CN219385335U - Improved generation steel for building engineering rust cleaning device - Google Patents

Abstract

The utility model discloses an improved rust removing device for steel for constructional engineering, which comprises: a sprayer; the hose is connected to the outer wall of one side of the lower part of the sprayer and is communicated with the inner cavity of the sprayer; one end of the rust removing spray pipe is communicated with the connecting hose, and the other end of the rust removing spray pipe is communicated with the nozzle; the shower nozzle, the shower nozzle includes: the spray head body is of a ring-shaped structure with a hollow inside; the spray nozzles are in a plurality, extend outwards in a ring shape, are arranged on the outer wall of the spray head body and are communicated with the inside of the spray head body; and the installation joint is used for being connected with the rust removing spray pipe. The utility model can conveniently and rapidly spray the rust remover to the rust-removing steel bar, realize that a plurality of nozzles arranged on the spray head extend into the installed template, lighten the engineering quantity of the template removed on site, improve the rust removing efficiency, and through repeated experimental practice on the construction site, the rust removing speed can be accelerated, the rust removing efficiency is improved and the labor cost is saved by lengthening or shortening the rust removing spray pipe on site.

Description

Improved generation steel for building engineering rust cleaning device

Technical Field

The utility model relates to a rust removing device, in particular to an improved steel rust removing device for constructional engineering, which is mainly used for removing rust from steel in constructional engineering and belongs to the technical field of auxiliary building construction products.

Background

Generally, along with the development of economy and society, the construction industry also rapidly develops, and especially the construction period required from the field installation of the building to the construction at present is long, or part of construction sites can not be normally constructed due to the influence of weather and the like, steel in the construction sites is stored in a long way along with the time and exposed, the steel can be oxidized and rusted to different degrees, the steel is required to be derusted according to the related national standard requirements before being used, the conventionally adopted derusting method for the bound steel is chemical derusting, namely acid in pickling solution is utilized to perform chemical reaction with metal oxide, so that the metal oxide is dissolved and converted into ferric chloride or ferric sulfate, and then a large amount of clean water is used for cleaning, thereby achieving the purpose of derusting. Because the construction amount is large, the manual smearing speed is low, materials are wasted, the safety is low, rust removal is incomplete, and therefore the rust prevention efficiency is very low.

At present, although workers use the existing knapsack sprayer at the construction site to spray the chemical rust remover onto the surface of the rust-removing steel bar for rust removal, the defects and defects of the knapsack sprayer in the use process are that the traditional knapsack sprayer nozzle is only one, only one surface can be sprayed, a plurality of surfaces can be sprayed only by rotating for many times on site, 360-degree omnibearing spraying cannot be performed, the rust-preventing efficiency is very low, and the traditional knapsack sprayer is labor-consuming and time-consuming, the spraying effect is not guaranteed to achieve the expected effect, and in a word, the use is very inconvenient.

Therefore, it is necessary to develop an improved rust removing device for construction engineering steel with simple structure and strong practicability, which is a key point for solving the technical problems.

Disclosure of Invention

Aiming at the defects and shortcomings existing in the background technology, the utility model improves and innovates the defects, and aims to provide a rust remover which is simple in structure, novel and reasonable in design, convenient and rapid to spray the rust remover to rust steel bars, a plurality of nozzles arranged on a spray head extend into an installed template, the field template removing engineering amount is reduced, the rust removing efficiency is improved, the rust removing spray pipe is lengthened or shortened on site through repeated experimental practice on a construction field, the rust removing speed is increased, the rust removing efficiency is improved, and the labor cost is saved.

The utility model further aims to save manpower and material resources required by detaching the template, improve the rust removing efficiency, save the cost, furthest reduce the labor intensity of operators and improve the construction efficiency; more importantly, the contact between a person and a chemical rust remover can be reduced, occupational diseases are reduced, and the safety of constructors is ensured.

In order to solve the problems and achieve the above object, the present utility model provides an improved rust removing device for steel for construction engineering, which is realized by adopting the following design structure and the following technical scheme:

the utility model relates to an improvement of a rust removing device for improved steel for construction engineering, which comprises the following steps:

a sprayer (1);

the hose (2) is connected to the outer wall of one side of the lower part of the sprayer (1) and is communicated with the inner cavity of the sprayer (1);

one end of the rust removing spray pipe (3) is communicated with the connecting hose (2), and the other end is communicated with the connecting spray head (4);

a nozzle (4), the nozzle (4) comprising:

the spray head comprises a spray head body (41), wherein the spray head body (41) is of an annular structure with a hollow inside;

the spray nozzles (42) are multiple, and the spray nozzles (42) are arranged on the outer wall of the spray head body (41) in an annular outward extending mode and communicated with the inside of the spray head body (41);

and the mounting joint (43) is used for being detachably connected with the rust removing spray pipe (3).

As the improvement of the utility model, the rust removing device also comprises an extension spray pipe (5), wherein one end of the extension spray pipe (5) is detachably connected with the hose (2), and the other end of the extension spray pipe is detachably connected with the rust removing spray pipe (3).

As a further improvement of the utility model, the lengthened spray pipe (5) is a tubular body with a hollow inside, an external thread section (51) is annularly arranged on the outer wall of one end part of the tubular body, and the external thread section is used for being in threaded connection with an internally threaded sleeve at the free end of the handheld pipe (21);

a mounting structure (52) is extended from the other end of the tubular body, and the mounting structure (52) is a sleeve with an internal thread section.

As a further improvement of the utility model, the sprayer (1) is a knapsack manual sprayer or a knapsack electric sprayer.

As a further improvement of the utility model, the sprayer (1) is a knapsack electric sprayer.

As a further improvement of the utility model, the hose (2) is a rubber hose made of elastic material, the free end of the rubber hose is also connected with a handheld pipe (21) in an extending and communicating way, and a control button (211) for controlling the rust removing liquid in the sprayer (1) to flow out or stopping flowing out is arranged on the handheld pipe (21).

As a still further improvement of the utility model, the rust removing spray pipe (3) is a tubular body, a locking section (31) is annularly arranged on the outer wall of one end part of the tubular body, the locking section (31) is an external thread section, and the external thread section is used for being in threaded connection with a mounting structure (52) of the lengthening spray pipe (5);

a sleeve (32) having an internally threaded section is provided at the other end of the tubular body.

As a still further improvement of the utility model, the shape and structure of the rust removing spray pipe (3) is the same as or different from the shape and structure of the lengthening spray pipe (5).

As a still further improvement of the utility model, the rust removing spray pipe (3) and the lengthening spray pipe (5) are fixed pipes or extensible pipes.

As a still further improvement of the utility model, the nozzle (42) is a single-hole atomizing nozzle or a double-hole atomizing nozzle or a multi-hole atomizing nozzle;

the mounting joint (43) is a pipe body, the fixed end of the pipe body is communicated with the spray head body (41) to form an integrated structure, the outer wall of the free end of the pipe body is annularly provided with an external thread section, and the external thread section is in threaded connection with the sleeve (32).

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model has simple structure, novel and reasonable design, convenient operation and use and low price, adopts movable threaded connection between the hose and the rust removing spray pipe as well as between the hose and the lengthening spray pipe, can select the extending length according to the needs in the rust removing process, and increases or shortens the use length requirement of the whole rust removing device; the use is convenient, the carrying and the operation are convenient;

2. the rust removing spray pipe with the stainless steel structure is not easy to deform, and the spray head at the end part can be accurately stretched into the part needing to spray the rust remover, so that the accuracy is high and the working efficiency is high;

3. the rust removing spray pipe can extend into the reinforced template, the template is not required to be removed, and a plurality of spray nozzles arranged on the spray head can spray in a plurality of directions at the same time, so that steel can be subjected to rust removal, manpower and material resources required by the template removal are saved, the rust removing efficiency is improved, the cost is saved, the labor intensity of operators is reduced to the greatest extent, and the construction efficiency is also improved;

4. the utility model reduces the contact between the person and the chemical rust remover, reduces occupational diseases, and ensures the safety of constructors;

5. the utility model can be repeatedly used, is energy-saving and environment-friendly, is convenient and quick to assemble, disassemble, maintain and replace, saves cost and simultaneously provides reliable guarantee for building construction;

6. the utility model achieves the purposes of conveniently and quickly spraying the rust remover to the rust-removing steel bar, realizing the effect that a plurality of nozzles arranged on the spray head extend into the installed template, reducing the engineering quantity of the template removed on site, improving the rust removing efficiency, and realizing lengthening or shortening the rust removing spray pipe by using the lengthened spray pipe on site through repeated experimental practice on the construction site, thereby accelerating the rust removing speed, improving the rust removing efficiency and saving the labor cost.

Drawings

The utility model is described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic view of the use of the present utility model;

FIG. 2 is a schematic view of the overall structure of the present utility model;

FIG. 3 is a schematic diagram of the overall structure of the connection relation between the rust removing spray pipe (3) and the spray head (4) components;

FIG. 4 is a schematic diagram of the overall structure of the connection relationship between the rust removing spray pipe (3) and the components of the lengthening spray pipe (5) and the hose (2);

FIG. 5 is a schematic diagram of the overall structure of the connection relation between the rust removing spray pipe (3) and the lengthened spray pipe (5) components of the utility model;

FIG. 6 is a schematic view of the overall structure of the components of the rust removing nozzle (3) of the present utility model;

FIG. 7 is a schematic view showing the overall structure of the components of the shower head (4) of the present utility model;

wherein, the reference numerals in the figures: 1-a sprayer;

2-hose, 21-hand-held tube, 211-control button;

3-rust removing spray pipe, 31-locking section, 32-sleeve;

4-spray head, 41-spray head body, 42-spray nozzle, 43-installation joint;

5-lengthening spray pipe, 51-external thread section, 52-mounting structure;

6, an operator;

7-installed templates;

8-rusted steel bar.

Detailed Description

In order to make the technical means, the inventive features, the achieved objects and the effects of the present utility model easy to understand, the technical solution of the present utility model will be described in further detail below with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments and the features in the embodiments in the present application may be combined without conflict. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The rust cleaning device of steel for improved generation building engineering as the description attached drawing shows includes:

a sprayer 1;

a hose 2, wherein the hose 2 is connected to the outer wall of one side of the lower part of the sprayer 1 and is communicated with the inner cavity of the sprayer 1;

the rust removing spray pipe 3, one end of the rust removing spray pipe 3 is communicated with the connecting hose 2, and the other end is communicated with the connecting spray head 4;

the head 4, the head 4 includes:

the spray head comprises a spray head body 41, wherein the spray head body 41 is of an annular structure with a hollow inside;

the plurality of nozzles 42, the plurality of nozzles 42 are annularly and outwardly arranged on the outer wall of the nozzle body 41 and communicated with the inside of the nozzle body 41;

and the mounting joint 43, wherein the mounting joint 43 is used for being detachably connected with the rust removing spray pipe 3.

Further, as shown in fig. 4 and 5 of the specification, the rust removing device further comprises an elongated spray pipe 5, one end of the elongated spray pipe 5 is detachably connected with the hose 2, and the other end of the elongated spray pipe 5 is detachably connected with the rust removing spray pipe 3.

Specifically, as shown in fig. 4 of the specification, the elongated nozzle 5 is a hollow tubular body, and an external thread section 51 is annularly arranged on the outer wall of one end of the tubular body, and is used for being in threaded connection with an internally threaded sleeve at the free end of the handheld pipe 21;

a mounting structure 52 is extended from the other end of the tubular body, and the mounting structure 52 is a sleeve having an internal thread section.

Further, as shown in fig. 1 of the specification, the sprayer 1 is a knapsack type manual sprayer or a knapsack type electric sprayer.

Specifically, the sprayer 1 is a backpack electric sprayer.

Further, as shown in fig. 1, the hose 2 is a rubber hose made of elastic material, a hand-held tube 21 is further connected to the free end of the rubber hose in an extending and communicating manner, and a control button 211 for controlling the flow of the rust removing liquid in the sprayer 1 or stopping the flow is mounted on the hand-held tube 21.

Further, as shown in fig. 3 and 6, the rust removing spray pipe 3 is a tubular body, a locking section 31 is annularly arranged on the outer wall of one end part of the tubular body, the locking section 31 is an external thread section, and the external thread section is used for being in threaded connection with a mounting structure 52 of the lengthening spray pipe 5;

a sleeve 32 having an internally threaded section extends at the other end of the tubular body.

Further, the shape and structure of the rust removing spray pipe 3 is the same as or different from that of the lengthened spray pipe 5.

Specifically, the rust removing spray pipe 3 and the lengthened spray pipe 5 are fixed pipes or extensible pipes.

Further, as shown in fig. 7, the nozzle 42 is a single-hole atomizing nozzle or a double-hole atomizing nozzle or a multi-hole atomizing nozzle;

the mounting joint 43 is a pipe body, the fixed end of the pipe body is communicated with the spray head body 41 to form an integrated structure, the outer wall of the free end of the pipe body is annularly provided with an external thread section, and the external thread section is in threaded connection with the sleeve 32.

In the utility model, the outer surfaces of the sprayer 1, the hose 2, the rust removing spray pipe 3, the spray head 4 and the lengthening spray pipe 5 are respectively provided with an injection molding layer, a rust preventing layer, a waterproof layer and a warning layer in sequence from inside to outside, and fluorescent powder is coated on the warning layer.

In the utility model, a high molecular wear-resistant material is injected on the injection layer; the rust-proof layer comprises an epoxy zinc-rich primer and a chlorinated rubber finish paint and an epoxy cloud iron intermediate paint positioned between the epoxy zinc-rich primer and the chlorinated rubber finish paint; the waterproof layer is polyurethane waterproof paint; the warning layer is a reflective warning tape or a reflective color film or reflective paint which are mixed with each other in single color or multiple colors.

Meanwhile, in the utility model, the connection is fixed connection or movable connection or detachable connection, wherein the fixed connection is welded connection or directly processed into an integrated structure; the movable connection or the detachable connection or the split structure is hinged connection, internal and external threaded connection, bayonet connection, plug socket connection or bolt assembly connection or screw connection.

Therefore, the rust-proof layer and the waterproof layer are coated on the outer parts of all the component parts of the utility model, so that the rust can be prevented, the service life of the whole device is prolonged, the environment is protected, the resources are saved, meanwhile, the self-luminous fluorescent material is coated on the outer part of the device, the position of the device can be clearly marked at night or in a darkroom and under-ground construction environment, the safety prompt effect can be effectively played, the conspicuity degree is improved, the people can easily distinguish, and the safety in construction and life is increased.

In summary, more specific embodiments of the present utility model are:

example 1

The rust removing device for the improved steel for the constructional engineering with the design structure needs to be manually or correspondingly carried to a designated position for use by carrying the rust removing device which is manufactured before the rust removing device is used.

Before use, the operator 6 fills the sprayer 1 of the utility model with the rust remover liquid prepared in advance, and the sprayer can be used after being filled.

When the rust remover is used, an operator 6 can carry the rust remover by lifting the rust remover through the double shoulder straps arranged on the sprayer 1, when the operator 6 holds the hand-held pipe 21 arranged at one position of the end part of the hose 2, stretches the rust removing spray pipe 3 into the position of the rusted steel bar 8 on the periphery of the installed template 7, aligns the spray head 4 arranged at the end part of the rust removing spray pipe 3 with the rusted steel bar 8 needing to be rust removed, then the operator 6 opens the rust remover through the control button 211 arranged on the hand-held pipe 21, then the rust remover liquid in the sprayer 1 reaches the spray head 4 along the hose 2 through the rust removing spray pipe 3, finally, the rust remover liquid is sprayed onto the rusted steel bar 8 around the installed template 7 uniformly and comprehensively through the spray nozzles 42 arranged around the spray head 4 by 360 degrees, and simultaneously, in the rust removing process, the spray pipe 3 is selectively moved up and down according to the actual situation, so that the spray head 4 can stretch into the position of the rusted steel bar 8 needing rust removing, and the rust removing work is performed on the rusted steel bar 8.

Finally, after the operator 6 completes the rust removal of all the rusted steel bars 8 over time, the operator 6 only needs to close a rust removal device of the utility model through a control button 211 arranged on the handheld pipe 21, stop the supply of the rust remover liquid, then put down the sprayer 1, clean and repair all the components of the utility model, and then transport the utility model to a designated tool storage position for storage for the next circulation turnover.

Example 2{ an extension nozzle 5 was added to the example 1 }

Embodiment 2 is substantially the same as embodiment 1, except that an elongated nozzle 5 is further provided, one end of the elongated nozzle 5 is detachably connected to the hose 2, and the other end is detachably connected to the rust removing nozzle 3.

Specifically, the elongated nozzle 5 is a hollow tubular body, and an external thread section 51 is annularly arranged on the outer wall of one end part of the tubular body, and is used for being in threaded connection with an internally threaded sleeve at the free end of the handheld pipe 21;

a mounting structure 52 is extended from the other end of the tubular body, and the mounting structure 52 is a sleeve having an internal thread section.

Before the improved rust removing device for the steel for the constructional engineering with the design structure is used, the rust removing device which is manufactured is required to be carried to a designated position for use by manpower or corresponding carrying equipment.

Before use, the operator 6 fills the sprayer 1 of the utility model with the rust remover liquid prepared in advance, and the sprayer can be used after being filled.

When the rust removing device is used, an operator 6 can carry out rust removing by lifting the rust removing device through the double shoulder belt arranged on the sprayer 1, when the rust removing device is used, the operator 6 only needs to hold the hand-held pipe 21 arranged at one position of the end part of the hose 2, stretches the rust removing spray pipe 3 with the lengthened spray pipe 5 to the position of the rust removing steel bar 8 on the periphery of the installed template 7, aligns the spray heads 4 arranged at the end part of the rust removing spray pipe 3 with the rust removing steel bar 8 needing to be removed, then the operator 6 opens the rust removing device through the control button 211 arranged on the hand-held pipe 21, then the rust remover liquid in the sprayer 1 reaches the spray heads 4 through the rust removing spray pipe 3 along the hose 2, finally, the rust removing spray pipe 42 arranged at the periphery of the spray heads 4 is sprayed on the rust removing steel bar 8 comprehensively and uniformly at 360 degrees, and simultaneously, in the rust removing process, the spray heads 4 of the rust removing spray pipe 3 are selectively moved up and down according to the actual situation, so that the rust removing work can be performed on the rust removing steel bar 8 needing to be stretched to the rust removing steel bar 8.

Finally, after the operator 6 completes the rust removal of all the rusted steel bars 8 over time, the operator 6 only needs to close a rust removal device of the utility model through a control button 211 arranged on the handheld pipe 21, stop the supply of the rust remover liquid, then put down the sprayer 1, clean and repair all the components of the utility model, and then transport the utility model to a designated tool storage position for storage for the next circulation turnover.

In the implementation operation of the above embodiment 2, the extension nozzle 5 may be selectively detachably screwed into a plurality of pipes according to the actual construction process.

Therefore, as operators realize lengthening the rust removing spray pipe 3 by using the lengthened spray pipe 5 on site according to the requirements of actual construction conditions, the rust removing requirements of building steels with different heights are met, thereby further achieving the purposes of accelerating the rust removing speed, improving the rust removing efficiency and saving the labor cost.

Finally, after the operator 6 completes the rust removal of all the rusted steel bars 8 over time, the operator 6 only needs to close a rust removal device of the utility model through a control button 211 arranged on the handheld pipe 21, stop the supply of the rust remover liquid, then put down the sprayer 1, clean and repair all the components of the utility model, and then transport the utility model to a designated tool storage position for storage for the next circulation turnover.

In the embodiment 1 and the embodiment 2, the sprayer 1 is selected, and the electric sprayer or the flashlight sprayer can be selected firstly, so that the backpack electric sprayer is mainly used in the existing construction site, and one worker can operate the backpack electric sprayer; in the embodiment, the sprayer 1 adopts a knapsack electric sprayer and is mainly used for containing rust remover;

the hose 2 is a rubber tube, and the rubber tube belongs to a hose, and the hose rotation direction can be used on site; meanwhile, the hose is connected from the back-carried electric sprayer 1, and can be bent and twisted, and the hose rotation direction can be used on site;

the rust removing spray pipe 3 is a stainless steel spray pipe, the stainless steel spray pipe cannot bend, and can accurately extend into a region needing rust removal, so that the accuracy is high, and the working efficiency is high;

the spray head 4 can spray in 360-degree all-around and multi-azimuth, the spray nozzle is aligned to the part needing to spray the rust remover, and the spraying effect is ensured; the rust remover liquid passes through the rust removing spray pipe 3, flows through the 360-degree multi-directional nozzle 42 in the hollow cavity of the spray head body 41, and is sprayed onto steel to be derusted.

The lengthening spray pipe 5 is made of stainless steel pipes, the stainless steel is hard, the stainless steel is not bent, the position of the spray nozzle is convenient to accurately control, the lengthening of the lengthening spray pipe 5 is mainly connected through threads, the lengthening purpose is achieved, and when the lengthening is needed to be shortened, the lengthening spray pipe 5 is rotationally disconnected by adopting the same method.

Finally, it should be noted that the foregoing describes in detail the improved rust removing device for steel for construction engineering provided by the present utility model, and the principles of the present utility model are described herein, and the description of the foregoing working principles is only for aiding in understanding the core idea of the present utility model. It should be noted that it will be apparent to those skilled in the art that the present utility model may be modified and adapted without departing from the principles of the present utility model, and such modifications and adaptations are intended to be within the scope of the appended claims.

Claims (10)

1. Improved generation building engineering is with rust cleaning device of steel, its characterized in that includes:

a sprayer (1);

the hose (2) is connected to the outer wall of one side of the lower part of the sprayer (1) and is communicated with the inner cavity of the sprayer (1);

one end of the rust removing spray pipe (3) is communicated with the connecting hose (2), and the other end is communicated with the connecting spray head (4);

a nozzle (4), the nozzle (4) comprising:

the spray head comprises a spray head body (41), wherein the spray head body (41) is of an annular structure with a hollow inside;

the spray nozzles (42) are multiple, and the spray nozzles (42) are arranged on the outer wall of the spray head body (41) in an annular outward extending mode and communicated with the inside of the spray head body (41);

and the mounting joint (43) is used for being detachably connected with the rust removing spray pipe (3).

2. The improved rust removing device for steel for construction engineering according to claim 1, further comprising an elongated spray pipe (5), wherein one end of the elongated spray pipe (5) is detachably connected with the hose (2), and the other end of the elongated spray pipe is detachably connected with the rust removing spray pipe (3).

3. An improved rust removing device for constructional engineering steel according to claim 2, characterized in that the elongated nozzle (5) is a tubular body with a hollow interior, an external thread section (51) is annularly arranged on the outer wall of one end of the tubular body, and the external thread section is used for being in threaded connection with an internally threaded sleeve at the free end of the hand-held pipe (21);

a mounting structure (52) is extended from the other end of the tubular body, and the mounting structure (52) is a sleeve with an internal thread section.

4. The improved rust removing device for steel for construction engineering according to claim 1, wherein the sprayer (1) is a knapsack manual sprayer or a knapsack electric sprayer.

5. The improved rust removing device for steel for construction engineering according to claim 4, wherein the sprayer (1) is a knapsack electric sprayer.

6. An improved rust removing device for steel for construction engineering according to claim 1, wherein the hose (2) is a rubber hose made of elastic material, the free end of the rubber hose is further connected with a hand-held pipe (21) in an extending and communicating manner, and a control button (211) for controlling the rust removing liquid in the sprayer (1) to flow out or stopping to flow out is arranged on the hand-held pipe (21).

7. The improved rust removing device for steel for construction engineering according to claim 1, wherein the rust removing spray pipe (3) is a tubular body, a locking section (31) is annularly arranged on the outer wall of one end part of the tubular body, the locking section (31) is an external thread section, and the external thread section is used for being in threaded connection with a mounting structure (52) of the lengthened spray pipe (5);

a sleeve (32) having an internally threaded section is provided at the other end of the tubular body.

8. The improved rust removing device for steel for construction engineering according to claim 7, wherein the shape and structure of the rust removing spray pipe (3) are the same as or different from the shape and structure of the lengthening spray pipe (5).

9. The improved rust removing device for steel for construction engineering according to claim 8, wherein the rust removing spray pipe (3) and the lengthened spray pipe (5) are fixed pipes or extendable pipes.

10. An improved rust removing device for construction steel according to claim 1, wherein the nozzle (42) is a single-hole atomizing nozzle or a double-hole atomizing nozzle or a multi-hole atomizing nozzle;

the mounting joint (43) is a pipe body, the fixed end of the pipe body is communicated with the spray head body (41) to form an integrated structure, the outer wall of the free end of the pipe body is annularly provided with an external thread section, and the external thread section is in threaded connection with the sleeve (32).