Oil pressure measuring mechanism based on sphygmomanometer pressure measuring principle

Abstract

The invention relates to the field of oil pressure measurement, in particular to an oil pressure measuring mechanism based on a sphygmomanometer pressure measuring principle, two ends of an elastic tube are communicated with an oil tube, and fixing rings fixedly sleeve two sides of the elastic tube on the oil tube; the tops of the fixing rings on the two sides are connected with a first fixing base, a pressure measuring instrument is installed on the first fixing base, and an air pump and a pressure sensor are arranged in the pressure measuring instrument. The elastic pipe is arranged in the oil pipe of the oil way, normal use of the elastic pipe in the oil way can be guaranteed through the arrangement of the limiting ring piece, detection of the elastic pipe can be achieved through control over the inflation measuring sleeve by the pressure measuring instrument, detection of the pressure in the oil way is achieved, a window does not need to be formed in the oil way in the detection mode, and the detection efficiency is improved. The sealing performance of the oil way is guaranteed, and the push ring can be moved through the arrangement of the adjusting assembly, so that the working state and the detection state of the elastic pipe can be conveniently replaced.

Description

Technical Field

[0001] The invention relates to the technical field of oil pressure measurement, and in particular to an oil pressure measurement mechanism based on the pressure measurement principle of a sphygmomanometer. Background Art

[0002] The oil pressure measuring mechanism is a device used to detect oil pressure, usually referring to a device used to measure the oil pressure in the oil pipe. The working principle of the traditional pressure measuring joint is realized through an internal self-sealing valve. When used alone, the self-sealing valve is in a closed state under the action of a spring to prevent fluid leakage. When it is connected to a measuring hose or joint with a ejector pin, the self-sealing valve is pushed open to allow fluid to pass through, which is used for sampling and pressure testing of high-pressure or low-pressure fluid systems.

[0003] The oil pressure measuring mechanism of this structure needs to open a window on the oil pipe, which reduces the sealing performance of the oil pipe. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose an oil pressure measuring mechanism based on the pressure measuring principle of a sphygmomanometer.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The oil pressure measuring mechanism based on the pressure measuring principle of a sphygmomanometer comprises an oil pipe, an elastic pipe and a pressure measuring instrument, both ends of the elastic pipe are connected to the oil pipe, and the oil pipe is fixedly sleeved with fixing rings on both sides of the elastic pipe; The tops of the fixing rings on both sides are connected to the first fixing seat, a pressure gauge is installed on the first fixing seat, and an air pump and a pressure sensor are arranged in the pressure gauge; The oil pipe is provided with push rings on both sides of the elastic tube, and the push rings are fixed with limit rings, and the limit rings are located outside the elastic tube and are movable; The side surfaces of the fixing rings on both sides are connected to the second fixing seat, a through cavity is formed in the middle of the second fixing seat, an inflatable measuring sleeve is sleeved on the outer side of the elastic tube, a pull cloth is connected to one end of the inflatable measuring sleeve, the pull cloth passes through the through cavity, and the air pump is connected to the inflatable measuring sleeve through a rubber air tube; A top plate is fixedly arranged above the second fixing seat, an elastic band is fixedly connected to the pull cloth, and the other end of the elastic band is connected to the top plate; The oil pipe is fixedly sleeved with a sub-liquid ring and a mother-liquid ring between the fixed ring and the push ring, and the sub-liquid ring and the mother-liquid ring push the push ring back and forth through the sub-flexible liquid bag and the mother-flexible liquid bag respectively.

[0006] In addition, a preferred structure is that a protective cover is installed on the oil pipe on the outside of the elastic tube, the oil pipe and the elastic tube are connected and have the same wall thickness, a plurality of guide parts are fixedly provided on both sides of the elastic tube on the oil pipe, and guide cavities are provided on the inner walls of the convex ring and the limiting ring sheet corresponding to the guide parts.

[0007] In addition, a preferred structure is that the inflatable measuring sleeve is arranged on the outside of the elastic tube, a fixing rod is fixedly connected between the fixing rings on both sides, one end of the inflatable measuring sleeve is fixedly connected to the fixing rod, and a connecting frame is fixedly arranged on the fixing rod.

[0008] In addition, a preferred structure is that a pull cloth is fixedly connected to the other end of the inflation measuring sleeve, the pull cloth passes through the connecting frame and the through cavity in sequence and is connected to the elastic band, and fleece-surface Velcro is provided on both sides of the pull cloth.

[0009] In addition, a preferred structure is that fixed columns are vertically fixed upward on both sides of the top of the second fixed seat, the tops of the fixed columns on both sides are connected to the top plate, guide frames are fixed on the side walls on both sides of the fixed columns, and two splints are movably arranged between the fixed columns on both sides.

[0010] In addition, a preferred structure is that a fixing block is fixedly arranged between the clamping plates on both sides of the side wall of the fixing column, a plurality of guide columns are fixedly arranged vertically on both sides of the fixing block, and the clamping plates are guided and moved by the guide columns; A through hole is formed in the middle of the fixing block, and a spring is installed in the through hole. Both ends of the spring are connected to the splints. Hook-surface Velcro is provided on the inner wall of the splint to match the fleece-surface Velcro on the pull cloth, and fixing frames are fixed on the outer sides of the splints on both sides.

[0011] In addition, a preferred structure is that an adjustment assembly is arranged above the second fixing seat, and the adjustment assembly includes two movable parts, and the two movable parts pass through the guide frame and the fixing frame on both sides respectively, and the middle part of the movable parts is provided with a notch through a slope transition; The ends of the movable parts on both sides are fixedly connected to the end plates, the tops of the end plates on both sides are fixedly and vertically provided with connecting plates, the tops of the connecting plates are vertically provided with two push columns, and the ends of the push columns are fixedly provided with push plates.

[0012] In addition, a preferred structure is that two sub-fixing sleeves and a female fixing sleeve are respectively provided on both sides of the top of the top plate, and an entrance is opened on the outer side of the sub-fixing sleeve and the female fixing sleeve, and the push plate enters the sub-fixing sleeve and the female fixing sleeve through the entrance; Flexible liquid storage bags are installed inside the sub-fixing sleeve and the female fixing sleeve, and the ends of the flexible liquid storage bags in the two sub-fixing sleeves are respectively connected with the first sub-connecting tube and the second sub-connecting tube, and the ends of the flexible liquid storage bags in the two female fixing sleeves are respectively connected with the first female connecting tube and the second female connecting tube, and the connecting tubes in the flexible liquid storage bags extend from the ends of the fixing sleeves.

[0013] In addition, a preferred structure is that the first sub-connecting tube and the second sub-connecting tube are respectively connected to the sub-liquid rings on both sides, the first mother connecting tube and the second mother connecting tube are respectively connected to the mother liquid rings on both sides, and a plurality of sub-connecting columns and mother connecting columns are fixedly arranged on the outer sides of the sub-liquid rings and the mother liquid rings.

[0014] In addition, a preferred structure is that a plurality of partitions are fixedly arranged on the outer side of the push ring, and a female flexible liquid capsule is connected and arranged on each of the female connecting columns, and the other end of each of the female flexible liquid capsules is fixedly connected to the partition; The sub-connecting columns are all fixedly connected with sub-fixed tubes, the other ends of the sub-fixed tubes are connected with sub-flexible liquid bags, and the other ends of the sub-flexible liquid bags are connected with the other side of the partition.

[0015] The beneficial effects of the present invention are as follows: an elastic tube is arranged in the oil pipe of the oil circuit, and the setting of a limit ring can ensure the normal use of the elastic tube in the oil circuit. The elastic tube can be detected by controlling the inflatable measuring sleeve by the pressure gauge to detect the pressure in the oil circuit. This detection method does not require opening a window in the oil circuit, thereby ensuring the sealing of the oil circuit. Moreover, by adjusting the setting of the component, the push ring can be moved to facilitate the replacement of the working state and the detection state of the elastic tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of an oil pressure measuring mechanism based on the pressure measuring principle of a sphygmomanometer proposed by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure when a protective cover is installed on the oil pipe; Figure 3 It is a schematic diagram of the structure of the oil pipe, elastic pipe, fixing ring and push ring proposed in the present invention; Figure 4 for Figure 3 A schematic diagram of the structure when the push rings on both sides move toward the middle; Figure 5 It is a schematic diagram of the structure of the push ring and the limit ring piece proposed in the present invention; Figure 6 It is a schematic diagram of the structure of the oil pipe, the fixing ring and the inflatable measuring sleeve proposed in the present invention; Figure 7 It is a structural schematic diagram of the inflatable measuring sleeve proposed in the present invention; Figure 8 It is a schematic diagram of the structure above the second fixing seat proposed in the present invention; Fig. 9 for Figure 8 Schematic diagram of the exploded structure of the fixing block and the clamping plate; Fig.10 It is a structural schematic diagram of the regulating component proposed in the present invention; Fig.11 It is a schematic diagram of the structure of the sub-fixing sleeve and the main fixing sleeve proposed in the present invention; Fig.12 It is a schematic diagram of the internal structure of the sub-fixing sleeve proposed in the present invention; Fig.13 It is a schematic diagram of the structure of the sub-liquid ring, the mother liquid ring, the push ring, the sub-fixed sleeve and the mother fixed sleeve proposed in the present invention; Fig.14 It is a schematic diagram of the back structure of the sub-liquid ring, the mother liquid ring and the push ring proposed in the present invention; Fig.15 for Fig.14 Schematic diagram of the structure when the push ring moves toward the middle.

[0017] In the figure: 1 oil pipe, 11 protective cover, 12 elastic tube, 13 guide member, 2 fixing ring, 21 first fixing seat, 22 pressure gauge, 221 rubber air pipe, 23 second fixing seat, 231 through cavity, 24 fixing column, 241 top plate, 242 guide frame, 25 movable member, 250 notch, 251 end plate, 252 connecting plate, 253 push column, 254 push plate, 26 fixing block, 261 through hole, 262 spring, 263 guide column, 27 splint, 271 hook surface Velcro, 272 fixing frame , 3 inflatable measuring sleeve, 31 pull cloth, 311 fleece Velcro, 32 elastic band, 33 fixing rod, 331 connecting frame, 4 sub-liquid ring, 41 sub-connecting column, 411 sub-fixing tube, 412 sub-flexible liquid capsule, 5 mother liquid ring, 51 mother connecting column, 511 mother flexible liquid capsule, 6 push ring, 61 limit ring piece, 62 partition, 63 guide cavity, 7 sub-fixing sleeve, 71 first sub-connecting tube, 72 second sub-connecting tube, 8 mother fixing sleeve, 81 first mother connecting tube, 82 second mother connecting tube, 9 flexible liquid storage capsule. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] See also Figure 1-3, both ends of the elastic tube 12 are connected to the oil pipe 1, so that the sealing of the oil circuit is ensured, and the internal pressure of the oil circuit can be measured without opening a window on the oil pipe 1. When the oil circuit is in normal use, the push rings 6 on both sides can drive the limit ring piece 61 to move to the outside of the elastic tube 12. Thereby, when the oil circuit is in use, the elastic tube 12 can be prevented from expanding outward due to the pressure inside the tube, so as to ensure the normal operation of the elastic tube 12 in the oil circuit. When it is necessary to detect the pressure in the oil circuit, it is only necessary to control the push rings 6 on both sides to drive the limit ring piece 61 to move outward, and at this time, the elastic tube 12 can be detected through the inflatable measuring sleeve 3 to realize the measurement of the pressure inside the oil circuit. By adjusting the setting of the component, the limit ring piece 61 can be controlled to be located outside the elastic tube 12, or to leave from the outside of the elastic tube 12, so as to realize the control of the working state and measurement state of the elastic tube 12.

[0020] A protective cover 11 is provided on the oil pipe 1 outside the elastic pipe 12, and the protective cover 11 can prevent the elastic pipe 12 from being damaged by external forces. The protective cover 11 can be opened to facilitate the user to monitor the pressure in the pipe.

[0021] See also Figure 3-6 , the oil pipe 1 is provided with a fixed ring 2 on both sides of the elastic tube 12, the top of the fixed ring 2 is fixedly connected to the first fixed seat 21, and the top of the first fixed seat 21 is provided with a pressure gauge 22. The pressure gauge 22 is provided with an air pump and a pressure sensor inside, the air pump is connected to the inflation measuring sleeve 3 through a rubber air tube 221, and the pressure sensing surface of the pressure sensor is connected to the rubber air tube 221. It is worth noting that the specific structure and working mode of the air pump and the pressure sensor are all prior art, so they are not elaborated.

[0022] When measuring the pressure inside the oil circuit, the air pump first inflates the inflatable measuring sleeve 3 through the rubber air tube 221, so that the elastic tube 12 can be squeezed by the inflatable measuring sleeve 3, so that the elastic tube 12 can be compressed. Then, as the inflatable measuring sleeve 3 is gradually deflated, the oscillation wave in the oil circuit is collected by the pressure sensor. Finally, the corresponding pressure point in the process of obstruction in the oil circuit is identified by the embedded software in the pressure gauge 22, and the pressure value inside the oil circuit is obtained according to the software algorithm accumulated by experience.

[0023] The specific algorithm formula can be derived from the algorithm principle of the oscillometric sphygmomanometer. According to the change of the oscillation wave, the pressure and fluctuation detected by the pressure sensor also change accordingly. The moment of the largest fluctuation is selected as the reference point. Based on this point, the fluctuation point of a certain value forward is found as the highest value of the oil pressure, and the fluctuation point of a certain value backward is found as the lowest value of the oil pressure. It is worth noting that the algorithm principle of the oscillometric sphygmomanometer is common knowledge, so it will not be elaborated on.

[0024] Among them, multiple guide members 13 are fixedly arranged on both sides of the elastic tube 12 on the oil pipe 1, and guide cavities 63 are adapted and opened on the inner walls of the push ring 6 and the limit ring piece 61 corresponding to the guide members 13. Through the adaptation setting between the guide members 13 and the guide cavity 63, the push ring 6 and the limit ring piece 61 can be guided when they move.

[0025] See also Figure 6-7 A second fixing seat 23 is fixedly connected between the fixing rings 2 on both sides, and a through cavity 231 is vertically penetrated in the middle of the second fixing seat 23. The inflatable measuring sleeve 3 is sleeved on the outside of the elastic tube 12, and a fixing rod 33 is fixedly connected to one end of the inflatable measuring sleeve 3, and a connecting frame 331 is fixedly arranged on the fixing rod 33.

[0026] Both ends of the fixing rod 33 are fixedly connected to the fixing ring 2, and the fixing rod 33 passes through the sub-liquid ring 4, the mother liquid ring 5 and the push ring 6, and the sub-liquid ring 4, the mother liquid ring 5 and the push ring 6 are all equipped with cavities corresponding to the fixing rod 33 to facilitate the fixing rod 33 to pass through, and the cavity will not affect the sealing of the sub-liquid ring 4 and the mother liquid ring 5.

[0027] The other end of the inflatable measuring sleeve 3 is provided with a pull cloth 31, and after the other end of the inflatable measuring sleeve 3 is wound around the elastic tube 12, the pull cloth 31 passes through the connecting frame 331 and the through cavity 231 in sequence. Velvet Velcro 311 is fixedly provided on both sides of the pull cloth 31, and an elastic band 32 is fixedly provided on the other end of the pull cloth 31, and the other end of the elastic band 32 is fixedly connected to the bottom of the top plate 241.

[0028] See also Figure 8-10 Fixed columns 24 are vertically fixed upward on both sides of the top of the second fixed seat 23, and the tops of the fixed columns 24 on both sides are connected to the top plate 241. Guide frames 242 are fixedly arranged on the side walls on both sides of the fixed columns 24. Through the setting of the guide frames 242, the movable parts 25 on both sides can be guided when moving.

[0029] Two clamping plates 27 are movably arranged between the two side fixing columns 24, and the clamping plates 27 on both sides are guided and moved by the guide columns 263 on both sides of the fixing block 26. The ends of the guide columns 263 are fixedly provided with anti-dropping parts to prevent the clamping plates 27 from falling off from the guide columns 263.

[0030] A through hole 261 is provided in the middle of the fixing block 26, and a spring 262 is provided in the through hole 261, and both ends of the spring 262 are connected to the clamping plate 27. By providing the spring 262, the clamping plates 27 on both sides can be pulled toward the middle, so that the clamping plate 27 can clamp the cloth 31 passing through the through cavity 231. In addition, hook-surface Velcro 271 is provided on the inner wall of the clamping plates 27 on both sides, and the clamping effect between the clamping plates 27 on both sides and the cloth 31 can be further improved by the adaptation between the hook-surface Velcro 271 and the fur-surface Velcro 311. It is worth noting that the thickness of the fixing block 26 is less than the thickness of the cloth 31, so that when the clamping plates 27 on both sides are clamped, the distance between the clamping plates 27 on both sides is less than the thickness of the cloth 31, so that the clamping of the clamping plates 27 to the cloth 31 can be achieved.

[0031] The adjustment assembly includes two movable members 25 , which are guided and moved by guide frames 242 on both sides of the fixed column 24 , and the movable members 25 pass through the fixed frame 272 on the clamping plate 27 .

[0032] By moving the adjustment assembly horizontally, the two movable members 25 and the end plate 251 can be driven to move. When the movable member 25 is located in the middle, the notch 250 in the middle of the movable member 25 contacts the fixed frame 272. When the movable member 25 moves to the left and right sides, the notch 250 will no longer contact the fixed frame 272, and the fixed frames 272 on both sides can be driven to move outwards by the movable member 25. At this time, the movement of the fixed frames 272 on both sides can drive the clamping plates 27 to move, so that the clamping plates 27 on both sides can be separated outwards, so that the clamping of the clamping plates 27 on both sides to the cloth 31 can be released.

[0033] When the movable part 25 is reset again, the notch 250 moves into the fixing frame 272 again. Since the notch 250 cannot push the fixing frame 272 outward, the clamps 27 on both sides can be automatically reset by the springs 262 at this time, so that the cloth 31 can be clamped again.

[0034] See also Figure 10-12 A connecting plate 252 is fixedly and vertically arranged on the top of the end plates 251 on both sides, two push columns 253 are fixedly and vertically arranged on the connecting plate 252, and a push plate 254 is fixedly arranged on the end of the push column 253.

[0035] Two sub-fixing sleeves 7 and a female fixing sleeve 8 are fixedly arranged on both sides of the top of the top plate 241, and flexible liquid storage capsules 9 are arranged in the sub-fixing sleeves 7 and the female fixing sleeves 8. An inlet is opened on the end of the sub-fixing sleeve 7 and the female fixing sleeve 8 facing the push plate 254, and the push plate 254 enters the sub-fixing sleeve 7 or the female fixing sleeve 8 from the inlet and pushes and compresses the flexible liquid storage capsule 9.

[0036] The flexible liquid storage bags 9 are fixedly connected to the other end of the sub-fixing sleeve 7 or the mother fixing sleeve 8, and the flexible liquid storage bags 9 in the sub-fixing sleeve 7 are respectively connected with the first sub-connecting tube 71 and the second sub-connecting tube 72, and the flexible liquid storage bags 9 in the mother fixing sleeve 8 are respectively connected with the first mother connecting tube 81 and the second mother connecting tube 82.

[0037] The first sub-connecting tube 71 and the second sub-connecting tube 72 both extend from the sub-fixing sleeve 7 and communicate with the sub-liquid rings 4 on both sides of the oil pipe 1, and the first mother connecting tube 81 and the second mother connecting tube 82 both extend from the mother fixing sleeve 8 and communicate with the mother liquid rings 5 ​​on both sides of the oil pipe 1. When the adjustment component moves to the left, the push plate 254 on one side pushes and compresses the flexible liquid storage bag 9 in the sub-fixing sleeve 7, and the push plate 254 on the other side leaves the mother fixing sleeve 8. When the adjustment component moves to the right, the push plate 254 on one side pushes and compresses the flexible liquid storage bag 9 in the mother fixing sleeve 8, and the push plate 254 on the other side leaves the sub-fixing sleeve 7.

[0038] See also Figure 1 , 13 -15, the sub-liquid ring 4 and the mother liquid ring 5 are fixedly sleeved on the oil pipe 1 and are located on one side of the fixed ring 2. The sub-liquid ring 4 and the mother liquid ring 5 are both provided with liquid cavities, which are filled with liquid, and the liquid cavities in the sub-liquid ring 4 and the mother liquid ring 5 are respectively connected with the flexible liquid storage bag 9 in the sub-fixed sleeve 7 or the mother fixed sleeve 8 through the first sub-connecting pipe 71, the second sub-connecting pipe 72, the first mother connecting pipe 81 or the second mother connecting pipe 82.

[0039] The sub-liquid ring 4 and the mother liquid ring 5 are both fixedly connected with a sub-connecting column 41 and a mother connecting column 51, the sub-connecting column 41 is fixedly connected with a sub-fixed tube 411, the sub-fixed tube 411 is connected with a sub-flexible liquid capsule 412, and the other end of the sub-flexible liquid capsule 412 is connected to one side of the partition 62 on the push ring 6. The mother connecting column 51 is connected with a mother flexible liquid capsule 511, and the other end of the mother flexible liquid capsule 511 is connected to the other side of the partition 62.

[0040] When the sub-liquid ring 4 is injected with liquid, the sub-flexible liquid capsule 412 bulges outwards, and the sub-flexible liquid capsule 412 can push the partition 62, thereby pushing the push rings 6 on both sides outwards. When the mother liquid ring 5 is injected with liquid, the mother flexible liquid capsule 511 bulges outwards, and the partition 62 can be pushed in the opposite direction by the mother flexible liquid capsule 511, thereby pushing the push rings 6 on both sides inwards.

[0041] In this embodiment, the oil pipe 1 is located on both sides of the elastic tube 12. The pressure gauge 22 can control the inflation measuring sleeve 3 to detect the elastic tube 12, so as to measure the pressure inside the oil circuit.

[0042] When the user needs to measure the pressure inside the oil circuit, he only needs to open the protective cover 11 and then push the adjustment assembly to the left. In this way, the movable members 25 on both sides can be moved to the left. At this time, the notch 250 in the middle of the movable member 25 no longer contacts the fixing frame 272, but the fixing frame 272 is directly pushed outward by the movable member 25. At this time, the spring 262 is stretched, and the clamping plates 27 on both sides are moved outward through the fixing frame 272, so that the clamping of the clamping plates 27 on both sides to the cloth 31 can be released.

[0043] As the adjustment component moves to the left, the push plates 254 on both sides above the adjustment component also move to the left synchronously, so that the two push plates 254 on the right side can move into the sub-fixing sleeve 7 and push and compress the flexible liquid storage bag 9 in the sub-fixing sleeve 7, while the two push plates 254 on the left side leave the mother fixing sleeve 8.

[0044] By compressing the flexible liquid storage bag 9 in the sub-fixing sleeve 7, the liquid in the two flexible liquid storage bags 9 on this side can be transported to the sub-liquid rings 4 on both sides through the first sub-connecting tube 71 and the second sub-connecting tube 72. At this time, the liquid in the sub-liquid ring 4 can be sent to the sub-flexible liquid bag 412 through the sub-connecting column 41 and the sub-fixing tube 411. At this time, the sub-flexible liquid bag 412 gradually bulges due to the filling of liquid, so that the sub-flexible liquid bag 412 can push the partition 62 to realize the movement of the push ring 6, so that the push rings 6 on both sides can be pushed outward.

[0045] When the push rings 6 on both sides move outward, the limit ring pieces 61 on the push rings 6 are no longer located outside the elastic tube 12. At this time, the elastic force of the elastic band 32 pulls the pull cloth 31, thereby driving the inflatable measurement sleeve 3 to tighten and sleeve on the elastic tube 12. Then the user only needs to move the adjustment component to the right to reset, so that the notch 250 in the middle of the movable part 25 moves into the fixed frame 272 again. At this time, the movable part 25 no longer pushes the fixed frame 272, and the clamps 27 on both sides can be automatically reset by the elastic force of the spring 262, so that the clamps 27 can clamp the pull cloth 31 again.

[0046] At this time, the user can inflate and deflate the inflatable measuring sleeve 3 through the air pump in the pressure gauge 22 to detect the elastic tube 12. The oscillation wave in the oil circuit is collected by the pressure sensor in the pressure gauge 22, and finally the pressure is calculated by the algorithm software built into the pressure gauge 22, so as to obtain the internal pressure of the oil circuit.

[0047] Furthermore, after the pressure test is completed, the user only needs to push the adjustment component to the right, and the clamps 27 on both sides are opened. And the two push plates 254 on the left can push the flexible liquid storage capsule 9 in the mother fixed sleeve 8, while the push plate 254 on the right leaves the sub-fixed sleeve 7. At this time, the liquid in the two flexible liquid storage capsules 9 in the mother fixed sleeve 8 can be moved to the mother liquid rings 5 ​​on both sides through the first mother connecting tube 81 and the second mother connecting tube 82 respectively. At this time, the liquid in the mother liquid ring 5 can enter the mother flexible liquid capsule 511 through the mother connecting column 51, so that the mother flexible liquid capsule 511 can gradually bulge outward. Thereby, the movement of the push ring 6 can be achieved by the push of the partition 62 by the mother flexible liquid capsule 511, so that the push rings 6 on both sides can be pushed inward.

[0048] Since the thickness of the limiting ring piece 61 on the push ring 6 is relatively thin, and the inner wall of the inflation measuring sleeve 3 is made of a relatively smooth material. Therefore, when the push ring 6 moves inward, the user only needs to slightly stretch the elastic band 32 downward to slightly loosen the inflation measuring sleeve 3. In this way, the limiting ring piece 61 can be driven to move into the inflation measuring sleeve 3 during the process of the push ring 6 moving inward. At this time, the limiting ring pieces 61 on both sides are located outside the elastic tube 12, so that the elastic tube 12 can be prevented from expanding outward due to the pressure inside the tube when the oil circuit is in use.

[0049] When the limiting ring piece 61 is reset, the user only needs to reset the adjustment assembly to the middle again so that the clamping plates 27 on both sides clamp the pull cloth 31 again.

[0050] Furthermore, since the sub-flexible liquid capsule 412, the mother flexible liquid capsule 511 and the flexible liquid storage capsule 9 are all made of flexible materials, when the sub-flexible liquid capsule 412 is filled with liquid and bulges, the liquid in the mother flexible liquid capsule 511 can automatically move to the corresponding flexible liquid storage capsule 9 through the mother liquid ring 5. Similarly, when the mother flexible liquid capsule 511 is filled with liquid and bulges, the liquid in the sub-flexible liquid capsule 412 can also automatically move to the corresponding flexible liquid storage capsule 9 through the sub-liquid ring 4.

[0051] Since the corresponding flexible liquid storage capsule 9, the liquid ring and the flexible liquid capsule are all connected, and the flexible liquid storage capsule 9 and the flexible liquid capsule are all completely sealed, there will be no leakage.

[0052] Furthermore, when the adjustment component is reset from the side to the middle, since the push rings 6 on both sides have moved to the predetermined position, the push rings 6 will not move, but only control the clamping of the clamping plates 27 on both sides. Only when the adjustment component moves to the other side again, the push ring 6 will move due to the push of the sub-flexible liquid sac 412 or the mother flexible liquid sac 511.

[0053] In the present invention, an elastic tube 12 is provided in the oil pipe 1 of the oil circuit. The setting of the limit ring 61 can ensure that the elastic tube 12 is normally used in the oil circuit. The pressure gauge 22 controls the inflation measuring sleeve 3 to detect the elastic tube 12, so as to detect the pressure in the oil circuit. This detection method does not require a window to be opened in the oil circuit, thereby ensuring the sealing of the oil circuit. Moreover, by adjusting the setting of the component, the push ring 6 can be moved to facilitate the replacement of the working state and the detection state of the elastic tube 12.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oil pressure measuring mechanism based on the pressure measuring principle of a sphygmomanometer, comprising an oil pipe (1), an elastic pipe (12) and a pressure measuring instrument (22), characterized in that: Both ends of the elastic tube (12) are in communication with the oil pipe (1), and fixing rings (2) are fixedly sleeved on both sides of the elastic tube (12) on the oil pipe (1); The tops of the fixing rings (2) on both sides are connected to the first fixing seat (21), a pressure gauge (22) is installed on the first fixing seat (21), and an air pump and a pressure sensor are arranged inside the pressure gauge (22); Push rings (6) are movably provided on both sides of the elastic tube (12) on the oil tube (1), and limiting ring pieces (61) are fixedly provided on the push rings (6), and the limiting ring pieces (61) are movably located outside the elastic tube (12); The side surfaces of the fixing rings (2) on both sides are connected to the second fixing seat (23); a through cavity (231) is provided in the middle of the second fixing seat (23); an inflation measuring sleeve (3) is sleeved on the outer side of the elastic tube (12); a pull cloth (31) is connected to one end of the inflation measuring sleeve (3); the pull cloth (31) passes through the through cavity (231); and an air pump is connected to the inflation measuring sleeve (3) via a rubber air tube (221); A top plate (241) is fixedly disposed above the second fixing seat (23), an elastic band (32) is fixedly connected to the pull cloth (31), and the other end of the elastic band (32) is connected to the top plate (241); A sub-liquid ring (4) and a mother-liquid ring (5) are fixedly sleeved on the oil pipe (1) between the fixed ring (2) and the push ring (6), and the sub-liquid ring (4) and the mother-liquid ring (5) push the push ring (6) back and forth through the sub-flexible liquid sac (412) and the mother-flexible liquid sac (511), respectively.

2. The oil pressure measuring mechanism based on the sphygmomanometer pressure measurement principle according to claim 1, characterized in that: A protective cover (11) is installed on the oil pipe (1) outside the elastic pipe (12); the oil pipe (1) and the elastic pipe (12) are connected and have the same wall thickness; a plurality of guide members (13) are fixedly provided on both sides of the elastic pipe (12) on the oil pipe (1); and guide cavities (63) are adapted to correspond to the guide members (13) on the inner walls of the convex ring (6) and the limiting ring piece (61).

3. The oil pressure measuring mechanism based on the sphygmomanometer pressure measurement principle according to claim 1, characterized in that: The inflatable measuring sleeve (3) is sleeved on the outside of the elastic tube (12), a fixing rod (33) is fixedly connected between the fixing rings (2) on both sides, one end of the inflatable measuring sleeve (3) is fixedly connected to the fixing rod (33), and a connecting frame (331) is fixedly provided on the fixing rod (33).

4. The oil pressure measuring mechanism based on the sphygmomanometer pressure measurement principle according to claim 3, characterized in that: The other end of the inflation measuring sleeve (3) is fixedly connected with a pull cloth (31), which passes through the connecting frame (331) and the through cavity (231) in sequence and is connected to the elastic band (32), and both sides of the pull cloth (31) are provided with fleece-surface Velcro (311).

5. The oil pressure measuring mechanism based on the sphygmomanometer pressure measurement principle according to claim 1, characterized in that: Fixed columns (24) are vertically arranged upwardly on both sides of the top of the second fixed seat (23); the tops of the fixed columns (24) on both sides are connected to the top plate (241); guide frames (242) are fixedly arranged on the side walls on both sides of the fixed columns (24); and two clamping plates (27) are movably arranged between the fixed columns (24) on both sides.

6. The oil pressure measuring mechanism based on the sphygmomanometer pressure measurement principle according to claim 5, characterized in that: A fixing block (26) is fixedly arranged between the clamping plates (27) on both sides of the side wall of the fixing column (24), a plurality of guide columns (263) are fixedly arranged vertically on both sides of the fixing block (26), and the clamping plates (27) are guided and moved by the guide columns (263); A through hole (261) is formed through the middle of the fixing block (26), a spring (262) is installed in the through hole (261), both ends of the spring (262) are connected to the clamping plate (27), a hook-surface Velcro (271) is provided on the inner wall of the clamping plate (27) corresponding to the fleece-surface Velcro (311) on the pull cloth (31), and a fixing frame (272) is fixedly provided on the outer side of the clamping plates (27) on both sides.

7. The oil pressure measuring mechanism based on the sphygmomanometer pressure measuring principle according to claim 6, characterized in that: An adjustment assembly is provided above the second fixed seat (23), the adjustment assembly comprising two movable members (25), the two movable members (25) respectively passing through the guide frame (242) and the fixed frame (272) on both sides, and the middle part of the movable members (25) is provided with a notch (250) through a slope transition; The ends of the movable members (25) on both sides are fixedly connected to the end plates (251), the tops of the end plates (251) on both sides are vertically and fixedly provided with connecting plates (252), the tops of the connecting plates (252) are vertically provided with two push columns (253), and the ends of the push columns (253) are fixedly provided with push plates (254).

8. The oil pressure measuring mechanism based on the sphygmomanometer pressure measuring principle according to claim 7, characterized in that: Two sub-fixing sleeves (7) and a female fixing sleeve (8) are respectively arranged on both sides of the top of the top plate (241); entrances are provided on the outer sides of the sub-fixing sleeve (7) and the female fixing sleeve (8); and the push plates (254) enter the sub-fixing sleeve (7) and the female fixing sleeve (8) through the entrances; A flexible liquid storage capsule (9) is installed inside the sub-fixing sleeve (7) and the female fixing sleeve (8); the ends of the flexible liquid storage capsules (9) in the two sub-fixing sleeves (7) are respectively connected with a first sub-connecting tube (71) and a second sub-connecting tube (72); the ends of the flexible liquid storage capsules (9) in the two female fixing sleeves (8) are respectively connected with a first female connecting tube (81) and a second female connecting tube (82); and the connecting tubes in the flexible liquid storage capsules (9) extend out from the ends of the fixing sleeves.

9. The oil pressure measuring mechanism based on the sphygmomanometer pressure measuring principle according to claim 8, characterized in that: The first sub-connecting tube (71) and the second sub-connecting tube (72) are respectively connected to the sub-liquid rings (4) on both sides, the first mother connecting tube (81) and the second mother connecting tube (82) are respectively connected to the mother-liquid rings (5) on both sides, and a plurality of sub-connecting columns (41) and mother-connecting columns (51) are respectively fixedly arranged on the outer sides of the sub-liquid rings (4) and the mother-liquid rings (5).

10. The oil pressure measuring mechanism based on the sphygmomanometer pressure measuring principle according to claim 9, characterized in that: A plurality of partitions (62) are fixedly arranged on the outer side of the push ring (6), and a female flexible liquid capsule (511) is connected and arranged on each of the female connecting columns (51), and the other end of each of the female flexible liquid capsules (511) is fixedly connected to the partition (62); The sub-connecting columns (41) are all fixedly connected with sub-fixed tubes (411), the other ends of the sub-fixed tubes (411) are connected with sub-flexible liquid capsules (412), and the other ends of the sub-flexible liquid capsules (412) are connected to the other side of the partition plate (62).

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