Pneumatic detection platform for inner diameter dimension of stainless steel pipe

Abstract

The utility model discloses a stainless steel pipe inner diameter size pneumatic detection platform, which comprises a starting measuring instrument, a detection platform group and a driving disc, and is characterized in that the detection platform group comprises a fixed seat, a bearing platform seat and a plurality of clamping jaws; a plurality of vertical frames are fixedly installed on the surface of the fixing base, the clamping jaws are installed on the surfaces of the vertical frames through rotating structures, and supporting screws are installed on the surfaces of the clamping jaws in a threaded mode. The bearing platform base is fixed to the surface of the fixing base. The driving disc is rotationally installed on the inner side of the bearing platform base, limiting grooves matched with the guide pins are formed in the surface of the driving disc, a guide inclined face and an expansion face are arranged on the periphery of the driving disc, the surfaces of the guide inclined face and the expansion face abut against the end of the supporting screw in a sliding mode, and an operation rod is fixedly connected to the bottom face of the driving disc. Through rotation and sliding of the driving disc, the supporting screw rod expands or contracts in the radial direction under the guidance of the guide inclined face and the expansion face, the clamping jaws are driven to conduct clamping or loosening synchronously, and therefore automatic positioning and centering of stainless steel pipes of different specifications and diameters are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring instrument technical field, concretely is a stainless steel pipe inner diameter size pneumatic detection platform. BACKGROUND

[0002] In the industrial production and processing process, stainless steel pipe because its excellent corrosion resistance, high strength and wide application field, become common pipeline material. However, the machining precision of stainless steel pipe has important influence to its connection, sealing and strength etc. performance in actual use, especially in petroleum, chemical industry, aerospace, medicine etc. field, the inner diameter size precision requirement of stainless steel pipe is extremely high.

[0003] The existing stainless steel pipe inner diameter detection method mainly includes the following several:

[0004] Plug gauge method: through the plug gauge of different specifications is inserted into the inner wall of stainless steel pipe, utilizes the insertion intensity and insertion depth to judge whether the inner diameter of stainless steel pipe meets the tolerance requirement. However, this method has the following problems: the detection result depends on the manual feeling of operator, and there is a large subjective error; The specification of plug gauge has certain limitation, and cannot meet the detection demand of non-standard size stainless steel pipe; The insertion intensity can cause damage to the inner wall of stainless steel pipe, and affect the product performance.

[0005] Inner diameter micrometer method: utilize mechanical micrometer or electronic micrometer to directly measure the inner diameter of stainless steel pipe. Although the inner diameter micrometer method can provide higher precision, but has the following shortcomings: this method needs to fix stainless steel pipe on specific tooling, and the operation is more complex; In the measurement process, the contact pressure between micrometer and pipe wall can cause local deformation, and affect the measurement precision; Different diameter stainless steel pipe needs to replace different specifications of micrometer, increases the detection cost and operation difficulty.

[0006] Pneumatic quantity instrument method: pneumatic quantity instrument can convert the change of pressure or flow into inner diameter size through the back pressure change formed by compressed air in the inner wall of stainless steel pipe. Compared with plug gauge method and inner diameter micrometer method, pneumatic quantity instrument method has the following advantages: high measurement precision, can reach micron level detection precision; Adopt non-contact measurement mode, avoid the mechanical damage to the inner wall of stainless steel pipe; Can realize automatic measurement, improves the detection efficiency and consistency.

[0007] However, the existing pneumatic quantity instrument detection equipment still has the following problems in the use process:

[0008] The existing pneumatic gauge usually needs multiple manual interventions in the fixing and positioning process of the measured stainless steel pipe, is complicated to operate, and is difficult to meet the needs of automation and batch detection; in the detection process, the contact pressure between the existing clamping structure and the pipe wall is uneven, which may cause positioning deviation and affect the measurement accuracy; the adjustment range of the existing clamping device is limited, and it is difficult to adapt to the detection of stainless steel pipes of different sizes and specifications, thereby limiting the versatility and flexibility of the equipment.

[0009] The utility model discloses just based on above technical problem, provide a kind of stainless steel pipe inner diameter size pneumatic detection platform combined with pneumatic gauge and clamping positioning structure. Through the innovative design of guide slope, expansion surface and clamping jaw linkage structure, different sizes and specifications of stainless steel pipe can be quickly positioned and centered automatically, combined with the accurate measurement of pneumatic gauge, the detection accuracy, operation convenience and the application range of equipment are significantly improved. Utility model content

[0010] The utility model discloses just based on above technical problem, provide a kind of stainless steel pipe inner diameter size pneumatic detection platform combined with pneumatic gauge and clamping positioning structure. Through the innovative design of guide slope, expansion surface and clamping jaw linkage structure, different sizes and specifications of stainless steel pipe can be quickly positioned and centered automatically, combined with the accurate measurement of pneumatic gauge, the detection accuracy, operation convenience and the application range of equipment are significantly improved.

[0011] The utility model discloses a kind of stainless steel pipe inner diameter size pneumatic detection platform, including starting gauge, detection platform group and driving disc.

[0012] 1. Starting gauge structure: starting gauge includes gas source, pressure regulating device, pressure stabilizing chamber, pressure sensor or flow sensor and display, output end is connected with measurement shaft head.

[0013] Gas source is used to provide stable compressed air. Pressure regulating device is used to adjust air pressure to ensure constant output air pressure. Pressure stabilizing chamber is used to maintain the stability of nozzle airflow and pressure. Pressure sensor or flow sensor is used to detect changes in pressure or flow. Display is used to convert pressure or flow changes into inner diameter size.

[0014] 2. Detection platform group structure: detection platform group includes fixed seat, bearing seat and several clamping jaws.

[0015] Fixed seat surface is provided with several stands, and clamping jaw is installed on the surface of stand through rotating structure. Bearing seat is fixed on the surface of fixed seat, and bearing seat is double-disc structure, and several guide pins are uniformly arranged between the two discs. Threaded installation is carried out on the surface of clamping jaw with support screw rod, and the clamping angle and clamping force of clamping jaw can be adjusted by rotating support screw rod. The end of clamping jaw is arc-shaped or curved surface structure, which can adapt to stainless steel pipes of different diameters and different shapes.

[0016] 3. Driving disc structure: driving disc is installed on the inner side of bearing seat through rotating structure. Limiting groove matched with guide pin is arranged on the surface of driving disc, for guiding and positioning when driving disc slides. Guide slope and expansion surface are arranged on the outer periphery of driving disc, and the surface of guide slope and expansion surface is in sliding abutment with the end of support screw rod.

[0017] The bottom surface of the driving disc is fixedly connected with an operating rod, and through rotation or sliding of the operating rod, the driving disc can be driven to slide along the guide pin, so that clamping or releasing operation of the clamping jaw is realized.

[0018] The utility model discloses achieved the beneficial effects are:

[0019] 1. In the utility model, through adopting the combination of pneumatic gauge and clamping jaw positioning structure, the inner diameter of stainless steel pipe can be detected with high precision. Through the change of pressure or flow, the inner diameter size is directly converted, so that high-precision and high-efficiency detection is realized, and the stability and reliability of the detection result are ensured.

[0020] 2. In the utility model, the linkage structure design of guide slope and expansion surface is adopted, so that the driving disc can be guided by the guide slope during sliding, and the radial expansion or contraction of the supporting screw rod is pushed, and the clamping jaw is further driven to clamp or loosen synchronously, so that the positioning and centering operation of the stainless steel pipe can be quickly completed, and the convenience and automation degree of detection operation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the whole structure schematic diagram of an embodiment of the utility model;

[0022] Figure 2 It is the detection bench group surface structure schematic diagram of an embodiment of the utility model;

[0023] Figure 3 It is the detection bench group exploded structure schematic diagram of an embodiment of the utility model;

[0024] Figure 4 It is the clamping jaw mounting structure schematic diagram of an embodiment of the utility model;

[0025] Figure 5 It is the driving disc structure schematic diagram of an embodiment of the utility model.

[0026] REFERENCE SIGNS:

[0027] 100, start gauge; 110, measurement shaft head;

[0028] 200, detection bench group; 210, fixed seat; 220, bearing seat; 230, clamping jaw; 211, stand; 221, guide pin; 231, supporting screw rod;

[0029] 300, driving disc; 310, operating rod; 301, limit groove; 302, guide slope; 303, expansion surface. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further explained in detail below in combination with specific implementation manners and referring to the drawings. It should be explained that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0031] It is understood that the description is only exemplary and is not intended to limit the scope of the utility model.

[0032] The utility model is described below in combination with the accompanying Figures 1-5 Some embodiments of the utility model provide a stainless steel pipe inner diameter size pneumatic detection platform.

[0033] Referring to Figures 1 to 5 The embodiment provides a stainless steel pipe inner diameter size pneumatic detection platform, which comprises a start amount instrument 100, a detection table set 200 and a driving disc 300.

[0034] The start amount instrument 100 comprises an air source, a pressure regulating device, a pressure stabilizing cavity, a pressure sensor or a flow sensor and a display. The output end of the start amount instrument 100 is connected with a measuring shaft head 110 fixed at the shaft center of the top surface of the bearing seat 220.

[0035] The structure and connection of the detection table set of the embodiment are as follows: the detection table set 200 comprises a fixed seat 210, the surface of the fixed seat 210 is fixedly installed with a plurality of stands 211, and the stands 211 are used for supporting clamping jaws 230.

[0036] The bearing seat 220 is fixed to the surface of the fixed seat 210 through fasteners, and the bearing seat 220 is a double-disc structure.

[0037] A plurality of guide pins 221 are uniformly arranged between the two discs and are used for guiding the sliding movement of the driving disc 300.

[0038] The bearing seat 220 is used for supporting the stainless steel pipe to be detected and guarantees stability.

[0039] The clamping jaw 230 is installed on the stand 211 through a rotating structure, the end of the clamping jaw 230 is in an arc or curved surface structure, and the clamping jaw 230 can adapt to stainless steel pipes of different diameters and shapes.

[0040] The surface of the clamping jaw 230 is provided with a threaded hole, and a supporting screw rod 231 is screw-mounted.

[0041] The clamping torque and clamping range of the clamping jaw 230 can be adjusted through the rotation adjustment of the supporting screw rod 231, and the fitting effect between the clamping jaw 230 and the stainless steel pipe is guaranteed.

[0042] The structure and connection of the driving disc of the embodiment are as follows: the driving disc 300 is installed on the inner side of the bearing seat 220 through a rotating structure.

[0043] The surface of the driving disc 300 is provided with a limiting groove 301 matched with the guide pin 221, for guiding and positioning the driving disc 300 when sliding.

[0044] The outer periphery of the driving disc 300 is provided with:

[0045] The guide slope 302 is used for guiding the sliding of the supporting screw 231 during the sliding of the driving disc 300, and further pushing the clamping jaw 230 to contract or expand in the radial direction.

[0046] The expansion surface 303 is in an arc structure, and the side away from the guide slope 302 is in sliding abutment with the end of the supporting screw 231.

[0047] The bottom surface of the driving disc 300 is fixedly connected with an operating rod 310, and through the rotation or sliding of the operating rod 310, the driving disc 300 can be driven to slide along the guide pin 221, so as to realize the clamping or releasing operation of the clamping jaw 230.

[0048] The structure and connection of the pneumatic gauge in the embodiment: the starting gauge 100 comprises: a gas source: for providing stable compressed air, usually filtered and dried.

[0049] A pressure regulating device: adjusts the gas pressure to a suitable constant pressure.

[0050] A pressure stabilizing chamber: maintains the stability of the nozzle gas flow and pressure.

[0051] A pressure sensor or flow sensor: for detecting the pressure or flow change between the nozzle and the stainless steel pipe.

[0052] A display: converts the pressure or flow change into the inner diameter size and displays.

[0053] When the starting gauge 100 detects, the gas flow enters the inner cavity of the stainless steel pipe through the measuring shaft head 110, a gap is formed between the measuring shaft head 110 and the inner wall of the stainless steel pipe, and the pneumatic gauge 100 converts the back pressure change generated by the gap into the inner diameter size of the stainless steel pipe.

[0054] The working principle and use process of the utility model:

[0055] The utility model relates to a kind of stainless steel pipe inner diameter size pneumatic detection platform, by innovative pneumatic detection and clamping jaw positioning structure, in combination with the linkage design of driving disc, guide pin and guide slope, the quick positioning of stainless steel pipe, centering and inner diameter detection can be realized, and detection precision and operation convenience are improved.Its complete working principle is as follows:

[0056] 1. The positioning and centering operation of the stainless steel pipe:

[0057] Before the inner diameter of the stainless steel pipe is detected, the stainless steel pipe to be detected is first sleeved on the top surface of the bearing seat 220.

[0058] The operating lever 310 is operated manually or automatically to drive the driving disc 300 to slide in the axial direction under the guidance of the guide pin 221.

[0059] During the sliding of the driving disc 300, the guide slope 302 and the expansion surface 303 on the outer periphery of the driving disc 300 are in contact with the end of the supporting screw 231 on the clamping jaw 230.

[0060] With the sliding of the driving disc 300, the guide slope 302 and the expansion surface 303 push the supporting screw 231 to slide radially outward, thereby driving the clamping jaw 230 to rotate around the stand 211, so that the end of the clamping jaw 230 is contracted or expanded in the radial direction, thereby clamping the stainless steel pipe.

[0061] By adjusting the rotation angle of the operating lever 310, the clamping force and the clamping angle of the clamping jaw 230 can be flexibly adjusted to ensure the stable positioning and centering operation of the stainless steel pipe on the surface of the bearing seat 220.

[0062] 2. Pneumatic detection of the inner diameter of the stainless steel pipe:

[0063] After the stainless steel pipe is positioned and centered, the gauge 100 is started for detection.

[0064] The gas source inside the pneumatic gauge 100 adjusts the gas pressure to a stable constant pressure through a pressure regulating device, and the compressed air flows to the measuring shaft head 110 through the pressure stabilizing chamber.

[0065] The measuring shaft head 110 is located at the center of the top surface of the bearing seat 220, and in the inner cavity of the stainless steel pipe, a certain gap is maintained between the measuring shaft head 110 and the inner wall of the stainless steel pipe.

[0066] During the measurement, the compressed air is sprayed out through the nozzle of the measuring shaft head 110, and the back pressure static pressure is formed between the nozzle and the inner wall of the stainless steel pipe.

[0067] The smaller the gap, the higher the back pressure; the larger the gap, the lower the back pressure.

[0068] Through the pressure sensor or flow sensor arranged inside the pneumatic gauge 100, the change of the back pressure or flow is monitored in real time, and it is converted into the corresponding inner diameter size of the stainless steel pipe.

[0069] The measurement result is displayed through the gauge display, and the measured value is calibrated with the actual size through the internal calibration relationship curve.

[0070] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pneumatic testing platform for the inner diameter of stainless steel pipes, characterized in that, include: Start-up measuring instrument (100), testing station assembly (200) and drive disk (300); The testing platform (200) includes a fixed base (210), a support base (220), and several grippers (230); several uprights (211) are fixedly installed on the surface of the fixed base (210), and the grippers (230) are installed on the surface of the uprights (211) through a rotating structure, and the surface of the grippers (230) is threaded with a support screw (231). The support base (220) is fixed to the surface of the fixed base (210), and the output end of the starting measuring instrument (100) is connected to a measuring shaft head (110) fixed at the center of the top surface of the support base (220). The support base (220) has a double-disc structure, and a number of guide pins (221) are provided between the two discs; the drive disc (300) is rotatably mounted on the inner side of the support base (220), and the surface of the drive disc (300) is provided with a limiting groove (301) that matches the guide pins (221); the outer periphery of the drive disc (300) is provided with a guide slope (302) and a tightening surface (303), and the surfaces of the guide slope (302) and the tightening surface (303) slide against the end of the support screw (231); the bottom surface of the drive disc (300) is fixedly connected with an operating rod (310).

2. The pneumatic detection platform for the inner diameter of a stainless steel pipe according to claim 1, characterized in that, The gripper (230) is connected to the stand (211) via a rotating structure. The support screw (231) is threaded onto the surface of the gripper (230) and is used to adjust the gripping force and gripping range of the gripper (230).

3. The pneumatic detection platform for the inner diameter of a stainless steel pipe according to claim 1, characterized in that, The guide slope (302) of the drive disk (300) is a curved slope, and the expansion surface (303) is an arc surface structure. The greater the distance between the side away from the guide slope (302) and the center of the drive disk (300), the more the end of the support screw (231) is in sliding contact with the guide slope (302) and the expansion surface (303).

4. The pneumatic detection platform for the inner diameter of a stainless steel pipe according to claim 1, characterized in that, The operating lever (310) drives the drive disk (300) to slide along the guide pin (221) by manual or automatic drive, and pushes the support screw (231) to move radially under the action of the guide inclined surface (302), thereby adjusting the clamping angle of the gripper (230).

5. The pneumatic detection platform for the inner diameter of a stainless steel pipe according to claim 1, characterized in that, The limiting groove (301) is arranged in a ring along the axial direction of the drive disk (300), and the width of the limiting groove (301) is adapted to the outer diameter of the guide pin (221).

6. The pneumatic detection platform for the inner diameter of a stainless steel pipe according to claim 1, characterized in that, The pneumatic measuring instrument (100) includes an air source, a pressure regulating device, a pressure stabilizing chamber, a pressure sensor or a flow sensor, and a display; the measuring shaft head (110) is arranged at the top of the pneumatic measuring instrument (100).

7. The pneumatic detection platform for the inner diameter of a stainless steel pipe according to claim 1, characterized in that, The end of the gripper (230) has an arc-shaped or curved structure.

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