Anti-freezing pressure guide pipe

Abstract

The utility model belongs to the technical field of anti-freezing of pressure guide pipes, and discloses an anti-freezing pressure guide pipe which comprises a pressure guide pipe body, a first liquid stop valve and a pressure measuring instrument, the bottom end of the pressure guide pipe body is communicated with a fire hose and fixedly connected with the fire hose, the top end of the pressure guide pipe body can penetrate out of the ground, and anti-freezing oil can be poured into the pressure guide pipe body; the first liquid stop valve is arranged on the pressure guide pipe body, is positioned below the ground and is close to the fire hose, and the first liquid stop valve can selectively adjust the circulation or separation of water in the fire hose and the anti-freezing oil in the pressure guide pipe body; the pressure measuring instrument is detachably connected with the top end of the pressure guiding pipe body and used for measuring the pressure of liquid in the pressure guiding pipe body. The pressure measuring device can effectively solve the problem that in the prior art, pressure measurement is unstable after the interior of the pressure guide pipe is frozen, the interior of the pressure guide pipe can still be kept not frozen in extremely cold weather, the pressure in the pressure guide pipe can be continuously and stably measured, the investment cost is low, and later maintenance is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure lead pipe anti -freezing technical field especially relates to a kind of anti -freezing pressure lead pipe. BACKGROUND

[0002] In the northern winter climate is more severe cold area, fire water pipeline usually uses the way of buried laying, to prevent pipe water icing. However, in order to facilitate on-site personnel real-time observation pipeline pressure, pressure gauge or pressure transmitter is often through pressure lead pipe to ground pressure signal. Since the pressure lead pipe diameter is small, in severe cold environment, icing phenomenon occurs easily, leading to pressure signal cannot be normally transmitted, not only affect system monitoring, but also can damage pressure measuring instrument.

[0003] In order to prevent the pressure lead pipe from icing and affecting the stability of pressure measurement, usually the pressure lead pipe is wrapped with thermal insulation material outside, which can slow down heat loss to a certain extent, but in extreme weather conditions such as cold wave, pipe freezing still occurs. Another method is to install an electric heat tracing device on the pressure lead pipe, which can effectively maintain the temperature inside the pipe and stabilize the pressure measurement, but the investment cost is high, the energy utilization efficiency is low, and the maintenance cost is high. SUMMARY

[0004] The utility model aims at providing a kind of anti -freezing pressure lead pipe to solve the problem of unstable pressure measurement after the pressure lead pipe icing in prior art, which can still keep the pressure lead pipe from icing in extremely cold weather, and can continuously and stably measure the pressure in the pipe, with low investment cost and convenient maintenance in later period.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An anti -freezing pressure lead pipe, comprising:

[0007] A pressure lead pipe body, the bottom end of which is communicated with a fire water pipe and fixedly connected with the fire water pipe, the top end of the pressure lead pipe body can penetrate out of the ground, and the pressure lead pipe body can be filled with anti -freezing oil;

[0008] A first liquid stop valve is arranged on the pressure lead pipe body and located below the ground near the fire water pipe, and the first liquid stop valve can selectively adjust the flow or block of water in the fire water pipe and anti -freezing oil in the pressure lead pipe body;

[0009] A pressure measuring instrument is detachably connected with the top end of the pressure lead pipe body for real-time measurement of the liquid pressure in the pressure lead pipe body.

[0010] Optionally, one end of the first liquid stop valve is connected with the bottom end of the pressure lead pipe body, and the other end is connected with the fire water pipe.

[0011] Optionally, the first stop valve can be detachably connected to both the fire water pipe and the pressure tap body.

[0012] Optionally, the antifreeze pressure tapping pipe further includes a second check valve, which is located on the body of the pressure tapping pipe above the ground and close to the pressure measuring instrument. The second check valve can selectively adjust the flow or blockage of the antifreeze oil in the body of the pressure tapping pipe and the pressure measuring instrument.

[0013] Optionally, the pressure tapping tube body includes a first pressure tapping tube body and a second pressure tapping tube body, and the pressure measuring instrument, the first pressure tapping tube body, the second stop valve, the second pressure tapping tube body and the first stop valve are sequentially threaded together.

[0014] Optionally, the pressure-relief valve is provided on the pressure-sensing tube body, and the pressure-relief valve is located between the first stop valve and the second stop valve.

[0015] Optionally, the antifreeze pressure tapping pipe further includes multiple sealing elements, which are disposed at the connection points between the first stop valve and the fire water pipe, and between the first stop valve and the second pressure tapping pipe body; and / or

[0016] The sealing element is located at the connection between the first pressure-feeding tube body and the second stop valve, and at the connection between the second stop valve and the second pressure-feeding tube body; and / or

[0017] The sealing element is located at the connection between the first pressure-sensing tube body and the pressure measuring instrument.

[0018] Optionally, the seal is a sealing ring.

[0019] Optionally, the first stop valve and / or the second stop valve may be needle valves.

[0020] Optionally, the antifreeze oil includes lubricating oil.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides an antifreeze pressure tapping pipe, comprising a pressure tapping pipe body, a first check valve, and a pressure measuring instrument. In extremely cold weather, the operator can first adjust the first check valve to close the connection between the fire water pipe and the pressure tapping pipe body, then inject antifreeze oil into the pressure tapping pipe body, and subsequently open the first check valve to reconnect the water in the fire water pipe with the antifreeze oil in the pressure tapping pipe. Because the density of antifreeze oil is less than that of water, the antifreeze oil will always float on the water surface, ensuring that the portion of the pressure tapping pipe exposed above ground is always filled with antifreeze oil, effectively preventing freezing. Simultaneously, due to the excellent fluid pressure transmission characteristics between antifreeze oil and water, the pressure measuring instrument can continuously, stably, and accurately reflect the pressure status within the fire water pipe, facilitating observation and recording by the operator. Furthermore, the pressure measuring instrument is detachably connected to the top of the pressure tapping pipe body, facilitating future replacement and maintenance. In addition, the operator can select an appropriate type of antifreeze oil according to different outdoor temperature conditions to ensure that freezing does not occur even in extremely cold weather. After the temperature rises, the antifreeze oil inside the pressure tapping pipe can be extracted, filling the pipe with water so that the pressure measuring instrument can directly measure the water pressure in the fire water pipe. This method is flexible, convenient, and low-cost, and easy to maintain later. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the antifreeze pressure tube in this utility model.

[0024] In the picture:

[0025] 100. Fire hose; 200. Ground;

[0026] 1. Pressure tapping tube body; 11. First pressure tapping tube body; 12. Second pressure tapping tube body; 2. First check valve; 3. Pressure measuring instrument; 4. Second check valve. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] Please refer to Figure 1 As shown, this utility model provides an antifreeze pressure tapping pipe, including a pressure tapping pipe body 1, a first check valve 2, and a pressure measuring instrument 3. The bottom end of the pressure tapping pipe body 1 is connected to and fixedly connected to a fire water pipe 100. The top end of the pressure tapping pipe body 1 can extend out of the ground 200. Antifreeze oil can be filled into the pressure tapping pipe body 1. The first check valve 2 is located on the pressure tapping pipe body 1 and is located below the ground 200 near the fire water pipe 100. The first check valve 2 can selectively adjust or block the flow of water in the fire water pipe 100 and the antifreeze oil in the pressure tapping pipe body 1. The pressure measuring instrument 3 is detachably connected to the top end of the pressure tapping pipe body 1 and is used to measure the liquid pressure in the pressure tapping pipe body 1.

[0032] In extremely cold weather, operators can first close the connection between the fire water pipe 100 and the pressure tapping pipe body 1 by adjusting the first check valve 2. Then, antifreeze oil is injected into the pressure tapping pipe body 1, followed by opening the first check valve 2 to reconnect the water in the fire water pipe 100 with the antifreeze oil in the pressure tapping pipe. Because the density of antifreeze oil is less than that of water, it will always float on the water surface, ensuring that the portion of the pressure tapping pipe exposed above 200mm above the ground is always filled with antifreeze oil, effectively preventing freezing. Simultaneously, due to the excellent fluid pressure transmission characteristics between antifreeze oil and water, the pressure measuring instrument 3 can continuously, stably, and accurately reflect the pressure status within the fire water pipe 100, facilitating observation and recording by operators. Furthermore, the pressure measuring instrument 3 is detachably connected to the top of the pressure tapping pipe body 1, facilitating future replacement and maintenance. In addition, operators can select the appropriate type of antifreeze oil according to different outdoor temperature conditions to ensure that freezing does not occur even in extremely cold weather. After the temperature rises, the antifreeze oil in the pressure tapping pipe body 1 can be extracted, so that the pressure tapping pipe body 1 is filled with water, and the pressure measuring instrument 3 can directly measure the water pressure in the fire water pipe 100. It is flexible and convenient to use and distribute, and has low cost and is easy to maintain later.

[0033] Optionally, antifreeze oil may be used, but is not limited to, lubricating oil; no specific limitation is made here.

[0034] Optionally, the pressure measuring instrument 3 is threaded to the top end of the pressure tapping tube body 1; this facilitates quick replacement when the pressure measuring instrument 3 is damaged or requires calibration.

[0035] In the event of extremely cold weather, to prevent pressure measurement instability caused by freezing of the pressure tapping pipe section between the fire water pipe 100 and the ground 200, one end of the first check valve 2 is connected to the bottom end of the pressure tapping pipe body 1, and the other end is connected to the fire water pipe 100. This structural design allows the first check valve 2 to be placed as close as possible to the fire water pipe 100, thereby ensuring that the antifreeze can fully fill the entire length of the pressure tapping pipe body 1, effectively avoiding freezing of the pipe section between the ground 200 and the fire water pipe 100, and improving the reliability and pressure measurement stability of the entire antifreeze pressure tapping pipe in cold environments.

[0036] Specifically, the first check valve 2 can be detachably connected to both the fire water pipe 100 and the pressure tap body 1. Because of the detachable connection, it is more convenient to maintain the device later. The damaged parts can be repaired or replaced without disassembling the entire device, which effectively improves the maintainability and flexibility of the device.

[0037] It is understandable that the first check valve 2 is connected to the fire water pipe 100 and the pressure tap body 1 by threads. The threaded connection structure is easy to install and convenient for quick disassembly and assembly.

[0038] In other embodiments, the first check valve 2 can also be connected to the fire water pipe 100 and the pressure tap body 1 via flanges, which is not specifically limited here.

[0039] In some embodiments, the antifreeze pressure tapping pipe further includes a second check valve 4, which is located on the pressure tapping pipe body 1 and above ground level, close to the pressure measuring instrument 3. The second check valve 4 can selectively adjust the flow or isolation of antifreeze oil in the pressure tapping pipe body 1 and the pressure measuring instrument 3. Before calibration or pressure testing, the operator needs to first close the first check valve 2 to prevent water from the fire water pipe 100 from flowing into the pressure tapping pipe body 1 and keep the antifreeze oil inside the pipe undisturbed. Then, by adjusting the second check valve 4, the flow or isolation between the antifreeze oil and the pressure measuring instrument 3 is controlled. When the valve is closed, the antifreeze oil is isolated from the pressure measuring instrument 3, ensuring that the pressure measuring instrument 3 can be calibrated independently. When the valve is open, the antifreeze oil flows, and the pressure test operation is performed.

[0040] Optionally, the pressure tapping tube body 1 includes a first pressure tapping tube body 11 and a second pressure tapping tube body 12. The pressure measuring instrument 3, the first pressure tapping tube body 11, the second stop valve 4, the second pressure tapping tube body 12 and the first stop valve 2 are connected in sequence by threads. The threaded connection allows each component to be easily disassembled and replaced without special tools or complicated steps, reducing the difficulty of maintenance.

[0041] Optionally, the first check valve 2 and / or the second check valve 4 may be, but are not limited to, needle valves, ball valves or butterfly valves, etc., without specific limitations, as long as they can ensure smooth and precise regulation of fluid flow and isolation.

[0042] Furthermore, a pressure relief valve is installed on the pressure tapping pipe body, located between the first check valve 2 and the second check valve 4. This allows for the pre-release of pressure within the pipe when it is necessary to replace or maintain the pressure measuring instrument 3, drain antifreeze, or change the medium inside the pressure tapping pipe body 1. This effectively prevents liquid splashing or misoperation caused by residual pressure inside the pipe, improving the safety and controllability of the operation process. Simultaneously, the pressure relief valve facilitates the replacement or emptying of the medium inside the pipeline, improving maintenance efficiency and ease of use. In addition, during calibration or pressure testing, if the pressure inside the pipe becomes too high, the pressure relief valve will automatically release the pressure to ensure no accidents occur.

[0043] To ensure that there is no risk of liquid leakage at any connection point, the antifreeze pressure tapping pipe also includes multiple seals. The seals are located at the connection between the first stop valve 2 and the fire water pipe 100, and between the first stop valve 2 and the second pressure tapping pipe body 12; and / or at the connection between the first pressure tapping pipe body 11 and the second stop valve 4, and between the second stop valve 4 and the second pressure tapping pipe body 12; and / or at the connection between the first pressure tapping pipe body 11 and the pressure measuring instrument 3. By setting multiple seals, liquid loss is effectively prevented, which helps to maintain the normal pressure of the device without external interference.

[0044] Optionally, the seal may be a sealing ring, which may be, but is not limited to, made of silicone rubber. Silicone rubber has excellent low-temperature performance, maintaining good elasticity and sealing properties within a temperature range of -50°C to +200°C. It does not easily become brittle at low temperatures and can maintain its flexibility.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A freeze-proof pressure lead, characterized by, The application relates to a freeze-proof pressure pipe. The freeze-proof pressure pipe comprises the following parts: a pressure pipe body (1) which is communicated with a fire water pipe (100) and fixedly connected with the fire water pipe (100), the top end of the pressure pipe body (1) can penetrate through the ground (200), and the pressure pipe body (1) can be filled with antifreeze oil; a first liquid stop valve (2) which is arranged on the pressure pipe body (1) and located below the ground (200) and close to the fire water pipe (100), the first liquid stop valve (2) can selectively adjust the flow or block of water in the fire water pipe (100) and the antifreeze oil in the pressure pipe body (1); 2. The freeze-proof pressure sensing tube according to claim 1, wherein a pressure measuring instrument (3) which is detachably connected with the top end of the pressure pipe body (1) and used for measuring the liquid pressure in the pressure pipe body (1) in real time.

3. The freeze-proof pressure sensing tube according to claim 2, wherein One end of the first liquid stop valve (2) is connected with the bottom end of the pressure pipe body (1), and the other end is connected with the fire water pipe (100).

4. The freeze-proof pressure sensing tube according to claim 1, wherein The first liquid stop valve (2) is detachably connected with the fire water pipe (100) and the pressure pipe body (1) respectively.

5. The freeze-proof pressure sensing tube according to claim 4, wherein The freeze-proof pressure pipe further comprises a second liquid stop valve (4) which is arranged on the pressure pipe body (1) and located above the ground (200) and close to the pressure measuring instrument (3), the second liquid stop valve (4) can selectively adjust the flow or block of the antifreeze oil in the pressure pipe body (1) and the pressure measuring instrument (3).

6. The freeze-proof pressure sensing tube according to claim 5, wherein The pressure pipe body (1) comprises a first pressure pipe body (11) and a second pressure pipe body (12), the pressure measuring instrument (3), the first pressure pipe body (11), the second liquid stop valve (4), the second pressure pipe body (12) and the first liquid stop valve (2) are sequentially screwed.

7. The freeze-proof pressure sensing tube according to claim 6, wherein A pressure relief valve is arranged on the pressure pipe body and located between the first liquid stop valve (2) and the second liquid stop valve (4). The freeze-proof pressure pipe further comprises a plurality of sealing members which are arranged at the connecting positions of the first liquid stop valve (2) and the fire water pipe (100), the first liquid stop valve (2) and the second pressure pipe body (12), the first pressure pipe body (11) and the second liquid stop valve (4), and the second liquid stop valve (4) and the second pressure pipe body (12); and / or The sealing members are arranged at the connecting positions of the first pressure pipe body (11) and the pressure measuring instrument (3).

8. The freeze-proof pressure sensing tube according to claim 7, wherein The sealing members adopt sealing rings.

9. The freeze-proof pressure sensing tube according to claim 5, wherein The first liquid stop valve (2) and / or the second liquid stop valve (4) adopt needle valves.

10. The freeze-proof pressure lead of any of claims 1-9, wherein, The antifreeze oil comprises lubricating oil.

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