High-precision scanning industrial CT clamp for small sample detection

Abstract

The utility model discloses a high-precision scanning industrial CT clamp for small sample detection. Wherein the upper end of the lengthened sleeve rod is in threaded connection with a connecting seat of the clamping structure, the lower end of the lengthened sleeve rod is mounted in a sleeve rod mounting bolt hole through threaded connection, and the sleeve rod mounting bolt hole is formed in the upper end of the base; a connecting seat mounting threaded hole is formed in the lower end of a connecting seat in the clamping structure, the upper end of the connecting seat is rigidly connected with a threaded ring, and the threaded ring is matched and connected with the inner side of the lower part of a closing sleeve through a threaded part; the upper part of the closing sleeve is of a circular truncated cone-shaped hollow structure; an opening through which the sample containing device can penetrate is formed in the top of the closing sleeve; the three elastic clamping claws are installed on the upper end face of the threaded ring in a pressing mode, and the roots of the three elastic clamping claws are connected through springs. According to the utility model, stable clamping of samples with different sizes is realized; and the requirements of high-precision scanning, short-distance scanning and small-range scanning of small samples are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary equipment for testing or analyzing materials by using wave or particle radiation, and particularly relates to a high-precision scanning industrial CT fixture for small sample detection. Background Technique

[0002] Industrial CT is a three-dimensional imaging technology applied to industrial non-destructive testing. Its working principle is to perform tomographic scanning and digital processing on a workpiece to truly reflect the internal structure of the workpiece, the presence or absence of defects, and defect information, etc.

[0003] With the wide application of industrial CT, the detection accuracy requirements for small samples are getting higher and higher. Therefore, during the detection process, it is necessary to keep the sample as close as possible to the ray emission window, increase the optical magnification as much as possible, and reduce the detection area, so as to improve the spatial resolution and achieve high-precision detection of small samples; at the same time, it is also necessary to ensure that the small sample does not contact or collide with the ray machine housing during the 360° rotation detection to avoid damaging the sample, fixture or ray window. The samples of existing industrial CTs are fixed and placed on a tray, which cannot meet the requirements of high-precision detection, stable placement, and high-resolution scanning rotation centering of millimeter-level small samples. Therefore, there is an urgent need for a fixture for high-precision scanning of industrial CT with a minimum diameter of 0.5 mm for small samples to realize the stable clamping of samples of different sizes, small focal length and short-distance scanning, and solve the requirements of high-precision scanning, short distance, and small-range scanning of small samples. Summary of the Utility Model

[0004] Aiming at the problems in the background technique, the utility model provides a high-precision scanning industrial CT fixture for small sample detection with a compact, convenient, and easy-to-operate structure, adjustable fixture height, variable clamping range, and stable clamping. The technical solution includes: an extension sleeve rod and a clamping structure. The upper end of the extension sleeve rod is connected to the connecting seat of the clamping structure by a thread, and the lower end of the extension sleeve rod is installed in the sleeve rod mounting bolt hole by a thread. The sleeve rod mounting bolt hole is opened at the upper end of the base.

[0005] The clamping structure includes: a connecting seat, a closing sleeve, elastic clamping claws, a spring, and a threaded ring. The lower end of the connecting seat is provided with a connecting seat mounting threaded hole. The upper end of the connecting seat is rigidly connected to the threaded ring, and the threaded ring is in threaded partial fit connection with the inner side of the lower part of the closing sleeve; the upper part of the closing sleeve is a hollow structure in the shape of a frustum of a cone, and the top of the closing sleeve is provided with an opening through which the sample holding device can pass; three elastic clamping claws are tightly installed on the upper end face of the threaded ring, and springs are connected between the roots of the three elastic clamping claws.

[0006] The lengthened sleeve rod includes: a first connecting rod, a screwing nut, and a second connecting rod. The screwing nut is fixed at the top end of the second connecting rod. The first connecting rod and the second connecting rod are in clearance fit, and the first connecting rod passes through the screwing nut and inserts into the second connecting rod. Two radial openings are provided at the upper end of the second connecting rod, so that the upper end of the second connecting rod is divided into two parts. A screwing thread is provided on the outside of the upper end of the second connecting rod, and the screwing nut is matched with the screwing thread.

[0007] The lower end of the second connecting rod and the upper end of the first connecting rod are respectively a base mounting thread and a clamping mounting thread. The base mounting thread is matched with the sleeve rod mounting bolt hole, and the clamping mounting thread is matched with the connecting seat mounting thread hole at the lower end of the connecting seat.

[0008] A tray mounting screw is provided at the center of the lower end face of the base, and the tray mounting screw is connected to the tray connecting the industrial CT sample placement area.

[0009] The sample holding device includes: a strip-shaped thin tube, an upper plug, and a lower plug. A powdered sample is provided in the space enclosed by the strip-shaped thin tube, the upper plug, and the lower plug.

[0010] The outer diameter of the strip-shaped thin tube is 2 mm, and the internal dimensions of the strip-shaped thin tube are φ1.5 mm * 3 mm.

[0011] The sample holding device includes: an integrally formed small tray and a fixing rod. The upper end of the fixing rod is arranged at the center of the lower end of the small tray. A small sample is placed on the small tray, and the fixing rod is clamped between three elastic clamping claws.

[0012] The beneficial effects of the present utility model are as follows: The height and clamping diameter can be adjusted according to the size of the sample to be inspected, the detection object is flexible and variable, and stable clamping of samples of different sizes can be achieved; it solves the requirements for high-precision scanning, short-distance, and small-range scanning of small samples. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of Embodiment 1 of a high-precision scanning industrial CT fixture for small sample detection of the present utility model;

[0014] Figure 2 It is a partial structural diagram of Embodiment 1 of the present utility model;

[0015] Figure 3 It is a partial structural diagram of Embodiment 2 of the present utility model.

[0016] Wherein: 1 - base, 1.1 - sleeve rod mounting bolt hole, 2 - extension sleeve rod, 2.1 - first connecting rod, 2.2 - second connecting rod, 2.3 - screwing nut, 3 - clamping structure, 3.1 - connecting seat, 3.2 - closing sleeve, 3.3 - elastic clamping jaw, 3.4 - spring, 3.5 - threaded ring, 4 - tray, 5 - sample holding device, 511 - strip-shaped thin tube, 521 - fixing rod, 522 - small tray. Detailed implementation manners

[0017] The following further elaborates on the present utility model in conjunction with the attached drawings.

[0018] As Figure 1 shown in Embodiment 1 of the present utility model, it includes: an extension sleeve rod 2 and a clamping structure 3. The lower end of the extension sleeve rod 2 is installed in the sleeve rod mounting bolt hole 1.1 by means of threaded connection. The upper end of the extension sleeve rod 2 is threadedly connected to the connecting seat 3.1 of the clamping structure 3, which is used for height adjustment to meet the needs of sample detection and can adjust the length according to the actual detection situation and requirements.

[0019] The clamping structure 3 is used for clamping small samples and keeping them stable, and is also used for connecting the connecting rods and small samples. The clamping structure can adjust the clamping diameter to cooperate with small samples in the clamping diameter range of 0.5 mm to 3 mm.

[0020] Figure 1 The middle base 1 and the tray 4 are both part of the industrial CT accessories. The upper end of the base 1 is provided with a sleeve rod mounting bolt hole 1.1, and the center of the lower end face of the base 1 is provided with a tray mounting screw rod (not shown in the figure). The tray mounting screw rod is used to connect to the tray 4 in the sample placement area of the industrial CT and keep the bottom of the fixture stable.

[0021] The lengthening sleeve rod 2 includes: a first connecting rod 2.1, a screwing nut 2.3 and a second connecting rod 2.2. The screwing nut 2.3 is fixed at the top end of the second connecting rod 2.2. There is a clearance fit between the first connecting rod 2.1 and the second connecting rod 2.2. The first connecting rod 2.1 passes through the screwing nut 2.3 and is inserted into the second connecting rod 2.2. Two radial openings (not shown in the figure) are provided at the upper end of the second connecting rod 2.2, so that the upper end of the second connecting rod 2.2 is divided into two petals. There is a screwing thread (not shown in the figure) outside the upper end of the second connecting rod 2.2. The screwing nut 2.3 is matched with the screwing thread. When the screwing nut 2.3 is gradually tightened downward, the two petal ends at the upper end of the second connecting rod 2.2 gradually approach each other to lock the relative position between the first connecting rod 2.1 and the second connecting rod 2.2. When the screwing nut 2.3 is loosened upward, the first connecting rod 2.1 and the second connecting rod 2.2 can move relative to each other, so as to realize the adjustment of the overall length of the lengthening sleeve rod 2, and further realize the adjustment of the height of the small sample above. The lower end of the second connecting rod 2.2 and the upper end of the first connecting rod 2.1 are respectively a base mounting thread (not shown in the figure) and a clamping mounting thread (not shown in the figure). The base mounting thread is matched with the sleeve rod mounting bolt hole 1.1, and the clamping mounting thread is matched with the connecting seat mounting thread hole (not shown in the figure) at the lower end of the connecting seat 3.1.

[0022] The clamping structure 3 includes: a connecting seat 3.1, a closing sleeve 3.2, elastic clamping claws 3.3, a spring 3.4 and a threaded ring 3.5. The lower end of the connecting seat 3.1 is connected to the lengthening sleeve rod 2 through the connecting seat mounting thread hole. The upper end of the connecting seat 3.1 is rigidly connected to the threaded ring 3.5. By matching the threaded ring 3.5 with the threaded part on the inner side of the lower part of the closing sleeve 3.2, the up and down movement and tightening of the threaded ring 3.5 are realized. The upper part of the closing sleeve 3.2 is a hollow structure in the shape of a frustum of a cone. An opening is provided at the top of the closing sleeve 3.2 through which the sample holding device can pass.

[0023] Three elastic clamping claws 3.3 are pressed and arranged on the upper end surface of the threaded ring 3.5. The roots of the three elastic clamping claws 3.3 are connected by a spring 3.4. Due to the elastic force of the spring 3.4, a lever structure is formed between the middle parts of the adjacent elastic clamping claws 3.3, and their clamping and releasing are controlled by the closing sleeve 3.2. When the closing sleeve 3.2 is fixed, the tops of the adjacent elastic clamping claws 3.3 are in a static holding state (a state where the clamping diameter remains unchanged). The sample holding device is vertically clamped and fixed in the middle of the 3 elastic clamping claws. The sample is placed in the sample holding device.

[0024] When it is necessary to clamp or remove the sample, the closing sleeve 3.2 and the threaded ring 3.5 change or fix their positions through threaded cooperation, so that the elastic clamping claws 3.3 clamp or loosen. Specifically in this embodiment, keeping the threaded ring 3.5 in a fixed state, turning the closing sleeve 3.2 clockwise, the closing sleeve 3.2 will move downward, and the three elastic clamping claws 3.3 will move inward relative to each other along the frustum shape on the upper part of the closing sleeve 3.2, ensuring that the sample holding device is clamped by the elastic clamping claws and is stable without shaking. When it is necessary to remove the sample, also keep the threaded ring 3.5 in a fixed state, turn the closing sleeve 3.2 counterclockwise, the closing sleeve 3.2 will move upward, and the three elastic clamping claws 3.3 will gradually loosen along the frustum shape on the upper part of the closing sleeve 3.2, and then the sample holding device can be released and removed. The above three states can ensure the clamping, fixing and releasing of samples with different diameters.

[0025] As Figure 2 shown in Embodiment 1 of the present utility model, the sample holding device 5 includes: a strip-shaped thin tube 511, an upper plug and a lower plug. The outer diameter of the strip-shaped thin tube is 2 mm, and the internal size of the strip-shaped thin tube is φ1.5 mm * 3 mm. A powdered sample is provided in the space enclosed by the strip-shaped thin tube 511, the upper plug and the lower plug.

[0026] During operation, first place an appropriate amount of powdered sample in the strip-shaped thin tube (sample holding device), and block both ends of the thin tube. Then carry out the installation: first connect the extension sleeve rod and the clamping structure, and at the same time install the base at the industrial CT sample placement area on the tray; then install the sample holding device in the clamping structure, and install the extension sleeve rod on the base; finally, adjust the length of the extension sleeve rod according to the position of the detection area to ensure that the position where the sample is placed is at an appropriate detection height.

[0027] Specifically during installation: the connecting seat 3.1 is installed at the top of the extension sleeve rod 2; at the same time, the base 1 is installed on the tray 4;

[0028] Connect the roots of the 3 elastic clamping claws 3.3 through 3 springs 3.4, place them on the threaded ring 3.5, and turn the closing sleeve 3.2 to make it in a static holding state;

[0029] Then place the strip-shaped thin tube between the three elastic clamping claws 3.3, and ensure that the area containing the sample cannot be blocked by the elastic clamping claws; then turn the closing sleeve 3.2 to ensure that the small sample is clamped by the elastic clamping claws 3.3 and is stable without shaking; and install the extension sleeve rod 2 in the sleeve rod installation bolt hole 1.1;

[0030] Finally, according to the position of the detection area and the size of the ray housing, adjust the length of the extension rod 2 to ensure that the powder sample is at an appropriate height, enabling 360° stability and being as close as possible to the ray window without collision. During this process, the stability of the powder sample without shaking needs to be ensured, so the clamping action must be stable and reliable.

[0031] After the installation of the embodiment is completed, close the lead door of the industrial CT, adjust the mechanical movement mechanism of the industrial CT to move the sample to be inspected to an appropriate position for industrial CT detection. If necessary, open the lead door for fine adjustment of the fixture and adjust the position state such as the height of the powder sample.

[0032] As Figure 3 In the shown Example 2, the un-described parts are the same as those in Example 1. The difference is that in Example 2, a small tray device is used as the holding device for small samples. The sample holding device 5 includes: an integrally formed small tray 522 and a fixing rod 521. The upper end of the fixing rod 521 is arranged at the center of the lower end of the small tray 522. The small sample is placed on the small tray 522, and the fixing rod 521 is clamped between three elastic clamping claws 3.3.

[0033] The installation process is basically the same as that in Example 1, except that the small sample is first placed on the small tray, and then the height of the small sample is adjusted according to the position of the ray window.

Claims

1. A high-precision scanning industrial CT fixture for small sample detection, characterized in that: include: An extended sleeve rod (2) and a clamping structure (3), wherein the upper end of the extended sleeve rod (2) is connected to a connecting seat (3.1) of the clamping structure (3) by means of a thread, and the lower end of the extended sleeve rod (2) is installed in a sleeve rod installation bolt hole (1.1) by means of a threaded connection, and the sleeve rod installation bolt hole (1.1) is opened at the upper end of the base (1); The clamping structure (3) comprises: a connecting seat (3.1), a closing sleeve (3.2), an elastic clamping claw (3.3), a spring (3.4) and a threaded ring (3.5), wherein the lower end of the connecting seat (3.1) is provided with a connecting seat mounting threaded hole, the upper end of the connecting seat (3.1) is rigidly connected to the threaded ring (3.5), and the threaded ring (3.5) is connected to the inner side of the lower part of the closing sleeve (3.2) through a threaded part; the upper part of the closing sleeve (3.2) is a hollow structure in the shape of a truncated cone, and the top of the closing sleeve (3.2) is provided with an opening through which a sample holding device can pass; three elastic clamping claws (3.3) are pressed and installed on the upper end surface of the threaded ring (3.5), and the roots of the three elastic clamping claws (3.3) are connected by springs (3.4).

2. A high-precision scanning industrial CT fixture for small sample detection according to claim 1, characterized in that: The extended sleeve rod (2) comprises: a first connecting rod (2.1), a screwing nut (2.3) and a second connecting rod (2.2), wherein the screwing nut (2.3) is fixed at the top end of the second connecting rod (2.2), the first connecting rod (2.1) and the second connecting rod (2.2) are clearance-matched, and the first connecting rod (2.1) passes through the screwing nut (2.3) and is inserted into the second connecting rod (2.2); the upper end of the second connecting rod (2.2) is provided with two radial openings, thereby dividing the upper end of the second connecting rod (2.2) into two halves, and the upper end of the second connecting rod (2.2) is provided with a screwing thread on the outside, and the screwing nut (2.3) matches the screwing thread.

3. A high-precision scanning industrial CT fixture for small sample detection according to claim 2, characterized in that: The lower end of the second connecting rod (2.2) and the upper end of the first connecting rod (2.1) are respectively provided with a base mounting thread and a clamping mounting thread, the base mounting thread cooperates with the sleeve rod mounting bolt hole (1.1), and the clamping mounting thread cooperates with the connection seat mounting thread hole at the lower end of the connection seat (3.1).

4. The high-precision scanning industrial CT fixture for small sample detection according to claim 1 is characterized in that: The sample holding device (5) comprises: a strip-shaped capillary tube (511), an upper plug and a lower plug, and a powdered sample is arranged in a space surrounded by the strip-shaped capillary tube (511), the upper plug and the lower plug.

5. A high-precision scanning industrial CT fixture for small sample detection according to claim 4, characterized in that: The outer diameter of the strip-shaped capillary tube (511) is 2 mm, and the inner size of the strip-shaped capillary tube is φ1.5 mm*3 mm.

6. The high-precision scanning industrial CT fixture for small sample detection according to claim 1, characterized in that: The sample holding device (5) comprises: an integrally formed small tray (522) and a fixing rod (521), the upper end of the fixing rod (521) being arranged at the center of the lower end of the small tray (522), the small sample being placed on the small tray (522), and the fixing rod (521) being clamped between three elastic clamping claws (3.3).

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