Sealing device and conduit thereof

Abstract

The utility model discloses a sealing device which comprises a shell, a vacuumizing pipeline and a vacuum sealing piece, the shell is connected with the vacuumizing pipeline, and the vacuum sealing piece is arranged in the shell to control connection and disconnection of the shell and the vacuumizing pipeline. The shell internally comprises a first cavity and a second cavity, the first cavity is connected with the vacuumizing pipeline, and the vacuum sealing element can be clamped in the first cavity so as to control connection and disconnection of the first cavity and the vacuumizing pipeline; the second cavity communicates with the outside of the shell, a control piece is arranged in the second cavity, and the control piece controls movement of the vacuum sealing piece so as to control connection and disconnection of the first cavity and the vacuumizing pipeline. By arranging the sealing device connected with the vacuum layer of the catheter, after the control piece is controlled to close the vacuumizing channel, the catheter can keep the high-vacuum state of the vacuum layer in the working state without being externally connected with vacuumizing equipment in the surgical treatment process.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a sealing device and a catheter thereof. Background Art

[0002] Vacuum is a physical phenomenon that refers to a gaseous state within a given space at a pressure lower than atmospheric pressure. Vacuum technology is categorized by pressure level into low vacuum, medium vacuum, high vacuum, and ultra-high vacuum. Vacuum is widely used to reduce convection and conduction, thereby reducing heat transfer and improving thermal insulation performance.

[0003] Currently, cryotherapy catheters utilize a high vacuum environment to reduce heat transfer and improve insulation performance. This reduces refrigerant energy loss while preventing accidental frostbite for doctors or patients. Existing methods involve adding a layer of tubing outside the catheter's supply and discharge lumens and simultaneously working with vacuum equipment to create a high vacuum layer between the supply and discharge lumens and the external environment.

[0004] In existing technologies, catheter vacuuming is achieved by connecting a tube to a device equipped with a vacuum pump. During surgery, the vacuum pump in the device is constantly operating to maintain the vacuum in the catheter. This has the following major drawbacks: 1. The vacuum pump is constantly on, wasting energy; 2. It generates noise during surgery; and 3. The surgical catheter needs to wait for vacuuming. Furthermore, because the vacuum environment in the tube requires a connected device to maintain it, it is difficult to achieve the effect of maintaining vacuum even when the device is disconnected.

[0005] In view of this, the present invention hopes to provide a sealing device and a catheter thereof, which can efficiently and conveniently achieve sealing of the vacuum layer of the catheter to meet actual needs. Summary of the Invention

[0006] In order to overcome the above problems, the present invention proposes a sealing device and a catheter thereof, which facilitate the construction of a vacuum environment in the catheter for thermal insulation, and the vacuum pump can be disconnected during surgical treatment to ensure that the catheter maintains a high vacuum state when in operation.

[0007] The utility model provides a sealing device, comprising a shell, a vacuum pipeline and a vacuum seal. The shell is connected to the vacuum pipeline, and the vacuum seal is arranged in the shell to control the connection and disconnection between the shell and the vacuum pipeline. The shell comprises a first cavity and a second cavity. The first cavity is connected to the vacuum pipeline, and the vacuum seal can be clamped in the first cavity to control the connection and disconnection between the first cavity and the vacuum pipeline; the second cavity is communicated with the outside of the shell, and a control component is arranged in the second cavity. The control component controls the movement of the vacuum seal to control the connection and disconnection between the first cavity and the vacuum pipeline.

[0008] The sealing device further includes a push rod, the control member can control the movement of the push rod, the push rod includes a first end, and the first end of the push rod is fixedly connected to the vacuum sealing member. The control member controls the opening and closing of the first cavity and the vacuum pipeline by controlling the movement of the push rod.

[0009] Furthermore, a plurality of positioning clips are provided on the ejector pin, which limit the moving distance of the ejector pin so that the vacuum seal on the ejector pin tightly blocks the vacuum pumping pipeline, thereby achieving airtight isolation between the first cavity and the vacuum pumping pipeline.

[0010] Furthermore, the positioning card is provided with an elastic seal fixedly connected thereto, and the elastic seal moves with the push rod and is squeezed to isolate the second cavity from the first cavity, thereby achieving airtight isolation between the first cavity and the second cavity.

[0011] Furthermore, there are multiple elastic sealing members, at least two.

[0012] Furthermore, the elastic sealing member used to achieve sealed isolation between the first cavity and the second cavity is a bellows.

[0013] Furthermore, the control component is an eccentric wheel.

[0014] Furthermore, the control member is a screwable bolt.

[0015] Furthermore, the sealing device includes a pump connecting end, which is used to connect to an external vacuum pumping device, and the pump connecting end is provided with a joint fastener to fix the vacuum pumping device.

[0016] Furthermore, a sealing ring is provided between the joint fastener and the first cavity to achieve isolation and sealing between the first cavity and the outside world.

[0017] Furthermore, the utility model provides a catheter comprising a catheter body defining a proximal end and a distal end and a sealing device as described above; the sealing device is connected to the proximal end of the catheter body, and a vacuum line is connected to the vacuum layer of the catheter body.

[0018] Due to the adoption of the above technology, the utility model has the following positive effects compared with the prior art:

[0019] (1) The utility model provides a sealing device for the catheter to open or close the vacuum pipeline, so that the vacuum layer of the vacuum catheter remains in a vacuum state after the vacuum is exhausted. There is no need for external vacuum equipment to maintain the vacuum state, which reduces the surgical operation time and the noise during the use of the equipment. In addition, after the vacuum pipeline is sealed, the external vacuum equipment is disconnected, and the pressure difference on both sides of the vacuum seal causes the vacuum seal to be tightly blocked, thereby achieving a better sealing effect.

[0020] (2) The vacuum seal at the first end of the ejector pin is controlled by a control member. On the one hand, this can reduce the number of active components and simplify the structure. On the other hand, it can maintain the vacuum degree in the first cavity during operation, thereby ensuring the sealing during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0022] Figure 1 It is a schematic diagram of the connection between the sealing device and the catheter body of the utility model.

[0023] Figure 2 It is a cross-sectional view of the overall structure of the sealing device of the present invention.

[0024] Figure 3 It is a cross-sectional view of the overall structure of another embodiment of the sealing device of the present invention.

[0025] Figure 4 yes Figure 3 An enlarged view of a portion of the screw of the sealing device shown.

[0026] Figure 5 It is a cross-sectional view of another embodiment of the sealing device of the present invention.

[0027] Reference numerals: housing 1, vacuum line 2, vacuum seal 3, first cavity 11, second cavity 12, control component 13, ejector pin 14, positioning clamp 15, elastic seal 16, bellows 161, eccentric wheel 131, screw 132, joint fastener 17, sealing ring 18, sealing device 4, catheter body 5. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that in order to clearly and intuitively present the technical solution of the present invention, some components are omitted in the accompanying drawings. This is only for illustration and does not constitute a specific limitation of the present invention.

[0030] In the present invention, the proximal end refers to the end close to the operator, and the distal end refers to the end close to the patient. The proximal end and the distal end do not refer to specific components, but refer to relative positions.

[0031] like Figure 1-2 As shown, this embodiment provides a catheter, including a catheter body 5 and a sealing device 4 as described below; the sealing device 4 is connected to the proximal end of the catheter body 5, and the catheter vacuum layer pipeline and the external vacuum pumping equipment are connected through the sealing device 4 in this embodiment. Specifically, the vacuum pumping pipeline 2 is connected to the vacuum layer (not shown) of the catheter body 5, so that after the vacuum layer of the catheter is evacuated by the vacuum pumping equipment, the vacuum degree in the catheter can be maintained by the sealing device 4, and there is no need for an external vacuum pumping equipment to continuously evacuate the vacuum layer in the catheter.

[0032] Combine Figure 2 As shown, in some embodiments, the sealing device 4 includes a pump end A; the main function of the sealing device 4 is to isolate the external environment from the vacuum layer while maintaining the vacuum degree of the vacuum layer after the vacuum layer of the catheter reaches a preset vacuum degree, so as to maintain the vacuum degree of the vacuum layer.

[0033] The pump connecting end A of the sealing device 4 is provided with a joint fastener 17, and is connected to the pipeline of the external vacuum equipment to maintain sealing. When the vacuum equipment is working, it is sealed and connected to the external vacuum pipeline through the joint fastener 17, thereby improving the efficiency of vacuuming. After the sealing device 4 seals the vacuum pipeline 2, the vacuum layer part of the catheter can maintain the vacuum degree. At the same time, when the external vacuum equipment needs to be disassembled, the joint fastener 17 can facilitate disconnection from the external vacuum equipment.

[0034] Specifically, if Figure 2 As shown, the sealing device 4 includes a shell 1, a vacuum pipeline 2 and a vacuum seal 3. The shell 1 is connected to the vacuum pipeline 2, and the vacuum seal 3 is arranged in the shell 1 to control the connection and disconnection between the shell 1 and the vacuum pipeline 2.

[0035] The housing 1 further includes a first cavity 11 and a second cavity 12. The first cavity 11 is connected to the vacuum line 2, and a vacuum seal 3 is disposed within the first cavity 11 to control the connection between the first cavity 11 and the vacuum line 2. When the vacuum seal 3 does not close the vacuum line 2, the vacuum line 2 and the first cavity 11 are connected, and the vacuum level between the two is consistent. When the vacuum seal 3 closes the vacuum line 2, the vacuum line 2 and the first cavity 11 are disconnected, and the vacuum level in the vacuum layer connected to the vacuum line 2 is maintained. The vacuum seal 3 can be configured according to actual needs and can be configured as a sealing plug that can plug the vacuum line 2, or a seal that can cover the opening of the vacuum line 2.

[0036] The second cavity 12 is arranged in parallel with the first cavity 11, and the second cavity 12 is connected to the external air pressure of the shell 1. The control component 13 is at least partially arranged in the second cavity 12. The control component 13 controls the movement of the vacuum seal 3 to control the connection and disconnection of the first cavity 11 and the vacuum pipeline 2.

[0037] In some embodiments, the sealing device 4 further includes a push rod 14. The control member 13 can control the movement of the push rod 14. The push rod 14 includes a first end D, and the first end D of the push rod 14 is connected to the vacuum seal 3. The control member 13 controls the opening and closing of the first chamber 11 and the vacuum pipeline 2 by controlling the movement of the push rod 14.

[0038] In some embodiments, at least one positioning fixture 15 is fixedly provided on the top rod 14 . The positioning fixture 15 includes a limiting plate 151 and an elastic sealing member 16 fixed on the limiting plate 151 .

[0039] The limit plate 151 on the positioning clamp 15 limits the maximum movement distance of the push rod 14 so that the vacuum seal 3 on the push rod 14 can tightly plug the vacuum pipeline 2 to achieve relative isolation and sealing between the first cavity 11 and the vacuum pipeline 2. The limiting plate 151 can be arranged around the push rod 14 along the radial direction of the push rod 14. Combined with the figure, the push rod 14 is arranged to pass through the second cavity 12 and the first cavity 11. On the one hand, the positioning clamp 15 can limit the maximum movement distance of the push rod 14; on the other hand, during the movement of the push rod 14, since the control component 13 is partially arranged outside the second cavity 12, it is inevitable that the outside world and the second cavity 12 are connected with the air pressure, and the first cavity 11 is connected with the vacuum pipeline 2 or the vacuum equipment pipeline. Therefore, pressure leakage will occur between the second cavity 12 and the first cavity 11, which will destroy the vacuum degree in the first cavity 11. The multiple elastic seals 16 arranged on the positioning clamp 15 can seal the connection between the second cavity 12 and the first cavity 11 during the movement of the push rod 14, thereby ensuring the sealing of the first cavity 11.

[0040] Specifically, if Figure 2 In the embodiment shown, both ends of the push rod 14 pass through the first cavity 11 and the second cavity 12. Such a setting can improve the stability of the push rod 14, so that the push rod 14 can perform stable axial translation movement without offset and deformation during the movement. There are through-connections between the first cavity 11 and the second cavity 12 at both ends of the push rod 14, and positioning clips 15 and corresponding elastic seals 16 are provided at the through-connections to improve the stability of the push rod 14 and the sealing performance in the first cavity 11.

[0041] In some embodiments, the control member 13 is an eccentric wheel 131. The eccentric wheel 131 is a wheel-shaped part that can be mounted on a shaft, with the shaft hole offset to one side. When the shaft rotates, the outer edge of the eccentric wheel 131 pushes the push plate 141 on the push rod 14, causing the push rod 14 to translate in its axial direction. The movement of the push rod 14 can cause the vacuum seal 3 to close or open the vacuum line 2. The provision of the eccentric wheel 131 allows for a simple structural layout and efficient operation. To further facilitate operation and maintain the sealing within the housing 1, the shaft of the eccentric wheel 131 can be controlled by a control device disposed outside the housing 1. The control device can be coaxially connected to the eccentric wheel 131, and the rotation of the control device drives the rotation of the eccentric wheel 131. The control device can be a manual screw actuator or an electric actuator, such as a stepper motor.

[0042] When the vacuum layer of the catheter needs to be evacuated, the pump end A of the catheter's sealing device 4 is connected to the vacuum pump pipeline, acting on the control member 13, which drives the push rod 14 to move axially toward end A. The limit plate 151 limits the movement distance of the push rod 14, preventing the push rod 14 from blocking end A. The seal 16 set on the positioning clamp 15 is squeezed to isolate the first cavity 11 and the second cavity 12. At this time, the sealing plug 3 is opened, and the external vacuum equipment is connected to the vacuum pipeline 2. After starting the vacuum pump, the gas in the vacuum layer of the catheter is sucked out to form a vacuum layer;

[0043] When the required vacuum level is met, the control element 13 is acted upon in the opposite direction, causing the ejector pin 14 to move axially in the opposite direction. The vacuum seal 3 blocks the vacuum line 2, thereby closing the vacuum line 2. By providing a control element 13 capable of controlling the on / off of the vacuum line 2, the vacuum line 2 can be controlled to close after the vacuum layer of the vacuum conduit is completely evacuated, maintaining a vacuum state within the vacuum layer. This eliminates the need for external vacuum equipment to maintain the vacuum state, reducing surgical operation time and noise during equipment use.

[0044] Figure 3-4Another embodiment is shown, in which a screw 132 that can control the screwing in of the push rod 14 is used as the control member 13 of the previous embodiment. In conjunction with the figure, the push rod 14 can be set as an integral part with the screw 132, and the movement distance of the push rod 14 is controlled by the screwing in of the screw 132, so that the vacuum seal 3 located at the end of the push rod 14 can close or open the vacuum pipeline 2. When the screw 132 is screwed in, it controls the push rod 14 to close the vacuum pipeline 2, and when the screw 132 is screwed out, it controls the push rod 14 to open the vacuum pipeline 2. With this arrangement, the structure of the sealing device 4 is simpler and more operable. When it is necessary to evacuate air, the screw 132 is unscrewed. Since the push rod 14 is set as an integral part with the screw 132, the push rod 14 moves axially with the screw 132. After the sealing plug 3 does not block the vacuum channel 2, the vacuum channel 2 is connected to the first cavity 11, and the external vacuum equipment sucks the gas inside the conduit to form a vacuum layer. The seal 16 provided on the positioning card 15 is squeezed to isolate the first cavity 11 from the second cavity 12. In this embodiment, the push rod 14 can be integrally provided with the screw 132. When the vacuum degree requirement is met, the screw 132 is screwed in the opposite direction to control the movement of the push rod 14, so that the vacuum seal 3 blocks the vacuum line 2, thereby closing the vacuum line 2. By providing a vacuum line 2 that can be controlled on and off by the screw 132, the vacuum layer of the vacuum tube can be kept in a vacuum state after the vacuum is exhausted, and no external vacuum equipment is required to maintain the vacuum state, thereby reducing the surgical operation time and the noise during the use of the equipment. In this embodiment, since the push rod 14 and the screw 132 are integrally provided, the structure is simple, the operation is convenient, and the moving distance of the push rod 14 is easy to control.

[0045] Figure 5 Another embodiment is shown. Similarities to the first embodiment are not repeated here. The main differences are that the ejector pin unilaterally penetrates the first cavity 11 and the second cavity 12, and the elastic seal 16 is a bellows 161. The bellows 161 can deform to accommodate the movement of the ejector pin 14 and isolate and seal the first cavity 11 from the second cavity 12. This embodiment reduces pressure leakage between the first cavity 11 and the second cavity 12, thereby improving the sealing effect.

[0046] When vacuuming is required, the control part 13 is acted on, and the control part 13 drives the top rod 14 to make axial movement toward the end A shown in the figure. The bellows 161 provided on the positioning clamp 15 is squeezed and contracted to isolate the first cavity 11 and the second cavity 12. In this way, the external vacuum pumping equipment is connected to the vacuum pumping line 2, the sealing plug 3 is opened, and the external vacuum pumping equipment sucks the gas inside the conduit to form a vacuum layer; when the vacuum degree requirement is met, the control part 13 is acted on in the opposite direction, the top rod 14 moves in the opposite direction to the end A, and the bellows 161 is extended to isolate the first cavity 11 and the second cavity 12. The vacuum seal 3 blocks the vacuum pumping line 2, so that the vacuum seal 3 closes the vacuum pumping line 2. The setting of the bellows 161 can make the isolation between the first cavity 11 and the second cavity 12 tighter.

[0047] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the applications disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0048] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A sealing device comprising a housing, a vacuum line, and a vacuum seal, wherein the housing is connected to the vacuum line, and the vacuum seal is disposed in the housing to control the connection and disconnection between the housing and the vacuum line, characterized in that: The shell includes a first cavity and a second cavity, the first cavity is connected to the vacuum pipeline, and the vacuum seal is arranged in the first cavity to control the connection and disconnection of the first cavity and the vacuum pipeline; the second cavity is connected to the outside of the shell, and a control component is arranged in the second cavity, and the control component controls the movement of the vacuum seal to control the connection and disconnection of the first cavity and the vacuum pipeline.

2. The sealing device according to claim 1, wherein: The sealing device also includes a push rod, and the control member controls the movement of the push rod. The push rod includes a first end, and the first end of the push rod is connected to the vacuum sealing member. The control member controls the opening and closing of the first cavity and the vacuum pipeline by controlling the movement of the push rod.

3. The sealing device according to claim 2, wherein: At least one positioning card is provided on the push rod, and the positioning card limits the maximum movement distance of the push rod, ensuring that the vacuum seal on the push rod tightly plugs the vacuum pipeline, thereby achieving isolation and sealing between the first cavity and the vacuum pipeline.

4. The sealing device according to claim 3, wherein: The positioning clamp is provided with a limiting plate and an elastic sealing member fixed on the limiting plate. The elastic sealing member moves with the push rod and is squeezed to isolate the second cavity from the first cavity.

5. The sealing device according to claim 4, characterized in that The elastic sealing member is a bellows.

6. The sealing device according to claim 1, wherein: The control component is an eccentric wheel.

7. The sealing device according to claim 1, wherein: The control component is a screw that can be screwed in.

8. The sealing device according to claim 1, wherein: The sealing device includes a pump connecting end, which is used for connecting to an external vacuum pumping device. The pump connecting end is provided with a joint fastener to fix the vacuum pumping device.

9. The sealing device according to claim 8, wherein: A sealing ring is provided between the joint fastener and the first cavity to achieve isolation and sealing of the first cavity from the outside.

10. A catheter, characterized in that: The invention comprises a catheter body defining a proximal end and a distal end and a sealing device according to any one of claims 1 to 9; the sealing device is connected to the proximal end of the catheter body and communicates with the vacuum layer of the catheter body.

Images