CN214890446U

CN214890446U - Steam trap

Info

Publication number: CN214890446U
Application number: CN202120954784.7U
Authority: CN
Inventors: 王斌; 刘民; 郭玉栋; 王保军
Original assignee: GANSU HONGFENG MACHINERY CO Ltd
Current assignee: GANSU HONGFENG MACHINERY CO Ltd
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2021-11-26
Anticipated expiration: 2031-05-07

Abstract

The utility model relates to a steam trap, which comprises a valve body (1) and a valve cover (10) arranged on the valve body (1), wherein both sides of the valve body (1) are provided with a water inlet pipeline (16) and a water outlet pipeline (17); outlet conduit (17) pipeline mouth end is linked together with the inside hole of valve body (1), be provided with disk seat heelpiece (2) in the hole, the inside disk seat (6) that is equipped with of cavity that forms between valve body (1) and valve gap (10), guide pillar (8) are established perpendicularly to disk seat (6) up end, bimetallic strip (9) are established to guide pillar (8) side surface fitting with a contraceptive ring cover, disk seat (6) bottom cover is equipped with sealing ring (4), it is provided with case (7) to wear under bimetallic strip (9) upper portion under sealing ring (4) inside in disk seat (6), there is adjusting nut (11) on case (7), the utility model discloses beneficial effect: the automatic drainage of condensed water and non-condensable gas, the prevention of steam leakage, sensible heat energy conservation and the benefit of recycling of the condensed water are realized.

Description

Steam trap

Technical Field

The utility model relates to a trap technical field, concretely relates to steam trap suitable for high-pressure superheated steam pipeline, small-size steam indirect heating equipment hinder vapour drainage and utilize the trap backpressure to retrieve the condensate water automatically at operating pressure difference 0.4 ~ 11.0(MPa) within range.

Background

At present, the known common high-temperature high-pressure bimetal steam trap has extremely small opening when condensed water is discharged, and the pressure difference between the inlet and the outlet of the trap is very large, so that the sealing surface of a valve core and the sealing surface of a valve hole of the trap bear extremely strong erosion force, and the sealing surface of the valve core and the sealing surface of the valve hole are quickly eroded and damaged. And the bimetallic strip is directly used after being punched, and the clearance of a switch valve of the drain valve and the supercooling degree of drainage cannot be accurately adjusted due to the problems of warping, uneven heating and the like of the bimetallic strip.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome general high temperature, high pressure bimetal formula steam trap opening and closing member "erosion" problem and bimetallic strip warpage, the inhomogeneous problem of being heated, provide a high temperature resistant, high pressure and the excellent sealed bimetallic strip formula steam trap that falls of erosion resistance, bimetallic strip adopts original ring step die mould technique to realize that level and level of bimetallic strip and be heated evenly, saved the spacer between the traditional bimetallic group behind the ring step die mould. The steam trap can reliably act within the working pressure difference of less than or equal to 11.0MPa and the maximum allowable temperature of 500 ℃, meets the use requirements of automatically discharging condensed water and non-condensable gas, preventing steam leakage and utilizing sensible heat of the condensed water to save energy by the steam trap, and is favorable for recycling the condensed water.

The utility model relates to a steam trap, which comprises a valve body 1 and a valve cover 10 fixedly connected with the valve body 1 through a hexagon nut 12 and an equal-length stud 13, wherein a winding type sealing gasket 3 for sealing is arranged between the valve body 1 and the valve cover, and both sides of the valve body 1 are respectively provided with a water inlet pipeline 16 and a water outlet pipeline 17; the pipe orifice end of the water outlet pipe 17 is communicated with an inner hole in the valve body 1, a valve seat bottom cushion 2 is arranged in the inner hole, a valve seat 6 is arranged in a cavity formed between the valve body 1 and the valve cover 10, a guide post 8 is vertically embedded in the upper end surface of the valve seat 6, a bimetallic strip 9 is annularly sleeved on the side surface of the guide post 8, a sealing ring 4 is sleeved at the bottom of the valve seat 6, the sealing ring 4 is arranged in an inner hole, a valve core 7 is arranged in the valve seat 6 from the lower part of the sealing ring 4 to the upper part of the bimetallic strip 9, the valve core 7 and the sealing ring 4 are connected in series, an annular two-stage decompression chamber is formed at the discharge port end of the water outlet pipeline 17, the upper end of the valve core 7 is provided with an adjusting nut 11, the internal thread at the end part of the valve core 7 and the external thread of the adjusting nut 11 arranged at the end part are mutually screwed and pressed above the bimetallic strip 9, and a filter screen 5 is arranged between the clearance groove of the valve seat 6 and the two inner parts of the valve cover 10.

And a label 14 is spot-welded on the outer edge of the flange in the middle of the valve cover 10.

The utility model has the advantages that:

the utility model discloses provide a high temperature resistant, high pressure and the excellent bimetallic strip formula steam trap of the erosion resistance of opening and closing member to the user, this bimetallic strip trap reliable operation, stability, the air leakage rate is very little, and energy-conserving effect is showing, is applicable to high-pressure superheated steam pipeline, steam heating branch pipeline and small-size steam indirect heating equipment and chooses for use, and operating differential pressure scope 0.4 ~ 11.0(MPa), the highest allowable temperature 500 ℃. The switch has the outstanding characteristics of extremely strong erosion resistance of the switch, high working reliability in a large working pressure difference range, and the switch has the following characteristics:

a. the valve core and the sealing ring are made of titanium alloy materials, and have excellent high temperature resistance and erosion resistance.

b. The two-stage pressure-reducing reinforcement type drainage structure can drain condensed water in time and has small air leakage rate.

c. The size of the supercooling degree of the discharged condensed water can be adjusted as required to utilize the sensible heat of the condensed water.

d. A square bimetallic strip 9 with a temperature change curve close to the temperature curve of saturated steam is adopted.

e. Sensitive and reliable action, low noise, water hammer resistance and long service life.

f. The bimetallic strip 9 adopts an original circular step type profiling technology, and has good smoothness and uniform heating.

g. Adopts an advanced reverse sealing closing mode and has the function of a check valve.

h. The built-in filter screen 5 effectively filters impurities and reliably protects the drain valve.

i. The appearance is pleasing to the eye, and the weight is lighter, the sexual valence relative altitude.

Drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a top view of fig. 1.

In the figure: the valve comprises a valve body 1, a valve seat bottom pad 2, a wound sealing gasket 3, a sealing ring 4, a filter screen 5, a valve seat 6, a valve core 7, a guide pillar 8, a bimetallic strip 9, a valve cover 10, an adjusting nut 11, a hexagonal nut 12, an equal-length stud 13, a label 14, a water inlet pipeline 16, a water outlet pipeline 17, a valve core spherical surface part A, a sealing ring conical surface opening part B, a pressure chamber C and a valve core lower part maximum outer diameter inclined plane D.

Detailed Description

The invention will be further described with reference to fig. 1-3.

The utility model relates to a steam trap, which comprises a valve body 1 and a valve cover 10 fixedly connected with the valve body 1 through a hexagon nut 12 and an equal-length stud 13, wherein a winding type sealing gasket 3 for sealing is arranged between the valve body 1 and the valve cover, and both sides of the valve body 1 are respectively provided with a water inlet pipeline 16 and a water outlet pipeline 17; the pipeline opening end of the water outlet pipeline 17 is communicated with an inner hole in the valve body 1, a valve seat bottom pad 2 is arranged in the inner hole, a valve seat 6 is arranged in a cavity formed between the valve body 1 and the valve cover 10, two guide pillars 8 are vertically embedded in the upper end surface of the valve seat 6, the requirement is firm and vertical to the upper end surface of the valve seat 6, two surfaces with small expansion coefficients of two bimetallic strips 9 are attached together, two surfaces with large expansion coefficients are outward respectively and are combined into a group, six groups of bimetallic strips 9 are respectively strung into the guide pillars 8, a sealing ring 4 is sleeved at the bottom of the valve seat 6, a valve core 7 penetrates from the lower part of the sealing ring 4 to the upper part of the bimetallic strips 9, and finally an adjusting nut 11 is arranged at the upper end, the rod part of the valve core 7 is screwed with the adjusting nut 11 together, and the maximum gap of the valve is adjusted; the bottom of the valve seat 6 is sleeved with a sealing ring 4, the valve seat 6 penetrates from the sealing ring 4 to the upper part of the bimetallic strip 9, the valve core 7 is arranged on the upper end of the bimetallic strip 7, the valve core 7 and the sealing ring 4 are connected in series, an annular secondary decompression chamber is formed at the end part of a discharge port of the water outlet pipeline 17, an adjusting nut 11 is installed at the upper end of the valve core 7, an internal thread at the end part of the valve core 7 and an external thread of the adjusting nut 11 arranged at the end part are mutually screwed and pressed above the bimetallic strip 9, a filter screen 5 is arranged between two of the empty groove part of the valve seat 6 and the valve cover 10, and the filter screen 5 is a 20-mesh annular filter screen.

The bimetallic strip 9 adopts a circular ring step type profiling technology, the height difference of each annular step is 0.1mm, the surface with large expansion coefficient is convex, and the surface with small expansion coefficient is concave.

The adjusting nut 11 functions as: the size of the gap of the switch valve is adjusted, namely the drainage supercooling degree can be adjusted between 5 ℃ and 20 ℃, the adjusting nut 11 controls the distance between the spherical part A of the valve core and the conical surface of the sealing ring 4 to change the drainage supercooling degree, the bimetallic strip 9 is heated and begins to deform when contacting steam or condensed water, the valve core 7 and the adjusting nut 11 are driven to move upwards, the effective deformation reaches the closed valve position, the drain valve is closed when the thermal thrust generated by the bimetallic strip 9 is greater than the static pressure of a medium acted on the valve core 7 due to the pressure difference between an inlet and an outlet, the spherical part A of the valve core and the conical surface opening part B of the sealing ring are in contact sealing at the moment, the gap between the maximum outer diameter inclined plane D of the lower part of the valve core and the large opening part of the conical surface of the sealing ring 4 is minimum, and a conical annular pressure chamber C is formed between the inner conical hole of the sealing ring 4 and the spherical part A of the valve core and the small inclined plane of the lower part. When the drain valve begins to discharge the condensed water, the condensed water firstly enters the pressure chamber C, the valve core 7 is pushed by the pressure of the condensed water to overcome the thermal thrust of part of the bimetallic strip 9, the opening of the drain valve is rapidly increased, and the condensed water is discharged in a large discharge amount.

The working principle is as follows: the square bimetallic strip 9 is in a straight state at normal temperature, the valve core 7 is away from the sealing ring 4 for a certain distance, the water outlet is in a completely open state, and cold air and low-temperature condensed water in the pipeline can be rapidly discharged. When high-temperature condensed water enters the valve, the bimetallic strip 9 is heated and bent to generate deformation, when the bimetallic strip is deformed to a closed valve position, the bimetallic strip 9 is prevented from deforming by the contact of the sealing surface, the thermal thrust is generated due to continuous rise of temperature, and the thermal thrust is greater than the medium static pressure acted on the valve core 7 by the pressure difference between the inlet and the outlet, so that the drain valve is closed. When the temperature of the condensed water is reduced to the designed valve opening temperature, the degree of bending deformation of the bimetallic strip 9 is reduced, the generated thermal thrust is also reduced, the thermal thrust of the bimetallic strip 9 is smaller than that of the drain valve when the medium static pressure acted on the valve core 7 by the pressure difference between the inlet and the outlet is smaller, and the drain valve is in a state of discharging the condensed water. After the low-temperature condensed water is discharged, the high-temperature condensed water enters again, the drain valve is closed, and the actions are repeated. The drainage supercooling degree of the drain valve is controlled within the range of 5-20 ℃ below the saturated vapor pressure-temperature curve.

Claims

1. A steam trap, characterized by: the drain valve comprises a valve body (1) and a valve cover (10) fixedly connected with the valve body (1) through a hexagon nut (12) and an equal-length stud (13), wherein a wound sealing gasket (3) with a sealing effect is arranged between the valve body and the valve cover, and a water inlet pipeline (16) and a water outlet pipeline (17) are respectively arranged on two sides of the valve body (1); outlet conduit (17) pipeline mouth end and the inside hole of valve body (1) be linked together, be provided with disk seat heelpiece (2) in the hole, valve body (1) and valve gap (10) between the cavity that forms inside be provided with disk seat (6), disk seat (6) up end perpendicular embedding is provided with guide pillar (8), guide pillar (8) side surface fit with a contraceptive ring and be provided with bimetallic strip (9), disk seat (6) bottom cover be equipped with sealing ring (4), penetrate until bimetallic strip (9) upper portion be provided with case (7) under sealing ring (4) in disk seat (6) inside, case (7) and sealing ring (4) establish ties together, form an annular second grade decompression chamber in outlet conduit (17) discharge port end department, case (7) upper end is installed adjusting nut (11), case (7) tip internal thread and adjusting nut (11) external screw thread that the tip set up connect each other soon and press on bimetallic strip (9) the last decompression chamber of valve And a filter screen (5) is arranged between the clearance groove of the valve seat (6) and the two inner valve covers (10).

2. A steam trap as defined in claim 1 wherein: and a label (14) is spot-welded on the outer edge of the flange in the middle of the valve cover (10).