Shock-proof pressure gauge and sealed oil filling system

Abstract

The invention discloses a shock-proof pressure gauge and a sealing oil filling system, and belongs to the technical field of pressure gauges.The shock-proof pressure gauge comprises a gauge body, a filling port and a pressure relief unit, the pressure relief unit comprises a hollow sleeve, a sealing cover plate and a hollow rod, a sliding part is coaxially installed in the hollow sleeve in a clamped mode, and the sliding part freely slides in the hollow sleeve in the axial direction of the hollow sleeve; an annular groove is coaxially formed in the periphery of the sliding part, a sealing ring is installed in the annular groove, a first elastic piece is further arranged in the hollow sleeve, and the first elastic piece generates elastic abutting acting force towards the inner cavity of the meter body on the sliding part. According to the invention, the first elastic piece generates an elastic abutting force on the sliding part, so that when the pressure of silicone oil in the inner cavity of the meter body is increased, the sliding part moves towards the outer side of the meter body, the pressure inside the meter body is released, and the meter body is prevented from being damaged; the sealing effect of the connecting face of the sliding part and the inner wall of the hollow sleeve is good.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure gauges, and in particular relates to a shock-resistant pressure gauge and a sealing oil-filling system. Background Art

[0002] A seismic pressure gauge, also known as an anti-vibration pressure gauge, is an instrument designed to accurately measure pressure in an environment with strong vibrations and severe pulsation of medium pressure. A seismic pressure gauge is usually filled with silicone oil. The purpose of filling with silicone oil is: Shock absorption effect: Silicone oil has excellent viscoelasticity and damping properties. When the pressure gauge is vibrated, it can absorb and slow down the impact of vibration on internal sensitive components, thereby protecting these components from damage and ensuring the accuracy of the pressure gauge readings.

[0003] Damping effect: During the movement of the pointer, silicone oil can provide a damping effect so that the pointer will not shake due to vibration after reaching the set position, which can improve the stability of the reading.

[0004] Lubrication: Silicone oil can also lubricate the mechanical parts inside the pressure gauge, reduce wear and extend the service life of the pressure gauge.

[0005] Anti-corrosion effect: Silicone oil does not react chemically with oxygen, moisture, etc. in the air, so it can prevent corrosion of internal metal parts.

[0006] For example, the patent publication number: CN 216386116 U discloses a shock-resistant oil-filled pressure gauge, including a pressure gauge, the dial of the pressure gauge is filled with silicone oil, the top of the pressure gauge is fixedly connected to a liquid guide tube, one end of the liquid guide tube is fixedly connected to a connecting tube, one end of the connecting tube is fixedly connected to a transfer tube, the bottom end of the transfer tube is connected to the pressure gauge, the side wall of the transfer tube is fixedly connected to a temperature control box and a baffle, the temperature control box is located on the upper side of the baffle, the baffle is connected to the transfer tube, a piston is slidably connected to the inner wall of the temperature control box, and the pressure gauge can be filled with silicone oil. The pressure gauge filled with silicone oil will enhance the overall shockproof effect.

[0007] Although in an oil-filled pressure gauge, the expanded silicone oil will flow into the inside of the transfer tube when the weather is hot to prevent the pressure gauge from being damaged, and in cold weather, the silicone oil in the transfer tube can flow back into the inside of the pressure gauge to fill the pressure gauge, reducing the impact of thermal expansion and contraction of the silicone oil on the pressure gauge; however, in actual use, in a high-temperature environment, the temperature rise needs to be controlled within a certain range. If the pressure gauge is always in a high-temperature environment and the internal silicone oil pressure increases excessively, it is easy for the silicone oil to seep out from the shell gap of the pressure gauge. If the silicone oil cannot leak out after the pressure increases, it may cause the internal pressure of the pressure gauge to increase, thereby causing damage to the gauge body. Therefore, a pressure gauge is needed that can relieve pressure when the silicone oil temperature continues to rise. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a seismic-resistant pressure gauge and a sealing oil-filling system.

[0009] The technical solution adopted to solve the above technical problems is: A seismic-resistant pressure gauge comprises a gauge body and a filling port arranged on the outer wall of the gauge body, the filling port is provided with a pressure relief unit, the pressure relief unit comprises a hollow sleeve inserted in the filling port, a sealing cover plate is fixedly connected to the end of the hollow sleeve exposed from the filling port, the sealing cover plate is detachably connected to the end face of the filling port, a hollow rod is vertically slidably penetrated through the end face of the sealing cover plate, a sliding part is coaxially mounted in the hollow sleeve, the sliding part slides freely in the axial direction of the hollow sleeve, an annular groove is coaxially opened on the periphery of the sliding part, a sealing ring is installed in the annular groove, a first elastic member is further provided in the hollow sleeve, the first elastic member generates an elastic resisting force toward the inner cavity of the gauge body on the sliding part.

[0010] Furthermore, the first elastic member is a decompression spring wrapped around the periphery of the hollow rod, and both ends of the decompression spring in the elastic force direction elastically press against the sliding part and the sealing cover plate respectively.

[0011] Furthermore, the sealing ring is hollow inside and is connected with an air nozzle on one side facing the sealing cover plate. An expansion mechanism is provided in the hollow sleeve. The expansion mechanism is used to inflate the sealing ring through the air nozzle when the sliding part moves toward the outside of the inner cavity of the watch body, so as to expand the volume of the sealing ring.

[0012] Furthermore, the expansion mechanism includes a follower part fixedly sleeved on the periphery of the hollow rod, the follower part is coaxially engaged with the inner cavity of the hollow sleeve, and forms an air storage cavity with the inner cavity of the hollow sleeve, and the end of the air nozzle away from the sealing ring penetrates the sliding part and the follower part in sequence and is connected with the inside of the air storage cavity.

[0013] Furthermore, a stopper is coaxially fixedly connected to a side opening of the hollow sleeve facing the inner cavity of the watch body, a plurality of communication openings in the form of through holes are formed on an end surface of the stopper, and the stopper is located below the sliding part.

[0014] Furthermore, one end of the hollow rod that passes through the hollow sleeve is fixedly connected to a connecting cover plate, and the connecting cover plate is detachably connected to the upper end surface of the sliding part. A filling hole in the form of a through hole is opened in the sliding part, and the filling hole is connected to the center hole of the hollow rod. A connecting mechanism is provided in the sliding part, and the connecting mechanism is used to connect the mouth on the lower side of the filling hole with the inner cavity of the watch body when the end surface of the sliding part and the end surface of the stop part abut against each other.

[0015] Furthermore, a joint is installed at the upper end of the hollow rod.

[0016] Furthermore, the connecting mechanism includes a floating stopper engaged in a connecting cavity formed by the sliding portion, the floating stopper slides freely up and down in the connecting cavity, and a plurality of notch grooves are formed around the floating stopper, a sealing column is fixedly connected to the lower end face of the floating stopper, the outer diameter of the sealing column is matched with the aperture of the filling hole, a second elastic member is installed in the connecting cavity, the second elastic member has an elastic resisting force on the floating stopper toward the inner cavity of the watch body, and a resisting column corresponding to the sealing column is fixedly connected to the upper end face of the stopper.

[0017] Furthermore, a rubber layer is provided on the surface of the sealing column.

[0018] A sealing oil-filling system for a seismic-resistant pressure gauge comprises the pressure relief unit as described above.

[0019] The beneficial effects of the present invention are as follows: In the present invention, the first elastic member generates an elastic resisting force on the sliding part, and when the silicone oil pressure in the inner cavity of the meter body increases, the sliding part moves toward the outer side of the meter body, thereby releasing the pressure inside the meter body to prevent the meter body from being damaged. In addition, the sealing ring is used to achieve a better sealing effect on the connection surface between the sliding part and the inner wall of the hollow sleeve. In the present invention, when the sliding part moves toward the outer side of the meter body, the distance between the follower part and the sealing cover plate is reduced, so that the air in the air storage cavity is squeezed to the air nozzle, and then enters the sealing ring, so that the volume of the sealing ring expands, thereby improving the sealing effect of the sealing ring and the inner wall of the hollow sleeve, and preventing the sealing performance of the sealing ring and the inner wall of the hollow sleeve from decreasing when the pressure in the inner cavity of the meter body increases due to the increase in the temperature of the silicone oil; In the present invention, when the silicone oil level in the meter body drops, the hollow rod is pushed, so that the hollow rod drives the sliding part to move in the direction of the stop part, and the abutting column squeezes the sealing column, and then the sealing column is retracted into the connecting cavity, so that the connecting cavity and the inner cavity of the meter body are connected, and then silicone oil can be filled into the hollow rod through the joint, and the silicone oil then enters the inner cavity of the meter body from the middle hole of the hollow rod and the connecting cavity, thereby realizing the sealed filling of silicone oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a seismic-resistant pressure gauge in the present invention; Figure 2 yes Figure 1 Schematic diagram of the explosion decomposition of the structure; Figure 3 yes Figure 1 Schematic diagram of positional relationship after the table body is omitted; Figure 4 yes Figure 3 Schematic diagram of the explosion decomposition of the structure; Figure 5 yes Figure 3 Schematic diagram of the positional relationship of some structures after being cut open from another perspective; Figure 6 yes Figure 5 A magnified schematic diagram of the local structure at point A.

[0021] Figure numerals: 1. meter body; 2. filling port; 3. sealing cover plate; 4. joint; 5. hollow rod; 6. hollow sleeve; 7. pressure relief spring; 8. follower; 9. floating block; 10. sealing ring; 11. stopper; 12. sliding part; 13. buffer spring; 14. connecting port; 15. air nozzle; 16. notch groove; 17. connecting cover plate; 18. push column; 19. air storage chamber; 20. filling hole; 21. sealing column; 22. connecting chamber. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-Figure 6 As shown; The present embodiment provides a seismic-resistant pressure gauge, comprising a gauge body 1 and a filling port 2 arranged on the outer wall of the gauge body 1, characterized in that a pressure relief unit is arranged on the filling port 2, the pressure relief unit comprises a hollow sleeve 6 inserted into the filling port 2, a sealing cover plate 3 is fixedly connected to the end of the hollow sleeve 6 exposed from the filling port 2, the sealing cover plate 3 is detachably connected to the end face of the filling port 2, a hollow rod 5 is vertically slidably penetrated on the end face of the sealing cover plate 3, a sliding part 12 is coaxially mounted in the hollow sleeve 6, and the sliding part 12 is freely slidable in the hollow sleeve 6 along the axial direction of the hollow sleeve 6 , the periphery of the sliding part 12 is coaxially provided with an annular groove, in which a sealing ring 10 is installed. When the sliding part 12 moves toward the outer side of the meter body 1, the distance between the follower and the sealing cover plate 3 will be reduced, so that the air in the air storage cavity is squeezed to the air nozzle, and then enters the sealing ring 10, so that the volume of the sealing ring 10 expands, thereby improving the sealing effect of the sealing ring 10 and the inner wall of the hollow sleeve 6, and preventing the sealing performance of the sealing ring 10 and the inner wall of the hollow sleeve 6 from decreasing when the pressure in the inner cavity of the meter body 1 increases due to the increase in the temperature of the silicone oil. A first elastic member is also provided in the hollow sleeve 6, and the first elastic member generates an elastic resisting force on the sliding part 12 toward the inner cavity of the meter body 1; the first elastic member generates an elastic resisting force on the sliding part, and then when the pressure of the silicone oil in the inner cavity of the meter body increases, the sliding part moves toward the outer side of the meter body, thereby achieving pressure relief inside the meter body, preventing the meter body from being damaged. In addition, the sealing ring is used to make the sealing effect of the connection surface between the sliding part and the inner wall of the hollow sleeve better.

[0024] Among them, a protrusion is welded on the end face of the sealing cover plate 3, and the hollow rod 5 is inserted on the protrusion and slides freely. The protrusion produces a radial reinforcement effect on the hollow rod 5. A sliding part 12 is coaxially mounted in the hollow sleeve 6. The sliding part 12 slides freely along the axial direction of the hollow sleeve 6 in the hollow sleeve 6. An annular groove is coaxially opened on the periphery of the sliding part 12, and a sealing ring 10 is installed in the annular groove. A decompression spring 7 is wound around the periphery of the hollow rod 5, and the two ends of the decompression spring 7 in the elastic direction elastically press against the sliding part 12 and the sealing cover plate 3 respectively; when the silicone oil pressure in the inner cavity of the meter body 1 is normal When the pressure of the silicone oil increases, the sliding part 12 will gradually slide in the direction of the sealing cover plate 3 under the action of the pressure of the silicone oil, so that the compression degree of the sliding part 12 on the decompression spring 7 increases, and the sliding part 12 is buffered by the compression of the decompression spring 7, thereby achieving pressure relief when the silicone oil pressure increases.

[0025] Furthermore, the sealing ring 10 is hollow inside and is connected with an air nozzle 15 on one side facing the sealing cover plate 3. A follower 8 is fixedly sleeved on the periphery of the hollow rod 5. The follower 8 is disc-shaped and coaxially engaged with the inner cavity of the hollow sleeve 6, and forms an air storage cavity 19 with the inner cavity of the hollow sleeve 6. The end of the air nozzle 15 away from the sealing ring 10 penetrates the sliding part 12 and the follower 8 in sequence and is connected with the inside of the air storage cavity 19. When the sliding part 12 moves toward the outside of the meter body 1, the distance between the follower 8 and the sealing cover plate 3 will be reduced, so that the air in the air storage cavity 19 will be squeezed to the air nozzle 15, and then enter the sealing ring 10, so that the volume of the sealing ring 10 expands, thereby improving the sealing effect of the sealing ring 10 and the inner wall of the hollow sleeve 6, and preventing the sealing performance of the sealing ring 10 and the inner wall of the hollow sleeve 6 from decreasing when the pressure in the inner cavity of the meter body 1 increases due to the increase in the silicone oil temperature.

[0026] A joint 4 is installed at the upper end of the hollow rod 5, and the joint 4 is connected to an external silicone oil delivery device through a pipeline. One end of the hollow rod 5 that penetrates into the hollow sleeve 6 is fixedly connected to a connecting cover plate 17, and the connecting cover plate 17 is detachably connected to the upper end surface of the sliding part 12. A filling hole 20 in the form of a through hole is opened in the sliding part 12, and the filling hole 20 is connected with the middle hole of the hollow rod 5. A stopper 11 is coaxially fixed to the side of the hollow sleeve 6 facing the inner cavity of the meter body 1. A plurality of communication ports 14 in the form of through holes are opened on the end surface of the stopper 11, and the stopper 11 is located below the sliding part 12. A blind hole-shaped communication cavity 2 is opened on the upper end surface of the sliding part 12. 2. The connecting cavity 22 is connected with the filling hole 20. A floating stopper 9 is coaxially engaged in the connecting cavity 22, and the floating stopper 9 slides freely up and down in the connecting cavity 22. A plurality of notch grooves 16 are provided on the periphery of the floating stopper 9. A sealing column 21 is fixedly connected to the lower end surface of the floating stopper 9. The outer diameter of the sealing column 21 matches the aperture of the filling hole 20. A buffer spring 13 is installed in the connecting cavity 22. The two ends of the buffer spring 13 in the elastic force direction elastically abut against the connecting cover plate 17 and the end surface of the floating stopper 9, respectively. A pressing column 18 corresponding to the sealing column 21 is fixedly connected to the upper end surface of the stopper 11. The outer diameter of the pressing column 18 is smaller than the outer diameter of the sealing column 21. When the silicone oil level in the meter body 1 drops (at this time, the pressure in the inner cavity of the meter body 1 is restored), the hollow rod 5 is pushed, so that the hollow rod 5 drives the sliding part 12 to move in the direction of the stopper 11, and the abutting column 18 squeezes the sealing column 21, so that the sealing column 21 is retracted into the connecting cavity 22, so that the connecting cavity 22 and the inner cavity of the meter body 1 are connected, and then the silicone oil can be filled into the middle hole of the hollow rod 5 through the joint 4, and the silicone oil then enters the inner cavity of the meter body 1 from the middle hole of the hollow rod 5 and the connecting cavity 22, so as to realize the sealing filling of the silicone oil. When the hollow rod 5 is loosened, the sliding part 12 is moved in the direction of the stopper 11 under the release of the elastic potential energy of the decompression spring 7. The moving part 12 will slide in the hollow sleeve 6 toward the stop part 11, and the silicone oil has a certain pressure at this time, so that the sliding part 12 stops sliding under the pressure of the silicone oil, and the abutting column 18 and the sealing column 21 have no contact. At the same time, the buffer spring 13 will generate a thrust on the floating stopper 9, so that the end face of the floating stopper 9 abuts against the inner wall of the connecting cavity 22, and the sealing column 21 is inserted into the filling hole 20, thereby sealing the filling hole 20. In addition, a rubber layer (not shown in the figure) is provided on the surface of the sealing column 21. By providing the rubber layer, the sealing effect of the sealing column 21 on the filling hole 20 is better.

[0027] The working principle of this embodiment is as follows: When the pressure in the inner cavity of the meter body 1 increases, the sliding part 12 will gradually slide toward the sealing cover plate 3 under the pressure of the silicone oil, so that the compression degree of the pressure reducing spring 7 by the sliding part 12 increases, and then the sliding part 12 is buffered by the compression of the pressure reducing spring 7, thereby increasing the storage volume of the silicone oil, while the molecular weight of the silicone oil remains unchanged, so that the pressure of the silicone oil is relieved when the pressure increases, preventing the meter body 1 from being damaged by excessive pressure; When oil filling is required, use an external silicone oil delivery device to connect the joint 4, and push the hollow rod 5 by hand, so that the hollow rod 5 drives the sliding part 12 to move in the direction of the stop part 11, and the abutting column 18 squeezes the sealing column 21, and then the sealing column 21 is retracted into the connecting cavity 22, so that the connecting cavity 22 and the inner cavity of the meter body 1 are connected, and then silicone oil can be filled into the middle hole of the hollow rod 5 through the joint 4, and the silicone oil then enters the inner cavity of the meter body 1 from the middle hole of the hollow rod 5 and the connecting cavity 22, so as to realize the sealed filling of silicone oil.

[0028] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0029] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A seismic-resistant pressure gauge, comprising a gauge body (1) and a filling port (2) provided on an outer wall of the gauge body (1), characterized in that: The filling port (2) is provided with a pressure relief unit, the pressure relief unit comprising a hollow sleeve (6) inserted into the filling port (2), the end of the hollow sleeve (6) exposed from the filling port (2) is fixedly connected with a sealing cover plate (3), the sealing cover plate (3) is detachably connected to the end face of the filling port (2), a hollow rod (5) is vertically slidably penetrated through the end face of the sealing cover plate (3), a sliding part (12) is coaxially mounted in the hollow sleeve (6), the sliding part (12) slides freely in the axial direction of the hollow sleeve (6) in the hollow sleeve (6), an annular groove is coaxially opened on the periphery of the sliding part (12), a sealing ring (10) is installed in the annular groove, and a first elastic member is further provided in the hollow sleeve (6), the first elastic member generates an elastic resisting force on the sliding part (12) toward the inner cavity of the meter body (1).

2. The seismic-resistant pressure gauge according to claim 1, characterized in that: The first elastic member is a pressure relief spring (7) sleeved around the periphery of the hollow rod (5), and the two ends of the pressure relief spring (7) in the elastic force direction elastically press against the sliding portion (12) and the sealing cover plate (3) respectively.

3. The seismic-resistant pressure gauge according to claim 1, characterized in that: The sealing ring (10) is hollow inside and is connected to a gas nozzle (15) on a side facing the sealing cover plate (3). An expansion mechanism is provided in the hollow sleeve (6). The expansion mechanism is used to inflate the sealing ring (10) through the gas nozzle (15) when the sliding part (12) moves toward the outside of the inner cavity of the watch body (1), so as to expand the volume of the sealing ring (10).

4. The seismic-resistant pressure gauge according to claim 3, characterized in that: The expansion mechanism comprises a follower part (8) fixedly sleeved on the periphery of the hollow rod (5); the follower part (8) is coaxially engaged with the inner cavity of the hollow sleeve (6) and forms an air storage cavity (19) with the inner cavity of the hollow sleeve (6); an end of the air nozzle (15) away from the sealing ring (10) penetrates the sliding part (12) and the follower part (8) in sequence and is in communication with the interior of the air storage cavity (19).

5. The seismic-resistant pressure gauge according to claim 1, characterized in that: A stopper (11) is coaxially fixedly connected to an opening of the hollow sleeve (6) on one side facing the inner cavity of the meter body (1), a plurality of communication openings (14) in the form of through holes are formed on the end surface of the stopper (11), and the stopper (11) is located below the sliding portion (12).

6. The seismic-resistant pressure gauge according to claim 5, characterized in that: One end of the hollow rod (5) that penetrates into the hollow sleeve (6) is fixedly connected to a connecting cover plate (17), and the connecting cover plate (17) is detachably connected to the upper end surface of the sliding part (12). A filling hole (20) in the form of a through hole is provided in the sliding part (12), and the filling hole (20) is connected to the middle hole of the hollow rod (5). A connecting mechanism is provided in the sliding part (12), and the connecting mechanism is used to connect the lower side of the filling hole (20) with the inner cavity of the meter body (1) when the end surface of the sliding part (12) and the end surface of the stopper (11) are in contact with each other.

7. The seismic-resistant pressure gauge according to claim 6, characterized in that: A joint (4) is installed at the upper end of the hollow rod (5).

8. The seismic-resistant pressure gauge according to claim 6, characterized in that: The connecting mechanism comprises a floating stopper (9) engaged in a connecting cavity (22) provided by the sliding portion (12); the floating stopper (9) slides freely up and down in the connecting cavity (22); and a plurality of notched grooves (16) are provided on the periphery of the floating stopper (9); a sealing column (21) is fixedly connected to the lower end surface of the floating stopper (9); the outer diameter of the sealing column (21) is adapted to the aperture of the filling hole (20); a second elastic member is installed in the connecting cavity (22); the second elastic member has an elastic resisting force on the floating stopper (9) toward the inner cavity of the meter body (1); and a resisting column (18) corresponding to the sealing column (21) is fixedly connected to the upper end surface of the stopper portion (11).

9. The seismic-resistant pressure gauge according to claim 8, characterized in that: A rubber layer is provided on the surface of the sealing column (21).

10. A sealing oil filling system for a seismic pressure gauge, characterized in that: It comprises the pressure relief unit as claimed in claim 1.

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