Strength detection device for seamless stainless steel pipe

Abstract

The invention relates to a strength detection device for a seamless stainless steel pipe, which is applied to the technical field of steel pipe test equipment, and comprises a base, an end fixing module, a steel pipe, a pressure applying module, a pressure test plug, a liquid injection pipe, a movable pile, a mounting pipe and a wrapping sleeve. Then testing liquid with specified pressure is injected into a liquid injection pipe, a pressure applying module applies deformation pressure to the steel pipe, the steel pipe is bent and deformed to cause pressure change of the internal testing liquid, the middle of the steel pipe is wrapped by a wrapping sleeve, and the wrapping sleeve can synchronously bend and deform along with the steel pipe; and the wrapping sleeve can limit the test liquid leaked due to bending fracture of the steel pipe, so that the test liquid is effectively prevented from leaking, and in the subsequent process of cutting the steel pipe into two sections to be taken out quickly and cutting the steel pipe, the test liquid remained in the wrapping sleeve is used for cutting and cooling, so that the wrapping sleeve is effectively prevented from being damaged.

Description

Technical Field

[0001] A strength detection device involved in the present invention, in particular, a strength detection device for seamless stainless steel pipes applied to the technical field of steel pipe testing equipment. Background Art

[0002] Seamless steel pipes are made by piercing a whole round steel, and steel pipes without welds on the surface are called seamless steel pipes. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, pipe jacking, etc. Seamless steel pipes need to be subjected to strength tests to confirm their pressure-bearing capacity and thus ensure safety performance in actual applications.

[0003] Chinese Patent CN202410073293.X specification discloses "A pressure testing device for manufacturing seamless steel pipes". By inserting the extending column into the seamless steel pipe and occupying the space inside the seamless steel pipe, the amount of pressure medium filled is reduced when reducing the pressure medium, thus reducing the time for the pressure medium injected into the seamless steel pipe to reach the specified pressure value. Furthermore, the time for filling and discharging the pressure medium is reduced, shortening the pressure testing time. Chinese Patent CN202323415768.9 specification discloses "A pressure resistance detection device for seamless steel pipes". When this pressure resistance detection device for seamless steel pipes conducts a pressure resistance test on seamless steel pipes, it detects the surface condition of the seamless steel pipe through the shape detection mechanism. When deformation occurs on the surface of the steel pipe, a signal is sent in time to stop the pressure resistance detection, improving the practicality during the use of the device.

[0004] During the testing process of steel pipes, relevant testing media need to be filled inside the steel pipes, generally air and water, and most use liquid media. The internal space of the steel pipe is filled with a medium at a specified pressure, and then the pressure change of the medium inside the steel pipe is detected to judge the deformation condition of the steel pipe. However, the steel pipe is prone to breakage during the testing deformation process, so the testing medium pre-filled inside the steel pipe is likely to leak, thus affecting the testing environment. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that the steel pipe is prone to breakage during the testing deformation process, so the testing medium pre-filled inside the steel pipe is likely to leak, thus affecting the testing environment.

[0006] To solve the above problems, the present invention provides a seamless stainless steel pipe strength detection device, including a base. Both ends of the base are slidably connected with end fixing modules. A steel pipe is clamped and fixed between the two end fixing modules. One end in the middle of the base is fixedly connected with a pressure applying module. The output end of the pressure applying module corresponds horizontally to the middle of the steel pipe. The middle of the end fixing module is fixedly connected with a pressure test plug. The pressure test plug is inserted and corresponds to the port of the steel pipe. And a liquid injection pipe is fixedly connected to the middle of the pressure test plug;

[0007] The other end in the middle of the base is slidably connected with a movable pile. The top of the movable pile is fixedly connected with an installation pipe. One end of the installation pipe is fixedly connected with a wrapping sleeve. The wrapping sleeve is sleeved on the middle of the steel pipe. Sealing rings are fixedly connected to both ends of the wrapping sleeve corresponding to the surface of the steel pipe. And a liquid outlet pipe is fixedly connected to the bottom of the wrapping sleeve.

[0008] In the above seamless stainless steel pipe strength detection device, a test liquid with a certain pressure is injected into the steel pipe. During the process of the pressure applying module pressing and bending the steel pipe for testing, the pressure test plug detects the change of the internal hydraulic pressure of the steel pipe, so as to judge whether the steel pipe is deformed. And the middle of the steel pipe is wrapped by the wrapping sleeve to avoid the leakage of the test liquid after the steel pipe is deformed and broken.

[0009] As a further improvement of the present application, a pressure applying pillow block is fixedly connected to one end of the middle of the wrapping sleeve facing the pressure applying module. The pressure applying pillow block is inserted and corresponds to the output end of the pressure applying module. The wrapping sleeve is made of wear-resistant rubber material. The output end of the pressure applying module applies pressure to the steel pipe by using the pressure applying pillow block, effectively avoiding the direct pressure application of the pressure applying module to the wrapping sleeve, thereby effectively protecting the wrapping sleeve.

[0010] As a further improvement of the present application, the installation pipe is internally communicated with the wrapping sleeve. And a wire saw module is movably sleeved inside the installation pipe. The saw coil of the wire saw module is sleeved on the middle of the steel pipe. A saw wire groove is opened in the middle of the pressure applying pillow block. The saw coil of the wire saw module corresponds to the saw wire groove. The saw wire groove provides a storage space for the saw coil of the wire saw module before testing. After the steel pipe is tested and bent, the middle of the bent steel pipe is cut by the wire saw module. The leaked test liquid cools the wire saw module and provides protection for the inner wall of the wrapping sleeve, so that the steel pipe is cut into two sections at the tail, thus facilitating the separation of the steel pipe from the pressure test plug.

[0011] As a further improvement of the present application, an auxiliary liquid pipe is fixedly connected to the top of the wrapping sleeve. The top of the pressure applying pillow block corresponds to the water outlet end of the auxiliary liquid pipe. When the steel pipe is bent but does not break and leak the test liquid, the test liquid for cooling is directly sent into the wrapping sleeve by using the auxiliary liquid pipe to provide a cooling effect for the initial cutting of the steel pipe, effectively avoiding the influence of the cutting debris on the inner wall of the wrapping sleeve.

[0012] As another improvement of the present application, a wheel saw module can also be movably sleeved and installed inside the installation pipe. The saw wheel of the wheel saw module is horizontally corresponding to the middle part of the steel pipe. The water outlet end of the auxiliary liquid pipe is rotatably connected with a rotating head, and the rotating head has the ability to rotate 180 degrees. Instead of using the wheel saw module to cut the steel pipe, the input direction of the auxiliary liquid pipe is changed through the rotating head, which is convenient for the test liquid to provide a cooling effect for the wheel saw module.

[0013] As a supplement to another improvement of the present application, support brackets are fixedly connected to both ends of the top of the pressure-applying pillow block. The top of the corresponding wrapping sleeve of the support brackets is curved in an arc shape. By providing support to the top of the wrapping sleeve through the support brackets, it effectively avoids the situation where the wrapping sleeve sags when a large amount of test liquid is stored in the wrapping sleeve, thereby effectively preventing the sagging wrapping sleeve from contacting the cut notch and the wheel saw module in the working state, and further effectively improving the protection ability of the wrapping sleeve.

[0014] As a supplement to another improvement of the present application, a rib support is fixedly connected between the top of the support bracket and the top of the sealing ring. The rib support is embedded in the inner surface of the wrapping sleeve, and the support effect of the support bracket is further extended by using the rib support, further effectively improving the protection ability of the wrapping sleeve.

[0015] As another improvement of the present application, the connecting part of the rib support and the support bracket is provided with a V-shaped bend towards the pressure-applying pillow block, and both the rib support and the support bracket are made of spring steel material. Through the V-shaped bend setting of the rib support, it is convenient for the wrapping sleeve to synchronize with the bending state of the steel pipe.

[0016] In summary, the present invention fixes the two ends of the steel pipe through the end fixing module, inserts the pressure test plug into the two ends of the steel pipe to block them, then injects the test liquid with a specified pressure into the injection pipe, the pressure-applying module applies a deforming pressure to the steel pipe, the steel pipe bends and deforms, causing a change in the pressure of the internal test liquid. The middle part of the steel pipe is wrapped by the wrapping sleeve, and the wrapping sleeve can bend and deform synchronously with the steel pipe, and the wrapping sleeve can limit the test liquid leaked due to the bending and fracture of the steel pipe, effectively avoiding the leakage of the test liquid. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structure diagram of the first embodiment of the present application;

[0018] Figure 2 It is a three-dimensional structure diagram of the first embodiment of the present application in the state where the steel pipe is not fixed;

[0019] Figure 3 It is a side sectional view of the first embodiment of the present application;

[0020] Figure 4 It is a demonstration diagram of the steel pipe bending state of the first embodiment of the present application;

[0021] Figure 5 This is the three-dimensional structure diagram of the wrapping sleeve in the first implementation mode of this application;

[0022] Figure 6 This is the side sectional view of the wire saw module in the second implementation mode of this application;

[0023] Figure 7 This is the sectional three-dimensional structure diagram of the wrapping sleeve in the second implementation mode of this application;

[0024] Figure 8 This is the bottom-up three-dimensional structure diagram of the pressure-applying pillow block in the second implementation mode of this application;

[0025] Figure 9 This is the side sectional view of the circular saw module in the third implementation mode of this application;

[0026] Figure 10 This is the side sectional view of the wrapping sleeve in the third implementation mode of this application.

[0027] Explanation of the reference numerals in the figure:

[0028] 1. Base; 101. End-fixing module; 102. Steel pipe; 103. Pressure-applying module; 104. Pressure test plug; 105. Liquid injection pipe; 2. Movable pile; 201. Installation pipe; 202. Wrapping sleeve; 203. Sealing ring; 204. Liquid outlet pipe; 205. Wire saw module; 206. Circular saw module; 3. Pressure-applying pillow block; 301. Sawing groove; 302. Auxiliary liquid pipe; 303. Rotating head; 304. Supporting bracket; 305. Rib brace. Specific implementation mode

[0029] The following will make a detailed description of the three implementation modes of this application with reference to the accompanying drawings.

[0030] The first implementation mode:

[0031] Figures 1 to 5A seamless stainless steel pipe strength detection device is shown, which includes a base 1. Both ends of the base 1 are slidably connected with end fixing modules 101. A steel pipe 102 is clamped and fixed between the two end fixing modules 101. One end in the middle of the base 1 is fixedly connected with a pressure applying module 103. The output end of the pressure applying module 103 is horizontally corresponding to the middle of the steel pipe 102. A pressure test plug 104 is fixedly connected to the middle of the end fixing module 101. The pressure test plug 104 is inserted and corresponding to the port of the steel pipe 102. And a liquid injection pipe 105 is fixedly connected to the middle of the pressure test plug 104. The other end in the middle of the base 1 is slidably connected with a movable pile 2. The top of the movable pile 2 is fixedly connected with an installation pipe 201. One end of the installation pipe 201 is fixedly connected with a wrapping sleeve 202. The wrapping sleeve 202 is sleeved on the middle of the steel pipe 102. Sealing rings 203 are fixedly connected to both ends of the wrapping sleeve 202 corresponding to the surface of the steel pipe 102. And a liquid outlet pipe 204 is fixedly connected to the bottom of the wrapping sleeve 202. One end of the middle of the wrapping sleeve 202 facing the pressure applying module 103 is fixedly connected with a pressure applying pillow block 3. The pressure applying pillow block 3 is inserted and corresponding to the output end of the pressure applying module 103. The wrapping sleeve 202 is made of wear-resistant rubber material. The output end of the pressure applying module 103 applies pressure to the steel pipe 102 by means of the pressure applying pillow block 3, effectively avoiding the direct pressure of the pressure applying module 103 on the wrapping sleeve 202, thereby effectively protecting the wrapping sleeve 202;

[0032] When performing the strength test of the steel pipe 102, the steel pipe 102 to be tested is clamped and fixed by the end fixing module 101. The pressure test plug 104 plugs and seals both ends of the steel pipe 102, making the inside of the steel pipe 102 airtight. Test liquid is injected into the steel pipe 102 through the liquid injection pipe 105. The pressure test plug 104 includes a pressure sensor for hydraulic detection. When the steel pipe 102 is deformed under the pressure of the pressure applying module 103, the hydraulic pressure inside the steel pipe 102 changes accordingly. Thus, the strength test result of the steel pipe 102 is obtained through the change of the hydraulic pressure. When the steel pipe 102 is deformed and fractured, the wrapping sleeve 202 wraps the middle part of the fractured steel pipe 102, effectively avoiding the leakage of the test liquid, thereby protecting the test environment.

[0033] The second implementation method:

[0034] Compared with the first implementation method, a wire saw module 205 is mainly added. The specific added structure is as follows, and the rest of the structure is the same as that of the first implementation method.

[0035] Figures 6 to 8It is shown that the installation pipe 201 is internally connected to the inside of the wrapping sleeve 202, and a wire saw module 205 is movably sleeved inside the installation pipe 201. The saw coil of the wire saw module 205 is sleeved on the middle part of the steel pipe 102. The wire saw module 205 is composed of a wire saw and a telescopic device. The telescopic device drives the wire saw to telescopically move inside the installation pipe 201. The cutting process mainly drives the wire saw to contract into the installation pipe 201. The wire saw cuts in a repeated movement manner. A saw wire groove 301 is provided in the middle of the pressure application pillow block 3. The saw coil of the wire saw module 205 corresponds to the saw wire groove 301. The saw wire groove 301 provides a storage space for the saw coil of the wire saw module 205 before testing. After the steel pipe 102 is tested and bent, the middle part of the bent steel pipe 102 is cut by the wire saw module 205. The leaked test liquid cools the wire saw module 205 and protects the inner wall of the wrapping sleeve 202, so that the steel pipe 102 is cut into two sections at the tail, which is convenient for the steel pipe 102 to be separated from the pressure test plug 104. A auxiliary liquid pipe 302 is fixedly connected to the top of the wrapping sleeve 202. The top of the pressure application pillow block 3 corresponds to the water outlet end of the auxiliary liquid pipe 302. When the steel pipe 102 is bent but does not break and leak the test liquid, the auxiliary liquid pipe 302 is used to directly send the test liquid for cooling into the wrapping sleeve 202, providing a cooling effect for the initial cutting of the steel pipe 102 and effectively avoiding the influence of the inner wall of the wrapping sleeve 202 by cutting debris;

[0036] After the steel pipe 102 is bent due to testing and presents a V-shaped state, at this time, it is inconvenient to remove the bent and deformed steel pipe 102 from the end fixing module 101, and it is difficult to directly pull out the pressure test plug 104 from the steel pipe 102. At this time, the wire saw module 205 is used to perform wire saw cutting on the middle part of the bent and deformed steel pipe 102, so as to cut the steel pipe 102 into two sections. The space required for wire saw cutting is relatively small. The saw wire groove 301 on the pressure application pillow block 3 facilitates the saw coil to pass through, which is convenient for pulling out the two sections of the steel pipe 102 from the pressure test plug 104 respectively. At the same time, during the cutting process of the steel pipe 102, the leaked test liquid can be used for cutting cooling. When the steel pipe 102 is bent but does not break and leak the test liquid, the auxiliary liquid pipe 302 is used to directly send the test liquid for cooling into the wrapping sleeve 202. Subsequently, when a notch is cut in the steel pipe 102, the test liquid inside the steel pipe 102 continues to perform cutting cooling, thereby avoiding the influence of the high temperature and debris generated by cutting on the wrapping sleeve 202 and effectively improving the service life of the wrapping sleeve 202.

[0037] The third implementation method:

[0038] Compared with the second implementation method, the wire saw module 205 is changed to a wheel saw module 206. The specific new structure is as follows, and the rest of the structure is the same as that of the second implementation method.

[0039] Figures 7 to 10It is shown that a wheel saw module 206 can also be movably sleeved and installed inside the installation pipe 201. The saw wheel of the wheel saw module 206 is horizontally corresponding to the middle part of the steel pipe 102. Compared with the wire saw module 205 in the second embodiment, the wheel saw module 206 is also composed of a wheel saw and a telescopic device. The telescopic device drives the wheel saw to telescopically move inside the installation pipe 201. The cutting process mainly involves pushing the wheel saw out of the installation pipe 201. The wheel saw uses a high-speed saw wheel for cutting. The saw wheel requires a larger working space compared to the wire saw. The water outlet end of the auxiliary liquid pipe 302 is rotatably connected to a rotating head 303. The rotating head 303 has a 180-degree rotation ability. When using the wheel saw module 206 to cut the steel pipe 102, the input orientation of the auxiliary liquid pipe 302 is changed through the rotating head 303, which is convenient for the test liquid to provide a cooling effect for the wheel saw module 206. Both ends of the top of the pressure-applying pillow block 3 are fixedly connected with support brackets 304. The top of the corresponding wrapping sleeve 202 of the support brackets 304 is curved in an arc shape. The top of the wrapping sleeve 202 is supported by the support brackets 304, effectively preventing the wrapping sleeve 202 from sagging when a large amount of test liquid is stored inside the wrapping sleeve 202, thereby effectively preventing the sagging wrapping sleeve 202 from contacting the cutting notch and the working wheel saw module 206, and further effectively improving the protection ability of the wrapping sleeve 202. A rib support 305 is fixedly connected between the top of the support bracket 304 and the top of the sealing ring 203. The rib support 305 is embedded in the inner surface of the wrapping sleeve 202. The support effect of the support bracket 304 is further extended by using the rib support 305, and the protection ability of the wrapping sleeve 202 is further effectively improved. The connecting part of the rib support 305 and the support bracket 304 is provided with a V-shaped bend towards the pressure-applying pillow block 3. Both the rib support 305 and the support bracket 304 are made of spring steel material. Through the V-shaped bend of the rib support 305, it is convenient for the wrapping sleeve 202 to synchronize with the bending state of the steel pipe 102;

[0040] By using the wheel saw module 206 to cut the steel pipe 102, it is faster than the wire saw cutting method of the wire saw module 205. However, the saw wheel of the wheel saw module 206 requires a larger cutting space, and the high-speed rotating saw wheel is more likely to damage the wrapping sleeve 202. The top of the wrapping sleeve 202 is supported by the support bracket 304, and then the support effect of the support bracket 304 is further extended by using the rib support 305, effectively preventing the wrapping sleeve 202 from sagging, realizing that the wrapping sleeve 202 is far away from the cutting position of the steel pipe 102, thereby effectively improving the protection ability of the wrapping sleeve 202. Through the V-shaped bend of the rib support 305, during the bending deformation of the steel pipe 102, the V-shaped bend of the rib support 305 is more likely to follow the bending of the steel pipe 102, thus facilitating the wrapping sleeve 202 to synchronize with the bending state of the steel pipe 102.

[0041] Combined with the current actual requirements, the above-described embodiments adopted in this application, the scope of protection is not limited thereto. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A strength testing device for seamless stainless steel pipes, characterized in that: The base (1) comprises a base, both ends of which are slidably connected to end fixing modules (101), a steel pipe (102) is clamped and fixed between the two end fixing modules (101), a pressure applying module (103) is fixedly connected to one end of the middle of the base (1), an output end of the pressure applying module (103) corresponds horizontally to the middle of the steel pipe (102), a pressure test plug (104) is fixedly connected to the middle of the end fixing module (101), the pressure test plug (104) corresponds to the port of the steel pipe (102), and a liquid injection pipe (105) is fixedly connected to the middle of the pressure test plug (104); The other end of the middle of the base (1) is slidably connected to a movable pile (2), the top of the movable pile (2) is fixedly connected to a mounting tube (201), one end of the mounting tube (201) is fixedly connected to a wrapping sleeve (202), the wrapping sleeve (202) is sleeved with the middle of the steel pipe (102), the two ends of the wrapping sleeve (202) are fixedly connected to the surface of the steel pipe (102), and the bottom of the wrapping sleeve (202) is fixedly connected to a liquid outlet pipe (204).

2. A strength detection device for seamless stainless steel pipe according to claim 1, characterized in that: A pressure pillow block (3) is fixedly connected to one end of the middle portion of the wrapping sleeve (202) facing the pressure module (103), and the pressure pillow block (3) is plugged into and corresponds to the output end of the pressure module (103). The wrapping sleeve (202) is made of a wear-resistant rubber material.

3. A strength detection device for seamless stainless steel pipe according to claim 2, characterized in that: The mounting tube (201) is connected to the interior of the wrapping sleeve (202), and a wire saw module (205) is movably sleeved inside the mounting tube (201), a saw coil of the wire saw module (205) is sleeved with the middle part of the steel tube (102), a saw wire groove (301) is provided in the middle part of the pressure pillow block (3), and the saw coil of the wire saw module (205) corresponds to the saw wire groove (301).

4. A strength detection device for seamless stainless steel pipe according to claim 3, characterized in that: The top of the wrapping sleeve (202) is fixedly connected to an auxiliary liquid pipe (302), and the top of the pressure pillow block (3) corresponds to the water outlet end of the auxiliary liquid pipe (302).

5. A strength detection device for seamless stainless steel pipe according to claim 4, characterized in that: The interior of the installation tube (201) can also be installed by movably sleeve-jointing a wheel saw module (206), wherein the saw wheel of the wheel saw module (206) corresponds horizontally to the middle of the steel tube (102), and the water outlet end of the auxiliary liquid tube (302) is rotatably connected to a rotating head (303), and the rotating head (303) has a 180-degree rotating capability.

6. A strength detection device for seamless stainless steel pipe according to claim 2, characterized in that: Both ends of the top of the pressure pillow block (3) are fixedly connected to supporting brackets (304), and the supporting brackets (304) are arranged in an arc shape corresponding to the top of the wrapping sleeve (202).

7. A strength detection device for seamless stainless steel pipe according to claim 6, characterized in that: A rib support rib (305) is fixedly connected between the top of the supporting bracket (304) and the top of the sealing ring (203), and the rib support rib (305) is embedded in the inner surface of the wrapping sleeve (202).

8. A strength detection device for seamless stainless steel pipe according to claim 7, characterized in that: The connection portion between the rib support rib (305) and the supporting bracket (304) is provided with a V-shaped bending arrangement in the direction of the pressure pillow block (3), and the rib support rib (305) and the supporting bracket (304) are both made of spring steel material.

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