Compression resistance testing equipment for internal thread pipe

Abstract

The utility model discloses a compression test equipment of internal thread pipe, including support down-pressing mechanism and pressure detection mechanism, the pressure detection mechanism is provided on the support down-pressing mechanism, the support down-pressing mechanism includes the support flat plate, the top of the support flat plate is fixedly equipped with the support frame, and the support frame is fixed on the support flat plate. An electric hydraulic telescopic rod is fixedly installed in the middle of the bottom end of the supporting frame, a supporting disc is fixedly installed in the middle of the top end of the supporting flat plate, a protective outer frame is placed on the portion, located on the outer side of the supporting disc, of the top end of the supporting flat plate, and the pressure detection mechanism comprises a fixing disc and an extrusion disc. Precise pressure applying is achieved through control of the electric hydraulic telescopic rod and the PLC, it is guaranteed that the threaded pipe does not deviate in the testing process in combination with bidirectional limiting of the positioning groove and the anti-skid groove, the pressure sensor captures a sudden pressure drop signal at the collapse moment in real time, a pressure curve is dynamically drawn through the displayer, and the compression resistance peak value is accurately locked.

Description

Technical Field

[0001] This utility model relates to the field of threaded pipe testing, specifically a pressure testing device for internally threaded pipes. Background Technology

[0002] After production, threaded pipes undergo testing before being put into use. The testing equipment is therefore quite important, as the test results directly affect the actual performance of the threaded pipes. Traditional testing relies on manual jacks for pressure testing, which cannot accurately measure the compressive strength of the threaded pipes. Moreover, during pressure testing, the threaded pipes may experience debris splashing or even be squeezed out. Therefore, there is an urgent need for a compressive strength testing device for internally threaded pipes to solve these problems. Utility Model Content

[0003] The purpose of this invention is to provide a pressure testing device for internally threaded pipes to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pressure testing device for internally threaded pipes, comprising a support pressing mechanism and a pressure detection mechanism. The pressure detection mechanism is disposed on the support pressing mechanism. The support pressing mechanism includes a support plate, a support frame fixedly installed at the top of the support plate, an electro-hydraulic telescopic rod fixedly installed at the bottom center of the support frame, a support disc fixedly installed at the top center of the support plate, and a protective outer frame placed at the top of the support plate outside the support disc. The pressure detection mechanism includes a fixed disc and a pressing disc, the fixed disc being movably connected to the top of the pressing disc, and a pressure sensor fixedly installed at the top center of the pressing disc.

[0005] Preferably, a fixing plate is fixedly installed at the front center of the support frame, and a PLC controller and a display are fixedly installed at the front end of the fixing plate. The PLC controller is wiredly connected to the electro-hydraulic telescopic rod, the pressure sensor and the display.

[0006] Preferably, a positioning groove is provided at the center of the top of the support disc.

[0007] Preferably, a shielding ring is fixedly connected to the top of the protective frame, and the top of the shielding ring is inclined in an arc shape towards the center.

[0008] Preferably, the top outer side of the fixed plate has a limit sliding hole evenly extending through it, the top of the fixed plate has two fixing holes symmetrically extending through it, and the bottom of the fixed plate has two clearance grooves symmetrically extending through it at the bottom of the fixing holes.

[0009] Preferably, a limiting slide rod is uniformly fixedly installed on the outer side of the top of the extrusion disc, a baffle is fixedly connected to the top of the limiting slide rod, the limiting slide rod is slidably connected to the inner side of the limiting slide hole, the baffle is located at the top of the fixed disc, and the top of the pressure sensor is in contact with the middle of the bottom end of the fixed disc.

[0010] Preferably, an anti-slip groove is provided at the bottom center of the extrusion disc, and the positioning groove and the anti-slip groove are matched in position.

[0011] Preferably, the fixing plate is fixedly installed on the telescopic end of the electro-hydraulic telescopic rod by bolts passing through the fixing holes, and the end of the bolt is located inside the clearance groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention achieves precise pressure application through the control of an electric hydraulic telescopic rod and a PLC controller. Combined with the bidirectional limiting of the positioning groove and anti-slip groove, it ensures that the threaded pipe does not deviate during the test. The pressure sensor captures the pressure drop signal at the moment of collapse in real time and dynamically plots the pressure curve on the display to accurately lock the pressure peak. The protective frame and the arc-shaped shielding ring form a splash barrier, limiting the range of debris splashing to inside the protective frame, thus improving safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present utility model;

[0015] Figure 2 This is a schematic diagram of the support and pressing mechanism in this utility model;

[0016] Figure 3 This is a schematic diagram of the pressure detection mechanism in this utility model;

[0017] Figure 4 This is a schematic diagram of the bottom structure of the pressure detection mechanism in this utility model.

[0018] In the diagram: 1-Support pressing mechanism; 2-Pressure detection mechanism; 3-Support plate; 4-Support frame; 5-Electro-hydraulic telescopic rod; 6-Fixing plate; 7-PLC controller; 8-Display; 9-Support disc; 10-Positioning groove; 11-Protective outer frame; 12-Shielding ring; 13-Fixing disc; 14-Extrusion disc; 15-Limiting sliding hole; 16-Fixing hole; 17-Allowing groove; 18-Limiting sliding rod; 19-Baffle; 20-Pressure sensor; 21-Anti-slip groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides an embodiment of a pressure testing device for internally threaded pipes, comprising a support pressing mechanism 1 and a pressure detection mechanism 2. The pressure detection mechanism 2 is mounted on the support pressing mechanism 1. The support pressing mechanism 1 includes a support plate 3, a support frame 4 fixedly mounted on the top of the support plate 3, an electric hydraulic telescopic rod 5 fixedly mounted on the middle of the bottom end of the support frame 4, a support disc 9 fixedly mounted on the middle of the top of the support plate 3, a protective outer frame 11 placed on the outside of the support disc 9 at the top of the support plate 3, a fixing plate 6 fixedly mounted on the middle of the front end of the support frame 4, and a PLC controller 7 and a display 8 fixedly mounted on the front end of the fixing plate 6. The PLC controller 7 is wiredly connected to the pressure sensor 20 and the display 8 respectively through its internal data control module. The pressure sensor 20 transmits the detected pressure signal to the PLC controller 7. The processing module, PLC controller 7, converts signals into data and sends them to display 8 for display. It also displays the pressure data curve on display 8, making it easy for users to observe pressure changes. PLC controller 7 is wired to the electric hydraulic telescopic rod 5 through the control module. PLC controller 7 controls the extension and retraction of electric hydraulic telescopic rod 5. The top center of the support disc 9 is provided with a positioning groove 10. The positioning groove 10 positions and limits the threaded tube to prevent the threaded tube from detaching from the top of the support disc 9. The top of the protective frame 11 is fixedly connected to a shielding ring 12. The top of the shielding ring 12 is inclined in an arc shape towards the center. The design of the protective frame 11 and shielding ring 12 can protect the user and prevent debris from impacting the user and causing injury. The inner arc design of the shielding ring 12 can cause the flying debris to bounce into the interior of the protective frame 11, thereby reducing the danger of debris splashing.

[0021] The pressure detection mechanism 2 includes a fixed plate 13 and a pressing plate 14. The fixed plate 13 is movably connected to the top of the pressing plate 14. A pressure sensor 20 is fixedly installed in the middle of the top of the pressing plate 14. Limiting sliding holes 15 are evenly and uniformly opened through the outer side of the top of the fixed plate 13. Two fixing holes 16 are symmetrically opened through the top of the fixed plate 13. Two clearance grooves 17 are symmetrically opened at the bottom of the fixed plate 13 at the bottom of the fixing holes 16. Limiting sliding rods 18 are evenly and uniformly fixedly installed on the outer side of the top of the pressing plate 14. A baffle is fixedly connected to the top of the limiting sliding rod 18. 19. The limiting slide rod 18 is slidably connected to the inside of the limiting slide hole 15. The baffle 19 is located at the top of the fixed plate 13. The top of the pressure sensor 20 is in contact with the middle of the bottom of the fixed plate 13. When the bottom of the extrusion plate 14 contacts the threaded tube, it stops moving. The fixed plate 13 continues to slide downward through the limiting slide rod 18. When the bottom of the fixed plate 13 contacts the pressure sensor 20, the pressure sensor 20 detects the pressure. The electric hydraulic telescopic rod 5 extends and continuously pushes the fixed plate 13 downward to extrude the threaded tube. The pressure detected by the pressure sensor 20 changes in real time.

[0022] An anti-slip groove 21 is provided at the bottom center of the extrusion disc 14. The positioning groove 10 and the anti-slip groove 21 are matched. The anti-slip groove 21 and the positioning groove 10 limit the upper and lower positions of the threaded tube, making the threaded tube more stable during the test, thereby preventing the threaded tube from being squeezed out and popped out of the top of the support disc 9.

[0023] The fixed plate 13 is fixedly installed on the telescopic end of the electric hydraulic telescopic rod 5 by bolts passing through the fixed hole 16, and the end of the bolt is located inside the clearance groove 17 to avoid the bolt affecting the contact between the bottom of the fixed plate 13 and the top of the pressure sensor 20.

[0024] Working Principle: During use, firstly, select the corresponding support disc 9 and extrusion disc 14 according to the outer diameter of the threaded tube, so that the outer side of the threaded tube contacts the inner side of the positioning groove 10 and the anti-slip groove 21. Then, place the threaded tube inside the positioning groove 10, and use the curvature of the positioning groove 10 to position the threaded tube at the center of the top of the support disc 9. Then, activate the extension of the electric hydraulic telescopic rod 5. The extension end of the electric hydraulic telescopic rod 5 pushes the fixed disc 13 and extrusion disc 14 downward. When the extrusion disc 14 contacts the top of the threaded tube, it stops moving. At this time, the fixed disc 13 continues to move downward until the bottom of the fixed disc 13 contacts the top of the pressure sensor 20. When the pressure sensor 20 contacts the bottom of the fixed disc 13, it detects the pressure. At the same time, the pressure sensor 20 transmits the pressure signal to the data processing module inside the PLC controller 7. The data processing module converts the signal into data and sends it to the display 8 for display. As shown, the electric hydraulic telescopic rod 5 continues to extend, driving the fixed plate 13 to squeeze the pressure sensor 20. The pressure sensor 20 transmits pressure to the squeezing plate 14, which squeezes the threaded tube located below. The top of the threaded tube is located inside the anti-slip groove 21, thus limiting the threaded tube and preventing it from detaching from the bottom of the squeezing plate 14. As the electric hydraulic telescopic rod 5 continues to extend, the pressure sensor 20 detects that the threaded tube cannot extend due to its compressive strength. The pressure increases until the threaded tube can no longer withstand the pressure and collapses. At this point, the detection ends. At the instant the threaded tube collapses, the pressure sensor 20 detects a sudden drop in pressure. Therefore, the first peak of the pressure data curve displayed on the display 8 is the highest compressive strength of the threaded tube. When the threaded tube is squeezed and breaks, the debris that jumps out is blocked by the protective frame 11 and the shielding ring 12, preventing injury to the user.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compression test apparatus for internally threaded pipes, comprising a support lower compression mechanism (1) and a pressure detection mechanism (2), characterized in that: The pressure detection mechanism (2) is arranged on the support and pressing mechanism (1), the support and pressing mechanism (1) includes a support flat plate (3), the top end of the support flat plate (3) is fixedly installed with a support frame (4), the bottom end of the middle of the support frame (4) is fixedly installed with an electric hydraulic telescopic rod (5), the top end of the middle of the support flat plate (3) is fixedly installed with a support disc (9), the top end of the support flat plate (3) is placed with a protective outer frame (11) outside the support disc (9), the pressure detection mechanism (2) includes a fixed disc (13) and an extrusion disc (14), the fixed disc (13) is movably connected to the top end of the extrusion disc (14), and the top end of the middle of the extrusion disc (14) is fixedly installed with a pressure sensor (20).

2. A collapse testing apparatus for a pipe having an internal thread as defined in claim 1, wherein: The front end of the middle of the support frame (4) is fixedly installed with a fixed plate (6), the front end of the fixed plate (6) is fixedly installed with a PLC controller (7) and a display (8) respectively, and the PLC controller (7) is connected with the electric hydraulic telescopic rod (5), the pressure sensor (20) and the display (8) in a wired electrical manner.

3. A collapse testing apparatus for a female threaded pipe as defined in claim 1 wherein: The top end of the middle of the support disc (9) is provided with a positioning groove (10).

4. A collapse testing apparatus for a female threaded pipe as defined in claim 1 wherein: The top end of the protective outer frame (11) is fixedly connected with a shielding ring (12), and the top end of the shielding ring (12) is arc-shaped and inclined to the center.

5. A compression testing apparatus for a threaded end of a pipe as defined in claim 1, wherein: The top end of the fixed disc (13) is uniformly provided with a limiting sliding hole (15) penetratingly arranged outside, the top end of the fixed disc (13) is symmetrically provided with two fixed holes (16) penetratingly arranged, and the bottom end of the fixed disc (13) is symmetrically provided with two avoiding grooves (17) at the position of the bottom end of the fixed hole (16).

6. A compression testing apparatus for a female threaded pipe as defined in claim 5 wherein: The top end of the limiting sliding rod (18) is fixedly connected with a baffle (19), the limiting sliding rod (18) is slidably connected to the inner side of the limiting sliding hole (15), the baffle (19) is located at the top end of the fixed disc (13), and the top end of the pressure sensor (20) and the middle of the bottom end of the fixed disc (13) are connected.

7. A collapse testing apparatus for a female threaded pipe as defined in claim 3 wherein: The bottom end of the middle of the extrusion disc (14) is provided with an anti-skid groove (21), and the positions of the positioning groove (10) and the anti-skid groove (21) are matched.

8. A collapse testing apparatus for a female threaded pipe as defined in claim 5 wherein: The fixed disc (13) is fixedly installed on the telescopic end of the electric hydraulic telescopic rod (5) through the fixed hole (16), and the end of the bolt is located in the avoiding groove (17).

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