Valve sleeve inner diameter and roundness measuring device

Abstract

The utility model relates to a device for measuring the inner diameter and the roundness of a valve sleeve. The device comprises a mounting table, a sleeve assembly and a measuring assembly, the sleeve assembly comprises a sleeve body and a connecting rod assembly. The measuring assembly comprises a measuring disc and a laser range finder, the measuring disc is arranged on the positioning table top of the mounting table through a bearing and arranged outside the cylinder in a sleeving mode, and the laser range finder is mounted on the connecting rod assembly, so that a laser emitting opening of the laser range finder horizontally faces the outside of the cylinder through a window of the cylinder. A to-be-measured valve sleeve is arranged on the measuring disc and sleeved outside the cylinder body, when the laser range finder measures that the distance between the laser range finder and the inner side wall of the valve sleeve is A, the measuring disc is rotated to drive the valve sleeve to rotate by 180 degrees, and then the distance between the laser range finder and the inner side wall of the valve sleeve is measured as B; and calculating the inner diameter of the valve sleeve according to the distance A and the distance B. By parity of reasoning, the inner diameters and roundness of the valve sleeves with different sleeve depths can be obtained, and then whether the valve sleeves have defects or not is judged. Therefore, the problems of measurement and evaluation of the inner diameter, the roundness and the defects of the valve sleeve are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve maintenance, in particular to a valve sleeve inner diameter and roundness measuring device. Background Art

[0002] The valve sleeve is an important part of the hydraulic valve. The valve sleeve is the only part that can be worn. The valve is pressed by compressed air on the valve sleeve. The valve housing forms part of the operator, so that the expensive piston operator, operating membrane, or electric motor can be avoided. The air pressure is between the gap between the valve housing and the valve sleeve, which is used to operate the opening and closing and throttling of the valve. The inner hole of the valve sleeve mainly needs to be formed by machining, and the inner hole of the valve sleeve needs to be fully inspected. In the prior art, it is generally a manual plug gauge full inspection, which has high labor costs and low efficiency. In addition, manual inspection is prone to mistakenly put defective products into good products, and the quality cannot be guaranteed. Therefore; or it is measured by vernier calipers, inner diameter measuring gauges, etc. However, the measurement position is limited, and generally only the edge position of the inner diameter of the bushing can be measured. And the operation process requires the vernier caliper or the inner diameter measuring gauge to take out the reading, resulting in a certain negative deviation in the measurement data. At the same time, the measurement method in the prior art makes the measurement result single, and it is impossible to make an effective assessment of the overall situation of the bushing.

[0003] Therefore, it is necessary to design a valve sleeve inner diameter and roundness measuring device to solve the problems of valve sleeve inner diameter, roundness and defect measurement and evaluation. Utility Model Content

[0004] In view of some of the shortcomings of the above-mentioned prior art, the utility model provides a valve sleeve inner diameter and roundness measuring device, optimizes the measuring device, can enrich the measurement data, and comprehensively evaluate the inner surface state and defects of the valve sleeve through data calculation and processing.

[0005] A device for measuring the inner diameter and roundness of a valve sleeve, comprising:

[0006] The mounting table, the upper surface of the mounting table is a horizontal positioning table;

[0007] The sleeve assembly includes a cylinder and a connecting rod assembly, the cylinder is vertically inserted on the positioning table, and the connecting rod assembly is axially telescopically mounted on the cylinder;

[0008] The measuring assembly includes a measuring disk and a laser rangefinder. The measuring disk is arranged on the positioning table and sleeved outside the cylinder. The laser rangefinder is installed in the connecting rod assembly so that the laser emission port of the laser rangefinder is horizontally facing the outside of the cylinder through the window corresponding to the cylinder.

[0009] In one embodiment of the utility model, the upper part of the cylinder extends out of the positioning table of the mounting table, and a long window is opened axially on the corresponding side wall. The laser rangefinder is installed on the connecting rod assembly. The laser emission port of the laser rangefinder corresponds to the window position of the cylinder and can move along the opening direction of the window.

[0010] In one embodiment of the utility model, the connecting rod assembly includes at least one piston rod and a piston, one end of the piston rod is connected to the piston, the piston is arranged in a cylinder, and the lower end of the piston is correspondingly connected to a compression spring, the compression spring is located in the cylinder, and the free end of the piston rod extends upward and out of the cylinder.

[0011] In one embodiment of the utility model, the connecting rod assembly includes a first piston, a first piston rod, a second piston and a second piston rod which are arranged in sequence from bottom to top in a cylinder body, a compression spring is provided in the cylinder body corresponding to the lower part of the first piston, the first piston is connected to the first piston rod, the second piston is connected to the second piston rod, the free end of the first piston rod is connected to the second piston, and the free end of the second piston rod extends vertically upward out of the cylinder body.

[0012] In one embodiment of the present invention, the connecting rod assembly further comprises a cover, which is coaxially fitted and buckled on the upper end of the cylinder body, so that the free end of the second piston rod contacts the closed end of the cover away from the second piston.

[0013] In one embodiment of the utility model, a positioning block is provided in the middle of the closed end of the cover, the positioning block is provided with a positioning blind hole, and the free end of the second piston is inserted into the positioning blind hole of the positioning block.

[0014] In one embodiment of the utility model, the first end of the laser rangefinder is fixedly mounted on the first piston rod, and the second end of the laser rangefinder opposite to the first end is provided with a laser emission port. The distance from the first end to the second end of the laser rangefinder is equal to the radius of the cylinder, and the laser emitted from the laser emission port is horizontally emitted through the window of the cylinder toward the outside of the cylinder and the inner wall of the valve sleeve to be measured.

[0015] In one embodiment of the utility model, the axial length of the cover is greater than or equal to the axial length of the valve sleeve to be measured. When the cover presses down vertically or releases the free end of the second piston rod, the first piston rod moves axially in the cylinder, driving the laser rangefinder to move along the axial direction of the valve sleeve from one end of the valve sleeve to the other end.

[0016] In one embodiment of the present invention, the first piston rod and the second piston rod are both inserted in the central axial direction of the cylinder; the cylinder is a standard cylindrical bushing with an inner diameter Z=00mm.

[0017] In one embodiment of the present invention, the measuring disc is disposed on the positioning table of the mounting table through a bearing; the measuring disc includes at least 0°, 90°, 180° and 270° scale marks.

[0018] The beneficial technical effects of the utility model include at least:

[0019] The utility model discloses a device for measuring the inner diameter and roundness of a valve sleeve, comprising a mounting platform, a sleeve assembly and a measuring assembly, wherein the upper surface of the mounting platform is a horizontal positioning surface. The sleeve assembly comprises a cylinder and a connecting rod assembly, wherein the cylinder is vertically inserted on the positioning platform, and the connecting rod assembly is elastically inserted on the central axis of the cylinder. The measuring assembly comprises a measuring disc and a laser rangefinder, wherein the measuring disc is arranged on the positioning surface of the mounting platform through a bearing and sleeved outside the cylinder, and the laser rangefinder is installed on the connecting rod assembly so that the laser emission port of the laser rangefinder is horizontally directed to the outside of the cylinder through the window of the cylinder. The valve sleeve to be measured is arranged on the measuring disc and sleeved outside the cylinder, and when the laser rangefinder measures that the distance A from the valve sleeve to the inner side wall is measured, the measuring disc is rotated to drive the valve sleeve to rotate 180°, and then the distance B from the valve sleeve to the inner side wall is measured; the inner diameter of the valve sleeve is calculated from the distance A and the distance B. By analogy, the distance A' and the distance B' can also be measured, and the roundness of the cross section of the valve sleeve 4 at this position can be calculated, and the roundness = (A+B)-(A'+B'). By analogy, the inner diameter and roundness of the valve sleeve with different sleeve depths can be obtained. According to the inner diameter and roundness at different positions of the valve sleeve, the deformation inside the valve sleeve can be judged, and then it can be judged whether it has defects. Therefore, the utility model solves the problem of measuring and evaluating the inner diameter, roundness and defects of the valve sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a device for measuring the inner diameter and roundness of a valve sleeve in one embodiment of the utility model;

[0021] Figure 2 To display Figure 1 A schematic diagram of the cooperation between the window on the barrel of the measuring device and the laser emission port of the laser rangefinder;

[0022] Figure 3 This is a schematic diagram of the use state of the measuring device in one embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the scale marked on the measuring disk in one embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the change of the measured value of the inner diameter of the valve sleeve in one embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of the change of the measured value of the inner diameter of the valve sleeve in another embodiment of the utility model.

[0026] Component Symbols:

[0027] Mounting table 1, positioning table surface 11, cylinder 21, window 211, connecting rod assembly 22, first piston 221, first piston rod 222, second piston 223, second piston rod 224, cover 225, closed end 2251, positioning block 2252, compression spring 23, measuring disc 31, laser rangefinder 32, first end 321, second end 322, laser emission port 323, bearing 33, valve sleeve 4. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0030] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0031] In one embodiment of the present invention, see Figure 1 to Figure 3 The utility model is a device for measuring the inner diameter and roundness of a valve sleeve, comprising a mounting platform 1, a sleeve assembly and a measuring assembly, wherein the upper surface of the mounting platform 1 is a horizontal positioning surface 11. The sleeve assembly comprises a cylinder 21 and a connecting rod assembly 22, wherein the cylinder 21 is vertically inserted on the mounting platform 1, and the connecting rod assembly 22 is elastically inserted in the central axial direction of the cylinder 21. The measuring assembly comprises a measuring disk 31 and a laser rangefinder 32, wherein the measuring disk 31 is arranged on the positioning surface 11 of the mounting platform 1 through a bearing 33 and is sleeved outside the cylinder 21, and the laser rangefinder 32 is installed on the connecting rod assembly 22, so that the laser emission port 323 of the laser rangefinder 32 is horizontally facing the outside of the cylinder 21 through the window 211 of the cylinder 21. The measuring disk 31 comprises at least 0°, 90°, 180° and 270° scale marks.

[0032] The valve sleeve 4 is arranged on the measuring disc 31 and sleeved outside the cylinder 21. When the laser rangefinder 32 measures the distance A from the inner wall of the valve sleeve 4, the measuring disc 31 is rotated to drive the valve sleeve 4 to rotate 180°, and then the distance B from the inner wall of the valve sleeve 4 is measured; the inner diameter of the valve sleeve 4 is calculated from the distance A and the distance B. That is, when the laser emission port 323 of the laser rangefinder 32 corresponds to the 0° and 180° scale marks of the measurement 31, the distance A and the distance B are measured respectively, and when the laser emission port 323 of the laser rangefinder 32 corresponds to the 90° and 270° scale marks of the measurement 31, the distance A' and the distance B' are measured respectively. Since the laser rangefinder 32 is mounted on the connecting rod assembly 22, and the connecting rod assembly 22 is elastically inserted in the central axis of the cylinder 21, it is only necessary to know the distance C (known parameter) from the mounting portion of the laser rangefinder 32 to the laser emission port 323 to obtain the inner diameter of a certain set depth position of the valve sleeve 4, and the inner diameter of the valve sleeve 4 = A + B + 2C. When the measuring disk 31 is rotated, the distance A' and the distance B' are obtained as above, and the inner diameter of the valve sleeve 4 at the same set depth position can be obtained, and the inner diameter of the valve sleeve 4 = A' + B' + 2C, and the roundness of the cross section of the valve sleeve 4 at this position is calculated, and the roundness = (A + B) - (A' + B'). By analogy, the inner diameter and roundness of the valve sleeve 4 at different sleeve depths can be obtained. According to the inner diameter and roundness at different positions of the valve sleeve 4, the deformation inside the valve sleeve 4 can be judged, and then it can be judged whether it has defects. Therefore, the utility model solves the problem of measuring and evaluating the inner diameter, roundness and defects of the valve sleeve.

[0033] In one embodiment of the utility model, the cylinder 21 is vertically and inserted into the mounting cavity of the mounting platform 1. The upper part of the cylinder 21 extends out of the positioning table 11 of the mounting platform 1, and a long window 211 is opened axially on the corresponding side wall. The laser rangefinder 32 is installed on the connecting rod assembly 22. The laser emission port 323 of the laser rangefinder 32 corresponds to the position of the window 211 of the cylinder 21 and can move along the opening direction of the window 211.

[0034] In one embodiment of the utility model, the connecting rod assembly 22 includes a first piston 221, a first piston rod 222, a second piston 223 and a second piston rod 224 which are sequentially arranged in the cylinder 21 from bottom to top, a compression spring 23 is arranged in the cylinder 21 corresponding to the lower part of the first piston 221, the first piston 221 is connected to the first piston rod 222, the second piston 223 is connected to the second piston rod 224, the free end of the first piston rod 222 is connected to the second piston 223, and the free end of the second piston rod 224 extends vertically upward out of the cylinder 21. The connecting rod assembly 22 also includes a cover 225, which is coaxially and fittingly buckled at the upper end of the cylinder 21, so that the free end of the second piston rod 224 is in contact with the closed end 2251 of the cover 225 away from the second piston 223. A positioning block 2252 is provided in the middle of the closed end 2251 of the cover 225. A positioning blind hole is provided on the positioning block 2252. The free end of the second piston 223 is inserted into the positioning blind hole of the positioning block 2252. The axial height of the cover 225 is greater than or equal to the axial height of the valve sleeve 4. When the cover 225 vertically presses the free end of the second piston rod 224 downward, the first piston rod 222 moves axially in the cylinder 21, driving the laser rangefinder 32 to move from the first end to the second end opposite to the first end along the axial direction of the valve sleeve 4, or after the free end of the second piston rod 224 is vertically pressed downward, it is gradually released. Under the action of the restoring force of the compression spring 23, the first piston rod 222 moves axially in the cylinder 21, driving the laser rangefinder 32 to move from the second end to the first end along the axial direction of the valve sleeve 4. That is, the laser emission port 323 of the laser rangefinder 32 moves along the opening direction of the window 211. Therefore, the inner diameters of the valve sleeve 4 at different sleeve depths can be measured, and the inner diameter of the valve sleeve 4 at a certain sleeve depth can be measured repeatedly.

[0035] In one embodiment of the utility model, the first end 321 of the laser rangefinder 32 is fixedly mounted on the first piston rod 222, and the second end 322 of the laser rangefinder 32 opposite to the first end 321 is provided with a laser emission port 323. The distance from the first end 321 to the second end 322 of the laser rangefinder 32 is equal to the radius of the cylinder 21, and the laser emission port 323 is horizontally directed toward the outside of the cylinder 21 through the window 211 of the cylinder 21. The sum of the measured distance A and distance B and the inner diameter Z of the cylinder 21 is the inner diameter of a certain position of the valve sleeve 4. The cylinder 21 is a standard cylindrical bushing with an inner diameter Z = 100 mm. That is, the inner diameter of the valve sleeve 4 = 100 mm + A + B. The measurement and calculation process can be simplified, and the calculation result is more accurate.

[0036] In summary, the utility model is a device for measuring the inner diameter and roundness of a valve sleeve, and the scale of the measuring disk 31 is shown in FIG. Figure 4As shown, the upper end surface has a scale, which can be accurate to 5°. The valve sleeve 4 to be measured is placed, and a bearing 33 is provided under the measuring disk 31, which can rotate the valve sleeve 4 to any angle. Measurement principle:

[0037] (1) The valve sleeve 4 to be measured is placed on the measuring plate 31. The laser rangefinder 32 shall not interfere with the valve sleeve 4 during the rotation process.

[0038] (2) Generally, four points on the circumference of the valve sleeve 4 can be measured. If higher accuracy is required, eight points or more can be measured. Taking the measurement of four points on the circumference as an example, first adjust the dial to 0°.

[0039] (3) Slowly press the cover 225, and measure the distance A from the laser rangefinder 32 to the inner wall of the valve sleeve 4 in the vertical direction at the 0° position. During the downward movement, all distances in the vertical position at the 0° direction can be measured.

[0040] (4) Rotate the measuring disk 31 and the valve sleeve 4 to the 180° position, slowly press the cover 225, and measure the distance B from the laser rangefinder 32 to the inner wall of the valve sleeve 4 in the vertical direction at the 180° position. During the downward movement, all distances in the 180° direction can be measured.

[0041] (5) The diameter of the valve sleeve 4 is A+B+Z (Z is the rotation diameter of the laser rangefinder 32, which is the initial setting value and can be measured by a standard cylindrical bushing. For example, using a standard cylindrical bushing with an inner diameter of 100 mm, the A and B values ​​are measured, and the Z value is 100-AB).

[0042] (6) Rotate the measuring disk 31 and the valve sleeve 4 to the positions of 90° and 270° respectively to measure the distance data A' and B'.

[0043] Measurement data processing:

[0044] As shown in the following schematic diagram, the collected data is processed and the bushing size information can be obtained based on the image.

[0045] (1) The diameter of the valve sleeve 4 is A+B+Z.

[0046] (2) The roundness of the valve sleeve 4 at a certain cross section is (A+B)-(AA'+B').

[0047] (3) If the laser rangefinder 32 is moved downward, the local position increases or decreases, and other position data remain unchanged, it means that the valve sleeve 4 is partially deformed. Figure 5 .

[0048] (4) If the data gradually increases or decreases when the laser rangefinder 32 is moved downward, it means that the inner diameter of the valve sleeve 4 is gradually expanding or contracting. Figure 6 .

[0049] (5) Based on the measurement results, multiple data of the interior (inner wall) of the valve sleeve 4 can be obtained, which is rich in information and helpful for defect information identification and maintenance. In addition, the measuring device is also suitable for valve sleeves 4 with irregular internal structures, and has the characteristics of wide application.

[0050] The flow chart and block diagram in the accompanying drawings illustrate the possible implementation architecture, function and operation of the method and computer program product according to various embodiments of the utility model. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the module, the program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A device for measuring the inner diameter and roundness of a valve sleeve, characterized in that: include: A mounting platform (1), wherein the upper surface of the mounting platform (1) is a horizontal positioning surface (11); A sleeve assembly, the sleeve assembly comprising a cylinder (21) and a connecting rod assembly (22), the cylinder (21) being vertically inserted on the mounting platform (1), and the connecting rod assembly (22) being axially telescopically mounted on the cylinder (21); A measuring assembly, the measuring assembly comprising a measuring disk (31) and a laser rangefinder (32), the measuring disk (31) being arranged on the positioning table (11) and sleeved outside the cylinder (21), the laser rangefinder (32) being installed in the connecting rod assembly (22) so that a laser emission port (323) of the laser rangefinder (32) is horizontally directed toward the outside of the cylinder (21) through a window (211) corresponding to the cylinder (21).

2. The inner diameter and roundness measuring device according to claim 1, characterized in that: The upper part of the cylinder (21) extends out of the positioning table (11) of the mounting platform (1), and a long strip window (211) is opened axially on the corresponding side wall. The laser rangefinder (32) is installed on the connecting rod assembly (22), and the laser emission port (323) of the laser rangefinder (32) corresponds to the position of the window (211) of the cylinder (21) and can move along the opening direction of the window (211).

3. The inner diameter and roundness measuring device according to claim 2, characterized in that: The connecting rod assembly (22) includes at least one piston rod and a piston, one end of the piston rod is connected to the piston, the piston is arranged in the cylinder (21), and the lower end of the piston is correspondingly connected to a compression spring (23), the compression spring (23) is located in the cylinder (21), and the free end of the piston rod extends upward and out of the cylinder (21).

4. The inner diameter and roundness measuring device according to claim 3, characterized in that: The connecting rod assembly (22) comprises a first piston (221), a first piston rod (222), a second piston (223) and a second piston rod (224) which are arranged in sequence from bottom to top in the cylinder (21); the compression spring (23) is arranged in the cylinder (21) corresponding to the lower side of the first piston (221); the first piston (221) is connected to the first piston rod (222); the second piston (223) is connected to the second piston rod (224); the free end of the first piston rod (222) is connected to the second piston (223); the free end of the second piston rod (224) extends vertically upward and out of the cylinder (21).

5. The inner diameter and roundness measuring device according to claim 4, characterized in that: The connecting rod assembly (22) also includes a cover (225), which is coaxially fitted and buckled on the upper end of the cylinder (21) so that the free end of the second piston rod (224) and the closed end (2251) of the cover (225) away from the second piston (223) are in contact.

6. The inner diameter and roundness measuring device according to claim 5, characterized in that: A positioning block (2252) is provided in the middle of the closed end (2251) of the cover (225), and the positioning block (2252) is provided with a positioning blind hole, and the free end of the second piston (223) is inserted into the positioning blind hole of the positioning block (2252).

7. The inner diameter and roundness measuring device according to claim 6, characterized in that: The first end (321) of the laser rangefinder (32) is fixedly mounted on the first piston rod (222); the second end (322) of the laser rangefinder (32) opposite to the first end (321) is provided with the laser emission port (323); the distance from the first end (321) to the second end (322) of the laser rangefinder (32) is equal to the radius of the cylinder (21); the laser emitted by the laser emission port (323) passes through the window (211) of the cylinder (21) and is horizontally emitted toward the outside of the cylinder (21) and the inner wall of the valve sleeve (4) to be tested.

8. The inner diameter and roundness measuring device according to claim 7, characterized in that: The axial length of the cover (225) is greater than or equal to the axial length of the valve sleeve (4) to be tested. When the cover (225) vertically presses downward or releases the free end of the second piston rod (224), the first piston rod (222) moves axially in the cylinder (21), driving the laser rangefinder (32) to move along the axial direction of the valve sleeve (4) from one end to the other end of the valve sleeve (4).

9. The inner diameter and roundness measuring device according to claim 8, characterized in that: The first piston rod (222) and the second piston rod (224) are both inserted in the central axial direction of the cylinder (21); the cylinder (21) is a standard cylindrical bushing with an inner diameter Z=100 mm.

10. The inner diameter and roundness measuring device according to claim 1, characterized in that: The measuring disc (31) is arranged on the positioning table surface (11) of the mounting table (1) via a bearing (33); the measuring disc (31) comprises at least scale marks of 0°, 90°, 180° and 270°.

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