CN108801910B

CN108801910B - Thread detection device for internal thread sleeve

Info

Publication number: CN108801910B
Application number: CN201810325252.XA
Authority: CN
Inventors: 李彬
Original assignee: Luoyang Institute of Science and Technology
Current assignee: Heilongjiang Shenghui Metrology Detection Technology Service Co ltd
Priority date: 2018-04-12
Filing date: 2018-04-12
Publication date: 2020-06-02
Anticipated expiration: 2038-04-12
Also published as: CN108801910A

Abstract

The invention relates to the field of detection and inspection equipment, in particular to a thread detection device for an internal thread sleeve. Comprises a sliding column, a sleeve arranged on the sliding column in a sliding way, a top beam fixed on the sleeve and a base fixed at the lower end of the sliding column; the lower edge of the top beam is provided with an external thread column; a fixed torque wrench is arranged on the base, an external thread frustum is vertically fixed at the output end of the fixed torque wrench, the other end of the fixed torque wrench is fixedly connected with the upper end of a vertically arranged lifting shaft, the lower end of the lifting shaft can be slidably arranged in a shaft hole formed in the base in a penetrating manner, and a spline mechanism for preventing the lifting shaft from rotating is arranged between the lifting shaft and the shaft hole; the spring is sleeved outside the lifting shaft, one end of the spring is fixedly connected with the base, and the other end of the spring is fixedly connected with a tension sensor which is arranged at the lower end of the top torque wrench and used for measuring the tension of the spring. The invention is specially used for detecting and inspecting the internal thread sleeve, has high detection efficiency and good accuracy, and saves manpower and material resources.

Description

Thread detection device for internal thread sleeve

Technical Field

The invention relates to the field of detection and inspection equipment, in particular to a thread detection device for an internal thread sleeve.

Background

In the production process of the internal thread sleeve, due to equipment or artificial reasons, burrs or fractures are easily generated on the thread wire inside the internal thread sleeve, the use and sealing performance of the internal thread sleeve are influenced, and potential safety hazards are buried in a high-temperature high-pressure pipeline connected through the internal thread sleeve.

In order to avoid the defect products from flowing to the market, the thread inside the internally threaded sleeve needs to be efficiently and accurately inspected in the factory inspection process of the internally threaded sleeve. In the prior art, a special inspection tool is not available, manual spot check can only be relied on, and judgment is carried out through visual inspection mainly by means of the experience of an inspector, so that the inspection efficiency is low, and the accuracy is poor.

Disclosure of Invention

The invention aims to provide a thread detection device which is high in detection efficiency, good in accuracy and special for an internal thread sleeve.

In order to solve the technical problems, the invention adopts the technical scheme that: a thread detection device for an internal thread sleeve comprises a sliding column arranged in the vertical direction, a sleeve capable of sliding up and down along the sliding column, a top beam fixed on the sleeve and a base fixed at the lower end of the sliding column; a threaded hole is formed in the sleeve, and a screw for fixing the sleeve and the sliding column is arranged in the threaded hole in a matched mode; an external thread column which is fixedly connected with the upper end of the internal thread sleeve to be detected is arranged on the lower edge of the top beam along the vertical direction; the base is provided with a liftable fixed torque wrench, the output end of the fixed torque wrench is vertically and upwards arranged and fixed with an external thread frustum which is matched and installed with the lower end of an internal thread sleeve to be detected, the external thread frustum is coaxial with the external thread column, the small end of the external thread frustum is upwards arranged, the other end of the fixed torque wrench is fixedly connected with the upper end of a vertically arranged lifting shaft, the lower end of the lifting shaft can be slidably arranged in a shaft hole formed in the base in a penetrating manner, and a spline mechanism for preventing the lifting shaft from rotating is arranged between the lifting shaft and the shaft hole; the spring is sleeved outside the lifting shaft, one end of the spring is fixedly connected with the base, and the other end of the spring is fixedly connected with a tension sensor which is arranged at the lower end of the fixed torque wrench and used for measuring the tension of the spring.

Preferably, a hollow frame is arranged below the base.

Preferably, length scale marks are arranged on the sliding column along the length direction of the sliding column.

Preferably, the cross section of the sliding column and the cross section of the sleeve are both square.

Preferably, the tension sensor comprises a display screen for displaying the tension value.

Advantageous effects

The invention judges whether the thread of the internal thread sleeve to be detected has defects such as fracture or burr by utilizing whether the external thread frustum can completely penetrate through the internal thread sleeve to be detected under the driving of the fixed torque wrench. If the internal thread pipe can pass through the tension sensor completely, the spring tension measured by the tension sensor is the same, and the internal thread pipe to be measured can be judged to be qualified. If the sleeve cannot pass through the threaded wire completely after being blocked by burrs or fracture layers on the threaded wire, the spring tension measured by the tension sensor is smaller than a normal value, and the to-be-measured internal thread sleeve can be judged to be unqualified.

This use is novel can judge whether there is fracture or burr in the internal thread sleeve pipe thread silk through the reading on the force sensor, convenient operation, and the result is directly perceived, is favorable to big internal thread sleeve pipe accuracy of dispatching from the factory inspection in batches.

Drawings

FIG. 1 is a schematic structural view of the present invention;

the labels in the figure are: 1. the device comprises a top beam, 2, an external thread column, 3, an external thread frustum, 4, a fixed torque wrench, 5, a tension sensor, 6, a display screen, 7, a rack, 8, a base, 9, a lifting shaft, 10, a spring, 11, a sliding column, 12, a sleeve, 13 and a screw.

Detailed Description

As shown in fig. 1, the thread detecting device for the internal thread bushing of the present invention includes a sliding column 11 arranged along a vertical direction, a sleeve 12 capable of sliding up and down along the sliding column 11, a top beam 1 fixed on the sleeve 12, and a base 8 fixed at a lower end of the sliding column 11.

The cross-sections of the spool 11 and the sleeve 12 are square, so that the sleeve 12 is prevented from rotating relative to the spool 11, and accurate positioning is facilitated. The sleeve 12 is provided with a threaded hole, a screw 13 used for fixing the sleeve 12 and the sliding column 11 is installed in the threaded hole in a matched mode, in the preferred embodiment, length scale marks are arranged on the sliding column 11 along the length direction of the sliding column 11, the sleeve 12 and the top beam 1 can be lifted to different heights through internal thread sleeves with different lengths, then the positions are fixed through the screw 13, and the positions are accurately located through the length scale marks. Be equipped with along vertical direction at the lower edge of back timber 1 and be used for with the external screw thread post 2 of the internal thread sheathed tube upper end fixed connection that awaits measuring, the internal thread sheathed tube upper end that awaits measuring is through installing with external screw thread post 2 cooperation to internal thread sleeve pipe and back timber 1 fixed connection that will await measuring.

Be equipped with the fixed torque wrench 4 of liftable on base 8, the vertical upwards setting of output of fixed torque wrench 4 is fixed with the external screw thread frustum 3 that is used for with the internal thread sheathed tube lower extreme cooperation installation that awaits measuring, and external screw thread frustum 3 is coaxial and the tip upwards sets up with external screw thread post 2. In the testing process, decide that torque wrench 4 drives 3 screw in internal thread casings of external screw thread frustum, whether can run through the internal thread casing and touch with external screw thread post 2 through external screw thread frustum 3, whether the complete continuity of screw thread in the internal thread casing is judged because of burr or fracture layer blockking in the interim. The small end of the external thread frustum 3 is upwards arranged to be conveniently inserted into the internal thread sleeve to be tested, and a certain guiding effect is achieved.

In order to intuitively judge whether the external thread frustum 3 can completely penetrate through an internal thread sleeve to be detected, the other end of the fixed torque wrench 4 is fixedly connected with the upper end of a vertically arranged lifting shaft 9, the lower end of the lifting shaft 9 can be slidably arranged in a shaft hole formed in a base 8 in a penetrating manner, and a spline mechanism for preventing the lifting shaft 9 from rotating is arranged between the lifting shaft 9 and the shaft hole. The outside cover of axle 9 is equipped with spring 10, and spring 10's one end and base 8 fixed connection, the other end and set up and decide the tensile force sensor 5 fixed connection of torque wrench lower extreme and be used for surveing spring 10, and force sensor 5 includes a display screen 6 that is used for showing pulling force numerical value. If external screw thread frustum 3 can run through the internal thread sleeve pipe that awaits measuring completely and touch with the lower extreme of external screw thread post 2, then in the internal thread sleeve pipe testing process of same specification batch, the vertical equal or approximate the same of tensile force that shows on the display screen 6, if there is great difference in the numerical value that shows on the display screen 6, then because external screw thread frustum 3 is stopped by burr or fracture layer on the screw thread at the in-process that runs through the internal thread sleeve pipe, can not pass through under the effect of deciding torque wrench 4, the tensile length of spring 10 is different with normal conditions this moment, the tensile force on the spring 10 is also different, can judge that it is nonconforming product. The lower part of the base 8 in the embodiment is provided with a hollow frame 7, and a lifting space is reserved for the lower end of the lifting column.

Claims

1. A thread detection device for an internally threaded bushing, characterized by: comprises a sliding column (11) arranged along the vertical direction, a sleeve (12) capable of sliding up and down along the sliding column (11), a top beam (1) fixed on the sleeve (12) and a base (8) fixed at the lower end of the sliding column (11); a threaded hole is formed in the sleeve (12), and a screw (13) used for fixing the sleeve (12) and the sliding column (11) is arranged in the threaded hole in a matched mode; an external thread column (2) which is fixedly connected with the upper end of the internal thread sleeve to be detected is arranged on the lower edge of the top beam (1) along the vertical direction; a liftable fixed torque wrench (4) is arranged on the base (8), an output end of the fixed torque wrench (4) is vertically and upwards arranged and fixed with an external thread frustum (3) which is matched and installed with the lower end of an internal thread sleeve to be detected, the external thread frustum (3) is coaxial with the external thread column (2), and the small end of the external thread frustum is upwards arranged, the other end of the fixed torque wrench (4) is fixedly connected with the upper end of a vertically arranged lifting shaft (9), the lower end of the lifting shaft (9) can be slidably arranged in a shaft hole formed in the base (8), and a spline mechanism for preventing the lifting shaft (9) from rotating is arranged between the lifting shaft (9) and the shaft hole; the spring (10) is sleeved outside the lifting shaft (9), one end of the spring (10) is fixedly connected with the base (8), and the other end of the spring is fixedly connected with a tension sensor (5) which is arranged at the lower end of the fixed torque wrench (4) and used for measuring the tension of the spring (10).

2. A thread sensing device for an internally threaded socket as claimed in claim 1, wherein: a hollow frame (7) is arranged below the base (8).

3. A thread sensing device for an internally threaded socket as claimed in claim 1, wherein: and length scale marks are arranged on the sliding column (11) along the length direction of the sliding column (11).

4. A thread sensing device for an internally threaded socket as claimed in claim 1, wherein: the cross sections of the sliding column (11) and the sleeve (12) are square.

5. A thread sensing device for an internally threaded socket as claimed in claim 1, wherein: the tension sensor (5) comprises a display screen (6) for displaying the tension value.