CN117723411A - Shell bearing test tool and method - Google Patents

Abstract

The invention discloses a shell bearing test tool and a shell bearing test method, and belongs to the technical field of bearing tests. The docking mechanism includes a support member provided with a receiving groove to receive the housing, and a top sealing member. The top sealing member abuts the annular top plate. The pressure supply mechanism is provided with a pressure supply pipeline and a pressure supply source which are communicated with the sealed space. The measurement and control mechanism comprises a pressure sensor, and the pressure sensor is communicated with the pressure supply pipeline. A pressure test method is also disclosed. The invention provides a shell bearing test tool and a shell bearing test method, which can adapt to the structural characteristics of a large-diameter irregular cylindrical shell, can be combined with the large-diameter cylindrical shell to construct a sealing space for detecting the bearing capacity, can also ensure the accurate detection of the bearing capacity of the large-diameter cylindrical shell, and obviously reduce the equipment cost and the time cost of the large-diameter cylindrical shell bearing test.

Description

Shell bearing test tool and method

Technical Field

The invention belongs to the technical field of pressure test, and particularly relates to a shell pressure test tool and a shell pressure test method.

Background

Cylindrical housing structures move widely in mechanical devices of different technical fields. In general cylindrical housing structures, in particular for equipment such as large hydraulic units, aircraft housings or deep water craft housings, it is not only necessary to have a certain bearing capacity, but also often it is necessary to construct a specific cylindrical housing structure adapted to the different equipment, which is subjected to a large internal or external pressure during actual use. Also, in order to facilitate accurate installation of components and equipment on the cylindrical housing, it is generally necessary to secure a cylindrical housing structure having a large size to accommodate structural components provided on the cylindrical housing. While a cylindrical housing having an irregular shape structure is often required for mounting the different components. Meanwhile, in order to ensure the bearing performance of the cylindrical shell structure, after the cylindrical shell structure is manufactured, a bearing test is generally required to be performed on the cylindrical shell structure to detect whether the cylindrical shell structure meets the influence of the bearing requirement of the cylindrical shell.

In the prior art, for the bearing test of the cylindrical shell structure, the structure between the cylindrical shell and the bearing test tool is generally required to form a sealed space, and the bearing performance of the cylindrical shell structure is judged by detecting the continuous pressurization of the sealed space. For the large-diameter irregular cylindrical shell structure, the large-diameter irregular cylindrical shell structure has the characteristics of larger size and irregular part of structure shape, and the pressure-bearing test equipment in the prior art cannot accurately and effectively seal the large-diameter irregular cylindrical shell member, so that the accurate test on the pressure-bearing performance of the large-diameter irregular cylindrical shell member cannot be accurately realized.

Disclosure of Invention

Aiming at one or more of the defects or improvement requirements of the prior art, the invention provides a shell bearing test tool and a shell bearing test method, which can adapt to the structural characteristics of a large-diameter irregular cylindrical shell, can be combined with the large-diameter cylindrical shell to construct a sealing space for detecting the bearing capacity, can also ensure the accurate detection of the bearing capacity of the large-diameter cylindrical shell, and obviously reduce the equipment cost and the time cost of the large-diameter cylindrical shell bearing test.

In order to achieve the above purpose, the invention provides a shell bearing test tool and a method, wherein a shell to be tested comprises an annular side wall and an annular top plate arranged on the top end surface of the annular side wall, and at least one mounting hole is formed in the annular top plate; the pressure test tool comprises:

a docking mechanism comprising a support member and a top sealing member;

the supporting member comprises an annular containing groove, and the diameter of a first side wall surface of the containing groove, which deviates from the center of the annular circle, is the same as the diameter of the side wall surface of the shell to be tested; the diameter of the second side wall surface of the accommodating groove facing the annular center of the circle is the same as the diameter of the inner ring of the annular top plate;

the top sealing member is abutted against the top end surface of the annular top plate and used for covering each mounting hole and supporting the annular top plate so as to form a sealing space between the accommodating groove and the shell to be tested;

the pressure supply mechanism is provided with a pressure supply source and a pressure supply pipeline communicated with the sealed space, and the pressure supply source is communicated with the pressure supply pipeline;

the measurement and control mechanism comprises at least one pressure sensor, and the pressure sensor is communicated with the pressure supply pipeline or the sealing space.

As a further preferred aspect of the invention, at least one first sealing element is provided on the first side wall for sealing a joint between the first side wall and the side wall of the housing to be tested.

As a further preferred aspect of the present invention, the first seal assembly includes a first seal groove provided on the first inner sidewall, and a first seal ring is provided in the first seal groove.

As a further preferred aspect of the present invention, the support member includes an inner annular wall, an outer annular wall, and a bottom annular plate, the inner annular wall and the outer annular wall being coaxially disposed, the bottom annular plate being disposed between the inner annular wall and the outer annular wall; and the height of the inner annular wall in the axial direction is larger than that of the outer annular wall in the axial direction.

As a further preferred aspect of the present invention, at least one transfer bracket is provided on the second side wall surface, and a top end surface of the transfer bracket abuts against the annular top plate.

As a further preferred aspect of the present invention, the top sealing member includes an auxiliary housing having a ring shape, an annular boss is provided on a bottom end surface of the auxiliary housing, and correspondingly, an annular angular groove is provided on an inner annular wall of the supporting member, and the annular boss is embedded in the annular angular groove for sealing an inner annular side wall surface of the annular top plate.

As a further preferred aspect of the present invention, at least one second sealing assembly is provided between the annular boss and the annular angular groove; at least one third sealing assembly is arranged between the annular boss and the annular top plate.

As a further preferred aspect of the present invention, the top sealing member further includes a cover plate having an annular shape, the cover plate and the auxiliary housing being concentric with each other, and the cover plate being provided on a top end surface of the annular top plate for blocking each of the mounting holes.

As a further preferable mode of the invention, a D03 sealant layer is arranged between the cover plate and the top end face of the annular top plate.

Further, a method for testing bearing of a shell is also disclosed, the tool for testing bearing of the shell is adopted, and the method for testing bearing comprises the following steps:

determining the test pressure and test time of the shell to be tested;

mounting the housing to be tested in the receiving groove of the supporting member;

covering the top sealing member on the top end surface of the shell to be tested;

the pressure supply source continuously inputs pressure medium into the sealed space through the pressure supply pipeline until the pressure in the sealed space reaches the test pressure;

the pressure sensor acquires the detection pressure of the pressure supply pipeline or the sealed space in real time and outputs the detection pressure in real time;

and (3) maintaining the test pressure until the test time is met, discharging the pressure medium in the sealed space, and ending the test.

In general, the above technical solutions conceived by the present invention have the beneficial effects compared with the prior art including:

(1) The invention discloses a shell bearing test tool which comprises a butt joint mechanism, a pressure supply mechanism and a measurement and control mechanism. The docking mechanism includes a support member provided with a receiving groove to receive the housing, and a top sealing member. The top sealing member abuts the annular top plate. The pressure supply mechanism is provided with a pressure supply pipeline and a pressure supply source which are communicated with the sealed space. The measurement and control mechanism comprises a pressure sensor, and the pressure sensor is communicated with the pressure supply pipeline. The pressure-bearing tool can adapt to the structural characteristics of the large-diameter irregular cylindrical shell, can be combined with the large-diameter cylindrical shell to construct a sealing space for detecting the pressure-bearing capacity, can also ensure accurate detection of the pressure-bearing capacity of the large-diameter cylindrical shell, and remarkably reduces the equipment cost and the time cost of the large-diameter cylindrical shell pressure-bearing test.

(2) According to the shell bearing test tool, the plurality of switching supports extending along the radial direction are arranged on the second side wall surface, so that the annular top plate with a large size can be stably supported by the switching supports when being mounted on the top end surface of the supporting member. And combine the D03 sealant layer that sets up between switching support and annular roof, further promote the stability of connecting between this annular roof and the switching support, avoid annular roof to produce deformation in the pressure-bearing test process, provide reliable guarantee for the steady operation of pressure-bearing test.

(3) The shell bearing test tool and the shell bearing test method are simple in structure, convenient and fast to use and accurate in test, and the bottom and the inner side of the shell to be tested are sealed by arranging the support member with the annular accommodating groove corresponding to the large-diameter cylindrical shell. And combine the roof sealing member who sets up on supporting member terminal surface for the roof sealing member not only can accomplish the stable shutoff to the mounting hole on the annular roof, can also strengthen the structural strength of whole annular roof, promotes the bearing capacity of annular roof, and then promotes the pressurization threshold value of this test frock, ensures that there is sufficient internal pressure in the sealed space to accomplish the bearing test to annular lateral wall, has further promoted the suitability of this bearing test frock. Simultaneously, combining at least one first sealing component arranged between a first side wall surface and an annular side wall, a second sealing component arranged between the annular side wall and an annular boss and a third sealing component arranged between the annular boss and an annular angle groove, triple sealing structures between a shell to be tested and a butt joint mechanism are realized, the air tightness of a sealing space is obviously improved, the accuracy of the pressure test tool is further guaranteed, and the pressure test tool has good popularization prospect and application value.

Drawings

FIG. 1 is a cross-sectional view of the whole structure of a shell bearing test fixture in an embodiment of the invention;

FIG. 2 is a flow chart of a method of testing bearing of a housing in an embodiment of the invention.

Like reference numerals denote like technical features throughout the drawings, in particular:

1. a housing to be tested; 11. an annular sidewall; 12. an annular top plate; 13. a mounting hole;

2. a support member; 21. an inner annular wall; 22. a bottom ring plate; 23. an outer annular wall; 24. a first sidewall surface; 25. a second sidewall surface; 26. a first seal ring; 27. a second seal ring; 28. a transfer bracket;

3. a top sealing member; 31. an auxiliary housing; 32. a cover plate; 33. a third seal ring;

4. a pressure supply mechanism; 41. a pressure supply pipe; 42. a sealing gasket; 43. an air intake duct; 44. an air inlet electromagnetic valve; 45. an exhaust duct; 46. an exhaust electromagnetic valve; 47. and a pressure supply source.

5. A measurement and control mechanism; 51 pressure sensor; 52. and a control box.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples:

referring to fig. 1 and 2, the shell bearing test tool and method in the preferred embodiment of the invention can adapt to the structural characteristics of a large-diameter irregular cylindrical shell, can be combined with the large-diameter cylindrical shell to construct a sealing space for detecting the bearing capacity, can also ensure accurate detection of the bearing capacity of the large-diameter cylindrical shell, and remarkably reduce the equipment cost and time cost of the large-diameter cylindrical shell bearing test.

Specifically, in the preferred embodiment of the present application, the housing 1 to be tested required for the pressure-bearing test fixture includes a large-diameter annular side wall 11 and a large-diameter annular top, and an annular top plate 12 is provided on the top end face of the annular side wall 11, thereby constituting the large-diameter housing 1 to be tested in a semi-open state, preferably, the annular side wall 11 has an outer diameter of 400mm. Meanwhile, at least one mounting hole 13 penetrating through the top end face and the bottom end face of the whole annular top plate 12 is formed in the annular top plate 12, so that corresponding other components can be arranged on the shell 1 to be tested through the mounting hole 13 in the actual use process of the shell 1 to be tested.

The pressure-bearing test tool comprises a butt joint mechanism, a pressure supply mechanism 4 and a measurement and control mechanism 5. The docking mechanism comprises a supporting member 2 and a top sealing member 3, wherein the supporting member 2 is used for supporting the shell 1 to be tested and sealing the bottom end surface and the inner side wall surface of the shell 1 to be tested, so that a sealing space between the shell 1 to be tested and the supporting member 2 is conveniently constructed. The support member 2 includes an annular accommodation groove for accommodating the housing 1 to be tested and sealing a part of the end face of the housing 1 to be tested. The diameter of the first side wall surface 24, deviating from the annular center of the circle, of the accommodating groove is the same as the diameter of the side wall surface of the to-be-tested shell 1, so that the to-be-tested shell 1 can be abutted against the first inner wall surface after being embedded into the accommodating groove, and then the stable sealing of the bottom end surface of the to-be-tested shell 1 is completed. Meanwhile, the diameter of the second side wall surface 25 of the accommodating groove facing the annular center is the same as the diameter of the inner ring of the annular top plate 12, so that the inner ring side wall surface of the annular top can be abutted against the second side wall surface 25, and a sealing space is formed between the shell 1 to be tested and the supporting member 2 preliminarily.

The top sealing member 3 is disposed on the top end face of the annular top plate 12, and the bottom end face of the top sealing member 3 abuts against the top end face of the annular top plate 12 and covers the respective mounting holes 13 provided on the annular top plate 12, further perfecting the sealing space between the housing 1 to be tested and the supporting member 2.

The pressure supply mechanism 4 comprises a pressure supply pipeline 41 and a pressure supply source 47, wherein one end of the pressure supply pipeline 41 is communicated with the sealing space, and the other end of the pressure supply pipeline is communicated with the pressure supply source 47, so that the pressure supply source 47 can control the pressure in the sealing space through the pressure supply pipeline 41, and the pressure test of the shell 1 to be tested is realized.

The measurement and control mechanism 5 comprises at least one pressure sensor 51, and the pressure sensor 51 is communicated with the pressure supply pipeline 41 or the sealing space and is used for collecting the pressure in the sealing space in real time so that a tester can judge the pressure-bearing test state of the shell 1 to be tested through the change of the pressure.

Further, in the preferred embodiment of the present application, at least one first seal assembly is provided on the first side wall surface 24, and preferably, two first seal assemblies are provided at intervals on the first side wall surface 24 along the axial direction in which the annular side wall 11 extends. In the actual use process, the annular side wall 11 is embedded into the accommodating groove, so that the outer wall surface of the annular side wall 11 is abutted against the first side wall surface 24 and simultaneously presses each first sealing assembly, and then the detachable stable sealing between the annular side wall 11 and the first side wall surface 24 is realized, the sealing medium in the sealing space is ensured not to leak from between the annular side wall 11 and the first side wall surface 24 in the pressure bearing test process, and the accuracy of the pressure bearing test of the shell 1 to be tested is ensured.

Further preferably, in the preferred embodiment of the present application, the first seal assembly includes a first seal groove and a first seal ring 26. The first sealing groove is formed on the first side wall surface 24 along the ring shape, and correspondingly, a first sealing ring 26 is arranged in the first sealing groove, so that a stable sealing structure is formed between the first side wall surface 24 and the ring-shaped side wall 11, and the air tightness of the sealing space is ensured. Preferably, the first seal 26 is an O-ring seal.

In more detail, as shown in fig. 1, in the preferred embodiment of the present application, the support member 2 has an annular structure on which an annular receiving groove is opened, and the support member 2 has an inner annular wall 21, a bottom annular plate 22 and an outer annular wall 23 in this order from the center in the radial direction. The inner annular wall 21 and the outer annular wall 23 are coaxially disposed, and a bottom annular plate 22 is disposed between the inner annular wall 21 and the outer annular wall 23, so that an accommodation groove having an annular structure is formed on the top end surface of the support member 2,

further, as shown in fig. 1, in the preferred embodiment of the present application, the bottom of the annular sidewall 11 is provided with a reduced section to facilitate the installation of the housing 1 to be tested. In the pressure-bearing test process, the necking section is directly clamped in the accommodating groove, namely the side wall surface at the position of the necking section is abutted against the first side wall surface 24, and correspondingly, the top end surface of the outer annular wall 23 is also abutted against the bevel surface of the necking section. Preferably, the height of the inner annular wall 21 in the axial direction is smaller than the height of the outer annular wall 23 in the axial direction, i.e. the height of the first side wall surface 24 is smaller than the height of the second side wall surface 25, so that the housing to be tested can be accurately fastened in the accommodating groove.

Further preferably, in the preferred embodiment of the present application, at least one adapting support 28 is disposed on the second side wall surface 25, and the top end surface of the adapting support 28 abuts against the bottom end surface of the annular top plate 12, so as to provide a certain bottom support for the bottom of the large-diameter annular top plate 12, avoid deformation of the annular top plate 12, and further improve accuracy of the pressure test device. Preferably, a plurality of stabilizing support systems are provided on the second sidewall surface 25 at uniform intervals along the annular shape for constructing a stable support system suitable for the annular top plate 12. It is further preferred that three, four, five or six adapter brackets 28 are uniformly provided on the second side wall surface 25 along the ring shape.

More specifically, in the preferred embodiment of the present application, the adapter bracket 28 includes a radially extending horizontal strut and an axially extending vertical strut. At least one stud assembly is arranged between the side wall surface of the vertical strut and the second side wall surface 25, so that the vertical strut is stably fixed on the second side wall surface 25. Preferably, D03 sealant is applied to each of the threaded assemblies as they fixedly mount the vertical strut to the second sidewall surface 25. One end of the horizontal strut is fixed on the vertical strut, the other end of the horizontal strut extends along the radial direction, meanwhile, the top end face of the horizontal strut is abutted against the annular top plate 12, and a D03 sealant layer is arranged between the top end face of the horizontal strut and the annular top plate 12, so that the horizontal strut can be ensured to stably support the annular top plate 12. It is further preferred that at least one angled strut or wedge support plate be provided between the horizontal strut and the vertical strut for increasing the structural strength of the overall adapter bracket 28.

Of course, the adaptor bracket 28 is not limited to the above-mentioned structure, and in another preferred embodiment of the present application, the adaptor bracket 28 is an annular sleeve as a whole, and an annular support plate is disposed on the top end surface of the annular sleeve. In the actual use process, the annular sleeve is sleeved on the second side wall surface 25, and correspondingly, the top end surface of the annular supporting plate is abutted against the bottom end surface of the annular top plate 12, so that stable support of the annular top plate 12 is realized.

Further, as shown in fig. 1, the annular top plate 12 is depressed along the axis near the inner ring position to form a depressed groove, and each mounting hole 13 is provided in a region of the annular top plate 12 near the outer side, i.e., a region where no depressed groove is provided, and during actual use of the housing 1 to be tested, the annular top plate 12 can be mounted with other components correspondingly, and therefore, only the annular side wall 11 is normally subjected to a large pressure. Further, in the pressure test, it is necessary to ensure that the annular top plate 12 is not damaged and to raise the experimental pressure of the pressure test as much as possible.

In order to achieve a sealing of the top area of the annular top plate 12 while at the same time increasing the pressure-bearing capacity of the annular top plate 12, in the preferred embodiment of the present application the top sealing member 3 comprises an auxiliary housing 31 in the form of a ring, an annular boss being provided on the bottom end surface of the auxiliary housing 31, and correspondingly a corresponding annular angular groove being provided on the inner annular wall 21 of the support member 2. In the actual use process, the shell 1 to be tested is embedded into the accommodating groove, correspondingly, the annular top plate 12 is fixed on the adapter bracket 28, and then the annular boss is embedded into the annular angle groove, so that the sealing of the inner annular side wall surface of the annular top plate 12 is realized; accordingly, the bottom end surface of the auxiliary housing 31 can accurately cover the bottom end surface of the depressed groove so as to enhance the bearing capacity of the annular top plate 12, so that sufficient pressure can be applied to the annular side wall 11 during the bearing test, and damage to the annular top plate 12 due to excessive pressure can be avoided.

Further preferably, in the preferred embodiment of the present application, at least one second sealing component is disposed between the annular boss and the annular angular groove, and correspondingly, at least one third sealing component is disposed between the annular boss and the annular top plate 12, so as to further complete stable sealing of contact gaps between the annular boss and the annular angular groove and between the annular top plate 12, and further remarkably improve the air tightness of the sealing space, and further ensure the test accuracy of the pressure test. Preferably, the second sealing assembly comprises a second sealing groove which is arranged on the side wall surface of the annular boss and the annular angle groove in an opposite mode, and a second sealing ring 27 which is correspondingly arranged in the second sealing groove. The third seal assembly includes a third seal groove disposed on the annular boss and a third seal ring 33 disposed in the third seal groove. It is further preferred that the second seal ring 27 and the third seal ring 33 are both O-ring seals.

More specifically, in the preferred embodiment of the present application, a D03 sealant layer is provided between the bottom end face of the auxiliary housing 31 and the top end face of the annular top plate 12 for stably fixing the annular top plate 12 to the auxiliary housing 31, ensuring that the auxiliary housing 31 can achieve stable support of the annular top plate 12.

Further, in the preferred embodiment of the present application, the top sealing member 3 further includes a cover plate 32, the cover plate 32 is in an annular structure and shares a central axis with the auxiliary housing 31, and the cover plate 32 is disposed on the top end surface of the annular top plate 12, so that each mounting hole 13 on the annular top plate 12 can be plugged while the top end surface of the annular top plate 12 except for the sinking groove is covered, the air tightness of the sealing space is further improved, and the experimental accuracy of the bearing test is ensured.

Still preferably, in the preferred embodiment of the present application, a portion of the bottom end surface of the cover plate 32 abuts against the top end surface of the auxiliary housing 31, and the cover plate 32 is fixedly connected with the top end surface of the auxiliary housing 31, so that the cover plate 32 can stably transfer the pressure borne by the annular top plate 12 to the auxiliary housing 31 in the pressure bearing test process, the pressure bearing capacity of the annular top plate 12 is significantly improved, the structural integrity of the annular top plate 12 in the pressure bearing test is further ensured, the pressure bearing performance of the annular side wall 11 can be tested by adopting larger pressure, and the applicability of the pressure bearing test tool is significantly improved.

In more detail, in the preferred embodiment of the present application, a D03 sealant layer is provided between the cover plate 32 and the auxiliary housing 31 in order to stably fix the auxiliary housing 31 and the cover plate 32 as one body. Further preferably, a D03 sealant layer is also provided between the annular top plate 12 and the cover plate 32, thereby stably fixing the cover plate 32 and the auxiliary housing 31.

Further, in the preferred embodiment of the present application, a pressure supply through hole is provided in the inner annular wall 21, and accordingly, an end of the pressure supply pipe 41 facing away from the pressure supply source 47 is embedded into the pressure supply through hole to communicate with the sealed space for introducing or discharging the pressure medium in the pressure supply source 47 into or from the sealed space. Preferably, a gasket 42 is provided between the pressure supply pipe 41 and the pressure supply through hole, so that the pressure medium is prevented from flowing out from the gap between the pressure supply pipe 41 and the pressure supply through hole, and the air tightness of the whole sealing space is further improved.

Further preferably, in the preferred embodiment of the present application, the end of the pressure supply pipe 41 facing away from the sealed space is communicated with an air inlet pipe 43 and an air outlet pipe 45, preferably, an air inlet solenoid valve 44 is provided on the air inlet pipe 43, and an air outlet solenoid valve 46 is provided on the air outlet pipe 45, meanwhile, the pressure supply source 47 is an air source, and the air source is communicated with the air inlet pipe 43, so that the air inlet pipe 43 can provide stable high-pressure air for the sealed space.

In more detail, in the preferred embodiment of the present application, in order to avoid the influence of the pressure sensors 51 on the airtight property of the sealed space, each pressure sensor 51 is provided on the pressure supply pipe 41 for detecting the air pressure in the pressure supply pipe 41 communicating with the sealed space in real time.

Further, in the preferred embodiment of the present application, the measurement and control mechanism 5 further includes a control box 52, and the control box 52 is simultaneously in communication with each of the pressure sensors 51, the air inlet solenoid valve 44 and the air outlet solenoid valve 46, so as to accurately control the operation of the test fixture through the control box 52.

Further preferably, in the preferred embodiment of the present application, the control box 52 includes a signal collector, a PLC controller, a liquid crystal display screen, and a memory. In the actual use process, the pressure value of the sealing space, which is acquired in real time by the pressure sensor 51, is acquired by the signal acquisition device, and then the switch of the electromagnetic valve is accurately controlled by the PLC according to the pressure value of the sealing space, so that the stable operation of the pressure-bearing test is ensured. Meanwhile, the PLC calculates the pressure-bearing state of the shell 1 to be tested according to the related data of the pressure sensor 51, and accurately displays corresponding data and results on the liquid crystal display screen. Accordingly, the relevant data of the pressure sensor 51 and the calculation result are stored in the memory.

Further, as shown in fig. 2, in another preferred embodiment of the present application, a pressure test method applicable to a large-diameter cylindrical shell is also disclosed, the pressure test method adopts the pressure test tool described above, specifically, the pressure test method includes the following steps:

the test pressure and test time of the housing 1 to be tested are determined.

The housing 1 to be tested is mounted in the receiving groove of the support member 2.

A top sealing member 3 is provided to cover the top end face of the housing 1 to be tested.

The pressure supply source 47 continuously supplies pressure medium to the sealed space through the pressure supply pipe 41 until the pressure in the sealed space reaches the test pressure.

The pressure sensor 51 collects the detected pressure of the pressure supply pipe 41 or the sealed space in real time and outputs the detected pressure in real time.

And (5) maintaining the test pressure until the test time is met, discharging the pressure medium in the sealed space, and ending the test.

The shell bearing test tool and the shell bearing test method are simple in structure, convenient and fast to use and accurate in test, and the bottom and the inner side of the shell 1 to be tested are sealed by arranging the support member 2 with the annular accommodating groove corresponding to the large-diameter cylindrical shell. And combine the roof sealing member who sets up on supporting member 2 terminal surface for the roof sealing member 3 not only can accomplish the stable shutoff to mounting hole 13 on the annular roof 12, can also strengthen the structural strength of whole annular roof 12, promotes the bearing capacity of annular roof 12, and then promotes the pressurization threshold value of this test frock, ensures that there is sufficient internal pressure in the sealed space to accomplish the bearing test to annular lateral wall 11, has further promoted the suitability of this bearing test frock. Simultaneously, combining at least one first sealing component arranged between the first side wall surface 24 and the annular side wall 11, a second sealing component arranged between the annular side wall 11 and the annular boss and a third sealing component arranged between the annular boss and the annular corner groove, triple sealing structures between the shell to be tested and the abutting mechanism are realized, the air tightness of a sealing space is obviously improved, the accuracy of the bearing test tool is further ensured, and the bearing test tool has good popularization prospect and application value.

It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The shell to be tested comprises an annular side wall and an annular top plate arranged on the top end surface of the annular side wall, wherein at least one mounting hole is formed in the annular top plate; the pressure-bearing test fixture is characterized by comprising:

a docking mechanism comprising a support member and a top sealing member;

the supporting member comprises an annular containing groove, and the diameter of a first side wall surface of the containing groove, which deviates from the center of the annular circle, is the same as the diameter of the side wall surface of the shell to be tested; the diameter of the second side wall surface of the accommodating groove facing the annular center of the circle is the same as the diameter of the inner ring of the annular top plate;

the top sealing member is abutted against the top end surface of the annular top plate and used for covering each mounting hole and supporting the annular top plate so as to form a sealing space between the accommodating groove and the shell to be tested;

the pressure supply mechanism is provided with a pressure supply source and a pressure supply pipeline communicated with the sealed space, and the pressure supply source is communicated with the pressure supply pipeline;

the measurement and control mechanism comprises at least one pressure sensor, and the pressure sensor is communicated with the pressure supply pipeline or the sealing space.

2. The housing pressure test fixture of claim 1, wherein the first sidewall surface is provided with at least one first sealing assembly for sealing a seam between the first sidewall surface and the sidewall surface of the housing to be tested.

3. The housing pressure test fixture of claim 2, wherein the first seal assembly includes a first seal groove disposed on the first inner sidewall, a first seal ring disposed in the first seal groove.

4. The housing pressure test fixture according to any one of claims 1-3, wherein the support member comprises an inner annular wall, an outer annular wall and a bottom annular plate, the inner annular wall and the outer annular wall being coaxially arranged, the bottom annular plate being arranged between the inner annular wall and the outer annular wall; and the height of the inner annular wall in the axial direction is larger than that of the outer annular wall in the axial direction.

5. The housing pressure test fixture of claim 4, wherein at least one adapter bracket is arranged on the second side wall surface, and a top end surface of the adapter bracket abuts against the annular top plate.

6. The housing pressure test fixture of claim 5, wherein the top sealing member comprises an auxiliary housing in a ring shape, an annular boss is arranged on a bottom end surface of the auxiliary housing, correspondingly, an annular angular groove is arranged on an inner annular wall of the supporting member, and the annular boss is embedded into the annular angular groove for sealing an inner annular side wall surface of the annular top plate.

7. The housing pressure test fixture of claim 6, wherein at least one second seal assembly is disposed between the annular boss and the annular angular groove; at least one third sealing assembly is arranged between the annular boss and the annular top plate.

8. A housing pressure test fixture as claimed in claim 6 or 7 wherein the top sealing member further comprises a cover plate in the shape of a ring, the cover plate and the auxiliary housing sharing a central axis, and the cover plate being disposed on a top end face of the annular top plate for sealing each of the mounting holes.

9. The housing pressure test fixture of claim 8, wherein a D03 sealant layer is disposed between the cover plate and the annular top plate top end surface.

10. A housing pressure test method, characterized in that the housing pressure test tool according to any one of claims 1 to 9 is adopted, and the pressure test method comprises the following steps:

determining the test pressure and test time of the shell to be tested;

mounting the housing to be tested in the receiving groove of the supporting member;

covering the top sealing member on the top end surface of the shell to be tested;

the pressure supply source continuously inputs pressure medium into the sealed space through the pressure supply pipeline until the pressure in the sealed space reaches the test pressure;

the pressure sensor acquires the detection pressure of the pressure supply pipeline or the sealed space in real time and outputs the detection pressure in real time;

and (3) maintaining the test pressure until the test time is met, discharging the pressure medium in the sealed space, and ending the test.