Exhaust valve with initial rapid exhaust function

Abstract

To provide an exhaust valve with an initial quick exhausting function, capable of avoiding the enlargement and complication of a structure.SOLUTION: An inflow port 31 of an automatic exhaust valve 1 is communicated and connected with liquid piping (not shown), and water or air flows into a basic valve chamber 61 and an initial valve chamber 62 in a direction of an arrow 91 through the inflow port 31 from the liquid piping. In the basic valve chamber 61 and the initial valve chamber 62, a basic float 10 and an initial float 20 are respectively provided so as to freely float, and float up or descend according to the water level of water in the valve chambers (the basic valve chamber 61 and the initial valve chamber 62). The automatic exhaust valve 1 quickly discharges air in the liquid piping in an initial state from a basic valve hole 16 and an initial valve hole 26, and then the initial float 20 maintains the valve-closing of the initial valve hole 26 according to pressure difference across the initial valve hole 26. In a normal state, the basic float 10 floats up or descends according to changes in the water level of the basic valve chamber 61 to repeat valve-closing or valve-opening of the basic valve hole 16 to suitably discharge air collecting in an upper part of the basic valve chamber 61.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The exhaust valve having an initial rapid exhaust function according to the present application relates to a configuration of an exhaust valve having a rapid exhaust function in the initial stage and an automatic exhaust function in normal operation. [Background technology]

[0002] In industrial plants, piping systems for transporting liquids such as water are often installed, and exhaust valves are provided in these piping systems. That is, in the initial stage of starting the transfer of the liquid, the piping system is filled with gases such as air, and such gases must be rapidly exhausted at the start of the transfer.

[0003] Furthermore, during normal operation while the liquid transfer is continuing, it is necessary to repeatedly exhaust gases such as air that have become mixed into the piping system. For this reason, an exhaust valve with an initial rapid exhaust function is provided in the piping system to perform rapid exhaust in the initial stage and automatic exhaust during normal operation.

[0004] An example of such an exhaust valve is the exhaust valve unit disclosed in Patent Document 1. This exhaust valve unit 100 includes a first exhaust valve 10 and a second exhaust valve 20 on a flow path for the purpose of improving the efficiency of exhausting air during liquid transfer (normal operation).

[0005] The first exhaust valve 10 is configured to open and discharge gas when gas flows in from the liquid piping 1 during liquid transfer, and to close when liquid flows in from the liquid piping 1. The second exhaust valve 20 is configured to discharge gas flowing in from the liquid piping 1 at the beginning of liquid transfer, and then close when liquid flows in from the liquid piping 1, and thereafter maintain the closed state.

[0006] As a result, at the beginning of liquid transfer, a large amount of air in the liquid piping 1 is rapidly discharged from the second exhaust valve 20, and during liquid transfer, air that has flowed into the inlet channel is appropriately discharged from the first exhaust valve 10. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2021-113600 Summary of the Invention [Problem to be solved by the invention]

[0008] In the exhaust valve unit 100 disclosed in Patent Document 1, the first exhaust valve 10 and the second exhaust valve 20 are each configured as independent devices, which results in large exhaust valves and a complex configuration. In particular, in an installation environment where a piping system is complexly arranged in a small space, the large size of the automatic valve may become an obstacle to installation.

[0009] The exhaust valve with an initial rapid exhaust function according to the present invention has an objective of solving these problems and providing an exhaust valve with an initial rapid exhaust function that can avoid an increase in size and a complicated configuration. [Means for solving the problem]

[0010] The exhaust valve having the initial rapid exhaust function according to the present application is a main body having an internal space into which a target liquid or target gas flows, and having a first valve hole and a second valve hole formed therein for discharging the target gas remaining in the internal space to the outside; a first opening / closing means provided in the main body for opening or closing the first valve hole, the first opening / closing means opening the first valve hole when the target gas remaining in the internal space reaches a certain amount and closing the first valve hole when the target gas falls below the certain amount; a second opening / closing means provided in the main body for opening or closing the second valve hole, the second opening / closing means opening the second valve hole to discharge the target gas in an early stage retained in the internal space to the outside, and closing the second valve hole after the discharge to maintain the closed state; It is characterized by having the following. [Effects of the Invention]

[0011] In the exhaust valve with the initial rapid exhaust function according to the present application, the first opening / closing means opens the first valve hole when the target gas accumulating in the internal space reaches a certain amount and closes the first valve hole when the amount falls below the certain amount, and the second opening / closing means opens the second valve hole to exhaust the target gas accumulating in the internal space in the early stage to the outside, and after the exhaust, closes the second valve hole to maintain the closed state.

[0012] Therefore, the target gas that is initially accumulating in the internal space is rapidly exhausted through both the first valve hole and the second valve hole, and thereafter the first valve hole repeatedly opens and closes depending on the amount of target gas accumulating in the internal space, automatically exhausting the target gas.

[0013] Therefore, the initial rapid exhaust of the target gas and the subsequent automatic exhaust of the target gas are performed through the internal space provided in the single main body, which makes it possible to avoid an exhaust valve with an initial rapid exhaust function from becoming larger and more complicated in structure. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a diagram showing the overall configuration of an automatic exhaust valve 1 that is a first embodiment of an exhaust valve having an initial rapid exhaust function according to the present application, and is a diagram showing the automatic exhaust valve 1 in an initial state. [Figure 2] FIG. 2 is a diagram showing the operating state of the automatic exhaust valve 1 shown in FIG. 1, showing a state in which only the basic float 10 is closed (the initial float 20 is open). [Figure 3] 2 is a diagram showing the operating state of the automatic exhaust valve 1 shown in FIG. 1, showing a state in which both the base float 10 and the initial float 20 are closed. FIG. [Figure 4] FIG. 2 is a diagram showing the operating state of the automatic exhaust valve 1 shown in FIG. 1, showing a state in which only the basic float 10 is open (the initial float 20 is kept closed). DETAILED DESCRIPTION OF THE INVENTION

[0015] [Terminology used in the embodiments] The main terms used in the embodiments correspond to the following elements of the exhaust valve having the initial rapid exhaust function according to the present application:

[0016] Automatic exhaust valve 1: Exhaust valve with initial rapid exhaust function Basic float 10...1st opening and closing means Basic valve hole 16...1st valve hole Initial float 20: Float means, second opening / closing means Initial valve hole 26...Second valve hole Weight adjustment means such as material and thickness of the adjustment weight 29 and initial float 20 Main body portion 30: First main body Main body 30 and cover 40 Cover portion 40: Second main body Barrier protrusion 48... Bottom barrier Basic valve chamber 61 and initial valve chamber 62...internal space Water...target liquid Air...target gas

[0017] [First embodiment] An automatic exhaust valve 1, which is a first embodiment of an exhaust valve having an initial rapid exhaust function according to the present application, will be described with reference to Figures 1 to 4. The automatic exhaust valve 1 in this embodiment is provided in a liquid pipe (not shown) for pressure-feeding and supplying water (liquid) to the user side, and exhausts air (gas) present in the liquid pipe to the outside of the piping system.

[0018] (Overall configuration) First, the overall configuration of the automatic exhaust valve 1 will be described. As shown in Figure 1, the automatic exhaust valve 1 comprises a main body 30 and a cover 40. When the main body 30 and the cover 40 are connected, a basic valve chamber 61 and an initial valve chamber 62 that are connected to each other and integrated are formed inside. The main body 30 and the cover 40 are fixed with a plurality of bolts 51 with a gasket 52 in between, maintaining the airtightness of the basic valve chamber 61 and the initial valve chamber 62. The cover 40 is provided with a barrier protrusion 48 that separates the basic valve chamber 61 and the initial valve chamber 62 at the bottom of the valve chambers (the basic valve chamber 61 and the initial valve chamber 62).

[0019] An inlet 31 and an outlet 32 ​​are formed coaxially in the vertical direction in the main body 30. The inlet 31 is connected to and communicates with a liquid pipe, and water and air flow from the liquid pipe through the inlet 31 in the direction of arrow 91 into the basic valve chamber 61 and the initial valve chamber 62. In addition, an outlet path 36 communicating with the outlet 32 ​​is formed in the upper part of the main body 30.

[0020] A basic float 10 is arranged so as to float freely in the basic valve chamber 61. This basic float 10 is composed of a hollow spherical body, and rises according to the amount of water remaining in the basic valve chamber 61. A stopper 39 is fixed to the cover part 40, and this stopper 39 restricts the basic float 10 from floating up.

[0021] An initial float 20 is arranged in the initial valve chamber 62 so that it can float. The initial float 20 is formed as a hollow sphere, and rises according to the amount of water remaining in the initial valve chamber 62. The diameter of the initial float 20 is formed to be sufficiently smaller than the diameter of the basic float 10. In this embodiment, the diameter of the initial float 20 is formed to be approximately three-sevenths the diameter of the basic float 10.

[0022] The initial float 20 also incorporates an adjustment weight 29. As will be described later, this adjustment weight 29 enhances the rapid air exhaust function in the initial stage and also has the effect of ensuring that the initial float 20 returns to its initial position.

[0023] A cover chamber 45 is formed in the cover part 40 as an internal space, and the basic valve seat 15 is fixed and disposed in this cover chamber 45 by screw connection. A basic valve seat flow path 17 that communicates with the cover chamber 45 is formed inside the basic valve seat 15, and a small basic valve hole 16 that communicates with the basic valve seat flow path 17 is formed at the tip. A basic flow path 11 is formed in the cover part 40, and this basic flow path 11 connects the cover chamber 45 to the outflow path 36 formed on the main body part 30 side.

[0024] That is, a flow path is formed by continuously connecting the basic valve chest 61, the basic valve hole 16, the basic valve seat flow path 17, the cover chamber 45, the basic flow path 11, the outflow path 36, and the outlet 32, and the air inside the basic valve chest 61 is discharged in the direction of arrow 93. Note that, according to the flow of air in this flow path, the inlet 31 and basic valve chest 61 side is the upstream side, and the outlet 32 ​​side is the downstream side, with the basic valve chest 16 as the boundary.

[0025] Figure 1 shows the initial state of the automatic exhaust valve 1, with the basic float 10 and the initial float 20 seated at the bottom of the basic valve chamber 61 and the initial valve chamber 62, respectively. If water flows into and accumulates in the basic valve chamber 61 from this initial state, the basic float 10 will rise according to the amount of water. When it reaches its limit of floating, the outer circumferential surface of the basic float 10 abuts against the tip of the basic valve seat 15, blocking the basic valve hole 16 and closing the valve (see Figure 2).

[0026] On the other hand, when the water level in the basic valve chamber 61 is pushed down and the water volume decreases as the amount of air in the basic valve chamber 61 increases, the basic float 10 moves away from the tip of the basic valve seat 15, opening the basic valve hole 16 and opening the valve. The state in which the basic float 10 moves away from the tip of the basic valve seat 15 is the open state in which the basic valve hole 16 is open.

[0027] An initial use flow path 21 communicating with the cover chamber 45 is formed in the cover part 40. An end of the initial use flow path 21 communicates with the initial use valve chamber 62, and an initial use valve seat 25 having an initial use valve hole 26 formed therein is fixed to this end.

[0028] That is, the initial valve chamber 62, the initial valve hole 26, the initial flow path 21, the cover chamber 45, the basic flow path 11, the outflow path 36, and the outlet 32 ​​are continuously connected to form a flow path, and the air inside the initial valve chamber 62 can be discharged in the direction from arrow 92 to arrow 93. According to the air flow in this flow path, the initial valve chamber 62 side is upstream, and the outlet 32 ​​side is downstream.

[0029] The diameter of the initial valve hole 26 is formed to be sufficiently larger than the diameter of the basic valve hole 16. In this embodiment, the diameter of the initial valve hole 26 is formed to have a length approximately three times the diameter of the basic valve hole 16.

[0030] When the initial float 20 rises from the initial state shown in Figure 1 in accordance with the amount of water in the initial valve chamber 61 and reaches its limit position, the outer surface of the initial float 20 abuts against the initial valve seat 25, blocking the initial valve hole 26 and closing the valve (see Figure 3). This state is the closed valve state in which the initial valve hole 26 is blocked.

[0031] In contrast, when the water level in the initial valve chamber 62 is pushed down and the water volume decreases as the amount of air in the initial valve chamber 62 increases, the initial float 20 moves away from the initial valve seat 25, opening the initial valve hole 26 and opening the valve. The state in which the initial float 20 moves away from the initial valve seat 25 is the open state in which the initial valve hole 16 is open.

[0032] (Explanation of operation) Next, we will explain the operation of the automatic exhaust valve 1. Immediately after water is injected into the liquid piping (not shown) and pressure-feeding of the water begins, the liquid piping is filled with air. In this initial stage, it is necessary to exhaust the air in the liquid piping as quickly as possible through the automatic exhaust valve 1.

[0033] In the initial state, the basic float 10 and initial float 20 of the automatic exhaust valve 1 are both seated on the bottom of the valve chamber (basic valve chamber 61 and initial valve chamber 62) due to their own weight, as shown in Figure 1, and both the basic valve hole 16 and initial valve hole 26 are open. Therefore, the air in the liquid piping is subjected to the pressure of the compressed water and is discharged from the basic valve chamber 61 and initial valve chamber 62 of the automatic exhaust valve 1 through the basic valve hole 16 and initial valve hole 26 in the directions of arrows 91, 92, and 93 through the outlet 32.

[0034] At this time, as described above, the diameter of the initial valve hole 26 is formed to be sufficiently larger than the diameter of the basic valve hole 16, so most of the air flows out through the initial valve hole 26. This allows the air in the liquid piping to be rapidly discharged.

[0035] After the initial air is discharged, water flows into the basic valve chamber 61 from the inlet 31 in the direction of the arrow 91 as the water is pumped, and water first gradually accumulates in the basic valve chamber 61. This inflow of water causes the basic float 10 to float up and rise according to the water level in the basic valve chamber 61.

[0036] When the water level stored in the basic valve chamber 61 exceeds the barrier protrusion 48, the water flows from the basic valve chamber 61 into the initial valve chamber 62 and is stored therein. The accumulation of water in the initial valve chamber 62 causes the initial float 20 to float up and rise according to the water level in the initial valve chamber 62.

[0037] Here, as mentioned above, the initial float 20 is provided with the adjustment weight 29, making the weight of the entire initial float 20 heavier. For this reason, it is more deeply submerged than the basic float 10. Therefore, as shown in Figure 2, even when the water level in the valve chambers (basic valve chamber 61 and initial valve chamber 62) reaches level L2 and the basic float 10 closes the basic valve hole 16, the initial float 20 remains deeply submerged and keeps the initial valve hole 26 open.

[0038] In this way, the initial float 20 continues to open the initial valve hole 26 for a while after the basic float 10 closes the basic valve hole 16. As a result, more air remaining in the valve chambers (basic valve chamber 61 and initial valve chamber 62) can be discharged from the initial valve hole 26.

[0039] Thereafter, when the water level rises further and reaches level L3, the initial float 20 rises to the surface and closes the initial valve hole 26, as shown in Figure 3. That is, the basic valve hole 16 and the initial valve hole 26 are closed by the basic float 10 and the initial float 20, respectively. This prevents water being pumped through the liquid piping from leaking from the automatic exhaust valve 1.

[0040] Furthermore, if the weight of the adjustment weight 29 built into the initial float 20 is adjusted in advance, the degree to which the initial float 20 rises can be controlled. This makes it possible to freely set the timing of closing the initial valve hole 26. In other words, if the initial float 20 is made heavier using the adjustment weight 29 and adjusted so that it sinks deeper into the water in the initial valve chamber 62, the timing of closing the initial valve hole 26 can be delayed, further improving the rapid air exhaust function in the initial stage.

[0041] With the basic valve hole 16 and the initial valve hole 26 closed, the liquid piping continues to pump water (normal stage), but air may enter the liquid piping, for example, from the outlet of the piping system. Since air generated in this normal stage reduces the efficiency of pumping water, it must be discharged as appropriate through the automatic exhaust valve 1.

[0042] In this embodiment, air pressurized through the liquid piping flows from the inlet 31 into the basic valve chamber 61 and the initial valve chamber 62, rises, and accumulates in the upper part of the basic valve chamber 61. Thereafter, as the amount of accumulated air increases, air also accumulates in the upper part of the initial valve chamber 62, and the water levels in the basic valve chamber 61 and the initial valve chamber 62 are pushed down.

[0043] As mentioned above, the diameter of the initial valve hole 26 is made sufficiently larger than the diameter of the basic valve hole 16, and the diameter of the initial float 20 is made sufficiently smaller than the diameter of the basic float 10. In addition, because the liquid piping is pumping water, the pressure downstream of the initial valve hole 26 is lower than the pressure upstream.

[0044] 4, even if the water level in the valve chambers (basic valve chamber 61 and initial valve chamber 62) is pushed down to level L1, the initial float 20 remains adsorbed to and in contact with the initial valve seat 25 due to the pressure difference across the initial valve hole 26. In other words, regardless of the drop in the water level in the initial valve chamber 62, the initial float 20 maintains the initial valve hole 26 closed.

[0045] On the other hand, the basic valve hole 16 of the basic valve seat 15 has a small diameter and is formed as a small hole, and the diameter of the basic float 10 is also relatively large, so when the water level in the basic valve chamber 61 drops to level L1, the basic float 10 drops by its own weight in response to the drop in the water level. This opens the basic valve hole 16, and air that has accumulated in the upper part of the basic valve chamber 61 is discharged through the basic valve hole 16 and the outlet 32.

[0046] The air trapped in the upper part of the basic valve chamber 61 is discharged through the basic valve hole 16, causing the water levels in the basic valve chamber 61 and the initial valve chamber 62 to rise. As a result, the basic float 10 rises to the surface and closes the basic valve hole 16 again to prevent water leakage. In this way, the basic float 10 repeatedly rises and falls in response to changes in the water levels in the basic valve chamber 61 and the initial valve chamber 62, and appropriately discharges the air trapped in the basic valve chamber 61.

[0047] As described above, the automatic exhaust valve 1 according to this embodiment rapidly discharges air in the liquid piping from the basic valve hole 16 and the initial valve hole 26 in the initial stage, and thereafter the initial float 20 keeps the initial valve hole 26 closed in accordance with the pressure difference across the initial valve hole 26. Then, in the normal stage, the basic float 10 rises or falls in accordance with changes in the water level in the basic valve chest 61, repeatedly closing or opening the basic valve hole 16, and appropriately discharging air that has accumulated in the upper part of the basic valve chest 61.

[0048] Therefore, the rapid exhaust of air from the basic valve hole 16 and the initial valve hole 26 in the initial stage, and the subsequent automatic exhaust of air from the basic valve hole 16 in the normal stage, are performed via a single valve chest (the basic valve chest 61 and the initial valve chest 62).This makes it possible to avoid the automatic exhaust valve 1 becoming larger and its structure becoming more complicated.

[0049] When the liquid piping has completed transferring water and the pressure transfer is stopped, the pressure difference across the initial valve hole 26 is eliminated, causing the initial float 20 to fall by its own weight, open the initial valve hole 26, and return to the initial position shown in Figure 1, where it sits at the bottom of the initial valve chamber 62.

[0050] However, water adheres to the spherical surface of the initial float 20, and due to the effect of its surface tension, it is possible that the initial float 20 will stick to the initial valve seat 25 and not fall, even though the liquid piping has stopped pumping water. If this were to occur, the initial float 20 would not return to its original position properly, leaving the initial valve hole 26 closed, and the next time the liquid piping starts pumping water, it would be impossible to quickly vent the air from the initial stage through the initial valve hole 26, which could be an inconvenience.

[0051] In this regard, in this embodiment, as described above, the initial float 20 is provided with the adjustment weight 29, and the weight of the entire initial float 20 is set to be heavy. Therefore, when the liquid piping completes the transfer of water and stops pumping, the initial float 20 falls appropriately under its own weight and can be reliably restored to the seated position shown in Figure 1.

[0052] Furthermore, the automatic exhaust valve 1 according to this embodiment is provided with an inlet 31, a basic valve chamber 61, a basic float 10, an outlet passage 36, and an outlet 32 ​​on the main body 30 side, and with an initial valve chamber 62, an initial float 20, an initial valve hole 26, an initial passage 21, a basic valve hole 16, and a basic passage 11 on the cover 40 side. Therefore, by attaching the cover 40 according to this embodiment to the main body of an exhaust valve that does not have a rapid initial exhaust function, it can be easily converted into an exhaust valve with a rapid initial exhaust function without replacing the main body. This increases the versatility of the exhaust valve.

[0053] As mentioned above, the cover part 40 is provided with the barrier protrusions 48, so when the cover part 40 is attached to the main body part, the movement of the initial float 20 is stopped by the barrier protrusions 48, preventing the initial float 20 from falling off the cover part 40. This improves the efficiency of the work of attaching the cover part 40.

[0054] [Other embodiments] In the above embodiment, an example was given in which the exhaust valve having the rapid initial exhaust function according to the present application was applied to the automatic exhaust valve 1, but the present invention is not limited to this and can also be applied to exhaust valves having other configurations. For example, it may be applied to an exhaust valve that receives the inflow of a target liquid other than water, or an exhaust valve that discharges a target gas other than air.

[0055] Furthermore, in the above embodiment, the basic valve chamber 61 and the initial valve chamber 62 are exemplified as internal spaces, but spaces of other shapes and structures can also be adopted as long as they are spaces into which the target liquid (water, etc.) or target gas (air, etc.) flows and remains.

[0056] Furthermore, in the above embodiment, the basic float 10 is exemplified as the first opening / closing means, but other configurations may be adopted as long as they open the first valve hole (basic valve hole 16, etc.) when the target gas (air, etc.) remaining in the internal space (basic valve chamber 61 and initial valve chamber 62, etc.) reaches a certain amount and close the first valve hole when the amount falls below the certain amount.

[0057] Furthermore, in the above embodiment, the initial float 20 is exemplified as the second opening / closing means or float means, but other configurations may be adopted as long as they open the second valve hole (initial valve hole 26) to discharge the target gas (air, etc.) in the initial stage to the outside and keep the second valve hole closed after the discharge.

[0058] In addition, in the above embodiment, the adjustment weight 29 is exemplified as the weight adjustment means, but other configurations can be adopted as long as they can adjust the weight of the float means (initial float 20, etc.). For example, the weight of the float means (initial float 20, etc.) can be adjusted by adjusting the material or thickness of the float means. [Explanation of symbols]

[0059] 10: Basic float 16: Basic valve hole 20: Initial float 26: Initial valve hole 29: Adjustment weight 30: Main body 40: Cover 48: Barrier protrusion 61: Basic valve chamber 62: Initial valve chamber

Claims

[Claim 1] a main body having an internal space into which a target liquid or a target gas flows, and in which a first valve hole and a second valve hole are formed for discharging the target gas remaining in the internal space to the outside, the main body being configured with the first main body and the second main body in which the second valve hole is formed; a first opening / closing means provided in the first main body for opening or closing the first valve hole, the first opening / closing means opening the first valve hole when the target gas remaining in the internal space reaches a certain amount and closing the first valve hole when the target gas falls below the certain amount; a second opening / closing means provided in the second main body for opening or closing the second valve hole, the second opening / closing means opening the second valve hole to discharge the target gas in an early stage retained in the internal space to the outside, and closing the second valve hole after the discharge to maintain the closed state; It is equipped with A bottom barrier is provided on the bottom of the second body to separate the first body from the second body. An exhaust valve having an initial rapid exhaust function characterized by:

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