinging rod 81, and a connecting rod 83 is hingedly provided on the anti-rotation block 8. The connecting rod 83 is hingedly provided at the end of the swinging rod 81 away from the base 3. One end of the swinging rod 81 is hingedly provided on the base 3, and a clearance groove for avoiding the swinging rod 81 is provided on the sleeve of the supporting frame 7. A supporting rod 82 is hingedly provided at the middle portion of the swinging rod 81, the other end of the supporting rod 82 is hingedly provided on the supporting frame 7. A connecting rod 83 is hingedly provided at the other end of the swinging rod 81, the other end of the connecting rod 83 is hingedly provided at the bottom of the anti-rotation block 8.

[0052] Specifically, in this embodiment, when the support frame 7 moves downward, the swing arm 81 swings downward under the action of the support rod 82, and drives the anti-rotation block 8 outward via the connecting rod 83. When the support frame 7 moves upward, the anti-rotation block 8 moves inward. Thus, after the support frame 7 is positioned, the anti-rotation block 8 can automatically disengage from the lower tray 52 during the upward movement of the support frame 7.

[0053] Preferably, in this embodiment, when the anti-rotation edge of the lower tray 52 abuts the anti-rotation block 8, the first protruding ring 521 of the lower tray 52 abuts the inner wall of the upper arcuate portion of the U-shaped groove. Thus, even after the anti-rotation block 8 is released from the lower tray 52, the arcuate portion of the U-shaped groove can still be used to position the lower tray 52. This also prevents the anti-rotation block 8 from causing displacement of the lower tray 52 as it moves inward.

[0054] In some embodiments, the connecting rod 83 may be Figure 4 The structure shown. Figure 4 The connecting rod 83 is a rod with adjustable length. By adjusting the length of the connecting rod 83, the initial position of the anti-rotation block 8 can be adjusted when the support frame 7 moves to the lowest position. This ensures the stability of the positioning position of the lower tray 52.

[0055] Specifically, in this embodiment, the connecting rod 83 comprises a first screw, a second screw, and a threaded sleeve. The outer threads of the first and second screws have opposite rotation directions. The first and second screws are respectively threadedly connected to the threaded sleeves. Thus, the relative position of the first and second screws can be adjusted by rotating the threaded sleeves. This simple structure facilitates adjustment of the position of the anti-rotation block 8.

[0056] Preferably, in this embodiment, a tightening member is threadedly connected to the first screw rod and the second screw rod, and the tightening member is used to abut against the end of the threaded sleeve to ensure the stability of the relative position of the first screw rod and the second screw rod.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas ultrasonic flowmeter simulation test device, characterized in that: include: The air intake cylinder (1) has an axis arranged in a vertical direction; An air outlet cylinder (2) is installed above the air inlet cylinder (1) and is coaxially arranged with the air inlet cylinder (1); A base (3) is mounted on one side of the air inlet cylinder (1), and a turntable (4) is rotatably provided on the base (3); a plurality of connecting components (5), the plurality of connecting components (5) being evenly spaced along the circumference of the turntable (4) and arranged on the turntable (4), and the connecting components (5) being slidably arranged on the turntable (4) along the vertical direction, and the connecting components (5) being used to connect the two ends of the flow meter with the air inlet cylinder (1) and the air outlet cylinder (2), respectively; A pushing member (6), a driving end of which is connected to the air outlet cylinder (2), is used to push the air outlet cylinder (2) to move in a direction close to the air inlet cylinder (1).

2. The gas ultrasonic flowmeter simulation test device according to claim 1, characterized in that: The communication component (5) comprises: A sliding frame (51) is slidably arranged on the turntable (4) in a vertical direction, and a lower tray (52) detachably connected to one end of the flow meter is installed on the sliding frame (51); An upper pressure plate (53) is slidably arranged on the sliding frame (51) in a vertical direction and is located above the lower tray (52) for connecting to the other end of the flow meter; An elastic member (54) is installed between the sliding frame (51) and the rotating disk (4) and is used to push the sliding frame (51) to move upward.

3. The gas ultrasonic flowmeter simulation test device according to claim 2, characterized in that: A first convex ring (521) and a second convex ring (522) for communicating with both ends of the flow meter are fixedly mounted on the lower tray (52) and the upper pressure plate (53), respectively. A sealing ring (55) is mounted on the outer sides of the first convex ring (521) and the second convex ring (522), and the first convex ring (521) can slide into the interior of the air inlet cylinder (1), and the second convex ring (522) can slide into the interior of the air outlet cylinder (2).

4. The gas ultrasonic flowmeter simulation test device according to claim 2, characterized in that: The upper pressure plate (53) can slide out from the top of the sliding frame (51), and the lower tray (52) can slide out from the bottom of the sliding frame (51), and a support frame (7) for supporting the lower tray (52) is installed below the turntable (4), and the support frame (7) is slidably arranged on the base (3) in a vertical direction.

5. The gas ultrasonic flowmeter simulation test device according to claim 4, characterized in that: A convex rib (31) is protruding from the outer surface of the base (3), and a guide groove that is slidably matched with the convex rib (31) is provided on the support frame (7).

6. The gas ultrasonic flowmeter simulation test device according to claim 4, characterized in that: The support frame (7) comprises a plurality of support arms (71) corresponding to the lower tray (52), and a positioning assembly for positioning the lower tray (52) is provided on the support arms (71).

7. The gas ultrasonic flowmeter simulation test device according to claim 6, characterized in that: The positioning assembly includes a U-shaped groove located at the end of the support arm (71), a positioning column that slides with the U-shaped groove is fixedly installed on the lower tray (52), and an anti-rotation block (8) for preventing the lower tray (52) from rotating inside the U-shaped groove is also installed on the support arm (71), and an anti-rotation edge is correspondingly provided on the lower tray (52).

8. The gas ultrasonic flowmeter simulation test device according to claim 7, characterized in that: The anti-rotation block (8) is provided with a slot for clamping the lower tray (52), and the position of the anti-rotation block (8) on the support arm (71) has the freedom to be adjusted along the length direction of the U-shaped slot.

9. The gas ultrasonic flowmeter simulation test device according to claim 8, characterized in that: A swing rod (81) is hingedly provided on the base (3), a support rod (82) is hingedly provided on the support frame (7), the other end of the support rod (82) is hingedly provided at the middle of the swing rod (81), a connecting rod (83) is hingedly provided on the anti-rotation block (8), and the connecting rod (83) is hingedly provided to the end of the swing rod (81) away from the base (3).

10. The gas ultrasonic flowmeter simulation test device according to claim 9, characterized in that: The connecting rod (83) is a rod body with adjustable length.

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