Double-valve sealed hydraulic control valve

Abstract

The utility model relates to the technical field of hydraulic control valves, and discloses a bivalve sealed hydraulic control valve which comprises a control valve, a valve inlet end, a main valve base and a valve outlet end, the valve inlet end is arranged on one side of the control valve, the valve outlet end is arranged on the other side of the control valve, and the valve outlet end comprises a second guide pipe. A ball valve is arranged in the lower portion of the second guide pipe, a check valve is arranged in the middle of the second guide pipe, a first flow dividing pipe is fixedly connected to the outer wall of the check valve, an electromagnetic valve is arranged above the second guide pipe, the integrated pipe is fixedly connected to the interior of the main valve base, and the needle valve is turned down clockwise through cooperation between the needle valve and a travel switch; the closing time of the main valve element can be prolonged, the slow closing effect is achieved, the water hammer phenomenon is reduced, the closing time of the main valve is adjustable within 30-60 S, the travel switch is controlled through the main valve element, and when 90% of the main valve element is closed, a signal is output to a water pump control circuit, and the water pump stops working.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control valves, in particular to a hydraulic control valve with double flap seals. Background Art

[0002] A water pump control valve is a valve for water pressure control. It consists of a main valve and its attached conduit, pilot valve, needle valve, ball valve and pressure gauge. Depending on the purpose, function and location of use, it can be evolved into a remote-controlled float valve, a pressure reducing valve, a slow-closing check valve, a flow control valve, a pressure relief valve, a hydraulic electric control valve, a water pump control valve, etc. This type of valve should generally be installed horizontally in the pipeline. A double-flap sealed hydraulic control valve has two valve discs, usually made of metal or rubber materials, which are used to form a seal with the valve seat. When the valve is closed, the two valve discs will press tightly against the valve seat to prevent the fluid from passing through the valve. When the valve is opened, the fluid pressure will act on the valve disc, overcome the resistance of the spring, and cause the valve disc to leave the valve seat, thereby allowing the fluid to pass through the valve.

[0003] For example, the Chinese patent "CN208153752U" discloses a double-flap sealed hydraulic control valve, which proposes that: when a small amount of terminal users use water when the valve is closed, the small valve flap can open multiple slow-closing flow channels in the valve flap seat to replenish the water supply cavity; when a large number of terminal users use water, the large valve flap opens the valve seat to connect the inlet and outlet cavities for large-scale water replenishment. Therefore, by designing the above-mentioned double-flap structure hydraulic control valve, the pressure of the water outlet cavity can be controlled by the small valve flap at the moment of valve opening and closing, thereby effectively solving the problems of large-caliber hydraulic control valves at the moment of opening and closing, that is, when a small number of terminal users use water, the valve flap is prone to frequent opening and closing, causing the valve to whistle and the valve flap to be easily cavitated.

[0004] It can be seen from the above-mentioned device that although the above-mentioned method is proposed to solve the problem of valve whistling and valve disc cavitation caused by frequent opening and closing, the applicant believes that the following defects still exist:

[0005] The existing double-flap sealed hydraulic control valve cannot control the closing time of the valve core when closing the valve core, resulting in the valve core closing too quickly and causing water hammer, damaging the control valve and reducing its service life. In addition, the valve needs to be closed manually during daily closed use, and the solenoid valve cannot be used to control the upper diaphragm cavity pressure to control the valve closing, resulting in short service life and low efficiency. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a double-flap sealed hydraulic control valve, which has the function of, when the water pump needs to stop working, first closing the main valve 90% by the water pressure at the valve inlet end, and then controlling the water pump to stop running through the travel switch, and the remaining 10% is closed by the return water, and has the advantages of a check function, which can effectively prevent water hammer from occurring and protect the water pump, and solves the problem of the existing double-flap sealed hydraulic control valve, that is, the valve core cannot be closed when closing the closing time, resulting in the valve core closing too quickly to cause water hammer, damage the control valve and reduce its service life, and the valve needs to be closed manually during daily closed use, and the valve closing cannot be controlled by controlling the upper diaphragm cavity pressure through the solenoid valve, resulting in short service life and low efficiency.

[0008] (II) Technical solution

[0009] To achieve the above object, the utility model provides the following technical solution: a double-flap sealed hydraulic control valve, comprising a control valve, a valve inlet, a main valve base, and a valve outlet, wherein one side of the control valve is provided with a valve inlet, and the other side of the control valve is provided with a valve outlet;

[0010] The valve outlet end includes a second conduit, the second conduit is arranged on the outer wall of the valve outlet end, a pressure gauge is arranged on the outer wall of the valve outlet end, a ball valve is arranged inside below the second conduit, a check valve is arranged inside the middle of the second conduit, a first shunt pipe is fixedly connected to the outer wall of the check valve, an electromagnetic valve is arranged above the second conduit, a second shunt pipe is fixedly connected to the outer wall of the electromagnetic valve, the first shunt pipe and the second shunt pipe are fixedly connected to an integrated pipe, and the integrated pipe is fixedly connected to the inside of the main valve base.

[0011] Preferably, the valve inlet end includes an inlet head, which is arranged on the outer wall of the valve inlet end, and a first conduit is fixedly connected to the inside of the inlet head, and a needle valve is fixedly connected to the first conduit, and a check valve is arranged inside the needle valve, and the needle valve is fixedly connected to the inside of the main valve base.

[0012] Preferably, the main valve base includes a valve head, a valve stem is fixedly connected below the valve head, the valve head is arranged on the upper surface of the main valve base, a connecting rod base is fixedly installed on the outer wall of the valve head, a connecting rod is fixedly connected to the outer wall of the connecting rod base, a rotating rod is movably installed on the outer wall of the connecting rod, a rocker is fixedly connected to the outer wall of the rotating rod, and the rocker is fixedly connected to a travel switch.

[0013] Preferably, the travel switch is fixedly mounted on the outer wall of the travel switch base, the travel switch base is arranged on the outer wall of the valve stem, the outer wall of the valve stem is provided with a fixing nut, and the fixing nut fixes the travel switch base and the top of the main valve base.

[0014] Preferably, the main valve base is sealed and installed with the control valve through a flange, a valve core diaphragm is arranged between the two flanges, the valve core diaphragm is arranged inside the upper valve core, the upper valve core is fixedly installed on the outer wall of the valve stem, a valve core is fixedly installed below the upper valve core, and a lower valve core is fixedly connected below the valve core.

[0015] Preferably, a partition is provided inside the control valve, the partition is provided with a water hole, and limit plate bases are fixedly installed on the outer walls on both sides of the water hole, the outer walls of the limit plate bases on both sides are fixedly connected to the limit plates, and a valve stem is movably installed inside the limit plate.

[0016] Preferably, the lower valve core is opened when the solenoid valve is opened, and after the solenoid valve is closed, the lower valve core is closed by 90%.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a double-flap sealed hydraulic control valve, which has the following beneficial effects:

[0019] 1. The double-flap sealed hydraulic control valve, through the cooperation between the needle valve and the travel switch, close the small needle valve clockwise, which can prolong the closing time of the main valve core, play a slow closing effect, and reduce the water hammer phenomenon. The closing time of the main valve is adjustable within 30S-60S. The travel switch is controlled by the main valve core. When the main valve core is closed by 90%, the output signal is sent to the water pump control circuit, and the water pump stops working.

[0020] 2. The double-flap sealed hydraulic control valve achieves the control of the closing of the solenoid valve through the cooperation between the solenoid valve and the valve core diaphragm. The pressure difference generated by the upper medium on the valve core diaphragm and the upper valve core controls the closing of the entire valve core, making it convenient to control the switch of the control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall front view structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall back structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the control valve of the utility model.

[0025] The numbers in the figure are:

[0026] 1. Control valve; 11. Partition; 12. Limit plate base; 13. Limit plate; 2. Valve inlet end; 21. Water inlet head; 22. First conduit; 23. Needle valve; 3. Main valve base; 31. Valve head; 32. Connecting rod base; 33. Connecting rod; 34. Rotating rod; 35. Rocker; 36. Travel switch; 37. Travel switch base; 38. Fixing nut; 39. Valve stem; 310. Upper valve core; 311. Valve core diaphragm; 312. Valve core; 313. Lower valve core; 4. Valve outlet end; 41. Second conduit; 42. Ball valve; 43. Check valve; 44. First shunt pipe; 45. Solenoid valve; 46. Second shunt pipe; 47. Integrated pipe; 48. Pressure gauge. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1 A double-flap sealed hydraulic control valve comprises a control valve 1, a valve inlet end 2, a main valve base 3, and a valve outlet end 4. The control valve 1 is provided with a valve inlet end 2 on one side, and a valve outlet end 4 is provided on the other side of the control valve 1. The valve inlet end 2 comprises an inlet head 21, which is arranged on the outer wall of the valve inlet end 2. A first conduit 22 is fixedly connected inside the inlet head 21, and a needle valve 23 is fixedly connected to the first conduit 22. The needle valve 23 can adjust the closing time of the main valve. Closing the needle valve clockwise can prolong the closing time of the main valve core, thereby achieving a slow closing effect and reducing the water hammer phenomenon. Increasing the opening of the needle valve counterclockwise can speed up the closing time of the main valve, and the closing time of the main valve can be adjusted within 30S-60S. A check valve is arranged inside the needle valve 23, and the needle valve 23 is fixedly connected to the inside of the main valve base 3.

[0029] See also Figure 1-3The main valve base 3 includes a valve head 31, a valve stem 39 is fixedly connected to the bottom of the valve head 31, the valve head 31 is arranged on the upper surface of the main valve base 3, a connecting rod base 32 is fixedly installed on the outer wall of the valve head 31, a connecting rod 33 is fixedly connected to the outer wall of the connecting rod base 32, a rotating rod 34 is movably installed on the outer wall of the connecting rod 33, a rocker 35 is fixedly connected to the outer wall of the rotating rod 34, a travel switch 36 is fixedly connected to the rocker 35, and the travel switch 36 is controlled by the main valve core. When the main valve core is closed by 90%, a signal is output to the water pump control circuit, and the water pump stops working. Some use swing arm switches, while others use proximity switches. The travel switch 36 is fixedly installed on the outer wall of the travel switch base 37. The travel switch base 37 is arranged on the outer wall of the valve stem 39. The outer wall of the valve stem 39 is provided with a fixing nut 38. The fixing nut 38 fixes the travel switch base 37 and the top of the main valve base 3. The main valve base 3 is sealed and installed with the control valve 1 through a flange. A valve core diaphragm 311 is arranged between the two flanges. The valve core diaphragm 311 is arranged inside the upper valve core 310. The upper valve core 310 is fixedly installed on the outer wall of the valve stem 39. A valve core 312 is fixedly installed below the upper valve core 310. A lower valve core 313 is fixedly connected below the valve core 312. A partition 11 is arranged inside the control valve 1. The partition 11 is provided with a water through hole. The outer walls on both sides of the water through hole are fixedly installed with a limit plate base 12. The outer walls of the limit plate base 12 on both sides are fixedly connected with the limit plate 13. The valve stem 39 is movably installed inside the limit plate 13.

[0030] See also Figure 4 The valve outlet end 4 includes a second conduit 41, which is arranged on the outer wall of the valve outlet end 4. A pressure gauge 48 is arranged on the outer wall of the valve outlet end 4. A ball valve 42 is arranged inside the lower part of the second conduit 41, and a check valve 43 is arranged inside the middle of the second conduit 41. A first shunt pipe 44 is fixedly connected to the outer wall of the check valve 43. A solenoid valve 45 is arranged above the second conduit 41. The voltage of the solenoid valve 45 is usually AC220V or DC24V. A second shunt pipe 46 is fixedly connected to the outer wall of the solenoid valve 45. The first shunt pipe 44 and the second shunt pipe 46 are fixedly connected to the integrated pipe 47. The integrated pipe 47 is fixedly connected to the inside of the main valve base 3. When the solenoid valve 45 is opened, the lower valve core 313 is opened. After the solenoid valve 45 is closed, the lower valve core 313 is closed by 90%.

[0031] Working principle: First, the control valve 1 starts to work. When water starts to be supplied through the valve inlet end 2, the solenoid valve 45 is first energized to open. Water enters the main valve base 3 through the needle valve 23 and the check valve inside the needle valve, reaches the top of the valve core diaphragm 311, and then flows through the solenoid valve 45 and the ball valve 42 to the outlet. At this time, the pressure in the upper cavity of the main valve diaphragm is reduced, and the medium cannot flow out of the other cavity because the check valve 43 on the conduit is closed. Under the pressure difference between the upper and lower cavities of the valve core diaphragm 311, the main valve core is opened and normal water supply begins.

[0032] Secondly, when it is necessary to stop the water supply, the solenoid valve 45 is closed, the upper cavity of the valve core diaphragm 311 stops draining, and the pressure in the control chamber increases. Since the area of ​​the valve core diaphragm 311 is larger than the area of ​​the upper valve core 310, under the action of the pressure difference between the two, the upper valve core 310 and the lower valve core 313 begin to close. When closed to 90%, the valve head 31 connects to the travel switch 36 to output a pump stop signal, and the water pump stops running. At this time, the downstream return water enters the main valve control chamber through the check valve 43. Since the check valve at the needle valve 23 is closed, the medium in the upper cavity of the diaphragm cannot flow out, the pressure in the control chamber increases, and the main valve gradually closes.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-flap sealed hydraulic control valve, comprising a control valve (1), a valve inlet end (2), a main valve base (3), and a valve outlet end (4), characterized in that: A valve inlet end (2) is provided on one side of the control valve (1), and a valve outlet end (4) is provided on the other side of the control valve (1); The valve outlet end (4) comprises a second conduit (41), the second conduit (41) is arranged on the outer wall of the valve outlet end (4), a pressure gauge (48) is arranged on the outer wall of the valve outlet end (4), a ball valve (42) is arranged inside the lower part of the second conduit (41), a check valve (43) is arranged in the middle of the second conduit (41), the outer wall of the check valve (43) is fixedly connected to a first shunt pipe (44), an electromagnetic valve (45) is arranged above the second conduit (41), the outer wall of the electromagnetic valve (45) is fixedly connected to a second shunt pipe (46), the first shunt pipe (44) and the second shunt pipe (46) are fixedly connected to an integrated pipe (47), and the integrated pipe (47) is fixedly connected to the inside of the main valve base (3).

2. The double-flap sealed hydraulic control valve according to claim 1, characterized in that: The valve inlet end (2) comprises a water inlet head (21), the water inlet head (21) is arranged on the outer wall of the valve inlet end (2), a first conduit (22) is fixedly connected to the inside of the water inlet head (21), a needle valve (23) is fixedly connected to the first conduit (22), a check valve is arranged inside the needle valve (23), and the needle valve (23) is fixedly connected to the inside of the main valve base (3).

3. The double-flap sealed hydraulic control valve according to claim 1, characterized in that: The main valve base (3) comprises a valve head (31), a valve stem (39) is fixedly connected to the bottom of the valve head (31), the valve head (31) is arranged on the upper surface of the main valve base (3), a connecting rod base (32) is fixedly mounted on the outer wall of the valve head (31), a connecting rod (33) is fixedly connected to the outer wall of the connecting rod base (32), a rotating rod (34) is movably mounted on the outer wall of the connecting rod (33), a rocker (35) is fixedly connected to the outer wall of the rotating rod (34), and the rocker (35) is fixedly connected to a travel switch (36).

4. The double-flap sealed hydraulic control valve according to claim 3, characterized in that: The travel switch (36) is fixedly mounted on the outer wall of the travel switch base (37); the travel switch base (37) is arranged on the outer wall of the valve stem (39); the outer wall of the valve stem (39) is provided with a fixing nut (38); the fixing nut (38) fixes the travel switch base (37) and the top of the main valve base (3).

5. The double-flap sealed hydraulic control valve according to claim 4, characterized in that: The main valve base (3) is sealed and installed with the control valve (1) via a flange plate, a valve core diaphragm (311) is arranged between the two flange plates, the valve core diaphragm (311) is arranged inside the upper valve core (310), the upper valve core (310) is fixedly installed on the outer wall of the valve stem (39), a valve core (312) is fixedly installed below the upper valve core (310), and a lower valve core (313) is fixedly connected below the valve core (312).

6. The double-flap sealed hydraulic control valve according to claim 1, characterized in that: A partition (11) is arranged inside the control valve (1), and a water through hole is opened in the partition (11). Limiting plate bases (12) are fixedly installed on the outer walls on both sides of the water through hole. The outer walls of the limiting plate bases (12) on both sides are fixedly connected to limiting plates (13), and a valve stem (39) is movably installed inside the limiting plate (13).

7. The double-flap sealed hydraulic control valve according to claim 1 or 5, characterized in that: When the electromagnetic valve (45) is opened, the lower valve core (313) is opened, and when the electromagnetic valve (45) is closed, the lower valve core (313) is closed by 90%.

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