CN111529864A

CN111529864A - Mix oxygen valve and have this breathing machine that mixes oxygen valve

Info

Publication number: CN111529864A
Application number: CN202010427522.5A
Authority: CN
Inventors: 王帅; 王晓莉; 唐雪峰
Original assignee: Nanjing Shupu Medical Technology Co ltd
Current assignee: Nanjing Shupu Medical Technology Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-08-14

Abstract

The invention discloses an oxygen mixing valve and a breathing machine with the oxygen mixing valve, and the oxygen mixing valve comprises a first box body, wherein the inner wall of the first box body is fixedly connected with a transverse plate, the left side of the inner cavity of the first box body is fixedly connected with a three-way pipe, the left side of the bottom of the inner cavity of the first box body is fixedly connected with a humidifier, the left side of the bottom of the inner cavity of the first box body, which is positioned on the right side of the humidifier, is fixedly connected with a suction and pressure pump, and the right side of the bottom of the inner cavity of the first box body is fixedly connected. The respirator comprises a first box body, a transverse plate, a three-way pipe, a humidifier, a suction and compression pump, an overvoltage protection valve, a sterilization box, an oxygen mixing valve body, a support rod, a dehydrator and a breathing pump, wherein the first box body is connected with the transverse plate through the first box body.

Description

Mix oxygen valve and have this breathing machine that mixes oxygen valve

Technical Field

The invention relates to the technical field of breathing machines, in particular to an oxygen mixing valve and a breathing machine with the oxygen mixing valve.

Background

In modern clinical medicine, a respirator is used as an effective means for manually replacing an autonomous ventilation function, is widely used for respiratory failure caused by various reasons, anesthesia respiratory management during major operations, respiratory support treatment and emergency resuscitation, and occupies an important position in the modern medical field, the respirator is a vital medical device capable of preventing and treating respiratory failure, reducing complications and saving and prolonging the life of a patient, most of the conventional respirators do not have an oxygen mixing valve, cannot carry out mixed transportation on oxygen and air, easily causes the phenomenon of overhigh or overlow oxygen content, has potential safety hazards, and cannot meet the requirements of the current market.

Disclosure of Invention

The invention aims to provide an oxygen mixing valve and a respirator with the oxygen mixing valve, which have the advantages of the oxygen mixing valve and solve the problem that the conventional respirator does not have the oxygen mixing valve.

In order to achieve the purpose, the invention provides the following technical scheme: mix oxygen valve and have this breathing machine who mixes oxygen valve, including first box, the inner wall fixedly connected with diaphragm of first box, the left side fixedly connected with three-way pipe of first box inner chamber, the left side fixedly connected with humidifier of first box inner chamber bottom, the left side of first box inner chamber bottom and the right side fixedly connected with suction pump that is located the humidifier, the right side fixedly connected with overvoltage protection valve of first box inner chamber bottom, the right side of first box inner chamber bottom and the right side fixedly connected with degerming case that is located overvoltage protection valve, the bottom fixedly connected with on first box inner chamber right side mixes oxygen valve body, the left side fixedly connected with branch at first box inner chamber top, the bottom fixedly connected with dehydrator of branch, the top fixedly connected with breathing pump of diaphragm.

Preferably, the left end of the three-way pipe penetrates through the outside of the first box body and is communicated with a hose, and the left end of the hose is communicated with an oxygen mask.

Preferably, the bottom of the three-way pipe is communicated with a first air conveying pipe, one end, away from the three-way pipe, of the first air conveying pipe is communicated with the left side of the humidifier, the right side of the top of the humidifier is communicated with a second air conveying pipe, one end, away from the humidifier, of the second air conveying pipe is communicated with the top of the overpressure protection valve, the top of the suction and pressure pump is communicated with a first vertical pipe, the top of the first vertical pipe is communicated with the bottom of the second air conveying pipe, and the surface of the second air conveying pipe is sleeved with an air suction valve.

Preferably, the bottom on the right side of the overpressure protection valve is communicated with a first transverse pipe, the right end of the first transverse pipe is communicated with the bottom on the left side of the sterilizing box, the top on the right side of the sterilizing box is communicated with a second transverse pipe, and the right end of the second transverse pipe is communicated with the top on the left side of the oxygen mixing valve body.

Preferably, the top intercommunication on oxygen valve body right side that mixes has the oxygen pipe, the bottom intercommunication on oxygen valve body right side that mixes has the air hose, the right-hand member of oxygen pipe and air hose all runs through to the outside of first box and the cover is equipped with the pipe box.

Preferably, the top of the three-way pipe is communicated with a first exhaust pipe, one end, far away from the three-way pipe, of the first exhaust pipe is communicated with the top of the left side of the dehydrator, a second exhaust pipe is fixedly connected to the top of the right side of the dehydrator, an exhalation valve and a one-way valve are respectively sleeved on the surface of the second exhaust pipe, the one-way valve is located on the right side of the exhalation valve, the right end of the second exhaust pipe penetrates through the outside of the first box body and is provided with a protective net in a sleeved mode, the top of the exhalation pump is communicated with a second vertical pipe, and the top of the second vertical pipe is communicated with the.

Preferably, a groove is formed in the left side of the front top of the first box body, an inner wall fixedly connected with nameplate of the groove, a pressure gauge is fixedly connected to the front top of the first box body, a control panel is fixedly connected to the front right side of the first box body, a display and a button are respectively arranged on the front side of the control panel, an apron is arranged on the back side of the first box body, a bolt penetrates through the surface of the apron, and the first box body and the apron are fixedly connected through the bolt.

Preferably, the bottom of the first box body is fixedly connected with a second box body, and the top of the left side of the second box body is fixedly connected with a junction box.

Preferably, the inner wall of second box has seted up the slot, the inner chamber of slot is provided with the picture peg, the relative one side fixedly connected with backup pad of picture peg, there is the chamber door positive through hinge swing joint of second box, the positive fixedly connected with handle of chamber door, the surface of handle is provided with anti-skidding line.

Preferably, the bottom of the second box body is fixedly connected with a bottom plate, the two sides of the bottom plate are fixedly connected with supporting legs, the bottoms of the supporting legs are movably connected with universal wheels through rotating rods, and braking plates are arranged on the surfaces of the universal wheels.

Compared with the prior art, the invention has the following beneficial effects:

1. the respirator comprises a first box body, a transverse plate, a three-way pipe, a humidifier, a suction pressure pump, an overvoltage protection valve, a sterilization box, an oxygen mixing valve body, a support rod, a dehydrator and a breathing pump, wherein the first box body is connected with the oxygen mixing valve body through the transverse plate, the transverse plate is connected with the first box body through the three-way pipe, the sterilization box is connected with the oxygen mixing valve body through the overpressure protection valve, the support rod is connected with the first box body through the overpressure protection valve, the sterilization box is connected with the oxygen mixing valve body through the sterilization box, and the first box body is connected with the first box body through the ventilation pipe.

2. The invention is used for conveying gas by arranging a hose and an oxygen mask, is used for conveying oxygen by arranging a first gas conveying pipe and a second gas conveying pipe, is used for controlling the conduction state of the second gas conveying pipe by arranging an air suction valve, is used for conveying oxygen by arranging a first transverse pipe and a second transverse pipe, is used for conveying pure oxygen by arranging an oxygen pipe, is used for conveying air by arranging an air pipe, is used for sealing the oxygen pipe and the air pipe by arranging a pipe sleeve, is used for conveying waste gas by arranging a first exhaust pipe and a second exhaust pipe, is used for controlling the conduction state of the second exhaust pipe by arranging an exhalation valve, is used for realizing one-way conduction of air by arranging a one-way valve and avoiding air backflow, is used for preventing sundries from entering the second exhaust pipe by arranging a protective net, and is used for preventing sundries from entering the second exhaust pipe by arranging a groove and a nameplate, is used for marking the specification information of the breathing machine, is convenient for a user to know the breathing machine, and is provided with a pressure gauge, is used for displaying the pressure value in real time, is used for displaying the working state of the breathing machine by arranging a display and is used for displaying the working state of the breathing machine by arranging a key, used for inputting control signals, used for sealing the first box body by arranging a cover plate, used for sealing the second box body by arranging a second box body, used for accommodating related appliances, is used for connecting and transmitting electric energy by arranging a junction box and is provided with a slot and a plug board, used for the back and forth movement of the supporting plate, used for dividing the inner space of the second box body by arranging the supporting plate to realize the layered placement, and used for realizing the layered placement by arranging the box door and the handle, the second box body is used for being sealed, the bottom plate, the supporting legs and the universal wheels are arranged, the respirator is used for being moved, and the braking plate is arranged, so that the universal wheels are limited when the respirator is used.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the structure of the present invention;

FIG. 3 is a rear view of the structure of the present invention;

FIG. 4 is an enlarged view of a portion of the structure A in FIG. 1 according to the present invention.

In the figure: 1. a first case; 2. a transverse plate; 3. a three-way pipe; 4. a humidifier; 5. a suction and pressure pump; 6. an overpressure protection valve; 7. a sterilization box; 8. a main body of the oxygen mixing valve; 9. a strut; 10. a dehydrator; 11. a breath pressure pump; 12. a hose; 13. an oxygen mask; 14. a first gas delivery pipe; 15. a second gas delivery pipe; 16. a first vertical tube; 17. an air intake valve; 18. a first cross tube; 19. a second cross tube; 20. an oxygen tube; 21. an air tube; 22. pipe sleeve; 23. a first exhaust pipe; 24. a second exhaust pipe; 25. an exhalation valve; 26. a one-way valve; 27. a protective net; 28. a second standpipe; 29. a groove; 30. a nameplate; 31. a pressure gauge; 32. a control panel; 33. a display; 34. pressing a key; 35. a cover plate; 36. a second case; 37. a junction box; 38. a slot; 39. inserting plates; 40. a support plate; 41. a box door; 42. a handle; 43. a base plate; 44. a support leg; 45. a universal wheel; 46. a brake plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first box body 1, the transverse plate 2, the three-way pipe 3, the humidifier 4, the suction and pressure pump 5, the overpressure protection valve 6, the sterilization box 7, the oxygen mixing valve body 8, the support rod 9, the dehydrator 10, the expiration pump 11, the hose 12, the oxygen mask 13, the first air pipe 14, the second air pipe 15, the first vertical pipe 16, the air suction valve 17, the first horizontal pipe 18, the second horizontal pipe 19, the oxygen pipe 20, the air pipe 21, the pipe sleeve 22, the first exhaust pipe 23, the second exhaust pipe 24, the expiration valve 25, the one-way valve 26, the protection net 27, the second vertical pipe 28, the groove 29, the nameplate 30, the pressure gauge 31, the control panel 32, the display 33, the key 34, the cover plate 35, the second box body 36, the junction box 37, the slot 38, the insertion plate 39, the support plate 40, the box door 41, the handle 42, the bottom plate 43, the support leg 44, the universal wheel 45 and the brake plate 46 of the invention are all, the specific structure and principle of the device belong to the prior art, and the technical manual can be known by the skilled person.

Referring to fig. 1-4, the oxygen mixing valve and the respirator having the same comprise a first box body 1, a transverse plate 2 fixedly connected to the inner wall of the first box body 1, a three-way pipe 3 fixedly connected to the left side of the inner cavity of the first box body 1, a humidifier 4 fixedly connected to the left side of the bottom of the inner cavity of the first box body 1, a suction and pressure pump 5 fixedly connected to the left side of the bottom of the inner cavity of the first box body 1 and located at the right side of the humidifier 4, an overpressure protection valve 6 fixedly connected to the right side of the bottom of the inner cavity of the first box body 1, a sterilization box 7 fixedly connected to the right side of the overpressure protection valve 6 and located at the right side of the bottom of the inner cavity of the first box body 1, a mixed oxygen valve body 8 fixedly connected to the bottom of the right side of the inner cavity of the first box body 1, a support rod 9 fixedly connected to the left side, the left end of the three-way pipe 3 penetrates to the outside of the first box body 1 and is communicated with a hose 12, the left end of the hose 12 is communicated with an oxygen mask 13, the bottom of the three-way pipe 3 is communicated with a first air conveying pipe 14, one end, away from the three-way pipe 3, of the first air conveying pipe 14 is communicated with the left side of the humidifier 4, the right side of the top of the humidifier 4 is communicated with a second air conveying pipe 15, one end, away from the humidifier 4, of the second air conveying pipe 15 is communicated with the top of the overpressure protection valve 6, the top of the suction and compression pump 5 is communicated with a first vertical pipe 16, the top of the first vertical pipe 16 is communicated with the bottom of the second air conveying pipe 15, the surface of the second air conveying pipe 15 is sleeved with an air suction valve 17, the bottom on the right side of the overpressure protection valve 6 is communicated with a first transverse pipe 18, the right end of the first transverse pipe 18 is communicated with the bottom on the left side of the sterilizing box 7, the, the top of the right side of the oxygen mixing valve body 8 is communicated with an oxygen pipe 20, the bottom of the right side of the oxygen mixing valve body 8 is communicated with an air pipe 21, the right ends of the oxygen pipe 20 and the air pipe 21 both penetrate through the outside of the first box body 1 and are sleeved with a pipe sleeve 22, the top of the three-way pipe 3 is communicated with a first exhaust pipe 23, one end of the first exhaust pipe 23, which is far away from the three-way pipe 3, is communicated with the top of the left side of the dehydrator 10, the top of the right side of the dehydrator 10 is fixedly connected with a second exhaust pipe 24, the surface of the second exhaust pipe 24 is respectively sleeved with an expiratory valve 25 and a one-way valve 26, the one-way valve 26 is positioned on the right side of the expiratory valve 25, the right end of the second exhaust pipe 24 penetrates through the outside of the first box body 1 and is sleeved with a protective net 27, the top of the expiratory pump 11, the inner wall of the groove 29 is fixedly connected with a nameplate 30, the top of the front of the first box body 1 is fixedly connected with a pressure gauge 31, the right side of the front of the first box body 1 is fixedly connected with a control panel 32, the front of the control panel 32 is respectively provided with a display 33 and a key 34, the back of the first box body 1 is provided with a cover plate 35, the surface of the cover plate 35 is provided with a bolt in a penetrating way, the first box body 1 is fixedly connected with the cover plate 35 through the bolt, the bottom of the first box body 1 is fixedly connected with a second box body 36, the top of the left side of the second box body 36 is fixedly connected with a junction box 37, the inner wall of the second box body 36 is provided with a slot 38, the inner cavity of the slot 38 is provided with an inserting plate 39, the opposite side of the inserting plate 39 is fixedly connected with a support plate 40, the bottom of the second box 36 is fixedly connected with a bottom plate 43, two sides of the bottom plate 43 are fixedly connected with supporting legs 44, the bottom of each supporting leg 44 is movably connected with a universal wheel 45 through a rotating rod, a braking plate 46 is arranged on the surface of the universal wheel 45, the supporting legs are used for conveying gas through arranging a hose 12 and an oxygen mask 13, the supporting legs are used for conveying oxygen through arranging a first air conveying pipe 14 and a second air conveying pipe 15, the supporting legs are used for conveying oxygen through arranging an air suction valve 17, the guiding state of the second air conveying pipe 15 is controlled, the oxygen is conveyed through arranging a first transverse pipe 18 and a second transverse pipe 19, the oxygen is conveyed through arranging an oxygen pipe 20, the air pipe 21 is used for conveying air, the oxygen pipe 20 and the air pipe 21 are sealed through arranging a pipe sleeve 22, and the waste gas is conveyed through arranging a first exhaust pipe 23 and a second exhaust pipe 24, by arranging the expiratory valve 25 for controlling the conduction state of the second exhaust pipe 24, by arranging the one-way valve 26 for realizing the one-way conduction of air and avoiding air backflow, by arranging the protective net 27 for preventing sundries from entering the second exhaust pipe 24, by arranging the groove 29 and the nameplate 30 for marking the specification information of the breathing machine, a user can conveniently know the breathing machine, by arranging the pressure gauge 31 for displaying the pressure value in real time, by arranging the display 33 for displaying the working state of the breathing machine, by arranging the key 34 for inputting a control signal, by arranging the cover plate 35 for sealing the first box body 1, by arranging the second box body 36 for accommodating related appliances, by arranging the junction box 37 for connecting and conveying electric energy, by arranging the slot 38 and the inserting plate 39 for the back and forth movement of the supporting plate 40, by providing the supporting plate 40 for dividing the inner space of the second casing 36 to realize the layered arrangement, by providing the door 41 and the handle 42, for sealing the second casing 36, by providing the bottom plate 43, the legs 44 and the universal wheels 45, for moving the ventilator, by providing a stop plate 46, for limiting the universal wheel 45 in use, the purpose of having the oxygen mixing valve is realized through the matching of the first box body 1, the transverse plate 2, the three-way pipe 3, the humidifier 4, the suction and pressure pump 5, the overpressure protection valve 6, the sterilization box 7, the oxygen mixing valve body 8, the support rod 9, the dehydrator 10 and the expiration and pressure pump 11, oxygen and air can be mixed and conveyed, the phenomenon of overhigh or overlow oxygen content is effectively avoided, thereby eliminating potential safety hazards, meeting the requirements of the current market, improving the practicability and usability of the breathing machine and solving the problem that the breathing machine does not have an oxygen mixing valve in the past.

When the respirator is used, when the inhalation valve 17 is opened and the exhalation valve 25 is closed, pure oxygen is conveyed through the oxygen pipe 20, air is conveyed through the air pipe 21, oxygen and air are mixed and conveyed through the oxygen mixing valve body 8, bacteria in the oxygen are removed through the sterilization box 7, overpressure protection is performed through the overpressure protection valve 6, the safety of the respirator in use is improved, the oxygen is humidified through the humidifier 4, the oxygen is conveyed to the hose 12 through the three-way pipe 3, the oxygen is conveyed to the oxygen mask 13 through the hose 12, inhalation is realized, when the inhalation valve 17 is closed and the exhalation valve 25 is opened, waste gas is conveyed to the hose 12 through the oxygen mask 13, the waste gas is conveyed to the three-way pipe 3 through the hose 12, the waste gas is conveyed to the dehydrator 10 through the three-way pipe 3, the waste gas is dried through the dehydrator 10, and the waste gas is discharged through the second exhaust pipe 24, the exhaust is realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Mix oxygen valve and have this breathing machine of mixing oxygen valve, including first box (1), its characterized in that: the inner wall of the first box body (1) is fixedly connected with a transverse plate (2), the left side of the inner cavity of the first box body (1) is fixedly connected with a three-way pipe (3), the left side of the inner cavity bottom of the first box body (1) is fixedly connected with a humidifier (4), the left side of the inner cavity bottom of the first box body (1) is fixedly connected with a suction and compression pump (5) positioned on the right side of the humidifier (4), the right side of the inner cavity bottom of the first box body (1) is fixedly connected with an overvoltage protection valve (6), the right side of the inner cavity bottom of the first box body (1) is fixedly connected with a sterilization box (7) positioned on the right side of the overvoltage protection valve (6), the bottom of the right side of the inner cavity of the first box body (1) is fixedly connected with an oxygen mixing valve body (8), the left side of the inner cavity top of the first box body (1) is, the top of the transverse plate (2) is fixedly connected with a breath pump (11).

2. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 1 are characterized in that: the left end of the three-way pipe (3) penetrates through the outside of the first box body (1) and is communicated with a hose (12), and the left end of the hose (12) is communicated with an oxygen mask (13).

3. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 1 are characterized in that: the bottom intercommunication of three-way pipe (3) has first air-supply pipe (14), the one end that three-way pipe (3) were kept away from in first air-supply pipe (14) communicates with the left side of humidifier (4), the right side intercommunication at humidifier (4) top has second air-supply pipe (15), the one end that humidifier (4) were kept away from in second air-supply pipe (15) communicates with the top of overvoltage protection valve (6), the top intercommunication of suction and compression pump (5) has first standpipe (16), the top of first standpipe (16) communicates with the bottom of second air-supply pipe (15), the surface cover of second air-supply pipe (15) is equipped with air suction valve (17).

4. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 1 are characterized in that: the bottom on the right side of the overpressure protection valve (6) is communicated with a first transverse pipe (18), the right end of the first transverse pipe (18) is communicated with the bottom on the left side of the sterilizing box (7), the top on the right side of the sterilizing box (7) is communicated with a second transverse pipe (19), and the right end of the second transverse pipe (19) is communicated with the top on the left side of the oxygen mixing valve body (8).

5. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 1 are characterized in that: mix oxygen valve body (8) right side top intercommunication and have oxygen hose (20), mix oxygen valve body (8) right side bottom intercommunication and have air hose (21), the right-hand member of oxygen hose (20) and air hose (21) all runs through to the outside of first box (1) and the cover is equipped with pipe box (22).

6. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 1 are characterized in that: the top of three-way pipe (3) communicates with first blast pipe (23), the one end that three-way pipe (3) were kept away from in first blast pipe (23) communicates with the left top of dehydrator (10), top fixedly connected with second blast pipe (24) on dehydrator (10) right side, the surface of second blast pipe (24) is overlapped respectively and is equipped with expiratory valve (25) and check valve (26), check valve (26) are located the right side of expiratory valve (25), the right-hand member of second blast pipe (24) is run through to the outside of first box (1) and is equipped with protection network (27), the top of expiratory pump (11) communicates with second standpipe (28), the top of second standpipe (28) communicates with the bottom of second blast pipe (24).

7. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 1 are characterized in that: the left side at the positive top of first box (1) is seted up fluted (29), inner wall fixedly connected with data plate (30) of recess (29), positive top fixedly connected with manometer (31) of first box (1), the positive right side fixedly connected with control panel (32) of first box (1), the front of control panel (32) is provided with display (33) and button (34) respectively, the back of first box (1) is provided with apron (35), the surface of apron (35) is run through and is provided with the bolt, first box (1) and apron (35) are through bolt fixed connection.

8. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 1 are characterized in that: the bottom of the first box body (1) is fixedly connected with a second box body (36), and the top of the left side of the second box body (36) is fixedly connected with a junction box (37).

9. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 8 are characterized in that: slot (38) have been seted up to the inner wall of second box (36), the inner chamber of slot (38) is provided with picture peg (39), picture peg (39) relative one side fixedly connected with backup pad (40), there is chamber door (41) in the front of second box (36) through hinge swing joint, the front fixedly connected with handle (42) of chamber door (41), the surface of handle (42) is provided with anti-skidding line.

10. The oxygen mixing valve and the breathing machine with the oxygen mixing valve according to claim 8 are characterized in that: the bottom fixedly connected with bottom plate (43) of second box (36), equal fixedly connected with landing leg (44) in both sides of bottom plate (43) bottom, there are universal wheel (45) bottom of landing leg (44) through bull stick swing joint, the surface of universal wheel (45) is provided with braking plate (46).