Valve cage structure for guiding valve core of regulating valve

Abstract

The utility model discloses a valve cage structure for guiding a valve element of a regulating valve, and belongs to the technical field of regulating valves. Comprising a valve body, a valve cover, a valve rod, a valve element assembly, a valve cage, a valve cage guide hole body and a guide sleeve. One side of the valve body is an inlet end, and the other side is an outlet end; a valve cover is arranged above the valve body; a valve cage guide hole body is arranged at the upper end of the valve cage; a through cylindrical guide hole is formed in the middle of the valve cage guide hole body; a guide sleeve is arranged on the inner side wall of the guide hole; the valve element assembly is movably arranged in the guide hole. A valve rod is arranged at the upper end of the valve core assembly; the valve rod drives the valve element assembly to move upwards, the valve moves upwards synchronously, the inlet end communicates with the outlet end, and the valve is opened; otherwise, the valve is closed. The adjusting valve solves the problems that according to an existing adjusting valve, a valve element assembly directly makes contact with a guide hole, friction between metal is large, abrasion is prone to being caused, a valve element is jammed, and materials leak.

Description

Technical Field

[0001] The utility model belongs to the technical field of regulating valves, and in particular relates to a valve cage structure for guiding a valve core of a regulating valve. Background Art

[0002] A regulating valve is a throttling element with variable local resistance. The valve core moves within the valve body, changing the flow area between the core and the valve seat, thereby regulating the flow of the measured medium and controlling process parameters such as pressure, temperature, liquid level, and flow rate. Valve cores are categorized into two types: linear and quarter-turn. Linear valve cores change the flow area between the core and the valve seat through linear motion, while quarter-turn valve cores change the flow area between the core and the valve seat through rotational motion.

[0003] The regulating valve body also features a valve seat, which seals the regulating valve. A cage is located above the seat, sealing the seat and guiding the valve core assembly. A cage guide hole is located above the cage, with a guide hole defined in its center. The valve core assembly moves up and down within the guide hole, guiding the valve core assembly. Both the valve core assembly and the cage guide hole are made of metal. While lubricants such as silicone oil can be applied between them, the metal-to-metal contact creates significant friction. This friction can easily cause wear between the valve core assembly and the cage guide hole, altering the seal and potentially leading to material leakage. Utility Model Content

[0004] This utility model provides a valve cage structure for guiding the valve core of a regulating valve. This structure employs a PTFE or PPL guide sleeve mounted on the sidewall of the guide hole of the cage guide hole. During valve opening and closing, the outer wall of the valve core assembly directly contacts the inner wall of the guide sleeve, eliminating metal-to-metal friction and preventing wear, leakage, and valve core jamming. This solves the problem of existing regulating valves where the valve core assembly directly contacts the guide hole, resulting in significant metal-to-metal friction and wear, which can lead to valve core jamming and leakage.

[0005] In order to achieve the above technical objectives, the present invention is implemented through the following technical solutions:

[0006] A valve cage structure for guiding a valve core of a regulating valve, comprising: a valve body, a valve cover, a valve stem, a valve core assembly, a valve cage, a valve cage guide hole body and a guide sleeve;

[0007] One side of the valve body is set as an inlet end, and the other side is set as an outlet end;

[0008] A valve cover is provided above the valve body;

[0009] A cage is provided inside the valve body, and a cage guide hole is provided on the upper end of the cage;

[0010] A cylindrical guide hole is provided in the middle of the guide hole body of the cage;

[0011] A guide sleeve is provided on the inner side wall of the guide hole;

[0012] The valve core assembly is movably arranged in the guide sleeve;

[0013] The valve stem is provided at the upper end of the valve core assembly, and the valve is provided at the lower end of the valve core assembly;

[0014] The valve stem drives the valve core assembly to move upward, and the valve moves upward synchronously, connecting the inlet end and the outlet end, and the valve is opened; otherwise, the valve is closed.

[0015] Preferably, an annular groove is provided on the inner side wall of the guide hole;

[0016] A portion of the guide sleeve is embedded in the annular groove, and another portion of the guide sleeve protrudes from the annular groove.

[0017] Preferably, the cross section of the annular groove is a "T"-shaped structure.

[0018] The width of the annular groove opening side is smaller than the width of the groove body;

[0019] The cross section of the guide sleeve is an I-shaped structure;

[0020] The short side of the guide sleeve is embedded in the annular groove; the long side of the guide sleeve is fitted on the side wall of the guide hole.

[0021] Preferably, the guide sleeve and the valve cage guide hole body are fastened together by providing a pin.

[0022] Preferably, a lubricant storage tank is provided inside the guide sleeve;

[0023] A plurality of lubricant seepage holes are evenly provided on the side wall of the guide sleeve in contact with the valve core assembly;

[0024] The lubricant seepage hole is communicated with the lubricant storage tank.

[0025] Preferably, a feeding port is provided at the upper end of the guide sleeve, and the feeding port is communicated with the lubricant storage tank;

[0026] The feeding port is provided with a blocking bolt in a detachable manner through threaded engagement.

[0027] Preferably, a wear-resistant coating is provided on the contact surface between the guide sleeve and the valve core assembly.

[0028] Preferably, a valve seat is provided at the lower end of the valve cage; the valve seat is pressed and fixed by the valve cage.

[0029] Preferably, the valve body and the valve cover are connected and fixed by arranging a double-headed stud and a nut.

[0030] Preferably, a packing sleeve and a shaft sleeve are provided on the inner side wall of the upper opening of the valve cover;

[0031] A polyfluoroethylene filler is filled between the packing sleeve and the shaft sleeve.

[0032] The beneficial effects of the utility model are:

[0033] The utility model provides a valve cage structure for guiding the valve core of a regulating valve. A guide hole is opened in the valve cage guide hole body arranged above the valve cage for guiding the valve core assembly; a guide sleeve made of PTFE or PPL material is provided on the inner side wall of the guide hole; the guide sleeve is in contact with the valve core assembly, which can avoid direct contact between the valve core assembly and the inner side wall of the guide hole, resulting in greater metal-to-metal friction, causing wear, material leakage or jamming of the valve core assembly.

[0034] The guide sleeve is embedded in the guide hole through an annular groove. The cross-section of the annular groove is "T"-shaped, and the cross-section of the guide sleeve is set to an "I"-shaped structure; one side of the guide sleeve is embedded in the "T"-shaped annular groove, and the other side is fitted to the side wall of the guide hole; the "T"-shaped annular groove cooperates with the "I"-shaped guide sleeve, making the guide sleeve embedded more firmly, avoiding the guide sleeve from loosening due to the friction of the valve core assembly.

[0035] A lubricant storage tank is provided inside the side of the guide sleeve that contacts the valve core assembly, and a lubricant seepage hole is provided on the side of the guide sleeve that contacts the valve core assembly. Lubricants such as silicone oil are stored in the lubricant storage tank. The lubricant can seep out from the lubricant seepage hole to the contact surface of the guide sleeve and the valve core assembly, thereby reducing the friction between the valve core assembly and the guide sleeve, and making the valve core assembly move up and down more smoothly.

[0036] A feeding port is provided at the upper end of the guide sleeve, which is communicated with the lubricant storage tank. A detachable sealing bolt is provided on the feeding port through a thread. By removing the sealing bolt, lubricant material can be added to the lubricant storage tank, and then the lubricant storage tank is sealed using the sealing bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0039] Figure 2 This is a partial enlarged schematic diagram B of the present invention; specifically, it is a schematic diagram of the structure between the valve core assembly and the guide sleeve;

[0040] Figure 3 This is a schematic diagram of the embedded connection structure between the annular groove with a "T"-shaped cross section and the guide sleeve with an "I"-shaped cross section of the utility model;

[0041] Figure 4 This is a schematic diagram of the structure of a T-shaped annular groove on the inner side wall of the guide hole of the guide hole body of the cage of the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of the lubricant storage tank provided in the guide sleeve and the wear-resistant coating provided on the contact surface between the guide sleeve and the valve core assembly of the utility model;

[0043] Figure 6 This is a partial enlarged schematic diagram A of the present invention; specifically, it is a schematic diagram of the lubricating material seepage hole provided on the contact surface between the guide sleeve and the valve core assembly; and a structural diagram of the feeding port opened above the guide sleeve.

[0044] In the accompanying drawings, the structural names represented by the reference numerals are:

[0045] 1-valve body, 2-valve seat gasket, 3-valve seat, 4-valve cage, 5-valve core assembly, 501-valve, 6-guide sleeve, 601-groove embedded side, 602-lubricant storage tank, 603-lubricant seepage hole, 604-wear-resistant coating, 605-filling port, 606-sealing bolt, 7-valve cover gasket, 8-valve cover, 9-valve cage guide hole body, 901-pin, 10-guide hole, 11-annular groove, 12-shaft sleeve, 13-O-ring, 14-PTFE packing, 15-round nut, 16-packing sleeve, 17-C-type dust ring, 18-packing pressure plate, 19-stud stud, 20-nut. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Example 1

[0048] A valve cage structure for guiding a valve core of a regulating valve, comprising: a valve body 1, a valve cover 8, a valve stem, a valve core assembly 5, a valve cage 4, a valve cage guide hole 9 and a guide sleeve 6;

[0049] like Figure 1 As shown, the left side of the valve body 1 of the regulating valve is set as the inlet end, and the right side is set as the outlet end, and the inlet end is connected to the outlet end in the valve body 1;

[0050] A detachable valve cover 8 is provided above the valve body 1, and a valve cover gasket 7 is provided between the valve cover 8 and the valve body 1. The valve cover gasket 7 can seal the valve cover 8 and the valve body 1 and avoid direct contact between the metal valve cover 8 and the valve body 1. The valve cover 8 and the valve body 1 are connected by studs, and nuts are provided on the studs to achieve fastening of the valve body 1 and the valve cover 8.

[0051] The interior of the valve body 1 is a hollow structure, in which a valve cage 4 is arranged. The valve cage 4 is a cylindrical structure with holes or a cage mesh structure on the side wall. A valve cage guide hole body 9 is arranged at the upper end opening of the valve cage 4. The entire valve cage guide hole body 9 is located at the upper end opening position of the valve body 1. A guide hole 10 is centrally provided in the valve cage guide hole body 9. The guide hole 10 is a cylindrical hole structure.

[0052] A valve core assembly 5 is arranged in the guide hole 10 so as to be movable in the up and down directions. The valve core assembly 5 is also arranged in a cylindrical structure and can move up and down relative to the guide hole 10; the upper end of the valve core assembly 5 is connected to the lower end of the valve stem, and an embedding groove is provided on the upper end surface of the valve core assembly 5. The lower end of the valve stem is arranged in the embedding groove and the two are connected and fixed by a pin; a valve 501 is provided at the lower end of the valve core assembly 5; the valve stem moves upward under the driving action, driving the valve core assembly 5 and the valve 501 to move upward together, and the valve 501 gradually opens the connecting channel between the inlet end and the outlet end on the valve body 1. At this time, the regulating valve gradually opens and the opening flow gradually increases; conversely, the valve stem drives the valve core assembly 5 and the valve 501 to move downward, and the connecting channel between the inlet end and the outlet end of the valve body 1 is gradually blocked by the valve, and the regulating valve gradually closes. When the valve 501 moves down to the lowest position, the connecting channel between the inlet end and the outlet end is completely blocked, and the regulating valve is completely closed.

[0053] When the regulating valve is in the closed state, in order to avoid leakage of liquid material at the valve 501, Figure 1 As shown, a valve seat 3 is provided on the valve body 1 at the lowest point of the valve 501. When the valve 501 moves down to the lowest point, the valve 501 abuts against the valve seat 3. At this time, the valve seat 3 acts as a seal to prevent material leakage at the valve 501. A valve seat gasket 2 is provided between the bottom of the valve seat 3 and the valve body 1. The top of the valve seat 3 is pressed by the lower end of the valve cage 4 to ensure that the valve seat 3 is firmly installed.

[0054] The valve stem is passed through the valve cover 8 from the middle of the valve cover 8, and the valve stem can move up and down relative to the valve cover 8; in order to ensure a good sealing effect between the upper opening of the valve cover 8 and the valve stem to prevent leakage of fluid materials, etc.; a packing assembly is set between the inner wall of the upper opening of the valve cover 8 and the valve stem; the packing assembly includes: PTFE packing 14, packing sleeve 16 and shaft sleeve 12; the shaft sleeve 12 is set at the bottom, and a packing sleeve 16 is set above the shaft sleeve 12, and the space between the packing sleeve 16 and the shaft sleeve 12 is filled with PTFE packing 14; the entire packing assembly plays a key sealing role; on the shaft sleeve 1 2 is evenly distributed with a number of O-rings 13, and the O-rings 13 alone have a sealing effect on the shaft sleeve 12; a packing pressure plate 18 is provided above the packing gland 16, and a C-type dust ring 17 is provided on the contact surface between the packing pressure plate 18 and the packing gland 16 to prevent dust from entering from the upper opening of the valve cover 8; the packing pressure plate 18 and the valve cover 8 are connected by studs 19, and nuts 20 are provided on the studs 19. Screwing the nuts 20 can press the packing pressure plate 18 downward, thereby fixing the packing gland 16 and the packing assembly below, and preventing the packing from falling out of the upper end of the valve cover 8.

[0055] The valve core assembly 5 and the valve cage guide hole body 9 are both made of metal. During the up and down movement of the valve core assembly 5, its outer wall is in direct contact with the inner wall of the valve cage guide hole body 9. The friction between the metals will be relatively large, and the metals will contact each other, which will cause great wear on both. Once there is significant wear between the valve core assembly 5 and the inner wall of the guide hole 10, the up and down movement of the valve core assembly 5 will become stuck, affecting the normal opening or closing of the valve body; in addition, at the worn area, fluid materials are likely to leak from the worn area.

[0056] like Figure 2As shown, in order to prevent the valve core assembly 5 from directly contacting the guide hole 10 in the valve cage guide hole body 9, a guide sleeve 6 is provided on the inner side wall of the guide hole 10. The guide sleeve 6 is made of PTFE or PPL material, which has wear resistance. When it contacts the metal valve core assembly 5, the wear between the two can be reduced, and there will be no mutual wear, thereby extending the service life; the guide sleeve 6 is installed on the inner side wall of the guide hole 10, and plays a guiding role for the valve core assembly 5. The most important thing is that it can contact the valve core assembly 5, so as to fix the valve core assembly 5 with the guide sleeve. The inner wall of the guide hole 10 is separated; therefore, the installation structure of the guide sleeve 6 is set as follows: an annular groove 11 is opened on the inner wall of the guide hole 10, preferably in the middle of the inner wall of the guide hole 10, and the guide sleeve 6 has a certain thickness. The guide sleeve 6 is located in the guide hole 10, and a part close to the inner wall of the guide hole 10 is embedded in the annular groove 11, and the other part protrudes from the annular groove 11. In this way, the valve core assembly 5 is in the guide sleeve 6, and the protruding part of the guide sleeve 6 can isolate the valve core assembly 5 from the guide hole 10 without affecting the up and down movement of the valve core assembly 5.

[0057] Lubricating materials such as silicone oil can be applied between the contact surfaces of the guide sleeve 6 and the valve core assembly 5 to further reduce the friction between the two and make the up and down movement of the valve core assembly 5 smoother.

[0058] Example 2

[0059] Based on Example 1, in Example 1, an annular groove 11 is opened on the inner wall of the guide hole 10, and a guide sleeve 6 is embedded in the annular groove 11. The guide sleeve 6 and the annular groove 11 can be fixed by gluing, and then fixed by setting pins 901 at equal intervals between the two; however, the annular groove 11 is an open groove body with a simple structure, and the guide sleeve 6 is directly embedded therein. Although the pins 901 are fixed at equal intervals, the valve core assembly 5 keeps moving up and down, and is in frictional contact with the guide sleeve 6. Under the action of friction between the two, each up and down movement will exert an upward or downward force on the guide sleeve 6. The position where the guide sleeve 6 is not provided with the pin 901 may fall out of the annular groove 11. After the guide sleeve 6 falls out, it will not only affect the guiding effect on the valve core assembly 5, but also each time the valve core moves up and down, the guide sleeve 6 will produce a tearing effect on the position where the pin 901 is provided on the side wall of the guide hole 10, eventually causing the guide sleeve 6 to be damaged.

[0060] In this embodiment, the annular groove 11 is set as a structure with a self-locking and limiting effect on the guide sleeve 6 as a whole. Figure 4As shown, the cross-section of the annular groove 11 is a "T"-shaped structure, and the width of the open side of the annular groove 11 is smaller than the width of the groove body itself; and the cross-section of the guide sleeve 6 that matches the annular groove 11 is an "I"-shaped structure; the short side of the "I"-shaped guide sleeve 6 is embedded in the groove body of the annular groove 11; the long side of the guide sleeve 6 is fitted on the side wall of the guide hole 10.

[0061] After the annular groove 11 structure and the guide sleeve 6 structure in this embodiment cooperate with each other, the annular groove 11 plays a fixed limiting role on the guide sleeve 6 as a whole in the up and down directions and the horizontal direction, preventing the guide sleeve 6 from being passively pulled by the valve core assembly 5 under the up and down movement of the valve core assembly 5, causing the guide sleeve 6 to be separated from the annular groove 11 and eventually torn and damaged.

[0062] Example 3

[0063] Based on the embodiment 2, the valve core assembly 5 moves up and down in the guide sleeve 6, and the guide sleeve 6 guides the valve core assembly 5 while preventing the valve core assembly 5 from directly contacting the guide hole 10;

[0064] like Figure 5 As shown, in this embodiment, a lubricant reservoir 602 is provided within the long side of the guide sleeve 6. A plurality of lubricant seepage holes 603 are evenly distributed on the sidewall of the guide sleeve 6 where it contacts the valve core assembly 5. These lubricant seepage holes 603 communicate with the lubricant reservoir 602. Lubricant such as silicone oil is added to the lubricant reservoir 602, and the lubricant seeps through the lubricant seepage holes 603 onto the contact surface between the guide sleeve 6 and the valve core assembly 5, thereby lubricating the valve core assembly 5 as it moves up and down relative to the guide sleeve 6.

[0065] Example 4

[0066] Based on the embodiment 3, in the embodiment 3, the lubricant material is stored in the lubricant storage tank 602. When the lubricant stored inside is exhausted, in order to continue to add new lubricant to the lubricant storage tank 602; Figure 6 As shown, in this embodiment, a feeding port 605 is provided at the upper end of the long side of the guide sleeve 6, and the feeding port 605 is communicated with the lubricant storage tank 602; a sealing bolt 606 is detachably provided on the feeding port 605 through thread engagement.

[0067] After the blocking bolt 606 is removed, new lubricant can be added to the lubricant storage tank 602 . After the addition is completed, the blocking bolt 606 is reset to block the filling port 605 .

[0068] Example 5

[0069] Based on Example 1, in Example 1, the valve core assembly 5 is located in the guide sleeve 6, and the valve core assembly 5 can move up and down relative to the guide sleeve 6. During the up and down movement of the valve core assembly 5, it contacts the guide sleeve 6. Long-term use will cause a certain degree of wear to the guide sleeve 6. In order to extend the service life of the guide sleeve 6, as shown in FIG. Figure 5 As shown, in this embodiment, a wear-resistant coating 604 is provided on the contact surface between the guide sleeve 6 and the valve core assembly 5 , and the wear-resistant coating 604 can be made of a polymer material.

[0070] By providing the wear-resistant coating 604 , the wear resistance between the guide sleeve 6 and the valve core assembly 5 during contact can be improved.

[0071] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0072] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, numerous modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cage structure for guiding a regulating valve core, characterized in that: include: Valve body, bonnet, valve stem, valve core assembly, valve cage, valve cage guide hole body and guide sleeve; One side of the valve body is set as an inlet end, and the other side is set as an outlet end; A valve cover is provided above the valve body; A cage is provided inside the valve body, and a cage guide hole is provided on the upper end of the cage; A cylindrical guide hole is provided in the middle of the guide hole body of the cage; A guide sleeve is provided on the inner side wall of the guide hole; The valve core assembly is movably arranged in the guide sleeve; A valve stem is provided at the upper end of the valve core assembly, and a valve is provided at the lower end of the valve core assembly.

2. A cage structure for guiding a valve core of a regulating valve according to claim 1, characterized in that: An annular groove is provided on the inner side wall of the guide hole; A portion of the guide sleeve is embedded in the annular groove, and another portion of the guide sleeve protrudes from the annular groove.

3. A cage structure for guiding a valve core of a regulating valve according to claim 2, characterized in that: The cross section of the annular groove is a "T"-shaped structure. The width of the annular groove opening side is smaller than the width of the groove body; The cross section of the guide sleeve is an "I"-shaped structure; The short side of the guide sleeve is embedded in the annular groove; the long side of the guide sleeve is fitted on the side wall of the guide hole.

4. A cage structure for guiding a valve core of a regulating valve according to claim 1, characterized in that: The guide sleeve and the cage guide hole are fastened together by a pin.

5. The cage structure for guiding the valve core of a regulating valve according to claim 1, characterized in that: A lubricant storage tank is provided inside the guide sleeve; A plurality of lubricant seepage holes are evenly provided on the side wall of the guide sleeve in contact with the valve core assembly; The lubricant seepage hole is communicated with the lubricant storage tank.

6. A cage structure for guiding a valve core of a regulating valve according to claim 5, characterized in that: A feeding port is provided at the upper end of the guide sleeve, and the feeding port is communicated with the lubricant storage tank; The feeding port is provided with a blocking bolt in a detachable manner through threaded engagement.

7. The cage structure for guiding the valve core of a regulating valve according to claim 1, characterized in that: A wear-resistant coating is provided on the contact surface between the guide sleeve and the valve core assembly.

8. The cage structure for guiding the valve core of a regulating valve according to claim 1, characterized in that: A valve seat is provided at the lower end of the valve cage; the valve seat is pressed and fixed by the valve cage.

9. The cage structure for guiding the valve core of a regulating valve according to claim 1, characterized in that: The valve body and the valve cover are connected and fixed by arranging a double-headed stud and a nut.

10. The cage structure for guiding the valve core of a regulating valve according to claim 1, characterized in that: A packing sleeve and a shaft sleeve are provided on the inner side wall of the upper opening of the valve cover; A polyfluoroethylene filler is filled between the packing sleeve and the shaft sleeve.

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