Feed pipe structure with internal flushing function

Abstract

The feeding pipe structure is characterized by comprising a feeding pipe body, an inner flushing pipe and an outer flushing pipe, wherein the inner flushing pipe penetrates through the feeding pipe body and a material pushing plate, one end of the inner flushing pipe is fixed on the feeding pipe body, one end of the outer flushing pipe is connected with the inner flushing pipe, and the other end of the outer flushing pipe penetrates through and is fixed on a front cover plate of a centrifugal machine; the inner flushing pipe is further provided with a baffle and annular water outlet holes formed in the baffle. One end of the inner flushing pipe penetrates through the material pushing plate, and the other end of the inner flushing pipe is connected with the outer flushing pipe, so that flushing water passes through the outer flushing pipe and the inner flushing pipe and is uniformly sprayed into a space formed by the material pushing plate and the first-stage rotary drum along the annular water outlet holes in the baffle plate, and residual, accumulated and hardened materials at the space are flushed; therefore, material residues, accumulation and hardening in a space formed by the material pushing plate and the first-stage rotary drum after operation of the centrifugal machine are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pusher centrifuges, in particular to a feed pipe structure with internal flushing. Background Art

[0002] In the existing pusher centrifuge, in the space structure formed by the pusher plate and the first-stage drum, part of the mother liquor mixed with a small amount of fine particles will inevitably move to the space formed by the pusher plate and the first-stage drum along the gap between the pusher sheet installed on the pusher plate and the first-stage drum screen when the pusher plate reciprocates. Generally, most of the materials in this space will be discharged through the drain port on the drum ring under the centrifugal force generated by the operation, but some materials will slowly accumulate in this area after long-term operation, which is more obvious in the separation of high-viscosity and easy-to-accumulate materials. In addition, the structure of the existing pusher centrifuge needs to ensure that the feed is evenly distributed in the separation area, so conventional flushing water cannot be flushed to the above-mentioned area where materials are easy to clump through the pusher plate; in addition, although the centrifuge is equipped with corresponding flushing points outside this area, because the flushing of the pusher centrifuge is generally operated in a rotating state, its external flushing water cannot pass through the drainage holes of the external drum ring to reach the above-mentioned area where materials are easy to clump. If the material in this area is not effectively flushed for a long time, the material will accumulate in this area or be compacted on the drum, which will cause the drum balance failure and aggravate the vibration; the accumulated material will squeeze the push plate, causing the push plate to deform or the stud to break; the above problems will eventually increase the maintenance rate of the centrifuge, increase the maintenance cost, and reduce the service life. Therefore, a feed pipe structure with internal flushing is proposed. Summary of the invention

[0003] The utility model aims to solve the above problems and proposes a feeding pipe structure with internal flushing.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a feed pipe structure with internal flushing, which is characterized by including a feed pipe body, an internal flushing pipe that passes through the feed pipe body and the push plate and is fixed on the feed pipe body at one end, and an external flushing pipe that is connected to the internal flushing pipe at one end and passes through and is fixed on the front cover plate of the centrifuge at the other end; the internal flushing pipe is also equipped with a baffle and an annular water outlet hole arranged on the baffle.

[0005] Preferably, the inner flushing pipe is also provided with a retaining ring with a conical structure which can disperse the suspension evenly and prevent the suspension from flowing into the central hole of the push plate.

[0006] Preferably, the minimum distance between the small end conical surface of the retaining ring and the pushing plate is greater than or equal to 4 mm.

[0007] Preferably, nuts are installed on the external flushing pipe and are located on both sides of the front cover plate and fix the external flushing pipe.

[0008] Preferably, a washer is installed between the nut and the front cover plate.

[0009] Preferably, the external flushing pipe is also provided with an external thread connected to an external water pipe.

[0010] The beneficial effects of the utility model are as follows: one end of the inner flushing pipe passes through the push plate, and the other end is connected to the outer flushing pipe, so that flushing water passes through the outer flushing pipe and the inner flushing pipe and is evenly sprayed along the annular water outlet hole on the baffle plate to the space formed by the push plate and the first-stage drum, so as to flush the residual, accumulated and compacted materials there, thereby preventing the residual, accumulated and compacted materials in the space formed by the push plate and the first-stage drum after the centrifuge is operated. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a partial enlarged view of point A of the present utility model.

[0013] Figure 3 It is a partial enlarged view of B of the utility model.

[0014] Figure 4 It is a partial enlarged view of C of the utility model.

[0015] Legend: 1. Feed pipe body; 2. Internal flushing pipe; 201. Baffle; 202. Annular water outlet; 3. External flushing pipe; 301. External thread; 4. Baffle ring; 5. Nut; 6. Washer; 7. Push plate; 8. Front cover. DETAILED DESCRIPTION

[0016] Next, we will further explain the feed pipe structure with internal flushing described in the present invention in conjunction with the accompanying drawings.

[0017] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Participate in the Figure 1-4 As shown, in this embodiment, a feed pipe structure with internal flushing is characterized in that it includes a feed pipe body 1, an internal flushing pipe 2 that passes through the feed pipe body 1 and the push plate 7 and is fixed to the feed pipe body 1 at one end by welding, and an external flushing pipe 3 that is connected to the internal flushing pipe 2 at one end by a thread and passes through and is fixed on the front cover 8 of the centrifuge at the other end; the internal flushing pipe 2 is also equipped with a baffle 201 and an annular water outlet 202 arranged on the baffle 201; one end of the internal flushing pipe 2 passes through the push plate 7 and the other end is connected to the external flushing pipe 3, so that flushing water passes through the external flushing pipe 3 and the internal flushing pipe 2 and is evenly sprayed along the annular water outlet 202 on the baffle 201 into the space formed by the push plate 7 and the first-stage drum, and the residual, accumulated, and compacted materials there are flushed, thereby preventing the materials from remaining, accumulating, and compacting in the space formed by the push plate 7 and the first-stage drum after the centrifuge is operated.

[0020] Participate in the Figure 2 As shown, the inner flushing tube 2 is also equipped with a conical retaining ring 4 which can disperse the suspension evenly and prevent the suspension from flowing into the center hole of the push plate 7; the minimum distance between the small end cone surface of the retaining ring 4 and the push plate 7 is greater than or equal to 4mm; by arranging the conical retaining ring 4 on the inner flushing tube 2, the retaining ring 4 can disperse the suspension evenly and prevent the material from flowing into the center hole of the push plate 7 through the retaining ring 4, thereby preventing the material from running away; the minimum distance between the small end cone surface of the retaining ring 4 and the push plate 7 is greater than or equal to 4mm, thereby preventing the retaining ring 4 and the push plate 7 from scratching when the centrifuge is working.

[0021] Participate in the Figure 4 As shown, the external flushing pipe 3 is also equipped with nuts 5 which are respectively located on both sides of the front cover plate 8 and fixed to the external flushing pipe 3; washers 6 are installed between the nuts 5 and the front cover plate 8; the external flushing pipe 3 is also provided with an external thread 301 connected to the external water pipe; the nuts 5 on both sides of the front cover plate 8 are respectively rotated along the external flushing pipe 3 to make the washers 6 close to the nuts 5 and the front cover plate 8, and the external flushing pipe 3 is fixed on the front cover plate 8, thereby facilitating the fixation of the external flushing pipe 3; the external thread 301 on the external flushing pipe 3 can be connected to the external water pipe to supply water to the external flushing pipe 3, thereby facilitating the connection of the external water pipe.

[0022] During the use of the utility model, when feeding, water does not enter the inner flushing pipe 2 and the outer flushing pipe 3, and the feed pipe body 1 continuously sprays the suspension into the acceleration disk cavity, and the structure of the feed pipe body 1 is set to be conical, which can effectively prevent the suspension from entering the rear end of the push plate 7 to cause material leakage, and effectively disperse the suspension to evenly distribute the material and optimize the formation of the filter cake; when flushing, the feed pipe body 1 is closed, and the external water pipe supplies water to the external flushing pipe 3, and the flushing water flows to the inner flushing pipe 2 through the external flushing pipe 3 in turn, and then the flushing water is flushed into the cavity formed by the push plate 7 and the first-stage drum by the annular water outlet 202 arranged on the baffle 201 welded at the end of the inner flushing pipe 2, so as to flush the residual, accumulated and compacted materials, and the materials flushed away by the flushing water are discharged from the drainage holes of the drum circle under the high-speed continuous rotation of the centrifuge and are collected centrally by the liquid outlet.

[0023] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A feed pipe structure with internal flushing, characterized in that it comprises a feed pipe body (1), an internal flushing pipe (2) passing through the feed pipe body (1) and a push plate and having one end fixed to the feed pipe body (1), and an external flushing pipe (3) having one end connected to the internal flushing pipe (2) and the other end passing through and fixed to a front cover plate of a centrifuge; the internal flushing pipe (2) is also provided with a baffle (201) and an annular water outlet hole (202) arranged on the baffle (201).

2. A feeding pipe structure with internal flushing according to claim 1, characterized in that: The inner flushing pipe (2) is also provided with a conical-structured blocking ring (4) which can disperse the suspension evenly and block the suspension from flowing into the central hole of the push plate.

3. A feeding pipe structure with internal flushing according to claim 2, characterized in that: The minimum distance between the small end conical surface of the retaining ring (4) and the push plate is greater than or equal to 4 mm.

4. A feeding pipe structure with internal flushing according to claim 1, characterized in that: Nuts (5) are also installed on the external flushing pipe (3) and are located on both sides of the front cover plate and fix the external flushing pipe (3).

5. A feeding pipe structure with internal flushing according to claim 4, characterized in that: A washer (6) is installed between the nut (5) and the front cover plate.

6. A feeding pipe structure with internal flushing according to claim 1, characterized in that: The external flushing pipe (3) is also provided with an external thread (301) connected to an external water pipe.

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