CN109855980B - Hydrostatic testing machine for ultra-large-diameter cast pipe fitting - Google Patents
Hydrostatic testing machine for ultra-large-diameter cast pipe fitting Download PDFInfo
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- CN109855980B CN109855980B CN201910233940.8A CN201910233940A CN109855980B CN 109855980 B CN109855980 B CN 109855980B CN 201910233940 A CN201910233940 A CN 201910233940A CN 109855980 B CN109855980 B CN 109855980B
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- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 41
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- 239000000872 buffer Substances 0.000 claims description 22
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- 239000002131 composite material Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
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Abstract
The invention relates to the technical field of hydrostatic test devices of cast pipe fittings, in particular to hydrostatic test equipment of an oversized-diameter cast pipe fitting, and particularly relates to hydrostatic test devices of pipe fittings with different structural forms and diameters of DN 1600-2200. The method comprises the following steps: mounting a supporting frame, a main cylinder, a side cylinder driving mechanism, a moving trolley and a tool; the mounting support frame is of a rectangular frame structure; the main cylinder is arranged at the middle position of the upper part of the mounting support frame; the side cylinder is arranged on the side cylinder driving mechanism; the side cylinder driving mechanism can move along the upright post under the driving of the lifting cylinder; the mobile trolley is arranged at the lower part of the mounting support frame; the three-way pipe fitting is arranged on the travelling bogie and moves to the center of the installation support frame, the upper port of the three-way pipe fitting is plugged by a tool on the main cylinder, the middle port is plugged by a tool on the left side (or right side) of the side cylinder, the other side cylinder provides supporting force balance, and the lower port is plugged by a tool on the travelling bogie.
Description
Technical Field
The invention relates to the technical field of hydrostatic test devices of cast pipe fittings, in particular to hydrostatic test equipment of an oversized-diameter cast pipe fitting, and particularly relates to hydrostatic test devices of pipe fittings with different structural forms and diameters of DN 1600-2200.
Background
The existing hydrostatic test machine can finish the cast pipe fitting pressing test with a specific drift diameter specification (DN drift diameter is less than 1600 mm). However, the frame of the elbow type hydrostatic testing machine is a triangle inclined frame, the side cylinder is fixed in position and cannot move up and down along the frame, and the elbow type hydrostatic testing machine is only suitable for elbow hydrostatic tests with specific specifications and fixed angles; the frame of the machine body of the three-way hydrostatic testing machine of the other type is a vertical frame, and the side cylinder driving mechanism can move up and down along the upright post, but because the side cylinder does not have a rotating function, the side cylinder is only suitable for the direct-connection and three-way pipe fitting pressing test of specific specifications. When the diameter of the pipe fitting is increased to more than DN1600, under the condition that the internal water pressure of the pipe fitting is unchanged, according to the Pascal principle, P=p×s, the force generated by water pressure is increased, and in order to balance the water pressure, equipment is required to provide larger counter force to ensure the sealing effect in the water pressure test of the pipe fitting. The capacity of the pressurizing oil cylinder of the equipment, the system pressure and the integral rigidity of the machine body are required to be higher; the existing water pressure equipment is of an integral welding frame structure, when the drift diameter of the pipe fitting is more than 1600, the external dimension of the pipe fitting is oversized, the internal space of the equipment is required to be larger, the external dimension of the equipment is larger, the bearing capacity of the mobile trolley is larger, and the bearing capacity of the mobile trolley exceeds the containing capacity of the existing equipment. Taking a newly built DN1600-2200 hydraulic pressure testing machine as an example, in order to realize the hydraulic pressure test of all pipe fitting types within the diameter range, and simultaneously ensure the rigidity requirement of equipment, the external dimension of the equipment reaches 2200mmx 10000 mmx 12000mm, and the weight of the whole frame exceeds 120 tons. The adoption of the integral frame can lead to the super-wide and super-heavy part, cause a series of difficulties such as processing, hoisting, transporting, installing and the like, and even can not be transported to the site
Thus, existing hydrostatic testers exist: 1. the specification of the test pipe fitting is smaller, the drift diameter of the pressing pipe fitting is generally smaller than DN1600, the size of the equipment is smaller, the rigidity is lower, the oil cylinder capacity is smaller, and the hydraulic test of the pipe fitting with the ultra-large drift diameter (DN 1600-2200) cannot be realized; 2. the pipe fitting form that the testing machine detected is single, and straight pipe fitting and elbow pipe fitting need accomplish on different grade type equipment respectively, and area is big, consumes the resource more.
Aiming at the problems in the prior art, it is necessary to research and design a novel hydrostatic testing machine for ultra-large-diameter cast pipe fittings so as to overcome the problems in the prior art.
Disclosure of Invention
According to the hydraulic testing machine, the hydraulic testing of the pipe fitting with the ultra-large drift diameter cannot be completed, and the hydraulic testing machine for the pipe fitting with the ultra-large drift diameter does not have the technical problem of multiple functions. According to the invention, the lifting cylinder and the rotating cylinder are arranged on the upright post to change the position and the angle of the side cylinder, so that the purpose of meeting different types and specifications of pipe fittings is achieved, and meanwhile, the movable trolley is arranged on the base and used for bearing the pipe fitting with the ultra-large drift diameter to enter and exit the hydraulic test device for the hydraulic test.
The invention adopts the following technical means:
a hydrostatic testing machine for oversized drift diameter cast tubing comprising: mounting a supporting frame, a main cylinder, a side cylinder driving mechanism, a moving trolley and a tool; the mounting support frame is of a rectangular frame structure; the cylinder body of the main cylinder is arranged in the middle of the upper beam at the upper part of the mounting support frame, and the end part of a piston rod of the main cylinder is provided with a tool; the side cylinder is installed on the side cylinder driving mechanism through a trunnion, the side cylinder body is hinged with the head of a piston rod of a rotating cylinder installed at the top of the side cylinder driving mechanism, and the side cylinder body can rotate along the trunnion under the driving of the rotating cylinder. The side cylinder driving mechanism can move along the vertical direction of the upright post under the driving of the lifting cylinder arranged at the top of the inner cavity of the upright post, namely, the side cylinder can rotate and can move up and down. The end part of a piston rod of the side cylinder is provided with a tool; the movable trolley is arranged at the lower part of the mounting support frame and moves by the oil cylinder to walk along the guide rail; and when the three-way pipe fitting is placed on the movable trolley and moves to the center of the installation support frame, the upper port of the three-way pipe fitting is plugged by a tool on the main cylinder, the middle port is plugged by a tool on the left side (or right side) of the side cylinder, the other side cylinder provides supporting force balance, and the lower port is plugged by a tool on the movable trolley. .
Further, the mounting support frame is a rectangular frame structure composed of an upper beam, a base and upright posts symmetrically arranged on two sides of the upper beam and the base;
further, the upper beam is of a steel plate welding box structure, and the left end and the right end of the upper beam are respectively contacted with the processing surfaces on the inner sides of the upper parts of the two upright posts and are connected through at least one group of pull rods; the contact surface of the upper beam and the upright post is positioned by a vertical positioning key and a front positioning key and a rear positioning key and bears shearing force; reinforcing plates are arranged on the four corner brackets at the lower part of the upper beam, and support reaction force is provided during the hydrostatic test of the elbow pipe fitting;
further, the base is of a steel plate welding box structure, and the left end and the right end of the base are respectively contacted with the processing surfaces on the inner sides of the lower parts of the two upright posts and are connected through at least one group of pull rods; positioning is carried out on the contact surface of the base and the upright post through a vertical positioning key and a front positioning key and a rear positioning key, and shearing force is born; the middle of the base is provided with a trolley moving oil cylinder which is of a two-end hinged structure, the tail part of the trolley moving oil cylinder is hinged with the base, and the end part of a piston rod is hinged with the moving trolley; the movable trolley arranged on the guide rail moves in and out of the mounting support frame along the guide rail through the forward and backward movement of the piston rod; a base center convex surface is arranged on the base between the guide rails;
further, the upright post is of a steel plate welded box structure and is fixedly connected with the upper beam and the base through a pull rod, a vertical positioning key and a front positioning key and a rear positioning key respectively to form a closed frame structure; the inside of the upright post is of a cavity structure, and guide plates are arranged in the upright post and on the front, rear, left and right surfaces of the upright post to provide guidance for the up-and-down movement of the side cylinder driving mechanism;
further, the main cylinder is fixed on the bottom surface of the upper beam through a cylinder flange, and the head part of a piston rod is designed as a piston rod ball head; the ball head of the piston rod is fixed in the ball hinge seat through two semicircular pressing plates, and the ball hinge seat can rotate relatively to the ball head of the piston rod; the ball hinged support is connected with the tool through a bolt; the spherical hinge structure can prevent the piston rod from bearing lateral force, and the service life of the oil cylinder is prolonged.
Further, the side cylinder driving mechanism is installed in the inside of the upright post, including: a lifting cylinder, a rotating cylinder, and a side cylinder support frame;
further, the side cylinder support frame is of a combined structure and comprises a frame main body and a rear pressing plate; the frame main body and the rear pressing plate are provided with guide plates, and 6 guide surfaces are formed together to play a role in guiding; the upper part of the frame main body is provided with a lifting cylinder bearing seat and a rotating cylinder bearing seat, and the front part is provided with a side cylinder trunnion gland;
further, the lifting cylinder is a piston cylinder with two hinged ends, a reverse hanging installation mode is adopted, the tail part is hinged with a bracket at the top of the upright post, and the end part of a piston rod is hinged on a lifting cylinder bearing seat at the upper part of the side cylinder supporting frame; the side cylinder driving mechanism is driven by the lifting cylinder piston rod to slide up and down along the upright column guide surface;
further, the rotary cylinder is a cylinder body trunnion piston cylinder, the cylinder body trunnion is hinged on a rotary cylinder bearing seat at the upper part of the side cylinder supporting frame, and after the cylinder body passes through a square hole at the upper part of the side cylinder supporting frame, the end part of a piston rod is hinged with the side cylinder body; the side cylinder body is driven to rotate around the side cylinder trunnion through the rotating cylinder piston rod.
Further, the side cylinders are arranged in the side cylinder supporting frames, the trunnions on the two sides of the side cylinders are fixed through side cylinder trunnion covers and form a revolute pair, and the cylinder bodies of the side cylinders can rotate around the trunnions; the head of the piston rod of the side cylinder is designed as a ball head of the piston rod; the ball head of the piston rod is fixed in the ball hinge seat through two semicircular pressing plates, and the ball hinge seat can rotate relatively to the ball head of the piston rod; the ball hinged support is connected with the tool through a bolt; 6 groups of buffers are uniformly arranged at the end part of the piston rod, the buffers are fixed on a buffer support, and the buffer support is combined with the end part of the piston rod of the side cylinder through a bolt; the head of the buffer is contacted with the spherical hinge seat, and the extending distance and the buffer stroke of the buffer are adjusted, so that the tool and the piston rod of the side cylinder basically keep a vertical angle relation no matter the cylinder body of the side cylinder is in a horizontal state or an inclined state.
Further, the movable trolley is responsible for feeding the three-way pipe fitting and the tool auxiliary tool into or out of the hydrostatic testing machine; the travelling car includes: a trolley body, a compound spring and wheels; the trolley body is of a frame structure welded by square steel pipes, a plurality of composite springs are uniformly and symmetrically arranged on two longitudinal beams of the trolley body, and the use quantity of the composite springs can be adjusted according to the weight of an actual pipe fitting and a tool; the trolley bedplate is arranged on the composite spring and is used for placing the tool and the pipe fitting; wheels are arranged at the lower part of the trolley body and are arranged on the guide rail; the trolley body is hinged with a piston rod of the trolley moving oil cylinder; when the movable trolley is outside the equipment, the composite spring only bears the weight of the trolley platen, the tooling, the three-way pipe fitting and the like, and the composite spring is compressed and deformed but not compressed in place at the moment, a certain gap is reserved between the bottom surface of the trolley platen and the central convex surface of the base, so that the trolley can be ensured to smoothly move into the equipment; when the movable trolley is in the equipment, after the main cylinder presses on the three-way pipe fitting, the compound spring is further compressed and deformed under the action of pressure, so that the bottom surface of the trolley platen is contacted with the central convex surface of the base, and the working load is transferred to the base through the central convex surface of the base, so that the wheels of the trolley are prevented from being damaged due to huge load.
Further, the guide rail adopts a light rail, and the tail ends of the two ends of the guide rail are provided with mechanical baffles, so that the guide rail has a limited function.
The test method of the invention comprises the following steps:
1. for the hydrostatic test of the three-way pipe fitting, bell and spigot radial sealing tools in the upper direction, the lower direction and the right direction (left direction) are required to seal, corresponding tools are respectively installed on a main cylinder, cylinders on the left side and the right side and a trolley platen, after the mobile trolley bears the pressure test pipe fitting and moves into equipment, the main cylinder is made to move downwards and pressurized, and the upper opening and the lower opening of the pipe fitting are sealed and pressed through the tools. And then the center height of the side cylinder is adjusted through the lifting oil cylinder, so that the center of the right (left) side cylinder is aligned with the center of the middle hole of the three-way pipe fitting, then the side cylinder moves forwards and is pressurized, and the middle hole of the pipe fitting is sealed and pressed through the bell and spigot radial sealing tool. The right (left) side contacts with the pipe fitting through the corresponding tail stay tool, and plays a role in balancing the thrust of the right cylinder.
2. For the straight-through pipe fitting hydrostatic test, only tools and seals in the upper direction and the lower direction are needed. The height of the pipe fitting is adjusted through adjusting the square box tool, so that the hydraulic test requirements of all specifications of straight-through pipe fittings are met.
3. For elbow pipe fitting hydrostatic test, need the frock and the seal of controlling two directions, install corresponding frock on left side jar, right side jar respectively, install adjustment square chest and corresponding elbow support on the dolly platen, adjust elbow center height through adjustment square chest combination, adjust side jar inclination through rotatory hydro-cylinder, promote the top dead center and keep with side jar actuating mechanism through the lift cylinder, guarantee side jar braced frame and quench the support bottom surface of roof beam bottom surface and closely laminate above the board, then side jar moves forward and pressurizes, seal and compress tightly elbow pipe fitting two holes through bell and spigot radial seal frock. The sealing requirements of elbows with various specifications can be realized.
After the pipe fitting sealing work is finished, the three pipe fittings are filled with water through the low-pressure water pipeline, gas in the pipeline is discharged through the exhaust pipeline, and the water filling port and the exhaust port are both arranged on the tool. After the pipe fitting is exhausted, the ball valve is closed, and then the pipe fitting is pressurized by a high-pressure water pump, wherein the water pressure is mainly 1.6MPa, 2.5MPa, 3.5MPa and the like. The dwell time may be performed as per the batch process requirements.
Compared with the prior art, the invention has the following advantages:
compared with the traditional hydrostatic testing machine, the hydrostatic testing machine for the ultra-large-diameter cast pipe fitting provided by the invention has the advantages that the functions are more perfect, the bearing capacity is stronger, the hydrostatic testing machine is suitable for hydrostatic testing of the ultra-large-diameter pipe fitting with the diameter more than DN1600, the compression testing functions of the straight pipe fitting, the three-way pipe fitting and the elbow pipe fitting are integrated on one device, the universality is stronger, the occupied space is saved for users, and the resources such as water, electricity and the like are saved. The installation frame is of a split combined structure, and meets the requirements of processing, hoisting and transporting ultra-wide and ultra-heavy parts.
In order to simultaneously meet the hydraulic tests of various drift diameter specifications and various types of pipe fittings on one device and improve the adaptability of the device, three main oil cylinders are arranged on a supporting frame of the device, and the pipe orifices of the cast pipe fittings are plugged from the upper part and the two side parts respectively. The main cylinder stroke is set to be larger, so that the requirements of straight-through and three-way pipe fittings in a larger height range are met; the side cylinder can move up and down and rotate, the rotation angle can be adjusted randomly, and the requirements of elbow pipe fittings with different angle specifications are met.
In order to improve the bearing capacity of equipment, the invention sets the main cylinder and the side cylinder with larger capacity under the condition of unchanged pressure of the oil pressure system, thereby meeting the bearing requirement of higher water pressure counter force.
In order to place the casting pipe fittings with ultra-large diameter specifications and ultra-large sizes inside the equipment and improve the accommodating capacity of the equipment, the invention increases the frame size of the equipment, correspondingly improves the rigidity of the equipment and ensures that the frame of the equipment has smaller deformation during the hydrostatic test.
In order to solve the problems of ultra-wide and overweight of the integral frame, the invention adopts a split combined frame structure, the integral frame is split into three parts of an upper beam, an upright post and a base at a proper position, and split parts are pre-tightened and combined into an integral frame structure through structures of multi-group pull rod pre-tightening, multi-group positioning key positioning and the like, thereby effectively solving the problems of processing, hoisting, long-distance transportation and the like of the ultra-wide and overweight part.
In summary, the technical scheme of the invention solves the problems in the prior art: 1. the specification of the test pipe fitting is smaller, the size of the equipment is smaller, the rigidity is lower, the oil cylinder capacity is smaller, the drift diameter of the pressing pipe fitting is generally smaller than DN1600, and the hydraulic test of the pipe fitting with the ultra-large drift diameter (DN 1600-2200) cannot be realized; 2. the pipe fitting detected by the testing machine is single in form, the straight pipe fitting and the elbow pipe fitting are required to be finished on different equipment respectively, the occupied area is large, and the resource consumption is high; 3. the whole frame structure is easy to cause ultra-wide and overweight after being amplified, thereby causing the problems of processing, hoisting, transportation and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the assembly structure of the upper beam and the master cylinder of the present invention;
FIG. 3 is a schematic view of the structure of the column according to the present invention;
FIG. 4 is a schematic view of a base structure of the present invention;
FIG. 5 is a schematic view of the structure of the joint between the upper beam and the upright post according to the present invention;
FIG. 6 is a schematic diagram of the assembled structure of the side cylinder and side cylinder driving mechanism of the present invention;
FIG. 7 is a schematic view of a side cylinder support frame structure of the present invention;
FIG. 8 is a schematic diagram of the side cylinder assembly structure of the present invention;
FIG. 9 is a schematic view of the assembled structure of the base and the mobile cart of the present invention;
FIG. 10 is a schematic diagram of an assembly axis of a test elbow fitting according to the present invention;
FIG. 11 is a schematic diagram of an assembly of a test elbow fitting according to the present invention;
FIG. 12 is a schematic diagram of an assembly of a test tee according to the present invention.
In the figure: 1. the upper beam 2, the upright post 3, the base 4, the master cylinder 5, the side cylinder 6, the side cylinder driving mechanism 7, the traveling trolley 8, the tooling 9, the three-way pipe fitting 10, the bracket 11, the piston rod ball head 12, the pressing plate 13, the ball hinge seat 14, the guide plate 15, the guide rail 16, the trolley body 17, the compound spring 18, the wheels 19, the trolley traveling cylinder 20, the base center convex surface 21, the vertical direction positioning key 22, the pull rod 23, the front and rear direction positioning key 24, the side cylinder supporting frame 25, the lifting cylinder 26, the rotating cylinder 27, the rear pressing plate 28, the rotating cylinder bearing seat 29, the frame body 30, the lifting cylinder bearing seat 31, the side cylinder trunnion gland 32, the buffer support 34, the trolley platen 35, the elbow pipe fitting 36, the elbow support 37 and the tail support tooling.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in the figure, the invention provides a hydrostatic testing machine for ultra-large-diameter cast pipe fittings, which is characterized by comprising the following components: mounting a supporting frame, a main cylinder 4, a side cylinder 5, a side cylinder driving mechanism 6, a movable trolley 7 and a tool 8; the mounting support frame is of a rectangular frame structure; the cylinder body of the main cylinder 4 is arranged in the middle of the upper beam at the upper part of the mounting support frame, and the end part of a piston rod of the main cylinder 4 is provided with a tool 8; the side cylinder 5 is arranged on the side cylinder driving mechanism 6 through a trunnion, the cylinder body of the side cylinder 5 is hinged with the head of a piston rod of a rotary cylinder 26 arranged at the top of the side cylinder driving mechanism 6, and the cylinder body of the side cylinder 5 can rotate along the trunnion under the driving of the rotary cylinder 26. The side cylinder driving mechanism 6 can move along the vertical direction of the upright post 2 under the driving of a lifting cylinder 25 arranged at the top of the inner cavity of the upright post 2, namely, the side cylinder 5 can rotate and can move up and down; a tool 8 is arranged on a piston rod of the side cylinder 5; the mobile trolley 7 is arranged on the upper part of the base 3 and driven by the oil cylinder 19 to walk along the guide rail 15; the three-way pipe fitting 9 to be detected is arranged on the movable trolley 7 and moves to the center of the installation support frame, the upper port of the three-way pipe fitting 9 is plugged by a fixture on the main cylinder 4, the middle port is plugged by a fixture on the left side or the right side of the side cylinder 5, the other side cylinder provides supporting force balance, and the lower port is plugged by a fixture on the movable trolley 7.
The mounting support frame is a rectangular frame structure composed of an upper beam 1, a base 3 and upright posts 2 symmetrically arranged on two sides of the upper beam 1 and the base 3; the upper beam 1 is of a steel plate welding box structure, and the left end and the right end are respectively contacted with the processing surfaces on the inner sides of the upper parts of the two upright posts 2 and are connected through at least one group of pull rods 22; the contact surface of the upper beam 1 and the upright post 2 is positioned by a front-rear direction positioning key 23 and a vertical direction positioning key 21 and bears shearing force; the four corners of the lower part of the upper beam 1 are provided with brackets 10, and the brackets bear the supporting reaction force during the hydrostatic test of elbow pipe fittings; the base 3 is of a steel plate welding box-shaped structure, and the left end and the right end are respectively contacted with the processing surfaces on the inner sides of the lower parts of the two upright posts 2 and are connected through at least one group of pull rods 22; positioning is carried out on the contact surface of the base 3 and the upright post 2 through a front positioning key 23 and a rear positioning key 21, and shearing force is born; the middle of the base 3 is provided with a trolley moving oil cylinder 19, the trolley moving oil cylinder 19 is of a two-end hinged structure, the tail part of the trolley moving oil cylinder is hinged with the base 3, and the end part of a piston rod is hinged with the moving trolley 7; the movable trolley 7 arranged on the guide rail 15 is moved in and out of the mounting support frame along the guide rail 15 by the forward and backward movement of the piston rod; a base center convex surface 20 is arranged on the base 3 between the guide rails 15; the upright post 2 is of a steel plate welding box structure, and is fixedly connected with the upper beam 1 and the base 3 through a pull rod 22, a front-back direction positioning key 23 and a vertical direction positioning key 21 respectively to form a closed frame structure; the inside of the upright post 2 is of a cavity structure, and guide plates 14 are arranged on the front, back, left and right surfaces of the inside of the upright post 2 to provide guidance for the up-and-down movement of the side cylinder driving mechanism 6;
the main cylinder 4 is fixed on the bottom surface of the upper beam 1 through a cylinder flange, and the head part of a piston rod is designed into a piston rod ball head 11; the piston rod ball head 11 is fixed in the ball hinge seat 13 through two semicircular pressing plates 12, and the ball hinge seat 13 can rotate relatively to the piston rod ball head 11; the ball hinged support 13 is connected with the tool 8 through bolts.
The side cylinder driving mechanism 6 is installed inside the column 2, and includes: a lift cylinder 25, a rotary cylinder 26, and a side cylinder support frame 24; the side cylinder support frame 24 has a combined structure and comprises a frame main body 29 and a rear pressing plate 27; the frame main body 29 and the rear pressing plate 27 are provided with guide plates 14, and 6 guide surfaces are formed together to play a role in guiding; the upper part of the frame main body 29 is provided with a rotary cylinder bearing seat 28 and a lifting cylinder bearing seat 30, and the front part is provided with a side cylinder trunnion gland 31; the lifting cylinder 25 is a piston cylinder with two hinged ends, the tail part is hinged with a bracket at the top of the upright post 2 in a reverse hanging installation mode, and the end part of a piston rod is hinged on a lifting cylinder bearing seat 30 at the upper part of the side cylinder supporting frame 24; the side cylinder driving mechanism 6 is driven by a piston rod of the lifting cylinder 25 to slide up and down along the guide surface of the upright post 2; the rotary cylinder 26 is a cylinder trunnion piston cylinder, the cylinder trunnion of which is hinged on a rotary cylinder bearing seat 28 at the upper part of the side cylinder support frame 24, and the end part of a piston rod is hinged with the cylinder body of the side cylinder 5 after the cylinder body passes through a square hole at the upper part of the side cylinder support frame 24.
The side cylinder 5 is installed in the side cylinder support frame 24, the trunnions on the two sides of the side cylinder are fixed through the side cylinder trunnion gland 31 and form a revolute pair, and the cylinder body of the side cylinder 5 can rotate around the trunnions; the head of the piston rod of the side cylinder 5 is designed as a piston rod ball head 11; the piston rod ball head 11 is fixed in the ball hinge seat 13 through two semicircular pressing plates 12, and the ball hinge seat 13 can rotate relatively to the piston rod ball head 11; the ball hinged support 13 is connected with the tool 8 through bolts; 6 groups of buffers 32 are uniformly arranged at the end part of the piston rod, the buffers 32 are fixed on a buffer support 33, and the buffer support 33 is combined with the end part of the piston rod of the side cylinder 5 through bolts; the head of the buffer 32 is contacted with the ball hinge seat 13, and the extending distance and the buffer stroke of the buffer 32 are adjusted, so that the tool 8 and the piston rod of the side cylinder 5 basically keep a vertical angle relation no matter the cylinder body of the side cylinder 5 is in a horizontal state or an inclined state.
The movable trolley 7 is responsible for feeding the three-way pipe fitting 9 and the tool auxiliary tool into or out of the hydrostatic testing machine; the travelling car 7 includes: a trolley body 16, a compound spring 17 and wheels 18; the trolley body 16 is of a frame structure welded by square steel pipes, a plurality of composite springs 17 are uniformly and symmetrically arranged on two longitudinal beams of the trolley body 16, and the number of the composite springs 17 can be adjusted according to the weight of an actual pipe fitting and a tool; a trolley bedplate 34 is arranged above the composite spring 17 and is used for placing tools and pipe fittings; wheels 18 are arranged at the lower part of the trolley body 16, and the wheels 18 are arranged on the guide rail 15; the trolley body 16 is hinged with a piston rod of a trolley moving cylinder 19.
The guide rail 15 adopts a light rail, and the tail ends of the two ends of the guide rail 15 are provided with mechanical baffles which play a limited role.
Example 1
As shown in fig. 1-9 and 12, the present invention provides a hydrostatic testing machine for ultra-large-diameter cast pipe fittings; when the three-way pipe fitting is subjected to hydrostatic test, bell and spigot radial sealing tools in the upper direction, the lower direction and the right direction (left direction) are required to seal, corresponding tools are respectively installed on a main cylinder, cylinders on the left side and the right side and a trolley platen, after the movable trolley bears the pressure test pipe fitting and moves into equipment, the main cylinder is made to move downwards and pressurize, and the upper opening and the lower opening of the pipe fitting are sealed and pressed through the tools. And then the center height of the side cylinder is adjusted through the lifting oil cylinder, so that the center of the right (left) side cylinder is aligned with the center of the middle hole of the three-way pipe fitting, then the side cylinder moves forwards and is pressurized, and the middle hole of the pipe fitting is sealed and pressed through the bell and spigot radial sealing tool. The right (left) side contacts with the pipe fitting through the corresponding tail stay tool, and plays a role in balancing the thrust of the right cylinder.
After the pipe fitting sealing work is finished, water is injected into the pipe fitting through the low-pressure water pipeline, gas in the pipeline is discharged through the exhaust pipeline, and the water injection port and the exhaust port are both arranged on the tool. After the pipe fitting is exhausted, the ball valve is closed, and then the pipe fitting is pressurized by a high-pressure water pump, wherein the water pressure is mainly 1.6MPa, 2.5MPa, 3.5MPa and the like. The dwell time may be performed as per the batch process requirements.
Example 2
As shown in fig. 10 and 11, the present invention also provides (on the basis of embodiment 1) a hydrostatic testing machine for ultra-large-diameter cast pipe fittings; when elbow pipe fitting hydrostatic test, need control frock and the seal of two directions, install corresponding frock respectively on left side jar, right side jar, install adjustment square chest and corresponding elbow support on the dolly platen, adjust elbow center height through adjustment square chest combination, adjust side jar inclination through rotatory hydro-cylinder, promote side jar actuating mechanism and keep to the top dead center through the lift cylinder, then side jar moves forward and pressurizes, seals and compresses tightly elbow pipe fitting two holes through bell and spigot radial seal frock. The sealing requirements of elbows with various specifications can be realized.
After the pipe fitting sealing work is finished, water is injected into the pipe fitting through the low-pressure water pipeline, gas in the pipeline is discharged through the exhaust pipeline, and the water injection port and the exhaust port are both arranged on the tool. After the pipe fitting is exhausted, the ball valve is closed, and then the pipe fitting is pressurized by a high-pressure water pump, wherein the water pressure is mainly 1.6MPa, 2.5MPa, 3.5MPa and the like. The dwell time may be performed as per the batch process requirements.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. A hydrostatic testing machine for super large latus rectum cast tube spare, its characterized in that, hydrostatic testing machine include: mounting a supporting frame, a main cylinder (4), a side cylinder (5), a side cylinder driving mechanism (6), a moving trolley (7) and a tool (8);
the mounting support frame is a rectangular frame structure composed of an upper beam (1), a base (3) and upright posts (2) symmetrically arranged on two sides of the upper beam (1) and the base (3); the upper beam (1) is of a steel plate welding box structure, and the left end and the right end of the upper beam are respectively contacted with the processing surfaces on the inner sides of the upper parts of the two upright posts (2) and are connected through at least one group of pull rods (22); positioning is carried out on the contact surface of the upper beam (1) and the upright post (2) through a front-back direction positioning key (23) and a vertical direction positioning key (21), and shearing force is born; the four corners of the lower part of the upper beam (1) are provided with brackets (10) which bear the action of supporting counter force during the hydrostatic test of the elbow pipe fittings; the base (3) is of a steel plate welding box-shaped structure, and the left end and the right end of the base are respectively contacted with the processing surfaces on the inner sides of the lower parts of the two upright posts (2) and are connected through at least one group of pull rods (22); positioning is carried out on the contact surface of the base (3) and the upright post (2) through a front-back direction positioning key (23) and a vertical direction positioning key (21), and shearing force is born; a trolley moving oil cylinder (19) is arranged in the middle of the base (3), the trolley moving oil cylinder (19) is of a two-end hinged structure, the tail part of the trolley moving oil cylinder is hinged with the base (3), and the end part of a piston rod is hinged with the moving trolley (7); the movable trolley (7) arranged on the guide rail (15) moves in and out of the mounting support frame along the guide rail (15) through the forward and backward movement of the piston rod; a base center convex surface (20) is arranged on the base (3) between the guide rails (15); the upright post (2) is of a steel plate welding box structure, and is fixedly connected with the upper beam (1) and the base (3) through a pull rod (22), a front-back direction positioning key (23) and a vertical direction positioning key (21) respectively to form a closed frame structure; the inside of the upright post (2) is of a cavity structure, guide plates (14) are arranged on the front, back, left and right surfaces of the inside of the upright post (2), and the guide plates provide guidance for the up-and-down movement of the side cylinder driving mechanism (6);
the cylinder body of the main cylinder (4) is arranged in the middle of the upper beam at the upper part of the mounting support frame, and a tool (8) is arranged at the end part of a piston rod of the main cylinder (4); the side cylinder (5) is arranged on the side cylinder driving mechanism (6) through a trunnion, the cylinder body of the side cylinder (5) is hinged with the head of a piston rod of a rotating cylinder (26) arranged at the top of the side cylinder driving mechanism (6), and the cylinder body of the side cylinder (5) can rotate along the trunnion under the driving of the rotating cylinder (26);
the side cylinder driving mechanism (6) can move in the vertical direction along the upright post (2) under the driving of a lifting cylinder (25) arranged at the top of the inner cavity of the upright post (2), namely, the side cylinder (5) can rotate and can move up and down; a tool (8) is arranged on a piston rod of the side cylinder (5); the side cylinder driving mechanism (6) comprises: a lifting cylinder (25), a rotary cylinder (26), and a side cylinder support frame (24); the side cylinder supporting frame (24) is of a combined structure and comprises a frame main body (29) and a rear pressing plate (27); the frame main body (29) and the rear pressing plate (27) are provided with guide plates (14) which form 6 guide surfaces together to play a role in guiding; the upper part of the frame main body (29) is provided with a rotary cylinder bearing seat (28) and a lifting cylinder bearing seat (30), and the front part is provided with a side cylinder trunnion gland (31); the lifting cylinder (25) is a piston cylinder with two hinged ends, a reverse hanging installation mode is adopted, the tail part is hinged with a bracket at the top of the upright post (2), and the end part of a piston rod is hinged on a lifting cylinder bearing seat (30) at the upper part of the side cylinder supporting frame (24); the side cylinder driving mechanism (6) is driven by a piston rod of the lifting cylinder (25) to slide up and down along the guide surface of the upright post (2); the rotary cylinder (26) is a cylinder body trunnion piston cylinder, the cylinder body trunnion of the rotary cylinder is hinged on a rotary cylinder bearing seat (28) at the upper part of the side cylinder supporting frame (24), and after the cylinder body passes through a square hole at the upper part of the side cylinder supporting frame (24), the end part of a piston rod is hinged with the cylinder body of the side cylinder (5);
the mobile trolley (7) is arranged on the upper part of the base (3) and is driven by the trolley mobile oil cylinder (19) to walk along the guide rail (15); the three-way pipe fitting (9) to be detected is arranged on the movable trolley (7) and moves to the center of the installation support frame, the upper port of the three-way pipe fitting (9) is plugged by a tool on the main cylinder (4), the middle port is plugged by a tool on the left side or the right side of the side cylinder (5), the other side cylinder provides supporting force balance, and the lower port is plugged by a tool on the movable trolley (7).
2. The hydrostatic testing machine for ultra-large-diameter cast pipe fittings according to claim 1, wherein the side cylinders (5) are mounted inside a side cylinder support frame (24), the trunnions on both sides of the side cylinders are fixed by side cylinder trunnion covers (31) and form a revolute pair, and the cylinder bodies of the side cylinders (5) can rotate around the trunnions; the head part of the piston rod of the side cylinder (5) is designed into a ball head (11) of the piston rod; the piston rod ball head (11) is fixed in the ball hinge seat (13) through two semicircular pressing plates (12), and the ball hinge seat (13) can rotate relative to the piston rod ball head (11); the ball hinged support (13) is connected with the tool (8) through bolts; 6 groups of buffers (32) are uniformly arranged at the end part of a piston rod, the buffers (32) are fixed on a buffer support (33), and the buffer support (33) is combined with the end part of the piston rod of the side cylinder (5) through bolts; the head of the buffer (32) is contacted with the spherical hinge seat (13), and the extending distance and the buffer stroke of the buffer (32) are adjusted, so that the vertical angle relation between the tool (8) and the piston rod of the side cylinder (5) is basically maintained no matter the cylinder body of the side cylinder (5) is in a horizontal state or an inclined state.
3. The hydrostatic testing machine for ultra-large-diameter cast pipe fittings according to claim 1, wherein the main cylinder (4) is fixed on the bottom surface of the upper beam (1) through a cylinder flange, and the head of a piston rod is designed as a ball head (11) of the piston rod; the piston rod ball head (11) is fixed in the ball hinge seat (13) through two semicircular pressing plates (12), and the ball hinge seat (13) can rotate relative to the piston rod ball head (11); the ball hinged support (13) is connected with the tool (8) through bolts.
4. The hydrostatic testing machine for ultra-large-diameter cast pipe fittings according to claim 1, wherein the mobile trolley (7) is responsible for feeding the three-way pipe fittings (9) and tooling auxiliary tools into or out of the hydrostatic testing machine; the travelling car (7) comprises: a trolley body (16), a compound spring (17) and wheels (18); the trolley body (16) is of a frame structure welded by square steel pipes, a plurality of composite springs (17) are uniformly and symmetrically arranged on two longitudinal beams of the trolley body (16), and the use quantity of the composite springs (17) can be adjusted according to the weight of an actual pipe fitting and a tool; a trolley bedplate (34) is arranged on the composite spring (17) and is used for placing the tool and the pipe fitting; wheels (18) are arranged at the lower part of the trolley body (16), and the wheels (18) are arranged on the guide rail (15); the trolley body (16) is hinged with a piston rod of a trolley moving oil cylinder (19).
5. The hydrostatic testing machine for ultra-large-diameter cast pipe fittings according to claim 1, wherein the guide rail (15) is a light rail, and mechanical baffles are arranged at the tail ends of the two ends of the guide rail (15) to play a role in limiting.
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| CN201910233940.8A CN109855980B (en) | 2019-03-26 | 2019-03-26 | Hydrostatic testing machine for ultra-large-diameter cast pipe fitting |
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| CN201910233940.8A CN109855980B (en) | 2019-03-26 | 2019-03-26 | Hydrostatic testing machine for ultra-large-diameter cast pipe fitting |
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| CN109855980B true CN109855980B (en) | 2024-01-26 |
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Families Citing this family (4)
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| CN112378743B (en) * | 2020-12-15 | 2024-07-05 | 宋健 | Intermittent multidirectional pressure testing device for outer surface of water pipe |
| CN113588514B (en) * | 2021-07-21 | 2023-03-21 | 浙江艺谛环境设备有限公司 | Electrodialysis pole water plate water pressure testing tool and detection method |
| CN113848124A (en) * | 2021-09-03 | 2021-12-28 | 江苏省产品质量监督检验研究院 | Composite functional force loading device for pipe fitting test |
| CN114324033B (en) * | 2022-03-17 | 2022-06-03 | 徐州好合智能装备有限公司 | Tee bend pipe fitting manufacturing strength detection device |
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| KR20090106141A (en) * | 2008-04-04 | 2009-10-08 | (주) 케이에스인더스트리 | Clamp for Fixing Pipe and Pipe Hydrostatic Tester Equipped with the Same |
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