Automatic air tightness detection device for pump body

Abstract

The utility model relates to the technical field of air tightness detection, in particular to an automatic air tightness detection device for a pump body. The air tightness detection device comprises a workbench and an air tightness detector mounted on the workbench, a mounting plate is arranged on the workbench, a clamp bottom plate is detachably connected to the mounting plate, a clamp air pipe communicated with the air tightness detector is arranged on the clamp bottom plate, and a ventilation air cylinder is arranged beside the clamp air pipe. The movable end of the ventilation cylinder is connected with a sealing member which can be in sealing connection with the inner wall of the air inlet of the to-be-detected pump body, one end of the sealing member is in sealing communication with the clamp air pipe, and the other end is in sealing communication with an inner cavity at the air inlet of the to-be-detected pump body. The clamp bottom plate is further provided with a plurality of plugging mechanisms capable of plugging other through holes, except the air inlet, in the pump body to be detected. After the prior art is improved, the fixture can be detached and replaced, the air tightness detector is reused, the cost is reduced, and the air tightness detector is suitable for detecting a pump body with multiple through holes and an uneven surface.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to an automatic air tightness detection device for a pump body. Background Art

[0002] A water pump is a machine that transports liquids or pressurizes liquids. It transfers the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali liquids, emulsions, suspensions and liquid metals, etc. It can also transport liquid and gas mixtures and liquids containing suspended solids. During the operation of the water pump, if the sealing performance and effect of the water pump are not good, the water pump cannot pressurize or transport the liquid or gas, which not only seriously affects the safe operation of the water supply system, but also easily causes a large amount of waste of manpower and financial resources.

[0003] In view of this, a Chinese patent document with the authorization number CN210037108U discloses an automatic airtightness test tool for a water pump, comprising a lower base and an upper base, an airtightness tester is provided at one end of the top of the lower base, a pressure probe is provided on one side of the airtightness tester, and a lifting cylinder is provided on one side of the airtightness tester, a first telescopic rod is provided at the output end of the lifting cylinder, a support plate is provided at the top end of the first telescopic rod, a water pump to be tested is provided at the top center of the support plate, an air inlet is provided on one side of the water pump to be tested, a sealing flange is provided on the outer wall of the air inlet, a clamping cylinder is provided at the top of the upper base, a second telescopic rod is provided at the output end of the clamping cylinder, a clamping assembly is provided at the bottom end of the second telescopic rod, and the pressure probe is connected to the air outlet on one side of the water pump to be tested through an air connection pipe; the above automatic airtightness test tool for a water pump has the following problems:

[0004] 1. When different types of pump bodies need to be tested, the entire tooling, including the air tightness tester, needs to be replaced, which is costly.

[0005] 2. It is only applicable to water pumps with only one air inlet and one air outlet. When there are many through holes in the pump body, the pump cavity cannot be sealed and the detection cannot be completed.

[0006] 3. The pump body is fixed by pressing the clamping plate and the support plate together, which requires a high degree of flatness on the surface of the pump body, otherwise the stability will be poor.

[0007] Therefore, it is necessary to improve the deficiencies in the above prior art. Summary of the invention

[0008] The technical problem to be solved by the utility model is to provide an automatic airtightness detection device for a pump body in view of the above-mentioned deficiencies in the prior art, so as to solve the problems in the prior art that the entire tooling is expensive to replace and is not suitable for a pump body with many through holes and an uneven surface.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic air tightness detection device for a pump body, comprising a workbench and an air tightness detector installed on the workbench, the workbench is provided with a mounting plate, the mounting plate is detachably connected with a fixture base plate, the fixture base plate is provided with a fixture air pipe connected to the air tightness detector, a ventilation cylinder is provided next to the fixture air pipe, the movable end of the ventilation cylinder is connected with a sealing member that can be sealingly connected to the inner wall of the air inlet of the pump body to be tested, one end of the sealing member is sealingly connected to the fixture air pipe, and the other end is sealingly connected to the inner cavity at the air inlet of the pump body to be tested, and a plurality of sealing mechanisms that can block other through holes on the pump body to be tested except the air inlet are also installed on the fixture base plate.

[0010] By adopting the above technical solution, when it is necessary to inspect different types of pump bodies, through the detachable connection between the fixture base plate and the mounting plate on the workbench, it is only necessary to remove the fixture and replace and install the corresponding fixture on the mounting plate. There is no need to replace the air tightness tester, which saves costs; multiple sealing mechanisms together with seals can seal multiple through holes on the pump body to be inspected to form a sealed cavity, which is suitable for the inspection of multi-through-hole pump bodies.

[0011] The above technical solution is further configured as follows: a first air hole sealably connected to the air nozzle of the air tightness detector is provided on the mounting plate, a second air hole sealably connected to the first air hole is provided on the fixture bottom plate, the fixture air pipe is sealably connected to the second air hole at one end away from the sealing member, a plurality of first internal threaded holes are provided on the mounting plate in the circumferential direction of the first air hole, a first mounting through hole matching the position of the first internal threaded hole is provided on the fixture bottom plate, and the mounting plate and the fixture bottom plate are fastened together by bolts.

[0012] By adopting the above technical scheme, the air nozzle of the air tightness tester is sealedly connected to the fixture air pipe through the first air hole on the mounting plate and the second air hole on the fixture bottom plate, so that air is filled into the inner cavity of the pump body for testing; when the fixture needs to be replaced, after removing the bolts, remove the fixture bottom plate together with the fixture, replace it with a new fixture, and re-tighten the connection with the bolts so that the second air hole on the fixture bottom plate of the new fixture is sealedly connected to the first air hole to detect another pump body.

[0013] The above technical solution is further configured as follows: a T-slot is provided on the mounting plate, and a plurality of second internal threaded holes corresponding to the positions of the T-slot are provided on the fixture bottom plate, and the second internal threaded holes are threadedly connected with limiting bolts, and the nuts of the limiting bolts are inserted into the T-slots.

[0014] By adopting the above technical solution, the nut of the limit bolt is slid and clamped into the T-slot, thereby improving the stability between the clamp base plate and the mounting plate.

[0015] The above technical solution is further configured as follows: the blocking mechanism comprises a blocking cylinder mounted on a bottom plate of the fixture, and a sealing gasket is provided at a movable end of the blocking cylinder which can seal and abut against a corresponding through hole on the pump body to be tested.

[0016] By adopting the above technical solution, when the inspection of the pump body begins, the sealing cylinder is controlled so that its movable end drives the sealing gasket to approach the corresponding through hole on the pump body to be inspected until it abuts and seals, thereby preventing air leakage from the through hole; when the inspection is completed, the sealing cylinder is controlled so that its movable end drives the sealing gasket away from the corresponding through hole on the pump body to be inspected, so as to facilitate the removal of the pump body.

[0017] The above technical solution is further configured as follows: a plurality of limit columns are provided on the bottom plate of the clamp, a limit protrusion is provided on the upper end of the limit column, and the limit protrusion is inserted into the mounting hole corresponding to the lower end of the pump body to be tested; a lever cylinder is also provided on the bottom plate of the clamp, and the movable end of the lever cylinder can abut against the upper end of the pump body to be tested.

[0018] By adopting the above technical solution, the limiting protrusion of the limiting column is inserted into the mounting hole corresponding to the lower end of the pump body to be tested, thereby limiting the lower end of the pump body; the lever cylinder can control its movable end to press the upper end of the pump body to be tested, so that the pump body to be tested is stabilized on the bottom plate of the fixture. By limiting the local point position of the pump body to be tested, it has high flexibility and can be applicable to pump bodies of various shapes.

[0019] The above technical solution is further configured as follows: a sleeve ring is provided at one end of the seal close to the air inlet of the pump body to be tested, the outer wall of the sleeve ring is gap-matched with the inner wall of the air inlet of the pump body to be tested, the radial side of the seal can be sealed and abutted with the side of the air inlet of the pump body to be tested, and a ventilation pipe is provided inside the seal, one end port of the ventilation pipe is located at the center of the sleeve ring, and the other end port is located on the circumferential side of the seal and is sealed and connected with the fixture air pipe.

[0020] By adopting the above technical solution, the sleeve ring can locate and further limit the air inlet of the pump body to be tested, and the seal is connected to the inner cavity of the pump body to be tested and the fixture air pipe through the ventilation pipe, and then connected to the air tightness tester.

[0021] The above technical solution is further configured as follows: the workbench is provided with an on button for controlling the detection on, and a off button for controlling the detection off.

[0022] By adopting the above technical scheme, after the pump body to be inspected is placed on the limit column, the open button is pressed to control the active ends of the ventilation cylinder, the sealing cylinder and the lever cylinder to be close to the pump body to be inspected, and the pump body to be inspected is clamped and sealed and then ventilated; after the inspection is completed, the close button is pressed and the active ends of the ventilation cylinder, the sealing cylinder and the lever cylinder are away from the pump body to be inspected, and the inspected pump body can be removed.

[0023] The beneficial effects achieved by the utility model are that the fixture can be disassembled and replaced, the reuse of the air tightness detector reduces the cost, and the utility model is suitable for the detection of pump bodies with multiple through holes and uneven surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the working table in the embodiment of the utility model in a state where no fixture is installed;

[0026] Figure 3 yes Figure 2 A local attempt at the center A;

[0027] Figure 4 It is a structural schematic diagram of the clamp in the embodiment of the utility model;

[0028] Figure 5 It is a structural schematic diagram of the clamp bottom plate in the embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the sealing member in the embodiment of the utility model;

[0030] Figure 7 It is a schematic diagram of the structure of the pump body to be detected in the embodiment of the utility model. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-7As shown in, an automatic air tightness detection device for a pump body comprises a workbench 1, an air tightness detector 2 installed on the workbench 1, a mounting plate 3 is provided on the workbench 1, a fixture bottom plate 4 is detachably connected to the mounting plate 3, a fixture air pipe 5 connected to the air tightness detector 2 is provided on the fixture bottom plate 4, a ventilation cylinder 6 is provided next to the fixture air pipe 5, a sealing member 8 which can be sealingly connected to the inner wall of the air inlet 70 of the pump body 7 to be detected is connected to the movable end of the ventilation cylinder 6, one end of the sealing member 8 is sealingly connected to the fixture air pipe 5, and the other end is sealingly connected to the inner cavity at the air inlet 70 of the pump body 7 to be detected, a plurality of blocking mechanisms 9 which can block other through holes on the pump body 7 to be detected except the air inlet are also installed on the fixture bottom plate 4, a sealing member 9 which can be sealingly connected to the air nozzle of the air tightness detector 2 is provided on the mounting plate 3 A first air hole 30, a second air hole 40 sealed and connected to the first air hole 30 is provided on the clamp base plate 4, and one end of the clamp air pipe 5 away from the sealing member 8 is sealed and connected to the second air hole 40, and a plurality of first internal threaded holes 31 are provided on the mounting plate 3 in the circumferential direction of the first air hole 30, and a first mounting through hole 41 matching the position of the first internal threaded hole 31 is provided on the clamp base plate 4, and the mounting plate 3 and the clamp base plate 4 are fastened together by bolts (not shown in the figure), and a T-slot 32 is provided on the mounting plate 3, and a plurality of second internal threaded holes 42 corresponding to the position of the T-slot 32 are provided on the clamp base plate 4, and the second internal threaded hole 42 is threadedly connected to a limiting bolt (not shown in the figure), and the nut of the limiting bolt is inserted into the T-slot 32 to limit the clamp base plate, thereby improving the stability between the mounting plate 3 and the clamp base plate 4.

[0033] The blocking mechanism 9 comprises a blocking cylinder 91 mounted on the fixture bottom plate 4 , and a sealing gasket 92 capable of sealingly abutting against a corresponding through hole on the pump body 7 to be inspected is disposed at a movable end of the blocking cylinder 91 .

[0034] A plurality of limit columns 43 are also provided on the fixture base plate 4, and a limit protrusion 431 is provided on the upper end of the limit column 43. The limit protrusion 431 is inserted into the mounting hole 71 corresponding to the lower end of the pump body 7 to be tested. A lever cylinder 44 is also provided on the fixture base plate 4, and the movable end of the lever cylinder 44 can abut against the upper end of the pump body 7 to be tested.

[0035] A sleeve ring 81 is provided at one end of the sealing member 8 close to the air inlet 70 of the pump body 7 to be tested, and the outer wall of the sleeve ring 81 is gap-matched with the inner wall of the air inlet 70 of the pump body 7 to be tested. The radial side of the sealing member 8 can be sealed and abutted against the side of the air inlet 70 of the pump body 7 to be tested, and a ventilation pipe 80 is provided inside the sealing member 8. One end of the ventilation pipe 80 is located at the center of the sleeve ring 81, and the other end is located on the circumferential side of the sealing member 8 and is sealed and connected with the fixture air pipe 5.

[0036] The workbench 1 is provided with an on button 11 for controlling the detection on, and a off button 12 for controlling the detection off.

[0037] In the above embodiment, when it is necessary to detect different types of pump bodies, through the detachable connection between the fixture base plate 4 and the mounting plate 3 on the workbench 1, it is only necessary to remove the fixture and replace and install the corresponding fixture on the mounting plate 3. There is no need to replace the air tightness tester 2, which saves costs; the sealing cylinders 91 of multiple sealing mechanisms 9 drive the sealing gaskets 92 together with the seal 8 to seal multiple through holes on the pump body 7 to be detected to form a sealed cavity, which is suitable for the detection of multi-through-hole pump bodies; the limiting protrusion 431 of the limiting column 43 is inserted into the mounting hole 71 corresponding to the lower end of the pump body 7 to be detected, thereby limiting the lower end of the pump body, and the lever cylinder 44 can control its active end to press the upper end of the pump body 7 to be detected, so that the pump body 7 to be detected is stabilized on the fixture base plate 4, and the local point position of the pump body 7 to be detected is limited, so it has high flexibility and can be applicable to pump bodies of various shapes.

Claims

1. An automatic air tightness detection device for a pump body, comprising a workbench and an air tightness detector installed on the workbench, characterized in that: The workbench is provided with a mounting plate, to which a fixture base plate is detachably connected, a fixture air pipe connected to an air tightness tester is provided on the fixture base plate, a ventilation cylinder is provided next to the fixture air pipe, a movable end of the ventilation cylinder is connected with a sealing member that can be sealingly connected to the inner wall of the air inlet of the pump body to be tested, one end of the sealing member is sealingly connected to the fixture air pipe, and the other end is sealingly connected to the inner cavity at the air inlet of the pump body to be tested, and a plurality of sealing mechanisms that can seal other through holes on the pump body to be tested except the air inlet are also installed on the fixture base plate.

2. The automatic airtightness detection device for a pump body according to claim 1, characterized in that: The mounting plate is provided with a first air hole which is sealably connected to the air nozzle of the air tightness detector, the fixture bottom plate is provided with a second air hole which is sealably connected to the first air hole, the fixture air pipe is sealably connected to the second air hole at one end away from the sealing member, the mounting plate is provided with a plurality of first internal threaded holes in the circumference of the first air hole, the fixture bottom plate is provided with a first mounting through hole which matches the position of the first internal threaded hole, and the mounting plate and the fixture bottom plate are fastened together by bolts.

3. The automatic airtightness detection device for a pump body according to claim 2, characterized in that: The mounting plate is provided with a T-shaped slot, and the fixture bottom plate is provided with a plurality of second internal threaded holes corresponding to the positions of the T-shaped slots. The second internal threaded holes are threadedly connected with limiting bolts, and the nuts of the limiting bolts are inserted into the T-shaped slots.

4. The automatic airtightness detection device for a pump body according to any one of claims 1 to 3, characterized in that: The blocking mechanism comprises a blocking cylinder mounted on a bottom plate of the fixture, and a sealing gasket is provided at a movable end of the blocking cylinder which can be in sealing contact with a corresponding through hole on a pump body to be tested.

5. The automatic airtightness detection device for a pump body according to claim 4, characterized in that: A plurality of limit columns are also provided on the bottom plate of the clamp, and a limit protrusion is provided on the upper end of the limit column. The limit protrusion is inserted into the mounting hole corresponding to the lower end of the pump body to be tested. A lever cylinder is also provided on the bottom plate of the clamp, and the movable end of the lever cylinder can abut against the upper end of the pump body to be tested.

6. The automatic airtightness detection device for a pump body according to claim 5, characterized in that: The sealing member is provided with a sleeve ring at one end close to the air inlet of the pump body to be tested, and the outer wall of the sleeve ring is gap-matched with the inner wall of the air inlet of the pump body to be tested. The radial side of the sealing member can be sealed and abutted with the side of the air inlet of the pump body to be tested. A ventilation pipe is provided inside the sealing member, and one end of the ventilation pipe is located at the center of the sleeve ring, and the other end is located on the circumferential side of the sealing member and is sealed and connected with the fixture air pipe.

7. The automatic airtightness detection device for a pump body according to claim 6, characterized in that: The workbench is provided with an on button for controlling the detection on, and a off button for controlling the detection off.

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