阅读说明：本技术 一种外压内加强型波纹管成形装置 (External pressure internal reinforced corrugated pipe forming device ) 是由 王斌斌 刘岩 李凯 尹帅 李涛 于 2020-05-21 设计创作，主要内容包括：一种外压内加强型波纹管成形装置,包括液压动力组件、模具组件和垫块更换组件；液压动力组件包括用于放置模具组件的液压工作台以及对模具组件进行下压动作的液压设备；模具组件设置在液压工作台和液压设备之间,模具组件包括上模盖、中模片、下模盖、初波垫块、合模垫块、外筒、水泵和环形橡胶囊,在上模盖和下模盖之间设置多片呈中空设置的中模片,在中模片和上模盖之间、中模片与中模片之间以及中模片与下模盖之间放置有初波垫块和合模垫块,垫块更换组件设置在多片中模片中间的中空位置处,垫块更换组件与所有初波垫块连接,通过垫块更换组件的拉动或拨动去除初波垫块。制作出符合外压膨胀节所需的波纹管。(An external pressure internal reinforced corrugated pipe forming device comprises a hydraulic power assembly, a die assembly and a cushion block replacing assembly; the hydraulic power assembly comprises a hydraulic workbench for placing the die assembly and hydraulic equipment for pressing the die assembly; the mould subassembly sets up between hydraulic pressure workstation and hydraulic equipment, the mould subassembly includes the upper die cover, well die piece, lower die cover, the primary wave cushion, the compound die cushion, the urceolus, water pump and annular rubber bag, it is the well die piece that cavity set up to set up the multi-disc between upper die cover and lower die cover, between well die piece and upper die cover, placed primary wave cushion and compound die cushion between well die piece and the well die piece and between well die piece and the lower die cover, the middle hollow position department of cushion replacement subassembly setting in the multi-disc die piece, the cushion replacement subassembly is connected with all primary wave cushion, the pulling or stirring through the cushion replacement subassembly get rid of the primary wave cushion. The corrugated pipe which is in line with the requirement of the external pressure expansion joint is manufactured.)

1. The utility model provides an strenghthened type bellows forming device in external pressure which characterized in that: comprises a hydraulic power component, a die component and a cushion block replacing component (4);

the hydraulic power assembly comprises a hydraulic workbench (14) for placing the die assembly and hydraulic equipment for pressing the die assembly;

the die assembly is arranged between a hydraulic working table (14) and hydraulic equipment, the die assembly comprises an upper die cover (6), a middle die (9), a lower die cover (11), a primary wave cushion block (12), a die assembly cushion block (16), an outer barrel (8), a water pump (13) and an annular rubber bag (15), a plurality of middle die sheets (9) which are arranged in a hollow mode are arranged between the upper die cover (6) and the lower die cover (11), the middle die sheets (9) and the upper die cover (6) are arranged between the middle die sheets (9) and between the middle die sheets (9) and the lower die cover (11), the primary wave cushion block (12) and the die assembly cushion block (16) are arranged between the middle die sheets (9) and the middle die sheets (9), the height of the primary wave cushion block (12) is higher than that of the die assembly cushion block (16), the lower portion of the upper die cover (6), a corrugated pipe blank (10) is sleeved on the upper portions, The outer cylinder (8) is sleeved on the peripheries of the middle die piece (9) and the lower die cover (11), the inner wall of the outer cylinder (8) is attached to the outer walls of the upper die cover (6) and the lower die cover (11), the outer cylinder (8), the upper die cover (6), the corrugated pipe blank (10) and the lower die cover (11) enclose an annular cavity, an annular rubber bag (15) is arranged in the annular cavity, the annular rubber bag (15) is supplied with water by a water pump (13), and the corrugated pipe blank (10) is sleeved between the inner side of the annular rubber bag (15) and the outer side of the middle die piece (9);

the cushion block replacing component (4) is arranged in a hollow position in the middle of the die sheets (9) in the plurality of sheets, the cushion block replacing component (4) is connected with all primary wave cushion blocks (12), and the primary wave cushion blocks (12) are removed by pulling or stirring the cushion block replacing component (4).

2. The external pressure internally reinforced type corrugated pipe forming device according to claim 1, wherein: the upper surface of the middle mold sheet (9) and the upper surface of the lower mold cover (11) are provided with sliding chutes (9-1) used for clamping and arranging the primary wave cushion blocks (12).

3. The external pressure internally reinforced type corrugated pipe forming device according to claim 1, wherein: and positioning hole grooves (9-2) used for clamping and arranging mold closing cushion blocks (16) are formed in the upper surface of the middle mold sheet (9) and the upper surface of the lower mold cover (11).

4. The external pressure internally reinforced type corrugated pipe forming device according to claim 2, wherein: the notch of the sliding chute (9-1) has a downward-inclined taper.

5. The external pressure internally reinforced type corrugated pipe forming device according to claim 1, wherein: the states of the primary wave cushion block (12) on the upper surface and the die closing cushion block (16) of the middle dies (9) are monitored by wireless video monitoring devices (7) arranged on the upper die cover (6) and the lower die cover (11).

6. The external pressure internally reinforced type corrugated pipe forming device according to claim 1, wherein: the cushion block replacing component (4) comprises a guide rod (4-3) and a replacing rod (4-4), the guide rod (4-3) is vertically arranged, a plurality of replacing rods (4-4) which are horizontally arranged are arranged on the outer surface of the guide rod (4-3) from top to bottom, the free ends of the replacing rods (4-4) are connected with a plurality of primary wave cushion blocks (12) in a one-to-one correspondence mode, when the replacing rod (4-4) conducts toggle action, the end portion of the guide rod (4-3) is connected with a hand wheel (4-1) or a rotating mechanism which is manually controlled to rotate, when the replacing rod (4-4) conducts telescopic action, a telescopic mechanism which drives the replacing rod (4-4) to stretch is arranged inside the replacing rod (4-4).

7. The external pressure internal reinforced type corrugated pipe forming device according to claim 6, wherein: the replacing rod (4-4) is connected with the primary wave cushion block (12) through a spring (4-5).

Technical Field

The invention belongs to the technical field of pipeline compensation, and particularly relates to an external pressure internal reinforced corrugated pipe forming device.

Background

Because under the external pressure operating mode, the bellows stress state is tensile, does not have the problem of depression bar stability, so the bellows does not have the risk of post unstability. The wave number is not limited when the corrugated pipe is designed, and more wave numbers can be designed to realize larger displacement compensation amount, so that the external pressure type expansion joint is very commonly applied.

In design, the commonly used external pressure type expansion joint structure comprises an external pressure axial type, an external pressure straight pipe pressure balance type and the like, as shown in figures 1-2. In addition, patent (patent number: ZL.201651546.3) an internal-reinforced external-pressure axial expansion joint, an internal-reinforced corrugated pipe design structure is proposed by embedding an internal reinforcing ring in a wave crest, and the corrugated pipe structure is applied to the axial expansion joint, and the design structure is shown in figure 3.

In the forming technology, hydroforming and mechanical forming are the most commonly used processes in the corrugated pipe industry. The hydraulic forming corrugated pipe has high surface quality, dimensional accuracy and technical level, and is suitable for forming U-shaped, S-shaped and omega-shaped corrugated pipes made of stainless steel, copper alloy, high-temperature alloy and other materials with good plasticity. The forming pressure of the existing hydraulic forming corrugated pipe is internal pressure, and the corrugated pipe is expanded outwards by the pressure. The method of formation is shown in figure 4,

the corrugated pipe is formed by that a material is plastically deformed under the action of internal pressure of a pipe blank sleeved in a die to form a primary wave (see figure 4 a), then the internal pressure is maintained, a primary wave cushion block is changed into a forming cushion block, axial displacement is applied to the pipe blank, and a required waveform is formed under the restraint of the die (see figure 4 b). The external pressure corrugated pipe is used in external pressure working condition, but the forming is also manufactured according to the method of hydraulic bulging from internal pressure to external pressure, and is only limited to forming external pressure unreinforced corrugated pipe.

For the external pressure internal reinforced corrugated pipe described in the patent (patent number: ZL.201651546.3), the currently common internal pressure external expansion forming method cannot form the corrugated pipe with the structure. The documents and patents related to the formation of corrugated pipes are also rarely reported on the forming device and forming method of the external pressure internal reinforced corrugated pipe.

Disclosure of Invention

In order to solve the technical problems, the invention provides an external pressure internal reinforced type corrugated pipe forming device for manufacturing a corrugated pipe meeting the requirement of an external pressure expansion joint.

In order to realize the technical purpose, the adopted technical scheme is as follows: an external pressure internal reinforced corrugated pipe forming device comprises a hydraulic power assembly, a die assembly and a cushion block replacing assembly;

the hydraulic power assembly comprises a hydraulic workbench for placing the die assembly and hydraulic equipment for pressing down the die assembly;

the die assembly is arranged between a hydraulic working table and hydraulic equipment, and comprises an upper die cover, a middle die sheet, a lower die cover, a primary wave cushion block, a die closing cushion block, an outer barrel, a water pump and an annular rubber bag, wherein a plurality of hollow middle die sheets are arranged between the upper die cover and the lower die cover, the primary wave cushion block and the die closing cushion block are arranged between the middle die sheet and the upper die cover, between the middle die sheet and the middle die sheet, and between the middle die sheet and the lower die cover, the height of the primary wave cushion block is higher than that of the die closing cushion block, a corrugated pipe blank is sleeved on the lower part of the upper die cover, the upper part of the middle die sheet and the upper part of the lower die cover, the outer barrel is sleeved on the peripheries of the upper die cover, the middle die sheet and the lower die cover, the inner wall of the outer barrel is attached to the outer walls of the upper die cover and the lower die cover, the outer barrel, the upper die, a corrugated pipe blank is sleeved between the inner side of the annular rubber bag and the outer side of the middle die sheet;

the cushion block replacing component is arranged in the middle of the hollow position of the die sheets in the plurality of sheets, the cushion block replacing component is connected with all the primary wave cushion blocks, and the primary wave cushion blocks are removed by pulling or shifting the cushion block replacing component.

The upper surface of the middle die plate is provided with a sliding groove for clamping the primary wave cushion block.

And a positioning hole groove used for clamping the die closing cushion block is arranged on the upper surface of the middle die plate.

The notch of the chute has a downward sloping taper.

The states of the primary wave cushion blocks and the die closing cushion blocks on the upper surfaces of the middle dies are monitored by wireless video monitoring devices arranged on the upper die cover and the lower die cover.

The cushion is changed the subassembly and is included the guide arm and change the pole, the vertical setting of guide arm, the change pole of many level settings of installation from last to down at the guide arm surface, many free ends of changing the pole are connected with a plurality of primary wave cushion one-to-ones, when changing the pole and do the action of stirring, the end connection of guide arm has manual control pivoted hand wheel or slewing mechanism, when changing the pole and do flexible action, the guide arm, change the pole inside and be equipped with the drive and change the flexible telescopic machanism of pole.

The replacing rod is connected with the primary wave cushion block through a spring.

The invention has the beneficial effects that: in order to meet the forming requirement, the forming device is designed to realize the forming of the inner reinforced corrugated pipe by the combined action of the outer forming pressure of the corrugated pipe blank and the downward movement of the hydraulic machine. In the concrete structure, an annular rubber bag is arranged in a space formed by the outer pipe, the upper die cover, the lower die cover and the corrugated pipe blank, the rubber bag forms a pressure boundary, and forming pressure is provided by the pressure boundary. The cushion block replacing component is used for poking the primary wave cushion block, and only the die closing cushion block is left, so that the function of replacing the cushion block is realized. After the molding is completed, the mold closing pad is ejected from the positioning hole groove of the mold piece shown in fig. 8 after the bellows rebounds. Through a corrugated pipe forming test, correct and reasonable forming technological parameters are designed, and the inner reinforced corrugated pipe which meets the standard requirements can be formed by using the inner reinforced corrugated pipe forming device disclosed by the patent.

Drawings

FIG. 1 is a view showing the construction of an external pressure axial type expansion joint;

FIG. 2 is a structural diagram of a pressure-balanced expansion joint of an external pressure straight pipe;

FIG. 3 is a view showing the construction of an internal enhanced external pressure axial type expansion joint;

FIG. 4 is a schematic view of a prior art bellows formation;

FIG. 5 is a schematic diagram of the primary wave shaping of the present invention;

FIG. 6 is a schematic view of a matched mold forming of the present invention;

FIG. 7 is an assembled structural view of the primary wave cushion block, the die closing cushion block and the intermediate die sheet of the present invention;

FIG. 8 is a schematic top view of a middle mold piece according to the present invention;

FIG. 9 is a schematic cross-sectional view of a mesotemplate of the present invention;

FIG. 10 is an enlarged view of section I of FIG. 9;

FIG. 11 is a view of the cushion block replacement assembly of the present invention assembled with the upper and lower mold caps;

FIG. 12 is a schematic view of the pad exchange assembly of the present invention;

FIG. 13 is a bottom view of the structure of FIG. 12;

figure 14 is an assembled structural view of a force transfer cylinder and pad change-out assembly according to the invention;

fig. 15 is a schematic view of the force transfer cylinder of the present invention;

FIG. 16 is a cross-sectional view taken along line A-A of FIG. 15;

in the figure: 1. the device comprises a hydraulic machine frame, 2, a hydraulic machine sliding block, 3, a force transmission cylinder, 4, a cushion block replacing component, 5, a guide bearing, 6, an upper die cover, 7, a wireless video monitoring device, 8, an outer cylinder, 9, a middle die, 10, a corrugated pipe blank, 11, a lower die cover, 12, a primary wave cushion block, 13, a water pump, 14, a hydraulic machine workbench, 15, an annular rubber bag, 16, a die assembly cushion block, 3-1, an axial hole groove, 3-2, an annular hole groove, 4-1, a hand wheel, 4-2, a wheel disc, 4-3, a guide rod, 4-4, a replacing rod, 4-5, a spring, 9-1, a sliding groove, 9-2, a positioning hole groove, 9-1-1, a primary wave cushion block positioning hole groove, 9-1-2 and a sliding and dropping sliding chute for the primary wave cushion block.

Detailed Description

The patent is described with reference to the drawings and the embodiments, but the patent is not limited to the embodiments.

An external pressure internal reinforced corrugated pipe forming device comprises a hydraulic power assembly, a die assembly and a cushion block replacing assembly.

The hydraulic power assembly comprises a hydraulic table 14 for placing the die assembly and hydraulic equipment for pressing down the die assembly; as shown in fig. 5 and 6, the hydraulic device comprises a hydraulic machine frame 1, a hydraulic machine slide block 2 and a force transmission barrel 3, and the force transmission barrel 3 is driven to move up and down to perform a pressing action by guiding the hydraulic machine slide block 2 on the hydraulic machine frame 1.

The mould assembly is arranged between a hydraulic working table 14 and hydraulic equipment, the mould assembly comprises an upper mould cover 6, a middle mould sheet 9, a lower mould cover 11, a primary wave cushion block 12, a mould closing cushion block 16, an outer cylinder 8, a water pump 13 and an annular rubber bag 15, the upper mould cover 6 directly bears the pressing pressure of a hydraulic power assembly, as shown in figures 5 and 6, a force transmission cylinder and the upper mould cover 6 are coaxially arranged, the hydraulic pressure is uniformly applied to the upper mould cover 6, a plurality of hollow middle mould sheets 9 are arranged between the upper mould cover 6 and the lower mould cover 11, the shape of the middle mould sheet 9 is the same as the balanced annular shape shown in figure 3, the mould assembly not only can play a role of a mould, but also can be directly used as a key part of an expansion joint and is formed into an integral part with a corrugated pipe at one time without secondary processing and installation, the primary wave cushion block 12 and the mould closing cushion block 16 are arranged between the middle mould sheet 9 and the upper mould cover 6, between the middle mould sheet, the primary wave cushion block 12 and the die closing cushion block 16 at the same layer are uniformly distributed, the height of the primary wave cushion block 12 is higher than that of the die closing cushion block 16, the corrugated pipe blank 10 is sleeved on the lower part of the upper die cover 6, the upper parts of the middle die plate 9 and the lower die cover 11, the inner diameter of the corrugated pipe blank 10 is matched with the lower part of the upper die cover 6, the upper parts of the middle die plate 9 and the lower die cover 11, the outer barrel 8 is sleeved on the peripheries of the upper die cover 6, the middle die plate 9 and the lower die cover 11, the inner wall of the outer barrel 8 is attached to the outer walls of the upper die cover 6 and the lower die cover 11, the outer barrel 8, the upper die cover 6, the corrugated pipe blank 10 and the lower die cover 11 form an annular cavity, an annular rubber bag 15 is arranged in the annular cavity, water is supplied to the annular rubber bag; according to the size of the corrugated pipe to be formed, a proper mould assembly is selected and assembled according to the requirements of the figure, and the inner reinforced corrugated pipe can be formed under reasonable forming process parameters.

The cushion replacing component 4 is arranged at a hollow position in the middle of the die 9 in the plurality of pieces, the cushion replacing component 4 is connected with all primary wave cushion blocks 12, the primary wave cushion blocks 12 are removed by pulling or stirring the cushion replacing component 4, the structure of the cushion replacing component 4 is not limited in detail as long as all the primary wave cushion blocks 12 can be pulled out from all the positions, and the gaps between the die 9 and the upper die cover 6, between the middle die 9 and between the middle die 9 and the lower die cover 11 are the height of the die closing cushion block 16 in adjustment, so that the die closing forming after the primary wave forming is realized.

The upper surface of the middle die plate 9 is provided with a sliding groove 9-1 for clamping a primary wave cushion block 12, and the sliding groove 9-1 can limit the primary wave cushion block 12 and prevent the primary wave cushion block from moving left and right when being pressed down.

The upper surface of the middle die plate 9 is provided with a positioning hole groove 9-2 used for clamping the die closing cushion block 16, and the positioning hole groove 9-2 can limit the die closing cushion block 16 and prevent the primary wave cushion block from moving left and right when being pressed down.

The notch of the chute 9-1 has a downward-sloping taper to facilitate the pulling of the primary mold pad 12 out of the chute 9-1, as shown in fig. 10, the chute 9-1 is divided into a primary wave pad positioning hole groove 9-1-1 and a primary wave pad sliding-off chute 9-1-2, the primary wave pad sliding-off chute 9-1-2 has a downward-sloping taper, and the primary wave pad positioning hole groove 9-1-1 is matched with the primary wave pad.

The states of the upper surface primary wave cushion block 12 and the die assembly cushion block 16 of the plurality of middle dies 9 are monitored by a wireless video monitoring device 7. The wireless video monitoring devices 7 are arranged on the upper die cover 6 and the lower die cover 11, and 2-6 video devices can be uniformly distributed on the upper die cover and the lower die cover according to the diameter in order to ensure that the state of the cushion block during forming is clearly seen, as shown in figures 5 and 6.

As shown in fig. 11, the pad changing assembly 4 includes a guide bar 4-3 and a changing bar 4-4, the guide bar 4-3 is vertically disposed, a plurality of horizontally arranged replacing rods 4-4 are arranged on the outer surface of the guide rod 4-3 from top to bottom, the free ends of the replacing rods 4-4 are correspondingly connected with the primary wave cushion blocks 12 one by one, when the replacing rod 4-4 is moved, the end of the guide rod 4-3 is connected with a hand wheel 4-1 or a rotating mechanism which is manually controlled to rotate, the primary wave cushion block is pulled out by the poking action of the replacing rod 4-4 through the rotation of the guide rod 4-3, when the replacing rod 4-4 is in telescopic action, the guide rod 4-3 and the replacing rod 4-4 are internally provided with telescopic mechanisms for driving the replacing rod to stretch, and the primary wave cushion block is pulled out by the pulling of the replacing rod 4-4.

The replacing rod 4-4 is connected with the primary wave cushion block 12 through a spring 4-5, when the guide rod 4-3 is in a rotating mode, the sliding groove is an arc-shaped sliding groove, the primary wave cushion block 12 is convenient to pull out, the spring plays a role of flexible connection, the pulling force can be increased along with the increase of the deformation of the spring during rotation, and the pulling action is better completed.

An external pressure internal reinforced corrugated pipe forming device is applied, and under the combined action of water pump hydraulic pressure and hydraulic press slide block downward-pressing displacement, a corrugated pipe blank 10, an upper die cover, a lower die cover, a middle die 9 and other parts are assembled according to a graph 5. The water pump pressurizes to the primary wave pressure, through setting up the wireless video monitoring primary wave state on upper and lower die covers, treat after the primary wave state is stable, change the assembly through the cushion this moment, dial the primary wave cushion 12 along the primary wave cushion spout, through the wireless video monitoring device that the figure shows and installs on upper and lower die covers, after confirming the cushion state, then according to fig. 6 shows, the water pump continues to pressurize to the matched mold pressure, under the combined action of matched mold pressure and the displacement of pushing down of hydraulic press slider, hydraulic press slider 2 pushes down to the matched mold cushion state. At the moment, the water pump releases the pressure, the hydraulic press slide block moves upwards, the corrugated pipe rebounds, all parts of the forming device are sequentially removed, the die closing cushion block 16 is removed along the sliding groove on the middle die piece, and the inner reinforced corrugated pipe meeting the standard requirement is formed.