CN212107035U - Adjustable connecting valve and pipeline system - Google Patents

Abstract

The utility model discloses a connecting valve with adjustable, include: the hot valve body comprises a first water inlet, a first water outlet and a first connecting port, an adjusting valve core is arranged on the first communicating pipeline, and the adjusting valve core is used for adjusting the opening degree of the first communicating pipeline; the cold valve body comprises a second water inlet, a second water outlet and a second connecting port; the second communication pipeline is provided with a one-way valve core; a flow limiting valve core is arranged on the cold water pipeline; and the two ends of the communicating pipe are respectively connected with the first connector and the second connector, and the first communicating pipeline is communicated with the second communicating pipeline through the communicating pipe. The utility model discloses an increase the restriction valve on the cold water pipeline and increase the regulation case on first communication pipeline, can effectively overcome the mistake start-up condition of water heater. And simultaneously, the utility model also provides a pipe-line system who has used above-mentioned connecting valve.

Description

Adjustable connecting valve and pipeline system

Technical Field

The utility model relates to a connecting valve and pipe-line system among water heater technical field, especially water heater.

Background

Traditional water heater system mostly does not possess "zero cold water" function, uses up the back at every turn, can reserve partly hot water in the hot-water line, before next use, this part hot water can slowly become cold, need just can normal use hot water after exhausting this part cold water, not only can cause the waste of water resource, can make the process of user operation water heater system comparatively loaded down with trivial details moreover.

Therefore, a novel water heater capable of being opened and heated instantly appears on the market, and the basic principle is that a water pump is added in a common water heater, and the water pump circulates hot water cooled in a hot water pipe, so that the water heater is triggered to be started to heat, and the function of zero cold water in a pipeline is realized. In addition, a hot water circulating device matched with a traditional gas water heater is also arranged on the market at present, and works by adopting the principle, and the difference is that the hot water circulating device is independent of the water heater, is more flexible in the aspects of installation function and the like, and can achieve the purpose of modifying the original common hot water system into an instant heating circulating system without purchasing an expensive zero-cold water heater.

However, the hot water circulation device has at least the following problems. The hot water circulating device generally comprises a connecting valve, wherein the connecting valve is provided with a hot water inlet, a cold water inlet, a hot water outlet and a cold water outlet, the two water inlets are connected with an angle valve through a corrugated pipe, the water outlet is connected with a water consumption point, the connecting valve is generally connected through the corrugated pipe, the connecting valve is large in size, heavy in weight, high in cost and inconvenient to install in a narrow space, and the connecting valve is supported by the corrugated pipe and is not stable as a whole; meanwhile, the cold water outlet of the connecting valve is easy to cause the false start condition of the water heater when cold water is used.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: it is an object of the present invention to provide a coupling valve that solves one or more of the problems of the prior art, at least providing a useful alternative or creation.

The utility model provides a solution of its technical problem is: an adjustable connecting valve comprising: the hot valve body comprises a first water inlet, a first water outlet and a first connecting port, a hot water pipeline is formed between the first water inlet and the first water outlet, the first connecting port is communicated with the hot water pipeline, and a first communicating pipeline is formed between the first connecting port and the hot water pipeline; an adjusting valve core is arranged on the first communication pipeline and used for adjusting the opening of the first communication pipeline; the cold valve body comprises a second water inlet, a second water outlet and a second connecting port, a cold water pipeline is formed between the second water inlet and the second water outlet, the second connecting port is communicated with the cold water pipeline, and a second communicating pipeline is formed between the second connecting port and the cold water pipeline; the second communication pipeline is provided with a one-way valve core; a flow limiting valve core is arranged on the cold water pipeline; and the two ends of the communicating pipe are respectively connected with the first connector and the second connector, and the first communicating pipeline is communicated with the second communicating pipeline through the communicating pipe.

The utility model has the advantages that: the utility model discloses an increase the restriction valve on the cold water pipeline and increase the regulation case on first communication pipeline, can effectively overcome the mistake start-up condition that leads to the water heater when using cold water.

When the water heater is used, if the water supply pressure in a user's home is too high, when the switch of the water heater is turned on and the cold water function is selected for use, the flow of cold water in the cold water pipeline is large, so that the pressure difference between two ends of the one-way valve core is large, the one-way valve core can be caused to be turned on by mistake, water in the hot water pipeline enters the second communication pipeline after passing through the first communication pipeline and flows to the cold water pipeline after passing through the one-way valve, and the water heater can be turned on by mistake at the moment. The utility model discloses technical scheme is through setting up the current-limiting valve core in cold water pipeline, can effectively reduce the flow of cold water, still guarantee cold water outflow flow invariable when cold water pipe pressure fluctuates to some extent, cooperate the regulation case on the first communication pipeline simultaneously, reduce the aperture of first communication pipeline through the regulation valve core, rivers in the increase hot water pipeline are to the pipe resistance of cold water pipeline, under the combined action of current-limiting valve core and regulation case, can effectively eliminate the phenomenon that leads to the water heater to start with cold water.

As a further improvement of the above technical solution, an adjusting valve seat is provided on the hot valve body, the first communication pipeline is located in the adjusting valve seat, the adjusting valve seat is provided with a through hole, and the adjusting valve core is installed in the through hole.

As a further improvement of the above technical solution, the through hole is a circular hole, the regulating valve core includes a cylindrical core body, a regulating port is provided at the rear of the core body, the regulating port penetrates through the core body, and the regulating port is located on the first communication pipeline; the front end face of the core body is provided with an adjusting groove. The core body is driven to rotate by rotating the adjusting groove by using an external tool (such as a screwdriver), and the adjusting interface can be synchronously rotated when the core body rotates. It can be understood that because the periphery of core plugs up first intercommunication pipeline, rivers can only be through transferring the mouth circulation, when transferring the mouth through the rotation, can effectively adjust the flow area of first intercommunication pipeline to the realization is adjusted the aperture of first circulation pipeline. Because the water pressure of different end users is different, and the restriction valve core is generally nonadjustable, in order to adapt to different water pressures, the requirement of different use scenes can be met by adjusting the opening degree of the first circulation pipeline. For example, when adjusting, firstly, the adjusting valve core is adjusted to the maximum opening, and when the water heater is started by mistake when cold water (such as a toilet, a washing machine and the like) is used, the adjusting valve core can be rotated to gradually reduce the opening of the valve core until the phenomenon that the water heater is started disappears. Because the core body is integrally connected with the through hole in a shaft mode, the adjustment is stepless adjustment, and the application range is wide.

As a further improvement of the above technical scheme, the core body is further provided with a limit groove, the limit groove is arc-shaped, the adjusting valve seat is provided with a limit screw, and the limit screw penetrates through the adjusting valve seat and then is connected with the limit groove. Through set up the spacing groove on the core, can realize the control to the rotation angle of core, avoid the core excessive rotation for it is more convenient to adjust.

Besides the above structure, the regulating valve core may also have the following structure: the adjusting valve seat is also internally provided with a sliding groove, the front end of the through hole is provided with an internal thread, the adjusting valve core comprises a sliding block and an adjusting column, the sliding block is connected with the sliding groove in a sliding manner, the sliding block is provided with an adjusting port, the adjusting port penetrates through the sliding block, and the sliding track where the adjusting port is located is intersected with the first communicating pipeline; one end of the sliding block is in shaft connection with the adjusting column, external threads are arranged on the adjusting column, the adjusting column is in threaded connection with the through hole, and an adjusting groove is formed in the front end face of the adjusting column. When the opening of the first communication pipeline needs to be adjusted, the adjusting column is rotated, the adjusting column is in threaded connection with the adjusting valve seat, the adjusting column can move back and forth, so that the sliding block is driven to slide back and forth, and the adjusting port on the sliding block can adjust the opening of the first communication pipeline when sliding back and forth. For example, in the initial state, the adjusting port is completely located on the first communicating pipe, the opening degree is the largest at the moment, when the adjusting column is rotated, the sliding block slides backwards to drive the adjusting port to slide backwards, the intersecting area of the adjusting port and the first communicating pipe is reduced at the moment, water flow can be communicated through the adjusting port, and therefore the opening degree of the first communicating pipe can be reduced. Of course, besides the two solutions, the regulating valve core may also be other regulating valve core structures in the prior art, such as a fan-shaped valve core.

As a further improvement of the above technical scheme, the cold valve body is further provided with a hole circlip, the second water outlet is provided with a positioning step and a mounting groove, the hole circlip is connected with the mounting groove, one end of the flow limiting valve core is abutted against the positioning step, and the other end of the flow limiting valve core is abutted against the hole circlip. The flow limiting valve core is installed in the cold valve body in the detachable connection mode, and the flow limiting valve core is conveniently detached. In some application scenes, the adjusting valve core is not needed, and the adjusting valve core is only needed to be detached at the moment. Of course, the one-way valve core can be mounted on the cold valve body by the mounting structure.

As a further improvement of the above technical scheme, the first connector and the second connector are externally provided with external threads, the communicating pipe is a flexible corrugated pipe, the two ends of the communicating pipe are both provided with connectors, the connectors are internally provided with internal threads, and the connectors are respectively in threaded connection with the first connector and the second connector. The cold valve body is connected with the hot valve body through the corrugated pipe, so that the installation of the connecting valve is simplified.

As a further improvement of the technical scheme, a connecting nut is further arranged outside the first water inlet, a clamping groove is formed outside the hot valve body, and the connecting nut is connected with the hot valve body through a clamping spring. The heated valve body can be directly connected with an external angle valve through a connecting nut, and the installation of the connecting valve is further simplified. The cold valve body can also comprise the connecting structure, the cold valve body is directly connected with an external angle valve, and compared with the prior art, the cold valve body is not connected with the angle valve through a corrugated pipe, so that the water leakage risk and the installation cost of a joint are reduced.

And simultaneously, the utility model also provides a pipeline system, including hot water pipeline, cold water pipeline, communicate through foretell adjustable connecting valve between hot water pipeline and the cold water pipeline.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

FIG. 1 is a front view of a thermal valve body of the present invention;

FIG. 2 is a side cross-sectional view of the thermal valve body of the present invention;

FIG. 3 is a front cross-sectional view of the thermal valve body of the present invention;

FIG. 4 is an exploded view of the thermal valve body of the present invention;

fig. 5 is a front view of the cold valve body of the present invention;

FIG. 6 is a top view of the cold valve body of the present invention;

fig. 7 is a front cross-sectional view of the cold valve body of the present invention;

fig. 8 is an exploded view of the cold valve body of the present invention;

fig. 9 is a front view of the connection valve of the present invention;

fig. 10 is a schematic structural diagram of the piping system of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. The preferred embodiment of the present invention is shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution. Meanwhile, all technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.

The first embodiment is as follows: referring to fig. 1 to 9, an adjustable coupling valve includes a hot valve body 100, a cold valve body 200, and a communication pipe 300. The hot valve body 100 and the cold valve body 200 are integrated into a three-way pipe structure.

The hot valve body 100 includes a first water inlet 110, a first water outlet 120 and a first connection port 130, a hot water pipeline 101 is formed between the first water inlet 110 and the first water outlet 120, the first connection port 130 is communicated with the hot water pipeline 101, and a first communication pipeline 102 is formed between the first connection port 130 and the hot water pipeline 101; the hot water pipeline 101 is arranged up and down, the first communication pipeline 102 is arranged horizontally and left and right, the first water inlet 110 is located below, the first water outlet 120 is located above, and the first connection port 130 is located on the right. The hot valve body 100 is further provided with an adjusting valve seat 140, the adjusting valve seat 140 is arranged on the horizontal section of the hot valve body 100, the first communicating pipeline 102 is arranged in the adjusting valve seat 140, the adjusting valve seat 140 is provided with a circular through hole 141 which runs forward and backward, and the through hole 141 is intersected with the first communicating pipeline 102. The first communication pipe 102 is provided with a regulating valve core 400, and the regulating valve core 400 is installed on the through hole 141.

The adjusting valve core 400 comprises a cylindrical core body 410, an adjusting port 420 is arranged at the rear part of the core body 410, the adjusting port 420 penetrates through the core body 410, and the adjusting port 420 is positioned on the first communication pipeline 102; the front end surface of the core 410 is further provided with an adjusting groove 430. The core body 410 is further provided with a limiting groove 440, the limiting groove 440 is arc-shaped, the adjusting valve seat 140 is provided with a limiting screw 150, and the limiting screw 150 penetrates through the adjusting valve seat 140 and then is connected with the limiting groove 440. A sealing ring is further disposed between the core body 410 and the adjusting valve seat 140, and the sealing ring is located in front of the adjusting port 420 and behind the limiting groove 440.

The cold valve body 200 comprises a second water inlet 210, a second water outlet 220 and a second connecting port 230, a cold water pipeline 201 is formed between the second water inlet 210 and the second water outlet 220, the second connecting port 230 is communicated with the cold water pipeline 201, and a second communicating pipeline 202 is formed between the second connecting port 230 and the cold water pipeline 201; the cold water pipeline 201 is arranged up and down, the second communication pipeline 202 is arranged horizontally and left and right, the second water inlet 210 is positioned below, the second water outlet 220 is positioned above, the second connection port 230 is positioned on the left, the second connection port 230 faces the first connection port 130, external threads are arranged on the peripheries of the first connection port 130 and the second connection port 230, the communication pipe 300 is a flexible corrugated pipe, two ends of the communication pipe 300 are both provided with connectors 310, internal threads are arranged in the connectors 310, the two connectors 310 are respectively in threaded connection with the first connection port 130 and the second connection port 230, and a sealing ring is arranged in the connectors 310.

The second communication pipeline 202 is provided with a one-way valve core 500, and the one-way valve core 500 ensures that the water flow direction can only flow from the first communication pipeline 102 to the second communication pipeline 202; and a flow limiting valve core 600 is arranged on the second water outlet 220.

Referring to fig. 10, in operation, the hot valve body 100 is mounted to a hot water pipe, the cold valve body 200 is mounted to a cold water pipe, and then the hot valve body 100 and the cold valve body 200 are communicated by the bellows 300, thereby constituting a connection valve. In the conventional connection valve, when a user uses water, a water using point (for example, a tap) on the hot water pipe is opened, hot water flows out from the hot water pipe 101, and cold water flows out from the cold water pipe 201. In general, when a user turns on only cold water, the hot water line 101 and the first connection line 102 are in a closed state due to the check valve 500, and the water heater 10 does not feel that hot water is used, so the water heater 10 is not started. However, when there is a large amount of cold water (such as a toilet, a washing machine, etc.), the pressure in the cold water pipe 202 is reduced, and the reduction of the pressure is related to the flow rate of the cold water, and when the pressure in the cold water pipe 202 is reduced to a certain degree, the check valve 500 is opened by mistake, and the hot water in the first connection pipe 102 flows into the second connection pipe 202, so that the water heater is started by mistake.

And because the connecting valve of this scheme has set up restriction valve core 600 on cold water pipeline 202, set up regulation case 400 on first connecting line 102, utilize restriction valve core 600 to reduce the flow of cold water pipeline 202, restriction valve core 600's current-limiting effect is big more, cold water pipeline 202's pressure loss is just less, but too big current-limiting effect, can reduce the water consumption of this water consumption point, user's water use experience has been influenced, to this, this technical scheme utilizes regulation valve core 400 to increase the circulation pressure of first connecting line 102 simultaneously, under the combined action of both, guaranteed that one-way valve core 500 can not open by accident under the condition of not obviously reducing the water consumption.

Specifically, the one-way valve element 500 comprises a one-way valve seat 510, a one-way valve cover 520, a one-way valve plate 530 and a compression spring, wherein the one-way valve cover 520 is fixedly connected with the one-way valve seat 510, a cavity is formed between the one-way valve cover 520 and the one-way valve seat 510, the one-way valve plate 530 is installed in the cavity, one end of the one-way valve cover 520 is provided with a tapered inlet, the one-way valve plate 530 abuts against the inlet, and a sealing ring is arranged between the one-way valve plate 530 and; the bottom of one-way valve seat 510 is equipped with export and connecting seat, compression spring's one end and connecting seat butt, the other end and one-way valve plate 530 butt. A sealing ring for sealing connection with the inner wall of the second communication pipeline 202 is further arranged outside the one-way valve cover 520. When the one-way valve core works, the compression spring is used for providing pressure and the shape of the inlet, so that the one-way valve plate 530 seals the inlet to prevent water flow from flowing from right to left; when the water pressure on the left side is greater than the water pressure on the right side, the pressure overcomes the elastic force of the compression spring, so that the check valve plate 530 moves to the right, the inlet is opened, and the water flows into the cavity from the inlet and flows out from the outlet of the check valve seat 510. Specifically, the constrictor valve cartridge 600 includes a plurality of constrictor orifices. The flow limiting valve element 600 reduces the flow area, thereby achieving the flow limiting effect.

In a further preferred embodiment, the cold valve body 200 further includes a hole circlip 700, the second water outlet 220 includes a positioning step 221 and an installation groove 222, the hole circlip 700 is connected to the installation groove 222, the lower end of the flow restriction valve body 600 abuts against the positioning step 221, and the upper end of the flow restriction valve body 600 abuts against the hole circlip 700. The flow limiting valve core 600 is installed in the second water outlet by the elastic retainer ring 700 for hole, so that the flow limiting valve core 600 is convenient to take out. In some application scenarios, the cold valve body 200 is required to be used to connect a water heater, a water inlet pipe and a water return pipe, wherein the water heater is communicated with the second water outlet, and the current limiting valve core 600 is arranged in the existing cold valve body, and the current limiting valve core 600 influences the normal operation of the water heater, so the current limiting valve core 600 is required to be removed. When the lower flow limiting valve core 600 needs to be taken out, the elastic retainer ring 700 only needs to be taken out by using a caliper, and the flow limiting valve core 600 can be easily taken out from the upper part of the second water outlet.

Further as a preferred embodiment, the check valve cartridge 500 may also be mounted on the cold valve body 200 by using a circlip 700, which is similar to the mounting structure of the restriction valve cartridge 600.

Further as a preferred embodiment, a connection nut 800 is further arranged outside the first water inlet, the peripheries of the lower portions of the thermal valve bodies 100 are provided with clamping grooves 160, and the connection nut 800 is connected with the thermal valve body 100 through a clamping spring 900. Of course, the cold valve body 200 may be provided with the coupling nut 800.

Because the connecting valve is split into two independent valve body structures, and the two independent valve bodies are communicated through the flexible corrugated pipe, the connecting valve with small volume is more convenient to install in a narrow space, and the weight is lighter; and two independent valve bodies can be installed on the angle valve by utilizing the connecting nut 800, the corrugated pipe is not required to bear the weight, and the corrugated pipe connection is reduced and the water leakage risk and the installation cost of the connection part are reduced during application. The whole structure is simple, the production and the processing are convenient, and the production cost is low.

In a further preferred embodiment, the through hole 141 of the adjustment valve seat 140 may be through-penetrating in the front-rear direction, and the adjustment grooves may be provided on both the front and rear end surfaces of the core 410, so that the adjustment valve core 400 can be controlled on both the front side and the rear side. Meanwhile, in order to facilitate more intuitive adjustment, the end surface of the adjusted valve seat 140 is provided with scale marks, and the adjusting groove 430 is a straight groove, so that the opening of the first communicating pipeline can be conveniently adjusted by indicating the position of the adjusting groove.

Example two: the adjusting valve seat is also internally provided with a sliding groove, the front end of the through hole is provided with an internal thread, the adjusting valve core comprises a sliding block and an adjusting column, the sliding block is connected with the sliding groove in a sliding manner, the sliding block is provided with an adjusting port, the adjusting port penetrates through the sliding block, and the sliding track where the adjusting port is located is intersected with the first communicating pipeline; one end of the sliding block is in shaft connection with the adjusting column, external threads are arranged on the adjusting column, the adjusting column is in threaded connection with the through hole, and an adjusting groove is formed in the front end face of the adjusting column. The rest of the structure is the same as the embodiment.

In this embodiment, the adjusting valve core can slide back and forth integrally, so that the back and forth movement of the adjusting opening is realized, and when the adjusting opening moves back and forth, the opening adjustment of the first communicating pipeline can be realized.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims (9)

1. An adjustable connecting valve is characterized in that: the method comprises the following steps:

the hot valve body comprises a first water inlet, a first water outlet and a first connecting port, a hot water pipeline is formed between the first water inlet and the first water outlet, the first connecting port is communicated with the hot water pipeline, and a first communicating pipeline is formed between the first connecting port and the hot water pipeline; an adjusting valve core is arranged on the first communication pipeline and used for adjusting the opening of the first communication pipeline;

the cold valve body comprises a second water inlet, a second water outlet and a second connecting port, a cold water pipeline is formed between the second water inlet and the second water outlet, the second connecting port is communicated with the cold water pipeline, and a second communicating pipeline is formed between the second connecting port and the cold water pipeline; the second communication pipeline is provided with a one-way valve core; a flow limiting valve core is arranged on the cold water pipeline;

and the two ends of the communicating pipe are respectively connected with the first connector and the second connector, and the first communicating pipeline is communicated with the second communicating pipeline through the communicating pipe.

2. The adjustable connecting valve according to claim 1, wherein: the hot valve body is provided with an adjusting valve seat, the first communication pipeline is located in the adjusting valve seat, the adjusting valve seat is provided with a through hole, and the adjusting valve core is installed in the through hole.

3. The adjustable connecting valve according to claim 2, wherein: the through hole is a circular hole, the adjusting valve core comprises a cylindrical core body, the rear part of the core body is provided with an adjusting port, the adjusting port penetrates through the core body, and the adjusting port is positioned on the first communication pipeline; the front end face of the core body is provided with an adjusting groove.

4. The adjustable connecting valve according to claim 3, wherein: the core body is further provided with a limiting groove, the limiting groove is arc-shaped, the adjusting valve seat is provided with a limiting screw, and the limiting screw penetrates through the adjusting valve seat and then is connected with the limiting groove.

5. The adjustable connecting valve according to claim 2, wherein: the adjusting valve seat is also internally provided with a sliding groove, the front end of the through hole is provided with an internal thread, the adjusting valve core comprises a sliding block and an adjusting column, the sliding block is connected with the sliding groove in a sliding manner, the sliding block is provided with an adjusting port, the adjusting port penetrates through the sliding block, and the sliding track of the adjusting port is intersected with the first communicating pipeline; one end of the sliding block is in shaft connection with the adjusting column, external threads are arranged on the adjusting column, the adjusting column is in threaded connection with the through hole, and an adjusting groove is formed in the front end face of the adjusting column.

6. The adjustable connecting valve according to claim 1, wherein: the cold valve body is further provided with a hole elastic check ring, the second water outlet is internally provided with a positioning step and a mounting groove, the hole elastic check ring is connected with the mounting groove, one end of the flow limiting valve core is abutted against the positioning step, and the other end of the flow limiting valve core is abutted against the hole elastic check ring.

7. The adjustable connecting valve according to claim 1, wherein: the first connector and the second connector are externally provided with external threads, the communicating pipe is a flexible corrugated pipe, the two ends of the communicating pipe are respectively provided with a connector, the connector is internally provided with internal threads, and the connector is respectively in threaded connection with the first connector and the second connector.

8. The adjustable connecting valve according to claim 1, wherein: the hot valve body is characterized in that a connecting nut is further arranged outside the first water inlet, a clamping groove is formed outside the hot valve body, and the connecting nut is connected with the hot valve body through a clamping spring.

9. The utility model provides a pipeline system, includes hot water pipeline, cold water pipeline which characterized in that: comprising an adjustable connecting valve according to any one of the preceding claims 1-8, through which the hot water pipe and the cold water pipe communicate.

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