A pressure gauge connection assembly for use in cryogenic environments

Abstract

The utility model discloses a kind of pressure gauge joint assembly devices for in low temperature environment, comprising: hydraulic working cylinder, the top end of hydraulic working cylinder is connected with pressure gauge by upper joint, the top end of hydraulic working cylinder is connected with pressure gauge control valve by lower joint, pressure transmission piece is slidably connected in hydraulic working cylinder, and antifreeze medium is filled in hydraulic working cylinder, and antifreeze medium fills between pressure transmission piece and pressure gauge.This utility model fills antifreeze medium in hydraulic working cylinder, pressure transmission piece can move upwards in hydraulic working cylinder under the action of pressure, play the role of transmission pressure, the state that pressure gauge control valve opens, pressure source drives pressure transmission piece to go up, pressure transmission piece promotes antifreeze medium to enter pressure gauge and drive pointer to work, and then the pressure value of pressure source is read from the dial of pressure gauge, using antifreeze medium has lower freezing point, can solve the problem that pressure gauge is frozen under low temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of pressure monitoring technology, and in particular to a pressure gauge connector assembly for use in low-temperature environments. Background Technology

[0002] In many outdoor process industries, such as petroleum, chemical, natural gas, and heating, fluid pressure monitoring is required during production and transportation. Currently, mechanical flat-curved Bourdon tube pressure gauges are the most commonly used. In low-temperature environments, especially in cold outdoor areas, pressure gauges and their connections are prone to freezing and blockage. A common solution is insulation, which involves wrapping the pressure gauge with a layer of insulating cotton. In extremely cold regions such as Northeast and Northwest China, electric heat tracing is also used inside the insulating cotton.

[0003] During the implementation of the above technical solutions, because the pressure gauge dial needs to be exposed for pressure observation and recording, the pressure gauge cannot be completely wrapped with insulation cotton, resulting in poor insulation performance. Wrapping the insulation cotton with electric heat tracing requires power and cable laying, which is not only labor-intensive but also consumes a lot of electricity and is costly. This is especially problematic in the petroleum and petrochemical industries where the number of pressure gauges used outdoors is large and dispersed, often reaching thousands or even tens of thousands. Implementing electric heat tracing insulation with insulation cotton is difficult in these situations. Therefore, most pressure gauges only have a single layer of insulation cotton wrapped around their outer shell. In winter production, particularly in extremely cold environments such as Northeast and Northwest China, where winter temperatures are typically above -30℃, many pressure gauges freeze and become damaged every winter, causing inability to monitor pressure properly. This not only poses serious safety hazards but also increases the workload and management costs associated with pressure gauge repair and replacement. Utility Model Content

[0004] The purpose of this invention is to provide a pressure gauge connector assembly for use in low-temperature environments. By filling the hydraulic working cylinder with antifreeze medium, the pressure transmission component can move upward within the hydraulic working cylinder under pressure, thus transmitting pressure. When the pressure gauge control valve is open, the pressure source drives the pressure transmission component upward, and the pressure transmission component pushes the antifreeze medium into the pressure gauge. The pressure value is read on the pressure gauge dial. By utilizing the low freezing point of antifreeze, the problem of pressure gauge freezing and clogging in low-temperature environments can be solved.

[0005] To achieve the purpose of this utility model, a pressure gauge connector assembly for use in low-temperature environments is provided, comprising: a hydraulic working cylinder, a pressure gauge connected to the top of the hydraulic working cylinder via an upper connector, a pressure gauge control valve connected to the top of the hydraulic working cylinder via a lower connector, a pressure transmission element slidably connected inside the hydraulic working cylinder, and an antifreeze medium filling the space between the pressure transmission element and the pressure gauge. When the pressure gauge control valve is open, the pressure transmission element is driven by a pressure source to slide upward within the hydraulic working cylinder, and the pressure transmission element pushes the antifreeze medium into the pressure gauge, causing the pointer to operate, thereby reading the pressure value of the pressure source from the dial of the pressure gauge.

[0006] As a preferred embodiment of this utility model, the hydraulic working cylinder is configured as a hollow circular tube structure, and the pressure transmission component is adapted to the inner diameter of the hydraulic working cylinder and configured as a cylindrical structure.

[0007] As a preferred embodiment of this invention, the pressure transmission component is provided with a sealing assembly on its side wall.

[0008] As a preferred technical solution of this utility model, the sealing component is a watertight groove formed circumferentially on the side wall of the pressure transmission component. The watertight groove is filled with sealing liquid. Under the action of liquid surface tension, the sealing liquid is higher than the groove opening of the watertight groove and directly contacts the inner wall of the hydraulic working cylinder, thereby completing the bidirectional sealing of the upper and lower ends of the pressure transmission component.

[0009] As a preferred embodiment of this utility model, the number of watertight tanks is two sets, and the two sets of watertight tanks are arranged in parallel.

[0010] As a preferred embodiment of this utility model, the top end of the hydraulic working cylinder is provided with a female thread and the thread is an internal thread, and the bottom end of the hydraulic working cylinder is provided with a male thread and the thread is an external thread.

[0011] As a preferred embodiment of this utility model, the top end of the upper connector is provided with a female thread and the thread is an internal thread, and the bottom end of the upper connector is provided with a male thread and the thread is an external thread.

[0012] As a preferred embodiment of this utility model, the top end of the lower connector is provided as a female thread with an internal thread, and the bottom end of the lower connector is provided as a male thread with an external thread.

[0013] Compared with the prior art, this utility model provides a pressure gauge connector assembly for use in low-temperature environments, which has the following advantages:

[0014] This invention involves filling a hydraulic working cylinder with antifreeze medium. Under pressure, a pressure transmission component moves upward within the cylinder, transmitting pressure. When the pressure gauge control valve is open, the pressure source drives the pressure transmission component upward, pushing the antifreeze medium into the pressure gauge. The pressure value is then read on the gauge dial. The antifreeze's low freezing point solves the problem of pressure gauge freezing and clogging in low-temperature environments. The circumferential watertight groove on the side wall of the pressure transmission component utilizes surface tension to ensure the liquid surface rises above the groove opening and directly contacts the inner wall of the hydraulic working cylinder, achieving a bidirectional seal at both ends of the pressure transmission component. This effectively prevents the medium from the pressure source below the component (water or crude oil) from entering the pressure gauge, and also prevents leakage of the antifreeze medium above the component. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] 1 is the hydraulic working cylinder, 2 is the upper connector, 3 is the lower connector, 4 is the pressure transmission component, and 5 is the watertight tank. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 This utility model provides a pressure gauge connector assembly for use in low-temperature environments, comprising: a hydraulic working cylinder 1, a pressure gauge connected to the top of the hydraulic working cylinder 1 via an upper connector 2, a pressure gauge control valve connected to the top of the hydraulic working cylinder 1 via a lower connector 3, a pressure transmission element 4 slidably connected inside the hydraulic working cylinder 1, and an antifreeze medium filling the space between the pressure transmission element 4 and the pressure gauge. When the pressure gauge control valve is open, the pressure transmission element 4 is driven by a pressure source to slide upward within the hydraulic working cylinder 1, pushing the antifreeze medium into the pressure gauge and causing the pointer to operate, thereby reading the pressure value of the pressure source from the dial of the pressure gauge.

[0019] In one embodiment of this utility model, the hydraulic working cylinder 1 is configured as a hollow circular tube structure, and the pressure transmission component 4 is adapted to be a cylindrical structure with an inner diameter of the hydraulic working cylinder 1.

[0020] In one embodiment of this utility model, a sealing component is provided on the side wall of the pressure transmission element 4.

[0021] In one embodiment of this utility model, the sealing component is a watertight groove 5 formed circumferentially on the side wall of the pressure transmission component 4. The watertight groove 5 is filled with sealing liquid. Under the action of liquid surface tension, the sealing liquid is higher than the groove opening of the watertight groove 5 and directly contacts the inner wall of the hydraulic working cylinder 1, thereby completing the bidirectional sealing of the upper and lower ends of the pressure transmission component 4.

[0022] In one embodiment of this utility model, the number of watertight grooves 5 is two sets, and the two sets of watertight grooves 5 are arranged in parallel.

[0023] In one embodiment of this utility model, the top end of the hydraulic working cylinder 1 is provided with a female thread and the thread is an internal thread, and the bottom end of the hydraulic working cylinder 1 is provided with a male thread and the thread is an external thread.

[0024] In one embodiment of this utility model, the top end of the upper connector 2 is provided as a female thread with an internal thread, and the bottom end of the upper connector 2 is provided as a male thread with an external thread.

[0025] In one embodiment of this utility model, the top end of the lower connector 3 is provided as a female thread with an internal thread, and the bottom end of the lower connector 3 is provided as a male thread with an external thread.

[0026] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A pressure gauge connector assembly for use in low-temperature environments, characterized in that, include: A hydraulic working cylinder (1) is connected to a pressure gauge via an upper connector (2) at its top end and to a pressure gauge control valve via a lower connector (3) at its top end. A pressure transmission component (4) is slidably connected inside the hydraulic working cylinder (1), and the hydraulic working cylinder (1) is filled with antifreeze medium. The antifreeze medium fills the space between the pressure transmission component (4) and the pressure gauge. When the pressure gauge control valve is open, the pressure transmission component (4) is driven by the pressure source to slide upward inside the hydraulic working cylinder (1). The pressure transmission component (4) pushes the antifreeze medium into the pressure gauge, causing the pointer to work, and thus the pressure value of the pressure source is read from the dial of the pressure gauge.

2. The pressure gauge connector assembly for use in low-temperature environments according to claim 1, characterized in that: The hydraulic working cylinder (1) is a hollow circular tube structure, and the pressure transmission component (4) is adapted to the hydraulic working cylinder (1) with an inner diameter set as a cylinder structure.

3. The pressure gauge connector assembly for use in low-temperature environments according to claim 1, characterized in that: The pressure transmission component (4) has a sealing assembly on its side wall.

4. A pressure gauge connector assembly for use in low-temperature environments according to claim 3, characterized in that: The sealing assembly is a watertight groove (5) opened in the circumferential direction on the side wall of the pressure transmission component (4). The watertight groove (5) is filled with sealing liquid. Under the action of liquid surface tension, the sealing liquid is higher than the groove opening of the watertight groove (5) and directly contacts the inner wall of the hydraulic working cylinder (1), thus completing the bidirectional sealing of the upper and lower ends of the pressure transmission component (4).

5. A pressure gauge connector assembly for use in low-temperature environments according to claim 4, characterized in that: The number of watertight tanks (5) is two sets, and the two sets of watertight tanks (5) are arranged in parallel.

6. A pressure gauge connector assembly for use in low-temperature environments according to claim 1, characterized in that: The top end of the hydraulic working cylinder (1) is provided with a female thread and the thread is an internal thread, and the bottom end of the hydraulic working cylinder (1) is provided with a male thread and the thread is an external thread.

7. A pressure gauge connector assembly for use in low-temperature environments according to claim 1, characterized in that: The top of the upper connector (2) is a female thread with an internal thread, and the bottom of the upper connector (2) is a male thread with an external thread.

8. A pressure gauge connector assembly for use in low-temperature environments according to claim 1, characterized in that: The top of the lower connector (3) is a female thread with an internal thread, and the bottom of the lower connector (3) is a male thread with an external thread.

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