A pressure instrument with an anti-collision structure

Abstract

The present invention relates to the technical field of pressure instruments, in particular to a pressure instrument with an anti-collision structure, which includes a fixed ring. At the center of the bottom of the fixed ring, there is a fixedly connected joint. Above the fixed ring, there is a pressure instrument main body. At the bottom of the pressure instrument main body, there is a liquid inlet pipe fixedly connected. Between the liquid inlet pipe and the joint, there is a movable hose fixedly connected. A spherical base is fixedly connected to the liquid inlet pipe, and a spherical collar is sleeved on the spherical base; through the relative movement between the spherical base and the spherical collar, when the operation platform is impacted and vibrates, the pressure instrument main body makes elastic yielding and buffering, reducing the oscillating damage of the internal parts of the pressure instrument main body, and making the pressure instrument main body always remain vertical during elastic yielding, thereby reducing the influence of the inclination of the pressure instrument main body on the pointer indication, and thus reducing the measurement error of the pressure instrument.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure instruments, and particularly relates to a pressure instrument with an anti-collision structure. Background Art

[0002] ‌A pressure instrument is an instrument used to measure pressures greater than atmospheric pressure, mainly for the pressure measurement of liquids, gases, and vapors. The elastic sensitive element in a mechanical pressure gauge undergoes elastic deformation as the pressure changes. Mechanical pressure gauges use sensitive elements such as bourdon tubes, diaphragms, bellows, and corrugated pipes and are classified accordingly. The measured pressure is generally regarded as relative pressure. Generally, the reference point is selected as atmospheric pressure.

[0003] The patent document with the publication number CN221764741U discloses a pressure instrument with an anti-collision function, including a protective cover. A baffle is fixedly connected inside the protective cover. A rotating block is rotatably connected to one side of the baffle. A fixed shaft is fixedly connected inside the rotating block. A pulling column is fixedly connected inside the fixed shaft. The pulling column is rotatably connected inside the rotating block. A spring is arranged on the outer wall of the pulling column. One end of the spring is fixedly connected to one side of the baffle, and the other end of the spring is fixedly connected to a fixed column.

[0004] When an offshore drilling platform is operating, it is usually necessary to install a pressure instrument to accurately measure the downhole pressure. Affected by natural factors such as sea waves and wind, the platform itself will vibrate and displace. And during the drilling process, the interaction between the drill bit, drill pipe, and formation rock will generate complex vibrations, including longitudinal vibrations and lateral vibrations. These vibrations will be transmitted to the pressure instrument through the drill pipe. When the offshore drilling platform is impacted, the pressure instrument will also generate corresponding vibrations. When the prior art uses a protective cover to protect the pressure instrument, it only provides a certain degree of protection against direct external force impacts on the pressure instrument, but cannot effectively buffer the vibrations generated by the pressure instrument when the platform is impacted, thereby reducing the stability of the pressure instrument during operation and increasing the measurement error of the pressure instrument. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose a pressure instrument with an anti-collision structure.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a pressure instrument with an anti-collision structure, including a fixing ring. A joint is fixedly communicated with the bottom center of the fixing ring. A pressure instrument main body is arranged above the fixing ring. A liquid inlet pipe is fixedly communicated with the bottom of the pressure instrument main body. An activity hose is fixedly communicated between the liquid inlet pipe and the joint.

[0007] A spherical base is fixedly connected to the liquid inlet pipe. A spherical collar is sleeved on the spherical base. The spherical base and the spherical collar have the same contour. A plurality of arc-shaped grooves are circumferentially formed on the arc surface of the spherical base. Two movable balls are arranged inside each of the arc-shaped grooves. The movable balls are all in contact with the inner wall of the spherical collar;

[0008] A plurality of first connecting rods are rotatably arranged on the outer side of the spherical collar in the circumferential direction. A plurality of second connecting rods are rotatably connected to the top of the fixed ring in the circumferential direction. The top end of the first connecting rod is fixedly connected with a circular rod. One end of the circular rod is fixedly connected with a limiting ball. A plurality of limiting grooves are circumferentially formed on the surface of the spherical collar. The limiting ball is rollingly connected inside the corresponding limiting groove. An elastic connection mechanism is connected between the first connecting rod and the corresponding second connecting rod. A limiting ring is slidably sleeved on the liquid inlet pipe. Two retaining rings are fixedly connected to the liquid inlet pipe. The limiting ring is located between the two retaining rings. A horizontal displacement mechanism is connected to the limiting ring.

[0009] Preferably, the elastic connection mechanism includes a sliding rod and a limiting sleeve. The sliding rod and the limiting sleeve are respectively fixedly connected to adjacent ends of the first connecting rod and the second connecting rod. One end of the sliding rod penetrates through the limiting sleeve and extends into the interior of the limiting sleeve and is then fixedly connected with a piston. A return buffer mechanism is connected inside the limiting sleeve. A first connecting ring is fixedly connected to the surface of the sliding rod. A second connecting ring is arranged on the surface of the limiting sleeve. A first spring is arranged between the first connecting ring and the second connecting ring. A position adjustment mechanism is connected to the second connecting ring.

[0010] Preferably, the return buffer mechanism includes a plurality of compression tubes and a plurality of return tubes. The plurality of compression tubes and return tubes are fixedly inserted on the piston. The number of compression tubes is more than the number of return tubes. A first one-way valve is fixedly installed at one end of the compression tube close to the limiting sleeve. A second one-way valve is fixedly installed at one end of the return tube close to the sliding rod. The interior of the limiting sleeve is filled with hydraulic oil.

[0011] Preferably, the position adjustment mechanism includes an inclined plane ring. The inclined plane ring is sleeved on the surface of the limiting sleeve. The inclined plane ring is fixedly connected to the second connecting ring. An inclined plane abutting block is fixedly connected to the surface of the limiting sleeve. The inclined plane abutting block is in contact and fit with the inclined surface of the inclined plane ring. A plugging block is fixedly connected to the inclined plane abutting block. A plurality of limiting grooves are formed on the inclined surface of the inclined plane abutting block. The plugging block is located inside the corresponding limiting groove.

[0012] Preferably, the horizontal displacement mechanism includes a movable ring located on top of the fixed ring. The connection between the joint and the movable hose is inside the movable ring. A plurality of fixed rods are fixedly connected to the top of the movable ring, and one end of each fixed rod is fixedly connected to the limit ring. A plurality of L-shaped bars are fixedly connected to the fixed ring along the circumference. One end of the L-shaped bar extends above the movable ring and is fixedly connected to a circular pin. A circular wall is fixedly connected to the top of the movable ring.

[0013] Preferably, a spherical groove is provided at the bottom end of the circular pin, and contact balls are rollably connected inside the spherical groove. The contact balls are all in contact with the top of the movable ring.

[0014] Preferably, a stop valve is fixedly installed on the joint, a valve lever is rotatably connected to the stop valve, and a threaded groove is provided at the bottom end of the joint.

[0015] Preferably, an annular frame is fixedly connected to the fixed ring. The pressure gauge main body is inside the annular frame. A rotating ring is provided at the bottom of the fixed ring. A push rod is fixedly connected to the bottom of the rotating ring. The push rod is located on one side of the valve lever. An elastic impact mechanism is connected to the rotating ring, and a rotation limiting mechanism is connected between the rotating ring and the annular frame.

[0016] Preferably, the elastic impact mechanism includes a plurality of fixed blocks. The plurality of fixed blocks are circumferentially arranged inside the rotating ring and fixedly connected to the bottom of the fixed ring. An arc-shaped pin is fixedly connected to each fixed block. The arc-shaped pins are coaxial with the rotating ring. A sliding block is slidably inserted on each arc-shaped pin. The sliding blocks are all fixedly connected to the inner side of the rotating ring. A second spring is sleeved on the arc-shaped pin. The second spring is fixedly connected between the corresponding sliding block and the fixed block.

[0017] Preferably, the rotation limiting mechanism includes a metal cable and a through hole. The metal cable is fixedly connected to the annular frame. The through hole is provided in the fixed ring. One end of the metal cable extends below the fixed ring along the through hole and is fixedly connected to the rotating ring. The metal cable is made of gray cast iron, and an annular notch is provided on the surface of the metal cable near one end of the rotating ring.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Through the relative movement between the spherical base and the spherical collar, the pressure gauge body can make elastic yielding and buffering when the operating platform is impacted and vibrates, improving the stability of the pressure gauge body during vibration, reducing the oscillating damage of the internal parts of the pressure gauge body, and keeping the pressure gauge body vertical during elastic yielding, thereby reducing the influence of the inclination of the pressure gauge body on the pointer indication and reducing the measurement error of the pressure gauge.

[0020] 2. Since the number of return pipes is less than the number of compression pipes, there are fewer oil passages when the piston moves reversely inside the limit sleeve, resulting in a greater piston damping when the first spring rebounds, restricting the rebound speed of the sliding rod, improving the stability when the limit sleeve rebounds and returns to the initial position, and reducing the elastic impact on the pressure gauge body caused by the rebound.

[0021] 3. By the fitting of the inclined surfaces of the inclined surface ring and the inclined surface abutting block, after the inclined surface ring rotates, the inclined surface abutting block can be limited and supported at different positions of the inclined surface ring, so that the distance between the second connecting ring and the first connecting ring can be adjusted by rotating the inclined surface ring, and the compression degree of the first spring can be adjusted.

[0022] 4. When the pressure gauge body is accidentally collided during the movement of large equipment such as forklifts, the annular frame is first damaged. When the annular frame is damaged, the rotation limit of the rotating ring by the rotation limit mechanism is released, and the rotating ring makes an elastic rotation under the action of the elastic impact mechanism, and the push rod makes a contact impact on the valve lever, and the valve lever rotates to close the stop valve switch, preventing the measured medium from directly spraying out from the damaged part after the pressure gauge body is damaged by direct external force impact, effectively reducing the accident loss and reducing the harm to the staff caused by the exposure of harmful media. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the first structural schematic diagram of the present invention;

[0024] Figure 2 is of the present invention Figure 1 the enlarged schematic diagram of the structure at A in;

[0025] Figure 3 is of the present invention Figure 1 the enlarged schematic diagram of the structure at B in;

[0026] Figure 4 is the second structural schematic diagram of the present invention;

[0027] Figure 5 is of the present invention Figure 4 the enlarged schematic diagram of the structure at C in;

[0028] Figure 6It is the third structural schematic diagram of the present invention;

[0029] Figure 7 of the present invention Figure 6 The enlarged schematic diagram of the structure at D in;

[0030] Figure 8 It is the sectional schematic diagram of the matching structure of the spherical base and the spherical collar of the present invention;

[0031] Figure 9 It is the schematic diagram of the matching structure of the first connecting rod and the second connecting rod of the present invention (the limiting sleeve is sectioned);

[0032] Figure 10 of the present invention Figure 9 The enlarged schematic diagram of the structure at E in;

[0033] Figure 11 It is the schematic diagram of the matching structure of the L-shaped strip, the round pin and the contact ball of the present invention.

[0034] In the figure: 1. Fixed ring; 2. Connector; 3. Pressure gauge main body; 4. Liquid inlet pipe; 5. Movable hose; 6. Spherical base; 7. Spherical collar; 8. Arc groove; 9. Movable ball; 10. First connecting rod; 11. Second connecting rod; 12. Limiting ring; 13. Retaining ring; 14. Sliding rod; 15. Limiting sleeve; 16. Piston; 17. First connecting ring; 18. Second connecting ring; 19. First spring; 20. Compression pipe; 21. Rebound pipe; 22. First one-way valve; 23. Second one-way valve; 24. Inclined surface ring; 25. Inclined surface abutting block; 26. Insertion block; 27. Limiting groove; 28. Movable ring; 29. Fixed rod; 30. L-shaped strip; 31. Round pin; 32. Annular wall; 33. Spherical groove; 34. Contact ball; 35. Cut-off valve; 36. Valve lever; 37. Annular frame; 38. Rotating ring; 39. Push rod; 40. Fixed block; 41. Arc pin; 42. Sliding block; 43. Second spring; 44. Metal cable; 45. Through hole; 46. Annular notch; 47. Round rod; 48. Limiting ball; 49. Limiting groove. Specific embodiments

[0035] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0036] As Figures 1 to 11 shown, a pressure gauge with an anti-collision structure includes a fixed ring 1, and a connector 2 is fixedly communicated with the bottom center of the fixed ring 1 (as Figure 5 shown), a pressure gauge main body 3 is arranged above the fixed ring 1, and a liquid inlet pipe 4 is fixedly communicated with the bottom of the pressure gauge main body 3 (in combination withFigure 1 and Figure 7 ), there is a movable hose 5 fixedly connected between the liquid inlet pipe 4 and the connector 2;

[0037] A spherical base 6 is fixedly connected to the liquid inlet pipe 4, a spherical collar 7 is sleeved on the spherical base 6, the spherical base 6 and the spherical collar 7 have the same contour, a plurality of arc-shaped grooves 8 are circumferentially formed on the arc surface of the spherical base 6, two movable balls 9 are arranged inside each arc-shaped groove 8, and the movable balls 9 are all in contact with the inner wall of the spherical collar 7;

[0038] A plurality of first connecting rods 10 are circumferentially arranged on the outer side of the spherical collar 7. A plurality of second connecting rods 11 are rotatably connected to the top of the fixed ring 1 in the circumferential direction. The top end of the first connecting rod 10 is fixedly connected to a circular rod 47. One end of the circular rod 47 is fixedly connected to a limiting ball 48. A plurality of limiting grooves 49 are circumferentially formed on the surface of the spherical collar 7. The limiting ball 48 is in rolling connection inside the corresponding limiting groove 49. An elastic connection mechanism is connected between the first connecting rod 10 and the corresponding second connecting rod 11. A limiting ring 12 is slidably sleeved on the liquid inlet pipe 4. Two retaining rings 13 are fixedly connected to the liquid inlet pipe 4. The limiting ring 12 is located between the two retaining rings 13. A horizontal displacement mechanism is connected to the limiting ring 12; during operation, when an offshore drilling platform is operating, it is usually necessary to install a pressure gauge to accurately measure the downhole pressure. Affected by natural factors such as sea waves and wind, the platform itself will vibrate and displace. And during the drilling process, the interaction between the drill bit, drill pipe and formation rock will generate complex vibrations, including longitudinal vibrations and transverse vibrations. These vibrations will be transmitted to the pressure gauge through the drill pipe. When the offshore drilling platform is impacted, the pressure gauge will also generate corresponding vibrations. When the prior art protects the pressure gauge through a protective cover, it only provides a certain protection against the direct external force impact on the pressure gauge, but cannot effectively buffer the vibrations generated by the pressure gauge when the platform is impacted, thereby reducing the stability of the pressure gauge during operation and increasing the measurement error of the pressure gauge;This technical solution can solve the above problems, and the specific working method is as follows: The joint 2 is fixedly installed on the medium pipeline to be detected, so that the medium to be measured enters the inside of the joint 2 through hydraulic pressure, and enters the movable hose 5 along the connection between the joint 2 and the movable hose 5, and then moves into the liquid inlet pipe 4 along the movable hose 5, and finally enters the pressure chamber of the pressure gauge main body 3 through the connection between the liquid inlet pipe 4 and the pressure gauge main body 3, and the pressure value is displayed according to the rotation of the pointer on the surface of the pressure gauge main body 3. When the offshore drilling platform vibrates under the action of sea waves, wind force and drilling, the connection between the joint 2 and the medium pipeline will vibrate synchronously when the operation platform is impacted, so that the fixed ring 1 moves in the reverse direction along the direction of the impact. When the fixed ring 1 moves, the spherical collar 7 moves synchronously with the fixed ring 1, and the elastic connection mechanism near the moving direction is elastically compressed, so that the corresponding first connecting rod 10 and the second connecting rod 11 approach each other, and through the rolling connection of the limiting ball 48 in the limiting groove 49, when the spherical collar 7 is tilted, the limiting ball 48 on the circular rod 47 rotates in cooperation in the limiting groove 49, so that the spherical collar 7 tilts in the moving direction and performs elastic buffering during the tilting process. The spherical collar 7 drives the spherical base 6 to move synchronously during the movement. Through the fixed connection between the spherical base 6 and the liquid inlet pipe 4, the liquid inlet pipe 4 moves synchronously. Through the sliding insertion of the limiting ring 12 and the liquid inlet pipe 4, the limiting ring 12 slides along the sliding insertion part of the liquid inlet pipe 4. During the sliding process of the limiting ring 12, the upper and lower ends of the limiting ring 12 are blocked by the retaining ring 13 to prevent the limiting ring 12 from detaching from the liquid inlet pipe 4, and under the action of the horizontal displacement mechanism, the limiting ring 12 moves horizontally in cooperation along the moving direction of the spherical collar 7, so that when the spherical base 6 moves and tilts synchronously with the spherical collar 7, the spherical base 6 rotates relatively inside the spherical collar 7, and the movable ball 9 rolls in cooperation between the spherical collar 7 and the corresponding arc groove 8, reducing the contact friction generated when the spherical collar 7 and the spherical base 6 move relatively. The two movable balls 9 inside the arc groove 8 vertically limit between the spherical collar 7 and the spherical base 6 to prevent the spherical base 6 from falling downward along the inside of the spherical collar 7. Through the movement of the spherical collar 7 along the impact direction and the tilting buffer under the action of the elastic connection mechanism, and through the relative movement between the spherical base 6 and the spherical collar 7, the pressure gauge main body 3 performs elastic yielding buffer when the operation platform is impacted and vibrates, improving the stability of the pressure gauge main body 3 during vibration, reducing the oscillation damage of the internal parts of the pressure gauge main body 3, and making the pressure gauge main body 3 always remain vertical during elastic yielding, thereby reducing the influence of the tilt of the pressure gauge main body 3 on the pointer indication, and thus reducing the measurement error of the pressure gauge.;

[0039] As a further embodiment of the present invention, the elastic connection mechanism includes a sliding rod 14 and a limiting sleeve 15. The sliding rod 14 and the limiting sleeve 15 are respectively fixedly connected to adjacent ends of the first connecting rod 10 and the second connecting rod 11. One end of the sliding rod 14 penetrates through the limiting sleeve 15 and extends into the interior of the limiting sleeve 15 and is fixedly connected with a piston 16. A rebound buffer mechanism is connected inside the limiting sleeve 15. A first connecting ring 17 is fixedly connected to the surface of the sliding rod 14. A second connecting ring 18 is arranged on the surface of the limiting sleeve 15. A first spring 19 is arranged between the first connecting ring 17 and the second connecting ring 18. A position adjusting mechanism is connected to the second connecting ring 18. During operation, when the spherical sleeve ring 7 tilts to one side, the first connecting rod 10 in the corresponding direction on the spherical sleeve ring 7 moves synchronously, so that the sliding rod 14 on the first connecting rod 10 moves along the penetrating insertion part of the limiting sleeve 15 and drives the piston 16 to move synchronously. Both the first connecting rod 10 and the second connecting rod 11 rotate in cooperation along the rotation connection part. During the movement of the sliding rod 14, the first connecting ring 17 approaches the corresponding second connecting ring 18 and compresses the corresponding first spring 19 to generate a compressive deformation, thereby elastically buffering the tilting movement of the spherical sleeve ring 7 and reducing the rigid impact on the pressure gauge main body 3 caused by the collision.

[0040] As a further embodiment of the present invention, the rebound buffer mechanism includes a plurality of compression tubes 20 and a plurality of rebound tubes 21. The plurality of compression tubes 20 and the rebound tubes 21 are fixedly inserted on the piston 16. The number of compression tubes 20 is more than the number of rebound tubes 21. A first one-way valve 22 is fixedly installed at one end of the compression tube 20 close to the limiting sleeve 15. A second one-way valve 23 is fixedly installed at one end of the rebound tube 21 close to the sliding rod 14. The interior of the limiting sleeve 15 is filled with hydraulic fluid. During operation, when the first connecting rod 10 moves towards the second connecting rod 11, one end of the sliding rod 14 drives the piston 16 to move inside the limiting sleeve 15, and makes the first connecting ring 17 and the second connecting ring 18 approach each other, thereby compressing the first spring 19. During the compression of the first spring 19, the piston 16 moves out of the interior of the limiting sleeve 15 and enters the liquid unidirectionally through the first one-way valve 22 on the compression tube 20, so that the piston 16 can smoothly pass through the hydraulic fluid. When the first spring 19 rebounds, the sliding rod 14 drives the piston 16 to move in the reverse direction, so that the second one-way valve 23 on the rebound tube 21 conducts unidirectional liquid inlet. Since the number of rebound tubes 21 is less than the number of compression tubes 20, the hydraulic fluid passage for the piston 16 to move in the reverse direction inside the limiting sleeve 15 is less, so that the damping of the piston 16 when the first spring 19 rebounds is greater, and the rebound speed of the sliding rod 14 is restricted, the stability of the limiting sleeve 15 when it rebounds and returns to the initial position is improved, and the elastic impact on the pressure gauge main body 3 caused by the rebound is reduced.

[0041] As a further implementation scheme of the present invention, the position adjustment mechanism includes a bevel ring 24, which is sleeved on the surface of the limiting sleeve 15, and the bevel ring 24 is fixedly connected to the second connecting ring 18. The surface of the limiting sleeve 15 is fixedly connected with a bevel block 25, and the bevel block 25 is in contact with the inclined surface of the bevel ring 24. A plug-in block 26 is fixedly connected to the bevel block 25, and a plurality of limiting grooves 27 are provided on the inclined surface of the bevel block 25, and the plug-in block 26 is located inside the corresponding limiting grooves 27; when working, the corresponding limiting grooves 27 on the bevel ring 24 are positioned by the plug-in block 26 on the bevel block 25, and the second connecting ring 18 is supported while limiting the rotation of the bevel ring 24, and the second connecting ring 18 is moved along the sleeve of the limiting sleeve 15 so that the second connecting ring 18 can be moved. The second connecting ring 18 drives the bevel ring 24 to move, so that the plug-in block 26 on the bevel block 25 is disengaged from the corresponding limiting groove 27, and the rotation restriction on the bevel ring 24 is released. Then, the second connecting ring 18 is released after the bevel ring 24 is rotated. Under the elastic extension action of the first spring 19, the bevel ring 24 and the bevel block 25 are re-contacted, and the plug-in block 26 is re-inserted into the corresponding limiting groove 27. Through the inclined surfaces of the bevel ring 24 and the bevel block 25 fit together, the bevel block 25 can be limited at different positions of the bevel ring 24 and support it after the bevel ring 24 is rotated, so that the distance between the second connecting ring 18 and the first connecting ring 17 can be adjusted by rotating the bevel ring 24, and the compression degree of the first spring 19 can be adjusted.

[0042] As a further embodiment of the present invention, the horizontal displacement mechanism includes a movable ring 28, the movable ring 28 is located at the top of the fixed ring 1, the connection between the joint 2 and the movable hose 5 is located inside the movable ring 28, and the top of the movable ring 28 is fixedly connected to a plurality of fixed rods 29 (such as Figure 3 As shown, one end of the fixing rod 29 is fixedly connected to the limiting ring 12 (as shown in Figure 7 As shown in the figure, a plurality of L-shaped strips 30 are fixedly connected to the fixed ring 1 along the circumferential direction, one end of the L-shaped strip 30 extends to the top of the movable ring 28 and is fixedly connected to a circular pin 31, and the top of the movable ring 28 is fixedly connected to an annular wall 32; when working, the limiting ring 12 and the movable ring 28 are connected by the fixed rod 29, and the top of the movable ring 28 is limited by the circular pin 31 at one end of the L-shaped strip 30, thereby limiting the vertical movement of the movable ring 28, and the blocking effect of the annular wall 32 prevents the circular pin 31 from detaching from the top of the movable ring 28, so that the movable ring 28 can move horizontally within a certain range at the top of the fixed ring 1.

[0043] As a further embodiment of the present invention, a spherical groove 33 is provided at the bottom end of the circular pin 31, and a contact ball 34 is rotatably connected inside the spherical groove 33. The contact balls 34 are all in contact with the top of the movable ring 28. During operation, by the contact between the contact balls 34 and the top of the movable ring 28, when the movable ring 28 moves horizontally, the contact balls 34 roll inside the corresponding spherical grooves 33 through contact friction, thereby reducing the frictional resistance when the movable ring 28 moves.

[0044] As a further embodiment of the present invention, a stop valve 35 is fixedly installed on the joint 2. A valve lever 36 is rotatably connected to the stop valve 35, and a threaded groove is provided at the bottom end of the joint 2. During operation, the stop valve 35 is installed on the joint 2, and the stop valve 35 is controlled to be opened and closed by the rotation of the valve lever 36. Through the threaded connection of the threaded groove, the joint 2 can be threadedly fixed to the medium pipeline to be detected.

[0045] As a further embodiment of the present invention, an annular frame 37 is fixedly connected to the fixed ring 1. The pressure gauge main body 3 is located inside the annular frame 37. A rotating ring 38 is provided at the bottom of the fixed ring 1. A push rod 39 is fixedly connected to the bottom of the rotating ring 38. The push rod 39 is located on one side of the valve lever 36. An elastic impact mechanism is connected to the rotating ring 38, and a rotation limiting mechanism is connected between the rotating ring 38 and the annular frame 37. During operation, the rotating ring 38 is limited by the rotation limiting mechanism. When the pressure gauge main body 3 is in daily operation, the periphery of the pressure gauge main body 3 is protected by the annular frame 37. When the pressure gauge main body 3 is accidentally collided by the movement of large equipment such as a forklift, the annular frame 37 is first damaged. When the annular frame 37 is damaged, the rotation limit of the rotating ring 38 by the rotation limiting mechanism is released, and the rotating ring 38 is elastically rotated by the action of the elastic impact mechanism, and the push rod 39 impacts the valve lever 36 in contact, and the valve lever 36 is rotated to close the stop valve 35 switch, preventing the measured medium from directly spraying out from the damaged part after the pressure gauge main body 3 is damaged by direct external force impact, effectively reducing the accident loss and reducing the harm to the staff caused by the exposure of harmful media.

[0046] As a further embodiment of the present invention, the elastic impact mechanism includes a plurality of fixing blocks 40. The plurality of fixing blocks 40 are circumferentially arranged inside the rotating ring 38 and fixedly connected to the bottom of the fixing ring 1. An arc-shaped pin 41 is fixedly connected to each fixing block 40. The arc-shaped pin 41 and the rotating ring 38 are coaxially arranged. A sliding block 42 is slidably inserted on the arc-shaped pin 41. The sliding blocks 42 are fixedly connected to the inner side of the rotating ring 38. A second spring 43 is sleeved on the arc-shaped pin 41. The second spring 43 is fixedly connected between the corresponding sliding block 42 and the fixing block 40. During operation, the second spring 43 between the sliding block 42 and the fixing block 40 is in a compressed state. When the rotation limiting mechanism loses the rotation limitation on the rotating ring 38, the plurality of second springs 43 rebound through elastic stretching, thereby squeezing the corresponding sliding block 42 to move along the sliding insertion part of the arc-shaped pin 41, and driving the rotating ring 38 to rotate synchronously. The push rod 39 on the rotating ring 38 contacts the valve lever 36 under the action of elastic potential energy, and squeezes the valve lever 36 to rotate so as to close the on-off valve 35 switch.

[0047] As a further embodiment of the present invention, the rotation limiting mechanism includes a metal pull rope 44 and a through hole 45. The metal pull rope 44 is fixedly connected to the annular frame 37. The through hole 45 is opened on the fixing ring 1. One end of the metal pull rope 44 extends along the through hole 45 to the lower part of the fixing ring 1 and is fixedly connected to the rotating ring 38. The metal pull rope 44 is made of gray cast iron. An annular notch 46 is opened on the surface of the end of the metal pull rope 44 close to the rotating ring 38. During operation, the rotating ring 38 is pulled and kept in a taut state by the metal pull rope 44, thereby limiting the rotation of the rotating ring 38. When the annular frame 37 is impacted by an external force and moves and is damaged, the tensile force generated by the impact on the metal pull rope 44 breaks at the annular notch 46, thereby losing the limit on the rotating ring 38. The lower tensile strength and extensibility of gray cast iron make the metal pull rope 44 easily broken when being fractured, increasing the probability of tensile fracture of the metal pull rope 44 when impacted by an external force.

[0048] The working principle of the present invention:

[0049] Fix the joint 2 on the medium pipeline to be detected, so that the medium to be measured enters the inside of the joint 2 through hydraulic pressure, and enters the movable hose 5 along the connection between the joint 2 and the movable hose 5, then moves inside the liquid inlet pipe 4 along the movable hose 5, and finally enters the pressure chamber of the pressure gauge main body 3 through the connection between the liquid inlet pipe 4 and the pressure gauge main body 3, and displays the pressure value according to the rotation of the pointer on the surface of the pressure gauge main body 3. When the offshore drilling platform vibrates under the action of sea waves, wind force and drilling, the connection between the joint 2 and the medium pipeline will vibrate synchronously when the operating platform is impacted, so that the fixing ring 1 moves in the reverse direction along the direction of the impact. When the fixing ring 1 moves, the spherical collar 7 moves synchronously with the fixing ring 1, and the elastic connection mechanism near the moving direction is elastically compressed, so that the corresponding first connecting rod 10 and the second connecting rod 11 approach each other, and through the rolling connection of the limiting ball 48 in the limiting groove 49, when the spherical collar 7 tilts, the limiting ball 48 on the circular rod 47 rotates in cooperation in the limiting groove 49, so that the spherical collar 7 tilts in the moving direction and performs elastic buffering during the tilting process. During the movement of the spherical collar 7, the spherical base 6 is driven to move synchronously. Through the fixed connection between the spherical base 6 and the liquid inlet pipe 4, the liquid inlet pipe 4 moves synchronously. Through the sliding insertion of the limiting ring 12 and the liquid inlet pipe 4, the limiting ring 12 slides along the sliding insertion part of the liquid inlet pipe 4. During the sliding process of the limiting ring 12, the upper and lower ends of the limiting ring 12 are blocked by the retaining ring 13 to prevent the limiting ring 12 from detaching from the liquid inlet pipe 4, and through the action of the horizontal displacement mechanism, the limiting ring 12 moves horizontally in cooperation along the moving direction of the spherical collar 7, so that when the spherical base 6 moves and tilts synchronously with the spherical collar 7, the spherical base 6 rotates relatively inside the spherical collar 7, and the movable ball 9 rolls in cooperation between the spherical collar 7 and the corresponding arc groove 8, reducing the contact friction generated when the spherical collar 7 and the spherical base 6 move relatively. Through the two movable balls 9 inside the arc groove 8, vertical limitation is performed between the spherical collar 7 and the spherical base 6 to prevent the spherical base 6 from falling downward along the inside of the spherical collar 7. Through the movement of the spherical collar 7 along the impact direction and the tilting buffering under the action of the elastic connection mechanism, and through the relative movement between the spherical base 6 and the spherical collar 7, the pressure gauge main body 3 performs elastic yielding buffering when the operating platform is impacted and vibrates, improving the stability of the pressure gauge main body 3 during vibration, reducing the oscillation damage of the internal parts of the pressure gauge main body 3, and making the pressure gauge main body 3 always remain vertical during elastic yielding, thereby reducing the influence of the inclination of the pressure gauge main body 3 on the pointer indication, and thus reducing the measurement error of the pressure gauge.

[0050] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure instrument with an anti-collision structure, including a fixed ring, characterized in that, A connector is fixedly connected at the bottom center of the fixed ring. Above the fixed ring, there is a pressure gauge body. A liquid inlet pipe is fixedly connected to the bottom of the pressure gauge body. An active hose is fixedly connected between the liquid inlet pipe and the connector. A spherical base is fixedly connected to the liquid inlet pipe. A spherical collar is sleeved on the spherical base. The spherical base and the spherical collar have the same contour. A plurality of arc-shaped grooves are circumferentially formed on the arc surface of the spherical base. Two movable balls are arranged inside each arc-shaped groove, and the movable balls are all in contact with the inner wall of the spherical collar. A plurality of first connecting rods are circumferentially arranged on the outer side of the spherical collar. A plurality of second connecting rods are circumferentially rotatably connected to the top of the fixed ring. The top end of the first connecting rod is fixedly connected to a circular rod. One end of the circular rod is fixedly connected to a limiting ball. A plurality of limiting grooves are circumferentially formed on the surface of the spherical collar. The limiting ball is rollingly connected inside the corresponding limiting groove. An elastic connection mechanism is connected between the first connecting rod and the corresponding second connecting rod. A limiting ring is slidably sleeved on the liquid inlet pipe. Two retaining rings are fixedly connected to the liquid inlet pipe. The limiting ring is located between the two retaining rings. A horizontal displacement mechanism is connected to the limiting ring. The elastic connection mechanism includes a sliding rod and a limiting sleeve. The sliding rod and the limiting sleeve are respectively fixedly connected to adjacent ends of the first connecting rod and the second connecting rod. One end of the sliding rod penetrates through the limiting sleeve and extends into the interior of the limiting sleeve and is then fixedly connected to a piston. A return buffer mechanism is connected inside the limiting sleeve. A first connection ring is fixedly connected to the surface of the sliding rod. A second connection ring is arranged on the surface of the limiting sleeve. A first spring is arranged between the first connection ring and the second connection ring. A position adjustment mechanism is connected to the second connection ring. The return buffer mechanism includes a plurality of compression tubes and a plurality of return tubes. The plurality of compression tubes and return tubes are all fixedly inserted on the piston. The number of compression tubes is more than the number of return tubes. A first one-way valve is fixedly installed at one end of the compression tube close to the limiting sleeve. A second one-way valve is fixedly installed at one end of the return tube close to the sliding rod. The interior of the limiting sleeve is filled with hydraulic oil. The position adjustment mechanism includes an inclined surface ring. The inclined surface ring is sleeved on the surface of the limiting sleeve. The inclined surface ring is fixedly connected to the second connection ring. An inclined surface abutting block is fixedly connected to the surface of the limiting sleeve. The inclined surface of the inclined surface abutting block is in contact and fit with the inclined surface of the inclined surface ring. A plugging block is fixedly connected to the inclined surface abutting block. A plurality of limiting grooves are formed on the inclined surface of the inclined surface abutting block. The plugging block is located inside the corresponding limiting groove. The horizontal displacement mechanism includes a movable ring. The movable ring is located on the top of the fixed ring. The connection part between the connector and the active hose is located inside the movable ring. A plurality of fixed rods are fixedly connected to the top of the movable ring. One end of each fixed rod is fixedly connected to the limiting ring. A plurality of L-shaped strips are circumferentially fixedly connected to the fixed ring. One end of the L-shaped strip extends above the movable ring and is then fixedly connected to a circular pin. A circular wall is fixedly connected to the top of the movable ring.

2. The pressure gauge with an anti-collision structure according to claim 1, wherein A spherical groove is formed at the bottom end of the circular pin. A contact ball is rollingly connected inside the spherical groove. The contact balls are all in contact with the top of the movable ring.

3. The pressure gauge with an anti-collision structure according to claim 1, characterized in that, A cut-off valve is fixedly installed on the connector. A valve lever is rotatably connected to the cut-off valve. A threaded groove is formed at the bottom end of the connector.

4. A pressure gauge with an anti-collision structure according to claim 3, characterized in that, A fixed ring is fixedly connected with an annular frame. The pressure gauge body is located inside the annular frame. A rotating ring is arranged at the bottom of the fixed ring. A push rod is fixedly connected to the bottom of the rotating ring. The push rod is located on one side of the valve lever. An elastic impact mechanism is connected to the rotating ring, and a rotation limiting mechanism is connected between the rotating ring and the annular frame.

5. The pressure gauge with an anti-collision structure according to claim 4, characterized in that, The elastic impact mechanism includes a plurality of fixing blocks. The plurality of fixing blocks are arranged circumferentially inside the rotating ring and fixedly connected to the bottom of the fixed ring. Arc-shaped pins are fixedly connected to the fixing blocks. The arc-shaped pins are coaxially arranged with the rotating ring. Sliding blocks are slidably inserted on the arc-shaped pins. The sliding blocks are fixedly connected to the inner side of the rotating ring. A second spring is sleeved on the arc-shaped pin. The second spring is fixedly connected between the corresponding sliding block and the fixing block.

6. The pressure gauge with an anti-collision structure according to claim 5, characterized in that, The rotation limiting mechanism includes a metal pull rope and a through hole. The metal pull rope is fixedly connected to the annular frame. The through hole is opened on the fixed ring. One end of the metal pull rope extends along the through hole to the lower side of the fixed ring and is fixedly connected to the rotating ring. The metal pull rope is made of gray cast iron. An annular notch is formed on the surface of the end of the metal pull rope close to the rotating ring.

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