A hydraulic regulating valve

Abstract

The present invention discloses a hydraulic regulating valve, which is provided with a first spring, a first valve core, a second spring, and a second valve core, so that the valve body has two working states. In the first state, the first valve core is in a high position state, and the first spring is in a working state. In the second state, the first valve core is in a low position, and the second spring is in a stressed working state. After the valve body has been used in the second state for a period of time, the working state of the valve body can be switched to the first state by adjusting the position of the first valve core upward. In this way, the working state of the valve body can be switched between the first state and the second state, so that the first spring and the second spring do not need to be in a stressed working state for a long time. When the first spring or the second spring is not working, the stress therein can be released, and the accumulated fatigue can be relieved, thereby extending the service life of the first spring and the second spring.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic valves, and particularly to a hydraulic regulating valve. Background Art

[0002] A hydraulic valve is an automated component operated by pressure oil. It is controlled by the pressure oil of a pilot valve and is usually used in combination with an electromagnetic pilot valve. It can be used to remotely control the opening and closing of the oil, gas, and water pipeline systems in a hydropower station. It is commonly used in oil circuits such as clamping, control, and lubrication. There are direct-acting and pilot-operated types, with the pilot-operated type being more commonly used. Classified by function, those that control pressure are called pressure valves, those that control flow are called flow control valves, and those that control on / off and flow direction are called direction control valves.

[0003] Among them, the pressure valve is mainly used to meet the requirements of force or torque for the actuator. For example, a Chinese utility model patent with a publication number of CN 213776425 U discloses a new type of hydraulic regulating valve assembly, including a fixing member. The shape of the fixing member is in the shape of the Chinese character "Wang". A push button is movably connected to the top of the fixing member. One end of the push button is fixedly connected to a pressing plate. The pressing plate is arranged inside the top end of the fixing member. A first spring is fixedly connected to the bottom of the pressing plate. The end of the first spring away from the pressing plate is fixedly connected to the inner wall of the fixing member. A telescopic column is arranged inside the first spring. The telescopic column is arranged below the pressing plate.

[0004] In this utility model, a valve core and a spring are provided to control the pressure conditions at the inlet and outlet of the valve body. However, in this valve body, during the operation of the hydraulic valve, the spring is always in a stressed state, and the stress inside it cannot be released. After being used for a period of time, the spring is easily damaged due to fatigue, which further leads to inaccurate pressure regulation of the hydraulic valve, and even the function of the hydraulic valve cannot be realized due to the fatigue failure of the spring. Summary of the Invention

[0005] The technical problem solved by the present invention is that during the operation of the hydraulic valve, the spring is always in a stressed state, and the stress inside it cannot be released. After being used for a period of time, the spring is easily damaged due to fatigue, which further leads to inaccurate pressure regulation of the hydraulic valve, and even the function of the hydraulic valve cannot be realized due to the fatigue failure of the spring.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] A hydraulic regulating valve, comprising:

[0008] A valve body, an inlet and an outlet are provided on the valve body, and a first chamber communicating with the inlet and the outlet respectively is provided inside the valve body;

[0009] a first adjusting rod, wherein the first adjusting rod threadably penetrates the valve body, and one end of the first adjusting rod is located in the first chamber;

[0010] a first valve core, wherein the first valve core is slidably disposed in the first chamber, a first spring is disposed between the first valve core and the first adjusting rod for connecting the two, a second chamber is defined in the first valve core, and a second passage communicating with the second chamber is defined in the first valve core;

[0011] a second adjusting rod, wherein the second adjusting rod threadably passes through the first adjusting rod;

[0012] a second valve core, the second valve core being slidably disposed in the second chamber, and a second spring being disposed between the second valve core and the second regulating rod for connecting the two;

[0013] Wherein, when the first valve core is located at one end of the first chamber away from the first regulating rod, both ends of the second channel can be communicated with the inlet and the outlet respectively.

[0014] As a further solution of the present invention: a third channel is opened in the valve body, one end of the third channel is connected to the inlet, and the other end of the third channel is connected to the first chamber.

[0015] As a further solution of the present invention: an adjusting cavity is provided in the first adjusting rod, a connecting portion is provided in the adjusting cavity, and the connecting portion is threadedly sleeved on the second adjusting rod.

[0016] As a further solution of the present invention: a square head is provided at one end of the first regulating rod located outside the valve body.

[0017] As a further solution of the present invention: a recess is formed at one end of the second adjusting rod located outside the first adjusting rod.

[0018] As a further solution of the present invention: a straight groove is provided at one end of the second regulating rod located outside the valve body, and an operating rod is rotatably connected in the straight groove.

[0019] As a further solution of the present invention: a plug-in is fixedly connected to one side of the operating rod, and a slot is formed at one end of the first adjusting rod located outside the valve body, and the size of the slot matches the size of the plug-in.

[0020] A hydraulic regulating valve according to the present invention has at least one of the following technical effects:

[0021] A first spring, a first valve core, a second spring, and a second valve core are provided, so that the valve body has two working states. In the first state, the first valve core is in a high position state, at which time the inlet, the first chamber, and the outlet can be connected to form a first channel, the first spring is in a working state, and the second spring can be adjusted to a state without stress. In the second state, the first valve core is in a low position, the second spring is in a stressed working state, and the first spring can be in an original length state without stress, so that the stress accumulated by the first spring after long-term work can be released, so that its fatigue can be relieved, and it is prevented from being in a stressed working state all the time, resulting in a shortened service life. After the valve body is used in the second state for a period of time, the working state of the valve body can be switched to the first state by adjusting the position of the first valve core upwards, so that the working state of the valve body can be switched between the first state and the second state, so that the first spring and the second spring do not need to be in a stressed working state for a long time. When the first spring or the second spring is not working, the stress in it can be released, and its accumulated fatigue can be relieved, thereby extending the service life of the first spring and the second spring. Even if one of the springs fails or is damaged, the working state of the valve body can be switched to another state to ensure the normal operation of the hydraulic system. There is no need to shut down the hydraulic system immediately. Instead, the hydraulic system can be processed at the right time according to production needs to minimize the impact on production.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a schematic diagram of the overall structure of the existing hydraulic valve;

[0025] Figure 2 It is a structural schematic diagram of a cross section of an existing hydraulic valve;

[0026] Figure 3 It is a structural schematic diagram of the first valve core of the present invention in a high position state;

[0027] Figure 4 It is a structural schematic diagram of the first valve core of the present invention in a low position state;

[0028] Figure 5 It is a schematic structural diagram of the connection between the first adjusting rod and the second adjusting rod of the present invention;

[0029] Figure 6It is a structural schematic diagram of the square head of the present invention;

[0030] Figure 7 The present invention Figure 4 A schematic diagram of the structure with a partial enlargement at the center;

[0031] Figure 8 The present invention Figure 7 Schematic diagram of the structure of another state.

[0032] In the figure: 100, valve body; 101, first chamber; 102, first adjusting rod; 103, first valve core; 104, second chamber; 105, second channel; 106, second adjusting rod; 107, second valve core; 108, third channel; 109, connecting part; 110, square head; 111, operating rod; 112, plug-in. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are 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 device or element referred to 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.

[0035] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] A hydraulic valve is an automatic component operated by pressure oil. It is controlled by the pressure oil of a pressure regulating valve and is usually used in combination with an electromagnetic pressure regulating valve. It can be used to remotely control the on / off of the oil, gas, and water pipeline systems of a hydropower station. Hydraulic valves can be divided into pressure valves, flow valves, and directional control valves according to their functions. Among them, pressure valves are used to control pressure, thereby meeting the force or torque requirements of the actuator. Please refer to Figure 1 and Figure 2The existing commonly used pressure valve includes a valve body 100 with an inlet and an outlet, and a valve core and a spring are arranged in the valve body 100. The elastic force of the spring can control the pressure value of the inlet and outlet connection state, thereby achieving the purpose of controlling the pressure. However, the pressure valve usually works for a long time in the hydraulic system. Therefore, the spring is always in a compressed state, and the stress in the spring cannot be released. After a period of use, the spring is easily damaged due to fatigue, which leads to inaccurate pressure regulation of the hydraulic valve, and even the function of the hydraulic valve cannot be realized due to fatigue failure of the spring. When the spring fails, it needs to be disassembled, replaced and repaired, and the entire hydraulic system needs to be shut down, which will affect the normal operation of the entire equipment related to the hydraulic system.

[0037] See also Figure 3-8 As shown, the present invention provides a hydraulic regulating valve, including a valve body 100, a first regulating rod 102, a first valve core 103, a second regulating rod 106, and a second valve core 107. The valve body 100 is provided with an inlet and an outlet, and the valve body 100 is provided with a first chamber 101 which is connected with the inlet and the outlet respectively; the first regulating rod 102 is threadedly penetrated through the valve body 100, and one end of the first regulating rod 102 is located in the first chamber 101; the first valve core 103 is slidably arranged in the first chamber 101, a first spring for connecting the first valve core 103 and the first regulating rod 102 is arranged between the first valve core 103 and the first regulating rod 102, and a second chamber 104 is provided in the first valve core 103, and a second channel 105 which is connected with the second chamber 104 is provided in the first valve core 103; the second regulating rod 106 is threadedly penetrated through the first regulating rod 102; the second valve core 107 is slidably arranged in the second chamber 104, and a second spring for connecting the second valve core 107 and the second regulating rod 106 is arranged between the second valve core 107 and the second regulating rod 106.

[0038] See also Figure 3-4 As shown, in one embodiment of the present invention, an inlet and an outlet are provided on the valve body 100, and the inlet and the outlet are used for the entry and discharge of the pressure medium, respectively, and are connected to corresponding pipes when in use. The height positions of the inlet and the outlet can be equal, or a height difference can be provided. The most commonly used hydraulic valve in the existing pressure system is hydraulic oil as the hydraulic medium, and hydraulic oil is used as an example of the pressure medium here. A first chamber 101 connected to the inlet and the outlet, respectively, is provided in the valve body 100; the left side of the first chamber 101 is connected to the inlet for the hydraulic oil to enter the first chamber 101. The right side of the first chamber 101 is connected to the outlet for the discharge of the hydraulic oil.

[0039] See also Figure 3-4As shown, in one embodiment of the present invention, the first adjusting rod 102 is threadedly penetrated through the valve body 100, and one end of the first adjusting rod 102 is located in the first chamber 101. That is, a through hole is provided on the valve body 100, an internal thread is provided in the through hole, the first adjusting rod 102 is provided in the through hole, and an external thread is provided on the outer circumferential surface of the first adjusting rod 102. The first adjusting rod 102 is in transmission connection with the through hole thread. When in use, the height position of the lower end of the first adjusting rod 102 in the first chamber 101 can be adjusted by rotating the first adjusting rod 102.

[0040] See also Figure 3-4 As shown, in one embodiment of the present invention, the first valve core 103 is slidably disposed in the first chamber 101, and the first valve core 103 and the first chamber 101 form a piston fit. A first spring for connecting the first valve core 103 and the first adjusting rod 102 is disposed between the first valve core 103 and the first adjusting rod 102, and the first spring is located between the two to provide an elastic force to keep the two away from each other, and the two ends of the first spring can be fixedly connected. A second chamber 104 is provided in the first valve core 103, and a second channel 105 communicating with the second chamber 104 is provided in the first valve core 103; the two ends of the second channel 105 can be communicated with the inlet and the outlet. When the first valve core 103 is located at one end of the first chamber 101 away from the first adjusting rod 102, that is, when the first valve core 103 is at the lowest end inside the first chamber 101, the two ends of the second channel 105 can be communicated with the inlet and the outlet respectively, so that the hydraulic oil can enter the second chamber 104 from the inlet through the second channel 105, and then be transported to the outlet from the other end of the second channel 105.

[0041] See also Figure 3-4 As shown, in one embodiment of the present invention, the second adjusting rod 106 is threadedly penetrated through the first adjusting rod 102; the first adjusting rod 102 and the second adjusting rod 106 are coaxially arranged. That is, a threaded hole along the axis direction is opened in the first adjusting rod 102, the second adjusting rod 106 is arranged in the threaded hole, and an external thread is arranged on the outer circumferential surface of the second adjusting rod 106, so that the two are threadedly connected. When the second adjusting rod 106 rotates relative to the first adjusting rod 102, the two can be relatively displaced in the axis direction, thereby changing the height position of the lower end of the second adjusting rod 106.

[0042] See also Figure 3-4 As shown, in one embodiment of the present invention, the second valve core 107 is slidably disposed in the second chamber 104, so that the second valve core 107 forms a piston structure in the second chamber 104. A second spring is disposed between the second valve core 107 and the second adjusting rod 106 for connecting the two; the second spring is located between the two and is used to provide an elastic force to keep the two away from each other.

[0043] When the device is in use, in the first state, the first valve core 103 is in a high position. At this time, the inlet, the first chamber 101, and the outlet can be connected to form a first channel. The hydraulic oil enters the first chamber 101 through the inlet. Under the action of the first spring and the first valve core 103, a certain hydraulic pressure is maintained and discharged from the outlet. By rotating the first adjusting rod 102, the height position of the lower end of the first adjusting rod 102 can be changed, that is, the position of the upper end of the first spring is changed, and then the pressure in the first chamber 101 controlled by the first spring and the first valve core 103 can be changed within a certain range. In the first state, the second channel 105 is not connected with the first chamber 101, the inlet, and the outlet. At this time, the second spring can be kept in the original length state by adjusting the height position of the second adjusting rod 106. At this time, the second spring is not subjected to force and will not be fatigued. When necessary, the position of the first valve core 103 can be continuously adjusted downward by the first adjusting rod 102 until the second channel 105 is connected with the first chamber 101, the inlet, and the outlet. At this time, the hydraulic oil will enter the second channel 105, and at the same time, exert downward pressure on the first valve core 103, so that the first valve core 103 is displaced to the lowest end of the first chamber 101. At this time, the first valve core 103 is in a low position, and the circulation of the valve body 100 is in the second state. In the second state, the hydraulic oil enters the second chamber 104 through the inlet end of the second channel 105, and then overcomes the elastic force of the second spring by squeezing the second valve core 107, and then is discharged to the outlet position through the outlet end of the second channel 105. That is, the pressure of the hydraulic valve is controlled by the second spring. In this process, the first valve core 103 is in a low position and remains stable. Therefore, the first spring can be restored to its original length state without stress by adjusting the position of the first adjusting rod 102, so that the stress accumulated by the first spring after long-term work can be released, so that its fatigue can be relieved, and it is prevented from being in a stressed working state all the time, resulting in a shortened service life. After the valve body 100 has been in the second state for a period of time, the working state of the valve body 100 can be switched to the first state by adjusting the position of the first valve core 103 upwards. In this way, the working state of the valve body 100 can be switched between the first state and the second state, so that the first spring and the second spring do not need to be in a stressed working state for a long time. When the first spring or the second spring is not working, the stress inside it can be released, and the accumulated fatigue can be relieved, thereby extending the service life of the first spring and the second spring. Even if one of the springs fails or is damaged, the working state of the valve body 100 can be switched to another state to ensure the normal operation of the hydraulic system. There is no need to shut down the hydraulic system immediately, but the hydraulic system can be processed at the right time according to production needs to minimize the impact on production.The method for adjusting the position of the first valve core 103 can be to drive the first valve core 103 upward by a fixedly connected spring, or to set a lifting structure below the first valve core 103 to lift the first valve core 103, thereby changing its height position. The structure can be a slidingly connected push rod, or a threaded transmission structure with a threaded connection.

[0044] See also Figure 3-4 As shown, in one embodiment of the present invention, a third channel 108 is provided in the valve body 100, one end of the third channel 108 is connected to the inlet, and the other end of the third channel 108 is connected to the first chamber 101. In the first state, when the lower end of the first valve core 103 is located below the inlet position, and the second channel 105 is not connected to the inlet, it is difficult for the hydraulic oil to effectively lift the first valve core 103. By providing the third channel 108, and the outlet end of the third channel 108 is located near the lower end of the first chamber 101, when the above situation occurs, the hydraulic oil in the inlet can enter the first chamber 101 through the third channel 108, and then smoothly lift the first valve core 103, so that the device can function normally. When in the second state, the first valve core 103 is at the lowest end, and the side of the first valve core 103 closes the outlet of the third channel 108.

[0045] See also Figure 5 As shown, in one embodiment of the present invention, an adjustment cavity is provided in the first adjustment rod 102, a connecting portion 109 is provided in the adjustment cavity, and the connecting portion 109 is threadedly sleeved on the second adjustment rod 106. By providing a larger adjustment cavity, the adjustable travel distance of the first adjustment rod 102 can be effectively increased.

[0046] Specifically, the specific method of rotating the first adjustment rod 102 and the second adjustment rod 106 is not limited. Figure 6 As shown, in one embodiment of the present invention, a square head 110 is provided at one end of the first adjusting rod 102 located outside the valve body 100. The square head 110 structure can be used to rotate the first adjusting rod 102. A sink groove is provided at one end of the second adjusting rod 106 located outside the first adjusting rod 102. A tool can be inserted into the sink groove to drive the second adjusting rod 106 to rotate. In order to maintain stability, a tool can also be used to keep the other adjusting rod stable when rotating one of the adjusting rods.

[0047] See also Figure 7-8As shown, in one embodiment of the present invention, a slot is formed at one end of the second adjusting rod 106 located outside the valve body 100, and an operating rod 111 is rotatably connected in the slot. A plug-in 112 is fixedly connected to one side of the operating rod 111, and a slot is formed at one end of the first adjusting rod 102 located outside the valve body 100, and the size of the slot matches the size of the plug-in 112. When in use, when the second adjusting rod 106 located inside needs to be rotated, the operating rod 111 can be placed in the position shown in FIG. Figure 7 In the state shown, the second adjustment rod 106 can be rotated by the operating rod 111. When the first adjustment rod 102 located outside needs to be rotated, the operating rod 111 is flipped 180°, and the plug-in 112 is engaged with the slot, thereby driving the first adjustment rod 102 to rotate. After the first adjustment rod 102 is completely rotated, the operating rod 111 is flipped to adjust the position of the second adjustment rod 106.

[0048] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A hydraulic regulating valve, It is characterized in that include: A valve body (100), wherein an inlet and an outlet are formed on the valve body (100), and a first chamber (101) is formed inside the valve body (100) and is communicated with the inlet and the outlet respectively; a first adjusting rod (102), the first adjusting rod (102) passing through the valve body (100), the first adjusting rod (102) and the valve body (100) being threadedly connected, one end of the first adjusting rod (102) being located in the first chamber (101); a first valve core (103), the first valve core (103) being slidably disposed in the first chamber (101), a first spring being disposed between the first valve core (103) and the first regulating rod (102) for connecting the two, a second chamber (104) being defined in the first valve core (103), and a second channel (105) being defined in the first valve core (103) and communicating with the second chamber (104); A second adjusting rod (106), wherein the second adjusting rod (106) is threadedly passed through the first adjusting rod (102); a second valve core (107), the second valve core (107) being slidably disposed in the second chamber (104), and a second spring for connecting the second valve core (107) and the second adjusting rod (106) being disposed between the second valve core (107) and the second adjusting rod (106); The valve body (100) includes two states: In the first state, the first valve core (103) is in a high position state, at which time the inlet, the first chamber (101) and the outlet are connected to form a first channel, and the first spring is in a working state; the second channel (105) is not connected to the first chamber (101), the inlet and the outlet, and the second spring can be adjusted to a stress-free state; In the second state, the first valve core (103) is in a low position, and the first spring can be in an original length state without being stressed; the second channel (105) and the second chamber (104) are connected to the inlet and the outlet, and the second spring is in a working state.

2. A hydraulic regulating valve according to claim 1, It is characterized in that A third channel (108) is provided in the valve body (100); one end of the third channel (108) is communicated with the inlet, and the other end of the third channel (108) is communicated with the first chamber (101).

3. A hydraulic regulating valve according to claim 1, It is characterized in that An adjusting cavity is provided in the first adjusting rod (102), a connecting portion (109) is provided in the adjusting cavity, and the connecting portion (109) is threadedly sleeved on the second adjusting rod (106).

4. A hydraulic regulating valve according to any one of claims 1 to 3, It is characterized in that A square head (110) is provided at one end of the first adjusting rod (102) located outside the valve body (100).

5. A hydraulic regulating valve according to claim 4, It is characterized in that A recess is formed at one end of the second adjusting rod (106) located outside the first adjusting rod (102).

6. A hydraulic regulating valve according to any one of claims 1 to 3, It is characterized in that A straight groove is formed at one end of the second adjusting rod (106) located outside the valve body (100), and an operating rod (111) is rotatably connected in the straight groove.

7. A hydraulic regulating valve according to claim 6, It is characterized in that A plug-in unit (112) is fixedly connected to one side of the operating rod (111), and a slot is provided at one end of the first adjusting rod (102) located outside the valve body (100), wherein the size of the slot matches the size of the plug-in unit (112).

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