Gas discharge device for negative pressure control environment-friendly sealing strip processing

Abstract

The utility model relates to a negative pressure control environment-friendly gas discharging device for sealing strip machining, and aims to solve the technical problem that the service life of flange connection is shortened due to the fact that the sealing function cannot be achieved once a current sealing ring is corroded and damaged. The device further comprises a secondary sealing structure. The secondary sealing structure comprises a lantern ring, a connecting rod, a circular ring, a spring, an abutting ring and an annular sealing gasket. The lantern ring is sleeved on the connecting flange; the connecting rod penetrates through a through hole formed in the inner side of an annular groove in the inner side of the lantern ring; the inner side of the circular ring is fixedly connected with the outer end of the connecting rod; the spring is sleeved on the connecting rod between the inner side of the circular ring and the outer side of the lantern ring; the inner side of the abutting ring is fixedly connected with the inner end of the connecting rod. The connecting flange has the advantages that a layer of sealing is arranged on the outer ring of the butt joint position of the two connecting flanges, and the service life is prolonged through the two layers of sealing.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas emission, in particular to a gas emission device for processing negative pressure controlled environmental protection type sealing strips. Background Technique

[0002] During the processing of sealing strips, waste gas will be generated. The waste gas contains a lot of harmful substances and needs to be exported for treatment before being discharged.

[0003] Corresponding connecting pipes and negative pressure fans are used to extract waste gas. The negative pressure fan makes the inside of the connecting pipe generate negative pressure, and then the waste gas is extracted from the connecting pipe. The two connecting pipes are connected by flanges, but there is only one sealing ring at the flange docking place. Once the sealing ring is corroded and damaged, the sealing function cannot be realized, resulting in a short service life of the flange connection.

[0004] In view of this, we propose a gas emission device for processing negative pressure controlled environmental protection type sealing strips. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art, meet the actual needs, and provide a gas emission device for processing negative pressure controlled environmental protection type sealing strips, so as to solve the technical problem that once the sealing ring is corroded and damaged, the sealing function cannot be realized, resulting in a short service life of the flange connection.

[0006] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is: designing a gas emission device for processing negative pressure controlled environmental protection type sealing strips, including connecting pipes, and connecting flanges are respectively arranged at opposite ends of the two connecting pipes, and a secondary sealing structure is further included;

[0007] Two secondary sealing structures are respectively sleeved on the two connecting flanges;

[0008] The secondary sealing structure includes a collar, a connecting rod, a circular ring, a spring, a butting ring and an annular sealing gasket;

[0009] The collar is sleeved on the connecting flange;

[0010] Wherein, an annular groove is formed in the inner circle of the inner side of the collar;

[0011] A number of connecting rods are annularly arrayed and penetrate through a number of through holes formed in the inner side of the annular groove;

[0012] The inner side of the circular ring is fixedly connected to the outer ends of the number of connecting rods;

[0013] A number of springs are respectively sleeved on the number of connecting rods between the inner side of the circular ring and the outer side of the collar;

[0014] The inner side of the abutting ring is fixedly connected to the inner ends of several of the connecting rods;

[0015] Among them, the abutting ring is movably arranged in the annular groove, the outer peripheral wall of the abutting ring is in contact and cooperation with the inner peripheral wall of the annular groove, and the inner peripheral wall of the abutting ring is in contact and cooperation with the outer peripheral wall of the connecting flange;

[0016] The annular gasket is fixedly arranged on the outer side of the abutting ring.

[0017] Preferably, the inner side of the collar is aligned with the inner side of the connecting flange, and the annular gasket is movably arranged outside the annular groove.

[0018] Preferably, a plurality of annular grooves are spaced apart on the outer side of the annular gasket, a plurality of annular protrusions are spaced apart on the outer side of the annular gasket, and the plurality of annular grooves and the plurality of annular protrusions are alternately arranged in sequence;

[0019] Among them, the plurality of annular grooves and the plurality of annular protrusions on the two annular gaskets are staggered with each other.

[0020] Preferably, the depth of the annular groove is greater than the total thickness of the abutting ring and the annular gasket.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] 1. By arranging the collar, the connecting rods, the circular ring, the spring, the abutting ring and the annular gasket, the present utility model has the advantage of providing a layer of seal on the outer ring at the butt joint of the two connecting flanges, and the two-layer seal improves the service life, solving the problem that once the sealing ring is corroded and damaged, the sealing function cannot be realized, resulting in a short service life of the flange connection.

[0023] 2. By arranging the annular grooves and the annular protrusions, after the two annular gaskets are abutted, the annular grooves and the annular protrusions on the opposite sides of the two annular gaskets are engaged with each other to form a zigzag contact surface, increasing the contact area and further enhancing the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall structural schematic diagram of the present utility model;

[0025] Figure 2 is the cross-sectional schematic diagram of the secondary sealing structure of the present utility model;

[0026] Figure 3 is the Figure 2 enlarged schematic diagram at A of the present utility model;

[0027] Figure 4 is the cross-sectional structural schematic diagram of the collar of the present utility model;

[0028] In the figure: 1, connecting pipe; 2, connecting flange; 3, secondary sealing structure;

[0029] 301, collar; 302, connecting rod; 303, circular ring; 304, spring; 305, abutting ring; 306, annular gasket;

[0030] 3011, annular groove; 3012, perforation;

[0031] 3061, annular clamping groove; 3062, annular protrusion. Specific implementation mode

[0032] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0033] Embodiment 1: A gas discharge device for processing an environmentally friendly sealing strip with negative pressure control, see Figures 1 to 4 , including a connecting pipe 1, connecting flanges 2 are respectively arranged at opposite ends of the two connecting pipes 1, a negative pressure is formed in the inner cavity of the connecting pipe 1 under the action of an external negative pressure fan to suck away waste gas, and further includes a secondary sealing structure 3;

[0034] The two secondary sealing structures 3 are respectively sleeved on the two connecting flanges 2;

[0035] The secondary sealing structure 3 includes a collar 301, a connecting rod 302, a circular ring 303, a spring 304, an abutting ring 305 and an annular gasket 306;

[0036] The collar 301 is sleeved on the connecting flange 2; wherein, an annular groove 3011 is formed in the inner ring of the inner side of the collar 301; a plurality of connecting rods 302 are annularly arrayed and penetrate through a plurality of perforations 3012 formed in the inner side of the annular groove 3011; the inner side of the circular ring 303 is fixedly connected to the outer ends of the plurality of connecting rods 302; a plurality of springs 304 are respectively sleeved on the plurality of connecting rods 302 between the inner side of the circular ring 303 and the outer side of the collar 301; both ends of the spring 304 are fixedly connected to the inner side of the circular ring 303 and the outer side of the collar 301 respectively, and the elastic coefficient of the spring 304 is selected and used by technicians in this field according to actual situations; the inner side of the abutting ring 305 is fixedly connected to the inner ends of the plurality of connecting rods 302; wherein, the abutting ring 305 is movably arranged in the annular groove 3011, the outer peripheral wall of the abutting ring 305 is in contact and cooperation with the inner peripheral wall of the annular groove 3011, and the inner peripheral wall of the abutting ring 305 is in contact and cooperation with the outer peripheral wall of the connecting flange 2; the annular gasket 306 is fixedly arranged on the outer side of the abutting ring 305; the entire movement of the circular ring 303 causes the plurality of abutting rings 305 and the annular gasket 306 to move synchronously.

[0037] The utility model has the advantages of setting a collar 301, a connecting rod 302, a circular ring 303, a spring 304, a contact ring 305 and an annular gasket 306 to provide a layer of seal on the outer ring at the docking part of two connecting flanges 2, and the two-layer seal improves the service life, solving the problem that once the sealing ring is corroded and damaged, the sealing function cannot be realized, resulting in a short service life of the flange connection.

[0038] Specifically, the inner side of the collar 301 is aligned with the inner side of the connecting flange 2, and the annular gasket 306 is movably arranged outside the annular groove 3011; after the two connecting flanges 2 are docked, the two collars 301 are docked and fitted, and the two annular gaskets 306 are docked and squeezed into the annular groove 3011, and the rebounding force of the spring 304 makes the two annular gaskets 306 abut against each other to strengthen the seal.

[0039] Furthermore, a plurality of annular grooves 3061 are spaced apart on the outer side of the annular gasket 306, and a plurality of annular protrusions 3062 are spaced apart on the outer side of the annular gasket 306, and the plurality of annular grooves 3061 and the plurality of annular protrusions 3062 are alternately arranged in sequence; the cross-sections of the annular grooves 3061 and the annular protrusions 3062 are both trapezoidal; among them, the plurality of annular grooves 3061 and the plurality of annular protrusions 3062 on the two annular gaskets 306 are staggered with each other.

[0040] The utility model has the advantages of setting the annular grooves 3061 and the annular protrusions 3062 that after the two annular gaskets 306 abut against each other, the annular grooves 3061 and the annular protrusions 3062 on the opposite sides of the two annular gaskets 306 are engaged with each other to form a zigzag contact surface, increasing the contact area and further strengthening the sealing effect.

[0041] Still further, the depth of the annular groove 3011 is greater than the total thickness of the contact ring 305 and the annular gasket 306; the contact ring 305 and the annular gasket 306 can move in the annular groove 3011.

[0042] Working principle: When using the device of the utility model, the connecting flanges 2 at the opposite ends of two connected pipelines 1 are docked, and the two connecting flanges 2 are fixed by bolts and nuts. After the two connecting flanges 2 are docked, the two collars 301 are docked and fitted, and the two annular gaskets 306 are docked and squeezed into the annular groove 3011, the contact ring 305 retracts into the annular groove 3011, the connecting rod 302 is pushed to drive the circular ring 303 to move outward, and the spring 304 is stretched; after the two annular gaskets 306 abut against each other, the annular grooves 3061 and the annular protrusions 3062 on the opposite sides of the two annular gaskets 306 are engaged with each other to form a zigzag contact surface, increasing the contact area and further strengthening the sealing effect.

[0043] The embodiments disclosed in the present utility model are preferred embodiments, but are not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present utility model based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present utility model, they are within the protection scope of the present utility model.

Claims

1. A gas exhaust device for processing a negative pressure controlled environmentally friendly sealing strip, comprising a connecting pipe (1), two connecting pipes (1) are respectively provided with connecting flanges (2) at opposite ends thereof, characterized in that: Also includes: Two secondary sealing structures (3) are respectively sleeved on the two connecting flanges (2); The secondary sealing structure (3) comprises: A collar (301) sleeved on the connecting flange (2); Wherein, an annular groove (3011) is provided on the inner ring of the sleeve (301); A plurality of connecting rods (302) are arranged in an annular array and penetrated into a plurality of through holes (3012) provided on the inner side of the annular groove (3011); A circular ring (303), the inner side of which is fixedly connected to the outer ends of the plurality of connecting rods (302); A plurality of springs (304) are respectively sleeved on a plurality of connecting rods (302) between the inner side of the circular ring (303) and the outer side of the sleeve ring (301); An abutment ring (305), the inner side of which is fixedly connected to the inner ends of the plurality of connecting rods (302); The abutment ring (305) is movably arranged in the annular groove (3011), the outer ring wall of the abutment ring (305) is in contact with the inner ring wall of the annular groove (3011), and the inner ring wall of the abutment ring (305) is in contact with the outer ring wall of the connecting flange (2); An annular sealing gasket (306) is fixedly arranged on the outer side of the abutting ring (305).

2. A gas exhaust device for processing a negative pressure controlled environmentally friendly sealing strip as claimed in claim 1, characterized in that: The inner side of the collar (301) is aligned with the inner side of the connecting flange (2), and the annular sealing gasket (306) is movably arranged outside the annular groove (3011).

3. A gas exhaust device for processing a negative pressure controlled environmentally friendly sealing strip as claimed in claim 1, characterized in that: A plurality of annular grooves (3061) are arranged at intervals on the outer side of the annular sealing gasket (306), and a plurality of annular protrusions (3062) are arranged at intervals on the outer side of the annular sealing gasket (306), and the plurality of annular grooves (3061) and the plurality of annular protrusions (3062) are arranged alternately in sequence; The plurality of annular grooves (3061) and the plurality of annular protrusions (3062) on the two annular sealing gaskets (306) are staggered with each other.

4. A gas exhaust device for processing a negative pressure controlled environmentally friendly sealing strip as claimed in claim 1, characterized in that: The depth of the annular groove (3011) is greater than the total thickness of the abutment ring (305) and the annular sealing gasket (306).

Images