Expansion check valve and fluid delivery control structure with expansion check valve

Abstract

The present invention discloses an expansion check and a fluid delivery control structure with the expansion check, including a fluid delivery pump and a fluid delivery pipe, one end of the fluid delivery pipe is connected to the outlet of the fluid delivery pump, an expansion bag is fixedly installed at the other end of the fluid delivery pipe, the fluid delivery pipe is inserted into the expansion bag, the end of the fluid delivery pipe extends out of the expansion bag, and a variable diameter narrow mouth pipe is provided at the end of the fluid delivery pipe, the two ends of the expansion bag are sealed with the fluid delivery pipe, and a pressure relief opening is opened on the fluid delivery pipe located inside the expansion bag. By installing the expansion check between two fluid containers, the control of the two-way delivery of the fluid medium in the two fluid containers is realized. In the expansion check structure of the present invention, a water pump or a fan is used to increase the pressure of the fluid in the expansion check, so that the expansion bag is deformed to form a partition space at the position where the check is installed, and the purpose of controlling the fluid in the pipeline to be on, off and switch the flow direction is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid delivery control, and in particular to an expansion check and a fluid delivery control structure with the expansion check. Background Art

[0002] The check device of the existing pipeline generally adopts a check valve, which does not have the functions of two-way flow, two-way check and check direction switching.

[0003] The general fluid distribution and regulation requires multiple pipes and valve groups, and the system is relatively complex. In some non-destructive pipeline installation processes, the pipeline surface cannot be damaged or mechanically connected to ensure that the surface of the installed pipeline is smooth and flat. Currently, there is no corresponding technical measure to make such pipelines have adjustable functions. Summary of the invention

[0004] The purpose of the present invention is to remedy the defects of the prior art and to provide an expansion check and a fluid distribution control structure with the expansion check.

[0005] The present invention is achieved through the following technical solutions:

[0006] An expansion check device includes a fluid delivery pump and a fluid delivery pipe, one end of the fluid delivery pipe is connected to the outlet of the fluid delivery pump, an expansion bag is fixedly installed at the other end of the fluid delivery pipe, the fluid delivery pipe is inserted into the expansion bag, the end of the fluid delivery pipe extends out of the expansion bag, and a variable diameter narrow-mouth pipe is provided at the end of the fluid delivery pipe, both ends of the expansion bag are sealed and connected to the fluid delivery pipe, and a pressure relief opening is opened on the fluid delivery pipe located inside the expansion bag.

[0007] A check valve is installed on the fluid delivery pipe, and the check valve is located between the fluid delivery pump and the expansion bag.

[0008] The fluid delivery pump is a water pump or an air pump.

[0009] A fluid delivery control structure with an expansion check includes two fluid containers. The expansion check is installed between the two fluid containers to achieve bidirectional delivery control of the fluid medium in the two fluid containers. The number of expansion check can be combined and installed according to actual needs.

[0010] The two fluid containers include container 1 and container 2. Container 1 and container 2 have different heights. An opening is opened at the bottom of the side of container 2 and connected with a pipeline. The other end of the pipeline is connected with the inlet and outlet of container 1. The fluid delivery pump of the expansion check is installed in container 1. The expansion bag of the expansion check is located inside the pipeline. When the fluid in container 2 is delivered to container 1: the fluid delivery pump is not started, the expansion bag is in a pressure-free contraction state and releases the space in the pipeline. The fluid in container 2 flows to container 1 by gravity. When the fluid in container 1 is delivered to container 2: the fluid delivery pump is started, and the fluid flows through the fluid delivery pipe through the expansion bag and reaches the variable diameter narrow mouth pipe. Due to the large resistance of the variable diameter narrow mouth pipe, the outflow of the fluid is blocked. The fluid retained at the pressure release opening escapes into the expansion bag, causing the internal pressure to rise and put it in a pressurized expansion state. The expanded expansion bag cuts off the channel of the pipeline, so that the fluid in container 2 cannot flow to container 1. The fluid in the variable diameter narrow mouth pipe continues to be injected into container 2 from the variable diameter narrow mouth pipe, so as to achieve the purpose of delivering the fluid from container 1 to container 2. When the fluid is a gas lighter than air, the height of container two is lower than that of container one.

[0011] The two fluid containers include container three and container four, container three and container four are connected as a whole through a horizontal channel, two expansion checkers are installed between container three and container four, the fluid delivery pumps of the two expansion checkers are respectively installed in container three and container four, and the expansion bags of the two expansion checkers are respectively located in the horizontal channels;

[0012] (1) Single pump operation: When the fluid delivery pump in container three is started, the corresponding expansion bag expands, and the fluid in container three is delivered to container four; when the fluid delivery pump in container four is started, the corresponding expansion bag expands, and the fluid in container four is delivered to container three;

[0013] (2) Dual pump isobaric operation: When the two fluid delivery pumps are started at the same time, the two expansion bags expand and form a pressurized space between the two expansion bags. Since the two expansion bags are of equal pressure, the fluid stops between the two expansion bags and reaches a steady state. The medium does not flow back under the action of the check valve, and the horizontal channel is blocked.

[0014] (3) Dual pump non-isobaric operation condition: When the two fluid delivery pumps are started at the same time, the two expansion bags expand and form a pressurized space between the two expansion bags. One of the fluid delivery pumps has a higher lift than the other, resulting in unequal pressures in the expansion bags on both sides. Therefore, the fluid in the high-pressure side expansion bag compresses the gap between the low-pressure side expansion bag and the horizontal channel and causes the low-pressure side expansion bag to shrink. The flow channel on the compressed side is opened, and the high- and low-pressure side fluids flow to the low-pressure side through the formed channel at the same time.

[0015] The present invention utilizes fluid pressure to deform the expansion structure, thereby realizing the opening and closing, flow regulation, flow direction regulation, and forward and reverse bidirectional check functions of the pipeline;

[0016] The principle structure described in the present invention can function as a one-way valve or a multi-way valve or a combined valve group, and can be used together to achieve the purpose of one-way or multi-way medium distribution regulation;

[0017] The present invention can realize the installation of pipelines without damage.

[0018] The advantages of the present invention are: 1. The expansion check structure of the present invention utilizes a water pump or a fan to increase the pressure of the fluid in the expansion check, so that the expansion bag is deformed to form a partition space at the position where the check is installed, and achieves the purpose of controlling the flow, disconnection and flow direction switching of the fluid in the pipeline; this function solves the automatic control of the flow, disconnection and two-way flow of the pipeline, and does not need to adopt the installation method of a damaged pipeline.

[0019] 2. The present invention can partially or completely replace the use of check valves and multi-way valves, reduce the number of system parts and components used, and reduce the maintenance rate of the system; to first allow conventional pipelines to achieve multi-directional flow or cutoff, a number of pipelines and valve groups are required to form a fluid distribution network. The present invention only requires one pipeline to achieve the above function, which reduces the cost, simplifies the pipeline, reduces the use of spare parts, and improves the stability of the system.

[0020] 3. The present invention can use the pressure principle to establish the fluid delivery logic between multiple containers; the pressure control logic can be set according to the specific application needs to achieve the control purpose.

[0021] 4. The present invention can be used for the transformation of existing pipelines. In some places, only one pipeline can be installed or no more pipelines can be installed, but the process requires the circulation of multiple media or the change of the medium flow direction or the control of the on-off of the pipeline. At this time, the present device can be used to achieve the purpose of multi-directional control of the pipeline.

[0022] 5. The present invention can be used for two-way flow and cutoff between containers that can only be connected by a single pipeline; in some places, only one pipeline can be installed, but the process requires the flow of multiple media or the change of the medium flow direction or the control of the pipeline on and off. At this time, the device can be used to achieve the purpose of multi-directional control of the pipeline.

[0023] 6. The present invention can be used for the distribution of non-leakable media; some media have very high safety performance requirements, and the media in the pipeline cannot leak out or penetrate, so this device can be used in combination.

[0024] 7. It can be used for medium control of unbreakable pipelines. Some pipelines require that the surface must not be damaged, or that the pipeline surface must be smooth and flat, so the valve group cannot be installed in a damaged manner. In this case, the method of the present invention built into the pipeline can solve the problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the expansion check device of the present invention.

[0026] Figure 2 The figure is a schematic diagram of a fluid distribution control structure with an expansion check valve when two containers are not at the same height.

[0027] Figure 3 It is a schematic diagram of the fluid distribution control structure under single-pump operation conditions and dual-pump equal-pressure operation conditions.

[0028] Figure 4 It is a schematic diagram of the fluid distribution control structure under the non-isobaric operation conditions of dual pumps. DETAILED DESCRIPTION

[0029] like Figure 1 As shown, an expansion check device includes a fluid delivery pump 1 and a fluid delivery pipe 2, one end of the fluid delivery pipe 2 is connected to the outlet of the fluid delivery pump 1, and an expansion bag 3 is fixedly installed at the other end of the fluid delivery pipe 2, the fluid delivery pipe 2 is inserted into the expansion bag 3, and the end thereof extends out of the expansion bag 3, and a variable diameter narrow-mouth pipe 4 is provided at the end of the fluid delivery pipe 2, both ends of the expansion bag 3 are sealedly connected to the fluid delivery pipe 2, and a pressure relief opening 5 is opened on the fluid delivery pipe 2 located inside the expansion bag 3.

[0030] A check valve 6 is installed on the fluid delivery pipe 2, and the check valve 6 is located between the fluid delivery pump 1 and the expansion bag 3. The check valve 6 is required for bidirectional and multi-directional flow, and the check valve 6 can be installed according to actual needs in other cases.

[0031] The fluid delivery pump 1 is a water pump or an air pump.

[0032] A fluid delivery control structure with an expansion check includes two fluid containers. The expansion check is installed between the two fluid containers to achieve bidirectional delivery control of the fluid medium in the two fluid containers. The number of expansion check can be combined and installed according to actual needs.

[0033] like Figure 2As shown, the two fluid containers include container 1 7 and container 2 8. Container 1 7 and container 2 8 have different heights. An opening is opened at the bottom of the side of container 2 8 and is connected to a pipeline 9. The other end of the pipeline 9 is connected to the inlet and outlet of container 1 7. The fluid delivery pump 1 of the expansion check device is installed in container 1 7. The expansion bag 3 of the expansion check device is located inside the pipeline 9. When the fluid in container 2 8 is delivered to container 1 7: the fluid delivery pump 1 is not started, the expansion bag 3 is in a pressure-free contraction state and releases the space in the pipeline 9. The fluid in container 2 8 flows to container 1 7 by gravity; when When the fluid in container 1 7 is transported to container 2 8: the fluid transport pump 1 is started, and the fluid flows through the fluid transport pipe 2, the expansion bag 3, and then reaches the variable diameter narrow mouth pipe 4. Due to the large resistance of the variable diameter narrow mouth pipe 4, the fluid outflow is blocked, and the fluid retained at the pressure release opening 5 escapes into the expansion bag 3, causing the internal pressure to rise and put it in a pressurized expansion state. The expanded expansion bag 3 cuts off the passage of the pipeline 9, so that the fluid in container 2 8 cannot flow to container 1 7, and the fluid in the variable diameter narrow mouth pipe continues to be injected into container 2 8 from the variable diameter narrow mouth pipe, so as to achieve the purpose of transporting the fluid from container 1 7 to container 2 8. When the fluid is a gas lighter than air, the height of container 2 8 is lower than container 1 7.

[0034] The two fluid containers include a container 3 10 and a container 4 11, and the container 3 10 and the container 4 11 are connected as a whole through a horizontal channel 12, and two expansion check valves are installed between the container 3 10 and the container 4 11, and the fluid delivery pumps 1 of the two expansion check valves are respectively installed in the container 3 10 and the container 4 11, and the expansion bags 3 of the two expansion check valves are respectively located in the horizontal channel 12;

[0035] like Figure 3 As shown, (1) single pump operation: when the fluid delivery pump in container three 10 is started, the corresponding expansion bag expands, and the fluid in container three 10 is delivered to container four 11; when the fluid delivery pump in container four 11 is started, the corresponding expansion bag expands, and the fluid in container four 11 is delivered to container three 10;

[0036] (2) Dual pump isobaric operation: When the two fluid delivery pumps are started at the same time, the two expansion bags expand and form a pressurized space between the two expansion bags. Since the two expansion bags are of equal pressure, the fluid stops between the two expansion bags and reaches a steady state. The medium does not flow back under the action of the check valve, and the horizontal channel 12 is blocked.

[0037] like Figure 4As shown, (3) dual-pump non-isobaric operating condition: when the two fluid delivery pumps are started at the same time, the two expansion bags expand and form a pressurized space between the two expansion bags. One of the fluid delivery pumps has a higher head than the other fluid delivery pump, resulting in unequal pressure in the expansion bags on both sides. Therefore, the fluid in the high-pressure side expansion bag compresses the gap between the low-pressure side expansion bag and the horizontal channel 12 and causes the low-pressure side expansion bag to shrink. The flow channel on the compressed side is opened, and the high- and low-pressure side fluids simultaneously flow to the low-pressure side through the formed channel.

[0038] The fluid is gas or water, and the container is a pool or a gas container.

Claims

1. A fluid delivery control structure with an expansion check, characterized in that: It comprises two fluid containers, and the expansion check device is installed between the two fluid containers to realize the bidirectional conveying control of the fluid medium in the two fluid containers; The expansion check device comprises a fluid delivery pump and a fluid delivery pipe, one end of the fluid delivery pipe is connected to the outlet of the fluid delivery pump, an expansion bag is fixedly installed at the other end of the fluid delivery pipe, the fluid delivery pipe is inserted into the expansion bag, the end of the fluid delivery pipe extends out of the expansion bag, and a variable diameter narrow mouth pipe is provided at the end of the fluid delivery pipe, the two ends of the expansion bag are sealed with the fluid delivery pipe, and a pressure release opening is opened on the fluid delivery pipe located inside the expansion bag; a check valve is installed on the fluid delivery pipe, and the check valve is located between the fluid delivery pump and the expansion bag; the fluid delivery pump is a water pump or an air pump; The two fluid containers include container three and container four, which are connected as a whole through a horizontal channel. Two expansion check valves are installed between container three and container four. The fluid delivery pumps of the two expansion check valves are installed in container three and container four respectively, and the expansion bags of the two expansion check valves are located in the horizontal channel respectively; (1) single pump operation condition: when the fluid delivery pump in container three is started, the corresponding expansion bag expands, and the fluid in container three is delivered to container four; when the fluid delivery pump in container four is started, the corresponding expansion bag expands, and the fluid in container four is delivered to container three; (2) dual pump isobaric operation condition: when the two fluid delivery pumps are started at the same time, the two Both expansion bags expand and form a pressurized space between the two expansion bags. Since the two expansion bags are at equal pressure, the fluid stops between the two expansion bags and reaches a steady state. The medium does not flow back under the action of the check valve, and the horizontal channel is blocked. (3) Dual pump non-isobaric operation: When the two fluid delivery pumps are started at the same time, the two expansion bags expand and form a pressurized space between the two expansion bags. The head of one fluid delivery pump is higher than that of the other fluid delivery pump, resulting in unequal pressure in the expansion bags on both sides. Therefore, the fluid in the high-pressure side expansion bag compresses the gap between the low-pressure side expansion bag and the horizontal channel and causes the low-pressure side expansion bag to shrink. The compressed side flow channel is opened, and the high- and low-pressure side fluids flow to the low-pressure side through the formed channel at the same time.

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