JP2017051882A - Filter fitting structure and pressure regulating valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter fitting structure and a pressure regulating valve capable of suppressing the flowing out of foreign matter to a downstream side.SOLUTION: In one embodiment of the present invention, an introduction part 5 has: a block member 100 with the introduction port 81a of a fuel gas G; a cylindrical filter 30 with a bottom covering the introduction port 81a; and an O-ring 104 disposed between the filter 30 and the block member 100. As another embodiment of the present invention, a multistage pressure regulating valve 10 has: the introduction part 5; an upstream pressure regulating valve 1 regulating the pressure of the fuel gas G introduced from the introduction port 81a; a downstream pressure regulating valve 2; and a middle passage 3 and the like.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a filter mounting structure to which a filter that prevents entry of foreign matter is attached, and a pressure regulating valve having the filter mounting structure.

  Patent Document 1 discloses an LPG regulator including a filter that covers a slow fuel passage connected to an inlet for introducing LPG fuel, and an elastic member that biases the filter.

JP 2000-192856 A

  In the LPG regulator disclosed in Patent Document 1, foreign matter may not flow through the filter, and may flow out downstream through a gap formed between the filter and the filter housing.

  Therefore, the present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a filter mounting structure and a pressure regulating valve that can prevent foreign matters from flowing out downstream.

  One aspect of the present invention made to solve the above-described problems is that, in a filter mounting structure, a body portion having a fluid inlet, a bottomed cylindrical filter that covers the inlet, the filter, and the body portion And a seal member provided between the two.

  According to this aspect, the gap between the filter and the body part is sealed by the sealing member. For this reason, it is difficult for foreign matter to flow out from between the filter and the body part to the downstream side. Therefore, it is suppressed that a foreign material flows out downstream from the filter.

  In the above aspect, it is preferable that the body portion includes a groove portion for attaching the filter, and the seal member is provided in the groove portion.

  According to this aspect, the positional displacement of the seal member is prevented and the positioning of the seal member is simplified. Further, since the foreign matter cannot flow out to the downstream side unless the U-turn flows in the groove portion, the foreign matter is more effectively suppressed from flowing out to the downstream side than the filter.

  In said aspect, it is preferable that the said filter is provided with the collar part extended outside from the outer peripheral surface of the said filter.

  According to this aspect, even if the foreign material flows into the vicinity of the introduction port, it hits the buttocks and stays there. This makes it difficult for foreign matter to flow out more effectively from between the filter and the body part to the downstream side. Therefore, it is possible to more effectively prevent foreign matter from flowing out downstream of the filter.

  In said aspect, it is preferable to have an urging member for urging the filter toward the inlet.

  According to this aspect, the sealing performance by the sealing member is improved. Therefore, the filter and the body part are more effectively sealed by the seal member.

  Another aspect of the present invention made to solve the above-described problems is that, in a pressure regulating valve, a body portion having a fluid inlet, a bottomed cylindrical filter covering the inlet, the filter, and the body A filter mounting structure including a seal member provided between the inlet and the pressure member, and a pressure adjusting unit that adjusts the pressure of the fluid introduced from the inlet.

  According to this aspect, the gap between the filter and the body part is sealed by the sealing member. For this reason, it is difficult for foreign matter to flow out from between the filter and the body part to the downstream side. Therefore, it is suppressed that a foreign material flows out downstream from the filter.

  According to the filter mounting structure and the pressure regulating valve of the present invention, it is possible to suppress foreign matters from flowing out to the downstream side.

It is sectional drawing of the multistage pressure regulating valve of this embodiment. It is detailed sectional drawing of the plug vicinity in the filter attachment structure of 1st Example. It is detailed sectional drawing of the plug vicinity in the filter attachment structure of 2nd Example. It is detailed sectional drawing of the plug vicinity in the filter attachment structure of 3rd Example. It is detailed sectional drawing of the plug vicinity in the filter attachment structure of a 1st modification. It is detailed sectional drawing of the plug vicinity in the filter attachment structure of a 2nd modification.

[First embodiment]
<Configuration of multistage pressure regulating valve>
First, the structure of the multistage pressure regulating valve 10 of this embodiment will be described. A multistage pressure adjusting valve 10 shown in FIG. 1 is a pressure adjusting valve that adjusts the fuel gas G to a desired pressure while reducing the pressure in multiple stages. The multistage pressure regulating valve 10 includes an upstream pressure regulating valve 1, a downstream pressure regulating valve 2, an intermediate passage 3, a check valve 4, an introduction part 5 and the like. The multistage pressure regulating valve 10 has a body member 7 made of aluminum alloy. The body member 7 is formed with a part of the upstream pressure regulating valve 1, a downstream pressure regulating valve 2, an intermediate passage 3, and a check valve 4. The upstream pressure regulating valve 1, the downstream pressure regulating valve 2, the middle passage 3, and the like are pressure regulating units that regulate the pressure of the fuel gas G introduced from an introduction port 81a (see FIG. 2) described later.

  The upstream pressure regulating valve 1 is arranged at a position upstream of the downstream pressure regulating valve 2 in the flow direction of the fuel gas G (the direction of the arrow shown in FIG. 1) (hereinafter simply referred to as “upstream side”). Yes. The downstream pressure regulating valve 2 is disposed at a position downstream of the upstream pressure regulating valve 1 in the flow direction of the fuel gas G (hereinafter simply referred to as “downstream side”). Such an upstream pressure regulating valve 1 and a downstream pressure regulating valve 2 are connected in series via an intermediate passage 3. The middle passage 3 is a passage through which the fuel gas G flows after being decompressed by the upstream pressure regulating valve 1 and before decompressing by the downstream pressure regulating valve 2. The check valve 4 is connected to the middle passage 3 and controls the pressure in the middle passage 3 to be lower than a predetermined set pressure. The introduction part 5 is a part that is arranged at a position upstream of the upstream pressure regulating valve 1 and into which the fuel gas G is introduced into the multistage pressure regulating valve 10.

  The fuel gas G is, for example, hydrogen gas supplied to a fuel cell (not shown). A main stop valve (not shown) for supplying or stopping the fuel gas G stored in a fuel tank (not shown) is connected to the upstream side of the multistage pressure regulating valve 10. Further, an injector (not shown) that supplies the fuel cell with fuel gas G adjusted to a desired pressure is connected to the downstream side of the multistage pressure regulating valve 10. The fuel gas G stored in the fuel tank may be filled at a pressure of about 80 to 90 MPa depending on the filling equipment. On the other hand, the pressure of the fuel gas G supplied from the multistage pressure regulating valve 10 to the injector is reduced to a pressure of about 1.0 to 1.5 MPa. Therefore, the multistage pressure regulating valve 10 depressurizes the fuel gas G from about 80 to 90 MPa to about 3.0 to 5.0 MPa by the upstream pressure regulating valve 1 and about 3 to about 3.0 to 5.0 MPa, for example. The pressure is reduced from about 3.0 to 5.0 MPa to about 1.0 to 1.5 MPa.

(Upstream pressure regulating valve)
The upstream pressure regulating valve 1 includes a pressure regulating chamber 11, a valve chamber 12, a valve body 13 (valve), a valve seat 14, a piston 15, a coil spring 16, a holding member 17, a stop member 18, and the like. I have.

  The pressure regulating chamber 11 is formed at a position below the valve seat 14 (a direction on the downstream side with respect to the valve seat 14), and when the valve body 13 moves upward (a direction opposite to the valve seat 14). It communicates with the valve chamber 12. The valve chamber 12 communicates with the inlet 8. The valve body 13 moves up and down in the valve chamber 12. The valve seat 14 is formed at the lower end of the valve chamber 12 and abuts and separates from the valve body 13. The piston 15 is arranged at the tip of the urging direction of the valve spring 133 with respect to the valve body 13 and moves up and down in the pressure regulating chamber 11. The coil spring 16 urges the piston 15 upward (in the direction toward the valve body 13). The holding member 17 is in contact with the lower end of the coil spring 16 and holds the coil spring 16. The stop member 18 is screwed to the body member 7 in a state where the height of the holding member 17 can be adjusted.

  Between the valve chamber 12 and the valve body 13, a valve spring 133 that biases the valve body 13 downward (in the direction toward the valve seat 14) is disposed. The valve body 13 includes a cylindrical main body portion 134, a conical tapered portion 132, and a needle-like needle portion 131. A valve spring 133 is attached to the main body 134. The tapered portion 132 is formed below the main body portion 134 (in the direction toward the valve seat 14), and is a portion that contacts the valve seat 14. The needle portion 131 is formed below the taper portion 132 (in the direction toward the piston 15), and extends through the through hole 141 formed in the valve seat 14 to the pressure regulating chamber 11. The lower end of the needle portion 131 is in contact with the distal end surface 153a of the protrusion 153 provided in a state of protruding from the upper end of the main body 150 of the piston 15 (end on the valve body 13 side). The main body 150 is formed in a substantially cylindrical shape.

  The valve body 13 is provided with annular sliding members 135a and 135b. The valve body 13 is disposed in the valve chamber 12 with these sliding members 135 a and 135 b in contact with the inner peripheral surface of the valve chamber 12. Thereby, the sliding members 135a and 135b and the inner peripheral surface of the valve chamber 12 slide and the valve body 13 tilts without the outer peripheral surface of the valve body 13 contacting the inner peripheral surface of the valve chamber 12. Instead, the valve chamber 12 is moved up and down. As the sliding members 135a and 135b, for example, a resin material such as PTFE can be used.

  Further, the valve body 13 includes a portion formed at a position upstream of the valve body 13 in the valve chamber 12 and a portion formed at a position downstream of the valve body 13 in the valve chamber 12. An internal passage 136 for communication is formed.

  An annular seal member 151 that contacts the inner peripheral surface of the pressure regulating chamber 11 and seals the pressure regulating chamber 11 is disposed on the outer circumferential surface of the main body 150 of the piston 15. The annular seal member 151 has a lip-shaped cross section that opens upward (in the direction of the pressure regulating chamber 11 side) in a V shape. A spring seat 154 that holds the coil spring 16 is formed in a concave shape at the lower end of the piston 15. A sliding member 152 made of fluororesin is mounted on the outer peripheral surface of the spring seat 154.

  Further, as shown in FIG. 1, the filter member 19 is locked to the stop member 18. The pressure regulating chamber 11 communicates with the valve chamber 22 of the downstream pressure regulating valve 2 through the middle passage 3 as will be described later.

(Downstream pressure regulating valve)
The downstream pressure regulating valve 2 includes a pressure regulating chamber 21, a valve chamber 22, a piston 24, a valve body 241, a coil spring 25, a valve seat 26, a stop member 27, an adjusting screw 28, and the like. .

  The pressure regulating chamber 21 communicates with the outlet 6 formed in the body member 7. The valve chamber 22 is formed at a position below the pressure regulating chamber 21 (upstream with respect to the pressure regulating chamber 21). The piston 24 moves up and down in the pressure regulating chamber 21. The valve body 241 is formed in a substantially cylindrical shape, and is provided up to the valve chamber 22 along the central axis direction of the piston 24. The coil spring 25 urges the piston 24 upward (in the direction toward the lid member 23). The valve seat 26 is formed at the lower end of the valve chamber 22, and the lower end portion 2414 of the valve body 241 contacts and separates. The stop member 27 is fitted into the body member 7 at the position of the lower right end of the body member 7. A valve seat 26 is fitted inside the inner peripheral surface of the stop member 27. The adjustment screw 28 is screwed into the inner peripheral surface of the stop member 27 and attached. The height of the valve seat 26 can be adjusted by the adjusting screw 28.

  The pressure regulating chamber 21 is sealed by a lid member 23 that is fitted in the body member 7. Below the lid member 23 (in the direction toward the piston 24), a cylindrical convex portion 231 is formed that contacts the upper end portion of the piston 24 and restricts the upward movement of the piston 24. When the columnar convex portion 231 comes into contact with the upper end portion of the piston 24, an annular space is formed in the pressure regulating chamber 21. Between the pressure regulating chamber 21 and the outlet 6, an outlet passage 61 that communicates both is formed horizontally.

  A cylindrical through hole 2411 is formed from the upper end portion of the piston 24 to the lower end portion of the valve body 241 at the axial center of the piston 24 and the valve body 241. An annular seal member 242 that contacts the inner circumferential surface of the pressure regulating chamber 21 and seals the pressure regulating chamber 21 is disposed on the outer circumferential surface of the main body portion of the piston 24. The annular seal member 242 has a lip-shaped cross section that opens upward in a V shape. A spring seat 246 that holds the coil spring 25 is formed in a concave shape at the lower end of the piston 24. The coil spring 25 is a cylindrical compression spring. The position of the lower end of the coil spring 25 is regulated by a holding portion 247 formed integrally with the body member 7.

  An annular seal member 243 that seals the valve chamber 22 in contact with the outer peripheral surface of the valve body 241 is disposed below the holding portion 247. The annular seal member 243 has a lip-shaped cross section that opens downward (in the direction toward the valve chamber 22) in a V shape. A bearing portion 245 that supports the valve body 241 so as to be movable in the vertical direction is mounted below the annular seal member 243. The bearing portion 245 also serves as a drop stopper for the annular seal member 243. The valve chamber 22 is formed in a substantially cylindrical shape below the bearing portion 245.

(Middle aisle)
The middle passage 3 is formed linearly between the pressure regulating chamber 11 of the upstream pressure regulating valve 1 and the valve chamber 22 of the downstream pressure regulating valve 2. The middle passage 3 is formed with the same inner diameter throughout. The body member 7 is formed with a middle passage machining hole 72 for machining the middle passage 3. A sealing member 9 is sealed to the outer wall surface 71 of the body member 7 to seal the middle passage processing hole 72. A check valve 4 described later is provided above the middle passage 3.

  Between the middle passage 3 and the check valve 4, a check valve inlet passage 52 that allows the middle passage 3 and the check valve 4 to communicate with each other is formed in the vertical direction. Further, a trap passage 32 branched from the middle passage 3 is formed.

(Check valve)
The check valve 4 includes a valve chamber 41, an inlet portion 42 of the valve chamber 41, a valve body 43 that is accommodated in the valve chamber 41 and contacts and separates from the inlet portion 42, and the valve body 43 is attached to the inlet portion 42. A pressing spring 44 is provided, and a holding member 46 that holds the pressing spring 44 is provided. A check valve outlet space 50 and a check valve outlet passage 51 are formed between the valve chamber 41 and the pressure regulating chamber 21 of the downstream pressure regulating valve 2 to allow the valve chamber 41 and the pressure regulating chamber 21 to communicate with each other. Yes. The check valve outlet passage 51 is formed coaxially with the outlet passage 61. The valve body 43 is formed with an internal passage 431 that communicates the upstream side and the downstream side of the valve chamber 12.

(Introduction)
As shown in FIGS. 1 and 2, the introduction part 5 includes a block member 100 (body part), a plug 102, a filter 30, a holding spring 31 (biasing member), an O-ring 104 (seal member), and the like. It has. The introduction portion 5 corresponds to the “filter mounting structure” of the present invention.

  The block member 100 is fitted to the body member 7 so as to sandwich the valve seat 14 with the body member 7. The block member 100 includes an introduction chamber 106, an inlet passage 81, a valve chamber 12, and the like. The introduction chamber 106 is formed at a position upstream of the inlet passage 81, and the plug 102, the filter 30, the holding spring 31, and the O-ring 104 are provided therein. The inlet passage 81 communicates with the introduction chamber 106 and the valve chamber 12, and is provided with an introduction port 81a into which the fuel gas G is introduced at a portion connected to the introduction chamber 106 (see FIG. 2). The inlet passage 81 is a passage through which the fuel gas G introduced from the introduction chamber 106 through the introduction port 81 a flows to the valve chamber 12.

  The plug 102 is screwed in the introduction chamber 106 and is fixed to the block member 100. The plug 102 includes an inlet 8, an inlet passage 108, a filter housing portion 110, and the like. The inlet 8 is a portion that is formed at a position upstream of the inlet passage 108 and into which the fuel gas G is introduced. The inlet passage 108 communicates with the inlet 8 and the filter housing portion 110, and is a passage through which the fuel gas G introduced from the inlet 8 flows to the filter housing portion 110. In the filter housing part 110, the filter 30 and the holding spring 31 are housed.

  The filter 30 is made of metal and is provided so as to cover the inlet 81 a at a position upstream of the inlet passage 81. The filter 30 has a bottomed cylindrical shape, that is, a hollow cylindrical shape having a bottom surface portion 30 a on the upstream side and an open end 30 b on the downstream side (right end portion in FIG. 1). Also prevents foreign material from entering the downstream side. The end 30 b of the filter 30 is provided outside the filter housing 110 and in a space 112 (see FIG. 2) formed between the block member 100 and the plug 102. The filter 30 is not particularly limited to being formed in a bottomed cylindrical shape, and may be formed in a bottomed cylindrical shape other than the cylindrical shape (for example, an elliptical cylindrical shape).

  The O-ring 104 is provided between the end 30 b of the filter 30 and the surface 100 a around the introduction port 81 a in the block member 100. The filter 30 is biased by the holding spring 31 toward the introduction port 81a side (O-ring 104 side) of the filter 30 in the central axis direction. As a result, the O-ring 104 is sandwiched and supported between the end 30 b of the filter 30 and the surface 100 a of the block member 100.

  In the introduction portion 5 as described above, the fuel gas G flowing from the inlet 8 of the plug 102 flows through the inlet passage 108, passes through the filter 30, and then flows out to the valve chamber 12 through the inlet passage 81. It is like that.

<Operation of multistage pressure regulating valve>
Next, the operation (operation method) of the multistage pressure regulating valve 10 of the present embodiment will be described. As shown in FIG. 1, for example, when the supply of the fuel gas G to the vehicle fuel cell is started and the fuel gas G flows out from the outlet 6 in the direction of the arrow, the inside of the pressure regulating chamber 21 of the downstream pressure regulating valve 2. The pressure of the fuel gas G stored in the tank decreases. When the pressure of the fuel gas G in the pressure regulating chamber 21 decreases, the fuel gas G in the valve chamber 22 is supplied into the pressure regulating chamber 21 via the piston 24 and the through hole 2411 formed in the valve body 241. The pressure in the pressure regulating chamber 21 increases. When the pressure in the pressure regulating chamber 21 reaches a desired pressure, the piston 24 pushes down the coil spring 25, the lower end 2414 of the valve body 241 comes into contact with the valve seat 26, and the fuel gas G from the valve chamber 22 enters. Supply stops. Note that the pressure in the pressure regulating chamber 21 can be set to a desired value (final pressure) by adjusting the screwing amount of the adjusting screw 28 in advance.

  When the pressure of the fuel gas G in the valve chamber 22 decreases, the valve chamber 22 and the pressure regulating chamber 11 are communicated with each other by the middle passage 3, so that the fuel gas G stored in the pressure regulating chamber 11 is in the direction of the arrow. Along the middle passage 3.

  When the fuel gas G stored in the pressure regulating chamber 11 flows into the middle passage 3, the pressure in the valve chamber 22 increases. At this time, since the pressure in the pressure regulating chamber 11 decreases, the piston 15 slides toward the valve body 13 side of the upstream pressure regulating valve 1 by the biasing force of the coil spring 16 that biases the piston 15. That is, the piston 15 moves toward the valve body 13 while the annular seal member 151 is in contact with the inner peripheral surface of the pressure regulating chamber 11 and the sliding member 152 is in contact with the inner peripheral surface of the body member 7. Moving. Thereby, the valve body 13 which contacts the piston 15 moves upward.

  When the valve body 13 moves upward and is separated from the valve seat 14, the high-pressure fuel gas G supplied from the fuel tank to the inlet 8 is supplied to the inlet 8, the inlet passage 108, the filter 30, the inlet passage 81, and the internal passage. It is supplied into the pressure regulating chamber 11 via 136 and the valve chamber 12. By supplying the fuel gas G into the pressure regulating chamber 11 in this way, the pressure of the fuel gas G in the pressure regulating chamber 11 is maintained at a predetermined value. In addition, the pressure in the pressure regulation chamber 11 can be set to a predetermined value by adjusting the screwing amount of the stopper member 18 in advance.

  On the other hand, when the supply of the fuel gas G to the fuel cell is stopped, the pressure of the fuel gas G stored in the pressure regulating chamber 21 of the downstream pressure regulating valve 2 does not decrease. Therefore, since the pressure in the pressure regulating chamber 11 of the upstream pressure regulating valve 1 does not decrease, the piston 15 faces the side opposite to the valve body 13 against the biasing force of the coil spring 16 that biases the piston 15. Slide. Thereby, the valve body 13 which contacts the piston 15 moves downward. Then, the valve body 13 comes into contact with the valve seat 14.

  Thus, the valve body 13 is opened and closed by sliding the piston 15 in accordance with the difference between the pressure in the valve chamber 12 and the pressure in the pressure regulating chamber 11. That is, when the supply of the fuel gas G to the fuel cell is started, the valve body 13 is separated from the valve seat 14 by the piston 15 sliding toward the valve body 13 side. On the other hand, when the supply of the fuel gas G to the fuel cell is stopped, the piston 15 slides toward the opposite side of the valve body 13, so that the valve body 13 comes into contact with the valve seat 14.

  Further, when the supply of the fuel gas G to the fuel cell is stopped as described above, the pressure of the fuel gas G stored in the pressure regulating chamber 21 of the downstream pressure regulating valve 2 does not decrease. The escape location for the fuel gas G leaking into the middle passage 3 disappears, and the pressure in the middle passage 3 rises. When the pressure of the fuel gas G in the intermediate passage 3 becomes equal to or higher than a predetermined set pressure, the valve body 43 of the check valve 4 is separated from the inlet portion 42 and the check valve 4 operates. At this time, the fuel gas G is discharged from the middle passage 3 into the valve chamber 41 of the check valve 4 via the check valve inlet passage 52. Therefore, the fuel gas G is overloaded to the annular seal member 151 that seals the pressure regulating chamber 11 of the upstream pressure regulating valve 1 facing the middle passage 3 and the annular seal member 243 that seals the valve chamber 22 of the downstream pressure regulating valve 2. Can be avoided. The fuel gas G released into the valve chamber 41 of the check valve 4 is adjusted in the internal passage 431 of the valve body 43, the check valve outlet space 50, the check valve outlet passage 51, and the downstream pressure regulating valve 2. The pressure is supplied to the outlet 6 via the pressure chamber 21 and the outlet passage 61.

<Effect>
In this embodiment, an O-ring 104 is provided between the end 30 b of the filter 30 and the surface 100 a of the block member 100.

  Thereby, since the gap between the end 30b of the filter 30 and the surface 100a of the block member 100 is sealed by the O-ring 104, there is no gap between the end 30b of the filter 30 and the surface 100a of the block member 100. Is not formed. For this reason, when the foreign matter flows along the flow of the fuel gas G, it is difficult for the foreign matter to flow downstream from between the end 30b of the filter 30 and the surface 100a of the block member 100. It becomes easy to be done. That is, the foreign matter passes through the gap between the outer peripheral surface 30c of the filter 30 and the inner peripheral surface 110a of the filter housing portion 110 of the plug 102 (the surface forming the filter housing portion 110) from the inlet passage 108, thereby forming the space portion 112. Even if it flows in, it will become difficult to penetrate | invade further into the downstream from between the edge part 30b of the filter 30 and the surface 100a of the block member 100. FIG. Therefore, the foreign matter is prevented from flowing out downstream of the filter 30. Therefore, it is possible to prevent foreign matter from entering the upstream pressure regulating valve 1, the downstream pressure regulating valve 2, the middle passage 3 and the like provided after the inlet passage 81.

  Furthermore, even if the dimensional accuracy of the surface on the O-ring 104 side of the end 30b of the filter 30 is slightly low, the gap between the end 30b of the filter 30 and the surface 100a of the block member 100 is sealed by the O-ring 104. Therefore, the filter 30 can be easily manufactured, and the manufacturing cost of the filter 30 can be reduced.

  Note that another sealing member (for example, a liquid gasket) may be provided between the end 30 b of the filter 30 and the surface 100 a of the block member 100 instead of the O-ring 104.

  In addition, the introduction unit 5 includes a holding spring 31 that biases the filter 30 toward the introduction port 81a. Thereby, the sealing performance by the O-ring 104 is improved. Therefore, the gap between the end 30 b of the filter 30 and the surface 100 a of the block member 100 is more effectively sealed by the O-ring 104.

[Second Embodiment]
Next, the second embodiment will be described. Components that are the same as those of the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and different points will be mainly described.

  As shown in FIG. 3, in this embodiment, the block member 100 includes a groove portion 100 b for attaching the filter 30. The groove portion 100b is formed in a circular shape over the entire circumference of the introduction port 81a. The end 30b of the filter 30 is inserted into the groove 100b, and the filter 30 is thus attached to the block member 100. The O-ring 104 is provided in the groove portion 100b and is supported by being sandwiched between the end portion 30b of the filter 30 and the bottom surface 100c of the groove portion 100b.

  In the present embodiment, the block member 100 includes a groove portion 100 b for attaching the filter 30. The O-ring 104 is provided in the groove 100b.

  Thereby, the O-ring 104 is prevented from being displaced and positioning of the O-ring 104 is simplified. Further, the foreign matter cannot flow out to the downstream side unless it makes a U-turn flow in the groove portion 100b. However, since the foreign matter has a mass, the foreign matter collides with the bottom surface 100c of the groove portion 100b by the inertial force and enters the groove portion 100b. Stays on. Therefore, it is possible to more effectively suppress foreign matters from flowing out downstream of the filter 30.

[Third embodiment]
Next, the third embodiment will be described. The same components as those in the first embodiment and the second embodiment are denoted by the same reference numerals, description thereof will be omitted, and different points will be mainly described.

  As shown in FIG. 4, in this embodiment, the filter 30 includes a flange 30 d that extends from the outer peripheral surface 30 c of the filter 30 to the outside in the radial direction of the filter 30. The collar portion 30d is formed over the entire circumference in the circumferential direction of the filter 30.

  As a result, the foreign matter rides on the flow of the fuel gas G and flows into the space portion 112 from the inlet passage 108 through a gap between the outer peripheral surface 30c of the filter 30 and the inner peripheral surface 110a of the filter housing portion 110 of the plug 102. However, it collides with the collar 30d and stays there. As a result, the foreign matter is more effectively prevented from flowing out from between the end portion 30b of the filter 30 and the surface 100a of the block member 100 to the downstream side, and thus is easily captured and removed by the filter 30. Therefore, the foreign matter is more effectively prevented from flowing out downstream of the filter 30.

[Modification]
As a first modification, an example in which the introduction unit 5 does not include the O-ring 104 as illustrated in FIG. In this modification, the end portion 30 b of the filter 30 is inserted into the groove portion 100 b so as to contact the bottom surface 100 c of the groove portion 100 b of the block member 100. As a result, the foreign matter cannot flow out downstream unless the U-turn flows in the groove portion 100 b, so that the foreign matter is prevented from flowing downstream from the filter 30.

  Moreover, as a 2nd modification, as shown in FIG. 6, the example which the introduction part 5 does not have the O-ring 104 and the groove part 100b is also considered. In this modification, the filter 30 includes a flange 30d. The end 30 b of the filter 30 is in contact with the surface 100 a of the block member 100. Thus, even if foreign matter flows into the space portion 112 from the inlet passage 108 through the gap between the outer peripheral surface 30c of the filter 30 and the inner peripheral surface 110a of the filter housing portion 110 of the plug 102, it enters the flange portion 30d. Collide and stay on the spot. Thereby, it is suppressed that a foreign material flows out downstream from the filter 30.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, the filter mounting structure of the present invention can be applied to devices other than the pressure regulating valve.

1 upstream pressure regulating valve 2 downstream pressure regulating valve 3 middle passage 4 check valve 5 introduction part 7 body member 10 multistage pressure regulating valve 11 pressure regulating chamber 12 valve chamber 30 filter 30a bottom face part 30b end part 30c outer peripheral face 30d collar part 31 Retaining spring 81 Inlet passage 81a Inlet port 100 Block member 100a Surface 100b Groove portion 100c Bottom surface 102 Plug 104 O-ring 106 Inlet chamber 108 Inlet passage 110 Filter housing portion 110a Inner peripheral surface 112 Space portion 242 Annular seal member G Fuel gas

Claims (5)

A body part having a fluid inlet;
A bottomed cylindrical filter covering the inlet;
A seal member provided between the filter and the body part,
A filter mounting structure characterized by The filter mounting structure according to claim 1,
The body part includes a groove part for attaching the filter,
The seal member is provided in the groove,
A filter mounting structure characterized by The filter mounting structure according to claim 1 or 2,
The filter includes a flange extending outward from an outer peripheral surface of the filter;
A filter mounting structure characterized by The filter mounting structure according to any one of claims 1 to 3,
Having a biasing member that biases the filter toward the inlet;
A filter mounting structure characterized by A filter mounting structure comprising: a body portion including a fluid inlet; a bottomed cylindrical filter covering the inlet; and a seal member provided between the filter and the body;
A pressure adjusting unit that adjusts the pressure of the fluid introduced from the introduction port,
Pressure regulating valve characterized by

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