CN216143548U - Filtering type drain valve - Google Patents

Abstract

The utility model discloses a filtering type drain valve, which is characterized by comprising: the valve comprises a valve body, a valve cover, an inlet pipe, an outlet pipe, a filter screen, a drainage device and an exhaust device; the inlet tube communicates in the inner chamber of valve body, and the junction of inlet tube and valve body is located to the valve gap, and the inlet tube includes: a front filtering section, a screen mounting section and a rear filtering section; the screen cloth installation section is located and is strained between the anterior segment and strain the back end, and filter screen cloth detachably is fixed in the screen cloth installation section, strains the one end opening intercommunication of back end and strain the pore structure on filter screen cloth, strains the other end intercommunication in the inner chamber of valve body of back end. The filter screen is arranged at the front inlet of the drain valve, so that solid impurities in a pipeline can be effectively intercepted, the drain valve is prevented from being blocked, the phenomenon of liquid accumulation is avoided, and the service life of the valve is prolonged; and the filter screen can be dismantled, can in time tear the clearance steam and wrap up and carry impurity, purify steam equipment system, guarantee the hydrophobic volume and the control efficiency of valve, ensure the sealing reliability of valve.

Description

Filtering type drain valve

Technical Field

The utility model relates to the field of valves, in particular to a filtering type drain valve.

Background

The steam trap (for short, trap) is used for automatically discharging non-condensable gases such as steam condensate and air in heating equipment or steam pipelines and preventing leakage of steam. The steam trap has the functions of blocking steam and draining water, so that the steam heating equipment can supply heat uniformly, and latent heat of steam is fully utilized to prevent water hammer in the steam pipeline.

Lever float traps are one type of steam trap. The valve body is internally provided with a floating ball which is connected with a lever to drive the valve clack to move, thereby opening or closing the drain valve. When high-temperature steam enters the valve body through the inlet pipe, the position of the floating ball rises along with the rise of the liquid level, so that the lever is pulled, the lever pulls the valve clack to be opened, and condensed water can be discharged through the bottom outlet pipe. The water discharge valve seat is always below the liquid level to form a water seal, steam cannot be discharged through the water discharge valve, no steam leakage exists, and the energy-saving effect is good.

When the trap needs to be applied to the environment with larger water flow, solid impurities wrapped by water or steam easily cause the trap to be blocked, the drainage speed is reduced due to long service life, the phenomenon of liquid accumulation occurs, and the service life of the trap is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a filtering type steam trap which can effectively solve the problem of filtering solid impurities in the use process of the steam trap.

The utility model is realized by the following technical scheme:

a filtration-type trap comprising: the valve comprises a valve body, a valve cover, an inlet pipe, an outlet pipe, a filter screen, a drainage device for controlling the opening and closing of the outlet pipe and an exhaust device for controlling the gas to enter and exit; the drainage device and the exhaust device are both arranged in the inner cavity of the valve body; the inlet tube communicate in the inner chamber of valve body, the valve gap is located the inlet tube with the junction of valve body, the inlet tube includes: a front filtering section, a screen mounting section and a rear filtering section; the screen cloth installation section is located strain the anterior segment with strain between the back end, filter screen cloth detachably be fixed in the screen cloth installation section, strain the one end opening of back end communicate in filter hole structure on the screen cloth, strain the other end of back end communicate in the inner chamber of valve body.

Further, the screen mounting section is inclined in the horizontal direction relative to the filtering front section, the width of an opening at one end of the filtering rear section is equivalent to the length of the filtering screen, and the edges of the opening are respectively attached to the top and the bottom of the filtering screen.

Furthermore, the screen cloth mounting section for the other end of straining the anterior segment open and to have the change mouth of being convenient for change filter screen cloth, change and install sealing bottom plate on the mouth detachably.

Further, the drain device includes: the floating ball, the lever, the valve clack connecting rod, the valve seat and the valve clack; the valve seat and the valve clack are both positioned below the liquid level of the floating ball; one end of the lever is fixed on the floating ball, and the other end of the lever is pivoted to the valve clack connecting rod; the lever is horizontally arranged relative to the liquid level, and the valve clack connecting rod is vertically arranged; the valve clack is fixed on the valve clack connecting rod, and the valve clack is switched between states of opening and closing the valve seat; the valve seat is communicated with the outlet pipe.

Further, the drainage device further comprises a shaft; the lever and the valve flap link are both pivotally connected to the shaft lever.

Further, the valve flap comprises an upper valve flap and a lower valve flap, and the valve seat comprises an upper valve seat and a lower valve seat; the upper valve clack and the lower valve clack are fixed on the valve clack connecting rod, the upper valve clack is switched between states of opening and closing the upper valve seat, and the lower valve clack is switched between states of opening and closing the lower valve seat.

Further, the drainage device further includes: a gland and a spring; the gland is fixed on the lower valve seat; the upper end of the spring abuts against the upper valve clack, the lower end of the spring abuts against the press cover, and the spring is arranged on the periphery of the valve clack connecting rod.

Further, the drainage device also comprises a drainage tube; one end of the drainage tube is communicated to an inner cavity between the upper valve seat and the lower valve seat, and the other end of the drainage tube is communicated to the outlet pipe.

Further, the exhaust apparatus includes: an exhaust valve seat, an exhaust valve and a thermosensitive element; the exhaust valve seat is communicated with the outlet pipe, the exhaust valve is arranged on the exhaust valve seat, and the thermosensitive element is arranged on the exhaust valve; the expansion or contraction of the thermosensitive element drives the exhaust valve to switch between the open and closed states.

Further, the floating ball is made of stainless steel 316.

Compared with the prior art, the utility model can achieve the following beneficial effects:

(1) the filter screen is arranged at the inlet end of the drain valve, so that solid impurities in a pipeline can be effectively intercepted, the drain valve is prevented from being blocked, the phenomenon of liquid accumulation is avoided, and the service life of the valve is prolonged; (2) the filter screen can be dismantled, can in time tear the clearance steam open and wrap up in the impurity of holding under the arms, purifies the steam plant system, guarantees the hydrophobic volume and the control efficiency of valve, ensures the sealing reliability of valve.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a plan sectional view of the present invention taken along the horizontal direction;

FIG. 3 is a perspective cross-sectional view of the present invention taken in the vertical direction;

FIG. 4 is a plan sectional view of the present invention taken in the vertical direction;

fig. 5 is a plan sectional view showing the valve body, the drain device and the exhaust device in the vertical direction.

In the figure: 10. a valve body; 20. a valve cover; 30. an inlet tube; 31. a front filtering section; 32. a screen mounting section; 33. A post-filtration section; 40. an outlet pipe; 50. filtering the screen; 60. a drainage device; 61. a floating ball; 62. a lever; 63. a valve clack connecting rod; 64. an upper valve seat; 65. a lower valve seat; 66. an upper valve flap; 67. a lower valve clack; 68. a shaft lever; 69. a gland; 610. a spring; 611. a drainage tube; 70. an exhaust device; 71. an exhaust valve seat; 72. An exhaust valve; 73. a thermosensitive element; 80. and sealing the bottom plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The utility model discloses a filtering type drain valve, in particular to a lever 62 floating ball 61 type drain valve. Referring to fig. 1-4, the present invention includes: the valve comprises a valve body 10, a valve cover 20, an inlet pipe 30, an outlet pipe 40, a filter screen 50, a water discharging device 60 for controlling the opening and closing of the outlet pipe 40 and an air discharging device 70 for controlling the inlet and outlet of air. Wherein, the drainage device 60 and the exhaust device 70 are both arranged in the inner cavity of the valve body 10.

Referring to fig. 2, the inlet pipe 30 is connected to the inner cavity of the valve body 10, and the valve cover 20 is disposed at the connection position of the inlet pipe 30 and the valve body 10. The inlet pipe 30 in turn comprises: a front filter section 31, a screen mounting section 32, and a rear filter section 33; the screen cloth installation section 32 is arranged between the filter front section 31 and the filter rear section 33, the filter screen cloth 50 is detachably fixed in the screen cloth installation section 32, one end opening of the filter rear section 33 is communicated with a filter hole structure on the filter screen cloth 50, and the other end of the filter rear section 33 is communicated with an inner cavity of the valve body 10. High temperature steam enters into the trap after, through straining anterior segment 31, enters into screen cloth installation section 32, and filter screen 50 plays the filtering action to high temperature steam, wraps up the solid impurity separation of holding with high temperature steam in the screen cloth, and pure steam enters into through straining the hole and strains back end 33, enters into the valve body 10 inner chamber at last.

The filter screen 50 is arranged at the front inlet of the drain valve, so that solid impurities in a pipeline can be effectively intercepted, the drain valve is prevented from being blocked, the phenomenon of liquid accumulation is avoided, and the service life of the valve is prolonged; moreover, the filtering screen 50 can be detached, so that impurities wrapped by steam can be detached and cleaned in time, a steam equipment system is purified, the water drainage and control efficiency of the valve are ensured, and the sealing reliability of the valve is ensured.

The filter screen 50 also has a particular mounting location. The screen mounting section 32 is inclined relative to the filter front section 31 in the horizontal direction, as shown in fig. 2, the screen mounting section 32 and the filter front section 31 are inclined at an angle of approximately 45 °, and this arrangement makes reasonable use of space, so that the trap can be provided with a filter device without blind increase of the length and width of the trap (as shown in fig. 2, the side of the trap is basically of a flange structure, and therefore the inclined arrangement of the filter screen 50 makes reasonable use of the gap between the flanges of the two sides). The one end opening width of the post-filter stage 33 corresponds to the length of the filter screen 50, and the opening edges respectively fit the top and bottom of the filter screen 50. Thus, the opening of the post-filter section 33 "wraps" the side of the entire filter screen 50, ensuring that all steam entering the post-filter section 33 undergoes filtration, and at the same time ensuring maximum ventilation and hydrophobic capacity.

In order to facilitate the detachment and installation of the filtering screen 50, the screen installation section 32 is further provided with a replacement port at the other end of the filtering front section 31, and a sealing bottom plate 80 is detachably installed at the replacement port. By removing or installing the seal plate 80, the filter screen 50 can be removed from or placed into the screen mounting section 32.

The structure and principle of the drain 60 and the vent 70 will be described in detail below.

The drainage device 60 is used to control the open/close state of the outlet pipe 40, thereby controlling the drainage of the condensed water. Referring to fig. 3 to 5, the drainage device 60 is embodied in a lever float type structure, and includes: float 61, lever 62, flap link 63, valve seat and flap. The valve seat and the valve clack are both positioned below the liquid level of the floating ball 61; one end of the lever 62 is fixed on the floating ball 61, and the other end is pivoted with the valve clack connecting rod 63; the lever 62 is horizontally arranged relative to the liquid level, and the valve clack connecting rod 63 is vertically arranged; the valve clack is fixed on the valve clack connecting rod 63, and the valve clack is switched between states of opening and closing the valve seat, specifically, when the valve clack tightly closes the valve seat, the valve seat is in a closed state, and when the valve clack is separated from the valve seat, the valve seat is in an open state. The valve seat communicates with an outlet tube 40. The drain 60 further includes a shaft 68, the shaft 68 acting as an intermediate connector, and the lever 62 and the flap link 63 are both pivotally connected to the shaft 68.

To achieve greater drainage, the drain 60 employs a double seat construction. The valve clack comprises an upper valve clack 66 and a lower valve clack 67, and the valve seat comprises an upper valve seat 64 and a lower valve seat 65; the upper valve flap 66 and the lower valve flap 67 are fixed to the valve flap link 63, and the upper valve flap 66 is switched between states of opening and closing the upper valve seat 64, and the lower valve flap 67 is switched between states of opening and closing the lower valve seat 65.

In order to ensure that the lever 62 is automatically reset after the liquid level drops, the drain 60 further comprises a gland 69 and a spring 610. The gland 69 is fixed on the lower valve seat 65; the upper end of the spring 610 abuts against the upper valve flap 66, the lower end abuts against the gland 69, and the spring 610 is disposed on the outer periphery of the valve flap link 63.

The drainage device 60 further includes a drainage tube 611 to drain the condensed water in the valve seat to the outlet tube 40 when the valve seat is opened. One end of the draft tube 611 communicates with the inner chamber between the upper valve seat 64 and the lower valve seat 65, and the other end communicates with the outlet tube 40.

The exhaust device 70 is used for exhausting the original air in the valve and simultaneously ensuring that the high-temperature steam does not leak. Referring to fig. 3-5, the exhaust device 70 includes an exhaust valve seat 71, an exhaust valve 72, and a heat sensitive element 73; the exhaust valve 72 is communicated with the outlet pipe 40, the exhaust valve 72 is arranged on the exhaust valve seat 71, and the thermosensitive element 73 is arranged on the exhaust valve 72; the heat sensitive element 73 has the characteristics of thermal expansion and contraction when being cooled, and drives the exhaust valve 72 to close or separate from the exhaust valve seat 71 through expansion or contraction, so that the effect of controlling the opening and closing of the exhaust device 70 is achieved.

When the trap is just activated: high-temperature steam does not enter the valve, the interior of the valve body 10 is cold, the thermosensitive element 73 is in a contraction state, the exhaust valve 72 is opened, and the original residual gas in the valve body 10 is exhausted;

when high-temperature steam just enters the valve: filtered pure high-temperature steam enters the valve and is condensed into water, and the liquid level in the valve body 10 continuously rises to drive the floating ball 61 to rise. The float 61 drives the lever 62 to move, so that the valve clack connecting rod 63 is pulled to move in the valve seat, the upper valve clack 66 is separated from the upper valve seat 64, meanwhile, the lower valve clack 67 is separated from the lower valve seat 65, the valve seat is in an open state, and condensed water flows out of the valve seat, flows to the outlet pipe 40 through the drainage pipe 611 and is finally discharged. After the condensed water is discharged, the liquid level drops again, so that the position of the floating ball 61 drops, and the lever 62 drives the valve clack connecting rod 63 to move reversely under the reset action of the spring 610, so that the upper valve clack 66 and the lower valve clack 67 close the upper valve seat 64 and the lower valve seat 65 again respectively, and the circulation is performed.

After the high-temperature steam continuously enters the valve for a period of time: the drainage device 60 is circulated normally in the above manner, and at this time, the temperature of the inner cavity of the valve body 10 rises, and when the temperature reaches the threshold value of the heat sensitive element 73, the heat sensitive element 73 is heated and expanded, and the exhaust valve 72 is driven to close, so that the high-temperature steam cannot leak. Meanwhile, the water discharge valve seat is always below the liquid level to form a water seal, high-temperature steam cannot be discharged through the water discharge valve, steam leakage does not exist, and the energy-saving effect is good.

In order to ensure the buoyancy, corrosion resistance and abrasion resistance of the float ball 61, the stainless steel 316 is preferably used.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. A filtration-type trap, comprising: the valve comprises a valve body, a valve cover, an inlet pipe, an outlet pipe, a filter screen, a drainage device for controlling the opening and closing of the outlet pipe and an exhaust device for controlling the gas to enter and exit;

the drainage device and the exhaust device are both arranged in the inner cavity of the valve body;

the inlet tube communicate in the inner chamber of valve body, the valve gap is located the inlet tube with the junction of valve body, the inlet tube includes: a front filtering section, a screen mounting section and a rear filtering section; the screen cloth installation section is located strain the anterior segment with strain between the back end, filter screen cloth detachably be fixed in the screen cloth installation section, strain the one end opening of back end communicate in filter hole structure on the screen cloth, strain the other end of back end communicate in the inner chamber of valve body.

2. The filtration trap of claim 1, wherein the screen mounting section is inclined in a horizontal direction with respect to the front filter section, the rear filter section has an opening width at one end corresponding to the length of the filter screen, and edges of the opening respectively abut the top and bottom of the filter screen.

3. The filtration trap of claim 2, wherein the screen mounting section has a replacement port at an opposite end of the filter front section for facilitating replacement of the filter screen, the replacement port having a removable seal base plate mounted thereon.

4. The filtration trap of claim 1, wherein said drain comprises: the floating ball, the lever, the valve clack connecting rod, the valve seat and the valve clack; the valve seat and the valve clack are both positioned below the liquid level of the floating ball; one end of the lever is fixed on the floating ball, and the other end of the lever is pivoted to the valve clack connecting rod; the lever is horizontally arranged relative to the liquid level, and the valve clack connecting rod is vertically arranged; the valve clack is fixed on the valve clack connecting rod, and the valve clack is switched between states of opening and closing the valve seat; the valve seat is communicated with the outlet pipe.

5. The filtration trap of claim 4, wherein the drain further comprises a shaft; the lever and the valve flap link are both pivotally connected to the shaft lever.

6. The filtration-type trap of claim 4, wherein the flap comprises an upper flap and a lower flap, and the valve seat comprises an upper valve seat and a lower valve seat; the upper valve clack and the lower valve clack are fixed on the valve clack connecting rod, the upper valve clack is switched between states of opening and closing the upper valve seat, and the lower valve clack is switched between states of opening and closing the lower valve seat.

7. The filtration trap of claim 6, wherein said drain device further comprises: a gland and a spring; the gland is fixed on the lower valve seat; the upper end of the spring abuts against the upper valve clack, the lower end of the spring abuts against the press cover, and the spring is arranged on the periphery of the valve clack connecting rod.

8. The filtration trap of claim 6, wherein said drain device further comprises a draft tube; one end of the drainage tube is communicated to an inner cavity between the upper valve seat and the lower valve seat, and the other end of the drainage tube is communicated to the outlet pipe.

9. The filter trap of claim 1, wherein the venting means comprises: an exhaust valve seat, an exhaust valve and a thermosensitive element; the exhaust valve seat is communicated with the outlet pipe, the exhaust valve is arranged on the exhaust valve seat, and the thermosensitive element is arranged on the exhaust valve; the expansion or contraction of the thermosensitive element drives the exhaust valve to switch between the open and closed states.

10. The filtration trap of claim 4, wherein said float ball is stainless steel 316.

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