阅读说明：本技术 一种用于阀门在线堵漏的装置及方法 (Device and method for online leak stoppage of valve ) 是由 陈海龙 赵洪波 贾继灿 侯晓犇 韩生渊 郑凤 陈佳 韩凌 李俊才 邹得风 于 2020-06-03 设计创作，主要内容包括：本发明涉及石油天然气管道维护技术领域,特别是一种用于阀门在线堵漏的装置及方法,所述装置包括包覆设置在阀体上的夹具,所述夹具外包覆设置有密封体,所述夹具与阀体之间设置有填充腔,所述填充腔内填装有密封脂块,所述夹具和所述密封体之间设置有第一加强层,所述密封体外表面包覆设置有第二加强层,形成双层相互独立又相互关联的加强密封结构,实现对阀体的全覆盖,能够有效防止阀体泄漏,封堵效果较好,所述方法采用夹具配合多层密封结构和加强结构,保证了对阀体的整体界面密封效果,同时,采用从外向内的封堵流程,避免在线封堵阀体过程中泄漏的气体滞留在密封结构中影响封堵效果,有效封堵阀体上的泄漏点及潜在泄漏点。(The invention relates to the technical field of maintenance of oil and gas pipelines, in particular to a device and a method for online plugging of a valve, wherein the device comprises a clamp coated on a valve body, a sealing body is coated outside the clamp, a filling cavity is arranged between the clamp and the valve body, a sealing grease block is filled in the filling cavity, a first reinforcing layer is arranged between the clamp and the sealing body, a second reinforcing layer is coated on the outer surface of the sealing body, a double-layer mutually independent and mutually associated reinforcing sealing structure is formed, the full coverage of the valve body is realized, the leakage of the valve body can be effectively prevented, the plugging effect is better, the method adopts the clamp matched with the multi-layer sealing structure and the reinforcing structure, the overall interface sealing effect of the valve body is ensured, meanwhile, the plugging flow from outside to inside is adopted, the gas leaked in the online plugging process of the valve body is prevented from being retained in the sealing structure to influence the plugging effect, effectively block the leakage point and the potential leakage point on the valve body.)

1. The utility model provides a device for valve is leaking stoppage on line, its characterized in that, includes anchor clamps (4) that the cladding set up on valve body (1), anchor clamps (4) outer cladding is provided with seal (7), be provided with between anchor clamps (4) and valve body (1) and fill the chamber, it is equipped with sealed fat piece (8) to fill the intracavity packing, be provided with first enhancement layer (5) between anchor clamps (4) and seal (7), seal (7) surface cladding is provided with second enhancement layer (6).

2. The device for the online valve leak stoppage according to claim 1, wherein a drainage layer (3) is arranged on the surface of the valve body (1), a plurality of drainage channels are arranged in the drainage layer (3), and the drainage channels are communicated with leakage points on the valve body (1).

3. A device for on-line plugging of a valve according to claim 2, wherein the drainage layer (3) is composed of a plurality of fiber filaments laid on the valve body (1), and the drainage channel is formed between two adjacent fiber filaments.

4. The device for the online valve leak stoppage according to claim 1, wherein a plurality of glue injection nozzles (9) are arranged on the fixture (4), one end of each glue injection nozzle (9) is communicated with the filling cavity, the other end of each glue injection nozzle (9) extends out of the sealing body (7), and each glue injection nozzle (9) is used for filling a sealing grease block (8) into the filling cavity.

5. Device for the on-line leak stoppage of valves according to claim 1, characterized in that said first reinforcing layer (5) and said second reinforcing layer (6) respectively comprise a plurality of satin fabric layers and/or fabric layers arranged one on top of the other from the inside towards the outside.

6. A method for on-line leak stoppage of a valve, using a device according to any one of claims 1 to 5, and comprising the steps of:

s1: preparation before plugging: carrying out surface cleaning, leakage point detection and leakage amount detection on the valve body (1) and carrying out position marking on the leakage point;

s2: the drainage layer (3) is provided with: laying a plurality of fiber yarns on the valve body (1) along the axial direction of the pipeline (2), and winding a plurality of fiber yarns on the valve body (1) along the radial direction of the pipeline (2) to form the drainage layer (3);

s3: first stuffing of the sealing grease block: a sealing grease block (8) is integrally filled on the surface of the valve body (1), and the position with the maximum leakage amount in each leakage point is reserved as a drainage hole which is communicated with the drainage layer (3);

s4: and (3) installing a clamp (4): a metal clamp (4) is integrally coated outside the valve body (1);

s5: the first reinforcing layer (5) is provided with: a first reinforcing layer (5) is integrally coated outside the metal clamp (4);

s6: installing a die: a mould is arranged outside the metal clamp (4) in a covering mode, a pouring opening is formed in the mould, and the shape of the inner cavity of the mould is matched with that of the sealing body (7);

s7: molding of the sealing body (7): filling a filling material through the filling opening, and taking down the mold after forming the sealing body (7);

s8: the second reinforcing layer (6) is provided with: a second reinforcing layer (6) is integrally coated outside the sealing body (7);

s9: the sealing grease block (8) is filled for the second time: a glue injection gun is adopted to fill the sealing grease block (8) in the filling cavity from a glue injection nozzle (9) on the clamp (4), and the maximum glue injection pressure of the glue injection gun is less than or equal to the design operating pressure of the pipeline and is more than or equal to 5 Mpa;

s10: surface treatment of the sealing body (7): the surface of the sealing body (7) is colored and coated.

7. The method for on-line leak stoppage of the valve as recited in claim 6, wherein the S5 includes the steps of:

s5.1: coating viscose on the surface of the clamp (4) and winding satin cloth along the radial direction of the pipeline (2), wherein the number of winding layers is not less than 3, and the viscose soaks the satin cloth to form a satin cloth layer;

s5.2: coating viscose on the surface of the satin cloth layer and winding fiber cloth along the radial direction of the pipeline (2), wherein the number of winding layers is not less than 4, and the viscose soaks the fiber cloth to form an inner fiber cloth layer;

s5.3: coating viscose on the surface of the inner fiber cloth layer and winding fiber cloth strips at the opposite angles in a crossed mode, wherein the number of winding layers is not less than 6, and the viscose permeates the fiber cloth strips to form the outer fiber cloth layer.

8. The method for on-line leak stoppage of the valve as recited in claim 6, wherein the S8 includes the steps of:

s8.1: coating viscose on the surface of the sealing body (7) and integrally laying satin cloth blocks, wherein the number of laying layers is not less than 2, so that a satin cloth laying layer is formed;

s8.2: coating viscose on the surface of the satin cloth laying layer and winding the satin cloth along the radial direction of the pipeline (2), wherein the number of winding layers is not less than 2, and the viscose soaks the satin cloth to form a satin cloth winding layer;

s8.3: coating viscose on the surface of a satin cloth winding layer and continuously winding fiber cloth strips in a crossed and opposite angle mode, wherein the number of winding layers is not less than 6, and the viscose permeates the fiber cloth strips to form an inner fiber cloth layer;

s8.4: coating viscose on the surface of the inner fiber cloth layer, winding the fiber cloth in an annular displacement-free mode along the radial direction of the pipeline (2), wherein the number of winding layers is not less than 2, and the viscose soaks the fiber cloth to form an outer fiber cloth layer.

9. The method for on-line plugging of the valve as claimed in claim 6, wherein the step S9 comprises the steps of:

s9.1: glue is injected into one glue injection nozzle (9) except the glue injection nozzle (9) corresponding to the drainage hole by adopting a single glue injection gun until the glue overflows from the two adjacent glue injection nozzles (9), and the glue injection nozzle (9) for injecting glue initially is blocked;

s9.2: two glue injection guns are adopted to simultaneously inject glue into the two glue injection nozzles (9) overflowing glue in the S9.1, until the two adjacent glue injection nozzles (9) overflow glue, the glue injection nozzles (9) connected with the glue injection guns are blocked;

s9.3: repeating the step S9.2 until the glue injection nozzle (9) corresponding to the drainage hole overflows glue;

s9.4: and injecting glue into the glue injection nozzle (9) corresponding to the drainage hole until the sealing grease block (8) can not be injected, and blocking the glue injection nozzle (9) corresponding to the drainage hole.

10. The method for on-line plugging of a valve as recited in claim 6, wherein in S7, the filling material is mixed with glass fiber yarn.

Technical Field

The invention relates to the technical field of maintenance of petroleum and natural gas pipelines, in particular to a device and a method for online leak stoppage of a valve.

Background

On the partial pipeline at natural gas production and transmission gas station, often can be provided with normally closed valve, these valves can take place to connect sealed inefficacy under the erosion of long-time outdoor environment, the condition of leaking appears, causes very big potential safety hazard, because there is the natural gas in these pipelines for a long time, lead to these valves can not maintain through conventional change, in order to guarantee the safe operation at station, can only carry out the shutoff to the leakage point on these valves.

However, at present, no device and method for plugging the leakage point of the valve on the flammable and explosive pipeline exist, the conventional welding, spraying and other modes are adopted, the greater potential safety hazard is easily caused, the appearance structure of the valve is irregular, the plugging effect of the conventional plugging mode is not good, and the secondary leakage is easily caused.

Therefore, a technical scheme is needed at present to solve the technical problem that the valve on the existing flammable and explosive gas pipeline is not easy to realize on-line plugging.

Disclosure of Invention

The invention aims to: aiming at the technical problem that the valve on the existing flammable and explosive gas pipeline is not easy to realize online plugging, the device and the method for online plugging of the valve are provided.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a device for valve is leaking stoppage on line, includes that the cladding sets up the anchor clamps on the valve body, the outer cladding of anchor clamps is provided with the seal, be provided with the packing chamber between anchor clamps and the valve body, the packing intracavity is filled with sealed fat piece, anchor clamps with be provided with first enhancement layer between the seal, the outer surface cladding of seal is provided with the second enhancement layer.

According to the device for online plugging of the valve, the sealing grease block inside and the sealing body outside are matched by the clamp to form a multi-layer sealing structure, so that the full coverage of the valve body is realized, the leakage of the valve body can be effectively prevented, the plugging effect is good, meanwhile, the two sealing structures are respectively reinforced by arranging the first reinforcing layer and the second reinforcing layer, so that the double-layer mutually independent and mutually associated reinforcing sealing structures are formed, the plugging effect is further improved, the device is simple in structure and easy to prepare, is not influenced by inflammable and explosive gases in the valve body, and can be easily applied to the plugging work of the valve on a pipeline for conveying the inflammable and explosive gases.

As a preferable scheme of the invention, the surface of the valve body is provided with a drainage layer, a plurality of drainage channels are arranged in the drainage layer, and the drainage channels are communicated with leakage points on the valve body. The valve body of leakage state plays the effect of leaking gas drainage through the drainage layer to form the device that has drainage structure, seal structure and additional strengthening's valve on-line leaking stoppage simultaneously, avoid the gaseous detention of online leakage in-process valve body leakage in seal structure through drainage structure, avoid the gas of leaking to influence the fashioned seal structure's of fashioned seal quality, guarantee seal structure's shutoff effect, simultaneously through the whole seal structure intensity of strengthening of additional strengthening, further promote the shutoff effect.

As a preferable scheme of the present invention, the drainage layer is composed of a plurality of fiber filaments laid on the valve body, and the drainage channel is formed between two adjacent fiber filaments.

As a preferred scheme of the invention, the fixture is provided with a plurality of glue injection nozzles, one end of each glue injection nozzle is communicated with the filling cavity, the other end of each glue injection nozzle extends out of the sealing body, and each glue injection nozzle is used for filling sealing grease blocks into the filling cavity. Through setting up the injecting glue mouth, pack the sealed fat piece again after the seal shaping, form the shutoff mode from outside to inside, the injecting glue mouth not only plays the effect of packing sealed fat piece, plays the effect of drainage leakage gas moreover in the shutoff process, avoids leaking gas and is blocked between valve body and seal structure, further makes the device can be adapted to the online shutoff of the valve body of leakage in-process to guarantee the shutoff effect.

In a preferred embodiment of the present invention, the first reinforcing layer and the second reinforcing layer each include a plurality of satin fabric layers and/or fiber fabric layers stacked from the inside to the outside. The composite material satin cloth and the fiber cloth are matched with the clamp, a multi-layer reinforced interface sealing structure can be formed easily, the forming is easy, the satin cloth and the fiber cloth of the flexible material can be tightly attached to each sealing interface, and the blocking effect is further improved.

A method for on-line leak stoppage of a valve adopts the device and comprises the following steps: s1: preparation before plugging: carrying out surface cleaning, leakage point detection and leakage amount detection on the valve body, and carrying out position marking on the leakage point; s2: and (3) arranging a drainage layer: laying a plurality of fiber yarns on the valve body along the axial direction of the pipeline, and winding a plurality of fiber yarns on the valve body along the radial direction of the pipeline to form the drainage layer; s3: first stuffing of the sealing grease block: a sealing grease block is integrally filled on the surface of the valve body, and the position with the maximum leakage amount in each leakage point is reserved as a drainage hole which is communicated with the drainage layer; s4: and (3) mounting a clamp: the metal clamp is integrally coated outside the valve body; s5: the first reinforcing layer is provided with: a first reinforcing layer is integrally coated outside the metal clamp; s6: installing a die: a mould is arranged outside the metal clamp in a wrapping mode, a pouring opening is formed in the mould, and the shape of the inner cavity of the mould is matched with that of the sealing body; s7: forming a sealing body: filling a filling material through the filling opening, and taking down the mold after forming the sealing body; s8: the second reinforcing layer is provided with: a second reinforcing layer is integrally coated outside the sealing body; s9: and (3) secondary filling of the sealing grease block: filling the filling cavity with sealing grease blocks from the glue injection nozzle by using a glue injection gun, wherein the maximum glue injection pressure of the glue injection gun is less than or equal to the designed operating pressure of the pipeline and is 5 Mpa; s10: and (3) surface treatment of the sealing body: and performing coloring coating treatment on the surface of the sealing body.

According to the method for online plugging of the valve, the overall interface sealing effect of the valve body is ensured by adopting the clamp to match the multilayer sealing structure and the reinforcing structure, meanwhile, the plugging process from outside to inside is adopted, the phenomenon that gas leaked in the process of online plugging of the valve body is retained in the sealing structure to influence the plugging effect is avoided, the full-coverage plugging of the valve body is realized, the leakage points and potential leakage points on the valve body are effectively plugged, and the plugging effect on the valve body is ensured to the maximum extent.

As a preferable aspect of the present invention, S5 includes the steps of: s5.1: coating viscose on the surface of a clamp and winding satin cloth along the radial direction of a pipeline, wherein the number of winding layers is not less than 3, and the viscose soaks the satin cloth to form a satin cloth layer; s5.2: coating viscose on the surface of the satin cloth layer and winding fiber cloth along the radial direction of the pipeline, wherein the number of winding layers is not less than 4, and the viscose soaks the fiber cloth to form an inner fiber cloth layer; s5.3: coating viscose on the surface of the inner fiber cloth layer and winding fiber cloth strips at the opposite angles in a crossed mode, wherein the number of winding layers is not less than 6, and the viscose permeates the fiber cloth strips to form the outer fiber cloth layer. Cloth material can be easier and the irregular surface laminating of valve body, the cooperation viscose carries out the shutoff of laminating to each leakage point, and simultaneously, adopt the different winding methods of multiple different materials to set up first enhancement layer, guarantee on the one hand that sealed fat piece packs the stable in structure of in-process anchor clamps, guarantee the effect of packing of sealed fat piece, on the other hand is favorable to the first enhancement layer of cloth material through laminated structure, the gradual leakage quantity that reduces each leakage point in the shutoff process, avoid leaking the gas and detain in seal structure, improve the shutoff effect to each leakage point.

As a preferable aspect of the present invention, S8 includes the steps of: s8.1: coating viscose on the surface of the sealing body and integrally laying satin cloth blocks, wherein the number of laying layers is not less than 2, so that a satin cloth laying layer is formed; s8.2: coating viscose on the surface of a satin cloth laying layer and winding satin cloth along the radial direction of a pipeline, wherein the number of winding layers is not less than 2, and the viscose soaks the satin cloth to form a satin cloth winding layer; s8.3: coating viscose on the surface of a satin cloth winding layer and continuously winding fiber cloth strips in a crossed and opposite angle mode, wherein the number of winding layers is not less than 6, and the viscose permeates the fiber cloth strips to form an inner fiber cloth layer; s8.4: coating viscose on the surface of the inner fiber cloth layer, winding the fiber cloth in an annular displacement-free mode along the radial direction of the pipeline, wherein the number of winding layers is not less than 2, and the viscose soaks the fiber cloth to form an outer fiber cloth layer. The sealing body is protected through the second reinforcing layer, the overall strength of the sealing body is improved, and the long-time plugging effect of the multilayer reinforced device on the valve body is guaranteed, so that the sealing device is suitable for long-time plugging of the device in an outdoor environment.

As a preferable aspect of the present invention, step S9 includes the steps of: s9.1: adopting a single glue injection gun to inject glue to one of the glue injection nozzles except the glue injection nozzle corresponding to the drainage hole until the glue overflows from the two adjacent glue injection nozzles, and blocking the glue injection nozzle for injecting glue initially; s9.2: two glue injection guns are adopted to simultaneously inject glue to the two glue injection nozzles overflowing glue in the S9.1, when glue overflows to the two adjacent glue injection nozzles, the glue injection nozzles connected with the glue injection guns are blocked; s9.3: repeating the step S9.2 until the glue overflow of the glue injection nozzle corresponding to the drainage hole; s9.4: and injecting glue into the glue injection nozzle corresponding to the drainage hole until the sealing grease block cannot be injected, and blocking the glue injection nozzle corresponding to the drainage hole. Through adopting specific law order to pack sealed fat piece, make and pack the gaseous reducing gradually of in-process valve body leakage at sealed fat piece, be favorable to avoiding leaking the gaseous retention seal structure in, guarantee the whole shutoff effect of valve body.

In a preferred embodiment of the present invention, in S7, glass fiber yarns are mixed in the filler.

In summary, due to the adoption of the technical scheme, the device for online leaking stoppage of the valve has the beneficial effects that:

1. the sealing grease block inside and the sealing body outside are matched by the clamp to form a multilayer sealing structure, so that the valve body is fully covered, the valve body can be effectively prevented from leaking, and the plugging effect is good;

2. the two sealing structures are respectively reinforced by arranging the first reinforcing layer and the second reinforcing layer, so that a double-layer mutually independent and mutually associated reinforcing sealing structure is formed, and the plugging effect is further improved;

3. the device has simple structure and easy preparation, is not influenced by inflammable and explosive gas in the valve body, and can be easily applied to the leakage plugging work of the valve on a pipeline for conveying the inflammable and explosive gas;

the method for online leak stoppage of the valve has the beneficial effects that:

1. the fixture is matched with the multilayer sealing structure and the reinforcing structure, so that the sealing effect of the whole interface of the valve body is ensured;

2. by adopting the outside-in plugging flow, the gas leaked in the process of plugging the valve body on line is prevented from being retained in the sealing structure to influence the plugging effect, the full-coverage plugging of the valve body is realized, the leakage point and the potential leakage point on the valve body are effectively plugged, and the plugging effect on the valve body is ensured to the maximum extent.

Drawings

FIG. 1 is a schematic cross-sectional view of an apparatus for on-line plugging a valve according to the present invention;

FIG. 2 is a schematic view of the construction of the clamp of the present invention;

fig. 3 is a schematic flow chart of a method for on-line plugging of a valve according to the present invention.

Icon: the sealing structure comprises a valve body 1, a pipeline 2, a flow guiding layer 3, a clamp 4, a first shell 41, a second shell 42, a matching port 43, a first reinforcing layer 5, a second reinforcing layer 6, a sealing body 7, a sealing grease block 8 and a glue injection nozzle 9.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in fig. 1-2, a device for online leaking stoppage of a valve comprises a clamp 4 coated on a valve body 1, wherein a sealing body 7 is coated outside the clamp 4, a filling cavity is arranged between the clamp 4 and the valve body 1, a sealing grease block 8 is filled in the filling cavity, a first reinforcing layer 5 is coated on the outer surface of the clamp 4, a second reinforcing layer 6 is coated on the outer surface of the sealing body 7, and the first reinforcing layer 5 and the second reinforcing layer 6 respectively comprise a plurality of satin cloth layers and/or fiber cloth layers which are stacked from inside to outside.

The utility model provides a device for online leaking stoppage of valve, through adopting sealed fat piece 8 including anchor clamps 4 cooperation and outer seal 7, form multilayer seal structure, the realization is to the full coverage of valve body 1, leak source and potential leak source can effectively be gone up to shutoff valve body 1, the shutoff effect is better, and simultaneously, adopt two enhancement layers that satin cloth layer and/or the range upon range of setting of fiber cloth layer formed to strengthen respectively and wholly strengthen multilayer seal structure, further promote the shutoff effect, and the device of this structure need not weld at valve body 1 erection site, operation such as polish, can be easier the shutoff work of carrying 2 valves on the pipeline of inflammable and explosive gas, realize the safe online shutoff of this type of valve.

Specifically, the sealing grease block 8 is filled and coated on the surface of the valve body 1, the first reinforcing layer 5 is coated on the outer surface of the clamp 4, the sealing body 7 is coated on the outer surface of the first reinforcing layer 5, and the second reinforcing layer 6 is coated on the outer surface of the sealing body 7.

Specifically, anchor clamps 4 are metal buckled anchor clamps, and the preparation is easy, and has higher intensity, lock that can be easier to pipeline 2 valve to realize the rigidity through cooperating with pipeline 2, guarantee the bulk strength of the seal structure of formation, guarantee that the long-time of device is effective.

Specifically, the sealing grease block 8 is high-strength sealing grease, and is preferably one of a mixture of 7903 sealing grease, 7903 sealing grease added with a curing agent, 7903 sealing grease and a curing agent, silicone oil and other materials conventionally used for sealing, the sealing body 7 is blended by a high-strength filler to be in an emulsion state, and then is molded by a casting mold in a solidification manner, the high-strength filler is a potting compound formed by conventional components such as epoxy resin, phenol, formaldehyde and the like, and carbon fiber is preferably added in the potting compound to increase the strength of the filler, wherein the sealing grease block 8 can be easily filled on the valve body 1 with an irregular surface shape to shape the valve body 1 with the irregular shape, so that the subsequent sealing structure can be conveniently arranged, the valve body 1 with the shaped subsequent sealing structure can be ensured to be tightly attached to the flat surface of the valve body 1 after shaping, the plugging effect is improved, and the sealing body 7 is in the process from the emulsion state to the fixing process, can be tightly filled on the surface of the clamp 4, and has the effects of shaping, strengthening, coating and sealing the clamp 4.

Specifically, the satin cloth layer is formed by paving or winding the valve body by matching a plurality of high-strength satin cloth blocks or high-strength satin cloth strips with viscose, and the fiber cloth layer is formed by paving or winding the valve body by matching a plurality of high-strength carbon fiber cloth blocks or high-strength carbon fiber cloth strips with viscose, so that the fitting effect of the first reinforcing layer 5 and the second reinforcing layer 6 is improved by arranging the cloth blocks and/or the cloth strips, and the whole plugging effect on the valve body 1 is favorably improved.

Preferably, the surface of the valve body 1 is provided with a drainage layer 3, a plurality of drainage channels are arranged in the drainage layer 3, the drainage channels are communicated with leakage points on the valve body 1, the drainage layer 3 is composed of a plurality of fiber yarns paved on the valve body 1, and the drainage channels are formed between two adjacent fiber yarns.

Specifically, the cellosilk is laid to the bolt position and the well open face position that easily appear the leakage point on valve body 1 to along the whole 5-8 rings of long cellosilk of winding of the direction that perpendicular to cellosilk was laid, form stable in structure and can realize the drainage layer 3 of violently indulging direction drainage, form the drainage passageway of a plurality of not equidirectionals, set up the in-process at the device with the convenience, along the flammable and explosive gas output of continuous leakage of drainage passageway drainage, avoid gas to be detained in seal structure, influence the shutoff effect.

Preferably, a plurality of glue injection nozzles 9 are arranged on the clamp 4, one end of each glue injection nozzle 9 is communicated with the corresponding filling cavity, the other end of each glue injection nozzle 9 extends out of the corresponding sealing body 7, and each glue injection nozzle 9 is used for filling a sealing grease block 8 into the corresponding filling cavity.

Specifically, anchor clamps 4 include first casing 41 and second casing 42 that the lock is connected, first casing 41 and second casing 42 pass through the bolt and can dismantle the connection, first casing 41 with behind the second casing 42 lock, can form two cooperation mouths 43 with 2 appearance adaptations of pipeline, be provided with a plurality of injecting glue mouths 9 on first casing 41 and the second casing 42 respectively, threaded connection has on the injecting glue mouth 9 and is used for the shutoff injecting glue mouth 9's end cap, injecting glue mouth 9 with 4 welded connection of anchor clamps.

Example 2

As shown in fig. 1-3, a method for on-line plugging of a valve, which adopts the device and comprises the following steps: s1: preparation before plugging: carrying out surface cleaning, leakage point detection and leakage amount detection on the valve body 1 and carrying out position marking on the leakage point; s2: the drainage layer 3 is provided with: laying a plurality of fiber yarns on the valve body 1 along the axial direction of the pipeline 2, and winding a plurality of fiber yarns on the valve body 1 along the radial direction of the pipeline 2 to form the drainage layer 3; s3: the first stuffing of the sealing grease block 8: a sealing grease block 8 is integrally filled on the surface of the valve body 1, and the position with the maximum leakage amount in each leakage point is reserved as a drainage hole which is communicated with the drainage layer 3; s4: and (4) installing a clamp: the metal clamp 4 is integrally coated outside the valve body 1; s5: the first reinforcing layer 5 is provided with: a first reinforcing layer 5 is integrally coated outside the metal clamp 4; s6: installing a die: a mould is arranged outside the metal clamp 4 in a wrapping mode, a pouring opening is formed in the mould, and the shape of the inner cavity of the mould is matched with that of the sealing body 7; s7: molding of the seal body 7: filling a filling material through the filling opening, and taking down the mold after forming the sealing body 7; s8: the second reinforcing layer 6 is provided with: a second reinforcing layer 6 is integrally coated outside the sealing body 7; s9: the second stuffing of the sealing grease block 8: filling the filling cavity with a sealing grease block 8 from a glue injection nozzle 9 by using a glue injection gun, wherein the maximum glue injection pressure of the glue injection gun is less than or equal to the designed operating pressure of the pipeline and is more than 5 Mpa; s10: and (3) surface treatment of the sealing body: and performing coloring coating treatment on the surface of the sealing body.

According to the method for online plugging of the valve, the metal clamp 4 is matched with the multilayer sealing structure and the reinforcing structure, the whole interface sealing effect of the valve body 1 is guaranteed, meanwhile, the plugging process from outside to inside is adopted, the phenomenon that gas leaked in the process of plugging the valve body 1 online is retained in the sealing structure to influence the plugging effect is avoided, full-coverage plugging of the valve body 1 is achieved, leakage points and potential leakage points on the valve body 1 are effectively plugged, and the plugging effect of the valve body is guaranteed to the maximum extent.

Specifically, when the process of S1 is carried out, the leakage condition of the valve body 1 needs to be monitored in real time, and the safety of the device in the setting process is ensured; to being provided with the valve body 1 that handle influence device set up, demolish the handle or cut short the valve rod of installation handle, improve the whole appearance roughness of valve body 1, in order to do benefit to seal structure and valve body 1's laminating, adopt the paint remover to carry out the paint removal rust by hand to valve body 1 that has the surface rust, filth etc. and carry out the surface roughening with the file, adopt abrasive paper or copper brush to clear away lacquer painting and rust again, in order to further do benefit to the laminating on seal structure and valve body surface, guarantee the shutoff effect.

Specifically, when S3 goes on, sealed fat piece 8 is stuffed to flush with 1 screw rod top surface of valve body, and sealed fat piece 8 is not stuffed to the biggest department of leakage rate in each leakage point, reserves for the drainage hole, drainage hole one end with drainage layer 3 intercommunication, the other end extend to outside the sealed fat piece 8 of packing, and simultaneously, sealed fat piece 8 of packing adopts and lays many times after the manual strip of holding between the fingers or twines to valve body 1 on, avoids sealed 8 compaction drainage layers 3 of fat piece to lead to drainage structure to become invalid, also is favorable to carrying out the adjustment of each packing position according to 1 appearance of valve body.

Preferably, between S4 and S5, adopt filler material to carry out the shutoff to the buckled face of anchor clamps 4 and the cooperation mouth 43 with pipeline 2 adaptation, be favorable to the stable in structure of anchor clamps 4 on the one hand, on the other hand also is favorable to improving the whole shutoff effect of anchor clamps 4, avoids in the follow-up sealing 7 mould forming process, filler material gets into in anchor clamps 4.

Specifically, the filling material is prepared by mixing viscose and wollastonite powder and stirring.

Preferably, S5 includes the steps of: s5.1: coating viscose on the surface of the clamp 4 and winding satin cloth along the radial direction of the pipeline 2, wherein the number of winding layers is not less than 3, and the viscose soaks the satin cloth to form a satin cloth layer; s5.2: coating viscose on the surface of the satin cloth layer and winding fiber cloth along the radial direction of the pipeline 2, wherein the number of winding layers is not less than 4, and the viscose soaks the fiber cloth to form an inner fiber cloth layer; s5.3: coating viscose on the surface of the inner fiber cloth layer and winding fiber cloth strips at the opposite angles in a crossed mode, wherein the number of winding layers is not less than 6, and the viscose permeates the fiber cloth strips to form the outer fiber cloth layer.

Specifically, in the S5.1, a high-strength satin cloth winding clamp with the width matched with that of the clamp 4 is adopted, when the high-strength satin cloth winding clamp is wound to the position of the glue injection nozzle 9, notches are formed in the winding direction, satin cloth blocks of 5cm × 5cm are laid at the positions of each layer of the openings in the direction perpendicular to the notches, the positions of the notches are subjected to strength restoration, and viscose capable of soaking the satin cloth blocks is coated between every two adjacent layers of the satin cloth blocks.

Specifically, S5.2 adopts a high-strength carbon fiber cloth block winding clamp 4 with the width matched with that of the clamp 4, and the winding mode is the same as that of S5.1.

Specifically, adopt the high strength carbon fiber cloth strip of width 3cm to carry out alternately winding cladding to anchor clamps 4 outer whole in S5.3, the outer fiber cloth layer cladding that forms after the winding is at anchor clamps 4 whole surface and cladding in anchor clamps 4 along the both sides terminal surface of pipeline direction, and its winding direction is different with satin cloth layer and interior fiber layer utensil, can be when compaction satin cloth layer and interior fiber layer, guarantee to anchor clamps 4 whole parcel.

Preferably, the mould forms cylindric barrel after adopting flexible steel sheet bending in S6, sets up umbelliform shrouding at the barrel both ends, forms the mould chamber, and the cutting is formed with the mouth of pouring on the barrel, and the mould barrel size is prepared according to on-the-spot valve body 1 size and actual conditions, and for the setting of convenient mould, preferably set up simple and easy support in the mould bottom, the structural stability of the mould chamber that forms between support mould and the anchor clamps guarantees the thickness homogeneity of the fashioned sealing 7 of casting mould relative valve body 1.

Preferably, in the filling material pouring process of S7, a plurality of glass fiber yarns with the length of 3-5cm are uniformly thrown and added to improve the overall strength of the sealing body 7 molded by the casting mold, meanwhile, the pouring process is carried out in stages, the interval between two adjacent stages is 10-15min, and the pouring process of the single sealing body 7 at least comprises two pouring stages.

Preferably, S8 includes the steps of: s8.1: coating viscose on the surface of the sealing body 7 and integrally laying satin cloth blocks, wherein the number of laying layers is not less than 2, so that a satin cloth laying layer is formed; s8.2: coating viscose on the surface of the satin cloth laying layer and winding the satin cloth along the radial direction of the pipeline 2, wherein the number of winding layers is not less than 2, and the viscose soaks the satin cloth to form a satin cloth winding layer; s8.3: coating viscose on the surface of a satin cloth winding layer and continuously winding fiber cloth strips in a crossed and opposite angle mode, wherein the number of winding layers is not less than 6, and the viscose permeates the fiber cloth strips to form an inner fiber cloth layer; s8.4: coating viscose on the surface of the inner fiber cloth layer, winding the fiber cloth in the circumferential direction of the pipeline 2 in a non-displacement mode, wherein the number of winding layers is not less than 2, and the viscose soaks the fiber cloth to form an outer fiber cloth layer.

Specifically, in S8.1, the sealing body 7 is integrally wrapped and laid by adopting satin cloth pieces with areas matched with the outer surface of the sealing body 7, and viscose for sufficiently soaking the satin cloth is coated between every two adjacent satin cloth pieces.

Specifically, in S8.2, the sealing body 7 is wound with a satin cloth whose width is adapted to the length direction of the sealing body 7.

Specifically, in S8.3, the high-strength carbon fiber cloth strips with the width of 5-7cm are adopted to carry out cross winding and coating on the whole outer body of the sealing body 7, and inner fiber cloth layers formed after winding are coated on the surface of the whole sealing body and are coated on the end faces of the sealing body 7 on two sides along the direction of the pipeline 2.

Preferably, step S9 includes the steps of: s9.1: injecting glue into one glue injection nozzle 9 except the glue injection nozzle 9 corresponding to the drainage hole by using a single glue injection gun until the glue overflows from the two adjacent glue injection nozzles 9, and plugging the glue injection nozzle 9 for initial glue injection; s9.2: two glue injection guns are adopted to simultaneously inject glue into the two glue injection nozzles 9 overflowing glue in the S9.1 till the two adjacent glue injection nozzles 9 overflow glue, and the glue injection nozzles 9 connected with the glue injection guns are blocked; s9.3: repeating the step S9.2 until the glue overflow of the glue injection nozzle 9 corresponding to the drainage hole; s9.4: and injecting glue into the glue injection nozzles 9 corresponding to the drainage holes until the sealing grease blocks 8 cannot be injected, and blocking the glue injection nozzles 9 corresponding to the drainage holes.

Specifically, in the step S9.1, a glue injection process is started from the glue injection nozzle 9 without the corresponding leakage point, the glue injection nozzle 9 corresponding to the leakage point with the largest leakage amount is left to be injected finally, and the matched screw cap is adopted for screwing and plugging when the glue injection nozzle 9 is plugged.

Specifically, the maximum glue injection pressure of the glue injection gun in the S9 is less than or equal to the pipeline design operation pressure +5Mpa, the glue injection pressure is adaptively adjusted by combining the optimal use temperature of the sealing grease block 8 according to the actual operation pressure and the environment temperature of the pipeline 2, so that when the sealing grease block 8 is relatively flexible, the relatively low glue injection pressure is adopted, and when the sealing grease block 8 is relatively flexible, the relatively high glue injection pressure is adopted.

Specifically, before S10, the appearance, flatness and hardness of the surface of the device need to be checked to meet the requirements of flat appearance, a babbit hardness detection of each cloth layer of more than or equal to 30 and a shore hardness of the sealing body of more than 60, and whether the plugging degree is determined after at least 48H is observed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.