CN205073747U - From basket pipe -line filter of blowdown - Google Patents

Abstract

The utility model relates to a from basket pipe -line filter of blowdown, be equipped with import takeover and the filter barrel that the export was taken over, the upper end is equipped with the strainer cover respectively including the side, the setting has or not end filter basket in the filter barrel, the filter barrel still is connected with bottom sewage pipes, bottom sewage pipes's exit end is connected with the preceding isolating valve of blowdown, the exit end of isolating valve is connected with pneumaticly or electronic blowoff valve before the blowdown. The utility model discloses simple structure, convenient to use, the in time impurity in the automatic discharge fluid (liquid or gas) to can the assurance system stability of operation, alleviateed workman's working strength, fine spreading value has.

Description

Self-draining basket strainer

technical field

The utility model relates to a filter. Specifically relates to a filter used for transporting fluid pipelines containing solid particles.

Background technique

Existing basket-type pipeline filters are mainly divided into two categories, the first category is a traditional bottomed basket, and the second category uses a bottomless basket, but both require manual sewage discharge.

In the actual use process, it is often encountered that the medium in the pipeline contains more solid particles (impurities), and it is more difficult to discharge sewage at this time. If the first type of basket filter with a bottom is used, it is usually necessary to open the top cover of the filter many times, which is a lot of work and will affect the normal production. If the second type of bottomless basket filter is used, the operator needs to perform manual sewage discharge operations many times. Since these two methods require a lot of manual operations, it is difficult to guarantee the timeliness of sewage discharge, and the labor intensity of the operators is high.

Utility model content

The technical problem to be solved by the utility model is to provide a self-drainage basket type pipeline filter, which can calculate the amount of solid particles (impurities) in the filter according to the pressure difference between the inlet and outlet of the filter, and according to the set The value is timely to open or close the blowdown valve to achieve the purpose of automatic blowdown.

The technical scheme of the utility model is as follows:

A self-draining basket type pipeline filter, including a filter cylinder with an inlet joint and an outlet joint on the side and a filter cover on the upper end, a bottomless filter basket is arranged in the filter cylinder; the filter cylinder is also connected There is a bottom sewage pipeline; the feature is that: the outlet end of the bottom sewage pipeline is connected with an isolation valve before sewage discharge; the outlet end of the isolation valve before sewage discharge is connected with a pneumatic or electric sewage valve.

A filter basket mounting flange is fixedly installed on the inner wall of the filter cylinder, and a filter basket limit card slot is installed at the inner bottom of the filter cylinder, the bottom of the bottomless filter basket is stuck in the limit card of the filter basket, and the upper end is in contact with the filter basket. fixed to the basket mounting flange.

The self-draining basket type pipeline filter also includes a control module connected with the pneumatic or electric blowdown valve and used to control the opening and closing of the pneumatic or electric blowdown valve; the control module is connected with a filter for real-time detection Differential pressure transmitter for the differential pressure of the fluid in the barrel.

The positive and negative pressure measuring points of the differential pressure transmitter are respectively located on the fluid inlet side and the fluid outlet side of the filter cylinder.

The bottom inner wall of the filter cylinder is semicircular or semielliptical.

An exhaust port and a vertical suspension device are arranged on the filter cover.

The positive effect of the utility model is:

The utility model is simple in structure, easy to use, can automatically discharge impurities in the fluid (liquid or gas) in time, can ensure the stability of the system operation, reduces the work intensity of workers, and has good promotion value.

The utility model is equipped with a vertical suspension device on the filter cover, which greatly reduces the difficulty of filter internal maintenance, especially for filters with relatively large pipe diameter and relatively high fluid pressure, the effect is more obvious.

Description of drawings

Fig. 1 is a schematic diagram of the structure and working principle of the embodiment of the utility model. The arrows in the figure indicate the flow direction of liquid or gas.

detailed description

Further illustrate the utility model below in conjunction with accompanying drawing and embodiment.

As shown in Figure 1, this embodiment includes a filter cylinder 6 with an inlet connecting pipe 1 and an outlet connecting pipe 8 on the side and a filter cover 2 on the upper end, and a flange connection between the filter cover 2 and the filter cylinder 6 . The filter cover 2 is provided with an exhaust port 3 and a vertical suspension device 4 .

A bottomless filter basket 5 is arranged inside the filter cylinder 6 . A filter basket mounting flange 7 is fixedly installed on the inner wall of the filter cylinder 6, and a filter basket limit card slot 9 is installed at the inner bottom of the filter cylinder 6, and the bottom of the bottomless filter basket 5 is stuck on the filter basket limit card In the groove 9, the upper end and the filter basket mounting flange 7 are fixed by bolts. The filter cylinder 6 is also connected with a bottom sewage pipe 10 . The bottom inner wall of the filter cylinder 6 is semi-circular or semi-elliptical to facilitate the removal of dirt.

The outlet end of the bottom blowdown pipeline 10 is connected with an isolation valve 11 before blowdown. A pneumatic or electric blowdown valve 12 is connected to the outlet end of the isolation valve 11 before blowdown.

This embodiment also includes a control module 13 connected with the pneumatic or electric blowdown valve 12 and used to control the opening and closing of the pneumatic or electric blowdown valve 12 . The control module 13 is connected with a differential pressure transmitter 14 for real-time detection of the fluid pressure difference between the inlet and outlet of the filter cylinder 6 . The positive pressure end (ie positive pressure measuring point) of the differential pressure transmitter 14 is set on the side of the inlet connecting pipe 1 , and the negative pressure end (ie negative pressure measuring point) is set on the side of the outlet connecting pipe 8 .

When in use, the filter of the utility model is installed in the pipeline, and attention should be paid to the direction of the inlet and outlet can not be reversed, the exhaust port 3 on the filter cover 2 should be opened before the initial use or after opening the cover for maintenance, and the air in the filter After the air is exhausted, tighten the exhaust plug, the isolation valve 11 remains open before the sewage discharge, and the pneumatic or electric sewage valve 12 remains closed.

The fluid (liquid or gas) in the pipeline enters the filter cylinder 6 from the inlet nozzle 1, enters the bottomless filter basket 5 through the upper port, and passes through the filter holes of the bottomless filter basket 5 to reach the bottomless filter basket 5 and the filter. The annular cavity between the cylinders 6 finally flows out of the filter from the outlet connection 8 . Bottomless filter baskets 5 with different filter pore sizes can be selected according to the requirements of the system for filtration accuracy, so as to achieve the best filtration effect.

The solid particles (impurities) in the fluid stay in the bottomless filter basket 5 and gradually deposit at the bottom of the bottomless filter basket 5 . As the solid particles (impurities) accumulate more and more, the resistance loss of the fluid (liquid or gas) passing through the filter gradually increases. When the resistance loss reaches the set value A, the signal fed back by the differential pressure transmitter 14 is transmitted to the control module 13. After judgment, the control module 13 issues an instruction to open the pneumatic or electric drain valve 12, and the solid particles (impurities) are gradually discharged from the filter, so that the resistance loss of the fluid passing through the filter is gradually reduced; when the resistance loss reaches the set value B, the differential pressure The signal fed back by the transmitter 14 is transmitted to the control module 13, and the control module 13 issues an instruction to close the pneumatic or electric blowdown valve 12 after judgment, so as to realize automatic blowdown.

When the pneumatic or electric blowdown valve 12 breaks down and needs to be repaired or replaced, the isolation valve 11 before blowdown can be temporarily closed to ensure the continuous operation of the system. After the maintenance or replacement is completed, the isolation valve 11 before blowdown is opened in time to restore the normal working condition.

When it is necessary to open the filter for internal maintenance, first remove the bolts between the filter cover 2 and the filter cylinder 6, then tighten the suspension nuts on the vertical suspension device 4, and rotate the filter cover 2 to the filter side of the unit for internal access. After the overhaul is over, turn the filter cover 2 back to the installation position, loosen the suspension nut until it completely freely falls on the upper port of the filter cylinder 6, and then install the connecting fasteners between the two to complete the entire internal overhaul process.

Claims (6)

1. A self-draining basket type pipeline filter, comprising a filter cylinder with an inlet nozzle and an outlet nozzle on the side and a filter cover on the upper end, a bottomless filter basket is arranged in the filter cylinder; the filter cylinder It is also connected with a bottom sewage pipeline; the feature is that: the outlet end of the bottom sewage pipeline is connected with an isolation valve before sewage discharge; the outlet end of the isolation valve before sewage discharge is connected with a pneumatic or electric sewage valve. 2. The self-draining basket type pipeline filter according to claim 1, characterized in that: a filter basket mounting flange is fixedly installed on the inner wall of the filter cylinder, and a filter basket limiter is installed at the inner bottom of the filter cylinder. Position card slot, the bottom of the bottomless filter basket is stuck in the limit card of the filter basket, and the upper end is fixed with the filter basket mounting flange. 3. The self-drainage basket pipeline filter according to claim 1, characterized in that: the self-drainage basket pipeline filter also includes a valve connected with the pneumatic or electric sewage valve and used to control the pneumatic or electric sewage valve. A control module for opening and closing the electric blowdown valve; the control module is connected with a differential pressure transmitter for real-time detection of the fluid pressure difference entering and exiting the filter cylinder. 4. The self-draining basket type pipeline filter according to claim 3, characterized in that: the positive and negative pressure measuring points of the differential pressure transmitter are respectively located on the fluid inlet side and the fluid outlet side of the filter cylinder. 5. The self-draining basket type pipeline filter according to claim 1, characterized in that: the bottom inner wall of the filter cylinder is semicircular or semielliptical. 6. The self-draining basket type pipeline filter according to claim 1, characterized in that: the filter cover is provided with an exhaust port and a vertical suspension device.