JP6519863B2 - Valve system, and fluid facility including the same - Google Patents

Description

  The present invention relates to a valve system through which liquid flows, and a fluid facility including the same.

  The valve generally includes a valve housing in which a passage through which fluid flows is formed, and a valve body that divides the inside of the passage into an inlet chamber and an outlet chamber.

  As an installation provided with such a valve, there is an installation described in the following patent documents 1, for example. This facility branches off from the oil tank, the main line that leads the oil in the oil tank to the hydraulic equipment, the hydraulic pump provided in the main line, and a position downstream of the oil pump in the main line And a relief valve provided in the branch line. The relief valve plays a role in keeping the discharge pressure of the hydraulic pump substantially constant.

Japanese Utility Model Application Publication No. 62-097278

  In the technology described in Patent Document 1 described above, when gas such as air is contained in oil from the hydraulic pump, the gas such as air may be accumulated in the relief valve and the relief valve may malfunction. There is a problem of

  Then, this invention pays attention to such a problem of the prior art, and it aims at providing the valve system which can control the malfunctioning by a gas pool, and the fluid installation provided with the same.

A valve system according to one aspect of the invention for solving the above problems is:
A housing having a main passage formed therein for guiding liquid from the inlet to the outlet, and disposed in the main passage of the housing to divide the inside of the main passage into an inlet chamber on the inlet side and an outlet chamber on the outlet side And a communicating portion which is open at the inlet chamber and in which a communication passage is provided to communicate between the liquid chamber on the outlet chamber side and the inlet chamber with reference to the valve member. Prepare. The communication portion has a bypass flow rate regulator that regulates the flow rate of the fluid flowing through the communication path. The communication passage of the communication portion is a fluidic device connected to the outlet, which is opened by a liquid chamber into which the liquid flows, and brings the inlet chamber into communication with the liquid chamber.
Another aspect of the valve system according to the invention for solving the above problems is:
A housing having a main passage formed therein for guiding liquid from the inlet to the outlet, and disposed in the main passage of the housing to divide the inside of the main passage into an inlet chamber on the inlet side and an outlet chamber on the outlet side And a communicating portion which is open at the inlet chamber and in which a communication passage is provided to communicate between the liquid chamber on the outlet chamber side and the inlet chamber with reference to the valve member. Prepare. The communication portion has a bypass flow rate regulator that regulates the flow rate of the fluid flowing through the communication path. The valve body is fixed to the first end, and the second end includes the valve rod penetrating the housing from the main passage to the outside. An opening of the communication passage to the inlet chamber is open at a position on the position where the valve rod passes through the housing with reference to the valve body in the inlet chamber.
According to still another aspect of the present invention, there is provided a valve system comprising:
A housing having a main passage formed therein for guiding liquid from the inlet to the outlet, and disposed in the main passage of the housing to divide the inside of the main passage into an inlet chamber on the inlet side and an outlet chamber on the outlet side And a communicating portion which is open at the inlet chamber and in which a communication passage is provided to communicate between the liquid chamber on the outlet chamber side and the inlet chamber with reference to the valve member. Prepare. The communication portion has a bypass flow rate regulator that regulates the flow rate of the fluid flowing through the communication path. From the closed state where the valve body divides the main passage into the inlet chamber and the outlet chamber, when the pressure in the inlet chamber reaches a predetermined pressure or more, the liquid in the inlet chamber is in the outlet chamber. The drive unit is in the open state to flow into the

In the valve system of each of the above aspects, even if the valve system is closed, the fluid in the inlet chamber communicates with the inlet chamber of the housing and the liquid chamber on the outlet chamber side by the communication passage of the communication portion. It flows into the liquid chamber on the outlet chamber side. For this reason, in the valve system, when the valve system is in the closed state and liquid and gas are accumulated in the inlet chamber, this gas or this gas and liquid are on the outlet chamber side through the communication passage. It flows into the liquid chamber. Therefore, in the valve system, gas accumulation in the inlet chamber can be suppressed.
In the valve system according to the above aspect, even if it is difficult to connect the end of the communication pipe to the position where the outlet chamber is formed in the housing, the gas accumulation in the inlet chamber can be suppressed. it can.
The valve system is generally installed with the bonnet side where the valve stem passes through the housing up. For this reason, in the valve system as a standard specification, it is preferable to open the communication passage at the bonnet side portion where the valve stem in the inlet chamber penetrates the housing as in the other embodiment.

  Here, in the valve system, the minimum passage area of the communication passage may be smaller than the opening area of the outlet.

  In the valve system, the fluid in the inlet chamber flows into the fluid chamber on the outlet chamber side even when the valve system is closed. Therefore, in the valve system, even if the valve system is closed, the pressure in the inlet chamber is released to the liquid chamber on the outlet chamber side. If the pressure in the inlet chamber is released to the liquid chamber on the outlet chamber side, the pressure in the inlet chamber may be reduced, and the function required for the facility including the valve system may be reduced or the function may not be realized.

  Therefore, in the valve system, the minimum passage area of the communication passage is smaller than the opening area at the outlet of the housing. Therefore, in the valve system, the flow rate of the fluid flowing from the inlet chamber to the liquid chamber on the outlet chamber side via the communication passage is limited, and the pressure drop in the inlet chamber is limited.

  Further, in any one of the above valve systems, the communication passage of the communication portion may be opened at the outlet chamber, and the inlet chamber and the outlet chamber may be communicated.

  In the valve system, one end of the communication passage opens at the inlet chamber, and the other end of the communication passage opens at the outlet chamber. That is, in the valve system, both ends of the communication passage open at the main passage in the housing. For this reason, in the said valve system, when installing the said valve system, the operation | work which connects an end to a communication part to the line connected to the said valve system can be skipped.

  Further, in any one of the above valve systems, the communication passage of the communication portion is opened by a fluid chamber connected to the outlet with a liquid chamber into which the liquid flows, and the inlet chamber and the liquid chamber May be communicated.

  In the valve system, even if it is difficult to connect the end of the communication pipe to a position where the outlet chamber is formed in the housing, gas accumulation in the inlet chamber can be suppressed.

  In the valve system having the bypass flow regulator, the bypass flow regulator may have an orifice that restricts the flow rate of the fluid flowing through the communication passage.

  In the valve system, the flow rate of the fluid flowing from the inlet chamber to the liquid chamber on the outlet chamber side can be accurately limited via the communication passage.

  Further, in any of the above valve systems having the bypass flow rate regulator, the bypass flow rate regulator may have a bypass flow rate control valve capable of changing the flow rate of the fluid flowing through the communication passage. .

  In the valve system, the flow rate of the fluid flowing from the inlet chamber to the liquid chamber on the outlet chamber side can be changed through the communication passage.

  In any of the above valve systems, the opening of the communication passage to the inlet chamber may open at the upper portion of the inlet chamber when installed.

  In each of the above valve systems including the valve system, the gas accumulated in the inlet chamber is collected in the upper part of the inlet chamber. Therefore, in the valve system, the gas accumulated in the upper part in the inlet chamber can efficiently flow into the liquid chamber on the outlet chamber side. Here, the upper portion at the time of installation in the inlet chamber means, for example, a portion in the inlet chamber above the moving range of the valve body at the time of installation of the valve system or the inlet at the time of installation of the valve system It is a part within 1/4 from the top of the vertical direction in the room.

  In the valve system according to any one of the above, the valve body is fixed to a first end portion, and the second end portion includes a valve rod penetrating the housing from the main passage to the outside, and the communication passage An opening to the inlet chamber in the opening may be open at a portion on the side where the valve rod passes through the housing with reference to the valve body in the inlet chamber.

  The valve system is generally installed with the bonnet side where the valve stem passes through the housing up. For this reason, in the valve system as the standard specification, as described above, it is preferable to open the communication passage at the bonnet side portion where the valve stem in the inlet chamber penetrates the housing.

  Further, in any one of the above-described valve systems, the communication portion may have a communication pipe in which a passage as the communication passage is formed.

  In any one of the above valve systems, when the pressure in the inlet chamber becomes equal to or higher than a predetermined pressure from the closed state in which the valve body divides the main passage into the inlet chamber and the outlet chamber, A drive may be provided to open the liquid in the inlet chamber into the outlet chamber.

  In the valve system provided with the drive device, the drive device may have an elastic member that biases the valve body from the open position to the closed position.

The fluid installation as one mode concerning the invention for achieving the above-mentioned problem is:
The valve system according to any one of the above, an operating device that operates when the hydraulic fluid as the liquid flows, a supply device that supplies the hydraulic fluid to the operating device, and the operation from the supply device An inlet line for introducing liquid from the inlet to the inlet chamber of the housing; an outlet line for directing the hydraulic fluid in the outlet chamber to the outside from the outlet of the housing; and the hydraulic fluid in the inlet line or the inlet chamber. And a supply line leading to the operating device.

  According to one aspect of the present invention, malfunction due to gas accumulation can be suppressed.

It is a sectional view of a valve system (closed state) in a first embodiment concerning the present invention. It is a sectional view of a valve system (open state) in a first embodiment concerning the present invention. It is sectional drawing of the valve system in 2nd embodiment which concerns on this invention. It is sectional drawing of the valve system in 3rd embodiment which concerns on this invention. It is sectional drawing of the valve system in 4th embodiment which concerns on this invention. It is sectional drawing of the valve system in 5th embodiment which concerns on this invention.

  Hereinafter, various embodiments of a valve system according to the present invention and a fluid facility including the same will be described in detail with reference to the drawings.

"First embodiment"
A first embodiment of a valve system and a fluid apparatus including the same according to the present invention will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 1, the fluid facility of the present embodiment includes an oil tank 1 in which hydraulic fluid (hydraulic fluid) which is a liquid is stored, and an operating device 3 which operates when hydraulic fluid is flowing. An oil pump (supply unit) 4 for supplying hydraulic oil to the operating device 3, a relief valve system (hereinafter simply referred to as a valve system) 10 for suppressing the discharge pressure of the oil pump 4 to a predetermined pressure or less The suction line 5 for leading the hydraulic oil to the oil pump 4, the inlet line 6 for leading the hydraulic oil from the oil pump 4 to the valve system 10, and the supply line 7 branched from the inlet line 6 and connected to the operating device 3 And a return line 8 for returning the hydraulic oil from the operating device 3 to the oil tank 1 and an outlet line 9 for returning the fluid containing the hydraulic oil from the valve system 10 to the oil tank 1.

  The operating device 3 is, for example, a reduction gear having a plurality of gears, a bearing device, and the like. When the operating device 3 is, for example, a reduction gear or a bearing device, the hydraulic oil is used as these lubricating oils or as their cooling medium.

  In the oil tank 1, a suction strainer 2 for removing dust and the like in the hydraulic oil is disposed. The suction line 5 connects the suction strainer 2 and the suction port of the oil pump 4. The inlet line 6 connects the outlet of the oil pump 4 and the valve system 10. The supply line 7 branches from the middle of the inlet line 6 and guides the hydraulic oil coming through the inlet line 6 to the operating device 3. The inlet line 6 and the supply line 7 are provided on the discharge side of the oil pump 4. Thus, the inlet line 6 and the supply line 7 constitute a discharge line.

  As shown in FIGS. 1 and 2, the valve system 10 includes a housing 11 in which a main passage 21 for guiding hydraulic oil from the inlet 24 to the outlet 25 is formed, and an inlet chamber 22 and an outlet chamber 23 in the main passage 21. And a communication unit 40 in which a communication passage 42 for communicating between the inlet chamber 22 and the outlet chamber 23 is formed.

  The housing 11 is formed with a housing body 12 forming a main space 26 in which the valve body 20 is accommodated and forming a part of the main passage 21, an inlet side joint portion 18 in which an inlet 24 is formed, and an outlet 25 And a partition wall 14 which forms an outlet chamber 23 connected to the outlet 25 on the inside. The partition wall portion 14 is formed in the main space 26 of the housing main body 12. In the main space 26 of the housing body 12, the outside of the partition wall portion 14 forms an inlet chamber 22. The partition wall portion 14 is formed with an opening 15 penetrating from the inner outlet chamber 23 to the outer inlet chamber 22. The edge of the opening 15 forms a valve seat 16 in contact with the valve body 20.

  The inlet side joint portion 18 is provided on the housing main body 12 and has an inlet pipe portion 18p having an inlet joint passage 28 formed therein and an inlet flange portion 18f formed on the outer periphery of the inlet pipe portion 18p. . The inlet joint passage 28 is in communication with a space inside the main space 26 of the housing body 12 and outside the dividing wall portion 14. The opening at the end of the inlet joint passage 28 constitutes the inlet 24 of the housing 11. The inlet line 6 is flanged to the inlet flange portion 18f. The aforementioned inlet chamber 22 is formed by the space inside the main space 26 of the housing body 12 and outside the partition wall 14 and the inlet joint passage 28.

  The outlet side joint portion 19 has an outlet pipe portion 19p provided in the housing body 12 and having an outlet joint passage 29 formed therein, and an outlet flange portion 19f formed on the outer periphery of the outlet pipe portion 19p. . The outlet joint passage 29 is in communication with a space inside the main space 26 of the housing body 12 and inside the dividing wall portion 14. The opening at the end of the outlet coupling passage 29 constitutes the outlet 25 of the housing 11. The outlet line 9 is flanged to the outlet flange portion 19f. The aforementioned outlet chamber 23 is formed by a space inside the main space 26 of the housing main body 12 and inside the dividing wall portion 14 and the outlet joint passage 29.

  The main passage 21 of the housing 11 is an inlet joint passage 28, a space inside the main space 26 of the housing body 12 and an outer space of the partition wall 14, and a space inside the main space 26 of the housing body 12. And the outlet joint passage 29.

  Here, as shown in FIG. 1, the valve body 20 is in contact with the valve seat 16, and the state in which the inside of the main passage 21 is divided into the inlet chamber 22 and the outlet chamber 23 is in a closed state. Further, as shown in FIG. 2, the valve body 20 is separated from the valve seat 16, and the operating oil in the inlet chamber 22 can flow into the outlet chamber 23 in an open state. The drive device 30 moves the valve body 20 between the position of the valve body 20 which can realize the closed state and the position of the valve body 20 which can realize the open state.

  The driving device 30 contacts the valve rod 31 extending in the moving direction of the valve body 20, the piston 32 fixed to the end of the valve rod 31, and the piston 32 to open the valve body 20 from the open position to the closed position. Position of spring (elastic member) 33, spring seat 34 for receiving spring 33, spring cap 35 for housing piston 32, spring 33 and spring seat 34, and spring seat 34 are adjusted And a biasing force regulator 36.

  A valve body 20 is fixed to one end of the valve rod 31. The other end of the valve rod 31 penetrates the housing 11 from the inside and is exposed to the outside of the housing 11. The piston 32 is fixed to the other end of the valve rod 31. Thus, the piston 32 is disposed outside the housing 11. The spring seat 34 is disposed on the opposite side of the valve body 20 with respect to the piston 32. A spring 33 is disposed between the piston 32 and the spring seat 34 in a compressed state. The biasing force adjuster 36 adjusts the relative position of the spring seat 34 in the moving direction of the valve body 20 with respect to the spring cap 35.

  In the main space 26 of the housing 11, a valve rod supporting portion 13 is formed to support an intermediate position of the valve rod 31 so that the valve rod 31 can move in the moving direction of the valve body 20. In FIG. 1 and FIG. 2, the main space 26 is drawn so as to be completely divided into a space on the valve body 20 side and a bonnet space 27 on the spring seat 34 side with reference to the valve rod support 13. . However, in practice, the space on the valve body 20 side and the bonnet space 27 on the spring seat 34 side communicate with each other. For this reason, the bonnet space 27 constitutes a part of the inlet chamber 22.

  The communication unit 40 has a communication pipe 41. One end of the communication pipe 41 is connected to a position where a bonnet space 27 is formed in the housing main body 12. In addition, the other end of the communication pipe 41 is connected to the outlet flange portion 19 f. The housing main body 12 is formed with a through hole 43 penetrating from the bonnet space 27 into the passage of the communication pipe 41. Further, a through hole 44 is formed in the outlet flange portion 19 f so as to penetrate from the inside of the outlet joint passage 29 into the passage of the communication pipe 41. Therefore, the inlet chamber 22 of the housing 11 and the outlet chamber 23 of the housing 11 are formed by the communication passage 42 formed by the through hole 43 of the housing body 12, the passage of the communication pipe 41 and the through hole 44 of the outlet flange portion 19f. It is in communication.

  The minimum passage area Smin of the communication passage 42 is smaller than the opening area So at the outlet 25 of the housing 11 and the minimum passage area in the main passage 21 of the housing 11. The passage area of the communication passage 42 at each position in the direction in which the communication passage 42 extends is basically the same in the present embodiment. Therefore, the passage area of the communication passage 42 at each position in the direction in which the communication passage 42 extends is basically referred to as the minimum passage area Smin of the communication passage 42.

  When connecting the housing 11 in the valve system 10 of this embodiment to the inlet line 6 and the outlet line 9, the housing 11 is installed so that the bonnet space 27 may be located above with respect to the valve body 20.

  Before the oil pump 4 is driven, the valve body 20 of the valve system 10 is in the closed position by the biasing force of the spring 33, as shown in FIG. Therefore, before the oil pump 4 is driven, the valve system 20 divides the inside of the main passage 21 of the housing 11 into the inlet chamber 22 and the outlet chamber 23 by the valve body 20. When the oil pump 4 is driven, the hydraulic oil in the oil tank 1 flows into the oil pump 4 through the suction strainer 2 and the suction line 5. The oil pump 4 supplies the hydraulic oil to the inlet chamber 22 of the valve system 10 through the inlet line 6 and supplies the hydraulic oil to the operating device 3 through the inlet line 6 and the supply line 7. The hydraulic oil supplied to the operating device 3 returns into the oil tank 1 through the return line 8.

  When the valve system 10 is closed, the hydraulic fluid in the inlet chamber 22 of the housing 11 does not substantially flow into the outlet chamber 23. When the pressure in the inlet chamber 22 increases and the pressure in the inlet chamber 22 reaches a predetermined pressure that overcomes the biasing force of the spring 33, the valve body 20 moves from the closed position to the open position, as shown in FIG. The valve system 10 is then opened. When the valve system 10 is opened, the hydraulic fluid in the inlet chamber 22 of the housing 11 flows into the outlet chamber 23. This hydraulic oil returns to the oil tank 1 through the outlet line 9.

  As described above, in the present embodiment, when the pressure in the inlet chamber 22, that is, the discharge pressure of the oil pump 4 becomes equal to or higher than a predetermined pressure, the valve system 10 is opened and the hydraulic oil in the inlet chamber 22 is discharged. Since the chamber 23 is released, the discharge pressure of the oil pump 4 can be suppressed to a predetermined pressure or less.

  In the present embodiment, by adjusting the relative position of the spring seat 34 to the spring cap 35 by operating the biasing force adjuster 36, it is possible to adjust the biasing force of the spring 33 to the valve body 20. Therefore, by operating the biasing force regulator 36, the predetermined pressure at which the valve system 10 switches from the closed state to the open state can be changed.

  In the hydraulic oil, gas such as air may be mixed. If this gas accumulates in the inlet chamber 22 of the valve system 10, the valve system 10 may become inoperable.

  In the present embodiment, even if the valve system 10 is in the closed state, since the inlet chamber 22 and the outlet chamber 23 of the housing 11 communicate with each other by the communication passage 42 of the communication unit 40, the fluid in the inlet chamber 22 is It flows into the outlet chamber 23. For example, for this reason, for example, when the valve system 10 is closed and there is no gas in the inlet chamber 22 and filled with the hydraulic fluid, the hydraulic fluid passes through the communication passage 42 and the outlet chamber 23. Flow into When the valve system 10 is closed and hydraulic fluid and gas are accumulated in the inlet chamber 22, this gas, or the gas and hydraulic fluid may flow to the outlet chamber 23 through the communication passage 42. To flow. The hydraulic oil and gas flowing into the outlet chamber 23 return to the oil tank 1 through the outlet line 9. In particular, in the present embodiment, in the installed state of the valve system 10, the opening for the inlet chamber 22 in the communication passage 42 is formed in the upper portion in the inlet chamber 22, so the gas accumulated in the upper portion in the inlet chamber 22 is efficient. Can flow into the outlet chamber 23. The air returned to the oil tank 1 escapes from the hydraulic oil.

  Therefore, in the present embodiment, the gas accumulation in the inlet chamber 22 can be suppressed, and as a result, the malfunction of the valve system 10 due to the gas accumulation can be suppressed.

  In the present embodiment, as described above, the fluid in the inlet chamber 22 flows into the outlet chamber 23 even when the valve system 10 is in the closed state. Therefore, in the present embodiment, even when the valve system 10 is in the closed state, the pressure in the inlet chamber 22 is released to the outlet chamber 23. When the pressure in the inlet chamber 22 is released to the outlet chamber 23, the pressure in the inlet chamber 22, that is, the discharge pressure of the oil pump 4 decreases, and in an extreme case, the oil pressure is higher than the pressure of the operating oil at which the working device 3 can operate normally. The discharge pressure of the pump 4 can be low.

  Therefore, in the present embodiment, the minimum passage area Smin of the communication passage 42 is smaller than the opening area So at the outlet 25 of the housing 11. For this reason, in the present embodiment, the flow rate of the fluid flowing from the inlet chamber 22 to the outlet chamber 23 via the communication passage 42 is limited, and the pressure drop in the inlet chamber 22 is limited.

  That is, in the present embodiment, by making the inlet chamber 22 and the outlet chamber 23 communicate with each other by the communication passage 42, the inlet chamber 22 and the outlet chamber 23 can be connected by the communication passage 42 while suppressing gas accumulation in the inlet chamber 22. The inconvenience caused by the communication is also suppressed.

"2nd embodiment"
A second embodiment of a valve system and a fluid facility including the same according to the present invention will be described with reference to FIG.

  The fluid system of the present embodiment is the same as the fluid system of the first embodiment except that the valve system 10a is different from the valve system 10 of the first embodiment.

  The valve system 10a of this embodiment is obtained by adding an orifice 45 for restricting the flow rate of fluid through the communication passage 42 to the valve system 10 of the first embodiment. The orifice 45 is provided in the communication pipe 41. Thus, the communication portion 40 a of the present embodiment includes the communication pipe 41 and the orifice 45. The orifice 45 has an opening formed in the plate through the plate.

  In the present embodiment, by providing the orifice 45 in the communication pipe 41, the flow rate of the fluid flowing from the inlet chamber 22 into the outlet chamber 23 through the communication passage 42 can be more accurately restricted than in the first embodiment. The pressure drop in the inlet chamber 22 can be precisely limited.

  Therefore, in the present embodiment, the inconvenience caused by connecting the inlet chamber 22 and the outlet chamber 23 with the communication passage 42 can be suppressed as compared with the first embodiment.

"Third embodiment"
A third embodiment of a valve system and a fluid facility including the same according to the present invention will be described with reference to FIG.

  The fluid system of the present embodiment is the same as the fluid system of the second embodiment except that the valve system 10b is different from the valve system 10a of the second embodiment.

  The valve system 10b of this embodiment is obtained by adding a bypass flow control valve 46 capable of changing the flow rate of fluid passing through the communication passage 42 to the valve system 10a of the second embodiment. The bypass flow control valve 46 is provided in the communication pipe 41. Thus, the communication portion 40 b of the present embodiment includes the communication pipe 41, the orifice 45, and the bypass flow control valve 46.

  In the present embodiment, when a certain condition is satisfied, a worker or the like operates the bypass flow control valve 46 to open the bypass flow control valve 46 from closing. Here, certain conditions are conditions under which it is assumed that a predetermined amount or more of gas has accumulated in the inlet chamber 22. Specifically, a certain condition is, for example, whether or not the continuous operation time of the oil pump 4 has reached a predetermined time.

  Thus, by providing the bypass flow control valve 46 and operating the bypass flow control valve 46 as described above, while the bypass flow control valve 46 is closed, the communication passage 42 is provided. Can be avoided.

  In the present embodiment, although the orifice 45 and the bypass flow control valve 46 are provided as the bypass flow control unit, when the bypass flow control valve 46 is provided, the orifice 45 may not be provided. Thus, when the bypass flow control valve 46 is provided and the orifice 45 is not provided, when the bypass flow control valve 46 is opened, the valve opening degree is appropriately adjusted to pass through the communication passage 42 and the inlet chamber 22 to the outlet chamber Restrict the flow rate of the fluid flowing into 23 to the target flow rate. That is, in this case, in addition to the opening / closing function of the communication passage 42, the bypass flow rate adjusting valve 46 may also have the same function as the orifice 45.

"4th embodiment"
A fourth embodiment of a valve system and a fluid apparatus including the valve system according to the present invention will be described with reference to FIG.

  In the valve system of each of the above embodiments, there is a communication portion which is opened at the inlet chamber 22 and is opened at the outlet chamber 23 and a communication passage 42 for communicating the inlet chamber 22 and the outlet chamber 23 is formed. doing. The valve system 10c of this embodiment is a modified example of this communication part.

  The communication part 40c of the present embodiment also has the communication pipe 41c as in the above embodiments. One end of the communication pipe 41c is connected to a position where the bonnet space 27 is formed in the housing main body 12 as in the above embodiments. Further, the other end of the communication pipe 41 c is connected to the outlet line 9. As in the above embodiments, the housing main body 12 is formed with a through hole 43 which penetrates from the bonnet space 27 into the passage in the communication pipe 41 c. Further, the outlet line 9 is formed with a through hole 44c for forming the outlet line 9 from the inside of the pipe passage 9c to the inside of the communication pipe 41c. Therefore, the inlet chamber 22 of the housing 11 and the passage of the outlet line 9 communicate with each other by the communication passage 42 c formed by the through hole 43 of the housing main body 12, the passage of the communication pipe 41 c and the through hole 44 c of the outlet line 9. doing.

  In this embodiment, even if the valve system 10c is in the closed state, the inlet chamber 22 of the housing 11 and the passage 9c of the outlet line 9 communicate with each other by the communication passage 42c of the communication portion 40c. Fluid flows into the passage 9 c of the outlet line 9. Therefore, also in the present embodiment, it is possible to suppress the malfunction of the valve system 10c due to the gas accumulation in the inlet chamber 22.

  That is, if the communication passage 42 c is opened at the inlet chamber 22 of the housing 11, the communication passage 42 c does not need to be opened at the outlet chamber 23, and communicates with the liquid chamber on the outlet chamber 23 side based on the valve body 20. It should just be. The liquid chamber on the outlet chamber 23 side is a chamber into which the hydraulic oil flows in the fluid device including the inside of the tank connected to the passage 9 c of the outlet line 9 and the outlet line 9 in addition to the outlet chamber 23.

  If it is difficult to connect the end of the communication pipe to the position where the outlet chamber 23 is formed in the housing 11 because the housing 11 of the valve system 10 c is small, etc., as in the present embodiment The end of the communication pipe 41 c may be connected to a fluid device including the outlet line 9 and a tank connected to the outlet line 9.

  However, in the present embodiment, when installing the valve system 10c, an operation of connecting the end of the communication pipe 41c to the outlet line 9 occurs. On the other hand, in each of the embodiments described above, since each of both ends of the communication pipe 41 is connected to the housing 11 of the valve system, when the valve system is installed, the other end of the communication pipe 41 is outlet The work of connecting to the line 9 can be omitted. For this reason, as described above, basically, when there is no special reason such as it is difficult to connect the end of the communication pipe 41c to the position where the outlet chamber 23 is formed in the housing 11 internally, Preferably, each end of the communication pipe 41 is connected to the housing 11 of the valve system.

  In addition, although this embodiment deform | transforms the communication part 40 of 1st embodiment, the communication part of the below-mentioned 5th embodiment is carried out further the communication part of 2nd embodiment and 3rd embodiment. You may deform | transform like a form.

"Fifth embodiment"
A fifth embodiment of a valve system and a fluid apparatus including the same according to the present invention will be described with reference to FIG.

  The housing 11 d in the valve system 10 d of the present embodiment is obtained by adding a through hole joint portion 59 in which the through hole 54 is formed to the housing main body 12 of the first embodiment. The through hole joint portion 59 has a pipe portion 59p in which the through hole joint passage 58 is formed, and a flange portion 59f formed on the outer periphery of the pipe portion 59p. The through hole coupling passage 58 is in communication with a space inside the main space 26 of the housing body 12 and outside the partition wall portion 14.

  The main passage 21 d of the housing 11 d of the present embodiment is the inlet joint passage 28, the space inside the main space 26 of the housing main body 12 and the space outside the partition wall 14, and the main space 26 of the housing main body 12 An inner space of the partition wall portion 14, an outlet joint passage 29, and a slip-through joint passage 58 are formed. Further, the inlet chamber 22 d is formed by the inlet joint passage 28, the space inside the main space 26 of the housing body 12 and the outer side of the partition wall 14, and the slip-through joint passage 58. Further, the outlet chamber 23 is formed by the space outside the partition wall 14 in the main space 26 of the housing main body 12 and the outlet joint passage 29 as in the above embodiments.

  In the present embodiment, the fluid flowing from the inlet 24 into the inlet chamber 22d in the main passage 21d flows out from the through hole 54 even when the valve body 20 is in the closed state. That is, in the valve system 10d, even when the valve system 10d is in the closed state, the fluid flowing into the housing 11d from the inlet 24 slips through the inside of the housing 11d.

  The supply line 7 d is flange-connected to the flange portion 59 f of the through hole coupling portion 59. An inlet line 6 d is flange-connected to the inlet flange portion 18 f as in the first embodiment. However, the supply line 7 is not branched midway along the inlet line 6d as in the first embodiment. That is, in the first embodiment described with reference to FIGS. 1 and 2, the main passage 21d of the valve system 10d according to this embodiment forms the flow passage of the portion where the supply line 7 branches in the inlet line 6. doing.

  As described above, in addition to the inlet 24 and the outlet 25, other openings may be formed in the housing, such as the through holes 54, to be connected to any line.

  Although the present embodiment is a modification of the first embodiment, the second to fourth embodiments may be modified in the same manner as the present embodiment.

"Modification"
In the first, second, third and fifth embodiments, the communication pipe 41 is connected to the outlet flange 19f. However, in the case where the inlet chamber and the outlet chamber communicate with each other at the communication portion, the communication pipe may be connected to a position where the outlet chamber 23 is formed in the housing main body 12.

  In the above embodiments, the communication passage is in communication with the bonnet space 27 in the inlet chamber. However, the communication passage may be in communication with another space portion in the inlet chamber. For example, when it is assumed that the inlet 24 side is up when the valve system is installed, the communication passage may be communicated with the space portion on the inlet 24 side in the inlet chamber. Further, when it is assumed that the outlet 25 side is up in the installed state of the valve system, the communication passage may be communicated with the space portion on the outlet 25 side in the inlet chamber. However, since the valve system is generally installed so that the bonnet space 27 side is on the upper side, in the valve system as a standard specification, it is preferable to make the communication passage communicate with the bonnet space 27 in the inlet chamber .

  In each of the above embodiments, the valve system and the line are flanged. However, the valve system and the line may be connected in other ways, such as, for example, a screw connection or a weld connection.

  In each of the above embodiments, the biasing force of the spring 33 is used as the movement driving force of the valve body 20. However, an electromagnetic force, an air pressure or the like may be used as the movement driving force of the valve body 20. As described above, when electromagnetic force or air pressure is used as the movement driving force of the valve body 20, change of the predetermined pressure at which the valve system switches from the closed state to the open state can be easily controlled from a remote place.

  In each of the above embodiments, the tank in which the hydraulic oil sucked by the oil pump 4 is stored, the tank in which the hydraulic oil from the operating device 3 is stored, and the tank in which the hydraulic oil from the outlet line 9 is stored are the same tank. It is. However, these tanks may be different from each other.

  In the above embodiments, the fluid flowing into the valve system is hydraulic oil. However, the fluid flowing into the valve system may be any liquid, such as water, as long as it can be mixed with gas.

  1: Oil tank, 2: Suction strainer, 3: Operating device, 4: Oil pump (supply device), 5: Suction line, 6, 6 d: Inlet line, 7, 7 d: Supply line, 8: Return line, 9: Outlet line 10, 10a, 10b, 10c, 10d: relief valve system (or simply valve system) 11, 11d: housing, 12: housing body, 13: valve stem support, 15: opening, 16: valve seat , 18: inlet side joint portion, 18p: inlet pipe portion, 18f: inlet flange portion, 19: outlet side joint portion, 19p: outlet pipe portion, 19f: outlet flange portion, 20: valve body, 21, 21d: main passage 22, 22d: inlet chamber, 23: outlet chamber, 24: inlet, 25: outlet, 26: main space, 27: bonnet space, 28: inlet joint passage, 29: outlet joint passage, 30: driving device, 31: Stem, 3 : Piston, 33: Spring (elastic member), 34: Spring seat, 35: Spring cap, 36: Bias regulator, 40, 40a, 40b, 40c: Communication part, 41, 41c: Communication piping, 42, 42c : Communication passage, 43, 44, 44c: Through hole, 45: Orifice (bypass flow rate regulator), 46: Bypass flow rate control valve (bypass flow rate regulator), 54: Slip opening, 58: Slip opening joint passage, 59: Slip-through port side joint part, 59p: pipe part, 59f: flange part

Claims (14)

A housing having a main passage formed therein for conducting liquid from the inlet to the outlet;
A valve element disposed in the main passage of the housing and capable of dividing the inside of the main passage into an inlet chamber on the inlet side and an outlet chamber on the outlet side;
A communication portion that is open at the inlet chamber and in which a communication passage is provided to communicate between the liquid chamber on the outlet chamber side and the inlet chamber with reference to the valve body;
Equipped with
The communication portion has a bypass flow rate regulator that regulates the flow rate of fluid flowing through the communication path,
The communication passage of the communication portion is a fluidic device connected to the outlet, which is opened by a liquid chamber into which the liquid flows, and causes the inlet chamber and the liquid chamber to communicate with each other.
Valve system. A housing having a main passage formed therein for conducting liquid from the inlet to the outlet;
A valve element disposed in the main passage of the housing and capable of dividing the inside of the main passage into an inlet chamber on the inlet side and an outlet chamber on the outlet side;
A communication portion that is open at the inlet chamber and in which a communication passage is provided to communicate between the liquid chamber on the outlet chamber side and the inlet chamber with reference to the valve body;
Equipped with
The communication portion has a bypass flow rate regulator that regulates the flow rate of fluid flowing through the communication path,
The valve body is fixed to the first end, and the second end includes the valve rod penetrating the housing from the main passage to the outside;
The opening to the inlet chamber in the communication passage is open at a position on the position where the valve rod passes through the housing with reference to the valve body in the inlet chamber.
Valve system. A housing having a main passage formed therein for conducting liquid from the inlet to the outlet;
A valve element disposed in the main passage of the housing and capable of dividing the inside of the main passage into an inlet chamber on the inlet side and an outlet chamber on the outlet side;
A communication portion that is open at the inlet chamber and in which a communication passage is provided to communicate between the liquid chamber on the outlet chamber side and the inlet chamber with reference to the valve body;
Equipped with
The communication portion has a bypass flow rate regulator that regulates the flow rate of fluid flowing through the communication path,
From the closed state where the valve body divides the main passage into the inlet chamber and the outlet chamber, when the pressure in the inlet chamber reaches a predetermined pressure or more, the liquid in the inlet chamber is in the outlet chamber. With an open drive to flow into the
Valve system. The valve system according to any one of claims 1 to 3 .
The minimum passage area of the communication passage is smaller than the opening area of the outlet,
Valve system. The valve system according to any one of claims 1 to 4 .
The communication passage of the communication portion is opened at the outlet chamber to connect the inlet chamber and the outlet chamber.
Valve system. In the valve system according to claim 2 or 3 ,
The communication passage of the communication portion is a fluidic device connected to the outlet, which is opened by a liquid chamber into which the liquid flows, and causes the inlet chamber and the liquid chamber to communicate with each other.
Valve system. The valve system according to any one of claims 1 to 6 .
The bypass flow regulator has an orifice for limiting the flow rate of fluid flowing through the communication passage.
Valve system. The valve system according to any one of claims 1 to 7 .
The bypass flow regulator has a bypass flow control valve capable of changing the flow rate of the fluid flowing through the communication passage.
Valve system. A valve system according to any one of the preceding claims .
The opening to the inlet chamber in the communication passage is open at the upper portion at the time of installation in the inlet chamber,
Valve system. In the valve system according to claim 1 or 3 ,
The valve body is fixed to the first end, and the second end includes the valve rod penetrating the housing from the main passage to the outside;
The opening to the inlet chamber in the communication passage is open at a position on the position where the valve rod passes through the housing with reference to the valve body in the inlet chamber.
Valve system. In the valve system according to any one of claims 1 or et 10,
The communication portion has a communication pipe in which a passage as the communication path is formed,
Valve system. In the valve system of claim 1 or 2 ,
From the closed state where the valve body divides the main passage into the inlet chamber and the outlet chamber, when the pressure in the inlet chamber reaches a predetermined pressure or more, the liquid in the inlet chamber is in the outlet chamber. With an open drive to flow into the
Valve system. In the valve system according to claim 3 or 12 ,
The drive device has an elastic member that biases the valve body from the open position to the closed position.
Valve system. A valve system according to any one of claims 1 or et 13,
An operating device that operates when hydraulic fluid, which is the liquid, is flowing;
A supply for supplying the hydraulic fluid to the operating device;
An inlet line for conducting the hydraulic fluid from the feeder from the inlet of the housing into the inlet chamber;
An outlet line for conducting the hydraulic fluid in the outlet chamber from the outlet of the housing to the outside;
A supply line for leading the hydraulic fluid in the inlet line or the inlet chamber to the actuating device;
Fluid equipment comprising:

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