Fast-acting steam line drain valve

Abstract

The present invention discloses a quick-response steam pipe drain valve, which relates to the technical field of steam drain valves. The present invention aims to solve the problem of slow response speed of existing drain valves. The present invention comprises a valve cover, the valve cover is connected to a valve body, two ends of the valve body are respectively provided with a water inlet and a water outlet, a filter is provided in the water inlet, a temperature-sensitive valve core is provided in the valve cover, the temperature-sensitive valve core is fixedly connected to the valve body, a water inlet chamber and a water outlet chamber are provided in the valve body, one end of the water inlet chamber is connected to the water inlet, and the other end of the water inlet chamber is connected to the valve cover through the temperature-sensitive valve core; the two ends of the water outlet chamber are respectively connected to the valve cover and the water outlet; the temperature-sensitive valve core is arranged below the water outlet chamber.

Description

Technical Field

[0001] The invention relates to the technical field of steam drain valves, and in particular to a quick-response steam pipeline drain valve. Background Art

[0002] A drain valve is a valve that can automatically discharge condensed water and prevent steam leakage. It is usually located at the lowest point of the pipeline.

[0003] At present, thermostatic drain valves are widely used in steam trap systems. They can timely discharge air and other non-condensable gases, effectively prevent equipment corrosion, extend equipment life, and avoid reduced operating efficiency of steam-applicable equipment and water hammer in pipelines.

[0004] Thermostatic drain valves rely on the deformation or expansion of the temperature sensing element bellows to drive the opening and closing of the valve core, thereby automatically discharging condensed water, air and other non-condensable gases and preventing steam leakage. At the same time, thermostatic drain valves have the advantages of simple structure, easy maintenance, no restrictions on medium temperature, long service life, ability to discharge condensed water below saturation temperature, no steam leakage, etc., and are widely used in power, petroleum, chemical, steel and other industries. However, this type of valve currently has the following problems that need to be solved: First, the pipeline before the drain valve requires a non-insulated condensation section; Second: the valve seat hole is the water inlet hole, the temperature control device is completely immersed in the condensed water with a higher temperature, the drain valve has a slow response speed, and there is a problem of untimely drainage. Summary of the invention

[0005] In order to solve the above problem, that is, the problem of slow response speed of existing drain valves, the present invention proposes a fast-response steam pipe drain valve, which includes a valve cover, a valve body is connected to the valve cover, and two ends of the valve body are respectively provided with a water inlet and a water outlet, a filter is provided in the water inlet, and a temperature-sensitive valve core is provided in the valve cover, and the temperature-sensitive valve core is fixedly connected to the valve body, and a water inlet chamber and a water outlet chamber are provided in the valve body, one end of the water inlet chamber is connected to the water inlet, and the other end of the water inlet chamber is connected to the valve cover through the temperature-sensitive valve core; the two ends of the water outlet chamber are respectively connected to the valve cover and the water outlet; the temperature-sensitive valve core is arranged below the water outlet chamber so that the temperature-sensitive valve core is immersed in cooling water.

[0006] The present invention is further configured as follows: the temperature-sensing valve core includes a sleeve arranged in the valve cover, one end of the sleeve is fixedly connected to the valve body, the other end of the sleeve is threadedly connected to a valve seat, a drain hole is opened on the valve seat, a bellows is sleeved in the sleeve, a valve flap is arranged at one end of the bellows close to the valve seat, the valve flap is arranged corresponding to the drain hole, a spring is arranged between the valve flap and the valve seat, and the two ends of the spring are respectively against the valve flap and the valve seat.

[0007] The present invention is further configured as follows: a flange is provided at one end of the bellows away from the valve disc, the flange is connected to a side surface of the valve body away from the valve cover, a positioning tube is further connected to the flange, the positioning tube is sleeved on the bellows, the end of the positioning tube away from the flange is abutted against the valve seat, and a water permeable hole is opened on the positioning tube.

[0008] The present invention is further configured as follows: an adjusting member for adjusting the bellows is provided on the flange, and a protective cap is provided on the adjusting member.

[0009] The present invention is further configured as follows: the filter comprises a filter chamber, the filter chamber is arranged at a certain angle to the water inlet, the water inlet is connected to the water inlet chamber through the filter chamber, and a stainless steel filter screen is arranged in the filter chamber.

[0010] The present invention is further configured as follows: a screw plug is threadedly connected to one end of the filter chamber away from the water outlet.

[0011] The beneficial effects of the present invention are:

[0012] 1. By setting the temperature-sensing valve core lower than the water outlet cavity, a certain amount of cooling water can be accumulated in the valve cover, and the temperature-sensing valve core can be immersed in the cooling water. The cooling water can quickly cool the temperature-sensing valve core, so that the temperature of the condensed water condensed in the temperature-sensing valve core decreases, and the bellows can respond more quickly to open and discharge the condensed water in the steam pipe. At the same time, it can also save the need to set a condensation section at the front end.

[0013] 2. Through the cooperation of the filter chamber and the screw plug, the stainless steel filter can be quickly disassembled and assembled, and the filter can be further quickly inspected and repaired online. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The schematic diagram of the structure of the present invention is shown.

[0015] Figure 2 A front view of the present invention is shown.

[0016] Figure 3 A partial cross-sectional view of the present invention is shown.

[0017] Figure 4 Shows Figure 3 Schematic diagram of the structure after removing the valve cover, stainless steel filter and temperature-sensing valve core.

[0018] Figure 5 Shows Figure 4 main view.

[0019] Figure 6A schematic diagram of the structure after the valve cover is removed is shown.

[0020] Figure 7 A schematic diagram of the structure of a temperature sensing valve core is shown.

[0021] Figure 8 Shows Figure 7 Partial cross-section Figure 1 .

[0022] Fig. 9 Shows Figure 7 Partial cross-section Figure 2 .

[0023] Fig.10 Shows Figure 7 Schematic diagram of the structure after removing the protective cap.

[0024] Fig.11 An exploded view of the present invention is shown.

[0025] Fig.12 An exploded view of the temperature sensing valve core is shown.

[0026] Figure numerals: 1. Valve cover; 2. Valve body; 21. Water inlet; 22. Water outlet; 23. Water inlet chamber; 24. Water outlet chamber; 3. Filter; 31. Filter chamber; 32. Stainless steel filter; 33. Screw plug; 4. Temperature sensing valve core; 41. Sleeve; 42. Valve seat; 421. Drain hole; 43. Bellows; 44. Valve disc; 45. Spring; 46. Flange; 47. Positioning tube; 471. Water permeable hole; 48. Adjustment piece; 49. Protective cap; 5. Gasket. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0028] refer to Figure 1 , 2 The present invention provides a quick-response steam pipe drain valve, comprising a spherical valve cover 1, an opening of the valve cover 1 being connected to a valve body 2 by bolts, and a water inlet 21 and a water outlet 22 are respectively provided at both ends of the valve body 2.

[0029] refer to Figure 3 A filter 3 is arranged in the water inlet 21 , a temperature-sensitive valve core 4 is arranged in the valve cover 1 , and the temperature-sensitive valve core 4 is connected to the valve body 2 .

[0030] refer to Figure 4 , 5The valve body 2 is provided with a water inlet chamber 23 and a water outlet chamber 24. One end of the water inlet chamber 23 is connected to the water inlet 21, and the other end of the water inlet chamber 23 is connected to the valve cover 1 through the temperature-sensitive valve core 4, thereby realizing the connection between the water inlet 21 and the valve cover 1 through the water inlet chamber 23. The two ends of the water outlet chamber 24 are respectively connected to the valve cover 1 and the water outlet 22, so as to realize the connection between the water outlet 22 and the valve cover 1. The temperature-sensitive valve core 4 is set lower than the water outlet chamber 24, that is, the water inlet of the valve cover 1 is lower than the water outlet. Only when the cooling water level in the valve cover 1 is higher than the water outlet chamber 24, the cooling water will be discharged from the water outlet 22 along the water outlet chamber 24, and when the cooling water level is lower than the water outlet chamber 24, the cooling water will accumulate in the valve cover 1. Because the temperature-sensitive valve core 4 is set lower than the water outlet chamber 24, the temperature-sensitive valve core 4 will be immersed in the cooling water.

[0031] refer to Figure 6 The temperature-sensing valve core 4 includes a sleeve 41, which is arranged in the valve cover 1, and one end of the sleeve 41 is welded to the valve body 2, the sleeve 41 is connected to the water inlet cavity 23, and the end of the sleeve 41 away from the valve body 2 is threadedly connected to the valve seat 42, and a gasket 5 is installed between the valve seat 42 and the sleeve 41. A drain hole 421 is opened at the center of the valve seat 42, and the drain hole 421 is coaxially arranged with the sleeve 41.

[0032] refer to Figure 7 , 9 , 12, a bellows 43 is coaxially sleeved in the sleeve 41, a valve flap 44 is installed at one end of the bellows 43 close to the valve seat 42, the valve flap 44 is set in a cone shape, and its tip is set corresponding to the drain hole 421. A spring 45 is also arranged between the valve flap 44 and the valve seat 42, and the two ends of the spring 45 are respectively against the valve flap 44 and the valve seat 42.

[0033] When the bellows 43 expands due to heat, the bellows 43 can drive the valve flap 44 to move toward the drain hole 421, and the valve flap 44 squeezes the spring 45, and finally abuts against one end of the drain hole 421, thereby blocking the drain hole 421. When the bellows 43 cools and contracts, the bellows 43 can drive the valve flap 44 to move away from the drain hole 421, and the spring 45 relaxes, and the valve flap 44 separates from the drain hole 421, thereby opening the drain hole 421.

[0034] refer to Figure 8 , 1012. A flange 46 is installed at one end of the bellows 43 away from the valve disc 44. The flange 46 is bolted to the surface of the valve body 2 on one side away from the valve cover 1. A positioning tube 47 is welded to the flange 46. The positioning tube 47 is sleeved on the bellows 43, and the bellows 43 is arranged in the sleeve 41. The bellows 43, the positioning tube 47 and the sleeve 41 are coaxially arranged. The end of the positioning tube 47 away from the flange 46 abuts against the valve seat 42. A water-permeable hole 471 is provided on the positioning tube 47 so that the condensed water in the sleeve 41 can directly contact the bellows 43. The positioning tube 47 can limit the movement of the bellows 43 during expansion or contraction, that is, prevent the bellows 43 from radial deformation.

[0035] An adjusting member 48 is threadedly connected on the surface of the flange 46 on the side facing away from the bellows 43. The adjusting member 48 is an adjusting cap with a slot or a cross slot. The adjusting member 48 passes through the flange 46 and is fixedly connected to the bellows 43. Rotating the adjusting member 48 can drive the bellows 43 to move along its axis, thereby adjusting the distance between the valve flap 44 and the drain hole 421. A protective cap 49 is also installed on the flange 46, and the protective cap 49 is covered on the adjusting member 48.

[0036] refer to Figure 3 , 11 The filter 3 includes a filter chamber 31, which is integrated with the valve body 2. The filter chamber 31 is set at a certain angle to the water inlet 21, and the filter chamber 31 is connected with the water inlet 21 and the water inlet chamber 23 respectively, that is, the water inlet 21 is connected with the water inlet chamber 23 through the filter chamber 31. A stainless steel filter 32 is installed in the filter chamber 31. The stainless steel filter 32 is set to be cylindrical and compatible with the filter chamber 31, so that the stainless steel filter 32 is coaxially installed in the filter chamber 31. When condensed water or steam enters from the water inlet 21, it will first be filtered by the stainless steel filter 32 in the filter chamber 31 and then enter the water inlet chamber 23, so as to further filter the condensed water and steam.

[0037] The end of the filter chamber 31 away from the water outlet 22 is threadedly connected to a screw plug 33, and the screw plug 33 abuts against one end of the stainless steel filter screen 32. When the screw plug 33 is unscrewed, the stainless steel filter screen 32 can be removed from the filter chamber 31, thereby achieving cleaning or maintenance of the stainless steel filter screen 32.

[0038] Drainage process: When the steam trap is just started, the non-condensable low-temperature gas will flow into the sleeve 41 from the water inlet 21 along the filter chamber 31 and the water inlet chamber 23. The bellows 43 will shrink when it contacts the low-temperature gas, and the valve flap 44 will separate from the drain hole 421. The drain hole 421 will open, and the low-temperature gas will be discharged into the valve inlet cover 1 and discharged from the water outlet 22 along the water outlet chamber 24.

[0039] When the low-temperature gas is exhausted, the steam will enter the sleeve 41 from the water inlet 21 along the filter chamber 31 and the water inlet chamber 23. The bellows 43 will expand when it contacts the high-temperature steam. The valve flap 44 will abut against the drain hole 421, and the drain hole 421 will be closed, effectively blocking the release of steam. At this time, condensed water will continue to condense in the steam, and the condensed water will accumulate in the sleeve 41 and contact with the bellows 43.

[0040] As the temperature of the condensed water continues to decrease, the bellows 43 will gradually shrink, driving the valve flap 44 to separate from the drain hole 421, opening the drain hole 421, and allowing the cooled condensed water to be discharged into the valve cover 1 to form cooling water. Since the temperature-sensitive valve core 4 is set lower than the water outlet chamber 24, the cooling water will accumulate in the valve cover 1. When the cooling water level is higher than the water outlet chamber 24, the cooling water will be discharged from the water outlet 22 along the water outlet chamber 24.

[0041] When the condensed water in the sleeve 41 is discharged, the steam will continue to contact the bellows 43, that is, the valve flap 44 abuts against the drain hole 421, blocking the release of steam, and then repeating the above process.

[0042] Because the temperature-sensing valve core 4 is immersed in cooling water, the cooling water can quickly cool down the sleeve 41, that is, quickly cool down the condensed water in the sleeve 41, so that the bellows 43 contracts quickly, and the hydrophobic hole 421 opens, thereby accelerating the reaction speed of the bellows 43 and increasing the frequency of the hydrophobic process.

[0043] It should be noted that a drain port is also provided at the lower part of the valve cover 1 , and a normally closed stop valve is installed on the drain port to discharge the cooling water in the valve cover 1 when the steam trap is not in use.

[0044] It should also be noted that when the steam trap is used for the first time, since there is no cooling water in the valve cover 1, the condensed water is naturally cooled during the first steam trapping. The valve cover 1 is filled with cooling water only after the first steam trapping.

[0045] Because the steam trap is generally installed on the steam pipe, the pressure in the steam pipe will also act on the steam trap, so even if the water inlet of the valve cover 1 is lower than the water outlet, there will be no problem of cooling water backflow.

[0046] In summary, the present invention can make a certain amount of cooling water accumulate in the valve cover 1 by setting the temperature-sensitive valve core 4 lower than the water outlet chamber 24, and make the temperature-sensitive valve core 4 immersed in the cooling water. The cooling water can quickly cool down the temperature-sensitive valve core 4, so that the temperature of the condensed water condensed in the temperature-sensitive valve core 4 decreases, and the bellows 43 can react and open more quickly to discharge the condensed water in the steam pipe. At the same time, it can also save the need to set the condensation section at the front end. Through the cooperation of the filter chamber 31 and the screw plug 33, the stainless steel filter screen 32 can be quickly disassembled and assembled, and the filter 3 can be further quickly inspected and repaired online.

[0047] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0048] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0051] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A quick-response steam pipe drain valve, comprising a valve cover (1), the valve cover (1) being connected to a valve body (2), the valve body (2) being provided with a water inlet (21) and a water outlet (22) at both ends thereof, a filter (3) being provided in the water inlet (21), a temperature-sensitive valve core (4) being provided in the valve cover (1), the temperature-sensitive valve core (4) being fixedly connected to the valve body (2), characterized in that: A water inlet chamber (23) and a water outlet chamber (24) are provided in the valve body (2); one end of the water inlet chamber (23) is connected to the water inlet (21), and the other end of the water inlet chamber (23) is connected to the valve cover (1) through the temperature-sensitive valve core (4); two ends of the water outlet chamber (24) are respectively connected to the valve cover (1) and the water outlet (22); the temperature-sensitive valve core (4) is arranged below the water outlet chamber (24) so ​​as to allow the temperature-sensitive valve core (4) to be immersed in cooling water.

2. The quick-response steam pipe drain valve according to claim 1, characterized in that: The temperature-sensitive valve core (4) comprises a sleeve (41) arranged in the valve cover (1), one end of the sleeve (41) being fixedly connected to the valve body (2), the other end of the sleeve (41) being threadedly connected to a valve seat (42), the valve seat (42) being provided with a drain hole (421), a bellows (43) being sleeved in the sleeve (41), a valve flap (44) being arranged at one end of the bellows (43) close to the valve seat (42), the valve flap (44) being arranged corresponding to the drain hole (421), a spring (45) being arranged between the valve flap (44) and the valve seat (42), the two ends of the spring (45) respectively abutting against the valve flap (44) and the valve seat (42).

3. The quick-response steam pipe drain valve according to claim 2, characterized in that: A flange (46) is provided at one end of the bellows (43) which faces away from the valve flap (44); the flange (46) is connected to a surface of a side of the valve body (2) which faces away from the valve cover (1); a positioning tube (47) is further connected to the flange (46); the positioning tube (47) is sleeved on the bellows (43); one end of the positioning tube (47) which faces away from the flange (46) abuts against the valve seat (42); and a water permeable hole (471) is provided on the positioning tube (47).

4. The quick-response steam pipe drain valve according to claim 3, characterized in that: An adjusting member (48) for adjusting the bellows (43) is provided on the flange (46), and a protective cap (49) is provided on the adjusting member (48).

5. The quick-response steam pipe drain valve according to claim 1, characterized in that: The filter (3) comprises a filter chamber (31), the filter chamber (31) and the water inlet (21) are arranged at a certain angle, the water inlet (21) and the water inlet chamber (23) are connected through the filter chamber (31), and a stainless steel filter screen (32) is arranged in the filter chamber (31).

6. The quick-response steam pipe drain valve according to claim 5, characterized in that: One end of the filter chamber (31) facing away from the water outlet (22) is threadedly connected with a screw plug (33).

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