Hydraulic stretcher protection structure

Abstract

The utility model relates to a hydraulic stretcher protection structure which comprises a hydraulic stretcher body and further comprises an annular protection cover, a plurality of pairs of screws are connected to the annular protection cover in a threaded mode, and the annular protection cover is arranged outside the hydraulic stretcher body in a sleeving mode and abuts against the surface of the hydraulic stretcher body through the screws to be fixed. A driving structure is further arranged on the annular protection cover, through reliable blocking of the protection structure, damage of high-pressure oil is greatly reduced, and unnecessary personal injury is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of hydraulic stretcher protection structure, belong to the stretching device protection technical field. BACKGROUND

[0002] Currently, high-pressure equipment is the key equipment of chemical plant in chemical plant, and the maintenance of high-pressure equipment and the integrity of each sealing point are crucial for the continuous and stable operation of chemical process equipment. The disassembly and assembly of manhole of high-pressure equipment is the key to the success or failure of the whole maintenance, so high requirements are put forward for the disassembly and assembly of manhole bolts. The tightening torque of each installed bolt must be consistent to ensure uniform sealing gap and consistent pre-tightening force of each bolt on the sealing gasket. In order to ensure that the tightening torque of each bolt on the manhole is consistent, maintenance usually uses hydraulic stretcher, which makes the tightening torque of manhole bolt more accurate, the flange gap more uniform, the gasket force more consistent and the sealing more reliable.

[0003] However, with the increase of use time, the pipeline joint and each connection part of the hydraulic stretcher may leak. If leakage occurs during operation, 1250KG working pressure may be ejected outward, which may cause serious injury to the operator. UTILITY MODEL CONTENT

[0004] To solve the above problems existing in the prior art, the utility model provides a hydraulic stretcher protection structure, which can greatly reduce the harm of high-pressure oil and reduce unnecessary personnel injury through the reliable blocking of the protection structure.

[0005] The technical scheme of the utility model is as follows:

[0006] A hydraulic stretcher protection structure includes a hydraulic stretcher body, an annular protective cover, a plurality of pairs of screw rods threadedly connected to the annular protective cover, and a driving structure. The annular protective cover is sleeved outside the hydraulic stretcher body and fixed to the surface of the hydraulic stretcher body by the screw rods. The driving structure is used to assist the screw rods to be screwed to the surface of the hydraulic stretcher body.

[0007] The driving structure includes an annular sliding cylinder sleeved outside the annular protective cover, a plurality of slides are formed in the inner surface of the annular sliding cylinder, and the slides are arranged along the height direction of the annular sliding cylinder. The outer part of the screw rod is provided with a gear, the gear is located inside the slide, and a rack is arranged on the wall surface of the slide. The rack is engaged with the gear. The rack is arranged along the height direction of the annular sliding cylinder.

[0008] The metal block is arranged on the side of the screw body facing the hydraulic stretcher body and is arranged in an arc shape in abutment with the surface of the hydraulic stretcher body.

[0009] The metal block comprises a rigid base and a flexible cover body attached to the rigid base, and a space between the rigid base and the flexible cover body is filled with electrorheological fluid.

[0010] The annular protection cover is provided with a plurality of insertion holes, and the insertion rods and the insertion holes are matched.

[0011] The utility model has the advantages of the following beneficial effects:

[0012] The annular protection cover is arranged, so that the high-pressure oil is effectively prevented from being sprayed, thus avoiding personal injury of nearby workers caused by contacting the high-pressure oil and significantly improving the safety during operation.

[0013] Meanwhile, the metal block is arranged, and the electrorheological fluid is deformable in the inactivated state, so that the metal block is deformed to abut the surface of the hydraulic stretcher body when facing hydraulic stretcher bodies of different sizes, and then the electrorheological fluid is activated to keep the relative hardness of the metal block, so that the metal block can be stably abutted on the surface of the hydraulic stretcher body in a solid state, is suitable for hydraulic stretcher bodies of different sizes, and has good abutting effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a partial sectional view of the overall structure of the utility model.

[0015] Fig. 2 It is a sectional view of the metal block of the utility model.

[0016] In the drawing, the reference signs are represented as:

[0017] 1, hydraulic stretcher body; 2, annular protection cover; 3, screw; 4, annular sliding cylinder; 5, slide; 6, gear; 7, rack; 8, metal block; 81, rigid base; 82, flexible cover body; 83, electrorheological fluid. DETAILED DESCRIPTION

[0018] The utility model will be described in detail in combination with the drawings and specific embodiments.

[0019] Please refer to Figs. 1-2 , the utility model provides a technical scheme:

[0020] The utility model provides a kind of hydraulic stretcher protection structure, including hydraulic stretcher body 1, still including annular protective cover 2, several pairs of screw rod 3 are threadedly connected on annular protective cover 2, annular protective cover 2 is sleeved on the outside of hydraulic stretcher body 1 and is fixed by screw rod 3 to the surface of hydraulic stretcher body 1;Specifically, pipeline connection part can also be cut into 200mm section with galvanized pipe of phi 15 and be used as pipeline connection protective cover, the end of galvanized pipe is attacked M10 thread, and M10 screw rod is matched, protective cover is mounted on pipeline connection part before work and is locked by screw rod, to ensure that pipeline part protective cover is fixed reliably;By sleeving annular protective cover 2 on the outside of hydraulic stretcher body 1, then several pairs of screw rod 3 arranged annularly are tightened towards the surface of hydraulic stretcher body 1, so that annular protective cover 2 can be tightly fixed on the surface of hydraulic stretcher body 1;

[0021] As a kind of preferred, annular protective cover 2 is also provided with driving structure, driving structure includes annular slip cylinder 4 sleeved on the outside of annular protective cover 2, the inner surface of annular slip cylinder 4 is annularly provided with several slides 5, and several slides 5 are arranged along the height direction of annular slip cylinder 4;Gear 6 is installed on the outside of screw rod 3, gear 6 is located in the inside of slide 5, and rack 7 is arranged on the wall surface of slide 5, and rack 7 is engaged with gear 6;Rack 7 is arranged along the height direction of annular slip cylinder 4;Specifically, by pushing annular slip cylinder 4 along the height direction of annular slip cylinder 4, at this time, due to the engagement relationship between rack 7 and gear 6, rack 7 slides along with annular slip cylinder 4, which will drive gear 6 to rotate, i.e.

[0022] The metal block 8 is arranged on one side of the screw rod 3 and is arranged in an arc shape on the surface of the hydraulic stretcher body 1, the metal block 8 comprises a rigid base 81 and a flexible cover 82 attached to the rigid base 81, and the space between the rigid base 81 and the flexible cover 82 is filled with the electrorheological fluid 83; an activating device and a controller are further included, the activating device provides an activating signal for the electrorheological fluid, and the controller cooperates with the activating device; when the screw rod 3 is screwed towards the hydraulic stretcher body 1, the metal block 8 is attached to the surface of the hydraulic stretcher body 1 and is deformed under force because the electrorheological fluid 83 is not activated at this time, and then the electrorheological fluid 83 is activated by an external starting button to convert from a liquid state to a solid state, so that the electrorheological fluid 83 can be attached to adapt to the hydraulic stretcher body 1 with different sizes and different arc surfaces and keep stable.

[0023] The working principle of the hydraulic stretcher protection structure is as follows:

[0024] Firstly, the annular sliding cylinder 4 is slid along the height direction, and the rack 7 drives the gear 6 to rotate and moves the screw rod 3 towards the surface of the hydraulic stretcher body 1 due to the meshing relationship between the rack 7 and the gear 6, when the screw rod 3 is screwed towards the hydraulic stretcher body 1, the metal block 8 is attached to the surface of the hydraulic stretcher body 1 and is deformed, and then the electrorheological fluid 83 is activated by the controller to convert from a liquid state to a solid state.

[0025] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process conversion or direct or indirect application in other related technical fields by using the content of the present application specification and drawings is also included in the patent protection range of the present application.

Claims

1. A hydraulic stretcher protection structure comprising a hydraulic stretcher body (1), characterized in that: Also include annular protective cover (2), a number of pairs of screw rod (3) are threaded on the annular protective cover (2), the annular protective cover (2) is sleeved on the outside of the hydraulic stretcher body (1) and is fixed to the surface of the hydraulic stretcher body (1) by the screw rod (3); the annular protective cover (2) is also provided with a driving structure, and the driving structure is used for assisting the screw rod (3) to be screwed on the surface of the hydraulic stretcher body (1), the driving structure comprises an annular sliding cylinder (4) sleeved on the outside of the annular protective cover (2), a plurality of slide ways (5) are radially formed on the inner surface of the annular sliding cylinder (4), and the plurality of slide ways (5) are arranged along the height direction of the annular sliding cylinder (4); the outer portion of the screw rod (3) is provided with a gear (6), the gear (6) is located in the slide way (5), and the wall surface of the slide way (5) is provided with a rack (7), and the rack (7) is engaged with the gear (6); the rack (7) is arranged along the height direction of the annular sliding cylinder (4).

2. A hydraulic stretcher protection arrangement as claimed in claim 1, characterized in that: The side of the screw rod (3) towards the hydraulic stretcher body (1) is provided with a metal block (8), and the metal block (8) is arranged in an arc shape abutting the surface of the hydraulic stretcher body (1).

3. A hydraulic stretcher protection arrangement as claimed in claim 2, characterized in that: The metal block (8) comprises a rigid base (81) and a flexible cover (82) attached to the rigid base (81), and the space between the rigid base (81) and the flexible cover (82) is filled with electrorheological fluid (83).

4. A hydraulic stretcher protection structure as in claim 1, wherein: A plurality of insertion rods (11) are slidingly installed on the annular sliding cylinder (4), a plurality of insertion holes (12) are arranged on the annular protective cover (2), and the insertion rod (11) is matched with the insertion hole (12).

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