CN215172243U

CN215172243U - Explosion-proof sealed operation control system of spiral shell machine carbocycle that crouches

Info

Publication number: CN215172243U
Application number: CN202022111419.8U
Authority: CN
Inventors: 卢仁伟; 高建生; 李邦; 王存林; 杨超
Original assignee: CSSC Nanjing Luzhou Machine Co Ltd
Current assignee: CSSC Nanjing Luzhou Machine Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-12-14
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses an explosion-proof sealed operation control system of carbocycle of spiral shell machine that crouches, including valve unit and supporting pipeline, the pipeline comprises a set of air inlet pipeline and four group's air outlet pipeline, air inlet pipeline's import department is connected with the nitrogen gas air supply, air inlet pipeline's rear parallel has four group's air outlet pipeline, and the gas outlet of each air outlet pipeline corresponds casing replacement gas, the sealed gas in casing both ends and the sealed gas of inlet pipe department respectively, and is provided with a plurality of valve units on each pipeline. The utility model ensures the sealing effect, prevents the process gas from leaking and prevents the air from entering the casing; various automatic instruments such as a flowmeter, a pressure gauge, a pressure sensor, a regulating valve and the like are arranged in the sealing control system, the sealing state of the explosion-proof horizontal screw machine can be monitored in time, various parameters can be set to alarm values, and an alarm is sent out in time when a fault occurs, so that the safety and reliability of the running state of the explosion-proof horizontal screw machine are ensured.

Description

Explosion-proof sealed operation control system of spiral shell machine carbocycle that crouches

Technical Field

The utility model relates to a gas supply control system of sealed system of carbocycle, specific operation control system is sealed to carbocycle of explosion-proof spiral shell machine of sleeping in that says so belongs to engineering technical field.

Background

The horizontal screw machine is a universal device for performing solid-liquid separation by using centrifugal force generated by high-speed rotation, and is widely applied to various industries in national economy. In some special industries, such as pharmaceutical industry and chemical industry, because combustible and toxic gases exist in the process, the horizontal screw machine needs to be sealed and explosion-proof, and the explosion-proof horizontal screw machine can be operated as soon as possible. To achieve a hermetic explosion-proof effect, an inert gas such as nitrogen is generally injected into the housing of the horizontal screw machine to prevent the process gas from leaking into the atmosphere and also to prevent air from entering the housing. In the actual process, nitrogen is generally directly introduced into a shell of the horizontal screw machine, the method can achieve a certain anti-explosion effect, but the hidden danger of leakage still exists at a plurality of sealing points of the horizontal screw machine, the operation process cannot be controlled, and the hidden danger of failure cannot be timely eliminated. Therefore, it is necessary to design a reliable and safe sealing control system and method to solve the above existing problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that these technical defects are to be overcome, the sealed operation control system of carbocycle of an explosion-proof spiral shell machine of lying and control method thereof that provides to improve the sealed reliability and the security of explosion-proof spiral shell machine of lying.

The utility model provides a technical scheme of above technical problem is: the utility model provides an explosion-proof sealed operation control system of carbocycle of spiral shell machine that crouches, includes valve unit and supporting pipeline, the pipeline comprises a set of inlet line and four group's air outlet pipeline, the import department of inlet line is connected with the nitrogen gas source, the rear of inlet line is parallelly connected to have four group's air outlet pipeline, and the gas outlet of each air outlet pipeline corresponds casing replacement gas, the sealed gas in casing both ends and the sealed gas of inlet pipe department respectively, and is provided with a plurality of valve units on each pipeline.

Furthermore, a pressure gauge PG11 for real-time nitrogen pressure coming from the outside is arranged at the end part of the air inlet pipeline, and a shell replacement pipeline and a carbon ring sealing pipeline are connected behind the pressure gauge PG11 in parallel; a ball valve V11, a flowmeter FG11, an adjusting stop valve V1, a check valve V4 and a pressure transmitter PT12 which displays the pressure in the shell in real time during the operation of the explosion-proof horizontal screw machine are sequentially arranged on the shell replacement pipeline along the gas flowing direction; be equipped with in proper order along gas flow direction on the carbocycle sealing line and filter the filtering valve group of getting rid of impurity, adjust the external nitrogen pressure's that gets into formula pressure regulating valves of relying on oneself, the nitrogen pressure that gets into the carbocycle sealing line is passed through pressure transmitter PT11 in real time to the rear of formula pressure regulating valves of standing alone, the carbocycle sealing line divides into the parallelly connected pipeline of giving vent to anger of three groups at pressure transmitter PT11 rear, is the sealed gas circuit at casing both ends and the sealed gas circuit of inlet pipe department respectively.

Furthermore, the sealed gas circuit at the two ends of the casing and the sealed gas circuit at the feeding pipe are provided with control valve groups consisting of a ball valve, a flowmeter, a check valve and a pressure gauge along the direction of gas flow.

Furthermore, the filtering valve group comprises a first filtering valve group and a second filtering valve group which are arranged in parallel, the first filtering valve group and the second filtering valve group are mutually standby, and when the first filtering valve group is opened, the second filtering valve group is in a closed state.

Furthermore, a pressure difference meter for displaying the pressure of the inlet and the outlet of the filter in real time is connected in parallel on the filter valve group.

Further, the self-operated pressure regulating valve group consists of a ball valve V5, a self-standing pressure reducing valve PCV11 and a ball valve V6 which are sequentially connected, a bypass ball valve V7 is also connected in parallel to the self-standing pressure regulating valve group, when the ball valves V5 and V6 are opened, the opening degree of the self-operated pressure reducing valve PCV11 is manually regulated, and the bypass ball valve V7 is in a closed state.

A control method of an anti-explosion horizontal screw machine carbon ring sealing operation control system comprises the following steps:

step 1, closing all valves in the system, opening nitrogen source valves in an external pipe network, and starting main sealing nitrogen to enter a control system;

step 2, opening a shell to replace a ball valve V11 on a pipeline, adjusting the opening degree of a stop valve V1, allowing nitrogen to enter an explosion-proof horizontal screw machine through a check valve V4 to perform purging replacement, displaying the air inlet flow by a flow meter FG11, and closing the ball valve V11 after replacement is finished;

step 3, putting a nitrogen filter F1, dividing the nitrogen filter into four steps of ball valves V1 and V2 in order to prevent the filter from being damaged due to overpressure of the filter, and waiting for 10 seconds after each step of opening and then carrying out the next step; at the moment, the filter F2 is in a standby state, the valves V3 and V4 are in a closed state, the nitrogen of the pipe network enters a control system, and the pressure of an air source is displayed by a pressure gauge PG 11;

and 4, opening the ball valves V5 and V6, enabling the bypass ball valve V7 to be in a closed state, manually adjusting the opening degree of a self-operated pressure reducing valve PCV11, controlling the pressure value of main seal air to be 0.05-0.07MPa, namely the display value of a pressure transmitter PT11, opening the ball valves V8, V9 and V10 in four steps in order to prevent a carbon ring in the following carbon ring seal from being damaged due to impact, waiting for 10 seconds after each step of opening, then carrying out the next step, enabling nitrogen to enter the carbon ring seal, displaying the air inlet flow by flow meters FG12, FG13 and FG14, and displaying the air inlet pressure by pressure meters PG12, PG13 and PG 14.

The utility model has the advantages that: the utility model provides a pair of explosion-proof sealed operation control system of carbocycle of spiral shell machine of crouching and control method thereof has set up the carbocycle at 3 dynamic seal points of the spiral shell machine of crouching and has sealed the air feed control system of one set of carbocycle: before the horizontal screw machine is started, a large amount of nitrogen is introduced into the shell by the system, and air in the shell is quickly replaced, so that the interior of the shell is in an inert micro-positive pressure state; after the horizontal screw machine feeds materials, nitrogen is introduced into 3 dynamic sealing points in real time, so that the sealing effect is ensured, and process gas leakage and air entering into the shell are prevented; various automatic instruments such as a flowmeter, a pressure gauge, a pressure sensor, a regulating valve and the like are arranged in the sealing control system, the sealing state of the explosion-proof horizontal screw machine can be monitored in time, various parameters can be set to alarm values, and an alarm is sent out in time when a fault occurs, so that the safety and reliability of the running state of the explosion-proof horizontal screw machine are ensured.

The utility model discloses structure is rigorous, rationally distributed, convenient to use and cost of manufacture are low, can satisfy the market demand that needs develop this work.

Drawings

The following provides a further description of the present invention with reference to the accompanying drawings and detailed description.

Fig. 1 is the flow chart of the operation control system for carbon ring sealing of the explosion-proof horizontal screw machine of the utility model.

Detailed Description

Examples

The embodiment provides a carbon ring sealing operation control system and a carbon ring sealing operation control method of an explosion-proof horizontal screw machine. The specific implementation mode is as follows: the carbon ring seal is arranged at 3 dynamic seal points (the two ends of the machine shell and the feed pipe) of the horizontal screw machine, the design utility model discloses a set of sealed air supply control system, and the control system is shown in figure 1.

The sealing control system is provided with a ball valve, a stop valve, a flowmeter, a pressure gauge, a pressure transmitter, a filter, a self-operated pressure regulating valve, a check valve and a matched pipeline, and the specific configuration is shown in the figure. One path of air inlet is divided into four paths of outlets after passing through the system: air is replaced in the machine shell, air is sealed at two ends of the machine shell, and air is sealed at the feeding pipe. The pressure transmitter PT12 can display the pressure in the shell in the running process of the explosion-proof horizontal screw machine in real time and can monitor the pressure, and the alarm can be given when the pressure value is too high or too low; the pressure transmitter PT11 can display the pressure of nitrogen entering the 3 carbon ring seals in real time and can monitor the pressure, and an automatic alarm can be given when the pressure value is too low; the self-operated pressure regulating valve PCV11 can regulate the pressure of nitrogen coming from the outside, and ensure the stable gas supply to the sealing device in time; the filters F1 and F2 are mutually standby and can filter outside nitrogen to remove impurities, a pressure difference meter is arranged on the filters and can display the pressure of the inlet and the outlet of the filters in real time, and once the filters are blocked, an alarm can be automatically given to remind that the filter elements need to be replaced; the flow meter FG11 can display the flow rate of nitrogen entering the enclosure in real time during replacement, and the flow meters FG12, FG13 and FG14 can display the flow rate of nitrogen entering the interior of the 3-carbon ring seal in real time; the pressure gauge PG11 can display the pressure of nitrogen entering the inside of the 3 carbon ring seal in real time, and the pressure gauges PG12, PG13 and PG14 can display the pressure of the nitrogen entering the inside of the 3 carbon ring seal in real time; various ball valves and stop valves in the system can be opened and closed according to actual needs, and the check valves can prevent sealed gas from flowing backwards.

The use method of the sealing operation control system is as follows:

all valves in the system are closed first,

opening a nitrogen source valve of an external pipe network, and starting main sealing nitrogen to enter a control system;

and opening a ball valve V11 on the replacement pipeline, adjusting the opening degree of a stop valve V1, introducing nitrogen into the explosion-proof horizontal screw machine through a check valve V4 for purging and replacement, and displaying the flow rate of inlet air by a flow meter FG 11. And closing the ball valve V11 after the replacement is finished.

The nitrogen filter F1 is put into use, the ball valves V1 and V2 are opened slowly, the filter F2 is in a standby state, the valves V3 and V4 are in a closed state, then the nitrogen in the pipe network enters the control system, and the pressure of the air source is displayed by the pressure gauge PG 11.

Opening ball valves V5 and V6, wherein the bypass ball valve V7 is in a closed state, manually adjusting the opening degree of a self-operated pressure reducing valve PCV11 to control the pressure value of main seal air in a proper range (the value displayed by a pressure transmitter PT 11), slowly opening ball valves V8, V9 and V10 to enable nitrogen to enter a carbon ring seal, displaying the air inlet flow by flow meters FG12, FG13 and FG14, and displaying the air inlet pressure by pressure meters PG12, PG13 and PG 14.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. The utility model provides an explosion-proof sealed operation control system of carbocycle of spiral shell machine that crouches which characterized in that: the device comprises a control valve group and matched pipelines, wherein the pipelines comprise a group of air inlet pipelines and four groups of air outlet pipelines, the inlet of each air inlet pipeline is connected with a nitrogen gas source, the rear of each air inlet pipeline is connected with four groups of air outlet pipelines in parallel, the air outlets of the air outlet pipelines respectively correspond to casing replacement gas, casing two-end sealing gas and inlet pipe sealing gas, and each pipeline is provided with a plurality of control valve groups.

2. The carbocyclic ring seal operation control system of an explosion-proof horizontal screw machine according to claim 1, characterized in that: a pressure gauge PG11 for measuring the pressure of nitrogen coming from the outside in real time is arranged at the end part of the air inlet pipeline, and a shell replacement pipeline and a carbon ring sealing pipeline are connected in parallel behind the pressure gauge PG 11; a ball valve V11, a flowmeter FG11, an adjusting stop valve V1, a check valve V4 and a pressure transmitter PT12 which displays the pressure in the shell in real time during the operation of the explosion-proof horizontal screw machine are sequentially arranged on the shell replacement pipeline along the gas flowing direction; be equipped with in proper order along the gas flow direction on the carbocycle sealing line and filter the filtering valve group of getting rid of impurity, adjust the self-operated pressure regulating valves of the nitrogen pressure of external entering, the nitrogen pressure that gets into the carbocycle sealing line is passed through pressure transmitter PT11 real-time display at the rear of self-supporting pressure regulating valves, the carbocycle sealing line is divided into the parallelly connected air outlet pipe way of three groups at pressure transmitter PT11 rear, is the sealed gas circuit at casing both ends and the sealed gas circuit of inlet pipe department respectively.

3. The carbocyclic ring seal operation control system of an explosion-proof horizontal screw machine according to claim 2, characterized in that: and control valve groups consisting of ball valves, flow meters, check valves and pressure gauges are arranged on the sealed gas circuits at the two ends of the shell and the sealed gas circuits at the feed pipes along the direction of gas flow.

4. The carbocyclic ring seal operation control system of an explosion-proof horizontal screw machine according to claim 2, characterized in that: the filter valve group comprises a first filter valve group and a second filter valve group which are arranged in parallel, the first filter valve group and the second filter valve group are mutually standby, and when the first filter valve group is opened, the second filter valve group is in a closed state.

5. The carbocyclic ring seal operation control system of an explosion-proof horizontal screw machine according to claim 4, characterized in that: and the filtering valve group is also connected in parallel with a pressure difference meter for displaying the pressure of the inlet and the outlet of the filter in real time.

6. The carbocyclic ring seal operation control system of an explosion-proof horizontal screw machine according to claim 2, characterized in that: the self-operated pressure regulating valve group is composed of a ball valve V5, a self-standing pressure reducing valve PCV11 and a ball valve V6 which are sequentially connected, a bypass ball valve V7 is further connected in parallel to the self-standing pressure regulating valve group, when the ball valves V5 and V6 are opened, the opening degree of the self-operated pressure reducing valve PCV11 is manually regulated, and the bypass ball valve V7 is in a closed state.