Pump body shell leakproofness detection device and detection method

Abstract

The invention relates to the technical field of leakproofness detection equipment, in particular to a pump body shell leakproofness detection device, which comprises a detection main body, the pump body shell is arranged on the loading module, and the loading module is arranged in the detection main body; the two groups of automatic sealing modules are arranged in the detection main body, so that the two groups of automatic sealing modules respectively seal two side ports of the pump body shell; the manual sealing module is arranged at a top port of the pump body shell, the filling module comprises a water injection mechanism, an inflation mechanism and a selective exhaust mechanism, the water injection mechanism is arranged in the manual sealing module, the inflation mechanism is arranged in the manual sealing module, the selective exhaust mechanism is arranged in the manual sealing module, and the hot air module is arranged in the detection main body. The sealing process can be simplified, the detection efficiency is improved, defects existing in the water pump casting process can be found in time, and the leakproofness and the product quality of the water pump shell are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of airtightness detection equipment, and in particular to a pump housing airtightness detection device and a detection method. Background Art

[0002] A water pump is a machine that transfers the mechanical energy of the prime mover or other external energy to the liquid, increases the energy of the liquid, and realizes the transportation of liquid or pressurization of the liquid. A water pump usually includes a housing, an impeller mechanism rotatably arranged in the inner cavity of the housing, and a power mechanism fixedly arranged outside the housing and used to drive the impeller mechanism to rotate; the housing of the water pump is usually produced by casting, which is prone to casting defects that affect the normal use of the water pump. Therefore, it is necessary to conduct a tightness test on the housing of the water pump to ensure the product quality of the water pump.

[0003] In the existing method of testing the tightness of water pump casings, the inspectors first use a sealing plate to seal the three ports of the casing through a flange connection. Then, the inspectors inject a test liquid (usually colored water) into the inner cavity of the casing through a connection port preset on the sealing plate to form a certain water pressure. Finally, the inspectors observe whether there is water seepage on the outer wall of the casing to determine whether there is a leakage defect in the casing.

[0004] However, the process of sealing the three ports of the casing by the inspectors is rather cumbersome, resulting in low detection efficiency of the traditional water pump casing leakage detection method; therefore, further improvements can be made. Summary of the invention

[0005] In order to simplify the sealing process, improve detection efficiency, and ensure the airtightness of the water pump casing and product quality, the present application provides a pump casing airtightness detection device and detection method.

[0006] In the first aspect, the present application provides a pump shell airtightness detection device, including a detection body, the detection body is loaded with detection liquid, and the detection body is provided with an adjustment mechanism for adjusting the liquid level height of the detection liquid; a loading module, the pump shell is arranged in the loading module, the loading module is arranged in the detection body, and the loading module has the freedom of circular motion along the axial direction of the pump shell, so that the pump shell can move in a circle along its own axis; an automatic sealing module, the automatic sealing module is configured with two groups, the two groups of automatic sealing modules are both arranged in the detection body, and the two groups of automatic sealing modules have the freedom of translational motion along the axial direction of the pump shell, so that the two groups of automatic sealing modules The two side ports of the pump body shell are closed respectively; a manual sealing module, the manual sealing module is arranged at the top port of the pump body shell, so that the manual sealing module can close the top port of the pump body shell; a filling module, the filling module includes a water injection mechanism, an air charging mechanism and a selective exhaust mechanism, the water injection mechanism is arranged in the manual sealing module and is used to inject the detection liquid into the inner cavity of the pump body shell, the air charging mechanism is arranged in the manual sealing module and is used to rush the detection gas into the inner cavity of the pump body shell, the selective exhaust mechanism is arranged in the manual sealing module and is used to selectively exhaust the inner cavity of the pump body shell; a hot air module, the hot air module is arranged inside the detection body, and the hot air module faces the pump body shell.

[0007] Optionally, the automatic sealing module includes a sealed end cover, a sealing ring, a mounting column, a sealed airbag, an elastic telescopic mechanism, a translational motion mechanism and an inflation and deflation mechanism, the sealed end cover seals the two side ports of the pump body shell, the sealing ring is fixedly arranged on the four sides of the sealed end cover facing the pump body shell, the mounting column is fixedly arranged at the center of the side of the sealed end cover facing the pump body shell, the sealed airbag is fixedly arranged on the outer periphery of the mounting column, and the sealed airbag is clamped to the two side ports of the pump body shell in an inflated state, the inflation and deflation mechanism is fixedly arranged inside the detection body, the inflation and deflation mechanism is connected to the sealed airbag and is used to selectively inflate or deflate the sealed airbag; the translational motion mechanism is fixedly arranged inside the detection body, one end of the elastic telescopic mechanism is fixedly arranged at the output end of the translational motion mechanism, and the other end of the elastic telescopic mechanism is rotatably arranged at the center of the side of the sealed end cover away from the pump body shell.

[0008] Optionally, the elastic telescopic mechanism includes a first telescopic rod, a second telescopic rod and a telescopic spring, one end of the first telescopic rod is rotatably set at the center of the side of the closed end cover away from the pump body shell, the other end of the first telescopic rod is slidably set on the second telescopic rod, the telescopic spring is connected between the first telescopic rod and the second telescopic rod, and the second telescopic rod is fixedly set at the output end of the translational motion mechanism at one end away from the first telescopic rod.

[0009] Optionally, the loading module includes an arc slide rail, a loading base and a circular motion mechanism, the arc slide rail is fixedly arranged inside the detection body, the loading base is slidably arranged on the arc slide rail, the circular motion mechanism includes an arc rack, a waterproof motor and a spur gear, the arc rack is fixedly arranged on the arc slide rail, the waterproof motor is fixedly arranged on the loading base, the spur gear is fixedly arranged at the output end of the waterproof motor, and the spur gear is meshed with the arc rack.

[0010] Optionally, the manual sealing module includes a flange cover, a sealing ring and a locking mechanism, the flange cover is sealed on the top port of the pump body casing, the sealing ring is fixedly arranged on the four sides of the flange cover facing the pump body casing, the locking mechanism includes an L-shaped clip, a locking bolt and a contact piece, one end of the L-shaped clip is rotatably arranged on the flange cover, the locking bolt is threadedly connected to the end of the L-shaped clip away from the flange cover, and the contact piece is rotatably arranged on the locking bolt and pressed against the top port of the pump body casing.

[0011] Optionally, the water injection mechanism includes a water injection pump, a water injection pipe and a first one-way valve, the water injection pump is fixedly arranged inside the detection body, one end of the water injection pipe is connected to the manual sealing module, the other end of the water injection pipe is connected to the output end of the water injection pump, and the first one-way valve is fixedly arranged on the water injection pipe; the inflation mechanism includes an inflation pump, an inflation pipe and a second one-way valve, the inflation pump is fixedly arranged outside the detection body, one end of the inflation pipe is connected to the manual sealing module, the other end of the inflation pipe is connected to the output end of the inflation pump, and the second one-way valve is fixedly arranged on the inflation pipe; the selective exhaust mechanism includes an exhaust pipe, an air pipe switch and an exhaust valve, the exhaust pipe is connected to the manual sealing module, and the air pipe switch and the exhaust valve are fixedly arranged in series on the exhaust pipe.

[0012] Optionally, the hot air module includes a fan mechanism and an electric heating mechanism, wherein the fan mechanism is fixedly disposed inside the detection body and faces the pump body casing, and the electric heating mechanism is fixedly disposed inside the fan mechanism and is used to generate heat.

[0013] In a second aspect, the present application provides a method for detecting a pump housing tightness detection device, comprising the following steps: S1. Fix the pump housing to be tested on the loading module; S2. Close the top port of the pump housing through a manual sealing module; S3, sealing the ports on both sides of the pump housing through the automatic sealing module; S4. Use the adjusting mechanism to adjust the liquid level of the testing liquid to make the pump housing completely immersed in the testing liquid; S5. Inject test gas into the inner cavity of the pump shell through the inflation mechanism to form a positive pressure environment in the inner cavity of the pump shell. The test personnel observe whether the test liquid has bubbling to determine whether there is a leak in the pump shell; S6. Use the adjusting mechanism to adjust the liquid level of the testing liquid to lower it so that the pump housing is completely exposed to the testing liquid; S7, start the hot air module to blow air toward the pump housing, and use the loading module to drive the pump housing to move in a circular motion along its own axis, so that the detection liquid in the pump housing can be fully evaporated and dried; S8. Turn off the hot air module, and continue to use the loading module to drive the pump shell to perform circular motion along its own axis. Inject the test liquid into the inner cavity of the pump shell through the water injection mechanism to form a positive pressure environment in the inner cavity of the pump shell. The test personnel will observe whether the test liquid seeps water to determine whether there is a leakage defect in the pump shell.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: The automatic sealing module is used to mechanically and automatically seal the ports on both sides of the pump casing, which can simplify the sealing process and improve the detection efficiency. By performing air tightness detection and leakage detection in sequence, defects in the water pump casting process can be discovered in time to ensure the airtightness of the water pump casing and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of this application.

[0016] Figure 2 It is a longitudinal cross-sectional view of the overall structure of this application.

[0017] Figure 3 It is a transverse cross-sectional view of the overall structure of this application.

[0018] Figure 4 It is a schematic diagram of the location of the filling module in this application.

[0019] Figure 5 is a three-dimensional diagram of a filling module in this application.

[0020] Figure 6 It is a cross-sectional view of the automatic sealing module in this application.

[0021] Explanation of reference numerals: 1. Detection body; 11. Adjustment mechanism; 2. Loading module; 21. Circular slide rail; 22. Loading base; 23. Circular motion mechanism; 231. Arc rack; 232. Waterproof motor; 233. Spur gear; 3. Automatic sealing module; 31. Sealed end cover; 32. Sealing ring; 33. Mounting column; 34. Sealed airbag; 35. Elastic telescopic mechanism; 351. First telescopic rod; 352. Second telescopic rod; 353. Telescopic spring; 36. Translational motion mechanism; 37. Inflating and deflation mechanism; 4. Manual sealing module block; 41, flange cover; 42, sealing ring; 43, locking mechanism; 431, L-shaped buckle; 432, locking bolt; 433, contact piece; 5, filling module; 51, water injection mechanism; 511, water injection pump; 512, water injection pipe; 513, first one-way valve; 52, inflation mechanism; 521, inflation pump; 522, inflation pipe; 523, second one-way valve; 53, selective exhaust mechanism; 531, exhaust pipe; 532, air pipe switch; 533, exhaust valve; 6, hot air module; 61, fan mechanism; 62, electric heating mechanism. DETAILED DESCRIPTION

[0022] The following is combined with Figures 1 to 6 This application is described in further detail.

[0023] The application discloses a pump housing airtightness detection device.

[0024] Reference Figure 1-6The pump housing tightness detection device includes a detection body 1, a loading module 2, an automatic sealing module 3, a manual sealing module 4, a filling module 5 and a hot air module 6; wherein the detection body 1 is a water tank structure with an opening arranged upward, the detection body 1 is loaded with a detection liquid, and the detection body 1 is provided with an adjustment mechanism 11 for adjusting the liquid level height of the detection liquid; the loading module 2 is used to load the pump housing, specifically, the loading module 2 is provided with a stud according to the base of the pump housing, and the base of the pump housing is loaded and fixed by a nut, the loading module 2 is arranged inside the detection body 1, and the loading module 2 has a circular motion freedom along the axial direction of the pump housing, so that the pump housing can move in a circular motion along the axis of the pump housing itself under the drive of the loading module 2; the automatic sealing module 3 is configured with two groups, the two groups of automatic sealing modules 3 are both arranged inside the detection body 1, the two groups of automatic sealing modules 3 are respectively located on both sides of the pump housing, and the two groups of automatic sealing modules 3 have a translational motion freedom along the axial direction of the pump housing, so that the two groups of automatic sealing modules Module 3 can be synchronously moved close to the pump body shell and close the two side ports of the pump body shell respectively; the manual sealing module 4 is arranged at the top port of the pump body shell, and the manual sealing module 4 is detachably fixedly arranged at the top port of the pump body shell, so that the manual sealing module 4 can close the top port of the pump body shell; the filling module 5 includes a water injection mechanism 51, an inflation mechanism 52 and a selective exhaust mechanism 53, wherein the water injection mechanism 51 is arranged on the manual sealing module 4, and the water injection mechanism 51 can be used to inject detection liquid into the inner cavity of the pump body shell, the inflation mechanism 52 is arranged on the manual sealing module 4, and the inflation mechanism 52 is used to flush the detection gas into the inner cavity of the pump body shell, the selective exhaust mechanism 53 is arranged on the manual sealing module 4, and the selective exhaust mechanism 53 is used to selectively exhaust the inner cavity of the pump body shell according to the detection requirements of the detection personnel; the hot air module 6 is arranged inside the detection body 1, the hot air module 6 faces the pump body shell, and the hot air module 6 is used to selectively blow and dry the outer wall of the pump body shell according to the detection requirements of the detection personnel.

[0025] In the above, the adjusting mechanism 11 is used to adjust the liquid level height of the detection liquid inside the detection body 1. The adjusting mechanism 11 specifically includes a secondary water tank and a water pump. The secondary water tank is connected to the detection body 1 through the water pump. The detection liquid in the secondary water tank can be pumped into the detection body 1 / the detection liquid in the detection body 1 can be pumped into the secondary water tank by the water pump, so that the liquid level height of the detection liquid inside the detection body 1 can be adjusted.

[0026] In the above, the automatic sealing module 3 is used to seal the ports on both sides of the pump housing. The automatic sealing module 3 specifically includes a sealed end cover 31, a sealing ring 32, a mounting column 33, a sealed airbag 34, an elastic telescopic mechanism 35, a translational motion mechanism 36 and an inflation and deflation mechanism 37; wherein the sealed end cover 31 adopts a disc structure, and the sealed end cover 31 is adapted to the size of the ports on both sides of the pump housing. The sealed end cover 31 is driven by an external power to move to seal the ports on both sides of the pump housing, and the sealing ring The mounting column 32 is fixedly arranged around the side of the sealed end cover 31 facing the pump housing, thereby improving the sealing between the two side ports of the pump housing and the sealed end cover 31. The mounting column 33 is a cylindrical structure. The mounting column 33 is integrally formed and fixedly arranged at the center of the side of the sealed end cover 31 facing the pump housing, and the outer diameter of the mounting column 33 is smaller than the inner diameter of the two side ports of the pump housing, so that when the sealed end cover 31 is sealed on the two side ports of the pump housing, the mounting column 33 can extend into the inner cavity of the pump housing. The sealed airbag 34 is The rubber airbag of the cylindrical structure, the airtight airbag 34 is fixedly arranged on the periphery of the mounting column 33, the length of the airtight airbag 34 is adapted to the length of the mounting column 33, that is, the end of the airtight airbag 34 also extends into the inner cavity of the pump body shell, so that the airtight airbag 34 can be clamped on the two side ports of the pump body shell in the expanded state, the inflation and deflation mechanism 37 adopts the structure of the inflation pump 521 in the prior art, the inflation and deflation mechanism 37 is fixedly arranged inside the detection body 1, and the inflation and deflation mechanism 37 is connected to the airtight airbag 34 through a preset air pipe. Bag 34, and the inflation and deflation mechanism 37 is used to selectively inflate or deflate the sealed airbag 34; the translational motion mechanism 36 adopts the cylinder structure in the prior art, the translational motion mechanism 36 is fixedly arranged inside the detection body 1, one end of the elastic telescopic mechanism 35 is fixedly arranged at the output end of the translational motion mechanism 36, and the other end of the elastic telescopic mechanism 35 is rotatably arranged at the center of the side of the sealed end cover 31 away from the pump body shell, and the elastic telescopic mechanism 35, the translational motion mechanism 36, and the pump body shell are coaxially arranged.

[0027] The elastic telescopic mechanism 35 specifically includes a first telescopic rod 351, a second telescopic rod 352 and a telescopic spring 353; wherein, one end of the first telescopic rod 351 is rotatably set at the center of the side of the closed end cover 31 away from the pump body shell, and the other end of the first telescopic rod 351 is slidably set on the second telescopic rod 352. The telescopic spring 353 is a compression spring structure, and the telescopic spring 353 is connected between the first telescopic rod 351 and the second telescopic rod 352. The second telescopic rod 352 is fixedly set at the output end of the translational motion mechanism 36 at one end away from the first telescopic rod 351.

[0028] The specific actions of the two groups of automatic sealing modules 3 to seal the two side ports of the pump body shell are: first, the inflation and deflation mechanism 37 deflates and contracts the sealed airbag 34, and then the translational motion mechanism 36 drives the sealed end cover 31 to seal the two side ports of the pump body shell through the elastic telescopic mechanism 35, and the elastic telescopic mechanism 35 compresses and accumulates force so that the sealed end cover 31 forms a certain pressure on the sealing ring 32, and finally the inflation and deflation mechanism 37 inflates and expands the sealed airbag 34, so that the sealed airbag 34 can be clamped on the two side ports of the pump body shell in the expanded state, and finally the sealed airbag 34 and the sealing ring 32 cooperate with each other to realize the closing operation of the two side ports of the pump body shell.

[0029] In the above, the pump body shell can perform circular motion along the axis of the pump body shell itself under the drive of the loading module 2. The loading module 2 specifically includes an arc slide rail 21, a loading base 22 and a circular motion mechanism 23; wherein the arc slide rail 21 is a semi-circular ring structure, the arc slide rail 21 is coaxially arranged with the axis of the pump body shell, the arc slide rail 21 is fixedly arranged inside the detection body 1, the loading base 22 is slidably arranged on the arc slide rail 21, the circular motion mechanism 23 includes an arc rack 231, a waterproof motor 232 and a spur gear 233, the arc rack 231 is fixedly arranged on the arc slide rail 21, the waterproof motor 232 is fixedly arranged on the loading base 22, the waterproof motor 232 is powered by a battery, the spur gear 233 is fixedly arranged at the output end of the waterproof motor 232, and the spur gear 233 is meshed with the arc rack 231.

[0030] The specific action of the loading module 2 driving the pump shell to perform circular motion along the axis of the pump shell itself is that the waterproof motor 232 drives the spur gear 233 to rotate and mesh with the arc rack 231, thereby realizing the loading base 22 and the pump shell to perform circular motion along the axis of the pump shell itself synchronously.

[0031] In the above, the manual sealing module 4 can be used to close the top port of the pump body casing, and the manual sealing module 4 specifically includes a flange cover 41, a sealing ring 42 and a locking mechanism 43; wherein, the flange cover 41 adopts a disc structure, and the flange cover 41 is adapted to the size of the top port of the pump body casing, and the inspection personnel move the flange cover 41 to seal the top port of the pump body casing, and the sealing ring 42 is fixedly arranged on the four sides of the sealed end cover 31 facing the pump body casing, thereby improving the sealing between the top port of the pump body casing and the flange cover 41, and the locking mechanism 43 includes an L-shaped buckle 431, a locking bolt 432 and a contact piece 433, one end of the L-shaped buckle 431 is rotatably arranged on the outer periphery of the flange cover 41 through a preset rotating seat, and the fixed bolt is threadedly connected to the end of the L-shaped buckle 431 away from the flange cover 41, and the contact piece 433 is rotatably arranged on the locking bolt 432 and pressed against the top port of the pump body casing.

[0032] The specific action of the manual sealing module 4 to seal the top port of the pump housing is that the inspector moves the flange cover 41 to cover the top port of the pump housing, and the inspector turns the locking bolt 432 to make the contact piece 433 press against the top port of the pump housing. At this time, the sealing ring 42 is squeezed by the flange cover 41 and the top port of the pump housing, and finally the sealing is achieved.

[0033] In the above, the water injection mechanism 51 can be used to inject the detection liquid into the inner cavity of the pump body shell. The water injection mechanism 51 specifically includes a water injection pump 511, a water injection pipe 512 and a first one-way valve 513. The water injection pump 511 is fixedly arranged inside the detection body 1. One end of the water injection pipe 512 is connected to the manual sealing module 4, and the other end of the water injection pipe 512 is connected to the output end of the water injection pump 511. The first one-way valve 513 is fixedly arranged on the water injection pipe 512; the inflation mechanism 52 can be used to flush the detection gas into the inner cavity of the pump body shell. The inflation mechanism 52 specifically includes an inflation pump 521, an inflation pipe 522 and a second one-way valve 523. The inflation pump 521 is fixedly arranged at Outside the detection body 1, one end of the inflation tube 522 is connected to the manual sealing module 4, and the other end of the inflation tube 522 is connected to the output end of the inflation pump 521, and the second one-way valve 523 is fixedly arranged on the inflation tube 522; the selective exhaust mechanism 53 is used to selectively exhaust the inner cavity of the pump body shell according to the detection requirements of the detection personnel, and the selective exhaust mechanism 53 includes an exhaust pipe 531, an air pipe switch 532 and an exhaust valve 533. The exhaust pipe 531 is connected to the manual sealing module 4, and the air pipe switch 532 and the exhaust valve 533 both adopt the existing technical structure. The air pipe switch 532 and the exhaust valve 533 are fixedly arranged in series on the exhaust pipe 531.

[0034] By starting the water injection pump 511 / the air charging pump 521, it is possible to inject the test liquid / fill the test gas into the inner cavity of the pump body shell; during the process of injecting the test liquid, the air pipe switch 532 is opened to allow the excess air in the inner cavity of the pump body shell to be discharged through the exhaust valve 533, thereby improving the detection accuracy; during the process of filling the test gas, the air pipe switch 532 is closed to make the inner cavity of the pump body shell in a relatively closed state.

[0035] In the above, the hot air module 6 can selectively blow and dry the outer wall of the pump body shell according to the detection requirements of the detection personnel. The hot air module 6 specifically includes a fan mechanism 61 and an electric heating mechanism 62; wherein, the fan mechanism 61 is fixedly arranged inside the detection body 1 and facing the pump body shell, and the electric heating mechanism 62 uses an electric heating wire as a heating component, and the electric heating mechanism 62 is fixedly arranged inside the fan mechanism 61 and is used to generate heat.

[0036] By blowing the heat generated by the electric heating mechanism 62 toward the pump body shell through the fan mechanism 61, the outer wall of the pump body shell can be blown dry, thereby facilitating the determination of whether there is a water seepage defect in the pump body shell.

[0037] The present application also provides a method for detecting a pump housing airtightness detection device, which specifically comprises the following steps: S1. Fix the pump housing to be tested on the loading module 2 by means of nut locking; S2, sealing the top port of the pump housing through the manual sealing module 4; S3, sealing the ports on both sides of the pump housing through the automatic sealing module 3; S4, using the adjusting mechanism 11 to adjust the liquid level of the testing liquid to make the pump housing completely immersed in the testing liquid; S5. Inject test gas into the inner cavity of the pump housing through the inflation mechanism 52 to form a positive pressure environment in the inner cavity of the pump housing. The inspector observes whether the test liquid has bubbling to determine whether there is a gas leakage defect in the pump housing; S6, using the adjusting mechanism 11 to adjust the liquid level of the testing liquid to lower it so that the pump housing is completely exposed to the testing liquid; S7, start the hot air module 6 to blow air toward the pump housing, and use the loading module 2 to drive the pump housing to move in a circular motion along its own axis, so that the detection liquid in the pump housing can be fully evaporated and dried; S8. Turn off the hot air module 6, and continue to use the loading module 2 to drive the pump body shell to perform circular motion along its own axis. Inject the test liquid into the inner cavity of the pump body shell through the water injection mechanism 51 to form a positive pressure environment in the inner cavity of the pump body shell. The test personnel observe whether there is water seepage in the test liquid to determine whether there is a leakage defect in the pump body shell.

[0038] The automatic sealing module 3 is used to mechanically and automatically seal the ports on both sides of the pump body shell, which can simplify the sealing process and improve the detection efficiency. By performing air tightness detection and leakage detection in sequence, defects in the water pump casting process can be discovered in time to ensure the airtightness of the water pump shell and the product quality.

[0039] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pump housing tightness detection device, characterized in that: include A detection body (1), wherein the detection body (1) is loaded with detection liquid, and an adjustment mechanism (11) is provided inside the detection body (1) for adjusting the liquid level of the detection liquid; A loading module (2), wherein the pump housing is arranged on the loading module (2), the loading module (2) is arranged inside the detection body (1), and the loading module (2) has a degree of freedom of circular motion along the axis of the pump housing, so that the pump housing performs circular motion along its own axis; Automatic sealing modules (3), the automatic sealing modules (3) are configured in two groups, the two groups of automatic sealing modules (3) are both arranged inside the detection body (1), and the two groups of automatic sealing modules (3) have the freedom of translational movement along the axial direction of the pump shell, so that the two groups of automatic sealing modules (3) can respectively seal the ports on both sides of the pump shell; A manual sealing module (4), the manual sealing module (4) being arranged at the top port of the pump housing so that the manual sealing module (4) can seal the top port of the pump housing; A filling module (5), the filling module (5) comprising a water injection mechanism (51), an air charging mechanism (52) and a selective exhaust mechanism (53), the water injection mechanism (51) being arranged on the manual sealing module (4) and being used to inject a detection liquid into the inner cavity of the pump shell, the air charging mechanism (52) being arranged on the manual sealing module (4) and being used to flush a detection gas into the inner cavity of the pump shell, and the selective exhaust mechanism (53) being arranged on the manual sealing module (4) and being used to selectively exhaust the inner cavity of the pump shell; A hot air module (6), the hot air module (6) is arranged inside the detection body (1), and the hot air module (6) faces the pump body shell.

2. A pump housing tightness detection device according to claim 1, characterized in that: The automatic sealing module (3) comprises a sealed end cover (31), a sealing ring (32), a mounting column (33), a sealed airbag (34), an elastic telescopic mechanism (35), a translational motion mechanism (36) and an inflation and deflation mechanism (37), wherein the sealed end cover (31) seals the ports on both sides of the pump housing, the sealing ring (32) is fixedly arranged on the four sides of the sealed end cover (31) facing the pump housing, the mounting column (33) is fixedly arranged at the center of the sealed end cover (31) facing the pump housing, the sealed airbag (34) is fixedly arranged on the outer periphery of the mounting column (33), and the sealed airbag (34) is fixedly arranged on the outer periphery of the mounting column (33). The air-sealing bag (34) is clamped to the two side ports of the pump body shell in the expanded state, and the inflation and deflation mechanism (37) is fixedly arranged inside the detection body (1). The inflation and deflation mechanism (37) is connected to the air-sealing bag (34) and is used to selectively inflate or deflate the air-sealing bag (34); the translational motion mechanism (36) is fixedly arranged inside the detection body (1), one end of the elastic telescopic mechanism (35) is fixedly arranged at the output end of the translational motion mechanism (36), and the other end of the elastic telescopic mechanism (35) is rotatably arranged at the center of the side of the sealed end cover (31) away from the pump body shell.

3. A pump housing tightness detection device according to claim 2, characterized in that: The elastic telescopic mechanism (35) comprises a first telescopic rod (351), a second telescopic rod (352) and a telescopic spring (353); one end of the first telescopic rod (351) is rotatably arranged at the center of the side of the closed end cover (31) away from the pump body shell; the other end of the first telescopic rod (351) is slidably arranged on the second telescopic rod (352); the telescopic spring (353) is connected between the first telescopic rod (351) and the second telescopic rod (352); and one end of the second telescopic rod (352) away from the first telescopic rod (351) is fixedly arranged at the output end of the translational motion mechanism (36).

4. A pump housing tightness detection device according to claim 3, characterized in that: The loading module (2) comprises an arc slide rail (21), a loading base (22) and a circular motion mechanism (23); the arc slide rail (21) is fixedly arranged inside the detection body (1); the loading base (22) is slidably arranged on the arc slide rail (21); the circular motion mechanism (23) comprises an arc rack (231), a waterproof motor (232) and a spur gear (233); the arc rack (231) is fixedly arranged on the arc slide rail (21); the waterproof motor (232) is fixedly arranged on the loading base (22); the spur gear (233) is fixedly arranged on the output end of the waterproof motor (232); and the spur gear (233) is meshed with the arc rack (231).

5. A pump housing tightness detection device according to claim 1, characterized in that: The manual sealing module (4) comprises a flange cover (41), a sealing ring (42) and a locking mechanism (43); the flange cover (41) is sealed on the top port of the pump housing; the sealing ring (42) is fixedly arranged on the four sides of the flange cover (41) facing the pump housing; the locking mechanism (43) comprises an L-shaped buckle (431), a locking bolt (432) and a contact piece (433); one end of the L-shaped buckle (431) is rotatably arranged on the flange cover (41); the locking bolt (432) is threadedly connected to the end of the L-shaped buckle (431) away from the flange cover (41); and the contact piece (433) is rotatably arranged on the locking bolt (432) and pressed against the top port of the pump housing.

6. A pump housing tightness detection device according to claim 1, characterized in that: The water injection mechanism (51) comprises a water injection pump (511), a water injection pipe (512) and a first one-way valve (513); the water injection pump (511) is fixedly arranged inside the detection body (1); one end of the water injection pipe (512) is connected to the manual sealing module (4); the other end of the water injection pipe (512) is connected to the output end of the water injection pump (511); the first one-way valve (513) is fixedly arranged on the water injection pipe (512); the inflation mechanism (52) comprises an inflation pump (521), an inflation pipe (522) and a second one-way valve (523); the inflation pump (521) ) is fixedly arranged outside the detection body (1), one end of the inflation tube (522) is connected to the manual sealing module (4), the other end of the inflation tube (522) is connected to the output end of the inflation pump (521), and the second one-way valve (523) is fixedly arranged on the inflation tube (522); the selective exhaust mechanism (53) comprises an exhaust tube (531), an air tube switch (532) and an exhaust valve (533), the exhaust tube (531) is connected to the manual sealing module (4), and the air tube switch (532) and the exhaust valve (533) are fixedly arranged in series on the exhaust tube (531).

7. A pump housing tightness detection device according to claim 1, characterized in that: The hot air module (6) comprises a fan mechanism (61) and an electric heating mechanism (62); the fan mechanism (61) is fixedly arranged inside the detection body (1) and faces the pump body shell; the electric heating mechanism (62) is fixedly arranged inside the fan mechanism (61) and is used to generate heat.

8. A method for detecting a pump casing airtightness detection device, applied to the pump casing airtightness detection device according to any one of claims 1 to 7, characterized in that: The following steps are also included: S1. Fixing the pump housing to be inspected on the loading module (2); S2, sealing the top port of the pump housing by means of a manual sealing module (4); S3, sealing the ports on both sides of the pump housing through the automatic sealing module (3); S4, using the adjusting mechanism (11) to adjust the liquid level of the testing liquid to increase the height so that the pump housing is completely immersed in the testing liquid; S5. Injecting test gas into the inner cavity of the pump housing through the gas charging mechanism (52) to form a positive pressure environment in the inner cavity of the pump housing. The test personnel observe whether the test liquid has bubbling to determine whether there is a gas leakage defect in the pump housing; S6, using the adjusting mechanism (11) to adjust the liquid level of the testing liquid to a lower level so that the pump housing is completely exposed to the testing liquid; S7, starting the hot air module (6) to blow air toward the pump housing, and using the loading module (2) to drive the pump housing to move in a circular motion along its own axis, so that the detection liquid in the pump housing can be fully evaporated and dried; S8. Turn off the hot air module (6), and continue to use the loading module (2) to drive the pump shell to move in a circular motion along its own axis. Inject the test liquid into the inner cavity of the pump shell through the water injection mechanism (51) to form a positive pressure environment in the inner cavity of the pump shell. The test personnel observe whether the test liquid seeps water to determine whether the pump shell has a leakage defect.

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