CN216923561U - Petrochemical industry pipeline flange joint device convenient to use - Google Patents

Abstract

The utility model discloses a petrochemical pipeline flange connecting device convenient to use, wherein the outer side walls of any two connected flange plates are respectively provided with a main connecting plate and an auxiliary connecting plate, the through hole of a bolt is provided with an internal thread, a plurality of polygonal bolt connecting holes are uniformly arranged on the flange plate, the main connecting plate and the auxiliary connecting plate, a bolt column passes through the bolt connecting hole on the main connecting plate and is screwed on the bolt column, the external thread of the bolt is in threaded connection with a central sleeve column, the central sleeve column is arranged in the bolt connecting holes on the two corresponding flange plates in a penetrating way, the bolt column is arranged through the bolt connecting hole on the auxiliary connecting plate, a bolt column is sleeved on the bolt column through the through hole, the external thread of a bolt column is in threaded connection with the central sleeve column, the flange plate is clamped by the main connecting plate and the auxiliary connecting plate by screwing the bolt column, and higher tightness can be ensured in the connecting process of the flange plates, and the bolt in the later maintenance work can be conveniently disassembled and reassembled.

Description

Petrochemical industry pipeline flange joint device convenient to use

Technical Field

The utility model relates to the technical field of petrochemical industry, in particular to a petrochemical pipeline flange connecting device convenient to use.

Background

Petrochemical industry, petrochemical for short. Generally, in the chemical industry using petroleum and natural gas as raw materials, the range is wide, a lot of products are produced, crude oil is cracked, reformed and separated, and then is transported to a designated place through a petroleum pipeline, the laying mode of the petroleum pipeline is determined according to the transmission distance and is formed by connecting a plurality of sections of petroleum pipelines, and a transfer pump is installed at a laying position of the petroleum pipeline to ensure that the petroleum has enough speed in the transportation process.

As described above, each section of petroleum pipeline is connected by a flange, and the pipeline flanges are classified into the following six basic types according to the connection mode with the pipeline: the flange connection is a detachable joint which is formed by respectively fixing two pipelines, pipe fittings or equipment on a flange plate, then adding a flange pad between the two flange plates and finally tightening the two flange plates by bolts to tightly combine the two flange plates, and can realize the connection between the static pipeline and the equipment which rotates or reciprocates.

However, when the petroleum pipeline is in the process of transmitting crude oil for a long time, absolute stability and sealing performance need to be guaranteed between flange plates, large torsion is applied to screwed bolts, impurities such as oil stains are attached to the bolts after long-term use, or the bolts are difficult to detach, or the bolts slip, so that maintenance work is affected, and therefore the petrochemical pipeline flange connecting device convenient to use is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a petrochemical pipeline flange connecting device convenient to use, which can ensure higher sealing performance in the flange plate connecting process and is convenient for dismounting and reassembling bolts in the subsequent maintenance work in the using process.

The technical purpose of the utility model is realized by the following technical scheme:

a petrochemical engineering pipeline flange connecting device convenient to use comprises an oil conveying pipe and flange plates connected to two ends of the oil conveying pipe, wherein the oil conveying pipe is connected through the flange plates, the outer side walls of any two connected flange plates are respectively provided with a main connecting plate and an auxiliary connecting plate, and the two connected flange plates are connected through high-strength bolts to clamp the flange plates;

the high-strength bolt comprises a bolt column, a central sleeve column, a first bolt and a second bolt, wherein the first bolt and the second bolt are provided with through holes, an internal thread is arranged on the through hole of the first bolt, a plurality of bolt connecting holes are uniformly distributed on the flange plate, the main connecting plate and the auxiliary connecting plate and respectively correspond to the bolt connecting holes, the bolt connecting holes are polygonal, the bolt column penetrates through the bolt connecting holes on the main connecting plate, the first bolt is screwed on the bolt column through the through hole with the internal thread to clamp the main connecting plate, the external thread of the first bolt is connected with the internal thread at the left end of the central sleeve column, the central sleeve column is matched with the bolt connecting holes and penetrates through the bolt connecting holes on the two corresponding flange plates, the bolt column penetrates through the right end of the central sleeve column and penetrates through the bolt connecting holes on the auxiliary connecting plate, and the second bolt is sleeved on the bolt column through the through hole, and the external thread of the second bolt is connected with the internal thread at the right end of the central sleeve column, and the flange plate is clamped by the main connecting plate and the auxiliary connecting plate by screwing the second bolt.

Preferably, a bolt includes the internal nut and holds with the first screw that the internal nut is connected, No. two bolts include the external nut and hold with the second screw that the external nut is connected, be equipped with the internal thread on the through-hole inner wall of internal nut, the internal nut is screwed up on the bolt post, first screw end and central sleeve post left end department internal thread connection, second screw end and external nut pass through the through-hole cover and establish on the bolt post, and the external screw thread and the central sleeve post right-hand member department internal thread connection of second screw end are through screwing up No. two bolts in order to realize main connection pad, assist the connection pad and press from both sides tight ring flange.

Preferably, the inner wall of the through hole of the outer nut is provided with internal threads, and the outer nut is screwed on the bolt column.

Preferably, the left end of the bolt column is provided with a partial thread, and the inner nut is in threaded connection with the partial thread of the bolt column.

Preferably, an annular sealing groove is formed in the inner side wall of the flange plate.

Preferably, the main connecting disc and the auxiliary connecting disc are both annular, and the main connecting disc and the auxiliary connecting disc are equally divided into two halves.

Preferably, the main connecting disc and the auxiliary connecting disc are both provided with an inward end and an outward end, the inward ends and the outward ends on the main connecting disc and the auxiliary connecting disc are distributed in a staggered manner, and bolt connecting holes on the main connecting disc and the auxiliary connecting disc are both positioned on the outward ends;

the bottom surface of the inward end on the main connecting disc is flush with the outer wall of the flange plate, a cavity is formed between the outward convex end on the main connecting disc and the outer wall of the flange plate, and the inner nut is positioned in the cavity; a cavity is formed between the bottom surface of the inward end of the auxiliary connecting disc and the outer wall of the flange plate, and the outward convex end of the auxiliary connecting disc is flush with the outer wall of the flange plate.

Preferably, the first screw end and the second screw end are equal in length, and the central sleeve column is located between the main connecting disc and the auxiliary connecting disc.

Preferably, a connecting ring is arranged between the convex end of the auxiliary connecting disc and the flange, the connecting ring is connected with two metal strips, the tail ends of the two metal strips on the connecting ring are respectively welded on the inner walls of the adjacent sunken ends, and the second screw end penetrates through the connecting ring.

Compared with the prior art, the utility model has the following beneficial effects: the high-strength bolt is difficult for being stained with impurities such as oil stain, be difficult for appearing the smooth silk, difficult dismantlement scheduling problem, overall structure optimizes the high-strength bolt that tradition used, by the bolt post, central sleeve post, interior nut, first screw end, second screw end and outer nut are the connecting screw jointly combined, when fixing a position main connection dish and assisting the connection dish through high-strength bolt, can improve stability and leakproofness between the ring flange of adjacent position, and at the in-process of installation high-strength bolt or dismantlement high-strength bolt, can install actual conditions and go on respectively, for example, screw up interior nut or outer nut on the bolt post, under the effect of central sleeve post, guarantee interior nut and outer nut at the rotation in-process, the problem of smooth silk can not appear in whole high-strength bolt.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a split view of the main and auxiliary interface disk components of the present invention;

FIG. 3 is a disassembled view of the high strength bolt member and the auxiliary connection disc member of the present invention;

fig. 4 is a cross-sectional view of a high-strength bolt member of the present invention.

Reference numbers and corresponding part names in the drawings:

1. a flange plate; 2. a sealing groove; 3. connecting holes of bolts; 4. a high-strength bolt; 5. a main connecting disc; 6. an oil delivery pipe; 7. a connecting ring; 8. a metal strip; 9. an auxiliary connecting disc; 401. a bolt column; 402. a central sleeve column; 403. an inner nut; 404. a first screw end; 405. a second screw end; 406. an outer nut; 501. an invaginated end; 502. a convex end.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following examples and accompanying fig. 1-4, wherein the exemplary embodiments and descriptions of the present invention are only used for explaining the present invention and are not used as limitations of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

It will be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "a", "an", "two", "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of indicated technical features. Thus, a feature defined as "a number," "a first," "a second," may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The utility model relates to a petrochemical pipeline flange connecting device convenient to use, which comprises an oil conveying pipe 6 and flange plates 1 connected to two ends of the oil conveying pipe 6, wherein the oil conveying pipe 6 is connected through the flange plates 1, the outer side walls of any two connected flange plates 1 are respectively provided with a main connecting plate 5 and an auxiliary connecting plate 9, and the two connected flange plates 1 are connected through high-strength bolts 4 to clamp the flange plates 1;

the high-strength bolt 4 comprises a bolt column 401, a central sleeve column 402, a first bolt and a second bolt, wherein the first bolt and the second bolt are provided with through holes, internal threads are arranged on the through hole of the first bolt, a plurality of bolt connecting holes 3 are uniformly distributed on the flange plate 1, the main connecting plate 5 and the auxiliary connecting plate 9 and respectively correspond to the bolt connecting holes, the bolt connecting holes 3 are polygonal, the bolt column 401 penetrates through the bolt connecting holes 3 on the main connecting plate 5, the first bolt is screwed on the bolt column 401 through the through holes with the internal threads to clamp the main connecting plate 5, the external threads of the first bolt are connected with the internal threads at the left end of the central sleeve column 402, the central sleeve column 402 is matched with the bolt connecting holes 3 and penetrates through the bolt connecting holes 3 on the two corresponding flange plates 1, the bolt column 401 penetrates through the right end of the central sleeve column 402 and penetrates through the bolt connecting holes 3 on the auxiliary connecting plate 9, the second bolt is sleeved on the bolt column 401 through the through hole, the external thread of the second bolt is connected with the internal thread at the right end of the central sleeve column 402, and the flange plate 1 is clamped by the main connecting plate 5 and the auxiliary connecting plate 9 by screwing the second bolt.

Preferably, a bolt includes interior nut 403 and the first screw end 404 of being connected with interior nut 403, No. two bolts include outer nut 406 and the second screw end 405 of being connected with outer nut 406, be equipped with the internal thread on the through-hole inner wall of inner nut 403, interior nut 403 screws up on bolt post 401, first screw end 404 and central sleeve post 402 left end department internal thread connection, second screw end 405 and outer nut 406 are established on bolt post 401 through the through-hole cover, and the external screw thread of second screw end 405 and central sleeve post 402 right end department internal thread connection, through screwing up No. two bolts in order to realize main connection pad 5, assist connection pad 9 and press from both sides ring flange 1.

Preferably, the outer nut 406 is provided with an internal thread on the inner wall of the through hole, and the outer nut 406 is screwed on the bolt column 401.

Preferably, the left end of the bolt column 401 is provided with a partial thread, and the inner nut 403 is screwed on the partial thread of the bolt column 401.

Preferably, an annular sealing groove 2 is formed in the inner side wall of the flange plate 1.

Preferably, main connection pad 5 and assistance connection pad 9 all are the annular, just main connection pad 5 and assistance connection pad 9 are equallyd divide into two halves and set up.

Preferably, the main connecting disc 5 and the auxiliary connecting disc 9 are both provided with an inward end 501 and an outward end 502, the inward ends 501 and the outward ends 502 on the main connecting disc 5 and the auxiliary connecting disc 9 are distributed in a staggered manner, and the bolt connecting holes 3 on the main connecting disc 5 and the auxiliary connecting disc 9 are both positioned on the outward ends 502;

the bottom surface of the inward end 501 on the main connecting disc 5 is flush with the outer wall of the flange plate 1, a cavity is formed between the outward convex end 502 on the main connecting disc 5 and the outer wall of the flange plate 1, and the inner nut 403 is positioned in the cavity; a cavity is formed between the bottom surface of the sunken end 501 on the auxiliary connecting disc 9 and the outer wall of the flange plate 1, and the outward convex end 502 on the auxiliary connecting disc 9 is flush with the outer wall of the flange plate 1.

Preferably, the first screw end 404 and the second screw end 405 are equal in opening length, and the central sleeve column 402 is located between the main connecting disc 5 and the auxiliary connecting disc 9.

Preferably, a connecting ring 7 is arranged between the convex end 502 of the auxiliary connecting disc 9 and the flange plate 1, two metal strips 8 are connected to the connecting ring 7, the tail ends of the two metal strips 8 on the connecting ring 7 are respectively welded to the inner walls of the adjacent concave ends 501, and the second screw end 405 is arranged through the connecting ring 7.

The working principle is as follows: in the installation process, the method comprises the following steps:

a: firstly, inserting a bolt column 401 into a position, corresponding to the bolt connecting hole 3, of one half of the main connecting disc 5 (the insertion position of the bolt column 401 is ensured to be right opposite to the outward convex end 502 on the main connecting disc 5), then screwing an inner nut 403 on the bolt column 401 to realize that a first bolt is installed on the main connecting disc 5 and clamps the main connecting disc 5, and finally sleeving a central sleeve column 402 on the bolt column 401, wherein the installation mode of the central sleeve column 402 is a mode of connecting a first bolt end 404 and a central sleeve column 402 in a threaded mode, force is applied to rotate the central sleeve column 402, so that the central sleeve column 402 is installed on the first bolt end 404, and at the moment, the bolt column 401 penetrates through the central sleeve column 402, and the main connecting disc 5 is installed in the mode;

b: repeating the operation to sleeve the two halves of the main connecting discs 5 on one flange plate 1 through the bolt connecting holes 3, then penetrating the bolt columns 401 outside the bolt connecting holes 3 on the outer convex ends 502 of the auxiliary connecting discs 9 (ensuring that the bolt columns 401 are just positioned at the central positions of the connecting rings 7), sleeve the second bolts on the bolt columns 401, and are in threaded connection with the central sleeve columns 402 through the second bolt ends 405 (the outer nuts 406 can also be in threaded connection with the bolt columns 401 in the application);

c: finally, torsion is continuously applied to the outer nut 406, so that the outer convex end 502 on the main connecting disc 5 is deformed (if the material hardness is large, the deformation is small) and is extruded to the position of the flange plate 1, the outer nut 406 drives the connecting ring 7 to approach to the other flange plate 1, the outer convex end 502 on the auxiliary connecting disc 9 is also deformed, and the metal strip 8 is pulled, so that the main connecting disc 5 and the auxiliary connecting disc 9 are ensured to have certain elastic potential energy and the two flange plates 1 are extruded, so that the two flange plates 1 are ensured to have higher tightness and stability in the fixing process, and after the installation is finished, the two halves of the main connecting disc 5 and the two halves of the auxiliary connecting disc 9 can be respectively welded into an integral ring;

in the disassembling process, the method is divided into the following parts:

d: since the bolt-connecting hole 3 and the center stud 402 are polygonal and the high-strength bolt 4 is mounted on the main connecting disc 5 through the inner nut 403, the position of the center stud 402 remains unchanged by rotating the outer nut 406 in the reverse direction, and the outer nut 406 is easily separated from the center stud 402 by the resilient force of the metal strip 8, thereby separating the auxiliary connecting disc 9;

e: at this time, the main connecting disc 5 and the auxiliary connecting disc 9 are not connected, so that the main connecting disc 5 can be pulled away from the flange plate 1 (the central sleeve column 402 is pulled out), and the problem of wire sliding does not occur in the whole disassembling and assembling process.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. A petrochemical engineering pipeline flange connecting device convenient to use comprises an oil conveying pipe (6) and flange plates (1) connected to two ends of the oil conveying pipe (6), wherein the oil conveying pipe (6) is connected through the flange plates (1), and the petrochemical engineering pipeline flange connecting device is characterized in that a main connecting plate (5) and an auxiliary connecting plate (9) are respectively arranged on the outer side walls of any two connected flange plates (1), and the two connected flange plates (1) are connected through high-strength bolts (4) to clamp the flange plates (1);

the high-strength bolt (4) comprises a bolt column (401), a central sleeve column (402), a first bolt and a second bolt, wherein the first bolt and the second bolt are provided with through holes, internal threads are arranged on the through hole of the first bolt, a plurality of bolt connecting holes (3) are uniformly distributed on the flange plate (1), the main connecting plate (5) and the auxiliary connecting plate (9) and respectively correspond to the bolt connecting holes, the bolt connecting holes (3) are polygonal, the bolt column (401) penetrates through the bolt connecting holes (3) in the main connecting plate (5), the first bolt is screwed on the bolt column (401) through the through hole with the internal threads to clamp the main connecting plate (5), the external thread of the first bolt is connected with the internal threads at the left end of the central sleeve column (402), the central sleeve column (402) is matched with the bolt connecting holes (3) and penetrates through the bolt connecting holes (3) in the two corresponding flange plates (1), bolt post (401) are worn out center sleeve post (402) right-hand member and are passed bolt connection hole (3) setting on assisting connection pad (9), No. two bolts are established on bolt post (401) through the through-hole cover, and No. two external screw threads of bolt and center sleeve post (402) right-hand member department internal thread connection, through screwing up No. two bolts in order to realize main connection pad (5), assist connection pad (9) and press from both sides tight ring flange (1).

2. The petrochemical pipeline flange connecting device convenient to use according to claim 1, wherein the first bolt comprises an inner nut (403) and a first screw end (404) connected with the inner nut (403), the second bolt comprises an outer nut (406) and a second screw end (405) connected with the outer nut (406), an internal thread is arranged on the inner wall of the through hole of the inner nut (403), the inner nut (403) is screwed on the bolt column (401), the first screw end (404) is in internal thread connection with the left end of the central sleeve column (402), the second screw end (405) and the outer nut (406) are sleeved on the bolt column (401) through the through hole, and the external thread of the second screw end (405) is in internal thread connection with the right end of the central sleeve column (402), and the main connecting disc (5) are realized by screwing the second bolt, The auxiliary connecting disc (9) clamps the flange (1).

3. The petrochemical pipeline flange connecting device convenient to use according to claim 2, wherein the outer nut (406) is provided with internal threads on the inner wall of the through hole, and the outer nut (406) is screwed on the bolt column (401).

4. The petrochemical pipeline flange connecting device convenient to use according to claim 2, wherein the left end of the bolt column (401) is provided with partial threads, and the inner nut (403) is screwed on the partial threads of the bolt column (401).

5. The petrochemical pipeline flange connecting device convenient to use according to claim 1, wherein an annular sealing groove (2) is formed in the inner side wall of the flange plate (1).

6. The petrochemical pipeline flange connecting device convenient to use according to claim 1, 2, 3, 4 or 5, characterized in that the main connecting disc (5) and the auxiliary connecting disc (9) are both ring-shaped, and the main connecting disc (5) and the auxiliary connecting disc (9) are both arranged in two halves.

7. The petrochemical pipeline flange connecting device convenient to use according to claim 2, 3 or 4, wherein the main connecting disc (5) and the auxiliary connecting disc (9) are provided with inward sunken ends (501) and outward convex ends (502), the inward sunken ends (501) and the outward convex ends (502) on the main connecting disc (5) and the auxiliary connecting disc (9) are distributed in a staggered mode, and the bolt connecting holes (3) on the main connecting disc (5) and the auxiliary connecting disc (9) are located on the outward convex ends (502);

the bottom surface of an inward end (501) on the main connecting disc (5) is flush with the outer wall of the flange plate (1), a cavity is formed between an outward convex end (502) on the main connecting disc (5) and the outer wall of the flange plate (1), and the inner nut (403) is positioned in the cavity; a cavity is formed between the bottom surface of the sunken end (501) on the auxiliary connecting disc (9) and the outer wall of the flange disc (1), and the outer convex end (502) on the auxiliary connecting disc (9) is flush with the outer wall of the flange disc (1).

8. The petrochemical pipeline flange connecting device convenient to use according to claim 2, wherein the opening lengths of the first screw end (404) and the second screw end (405) are equal, and the central sleeve column (402) is located between the main connecting disc (5) and the auxiliary connecting disc (9).

9. The petrochemical pipeline flange connecting device convenient to use according to claim 7, wherein a connecting ring (7) is arranged between the outward protruding end (502) on the auxiliary connecting disc (9) and the flange plate (1), the connecting ring (7) is connected with two metal strips (8), the tail ends of the two metal strips (8) on the connecting ring (7) are respectively welded on the inner walls of the close inward recessed ends (501), and the second screw end (405) is arranged through the connecting ring (7).

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