Pressure balance system acting on sealing cavity part in high-pressure plastic fuel tank

Abstract

The utility model discloses a pressure balance system acting on a sealing cavity part in a high-pressure plastic fuel tank. The pressure balance system comprises a first pressure detection module, a second pressure detection module and a communicating pipeline. The first pressure detection module is communicated with the interior of the high-pressure plastic fuel tank; the second pressure detection module is communicated with the interior of the sealed cavity part; and the communicating pipeline is connected between the first pressure detection module and the second pressure detection module to form a passage between the interior of the sealed cavity part and the interior of the high-pressure plastic fuel tank. According to the utility model, the interior of the high-pressure plastic fuel tank is communicated with the interior of the sealed cavity piece, so that the high-pressure fuel tank and the cavity piece (liquid accumulation box) are ensured to be in the same pressure environment, and the internal pressure of the sealed cavity piece can be synchronously changed along with the internal pressure of the high-pressure fuel tank; therefore, the situation that the internal pressure is continuously changed in the forming process of the high-pressure plastic fuel tank, so that the internal sealing cavity part is extruded all the time and is prone to damage or extrusion deformation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure plastic fuel tank molding, in particular to a pressure balancing system acting on a sealing cavity part in a high-pressure plastic fuel tank. Background Art

[0002] When a high-pressure plastic fuel tank is manufactured, one or more sealed cavity parts, such as a liquid accumulation box, need to be built in to achieve the high-standard emission function of the high-pressure plastic fuel tank. However, the internal pressure of the high-pressure plastic fuel tank is constantly changing during the molding process, causing the internal sealed cavity parts to be squeezed all the time, which is prone to damage or extrusion deformation. Summary of the invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a pressure balancing system acting on a sealed cavity part in a high-pressure plastic fuel tank, so that the pressure of the sealed cavity part (such as a liquid accumulation box) can continuously change with the internal molding pressure of the high-pressure plastic fuel tank, thereby making the sealed cavity part not subject to pressure compression and remaining intact during the molding process of the plastic high-pressure fuel tank.

[0004] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0005] A pressure balancing system acting on a sealed cavity part in a high-pressure plastic fuel tank, comprising a first pressure detection module for detecting the internal pressure of the high-pressure plastic fuel tank, a second pressure detection module for detecting the internal pressure of the sealed cavity part, and a connecting pipeline;

[0006] The first pressure detection module is in communication with the interior of the high-pressure plastic fuel tank;

[0007] The second pressure detection module is in communication with the interior of the sealed cavity;

[0008] The communication pipeline is connected between the first pressure detection module and the second pressure detection module, and cooperates with the first pressure detection module and the second pressure detection module to form a passage between the inside of the sealed cavity and the inside of the high-pressure plastic fuel tank.

[0009] Further, the first pressure detection module includes a first diameter blow needle, a first pressure gauge, a first normally closed angle seat valve, a first solenoid control valve, a first air source and a first connecting pipeline;

[0010] The first-diameter blow needle, the first pressure gauge, and the first normally closed angle seat valve are sequentially arranged on the first connecting pipeline, and the first-diameter blow needle is located at one end of the first connecting pipeline;

[0011] The first electromagnetic control valve is connected to the first normally closed angle seat valve;

[0012] The first normally closed angle seat valve is connected to a first gas source.

[0013] Further, the second pressure detection module includes a second diameter blow needle, a second pressure gauge, a second normally closed angle seat valve, a second solenoid control valve, and a second connecting pipeline;

[0014] The second diameter blow needle, the second pressure gauge, and the second normally closed angle seat valve are arranged in sequence on the second connecting pipeline, and the second diameter blow needle is located at one end of the second connecting pipeline;

[0015] The second electromagnetic control valve is connected to the second normally closed angle seat valve.

[0016] Furthermore, one end of the communicating pipeline is communicated with the first connecting pipeline section between the first pressure gauge and the first normally closed angle seat valve, and the other end is communicated with the second normally closed angle seat valve.

[0017] Furthermore, the second pressure detection module also includes a second gas source;

[0018] The second gas source is in communication with a second normally closed angle seat valve;

[0019] One end of the communication pipeline away from the first pressure detection module is communicated with the second connection pipeline section between the second normally closed angle seat valve and the second pressure gauge.

[0020] Furthermore, a PLC controller is included, and the PLC controller is electrically connected to the first pressure gauge and the second pressure gauge respectively.

[0021] Furthermore, a display is included, and the display is connected to the PLC controller.

[0022] Compared with the prior art, the principles and advantages of this technical solution are as follows:

[0023] 1. The connecting pipeline is connected between the first pressure detection module and the second pressure detection module, and cooperates with the first pressure detection module and the second pressure detection module to form a passage between the inside of the sealed cavity part and the inside of the high-pressure plastic fuel tank, so that the inside of the high-pressure plastic fuel tank and the inside of the sealed cavity part are in a connected state, thereby ensuring that the high-pressure fuel tank and the cavity part (liquid accumulation box) are in the same pressure environment, and the internal pressure of the sealed cavity part can change synchronously with the internal pressure of the high-pressure fuel tank, thereby avoiding the internal pressure of the high-pressure plastic fuel tank from continuously changing during the molding process, causing the internal sealed cavity part to be squeezed all the time, which is prone to damage or extrusion deformation.

[0024] 2. Both the first pressure detection module and the second pressure detection module are provided with a self-checking function to ensure the patency of the corresponding pipelines and avoid affecting the pressure balance between the inside of the high-pressure plastic fuel tank and the inside of the sealed cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the services required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a pressure balancing system for a sealed cavity part in a high-pressure plastic fuel tank (A is a high-pressure plastic fuel tank, and B is a sealed cavity part) according to Embodiment 1 of the utility model.

[0027] Figure 2 This is a pressure balancing system acting on a sealed cavity part in a high-pressure plastic fuel tank according to the second embodiment of the utility model (A is a high-pressure plastic fuel tank, and B is a sealed cavity part);

[0028] Figure 3 This is a pressure balancing system acting on a sealed cavity part in a high-pressure plastic fuel tank according to a third embodiment of the utility model (A is the high-pressure plastic fuel tank, and B is the sealed cavity part).

[0029] Reference numerals:

[0030] 1-connecting pipeline; 2-first diameter blowing needle; 3-first pressure gauge; 4-first normally closed angle seat valve; 5-first solenoid control valve; 6-first air source; 7-second diameter blowing needle; 8-second pressure gauge; 9-second normally closed angle seat valve; 10-second solenoid control valve; 11-second air source; 12-PLC controller. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with three specific implementations:

[0032] Embodiment 1

[0033] like Figure 1 As shown, the pressure balancing system acting on the sealed cavity part in the high-pressure plastic fuel tank described in this embodiment includes a first pressure detection module for detecting the internal pressure of the high-pressure plastic fuel tank, a second pressure detection module for detecting the internal pressure of the sealed cavity part, and a connecting pipeline 1.

[0034] Among them, the first pressure detection module includes a first diameter blow needle 2, a first pressure gauge 3, a first normally closed angle seat valve 4, a first solenoid control valve 5, a first gas source 6 and a first connecting pipeline; the first diameter blow needle 2, the first pressure gauge 3, and the first normally closed angle seat valve 4 are arranged in sequence on the first connecting pipeline, and the first diameter blow needle 2 is located at one end of the first connecting pipeline; the first solenoid control valve 5 is connected to the first normally closed angle seat valve 4; the first normally closed angle seat valve 4 is connected to the first gas source 6.

[0035] The second pressure detection module includes a second diameter blow needle 7, a second pressure gauge 8, a second normally closed angle seat valve 9, a second solenoid control valve 10, and a second connecting pipeline; the second diameter blow needle 7, the second pressure gauge 8, and the second normally closed angle seat valve 9 are arranged in sequence on the second connecting pipeline, and the second diameter blow needle 7 is located at one end of the second connecting pipeline; the second solenoid control valve 10 is connected to the second normally closed angle seat valve 9.

[0036] One end of the connecting pipeline 1 is connected to the first connecting pipeline section between the first pressure gauge 3 and the first normally closed angle seat valve 4 , and the other end is connected to the second normally closed angle seat valve 9 .

[0037] The working principle of this embodiment is as follows:

[0038] During the molding preparation stage of the sealed cavity part (liquid accumulation box) in the high-pressure plastic fuel tank, the first diameter blow needle 2 is not inserted into the high-pressure plastic fuel tank, the second diameter blow needle 7 is not inserted into the sealed cavity part, and the first normally closed angle seat valve 4 and the second normally closed angle seat valve 9 are both in the normally closed state.

[0039] In the self-checking stage of the pressure balance system, the first normally closed angle seat valve 4 is controlled to be opened by the first electromagnetic control valve 5, and the high-pressure gas in the first gas source 6 enters the first pressure gauge 3 and the connecting pipeline 1 through the first normally closed angle seat valve 4, and then enters the first diameter blowing needle 2. Similarly, the second normally closed angle seat valve 9 is controlled to be opened by the second electromagnetic control valve 10, and the high-pressure gas entering the connecting pipeline 1 enters the second pressure gauge 8 through the second normally closed angle seat valve 9, and then enters the second diameter blowing needle 7. Then, by reading the pressure data of the first pressure gauge 3 and the second pressure gauge 8, it is detected whether the pipeline from the first gas source 6 to the first diameter blowing needle 2 and the pipeline from the first gas source 6 to the second diameter blowing needle 7 are unobstructed. If both pipelines are unobstructed, it directly enters the next stage. Otherwise, the pipeline is repaired and the next stage is entered after the pipeline is unobstructed.

[0040] During the molding stage of the high-pressure plastic fuel tank, the first diameter blow needle 2 and the second diameter blow needle 7 are respectively inserted into the interior of the high-pressure plastic fuel tank and the interior of the sealed cavity part; then, the first normally closed angle seat valve 4 is controlled to be closed by the first electromagnetic control valve 5, and the second normally closed angle seat valve 9 is controlled to be opened by the second electromagnetic control valve 10, so that the passage from the first diameter blow needle 2 to the second diameter blow needle 7 is connected (through the first pressure gauge 3, the connecting pipeline 1, the second normally closed angle seat valve 9, and the second pressure gauge 8 in the middle), so that the interior of the high-pressure plastic fuel tank and the interior of the sealed cavity part are in a connected state, thereby ensuring that the high-pressure fuel tank and the cavity part (liquid accumulation box) are in the same pressure environment, and the internal pressure of the sealed cavity part can change synchronously with the internal pressure of the high-pressure fuel tank.

[0041] In addition, during the molding stage of the high-pressure plastic fuel tank, the pressure of the first connecting pipeline is detected by the first pressure gauge 3, and the internal pressure of the high-pressure plastic fuel tank is also indirectly detected; the pressure of the second connecting pipeline is detected by the second pressure gauge 8, and the internal pressure of the sealed cavity part is also indirectly detected; if the difference between the pressure value detected by the first pressure gauge 3 and the pressure value detected by the second pressure gauge 8 exceeds the specified range, it indicates that the sealed cavity part is damaged and the corresponding high-pressure plastic fuel tank needs to be scrapped. If the difference between the pressure value detected by the first pressure gauge 3 and the pressure value detected by the second pressure gauge 8 is within the specified range, it indicates that the sealed cavity part is intact.

[0042] In this embodiment, the connecting pipe 1 is connected between the first pressure detection module and the second pressure detection module, and cooperates with the first pressure detection module and the second pressure detection module to form a passage between the interior of the sealed cavity part and the interior of the high-pressure plastic fuel tank, so that the interior of the high-pressure plastic fuel tank and the interior of the sealed cavity part are in a connected state, thereby ensuring that the high-pressure fuel tank and the cavity part (liquid accumulation box) are in the same pressure environment, and the internal pressure of the sealed cavity part can change synchronously with the internal pressure of the high-pressure fuel tank, thereby avoiding the internal pressure of the high-pressure plastic fuel tank from continuously changing during the molding process, causing the internal sealed cavity part to be squeezed all the time, which is prone to damage or extrusion deformation.

[0043] The first pressure detection module and the second pressure detection module are both provided with a self-checking function to ensure the patency of the corresponding pipelines and avoid affecting the pressure balance between the inside of the high-pressure plastic fuel tank and the inside of the sealed cavity member.

[0044] Embodiment 2

[0045] Compared with the first embodiment, the second pressure detection module in this embodiment also includes a second gas source 11; the second gas source 11 is connected to the second normally closed angle seat valve 9; the end of the connecting pipeline 1 away from the first pressure detection module is connected to the second connecting pipeline section between the second normally closed angle seat valve 9 and the second pressure gauge 8.

[0046] During the self-check stage of the pressure balance system, the second normally closed angle seat valve 9 is controlled to open by the second electromagnetic control valve 10, and the high-pressure gas in the second gas source 11 enters the second pressure gauge 8 through the second normally closed angle seat valve 9, and then enters the second diameter blowing needle 7.

[0047] By reading the pressure data of the first pressure gauge 3 and the second pressure gauge 8, it is possible to detect whether the pipeline from the first gas source 6 to the first diameter blow needle 2 and the pipeline from the second gas source 11 to the second diameter blow needle 7 are unobstructed. If both pipelines are unobstructed, proceed directly to the next stage; otherwise, repair the pipelines and proceed to the next stage after the pipelines are unobstructed.

[0048] Embodiment 3

[0049] Compared with the first embodiment, this embodiment further includes a PLC controller 12 and a display. The PLC controller 12 is Siemens S7-1200 and is electrically connected to the first pressure gauge 3 and the second pressure gauge 8 respectively.

[0050] In this embodiment, the PLC controller 12 is used to replace manual control pressure detection, which can not only greatly reduce the labor cost but also improve the detection accuracy.

[0051] In addition, the pressure values ​​detected by the first pressure gauge 3 and the second pressure gauge 8 and the difference between the pressure values ​​therebetween can be reflected in the display.

[0052] The embodiments described above are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made based on the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure balancing system acting on a sealed cavity part in a high-pressure plastic fuel tank, characterized in that: It includes a first pressure detection module for detecting the internal pressure of a high-pressure plastic fuel tank, a second pressure detection module for detecting the internal pressure of a sealed cavity, and a connecting pipeline; The first pressure detection module is in communication with the interior of the high-pressure plastic fuel tank; The second pressure detection module is in communication with the interior of the sealed cavity; The communication pipeline is connected between the first pressure detection module and the second pressure detection module, and cooperates with the first pressure detection module and the second pressure detection module to form a passage between the inside of the sealed cavity and the inside of the high-pressure plastic fuel tank.

2. A pressure balancing system acting on a sealed cavity member in a high-pressure plastic fuel tank according to claim 1, characterized in that: The first pressure detection module includes a first diameter blow needle, a first pressure gauge, a first normally closed angle seat valve, a first electromagnetic control valve, a first air source and a first connecting pipeline; The first-diameter blow needle, the first pressure gauge, and the first normally closed angle seat valve are sequentially arranged on the first connecting pipeline, and the first-diameter blow needle is located at one end of the first connecting pipeline; The first electromagnetic control valve is connected to the first normally closed angle seat valve; The first normally closed angle seat valve is connected to a first gas source.

3. A pressure balancing system acting on a sealed cavity member in a high-pressure plastic fuel tank according to claim 2, characterized in that: The second pressure detection module includes a second diameter blow needle, a second pressure gauge, a second normally closed angle seat valve, a second solenoid control valve, and a second connecting pipeline; The second diameter blow needle, the second pressure gauge, and the second normally closed angle seat valve are arranged in sequence on the second connecting pipeline, and the second diameter blow needle is located at one end of the second connecting pipeline; The second electromagnetic control valve is connected to the second normally closed angle seat valve.

4. A pressure balancing system acting on a sealed cavity member in a high-pressure plastic fuel tank according to claim 3, characterized in that: One end of the communication pipeline is communicated with the first connection pipeline section between the first pressure gauge and the first normally closed angle seat valve, and the other end is communicated with the second normally closed angle seat valve.

5. A pressure balancing system acting on a sealed cavity member in a high-pressure plastic fuel tank according to claim 3, characterized in that: The second pressure detection module also includes a second gas source; The second gas source is in communication with a second normally closed angle seat valve; One end of the communication pipeline away from the first pressure detection module is communicated with the second connection pipeline section between the second normally closed angle seat valve and the second pressure gauge.

6. A pressure balancing system acting on a sealed cavity member in a high-pressure plastic fuel tank according to any one of claims 3 to 5, characterized in that: A PLC controller is also included, and the PLC controller is electrically connected to the first pressure gauge and the second pressure gauge respectively.

7. A pressure balancing system acting on a sealed cavity member in a high-pressure plastic fuel tank according to claim 6, characterized in that: The utility model also comprises a display which is connected with the PLC controller.

Images