CN218496339U - Airtightness testing device and system for flange - Google Patents

Abstract

The utility model discloses an air tightness testing device for flanges, which comprises a first base and a second base which are sequentially arranged along the longitudinal direction, wherein the first base is provided with a first accommodating cavity, and a limiting clamp is accommodated in the first accommodating cavity; the outer peripheral surface of the first base is provided with at least two first cylinders, the far end of each first cylinder is provided with a first limiting block towards the direction of the first accommodating cavity, and the first limiting blocks move along the radial direction towards or away from the limiting clamp under the action of the first cylinders; the limiting clamp is provided with at least two steps along the circumferential direction; along the longitudinal direction, each step is provided with a first inclined surface, and the first limiting block is provided with a second inclined surface matched with the first inclined surface; the first limiting block moves towards the limiting clamp under the action of the first air cylinder, so that the limiting clamp is fixed with the first base. By the scheme, the limit clamp is automatically disassembled, the disassembling efficiency is improved, and the air tightness detection efficiency is finally improved. The utility model also discloses a gas tightness test system for flange.

Description

Airtightness testing device and system for flange

Technical Field

The utility model relates to a test equipment technical field, in particular to gas tightness testing arrangement and system for flange.

Background

The tightness of the flange is usually tested using a tightness test-dedicated device, or for testing the flange for leaks. The flange is used as a safety piece and is a connector for communicating an oil supply pump of a vehicle oil tank with the outside. If the air tightness of the flange is poor, oil supply leakage can occur, and the life and property safety of a user can be directly influenced, so that the air tightness test of the flange is required to ensure the safety of a vehicle.

The special air tightness test equipment generally comprises a limiting clamp, a test clamp and a base for fixing the limiting clamp and the test clamp, wherein the limiting clamp is used for limiting the position of a flange in the base, and the test clamp is used for carrying out air tightness test on the flange assembled in the base. In the prior art, the limit clamp is generally fixed on the base by using a bolt under manual operation. Due to the fact that different flanges have different sizes, under the condition of detecting different flanges, bolts for fixing the limiting clamp and the base need to be continuously and manually taken down, the flange to be tested is placed into the base, and the limiting clamp is fixed on the base through the bolts under the manual operation. Therefore, the time spent for replacing different flanges or the time for changing the flange is increased, the operation for replacing the flange is very complicated, the labor consumption is increased, and the detection efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the loaded down with trivial details technical problem of dismouting of flange and spacing anchor clamps. The utility model provides a gas tightness testing arrangement for flange for the dismouting of limit clamp realizes automaticly, improves dismouting efficiency, has reduced artifical consuming time, and has improved detection efficiency.

In order to solve the technical problem, the embodiment of the utility model discloses an air tightness testing device for a flange, which comprises a first base and a second base which are sequentially arranged along the longitudinal direction, wherein the first base is provided with a first accommodating cavity and is detachably connected with the second base; the air tightness testing device for the flange further comprises: the limiting clamp is accommodated in the first accommodating cavity; the outer peripheral surface of the first base is provided with at least two first cylinders, the far end of each first cylinder is provided with a first limiting block towards the direction of the first accommodating cavity, and the first limiting blocks move along the radial direction towards or away from the limiting clamp under the action of the first cylinders; the limiting clamp is provided with at least two steps along the circumferential direction; each step is provided with a first inclined surface along the longitudinal direction, the first limiting block is provided with a second inclined surface matched with the first inclined surface, and the first inclined surface and the second inclined surface are arranged oppositely; the first limiting block moves towards the limiting clamp under the action of the first air cylinder, the first inclined plane is abutted against the second inclined plane, the limiting clamp is fixed with the first base, and the limiting clamp is limited to move longitudinally.

By adopting the technical scheme, the disassembly and assembly of the limiting clamp are automated, the disassembly and assembly efficiency is improved, the labor consumption is reduced, and the detection efficiency is improved.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, first inclined plane along the direction downward sloping towards first stopper.

According to another specific embodiment of the present invention, an embodiment of the present invention discloses an air tightness testing device for a flange, wherein the first base comprises a first substrate, which is at least partially hollow and is arranged along a radial direction, and a first sidewall, which is arranged on the first substrate along a longitudinal extension, and the first sidewall and the first substrate together form a first accommodating cavity; at least two first cylinders are mounted on the outer circumferential surface of the first base plate.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange is equipped with two at least first sensors on the first base, when first sensor detects limit clamp and places at the first intracavity that holds, first sensor feedback signal to PLC, the motion of each first cylinder orientation limit clamp of PLC control.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, first base plate is equipped with first through-hole along vertically running through, insert in the first through-hole and be equipped with first elastic component, first elastic component is fixed with first locating piece in the one end towards the second base, arrange first holding intracavity in when spacing anchor clamps, the first elastic component of vertical extrusion is followed to spacing anchor clamps, make first elastic component take place to deform, first elastic component moves along vertically and towards the second base to drive first locating piece along vertically moving towards the second base.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, and first sensor detects its distance to first locating piece periphery, and when the distance was in presetting threshold value within range, first sensor feedback signal to PLC, the motion of each first cylinder orientation spacing anchor clamps of PLC control.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, including the test fixture, the second base is formed with the second and holds the chamber, and the second holds chamber holding test fixture, and the interval is equipped with two at least second cylinders on the outer peripheral face of second base, and the distal end of each second cylinder is provided with the second stopper, and the second stopper is along radial and orientation or keep away from the test fixture motion under the drive of second cylinder, and the test fixture is equipped with two at least lugs along its circumference, and the second stopper moves towards the test fixture under the effect of second cylinder to with the lug butt, restriction test fixture is along longitudinal movement.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses an air tightness testing arrangement for flange, and the second base includes along the second base plate of radial setting, still includes and locates the second lateral wall on the second base plate along longitudinal extension, and the second lateral wall forms the second jointly with the second base plate and holds the chamber, and the second holds chamber holding test fixture, and the interval is equipped with two at least second cylinders on the outer peripheral face of second lateral wall.

According to the utility model discloses a another embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange is equipped with two at least second sensors on the second base, and when the second sensor detected test fixture and placed and hold the intracavity at the second, second sensor feedback signal to PLC, each second cylinder of PLC control moved towards test fixture.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, the second base plate is equipped with the second through-hole along vertically running through, it is equipped with the second elastic component to insert in the second through-hole, the second elastic component is fixed with the second locating piece in the one end towards the second base plate, it holds the intracavity to arrange the second in test fixture, test fixture makes the second elastic component take place to warp, the second elastic component moves along the direction that vertically faces away from first base to drive the second locating piece and move along the direction that vertically faces away from first base.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, and the second sensor detects its distance to the second locating piece periphery, and when the distance was in presetting threshold value within range, second sensor feedback signal to PLC, each second cylinder of PLC control moved towards test fixture.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, the flange that awaits measuring is followed vertical assembly on test fixture to form gas tightness test chamber between flange and the test fixture, be equipped with on the test fixture with the communicating inlet port in gas tightness test chamber.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, is equipped with two at least third cylinders on the outer peripheral face of first base, and limit clamp is along radially being equipped with two at least third stoppers to each third stopper links to each other with the third cylinder, and the third stopper moves towards or keeps away from the flange under the drive of third cylinder, makes the third stopper along radial centre gripping flange.

According to the utility model discloses a another embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, third stopper towards the terminal surface of flange and the outer peripheral face looks adaptation of flange.

According to the utility model discloses a further embodiment, the utility model discloses an embodiment discloses a gas tightness testing arrangement for flange, and spacing anchor clamps have the upper cover to and be fixed in the handle of upper cover, the outer peripheral face of upper cover and the inner peripheral surface looks adaptation of first lateral wall.

The utility model discloses an embodiment also discloses a gas tightness test system for flange, gas tightness test device for flange under the above-mentioned arbitrary embodiment still includes PLC, first sensor and second sensor, and PLC links to each other with first sensor, second sensor, receives the data signal of first sensor and/or second sensor and controls the operation of first cylinder and/or second cylinder.

The air tightness testing device for the flange not only realizes the automatic control of the fixing of the limiting clamp and the first base; and the automatic control of the fixation of the test fixture and the base is realized; the clamping of the limiting clamp on the flanges of various sizes is realized, a large amount of assembly time is saved, and the detection efficiency of the air tightness test is greatly improved.

Drawings

Fig. 1 is an exploded view of a device for testing air tightness for a flange according to the present invention;

fig. 2 is a perspective view of the air tightness testing device for a flange according to the present invention;

fig. 3 is a schematic view of the middle limiting clamp and the first base in an unassembled state;

fig. 4 shows a schematic diagram of a partial explosion of the middle limiting clamp of the present invention in an assembled state with the first base;

fig. 5 is a cross-sectional view of the air tightness testing device for a flange according to the present invention;

fig. 6 is a schematic view illustrating a state where the first sensor is mounted to the first substrate according to the present invention;

FIG. 7 shows an enlarged schematic view at A in FIG. 6;

fig. 8 is a schematic view of the test fixture and the second base of the present invention in an unassembled state;

fig. 9 is a schematic view illustrating an assembled state of the test fixture and the second base according to the present invention;

fig. 10 is a schematic view showing a state where a second sensor is mounted on a second substrate according to the present invention;

figure 11 shows a schematic view of a test fixture of the present invention;

fig. 12 is a schematic view of the third stopper of the present invention in a state of abutting against the flange;

fig. 13 is a schematic view illustrating a state where the third stopper of the present invention is not abutted against the flange;

the reference numbers illustrate:

the air tightness testing device 00 for the flange;

the first base 10, the first accommodating cavity 11, the first cylinder 101, the cylinder 1011, the piston rod 1012, the first stopper 102, the second inclined surface 1021, the first substrate 13, the first side wall 131, the penetrating part 1311, the first sensor 15, the first elastic member 132, the first positioning block 133, and the third cylinder 17;

the limiting clamp 20, a step 201, a first inclined surface 2011, a third limiting block 202, an upper cover 203 and a handle 204;

the second base 30, the second accommodating cavity 31, the second cylinder 301, the second limiting block 302, the second substrate 33, the second sidewall 331, the second sensor 35, the second elastic element 332, and the second positioning block 333;

the test fixture 40, the bump 401, the air intake hole 402;

a flange 50.

Detailed Description

The following description is given for illustrative embodiments of the invention, and other advantages and effects of the invention will be apparent to those skilled in the art from the disclosure of the present invention. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details are omitted from the description so as not to obscure or obscure the focus of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present invention is usually placed when the present invention is used, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the present embodiment can be understood as specific cases by those of ordinary skill in the art.

To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

With reference to fig. 1-5, the present invention provides an air tightness testing device 00 for flange, including a first base 10 and a second base 30 sequentially arranged along a longitudinal direction (a direction shown in fig. 1), the first base 10 is formed with a first accommodating cavity 11, and the first base 10 is detachably connected to the second base 30; the air tightness testing device 00 for the flange further comprises a limiting clamp 20, and the limiting clamp 20 is accommodated in the first accommodating cavity 11; at least two first air cylinders 101 are assembled on the outer peripheral surface of the first base 10, a first stopper 102 is arranged at the far end of each first air cylinder 101 in the direction towards the first accommodating cavity 11, and the first stopper 102 moves in the radial direction (the direction R shown in fig. 3 or fig. 4) towards or away from the limiting clamp 20 under the action of the first air cylinders 101; the spacing jig 20 is provided with at least two steps 201 along its circumferential direction (direction C shown in fig. 5); along the longitudinal direction, the step 201 is provided with a first inclined surface 2011, the first limiting block 102 is provided with a second inclined surface 1021 matched with the first inclined surface 2011, and the first inclined surface 2011 and the second inclined surface 1021 are arranged oppositely; the first limiting block 102 moves towards the limiting clamp 20 under the action of the first cylinder 101, so that the first inclined surface 2011 abuts against the second inclined surface 1021, the limiting clamp 20 is fixed with the first base 10, and the limiting clamp 20 is limited to move longitudinally.

Through setting up first inclined plane 2011 and second inclined plane 1021 to under the effect of the first cylinder 101 through assembling in first base 10, make first stopper 102 move towards step 201, so that first inclined plane 2011 offsets with second inclined plane 1021, first inclined plane 2011 makes first base 10 and the limit clamp 20 of assembling first cylinder 101 fixed with the limit clamp 20 in the tight top with second inclined plane 1021, has restricted limit clamp 20 along longitudinal movement.

It should be noted that, in the present embodiment, the positions of the at least two first cylinders 101 are arranged to enable the first inclined surface 2011 to abut against the second inclined surface 1021, and further, the limiting clamp 20 is fixed to the first base 10, for example, two first cylinders 101 may be assembled on the outer circumferential surface of the first side wall 131, and the two first cylinders 101 are symmetrically arranged along the radial direction (R direction shown in fig. 3), the distal end of each first cylinder 101 is provided with a first limiting block 102 towards the first accommodating cavity 11, the limiting clamp 20 is provided with two steps 201 along the circumferential direction thereof, and the two first cylinders 101 are symmetrically arranged along the radial direction. The utility model discloses an in other possible embodiments, first cylinder 101 can also set up to other quantity to correspond and set up the first stopper 102 the same with first cylinder 101 quantity, and correspond and set up the step 201 with the same quantity of first stopper 102 on limit clamp 20, as long as the first inclined plane 2011 of final step 201 offsets with the second inclined plane 1021 of first stopper 102, make limit clamp 20 fixed with first base 10 can.

In other possible embodiments, with continued reference to fig. 4 and 5, the first inclined surface 2011 is inclined downward in a direction toward the first stopper 102, that is, the second inclined surface 1021 cooperating with the first inclined surface 2011 is inclined upward in a direction toward the step 201. When the first inclined surface 2011 abuts against the second inclined surface 1021, the first limiting block 102 generates a pressure along a longitudinal direction (a direction shown in fig. 4) on the first step 201, so that the first limiting block 102 presses the step 201, and further the first base 10 is tightly matched with the limiting clamp 20, so that the limiting clamp 20 is fixed on the first base 10.

Of course, in other possible embodiments, the first inclined surface 2011 may be inclined upward in a direction toward the first stopper 102, and the second inclined surface 1021 may be inclined upward in a direction toward the step 201.

In other possible embodiments, referring to fig. 3, the first base 10 includes an at least partially hollow first substrate 13 disposed along a radial direction (R direction shown in fig. 3), and a first sidewall 131 extending along a longitudinal direction (a direction shown in fig. 3) and disposed on the first substrate 13, the first sidewall 131 and the first substrate 13 together forming the first accommodating chamber 11; at least two first cylinders 101 are mounted on the outer circumferential surface of the first base plate 13.

Referring to fig. 4, the first substrate 13 is used to support the limiting clamp 20, and the first cylinder 101 is assembled on the outer peripheral surface of the first substrate 13, wherein the first cylinder 101 has a cylinder body 1011 and a piston rod 1012 movably connected to the cylinder body 1011, and a first limiting block 102 is disposed at the distal end of the piston rod 1012, and when the piston rod 1012 moves, the first limiting block 102 is driven to move. The cylinder 1011 is fixed to the first sidewall 131, and the first sidewall 131 is provided with a through portion 1311 extending in the radial direction (R direction shown in fig. 4), the through portion 1311 accommodating at least a part of the piston rod 1012 and at least a part of the first stopper 102, and the first stopper 102 is extendable relative to the through portion 1311 to be movable toward the stopper jig 20 in the radial direction.

The first air cylinder 101 drives the first limiting block 102 to move towards or away from the limiting clamp 20, so that the second inclined surface 1021 of the first limiting block 102 is abutted against the first inclined surface 2011 of the step 201 formed by the limiting clamp 20, and the fixing of the limiting clamp 20 and the first base 10 is realized.

In other possible embodiments, referring to fig. 6, at least two first sensors 15 are provided on the first base 10, and when the first sensors 15 detect that the limit jig 20 is placed in the first accommodating cavity 11, the first sensors 15 feed back signals to a PLC (not shown in the figure), and the PLC controls each first cylinder 101 to move towards the limit jig 20.

Specifically, the first substrate 13 of the first base 10 has a first end face (not shown) facing the position-limiting clamp 20, and a second end face (not shown) facing away from the first end face or facing the second base 30, and each first sensor 15 is mounted on the second end face, and the first sensor 15 is used for detecting whether the position-limiting clamp 20 is placed in the first accommodating cavity 11. The installation position of the first sensor 15 is not limited to a specific position, and the first sensor 15 can detect whether the limiting clamp 20 is placed in the first accommodating chamber 11.

In a possible other embodiment, referring to fig. 6 and 7, the first substrate 13 is provided with a first through hole (not shown) extending in a longitudinal direction (a direction shown in fig. 6), the first elastic member 132 is inserted into the first through hole, the first elastic member 132 is fixed with a first positioning block 133 at an end facing the second base 30, when the limiting clamp 20 is placed in the first accommodating cavity 11, the first substrate 13 supports the limiting clamp 20, and the limiting clamp 20 presses the first elastic member 132 extending through the first substrate 13 in the longitudinal direction, so that the first elastic member 132 deforms, the first elastic member 132 moves in the longitudinal direction and towards the second base 30, and drives the first positioning block 133 fixed with an end of the first elastic member 132 to move in the longitudinal direction and towards the second base 30.

The first sensor 15 can detect the distance from the first sensor 15 to the periphery of the first positioning block 133, when the limiting clamp 20 is not placed in the first accommodating cavity 11, the first elastic member 132 is at an initial position, and at this time, the distance is the distance from the first elastic member 132 to the first sensor 15, when the limiting clamp 20 is placed in the first accommodating cavity 11, due to the pressure of the self-gravity of the limiting clamp 20, the first elastic member 132 can move along the longitudinal direction and towards the second base 30, the movement of the first elastic member 132 also drives the first positioning block 133 fixed on the first elastic member 132 to move towards the second base 30 along the longitudinal direction, and at this time, the distance is the distance from the first positioning block 133 to the first sensor 15, and the distance changes, when the distance is within a preset threshold range, the first sensor 15 feeds back a signal to the PLC, and the PLC controls each first cylinder 101 to move towards the limiting clamp 20.

Above, when the position limiting clamp 20 is placed in the first accommodating cavity 11, the first sensor 15 feeds back a signal to the PLC, the PLC can control each first cylinder 101 to move towards the position limiting clamp 20, in the moving process of the first cylinder 101, the second inclined surface 1021 of the first limiting block 102 assembled at the far end of the first cylinder 101 fixed on the first base 10 can be abutted against the first inclined surface 2011 of the step 201 formed by the position limiting clamp 20, finally, the position limiting clamp 20 is tightly matched with the first base 10, and the longitudinal movement of the position limiting clamp 20 is limited.

Design through first inclined plane 2011 and second inclined plane 1021 has changed the mode that adopts artifical fastening bolt to fix limit clamp 20 and first base 10 among the prior art, and survey limit clamp 20's installation through setting up first sensor 15, after detecting that limit clamp 20 assembles first base 10, first sensor 15 feedback signal to PLC, the motion of the first cylinder of PLC automatic control 101, the automated control that limit clamp 20 and first base 10 were fixed mutually has been realized, the efficiency that the flange gas tightness detected has been improved greatly, and reduced the cost of labor and assemble consuming time.

When the limiting clamp 20 needs to be replaced, the PLC controls the first cylinder 101 to move along the radial direction and in the direction away from the limiting clamp 20, so that the first inclined surface 2011 and the second inclined surface 1021 are no longer abutted, the fixing of the first base 10 and the limiting clamp 20 is released, the limiting clamp 20 is conveniently taken out of the first base 10, and the limiting clamp 20 to be replaced is placed in the first accommodating cavity 11 of the first base 10.

In another possible embodiment, referring to fig. 8 and 9, the flange air tightness testing device 00 comprises a testing fixture 40, wherein the second base 30 of the flange air tightness testing device 00 comprises a second base plate 33 arranged along a radial direction (direction R shown in fig. 9), and further comprises a second side wall 331 extending along a longitudinal direction (direction a shown in fig. 8) and arranged on the second base plate 33, the second side wall 331 and the second base plate 33 form a second accommodating cavity 31, the second accommodating cavity 31 is used for accommodating the testing fixture 40, the second base plate 33 supports the testing fixture 40, the outer circumferential surface of the second side wall 331 is provided with at least two second air cylinders 301 at intervals, the distal end of each second air cylinder 301 is provided with a second stopper 302, the second stopper 302 is moved along the radial direction by the second air cylinder 301 and moved towards or away from the testing fixture 40, the testing fixture 40 is provided with at least two bumps 401 along the circumferential direction (direction C shown in fig. 8), and the second stopper 302 is moved towards the testing fixture 40 by the second air cylinders 301 and abuts against the bumps to fix the testing fixture 40 and the second base plate 401.

In the present embodiment, the positions of at least two second cylinders 301 may be arranged so that the second base 30 and the boss 401 can be fixed. For example, two second air cylinders 301 may be assembled on the outer circumferential surface of the second side wall 331, the two second air cylinders 301 are symmetrically arranged in the radial direction, a distal end of each second air cylinder 301 is provided with a second stopper 302 facing the direction of the second accommodating cavity 31, and the test fixture 40 is provided with two protrusions 401 along the circumferential direction thereof. In other possible embodiments of the present invention, the second cylinder 301 can be set to other numbers, and the same number of bumps 401 are correspondingly set on the test fixture 40, so long as the second stopper 302 of the second cylinder 301 abuts against the bump 401 of the test fixture 40, so that the test fixture 40 is fixed to the second base 30.

In other possible embodiments, referring to fig. 10, at least two second sensors 35 are disposed on the second base 30, and when the second sensors 35 detect that the test fixture 40 is placed in the second receiving cavity 31, the second sensors 35 feed back signals to the PLC, and the PLC controls each second air cylinder 301 to move towards the test fixture 40.

Specifically, the second sensor 35 may be mounted on the second substrate 33 of the second base 30.

In other possible embodiments, with continued reference to fig. 10, the second substrate 33 is provided with a second through hole (not shown) extending through the second substrate along the longitudinal direction (direction a shown in fig. 10), a second elastic member 332 is inserted into the second through hole, a second positioning block 333 is fixed at one end of the second elastic member 332 facing the second substrate 33, when the test fixture 40 is placed in the second accommodating cavity 31, the test fixture 40 deforms the second elastic member 332, the second elastic member 332 moves along the longitudinal direction in a direction away from the first base 10, and the second positioning block 333 is driven to move along the longitudinal direction in a direction away from the first base 10.

Similarly, the second sensor 35 may detect a distance from itself to the periphery of the second positioning block 333, when the test fixture 40 is not placed in the second accommodating cavity 31, the second elastic member 332 is in an initial position, where the distance is a distance from the second elastic member 332 to the second sensor 35, when the test fixture 40 is placed in the second accommodating cavity 31, due to pressure of the self-weight of the test fixture 40, the second elastic member 332 moves in the longitudinal direction and in a direction away from the first base 10, and the movement of the second elastic member 332 drives the second positioning block 333 fixed to the second elastic member 332 to also move in the longitudinal direction and in a direction away from the first base 10, where the distance is a distance from the second positioning block 333 to the second sensor 35, and the distance changes, and when the distance is within a preset threshold range, the second sensor 35 feeds back a signal to the PLC, the PLC controls each second cylinder 301 to move toward the position-limiting fixture 20, and finally the second positioning block 302 of the second cylinder 301 abuts against the test fixture 40, so that the test fixture 40 is fixed to the second base 30.

The design enables the fixing of the limit clamp 20 and the first base 10 to be automatically controlled, and the fixing of the test clamp 40 and the second base 30 to be automatically controlled.

When the limit clamp 20 and the test clamp 40 need to be replaced simultaneously, the PLC controls the first cylinder 101 to move along the radial direction and in the direction away from the limit clamp 20, so that the first inclined surface 2011 and the second inclined surface 1021 are no longer abutted, the fixing of the first base 10 and the limit clamp 20 is released, the second cylinder 301 is controlled to move along the radial direction and in the direction away from the test clamp 40, the fixing of the second base 30 and the test clamp 40 is released, the limit clamp 20 and the test clamp 40 are conveniently taken out of the first base 10, and then the test clamp 40 to be used is replaced into the second accommodating cavity 31 of the second base 30 and the limit clamp 20 to be used is replaced into the first accommodating cavity 11 of the first base 10.

In the above, the assembly of the position limiting jig 20 and the first base 10 is completed, and the assembly of the test jig 40 and the second base 30 is completed.

Referring to fig. 1, 2 and 11, a flange 50 to be tested is longitudinally mounted on a test fixture 40 (direction a shown in fig. 1), a sealed air-tightness test chamber (not shown) is formed between the flange 50 and the test fixture 40, and an air inlet 402 communicated with the air-tightness test chamber is formed on the test fixture 40.

Due to the difference of the sizes of the models of the flanges, when the flanges with different sizes need to be tested, the limiting clamp 20 matched with the flanges needs to be assembled, after one flange is tested, the next flange needs to be tested in the process of using the traditional air tightness device for testing the flanges, but due to the fact that the sizes of the two flanges are different, the limiting clamp 20 needs to be replaced first, then the next flange to be tested is assembled, and then the air tightness test of the flange can be carried out, so that the detection efficiency is low, particularly, when the limiting clamp 20 and the first base 10 are manually fastened by using bolts, the limiting clamp 20 matched with the flange to be tested needs to be manually disassembled from the first base 10, then the limiting clamp 20 matched with the flange to be tested is assembled, and then the flange to be tested is subjected to the air tightness test, so that the detection efficiency is extremely low.

In the present embodiment, referring to fig. 12 and 13, at least two third cylinders 17 are assembled on the outer circumferential surface of the first base 10, at least two third stoppers 202 are assembled on the stopper fixture 20 along the radial direction (R direction shown in fig. 12 or 13), each third stopper 202 is connected to the third cylinder 17, and the third stoppers 202 are driven by the third cylinders 17 to move toward or away from the flange 50, so that the third stoppers 202 clamp the flange 50 along the radial direction.

It should be noted that, in this embodiment, the number of the third cylinders 17 is four, and four third limiting blocks 202 are correspondingly disposed, every two third cylinders 17 are symmetrically disposed along the radial direction, and the third limiting blocks 202 move toward the flange 50 under the driving of the third cylinders 17, so that the third limiting blocks 202 clamp the flange 50 along the radial direction. In other possible embodiments of the present invention, the specific number and the specific installation position of the third cylinders 17 are not limited, as long as the third limiting blocks 202 connected to the third cylinders 17 can clamp the flange 50 along the radial direction.

The end surface of the third stopper 202 facing the flange 50 is adapted to the outer peripheral surface of the flange 50, so that the third stopper 202 is in surface contact with the flange 50, and in other possible embodiments, the third stopper 202 may also be in line contact with the flange 50, as long as the flange 50 is finally clamped by the third stopper 202 in the radial direction.

Because the third limiting block 202 is arranged on the limiting clamp 20, and the third limiting block 202 can move along the radial direction under the action of the third air cylinder 17 assembled with the third limiting block 202, the third limiting block 202 can limit the flanges 50 to be tested with different sizes, so that the limiting clamp 20 can clamp the flanges 50 with various sizes, the condition that the limiting clamp 20 matched with the limiting clamp 20 needs to be assembled when the flanges with different sizes are assembled in the prior art can be avoided, a large amount of assembling time is saved, and the detection efficiency of the air tightness test is greatly improved.

After the limiting clamp 20 and the first base 10 are assembled, and the test clamp 40 and the second base 30 are assembled, the flange 50 to be tested is assembled on the test clamp 40, the third limiting block 202 of the limiting clamp 20 clamps the flange 50 to be tested under the control of the PLC, and the process of limiting the flange 50 to be tested by the limiting clamp 20 is automatically controlled.

So far, the assembly of the limiting clamp 20 and the first base 10 is completed, the assembly of the testing clamp 40 and the second base 30 is completed, the assembly of the testing clamp 40 and the flange 50 to be tested is completed, and then the subsequent air tightness test can be performed on the flange 50. The flow of the subsequent airtightness test is as follows: in the first step, an external vacuum pump (not shown) is used to suck the air tightness testing chamber through the air inlet 402, so that the air tightness testing chamber is under negative pressure (-500 +/-10 mbar). And step two, closing the test loop and entering a pressure maintaining stage. And thirdly, detecting whether the flange 50 has a leakage point or not, and detecting whether the air tightness is qualified (< 0.6ml/min is qualified).

In other possible embodiments, referring to fig. 3, the position-limiting jig 20 has an upper cover 203, and a handle 204 fixed to the upper cover 203, and an outer circumferential surface of the upper cover 203 is fitted to an inner circumferential surface of the first sidewall 131. Due to the design of the handle 204, when the limiting clamp 20 is disassembled and assembled, the upper limiting clamp 20 can be conveniently taken down or assembled on the first base 10, and the operation is convenient.

The assembly process of the device comprises the steps that the test fixture 40 is placed into the second accommodating cavity 31, the second sensor 35 detects the placement of the test fixture 40, signals are fed back to the PLC, the PLC controls the second air cylinder 301 to move towards the second accommodating cavity 31, the second limiting block 302 assembled at the far end of the second air cylinder 301 is enabled to be abutted to the convex block 401 assembled on the peripheral surface of the test fixture 40, and the second base 30 is further fixed with the test fixture 40; then, the limiting clamp 20 is placed into the first accommodating cavity 11, the first sensor 15 detects the placement of the limiting clamp 20, a signal is fed back to the PLC, the PLC controls the first air cylinder 101 to move towards the first accommodating cavity 11, the first limiting block 102 assembled at the far end of the first air cylinder 101 is enabled to be abutted against a step 201 arranged on the limiting clamp 20, and the first base 10 is further enabled to be fixed with the limiting clamp 20; then, the flange 50 to be tested is placed on the test fixture 40, the PLC controls the third cylinder 17 to move towards the flange 50, so that the third limiting block 202 assembled at the far end of the third cylinder 17 abuts against the outer peripheral surface of the flange 50, and the third limiting block 202 clamps the flange 50.

The flange 50 to be tested is longitudinally assembled on the test fixture 40, a closed air tightness test cavity is formed between the flange 50 and the test fixture 40, an air inlet 402 communicated with the air tightness test cavity is formed in the test fixture 40, the air tightness test cavity is sucked through the air inlet 402 by an external vacuum pump, so that the air tightness test cavity is in a negative pressure state, whether the flange 50 has leakage points or not is detected in the negative pressure state, and whether the air tightness is good or not is detected.

In other possible embodiments, the first sensor 15 and the second sensor 35 comprise proximity sensors, ultrasonic sensors.

The utility model discloses still provide an air tightness test system for flange, include as above-mentioned air tightness test device 00 for flange under any embodiment, still include PLC (not shown in the figure), first sensor 15 and second sensor 35, PLC links to each other with first sensor 15, second sensor 35, receives the data signal of first sensor 15 and/or second sensor 35 and controls the operation of first cylinder 101 and/or second cylinder 301.

The utility model provides a gas tightness test system for flange for the dismouting of limit clamp realizes automaticly, has improved dismouting efficiency, has reduced artifical consuming time, and has improved detection efficiency.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention, and it is not intended to limit the invention to the specific embodiments described. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (16)

1. The air tightness testing device for the flange is characterized by comprising a first base and a second base which are sequentially arranged along the longitudinal direction, wherein a first accommodating cavity is formed in the first base, and the first base is detachably connected with the second base; the air tightness testing device for the flange further comprises:

the limiting clamp is accommodated in the first accommodating cavity;

the outer peripheral surface of the first base is provided with at least two first cylinders, the far end of each first cylinder is provided with a first limiting block towards the direction of the first accommodating cavity, and the first limiting blocks move along the radial direction and towards or away from the limiting clamp under the action of the first cylinders;

the limiting clamp is provided with at least two steps along the circumferential direction; along the longitudinal direction, each step is provided with a first inclined surface, the first limiting block is provided with a second inclined surface matched with the first inclined surface, and the first inclined surface and the second inclined surface are oppositely arranged; the first limiting block moves towards the limiting clamp under the action of the first air cylinder, so that the first inclined plane is abutted against the second inclined plane, the limiting clamp is fixed with the first base, and the limiting clamp is limited to move longitudinally.

2. A airtightness testing apparatus for a flange according to claim 1, wherein the first inclined surface is inclined downward in a direction toward the first stopper.

3. A gas tightness testing device for a flange according to claim 1, wherein said first base includes an at least partially hollowed first base plate disposed along said radial direction, and a first sidewall disposed on said first base plate along said longitudinal direction, said first sidewall and said first base plate jointly forming said first accommodating chamber; at least two of the first cylinders are mounted on an outer circumferential surface of the first base plate.

4. An air tightness testing device for a flange according to claim 3, wherein at least two first sensors are provided on said first base, and when said first sensors detect that said position-limiting jig is placed in said first receiving cavity, said first sensors feed back signals to a PLC, and said PLC controls each of said first cylinders to move toward said position-limiting jig.

5. An air-tightness testing device for a flange as claimed in claim 4, wherein a first through hole is formed through said first base plate along said longitudinal direction, a first elastic member is inserted into said first through hole, a first positioning block is fixed to an end of said first elastic member facing said second base, when said position-limiting clamp is placed in said first receiving cavity, said position-limiting clamp presses said first elastic member along said longitudinal direction to deform said first elastic member, said first elastic member moves along said longitudinal direction and toward said second base, and said first positioning block is driven to move along said longitudinal direction toward said second base.

6. A airtightness testing apparatus for a flange according to claim 5, wherein the first sensor detects a distance from an outer periphery of the first positioning block, and when the distance is within a preset threshold value, the first sensor feeds back a signal to the PLC, which controls each of the first cylinders to move toward the position-limiting jig.

7. An air tightness testing device for a flange according to claim 1, comprising a testing fixture, wherein said second base is formed with a second receiving cavity, said second receiving cavity receives said testing fixture, at least two second cylinders are mounted on an outer circumferential surface of said second base at intervals, a second stopper is disposed at a distal end of each of said second cylinders, said second stoppers are driven by said second cylinders to move in said radial direction and towards or away from said testing fixture, said testing fixture is provided with at least two protrusions along a circumferential direction thereof, said second stoppers are driven by said second cylinders to move towards said testing fixture and abut against said protrusions to restrict said testing fixture from moving in said longitudinal direction.

8. An air tightness testing device for a flange according to claim 7, wherein said second base includes a second base plate disposed along said radial direction, and further includes a second side wall disposed on said second base plate along said longitudinal direction, said second side wall and said second base plate together forming said second receiving cavity, said second receiving cavity receiving said testing fixture, and at least two second air cylinders mounted on an outer circumferential surface of said second side wall at intervals.

9. An air-tightness testing device for flanges according to claim 8, wherein at least two second sensors are provided on said second base, and when said second sensors detect that said testing jig is placed in said second receiving cavity, said second sensors feed back signals to a PLC, and said PLC controls each of said second air cylinders to move toward said testing jig.

10. A gas tightness testing device for a flange according to claim 9, wherein a second through hole penetrates through said second base plate along said longitudinal direction, a second elastic member is inserted into said second through hole, a second positioning block is fixed to one end of said second elastic member facing said second base plate, when said test fixture is placed in said second receiving cavity, said test fixture deforms said second elastic member, said second elastic member moves along said longitudinal direction in a direction deviating from said first base, and said second positioning block is driven to move along said longitudinal direction in a direction deviating from said first base.

11. An air-tightness testing device for flanges according to claim 10, wherein said second sensor detects a distance from an outer circumference of said second positioning block, and when said distance is within a preset threshold value, said second sensor feeds back a signal to said PLC, and said PLC controls each of said second air cylinders to move toward said testing jig.

12. The airtightness testing apparatus for a flange according to claim 7, wherein a flange to be tested is mounted on the test fixture in the longitudinal direction, and an airtightness testing chamber is formed between the flange and the test fixture, and the test fixture is provided with an air inlet hole communicating with the airtightness testing chamber.

13. An air tightness testing device for a flange according to claim 12, wherein at least two third air cylinders are provided on an outer circumferential surface of said first base, said stopper jig is provided with at least two third stoppers along said radial direction, and each of said third stoppers is connected to said third air cylinder, and said third stoppers are moved toward or away from said flange by said third air cylinder, so that said third stoppers grip said flange along said radial direction.

14. An air-tightness testing device for a flange as claimed in claim 13, wherein an end surface of said third stopper facing said flange is fitted to an outer peripheral surface of said flange.

15. The airtightness testing apparatus for a flange according to claim 3, wherein said positioning jig has an upper cover, and a handle fixed to said upper cover, and an outer peripheral surface of said upper cover is fitted to an inner peripheral surface of said first side wall.

16. An air tightness testing system for flanges, comprising the air tightness testing device for flanges according to any one of claims 1 to 15, and further comprising a PLC, a first sensor and a second sensor, wherein the PLC is connected to the first sensor and the second sensor, receives data signals of the first sensor and/or the second sensor, and controls the operation of the first cylinder and/or the second cylinder.

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