CN210442066U

CN210442066U - Liquid container detection device

Info

Publication number: CN210442066U
Application number: CN201921421322.8U
Authority: CN
Inventors: 杨迪; 杨维合
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-05-01
Anticipated expiration: 2029-08-29

Abstract

The utility model relates to a liquid container detection device, it includes the frame, is equipped with the detection storehouse body in the frame, is equipped with drive chamber and piston chamber forward from the back in the detection storehouse body, is equipped with the piston in the piston chamber, is equipped with the piston rod that the rear portion is located the drive chamber on the piston, be equipped with the power device who orders about the piston rod and move forward in the frame, the front end that detects the storehouse body is equipped with the three-way valve with piston chamber intercommunication, is equipped with the valve on two other ports of three-way valve respectively, the rear portion of piston rod is connected with the overhanging end of test bar and stretches out outside the detection storehouse body, is equipped with the slide that supplies the test bar to slide around the detection storehouse body, is connected with the linear displacement detection device who is used for measuring the test bar distance of sliding around on the outer wall. The utility model has the advantages of simple structure, convenient use and accurate and reliable detection result.

Description

Liquid container detection device

Technical Field

The utility model relates to a liquid container detection device that liquid container's pressure was sealed down and is detected.

Background

For the detection of the sealing performance of the liquid container, a method which is commonly used in the past is to keep the liquid container for a certain time under a certain pressure and then test the reduction of the pressure, so as to express the sealing performance of the container, which is commonly called as a pressure drop test method and has the test unit of KPa. Because the sealing performance of different liquid containers cannot be accurately measured by the pressure drop method, the pressure drop is equal for different containers, and the sealing performance of different containers cannot be indicated to be the same. At present, there is a way to express the sealing performance of a container by the leakage amount, which requires that the sealed container is kept under a certain pressure for a certain time, and the leakage amount is tested, and the test unit is ml. Based on the principle, the utility model discloses a liquid container detection device has been developed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a simple structure, accurate reliable liquid container detection device of testing result.

In order to solve the technical problem, the utility model discloses liquid container detection device includes the frame, and its structural feature is: a detection bin body is arranged on a rack, a driving cavity and a piston cavity are arranged in the detection bin body from back to front, a piston is arranged in the piston cavity, a piston rod with the rear part positioned in the driving cavity is arranged on the piston, a power device for driving the piston rod to move back and forth is arranged on the rack, a pressure gauge communicated with the piston cavity is connected on the detection bin body, a three-way valve which is communicated with the piston cavity and has set pressure performance is arranged at the front end of the detection bin body, valves are respectively arranged on pipelines of the other two ports of the three-way valve, two pipeline ports can be respectively connected with a liquid inlet pipeline and a container to be detected, a detection rod which extends out in the radial direction is connected at the rear part of the piston rod, the extending end of the detection rod extends out of the detection bin body, a slide way for the detection rod to slide back, and a supporting device which is used for supporting the piston rod and preventing the piston rod from rotating and swinging is arranged in the driving cavity.

The supporting device comprises at least two sliding rails which are connected to the wall of the driving cavity and distributed along the driving cavity in a surrounding mode, and a sliding block which is matched with the sliding rails and can slide along the sliding rails is installed on the piston rod in a surrounding mode.

The piston is provided with at least two annular grooves which are arranged at intervals, an O-shaped sealing ring is arranged in the annular groove at the front side, and a lip-ear type sealing ring is arranged in the annular groove at the rear side. The lip ear type sealing ring comprises an annular sealing ring body, and a convex lip which protrudes forwards and is annularly arranged along the outer circumference is arranged on the outer circumference of the sealing ring body.

An exhaust pipe communicated with the piston cavity is arranged on the detection bin body, an exhaust valve is arranged on the exhaust pipe, and the set pressure performance of the exhaust valve is larger than that of a three-way valve.

The power device comprises a motor connected to the frame, a power output shaft of the motor is in power connection with a driving screw rod, and the front end of the driving screw rod is in threaded connection with the rear end of the piston rod.

The power output shaft of the motor is connected with a gearbox, an output gear is arranged on an output shaft of the gearbox, the driving screw is rotationally connected to the detection bin body, the rear end of the driving screw is provided with a rotating sleeve body in sealing fit with the detection bin body, and the rotating sleeve body is provided with an inner gear ring meshed with the output gear.

After the structure is adopted, a certain volume of liquid is injected into the piston cavity through the liquid inlet pipeline via the three-way valve, a full amount of liquid is also introduced into the liquid container to be detected, the liquid inlet pipeline connected with the three-way valve is closed, the piston cavity is kept to be communicated with the inner cavity of the liquid container to be detected through the three-way valve, the piston rod is driven by the driving mechanism to slide forwards, so that the liquid in the piston cavity is compressed, corresponding pressure is obtained through the pressure gauge, the moving amount of the piston rod is detected under the condition of certain pressure, a certain amount of the piston is obtained, the volume of the compressed liquid is calculated by utilizing the volume of the piston cavity and is kept for a certain time, as the three-way valve has set pressure performance, the volume of the total leaked liquid is calculated from the leakage amount of the three-way valve and the container to be detected, and the total volume of the leaked liquid is, the leakage amount of the container to be detected can be accurately known, so that the leakage condition of the container to be detected under certain pressure can be accurately detected, and the sealing performance of the container to be detected is accurately detected. Through the arrangement of the supporting device, the situations of shaking, rotation and the like of the piston rod can be effectively prevented, the influence on the accuracy of piston displacement detection caused by the situations of shaking, rotation and the like of the piston rod is avoided, and the accuracy of calculating the volume quantity of the compressed liquid is further ensured; the two sealing rings are arranged, so that the sealing performance between the piston and the piston cavity is further ensured, and the problem of inaccurate detection caused by the sealing performance is avoided.

To sum up, the utility model has the advantages of simple structure, convenient to use, the accurate reliable of testing result.

Drawings

The invention will be described in further detail with reference to the following drawings and embodiments:

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

FIG. 2 is a schematic structural view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of area B of FIG. 1;

fig. 4 is a schematic structural diagram of the lip-ear type sealing ring in the embodiment of fig. 1.

Detailed Description

Referring to fig. 1, the present invention provides an embodiment of a liquid container detection device, for convenience of description, the left side in fig. 1 is the rear side of the device, which includes a frame 1, the frame can not only contain the structure shown in the figure, but also can be of other structures, it is only used to support each component, the frame is equipped with a detection cabin 2, the detection cabin 2 is equipped with a driving cavity 3 and a piston cavity 4 from back to front, the diameter of the driving cavity is much larger than the diameter of the piston cavity, a piston 5 is arranged in the piston cavity 4, the piston is in sealing fit with the piston cavity, in combination with fig. 3 and fig. 4, in this embodiment, the piston 5 is equipped with at least two annular grooves 51 arranged at intervals, the annular groove at the front side is equipped with an O-shaped sealing ring 11, the annular groove at the rear side is equipped with a lip-ear type sealing ring 12, the lip-ear type sealing ring 12 includes an annular, the outer periphery of sealing washer body circles and is equipped with the protruding lip that the epirelief just encircles and establishes, shows in referring to fig. 4 promptly, even if appear revealing slightly between the chamber wall in outer lane of piston and the piston chamber, because the liquid that reveals has certain pressure, consequently this part liquid can the top pressure on above-mentioned protruding lip, therefore can make the protruding lip hug closely on the chamber wall in piston chamber, therefore has increased both sealing performance more, improves the detection accuracy nature of this device.

Referring to fig. 1 and 2, a piston rod 6 with a rear portion located in a driving cavity is mounted on a piston 5, a power device for driving the piston rod to move forward is mounted on a frame 1, the power device includes a motor 14 connected to the frame, a power output shaft of the motor is connected to a driving screw 15, a front end of the driving screw 15 is in threaded connection with a rear end of the piston rod 6, a support device for supporting the piston rod and preventing the piston rod from rotating and swinging is mounted in the driving cavity, the support device includes at least two sliding rails 9 connected to a cavity wall of the driving cavity 3 and arranged around the driving cavity, in this embodiment, two sliding rails are provided, a sliding groove extending axially along the driving cavity is provided in the sliding rail, a cross section of the sliding groove is square, a sliding block 10 which is matched with the sliding rail and can slide along the sliding rail is mounted on the piston rod 6 in a ring, that, the slider rigid coupling is on the piston rod, and the cross-section of slider also is square, and the slider sinks in the spout just to realize the structure that above-mentioned slider slided along the slide rail, above-mentioned structure has guaranteed the straightness accuracy of piston rod operation promptly, has prevented again that the problem of shake from appearing in the piston rod, and of course, above-mentioned slide rail and slider can adopt linear guide and slider, and its specific structure is prior art, and it is no longer detailed repeated here, and it can guarantee that the piston rod can not appear rocking or even bending deformation scheduling problem, has guaranteed the detection accuracy nature of this device. The power transmission device is characterized in that a power output shaft of the motor 14 is connected with a gearbox 16, an output gear is arranged on an output shaft of the gearbox 16, the driving screw is rotatably connected to the detection bin body 2, the rear end of the driving screw is provided with a rotating sleeve body 17 in sealing fit with the detection bin body, and the rotating sleeve body 17 is provided with an inner gear ring meshed with the output gear.

Referring to fig. 1 to 3, a pressure gauge 18 communicated with a piston cavity is connected to a detection bin body 2, an exhaust pipe 13 communicated with the piston cavity is arranged on the detection bin body, an exhaust valve is arranged on the exhaust pipe, the set pressure performance of the exhaust valve is greater than that of a three-way valve, a three-way valve 7 communicated with the piston cavity 4 and having the set pressure performance is arranged at the front end of the detection bin body 2, the three-way valve 7 has three branches, valves can be arranged on the three branches, the specific structure of the three-way valve is the prior art, valves 20 are respectively arranged on pipelines of the other two ports of the three-way valve 7, the pipelines of the two ports can be respectively connected with a liquid inlet pipeline and a container to be detected, a detection rod 8 is connected to the rear part of a piston rod 6, an extending end of the detection rod 8 extends out of the detection bin body, a slideway for the detection rod to slide back and forth is arranged on the detection bin body The linear displacement detection device can adopt the displacement sensor 21 existing on the market, for example, a KTS-E self-recovery series linear displacement sensor produced by Audkk electronics Limited company in Shenzhen, the concrete structure of the linear displacement detection device is the prior art, the detection head of the linear displacement detection device is connected with the detection rod, and the pressure gauge and the displacement sensor can clearly obtain corresponding pressure and displacement, so that the easy sealing performance of detection can be accurately known.

As shown in fig. 1 to 4, the using process of the present invention is as follows: injecting a certain volume of liquid into the piston cavity 4 through the liquid inlet pipeline and the three-way valve 7, discharging gas in the piston cavity by the exhaust valve, introducing full liquid into the liquid container 19 to be detected, closing the liquid inlet pipeline connected to the three-way valve 7, keeping the piston cavity 4 communicated with the inner cavity of the liquid container 19 to be detected through the three-way valve, driving the piston rod 6 to slide forwards through the power drive of the motor, compressing the liquid in the piston cavity, obtaining corresponding pressure through the pressure gauge, detecting the moving amount of the piston rod under the condition of certain pressure, obtaining a certain amount of the piston 5, calculating the volume of the liquid after compression by using the diameter of the piston cavity 4, keeping the volume for a certain time, and calculating the volume of the total leaked liquid from the leakage amount of the three-way valve and the container to be detected because the three-way valve has set pressure performance, through the calculation of the volume, the leakage amount of the container to be detected under the set pressure is accurately calculated, so that the leakage condition of the container to be detected under the certain pressure can be accurately known, and the sealing performance of the container to be detected is accurately detected. Above-mentioned computational method is not the uniqueness, can adopt other methods to calculate according to corresponding detection method, the utility model discloses only provide a detection device, the technical personnel in the field can carry out corresponding detection and calculation according to this detection device, no longer give consideration to in detail here.

To sum up, the present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. The above modifications fall into the protection scope of the present invention.

Claims

1. The utility model provides a liquid container detection device, includes frame (1), characterized by: a detection bin body (2) is arranged on a rack, a driving cavity (3) and a piston cavity (4) are arranged in the detection bin body (2) from back to front, a piston (5) is arranged in the piston cavity (4), a piston rod (6) with the rear part positioned in the driving cavity is arranged on the piston (5), a power device for driving the piston rod to move back and forth is arranged on the rack (1), a pressure gauge communicated with the piston cavity is connected on the detection bin body (2), a three-way valve (7) which is communicated with the piston cavity (4) and has set pressure performance is arranged at the front end of the detection bin body (2), valves (20) are respectively arranged on the pipelines of the other two ports of the three-way valve (7), two pipeline ports can be respectively connected with a liquid inlet pipeline and a container to be detected, the rear part of the piston rod (6) is connected with a detection rod (8) which extends out in, the detection cabin is provided with a slideway for the detection rod to slide forwards and backwards, the outer wall of the detection cabin (2) is connected with a linear displacement detection device for measuring the forward and backward sliding distance of the detection rod, and a supporting device for supporting the piston rod and preventing the piston rod from rotating and swinging is arranged in the driving cavity.

2. The liquid container inspection apparatus as claimed in claim 1, wherein: the supporting device comprises at least two sliding rails (9) which are connected to the wall of the driving cavity (3) and distributed along the driving cavity in a surrounding mode, and a sliding block (10) which is matched with the sliding rails and can slide along the sliding rails is mounted on the piston rod (6) in a surrounding mode.

3. The liquid container inspection apparatus as claimed in claim 1, wherein: the piston (5) is provided with at least two annular grooves (51) which are arranged at intervals, an O-shaped sealing ring (11) is arranged in the annular groove at the front side, and a lip-ear type sealing ring (12) is arranged in the annular groove at the rear side.

4. The liquid container inspection apparatus as claimed in claim 3, wherein: the lip ear type sealing ring (12) comprises an annular sealing ring body, and a convex lip which protrudes forwards and is annularly arranged along the outer periphery is arranged on the outer periphery of the sealing ring body.

5. The liquid container inspection device according to any one of claims 1 to 4, wherein: an exhaust pipe (13) communicated with the piston cavity is arranged on the detection bin body, an exhaust valve is arranged on the exhaust pipe, and the set pressure performance of the exhaust valve is larger than that of a three-way valve (7).

6. The liquid container inspection device according to any one of claims 1 to 4, wherein: the power device comprises a motor (14) connected to the rack, a power output shaft of the motor is in power connection with a driving screw rod (15), and the front end of the driving screw rod (15) is in threaded connection with the rear end of the piston rod (6).

7. The liquid container inspection device according to claim 6, wherein: the power output shaft of the motor (14) is connected with a gearbox (16), an output gear is arranged on an output shaft of the gearbox (16), the driving screw rod is rotationally connected to the detection bin body (2), the rear end of the driving screw rod is provided with a rotating sleeve body (17) in sealing fit with the detection bin body, and the rotating sleeve body (17) is provided with an inner gear ring meshed with the output gear.