Piston flow regulating valve

Abstract

This utility model provides a piston-type flow regulating valve, relating to the field of flow regulating valve technology. It includes a housing and a regulating mechanism disposed inside the housing. The regulating mechanism includes an inner liner, a piston body, and a cage. The inner liner is located inside the housing and forms a flow cavity with the inner wall of the housing. An mounting plate is installed inside the piston body, and the cage is partially embedded in the piston body and connected to the mounting plate. By setting the sealing structure as a first sealing ring and a second sealing ring, a primary seal is achieved between the cage and the flow cavity. Based on this primary seal, the second sealing ring abuts against the first sealing ring during sealing, achieving a double-layer seal for the flow cavity. This solves the problem of loosening of the sealing structure between the piston body and the cage during the repeated movement of the piston body, thus improving the overall sealing effect of the piston-type flow regulating valve.

Description

Technical Field

[0001] This utility model relates to the field of flow control valve technology, specifically to a piston-type flow control valve. Background Technology

[0002] Piston-type flow control valves are valves that control flow and pressure by moving a piston back and forth. They are widely used in water conservancy projects and industrial pipeline systems.

[0003] Currently, commonly used piston-type flow control valves include an outer shell, a control mechanism, an inner liner, and a squirrel cage. The flow control valve controls the flow rate and pressure by utilizing the reciprocating motion of the piston in the control mechanism relative to the outer shell and the squirrel cage, thus meeting the relevant needs of water conservancy projects and industrial pipeline systems.

[0004] In the prior art, during the use of flow control valves, a single annular sealing ring is often used to seal the contact between the piston body 41 and the squirrel cage. However, the sealing structure between the piston body 41 and the squirrel cage is prone to loosening during the repeated back-and-forth movement of the piston body 41, resulting in poor overall sealing performance of the piston-type flow control valve. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a piston-type flow regulating valve, which solves the problem that the sealing structure located between the piston body 41 and the squirrel cage is prone to loosening during the repeated back-and-forth movement of the piston body 41.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: In this utility model, the piston-type flow regulating valve includes an outer shell and a regulating mechanism disposed inside the outer shell. The control mechanism includes an inner liner, a piston body, and a mouse cage. The inner liner is located inside the outer shell and forms a flow cavity with the inner wall of the outer shell. An installation plate is installed inside the piston body, and the mouse cage is partially embedded in the piston body and connected to the installation plate. The inner liner is equipped with a drive rod, a crank, and a connecting rod. The crank is rotatably connected to the inner liner through the drive rod, and drives the piston body and the mouse cage to move closer to or away from the inner liner through the connecting rod, so that the mouse cage can circulate or close with the flow chamber. A sealing structure is provided between the mouse cage and the outer shell, and the sealing structure includes a sealing ring one and a sealing ring two. When the cage closes the flow chamber, the sealing ring one on the outer shell abuts against the piston body and also abuts against the sealing ring two installed on the piston body; The end of the first sealing ring near the inner liner is rounded, and the end of the second sealing ring near the first sealing ring covers the rounded corner of the first sealing ring that abuts against the inner liner.

[0007] Furthermore, a sealing groove is formed on the side of the mouse cage that is close to the piston body, and the second sealing ring is located in the sealing groove.

[0008] Furthermore, the piston body has a protrusion on the side near the mouse cage, and the piston body has a groove formed by the protrusion, which communicates with the sealing groove to form an embedded groove. The second sealing ring is embedded in the inner groove and covers the protrusion.

[0009] Furthermore, the inner wall of the piston body is provided with multiple ribs, each rib is annular, and an annular groove is formed between two adjacent ribs; The inner diameter of the annular rib is the same as the outer diameter of the mounting plate.

[0010] Furthermore, a cover is installed on the outer shell, and the mouse cage is located inside the cover.

[0011] Furthermore, a mating groove is formed between the cover and the outer shell; The cross-section of the first sealing ring is L-shaped, and a portion of the L-shaped sealing ring is located within the mating groove.

[0012] Furthermore, the bottom of the outer casing is provided with multiple bases.

[0013] Furthermore, a tail cap is installed on the side of the inner liner away from the rat cage.

[0014] (III) Beneficial Effects This invention provides a piston-type flow regulating valve. Compared with the prior art, it has the following advantages: By setting the sealing structure in the form of sealing ring one and sealing ring two, when sealing between the squirrel cage and the flow chamber, sealing ring one abuts against the piston body to achieve a primary seal of the flow chamber by the squirrel cage. On the basis of the primary seal, the sealing ring two abuts against sealing ring one during sealing, achieving a double seal of the flow chamber by the sealing structure. This solves the problem that the sealing structure located between the piston body and the squirrel cage is prone to loosening during the repeated back and forth movement of the piston body, thus improving the overall sealing effect of the piston-type flow regulating valve. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional view of a piston-type flow control valve; Figure 2 for Figure 1 Cross-sectional view of a piston-type flow control valve; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0017] Figure label: 1. Base; 2. Outer shell; 20. Flow chamber; 3. Cover; 30. Sealing ring one; 31. Sealing groove; 4. Adjustment mechanism; 40. Inner liner; 41. Piston body; 411. Annular groove; 412. Rib plate; 413. Protrusion; 42. Mouse cage; 43. Mounting plate; 5. Drive rod; 50. Crank; 51. Connecting rod; 52. Tail cover; 6. Sealing ring two. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] This application provides a piston-type flow regulating valve, which solves the problem that the sealing structure between the piston body 41 and the squirrel cage is prone to loosening during the repeated back-and-forth movement of the piston body 41, thereby improving the overall sealing effect of the piston-type flow regulating valve.

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] Example: like Figures 1-3 As shown, a piston-type flow control valve includes a housing 2 and a control mechanism 4 disposed inside the housing 2. The control mechanism 4 includes an inner liner 40, a piston body 41, and a mouse cage 42. The inner liner 40 is located inside the outer shell 2 and forms a flow cavity 20 with the inner wall of the outer shell 2. An installation plate 43 is installed inside the piston body 41, and the mouse cage 42 is partially embedded in the piston body 41 and connected to the installation plate 43. The inner liner 40 is equipped with a drive rod 5, a crank 50 and a connecting rod 51. The crank 50 is rotatably connected to the inner liner 40 through the drive rod 5, and drives the piston body 41 and the mouse cage 42 to move closer to or away from the inner liner 40 through the connecting rod 51, so that the mouse cage 42 can circulate or close with the flow chamber 20. A sealing structure is provided between the mouse cage 42 and the outer shell 2, and the sealing structure includes a sealing ring 30 and a sealing ring 6. When the cage 42 closes the flow chamber 20, the sealing ring 30 on the outer shell 2 abuts against the piston body 41 and the sealing ring 6 installed on the piston body 41. The end of the sealing ring 30 near the inner liner 40 is rounded, and the end of the sealing ring 6 near the sealing ring 30 covers the rounded corner where the sealing ring 30 abuts against the inner liner 40.

[0022] By setting the sealing structure as sealing ring 30 and sealing ring 6, when sealing between the squirrel cage 42 and the flow cavity 20, sealing ring 30 abuts against the piston body 41 to achieve a primary seal between the squirrel cage 42 and the flow cavity 20. On the basis of the primary seal, the sealing ring 6 abuts against sealing ring 30 during sealing to achieve a double seal between the sealing structure and the flow cavity 20. This solves the problem that the sealing structure between the piston body 41 and the squirrel cage 42 is prone to loosening during the repeated movement of the piston body 41, thus improving the overall sealing effect of the piston-type flow regulating valve. Furthermore, when setting the sealing ring 30 and the sealing ring 6, the end of the sealing ring 30 near the inner liner 40 is rounded, and the end of the sealing ring 6 near the sealing ring 30 covers the rounded corner where the sealing ring 30 abuts against the inner liner 40, so as to achieve a tighter fit between the sealing ring 6 and the sealing ring 30, and further enhance the sealing effect of the double-layer seal.

[0023] like Figures 2-3 As shown, a sealing groove 31 is formed on the side of the mouse cage 42 and the piston body 41 that are close to each other, and the sealing ring 6 is located in the sealing groove 31.

[0024] Through the sealing groove 31 formed between the cage 42 and the piston body 41, when the cage 42 is partially embedded in the piston body 41 and fixed to the piston body 41, the cage 42 can squeeze the inner ring of the sealing ring 6 located in the sealing groove 31, thereby improving the stability of the installation of the sealing ring 6 and reducing the problem that the sealing ring 6 is prone to loosening after long-term use, resulting in poor sealing effect.

[0025] like Figures 2-3 As shown, the piston body 41 has a protrusion 413 on the side near the mouse cage 42, and the piston body 41 has a groove formed by the protrusion 413. The groove communicates with the sealing groove 31 to form an embedded groove. The sealing ring 26 is embedded in the inner groove and covers the protrusion 413.

[0026] By providing a protrusion 413 on the side of the piston body 41 near the cage 42, the groove formed by the protrusion 413 is used to initially embed the sealing ring 6, thereby facilitating the initial fixation of the sealing ring 6 within the inner groove and further improving the stability of the sealing ring 6 after installation, thus enhancing the sealing effect of the sealing ring 6 as a sealing structure. The cross-sectional shape of the sealing ring 6 located in the sealing groove 31 is as follows. Figure 3 The text is in bold black.

[0027] like Figure 2 As shown, the inner wall of the piston body 41 is provided with a plurality of ribs 412, each rib 412 is annular, and an annular groove 411 is formed between two adjacent ribs 412. The inner diameter of the annular rib 412 is the same as the outer diameter of the mounting plate 43.

[0028] By setting a rib plate 412 inside the piston body 41, and setting the inner diameter of the annular rib plate 412 to be consistent with the outer diameter of the mounting plate 43, the rib plate 412 ensures that the mounting plate 43 is connected to the inner wall of the inner liner 40 through the rib plate 412, and can effectively prevent the piston body 41 from detaching from the inner liner 40 when the squirrel cage 42 and the mounting plate 43 detach, thus preventing injury to personnel near the flow regulating valve during maintenance or trial operation.

[0029] like Figures 1-2 As shown, a cover 3 is installed on the outer shell 2, and the mouse cage 42 is located inside the cover 3. The installed cover 3 provides protection for the mouse cage 42.

[0030] Specifically, the cover 3 is fixed to the outer shell 2 by bolts.

[0031] like Figures 2-3 As shown, a mating groove is formed between the cover 3 and the outer shell 2; The cross-section of the sealing ring 30 is L-shaped, and the L-shaped portion of the sealing ring 30 is located within the mating groove.

[0032] A mating groove is formed between the cover 3 and the outer shell 2. The mating groove is used to limit the sealing ring 30, thereby enhancing the stability of the installation of the sealing ring 30 and improving the sealing effect of the sealing ring 30 as a sealing structure.

[0033] like Figure 1 As shown, the bottom of the outer shell 2 is provided with a plurality of bases 1 for supporting the outer shell 2; like Figure 2 As shown, a tail cover 52 is installed on the side of the inner liner 40 away from the cage 42. The detachable tail cover 52 facilitates the inspection and maintenance of the drive rod 5 and crank 50 inside the inner liner 40.

[0034] It should be noted that when installing a piston-type flow control valve: The inner liner 40 is welded to the inner wall of the outer shell 2 by reinforcing ribs; Bolts pass through the squirrel cage 42 and the mounting plate 43 to fix the piston body 41, the squirrel cage 42 and the mounting plate 43; When installing the mouse cage 42 and the mounting plate 43, the sealing ring 6 is first embedded in the groove formed by the protrusion 413 on the inner liner 40. Then, part of the mouse cage 42 is embedded in the inner liner 40 to press the sealing ring 6. After pressing and contacting, the bolt passes through the mouse cage 42 and the mounting plate 43 to fix the piston body 41, the mouse cage 42 and the mounting plate 43. After the rat cage 42 is installed, the sealing ring 30 is then installed and fixed onto the outer shell 2. Finally, bolts are used to pass through the cover 3 and the outer shell 2 to complete the installation of the sealing ring 30 and the cover 3. During operation, the external driving force drives the drive rod 5 to rotate, thereby controlling the crank 50 and connecting rod 51 to drive the squirrel cage 42 to reciprocate, so as to realize the connection and closure of the squirrel cage 42 and the flow chamber 20, and realize the flow control valve to control the flow and pressure. The working principle of the drive rod 5 driving the crank 50 and the connecting rod 51 to move the cage 42 back and forth along the inner liner 40 to control the flow and pressure is existing technology and will not be described in detail here.

[0035] In summary, compared with existing technologies, it has the following beneficial effects: 1. By setting the sealing structure as sealing ring 30 and sealing ring 6, when sealing between the squirrel cage 42 and the flow cavity 20, sealing ring 30 abuts against the piston body 41 to achieve a primary seal between the squirrel cage 42 and the flow cavity 20. On the basis of the primary seal, sealing ring 6 abuts against sealing ring 30 during sealing to achieve a double seal between the sealing structure and the flow cavity 20. This solves the problem that the sealing structure between the piston body 41 and the squirrel cage 42 is prone to loosening during the repeated movement of the piston body 41, thus improving the overall sealing effect of the piston-type flow regulating valve. Furthermore, when setting the sealing ring 30 and the sealing ring 6, the end of the sealing ring 30 near the inner liner 40 is rounded, and the end of the sealing ring 6 near the sealing ring 30 covers the rounded corner where the sealing ring 30 abuts against the inner liner 40, so as to achieve a tighter fit between the sealing ring 6 and the sealing ring 30, and further enhance the sealing effect of the double-layer seal.

[0036] 2. Through the sealing groove 31 formed between the squirrel cage 42 and the piston body 41, when the squirrel cage 42 is partially embedded in the piston body 41 and fixed to the piston body 41, the squirrel cage 42 can squeeze the inner ring of the sealing ring 6 located in the sealing groove 31, thereby improving the stability of the installation of the sealing ring 6 and reducing the problem that the sealing ring 6 is prone to loosening after long-term use, resulting in poor sealing effect.

[0037] 3. By setting a protrusion 413 on the side of the piston body 41 near the cage 42, the groove formed by the protrusion 413 is used to achieve the initial embedding of the sealing ring 6, which facilitates the initial fixation of the sealing ring 6 in the inner groove, and further improves the stability of the sealing ring 6 after installation, and enhances the sealing effect of the sealing ring 6 as a sealing structure.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A piston flow regulating valve, characterized in that Includes an outer shell (2) and a control mechanism (4) located inside the outer shell (2); The control mechanism (4) includes an inner liner (40), a piston body (41), and a mouse cage (42). The inner liner (40) is located inside the outer shell (2) and forms a flow cavity (20) with the inner wall of the outer shell (2). An installation plate (43) is installed inside the piston body (41). The mouse cage (42) is partially embedded in the piston body (41) and connected to the installation plate (43). The inner liner (40) is equipped with a drive rod (5), a crank (50) and a connecting rod (51). The crank (50) is rotatably connected to the inner liner (40) through the drive rod (5), and drives the piston body (41) and the mouse cage (42) to move closer to or away from the inner liner (40) through the connecting rod (51), so that the mouse cage (42) can circulate or close with the flow chamber (20). A sealing structure is provided between the mouse cage (42) and the outer shell (2), the sealing structure including sealing ring one (30) and sealing ring two (6). When the rat cage (42) closes the flow chamber (20), the sealing ring one (30) on the outer shell (2) abuts against the piston body (41) and abuts against the sealing ring two (6) installed on the piston body (41); The end of the first sealing ring (30) near the inner liner (40) is rounded, and the end of the second sealing ring (6) near the first sealing ring (30) covers the rounded corner where the first sealing ring (30) abuts against the inner liner (40).

2. A piston flow regulator according to claim 1, wherein A sealing groove (31) is formed on the side of the mouse cage (42) and the piston body (41) that are close to each other, and the second sealing ring (6) is located in the sealing groove (31).

3. A piston flow regulator according to claim 2, wherein The piston body (41) has a protrusion (413) on the side near the mouse cage (42), and the piston body (41) has a groove formed by the protrusion (413). The groove and the sealing groove (31) are connected to form an embedded groove. The sealing ring 2 (6) is embedded in the inner groove and covers the protrusion (413).

4. A piston flow regulator as defined in claim 1, wherein The inner wall of the piston body (41) is provided with multiple ribs (412), each rib (412) is annular, and an annular groove (411) is formed between two adjacent ribs (412). The inner diameter of the annular rib (412) is the same as the outer diameter of the mounting plate (43).

5. A piston flow regulator as defined in claim 1, wherein A cover (3) is installed on the outer shell (2), and the rat cage (42) is located inside the cover (3).

6. A piston flow regulator according to claim 5, wherein A mating groove is formed between the cover (3) and the outer shell (2); The cross-section of the sealing ring (30) is L-shaped, and part of the L-shaped sealing ring (30) is located in the mating groove.

7. A piston flow regulator as defined in claim 1, wherein The bottom of the outer shell (2) is provided with multiple bases (1).

8. A piston flow regulator as defined in claim 1, wherein The inner liner (40) is fitted with a tail cap (52) on the side away from the rat cage (42).

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