CN110332404B

CN110332404B - Pressure compensator

Info

Publication number: CN110332404B
Application number: CN201910731938.3A
Authority: CN
Inventors: 钱忠平; 钱芬; 周云飞; 刘强; 张家林
Original assignee: Berg Dongjin Pipe Line Equipment Jiangsu Co ltd
Current assignee: Jiangsu Borg Dongjin Pipeline Equipment Co ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2021-01-29
Anticipated expiration: 2039-08-09
Also published as: CN110332404A

Abstract

The invention belongs to the technical field of compensators, and particularly relates to a pressure compensator which comprises a body, wherein the body comprises a corrugated pipe and a connecting seat; an annular groove is formed between every two adjacent corrugations on the corrugated pipe, and a plurality of threaded holes are formed in the connecting seat; the outer ring of the body is provided with a steering knuckle, a screw rod, a ball seat and a rubber pad; the steering knuckle is connected to the body, and two ends of the steering knuckle are respectively connected with a lead screw; the lead screw is connected to the knuckle through a bearing, a plurality of sections of ropes are uniformly wound on the lead screw, a ball seat is arranged at one end of the lead screw, which is close to the connecting seat, and the ball seat is fixedly connected to the connecting seat; the rubber pad is clamped in the annular groove, two ends of the rubber pad are fixedly connected with one end of each of two ropes, and the other ends of the two ropes are wound on the screw rod respectively; under the cooperation of the steering knuckle, the screw rod and the rubber pad, the rubber pad buffers the axial pressure.

Description

Pressure compensator

Technical Field

The invention belongs to the technical field of compensators, and particularly relates to a pressure compensator.

Background

The compensator is also called expansion joint or expansion joint conventionally, and consists of a corrugated pipe and accessories such as end pipes, a bracket, a flange, a conduit and the like which form a working main body of the compensator, and belongs to a compensation element; the effective telescopic deformation of the working main body corrugated pipe is utilized to absorb the dimensional change of pipelines, conduits, containers and the like caused by expansion with heat and contraction with cold or compensate the axial, transverse and angular displacement of the pipelines, conduits, containers and the like; can also be used for noise reduction and vibration reduction; has wide application in modern industry; in heat supply, in order to prevent the pipeline from deforming or damaging due to thermal elongation or temperature stress when the heating pipeline is heated, a compensator is required to be arranged on the pipeline to compensate the thermal elongation of the pipeline, so that the stress of the pipeline wall and the acting force acting on a valve or a bracket structure are reduced; traditional pressure compensator, moreover, the steam generator is simple in structure and single in function, one pressure compensator can only compensate one kind of displacement in axial displacement, radial displacement and angular displacement, when the axial displacement, the radial displacement and the angular displacement are generated in work, the pressure compensator can only be eliminated by matching with a plurality of compensators, inconvenience is brought to work production, meanwhile, the production working cost is increased, benefits are reduced, and the traditional pressure compensator can not effectively counteract destructive force generated by the axial displacement, the radial displacement and the angular displacement, so that the pressure compensator is easily damaged, the maintenance times of workers are increased, and the frequency of the pressure compensator which is updated is increased, the production working cost is increased as a final result, and the benefits are reduced.

Disclosure of Invention

The invention provides a pressure compensator, which aims to make up the defects of the prior art and solve the problems that the traditional pressure compensator is simple in structure and single in function and cannot effectively buffer destructive force generated by axial, radial and angular displacements.

The technical scheme adopted by the invention for solving the technical problems is as follows: a pressure compensator comprising a body; the body comprises a corrugated pipe and a connecting seat; an annular groove is formed between every two adjacent corrugations on the corrugated pipe, and two ends of the corrugated pipe are fixedly connected with connecting seats respectively; a plurality of threaded holes are formed in the connecting seat; the outer ring of the body is provided with a steering knuckle, a screw rod, a ball seat and a rubber pad; the center part of the steering knuckle is connected to the middle position of the body, the cross section of the steering knuckle is oval, and two ends of the steering knuckle are respectively connected with a lead screw; the lead screw is connected to the steering knuckle through a bearing, a plurality of sections of ropes are uniformly wound on the lead screw, and a ball seat is arranged at one end of the lead screw, which is close to the connecting seat; the ball seat is fixedly connected to the connecting seat; the section of the rubber pad is C-shaped, the rubber pad is clamped in the annular groove, two ends of the rubber pad are fixedly connected with one end of each of two ropes, and the other ends of the two ropes are wound on the screw rod respectively; the rubber pad buffers axial pressure under the matching of the steering knuckle, the screw rod and the rubber pad; when the corrugated pipe works, the connecting seats at the two ends of the body are respectively connected with an oil conveying pipeline through bolts, when oil flows through the oil conveying pipeline, the oil has impact force on the oil conveying pipeline, the oil conveying pipeline at the two ends of the body can extrude the body, the distance between the connecting seats at the two ends of the body is gradually reduced, the distance between the ball seats is also gradually reduced, the connecting seats are subjected to inward axial pressure, the axial pressure is transmitted to the lead screw, the lead screw starts to rotate under the cooperation of the ball seats, the outer ring of the lead screw starts to wind the rope while the lead screw rotates, the rope is slowly tensioned, then the rope pulls the rubber pad, the rubber pad is slowly pulled into the annular groove of the body, the rubber pad is tightly pressed into the annular groove by the two corrugations, the corrugations on the corrugated pipe can play a role of buffering the axial pressure, and the rubber pad in the annular groove is added, so that, after the axial force disappears, the rubber pad will extrude the annular groove both sides because of elasticity reason for distance between the connecting seat grow gradually, and distance between the ball seat also grow gradually simultaneously, the lead screw just begins the reversal, loosens the rope, and original position and state are withdrawn to the rubber pad, and initial condition just also is got back to corrugated pipe, under the effect of rubber pad, has increased the compressive capacity of body to axial pressure.

Preferably, the lead screw is connected with one end of the ball seat and is provided with a bulge; the bulge is fixedly connected to the lead screw and close to the top end of the connecting seat, the bulge is hemispherical, and the radius of the bulge is larger than that of a lead screw shaft; when the device works, when the body is subjected to the force of pulling the body in the axial direction of an oil pipeline, the distance between the ball seats is gradually increased, the lead screw rotates under the matching of the ball seats, the bulge at the top end of the lead screw is gradually far away from the connecting seat and close to the ball seats, and when the bulge is tightly attached to and extruded on the side surface of the ball seats, the distance between the connecting seats is not increased any more, so that the axial tension is buffered; the bellows on the body can resist axial tension by itself, and in addition, the bulge on the lead screw bears a part of axial tension, so that the resistance of the body to the axial tension is increased.

Preferably, two sides of the screw rod are respectively provided with a support rod; the section of the support rod is L-shaped, the vertical end of the support rod is hinged to the nearest connecting seat, and the horizontal end of the support rod is propped against the other connecting seat; during operation, when the body received axial pressure, the arch was close to the connecting seat gradually and was kept away from the ball seat, the bracing piece was hugged closely and is extruded to the arch at last, the protruding vertical end of extrusion bracing piece, the bracing piece other end is hugged closely and is extruded the connecting seat, bracing piece theory of operation is the same with seesaw theory of operation, press the vertical end of bracing piece, the connecting seat just is extruded to the bracing piece horizontal segment, two connecting seats on the bellows are just being supported to the reverse of pressure by the bracing piece, the ability that the body axial resisted pressure at this moment increases once more, just also can resist bigger axial pressure.

Preferably, each lead screw is hinged to the steering knuckle through a first torsion spring; one end of the first torsion spring is fixedly connected to the screw rod, and the other end of the first torsion spring is fixedly connected to the steering knuckle; the during operation, the body is installed to oil pipeline turning accessory, when having the oil to flow through oil pipeline, the impact force of oil makes the body crooked, lead screw on the body is under the effect of bending force, the lead screw rotates around its pin joint, the torsional spring of articulated department just resists bending force, wherein there is the existence of bellows on the body to make the body offset some bending force, in addition the torsion of a torsional spring can offset remaining bending force, treat that the oil impact force disappears the back, a torsional spring makes the body slowly resume the original state, thereby the body is difficult to be damaged, reduce maintenance number of times and cost, the life of extension body.

Preferably, the steering knuckle is hinged to the body through a second torsion spring; one end of the second torsion spring is fixedly connected with the steering knuckle; during operation, oil pipeline receives external interference, takes place radial displacement between the oil pipeline at body both ends, and radial skew also takes place for the body intermediate position, and the body just makes the knuckle take place to rotate around its pin joint, and under the effect of No. two torsional springs, the torsion of No. two torsional springs offsets the shearing destructive power that produces by radial displacement for the body keeps original state work, thereby the body is difficult for taking place to damage, reduces maintenance number of times and cost, prolongs the life of body.

Preferably, the second torsion spring is made of an oil-quenched tempered silicon-manganese spring steel wire material, and the wire diameter of the second torsion spring is 3 CM; during operation, the knuckle on the body is made to oil pipeline radial displacement at body both ends makes, is being made by oil quenching tempering silicon manganese spring steel wire, and under the torsion of No. two torsional springs that the line footpath is 3CM, just can turn round the knuckle back to reset to resist the power that the radial skew of body produced, make the body resume initial condition, the body is difficult to be damaged, reduces maintenance number of times and cost, the life of extension body.

The invention has the following beneficial effects:

1. according to the pressure compensator, the screw rod, the rubber pad, the steering knuckle and the first torsion spring and the second torsion spring are matched, so that destructive force generated by axial, radial and angular displacement can be effectively buffered, the body is not easy to damage, and the service life of the body is prolonged.

2. According to the pressure compensator disclosed by the invention, the rubber pad is clamped in the annular groove, so that the fatigue degree of the corrugated pipe when the corrugated pipe is extruded by axial pressure can be effectively relieved, the deformation degree of the corrugated pipe can be effectively controlled by the protrusion, the bending degree of the corrugated pipe can be effectively weakened by the first torsion spring, and the shearing destructive force generated by radial deviation of the body can be effectively resisted by the second torsion spring.

Drawings

The invention is further described with reference to the following figures and embodiments.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a cross-sectional view of the present invention;

in the figure: the corrugated pipe comprises a body 1, a corrugated pipe 12, an annular groove 121, a connecting seat 13, a threaded hole 131, a steering knuckle 14, a second torsion spring 141, a lead screw 15, a protrusion 151, a supporting rod 152, a first torsion spring 153, a ball seat 16 and a rubber pad 17.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the following embodiments.

As shown in fig. 1 to 3, the technical solution adopted by the present invention to solve the technical problem is: a pressure compensator comprising a body 1; the body 1 comprises a corrugated pipe 12 and a connecting seat 13; an annular groove 121 is formed between every two adjacent corrugations on the corrugated pipe 12, and two ends of the corrugated pipe 12 are fixedly connected with the connecting seats 13 respectively; a plurality of threaded holes 131 are formed in the connecting seat 13; a steering knuckle 14, a screw rod 15, a ball seat 16 and a rubber pad 17 are arranged on the outer ring of the body 1; the central part of the steering knuckle 14 is connected to the middle position of the body 1, the cross section of the steering knuckle 14 is oval, and two ends of the steering knuckle 14 are respectively connected with a screw rod 15; the lead screw 15 is connected to the steering knuckle 14 through a bearing, a plurality of sections of ropes are uniformly wound on the lead screw 15, and a ball seat 16 is arranged at one end of the lead screw 15, which is close to the connecting seat 13; the ball seat 16 is fixedly connected to the connecting seat 13; the section of the rubber pad 17 is C-shaped, the rubber pad 17 is clamped in the annular groove 121, two ends of the rubber pad 17 are fixedly connected with one end of each of two ropes, and the other ends of the two ropes are wound on the screw rod 15; the rubber pad 17 buffers the axial pressure under the matching among the steering knuckle 14, the screw rod 15 and the rubber pad 17; when the oil conveying device works, the connecting seats 13 at the two ends of the body 1 are respectively connected with an oil conveying pipeline through bolts, when oil flows through the oil conveying pipeline, the oil has impact force on the oil conveying pipeline, the oil conveying pipeline at the two ends of the body 1 can extrude the body 1, the distance between the connecting seats 13 at the two ends of the body 1 is gradually reduced, the distance between the ball seats 16 is also gradually reduced, the connecting seats 13 are subjected to inward axial pressure, the axial pressure is transmitted to the lead screw 15, then the lead screw 15 starts to rotate under the matching of the ball seats 16, the outer ring of the lead screw 15 starts to wind a rope while the lead screw 15 rotates, the rope is slowly strained, then the rubber pad 17 is pulled by the rope, the rubber pad 17 is slowly pulled into the annular groove 121 of the body 1, at the moment, the rubber pad 17 is tightly pressed into the annular groove 121 by two corrugations, the corrugated pipe 12 on the body, in addition, the rubber pads 17 in the annular groove 121 improve the pressure resistance of the body 1, after the axial force disappears, the rubber pads 17 extrude the two sides of the annular groove 121 due to elasticity, so that the distance between the connecting seats 13 gradually increases, the distance between the ball seats 16 gradually increases, the screw 15 starts to rotate reversely, the rope is loosened, the rubber pads 17 withdraw to the original position and state, the bellows 12 returns to the initial state, and under the action of the rubber pads 17, the pressure resistance of the body 1 to the axial pressure is improved.

As a specific embodiment of the present invention, the end of the lead screw 15 connected to the ball seat 16 is provided with a protrusion 151; the bulge 151 is fixedly connected to the top end, close to the connecting seat 13, of the lead screw 15, the bulge 151 is hemispherical, and the radius of the bulge 151 is larger than the axial radius of the lead screw 15; when the device works, when the body 1 is subjected to the force of pulling the body 1 in the axial direction of an oil pipeline, the distance between the ball seats 16 is gradually increased, the lead screw 15 rotates under the matching of the lead screw 15 and the lead screw 15, the bulge 151 at the top end of the lead screw 15 is gradually far away from the connecting seat 13 and close to the ball seats 16, when the bulge 151 is tightly attached to and extruded on the side surface of the ball seat 16, the distance between the connecting seats 13 is not increased, the body 1 is not elongated any more, and the axial tension is buffered; the bellows 12 of the body 1 can resist axial tension by itself, and the bulge 151 of the screw 15 bears a part of axial tension, so that the resistance of the body 1 to the axial tension is increased.

As a specific embodiment of the present invention, two sides of the lead screw 15 are respectively provided with a support rod 152; the section of the support rod 152 is L-shaped, the vertical end of the support rod 152 is hinged to the nearest connecting seat 13, and the horizontal end of the support rod 152 is propped against the other connecting seat 13; during operation, body 1 receives axial pressure, protruding 151 is close to connecting seat 13 gradually and keeps away from ball seat 16, protruding 151 is hugged closely and is extrudeed the bracing piece 152 at last, protruding 151 extrudees the vertical end of bracing piece 152, the bracing piece 152 other end is hugged closely and is extrudeed connecting seat 13, bracing piece 152 theory of operation is the same with seesaw theory of operation, press the vertical end of bracing piece 152, bracing piece 152 horizontal segment just extrudees connecting seat 13, two connecting seats 13 on the bellows 12 are just being supported to the reverse of pressure by bracing piece 152, the ability that body 1 axial resisted pressure increases once more this moment, just can resist bigger axial pressure.

As a specific embodiment of the present invention, each of the lead screws 15 is hinged on the knuckle 14 by a torsion spring 153; one end of the first torsion spring 153 is fixedly connected to the screw rod 15, and the other end of the first torsion spring 153 is fixedly connected to the knuckle 14; during operation, near oil pipeline turning installs body 1, when having the oil to flow through oil pipeline, the impact force of oil makes body 1 crooked, lead screw 15 on the body 1 is under the effect of bending force, lead screw 15 rotates around its pin joint, torsional spring 153 of articulated department just resists the bending force, wherein there is bellows 12 existence on the body 1 to make body 1 offset the bending force, in addition a torsional spring 153's torsion can weaken the bending force, treat the oil impact force disappearance back, torsional spring 153 makes body 1 slowly resume the original state, thereby body 1 is difficult to be damaged, reduce maintenance number of times and cost, prolong body 1's life.

As a specific embodiment of the present invention, the knuckle 14 is hinged on the body 1 through a second torsion spring 141; one end of the second torsion spring 141 is connected with the body 1, and the other end of the second torsion spring 141 is fixedly connected with the steering knuckle 14; during operation, oil pipeline receives external interference, take place radial displacement between the oil pipeline at 1 both ends of body, radial skew also takes place for 1 intermediate position of body, body 1 just makes knuckle 14 take place to rotate around its pin joint, under No. two torsional springs 141's effect, No. two torsional springs 141's torsion weakens the shearing destructive power that produces by radial displacement, make body 1 keep original state work, thereby body 1 is difficult for taking place to damage, reduce maintenance number of times and cost, prolong body 1's life.

As a specific embodiment of the present invention, the second torsion spring 141 is made of an oil-quenched tempered silicon manganese spring steel wire material, and the wire diameter of the second torsion spring 141 is 3 CM; during operation, the oil pipeline radial displacement at body 1 both ends makes knuckle 14 on the body 1 take place to rotate, is being made by oil quenching tempering silicomanganese spring steel wire, and the line footpath is under 3 CM's the torsion of No. two torsional springs 141, just can turn back knuckle 14 and reset to weaken the power that body 1 radial offset produced, make body 1 resume initial condition, body 1 is difficult for being damaged, reduces maintenance number of times and cost, extension body 1's life.

When the device works, the connecting seats 13 at the two ends of the body 1 are respectively connected with an oil pipeline through bolts, when oil flows through the oil pipeline, the oil has impact force on the oil pipeline, the oil pipeline at the two ends of the body 1 can extrude the body 1, the distance between the connecting seats 13 at the two ends of the body 1 is gradually reduced, the distance between the ball seats 16 is also gradually reduced, the connecting seats 13 receive inward axial pressure, the axial pressure is transmitted to the lead screw 15, then the lead screw 15 starts to rotate under the matching of the ball seats 16, the outer ring of the lead screw 15 starts to wind a rope while the lead screw 15 rotates, the rope is slowly strained, then the rubber pad 17 is pulled by the rope, the rubber pad 17 is slowly pulled into the annular groove 121 of the body 1, at the moment, the rubber pad 17 is tightly pressed on the annular groove 121 by two corrugations, the corrugations on the corrugated pipe 12 can play a role of buffering the, the rubber pads 17 in the annular groove 121 improve the compression resistance of the body 1, after the axial force disappears, due to the elasticity of the rubber pads 17, the rubber pads 17 extrude the two sides of the annular groove 121, the distance between the connecting seats 13 is gradually increased, the distance between the ball seats 16 is also gradually increased, the screw 15 starts to rotate reversely, the rope is loosened, the rubber pads 17 withdraw to the original position and state, the corrugated pipe 12 returns to the original state, and the compression resistance of the body 1 to the axial pressure is improved under the action of the rubber pads 17; when the body 1 is subjected to the force of pulling the body 1 in the axial direction of an oil pipeline, the distance between the ball seats 16 is gradually increased, the lead screw 15 rotates under the matching of the lead screw 15 and the ball seats 16, the protrusion 151 at the top end of the lead screw 15 is gradually far away from the connecting seat 13 and close to the ball seats 16, when the protrusion 151 is tightly attached to and extruded on the side surface of the ball seats 16, the distance between the connecting seats 13 is not increased, and the axial tension is buffered; the corrugated pipe 12 on the body 1 can resist axial tension, and the bulge 151 on the lead screw 15 bears a part of axial tension, so that the resistance of the body 1 to the axial tension is increased; when the body 1 is subjected to axial pressure, the protrusion 151 is gradually close to the connecting seat 13 and far away from the ball seat 16, finally, the protrusion 151 is tightly attached to and extrudes the supporting rod 152, the protrusion 151 extrudes the vertical end of the supporting rod 152, the other end of the supporting rod 152 is tightly attached to and extrudes the connecting seat 13, the working principle of the supporting rod 152 is the same as that of a seesaw, the vertical end of the supporting rod 152 is pressed, the horizontal section of the supporting rod 152 extrudes the connecting seat 13, the two connecting seats 13 on the corrugated pipe 12 are reversely supported by the supporting rod 152 towards the pressure, and at the moment, the axial pressure resistance of the body 1 is increased again; the body 1 is arranged near the corner turning of the oil pipeline, when oil flows through the oil pipeline, the impact force of the oil causes the body 1 to be bent, the lead screw 15 on the body 1 rotates around the hinged point of the lead screw 15 under the action of the bending force, and the first torsion spring 153 at the hinged position resists the bending force, wherein the corrugated pipe 12 on the body 1 causes the body 1 to offset a part of the bending force, the torsion force of the first torsion spring 153 can offset the rest bending force, after the impact force of the oil disappears, the first torsion spring 153 causes the body 1 to slowly recover the original shape, so that the body 1 is not easy to be damaged, the maintenance frequency and the cost are reduced, and the service life of the body 1 is prolonged; the oil pipelines are interfered by the outside, the oil pipelines at two ends of the body 1 are radially displaced, the middle position of the body 1 is radially offset, the steering knuckle 14 is enabled to rotate around a hinge point of the steering knuckle 1 by the body 1, and under the action of the second torsion spring 141, the torsion of the second torsion spring 141 counteracts the shearing destructive force generated by the radial displacement, so that the body 1 keeps the original state to work, the body 1 is not easily damaged, the maintenance frequency and cost are reduced, and the service life of the body 1 is prolonged; the oil pipeline radial displacement at body 1 both ends makes knuckle 14 on the body 1 take place to rotate, is being made by oil quenching tempering silicomanganese spring steel wire, and the line footpath is under the torsion of No. two torsional springs 141 of 3CM, just can turn round knuckle 14 back to reseing to resist the shearing destructive power that body 1 radial excursion produced, make body 1 resume initial condition, body 1 is difficult to be damaged, reduce maintenance frequency and cost, extension body 1's life.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A pressure compensator comprising a body (1); the body (1) comprises a corrugated pipe (12) and a connecting seat (13); an annular groove (121) is formed between every two adjacent corrugations on the corrugated pipe (12), and two ends of the corrugated pipe (12) are fixedly connected with connecting seats (13) respectively; a plurality of threaded holes (131) are formed in the connecting seat (13); the method is characterized in that: a steering knuckle (14), a screw rod (15), a ball seat (16) and a rubber pad (17) are arranged on the outer ring of the body (1); the central part of the steering knuckle (14) is connected to the middle position of the body (1), the cross section of the steering knuckle (14) is oval, and two ends of the steering knuckle (14) are respectively connected with a lead screw (15); the lead screw (15) is connected to the steering knuckle (14) through a bearing, a plurality of sections of ropes are uniformly wound on the lead screw (15), and a ball seat (16) is arranged at one end of the lead screw (15) close to the connecting seat (13); the ball seat (16) is fixedly connected on the connecting seat (13); the section of the rubber pad (17) is C-shaped, the rubber pad (17) is clamped in the annular groove (121), two ends of the rubber pad (17) are fixedly connected with one end of each of two ropes, and the other ends of the two ropes are wound on the screw rod (15) respectively; the rubber pad (17) buffers axial pressure under the matching of the steering knuckle (14), the screw rod (15) and the rubber pad (17).

2. A pressure compensator as set forth in claim 1, wherein: a bulge (151) is arranged at one end of the lead screw (15) connected with the ball seat (16); the bulge (151) is fixedly connected to the top end, close to the connecting seat (13), of the lead screw (15), the bulge (151) is hemispherical, and the radius of the bulge (151) is larger than the radius of the shaft of the lead screw (15).

3. A pressure compensator according to claim 2, wherein: two sides of the screw rod (15) are respectively provided with a support rod (152); the section of the supporting rod (152) is L-shaped, the vertical end of the supporting rod (152) is hinged to the nearest connecting seat (13), and the horizontal end of the supporting rod (152) is propped against the other connecting seat (13).

4. A pressure compensator according to claim 3, wherein: each lead screw (15) is hinged on a steering knuckle (14) through a first torsion spring (153); one end of the first torsion spring (153) is fixedly connected to the screw rod (15), and the other end of the first torsion spring (153) is fixedly connected to the steering knuckle (14).

5. A pressure compensator according to claim 4, wherein: the steering knuckle (14) is hinged to the body (1) through a second torsion spring (141); one end of the second torsion spring (141) is fixedly connected to the body (1), and the other end of the second torsion spring (141) is fixedly connected to the steering knuckle (14).

6. A pressure compensator according to claim 5, wherein: the second torsion spring (141) is made of an oil quenching tempered silicon manganese spring steel wire material, and the wire diameter of the second torsion spring (141) is 3 CM.