One-way pressure reducing valve

Abstract

The invention discloses a one-way pressure reducing valve, and belongs to the technical field of valves. The one-way pressure reducing valve comprises a valve body, a pressure reducing valve element and a one-way assembly. The valve body is provided with a valve cavity, an oil inlet, an oil outlet and a first sealing opening capable of communicating the oil inlet with the oil outlet. The pressure reducing valve element is arranged in the valve cavity in a sliding mode and can be switched between a communicating position and a blocking position, a first conical surface is arranged on the outer wall of the pressure reducing valve element, and conical surface sealing is formed between the first conical surface and the first sealing opening; a valve element cavity is formed in the pressure reducing valve element, the oil inlet end of the valve element cavity is communicated with the pressure reducing oil port, and an oil passing channel communicated with the oil inlet is further arranged on the side wall of the pressure reducing valve element. The one-way assembly is adjustably arranged in the valve element cavity and can selectively open a passage between the oil inlet end and the oil passing channel. According to the one-way pressure reducing valve, hydraulic oil can be prevented from leaking from a gap between the valve element and the valve sleeve when the pressure reducing valve opening is closed, and pressure can be effectively relieved under the condition that an oil inlet is unloaded.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a one-way pressure reducing valve. Background Art

[0002] The hydraulic threaded cartridge pressure reducing valve is a valve installed in the hydraulic system through a threaded connection. It is used to control the pressure in the system to ensure stable and efficient operation of the system. The hydraulic threaded cartridge pressure reducing valve is widely used in the clamping mechanism of machine tools and the brake hydraulic system of wind turbines due to its high reliability, convenient adjustment and strong adaptability.

[0003] The hydraulic threaded cartridge pressure reducing valve in the related art usually has the following problems when in use:

[0004] 1) When the load at the pressure reducing oil port is greater than the preload of the pressure regulating spring, causing the pressure reducing valve port to close, the hydraulic oil at the oil inlet will inevitably leak from the gap between the valve core and the valve sleeve, causing the pressure at the pressure reducing oil port to continue to increase, thereby causing damage to the actuator or workpiece;

[0005] 2) In the case of unloading at the oil inlet, when the set pressure relief pressure is small and the flow rate is large, the reverse flow of the hydraulic oil at the pressure relief oil port can easily cause the pressure relief valve port to close, making it impossible to effectively relieve pressure.

[0006] Therefore, a one-way pressure reducing valve is urgently needed to solve the above problems. Summary of the invention

[0007] The object of the present invention is to solve or at least alleviate part or all of the above problems. To this end, the object of the present invention is to provide a one-way pressure reducing valve, which can prevent the hydraulic oil from leaking from the gap between the valve core and the valve sleeve when the pressure reducing valve port is closed, and can effectively relieve pressure when the oil inlet is unloaded.

[0008] In order to achieve the above object, the present invention adopts the following technical solution:

[0009] A one-way pressure reducing valve, comprising:

[0010] A valve body, the valve body having a valve cavity, an oil inlet, an oil outlet, and a first sealing port capable of communicating with the oil inlet and the oil outlet, the oil inlet being connected to a high-pressure oil port, and the oil outlet being connected to a pressure-reducing oil port;

[0011] A pressure reducing valve core is slidably disposed in the valve cavity and can be switched between a communication position away from the first sealing port and a blocking position sealing the first sealing port. A first conical surface is disposed on the outer wall of the pressure reducing valve core. When the pressure reducing valve core is in the blocking position, a conical surface seal is formed between the first conical surface and the first sealing port. A valve core cavity is provided in the pressure reducing valve core, and an oil inlet end of the valve core cavity is connected to the pressure reducing oil port. An oil passage connected to the oil inlet is also disposed on the side wall of the pressure reducing valve core.

[0012] A one-way component is adjustably arranged in the valve core cavity, and the one-way component can selectively open the passage between the oil inlet end and the oil passage, and only allows hydraulic oil to flow from the oil inlet end to the oil passage.

[0013] As a preferred solution of the one-way pressure reducing valve provided by the present invention, a second sealing port is further provided between the oil inlet end and the oil passage to connect the two;

[0014] The one-way assembly includes a one-way valve core and an elastic member. The one-way valve core is slidably disposed in the valve core cavity to switch between an open position away from the second sealing port and a closed position sealing the second sealing port. The elastic member is in a compressed state and is used to move the one-way valve core to the closed position of the second sealing port.

[0015] As a preferred solution of the one-way pressure reducing valve provided by the present invention, a second conical surface is provided on the outer wall of the one-way valve core, and when the one-way valve core is in the closed position of the second sealing port, a conical surface seal is formed between the second conical surface and the second sealing port.

[0016] As a preferred solution of the one-way pressure reducing valve provided by the present invention, the pressure reducing valve core comprises:

[0017] A valve core body is slidably disposed in the valve cavity, the valve core cavity is disposed through the valve core body along the axial direction of the valve core body, and one end of the valve core cavity is opened to form the oil inlet end;

[0018] The spring seat is connected to the other end opening of the valve core cavity, and the two ends of the elastic member are respectively pressed against the valve core body and the spring seat.

[0019] As a preferred solution of the one-way pressure reducing valve provided by the present invention, a first accommodating groove for accommodating part of the elastic member is provided on the spring seat; and / or a second accommodating groove for accommodating part of the elastic member is provided on the one-way valve core.

[0020] As a preferred solution of the one-way pressure reducing valve provided by the present invention, a pressure relief channel is opened in the one-way valve core, one end of the pressure relief channel is connected to the gap between the one-way valve core and the spring seat, and the other end of the pressure relief channel is connected to the oil passage.

[0021] As a preferred solution of the one-way pressure reducing valve provided by the present invention, a first limiting portion is provided at one end of the pressure reducing valve core away from the oil outlet, and a second limiting portion is provided on the cavity wall of the valve cavity, and the first limiting portion can be abutted against the second limiting portion to limit the maximum sliding distance of the pressure reducing valve core in the valve cavity.

[0022] As a preferred solution of the one-way pressure reducing valve provided by the present invention, the one-way pressure reducing valve further includes an elastic component, and the elastic component includes:

[0023] an adjusting member, at least partially adjustably connected to the valve cavity;

[0024] The pressure regulating spring is arranged in a compressed state between the regulating member and the pressure reducing valve core.

[0025] As a preferred solution of the one-way pressure reducing valve provided by the present invention, the regulating member is completely located in the valve cavity, and the one-way pressure reducing valve also includes a sealing assembly, which includes a plug sealedly connected to one end of the valve body away from the pressure reducing valve core.

[0026] As a preferred solution of the one-way pressure reducing valve provided by the present invention, the sealing assembly also includes a sealing gasket, the plug is threadedly connected to the valve body, and a screw groove is provided at the outward end of the plug, and the sealing gasket is installed in the screw groove.

[0027] As a preferred solution of the one-way pressure reducing valve provided by the present invention, a third limiting portion is provided on the outer periphery of the plug. When the third limiting portion abuts against the end of the valve body away from the oil outlet, the plug and the adjusting member are spaced axially along the valve body.

[0028] As a preferred solution of the one-way pressure reducing valve provided by the present invention, the regulating member is completely located in the valve cavity, and the elastic component also includes a limit member, and two ends of the limit member are respectively pressed against the outer wall of the regulating member and the cavity wall of the valve cavity.

[0029] The beneficial effects of the present invention are:

[0030] The one-way pressure reducing valve provided by the present invention provides a first conical surface on the pressure reducing valve core so that the first conical surface can cooperate with the oil outlet to form a conical surface seal with good sealing effect, and can prevent the hydraulic oil at the oil inlet from leaking from the gap between the pressure reducing valve core and the valve cavity when the pressure reducing valve core is in a blocked position, causing the pressure at the pressure reducing oil port to continue to increase, thereby causing damage to the actuator or the workpiece; an adjustable one-way component is provided in the valve core cavity of the pressure reducing valve core, when the oil inlet is unloaded, if the pressure of the pressure reducing oil port is greater than the pressure of the oil inlet, the one-way component can open the passage between the oil inlet end of the valve core cavity and the oil passage, at which time, the hydraulic oil at the pressure reducing oil port can flow out from the oil inlet through the valve core cavity, the valve core cavity and the oil passage of the pressure reducing valve core, so as to relieve the pressure of the pressure reducing oil port, thereby ensuring the normal operation of the entire one-way pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution in the present invention, the following briefly introduces the drawings required for use in the description of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the present invention and these drawings without paying any creative work.

[0032] Figure 1 It is a structural schematic diagram of the one-way pressure reducing valve provided by the present invention;

[0033] Figure 2 It is a schematic cross-sectional structural diagram of the one-way pressure reducing valve provided by the present invention;

[0034] Figure 3 yes Figure 2 The first part of the structural diagram;

[0035] Figure 4 It is a structural schematic diagram of the valve core body provided by the present invention;

[0036] Figure 5 It is a schematic cross-sectional structural diagram of the valve core body provided by the present invention;

[0037] Figure 6 It is a structural schematic diagram of the one-way valve core provided by the present invention;

[0038] Figure 7 It is a structural schematic diagram of the spring seat provided by the present invention;

[0039] Figure 8 is a schematic cross-sectional structural diagram of a spring seat provided by the present invention;

[0040] Fig. 9 It is a schematic cross-sectional structural diagram of a one-way valve core provided by the present invention;

[0041] Fig.10 is a schematic cross-sectional structural diagram of a valve seat provided by the present invention;

[0042] Fig.11 yes Figure 2 The second part of the structural diagram;

[0043] Fig.12 It is a structural schematic diagram of the adjusting member provided by the present invention.

[0044] Reference numerals:

[0045] 100, valve body; 1001, valve cavity; 1002, oil gap; 110, valve seat; 111, oil inlet; 112, oil outlet; 113, first sealing port; 114, oil return port; 115, second limiter; 120, valve sleeve;

[0046] 200, pressure reducing valve core; 201, valve core cavity; 2011, oil inlet end; 210, valve core body; 211, first conical surface; 212, second sealing port; 213, oil passage; 214, oil passage groove; 220, spring seat; 221, first accommodating groove; 222, first limiting portion;

[0047] 300, elastic component; 310, adjusting member; 311, limiting groove; 312, mounting groove; 320, pressure regulating spring; 330, limiting member;

[0048] 400, one-way assembly; 410, one-way valve core; 411, second receiving groove; 412, pressure relief channel; 4121, first channel; 4122, second channel; 413, second conical surface; 420, elastic member;

[0049] 500, plugging assembly; 510, plugging head; 511, screwing groove; 512, sealing groove; 513, third limiting part; 520, plugging gasket;

[0050] 600, seals;

[0051] i. High-pressure oil port; ii. Pressure-reducing oil port. DETAILED DESCRIPTION

[0052] Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings.

[0053] In the present invention, the terms "comprises", "includes", "has" or any other variations 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 includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0054] In the present invention, the term "and / or" is a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "and / or" relationship.

[0055] In the present invention, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and may include electrical connection or coupling.

[0056] In the present invention, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0057] In the present invention, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0058] In the present invention, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the present invention. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that the directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0059] Embodiment 1

[0060] Figure 1 A schematic structural diagram of the one-way pressure reducing valve provided in this embodiment is shown. Figure 2 A schematic cross-sectional structure diagram of the one-way pressure reducing valve provided in this embodiment is shown. Figure 3 Shows Figure 2 Schematic diagram of the first part of the structure. Figure 4 FIG. 2 shows a schematic diagram of the structure of the valve core body 210 provided in this embodiment. Figure 1-Figure 4 As shown, the present embodiment provides a one-way pressure reducing valve, which includes a valve body 100, a pressure reducing valve core 200 and a one-way assembly 400. The valve body 100 has a valve cavity 1001, an oil inlet 111, an oil outlet 112 and a first sealing port 113 that can connect the oil inlet 111 and the oil outlet 112. The oil inlet 111 is used to connect the high-pressure oil port i, and the oil outlet 112 is used to connect the pressure reducing oil port ii. The pressure reducing valve core 200 is slidably arranged in the valve cavity 1001, and can be switched between a communication position away from the first sealing port 113 and a blocking position that seals the first sealing port 113. The outer wall of the pressure reducing valve core 200 is provided with a There is a first conical surface 211. When the pressure reducing valve core 200 is in the blocking position, a conical surface seal is formed between the first conical surface 211 and the first sealing port 113; a valve core cavity 201 is opened in the pressure reducing valve core 200, and the oil inlet end 2011 of the valve core cavity 201 is connected with the pressure reducing oil port ii, and an oil passage 213 connected with the oil inlet 111 is also provided on the side wall of the pressure reducing valve core 200; the one-way component 400 is adjustably arranged in the valve core cavity 201, and the one-way component 400 can selectively open the passage between the oil inlet end 2011 and the oil passage 213, and only allows hydraulic oil to flow from the oil inlet end 2011 to the oil passage 213.

[0061] The one-way pressure reducing valve provided in the present embodiment provides a first conical surface 211 on the pressure reducing valve core 200 so that the first conical surface 211 can cooperate with the first sealing port 113 to form a conical surface seal, and the sealing effect is good, which can prevent the hydraulic oil at the oil inlet 111 from leaking from the gap between the pressure reducing valve core 200 and the valve cavity 1001 when the pressure reducing valve core 200 is in the blocking position, resulting in the pressure at the pressure reducing oil port ii continuing to increase, thereby causing the actuator or the workpiece to be damaged; by 1 is provided with an adjustable one-way component 400. When the oil inlet 111 is unloaded, if the pressure of the pressure reducing oil port ii is greater than the pressure of the oil inlet 111, the one-way component 400 can open the passage between the oil inlet end 2011 of the valve core chamber 201 and the oil passage 213. At this time, the hydraulic oil at the pressure reducing oil port ii can flow out from the oil inlet 111 through the oil inlet end 2011 of the valve core chamber 201, the valve core chamber 201, and the oil passage 213, so as to relieve the pressure of the pressure reducing oil port ii, thereby ensuring the normal operation of the entire one-way pressure reducing valve.

[0062] Furthermore, the valve body 100 includes a valve seat 110 and a valve sleeve 120 with a portion of the sealing sleeve disposed outside the valve seat 110. The valve cavity 1001 penetrates the valve seat 110 and the valve sleeve 120 along the axial direction of the valve body 100. This design can simplify the processing technology and avoid the excessive length of the valve body 100 along the axial direction affecting the processing accuracy. Among them, the oil inlet 111, the oil outlet 112 and the first sealing port 113 are all disposed on the valve seat 110. Optionally, the valve sleeve 120 is threadedly connected to the valve seat 110. The threaded connection has the advantages of simple structure, tight connection and convenient disassembly and assembly.

[0063] like Figure 3As shown, a second sealing port 212 is also provided between the oil inlet end 2011 and the oil passage 213 to connect the two; the one-way assembly 400 includes a one-way valve core 410 and an elastic member 420, the one-way valve core 410 is slidably disposed in the valve core cavity 201 to switch between an open position away from the second sealing port 212 and a closed position sealing the second sealing port 212, the elastic member 420 is disposed in a compressed state between one end of the valve core cavity 201 away from the oil inlet end 2011 and the one-way valve core 410, and is used to move the one-way valve core 410 to the closed position of the second sealing port 212. By arranging the elastic member 420 in a compressed state between the end of the valve core chamber 201 away from the oil inlet end 2011 and the one-way valve core 410, the elastic member 420 can have a preset preload force. When the oil inlet 111 is unloaded, if the pressure of the pressure relief oil port ii is greater than the pressure of the oil inlet 111, the hydraulic oil at the pressure relief oil port ii can push the one-way valve core 410 to slide to the open position, so that the hydraulic oil at the pressure relief oil port ii flows out from the oil inlet 111 through the oil inlet end 2011 of the valve core chamber 201, the gap between the second sealing port 212 and the one-way valve core 410, and the oil passage 213, so as to relieve the pressure of the pressure relief oil port ii. The one-way assembly 400 has a simple structure and is easy to operate, and can achieve rapid pressure relief of the pressure relief oil port ii when the oil inlet 111 is unloaded. In this embodiment, the elastic member 420 is a spring, which is easy to install and has low cost.

[0064] Figure 5 A schematic cross-sectional structure diagram of the valve core body 210 provided in this embodiment is shown. Figure 6 FIG. 4 shows a schematic diagram of the structure of the one-way valve core 410 provided in this embodiment. Figure 5-Figure 6 Combined with Figure 3 , Figure 4 As shown, a second conical surface 413 is provided on the outer wall of the one-way valve core 410. When the one-way valve core 410 is in the closed position of the second sealing port 212, a conical surface seal is formed between the second conical surface 413 and the second sealing port 212 to improve the sealing effect of the one-way valve core 410 in the closed position. Specifically, the cavity wall portion of the valve core cavity 201 is convex inward to form a first annular protrusion, and the first annular protrusion is formed on a side away from the oil inlet end 2011 to form the above-mentioned second sealing port 212, so as to cooperate with the second conical surface 413 of the one-way valve core 410 to form a conical surface sealing structure.

[0065] Optionally, the number of oil passages 213 is at least two, and at least two oil passages 213 are arranged at intervals along the circumference of the pressure reducing valve core 200, so that the hydraulic oil at the pressure reducing oil port ii can flow out through each oil passage 213 in time, thereby ensuring that the pressure reducing oil port ii is relieved in time.

[0066] Figure 7 FIG. 2 shows a schematic structural diagram of a spring seat 220 provided in this embodiment. Figure 8 FIG. 2 shows a cross-sectional structural diagram of the spring seat 220 provided in this embodiment. Figure 7-Figure 8 Combined with Figure 3 , Figure 5 As shown, the pressure reducing valve core 200 includes a valve core body 210 and a spring seat 220. The valve core body 210 is slidably disposed in the valve cavity 1001. The valve core cavity 201 is disposed in the valve core body 210 along the axial direction of the valve core body 210. One end of the valve core cavity 201 is opened to form the above-mentioned oil inlet end 2011. The spring seat 220 is connected to the other end of the valve core cavity 201. The two ends of the elastic member 420 are respectively pressed against the valve core body 210 and the spring seat 220. In this embodiment, the spring seat 220 is threadedly connected to the valve core body 210. The threaded connection has the advantages of being firmly connected and easy to disassemble and assemble. When assembling the one-way assembly 400 and the pressure reducing valve core 200, the one-way valve core 410 and the elastic member 420 can be inserted into the valve core cavity 201 from the side of the valve core cavity 201 away from the oil inlet end 2011, and then the spring seat 220 can be screwed onto the end of the valve core body 210 away from the oil inlet end 2011.

[0067] Fig. 9 FIG. 4 shows a cross-sectional structural diagram of the one-way valve core 410 provided in this embodiment. Fig. 9 Combined with Figure 3 , Figure 8 As shown, in some embodiments, a first receiving groove 221 is provided on the spring seat 220, and a second receiving groove 411 is provided on the one-way valve core 410. One end of the elastic member 420 is received in the first receiving groove 221, and the other end is received in the second receiving groove 411, so as to limit the expansion and contraction of the elastic member 420, and ensure that it can only expand and contract along its own axis direction, thereby ensuring that the pressure relief oil port ii can be timely depressurized. Of course, in some other embodiments, only the first receiving groove 221 for accommodating part of the elastic member 420 can be provided on the spring seat 220, or only the second receiving groove 411 for accommodating part of the elastic member 420 can be provided on the one-way valve core 410, and the above-mentioned effect can also be achieved.

[0068] like Figure 3 and Fig. 9As shown, a pressure relief channel 412 is provided in the one-way valve core 410, one end of the pressure relief channel 412 is connected to the gap between the one-way valve core 410 and the spring seat 220, and the other end of the pressure relief channel 412 is connected to the oil passage 213. When the oil inlet 111 is unloaded, if the pressure of the pressure relief oil port ii is greater than the pressure of the oil inlet 111, the hydraulic oil at the pressure relief oil port ii can enter the valve core cavity 201 from the oil inlet end 2011 and push the one-way valve core 410 to move away from the oil inlet end 2011. At this time, the gap between the one-way valve core 410 and the spring seat 220 gradually decreases, and the hydraulic oil in the gap can flow out of the oil inlet 111 through the pressure relief channel 412 and the oil passage 213; when the pressure relief oil port ii is depressurized, the hydraulic oil at the oil inlet 111 can also flow to the gap between the one-way valve core 410 and the spring seat 220 through the oil passage 213 and the pressure relief channel 412 in sequence. This design can ensure that the pressure at both ends of the one-way valve core 410 remains balanced, and prevent the pressure change at the gap between the one-way valve core 410 and the spring seat 220 from affecting the timeliness of the pressure relief at the pressure reducing oil port ii.

[0069] Specifically, the pressure relief channel 412 includes a first channel 4121 and a second channel 4122 that are connected to each other. The first channel 4121 is arranged along the axial direction of the one-way valve core 410, and the second channel 4122 is arranged along the radial direction of the one-way valve core 410. The end of the first channel 4121 away from the second channel 4122 is connected to the gap between the one-way valve core 410 and the spring seat 220, and the end of the second channel 4122 away from the first channel 4121 is connected to the oil passage 213. By arranging the pressure relief channel 412 as the first channel 4121 and the second channel 4122 that are vertically connected, it is easy to process and improve the processing efficiency. Optionally, the number of the second channels 4122 is at least two, and at least two second channels 4122 are arranged at intervals along the circumference of the one-way valve core 410 to ensure that the hydraulic oil in the gap between the one-way valve core 410 and the spring seat 220 can flow out from the pressure relief channel 412 in time.

[0070] like Figure 3-Figure 5 As shown, in order to allow the hydraulic oil between the oil passage 213 and the oil inlet 111 to pass quickly, an annular oil passage groove 214 is further provided on the outer wall of the valve core body 210, and the oil passage groove 214 cooperates with the cavity wall of the valve cavity 1001 to form an oil passage gap 1002, and the oil passage gap 1002 is respectively connected to the oil passage 213 and the oil inlet 111. By providing the oil passage groove 214, the volume of the gap between the valve core body 210 and the cavity wall of the valve cavity 1001 can be increased to achieve the rapid passage of the hydraulic oil.

[0071] Fig.10 FIG. 2 shows a schematic cross-sectional view of the valve seat 110 provided in this embodiment. Fig.10 Combined with Figure 7 , Figure 8As shown, in order to prevent the pressure reducing valve core 200 from escaping from the valve cavity 1001 when switching between the connecting position and the blocking position, a first limiting portion 222 is provided at one end of the pressure reducing valve core 200 away from the oil inlet end 2011, and a second limiting portion 115 is provided on the cavity wall of the valve cavity 1001. The first limiting portion 222 can abut against the second limiting portion 115 to limit the maximum sliding distance of the pressure reducing valve core 200 in the valve cavity 1001. Specifically, in this embodiment, the first limiting portion 222 is a second annular protrusion provided on the outer periphery of the spring seat 220; the cavity wall portion of the valve cavity 1001 is convex inward to form a third annular protrusion, and the third annular protrusion faces the oil outlet 112 to form the above-mentioned first sealing port 113, and the step surface of the third annular protrusion facing away from the oil outlet 112 forms the second limiting portion 115, which has a simple structure and is easy to process.

[0072] Fig.11 Shows Figure 2 The second part of the structure diagram. Fig.11 Combined with Figure 2 As shown, the one-way pressure reducing valve also includes an elastic component 300, which includes an adjusting member 310 and a pressure regulating spring 320. The adjusting member 310 is at least partially adjustably connected to the valve cavity 1001; the pressure regulating spring 320 is arranged between the adjusting member 310 and the pressure reducing valve core 200 in a compressed state. By adjusting the position of the adjusting member 310 relative to the valve body 100, the compression amount of the pressure regulating spring 320 can be adjusted to change its preload. In this embodiment, the adjusting member 310 is threadedly connected to the valve sleeve 120, and the operator only needs a simple screwing action to realize the movement of the adjusting member 310 along its axial direction, which is convenient to operate.

[0073] Optionally, the valve body 100 (specifically, the valve seat 110) is further provided with an oil return port 114, one end of which is connected to the gap between the spring seat 220 and the adjusting member 310, and the other end of which is connected to the oil tank. When the pressure reducing valve core 200 is switched between the connecting position and the blocking position, the gap between the spring seat 220 and the adjusting member 310 changes accordingly. When the gap decreases, the hydraulic oil therein can flow from the oil return port 114 to the oil tank. When the gap increases, the hydraulic oil in the oil tank can flow from the oil return port 114 to the gap, thereby ensuring the pressure balance at both ends of the pressure regulating spring 320.

[0074] Fig.12 FIG. 3 is a schematic diagram showing the structure of the adjusting member 310 provided in this embodiment. Fig.12 Combined with Fig.11As shown, an installation groove 312 is provided at one end of the adjusting member 310 facing the pressure reducing valve core 200, and the pressure regulating spring 320 is partially installed in the installation groove 312 to achieve accurate positioning and installation of the pressure regulating spring 320, and can play a certain limiting role on the pressure regulating spring 320 to prevent it from expanding and contracting in a direction deviating from its own axis.

[0075] To avoid changes in the preload force of the pressure-regulating spring 320 due to misoperation, in this embodiment, the adjusting member 310 is completely located in the valve cavity 1001 to prevent other structures outside the valve body 100 from touching the adjusting member 310 and causing the preload force of the pressure-regulating spring 320 to be changed.

[0076] Optionally, the elastic component 300 further includes a limiter 330, and the two ends of the limiter 330 are respectively pressed against the outer wall of the adjusting member 310 and the cavity wall of the valve cavity 1001 to limit the relative position between the adjusting member 310 and the valve body 100. Specifically, a limiter groove 311 is provided on the outer wall of the adjusting member 310, and the limiter 330 is made of a wear-resistant and high-strength material. The limiter 330 is partially accommodated in the limiter groove 311, and one end of the limiter 330 exposed in the limiter groove 311 is pressed against the cavity wall of the valve cavity 1001, thereby realizing the limiting effect on the relative position between the adjusting member 310 and the valve body 100.

[0077] Continue as Figure 2 and Fig.11 As shown, the one-way pressure reducing valve further includes a plugging assembly 500, which is sealed and connected to one end of the valve cavity 1001 away from the pressure reducing valve core 200. By providing the plugging assembly 500, a double insurance function can be achieved, further preventing the preload force of the pressure regulating spring 320 from being changed due to misoperation. Specifically, the plugging assembly 500 includes a plug 510 and a plugging gasket 520, the plug 510 is threadedly connected to one end of the valve cavity 1001 away from the pressure reducing valve core 200, and a screwing groove 511 is provided at the outward end of the plug 510; the plugging gasket 520 is installed in the screwing groove 511. By providing the screwing groove 511 on the plug 510, it is convenient for the operator to insert a screwing tool into the screwing groove 511 to screw the plug 510, so that the plug 510 is threadedly connected with the valve body 100 (specifically, the valve sleeve 120); by installing the plugging gasket 520 in the screwing groove 511, it can play a protective role in closing the screwing groove 511, preventing the operator from mistakenly inserting other tools into the screwing groove 511 to screw the plug 510. Optionally, the plugging gasket 520 is interference-fitted in the screwing groove 511 to prevent the plugging gasket 520 from falling off during the operation of the one-way pressure reducing valve.

[0078] Optionally, a seal 600 is further provided between the plug 510 and the valve body 100 to prevent the hydraulic oil in the valve cavity 1001 from leaking from the gap between the plug 510 and the valve body 100. In the present embodiment, the seal 600 is a rubber seal ring, which has a good sealing effect, is easy to install, and has a low cost. To ensure the stable installation of the seal 600, in the present embodiment, a sealing groove 512 for installing the seal 600 is further provided on the outer wall of the plug 510 to prevent the seal 600 from falling off or shifting during the operation of the one-way pressure reducing valve. Of course, in other embodiments, the sealing groove 512 can also be provided on the cavity wall of the valve cavity 1001.

[0079] Optionally, a third limiting portion 513 is provided on the outer periphery of the plug 510, and when the third limiting portion 513 abuts against the end of the valve body 100 away from the oil outlet 112, the plug 510 and the adjusting member 310 are spaced apart along the axial direction of the valve body 100. With this arrangement, even if the blocking gasket 520 falls off from the sealing groove 512, and a screwing tool is inserted into the screwing groove 511 to screw the plug 510, the plug 510 will not drive the adjusting member 310 to move relative to the valve body 100, thereby further ensuring the accuracy of the preload force of the pressure regulating spring 320.

[0080] Combine the following Figure 1-Figure 12 Briefly describe the working principle of the one-way pressure reducing valve:

[0081] 1) Under normal working conditions, the one-way pressure reducing valve is a normally open valve, that is, the pressure reducing valve core 200 is in the connected position, and the hydraulic oil at the high-pressure oil port i can flow to the pressure reducing oil port ii through the oil inlet 111, the oil gap 1002, the gap between the first sealing port 113 and the pressure reducing valve core 200, and the oil outlet 112 in sequence, so as to supply oil for the load at the pressure reducing oil port ii. At this time, the effective action area acting on the pressure reducing valve core 200 is balanced with the preload force of the pressure regulating spring 320; it should be noted that in this process, since the oil inlet pressure of the high-pressure oil port i is always higher than the pressure reducing pressure of the pressure reducing oil port ii, the hydraulic oil at the high-pressure oil port i can simultaneously flow to the gap between the one-way valve core 410 and the spring seat 220 through the oil inlet 111, the oil gap 1002, the oil passage 213, and the pressure relief passage 412 in sequence, thereby ensuring that the one-way valve core 410 is always in the closed position, that is, the second conical surface 413 of the one-way valve core 410 seals the second sealing port 212.

[0082] 2) When the load at the pressure reducing oil port ii is less than the preload of the pressure regulating spring 320, the pressure reducing valve core 200 moves to the position where the interval between the first conical surface 211 and the first sealing port 113 is the largest, that is, the position where the first limiting portion 222 and the second limiting portion 115 are in contact with each other, so that the load at the pressure reducing oil port ii has the maximum movement speed.

[0083] 3) When the load at the pressure reducing oil port ii is equal to the preload of the pressure regulating spring 320, the pressure reducing valve core 200 starts to move in the direction of compressing the pressure regulating spring 320. At this time, the pressure reducing function of the one-way pressure reducing valve is turned on, and the pressure reducing valve core 200 and the pressure regulating spring 320 are in a dynamic equilibrium state.

[0084] 4) When the load at the pressure reducing oil port ii is greater than the preload of the pressure regulating spring 320, the pressure reducing valve core 200 moves to a position where the first conical surface 211 abuts against the first sealing port 113, that is, the pressure reducing valve core 200 is in a blocking position.

[0085] 5) When the oil inlet 111 is unloaded, if the pressure at the pressure reducing oil port ii is greater than the pressure at the oil inlet 111, the hydraulic oil at the pressure reducing oil port ii can push the one-way valve core 410 to move in the direction of the compression elastic member 420, so that the one-way valve core 410 is in the open position. At this time, the one-way function of the one-way pressure reducing valve is turned on.

[0086] Embodiment 2

[0087] This embodiment provides a one-way pressure reducing valve, the specific structure of which is substantially the same as that of the one-way pressure reducing valve provided in the first embodiment, except that the structure of the regulating member 310 is different.

[0088] refer to Figure 2 In this embodiment, the one-way pressure reducing valve does not include the blocking assembly 500 and the stopper 330, one end of the adjusting member 310 extends into the valve cavity 1001 and is threadedly connected thereto, and the other end of the adjusting member 310 is exposed outside the valve cavity 1001. In other words, the one-way pressure reducing valve provided in this embodiment is a structure in which the preload force of the pressure regulating spring 320 is adjustable, and the operator can adjust the preload force of the pressure regulating spring 320 according to actual use requirements, thereby ensuring the use performance of the one-way pressure reducing valve.

[0089] Embodiment 3

[0090] This embodiment provides a one-way pressure reducing valve, the specific structure of which is substantially the same as the specific structure of the one-way pressure reducing valve provided in the first embodiment, except that the structure of the blocking component 500 is different.

[0091] refer to Figure 2 In this embodiment, the plugging assembly 500 only includes the plug 510. That is, the operator can insert the screwing tool into the screwing groove 511 of the plug 510 to screw it, so as to remove the plug 510 from the valve body 100. At this time, the operator can adjust the preload force of the pressure regulating spring 320 by screwing the adjusting member 310.

[0092] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A one-way pressure reducing valve, characterized in that: include: A valve body (100), the valve body (100) comprising a valve cavity (1001), an oil inlet (111), an oil outlet (112), and a first sealing port (113) capable of communicating with the oil inlet (111) and the oil outlet (112), the oil inlet (111) being connected to a high-pressure oil port (i), and the oil outlet (112) being connected to a pressure-reducing oil port (ii); A pressure reducing valve core (200) is slidably disposed in the valve cavity (1001) and can be switched between a communication position away from the first sealing port (113) and a blocking position sealing the first sealing port (113); a first conical surface (211) is disposed on the outer wall of the pressure reducing valve core (200); when the pressure reducing valve core (200) is in the blocking position, a conical surface seal is formed between the first conical surface (211) and the first sealing port (113); a valve core cavity (201) is provided in the pressure reducing valve core (200), and an oil inlet end (2011) of the valve core cavity (201) is connected to the pressure reducing oil port (ii); and an oil passage (213) connected to the oil inlet port (111) is also disposed on the side wall of the pressure reducing valve core (200); A one-way component (400) is adjustably disposed in the valve core chamber (201), and the one-way component (400) can selectively open the passage between the oil inlet end (2011) and the oil passage (213), and only allows hydraulic oil to flow from the oil inlet end (2011) to the oil passage (213).

2. The one-way pressure reducing valve according to claim 1, characterized in that: A second sealing port (212) is also provided between the oil inlet end (2011) and the oil passage (213) to connect the two. The one-way assembly (400) comprises a one-way valve core (410) and an elastic member (420); the one-way valve core (410) is slidably disposed in the valve core cavity (201) to switch between an open position away from the second sealing port (212) and a closed position sealing the second sealing port (212); the elastic member (420) is in a compressed state and is used to move the one-way valve core (410) to the closed position of the second sealing port (212).

3. The one-way pressure reducing valve according to claim 2, characterized in that: A second conical surface (413) is provided on the outer wall of the one-way valve core (410), and when the one-way valve core (410) is in the closed position of the second sealing port (212), a conical surface seal is formed between the second conical surface (413) and the second sealing port (212).

4. The one-way pressure reducing valve according to claim 2, characterized in that: The pressure reducing valve core (200) comprises: A valve core body (210) is slidably disposed in the valve cavity (1001), the valve core cavity (201) being disposed through the valve core body (210) along the axial direction of the valve core body (210), and one end of the valve core cavity (201) is open to form the oil inlet end (2011); The spring seat (220) is connected to the other end opening of the valve core cavity (201), and the two ends of the elastic member (420) are pressed against the valve core body (210) and the spring seat (220) respectively.

5. The one-way pressure reducing valve according to claim 4, characterized in that: The spring seat (220) is provided with a first receiving groove (221) for receiving part of the elastic member (420); and / or the one-way valve core (410) is provided with a second receiving groove (411) for receiving part of the elastic member (420).

6. The one-way pressure reducing valve according to claim 4, characterized in that: A pressure relief channel (412) is provided in the one-way valve core (410), one end of the pressure relief channel (412) is connected to the gap between the one-way valve core (410) and the spring seat (220), and the other end of the pressure relief channel (412) is connected to the oil passage channel (213).

7. The one-way pressure reducing valve according to claim 1, characterized in that: A first limiting portion (222) is provided at one end of the pressure reducing valve core (200) away from the oil outlet (112), and a second limiting portion (115) is provided on the cavity wall of the valve cavity (1001), and the first limiting portion (222) can abut against the second limiting portion (115) to limit the maximum sliding distance of the pressure reducing valve core (200) in the valve cavity (1001).

8. The one-way pressure reducing valve according to any one of claims 1 to 7, characterized in that: The one-way pressure reducing valve further comprises an elastic component (300), wherein the elastic component (300) comprises: An adjusting member (310) is at least partially adjustably connected to the valve chamber (1001); The pressure regulating spring (320) is arranged in a compressed state between the regulating member (310) and the pressure reducing valve core (200).

9. The one-way pressure reducing valve according to claim 8, characterized in that: The regulating member (310) is completely located in the valve cavity (1001), and the one-way pressure reducing valve further comprises a plugging assembly (500), wherein the plugging assembly (500) comprises a plug (510) sealedly connected to an end of the valve body (100) away from the pressure reducing valve core (200).

10. The one-way pressure reducing valve according to claim 9, characterized in that: The plugging assembly (500) further comprises a plugging gasket (520), the plug (510) is threadedly connected to the valve body (100), and a screwing groove (511) is provided at an outward end of the plug (510), and the plugging gasket (520) is installed in the screwing groove (511).

11. The one-way pressure reducing valve according to claim 9, characterized in that: A third limiting portion (513) is provided on the outer periphery of the plug (510). When the third limiting portion (513) abuts against an end of the valve body (100) away from the oil outlet (112), the plug (510) and the regulating member (310) are spaced apart along the axial direction of the valve body (100).

12. The one-way pressure reducing valve according to claim 9, characterized in that: The regulating member (310) is completely located in the valve cavity (1001), and the elastic component (300) further includes a limiting member (330), and two ends of the limiting member (330) are respectively pressed against the outer wall of the regulating member (310) and the cavity wall of the valve cavity (1001).

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