Regulating valve of integrated structure

Abstract

The utility model relates to the field of valves, in particular to a regulating valve with an integrated structure, which comprises a valve body, a valve clack part and a valve rod part, the lower end of the valve rod part penetrates through the valve body and extends to the upper end of the valve clack part, and the valve rod part and the valve clack part are integrally formed to form a rigid whole; according to the utility model, the valve rod part and the valve clack part are constructed into an integrally formed rigid integral part, and a traditional separated structure is replaced, so that a connecting interface between the valve rod part and the valve clack part is eliminated; the inherent risks of looseness, excessive abrasion, strength reduction and even fracture separation possibly caused by factors such as high-frequency action, vibration, medium corrosion or stress concentration of a connecting part in the prior art are overcome; therefore, the structural strength, the operation stability and the long-term reliability of the regulating valve under harsh working conditions (such as high-frequency, high-pressure-difference, high-temperature and corrosive environments) are remarkably improved, and the potential leakage and failure probability is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the valve field, concretely relates to a regulating valve of integrated structure. BACKGROUND

[0002] The regulating valve is an important component in the industrial automatic process control system, and is used for adjusting the flow, pressure, temperature and other parameters of fluid medium in the pipeline. The regulating valve usually relies on the valve rod to transmit driving force, drives the valve clack to move to change the flow area of the valve port, so that the adjusting function is realized. The valve rod and the valve clack are the core movable parts.

[0003] In the existing regulating valve design, in order to facilitate processing and assembly, the valve rod and the valve clack often adopt a split structure, and the two are assembled into a whole through threads, pins or other connecting pieces. However, in the long-term use process, especially in the harsh working condition environment of high frequency action, high pressure difference, high temperature, strong corrosion, etc., the connecting part of the split connecting structure may become a weak point. Frequent stress, vibration, medium corrosion and wear and other factors may cause the connecting part to loosen, the fitting gap to increase, and even the connecting strength to decrease or break, thereby possibly causing the valve leakage, the adjusting characteristic change, the unstable operation and other problems, affecting the performance and service life of the regulating valve, and even possibly causing hidden troubles to the safe and reliable operation of the whole process system. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses in order to solve the above-mentioned technical problem, the purpose is to provide a regulating valve of integrated structure, eliminates the physical connection interface existing in traditional split type connection, overcomes the inherent risk of loosening, excessive wear, strength decrease and even fracture separation of the connecting part in the prior art due to high frequency action, vibration, medium corrosion or stress concentration and other factors.

[0005] The utility model discloses the following technical scheme realizes:

[0006] A regulating valve of integrated structure, comprising a valve body, a valve clack part and a valve rod part, a medium inlet flow channel, a medium outlet flow channel and a valve cage are arranged in the valve body, the valve cage is arranged in the valve body, the lower end of the valve cage is sealingly connected with the medium outlet flow channel, the upper end of the valve cage is sealingly connected with the inner wall of the valve body, the side wall of the valve cage is arranged in the medium inlet flow channel, and a plurality of flow regulating holes are arranged in the lower section of the valve cage, the valve clack part is arranged in the valve cage, and the outer side surface of the valve clack part is sealingly connected with the inner side surface of the valve cage.

[0007] The lower end of the valve rod part extends to the upper end of the valve clack part through the valve body, and the valve rod part and the valve clack part are integrally formed to form a rigid whole.

[0008] Optionally, the valve clack part is a cylindrical structure, and an outer side surface of the valve clack part is in dynamic sealing contact with an inner side surface of the valve cage.

[0009] The valve stem part comprises a stem body and a connecting block, a lower end of the stem body is connected to an upper end surface of the connecting block, the connecting block is arranged inside an upper end of the valve clack part, and an outer side surface of the connecting block is connected to an inner side surface of the valve clack part.

[0010] The valve clack part, the stem body and the connecting block are integrally formed.

[0011] Optionally, a plurality of pressure balance holes are arranged on the connecting block and pass through the upper end surface and the lower end surface of the connecting block.

[0012] Optionally, the valve clack part and the valve stem part are made of corrosion-resistant alloy steel or stainless steel, and outer surfaces of the valve clack part and the valve stem part are subjected to chrome plating or nitriding treatment.

[0013] Further, an upwardly-extending flow guide table is arranged on the upper end surface of the connecting block, an outer side surface of the flow guide table is in dynamic sealing contact with an inner side surface of the valve cage, an upper end surface of the flow guide table is provided with an annular triangular inverted groove, and a bottom surface of the annular triangular inverted groove is provided with flow guide holes communicating with upper ends of the pressure balance holes.

[0014] The flow guide table is integrally formed with the stem body and the connecting block.

[0015] Optionally, triangular protrusions are arranged between adjacent two flow guide holes.

[0016] Optionally, an upper outer circular edge of the annular triangular inverted groove is connected to an outer circumferential surface of the flow guide table, and an upper inner circular edge of the annular triangular inverted groove is connected to an outer circumferential surface of the stem body.

[0017] Further, lower ends of the pressure balance holes are connected to an inner side surface of the valve clack part, a downwardly-extending inverted conical table is arranged on a lower end surface of the connecting block, a conical surface of the inverted conical table is provided with a plurality of arc-shaped grooves, and upper arc-shaped edges of the arc-shaped grooves are connected to a circumferential surface of the pressure balance holes.

[0018] The inverted conical table is integrally formed with the connecting block.

[0019] Optionally, an upper circumferential edge of the inverted conical table is connected to an inner side surface of the valve clack part, and a maximum radius of the arc-shaped grooves is equal to a radius of the pressure balance holes.

[0020] Optionally, the radii of the arc-shaped grooves gradually increase from bottom to top along the inverted conical table.

[0021] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0022] The utility model discloses a valve stem part and valve clapper part are constructed into the rigid whole component of integral molding, replace the traditional separate structure, thereby eliminate the connecting interface between both, overcome the inherent risk of loose, excessive wear, strength decline and even fracture separation of connecting part in prior art possibly caused by high frequency action, vibration, medium corrosion or stress concentration and the like, thereby significantly improve the structural strength, operation stability and long-term reliability of regulating valve under severe working conditions (such as high frequency, high pressure difference, high temperature, corrosion environment), reduce the potential leakage and failure probability. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings illustrate exemplary embodiments of the present utility model and together with the general description given above, and the detailed description below, serve to explain the principles of the present utility model. These drawings are included to provide a further understanding of the present utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the present utility model and, together with the description, serve to explain the principles of the present utility model.

[0024] Figure 1 is a structural schematic view of a regulating valve of an integral structure according to the present utility model.

[0025] Figure 2 is a structural schematic view of a valve stem part and valve clapper part according to the present utility model.

[0026] Figure 3 is a position schematic view of a flow guide platform and inverted cone platform according to the present utility model.

[0027] Figure 4 is a structural schematic view of an inverted cone platform according to the present utility model.

[0028] Reference signs: 1-valve body, 11-medium inlet flow channel, 12-medium outlet flow channel, 2-valve stem part, 21-connection block, 3-valve clapper part, 4-pressure balance hole, 5-flow guide platform, 51-annular triangular inverted groove, 52-flow guide hole, 6-inverted cone platform, 61-arc-shaped recess. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present utility model more clear and intelligible, the present utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the related content, and not limit the present utility model.

[0030] In addition, it also needs to be explained that, in order to facilitate the description, only the parts related to the present utility model are shown in the drawings.

[0031] In this application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" should be construed as broad terms, for example, can be fixed connection, can also be detachable connection, or integrated; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] In this application, unless specifically defined otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] The embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0034] Embodiment one

[0035] The working mode of the regulating valve is that: the external driving force is transmitted to the valve disc part 3 through the valve rod part 2, so that the valve disc part 3 moves up and down in the valve cage, changes the relative position between the valve disc part 3 and the flow regulating hole on the valve cage, and adjusts the fluid flow through the valve.

[0036] As shown in Figure 1 and Figure 2 , a regulating valve with an integrated structure is provided, which comprises a valve body 1, a valve disc part 3 and a valve rod part 2.

[0037] The valve body 1 is provided with a medium inlet flow channel 11, a medium outlet flow channel 12 and a valve cage. The valve cage is arranged in the valve body 1, the lower end of the valve cage is sealingly connected with the medium outlet flow channel 12, the upper end of the valve cage is sealingly connected with the inner wall of the valve body 1, the side wall of the valve cage is arranged in the medium inlet flow channel 11, and the lower section of the valve cage is provided with a plurality of flow regulating holes.

[0038] The valve clack 3 is arranged in the valve cage, and the outer side surface of the valve clack 3 is in dynamic sealing connection with the inner side surface of the valve cage; the valve clack 3 directly controls the flow passage area, is located in the valve cage, and the valve cage guides the up-down movement of the valve clack 3, and the two cooperating surfaces have a sealing effect, preventing the medium from leaking without passing through the throttling area, that is, the medium can only flow into the valve cage from the flow regulating hole and then flow to the medium outlet flow channel 12.

[0039] The lower end of the valve stem 2 extends to the upper end of the valve clack 3 through the valve body 1, and the valve stem 2 and the valve clack 3 are integrally formed to form a rigid whole. The valve stem 2 and the valve clack 3 are not two independent components assembled together, but are integrally formed (manufactured into a single component without internal joints by casting, forging, integral machining and the like) to form a rigid whole. After the lower end of the valve stem passes through the valve body 1, it is directly and seamlessly integrated with the valve clack 3 below. This design fundamentally eliminates the risk of loosening, wear or breakage at the connection between the valve stem and the valve clack in the traditional structure.

[0040] The embodiment also provides several optional detailed design schemes.

[0041] The valve clack 3 is in the form of a cylinder, and the outer side surface of the valve clack 3 is in dynamic sealing contact with the inner side surface of the valve cage; the valve clack 3 is arranged in the form of a cylinder, which can reduce the mass of the valve clack 3, reduce the inertial impact of the external driving force, and save materials.

[0042] The valve stem 2 includes a stem body and a connecting block 21, the lower end of the stem body is connected to the upper end surface of the connecting block 21, the connecting block 21 is arranged inside the upper end of the valve clack 3, and the outer side surface of the connecting block 21 is connected to the inner side surface of the valve clack 3; the valve clack 3, the stem body and the connecting block 21 are integrally formed, that is, the connecting block 21 is part of the whole, which is used to realize the structural transition and connection of the stem body to the cylindrical valve clack.

[0043] The connecting block 21 is provided with a plurality of pressure balance holes 4 penetrating through the upper end surface and the lower end surface thereof, the pressure balance holes 4 are used to communicate the fluid pressures of the space above and below the valve clack, so as to reduce the unbalanced force acting on the valve clack, so that when the valve clack 3 moves up and down, the space above the valve clack 3 and the valve body 1 will not become a sealed cavity.

[0044] The valve clack 3 and the valve stem 2 are made of high-strength, corrosion-resistant alloy steel or stainless steel, and the outer surfaces of the valve clack 3 and the valve stem 2 are subjected to chrome plating or nitriding treatment.

[0045] Embodiment Two

[0046] As Figure 3As shown, this embodiment is a further structural optimization based on the integrated valve stem and valve disc structure of Embodiment 1. The purpose is to provide guide structures above and below the connecting block 21 so that the fluid medium that needs to be exchanged through the pressure balance hole 4 can flow more quickly and smoothly when the valve disc part 3 makes rapid up and down adjustment movements, thereby effectively avoiding or mitigating the possible hydraulic shock phenomenon, protecting the valve internals and improving operational stability.

[0047] The upper end face of the connecting block 21 is provided with an upwardly extending guide platform 5. The outer side of the guide platform 5 is dynamically sealed to the inner side of the valve cage. The guide platform 5 is not an independent component, but a specific geometric shape formed by the three parts of the integrated valve stem and valve disc in the area above the connecting block 21. The guide platform 5 is coaxially surrounded by the valve stem body. The outer circumferential side of the guide platform 5 is dynamically sealed to the inner side of the valve cage. That is, the guide platform 5 undertakes part or main of the upper guiding function here and cooperates with the valve cage to achieve dynamic sealing.

[0048] The upper surface of the flow guide platform 5 is provided with an annular triangular groove 51, and the bottom surface of the annular triangular groove 51 is provided with a flow guide hole 52 that connects to the upper end of the pressure balance hole 4; the flow guide platform 5 is integrally formed with the rod body and the connecting block 21.

[0049] The combined action of the guide platform 5, the annular groove, and the guide hole 52 provides a guiding channel for fluid exchange at the upper end of the pressure balance hole 4. When the valve disc 3 moves rapidly and fluid needs to enter the pressure balance hole 4, the fluid can enter the guide hole 52 through the annular triangular groove 51 and then flow into the pressure balance hole 4. This avoids the fluid directly and at high speed impacting the upper surface of the connecting block 21 or the pressure balance hole 4, thus playing a guiding role.

[0050] In addition, a triangular protrusion is provided between two adjacent guide holes 52 to further guide the fluid into the guide hole 52 and avoid impacting the area between the two adjacent guide holes 52.

[0051] The upper outer edge of the annular triangular groove 51 is connected to the outer circumferential surface of the guide platform 5, and the upper inner edge of the annular triangular groove 51 is connected to the outer circumferential surface of the rod.

[0052] like Figure 4 As shown, similarly, in order to prevent the medium fluid from entering the upper part of the valve disc 3 from the lower part of the valve disc 3 and impacting the connecting block 21, the lower end of the pressure balance hole 4 is connected to the inner side of the valve disc 3, and the lower end face of the connecting block 21 is provided with a downwardly extending inverted cone 6. The conical surface of the inverted cone 6 is provided with a plurality of arc-shaped grooves 61, and the upper arc-shaped edge of the arc-shaped grooves 61 is connected to the circumferential surface of the pressure balance hole 4; the inverted cone 6 and the connecting block 21 are integrally formed.

[0053] When the fluid medium flows upward from the space below the valve disc 3, through the pressure balance hole 4, into the space above the valve disc 3, the inverted frustum 6 formed on the lower end face of the connecting block 21 and extending downward and the arc-shaped groove 61 on the tapered side wall thereof play an inlet flow guiding role, and the inverted frustum 6 and the arc-shaped groove 61 constitute a structure for collecting fluid from the lower region, which can more smoothly and effectively guide and collect the fluid from the lower region of the valve disc to the lower end inlet of the pressure balance hole 4, reducing the turbulence phenomenon and local pressure loss of the fluid when entering the orifice, thereby ensuring that the pressure balance passage can quickly and smoothly respond to pressure changes and achieve effective pressure balance function.

[0054] The upper circumferential edge of the inverted frustum 6 is connected with the inner side face of the valve disc 3, and the maximum radius of the arc-shaped groove 61 is equal to the radius of the pressure balance hole 4. The radius of the arc-shaped groove 61 increases from bottom to top along the inverted frustum 6.

[0055] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples can be combined and combined by those skilled in the art without contradiction.

[0056] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0057] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present application, and are not intended to limit the scope of the present application. For those skilled in the art, other changes or modifications can be made on the basis of the above-mentioned embodiments, and these changes or modifications are still within the scope of the present application.

Claims

1. A regulating valve of unitary construction, characterized in that, The valve comprises a valve body (1), a valve clapper (3) and a valve stem (2), the valve body (1) is provided with a medium inlet flow channel (11), a medium outlet flow channel (12) and a valve cage, the valve cage is arranged in the valve body (1), the lower end of the valve cage is in sealing connection with the medium outlet flow channel (12), the upper end of the valve cage is in sealing connection with the inner wall of the valve body (1), the side wall of the valve cage is arranged in the medium inlet flow channel (11), and the lower section of the valve cage is provided with a plurality of flow regulating holes, the valve clapper (3) is arranged in the valve cage, and the outer side of the valve clapper (3) is in dynamic sealing connection with the inner side of the valve cage. The lower end of the valve stem (2) extends through the valve body (1) to the upper end of the valve clapper (3), and the valve stem (2) and the valve clapper (3) are integrally formed to form a rigid whole.

2. A control valve of unitary construction according to claim 1, wherein The valve clapper (3) is a cylindrical structure, and the outer side of the valve clapper (3) is in dynamic sealing fit with the inner side of the valve cage. The valve stem (2) comprises a stem body and a connecting block (21), the lower end of the stem body is connected with the upper end surface of the connecting block (21), the connecting block (21) is arranged inside the upper end of the valve clapper (3), and the outer side of the connecting block (21) is connected with the inner side of the valve clapper (3). The valve clapper (3), the stem body and the connecting block (21) are integrally formed.

3. A trim valve of unitary construction according to claim 2, wherein A plurality of pressure balance holes (4) are arranged on the connecting block (21) and extend through the upper end surface and the lower end surface thereof.

4. The trim valve of claim 2 wherein, The valve clapper (3) and the valve stem (2) are made of corrosion-resistant alloy steel or stainless steel, and the outer surfaces of the valve clapper (3) and the valve stem (2) are subjected to chrome plating or nitriding treatment.

5. The trim valve of claim 3 wherein, The upper end surface of the connecting block (21) is provided with an upwardly extending flow guide table (5), the outer side of the flow guide table (5) is in dynamic sealing fit with the inner side of the valve cage, the upper end surface of the flow guide table (5) is provided with an annular triangular inverted groove (51), the bottom surface of the annular triangular inverted groove (51) is provided with a flow guide hole (52) communicating with the upper end of the pressure balance hole (4). The flow guide table (5) is integrally formed with the stem body and the connecting block (21).

6. A trim valve of unitary construction according to claim 5 wherein, A triangular protrusion is arranged between two adjacent flow guide holes (52).

7. A trim valve of unitary construction according to claim 5 wherein, The upper outer circular edge of the annular triangular inverted groove (51) is connected with the outer circumferential surface of the flow guide table (5), and the upper inner circular edge of the annular triangular inverted groove (51) is connected with the outer circumferential surface of the stem body.

8. The trim valve of claim 3 wherein, The lower end of the pressure balance hole (4) is connected with the inner side of the valve clapper (3), the lower end surface of the connecting block (21) is provided with a downwardly extending inverted conical table (6), the conical surface of the inverted conical table (6) is provided with a plurality of arc-shaped grooves (61), and the upper arc-shaped edge of the arc-shaped groove (61) is connected with the circumferential surface of the pressure balance hole (4). The inverted conical table (6) is integrally formed with the connecting block (21).

9. A trim valve of unitary construction according to claim 8 wherein, The upper circumferential edge of the inverted conical table (6) is connected with the inner side of the valve clapper (3), and the maximum radius of the arc-shaped groove (61) is equal to the radius of the pressure balance hole (4).

10. A trim valve of unitary construction according to claim 9, wherein The radius of the arc-shaped groove (61) increases sequentially from bottom to top along the inverted frustum (6).

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