CN110514370B

CN110514370B - Tightness detection device

Info

Publication number: CN110514370B
Application number: CN201910825534.0A
Authority: CN
Inventors: 谢飞飞; 李英涛; 范皖元; 郭强强; 张敬东; 梁程; 梁敏臣; 宋长青
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-12-01
Anticipated expiration: 2039-08-30
Also published as: CN110514370A

Abstract

The invention discloses a sealing detection device, which is used for detecting the sealing characteristic of a sealed cavity and comprises a shell, a driving mechanism and a pressure detection device, wherein the shell is provided with an inner cavity which is used for communicating the sealed cavity, the inner cavity is provided with a connecting pipe which is used for forming communication with the sealed cavity, fluid is stored in the inner cavity of the shell, the driving mechanism is arranged on the shell and used for driving the fluid to continuously flow between the inner cavity and the sealed cavity, the pressure detection device is arranged on the connecting pipe and used for detecting the pressure parameter of the fluid flowing through the connecting pipe, the pressure detection device can quickly and accurately judge whether the sealing characteristic of the sealed cavity meets the requirement, and when the driving fluid flows to the inner cavity from the sealed cavity, the fluid for detection can be recovered after the. The fluid can be gas or liquid, and can be filled with gas or liquid matched with the closed cavity for detection, without influencing the composition characteristics of the closed cavity and the equipment thereof.

Description

Tightness detection device

Technical Field

The invention relates to the technical field of sealing characteristic detection, in particular to a sealing performance detection device.

Background

In various existing devices, many of the devices have high requirements on the sealing property of the internal cavity, and how to accurately judge whether the sealing property of the internal cavity meets the design and use requirements needs a corresponding detection tool.

Common sealing characteristic detection methods comprise a foam method or a water immersion method, wherein gas with certain pressure is introduced into a closed cavity, soap foam and the like are adopted to be smeared on corresponding leakage positions, or the equipment to be detected is placed into water, and the dynamic change of the foam or the condition of bubbles in the water is observed, so that the sealing performance of the equipment is judged. However, the detection method is limited to gas seal detection, cannot be used for liquid detection, is low in detection precision, cannot visually observe extremely slight gas leakage, is large in limitation, and is not suitable for water testing of some equipment.

Disclosure of Invention

The invention mainly aims to provide a sealing performance detection device, and aims to solve the problems that the existing equipment sealing characteristic detection method is limited to gas sealing detection, is low in precision and cannot be directly observed.

In order to achieve the above object, the present invention provides a sealing performance detecting apparatus for detecting a sealing characteristic of a sealed cavity, including:

the shell is provided with an inner cavity which is used for communicating the closed cavity, the inner cavity is provided with a connecting pipe which is used for being communicated with the closed cavity, and fluid is stored in the inner cavity of the shell;

the driving mechanism is arranged on the shell and used for driving the fluid to continuously flow between the inner cavity and the closed cavity; and the number of the first and second groups,

and the pressure detection device is arranged on the connecting pipe and used for detecting the pressure parameter of the fluid flowing through the connecting pipe.

Optionally, the housing is disposed to extend in an up-down direction, and the driving mechanism includes:

the piston is movably arranged in the inner cavity along the up-down direction so as to divide the inner cavity into an upper cavity and a lower cavity from top to bottom, the lower cavity is used for storing fluid, and the connecting pipe is communicated with the lower cavity;

the piston rod extends up and down, and the lower end of the piston rod is connected with the piston; and the number of the first and second groups,

the operating part is arranged at the upper end of the piston rod and used for driving the piston rod to move up and down.

Optionally, the operation portion includes:

the middle part of the driving rod is rotatably connected with the upper end of the piston rod; and the number of the first and second groups,

the supporting rod is arranged on the outer wall of the shell in a vertically extending mode, and one end of the driving rod is rotatably connected with the upper end of the supporting rod.

Optionally, the operating portion further includes a grab bar, and the grab bar is protruded from the outer wall of the housing.

Optionally, still include the backward flow branch road, the both ends of backward flow branch road respectively with lower cavity with the connecting pipe forms the intercommunication, be equipped with the storage jar on the backward flow branch road, so that the fluid certainly when airtight cavity backward flows, pass through in proper order the connecting pipe with the storage jar, and flow back extremely in the lower cavity.

Optionally, the return branch comprises a first return pipe section between the lower chamber and the storage tank, and a second return pipe section between the connecting pipe and the storage tank;

the connecting pipe is provided with two connecting ports which are respectively communicated with the lower chamber and the second return pipe section;

the tightness detection device also comprises a first one-way valve, a second one-way valve and a stop valve, wherein the first one-way valve is arranged on the connecting pipe and is positioned between the two connecting ports, the second one-way valve is arranged on the first return pipe section, and the stop valve is arranged on the second return pipe section;

the positive conduction flow direction of the first one-way valve is from the inner cavity to the closed cavity, and the positive conduction flow direction of the second one-way valve is from the storage tank to the inner cavity.

Optionally, the connection end of the first return pipe to the storage tank is disposed near the bottom of the storage tank.

Optionally, the first return pipe section, the second return pipe section, the first connecting pipe section, the second connecting pipe section, and the storage tank are detachably connected to each other through pipe joints.

Optionally, the pressure detection device is a high-precision pressure sensor.

According to the technical scheme, the fluid is stored in the inner cavity of the shell and can be gas or liquid, the driving mechanism can drive the fluid to flow from the inner cavity to the closed cavity and can also drive the fluid to flow from the closed cavity to the inner cavity, when the fluid flows from the inner cavity to the closed cavity, the pressure detection device located on the connecting pipe can detect the pressure parameters of the fluid in real time through the connecting pipe, and the pressure parameters comprise the pressure value of the fluid and the attenuation rate and the attenuation magnitude of the pressure value, so that whether the sealing characteristic of the closed cavity meets the requirement can be judged quickly and accurately.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Shell body	23	Driving rod
11	Lower chamber	24	Support rod
				12	Upper chamber	25	Armrest rod
13	Connecting pipe	31	Storage tank
				131	First connecting pipe section	32	First return pipe section
132	Second connecting pipe section	321	Second return line section
				133	First check valve	33	Second check valve
21	Piston	331	Stop valve
				22	Piston rod	4	Fluid, especially for a motor vehicle

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, an embodiment of a tightness detecting device according to the present invention is disclosed, in which the tightness detecting device is used for detecting a sealing characteristic of a sealed cavity (not shown in the drawings), and includes a housing 1, a driving mechanism and a pressure detecting device (not shown in the drawings), the housing 1 has an inner cavity for communicating with the sealed cavity, the inner cavity is provided with a connecting pipe 13 for forming communication with the sealed cavity, the inner cavity of the housing 1 stores a fluid 4, the driving mechanism is disposed in the housing 1 for driving the fluid 4 to continuously flow between the inner cavity and the sealed cavity, and the pressure detecting device is disposed in the connecting pipe 13 for detecting a pressure parameter of the fluid 4 flowing through the connecting pipe 13.

In this embodiment, the inner chamber of the casing 1 stores fluid 4, the driving mechanism can drive fluid 4 to flow to the sealed cavity from the inner chamber, and also can drive fluid 4 to flow to the inner chamber from the sealed cavity, when fluid 4 flows to the sealed cavity from the inner chamber, through the connecting pipe 13, the pressure detection device located at the connecting pipe 13 can detect the pressure parameter of fluid 4 in real time, specifically, in this embodiment, the pressure detection device is a high-precision pressure sensor, the pressure parameter includes the pressure value of fluid 4, and the attenuation rate and the attenuation magnitude of the pressure value, therefore, whether the sealing characteristic of the sealed cavity meets the requirement can be judged quickly and accurately, when driving fluid 4 flows to the inner chamber from the sealed cavity, fluid 4 for detection can be recovered after detection is finished.

In this embodiment, the fluid 4 may be gas or liquid, and may be filled with gas or liquid matching the sealed cavity for detection, without affecting the composition characteristics of the sealed cavity and the equipment to which the sealed cavity belongs.

Further, the housing 1 is extended in the vertical direction, the driving mechanism includes a piston 21, a piston rod 21 and an operating portion, the piston 21 is movably mounted in the inner cavity in the vertical direction to divide the inner cavity into an upper chamber 12 and a lower chamber 11 from top to bottom, the lower chamber 11 is used for storing the fluid 4, the connecting pipe 13 is communicated with the lower chamber 11, the piston rod 21 is extended in the vertical direction, the lower end of the piston rod 21 is connected with the piston 21, and the operating portion is disposed at the upper end of the piston rod 21 and used for driving the piston rod 21 to move in the vertical direction.

In this embodiment, the housing 1 is extended vertically, the driving mechanism includes the piston 21 and the piston rod 21, the fluid 4 is driven by the vertical movement of the piston 21 in the inner cavity, the structure is simple, the implementation is easy, the manual operation can be realized by the operation part, and the cost is low because the electric device is not needed.

Further, the operation portion includes a driving rod 23 and a supporting rod 24, a middle portion of the driving rod 23 is rotatably connected to an upper end of the piston rod 21, the supporting rod 24 is disposed on an outer wall of the housing 1 to extend in an up-down direction, and one end of the driving rod 23 is rotatably connected to an upper end of the supporting rod 24.

In this embodiment, the operation of moving the piston rod 21 in the up-and-down direction is realized by the lever principle, which is labor-saving.

Further, the operating part also comprises a grab bar 25, the grab bar 25 is arranged on the outer wall of the shell 1 in a protruding mode, when a user manually operates the driving rod 23 with one hand, the other hand can be placed on the grab bar 25, and the operation is more harmonious and labor-saving.

Furthermore, this leakproofness detection device still includes the backward flow branch road, and the both ends of backward flow branch road form the intercommunication with lower chamber 11 and connecting pipe 13 respectively, are equipped with storage jar 31 on the backward flow branch road to when for fluid 4 from the closed cavity backward flow, pass through connecting pipe 13 and storage jar 31 in proper order, and backward flow to in the lower chamber 11

In order to further improve the recovery effect of the fluid 4 in the closed cavity, the tightness detection device further comprises a backflow branch, and when the tightness detection device is used for recovering the fluid 4, the fluid is not directly sucked through the inner cavity of the shell 1, but is sucked through the storage tank 31 in the backflow branch.

Further, the return branch includes a first return pipe section 32 between the lower chamber 11 and the storage tank 31, and a second return pipe section 321 between the connection pipe 13 and the storage tank 31, the connection pipe 13 having two connection ports respectively communicating with the lower chamber 11 and the second return pipe section 321, and at the same time, the connection pipe 13 is divided into a first connection pipe section 131 and a second connection pipe section 132, the sealability detection apparatus further comprises a first check valve 133 and a second check valve 33, the first check valve 133 is provided on the connection pipe 13, and is located between the two connection ports, a second check valve 33 is provided on the first return pipe section 32, the check valve on the first connecting pipe segment 131 is a first check valve 133, the forward conduction direction of which is from the inner cavity to the sealed cavity, and the check valve on the first return pipe segment 32 is a second check valve 33, the forward conduction direction of which is from the storage tank 31 to the inner cavity.

In this embodiment, when the driving mechanism drives the fluid 4 to flow into the sealed cavity, the first one-way valve 133 is in forward conduction, so that the fluid 4 can enter the sealed cavity through the connecting pipe 13, at this time, the stop valve 331 is in a closed state, and cooperates with the second one-way valve 33, the fluid 4 can be prevented from flowing into the storage tank 31 from the lower chamber 11, so that the fluid 4 can enter the closed cavity more intensively, when the driving mechanism drives the fluid 4 to flow back into the lower chamber 11 from the closed cavity, the first check valve 133 can block the fluid 4 from directly flowing back into the lower chamber 11, and at this time, the stop valve 331 is in an open state, and the second check valve 33 is in a forward communication state, so that the fluid 4 enters the storage tank 31 first and then flows back into the lower chamber 11, since the driving mechanism in this embodiment is driven by controlling the up-and-down movement of the piston 21 by the principle of a lever, the efficiency of returning the fluid 4 to the lower chamber 11 can be increased by the above arrangement.

Further, the connection end of the first return pipe to the storage tank 31 is disposed near the bottom of the storage tank 31, so that the inner cavity of the housing 1 can suck more fluid 4 in the storage tank 31.

Further, the first return pipe section 32, the second return pipe section 321, the first connecting pipe section 131 and the storage tank 31 are detachably connected correspondingly through pipe joints, and when the tightness detection device is not used, the tightness detection device can be detached, is convenient to move, carry, clean and the like, and when the tightness detection device is needed, the tightness detection device can be rapidly assembled on site.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A leakproofness detection device for detecting the sealing characteristics of a closed cavity, comprising:

the shell is provided with an inner cavity which is used for communicating the closed cavity, the inner cavity is provided with a connecting pipe which is used for being communicated with the closed cavity, and liquid is stored in the inner cavity of the shell;

the driving mechanism is arranged on the shell and used for driving the liquid to continuously flow between the inner cavity and the closed cavity;

the pressure detection device is arranged on the connecting pipe and used for detecting the pressure parameter of the liquid flowing through the connecting pipe; and the number of the first and second groups,

the two ends of the backflow branch are respectively communicated with the lower cavity and the connecting pipe, and a storage tank is arranged on the backflow branch, so that the liquid flows through the connecting pipe and the storage tank in sequence and flows back into the lower cavity when flowing back from the closed cavity;

the casing is along the setting of extending from top to bottom, actuating mechanism includes:

the piston is movably arranged in the inner cavity along the up-down direction so as to divide the inner cavity into an upper cavity and a lower cavity from top to bottom, the lower cavity is used for storing liquid, and the connecting pipe is communicated with the lower cavity;

2. The sealability detection apparatus of claim 1, wherein the operation portion comprises:

3. The sealability detection apparatus of claim 2, wherein the operating portion further comprises a grab bar protruding from an outer wall of the housing.

4. The leak detection apparatus of claim 1 wherein the return branch comprises a first return pipe segment between the lower chamber and the storage tank, and a second return pipe segment between the connecting pipe and the storage tank;

the connecting pipe is provided with two connecting ports which are respectively communicated with the lower cavity and the second return pipe section, and is divided into a first connecting pipe section and a second connecting pipe section;

5. The leak testing apparatus of claim 4, wherein the connection end of the first return pipe to the storage tank is disposed near the bottom of the storage tank.

6. The leak detection device of claim 4, wherein the first return line segment, the second return line segment, the first connection line segment, the second connection line segment, and the storage tank are detachably connected to each other via pipe joints.

7. The leak detection device according to claim 1, wherein the pressure detection device is a high-precision pressure sensor.