Automatic recirculation valve
By introducing a water pressure detection and motor control system into the automatic recirculation valve, the leakage problem caused by the partial opening of the bypass valve is solved, and the valve is kept tightly sealed under different water pressures to prevent fluid cutting damage.
Patent Information
- Application Number
- CN202422325809.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-09-24
AI Technical Summary
In existing automatic recirculation valves, when the bypass valve is partially open, the fluid cuts through the bypass valve core and the surface of the bypass valve body, leading to leakage and damage.
An automatic recirculation valve was designed, comprising a valve body, a main valve pipe, a bypass valve pipe, and an automatic assist component. The water pressure is detected in real time by a water pressure detection board and a motor control box, and the opening and closing of the bypass valve core is controlled to ensure a tight seal when the water pressure changes.
It effectively prevents damage to the bypass valve core and valve body surface, ensuring that the valve remains tight under different water pressures and avoiding fluid leakage.
Smart Images
Figure CN223648639U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valves, and more particularly to an automatic recirculation valve. Background Technology
[0002] An automatic recirculation valve, also known as a pump protection valve or minimum flow valve, is used for automatic recirculation of centrifugal pumps at minimum flow rates to prevent damage caused by overheating, noise, and vibration under low loads. In related technologies, the automatic recirculation valve includes a main valve and a bypass valve. The main valve includes a main valve body, a guide rod coaxially mounted within the main valve body, and a main valve core that slides along the guide rod. An elastic element is provided between the main valve core and the guide rod to drive the main valve core to reset. The bypass valve includes an eccentric rod, a bypass valve core, and a bypass valve body connected to the main valve body. The eccentric rod is hinged to the end of the bypass valve body near the main valve body, and the eccentric rod is linked to the main valve core. When the main line is working normally, the main valve core slides open along the guide rod, and the eccentric rod follows the movement of the main valve core. The eccentric rod drives the bypass valve core to close the bypass valve, and the fluid passes through the main valve body. When the main line stops working, the pressure on both sides of the main valve core in the main valve body approaches equilibrium. Under the action of the elastic element, the main valve core closes the main valve, and the main valve core drives the eccentric rod to open the bypass valve, and the fluid is discharged through the bypass valve.
[0003] In actual use, it was found that during normal operation, the bypass valve is in a semi-open state. If the bypass valve is opened only slightly, the fluid will pass through the bypass valve core at a high pressure and flow rate. The high-speed fluid will cut the surface of the bypass valve core and the bypass valve body. Over time, grooves will be formed on the surface of the bypass valve core and the bypass valve body, causing the bypass valve to not close tightly when the main line is working normally, and the fluid will leak from the bypass valve.
[0004] Therefore, an automatic recirculation valve is needed to solve this problem. Utility Model Content
[0005] The purpose of this invention is to provide an automatic recirculation valve, which aims to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] An automatic recirculation valve includes a valve body and main valve pipes located on both sides of the valve body. A main valve assembly is provided inside the main valve pipe. A bypass valve pipe is provided on one side of the valve body. A bypass valve assembly is provided inside the bypass valve pipe. An automatic assist assembly is fitted into the bypass valve assembly. The automatic assist assembly is installed in a control box.
[0008] Preferably, the valve body is provided with a valve port, the main valve pipe is provided with a main valve sealing element, a main valve leakage port is provided on one side of the main valve sealing element, the main valve leakage port is connected to the valve port, and a guide rod is connected to one side of the main valve sealing element.
[0009] Preferably, the main valve assembly includes an elastic tube, one end of which is connected to the main valve sealing element. A spring is provided inside the elastic tube, the spring is connected to a spring shaft, the spring shaft is connected to a fixing plate, and the fixing plate is installed on the inner wall of the main valve tube.
[0010] Preferably, the guide rod is provided with a guide hole, one end of the eccentric rod is fitted with the guide hole, the other end of the eccentric rod is fitted with an eccentric block, a displacement rod is provided above the eccentric block, the eccentric rod is provided with a limiting hole, the eccentric block is fitted with a limiting rod, and the limiting hole is fitted with the limiting rod.
[0011] Preferably, the bypass valve assembly includes a bypass valve core, the bypass valve core having a valve core port, an opening / closing pipe having an opening / closing pipe having a displacement port, and the displacement port fitting a displacement rod.
[0012] Preferably, one end of the bypass valve core is fitted onto the limiting rod, and the other end is connected to the bypass valve sealing component. The bypass valve sealing component has several water passage holes on one side, and the water passage holes are connected to the valve core port.
[0013] Preferably, the automatic assist component includes a through plate, an eccentric rod fitted into the through plate, a detection shaft connected above the through plate, a water pressure detection plate at one end of the detection shaft, a telescopic shaft connected to the other end of the detection shaft, and a telescopic motor connected to the telescopic shaft.
[0014] Preferably, the control box is fitted with a detection shaft, a detection wire is provided on one side of the detection shaft, the detection wire is connected to the motor control box, the motor control box is fixedly connected to the control box, and a support frame is provided below the control box.
[0015] Beneficial effects: When the water flow is low and the water pressure drops, the water pressure is insufficient to support the spring force. The spring rebounds, causing the main valve sealing component to move the guide rod on one side. The guide rod drives the eccentric rod to deflect around the center of the eccentric block, which in turn drives the eccentric block to rotate. The eccentric block drives the displacement rod on one side to rotate and act on the displacement port, causing the locking tube to slide on the bypass valve core and expose the valve core port. This allows water to enter the valve core port and flow into the bypass valve pipe through the water passage, thus achieving the function of closing the main valve pipe and opening the bypass valve pipe. The water pressure detection plate below the detection shaft of this new type can detect the water pressure in real time. When the water pressure causes the opening and closing pipe to be partially closed... When the valve core is open, the bypass valve pipe is in a semi-open state. The detection shaft sends the critical water pressure signal to the motor control box through the detection wire. The motor control box starts the telescopic motor to drive the telescopic shaft to move. The telescopic shaft drives the detection shaft to move, which in turn drives the through plate to act on one end of the eccentric rod, so that the bypass valve core is fully opened or fully closed. When the water pressure reaches outside the preset critical range, the motor control box shuts off the telescopic motor, so that the circulation valve is back in the water pressure control state, waiting for the next trigger. This solves the problem that the bypass valve opening is small, and the fluid will cut the surface of the bypass valve core and bypass valve body, damaging the bypass valve. Attached Figure Description
[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a diagram of the internal structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the valve body structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the main valve assembly structure of this utility model;
[0021] Figure 5 This is a schematic diagram of the bypass valve assembly of this utility model;
[0022] Figure 6 This is a schematic diagram of the automatic assist component structure of this utility model.
[0023] Legend:
[0024] 1. Valve body; 2. Main valve pipe; 3. Main valve assembly; 4. Bypass valve pipe; 5. Bypass valve assembly; 6. Automatic assist assembly; 7. Control box; 11. Valve port; 21. Main valve sealing element; 22. Main valve leakage port; 23. Guide rod; 31. Elastic tube; 32. Spring; 33. Spring shaft; 34. Fixing plate; 231. Guide hole; 41. Eccentric rod; 42. Eccentric block; 43. Displacement rod; 411. Limit hole; 44. Limit rod; 51. Bypass valve core; 52. Valve core port; 53. Opening and closing pipe; 531. Displacement port; 54. Bypass valve sealing element; 55. Water passage hole; 61. Through plate; 62. Detection shaft; 621. Telescopic shaft; 63. Water pressure detection plate; 64. Telescopic motor; 71. Detection wire; 72. Motor control box; 73. Support frame. Detailed Implementation
[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the utility model without creative effort are within the scope of protection of the utility model.
[0026] It should be noted that if the utility model embodiment involves directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0027] Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to use them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the utility model.
[0028] Please refer to the instruction manual appendix. Figures 1-6 An automatic recirculation valve includes a valve body 1 and main valve pipes 2 located on both sides of the valve body 1. A main valve assembly 3 is provided inside the main valve pipe 2. A bypass valve pipe 4 is provided on one side of the valve body 1. A bypass valve assembly 5 is provided inside the bypass valve pipe 4. An automatic assist assembly 6 is fitted into the bypass valve assembly 5. The automatic assist assembly 6 is installed in a control box 7.
[0029] Furthermore, the valve body 1 is provided with a valve port 11, the main valve pipe 2 is provided with a main valve sealing element 21, a main valve leakage port 22 is provided on one side of the main valve sealing element 21, the main valve leakage port 22 is connected to the valve port 11, and a guide rod 23 is connected to one side of the main valve sealing element 21.
[0030] Furthermore, the main valve assembly 3 includes an elastic tube 31, one end of which is connected to the main valve sealing element 21. A spring 32 is provided inside the elastic tube 31, and the spring 32 is connected to a spring shaft 33. The spring shaft 33 is connected to a fixing plate 34, and the fixing plate 34 is installed on the inner wall of the main valve pipe 2. During normal water flow, the water enters the valve port 11 through the main valve pipe 2 on one side of the valve body 1 and reaches the main valve leakage port 22 on the other side. The water pressure impacts the main valve sealing element 21, thereby compressing the spring 32 to open the main valve sealing element 21 and allow water to flow into the main valve pipe 2 to complete the opening of the main valve.
[0031] Furthermore, the guide rod 23 is provided with a guide hole 231, one end of the eccentric rod 41 is fitted into the guide hole 231, the other end of the eccentric rod 41 is fitted into an eccentric block 42, a displacement rod 43 is provided above the eccentric block 42, the eccentric rod 41 is provided with a limiting hole 411, the eccentric block 42 is fitted into a limiting rod 44, and the limiting hole 411 is fitted into the limiting rod 44.
[0032] Furthermore, the bypass valve assembly 5 includes a bypass valve core 51, the bypass valve core 51 is provided with a valve core port 52, an opening and closing pipe 53 is provided on the outside of the valve core port 52, the opening and closing pipe 53 is provided with a displacement port 531, and the displacement port 531 is fitted with a displacement rod 43.
[0033] Furthermore, one end of the bypass valve core 51 is fitted onto the limiting rod 44, and the other end is connected to the bypass valve sealing element 54. The bypass valve sealing element 54 has several water passage holes 55 on one side, which connect to the valve core port 52. When the water flow is low, causing a drop in water pressure, the water pressure is insufficient to support the elastic force of the spring 32. Under the support of the spring shaft 33, the spring 32 rebounds, causing the main valve sealing element 21 to move towards the main valve leak port 22, thereby driving the guide rod on one side. 23 Displacement: Guide rod 23 drives eccentric rod 41 to deflect around the center of eccentric block 42 through guide hole 231, thereby causing eccentric block 42 to rotate. Eccentric block 42 drives displacement rod 43 on one side to rotate and act on displacement port 531, causing locking pipe 53 to slide on bypass valve core 51 and expose valve core port 52, thereby allowing water to enter valve core port 52 and flow into bypass valve pipe 4 from water passage hole 55, thus realizing the function of closing main valve pipe 2 and opening bypass valve pipe 4.
[0034] Furthermore, the automatic assist component 6 includes a through plate 61, which is fitted with an eccentric rod 41. A detection shaft 62 is connected above the through plate 61. A water pressure detection plate 63 is provided at one end of the detection shaft 62, and a telescopic shaft 621 is connected to the other end of the detection shaft 62. The telescopic shaft 621 is connected to a telescopic motor 64.
[0035] Furthermore, the control box 7 is fitted with the detection shaft 62, and a detection wire 71 is provided on one side of the detection shaft 62. The detection wire 71 is connected to the motor control box 72, and the motor control box 72 is fixedly connected to the control box 7. A support frame 73 is provided below the control box 7. The water pressure detection plate 63 below the detection shaft 62 can detect the water pressure in real time. When the water pressure causes the opening and closing pipe 53 to partially cover the valve core port 52, the bypass valve pipe is in a semi-open state. The detection shaft 62 sends the critical water pressure signal to the motor control box 72 through the detection wire 71. The motor control box 72 starts the telescopic motor 64 to drive the telescopic shaft 621 to move. The telescopic shaft 621 drives the detection shaft 62 to move, which in turn drives the through plate 61 to act on one end of the eccentric rod 41, so that the bypass valve core 51 is fully opened or fully closed. When the water pressure reaches outside the preset critical range, the motor control box 72 shuts off the telescopic motor 64, so that the circulation valve is back in the water pressure control state.
[0036] During normal water flow, water enters through the main valve pipe 2 on one side of the valve body 1, flowing into the valve port 11 and reaching the main valve drain port 22 on the other side. Water pressure impacts the main valve sealing element 21, compressing the spring 32 and opening it to allow water to flow into the main valve pipe 2, thus opening the main valve. When the water flow is low, causing a drop in water pressure, the pressure is insufficient to support the spring force of the spring 32. Supported by the spring shaft 33, the spring 32 rebounds, causing the main valve sealing element 21 to shift towards the main valve drain port 22. This shifts the guide rod 23 on one side, which, through the guide hole 231, drives the eccentric rod 41 to deflect around the center of the eccentric block 42. This causes the eccentric block 42 to rotate, which in turn drives the displacement rod 43 on one side to rotate and act on the displacement port 531. This causes the locking pipe 53 to slide on the bypass valve core 51 and expose the valve core port 52, allowing water to enter the valve core port 52 and flow into the bypass valve pipe 4 through the water passage 55. This allows the main valve pipe 2 to be closed while the bypass valve pipe 4 is open. During water flow, the water pressure detection plate 63 below the detection shaft 62 can detect the water pressure in real time. When the water pressure causes the opening and closing pipe 53 to partially cover the valve core port 52, the bypass valve pipe is in a semi-open state. The detection shaft 62 sends the critical water pressure signal to the motor control box 72 through the detection wire 71. The motor control box 72 starts the telescopic motor 64 to drive the telescopic shaft 621 to move. The telescopic shaft 621 drives the detection shaft 62 to move, which in turn drives the through plate 61 to act on one end of the eccentric rod 41, causing the bypass valve core 51 to be fully opened or fully closed. When the water pressure reaches outside the preset critical range, the motor control box 72 shuts off the telescopic motor 64, so that the circulation valve is back in the water pressure control state, waiting for the next trigger. This solves the problem that the bypass valve opening is small, and the fluid will cut the surface of the bypass valve core and bypass valve body, damaging the bypass valve.
[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An automatic recirculation valve, comprising a valve body (1) and main valve pipes (2) disposed on both sides of the valve body (1), characterized in that, The main valve pipe (2) is provided with a main valve assembly (3), and a bypass valve pipe (4) is provided on one side of the valve body (1). A bypass valve assembly (5) is provided in the bypass valve pipe (4). The bypass valve assembly (5) is fitted with an automatic assist assembly (6). The automatic assist assembly (6) is installed in the control box (7).
2. The automatic recirculation valve according to claim 1, characterized in that, The valve body (1) is provided with a valve port (11), the main valve pipe (2) is provided with a main valve sealing element (21), the main valve sealing element (21) is provided with a main valve leak port (22) on one side, the main valve leak port (22) is connected to the valve port (11), and the main valve sealing element (21) is connected to a guide rod (23) on one side.
3. The automatic recirculation valve according to claim 1, characterized in that, The main valve assembly (3) includes an elastic tube (31), one end of which is connected to the main valve sealing element (21). A spring (32) is provided inside the elastic tube (31), the spring (32) is connected to a spring shaft (33), the spring shaft (33) is connected to a fixing plate (34), and the fixing plate (34) is installed on the inner wall of the main valve tube (2).
4. The automatic recirculation valve according to claim 2, characterized in that, The guide rod (23) is provided with a guide hole (231), one end of the guide hole (231) is fitted with an eccentric rod (41), the other end of the eccentric rod (41) is fitted with an eccentric block (42), a displacement rod (43) is provided above the eccentric block (42), the eccentric rod (41) is provided with a limiting hole (411), the eccentric block (42) is fitted with a limiting rod (44), and the limiting hole (411) is fitted with the limiting rod (44).
5. The automatic recirculation valve according to claim 1, characterized in that, The bypass valve assembly (5) includes a bypass valve core (51), the bypass valve core (51) is provided with a valve core port (52), an opening and closing pipe (53) is provided on the outside of the valve core port (52), the opening and closing pipe (53) is provided with a displacement port (531), and the displacement port (531) is fitted with a displacement rod (43).
6. The automatic recirculation valve according to claim 5, characterized in that, One end of the bypass valve core (51) is fitted onto the limiting rod (44), and the other end is connected to the bypass valve sealing component (54). The bypass valve sealing component (54) has several water passage holes (55) on one side, and the water passage holes (55) are connected to the valve core port (52).
7. The automatic recirculation valve according to claim 1, characterized in that, The automatic assist component (6) includes a through plate (61) fitted with an eccentric rod (41), a detection shaft (62) connected above the through plate (61), a water pressure detection plate (63) provided at one end of the detection shaft (62), and a telescopic shaft (621) connected to the other end of the detection shaft (62), which is connected to a telescopic motor (64).
8. The automatic recirculation valve according to claim 1, characterized in that, The control box (7) is fitted with the detection shaft (62). A detection wire (71) is provided on one side of the detection shaft (62). The detection wire (71) is connected to the motor control box (72). The motor control box (72) is fixedly connected to the control box (7). A support frame (73) is provided below the control box (7).