A regulating valve with a liner

Abstract

The utility model relates to valve technical field, concretely relates to a regulating valve with lining, including valve body, the first lining is arranged in the valve body, and the inner wall of valve body is provided with a plurality of dovetail groove convenient for fixing first lining, the valve rod is inserted in the bonnet, the lower place of valve rod is sleeved with the valve core, the top surface of valve core is provided with the pouring hole, the outside of valve core is provided with the ring groove, the bottom of valve core is provided with the self -tightening mechanism, the utility model discloses through dovetail groove, pouring hole and ring groove, make the lining material and valve body form reliable connection, strengthen the fixed stability of lining, prolong the service life of valve, reduce the metal material amount, reduce the foundry cost, still effectively reduced the operating force needed to control valve rod, through the self -tightening mechanism cooperation valve core common sealing valve seat, the sealing performance of remarkable promotion, shared the valve -in -medium pressure that valve rod bore, improved the pressure -bearing capacity and reliability of valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a regulating valve with an inner liner. Background Technology

[0002] Valves can be classified into various types according to their structure, such as ball valves, butterfly valves, gate valves, and globe valves. They can also be classified according to their actuation method, such as manual, electric, and pneumatic. Their core function is to regulate and cut off the flow of media by changing the flow area between the valve core and the valve seat. In harsh conditions such as corrosion, erosion, or high temperatures, the valve cavity is often lined with anti-corrosion or wear-resistant materials to improve the valve body's durability and applicability.

[0003] However, existing lined control valves still have certain limitations in practical applications. On the one hand, the lining layer is mostly fixed to the inner wall of the valve body by bonding or mechanical pressing. Long-term exposure to media erosion and temperature changes can easily lead to loosening, peeling, or partial detachment of the lining, affecting the sealing effect and service life. On the other hand, the valve core and stem are usually directly connected by metal components, resulting in significant structural weight, high material costs, and large valve opening and closing torque. Furthermore, traditional valves often rely solely on the valve core pressing against the valve seat to achieve a seal during closure, which can easily lead to leakage under high pressure or particulate media conditions. The valve stem must independently withstand fluid pressure, placing high demands on the actuator and structural strength. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a regulating valve with an inner liner to solve the problems of unstable connection between the inner liner and the valve body, excessive valve stem operating torque, and insufficient valve sealing reliability.

[0005] To achieve the above objectives, this utility model provides a regulating valve with an inner liner, comprising a valve body, the valve body including a vertical section with the central opening facing upward and a left channel and a right channel respectively connected to both sides of the vertical section, a first inner liner being provided on the inner wall of the valve body, and a plurality of dovetail grooves being provided on the inner wall of the valve body to facilitate fixing the first inner liner, the upper end and the lower end of the valve body being open, a valve cover being installed at the upper end of the valve body, and a bottom cover being installed at the lower end of the valve body;

[0006] A valve stem is slidably inserted into the valve cover, and a valve core is fixedly sleeved at the lower part of the valve stem. A third inner liner is provided on the outside of the valve stem and the valve core. Several casting holes communicating with the outside of the valve core are provided on the top surface of the valve core, and an annular groove is opened on the outside of the valve core.

[0007] According to the technical solution provided in this application example, the left channel and the right channel are parallel to each other, the angle between the left channel and the right channel and the horizontal plane is 26 degrees, and one side of the outer wall of the valve body corresponding to the left channel and the right channel is perpendicular to the vertical section; the interior of the first liner is provided with a valve seat for cooperating with the valve core to realize the valve opening and closing.

[0008] According to the technical solution provided in this application example, a second inner liner is provided on the lower outer side of the valve cover, and a plurality of packing sealing rings for sealing the gap are sleeved between the valve stem and the valve cover.

[0009] According to the technical solution provided in this application, a large gasket for sealing is sandwiched between the bottom cover and the valve body, and a vertical sliding top rod is inserted into the middle of the bottom cover; a bolt for fixing the top rod is installed on the bottom surface of the bottom cover, and a small gasket for sealing is sandwiched between the top rod and the bolt.

[0010] According to the technical solution provided in this application, the bottom surface of the valve core is provided with a self-tightening mechanism. The self-tightening mechanism includes a funnel plate suspended away from the bottom end of the valve core, an annular plate fixed on the bottom surface of the valve core, and a movable liquid bladder fixed between the funnel plate and the annular plate. Several connecting rods are fixedly connected between the funnel plate and the annular plate.

[0011] According to the technical solution provided in this application example, the maximum outer diameter of the funnel plate and the annular plate is less than or equal to the outer diameter of the bottom surface of the valve core, the connecting rod is always located inside the movable liquid bladder, and a through hole for inserting the top rod is provided in the middle of the funnel plate.

[0012] According to the technical solution provided in this application, the movable liquid bladder is filled with liquid and the liquid volume is constant. A rod is vertically inserted and fixed to the bottom of the movable liquid bladder. The lower end of the rod passes through the bottom of the movable liquid bladder, and the top of the rod is always slidably inserted into the bottom end of the valve stem. A circular protrusion is vertically opened on the outside of the rod, and the top surface of the circular protrusion is fixedly attached to the bottom of the movable liquid bladder.

[0013] According to the technical solution provided in this application, the valve stem, the valve core, the top rod, and the insertion rod are all coaxially arranged; when the valve stem descends, the top rod rises relative to it and inserts into the through hole of the funnel plate. The top rod pushes the insertion rod upward and squeezes the movable liquid bladder upward, thereby causing the movable liquid bladder to expand outward through the gap between the funnel plate and the annular plate.

[0014] The beneficial effects of this utility model are:

[0015] 1. This type of liner-lined regulating valve features a dovetail groove on the inner wall of the valve body and a pouring hole and an annular groove on the valve core. During the pouring process, the liner material enters the dovetail groove, pouring hole, and annular groove. This ensures a reliable connection between the liner material and the valve body, enhancing the stability of the liner and extending the valve's service life. Simultaneously, this structure makes the connection between the valve core and valve stem more robust and stable, reducing the amount of metal material used, lowering casting costs, and effectively reducing the operating force required to rotate or lift the valve stem.

[0016] 2. This type of liner-lined regulating valve features a self-tightening mechanism at the bottom of both the valve stem and the valve core. When the valve core descends to close the valve, the push rod rises relative to it and inserts into the through-hole of the funnel plate. The push rod pushes the insert rod upward, compressing the movable liquid bladder. This causes the movable liquid bladder to expand outward through the gap between the funnel plate and the annular plate, filling and blocking the passage of the valve seat. This structure allows the movable liquid bladder to work in conjunction with the valve core to seal, significantly improving the sealing performance when the valve is closed. Simultaneously, after closing, the movable liquid bladder is in a state of compressing the valve seat, effectively sharing the pressure of the internal medium borne by the valve stem, thus improving the overall pressure-bearing capacity and reliability of the structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of an embodiment of the present utility model;

[0020] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0021] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0022] Figure 5 This is a cross-sectional view of the valve body in an embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional view of the first inner liner in an embodiment of the present invention;

[0024] Figure 7 This is a cross-sectional view of the valve core in an embodiment of the present invention;

[0025] Figure 8 This is a partial disassembled structural diagram of the self-tightening mechanism at the valve core in an embodiment of this utility model;

[0026] Figure 9 This is a partial cross-sectional structural diagram of the self-tightening mechanism in an embodiment of this utility model.

[0027] The diagram is marked as follows:

[0028] 100. Valve body; 101. Dovetail groove; 102. First inner liner; 110. Valve cover; 111. Second inner liner; 112. Packing seal ring; 120. Bottom cover; 121. Large gasket; 130. Top rod; 131. Bolt; 132. Small gasket;

[0029] 200, Valve stem; 210, Valve core; 211, Casting hole; 212, Annular groove; 220, Third liner;

[0030] 300. Self-tightening mechanism; 310. Funnel plate; 320. Ring plate; 321. Connecting rod; 330. Movable liquid bladder; 331. Insert rod. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] like Figures 1-9As shown, a liner-lined regulating valve includes a valve body 100. The valve body 100 includes a vertical section with the central opening facing upwards and a left channel and a right channel respectively connected to both sides of the vertical section. A first liner 102 is provided on the inner wall of the valve body 100, and a plurality of dovetail grooves 101 are provided on the inner wall of the valve body 100 to facilitate fixing the first liner 102. The upper and lower ends of the valve body 100 are both open. A valve cover 110 is installed on the upper end of the valve body 100, and a bottom cover 120 is installed on the lower end of the valve body 100, thereby facilitating the casting of the liner and maintenance of the valve.

[0034] A valve stem 200 is slidably inserted into the valve cover 110. A valve core 210 is fixedly sleeved at the lower part of the valve stem 200. A third inner liner 220 is provided on the outside of the valve stem 200 and the valve core 210. A number of pouring holes 211 connected to the outside of the valve core 210 are provided on the top surface of the valve core 210. An annular groove 212 is opened on the outside of the valve core 210, so that the inner liner material can enter the dovetail groove, the pouring hole and the annular groove during the pouring process, thereby making the inner liner material reliably connected to the valve body.

[0035] Preferably, the left and right channels are parallel to each other, and the angle between the left and right channels and the horizontal plane is 26 degrees, which facilitates the installation of flanges at the two ends of the left and right channels that are far apart from each other. One side of the outer wall of the valve body 100 corresponding to the left and right channels is perpendicular to the vertical section. The first inner liner 102 is provided with a valve seat for cooperating with the valve core 210 to realize the valve opening and closing. The valve seat has a channel for the valve core 210 to be inserted.

[0036] Preferably, a second inner liner 111 is provided on the lower outer side of the valve cover 110, and a plurality of packing sealing rings 112 for sealing the gap are sleeved between the valve stem 200 and the valve cover 110.

[0037] Specifically, a large gasket 121 for sealing is sandwiched between the bottom cover 120 and the valve body 100, and a vertical sliding top rod 130 is inserted into the middle of the bottom cover 120; a bolt 131 for fixing the top rod 130 is installed on the bottom surface of the bottom cover 120, and a small gasket 132 for sealing is sandwiched between the top rod 130 and the bolt 131, thereby strengthening the seal.

[0038] Specifically, the bottom surface of the valve core 210 is provided with a self-tightening mechanism 300. The self-tightening mechanism 300 includes a funnel plate 310 suspended away from the bottom end of the valve core 210, a circular ring plate 320 fixed on the bottom surface of the valve core 210, and a movable liquid bladder 330 fixedly disposed between the funnel plate 310 and the circular ring plate 320. Several connecting rods 321 are fixedly connected between the funnel plate 310 and the circular ring plate 320 to ensure the stability of the funnel plate 310. The third inner liner 220 wraps around the self-tightening mechanism 300 from top to bottom.

[0039] Preferably, the maximum outer diameter of the funnel plate 310 and the annular plate 320 is less than or equal to the outer diameter of the bottom surface of the valve core 210, so that they can be smoothly inserted into the valve seat with the valve core 210 when the valve is closed; the connecting rod 321 is always located inside the movable liquid bladder 330, and the funnel plate 310 has a through hole in the middle for inserting the push rod 130.

[0040] Preferably, the movable liquid bladder 330 is filled with liquid and the liquid volume is constant, so that the non-compressed part of the movable liquid bladder 330 can expand when squeezed; a rod 331 is vertically inserted and fixed to the bottom of the movable liquid bladder 330, the lower end of the rod 331 protrudes from the bottom of the movable liquid bladder 330 so that it can be touched by the top rod 130, and the top of the rod 331 is always slidably inserted into the bottom end of the valve rod 200, so that the movable liquid bladder 330 can expand outward more evenly when squeezed by the top rod 130; a circular protrusion is vertically opened on the outside of the rod 331, and the top surface of the circular protrusion is fixedly attached to the bottom of the movable liquid bladder 330, so as to facilitate the insertion and fixing of the rod 331 and the efficient squeezing of the movable liquid bladder 330.

[0041] Furthermore, the valve stem 200, valve core 210, push rod 130, and insert rod 331 are all coaxially arranged; when the valve is not closed, the upper part of the movable liquid bladder 330 has great elasticity and its outer edge can retract within the push rod 310 and the annular plate 320, thereby ensuring that the movable liquid bladder 330 can be fully inserted into the valve seat when it descends.

[0042] When the valve stem 200 descends to close the valve, the push rod 130 rises relative to it and inserts into the through hole of the funnel plate 310. The push rod 130 pushes the insert rod 331 to rise and squeezes the movable liquid bladder 330 upward. Then the movable liquid bladder 330 expands outward through the gap between the funnel plate 310 and the annular plate 320, thereby filling and blocking the valve seat passage.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0044] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liner-lined regulating valve, comprising a valve body (100), characterized in that, The valve body (100) includes a vertical section with the central opening facing upwards and a left channel and a right channel respectively connected to both sides of the vertical section. A first inner liner (102) is provided on the inner wall of the valve body (100), and a plurality of dovetail grooves (101) are provided on the inner wall of the valve body (100) to facilitate fixing the first inner liner (102). The upper and lower ends of the valve body (100) are open. A valve cover (110) is installed on the upper end of the valve body (100), and a bottom cover (120) is installed on the lower end of the valve body (100). A valve stem (200) is slidably inserted into the valve cover (110). A valve core (210) is fixedly sleeved at the lower part of the valve stem (200). A third inner liner (220) is provided on the outside of the valve stem (200) and the valve core (210). A plurality of casting holes (211) are provided on the top surface of the valve core (210) and communicate with the outside of the valve core (210). An annular groove (212) is opened on the outside of the valve core (210).

2. A liner-lined regulating valve according to claim 1, characterized in that, The left and right channels are parallel to each other, and the angle between the left and right channels and the horizontal plane is 26 degrees. One side of the outer wall of the valve body (100) corresponding to the left and right channels is perpendicular to the vertical section. The first inner liner (102) is provided with a valve seat for cooperating with the valve core (210) to realize the valve opening and closing.

3. A liner-lined regulating valve according to claim 2, characterized in that, The valve cover (110) is provided with a second inner liner (111) on the lower outer side, and a plurality of packing sealing rings (112) for sealing the gap are sleeved between the valve stem (200) and the valve cover (110).

4. A liner-lined regulating valve according to claim 2, characterized in that, A large gasket (121) for sealing is sandwiched between the bottom cover (120) and the valve body (100). A top rod (130) is vertically slidably inserted into the middle of the bottom cover (120). A bolt (131) for fixing the top rod (130) is installed on the bottom surface of the bottom cover (120). A small gasket (132) for sealing is sandwiched between the top rod (130) and the bolt (131).

5. A liner-lined regulating valve according to claim 4, characterized in that, The bottom surface of the valve core (210) is provided with a self-tightening mechanism (300), which includes a funnel plate (310) suspended away from the bottom end of the valve core (210), an annular plate (320) fixed on the bottom surface of the valve core (210), and a movable liquid bladder (330) fixed between the funnel plate (310) and the annular plate (320); a plurality of connecting rods (321) are fixedly connected between the funnel plate (310) and the annular plate (320).

6. A liner-lined regulating valve according to claim 5, characterized in that, The maximum outer diameter of the funnel plate (310) and the annular plate (320) is less than or equal to the outer diameter of the bottom surface of the valve core (210). The connecting rod (321) is always located inside the movable liquid bladder (330). The funnel plate (310) has a through hole in the middle for inserting the top rod (130).

7. A liner-lined regulating valve according to claim 6, characterized in that, The movable liquid bladder (330) is filled with liquid and the liquid volume is constant. A rod (331) is vertically inserted and fixed to the bottom of the movable liquid bladder (330). The lower end of the rod (331) extends out of the bottom of the movable liquid bladder (330). The top of the rod (331) is always slidably inserted into the bottom end of the valve stem (200). A circular protrusion is vertically opened on the outside of the rod (331). The top surface of the circular protrusion is fixedly attached to the bottom of the movable liquid bladder (330).

8. A liner-lined regulating valve according to claim 7, characterized in that, The valve stem (200), valve core (210), top rod (130), and insertion rod (331) are all coaxially arranged. When the valve stem (200) descends, the top rod (130) rises relative to it and inserts into the through hole of the funnel plate (310). The top rod (130) pushes the insertion rod (331) upward and squeezes the movable liquid bladder (330) upward. Then, the movable liquid bladder (330) expands in all directions through the gap between the funnel plate (310) and the annular plate (320).

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