A medical vacuum negative pressure unit with a set pressure threshold

Abstract

The present invention discloses a medical vacuum negative pressure unit with a set pressure threshold, comprising a supporting base, a first vacuum pump and a supporting plate, wherein the first vacuum pump is fixedly mounted on the outer wall of the supporting base, a connecting tank body is arranged on the side of the first vacuum pump, and the end of the supporting base is fixedly connected to the supporting plate; further comprising: a second vacuum pump fixedly mounted on the top of the supporting plate, and a connecting pipe is connected to the side of the second vacuum pump. The medical vacuum negative pressure unit with a set pressure threshold utilizes a first spring arranged between a blocking block and a movable disk. When the negative pressure in the connecting tank body is high, the blocking block and the first spring are driven to move downward, allowing outside air to enter the connecting tank body through the second groove, thereby achieving the effect of automatically reducing the pressure when the negative pressure in the connecting tank body is high. The initial position of the blocking block and the movable disk can be adjusted by adjusting the connecting screw, so as to achieve the setting of a suitable pressure release threshold according to demand.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum negative pressure units, and in particular to a medical vacuum negative pressure unit with a set pressure threshold. Background Art

[0002] The vacuum negative pressure unit is composed of a vacuum pump, a PLC control box, a gas storage tank, a steam-water separator and a filter. The medical vacuum negative pressure unit mainly uses negative pressure to suction and remove saliva, blood and sputum from patients in hospital operating rooms, ICUs and inpatient beds to assist medical staff in treating patients. The vacuum negative pressure unit has the characteristics of compact structure, easy installation and strong applicability.

[0003] During the operation of a medical vacuum negative pressure unit, when the internal pressure sensing device is damaged, the negative pressure inside the tank will be relatively high due to the continuous operation of the vacuum pump. If the negative pressure inside the tank cannot be released in time, the large negative pressure will make the use of the vacuum unit dangerous. In addition, the vacuum negative pressure unit cannot set the pressure relief threshold according to demand. At the same time, when a fault occurs, the vacuum pump cannot be controlled, and the continuous operation of the vacuum pump will cause a certain amount of energy waste.

[0004] In response to existing problems, it is urgent to innovate based on the original vacuum negative pressure unit. Summary of the Invention

[0005] The purpose of the present invention is to provide a medical vacuum negative pressure unit with a set pressure threshold, so as to solve the problem raised in the above background technology that during the operation of the medical vacuum negative pressure unit, when the internal pressure sensing device is damaged, the negative pressure inside the tank body is relatively large due to the continuous operation of the vacuum pump. If the negative pressure inside the tank body cannot be released in time, the large negative pressure will make the use of the vacuum unit dangerous. In addition, the vacuum negative pressure unit cannot set the pressure relief threshold according to demand. At the same time, when a fault occurs, the vacuum pump cannot be controlled, and the continuous operation of the vacuum pump will cause a certain amount of energy waste.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a medical vacuum negative pressure unit with a set pressure threshold, comprising a supporting base, a first vacuum pump, and a supporting plate, wherein the first vacuum pump is fixedly mounted on the outer wall of the supporting base, a connecting tank is provided on the side of the first vacuum pump, and the supporting plate is fixedly connected to the end of the supporting base;

[0007] A second vacuum pump is fixedly mounted on the top of the supporting plate, and a connecting pipe is connected to the side of the second vacuum pump, and an end of the connecting pipe is connected to the first filter, a control box is provided on the side of the first filter, and a second filter is provided on the outside of the first filter, and a docking pipe is fixedly connected to the outer wall of the second filter;

[0008] A connecting elbow is provided on the outer wall of the connecting tank body, and the end of the connecting elbow is fixedly connected to the connecting shell, and the internal thread of the connecting shell is connected to a connecting screw, the end of the connecting screw is fixedly connected to a movable disk, and a limit block is provided on the outer wall of the movable disk;

[0009] A first groove is formed on the inner wall of the connecting shell, and a second groove is formed at the bottom of the first groove;

[0010] The pressure relief shell is fixedly connected to the outer wall of the connecting shell.

[0011] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, the movable disk and the limit block are integrated, and two limit blocks are symmetrically arranged about the central axis of the movable disk, and the limit blocks are nested inside the first groove.

[0012] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, the bottom of the movable disk is fixedly connected to a first spring, the end of the first spring is fixedly connected to a blocking block, and a connecting rope is provided on the outer wall of the blocking block.

[0013] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, the blocking block forms an elastic telescopic structure with the movable disk through the first spring, and the outer surface of the movable disk is in contact with the outer surface of the connecting shell.

[0014] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, the end of the connecting rope is fixedly connected to a movable part, and a connecting seat is provided on the side of the movable part, and the movable part and the connecting seat are movably connected.

[0015] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, wherein: a positioning ring is welded to the end of the connecting seat, and the positioning ring is nested on the outside of the connecting screw, and a second spring is fixedly connected between the positioning ring and the movable part, and a first metal contact is provided on the side of the second spring, and a first connecting line is provided on the outer wall of the first metal contact.

[0016] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, the outer surface of the first metal contact is bonded to the second metal contact, and the outer wall of the second metal contact is provided with a second connecting line, and the top of the second metal contact is fixedly connected to a support frame, and the support frame and the movable part are both made of insulating material.

[0017] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, the pressure relief shell is movably connected to a movable rod inside, and a connecting through hole is opened on the surface of the pressure relief shell, and two connecting through holes are symmetrically arranged, and at the same time, the end of the movable rod is welded to a docking plate, and the outer surface of the docking plate is in contact with the inner surface of the pressure relief shell.

[0018] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, a positioning rod is welded to the outer wall of the docking plate, and the positioning rod is nested inside the third spring, and the third spring and the positioning rod are symmetrically arranged about the central axis of the docking plate.

[0019] As an optional solution for the medical vacuum negative pressure unit with a set pressure threshold as described in the present invention, the positioning rod passes through the interior of the positioning plate, and the side view of the positioning plate is a circular ring structure, and the positioning plate and the pressure relief shell are welded, and the pressure relief shell and the connecting shell are connected to each other.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The medical vacuum negative pressure unit with a set pressure threshold is provided with a blocking block. A first spring is arranged between the blocking block and the movable disk. When the negative pressure in the connected tank body is high, the blocking block and the first spring are driven to move downward. When the blocking block moves to the second groove, outside air is allowed to enter the connected tank body through the second groove, thereby achieving an effect of automatic pressure reduction when the negative pressure in the connected tank body is high. The initial position of the blocking block and the movable disk can be adjusted by adjusting the connecting screw to achieve the setting of a suitable pressure release threshold according to needs, and the setting operation is relatively simple and convenient.

[0022] 2. The medical vacuum negative pressure unit with a set pressure threshold is provided with a connecting rope. When the blocking block moves downward, the connecting rope is pulled, causing the connecting rope to pull the movable part and the second spring. As the movable part moves, the first metal contact and the second metal contact are separated, and the first connecting line and the second connecting line provided on the first metal contact and the second metal contact are in an open-circuit state. The first connecting line and the second connecting line are both connected to the control box, allowing the control box to control the first vacuum pump and the second vacuum pump to stop running, thereby avoiding the first vacuum pump and the second vacuum pump from being in a running state during the pressure release process, thereby wasting energy;

[0023] 3. The medical vacuum negative pressure unit with a set pressure threshold is provided with a docking plate. When the pressure in the connected tank is high, the movable plate will drive the positioning rod and the third spring to move, and open the circulation channel to allow internal and external air to circulate. As the pressure is released, the third spring will drive the movable plate to reset and block the circulation channel again to isolate the circulation of internal and external air, effectively reducing the rust and damage of components in the connecting shell caused by the constant circulation of internal and external air, thereby reducing the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal connection structure between the connecting housing and the pressure relief housing of the present invention;

[0027] Figure 4 This is a schematic diagram of the connection structure between the connection housing and the first groove of the present invention;

[0028] Figure 5 This is a schematic diagram of the connection structure between the movable disk and the blocking block of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure between the movable part and the positioning ring of the present invention;

[0030] Figure 7 This is a schematic diagram of the connection structure between the pressure relief housing and the docking plate of the present invention;

[0031] Figure 8 It is a schematic diagram of the connection structure between the docking plate and the positioning piece of the present invention.

[0032] In the figure: 1. Support base; 2. First vacuum pump; 3. Connecting tank body; 4. Support plate; 5. Second vacuum pump; 6. Connecting pipe; 7. First filter; 8. Control box; 9. Second filter; 10. Docking pipe; 11. Connecting elbow; 12. Connecting shell; 13. Connecting screw rod; 14. Movable disk; 15. Limit block; 16. First groove; 17. Second groove; 18. First spring; 19. Blocking block; 20. Connecting rope; 21. Movable part; 22. Connecting seat; 23. Positioning ring; 24. Second spring; 25. First metal contact; 26. First connecting line; 27. Second metal contact; 28. Second connecting line; 29. ​​Support frame; 30. Pressure relief shell; 31. Movable rod; 32. Connecting through hole; 33. Docking disk; 34. Positioning rod; 35. Third spring; 36. Positioning piece. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1

[0035] This embodiment is intended to facilitate solving the problem of how to automatically release the pressure when the negative pressure inside the connected tank body 3 is high and to facilitate setting and regulating the pressure release threshold. Figures 1 to 5 The present invention provides a technical solution: a medical vacuum negative pressure unit with a set pressure threshold, comprising a supporting base 1, a first vacuum pump 2 and a supporting plate 4, wherein the first vacuum pump 2 is fixedly mounted on the outer wall of the supporting base 1, a connecting tank 3 is provided on the side of the first vacuum pump 2, and the end of the supporting base 1 is fixedly connected to the supporting plate 4; further comprising: a second vacuum pump 5, fixedly mounted on the top of the supporting plate 4, a connecting pipe 6 is connected to the side of the second vacuum pump 5, and the end of the connecting pipe 6 is connected to a first filter 7, a control box 8 is provided on the side of the first filter 7, a second filter 9 is provided on the outer side of the first filter 7, and a docking pipe 10 is fixedly connected to the outer wall of the second filter 9;

[0036] A connecting elbow 11 is provided on the outer wall of the connecting tank body 3, and the end of the connecting elbow 11 is fixedly connected to the connecting housing 12, and the internal thread of the connecting housing 12 is connected to a connecting screw 13, the end of the connecting screw 13 is fixedly connected to a movable disk 14, and a limit block 15 is provided on the outer wall of the movable disk 14; a first groove 16 is provided on the inner wall of the connecting housing 12, and a second groove 17 is provided at the bottom of the first groove 16; a pressure relief housing 30 is fixedly connected to the outer wall of the connecting housing 12;

[0037] The movable disk 14 and the limit block 15 are integrated, and two limit blocks 15 are symmetrically arranged about the central axis of the movable disk 14, and the limit blocks 15 are nested inside the first groove 16. The bottom of the movable disk 14 is fixedly connected to a first spring 18, and the end of the first spring 18 is fixedly connected to a blocking block 19, and a connecting rope 20 is provided on the outer wall of the blocking block 19. The blocking block 19 forms an elastic telescopic structure with the movable disk 14 through the first spring 18, and the outer surface of the movable disk 14 is in contact with the outer surface of the connecting shell 12.

[0038] First, the control box 8 is used to control the operation of the first vacuum pump 2 and the second vacuum pump 5 to generate a suction force. A connecting pipe 6 is provided on the side of the second vacuum pump 5. The connecting pipe 6 is connected to the first filter 7 and the second filter 9 to filter the air. The air in the connecting tank body 3 is sucked through the connecting pipe 10 to put the connecting tank body 3 in a negative pressure state.

[0039] When the vacuum negative pressure unit fails and causes the interior of the connecting tank body 3 to be in a high negative pressure state, the blocking block 19 inside the connecting shell 12 connected to the connecting tank body 3 will slide in the connecting shell 12, and when the blocking block 19 moves, the first spring 18 will be stretched, and a second groove 17 is provided inside the connecting shell 12, and the second groove 17 is set at an equal angle. When the blocking block 19 moves to the second groove 17, air will circulate between the connecting tank body 3 and the connecting shell 12, thereby reducing the negative pressure in the connecting tank body 3 and achieving the effect of automatic pressure relief when the negative pressure in the connecting tank body 3 is high;

[0040] And by rotating the connecting screw 13 on the connecting shell 12, the connecting screw 13 drives the movable disk 14 and the limit block 15 to move, and there are two limit blocks 15. The limit block 15 is used to slide in the first groove 16 to limit the movement of the movable disk 14, so that the movable disk 14 slides in the connecting shell 12 and drives the blocking block 19 to move, so as to adjust the position of the blocking block 19, and then the blocking block 19 moves to the second groove 17. The required negative pressure is different, which makes it easy to adjust the connecting screw 13 to realize the regulation of the pressure release threshold, and the regulation operation is relatively simple and convenient.

[0041] Example 2

[0042] This embodiment is intended to facilitate solving the problem of how to automatically control the operation of the first vacuum pump 2 and the second vacuum pump 5 while releasing pressure. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1 、 Figure 3 and Figures 5 and 6 , the end of the connecting rope 20 is fixedly connected to the movable part 21, and a connecting seat 22 is provided on the side of the movable part 21, and the movable part 21 and the connecting seat 22 are movably connected, and a positioning ring 23 is welded to the end of the connecting seat 22, and the positioning ring 23 is nested on the outside of the connecting screw rod 13, and a second spring 24 is fixedly connected between the positioning ring 23 and the movable part 21, and a first metal contact 25 is provided on the side of the second spring 24, and a first connecting line 26 is provided on the outer wall of the first metal contact 25, and a second metal contact 27 is fitted on the outer surface of the first metal contact 25, and a second connecting line 28 is provided on the outer wall of the second metal contact 27, and a support frame 29 is fixedly connected to the top of the second metal contact 27, and the support frame 29 and the movable part 21 are both made of insulating materials;

[0043] When the blocking block 19 moves, the blocking block 19 will pull the connecting rope 20 and gradually straighten the connecting rope 20. When the blocking block 19 continues to move downward, the straightened connecting rope 20 will pull the movable part 21, causing the movable part 21 to rotate on the connecting seat 22 and stretch the second spring 24. When the movable part 21 moves, it will drive the first metal contact 25 to move, so that the first metal contact 25 and the second metal contact 27 are separated, and the first metal contact 25 and the second metal contact 27 are respectively connected to the outside of the first metal contact 25 and the second metal contact 27, so that the first connecting line 26 and the second connecting line 28 are in an open circuit state, and the first connecting line 26 and the second connecting line 28 are both connected to the controller in the control box 8. When in the open circuit, the control box 8 controls the first vacuum pump 2 and the second vacuum pump 5 to stop running, so as to avoid the first vacuum pump 2 and the second vacuum pump 5 still being in operation during the pressure release process, causing energy waste.

[0044] Example 3

[0045] This embodiment is intended to promote the solution of the problem of how to block the internal and external air circulation and reduce the corrosion of internal components without releasing the pressure. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1 、 Figure 3 and Figures 7 and 8 The interior of the pressure relief housing 30 is movably connected with a movable rod 31, and a connecting through-hole 32 is opened on the surface of the pressure relief housing 30, and two connecting through-holes 32 are symmetrically arranged. At the same time, the end of the movable rod 31 is welded to a docking plate 33, and the outer surface of the docking plate 33 is in contact with the inner surface of the pressure relief housing 30. A positioning rod 34 is welded to the outer wall of the docking plate 33, and the positioning rod 34 is nested in the interior of the third spring 35, and the third spring 35 and the positioning rod 34 are symmetrically arranged about the central axis of the docking plate 33. The positioning rod 34 passes through the interior of the positioning piece 36, and the side view of the positioning piece 36 is an annular structure, and the positioning piece 36 is welded to the pressure relief housing 30, and the pressure relief housing 30 and the connecting housing 12 are communicated with each other;

[0046] When the air in the connecting shell 12 and the connecting tank body 3 is connected, the connecting shell 12 is in a negative pressure state, which will generate a suction force on the pressure relief shell 30, allowing the docking plate 33 in the pressure relief shell 30 to slide in the pressure relief shell 30, and when the docking plate 33 slides, it will drive the movable rod 31 and the positioning rod 34 to move, and the symmetrically arranged positioning rod 34 is used to limit the movement of the docking plate 33, and when the docking plate 33 moves, it will compress the third spring 35. When the docking plate 33 moves to the vicinity of the positioning piece 36, the inner diameter of the pressure relief shell 30 increases, allowing the connecting shell 12 to be connected with the pressure relief shell 30, and the pressure relief shell 30 is provided with a connecting through hole 32, which is convenient for the internal and external air circulation to achieve a pressure relief effect, and when the pressure is released, the third spring 35 will drive the docking plate 33 to return to its original position, blocking the circulation channel, isolating the connecting shell 12 from the external air circulation, and effectively preventing the components inside the connecting shell 12 from being in contact with the external flowing humid gas for a long time and rusting, thereby achieving the effect of reducing the failure rate.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A medical vacuum negative pressure unit with a set pressure threshold, comprising a support base, a first vacuum pump, and a support plate. The first vacuum pump is fixedly mounted on the outer wall of the support base, a connecting tank is provided on the side of the first vacuum pump, and the support plate is fixedly connected to the end of the support base. It is characterized in that Also includes: A second vacuum pump is fixedly mounted on the top of the supporting plate, and a connecting pipe is connected to the side of the second vacuum pump, and an end of the connecting pipe is connected to the first filter, a control box is provided on the side of the first filter, and a second filter is provided on the outside of the first filter, and a docking pipe is fixedly connected to the outer wall of the second filter; A connecting elbow is provided on the outer wall of the connecting tank body, and the end of the connecting elbow is fixedly connected to the connecting shell, and the internal thread of the connecting shell is connected to the connecting screw, the end of the connecting screw is fixedly connected to the movable disk, and the outer wall of the movable disk is provided with a limit block; A first groove is formed on the inner wall of the connecting shell, and a second groove is formed at the bottom of the first groove; A pressure relief housing fixedly connected to an outer wall of the connection housing; The bottom of the movable disk is fixedly connected to a first spring, the end of the first spring is fixedly connected to a blocking block, and a connecting rope is provided on the outer wall of the blocking block; The end of the connecting rope is fixedly connected to the movable member, and a connecting seat is provided on the side of the movable member, and the movable member and the connecting seat are movably connected; A positioning ring is welded to the end of the connecting seat, and the positioning ring is nested outside the connecting screw, and a second spring is fixedly connected between the positioning ring and the movable part, and a first metal contact is provided on the side of the second spring, and a first connecting wire is provided on the outer wall of the first metal contact; The outer surface of the first metal contact is connected to the second metal contact, and the outer wall of the second metal contact is provided with a second connecting line. The top of the second metal contact is fixedly connected to the support frame, and the support frame and the movable part are both made of insulating material.

2. A medical vacuum negative pressure unit with a set pressure threshold according to claim 1, characterized in that: The movable disk and the limiting block are integrated, and two limiting blocks are symmetrically arranged about the central axis of the movable disk, and the limiting blocks are nested inside the first groove.

3. A medical vacuum negative pressure unit with a set pressure threshold according to claim 2, characterized in that: The blocking block and the movable disk form an elastic telescopic structure through the first spring, and the outer surface of the movable disk is in contact with the outer surface of the connecting shell.

4. A medical vacuum negative pressure unit with a set pressure threshold according to claim 3, characterized in that: The pressure relief shell is internally movably connected to a movable rod, and a connecting through hole is opened on the surface of the pressure relief shell, and two connecting through holes are symmetrically arranged. At the same time, the end of the movable rod is welded to a docking plate, and the outer surface of the docking plate is in contact with the inner surface of the pressure relief shell.

5. A medical vacuum negative pressure unit with a set pressure threshold according to claim 4, characterized in that: A positioning rod is welded to the outer wall of the docking tray, and the positioning rod is nested inside the third spring, and the third spring and the positioning rod are symmetrically arranged about the central axis of the docking tray.

6. A medical vacuum negative pressure unit with a set pressure threshold according to claim 5, characterized in that: The positioning rod passes through the interior of the positioning piece, and the side view of the positioning piece is annular in shape. The positioning piece and the pressure relief housing are welded together, and the pressure relief housing and the connecting housing are connected to each other.

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