Self-resetting door closer for micro-hyperbaric chamber

Abstract

A self-resetting door closing mechanism for a micro hyperbaric oxygen chamber includes a mounting plate, an ejector cylinder and a piston cylinder fixedly connected to the mounting plate, an ejector spring installed inside the ejector cylinder, a locking tongue tube fixedly connected to the inner left end of the ejector seat, an annular limiting groove on the sliding column, a ball bearing hole on the ejector cylinder wall, a sliding sleeve on the ejector cylinder, a trunnion fixedly connected to the sliding sleeve, a notch on the U-shaped fork with the trunnion located in the notch, a shaft hole on the mounting plate, an unlocking shaft passing through the shaft hole and slidably installed in the shaft hole, a seal between the unlocking shaft and the shaft hole, an end hinge to the end of the fork handle, a sliding groove on the inner end face of the piston cylinder, a slider slidably installed in the sliding groove, a limiting groove on the slider, a limiting pin on the piston, an end plug screwed onto the internal thread, a piston spring installed between the end plug and the piston cylinder, and the sliding column being limited and stopped in the ejector cylinder by the ball bearing. This mechanism solves the problem of self-sealing of the oxygen chamber door.

Description

Technical Field

[0001] This invention relates to the technology of doors for micro hyperbaric oxygen chambers, and particularly to a self-resetting door closing mechanism for transparent micro hyperbaric oxygen chambers, belonging to the field of mechanical technology. Background Technology

[0002] A hyperbaric oxygen chamber is a device that generates a micro-high-pressure environment, allowing personnel inside to inhale oxygen. The pressure difference between the inside and outside is generally less than 0.5 atmospheres, approximately 50 kPa. This micro-high-pressure environment is beneficial for the human body's oxygen absorption and can be used in medical, sports, beauty, home, military, and hypoxic environments. Because personnel and internal facilities need to enter and exit, the device is designed with a door. The sealing between the door and the chamber is a key technology. Currently, the door structure of hyperbaric oxygen chambers is basically divided into two types: one uses a structure similar to a ship's hatch, with the door opened and closed by rotating a handle or handwheel; the other uses a flat seal made of acrylic or tempered glass. Ship-type doors have high structural strength and good sealing effect, but are very heavy, and the locking mechanism is located inside the door, leaving only a limited observation window, making a fully transparent design impossible, which is both unfavorable for external observation and aesthetically unappealing. Transparent acrylic or tempered glass doors, on the other hand, allow for complete transparency except for the handle, facilitating observation, and are lightweight and aesthetically pleasing. Their sealing relies on the pressure inside the chamber. The self-sealing of the door and the upper sealing strip on the inner wall of the chamber ensures a seal. However, there is a problem in its use: when the equipment starts running, it takes a certain amount of time to reach the set treatment pressure from the initial pressure. This requires a certain pre-pressure between the door and the sealing ring. Otherwise, excessive leakage will cause the pressurization time to be too long or the self-sealing to fail. Currently, existing micro-hyperbaric oxygen chambers use a method where a person manually pulls the door tight from the outside at the beginning of the equipment operation until the self-sealing pressure is reached. However, this method is severely limited by the processing precision of the sealing strip and the chamber body. Even deformation caused by temperature changes can affect the flatness, making it difficult for personnel to complete this operation easily. Moreover, the force applied by the personnel cannot be controlled, often causing deformation of the chamber body at the door joint. This leads to poor sealing problems in subsequent use. Poor sealing, in turn, causes personnel to apply more force when applying pre-pressure, creating a vicious cycle and affecting the service life of the oxygen chamber. However, according to the safety requirements for the use of oxygen chambers, it is necessary to ensure that the oxygen chamber can be quickly opened from the outside after depressurization in an emergency. Locks opened with various keys are not suitable for this situation. Summary of the Invention

[0003] The purpose of this invention is to overcome the aforementioned problems existing in micro hyperbaric oxygen chambers that currently use acrylic or tempered glass doors, and to provide a self-resetting door closing mechanism for micro hyperbaric oxygen chambers.

[0004] To achieve the objective of this invention, the following technical solution is adopted: A self-resetting door closing mechanism for a micro-hyperbaric oxygen chamber, comprising a mounting plate 1, on which an ejector cylinder and a piston cylinder are fixedly connected inward and outward directions. An ejector spring is installed at the bottom of the ejector cylinder. A sliding column is fixedly connected to or integrally provided at the outer end of the ejector seat, and the sliding column is slidably installed inside the ejector cylinder. The two ends of the ejector spring respectively abut against the sliding column and the bottom of the ejector cylinder. A locking tongue tube is fixedly connected to the left side of the inner end of the ejector seat, and the locking tongue is slidably installed in the locking tongue tube in the left-right direction. The tongue has a hollow structure. The left end of the tongue is a beveled cap, which is detachably connected to the tongue. The right end of the tongue has a sliding hole. The large head of the T-shaped slide rod is located in the cavity of the tongue, and the rod slides through the sliding hole. The size of the large head of the T-shaped slide rod is larger than the size of the sliding hole. One end of the tongue spring abuts against the beveled cap, and the other end abuts against the large head of the T-shaped slide rod. A countersunk hole is provided on the ejector seat on the right side of the tongue tube. The rod passes through the countersunk hole and is connected to the slider. A return spring passes through the rod. One end of the return spring abuts against the bottom of the countersunk hole, and the other end abuts against the slider.

[0005] A ring-shaped limiting groove is formed on the sliding column, and a ring of ball bearing holes is formed on the ejector tube wall. Each ring of ball bearing holes consists of multiple ball bearing holes, each containing a ball bearing. A sliding sleeve is fitted over the ejector tube, with an inwardly convex ring on its inner wall. A spring limiting part is located on the sliding sleeve. An inner limiting spring is fitted over the ejector tube between the inner end of the spring limiting part and the ejector seat, and an outer limiting spring is fitted over the ejector tube between the outer end of the spring limiting part and the outer limiting part formed by the mounting plate. A trunnion is fixedly connected to the sliding sleeve at 180-degree intervals. The two U-shaped end faces of the U-shaped fork are... A notch is provided, and the trunnion is located in the notch. The bottom of the U-shaped fork is integrally or fixedly connected to a fork handle. The fork handle is hinged to a hinge seat fixedly connected to the mounting plate. A shaft hole is provided on the mounting plate. The unlocking shaft passes through the shaft hole and is slidably installed in the shaft hole. The unlocking shaft and the shaft hole are sealed. The end of the fork handle is hinged to the unlocking shaft. When the ball is aligned with the annular limiting groove and the inner convex part is pressing against the ball, the slide is limited in the ejection tube. When the unlocking shaft slides inward and outward, the fork drives the sliding sleeve to move inward and outward, the ball disengages from the inner convex part, and no longer limits the slide.

[0006] The piston cylinder has a groove on its inner end face, and a slider is slidably installed in the groove. A limit groove is provided on the outer end face of the slider. An internal thread is machined on the outer end of the inner wall of the piston cylinder. The piston is slidably installed in the piston cylinder within the internal thread. The piston and the piston cylinder are sealed. A limit pin is fixedly connected to or integrally provided on the inner end of the piston. The end face of the limit pin is a sloped surface from left to right and outward. The limit pin is adapted to the limit groove. An end plug is screwed onto the internal thread. A piston spring is installed between the end plug and the piston cylinder. After the slider is limited in the ejection tube by the ball, in its natural state, the piston spring pushes against the piston, causing the limit pin to be located in the limit groove, and the reset elasticity is compressed.

[0007] Furthermore, a lever is fixedly connected to the slider by screws.

[0008] Furthermore, handles are fixedly connected to both the inner and outer ends of the unlocking shaft.

[0009] Furthermore, the limiting groove is a trapezoidal groove with a large opening and a small bottom.

[0010] Furthermore, the limiting pin is cylindrical.

[0011] Furthermore, a guide rod parallel to the T-shaped slide bar is fixedly connected to the locking tongue, and a guide hole is provided on the ejector seat, through which the guide rod slides.

[0012] Furthermore, the end plug is provided with through holes in the inward and outward directions.

[0013] The positive and beneficial technical effects of this invention are as follows: After the hatch is closed, the locking tongue can press the hatch tightly, allowing the cabin to pressurize normally. Under normal circumstances, after pressurization, the locking tongue can release the restriction on the hatch by the return spring, and it can be opened normally after depressurization. In case of reset failure, in an emergency, the ejection seat can be ejected by the unlocking shaft to release the restriction of the locking tongue on the hatch. When used in a transparent micro-hyperbaric oxygen chamber, it solves the problem of acrylic or tempered glass doors self-sealing. While eliminating the need for manual pulling of the door to wait for it to enter the self-sealing state, it also has a dual insurance function: it can reset itself after reaching the design pressure self-sealing and can be quickly unlocked by pressure and pull operations inside and outside the chamber. The specific implementation method will be described in detail. Attached Figure Description

[0014] Figure 1 This is an overall schematic diagram of the present invention.

[0015] Figure 2 This is the second overall schematic diagram of the present invention.

[0016] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0017] Figure 4 yes Figure 3 A partial schematic diagram.

[0018] Figure 5 This is a schematic diagram of the components on the mounting plate.

[0019] Figure 6 This is a schematic diagram of the sliding sleeve.

[0020] Figure 7 This is a schematic diagram of the shift fork assembly.

[0021] Figure 8 This is a schematic diagram of the catapult launcher's slide rail.

[0022] Figure 9 This is a schematic diagram of the present invention with some components removed.

[0023] Figure 10 This is a schematic diagram of the present invention installed on a micro hyperbaric oxygen chamber. Detailed Implementation

[0024] To more fully explain the implementation of the present invention, implementation examples are provided. These implementation examples are merely illustrative of the present invention and do not limit the scope of the present invention.

[0025] The markings in the attached diagram are as follows: 1: Mounting plate; 2: Ejector seat; 201: Guide hole; 3: Piston cylinder; 301: Slide groove; 4: Locking tongue tube; 5: Locking tongue; 6: Sloping cover; 7: Sliding sleeve; 701: Inner protrusion; 8: Trunnion; 9: U-shaped shift fork; 901: Notch; 10: Outer limit spring; 11: Inner limit spring; 12: Unlocking shaft; 13: Handle; 14: Slider; 141: Limiting groove; 15: Lever; 16: Hinge seat; 17: Shift fork handle ; 18: Ejector tube; 181: Ball bearing hole; 19: Sliding column; 191: Annular limiting groove; 20: Ball bearing; 21: Ejector spring; 22: Spring limiting part; 23: Locking tongue spring; 24: T-shaped sliding rod; 241: Large head; 242: Rod part; 25: Countersunk hole; 26: Return spring; 27: Piston; 28: Limiting pin; 281: Sloping surface; 29: Piston spring; 30: End plug; 31: Through hole; 32: Shaft hole; 33: Guide rod.

[0026] In this application, "inside and outside" refers to the direction inside and outside the cabin, and "left and right" refers to... Figure 3 The left and right are used as references. The direction definition in this invention is only for better explanation and is not intended to limit the actual direction of the invention in use.

[0027] As shown in the attached figure, a self-resetting door closing mechanism for a micro hyperbaric oxygen chamber includes a mounting plate 1 for fixed connection with the chamber body. An ejection cylinder 18 and a piston cylinder 3 are fixedly connected to the mounting plate in both inward and outward directions. An ejection spring 21 is installed at the bottom of the ejection cylinder. A sliding column 19 is fixedly connected to or integrally formed with the outer end of the ejection base. The sliding column is slidably installed inside the ejection cylinder 18. The two ends of the ejection spring 21 abut against the sliding column and the bottom of the ejection cylinder, respectively. An opening is formed on the sliding column 19. A ring-shaped limiting groove 191 is provided, the limiting groove being trapezoidal with a large opening and a small bottom. A ring of ball bearing holes 181 is formed on the periphery of the ejection tube 18, the ring consisting of multiple ball bearing holes, each containing a ball bearing 20. A sliding sleeve 7 is provided outside the ejection tube, the inner wall of which has a ring of inward protrusions 701. A spring limiting part 22 is provided on the sliding sleeve, and an inner limiting spring 11 is provided outside the ejection tube between the inner end of the spring limiting part and the ejection seat. An outer limiting spring 10 is fitted over the ejector tube between the end and the mounting plate forming an outer limit; a trunnion 8 is fixedly connected to the sliding sleeve at 180-degree intervals; notches 901 are opened on the two U-shaped end faces of the U-shaped fork 9, and the trunnion 8 is located in the notches 901; a fork handle 17 is integrally or fixedly connected to the bottom of the U-shaped fork 9, and the fork handle is hinged to a hinge seat 16 fixedly connected to the mounting plate; a shaft hole 32 is opened on the mounting plate, and the unlocking shaft 12 passes through the shaft inside and outside. The unlocking shaft is slidably installed in the shaft hole, and handles 13 are fixedly connected to both the inner and outer ends of the unlocking shaft; the unlocking shaft is sealed with the shaft hole, and the end of the fork handle 17 is hinged to the unlocking shaft. The U-shaped fork and the fork handle constitute the fork component. When the ball 20 is aligned with the annular limiting groove 191 and the inner protrusion 701 abuts against the ball, the slide column 19 is limited in the ejection tube; when the unlocking shaft is slid inward and outward, the fork component drives the sliding sleeve to move inward and outward, the ball disengages from the inner protrusion and no longer limits the slide column.

[0028] A locking tongue tube 4 is fixedly connected to the inner left side of the ejector base. The locking tongue 5 is slidably installed in the locking tongue tube 4 in the left and right directions. A guide rod 33 parallel to the T-shaped slide rod is fixedly connected to the locking tongue. A guide hole 201 is opened on the ejector base, and the guide rod slides through the guide hole. The latch has a hollow structure. The left end of the latch is a beveled cover 6, which is detachably connected to the latch. The right end of the latch has a sliding hole. The large head 241 of the T-shaped slide rod 24 is located in the cavity of the latch, and the rod 242 slides through the sliding hole. The size of the large head of the T-shaped slide rod is larger than the size of the sliding hole. One end of the latch spring 23 abuts against the beveled cover 6 and the other end abuts against the large head 241 of the T-shaped slide rod. A countersunk hole 25 is provided on the ejector seat on the right side of the latch tube. The rod 242 passes through the countersunk hole and is connected to the slider 14. A return spring 26 passes through the rod. One end of the return spring 26 abuts against the bottom of the countersunk hole and the other end abuts against the slider 14.

[0029] The piston cylinder has a groove 301 on its inner end face. A slider 14 is slidably installed in the groove. A lever 15 is fixedly connected to the slider by screws. The lever is easy to operate. A limit groove 141 is provided on the outer end face of the slider. An internal thread is machined on the outer end of the inner wall of the piston cylinder. The piston 27 is slidably installed inside the piston cylinder within the internal thread, sealing the piston and piston cylinder. A limit pin 28 is fixedly connected to or integrally provided on the inner end of the piston. The end face of the limit pin is a slope 281 from left to right and outward. The pin is cylindrical, and the small contact area between the cylinder and the limiting groove can reduce friction. The limiting pin is adapted to the limiting groove, and an end plug 30 is screwed onto the internal thread. The end plug has through holes 31 in the inward and outward directions. The through holes ensure that the pressure at the outer end of the piston will not exceed atmospheric pressure. A piston spring 29 is installed between the end plug 30 and the piston cylinder. The piston spring provides preload to the piston. After the slide is limited in the ejection tube by the ball, in the natural state, the piston spring pushes against the piston, causing the limiting pin to be located in the limiting groove, and the reset elasticity is compressed.

[0030] During assembly in this invention, the slide bar is inserted into the slide hole from the left end of the latch, the latch spring is placed in, and then the beveled end of the cover is connected to the dovetail groove. A guide rod is installed on each side of the latch. This assembled part is then inserted into the ejector seat from the left end. A return spring is installed in the countersunk hole at the right end of the ejector seat. The return spring is sleeved on the rod. A slider is fixedly installed on the thread at the end of the rod. Then, the lever is installed on the slider with screws. An outer limiting spring is sleeved on the ejector tube. Then, six balls are placed into the ball sockets (ball holes) around the circumference of the ejector tube in sequence. Then, the slide sleeve is sleeved in, followed by the inner limiting spring. The ejector spring is placed inside the ejector tube. Then, the slide sleeve is slid up or down by hand until it is in the unlocked position. At this time, the slide pin on the assembled ejector is inserted into the ejector tube. The slide sleeve is released, and the slide pin is moved up and down. After hearing a click, the ejector seat is locked in place. Install the two piston seal rings into the sealing grooves on the piston, then adjust the direction so that the inclined side of the slope of the limit pin at the upper end of the piston faces the right. Install the piston into the piston cylinder of the mounting plate, then put in the piston spring, and then rotate and screw in the end plug. During installation, you can use a dry pressing block to make the limit pin correspond to the limit groove. After the limit pin enters the limit groove, the return spring is compressed and stores energy.

[0031] The working principle of this invention is as follows: When the door of the oxygen chamber is pulled from the inside out, and the door edge touches the beveled end of the latch, the latch is pressed into the latch tube. After the entire door passes the latch, the latch pops out under the action of the latch spring. At this time, the door is locked and pre-pressed onto the sealing ring by the outer plane. Then, the oxygen chamber can be pressurized by releasing the handle. When the pressure difference between the inside and outside of the chamber reaches the design value, such as 10 kPa, the pressure at the inner end of the piston is 1.1 atmospheres, and the pressure at the lower end of piston 27 is the normal 1 atmosphere. At this time, under the action of the pressure difference, the piston pushes the piston spring outward, the limit pin disengages from the limit groove, and the slider unlocks. At this point, the slider, slide bar, and latch move to the right and reset as a whole. The latch no longer restricts the door's left and right movement, and the door closes by relying on the pressure difference between the inside and outside. When the automatic reset fails or in other emergency situations, the handle can be pushed or pulled from the inside or outside, causing the unlocking shaft to move axially. This causes the shift fork to rotate around the central fulcrum, resulting in the U-shaped end of the shift fork being axially positioned, which in turn causes the slide sleeve to be axially positioned. When the slide sleeve moves to the unlocking position, the surrounding steel balls disengage radially outward, the slide bar is unlocked, and the ejector seat and upper latch and other accessories are pushed away under the action of the ejector spring to achieve the effect of quick unlocking.

[0032] After a detailed description of the embodiments of the present invention, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.

Claims

1. A self-resetting door closing mechanism for a micro hyperbaric oxygen chamber, comprising a mounting plate for connection with the chamber body, characterized in that: An inward-outward oriented ejection cylinder and piston cylinder are fixedly connected to the mounting plate. An ejection spring is installed at the bottom of the ejection cylinder. The outer end of the ejection seat has a sliding column, which is slidably installed inside the ejection cylinder. The two ends of the ejection spring abut against the sliding column and the bottom of the ejection cylinder, respectively. A locking tongue tube is fixedly connected to the left side of the inner end of the ejection seat. The locking tongue is slidably installed in the locking tongue tube in the left-right direction. The locking tongue has a hollow structure, and the left end of the locking tongue is a beveled cap, which is detachably connected to... On the latch, the right end of the latch has a constriction. The large head of the T-shaped slide rod is located in the cavity of the latch, and the rod slides through the constriction. The size of the large head of the T-shaped slide rod is larger than the size of the constriction. One end of the latch spring abuts against the inclined cover and the other end abuts against the large head of the T-shaped slide rod. A countersunk hole is opened on the ejector seat on the right side of the latch tube. The rod passes through the countersunk hole and is connected to the slider. A return spring passes through the rod. One end of the return spring abuts against the bottom of the countersunk hole and the other end abuts against the slider. A ring-shaped limiting groove is formed on the sliding column, and a ring of ball bearing holes is formed on the ejector tube wall. Each ring of ball bearing holes consists of multiple ball bearing holes, each containing a ball bearing. A sliding sleeve is fitted over the ejector tube, with an inwardly convex ring on its inner wall. A spring limiting portion is located on the sliding sleeve. An inner limiting spring is fitted over the ejector tube between the inner end of the spring limiting portion and the ejector seat, and an outer limiting spring is fitted over the ejector tube between the outer end of the spring limiting portion and the outer limiting portion formed by the mounting plate. A trunnion is fixedly connected to the sliding sleeve at 180-degree intervals. The two U-shaped end faces of the U-shaped fork have... There is a notch, and the trunnion is located in the notch. The bottom of the U-shaped fork is integrally or fixedly connected to the fork handle. The fork handle is hinged to the hinge seat fixedly connected to the mounting plate. The mounting plate has a shaft hole. The unlocking shaft passes through the shaft hole in the inward and outward directions and is slidably installed in the shaft hole. The unlocking shaft and the shaft hole are sealed. The end of the fork handle is hinged to the unlocking shaft. When the ball is facing the annular limiting groove and the inner convex part is pressing against the ball, the slide is limited in the ejection tube. When the unlocking shaft slides inward and outward, the fork drives the sliding sleeve to move in the inward and outward directions, the ball disengages from the inner convex part, and no longer limits the slide. The piston cylinder has a groove on its inner end face, and a slider is slidably installed in the groove. A limit groove is provided on the outer end face of the slider. An internal thread is machined on the outer end of the inner wall of the piston cylinder. The piston is slidably installed in the piston cylinder within the internal thread. The piston and the piston cylinder are sealed. A limit pin is fixedly connected to or integrally provided on the inner end of the piston. The end face of the limit pin is a slope that slopes outward from left to right. The limit pin is adapted to the limit groove. An end plug is screwed onto the internal thread. A piston spring is installed between the end plug and the piston cylinder. After the slider is limited in the ejection tube by the ball, in its natural state, the piston spring pushes against the piston, causing the limit pin to be located in the limit groove, and the reset elasticity is compressed.

2. The self-resetting door closing mechanism for a micro-hyperbaric oxygen chamber according to claim 1, characterized in that: A lever is fixedly connected to the slider by screws.

3. The self-resetting door closing mechanism for a micro-hyperbaric oxygen chamber according to claim 1, characterized in that: Handles are fixedly connected to both the inner and outer ends of the unlocking shaft.

4. The self-resetting door closing mechanism for a micro-hyperbaric oxygen chamber according to claim 1, characterized in that: The limiting groove is a trapezoidal groove with a large opening and a small bottom.

5. A self-resetting door closing mechanism for a micro-hyperbaric oxygen chamber according to claim 1, characterized in that: The limiting pin is cylindrical.

6. A self-resetting door closing mechanism for a micro-hyperbaric oxygen chamber according to claim 1, characterized in that: A guide rod parallel to the vertical side of the T-shaped slide bar is fixedly connected to the latch, and a guide hole is provided on the ejector seat, through which the guide rod slides.

7. A self-resetting door closing mechanism for a micro-hyperbaric oxygen chamber according to claim 1, characterized in that: The end plug has through holes in both the inner and outer directions.

Images