Pressure instrument with anti-collision structure

Abstract

The invention relates to the technical field of pressure instruments, in particular to a pressure instrument with an anti-collision structure, which comprises a fixing ring, a joint is fixedly communicated with the axis of the bottom of the fixing ring, a pressure instrument main body is arranged above the fixing ring, and a liquid inlet pipe is fixedly communicated with the bottom of the pressure instrument main body. A movable hose is fixedly communicated between the liquid inlet pipe and the connector, a spherical base is fixedly connected to the liquid inlet pipe, and a spherical lantern ring is arranged on the spherical base in a sleeving mode. Through relative movement between the spherical base and the spherical lantern ring, the pressure instrument main body is subjected to elastic abdicating buffering when the operation platform is collided and vibrates, vibration damage of internal parts of the pressure instrument main body is reduced, the pressure instrument main body is always kept vertical during elastic abdicating, and the working efficiency is improved. Therefore, the influence of the inclination of the pressure instrument main body on the pointing of the pointer is reduced, and the measurement error of the pressure instrument is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure instruments, and in particular 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. The general reference point is selected as atmospheric pressure.

[0003] The patent document with the publication number of 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 protection against the direct external force impact 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 deficiencies 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 fixed ring. A joint is fixedly communicated with the bottom center of the fixed ring. A pressure instrument main body is arranged above the fixed ring. A liquid inlet pipe is fixedly communicated with the bottom of the pressure instrument main body. An active hose is fixedly communicated between the liquid inlet pipe and the joint; 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. 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. A limiting ball is fixedly connected to one end of the circular rod. 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.

[0007] 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 the 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 fixedly connected with 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.

[0008] 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.

[0009] Preferably, 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.

[0010] 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.

[0011] Preferably, a spherical groove is provided at the bottom end of the circular pin, and contact balls are rotatably connected inside the spherical groove. The contact balls are all in contact with the top of the movable ring.

[0012] 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.

[0013] Preferably, an annular frame is fixedly connected to the fixed ring. The pressure gauge main body is located 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.

[0014] Preferably, the elastic impact mechanism includes a plurality of fixed blocks. The plurality of fixed blocks are arranged along the circumference inside the rotating ring and are 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 coaxially arranged with the rotating ring. A sliding block is slidably inserted on the 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.

[0015] Preferably, 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 provided on the fixed ring. One end of the metal pull rope extends below the fixed ring along the through hole and is fixedly connected to the rotating ring. The metal pull rope is made of gray cast iron, and an annular notch is provided on the surface of the metal pull rope near the rotating ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 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 thus reducing the measurement error of the pressure gauge.

[0017] 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 larger 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.

[0018] 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 at different positions of the inclined surface ring and supported, 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.

[0019] 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 restriction of the rotation ring by the rotation restriction mechanism is released, and the rotation ring makes an elastic rotation through 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

[0020] Figure 1 is the first structural schematic diagram of the present invention; Figure 2 is of the present invention Figure 1 The enlarged schematic diagram of the structure at A in; Figure 3 is of the present invention Figure 1 The enlarged schematic diagram of the structure at B in; Figure 4 is the second structural schematic diagram of the present invention; Figure 5 is of the present invention Figure 4 The enlarged schematic diagram of the structure at C in; Figure 6 is the third structural schematic diagram of the present invention; Figure 7 is of the present invention Figure 6 The enlarged schematic diagram of the structure at D in; Figure 8 Schematic cross-sectional view of the spherical base and spherical collar mating structure of the present invention; Figure 9 Schematic view of the mating structure of the first connecting rod and the second connecting rod of the present invention (the limiting sleeve is cut); Figure 10 For the present invention Figure 9 Enlarged schematic view of the structure at position E in; Figure 11 Schematic view of the mating structure of the L-shaped strip, circular pin and contact ball of the present invention.

[0021] In the figure: 1, fixed ring; 2, joint; 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, return pipe; 22, first one-way valve; 23, second one-way valve; 24, inclined surface ring; 25, inclined surface abutting block; 26, inserting block; 27, limiting groove; 28, movable ring; 29, fixed rod; 30, L-shaped strip; 31, circular pin; 32, annular wall; 33, spherical groove; 34, contact ball; 35, stop 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, circular rod; 48, limiting ball; 49, limiting groove. Detailed implementation manners

[0022] 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.

[0023] As Figures 1 to 11 shown, a pressure gauge with an anti-collision structure includes a fixed ring 1, and a joint 2 is fixedly connected and communicated at 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 connected and communicated at the bottom of the pressure gauge main body 3 (combining Figure 1 and Figure 7 ), and a movable hose 5 is fixedly connected and communicated between the liquid inlet pipe 4 and the joint 2; 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 of the arc-shaped grooves 8, and the movable balls 9 are all in contact with the inner wall of the spherical collar 7; 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 lateral 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 received by 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: 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, and then moves inside the liquid inlet pipe 4 along the movable hose 5. Finally, it 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 and the action of 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 sleeve ring 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 sleeve ring 7 tilts, the limiting ball 48 on the circular rod 47 rotates in cooperation in the limiting groove 49, so that the spherical sleeve ring 7 tilts in the moving direction and performs elastic buffering during the tilting process. The spherical sleeve ring 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 through the action of the horizontal displacement mechanism, the limiting ring 12 moves horizontally in cooperation along the moving direction of the spherical sleeve ring 7, so that when the spherical base 6 moves and tilts synchronously with the spherical sleeve ring 7, the spherical base 6 rotates relatively inside the spherical sleeve ring 7, and the movable ball 9 rolls in cooperation between the spherical sleeve ring 7 and the corresponding arc groove 8, reducing the contact friction generated when the spherical sleeve ring 7 and the spherical base 6 move relatively. The two movable balls 9 inside the arc groove 8 perform vertical limiting on the spherical sleeve ring 7 and the spherical base 6 to prevent the spherical base 6 from falling downward inside the spherical sleeve ring 7. Through the movement of the spherical sleeve ring 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 sleeve ring 7, the pressure gauge main body 3 performs elastic yielding buffer 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 tilt of the pressure gauge main body 3 on the pointer indication, and thus reducing the measurement error of the pressure gauge.;

[0024] 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, and 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 penetration 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.

[0025] 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 both 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, and 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 oil. 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 from 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 oil. 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 liquid passage of the piston 16 during the reverse movement inside the limiting sleeve 15 is less, so that the damping of the piston 16 during the rebound of the first spring 19 is larger, and the rebound speed of the sliding rod 14 is restricted, improving the stability when the limiting sleeve 15 rebounds and returns to the initial position, and reducing the elastic impact on the pressure gauge main body 3 caused by the rebound.

[0026] As a further embodiment of the present invention, the position adjustment mechanism includes an inclined surface ring 24 sleeved on the surface of the limit sleeve 15. The inclined surface ring 24 is fixedly connected to the second connection ring 18. A slope abutting block 25 is fixedly connected to the surface of the limit sleeve 15. The slope abutting block 25 is in contact and fit with the inclined surface of the inclined surface ring 24. An insertion block 26 is fixedly connected to the slope abutting block 25. A plurality of limit grooves 27 are formed on the inclined surface of the slope abutting block 25. The insertion block 26 is located inside the corresponding limit groove 27. During operation, the insertion block 26 on the slope abutting block 25 positions the corresponding limit groove 27 on the inclined surface ring 24. While restricting the rotation of the inclined surface ring 24, it supports the second connection ring 18, moves the second connection ring 18 along the sleeved part of the limit sleeve 15, so that the second connection ring 18 drives the inclined surface ring 24 to move, thereby enabling the insertion block 26 on the slope abutting block 25 to disengage from the corresponding limit groove 27 and releasing the rotation restriction on the inclined surface ring 24. Then, after rotating the inclined surface ring 24 and releasing the second connection ring 18, under the elastic extension of the first spring 19, the inclined surface ring 24 and the slope abutting block 25 come into contact again, and the insertion block 26 is inserted into the corresponding limit groove 27 again. Through the contact between the inclined surfaces of the inclined surface ring 24 and the slope abutting block 25, after the inclined surface ring 24 rotates, the slope abutting block 25 can be limited and supported at different positions of the inclined surface ring 24, so that the distance between the second connection ring 18 and the first connection ring 17 can be adjusted by rotating the inclined surface ring 24, and the compression degree of the first spring 19 can be adjusted.

[0027] As a further embodiment of the present invention, the horizontal displacement mechanism includes a movable ring 28 located on the top of the fixed ring 1. The connection part of the joint 2 and the movable hose 5 is located inside the movable ring 28. A plurality of fixed rods 29 (as Figure 3 shown) are fixedly connected to the top of the movable ring 28. One ends of the fixed rods 29 are fixedly connected to the limit ring 12 (as Figure 7 shown). A plurality of L-shaped bars 30 are fixedly connected to the fixed ring 1 along the circumference. One end of the L-shaped bar 30 extends above the movable ring 28 and is fixedly connected with a circular pin 31. A circular wall 32 is fixedly connected to the top of the movable ring 28. During operation, the limit ring 12 and the movable ring 28 are connected by the fixed rods 29, and the top of the movable ring 28 is limited by the circular pin 31 at one end of the L-shaped bar 30, thereby restricting the vertical movement of the movable ring 28. And through the blocking effect of the circular wall 32, the circular pin 31 is prevented from detaching from the top of the movable ring 28, enabling the movable ring 28 to move horizontally within a certain range on the top of the fixed ring 1.

[0028] 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.

[0029] 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.

[0030] 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. During the daily operation of the pressure gauge main body 3, 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 during the movement of large equipment such as forklifts, 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 rotates 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.

[0031] 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 is coaxially arranged with the rotating ring 38. 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 blocks 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, thereby closing the switch of the stop valve 35.

[0032] As a further embodiment of the present invention, the rotation limiting mechanism includes a metal drawstring 44 and a through hole 45. The metal drawstring 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 drawstring 44 extends along the through hole 45 to the lower side of the fixing ring 1 and is fixedly connected to the rotating ring 38. The metal drawstring 44 is made of gray cast iron. An annular notch 46 is opened on the surface of the end of the metal drawstring 44 close to the rotating ring 38. During operation, the rotating ring 38 is pulled and kept in a taut state by the metal drawstring 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 drawstring 44 breaks at the annular notch 46, thereby losing the limit on the rotating ring 38. The relatively low tensile strength and ductility of gray cast iron make the metal drawstring 44 easy to be broken when fractured, increasing the probability of tensile fracture of the metal drawstring 44 when impacted by an external force.

[0033] The working principle of the present invention: 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 due to 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 sleeve ring 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 sleeve ring 7 tilts, the limiting ball 48 on the circular rod 47 rotates in cooperation in the limiting groove 49, so that the spherical sleeve ring 7 tilts in the moving direction and performs elastic buffering during the tilting process. During the movement of the spherical sleeve ring 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 sleeve ring 7, so that when the spherical base 6 moves and tilts synchronously with the spherical sleeve ring 7, the spherical base 6 rotates relatively inside the spherical sleeve ring 7, and the movable ball 9 rolls in cooperation between the spherical sleeve ring 7 and the corresponding arc groove 8, reducing the contact friction generated when the spherical sleeve ring 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 sleeve ring 7 and the spherical base 6 to prevent the spherical base 6 from falling downward along the inside of the spherical sleeve ring 7. Through the movement of the spherical sleeve ring 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 sleeve ring 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 tilt of the pressure gauge main body 3 on the pointer indication, and thus reducing the measurement error of the pressure gauge.

[0034] 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. 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, comprising a fixing ring, characterized in that: A joint is fixedly connected at the bottom axis of the fixed ring, a pressure instrument body is arranged above the fixed ring, a liquid inlet pipe is fixedly connected at the bottom of the pressure instrument body, and a movable hose is fixedly connected between the liquid inlet pipe and the joint; 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 profile, a plurality of arc grooves are opened on the arc surface of the spherical base along the circumferential direction, two movable balls are arranged inside the arc grooves, and the movable balls are 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 rotatably connected to the top of the fixed ring along the circumferential direction, a circular rod is fixedly connected to the top end of the first connecting rod, a limiting ball is fixedly connected to one end of the circular rod, a plurality of limiting grooves are circumferentially provided on the surface of the spherical collar, the limiting balls are rollingly connected in the corresponding limiting grooves, an elastic connecting mechanism is connected between the first connecting rod and the corresponding second connecting rod, a limiting ring is slidingly 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, and a horizontal displacement mechanism is connected to the limiting ring.

2. A pressure instrument with an anti-collision structure according to claim 1, characterized in that: The elastic connecting mechanism includes a sliding rod and a limiting sleeve, which are respectively fixedly connected to the adjacent ends of the first connecting rod and the second connecting rod. One end of the sliding rod passes through the limiting sleeve and extends to the inside of the limiting sleeve and is fixedly connected to a piston. The inside of the limiting sleeve is connected to a rebound buffer mechanism. The surface of the sliding rod is fixedly connected to a first connecting ring, the surface of the limiting sleeve is provided with a second connecting ring, a first spring is provided between the first connecting ring and the second connecting ring, and the second connecting ring is connected to a position adjustment mechanism.

3. The pressure instrument with an anti-collision structure according to claim 2, characterized in that: The rebound buffer mechanism includes multiple compression tubes and multiple rebound tubes. The multiple compression tubes and rebound tubes are fixedly inserted on the piston. The number of compression tubes is greater than the number of rebound tubes. A first one-way valve is fixedly installed on one end of the compression tube close to the limiting sleeve, and a second one-way valve is fixedly installed on one end of the rebound tube close to the sliding rod. The interior of the limiting sleeve is filled with oil.

4. The pressure instrument with an anti-collision structure according to claim 2, characterized in that: The position adjustment mechanism includes a bevel ring, which is sleeved on the surface of the limiting sleeve. The bevel ring is fixedly connected to the second connecting ring. A bevel block is fixedly connected to the surface of the limiting sleeve. The inclined surfaces of the bevel block and the bevel ring are in contact and fit with each other. A plug-in block is fixedly connected to the bevel block. A plurality of limiting grooves are provided on the inclined surface of the bevel block. The plug-in blocks are located inside the corresponding limiting grooves.

5. The pressure instrument with an anti-collision structure according to claim 1, characterized in that: The horizontal displacement mechanism includes a movable ring, which is located at the top of the fixed ring, and the connecting point between the joint and the movable hose is located inside the movable ring. A plurality of fixed rods are fixedly connected to the top of the movable ring, and one end of the fixed rods is fixedly connected to the limit ring. A plurality of L-shaped strips are fixedly connected to the fixed ring along the circumferential direction, and one end of the L-shaped strip extends to the top of the movable ring and is fixedly connected to a circular pin, and the top of the movable ring is fixedly connected to an annular wall.

6. The pressure instrument with an anti-collision structure according to claim 5, characterized in that: A spherical groove is provided at the bottom end of the circular pin, and contact balls are rollingly connected inside the spherical groove, and the contact balls are all in contact with the top of the movable ring.

7. The pressure instrument with an anti-collision structure according to claim 1, characterized in that: A stop valve is fixedly installed on the joint, a valve lever is rotatably connected to the stop valve, and a threaded groove is arranged at the bottom end of the joint.

8. The pressure instrument with an anti-collision structure according to claim 7, characterized in that: An annular frame is fixedly connected to the fixed ring, the main body of the pressure instrument 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.

9. The pressure instrument with an anti-collision structure according to claim 8, characterized in that: The elastic impact mechanism includes a plurality of fixed blocks, which are circumferentially arranged inside the rotating ring and fixedly connected to the bottom of the fixed ring. The fixed blocks are fixedly connected with arc pins, the arc pins and the rotating ring are coaxially arranged, and sliding blocks are slidably inserted on the arc pins. The sliding blocks are fixedly connected to the inner side of the rotating ring. A second spring is sleeved on the arc pin, and the second spring is fixedly connected between the corresponding sliding block and the fixed block.

10. The pressure instrument with an anti-collision structure according to claim 8, 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 provided on the fixed ring. One end of the metal pull rope extends along the through hole to the bottom of the fixed ring and is then fixedly connected to the rotating ring. The metal pull rope is made of gray cast iron. An annular notch is provided on the surface of one end of the metal pull rope close to the rotating ring.

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