Fluid gear adjusting assembly, manufacturing method and cryosurgery device comprising fluid gear adjusting assembly

Abstract

The invention belongs to the field of medical instrument research / manufacturing, and particularly relates to a fluid gear adjusting assembly, a manufacturing method and a cryosurgery device comprising the fluid gear adjusting assembly. The adjusting assembly comprises fluid pipelines and opening control modules arranged on the fluid pipelines, the fluid pipelines are arranged on the base, the base is internally provided with two fluid pipelines, the initial positions of the first pipeline and the second pipeline are separated, and the tail ends of the first pipeline and the second pipeline are intersected; the opening degree control module comprises a straight pipe section located in the first pipeline or the second pipeline, a plugging block is arranged in the straight pipe section, the plugging block axially moves in the straight pipe section to change the size of the cross sectional area of the syn-position connecting pipeline at an inner wall connector of the straight pipe section, and then the air inlet flow is adjusted. Technicians in the field can realize stepless adjustment through non-positioning adjustment, and can also set a plugging block for limiting to perform multi-gear adjustment. The invention further provides a complete assembly manufacturing method and a cryosurgical device applying the assembly.

Description

Technical Field

[0001] This application belongs to the field of medical device research / manufacturing, specifically relating to a fluid level adjustment component, a manufacturing method thereof, and a cryosurgery device including the component. Background Technology

[0002] Cryosurgery is a medical device that uses ultra-low temperature technology to treat local tissues. It rapidly lowers the treatment head (probe) to an ultra-low temperature of less than -40°C, causing ice crystals to form inside and outside cells, destroying cell structure and inducing tissue apoptosis.

[0003] The assembly system includes a handheld cryosurgery device, a refrigerant generator, and connecting tubing. The temperature range of the cryosurgery probe tip is controlled by adjusting the refrigerant flow rate / velocity to suit different conditions.

[0004] Some prior art uses cryogenic solenoid valves connected to the internal tubing of a cryosurgery device for control (see CN207220873U, CN216021343U), and other prior art also discloses a technical solution in which "the flow limiting element includes a constriction portion fluidly inserted between the fluid discharge conduit and the discharge line (see CN 112566571 A)".

[0005] The procurement cost of cryogenic solenoid valves is relatively high, and during the refrigerant exchange process in cryosurgery devices, water vapor condensation often occurs on the pipe walls, making it impossible to guarantee long-term dryness inside the refrigeration device, which can easily lead to corrosion of components.

[0006] In CN 112566571 A, the size of the contraction section is fixed and there is no valve. The generated back pressure is a function of the flow rate, where a higher flow rate results in a greater back pressure. The cross-sectional area of ​​the contraction section is controlled by the back pressure. This regulation is more focused on a balancing approach, aiming to maintain the balance of the pipeline. Summary of the Invention

[0007] Technical problem: The technical problem to be solved by this application is to provide a refrigerant flow regulation structure, which splits the inlet and outlet pipes inside the refrigeration unit, sets a movable blocking block on the inlet pipe, and achieves flow regulation by adjusting the size of the inlet cross section by moving the blocking block.

[0008] Technical solution: A fluid level adjustment component, including a fluid pipeline and an opening control module disposed on the fluid pipeline, characterized in that the fluid pipeline is disposed on a base, and two fluid pipelines are disposed inside the base, the starting ends and the ending ends of the first pipeline and the second pipeline are connected to different positions on the side wall of the base and pass through as a connection port.

[0009] The first and second pipelines start separately and converge at their ends; the base is made of a material with good thermal insulation, high strength, and easy processing, such as high-density polyurethane; CNC drilling with a stepped drill bit, tolerance <0.05mm; the channel is coated with medical epoxy resin to repair the surface carbonization of the hole diameter and improve airtightness (3M DP100NS, airtightness <10⁻). 8 mbar·L / s).

[0010] The opening control module includes a straight pipe section located in the first or second pipeline, and a blocking block located within the straight pipe section that can move axially along the straight pipe section. A sequential connecting section of the straight pipe section is connected to the inner wall of the straight pipe section. The axial movement of the blocking block within the straight pipe section changes the cross-sectional area of ​​the sequential connecting section's interface on the inner wall of the straight pipe section, thereby adjusting the air intake flow rate. Those skilled in the art can achieve stepless adjustment through non-positioning adjustment, or set a limit on the blocking block for multi-level adjustment.

[0011] In existing dual-pipe structures, air is usually introduced through an inner pipe and discharged through an outer pipe. Flow control requires controlling the intake volume. Therefore, after the two pipes are split within the base, it is easier to set up an opening control structure on a single pipe.

[0012] Furthermore, the starting axes of the first and second pipes are located at different positions on the first plane of the base; the central axes of the middle sections of the first and second pipes are located at different positions on the second plane of the base; the ending sections of the first and second pipes are located at different positions on the third plane of the base, and the central axes of the sections near the ends of the first and second pipes coincide in the third plane. Pipe sections with their central axes in the same plane facilitate the programming and calculation of the hole location, reduce the difficulty of hole drilling, and allow those skilled in the art to set consistent orientation angles within the same plane during drilling operations, enhancing uniformity and standardization. It should be noted that, in the following text, whenever a "segment" of pipe is mentioned in a certain plane, it refers to its center / central axis being in that plane.

[0013] Furthermore, the portions of the first and third planes within the base do not intersect, while the portions of the second and first planes, and the portions of the second and third planes within the base, all intersect. That is, the pipeline enters the base from the first plane, extends to the second plane, then perpendicularly enters the third plane from the second plane, and finally extends out of the base on the third plane.

[0014] A special configuration: For ease of processing, the first plane can be set to be parallel to the third plane, and the second plane can be set to be perpendicular to the first / third plane (hereinafter, the positional relationship of these three planes will be referred to as "special configuration"). This special configuration of the planes can arrange a single hole-making method, such as making it easier to open mold injection molding or casting molding.

[0015] Furthermore, the first conduit includes a first segment, a second segment, a third segment, a fourth segment, a fifth segment, and a sixth segment connected sequentially. The first segment is located near the outer contour of the base as a front opening. The first segment and the second segment are located within a first plane and are coaxially connected or at an angle to each other. The angled arrangement is because the space within the base is limited, and the connection between the first segment and the second segment is to create an inflection point so that the front opening is located at the required position on the base. In the initial stage, simply opening one segment of the conduit on the side wall of the base as a front opening is considered equivalent to coaxially connecting the first segment and the second segment.

[0016] The third segment forms an angle with the second segment, which is the angle between the third end and the first plane, and the third segment is located in the second plane; if the pipeline position is determined by a specially set planar relationship, that is, the second segment and the third segment are perpendicular to each other.

[0017] The fourth, fifth, and sixth segments are sequentially connected and located within the third plane; the openings are sequential, with the later (meaning the opening sequence is later) opening usually needing to extend to the earlier (meaning the opening sequence is earlier) opening. In order to minimize the damage to the existing pipelines of the earlier opening during the later opening process, the fourth, fifth, and sixth segments of the pipeline are vertically connected in sequence.

[0018] The plugging block is located in the fourth section, which has an opening in its sidewall near its front end, extending along the opening to form the fifth section. The plugging block adjusts the airflow by axially moving to block the opening size of the fifth section in the sidewall of the fourth section, thereby changing the air intake cross-section.

[0019] Furthermore, the second pipeline includes segments a, b, c, d, e, and f connected in sequence. Segment a is located at the outer contour of the base as the front opening. Segment a is close to the first segment. Segments a and b are both within the first plane. Similarly, the connection between segments a and b is to set an inflection point to accommodate the limited space of the base. Setting only one segment of the pipeline on the side wall of the base as the front opening of the air outlet is equivalent to connecting segments a and b coaxially.

[0020] Segment c lies within the second plane; segment c is parallel to the third segment. This simplifies the machining process.

[0021] The part near the end of section f overlaps with the sixth section. The sixth section is an inner tube with a smaller outer diameter than section f, which is set inside section f. Supporting partitions and sealing rings are set around the inner tube to prevent gas cross-flow. The supporting partitions are also made of heat-insulating material.

[0022] Furthermore, it also includes a drive mechanism, which is used to drive the movement of the sealing block in the fourth section. The drive mechanism can be driven by one or more of the following methods: electromagnetic drive, gear and rack motor drive, and lever pressing drive. This drive method drives the movement of the sealing block to achieve sealing adjustment. The structure is simple and highly reliable. Unlike the existing technology that directly uses a solenoid valve for flow regulation, which makes the solenoid valve directly contact the refrigerant, it not only requires a specific low-temperature solenoid valve, but also makes it easy for condensation to form on the periphery and part of the internal cavity of the solenoid valve, which can easily lead to component failure.

[0023] Furthermore, the fifth section of the pipeline is a grooved pipeline, with the grooves running along the same direction as the fourth section. That is, the groove direction of the grooved holes is consistent with the movement direction of the sealing block, which increases the refrigerant's adjustment stroke and thus the adjustment range.

[0024] Furthermore, the driving mechanism is a lever pressing driving mechanism, with the fourth end extending axially to and through the side wall of the base. The sealing block includes a sealing head located at the inner end and a guide connecting rod connected to the sealing head, with the guide connecting rod extending to the outside of the base.

[0025] A fixed support base is provided below the guide rod, and the two hinged joints of the press handle are respectively hinged to the support base and the end of the guide connecting rod. It should be noted that the pin hole and pin connection at the junction of the guide rod and / or support rod and the press handle should adopt a clearance fit to avoid mechanical interference that may affect the linear movement of the guide rod during pressing.

[0026] Furthermore, the lever pressing drive mechanism also includes a spring-back mechanism for resetting the sealing head. The spring-back mechanism can be located at the lower end of the handle and can be adjusted in multiple temporary stops.

[0027] This application also provides a method for manufacturing a fluid level adjustment component, the method comprising the following steps:

[0028] S1: Make a base with two symmetrical planes, the two parallel planes being the top and bottom planes respectively, and use the center plane of symmetry between the top and bottom planes as the third plane; for ease of construction, the top and bottom planes can be made parallel to each other.

[0029] S2: On the third plane, a first through hole and a second through hole are made in the vertical direction along two center lines. The depth of the second through hole is greater than that of the first through hole, or both the first and second through holes penetrate the base.

[0030] S3: The third and fourth through holes are opened in a manner that is interconnected with the first and second through holes. In order to simplify the processing procedure, the third / fourth through hole can be perpendicular to the first / second through hole, and a fifth through hole is opened below the fourth through hole and interconnected with the second through hole. The fifth through hole starts from the right side wall of the base and connects to the second through hole.

[0031] An inner pipe with a diameter smaller than that of the third through hole is installed inside the third through hole and connected to the first through hole. The passage of the third through hole outside the inner pipe is blocked at the front end of the first through hole and is not connected to the second through hole; that is, the inner pipe is connected to the first through hole.

[0032] S4: A sixth through hole is made at a point near the front end of the fourth through hole, pointing towards the top surface, to extend to the top surface; when making the hole, it can be made from the top surface downwards to extend to the fourth through hole;

[0033] A seventh through hole is made at another point on the top surface near the front end of the fifth through hole, extending to the top surface; similarly, a hole is made from the top surface downwards.

[0034] S5: An eighth through hole is opened on any side wall of the base to connect to the sixth through hole and a ninth through hole is opened to connect to the seventh through hole, wherein the eighth through hole and the ninth through hole serve as the starting ends of the first pipeline and the second pipeline, respectively.

[0035] Furthermore, S5 also includes opening a tenth through hole connecting to the eighth through hole and an eleventh through hole connecting to the ninth through hole on the same side wall of the base;

[0036] The tenth and eleventh through holes serve as the starting ends of the first and second pipelines, respectively, while the inner and outer pipes at the rear end of the third through hole serve as the ends of the first and second pipelines, respectively.

[0037] Furthermore, to facilitate processing, all openings on the base are through holes that penetrate at least one side of the base. Therefore, except for the inlet and outlet air initiation and end points, all other openings need to be sealed. In addition, when connecting the inner tube and guide rod components, sealing treatment is required around them. Therefore, the opening method is mostly multi-segment holes (multi-stage openings / stepped holes).

[0038] For example, in S3, both the third and fourth through holes are opposite openings, where:

[0039] The third through hole is opened in a three-stage manner on one side, and the opening depth satisfies the requirement that the diameter of the second stage (the smallest inner diameter hole in each hole is the first stage, and they are ordered in ascending order) exceeds the diameter of the first through hole.

[0040] The second opening of the third through hole facilitates the use of a support and sealing component for the inner tube. The sealing ring is placed at the first through hole, which can effectively position the support and sealing component, sealing ring, and other parts.

[0041] The other side has a three-stage opening method. The opening depth meets the requirement that the first stage opening extends from the side wall of the second through hole to the opposite opening, and the second stage opening extends to the side wall of the second through hole. That is, the inner tube and outer cavity of the second through hole and the third through hole are connected. When used in cryosurgery devices, it serves as an air outlet.

[0042] The fourth through hole has a 5-stage opening on the left side, with its third stage opening extending beyond the first through hole; the other side has a 3-stage opening, with its first stage opening extending to the opposite opening.

[0043] Furthermore, the third-order opening of the fourth through hole is perpendicularly connected to the first through hole;

[0044] The sealing block is installed in the third-order through hole of the fourth through hole;

[0045] The first through hole is a slotted hole, with the slotting direction perpendicular to the radial direction of the fourth through hole. That is, the first and fourth through holes connect to form a section of the intake pipe, and flow rate is adjusted by regulating the sealing block.

[0046] Furthermore, the sealing block is connected to a guide rod, which is axially driven by one or more of the following methods: electromagnetic drive, rack and pinion motor drive, and lever pressing drive.

[0047] Furthermore, one end of the guide rod is connected to the sealing block, and the other end extends out of the fourth through hole and is hinged to the press handle.

[0048] Furthermore, a stop valve is installed on one side of the fourth through hole;

[0049] The sealing valve is embedded at the front end of the fourth through hole;

[0050] The stop valve can rotate relative to the fourth through hole;

[0051] The sealing valve has a radial connecting hole along the radial direction, and the radial connecting hole can be rotated to be coaxial with the sixth through hole;

[0052] The sealing valve also has an axial connecting hole along the axial direction, which is in the same direction as the cavity where the fourth through hole is located and is opposite to the sealing block.

[0053] The outer side of the stop valve is marked with a rotational position indicator. This indicator is formed by aligning a reference mark on the side wall of the base with an alignment mark on the outer wall of the stop valve. The reference mark / alignment mark can be a raised area, a groove, a distinguishing color, or a pointer, or a combination of these features. By turning the stop valve, the connection between the radial connecting hole and the sixth through hole on the stop valve is disrupted, completely preventing gas from entering and shutting down the system.

[0054] Furthermore, the first through hole to the eleventh through hole all adopt a multi-stage opening method, and the sealing element, connector and plug are set at the intersection of the multi-stage.

[0055] This application also provides a cryosurgery device, including a fluid level adjustment assembly manufactured using the above method. A cryosurgery probe is connected to the end of a third through-hole. The inlet pipe of the cryosurgery probe is connected to an inner tube, and the outlet pipe is connected to the third through-hole. The inlet pipe is connected to the end of a tenth through-hole, and the outlet pipe is connected to the end of an eleventh pipe. The overall shape of the cryosurgery device is similar to a gun, with the base located inside the housing. A stop valve extends or is mechanically connected to the outside of the housing for operation.

[0056] The beneficial effects of this application are as follows:

[0057] 1. This application uses an opening within a solid base to separate the inlet and outlet airflows, and employs a movable sealing block on the inlet pipe to regulate the gas flow rate using a mechanical structure, thereby improving regulation stability and reliability. Those skilled in the art can achieve stepless regulation through non-positioning adjustment, or set a limit on the sealing block for multi-level adjustment;

[0058] The integrity of the base structure itself can also accommodate the passage of high-pressure gas, and the heat insulation material can effectively reduce the generation of condensate in the surrounding cavity.

[0059] 2. The base is made of heat-insulating high-strength material to meet low-temperature mechanical performance requirements. The opening surface is made with a hole-making process to achieve the required flatness / tolerance. Furthermore, epoxy resin and other materials can be coated on the surface to repair any damage to the opening.

[0060] 3. The third through hole is opened to the center surface of the support of the base, so that its end position is centered. After the probe is installed, the probe position is also in the center of the cryosurgery device, which makes it easier to operate during surgery.

[0061] 4. The "special setting" positional relationship of the first, second, and third planes simplifies the hole-making process, effectively improving processing efficiency and reducing costs. The purpose of choosing a double-layer hole design on the first and third planes is to avoid mechanical interference with the connecting pipes when installing the push-button handle. In experiments, it was found that single-layer dense hole design leads to damage to the base structure, and its yield rate is significantly lower than that of double-layer hole design, achieving unexpected technical results.

[0062] 5. Interconnected through holes are mostly vertically connected, which can effectively reduce the damage to the diameter of the holes opened earlier by the later ones and facilitate sealing during assembly.

[0063] 6. Setting inflection points on the base optimizes the layout of pipelines on the base, maximizing the utilization efficiency of the base space structure.

[0064] 7. The sealing block is set in the fourth through hole of the base, and the guide rod is also set in the fourth through hole of the base, realizing multiple uses of one hole and avoiding the cost loss caused by repeated drilling.

[0065] 8. The guide rod can be steplessly adjusted by smooth drive, or it can be adjusted in multiple positions by setting temporary limit points.

[0066] 9. The slotted hole design can increase the adjustment stroke and expand the adjustment range.

[0067] 10. This application also provides a complete set of base fabrication and hole-making methods, which give full play to the advantages of high hole-making precision to achieve precise airflow pipelines.

[0068] 11. The use of multi-segment holes (multi-stage openings / stepped openings) facilitates the installation of sealing components, sealing supports, and sealing rings.

[0069] 12. The anti-sealing valve enables the switching of opening and closing of the cryosurgery device. Attached Figure Description

[0070] Figure 1 This is a front view schematic diagram of the base in Embodiment 1 of this application;

[0071] Figure 2 This is a left view of the base in Embodiment 1 of this application;

[0072] Figure 3 This is a right-side view of the base in Embodiment 1 of this application.

[0073] Figure 4 for Figure 1 A sectional view of surface AA, with the sectional plane being the second plane of the base;

[0074] Figure 5 for Figure 2 A sectional view of the BB surface, with the sectional plane being the first plane of the base;

[0075] Figure 6 This is a sectional view of the CC plane, with the sectional plane being the third plane of the base;

[0076] Figure 7 This is a schematic diagram of the pipeline in the base in Embodiment 1 of this application. The red part in the figure is the first pipeline (air inlet pipeline), and the green part is the second pipeline (air outlet pipeline).

[0077] Figure 8 This is a three-dimensional schematic diagram of the base in Embodiment 1 of this application;

[0078] Figure 9 This is a schematic diagram of the third planar cross-section of Embodiment 1 of this application, and a schematic diagram of the sealing valve;

[0079] Figure 10 , 11 This is a perspective view of Embodiment 1 of this application;

[0080] Figure 12 This is a schematic diagram of the initial state of opening adjustment in Embodiment 1 of this application;

[0081] Figure 13 This is a schematic diagram of the opening adjustment at level 1 in Embodiment 1 of this application;

[0082] Figure 14 This is a schematic diagram of the opening adjustment at two levels in Embodiment 1 of this application;

[0083] Figure 15-18 Corresponding to Figure 12-15 This is a schematic diagram of the gear locking structure during the gear shifting process in Embodiment 1 of this application;

[0084] Figure 18 This is a cross-sectional schematic diagram of Embodiment 3 of this application.

[0085] In the diagram: 1. Intake pipe; 2. Exit pipe; 3. First through hole; 4. Second through hole; 5. Third left through hole; 6. Third right through hole; 7. Fourth left through hole; 8. Fourth right through hole; 9. Fifth through hole; 10. Sixth through hole; 11. Seventh through hole; 12. Eighth through hole; 13. Ninth through hole; 14. Tenth through hole; 15. Eleventh through hole; 16. Plug; 17. Sealing block; 18. Sealing ring; 19. Inner pipe; 20. Supporting sealing component; 21. Support component; 22. Stop valve; 23. Intermediate through hole 24. Hole; 25. Connecting hole; 26. One-way valve; 27. Alignment mark; 28. Sealing block; 29. ​​Guide rod; 30. Support rod; 31. First hinge hole; 32. Second hinge hole; 33. Return valve; 34. Return cavity; 35. Radial opening; 36. Axial hole; 37. Press handle; 38. Support part; 39. Slide rail; 40. Groove; 41. Barb; 42. Push block; 43. Stop block; 44. Spring pressing block; 45. Slide rail tension spring; 46. Housing; 47. Cryogenic probe. Detailed Implementation

[0086] Example 1:

[0087] A fluid level adjustment component, namely a refrigerant pressure relief valve adjustment component for cryosurgery devices.

[0088] Combined with appendix Figure 1-18 To provide a detailed description of its structure, it should be noted that the terms "up," "down," "left," and "right" are used in this article. Figure 1 The orientation shown is for reference only; the top surface mentioned in this article is... Figure 1 The front view in the image has a bottom surface that is opposite to the top surface.

[0089] Reference Figure 8The base is a blocky entity with two parallel top and bottom surfaces. Its lower left and right corners are partially removed to varying degrees, and the top and bottom surfaces at the lower left corner are symmetrically removed to adapt to the shape of the shell 46 of the cryosurgery device.

[0090] Its internal opening structure is roughly as follows Figure 8 The red and green dotted lines inside indicate that the green part is the air intake pipe 1 and the red part is the air outlet pipe 2, which correspond to the first pipe and the second pipe mentioned above, respectively.

[0091] The following section provides a detailed description of the opening, referring to the sectional views of three planes.

[0092] Third plane:

[0093] Reference Figure 6 The plane is located at the center of symmetry between the top and bottom surfaces of the base. A first through hole 3 and a second through hole 4 are opened parallel to each other along its top and downward. The drilling depth of the second through hole 4 is greater than that of the first through hole 3. The inner diameter of the first through hole 3 is smaller, which makes it easier to increase the flow rate of the refrigerant intake.

[0094] Third through hole: A third left-facing through hole 5 with multiple segments (steps) is opened on the left side (the Nth step through hole of the specific pipeline mentioned below is assumed to be a multi-step opening), with the drilling depth exceeding the first through hole 3. A third left-facing through hole 5 is opened on the right side coaxial with the third right-facing through hole 6. Its first step drilling extends to the bottom of the third right-facing through hole 6. The third step through hole of the third right-facing through hole 6 is intersected and connected with the first through hole 3.

[0095] Fourth through hole: A fourth left through hole 7 is opened below the third left opening. Its third-order through hole extends beyond the end of the first through hole 3 and is connected to the first through hole 3. A fourth right opening is opened on the right side, coaxial with the fourth left through hole 7. Its first-order through hole extends to the bottom of the fourth left through hole 7.

[0096] Fifth through hole 9: A fifth through hole 9 is opened below the fourth right-facing through hole 8 on the right side, extending through to the side wall of the second through hole 4.

[0097] Second plane:

[0098] Reference Figure 4 A sixth through hole 10 is vertically downward on the top surface near the front end of the fourth left through hole 7, and is perpendicular to the fourth left through hole 7; a seventh through hole 11 is vertically downward on the top surface near the end of the fifth through hole 9, and is perpendicular to the fifth through hole 9.

[0099] First plane:

[0100] Reference Figure 5 An eighth through hole 12 is obliquely opened from the left side wall of the base, passing through the sixth through hole 10; a ninth through hole 13 is obliquely opened from the lower right side wall of the base, connecting to the seventh through hole 11;

[0101] A tenth through hole 14 is made from the lower left corner of the cut surface sidewall of the base, extending through to the eighth through hole 12. An eleventh through hole 15 is made to the right of the tenth through hole 14, extending through to the ninth through hole 13.

[0102] All holes are now open. Figure 12-18 The other circular holes on the base shown above are mounting holes for mounting the base to the housing 46. They will not be described in detail here. Those skilled in the art can refer to the existing mounting methods of the entity in the housing 46 for implementation.

[0103] Reference Figure 7 After the hole is opened, the air inlet and outlet pipes 2 formed are the green part and the red part, respectively.

[0104] Reference for component installation within the base Figure 9 A plug 16 is provided at the opening of the first through hole 3, the second through hole 4, and the third left-facing through hole 5. The third through hole has a high-pressure air intake, so a sealing block 17 is provided between the second and third stages. A sealing ring 18 is also provided on the sealing block 17. The circles symmetrically arranged along the central axis inside the hollow part in the figure are all sealing rings 18. An inner tube 19 is provided in the third through hole. A support and plug 20 is provided at the front end (left side) of the inner tube 19. A support 21 is provided near the opening of the third right-facing through hole 6. A through hole needs to be opened on the support 21 to realize gas backflow.

[0105] A sealing valve 22 is provided in the fourth left through hole 7. The sealing valve 22 has an axial through hole 23 and a radial connecting hole 24 corresponding to the sixth through hole 10. The air intake can be fully opened and fully closed by rotating the sealing valve 22. A one-way valve 25 is provided at the front end of the middle through hole 23 of the sealing valve 22. When closed or in the initial position, it can avoid the pressure imbalance in the cavity caused by gas backflow.

[0106] Make a notch on the outer ring of the peak valve to serve as alignment mark point 26.

[0107] A sealing block 27 is provided at a position opposite to the middle through hole 23 inside the sealing valve 22. The sealing block 27 is connected to a guide rod. A sealing structure is provided on the outside of the guide rod 28. The opening degree of the first through hole 3 at the fourth left through hole 7 is controlled and adjusted by moving the guide rod 28 to drive the sealing block 27 to move, thereby realizing the adjustment of the gas flow rate.

[0108] The guide rod 28 extends out of the right side of the base along the fourth through hole. A support rod 29 is provided below the guide rod 28. The guide rod 28 and the support rod 29 are respectively provided with a first hinge hole 30 and a second hinge hole 31 at their ends.

[0109] A return valve 32 is installed inside the fifth through hole 9. The front end of the return valve 32 extends out of the right side wall of the base. An elastic element is installed inside to push the return valve 32 outward as a whole. For the specific structure, those skilled in the art can refer to the setting of the reset spring. A spring base is set on the inner wall of the base, and the other end of the spring has two sections of the return valve 32 body.

[0110] The diameter of the reflux valve 32 decreases near its right end, and a reflux cavity 33 exists between its outer wall and the fifth through hole 9. The seventh through hole 11 extends into this reflux cavity 33. Furthermore, an axial opening extends to the right end and can connect with the second through hole 4. Its radial opening 34 connects the axial opening 35 and the reflux cavity 33. Its overall structure is described below. Figure 10 Figure 11 .

[0111] like Figure 12 As shown, the upper part of the pressing handle 36 is hinged with the first hinge hole 30 and the second hinge hole 31 with a clearance fit. A support part 37 is provided below the junction corresponding to the second hinge hole 31 and contacts the end of the return valve 32.

[0112] Figure 12 This is also the initial state for gear adjustment. Figure 13 Figure 14 This refers to the 1st and 2nd gear settings.

[0113] In the initial state, no high-pressure gas passes through the device, and the cryogenic head is at ambient temperature.

[0114] When the valve is open and in position 1, high-pressure gas flows in through the valve, the sealing head valve opens, and the return valve 32 is also open. It should be noted that the hemispherical head end of the return valve also has a central hole and side holes to guide the return gas to the return cavity 33.

[0115] Gear 2 status,

[0116] Equilibrium state: High-pressure gas flow increases, and this state requires holding to maintain. The opening of the plug valve increases, and no gas flows around the reflux valve 32 in contact with the base. Only the reflux valve's central hole guides the reflux cavity 33, increasing the overall internal flow.

[0117] Overpressure protection status: Second-level overpressure protection refers to excessive gripping and pressing of handle 36, and the return valve is in a near-closed state (the end of the return valve is made of elastic material, which causes its central hole to shrink by squeezing with the tapered surface at the end of the fifth through hole), that is, the air flow rate is greatly reduced, resulting in reduced flow, weakened cooling capacity, and gradually rising temperature.

[0118] Return to position, at which point the high-pressure gas is completely shut off, and the return valve is in its most open state.

[0119] like Figure 15-17 As shown: The gear locking structure includes a slide 38 disposed in the housing 46. A slider 39 that cooperates with the slide 38 is disposed at the lower part of the pressing handle 36. The sliding surface of the slide 38 is inclined from left to right and from low to high. There is a groove 40 for temporary positioning of gear 1 in the middle right position.

[0120] A barb 41 is provided on the far right side of the slide 38 to prevent the handle from slipping out. A push block 42 is provided on one side of the barb 41. The middle part of the push block 42 is hinged to the slide 38 with its upper part facing upward. A stop block 43 is provided at the upper end of the push block 42. The stop block 43 initially blocks the slider 39 from sliding to the right. The lower end is equipped with a counterweight or a torsion spring mounting seat. The stop block 43 is connected to the right side of the slide 38 through a spring-loaded push block 44 and related conductive parts. A slide tension spring 45 is also provided at the bottom of the slide 38 to push the slide 38 upward.

[0121] Example 2:

[0122] A method for manufacturing a fluid level adjustment component includes base hole opening and component installation. The method includes the following steps (more specifically, refer to the hole opening step and component installation in Embodiment 1):

[0123] S1: Make a base with two symmetrical planes, the two parallel planes being the top and bottom planes respectively, and use the center plane of symmetry between the top and bottom planes as the third plane; for ease of construction, the top and bottom planes can be made parallel to each other.

[0124] S2: On the third plane, a first through hole 3 and a second through hole 4 are opened along two center lines in the vertical direction. The depth of the second through hole 4 is greater than that of the first through hole 3, or both the first through hole 3 and the second through hole 4 penetrate the base.

[0125] S3: The third and fourth through holes are opened in a manner that is interconnected with the first through hole 3 and the second through hole 4. In order to simplify the processing procedure, the third through hole / fourth through hole can be perpendicular to the first through hole 3 / second through hole 4, and a fifth through hole 9 is opened below the fourth through hole and interconnected with the second through hole 4. The fifth through hole 9 starts from the right side wall of the base and connects to the second through hole 4.

[0126] Nineteen inner tubes, smaller than the inner diameter of the third through hole, are installed inside the third through hole and connected to the first through hole 3. The passage of the third through hole outside the 19 inner tubes is blocked at the front end of the first through hole 3 and is not connected to the second through hole 4; that is, the inner tube 19 is connected to the first through hole 3.

[0127] S4: A sixth through hole 10 is made at a point near the front end of the fourth through hole, pointing towards the top surface, extending to the top surface; when making the hole, it can be made from the top surface downwards to extend to the fourth through hole;

[0128] A seventh through hole 11 is made at another point on the top surface near the front end of the fifth through hole 9, extending to the top surface; similarly, holes are made from the top surface downwards.

[0129] S5: An eighth through hole 12 is opened on any side wall of the base to connect to the sixth through hole 10, and a ninth through hole 13 is opened to connect to the seventh through hole 11, wherein the eighth through hole 12 and the ninth through hole 13 serve as the starting ends of the first pipeline and the second pipeline, respectively.

[0130] S5 also includes opening a tenth through hole 14 on the same side wall of the base to connect to the eighth through hole 12 and an eleventh through hole 15 to connect to the ninth through hole 13;

[0131] The tenth through hole 14 and the eleventh through hole 15 serve as the starting ends of the first and second pipelines, respectively, and the inner tube 19 and the outer tube of the rear end of the third through hole serve as the ends of the first and second pipelines, respectively.

[0132] To facilitate processing, all openings on the base are through holes that penetrate at least one side of the base. Therefore, except for the inlet and outlet air inlet and outlet, all other openings need to be sealed. Furthermore, when connecting the inner tube 19 and the guide rod 28, sealing treatment is required around them. Therefore, the opening method is mostly multi-segment holes (multi-stage openings / stepped holes).

[0133] For example, in S3, both the third and fourth through holes are opposite openings, where:

[0134] The third through hole is opened in a three-stage manner on one side, and the opening depth satisfies the requirement that the diameter of the second stage (the smallest inner diameter hole in each hole is the first stage, and they are ordered in ascending order) exceeds the diameter of the first through hole 3.

[0135] The second opening of the third through hole facilitates the installation of the support and sealing component 20 for the inner tube 19. The sealing ring 18 is placed at the first through hole, which can effectively position the support and sealing component 20, the sealing ring 18, and other parts.

[0136] The other side has a three-stage opening method. The opening depth satisfies that the first stage opening extends from the side wall of the second through hole 4 to the opposite opening, and the second stage opening extends to the side wall of the second through hole 4. That is, the second through hole 4 and the outer cavity of the inner tube 19 of the third through hole are connected. When applied to the cryosurgery device, it serves as the air outlet 2.

[0137] The fourth through hole has a 5-stage opening on the left side, with its third stage opening extending beyond the first through hole 3; the other side has a 3-stage opening, with its first stage opening extending to the opposite opening.

[0138] The third-order opening of the fourth through hole is perpendicularly connected to the first through hole 3;

[0139] The sealing block 27 is installed in the third-order through hole of the fourth through hole;

[0140] The first through hole 3 is a slotted hole, with the slotting direction perpendicular to the radial direction of the fourth through hole. That is, the fourth through hole and the first through hole 3 are connected to form a section of the intake pipe 1, and the flow rate is adjusted by adjusting the sealing block 27.

[0141] The sealing block 27 is connected to the guide rod 28, which is driven axially by one or more of the following methods: electromagnetic drive, gear and rack motor drive, and lever pressing drive.

[0142] One end of the guide rod 28 is connected to the sealing block 27, and the other end extends out of the fourth through hole and is hinged to the pressing handle 36.

[0143] A stop valve 22 is installed on one side of the fourth through hole;

[0144] The sealing valve 22 is embedded in the front end of the fourth through hole;

[0145] The sealing valve 22 can rotate relative to the fourth through hole;

[0146] A radial connecting hole 24 is provided on the sealing valve 22 along the radial direction. The radial connecting hole can be rotated to be coaxial with the sixth through hole 10.

[0147] The sealing valve 22 also has an axial connecting hole along the axial direction, which is in the same direction as the cavity where the fourth through hole is located and is opposite to the sealing block 27.

[0148] The outer side of the stop valve 22 is provided with a conduction rotation position indicator. The conduction position indicator is the alignment mark 26 on the outer wall of the stop valve 22, which is a reference mark point on the side wall of the base and an alignment mark point 26. The reference mark point / alignment mark point 26 can be one or more combinations of a protrusion, a groove 40, a distinguishing color, or a pointer. By turning the stop valve, the connection between the radial connecting hole 24 and the sixth through hole 10 on the stop valve is disconnected, which can completely prevent gas from entering and completely shut down the system operation.

[0149] The first through hole 3 to the eleventh through hole 15 all adopt a multi-stage opening method, and the sealing element, connector and plug are set at the intersection of the multi-stage.

[0150] Example 3:

[0151] like Figure 18As shown: A cryosurgery device includes a fluid level adjustment assembly manufactured as described above, which is installed inside a housing 46. A cryosurgery probe 47 is connected to the end of a third through-hole. The air inlet pipe of the cryosurgery probe 47 is connected to an inner tube 19, and the air outlet pipe is connected to the third through-hole. The air inlet pipe is also connected to the end of a tenth through-hole 14; the air outlet pipe 2 is connected to the end of an eleventh through-hole 15. The overall shape of the cryosurgery device is similar to a gun, with the base located inside the housing 46. A stop valve and a spring-loaded pusher 44 extend or are mechanically connected to the outside of the housing 46 for operation.

Claims

1. A fluid level adjustment assembly, comprising a fluid pipeline and an opening control module disposed on the fluid pipeline, characterized in that, The fluid pipeline is provided on the base and includes a first pipeline and a second pipeline. The starting and ending ends of the first pipeline and the second pipeline are connected to different positions on the side wall of the base and pass through as connection ports. The first pipeline and the second pipeline are separated at their starting points and converge at their ending points; The opening control module includes a straight pipe section located in the first or second pipeline, and also includes a blocking block (27) located within the straight pipe section that can move axially along the straight pipe section. The sequential connecting section of the straight pipe section is connected to the inner wall of the straight pipe section.

2. The fluid level adjustment assembly as described in claim 1, characterized in that, The central axes of the starting ends of the first pipeline and the second pipeline are located at different positions on the first plane of the base, and the central axes of the middle section of the first pipeline and the second pipeline are located at different positions on the second plane of the base. The ends of the first pipe and the second pipe are located at different positions on the third plane of the base, and the central axes of the first pipe and the second pipe near their ends coincide in the third plane.

3. The fluid level adjustment component as described in claim 2, characterized in that, The portions of the first plane and the third plane within the base do not intersect, while the portions of the second plane and the first plane, as well as the portions of the second plane and the third plane within the base, all intersect.

4. The fluid level adjustment component as described in claim 3, characterized in that, The first pipeline includes a first section, a second section, a third section, a fourth section, a fifth section, and a sixth section connected in sequence. The first section is located near the outer contour of the base as a front opening. The first section and the second section are located in the first plane and are coaxially connected or at an angle to each other. The third segment and the second segment form an angle with each other, which is the angle between the third end and the first plane, and the third segment is located in the second plane; The fourth, fifth, and sixth segments are sequentially connected and located within the third plane; The sealing block (27) is located in the fourth segment, which has a side wall opening near its front end and extends along the hole to form the fifth segment.

5. A fluid level adjustment assembly as described in claim 4, characterized in that, The second pipeline includes segments a, b, c, d, e, and f connected in sequence. Segment a is located at the outer contour of the base as a front opening. Segment a is close to the first segment. Both segments a and b are within the first plane. Segment c lies within the second plane; The portion of segment f near its end overlaps with the sixth segment, which is an inner tube (19) with an outer diameter smaller than that of segment f, located inside segment f.

6. The fluid level adjustment assembly as described in claim 4, characterized in that, It also includes a drive mechanism for driving the movement of the blocking block (27) within the fourth segment. The drive mechanism is driven by one or more of the following: electromagnetic drive, rack and pinion motor drive, and lever pressing drive.

7. A fluid level adjustment assembly as described in claim 6, characterized in that, The fifth section is a trough-shaped pipeline, with the troughing direction set along the path of the fourth section.

8. A fluid level adjustment assembly as described in claim 7, characterized in that, The driving mechanism is a lever pressing driving mechanism. The fourth end extends axially to the side wall of the base and penetrates the side wall. The sealing block (27) includes a sealing head (16) located at the inner end and a guide connecting rod connected to the sealing head (16). The guide connecting rod extends to the outside of the base. A fixed support base is provided below the guide rod (28), and the two hinge points of the pressing handle (36) are respectively hinged to the support base and the end of the guide connecting rod.

9. A fluid level adjustment assembly as described in claim 8, characterized in that, The lever pressing drive mechanism also includes a spring mechanism for resetting the sealing head (16).

10. A method for manufacturing a fluid level adjustment component, characterized in that, The method is used to manufacture the fluid level adjustment assembly according to claim 9, the method comprising: S1: Construct a base with two parallel planes of symmetry, namely the top and bottom planes, and use the center plane of symmetry between the top and bottom planes as the third plane; S2: On the third plane, a first through hole (3) and a second through hole (4) are made in the vertical direction for two center lines. The depth of the second through hole (4) is greater than that of the first through hole (3) or both the first through hole (3) and the second through hole (4) penetrate the base. S3: A third through hole and a fourth through hole are opened in a manner that connects with the first through hole (3) and the second through hole (4) mentioned above, and a fifth through hole (9) is opened below the fourth through hole to connect with the second through hole (4); an inner tube (19) with a diameter smaller than the inner diameter of the third through hole is installed in the third through hole to connect to the first through hole (3), and the passage of the third through hole outside the inner tube (19) to the first through hole (3) is blocked and not connected to the second through hole (4); S4: A sixth through hole (10) is opened at a point near the front end of the fourth through hole, pointing towards the top surface, to penetrate to the top surface; A seventh through hole (11) is opened at another point on the top surface near the front end of the fifth through hole (9) to penetrate to the top surface; S5: Open an eighth through hole (12) to connect to the sixth through hole (10) and a ninth through hole (13) to connect to the seventh through hole (11) on any side wall of the base in a connected manner.

11. A method for manufacturing a fluid level adjustment component as described in claim 10, characterized in that, The S5 further includes a tenth through hole (14) connected to the eighth through hole (12) and an eleventh through hole (15) connected to the ninth through hole (13) on the same side wall of the base. The tenth through hole (14) and the eleventh through hole (15) serve as the starting ends of the first pipe and the second pipe, respectively, and the inner tube (19) and outer tube of the rear end portion of the third through hole serve as the ends of the first pipe and the second pipe, respectively.

12. A method for manufacturing a fluid level adjustment component as described in claim 11, characterized in that, In step S3, both the third through hole and the fourth through hole are opposite openings, wherein: The third through hole has a three-stage opening method on one side, and the opening depth satisfies that the second-stage hole diameter exceeds the first through hole (3); the other side has a three-stage opening method, and the opening depth satisfies that the first-stage opening penetrates from the side wall of the second through hole (4) to the opposite opening, and the second-stage opening penetrates to the side wall of the second through hole (4). The fourth through hole has a 5-stage opening on one side, with its third stage opening extending beyond the first through hole (3); the other side has a 3-stage opening, with its first stage opening extending to the opposite opening.

13. A method for manufacturing a fluid level adjustment component as described in any one of claims 10-12, characterized in that, The third-order opening of the fourth through hole is perpendicularly connected to the first through hole (3); The sealing block (27) is disposed in the third-order through hole of the fourth through hole; The first through hole (3) is a slotted hole, and the slotting direction is perpendicular to the radial direction of the fourth through hole.

14. A method for manufacturing a fluid level adjustment component as described in claim 13, characterized in that, The sealing block (27) is connected to the guide rod (28), which is driven axially by one or more of the following driving methods: electromagnetic drive, gear and rack motor drive, and lever pressing drive.

15. A method for manufacturing a fluid level adjustment component as described in claim 14, characterized in that, One end of the guide rod (28) is connected to the sealing block (27), and the other end is hinged to the pressing handle (36).

16. A method for manufacturing a fluid level adjustment component as described in claim 15, characterized in that, A sealing valve (22) is provided on one side of the fourth through hole; The sealing valve (22) is embedded in the front end of the fourth through hole; The sealing valve (22) can rotate relative to the fourth through hole; The sealing valve (22) has a radial connecting hole (24) along the radial direction, and the radial connecting hole can be rotated to be coaxial with the sixth through hole (10); The sealing valve (22) is also provided with an axially connected hole along the axial direction. The axially connected hole is in the same cavity as the fourth through hole and is opposite to the sealing block (27). The sealing valve (22) is provided with a conduction rotation position mark on the outside. The conduction position mark is a reference mark point set on the side wall of the base and an alignment mark point (26) on the outer wall of the sealing valve (22). The reference mark point / alignment mark point (26) is one or more combinations of a protrusion, a groove (40), a distinguishing color, and a pointer.

17. A method for manufacturing a fluid level adjustment component as described in any one of claims 14-16, characterized in that, The first through hole (3) to the eleventh through hole (15) all adopt a multi-stage opening method, and the sealing element, connector and plug are set at the intersection of the multi-stage.

18. A cryosurgery device, characterized in that, The fluid level adjustment device includes the fluid level adjustment device as described in claims 1-9 or the fluid level adjustment device made by the method described in any one of claims 10-16, wherein the freezing probe (47) is connected to the end of the third through hole, the air inlet pipe is connected to the end of the tenth through hole (14), and the air outlet pipe (2) is connected to the end of the eleventh through hole (15).

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