Up-down guide single-seat pressure and noise reduction regulating valve

Abstract

The up-down guide single-seat pressure and noise reduction regulating valve comprises an upper valve cover, a valve body, a valve element and a valve seat, the upper end of the valve element is in guide positioning with the upper valve cover through a guide sleeve, and the lower end of the valve element is in guide positioning with the valve seat through a guide hole; a pressure reducing channel communicated with the upper containing cavity and the lower containing cavity of the valve body is arranged in the valve seat, a medium flows through the pressure reducing channel from bottom to top, and the valve element body is driven by the valve rod to block or conduct the pressure reducing channel. A plurality of perforated plates are arranged in the pressure reducing channel of the valve seat from bottom to top, and pressure reducing holes are distributed in the perforated plates. The pressure-reducing and noise-reducing valve has good working condition adaptability and good pressure-reducing and noise-reducing performance, can effectively protect the valve element with high manufacturing cost, and has good economic and applicable value.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve design and manufacturing technical field, especially to a up and down guide single seat pressure reducing and noise reducing regulating valve. BACKGROUND

[0002] With the improvement of the level of science and technology, the scale of the industrial production fields such as petroleum chemical industry, coal chemical industry and natural gas liquefaction is expanding, and the process parameters are also increasing. In the control system, the severe working conditions such as high temperature, high pressure and high pressure difference frequently occur, which causes the old structure regulating valve to often have problems such as internal leakage, erosion of valve internals, high noise and poor regulation performance. At present, for high parameter working conditions, there are mainly multi-stage pressure reducing labyrinth disc structure, multi-stage series pressure reducing structure and multi-layer sleeve structure.

[0003] Although the multi-stage pressure reducing labyrinth disc structure has remarkable pressure reducing effect, its processing cost is too high, which is a burden for valve production enterprises.

[0004] The multi-stage series pressure reducing structure can allow large particle media to pass, but the pressure reducing series is limited.

[0005] The multi-layer sleeve structure is limited to the valve body structure, and is not applicable in many working conditions. INVENTION CONTENTS

[0006] The technical problem to be solved by the utility model is that in order to overcome the problems of high pressure difference, serious erosion, easy breakage of valve stem, high noise, poor regulation performance and easy internal leakage of the valve in the prior art, the utility model provides a up and down guide single seat pressure reducing and noise reducing regulating valve, which can effectively adapt to a certain degree of pressure and temperature change, not only has good working condition adaptability and good pressure reducing and noise reducing performance, but also can effectively protect the relatively high-cost valve core, and has good economic and applicable value.

[0007] The utility model discloses a technical scheme that solves its technical problem is adopted: a kind of up and down guide single seat pressure reducing noise reduction regulating valve, including upper valve cover, valve body, valve core and valve seat, the upper valve cover is arranged on the upper end of valve body, valve seat is arranged in valve body, the valve body is divided into upper cavity and lower cavity, wherein upper cavity is communicated with the outlet of valve body, the side wall of valve body has import, and import is communicated with lower cavity;The valve core includes valve core main body, valve rod and lower guide core, the valve rod is fixed on the upper end of valve core main body, and lower guide core is fixed on the lower end of valve core main body;Upper valve cover is provided with mounting hole, the valve rod is inserted into the upper cavity of valve body after penetrating mounting hole, the inner wall surface of the end portion of valve rod is concave in the inner wall surface of mounting hole, and annular groove is formed, the guide sleeve is arranged in annular groove, and the inner wall surface of guide sleeve is matched with valve rod;Valve seat is provided with pressure reducing channel, and the upper cavity and lower cavity of valve body are communicated, the flow direction of medium flowing through pressure reducing channel is from bottom to top, and the valve core main body is blocked or communicated under the driving of valve rod The pressure reducing channel;The pressure reducing channel of valve seat is spacedly provided with a plurality of perforated plates from bottom to top, and the pressure reducing holes are arranged on the perforated plates;Perforated plate is also provided with guide hole for lower guide core to penetrate.

[0008] In the installation and cooperation of the valve core, the guide sleeve is designed above the valve core for guiding, and the guide hole of the valve seat is used below the valve core for guiding. The up-and-down double-guiding structure can ensure that the valve core moves stably and accurately during opening and closing. In the design of the valve seat, the pressure is reduced twice. First, the medium enters from the side and flows through the pressure reducing channel from bottom to top. The change of the flow direction from side to vertical has the effect of reducing pressure and noise. Second, a plurality of perforated plates are designed in the valve seat. The perforated plates divide the medium fluid into many small flow beams. The concentrated total energy can be divided into many small energy units. Through multi-stage decomposition, the medium pressure is reduced, and the fluid speed is not too high, so the noise is reduced. At the same time, the pressure reducing and noise reducing structure also makes the main body of the medium flushing be the valve seat with low cost, instead of the valve core with high cost, which reduces the economic cost.

[0009] Further, in order to better guide the valve rod from above, the inner diameter of the mounting hole at the position above the annular groove is greater than the outer diameter of the valve rod, and the inner wall surface of the guide sleeve is clearance-fitted with the outer wall surface of the valve rod. The clearance is smaller than the clearance between the mounting hole above the annular groove and the valve rod. That is, by reducing the clearance between the guide sleeve and the valve rod at the position of the guide sleeve, the guide sleeve guides and centers the valve rod during the fitting process.

[0010] Further, the valve seat is provided with at least two perforated plates, and the positions of the pressure reducing holes on the adjacent two perforated plates are distributed in a staggered manner. The staggered distribution of the flow channel holes makes the medium fluid perform a flow splitting and decomposing operation once through each perforated plate, thereby improving the pressure reducing and noise reducing effect of the perforated plate.

[0011] Further, the valve seat corresponds to the outer circumferential surface between the lowermost two porous plates and is circumferentially distributed with a plurality of lateral holes, the lateral holes pass through the lower cavity and the pressure reduction channel in the valve seat, the lateral holes can pass into the medium on one hand, play the role of supplementing flow, on the other hand, can relieve the scouring of the medium to the valve seat to a certain extent, and protect the valve seat.

[0012] Further, the upper valve cover is provided with a sleeve between the valve seat, and the sleeve is provided with a flow channel hole on the circumferential cylinder wall. The flow channel hole designed on the sleeve provides a channel for the medium to flow out, facilitates the lateral flow of the medium from above the valve core body, and also performs a third-stage pressure reduction and noise reduction treatment on the medium.

[0013] The utility model discloses a beneficial effect is, the utility model discloses a kind of up and down guide single-seat pressure-reducing noise-reducing regulating valve, structure design is reasonable, in the connection of valve core and valve seat, sleeve, adopt upper and lower double guide structure, provide more accurate valve core movement guide for valve core movement, effectively enhance the centring between valve core and valve seat, can adapt to certain degree of pressure and temperature variation, with good working condition adaptability.In the design of valve seat, medium is gradually shunted from lower to upper through multistage hole, can effectively reduce medium pressure, and make fluid velocity not too high, noise is reduced. Meanwhile, the flow direction of medium from lower to upper, cause the scouring object of medium mainly for valve seat, thereby the valve core of higher cost is well protected, can effectively reduce the economic cost of use. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further described below in connection with drawings and examples.

[0015] Figure 1 It is the structure schematic diagram of the optimal embodiment of the utility model.

[0016] In the figure 1, upper valve cover 2, valve seat 3, lower cavity 4, valve body 5, lower guide core 6, guide hole 7, lateral hole 8, pressure reduction hole 9, sleeve 10, upper cavity 11, valve core body 12, guide sleeve 13, valve rod. DETAILED DESCRIPTION

[0017] The utility model is further described below in connection with drawings and examples.

[0018] As Figure 1The upper and lower guide single-seat pressure reducing and noise reducing regulating valve is the optimal embodiment of the utility model. The regulating valve comprises an upper valve cover 1, a valve body 4, a valve core and a valve seat 2. The upper valve cover 1 is arranged on the upper end of the valve body 4, the valve seat 2 is arranged in the valve body 4, the valve body 4 is divided into an upper cavity 10 and a lower cavity 3, the upper cavity 10 is communicated with the outlet of the valve body 4, the side wall of the valve body 4 is provided with an inlet communicated with the lower cavity 3. The valve core comprises an integrated valve core main body, a valve rod 13 and a lower guide core 5, the valve rod 13 is fixed on the upper end of the valve core main body, and the lower guide core 5 is fixed on the lower end of the valve core main body. The upper valve cover 1 is provided with a mounting hole, the valve rod 13 extends into the upper cavity 10 of the valve body 4 after penetrating through the mounting hole, and the upper end of the valve rod 13 is sealed from the upper valve cover 1 by using a packing gland.

[0019] The valve seat 2 is provided with a pressure reducing channel communicated with the upper cavity 10 and the lower cavity 3 of the valve body 4, the flow direction of the medium flowing through the pressure reducing channel is from the lower to the upper, and the valve core main body blocks or guides the pressure reducing channel under the driving of the valve rod 13.

[0020] In the embodiment, the valve core is provided with guide structures in the upper and lower parts respectively.

[0021] 1. The guide structure in the upper part of the valve core is the guide cooperation between the valve rod 13 and the upper valve cover 1. The mounting hole is provided with an annular groove in the inner concave surface of the end part of the valve rod 13 extending out, the annular groove is fixed with a guide sleeve 12, the inner diameter of the mounting hole corresponding to the position above the annular groove is larger than the outer diameter of the valve rod 13, the inner circumferential surface of the guide sleeve 12 is gap cooperated with the outer circumferential surface of the valve rod 13, the gap is an extremely small gap, which is smaller than the gap between the mounting hole above the annular groove and the valve rod 13. That is, the gap between the valve rod 13 and the upper segment of the mounting hole is larger than the extremely small gap between the valve rod 13 and the guide sleeve 12, through the gap difference, the guide sleeve 12 is contracted and guided, so that the guide centering operation of the valve rod 13 is realized.

[0022] 2. The guide structure in the lower part of the valve core is the guide cooperation between the lower guide core 5 and the valve seat 2. The porous plate in the valve seat 2 is provided with a guide hole 6 for the lower guide core 5 to penetrate through. In the process of the valve core main body being driven by the valve rod 13 to realize the blocking or guiding of the pressure reducing channel, the lower guide core 5 penetrates through the guide hole 6. The guide hole 6 provides the guide for the up and down movement of the lower guide core 5, so that the guide for the valve core in the lower part is provided.

[0023] The upper and lower double guide structures can provide more accurate guide for the movement of the valve core through the valve seat 2 and the guide sleeve 12, and ensure that the valve core is stable and accurate in the opening and closing process. It is helpful to reduce the deflection and jamming of the valve core and improve the operation reliability of the valve. The centering between the valve core and the valve seat 2 is enhanced, so that the sealing performance is improved. The design of the upper and lower guide provided in the embodiment makes the valve adapt to a certain degree of pressure and temperature change, the valve rod 13 is more reliable and durable, and has good working condition adaptability.

[0024] In the present embodiment, the valve seat 2 is specially designed so that the medium flow direction is reversed at the valve seat 2 and multi-stage pressure reduction and noise reduction are achieved.

[0025] Specifically, four dry porous plates are spaced and distributed from bottom to top in the pressure reduction channel of the valve seat 2, and a sleeve 9 is arranged between the upper valve cover 1 and the valve seat 2, and flow passage holes are formed in the circumferential wall of the sleeve 9.

[0026] In the present embodiment, the pressure reduction holes 8 on the adjacent two porous plates are distributed in a staggered manner, and the staggered distribution of the flow passage holes enables the medium fluid to be split and decomposed once when passing through each porous plate, thereby improving the pressure reduction and noise reduction effect of the porous plate. Meanwhile, in order to facilitate the medium to enter the pressure reduction channel, the diameter of the pressure reduction hole 8 of the lowermost porous plate is greater than that of the upper pressure reduction hole 8, and the pressure reduction hole 8 of the lowermost porous plate is also staggered with the pressure reduction hole 8 of the porous plate located above it.

[0027] The valve seat 2 is circumferentially distributed with a plurality of lateral holes 7 on the outer circumferential surface between the two lowermost porous plates, and the lateral holes 7 penetrate the lower cavity 3 and the pressure reduction channel in the valve seat 2. The lateral holes 7 can not only introduce the medium to supplement the flow, but also can alleviate the scouring of the medium on the valve seat 2 to a certain extent, thereby protecting the valve seat 2 and further reducing the economic cost of the valve seat 2 in use.

[0028] In this way, the medium flowing through the valve body 4 has the following flow direction: entering from the inlet of the lower cavity 3, most of the medium flowing from the lowermost pressure reduction hole 8 of the valve seat 2 from bottom to top, and a small part of the ring entering the pressure reduction channel from the lateral hole 7. The medium entering the pressure reduction channel flows from bottom to top, is dispersed and noise-reduced by the multi-stage porous plates, passes through the sleeve 9, and then flows out from the lateral of the upper cavity 10.

[0029] In this medium flow, the medium forms three-stage pressure reduction and noise reduction.

[0030] 1. The medium enters from the side and flows from the bottom of the valve seat 2 to the top of the pressure reduction channel, and the change of the flow direction from lateral to vertical has a pressure reduction and noise reduction effect.

[0031] 2. The multi-stage holes arranged on the valve seat 2 can split the fluid in the fluid inlet, divide the fluid into many small flow beams, decompose the concentrated single total energy into many small energy units, and reduce the medium pressure through multi-stage decomposition, so that the fluid velocity is not too high, and the noise is reduced. The staggered distribution of the multi-stage holes can further improve the pressure reduction and noise reduction effect.

[0032] 3. The flow passage holes designed on the sleeve 9 provide a passage for the medium to flow out, facilitate the medium to flow out from the top of the valve core body 11, and further reduce the pressure and noise of the medium.

[0033] In the structure design of the valve seat 2 reducing pressure and noise of the medium, the valve seat 2 is improved and extended, and a plurality of perforated plates are designed inside, the medium flow direction is changed, and the valve core is not directly washed. Therefore, when the medium pressure difference is too high, the first to be washed is the low-cost modified valve seat 2, not the valve core, so the valve core with high cost can be well protected. The medium for washing the valve core body 11 is the medium after double pressure reduction and noise reduction, and the pressure difference for washing the valve core body 11 is small, so the leakage is not easy to occur at the valve core position. The improved design of the valve seat 2 not only enables the system to operate stably, but also is more economical and environmentally friendly.

[0034] Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A single seat pressure reducing and noise reducing regulating valve with up and down guide, comprising an upper valve cover (1), a valve body (4), a valve core and a valve seat (2), the upper valve cover (1) is arranged on the upper end of the valve body (4), and the valve seat (2) is arranged in the valve body (4), characterized in that: The valve body (4) is divided into an upper cavity (10) and a lower cavity (3), wherein the upper cavity (10) is communicated with the outlet of the valve body (4), and the side wall of the valve body (4) has an inlet communicated with the lower cavity (3); the valve core comprises a valve core body, a valve rod (13) and a lower guide core (5), the valve rod (13) is fixed on the upper end of the valve core body, and the lower guide core (5) is fixed on the lower end of the valve core body; The upper valve cover (1) is provided with a mounting hole, the valve rod (13) penetrates the mounting hole and extends into the upper cavity (10) of the valve body (4), the mounting hole is concave on the inner circumferential surface of the end portion corresponding to the extension of the valve rod (13) and has an annular groove, a guide sleeve (12) is arranged in the annular groove, and the inner circumferential surface of the guide sleeve (12) is matched with the valve rod (13); The valve seat (2) has a pressure reduction channel communicated with the upper cavity (10) and the lower cavity (3) of the valve body (4), the medium flows from bottom to top through the pressure reduction channel, and the valve core body is driven by the valve rod (13) to block or guide the pressure reduction channel; A plurality of porous plates are distributed in the pressure reduction channel of the valve seat (2) from bottom to top; The porous plate is also provided with a guide hole (6) for the lower guide core (5) to penetrate through.

2. The up and down guide single seat pressure reducing and noise reducing control valve according to claim 1, characterized in that: The inner diameter of the mounting hole at the position above the annular groove is greater than the outer diameter of the valve rod (13), the inner circumferential surface of the guide sleeve (12) is matched with the outer circumferential surface of the valve rod (13) with a gap, and the gap is smaller than the gap between the mounting hole above the annular groove and the valve rod (13).

3. The single seat pressure reducing valve with noise reduction according to claim 1, characterized in that: The valve seat (2) is provided with at least two porous plates, and the positions of the pressure reduction holes (8) on the adjacent two porous plates are distributed in a staggered manner.

4. The up and down guide single seat pressure reducing and noise reducing control valve of claim 1, wherein: The valve seat (2) is provided with a plurality of lateral holes (7) distributed in a circumferential direction on the outer circumferential surface corresponding to the two porous plates at the lowermost end, and the lateral holes (7) penetrate the lower cavity (3) and the pressure reduction channel in the valve seat (2).

5. The single seat pressure reducing valve with noise reduction as claimed in claim 1, wherein: The sleeve (9) is arranged between the upper valve cover (1) and the valve seat (2), and the circumferential wall of the sleeve (9) is provided with a flow channel hole.

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