CN214093144U - Recharge-raise change-over valve - Google Patents

Recharge-raise change-over valve Download PDF

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Publication number
CN214093144U
CN214093144U CN202022555492.4U CN202022555492U CN214093144U CN 214093144 U CN214093144 U CN 214093144U CN 202022555492 U CN202022555492 U CN 202022555492U CN 214093144 U CN214093144 U CN 214093144U
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China
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recharge
ball seat
channel
water
valve body
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CN202022555492.4U
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Chinese (zh)
Inventor
胡石锋
杨海超
王建伟
赖学明
盖旭波
宋祖厂
王旭东
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Petrochina Co Ltd
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Petrochina Co Ltd
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Abstract

The utility model discloses a recharge-raise change-over valve belongs to water conservancy development field. The recharge-recharge switching valve comprises: the water-retaining valve comprises a valve body, an upper ball seat, a lower ball seat, an upper joint, a lower joint and a water retaining piece; the upper joint, the valve body, the lower ball seat and the lower joint are connected in sequence; the upper ball seat is positioned on the inner side wall of the valve body, the side wall of the valve body and the upper ball seat are provided with a recharge channel communicated along the radial direction, and the recharge channel is communicated with the inner cavity of the valve body; the bottom of the lower ball seat is provided with a lifting channel communicated along the axial direction, and the lifting channel is communicated with the inner cavity of the valve body; the water blocking piece includes: the water retaining device comprises a water retaining body, an upper water retaining block and a lower water retaining block, wherein the side part of the water retaining body is rotatably connected with the inner wall of the lower ball seat; the upper water blocking block is connected with the upper end of the water blocking body and used for blocking the recharge channel; the lower water blocking block is connected with the lower end of the water blocking body and used for blocking the lifting channel. The recharge-raise switching valve can automatically switch the flow direction of the channel according to recharge and raise operation, so that the recharge raise operation is time-saving and labor-saving.

Description

Recharge-raise change-over valve
Technical Field
The utility model relates to a water conservancy development field, in particular to recharge-rising change-over valve.
Background
Because the water level is reduced, the ground is settled, the water yield of the geothermal well is reduced and even the abandonment problem is increasingly serious due to the long-term depletion type exploitation of the underground water, the underground water is required to be recharged at present, and the cyclic utilization of the underground water and heat resources is realized. However, the pore stratum is easy to cause the plugging problems such as stratum pore blockage, permeability reduction, recharge quantity reduction and the like due to the problems of poor reservoir cementation degree, substandard recharge water treatment and the like, and at the moment, the recharge well with the plugging problems needs to be pumped and washed, namely, the recharge well is pumped and pumped to the ground surface by a pumping pump downwards until the water quality is clear and free of impurities.
The prior art adopts the following mode when raising the recharge well: firstly, a recharge pipe is lifted out, and then a submersible pump is put in for raising; secondly, the annular space of the pumping pipe and the well pipe is utilized for recharging; and thirdly, simultaneously lowering the pump pipe and the return pipe into the well.
In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art:
in the above mode, for frequent lifting operation, the difficulty is high, and time and labor are consumed; the two modes can cause gas to enter the stratum along with the recharge water, so as to cause blockage or accelerate the corrosion of metal pipe fittings in the well; the three methods require the wellbore to have a large diameter, and most recharge wells cannot meet this requirement.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a recharge-raise change-over valve can solve above-mentioned technical problem.
Specifically, the method comprises the following technical scheme:
a recharge-recharge switching valve, the recharge-recharge switching valve comprising: the water-retaining valve comprises a valve body, an upper ball seat, a lower ball seat, an upper joint, a lower joint and a water retaining piece;
the upper end of the valve body is connected with the lower end of the upper joint, and the upper end of the upper joint is configured to be connected with a recharging pipe;
the lower end of the valve body is connected with the upper end of the lower ball seat, the lower end of the lower ball seat is connected with the upper end of the lower joint, and the lower end of the lower joint is configured to be connected with a lifting pump;
the upper ball seat is positioned on the inner side wall of the valve body, the side wall of the valve body and the upper ball seat are provided with a recharging channel communicated along the radial direction, and the recharging channel is communicated with the inner cavity of the valve body;
the bottom of the lower ball seat is provided with a lifting channel communicated along the axial direction, and the lifting channel is communicated with the inner cavity of the valve body;
the water blocking member includes: the water retaining device comprises a water retaining body, an upper water retaining block and a lower water retaining block, wherein the side part of the water retaining body is rotatably connected with the inner wall of the lower ball seat;
the upper water blocking block is connected with the upper end of the water blocking body and is configured to be used for blocking the recharge channel;
the lower water blocking block is connected with the lower end of the water blocking body and is configured to be used for blocking the pumping-back channel.
In some possible implementations, a cross-sectional area of a first end of the upper ball seat is greater than a cross-sectional area of a second end of the upper ball seat;
the first end of the upper ball seat is the end of the upper ball seat connected with the inner side wall of the valve body;
the second end of the upper ball seat is the other end of the upper ball seat, which is far away from the inner side wall of the valve body.
In some possible implementations, the inlet end of the recharge channel is arranged obliquely.
In some possible implementations, the port of the inlet end of the recharge channel is provided with a chamfer.
In some possible implementations, the recharging channel is a cylindrical channel, and the upper water blocking block is a hemispherical block body matched with the recharging channel in structure.
In some possible implementations, the pumping channel is a cylindrical channel, and the lower water blocking block is a hemispherical block body matched with the structure of the recharging channel.
In some possible implementations, the outlet end of the pumping channel is provided with a chamfer at a port thereof.
In some possible implementations, the side portion of the water blocking body has a first connecting platform, and the first connecting platform has a first shaft hole;
the inner side of the lower ball seat is provided with a second connecting platform, and a second shaft hole is formed in the second connecting platform;
one of the first connecting table and the second connecting table is provided with an embedding groove, and the other one of the first connecting table and the second connecting table is embedded into the embedding groove so that the first shaft hole is communicated with the second shaft hole;
the recharge-raise conversion valve also comprises a rotating shaft, and the rotating shaft is positioned in the first shaft hole and the second shaft hole which are communicated.
In some possible implementations, the upper end of the valve body is threadedly connected with the lower end of the upper joint;
the lower end of the valve body is in threaded connection with the upper end of the lower ball seat;
the lower end of the lower ball seat is in threaded connection with the upper end of the lower joint.
In some possible implementations, the upper water deflector block and the lower water deflector block are staggered from each other.
The embodiment of the utility model provides a technical scheme's beneficial effect includes at least:
the embodiment of the utility model provides a recharge-back up change-over valve can be arranged in the recharging well, carries out the conversion of recharging operation and back up operation in the recharging well. When the device is used, the upper end of the upper joint is connected with a recharge pipe, and the lower end of the lower joint is connected with a return pump, so that the installation of the recharge-return conversion valve in a recharge well is completed. When the recharging operation is carried out in the recharging well, the recharging water enters the valve body through the recharging pipe and is discharged out of the valve body along the recharging channel to enter the stratum, and recharging is finished. In the process, under the action of water pressure, the lower water blocking block of the water blocking piece blocks the return channel to prevent the return channel from entering water. When the pumping operation is carried out in the recharging well, liquid enters the lower joint through the pumping pump and then upwards jacks the water retaining piece, the water retaining piece upwards rotates to enable the lower water retaining piece to leave the pumping channel, the upper water retaining piece blocks the recharging channel, and the liquid finally flows to the recharging pipe through the valve body and then flows out of the well mouth to complete the pumping operation. It is thus clear that utilize the utility model discloses recharge-raise change-over valve that the embodiment provided can make recharge operation and raise operation go on smoothly according to recharge and the automatic switching channel flow direction of raise operation, has avoided raising back the time and has played the recharge tubular column, makes recharge-raise operation easier, labour saving and time saving more.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of a recharge-raise changeover valve provided in an embodiment of the present invention in a recharge state;
fig. 2 is a schematic structural diagram of a recharge-recharge changeover valve provided in an embodiment of the present invention in a recharge state;
fig. 3 is a schematic view of a connection relationship between the water blocking member and the lower ball seat according to an embodiment of the present invention.
The reference numerals denote:
1-a valve body, wherein the valve body is provided with a valve body,
2-a ball seat is arranged on the upper portion of the ball seat,
3-a ball seat is arranged at the lower part of the ball seat,
301-a second connecting station, which is,
4-an upper joint, wherein the joint is a hollow joint,
5-the lower end of the joint is connected,
6-a water-retaining member, which is provided with a water-retaining ring,
601-the water retaining body, wherein the water retaining body,
602-the upper water-retaining block is arranged,
603-a lower water-retaining block, wherein,
604-the first connection station,
7-a recharging channel is arranged on the upper portion of the container,
8-a lifting channel is arranged on the lower portion of the shell,
9-rotating shaft.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe the embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment of the utility model provides an all have the return pump in the well of "recharge well" that relates to.
The embodiment of the utility model provides a recharge-raise change-over valve, as shown in figure 1 and figure 2, this recharge-raise change-over valve includes: the ball valve comprises a valve body 1, an upper ball seat 2, a lower ball seat 3, an upper joint 4, a lower joint 5 and a water retaining piece 6.
Wherein, the upper end of the valve body 1 is connected with the lower end of the upper joint 4, and the upper end of the upper joint 4 is configured to be connected with a recharging pipe;
the lower end of the valve body 1 is connected with the upper end of the lower ball seat 3, the lower end of the lower ball seat 3 is connected with the upper end of the lower joint 5, and the lower end of the lower joint 5 is configured to be connected with a lifting pump;
the upper ball seat 2 is positioned on the inner side wall of the valve body 1, the side wall of the valve body 1 and the upper ball seat 2 are provided with a recharging channel 7 communicated along the radial direction, and the recharging channel 7 is communicated with the inner cavity of the valve body 1;
the bottom of the lower ball seat 3 is provided with a lifting channel 8 communicated along the axial direction, and the lifting channel 8 is communicated with the inner cavity of the valve body 1;
the water deflector 6 includes: the water retaining device comprises a water retaining body 601, an upper water retaining block 602 and a lower water retaining block 603, wherein the side part of the water retaining body 601 is rotatably connected with the inner wall of the lower ball seat 3;
the upper water blocking block 602 is connected with the upper end of the water blocking body 601, and the upper water blocking block 602 is configured to block the recharge channel 7;
the lower water blocking block 603 is connected with the lower end of the water blocking body 601, and the lower water blocking block 603 is configured to block the pumping-up channel 8.
The embodiment of the utility model provides a recharge-back up change-over valve can be arranged in the recharging well, carries out the conversion of recharging operation and back up operation in the recharging well. When the device is used, the upper end of the upper joint 4 is connected with a recharge pipe, and the lower end of the lower joint 5 is connected with a return pump, so that the installation of the recharge-return conversion valve in a recharge well is completed. As shown in the attached figure 1, when recharging operation is carried out in the recharging well, recharging water enters the valve body 1 through the recharging pipe and is discharged out of the valve body 1 along the recharging channel 7 to enter the stratum, and recharging is finished. In the process, under the action of water pressure, the lower water blocking block 603 of the water blocking piece 6 blocks the return channel 8 to prevent the return channel 8 from entering water. As shown in fig. 2, when the pumping operation is performed in the recharging well, the liquid enters the lower joint 5 by the pumping pump, and then pushes up the water blocking piece 6, the water blocking piece 6 rotates upwards, so that the lower water blocking piece 603 leaves the pumping channel 8, the upper water blocking piece 602 blocks the recharging channel 7, and the liquid finally flows to the recharging pipe through the valve body 1, and then flows out of the well mouth, thereby completing the pumping operation. It is thus clear that utilize the utility model discloses recharge-raise change-over valve that the embodiment provided can make recharge operation and raise operation go on smoothly according to recharge and the automatic switching channel flow direction of raise operation, has avoided raising back the time and has played the recharge tubular column, makes recharge-raise operation easier, labour saving and time saving more.
In some possible implementations, as shown in fig. 1, a cross-sectional area of a first end of the upper ball seat 2 is larger than a cross-sectional area of a second end of the upper ball seat 2; wherein, the first end of the upper ball seat 2 is the end of the upper ball seat 2 connected with the inner side wall of the valve body 1; the second end of the upper ball seat 2 is the other end of the upper ball seat 2 far away from the inner side wall of the valve body 1.
The cross-sectional area of the first end of the upper ball seat 2 is larger than the cross-sectional area of the second end of the upper ball seat 2, so that the connection tightness of the upper ball seat 2 and the inner wall of the valve body 1 can be improved, and the upper water blocking block 602 and the recharging channel 7 are matched and blocked to avoid interference. For example, the upper ball seat 2 is a truncated cone structure.
Further, as shown in fig. 1, the inlet end of the recharge channel 7 is obliquely arranged, wherein the inlet end of the recharge channel 7 refers to the end far away from the inner side wall of the valve body 1, i.e. the end which is blocked by the upper water stop 602 in a matching way, and the lower end of the inlet end of the recharge channel 7 has an included angle with the horizontal plane, for example, the included angle is 30-45 °.
The structural design is favorable for completely sealing the upper water retaining block 602 and the recharge channel 7, and when the water retaining piece 6 rotates upwards, the water retaining piece can be blocked with the recharge channel 7 when the rotating angle is lower than 90 degrees.
In some possible implementations, the end of the inlet end of the recharge channel 7 is chamfered, which facilitates easier access to the inlet end of the recharge channel 7 when the upper water stop 602 is rotated upwards with the water stop 6.
The recharging channel 7 is adapted to the structure of the upper water stop 602, for example, the recharging channel 7 is cylindrical, prismatic, elliptical, etc. In some possible implementations, the recharge channel 7 is a cylindrical channel, and the upper water stop 602 is a hemispherical block that is structurally matched to the recharge channel 7.
The recharging channel 7 and the upper water retaining block 602 with the structure have the advantages of simple structure and convenience in molding and preparation.
The pumping-up channel 8 is adapted to the structure of the lower water stop 603, for example, the pumping-up channel 8 is cylindrical, prismatic, elliptical, etc. In some possible implementations, the pumping channel 8 is a cylindrical channel, and the lower water stop 603 is a hemispherical block that is structurally matched with the recharging channel 7.
The lifting channel 8 and the lower water retaining block 603 have the advantages of simple structure and convenience in molding and preparation.
In some possible implementations, as shown in fig. 1, the upper and lower water stop blocks 602 and 603 are offset from each other, so that the upper and lower ball seats 2 and 3 are more reasonably designed in the valve body 1.
The embodiment of the utility model provides an in, water blocking piece 6 adopts integrated into one piece's mode preparation to obtain.
Further, in the recharge-raise conversion valve provided by the embodiment of the present invention, the outlet end of the raise channel 8 and the port of the outlet end of the raise channel 8 are provided with chamfers. By providing the chamfer, it is facilitated to make the lower water stop block 603 more easily enter the outlet end of the pumping-up channel 8 when rotating downward with the water stop 6.
The embodiment of the utility model provides an in, the lateral part of the manger plate body 601 of manger plate 6 and the inner wall rotatable coupling of lower ball seat 3 to it can upwards rotate under the rivers effect to be convenient for manger plate 6, and rotates downwards under the action of gravity. The rotatable connection between the water deflector body 601 and the lower ball seat 3 is described as follows:
as shown in fig. 3, the side of the water blocking body 601 is provided with a first connecting platform 604, and the first connecting platform 604 is provided with a first shaft hole; the inner side of the lower ball seat 3 is provided with a second connecting platform 301, and the second connecting platform 301 is provided with a second shaft hole; one of the first connection stage 604 and the second connection stage 301 has a caulking groove, and the other is fitted into the caulking groove so that the first shaft hole communicates with the second shaft hole. The recharge-recharge switching valve also comprises a rotating shaft 9, and the rotating shaft 9 is positioned in a first shaft hole and a second shaft hole which are communicated.
In some possible implementations, a slot is disposed on the first connecting platform 604, the second connecting platform 301 is embedded in the slot, and the rotating shaft 9 is rotatably disposed inside the first shaft hole and the second shaft hole on the first connecting platform 604 and the second connecting platform 301, so that the first connecting platform 604 and the second connecting platform 301 can be rotatably connected.
Further, two ends of the rotating shaft 9 may be respectively provided with a limiting member, such as a limiting nut, to further ensure that the rotating shaft 9 is always located inside the shaft hole.
In the embodiment of the utility model, the upper end of the valve body 1 is connected with the lower end of the upper joint 4 by screw thread; the lower end of the valve body 1 is in threaded connection with the upper end of the lower ball seat 3; the lower end of the lower ball seat 3 is connected with the upper end of the lower joint 5 through threads.
For example, the upper end of the valve body 1 has a first external thread, and the lower end of the upper joint 4 has a first internal thread matching with the first external thread. The lower end of the valve body 1 is provided with a second internal thread, and the upper end of the lower ball seat 3 is provided with a second external thread matched with the second internal thread. The lower end of the lower ball seat 3 is provided with a third external thread, and the upper end of the lower joint 5 is provided with a third internal thread matched with the third external thread.
Furthermore, the upper end of the upper joint 4 and the recharge pipe are also in threaded connection, and the lower end of the lower joint 5 and the return pump are also in threaded connection. The threaded connection mode has the advantages of convenience in preparation and disassembly and assembly.
In some possible implementations, embodiments of the present invention provide a recharge-recharge switching valve, as shown in fig. 1-3, comprising: the water-retaining valve comprises a valve body 1, an upper ball seat 2, a lower ball seat 3, an upper joint 4, a lower joint 5 and a water retaining piece 6; the upper end of the valve body 1 is in threaded connection with the lower end of the upper joint 4, and the upper end of the upper joint 4 is configured to be in threaded connection with a recharge pipe; the lower end of the valve body 1 is in threaded connection with the upper end of the lower ball seat 3, the lower end of the lower ball seat 3 is in threaded connection with the upper end of the lower joint 5, and the lower end of the lower joint 5 is configured to be used for threaded connection with a lift-up pump.
The upper ball seat 2 is positioned on the inner side wall of the valve body 1, the side wall of the valve body 1 and the upper ball seat 2 are provided with a recharging channel 7 communicated along the radial direction, and the recharging channel 7 is communicated with the inner cavity of the valve body 1; the bottom of the lower ball seat 3 is provided with a pumping channel 8 communicated along the axial direction, and the pumping channel 8 is communicated with the inner cavity of the valve body 1.
The water deflector 6 includes: the water retaining device comprises a water retaining body 601, an upper water retaining block 602 and a lower water retaining block 603, wherein the side part of the water retaining body 601 is rotatably connected with the inner wall of the lower ball seat 3; the upper water blocking block 602 is connected with the upper end of the water blocking body 601, and the upper water blocking block 602 is configured to block the recharge channel 7; the lower water blocking block 603 is connected with the lower end of the water blocking body 601, and the lower water blocking block 603 is configured to block the pumping-up channel 8.
The inlet end of the recharge channel 7 is obliquely arranged, and the port of the inlet end of the recharge channel 7 is provided with a chamfer. The recharging channel 7 is a cylindrical channel, and the upper water blocking block 602 is a hemispherical block body matched with the recharging channel 7 in structure.
The pumping-up channel 8 is a cylindrical channel, and the lower water blocking block 603 is a hemispherical block body matched with the structure of the recharging channel 7. And, the outlet end of the pumping channel 8, the port of the outlet end of the pumping channel 8 is provided with a chamfer.
The side part of the water retaining body 601 is provided with a first connecting table 604, and the first connecting table 604 is provided with a first shaft hole; the lower ball seat 3 has a second connecting platform 301 on the inner side thereof, and the second connecting platform 301 has a second shaft hole. One of the first connection stage 604 and the second connection stage 301 has a caulking groove, and the other is inserted into the caulking groove so that the first shaft hole communicates with the second shaft hole; the recharge-recharge switching valve also comprises a rotating shaft 9, and the rotating shaft 9 is positioned in a first shaft hole and a second shaft hole which are communicated.
In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A recharge-recharge diverter valve, characterized in that it comprises: the water-retaining valve comprises a valve body, an upper ball seat, a lower ball seat, an upper joint, a lower joint and a water retaining piece;
the upper end of the valve body is connected with the lower end of the upper joint, and the upper end of the upper joint is configured to be connected with a recharging pipe;
the lower end of the valve body is connected with the upper end of the lower ball seat, the lower end of the lower ball seat is connected with the upper end of the lower joint, and the lower end of the lower joint is configured to be connected with a lifting pump;
the upper ball seat is positioned on the inner side wall of the valve body, the side wall of the valve body and the upper ball seat are provided with a recharging channel communicated along the radial direction, and the recharging channel is communicated with the inner cavity of the valve body;
the bottom of the lower ball seat is provided with a lifting channel communicated along the axial direction, and the lifting channel is communicated with the inner cavity of the valve body;
the water blocking member includes: the water retaining device comprises a water retaining body, an upper water retaining block and a lower water retaining block, wherein the side part of the water retaining body is rotatably connected with the inner wall of the lower ball seat;
the upper water blocking block is connected with the upper end of the water blocking body and is configured to be used for blocking the recharge channel;
the lower water blocking block is connected with the lower end of the water blocking body and is configured to be used for blocking the pumping-back channel.
2. The recharge-to-recharge switching valve according to claim 1, wherein a cross-sectional area of a first end of said upper ball seat is greater than a cross-sectional area of a second end of said upper ball seat;
the first end of the upper ball seat is the end of the upper ball seat connected with the inner side wall of the valve body;
the second end of the upper ball seat is the other end of the upper ball seat, which is far away from the inner side wall of the valve body.
3. The recharge-to-recharge switching valve according to claim 2, wherein the inlet end of the recharge passageway is arranged obliquely.
4. The recharge-to-recharge switching valve according to claim 2, wherein the port of the inlet end of the recharge channel is provided with a chamfer.
5. The recharge-recharge switching valve according to claim 1, wherein said recharge channel is a cylindrical channel and said upper water block is a hemispherical block structurally adapted to said recharge channel.
6. The recharge-recharge switching valve according to claim 1, wherein said recharge channel is a cylindrical channel and said lower water block is a hemispherical block adapted to the structure of said recharge channel.
7. The recharge-to-recharge switching valve according to claim 6, wherein the outlet end of the recharge channel, the port of the outlet end of the recharge channel is provided with a chamfer.
8. The recharge-recharge changeover valve according to claim 1, wherein the side of the water blocking body has a first connection table having a first shaft hole thereon;
the inner side of the lower ball seat is provided with a second connecting platform, and a second shaft hole is formed in the second connecting platform;
one of the first connecting table and the second connecting table is provided with an embedding groove, and the other one of the first connecting table and the second connecting table is embedded into the embedding groove so that the first shaft hole is communicated with the second shaft hole;
the recharge-raise conversion valve also comprises a rotating shaft, and the rotating shaft is positioned in the first shaft hole and the second shaft hole which are communicated.
9. The recharge-to-recharge changeover valve according to claim 1, wherein the upper end of the valve body is threadedly connected with the lower end of the upper joint;
the lower end of the valve body is in threaded connection with the upper end of the lower ball seat;
the lower end of the lower ball seat is in threaded connection with the upper end of the lower joint.
10. The recharge-to-recharge switching valve according to claim 1, wherein said upper and lower water blocks are staggered with respect to each other.
CN202022555492.4U 2020-11-06 2020-11-06 Recharge-raise change-over valve Active CN214093144U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022555492.4U CN214093144U (en) 2020-11-06 2020-11-06 Recharge-raise change-over valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022555492.4U CN214093144U (en) 2020-11-06 2020-11-06 Recharge-raise change-over valve

Publications (1)

Publication Number Publication Date
CN214093144U true CN214093144U (en) 2021-08-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022555492.4U Active CN214093144U (en) 2020-11-06 2020-11-06 Recharge-raise change-over valve

Country Status (1)

Country Link
CN (1) CN214093144U (en)

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