Sealing performance testing device for mechanical sealing element

Abstract

The invention relates to the technical field of sealing element testing, and discloses a sealing performance testing device for a mechanical sealing element, which comprises a detection box, the top of the detection box is provided with a cover plate, the inner cavity of the detection box is provided with a placing ring, the surface of the detection box is provided with a first mounting groove and a second mounting groove, and the inner cavity of the first mounting groove is fixedly connected with a first pipeline. The top of the first pipeline is fixedly connected with a pressure display, an inner cavity of the second mounting groove is fixedly connected with a second pipeline, and one side of the second pipeline is fixedly connected with an air valve. The cover plate does not hinder the sealing element from being placed into the detection box, and the ratchet wheel and the L-shaped clamping block can be limited through the pawl, so that the cover plate can be stabilized on the upper side of the detection box.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seal test, in particular to a sealing performance testing device for mechanical seal. BACKGROUND

[0002] The mechanical seal belongs to one of the precise and relatively complex mechanical basic elements, and is a key component of various pumps, reaction synthesis kettles, turbine compressors, submersible motors and other equipment. In order to ensure the sealing performance of the mechanical seal to prevent leakage, it is necessary to test the sealing performance of the mechanical seal.

[0003] According to the search, the patent with the publication number CN212030856U discloses a sealing performance detection device for mechanical seal. When testing is needed, first, the seal is placed on the placement ring, the handle is rotated, the screw is rotated under the drive of the handle, the pressure cover and the pressure rod move downward together under the cooperation of the telescopic rod, until the pressure cover is completely connected with the top of the test box, so that the sealing box is in a closed space, then the air valve is opened, air is sent to the test box from the air inlet pipe, the pressure in the test box is observed through the pressure display, when the pressure in the test box reaches a specified value, the air valve is closed, the detection work is carried out, the pressure display value is observed after a period of standing, if there is no change, it means that the sealing performance of the seal is good, then the air pressure in the test box is discharged through the air outlet pipe under the cooperation of the air valve, finally, the handle is rotated, the pressure cover is opened, and the thin seal on the placement ring is ejected under the elastic action of the first spring, which is convenient for taking the seal. However, there are still the following problems:

[0004] The above reference file places the seal on the placement ring, then rotates the screw to drive the pressure cover to move downward and close the test box, so as to test the seal. However, due to the obstruction of the screw and the pressure cover on the upper side of the test box, it is difficult to place the seal on the placement ring in the test box. SUMMARY

[0005] In view of the defects of the prior art, the present application provides a sealing performance testing device for mechanical seal, which mainly solves the problem that the obstruction of the screw and the pressure cover on the upper side of the test box makes it difficult to place the seal on the placement ring in the test box.

[0006] TECHNICAL SCHEME

[0007] To achieve the above purpose, the present application provides the following technical scheme:

[0008] A kind of sealing performance testing device for mechanical seal, including detection box, the top of the detection box is provided with cover plate, the inner chamber of the detection box is provided with placement ring, the surface of the detection box is equipped with first installation groove and second installation groove, the inner chamber of the first installation groove is fixedly connected with first pipeline, the top of the first pipeline is fixedly connected with pressure display, the inner chamber of the second installation groove is fixedly connected with second pipeline, one side of the second pipeline is fixedly connected with gas valve, the surface of the detection box is provided with positioning mechanism;

[0009] The positioning mechanism includes first fixed block, one side of the first fixed block is fixedly connected to the surface of the detection box, one side of the first fixed block is rotatably connected with rotating rod, the surface of the rotating rod is fixedly connected with round block, the surface of the round block is fixedly connected with L-shaped clamping block, one side of the rotating rod is fixedly connected with ratchet wheel, the surface of the detection box is fixedly connected with fixed plate, one side of the fixed plate is fixedly connected with first connecting rod and fixed rod, the bottom of the first connecting rod is fixedly connected with leaf spring, the surface of the fixed rod is sleeved with ratchet pawl, the surface of the cover plate is provided with concave block, one side of the concave block is fixedly connected to the surface of the detection box.

[0010] As a further scheme of the application, the inner chamber of the detection box is fixedly connected with air cylinder, the top of the air cylinder is fixedly connected with cross rod, one side of the cross rod is fixedly connected to the inner chamber of the placement ring.

[0011] As a further scheme of the application, the surface of the ratchet pawl is fixedly connected with second fixed block, one side of the second fixed block is fixedly connected with second connecting rod, one side of the second connecting rod is fixedly connected with push block.

[0012] As a further scheme of the application, one side of the fixed plate is fixedly connected with spring, one side of the spring is fixedly connected to one side of the ratchet pawl.

[0013] As a further scheme of the application, one side of the L-shaped clamping block is provided with push rod, one side of the push rod is fixedly connected to the surface of the round block.

[0014] As a further scheme of the application, the top of the cover plate is provided with rubber block, the top of the rubber block is fixedly connected to the bottom of the L-shaped clamping block.

[0015] As a further scheme of the application, the top of the cover plate is fixedly connected with handle, the surface of the handle is fixedly connected with sponge cover.

[0016] As a further scheme of the application, the bottom of the detection box is fixedly connected with support block, the bottom of the support block is fixedly connected with rubber pad.

[0017] Beneficial effects

[0018] Compared with the prior art, the mechanical seal sealing performance testing device has the following beneficial effects:

[0019] 1、The sealing element is placed on the upper side of the placement ring in the detection box, and then the cover plate is closed on the upper side of the detection box, so that the cover plate does not hinder the sealing element from being placed in the detection box, and the problem that the cover plate easily blocks the sealing element and is difficult to be placed on the placement ring is solved.

[0020] 2、The pawl limits the ratchet wheel and the L-shaped clamping block, so that the cover plate can be stably placed on the upper side of the detection box, and the problem that the cover plate is unstable on the upper side of the detection box is solved.

[0021] 3、The cross rod and the placement ring are driven by the air cylinder to move up and down, so that the placement ring and the sealing element are moved out of the detection box, and the problem that the sealing element is inconvenient to move out is solved.

[0022] 4、The pawl is driven to move by pressing the push block, so that the pawl can be disengaged from the engagement with the ratchet wheel, and the effect that the ratchet wheel and the L-shaped clamping block cannot be freely rotated is solved.

[0023] 5、The pawl is supported and fixed by the spring, so that the pawl can be stably placed on the surface of the fixing rod, and the problem that the pawl is easily disengaged from the fixing rod is solved. DETAILED DESCRIPTION

[0024] Figure 1 A detection box three-dimensional structure schematic diagram of a mechanical seal sealing performance testing device is provided for the present application;

[0025] Figure 2 A detection box three-dimensional structure schematic diagram of a mechanical seal sealing performance testing device is provided for the present application; Figure 2 A A part enlarged structure schematic diagram of the present application;

[0026] Figure 3 A spring three-dimensional structure schematic diagram of a mechanical seal sealing performance testing device is provided for the present application;

[0027] Figure 4 A cylinder three-dimensional structure schematic diagram of a mechanical seal sealing performance testing device is provided for the present application;

[0028] Figure 5 A rotating rod three-dimensional structure schematic diagram of a mechanical seal sealing performance testing device is provided for the present application;

[0029] Figure 6 A placement ring three-dimensional structure schematic diagram of a mechanical seal sealing performance testing device is provided for the present application.

[0030] In the figure: 1, detection box; 2, cover plate; 3, first installation slot; 4, second installation slot; 5, first pipe; 6, second pipe; 7, pressure display; 8, air valve; 9, positioning mechanism; 901, first fixed block; 902, rotating rod; 903, round block; 904, L-shaped clamping block; 905, ratchet wheel; 906, fixed plate; 907, first connecting rod; 908, leaf spring; 909, fixed rod; 910, pawl; 911, concave block; 10, air cylinder; 11, cross rod; 12, second fixed block; 13, second connecting rod; 14, push block; 15, spring; 16, lever; 17, rubber block; 18, handle; 19, sponge cover; 20, supporting block; 21, rubber pad; 22, placing ring. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0032] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] REFERENCE Figures 1-6The utility model provides a kind of sealing performance testing device for mechanical seal, including detection box 1, the top of detection box 1 is provided with cover plate 2, the inner cavity of detection box 1 is provided with placing ring 22, the surface of detection box 1 is equipped with first installation groove 3 and second installation groove 4, the inner cavity of first installation groove 3 is fixedly connected with first pipeline 5, the top of first pipeline 5 is fixedly connected with pressure display 7, the inner cavity of second installation groove 4 is fixedly connected with second pipeline 6, one side of second pipeline 6 is fixedly connected with gas valve 8, the surface of detection box 1 is provided with positioning mechanism 9;

[0035] It needs to be explained that the placing ring 22 inside detection box 1 upside can be used to place the sealing element needing to carry out sealing detection, and cover plate 2 can be covered on the upside of detection box 1 to close the inside of detection box 1, and the sealing element will be located at the gap between detection box 1 and cover plate 2, the inside of second installation groove 4 can be used to place second pipeline 6, and second pipeline 6 can be connected with gas valve 8, so that gas valve 8 can be used to transport air to the inside of detection box 1, the inside of first installation groove 3 can be used to install first pipeline 5, and first pipeline 5 can be connected with pressure display 7, and pressure display 7 can detect and display the pressure in the inside of detection box 1, which enables people to detect the sealing performance of sealing element by watching the pressure number change in the inside of detection box 1 displayed by pressure display 7.

[0036] Positioning mechanism 9 includes first fixed block 901, one side of first fixed block 901 is fixedly connected to the surface of detection box 1, one side of first fixed block 901 is rotatably connected with rotating rod 902, the surface of rotating rod 902 is fixedly connected with round block 903, the surface of round block 903 is fixedly connected with L-shaped clamping block 904, one side of rotating rod 902 is fixedly connected with ratchet wheel 905, the surface of detection box 1 is fixedly connected with fixed plate 906, one side of fixed plate 906 is fixedly connected with first connecting rod 907 and fixed rod 909, the bottom of first connecting rod 907 is fixedly connected with leaf spring 908, the surface of fixed rod 909 is sleeved with ratchet pawl 910, the surface of cover plate 2 is provided with concave block 911, one side of concave block 911 is fixedly connected to the surface of detection box 1;

[0037] It should be noted that the first fixed block 901 can be used to support the rotating rod 902, so that the rotating rod 902 can rotate, and the rotating rod 902 can drive the circular block 903 to rotate together, the L-shaped clamping block 904 is located on the surface of the circular block 903, and can be driven by the circular block 903 to rotate together and rotate to the upper side of the cover plate 2, and then cooperate with the plurality of concave blocks 911, so that the cover plate 2 can be limited, so that the cover plate 2 can be stably located on the upper side of the detection box 1, which not only enables the cover plate 2 to be closed by being directly placed on the upper side of the detection box 1, so that the cover plate 2 cannot hinder the sealing element from being placed into the detection box 1, but also enables the cover plate 2 to be difficult to move away from the detection box 1, the fixing plate 906 can be used to connect the fixed rod 909, and the fixed rod 909 can be connected with the pawl 910, so that the pawl 910 can rotate on the upper side of the ratchet wheel 905, the ratchet wheel 905 can be driven by the circular block 903 to rotate together, which enables the L-shaped clamping block 904 to clamp the cover plate 2, and the ratchet wheel 905 can rotate together and press the pawl 910 to rotate, and the pawl 910 can limit the ratchet wheel 905, so that the ratchet wheel 905 and the L-shaped clamping block 904 cannot rotate back, thereby ensuring the stability of the cover plate 2, and the first connecting rod 907 can be connected with the leaf spring 908, and the leaf spring 908 is located on the upper side of the pawl 910 and can be reset by the pawl 910, and the pawl 910 can be stably engaged with the ratchet wheel 905.

[0038] In particular, the inner cavity of the detection box 1 is fixedly connected with the air cylinder 10, the top of the air cylinder 10 is fixedly connected with the cross rod 11, and one side of the cross rod 11 is fixedly connected with the inner cavity of the placement ring 22.

[0039] It should be noted that the cross rod 11 can be used to connect the air cylinder 10 and the placement ring 22, so that the air cylinder 10 can drive the placement ring 22 and the sealing element to move up and down through the cross rod 11, which not only enables the sealing element to be easily pushed out for easy taking, but also drives the cross rod 11 and the placement ring 22 to move up and down to place sealing elements of different thicknesses.

[0040] In particular, the surface of the pawl 910 is fixedly connected with the second fixed block 12, one side of the second fixed block 12 is fixedly connected with the second connecting rod 13, and one side of the second connecting rod 13 is fixedly connected with the push block 14.

[0041] It should be noted that the second fixed block 12 can be connected with the pawl 910 and the second connecting rod 13, so that the second connecting rod 13 can drive the pawl 910 to move by extrusion, so that the pawl 910 is disengaged from the engagement with the ratchet wheel 905, at this time, the ratchet wheel 905 and the L-shaped clamping block 904 can be freely rotated, thereby facilitating the taking out of the cover plate 2, and the diameter of the push block 14 is greater than the diameter of the second connecting rod 13, so that when the push block 14 is pressed, it is more comfortable.

[0042] In particular, one side of the fixed plate 906 is fixedly connected with the spring 15, one side of the spring 15 is fixedly connected with one side of the ratchet pawl 910;

[0043] It should be noted that the spring 15 can support the ratchet pawl 910, so that the ratchet pawl 910 can be stably arranged on the surface of the fixed rod 909 and is not easy to move, thereby stably engaging with the ratchet wheel 905, and the elasticity of the spring 15 can also enable the ratchet pawl 910 to move smoothly.

[0044] In particular, one side of the L-shaped clamping block 904 is provided with the push rod 16, one side of the push rod 16 is fixedly connected with the surface of the circular block 903;

[0045] It should be noted that the push rod 16 can facilitate the rotation of the circular block 903, thereby driving the L-shaped clamping block 904 to rotate, which makes the rotation of the L-shaped clamping block 904 more convenient.

[0046] In particular, the top of the cover plate 2 is provided with the rubber block 17, the top of the rubber block 17 is fixedly connected with the bottom of the L-shaped clamping block 904;

[0047] It should be noted that the rubber block 17 can be used to increase the friction between the L-shaped clamping block 904 and the cover plate 2, so that the cover plate 2 is more stable at the bottom of the L-shaped clamping block 904 and is not easy to rotate and move.

[0048] In particular, the top of the cover plate 2 is fixedly connected with the handle 18, the surface of the handle 18 is fixedly connected with the sponge cover 19;

[0049] It should be noted that the handle 18 can facilitate people to hold and move the cover plate 2, and the sponge cover 19 can make people more comfortable when holding the handle 18.

[0050] In particular, the bottom of the detection box 1 is fixedly connected with the support block 20, the bottom of the support block 20 is fixedly connected with the rubber pad 21;

[0051] It should be noted that the support block 20 can support the detection box 1, and the rubber pad 21 can make the detection box 1 more stable on the platform and not easy to move.

[0052] The application in use is divided into the following steps:

[0053] S1: first, the sealing element to be sealed detection is placed in the detection box 1 inside, and located in the upper side of the placement ring 22, then the cover plate 2 from the side slide detection box 1 on the upper side, the inside of the detection box 1 is closed, then use the air valve 8 through the second pipeline 6 to the inside of the detection box 1 conveying air, while the pressure display 7 can be through the first pipeline 5 to show the detection box 1 inside the pressure value, when the inside of the detection box 1 air delivery is completed, the air valve 8 can be closed, and wait for a period of time, while observing the pressure display 7 shows the detection box 1 inside the pressure value whether changes, if no change, it is proved that the sealing performance of the sealing element is good, if the value has changed, it is proved that the sealing performance of the sealing element is poor;

[0054] S2: when the cover plate 2 is placed on the upper side of the detection box 1, the cover plate 2 will first be located between the plurality of concave blocks 911, and then the L-shaped clamping block 904 can be rotated to drive the round block 903 to rotate, and the round block 903 will drive the ratchet wheel 905 to rotate together, and the ratchet wheel 905 will squeeze the pawl 910 to rotate, and then the pawl 910 will squeeze the leaf spring 908 to deform, and after deformation, the pawl 910 will be bounced back to the original position, thereby engaging with the ratchet wheel 905, at this time, the pawl 910 will limit the ratchet wheel 905, so that the ratchet wheel 905 and the L-shaped clamping block 904 cannot rotate back, thereby enabling the cover plate 2 to be stably positioned on the upper side of the detection box 1 and not easily moved, when the cover plate 2 needs to be removed, the pawl 910 can be pressed to move away from the engagement with the ratchet wheel 905 on the surface of the fixed rod 909, so that the ratchet wheel 905 and the L-shaped clamping block 904 can be freely rotated, thereby removing the cover plate 2 and the sealing element inside the detection box 1. Since the cover plate 2 is placed on the upper side of the detection box 1 and is positioned, the cover plate 2 will not hinder the placement of the sealing element into the inside of the detection box 1, thereby solving the problem that the upper side of the detection box 1 is hindered by the screw rod and the cover plate 2 and other parts, which makes it difficult to place the sealing element on the placement ring 22 inside the detection box 1.

[0055] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0056] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be considered as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A sealing performance testing device for mechanical seals, comprising a testing chamber (1), characterized in that, The top of the test box (1) is provided with a cover plate (2), the inner cavity of the test box (1) is provided with a placement ring (22), the surface of the test box (1) is provided with a first mounting groove (3) and a second mounting groove (4), the inner cavity of the first mounting groove (3) is fixedly connected with a first pipe (5), the top of the first pipe (5) is fixedly connected with a pressure display (7), the inner cavity of the second mounting groove (4) is fixedly connected with a second pipe (6), one side of the second pipe (6) is fixedly connected with an air valve (8), and the surface of the test box (1) is provided with a positioning mechanism (9). The positioning mechanism (9) includes a first fixing block (901), one side of which is fixedly connected to the surface of the detection box (1), a rotating rod (902) is rotatably connected to one side of the first fixing block (901), a round block (903) is fixedly connected to the surface of the rotating rod (902), an L-shaped locking block (904) is fixedly connected to the surface of the round block (903), a ratchet (905) is fixedly connected to one side of the rotating rod (902), a fixing plate (906) is fixedly connected to the surface of the detection box (1), a first connecting rod (907) and a fixing rod (909) are fixedly connected to one side of the fixing plate (906), a leaf spring (908) is fixedly connected to the bottom of the first connecting rod (907), a pawl (910) is sleeved on the surface of the fixing rod (909), a concave block (911) is provided on the surface of the cover plate (2), and one side of the concave block (911) is fixedly connected to the surface of the detection box (1).

2. The sealing performance testing device for mechanical seals according to claim 1, characterized in that, A cylinder (10) is fixedly connected to the inner cavity of the detection box (1), and a cross rod (11) is fixedly connected to the top of the cylinder (10). One side of the cross rod (11) is fixedly connected to the inner cavity of the placement ring (22).

3. The sealing performance testing device for mechanical seals according to claim 1, characterized in that, The surface of the pawl (910) is fixedly connected to a second fixing block (12), a second connecting rod (13) is fixedly connected to one side of the second fixing block (12), and a push block (14) is fixedly connected to one side of the second connecting rod (13).

4. The sealing performance testing device for mechanical seals according to claim 1, characterized in that, A spring (15) is fixedly connected to one side of the fixing plate (906), and one side of the spring (15) is fixedly connected to one side of the pawl (910).

5. The sealing performance testing device for mechanical seals according to claim 1, characterized in that, A lever (16) is provided on one side of the L-shaped card block (904), and one side of the lever (16) is fixedly connected to the surface of the round block (903).

6. The sealing performance testing device for mechanical seals according to claim 1, characterized in that, A rubber block (17) is provided on the top of the cover plate (2), and the top of the rubber block (17) is fixedly connected to the bottom of the L-shaped card block (904).

7. The sealing performance testing device for mechanical seals according to claim 1, characterized in that, A handle (18) is fixedly connected to the top of the cover plate (2), and a sponge sleeve (19) is fixedly connected to the surface of the handle (18).

8. The sealing performance testing device for mechanical seals according to claim 2, characterized in that, The bottom of the testing box (1) is fixedly connected to a support block (20), and the bottom of the support block (20) is fixedly connected to a rubber pad (21).

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