阅读说明：本技术 一种管状液压囊及压力发生装置 (Tubular hydraulic bag and pressure generating device ) 是由 张永利 于 2019-09-29 设计创作，主要内容包括：本发明公开一种管状液压囊及压力发生装置,所述管状液压囊包括囊体和囊咀,囊体呈扁带管状,包括合成橡胶的内胆层、外护层和由多层高强纤维交叉密织的加强层,能承受数十兆帕的内部压力,囊咀包括咀体、锁纤环和套筒,它们构成的锁压结构可利用囊内流体压力实现自锁紧和动态密封；所述压力发生装置包括上板、下板和管状液压囊,上板和下板上有囊槽,囊槽及其中的凹凸形衬垫体将扁带状囊体夹挤呈弯曲的波浪形,囊体内被注入压力液时由扁趋圆径向膨胀,推动上板或下板克服负载阻力发生位移,从而产生机械做功的压力。本发明压力发生装置,既能产生大吨位的压力,又能有效地减小设备的体积、重量,节约成本,油压、水压均可适用。(The invention discloses a tubular hydraulic bag and a pressure generating device, wherein the tubular hydraulic bag comprises a bag body and a bag mouth, the bag body is in a flat belt tubular shape, comprises an inner container layer and an outer protective layer of synthetic rubber and a reinforcing layer formed by cross and dense weaving of a plurality of layers of high-strength fibers and can bear the internal pressure of dozens of megapascals, the bag mouth comprises a mouth body, a fiber locking ring and a sleeve, and a pressure locking structure formed by the bag body, the fiber locking ring and the sleeve can realize self-locking and dynamic sealing by using the fluid pressure in the bag; the pressure generating device comprises an upper plate, a lower plate and a tubular hydraulic bag, wherein bag grooves are formed in the upper plate and the lower plate, the flat belt-shaped bag body is clamped and squeezed into a curved wave shape by the bag grooves and a concave-convex liner body in the bag grooves, and the bag body is inflated radially from a flat shape to a round shape when pressure liquid is injected into the bag body, so that the upper plate or the lower plate is pushed to overcome load resistance to generate displacement, and pressure for mechanical work is generated. The pressure generating device can generate large-tonnage pressure, effectively reduce the volume and weight of equipment, save cost and be suitable for both oil pressure and water pressure.)

1. A tubular hydraulic bladder, characterized by: comprises that

The capsule body comprises a capsule body (1), wherein the capsule body (1) comprises an inner container layer (11), a reinforcing layer (12) and an outer protective layer (13) which are sequentially sleeved from inside to outside, the inner container layer (11), the reinforcing layer (12) and the outer protective layer (13) are in a flat belt tubular shape, the inner container layer (11) and the outer protective layer (13) are made of elastic synthetic rubber, the reinforcing layer (12) comprises a plurality of fiber woven layers, the fiber woven layers are formed by spirally and obliquely and tightly weaving a plurality of high-strength fiber yarn bundles, the inner container layer (11) and the reinforcing layer (12) can slide relatively, and the fiber woven layers of the reinforcing layer (12) can slide relatively;

The bag mouth (2) is arranged at the end part of the bag body (1), is a group of concentrically assembled metal parts and comprises a mouth body (21), a fiber locking ring (22) and a sleeve (23), the inner end of the mouth body (21) is inserted into the end part of the liner layer (11), and the fiber locking ring (22) and the sleeve (23) lock and press the end parts of the reinforcing layer (12) and the liner layer (11) and tightly sleeve the mouth body (2); the center of the mouth body (21) is provided with a through hole (24) communicated with the inner container cavity of the bag body (1); the outer end of the mouth body (21) is provided with a thread which can be connected with a locking nut (25) and a hydraulic pipeline.

the hydraulic pipeline injects pressure liquid into the bag body (1) through the bag nozzle (2) to expand the bag body (1), and the bag body is changed from a soft flat belt tube shape to a cylinder shape with increased rigidity, thereby generating pressure to do external mechanical work.

2. The tubular hydraulic bladder according to claim 1, wherein: the diameter of the inner layer yarn bundle is smaller than that of the outer layer, the number of weaving strands of the inner layer yarn bundle is larger than that of the outer layer, and the twist of the inner layer yarn bundle is larger than that of the outer layer.

3. The tubular hydraulic bladder according to claim 1, wherein: the material of each fiber weaving layer yarn bundle in the reinforcing layer (12) is one or two of aromatic polyamide filament fiber and ultrahigh molecular weight polyethylene filament fiber.

4. The tubular hydraulic bladder according to claim 1, wherein: the insertion section of the mouth body (21) is provided with an annular boss (26) and an annular groove (27); the fiber locking ring (22) is sleeved from the outer end of the mouth body (21) and blocked by the boss (26), and the end part of the inner container layer (11) and the fiber woven layer are sleeved and locked on the boss (26); the tail section of the fiber woven layer penetrating through the fiber locking ring (22) in the reinforcing layer (12) is reversely folded, and the fiber woven layer is sleeved around the fiber locking ring (22) and tensioned towards the side of a boss (26); the sleeve (23) sleeves the end part of the inner container layer (11) and the fiber braided layer of the fiber locking ring (22) and tightly presses the outer wall of the insertion section of the mouth body (21).

5. The tubular hydraulic bladder according to claim 1, wherein: the mouth body (21) is provided with an annular convex outer conical surface (28), and a circular hole at the bottom of the sleeve (23) is provided with an inner conical surface matched with the circular hole.

6. A pressure generating device characterized by: comprising an upper plate (3) and a lower plate (4), between said upper plate (3) and said lower plate (4) there being provided at least one tubular hydraulic bladder according to any one of claims 1 to 4.

7. The pressure generating device of claim 6, wherein: at least one capsule groove (5) is arranged below the upper plate (3), and at least one capsule groove (5) is arranged above the lower plate (4). The capsule groove (5) corresponds to each other vertically and is parallel to each other, and the tubular hydraulic capsules are arranged in the capsule groove (5) and are fixed at the capsule mouths (2) at the end parts of the tubular hydraulic capsules by using hoops or pipe clamps (7) at the two ends of the upper plate (3) and the lower plate (4).

8. Pressure generating device according to claims 6, 7, characterized in that: the novel capsule comprises a capsule groove (5), wherein a lining body (6) is arranged in the capsule groove (5), the surface of the lining body (6) is in an arc-shaped concave-convex wave shape, concave-convex parts of the lining body (6) in the capsule groove (5) which correspond to each other up and down are complementary and opposite to each other, and the capsule body (1) is extruded to be in a wave shape along the longitudinal direction when not bearing pressure.

9. Pressure generating device according to claims 6, 7, characterized in that: when a plurality of bag grooves (5) are formed in the upper plate (3) and the lower plate (4), the adjacent bag grooves (5) are arranged in an adjacent mode, and the corresponding bag grooves (5) are aligned in the forward direction or are staggered from left to right by 1/2 of the width of the bag grooves and aligned in a space-inserting mode.

10. The pressure generating device of claim 9, wherein: when the bag grooves (5) on the upper plate (3) and the lower plate (4) are multiple, a plurality of holes which are opposite up and down are formed in the upper plate (3) and the lower plate (4), a plurality of upright columns (8) penetrate through the holes, at least one of the upper plate (3) and the lower plate (4) can slide up and down along the upright columns (8), and the upright columns (8) are provided with return springs (9) which enable the upper plate (3) and the lower plate (4) to be tightly closed.

Technical Field

The invention relates to the technical field of hydraulic pressure, in particular to a tubular hydraulic bag and a pressure generating device.

Background

In hydraulic mechanical equipment, a hydraulic cylinder is a common element for converting fluid pressure into mechanical force, the cylinder body and the piston (plunger) which are main parts of the hydraulic cylinder are rigid bodies made of metal materials, and when the pressure load required by the equipment is large, the size or the number of the hydraulic cylinders must be correspondingly increased, so that the equipment becomes large and heavy, the difficulty and the cost of the manufacturing process are obviously increased, and the use condition and the maintenance requirement of the equipment are also more severe. The above contradiction is solved only by improving the material and optimizing of the hydraulic cylinder, the effect is very limited, and the adoption of flexible hydraulic pressure, namely, the flexible bag type hydraulic actuating element replaces a rigid hydraulic cylinder, and the expansion and contraction of the bag body replaces the reciprocating output mechanical pressure of a piston, is a feasible scheme capable of effectively reducing the volume and the weight of hydraulic equipment, and has strong practicability in at least some large-tonnage short-stroke application occasions, such as: the method comprises the following steps of die pressing and compounding of plates, calendering and molding of sheet metal parts, breaking and dismantling of concrete, fracturing and digging of rock masses and the like. The hydraulic bag capable of directly driving the hydraulic machine is inevitably required to have a larger volume deformation amount and bear the system pressure of more than ten megapascals and even tens of megapascals for lasting and repeated work without bursting, and the hydraulic bag-like element with the performance is not disclosed in the known technology.

Disclosure of Invention

The invention aims to provide a tubular hydraulic bladder and a pressure generating device, which are used for solving the problems in the prior art, and a flexible hydraulic bladder is used for replacing a rigid hydraulic cylinder to be used as a driving actuating element in the pressure generating device, so that the weight and the volume of equipment are reduced, and the manufacturing and using cost is reduced.

In order to achieve the purpose, the invention provides the following scheme:

The present invention provides a tubular hydraulic bladder comprising:

The bag body comprises an inner container layer, a reinforcing layer and an outer protective layer which are sequentially arranged from inside to outside, the bag body is in a soft flat belt tubular shape under the natural state without bearing pressure, the bag body can be bent and folded by fingers, and the bag body radially expands into a cylinder with increased rigidity when bearing pressure inside. The inner container layer is made of high-elasticity synthetic rubber material and is used for preventing pressure liquid from seeping out; the reinforcing layer comprises more than two fiber braided layers, each layer is formed by spirally, obliquely and tightly braiding a plurality of high-strength fiber yarn bundles, and the reinforcing layer is used for resisting huge internal pressure and preventing the inner container layer from cracking due to over expansion or local bulging; the fiber braided layers of the reinforcing layer can slide relatively between the inner container layer and the reinforcing layer, so that deformation and expansion of the bag body are facilitated compared with the bag body which is fused or bonded into a whole; the outer protective layer is a wear-resistant elastomer rubber coating layer and is used for protecting fibers of the reinforcing layer from being damaged by friction.

The capsule mouth is arranged at the end part of the capsule body and used for locking and sealing the capsule mouth and connecting a hydraulic pipeline. The sacculus mouth comprises a mouth body, a fiber locking ring and a sleeve, wherein the inner end of the mouth body is inserted into the end part of the inner container layer, and the fiber locking ring and the sleeve lock and press the reinforcing layer and the end part of the inner container layer and tightly sleeve the mouth body; the center of the nozzle body is provided with a through hole communicated with the inner container cavity of the bag body; the outer end of the mouth body is provided with a thread which can be connected with a hydraulic pipeline.

preferably, a plurality of fibre weaving layers in the enhancement layer, the diameter of inlayer yarn bundle is less than the skin, and the strand number of inlayer yarn bundle is greater than the skin, and the twist of inlayer yarn bundle is greater than the skin, and the more outer weaving of inlayer is more compact promptly, does benefit to like this and prevents that the rubber on inner bag layer from extruding from the fibre weaving layer mesh because of the high pressure, and the elongation of breaking of interior weaving layer yarn bundle can be increased to great twist, makes like this that the utricule inflation time interior weaving layer have bigger accommodation in the aspect of sharing tensile load with the outer weaving layer.

Preferably, the material of the fiber braided layer yarn bundles in the reinforcing layer is one or two of filament fibers of polyamide and ultrahigh molecular weight polyethylene.

Preferably, the insertion section of the mouth body is provided with an annular boss and an annular groove; the fiber locking ring is sleeved from the outer end of the mouth body and is blocked by the boss, and the end part of the liner layer and the fiber woven layer are locked and pressed on the mouth body below the boss; the tail section of the fiber braided layer penetrating through the fiber locking ring in the reinforcing layer is reversely sleeved and folded back from the periphery of the fiber locking ring, and the fiber locking ring is sleeved and tensioned towards the boss side; the sleeve sleeves the end part of the inner container layer and the fiber weaving layer of the fiber locking ring around the sleeve and tightly presses the outer wall of the mouth body insertion section. The self-locking structure surrounding the sleeve pressure can ensure that the fiber braided layer cannot slip off when bearing huge tensile force, when the liquid pressure in the capsule is increased, the force of the jacking nozzle body and the tensioning reinforcing layer is increased, so that the locking pressure between the fiber locking ring and the boss and the attaching force of the end part of the liner layer and the insertion end of the nozzle body are correspondingly increased, and the dynamic sealing effect is achieved. The combination of the cuff and the body can be disassembled and reassembled, thereby facilitating the inspection and the replacement of components.

Preferably, the locking section of the mouth body is provided with an annular convex outer conical surface, the round hole at the bottom of the sleeve is provided with an inner conical surface matched with the round hole, so that the sleeve can be limited, and the damage of the end part of the inner container layer caused by excessive extrusion between the inner bottom surface and the side surface of the boss when the sleeve is pressed inwards is avoided.

The hydraulic pipeline injects pressure liquid into the bag body through the bag nozzle, so that the bag body expands radially and changes from a soft flat belt tube shape to a cylinder shape with rigidity increased, thereby doing work mechanically to the outside.

A pressure generating device comprises an upper plate and a lower plate, wherein at least one tubular hydraulic bag is arranged between the upper plate and the lower plate.

Preferably, the pressure generating device further comprises a bladder groove, the bladder groove serving to hold and position the tubular hydraulic bladder. The hydraulic bag comprises an upper plate and a lower plate, and is characterized in that at least one bag groove is formed in the lower surface of the upper plate, at least one bag groove is formed in the upper surface of the lower plate, the bag grooves can be formed by sinking the surfaces of the lower plate and the lower plate, and can also be strip-shaped groove bodies additionally arranged on the surfaces of the lower plate and the lower plate, the bag grooves are vertically corresponding and are mutually parallel, the tubular hydraulic bags are arranged in the bag grooves, and bag mouths at the end parts of the tubular hydraulic bags are fixed at the two ends of the upper plate and the lower plate through hoop.

Preferably, a liner body is arranged in the bag groove, the surface of the liner body is in an arc concave-convex wave shape, concave-convex parts of the liner body in the upper bag groove and the lower bag groove are complementary and opposite, and the bag body is extruded to be in a wave flat belt shape along the longitudinal direction. The wavy arrangement has two advantages of offsetting the length contraction formed when the bag body is expanded, reducing the friction of the bag wall and obtaining larger pressure working stroke.

Preferably, when a plurality of bag grooves are formed in the upper plate and the lower plate, the adjacent bag grooves are arranged in an adjacent mode, the upper bag groove and the lower bag groove are aligned in the positive direction, or the bag grooves are staggered from each other by 1/2 of the width of the bag groove and aligned in a hollow mode. Compared with the two arrangement modes under the same condition, the positive alignment can obtain larger working stroke, and the inserting alignment can generate larger pressure.

Preferably, when a plurality of capsule grooves are formed in the upper plate and the lower plate, a plurality of openings which are opposite up and down are formed in the upper plate and the lower plate, a plurality of guide rods penetrate through the openings, at least one of the upper plate and the lower plate can slide up and down along the guide rods, and a return spring which enables the upper plate and the lower plate to be tightly closed is arranged on the guide rods.

The invention discloses the following technical effects:

The tubular hydraulic bag has the advantages that the bag body has the volume expansion rate more than two times, can bear the system working pressure of dozens of megapascals, and can be expanded and contracted repeatedly for a long time; the bag mouth structure can realize self-locking and dynamic sealing by utilizing the pressure of fluid in the bag, can self-adaptively adjust the balance of tension load between the fiber braided layers in each reinforcing layer, and can also be conveniently disassembled and assembled.

The pressure generating device driven by the tubular hydraulic bag provided by the invention can generate large-tonnage mechanical force, effectively reduce the volume and weight of equipment, reduce the manufacturing and using cost, and is suitable for both oil pressure and water pressure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic diagram of the external structure of a tubular hydraulic bladder according to the present invention;

FIG. 2 is a detailed cross-sectional view of the tubular hydraulic bladder of the present invention;

FIG. 3 is a schematic diagram of an experimental pressure performance of the tubular hydraulic bladder of the present invention;

FIG. 4 is a schematic longitudinal cross-sectional view of the construction of the tube pressure generating device of the present invention;

FIG. 5 is a schematic cross-sectional view of a pressure generating device according to the present invention;

FIG. 6 is a schematic diagram of a multi-hydraulic-bag structure of the pressure generating device of the present invention;

FIG. 7 is a schematic view of the arrangement of the bladder grooves of the pressure generating device in a forward alignment manner according to the present invention;

FIG. 8 is a schematic diagram of the bladder slot empty-insertion alignment arrangement of the pressure generating device of the present invention.

The capsule comprises a capsule body 1, an inner container layer 11, a reinforcing layer 12, an outer protective layer 13, a capsule mouth 2, a mouth body 21, a fiber locking ring 22, a sleeve 23, a through hole 24, a locking nut 25, an annular boss 26, an annular groove 27, an outer conical surface 28, an upper plate 3, a lower plate 4, a capsule groove 5, a liner body 6, a clamp or pipe clamp 7, an upright column 8 and a return spring 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described more clearly and more precisely in the following with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a tubular hydraulic bag, which is shown in a figure 1-2 and comprises a bag body 1 and a bag mouth 2, wherein the bag body 1 comprises an inner container layer 11, a reinforcing layer 12 and an outer protective layer 13 which are sequentially arranged from inside to outside, the inner container layer 11, the reinforcing layer 12 and the outer protective layer 13 are arranged in a covering manner layer by layer, each layer is relatively independent and is not a composite structure which is fused together, and the inner container layer 11 and the reinforcing layer 12 and each fiber woven layer in the reinforcing layer 12 can relatively freely slide. The capsule 1 is in a flat and long belt shape in a natural state without pressurization, the capsule 1 can be curled or folded by hands (as shown in figure 1a), and when high-pressure fluid is injected, the capsule 1 is in a cylindrical shape with rigidity increased by rounding from a flat shape and expanding in a radial direction (as shown in figure 1 b). The bag mouth 2 is arranged at the end part of the bag body 1 and used for locking and sealing a bag mouth and connecting a hydraulic pipeline, the bag mouth 2 comprises a mouth body 21, a fiber locking ring 22, a sleeve 23 and other metal parts which can be assembled concentrically, the inner end of the mouth body 21 is inserted into the end part of the liner layer 11, the fiber locking ring 22 and the sleeve 23 lock and press the end part of the liner layer 11 and the reinforcing layer 12 and tightly sleeve the mouth body 21, the center of the mouth body 21 is provided with a through hole 24 communicated with the inner cavity of the bag body, and the outer end is provided with a connecting thread (as shown in figure 2).

According to a further optimized scheme, the reinforcing layer 12 is at least two fiber braided layers, each fiber braided layer is formed by spirally and obliquely weaving a plurality of strands of high-strength fiber yarn bundles in a crossed mode, the number of strands of the yarn bundles in the forward rotation direction and the reverse rotation direction is the same as the weaving angle of the same layer of braided layer, the weaving angle is 35-55 degrees, preferably 45 degrees, and the weaving angle refers to an included angle between the tangential direction of the yarn bundles and a parallel line of a weaving central shaft; when the reinforcing layer 12 is two layers, the knitting layer material adjacent to the inner liner layer 11 is filament fiber of polyamide or ultra-high molecular polyethylene, preferably ultra-high molecular polyethylene, the outer layer knitting layer yarn bundle is filament fiber of aromatic polyamide or ultra-high molecular polyethylene, preferably para-aramid, when the reinforcing layer 12 is multiple layers, the knitting layer material close to the inner liner layer 11 is filament fiber of polyamide or ultra-high molecular polyethylene, preferably ultra-high molecular polyethylene, the yarn bundles of other outer layer reinforcing layers are filament fiber of aromatic polyamide or ultra-high molecular polyethylene, preferably para-aramid, and the knitting layer close to the inner liner layer 11 is finer than the knitting layer relative to the outer layer, i.e. the yarn bundles are finer and have more knitting strands, and are knitted by using yarn bundles with larger twist, the structure ensures that the breaking elongation of the innermost layer knitting yarn bundle fiber is larger than that of other outer layers, thus, the inner braided layer has a larger adaptive range in the aspect of sharing tensile load with the outer braided layer when the balloon body is expanded; the knitting layer at the outer layer relative to the inner knitting layer is knitted by using thicker yarn bundles with low twist or no twist, so that the knitting layer has higher tensile strength and smaller elastic elongation; at the initial stage of pressure increase in the balloon, the outer braided layer can increase the inner diameter by increasing the braiding angle to adapt to radial expansion of the balloon body, but because the fiber bundles are mutually crossed to form braiding resistance, when the braiding angle is larger than a certain limit value (usually between 55 degrees and 60 degrees), the diameter of the outer braided layer also reaches a certain maximum value, and when the internal pressure continues to rise, the inner braided layer and the inner liner layer are not obviously changed, so that the inner braided layer and the inner liner layer can be protected under higher pressure.

In a further optimized scheme, the materials of the inner container layer 11 and the outer protective layer 13 are high molecular polymers with shore hardness of 80HA to 90HA and elastic elongation of more than 300%, and the materials are thermoplastic polyurethane elastomers (TPU) or nitrile rubbers, preferably polyurethane elastomers (TPU).

Further optimization scheme, it has an annular boss 26 to chew on the body 21 insertion section, fine ring 22 of lock embolias from the outer end of chewing the body 21, be stopped by boss 26, press the lock of inner bag layer 11 tip and fibre weaving layer on chewing the body 21, pass the fine ring 22 of lock fibre weaving layer tail section from fine ring of lock outside the reverse cover turn back, including the fine ring of lock is wrapped and draw to boss 26 side, sleeve 23 entangles fine ring 22 of lock and the fibre weaving layer of wrapping fine ring of lock, compress tightly inner bag layer 11 tip and the insertion section outer wall of chewing the body 21, it has lock nut 28 to chew external end threaded connection, can lock sleeve 23 and chew body 21. The combination of the bag mouth 2 and the bag body 1 is a self-locking structure which can be disassembled and assembled, and compared with the traditional one-time buckling and pressing mode, the self-locking structure is more convenient for technical personnel to inspect, maintain and replace parts. When the pressure of the liquid in the bladder is increased, the force of the nozzle body 21 inserted into the cavity of the inner bladder, which is pressed outwards by the liquid, is increased, meanwhile, the expansion of the bladder body causes the fiber of the reinforcing layer 12 to be tensioned, the force of the fiber braided layer surrounding the fiber locking ring and tensioning the fiber locking ring 22 inwards is also increased, and the force of the fiber locking ring 22 and the boss 26 for locking and pressing the end part of the inner bladder layer 11 is correspondingly increased, so that the dynamic sealing effect of 'the pressure is higher and the seal is tighter' is achieved. When the device is used, the sac nozzle 2 at one end of the sac body is connected with a hydraulic pipeline, and the other end of the sac body can be connected with a seal head or a safety valve.

According to a further optimization scheme, the tail section part of the fiber braided layer folded back from the fiber locking ring in a reverse sleeving mode is soaked by epoxy resin before the fiber braided layer is sleeved into the sleeve, and the anti-slipping reliability can be improved after the fiber braided layer is cured.

In a further optimized scheme, an annular convex outer conical surface 28 is arranged on the nozzle body 21 and is positioned between the annular boss 26 and the threads, and a circular hole in the bottom of the sleeve 23 is provided with an inner conical surface matched with the circular hole, so that the sleeve 23 can be limited, and the damage to the end part of the inner container layer caused by excessive extrusion between the inner bottom surface and the side surface of the boss 26 when the sleeve 23 is pressed inwards is avoided.

in one embodiment of the tubular hydraulic bladder, as shown in fig. 2-3, the inner bladder layer 11 of the bladder body 1 is made of thermoplastic polyurethane elastomer rubber (TPU) flat belt tube with a wall thickness of 1.5 mm and a width of 28 mm, and the material shore hardness is 85 HA; the reinforcing layer 12 is two layers of fiber braided layers, the inner layer is braided by 120 spindle 0.5 mm wire diameter ultra-high molecular polyethylene twisted strand yarn, and the outer layer is braided by 32 spindle 1.5 mm wire diameter para-position aramid fiber untwisted yarn bundle; the outer sheath 13 is 1 mm thick TPU. The width of the capsule body 1 when the capsule body is naturally flat without bearing pressure is 36 mm, the thickness is 12 mm, and the length is about 1 m. The bag mouth adopts two fiber locking rings and an inner sleeve and an outer sleeve to respectively lock and press the inner layer fiber woven layer and the outer layer fiber woven layer (as shown in figure 2), so that the two layers of fiber woven layers can be adjusted to share the tensile load in a balanced manner. Referring to fig. 4, in the no-load test, when the applied hydraulic pressure is increased to about 20MPa, the outer diameter of the expanded balloon reaches a maximum of 31 mm, no visible significant change is observed with the increase in pressure, and the minimum burst pressure is 63 MPa; in the loading experiment, when the hydraulic pressure is 30MPa, the flat pressing block of the uniaxial pressure tester is used to compress the cylindrical expansion section with the length of 100 mm to the thickness of 24 mm, namely, twice the initial flat thickness, and the pressure displayed by the tester is 33KN (as shown in figure 3).

the tubular hydraulic bag can be used as a flexible bidirectional energy conversion element to be applied to hydraulic machinery, wherein the bidirectional energy conversion means that high-pressure fluid medium is injected into the bag body 1 through a pipeline to radially expand the bag body against external load resistance, hydraulic energy is converted into mechanical energy to do work outwards, mechanical external force can be applied to the expanded bag body 1 to force the bag body 1 to contract or collapse, so that the pressure of fluid in the bag body and the pipeline connected with the bag body is increased, and the mechanical energy is converted into the pressure potential energy of the fluid.

A pressure generating device driven by a tubular hydraulic bladder comprises an upper plate 3 and a lower plate 4, at least one tubular hydraulic bladder being provided between the upper plate 3 and the lower plate 4.

pressure generating device embodiment 1, as shown with reference to fig. 4-5, a tubular hydraulic bladder is provided between upper plate 3 and lower plate 4. In this embodiment, the upper plate 3 and the lower plate 4 are both provided with arc-shaped inner concave surfaces to form the capsule grooves 5, and the material of the capsule grooves is a spring steel plate which is formed by quenching. The grooves of the upper plate 3 and the lower plate 4 are oppositely spliced to form a cylindrical shell, the tubular hydraulic bag 1 is arranged in the cylindrical shell, and the two ends of the shell clamp the sleeve outside the bag mouth and are fixed by steel sleeves. A liner body 6 is respectively arranged in the arc-shaped bag grooves 5 of the upper plate 3 and the lower plate 4, the liner body 6 is made of hard plastic or metal material, and hard PA6 nylon material is adopted in the embodiment. The back of the liner body 6 is attached to the arc surface of the bag groove 5, the front surface is in an arc concave-convex wave shape, the concave and convex of the upper liner body 6 and the concave and convex of the lower liner body 6 are complementary and opposite, and the flat belt-shaped bag body is clamped and extruded into a curved wave shape (as shown in figure 4 a). One suitable application of this embodiment is to use the device in a fracturing device, the cuff at one end is plugged with a blind cap, the other cuff is connected with a hydraulic pipeline of the device, and the hydraulic pipeline is inserted into a rock drill hole or embedded in a concrete body, and when the hydraulic pipeline is pressurized, the rock or the concrete body can be fractured by huge pressure generated by expansion of the bladder (as shown in fig. 5). The wavy curve of utricule lays than the straight line advantage of laying: when the bag body 1 is expanded, the fiber woven layer in the reinforcing layer 12 can be axially shortened to a certain extent due to radial stretching, if the bag body is linearly arranged, two ends of the bag body can be pulled to the middle to slide and displace, and the wave-shaped curve cloth is set as the bag body to reserve length allowance for contraction, so that the tendency that the two ends of the bag body slide to the middle when the bag body is expanded can be eliminated or weakened, the risk that a bag mouth is pulled off and a bag wall is abraded is reduced, on the other hand, after a rock is expanded to form a crack, the resistance is reduced, when the bag body is further expanded to a circle, the bag body can be straightened and the rigidity is increased, and the protruding parts of lining objects on two sides can be pressed to increase the range of pushing the upper plate 3 and the lower plate 4 to be far away. The upper and lower plates made of spring steel are bent and deformed when opened, and the upper and lower plates are automatically restored to the original state (as shown in fig. 4) by elastic stress after the capsule body 1 is relieved of pressure, so that the capsule can be repeatedly used.

In one embodiment of the pressure generating device, referring to fig. 6-8, a plurality of tubular hydraulic bags are arranged between an upper plate 3 and a lower plate 4, each hydraulic bag is provided with a bag groove 5 for supporting and positioning, the bag grooves 5 are arranged in parallel and are arranged closely, the corresponding bag grooves 5 on the lower surface of the upper plate 3 and the upper surface of the lower plate 4 are aligned with each other, the back surfaces of the bag grooves 5 are tightly attached to the plate surface and are fixed by screws, and two ends of each tubular hydraulic bag are fixed with the lower plate 3 or the lower plate 4 by screws through pipe clamps 7 (not shown). Each tubular hydraulic bag is connected to a hydraulic source through a hydraulic pipeline, the hydraulic source can be a hydraulic press or a hydraulic station in the existing equipment, fluid pressure media are simultaneously injected into each bag body 1 by the hydraulic source, so that the upper and lower rows of tubular hydraulic bags synchronously expand from flat to round to form a pressure action surface with a large area, huge pressure equivalent to a hydraulic cylinder with an ultra-large diameter can be output, the upper plate 3 or the lower plate 4 is pushed to overcome load resistance, and work displacement is generated. In this embodiment, there are two sets of upper plates and lower plates in pairs, each plate is overlapped from top to bottom, there are several openings facing from top to bottom on both sides, several upright posts 8 penetrate vertically therein, and the upright posts 8 are provided with return springs 9 for closing the upper and lower plates. The lower plate 4 of the lower set is typically a fixed base table, the upper plate 3 of the upper set is typically fixed to the bottom of the top beam or slide of the press, and the intermediate upper and lower plates 3, 4 are slidable in a vertical direction along the vertical column 8, between which the object or mold to be pressed is placed.

in another embodiment of the pressure generating device, referring to fig. 8, the corresponding bladder grooves 5 between the upper plate 3 and the lower plate 4 are arranged in an inserting manner, that is, the left and right sides are staggered by 1/2 of the width of the bladder grooves to be aligned, and compared with the opposite arrangement, the inserting arrangement can obtain a larger hydraulic acting area under the same condition, so that a larger mechanical pressure can be output, but the effective working stroke can be slightly reduced, and the selection can be performed according to the requirements of working conditions in specific application.

In a further optimized scheme, as shown in fig. 7-8, the lining bodies 6 are arranged in the bladder groove 5 and between the upper and lower corresponding bladder bodies, the lining bodies 6 should have certain elasticity, and the shape, thickness and elastic modulus of the lining bodies should be selected according to the corresponding pressure grade.

compared with the traditional full hydraulic cylinder type pressure generating device, the tubular hydraulic bag driven pressure generating device provided by the invention is more convenient to install and maintain on the premise of meeting the application requirement of large tonnage and small stroke, can effectively reduce the volume and weight of equipment, reduces the manufacturing and using cost, and is applicable to both oil pressure and water pressure.

in the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.