CN215086948U

CN215086948U - Pressure maintaining mechanical sealing equipment

Info

Publication number: CN215086948U
Application number: CN202121598321.8U
Authority: CN
Inventors: 于峰; 赵月东; 张绍波
Original assignee: Tianjin Yifeng Industry And Trade Co ltd
Current assignee: Tianjin Yifeng Industry And Trade Co ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-12-10
Anticipated expiration: 2031-07-14

Abstract

The application discloses pressure maintaining mechanical sealing equipment which comprises a mechanical seal, a liquid supplementing cylinder and a charging tank; one side of the mechanical seal is provided with a liquid replenishing cylinder; the liquid supplementing cylinder comprises a cylinder body, a piston, a pressure inlet, an oil outlet and a charging tank interface; the interior of the cylinder body is hollow and is provided with a piston in a sliding way; the bottom surface of the cylinder body is provided with a pressure inlet; an oil outlet is formed in one side, close to the mechanical seal, of the top end of the cylinder body, and a feeding tank connector is formed in the other side of the top end of the cylinder body. The automatic fluid infusion of pressurize mechanical seal equipment of this application, leakproofness are good, easy operation convenience, life height.

Description

Pressure maintaining mechanical sealing equipment

Technical Field

The application relates to the technical field of mechanical sealing, in particular to pressure maintaining mechanical sealing equipment.

Background

The mechanical seal is a shaft seal device of a rotating machine. The method is widely applied to equipment such as centrifugal pumps, centrifuges, reaction kettles, compressors and the like. Since the drive shaft penetrates inside and outside the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks to the outside, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, and therefore a shaft sealing device for preventing leakage is necessary.

In the use process of the reaction kettle, substances in the reaction kettle are often subjected to operations such as heating or pressurization, the internal pressure of the reaction kettle is increased, and when the internal pressure of the reaction kettle is greater than that of the mechanical seal, the mechanical seal is often subjected to high pressure, so that the phenomena of leakage, damage or failure and the like occur.

Disclosure of Invention

In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a pressure-maintaining mechanical sealing device with automatic fluid infusion, good sealing performance, simple and convenient operation, and long service life.

The application provides a pressure maintaining mechanical sealing device which comprises a mechanical seal, a liquid supplementing cylinder and a charging tank; one side of the mechanical seal is provided with a liquid replenishing cylinder; the liquid supplementing cylinder comprises a cylinder body, a piston, a pressure inlet, an oil outlet and a charging tank interface; the interior of the cylinder body is hollow and is provided with a piston in a sliding way; the bottom surface of the cylinder body is provided with a pressure inlet; an oil outlet is formed in one side, close to the mechanical seal, of the top end of the cylinder body, and a feeding tank connector is formed in the other side of the top end of the cylinder body.

Preferably, the piston comprises a piston cylinder and a connecting column; two piston cylinders are arranged in an up-down symmetrical manner; the upper part and the lower part of the two piston cylinders are fixedly connected through a connecting column; the axes of the two piston cylinders are coincided with the axis of the connecting column.

Preferably, the oil outlet is detachably communicated with the mechanically sealed sealing cavity through an oil pipeline; the pressure inlet is detachably communicated with the mechanically sealed reaction kettle through a pressure inlet pipeline.

Preferably, the bottom end of the feeding tank is fixedly provided with a one-way valve; one end of the one-way valve far away from the feeding tank is detachably connected with the feeding tank interface.

Preferably, rubber gaskets are arranged at the joints of the mechanical seal, the liquid supplementing cylinder, the feeding tank, the oil material pipeline and the pressure inlet pipeline.

Preferably, the fluid infusion cylinder is integrally formed.

Compared with the prior art, the beneficial effects of this application are:

(1) according to the oil supplementing device, the liquid supplementing cylinder is arranged and used for supplementing oil to enter the mechanically sealed cavity, the cylinder body of the liquid supplementing cylinder is only provided with three connectors, the sealing performance is good, the installation and the disassembly are convenient and simple, and the oil liquid on the upper portion of the piston can be pushed into the mechanically sealed cavity when the piston is pushed under the high pressure of the reaction kettle, so that the effects of balancing the pressure difference and preventing leakage are achieved;

(2) this application is through setting up the feeding tank, and the feeding tank communicates with fluid infusion section of thick bamboo through a check valve, and the liquid in the fluid infusion section of thick bamboo can not flow into the feeding tank under the normal condition, only needs to open the feeding tank and impress the oil when replenishing the oil, and is simple swift, has increased the life of fluid infusion section of thick bamboo simultaneously.

It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a pressure maintaining mechanical sealing apparatus provided in an embodiment of the present application;

fig. 2 is a schematic cross-sectional structure view of a liquid replenishing cylinder of a pressure maintaining mechanical sealing device according to an embodiment of the present application.

Reference numbers in the figures: 1. mechanical sealing; 2. a fluid infusion cylinder; 3. a charging tank; 4. an oil pipeline; 5. A pressure inlet pipeline;

21. a barrel; 22. a piston; 23. an oil outlet; 24. a pressure inlet; 25. a charging tank interface;

31. a one-way valve;

221. a piston cylinder; 222. connecting columns.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for the convenience of description, only the portions relevant to the application are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 and fig. 2, an embodiment of the present application provides a pressure maintaining mechanical sealing apparatus, including a mechanical seal 1, a fluid replenishing cylinder 2, and a charging tank 3; one side of the mechanical seal 1 is provided with a liquid supplementing cylinder 2; the liquid supplementing cylinder 2 comprises a cylinder body 21, a piston 22, a pressure inlet 24, an oil outlet 23 and a feeding tank interface 25; the cylinder 21 is hollow and is provided with a piston 22 in a sliding way; the bottom surface of the cylinder 21 is provided with a pressure inlet 24; an oil outlet 23 is arranged on one side of the top end of the cylinder 21 close to the mechanical seal 1, and a feed tank connector 25 is arranged on the other side. In this embodiment, mechanical seal 1's below is reation kettle, mechanical seal 1's one side is provided with fluid infusion section of thick bamboo 2, fluid infusion section of thick bamboo 2 is used for supplementing the sealed chamber that the oil got into mechanical seal 1, fluid infusion section of thick bamboo 2 is hollow cylinder, and barrel 21 only has three interface, the good difficult liquid leakage that takes place of leakproofness, the outer wall of piston 22 is hugged closely with the inner wall of barrel 21, fluid infusion section of thick bamboo 2 can push mechanical seal 1's sealed chamber with the oil liquid on piston 22 upper portion when reation kettle's high pressure promotes piston 22, thereby reach automatic balance pressure differential, prevent the effect of leaking.

In a preferred embodiment, the piston 22 includes a piston cylinder 221 and a connecting post 222; two piston cylinders 221 are arranged up and down symmetrically; the two piston cylinders 221 are fixedly connected up and down through a connecting column 222; the axes of both piston cylinders 221 coincide with the axis of the connecting post 222.

Referring to fig. 2, in this embodiment, the piston 22 is a core of the fluid infusion cylinder 2, the two piston cylinders 221 respectively separate upper and lower portions of the piston 22, and a space is formed therebetween, an outer wall of the piston cylinder 221 is tightly attached to an inner wall of the fluid infusion cylinder 2, when oil on the upper portion of the piston 22 leaks, the space between the two piston cylinders 221 can store the leaked oil, so as to prevent the oil from directly leaking to the lower portion of the piston 22, reduce the internal leakage of the fluid infusion cylinder 2, and increase the service life of the fluid infusion cylinder 2.

In a preferred embodiment, the oil outlet 23 is detachably communicated with the sealing cavity of the mechanical seal 1 through the oil pipeline 4; the pressure inlet 24 is detachably communicated with the reaction kettle of the mechanical seal 1 through a pressure inlet pipeline 5.

Referring to fig. 1, in this embodiment, when the pressure in the reaction kettle changes, the pressure is quickly reflected into the fluid infusion cylinder 2 through the pressure inlet pipe 5, the piston 22 is pushed by the high pressure to displace upward, and the oil fluid is delivered to the sealing cavity of the mechanical seal 1 through the oil pipe 4.

In a preferred embodiment, the bottom end of the feeding tank 3 is fixedly provided with a one-way valve 31; one end of the one-way valve 31 far away from the feeding tank 3 is detachably connected with the feeding tank interface 25.

Referring to fig. 1, in this embodiment, the check valve 31 enables the oil liquid in the feeding tank 3 to flow into the fluid infusion cylinder 2 only in one direction, and prevents the liquid in the fluid infusion cylinder 2 from flowing to the feeding tank 3 in the opposite direction, so as to increase the safety of the fluid infusion cylinder 2 and facilitate and speed the addition of the oil.

In a preferred embodiment, rubber gaskets are arranged at the joints of the mechanical seal 1, the liquid supplementing cylinder 2, the feeding tank 3, the oil material pipeline 4 and the pressure inlet pipeline 5.

Referring to fig. 1, the mechanical seal 1, the fluid infusion cylinder 2, the feeding tank 3, the oil pipe 4 and the pressure inlet pipe 5 are all mounted by flanges matching with screws and nuts, and a rubber gasket is arranged between the two connected flanges, so that the mounting and dismounting are convenient and simple, and the sealing performance is improved.

In a preferred embodiment, the fluid infusion cylinder 2 is integrally formed.

Referring to fig. 1, in this embodiment, the welding points are reduced by the integral molding, the sealing performance of the fluid infusion cylinder 2 is improved, and the service life of the fluid infusion cylinder 2 is prolonged.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Pressure maintaining mechanical sealing equipment is characterized by comprising a mechanical seal, a liquid supplementing cylinder and a charging tank; one side of the mechanical seal is provided with the liquid replenishing cylinder; the liquid supplementing cylinder comprises a cylinder body, a piston, a pressure inlet, an oil outlet and a charging tank interface; the interior of the cylinder body is hollow, and the piston is arranged in a sliding manner; the pressure inlet is formed in the bottom surface of the cylinder body; the oil outlet is formed in one side, close to the mechanical seal, of the top end of the cylinder body, and the feeding tank connector is formed in the other side of the top end of the cylinder body.

2. The dwell mechanical seal apparatus of claim 1, wherein the piston comprises a piston cylinder and a connecting column; two piston cylinders are arranged in an up-down symmetrical manner; the upper part and the lower part of the two piston cylinders are fixedly connected through the connecting column; the axes of the two piston cylinders are coincided with the axis of the connecting column.

3. The apparatus of claim 2, wherein the oil outlet is in removable communication with the seal cavity of the mechanical seal via an oil conduit; the pressure inlet is detachably communicated with the mechanically sealed reaction kettle through a pressure inlet pipeline.

4. The pressure maintaining mechanical sealing device according to claim 3, wherein a one-way valve is fixedly arranged at the bottom end of the feed tank; one end of the one-way valve far away from the feeding tank is detachably connected with the feeding tank interface.

5. The pressure maintaining mechanical sealing device according to claim 4, wherein rubber gaskets are arranged at joints of the mechanical seal, the liquid supplementing cylinder, the feeding tank, the oil pipeline and the pressure inlet pipeline.

6. The apparatus of claim 5, wherein the fluid replenishment cartridge is integrally formed.