Rapid pressing device suitable for batch pipe fittings and testing equipment

Abstract

The utility model relates to the field of pipe fitting processing, and particularly discloses a rapid pressing device and test equipment suitable for batch pipe fittings. The rapid pressing device comprises a base, and a sealing cavity is formed in the base. The device further comprises a hydraulic driving assembly and a connecting assembly, the hydraulic driving assembly comprises a piston and a pull rod, and the piston is arranged in the sealing cavity in a sliding mode. One end of the pull rod is connected with the piston, and an inner expansion slope is arranged on the outer side of the expansion end; the connecting assembly comprises an expansion chuck and a sealing plug plate, and the expansion chuck comprises a plurality of expansion arms; one end of the expansion arm is fixedly connected with the base, and an outer expansion slope is arranged on the inner side of the other end of the expansion arm; the expansion end of the pull rod is connected with the sealing blocking plate; the device further comprises a pressing unit, the pressing unit comprises a pressing pipe, and a pressing channel is arranged in the pressing pipe. The rapid pressing device and the test equipment have the advantages of being easy to operate, high in efficiency and low in cost.

Description

Technical Field

[0001] The utility model relates to the field of pipe fitting processing, in particular to a rapid pressing device and testing equipment suitable for batch pipe fittings. Background Art

[0002] Pipe fittings are important components for fluid transportation, and sealing is one of the important performance indicators of pipe fittings, especially pressure-bearing pipe fittings. In order to ensure the reliability of fluid transportation, whether it is large-sized pipe fittings formed by welding or smaller-sized seamless pipe fittings, the sealing and pressure-bearing capacity of the pipe fittings need to be tested.

[0003] Pressure testing is a common method for testing the tightness and pressure bearing capacity of pipe fittings. Currently, most pressure testing methods leave a certain size margin in the length direction of the two ends of the pipe to be tested, and then weld process plugs at both ends of the steel pipe, pressurize the pipe through the process plugs, and cut off the process plugs according to the required length after the pressure test is completed. This pressure testing method has the advantages of low efficiency, high production cost, and large influence of human factors. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a rapid pressure-pressing device and testing equipment suitable for batch pipe fittings, which has the advantages of simple operation, high efficiency and low cost.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a rapid pressing device suitable for batch pipe fittings, comprising a base, wherein a sealing cavity is provided in the base;

[0006] It also includes a hydraulic drive assembly and a connecting assembly, wherein the hydraulic drive assembly includes a piston and a pull rod, wherein the piston is slidably arranged in the sealed cavity; the piston divides the sealed cavity into a first cavity and a second cavity, and the base is provided with a first hydraulic joint connected to the first cavity and a second hydraulic joint connected to the second cavity; one end of the pull rod is connected to the piston and moves axially synchronously, and the other end is an expansion end, and an inner expansion inclined surface is provided on the outer side of the expansion end;

[0007] The connection assembly includes a tensioning chuck and a sealing plug, wherein the tensioning chuck includes a plurality of tensioning arms arranged in a ring around the pull rod; one end of the tensioning arm is fixedly connected to the base, and the inner side of the other end is provided with an outer tensioning inclined surface, and the outer tensioning inclined surface contacts the inner tensioning inclined surface; the tensioning end of the pull rod extends out of the tensioning chuck and is connected to the sealing plug, and a sealing ring is provided on the sealing plug;

[0008] It also includes a pressing unit, which includes a pressing tube. The pressing tube runs through the base, the piston and the pull rod along the axial direction of the pull rod, and a pressing channel is arranged in the pressing tube.

[0009] When conducting a pressure test, first, one end of the pipe to be tested is sleeved on the expansion joint. At this time, the sealing plug extends into the pipe to be tested and slides and seals with the pipe to be tested. The other end of the pipe to be tested is also sealed. Then, high-pressure liquid is injected into one side of the piston through an external hydraulic source to push the piston and the pull rod to move axially. The inner expansion bevel slides relative to the outer expansion bevel and pushes the expansion arm to expand outward. The expansion chuck is in close contact with the inner wall of the pipe to be tested to achieve the clamping of the pipe to be tested. The external air pressure source introduces high-pressure gas into the pipe to be tested through the pressure channel. According to the changes in the air pressure in the pipeline to be tested, it can be judged whether the sealing and pressure bearing capacity of the pipe to be tested are qualified. After the pressure test is completed, the pressure in the sealing chamber is released, and high-pressure liquid is injected into the other side of the piston to drive the piston and the pull rod to move in the opposite direction. The pressure between the expansion arm and the pipe to be tested is reduced, and the expansion joint can be withdrawn from the pipe to be tested.

[0010] Compared with the existing pressure-testing method, the rapid pressure-testing device of the present application has the advantages of simple operation and high efficiency, and can be well adapted to the rapid pressure-testing of large quantities of pipes. In addition, when the rapid pressure-testing device of the present application is used, the pipe to be tested does not need to reserve a length margin, which reduces material waste and can effectively reduce production costs.

[0011] Preferably, a roller is provided at the bottom of the base.

[0012] Preferably, the base is also provided with a push-pull handle.

[0013] The quick pressing device can be conveniently moved as a whole, which is convenient for transfer between various workstations and has good adaptability.

[0014] Preferably, the base comprises a cylinder barrel and two cylinder covers, and the two cylinder covers are sealingly connected to the cylinder barrel and together enclose a sealed cavity.

[0015] Preferably, the piston is slidably sealed with the inner wall of the cylinder, and guide parts are respectively provided at both ends of the piston, and the guide parts pass through the corresponding end covers and are slidably sealed with the corresponding end covers; the pressure tube is axially penetrated through the guide parts.

[0016] Preferably, the expansion chuck further comprises a connecting seat and a pressure cover, the pressure cover is detachably connected to the connecting seat and jointly presses the expansion arm, and the connecting seat is connected to the base.

[0017] Preferably, one end of the pressure-testing tube away from the sealing plug is connected to a pressure detection unit, which can conveniently detect the pressure change in the pipeline to be tested.

[0018] Preferably, it further comprises an independently arranged restraining ring, wherein the inner diameter of the restraining ring is larger than the outer diameter of the expansion chuck.

[0019] During the pressure test, the restraining ring is set outside the pipe to be tested and is set correspondingly to the inside and outside of the expansion arm to play a pressure-bearing role, thereby preventing the pipe to be tested from deforming under the internal pressure.

[0020] A rapid pressure testing device suitable for batch pipe fittings comprises a hydraulic source, an air pressure source, and two sets of rapid pressure testing devices as described above; wherein the first hydraulic connector and the second hydraulic connector are respectively connected to the hydraulic source through a control valve, and the air pressure source is connected to the pressure testing pipe through the control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a rapid pressing device for batch pipe fittings according to the present embodiment;

[0022] Figure 2 This is an exploded view of a rapid pressing device for batch pipe fittings according to the present embodiment;

[0023] Figure 3 This is a cross-sectional view of a rapid pressing device for batch pipe fittings according to the present embodiment;

[0024] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0025] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0026] Figure 6 This is a schematic diagram of the structure of a rapid pressure test device applicable to batch pipe fittings in this embodiment;

[0027] Figure 7 It is a structural schematic diagram of the cooperation between the rapid pressure testing device and the pipe to be tested in the rapid pressure testing equipment suitable for batch pipes in this embodiment. Implementation

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Example

[0029] like Figure 1-Figure 3As shown, a rapid pressing device suitable for batch pipe fittings includes a base 1, and a sealed cavity is provided in the base 1. Specifically, the base 1 includes a cylinder 16 and two cylinder covers 15, and the two cylinder covers 15 are sealed and connected to the cylinder 16, and together enclose the sealed cavity. In order to improve the convenience of overall transportation, a roller 12 is provided at the bottom of the base 1, and a push-pull handle 11 is also provided on the base 1. The base 1 can be conveniently moved as a whole, and is easy to transfer between various workstations, and has good adaptability.

[0030] like Figure 3-Figure 5 As shown, it also includes a hydraulic drive assembly 5 and a connecting assembly, wherein the hydraulic drive assembly 5 includes a piston 53 and a pull rod 51, wherein the piston 53 is disposed in the sealing cavity and is slidably sealed with the inner wall of the cylinder 16. Specifically, guide portions 52 are respectively disposed at both ends of the piston 53, wherein the guide portions 52 pass through corresponding end covers and are slidably sealed with the corresponding end covers.

[0031] like Figure 3-Figure 5 As shown, the piston 53 divides the sealing cavity into a first cavity 17 and a second cavity 18 , and the base 1 is provided with a first hydraulic connector 13 communicating with the first cavity 17 , and a second hydraulic connector 14 communicating with the second cavity 18 .

[0032] like Figure 3-Figure 5 As shown, one end of the pull rod 51 is connected to the piston 53 and moves axially synchronously, and the other end is a tightening end 511, and an inner tightening inclined surface is provided on the outer side of the tightening end 511.

[0033] like Figure 3-Figure 5 As shown, the connection assembly includes a tensioning chuck 21 and a sealing plug 22, and the tensioning chuck 21 includes a plurality of tensioning arms 211 arranged in a ring around the pull rod 51. One end of the tensioning arm 211 is fixedly connected to the base 1, and the inner side of the other end is provided with an outer tensioning inclined surface, and the outer tensioning inclined surface contacts the inner tensioning inclined surface. The tensioning end 511 of the pull rod 51 extends out of the tensioning chuck 21 and is connected to the sealing plug 22, and a sealing ring is provided on the sealing plug 22. Specifically, the tensioning chuck 21 also includes a connecting seat and a pressure cover, and the pressure cover is detachably connected to the connecting seat and jointly presses the tensioning arm 211, and the connecting seat is connected to the base 1.

[0034] like Figure 3-Figure 5 As shown, it also includes a pressure unit, which includes a pressure tube 4, which is arranged along the axial direction of the pull rod 51 and penetrates the base 1, the piston 53 and the pull rod 51, and a pressure channel 41 is arranged in the pressure tube 4. Specifically, the pressure tube 4 is arranged along the axial direction and penetrates the guide part 52. The pressure tube 4 is connected to a pressure detection unit at one end away from the sealing plug 22, which can conveniently detect the pressure change in the pipeline to be tested.

[0035] like Figure 3-Figure 5 As shown, further, it also includes an independently arranged restraining ring 3, the inner diameter of which is larger than the outer diameter of the expansion chuck 21. During the pressure test, the restraining ring 3 is sleeved outside the pipe to be tested, and is arranged correspondingly to the inner and outer sides of the expansion arm 211, playing a pressure-bearing role, and can prevent the pipe to be tested from deforming under the internal pressure.

[0036] When performing a pressure test, first, one end of the pipe 6 to be tested is sleeved on the expansion joint. At this time, the sealing plug 22 extends into the pipe 6 to be tested and slides and seals with the pipe 6 to be tested. The other end of the pipe to be tested is also sealed. Then, high-pressure liquid is injected into one side of the piston 53 through the external hydraulic source 02 to push the piston 53 and the pull rod 51 to move axially. The inner expansion bevel slides relative to the outer expansion bevel and pushes the expansion arm 211 to expand outward. The expansion chuck 21 is in close contact with the inner wall of the pipe to be tested to achieve the clamping of the pipe to be tested. The external air pressure source 04 introduces high-pressure gas into the pipe to be tested through the pressure channel 41. According to the changes in the air pressure in the pipeline to be tested, it can be judged whether the sealing and pressure bearing capacity of the pipe to be tested are qualified. After the pressure test is completed, the pressure in the sealing chamber is released, and high-pressure liquid is injected into the other side of the piston 53, driving the piston 53 and the pull rod 51 to move in the opposite direction, and the pressure between the expansion arm 211 and the pipe to be tested is reduced, and the expansion joint can be withdrawn from the pipe to be tested.

[0037] Compared with the existing pressure-testing method, the rapid pressure-testing device of the present application has the advantages of simple operation and high efficiency, and can be well adapted to the rapid pressure-testing of large quantities of pipes. In addition, when the rapid pressure-testing device of the present application is used, the pipe to be tested does not need to reserve a length margin, which reduces material waste and can effectively reduce production costs.

[0038] like Figure 6 and Figure 7 As shown, a rapid pressure testing device suitable for batch pipe fittings includes a hydraulic source 02, an air pressure source 04, and two sets of rapid pressure testing devices 01 as described above; wherein the first hydraulic connector 13 and the second hydraulic connector 14 are respectively connected to the hydraulic source 02 through a control valve 03, and the air pressure source 04 is connected to the pressure testing pipe 4 through the control valve 03.

[0039] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rapid pressing device suitable for batch pipe fittings, characterized by: It comprises a base, wherein a sealing cavity is provided in the base; It also includes a hydraulic drive assembly and a connecting assembly, wherein the hydraulic drive assembly includes a piston and a pull rod, wherein the piston is slidably arranged in the sealed cavity; the piston divides the sealed cavity into a first cavity and a second cavity, and the base is provided with a first hydraulic joint connected to the first cavity and a second hydraulic joint connected to the second cavity; one end of the pull rod is connected to the piston and moves axially synchronously, and the other end is an expansion end, and an inner expansion inclined surface is provided on the outer side of the expansion end; The connection assembly includes a tensioning chuck and a sealing plug, wherein the tensioning chuck includes a plurality of tensioning arms arranged in a ring around the pull rod; one end of the tensioning arm is fixedly connected to the base, and the inner side of the other end is provided with an outer tensioning inclined surface, and the outer tensioning inclined surface contacts the inner tensioning inclined surface; the tensioning end of the pull rod extends out of the tensioning chuck and is connected to the sealing plug, and a sealing ring is provided on the sealing plug; It also includes a pressing unit, which includes a pressing tube. The pressing tube runs through the base, the piston and the pull rod along the axial direction of the pull rod, and a pressing channel is arranged in the pressing tube.

2. The rapid pressing device according to claim 1, characterized in that: The bottom of the base is provided with rollers.

3. The rapid pressing device according to claim 2, characterized in that: The base is also provided with a push-pull handle.

4. The rapid pressing device according to claim 1, characterized in that: The base comprises a cylinder barrel and two cylinder covers, and the two cylinder covers are sealedly connected to the cylinder barrel and together enclose a sealed cavity.

5. The rapid pressing device according to claim 4, characterized in that: The piston is slidably sealed with the inner wall of the cylinder, and guide parts are respectively provided at both ends of the piston, and the guide parts pass through the corresponding end covers and are slidably sealed with the corresponding end covers; the pressure tube is axially penetrated through the guide parts.

6. The rapid pressing device according to claim 1, characterized in that: The expansion chuck further comprises a connecting seat and a pressure cover. The pressure cover is detachably connected to the connecting seat and presses the expansion arm together. The connecting seat is connected to the base.

7. The rapid pressing device according to claim 1, characterized in that: One end of the pressure-pressing pipe away from the sealing plug is connected with a pressure detection unit.

8. The rapid suppression device according to any one of claims 1 to 7, characterized in that: It also includes an independently arranged restraining ring, the inner diameter of which is larger than the outer diameter of the expansion chuck.

9. A rapid pressure test device suitable for batch pipe fittings, characterized by: It comprises a hydraulic source, an air pressure source, and two groups of rapid suppressing devices as described in any one of claims 1 to 8; wherein the first hydraulic connector and the second hydraulic connector are respectively connected to the hydraulic source through a control valve, and the air pressure source is connected to the suppressing pipe through a control valve.

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