CN219714679U - Pressure maintaining detection device - Google Patents

Abstract

The utility model provides a pressure maintaining detection device, comprising: a conduit assembly, a pressure control assembly, and a pressure detection assembly; the pipeline assembly comprises a communicating pipe, a first end of the communicating pipe is configured to be communicated with the main air pipe, and a second end of the communicating pipe is configured to be communicated with a brake system of the vehicle; the pressure control assembly comprises a pressure regulating valve and a communication valve, the pressure regulating valve is arranged on the communication pipe and divides the communication pipe into a first pipe section and a second pipe section, the pressure regulating valve is configured to regulate the in-pipe pressure of the second pipe section to a preset pressure threshold, and the communication valve is configured to change the communication state of different positions of the communication pipe; the pressure detection assembly comprises at least two pressure detection units, and the at least two pressure detection units are respectively arranged on the first pipe section and the second pipe section. The utility model provides a pressure maintaining detection device which can intuitively and accurately observe the pressure maintaining condition and improve the production efficiency.

Description

Pressure maintaining detection device

Technical Field

The utility model relates to the field of rail transit, in particular to a pressure maintaining detection device.

Background

The utility model provides an auxiliary assembly behind industrial and mining electric locomotive belongs to track horizontal transportation equipment, and at present, in domestic subway shield construction, bears the transportation task, and under its full load condition, only relies on locomotive braking to accomplish parking braking very hard in safe distance, therefore, all back-adapted vehicles must possess the braking function of requirement.

The brake pipeline of the rear-mounted vehicle must be subjected to pressure maintaining test before delivery, so as to ensure that the whole air brake system has no air leakage point. At present, the method for detecting the air tightness is to smear soapy water to each joint, then connect the main air pipe of the air compressor to the pipeline system of the matched equipment, finally close the valve, if the pressure is reduced and the bubbling phenomenon occurs at the place smeared with the soapy water, the existence of air leakage points is indicated.

However, this method has disadvantages of low production efficiency, and inability to observe the pressure maintaining condition intuitively and accurately.

Disclosure of Invention

The embodiment of the utility model provides a pressure maintaining detection device which can intuitively and accurately observe the pressure maintaining condition and improve the production efficiency.

The utility model provides a pressure maintaining detection device, which comprises: a conduit assembly, a pressure control assembly, and a pressure detection assembly; the pipeline assembly comprises a communicating pipe, a first end of the communicating pipe is configured to be communicated with the main air pipe, and a second end of the communicating pipe is configured to be communicated with a brake system of the vehicle; the pressure control assembly comprises a pressure regulating valve and a communication valve, the pressure regulating valve is arranged on the communication pipe and divides the communication pipe into a first pipe section and a second pipe section, the pressure regulating valve is configured to regulate the in-pipe pressure of the second pipe section to a preset pressure threshold, and the communication valve is configured to change the communication state of different positions of the communication pipe; the pressure detection assembly comprises at least two pressure detection units which are respectively arranged on the first pipe section and the second pipe section so as to detect the pressure in the first pipe section and the second pipe section.

As with the pressure maintaining detecting device described above, optionally, the pressure detecting assembly includes a first pressure detecting unit and a second pressure detecting unit; the first pressure detection unit is arranged on the first pipe section to detect the pressure in the pipe of the first pipe section; the second pressure detection unit is arranged on the second pipe section to detect the pressure in the pipe of the second pipe section.

The pressure maintaining detection device as described above, optionally, the pressure detection assembly further includes a third pressure detection unit, where the third pressure detection unit is connected to the pressure regulating valve, and is configured to detect a preset pressure threshold corresponding to the pressure regulating valve.

As in the above pressure maintaining detection device, optionally, the pressure detection unit is a pressure gauge.

As described above, the communication valve may include a first communication valve, a second communication valve, and a third communication valve; the first communication valve is arranged at the first end of the communicating pipe, the second communication valve is arranged at the second end of the communicating pipe, and the third communication valve is arranged between the pressure regulating valve and the second pressure detecting unit.

As mentioned above, the communication valves are ball valves, optionally.

The pressure maintaining detecting device as described above, optionally, the preset pressure threshold of the pressure regulating valve is matched with the operating pressure of the brake system of the vehicle.

As mentioned above, optionally, the pressure-maintaining detecting device further includes a case body having a receiving cavity, and the communicating tube is disposed in the receiving cavity and connected to an inner wall of the case body.

As described above, optionally, the case has an operation panel having a plurality of mounting holes, the pressure detecting units are disposed in the mounting holes in one-to-one correspondence, and the display surface of the pressure detecting unit is exposed to the outside of the operation panel.

In the above pressure-maintaining detecting device, the side of the case may be provided with an openable and closable operation door.

The utility model provides a pressure maintaining detection device, which comprises: a conduit assembly, a pressure control assembly, and a pressure detection assembly; the pipeline assembly comprises a communicating pipe, a first end of the communicating pipe is configured to be communicated with the main air pipe, and a second end of the communicating pipe is configured to be communicated with a brake system of the vehicle; the pressure control assembly comprises a pressure regulating valve and a communication valve, the pressure regulating valve is arranged on the communication pipe and divides the communication pipe into a first pipe section and a second pipe section, the pressure regulating valve is configured to regulate the in-pipe pressure of the second pipe section to a preset pressure threshold, and the communication valve is configured to change the communication state of different positions of the communication pipe; the pressure detection assembly comprises at least two pressure detection units which are respectively arranged on the first pipe section and the second pipe section so as to detect the pressure in the first pipe section and the second pipe section. Therefore, whether the pressure value of the pressure detection unit is reduced beyond the allowable range is observed to judge whether the air leakage phenomenon occurs in the brake system pipeline, and compared with the detection mode of detecting bubbles by smearing soapy water in the traditional method, the pressure maintaining condition can be observed more intuitively and accurately, and the production efficiency is improved.

The construction of a pressure maintaining detecting device according to the present utility model, as well as other objects and advantages thereof, will be more apparent from the description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a pressure maintaining detection device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another pressure maintaining detection device according to an embodiment of the present utility model;

fig. 3 is a front view of a casing in a pressure maintaining detecting device according to an embodiment of the present utility model;

fig. 4 is a top view of a box in a pressure maintaining detection device according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of gas flow direction of a pressure maintaining detection device when a main air pipe is connected;

FIG. 6 is a schematic diagram illustrating a gas flow direction of a pressure maintaining detecting device when a pressure regulating valve is regulated according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of gas flow direction of a pressure maintaining detection device when a brake system pipeline is connected;

fig. 8 is a schematic diagram of gas flow direction of the pressure maintaining detection device in the pressure maintaining stage according to the embodiment of the present utility model.

Reference numerals illustrate:

100-pressure maintaining detection device;

10-a pipe assembly; 11-a first pipe section; 12-a second pipe section;

200-a box body;

20-a pressure control assembly; 21-a first communication valve; 22-a pressure regulating valve; 23-a third communication valve; 24-a second communication valve;

30-a pressure detection assembly; 31-a first pressure detection unit; 32-a third pressure detection unit; 33-a second pressure detection unit;

40-handle;

50-an operation panel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

At present, in the domestic subway shield construction, the rear-mounted vehicles of the industrial and mining electric locomotive bear the transportation task, and under the condition of full load, parking braking is difficult to complete within a safe distance only by locomotive braking, so that all the rear-mounted vehicles are required to have the braking function. The brake pipeline of the rear-mounted vehicle must be subjected to pressure maintaining test before delivery, so as to ensure that the whole air brake system has no air leakage point. At present, the method for detecting the air tightness is to smear soapy water to each joint, then connect the main air pipe of the air compressor to the pipeline system of the matched equipment, finally close the valve, if the pressure is reduced and the bubbling phenomenon occurs at the place smeared with the soapy water, the existence of air leakage points is indicated.

However, although the prior art meets the technical requirement of detecting the air leakage point, the method has the defects of low production efficiency and incapability of intuitively and accurately observing the pressure maintaining condition.

Therefore, the utility model provides a pressure maintaining detection device, which is characterized in that the total air duct pressure is regulated to be the actual pressure of the brake system pipeline pressure maintaining test through regulating a pressure regulating valve, and the pressure values of pipelines in different states are displayed on each pressure detection unit through controlling a communication valve, so that the requirements of lumped wind pressure display, brake system pipeline detection rated wind pressure display and brake system pipeline actual wind pressure display on the same control panel are met. Therefore, whether the pressure value of the pressure detection unit is reduced beyond the allowable range is observed to judge whether the air leakage phenomenon occurs in the brake system pipeline, and compared with the detection mode of detecting bubbles by smearing soapy water in the traditional method, the method is beneficial to improving the production efficiency and can observe the pressure maintaining condition more intuitively and accurately.

A pressure maintaining detecting device in this embodiment is further described below.

Fig. 1 is a schematic diagram of a pressure maintaining detection device according to an embodiment of the present utility model, and fig. 2 is a schematic diagram of another pressure maintaining detection device according to an embodiment of the present utility model.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a pressure maintaining detecting device. As can be seen from fig. 1 and 2, the dwell pressure apparatus 100 includes a piping assembly 10, a pressure control assembly 20, and a pressure detection assembly 30. The pipeline assembly comprises a communicating pipe, a first end of the communicating pipe is configured to be communicated with the main air pipe, and a second end of the communicating pipe is configured to be communicated with a brake system of the vehicle; the pressure control assembly 20 includes a pressure regulating valve 22 and a communication valve, the pressure regulating valve 22 being disposed on the communication pipe and dividing the communication pipe into a first pipe section 11 and a second pipe section 12, the pressure regulating valve 22 being configured to regulate an in-pipe pressure of the second pipe section to a preset pressure threshold value, the communication valve being configured to change a communication state of different positions of the communication pipe;

the pressure detecting assembly 30 includes at least two pressure detecting units provided to the first pipe section 11 and the second pipe section 12, respectively, to detect the in-pipe pressures of the first pipe section and the second pipe section.

Therefore, the total wind pressure display, the rated wind pressure display detected by the rear matched braking system and the actual wind pressure display of the rear matched braking pipeline are displayed on the same control panel, whether the air leakage phenomenon occurs in the braking system pipeline is judged by observing whether the pressure value of the pressure detection unit is reduced beyond the allowable range, and compared with the traditional detection method, the method has the advantages that the pressure maintaining condition can be observed more intuitively and accurately by smearing the soapy water to detect the air bubbles, and the production efficiency is improved.

Specifically, the duct assembly 10 may include a communication pipe, wherein the communication pipe is divided into two ends, and the first end communicates with a main duct (not shown) for accessing the total wind pressure. The second end is in communication with a brake system (not shown) of the vehicle for accessing wind pressure to the brake system of the vehicle during the dwell test.

In some embodiments, the communicating tube may be made of stainless steel, and consists of at least 7 short tubes, and each tube has external threads on both ends thereof for connecting with the pressure control assembly 20 and the joint of the pressure detection unit 30.

The pressure control assembly 20 may include a pressure regulating valve 22 and communication valves, specifically, a first communication valve 21, a third communication valve 23, and a second communication valve 24. Wherein, as an alternative embodiment, the pressure regulating valve 22 divides the communicating pipe into the first pipe section 11 and the second pipe section 12, the pressure regulating valve 22 is arranged between the first pressure detecting unit 31 and the third communicating valve 23, and the air flow at the outlet of the pressure regulating valve 22 can be changed by adjusting the pressure regulating valve 22, so as to adjust the in-pipe pressure of the second pipe section 12 to the rated air pressure of the vehicle braking system during the pressure maintaining test.

In some embodiments, the first communication valve 21 to the second communication valve 24 are all ball valves, and the number of ball valves in this embodiment is 3. The first communication valve 21 is disposed at a first end of the communication pipe, and is used for controlling a communication state of wind pressure at the position of the first pipe section 11; the second communication valve 24 is disposed at the second end of the communication pipe, and is used for controlling the communication state of the position wind pressure of the vehicle brake system; the third communication valve 23 is provided between the pressure regulating valve 22 and the second pressure detecting unit 33 to control the communication state of the wind pressure at the position of the second pipe section 12.

In actual operation, the handle can be turned by 90 degrees to complete the full-open or full-close action, and the quick opening and closing can be realized. When the handle of the ball valve is parallel to the communicating pipe, the valve is in an open state; when the handle of the ball valve is vertical to the communicating pipe, the valve is in a closed state.

In some alternative embodiments, the pressure sensing assembly 30 may include at least two pressure sensing cells. The first pressure detecting unit 31 is disposed at the first pipe section 11 and is used for detecting the in-pipe pressure of the first pipe section 11; the second pressure detecting unit 33 is disposed at the second pipe section 12 for detecting the in-pipe pressure of the second pipe section 12. The pressure detection assembly 30 may further include a third pressure detection unit 32, where the third pressure detection unit 32 communicates with the pressure regulating valve 22 for detecting a preset pressure threshold corresponding to the pressure regulating valve.

In some embodiments, the pressure detecting unit is a pressure gauge, and the pressure gauge has a plurality of types, and in this embodiment, a general pointer indication type is adopted, and the housing of the pressure gauge is a transparent plastic housing. In order to ensure that the elastic element of the pressure gauge can reliably work within the safety range of elastic deformation, the upper limit value of the pressure gauge should be higher than the maximum pressure value possible in actual detection when the measuring range of the pressure gauge is selected, and the maximum working pressure should not exceed 2/3 of the upper limit value in measurement of the stable pressure.

In some embodiments, the preset pressure threshold of the pressure regulating valve is matched with the working pressure of the braking system of the vehicle, and the rated pressure of the pressure maintaining of the braking system is known and can be detected without a pressure detection unit, so the number of the pressure detection units can be 2 or 3.

The pressure sensing assembly 30 connects it to the pipe and the tank 200 via an air pipe. As an alternative embodiment, the case 200 has an operation panel 50, as shown in fig. 4, at least 2 mounting holes are formed in the operation panel 50, and a circular clamping groove is formed at each mounting hole for fixing the pressure detecting units, and the pressure detecting units are disposed in the mounting holes in a one-to-one correspondence. The display surface of the pressure detection unit is exposed to the outer side of the operation panel, so that the manual observation is facilitated, and the pressure maintaining state can be observed more intuitively.

In some embodiments, there are at least 2 connectors on the ductwork. Both ends and the head of the joint are provided with internal threads which are connected with external threads of the pipeline, so that the connection is firmer, and no air leakage phenomenon occurs during the pressure-keeping test. Specifically, a sealing material is also arranged at the joint of the joint and the pipeline, and the sealing material can be a sealing ring, a sealing adhesive tape and the like.

In the above-mentioned joint structure, the both ends that connect link to each other with two different pipelines respectively for the gas in the transmission different pipelines, the head and the bolt of joint link to each other, and it should be noted that, here indicates that the inside hollow structure that is of bolt for the inside wind pressure transmission of pipeline is to the inside of trachea.

It should be noted that, the pressure maintaining detection device 100 further includes a box 200, and as shown in fig. 3, the structure of the box 200 is composed of an operation panel 50, surrounding panels and side doors. The surrounding boards are fixed together in a welding manner, and as an alternative implementation manner, the side of the box 200 is provided with an openable operation door, so that the detection device can be protected from being damaged, and the side door is provided with a handle 40, so that the detection device is convenient to open or close manually.

In some specific embodiments, referring to fig. 3, the case 200 has a receiving chamber, the communication pipe is disposed in the receiving chamber, and both sides of the case 200 are opened with inner holes to pass through the communication pipe, so that the communication pipe is connected with the inner wall of the case 200. It should be noted that, the pipeline of the connection end with the vehicle braking system can be fixed in the box body in an arc-shaped buckle mode.

Referring to fig. 3, the supporting members of the case 200 are four wheels, and are uniformly arranged thereunder. Specifically, the wheels of the box 200 are respectively provided with a buckle, when in testing, the buckles can be pulled down, the wheels are in a locking state, the box is prevented from moving in the detection, after the operation process is finished, the buckles are pulled up, the wheels are in a free moving state, and the box 200 can be conveniently moved.

One side of the box body 200 is provided with a horizontally placed railing which can be connected to the box body 200 in a welding mode and the like, so that the design is beneficial to manually pushing the box body 200, the carrying of the pressure maintaining detection device is convenient, and the device has the advantages of time and labor saving.

It should be noted that, the rated wind pressure during the pressure maintaining of the brake system is a fixed value, and the total wind pressure can be adjusted to the rated wind pressure required for the pressure maintaining by adjusting the pressure regulating valve 22 during the pressure maintaining, so that it is not necessary to provide the third pressure detecting unit 32 at the pipe controlled by the pressure regulating valve 22.

In this embodiment, these two cases are described separately. Taking the pressure maintaining detecting device 100 with the third pressure detecting unit 32 as an example, the working process of the pressure maintaining detecting device 100 and the flow direction distribution situation of the gas in the pipeline during the working in the present utility model will be described as follows: as shown in fig. 1, a main air pipe (not shown) is connected to the first communication valve 21, and at this time, the distribution of the air in the pipeline is shown in fig. 5. Then, the pressure regulating valve 22 is adjusted to make the pressure value be the rated wind pressure required by the pressure maintaining of the braking system, and at this time, the distribution condition of the gas in the pipeline is shown in fig. 6. With the third communication valve 23 closed, a brake system line (not shown) is connected to the second communication valve 24. After that, the third communication valve 23 is opened and the second communication valve 24 is opened, and at this time, the distribution of the gas in the pipe is as shown in fig. 7. When waiting for a moment until the pressure values of the third pressure detecting unit 32 and the second pressure detecting unit 33 are consistent, the third communication valve 23 is closed, the system pipeline starts to enter a pressure maintaining state, at this time, the distribution condition of the gas in the pipeline is as shown in fig. 8, the pressure value detected by the third pressure detecting unit 32 is the pressure maintaining rated wind pressure of the brake system pipeline, the pressure value detected by the second pressure detecting unit 33 is the actual working wind pressure of the brake system pipeline, after 10 minutes, the pressure values of the second pressure detecting unit 33 and the third pressure detecting unit 32 are observed, if the value of the second pressure detecting unit 33 falls beyond the allowable range, the existence of the air leakage point of the system pipeline is proved, and the air leakage point can be queried and processed.

Note that, when the total air duct is connected to the first communication valve 21, the pressure value of the total air duct need not be paid attention to.

The pressure regulating valve 22 is adjusted to have a pressure value equal to a rated air pressure required for maintaining the pressure of the brake system, and the pressure regulating valve 22 described herein refers to a lower end of the pressure regulating valve 22 that rotates counterclockwise or clockwise.

When the pressure regulating valve 22 is adjusted to have a pressure value equal to the rated wind pressure required for maintaining the pressure of the brake system, the pressure regulating valve 22 should be opened when the first communication valve 21 is opened, so that the downstream pipeline is aerated, and the pressure regulating valve 22 is prevented from being started when the downstream pipeline is aerated, and other parts of the pressure regulating valve 22 are damaged due to an excessive air pressure difference.

When the air pressure in the downstream line of the pressure regulator 22 is stable, that is, when the display values of the first pressure detecting means 31 and the third pressure detecting means 32 match, the pressure regulator 22 is further adjusted.

In the case of adjusting the pressure regulating valve 22, the states of the second communication valve 24 and the third communication valve 23 are not particularly required. When the brake system line is connected to the second communication valve 24, the second line 12 is ensured to be in a windless state. At this time, the third communication valve 23 should be closed, and the states of the first communication valve 21 and the third communication valve 23 need not be noted.

After the brake system pipe is connected, the opening order of the third communication valve 23 and the second communication valve 24 is not limited.

It should be noted that, in the pressure maintaining stage of the brake system pipe, the second pressure detecting unit 33 and the third pressure detecting unit 32 are observed to be consistent in pressure value after 10 minutes, and the 10 minutes described herein are approximate values and are not fixed values, and in the actual detection process, the specific time is based on the time when the actually observed pressure value of the third pressure detecting unit 32 and the second pressure detecting unit 33 are consistent.

When the value of the second pressure detecting unit 33 falls beyond the allowable range, it is proved that the air leakage point exists in the brake system pipeline, and the air leakage point can be queried and processed, wherein the falling beyond the allowable range is based on the actual production process specification.

After the test, the first communication valve 21 was closed, and then the pressure regulating valve 22 was closed.

Taking the pressure maintaining detecting device 100 that does not include the third pressure detecting unit 32 as an example, the operation of the pressure maintaining detecting device 100 will be described as follows: in another embodiment, as shown in fig. 2, the pressure regulating valve 22 can independently regulate the pressure value to a preset value, without providing an additional pressure detecting device for detection or observation; accordingly, only the first pressure detecting unit 31 and the second pressure detecting unit 33 are included in the pressure detecting unit assembly of the pressure maintaining detecting device 100, and the third pressure detecting unit 32 is not included.

In another embodiment, the pressure maintaining detecting device 100 specifically includes a pipe assembly 10, a pressure control assembly 20, and a pressure detecting assembly 30; the pipeline assembly comprises a communicating pipe, a first end of the communicating pipe is configured to be communicated with the main air pipe, and a second end of the communicating pipe is configured to be communicated with a brake system of the vehicle; the pressure detection assembly 30 includes a pressure regulating valve 22 and a communication valve, the pressure regulating valve 22 being disposed on the communication pipe and dividing the communication pipe into a first pipe section and a second pipe section, the pressure regulating valve 22 being configured to regulate an in-pipe pressure of the second pipe section to a preset pressure threshold value, the communication valve being configured to change a communication state of different positions of the communication pipe; the pressure detecting assembly 30 includes two pressure detecting units respectively provided to the first pipe section and the second pipe section to detect in-pipe pressures of the first pipe section and the second pipe section.

Specifically, in another embodiment, the main air pipe is connected to the first communication valve 21; then, the pressure regulating valve 22 is regulated to enable the pressure value to be the rated wind pressure required by the pressure maintaining of the braking system; under the condition of ensuring that the third communication valve 23 is closed, connecting a brake system pipeline into the second communication valve 24, opening the third communication valve 23 after connecting, and opening the second communication valve 24; when waiting for a moment until the pressure value displayed by the second pressure detecting unit 33 is the rated pressure for maintaining the pressure of the braking system, closing the third communication valve 23; at this time, the system pipeline starts to maintain pressure, after 10 minutes, the pressure value of the second pressure detection unit 33 is observed, if the value of the second pressure detection unit 33 falls beyond the allowable range, it is proved that the system pipeline has an air leakage point, and the air leakage point can be queried and processed.

Before the detection, the tightness of the pipe should be checked to ensure that the pipe between the regulator valve 22 and the third communication valve 23 is free from air leakage, so as to prevent the pressure value of the second pressure detecting unit 33 from being lower than the rated pressure for maintaining pressure due to the poor tightness of the pipe, not an error caused by air leakage of the brake system.

It should be noted that, compared with the detection device with the third pressure detection unit 32, the detection device reduces detection elements, shortens detection steps, effectively reduces production cost, and greatly improves production efficiency.

In the present embodiment, the pressure maintaining detecting device 100 specifically includes a pipe assembly 10, a pressure control assembly 20, and a pressure detecting assembly 30; the duct assembly 10 includes a communication pipe having a first end configured to communicate with a main air pipe and a second end configured to communicate with a brake system of a vehicle; the pressure control assembly 20 includes a pressure regulating valve 22 and a communication valve, the pressure regulating valve 22 being disposed on the communication pipe and dividing the communication pipe into a first pipe section and a second pipe section, the pressure regulating valve 22 being configured to regulate an in-pipe pressure of the second pipe section to a preset pressure threshold value, the communication valve being configured to change a communication state of different positions of the communication pipe; the pressure detecting assembly 30 includes at least two pressure detecting units respectively provided to the first pipe section and the second pipe section to detect in-pipe pressures of the first pipe section and the second pipe section. Therefore, the total wind pressure display, the rated wind pressure display detected by the rear matched braking system and the actual wind pressure display of the rear matched braking pipeline are displayed on the same control panel, the pressure maintaining test is performed more intuitively and accurately, and the production efficiency is improved.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Generally, terms should be understood at least in part by use in the context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, at least in part depending on the context. Similarly, terms such as "a" and "an" may also be understood to convey a singular usage or a plural usage, depending at least in part on the context.

It should be readily understood that the terms "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest sense such that "on … …" means not only "directly on something", but also includes "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning "on something" or "above" but also the meaning "above something" or "above" without intermediate features or layers therebetween (i.e., directly on something).

Further, spatially relative terms, such as "below," "beneath," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein interpreted accordingly.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The pressure maintaining detection device is characterized by comprising a pipeline assembly, a pressure control assembly and a pressure detection assembly; the pipe assembly includes a communication pipe having a first end configured to communicate with a main air pipe and a second end configured to communicate with a brake system of a vehicle; the pressure control assembly comprises a pressure regulating valve and a communication valve, the pressure regulating valve is arranged on the communication pipe and divides the communication pipe into a first pipe section and a second pipe section, the pressure regulating valve is configured to regulate the in-pipe pressure of the second pipe section to a preset pressure threshold value, and the communication valve is configured to change the communication state of different positions of the communication pipe;

the pressure detection assembly comprises at least two pressure detection units, wherein the at least two pressure detection units are respectively arranged on the first pipe section and the second pipe section so as to detect the pressure in the first pipe section and the second pipe section.

2. The pressure maintaining detecting apparatus according to claim 1, wherein the pressure detecting assembly includes a first pressure detecting unit and a second pressure detecting unit;

the first pressure detection unit is arranged on the first pipe section to detect the pressure in the pipe of the first pipe section;

the second pressure detection unit is arranged on the second pipe section to detect the pressure in the pipe of the second pipe section.

3. The pressure maintaining detection apparatus according to claim 2, wherein the pressure detection assembly further comprises a third pressure detection unit, the third pressure detection unit being in communication with the pressure regulating valve for detecting a preset pressure threshold value corresponding to the pressure regulating valve.

4. A dwell pressure detection device according to claim 3, wherein the pressure detection unit is a pressure gauge.

5. The pressure-maintaining detecting device according to any one of claims 2 to 4, wherein the communication valves include a first communication valve, a second communication valve, and a third communication valve;

the first communication valve is arranged at the first end of the communicating pipe, the second communication valve is arranged at the second end of the communicating pipe, and the third communication valve is arranged between the pressure regulating valve and the second pressure detecting unit.

6. The pressure maintaining detecting apparatus according to claim 5, wherein the communication valves are ball valves.

7. The pressure maintaining detecting apparatus according to any one of claims 1 to 4, wherein a preset pressure threshold of the pressure regulating valve is matched with an operating pressure of a brake system of the vehicle.

8. The pressure-maintaining detecting apparatus according to any one of claims 1 to 4, further comprising a housing having a housing chamber, wherein the communicating pipe is provided in the housing chamber and is connected to an inner wall of the housing.

9. The pressure-maintaining detecting device according to claim 8, wherein the case has an operation panel having a plurality of mounting holes, the pressure detecting units are disposed in the mounting holes in one-to-one correspondence, and a display surface of the pressure detecting unit is exposed to an outside of the operation panel.

10. The pressure maintaining detecting apparatus according to claim 8, wherein the side of the tank has an openable and closable operation door.