Threaded plug-in pressure reducing valve

Abstract

The utility model provides a threaded plug-in pressure reducing valve, and belongs to the technical field of pressure reducing valves. The valve sleeve is connected with the open end of the valve body, an oil inlet and an overflow port are formed in the valve sleeve, and the oil inlet and the overflow port are located in two different axial positions of the valve sleeve respectively; the valve element is installed in the valve sleeve in a sliding mode, the spring is connected with the valve element in an abutting mode, a blind-hole-shaped oil outlet hole is formed in one end of the valve element, the valve element is provided with a circle of circumferential face with a hole surrounding the outer side of the oil outlet hole, a side opening is formed in the wall, corresponding to the circumferential face with the hole, of the valve element, and the annular gap is communicated with the oil outlet hole through the side opening. The axial position of the valve core in the valve sleeve is determined by the pressure of a load end connected with the oil outlet hole; the threaded plug-in pressure reducing valve has the advantages that the threaded plug-in pressure reducing valve is mainly used for pressure adjustment in a secondary loop, it can be guaranteed that the pressure at the load end is kept stable, and the adjustment precision, sensitivity and reliability are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure reducing valves and relates to a threaded cartridge pressure reducing valve. Background Art

[0002] Hydraulic systems are widely used in modern industrial production and mechanical equipment due to their efficient and precise power transmission. These systems transmit power through a liquid medium, enabling complex tasks such as lifting, rotating, and pushing. However, in practical applications, strict pressure control within the hydraulic system is crucial to ensure stable operation and safety. Pressure reducing valves are essential components, particularly in applications where maintaining a specific operating pressure or limiting maximum pressure is crucial.

[0003] The threaded cartridge pressure reducing valve is a direct-acting slide valve, mainly used for pressure regulation in secondary circuits, especially in hydraulic systems that require stable load-end pressure. However, due to its structural design, the existing threaded cartridge pressure reducing valve still has much room for improvement in regulation accuracy, sensitivity and reliability. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems in the prior art and to propose a threaded cartridge pressure reducing valve.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a threaded cartridge pressure reducing valve, comprising:

[0006] A valve body, the valve body being of a cylindrical structure, wherein a spring is installed in the valve body;

[0007] A valve sleeve, the valve sleeve being a tubular structure, the valve sleeve being connected to the open end of the valve body, the valve sleeve being provided with an oil inlet and an overflow port, the oil inlet and the overflow port being respectively located at two different axial positions of the valve sleeve;

[0008] a valve core, the valve core being slidably mounted in the valve sleeve, the spring being in contact with the valve core, a blind-hole-shaped oil outlet opening being formed at one end of the valve core, the valve core having a perforated circumferential surface surrounding the outside of the oil outlet opening, an annular gap being formed between the perforated circumferential surface and the inner wall of the valve sleeve, a side opening being formed on the wall portion of the valve core corresponding to the perforated circumferential surface, the annular gap being in communication with the oil outlet opening via the side opening, and the axial position of the valve core in the valve sleeve being determined by the pressure at the load end connected to the oil outlet opening;

[0009] When the pressure of the load end connected to the oil outlet is within a predetermined range, the oil inlet is connected to the oil outlet through the annular gap, and the annular gap is isolated from the overflow port. The axial position of the valve core in the valve sleeve determines the size of the communication cross-section between the oil inlet and the annular gap.

[0010] When the pressure of the load end connected to the oil outlet hole exceeds a predetermined range, the annular gap is communicated with the overflow port, and the oil outlet hole is communicated with the overflow port through the side opening.

[0011] Preferably, the valve body has a spring cavity, the spring is installed in the spring cavity, the valve body is threadedly connected to an adjustment handle, one end of the spring is in contact with the adjustment handle, and the other end of the spring is in contact with the valve core.

[0012] Preferably, the valve core is provided with an oil drain hole, one end of the oil drain hole is communicated with the spring chamber and the other end is communicated with the overflow port.

[0013] Preferably, the outer peripheral surface of the valve core is in contact with the inner wall surface of the valve sleeve and a sealing ring is provided between the two.

[0014] Preferably, the oil inlet and the overflow port are both multiple in number and are arranged around the valve sleeve.

[0015] Preferably, the side openings are multiple and divided into at least two groups, and the side openings in each group are located at a different axial position of the valve core.

[0016] Preferably, when the pressure of the load end connected to the oil outlet exceeds a preset value, a partial outer peripheral surface of the valve core covers part or the entire oil inlet.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. A threaded cartridge pressure reducing valve is provided, which is mainly used for pressure regulation in the secondary circuit. It can ensure that the pressure at the load end remains stable and greatly improves the regulation accuracy, sensitivity and reliability.

[0019] 2. The spring preload actually determines the set working pressure of the pressure reducing valve. The design of the adjustment handle provides manual adjustment function, and the user can accurately adjust the working pressure of the pressure reducing valve according to actual needs.

[0020] 3. The drain hole is designed to prevent pressure buildup in the spring chamber. Once oil enters the spring chamber, it can be discharged through the drain hole to the overflow port. This allows the oil in the spring chamber to be promptly discharged, preventing pressure buildup in the spring chamber that could cause the valve core to malfunction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the internal structure of the threaded cartridge pressure reducing valve of the present utility model.

[0022] Figure 2 This is a partial structural diagram of the threaded cartridge pressure reducing valve of the present invention when the load end pressure is within a set range.

[0023] Figure 3 It is a partial structural diagram of the threaded cartridge pressure reducing valve of the present invention when the load end pressure exceeds the set range.

[0024] Figure 4 This is a structural diagram of the threaded cartridge pressure reducing valve of the present utility model.

[0025] Figure 5 This is a structural exploded view of the threaded cartridge pressure reducing valve of the present invention.

[0026] In the figure, 100, valve body; 110, spring; 120, spring chamber; 130, adjusting handle; 200, valve sleeve; 210, oil inlet; 220, overflow port; 230, annular gap; 300, valve core; 310, oil outlet hole; 320, side opening; 330, oil drain hole; 340, perforated circumferential surface. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] like Figure 1-5As shown, a threaded cartridge pressure reducing valve comprises: a valve body 100, the valve body 100 is a cylindrical structure, a spring 110 is installed in the valve body 100; a valve sleeve 200, the valve sleeve 200 is a tubular structure, the valve sleeve 200 is connected to the open end of the valve body 100, the valve sleeve 200 is provided with an oil inlet 210 and an overflow port 220, the oil inlet 210 and the overflow port 220 are respectively located at two different axial positions of the valve sleeve 200; a valve core 300, the valve core 300 is slidably installed in the valve sleeve 200, the spring 110 is in contact with the valve core 300, one end of the valve core 300 is provided with a blind hole-shaped oil outlet hole 310, the valve core 300 has a circle of perforated circumferential surface 340 surrounding the outer side of the oil outlet hole 310, an annular gap 230 is formed between the perforated circumferential surface 340 and the inner wall surface of the valve sleeve 200, and the valve core 300 A side opening 320 is formed in the wall portion corresponding to the perforated circumferential surface 340 . The annular gap 230 communicates with the oil outlet hole 310 through the side opening 320 . The axial position of the valve core 300 within the valve sleeve 200 is determined by the pressure at the load end connected to the oil outlet hole 310 . When the pressure at the load end connected to the oil outlet hole 310 is within a predetermined range, the oil inlet 210 communicates with the oil outlet hole 310 through the annular gap 230 , and the annular gap 230 is isolated from the overflow port 220 . The axial position of the valve core 300 within the valve sleeve 200 determines the cross-sectional area of the communication between the oil inlet 210 and the annular gap 230 . When the pressure at the load end connected to the oil outlet hole 310 exceeds the predetermined range, the annular gap 230 communicates with the overflow port 220 , thereby causing the oil outlet hole 310 to communicate with the overflow port 220 through the side opening 320 .

[0029] In this pressure reducing valve, the wall of the valve sleeve 200 has an oil inlet 210 and an overflow port 220. The valve core 300 has an oil inlet hole connected to the load end. This means that the pressure at the load end can be considered the pressure within the oil outlet hole 310. The spring 110 within the valve body 100 exerts an elastic force on the valve core 300. Under the action of the spring 110, the valve core 300 tends to fully open the oil inlet 210. It should be noted that throughout the entire operation, the valve core 300 is constantly adjusted axially within the valve sleeve 200.

[0030] During normal operation, the oil inlet 210 is connected to the annular gap 230, and the hydraulic oil can enter the annular gap 230 through the oil inlet 210, and then enter the oil outlet hole 310 through the side opening 320 and be delivered to the load end. At this time, the oil is allowed to flow in both directions between the oil inlet 210 and the oil outlet hole 310. When the pressure at the load end (the pressure at the oil outlet hole 310) suddenly increases (that is, when the pressure at the load end reaches a predetermined value), the pressure pushes the valve core 300 to overcome the elastic force of the spring 110 and move, so that the outer peripheral surface of the valve core 300 blocks part of the oil inlet 210, thereby limiting the oil inlet amount of the oil inlet 210. After the oil inlet amount of the oil inlet 210 is reduced, the pressure at the oil outlet hole 310 (load end) is reduced accordingly, thereby achieving a pressure reduction effect, and the movement stroke of the valve core 300 is determined by the pressure of the oil outlet hole 310. The greater the pressure of the oil outlet hole 310, the larger the area of the oil inlet 210 blocked and the smaller the oil outlet; when the pressure of the oil outlet hole 310 is relatively small, the spring 110 pushes the valve core 300 to move, thereby opening the oil inlet 210. At this time, the oil inlet amount increases, thereby increasing the pressure of the oil outlet hole 310. The above principle can maintain the pressure stability of the load end.

[0031] When the pressure at the load end (which can be regarded as the oil outlet hole 310) exceeds a predetermined range (i.e., exceeds a certain preset value), the valve core 300 moves to a certain position. At this time, the annular gap 230 is connected to the overflow port 220. At this time, the oil in the oil outlet hole 310 can overflow from the overflow port 220, and the excess pressure is released through the overflow port 220, thereby protecting the system from overpressure damage and playing a role in overpressure protection; when the load end pressure returns to the predetermined range, the valve core 300 is reset under the action of the spring 110.

[0032] This threaded cartridge pressure reducing valve offers high stability. The sliding design of the valve core 300 ensures that the load-side pressure remains stable, enhancing the stability of the hydraulic system. The axial position of the valve core 300 is determined by the load-side pressure, enabling precise pressure regulation. The valve core 300 exhibits a fast response speed, reacting quickly to changes in load-side pressure, ensuring safe system operation. This design is highly reliable and will not fail.

[0033] like Figure 1-3 、 Figure 5 As shown, based on the above embodiment, a spring cavity 120 is provided in the valve body 100, a spring 110 is installed in the spring cavity 120, an adjusting handle 130 is threadedly connected to the valve body 100, one end of the spring 110 is in contact with the adjusting handle 130, and the other end of the spring 110 is in contact with the valve core 300.

[0034] By rotating the adjustment handle 130, the preload force of spring 110 can be changed. Compressing spring 110 increases the preload force, while loosening it decreases it. The preload force of spring 110 effectively determines the set operating pressure of the pressure reducing valve. The design of the adjustment handle 130 provides manual adjustment, allowing the user to precisely adjust the operating pressure of the pressure reducing valve according to actual needs.

[0035] On the basis of the above embodiment, the valve core 300 is provided with an oil drain hole 330 , one end of the oil drain hole 330 is communicated with the spring chamber 120 and the other end thereof is communicated with the overflow port 220 .

[0036] The oil enters the valve sleeve 200 from the oil inlet 210 and reaches the oil outlet 310 through the annular gap 230. Since there may be tiny gaps between the valve sleeve 200 and the valve core 300, some oil may enter the spring chamber 120 along these gaps. The design of the oil drain hole 330 is to prevent pressure buildup in the spring chamber 120. After the oil enters the spring chamber 120, it can be discharged to the overflow port 220 through the oil drain hole 330. Through the oil drain hole 330, the oil in the spring chamber 120 can be discharged in time to avoid the pressure in the spring chamber 120 from increasing, which causes the valve core 300 to be unable to move normally. The design of the oil drain hole 330 ensures that the oil in the spring chamber 120 can be discharged smoothly, avoids pressure buildup, and ensures the normal movement of the valve core 300 and the stable operation of the pressure reducing valve.

[0037] Based on the above embodiment, the outer circumference of the valve core 300 is in contact with the inner wall of the valve sleeve 200, with a sealing ring disposed therebetween. The tight contact of the sealing ring ensures a tight seal when the valve core 300 slides within the valve sleeve 200, preventing hydraulic oil from leaking through the gap between the valve core 300 and the valve sleeve 200.

[0038] like Figure 1-5 As shown, based on the above embodiment, multiple oil inlets 210 and overflow ports 220 are provided, all arranged around the valve sleeve 200. The multiple oil inlets 210 are evenly distributed around the circumference of the valve sleeve 200, ensuring that hydraulic oil can enter the valve sleeve 200 evenly from multiple directions. The multiple overflow ports 220 are evenly distributed around the circumference of the valve sleeve 200, ensuring that excess hydraulic oil can be evenly discharged from multiple directions. The even distribution of the oil inlets 210 and overflow ports 220 ensures smoother flow of hydraulic oil within the valve sleeve 200, reducing local pressure fluctuations.

[0039] On the basis of the above embodiment, the number of the side openings 320 is multiple and is divided into at least two groups, and each group of side openings 320 is located at a different axial position of the valve core 300 .

[0040] Multiple side openings 320 are distributed at different axial positions, so that when the annular gap 230 is connected to the oil inlet 210, the oil can quickly and sensitively enter the oil outlet hole 310; and when the annular gap 230 is connected to the overflow port 220, the oil can very sensitively overflow from the overflow port 220. This design improves the response speed and adjustment accuracy of the valve core 300, ensuring that the valve core 300 can quickly and accurately adjust the pressure under different load conditions.

[0041] Based on the above embodiment, when the pressure at the load end connected to the oil outlet 310 exceeds a preset value, the outer circumference of the valve core 300 partially or entirely covers the oil inlet 210. It should be noted that the preset value is actually a value within a predetermined range, which is determined by the preload force provided by the spring 110. Once the pressure at the oil outlet 310 reaches the preset value, the outer circumference of the valve core 300 can sensitively control the amount of oil entering the oil inlet 210.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0045] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A threaded cartridge pressure reducing valve, characterized in that: include: A valve body (100), wherein the valve body (100) is a cylindrical structure, and a spring (110) is installed in the valve body (100); A valve sleeve (200), the valve sleeve (200) being a tubular structure, the valve sleeve (200) being connected to the open end of the valve body (100), the valve sleeve (200) being provided with an oil inlet (210) and an overflow port (220), the oil inlet (210) and the overflow port (220) being respectively located at two different axial positions of the valve sleeve (200); A valve core (300), the valve core (300) is slidably mounted in the valve sleeve (200), the spring (110) is in contact connection with the valve core (300), a blind hole-shaped oil outlet hole (310) is provided at one end of the valve core (300), the valve core (300) has a circle of perforated circumferential surface (340) surrounding the outside of the oil outlet hole (310), an annular gap (230) is formed between the perforated circumferential surface (340) and the inner wall surface of the valve sleeve (200), a side opening (320) is provided on the wall portion of the valve core (300) corresponding to the perforated circumferential surface (340), the annular gap (230) is communicated with the oil outlet hole (310) through the side opening (320), and the axial position of the valve core (300) in the valve sleeve (200) is determined by the pressure of the load end connected to the oil outlet hole (310); When the pressure of the load end connected to the oil outlet hole (310) is within a predetermined range, the oil inlet (210) is communicated with the oil outlet hole (310) through the annular gap (230), and the annular gap (230) is isolated from the overflow port (220), and the axial position of the valve core (300) in the valve sleeve (200) determines the size of the communicating cross section between the oil inlet (210) and the annular gap (230); When the pressure of the load end connected to the oil outlet hole (310) exceeds a predetermined range, the annular gap (230) is communicated with the overflow port (220), thereby allowing the oil outlet hole (310) to communicate with the overflow port (220) through the side opening (320).

2. A threaded cartridge pressure reducing valve according to claim 1, characterized in that: The valve body (100) has a spring cavity (120) therein, the spring (110) is installed in the spring cavity (120), the valve body (100) is threadedly connected to an adjustment handle (130), one end of the spring (110) is in contact with the adjustment handle (130), and the other end of the spring (110) is in contact with the valve core (300).

3. A threaded cartridge pressure reducing valve according to claim 2, characterized in that: The valve core (300) is provided with an oil drain hole (330), one end of the oil drain hole (330) is communicated with the spring chamber (120) and the other end is communicated with the overflow port (220).

4. A threaded cartridge pressure reducing valve according to claim 1 or 3, characterized in that: The outer peripheral surface of the valve core (300) is in contact with the inner wall surface of the valve sleeve (200), and a sealing ring is provided between the two.

5. The threaded cartridge pressure reducing valve according to claim 1, characterized in that: There are multiple oil inlets (210) and overflow ports (220), and both are arranged around the valve sleeve (200).

6. The threaded cartridge pressure reducing valve according to claim 1, characterized in that: The side openings (320) are multiple in number and are divided into at least two groups, and each group of the side openings (320) is located at a different axial position of the valve core (300).

7. The threaded cartridge pressure reducing valve according to claim 1, characterized in that: When the pressure of the load end connected to the oil outlet hole (310) exceeds a preset value, a partial outer peripheral surface of the valve core (300) covers part or all of the oil inlet (210).

Images