CN205785736U - A test steel pipe fixing device - Google Patents

Abstract

The utility model discloses a test steel pipe fixing device, which comprises a base, a clamp and a positioning mechanism. A clamp is fixed on the top of the base, and the test steel tube is installed in the clamp. The positioning mechanism for axial and radial movement of the steel pipe; the fixture includes a lower fixture and an upper fixture. The lower fixture is installed on the top of the base. The upper part of the lower fixture of the upper steel section is equipped with an upper fixture, and the lower part of the upper fixture is provided with an upper channel with a semicircular cross section, and a lower steel section is arranged in the upper channel, and the lower steel section and the upper steel section are correspondingly spliced into a Tube hole, test steel pipe can be installed in the tube hole. The beneficial effects of the utility model are: it can limit the radial and axial movement of the test steel pipe, realize the rigid positioning of both ends of the test steel pipe, and improve the accuracy of the test; the fixture includes a plurality of steel sections of different sizes, which can be used for Test steel pipe, strong versatility.

Description

A test steel pipe fixing device

technical field

The utility model relates to the technical field of test equipment, in particular to a test steel pipe fixing device which limits the axial and radial movement of the steel pipe.

Background technique

Steel pipes are widely used basic components in important engineering structures such as petrochemical pipe networks and offshore platform supports, and they will inevitably suffer accidental impacts during their work. In order to study the deformation mechanism and failure mode of steel pipes, when conducting lateral impact tests of steel pipes, a series of steel pipes with span outer diameter ratio and diameter to thickness ratio are often used for experiments. Under the requirements of multi-working conditions experiments, standard test equipment and supporting test fixtures often do not have general versatility. Rigid fixing of both ends of different experimental steel pipes is often difficult to fully meet the fixing requirements. Replacement of steel pipes with different diameters The test consumes a lot of manpower and material resources; and, in the impact test of the steel pipe, it is difficult to control the deformation position of the steel pipe. Therefore, it is necessary to improve the prior art.

Contents of the invention

The purpose of the utility model is to provide a test steel pipe fixing device with a simple structure, a wide range of application, and a limit to the axial and radial movement of the steel pipe.

The technical solution adopted by the utility model is: a test steel pipe fixing device, including a base, a clamp and a positioning mechanism, the top of the base is fixed with a clamp, the test steel tube is installed in the clamp, and the test steel tube is located at the two ends of the clamp A positioning mechanism is installed to limit the axial and radial movement of the test steel pipe.

According to the above scheme, the clamp includes a lower clamp, an upper clamp and a positioning mechanism. The lower clamp is installed on the top of the base to install the lower clamp. The upper steel section is arranged in the groove, and the section of the upper steel section is semicircular; the upper fixture is installed on the upper part of the lower fixture, and the lower part of the upper fixture is provided with an upper channel with a semicircular section. The through slots are arranged facing each other; the lower steel section is arranged in the upper through slot, and the cross section of the lower steel section is semicircular; the lower steel section and the upper steel section are correspondingly spliced into pipe holes, and test steel pipes can be installed in the pipe holes. Both ends of the steel pipe protrude from the pipe hole; the positioning mechanism is installed at both ends of the test steel pipe.

According to the above scheme, the positioning mechanism includes a pin that crosses the test steel pipe, and two big head bolts. The two ends of the bolt are respectively inserted into the head of a big head bolt. The bolt body of the big head bolt cooperates with the nut, and the outer end surface of the nut It can be close to the side wall of the upper fixture and/or the lower fixture; the bolt is perpendicular to the bolt body of the big head bolt.

According to the above scheme, the positioning mechanism includes a steel plug and a T-shaped steel plug puller, the size of the big end of the steel plug puller is larger than the size of the test steel pipe, the big end of the steel plug puller is located outside the test steel pipe, and the other end of the steel plug puller is It is fixedly connected with the steel plug, and the steel plug is installed inside the test steel pipe.

According to the above scheme, a plurality of upper steel sections are sequentially arranged along the radial direction of the lower passage in the lower passage, and two adjacent upper steel sections are close to each other; the cross section of the upper steel section is semicircular, and each upper steel section The radius of the section decreases gradually from bottom to top; inside the upper channel, there are a plurality of lower steel sections sequentially arranged along the radial direction of the upper channel, and two adjacent lower steel sections are close to each other; the section of the lower steel section is half Circular, the section radius of each lower steel section gradually decreases from top to bottom; each lower steel section can be spliced with one of the upper steel sections to form a pipe hole.

According to the above scheme, the upper clamp and the lower clamp are connected by connecting bolts.

Compared with the prior art, the beneficial effects of the utility model are as follows: 1. The utility model adopts a clamp and a positioning mechanism, which can limit the radial and axial movement of the test steel pipe, realize the rigid fixation of both ends of the test steel pipe, and improve the test efficiency. Accuracy; the fixture includes multiple steel sections of different sizes, which can be used for test steel pipes of different sizes, and has strong versatility; 2. In the impact test of the test steel pipe, the steel plug can reduce the deformation of the test steel pipe at the clamping end, and the steel The plug and steel plug can be used for many times, saving cost; 3. The plug pin and the big head bolt are easy to disassemble; 4. By adjusting the position of the base and the fixture, it can meet the test of steel pipes with any span and outer diameter ratio; 5. This practical The new structure is reasonable in design, easy to use and strong in versatility.

Description of drawings

Fig. 1 is a structural schematic diagram of a specific embodiment of the present invention.

Fig. 2 is a schematic diagram of the installation of the test steel pipe in this embodiment.

Fig. 3 is a schematic diagram of the position of the steel plug and the lower clamp in this embodiment.

Fig. 4 is a schematic diagram of the connection of the upper clamp and the lower clamp in this embodiment.

Fig. 5 is a schematic diagram of the connection between the steel plug and the steel plug in this embodiment.

Fig. 6 is a front view of Fig. 5 .

Fig. 7 is a schematic diagram of the connection between the bolt and the big head bolt in this embodiment.

Fig. 8 is a front view of Fig. 7 .

Among them: 1. Base; 2. Upper clamp; 3. Latch; 4. Steel plug; 5. Thumb bolt; 6. Upper steel section; 7. Steel plug pull; 8. Connecting bolt; 9. Lower clamp; Lower steel section; 11, test steel pipe; 12, nut.

detailed description

In order to better understand the utility model, the utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

A kind of test steel pipe fixing device as described in Figure 1, comprises base 1, clamp and positioning mechanism, and the top of base 1 is fixed fixture, and described test steel pipe 11 is installed in the clamp, and described positioning mechanism is installed on both sides of clamp. On the end of the test steel pipe 11.

In this embodiment, as shown in Figure 4, the fixture includes a lower fixture 9 and an upper fixture 2, the lower fixture 9 is fixed on the top of the base 1, and the upper part of the lower fixture 9 is provided with a lower through groove with a semicircular cross section. A plurality of upper steel sections 6 are sequentially arranged in the through groove along the radial direction of the lower through groove, and two adjacent upper steel sections 6 are close to each other; the cross section of the upper steel sections 6 is semicircular, and each upper steel section 6 is concentric, and The section radius decreases gradually from bottom to top. The upper part of the lower fixture 9 is equipped with an upper fixture 2 (fixed by four connecting bolts 8), and the lower part of the upper fixture 2 is provided with an upper channel with a semicircular cross-section, and the upper channel is arranged opposite to the lower channel; A plurality of lower steel sections 10 are sequentially arranged in the through groove along the radial direction of the upper through groove, and two adjacent lower steel sections 10 are close to each other; the cross section of the lower steel sections 10 is semicircular, and each lower steel section 10 is concentric, and The section radius gradually decreases from top to bottom, as shown in Figure 2-4. Each lower steel section 10 can be spliced with one of the upper steel sections 6 to form a pipe hole, and a test steel pipe 11 can be installed in the pipe hole, as shown in Figure 2-3; the size of the upper steel section 6 and the lower steel section 10 is based on the test The dimension design of steel pipe 11. The upper steel section 6 and the lower steel section 10 can form pipe holes of various specifications, so as to adapt to test steel pipes 11 of different pipe diameters. Both ends of the test steel pipe 11 protrude from the pipe hole; the positioning mechanism is installed at both ends of the test steel pipe 11 .

In this embodiment, as shown in Figures 7 and 8, the positioning mechanism includes a bolt 3 that traverses the test steel pipe 11 (the test steel pipe 11 is provided with a through hole that matches the bolt 3), and two stud bolts 5, the bolt 3 The two ends of each insert the head of a big head bolt 5, and the bolt body of big head bolt 5 cooperates with nut 12, and the outer end surface of nut 12 can be close to the side wall of upper fixture 2 and/or lower fixture 9; Said latch 3 Perpendicular to the bolt body of the tack bolt 5. Adjusting the position of the nut 12 on the bolt body of the big head bolt 5 can control the axial movement of the test steel pipe 11: if the nuts 12 at both ends of the test steel pipe 11 are in close contact with the side walls of the upper fixture 2 and/or the lower fixture 9, the test Axial positioning of the steel pipe 11; if the nuts 12 at both ends of the test steel pipe 11 are not in close contact with the side walls of the upper fixture 2 and/or the lower fixture 9, that is, when there is a gap, the test steel pipe 11 can move axially.

When the test steel pipe 11 is subjected to an impact test at both ends, in order to avoid deformation of the test steel pipe 11 at the clamping end or reduce the degree of deformation as much as possible, a steel plug 4 is usually installed in the steel pipe. As shown in Figures 5 and 6, the fixing device also includes a steel plug 4 and a T-shaped steel plug 7, the size of the large end of the steel plug 7 exceeds the size of the test steel pipe 11, and the large end of the steel plug 7 is located at Outside the end face of the test steel pipe 11, the other end of the steel plug 7 is fixedly connected with the steel plug 4, and the steel plug 4 extends into the inside of the test steel pipe 11. The specific position of the steel plug 4 in the test steel pipe 11 is determined according to the actual test requirements.

As shown in Figure 1, two sets of fixtures are included in this embodiment, and the installation of the two sets of fixtures depends on the actual test requirements (such as by moving the positions of the two sets of bases and fixtures, it can meet the requirements of any span. Diameter ratio steel pipe test); the test steel pipe 11 is installed on the two fixing devices. This embodiment takes the end impact test of the test steel pipe as an example, and the specific installation process is as follows:

1. Install two sets of bases 1 at intervals according to the test requirements, and install the lower fixture 9 at the corresponding position on the top of the base 1 .

2. According to the outer diameter of the test steel pipe 11, select the upper steel section 6 and the lower steel section 10 of appropriate size, so that the test steel pipe 11 can be placed in the pipe hole formed by the upper steel section 6 and the lower steel section 10; The upper steel segment 6 is installed in the upper clamp 2, and the selected lower steel segment 10 is installed in the lower clamp 9.

3. Install the two ends of the test steel pipe 11 on the two lower steel sections 10 respectively, and install the upper fixture 2 on the lower fixture 9 through the connecting bolt 8 .

4. Insert the steel plug 4 into the inside of the test steel pipe 11, and make the steel plug 4 close to the position inside the fixture; the steel plug puller 7 is close to the bottom inner wall of the test steel tube 11.

5. Pass the bolt 3 through the through hole of the test steel pipe 11, assemble the two ends of the bolt 3 with the thumb bolts 5, and adjust the nut 12 to position the test steel pipe 11 to limit the axial movement of the test steel pipe 11.

6. Start the impact test on the end of steel pipe 11.

Although the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive. Such as: change the thickness of the semi-circular steel section of the fixture, change the length of the steel plug and the way of plugging, change the form of the big head screw, etc. Those of ordinary skill in the art come under the inspiration of the utility model, and implementations that do not depart from the gist of the utility model and the scope of protection of the claims are all within the protection scope of the utility model.

Claims (6)

1. a test steel tube fixing device, it is characterized in that, including pedestal, fixture and detent mechanism, the top of described pedestal is fixed with fixture, installing described test steel pipe in fixture, test steel pipe is positioned at the part at fixture two ends and is provided with the detent mechanism that limit assay steel pipe is axial and moves radially.

2. a kind of test steel tube fixing device as claimed in claim 1, it is characterized in that, described fixture includes lower clamp and upper fixture, described lower clamp is arranged on the top of pedestal, it is semicircular lower groove that the top of lower clamp offers cross section, being configured with steel section in lower groove, the cross section of upper steel section is semicircle；Fixture is installed on the top of described lower clamp, and it is semicircular upper groove that the bottom of upper fixture offers cross section, and upper groove and lower groove are just to layout；Being configured with lower steel section in upper groove, the cross section of lower steel section is semicircle；Described lower steel section be spliced into pore corresponding with upper steel section, in pore can installation test steel pipe, test steel pipe two ends stretch out pore；Described detent mechanism is arranged on the two ends of test steel pipe.

3. a kind of test steel tube fixing device as claimed in claim 2, it is characterized in that, described detent mechanism includes the latch crossing test steel pipe, and two stud bolts, the head of a stud bolt is respectively inserted at the two ends of described latch, the bolt body of stud bolt and nut screw connection, the end face outside of nut can be adjacent to the sidewall of upper fixture and/or lower clamp；Described latch is perpendicular with the bolt body of stud bolt.

4. a kind of test steel tube fixing device as claimed in claim 1, it is characterized in that, described fixing device includes steel plug and T-shaped steel plug, the stub end size of steel plug is more than the size of test steel pipe, the stub end of steel plug is positioned at the outside of test steel pipe, the other end of steel plug is connected with steel plug, and steel plug is arranged on the inside of test steel pipe.

5. a kind of test steel tube fixing device as claimed in claim 2, it is characterised in that in described lower groove, the radial direction along lower groove is configured with multiple upper steel section successively, and adjacent two upper steel sections are close to；The cross section of upper steel section is semicircle, and the section radius of each upper steel section is gradually reduced from bottom to top；In described upper groove, the radial direction along upper groove is configured with multiple lower steel section successively, and adjacent two lower steel sections are close to；The cross section of lower steel section is semicircle, and the section radius of each lower steel section is gradually reduced from top to bottom；Each lower steel Duan Keyu on one of them steel section correspondence be spliced into pore.

6. a kind of test steel tube fixing device as claimed in claim 2, it is characterised in that described upper fixture is connected by connecting bolt with lower clamp.