Anti-pulse pressure device

Abstract

The utility model relates to the technical field of instruments, in particular to an anti-pulse pressure device which comprises a pressure instrument connector, the upper end of the pressure instrument connector is used for being connected with an air pipe, the lower end of the pressure instrument connector is used for being connected with an air inlet of a pressure gauge, and a pressure reduction pipeline is arranged in the pressure instrument connector. A flow control plate is arranged on the inner wall face of the pressure reduction pipeline, seals the pressure reduction pipeline and is rotatably connected with the pressure reduction pipeline, a telescopic part is further arranged on the flow control plate, the fixed end of the telescopic part is rotatably connected with the inner wall face of the pressure reduction pipeline, and the telescopic end of the telescopic part is rotatably connected with the flow control plate. According to the utility model, the pressure reduction effect can be realized by changing the area of the air circulation channel, the barometer is prevented from being damaged due to instability in a short time or instantaneous high pressure of air pressure, and the barometer can be adapted to different use scenes by adjusting the area of the air circulation channel, so that the pressure meter is prevented from being damaged by pulse pressure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of instrument, more particularly to a kind of anti-pulse pressure device. BACKGROUND

[0002] Pressure gauge is a kind of instrument for measuring pressure data, it is of great significance to master the working condition of equipment and ensure the safe operation of equipment, and pressure gauge is widely used in petroleum and chemical industry pipeline instruments, when connecting pipeline in actual use, due to the influence of factors such as fluid impact, temperature change and process fluctuation, the pressure is unstable or instantaneous high pressure, pulse pressure appears, and instruments and meters are often damaged by unstable pressure value, such as many pressure gauges on offshore platform, pressure transmitter is damaged due to vibration or process pressure impact;

[0003] One of the existing Chinese utility models, the disclosure number CN213455963U discloses a kind of anti-pulse pressure device for built-in pressure instrument, is connected with pressure instrument joint, anti-pulse pressure device for built-in pressure instrument is installed in pressure instrument joint, including passageway, pressure guide hole, first baffle, second baffle and third baffle, passageway is arranged in anti-pulse pressure device for built-in pressure instrument, pressure guide hole is opened in the bottom of passageway, and is at the end far from pressure instrument joint, first baffle, second baffle and third baffle are all installed in passageway, and close to the end connected with pressure instrument joint, passageway includes first inner wall, second inner wall, third inner wall and fourth inner wall;

[0004] In the above technical solution, by reducing the diameter of the pressure guide hole, the flow of the medium is controlled, which can effectively prevent the impact damage of the pressure instrument caused by unstable field working pressure;However, due to the use of fixed baffle for stage change of pressure guide hole diameter for flow control, gas flow control is not easy to adjust, and the control effect is poor, and after the gas flows into the passageway, it will still impact the pressure instrument, resulting in damage. UTILITY MODEL CONTENTS

[0005] In order to solve the problem that the diameter of the pressure guide hole cannot be controlled in the prior art, the utility model provides an anti-pulse pressure device, which can realize pressure reduction effect by changing the area of gas flow passage, avoid damage to the barometer caused by unstable pressure or instantaneous high pressure in a short time, and adapt to different use scenarios by adjusting the area of gas flow passage to prevent damage to the pressure gauge caused by pulse pressure.

[0006] To solve the above technical problems, the utility model adopts the technical scheme: a prevent pulse pressure device, including pressure instrument connector, the upper end of pressure instrument connector is used for connecting with air pipe, the lower end of pressure instrument connector is used for connecting with the air inlet of pressure gauge, be provided with pressure reduction pipeline in pressure instrument connector, be provided with flow control board on the inner wall surface of pressure reduction pipeline, flow control board seals pressure reduction pipeline, flow control board with pressure reduction pipeline rotatable connection, still be provided with telescopic part on flow control board, the fixed end of telescopic part with the inner wall surface rotatable connection of pressure reduction pipeline, telescopic end with flow control board rotatable connection.

[0007] In the technical scheme, the two ends of the pressure instrument connector are respectively connected with the air pipe and the pressure gauge, and only the gas in the air pipe can reach the pressure gauge through the pressure instrument connector. The pressure instrument connector is provided with a pressure reduction pipeline, and the pressure reduction pipeline has a passage for the gas to pass through. The gas in the air pipe enters the pressure gauge through the passage. The inner wall surface of the pressure reduction pipeline is provided with a flow control board, and the flow control board is rotatable connected with the pressure reduction pipeline. When the flow control board is rotated to be parallel to the cross section of the pressure reduction pipeline, the flow control board is completely closed, and at this time, the gas in the air pipe cannot enter the pressure gauge through the passage in the pressure reduction pipeline. When the pressure gauge needs to work, the flow control board is rotated, so that there is a gap between the flow control board and the inner wall surface of the pressure reduction pipeline, and the gas can enter the pressure gauge through the gap. The gap is a passage for the gas to flow. Since the passage is relatively small, the gas can only pass through the passage in small amounts, so that the air pressure behind the flow control board cannot change suddenly, but can only increase with the gradual increase of the gas. Finally, the air pressure behind the flow control board and the air pressure in front of the flow control board reach balance. Through the limiting effect of the flow control board on the gas flow, the rate of change of the air pressure borne by the pressure gauge is slowed down, so that the pressure gauge will not be damaged instantaneously or continuously due to unstable pressure value, and the pressure gauge is protected. The flow control board can be rotated to different angles to make the passage for the gas to flow have different cross-sectional areas, so as to control the gas to flow at different speeds. The flow control board is also provided with a telescopic part, and the two ends of the telescopic part are rotatably connected with the flow control board and the inner wall surface of the pressure reduction pipeline. The telescopic part can adjust and maintain the angle of the flow control board through telescopic adjustment, realizing the automation of the rotation of the flow control board.

[0008] Preferably, the flow control board is a fan-shaped structure, and at least two flow control boards are provided. A convex block is arranged at the midpoint of the arc edge of the flow control board, and the convex block is rotatably connected with the inner wall surface of the pressure reduction pipeline.

[0009] Preferably, a sliding groove is arranged on the lower surface of the flow control board, a sliding block is slidably connected in the sliding groove, and the sliding block is rotatably connected with the telescopic part.

[0010] Preferably, a fixing ring is arranged in the pressure reducing pipeline, an outer ring surface of the fixing ring is connected with an inner wall surface of the pressure reducing pipeline, and the inner wall surface of the pressure reducing pipeline is rotatably connected with the flow control plate.

[0011] Preferably, a rotating device is further arranged below the flow control plate in the pressure reducing pipeline.

[0012] Preferably, the rotating device comprises a rotating shaft and rotating plates, rotating holes are formed in the inner wall surface of the pressure reducing pipeline, the rotating holes are at least two, the two rotating holes are oppositely arranged, two ends of the rotating shaft are respectively inserted into the two rotating holes, and the rotating plates are arranged in plurality, and the rotating plates are uniformly arranged along the circumferential direction of the outer wall surface of the rotating shaft.

[0013] Preferably, the rotating plate is in a semicircular structure, the diameter of the rotating plate is equal to the inner diameter of the pressure reducing pipeline, and the straight edge of the rotating plate is fixedly connected with the rotating shaft.

[0014] Preferably, the surface of the rotating plate is densely covered with a plurality of air holes, and the air holes penetrate through the rotating plate.

[0015] Preferably, a mounting groove is further arranged below the rotating hole, the mounting groove is in communication with the rotating hole, an elastic member is mounted in the mounting groove, the bottom end of the elastic member abuts against the groove bottom of the mounting groove, and the top end of the elastic member abuts against the rotating shaft inserted into the rotating hole.

[0016] Preferably, the pressure instrument connector is in a cylindrical structure, an inner wall surface of the pressure instrument connector is a first threaded surface, an outer wall surface of the pressure reducing pipeline is a second threaded surface, and the first threaded surface is threadedly connected with the second threaded surface.

[0017] Compared with the prior art, the pressure reducing pipeline is provided with the flow control plate, the flow control plate is rotated to control the flow of the gas, the speed of the pressure change is delayed, and the damage of the pressure gauge caused by the unstable or instantaneous high pressure of the gas pressure is avoided. The flow control plate can pass through the gas with different flow rates by rotating at different angles to adapt to different use scenarios. The telescopic member arranged in the pressure reducing pipeline is used to control the rotation of the flow control plate and maintain the position of the flow control plate, and the automation of the rotation and control of the flow control plate is realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the anti-pulse pressure device of the utility model;

[0019] Figure 2 is a half cutaway view of the anti-pulse pressure device of the utility model;

[0020] Figure 3It is the half sectional view of the position of the rotating plate in the anti-impulse pressure device.

[0021] In the drawings: 1, pressure instrument connector; 2, pressure reducing pipeline; 3, flow control plate; 4, telescopic part; 5, rotating device; 21, rotating hole; 22, fixed ring; 31, convex block; 32, sliding groove; 33, sliding block; 51, rotating shaft; 52, rotating plate; 53, air hole; 54, mounting groove; 55, elastic part. DETAILED DESCRIPTION

[0022] The drawings are only used for exemplary illustration, and should not be understood as limiting the patent; in order to better illustrate the embodiment, some components in the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted. The positional relationship described in the drawings is only used for exemplary illustration, and should not be understood as limiting the patent.

[0023] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, structure and operation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and should not be understood as limiting the patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0024] The technical scheme of the present application will be further described in detail below by specific embodiments, and in conjunction with the drawings:

[0025] Embodiment 1

[0026] As Figure 1As shown, a kind of anti-pulse pressure device, including pressure instrument connector 1, the upper end of pressure instrument connector 1 is used to connect with air pipe, the lower end of pressure instrument connector 1 is used to connect with the air inlet of pressure gauge, pressure instrument connector 1 is provided with pressure reduction pipeline 2, the inner wall surface of pressure reduction pipeline 2 is provided with flow control plate 3, flow control plate 3 closes pressure reduction pipeline 2, flow control plate 3 is rotatably connected with pressure reduction pipeline 2, telescopic piece 4 is also provided on flow control plate 3, the fixed end of telescopic piece 4 is rotatably connected with the inner wall surface of pressure reduction pipeline 2, the telescopic end of telescopic piece 4 is rotatably connected with flow control plate 3.The two ends of pressure instrument connector 1 are connected with air pipe and pressure gauge respectively, and the gas in air pipe can only reach pressure gauge through pressure instrument connector 1.Pressure instrument connector 1 is provided with pressure reduction pipeline 2, and pressure reduction pipeline 2 has passage for gas to pass through, and the gas in air pipe enters pressure gauge through the passage.The inner wall surface of pressure reduction pipeline 2 is provided with flow control plate 3, and flow control plate 3 is rotatably connected with pressure reduction pipeline 2.When flow control plate 3 is rotated to be parallel with the cross section of pressure reduction pipeline 2, flow control plate 3 is completely closed, and at this time, the gas in air pipe cannot enter pressure gauge through the passage in pressure reduction pipeline 2.When pressure gauge needs to work, flow control plate 3 is rotated, so that there is gap between flow control plate 3 and the inner wall surface of pressure reduction pipeline 2, and the gas can enter pressure gauge through the gap, and the gap is the passage for gas to flow.Due to the relatively small passage, the gas can only pass through the passage little by little, so that the air pressure behind flow control plate 3 cannot be suddenly changed, but can only increase with the gradual increase of gas, and finally the air pressure behind flow control plate 3 and the air pressure in front of flow control plate 3 reach balance, the limiting effect of flow control plate 3 on gas flow slows down the rate of change of air pressure of pressure gauge, so that the pressure gauge cannot be damaged instantaneously or continuously due to unstable pressure value, and the pressure gauge is protected.Flow control plate 3 can be rotated to different angles to make the passage for gas to flow have different cross-sectional areas, so as to control the gas to flow at different speeds.Flow control plate 3 is also provided with telescopic piece 4, and the two ends of telescopic piece 4 are rotatably connected with flow control plate 3 and the inner wall surface of pressure reduction pipeline 2, and telescopic piece 4 can adjust and keep the angle of flow control plate 3, to realize the automation of rotation of flow control plate 3.

[0027] As Figure 2As shown, the flow control plate 3 has a fan-shaped structure, and at least two flow control plates 3 are provided. A protrusion 31 is located at the midpoint of the arc edge of the flow control plate 3, and the protrusion 31 is rotatably connected to the inner wall of the pressure-reducing pipe 2. The pressure-reducing pipe 2 has a cylindrical structure with a circular cross-section. By setting the flow control plate 3 as a fan-shaped structure, multiple fan-shaped structures can be combined to form a complete circle, matching the shape of the inner wall of the pressure-reducing pipe 2. When the cross-section of the pressure-reducing pipe 2 is parallel to the flow control plate 3, the arc surface of the flow control plate 3 abuts against the inner wall of the pressure-reducing pipe 2, thus completely sealing the pressure-reducing pipe 2 and preventing gas from passing through it. When the flow control plate 3 rotates to form a certain angle with the cross-section of the pressure-reducing pipe 2, a certain gap is formed between the flow control plate 3 and the inner wall of the pressure-reducing pipe 2 to allow gas to pass through. When the flow control plate 3 rotates to a position perpendicular to the inner wall of the pressure-reducing pipe 2, the gap between the flow control plate 3 and the pressure-reducing pipe 2 reaches its maximum, and the gas passage speed also reaches its maximum. At least two flow control plates 3 are provided to ensure that the flow control plates 3 do not contact the outer wall surface of the flow control plates 3 when rotating. After rotation, there is also a gap between the different flow control plates 3, thereby increasing the passage of gas and improving the gas flow speed. A protrusion block 31 is provided at the midpoint of the arc edge of the flow control plate 3. The protrusion block 31 is rotatably connected to the inner wall surface of the pressure reducing pipe 2. The protrusion block 31 serves to fix the position of the flow control plate 3. At the same time, the flow control plate 3 is connected to the inner wall surface of the pressure reducing pipe 2 through the protrusion block 31, so that the flow control plate 3 can maintain a distance from the inner wall surface of the pressure reducing pipe 2 when rotating, avoiding interference between the inner wall surface of the pressure reducing pipe 2 and the flow control plate 3. Each flow control plate 3 has an independent telescopic component 4, and a single telescopic component 4 controls the rotation of a single flow control plate 3.

[0028] like Figure 2 As shown, a groove 32 is provided on the lower surface of the flow control plate 3, and a slider 33 is slidably connected in the groove 32. The slider 33 is rotatably connected to the telescopic member 4. The telescopic end of the telescopic member 4 is connected to the slider 33, which can slide on the groove 32, so that the connection between the telescopic end of the telescopic member 4 and the flow control plate 3 is slidable. This allows the telescopic member 4 to adapt to the change in the relative position of the flow control plate 3 when it rotates, and the telescopic member 4 can drive the flow control plate 3 to rotate within a larger range.

[0029] like Figure 2 As shown, a fixing ring 22 is provided in the pressure-reducing pipe 2. The outer ring surface of the fixing ring 22 is connected to the inner wall surface of the pressure-reducing pipe 2, and the inner wall surface of the pressure-reducing pipe 2 is rotatably connected to the flow control plate 3. The inner ring of the fixing ring 22 can serve as a channel for gas passage. By connecting the fixing ring 22 to the flow control plate 3, the flow control plate 3 can be separated from the inner wall surface of the pressure-reducing pipe 3, so that the flow control plate 3 will not come into contact with the inner wall surface of the pressure-reducing pipe 3 when it rotates.

[0030] Example 2

[0031] The embodiment is similar to the above-mentioned embodiment 1, and the difference is that, as shown in Figure 2 The rotating device 5 is arranged below the flow control plate 3 in the pressure reducing pipeline 2. When the gas enters the pressure reducing pipeline 2, it has a considerable speed under the influence of pressure. The rotating device 5 itself does not have a power source. When the gas passes through the flow control plate 3, it collides with the rotating device 5 below the flow control plate 3, thereby pushing the rotating device 5 to rotate, thereby reducing the speed of the gas and playing a buffering role, avoiding the direct impact of the gas on the pressure gauge, which causes the pressure gauge to be damaged.

[0032] As shown in Figure 2 The rotating device 5 includes a rotating shaft 51 and a rotating plate 52. The inner wall surface of the pressure reducing pipeline 2 is provided with a rotating hole 21. The rotating hole 21 is provided with at least two rotating holes 21. The two rotating holes 21 are oppositely arranged. The two ends of the rotating shaft 51 are respectively inserted into the two rotating holes 21. The rotating plate 52 is provided with a plurality of rotating plates 52. The plurality of rotating plates 52 are uniformly arranged along the circumferential direction of the outer wall surface of the rotating shaft 51. The rotating shaft 51 is used to fix the position of the rotating plate 52. The rotating plate 52 is used to bear the impact of the pressure of the gas. After being impacted, the rotating plate 52 moves, thereby absorbing the kinetic energy of the gas and achieving a buffering effect. With the movement of the rotating plate 52, the buffered gas passes through the rotating device 5 and finally reaches the pressure gauge. The movement of the rotating plate 52 is limited by the rotating shaft 51 and can only rotate around the rotating shaft 51. The rotation of the rotating plate 52 around the rotating shaft can realize a circular motion, so that the rotating plate 52 can buffer the gas for a long time.

[0033] As shown in Figure 2 The rotating plate 52 is a semicircular structure. The diameter of the rotating plate 52 is equal to the inner diameter of the pressure reducing pipeline 2. The straight edge of the rotating plate 52 is fixedly connected with the rotating shaft 51. Different rotating plates 52 can completely close the inner wall surface of the buffer pipeline 2, thereby ensuring that all the gas can pass through the rotating device 5 to reach the pressure gauge after being buffered by the rotating plate 52. The rotating plate 52 can make the gas pass through the rotating plate 52 through rotation.

[0034] As shown in Figure 2 The surface of the rotating plate 52 is densely covered with a plurality of air holes 53. The air holes 53 penetrate the rotating plate 52. When the air pressure reaches balance, the rotating plate 52 can no longer rotate. In order to ensure that the gas can still pass through the rotating plate 52 normally at this time, a plurality of air holes 53 are densely arranged on the surface of the rotating plate 52 for the gas to pass through.

[0035] As shown in Figure 3As shown, the lower part of the rotating hole 21 is also provided with a mounting groove 54, which is communicated with the rotating hole 21, and an elastic member 55 is mounted in the mounting groove 54, the bottom end of the elastic member 55 abuts against the groove bottom of the mounting groove 54, and the top end of the elastic member 55 abuts against the rotating shaft 51 inserted into the rotating hole 21. By arranging the elastic member 55, the pressure of the rotating shaft 51 can be increased, so that the friction between the rotating shaft 51 and the rotating hole 21 is increased, and the gas needs to provide greater pressure, thereby consuming greater kinetic energy of the gas, and achieving better buffering effect.

[0036] Embodiment 3

[0037] This embodiment is similar to the above-mentioned embodiment 1, and the difference is that, as shown in the figure, Figure 2 As shown, the pressure instrument connector 1 is a cylindrical structure, the inner wall surface of the pressure instrument connector 1 is a first threaded surface, the outer wall surface of the pressure reducing pipeline 2 is a second threaded surface, and the first threaded surface and the second threaded surface are threadedly connected. The threaded connection is easy to install and disassemble, and in the use process, only the relative rotation of the pressure instrument connector 1 and the pressure reducing pipeline 2 is needed, so that the pressure reducing pipeline 2 can be disassembled from the pressure instrument connector 1, and the pressure reducing pipeline 2 and the flow control plate 3, the telescopic member 4 and the rotating device 5 inside the pressure reducing pipeline 2 can be replaced, repaired and replaced.

[0038] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or changes can be made. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A pulse pressure protection device, characterized by, The utility model provides a pressure instrument connector, which comprises a pressure instrument connector (1), the upper end of the pressure instrument connector (1) is used for being connected with the trachea, the lower end of the pressure instrument connector (1) is used for being connected with the air inlet of pressure gauge, the pressure instrument connector (1) is provided with pressure reduction pipeline (2), the inner wall surface of pressure reduction pipeline (2) is provided with flow control plate (3), flow control plate (3) closes pressure reduction pipeline (2), flow control plate (3) is rotatably connected with pressure reduction pipeline (2), flow control plate (3) is further provided with telescopic piece (4), the fixed end of telescopic piece (4) is rotatably connected with the inner wall surface of pressure reduction pipeline (2), and the telescopic end of telescopic piece (4) is rotatably connected with flow control plate (3).

2. A device for protecting against impulse pressure according to claim 1, characterized in that The flow control plate (3) is in a fan shape, and at least two flow control plates (3) are provided.

3. A device for protecting against impulse pressure according to claim 1, characterized in that The lower surface of the flow control plate (3) is provided with a sliding groove (32), and the sliding groove (32) is slidably connected with a sliding block (33), and the sliding block (33) is rotatably connected with the telescopic piece (4).

4. A device for protecting against impulse pressure according to claim 1, characterized in that The pressure reduction pipeline (2) is provided with a fixing ring (22), the outer ring surface of the fixing ring (22) is connected with the inner wall surface of the pressure reduction pipeline (2), and the inner wall surface of the pressure reduction pipeline (2) is rotatably connected with the flow control plate (3).

5. A device for protecting against impulse pressure according to claim 1, characterized in that The pressure reduction pipeline (2) is further provided with a rotating device (5) below the flow control plate (3).

6. A device for protecting against impulse pressure according to claim 5, characterized in that The rotating device (5) comprises a rotating shaft (51) and a rotating plate (52), the inner wall surface of the pressure reduction pipeline (2) is provided with a rotating hole (21), at least two rotating holes (21) are provided, the two rotating holes (21) are oppositely arranged, the two ends of the rotating shaft (51) are respectively inserted into the two rotating holes (21), and a plurality of rotating plates (52) are provided, and the plurality of rotating plates (52) are uniformly arranged along the circumferential direction of the outer wall surface of the rotating shaft (51).

7. A device according to claim 6, wherein the pressure pulse is a pressure pulse of a pressure wave. The rotating plate (52) is in a semicircular shape, the diameter of the rotating plate (52) is equal to the inner diameter of the pressure reduction pipeline (2), and the straight edge of the rotating plate (52) is fixedly connected with the rotating shaft (51).

8. A device for preventing pressure pulses according to claim 6, characterized in that The surface of the rotating plate (52) is densely covered with a plurality of air holes (53), and the air holes (53) penetrate through the rotating plate (52).

9. A device for preventing pressure pulses according to claim 6, characterized in that The lower portion of the rotating hole (21) is further provided with a mounting groove (54), the mounting groove (54) is in communication with the rotating hole (21), the mounting groove (54) is provided with an elastic member (55), the bottom end of the elastic member (55) abuts against the groove bottom of the mounting groove (54), and the top end of the elastic member (55) abuts against the rotating shaft (51) inserted into the rotating hole (21).

10. A device for protecting against impulse pressure according to claim 1, characterized in that The pressure instrument connector (1) is in a cylindrical structure, the inner wall surface of the pressure instrument connector (1) is a first threaded surface, the outer wall surface of the pressure reduction pipeline (2) is a second threaded surface, and the first threaded surface is threadedly connected with the second threaded surface.

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