Flow calibration device for gas operation test bed

Abstract

The utility model relates to a flow calibration device for a gas operation test bed, which belongs to the technical field of gas detection and comprises a conveying pipeline, a detection pipe is arranged at the top of the conveying pipeline, a flow calibrator is inserted into the detection pipe, and a connecting component is arranged between the flow calibrator and the detection pipe. The connecting assembly comprises a sealing pipe fitting connected to the detection pipe in a sleeving mode, limiting rods are fixedly installed on the portions, located on the left side and the right side of the detection pipe, of the conveying pipeline, limiting plates are fixedly connected to the left side and the right side of the sealing pipe fitting, the limiting rods penetrate through the limiting plates, and a clamping ring is fixedly connected to the surface of the flow calibrator. According to the flow calibration device for the gas operation test bed, the threaded rod is driven to rotate by rotating the handle, and due to the fact that the threaded rod is in threaded connection with the threaded pipe and the clamping jaws are limited by the clamping rings, the two clamping jaws are forced to move relatively till the clamping jaws clamp the flow calibration device, and fixing is completed.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, specifically a flow calibration device for a gas operation test bench. Background Technology

[0002] In automotive exhaust emission testing, it is necessary to accurately measure the flow rates of various components in the exhaust gas, such as carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons (HC), and particulate matter (PM). Flow calibration devices ensure the accuracy of flow meters, making emission test results reliable.

[0003] Because the gas delivery pipelines on a gas operation test bench require the installation of a flow calibrator to provide a known and accurate flow standard, calibration ensures the accuracy of flow meter readings used during automotive exhaust gas testing. Existing installation methods typically involve using a handle to connect the flow calibrator via a threaded connection, followed by the application of sealant. This method requires tools, and in confined spaces, tools like wrenches are inconvenient for tightening, impacting work efficiency. Therefore, a flow calibration device for a gas operation test bench is proposed to solve these problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a flow calibration device for a gas operation test bench, which has the advantages of easy installation and improved work efficiency, and solves the problems of needing tools and being inconvenient to use in small spaces.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flow calibration device for a gas operation test bench, comprising a delivery pipe, a detection tube disposed at the top of the delivery pipe, a flow calibrator inserted into the detection tube, and a connecting component disposed between the flow calibrator and the detection tube;

[0006] The connecting assembly includes a sealing tube fitting sleeved on the detection tube. Limiting rods are fixedly installed on both the left and right sides of the delivery pipe and the detection tube. Limiting plates are fixedly connected to both the left and right sides of the sealing tube fitting. The limiting rods pass through the limiting plates. A retaining ring is fixedly connected to the surface of the flow calibrator. A retaining claw is provided on the surface of the flow calibrator between the retaining ring and the sealing tube fitting. A connecting rod is fixedly connected to the back of each of the two retaining claws. A threaded tube is fixedly connected to the end of each of the two connecting rods away from the retaining claws. A threaded rod is threadedly connected to the inner wall of each of the two threaded tubes. A handle is fixedly connected to one end of each threaded rod.

[0007] Furthermore, each of the two claws has a fixed abutment block at its bottom, and the abutment block is inclined at the point where it contacts the limiting plate.

[0008] Furthermore, a thickening block is fixedly connected to the top of each of the two claws, and the top of the thickening block is in contact with the bottom of the retaining ring. The thickening block is a rubber block.

[0009] Furthermore, a limiting piece is fixedly connected to the end of the threaded rod away from the handle, and the threaded rod is parallel to the conveying pipe.

[0010] Furthermore, anti-slip plates are fixedly connected to the side of each of the two claws facing the flow calibrator, and the surface of the anti-slip plates is provided with anti-slip texture.

[0011] Furthermore, the limiting rod is perpendicular to the conveying pipe, and the length of the limiting rod is greater than the length of the sealing pipe.

[0012] Furthermore, the wall thickness of the sealing tube is greater than that of the detection tube, and the bottom of the sealing tube is provided with a fitting groove, the inner wall of which is provided with sealing rubber.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The flow calibration device of this gas operation test bench rotates the threaded rod by turning the handle. Since the threaded rod is connected to the threaded pipe, the jaws are limited by the retaining ring, which forces the two jaws to move relative to each other until the jaws clamp the flow calibrator, thus completing the fixation.

[0015] 2. The flow calibration device used in this gas operation test bench utilizes a clamping block. As the two jaws move, a contact block is fixedly connected to the bottom of each jaw. One side of this contact block is inclined, which applies downward pressure to the sealing pipe connected to the limiting plate, ensuring a tight fit between the sealing pipe and the detection pipe and enhancing the sealing effect. Furthermore, anti-slip plates are connected to the jaws, which clamp the flow calibrator, significantly increasing friction and preventing surface wear on the flow calibrator. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Enlarged view of a partial structure of section A in the middle;

[0018] Figure 3 This is a schematic diagram of the connection structure between the detection tube and the retaining ring of this utility model;

[0019] Figure 4 This is a perspective view of the retaining ring structure of this utility model;

[0020] Figure 5 This utility model Figure 4 Bottom view of the middle ring structure;

[0021] Figure 6 This is a schematic diagram of the connection structure between the conveying pipeline and the detection pipe of this utility model;

[0022] Figure 7 This is a schematic diagram of the connection structure between the claw, the abutment block, and the thickened block of this utility model.

[0023] In the diagram: 1. Delivery pipe, 2. Detection pipe, 3. Flow calibrator, 4. Connecting assembly, 401. Sealing fitting, 402. Limiting rod, 403. Limiting plate, 404. Snap ring, 405. Claw, 406. Connecting rod, 407. Threaded pipe, 408. Threaded rod, 409. Handle, 5. Abutment block, 6. Thickened block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 7 In this embodiment, a flow calibration device for a gas operation test bench includes a delivery pipe 1, a detection tube 2 is provided at the top of the delivery pipe 1, a flow calibrator 3 is inserted into the detection tube 2, and a connecting component 4 is provided between the flow calibrator 3 and the detection tube 2.

[0026] The connecting assembly 4 includes a sealing tube 401 sleeved on the detection tube 2. The wall thickness of the sealing tube 401 is greater than that of the detection tube 2, and a fitting groove is provided at the bottom of the sealing tube 401. The inner wall of the fitting groove is provided with sealing rubber. The surface of the detection tube 2 is tightly fitted with the fitting groove. Limiting rods 402 are fixedly installed on both the left and right sides of the conveying pipe 1 and the detection tube 2. The limiting rods 402 are perpendicular to the conveying pipe 1, and the length of the limiting rods 402 is greater than the length of the sealing tube 401. Limiting plates 403 are fixedly connected to both the left and right sides of the sealing tube 401, and the limiting rods 402 penetrate the limiting plates. A retaining ring 404 is fixedly connected to the surface of the flow calibrator 3. A claw 405 is provided on the surface of the flow calibrator 3 between the retaining ring 404 and the sealing pipe 401. A connecting rod 406 is fixedly connected to the back of each claw 405. A threaded pipe 407 is fixedly connected to the end of each connecting rod 406 away from the claw 405. A threaded rod 408 is threadedly connected to the inner wall of each threaded pipe 407. A handle 409 is fixedly connected to one end of the threaded rod 408. A limit piece is fixedly connected to the end of the threaded rod 408 away from the handle 409. The threaded rod 408 is parallel to the conveying pipe 1.

[0027] First, move the two claws 405 in the opposite direction to connect the sealing tube 401 to the detection tube 2. Then, insert the flow calibrator 3 from the sealing tube 401 into the gas pipeline 1. After that, the handle 409 can be rotated.

[0028] By rotating the handle 409, the threaded rod 408 is driven to rotate. Since the threaded rod 408 is threadedly connected to the threaded tube 407, and the pawl 405 is limited by the retaining ring 404, the two pawls 405 are forced to move relative to each other until the pawls 405 clamp the flow calibrator 3, thereby completing the fixation.

[0029] The bottom of each of the two claws 405 is fixedly connected to an abutment block 5, and the abutment block 5 is inclined at the point where it fits against the limiting plate 403. The top of each of the two claws 405 is fixedly connected to a thickening block 6, and the top of the thickening block 6 fits against the bottom of the retaining ring 404. The thickening block 6 is a rubber block. Anti-slip plates are fixedly connected to the side of each of the two claws 405 facing the flow calibrator 3, and the surface of the anti-slip plates is provided with anti-slip texture.

[0030] As the two jaws 405 move, the bottom of the jaws 405 is fixedly connected to the abutment block 5, one side of which is inclined. This applies downward pressure to the sealing pipe 401 connected to the limiting plate 403, achieving a tight fit between the sealing pipe 401 and the detection pipe 2, thus increasing the sealing effect. Furthermore, anti-slip plates are connected to the jaws 405, which clamp the flow calibrator 3, greatly increasing friction and preventing surface wear of the flow calibrator 3.

[0031] The working principle of the above embodiments is as follows:

[0032] First, move the two jaws 405 in a disjointed direction to connect the sealing fitting 401 to the detection tube 2. Then, insert the flow calibrator 3 into the gas pipeline 1 through the sealing fitting 401. Next, rotate the handle 409. Rotating the handle 409 will drive the threaded rod 408 to rotate. Since the threaded rod 408 is threadedly connected to the threaded tube 407, and the jaws 405 are limited by the retaining ring 404, the two jaws 405 are forced to move relative to each other. During the movement of the two jaws 405, since the bottom of the jaws 405 is fixedly connected to the abutment block 5, and one side of the abutment block 5 is inclined, it will press down on the sealing fitting 401 connected to the limiting plate 403, so that the sealing fitting 401 and the detection tube 2 are tightly fitted, increasing the sealing effect, until the jaws 405 clamp the flow calibrator 3, thus completing the fixation. Therefore, in a confined space, rotating the handle 409 can easily complete the installation of the flow calibrator 3, which facilitates its use.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flow calibration device for a gas-operated test stand comprising a delivery conduit, characterized in that: The top of the conveying pipeline is provided with a detection pipe, a flow calibrator is inserted into the detection pipe, and a connecting assembly is arranged between the flow calibrator and the detection pipe; The connecting assembly comprises a sealing pipe fitting sleeved on the detection pipe, limit rods are fixedly installed on the left and right sides of the conveying pipeline and located on the left and right sides of the detection pipe, limit plates are fixedly connected to the left and right sides of the sealing pipe fitting, the limit rods penetrate through the limit plates, and snap rings are fixedly connected to the surface of the flow calibrator; Claws are arranged on the surface of the flow calibrator and located between the snap rings and the sealing pipe fitting, connecting rods are fixedly connected to the back surfaces of the two claws, threaded pipes are fixedly connected to the ends, away from the claws, of the two connecting rods, threaded rods are screw-connected to the inner walls of the two threaded pipes, and handles are fixedly connected to one end of the threaded rods.

2. A flow calibration device for a gas-operated test stand according to claim 1, characterized in that The bottom of each of the two claws is fixedly connected to an abutting block, and the abutting block is inclined at the abutting position with the limit plate.

3. A flow calibration device for a gas-operated test stand according to claim 2, characterized in that: The top of each of the two claws is fixedly connected to a thickened block, the top of the thickened block is abutted with the bottom of the snap ring, and the thickened block is a rubber block.

4. A flow calibration device for a gas-operated test stand according to claim 1, characterized in that: The end, away from the handle, of the threaded rod is fixedly connected to a limit sheet, and the threaded rod is parallel to the conveying pipeline.

5. A flow calibration device for a gas-operated test stand according to claim 1, characterized in that: The side, facing the flow calibrator, of each of the two claws is fixedly connected to an anti-skid sheet, and anti-skid lines are formed on the surface of the anti-skid sheet.

6. A flow calibration device for a gas-operated test stand according to claim 1, characterized in that: The limit rod is perpendicular to the conveying pipeline, and the length of the limit rod is greater than the length of the sealing pipe fitting.

7. A flow calibration device for a gas-operated test stand according to claim 1, characterized in that: The wall thickness of the sealing pipe fitting is greater than the wall thickness of the detection pipe, and a fitting groove is formed in the bottom of the sealing pipe fitting, and a sealing rubber is arranged on the inner wall of the fitting groove.

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