In-hole annular groove measuring device

Abstract

The utility model discloses a device for measuring an annular groove in a hole, which comprises a digital display micrometer head, a fixing assembly and a measuring assembly, the fixing assembly is movably connected with the digital display micrometer head, the fixing assembly comprises a shell sleeve, a knob and a positioning block, the knob drives the positioning block to radially move through the shell sleeve so as to abut against a hole wall, and the measuring assembly comprises a lead screw. The two ends of the lead screw are connected with a micrometer head and a cone respectively, the lead screw rotates to drive the measuring head on the sleeve shell to move in the radial direction through the cone so as to abut against the hole wall or the annular groove, and the digital micrometer obtains the feeding amount of the measuring head through the lead screw and the cone. The in-hole annular groove measuring device is inserted into a hole to be measured, the positioning block is ejected out to expand and fix the in-hole annular groove measuring device, the measuring head is ejected out to abut against the hole wall and the groove bottom of the annular groove respectively, the depth of the annular groove is obtained, the measuring head can abut against the groove opening of the annular groove, and the width of the annular groove is obtained. The structure is simple, operation is convenient, and measurement precision can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to measuring tool technical field, concretely relates to a hole annular groove measuring device. BACKGROUND

[0002] The heat exchanger is a kind of pressure vessel, tube sheet and heat exchange tube strength expansion joint is more common connection form, and it requires that tube sheet has annular groove of strength expansion when strength expansion joint, the measuring tool is limited in use at present to the measurement of annular groove, and is limited by the position of annular groove opened on groove wall, it is inconvenient to operate, and precision error is easily produced, a new solution is provided for the above problems by the utility model. CONTENT OF UTILITY MODEL

[0003] The utility model discloses in order to overcome at least one of the above-mentioned shortcomings, provide a hole annular groove measuring device.The purpose of the utility model can be achieved by adopting the following technical scheme:

[0004] The utility model provides a hole annular groove measuring device, it includes:

[0005] Digital display differential head, digital display micrometer and micrometer head are included in the digital display differential head;

[0006] Fixed assembly, the fixed assembly is movably connected in the digital display differential head, the fixed assembly includes the casing and the knob of movable connection, the casing is movably connected with the positioning block, the knob can drive the casing axial movement, to make the positioning block radial movement for with the hole wall abuts;

[0007] Measuring assembly, the screw rod of axial arrangement is included, one end of the screw rod is connected with the micrometer head, the other end of the screw rod is connected with the cone, the casing is movably connected with the measuring head, the screw rod rotation drives the cone axial movement, to make the measuring head radial movement for with the hole wall or annular groove abuts, the digital display micrometer obtains the feed of the measuring head through the screw rod and the cone.

[0008] In a kind of implementable manner, the casing is connected between the screw thread, the knob rotation drives the casing to move axially towards close or away from the knob.

[0009] In a kind of implementable manner, the casing is hollow inside, the first through-hole for the positioning block to pass through is set up along the radial direction on the casing, the knob includes the circular truncated cone piece in the casing interior, the positioning block includes the inclined surface compatible with the circular truncated cone piece, the casing axial movement drives the positioning block radial movement.

[0010] In a kind of implementable manner, the radial setting stopper is equipped on the outer periphery side of the knob, and part of the stopper is located outside the edge area of hole wall.

[0011] In an embodiment, the axis of the screw rod coincides with the axis of the sleeve, the micrometer head rotates to drive the screw rod and the cone to move axially, the sleeve is provided with a second through hole for the measurement head to pass through in the radial direction, the axial movement of the cone drives the measurement head to move radially, and the digital display micrometer detects the feed amount of the measurement head through the displacement of the screw rod.

[0012] In an embodiment, the inclination angle of the cone is less than 45°; or the inclination angle of the cone is equal to 45°; or the inclination angle of the cone is greater than 45°.

[0013] In an embodiment, the measurement head comprises a planar abutting member, the planar abutting member comprises a planar surface for abutting with the hole wall or the groove bottom of the annular groove, and the outer diameter of the planar abutting member is less than the groove width of the annular groove.

[0014] In an embodiment, the measurement head comprises a circular arc abutting member, the circular arc abutting member comprises a circular arc surface for abutting with the groove opening of the annular groove, and the outer diameter of the circular arc abutting member is greater than the groove width of the annular groove.

[0015] In an embodiment, the circular arc abutting member comprises one of a hemisphere, a sphere, a cylinder and a semi-cylinder.

[0016] In an embodiment, the planar abutting member and the circular arc abutting member are detachably connected.

[0017] The beneficial technical effects of the utility model are as follows: according to the disclosure, the hole annular groove measuring device comprises a digital display micrometer, a fixing assembly and a measuring assembly, the hole annular groove measuring device is inserted into a hole to be measured, a knob is screwed to push out a positioning block from a sleeve, the hole annular groove measuring device is expanded and fixed, the digital display micrometer pushes out a measurement head from the sleeve through a screw rod and a cone to abut with a hole wall and a groove bottom of an annular groove respectively, the depth of the annular groove is obtained, different shapes of measurement heads can be replaced, the displacement of the measurement head is converted into a digital display micrometer reading by abutting with a groove opening of the annular groove, and the width of the annular groove is obtained, the device has a simple structure, is convenient to operate, is convenient to extend into a hole to measure an annular groove and can improve the measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0018] In the drawings, the following is shown by way of example and without limitation:

[0019] Figure 1 The overall structure of the hole annular groove measuring device is shown;

[0020] Figure 2 The structure of the measurement head and the positioning block is shown.

[0021] Figure 3 A structural sectional view of the planar abutting member and the top surface is shown;

[0022] Figure 4 A structural sectional view of the planar abutting member and the annular groove is shown;

[0023] Figure 5 A structural sectional view of the circular arc abutting member and the top surface is shown;

[0024] Figure 6 A structural sectional view of the circular arc abutting member is shown;

[0025] Figure 7 A structural sectional view of the circular arc abutting member and the annular groove is shown;

[0026] Figure 8 A structural sectional view of Figure 7 A structural enlarged view of A part of

[0027] Figure 9 A structural view of the first measuring head is shown;

[0028] Figure 10 A structural view of the second measuring head is shown;

[0029] Figure 11 A structural view of the third measuring head is shown;

[0030] Figure 12 A structural view of the fourth measuring head is shown;

[0031] Figure 13 A structural view of the fifth measuring head is shown.

[0032] In the drawings:

[0033] 100, top surface; 200, annular groove;

[0034] 1, digital display differential head; 2, fixed assembly; 3, measuring assembly;

[0035] 21, shell; 22, knob; 23, positioning block; 24, stop block; 31, lead screw; 32, cone; 33, measuring head; 331, planar abutting member; 332, circular arc abutting member. DETAILED DESCRIPTION

[0036] In the following detailed disclosure, the drawings are referred to, and the embodiments are fully described, so that the technical scheme of the present application is more clear and explicit to the person skilled in the art, and the following described embodiments are not limited to this, and the present application is further described in detail in combination with the embodiments and the drawings.

[0037] In the utility model, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] In the description of the utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear" and the like indicate the orientation or positional relationship shown in the drawing, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0039] The utility model provides a kind of hole annular groove measuring device, as shown in Figures 1-13 The utility model provides a kind of hole annular groove measuring device, as shown in

[0040] The hole annular groove measuring device provided by the embodiment is applied to measuring the size of the hole annular groove 200, and the hole annular groove measuring device comprises a digital micrometer, a fixing assembly 2 and a measuring assembly 3. The fixing assembly 2 comprises a sleeve, a knob 22 and a positioning block 23. The sleeve moves axially towards the knob 22 by rotating the knob 22. The knob 22 pushes the positioning block 23 out of the sleeve 21. The positioning block 23 moves radially until abutting against the hole wall, so as to expand and fix the hole annular groove measuring device, thereby ensuring the stability of the hole annular groove measuring device during the measuring process and avoiding shaking caused by manual operation to affect the measuring accuracy. The digital micrometer comprises a screw rod 31 and a cone 32. The screw rod 31 and the cone 32 move axially by rotating the measuring head. The inclined surface of the cone 32 pushes the measuring head 33 out. The position of the sleeve 21 can be adjusted so that the measuring head 33 abuts against the hole wall and the groove bottom of the annular groove 200 respectively. The difference between the two is the depth of the annular groove 200. The measuring head 33 of the arc can also be replaced. The displacement of the measuring head 33 is converted into the reading of the digital micrometer by abutting against the groove of the annular groove 200. According to the Pythagorean theorem, the width of the annular groove 200 is obtained. The device has simple structure, convenient operation, is convenient for stretching into the hole to measure the annular groove 200 and can improve the measuring accuracy.

[0041] In an implementation manner, as shown in Figures 1-7 The sleeve 21 is threadedly connected with the knob 22. The knob 22 rotates to drive the sleeve 21 to move axially towards or away from the knob 22.

[0042] The sleeve and the knob 22 can be threadedly connected. The inner wall of one end of the sleeve is provided with an internal thread. The outer wall of the knob 22 is provided with a matching external thread. Since the positioning block 23 and the measuring head 33 are arranged in the sleeve 21, the sleeve 21 is limited and cannot rotate circumferentially. When the knob 22 rotates, the sleeve 21 moves axially, thereby adjusting the position of the sleeve 21 in the hole, so as to drive the positioning block 23 to abut against the hole wall and drive the measuring head 33 to align with the hole wall or the annular groove 200.

[0043] In an implementation manner, as shown in Figures 1-7 The sleeve 21 is hollow. The sleeve 21 is provided with a first through hole in the radial direction for the positioning block 23 to pass through. The knob 22 comprises a circular cone arranged in the sleeve 21. The positioning block 23 comprises a matching inclined surface of the circular cone. The sleeve 21 moves axially to drive the positioning block 23 to move radially.

[0044] It can be understood that the number of the positioning blocks 23 is at least two, which can realize the fixing effect in the hole.

[0045] When the number of the positioning blocks 23 is two, the two positioning blocks 23 are oppositely arranged on the two sides of the sleeve 21.

[0046] Wherein, when the number of positioning blocks 23 is at least three, the at least three positioning blocks 23 are arranged uniformly in the circumferential direction, ensuring that the hole annular groove measuring device is in the central position and providing stable support.

[0047] Wherein, the surface of the positioning block 23 for abutting against the hole wall is a plane, increasing the contact area with the hole wall, and rubber can be arranged on the plane to prevent slipping.

[0048] Wherein, positioning blocks 23 of different sizes can be selected to meet the needs of different hole diameters.

[0049] Wherein, the position of the shell 21 can be adjusted directly by rotating the knob 22, and anti-skid lines can be arranged on the outer circumferential side of the knob 22 to improve the friction and facilitate screwing.

[0050] In an embodiment, as shown in Figures 5-7 , the outer circumferential side of the knob 22 is provided with a radially arranged stop block 24, and a part of the stop block 24 is located outside the edge area of the hole wall.

[0051] Wherein, the outer circumferential side of the knob 22 can be provided with an outwardly extending stop block 24, and the stop block 24 facilitates the screwing of the knob 22.

[0052] Wherein, the number of stop blocks 24 can be at least two, one end of the stop block 24 is connected with the knob 22, the other end of the stop block 24 is a free end and is located outside the edge area of the hole wall, and the end face of the stop block 24 facing the shell 21 can be arranged as a plane, facilitating abutting against the top of the hole, ensuring that the hole annular groove measuring device is located in the accurate position and the angle is aligned with the hole, reducing the error of operation and improving the measurement accuracy.

[0053] In an embodiment, as shown in Figures 1-7 , the axis of the lead screw 31 coincides with the axis of the shell 21, the micrometer head rotation drives the axial movement of the lead screw 31 and the cone 32, the second through hole is radially arranged on the shell 21 for the measuring head 33 to pass through, the axial movement of the cone 32 drives the radial movement of the measuring head 33, and the digital display micrometer detects the feed amount of the measuring head 33 through the displacement of the lead screw 31.

[0054] It can be understood that the axis of the screw rod 31 coincides with the axis of the sleeve 21, and after the hole inner ring groove measuring device is placed and fixed in the hole, the screw rod 31 is arranged along the axial direction of the hole, and the micrometer head can drive the screw rod 31 to move in the X direction, the screw rod 31 drives the cone 32 to push the measuring head 33 to move in the Y direction, the X direction is perpendicular to the Y direction, and the displacement of the measuring head 33 can be finely adjusted through the micrometer head. The digital micrometer reads the axial displacement of the screw rod 31 by using the screw pair principle, and the position of the measuring head 33 in the Y direction can be obtained through the ratio of the X direction displacement of the screw rod 31 and the Y direction displacement of the measuring head 33.

[0055] The digital differential head 1 mainly includes a digital micrometer and a micrometer head, the digital micrometer provides intuitive digital reading for accurate measurement, and the micrometer head is a key component for fine displacement adjustment. When the micrometer head is rotated, it should be kept at a uniform speed and moderate force to avoid inaccurate measurement caused by too fast or too slow rotation.

[0056] It can be understood that the cone 32 is conical, and the axis of the cone 32 coincides with the axis of the screw rod 31. When the screw rod 31 moves in the X direction, due to the inclination angle of the cone 32, a component force in the Y direction is generated, thereby pushing the measuring head 33 to move in the Y direction. The cone 32 plays a key role in converting the X direction displacement into the Y direction displacement in the micrometer head, and the inclination angle of the cone 32 is an important factor for determining the conversion ratio.

[0057] Specifically, the greater the inclination angle, the greater the displacement in the Y direction generated by the unit displacement in the X direction; on the contrary, the smaller the inclination angle, the smaller the conversion ratio. When designing or selecting the digital differential head 1, the inclination angle of the cone 32 is accurately set according to the actual measurement requirements to ensure that the required measurement accuracy and range are achieved.

[0058] In an implementation manner, when the inclination angle of the cone 32 is equal to 45°, the relationship between the displacement Δx of the screw rod 31 in the X direction and the displacement Δy of the measuring head 33 in the Y direction can be represented by the tangent function: tan 45° = Δx / Δy, because tan 45° = 1, so Δy = Δx. When the inclination angle of the cone 32 is 45°, the displacements in the X direction and the Y direction are equal, and the conversion ratio is 1:1, that is, the displacement reading of the measuring head 33 can be directly obtained through the digital micrometer.

[0059] In an implementation manner, the inclination angle of the cone 32 is denoted as θ, and when the inclination angle of the cone 32 is less than 45°, for the inclination angle less than 45°, the value of the tangent function will be less than 1, that is, tan θ < 1, where θ < 45°, and Δy is greater than Δx, because tan θ = Δx / Δy, and tan θ < 1, when the inclination angle of the cone 32 is less than 45°, the displacement in the Y direction will be greater than the displacement in the X direction, and the conversion ratio is greater than 1:1, which is more suitable for the to-be-measured hole with a larger hole diameter.

[0060] In an embodiment, the inclination angle of the cone 32 is denoted as θ, and the inclination angle of the cone 32 is greater than 45°. When the inclination angle is greater than 45°, the value of the tangent function will be greater than 1, i.e., tan θ > 1, where 45° < θ < 90°, and Δy is less than Δx, because tan θ = Δx / Δy, and tan θ > 1, when the inclination angle of the cone 32 is greater than 45°, the displacement in the Y direction will be less than the displacement in the X direction, and the conversion ratio is less than 1:1, which is more suitable for holes with smaller diameters.

[0061] In an embodiment, as shown in Figures 1-4 the measuring head 33 comprises a planar abutting member 331, which comprises a planar surface for abutting with the hole wall or the groove bottom of the annular groove 200, and the outer diameter of the planar abutting member 331 is less than the groove width of the annular groove 200.

[0062] In an embodiment, as shown in Figure 3 and Figure 4 the planar abutting member 331 is moved to abut with the hole wall, i.e., the fixed profile of the annular groove 200, and the value Y1 on the digital display micrometer is read; the rotating retracting positioning block 23 moves the annular groove measuring device in the hole, so that the planar abutting member 331 is aligned with the annular groove 200, and the planar abutting member 331 is moved to abut with the groove bottom of the annular groove 200 after being fixed again, and the value Y1 on the digital display micrometer is read, the displacement of the lead screw 31 in the X direction is Y1-Y2, and the displacement of the measuring head 33 in the Y direction is obtained according to the inclination angle of the cone 32, tan θ = Δx / Δy, and the displacement of the measuring head 33 in the Y direction is L1 = (Y1-Y2) / tan θ, so that the depth of the annular groove 200 can be obtained.

[0063] In an embodiment, as shown in Figures 5-13 the measuring head 33 comprises a circular arc abutting member 332, which comprises a circular arc surface for abutting with the hole wall or the groove opening of the annular groove 200, and the outer diameter of the circular arc abutting member 332 is greater than the groove width of the annular groove 200.

[0064] In an embodiment, as shown in Figures 5-8As shown, by moving the circular arc abutting piece 332 to abut against the hole wall, the hole wall is the fixed profile of the annular groove 200, at this time the value Y3 on the digital display micrometer is read; rotating the retraction positioning block 23 to move the annular groove measuring device in the hole, the circular arc abutting piece 332 is aligned with the annular groove 200, and after being fixed again, the circular arc abutting piece 332 is moved to abut against the slot of the annular groove 200, at this time the value Y4 on the digital display micrometer is read, the displacement of the screw 31 in the Y direction is Y3-Y4, and the displacement of the measuring head 33 in the Y direction is obtained according to the inclination angle of the cone 32, tan θ = Δx / Δy, the displacement of the measuring head 33 in the Y direction is L2 = (Y3-Y4) / tan θ, and according to the Pythagorean theorem, under the premise that the radius of the circular arc abutting piece 332 is R, the distance L3 between the slot and the center of the circle in the Y direction is L3 = R-(Y3-Y4) / tan θ, and the other right angle of the right triangle is Therefore, the slot width of the annular groove 200 is 2xL4.

[0065] In an implementation manner, as shown in Figures 9-13 The circular arc abutting piece 332 includes one of a hemisphere, a sphere, a cylinder and a semi-cylinder, so that the circular arc abutting piece 332 has at least one semi-circular arc surface for abutting against the slot of the annular groove 200, and the specific shape can be set according to the shape and size of the annular groove 200.

[0066] In an implementation manner, as shown in Figures 9-13 The flat abutting piece 331 and the circular arc abutting piece 332 are detachably connected.

[0067] In a specific implementation, the flat abutting piece 331 and the circular arc abutting piece 332 can be detachably connected, the slot depth is measured by the flat abutting piece 331, and then the circular arc abutting piece 332 is assembled on the flat abutting piece 331 to measure the slot width.

[0068] As shown in Figure 9 The end surface of the flat abutting piece 331 can be provided with a groove, and the end of the circular arc abutting piece 332 away from the circular arc surface is provided with a matching convex part, and the convex part is embedded in the groove to complete the assembly.

[0069] Further, as shown in Figure 10 The convex part and the groove can be threadedly connected, which is convenient for installation and disassembly; as shown in Figure 11 The convex part and the groove can be relatively provided with magnetic attraction members and connected together through magnetic attraction, which is convenient for installation and disassembly, and the stability between the flat abutting piece 331 and the circular arc abutting piece 332 can be improved, the error caused by the relative movement between the two can be avoided, and the measurement accuracy can be improved.

[0070] It can be understood that the connection mode between the planar abutting member 331 and the circular arc abutting member 332 is not limited to the above several modes, and the two can be assembled together.

[0071] 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 refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0072] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0073] In view of the above detailed description, these and other changes can be made to these embodiments, and the present written description includes the best mode of the embodiments disclosed in the present application. The patent scope obtained by the present application is defined by the claims, and the claims are not limited by the disclosure, and the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the scope disclosed by the present application, which is within the protection scope of the present application.

Claims

1. A borehole annular slot measuring device, characterized by, The utility model relates to a hole inner annular groove measuring device, including: Digital differential head (1), the digital differential head includes digital dial micrometer and micrometer head; Fixed assembly (2), the fixed assembly (2) is movably connected to the digital differential head (1), the fixed assembly (2) includes movably connected casing (21) and knob (22), the casing (21) is movably connected with locating block (23), the knob (22) can drive the casing (21) axial movement, to make the locating block (23) radial movement for with hole wall abuts; Measuring assembly (3), the measuring assembly (3) includes axially arranged lead screw (31), one end of the lead screw (31) is connected with the micrometer head, the other end of the lead screw (31) is connected with cone (32), the casing (21) is movably connected with measuring head (33), the lead screw (31) rotation drives the cone (32) axial movement, to make the measuring head (33) radial movement for with hole wall or annular groove abuts, the digital dial micrometer obtains the feed of the measuring head (33) through the lead screw (31) and the cone (32).

2. The borehole annular slot measurement device of claim 1, wherein, The casing (21) and the knob (22) are threadedly connected, the knob (22) is rotated to drive the casing (21) to move axially towards or away from the knob (22).

3. The borehole annular slot measurement device of claim 2, wherein, The casing (21) is hollow inside, the casing (21) is radially provided with a first through hole for the locating block (23) to pass through, the knob (22) includes a circular cone part inside the casing (21), the locating block (23) includes a slope surface matched with the circular cone part, the casing (21) moves axially to drive the locating block (23) to move radially.

4. The borehole annular slot measurement device of claim 1, wherein, The knob (22) is provided with a radial stop block (24) on the outer periphery, and a part of the stop block (24) is located outside the edge area of the hole wall.

5. The borehole annular slot measurement device of any one of claims 1-4, wherein, The axis of the lead screw (31) coincides with the axis of the casing (21), the micrometer head rotates to drive the lead screw (31) and the cone (32) to move axially, the casing (21) is radially provided with a second through hole for the measuring head (33) to pass through, the cone (32) moves axially to drive the measuring head (33) to move radially, and the digital dial micrometer detects the feed of the measuring head (33) through the displacement of the lead screw (31).

6. The hole inner annular groove measuring device according to claim 5, wherein: The inclination angle of the cone (32) is less than 45°; or The inclination angle of the cone (32) is equal to 45°; or The inclination angle of the cone (32) is greater than 45°.

7. The borehole annular slot measurement device of claim 1, wherein, The measuring head (33) includes a planar abutting member (331) having a planar surface for abutting against the hole wall or the bottom of the annular groove, and the outer diameter of the planar abutting member (331) is less than the groove width of the annular groove.

8. The borehole annular slot measurement device of claim 7, wherein, The measuring head (33) includes a circular arc abutting member (332) having a circular arc surface for abutting against the annular groove, and the outer diameter of the circular arc abutting member (332) is greater than the groove width of the annular groove.

9. The borehole annular slot measurement device of claim 8, wherein, The circular-arc abutting piece (332) comprises one of a hemisphere, a sphere, a cylinder and a semi-cylinder.

10. The borehole annular slot measurement device of claim 9, wherein, The planar abutting piece (331) and the circular-arc abutting piece (332) are detachably connected.

Images