A special packing type expansion joint for a plug removing device

Abstract

The utility model discloses a special packing type expansion joint of clearing and plugging device relates to the technical field of raw coal bunker, including the positioning pipe, the outer wall of the outer periphery of the lower end pipe of clearing and plugging pipe body is slidably sleeved, the inner wall of this positioning pipe and the outer wall of the lower end pipe of clearing and plugging pipe body are slid contact, and the pipe orifice of the lower end pipe of clearing and plugging pipe body is left with the sinking gap of the lower end port of positioning pipe, wherein, the inner wall of the upper port of positioning pipe has annular positioning groove, the limit cover is annular, is slidably sleeved in the outer wall of the lower end pipe of clearing and plugging pipe body and is fixedly connected with positioning pipe, and the lower end of the limit cover is inserted into positioning groove, and the positioning groove forms packing chamber with the outer wall of the lower end pipe of clearing and plugging pipe body and limit cover, a plurality of packing rings are respectively sleeved in packing chamber, the first flange is set up on the outer wall of the lower end port of positioning pipe, and the first flange is used for connecting the coal feeder body, and the utility model discloses avoid damaging the coal feeder body and have other advantages.

Description

Technical Field

[0001] This utility model relates to the technical field of raw coal bunkers, and in particular to a packing-type expansion joint for a blockage clearing device. Background Technology

[0002] Coal bunker unblocking devices are now widely used in major power plants. Traditional unblocking devices are rigidly connected to the coal feeder via flanges at the bottom. Typically, the capacity of a coal bunker in a thermal power plant is 300-500 tons. After coal is loaded into the bunker, some settling occurs. A rigidly connected unblocking device causes the entire weight of this settling to be transferred to the coal feeder, potentially causing deformation and affecting its metering accuracy. In severe cases, this could damage the feeder. Therefore, this application incorporates an expansion joint structure to prevent the settling force on the unblocking device from being transmitted to the coal feeder. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a packing-type expansion joint for a blockage clearing device, so as to solve the problem in the background art that after coal is fed into the coal bunker, it will cause settlement, and the gravity of the settlement will be applied to the coal feeder body, causing the coal feeder body to deform.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a packing-type expansion joint for a blockage clearing device, comprising...

[0005] Clear the blockage at the lower end of the pipe body;

[0006] The positioning tube is slidably sleeved on the outer periphery of the lower end tube of the unblocking tube body. The inner wall of the positioning tube is in sliding contact with the outer wall of the lower end tube of the unblocking tube body. A sinking gap is left between the tube opening of the lower end tube of the unblocking tube body and the lower port of the positioning tube.

[0007] The upper port of the positioning tube has an annular positioning groove on its inner wall.

[0008] The limiting sleeve is annular and is slidably sleeved on the outer wall of the lower end of the unblocking pipe body and fixedly connected to the positioning pipe. The lower end of the limiting sleeve extends into the positioning groove, and the positioning groove, the outer wall of the lower end of the unblocking pipe body, and the limiting sleeve form a packing chamber.

[0009] Several packing rings are respectively placed inside the packing chamber;

[0010] The first flange is located on the outer wall of the lower port of the positioning tube and is used to connect the coal feeder body.

[0011] Preferably, the limiting sleeve is provided with a second flange, which is fixedly connected to the positioning tube by a number of bolts.

[0012] Preferably, there are 1-3 packing rings.

[0013] The beneficial effects of adopting the above technical solutions are:

[0014] This application uses a positioning tube to connect to the coal feeder body, so that the positioning tube is sleeved around the lower end of the unblocking tube body and the installation height of the lower end of the unblocking tube body is increased, so that there is a sinking gap between the pipe opening of the lower end of the unblocking tube body and the pipe opening of the positioning tube. This allows the lower end of the unblocking tube body to move relative to the positioning tube when it sinks, without applying gravity to the coal feeder body. At the same time, the packing chamber and packing ring can prevent coal ash from leaking out. Attached Figure Description

[0015] Figure 1 This is a front view of a packing-type expansion joint for a blockage clearing device according to this utility model.

[0016] Figure 2 This is a cross-sectional view of a packing-type expansion joint for a blockage clearing device according to this utility model.

[0017] Figure 3 This is a schematic diagram of the positioning tube and limiting sleeve of this utility model.

[0018] The components include: the lower end pipe of the unblocking pipe body 10, the first flange 20, the positioning pipe 30, the positioning groove 31, the limiting sleeve 40, the second flange 41, the bolt 50, the packing chamber 60, the packing ring 70, and the sinking gap 80. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-3 In this first embodiment, a packing-type expansion joint for a blockage clearing device includes...

[0021] Clear blockage from the lower end of the pipe body, pipe 10;

[0022] The positioning tube 30 is slidably sleeved on the outer periphery of the lower end tube 10 of the unblocking tube body. The inner wall of the positioning tube 30 is in sliding contact with the outer wall of the lower end tube 10 of the unblocking tube body. A sinking gap 80 is left between the tube opening of the lower end tube 10 of the unblocking tube body and the lower port of the positioning tube 30.

[0023] The upper end of the positioning tube 30 has an annular positioning groove 31 on its inner wall.

[0024] The limiting sleeve 40 is annular and is slidably sleeved on the outer wall of the lower end pipe 10 of the unblocking pipe body and fixedly connected to the positioning pipe 30. The lower end of the limiting sleeve 40 extends into the positioning groove 31, and the positioning groove 31, the outer wall of the lower end pipe 10 of the unblocking pipe body, and the limiting sleeve 40 form a packing chamber 60. A second flange 41 is provided on the limiting sleeve 40, and the second flange 41 is fixedly connected to the positioning pipe 30 by several bolts 50.

[0025] Several packing rings 70 are respectively placed inside the packing chamber 60, and there are 1 to 3 packing rings 70;

[0026] The first flange 20 is located on the outer wall of the lower port of the positioning tube 30, and the first flange 20 is used to connect the coal feeder body.

[0027] This embodiment is implemented as follows:

[0028] In use, the first flange 20 is connected to the coal feeder body. When the lower end pipe 10 of the unblocking pipe body sinks and moves due to gravity, the lower end pipe 10 of the unblocking pipe body will move downward within the positioning pipe 30, causing the height of the sinking gap 80 to gradually shorten. This avoids the lower end pipe 10 of the unblocking pipe body from putting pressure on the coal feeder body. The multiple packing rings 70 in the packing chamber 60 formed by the positioning groove 31 on the positioning pipe 30, the lower end pipe 10 of the unblocking pipe body, and the limiting sleeve 40 can play a role in preventing coal ash leakage.

[0029] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A packing-type expansion joint for a blockage clearing device, characterized in that, include Clear blockage from the lower end of the pipe body; The positioning tube is slidably sleeved on the outer periphery of the lower end tube of the unblocking tube body. The inner wall of the positioning tube is in sliding contact with the outer wall of the lower end tube of the unblocking tube body. A sinking gap is left between the tube opening of the lower end tube of the unblocking tube body and the lower port of the positioning tube. The upper port of the positioning tube has an annular positioning groove on its inner wall. The limiting sleeve is annular and is slidably sleeved on the outer wall of the lower end of the unblocking pipe body and fixedly connected to the positioning pipe. The lower end of the limiting sleeve extends into the positioning groove, and the positioning groove, the outer wall of the lower end of the unblocking pipe body, and the limiting sleeve form a packing chamber. Several packing rings are respectively placed inside the packing chamber; The first flange is located on the outer wall of the lower port of the positioning tube and is used to connect the coal feeder body.

2. The packing-type expansion joint for a blockage clearing device according to claim 1, characterized in that, The limiting sleeve is equipped with a second flange, which is fixedly connected to the positioning tube by several bolts.

3. The packing-type expansion joint for a blockage clearing device according to claim 1, characterized in that, There are 1-3 packing rings.

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