JP2007071351A - Remaining pressure display device for gas storage part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect the leak of gas with easy operation while maintaining good remaining pressure display operation by preventing the entry of detection liquid into a display device. <P>SOLUTION: A remaining pressure detection chamber 20 in which an see-through window hole 21 is opened is formed at the inner part of a mounting hole 19. A transparent cylinder member 23 and a holding member 24 are mounted in the mounting hole 19, in sequence. A space between the holding member 24 and the inner peripheral face of the mounting hole 19 is sealed by a first sealing member 25. An insertion hole 26 is provided in the holding member 24 in a viewable manner, and a pressure receiving operation rod 27 is inserted therein in a forward/backward movable manner. A leak port 32 is opened to the outer face of a housing 2 and communicated with the inner part of the remaining pressure detection chamber 20 via a leak gas delivery passage 33. The outer peripheral face of a cushion material 22a on the side of the holding member 24 tightly abuts on the inner peripheral face of the mounting hole 19 all over. In the holding member 24 between the holding member side cushion material 22a and the first seal member 25, a vent path 36 is formed for communicating the outer peripheral face of the holding member 24 with the insertion hole 26. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a residual pressure display device that displays a residual pressure of a gas stored in a gas storage section such as a gas container. More specifically, the operation of detecting a leak gas from the residual pressure display device is easy and can be detected. The present invention relates to a residual pressure display device for a gas storage unit that can prevent liquid and the like from entering the display device and can maintain a residual pressure display operation satisfactorily.

In general, a gas storage unit such as a gas container is provided with a residual pressure display device for displaying the gas pressure in the gas storage unit in order to display the remaining amount of the stored gas.
Conventionally, as the above-mentioned residual pressure display device, one end of a pressure receiving operation rod is inserted into a residual pressure detection chamber provided in a housing, and the pressure receiving operation rod is moved by the gas pressure in the gas storage portion to store the remaining stored gas. Some are configured to display pressure (see, for example, Patent Document 1).

  That is, in this prior art, a mounting hole is formed from the end surface of the housing toward the inside of the housing, a residual pressure detection chamber is formed at the back of the mounting hole, and a peripheral wall of the residual pressure detection chamber is formed from the outside of the housing. A visible window hole is opened. To this residual pressure detection chamber, a transparent cylindrical member having an annular cushion material disposed at both ends and a holding member are sequentially attached from the back side, and the above cylindrical member is attached to the back side of the mounting hole by attaching this holding member. It is pressed through the cushion material. In addition, between the holding member and the inner peripheral surface of the mounting hole, for example, a first seal member such as an O-ring is disposed and sealed.

The holding member is provided with an insertion hole that communicates the residual pressure detection chamber and the gas storage portion, and a pressure receiving operation rod is inserted into the insertion hole so as to be able to advance and retreat, and one end of the pressure receiving operation rod is inserted. A residual pressure detector is provided in the part. This residual pressure detection part is arrange | positioned in the cylindrical hole of said cylindrical member in said residual pressure detection chamber so that it can visually recognize from said fluoroscopic window hole. A second seal member is disposed and sealed between the bar intermediate portion of the pressure receiving operation bar and the insertion hole.
A cutout groove that communicates the outer surface of the holding member and the insertion hole is formed on the end surface of the holding member. In the unlikely event that a part of the contained gas leaks from the second seal member, the leaked gas does not accumulate inside the cylindrical member, and the inner peripheral surface of the mounting hole and the outer periphery of the cylindrical member are not accumulated in the notched groove. It is discharged to the outside through the transparent window hole through a gap with the surface.

  A balancing spring is supported between the pressure-receiving operation rod and the housing, and the pressure-receiving operation rod is attached from the residual pressure detection chamber side to the gas storage portion side by the elastic pressure of the balance spring. It is energized. The pressure receiving bar moves forward and backward due to the balance between the elastic pressure of the balance spring and the gas pressure applied to the pressure receiving bar, and the remaining pressure detection unit displays the remaining amount of stored gas.

  The first sealing member and the second sealing member seal the gas storage part from the residual pressure detection chamber and the outer space. If the sealing by both the sealing members is insufficient, A part leaks to the outside through the transparent window hole through a gap between the inner peripheral surface of the mounting hole and the outer peripheral surface of the cylindrical member. Therefore, in order to confirm whether or not these sealing members securely seal the gas storage portion, the presence or absence of leak gas from the residual pressure display device is inspected.

  Specifically, the presence or absence of the above-mentioned leak gas is determined by applying a leak gas detection liquid such as soap solution from the above-mentioned transparent window hole between the outer peripheral surface of the cylindrical member and the inner peripheral surface of the mounting hole. Inspected by checking if bubbles are generated. That is, when no bubbles are generated in the detection liquid, it is determined that the above-described both sealing members reliably seal the gas storage portion. On the other hand, when bubbles are generated in the detection liquid, it is determined that the sealing of either the first seal member or the second seal member is insufficient, and after the residual pressure display device is removed, Parts are replaced as needed and reassembled correctly.

JP-A 63-96399

The above leakage gas detection liquid must be applied evenly over the entire annular gap between the inner peripheral surface of the mounting hole formed around the cylindrical member, and the leak gas detection operation is troublesome and is performed on the back side of the cylindrical member. Bubbles may be generated, and it is not easy to check for the presence of leak gas.
In addition, since the annular gap communicates with the insertion hole through the notch groove, the leak gas detection liquid applied to the annular gap passes through the notch groove and enters the insertion hole. Easy to flow into. Furthermore, rainwater containing dust or the like may enter the insertion hole through the notch groove from the above-described see-through window hole. Since the detection liquid or the like that has entered the insertion hole adheres to the surface of the pressure receiving operation rod, there is a risk that the sliding resistance with the second seal member will increase, resulting in malfunction.

  The technical problem of the present invention is to solve these problems, to easily detect leak gas from the residual pressure display device, and to prevent the detection liquid and the like from entering the display device. An object of the present invention is to provide a residual pressure display device for a gas storage unit that can maintain the operation well.

In order to solve the above problems, the present invention is configured as follows, for example, based on FIGS. 1 to 4 showing an embodiment of the present invention.
That is, the present invention relates to a residual pressure display device for a gas storage portion, wherein a mounting hole (19) is formed from the end face of the housing (2) into the housing (2), and the remaining portion is left behind the mounting hole (19). A pressure detection chamber (20) is formed, and a transparent window hole (21) that is visible from the outside of the housing (2) is opened on the peripheral wall of the residual pressure detection chamber (20), and the above-described mounting hole (19) is opened. A transparent cylindrical member (23) in which annular cushion materials (22) are arranged at both ends, and a holding member (24) are mounted in order from the back side, and the cylindrical member (23 ) To the back side of the mounting hole (19) via the cushion material (22), and the first member for sealing between the holding member (24) and the inner peripheral surface of the mounting hole (19). A sealing member (25) is provided, and an insertion hole (26) is provided through the holding member (24) to communicate the residual pressure detection chamber (20) and the gas storage part (4a). Insert the pressure receiving actuating rod (27) into (26) so that it can move forward and backward. A second seal member (28) is provided for sealing between the intermediate portion of the pressure receiving operation rod (27) and the insertion hole (26), and the cylindrical member in the residual pressure detection chamber (20) is provided. (23), a residual pressure detector (29) is provided on the pressure receiving actuating rod (27), and a balance spring (31) is provided between the pressure receiving actuating rod (27) and the housing (2). The residual pressure of the gas storage part is urged from the residual pressure detection chamber (20) side to the gas storage part (4a) side by the elastic pressure of the balance spring (31). In the display device, a leak port (32) is opened on the outer surface of the housing (2), and the leak port (32) is connected to a leak gas outlet path (33 ), The outer peripheral surface of the cushion member (22a) on the holding member (24) side is in close contact with the inner peripheral surface of the mounting hole (19) over the entire periphery. Between the holding member side cushion material (22a) and the first seal member (25). A member of the holding (24), characterized in that the formation of the holding member air passage for communicating the outer peripheral surface and the insertion hole (26) (24) (36).

  Here, the formation position of the leak port may be any position as long as it is the outer surface of the housing, and is usually formed at a position where the detection liquid can be easily applied or visually observed from the outside.

In the unlikely event that the sealing of the first seal member is insufficient, the leaked gas leaked from the sealing portion between the outer peripheral surface of the holding member and the inner peripheral surface of the mounting hole is the holding member side. Since the outer peripheral surface of the cushion material is in close contact with the inner peripheral surface of the mounting hole over the entire periphery, it does not flow out between the outer peripheral surface of the cylindrical member and the inner peripheral surface of the mounting hole. Instead, the air flows into the insertion hole through the air passage. The leak gas then flows out from the leak port to the external space through the cylinder hole of the cylinder member and the leak gas lead-out path in order.
On the other hand, if the sealing of the second seal member is insufficient, the leak gas leaked from the seal portion flows into the cylindrical hole of the cylindrical member through the insertion hole, and the leak gas outlet path It flows out from leak port to outside space.

  The presence or absence of the leak gas is inspected by applying a leak gas detection liquid such as soap liquid to the leak port and confirming whether bubbles are generated in the detection liquid. That is, when no bubbles are generated in the detection liquid, it is determined that both the sealing members securely seal the gas storage portion. When bubbles are generated in the detection liquid, the first sealing member or It is determined that the sealing of at least one of the second seal members is insufficient. If the sealing is insufficient, after the residual pressure display device is removed, the parts are replaced as necessary and assembled again.

  Unlike the prior art, the detection liquid is not applied between the outer peripheral surface of the cylindrical member and the inner peripheral surface of the mounting hole, and therefore does not enter the insertion hole from this gap. Even if rainwater or the like enters the fluoroscopic window hole, the outer peripheral surface of the holding member side cushion material is in close contact with the inner peripheral surface of the mounting hole over the entire periphery. These rainwater and the like are blocked by the holding member side cushion material and do not enter the insertion hole.

  Said holding member side cushion material can be equipped with the latching | locking part which can be latched to the edge part of said cylinder member, or the edge part of a holding member. In this case, the outer peripheral surface of the holding member-side cushion material is positioned with respect to the cylindrical member and the holding member by the locking portions being locked to these end portions. Thereby, when pressing a cylinder member with said holding member, it can prevent that this holding member side cushion material moves and decenters with the pressing force, and the outer peripheral surface of this holding member side cushion material is made into the perimeter. As a result, it can be brought into better contact with the inner peripheral surface of the mounting hole, which is preferable.

  Moreover, said holding member can form the end surface contact | abutted with said holding member side cushion material in the inclined surface which recedes, so that it goes to an outer peripheral side. In this case, when the holding member presses the cylindrical member to the back side of the mounting hole via the cushion material, the holding member side cushion material is pressed to the outer peripheral side by the inclined surface. Therefore, it is preferable that the outer peripheral surface of the holding member side cushion material can be brought into better contact with the inner peripheral surface of the mounting hole over the entire periphery.

  Since the present invention is configured and operates as described above, the following effects can be obtained.

(1) To detect the presence or absence of leak gas from the residual pressure display device, it is only necessary to apply a leak gas detection liquid to the leak port formed on the outer surface of the housing and confirm the generation of bubbles. The formation position may be on the outer surface of the housing, and since it can be formed from the outside at any position where visual inspection or coating processing is easy, the application operation of the above detection liquid is easy, and the presence or absence of leak gas can be confirmed easily and reliably. can do.

(2) The leak gas detection liquid is only applied to the leak port, and does not enter the insertion hole from the gap between the outer peripheral surface of the cylindrical member and the inner peripheral surface of the mounting hole. Even if it enters the fluoroscopy window hole, it is blocked by the holding member side cushion material and does not enter the insertion hole, so that these detection liquids can be prevented from entering the display device, and these liquids receive pressure. The residual pressure display operation can be satisfactorily maintained without fear of hindering the forward / backward movement of the rod.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of the present invention, FIG. 1 is a longitudinal sectional view of a valve device provided with a residual pressure display device, FIG. 2 is an enlarged sectional view of the residual pressure display device, and FIG. 3 is a holding member side cushion. It is an expanded sectional view near a material.

  As shown in FIG. 1, the housing (2) of the valve device (1) is provided with a leg screw part (3) at the lower part, and the leg screw part (3) is a container neck part (4) of the gas container (4). 5) It is screwed and fixed in a tight manner. A gas inlet (6) is opened on the lower surface of the leg screw portion (3) so as to face the gas storage portion (4a) in the gas container (4), and the gas opened on the side surface of the housing (2). Between the outlet (7), an inlet passage (8), a closing valve chamber (10) of a closing valve (9), and an outlet passage (11) are formed in this order. A gas escape passage (12) branches off from the inlet passage (8), and a safety valve (13) is attached to the gas escape passage (12).

  The housing (2) is provided with an operation handle (14) on the upper surface, and is linked to a closing member (15) inserted in the closing valve chamber (10) so as to be able to advance and retract in the vertical direction. It is. A positioning hole (16) is provided on the side surface of the housing (2) opposite to the gas outlet (7), and a pin engagement is provided below the gas outlet (7). A hole (17) is provided. Further, a residual pressure display device (18) for displaying the residual pressure in the gas storage part (4a) is attached to the lower half of the housing (2).

  When the stored gas is taken out from the gas container (4) or when the gas container (4) is filled with fresh gas, the valve device (1) is not equipped with a gas using device or gas filling device (not shown). Connected via a connecting tool, the closing valve (9) is opened by the operation handle (14). At this time, the yoke-type connector is attached to the valve device (1) at a predetermined position and posture with the tip of the tightening screw attached thereto locked in the positioning hole (16). Further, the yoke type connector is provided with an engagement pin at a predetermined position corresponding to the type of gas to be handled, and the engagement pin engages with the pin engagement hole (17). (4) A yoke-type fitting suitable for the gas type in FIG.

Next, the residual pressure display device (18) will be described mainly based on FIG. 2 and FIG.
As shown in FIG. 2, the housing (2) has a mounting hole (19) formed from the lower end surface of the leg screw portion (3) into the housing (2). The residual pressure detection chamber (20) is formed at the back of the). A transparent window hole (21) is opened in the peripheral wall of the residual pressure detection chamber (20), and the inside of the residual pressure detection chamber (20) is visually observed from the outside of the housing (2) through the transparent window hole (21). Is done.

  In the mounting hole (19), a transparent cylindrical member (23) in which an annular cushion material (22) is arranged at each end, and this cylindrical member (23) is pressed to the back side of the mounting hole (19). A holding member (24) that is fixedly held in this order is attached in order from the back side. That is, the cylindrical member (23) is pressed to the back side of the mounting hole (19) by the holding member (24) via the cushion material (22), and most of the cylindrical member (23) is the transparent window hole. Arranged in the residual pressure detection chamber (20) as seen from (21). Further, a first seal member (25) made of an O-ring is disposed between the holding member (24) and the inner peripheral surface of the mounting hole (19) to seal the gap between them. .

  The holding member (24) has an insertion hole (26) that communicates the inside of the residual pressure detection chamber (20) and the gas container (4a) in the gas container (4) in the vertical direction. It is set up. A pressure receiving operation rod (27) is inserted in the insertion hole (26) so as to be able to advance and retreat, and a second seal member (28) made of an O-ring is provided at a lower portion of the inner surface of the insertion hole (26). The space between the inner surface of the insertion hole (26) and the intermediate portion of the pressure receiving operation rod (27) is sealed.

  A residual pressure detector (29) is provided at the upper end of the pressure receiving operation rod (27). The residual pressure detector (29) is movable up and down in the cylindrical hole of the cylindrical member (23) in response to the advance / retreat movement of the pressure-receiving operation rod (27), and the height position thereof is the above-described see-through window. It is set in a visible range from the hole (21).

A spring support cylinder (30) is screwed to the lower part of the holding member (24), and a tension coil spring is provided between the spring support cylinder (30) and the pressure receiving operation rod (27). The balance spring (31) is stretched. The pressure receiving operating rod (27) is biased downward by the elastic pressure of the balance spring (31). Therefore, a downward elastic pressure by the balance spring (31) and an upward pressing force by the gas pressure in the gas accommodating part (4a) are applied to the pressure receiving operation rod (27). Then, the vertical movement of the pressure receiving operation rod (27) stops at a position where the two are balanced, whereby the residual pressure of the gas storage section (4a) is detected by the residual pressure detection section (29) in the cylindrical member (23). Is displayed.
In this embodiment, the balance spring (31) is constituted by a tension coil spring, but the balance spring (31) used in the present invention is configured so that the pressure receiving operation rod (27) is connected to the residual pressure detection chamber (20) side. What is necessary is just to be urged | biased to the gas accommodating part (4a) side, and it may be comprised with a compression coil spring, or may be attached between the other site | parts of a housing, and a receiving pressure actuating rod.

  The upper end of the cylindrical member (23) is opened facing the back of the residual pressure detection chamber (20), and the back of the residual pressure detection chamber (20) is opened on the outer surface of the housing (2). The leak port (32) communicates with the leak port (33) through the leak gas outlet path (33). Therefore, if the sealing by the second seal member (28) is insufficient, the leaked gas leaked from the sealing portion passes through the insertion hole (26) and flows into the cylindrical member (23). It flows into the cylindrical hole and flows out from the leak port (32) to the external space through the leak gas lead-out path (33).

  Of the cushioning material (22) provided at both ends of the cylindrical member (23), at least the cushioning material (22a) on the holding member (24) side is mounted as described above over the entire circumference. The hole (19) is in close contact with the inner peripheral surface. As shown in FIG. 3, the holding member side cushion material (22a) includes a locking portion (34) made of an annular ridge protruding upward along the inner peripheral edge. 34) is locked to the inner peripheral surface of the lower end of the cylindrical member (23). As a result, when the holding member (24) presses the cylindrical member (23) during assembly, the cushion member (22a) moves with respect to the cylindrical member (23) and is eccentric so that a so-called misalignment occurs. This prevents the outer peripheral surface of the cushion material (22a) from coming into good contact with the inner peripheral surface of the mounting hole (19) over the entire periphery.

In this embodiment, the above-described locking portion (34) is configured by an annular ridge, but in the present invention, the locking portion only needs to be locked to the end portion of the cylindrical member, and the concave groove Or protrusions formed at predetermined intervals along the inner peripheral edge of the cushion material (22a), or may be one that engages with the outer peripheral surface of the cylindrical member.
Further, the locking portion (34) projects from the lower surface of the holding member side cushion member (22a) and locks to the upper end portion of the holding member (24) as in the modification shown in FIG. 4, for example. It is also possible.

  The holding member (24) is formed on an inclined surface that recedes downward as the upper end surface (35) in contact with the holding member side cushion member (22a) moves toward the outer peripheral side. For this reason, when the holding member (24) presses the cylindrical member (23) during assembly, the holding member side cushion material (22a) is pressed to the outer peripheral side by the upper end surface (35), As a result, the outer peripheral surface of the cushion material (22a) is in good contact with the inner peripheral surface of the mounting hole (19) over the entire periphery.

  The holding member (24) includes the insertion hole (26) and the holding member (24) between the holding member side cushion material (22a) and the first seal member (25). An air passage (36) communicating with the outer peripheral surface is formed. As described above, since the outer peripheral surface of the holding member side cushion material (22a) is in close contact with the inner peripheral surface of the mounting hole (19) over the entire circumference, rainwater and the like are externally applied. Even if it enters the fluoroscopic window hole (21), it is prevented from entering the insertion hole (26) from the ventilation path (36). In addition, if the sealing by the first seal member (25) is insufficient, the leak gas leaked from the sealing portion is caused by the outer peripheral surface of the cylindrical member (23) and the inner periphery of the mounting hole (19). Instead of flowing into the transparent window hole (21) from between the surface, the air flows into the insertion hole (26) through the air passage (36), and the leakage gas in the cylindrical hole of the cylindrical member (23). It flows through the lead-out path (33) in order and flows out from the leak port (32) to the external space.

  When inspecting the sealing performance by both seal members (25, 28) of the residual pressure display device (18), a leak gas detection liquid is applied to the leak port (32), and bubbles are generated in the detection liquid. It is confirmed whether or not. When bubbles do not occur in the detection liquid, it is determined that both the sealing members (25, 28) securely seal the gas storage part (4a). It is determined that at least one of the first seal member (25) and the second seal member (28) is not sufficiently sealed. If the sealing is insufficient, after the residual pressure display device (18) is removed, the parts are replaced as necessary and correctly assembled into the housing (2) of the valve device (1). The

  Note that the residual pressure display device described in the above embodiment is illustrated to embody the technical idea of the present invention, and the shape and structure of the residual pressure display device and the valve device are the same as those of this embodiment. The present invention is not limited to this, and various modifications can be made within the scope of the claims of the present invention. For example, in the above embodiment, the case where the residual pressure display device is assembled to the gas container valve device has been described. However, the residual pressure display device of the present invention may be attached to, for example, a pipe, or may be assembled as a single unit in a housing that does not include a stop valve or the like. Furthermore, it goes without saying that the gas stored in the gas storage unit is not limited to a specific gas type.

  The residual pressure display device according to the present invention is easy to detect leak gas, and further prevents the detection liquid from entering the display device and can maintain the residual pressure display operation well. Although it is particularly preferably used for a pressure display device, it is also preferably used for a residual pressure display device attached to piping or the like.

It is a longitudinal cross-sectional view of the valve apparatus provided with the residual pressure display apparatus which shows embodiment of this invention. It is an expanded sectional view of a residual pressure display device of an embodiment of the present invention. It is an expanded sectional view near the holding member side cushion material of the embodiment of the present invention. It is an expanded sectional view of the holding member side cushion material vicinity which shows the modification of this invention.

Explanation of symbols

2 ... Housing
4a… Gas storage
18… Residual pressure display device
19… Mounting hole
20… Residual pressure detection chamber
21 ... Transparent window hole
22… Cushion material
22a ... Holding member side cushion material
23 ... Cylinder member
24 ... Holding member
25 ... 1st seal member
26 ... insertion hole
27 ... Pressure actuating rod
28 ... Second seal member
29… Residual pressure detector
31 ... Balance spring
32 ... Leak port
33 ... Leak gas outlet
34 ... Locking part
35 ... End surface (upper end surface) of holding member (24)
36 ... Ventilation channel

Claims (3)

A mounting hole (19) is formed from the end face of the housing (2) into the housing (2), and a residual pressure detection chamber (20) is formed at the back of the mounting hole (19) to detect this residual pressure. A transparent window hole (21) that is visible from the outside of the housing (2) is opened in the peripheral wall of the chamber (20),
A transparent cylindrical member (23) in which annular cushion materials (22) are arranged at both ends and a holding member (24) are sequentially attached to the mounting hole (19) from the back side, and the holding member (24 ) To push the cylindrical member (23) to the back side of the mounting hole (19) via the cushion material (22), and the holding member (24) and the inner peripheral surface of the mounting hole (19). Providing a first seal member (25) for sealing between
The holding member (24) is provided with an insertion hole (26) that allows the residual pressure detection chamber (20) and the gas storage portion (4a) to communicate with each other, and a pressure receiving operation rod (26) is inserted into the insertion hole (26). 27) is inserted so as to be able to advance and retract, and a second seal member (28) is provided for sealing between the intermediate portion of the pressure-receiving operation rod (27) and the insertion hole (26),
In the cylindrical member (23) in the residual pressure detection chamber (20), a residual pressure detector (29) is provided on the pressure receiving operation rod (27),
A balancing spring (31) is supported between the pressure receiving actuating rod (27) and the housing (2), and the pressure receiving actuating rod (27) remains with the elastic force of the balancing spring (31). Residual pressure display device of the gas storage unit urged from the pressure detection chamber (20) side to the gas storage unit (4a) side,
A leak port (32) is opened on the outer surface of the housing (2), and the leak port (32) communicates with the inner part of the residual pressure detection chamber (20) via a leak gas lead-out path (33). ,
The outer peripheral surface of the cushion member (22a) on the holding member (24) side is in close contact with the inner peripheral surface of the mounting hole (19) over the entire circumference,
Between the holding member side cushion material (22a) and the first seal member (25), the holding member (24) has an outer peripheral surface of the holding member (24) and the insertion hole (26). A residual pressure display device for a gas storage section, characterized in that an air passage (36) communicating with each other is formed.   The holding member side cushion material (22a) includes a locking portion (34) that can be locked to at least one of the end portion of the cylindrical member (23) and the end portion of the holding member (24). The residual pressure display apparatus of the gas accommodating part of Claim 1.   The said holding member (24) is formed in the inclined surface which recedes, so that the end surface (35) contact | abutted to said holding member side cushion material (22a) goes to an outer peripheral side. The residual pressure display apparatus of the gas accommodating part of description.

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