Bidirectional constant pressure difference valve

Abstract

The utility model relates to the technical field of differential pressure valves, in particular to a bidirectional constant differential pressure valve which comprises a constant differential pressure valve body, a main liquid inlet pipe and a main liquid outlet pipe are arranged on the outer wall of the constant differential pressure valve body, a first liquid guide pipe is arranged at the input end of the main liquid inlet pipe, and a first pipeline butt joint pipe is arranged at the input end of the first liquid guide pipe. The main liquid outlet pipe is communicated with the first pipeline butt joint pipe through a U-shaped auxiliary liquid outlet pipe, a second liquid guide pipe is arranged at the output end of the main liquid outlet pipe, a second pipeline butt joint pipe is arranged at the output end of the second liquid guide pipe, and the second pipeline butt joint pipe is communicated with the main liquid inlet pipe through a U-shaped auxiliary liquid inlet pipe. The two-way constant pressure difference valve can effectively work in different flowing directions, forward flowing and reverse flowing of fluid are achieved by controlling opening and closing of the electromagnetic valve, and therefore it is ensured that a system can still maintain stable pressure difference when the fluid flows in two directions, the flexibility and adaptability of the system are remarkably improved through the design, and the service life of the system is prolonged. The device is especially suitable for application occasions where the fluid flowing direction needs to be frequently changed.

Description

Technical Field

[0001] The utility model relates to the technical field of differential pressure valves, in particular to a bidirectional constant differential pressure valve. Background Art

[0002] A constant pressure differential valve is a device used in fluid control systems. Its main function is to maintain a constant pressure differential in the system, thereby ensuring the stability and efficiency of the system operation. It is usually used in heating, air conditioning and industrial fluid delivery systems to control the flow of the fluid by adjusting the position of the valve core so that the pressure difference between the inlet and outlet is maintained within a preset range. Under unidirectional flow conditions, the constant pressure differential valve can effectively reduce the pressure differential fluctuation in the system and improve the system's operating efficiency and stability.

[0003] However, the traditional constant pressure differential valve has some limitations, which are particularly obvious under bidirectional flow conditions. That is, the traditional constant pressure differential valve only has a one-way constant pressure function. The existing constant pressure differential valve can usually only work in a single flow direction, that is, it can only effectively adjust the pressure difference when the fluid flows from the high-pressure end to the low-pressure end. When the flow direction changes, such as the fluid in the original fluid output pipe needs to flow toward the original fluid input pipe, the existing constant pressure differential valve will block the reverse flow of the fluid, cannot work effectively, and cannot maintain the system's pressure difference constant.

[0004] Therefore, the existing constant pressure differential valve is unable to cope with the application requirements under bidirectional flow conditions. In order to solve this problem, the present invention proposes a bidirectional constant pressure differential valve, which can work effectively under different flow directions and maintain a constant pressure difference of the system, thereby improving the stability and operation efficiency of the system. Utility Model Content

[0005] The utility model aims to provide a bidirectional constant pressure differential valve to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A bidirectional constant pressure differential valve comprises a constant pressure differential valve body, a core component of the constant pressure differential valve, a valve core and other key components for adjusting the fluid pressure differential, which is the main structure of the entire device, and is a prior art, and does not involve improvements to the internal structure of the constant pressure differential valve body, and will not be described in detail herein. A main liquid inlet pipe is provided on the left side of the outer wall of the constant pressure differential valve body, which is used to input fluid from the outside into the constant pressure differential valve body, a first liquid guide pipe is provided at the input end of the main liquid inlet pipe, a first solenoid valve is provided on the first liquid guide pipe, which is used to control the switch of the first liquid guide pipe, and a first pipeline docking pipe is provided at the input end of the first liquid guide pipe, and the main liquid inlet pipe and the first pipeline docking pipe are connected through the first liquid guide pipe, so that external fluid can enter the constant pressure differential valve body;

[0008] A main liquid outlet pipe is provided on the right side of the outer wall of the constant pressure differential valve body, which is used to output the regulated fluid from the constant pressure differential valve body to the external system. The main liquid outlet pipe is connected to the first pipeline docking pipe through a U-shaped auxiliary liquid outlet pipe, which is used to guide the fluid from the main liquid outlet pipe to the first pipeline docking pipe under certain circumstances to achieve reverse flow of the fluid. A fourth solenoid valve is provided on the U-shaped auxiliary liquid outlet pipe, which is used to control the switch of the U-shaped auxiliary liquid outlet pipe. A second liquid guide pipe is provided on the output end of the main liquid outlet pipe, and a second solenoid valve is provided on the second liquid guide pipe, which is used to control the switch of the second liquid guide pipe. The first solenoid valve and the second solenoid valve are opened synchronously, and the third solenoid valve and the fourth solenoid valve are opened synchronously. The solenoid valves are closed synchronously to realize the forward circulation of the fluid. The output end of the second liquid guide tube is provided with a second pipeline docking tube, and the second pipeline docking tube is connected with the main liquid inlet tube through a U-shaped auxiliary liquid inlet tube, and is used to guide the fluid from the second pipeline docking tube to the main liquid inlet tube under specific circumstances to realize the reverse flow of the fluid. The U-shaped auxiliary liquid inlet tube is provided with a third solenoid valve for controlling the switch of the U-shaped auxiliary liquid inlet tube. The reverse flow of the fluid of the constant pressure difference valve is realized through the cooperation of the U-shaped auxiliary liquid outlet tube and the U-shaped auxiliary liquid inlet tube. The third solenoid valve and the fourth solenoid valve are opened synchronously, and the first solenoid valve and the second solenoid valve are closed synchronously, so as to realize the reverse circulation of the fluid.

[0009] Preferably, a first liquid inlet connecting end is provided on the rear side of the outer wall of the main liquid inlet pipe, and a third liquid outlet connecting end is provided at the output end of the U-shaped auxiliary liquid inlet pipe. The third liquid outlet connecting end is detachably connected to the first liquid inlet connecting end by bolts, so as to facilitate the disassembly and assembly of the U-shaped auxiliary liquid inlet pipe and the main liquid inlet pipe.

[0010] Preferably, a second liquid outlet connection end is provided on the rear side of the outer wall of the second pipeline butt joint tube, and a third liquid inlet connection end is provided at the input end of the U-shaped auxiliary liquid inlet pipe. The third liquid inlet connection end is detachably connected to the second liquid outlet connection end by bolts, thereby facilitating the disassembly and assembly of the U-shaped auxiliary liquid inlet pipe and the second pipeline butt joint tube.

[0011] Preferably, a second liquid inlet connection end is provided on the front side of the outer wall of the first pipeline docking tube, and a fourth liquid outlet connection end is provided at the output end of the U-shaped auxiliary liquid outlet pipe. The fourth liquid outlet connection end is detachably connected to the second liquid inlet connection end by bolts, so as to facilitate the disassembly and assembly of the U-shaped auxiliary liquid outlet pipe and the first pipeline docking tube.

[0012] Preferably, a first liquid outlet connection end is provided on the front side of the outer wall of the main liquid outlet pipe, and a fourth liquid inlet connection end is provided at the input end of the U-shaped auxiliary liquid outlet pipe. The fourth liquid inlet connection end is detachably connected to the first liquid outlet connection end by bolts, so as to facilitate the disassembly and assembly of the U-shaped auxiliary liquid outlet pipe and the main liquid outlet pipe.

[0013] Preferably, a first flange is provided at the left end of the outer wall of the first pipe-butt tube, and the input end flange of the first pipe-butt tube is connected to the fluid input pipe, so as to facilitate the disassembly and assembly of the first pipe-butt tube and the fluid input pipe.

[0014] Preferably, a second flange is provided at the right end of the outer wall of the second pipe-butt tube, and the output end flange of the second pipe-butt tube is connected to the fluid output pipe, so as to facilitate the disassembly and assembly of the second pipe-butt tube and the fluid output pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The bidirectional constant pressure differential valve can work effectively in different flow directions. By controlling the switch of the solenoid valve, the forward and reverse flow of the fluid can be realized, thereby ensuring that the system can still maintain a stable pressure difference when the fluid flows in both directions. This design significantly improves the flexibility and adaptability of the system, and is particularly suitable for applications where the direction of fluid flow needs to be changed frequently.

[0017] 2. The bidirectional constant pressure differential valve realizes the regulation of fluid under bidirectional flow through the design of U-shaped auxiliary liquid inlet pipe and U-shaped auxiliary liquid outlet pipe. Each connection end is connected by bolts, which is convenient for disassembly and maintenance of related pipelines, reduces the difficulty of equipment installation and maintenance, and improves the convenience of system operation.

[0018] 3. The synchronous control design of the bidirectional constant pressure differential valve and the solenoid valve ensures that the fluid can stably pass through the valve in both forward and reverse flows, avoiding valve failure or system pressure differential fluctuations caused by changes in fluid direction, and improving the reliability and operational stability of the system.

[0019] 4. The bidirectional constant pressure differential valve realizes bidirectional fluid control through an innovative U-shaped pipe design without the need for a complicated pipe layout, thereby saving the installation space of the system and making the utility model more applicable in complex or space-constrained fluid control systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall first-view structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0022] Figure 3 It is a partial structural schematic diagram of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the U-shaped auxiliary liquid inlet pipe in the utility model;

[0024] Figure 5This is a schematic diagram of the structure of the U-shaped auxiliary liquid outlet pipe in the utility model;

[0025] In the figure: 1. constant pressure differential valve body; 2. main liquid inlet pipe; 20. first liquid inlet connection end; 3. main liquid outlet pipe; 30. first liquid outlet connection end; 4. first liquid guide pipe; 40. first solenoid valve; 5. first pipeline docking pipe; 50. second liquid inlet connection end; 6. second liquid guide pipe; 60. second solenoid valve; 7. second pipeline docking pipe; 70. second liquid outlet connection end; 8. U-shaped auxiliary liquid inlet pipe; 80. third liquid inlet connection end; 81. third liquid outlet connection end; 82. third solenoid valve; 9. U-shaped auxiliary liquid outlet pipe; 90. fourth liquid inlet connection end; 91. fourth liquid outlet connection end; 92. fourth solenoid valve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0029] A bidirectional constant pressure differential valve comprises a constant pressure differential valve body 1, a core component of the constant pressure differential valve, which contains a valve core and other key components for adjusting the fluid pressure differential, and is the main structure of the entire device. It is a prior art and does not involve improvements to the internal structure of the constant pressure differential valve body 1. It will not be described in detail here. A main liquid inlet pipe 2 is provided on the left side of the outer wall of the constant pressure differential valve body 1, which is used to input the fluid from the outside into the constant pressure differential valve body 1. A first liquid guide pipe 4 is provided at the input end of the main liquid inlet pipe 2. A first solenoid valve 40 is provided on the first liquid guide pipe 4, which is used to control the switch of the first liquid guide pipe 4. A first pipeline docking pipe 5 is provided at the input end of the first liquid guide pipe 4. The main liquid inlet pipe 2 and the first pipeline docking pipe 5 are connected through the first liquid guide pipe 4, so that the external fluid can enter the constant pressure differential valve body 1;

[0030] A main liquid outlet pipe 3 is provided on the right side of the outer wall of the constant pressure differential valve body 1, which is used to output the regulated fluid from the constant pressure differential valve body 1 to the external system. The main liquid outlet pipe 3 is connected to the first pipeline docking pipe 5 through the U-shaped auxiliary liquid outlet pipe 9, which is used to guide the fluid from the main liquid outlet pipe 3 to the first pipeline docking pipe 5 under specific circumstances to achieve reverse flow of the fluid. The U-shaped auxiliary liquid outlet pipe 9 is provided with a fourth solenoid valve 92, which is used to control the switch of the U-shaped auxiliary liquid outlet pipe 9. A second liquid guide pipe 6 is provided at the output end of the main liquid outlet pipe 3, and a second solenoid valve 60 is provided on the second liquid guide pipe 6 to control the switch of the second liquid guide pipe 6. The first solenoid valve 40 and the second solenoid valve 60 are opened synchronously, and the third solenoid valve 82 and the fourth solenoid valve 92 are closed synchronously to achieve forward circulation of the fluid. The output end of the second liquid guide pipe 6 is provided with a second pipeline docking Tube 7, the second pipeline docking tube 7 is connected with the main liquid inlet pipe 2 through the U-shaped auxiliary liquid inlet pipe 8, and is used to guide the fluid from the second pipeline docking tube 7 to the main liquid inlet pipe 2 under specific circumstances to achieve reverse flow of the fluid. The U-shaped auxiliary liquid inlet pipe 8 is provided with a third solenoid valve 82, which is used to control the switch of the U-shaped auxiliary liquid inlet pipe 8. The reverse flow of the fluid of the constant pressure difference valve is achieved through the cooperation of the U-shaped auxiliary liquid outlet pipe 9 and the U-shaped auxiliary liquid inlet pipe 8. The third solenoid valve 82 and the fourth solenoid valve 92 are opened synchronously, and the first solenoid valve 40 and the second solenoid valve 60 are closed synchronously, so as to achieve reverse circulation of the fluid. The first solenoid valve 40, the second solenoid valve 60, the third solenoid valve 82 and the fourth solenoid valve 92 are electrically connected to the same controller through wires respectively, and the controller controls the switches of the four solenoid valves according to the needs of the fluid flow direction.

[0031] In this embodiment, a first liquid inlet connection end 20 is provided on the rear side of the outer wall of the main liquid inlet pipe 2, and a third liquid outlet connection end 81 is provided at the output end of the U-shaped auxiliary liquid inlet pipe 8. The third liquid outlet connection end 81 is detachably connected to the first liquid inlet connection end 20 by bolts, so as to facilitate the disassembly and assembly of the U-shaped auxiliary liquid inlet pipe 8 and the main liquid inlet pipe 2.

[0032] Specifically, a second liquid outlet connection end 70 is provided on the rear side of the outer wall of the second pipeline docking tube 7, and a third liquid inlet connection end 80 is provided at the input end of the U-shaped auxiliary liquid inlet pipe 8. The third liquid inlet connection end 80 is detachably connected to the second liquid outlet connection end 70 by bolts, so as to facilitate the disassembly and assembly of the U-shaped auxiliary liquid inlet pipe 8 and the second pipeline docking tube 7.

[0033] Furthermore, a second liquid inlet connection end 50 is provided on the front side of the outer wall of the first pipeline docking tube 5, and a fourth liquid outlet connection end 91 is provided at the output end of the U-shaped auxiliary liquid outlet tube 9. The fourth liquid outlet connection end 91 is detachably connected to the second liquid inlet connection end 50 by bolts, so as to facilitate the disassembly and assembly of the U-shaped auxiliary liquid outlet tube 9 and the first pipeline docking tube 5.

[0034] Furthermore, a first liquid outlet connection end 30 is provided on the front side of the outer wall of the main liquid outlet pipe 3, and a fourth liquid inlet connection end 90 is provided at the input end of the U-shaped auxiliary liquid outlet pipe 9. The fourth liquid inlet connection end 90 is detachably connected to the first liquid outlet connection end 30 by bolts, so as to facilitate the disassembly and assembly of the U-shaped auxiliary liquid outlet pipe 9 and the main liquid outlet pipe 3.

[0035] Furthermore, a first flange is provided at the left end of the outer wall of the first pipeline butt joint pipe 5, and the input end flange of the first pipeline butt joint pipe 5 is connected with the fluid input pipe, so as to facilitate the disassembly and assembly of the first pipeline butt joint pipe 5 and the fluid input pipe.

[0036] Furthermore, a second flange is provided at the right end of the outer wall of the second pipe-butting tube 7, and the output end flange of the second pipe-butting tube 7 is connected to the fluid output pipe, which facilitates the disassembly and assembly of the second pipe-butting tube 7 and the fluid output pipe.

[0037] When the bidirectional constant pressure differential valve of this embodiment is in use, when the fluid needs to flow in the forward direction, the first solenoid valve 40 and the second solenoid valve 60 are opened synchronously, the third solenoid valve 82 and the fourth solenoid valve 92 are closed synchronously, and the fluid input pipeline inputs fluid into the first pipeline docking pipe 5, and the fluid flows from the first liquid guide pipe 4 and the main liquid inlet pipe 2 in turn into the constant pressure differential valve body 1, and the fluid after pressure regulation is output from the main liquid outlet pipe 3, and flows from the second liquid guide pipe 6 and the second pipeline docking pipe 7 in turn into the fluid output pipeline; when the fluid needs to flow in the reverse direction, the third solenoid valve 82 and the fourth solenoid valve 92 are opened synchronously, The first solenoid valve 40 and the second solenoid valve 60 are closed synchronously. At this time, the fluid pressure in the fluid output pipeline is greater than the fluid pressure in the fluid input pipeline. The fluid in the fluid output pipeline enters the second pipeline docking pipe 7, and then flows through the U-shaped auxiliary liquid inlet pipe 8 into the main liquid inlet pipe 2, and then enters the constant pressure differential valve body 1. The pressure-regulated fluid is output from the main liquid outlet pipe 3, and then enters the first pipeline docking pipe 5 from the U-shaped auxiliary liquid outlet pipe 9, and finally output from the first pipeline docking pipe 5 to the fluid input pipeline, thereby realizing the reverse flow of the fluid, so that the constant pressure differential valve has the function of two-way constant pressure circulation.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A bidirectional constant pressure differential valve, comprising a constant pressure differential valve body (1), characterized in that: A main liquid inlet pipe (2) is provided on the left side of the outer wall of the constant pressure differential valve body (1), a first liquid guide pipe (4) is provided at the input end of the main liquid inlet pipe (2), a first solenoid valve (40) is provided on the first liquid guide pipe (4), a first pipeline docking pipe (5) is provided at the input end of the first liquid guide pipe (4), a main liquid outlet pipe (3) is provided on the right side of the outer wall of the constant pressure differential valve body (1), the main liquid outlet pipe (3) is connected to the first pipeline docking pipe (5) through a U-shaped auxiliary liquid outlet pipe (9), a fourth solenoid valve (92) is provided on the U-shaped auxiliary liquid outlet pipe (9), a second liquid guide pipe (6) is provided at the output end of the main liquid outlet pipe (3), a second solenoid valve (60) is provided on the second liquid guide pipe (6), a second pipeline docking pipe (7) is provided at the output end of the second liquid guide pipe (6), the second pipeline docking pipe (7) is connected to the main liquid inlet pipe (2) through a U-shaped auxiliary liquid inlet pipe (8), and a third solenoid valve (82) is provided on the U-shaped auxiliary liquid inlet pipe (8).

2. The bidirectional constant pressure differential valve according to claim 1, characterized in that: A first liquid inlet connection end (20) is provided at the rear side of the outer wall of the main liquid inlet pipe (2), and a third liquid outlet connection end (81) is provided at the output end of the U-shaped auxiliary liquid inlet pipe (8), wherein the third liquid outlet connection end (81) is detachably connected to the first liquid inlet connection end (20) via bolts.

3. The bidirectional constant pressure differential valve according to claim 1, characterized in that: A second liquid outlet connection end (70) is provided at the rear side of the outer wall of the second pipe butt joint pipe (7), and a third liquid inlet connection end (80) is provided at the input end of the U-shaped auxiliary liquid inlet pipe (8), wherein the third liquid inlet connection end (80) is detachably connected to the second liquid outlet connection end (70) by means of bolts.

4. The bidirectional constant pressure differential valve according to claim 1, characterized in that: A second liquid inlet connection end (50) is provided on the front side of the outer wall of the first pipeline butt joint pipe (5), and a fourth liquid outlet connection end (91) is provided at the output end of the U-shaped auxiliary liquid outlet pipe (9), and the fourth liquid outlet connection end (91) is detachably connected to the second liquid inlet connection end (50) by means of bolts.

5. The bidirectional constant pressure differential valve according to claim 1, characterized in that: A first liquid outlet connection end (30) is provided on the front side of the outer wall of the main liquid outlet pipe (3), and a fourth liquid inlet connection end (90) is provided at the input end of the U-shaped auxiliary liquid outlet pipe (9), wherein the fourth liquid inlet connection end (90) is detachably connected to the first liquid outlet connection end (30) via bolts.

6. The bidirectional constant pressure differential valve according to claim 1, characterized in that: A first flange is provided at the left end of the outer wall of the first pipeline butt joint pipe (5), and the input end flange of the first pipeline butt joint pipe (5) is connected to a fluid input pipeline.

7. The bidirectional constant pressure differential valve according to claim 1, characterized in that: A second flange is provided at the right end of the outer wall of the second pipeline butt joint pipe (7), and the output end flange of the second pipeline butt joint pipe (7) is connected to a fluid output pipeline.

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