An improved connecting device for a double cone rotary dryer

Abstract

This utility model relates to an improved connecting device for a double cone rotary dryer. The connecting device mainly includes a rotary joint, a first flange, and a second flange. The first flange is bolted to the return pipe. The rotary joint is threaded to the first flange at its port. The rotary joint is threaded to the heat inlet pipe and wrapped with waterproof tape. A hollow shaft on the rotary joint passes through the return pipe connecting the tank body. A gasket is bolted to the second flange and connected to the tank body. This modification replaces the traditional mechanical seal at the dryer shaft end with a flange connection offering superior sealing performance, solving problems such as poor sealing, easy vacuum leakage, and wear and tear between the O-ring and the vacuum tube bushing causing debris to contaminate the material inside the tank.

Description

Technical Field

[0001] This invention relates to the technical field of pharmaceutical machinery, and more particularly to an improved connecting device for a double-cone rotary dryer. Background Technology

[0002] Currently, most double-cone rotary vacuum dryers use rotary joints for connection, with an O-ring seal near the drum. However, this seal has several obvious shortcomings: firstly, the sealing effect is poor, making vacuum leakage easy; secondly, with prolonged operation of the double-cone rotary vacuum dryer, the O-ring wears down, and debris from wear between the vacuum tube bushings gets trapped by the drum.

[0003] The negative pressure inside the drum draws in foreign matter, causing contamination of the material inside the drum.

[0004] The existing patent CN2765013Y combines a packing seal and a mechanical seal at the drum shaft end, achieving a better sealing effect than a traditional mechanical seal. However, it still cannot prevent the problem of wear-induced debris contaminating the material inside the drum. Therefore, this utility model proposes an improved connection device for a double cone rotary dryer, replacing the traditional mechanical seal at the dryer shaft end with a flange connection that offers superior sealing performance. This solves the problems of poor sealing effect, easy vacuum leakage, and wear-induced debris contamination of the material inside the drum due to wear between the O-ring and the vacuum tube bushing. Summary of the Invention

[0005] The purpose of this invention is to propose an improved connection device for a double cone rotary dryer, which replaces the traditional mechanical seal at the dryer shaft end with a flange connection that provides better sealing. This solves problems such as poor sealing performance, easy vacuum leakage, and wear of the O-ring and wear between the vacuum tube bushing and the debris that contaminates the material inside the drum.

[0006] The technical solution of this utility model is as follows:

[0007] An improved connecting device for a double cone rotary dryer is characterized in that the connecting device mainly includes a rotary joint, a first flange, and a second flange. The first flange is connected to the reflux pipe by bolts. The rotary joint is connected to the first flange by threaded connection at the port. The rotary joint is connected to the heat inlet pipe by threaded connection and by wrapping waterproof tape around the thread. The hollow shaft on the rotary joint passes through the reflux pipe connecting the tank body. The gasket and the second flange are connected to the tank body by bolts.

[0008] Furthermore, the first flange and the second flange are customized in size according to the reflux pipe and the tank interface, respectively.

[0009] Furthermore, the heat inlet pipe and the rotary joint are connected by threads and waterproof tape is wrapped around the threads and tightened to reinforce the seal.

[0010] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: the customized flange connection can be used for pipe connections of various diameters, pressures, and temperatures, and is suitable for harsh environments such as high pressure, high temperature, and corrosion. It has better sealing performance and solves the problem of poor sealing and easy leakage when the old-fashioned mechanical seal of the adapter is connected to the tank. It also avoids the problem that the mechanical seal of the current double cone rotary vacuum dryer, which uses an O-ring seal near the tank, will wear down over a long period of operation. The wear debris between the vacuum tube bushing and other debris will be drawn into the tank by the negative pressure inside the tank, thus avoiding foreign object contamination of the material inside the tank. Attached Figure Description

[0011] Figure 1 -Simplified structural diagram of this utility model.

[0012] In the attached drawings, the following labels are used: 1-Return pipe, 2-First flange, 3-Heat inlet pipe, 4-Rotary joint, 5-Hollow shaft, 6-Gasket, 7-Second flange, 8-Tank body. Detailed Implementation

[0013] Figure 1 The following is a detailed description of the structure of this utility model, with reference to the accompanying drawings: An improved connecting device for a double cone rotary dryer, characterized in that the connecting device mainly includes a rotary joint 4, a first flange 2, and a second flange 7. The first flange 2 is connected to the return pipe 1 by bolts. The rotary joint 4 is connected to the first flange 2 by threads at the port. The rotary joint 4 is connected to the heat inlet pipe 3 by threads and by wrapping waterproof tape around the threads. The hollow shaft 5 on the rotary joint 4 passes through the return pipe 1 connecting the tank body 8. The gasket 6 is connected to the second flange 7 by bolts to the tank body 8. The first flange 2 and the second flange 7 are customized according to the interface dimensions of the return pipe 1 and the tank body 8, respectively. The heat inlet pipe 3 is connected to the rotary joint 4 by threads and by wrapping waterproof tape around the threads for tightening and sealing. The customized flange connection used in this invention is suitable for pipe connections of various diameters, pressures, and temperatures. It is applicable to harsh environments such as high pressure, high temperature, and corrosion, and has better sealing performance. It solves the problem of poor sealing and easy leakage when connecting the tank with the mechanical seal of the old-fashioned adapter. It also avoids the problem of the mechanical seal of the current double cone rotary vacuum dryer, which uses an O-ring seal near the tank. Over time, the O-ring wears down and debris from wear between the vacuum tube bushings is drawn into the tank by the negative pressure inside the tank, thus avoiding foreign object contamination of the material inside the tank.

Claims

1. An improved connecting device for a double-cone rotary dryer, characterized in that: The connecting device mainly includes a rotary joint (4), a first flange (2), and a second flange (7). The first flange (2) is connected to the return pipe (1) by bolts. The rotary joint (4) is connected to the first flange (2) by threaded connection at the port. The rotary joint (4) is connected to the heat inlet pipe (3) by threaded connection and by wrapping waterproof tape around the thread. The hollow shaft (5) on the rotary joint (4) passes through the return pipe (1) of the connecting tank (8). The gasket (6) is connected to the second flange (7) and the tank (8) by bolts.

2. The apparatus according to claim 1, characterized in that: The first flange (2) and the second flange (7) are customized in size according to the interface of the return pipe (1) and the tank body (8).

3. The apparatus according to claim 1, characterized in that: The heat inlet pipe (3) and the rotary joint (4) are connected by threads and waterproof tape is wrapped around the threads and tightened to reinforce the seal.

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