Hydrostatic test device for composite material cylinder

Abstract

The invention relates to a hydrostatic test device for a composite cylinder, and belongs to the technical field of cylinder hydrostatic tests. Comprising a fixing support, a horizontal inner cylinder is fixedly arranged on the fixing support, the inner cylinder is sleeved with a composite cylinder body, a rear side sealing assembly is arranged between the rear end of the inner cylinder and the rear end of the composite cylinder body, a front side sealing assembly is arranged between the front end of the inner cylinder and the front end of the composite cylinder body, and a guide rail is arranged below the inner cylinder; a walking trolley and a rear end supporting trolley are arranged on the guide rail in a sliding mode, the composite material barrel is supported through the walking trolley, and the rear side sealing assembly is supported through the rear end supporting trolley; the core lies in that the test device and a single axial end face of a product are sealed, a sealing mode combining axial sealing and radial sealing is converted through an inner cylinder and a sealing assembly of the inner cylinder, the axial force of water pressure on a tool end cover is eliminated, and the problem that an existing metal cylinder water pressure test device cannot be suitable for a composite material cylinder is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of cylinder water pressure testing, and in particular relates to a water pressure testing device for a composite material cylinder. Background Art

[0002] The cylinder structure is a typical structural part of the ground weapon system. The early cylinder structures were made of metal materials, mostly aluminum alloy materials. With the continuous development of national defense and domestic material professional disciplines, the requirements for lightweight cylinder structures are getting higher and higher, so composite cylinder structures came into being. Composite cylinders were initially mostly made of wet winding molding technology, but now they are gradually dominated by carbon fiber and glass fiber composite materials. In order to ensure that the manufactured composite cylinder can fully meet the test requirements, various tests on the mechanical properties of the composite cylinder are inevitable. In order to assess the performance of the composite cylinder in withstanding internal pressure, it is necessary to conduct a water pressure sealing test on it.

[0003] The composite cylinder is generally long in length and large in diameter. The hydraulic pressure test device provided by the present invention is generally for composite cylinder structures with a length between 5m and 10m and a diameter between 600mm and 1200mm. Due to the unique process of the composite material molding process, the cylinder structure cannot withstand a large axial pressure, and the typical cylinder hydraulic pressure test structure of the conventional end cover 50 plus the tie rod 52 cannot be used, such as Figure 1 As shown, in the typical cylinder water pressure test structure, the pull rod 52 is required to press the end caps 50 on both sides to apply a large axial force to the metal cylinder 51, and the end caps 50 and the metal cylinder 51 are sealed on the basis of overcoming the force of the water pressure on the end caps 50. Therefore, the metal cylinder 51 is subjected to a large axial pressure when it is installed and not pressurized. In addition, the outer circle roughness value of the composite cylinder structure is relatively high, and the outer circle radial sealing method is not considered. Summary of the invention

[0004] The present invention overcomes the shortcomings of the prior art and provides a water pressure test device for a composite material cylinder, thereby solving the problem that the current metal cylinder water pressure test device cannot be applied to a composite material cylinder.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0006] A water pressure testing device for a composite cylinder comprises a fixed bracket, a horizontal inner cylinder is fixedly arranged on the fixed bracket, the composite cylinder is sleeved on the outer side of the inner cylinder, a rear side sealing assembly is arranged between the rear end of the inner cylinder and the rear end of the composite cylinder, a front side sealing assembly is arranged between the front end of the inner cylinder and the front end of the composite cylinder, a guide rail is arranged below the inner cylinder, a plurality of traveling trolleys and a rear end supporting trolley are slidably arranged on the guide rail, the composite cylinder is supported by the traveling trolley, and the rear side sealing assembly is supported by the rear end supporting trolley.

[0007] Furthermore, the fixed bracket includes an intermediate bracket and two outer brackets; a fixing plate is fixedly arranged on the rear side of the intermediate bracket, and the outer brackets are planar frame structures arranged in front and rear vertical planes, and the front ends of the two outer brackets are respectively fixedly connected to the left and right edges of the rear side of the intermediate bracket.

[0008] Furthermore, the front and rear ends of the inner cylinder remain open, a mounting plate is fixedly arranged on the outside of the front end opening of the inner cylinder, a circle of first through holes and a circle of first threaded holes are arranged on the rear end surface of the mounting plate, a fixing flange is fixedly arranged on the inside of the rear end opening of the inner cylinder, and a circle of second through holes are arranged on the fixing flange; a supporting plate is fixedly arranged inside the fixing flange, and a plug-in hole that passes through the front and rear is arranged at the center of the supporting plate; a circle of fixing threaded holes is arranged on the fixing plate, a circle of first through holes on the mounting plate corresponds to a circle of fixing threaded holes on the fixing plate, a circle of first fixing bolts pass through the first through holes and are threadedly connected with the corresponding fixing threaded holes, thereby fixing the inner cylinder to the fixing bracket.

[0009] Furthermore, two left-right symmetrical guide rails are horizontally arranged on the ground along the front-back direction; a walking wheel is arranged at the lower end of the walking trolley, and two guide wheels are respectively arranged at the left and right ends of the walking trolley, and the guide wheels are in rolling contact with the inner side surfaces of the guide rails on the same side, and a liftable arc-shaped supporting seat is arranged at the upper end of the walking trolley, and the supporting seat is in contact with the lower end of the outer side surface of the composite material cylinder.

[0010] Furthermore, a walking wheel is provided at the lower end of the rear end supporting trolley, and two guide wheels are respectively provided at the left and right ends of the rear end supporting trolley, the guide wheels are in rolling contact with the inner side surfaces of the guide rails on the same side, a fixed seat is fixedly provided on the upper end surface of the rear end supporting trolley, a mechanical jack is fixedly provided on the upper end of the fixed seat, a sleeve is fixedly provided on the upper end of the action rod of the mechanical jack, a front-to-rear horizontal adjusting rod is fixedly inserted inside the sleeve, and the front end of the adjusting rod is inserted into the plug hole of the support plate.

[0011] Further, the front side sealing assembly includes a front flange, a front sealing cover, a front side locking bolt, and a gasket; the front flange includes a first cylinder and a first ring, the first ring is fixedly arranged on the outer side of the rear end opening of the first cylinder; a circle of second threaded holes is arranged at the rear end face of the first ring; a circle of first annular clamping grooves is arranged at the inner edge of the rear end face of the first ring, and a circle of axial sealing grooves is arranged at the bottom annular surface of the first clamping groove; the front sealing cover includes a second cylinder and a second ring, the second ring is fixedly arranged at the front end opening of the second cylinder; a circle of second annular clamping grooves is arranged at the outer edge of the rear end face of the second cylinder; two circles of parallel radial sealing grooves are arranged on the inner cylindrical surface of the second clamping groove; a circle of axial sealing grooves is arranged on the rear end face of the second ring, and a circle of third through holes is fixedly arranged on the second ring; a circle of gaskets is fixedly arranged at the rear end face of the second ring of the front sealing cover; sealing rings are arranged inside the axial sealing groove and the radial sealing groove.

[0012] Furthermore, the front sealing cover is sleeved on the outside of the front end opening of the inner cylinder, and the front end face of the second circular ring of the front sealing cover contacts the rear end face of the mounting plate, a circle of third through holes on the second circular ring corresponds one-to-one to a circle of first threaded holes on the mounting plate, and the second fixing bolt passes through the third through hole and is threadedly connected with the corresponding first threaded hole; the front end opening of the first cylinder of the front flange is sleeved on the second clamping groove at the rear end of the second cylinder of the front sealing cover, the front end face of the first cylinder contacts the bottom circular ring surface of the second clamping groove, and the front end outer side surface of the first cylinder contacts the inner cylindrical surface of the second clamping groove; a circle of second threaded holes on the first circular ring of the front flange corresponds one-to-one to a circle of gaskets, and a circle of front side locking bolts is threadedly connected to the inside of the second threaded holes and contacts the rear end face of the corresponding gasket; the front end of the composite material cylinder is inserted into the inside of the first clamping groove of the front flange, and the front end face of the composite material cylinder contacts the bottom circular ring surface of the first clamping groove.

[0013] Furthermore, the rear sealing assembly includes a rear flange, a rear sealing cover, and a rear locking bolt; the rear flange includes a third ring and a third cylinder; the third ring is fixedly arranged on the outer side of the front end opening of the third cylinder; a circle of annular third clamping grooves is arranged at the inner edge of the front end face of the third ring, and a circle of axial sealing grooves is arranged at the bottom annular surface of the third clamping groove; the rear sealing cover includes a fourth ring, a fourth cylinder, and a fifth cylinder; the fourth cylinder is located on the outer side of the fifth cylinder, the rear end of the fourth cylinder is fixedly arranged in the middle of the front end face of the fourth ring, and the rear end of the fifth cylinder is fixedly arranged at the inner edge of the front end face of the fourth ring; the outer side surface of the fifth cylinder is a conical structure with a thin front and a thick back; two circles of parallel radial sealing grooves are arranged on the outer cylindrical surface of the fourth cylinder; a circle of third threaded holes is arranged at the outer edge of the fourth ring; a circle of fourth through holes is arranged at the inner edge of the fourth ring.

[0014] Furthermore, the rear end opening of the composite material cylinder is inserted into the third clamping groove of the rear flange, and the rear end surface of the composite material cylinder contacts the bottom annular surface of the third clamping groove; the fourth cylinder of the rear sealing cover is sleeved on the outer side of the third cylinder of the rear flange, the rear end surface of the third cylinder contacts the front end surface of the fourth annular ring, and the inner cylindrical surface of the third cylinder contacts the outer cylindrical surface of the fourth cylinder; a circle of third threaded holes on the fourth annular ring are respectively screwed with a rear locking bolt, and the end of the rear locking bolt contacts the rear end surface of the third annular ring of the rear flange; The fixed flange at the rear end of the inner cylinder is sleeved on the outer side of the fifth cylinder of the rear sealing cover, and the rear end face of the fixed flange is in contact with the front end face of the fourth ring of the rear sealing cover; a circle of axial sealing grooves is arranged on the rear end face of the fixed flange; sealing rings are arranged inside the axial sealing grooves and the radial sealing grooves; a circle of second through holes on the fixed flange corresponds to a circle of fourth through holes on the fourth ring one by one, and a circle of third fixing bolts pass through the corresponding second through holes and fourth through holes in sequence and are screwed with fixing nuts, thereby fixing the rear sealing cover to the inner end of the inner cylinder.

[0015] Furthermore, an openable and closable water inlet is provided on the side wall of the first cylinder of the front flange.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: The water pressure test device provided by the present invention is targeted at composite cylinders with a length range of 5m to 10m and a diameter DN between 600mm and 1200mm. A single composite cylinder structure is light in weight. For example, with a diameter of DN=900mm and a length of 9m, the weight is only about 1t, and the test water pressure is about 2MPa. Composite cylinders cannot withstand large axial forces, or in other words, the end faces of composite cylinders cannot be sealed by a conventional tension rod compression method that applies axial forces. Therefore, the device solves the sealing problem of composite cylinders by designing a unique inner cylinder + a multi-channel sealing structure at both ends, and on this basis, provides a solution for composite cylinder water pressure testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a structural schematic diagram of an existing water pressure test device; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A; Figure 4 yes Figure 2 A partial enlarged schematic diagram of point B in the middle; Figure 5 It is a structural schematic diagram of a fixed bracket and a guide rail; Figure 6 It is a structural diagram of the walking trolley; Figure 7 It is a schematic diagram of the structure of the inner cylinder; Figure 8 yes Figure 7 A partial enlarged schematic diagram of point C in the middle; Fig. 9 is a schematic diagram of the structure of the front sealing cover; Fig.10 It is a schematic diagram of the structure of the front flange; Fig.11 is a cross-sectional view of the front side sealing assembly; Fig.12 yes Fig.11 A local enlarged schematic diagram in FIG. Fig.13 It is a schematic diagram of the structure of the rear flange; Fig.14 is a schematic diagram of the structure of the rear sealing cover; Fig.15 It is a schematic diagram of the cooperation between the rear side sealing assembly, the inner cylinder and the composite cylinder; Fig.16 is a cross-sectional view of the rear side sealing assembly; Fig.17 yes Fig.16 A local enlarged schematic diagram in FIG. Among them, 1 is a fixed bracket, 2 is an inner cylinder, 3 is a composite material cylinder, 4 is a rear side sealing assembly, 5 is a front side sealing assembly, 6 is a guide rail, 7 is a walking trolley, 8 is a rear end support trolley, 9 is an intermediate bracket, 10 is an outer bracket, 11 is a fixed plate, 12 is a mounting plate, 13 is a fixed flange, 14 is a support plate, 15 is a first fixing bolt, 16 is a supporting seat, 17 is a fixing seat, 18 is a mechanical jack, 19 is a sleeve, 20 is an adjusting rod, 21 is a front flange, 22 is a front sealing cover, 23 is a front side locking bolt, 24 is a cushion block, 25 is a first cylinder, 26 is a first ring, 27 is a second threaded hole, 28 is a second threaded hole, 29 is a second threaded hole, 30 is a second threaded hole, 31 is a second threaded hole, 32 is a second threaded hole, 33 is a second threaded hole, 34 is a second threaded hole, 35 is a second threaded hole, 36 is a second threaded hole, 37 is a second threaded hole, 38 is a second threaded hole, 39 is a second threaded hole, 40 is a second threaded hole, 41 is a second threaded hole, 42 is a second threaded hole, 43 is a second threaded hole, 44 is a second threaded hole, 45 is a second threaded hole, 46 is a second threaded hole, 47 is a second threaded hole, 48 is a second threaded hole, 49 is a second threaded hole, 50 is a second threaded hole, 51 is a second threaded hole, 52 is a second threaded hole, 53 is a second threaded hole, 54 is a second threaded hole, 55 is a second threaded hole, 5 8 is the first clamping groove, 29 is the axial sealing groove, 30 is the second cylinder, 31 is the second ring, 32 is the radial sealing groove, 33 is the third through hole, 34 is the second clamping groove, 35 is the rear flange, 36 is the rear sealing cover, 37 is the rear locking bolt, 38 is the third ring, 39 is the third cylinder, 40 is the third clamping groove, 41 is the fourth ring, 42 is the fourth cylinder, 43 is the fifth cylinder, 44 is the third threaded hole, 45 is the fourth through hole, 46 is the third fixing bolt, 47 is the connecting ear plate, 48 is the fifth through hole, 49 is the connecting plate, 50 is the end cover, 51 is the metal cylinder, 52 is the pull rod, and 53 is the fastener. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. 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. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0019] like Figure 2 As shown in FIG. 17 , the present invention provides a water pressure testing device for a composite cylinder, comprising a fixed bracket 1, on which a horizontal inner cylinder 2 is fixedly arranged, the composite cylinder 3 is sleeved on the outer side of the inner cylinder 2, a rear side sealing assembly 4 is arranged between the rear end of the inner cylinder 2 and the rear end of the composite cylinder 3, a front side sealing assembly 5 is arranged between the front end of the inner cylinder 2 and the front end of the composite cylinder 3, a guide rail 6 is arranged below the inner cylinder 2, a plurality of traveling trolleys 7 and a rear end supporting trolley 8 are slidably arranged on the guide rail 6, the composite cylinder 3 is supported by the traveling trolley 7, and the rear side sealing assembly 4 is supported by the rear end supporting trolley 8.

[0020] The fixed bracket 1 includes an intermediate bracket 9 and two outer brackets 10. The intermediate bracket 9 is a square frame structure, and a fixed plate 11 is fixedly arranged on the rear side of the intermediate bracket 9, and the fixed plate 11 is located in a vertical plane in the left and right directions. The outer brackets 10 are a planar frame structure arranged in a front and rear vertical plane, and the front ends of the two outer brackets 10 are fixedly connected to the left and right edges of the rear side of the intermediate bracket 9 respectively. The outer brackets 10 on both sides are arranged to enhance the overall structural strength of the fixed bracket 1 and prevent the long cantilever structure of the water pressure test device from tipping over after the inner tube 2 is installed.

[0021] The inner tube 2 is a circular cylindrical structure arranged horizontally in the front and rear directions, and the front and rear ends of the inner tube 2 remain open. A mounting plate 12 is fixedly arranged outside the front end opening of the inner tube 2, and the mounting plate 12 is a circular plate-shaped structure located inside the left and right vertical planes; a concentric circle of first through holes and a circle of first threaded holes are arranged on the rear end surface of the mounting plate 12, and the circle of first through holes is located outside the circle of first threaded holes. A fixed flange 13 is fixedly arranged inside the rear end opening of the inner tube 2, and the fixed flange 13 is a circular plate-shaped structure located in the left and right vertical planes; a circle of second through holes is arranged on the fixed flange 13. A support plate 14 is fixedly arranged inside the fixed flange 13, and the support plate 14 is located in the vertical plane in the left and right directions; a plug-in hole that passes through the front and back is arranged at the center of the support plate 14.

[0022] A circle of fixing threaded holes is provided on the fixing plate 11, the front end face of the mounting plate 12 of the inner cylinder 2 contacts the rear end face of the fixing plate 11, a circle of first through holes on the mounting plate 12 corresponds to a circle of fixing threaded holes on the fixing plate 11, a circle of first fixing bolts 15 passes through the first through holes and is screwed into the corresponding fixing threaded holes, thereby fixing the inner cylinder 2 on the fixing bracket 1.

[0023] There are two guide rails 6 , and the two left-right symmetrical guide rails 6 are horizontally arranged on the ground along the front-back direction.

[0024] The lower end of the trolley 7 is provided with a traveling wheel, which is rollingly arranged on the ground. Two guide wheels are respectively arranged at the left and right ends of the trolley 7, and the guide wheels are in rolling contact with the inner side surface of the guide rail 6 on the same side. The stability of the trolley 7 when moving forward and backward is ensured by the mutual cooperation between the guide wheels and the guide rail 6. A liftable arc-shaped supporting seat 16 is arranged at the upper end of the trolley 7, and the supporting seat 16 is in contact with the lower end of the outer side surface of the composite material cylinder 3, and the composite material cylinder 3 is supported by the liftable supporting seat 16.

[0025] The lower end of the rear end support trolley 8 is provided with a running wheel, which is rollingly arranged on the ground. Two guide wheels are respectively arranged at the left and right ends of the rear end support trolley 8, and the guide wheels are in rolling contact with the inner side surface of the guide rail 6 on the same side. The stability of the rear end support trolley 8 when moving forward and backward is ensured by the mutual cooperation between the guide wheels and the guide rail 6. A fixed seat 17 is fixedly arranged on the upper end surface of the rear end support trolley 8, and a mechanical jack 18 is fixedly arranged on the upper end of the fixed seat 17, and the action rod of the mechanical jack 18 is vertically upward. A sleeve 19 is fixedly arranged on the upper end of the action rod of the mechanical jack 18, and a front-to-back horizontal adjustment rod 20 is fixedly inserted inside the sleeve 19, and the front end of the adjustment rod 20 is inserted into the plug hole of the support plate 14. The up and down movement of the sleeve 19 is realized by the extension and retraction of the action rod of the mechanical jack 18, and the sleeve 19 drives the support plate 14 to move up and down through the adjustment rod 20, thereby supporting the rear end of the inner tube 2, ensuring that the inner tube 2 is always in a front-to-back horizontal state.

[0026] The front sealing assembly 5 includes a front flange 21 , a front sealing cover 22 , a front locking bolt 23 , and a gasket 24 .

[0027] The front flange 21 includes a first cylinder 25 and a first ring 26. The first cylinder 25 is a cylindrical structure with both ends open. The first ring 26 is fixedly arranged outside the rear end opening of the first cylinder 25. A circle of second threaded holes 27 is arranged at the rear end surface of the first ring 26. A circle of first annular clamping grooves 28 are arranged at the inner edge of the rear end surface of the first ring 26. The inner diameter of the first clamping groove 28 is equal to the outer diameter of the composite material cylinder 3; a circle of axial sealing grooves 29 are arranged at the bottom annular surface of the first clamping groove 28.

[0028] The front sealing cover 22 includes a second cylinder 30 and a second ring 31. The second cylinder 30 is a cylindrical structure with both ends open. The second ring 31 is fixedly arranged at the front opening of the second cylinder 30. A circle of annular second clamping grooves 34 is arranged at the outer edge of the rear end surface of the second cylinder 30. The outer diameter of the second clamping groove 34 is equal to the inner diameter of the first cylinder 25. Two circles of parallel radial sealing grooves 32 are arranged on the inner cylindrical surface of the second clamping groove 34. A circle of axial sealing grooves 29 is arranged on the rear end surface of the second ring 31, and a circle of third through holes 33 are fixedly arranged on the second ring 31.

[0029] A circle of gasket blocks 24 is fixedly disposed on the rear end surface of the second circular ring 31 of the front sealing cover 22 .

[0030] The front sealing cover 22 is sleeved on the outer side of the front opening of the inner tube 2, and the front end face of the second ring 31 of the front sealing cover 22 contacts the rear end face of the mounting plate 12. The circle of third through holes 33 on the second ring 31 corresponds to the circle of first threaded holes on the mounting plate 12. The second fixing bolts pass through the third through holes 33 and are screwed to the corresponding first threaded holes. The front sealing cover 22 is fixed to the mounting plate 12 by the circle of second fixing bolts. The axial sealing groove 29 at the front end face of the second ring 31 of the front sealing cover 22 and the rear end face of the mounting plate 12 form a Fig.12 The I position in the middle is sealed, and a sealing ring is installed inside the axial sealing groove 29.

[0031] The front end opening of the first cylinder 25 of the front flange 21 is sleeved on the second clamping groove 34 at the rear end of the second cylinder 30 of the front sealing cover 22. The front end surface of the first cylinder 25 contacts the bottom annular surface of the second clamping groove 34, and the front end outer side surface of the first cylinder 25 contacts the inner cylindrical surface of the second clamping groove 34. The two radial sealing grooves 32 on the inner cylindrical surface of the second clamping groove 34 and the outer side surface of the first cylinder 25 form a sealing groove. Fig.12 The two II positions are sealed, and a sealing ring is installed inside the radial sealing groove 32.

[0032] A circle of second threaded holes 27 on the first circular ring 26 of the front flange 21 corresponds to a circle of pads 24 one by one, and a circle of front locking bolts 23 is screwed into the second threaded holes 27 and contacts the rear end surface of the corresponding pads 24 .

[0033] The front end of the composite cylinder 3 is inserted into the first clamping groove 28 of the front flange 21, and the front end surface of the composite cylinder 3 contacts the bottom annular surface of the first clamping groove 28. The axial sealing groove 29 on the bottom annular surface of the first clamping groove 28 and the front end surface of the composite cylinder 3 form a sealing groove. Fig.12 The seal is provided at point III in the middle, and a sealing ring is installed inside the axial sealing groove 29.

[0034] The rear sealing assembly 4 includes a rear flange 35 , a rear sealing cover 36 , and a rear locking bolt 37 .

[0035] The rear flange 35 includes a third ring 38 and a third cylinder 39. The third cylinder 39 is a cylindrical structure with both ends open, and the third ring 38 is fixedly arranged outside the front end opening of the third cylinder 39. A circle of annular third clamping grooves 40 are arranged at the inner edge of the front end surface of the third ring 38, and a circle of axial sealing grooves 29 are arranged at the bottom annular surface of the third clamping groove 40.

[0036] The rear sealing cover 36 includes a fourth ring 41, a fourth cylinder 42, and a fifth cylinder 43. The fourth ring 41 is a circular plate-shaped structure located in the left and right vertical planes. The fourth cylinder 42 and the fifth cylinder 43 are both cylindrical structures with open front and rear ends. The fourth cylinder 42 is located on the outside of the fifth cylinder 43, and the rear end of the fourth cylinder 42 is fixedly arranged in the middle of the front end surface of the fourth ring 41, and the rear end of the fifth cylinder 43 is fixedly arranged at the inner edge of the front end surface of the fourth ring 41. The outer side surface of the fifth cylinder 43 is a conical structure with a thin front and a thick back. Two circles of parallel radial sealing grooves 32 are arranged on the outer cylindrical surface of the fourth cylinder 42. A circle of third threaded holes 44 is arranged at the outer edge of the fourth ring 41. A circle of fourth through holes 45 is arranged at the inner edge of the fourth ring 41.

[0037] The rear end opening of the composite cylinder 3 is inserted into the third clamping groove 40 of the rear flange 35, and the rear end surface of the composite cylinder 3 is in contact with the bottom annular surface of the third clamping groove 40. The axial sealing groove 29 on the bottom annular surface of the third clamping groove 40 and the rear end surface of the composite cylinder 3 form a Fig.17 The I position in the middle is sealed, and a sealing ring is installed inside the axial sealing groove 29.

[0038] The fourth cylinder 42 of the rear sealing cover 36 is sleeved on the outside of the third cylinder 39 of the rear flange 35, the rear end face of the third cylinder 39 contacts the front end face of the fourth ring 41, the inner cylindrical surface of the third cylinder 39 contacts the outer cylindrical surface of the fourth cylinder 42, and the two radial sealing grooves 32 on the outer cylindrical surface of the fourth cylinder 42 and the inner cylindrical surface of the third cylinder 39 form a Fig.17 The two II positions are sealed, and a sealing ring is installed inside the radial sealing groove 32.

[0039] A rear locking bolt 37 is screwed into each of the third threaded holes 44 on the fourth circular ring 41 . The ends of the rear locking bolts 37 are in contact with the rear end surface of the third circular ring 38 of the rear flange 35 .

[0040] The fixed flange 13 at the rear end of the inner cylinder 2 is sleeved on the outer side of the fifth cylinder 43 of the rear sealing cover 36, and the rear end face of the fixed flange 13 contacts the front end face of the fourth ring 41 of the rear sealing cover 36. A circle of axial sealing grooves 29 are arranged on the rear end face of the fixed flange 13, and the axial sealing grooves 29 on the rear end face of the fixed flange 13 and the front end face of the fourth ring 41 form a sealing groove 29. Fig.17 The seal is provided at point III in the middle, and a sealing ring is installed inside the axial sealing groove 29.

[0041] A circle of second through holes on the fixed flange 13 corresponds one to one with a circle of fourth through holes 45 on the fourth ring 41, and a circle of third fixing bolts 46 pass through the corresponding second through holes and fourth through holes 45 in sequence and are screwed with fixing nuts, thereby fixing the rear sealing cover 36 to the inner end of the inner tube 2.

[0042] A connecting ear plate 47 is fixedly provided on the left and right sides of the outer edge of the fourth circular ring 41 of the rear sealing cover 36, and two fifth through holes 48 are respectively provided on each connecting ear plate 47. A connecting plate 49 is fixedly provided on the upper end surface of the rear end support trolley 8, and the connecting plate 49 is located in the vertical plane in the left and right directions. A semicircular arc-shaped docking groove is provided in the middle of the upper edge of the connecting plate 49, and two sixth through holes are respectively provided on the connecting plate 49 on the left and right sides of the docking groove. The four fifth through holes 48 on the two connecting ear plates 47 correspond to the four sixth through holes on the connecting plate 49 one by one, and the four fourth fixing bolts pass through the corresponding fifth through holes 48 and the sixth through holes and are screwed with fixing nuts, thereby fixing the rear sealing cover 36 to the rear end support trolley 8.

[0043] The mounting plate 12 , the front sealing assembly 5 , the rear sealing assembly 4 , the composite material cylinder 3 , and the inner cylinder 2 together form a closed area.

[0044] An openable and closable water injection port is provided on the side wall of the first cylinder 25 of the front flange 21 , and water is injected into the closed area between the composite material cylinder 3 and the inner cylinder 2 through the water injection port.

[0045] The present invention provides a method for testing a hydraulic pressure of a composite material cylinder using a hydraulic pressure testing device, comprising the following steps: The first step is to place the fixed bracket 1 in a suitable place in the workshop; The second step is to install the inner tube 2 on the fixing plate 11 of the fixing bracket 1; The third step is to assemble the front flange 21 and the front sealing cover 22 together, and then use a crane to sleeve the assembled front flange 21 and the front sealing cover 22 onto the front outer side of the inner tube 2, and fix them to the mounting plate 12; The fourth step is to place the composite material cylinder 3 on the supporting seats 16 of the plurality of traveling trolleys 7, and to use the cooperation between the traveling trolleys 7 and the guide rails 6 to sleeve the composite material cylinder 3 on the outside of the inner cylinder 2 until the front end opening of the composite material cylinder 3 is clamped in the first clamping groove 28 of the front flange 21; In the fifth step, the rear sealing cover 36 and the rear flange 35 are assembled together, and then the assembled rear flange 35 and the rear sealing cover 36 are hoisted to the rear end opening of the inner tube 2 by a crane, so that the third clamping groove 40 on the rear flange 35 is clamped with the rear end of the composite cylinder 3. Then the adjustment rod 20 on the rear end support trolley 8 is inserted into the support plate 14, and the rear end height of the inner tube 2 is adjusted by the mechanical jack 18. Then a circle of third fixing bolts 46 and fixing nuts are used to fix the rear sealing cover 36 and the inner tube 2. In this way, the rear sealing cover 36, the rear flange 35, the composite cylinder 3, the inner tube 2, the front flange 21, the front sealing cover 22, and the mounting plate 12 are fixedly connected together as a whole.

[0046] The sixth step is to tighten the front locking bolts 23 on the front flange 21 and the rear locking bolts 37 on the rear sealing cover 36 in reverse, and the front locking bolts 23 are pressed against the rear end surface of the gasket 24. The front flange 21 is pushed backward by the reaction force of the gasket 24, so that the front flange 21 is tightly pressed against the front end of the composite material cylinder 3; the rear locking bolts 37 are pressed against the rear flange 35, and the rear flange 35 is pushed forward, so that the rear flange 35 is tightly pressed against the rear end of the composite material cylinder 3; the front flange 21 and the rear flange 35 are axially sealed on the front and rear end surfaces of the composite material cylinder 3; in this process, a torque wrench is required to perform a torque test to ensure that the force on the fitting surface is uniform, so as to ensure a good sealing effect, and the installation is completed; The seventh step is to inject water into the water injection port of the front flange 21 to start the water pressure test.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A water pressure test device for a composite material cylinder, characterized in that: The invention comprises a fixed support (1), a horizontal inner cylinder (2) is fixedly arranged on the fixed support (1), a composite material cylinder (3) is sleeved on the outer side of the inner cylinder (2), a rear side sealing component (4) is arranged between the rear end of the inner cylinder (2) and the rear end of the composite material cylinder (3), a front side sealing component (5) is arranged between the front end of the inner cylinder (2) and the front end of the composite material cylinder (3), a guide rail (6) is arranged below the inner cylinder (2), a plurality of walking trolleys (7) and a rear end supporting trolley (8) are slidably arranged on the guide rail (6), the composite material cylinder (3) is supported by the walking trolley (7), and the rear side sealing component (4) is supported by the rear end supporting trolley (8).

2. A water pressure test device for a composite material cylinder according to claim 1, characterized in that: The fixed bracket (1) comprises an intermediate bracket (9) and two outer brackets (10); a fixing plate (11) is fixedly arranged on the rear side of the intermediate bracket (9); the outer brackets (10) are planar frame structures arranged in front and rear vertical planes; the front ends of the two outer brackets (10) are respectively fixedly connected to the left and right side edges of the rear side of the intermediate bracket (9).

3. A water pressure test device for a composite material cylinder according to claim 2, characterized in that: The front and rear ends of the inner cylinder (2) remain open; a mounting plate (12) is fixedly arranged outside the front end opening of the inner cylinder (2); a circle of first through holes and a circle of first threaded holes are arranged on the rear end surface of the mounting plate (12); a fixing flange (13) is fixedly arranged inside the rear end opening of the inner cylinder (2); a circle of second through holes is arranged on the fixing flange (13); a supporting plate (14) is fixedly arranged inside the fixing flange (13); a plug-in hole that passes through the center of the supporting plate (14); a circle of fixing threaded holes is arranged on the fixing plate (11); a circle of first through holes on the mounting plate (12) corresponds to a circle of fixing threaded holes on the fixing plate (11); a circle of first fixing bolts (15) pass through the first through holes and are screwed into the corresponding fixing threaded holes, thereby fixing the inner cylinder (2) to the fixing bracket (1).

4. A water pressure test device for a composite material cylinder according to claim 3, characterized in that: Two left-right symmetrical guide rails (6) are horizontally arranged on the ground along the front-rear direction; a travel wheel is arranged at the lower end of the travel trolley (7); two guide wheels are arranged at the left and right ends of the travel trolley (7), respectively, the guide wheels are in rolling contact with the inner side surface of the guide rail (6) on the same side; a liftable arc-shaped support seat (16) is arranged at the upper end of the travel trolley (7), and the support seat (16) is in contact with the lower end of the outer side surface of the composite material cylinder (3).

5. The water pressure testing device for a composite material cylinder according to claim 4, characterized in that: A running wheel is arranged at the lower end of the rear end supporting trolley (8), two guide wheels are arranged at the left and right ends of the rear end supporting trolley (8), and the guide wheels are in rolling contact with the inner side surface of the guide rail (6) on the same side. A fixing seat (17) is fixedly arranged at the upper end surface of the rear end supporting trolley (8), a mechanical jack (18) is fixedly arranged at the upper end of the fixing seat (17), a sleeve (19) is fixedly arranged at the upper end of the action rod of the mechanical jack (18), and a front-to-rear horizontal adjustment rod (20) is fixedly inserted inside the sleeve (19), and the front end of the adjustment rod (20) is inserted into the insertion hole of the support plate (14).

6. The water pressure testing device for a composite material cylinder according to claim 3, characterized in that: The front side sealing assembly (5) comprises a front flange (21), a front sealing cover (22), a front side locking bolt (23), and a gasket (24); the front flange (21) comprises a first cylinder (25) and a first ring (26), the first ring (26) being fixedly arranged on the outer side of the rear end opening of the first cylinder (25); a circle of second threaded holes (27) is arranged at the rear end surface of the first ring (26); a circle of first annular clamping grooves (28) are arranged at the inner edge of the rear end surface of the first ring (26), and a circle of axial sealing grooves (29) are arranged at the bottom annular surface of the first clamping grooves (28); the front sealing cover (22) comprises a second cylinder (30) and a second ring (26); A ring (31), wherein the second ring (31) is fixedly arranged at the front end opening of the second cylinder (30); a second annular clamping groove (34) is arranged at the outer edge of the rear end surface of the second cylinder (30); two parallel radial sealing grooves (32) are arranged on the inner cylindrical surface of the second clamping groove (34); a circle of axial sealing grooves (29) is arranged on the rear end surface of the second ring (31), and a circle of third through holes (33) is fixedly arranged on the second ring (31); a circle of gaskets (24) is fixedly arranged at the rear end surface of the second ring (31) of the front sealing cover (22); and sealing rings are arranged inside the axial sealing groove (29) and the radial sealing groove (32).

7. The water pressure testing device for a composite material cylinder according to claim 6, characterized in that: The front sealing cover (22) is sleeved on the outer side of the front end opening of the inner cylinder (2), and the front end surface of the second ring (31) of the front sealing cover (22) contacts the rear end surface of the mounting plate (12), a circle of third through holes (33) on the second ring (31) corresponds to a circle of first threaded holes on the mounting plate (12) one by one, and the second fixing bolts pass through the third through holes (33) and are screwed to the corresponding first threaded holes; the front end opening of the first cylinder (25) of the front flange (21) is sleeved on the second clamping groove (34) at the rear end of the second cylinder (30) of the front sealing cover (22), and the front end surface of the first cylinder (25) contacts the second threaded holes. The bottom annular surface of the clamping groove (34) is in contact with each other, and the front outer side surface of the first cylinder (25) is in contact with the inner cylindrical surface of the second clamping groove (34); a circle of second threaded holes (27) on the first annular ring (26) of the front flange (21) corresponds to a circle of pads (24) one by one, and a circle of front locking bolts (23) is screwed into the inside of the second threaded holes (27) and contacts the rear end surface of the corresponding pads (24); the front end of the composite material cylinder (3) is inserted into the inside of the first clamping groove (28) of the front flange (21), and the front end surface of the composite material cylinder (3) contacts the bottom annular surface of the first clamping groove (28).

8. The water pressure testing device for a composite material cylinder according to claim 3, characterized in that: The rear sealing assembly (4) comprises a rear flange (35), a rear sealing cover (36), and a rear locking bolt (37); the rear flange (35) comprises a third ring (38) and a third cylinder (39); the third ring (38) is fixedly arranged outside the front end opening of the third cylinder (39); a third annular clamping groove (40) is arranged at the inner edge of the front end surface of the third ring (38), and a circle of axial sealing grooves (29) is arranged at the bottom annular surface of the third clamping groove (40); the rear sealing cover (36) comprises a fourth ring (41), a fourth cylinder (42), a fifth cylinder (43) The fourth cylinder (42) is located outside the fifth cylinder (43); the rear end of the fourth cylinder (42) is fixedly arranged at the middle of the front end surface of the fourth ring (41); the rear end of the fifth cylinder (43) is fixedly arranged at the inner edge of the front end surface of the fourth ring (41); the outer side surface of the fifth cylinder (43) is a conical structure with a thin front and a thick rear; two circles of parallel radial sealing grooves (32) are arranged on the outer cylindrical surface of the fourth cylinder (42); a circle of third threaded holes (44) is arranged at the outer edge of the fourth ring (41); and a circle of fourth through holes (45) is arranged at the inner edge of the fourth ring (41).

9. The water pressure testing device for a composite material cylinder according to claim 8, characterized in that: The rear end opening of the composite material cylinder (3) is inserted into the third clamping groove (40) of the rear flange (35), and the rear end surface of the composite material cylinder (3) contacts the bottom annular surface of the third clamping groove (40); the fourth cylinder (42) of the rear sealing cover (36) is sleeved on the outside of the third cylinder (39) of the rear flange (35), the rear end surface of the third cylinder (39) contacts the front end surface of the fourth annular ring (41), and the inner cylindrical surface of the third cylinder (39) contacts the outer cylindrical surface of the fourth cylinder (42); a circle of third threaded holes (44) on the fourth annular ring (41) are respectively screwed with a rear locking bolt (37) inside, and the end of the rear locking bolt (37) contacts the rear end surface of the third annular ring (38) of the rear flange (35); The fixed flange (13) at the rear end of the inner cylinder (2) is sleeved on the outer side of the fifth cylinder (43) of the rear sealing cover (36), and the rear end surface of the fixed flange (13) contacts the front end surface of the fourth ring (41) of the rear sealing cover (36); a circle of axial sealing grooves (29) is provided on the rear end surface of the fixed flange (13); sealing rings are provided inside the axial sealing grooves (29) and the radial sealing grooves (32); a circle of second through holes on the fixed flange (13) corresponds to a circle of fourth through holes (45) on the fourth ring (41) one by one, and a circle of third fixing bolts (46) pass through the corresponding second through holes and fourth through holes (45) in sequence and are screwed with fixing nuts, thereby fixing the rear sealing cover (36) to the inner end of the inner cylinder (2).

10. The water pressure testing device for a composite material cylinder according to claim 6, characterized in that: An openable and closable water inlet is provided on the side wall of the first cylinder (25) of the front flange (21).

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