CN219570143U - Direct-connection type filling sleeve - Google Patents

Abstract

The utility model discloses a direct connection type filling sleeve, which comprises a plurality of sequentially connected pipe bodies, wherein external threads and/or internal threads are arranged at two ends of each pipe body, the external threads of a first pipe body are screwed with the internal threads of a second pipe body, the inner wall of the first pipe body is flush with the inner wall of the second pipe body, the external threads are taper pipe threads, the internal threads are taper pipe threads, and the threads extend from the outer diameter to the inner diameter of a pipeline. Because the threaded connection design is adopted, the pipelines are connected together through the rotation of threads, and the installation time of the installation speed block of the design is shortened to be within 1-2 days. The screw connection design avoids the defect that high-grade steel products cannot be welded, the pipe body material can be bainitic wear-resistant steel with the strength which is about 5 times that of a common pipe, meanwhile, the strength and the wear resistance of the pipe are further improved due to the advantages of high connection strength, good stability and the like of the screw connection design, and the service life, the pressure resistance and the connection strength of the pipe are greatly improved.

Description

Direct-connection type filling sleeve

Technical Field

The utility model belongs to the technical field of slurry pipeline transportation, and particularly relates to a connecting sleeve of a filling sleeve

Background

The filling sleeve is mainly responsible for transporting tailings downhole for backfilling of downhole mining. The pipeline service mainly takes abrasion as a main part and takes connection as an auxiliary part, and at present, in the filling pipeline conveying industry, a composite pipeline is basically adopted, wherein the outer layer is a common steel pipe, and the inner layer is lined with a wear-resistant layer. Two filling sleeves with the same diameter are used for the down-hole installation of the pipeline, and the outer diameter of the pipe body is welded by adopting a coupling, so that the filling sleeves play a role after connection.

Original well inner sleeve adopts the welded joint design of pipe end area clamp, connects each pipeline through welding operation, and the advantage and disadvantage of this kind of design is as follows:

1) The method has the advantages of simple construction process, convenient field operation and low requirements on field environment and construction equipment; meanwhile, as the pipe ends are provided with the clamp designs, the welding operation can be performed only by clamping the clamp by the common elevator in the field operation process.

2) However, the defects are obvious, the welding operation time is long, and the welding is completed about 10 days in the large outline of the 600 meter well; secondly, the pressure bearing capacity of the welded pipe body is low, and the strength after welding can not be guaranteed almost; meanwhile, the welding process is limited by the existing welding process, the high-steel-grade product cannot be welded, and meanwhile, the welding process of the high-steel-grade product is complex, so that the base metal of the pipe body can generally only select a low-steel-grade product with good welding performance, and the high-steel-grade wear-resistant material can hardly be applied; meanwhile, due to the fact that the clamp design exists at the pipe end, the designed outer diameter and the designed inner diameter of the pipe body can be reduced in the same size well hole state, the conveying efficiency of ore pulp is affected, and meanwhile the service life of a conveying pipeline is affected.

The filling process adopts a full tailing paste filling self-flowing conveying process, and the slurry is conveyed into the well through a filling drill hole and then conveyed to a filling stope through a filling pipeline. In some mines, the paste consists of whole tailings, cement and water, the ratio of the lime to the sand is 1:8-1:24, the filling weight concentration is 71-73%, and the paste density is 1.96t/m ³ The paste has a yield stress of 123Pa and a plastic viscosity of 4.34Pa.s. By adopting the oil-gas sleeve, the screw thread design is not suitable for slurry conveying, and the screw thread can fail when the pipeline is worn to half, so that the screw threads cannot be ensured to be two by twoThe threaded connection of the root sleeve has the effect that vortex is generated in ore pulp conveying, so that the abrasion of the filling sleeve is accelerated.

Disclosure of Invention

In view of the above, the present utility model aims to provide a filling sleeve with a novel connection structure, which ensures that the inner wall of the sleeve is flush with the inner end surface, and improves the service life of the filling sleeve.

The inventor through long-term exploration and try, and many times experiment and effort, constantly reform innovations, in order to solve above-mentioned technical problem, the technical scheme that the utility model provides a direct connection type filling sleeve, including many tube bodies that connect in order, the both ends of tube body are provided with external screw thread and/or internal screw thread, the external screw thread of first tube body and the internal screw thread screw-thread of second tube body are in a thread engagement, first tube body inner wall and second tube body inner wall parallel and level, the external screw thread is taper pipe screw thread, the internal screw thread is taper pipe screw thread, the screw thread extends from the pipeline external diameter to inside diameter.

According to a further embodiment of the direct connection type filling sleeve, the male end face of the first pipe body is provided with a first sealing face, the female end thread stop position of the second pipe body is provided with a first stop face, and the first sealing face is attached to the first stop face.

According to a preferred embodiment of the direct connection filling sleeve according to the utility model, the first sealing surface and the first shut-off surface are planar or the first sealing surface and the first shut-off surface are conical surfaces.

According to a preferred embodiment of the direct connection filling sleeve of the present utility model, the external thread is a buttress thread or a round thread, and the internal thread is a buttress thread or a round thread.

According to a preferred embodiment of the direct connection type filling sleeve, the taper of the taper pipe thread is 1:3-17, and the thread pitch is 4-6 teeth/in. Preferably, the taper of the taper pipe thread is 1:4.5, and the pitch is 5 teeth/in.

According to a preferred embodiment of the direct connection filling sleeve of the utility model, the steel grade 150 of the pipe body has the yield strength of 950-1100 MPa and the surface hardness of HRC 35-55.

According to a preferred embodiment of the direct connection filling sleeve of the utility model, the external thread forming teeth are provided with 8mm relief zones; the internal thread forming teeth are provided with 8mm tool withdrawal areas.

According to a preferred embodiment of the direct connection filling sleeve, the outer wall of the first pipe body is flush with the outer wall of the second pipe body, a second stop surface is arranged at the stop position of the male end thread of the first pipe body, the female end face of the second pipe body is provided with a second sealing surface, and the second stop surface is attached to the second sealing surface.

According to a preferred embodiment of the direct connection filling sleeve, both ends of the first pipe body are provided with external threads, both ends of the second pipe body are provided with internal threads, and the second pipe body is a coupling.

According to a preferred embodiment of the direct connection packing sleeve of the present utility model, the collar has an outer diameter greater than the outer diameter of the first tubular body.

According to a preferred embodiment of the direct connection filling sleeve according to the utility model, the external thread and/or the internal thread is coated with a thread compound layer.

Compared with the prior art, one of the technical schemes has the following advantages:

1) Because the threaded connection design is adopted, the pipelines are connected together through the rotation screwing of the threads, and the installation time of the 600 meter well pipeline is greatly shortened from about 10 days to 1-2 days.

2) The screw connection design avoids the defect that high-grade steel products cannot be welded, the pipe body material can be bainitic wear-resistant steel with the strength which is about 5 times that of a common pipe, meanwhile, the strength and the wear resistance of the pipe are further improved due to the advantages of high connection strength, good stability and the like of the screw connection design, and the service life, the pressure resistance and the connection strength of the pipe are greatly improved.

3) In a preferred embodiment of the direct connection type filling sleeve, the pipe end of the pipe is not provided with a clamp due to the direct connection type design, so that the outer diameter and the wall thickness of the pipe can be designed to be larger under the condition of the same annular gap, the transmission efficiency is improved, and the service life of the pipe is prolonged. The direct connection type threaded connection design is convenient for mechanical operation, and can greatly improve the well descending efficiency.

4) In a preferred embodiment of the direct connection type filling sleeve, the clamp design is reserved by utilizing threaded connection and combining the existing filling pipe installation equipment, so that a common elevator can well fix a pipe body in the well descending process, the pipe body is not caused to fall into a well due to improper operation, and a pipe body locking and fixing chuck device is not required to be arranged in the field operation to prevent the pipe body from falling into the well.

5) In a preferred embodiment of the direct connection type filling sleeve, the pipeline is flush with the inner wall and the end face of the pipeline, no vortex is generated in pulp conveying, the abrasion degree of pulp on the pipeline is reduced, threads extend from the outer diameter to the inner diameter of the pipeline, the duration of threaded connection is prolonged, and the service life of the direct connection type filling sleeve is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the male end of a direct-connection filling sleeve according to a preferred embodiment of the present utility model.

FIG. 2 is a schematic view of the female end of a direct-connect filling sleeve according to a preferred embodiment of the present utility model.

FIG. 3 is a schematic illustration of a coupling structure in a preferred embodiment of the present utility model.

The marks in the figure are respectively: a 100-degree pipe body is arranged on the bottom of the pipe body,

110. the male end is provided with a male end,

111. an external thread is provided on the outer surface of the outer sleeve,

112. the first tool retracting area is provided with a first tool retracting area,

113. a first sealing surface of the first sealing plate,

114. a second cut-off surface of the first cut-off surface,

120. the female end of the nut is provided with a female end,

121. an internal thread of the screw-type screw,

122. a second tool retracting area is arranged on the upper surface of the first tool retracting area,

123. the first cut-off surface of the first cutting-off surface,

124. a second sealing surface, which is provided with a sealing surface,

200. and (5) connecting pipes.

Detailed Description

The following description of specific embodiments is provided in connection with the accompanying drawings.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model. Thus, the following detailed description of the embodiments of the utility model, as 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.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in the following figures.

Example 1

See fig. 1 and 2. The direct connection filling sleeve described in this embodiment comprises a plurality of sequentially connected pipe bodies 100, wherein external threads 111 and/or internal threads 121 are arranged at two ends of each pipe body, one end provided with the external threads is a male end 110, and the other end provided with the internal threads is a female end 120. The two ends of the pipe body 100 are provided with external threads 111 and/or internal threads 121 in three cases: one end of the pipe body 100 is provided with an external thread 111, the other end is provided with an internal thread 121, or both ends of the pipe body 100 are provided with external threads 111, or both ends of the pipe body 100 are provided with internal threads 121. When both ends of a pipe body are external threads 111, at least one end of the pipe body connected with the external threads is provided with internal threads 121, so that the two pipe bodies can be connected in a threaded manner.

The external thread 111 of the first pipe body is in threaded engagement with the internal thread 121 of the second pipe body, the inner wall of the first pipe body is flush with the inner wall of the second pipe body, and no gap or step exists between the connecting parts of the two mutually connected pipe bodies, so that the slurry does not generate vortex when flowing in the pipeline.

In a further embodiment, specifically, the end surface of the male end 110 of the first pipe body is provided with a first sealing surface 113, the threaded stop position of the female end 120 of the second pipe body is provided with a first stop surface 123, and the first sealing surface 113 is in seamless fit when connected with the first stop surface 123.

As shown in fig. 1 and 2, the first sealing surface 113 and the first blocking surface 123 are planar surfaces. Of course, the first sealing surface and the first blocking surface may be two conical surfaces that can be completely and seamlessly bonded to each other.

The provision of the first sealing surface 113 and the first stop surface 123 can improve the sealing effect at the junction of the first pipe body and the second pipe body on the one hand, and increase the thickness of the inner wall of the pipe body on the other hand. The pipeline is continuously worn in the service process, and the starting time of the worn threads can be delayed.

Referring to fig. 1 and 2, the external thread 111 is a taper pipe thread, and the internal thread 121 is also a taper pipe thread, and the threads extend from the outer diameter of the pipe to the inner diameter. The thread extends from the outer diameter to the inner diameter of the pipeline, and the thread extends from the outer wall of the pipeline to the inner diameter direction, or a step is arranged on the outer wall of the pipeline first and then extends to the inner diameter direction. The case shown in fig. 1 and 2 is that a step is provided on the outer wall of the pipe, and then extends in the inner diameter direction. Further, the external thread 111 forming teeth are provided with 8mm relief areas 112; the internal thread 121 forming teeth are provided with 8mm relief areas 122.

In one embodiment, the outer wall of the first pipe body is flush with the outer wall of the second pipe body, no clamp is arranged at the pipe end of the pipe, the outer diameter and the wall thickness of the pipe can be designed to be larger under the condition of the same annular gap, and the service life of the pipe is prolonged while the transmission efficiency is increased. The threaded stop position of the male end 110 of the first pipe body is provided with a second stop surface 114, the end surface of the female end 120 of the second pipe body is provided with a second sealing surface 124, and the second stop surface 114 is attached to the second sealing surface 124.

In this embodiment, the external thread 111 and the internal thread 121 are buttress threads, or the external thread 111 and the internal thread 121 are round threads.

In this embodiment, the taper of the taper pipe thread is 1:3-17, preferably 1:4.5, the pitch is 4-6 teeth/in, preferably 5 teeth/in.

As a preferred embodiment, the steel used to manufacture the pipe body 100 in this embodiment may be a higher grade of wear resistant steel, such as pipe body steel grade 150, with a yield strength of 950-1100 MPa and a surface hardness of HRC 35-55.

Example 2

See fig. 1 and 3. The first tube in this example is identical to the first tube described in example 1. Differently, in this embodiment, the outer wall of the first pipe body is not flush with the outer wall of the second pipe body, both ends of the first pipe body are respectively provided with external threads 110, both ends of the second pipe body are respectively provided with internal threads 120, and the second pipe body is a coupling 200. The collar 200 has an outer diameter that is greater than the outer diameter of the first tubular body. When the second pipe body is a coupling 200, no step is arranged in the coupling 200, namely, a first stop surface 123 is not arranged, and the first sealing surface 113 of the first pipe body is in seamless joint with the first sealing surface 113 of the other first pipe body when in connection; or a step is arranged in the coupling 200, the two sides of the step are respectively provided with a first stop surface 123, and the first sealing surface 113 and the first stop surface 123 are in seamless fit when being connected. The threaded connection combines the existing installation filling pipe installation equipment, and the clamp design is reserved, so that the common elevator can well fix the pipe body in the well descending process, the pipe well is prevented from falling due to improper operation, and the pipe body locking and fixing chuck device is not required to be arranged in the field operation to prevent the pipe well from falling.

Example 3

In a further embodiment, on the basis of example 1 or 2, the external thread 111 and/or the internal thread 121 are coated with a thread compound layer. The thread grease is based on oil-based grease, and consists of various additives and solid fillers such as metallic lead, zinc, copper, graphite powder and the like. The screw thread connecting device is mainly used for screw thread connecting parts and can play roles of auxiliary lubrication, sealing and protection.

Example 4

This example is a specific application example based on the direct connection type filling sleeve described in example 1.

In this example, a bainitic abrasion-resistant steel pipe having a lower bainitic structure was selected, and the allowable deviation of chemical composition of the bainitic abrasion-resistant steel pipe was as shown in table 1. The steel grade of the pipe body is 150, the yield strength is 1000MPa, and the surface hardness is HRC45.

TABLE 1 Primary chemical composition of bainitic wear-resistant Steel pipes

The technological test of the bainite abrasion-resistant steel pipe meets the requirements specified in GB/T8163-2008 and GB/T17395-2008.

The inner and outer surfaces of the steel pipe must not have cracks, folds, rolls, separation layers and scabs. These defects must be completely removed where the actual wall thickness must not be less than the minimum allowed by the wall thickness.

The thread technical parameters are shown in table 2 below:

table 2 thread technical parameter table

Outer diameter/mm	152
		Wall thickness/mm	22
Air-tight fastener	TP-FJ
		Inner diameter of pipeline	108
Teeth per inch	5
		Taper of screw thread	1:4.5
Joint and pipe body inside and outside	Flush
		Angle of thread bearing surface	3°
Angle of thread lead-in face	10°
		Thread height/mm	1.575
Taper of sealing surface (diameter)	1:10；1:6
		Seal thread length/mm	100
Weight per meter/' kg	75

。

The direct connection type filling sleeve has the minimum torque of 2500N.M, the optimal torque of 5000N.M, the maximum torque of 12000 and the connection strength of 4500kN, and can bear the tensile weight of 450t and resist the internal water strength of 72Mpa. The connection strength is 510, the internal pressure resistance strength is 167MPa, the working flow corresponds to the flow speed of 6m/s, and the annular gap of the round well is 23mm.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the utility model, and the scope of the utility model should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims (10)

1. The utility model provides a direct connection type filling sleeve, its characterized in that includes many body that connect in order, body surface hardness is HRC35~55, the both ends of body are provided with external screw thread and/or internal screw thread, and the external screw thread of first body and the internal screw thread of second body are closed, first body inner wall and the internal wall parallel and level of second body, the external screw thread is the taper pipe screw thread, the internal screw thread is the taper pipe screw thread, the tapering of taper pipe screw thread is 1:3~17, and the screw thread extends from the pipeline external diameter to internal diameter.

2. The direct connection filling sleeve according to claim 1, wherein a male end face of the first pipe body is provided as a first sealing face, a female end thread stop of the second pipe body is provided with a first stop face, and the first sealing face is attached to the first stop face.

3. The direct connection filling sleeve of claim 2, wherein the first sealing surface and the first shut-off surface are planar or the first sealing surface and the first shut-off surface are conical surfaces.

4. The direct connection filling sleeve according to claim 1 or 2, wherein the external thread is a buttress thread or a round thread and the internal thread is a buttress thread or a round thread.

5. The direct connection filling sleeve of claim 4, wherein the pitch of the taper pipe thread is 4-6 teeth/in.

6. The direct connection filling sleeve according to claim 1, wherein the steel tube grade 150 has a yield strength of 950-1100 mpa.

7. The direct-connect filling sleeve of claim 5, wherein the external thread forming teeth are provided with 8mm relief areas; the internal thread forming teeth are provided with 8mm tool withdrawal areas.

8. The direct connection filling sleeve according to claim 1 or 2, wherein the outer wall of the first pipe body is flush with the outer wall of the second pipe body, a second stop surface is arranged at the stop position of the male end thread of the first pipe body, the female end face of the second pipe body is provided as a second sealing surface, and the second stop surface is attached to the second sealing surface.

9. The direct connection filling sleeve according to claim 1 or 2, wherein both ends of the first pipe body are provided with external threads, both ends of the second pipe body are provided with internal threads, and the second pipe body is a coupling.

10. The direct connection filling sleeve according to claim 1, wherein the external thread and/or the internal thread are/is coated with a thread grease layer.