A non-powered air-locking and slag-discharging device for a vertical mill

Abstract

The utility model discloses a non-powered air-locking slag discharge device for a vertical mill, comprising a slag discharge valve body and a slag discharge valve cover; the inlet of the slag discharge valve body is connected to the slag discharge port at the bottom of the vertical mill annular shell, the slag discharge valve cover is rotatably connected to the outlet of the slag discharge valve body through a support ear, and a sealing plate is arranged on the surface of the slag discharge valve cover in contact with the outlet of the slag discharge valve body; the outlet of the slag discharge valve body points obliquely downward. The utility model is provided with a slag discharge valve body and a slag discharge valve cover, when the slag accumulated in the slag discharge valve body reaches a certain amount, the slag discharge valve cover will be instantly opened to discharge the slag, and the slag discharge valve cover will quickly cover the outlet of the slag discharge valve cover under the action of the wind in the vertical mill annular shell, so that the reciprocating cycle can realize both air locking and slag discharge, which meets the internal wind pressure requirements of the vertical mill during normal production and the need to discharge the slag from the outside of the vertical mill annular shell.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mills, in particular to a vertical mill unpowered air-locking slag-discharging device. Background Art

[0002] Vertical mill is an ideal large-scale grinding equipment, widely used in cement, electric power, metallurgy, chemical industry, non-metallic minerals and other industries. It integrates crushing, drying, grinding, grading and conveying, has high production efficiency, and can grind block, granular and powdered raw materials into required powdered materials.

[0003] The vertical mill includes an annular shell (also known as the grinding body), a grinding disc and a powder classifier. The annular shell of the vertical mill is arranged on the outside of the grinding disc. Under the action of wind, some of the heavier materials scattered on the grinding disc fall into the grinding disc under the action of gravity, and some of the materials that are difficult to grind pass over the retaining ring on the grinding disc and fall into the annular gap between the annular shell of the vertical mill and the grinding disc, that is, fall into the annular shell of the vertical mill. Most of them pass through the annular shell of the vertical mill upward with the wind and enter the powder classifier for screening. Qualified fine powder passes through the air outlet of the powder classifier to become a finished product (a powder classifier is arranged on the annular shell of the vertical mill, and the air outlet of the powder classifier is connected to the fan. There is wind in the vertical mill and in the annular shell of the vertical mill).

[0004] The materials that are difficult to grind fall into the annular shell of the vertical mill and need to be discharged from the outside of the annular shell of the vertical mill. However, when the vertical mill is in normal production, there are requirements for the internal wind pressure of the vertical mill. Therefore, it is necessary to design a slag discharge device that can lock the wind, which can meet the internal wind pressure requirements of the vertical mill during normal production and meet the need to discharge the materials that are difficult to grind from the outside of the annular shell of the vertical mill. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a non-powered air-locking slag discharge device for a vertical mill in view of the deficiencies in the above-mentioned prior art. The non-powered air-locking slag discharge device for a vertical mill is provided with a slag discharge valve body and a slag discharge valve cover. When the slag accumulated in the slag discharge valve body (i.e., the material that is more difficult to grind) reaches a certain amount, the slag discharge valve cover will instantly open to discharge the slag. Under the action of the wind in the annular shell of the vertical mill, the slag discharge valve cover will quickly cover the outlet of the slag discharge valve cover, and the reciprocating cycle will work in this way, thereby achieving both air locking and slag discharge, meeting the internal wind pressure requirements of the vertical mill during normal production, and also meeting the need to discharge the slag from the outside of the annular shell of the vertical mill.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0007] A vertical mill non-powered air-locking slag discharge device comprises a slag discharge valve body and a slag discharge valve cover;

[0008] The slag discharge valve body comprises a vertical valve body section and an inclined valve body section, the bottom end of the vertical valve body section is fixedly connected to the top end of the inclined valve body section to form a V-shaped integrated structure, the top end of the vertical valve body section is the inlet of the slag discharge valve body, and the bottom end of the inclined valve body section is the outlet of the slag discharge valve body;

[0009] The inlet of the slag discharge valve body is connected to the slag discharge port at the bottom of the annular shell of the vertical mill, the slag discharge valve cover is rotatably connected to the outlet of the slag discharge valve body through the lug, and a sealing plate is provided on the surface of the slag discharge valve cover contacting with the outlet of the slag discharge valve body; the outlet of the slag discharge valve body points obliquely downward;

[0010] The slag discharge valve cover is used to open the outlet of the slag discharge valve body under the gravity of the slag accumulated in the slag discharge valve body to discharge the slag; the slag discharge valve cover is also used to cover the outlet of the slag discharge valve body under the action of the wind in the annular shell of the vertical mill.

[0011] As a further improved technical solution of the utility model, the vertical valve body section and the inclined valve body section are both cylindrical structures with openings at both ends.

[0012] As a further improved technical solution of the utility model, the inlet of the slag discharge valve body is provided with an upper flange, and the upper flange is fixedly connected to the slag discharge port of the vertical mill annular shell by flange bolts.

[0013] As a further improved technical solution of the utility model, the outlet of the slag discharge valve body is provided with a lower flange, and a sealing plate is provided on the surface of the slag discharge valve cover in contact with the lower flange of the slag discharge valve body outlet.

[0014] As a further improved technical solution of the utility model, the support ears are V-shaped, and there are two of them, which are respectively welded on the slag discharge valve cover. The other end of the support ears is provided with a connecting hole. The bolt hole on the slag discharge valve body is connected to the connecting hole of the support ear by bolts, and the bolt can rotate in the connecting hole of the support ear, thereby realizing the rotational connection between the slag discharge valve cover and the outlet of the slag discharge valve body.

[0015] As a further improved technical solution of the utility model, a plurality of handles are provided on the slag discharge valve cover.

[0016] As a further improved technical solution of the utility model, the sealing plate is a rubber plate.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a slag discharge valve body and a slag discharge valve cover at the slag discharge port at the bottom of the annular shell of the vertical mill. When the slag accumulated in the slag discharge valve body (i.e., the material which is more difficult to grind) reaches a certain amount, the slag discharge valve cover will be instantly opened under the gravity of a certain amount of slag to discharge the slag. Since there is negative pressure wind in the annular shell of the vertical mill, the slag discharge valve cover will quickly cover the outlet of the slag discharge valve cover under the action of the wind in the annular shell of the vertical mill, and the reciprocating cycle can be worked in this way, so as to realize both air locking and slag discharge, thereby meeting the wind pressure requirement inside the annular shell of the vertical mill during normal production of the vertical mill and also meeting the need to discharge the slag from the outside of the annular shell of the vertical mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall cross-sectional view of the utility model.

[0020] Figure 2 It is a cross-sectional view of the slag discharge valve body of the utility model.

[0021] Figure 3 It is the front view of the slag discharge valve cover of the utility model.

[0022] Figure 4 It is a top view of the slag discharge valve cover of the utility model.

[0023] Figure 5 It is a side view of the support ear of the utility model. DETAILED DESCRIPTION

[0024] The specific implementation of the utility model is further described below according to the accompanying drawings:

[0025] like Figure 1 As shown, a vertical mill non-powered air-locking slag discharge device comprises a slag discharge valve body 3 and a slag discharge valve cover 2. Figure 1 1 indicates the flow direction of wind, 4 indicates the flow direction of slag discharge, 8 indicates the grinding disc, and 5 indicates the vertical mill reducer. The vertical mill reducer 5 is connected to the grinding disc 8. The vertical mill reducer 5 converts the high-speed rotation of the motor into the appropriate speed of the grinding disc 8 through the reduction effect. The grinding disc 8 is located inside the annular housing 7 of the vertical mill.

[0026] The inlet of the slag discharge valve body 3 is connected to the slag discharge port 6 at the bottom of the vertical mill annular shell 7, and the slag discharge valve cover 2 is rotatably connected to the outlet of the slag discharge valve body 3 through the support ear 201. The surface of the slag discharge valve cover 2 in contact with the slag discharge valve body 3 is provided with a sealing plate 202; the outlet of the slag discharge valve body 3 points obliquely downward.

[0027] The slag discharge valve cover 2 is used to open the outlet of the slag discharge valve body 3 under the gravity of the slag accumulated in the slag discharge valve body 3 to discharge the slag; the slag discharge valve cover 2 is also used to cover the outlet of the slag discharge valve body 3 under the action of the wind in the vertical mill annular shell 7.

[0028] In this embodiment, Figure 2 As shown, the slag discharge valve body 3 includes a vertical valve body section 301 and an inclined valve body section 302, the bottom end of the vertical valve body section 301 is fixedly connected to the top end of the inclined valve body section 302 to form a V-shaped integrated structure, the top end of the vertical valve body section 301 is the inlet of the slag discharge valve body 3, and the bottom end of the inclined valve body section 302 is the outlet of the slag discharge valve body 3.

[0029] In this embodiment, the vertical valve body section 301 and the inclined valve body section 302 are both cylindrical structures with openings at both ends.

[0030] In this embodiment, an upper flange 303 is provided at the inlet of the slag discharge valve body 3, and the upper flange 303 is fixedly connected to the lower flange at the slag discharge port 6 of the vertical mill annular shell 7 by flange bolts.

[0031] In this embodiment, the outlet of the slag discharge valve body 3 is provided with a lower flange 304, and the surface of the slag discharge valve cover 2 contacting the lower flange 304 of the outlet of the slag discharge valve body 3 is provided with a sealing plate 202. The sealing plate 202 realizes the sealing contact between the slag discharge valve cover 2 and the slag discharge valve body 3.

[0032] In this embodiment, Figure 3-5 As shown, the lug 201 is V-shaped, and there are two of them, which are welded on the slag discharge valve cover 2 respectively. The other end of the lug 201 is provided with a connecting hole, and the bolt hole on the slag discharge valve body 3 is connected to the connecting hole of the lug 201 by bolts, and the bolt can rotate in the connecting hole of the lug 201, thereby realizing the rotational connection between the slag discharge valve cover 2 and the outlet of the slag discharge valve body 3.

[0033] In this embodiment, Figure 3-4 As shown, a plurality of handles 203 are provided on the slag discharge valve cover 2 .

[0034] In this embodiment, the sealing plate 202 is made of a rubber plate. The lower flange 304 of the slag discharge valve body 3 is made of a steel plate. Under the action of the negative pressure wind inside the vertical mill annular shell 7, the rubber plate contacts the steel plate to achieve sealing.

[0035] The present embodiment is a slag discharge device which has no power and can lock air, and can meet the needs of normal production of the vertical mill and slag discharge. A circular cylinder, namely, a slag discharge valve body 3, is added to the lower part of the slag discharge port 6 of the annular shell 7 of the vertical mill, and is connected to the slag discharge port 6 of the annular shell 7 of the vertical mill by flange bolts. A slag discharge valve cover 2 is provided at the lower flange 304 of the slag discharge valve body 3. The inner surface of the slag discharge valve cover 2 is a rubber plate, and the contact surface between the slag discharge valve cover 2 and the lower flange 304 of the slag discharge valve body 3 is a rubber plate. The rubber plate and the steel plate (the lower flange 304 of the slag discharge valve body 3 is a steel plate) have good sealing performance. The support ear 201 on the slag discharge valve cover 2 is connected to the slag discharge valve body 3 by bolts, and the bolts can rotate freely in the connecting hole of the support ear 201. The slag in the annular shell 7 of the vertical mill enters the slag discharge valve body 3 through the slag discharge port 6. When the slag accumulated in the slag discharge valve body 3 reaches a certain amount, the slag discharge valve cover 2 will be instantly opened under the gravity of a certain amount of slag to discharge the slag (realize slag discharge). Under the action of the negative pressure wind in the mill, the slag discharge valve cover 2 will quickly cover the outlet lower flange 304 of the slag discharge valve body 3 (realize air lock), and work in a reciprocating cycle. The wind pressure requirements of the vertical mill annular shell during normal production of the vertical mill are met, and the need to discharge the slag from the outside of the annular shell of the vertical mill is also met.

[0036] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A vertical mill non-powered air-locking slag removal device, characterized in that: It comprises a slag discharge valve body (3) and a slag discharge valve cover (2); The slag discharge valve body (3) comprises a vertical valve body section (301) and an inclined valve body section (302); the bottom end of the vertical valve body section (301) is fixedly connected to the top end of the inclined valve body section (302) to form a V-shaped integrated structure; the top end of the vertical valve body section (301) is the inlet of the slag discharge valve body (3), and the bottom end of the inclined valve body section (302) is the outlet of the slag discharge valve body (3); The inlet of the slag discharge valve body (3) is connected to the slag discharge port (6) at the bottom of the vertical mill annular shell (7); the slag discharge valve cover (2) is rotatably connected to the outlet of the slag discharge valve body (3) through a lug (201); a sealing plate (202) is provided on the surface of the slag discharge valve cover (2) in contact with the outlet of the slag discharge valve body (3); and the outlet of the slag discharge valve body (3) points obliquely downward; The slag discharge valve cover (2) is used to open the outlet of the slag discharge valve body (3) under the action of gravity of the slag accumulated in the slag discharge valve body (3) to discharge the slag; the slag discharge valve cover (2) is also used to cover the outlet of the slag discharge valve body (3) under the action of wind in the vertical mill annular shell (7).

2. The vertical mill non-powered air-locking slag removal device according to claim 1 is characterized in that: The vertical valve body section (301) and the inclined valve body section (302) are both cylindrical structures with openings at both ends.

3. The vertical mill non-powered air-locking slag removal device according to claim 1 is characterized in that: The inlet of the slag discharge valve body (3) is provided with an upper flange (303), and the upper flange (303) is fixedly connected to the slag discharge port (6) of the vertical mill annular shell (7) by flange bolts.

4. The vertical mill non-powered air-locking slag removal device according to claim 1 is characterized in that: The outlet of the slag discharge valve body (3) is provided with a lower flange (304), and the surface of the slag discharge valve cover (2) in contact with the lower flange (304) of the outlet of the slag discharge valve body (3) is provided with a sealing plate (202).

5. The vertical mill non-powered air-locking slag removal device according to claim 1 is characterized in that: The support lugs (201) are V-shaped, and there are two of them, which are respectively welded to the slag discharge valve cover (2). The other end of the support lug (201) is provided with a connection hole. The bolt hole on the slag discharge valve body (3) is connected to the connection hole of the support lug (201) by bolts, and the bolts can rotate in the connection holes of the support lugs (201), thereby realizing the rotational connection between the slag discharge valve cover (2) and the outlet of the slag discharge valve body (3).

6. The vertical mill non-powered air-locking slag removal device according to claim 1 is characterized in that: The slag discharge valve cover (2) is provided with a plurality of handles (203).

7. The vertical mill non-powered air-locking slag removal device according to claim 1 is characterized in that: The sealing plate (202) is a rubber plate.

Images