Multi-stage pressure reduction flow control sleeve type regulating valve

Abstract

The utility model relates to the technical field of sleeve type regulating valves, in particular to a multistage pressure reduction flow control sleeve type regulating valve which comprises a valve seat installed in a valve body, a drainage sleeve, a pressure reduction sleeve and a plurality of flow stabilization sleeves are sequentially sleeved in the valve seat in the center direction of the valve seat, and a guide valve sleeve is installed on the valve body. A driving mechanism is mounted at the top of the guide valve sleeve, a valve element is mounted in the innermost flow stabilizing sleeve, a valve rod slidably connected to the inner wall of the guide valve sleeve is mounted at the top of the valve element, and the driving mechanism drives the valve element to open or close the valve seat through the valve rod. Three-stage drainage pressure reduction and guiding carding discharge are conducted on fluid through the drainage sleeve, the pressure reduction sleeve and the flow stabilization sleeves, multi-stage pressure reduction flow control discharge of the fluid is achieved through cooperation of the drainage sleeve, the pressure reduction sleeve and the flow stabilization sleeves, pressure on the upper side and the lower side of the valve element is balanced through cooperation of the balance cavity, and therefore the stability of the valve element for fluid flow and pressure adjustment is improved.

Description

Technical Field

[0001] This utility model relates to the field of sleeve-type regulating valve technology, and in particular to a multi-stage pressure reducing and flow controlling sleeve-type regulating valve. Background Technology

[0002] For example, Chinese patent CN219082298U discloses a multi-stage sleeve-type noise reduction regulating valve. The medium enters the valve cavity through the medium inlet, and after noise reduction through the medium flow channel formed by the throttling holes on the multi-stage sleeves, it is discharged from the medium outlet. Since the multi-stage sleeves are fitted together in sequence, there are no gaps between the multi-stage sleeves. The medium only flows out from the medium flow channel and will not scour or erode the inner wall of the sleeve. Furthermore, after the medium flows out through the medium flow channel with reduced pressure and noise, it will not scour or erode the inner wall of the valve cavity, effectively extending the service life of the multi-stage sleeve-type noise reduction regulating valve.

[0003] The aforementioned regulating valve relies on the tapered orifice to change the flow area of ​​the medium to achieve pressure reduction. However, due to limitations such as the size and taper of the tapered orifice, it is difficult to achieve precise pressure control in transmission scenarios with frequent pressure changes. Furthermore, when there are significant changes in fluid flow rate, relying solely on the tapered orifice for pressure reduction may result in large pressure fluctuations. Moreover, when dealing with some high-viscosity fluids, the tapered orifice may cause excessive flow resistance, leading to a poorer pressure reduction effect. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve. This solves the technical problems of existing technologies that rely solely on conical orifices for pressure reduction, making it difficult to adapt to transmission scenarios with frequent pressure changes. Furthermore, when fluid flow fluctuates significantly, relying solely on conical orifices can lead to large pressure fluctuations. This invention achieves the goal of enhancing the pressure-reducing effect by incorporating a multi-stage pressure-reducing structure within the regulating valve.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a multi-stage pressure reducing and flow controlling sleeve type regulating valve, including a valve seat installed inside the valve body, a flow guiding sleeve, a pressure reducing sleeve and a plurality of flow stabilizing sleeves are sequentially fitted inside the valve seat along its central direction, a guide valve sleeve is installed on the valve body, a drive mechanism is installed on the top of the guide valve sleeve, a valve core is installed in the innermost flow stabilizing sleeve, and a valve stem is installed on the top of the valve core and slidably connected to the inner wall of the guide valve sleeve, and the drive mechanism drives the valve core to open or close the valve seat through the valve stem.

[0006] A further improvement is that the drainage sleeve includes a spiral guide groove on its outer side, and multiple liquid inlet holes are provided through the guide groove along its spiral line.

[0007] A further improvement is that the pressure-reducing sleeve has multiple sets of triangular holes arranged in an array, and the two adjacent sets of triangular holes are arranged in an alternating manner.

[0008] A further improvement is that multiple sets of drainage holes are arrayed on the flow stabilizing sleeve, and the drainage holes on adjacent flow stabilizing sleeves are arranged in an alternating manner to form a tortuous drainage channel.

[0009] A further improvement is that the top of the valve seat and the top wall of the valve body form a balance cavity, and a balance hole is provided in a ring shape through the valve core.

[0010] A further improvement is that the bottom center of the valve seat has a through hole structure adapted to the valve core, and a feed hole is provided on the side of the valve seat.

[0011] By employing the above technical solution, this utility model provides a multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve, which has at least the following beneficial effects:

[0012] 1. This utility model uses a flow-guiding sleeve, a pressure-reducing sleeve, and multiple flow-stabilizing sleeves to perform three-stage flow-guiding and pressure-reducing of the fluid and guide its discharge. The three work together to achieve multi-stage pressure reduction and flow control of the fluid. In addition, the balance chamber is used to balance the pressure on the upper and lower sides of the valve core, thereby improving the stability of the valve core in regulating the fluid flow and pressure.

[0013] 2. This utility model guides high-speed flowing fluid along a spiral flow path by using a spiral guide groove, thereby reducing the direct impact of the fluid on the guide sleeve and reducing flow resistance, thus initially guiding and depressurizing the fluid.

[0014] 3. This utility model uses a triangular hole on the pressure-reducing sleeve to create a complex flow field inside the fluid, generating strong turbulence and vortices, thereby enhancing the throttling effect, effectively reducing the pressure and velocity of the fluid, achieving efficient pressure reduction, and the triangular hole, due to its symmetry, can reduce local stress concentration, thereby improving the overall service life and reliability of the sleeve.

[0015] 4. This utility model guides the fluid through a tortuous flow channel, causing it to bend. During this process, the fluid pressure gradually decreases and the turbulent fluid is guided. A vortex is formed inside the innermost flow stabilizing sleeve, further reducing the fluid pressure and preventing the fluid from directly hitting the inner wall of the flow stabilizing sleeve, thus effectively extending the service life of the valve. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the internal structure of the valve body of this utility model;

[0020] Figure 3 This is a cross-sectional view of the valve body of this utility model, showing its independent internal structure.

[0021] Figure 4 This is a schematic diagram of the internal structure of the valve seat of this utility model, viewed in an independent cross-section.

[0022] Figure 5 This is a cross-sectional view of the internal structure of the valve seat and sleeve of this utility model;

[0023] Figure 6 This is a schematic diagram of the independent structure of the pressure-reducing sleeve of this utility model;

[0024] Figure 7 This is a schematic diagram of the independent structure of the flow stabilizing sleeve of this utility model;

[0025] Figure 8 This is a top-view structural diagram of the flow stabilizing sleeve of this utility model.

[0026] In the diagram: 1. Valve body; 2. Valve seat;

[0027] 3. Drainage sleeve; 31. Guide groove; 32. Liquid inlet hole;

[0028] 4. Pressure reducing sleeve; 41. Triangular hole;

[0029] 5. Flow stabilizing sleeve; 51. Drainage hole; 52. Tortuous drainage channel;

[0030] 6. Guide valve sleeve; 7. Drive mechanism; 8. Valve core; 9. Valve stem;

[0031] 101. Balancing chamber; 102. Balancing hole. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] Current technologies that rely solely on tapered orifices for pressure reduction are ill-suited for transmission scenarios with frequent pressure changes. Furthermore, when fluid flow fluctuates significantly, relying solely on tapered orifices leads to substantial pressure fluctuations. Therefore, this embodiment provides a multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve. Please refer to [reference needed]. Figures 1-8 This embodiment provides a multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve, which can enhance the pressure-reducing effect by setting a multi-stage pressure-reducing structure inside the regulating valve. This multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve includes a valve seat 2 installed inside a valve body 1. A flow-guiding sleeve 3, a pressure-reducing sleeve 4, and multiple flow-stabilizing sleeves 5 are sequentially fitted inside the valve seat 2 along its center direction. A guide valve sleeve 6 is installed on the valve body 1, and a drive mechanism 7 is installed on the top of the guide valve sleeve 6. A valve core 8 is installed inside the innermost flow-stabilizing sleeve 5, and a valve stem 9 is slidably connected to the inner wall of the guide valve sleeve 6 on the top of the valve core 8. The drive mechanism 7 drives the valve core 8 to open or close the valve seat 2 via the valve stem 9. When fluid enters the valve body 1, it flows through the valve seat 2. The sequentially arranged flow-guiding sleeve 3, pressure-reducing sleeve 4, and multiple flow-stabilizing sleeves 5 provide initial guidance of the fluid through the flow-guiding sleeve 3. When the fluid passes through the pressure-reducing sleeve 4, strong turbulence and shearing effects are generated, effectively reducing the fluid pressure and flow velocity. Then, the flow-stabilizing sleeves 5 further reduce the fluid pressure and guide it out. The three work together to achieve multi-stage pressure reduction and flow control for the fluid. Subsequently, the electric push rod in the drive mechanism 7 pulls the valve stem 9 up along the guide valve sleeve 6, thereby driving the valve core 8 up and allowing the fluid to flow out through the bottom of the valve seat 2.

[0035] Because the fluid velocity and pressure through the valve body 1 are too high, it is necessary to guide the fluid and initially reduce the pressure. Therefore, the flow guide sleeve 3 in this device includes a spiral guide groove 31 opened on its outer side, and multiple liquid inlet holes 32 are opened through the spiral line of the guide groove 31. The spiral guide groove 31 can guide the high-speed flowing fluid to form a spiral flow path along the guide groove 31 on the flow guide sleeve 3, thereby reducing the direct impact force of the fluid on the flow guide sleeve 3 and reducing the flow resistance, and initially guiding and reducing the pressure of the fluid.

[0036] The bottom center of the valve seat 2 has a through hole structure that matches the valve core 8. The valve seat 2 has a feed hole on its side. When the fluid enters the multi-stage sleeve inside the valve seat 2 through the inlet, the fluid is controlled and the pressure is reduced. Then, the drive mechanism 7 pulls the valve stem 9 to rise in the guide valve sleeve 6, which in turn drives the valve core 8 to rise and discharge the depressurized fluid through the through hole in the center of the valve seat 2.

[0037] Example 2

[0038] The guided fluid still has a high pressure, therefore, based on Example 2, as... Figures 1-8As shown, the pressure-reducing sleeve 4 in this device has multiple sets of triangular holes 41 arranged in an array, and two adjacent sets of triangular holes 41 are arranged in a staggered manner. When the guided fluid flows through the pressure-reducing sleeve 4, the fluid forms a complex flow field in the triangular holes 41, generating strong turbulence and vortices, thereby enhancing the throttling effect, effectively reducing the pressure and velocity of the fluid, and achieving efficient pressure reduction. Furthermore, the symmetry of the triangular holes 41 can reduce local stress concentration, thereby improving the overall service life and reliability of the sleeve.

[0039] Example 3

[0040] The fluid after being depressurized by the pressure-reducing sleeve 4 is relatively turbulent and still has a certain pressure. Therefore, based on Example 1, as... Figures 1-8 As shown, the device has multiple sets of drainage holes 51 arrayed on the flow stabilizing sleeve 5, and the drainage holes 51 on adjacent flow stabilizing sleeves 5 are staggered to form a tortuous drainage channel 52. After the fluid is guided and depressurized, it flows through the drainage holes 51 on the outer pressure reducing sleeve 4 and bends under the guidance of the tortuous drainage channel 52. During this process, the fluid pressure is gradually reduced and the turbulent fluid is guided. A vortex is formed inside the innermost flow stabilizing sleeve 5, which further reduces the fluid pressure and prevents the fluid from directly hitting the inner wall of the flow stabilizing sleeve 5, effectively extending the service life of the valve.

[0041] Example 4

[0042] To balance the fluid pressure at both ends of the valve core 8 and achieve pressure balance on both sides of the valve core 8, therefore, based on Embodiment 2, as follows: Figures 1-8 As shown, the top of the valve seat 2 and the top wall of the valve body 1 form a balance chamber 101 in the device. The valve core 8 has a balance hole 102 that runs through it in an annular shape. When the valve core 8 rises, the fluid is depressurized and controlled to flow. At this time, some of the fluid passes through the balance hole 102 on the valve core 8 and enters the balance chamber 101, which avoids the pressure difference between the upper and lower sides of the valve core 8 being too large and makes the pressure on the upper and lower sides of the valve core 8 tend to be consistent, thereby improving the stability of the valve core 8 in regulating the fluid flow and pressure.

[0043] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve, comprising a valve seat (2) installed inside the valve body (1), characterized in that: The valve seat (2) is fitted with a flow-guiding sleeve (3), a pressure-reducing sleeve (4) and multiple flow-stabilizing sleeves (5) in sequence along its center direction. A guide valve sleeve (6) is installed on the valve body (1). A drive mechanism (7) is installed on the top of the guide valve sleeve (6). A valve core (8) is installed in the innermost flow-stabilizing sleeve (5). A valve stem (9) is slidably connected to the inner wall of the guide valve sleeve (6) on the top of the valve core (8). The drive mechanism (7) drives the valve core (8) to open or close the valve seat (2) through the valve stem (9).

2. The multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve according to claim 1, characterized in that: The drainage sleeve (3) includes a spiral guide groove (31) opened on its outer side, and multiple liquid inlet holes (32) are opened through the guide groove (31) along its spiral line.

3. The multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve according to claim 1, characterized in that: The pressure relief sleeve (4) has multiple sets of triangular holes (41) arranged in an array, and the two sets of triangular holes (41) adjacent to each other are arranged in an alternating manner.

4. The multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve according to claim 1, characterized in that: The flow stabilizing sleeve (5) has multiple sets of drainage holes (51) arranged in an array, and the drainage holes (51) on adjacent flow stabilizing sleeves (5) are staggered to form a tortuous drainage channel (52).

5. A multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve according to claim 1, characterized in that: The top of the valve seat (2) and the top wall of the valve body (1) form a balance chamber (101), and the valve core (8) has a balance hole (102) that runs through it in an annular shape.

6. The multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve according to claim 1, characterized in that: The bottom center of the valve seat (2) is a through hole structure that is compatible with the valve core (8), and the side of the valve seat (2) is provided with a feed hole.

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