CN209309326U - An embedded sealing device for a screw conveyor - Google Patents

Abstract

The utility model relates to an embedded sealing device of a screw conveyor, comprising: a conveyor shell, an upper cover plate, a screw shaft and a screw blade, and is characterized in that it also includes several pressure relief exhaust pipes, sealing end covers, reducing Pressure ring, baffle plate, moving ring seal and static ring seal, the sealing end cover is arranged outside the tail end of the conveyor shell, one end of the static ring seal is fixedly connected to the sealing end cover, and the other end is inserted into the conveyor Inside the casing, it is arranged concentrically on the outside of the screw shaft. The moving ring seal is a moving ring seal with a convex edge. Combined sleeve sealing mechanism. The utility model has the advantages that: by adopting the method of pressure relief exhaust pipe pressure relief, decompression ring decompression, baffle plate blocking, dynamic ring seals and static ring seals embedded in socket seals, the spiral seal is fundamentally eliminated. Conveyor dust pollution problem, while reducing the labor intensity of workers.

Description

An embedded sealing device for a screw conveyor

technical field

The utility model belongs to the technical field of screw conveyors, in particular to an embedded sealing device suitable for low-speed screw conveyors.

Background technique

At present, a large number of rotating equipment with rotating shafts are used in industrial production, and the sealing problem related to rotating equipment has always been a relatively difficult problem to solve. Especially for equipment with harsh working environment, poor sealing will cause serious environmental pollution. For high-speed equipment seals, such as single-end seals, double-end seals, split seals, etc. used in water pumps, fans, etc., the price is high, the requirements for working conditions are high, the installation and commissioning are complicated, and it is not suitable for parts with poor working environments. And basically cannot repair after damage, maintenance cost is high. For the sealing of low-speed equipment, due to its low speed, the installation accuracy is often not high, and the axial force is relatively small, so it is relatively easy to solve the problem of the end seal.

As a kind of material conveying equipment, the screw conveyor has a low speed and the internal medium is dust, which has fine particles and strong fluidity. When the screw conveyor is working, the gas-solid two-phase mixture is present inside. The screw conveyor mainly includes: the conveyor shell, the upper cover plate, and the screw shaft set in the middle of the conveyor shell. The screw blade is installed on the screw shaft. The end cover of the screw conveyor is usually sealed with packing. The packing type seal mainly meets the sealing requirements by periodically replacing the packing, which determines that the packing type seal cannot achieve a long-term good sealing effect. The normal situation is that after the screw conveyor has been running for a period of time, due to the gradual increase of the gap between the filler and the shaft, when the screw shaft rotates, a large axial positive pressure will be generated on the end cover of the screw conveyor, causing dust to leak out in a jet-like manner, polluting environment, affect the health of workers at the post, and increase labor intensity. Therefore, a new sealing device with simple structure is needed to solve the problem of equipment dust leaking and polluting the environment.

Contents of the invention

The purpose of the utility model is to provide an embedded sealing device of a screw conveyor with simple structure and good sealing effect.

The purpose of this utility model is achieved through the following technical solutions:

The utility model relates to an embedded sealing device of a screw conveyor, comprising: a conveyor shell, an upper cover plate, a screw shaft set in the middle of the inside of the conveyor shell, and a screw blade is installed on the screw shaft, and its characteristics It also includes several pressure relief exhaust pipes, sealing end covers, decompression rings, material baffles, dynamic ring seals and static ring seals. One end of the ring seal is fixedly connected to the sealing end cover, and the other end is inserted into the conveyor shell, and is arranged concentrically on the outside of the screw shaft. The moving ring seal is a moving ring seal with a convex edge. The screw shaft is fixedly connected, and the other end is embedded in the static ring seal to form an embedded combined sleeve sealing mechanism. A sealing ring is provided between the static ring seal and the dynamic ring seal. The pressure reducing ring is fixedly sleeved on the screw On the shaft, the baffle plate is set on the screw shaft and fixedly connected to the shell of the screw conveyor. The decompression ring and the baffle plate are sequentially arranged between the tail screw blade and the moving ring seal. The pressure relief exhaust pipe described above is arranged on the cover plate.

A dust bag is set on the pressure relief exhaust pipe, and there are 3 to 4 pressure relief exhaust pipes.

The lengths of the moving ring seal and the static ring seal are both 100 mm, the outer diameter of the moving ring seal is smaller than the inner diameter of the static ring seal, and the axial distance between the sealing sleeve and the static ring seal is mm 8 ~10mm.

The utility model has the advantages of:

The dust pollution problem of the screw conveyor is fundamentally eliminated by adopting the methods of decompression of the pressure relief exhaust pipe, decompression of the decompression ring, blocking of the baffle plate, and insertion of the dynamic ring seal and the static ring seal into the socket seal. At the same time, the labor intensity of workers is reduced.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, an embedded sealing device for a screw conveyor of the present utility model includes: a conveyor housing 1, an upper cover plate 2, and a screw shaft 3 set in the middle of the conveyor housing 1. The screw shaft 3 is equipped with a screw blade 4, which is characterized in that it also includes several pressure relief exhaust pipes 11, a sealing end cover 10, a decompression ring 5, a baffle plate 6, a moving ring seal 7 and a static ring seal 9 , the sealing end cover 10 is arranged outside the tail end of the conveyor housing 1, one end of the static ring seal 9 is firmly connected to the sealing end cover 1, the other end is inserted into the conveyor housing 1, and is concentrically arranged on the screw shaft 3 On the outside, the moving ring seal 7 is a moving ring seal with a convex edge, and its convex edge end is fixedly connected with the screw shaft 3, and the other end is embedded in the static ring seal 9 to form an embedded combined sleeve sealing mechanism , a seal ring 8 is provided between the static ring seal 9 and the dynamic ring seal 7, the decompression ring 5 is fixedly set on the screw shaft 3, and the described baffle plate 6 is set on the screw shaft 3, And it is fixedly connected with the screw conveyor shell 1, the decompression ring 5 and the baffle plate 6 are sequentially arranged between the tail screw blade 4 and the moving ring seal 7, and the pressure relief exhaust pipe 11 is arranged in the On the cover plate 2, a dust bag is set on the pressure relief exhaust pipe 11, and the number of the pressure relief exhaust pipe 11 is 3-4.

The working principle of the utility model is: when the screw conveyor is working, the internal pressure is greater than the external pressure, and it is easy to leak ash from the weak point of the seal; Press exhaust pipe 11, and be set with dust bag on it, in order to reduce internal pressure. Because the utility model arranges the decompression ring 5 on the screw shaft 3, and utilizes the material baffle plate 6 behind to stop the material, to reduce the impact force of the material on the seal, prolonging the service life of the seal. At the same time, because the utility model adopts the embedded combined sleeve sealing mechanism, for the materials already located at the seals, the method of inserting the movable ring seal 7 and the static ring seal 9 into the socket seal increases the dust passing distance and isolates the material. The external force is eliminated, and the way of dust leakage is blocked, which fundamentally solves the sealing problem.

Claims (3)

1. An embedded sealing device for a screw conveyor, comprising: a conveyor housing, an upper cover plate, a screw shaft set in the middle of the inside of the conveyor housing, a screw blade is installed on the screw shaft, and it is characterized in that It includes several pressure relief exhaust pipes, sealing end caps, decompression rings, baffle plates, dynamic ring seals and static ring seals. One end of the part is fixedly connected with the sealing end cover, and the other end is inserted into the conveyor shell, and is arranged concentrically on the outside of the screw shaft. Fixed connection, the other end is embedded in the static ring seal to form an embedded combined sleeve sealing mechanism, a sealing ring is provided between the static ring seal and the dynamic ring seal, and the pressure reducing ring is fixedly sleeved on the screw shaft , the baffle plate is set on the screw shaft and fixedly connected with the screw conveyor shell, the decompression ring and the baffle plate are sequentially arranged between the tail screw blade and the moving ring seal, and the The pressure relief exhaust pipe is arranged on the cover plate. 2. The embedded sealing device of a screw conveyor according to claim 1, characterized in that a dust bag is set on the pressure relief exhaust pipe, and there are 3 to 4 pressure relief exhaust pipes . 3. The embedded sealing device of a screw conveyor according to claim 1, wherein the lengths of the dynamic ring seal and the static ring seal are both 100 mm, and the outer diameter of the dynamic ring seal is smaller than the static ring seal. The inner diameter of the ring seal, the axial distance between the sealing sleeve and the static ring seal is mm 8-10mm.