Caliper for measuring diameters of sealing groove and sealing ring at end part of flange

Abstract

The utility model discloses a diameter measuring caliper for a flange end sealing groove and a sealing ring, and belongs to the technical field of measuring instruments. The ruler comprises a main ruler, main scales with the unit of millimeter are arranged on the surface of the main ruler, a fixed clamping foot is arranged at one end of the main ruler, and a calibration device is arranged at the end of the fixed clamping foot. An auxiliary ruler is movably arranged on the main ruler, a movable clamping foot is arranged at one end, far away from the fixed clamping foot, of the auxiliary ruler, a vernier is arranged on the auxiliary ruler, and a fixing device is arranged on the auxiliary ruler; according to the utility model, the caliper is provided with the fixed clamping pin and the movable clamping pin to adapt to the sealing cone angles of the sealing groove and the sealing ring, the measuring caliper is simple in structure and convenient to measure, and the diameter of the sealing groove at the end part of the flange and the diameter of the sealing cone of the sealing ring can be quickly measured.

Description

Technical Field

[0001] The utility model relates to a flange end sealing groove and a sealing ring diameter measuring caliper, belonging to the technical field of measuring instruments. Background Art

[0002] In the modern chemical industry, chemical production equipment often needs to meet the requirements of high temperature, high pressure and corrosion resistance. The materials are generally high-grade stainless steel such as 2507 stainless steel, and some even use expensive zirconium alloy. In order to facilitate disassembly, when flanges are used for local pipe connections, rigid stainless steel sealing rings are often used for sealing in order to meet the harsh production conditions (see attached). Figure 2 In actual engineering, double nuts are used to tighten the tie rod bolts at each end. Because the sealing ring is made of rigid material, the matching precision between the sealing cones at each end of the sealing ring and the sealing groove at the flange end must be extremely high. Prior to installation, the matching flanges and sealing rings are machined on high-precision processing equipment, which generally meets the requirements. However, due to machining accuracy errors (such as angular and dimensional errors), the actual matching surface (contact surface) between the sealing ring cone and the sealing groove is limited, primarily consisting of linear contact. This poses a safety hazard for high-pressure sealing requirements. In the event of an actual leak, the ejected high-temperature, high-pressure gas acts as a cutting jet, rapidly increasing the leak gap, causing injuries to personnel and surrounding objects, polluting the environment, causing equipment downtime, and potentially leading to even greater safety incidents.

[0003] In order to check whether the conical diameter of the sealing ring and the diameter of the sealing groove at the flange end match, precise measurement is usually required. Since the conical surface of the sealing ring and the cross-section of the sealing groove are both conical surfaces, conventional methods are inconvenient to measure, so it is necessary to design a special diameter measuring instrument. Utility Model Content

[0004] The purpose of the utility model is to overcome the existing measurement and inspection of the conical surface diameter of the sealing ring and the diameter of the sealing groove at the end of the flange, which cannot match each other. Usually, accurate measurement is required. Since the conical surface of the sealing ring and the cross-section of the sealing groove are both conical surfaces, the existing method is inconvenient to measure. A caliper is provided to measure the diameter of the sealing groove and the sealing ring at the end of the flange.

[0005] In order to achieve the above purpose / solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A caliper for measuring the diameter of a flange end sealing groove and a sealing ring, comprising:

[0007] A main ruler, the surface of which is provided with a main scale, a fixed foot is provided at one end of the main ruler, and a calibration device is provided at the end of the fixed foot; a secondary ruler is movably provided on the main ruler, and a movable foot is provided at the end of the secondary ruler away from the fixed foot, a vernier is provided on the secondary ruler, and a fixing device for positioning the secondary ruler relative to the main ruler is provided on the secondary ruler.

[0008] Optionally, the main ruler is in the shape of a rectangular strip.

[0009] Optionally, the fixed clamping foot is provided with a guide groove, and is movably clamped on the main scale through the guide groove. The top of the fixed clamping foot is provided with a fixed V-shaped clamping groove for clamping the sealing ring, and the bottom is provided with a fixed convex cone clamping foot clamped in the sealing groove.

[0010] Optionally, the angles of the fixed convex cone and the fixed V-shaped groove are consistent with the sealing groove at the end of the flange and the sealing cone angle of the sealing ring.

[0011] Optionally, a movable V-shaped groove is provided on the top of the movable clamping foot, and a movable convex cone clamping foot is provided on the bottom.

[0012] Optionally, the angles of the movable convex cone and the movable V-shaped groove are consistent with the sealing groove at the end of the flange and the sealing cone angle of the sealing ring.

[0013] Optionally, the fixing device is a fixing screw.

[0014] Optionally, the calibration device includes a screw seat provided with a side portion of a fixed clamping foot and an adjusting screw, the adjusting screw fine-tunes the position of the fixed clamping foot at the left end of the main scale, and the screw seat is used to lock the adjusting screw.

[0015] Compared with the existing technology, the beneficial effects achieved by the utility model are as follows: the utility model adapts to the sealing cone angle of the sealing groove and the sealing ring by arranging fixed clamping feet and movable clamping feet on the caliper. The measuring caliper has a simple structure and is convenient for measurement. It can quickly measure the sealing groove diameter of the flange end and the sealing cone diameter of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic structural diagram of an embodiment of the measuring caliper of the present utility model;

[0017] Figure 2 Shown is a schematic diagram of the measurement state of the utility model;

[0018] In the figure: 1-main scale; 11-main scale;

[0019] 2-secondary ruler; 21-vernier; 22-fixing screw;

[0020] 3-Fixed foot; 31-Fixed convex conical foot; 32-Fixed V-shaped slot; 33-Guide slot; 34-Screw seat; 35-Adjusting screw; 36-Fastening screw;

[0021] 4- movable clamping foot; 41- movable convex cone clamping foot; 42- movable V-shaped clamping groove;

[0022] 5-flange; 6-sealing ring. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] like Figure 1-Figure 2 As shown, a flange end sealing groove and sealing ring diameter measuring caliper is disclosed, comprising:

[0027] A main ruler, the surface of which is provided with a main scale 11 in millimeters, a fixed foot provided at one end of the main ruler, and a calibration device provided at the end of the fixed foot; a secondary ruler movably provided on the main ruler, a movable foot provided at the end of the secondary ruler away from the fixed foot, a vernier provided on the secondary ruler, and a fixing device provided on the secondary ruler for positioning relative to the main ruler;

[0028] A waist-shaped connection hole is provided at the left end of the main scale 1, and a fixed foot 3 is fixedly provided at the left end of the main scale by a fastening screw 36. A guide groove 33 is provided on the fixed foot 3, and the guide groove 33 is slidably clamped on the upper and lower sides of the main scale 1.

[0029] The fixing foot 3 is provided with a fixing cone foot 31 and a fixing V-shaped groove 32. The angles of the fixing cone and the fixing V-shaped groove match the sealing groove and the sealing cone angle of the sealing ring at the flange end. The centerline of the fixing cone and the centerline of the fixing V-shaped groove are collinear and perpendicular to the main scale 1.

[0030] A secondary scale 2 is slidably provided on the main scale 1, and a vernier 21 is provided on the secondary scale 2. The scale method of the vernier 21 is consistent with that of a conventional vernier caliper.

[0031] A movable foot 4 is also fixed to the right end of the secondary scale 2. This foot 4 is equipped with a movable convex conical foot 41 and a movable V-shaped groove 42. The angles of the movable conical foot and the movable V-shaped groove match the sealing groove and the sealing cone angle of the sealing ring at the flange end. The centerline of the movable conical foot and the centerline of the movable V-shaped groove are collinear and perpendicular to the main scale 1.

[0032] In this embodiment, the calibration device includes a screw seat 34 and an adjustment screw 35 at the left end of the fixed foot 3. By slightly loosening the tightening screw 36, the position of the fixed foot 3 relative to the left end of the main scale 1 can be fine-tuned using the adjustment screw 35 (only used during calibration). Once adjustment is complete, tighten the tightening screw 36.

[0033] In the specific implementation process, the fixing device is a fixing screw 22, and a fixing screw 22 is also provided on the secondary ruler 2 to facilitate reading after fixing the secondary ruler 2.

[0034] In this embodiment, the main ruler 1 is in the shape of a rectangular strip, and a main scale 11 in millimeters is provided on the surface.

[0035] When measuring the diameter of the sealing groove at the end of the flange 5, directly insert the fixed convex cone clamping foot 31 and the movable convex cone clamping foot 41 into the sealing groove, keep the left end in place, and make a slight swing at the right end. The maximum reading is the diameter of the sealing groove at the end of the flange.

[0036] When measuring the sealing cone diameter of the sealing ring 6, clamp the sealing cone of the sealing ring on the V-shaped groove 32 and the V-shaped groove 42, keep the left end in a fixed position, and make a slight swing on the right end. The maximum reading is the sealing cone diameter of the sealing ring.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A caliper for measuring the diameter of a flange end sealing groove and a sealing ring, characterized in that: include: A main ruler, the surface of which is provided with a main scale, a fixed foot is provided at one end of the main ruler, and a calibration device is provided at the end of the fixed foot; a secondary ruler is movably provided on the main ruler, and a movable foot is provided at the end of the secondary ruler away from the fixed foot, a vernier is provided on the secondary ruler, and a fixing device for positioning the secondary ruler relative to the main ruler is provided on the secondary ruler.

2. The flange end sealing groove and sealing ring diameter measuring caliper according to claim 1, characterized in that: The main ruler is in the shape of a rectangular strip.

3. The flange end sealing groove and sealing ring diameter measuring caliper according to claim 1, characterized in that: The fixed clamping foot is provided with a guide groove and is movably clamped on the main scale through the guide groove. The top of the fixed clamping foot is provided with a fixed V-shaped clamping groove for clamping the sealing ring, and the bottom is provided with a fixed convex cone clamping foot clamped in the sealing groove.

4. The flange end sealing groove and sealing ring diameter measuring caliper according to claim 3, characterized in that: The angles of the fixed convex cone and the fixed V-shaped groove are consistent with the sealing groove at the end of the flange and the sealing cone angle of the sealing ring.

5. The flange end sealing groove and sealing ring diameter measuring caliper according to claim 1, characterized in that: The top of the movable clamping foot is provided with a movable V-shaped clamping groove, and the bottom is provided with a movable convex cone clamping foot.

6. The flange end sealing groove and sealing ring diameter measuring caliper according to claim 5, characterized in that: The angles of the movable convex cone and the movable V-shaped groove are consistent with the sealing groove at the end of the flange and the sealing cone angle of the sealing ring.

7. The flange end sealing groove and sealing ring diameter measuring caliper according to claim 1, characterized in that: The fixing device is a fixing screw.

8. The flange end sealing groove and sealing ring diameter measuring caliper according to claim 1, characterized in that: The calibration device includes a screw seat provided with a side portion of a fixed clamping foot and an adjusting screw. The adjusting screw fine-adjusts the position of the fixed clamping foot at the left end of the main scale, and the screw seat is used to lock the adjusting screw.

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