CN216039319U

CN216039319U - Coal injection pipe prefabricated part and coal injection pipe head structure for cement kiln

Info

Publication number: CN216039319U
Application number: CN202122451311.8U
Authority: CN
Inventors: 王立旺; 朱国平; 李新明; 王琪; 彭晶晶; 方利华
Original assignee: Zhejiang Kingcred New Material Co ltd
Current assignee: Zhejiang Kingcred New Material Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-03-15
Anticipated expiration: 2031-10-12

Abstract

The utility model belongs to the technical field of cement production accessories, and particularly discloses a coal injection pipe prefabricated part for a cement kiln and a coal injection pipe head structure, wherein the coal injection pipe prefabricated part is used for splicing into a circular pipe sleeved at the head of the coal injection pipe and comprises a prefabricated main body in an arc pipe shell shape, and the prefabricated main body comprises an inner arc surface, an outer arc surface and two joint end surfaces connecting the inner arc surface and the outer arc surface; a groove for installing an anchoring part is formed in the inner arc surface of the prefabricated main body in a penetrating mode along the axial direction, and the anchoring part penetrates into the groove in the axial direction; the width of the groove is smaller than the maximum width of the anchoring piece, so that the anchoring piece cannot be separated radially after being placed in the groove. The prefabricated member can form the port protective sleeve of the coal injection pipe by assembling, thereby obviously reducing the construction difficulty and improving the construction speed; and the prefabricated part is not easy to crack, and the service life of the protective sleeve is long.

Description

Coal injection pipe prefabricated part and coal injection pipe head structure for cement kiln

Technical Field

The utility model belongs to the technical field of cement production accessories, and particularly relates to a coal injection pipe prefabricated part for a cement kiln and a coal injection pipe head structure.

Background

The cement is required to be calcined at high temperature in the production process, high-temperature fuel is required to be conveyed into the cement kiln through the coal injection pipe, a port of the coal injection pipe can be generally cast with a layer of refractory material as a protective sleeve, and the coal injection pipe is in high temperature for a long time, is subjected to severe environments such as cement clinker scouring, abrasion, rapid cooling and rapid heating, has very high performance requirements on the protective sleeve, and requires the protective sleeve to have good construction quality. When the port of the coal injection pipe is poured with refractory materials, the requirements on construction conditions are high: the formwork support is needed during pouring, the mixed material needs to be put into a mold within 30 minutes, otherwise, the mixed material becomes hard, the mixed material needs to be vibrated during the mold putting, and the construction time is long; a maintenance period of about 3d is needed after construction, and the maintenance time is long; the construction difficulty is high by adopting the castable in winter, and necessary heat preservation measures are needed during construction due to low air temperature, so that the construction difficulty is increased, and the construction speed is influenced; even if the construction technical requirements are strictly executed, the local burst phenomenon always occurs after the operation is carried out for a period of time, and the maintenance cost is higher; under the condition of unscheduled maintenance, the kiln is opened for ignition usually for several hours or half a day during actual maintenance, so that the service life of the castable is greatly shortened. Therefore, the construction difficulty of the conventional protective sleeve is high, and the construction quality is difficult to ensure.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a coal injection pipe prefabricated part for a cement kiln, which can form a coal injection pipe port protective sleeve by splicing, thereby obviously reducing the construction difficulty and improving the construction speed; and the prefabricated part is not easy to crack, and the service life of the protective sleeve is long.

In order to achieve the purpose, the utility model adopts the following specific technical scheme:

a coal injection pipe prefabricated part for a cement kiln is used for splicing into a round pipe sleeved at the head of a coal injection pipe, and comprises a prefabricated main body in an arc pipe shell shape, wherein the prefabricated main body comprises an inner arc surface, an outer arc surface and two joint end surfaces connecting the inner arc surface and the outer arc surface; a groove for installing an anchoring part is formed in the inner arc surface of the prefabricated main body in a penetrating mode along the axial direction, and the anchoring part penetrates into the groove in the axial direction; the width of the groove is smaller than the maximum width of the anchoring piece, so that the anchoring piece cannot be separated radially after being placed in the groove.

Unlike the prior art that the protective sleeve is formed by casting, the prefabricated part capable of forming the circular tube (namely the protective sleeve) by mutual splicing is arranged, the traditional casting construction mode is changed, the steps of on-site stirring, casting, ramming, maintenance and the like are directly omitted, the construction difficulty is obviously reduced, the construction time is saved, the installation of the prefabricated part of the coal injection tube is not influenced by the construction environment and seasons, the construction quality is ensured, and the service life of the coal injection tube can be effectively prolonged. The groove is arranged on the prefabricated main body and used for accommodating the anchoring piece with the top end fixedly connected to the core body of the coal injection pipe, so that the coal injection pipe is connected with the prefabricated part; and the setting of recess can effectively release stress, reduces the deformation fracture of prefab under temperature variation or external force impact, has improved its life, ensures its effective protection to coal-injection pipe.

Preferably, the anchoring piece is a V-shaped or Y-shaped anchoring piece and is provided with two clamping feet; the groove is in an inverted T shape and comprises a radial section and an internal expanding section arranged at the bottom end of the radial section, and a bayonet is formed at the intersection of the radial section and the internal expanding section; when the anchoring piece is accommodated in the groove, the bottom ends of the clamping pins abut against the bottom wall of the inner expanding section, and the bayonets limit and fix the two clamping pins. The structure can avoid the position deviation of the prefabricated member during and after installation, and the stability of the structure is improved.

Preferably, the inner expanding section is arc-shaped, so that the stress release effect is better; and with intrados and extrados parallel arrangement to make prefabricated main part keep the uniformity at the thickness that the recess encloses the position, reduce the intensity difference.

Preferably, the prefabricated body is a semicircular shell.

Preferably, the groove is formed in the middle of the prefabricated main body, so that the whole prefabricated part is designed symmetrically, and the structural stability is improved.

Preferably, the outer arc surface is further coated with a glaze layer. The prefabricated main body is made of corundum refractory material, and the surface of the prefabricated main body is coated with glaze so as to improve the K resistance of the coal injection pipe in the using process₂O、Na₂And (4) the corrosion capability of alkaline gases such as O and the like.

Preferably, the thickness of the glaze layer is 0.3-0.5 mm.

The utility model also provides a coal injection pipe head structure which comprises a coal injection pipe core body, a round pipe sleeved on the coal injection pipe core body and an anchoring part for connecting the coal injection pipe core body and the round pipe; the circular tube is formed by splicing at least two coal injection tube prefabricated parts for the cement kiln; the anchoring piece is clamped in the groove, and the top end of the anchoring piece is fixedly connected with the coal injection pipe core body. When the prefabricated member is installed, the anchoring members are fixedly installed on the outer wall of the coal injection pipe core body in advance, each prefabricated member is correspondingly provided with one group of anchoring members, and the group of anchoring members are distributed on the outer wall of the coal injection pipe core body at intervals along the axial direction.

Preferably, adjacent preforms are spliced by adhesion between the faying end faces.

Preferably, the top end of the anchoring piece is connected with the coal injection pipe core body in a welding mode.

The utility model has the following beneficial effects:

1. according to the prefabricated member, the arc-shaped tube shell-shaped prefabricated main body with the anchoring piece mounting groove is arranged to realize splicing molding of the circular tube (namely the protective sleeve) sleeved on the head of the coal injection tube, and meanwhile, the coal injection tube is connected with the prefabricated member, so that the construction difficulty is obviously reduced, the construction speed is improved, and the construction quality is ensured; the pipe that the prefab spliced becomes can effectively protect coal injection pipe and prolong its life.

2. According to the utility model, the groove arranged on the prefabricated main body has the function of stress release besides the installation of the anchoring part, so that the deformation and cracking under the temperature change or external force impact are effectively reduced, and the service life of the prefabricated part is prolonged; in addition, the groove is arranged to be of an inverted T-shaped structure to limit and fix the anchoring piece, and the installation stability is improved.

3. According to the coal injection pipe head structure, after the coal injection pipe head structure is used for a period of time, when a circular pipe is partially destroyed, the whole body does not need to be replaced like the existing casting-molded protective sleeve, and only the prefabricated part corresponding to the damaged part needs to be replaced, so that the waste of materials is reduced, and the disassembly and the assembly are more convenient.

Drawings

FIG. 1: the structure of the coal injection pipe prefabricated part for the cement kiln is shown in the embodiment 1 of the utility model.

FIG. 2: the structure of the head structure of the coal injection pipe in embodiment 1 of the utility model is schematically illustrated.

FIG. 3: the structural schematic diagram of the coal injection pipe core body in embodiment 1 of the utility model.

FIG. 4: the structure of the head structure of the coal injection pipe in embodiment 2 of the utility model is schematically illustrated.

In the figure: 1-prefabricating a main body, 2-glaze layer, 3-anchoring piece, 4-coal injection pipe core body and 5-circular pipe; 11-inner arc surface, 12-outer arc surface, 13-joint end surface, 14-groove; 141-radial section, 142-internal expanding section and 143-bayonet.

Detailed Description

The utility model is further described below with reference to the accompanying drawings and specific embodiments.

Example 1

A coal injection pipe prefabricated part for a cement kiln comprises a semi-circular pipe shell-shaped prefabricated main body 1 as shown in figure 1, wherein the prefabricated main body 1 comprises an inner arc surface 11, an outer arc surface 12 and two joint end surfaces 13 connecting the inner arc surface 11 and the outer arc surface 12; a groove 14 for installing an anchoring part 3 is formed in the inner arc surface 11 of the prefabricated main body 1 in a penetrating mode along the axial direction, the groove 14 is of an inverted T shape and is formed in the middle of the prefabricated main body 1, the anchoring part 3 is a Y-shaped anchoring part, and the anchoring part 3 penetrates into the groove 14 in the axial direction; the anchor 3 has two catches 31; the groove 14 comprises a radial section 141 and an inner expanding section 32 arranged at the bottom end of the radial section 31, and a bayonet 143 is formed at the intersection of the radial section 141 and the inner expanding section 142; the inner expanding section 142 is arc-shaped and is arranged in parallel with the inner arc surface 11 and the outer arc surface 12; when the anchoring member 3 is accommodated in the groove 14, the bottom ends of the clamping legs 31 abut against the bottom wall of the inner expanding section 142, and the bayonet 143 limits and fixes the two clamping legs 31; the prefabricated body 1 is further coated with a glaze layer 2 with a thickness of 0.4mm on the extrados surface 12.

The embodiment further provides a coal injection pipe head structure, as shown in fig. 2, including a coal injection pipe core body 4, a circular pipe 5 sleeved on the coal injection pipe core body 4, and an anchoring member 3 connecting the coal injection pipe core body 4 and the circular pipe 5; the circular tube 5 is formed by splicing two coal injection tube prefabricated parts for the cement kiln, and the adjacent prefabricated parts are spliced by bonding the joint end surfaces 13; the anchoring pieces 3 are clamped in the grooves 14, the top ends of the anchoring pieces are welded with the coal injection pipe core body 4, a group of anchoring pieces 3 are correspondingly installed on each prefabricated part, and the group of anchoring pieces 3 are distributed on the outer wall of the coal injection pipe core body 4 at intervals along the axial direction (as shown in fig. 3).

Example 2

A coal injection pipe head structure, as shown in fig. 4, the basic structure is the same as that of example 1, and the only difference is that: the anchor 3 is a V-shaped anchor.

This detailed description is to be construed as illustrative only and is not to be taken as limiting the utility model, as any changes that may be made by a person skilled in the art after reading the present specification will be protected by the patent laws within the scope of the appended claims.

Claims

1. The utility model provides a coal injection pipe prefab for cement kiln which characterized in that: the prefabricated part comprises a prefabricated main body (1) in an arc tube shell shape, wherein the prefabricated main body (1) comprises an inner arc surface (11), an outer arc surface (12) and two joint end surfaces (13) connecting the inner arc surface (11) and the outer arc surface (12); a groove (14) for installing the anchoring piece (3) penetrates through the inner arc surface (11) of the prefabricated main body (1) along the axial direction, and the anchoring piece (3) penetrates into the groove (14) in the axial direction; the width of the groove (14) is smaller than the maximum width of the anchoring piece (3), so that the anchoring piece (3) cannot be radially separated after being placed in the groove (14).

2. The coal injection pipe prefabricated member for the cement kiln as claimed in claim 1, wherein: the anchoring piece (3) is a V-shaped or Y-shaped anchoring piece and is provided with two clamping feet (31); the groove (14) is in an inverted T shape and comprises a radial section (141) and an inner expanding section (142) arranged at the bottom end of the radial section (141), and a bayonet (143) is formed at the intersection of the radial section (141) and the inner expanding section (142); when the anchoring piece (3) is accommodated in the groove (14), the bottom ends of the clamping feet (31) abut against the bottom wall of the inner expanding section (142), and the bayonets (143) limit and fix the two clamping feet (31).

3. The coal injection pipe prefabricated member for the cement kiln as claimed in claim 2, wherein: the inner expanding section (142) is arc-shaped and is parallel to the inner arc surface (11) and the outer arc surface (12).

4. The coal injection pipe prefabricated member for the cement kiln as claimed in claim 1, wherein: the prefabricated main body (1) is a semicircular shell.

5. The coal injection pipe prefabricated member for the cement kiln as claimed in claim 1, wherein: the groove (14) is formed in the middle of the prefabricated main body (1).

6. The coal injection pipe prefabricated member for the cement kiln as claimed in claim 1, wherein: the outer arc surface (12) is also coated with a glaze layer (2).

7. The coal injection pipe prefabricated member for the cement kiln as claimed in claim 6, wherein: the thickness of the glaze layer (2) is 0.3-0.5 mm.

8. The utility model provides a coal injection pipe head structure which characterized in that: comprises a coal injection pipe core body (4), a round pipe (5) sleeved on the coal injection pipe core body (4) and an anchoring part (3) for connecting the coal injection pipe core body (4) and the round pipe (5); the round pipe (5) is formed by splicing at least two coal injection pipe prefabricated parts for the cement kiln according to any one of claims 1 to 7; the anchoring piece (3) is clamped in the groove (14) and the top end of the anchoring piece is fixedly connected with the coal injection pipe core body (4).

9. The coal injection pipe head structure according to claim 8, wherein: the adjacent preforms are spliced by adhesion between the joint end faces (13).

10. The coal injection pipe head structure according to claim 8, wherein: the top end of the anchoring piece (3) is connected with the coal injection pipe core body (4) in a welding mode.