CN218094882U

CN218094882U - Device for preventing liquid pipeline thermal expansion overpressure

Info

Publication number: CN218094882U
Application number: CN202222213173.4U
Authority: CN
Inventors: 钟世福; 肖华送; 王渝; 庞婷
Original assignee: Chengdu General Engineering Technology Co ltd
Current assignee: Chengdu General Engineering Technology Co ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2022-12-20
Anticipated expiration: 2032-08-22

Abstract

The utility model discloses a prevent device of liquid pipeline thermal energy superpressure belongs to chemical production equipment technical field. The utility model discloses a pressure-bearing cavity with the fluid pipeline intercommunication, the inside soft bag that is provided with of pressure-bearing cavity, soft bag one end and fluid pipeline intercommunication, the other end are connected with resetting means. When the environmental temperature rises and the liquid in the pipeline rises due to expansion pressure, the soft bag in the pressure-bearing cavity can change the volume according to the change of the liquid volume, so that the purpose of absorbing the liquid expansion amount is achieved, and the pressure stability of the pipeline is further maintained. When the ambient temperature drops and the liquid volume recovers, the resetting device can compress the soft bag back to press the liquid into the pipeline. The device can solve the problem of thermal expansion of the closed pipeline, avoid liquid loss and reduce the distribution of pipes.

Description

Device for preventing liquid pipeline thermal expansion overpressure

Technical Field

The utility model belongs to the technical field of chemical production equipment, concretely relates to prevent device of liquid pipeline thermal energy superpressure.

Background

Liquid pipelines in a general chemical plant often involve the condition that valves at two ends of the pipelines need to be closed due to operation requirements. Because the valves at two ends of the pipeline are closed, the pipeline forms a closed container, and because the ambient temperature rises (especially in summer), the liquid in the pipeline expands (the density is reduced and the volume is increased), so that a large expansion force is formed, the pipeline and components are damaged, the liquid leaks, and the environment is polluted.

The existing common solution is to arrange a safety valve on the pipeline, but the arrangement of the safety valve needs to be matched with an inlet and outlet pipeline, and particularly needs to lead the toxic and combustible liquid medium to a far safety zone for discharge or local recovery. The tubing makes the working environment unattractive, and the pipeline interweaving is easy to cause personnel injury; if the waste water is discharged on site, the environment is polluted; this is a loss for valuable liquids.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a prevent device of liquid pipeline thermal energy superpressure, its aim at: prevent that liquid inflation leads to pipeline and part to damage, prevent that liquid from leaking the polluted environment and avoiding the loss of precious liquid to cause the loss.

The utility model adopts the technical scheme as follows:

the device for preventing the thermal expansion and overpressure of the liquid pipeline comprises a pressure-bearing cavity communicated with the liquid pipeline, wherein a soft bag is arranged in the pressure-bearing cavity, one end of the soft bag is communicated with the liquid pipeline, and the other end of the soft bag is connected with a resetting device.

After the technical scheme is adopted, when the ambient temperature rises and liquid in the pipeline rises due to expansion pressure, the soft bag in the pressure-bearing cavity can change the volume according to the change of the liquid volume, so that the purpose of absorbing the liquid expansion amount is achieved, and the pressure stability of the pipeline is further maintained. When the ambient temperature drops and the liquid volume recovers, the resetting device can compress the soft bag back to press the liquid into the pipeline. The device can solve the problem of thermal expansion of the closed pipeline, simultaneously avoid liquid loss and reduce the distribution pipes.

Preferably, the resetting device comprises a supporting plate and a spring, the supporting plate is in contact with the soft bag, one end of the spring is connected with the supporting plate, and the other end of the spring is connected with one end, far away from the soft bag, of the pressure-bearing cavity.

After adopting this preferred scheme, the spring can regard as resetting means, simple structure, and the backup pad increases and the area of contact of soft bag, and the atress is more even, prevents that soft bag from damaging.

Preferably, an opening is formed in one end, far away from the liquid pipeline, of the pressure-bearing cavity, a movable rod is arranged on the inner side of the spring, one end of the movable rod is fixedly connected with the supporting plate, and the other end of the movable rod penetrates through the opening and is in sliding connection with the opening.

After adopting this preferred scheme, the movable rod can go on the spring, makes the spring only can compress and extend along the axial of movable rod, increases the stability of device.

Preferably, one end of the movable rod, which is positioned on the outer side of the liquid pipeline, is in threaded connection with a locking nut.

Preferably, one side of the soft bag, which is close to the support plate, is provided with a force transmission plate, one side of the force transmission plate is abutted against the support plate, and the edge of the force transmission plate is in sliding connection with the inner wall of the pressure-bearing cavity.

After adopting this preferred scheme, can further increase the area of contact of soft bag and backup pad through the biography power board, make soft bag atress more even.

Preferably, the shape and size of the force transmission plate are the same as those of the support plate, a boss is arranged on the side wall of the liquid pipeline, and the boss is positioned on the outer side of the soft bag.

After the preferred scheme is adopted, the boss can limit the position of the force transmission plate.

Preferably, the boss is of an annular structure.

Preferably, the pressure-bearing cavity is connected with the liquid pipeline through a flange.

After adopting this preferred scheme, this device is installed the use more easily.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. when the ambient temperature rises and liquid in the pipeline rises due to expansion pressure, the soft bag in the pressure-bearing cavity can change the volume according to the change of the liquid volume, so that the purpose of absorbing the liquid expansion amount is achieved, and the pressure stability of the pipeline is further maintained. When the ambient temperature drops and the liquid volume recovers, the resetting device can compress the soft bag back to press the liquid into the pipeline. The device can solve the problem of thermal expansion of the closed pipeline, avoid liquid loss and reduce the distribution of pipes.

2. The spring can be used as a resetting device, the structure is simple, the contact area between the supporting plate and the soft bag is increased, the stress is more uniform, and the soft bag is prevented from being damaged.

3. The inboard of spring is provided with the movable rod, and the movable rod can go on the spring, makes the spring only can compress and extend along the axial of movable rod, increases the stability of device.

4. The contact area of the soft bag and the supporting plate can be further increased through the force transmission plate, so that the soft bag is stressed more uniformly.

5. The side wall of the liquid pipeline is provided with a boss, and the boss is positioned at the outer side of the soft bag. The boss can limit the position of the pressure plate.

6. This device accessible flange is connected with liquid pipeline, and the installation is used conveniently.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention.

Reference numerals: 1-pressure bearing cavity, 2-boss, 3-soft bag, 4-dowel plate, 5-support plate, 6-spring, 7-movable rod, 8-locking nut, 9-flange, 10-liquid pipeline and 11-cut-off valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

The present invention will be described in detail with reference to fig. 1.

A device for preventing liquid pipeline thermal expansion overpressure, as shown in figure 1, comprises a pressure-bearing cavity 1 communicated with a liquid pipeline 10, a soft bag 3 is arranged inside the pressure-bearing cavity 1, the lower end of the soft bag 3 is communicated with the liquid pipeline 10, and the upper end is connected with a resetting device for enabling the soft bag 3 to recover the original shape.

As shown in fig. 1, the resetting device comprises a supporting plate 5 and a spring 6, the lower end of the supporting plate 5 is in contact with the soft bag 3, the lower end of the spring 6 is fixedly connected with the supporting plate 5, and the upper end of the spring is fixedly connected with one end of the pressure-bearing cavity 1 far away from the soft bag 3.

An opening is formed in one end, far away from the liquid pipeline 10, of the pressure-bearing cavity 1, a movable rod 7 is arranged on the inner side of the spring 6, the lower end of the movable rod 7 is fixedly connected with the supporting plate 5, and the upper end of the movable rod 7 penetrates through the opening and is in sliding connection with the opening.

And one end of the movable rod 7, which is positioned on the outer side of the liquid pipeline 10, is in threaded connection with a locking nut. Through the lock nut, the compression amount of the spring 6 can be adjusted, so that the spring force is set to adapt to pipelines with different design pressures.

One side of the soft bag 3, which is close to the supporting plate 5, is provided with a force transmission plate 4, one side of the force transmission plate 4 is abutted against the supporting plate 5, and the edge of the force transmission plate 4 is in sliding connection with the inner wall of the pressure-bearing cavity 1.

In this embodiment, the shape and size of the force transmission plate 4 are the same as those of the support plate 5, the side wall of the liquid pipeline 10 is provided with a boss 2, and the boss 2 is located outside the soft bag 3.

In this embodiment, the boss 2 is an annular structure, and in another embodiment, it may be a plurality of independent boss structures disposed along the sidewall of the liquid pipe 10. In this embodiment, the cross-sectional shape of the pressure-bearing cavity 1 is circular, and the shapes of the support plate 5 and the force transmission plate 4 are both circular.

In this embodiment, the pressure-bearing cavity 1 is connected with the liquid pipeline 10 through a flange 9. The liquid pipe 10 is provided with a shut-off valve 11.

The working principle of the utility model is as follows:

the soft bag in the pressure-bearing cavity 1 can change the volume according to the change of the liquid volume, so that the purpose of absorbing the liquid expansion amount is achieved, and the pressure stability of the liquid pipeline is further maintained. The upper end of the pressure-bearing cavity 1 is provided with a spring 6 as a driving device, and the lower end of the spring 6 presses the soft bag 3 through a connected supporting plate. When the ambient temperature rises and the liquid in the pipeline rises due to expansion pressure, the supporting plate 5 is pushed upwards, the spring 6 is compressed, the space of the soft bag 3 is enlarged, and the expanded volume is absorbed; when the ambient temperature drops, the spring 6 expands, pressing the support plate 5 downwards, pressing the liquid into the liquid conduit 10. The device can solve the problem of thermal expansion of the closed pipeline, avoid liquid loss and reduce the distribution pipes.

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.

Claims

1. The device for preventing the liquid pipeline from being expanded in heat and generating overpressure is characterized by comprising a pressure-bearing cavity (1) communicated with a liquid pipeline (10), wherein a soft bag (3) is arranged inside the pressure-bearing cavity (1), one end of the soft bag (3) is communicated with the liquid pipeline (10), and the other end of the soft bag is connected with a resetting device.

2. A device for preventing thermal expansion and overpressure in liquid pipelines according to claim 1, characterized in that said return means comprises a support plate (5) and a spring (6), said support plate (5) being in contact with the flexible bladder (3), said spring (6) being connected at one end to the support plate (5) and at the other end to the end of the pressure-containing chamber (1) remote from the flexible bladder (3).

3. A device for preventing thermal expansion and overpressure of liquid pipeline according to claim 2, characterized in that the end of the pressure-bearing chamber (1) far away from the liquid pipeline (10) is provided with an opening, the inner side of the spring (6) is provided with a movable rod (7), one end of the movable rod (7) is fixedly connected with the support plate (5), and the other end passes through the opening and is connected with the opening in sliding mode.

4. A device for preventing thermal expansion and overpressure in liquid pipes according to claim 3, characterized in that the end of the movable rod (7) located outside the liquid pipe (10) is screwed with a lock nut.

5. The device for preventing the thermal expansion and overpressure of the liquid pipeline as claimed in claim 2, characterized in that a force transmission plate (4) is arranged at one side of the soft bag (3) close to the supporting plate (5), one side of the force transmission plate (4) is abutted against the supporting plate (5), and the edge of the force transmission plate (4) is connected with the inner wall of the pressure-bearing cavity (1) in a sliding manner.

6. A device for preventing overpressure due to thermal expansion of liquid conduit according to claim 5, characterized in that said force transfer plate (4) is the same shape and size as the support plate (5), the side wall of said liquid conduit (10) is provided with a boss (2), and said boss (2) is located outside the bladder (3).

7. A device for preventing thermal expansion overpressure in a liquid pipe as claimed in claim 6, characterized in that said boss (2) is of annular configuration.

8. A device for preventing thermal expansion overpressurization of liquid conduits according to claim 1, characterized in that said pressurized chamber (1) is connected to the liquid conduit (10) by means of a flange (9).