CN112112877A

CN112112877A - Special bolt for petrochemical industry

Info

Publication number: CN112112877A
Application number: CN202010944225.8A
Authority: CN
Inventors: 郭旺
Original assignee: Handan City Awesome Fasteners Manufacturing Co ltd
Current assignee: Handan City Awesome Fasteners Manufacturing Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2020-12-22

Abstract

The invention discloses a special bolt for petrochemical industry, which relates to the field of petrochemical industry and comprises a bolt head, a cylinder and a nut, wherein the bolt head and the cylinder are of an integrated structure, the nut is arranged below the bolt head, an external thread is arranged on the outer wall of a half area of the cylinder from bottom to top, and a threaded hole is arranged in the middle of the nut. According to the invention, through the arrangement of the first rubber gasket, the second rubber gasket, the movable strip, the spiral spring, the first anti-skid gasket body, the screw cap, the container, the connecting pipe, the electromagnetic valve, the input pipeline, the piston, the sealing ring, the connecting rod and the push head, the fastening effect can be improved, a certain loosening prevention effect is also achieved, in addition, the vibration energy can be weakened, the adverse effect of vibration on the fastening piece is reduced, the rusted part can be lubricated for facilitating the disassembly, in addition, the lubricating oil can be pressurized, and the lubricating oil can be uniformly and rapidly infiltrated into the gap between the cylinders.

Description

Special bolt for petrochemical industry

Technical Field

The invention relates to the field of petrochemical industry, in particular to a bolt special for petrochemical industry.

Background

Petrochemical refers to the chemical industry that uses petroleum and natural gas as raw materials. It should be of a wide range and have a wide range of derivatives. Crude oil is cracked, reformed, and separated to provide base feedstocks such as ethylene, propylene, butenes, butadiene, benzene, toluene, xylenes, naphthalene, and the like. From these base raw materials, various basic organic raw materials such as methanol, formaldehyde, ethanol, acetaldehyde, acetic acid, isopropanol, acetone, phenol, etc. can be produced. The bolt specially used in petrochemical industry is a special fastener product which is developed by adopting corrosion-resistant and heat-resistant materials and special processing according to the national standard and the use characteristics of petrochemical industry.

The special bolt of current petrochemical industry still has certain drawback in-service use, is applied to mechanical structure, and the vibration that produces when equipment moves transmits to the bolt, along with live time's increase, leads to the nut not hard up or even drops easily, influences the connection effect, and in addition, some bolts receive environmental factor to influence, appear phenomenons such as corrosion, lead to the nut to be difficult to dismantle, increase the dismouting degree of difficulty, influence the use.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a bolt special for the petrochemical industry, and can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a special bolt of petrochemical industry, includes bolt head, cylinder and nut, bolt head and cylinder formula structure as an organic whole, the nut sets up in the below of bolt head, the cylinder has seted up the external screw thread from down on the outer wall in up half region, the threaded hole is seted up at the middle part of nut, screw hole and external screw thread screw-thread fit, contain the container in the structure of nut.

Preferably, the bottom of bolt head is spliced and is fixed with first rubber packing ring, first antiskid groove has been seted up to the bottom of first rubber packing ring, the top of nut is spliced and is fixed with second rubber packing ring, second antiskid groove has been seted up at the top of second rubber packing ring, first antiskid groove is the annular with the outline in second antiskid groove.

Preferably, the shape of the top end face of the bolt head is a regular hexagon, a first diamond coating is arranged at the edge of the bolt head, a groove is formed in the top of the bolt head and is arranged in the middle, the groove is a regular hexagon, and a second diamond coating is arranged on the inner wall of the groove.

Preferably, the cylinder is provided with a mounting groove in the half area from top to bottom, the cylinder is provided with a limiting hole in the outer wall of the half area from top to bottom, and the inside of the limiting hole is communicated with the inside of the mounting groove.

Preferably, the inside of mounting groove is provided with the activity strip, the local part of activity strip passes spacing hole and protrudes to the outside of cylinder, the both ends of the bulge of activity strip are the inclined plane, the bulge fixed mounting of activity strip has first anti-skidding pad body.

Preferably, fixed mounting has first spring fixing base on the cell wall of mounting groove, the one side fixed mounting that the activity strip is located the mounting groove inside has the second spring fixing base, fixedly connected with coil spring between first spring fixing base and the second spring fixing base, fixed mounting has first side ear and second side ear on the activity strip, the length sum of first side ear, second side ear and activity strip is less than the length in spacing hole.

Preferably, the bottom end face of the nut is in the shape of a regular hexagon, a third diamond coating is arranged at the edge of the nut, and the specification size of the nut is the same as that of the bolt head.

Preferably, the outer wall fixedly connected with input pipeline of nut, the one end fixed mounting of input pipeline has interior tooth to connect, the middle part fixedly connected with connecting pipe of container, the middle part of connecting pipe is provided with the solenoid valve, the one end fixed mounting of connecting pipe has outer tooth to connect, interior tooth connects and outer tooth connects threaded connection, the inside of container is filled with lubricating oil.

Preferably, an annular channel is formed in the nut, the interior of the annular channel is communicated with the interior of the input pipeline, overflow channels are formed between the annular channel and the threaded hole, and the number of the overflow channels is four.

Preferably, the top end of the container is detachably provided with an end cover, a piston is slidably arranged in the container, the top of the piston is fixedly provided with a connecting rod, a push-pull head is arranged above the end cover, a through hole is formed in the middle of the end cover, and the top end of the connecting rod penetrates through the through hole and is fixedly connected with the bottom of the push-pull head.

Preferably, be provided with the screw between container and the end cover, the top of container is passed through the screw and is connected with the bottom of end cover is detachable, the fixed cover in middle part of piston is equipped with the sealing washer, the top of pushing away the pull head is glued and is fixed with the second anti-skidding pad body.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention has the advantages that through the arrangement of the first rubber gasket, the second rubber gasket, the movable strip, the spiral spring and the first anti-slip gasket body, the nut is installed on the cylinder in a threaded manner to lock two groups of workpieces, the first rubber gasket and the second rubber gasket are clamped tightly and deformed due to extrusion, meanwhile, the reaction force is generated by utilizing the compression rebound characteristic, the fastening effect is improved to a certain extent, the first anti-slip groove and the second anti-slip groove are respectively arranged on one sides of the first rubber gasket and the second rubber gasket, which are close to the workpieces, so that the friction force between the first rubber gasket and the workpieces is increased, the rotation resistance of the nut or the bolt head can be improved, a certain anti-loosening effect is achieved, in addition, the first rubber gasket and the second rubber gasket have excellent flexibility, the vibration energy can be weakened, the adverse effect of the vibration on the fastener is reduced, in addition, in the locking structure, the movable strip is positioned in a reserved hole, get into when reserving the hole inside, coil spring atress shrink, simultaneously, utilize compression resilience characteristic to produce reaction force, further improve fastening effect, cooperate with first rubber packing ring, second rubber packing ring, make bolt head, nut and cylinder homoenergetic weaken vibration energy, do benefit to the use.

2. The invention is characterized in that through the arrangement of the nut, the container, the connecting pipe, the electromagnetic valve, the input pipeline, the piston, the sealing ring, the connecting rod and the push-pull head, the interior of the nut is provided with an annular channel, an overflow channel is arranged between the annular channel and a threaded hole arranged in the middle of the nut, the container is internally provided with lubricating oil, when the nut and the cylinder are rusted and other adverse phenomena occur, the electromagnetic valve is controlled to be opened, the channel in the connecting pipe is unblocked, the lubricating oil enters the annular channel through the connecting pipe and the input pipeline and then reaches the gap between the nut and the cylinder through the overflow channel, the rusted part is lubricated for facilitating the disassembly, in addition, the connecting rod, the push-pull head and the piston are matched, the lubricating oil can be pressurized, the lubricating oil can uniformly and rapidly permeate into the gap between the nut, and the lubricating oil is prevented from pouring upwards from the piston at the edge of the piston when bearing pressure.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic view of a partial structure of a cylinder according to the present invention;

FIG. 3 is a schematic view of a partial structure of a cylinder according to the present invention;

FIG. 4 is an enlarged view of A of FIG. 2 in accordance with the present invention;

FIG. 5 is a schematic structural view of a first rubber gasket and a second rubber gasket of the present invention;

fig. 6 is a top view of the bolt head of the present invention;

FIG. 7 is a schematic view of the nut of the present invention;

FIG. 8 is an enlarged view of B of FIG. 7 in accordance with the present invention;

fig. 9 is a schematic view of the structure of the container of the present invention.

In the figure: 1. a bolt head; 2. a cylinder; 3. a nut; 4. an external thread; 5. a first rubber gasket; 6. a second rubber gasket; 7. a movable bar; 8. a first anti-skid pad body; 9. mounting grooves; 10. a limiting hole; 11. a first lateral ear; 12. a second lateral ear; 13. a first spring holder; 14. a second spring fixing seat; 15. a coil spring; 16. a first anti-slip groove; 17. a second anti-slip groove; 18. a first diamond coating; 19. a groove; 20. a second diamond coating; 21. a threaded hole; 22. a third diamond coating; 23. an annular channel; 24. an overflow channel; 25. an input pipe; 26. an internal thread joint; 27. an external thread joint; 28. a connecting pipe; 29. an electromagnetic valve; 30. a container; 31. an end cap; 32. pushing the pull head; 33. a connecting rod; 34. a piston; 35. a second anti-skid pad body; 36. and (5) sealing rings.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: a bolt special for petrochemical industry comprises a bolt head 1, a cylinder 2 and a nut 3, wherein the bolt head 1 and the cylinder 2 are of an integral structure, the nut 3 is arranged below the bolt head 1, an external thread 4 is arranged on the outer wall of the half area of the cylinder 2 from bottom to top, a threaded hole 21 is arranged in the middle of the nut 3, the threaded hole 21 is in threaded fit with the external thread 4, during assembly, the connected workpiece is positioned between the bolt head 1 and the nut 3, the cylinder 2 is inserted into a preformed hole arranged on the connected workpiece, and one end of the cylinder 2 provided with the external thread 4 protrudes towards the direction of the screw cap 3, and a common wrench or an Allen wrench is used, the bolt head 1 is operated to lead the nut 3 to be in threaded connection with the convex part of the cylinder 2, after the nut 3 is locked, the assembly of the work pieces is completed by clamping the work pieces to be joined in cooperation with the bolt head 1, and the screw cap 3 is structured to include the container 30.

Wherein, the bottom of the bolt head 1 is fixed with a first rubber gasket 5 by cementing, the bottom of the first rubber gasket 5 is provided with a first anti-slip groove 16, the top of the nut 3 is fixed with a second rubber gasket 6 by cementing, the top of the second rubber gasket 6 is provided with a second anti-slip groove 17, the outer contours of the first anti-slip groove 16 and the second anti-slip groove 17 are both annular, when the nut 3 is locked, the first rubber gasket 5 and the second rubber gasket 6 are clamped and deformed by extrusion, meanwhile, the compression rebound characteristic is utilized to generate a reaction force, the fastening effect is improved to a certain extent, the first anti-slip groove 16 and the second anti-slip groove 17 are respectively arranged on one sides of the first rubber gasket 5 and the second rubber gasket 6 close to the workpiece, the friction force between the first rubber gasket and the workpiece is increased, the rotation resistance of the nut 3 or the bolt head 1 can be improved, a certain anti-loosening effect is achieved, and the first rubber gasket 5 and the second rubber gasket 6 have excellent flexibility, the vibration energy can be weakened, and the adverse effect of vibration on the fastener is reduced.

Wherein, the shape of the terminal surface of top of bolt head 1 is regular hexagon, can use ordinary spanner to operate, the edge of bolt head 1 is provided with first diamond coating 18, the high characteristics of hardness have, can provide the protection for the edge of bolt head 1, reduce the wearing and tearing that produce when using spanner operation, recess 19 is seted up at the top of bolt head 1, and recess 19 sets up between two parties, recess 19 is regular hexagon, cooperate with allen spanner, can use allen spanner to operate, the inner wall of recess 19 is provided with second diamond coating 20, the high characteristics of hardness have, provide the protection for the recess 19 inner wall, reduce the wearing and tearing that produce when using spanner operation.

Wherein, mounting groove 9 has been seted up to cylinder 2 from the inside of down half region, and spacing hole 10 has been seted up on cylinder 2 from the outer wall of down half region, and the inside intercommunication of the inside of spacing hole 10 and mounting groove 9 for the installation component, and can carry on spacingly to the subassembly.

Wherein, the inside of mounting groove 9 is provided with activity strip 7, the local part of activity strip 7 passes spacing hole 10 and protrudes to the outside of cylinder 2, the both ends of the bulge of activity strip 7 are the inclined plane, when inclined plane department received pressure, can change the effort direction, force activity strip 7 towards the inside displacement of mounting groove 9, the bulge fixed mounting of activity strip 7 has first anti-skidding pad body 8, the design of first anti-skidding pad body 8 can improve the frictional force between self and the work piece preformed hole pore wall.

Wherein, a first spring fixing seat 13 is fixedly installed on the wall of the mounting groove 9, a second spring fixing seat 14 is fixedly installed on one side of the movable strip 7 positioned inside the mounting groove 9, a spiral spring 15 is fixedly connected between the first spring fixing seat 13 and the second spring fixing seat 14, in the locking structure, the movable strip 7 is positioned in a preformed hole formed on a workpiece, when entering the preformed hole, the spiral spring 15 is stressed to contract, meanwhile, a reaction force is generated by utilizing the compression and rebound characteristics, the fastening effect is further improved, the movable strip is matched with the first rubber gasket 5 and the second rubber gasket 6, so that the bolt head 1, the nut 3 and the cylinder 2 can weaken vibration energy, a first side lug 11 and a second side lug 12 are fixedly installed on the movable strip 7, the sum of the lengths of the first side lug 11, the second side lug 12 and the movable strip 7 is smaller than the length of the limiting hole 10, and the limiting hole 10 is used for the movable strip 7 and the first side, The structure formed by the combination of the second side ears 12 plays a role in limiting.

Wherein, the shape of the bottom terminal surface of nut 3 is regular hexagon, and the edge of nut 3 is provided with third diamond coating 22, and the specification size of nut 3 is the same with the specification size of bolt head 1, and the design of third diamond coating 22 has the high characteristics of hardness, for nut 3 provides the protection, reduces the wearing and tearing that produce when using the spanner operation.

Wherein, the outer wall fixedly connected with input pipeline 25 of nut 3, screwed joint 26 in the one end fixed mounting of input pipeline 25, the middle part fixedly connected with connecting pipe 28 of container 30, the middle part of connecting pipe 28 is provided with solenoid valve 29, the one end fixed mounting of connecting pipe 28 has outer screwed joint 27, interior screwed joint 26 and outer screwed joint 27 threaded connection, the inside of container 30 is filled with lubricating oil, when unfavorable phenomena such as slight corrosion appear between nut 3 and the cylinder 2, control solenoid valve 29 is opened, make the inside passageway of connecting pipe 28 unblocked, the inside lubricating oil of container 30 gets into in nut 3's the structure through connecting pipe 28 and input pipeline 25.

Wherein, the inside of nut 3 has offered annular channel 23, the inside of annular channel 23 and the inside intercommunication of input pipeline 25, offered overflow channel 24 between annular channel 23 and the screw hole 21, the quantity of overflow channel 24 is four groups, control solenoid valve 29 opens, make the inside passageway of connecting pipe 28 unblocked, the inside lubricating oil of container 30 gets into annular channel 23 through connecting pipe 28 and input pipeline 25, in the clearance between nut 3 and cylinder 2 is arrived through overflow channel 24, lubricate the rust part, in order to dismantle.

Wherein, end cover 31 is detachably installed on the top of container 30, the inside of container 30 slides and is provided with piston 34, the top fixed mounting of piston 34 has connecting rod 33, the top of end cover 31 is provided with push head 32, the perforation has been seted up at the middle part of end cover 31, the bottom fixed connection of perforation and push head 32 is passed on the top of connecting rod 33, manual control push head 32 presses, promote connecting rod 33 and piston 34, can exert pressure to lubricating oil, make lubricating oil can be even and quick infiltration nut 3 in the clearance between cylinder 2.

Wherein, be provided with the screw between container 30 and the end cover 31, the detachable connection in bottom of screw and end cover 31 is passed through at container 30's top, dismouting easy operation, dismantle the change to the subassembly when doing benefit to production assembly and trouble, the fixed cover in middle part of piston 34 is equipped with sealing washer 36, the design of sealing washer 36, can improve the sealed effect between piston 34 and the container 30, prevent that lubricating oil when the pressure-bearing, in the piston 34 edge pouring over piston 34, the top cementing of push-and-pull head 32 is fixed with second anti-skidding pad body 35, anti-skidding effect when improving the hand operation.

The working principle and the using process of the invention are as follows: the workpiece to be connected is positioned between the bolt head 1 and the nut 3, the cylinder 2 is inserted into a preformed hole formed in the workpiece to be connected, one end of the cylinder 2, provided with the external thread 4, protrudes towards the nut 3, the operation can be carried out by using a common wrench or an Allen wrench, when the operation is carried out by using the common wrench, the bolt head 1 is clamped into a clamping opening on the common wrench, when the operation is carried out by using the Allen wrench, the end part of the Allen wrench is inserted into the groove 19 to rotate the bolt head 1, so that the nut 3 is in threaded connection with the protruding part of the cylinder 2, after the nut 3 is locked, the nut is matched with the bolt head 1 to clamp the workpiece to be connected, thereby completing the assembly of the workpiece, when the nut 3 is locked, the first rubber gasket 5 and the second rubber gasket 6 are clamped to deform due to extrusion, meanwhile, a reaction force is generated by, the fastening effect is improved, one side of each of the first rubber gasket 5 and the second rubber gasket 6, which is close to the workpiece, is respectively provided with a first anti-slip groove 16 and a second anti-slip groove 17, so that the friction force between the first rubber gasket 5 and the workpiece is increased, the rotation resistance of the nut 3 or the bolt head 1 can be improved, and the bolt head 1 has a certain anti-loosening effect, furthermore, the first rubber gasket 5 and the second rubber gasket 6 have excellent flexibility, so that the vibration energy can be weakened, and the adverse effect of vibration on a fastening piece can be reduced, in addition, in the locking structure, the movable strip 7 is positioned in a reserved hole formed in the workpiece, when entering the reserved hole, the spiral spring 15 is stressed to contract, meanwhile, the compression rebound characteristic is utilized to generate a reaction force, the fastening effect is further improved, and the bolt head 1, the nut 3 and the cylinder 2 can weaken the vibration energy by matching with the first rubber, during the dismantlement, use ordinary spanner or allen spanner to operate bolt head 1 equally, nut 3 and cylinder 2 after the separation, can accomplish the dismantlement, when bad phenomena such as slight corrosion appear between nut 3 and the cylinder 2, interior adapter 26 assembles with outer adapter 27, make input pipeline 25 and connecting pipe 28 butt joint, control solenoid 29 is opened, make the inside passageway of connecting pipe 28 unblocked, the inside lubricating oil of container 30 gets into annular channel 23 through connecting pipe 28 and input pipeline 25, in the clearance between nut 3 and the cylinder 2 is reachd through overflow channel 24, the part is lubricated in the corrosion, so that dismantle, in addition, connecting rod 33, push-and-pull head 32 and piston 34 cooperate, can exert pressure to lubricating oil, make lubricating oil can be even and quick infiltration nut 3 in the clearance between cylinder 2.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a special bolt of petrochemical industry, includes bolt head (1), cylinder (2) and nut (3), its characterized in that: bolt head (1) and cylinder (2) formula structure as an organic whole, nut (3) set up in the below of bolt head (1), external screw thread (4) have been seted up on cylinder (2) from the outer wall in up half region down, threaded hole (21) have been seted up at the middle part of nut (3), screw hole (21) and external screw thread (4) screw-thread fit, contain container (30) in the structure of nut (3).

2. The petrochemical industry special bolt according to claim 1, wherein: the bottom of bolt head (1) is spliced and is fixed with first rubber packing ring (5), first antiskid groove (16) have been seted up to the bottom of first rubber packing ring (5), the top of nut (3) is spliced and is fixed with second rubber packing ring (6), second antiskid groove (17) have been seted up at the top of second rubber packing ring (6), first antiskid groove (16) are the annular with the outline of second antiskid groove (17).

3. The petrochemical industry special bolt according to claim 1, wherein: the shape of the top end face of the bolt head (1) is a regular hexagon, a first diamond coating (18) is arranged at the edge of the bolt head (1), a groove (19) is formed in the top of the bolt head (1), the groove (19) is arranged in the middle, the groove (19) is a regular hexagon, and a second diamond coating (20) is arranged on the inner wall of the groove (19).

4. The petrochemical industry special bolt according to claim 1, wherein: the mounting groove (9) is formed in the half area of the cylinder (2) from top to bottom, the limiting hole (10) is formed in the outer wall of the half area of the cylinder (2) from top to bottom, and the inside of the limiting hole (10) is communicated with the inside of the mounting groove (9).

5. The petrochemical industry special bolt according to claim 4, wherein: the inside of mounting groove (9) is provided with activity strip (7), the local part of activity strip (7) passes spacing hole (10) and bulges to the outside of cylinder (2), the both ends of the bulge of activity strip (7) are the inclined plane, the bulge fixed mounting of activity strip (7) has first anti-skidding pad body (8).

6. The petrochemical industry special bolt according to claim 4, wherein: fixed mounting has first spring fixing base (13) on the cell wall of mounting groove (9), the one side fixed mounting that activity strip (7) are located mounting groove (9) inside has second spring fixing base (14), fixedly connected with coil spring (15) between first spring fixing base (13) and second spring fixing base (14), fixed mounting has first side ear (11) and second side ear (12) on activity strip (7), the length sum of first side ear (11), second side ear (12) and activity strip (7) is less than the length in spacing hole (10).

7. The petrochemical industry special bolt according to claim 1, wherein: the shape of the bottom end face of the nut (3) is a regular hexagon, a third diamond coating (22) is arranged at the edge of the nut (3), and the specification size of the nut (3) is the same as that of the bolt head (1).

8. The petrochemical industry special bolt according to claim 1, wherein: outer wall fixedly connected with input pipeline (25) of nut (3), the one end fixed mounting of input pipeline (25) has interior tooth to connect (26), the middle part fixedly connected with connecting pipe (28) of container (30), the middle part of connecting pipe (28) is provided with solenoid valve (29), the one end fixed mounting of connecting pipe (28) has outer tooth to connect (27), interior tooth connects (26) and outer tooth connects (27) threaded connection, the inside of container (30) is filled with lubricating oil.

9. The petrochemical industry special bolt according to claim 8, wherein: an annular channel (23) is formed in the nut (3), the interior of the annular channel (23) is communicated with the interior of the input pipeline (25), overflow channels (24) are formed between the annular channel (23) and the threaded hole (21), and the number of the overflow channels (24) is four.

10. The petrochemical industry special bolt according to claim 8, wherein: end cover (31) are detachably installed on the top of container (30), the inside of container (30) slides and is provided with piston (34), the top fixed mounting of piston (34) has connecting rod (33), the top of end cover (31) is provided with pushes away pull head (32), the perforation has been seted up at the middle part of end cover (31), the top of connecting rod (33) is passed the perforation and is pushed away the bottom fixed connection of pull head (32).

11. The petrochemical industry special bolt according to claim 10, wherein: be provided with the screw between container (30) and end cover (31), the top of container (30) is through the detachable connection in bottom of screw and end cover (31), the fixed cover in middle part of piston (34) is equipped with sealing washer (36), the top cementing of push away pull head (32) is fixed with second anti-skidding pad body (35).