Sealing test device for conical surface of valve disc

Abstract

The utility model discloses a sealing test device for a conical surface of a valve disc. The sealing test device comprises a working cylinder, a mounting seat, a pressing mechanism and a leak detection mechanism, the working cylinder is vertically fixed on the mounting seat, the pressing mechanism is fixed at the piston rod end of the cylinder, and the leak detection mechanism is arranged at the bottom of the mounting seat and corresponds to the pressing mechanism. The leakage detecting mechanism comprises a leakage detecting cylinder sleeve, a spring, a supporting pin, a positioning sleeve and a split leakage detecting seat ring, and the seat ring is composed of a seat body and a seat ring and is installed through an annular groove and a protrusion. During testing, the head of the air valve is matched with the top of an inner hole of the leak-detecting seat ring to form an exhaust chamber, and the leak-detecting cylinder sleeve is provided with an exhaust hole. An air inlet chamber and an air inlet hole are formed in the pressing mechanism and used for pressing the upper portion of the air valve. The device can effectively test the sealing performance of the conical surface of the valve disc.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of sealing test devices for valve disc cone surface. BACKGROUND

[0002] After engine intake and exhaust valve production and processing are completed, the product is detected before leaving factory, and the sealing property of its cone surface needs to be detected. The principle of the manual sealing detector used in the existing small batch production is as follows: the valve is pressed into the detection clamp, the sealing cover is pressed tightly, then compressed air is filled, and whether the valve is qualified or not is judged by observing whether there is air bubble in the water tank connected with the exhaust hole (unqualified if there is air bubble). In the above structure, the valve is pressed into the detection clamp, the valve and the detection clamp are tightly matched, and the valve is not easy to take out after testing, which not only reduces the detection efficiency, but also easily damages the valve when taking out.

[0003] In the face of the above problems, the prior art proposes a split structure, which places the valve on the test seat, and makes the valve and the inner side edge of the through hole of the test seat fit by the down press, and then fills gas, which ensures the convenience of taking the valve, but the edge in contact with the valve is easy to be damaged, so the whole part needs to be replaced, and the maintenance and replacement cost is high. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the above prior art deficiencies, and provides a kind of sealing test devices for valve disc cone surface.

[0005] A kind of sealing test devices for valve disc cone surface, including working cylinder, mounting seat, press tightly mechanism and leak detection mechanism;Working cylinder is vertically fixed on the top of mounting seat, the inside of mounting seat is equipped with chamber, and the piston rod of working cylinder passes into chamber from the top of mounting seat;Press tightly mechanism is fixed at the end of piston rod of working cylinder, and leak detection mechanism is set in the bottom of mounting seat, and corresponds with the position of press tightly mechanism;

[0006] Leak detection mechanism includes leak detection cylinder sleeve, second spring, support pin, positioning sleeve and leak detection seat ring, leak detection cylinder sleeve is fixed in the bottom of mounting seat, second spring is supported in the inner hole of lower end of leak detection cylinder sleeve, support pin is supported on the upper end of second spring, support pin is movably connected with the inner hole of lower end of leak detection cylinder sleeve, positioning sleeve is set in the inner hole of upper end of leak detection cylinder sleeve, and the inner hole of upper end is communicated with the inner hole of lower end, leak detection seat ring is supported on the top of leak detection cylinder sleeve, valve stem lower end passes through leak detection seat ring and positioning sleeve in sequence, and is supported on support pin, when testing, valve head valve disc cone surface and leak detection seat ring inner hole top coincide, the cavity between valve head, leak detection seat ring, leak detection cylinder sleeve and positioning sleeve forms exhaust chamber, and one side of leak detection cylinder sleeve is equipped with exhaust hole communicated with exhaust chamber;

[0007] The inner side of press tightly mechanism is equipped with air inlet chamber, the air inlet chamber is equipped with air inlet hole communicated with outside, and the press tightly mechanism is used to exert pressure on the upper side of valve.

[0008] The leak detection seat ring is a split structure, comprising a seat body and a seat ring, a mounting groove is arranged at the center of the seat body, a through hole is arranged at the center of the bottom surface of the mounting groove, and an annular groove is arranged around the through hole on the bottom surface of the mounting groove; the seat ring is in a ring-shaped structure, and an annular protrusion corresponding to the annular groove is arranged at the bottom of the seat ring, and the seat ring is mounted in the mounting groove.

[0009] Further, the pressing mechanism comprises a universal connecting sleeve, a pressing cylinder, a connecting block, a connecting shaft, a first spring and a pressing head, the universal connecting sleeve is fixed at the end of the piston rod of the working cylinder, the pressing cylinder is fixed at the lower side of the universal connecting sleeve, an air inlet hole is arranged on one side of the pressing cylinder, the connecting block, the connecting shaft, the first spring and the pressing head are arranged in the air inlet chamber of the pressing cylinder, the upper end of the connecting block is fixed at the top of the air inlet chamber of the pressing cylinder, the lower end of the connecting block is fixedly connected with the upper end of the connecting shaft, the pressing head is sleeved on the lower end of the connecting shaft and movably connected with the lower end of the connecting shaft, and the first spring is sleeved on the connecting shaft and fixedly connected with the connecting block and the pressing head.

[0010] Further, a notch is arranged at the edge of the mounting groove of the seat body.

[0011] Further, a sealing ring is arranged at the bottom of the pressing cylinder.

[0012] Further, the inner side of the seat ring is a conical surface.

[0013] Further, a positioning block is arranged at the bottom of the leak detection cylinder sleeve.

[0014] Further, a sealing ring is arranged between the top of the leak detection seat ring and the leak detection cylinder sleeve.

[0015] Further, a sealing ring is arranged between the seat ring and the mounting groove.

[0016] Advantages: Compared with the prior art, the utility model has the following advantages:

[0017] The device realizes the high integration of the sealing test of the valve disc conical surface through the combination of the working cylinder, the mounting seat, the pressing mechanism and the leak detection mechanism. Meanwhile, the design of the pressing mechanism and the leak detection mechanism and other components makes them easy to disassemble and maintain, and improves the flexibility and efficiency of the test.

[0018] The leak detection mechanism can accurately simulate the stress condition of the valve in the working state and detect the sealing performance of the valve disc conical surface through the precise cooperation of the leak detection cylinder sleeve, the second spring, the supporting pin, the positioning sleeve and the leak detection seat ring. Especially, the sealing ring arranged between the leak detection seat ring and the top of the leak detection cylinder sleeve further ensures the accuracy of the test.

[0019] The leak detection seat ring adopts a split structure, including a seat body and a seat ring, which facilitates replacement and maintenance, and reduces the use cost.

[0020] The pressing mechanism realizes flexible application of pressure on the top of the valve through the combination of the universal connecting sleeve, the pressing cylinder, the connecting block, the connecting shaft, the first spring and the pressure head. In particular, the design of the first spring can buffer the pressure and protect the valve from being damaged.

[0021] Sealing rings are arranged between the bottom of the pressing cylinder and the seat ring and the installation groove, which ensures the air tightness during the test and avoids the influence of gas leakage on the test results.

[0022] An exhaust hole is arranged on one side of the leak detection cylinder sleeve and communicates with the exhaust chamber, which facilitates the exhaust of gas during the test and ensures the smooth progress of the test.

[0023] The positioning block extending from the bottom of the leak detection cylinder sleeve facilitates accurate positioning during installation, improving the convenience and accuracy of installation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is an internal schematic view of a sealing test device for the conical surface of the valve disc.

[0025] Fig. 2 It is a schematic view of the leak detection seat ring.

[0026] Fig. 3 It is a sectional view of the leak detection seat ring.

[0027] In the figure, 1 is a working cylinder, 2 is a mounting seat, 3 is a pressing mechanism, 4 is a leak detection mechanism, 11 is a piston rod, 21 is a top plate, 22 is a bottom plate, 23 is a vertical column, 31 is a universal connecting sleeve, 32 is a pressing cylinder, 33 is a connecting block, 34 is a connecting shaft, 35 is a first spring, 36 is a pressure head, 37 is a pressing block, 38 is a sealing ring, 39 is an air inlet hole, 41 is a leak detection cylinder sleeve, 42 is a second spring, 43 is a supporting pin, 44 is a positioning sleeve, 45 is a leak detection seat ring, 451 is a conical surface, 452 is a seat body, 453 is a seat ring, and 454 is a notch. DETAILED DESCRIPTION

[0028] In order to deepen the understanding of the present application, the present application will be further described in combination with examples and drawings, which are only used to explain the present application and do not constitute a limitation on the protection scope of the present application.

[0029] As Figs. 1-3The shown, working cylinder 1, mounting seat 2, pressing mechanism 3, leak detection mechanism 4, piston rod 11, top plate 21, bottom plate 22, column 23, universal joint sleeve 31, pressing cylinder 32, connecting block 33, connecting shaft 34, first spring 35, pressing head 36, pressing block 37, sealing ring 38, air inlet hole 39, leak detection cylinder sleeve 41, second spring 42, support pin 43, positioning sleeve 44, leak detection seat ring 45, conical surface 451, seat body 452, seat ring 453, notch 454;

[0030] A sealing test device for valve disc conical surface, comprising working cylinder 1, mounting seat 2, pressing mechanism 3 and leak detection mechanism 4; mounting seat 2 comprises top plate 21, bottom plate 22 and multiple columns 23, top plate 21, bottom plate 22 and multiple columns 23 are fixedly connected into a frame structure.

[0031] Working cylinder 1 is vertically fixed above mounting seat 2, the inside of mounting seat 2 is provided with a cavity, and the piston rod 11 of working cylinder 1 passes into the cavity from the top of mounting seat 2; pressing mechanism 3 is fixed at the end of piston rod 11 of working cylinder 1, and leak detection mechanism 4 is arranged at the bottom of mounting seat 2 and corresponds to the position of pressing mechanism 3;

[0032] Leak detection mechanism 4 comprises leak detection cylinder sleeve 41, second spring 42, support pin 43, positioning sleeve 44 and leak detection seat ring 45, leak detection cylinder sleeve 41 is fixed at the bottom of mounting seat 2, second spring 42 is supported in the inner hole of the lower end of leak detection cylinder sleeve 41, support pin 43 is supported on the upper end of second spring 42, support pin 43 is movably connected with the inner hole of the lower end of leak detection cylinder sleeve 41, positioning sleeve 44 is arranged in the upper end inner hole of leak detection cylinder sleeve 41, the upper end inner hole is communicated with the lower end inner hole, leak detection seat ring 45 is supported on the top of leak detection cylinder sleeve 41, the lower end of valve stem part passes through leak detection seat ring 45 and positioning sleeve 44 in turn, and is supported on support pin 43; during testing, the valve disc conical surface 451 of the valve head part is matched with the top of the inner hole of leak detection seat ring 45, the cavity between the valve head part, leak detection seat ring 45, leak detection cylinder sleeve 41 and positioning sleeve 44 forms an exhaust chamber, and one side of leak detection cylinder sleeve 41 is provided with an exhaust hole communicated with the exhaust chamber;

[0033] The inside of the pressing mechanism 3 is provided with an air inlet chamber, the air inlet chamber is provided with an air inlet hole 39 communicated with the outside, and the pressing mechanism 3 is used for applying pressure to the upper part of the valve;

[0034] The leak detection seat ring 45 is a split structure, which comprises a seat body 452 and a seat ring 453, the center of the seat body 452 is provided with a mounting groove, the bottom surface center of the mounting groove is provided with a through hole, the bottom surface of the mounting groove around the through hole hole mouth is provided with an annular groove, the seat ring 453 is a ring structure, the bottom of the seat ring 453 is provided with an annular protrusion corresponding to the annular groove, and the seat ring 453 is installed in the mounting groove.

[0035] In the present example, the pressing mechanism 3 comprises a universal joint sleeve 31, a pressing cylinder 32, a connecting block 33, a connecting shaft 34, a first spring 35 and a pressing head 36. The universal joint sleeve 31 is fixed at the end of the piston rod 11 of the working cylinder 1. The pressing cylinder 32 is fixed at the lower side of the universal joint sleeve 31. The pressing cylinder 32 is provided with an air inlet hole 39 at one side. The connecting block 33, the connecting shaft 34, the first spring 35 and the pressing head 36 are arranged in the air inlet chamber of the pressing cylinder 32. The upper end of the connecting block 33 is fixed at the top of the air inlet chamber of the pressing cylinder 32. The lower end of the connecting block 33 is fixedly connected with the upper end of the connecting shaft 34. The pressing head 36 is sleeved on the lower end of the connecting shaft 34 and movably connected with the lower end of the connecting shaft 34. The first spring 35 is sleeved on the connecting shaft 34 and fixedly connected with the connecting block 33 and the pressing head 36 at both ends.

[0036] In the present example, the edge of the mounting groove of the seat body 452 is provided with a notch 454. It should be noted that the notch 454 is provided to facilitate the removal of the seat ring 453.

[0037] In the present example, the bottom of the pressing cylinder 32 is provided with a sealing ring 38.

[0038] In the present example, the edge of the inner ring of the seat ring 453 is a tapered surface 451.

[0039] In the present example, the bottom of the leak detection cylinder sleeve 41 extends a positioning block.

[0040] In the present example, a sealing ring 38 is arranged between the leak detection seat ring 45 and the top of the leak detection cylinder sleeve 41.

[0041] In the present example, a sealing ring 38 is arranged between the seat ring 453 and the mounting groove.

[0042] Use instruction: connect the intake pipe and exhaust pipe (not shown in the figure) to the intake hole 39 of the compression cylinder 32 and the exhaust hole of the leak detection cylinder sleeve 41 respectively, and put the exhaust pipe into the water tank. During testing, first pass the lower end of the valve stem through the leak detection seat ring 45 and the positioning sleeve 44, and support it on the support pin 43 in the lower end hole of the leak detection cylinder sleeve 41, then start the working cylinder 1, the working cylinder 1 piston rod 11 drives the compression cylinder 32 to descend and press on the leak detection seat ring 45, at this time the pressure head 36 presses the valve head into the hole in the leak detection seat ring 45, the valve head valve disc conical surface 451 is inlaid with the conical surface 451 of the inner hole orifice edge of the seat ring 453, the first spring 35 and the second spring 42 are compressed, then fill compressed air with a pressure not less than 0.3Mpa into the compression cylinder 32 intake chamber through the intake hole 39 on one side of the compression cylinder 32, continuously ventilate for more than 3 seconds, observe whether there is air bubble coming out of the water tank connected with the exhaust hole, if there is air bubble coming out, the valve is unqualified, if there is no air bubble, it is qualified. After testing, stop ventilation, the working cylinder 1 drives the compression cylinder 32 to ascend, the first spring 35 returns, the valve automatically pops out under the action of the restoring force of the second spring 42, that is, the next valve can be tested.

[0043] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sealing test device for valve disc cone faces, characterized in that The utility model provides a kind of air leakage testing device for valve, including working cylinder, mounting seat, pressing mechanism and leak detection mechanism;Working cylinder is vertically fixed above mounting seat, the inside of mounting seat is equipped with chamber, the piston rod of working cylinder passes into chamber from the top of mounting seat;Pressing mechanism is fixed in the end of piston rod of working cylinder, and leak detection mechanism is arranged at the bottom of mounting seat, corresponding with the position of pressing mechanism; Leak detection mechanism includes leak detection cylinder sleeve, second spring, support pin, positioning sleeve and leak detection seat ring, leak detection cylinder sleeve is fixed at the bottom of mounting seat, second spring is supported in the inner hole of lower end of leak detection cylinder sleeve, support pin is supported on the upper end of second spring, support pin is movably connected with the inner hole of lower end of leak detection cylinder sleeve, positioning sleeve is arranged in the upper end inner hole of leak detection cylinder sleeve, and the upper end inner hole is communicated with the lower end inner hole, leak detection seat ring is supported on the top of leak detection cylinder sleeve, valve stem part lower end passes through leak detection seat ring and positioning sleeve in turn, is supported on support pin, when testing, valve head valve disc conical surface is consistent with the top of inner hole of leak detection seat ring, the cavity between valve head, leak detection seat ring, leak detection cylinder sleeve and positioning sleeve forms exhaust chamber, one side of leak detection cylinder sleeve is equipped with exhaust hole communicated with exhaust chamber; The inside of pressing mechanism is equipped with intake chamber, the intake chamber is equipped with intake hole communicated with outside, and the pressing mechanism is used to exert pressure on the top of valve; The leak detection seat ring is split type structure, which includes seat body and seat ring, the center of seat body is equipped with mounting slot, the bottom surface center of mounting slot is equipped with through hole, the bottom surface of mounting slot around through hole hole mouth is equipped with annular groove, the seat ring is ring structure, the bottom of seat ring is equipped with annular protrusion corresponding with annular groove, and the seat ring is installed in mounting slot.

2. A sealing test device for valve disc cone surfaces according to claim 1, characterized in that Pressing mechanism includes universal joint sleeve, pressing cylinder, connecting block, connecting shaft, first spring and pressure head, the universal joint sleeve is fixed in the end of piston rod of working cylinder, the pressing cylinder is fixed on the lower side of universal joint sleeve, one side of pressing cylinder is equipped with intake hole, connecting block, connecting shaft, first spring and pressure head are all arranged in the intake chamber of pressing cylinder, the upper end of connecting block is fixed on the top of intake chamber of pressing cylinder, the lower end of connecting block is fixed with the upper end of connecting shaft, the pressure head is sleeved on the lower end of connecting shaft and movably connected with the lower end of connecting shaft, and the first spring is sleeved on connecting shaft, and the two ends of first spring are fixed with connecting block and pressure head respectively.

3. A sealing test device for valve disc cone surfaces according to claim 2, characterized in that The edge of mounting slot slot mouth of seat body is equipped with notch, and the bottom of pressing cylinder is equipped with sealing ring.

4. A sealing test device for valve disc cone surfaces according to claim 1, characterized in that The inner side of seat ring is conical surface.

5. A sealing test device for valve disc cone surfaces according to claim 1, characterized in that The bottom of leak detection cylinder sleeve extends positioning block.

6. A sealing test device for valve disc cone surfaces according to claim 1, characterized in that Sealing ring is arranged between the top of leak detection seat ring and leak detection cylinder sleeve.

7. A sealing test device for valve disc cone surfaces according to claim 1, characterized in that Sealing ring is arranged between seat ring and mounting slot.

Images