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CN-121987122-A - Plug valve, plug for plug valve and manufacturing method thereof

CN121987122ACN 121987122 ACN121987122 ACN 121987122ACN-121987122-A

Abstract

The invention relates to a plug valve, a plug for the plug valve and a manufacturing method thereof. In order to flush away local bleeding during surgery with medical instruments, the instruments are usually provided with flushing devices. In order to be able to control the inflow and outflow of flushing liquid, the instrument is provided with a plug valve. In order to obtain the sealing effect of the plug valve, the plug of the plug valve must be provided very precisely. The known manufacturing process of such plugs is very complex and cost-intensive. The present invention provides a plug (19) for a plug valve (11) and a method for manufacturing a plug (19), thereby eliminating the problems. This is achieved in that the plug (19) is designed in one piece with the handle part (24) and the conical part (20) and can be produced in a single processing step.

Inventors

  • H mayer is executed

Assignees

  • 奥林匹斯冬季和IBE有限公司

Dates

Publication Date
20260508
Application Date
20220331
Priority Date
20210401

Claims (12)

  1. 1. Plug (19) for a plug valve (11) for producing and interrupting a fluid communication between at least two interface portions (21, 22), wherein the plug (19) is rotatably mounted in an interior cavity of a housing (18) of the plug valve (11) and comprises in succession in the direction of a rotation axis (25) a conical portion (20) having a conical surface (27) and a grip portion (24) having a grip (23), wherein the conical portion (20) has an aperture (26) perpendicularly to the rotation axis (25), and wherein the conical surface (27) has a plurality of webs (30, 31, 32) which can be sealingly engaged with an interior surface of the interior cavity of the housing (18), wherein the conical surface (27) has at least two horizontal webs (30, 31), which extend annularly around the conical portion (20), wherein one web (30) is arranged above the aperture (26), one web (31) is arranged below the aperture (26) and wherein the four webs (27) extend at least four vertically along the conical surface (28, 32) and wherein the four webs (26, 32) extend vertically along the aperture (26), the plug (19) is designed in one piece with the conical part (20) and the handle part (24), wherein the ends of the vertical webs (32) each coincide with a horizontal web (30, 31), the vertical webs (32) having a width which corresponds at least to the diameter of the hole (26).
  2. 2. Plug (19) for a plug valve (11) according to claim 1, characterized in that the conical portion (20), the handle portion (24) and the connecting strips (30, 31, 32) are made in one piece from the same material.
  3. 3. Plug (19) for a plug valve (11) according to claim 1, characterized in that at least the shape of the vertical bars (32) is provided with high precision by a pressing process.
  4. 4. Plug (19) for a plug valve (11) according to claim 1, characterized in that the taper (20) has a flow passage perpendicular to the rotation axis (25).
  5. 5. Plug (19) for a plug valve (11) according to claim 1, characterized in that, The tie bars (32) are arranged in a semi-circle around the aperture (26).
  6. 6. Plug (19) for a plug valve (11) according to claim 1, characterized in that the conical portion (20), the handle portion (24) and the connecting strips (30, 31, 32) are made in one piece from PEEK.
  7. 7. Plug (19) for a plug valve (11) according to claim 1, characterized in that the shape of all bars (30, 31, 32) is of high precision by means of a pressing process.
  8. 8. A plug valve (11) for creating and interrupting fluid communication between at least two interface portions (21, 22) of a medical hand-held device, the plug valve (11) having a plug (19) according to claim 1.
  9. 9. Plug valve (11) according to claim 8, characterized in that the medical hand-held device is an endoscope (10).
  10. 10. Method for producing a plug (19) for a plug valve (11) for producing and interrupting a fluid communication between at least two connection points (21, 22), wherein the plug (19) is rotatably mounted in accordance with claim 1 in an interior space of a housing (18) of the plug valve (11) and comprises, in succession in the direction of a rotation axis (25), a conical portion (20) having a conical surface (27) and a handle portion (24) having a handle (23), wherein the conical portion (20) has a bore (26) perpendicular to the rotation axis (25), and wherein the conical surface (27) has a plurality of webs (30, 31, 32) which can be brought into sealing engagement with an interior surface of the interior space of the housing (18), characterized in that the plug (19) is designed in one piece with the conical portion (20) and the handle portion (24), is of the type having the conical portion (20) and the handle portion (19) and is manufactured in one piece with the required precision of the webs (31, 32) and is obtained by injection molding and/or pressing the webs (31, 32) immediately thereafter, Wherein the injection molding of the plug (19) and the pressing of the webs (30, 31, 32) are performed in the same process, wherein the injection molded plug (19) is pressed in an injection molding device, wherein the webs (30, 31, 32) are flattened by the pressing, wherein the webs (30, 31, 32) are compressed to a desired accuracy.
  11. 11. The method according to claim 10, characterized in that the cone (20) has a flow passage perpendicular to the rotation axis (25).
  12. 12. Method according to claim 10, characterized in that the plug (19) with the conical portion (20) and the handle portion (24) is injection molded in one piece from PEEK.

Description

Plug valve, plug for plug valve and manufacturing method thereof The application is a divisional application of an application patent application (application date: 2022, 3, 31, title: plug valve, plug for plug valve and manufacturing method thereof) with the original application number 202210329357.9. Technical Field The invention relates to a plug for a plug valve. The invention also relates to a plug valve. Finally, the invention relates to a method for manufacturing a plug for a plug valve. Background Medical instruments such as endoscopes, for example, often have an elongated tubular shaft and a scope set that are used to examine the body lumen and for minimally invasive procedures. A pass-through instrument, such as a lithotomy basket, electrosurgical removal instrument, or forceps, is guided through the instrument shaft to the surgical site. In order to wash away the local bleeding that occurs during surgery and, for example, to protect the tissue from thermal damage caused by high frequency electrosurgical applications, the instrument is often provided with an irrigation device which circumferentially irrigates the tissue in front of the distal end of the shaft for a long period of time. Irrigation fluid may be directed through respective separate fluid flow passages through an inner tube or cannula of the instrument. In order to control the inflow and outflow of liquid, the liquid flow channel is typically provided with a stopcock at its proximal end. Corresponding plug valves are described, for example, in DE102014002158B4 and DE102016011184A 1. Plug valves generally consist of a housing and a plug rotatably mounted within the housing. The housing generally has a rectangular or cylindrical basic shape with an interior cavity. The lumen may be connected to a fluid flow path of the device, e.g. a supply line such as a pump, via two interface portions. The plug is rotatably fixed in an instrument which is designed in particular as a cone. The plug is formed by a conical portion with a conical surface, wherein the shape of the conical portion substantially corresponds to the shape of the inner cavity of the housing. The plug also has a handle portion with a handle. The plug is rotatable about the axis of rotation by a handle connected to the tapered portion. The cone is penetrated by a bore which runs generally perpendicular to the axis of rotation. The size and orientation of the holes corresponds to the openings of the two interface portions within the housing. By rotating the plug about the axis of rotation, the bore is caused to coincide with the openings of the two interface portions of the housing with its two openings, thereby forming a coherent passage through the plug valve. By a further corresponding rotation of the plug, the hole can be placed in a position in which the consecutive channel or flow passage is interrupted. In both positions, it is important for the functioning of the plug valve that fluid only flows through the channel, but not between the conical surface and the inner wall of the housing, or that no fluid flows through the plug valve. The tapered face of the plug has a plurality of ties for plug valve sealing or for fluid channeling. The webs are arranged as projections on the conical surface and have the property that they end in a seal with the inner wall of the housing. For this purpose, the conical section can be assigned two annular webs above and below the hole. The conical shape of the conical portion causes the annular webs to have different diameters. Alternatively, a plurality of vertical webs may be formed on the tapered surface and located laterally of the aperture opening and extending from one annular web to the other. To obtain the sealing action of the plug valve, the connecting strip must be provided or manufactured very precisely, which also requires a high material hardness for the corresponding durability. Typically, the plug is made of a wear resistant and dimensionally stable material such as PEEK, for example. To obtain the accuracy of the sealing surface, the PEEK material is turned. The PEEK semi-finished material or after the PEEK member or plug taper has been made in the injection molding process described above is turned. After the sealing surface of the conical portion has achieved a sufficiently high degree of precision by the turning process, the grip portion of the plug is glued to the conical portion of the plug in a further processing step. The multi-piece plug manufactured by multiple process steps must then be thoroughly cleaned. If the stopper is injection molded with the handle, it is necessary to place the injection molded stopper in another piece of equipment for finish turning after injection molding. A sufficiently high precision of the strip sealing surface is only obtained by a further processing step of finish turning. The manufacturing process of both plugs for plug valves as outlined herein is complex and cost intensive. Disclos