CN216868158U - Disc type air trap - Google Patents

Abstract

The utility model relates to a disc type air drain valve, which particularly comprises a valve body (1) and a valve cover (7) which is arranged on the valve body (1) and is fixedly connected with the valve body through a hexagon head bolt (8) and a spring washer (9), wherein a valve seat sleeve (4) is arranged at the pipeline opening of the hollow part in the middle of the valve body (1), a valve seat (3) which is mutually nested with a valve seat sleeve (4), an inner valve cover (6) which forms a pressure-variable cavity space with the valve seat (3) is fixedly sealed at a structure part which is arranged with a concave edge of the valve seat (3) through a valve cover sealing gasket (12), a valve block (5) which can move up and down and realizes the opening and closing of the whole drain valve is arranged on the surface of a convex structure which is arranged in a hollow way at the middle part of the valve seat (3), two sides which are symmetrical along the central axis of the valve block (5) are provided with unlocking exhaust grooves, the valve cover (7) is fixedly provided with an unlocking valve component (10), and the utility model has the beneficial effects that: the unique air unlocking device design discharges the dead body in the pressure changing chamber, and ensures the normal operation of the drain valve.

Description

Disc type air trap

Technical Field

The utility model relates to the technical field of air drain valves, in particular to a disc type air drain valve which can meet the requirements of automatic drainage and air blocking of a gas drain pipeline, can recover condensed water by utilizing the back pressure of the drain valve and is suitable for the drainage working condition of the condensed water.

Background

China is the second largest energy producing country and consuming country in the world, and energy conservation and emission reduction are important national policies. The disc type air drain valve is used as an energy-saving and environment-friendly valve and has wide usability. For different working conditions, different forms of steam traps are selected. At present, the existing disc type drain valve is mainly used for steam equipment and pipelines and is widely applied, but when the inert gas conveying equipment or pipelines need to drain water, corresponding disc type air drain valve products do not exist, the air equipment or pipelines are mainly used in equipment occasions such as electric valves, instrument control and the like, if the water content is too large, the use of the equipment is influenced, and the equipment can be seriously damaged. Therefore, the development of the disc type air trap is very important. The existing disc type air drain valve is not provided with a spent body discharging device, so that gas in the valve body is accumulated, water flow cannot be normally discharged, and the working operation progress of the whole valve body is influenced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: 1) the technical parameters that the nominal pressure is 2.5MPa and the discharge capacity reaches 900 kg/h under the working pressure difference of 1.6Mpa G are realized; 2) the air lock problem of the disc type air trap during working is solved; 3) the split design of the valve seat and the valve body greatly reduces the leakage problem caused by sealing failure caused by aging deformation; 4) the cavity structure and the flow passage design ensure that the air drain valve has a non-return function, and the valve is automatically closed when the back pressure is higher than the pressure at the front end, so that the front-end equipment and pipelines are protected;

5) the valve plate adopts a unique unlocking streamline design, so that the air lock problem caused by the fact that air enters the transformation chamber too fast is prevented; 6) the valve plate is made of metal ceramics, so that the wear resistance and the erosion resistance are greatly improved, and the service life of the valve is prolonged; 7) the unique design of the air unlocking device discharges the exhaust body which does not do work in the pressure changing chamber, thereby ensuring the normal operation of the drain valve.

The utility model comprises a drain valve comprising a valve body 1 and a valve cover 7 which is arranged on the valve body 1 and fixedly connected through a hexagon head bolt 8 and a spring washer 9, wherein a valve seat sleeve 4 is arranged at the pipeline opening of the hollow part in the middle of the valve body 1, a valve seat 3 which can allow air and water to pass through and is mutually nested with the valve seat sleeve 4 is arranged in the hollow part in the middle of the cavity space formed by the valve body 1 and the valve cover 7, the valve seat 3 and the valve body 1 are fixed through a pin shaft 2, sealing is realized between the valve seat 3 and the valve body 1 through a sealing gasket, the middle of the valve seat 3 is of a hollow convex structure, the edge is of a concave structure, an inner valve cover 6 which forms a pressure transformation cavity space with the valve seat 3 is fixedly sealed at the concave structure at the edge of the valve seat 3 through a valve cover sealing gasket 12, and sealing is realized between the upper part of the inner valve cover 6 and the valve cover 7 through a sealing gasket, the valve block 5 which can move up and down and realize the opening and closing of the whole trap is arranged on the surface of a hollow raised structure in the middle of the valve seat 3, two sides symmetrical along the axis of the valve block 5 are provided with unlocking exhaust grooves, an unlocking valve component 10 is fixedly arranged on the valve cover 7, the unlocking valve component 10 comprises an unlocking valve seat 10-2 arranged in the middle of the upper surface of the valve cover 7, an unlocking valve core 10-1 is fixedly arranged on the unlocking valve seat 10-2, the end part of an exhaust outlet at one side of the unlocking valve seat 10-2 is communicated with a pressure relief conduit 11, and the other end of the pressure relief conduit 11 is communicated with an outlet pipeline of the valve body 1; the filter screen assembly 14 is connected with the inlet flow passage port of the valve body 1, and the filter screen assembly 14 consists of a filter screen body 14-1 which is arranged in an annular hollow pipe, a filter screen plug 14-3 which is fixedly arranged with the port of the filter screen body 14-1, and a sealing gasket 14-2 which is arranged between the filter screen body and the filter screen plug and plays a role in sealing. The water inlet flange and the water outlet flange 15 are welded with the valve body 1 in a friction welding mode, so that the valve body is attractive and reliable, and the welding is not limited.

The pressure relief catheter 11 is divided into an upper exhaust pipe 10-3 and a lower exhaust pipe 10-5, and the upper exhaust pipe 10-3 and the lower exhaust pipe 10-5 are fixedly connected through a connecting piece 10-4. The connecting piece 10-4 can be a copper movable joint and is matched with a tetrafluoro pad for sealing connection.

The utility model has the beneficial effects that:

the utility model provides a disc type air drain valve which can meet the requirements of automatic water drainage and air blockage of a gas drain pipeline and recovery of condensed water by utilizing the back pressure of the drain valve for a user, is suitable for the working condition that the condensed water is retained due to the fact that the back pressure is larger than primary pressure, prevents gas from overflowing in a self-operated conveying mode, and simultaneously conveys the condensed water of pipeline equipment to a recovery pipeline at the rear end through the self pressure. The disc-shaped air drain valve provides a valve for automatically identifying gas and condensed water for a user, plays a role in blocking and draining water, realizes unattended working conditions, and saves personnel investment.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a front view of the valve plate;

FIG. 5 is a top view of the valve plate;

FIG. 6 is a cross-sectional view of the valve seat;

fig. 7 is a cross-sectional view of the inner valve cover.

Fig. 8 is a cross-sectional view of the valve cover.

Fig. 9 is a cross-sectional view of a screen assembly.

Fig. 10 is a cross-sectional view of the unlatching valve assembly.

FIG. 11 is a schematic view of air and condensed water in a disc-type air trap according to the present invention.

Fig. 12 is a schematic view illustrating the initial operation of the working principle of the present invention.

Fig. 13 is a schematic view of the water inlet valve opening state in the working principle of the present invention.

Fig. 14 is a schematic view of the intake closed state in the principle of operation of the present invention.

In the figure: the valve comprises a valve body 1, a pin shaft 2, a valve seat 3, a valve seat sleeve 4, a valve block 5, an inner valve cover 6, a valve cover 7, a hexagon head bolt 8, a spring washer 9, an unlocking valve component 10, an unlocking valve core 10-1, an unlocking valve seat 10-2, an upper exhaust pipe 10-3, a loose joint 10-4, a lower exhaust pipe 10-5, a pressure relief pipe 11, a valve cover sealing gasket 12, a valve seat sealing gasket 13, a filter screen component 14, a filter screen body 14-1, a red copper pad 14-2, a filter screen plug 14-3, a water outlet flange 15, wherein A is an unlocking exhaust groove, and B is an annular cone groove on the valve block.

Detailed Description

The present invention will be described in further detail below with reference to fig. 1-9.

In fig. 1-9: two sides of the valve body 1 are respectively friction welded with the water inlet flange and the water outlet flange 15; the lower part of the valve body 1 is connected with the filter screen assembly 14 through threads, and the connection part is sealed by a red copper gasket 14-2; the filter screen body 14-1 is formed by adopting two layers of screen meshes and is arranged at the port of an inlet flow channel of the valve body 1 in a roll welding way and is arranged on a filter screen plug 14-3, the filter screen plug 14-3 is connected with the valve body 1 by threads, and sealing is realized by a red copper gasket; the upper part 1 of the valve body is connected with a valve cover 7 by a hexagon head bolt 8, and a spring pad 9 is added to prevent loosening; the valve body 1 middle part hollow portion's pipeline mouth department be provided with valve seat cover 4, the valve body 1 and the valve gap 7 cavity space inside middle part hollow portion be provided with can supply air and rivers through with the valve seat cover 4 mutual intussusception setting valve seat 3, valve seat 3 and valve body 1 between fixed through round pin axle 2, realize sealed through sealed the pad between the two, the middle part of valve seat 3 is the protruding structure of cavity setting, border department is the structure of recessed setting, valve seat 3 border department is the structure of recessed setting and is fixed sealed through valve gap sealed pad 12 and form the internal valve lid 6 of vary voltage cavity space between valve seat 3, internal valve lid 6 upper portion and valve gap 7 between realize sealed through sealed the pad, the protruding structure surface that the middle part of valve seat 3 is the cavity setting is provided with can reciprocate, realize the valve block 5 that whole trap is opened and close, open along the both sides of axis symmetry in valve block 5 has unblock air discharge duct A, the section of the unlocking exhaust groove A is square, the groove width is 0.1-1 mm, and the groove depth is 0.1-1 mm; unblock air discharge duct A can prevent the emergence of the stifled phenomenon of air in the air trap valve body, place and freely reciprocate in the vary voltage room, characteristic through the inflow outflow medium, make the vary voltage room produce and press and become, and then realize the trap automatic start and stop action, B is the annular vertebra groove on the valve block, the cross-section in annular vertebra groove is triangle-shaped, its effect is the mediation to the medium flow direction, and the lift force when promoting the valve block and opening, very important processing position, the machining precision requirement is higher, the design of this department ensures that the condensate water that is detained in the pipeline discharges smoothly, the trap normally works.

The valve cover 7 is fixedly provided with an unlocking valve assembly 10, the unlocking valve assembly 10 consists of an unlocking valve seat 10-2, an unlocking valve core 10-1, an upper exhaust pipe 10-3, a slipknot 10-4 and a lower exhaust pipe 10-5, the unlocking valve assembly 10 comprises an unlocking valve seat 10-2 arranged in the middle of the upper surface of the valve cover 7, the unlocking valve core 10-1 is fixedly arranged on the unlocking valve seat 10-2, the end part of an exhaust outlet at one side of the unlocking valve seat 10-2 is communicated with a pressure relief conduit 11, the other end of the pressure relief conduit 11 is communicated with an water outlet pipeline of the valve body 1 to ensure the smoothness of an unlocking pipeline, the lower part of the unlocking valve seat 10-2 is connected with the upper part of the valve cover 7 through threads, and the connection part is sealed by a red copper gasket; the upper part 10-2 of the unlocking valve seat is connected with the unlocking valve core 10-1 through threads; an exhaust outlet on the right side of the unlocking valve seat 10-2 is welded with an upper exhaust pipe 10-3, a lower exhaust pipe 10-5 is welded with the right side of the valve body 1, the upper exhaust pipe 10-3 is connected with the lower exhaust pipe 10-5 through a slipknot 10-4, and a polytetrafluoroethylene gasket is arranged in the slipknot 10-4 to realize sealing.

The filter screen assembly 14 consists of a filter screen body 14-1, a filter screen plug 14-3 and a sealing gasket 14-2, wherein the filter screen body is formed by rolling and electric welding two layers of different screens and punching plates; the formed filter screen body 14-1 is arranged on the filter screen plug 14-3 and is matched with the filter screen plug in a small interference manner; the sealing gasket 14-2 is arranged on the filter screen plugs 14-3 and is in transition fit with the filter screen plugs.

The working principle of the utility model is as follows: after the disc type air trap is installed on the pipeline, the operation is automatically started as shown in the schematic diagrams of fig. 11, 12 and 13: in an initial state (see figure 12), the trap is filled with air, and the valve plate 5 falls on the valve seat 3; along with the continuous inflow of the condensed water, the valve plate 5 moves upwards to drain the condensed water to a rear end pipeline, the medium thrust is larger than the pressure of a pressure change chamber closing valve at the moment, the drain valve is in an open drainage state, and meanwhile, the unlocking valve works to discharge the dead steam in the pressure change chamber through the unlocking valve; when the amount of condensed water is reduced and air flows into the valve, the valve closing force of the variable pressure chamber is increased and is greater than the medium thrust, at the moment, the valve plate 5 returns to the seat, the drain valve is closed, and the unlocking valve is closed by means of the flow resistance of the thin pipe; when the condensed water flows into the trap again, the previous actions are repeated, and the operation is repeated.

In summary, the disc-type air trap provided by the utility model can automatically convey condensed water to the pipeline at the lower end by means of medium pressure in the pipeline, and through the structural design of the flow channel, different pressure changes are generated in the pressure changing chamber to identify gas and liquid items, so that the trap can be automatically opened and closed, and the purpose of draining and stopping air is achieved. The unique air unlocking device is designed to lead out dead steam in the pressure changing chamber, so that the drain valve is ensured to work smoothly; the structure design of the flow passage in the valve body prevents liquid from returning, and the non-return function of protecting a front-end pipeline is achieved; due to the design of the split type valve core and valve seat, the leakage problem is reduced; the unique unlocking streamline design of the valve plate 5 discharges the dead steam, and the reliable work of the drain valve is ensured.

Claims (2)

1. The utility model provides a disc type air trap, this trap includes valve body (1) to and set up valve gap (7) through hexagon head bolt (8), spring washer (9) fixed connection on valve body (1), its characterized in that: valve body (1) middle part hollow portion's pipeline mouth department be provided with valve seat cover (4), valve body (1) be provided with the inside middle part hollow portion of cavity space that forms with valve gap (7) and supply air and rivers through valve seat (3) with the mutual intussusception setting of valve seat cover (4), valve seat (3) and valve body (1) between fixed through round pin axle (2), realize sealedly through sealed the pad between the two, the middle part of valve seat (3) is the protruding structure of cavity setting, border department is the structure of recessed setting, valve seat (3) border department is the structure of recessed setting and passes through valve gap sealing pad (12) fixed seal have with valve seat (3) between form the interior valve gap (6) in vary voltage cavity space, interior valve gap (6) upper portion and valve gap (7) between realize sealedly through sealed the pad, the protruding structure surface that the cavity set up is in the middle part of valve seat (3) is provided with can reciprocate, The valve plate (5) for realizing the opening and closing of the whole drain valve is provided with unlocking exhaust grooves along two symmetrical sides of the central axis of the valve plate (5), an unlocking valve component (10) is fixedly arranged on the valve cover (7), the unlocking valve component (10) comprises an unlocking valve seat (10-2) arranged in the middle of the upper surface of the valve cover (7), an unlocking valve core (10-1) is fixedly arranged on the unlocking valve seat (10-2), a pressure relief conduit (11) is communicated with the end part of an exhaust outlet at one side of the unlocking valve seat (10-2), and the other end of the pressure relief conduit (11) is communicated with a water outlet pipeline of the valve body (1); the filter screen assembly (14) is connected with the inlet flow channel port of the valve body (1), and the filter screen assembly (14) consists of a filter screen body (14-1) which is arranged as an annular hollow tube, a filter screen plug (14-3) which is fixedly arranged with the port of the filter screen body (14-1), and a sealing gasket (14-2) which is arranged between the filter screen body and plays a role in sealing.

2. The disc type air trap of claim 1, wherein: the pressure relief catheter (11) is divided into an upper exhaust pipe (10-3) and a lower exhaust pipe (10-5), and the upper exhaust pipe (10-3) and the lower exhaust pipe (10-5) are fixedly connected through a connecting piece (10-4).

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