Automatic valve device
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TLV CO LTD
- Filing Date
- 2024-12-25
- Publication Date
- 2026-07-07
Smart Images
Figure 2026112574000001_ABST
Abstract
Description
Technical Field
[0001] The automatic valve device according to the present application relates to a technology for automatically cleaning the valve chamber of an automatic valve device that automatically opens and closes a valve to discharge fluids such as drain.
Background Art
[0002] Industrial plants may have a piping system installed to transfer steam generated in a boiler to a supply destination such as a heat exchanger. Since this steam condenses by heat dissipation and part of it changes to drain (condensed water), drain flows in the piping together with the steam. When such drain stays in the piping excessively, it becomes an obstacle to the transfer of steam. Therefore, it is necessary to appropriately discharge the drain from the piping system to the outside.
[0003] For this purpose, automatic valve devices such as steam traps and drain traps are provided at various locations in the piping system. A branch pipe for trap installation communicates with and extends from the main pipe of the piping system for transferring steam. Usually, a steam trap or the like is provided on this branch pipe.
[0004] There are various structures of automatic valve devices. Patent Document 1 below discloses a free float type drain trap. This drain trap has a trap chamber 6 inside, and a float 19 is arranged in the trap chamber 6 so as to be floating. By the floating of the float 19, an exhaust valve hole 21 formed at the bottom of the trap chamber 6 is opened and closed.
[0005] A cylindrical screen 9 is provided at the upper part of the trap chamber 6, and an inverted bowl-shaped float cover 12 is arranged inside this cylindrical screen 9. The float cover 12 has a through hole 10 provided biased toward the inlet 5 side and a vent hole 11 provided at the center. Further, a temperature-responsive member 25 for opening and closing the exhaust valve hole 21 is provided at the upper part of the float cover 12. The temperature-responsive member 25 has a function of expanding and contracting in response to the ambient temperature. The exhaust valve hole 21 communicates with the outlet passage 8 through an exhaust passage 26.
[0006] To start the piping system, initial blow-off air flows in from inlet 5. However, since this initial air is cold, the temperature-sensitive member 25 keeps the exhaust valve hole 21 open, and the initial air passes through the exhaust passage 26 and outlet passage 8 and is discharged from outlet 7. After this, high-temperature wastewater and condensate flow in from inlet 5, and the temperature-sensitive member 25 located at the top closes the exhaust valve hole 21.
[0007] The condensate flowing in from the inlet 5 accumulates in the trap chamber 6, causing the float 19 to rise and open the drain valve hole 21 formed at the bottom of the trap chamber 6. With the drain valve hole 21 open, the condensate is discharged from the outlet 7 through the branch hole 17 and the outlet passage 8. After the condensate is discharged, the float 19 descends to close the drain valve hole 21 and is held in contact with the float seat 20 formed at the bottom of the trap chamber 6. [Prior art documents] [Patent Documents]
[0008] [Patent Document 1] Japanese Patent Publication No. 2013-231462 [Overview of the project] [Problems that the invention aims to solve]
[0009] In automatic valve devices such as steam traps, foreign matter such as dust and scale can enter by mixing with steam or drain, and this foreign matter adheres to and accumulates on the inner walls of valve chambers such as the trap chamber 6. However, the steam trap disclosed in the aforementioned Patent Document 1 cannot automatically clean such foreign matter.
[0010] In particular, if foreign matter adheres to the float seat 20 formed at the bottom of the trap chamber 6, the position of the float 19 when it is blocking the exhaust valve hole 21 will be tilted, and the float 19 may not be able to properly block the exhaust valve hole 21, which can lead to a valve closing failure. In the steam trap disclosed in Patent Document 1, cleaning foreign matter in the trap chamber 6 requires disassembling the device, which increases the maintenance effort.
[0011] Therefore, the purpose of the present invention is to provide an automatic valve device that can automatically clean foreign matter adhering to the inner wall of the valve chamber. [Means for solving the problem]
[0012] The automatic valve device relating to this application is A main body having an inlet, a valve chamber communicating with the inlet, and an outlet communicating with the valve chamber. A basic discharge channel formed through the inlet, valve chamber, and outlet, which allows a basic fluid flowing in from the inlet to pass through and discharges it from the outlet. An opening / closing means is disposed to float freely in the valve chamber, floats in accordance with the inflow of the basic fluid, and opens or closes the communication between the valve chamber and the outlet. A preceding discharge channel formed through the inlet and outlet portions but without passing through the valve chamber portion, wherein the preceding discharge channel allows the preceding fluid flowing in from the inlet portion to pass through and discharges from the outlet portion. A partition section arranged along all or part of the aforementioned preceding discharge channel, An automatic valve device equipped with, The partition portion has an introduction space for introducing the preceding fluid toward the valve chamber, and a guide portion for guiding the preceding fluid from the introduction space toward the valve chamber and circulating it along the inner wall of the valve chamber. It is characterized by the following: [Effects of the Invention]
[0013] In the automatic valve device according to the present application, the partition portion arranged along all or part of the prior discharge flow path has an introduction space for introducing the prior fluid toward the valve chamber portion, and a guide portion for guiding the prior fluid from the introduction space to the valve chamber portion and flowing it along the inner wall of the valve chamber portion. Therefore, foreign matter adhering to the inner wall of the valve chamber portion can be peeled off by the flow pressure of the prior fluid. Accordingly, the foreign matter adhering to the inner wall of the valve chamber portion can be automatically cleaned.
Brief Description of the Drawings
[0014] [Figure 1] FIG. 8 is an overall cross-sectional view of a steam trap 90 as a first embodiment of the automatic valve device according to the present application. [Figure 2] A is a plan view of the float cover 2 and the strainer 80 shown in FIG. 1, and B is a cross-sectional view taken along the arrow in the direction IIB-IIB of the float cover 2 and the strainer 80. [Figure 3] FIG. 14 is a view showing a steam trap as a second embodiment of the automatic valve device according to the present application. A is a cross-sectional view of the float cover 4 and the strainer 80 in a state where the retractable plate 45 is open, and B is a cross-sectional view of the float cover 4 and the strainer 80 in a state where the retractable plate 45 is closed.
Modes for Carrying Out the Invention
[0015] [Term Explanation in the Embodiment] The main terms shown in the embodiment respectively correspond to the following elements of the automatic valve device according to the present application.
[0016] Float covers 2, 4... Partition portion Float 7... Opening and closing means Valve chamber 10... Valve chamber portion Lower body 11 and upper body 12... Body portion Inlet ports 21, 41... Introduction space Retractable plates 25, 45... Guide portion Guide bottom surfaces 27, 47... Guide plane Inlet 97... Inlet portion Inlet 97, valve chamber 10, orifice 51, valve seat flow path 52, outflow path 18, and outlet 99... basic discharge flow path Inlet 97, upper valve port 61, upper flow path 68, outflow path 18, and outlet 99... prior discharge flow path Outlet 99... outlet section Opening angle a... guiding angle Reference temperature A... reference temperature Bimetal... temperature-responsive member Drain... basic fluid Initial air... prior fluid
[0017] [First Embodiment] The first embodiment of the automatic valve device according to the present application will be described. In this embodiment, an example in which the automatic valve device according to the present application is applied to a steam trap will be given.
[0018] (Explanation of the Configuration of Steam Trap 90) In an industrial plant, there may be a piping system installed to transfer steam generated by a boiler to a supply destination at high temperature and high pressure. When this steam condenses, drain is generated, and if the drain accumulates excessively in the piping, it will become an obstacle to the transfer of steam. Therefore, in order to appropriately discharge the drain from the piping system to the outside, a large number of steam traps are provided at various locations in the piping system.
[0019] FIG. 1 is a cross-sectional view of the steam trap 90 in this embodiment, FIG. 2A is a plan view of the float cover 2 and the strainer 80 shown in FIG. 1, and FIG. 2B is a cross-sectional view taken along the arrow in the IIB-IIB direction of the float cover 2 and the strainer 80.
[0020] The upper body 12 is connected to the lower body 11 and fixed by bolts. A space is formed inside the lower body 11, and by fixing the upper body 12 with a gasket interposed therebetween, a valve chamber 10 with airtightness inside is formed. The inner wall of this valve chamber 10 is configured to have a spherical curved surface.
[0021] A branch pipe 81 is provided in communication with the main pipe (not shown) of the piping, and an inlet 97 formed in the lower body 11 is connected to this branch pipe 81. Steam and condensate then flow into the valve chamber 10 from the inlet 97 in the direction of arrow 101. An outlet 99 is also formed in the lower body 11 coaxially with the inlet 97, and a discharge pipe 82 is connected to this outlet 99.
[0022] A cylindrical strainer 80 is provided at the top of the valve chamber 10. The strainer 80 has a mesh section, and steam and condensate flowing in from the inlet 97 pass through this mesh section of the strainer 80 and flow into the valve chamber 10. By passing through the strainer 80, foreign matter such as dirt and scale mixed in with the steam and condensate is captured by the mesh section of the strainer 80.
[0023] As shown in Figures 1 and 2A and 2B, a float cover 2 is positioned and fixed inside the strainer 80. The float cover 2 has a roughly disc shape, with the central circular portion curving upwards and a central hole 22 formed in the center.
[0024] Three circumferential holes 23 are formed symmetrically on the circumference of the float cover 2 (Figure 2A). The drain that flows in from the inlet 97 mainly passes through these six circumferential holes 23 and flows down into the valve chamber 10.
[0025] Furthermore, the float cover 2 has a rectangular inlet 21 located near the central curved section, and a retraction plate 25 is attached to one side of this rectangle, the side closest to the central hole 22. The retraction plate 25 has a rectangle corresponding to the inlet 21. As shown in Figure 2B, the guide bottom surface 27, which is the lower surface of the retraction plate 25, is flat and is provided in an open state, bent to form an opening angle a with respect to the upper surface of the float cover 2.
[0026] These inlet 21 and pull-in plate 25 are formed by cutting notches into three rectangular sides of the float cover 2 and then bending the other side upwards. Alternatively, the pull-in plate 25 can be constructed as a separate component and attached to the float cover 2 by welding or other means.
[0027] As shown in Figure 1, the lower body 11 has a cylindrical mounting space formed diagonally below the valve chamber 10. This mounting space communicates with an outflow passage 18 formed in the lower body 11, and the outflow passage 18 further communicates with an outlet 99. A substantially cylindrical valve seat 50 is positioned inside the mounting space.
[0028] An orifice 51 is formed at the tip of the valve seat 50, and this orifice 51 is connected to a valve seat passage 52 that is formed in a substantially cylindrical shape within the valve seat 50. In other words, the valve chamber 10 and the valve seat passage 52 within the valve seat 50 are in communication through the orifice 51. The rear end of the valve seat 50 is open, and the valve seat passage 52 is connected to the outflow passage 18. A valve seat cap 15 is screwed into the lower body 11 with a gasket in between.
[0029] A float 7, configured as a hollow spherical body, is movably positioned within the valve chamber 10. When the water level of the drain accumulated in the valve chamber 10 is low, the float 7, due to its own weight, sits and contacts the valve seat 50 and two support pieces 19 provided at the bottom of the valve chamber 10, closing the orifice 51. Conversely, when the amount of drain accumulated in the valve chamber 10 increases and the water level rises, the float 7 floats up, separates from the valve seat 50, and opens the orifice 51.
[0030] Furthermore, the aforementioned float cover 2 has the function of restricting excessive rise of the float. In addition, the guide bottom surface 27 of the aforementioned retraction plate 25 is set to be on the same plane as the tangent plane S1 of the float 7.
[0031] In this embodiment, the upper body 12 of the steam trap 90 has an upper flow path 68 that connects the valve chamber 10 and the outflow passage 18. An upper valve seat 60, which has an upper valve opening 61, is fixed to the valve chamber 10 side of this upper flow path 68. Below the upper valve seat 60, a temperature-sensitive plate 67 is provided. The temperature-sensitive plate 67 is supported by a support member 64 fixed to the upper body 12 and is positioned close to the upper valve opening 61 of the upper valve seat 60.
[0032] Note that in Figure 1, the temperature-sensitive platen 67 is shown as a side view rather than a cross-sectional view. This temperature-sensitive platen 67 is primarily used in the initial stages of steam transfer to discharge initial air present in the piping and valve chamber 10 through the upper flow path 68 and outlet passage 18 to the discharge pipe 82 in the direction of arrow 102, thereby eliminating air binding (air obstruction).
[0033] The temperature-sensitive plate 67 has an expansion medium sealed inside, which contracts or expands in response to the ambient temperature. In this embodiment, when the temperature-sensitive plate 67 is below a predetermined reference temperature A, it deforms into a contracted state, moving away from the upper valve seat 60 and opening the upper valve port 61. Conversely, when the temperature is higher than the predetermined reference temperature A, the temperature-sensitive plate 67 expands and sits on the upper valve seat 60, closing the upper valve port 61. Note that the air inside the steam trap 90 is below the reference temperature A, while the steam and condensate are above the reference temperature A.
[0034] (Explanation of the operation of Steam Trap 90) Next, the operation of the steam trap 90 will be explained. When the piping system starts operating, the steam trap 90 is almost completely filled with initial air for blowing. As a result, the float 7 is seated on the valve seat 50 by its own weight, blocking the orifice 51, and the temperature inside the valve chamber 10 is low, below the aforementioned reference temperature A, so the temperature-sensitive plate 67 contracts and separates from the upper valve seat 60, leaving the upper valve port 61 open.
[0035] From this state, the piping system begins operation. At this time, the steam transfer pressure is added to the initial air in the valve chamber 10 from the inlet 97, and the initial air in the piping flows in vigorously in the direction of arrow 101. The initial air flowing in along the direction of arrow 101 passes through the upper valve port 61, the upper flow path 68 and the outflow passage 18, and is discharged from the outlet 99 to the discharge pipe 82 along the direction of arrow 102.
[0036] As described above, the float cover 2 is provided with an inlet 21 and a draw-in plate 25. Therefore, a portion of the initial air flowing in from the inlet 97 along the direction of arrow 101 collides with the draw-in plate 25 and is guided by the guide bottom surface 27 of the draw-in plate 25, entering the valve chamber 10 from the inlet 21 with force. Since the draw-in plate 25 is open in a direction opposite to the initial air flowing in from the inlet 97, it can guide the initial air into the valve chamber 10 without weakening its flow pressure. The entered initial air then flows smoothly along the curved surface of the inner wall of the valve chamber 10 in the directions of arrows 103 and 104.
[0037] Here, foreign matter such as dust and scale mixed in the steam and drain is captured by the mesh portion of the strainer 80 mentioned above, but fine foreign matter can pass through the mesh portion of the strainer 80 and enter the valve chamber 10. This foreign matter often adheres to the inner wall of the valve chamber 10. In particular, foreign matter tends to adhere to the two support pieces 19 that protrude from the inner wall at the bottom of the valve chamber 10.
[0038] In this embodiment, foreign matter adhering to the support piece 19 or the inner wall is detached and removed by the flow pressure of the initial air entering the valve chamber 10. This allows for automatic cleaning of foreign matter adhering to the inner wall of the valve chamber 10.
[0039] Furthermore, the initial air flowing vigorously along the directions of arrows 103 and 104 causes the float 7 to rotate within the valve chamber 10. This rotation of the float 7 causes any foreign matter adhering to the tip of the valve seat 50 or the support piece 19, to be scraped off by friction with the float 7, in addition to the flow pressure of the initial air. As mentioned above, the guide bottom surface 27 that forms the opening angle a of the retraction plate 25 is set to be on the same plane as the tangent plane S1 of the float 7, so that the initial air flowing in guided by the retraction plate 25 can reliably rotate the float 7.
[0040] The initial air that enters the valve chamber 10 and flows in the directions of arrows 103 and 104 exits the float cover 2 through the central hole 22 along the direction of arrow 105, passes through the upper valve opening 61, and is discharged in the direction of arrow 102. Some of the foreign matter peeled off from the inner wall of the valve chamber 10 is discharged in the direction of arrow 102 along with the initial air, and the remainder is discharged in the direction of arrow 109 along with the drain when the float 7 floats up due to the accumulation of drain. In this embodiment, the flow pressure of the initial air is used to automatically clean the foreign matter adhering to the inner wall of the valve chamber 10.
[0041] After the initial air is discharged, high-temperature steam flows into the valve chamber 10 from the inlet 97. The steam also condenses, generating high-temperature condensate, which also flows into the valve chamber 10 from the inlet 97, just like the steam. As a result, the temperature inside the steam trap 90 rises to a level higher than the aforementioned reference temperature A, and the temperature-sensitive plate 67 reacts by expanding and seating on the upper valve seat 60, blocking the upper valve opening 61.
[0042] Thereafter, the valve chamber 10 remains at a high temperature due to high-temperature steam and condensate while the piping system is in operation, so the upper valve port 61 remains closed. Therefore, while the piping system is in operation and the steam trap 90 is working to discharge condensate, no steam leakage occurs from the upper valve port 61.
[0043] When drain water flows in from the inlet 97, it mainly flows down into the valve chamber 10 through the peripheral through holes 23 of the float cover 2 and accumulates in the valve chamber 10. When the drain water level in the valve chamber 10 rises, the float 7 rises accordingly, separating from the orifice 51 and opening the orifice 51. With the opening of the orifice 51, the drain water accumulated in the valve chamber 10 is carried by the force based on the high pressure in the piping, passing through the orifice 51 and the valve seat passage 52 to the outflow passage 18, and is discharged from the outlet 99 to the discharge pipe 82 in the direction of arrow 109.
[0044] After discharge, the water level of the drain in the valve chamber 10 decreases, and consequently the float 7 also decreases, seating on the valve seat 50 and closing the orifice 51. In this way, the orifice 51 opens and closes repeatedly as the float 7 rises and falls, discharging the drain as needed. However, since the orifice 51 is always submerged in the drain, no steam leakage occurs from the orifice 51.
[0045] In this embodiment, the float cover 2 is positioned along a portion of the flow path for discharging initial air (inlet 97, upper valve opening 61, upper flow path 68, outflow passage 18, and outlet 99) (the portion from the inlet 97 toward the upper valve opening 61).
[0046] [Second Embodiment] Next, a second embodiment of the automatic valve device according to the present invention will be described with reference to Figures 3A and 3B. Components identical to those in the first embodiment described above are denoted by the same reference numerals and their descriptions are omitted. In the first embodiment described above, the opening angle a of the retraction plate 25 of the float cover 2 was fixed and unchanging, but in this embodiment, the retraction plate 45 provided on the float cover 4 is movable. Other configurations and operations are the same as those in the first embodiment described above.
[0047] The float cover 4 has a roughly disc shape, with the central circular portion curving upwards and a central hole 42 formed in the center. Similar to the first embodiment, the circumferential portion of the float cover 4 has a periphery through hole for draining (see Figure 2A).
[0048] In this embodiment, the bent portion of the retraction plate 45 of the float cover 4 is made of a bimetal that deforms in response to ambient temperature. The bimetal is made by bonding together two types of materials with different expansion rates, and by utilizing the difference in expansion rates of the materials, it deforms in accordance with temperature changes of the materials. The retraction plate 45, including the bent portion, is made of this bimetal, and the retraction plate 45 is fixed to the float cover 4 by welding in an arrangement that closes the inlet 21.
[0049] In this embodiment, the bimetal of the inlet plate 45 is set to deform based on a predetermined reference temperature A, similar to the temperature-sensitive plate 67 described above. That is, when the temperature is below the reference temperature A, a part of the member deforms into a contracted state, and the inlet plate 45 opens to an opening angle a, opening the inlet 41 (Figure 3A). Conversely, when the temperature is higher than the predetermined reference temperature A, a part of the member deforms into an extended state, and the inlet plate 45 closes, blocking the inlet 41 (Figure 3B). As mentioned above, the air inside the steam trap 90 is below the reference temperature A, while the steam and condensate are above the reference temperature A.
[0050] Immediately after the piping system is activated, the steam trap 90 is almost completely filled with initial air and is below the reference temperature A. In this embodiment, the intake plate 45 is open as shown in Figure 3A, opening the inlet 41. Therefore, as in the first embodiment described above, some of the initial air enters the valve chamber 10 from the inlet 41 and dislodges any foreign matter adhering to the inner wall of the valve chamber 10. In this embodiment as well, the guide bottom surface 47 that forms the opening angle a of the intake plate 45 is set to be on the same plane as the tangent plane S1 of the float 7.
[0051] Then, after the initial air has been discharged, if high-temperature steam or condensate flows in, the temperature inside the steam trap 90 will rise above the reference temperature A, and the intake plate 45 will close as shown in Figure 3B, blocking the inlet 41. As a result, the incoming condensate will not collide with the open intake plate 45, but will flow smoothly over the top surface of the float cover 4, pass through the surrounding through holes (see surrounding through holes 23 in Figure 2A), and fall into the valve chamber 10.
[0052] Furthermore, because the inlet plate 45 blocks the inlet 21, the drain flows into the valve chamber 10 only from the peripheral through-hole 23 (Figure 2AA). As a result, the drain that flows into the valve chamber 10 flows down along the inner wall of the valve chamber 10 and does not directly hit the float 7. Therefore, it is possible to avoid the float 7 unnecessarily oscillating within the valve chamber 10 due to the inflow of drain, and to ensure stable opening and closing of the orifice 51 by the float 7.
[0053] [Other embodiments] In the embodiments described above, examples were given for each of the automatic valve device, inlet section, valve chamber section, outlet section, main body section, basic fluid, basic discharge channel, opening / closing means, preceding fluid, preceding discharge channel, partition section, introduction space, guide section, guide angle, guide plane, temperature-responsive member, and reference temperature. However, these are merely examples, and different configurations can be adopted for each of them.
[0054] In other words, for example, the above-described embodiment shows an example in which the automatic valve device according to the present application is applied to a steam trap, but it is not limited to this, and can be applied to other automatic valves as long as it is a valve device that opens and closes automatically in response to the inflow of fluid.
[0055] Furthermore, although a hollow, spherical float 7 was exemplified as the opening and closing means in the above-described embodiment, other configurations can be adopted as long as they are movably arranged in the valve chamber (valve chamber 10, etc.) and float in accordance with the inflow of the basic fluid (drain, etc.) to open and close the communication between the valve chamber (valve chamber 10, etc.) and the outlet (outlet 99, etc.).
[0056] Furthermore, in the embodiments described above, float covers 2 and 4, which have the function of restricting the excessive floating of the float 7, were exemplified as partitions. However, as long as they are arranged along all or part of the preceding discharge passage (inlet 97 upper valve opening 61, upper passage 68, outflow passage 18 and outlet 99, etc.), they may have different functions or have different shapes and structures.
[0057] Furthermore, while rectangular inlets 21 and 41 were exemplified as introduction spaces in the above-described embodiment, other shapes and structures can be used as long as they are spaces for introducing a preceding fluid (initial air, etc.) toward the valve chamber (valve chamber 10, etc.). Also, while rectangular pull-in plates 25 and 45 corresponding to the rectangular inlets 21 and 41 were exemplified as guides, other shapes and structures can be used as long as they guide the preceding fluid from the introduction space to the valve chamber and allow it to flow along the inner wall of the valve chamber.
[0058] Furthermore, the embodiments described above can be arbitrarily combined to create other embodiments. [Explanation of Symbols]
[0059] 2, 4: Float cover 7: Float 10: Valve chamber 11: Lower body 12: Upper body 18: Outlet passage 21, 41: Inlet 25, 45: Inlet plate 27, 47: Guide bottom surface 51: Orifice 52: Valve seat passage 61: Upper valve opening 68: Upper channel 97: Inlet 99: Outlet a: Opening angle A: Reference temperature
Claims
1. A main body having an inlet, a valve chamber communicating with the inlet, and an outlet communicating with the valve chamber. A basic discharge channel formed through the inlet, valve chamber, and outlet, which allows a basic fluid flowing in from the inlet to pass through and discharges it from the outlet. An opening / closing means is disposed to float freely in the valve chamber, floats in accordance with the inflow of the basic fluid, and opens or closes the communication between the valve chamber and the outlet. A preceding discharge channel formed through the inlet and outlet portions but without passing through the valve chamber portion, wherein the preceding discharge channel allows the preceding fluid flowing in from the inlet portion to pass through and discharges from the outlet portion. A partition section arranged along all or part of the aforementioned preceding discharge channel, An automatic valve device equipped with, The partition portion has an introduction space for introducing the preceding fluid toward the valve chamber, and a guide portion for guiding the preceding fluid from the introduction space toward the valve chamber and circulating it along the inner wall of the valve chamber. An automatic valve device characterized by the following features.
2. In the automatic valve device according to claim 1, The opening and closing means is a sphere having a spherical shape. An automatic valve device characterized by the following features.
3. In the automatic valve device according to claim 2, The guide portion is a guide plane located in an open state from the introduction space, and has a guide plane that receives the collision of the preceding fluid and guides the preceding fluid from the introduction space to the valve chamber. The guide plane is located on the same plane as the spherical tangent plane of the opening and closing means. An automatic valve device characterized by the following features.
4. In the automatic valve device according to claim 1, claim 2, or claim 3, The guide portion is formed of a temperature-sensitive member that opens or closes the introduction space in response to the ambient temperature, opening the introduction space when the ambient temperature is below a predetermined reference temperature, and closing the introduction space when the ambient temperature is higher than the reference temperature. The basic fluid is at a temperature higher than the reference temperature, and the preceding fluid is at a temperature lower than the reference temperature. An automatic valve device characterized by the following features.