Hydraulic sealing performance testing device for pipeline or valve

Abstract

The utility model relates to the field of sealing performance testing, and discloses a hydraulic sealing performance testing device for a pipeline or a valve. Comprising a bottom plate, a top plate supported above the bottom plate through a plurality of guide columns, a movable plate movably arranged on the guide columns, a hydraulic cylinder arranged on the bottom plate and used for controlling the movable plate to ascend and descend, and two sealing end plates arranged oppositely and arranged on the movable plate and the top plate correspondingly. The hollow hydraulic cylinder is fixedly installed on the top plate, the annular plate is connected with an ejector rod of the hollow hydraulic cylinder, the pull rods are installed on the annular plate in an annular array mode, one ends of the pull rods are fixedly connected with the annular plate, and the other ends of the pull rods penetrate through the top plate and through holes in the movable plate to be in threaded connection with nuts. According to the utility model, the annular plate is controlled by the hollow hydraulic cylinder to realize synchronous pulling of the plurality of pull rods, the sealing performance of the edge of a large-diameter pipeline or a valve is ensured, and compared with a traditional mode of manually tightening bolts one by one, the operation is simple, and the test efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of sealing performance testing, in particular to a pipeline or valve hydraulic sealing performance testing device. Background Art

[0002] In the field of engineering material testing, pipeline hydraulic sealing performance testing is a critical task used to evaluate the sealing performance of pipelines and fittings. Before conducting hydraulic and hydraulic tests on stainless steel pipes, fittings, valves, and ductile iron pipes, samples must be processed and prepared.

[0003] Traditional methods for testing the hydraulic seals of various engineering materials are complex and require the pipe sample to be sealed at both ends individually, then connected to a hydrostatic testing machine for the final hydraulic seal test. This excessive number of steps results in high processing costs and reduced testing efficiency.

[0004] The Chinese patent with application date of 2021-09-15 and application number CN202122236518.3 discloses a pressure test fixture for pipe fittings, which seals and fixes the tested pipe fittings through a sealing end plate and a second fixed plate, connects a hydrostatic testing machine to the sealing end plate, and pressurizes the tested pipe fittings through the sealing end plate, thereby performing a pressure test on the pipe fittings. When testing multiple tested pipe fittings, it is only necessary to drive the movable plate to move through a telescopic device to replace the tested pipe fittings or seal the tested pipe fittings, which reduces the test steps and improves the efficiency of the test. However, this pressure test fixture still has the following defects:

[0005] 1. When testing pipe fittings with larger diameters, it is necessary to tighten the movable plate using multiple screws on the periphery of the movable plate. During the tightening operation, it is necessary to use a torque wrench to tighten the nuts on the multiple screws on the second fixed plate, which results in cumbersome operation and low efficiency.

[0006] 2. The sealing end plate structure it adopts is suitable for water pressure sealing test of certain valves, because the adjusting hand wheel on the valve may interfere with the movable plate or the second fixed plate and cannot be installed.

[0007] Based on this, the present application develops a pipeline or valve hydraulic sealing performance testing device suitable for water pressure sealing tests on pipelines or valves of different diameters, which has the advantages of simple operation and high testing efficiency. Utility Model Content

[0008] The utility model aims to solve the technical problems existing in the prior art. To this end, the utility model provides a pipeline or valve hydraulic sealing performance test device which is simple to operate, has high test efficiency, and can meet the requirements of conducting water pressure sealing tests on pipelines or valves of different diameters.

[0009] The technical solution adopted by the utility model to solve its technical problems is:

[0010] A pipeline or valve hydraulic sealing performance test device is provided, comprising a base plate, a top plate supported above the base plate by multiple guide columns, a movable plate movably arranged on the guide columns, a hydraulic cylinder arranged on the base plate for controlling the lifting and lowering of the movable plate, and two sealing end plates arranged opposite to each other and respectively arranged on the movable plate and the top plate; it also includes an annular plate, a hollow hydraulic cylinder and multiple pull rods, the hollow hydraulic cylinder is fixedly mounted on the top plate, the annular plate is connected to the ejector rod of the hollow hydraulic cylinder, and multiple pull rods are mounted on the annular plate in an annular array, one end of which is fixedly connected to the annular plate, and the other end passes through the through holes on the top plate and the movable plate and is screwed to a nut.

[0011] In some optional embodiments, a water hole and an exhaust hole are respectively provided at the center positions of the movable plate and the top plate, a top head is provided at the bottom of the movable plate at the water hole, a water inlet is provided on the side of the top head, and a valve switch for exhaust is provided on the side of the exhaust hole away from the sealing end plate.

[0012] In some optional embodiments, the mandrel is provided with a recess for positioning the hydraulic cylinder.

[0013] In some optional embodiments, the sealing end plate includes a disc-type sealing end plate for sealing a pipeline and a column-type sealing end plate for sealing a valve.

[0014] In some optional embodiments, the disc-type sealing end plate is provided with an inner sealing groove and an outer sealing groove, and the inner sealing groove and the outer sealing groove are respectively provided with an inner sealing ring and an outer sealing ring, which are respectively used to seal the small-diameter pipe and the large-diameter pipe that match them, wherein the inner sealing ring is screwed to the through hole of the sealing end plate through a hollow bolt and pressed onto the sealing end plate.

[0015] In some optional embodiments, a sealing groove is provided on the columnar sealing end plate, a sealing gasket is provided in the sealing groove, and the sealing gasket is screwed to the through hole of the sealing end plate through a hollow bolt and pressed against the sealing end plate.

[0016] In some optional embodiments, the upper surface of the sealing gasket protrudes from the columnar sealing end plate.

[0017] In some optional embodiments, a bracket is further included, which includes support beams arranged on both sides of the bottom plate and a plurality of support rods with one end fixedly connected to the support beam and the other end fixedly connected to the top plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The utility model is provided with a hollow hydraulic cylinder and an annular plate on the top plate. The hollow hydraulic cylinder is used to control the annular plate to synchronously pull multiple pull rods. This ensures the sealing of the edges of large-diameter pipes or valves when conducting water pressure tests on them. Compared with the traditional method of manually tightening bolts one by one, this method is not only simple to operate, but also greatly improves the test efficiency.

[0020] 2. The design of columnar sealing end plate can effectively increase the distance between the valve and the movable plate and top plate, meet the water pressure test requirements of the valve, and improve the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0022] Figure 1 This is a three-dimensional structural diagram of a pipeline or valve hydraulic sealing performance test device provided by the utility model;

[0023] Figure 2 This is a cross-sectional view of a pipeline or valve hydraulic sealing performance test device provided by the utility model;

[0024] Figure 3 This is a cross-sectional view of the assembly of the disc-type sealing end plate, the mandrel and the movable plate provided by the utility model;

[0025] Figure 4 This is a cross-sectional view of the columnar sealing end plate provided by the present utility model;

[0026] Figure 5 This is a state diagram of the valve water pressure test provided by the utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 1—Bottom plate, 2—Top plate, 3—Guide column, 4—Movable plate, 5—Hydraulic cylinder, 6—Sealing end plate, 6A—Disc-type sealing end plate, 6A.1—Inner sealing ring, 6A.2—Outer sealing ring, 6B—Column-type sealing end plate, 6B.1—Sealing gasket, 7—Hollow hydraulic cylinder, 8—Annular plate, 9—Tie rod, 10—Bracket, 10.1—Support beam, 10.2—Strut, 11—Top head, 11.1—Water inlet, 11.2—Pit, 12—Valve switch, 13—Hollow bolt, 100—Valve. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; the terms "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0033] Example 1

[0034] This embodiment provides a pipeline or valve hydraulic sealing performance test device, as shown in the attached Figure 1 and attached Figure 2 As shown, it includes a bottom plate 1, a top plate 2, a guide column 3, a movable plate 4, a hydraulic cylinder 5, a sealing end plate 6, a hollow hydraulic cylinder 7, an annular plate 8, a pull rod 9 and a bracket 10, wherein:

[0035] The top plate 2 is supported above the bottom plate 1 by a plurality of guide columns 3; the bracket 10 includes a support beam 10.1 provided on both sides of the bottom plate 1 and a plurality of struts 10.2 with one end fixedly connected to the support beam 10.1 and the other end fixedly connected to the top plate 2. The bracket can increase the connection stability between the top plate and the bottom plate; the movable plate 4 is movably provided on the guide column 3 and can move up and down along the direction of the guide column; the hydraulic cylinder 5 is provided on the bottom plate 1 and can control the movable plate to move up and down along the direction of the guide column; there are two sealing end plates 6, which are respectively installed on the movable plate 4 and the top plate 2, and are used to seal the two ends of the pipe or valve for water pressure test.

[0036] Specifically, as attached Figure 2 and attached Figure 3 As shown, the movable plate 4 and top plate 2 are respectively provided with a water hole and an exhaust hole at their centers. A header 11 is provided at the bottom of the movable plate 4, located at the water hole. A water inlet 11.1 is provided on the side of the header 11. A valve switch 12 for exhaust is provided on the side of the exhaust hole away from the sealed end plate 6. During a hydraulic pressure test, water enters through the header's water inlet, passes through the movable plate's water hole and the sealed end plate thereon, and enters the pipe or valve. Air within the pipe or valve is discharged from the valve through the sealed end plate and the exhaust hole on the top plate as water is injected. After the air is discharged, the valve is closed. Preferably, a recess 11.2 for positioning the hydraulic cylinder is provided on the header 11, allowing the hydraulic cylinder to accurately act on the center of the movable plate to ensure uniform force.

[0037] The hollow hydraulic cylinder 7 is fixedly mounted on the top plate 2; the annular plate 8 is connected to the ejector rod of the hollow hydraulic cylinder 7; a plurality of pull rods 9 are mounted in an annular array on the annular plate 8, one end of which is fixedly connected to the annular plate 8, and the other end passes through the through holes on the top plate 2 and the movable plate 4 and is screwed to the nut.

[0038] For large-diameter pipes or valves, the size of the hydraulic cylinder makes it difficult to ensure the peripheral sealing of the pipe or valve during a hydrostatic test. Therefore, it is necessary to use a pull rod to tighten the movable plate to ensure the sealing of the pipe or valve during the hydrostatic test. This embodiment provides a hollow hydraulic cylinder and annular plate on the top plate. The hollow hydraulic cylinder controls the annular plate to achieve synchronous pulling of multiple pull rods, ensuring the sealing of the pipe or valve edge during the hydrostatic test of large-diameter pipes or valves. Compared with the traditional method of manually tightening bolts one by one, this method is not only simple to operate, but also greatly improves testing efficiency.

[0039] Preferably, as attached Figure 3 To the attached Figure 5As shown, the sealing end plate 6 includes a disc-type sealing end plate 6A for pipeline sealing and a column-type sealing end plate 6B for sealing the valve 100; wherein: the disc-type sealing end plate 6A is provided with an inner sealing groove and an outer sealing groove, and the inner sealing groove and the outer sealing groove are respectively provided with an inner sealing ring 6A.1 and an outer sealing ring 6A.2, which are respectively used to seal the small-diameter pipeline and the large-diameter pipeline matched therewith, wherein the inner sealing ring 6A.1 is screwed to the through hole of the sealing end plate through a hollow bolt 13 and pressed against the sealing end plate; similarly, a sealing groove is provided on the column-type sealing end plate 6B, and a sealing gasket 6B.1 is provided in the sealing groove, and the sealing gasket is screwed to the through hole of the sealing end plate through a hollow bolt 13 and pressed against the sealing end plate; the upper surface of the sealing gasket 6B.1 protrudes from the column-type sealing end plate.

[0040] When conducting a water pressure test on a pipe or valve, select the corresponding disc seal end plate or column seal end plate; the specific operation is as follows:

[0041] 1. Place the pipe or valve on the sealing end plate of the movable plate;

[0042] 2. Control the hydraulic cylinder to lift the movable plate so that both ends of the pipeline are sealed through the sealing end plates;

[0043] 3. For large diameter pipes, it is necessary to control the hollow hydraulic cylinder to lift the annular plate and use multiple tie rods to tighten the movable plate. It is worth noting that for small diameter pipes or valves, multiple tie rods can also be used to tighten the movable plate to increase the safety of the test process.

[0044] 4. Connect the water inlet of the device to the hydrostatic testing machine through a connecting pipe;

[0045] 5. Open the valve and inject water into the pipe or valve. After the air in the pipe or valve is exhausted, close the valve.

[0046] 6. Conduct water pressure test.

[0047] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pipeline or valve hydraulic sealing performance test device, comprising a base plate, a top plate supported above the base plate by a plurality of guide pillars, a movable plate movably mounted on the guide pillars, a hydraulic cylinder mounted on the base plate for controlling the raising and lowering of the movable plate, and two opposing sealing end plates, one mounted on the movable plate and the other on the top plate; characterized in that: It also includes an annular plate, a hollow hydraulic cylinder and multiple pull rods. The hollow hydraulic cylinder is fixedly installed on the top plate. The annular plate is connected to the ejector rod of the hollow hydraulic cylinder. Multiple pull rods are installed in an annular array on the annular plate, one end of which is fixedly connected to the annular plate, and the other end passes through the through holes on the top plate and the movable plate and is screwed to the nut.

2. The pipeline or valve hydraulic sealing performance test device according to claim 1, characterized in that: A water hole and an exhaust hole are respectively provided at the center positions of the movable plate and the top plate. A top head is provided at the bottom of the movable plate at the water hole, a water inlet is provided on the side of the top head, and a valve switch for exhaust is provided on the side of the exhaust hole away from the sealing end plate.

3. The pipeline or valve hydraulic sealing performance test device according to claim 2, characterized in that: The mandrel is provided with a recess for positioning the hydraulic cylinder.

4. The pipeline or valve hydraulic sealing performance test device according to claim 1, characterized in that: The sealing end plates include disc-type sealing end plates for pipeline sealing and column-type sealing end plates for valve sealing.

5. The pipeline or valve hydraulic sealing performance test device according to claim 4, characterized in that: The disc-type sealing end plate is provided with an inner sealing groove and an outer sealing groove, and the inner sealing groove and the outer sealing groove are respectively provided with an inner sealing ring and an outer sealing ring, which are respectively used to seal the small-diameter pipe and the large-diameter pipe that match them, wherein the inner sealing ring is screwed to the through hole of the sealing end plate through a hollow bolt and pressed against the sealing end plate.

6. The pipeline or valve hydraulic sealing performance test device according to claim 4, characterized in that: The columnar sealing end plate is provided with a sealing groove, a sealing gasket is provided in the sealing groove, and the sealing gasket is screwed to the through hole of the sealing end plate through a hollow bolt and pressed against the sealing end plate.

7. The pipeline or valve hydraulic sealing performance test device according to claim 6, characterized in that: The upper surface of the sealing gasket protrudes a columnar sealing end plate.

8. The pipeline or valve hydraulic sealing performance test device according to any one of claims 1 to 7, characterized in that: It also includes a bracket, which includes support beams arranged on both sides of the bottom plate and a plurality of support rods with one end fixedly connected to the support beam and the other end fixedly connected to the top plate.

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