阅读说明：本技术 一种适用于管道正负压运输的管道连接结构 (Pipeline connection structure suitable for transportation of positive and negative pressure of pipeline ) 是由 蔡潘祥 翟建刚 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种适用于管道正负压运输的管道连接结构,包括管件,其连接端上设有环形凸肩；还包括：固定圈,其上下两端均设有安装槽；管件的连接端插装在固定圈内；压圈,设置在环形凸肩之间,设置在固定圈的上下端面上,压圈的端面与安装槽的端面围成密封槽；密封圈,设置在密封槽内,密封圈上设有多个密封侧面,密封侧面分别与密封槽的各个侧面和管件的外侧面相对设置,密封圈侧面上设有密封凸条,密封凸条与密封槽的各个侧面和管件的外侧面接触设置,形成密封面；压盖,扣装固定在固定圈的外侧面上。本发明,结构简单,安装方便,密封面不与管道介质直接接触,延长了管道连接结构的使用寿命,降低了管道连接结构的安装和维修成本。(The invention discloses a pipeline connecting structure suitable for pipeline positive and negative pressure transportation, which comprises a pipe fitting, wherein an annular convex shoulder is arranged on a connecting end of the pipe fitting; further comprising: the upper end and the lower end of the fixing ring are provided with mounting grooves; the connecting end of the pipe fitting is inserted into the fixing ring; the pressing ring is arranged between the annular convex shoulders and arranged on the upper end surface and the lower end surface of the fixing ring, and a sealing groove is formed by the end surface of the pressing ring and the end surface of the mounting groove in a surrounding manner; the sealing ring is arranged in the sealing groove, a plurality of sealing side faces are arranged on the sealing ring, the sealing side faces are respectively arranged opposite to each side face of the sealing groove and the outer side face of the pipe fitting, a sealing convex strip is arranged on the side face of the sealing ring, and the sealing convex strip is arranged in contact with each side face of the sealing groove and the outer side face of the pipe fitting to form a sealing face; and the gland is buckled and fixed on the outer side surface of the fixing ring. The invention has simple structure and convenient installation, the sealing surface is not in direct contact with the pipeline medium, the service life of the pipeline connecting structure is prolonged, and the installation and maintenance cost of the pipeline connecting structure is reduced.)

1. The pipeline connecting structure suitable for positive and negative pressure transportation of the pipeline is characterized by comprising a pipe fitting, wherein an annular convex shoulder is arranged on the connecting end of the pipe fitting; further comprising:

the upper end and the lower end of the fixing ring are provided with mounting grooves; the connecting end of the pipe fitting is inserted into the fixing ring;

the pressing ring is arranged between the annular convex shoulders, the pressing ring is arranged on the upper end surface and the lower end surface of the fixing ring, and a sealing groove is formed by the end surface of the pressing ring and the end surface of the mounting groove in a surrounding manner;

the sealing ring is arranged in the sealing groove, a plurality of sealing side faces are arranged on the sealing ring and are respectively opposite to each side face of the sealing groove and the outer side face of the pipe fitting, a sealing convex strip is arranged on the side face of the sealing ring and is in contact with each side face of the sealing groove and the outer side face of the pipe fitting to form a sealing face;

and the gland is buckled and fixed on the outer side surface of the fixing ring.

2. The pipeline connecting structure suitable for pipeline positive and negative pressure transportation according to claim 1, wherein annular convex edges are arranged at the upper end and the lower end of the fixing ring, and the annular convex edges and the end surface of the fixing ring enclose the mounting groove;

the clamping ring is arranged on the annular convex edge and surrounds a sealing groove with the mounting groove.

3. The pipeline connecting structure suitable for pipeline positive and negative pressure transportation according to claim 2, wherein the outer side surface of the annular convex edge is provided with a lower inclined part; and the pressing ring is provided with an upper inclined part matched with the lower inclined part.

4. The pipe connection structure suitable for positive and negative pressure transportation of pipes according to claim 1, wherein the fixing ring is provided with an annular shoulder seat, and the annular shoulder is arranged on the annular shoulder seat.

5. The pipe connection structure for positive and negative pressure transportation of pipes according to claim 1, wherein said sealing rib has an arc-shaped cross section.

6. The pipe connection structure suitable for positive and negative pressure transportation of pipes according to claim 1, wherein the gland comprises a left gland and a right gland which are arranged in a buckling manner, and the left gland and the right gland each comprise:

the two gland panels are buckled and fixed through bolts;

the gland body is arranged on the side surface of the gland panel, the two gland bodies form a gland cavity in an enclosing mode, and the pressing ring and the fixing ring are arranged in the gland cavity; the upper end and the lower end of the gland body are provided with openings.

7. The pipe connection structure suitable for positive and negative pressure transportation of pipes as claimed in claim 6, wherein the fastening end surface of the gland plate is provided with a connection stiffening part.

8. The pipe connection structure suitable for positive and negative pressure transportation of pipes according to claim 6, wherein the opening of the gland body is provided with an annular stiffening portion, and the annular stiffening portion is protruded outwards along the radial direction of the gland body.

Technical Field

The invention relates to the technical field of pipelines, in particular to a pipeline connecting structure suitable for pipeline positive and negative pressure transportation.

Background

Pipeline transportation is a transportation mode for long-distance transportation of liquid and gas materials by using pipelines as transportation tools, is a transportation mode for transporting petroleum, coal and chemical products to markets from production places, and is a special component part for trunk transportation in a uniform transportation network.

Common conveying modes of pipeline transportation comprise positive pressure conveying and negative pressure conveying, wherein the positive pressure conveying is to introduce compressed air into a conveying pipeline by using a fan at the starting point of a system, and to make the air flow in the pipeline and drive materials to move by using the pressure difference between the starting point and the ending point of the pipeline; the negative pressure conveying system is powered by the pressure difference between negative pressure and outside produced by the running of the wind inducing device at the tail end of the conveying system, so that outside air is sucked into the pipeline, and materials are brought into the pipeline along with the movement of the air.

Therefore, chinese patent CN11309075A provides a positive and negative pressure sealing ring and a pipeline connection structure, wherein the positive and negative sealing ring includes: a seal ring body, the seal ring body comprising: the end face sealing boss is formed on the inner wall of the sealing ring body and extends inwards; global sealed boss, global sealed boss forms the inner wall of sealing washer body is inwards stretched out, all sealed bosses include first terminal surface and second terminal surface, first terminal surface orientation the end face sealed boss, form the malleation effect groove on the first terminal surface, the malleation effect groove sets up the adjacent one side of sealing washer body of all sealed bosses, be formed with the negative pressure effect groove on the second terminal surface. According to the scheme, the positive and negative sealing rings are enabled to tightly press the pipe fitting through the positive and negative pressure action grooves, and the sealing performance of the positive and negative pressure sealing rings is improved to a certain extent.

However, the above solution has the following disadvantages:

(1) the structure of the scheme is complex, the end face sealing boss and the peripheral face sealing boss are both arranged on the inner wall of the sealing ring body, the structure is very inconvenient to produce, and the production procedures are increased;

(2) the end face sealing boss and the peripheral face sealing boss are easy to deform or cut by the pipe fitting and damage in the process of pipe fitting installation, or the end face sealing boss is in direct contact with the end face of the pipe fitting and is easy to wear, so that the sealing effect and the service life of the pipeline connecting structure are influenced;

(3) the end face sealing boss and the circumferential sealing boss are integrally formed with the sealing ring body, when the end face sealing boss and the circumferential sealing boss are abraded, the whole sealing ring needs to be replaced, the replacement process is complex, normal transportation of a pipeline is affected, and the maintenance cost of the pipeline sealing structure is increased.

In view of this, it is urgently needed to improve the existing pipeline structure suitable for positive and negative pressure so as to improve the pressure bearing capacity of the positive and negative sealing rings and the pipeline, prolong the service life of the positive and negative sealing rings and the pipeline, and reduce the production cost and the maintenance cost of the positive and negative sealing rings and the pipeline.

Disclosure of Invention

The invention aims to solve the technical problems of complex structure, high production cost and short service life of the existing pipeline structure suitable for positive pressure and negative pressure.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a pipeline connecting structure suitable for pipeline positive and negative pressure transportation comprises a pipe fitting, wherein an annular convex shoulder is arranged on the connecting end of the pipe fitting; further comprising:

the upper end and the lower end of the fixing ring are provided with mounting grooves; the connecting end of the pipe fitting is inserted into the fixing ring;

the pressing ring is arranged between the annular convex shoulders, the pressing ring is arranged on the upper end surface and the lower end surface of the fixing ring, and a sealing groove is formed by the end surface of the pressing ring and the end surface of the mounting groove in a surrounding manner;

the sealing ring is arranged in the sealing groove, a plurality of sealing side faces are arranged on the sealing ring and are respectively opposite to each side face of the sealing groove and the outer side face of the pipe fitting, a sealing convex strip is arranged on the side face of the sealing ring and is in contact with each side face of the sealing groove and the outer side face of the pipe fitting to form a sealing face;

and the gland is buckled and fixed on the outer side surface of the fixing ring.

In the above scheme, preferably, annular convex edges are arranged at the upper end and the lower end of the fixing ring, and the annular convex edges and the end surface of the fixing ring enclose the mounting groove;

the clamping ring is arranged on the annular convex edge and surrounds a sealing groove with the mounting groove.

In the above aspect, preferably, a lower inclined portion is provided on an outer side surface of the annular convex edge; and the pressing ring is provided with an upper inclined part matched with the lower inclined part.

In the above scheme, preferably, an annular shoulder seat is arranged on the fixing ring, and the annular shoulder is arranged on the annular shoulder seat.

In the above aspect, preferably, a cross section of the sealing rib is arc-shaped.

In the above scheme, it is preferred, the gland includes left gland and the right gland that the lock set up, left side gland with right gland all includes:

the two gland panels are buckled and fixed through bolts;

the gland body is arranged on the side surface of the gland panel, the two gland bodies form a gland cavity in an enclosing mode, and the pressing ring and the fixing ring are arranged in the gland cavity; the upper end and the lower end of the gland body are provided with openings.

In the above scheme, preferably, the end face of the gland panel which is buckled and arranged is provided with a connection stiffening part.

In the above scheme, preferably, an opening of the gland body is provided with an annular stiffening portion, and the annular stiffening portion is arranged along the radial direction of the gland body in a protruding manner.

Compared with the prior art, the pipeline connecting structure suitable for pipeline positive and negative pressure transportation provided by the invention has the advantages that the sealing groove is formed by matching the fixing ring and the pressing ring, the sealing ring is arranged in the sealing groove, and the side surface of the sealing groove and the pipe fitting are arranged in a contact manner through the sealing raised line, so that a plurality of sealing surfaces which are tightly connected exist in the pipeline structure no matter in positive pressure transportation or negative pressure transportation, and the sealing property of the joint of the pipe fitting is improved. In the invention, the sealing grooves are arranged at the upper end and the lower end of the fixing ring, and the joint of the pipe fitting is not in direct contact with the sealing surface, so that the abrasion condition of the sealing surface is greatly reduced, the service life of the sealing ring is prolonged, and the sealing effect of the sealing surface is improved.

The invention has simple structure and convenient use, greatly reduces the requirement on the production precision of the sealing ring, reduces the production cost of the sealing ring and has good economic benefit.

Drawings

FIG. 1 is a schematic view of a pipeline connecting structure suitable for pipeline positive and negative pressure transportation according to the present invention, which is disassembled;

FIG. 2 is a schematic cross-sectional view of a pipe connection structure suitable for positive and negative pressure transportation of pipes according to the present invention;

FIG. 3 is an assembly view of the pipe connection structure suitable for positive and negative pressure transportation of the pipe according to the present invention;

fig. 4 is a schematic structural view of a fixing ring and a pressing ring in the invention.

The correspondence between the names and reference numbers of the components in fig. 1 to 4 is as follows:

the pipe fitting comprises a pipe fitting 1, a fixing ring 2, a pressing ring 3, a sealing ring 4, a gland 5, an annular shoulder 11, a mounting groove 21, a sealing groove 20, an annular convex edge 22, a lower inclined part 23, an upper inclined part 31, an annular shoulder seat 32, a sealing side surface 41, a sealing convex strip 42, a left gland 51, a right gland 52, a gland panel 53, a gland body 54, an opening 541, a gland cavity 50, a connecting stiffening part 531 and an annular stiffening part 542.

Detailed Description

The invention provides a pipeline connecting structure suitable for positive and negative pressure transportation of pipelines, which is simple in structure and convenient to install, a sealing surface is not in direct contact with a pipeline medium, the service life of the pipeline connecting structure is prolonged, and the installation and maintenance cost of the pipeline connecting structure is reduced. The invention is described in detail below with reference to the drawings and the detailed description.

As shown in fig. 1, 2, 3 and 4, the pipe connection structure suitable for positive and negative pressure transportation of a pipe provided by the invention comprises a pipe fitting 1, a fixing ring 2, a pressing ring 3, a sealing ring 4 and a pressing cover 5.

Be equipped with annular convex shoulder 11 on the link of pipe fitting 1, retainer plate 2 is the annular, and the upper end and the lower extreme of retainer plate 2 all are equipped with mounting groove 21, and the link cartridge of pipe fitting 1 is in retainer plate 2. The pressing ring 3 is arranged between the annular convex shoulders 11 of the two pipe fittings 1, the bottom surface of the pressing ring 3 is arranged on the end surface of the fixing ring 2, and the pressing ring 3 and the end surface of the fixing ring 2 enclose a sealing groove 20.

Since the upper end and the lower end of the fixing ring 2 are the same, the structure of the fixing ring 2 and the pressing ring 3 will be described by taking only the upper end of the fixing ring 2 as an example.

The upper end face of retainer plate 2 is equipped with annular protruding edge 22 on, and clamping ring 3 sets up on the upper end face of annular protruding edge 22, encloses into seal groove 20 with annular protruding edge 21, and seal groove 20 sets up along the medial surface of retainer plate 2.

In another embodiment of the present invention, the outer side surface of the annular flange 22 is provided with a lower inclined portion 23, and the lower inclined portion 23 is inclined inward from bottom to top. The pressing ring 3 is provided with an upper inclined part 31 on the bottom surface, the upper inclined part 31 is arranged on the lower inclined part 23 and is matched with the lower inclined part 23, so that the pressing ring 3 and the fixing ring 2 are tightly connected, and the sealing performance of the sealing groove 20 is improved.

In another embodiment of the present invention, the fixing ring 2 is sleeved on the pipe fitting 1, the end surface of the fixing ring 2 contacting the annular shoulder 11 is provided with an annular shoulder seat 32, and the annular shoulder 11 is arranged in the annular shoulder seat 32, so that the stability of the pipeline connection structure and the sealing performance between the pipe fitting 1 and the fixing ring 2 are improved.

The sealing ring 4 is arranged in the sealing groove 20, the sealing ring 4 is annular, a plurality of sealing side faces 41 are arranged on the sealing ring 4, each sealing side face 41 is provided with a sealing convex strip 42, the sealing side faces 41 are arranged opposite to the side faces of the sealing groove 20 and the outer side face of the pipe fitting 1, and the sealing convex strips 42 are arranged in contact with the side faces of the sealing groove 20 and the outer side face of the pipe fitting to form a sealing face.

Gland 5 includes left gland 51 and the right gland 52 of lock setting, and left gland 51 and right gland 52 all include gland panel 53 and set up gland body 54 on gland panel 53, and left gland 51 and the gland panel 53 lock of right gland 52 set up, and gland body 54 sets up on the side of gland panel 53. The upper and lower both ends of gland body 54 all are equipped with opening 541, and pipe fitting 1 passes through opening 541 to set up in gland 5. The gland bodies 54 of the left gland 51 and the right gland 52 enclose a gland cavity 50, and the gland cavity 50 is arranged on the periphery of the inner pipe fitting 1, the fixing ring 2 and the pressing ring 3.

In another embodiment of the present invention, the end surface of the gland panel 53 where the gland panel 53 is fastened is provided with a connection stiffening portion 531, and the connection stiffening portion 531 is disposed perpendicular to the gland panel 53 for improving the structural strength and the force-bearing capacity of the gland panel 53.

In another embodiment of the present invention, an annular stiffening portion 542 is provided at the opening 541 of the gland body 54, and the annular stiffening portion 542 is provided to protrude outward in the radial direction of the gland body 54 for improving the structural strength of the gland body 54.

Compared with the prior art, the pipeline connecting structure suitable for pipeline positive and negative pressure transportation provided by the invention has the advantages that the annular convex shoulder is arranged on the pipe fitting, the connecting end of the pipe fitting, the fixing ring, the gland and the sealing ring are limited in the gland cavity through the gland and the annular convex shoulder, and the sealing ring is provided with the plurality of sealing convex strips which are in sealing contact with the side surface of the sealing groove and the side wall of the pipe fitting, so that the pipe fitting can form a reliable sealing surface no matter under the working condition of positive pressure transportation or negative pressure transportation, and the sealing structure has good sealing property.

The pipeline connecting structure provided by the invention has a simple structure and is convenient to install, the sealing groove is defined by the fixing ring and the pressing ring, and the fixing ring and the pressing ring adopt a split design, so that the installation of the sealing ring is convenient, and the worn sealing ring is convenient to replace or the pipeline connecting structure is convenient to maintain; meanwhile, the medium in the pipe fitting is not in direct contact with the sealing ring, so that the abrasion of the sealing ring is reduced, and the service life of the sealing ring is prolonged.

According to the invention, the section of the sealing convex strip of the sealing ring is arc-shaped, so that the installation of the pipe fitting is convenient, the damage to the internal structure of the sealing ring caused by cutting the sealing convex strip in the installation process of the pipe fitting can be effectively avoided, and the stability of the pipeline connection structure is improved.

The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.