Low-temperature multi-stage pressure reduction and flow control sleeve type regulating valve

Abstract

The utility model relates to the technical field of sleeve type regulating valves, in particular to a low-temperature multi-stage pressure reduction flow control sleeve type regulating valve which comprises a valve seat installed in a valve body, a drainage sleeve, a throttling sleeve and a pressure reduction sleeve 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 installed at the top of the guide valve sleeve, a valve element is installed in the pressure reduction sleeve, and a valve rod slidably connected to the inner wall of the guide valve sleeve is installed at the top of the valve element. Fluid is preliminarily guided through the drainage sleeve, when the fluid passes through the throttling sleeve, strong turbulent flow and shearing action are generated, the pressure and the flow speed of the fluid are effectively reduced, the throttling effect is enhanced, efficient pressure reduction is achieved, then the disordered fluid is guided through the pressure reduction sleeve, and the disordered fluid can stably and smoothly enter the pressure reduction sleeve; and the three are matched to realize multi-stage pressure-reducing and flow-controlling discharge of the fluid.

Description

Technical Field

[0001] This utility model relates to the field of sleeve-type regulating valve technology, and in particular to a low-temperature 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 low-temperature 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 reduction effect by setting up 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 low-temperature 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 throttling sleeve and a pressure reducing sleeve sequentially fitted inside the valve seat along its central direction, a guide valve sleeve installed on the valve body, a drive mechanism installed on the top of the guide valve sleeve, a valve core installed inside the pressure reducing sleeve, and a valve stem slidably connected to the inner wall of the guide valve sleeve installed on the top of the valve core, 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 throttling 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 the pressure-reducing sleeve has multiple tapered holes arranged in an array, and the tapered holes have a structure that is wider on the outside and narrower on the inside.

[0009] A further improvement is that the valve body includes a valve body and a valve cover mounted on the valve body, with the inlet on the right side of the valve body and the outlet on the left side.

[0010] A further improvement is that the bottom center of the valve seat has a through hole structure that matches the valve core, and a flow control inlet hole is provided on the right side of the valve seat.

[0011] By employing the above technical solution, this utility model provides a low-temperature 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 to initially guide the fluid. When the fluid passes through the throttling sleeve, it generates strong turbulence and shearing, which effectively reduces the pressure and velocity of the fluid. Then, the pressure-reducing sleeve guides and combs the fluid out. The three work together to achieve multi-stage pressure reduction and flow control of the fluid.

[0013] 2. This utility model guides high-speed flowing fluid along a spiral guide groove to form a spiral flow path, thereby reducing the direct impact force of the fluid on the guide sleeve and reducing flow resistance. It initially guides and depressurizes the fluid, while increasing the heat dissipation area to effectively dissipate the heat generated by throttling and other processes, and maintains the normal operation of the valve under low-temperature conditions.

[0014] 3. The fluid guided by this utility model flows through the throttling sleeve, causing the fluid to form a complex flow field within the triangular hole opened on it, 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 own symmetry, can reduce local stress concentration, thereby improving the overall service life and reliability of the sleeve.

[0015] 4. This utility model guides turbulent fluid through a tapered orifice that is wider at the outside and narrower at the inside, allowing it to enter the pressure-reducing sleeve smoothly and steadily. The converging effect of the tapered orifice accelerates the flow, thereby improving the fluid transport efficiency. Attached Figure Description

[0016] The accompanying drawings, which are provided to further understand this application and constitute a 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 an independent schematic diagram of the multi-stage sleeve structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the independent structure of the throttling sleeve of this utility model;

[0022] Figure 5 This is a schematic diagram of the independent structure of the pressure-reducing sleeve of this utility model;

[0023] Figure 6 This is a cross-sectional view of the valve body of this utility model, viewed from below.

[0024] In the picture:

[0025] 1. Valve body; 11. Valve main body; 12. Valve cover; 13. Liquid inlet; 14. Liquid outlet;

[0026] 2. Valve seat;

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

[0028] 4. Throttling sleeve; 41. Triangular hole;

[0029] 5. Pressure reducing sleeve; 51. Tapered hole;

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

[0031] 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.

[0032] Example 1

[0033] Current technologies that rely solely on conical orifices for pressure reduction are ill-suited for transmission scenarios with frequent pressure changes. Furthermore, when fluid flow rates fluctuate significantly, relying solely on conical orifices can lead to substantial pressure fluctuations. Therefore, this embodiment provides a cryogenic multi-stage pressure-reducing and flow-controlling sleeve-type regulating valve. Please refer to [reference needed]. Figures 1-6This embodiment provides a low-temperature 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 low-temperature 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 throttling sleeve 4, and a pressure-reducing sleeve 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 pressure-reducing 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 system consists of a flow-guiding sleeve 3, a throttling sleeve 4, and a pressure-reducing sleeve 5 arranged sequentially. The flow-guiding sleeve 3 initially guides the fluid. When the fluid passes through the throttling sleeve 4, strong turbulence and shearing are generated, effectively reducing the fluid pressure and velocity. The pressure-reducing sleeve 5 then guides and discharges the fluid. The three components work together to achieve multi-stage pressure reduction and flow control for the fluid discharge. 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.

[0034] 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, initially guiding and reducing the pressure of the fluid, while increasing the heat dissipation area, effectively dissipating the heat generated by throttling, etc., and maintaining the normal operation of the valve under low temperature conditions.

[0035] The valve body 1 includes a valve body 11 and a valve cover 12 mounted on the valve body 11. The right side of the valve body 11 is the liquid inlet 13, and the left side is the liquid outlet 14.

[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 flow control inlet hole on the right side. Fluid is introduced into the valve body 11 through the inlet 13 and flows through the flow control inlet hole into the multi-stage sleeve for flow control and pressure reduction. 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. The depressurized fluid is then discharged into the outlet 14 through the through hole in the center of the valve seat 2, thereby realizing the flow control and multi-stage pressure reduction of the low-temperature fluid.

[0037] Example 2

[0038] The guided fluid still has a high pressure, therefore, based on Example 1, as... Figures 1-6As shown, the throttling 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 throttling 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 pressure reduction by the throttling sleeve 4 is relatively turbulent. Therefore, based on Example 2, as follows... Figures 1-6 As shown, the pressure reducing sleeve 5 in this device has multiple conical holes 51 arranged in an array, and the conical holes 51 have a structure that is wider on the outside and narrower on the inside. The fluid after pressure reduction flows through the conical holes 51 on the pressure reducing sleeve 5. The conical holes 51 with a wider outer diameter and a narrower inner diameter guide the turbulent fluid, allowing it to enter the interior of the pressure reducing sleeve 5 smoothly and steadily. Under the convergent effect of the conical holes 51, the flow is accelerated, thereby improving the fluid transport efficiency.

[0041] 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.

[0042] 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 low-temperature 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 throttling sleeve (4) and a pressure-reducing sleeve (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 inside the pressure-reducing 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 cryogenic 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 cryogenic multi-stage pressure reducing and flow controlling sleeve-type regulating valve according to claim 1, characterized in that: The throttling sleeve (4) has multiple sets of triangular holes (41) arranged in an array, and the two adjacent sets of triangular holes (41) are staggered and arranged vertically.

4. The cryogenic multi-stage pressure reducing and flow controlling sleeve-type regulating valve according to claim 1, characterized in that: The pressure-reducing sleeve (5) has multiple tapered holes (51) arranged in an array, and the tapered holes (51) have a structure that is wider on the outside and narrower on the inside.

5. A low-temperature multi-stage pressure reducing and flow controlling sleeve-type regulating valve according to claim 1, characterized in that: The valve body (1) includes a valve body (11) and a valve cover (12) installed on the valve body (11). The valve body (11) has an inlet (13) on its right side and an outlet (14) on its left side.

6. A cryogenic 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) has a through hole structure that is compatible with the valve core (8), and the right side of the valve seat (2) has a flow control inlet hole.

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