CN216590205U

CN216590205U - Novel pneumatic three-way valve

Info

Publication number: CN216590205U
Application number: CN202122788482.XU
Authority: CN
Inventors: 吕宏霞; 孙超
Original assignee: Doright Co ltd
Current assignee: Doright Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-05-24
Anticipated expiration: 2031-11-15

Abstract

The utility model discloses a novel pneumatic three-way valve, which comprises: the device comprises a cylinder 1, a coupler 2, a connecting rod 3, a cylinder frame 4, a guide seat 5, a valve rod 6, a rib plate 7, a valve rod seat 8, a gland 9, an upper sealing ring 10, an upper valve seat 11, a valve core 12, a valve body 13, a lower valve seat 14, a lower sealing ring 15 and a bent pipe 16; the method is characterized in that: the upper part of the connecting rod 3 is connected with a piston rod of the cylinder 1, and the lower part of the connecting rod is welded with the valve rod 6 to form a lifting connecting rod structure; the valve rod 6 is made of a steel pipe with strong rigidity; the valve rod 6 is welded on the valve rod seat 8; the valve rod seat 8 and the valve core 12 are matched and positioned by adopting a straight port and then are connected by a bolt; two linear seals are adopted between the valve core 12 and the upper sealing ring 10 and the lower sealing ring 15; the upper sealing ring 10 and the lower sealing ring 15 are in linear contact with the valve core 12 by adopting inclined planes. Effectively solves the problems of untight sealing of the three-way valve, leakage and carbon deposit, convenient inspection and maintenance of the inner sealing surface of the three-way valve and reduction of the emission of harmful gases.

Description

Novel pneumatic three-way valve

Technical Field

The utility model relates to a pneumatic three-way valve (hereinafter referred to as three-way valve) for a pipeline in the carbon black industry.

Background

For many years, a pipeline three-way valve for the carbon black field is located between indirect heating equipment and the bag filter tail gas circulation pipeline, and during normal work, the tail gas that comes out from indirect heating equipment gets into the bag filter and filters out the likepowder carbon black and collect the feed bin, and the tail gas after filtering discharges again, and the drain is upwards closed to the three-way valve case this moment, and the pipeline between indirect heating equipment and the bag filter is the open mode. When the vehicle is stopped for maintenance or the filter bag is replaced, the tail gas between the heat exchange equipment and the bag filter needs to be closed, and the valve core of the three-way valve is in a downward closed state. The valve core is the key part of the three-way valve, whether the valve core is opened and closed flexibly or not, and whether the sealing meets the design requirements or not is an important measurement index of the three-way valve. The original three-way valve lifting valve rod is hinged with the valve core in a spherical mode, stress points are concentrated on the central point of the valve core, single-channel linear sealing is adopted for sealing, the valve core slightly deflects in the lifting or descending process and generates gaps with the upper sealing ring and the lower sealing ring to cause leakage, and the problems of three-way valve leakage and carbon deposit exist in actual production all the time. Therefore, the valve has the advantages that the rigidity is strong, the stress points of the valve core are distributed in a range, the valve core and the upper and lower sealing rings are in linear sealing, and the problems of untight sealing, leakage and the like of the three-way valve are effectively solved.

Disclosure of Invention

The utility model aims to design a novel pneumatic three-way valve, which adopts the technical scheme that:

a novel pneumatic three-way valve comprising: cylinder 1, shaft coupling 2, connecting rod 3, cylinder frame 4, guide holder 5, valve rod 6, gusset 7, valve rod seat 8, gland 9, upper seal ring 10, upper valve seat 11, case 12, valve body 13, lower disk seat 14, lower sealing ring 15, return bend 16, its characterized in that: the upper part of the connecting rod 3 is connected with a piston rod of the cylinder 1, and the lower part of the connecting rod is welded with the valve rod 6 to form a lifting connecting rod structure; the valve rod 6 is a steel pipe with strong rigidity and a long opening; the valve rod (6) is welded on the valve rod seat (8) and is reinforced by the rib plate (7); the valve rod seat 8 and the valve core 12 are matched and positioned by adopting a straight port and then are connected by a bolt; two linear seals are adopted between the valve core 12 and the upper sealing ring 10 and the lower sealing ring 15; the upper sealing ring 10 and the lower sealing ring 15 are in linear contact with the valve core 12 by adopting inclined planes.

The design key points of the utility model are as follows:

1. the rigidity of the valve rod and the perpendicularity of the valve rod and the valve core are enhanced;

2. distributing the valve stem lifting force on the valve core face;

3. the sealing surfaces of the upper valve seat and the lower valve seat are inclined planes;

4. an inspection port is additionally arranged on the valve body;

5. and a connecting flange is added on the emptying bent pipe.

The utility model has the advantages that:

1. the problem that the valve rod of the original three-way valve is concentrated on one point relative to the acting force of the valve core, so that the edge of the valve core is stressed unevenly, deflection is generated, a gap is reserved between the valve core and the sealing ring, and leakage is caused is solved;

2. the sealing surface of the sealing ring is an inclined surface, and carbon is not accumulated;

3. the valve core and the sealing ring adopt double-channel linear sealing, the sealing effect is far greater than that of single-channel sealing, and the leakage amount is almost zero;

4. an emptying port flange is added, the exhausted gas is further treated and then exhausted into the atmosphere, and the atmosphere is not polluted;

5. an inspection port is additionally arranged on the valve body, so that bent pipes, cylinders and the like on the valve body do not need to be disassembled during shutdown maintenance, and carbon deposit, the abrasion condition of the valve core and the sealing ring are observed through the inspection port and cleaned and maintained;

6. the maintenance period is prolonged, the production line downtime is reduced, and the production operation cost is reduced.

Drawings

FIG. 1 is a schematic view of a novel pneumatic three-way valve of the present invention

FIG. 2 is an enlarged view of FIG. 1I

FIG. 3 is an enlarged view of FIG. 1 II

The labels in the figure are: the valve comprises a cylinder 1, a coupler 2, a connecting rod 3, a cylinder frame 4, a guide seat 5, a valve rod 6, a rib plate 7, a valve rod seat 8, a gland 9, an upper sealing ring 10, an upper valve seat 11, a valve core 12, a valve body 13, a lower valve seat 14, a lower sealing ring 15 and a bent pipe 16.

a-flue gas inlet, b-flue gas outlet, c-vent, d-inspection hole

Detailed Description

A novel pneumatic three-way valve comprising:

the valve comprises a cylinder 1, a coupler 2, a connecting rod 3, a cylinder frame 4, a guide seat 5, a valve rod 6, a rib plate 7, a valve rod seat 8, a gland 9, an upper sealing ring 10, an upper valve seat 11, a valve core 12, a valve body 13, a lower valve seat 14, a lower sealing ring 15 and a bent pipe 16.

The specific implementation process comprises the following steps:

1. machining: processing a connecting rod 3, a cylinder frame 4, a fastening sleeve and a sealing box in a guide seat 5, a valve rod 6, a valve rod seat 8, a gland 9, an upper sealing ring 10, an upper valve seat 11, a valve core 12, a lower valve seat 14, a lower sealing ring 15, an inlet/outlet, a connecting flange and an inspection port flange cover according to the drawing;

2. riveting: blanking according to the drawing to manufacture the valve rod 6, the rib plate 7, the valve body 13, the bent pipe 16 and each flange connecting pipe;

3. outsourcing: cylinder 1 and standard parts;

4. assembling and welding the components: assembling and welding each inlet and outlet flange with the connecting pipe; a connecting pipe of the smoke outlet b and a connecting pipe of the inspection port d are welded with the valve body in an assembling way; the upper valve seat 11 and the lower valve seat 14 are assembled and welded with the valve body 13; a connecting pipe of a flue gas inlet a is welded on the lower valve seat 14; after the flange of the vent hole c is assembled and welded with the bent pipe 16, the flange is assembled and welded with the gland 9 and the rib plate 7; the connecting rod 3 is welded with the valve rod 6 through a connecting ring; a sealing box in the guide seat 5 is welded with the bent pipe 16; the cylinder frame 4 is welded on the elbow pipe 16;

5. assembling: assembling the machined and assembled and welded parts, and 1) connecting the valve rod seat 8 and the valve core 12 by bolts and nuts; 2) the connecting rod 3 is inserted into the valve body 13 after penetrating into the guide seat 5; 3) the bent pipe 16 assembly is arranged on the upper valve seat 11 and is fastened by bolts after being adjusted; 4) a flange cover for installing an inspection hole d; 5) packing is arranged in a sealing box of the guide seat 5 and is tightly pressed by a fastening sleeve; 6) the connecting rod 3 is connected with the cylinder 1 by a shaft coupling 2; 7) the electromagnetic valve of the cylinder 1 is arranged on the cylinder frame 4;

6. and (3) inspection and pressure testing: 1) the air cylinder 1 is ventilated to check the flexibility of up and down operation without blockage; 2) the valve core 12 is dropped to the position of the lower valve seat 14 and then is lifted to the position of the upper valve seat 11, and a clearance is checked by a feeler gauge; 3) the stroke of the valve core 12 can meet the technical requirements; 4) lifting the valve core 12 to the upper sealing ring 10, sealing the flue gas inlet a and the flue gas outlet b by using a tool, and performing a pressure test by using a reserved pressurizing port according to design requirements, wherein the pressure is maintained for at least 30 minutes without leakage;

7. and after the inspection is qualified, spraying paint, packaging and delivering goods.

Claims

1. A novel pneumatic three-way valve comprising: cylinder (1), shaft coupling (2), connecting rod (3), cylinder frame (4), guide holder (5), valve rod (6), gusset (7), valve rod seat (8), gland (9), last sealing ring (10), go up valve seat (11), case (12), valve body (13), lower disk seat (14), lower sealing ring (15), return bend (16), its characterized in that: the upper part of the connecting rod (3) is connected with a piston rod of the cylinder (1), and the lower part of the connecting rod is welded with the valve rod (6) to form a lifting connecting rod structure; the valve rod (6) is a steel pipe with strong rigidity and a long opening; the valve rod (6) is welded on the valve rod seat (8) and is reinforced by the rib plate (7); the valve rod seat (8) and the valve core (12) are matched and positioned by adopting a straight port and then are connected by bolts; two linear seals are adopted between the valve core (12) and the upper sealing ring (10) and the lower sealing ring (15); the upper sealing ring (10) and the lower sealing ring (15) are in linear contact with the valve core (12) by adopting inclined planes.

2. A novel pneumatic three-way valve according to claim 1, wherein: the upper part of the connecting rod (3) is connected with the piston rod of the cylinder (1), namely, the upper part of the connecting rod (3) is connected with the piston rod of the cylinder (1) through the coupler (2), and the lower part of the connecting rod is welded with the valve rod (6) through a connecting ring to form a lifting connecting rod structure.