Isobaric adjustment system and method with height difference

Abstract

The present invention provides an isobaric adjustment system and method with a height difference, the system at least comprising a plurality of balancing regulating valves and liquid delivery main pipes arranged at different heights, the liquid inlet at the lower end of each balancing regulating valve is connected to a liquid delivery branch pipe, and the liquid delivery branch pipe is connected to the liquid delivery main pipe; the gas inlet at the lower end of each balancing regulating valve is provided with mutually connected external branches of the balancing regulating valve cavity. In the present invention, the liquid is input from the main pipe and then output at multiple points with different heights, and is automatically adjusted to be isobaric during output, and finally output at isobaric pressure. The present invention utilizes the characteristics of lightness and slight compression of gas, combines the relationship between flow pressure difference and flow cross section, and performs adaptive adjustment through the balancing regulating valve, thereby realizing adaptive adjustment without the need for electrical automation.

Description

Technical Field

[0001] The invention relates to the field of liquid medium transmission, and in particular to an isobaric adjustment system and method with height difference. Background Art

[0002] In the process of pipeline transportation of liquids, in order to save costs, they are generally transported through larger pipelines to the vicinity of the distribution point for branch transportation. If the branch point has the same pressure requirements, it is necessary to combine special valves and automation such as equivalent pressure detection and adjustment for adjustment and processing. The cost is high and there are many links. No matter which link has a problem, it will affect the normal operation of the system. In some environments, due to space limitations, the detection and adjustment valve body cannot be installed near the application point. If it is installed in a remote location and there is a height difference, it will be affected by the height difference of the liquid in the pipeline, and it is impossible to accurately ensure that the pressure of each application point is equal. This patent is aimed at this technical difficulty. It uses the characteristics of lightness and slight compression of gas, combined with the relationship between flow pressure difference and flow cross-section, to invent a low-cost, electrical automation-free adaptive adjustment system. Summary of the invention

[0003] In order to overcome the problem that the existing space limitation makes it impossible to accurately ensure that the pressure at each application point is equal, the present invention provides an isobaric adjustment system and method with a height difference. In the present invention, liquid is input from a main pipe and then output at multiple points with different heights. During the output, isobaric adjustment is automatically performed and finally an isobaric output is achieved. The present invention has low cost and does not require electrical automation.

[0004] The technical solution adopted in the present invention is:

[0005] A isobaric adjustment system with a height difference comprises at least a plurality of balancing regulating valves and liquid delivery main pipes arranged at different heights, wherein the liquid inlet at the lower end of each balancing regulating valve is connected to a liquid delivery branch pipe, and the liquid delivery branch pipe is communicated with the liquid delivery main pipe; and the gas inlet at the lower end of each balancing regulating valve is provided with a balancing regulating valve cavity external branch pipe which is communicated with each other.

[0006] The balancing regulating valve at least comprises a valve body and a valve core, wherein the valve core is located in the valve body and is slidably connected to the valve body; a liquid inlet and a gas inlet are arranged at the lower end of the valve body; and a liquid outlet is arranged at the upper end of the valve body.

[0007] The valve core separates the valve body into a liquid thrust chamber and a gas thrust chamber, the gas inlet is arranged on the valve body at the lower end of the gas thrust chamber, and the liquid inlet is arranged on the valve body at the lower end of the liquid thrust chamber.

[0008] The valve core is composed of five cylinders of different sizes; the five cylinders are the first cylinder, the second cylinder, the third cylinder, the fourth cylinder and the fifth cylinder from left to right; the diameters of the second cylinder and the fourth cylinder are the same, and are the same as the inner diameter of the valve body; the diameter of the third cylinder is smaller than the diameter of the second cylinder, and the diameters of the first cylinder and the fifth cylinder are smaller than the diameter of the third cylinder; the upper right end face of the second cylinder is located at the liquid outlet, the upper left end face of the second cylinder is sealingly and slidingly connected to the inner wall of the upper end of the valve body, and the lower end face of the second cylinder is located at the liquid inlet.

[0009] The annular space between the third cylinder and the valve body connects the liquid inlet with the liquid outlet.

[0010] The liquid inlet is communicated with the liquid thrust chamber.

[0011] The upper and lower ends of the fourth cylinder are both connected to the inner wall of the valve body in a sliding and sealing manner.

[0012] A method for isobaric adjustment with height difference, the specific steps are:

[0013] Step 1: Install the balancing regulating valve at multiple required positions with different heights, then connect the liquid delivery branch pipe corresponding to the lower end of the balancing regulating valve with the liquid delivery main pipe, and then connect the external branch pipes of the balancing regulating valve cavity corresponding to the lower end of the balancing regulating valve with each other; the liquid flows into the balancing regulating valve through the liquid inlet of the liquid delivery main pipe, a part of the liquid enters the liquid thrust cavity, and the other part flows out from the liquid outlet through the annulus between the third cylinder and the valve body; the closed external branch pipe of the balancing regulating valve cavity is connected with the gas inlet, enters the gas thrust cavity, and forms a thrust on the valve core;

[0014] Step 2: The balanced regulating valve moves to the side with less force due to the pressure of the respective liquid thrust chamber and gas thrust chamber, which changes the volume and pressure of the closed gas communication space. At the same time, the movement of the valve core causes the flow cross-section of the liquid thrust chamber and the liquid outlet of the balanced regulating valve to change, thereby adjusting the pressure of the liquid thrust chamber;

[0015] Step three, when there is a difference between the gas pressure in the closed gas thrust chamber and the liquid pressure in the liquid thrust chamber, balance is achieved after multiple adjustments in step two. The volume pressure of the gas connecting space is stable and equal, the valve core is also stable in a fixed position, and the pressure of the liquid thrust chamber of the balanced regulating valve is also equal.

[0016] The beneficial effects of the present invention are:

[0017] The present invention adjusts the flow section change of the liquid outlet by moving the valve core in the balance regulating valve, thereby adjusting the liquid thrust chamber pressure; in the adaptive automatic adjustment process where there is a difference between the closed gas pressure and the liquid thrust chamber pressure, the balance regulating valve is adjusted back and forth several times to achieve balance, the volume stable pressure of the gas connection space is equal, the valve core is also stabilized in a fixed position, and the liquid thrust chamber pressure of the balance regulating valve is also equal.

[0018] The invention has low cost and can realize equal pressure adjustment of height difference without automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following is a further description with reference to the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structural connection of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of a balancing control valve.

[0022] In the figure, the reference numerals are: 1, liquid delivery main pipe; 2, first liquid delivery branch pipe; 3, second liquid delivery branch pipe; 4, third liquid delivery branch pipe; 5, first balanced regulating valve cavity external branch pipe; 6, first balanced regulating valve; 7, second balanced regulating valve cavity external branch pipe; 8, second balanced regulating valve; 9, third balanced regulating valve cavity external branch pipe; 10, third balanced regulating valve; 11, valve body; 12, valve core; 13, liquid outlet; 14, liquid thrust chamber; 15, liquid inlet; 16, gas inlet; 17, gas thrust chamber; 18, balanced regulating valve. DETAILED DESCRIPTION

[0023] Embodiment 1:

[0024] In order to overcome the problem that the existing space is limited and the pressure at each application point cannot be accurately guaranteed to be equal, the present invention provides the following Figure 1 The shown is an isobaric adjustment system and method with height difference. In the present invention, liquid is input from a main pipe and then output at multiple points with different heights. When outputting, isobaric adjustment is automatically performed and finally isobaric output is achieved. The present invention has low cost and does not require electrical automation.

[0025] A isobaric adjustment system with a height difference comprises at least a plurality of balancing regulating valves 18 and a liquid delivery main pipe 1 arranged at different heights, wherein the liquid inlet 15 at the lower end of each balancing regulating valve 18 is connected to a liquid delivery branch pipe, and the liquid delivery branch pipe is connected to the liquid delivery main pipe 1; and the gas inlet 16 at the lower end of each balancing regulating valve 18 is provided with mutually connected external branches of the balancing regulating valve cavity.

[0026] The interconnected external branch pipes of the balance regulating valve cavity in the present invention are tightly connected to the balance regulating valve 18, thus ensuring the isobaricity of the sealed gas. The static pressure effects of liquids at different heights are also different. The balance regulating valve 18 in the system provided by the present invention can realize adaptive automatic adjustment balance. The present invention does not require electrical automation, saving costs.

[0027] Embodiment 2:

[0028] Based on Example 1, in this embodiment, preferably, the balancing regulating valve 18 at least includes a valve body 11 and a valve core 12, the valve core 12 is located in the valve body 11 and is slidably connected to the valve body 11; the lower end of the valve body 11 is provided with a liquid inlet 15 and a gas inlet 16; the upper end of the valve body 11 is provided with a liquid outlet 13.

[0029] Preferably, the valve core 12 separates the valve body 11 into a liquid thrust chamber 14 and a gas thrust chamber 17 , the gas inlet 16 is provided on the valve body 11 at the lower end of the gas thrust chamber 17 , and the liquid inlet 15 is provided on the valve body 11 at the lower end of the liquid thrust chamber 14 .

[0030] Preferably, the valve core 12 is composed of five cylinders of different sizes; the five cylinders are, from left to right, the first cylinder 1201, the second cylinder 1202, the third cylinder 1203, the fourth cylinder 1204 and the fifth cylinder 1205; the diameters of the second cylinder 1202 and the fourth cylinder 1204 are the same, and are the same as the inner diameter of the valve body 11; the diameter of the third cylinder 1203 is smaller than the diameter of the second cylinder 1202, and the diameters of the first cylinder 1201 and the fifth cylinder 1205 are smaller than the diameter of the third cylinder 1203; the upper right end face of the second cylinder 1202 is located at the liquid outlet 13, the upper left end face of the second cylinder 1202 is sealingly and slidably connected to the inner wall of the upper end of the valve body 11, and the lower end face of the second cylinder 1202 is located at the liquid inlet 15.

[0031] In the present invention, the five cylinders are located on the same central axis, and the total length of the five cylinders is smaller than the left-right length inside the valve body 11 , ensuring that the valve core 12 composed of the five cylinders can slide left-right inside the valve body 11 .

[0032] Preferably, the annulus between the third cylinder 1203 and the valve body 11 connects the liquid inlet 15 with the liquid outlet 13 .

[0033] Preferably, the liquid inlet 15 is communicated with the liquid thrust chamber 14 .

[0034] Preferably, both upper and lower ends of the fourth cylinder 1204 are slidably and sealingly connected to the inner wall of the valve body 11 .

[0035] like Figure 2 As shown, the balanced regulating valve 18 is composed of a valve body 11 and a valve core 12. The valve core 12 separates the two ends of the valve body 11 into a liquid thrust chamber 14 and a gas thrust chamber 17. The liquid with regulated pressure flows out from the liquid outlet 13, a part of which enters the liquid thrust chamber 14, and the other part flows out of the liquid outlet 13 through the liquid flow space in the middle of the valve core 12. The cross-sectional area of ​​the liquid outlet 13 automatically adjusts the cross-sectional area according to the balanced pressure; the closed gas pipeline is connected to the gas inlet 16, and enters the gas thrust chamber 17 to form a thrust on the valve core 12.

[0036] The present invention utilizes the characteristics of small gas density, small compression volume and ability to transmit pressure to establish balanced pressure adaptive regulation, thereby eliminating the problem of unequal output pressure caused by height difference of the valve body.

[0037] An isobaric adjustment method with height difference, the specific steps are:

[0038] Step 1: Install the balancing regulating valve 18 at multiple required positions at different heights, then connect the liquid delivery branch pipe corresponding to the lower end of the balancing regulating valve 18 to the liquid delivery main pipe 1, and then connect the balancing regulating valve cavity outer branch pipes corresponding to the lower end of the balancing regulating valve 18 to each other; liquid flows into the balancing regulating valve 18 through the liquid inlet 15 of the liquid delivery main pipe 1, and part of the liquid enters the liquid thrust chamber 14, and the other part flows out from the liquid outlet 13 through the annulus between the third cylinder 1203 and the valve body 11; the closed balancing regulating valve cavity outer branch pipe is connected to the gas inlet 16, and enters the gas thrust chamber 17 to form a thrust on the valve core 12;

[0039] Step 2: The balance regulating valve 18 is moved to the side with less force due to the pressure of the respective liquid thrust chamber 14 and gas thrust chamber 17, which changes the volume and pressure of the closed gas communication space. At the same time, the movement of the valve core 12 causes the flow cross-section of the liquid thrust chamber 14 and the liquid outlet 13 of the balance regulating valve 18 to change, thereby adjusting the pressure of the liquid thrust chamber 14;

[0040] Step three, when there is a difference between the gas pressure in the closed gas thrust chamber 17 and the liquid pressure in the liquid thrust chamber 14, the step two is adjusted multiple times to reach a balance, the volume of the gas connecting space is stable and the pressure is equal, the valve core 12 is also stabilized in a fixed position, and the pressure of the liquid thrust chamber 14 of the balance regulating valve 18 is also equal.

[0041] Embodiment 3:

[0042] Based on the examples 1 and 2, in this example, there are three balanced regulating valves 18, including a first balanced regulating valve 6 provided at the liquid application port A, a second balanced regulating valve 8 provided at the liquid application port B, and a third balanced regulating valve 10 provided at the liquid application port C; the first balanced regulating valve 6 is connected to the liquid delivery main pipe 1 through the first liquid delivery branch pipe 2, the second balanced regulating valve 8 is connected to the liquid delivery main pipe 1 through the second liquid delivery branch pipe 3, and the third balanced regulating valve 1 is connected to the liquid delivery main pipe 1 through the third liquid delivery branch pipe 4. The first balanced regulating valve cavity branch pipe 5, the second balanced regulating valve cavity branch pipe 7, and the third balanced regulating valve cavity branch pipe 9 corresponding to the lower ends of the first balanced regulating valve 6, the second balanced regulating valve 8, and the third balanced regulating valve 10 are arranged in parallel, and the first balanced regulating valve cavity branch pipe 5, the second balanced regulating valve cavity branch pipe 7, and the third balanced regulating valve cavity branch pipe 9 are in closed communication.

[0043] There is a height difference between the liquid inlet 15 at A, B and C. The first balancing regulating valve 6 at A is installed at a height H1 from the main pipe, the second balancing regulating valve 8 at B is installed at a height H2 from the main pipe, and the third balancing regulating valve 10 at C is installed at a height H3 from the main pipe, H1>H2>H3;

[0044] The three locations A, B, and C should use the same parameter balancing regulating valves 18; the valve cores 12 of the first balancing regulating valve 6, the second balancing regulating valve 8, and the third balancing regulating valve 10 should be installed in the same direction and at the same horizontal angle;

[0045] Self-adjustment function implementation process:

[0046] The pressure difference between the two sides of the regulating valve core 12

[0047] After the liquid flows into the main pipe 1 and enters each branch, it enters the liquid thrust chamber 14 of the first balancing regulating valve 6, the second balancing regulating valve 8 and the third balancing regulating valve 10, and flows through the respective liquid outlets 13 to reach the liquid inflow application points at A, B and C. Because there is a height difference between the corresponding heights H1, H2 and H3 of the first liquid delivery branch pipe 2, the second liquid delivery branch pipe 3 and the third liquid delivery branch pipe 4, the liquid density is relatively large, and the static pressure generated by the liquid height at A, B and C at different heights is affected differently. The pressure of the liquid thrust chamber 14 of the first balancing regulating valve 6, the second balancing regulating valve 8 and the third balancing regulating valve 10 is reduced successively, and the gas thrust chamber 17 is connected by a closed gas, and the gas pressure in the chamber is equal.

[0048] The valve core 12 moves toward the side with lower pressure. At this time, the balanced regulating valves 18 at A, B, and C move toward the side with lower force due to the pressure of their respective liquid thrust chambers 14 and gas thrust chambers 17, changing the volume and pressure of the closed gas connecting space. At the same time, the movement of the valve core 12 causes the liquid flow cross-section of the liquid thrust chamber 14 and the liquid outlet 13 of the balanced regulating valve 18 to change, thereby adjusting the pressure of the liquid thrust chamber 14.

[0049] The balance between the closed gas pressure and the liquid thrust chamber is achieved after several reciprocating cycles during the adaptive automatic adjustment process in which there is a difference between the gas pressure in the closed gas thrust chamber 17 and the pressure in the liquid thrust chamber 14. The volume of the gas connecting space is stable and the pressure is equal, and the valve core 12 is also stabilized in a fixed position, and the pressure of the liquid thrust chamber 14 of the balance regulating valve 18 is also equal.

[0050] When the pressure of the liquid delivery main pipe 1 changes, the system will re-balance and adjust. If the pressure of the total pipeline system changes, the system will automatically adjust to the new cross-sectional size of the fluid outlet 13 to achieve isobaric regulation.

[0051] The present invention utilizes the lightness and slight compressibility of gas, and combines the relationship between flow pressure difference and flow cross-section. The balancing control valve 18 provided by the present invention can realize adaptive adjustment without electrical automation. The balancing control valve 18 and the adjustment system provided by the present invention can realize adaptive adjustment, thereby reducing costs.

[0052] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design that is the same or similar to the present invention belongs to the protection scope of the present invention. The device structures and method steps not described in detail in this embodiment are all well-known technologies and commonly used methods in the industry and will not be described one by one here.

Claims

1. A method for isobaric adjustment with height difference, characterized in that: An isobaric adjustment system with a height difference is adopted, the system at least comprising a plurality of balancing control valves (18) and a liquid delivery main pipe (1) arranged at different heights, the liquid inlet (15) at the lower end of each balancing control valve (18) being connected to a liquid delivery branch pipe, the liquid delivery branch pipe being in communication with the liquid delivery main pipe (1); the gas inlet (16) at the lower end of each balancing control valve (18) being provided with a balancing control valve cavity external branch pipe in communication with each other; the balancing control valve (18) at least comprising a valve body (11) and a valve core (12), the valve core (12) being located in the valve body (11) and being in communication with the valve body (11) sliding connection; the lower end of the valve body (11) is provided with a liquid inlet (15) and a gas inlet (16); the upper end of the valve body (11) is provided with a liquid outlet (13); the valve core (12) separates the valve body (11) into a liquid thrust chamber (14) and a gas thrust chamber (17); the gas inlet (16) is provided on the valve body (11) at the lower end of the gas thrust chamber (17), and the liquid inlet (15) is provided on the valve body (11) at the lower end of the liquid thrust chamber (14); the valve core (12) is composed of five cylinders of different sizes; the five cylinders are connected to each other by a plurality of channels; the valve core (12) is connected to the valve body (11) ... The cylinders are, from left to right, a first cylinder (1201), a second cylinder (1202), a third cylinder (1203), a fourth cylinder (1204) and a fifth cylinder (1205); the diameters of the second cylinder (1202) and the fourth cylinder (1204) are the same, and are the same as the inner diameter of the valve body (11); the diameter of the third cylinder (1203) is smaller than the diameter of the second cylinder (1202); the diameters of the first cylinder (1201) and the fifth cylinder (1205) are smaller than the diameter of the third cylinder (1203); The upper right end face of the second cylinder (1202) is located at the liquid outlet (13), the upper left end face of the second cylinder (1202) is sealingly and slidably connected to the inner wall of the upper end of the valve body (11), and the lower end face of the second cylinder (1202) is located at the liquid inlet (15); the annular space between the third cylinder (1203) and the valve body (11) connects the liquid inlet (15) and the liquid outlet (13); the liquid inlet (15) is connected to the liquid thrust chamber (14); the upper and lower ends of the fourth cylinder (1204) are both slidingly and sealingly connected to the inner wall of the valve body (11); The specific steps of the equal pressure adjustment method with height difference are as follows: Step 1: Install the balancing regulating valve (18) at multiple required positions at different heights, then connect the liquid delivery branch pipe corresponding to the lower end of the balancing regulating valve (18) to the liquid delivery main pipe (1), and then connect the balancing regulating valve cavity outer branch pipes corresponding to the lower end of the balancing regulating valve (18) to each other; liquid flows into the balancing regulating valve (18) through the liquid inlet (15) of the liquid delivery main pipe (1), a part of the liquid enters the liquid thrust chamber (14), and the other part flows out from the liquid outlet (13) through the annulus between the third cylinder (1203) and the valve body (11); the sealed balancing regulating valve cavity outer branch pipe is connected to the gas inlet (16), enters the gas thrust chamber (17), and forms a thrust on the valve core (12); Step 2: The balancing regulating valve (18) is moved to the side with less force due to the pressure of the respective liquid thrust chamber (14) and gas thrust chamber (17), thereby changing the volume and pressure of the closed gas communication space. At the same time, the movement of the valve core (12) causes the flow cross-section of the liquid thrust chamber (14) and the liquid outlet (13) of the balancing regulating valve (18) to change, thereby adjusting the pressure of the liquid thrust chamber (14); Step 3: When there is a difference between the gas pressure in the sealed gas thrust chamber (17) and the liquid pressure in the liquid thrust chamber (14), the adjustment in step 2 is performed multiple times to achieve a balance, the volume of the gas connection space is stabilized and the pressure is equal, the valve core (12) is stabilized in a fixed position, and the pressure of the liquid thrust chamber (14) of the balance regulating valve (18) is equal.

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