Valve opening and closing materials and direct-acting shut-off valves

Abstract

A valve opening / closing member and a direct-acting shutoff valve are provided with a valve flap, in which a valve body sealing gasket and a valve body sealing gasket fixing ring configured to fix the valve body sealing gasket to the valve flap are provided on one side of the valve flap in that order, the valve flap has a valve flap body, a male threaded post is provided concentrically below the valve flap body, the valve body sealing gasket fixing ring is provided with a female threaded hole to be screwed onto the male threaded post, and a sealing structure is provided on the side of the male threaded post away from the valve flap body, and the sealing structure prevents a medium from entering a gap between the male threaded post and the female threaded hole.

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application bearing application number 202310857048.3, filed with the China Patent Office on July 13, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of direct-acting shut-off valves, for example, to valve opening and closing members and direct-acting shut-off valves. [Background technology]

[0003] The direct-acting shut-off valve uses the pressure of the valve stem to bring the sealing surface of the valve flap into tight contact with the sealing surface of the valve seat, preventing the flow of media. It has the characteristics of small friction between the sealing surfaces during the opening and closing process, wear resistance, small opening height, and excellent manufacturing process performance. Direct-acting shut-off valves are most widely used in industrial fields, especially in sanitation and aseptic technology fields such as antibiotic production.

[0004] When a direct-type shutoff valve is applied to the antibiotic production process, the inside of the valve body must have low roughness, low dead zones, and no liquid accumulation, making the direct-type shutoff valve suitable for cleaning in place (CIP) and sanitizing in place (SIP).In the direct-type shutoff valves of the related art, the valve flap is connected to metal parts by threading or crimping to secure the valve body sealing gasket.However, when connected to metal parts in this manner, the gaps between the threaded joints and the radial gaps after crimping both become dead zones, and the medium flowing through the shutoff valve cannot flow out after entering these gaps, leading to liquid accumulation inside the valve body and making cleaning difficult, which affects the sanitary and aseptic process environment in the antibiotic production process. Summary of the Invention

[0005] This application provides a valve opening and closing material and a direct-acting shutoff valve that can solve the problem of a dead angle that exists when the valve flap of a direct-acting shutoff valve in the related art is connected to a metal part and the valve body sealing gasket is fixed, causing the medium to flow in and then not be able to flow out.

[0006] In one embodiment of the present application, there is provided a valve opening / closing member including a valve flap, wherein a valve body sealing gasket and a valve body sealing gasket fixing ring configured to fix the valve body sealing gasket to the valve flap are provided in this order on one side of the valve flap, The valve flap includes a valve flap body, a male threaded post is concentrically provided below the valve flap body, the valve body sealing gasket fixing ring is provided with a female threaded hole to be screwed onto the male threaded post, and a sealing structure is provided on the side of the male threaded post away from the valve flap body, and the sealing structure restricts the medium from entering the gap between the male threaded post and the female threaded hole, providing a valve opening and closing material.

[0007] In one embodiment, the sealing structure comprises a cylinder, and below the female threaded hole is a cylindrical hole, and the cylinder is connected to the cylindrical hole by an interference fit.

[0008] In one embodiment, the cylinder and the externally threaded post are integrally formed.

[0009] In one embodiment, the female threaded hole is configured as a blind hole to seal one end of the female threaded hole.

[0010] In one embodiment of the present application, there is further provided a direct-acting shutoff valve including a valve body, wherein the valve body is provided with two chambers which are in communication with the outside, each of the two chambers is provided with a branch passage, a shutoff cavity is provided at the communication point between the two chambers, and a valve port is provided at the communication point between the shutoff cavity and one of the chambers, a valve stem which extends to the outside of the valve body passes through and is slidably connected to the shutoff cavity, and one end of the valve stem which is located inside the valve body is fixedly connected to a valve flap body.

[0011] In one embodiment, an annular inclined flow path is provided around the valve port, and the annular inclined flow path is connected to a blocking cavity. Whether the valve flap body closes or opens the valve port, one of the chambers is always maintained in communication with the blocking cavity and is connected to the annular inclined flow path. Branch paths are provided in the two chambers, respectively, through which the medium flows out of and into the chambers. The inner bottom of the annular inclined flow path is inclined on one side from a higher side to a lower side.

[0012] In one embodiment, the two chambers and the external communication points of the valve body are respectively connected to external pipelines by welding.

[0013] In one embodiment, the communication points between the two chambers and the outside of the valve body are connected to external pipelines by sanitary flanges, and the sanitary flanges are fitted with O-shaped sealing rings via their concave and convex surfaces to seal the connection points between the valve body and the external pipelines.

[0014] In one embodiment, the valve body has an opening communicating with the cutoff cavity, a valve cover is sealingly connected to the opening via a sealing gasket, the valve cover has a valve neck communicating with the inside of the cutoff cavity, and the valve stem slides into the valve neck and is sealingly connected to it.

[0015] In one embodiment, the seal between the valve stem and the valve neck is a composite filler. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic side cross-sectional view of a sealing structure according to an embodiment of the present application; [Figure 2] 1 is a schematic side cross-sectional view of a direct-acting shutoff valve according to an embodiment of the present application; [Figure 3] FIG. 2 is a schematic side cross-sectional view of a second type of sealing structure according to an embodiment of the present application. [Figure 4] 1 is a schematic side cross-sectional view of the valve body sealing gasket fixing ring according to an embodiment of the present invention when not attached. FIG. [Figure 5]1 is a schematic plan view of an annular inclined flow channel according to an embodiment of the present application; [Figure 6] 1 is a side cross-sectional perspective structural schematic diagram of a direct-type shutoff valve according to an embodiment of the present application; [Figure 7] 1 is a perspective structural schematic diagram of a direct-type shutoff valve according to an embodiment of the present application; [Figure 8] 3 is a schematic diagram of a medium flow state when a direct-type shutoff valve according to an embodiment of the present application is opened; FIG. [Explanation of symbols]

[0017] The symbols in the figure represent the following: 1···Valve body, 2···Valve neck, 3···Valve cover, 4···Valve stem, 5···Valve body sealing gasket, 6···Valve body sealing gasket fixing ring, 7···Valve flap, 8···Chamber, 9···Blocking cavity, 10···Annular inclined flow path, 11···Branch path 701: Valve flap body, 702: Male threaded column, 703: Cylinder, 704: Female threaded hole, 705: Cylinder hole. DETAILED DESCRIPTION OF THE INVENTION

[0018] Example 1: As shown in Figures 1, 3 and 4, one embodiment of the present application provides a valve opening and closing material having a valve flap 7, in which a valve body sealing gasket 5 and a valve body sealing gasket fixing ring 6 configured to fix the valve body sealing gasket 5 to the valve flap 7 are provided in that order on one side of the valve flap 7.

[0019] The valve flap 7 comprises a valve flap body 701, a male threaded column 702 concentrically provided below the valve flap body 701, a female threaded hole 704 that is screwed onto the male threaded column 702 in the valve body sealing gasket fixing ring 6, and a sealing structure is provided on the side of the male threaded column 702 away from the valve flap body 701, which restricts the medium from entering the gap between the male threaded column 702 and the female threaded hole 704.

[0020] In this embodiment, the valve opening and closing member is specifically applied to a shutoff valve, for example, a direct-acting shutoff valve, and opens or closes the valve by the linear movement of the valve flap 7 inside the shutoff valve.

[0021] In the antibiotic production process, the direct shut-off valve is an important component, and in actual application, the requirements of the antibiotic production process require the interior of the valve to have low roughness, few dead corners, and no liquid accumulation. In this application, the valve disc sealing gasket fixing ring 6 is fixed to the valve flap body 701 by screwing the male threaded post 702 and the female threaded hole 704, so that the valve disc sealing gasket 5 is sandwiched and fixed between the valve flap body 701 and the valve disc sealing gasket fixing ring 6, and the end of the female threaded hole 704 is closed by a sealing structure, thereby preventing the medium flowing through the valve from entering the gap between the female threaded hole 704 and the male threaded post 702.

[0022] The sealing structure is configured to restrict the medium from flowing into the gap at the connection point between the female threaded hole 704 and the male threaded post 702, thereby preventing liquid from pooling inside the male threaded post 702 and the female threaded hole 704, reducing the difficulty of sterilizing and cleaning the inside of the valve, and ensuring a hygienic and aseptic process environment during the production process.

[0023] In the present application, the valve body sealing gasket fixing ring 6 is fixed by connecting the male threaded post 702 and the female threaded hole 704, and the valve body sealing gasket 5 is abutted against the valve flap 7, thereby achieving the sealing and fixing function. At the same time, the sealing structure in the present application prevents the medium from entering the gap between the male threaded post 702 and the female threaded hole 704, thereby preventing liquid from accumulating inside the valve body 1 and ensuring sanitary and aseptic processes in the production process.

[0024] In addition, the valve body sealing gasket 5 and the valve body sealing gasket fixing ring 6 come into contact to form a seal, which also restricts the medium flowing through the valve from flowing into the gap between the male threaded post 702 and the female threaded hole 704 from the side of the female threaded hole 704 that is closer to the valve body sealing gasket 5, thereby preventing liquid from pooling in the metal parts that fix the valve body sealing gasket 5 in the valve and ensuring a hygienic and aseptic process environment inside the valve during the antibiotic production process.

[0025] In this embodiment, the valve body sealing gasket 5 is configured to be moved by the valve flap body 701 to seal the passage through which the medium inside the valve flows, and by fixing the valve body sealing gasket fixing ring 6 to the valve flap body 701, the valve body sealing gasket 5 is sandwiched and fixed on both sides by the valve body sealing gasket fixing ring 6 and the valve flap body 701.

[0026] In this embodiment, the valve opening and closing material may also be applied to other mechanical components having valve flaps 7, thereby realizing blocking and sealing against the flowing medium in these mechanical components, thereby avoiding erosion of the corresponding area by the medium and the influence of the medium on the aseptic process due to accumulation of the medium.

[0027] The sealing structure includes a cylinder 703, and the valve body sealing gasket fixing ring 6 is further provided with a cylindrical hole 705, which is located below the female thread hole 704. The cylinder 703 and the cylindrical hole 705 are tightly connected to each other, thereby preventing the connection between the valve body sealing gasket fixing ring 6 and the valve flap 7 from loosening.

[0028] Since the surfaces of the cylinder 703 and the cylindrical hole 705 are smooth, a tight fit between the cylinder 703 and the cylindrical hole 705 provides a mechanical sealing effect, which prevents the medium flowing through the valve from entering the gap between the male threaded post 702 and the female threaded hole 704, preventing the medium in the valve from entering the gap between the male threaded post 702 and the female threaded hole 704 and causing liquid accumulation. This reduces the difficulty of sterilizing and cleaning the inside of the valve, and ensures a hygienic and aseptic process environment during production.

[0029] In addition, the cylinder 703 and the cylindrical hole 705 are connected by a tight fit, which acts to restrict the movement of the valve body sealing gasket fixing ring 6, thereby preventing loosening between the male threaded column 702 and the female threaded hole 704.

[0030] That is, in this embodiment, the main technical feature is that the sequential setting of the male threaded post 702 and the cylinder 703 and the tight fit connection between the cylinder 703 and the cylindrical hole 705 realize a mechanical seal for the cylindrical hole 705, and the abutment between the valve body sealing gasket 5 and the valve body sealing gasket fixing ring 6 realizes a seal for the other side of the female threaded hole 704, thereby restricting the medium passing through the valve from flowing into the gap between the male threaded post 702 and the female threaded hole 704, preventing liquid accumulation in the male threaded post 702 and the female threaded hole 704, reducing the difficulty of sterilizing and cleaning the inside of the valve, and ensuring a sanitary and aseptic process environment during production.

[0031] In this embodiment, the male threaded post 702 and the cylinder 703 may be integrally molded, or may be separately molded and then concentrically connected by welding or other means, as long as the male threaded post 702 and the female threaded hole 704 can be threadedly engaged, and the cylinder 703 and the cylindrical hole 705 can be tightly connected to achieve a mechanical sealing effect. Furthermore, the male threaded post 702 and the valve flap body 701 may also be integrally molded, or may be concentrically connected by welding or other means.

[0032] In one embodiment, the sealing structure may be an annular sealing ring provided at the end of the male threaded post 702 and a cylindrical hole 705 provided similarly, where the annular sealing ring is provided at the end of the male threaded post 702 and is in sliding contact with the inner wall of the cylindrical hole 705, thereby creating a sealing effect and preventing the medium from entering the gap between the female threaded hole 704 and the male threaded post 702. However, compared with the interference fit connection between the cylinder 703 and the cylindrical hole 705 in this embodiment, this technical aspect lacks the effect of preventing the connection between the male threaded post 702 and the female threaded hole 704 from loosening, while the above two technical aspects of this embodiment have a better effect.

[0033] The cylindrical column 703 and the male threaded column 702 are integrally molded, which makes the entire production process more convenient and the entire structure more stable.

[0034] On the other hand, by configuring the female threaded hole 704 as a blind hole, one end of the female threaded hole 704 is sealed, and the medium flowing inside the valve body 1 is restricted from entering the gap between the male threaded post 702 and the female threaded hole 704, preventing liquid accumulation inside the valve body 1 and ensuring sanitary and aseptic processes during the production process.

[0035] When the female threaded hole 704 is configured as a blind hole, one end of the female threaded hole 704 facing the valve flap body 701 is in a connected state, and the other end of the female threaded hole 704 away from the valve flap body 701 is in a closed state, thereby preventing the medium flowing through the inside of the valve from entering the female threaded hole 704 from the end of the female threaded hole 704 away from the valve flap body 701, creating a sealing effect at one end of the female threaded hole 704 and further avoiding the problem of liquid accumulation in the gap where the female threaded hole 704 and the male threaded post 702 are connected.

[0036] In addition, to ensure that the valve body sealing gasket 5 can be fixed to one side of the valve flap body 701 by the valve body sealing gasket fixing ring 6, the length of the male threaded post 702 should be smaller than the depth of the female threaded hole 704, thereby ensuring that the valve body sealing gasket fixing ring 6 and the valve flap body 701 are respectively abutted against the valve body sealing gasket 5.

[0037] Example 2: As shown in FIGS. 2 and 5 to 8 , an embodiment of the present application further provides a direct-acting shutoff valve including a valve body 1, in which two chambers 8 communicating with the outside are provided within the valve body 1, branch passages 11 are provided within the two chambers 8, a blocking cavity 9 is provided at the connection between the two chambers 8, and a valve port is provided at the connection between the blocking cavity 9 and one of the chambers 8, a valve stem 4 extending to the outside of the valve body 1 passes through and slides into the blocking cavity 9, and one end of the valve stem 4 located inside the valve body 1 is fixedly connected to a valve flap body 701.

[0038] In the actual use of antibiotic production, the two chambers 8 and the external communication points of the valve body 1 are connected to an external pipeline, and the valve shaft 4 is connected to an actuator mechanism, which may be electrically operated, air-operated, or manual.

[0039] When it is necessary to open the passage inside the valve body 1, the actuator mechanism drives the valve stem 4 to move upward, and the valve flap 7, valve body sealing gasket 5, and valve body sealing gasket fixing ring 6 move synchronously with the valve stem 4, causing the valve body sealing gasket 5 to disengage from the valve port at the communication point between the blocking cavity 9 and the chamber 8, thereby simultaneously connecting the blocking cavity 9 to both chambers 8, and allowing the medium to flow through the inside of the valve body 1.

[0040] When it is necessary to close the passage through which the medium flows inside the valve body 1, the actuator mechanism drives the valve stem 4 to move downward, so that the valve flap 7, valve disc sealing gasket 5 and valve disc sealing gasket fixing ring 6 move synchronously with the valve stem 4, and the valve disc sealing gasket 5 moves until it abuts against the outer wall of the valve port, forming a seal, thereby blocking the flow of the medium inside the valve body 1 and realizing the flow and cut-off of the medium inside the valve body 1.

[0041] In the present invention, the valve stem 4 moves the valve flap 7 and the valve body sealing gasket 5 up and down, so that the valve body sealing gasket 5 moves away from or presses against the communicating part between the chamber 8 and the cutoff cavity 9, thereby opening and closing the inside of the valve body 1.

[0042] By applying the valve flap 7 to this embodiment, when this embodiment is actually used, the existence of blind spots inside the direct-type shut-off valve is reduced, the existence of liquid accumulation on the valve flap 7 inside the direct-type shut-off valve is avoided, and the difficulty of sterilizing and cleaning the direct-type shut-off valve is reduced.

[0043] Since direct-acting shut-off valves are also used in the food, pharmaceutical, and chemical industries, the direct-acting shut-off valve of the present application can also be applied to these industries, and the use of the direct-acting shut-off valve needs to meet specific application requirements.

[0044] An annular inclined flow path 10 is provided around the valve port, and the annular inclined flow path 10 is connected to the blocking cavity 9. Whether the valve flap body 701 closes or opens the valve port, one of the chambers 8 is always maintained in communication with the blocking cavity 9 and is connected to the annular inclined flow path 10. Branch paths 11 are provided in the two chambers 8, respectively, through which the medium flows out of and into the chambers 8. The inner bottom of the annular inclined flow path 10 is inclined on one side from the higher side to the lower side.

[0045] The direct-type shutoff valve of the related art also has an annular passage inside, which is also located around the valve port, but the inner bottom of the annular passage in the related art is horizontal, that is, after the valve body 1 is installed, the valve stem 4 is in a vertical state, and the inner bottom of the annular passage in the related art is a horizontal plane.

[0046] On the other hand, in the present application, as shown in Figures 2 and 8, the blocking cavity 9 is always connected to the chamber 8 on the right side of the figure, and the chamber 8 on the left side of the figure is not connected to the blocking cavity 9 when the valve port is closed by the valve flap 7, and the annular inclined flow path 10 always maintains a state of communication with the chamber 8 on the right side of the figure.

[0047] 2 and 8, the direct-type shutoff valve of the present application is shown with the valve port in a closed state and an open state, respectively. As shown in Fig. 8, when the valve port of the present application is in an open state, the medium fills the inside of the valve body 1, flows through the two chambers 8 and the shutoff cavity 9, and passes through the valve body 1. At this time, the medium also fills the annular inclined flow path 10 located on the circumferential side of the valve port.

[0048] As shown in FIG. 2 , when the valve port in the present application is closed, the medium flows out of the interior of the valve body 1. However, the medium located in the annular inclined flow channel 10 flows into the chamber 8 connected to the annular inclined flow channel 10, i.e., into the right-hand chamber 8 in FIG. 2 . Because the bottom of the annular inclined flow channel 10 is inclined from high to low, the medium that enters the annular inclined flow channel 10 flows along the inner bottom of the annular inclined flow channel 10 due to its own gravity, passes through the connection between the annular inclined flow channel 10 and the left-hand chamber 8, enters the left-hand chamber 8, and then is discharged through the branch path 11 in the left-hand chamber 8. This prevents liquid from pooling in the annular inclined flow channel 10 and further reduces the possibility of liquid pooling in the valve body 1. This ensures a sanitary and aseptic environment inside the valve body 1 during the antibiotic production process. Condensed water and other substances in the chamber 8 may also flow out of the chamber 8 through the branch path 11.

[0049] Next, when it is necessary to sterilize the two chambers 8 and the inside of the blocking cavity 9, the medium necessary for sterilization, such as water vapor, may enter the inside of the chamber 8 through a position where the chamber 8 is connected to the outside, or may enter the inside of the chamber 8 through the branch path 11.

[0050] The two chambers 8 and the outside of the valve body 1 are connected to external pipelines by welding.

[0051] In the related art, the connection point between the outside of the valve body 1 of a direct-acting shutoff valve and the chamber 8 is generally made by a normal flange and sealed by a flat sealing gasket. However, the flat sealing gasket is not capable of precise positioning, and the sealing surface of a normal flange is rough, so that liquid pools will exist between the flanges after connection. In contrast, the present invention is connected to the external pipeline by welding, which eliminates the blind spots and sealing problems of the butt joint and prevents the existence of liquid pools.

[0052] The communication points between the two chambers 8 and the outside of the valve body 1 are further connected to external pipelines by sanitary flanges, and the sanitary flanges are combined with O-shaped sealing rings via their uneven surfaces to seal the connection points between the valve body 1 and the external pipelines.

[0053] As can be seen from the above, in the related art, the communication point between the outside of the valve body 1 and the chamber 8 of a direct-acting shut-off valve is generally connected by a normal flange and sealed by a flat sealing gasket. However, the flat sealing gasket is not capable of precise positioning, and the sealing surface of the normal flange is rough, so that liquid will remain between the flanges after connection. However, by using a sanitary flange connection and sealing with an O-type sealing ring, the blind spots that occur after connection and between the sealing gaskets can be greatly reduced.

[0054] The valve body 1 has an opening that communicates with the cutoff cavity 9, and the valve cover 3 is sealed and connected to the opening via a sealing gasket. The valve cover 3 has a valve neck 2 that communicates with the inside of the cutoff cavity 9, and the valve stem 4 slides into the valve neck 2 and is sealed and connected to it.

[0055] The opening in the valve body 1 is sealed by the valve cover 3 and the sealing gasket, which facilitates the movement of the valve stem 4, prevents the medium from leaking out, and ensures good sealing inside the valve body 1.

[0056] The gap between the valve stem 4 and the valve neck 2 is sealed with a composite filler, which ensures good sealing during the up and down movement of the valve stem 4 and prevents the medium from leaking out of the valve body 1 through the gap between the valve stem 4 and the valve neck 2.

Claims

1. A valve opening and closing member comprising a valve flap (7), a valve body sealing gasket (5) and a valve body sealing gasket fixing ring (6) configured to fix the valve body sealing gasket (5) to the valve flap (7) are provided in this order on one side of the valve flap (7); The valve flap (7) comprises a valve flap body (701), a male threaded post (702) concentrically provided below the valve flap body (701), the valve body sealing gasket fixing ring (6) is provided with a female threaded hole (704) to be screwed onto the male threaded post (702), and a sealing structure is provided on the side of the male threaded post (702) away from the valve flap body (701), and the sealing structure is configured to restrict the medium from entering a gap between the male threaded post (702) and the female threaded hole (704). Valve opening and closing material.

2. The sealing structure comprises a cylinder (703), and below the female screw hole (704) is a cylindrical hole (705), and the cylinder (703) is connected to the cylindrical hole (705) by interference fit. The valve opening and closing material according to claim 1.

3. The cylinder (703) and the male threaded column (702) are integrally formed. The valve opening and closing material according to claim 2.

4. The female threaded hole (704) is configured as a blind hole to seal one end of the female threaded hole (704). The valve opening and closing material according to claim 1.

5. A direct-acting shut-off valve comprising a valve body (1) including the valve opening and closing member according to any one of claims 1 to 4, The valve body (1) is provided with two chambers (8) communicating with the outside, each of the two chambers (8) is provided with a branch passage (11), a blocking cavity (9) is provided at the communication point between the two chambers (8), a valve port is provided at the communication point between the blocking cavity (9) and one of the chambers (8), a valve stem (4) extending to the outside of the valve body (1) is passed through the blocking cavity (9) and is slidably connected thereto, and one end of the valve stem (4) located inside the valve body (1) is fixedly connected to a valve flap main body (701). Direct-acting shut-off valve.

6. An annular inclined flow path (10) is provided around the valve port, and the annular inclined flow path (10) is connected to a blocking cavity (9). Even when the valve flap body (701) closes or opens the valve port, one of the chambers (8) is always maintained in communication with the blocking cavity (9) and is connected to the annular inclined flow path (10). Branch paths (11) are provided in the two chambers (8) through which the medium flows out of and into the chambers (8), respectively. The inner bottom of the annular inclined flow path (10) is inclined on one side from high to low.

6. The direct-acting shut-off valve of claim 5.

7. The two chambers (8) and the external communication points of the valve body (1) are connected to external pipelines by welding.

6. The direct-acting shut-off valve of claim 5.

8. The communication points between the two chambers (8) and the valve body (1) are connected to external pipelines by sanitary flanges, and the sanitary flanges, together with an O-shaped sealing ring via a concave-convex surface, seal the connection points between the valve body (1) and the external pipelines.

6. The direct-acting shut-off valve of claim 5.

9. The valve body (1) has an opening communicating with a cutoff cavity (9), a valve cover (3) is sealingly connected to the opening via a sealing gasket, the valve cover (3) has a valve neck (2) communicating with the inside of the cutoff cavity (9), and the valve stem (4) slides into the valve neck (2) and is sealingly connected thereto.

6. The direct-acting shut-off valve of claim 5.

10. The gap between the valve stem (4) and the valve neck (2) is sealed with a composite filler.

10. The direct-acting shut-off valve of claim 9.

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