Baffling pressure reduction single-seat control valve

Abstract

The utility model discloses a baffling pressure-reducing single-seat control valve which comprises a valve body, a valve seat part for closing and adjusting a circulation cavity of the valve body, a valve rod part arranged on the valve seat part and a valve cover arranged on the valve body, the bottom end of the valve rod part is connected with the valve seat, and the bottom end of the valve rod part is connected with the valve cover. The top end of the valve rod piece penetrates through the valve cover and is arranged outside the valve cover; the valve seat part comprises a valve seat, a pressing sleeve arranged on the valve seat, a plurality of baffling hole rings arranged in the pressing sleeve and a pressing plate arranged above the pressing sleeve, the upper portions of the baffling hole rings are connected with the pressing plate, and the lower edges of the baffling hole rings are arranged on the valve seat. By changing the number of the baffling hole rings and the number of the small holes formed in the baffling hole rings, flexible and variable permutation and combination are generated to form a pressure reduction and noise reduction structure suitable for different working conditions, and the purposes of reducing pressure difference and noise, prolonging the service life of a product and effectively recycling parts are achieved.

Description

Technical Field

[0001] The utility model relates to the production and application field of single-seat valves, in particular to a baffle and pressure-reducing single-seat control valve. Background Art

[0002] A single-seat valve is a common valve in the art. It primarily consists of a valve body, bonnet, valve core, valve stem, sleeve, valve seat, packing, and gaskets. The valve body has an inlet at one end and an outlet at the other. The valve core is guided by a guide sleeve, allowing it to move up and down within the sleeve.

[0003] The structure of this valve is outdated, especially when a fluid with a large pressure difference passes through the valve body, it has poor stability, large leakage and a relatively short service life.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes a baffle and pressure-reducing single-seat control valve to achieve the purpose of reducing pressure difference and noise, extending product service life, and effectively recycling parts.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0007] A single-seat control valve with a baffle and a pressure reduction function comprises a valve body, a valve seat for adjusting the closing of a flow cavity of the valve body, a valve stem disposed on the valve seat, and a valve cover disposed on the valve body, wherein the bottom end of the valve stem is connected to the valve seat, and the top end of the valve stem passes through the valve cover and is disposed outside the valve cover.

[0008] The valve seat component includes a valve seat, a pressing sleeve arranged on the valve seat, several deflection hole rings arranged in the pressing sleeve and a pressure plate arranged above the pressing sleeve, the upper part of the deflection hole ring is connected to the pressure plate, and the lower edge of the deflection hole ring is arranged on the valve seat; the deflection hole ring and the pressing sleeve are sequentially sleeved on the valve stem component, and several deflection holes are arranged on the side wall of the deflection hole ring, and the deflection holes on adjacent deflection hole rings are staggered and at different heights.

[0009] The utility model forms a pressure reduction and noise reduction structure suitable for different working conditions by changing the number of the deflecting hole ring and the small holes opened on the deflecting hole ring to produce flexible and changeable arrangements and combinations. The deflecting hole ring can divide the flow path in the valve into dozens to hundreds of small flows. When the fluid medium passes through the flow channel of the deflecting hole ring, it needs to flow out through many orderly arranged small holes and then increase the flow paths between the deflecting hole rings to perform layered pressure reduction, consume energy, and reduce the erosion of the fluid medium on the sealing surface inside the valve, so as to achieve the purposes of reducing pressure difference and noise, extending product service life, and effectively recycling parts.

[0010] Preferably, the pressure plate is provided with a through hole for the valve stem to pass through.

[0011] Preferably, a guide sleeve is provided above the pressure plate, which cooperates with the valve stem and guides the valve stem to move.

[0012] Preferably, the valve cover is mounted on the valve body by bolts, and the valve cover is also mounted on the guide sleeve, and a toothed pad is provided between the valve cover and the guide sleeve.

[0013] Preferably, a cylindrical cavity is provided in the middle of the valve cover for placing the middle and upper part of the valve stem, and a pad, a packing, and a packing gland are sequentially provided in the cylindrical cavity from bottom to top, and the top end of the valve stem passes through the middle of the pad, the packing, and the packing gland in sequence and is placed on the outside of the valve cover;

[0014] A packing gland nut matched with the packing gland is provided at the end of the columnar cavity, and the packing gland nut is threadedly connected to the outer wall of the columnar cavity.

[0015] Preferably, the outer side wall of the cylindrical cavity is provided with a round nut.

[0016] Preferably, a winding gasket is provided between the valve seat and the valve body.

[0017] The utility model has the following advantages:

[0018] 1. The utility model forms a pressure reduction and noise reduction structure suitable for different working conditions by changing the number of deflection hole rings and the small holes opened on the deflection hole rings to produce flexible and changeable arrangements and combinations. The deflection hole rings can divide the flow path in the valve into dozens to hundreds of small streams. When the fluid medium passes through the flow channel of the deflection hole ring, it needs to flow out through many orderly arranged small holes, and then increase the flow path between the deflection hole rings to perform layered pressure reduction, consume energy, and reduce the erosion of the fluid medium on the sealing surface inside the valve, so as to achieve the purpose of reducing pressure difference and noise, extending product service life, and effectively recycling parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0020] Figure 1 This is a structural schematic diagram of a baffle and pressure-reducing single-seat control valve disclosed in an embodiment of the utility model;

[0021] The numbers and letters in the figure represent the corresponding component names:

[0022] 1. Valve body 21. Valve seat 22. Gland 23. Baffle ring 231. Baffle hole 24. Pressure plate 3. Valve stem

[0023] 4. Valve cover 5. Guide sleeve 6. Toothed gasket 7. Cylindrical cavity 8. Spacer 9. Packing 10. Packing gland

[0024] 11. Packing gland nut 12. Round nut 13. Spiral wound gasket. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] The utility model provides a deflection and pressure-reducing single-seat control valve, the working principle of which is to form a pressure-reducing and noise-reducing structure suitable for different working conditions by changing the number of deflection hole rings and small holes opened on the deflection hole rings. The deflection hole rings can divide the flow path in the valve into dozens to hundreds of small flows. When the fluid medium passes through the flow channel of the deflection hole rings, it needs to flow out through many orderly arranged small holes, and then increase the flow paths between the deflection hole rings to perform layered pressure reduction, consume energy, and reduce the erosion of the fluid medium on the sealing surface inside the valve, so as to achieve the purposes of reducing pressure difference and noise, extending product service life, and effectively recycling parts.

[0027] The present invention will be further described in detail below with reference to the embodiments and specific implementation methods.

[0028] like Figure 1 As shown, a single-seat control valve with diverter and pressure reduction comprises a valve body 1, a valve seat member for adjusting the closing of a flow cavity of the valve body, a valve stem member 3 disposed on the valve seat member, and a valve cover 4 disposed on the valve body. The bottom end of the valve stem member is connected to the valve seat, and the top end of the valve stem member passes through the valve cover and is placed outside the valve cover.

[0029] The valve seat assembly includes a valve seat 21, a compression sleeve 22 disposed on the valve seat, several baffle rings 23 disposed within the compression sleeve, and a pressure plate 24 disposed above the compression sleeve. The upper portion of the baffle ring is connected to the pressure plate, and the lower edge of the baffle ring is disposed on the valve seat. The baffle ring and compression sleeve are sequentially sleeved onto the valve stem. Several baffle holes 231 are disposed on the sidewall of the baffle ring, and the baffle holes on adjacent baffle rings are staggered and located at different heights. The pressure plate is provided with a through hole for the valve stem to pass through.

[0030] A guide sleeve 5 is provided above the pressure plate to cooperate with the valve stem and guide the valve stem to move.

[0031] The valve cover is bolted to the valve body and also mounted on the guide sleeve. A toothed gasket 6 is provided between the valve cover and the guide sleeve. A cylindrical cavity 7 is provided in the middle of the valve cover for the upper and middle portion of the valve stem. Within this cylindrical cavity, a gasket 8, packing 9, and a packing gland 10 are positioned, from bottom to top. The top of the valve stem passes through the gasket, packing, and the middle of the packing gland, respectively, and is positioned on the outside of the valve cover. A packing gland nut 11, which mates with the packing gland, is provided at the end of the cylindrical cavity. The packing gland nut is threadedly connected to the outer wall of the cylindrical cavity. A round nut 12 is provided on the outer wall of the cylindrical cavity. A spiral wound gasket 13 is provided between the valve seat and the valve body.

[0032] The specific steps of using this utility model are as follows: Figure 1 As shown, the valve body 1 has a medium inlet at one end and a medium outlet at the other end, and its passage is S-shaped. The valve cover 4 is connected to the valve body via studs and nuts. The spiral wound gasket 13 is placed in the valve body, and the valve seat 21 is pressed onto the spiral wound gasket 3. The compression sleeve 22 and three deflection hole rings 23 are located on the valve seat 21 in sequence. The pressure plate 9 is pressed on the flow hole ring 1 6, the deflection hole ring 2 7, and the deflection hole ring 3 8. The valve cover 12 is connected to the valve body via studs, nuts, and toothed gasket 6. The valve stem 3 (the valve stem consists of a valve stem, a cylindrical pin, and a valve core. Its structure is the existing structure and is not described here) is located in the guide sleeve 5, above the valve seat 21. The valve stem 3 and the valve cover 4 are sealed with packing 9, and its upper end can be connected to a linear pneumatic actuator.

[0033] The valve stem 3 is guided by a guide sleeve 5 and, driven by a linear pneumatic actuator, can move linearly up and down within the valve body 1. As the valve core moves up and down, it changes the cross-sectional area of the fluid flow, achieving the function of regulating and controlling the fluid flow and pressure.

[0034] Based on the principle of increasing the number of dispersed medium flow channels and the distance the medium can flow, the compression sleeve 5 and three baffle rings 23 employ a rational flow diversion and range-extending structural design. The size, number, location, and arrangement of the through-holes are carefully and accurately simulated and calculated to achieve the desired effects of pressure reduction and noise reduction. The compression sleeve 5 and the three baffle rings 23 can be arranged in different combinations to suit different operating conditions. Proper spacing and arrangement of the small holes effectively control the flow rate of the medium, preventing sound waves from colliding before entering the small holes, dissipating energy and reducing fluid pressure, thereby achieving the goals of pressure reduction, noise reduction, and vibration resistance.

[0035] The baffle and pressure-reducing single-seat control valve provided by the utility model has the following advantages:

[0036] 1. Small size, light weight, few wearing parts, simple maintenance, easy processing, manufacturing, installation and disassembly.

[0037] 2. Developed and designed based on the principles of standardization, versatility, interchangeability, and flexibility. This product can be installed inside common control valves, featuring compact size, light weight, excellent interchangeability, and easy processing and manufacturing. A variety of pressure-reducing and noise-reducing internal components are available for the same specification. Simply replacing or adding or removing some components (such as compression sleeves and deflector rings) can meet diverse process requirements and enable effective component recycling.

[0038] 3. Advanced and reasonable structure, with unique baffled fluid channel, which makes the fluid depressurize in multiple directions and layers, controls the flow rate, reduces noise, resists erosion, cavitation and vibration.

[0039] 4. It is suitable for harsh working conditions with cavitation, flash evaporation, cavitation, vibration tendency, high pressure difference, high noise fluid control in the petroleum, chemical, metallurgy, power plant, natural gas and other industries. It can be used in combination with similar imported products from abroad, which is in line with the current national policy of encouraging the localization of industrial equipment.

[0040] The above is only a preferred embodiment of a deflection and pressure-reducing single-seat control valve disclosed in the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A single-seat control valve with deflection and pressure reduction, characterized in that: The valve comprises a valve body, a valve seat member for adjusting the closing of a flow cavity of the valve body, a valve stem member provided on the valve seat member, and a valve cover provided on the valve body, wherein the bottom end of the valve stem member is connected to the valve seat, and the top end of the valve stem member passes through the valve cover and is placed outside the valve cover; The valve seat component includes a valve seat, a pressing sleeve arranged on the valve seat, several deflection hole rings arranged in the pressing sleeve and a pressure plate arranged above the pressing sleeve, the upper part of the deflection hole ring is connected to the pressure plate, and the lower edge of the deflection hole ring is arranged on the valve seat; the deflection hole ring and the pressing sleeve are sequentially sleeved on the valve stem component, and several deflection holes are arranged on the side wall of the deflection hole ring, and the deflection holes on adjacent deflection hole rings are staggered and at different heights.

2. A baffle and pressure-reducing single-seat control valve according to claim 1, characterized in that: The pressure plate is provided with a through hole for the valve stem to pass through.

3. The baffle and pressure-reducing single-seat control valve according to claim 1, characterized in that: A guide sleeve is provided above the pressure plate and cooperates with the valve stem and guides the valve stem to move.

4. The baffle and pressure-reducing single-seat control valve according to claim 3, characterized in that: The valve cover is mounted on the valve body through bolts, and the valve cover is also mounted on the guide sleeve, and a toothed pad is provided between the valve cover and the guide sleeve.

5. The baffle and pressure-reducing single-seat control valve according to claim 1, characterized in that: A cylindrical cavity is provided in the middle of the valve cover for placing the middle and upper part of the valve stem, and a pad, a packing, and a packing gland are sequentially provided in the cylindrical cavity from bottom to top. The top end of the valve stem passes through the middle of the pad, the packing, and the packing gland in sequence and is placed on the outside of the valve cover; A packing gland nut matched with the packing gland is provided at the end of the columnar cavity, and the packing gland nut is threadedly connected to the outer wall of the columnar cavity.

6. The baffle and pressure-reducing single-seat control valve according to claim 5, characterized in that: A round nut is provided on the outer side wall of the columnar cavity.

7. The baffle and pressure-reducing single-seat control valve according to claim 1, characterized in that: A winding gasket is arranged between the valve seat and the valve body.

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