Sealing device and sludge scraping device suitable for closed sludge tank

Abstract

The utility model belongs to the technical field of sealing devices, and particularly relates to a sealing device and a sludge scraping device suitable for a closed sludge tank. Comprising a sealing sleeve, and the sealing sleeve is fixedly installed on the side wall of the sludge tank and arranged outside a driving rod in a sleeving mode; the sealing element is mounted between the driving rod and the sealing sleeve, and the first end of the sealing element is propped against the side wall of the sludge tank; the pressing block is installed between the driving rod and the sealing sleeve, and one end of the pressing block abuts against the second end of the sealing piece; the sealing nut comprises a threaded connection part and a locking part perpendicular to the threaded connection part; the threaded connection part is arranged on the outer wall surface of the sealing sleeve in a sleeving manner and is in threaded connection with the sealing sleeve; the locking part abuts against the other end of the pressing block. The sealing device can effectively ensure that the sealing element is always in a compressed state, so that a gap between the driving rod and the sealing sleeve is better filled, the sealing effect is enhanced, and a medium in a sludge tank is prevented from leaking.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sealing device technical field, specifically is a kind of sealing device and mud scraping device suitable for closed sludge tank. BACKGROUND

[0002] In the field of radioactive waste liquid treatment, precipitation method is a common means to remove radioactive elements in waste liquid. A large amount of precipitates will be produced in this process, and most of these precipitates have high water content and need to be dewatered for subsequent storage and disposal. To better connect with the subsequent process, the precipitates can be temporarily stored in a horizontal closed sludge tank.

[0003] The mud scraping device, as an important component of the sludge tank, functions to scrape the sludge (precipitates) sent from the upper process through mechanical force from the flow guide area and transport them to the sludge hopper or sludge collection pit to reduce the deposition of sludge (precipitates) in the flow guide area. Generally, the mud scraping device is divided into a power part and an execution part. The power part is arranged outside the sludge tank, and the execution part performs the mud scraping operation inside the sludge tank. However, the conventional mud scraping device is directly connected with the execution part through a driving rod, and the sealing of this connection mode cannot be guaranteed, which is not suitable for use in a closed sludge tank containing radioactive waste.

[0004] Due to the potential harm of radioactive waste, the sealing of the sludge tank is extremely important. If the connection part of the mud scraping device is not sealed tightly, radioactive substances may leak, posing a serious threat to the environment and human health. Therefore, it is particularly important to develop a sealing device suitable for a closed sludge tank. This device should ensure the normal operation of the mud scraping device and the sealing of the sludge tank to prevent radioactive substances from leaking.

[0005] Based on this, the utility model provides a novel sealing device suitable for a closed sludge tank and a mud scraping device to overcome the above-mentioned defects. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a sealing device suitable for a closed sludge tank. When the sealing nut is tightened, the locking part will exert pressure on the pressing block, causing the pressing block to further compress the sealing element. This can effectively ensure that the sealing element is always in a compressed state, better filling the gap between the driving rod and the sealing sleeve, enhancing the sealing effect and preventing the medium in the sludge tank from leaking.

[0007] The utility model adopts the following technical solution: a sealing device suitable for a closed sludge tank is installed at the connection between the driving rod and the sludge tank. The sealing device comprises:

[0008] A sealing sleeve is fixedly installed at the side wall of the sludge tank and sleeved on the outer side of the driving rod;

[0009] A sealing member is installed between the driving rod and the sealing sleeve, and a first end of the sealing member abuts against the side wall of the sludge tank;

[0010] A pressing block is installed between the driving rod and the sealing sleeve, and one end of the pressing block abuts against a second end of the sealing member;

[0011] A sealing nut comprises a threaded connecting portion and a locking portion perpendicular to the threaded connecting portion; the threaded connecting portion is sleeved on the outer wall surface of the sealing sleeve and is threadedly connected with the sealing sleeve; and the locking portion abuts against the other end of the pressing block.

[0012] Further, the sealing device further comprises:

[0013] A fixing plate is sleeved on the outer side of the driving rod and is fixedly installed at the side wall of the sludge tank away from the sealing sleeve.

[0014] Further, the side of the fixing plate close to the side wall of the sludge tank is a plane, and the plane of the fixing plate is attached to the side wall of the sludge tank.

[0015] Further, the fixing plate is fixedly installed at the side wall of the sludge tank through three bolts uniformly distributed along the circumferential direction of the fixing plate.

[0016] Further, the side of the fixing plate away from the side wall of the sludge tank is formed with an annular flange.

[0017] Further, the annular flange away from the outer edge of the driving rod is provided with an inclined chamfer.

[0018] Further, the fixing plate is made of hard plastic or metal.

[0019] Further, the pressing block comprises a circular ring portion and a protruding portion arranged at one end of the circular ring portion away from the side wall of the sludge tank; the circular ring portion is arranged between the driving rod and the sealing sleeve, and one end of the circular ring portion away from the protruding portion abuts against the second end of the sealing member;

[0020] The outer wall surface of the side of the protruding portion close to the circular ring portion abuts against one end of the sealing sleeve away from the side wall of the sludge tank.

[0021] Further, the sealing member is made of rubber.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] The utility model discloses a sealing device suitable for closed sludge pool, adopts the thread connection part of sealing nut and the outer wall surface thread connection of sealing sleeve, and the position of sealing nut on sealing sleeve can be adjusted through rotating sealing nut.

[0024] Meanwhile, the locking part of sealing nut stops at the other end of pressure block, and together with sealing sleeve, pressure block and sealing element, forms a stable sealing structure, which can resist the influence of pressure change inside sludge pool, vibration during equipment operation and other factors on sealing effect, and ensure that the sealing device works stably for a long time in complex working environment.

[0025] In addition, the thread connection mode makes the installation and adjustment of sealing nut very convenient. During installation, the position of sealing nut can be accurately adjusted according to actual needs to achieve appropriate sealing pressure.

[0026] Another purpose of the utility model is to provide a sludge scraping device, which comprises the sealing device suitable for closed sludge pool. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed in the embodiment or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 The utility model discloses a sealing device structure schematic drawing suitable for closed sludge pool in specific embodiment of the utility model;

[0029] Figure 2 For Figure 1 The utility model discloses a sealing device structure schematic drawing suitable for closed sludge pool in specific embodiment of the utility model;

[0030] Wherein: drive rod 1;Sludge pool 2;Sealing sleeve 3;Sealing element 4, first end 40, second end 41;Pressure block 5, circular ring part 50, convex part 51;Sealing nut 6, thread connection part 60, locking part 61;Fixed plate 7, plane 70, bolt 71, annular flange 72, bevel chamfer 73. DETAILED DESCRIPTION

[0031] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the protection scope of the present application.

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the present application. Figure 1 The drawings in the present application Figure 2 The present application will be described in detail below with reference to the drawings and specific embodiments:

[0033] As Figures 1-2 shown, the present application is a sealing device suitable for a closed sludge tank, which is installed at the connection between a driving rod 1 and a sludge tank 2, and comprises a sealing sleeve 3, a sealing element 4, a pressing block 5 and a sealing nut 6.

[0034] The sealing sleeve 3 is fixedly installed at the side wall of the sludge tank 2 and is sleeved on the driving rod 1; the outer wall surface of the sealing sleeve 3 is provided with external threads; it should be noted that the fixed installation form of the sealing sleeve 3 is not limited, for example, it can be welded, bolted and connected, etc. In the present embodiment, the sealing sleeve 3 is welded and fixed at the side wall of the sludge tank 2, which has good welding and fixing stability.

[0035] The sealing element 4 is installed between the driving rod 1 and the sealing sleeve 3, and the first end 40 of the sealing element 4 abuts against the side wall of the sludge tank 2. In the present embodiment, the sealing element 4 is made of rubber material. The sealing element 4 made of rubber material can be compressed between the driving rod 1 and the sealing sleeve 3 to fill the small gap therebetween. Due to the elasticity of rubber, it can adapt to different assembly tolerances and deformations under working conditions, effectively preventing leakage of media such as sludge and sewage from between the driving rod 1 and the sealing sleeve 3, and ensuring the sealing effect. At the same time, in the environment of the sludge tank 2, there are various chemicals and microorganisms. The rubber material has certain corrosion resistance and can resist the erosion of acidic and alkaline substances and microorganisms in the sludge, prolonging the service life of the sealing element 4 and reducing the maintenance cost and workload caused by frequent replacement of the sealing element.

[0036] The pressing block 5 is installed between the driving rod 1 and the sealing sleeve 3, and one end of the pressing block 5 abuts against the second end 41 of the sealing element 4 to realize the compression of the sealing element 4.

[0037] The sealing nut 6 comprises a threaded connection part 60 and a locking part 61 perpendicular to the threaded connection part 60; the threaded connection part 60 is provided with internal threads and is sleeved on the outer wall surface of the sealing sleeve 3 and is in threaded connection with the sealing sleeve 3; the locking part 61 abuts against the other end of the pressing block 5.

[0038] The sealing device suitable for the closed sludge tank in the utility model, the threaded connection part 60 of the sealing nut 6 is screwed with the outer wall surface of the sealing sleeve 3, and the position of the sealing nut 6 on the sealing sleeve 3 can be adjusted by rotating the sealing nut 6. When the sealing nut 6 is tightened, the locking part 61 thereof will exert pressure on the pressing block 5, so that the pressing block 5 further presses the sealing element 4, the sealing element 4 can be effectively ensured to be always in a compressed state, so that the gap between the driving rod 1 and the sealing sleeve 3 can be better filled, the sealing effect is enhanced, and leakage of the medium in the sludge tank is prevented. Leakage into the sealing sleeve 3 can also be avoided, loss of the sealing element in the sealing sleeve 3 is avoided, and the service life of the sealing device is prolonged.

[0039] Meanwhile, the locking part 61 of the sealing nut 6 abuts against the other end of the pressing block 5, and together with the sealing sleeve 3, the pressing block 5 and the sealing element 4, a stable sealing structure is formed, which can resist the influence of factors such as pressure change inside the sludge tank 2 and vibration during equipment operation on the sealing effect, and ensure that the sealing device works stably for a long time in a complex working environment.

[0040] In addition, the threaded connection mode makes the installation and adjustment of the sealing nut 6 very convenient. During the installation process, the position of the sealing nut 6 can be accurately adjusted according to actual needs to achieve appropriate sealing pressure.

[0041] Further, in some specific embodiments, as shown in Figures 1-2 The sealing device further comprises a fixed plate 7.

[0042] The fixed plate 7 is sleeved outside the driving rod 1 and fixedly installed at the side wall of the sludge tank 2 away from the sealing sleeve 3. Meanwhile, the side of the fixed plate 7 close to the side wall of the sludge tank 2 is a plane 70, and the plane 70 of the fixed plate 7 is installed on the side wall of the sludge tank 2, effectively preventing leakage of sludge and the like from the connection between the driving rod 1 and the side wall of the sludge tank 2, further improving the sealing integrity of the entire sealing device and minimizing the risk of leakage.

[0043] In the embodiment, the fixed plate 7 is made of hard plastic or metal. The fixed plate 7 can be fixed in various ways, such as welding, buckle connection, bolt connection and the like. In the embodiment, the fixed plate 7 is fixedly installed at the side wall of the sludge tank 2 through three bolts 71 uniformly distributed along the circumferential direction. The bolt connection mode makes the installation process of the fixed plate 7 relatively simple, facilitates installation and disassembly, and meanwhile, the three bolts 71 uniformly distributed along the circumferential direction can make the fixation of the fixed plate 7 on the side wall of the sludge tank 2 more uniform and stable, effectively avoiding deformation or loosening of the fixed plate 7 due to uneven local stress, so that the fixed plate 7 can better fit the side wall of the sludge tank 2 and ensure the sealing effect.

[0044] Specifically, as shown in Figure 2 The annular flange 72 can increase the overall structural strength of the fixed plate 7, so that the fixed plate 7 can play a reinforcing role like a reinforcing rib when bearing pressure from the inside of the sludge tank 2 or external impact force, preventing the fixed plate 7 from deforming, thereby better maintaining the stability of the sealing device. At the same time, when there is a small amount of leakage or the sludge contacts the fixed plate 7, the annular flange 72 can play a certain guiding role to the sludge, reducing the risk of corrosion or damage to the drive rod 1 and the sealing device.

[0045] The annular flange 72 can increase the overall structural strength of the fixed plate 7, so that the fixed plate 7 can play a reinforcing role like a reinforcing rib when bearing pressure from the inside of the sludge tank 2 or external impact force, preventing the fixed plate 7 from deforming, thereby better maintaining the stability of the sealing device. At the same time, when there is a small amount of leakage or the sludge contacts the fixed plate 7, the annular flange 72 can play a certain guiding role to the sludge, reducing the risk of corrosion or damage to the drive rod 1 and the sealing device.

[0046] In addition, the bevel 73 can avoid the outer edge of the annular flange 72 being too sharp. During equipment installation, maintenance or daily operation, it prevents the operator from being scratched or damaged when colliding with the annular flange 72.

[0047] Further, the design of the pressure block 5 is refined in some specific embodiments, and the specific technical solutions are as follows:

[0048] The pressure block 5 includes a circular ring part 50 and a protruding part 51 arranged at one end of the circular ring part 50 away from the side wall of the sludge tank 2. The circular ring part 50 is arranged between the drive rod 1 and the sealing sleeve 3, and one end of the circular ring part 50 away from the protruding part 51 abuts against the second end 41 of the sealing element 4.

[0049] The outer wall surface of the protruding part 51 close to the circular ring part 50 abuts against one end of the sealing sleeve 3 away from the side wall of the sludge tank 2.

[0050] When the sealing nut 6 is tightened, the locking part 61 will exert pressure on the protruding part 51 in the pressure block 5, causing the circular ring part 50 in the pressure block 5 to further compress the sealing element 4, which can effectively ensure that the sealing element 4 is always in a compressed state, thereby better filling the gap between the drive rod 1 and the sealing sleeve 3, enhancing the sealing effect and preventing leakage of the medium in the sludge tank.

[0051] Meanwhile, due to the arrangement of the protruding part 51, when the locking part 61 of the sealing nut 6 applies pressure on the protruding part 51, the protruding part 51 can serve as a good pressure conducting structure, so that the pressure can be transmitted from the protruding part 51 to the annular part 50 in a more direct and concentrated manner, thereby ensuring that the annular part 50 can apply sufficient and effective pressure to the sealing element 4, so that the sealing element 4 can better play a sealing role. In addition, the outer wall surface of the protruding part 51 on the side close to the annular part 50 abuts against one end of the sealing sleeve 3 away from the side wall of the sludge pool 2, so that the abutting action of the protruding part 51 and the sealing sleeve 3 can prevent the displacement or tilting of the pressing block 5, thereby maintaining the stability of the entire sealing structure.

[0052] The utility model discloses on the basis of the above-mentioned sealing device suitable for closed sludge pool, further provide a kind of mud scraping device, it includes the sealing device suitable for above-mentioned closed sludge pool. The mud scraping device at least has all technical solutions of the above-mentioned sealing device suitable for closed sludge pool, at least has all advantages of the above-mentioned sealing device suitable for closed sludge pool, no longer repeat here.

[0053] The above is further described by specific embodiments, but it should be understood that the specific description here should not be understood as limiting the essence and scope of the utility model, and various modifications made by ordinary skilled in the art after reading the above embodiments are within the scope of the utility model.

Claims

1. A sealing device suitable for closed sludge tanks, installed at the connection between the drive rod and the sludge tank, characterized in that: The sealing device includes: A sealing sleeve is fixedly installed on the side wall of the sludge tank and sleeved over the drive rod; A sealing element is installed between the drive rod and the sealing sleeve, and the first end of the sealing element abuts against the side wall of the sludge tank. A pressure block is installed between the drive rod and the sealing sleeve, with one end of the pressure block abutting against the second end of the sealing element; A sealing nut, comprising a threaded connection portion and a locking portion perpendicular to the threaded connection portion; the threaded connection portion is sleeved on the outer wall surface of the sealing sleeve and threadedly connected to the sealing sleeve; the locking portion abuts against the other end of the pressure block.

2. The sealing device for closed sludge tanks according to claim 1, characterized in that: The sealing device further includes: A fixing plate is sleeved outside the drive rod and fixedly installed on the side wall of the sludge tank away from the sealing sleeve.

3. The sealing device for closed sludge tanks according to claim 2, characterized in that: The side of the fixing plate closest to the side wall of the sludge tank is flat, and the flat side of the fixing plate is fitted onto the side wall of the sludge tank.

4. The sealing device for closed sludge tanks according to claim 3, characterized in that: The fixing plate is fixedly installed on the side wall of the sludge tank by three bolts evenly distributed along its circumference.

5. The sealing device for closed sludge tanks according to claim 2, characterized in that: The fixing plate has an annular flange on the side of the side wall away from the sludge tank.

6. The sealing device for closed sludge tanks according to claim 5, characterized in that: The annular flange has a chamfered edge at its outer edge away from the drive rod.

7. The sealing device for closed sludge tanks according to claim 2, characterized in that: The fixing plate is made of rigid plastic or metal.

8. The sealing device for closed sludge tanks according to claim 1, characterized in that: The pressing block includes an annular portion and a protrusion disposed at one end of the annular portion away from the side wall of the sludge tank. The annular portion is disposed between the drive rod and the sealing sleeve, and the end of the annular portion away from the protrusion abuts against the second end of the sealing member. The outer wall surface of the protrusion near the annular portion abuts against the end of the sealing sleeve away from the side wall of the sludge tank.

9. The sealing device for closed sludge tanks according to claim 1, characterized in that: The seal is made of rubber.

10. A mud scraping device, characterized in that: Includes the sealing device for closed sludge ponds as described in any one of claims 1 to 9.

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