Mechanical seal detection device

Abstract

The utility model provides a mechanical seal detection device. The mechanical seal detection device comprises a supporting base; the sealing bottom pad is arranged at the top of the supporting base; the gas transmission through hole is formed in the sealing bottom pad; the gas transmission device is arranged in the supporting base and communicated to the gas transmission through hole; the lifting device is arranged at the top of the supporting base and used for driving the lifting pressing block to do lifting motion above the sealing bottom pad; the containing inner cavity is formed in the bottom of the lifting pressing block; the clamping device is mounted on the lifting pressing block and is used for driving a clamping piece to reciprocate relative to the inner side wall of the accommodating inner cavity in the accommodating inner cavity so as to clamp or loosen the to-be-tested mechanical sealing piece in the accommodating inner cavity through the clamping piece; when the to-be-tested mechanical sealing element is clamped in the accommodating inner cavity, the lifting device drives the lifting pressing block to descend so that the bottom end face of the to-be-tested mechanical sealing element can be pressed and sealed on the sealing bottom pad, and a bottom end opening formed in the bottom end face can be matched with the gas transmission through hole in an aligned mode. The gas transmission device can transmit gas into the to-be-detected mechanical sealing element through the bottom end opening so as to detect the mechanical sealing performance of the to-be-detected mechanical sealing element.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seal detection, in particular to a mechanical seal detection device. Background Art

[0002] For rotating fluid mechanical equipment such as centrifugal pumps, centrifuges, reactors and compressors, since the transmission shaft runs through the inside and outside of the equipment, there is a circumferential gap between the transmission shaft and the equipment, so that the fluid medium in the equipment can leak out through the circumferential gap; if the internal pressure of the equipment is lower than the atmospheric pressure, the outside air will leak into the equipment. Therefore, this type of equipment needs to have a shaft seal (shaft seal) device that can prevent leakage at the circumferential gap between the transmission shaft and the equipment. There are many types of shaft seal devices, and among them, mechanical seal devices have the advantages of less leakage and long life, becoming a widely used and very important shaft seal device. Mechanical seals are also called end face seals. Mechanical seals refer to devices that prevent fluid leakage by at least one pair of end faces perpendicular to the axis of rotation, which are kept in close contact and relatively slidable under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of auxiliary seals. Therefore, regular sealing (air tightness) testing of the mechanical sealing components of the mechanical sealing device used to achieve shaft sealing (such as the mechanical sealing components of the centrifugal pump) is an important part of achieving quality control and improving the efficiency of the mechanical seals of rotating fluid equipment.

[0003] When the existing mechanical seal detection device seals and docks the mechanical seal to be tested on the detection device to perform the mechanical seal detection operation, it is necessary to assemble a variety of specific spare parts that match the mechanical seal to be tested to assist in completing the sealing docking of the mechanical seal to be tested, resulting in cumbersome docking and installation operations between the mechanical seal to be tested and the detection device, affecting the mechanical seal detection efficiency and increasing the cost of the detection device; at the same time, the specific spare parts limit the versatility of the mechanical seal detection device in detecting mechanical seal components of different types and specifications, which also increases the cost of mechanical seal detection. Utility Model Content

[0004] The utility model provides a mechanical seal detection device to solve the technical problems in the prior art of complicated sealing docking and installation operation between the mechanical seal detection device and the mechanical seal to be detected and low detection efficiency.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] The utility model provides a mechanical seal detection device, comprising:

[0007] Support base;

[0008] A sealing bottom pad is arranged on the top of the supporting base; a gas transmission through hole is arranged on the sealing bottom pad;

[0009] The gas transmission device is arranged inside the support base and connected to the gas transmission through hole;

[0010] A lifting device is arranged on the top of the supporting base and is used to drive the lifting and lowering pressure block to move upward and downward above the sealing bottom pad;

[0011] The accommodating inner cavity is arranged at the bottom of the lifting and lowering pressure block; the clamping device is installed on the lifting and lowering pressure block and is used to drive the clamping member to reciprocate in the accommodating inner cavity relative to the inner wall of the accommodating inner cavity, so as to clamp or loosen the mechanical seal to be tested in the accommodating inner cavity through the clamping member;

[0012] When the mechanical seal to be tested is clamped in the accommodating inner cavity, the lifting device drives the lifting and lowering pressure block to descend, which can press the bottom end surface of the mechanical seal to be tested to seal it on the sealing bottom pad, and make the bottom end opening arranged on the bottom end surface align with the gas supply through hole. The gas supply device can supply gas to the inside of the mechanical seal to be tested through the bottom end opening to detect the mechanical sealing of the mechanical seal to be tested.

[0013] Preferably, the clamping device comprises:

[0014] A transmission screw is rotatably arranged on the lifting and lowering block, one end of the transmission screw extends to the outside of the lifting and lowering block, and the other end of the transmission screw extends into the accommodating inner cavity;

[0015] The toggle knob is installed at the end of the transmission screw extending to the outside of the lifting and lowering pressure block;

[0016] The driven nut can be movably installed on the part of the driving screw located in the accommodating inner cavity along the axial direction of the driving screw, and the clamping piece is installed on the driven nut.

[0017] Preferably, a screw bearing is provided on the inner side wall of the accommodating cavity opposite to the dial knob, and the other end of the transmission screw is rotatably mounted on the screw bearing.

[0018] Preferably, the outer side surfaces at both axial ends of the transmission screw are provided with a pair of external threads with opposite rotation directions, and a pair of driven nuts are respectively threadedly connected to the pair of external threads with opposite rotation directions;

[0019] When the driving screw rotates forward and reversely, it can drive a pair of driven nuts to move toward or in reverse along the axial direction of the driving screw, thereby driving a pair of clamping members to clamp or loosen the mechanical seal to be tested in the accommodating inner cavity.

[0020] Preferably, the lifting device comprises:

[0021] A mounting bracket is disposed on the top of the support base and extends above the sealing base pad;

[0022] The lifting mechanism is arranged on the mounting bracket and is used for driving the lifting pressure block to move upward and downward above the sealing bottom pad.

[0023] Preferably, the lifting mechanism is a lifting cylinder, and the lifting pressure block is fixedly mounted on a telescopic rod of the lifting cylinder that can move upward and downward.

[0024] Preferably, the mounting bracket comprises:

[0025] Install the column on the top of the support base;

[0026] Mounting boom, mounted on mounting posts and extending above sealing pad;

[0027] The lifting cylinder is installed on the top of the mounting cantilever. The mounting cantilever is provided with a clearance hole matching the telescopic rod. The telescopic rod is inserted into the clearance hole to drive the lifting and lowering pressure block to move up and down between the mounting cantilever and the sealing bottom pad.

[0028] Preferably, the gas delivery device comprises:

[0029] An air inlet pipe is arranged on one side of the supporting base;

[0030] The air pump is arranged inside the supporting base and is connected to the air inlet pipe and the air delivery hole through the air inlet channel and the air delivery channel respectively;

[0031] The external air source can be delivered to the interior of the mechanical seal to be tested by an air pump through an air inlet pipe.

[0032] Furthermore, the gas delivery device further comprises:

[0033] The pressure detection device is installed on the gas transmission channel and is used to detect the pressure inside the mechanical seal to be tested.

[0034] Preferably, the sealing base gasket is a sealing rubber gasket, and the top of the supporting base is provided with a mounting groove matching the shape of the sealing rubber gasket, the sealing rubber gasket is embedded in the mounting groove, the diameter of the gas transmission hole is less than or equal to the diameter of the bottom opening, and the gas transmission channel runs through to the bottom of the mounting groove and matches the gas transmission hole.

[0035] Compared with the prior art, the utility model has the following beneficial effects:

[0036] The mechanical seal detection device provided by the utility model can quickly and conveniently clamp or loosen the mechanical seal to be tested (such as the mechanical seal component of a centrifugal pump) in the accommodating inner cavity at the bottom of the lifting and lowering pressure block through the clamping member, and then drive the lifting and lowering pressure block to descend relative to the sealing bottom gasket by the lifting device, so that the bottom end surface of the mechanical seal to be tested (such as the end surface of the mechanical seal component of the centrifugal pump used to seal the circumferential gap between the transmission shaft of the centrifugal pump and the pump body) can be pressed and sealed to the sealing bottom gasket, and the bottom end opening arranged on the bottom end surface of the mechanical seal to be tested is aligned with the gas transmission through hole, so as to quickly realize the sealed docking between the mechanical seal to be tested and the mechanical seal detection device. At this time, the gas transmission device can transmit gas to the inside of the mechanical seal to be tested through the bottom end opening to form a gas pressure of a specified value inside the mechanical seal to be tested. After keeping the mechanical seal to be tested pressed downward for a certain preset time, the central control device can accurately calculate the specific value representing the mechanical sealing (air tightness) of the mechanical seal to be tested.

[0037] Therefore, the mechanical seal detection device provided by the utility model can complete the sealing docking between the mechanical seal to be tested and the mechanical seal detection device without assembling multiple specific parts and components that match the mechanical seal to be tested, thereby simplifying the sealing docking installation operation of the mechanical seal to be tested and improving the efficiency of the mechanical seal detection operation.

[0038] At the same time, the clamping parts of the mechanical seal detection device provided by the utility model can perform adaptive movement adjustment on mechanical seal components of different types and sizes, so that the clamping device can adapt to clamp mechanical seal components of different types and sizes, avoiding the limitation on the universality of detection of the mechanical seals to be tested caused by the traditional mechanical seal detection device that uses multiple specific spare parts corresponding to a single type and size, while improving the universality of mechanical seal detection of the mechanical seal detection device and reducing the cost of mechanical seal detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solution proposed by the utility model, the utility model is described in detail in combination with the embodiments and drawings. It should be understood that the embodiments and drawings described in the following specific implementation methods and the drawings in the specification are only some embodiments of the utility model, and for ordinary technicians in this field, these drawings can be changed under the concept of the utility model.

[0040] Figure 1 A three-dimensional schematic diagram of the overall assembly structure of an embodiment of a mechanical seal detection device provided by the utility model;

[0041] Figure 2 for Figure 1 A front view of the cross-sectional structure of the support base of the mechanical seal detection device along the AA direction;

[0042] Figure 3 for Figure 1 A top view of the cross-sectional structure of the support base of the mechanical seal detection device along the BB direction;

[0043] Figure 4 for Figure 1 A side view of the cross-sectional structure of the lifting and lowering pressure block of the mechanical seal detection device along the CC direction.

[0044] Among them, the main marks of the drawings in the figure are as follows:

[0045] 1. Support base; 11. Mounting groove; 12. Threaded mounting hole; 2. Sealing base pad; 21. Gas delivery hole; 3. Gas delivery device; 31. Air pump; 32. Inlet pipe; 33. Gas delivery channel; 4. Lifting device; 41. Mounting bracket; 411. Mounting column; 412. Mounting cantilever; 413. Make way hole; 42. Lifting mechanism; 5. Lifting block; 51. Accommodating inner cavity; 511. Inner cavity opening; 512. Inner wall; 513. Guide groove; 6. Clamping device; 61. Drive screw; 611. External thread; 62. Toggle knob; 63. Driven nut; 64. Clamping piece; 7. Pressure detection device; 8. Central control device; 81. Control panel; 82. Control mainboard; 9. Base pad; 91. Adjusting screw. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figure 1-4 And embodiments, the utility model is further described in detail.

[0047] Please also read Figure 1-4 The mechanical seal detection device provided by the utility model comprises:

[0048] A support base 1; a sealing base pad 2, arranged at the top of the support base 1; a gas delivery hole 21, which is arranged through the sealing base pad 2; a gas delivery device 3, which is arranged inside the support base 1 and connected to the gas delivery hole 21 through a gas channel; a lifting device 4, which is arranged at the top of the support base 1 and is used to drive the lifting and lowering block 5 to move up and down above the sealing base pad 2; a containing inner cavity 51, which is arranged at the bottom of the lifting and lowering block 5, and the containing inner cavity 51 forms an inner cavity opening 511 at the bottom of the lifting and lowering block 5 that connects the containing inner cavity 51 and the outside of the lifting and lowering block 5; a clamping device 6, which is installed on the lifting and lowering block 5, and is used to drive the clamping member 64 to reciprocate in the containing inner cavity 51 relatively close to or away from the inner side wall 512 of the containing inner cavity 51, so as to clamp or loosen the mechanical seal to be tested (not shown in the figure) in the containing inner cavity 51 through the clamping member 64.

[0049] When the mechanical seal to be tested is clamped in the accommodating inner cavity 51, the lifting device 4 can drive the lifting and lowering block 5 to lower the mechanical seal to be tested from above the sealing base 2 relative to the supporting base 1 and the sealing base 2, until the lifting and lowering block 5 presses the bottom end surface of the mechanical seal to be tested downward and seals it to the sealing base 2, and the bottom end surface of the mechanical seal to be tested and the sealing base 2 are squeezed to form a sealing (airtight) effect on the bottom end surface of the mechanical seal to be tested, and at the same time, the bottom end opening arranged on the bottom end surface is aligned with the gas transmission through hole 21, such as Figure 1 , 4 At this time, the gas delivery device 3 can deliver gas to the inside of the mechanical seal to be tested through the gas flow path composed of the gas channel, the gas delivery hole 21 and the bottom opening, until a gas pressure of a specified value is formed inside the mechanical seal to be tested, and the pressure detection device 7 arranged in the gas channel detects the gas pressure inside the mechanical seal to be tested in real time and feeds back the gas pressure inside the mechanical seal to be tested to the central control device 8 of the mechanical seal detection device. After keeping the bottom end surface of the mechanical seal to be tested pressed down against the sealing bottom gasket 2 for a certain preset time, the central control device 8 can calculate the specific value representing the mechanical sealing (air tightness) of the mechanical seal to be tested, as shown in FIG. Figure 2-4 shown.

[0050] After the test is completed and the mechanical seal to be tested is loosened in the accommodating inner cavity 51, the lifting device 4 can drive the lifting and pressing block 5 to rise from above the sealing bottom gasket 2 relative to the supporting base 1, i.e., the sealing bottom gasket 2, until the mechanical seal to be tested is completely separated from the accommodating inner cavity 51 at the bottom of the lifting and pressing block 5. At this time, the mechanical seal to be tested that is retained on the sealing bottom gasket 2 can be taken out from the mechanical seal detection device and stored, and enter the mechanical seal detection device for the clamping installation and mechanical sealing (air tightness) detection process of the next mechanical seal to be tested. Alternatively, after the test is completed, the mechanical seal to be tested may not be loosened first, but the mechanical seal to be tested may be kept clamped in the accommodating inner cavity 51. The lifting device 4 drives the lifting and pressing block 5 to raise the mechanical seal to be tested relative to the supporting base 1, i.e., the sealing bottom gasket 2, until the mechanical seal to be tested is separated from the sealing bottom gasket 2, and then the mechanical seal to be tested is loosened and taken out from the mechanical seal detection device. Figure 1 , 4 shown.

[0051] Please also read Figure 1-3 In this embodiment, the sealing base gasket 2 is a sealing rubber gasket, which is preferably made of organic silica gel or a rubber sealing plate, or a plastic sealing plate. Depending on the type of mechanical seal to be tested, it can also be made of a metal sealing plate.

[0052] The top of the support base 1 is provided with a mounting groove 11 matching the shape of the sealing pad (sealing base pad 2), the sealing pad (sealing base pad 2) is embedded in the mounting groove 11, and the gas delivery channel 33 runs through the bottom of the mounting groove 11 and matches the gas delivery through hole 21. Figure 1-3 shown.

[0053] Please also read Figure 1-3 In this embodiment, the diameter of the gas transmission through hole 21 is less than or equal to the diameter of the bottom opening of the bottom end surface of the mechanical seal to be tested, so that when the bottom end opening is aligned with the gas transmission through hole 21, the gas transmission through hole 21 is completely covered in the bottom opening of the bottom end surface of the mechanical seal to be tested, and the portion of the bottom end opening surrounding the gas transmission through hole 21 is sealed by compacting the sealing rubber gasket (sealing bottom gasket 2) on the bottom end surface of the mechanical seal to be tested to ensure air tightness.

[0054] See also Figure 1 , 4 In this embodiment, the clamping device 6 comprises:

[0055] The transmission screw 61 is rotatably installed on the lifting and lowering block 5, with one axial end of the transmission screw 61 extending to the outside of the lifting and lowering block 5, and the other axial end of the transmission screw 61 extending into the accommodating inner cavity 51; the dial knob 62 is installed on the axial end of the transmission screw 61 extending to the outside of the lifting and lowering block 5; the driven nut 63, through its internal thread (not shown in the figure) cooperates with the external thread 611 on the outer side of the transmission screw 61, so that it can be movably installed on the part of the transmission screw 61 located in the accommodating inner cavity 51 along the axial direction of the transmission screw 61, and the above-mentioned clamping member 64 is installed on the driven nut 63, as shown in FIG. Figure 4 shown.

[0056] When the inspector turns the dial knob 62 in the forward and reverse directions, the transmission screw 61 can be driven to rotate around its central axis relative to the lifting and lowering block 5, thereby driving the driven nut 63 and the clamping member 64 mounted thereon to reciprocate along the axial direction of the transmission screw 61 in the accommodating inner cavity 51, relatively approaching or moving away from the inner side wall 512 of the accommodating inner cavity 51, so as to clamp or loosen the mechanical seal to be tested in the accommodating inner cavity 51 through the clamping member 64. Figure 4 shown.

[0057] See also Figure 1 , 4 As a preferred implementation of this embodiment, a screw bearing (not shown in the figure) is provided on the inner wall 512 of the accommodating inner cavity 51 on the side opposite to the toggle knob 62, and the other axial end of the transmission screw 61 extending into the accommodating inner cavity 51 extends to the screw bearing and is rotatably mounted on the screw bearing.

[0058] See also Figure 1 , 4As a more preferred implementation of this embodiment, a pair of external threads 611 with opposite rotation directions are provided on the outer side surfaces at both axial ends of the transmission screw 61, and a pair of driven nuts 63 are respectively threadedly connected to the pair of external threads 611 with opposite rotation directions; when the inspection personnel turn the dial knob 62 in the forward and reverse directions and drive the transmission screw 61 to rotate in the forward and reverse directions, the pair of driven nuts 63 can be driven to move in the opposite or opposite directions along the axial direction of the transmission screw 61, thereby driving a pair of clamping members 64 to clamp or loosen the mechanical seal to be tested in the accommodating inner cavity 51.

[0059] See also Figure 1 , 4 As a more preferred implementation of this embodiment, a guide groove 513 is provided on one side of the top of the accommodating inner cavity 51, and one side end of the driven nut 63 can be movably installed in the guide groove 513 along the guide groove 513, and the other side end of the driven nut 63 extends to the top of the accommodating inner cavity 51 and is fixedly connected to the top of the clamping member 64.

[0060] As an implementation of this embodiment, the above-mentioned screw bearing (not shown in the figure) can also be fixedly installed in the guide groove 513.

[0061] See also Figure 1 , 4 As a preferred implementation of this embodiment, the clamping member 64 is a clamping plate.

[0062] As a more preferred implementation of this embodiment, a clamping groove (not shown in the figure) matching the shape of the mechanical seal to be tested is provided on the inner side of the clamping plate facing the mechanical seal to be tested.

[0063] In another embodiment (not shown in the figure), the driving screw 61 of the clamping device 6 may not be provided with the toggle knob 62, but the driving screw 61 is directly driven by a driving motor (not shown in the figure) to rotate forward and reverse.

[0064] In other embodiments (not shown in the figure), the clamping device 6 can also use a linear drive mechanism such as a clamping cylinder, a gear rack, a synchronous pulley, etc. instead of a transmission screw 61 to drive the clamping member 64 to reciprocate towards or away from the inner wall 512 of the accommodating cavity 51.

[0065] See also Figure 1 , 4 In this embodiment, the lifting device 4 includes:

[0066] The mounting bracket 41 is disposed on the top of the supporting base 1 and extends to above the sealing base gasket 2 ; the lifting mechanism 42 is disposed on the mounting bracket 41 and is used to drive the lifting block 5 to move upward and downward above the sealing base gasket 2 .

[0067] See also Figure 1 ,4 As a preferred implementation of this embodiment, the lifting mechanism 42 is a lifting cylinder, and the top of the lifting pressure block 5 is fixedly installed on a telescopic rod (i.e., an output member, not shown in the figure) that can move up and down by the lifting cylinder.

[0068] See also Figure 1 , 4 As a more preferred implementation of this embodiment, the mounting bracket 41 includes:

[0069] The mounting column 411 is mounted on the top of the support base 1; the mounting cantilever 412 is mounted on the mounting column 411 and extends above the sealing base pad 2; the lifting cylinder is mounted on the top of the mounting cantilever 412, and the mounting cantilever 412 is provided with a clearance hole 413 matching the telescopic rod of the lifting cylinder, and the telescopic rod extending downward from the lifting cylinder is passed through the clearance hole 413 and fixedly connected to the top of the lifting pressure block 5, so that the lifting pressure block 5 is driven to move up and down between the mounting cantilever 412 and the sealing base pad 2 through the upward and downward telescopic movement of the telescopic rod relative to the lifting cylinder, thereby driving the mechanical seal to be tested to be pressed downward on the sealing base pad 2 or to be separated from the sealing base pad 2 upward, such as Figure 1 , 2 , as shown in Figure 4.

[0070] Please also read Figure 1-3 In this embodiment, the gas delivery device 3 includes:

[0071] The air inlet pipe 32 is arranged on one side of the support base 1; the air pump 31 is arranged inside the support base 1, and is connected to the air inlet pipe 32 and the air delivery hole 21 through an air inlet channel (not shown in the figure) and an air delivery channel 33 respectively. The above-mentioned gas channel is composed of the air inlet pipe 32, the air inlet channel, the air pump 31, and the air delivery channel 33. The external air source can be extracted by the air pump 31 through the air inlet pipe 32, and is sequentially transported to the inside of the mechanical seal to be tested through the air inlet pipe 32, the air inlet channel, the air pump 31, the air delivery channel 33, the air delivery hole 21 and the bottom end opening of the mechanical seal to be tested.

[0072] See also Figure 1 , 2 As a preferred implementation of this embodiment, the air intake channel and the air delivery channel 33 respectively correspond to the air intake pipe 32 and the air delivery pipeline.

[0073] See also Figure 1 , 2 As a preferred implementation of this embodiment, the gas delivery device 3 also includes:

[0074] The pressure detection device 7 is installed on the gas transmission channel 33 and is used to detect the gas pressure inside the mechanical seal to be tested in real time.

[0075] As a more preferred implementation of this embodiment, the pressure detection device 7 adopts an air pressure sensor.

[0076] See also Figure 1 , 3 In this embodiment, the gas delivery device 3 further includes:

[0077] The central control device 8 is disposed on the supporting base 1 and is used to control the gas delivery device 3, the lifting device 4 and the clamping device 6 to respectively perform their corresponding functions.

[0078] See also Figure 1 , 3 As a preferred implementation of this embodiment, the central control device 8 includes:

[0079] The control panel 81 is installed on one side of the support base 1; the control main board 82 is installed inside the support base 1 and is electrically connected to the corresponding control circuits of the control panel 81, the gas supply device 3, the lifting device 4, the clamping device 6, and the pressure detection device 7.

[0080] See also Figure 1 , 2 In this embodiment, the mechanical seal detection device further includes:

[0081] A plurality of base pads 9 are installed at the bottom of the support base 1 to support the mechanical seal detection device.

[0082] See also Figure 1 , 2 As a preferred implementation scheme of this embodiment, the support base 1 is rectangular (rectangular), and four threaded mounting holes 12 are respectively arranged at the four corners of the bottom surface of the support base 1, and four base pads 9 are respectively provided with threaded connection holes matching the threaded mounting holes 12. The four base pads 9 are respectively threadedly matched with the corresponding threaded connection holes through adjusting screws 91, so as to adjust the horizontality and height of the support base 1 relative to the supporting ground by adjusting the depth of the threaded connection between the adjusting screws 91 and the corresponding threaded connection holes.

[0083] As a preferred embodiment, the mechanical seal to be tested is a mechanical seal component of a centrifugal pump, and the bottom end surface of the mechanical seal to be tested is an end surface of the mechanical seal component of the centrifugal pump for sealing the circumferential gap between the transmission shaft and the pump body of the centrifugal pump.

[0084] Please also read Figure 1-4The mechanical seal detection device provided by the utility model can drive the clamping member 64 to reciprocate in the bottom accommodating inner cavity 51 of the lifting and lowering pressure block 5 relative to the inner side wall 512 of the accommodating inner cavity 51 through the clamping device 6, so as to quickly and conveniently clamp or loosen the mechanical seal to be tested (such as the mechanical seal component of the centrifugal pump) in the accommodating inner cavity 51 through the clamping member 64. After the mechanical seal to be tested is clamped in the accommodating inner cavity 51, it is only necessary to drive the lifting and lowering pressure block 5 to descend above the supporting base 1 and the sealing base gasket 2 by the lifting device 4, so that the bottom end surface of the mechanical seal to be tested (such as the end surface of the mechanical seal component of the centrifugal pump used to seal the circumferential gap between the transmission shaft and the pump body of the centrifugal pump) can be pressed and sealed on the sealing base gasket 2, and the bottom end opening provided on the bottom end surface is aligned with the gas transmission through hole 21. At this time, the gas transmission device 3 can pass through the air intake pipe 32, the air intake channel, the air pump 31, The gas flow path formed by the gas supply channel 33, the gas supply through hole 21 and the bottom opening of the mechanical seal to be tested supplies gas to the inside of the mechanical seal to be tested to form a gas pressure of a specified value inside the mechanical seal to be tested, and the gas pressure inside the mechanical seal to be tested is detected in real time by the pressure detection device 7 and fed back to the central control device 8. After keeping the mechanical seal to be tested pressed down for a certain preset time, the central control device 8 can accurately calculate the specific value representing the mechanical sealing (air tightness) of the mechanical seal to be tested.

[0085] Therefore, the mechanical seal detection device provided by the utility model can complete the sealing connection between the mechanical seal to be tested and the mechanical seal detection device without assembling multiple specific parts and components that match the mechanical seal to be tested, thereby simplifying the sealing connection installation operation of the mechanical seal to be tested and improving the efficiency of mechanical seal detection thereof.

[0086] At the same time, the mechanical seal detection device provided by the utility model, the clamping member 64 of the clamping device 6 can perform adaptive movement adjustment to mechanical seal components of different types and sizes, so that the clamping device 6 can adapt to clamp mechanical seal components of different types and sizes, avoiding the detection universality limitations caused by traditional mechanical seal detection devices that use multiple specific spare parts corresponding to a single type and size, thereby reducing the cost of mechanical seal detection.

[0087] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art should understand that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical seal detection device, characterized in that: include: Support base (1); A sealing base pad (2) is arranged on the top of the supporting base (1); and a gas transmission hole (21) is arranged on the sealing base pad (2); A gas delivery device (3) is arranged inside the support base (1) and is connected to the gas delivery through hole (21); A lifting device (4) is arranged on the top of the supporting base (1) and is used to drive the lifting and lowering pressure block (5) to move upward and downward above the sealing base pad (2); An accommodating inner cavity (51) is arranged at the bottom of the lifting and pressing block (5); A clamping device (6) is mounted on the lifting and lowering block (5) and is used to drive the clamping member (64) to reciprocate in the accommodating inner cavity (51) relative to the inner wall (512) of the accommodating inner cavity (51), so as to clamp or loosen the mechanical seal to be tested in the accommodating inner cavity (51) through the clamping member (64); When the mechanical seal to be tested is clamped in the accommodating inner cavity (51), the lifting device (4) drives the lifting and lowering pressure block (5) to descend, thereby pressing the bottom end surface of the mechanical seal to be tested tightly and sealing it on the sealing base pad (2), and making the bottom end opening provided on the bottom end surface align with the gas supply through hole (21), and the gas supply device (3) can supply gas to the inside of the mechanical seal to be tested through the bottom end opening to detect the mechanical sealing performance of the mechanical seal to be tested.

2. The mechanical seal detection device according to claim 1, characterized in that: The clamping device (6) comprises: A transmission screw (61) is rotatably disposed on the lifting and lowering block (5), one end of the transmission screw (61) extends to the outside of the lifting and lowering block (5), and the other end of the transmission screw (61) extends into the accommodating inner cavity (51); A toggle knob (62) is mounted on one end of the transmission screw (61) extending outward from the lifting and lowering block (5); The driven nut (63) can be movably installed on the portion of the driving screw (61) located in the accommodating inner cavity (51) along the axial direction of the driving screw (61), and the clamping member (64) is installed on the driven nut (63).

3. The mechanical seal detection device according to claim 2, characterized in that: A screw bearing is provided on the inner side wall (512) of the accommodating inner cavity (51) opposite to the dial knob (62), and the other end of the transmission screw (61) is rotatably mounted on the screw bearing.

4. The mechanical seal detection device according to claim 2 or 3, characterized in that: The outer side surfaces of the two axial ends of the transmission screw (61) are provided with a pair of external threads (611) with opposite rotation directions, and a pair of driven nuts (63) are respectively threadedly connected to the pair of external threads (611) with opposite rotation directions; When the driving screw (61) rotates forwards or backwards, it can drive a pair of driven nuts (63) to move in opposite directions along the axial direction of the driving screw (61), thereby driving a pair of clamping members (64) to clamp or loosen the mechanical seal to be tested in the accommodating inner cavity (51).

5. The mechanical seal detection device according to any one of claims 1 to 3, characterized in that: The lifting device (4) comprises: A mounting bracket (41) is disposed on the top of the supporting base (1) and extends above the sealing base pad (2); The lifting mechanism (42) is arranged on the mounting bracket (41) and is used to drive the lifting and lowering pressure block (5) to move upward and downward above the sealing base gasket (2).

6. The mechanical seal detection device according to claim 5, characterized in that: The lifting mechanism (42) is a lifting cylinder, and the lifting pressure block (5) is fixedly mounted on a telescopic rod of the lifting cylinder that can move upward and downward.

7. The mechanical seal detection device according to claim 6, characterized in that: The mounting bracket (41) comprises: A mounting column (411) mounted on the top of the support base (1); A mounting cantilever (412) mounted on the mounting column (411) and extending above the sealing base pad (2); The lifting cylinder is installed on the top of the mounting cantilever (412), and the mounting cantilever (412) is provided with a clearance hole (413) matching the telescopic rod. The telescopic rod is inserted into the clearance hole (413) to drive the lifting and lowering pressure block (5) to move up and down between the mounting cantilever (412) and the sealing base pad (2).

8. The mechanical seal detection device according to any one of claims 1 to 3, characterized in that: The gas delivery device (3) comprises: An air inlet pipe (32) is arranged on one side of the support base (1); An air pump (31) is arranged inside the support base (1) and is connected to the air inlet pipe (32) and the air delivery hole (21) through an air inlet channel and an air delivery channel (33) respectively; The external air source can be delivered to the interior of the mechanical seal to be tested by the air pump (31) through the air inlet pipe (32).

9. The mechanical seal detection device according to claim 8, characterized in that: The gas delivery device (3) further comprises: A pressure detection device is installed on the gas delivery channel (33) and is used to detect the pressure inside the mechanical seal to be tested.

10. The mechanical seal detection device according to claim 8, characterized in that: The sealing base gasket (2) is a sealing rubber gasket, the top of the supporting base (1) is provided with a mounting groove (11) matching the shape of the sealing rubber gasket, the sealing rubber gasket is embedded in the mounting groove (11), the diameter of the gas transmission hole (21) is less than or equal to the diameter of the bottom opening, and the gas transmission channel (33) penetrates to the bottom of the mounting groove (11) and matches the gas transmission hole (21).

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