Multi-caliber instrument sealing device

Abstract

The utility model relates to a multi-caliber instrument sealing device. At present, when instruments with different outer diameters are detected by a common structure adopting a single O-shaped ring, a lip-shaped sealing ring and the like, the compatibility is poor, the replacement efficiency is low, and the sealing ring is easy to extrude out and lose efficacy when encountering high-pressure fluid in the sealing process. The device comprises a device interface connected with equipment to be operated, and is characterized in that a conversion ring is arranged on the device interface, a detachable conversion part is arranged on the conversion ring, the conversion part comprises a detachable sealing ring, and the sealing ring is arranged on the conversion ring. And the sealing ring and the device interface are in interference fit to form end face sealing in the axial direction and the radial direction. Self-adaptive sealing within a certain diameter range can be achieved, and rapid replacement is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sealing device, especially a multi caliber instrument sealing device. BACKGROUND

[0002] In the medical operation scene: the instrument of different outer diameters needs to be used alternately in the minimally invasive surgery channel, the sealing structure is required to be automatically adapted when the instrument is switched, and gas or liquid leakage is avoided; in the industrial detection scene: the detection probe size difference is large in the pipeline flaw detection, equipment maintenance and other operations, and the dynamic sealing of the detection equipment and the pipeline needs to be ensured; in the scientific research experiment scene: different sensor probes need to be quickly replaced when the multi-parameter detection of precision instruments is carried out, and the sealing environment of the detection chamber is maintained at the same time.

[0003] In the above various practical application scenes, the commonly used scheme at present is to seal by using single O-ring, lip seal ring and the like, and the simple sealing structure has poor compatibility when facing the detection of instruments with different outer diameters, the replacement efficiency is low, and the sealing ring is easily extruded and fails in the sealing process of high-pressure fluid.

[0004] Therefore, the defects of the original technology are summarized as follows:

[0005] 1. The micro gap caused by the direct contact between the rigid instrument and the elastic sealing body leads to leakage;

[0006] 2. The elastic material bears non-uniform load, which easily leads to local plastic deformation, and the deformation is irreversible;

[0007] 3. The existing sealing structure lacks real-time feedback, and the locking force and the sealing requirement lack a balance point, and over-tightening leads to instrument damage, and over-looseness affects the sealing performance and causes leakage. INVENTION CONTENTS

[0008] In view of the problems existing in the prior art, the utility model provides a multi caliber instrument sealing device, which can realize self-adaptive sealing within a certain diameter range and is convenient and fast to replace.

[0009] The utility model takes the following technical scheme: a multi caliber instrument sealing device, including the device interface connected with the equipment to be operated, characterized by setting the conversion ring on the device interface, setting a detachable conversion component on the conversion ring, the conversion component includes a detachable sealing ring, and the sealing ring and the device interface are in interference fit to form end face sealing in the axial and radial directions.

[0010] As preferred, the sealing ring forms a large end sealing axial face and a large end sealing radial face at the inner end, and the device interface forms a matched large end axial face and a large end radial face.

[0011] Preferably, the conversion component comprises a conversion cover, and the outer end of the sealing ring is locked and connected with the small end interface member through a through hole on the conversion cover.

[0012] Preferably, the conversion cover is provided with a hinge shaft on both sides of the end, and the conversion ring is provided with a hinge hole matched with the hinge shaft.

[0013] Preferably, the conversion cover is snap connected with the device interface.

[0014] Preferably, an axial fixing buckle is formed on the inner end annular surface of the conversion ring.

[0015] Preferably, the conversion cover is snap connected with the device interface.

[0016] The utility model discloses the beneficial effect lies in: can realize 5-15mm continuous diameter range's self -adaptation seal, can maintain the constant sealing pressure when the instrument moves, ensures that the sealing performance attenuation is less than 10% after more than 1000 times circulation test. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the exploded view schematic diagram of the utility model.

[0018] Figure 2 It is the section view of the utility model.

[0019] Figure 3 It is the schematic diagram of the utility model after assembling and opening the conversion cover.

[0020] Figure 4 It is the schematic diagram of the utility model and closes the conversion cover.

[0021] In the drawing: 1, conversion sealing ring 11, instrument sealing mouth 12, big end sealing axial surface 13, big end sealing radial surface 2, conversion cover 21, hinge shaft 22, conversion cover radial positioning female buckle 23, conversion cover buckle 3, small end connecting port 4, conversion ring 41, hinge hole 42, axial fixing buckle 43, conversion ring buckle 5, device interface 51, big end connecting buckle 52, conversion cover radial positioning female buckle 53, big end axial surface 54, big end radial surface 55, connecting port. DETAILED DESCRIPTION

[0022] The utility model is further described below in combination with specific embodiments.

[0023] As Figures 1-2The multi-diameter instrument sealing device includes a device interface 5 connected with the equipment to be operated, a conversion ring 4 is arranged on the device interface, and a detachable conversion component is arranged on the conversion ring. The conversion component includes a detachable conversion sealing ring 1. The sealing ring and the device interface are in interference fit to form end face seals in the axial and radial directions. The core component of the sealing device is the conversion sealing ring. The conversion component can be adapted to install sealing rings of different diameters, and thus can adapt to equipment of different outer diameter openings to be operated.

[0024] In one embodiment, the sealing ring includes a large end sealing axial face 12 and a large end sealing radial face 13 formed at an inner end. The device interface includes a matching large end axial face 53 and a large end radial face 54. The matching end faces directly form an interference fit, effectively improving the sealing performance.

[0025] Specifically, the conversion component includes a conversion cover 2. The outer end of the sealing ring is locked and connected with a small end connecting port 3 through a through hole on the conversion cover. A convenient detachable connection structure such as screw connection can be used here to facilitate the replacement of sealing rings of different diameters.

[0026] In one embodiment, the conversion cover forms a hinge shaft 21 at both sides of the end. The conversion ring is provided with a hinge hole 41 matched with the hinge shaft. The hinge shaft 21 and the hinge hole 41 are designed to be detachable, which facilitates the replacement of the conversion sealing ring 1 of different diameters.

[0027] Specifically, the conversion cover is snap connected with the device interface. The conversion cover is provided with a conversion cover radial positioning male buckle 22 and a conversion cover snap buckle 23. The device interface is provided with a conversion cover radial positioning female buckle 52 at a corresponding position on the top.

[0028] In one embodiment, the conversion cover is further provided with a conversion cover snap buckle 23. The conversion ring is provided with a conversion ring snap buckle 43 matched with the conversion cover snap buckle, which ensures that the conversion ring and the conversion cover are tightly matched.

[0029] Specifically, the inner end annular face of the conversion ring 4 is provided with an axial fixing buckle 42. The conversion ring 4 is connected with the large end connecting buckle 51 of the sealing ring through the axial fixing buckle 42 and the large end connecting buckle 51.

[0030] As shown in Figure 3 and Figure 4 , the conversion component is divided into two states of opening and closing. In the closed state, the instrument enters from the instrument sealing port 11 to perform operation. In the open state, the conversion component can be replaced.

[0031] The bottom of the device interface is provided with a connecting port 55 connected with the equipment to be operated. The connecting port can be connected in various ways such as threads, welding, hot melting, and adhesive.

[0032] The core component of the utility model is conversion sealing ring 1, with conversion cover 2 assembly, utilize sealing ring small end connecting port 3 locking after as a whole conversion component. Conversion cover 2 and conversion ring 4 are connected through hinge shaft 21 and hinge hole 41, and hinge shaft 21 and hinge hole 41 adopt live matching port, are detachable design, and different caliber conversion sealing ring, conversion ring 4 and sealing ring big end connecting port 5 are connected through axial fixed buckle 42 and big end connecting buckle 51. Big end sealing axial surface 12, big end sealing radial surface 13 are respectively with the big end axial surface 53 on the device interface 5, big end radial surface 54 do interference fit and form the sealing of axial surface and end surface, effectively improve the sealing property.

[0033] The utility model overcomes the technical limitation of single diameter adaptation of prior art sealing device, realizes the continuous adjustable diameter while keeping the sealing reliability, reduces the frequency of accessory replacement when using multi-size instruments.

[0034] It should be understood that the embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the claims attached to the present application.

Claims

1. A multi-bore instrument sealing device comprising a device interface for connection to a device to be worked on, characterised in that The device interface is provided with a conversion ring, the conversion ring is provided with a detachable conversion component, the conversion component comprises a detachable sealing ring, and the sealing ring is in interference fit with the device interface to form end face seals in axial and radial directions.

2. A multi-orifice device sealing apparatus as defined in claim 1, wherein The sealing ring comprises a large end sealing axial face and a large end sealing radial face formed at an inner end, and the device interface is formed with a matched large end axial face and a large end radial face.

3. A multi-orifice device sealing apparatus as claimed in claim 1 or 2, wherein The conversion component comprises a conversion cover, and the outer end of the sealing ring passes through a through hole of the conversion cover and is locked and connected with a small end connecting port.

4. A multi-orifice device sealing apparatus as defined in claim 3, wherein The conversion cover is formed with hinge shafts at both sides of an end, and the conversion ring is provided with hinge holes matched with the hinge shafts.

5. A multi-orifice device sealing apparatus as defined in claim 4, wherein The conversion cover is in buckle connection with the device interface.

6. A multi-orifice device sealing apparatus as defined in claim 5, wherein An axial fixing buckle is formed on an inner end annular face of the conversion ring.

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