CN216008447U

CN216008447U - Sealing rubber cylinder, sealing liquid scraping device and blowout prevention box

Info

Publication number: CN216008447U
Application number: CN202121413089.6U
Authority: CN
Inventors: 刘凯荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-03-11
Anticipated expiration: 2031-06-24

Abstract

The utility model provides a sealing rubber cylinder, a sealing liquid scraping device and a blowout prevention box. Relates to a sealing rubber cylinder, which comprises an elastic boss, wherein the elastic boss is formed by extending the inner wall inwards; the lug boss inter-groove is arranged between the elastic lugs; the steel wire rope hole and the elastic boss are coaxially arranged; the elastic lug boss and the lug boss are matched with each other through the groove, and the elastic lug boss is used for generating large elastic deformation after being subjected to extrusion deformation to tightly hold the steel wire rope and simultaneously form good sealing oil scraping performance. Still relate to a sealed liquid device of scraping, including foretell sealed packing element, extrusion packing element and hard stay tube. Still relate to a prevent spouting box, including connecting pipe, foretell sealed liquid scraping device and gas accuse pipeline. The sealing rubber sleeve, the sealing liquid scraping device and the blowout prevention box solve the technical problem that the sealing liquid scraping effect of the existing sealing rubber sleeve on the steel wire rope is not good, the technical effect that only less well liquid is taken out in the process of pumping the steel wire rope, and the pollution to the environment is reduced is achieved.

Description

Sealing rubber cylinder, sealing liquid scraping device and blowout prevention box

Technical Field

The utility model relates to the technical field of blowout prevention boxes, in particular to a sealing rubber cylinder, a sealing liquid scraping device and a blowout prevention box.

Background

The blowout prevention box is a blowout prevention device used for a wellhead in swabbing operation, and the safety, environmental protection and green construction are directly influenced by the quality of the sealing performance of the blowout prevention box.

The existing blowout prevention box is internally provided with a primary or secondary sealing liquid scraping device, the sealing liquid scraping device comprises an extrusion rubber cylinder and a sealing rubber cylinder, the sealing liquid scraping device is arranged in a connecting pipe of the blowout prevention box, and two ends of the connecting pipe are connected with a wire pipe joint for fixing and communicating, so that a closed chamber is formed between the sealing rubber cylinder and the connecting pipe; when the pumping steel wire rope is lifted up, the sealing cavity is inflated to enable the extrusion rubber cylinder to radially deform and extrude the sealing rubber cylinder to tightly hold the steel wire rope, and the sealing rubber cylinder is used for scraping partial well liquid on the steel wire rope; when the pumping rope is lifted up to quickly discharge liquid, more well liquid is still taken out from a gap between the sealing rubber sleeve and the steel wire rope along with the steel wire rope or sprayed into the air and is scattered on a well site, so that pollution is caused.

The present inventors have found at least the following problems in implementing the present embodiment:

the existing sealing rubber cylinder has poor sealing liquid scraping effect on the steel wire rope, and still takes more well liquid out in the process of pumping the steel wire rope, thereby causing more environmental pollution.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sealing rubber cylinder, a sealing liquid scraping device and a blowout prevention box, and solves the technical problems that the sealing rubber cylinder has poor sealing liquid scraping effect on a steel wire rope, and more well liquid is still carried out in the process of pumping the steel wire rope, so that more environmental pollution is caused.

The utility model discloses the scheme:

in a first aspect, the present invention provides a packing unit, comprising: the elastic bosses are integrally formed with the inner wall of the sealing rubber cylinder, are formed by inwards extending the inner wall, and are uniformly distributed along the axial direction of the sealing rubber cylinder; the lug boss inter-groove is arranged between the elastic lugs and is used for increasing the elasticity of the elastic lugs; the steel wire rope hole is coaxially arranged with the elastic boss and is matched with the steel wire rope; the elastic lug boss and the lug boss inter-groove are matched and used for generating large elastic deformation after being subjected to extrusion deformation so as to tightly hold the steel wire rope and form good sealing oil scraping performance.

Furthermore, an included angle formed by at least the lower side wall of the elastic boss and the end wall of the elastic boss is an acute angle; and the lower edge of the elastic boss corresponding to the acute angle is used for scraping well liquid on the outer wall of the steel wire rope.

Furthermore, the sealing rubber tube is formed by splicing a plurality of axial rubber tube strips.

Has the advantages that:

the utility model provides a sealing rubber cylinder which comprises an elastic lug boss inter-boss groove, wherein the elastic lug boss is matched with the lug boss inter-boss groove, and the elastic lug boss can generate larger elastic deformation after being extruded and deformed, so that a steel wire rope is tightly held, and good sealing oil scraping performance is formed.

Therefore, compared with the conventional sealing rubber tube, the sealing rubber tube has the advantages that the sealing and oil scraping effects on the steel wire rope during pressure deformation are enhanced by arranging the similar concave-convex structure on the inner tube wall, so that less well fluid is taken out in the process of pumping the steel wire rope, and the pollution to the environment is reduced.

In a second aspect, the present invention also provides a sealing wiper device, comprising: the above-mentioned sealing rubber cylinder; the extrusion rubber cylinder is sleeved on the sealing rubber cylinder, sealing edges are integrally formed on the outer walls of the two ends of the extrusion rubber cylinder respectively, and the sealing edges extend outwards from the outer end wall of the extrusion rubber cylinder in the radial direction; the hard support tube is sleeved on the periphery of the extrusion rubber tube and arranged between the two sealing edges, two ends of the hard support tube are abutted to or arranged close to one side of the sealing edge, and the side wall of the hard support tube is provided with an air guide hole; the extrusion rubber cylinder and the hard support tube are used for being matched with a connecting tube and a two-end wire tube joint, and a sealing cavity is formed between the extrusion rubber cylinder and the connecting tube.

Has the advantages that:

the utility model also provides a sealing and liquid scraping device which comprises the sealing rubber cylinder, so that the effects and advantages of the sealing and liquid scraping device also comprise the effects and advantages of the sealing rubber cylinder, and the description is omitted.

In a third aspect, the present invention also provides a blowout preventer cartridge comprising: a plurality of connecting pipes are adopted, and the connecting pipes are communicated with one another; in the above-mentioned sealing liquid scraping device, the sealing liquid scraping device is fixedly arranged in the connecting pipe, and at least one sealing liquid scraping device is adopted; the pneumatic control pipeline is communicated with the connecting pipe corresponding to the sealing liquid scraping device; when the sealing liquid scraping devices are multiple, the sealing liquid scraping devices are communicated with the corresponding connecting pipes through wire pipe joints in a matched mode to form a backflow chamber, and the backflow chamber is communicated with an overflow pipeline.

Further, still include the liquid brushing device, the liquid brushing device includes: the brush cylinder is arranged in the connecting pipe; the bristles are annularly arranged on the inner wall of the brush barrel, and the end parts of the bristles can abut against the spiral groove of the steel wire rope; the liquid brushing device is at least arranged at the upper end of the sealed liquid scraping device, and the two connecting pipes are communicated and fixed through a wire pipe joint and used for sequentially carrying out sealed liquid scraping and liquid brushing on the steel wire rope.

Further, between the liquid brushing device and the sealing liquid scraping device, the corresponding connecting pipe is matched and communicated with the wire pipe joint to form a backflow chamber, and the backflow chamber is communicated with the overflow pipeline.

Further, still include righting the device, righting the device set up in sealed both ends of scraping the liquid device, just righting the device including righting the wheel and/or right the sleeve pipe, right the sleeve pipe and have the guiding hole of wearing to establish wire rope.

Furthermore, the righting sleeve is at least arranged at the lower end of the sealed liquid scraping device, is arranged in the wire pipe joint and is communicated and fixed with the lower end of the sealed liquid scraping device through the wire pipe joint.

Further, still include the safety joint, the safety joint is fixed with the righting device intercommunication of lower extreme, and the safety joint includes: the safety joint includes: the fixing outer tube is provided with a fixing groove; the sliding inner pipe is connected with a safety pin block in a sliding manner and arranged in the fixed outer pipe; the sliding sleeve is arranged in the sliding inner tube, the outer wall of the sliding sleeve is abutted against one end of the safety pin block, so that the other end of the sliding sleeve is limited in the fixing groove, and the lower end of the sliding sleeve is provided with a limiting groove matched with the mounting pin block; the spring is arranged between the upper end of the sliding sleeve and the upper end of the sliding inner tube, so that the lower end of the sliding sleeve is abutted against the lower end of the sliding inner tube, and when the sliding sleeve moves upwards to press the spring, the limiting groove corresponds to the safety pin block; the sliding sleeve is used for fixing the sliding inner pipe or separating the sliding inner pipe from the fixed outer pipe.

Has the advantages that:

the utility model also provides a blowout preventer box comprising the sealing liquid scraping device, and therefore effects and advantages of the blowout preventer box also comprise the effects and advantages of the sealing liquid scraping device, and are not described in detail herein.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a longitudinal cross-sectional view of a blowout preventer cartridge according to the present embodiment;

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

FIG. 3 is a longitudinal sectional view of the sealant cartridge provided in the present embodiment;

fig. 4 is a top view of the sealant cartridge provided in this embodiment;

FIG. 5 is an enlarged view of a portion of FIG. 1 at B;

fig. 6 is a longitudinal sectional view of the safety joint provided in the present embodiment.

Icon:

1-sealing the liquid scraping device; 11-sealing rubber cylinder; 111-an elastic boss; lower edge-1111; 112-grooves between bosses; 113-wire rope holes; 114-a glue cartridge strip; 12-extruding the rubber cylinder; 121-sealing edge; 13-hard support tube;

2-connecting pipe;

3-wire pipe joints;

4-pneumatic control pipeline;

5-a reflow chamber;

6-an overflow line;

7-liquid brushing device; 71-a brush cylinder; 72-bristles;

8-centralizing the casing;

9-a safety joint; 91-fixing the outer tube; 911-fixed groove; 92-sliding the inner tube; 921-safety pin block; 93-a sliding sleeve; 931-a limit groove; 94-a spring;

10-steel wire rope.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In a first aspect, the present embodiment provides a sealant cartridge, as shown in fig. 1 to 4, including: the elastic bosses 111 are integrally formed with the inner wall of the sealing rubber cylinder 11, are formed by inward extension of the inner wall, and are uniformly distributed along the axial direction of the sealing rubber cylinder 11; the inter-boss grooves 112 are formed between the elastic bosses 111, and the inter-boss grooves 112 are used for increasing the elasticity of the elastic bosses 111; the steel wire rope hole 113 is coaxially arranged with the elastic boss 111, and is matched with the steel wire rope 10; the elastic bosses 111 are matched with the inter-boss grooves 112, and are used for generating large elastic deformation after being subjected to extrusion deformation so as to tightly hold the steel wire rope 10 and form good sealing oil scraping performance.

Specifically, the sealing rubber tube 11 includes the groove 112 between the elastic boss 111 and the boss, and the groove 112 is matched with between this elastic boss 111 and the boss, and can make the elastic boss 111 produce great elastic deformation after receiving the extrusion deformation, thereby tightly holding the wire rope 10 tightly, and simultaneously forming good sealing oil scraping performance.

Therefore, compared with the existing conventional sealing rubber tube 11, the sealing rubber tube 11 has the advantages that the sealing and oil scraping effects on the steel wire rope 10 during pressure deformation are enhanced by arranging the similar concave-convex structure on the inner tube wall, so that less well fluid is taken out in the process of pumping the steel wire rope, and the pollution to the environment is reduced.

In this embodiment, referring to fig. 3, an included angle between at least a lower side wall of the elastic boss 111 and an end wall thereof is an acute angle; the lower edge 1111 of the elastic boss 111 corresponding to the acute angle is used for scraping well fluid on the outer wall of the steel wire rope 10.

Optionally, one or both sidewalls of the elastic projection 111 form an acute angle with the end wall; illustratively, the lower side wall of the resilient projection 111 forms an acute angle with the direction of its end wall. The inclination direction of the lower edge 1111 corresponding to the acute angle is opposite to the moving direction of the steel wire rope 10, the lower edge 1111 inclines downwards, and the upper edge moves upwards, so that the lower edge 1111 can effectively scrape well fluid. In addition, when the upper and lower sidewalls of the elastic projection 111 form acute angles with the end walls thereof, the longitudinal section of the elastic projection 111 is substantially parallelogram-shaped.

In this embodiment, referring to fig. 4, the sealant barrel 11 is formed by splicing a plurality of axial sealant barrel strips 114.

Specifically, packing element strip 114 concatenation forms sealed packing element 11 and sets up in extrusion packing element 12, and this kind of structure that adopts the symmetry concatenation, for holistic structure, each packing element strip 114's elastic deformation degree is great and more even, and sealed frizing effect is better.

In a second aspect, the present embodiment further provides a sealing wiper device, as shown in fig. 1-2, including: the above-mentioned packing rubber 11; the extrusion rubber cylinder 12 is sleeved on the sealing rubber cylinder 11, sealing edges 121 are respectively integrally formed on the outer walls of the two ends of the extrusion rubber cylinder 12, and the sealing edges 121 radially extend outwards from the outer end wall of the extrusion rubber cylinder 12; the hard support tube 13 is sleeved on the periphery of the extrusion rubber cylinder 12 and is arranged between the two sealing edges 121, two ends of the hard support tube 13 are abutted or arranged close to one side of the sealing edges 121, and the side wall of the hard support tube 13 is provided with an air guide hole; wherein, the extrusion rubber cylinder 12 and the hard support tube 13 are used for matching with the connecting tube 2 and the two-end wire tube joint 3, and a sealed chamber is formed between the extrusion rubber cylinder 12 and the connecting tube 2.

Specifically, during sealing, the wire pipe joint 3 and the hard support pipe 13 are matched and respectively clamped and abutted to two sides of the sealing edge 121, and meanwhile, the wire pipe joint 3 is in threaded connection with the corresponding connecting pipe 2, so that the extrusion rubber cylinder 12, the wire pipe joint 3 and the connecting pipe 2 form a sealing chamber. Wherein, the connecting pipe 2 is communicated with the air control pipeline 4, and the air is led in through the air guide hole of the hard supporting pipe 13 and tightly presses the extrusion rubber cylinder 12. In addition, the extrusion rubber barrel 12 adopts the matching structure of the sealing edge 121 to match and seal, and is more durable and less prone to damage compared with the conventional matching structure.

In a third aspect, the present invention further provides a blowout preventer, as shown in fig. 1, including: a plurality of connecting pipes 2 are adopted, and the connecting pipes 2 are communicated with one another; in the sealing liquid scraping device 1, the sealing liquid scraping device 1 is fixedly arranged in the connecting pipe 2, and at least one sealing liquid scraping device 1 is adopted; the pneumatic control pipeline 4 is communicated with the connecting pipe 2 corresponding to the sealing liquid scraping device 1; when the sealing liquid scraping device 1 is in a plurality of forms, the sealing liquid scraping device 1 is communicated with the corresponding connecting pipe 2 through the wire pipe joint 3 in a matched mode to form a backflow chamber 5, and the backflow chamber 5 is communicated with an overflow pipeline 6.

Specifically, take the example of adopting two sealed liquid scraping devices 1, wherein, the two are communicated and form a backflow chamber 5 through the matching of the wire pipe joint 3 and the corresponding connecting pipe 2, and the backflow chamber 5 discharges the well liquid to a designated recovery container through the overflow pipeline 6 communicated with the backflow chamber.

In this embodiment, please refer to fig. 1 and fig. 5, further comprising a liquid brushing device 7, wherein the liquid brushing device 7 comprises: the brush cylinder 71, the brush cylinder 71 is set up in the joint pipe 2; the bristles 72 are annularly arranged on the inner wall of the brush barrel 71, and the end parts of the bristles 72 can abut against the spiral groove of the steel wire rope 10; wherein, the liquid brushing device 7 is at least arranged at the upper end of the sealed liquid scraping device 1, and the connecting pipes 2 corresponding to the liquid brushing device and the liquid scraping device are communicated and fixed through the wire pipe joint 3 and used for sequentially carrying out sealed liquid scraping and liquid brushing on the steel wire rope 10.

Specifically, the ends of the bristles 72 are abutted around the outer wall of the wire rope 10, so that residual well fluid in the spiral groove of the wire rope 10 can be brushed off, and further cleaning of the wire rope 10 is realized.

In this embodiment, referring to fig. 1, a backflow chamber 5 is formed between the liquid brushing device 7 and the sealing liquid scraping device 1 by the corresponding connection pipe 2 and the wire pipe joint 3, and the backflow chamber 5 is communicated with the overflow pipeline 6.

In particular, the well fluid collected in the return chamber 5 is directed to a designated recovery vessel through an overflow line 6.

In this embodiment, please refer to fig. 1, the sealing liquid scraping device further includes a centering device, the centering device is disposed at two ends of the sealing liquid scraping device 1, the centering device includes a centering wheel and/or a centering sleeve 8, and the centering sleeve 8 has a guiding hole through which a steel wire rope 10 passes.

Optionally, the righting device comprises a righting wheel and/or a righting sleeve 8 for limiting and guiding; wherein, the number of the righting devices is 2 and the righting devices are respectively arranged at the upper end and the lower end of the sealed liquid scraping device 1; illustratively, both ends of the sealing liquid scraping device 1 adopt a centralizing wheel or a centralizing sleeve 8, or one end adopts a centralizing wheel and the other end adopts a centralizing sleeve 8; preferably, the upper end adopts a centralizing wheel, and the lower end adopts a centralizing sleeve 8.

In this embodiment, referring to fig. 1, the centering sleeve 8 is at least disposed at the lower end of the sealing liquid scraping device 1, and the centering sleeve 8 is installed in the wire pipe joint 3 and is fixed to the lower end of the sealing liquid scraping device 1 through the wire pipe joint 3.

Specifically, the centralizing sleeve 8 is made of wear-resistant materials, and the steel wire rope 10 is arranged in an inner guide hole of the centralizing sleeve 8 and can move relatively. The adoption of the centralizing sleeve 8 is convenient for installation, disassembly and replacement.

In this embodiment, please refer to fig. 1 and fig. 6, the safety joint 9 is further included, the safety joint 9 is fixed to the lower centering device in a communicating manner, and the safety joint 9 includes: the fixing outer tube 91, the fixing outer tube 91 is provided with a fixing groove 911; the sliding inner tube 92, the sliding inner tube 92 is connected with the safety pin block 921 in a sliding manner, and the sliding inner tube 92 is arranged in the fixed outer tube 91; the sliding sleeve 93 is arranged in the sliding inner tube 92, the outer wall of the sliding sleeve 93 is abutted against one end of the safety pin block 921, so that the other end of the sliding sleeve 93 is limited in the fixing groove 911, and the lower end of the sliding sleeve 93 is provided with a limiting groove 931 matched with the mounting pin block; and a spring 94, the spring 94 is arranged between the upper end of the sliding sleeve 93 and the upper end of the sliding inner tube 92, so that the lower end of the sliding sleeve 93 is abutted against the lower end of the sliding inner tube 92, and when the sliding sleeve 93 moves upwards to press the spring 94, the limit groove 931 corresponds to the safety pin block 921; the sliding sleeve 93 and the safety pin block 921 are matched with the fixing groove 911 to fix or separate the sliding inner tube 92 from the fixing outer tube 91.

Specifically, when the sliding inner tube 92 is fixed to the fixed outer tube 91, the side wall of the sliding sleeve 93 abuts against one end of the safety pin block 921, and the other end of the sliding sleeve is limited in the fixed groove 911 to realize fixation; when the sliding inner tube 92 is separated from the fixed outer tube 91, the sliding sleeve 93 moves the pressing spring 94 upward, and the other end of the safety pin 921 is pressed radially by the fixed slot 911, so that one end of the safety pin is slidably clamped into the limiting slot 931, and then the sliding sleeve 93 drives the sliding inner tube 92 to separate from the fixed outer tube 91. In addition, the sliding sleeve 93 is moved upward by being pushed by a cap attached to the lower end of the wire rope 10.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A packing unit (11) comprising:

the elastic bosses (111) are integrally formed with the inner wall of the sealant barrel (11), are formed by extending the inner wall inwards, and are uniformly distributed along the axial direction of the sealant barrel (11);

the inter-boss grooves (112) are arranged between the elastic bosses (111) and used for increasing the elasticity of the elastic bosses (111);

the steel wire rope hole (113) is coaxially arranged with the elastic boss (111) and is matched with the steel wire rope (10);

the elastic lug boss (111) and the lug boss inter-groove (112) are matched and used for generating large elastic deformation after being subjected to extrusion deformation to tightly hold the steel wire rope (10) and simultaneously forming good sealing oil scraping performance.

2. The packing unit (11) according to claim 1, wherein at least the lower side wall of the elastic projection (111) forms an acute angle with the end wall thereof;

the lower edge (1111) of the elastic boss (111) corresponding to the acute angle is used for scraping well liquid on the outer wall of the steel wire rope (10).

3. A packing sleeve (11) according to claim 1, characterized in that said packing sleeve (11) is composed of a plurality of axial packing strips (114) spliced together.

4. A sealed wiping device (1), comprising:

a packing unit (11) according to any one of claims 1 to 3;

the extrusion rubber cylinder (12), the extrusion rubber cylinder (12) is sleeved on the sealing rubber cylinder (11), the outer walls of the two ends of the extrusion rubber cylinder (12) are respectively integrally formed with a sealing edge (121), and the sealing edge (121) radially extends outwards from the outer end wall of the extrusion rubber cylinder (12);

the hard support tube (13) is sleeved on the periphery of the extrusion rubber cylinder (12) and arranged between the two sealing edges (121), two ends of the hard support tube (13) are abutted against or arranged close to one side of the sealing edges (121), and the side wall of the hard support tube (13) is provided with an air guide hole;

the extrusion rubber cylinder (12) and the hard support tube (13) are used for being matched with the connecting tube (2) and the two-end wire tube joint (3), and a sealed cavity is formed between the extrusion rubber cylinder (12) and the connecting tube (2).

5. A blowout preventer cartridge, comprising:

a connecting pipe (2);

the sealing and liquid scraping device (1) of claim 4, wherein the sealing and liquid scraping device (1) is fixedly arranged in the connecting pipe (2), and at least one sealing and liquid scraping device (1) is adopted;

the pneumatic control pipeline (4) is communicated with the connecting pipe (2) corresponding to the sealing liquid scraping device (1);

when the sealing liquid scraping devices (1) are multiple, the sealing liquid scraping devices (1) are communicated with the corresponding connecting pipes (2) through the wire pipe joints (3) in a matched mode to form backflow chambers (5), and the backflow chambers (5) are communicated with overflow pipelines (6).

6. A blowout preventer according to claim 5, further comprising a flushing device (7), the flushing device (7) comprising:

a brush cylinder (71), wherein the brush cylinder (71) is arranged in the connecting pipe (2);

the bristles (72) are arranged on the inner wall of the brush barrel (71) in a surrounding mode, and the ends of the bristles (72) can abut against the spiral grooves of the steel wire rope (10);

the liquid brushing device (7) is at least arranged at the upper end of the sealed liquid scraping device (1), and the two corresponding connecting pipes (2) are communicated and fixed through the wire pipe joint (3) and used for sequentially carrying out sealed liquid scraping and liquid brushing on the steel wire rope (10).

7. A blowout preventer according to claim 6, wherein the flushing device (7) and the sealing wiper device (1) are in cooperative communication with the wire union (3) via the respective connecting tubes (2) and form a return chamber (5), and the return chamber (5) is in communication with the overflow line (6).

8. The blowout preventer according to claim 5, further comprising a centering device, wherein the centering device is arranged at both ends of the seal wiper (1), and the centering device comprises a centering wheel and/or a centering sleeve (8), and the centering sleeve (8) is provided with a guide hole for a steel wire rope (10).

9. A blowout preventer according to claim 8, wherein the centralizing casing (8) is arranged at least at the lower end of the seal wiper (1), and the centralizing casing (8) is mounted in the wire union (3) and is fixed in communication with the lower end of the seal wiper (1) via the wire union (3).

10. A blowout preventer cartridge according to claim 8 or 9, further comprising a safety joint (9), the safety joint (9) being secured in communication with the centralizing means at the lower end, and the safety joint (9) comprising:

the fixing device comprises a fixing outer pipe (91), wherein the fixing outer pipe (91) is provided with a fixing groove (911);

the sliding inner tube (92), a safety pin block (921) is connected to the sliding inner tube (92) in a sliding mode, and the sliding inner tube (92) is arranged in the fixed outer tube (91);

the sliding sleeve (93) is arranged in the sliding inner tube (92), the outer wall of the sliding sleeve (93) is abutted against one end of the safety pin block (921), the other end of the sliding sleeve is limited in the fixing groove (911), and the lower end of the sliding sleeve (93) is provided with a limiting groove (931) matched with the safety pin block (921);

and a spring (94), wherein the spring (94) is arranged between the upper end of the sliding sleeve (93) and the upper end of the sliding inner pipe (92) and is used for enabling the lower end of the sliding sleeve (93) to abut against the lower end of the sliding inner pipe (92), and when the sliding sleeve (93) moves upwards to press the spring (94), the limiting groove (931) corresponds to the safety pin block (921);

the sliding sleeve (93) and the safety pin block (921) are matched with the fixing groove (911) and used for fixing or separating the sliding inner tube (92) from the fixing outer tube (91).