Pressure relief device and pipeline system

Abstract

The utility model discloses a pressure relief device and a pipeline system, and belongs to the technical field of fluid control. The pressure relief device comprises a first valve group and a venturi tube, wherein the venturi tube is connected with the first valve group; the second valve group is located on the side, away from the first valve group, of the Venturi tube, and the second valve group is connected with the first valve group through the Venturi tube. The connecting assembly is located between the first valve set and the second valve set and connected with the first valve set and the second valve set. A flowing path of fluid in the pipeline is controlled by controlling opening and closing of the first valve group; by utilizing the special structure of the Venturi tube, namely the two ends are wide and the middle is narrow, negative pressure is formed in a branch where the fourth valve is located, and the negative pressure is accumulated; and when it is monitored that the pressure in the pipeline reaches the relevant on-off operation safety standard, equipment access or disassembly work is started. The pressure relief device can ensure that equipment can be directly connected or dismounted under the condition of continuous supply of a pipeline system, normal operation of the pipeline system is not affected, and the work progress is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of pressure relief device and pipeline system, belong to fluid control technical field. BACKGROUND

[0002] Pipeline connection is a conventional equipment connection mode, in closed and keep fluid continuous circulating flow pipeline, sometimes according to work demand, some pipeline connection equipment needs to be connected or removed, but due to the existence of certain pressure in pipeline, under the condition of continuous supply, continuous pipeline fluid, or no pipeline fluid leakage, directly connecting or removing some pipeline exists certain difficulty.

[0003] In prior art, for the above situation, generally pressure stop supply or supply is disconnected, and then pipeline is connected or removed after fluid in pipeline is unloaded, this mode is time-consuming and laborious, not only affect work progress, but also cause certain waste. It can also be used in series fluid power pumping mode to release or reduce pipeline pressure, so that pipeline pressure reaches relevant on-off operation safety standard, and then pipeline is connected or removed, this mode overcomes the problem of affecting work progress, but increases production cost and energy loss. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of pressure relief device and pipeline system, to solve the problem that pipeline can be connected or removed part pipeline under the condition of closed and keep fluid continuous circulating flow, and not affect work progress, also can reduce production cost.

[0005] Firstly, the utility model provides a kind of pressure relief device, comprising:

[0006] First valve group;

[0007] Venturi tube, the Venturi tube is connected with the first valve group;

[0008] Second valve group, located in the side of the Venturi tube deviating from the first valve group, the second valve group is connected with the first valve group by the Venturi tube;

[0009] Connecting assembly, located between the first valve group and the second valve group, and is connected with the first valve group and the second valve group.

[0010] In an embodiment of the utility model, the first valve group includes first valve, second valve and third valve, the first valve is connected with the third valve in parallel, the second valve is connected with the third valve in series, and the third valve is connected with the Venturi tube.

[0011] In an embodiment of the utility model, the second valve group includes fourth valve, fifth valve and sixth valve, fourth valve with fifth valve and sixth valve are in parallel, fifth valve with sixth valve are in series, sixth valve with venturi pipe is connected.

[0012] In an embodiment of the utility model, one end of fourth valve is connected with venturi pipe, and the other end away from venturi pipe is connected with second valve.

[0013] In an embodiment of the utility model, the connecting assembly includes first connecting piece and second connecting piece, the first connecting piece is communicated with the first valve and the second valve, and the second connecting piece is connected with the fourth valve and the fifth valve.

[0014] In an embodiment of the utility model, it further includes first pipeline and second pipeline, the first pipeline is connected with the first valve and the third valve, and the second pipeline is connected with the sixth valve.

[0015] In an embodiment of the utility model, the valve of the first valve group is a ball valve, and the valve of the second valve group is a check valve. The ball valve has simple structure, small size, small fluid resistance and good sealing performance. Preferably, the valve of the second valve group is a check valve. The check valve belongs to automatic valve, and the opening and closing of the check valve rely on its own weight and medium pressure. The check valve can also block the backflow of medium, and can realize one-way flow control of medium without external power. The check valve has simple structure, high reliability, and is easy to install and maintain.

[0016] In an embodiment of the utility model, the first connecting piece and the second connecting piece are self-closing quick connectors. When two self-closing quick connectors are combined, they can be connected, facilitating fluid circulation. When the two self-closing quick connectors are separated, they will be automatically closed to prevent fluid overflow or leakage.

[0017] In an embodiment of the utility model, it further includes a pressure gauge, and the pressure gauge is connected with the second valve group and the connecting assembly at both ends. The pressure gauge is used for observing the pressure in the pipeline. When the pressure in the pipeline reaches the relevant on-off operation safety standard, the equipment is connected or removed.

[0018] In a second aspect, the utility model provides a pipeline system, which includes the pressure relief device, and further includes equipment, and the equipment is connected with the connecting assembly.

[0019] Advantages

[0020] The pressure relief device comprises a first valve group, a Venturi tube and a second valve group, the flow path of fluid in the pipeline is controlled by controlling the opening and closing of the first valve group, the special structure of the Venturi tube, i.e. the structure features of wide at both ends and narrow in the middle, makes the branch where the fourth valve is located form negative pressure and accumulate negative pressure, when the pressure in the pipeline reaches the relevant on-off operation safety standard, the equipment is connected or removed, the pressure relief device can ensure that the pipeline system can be directly connected or removed without stopping supply, does not affect the normal operation of the pipeline system, and ensures the work progress. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The pressure relief device is provided with a principle diagram.

[0022] In the figure, 1 is a first pipeline, 2 is a first valve group, 21 is a first valve, 22 is a second valve, 23 is a third valve, 3 is a Venturi tube, 4 is a second valve group, 41 is a fourth valve, 42 is a fifth valve, 43 is a sixth valve, 5 is a pressure gauge, 6 is a connecting assembly, 61 is a first connecting piece, 62 is a second connecting piece, 7 is a second pipeline, and 8 is equipment. DETAILED DESCRIPTION

[0023] 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include first and second features direct contact, also can include first and second features is not direct contact but is through additional feature between them contact.

[0026] As Figure 1 shown, the application provides a kind of pressure relief device, which can unload or reduce the pressure in pipeline without supply, without supply or without pipeline fluid, so that the pressure in pipeline reaches relevant on-off operation safety standard, can be directly connected or removed some equipment.The pressure relief device includes first valve group 2, Venturi tube 3 and second valve group 4, first valve group 2 is located in one side of Venturi tube 3, second valve group 4 is located in the side of Venturi tube 3 away from first valve group 2, first valve group 2 is connected with second valve group 4 by Venturi tube 3.First valve group 2 is connected by a plurality of valves in series or parallel, the flow path of liquid is controlled by controlling the opening and closing of valve in pipeline, second valve group 4 is also connected by a plurality of valves in series or parallel, for controlling the flow path of liquid.Venturi tube 3 is the tubular structure of two ends wide, and gradually shrinking to the middle, when fluid flows through Venturi tube 3, due to pipeline first contraction and then gradually expand, the speed of fluid in contraction section will increase, resulting in pressure reduction, and in expansion section, fluid speed slows down, pressure recovers.

[0027] In some embodiments, the side of first valve group 2 away from Venturi tube 3 is connected with first pipeline 1, and first pipeline 1 is used for liquid inlet.The side of second valve group 4 away from Venturi tube 3 is connected with second pipeline 7, and second pipeline 7 is used for liquid return.The pressure relief device is also installed with pressure gauge 5, for observing the pressure in pipeline, when the pressure in pipeline reaches relevant on-off operation safety standard is monitored, start the connection or removal work of equipment.First valve group 2 and second valve group 4 are provided with connecting assembly 6 between them, connecting assembly 6 includes first connecting piece 61 and second connecting piece 62, and connecting assembly 6 is used for connecting equipment 8 needing to be connected or removed.

[0028] Further, in some embodiments, the first valve group 2 comprises a first valve 21, a second valve 22 and a third valve 23, the first valve 21 and the third valve 23 are in parallel, and the second valve 22 and the third valve 23 are in series. The first valve 21 is connected with the first pipeline 1 and the connecting assembly 6 at two ends respectively, the third valve 23 is located between the first pipeline 1 and the Venturi tube 3 and is connected with the first pipeline 1 and the Venturi tube 3, and the second valve 22 is located between the second valve group 4 and the first connecting piece 61 and is connected with the second valve group 4 and the first connecting piece 61 at two ends respectively.

[0029] Further, in some embodiments, the second valve group 4 comprises a fourth valve 41, a fifth valve 42 and a sixth valve 43, the fourth valve 41 and the fifth valve 42 and the sixth valve 43 are in parallel, and the fifth valve 42 and the sixth valve 43 are in series. One end of the fourth valve 41 is connected with the middle position of the Venturi tube 3, the other end of the fourth valve 41 is connected with the second valve 22 and the second connecting piece 62, and the pressure gauge 5 is located between the fourth valve 41 and the second valve 22 and the second connecting piece 62. The fifth valve 42 is located between the second connecting piece 62 and the sixth valve 43 and is connected with the second connecting piece 62 and the sixth valve 43 at two ends respectively. The sixth valve 43 is connected with the Venturi tube 3 and the second pipeline 7 at two ends respectively.

[0030] Preferably, in the present embodiment, the valves in the first valve group 2 are ball valves, which have simple structure, small volume, small fluid resistance and good sealing performance.

[0031] Specifically, in the present embodiment, the valves in the second valve group 4 are one-way valves, which prevent backflow of fluid. Preferably, the valves in the second valve group 4 are check valves, which belong to automatic valves, the opening and closing of the check valves rely on their own weight and medium pressure, and the check valves can also block the backflow of medium, so that the one-way flow control of medium can be realized without external power. The check valves have simple structure, high reliability, and are convenient to install and maintain.

[0032] Optionally, in the present embodiment, the first connecting piece 61 and the second connecting piece 62 in the connecting assembly 6 are self-closing quick couplings, which can be connected to guide the flow of fluid, and can be automatically closed after being separated to prevent fluid from overflowing or leaking.

[0033] In addition, the application further provides a pipeline system comprising the pressure relief device, and in some embodiments, the pipeline system comprises the equipment 8, the first pipeline 1 and the second pipeline 7, the first valve group 2 is connected with the first pipeline 1, the second valve group 4 is connected with the second pipeline 7, the Venturi tube 3 is connected with the first valve group 2 and the second valve group 4, and the connecting assembly 6 is connected with the equipment 8. By controlling the opening and closing of the first valve group 2 and utilizing the special structural performance of the Venturi tube 3, the equipment 8 can be connected to the pipeline system or removed from the pipeline system under the conditions that the pipeline system is continuously supplied, continuously supplied and no pump is connected, so that the work progress is ensured and the waste caused by the leakage of the fluid in the pipeline is avoided.

[0034] The utility model working principle: when needing to connect the equipment 8, the pressure relief device is used to relieve the pressure in the pipeline. Before the equipment 8 is connected, the first valve 21 is closed, and the second valve 22 and the third valve 23 are opened, fluid flows into the device through the first pipeline 1, sequentially flows through the third valve 23, the Venturi tube 3 and the sixth valve 43 and then flows into the second pipeline 7. Since the fifth valve 42 is a one-way valve, the fluid directly flows into the sixth valve 43 after passing through the Venturi tube 3 and does not flow into the branch of the fifth valve 42. When the fluid flows into the Venturi tube 3, the Venturi tube 3 is enabled, a negative pressure is formed at the narrow middle part, and a negative pressure is formed in the pipeline branch of the fourth valve 41. Since the second valve 22 is in an open state, the negative pressure is transmitted to the first connecting piece 61 and the second connecting piece 62 through the pipeline. By observing the reading on the pressure gauge 5, when the negative pressure in the pipeline reaches the relevant on-off standard, the equipment 8 is connected with the first connecting piece 61 and the second connecting piece 62, and is made to be conductive. After the equipment 8 is connected, the second valve 22 and the third valve 23 are closed, and the first valve 21 is opened. The fluid flows into the first pipeline 1, sequentially flows through the first valve 21, the first connecting piece 61, the equipment 8, the second connecting piece 62 and the fifth valve 42, and finally flows into the second pipeline 7 through the sixth valve 43. At this time, the connection and use of the equipment 8 are completed.

[0035] When the device 8 needs to be removed, the operation steps are the same as the above-mentioned access steps, first, the first valve 21 is closed, then the second valve 22 and the third valve 23 are opened, the fluid flows into the device through the first pipeline 1, and then flows through the third valve 23, the Venturi tube 3 and the sixth valve 43 in sequence and then flows into the second pipeline 7. When the fluid flows into the Venturi tube 3, the Venturi tube 3 is enabled, so that the pipeline branch in which the fourth valve 41 is located forms a negative pressure, the negative pressure is transmitted to the first connecting piece 61 and the second connecting piece 62 in sequence through the pipeline, the pressure in the pipeline of the device 8 is removed, and because the pressure in the pipeline of the first connecting piece 61 and the second connecting piece 62 is negative, the fluid in the pipeline cannot leak, thereby avoiding waste. By observing the indication on the pressure gauge 5, when the negative pressure in the pipeline reaches the relevant on-off standard, the device 8 is disconnected at the connection with the first connecting piece 61 and the second connecting piece 62, the removal of the device 8 is completed, and the connection port of the first connecting piece 61 and the second connecting piece 62 is closed. After the device 8 is removed, the third valve 23 is closed, the first valve 21 is opened, the fluid flows into through the first pipeline 1, and then flows through the first valve 21, the second valve 22 and the fifth valve 42 in sequence, and finally flows into the second pipeline 7 through the sixth valve 43, at this time, the removal of the device 8 is completed. The second valve 22 and the third valve 23 can also be directly closed, so that the fluid in the first pipeline 1 directly flows into the second pipeline 7.

[0036] The pressure relief device utilizes the performance of the Venturi tube 3 and is provided with multiple valves, so that the Venturi tube 3 generates a negative pressure in the fluid circulating pipeline and accumulates the negative pressure, in the case that no pump is accessed and the fluid is not leaked, and in the case that the supply is not stopped and the supply is not interrupted, some devices 8 can be directly accessed or removed, not only the problem that the work progress is affected due to the stopped supply or the interrupted supply in the process of removing or accessing the device is solved, but also the waste of fluid is avoided, and the production cost is reduced.

[0037] The technical features of the above-embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above-embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0038] The above-embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, on the premise of not departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

[0039] The principle and implementation mode of the present application are described by using specific embodiments, and the above embodiment is only used for helping to understand the method and core idea of the present application. It should be pointed out that, for ordinary skilled persons in the technical field, without departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A pressure relief device, characterized in that, It comprises: a first valve group (2); a Venturi tube (3) connected with the first valve group (2); a second valve group (4) located on the side of the Venturi tube (3) away from the first valve group (2), connected with the first valve group (2) through the Venturi tube (3); a connecting assembly (6) located between and connected with the first valve group (2) and the second valve group (4).

2. A pressure relief device according to claim 1, wherein The first valve group (2) comprises a first valve (21), a second valve (22) and a third valve (23), the first valve (21) and the third valve (23) are connected in parallel, the second valve (22) and the third valve (23) are connected in series, and the third valve (23) is connected with the Venturi tube (3).

3. A pressure relief device according to claim 2, wherein The second valve group (4) comprises a fourth valve (41), a fifth valve (42) and a sixth valve (43), the fourth valve (41) and the fifth valve (42) and the sixth valve (43) are connected in parallel, the fifth valve (42) and the sixth valve (43) are connected in series, and the sixth valve (43) is connected with the Venturi tube (3).

4. A pressure relief device according to claim 3, wherein One end of the fourth valve (41) is connected with the Venturi tube (3), and the other end away from the Venturi tube (3) is connected with the second valve (22).

5. A pressure relief device according to claim 4, wherein The connecting assembly (6) comprises a first connecting piece (61) and a second connecting piece (62), the first connecting piece (61) is connected with the first valve (21) and the second valve (22), and the second connecting piece (62) is connected with the fourth valve (41) and the fifth valve (42).

6. A pressure relief device according to claim 5, wherein It also comprises a first pipeline (1) connected with the first valve (21) and the third valve (23), and a second pipeline (7) connected with the sixth valve (43).

7. A pressure relief device according to claim 6, wherein The valves of the first valve group (2) are ball valves, and the valves of the second valve group (4) are one-way valves.

8. A pressure relief device according to claim 5, wherein The first connecting piece (61) and the second connecting piece (62) are self-closing quick couplings.

9. A pressure relief device according to claim 1, wherein It also comprises a pressure gauge (5) connected with the second valve group (4) and the connecting assembly (6) at both ends.

10. A plumbing system characterized by, It comprises a pressure relief device according to any one of claims 1-9, and the pipeline system further comprises a device (8) connected with the connecting assembly (6). It comprises a pressure relief device according to any one of claims 1-9, and the pipeline system further comprises a device (8) connected with the connecting assembly (6).

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