Sleeve type pressure reducing valve

Abstract

The utility model relates to the technical field of pressure reducing valves, in particular to a sleeve type pressure reducing valve, which comprises a valve body, a valve cover, a valve rod, a sleeve structure, a valve plug and an executing mechanism, the valve body is provided with a liquid inlet and a liquid outlet, the valve cover is fixedly arranged on the valve body, a cavity is arranged in the valve body, the sleeve structure is arranged in the cavity, and the valve plug is arranged in the cavity. The valve plug is installed in the cavity, the sleeve structure is provided with a through sliding groove, the valve plug is connected with the sliding groove in a sliding mode and used for adjusting the flowing path of a medium, the valve rod is fixedly connected to the valve plug and penetrates out of the valve cover, and the executing mechanism is connected with the valve rod. The utility model aims to reduce the scouring force to an inner sleeve and change the flowing path of a medium by optimizing the structure of a valve plug, so that the noise is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure reducing valve technical field especially relates to a sleeve type pressure reducing valve. BACKGROUND

[0002] The sleeve type pressure reducing valve is also called cage type valve, and it is a kind of high-efficiency and stable water pressure control equipment. It is widely applied to power plant, petrochemical, papermaking, heating, national defense and other industries. The sleeve type pressure reducing valve automatically adjusts the water outlet area by the up-down movement of valve plug relative to the internal sleeve, so as to realize the accurate control of water pressure. When the water inlet pressure rises, the valve plug moves down, reduces the water outlet area, and reduces the water outlet pressure. Conversely, when the water inlet pressure decreases, the valve plug moves up, increases the water outlet area, and increases the water outlet pressure. This automatic adjustment mechanism ensures the stable operation of water conservancy system.

[0003] At present, the sleeve type pressure reducing valve has a plurality of holes and grooves on the internal sleeve. When the valve plug changes the flow area of the hole and groove, especially when the flow area is small, the scouring intensity on the internal sleeve is stronger, which can easily damage the internal sleeve, thereby reducing the service life, and the noise is larger. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model aims at providing a sleeve type pressure reducing valve, which reduces the scouring intensity on the internal sleeve and changes the flow path of medium by optimizing the structure of valve plug, thereby reducing the noise.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] A sleeve type pressure reducing valve, including valve body, valve cover, valve rod, sleeve structure, valve plug and actuating mechanism, the valve body has liquid inlet and liquid outlet, the valve cover is fixedly arranged on the valve body, the valve body has cavity, the sleeve structure is installed in the cavity, the valve plug is installed in the cavity, the sleeve structure has through sliding slot, the valve plug is slidably connected with the sliding slot, and the flow path of medium is adjusted, the valve rod is fixedly connected on the valve plug and passes out the valve cover, and the actuating mechanism is connected with the valve rod.

[0007] On the basis of the above scheme, the present application also makes the following improvements:

[0008] Further, the cavity includes first cavity and second cavity, the liquid inlet is communicated with the first cavity, the first cavity and the second cavity are communicated, the first cavity and the second cavity have a step, the sleeve structure is arranged at the step, and the liquid outlet is communicated with the second cavity.

[0009] According to the above technical means, by setting the step between the first cavity and the second cavity, the sleeve structure is facilitated to be installed.

[0010] Further, the sleeve structure comprises a first sleeve and a second sleeve, the second sleeve is located inside the first sleeve, the first sleeve and the second sleeve are respectively provided with a plurality of first through holes and second through holes, and the sliding groove is located between the first sleeve and the second sleeve and separates the first sleeve and the second sleeve, used for adjusting the flow path of the medium.

[0011] According to the above technical means, by arranging the valve plug at the interval and the second sleeve, not only the flow path of the medium can be adjusted, but also the noise can be reduced, and the scouring strength of the second sleeve can be reduced.

[0012] Further, the first through holes and the second through holes are arranged in a staggered manner.

[0013] According to the above technical means, by arranging the first through holes and the second through holes in a staggered manner, the pressure of the medium can be adjusted, and the noise can be reduced to a certain extent.

[0014] Further, the first sleeve is connected between the cavity and the valve cover, and the second sleeve is fixedly connected in the cavity.

[0015] According to the above technical means, by arranging the first sleeve and the second sleeve separately, the installation of the valve plug is facilitated, and when replacement is required after long-term use, only the first sleeve or the second sleeve needs to be replaced, thereby reducing the replacement cost.

[0016] Further, the valve plug comprises a first plug body and a second plug body, one end of the valve rod is fixedly connected to the first plug body, the second plug body is fixedly connected to the outside of the first plug body, and the first plug body and the second plug body have a receiving groove therebetween, used for slidingly connecting with the sleeve structure.

[0017] According to the above technical means, by arranging the valve plug into the first plug body and the second plug body, and arranging the receiving groove between the first plug body and the second plug body, the second sleeve can be slidingly connected, the installation of the valve plug in the sleeve is facilitated, and the second sleeve can be provided with strength support.

[0018] Further, one end of the second plug body close to the liquid inlet is an inclined surface, and a rotary groove is arranged at the free end of the second plug body.

[0019] According to the above technical means, by arranging the rotary groove, the medium can be buffered, and the noise generated by the pressure and impact of the medium can be reduced.

[0020] Further, a plurality of expansion grooves are arranged in the rotary groove of the second plug body.

[0021] According to the above technical means, by arranging the expansion grooves, the buffering effect can be further improved.

[0022] Further, a plurality of balance holes are formed in the first plug body, and each of the balance holes has a Y-shaped cross section.

[0023] According to the above technical means, by setting the cross section of the balance hole as Y-shaped, the oscillation caused by the vortex and the impact can be improved, and the damage to the valve plug and the generated noise can be further reduced.

[0024] Further, a first sealing member is arranged between the valve body and the valve cover, and a second sealing member is arranged between the valve cover and the valve rod.

[0025] According to the above technical means, by arranging the first sealing member and the second sealing member, the sealing performance between the valve body and the valve cover can be improved.

[0026] The application adopting the above scheme has the following beneficial effects:

[0027] 1. In the application, by changing the cooperation mode of the valve plug and the sleeve structure, the scouring intensity of the medium on the sleeve structure can be reduced, thereby prolonging the service life of the sleeve, and the structure of the valve plug is adjusted, the flow path of the medium can be changed, and the noise generated during the flow of the medium through the pressure reducing valve can be reduced.

[0028] 2. In the application, by dividing the sleeve into two separate parts and cooperating with the misaligned through holes, the pressure of the medium can be adjusted, and the noise can be reduced to a certain extent; and by dividing into two separate parts, the cost can be reduced when damaged and replaced.

[0029] 3. In the application, by dividing the valve plug into a first plug body and a second plug body, and arranging a containing groove between the first plug body and the second plug body, the second sleeve can be slidably connected, the medium can be buffered, the pressure and impact of the medium can be reduced, the noise generated by the pressure and impact of the medium can be reduced, and the first sleeve and the second sleeve can be supported and strengthened to a certain extent, thereby prolonging the service life of the pressure reducing valve. BRIEF DESCRIPTION OF DRAWINGS

[0030] The utility model can be further illustrated by the non-limiting embodiments shown in the drawings;

[0031] Figure 1 is one of the structure schematic diagrams of the sleeve type pressure reducing valve in the embodiment of the application;

[0032] Figure 2 is the second structure schematic diagram of the sleeve type pressure reducing valve in the embodiment of the application;

[0033] Figure 3 is Figure 2 the enlarged structure schematic diagram of A in the embodiment of the application;

[0034] wherein,

[0035] 1, valve body; 11, inlet; 12, outlet; 13, first cavity; 14, second cavity; 2, valve cover; 21, first sealing element; 22, sealing ring; 23, second sealing element; 3, valve stem; 4, sleeve structure; 41, first sleeve; 411, first through hole; 42, second sleeve, 421, second through hole; 5, valve plug; 501, sliding groove; 51, first plug body; 511, balance hole; 52, second plug body; 521, rotary groove; 522, expansion groove. DETAILED DESCRIPTION

[0036] The advantages and effects of the present application can be understood by those skilled in the art from the disclosure of the specification. It should be noted that the drawings provided in the following examples are only used for illustrative purposes, and the drawings are only schematic drawings and not actual drawings, and should not be construed as limiting the present application. In order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product; for those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted.

[0037] In the drawings of the embodiments of the present application, the same or similar reference numerals correspond to the same or similar components. In the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, they are only used for the purpose of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. Therefore, the terms used to describe the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limiting the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances, and in the description of the present application, the terms "first", "second" and the like are only used for differentiation and should not be understood as indicating or implying relative importance.

[0038] It should be noted that the drawings provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and the drawings only show the components related to the present application, not the number, shape and size of the components during actual implementation. The actual implementation of each component may be arbitrarily changed in shape, number and proportion, and the layout pattern of the components may be more complex.

[0039] As Figures 1-3As shown, the sleeve type pressure reducing valve disclosed by the embodiment of the application comprises a valve body 1, a valve cover 2, a valve rod 3, a sleeve structure 4, a valve plug 5 and an actuator. The valve body 1 is provided with an inlet 11 and an outlet 12 for the entry and discharge of the medium. The valve cover 2 is fixedly arranged on the valve body 1 for sealing the valve body 1. The valve body 1 has a cavity, the sleeve structure 4 is installed in the cavity, and the valve plug 5 is installed in the cavity. The sleeve structure 4 has a through sliding groove 501, and the valve plug 5 is in sliding connection with the sliding groove 501, which is used to adjust the flow path of the medium, so as to reduce the scouring intensity of the medium and the noise generated in the flow process of the medium. The valve rod 3 is fixedly connected to the valve plug 5 and penetrates through the valve cover 2. The actuator is connected to the valve rod 3, which is used to control the position of the valve plug 5 relative to the sleeve structure 4, so as to adjust the pressure in the flow process of the medium.

[0040] In the embodiment, the actuator (not shown) is used to realize the functions of reducing, adjusting and stabilizing the pressure of the medium flowing through the pressure reducing valve. It can be spring type, pneumatic type and electric type, which is prior art and will not be described here.

[0041] In the embodiment, as shown in the figure, Figure 1 The valve cover 2 is fixedly installed on the upper part of the valve body 1 by bolts. The contact surface between the valve cover 2 and the valve body 1 is provided with a first sealing element 21 for sealing the connection. The valve body 1 is provided with a step, and the bottom of the valve cover 2 is fixedly connected with a ring platform. A sealing ring 22 is arranged between the ring platform and the step for sealing the connection. A second sealing element 23 is arranged between the valve cover 2 and the valve rod 3 for sealing the connection between the valve cover 2 and the valve rod 3. By arranging the first sealing element 21, the second sealing element 23 and the sealing ring 22, the sealing between the valve body 1 and the valve cover 2 is enhanced to avoid leakage.

[0042] In the embodiment, the first sealing element 21 and the second sealing element 23 can be rubber sealing pads, or can be silicone pads, graphite pads, etc. Appropriate sealing pads can also be selected according to actual conditions.

[0043] In the embodiment, as shown in the figure, Figure 1 The cavity comprises a first cavity 13 and a second cavity 14. The inlet 11 communicates with the first cavity 13, the first cavity 13 and the second cavity 14 communicate, and the outlet 12 communicates with the second cavity 14. The medium enters the first cavity 13 through the inlet 11, then passes through the sleeve structure 4 and the valve plug 5, then enters the second cavity 14, and finally is discharged from the outlet 12. The first cavity 13 and the second cavity 14 have a step, and the sleeve structure 4 is arranged at the step for installation of the sleeve structure 4.

[0044] In the embodiment, the sleeve structure 4 comprises a first sleeve 41 and a second sleeve 42. The second sleeve 42 is located inside the first sleeve 41, and the first sleeve 41 and the second sleeve 42 are respectively provided with a plurality of first through holes 411 and second through holes 421, which are arranged in a staggered manner. By arranging the first through holes 411 and the second through holes 421 in a staggered manner, the pressure of the medium can be adjusted, and the noise can be reduced to a certain extent. The sliding groove 501 is located between the first sleeve 41 and the second sleeve 42 and separates the first sleeve 41 and the second sleeve 42 into two separate parts. The valve plug 5 is slidingly arranged at the sliding groove 501 and the second sleeve 42 and is used to adjust the flow path of the medium.

[0045] In the embodiment, the first sleeve 41 is connected between the step and the ring platform, and is stably installed in the first cavity 13 by cooperation of the step and the ring platform. The second sleeve 42 is fixedly connected to the step by a long bolt. By arranging the first sleeve 41 and the second sleeve 42 separately, the installation of the valve plug 5 is facilitated, and the pressure reduction of the medium is not affected. When replacement is required after long-term use, only the first sleeve 41 or the second sleeve 42 needs to be replaced, thereby reducing the replacement cost.

[0046] In the embodiment, as shown in Figures 2-3 The valve plug 5 comprises a first plug body 51 and a second plug body 52. One end of the valve rod 3 is fixedly connected to the first plug body 51 by a nut, and the other end is connected to an actuator, so that the actuator can control the movement of the valve plug 5 through the valve rod 3. The second plug body 52 is fixedly connected to the outside of the first plug body 51, and the first plug body 51 and the second plug body 52 have a receiving groove therebetween, which is used to slidingly connect with the second sleeve 42. By dividing the valve plug 5 into the first plug body 51 and the second plug body 52 and arranging the receiving groove between the first plug body 51 and the second plug body 52, the valve plug 5 can be slidingly connected with the second sleeve 42, which facilitates the installation of the valve plug 5 in the sleeve and provides strength support for the second sleeve 42. In addition, the communication area of the first through holes 411 and the second through holes 421 can be controlled, thereby cooperating with the adjustment of the pressure of the medium.

[0047] In the embodiment, one end of the second plug body 52 close to the liquid inlet 11 is an inclined surface, which facilitates the entry of the medium. A rotation groove 521 is formed in the free end of the second plug body 52, which can buffer the medium and reduce the noise generated by the pressure and impact of the medium. A plurality of expansion grooves 522 are formed in the rotation groove 521 of the second plug body 52, which can further improve the buffering effect. In the embodiment, the expansion grooves 522 are annular, and can be arranged in two or three, or can be selected according to actual conditions.

[0048] In some embodiments, the inner surface and the outer surface of the second plug body 52 can be fixedly provided with steel brushes, and through the movement of the second plug body 52 closest to the first sleeve 41 and the second sleeve 42, the first through hole 411 and the second through hole 421 can be cleaned by the steel brushes, thereby reducing the plugging of the first sleeve 41 and the second sleeve 42 during long-term use.

[0049] In the embodiment, a plurality of balance holes 511 are formed on the first plug body, which can be 2, 3, 4, etc., and can also be selected according to actual conditions. The cross section of each balance hole 511 is Y-shaped, which can improve the oscillation caused by eddy current and impact, and further reduce the damage to the valve plug 5 and the noise generated.

[0050] In the embodiment, when the pressure difference before and after the pressure reducing valve is a certain value, the medium enters the first cavity 13 from the liquid inlet 11, is subjected to first pressure reduction through the first through hole 411, is subjected to second pressure reduction and noise reduction through the rotary groove 521 and the expansion groove 522, and is subjected to third pressure reduction through the second through hole 421, so as to achieve the purpose of pressure reduction and noise reduction.

[0051] The sleeve type pressure reducing valve provided by the application is described in detail above. The description of the specific embodiments is only used to help understand the method and its core idea of the application. It should be pointed out that for those skilled in the art, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

[0052] It should be pointed out that the phrases "one embodiment", "embodiment", "some optional embodiments", "exemplary embodiment", "some embodiments" and the like in the specification mean that the described embodiments can include a specific feature, structure or property, but not necessarily every embodiment includes the specific feature, structure or property. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or property is described in combination with an embodiment, it is within the knowledge of those skilled in the art to realize such feature, structure or property in combination with other embodiments described explicitly or implicitly.

[0053] The above embodiments are only used to illustrate the technical solutions of the utility model and not to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and they should all be covered in the claim scope of the utility model. The technical, shape and structure parts not described in detail in the utility model are all known technologies.

Claims

1. A sleeve type pressure reducing valve characterized by: The utility model provides a valve, including valve body (1), valve cover (2), valve stem (3), sleeve structure (4), valve plug (5) and actuating mechanism, the valve body (1) has liquid inlet (11) and liquid outlet (12) on, the valve cover (2) fixedly arranged on valve body (1), the valve body (1) has the cavity in, the sleeve structure (4) is installed in the cavity, the valve plug (5) is installed in the cavity, the sleeve structure (4) has through sliding slot (501), the valve plug (5) is slidably connected with sliding slot (501), is used for adjusting the flow path of medium, the valve stem (3) is fixedly connected on the valve plug (5), and goes out valve cover (2), and the actuating mechanism is connected with valve stem (3).

2. The sleeve type pressure reducing valve according to claim 1, characterized by: The cavity includes first cavity (13) and second cavity (14), the liquid inlet (11) is communicated with the first cavity (13), the first cavity (13) and the second cavity (14) are communicated, and the first cavity (13) has a step with the second cavity (14), the sleeve structure (4) is arranged at the step, and the liquid outlet (12) is communicated with the second cavity (14).

3. A cartridge pressure reducing valve according to claim 1 or 2, characterised in that: The sleeve structure (4) includes first sleeve (41) and second sleeve (42), the second sleeve (42) is located inside the first sleeve (41), the first sleeve (41) and the second sleeve (42) are provided with a plurality of first through hole (411) and second through hole (421) respectively, the sliding slot (501) is located between the first sleeve (41) and the second sleeve (42) and separates the first sleeve (41) and the second sleeve (42), and the valve plug (5) is slidably arranged at the sliding slot (501) and the second sleeve (42) and is used for adjusting the flow path of medium.

4. The nested pressure reducing valve of claim 3, wherein: The first through hole (411) and the second through hole (421) are arranged in a staggered manner.

5. The nested pressure reducing valve of claim 3, wherein: The first sleeve (41) is connected between the cavity and the valve cover (2), and the second sleeve (42) is fixedly connected in the cavity.

6. The nested pressure reducing valve of claim 1, wherein: The valve plug (5) includes a first plug body (51) and a second plug body (52), one end of the valve stem (3) is fixedly connected to the first plug body (51), the second plug body (52) is fixedly connected to the outside of the first plug body (51), and the first plug body (51) and the second plug body (52) have a receiving groove therebetween, which is used for slidably connecting with the sleeve structure (4).

7. The nested pressure reducing valve of claim 6, wherein: The second plug body (52) is inclined at one end close to the liquid inlet (11), and a rotary groove (521) is formed in the free end of the second plug body (52).

8. The nested pressure reducing valve of claim 7, wherein: A plurality of expansion grooves (522) are formed in the rotary groove (521) of the second plug body (52).

9. The nested pressure reducing valve of claim 6, wherein: A plurality of balance holes (511) are formed in the first plug body (51), and each balance hole (511) has a Y-shaped cross section.

10. The cartridge pressure reducing valve of claim 1, wherein: A first sealing member (21) is arranged between the valve body (1) and the valve cover (2), and a second sealing member (23) is arranged between the valve cover (2) and the valve stem (3).

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