Easily detachable sealing element testing device

Abstract

The utility model discloses an easily detachable sealing element testing device which comprises a testing cylinder body and a cylinder cover, a connecting part is formed at the rear end of the cylinder cover, a groove is formed in the center of the connecting part, a detection cavity is defined by the groove and the front end face of the testing cylinder body, and a liquid inlet is formed in the front end of the cylinder cover; a pressing plate, a testing rod and a spring assembly are arranged in the testing cylinder body, one end of the testing rod abuts against the pressing plate, the other end of the testing rod extends into the detection cavity in the axial direction, the testing rod is sleeved with the to-be-tested sealing ring, and the spring assembly is located on the side, away from the testing rod, of the pressing plate; a flow channel is formed between the binding surfaces of the test cylinder body and the cylinder cover, one end of the flow channel is communicated with the detection cavity, and the other end penetrates through the outer side wall of the test cylinder body. The utility model provides an easy-to-disassemble sealing element testing device, which can be used for carrying out sealing detection on an ultrahigh pressure sealing ring used in the pressurizing process of graphene slurry.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic seal test related equipment, in particular to an easily detachable seal test device. Background Art

[0002] Seals are extremely important components in the hydraulic field, which directly affect the sealing performance of various types of hydraulic equipment. In particular, ultra-high pressure sealing rings used in ultra-high pressure scenarios close to 200Mpa or even exceeding 200Mpa are required to have good sealing properties. Taking the high-pressure micro-jet homogenizer in the graphene field as an example, the ultra-high pressure sealing rings used therein need to be tested for sealing properties in advance before being put into use. In the prior art, an airtightness detector is generally used for sealing detection, but this existing sealing detection generally only considers detection in a pure liquid environment such as pure oil or pure water, and does not consider the sealing properties of the sealing ring used in a fluid containing particulate matter. Therefore, it is impossible to verify the sealing properties of the special ultra-high pressure sealing ring in a real graphene slurry environment. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent: to provide an easily detachable seal testing device, which can perform sealing detection on the ultra-high pressure sealing ring used in the pressurization process of graphene slurry.

[0004] To this end, one object of the utility model is to provide an easily detachable seal testing device, which comprises a test cylinder and a cylinder cover, wherein the rear end of the cylinder cover extends radially to form a connecting portion matching the front end of the test cylinder, the center position of the connecting portion is axially concave to form a groove for accommodating a seal ring to be tested, the groove and the front end surface of the test cylinder form a detection cavity, the connecting portion is detachably connected to the test cylinder by a plurality of bolts arranged along the circumferential direction, the front end of the cylinder cover has a liquid inlet, the liquid inlet is connected to the detection cavity and the connecting portion is located on the side of the seal ring to be tested away from the test cylinder;

[0005] A pressure plate, a test rod and a spring assembly are provided in the test cylinder body. The pressure plate is axially slidably fitted in the test cylinder body. One end of the test rod abuts against the pressure plate, and the other end extends into the detection cavity along the axial direction, so that the sealing ring to be tested is sleeved outside the test rod. The spring assembly is located on the side of the pressure plate away from the test rod, and the two ends of the spring assembly abut against the pressure plate and the test cylinder body respectively.

[0006] A flow channel is formed between the fitting surfaces of the test cylinder body and the cylinder cover, one end of the flow channel is communicated with the detection cavity, and the other end of the flow channel passes through the outer wall of the test cylinder body.

[0007] According to an example of the utility model, the spring assembly includes an inner spring and an outer spring sleeved outside the inner spring. The outer spring is sleeved outside the inner spring to make the spring assembly's thrust on the pressure plate more stable, and because of the design of inner and outer springs, the tolerable pressure can be increased, providing a higher pressure reaction force, thereby meeting the high-pressure design requirements of the test pressure.

[0008] According to an example of the utility model, a guide column is provided in the test cylinder body on a side of the pressure plate away from the test rod, one end of the guide column is connected to the pressure plate, and the other end extends axially out of the test cylinder body.

[0009] According to an example of the utility model, the guide column is located on the outer side wall of the test cylinder body and has a scale line, and the scale line on the guide column is set so that the rear end face of the test cylinder body corresponds to the starting position on the scale line when the pressure plate drives the guide column to the left to the limit position. The scale line allows the compression stroke of the spring assembly to be intuitively read by the test personnel, which is convenient for data recording, and can also quickly calculate the actual pressure of the ultra-high pressure slurry in the test cavity when the spring assembly reaches a balanced static state.

[0010] According to an example of the present invention, an observation window for observing the spring assembly is provided on the outer side wall of the test cylinder.

[0011] According to an example of the utility model, a boss is provided on the front end surface of the test cylinder body at a position corresponding to the groove, and the boss and the groove together form the detection cavity. By providing the boss, the test rod can be accurately aligned with the center hole of the seal ring to be tested in the detection cavity during the assembly process of the cylinder cover and the cylinder body, so that the assembly accuracy of the test rod and the seal ring to be tested is improved, and the misjudgment of poor sealing of the seal ring to be tested due to improper assembly of the test rod is reduced.

[0012] According to an example of the utility model, a discharge block is provided in the detection chamber on the side of the seal ring to be tested away from the test cylinder body, the discharge block has a central hole for the test rod to pass through, and the discharge block has a card slot connected to the central hole. By providing the discharge block and the card slot provided on the discharge block, the seal ring to be tested can be conveniently pulled out of the detection chamber through the card slot on the discharge block after the test is completed, reducing the inconvenience of the disassembly process of the seal ring after the test and the accidental damage caused thereby.

[0013] According to an example of the present utility model, the left end surface of the unloading block facing away from the test cylinder body is concave to form a slot, and the center hole is connected to the bottom position of the slot.

[0014] The above technical scheme has the following advantages or beneficial effects: First, for the sealing ring to be tested, the working environment of the ultra-high pressure slurry can be truly restored, thereby detecting the sealing performance of the sealing ring to be tested under various slurry pressure conditions; secondly, by setting the design of the inner spring and the outer spring, the force applied by the spring assembly to the pressure plate is more stable; thirdly, scale lines are added to the guide column so that the compression stroke of the spring can be observed intuitively by the naked eye of the person being tested, which is convenient for quick recording and calculation; finally, by adding a unloading block, the sealing ring to be tested can apply a pulling force to the card slot through an external pull rod after the test is completed to complete the disassembly of the unloading block and the sealing ring, while also reducing the risk of damage to the sealing ring during the disassembly process after the test is completed.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the easily detachable sealing component testing device of the utility model.

[0017] Figure 2 It is the front view of the easily removable seal test device.

[0018] Figure 3 for Figure 2 Schematic cross-sectional view along the “AA” direction.

[0019] Figure 4 for Figure 2 Schematic cross-sectional view in the "BB" direction.

[0020] Figure 5 for Figure 4 A partial enlarged schematic diagram of the "C" area in the middle.

[0021] Among them, 1. test cylinder body; 2. cylinder head; 3. connection part; 4. detection chamber; 5. bolt; 6. liquid inlet; 7. pressure plate; 8. test rod; 9. guide column; 10. inner spring; 11. outer spring; 12. sealing ring to be tested; 13. flow channel; 14. scale line; 15. observation window; 16. boss; 17. unloading block; 17.1. center hole; 17.2. slot. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] The following is a detailed description of the easily detachable seal testing device according to an embodiment of the utility model with reference to the accompanying drawings.

[0024] The utility model provides an easily detachable seal testing device, such as Figure 1-4 As shown, it includes a test cylinder 1 and a cylinder head 2, the rear end of the cylinder head 2 extends radially outward to form a connecting portion 3 that matches the outer contour size of the front end of the test cylinder 1, and the center position of the right end face of the connecting portion 3 has a groove formed by axial inward concave, when the right end face of the connecting portion 3 fits with the front end face of the test cylinder, the groove and the front end face of the test cylinder 1 are surrounded to form a detection cavity 4, and the detection cavity 4 is used to accommodate a sealing ring 12 to be tested, the connecting portion 3 is detachably connected to the test cylinder 1 by a plurality of bolts 5 arranged along the circumferential direction, and the front end of the cylinder head 2 has a liquid inlet 6, which is connected to the detection cavity 4 and the connection point is located on the side of the sealing ring 12 to be tested away from the test cylinder 1, as shown in FIG. Figure 3 and Figure 4 As shown, when the seal ring 12 to be tested is placed in the test chamber 4, a cavity is left in the area of ​​the test chamber 4 located on the left side of the seal ring 12 to be tested, and the liquid inlet 6 is connected to the cavity. Preferably, the liquid inlet 6 is connected to the center of the left end surface of the test chamber 4.

[0025] The test cylinder 1 is provided with a balance chamber, in which a pressure plate 7, a test rod 8, a guide column 9 and a spring assembly are provided. The pressure plate 7 is axially slidably fitted in the balance chamber of the test cylinder 1, and the test rod 8 and the guide column 9 are arranged on both sides of the pressure plate 7. Figure 3 and Figure 4 As shown, the test rod 8 is located on the left side of the pressure plate, the right end of the test rod 8 is against the pressure plate 7, and the left end thereof extends axially into the detection chamber 4, and the sealing ring 12 to be tested is sleeved on the outside of the test rod 8, and the guide column 9 and the spring assembly are both located on the right side of the pressure plate 7, and the two ends of the spring assembly are respectively against the pressure plate 7 and the test cylinder body 1, thereby making the pressure plate 7 have a tendency to move to the left under the action of the elastic reset force of the spring assembly itself, one end of the guide column 9 is connected to the pressure plate 7, and the other end extends axially outside the test cylinder body 1, and the right end of the test cylinder body 1 is located on the moving path of the guide column 9 and has a guide hole for the right end of the guide column 9 to pass through to the outside of the test cylinder body 1.

[0026] like Figure 1 and 4 As shown, the fitting surfaces of the test cylinder body 1 and the cylinder cover 2 enclose a flow channel 13 , one end of which is connected to the detection chamber 4 , and the other end of which passes through the outer wall of the test cylinder body 1 .

[0027] In the above-mentioned present embodiment, the liquid inlet 6 is connected to the feeding device of the graphene slurry. Specifically, the liquid inlet 6 is provided with a high-pressure joint, which is connected to the feeding pipeline through the high-pressure joint, thereby supplying ultra-high-pressure graphene slurry into the detection chamber 4 through the liquid inlet 6, thereby simulating the real ultra-high-pressure working environment of graphene. If the sealing performance of the sealing ring 12 to be tested does not meet the standard, the high-pressure graphene slurry that enters the detection chamber 4 and is located on the left side of the sealing ring 12 to be tested will seep out from the gap between the test rod 8 and the sealing ring 12 to be tested, and finally flow out to the outer wall of the cylinder body through the flow channel 13. The test personnel can judge the sealing performance of the sealing ring 12 to be tested by observing whether there is slurry overflow at the outlet of the flow channel 13 on the outer wall of the test cylinder 1. In this embodiment, the test rod 8 adopts the same structure as the probe corresponding to the actual use process of the sealing ring 12 to be tested, so that the sealing verification of the sealing ring 12 to be tested can be closer to the actual use state.

[0028] Based on the preference of the spring assembly of the above embodiment, the spring assembly includes an inner spring 10 sleeved outside the guide column 9 and an outer spring 11 sleeved outside the inner spring 10. In this embodiment, the thrust applied by the spring assembly to the pressure plate 7 is a balancing force for the test rod 8 to overcome the pressure of the ultra-high pressure slurry on the test rod 8 and maintain a stationary state, that is, the thrust applied by the spring assembly to the pressure plate 7 and the pressure applied by the ultra-high pressure slurry in the detection chamber 4 to the test rod 8 are mutually reactive forces, thereby enabling the test rod 8 to remain stationary relative to the test cylinder 1, thereby achieving the purpose of testing the sealing performance of the sealing ring 12 to be tested. By adding an outer spring 11 outside the inner spring 10, the thrust applied by the spring assembly to the pressure plate 7 is larger and more stable.

[0029] Based on the above preferred embodiments, Figure 3 and Figure 4As shown, the guide column 9 is located on the outer side wall outside the test cylinder 1 and has a scale line 14. The scale line 14 on the guide column 9 is set so that when the pressure plate 7 drives the guide column 9 to the left to the limit position, the rear end face of the test cylinder 1 corresponds to the starting position on the scale line 14, that is, the rear end face of the test cylinder 1 corresponds to the zero value on the scale line 14. As the ultra-high pressure slurry flows into the detection chamber 4, the ultra-high pressure slurry applies an axial rightward pressure to the test rod 8, thereby causing the test rod 8 to drive the pressure plate 7 and the guide column 9 to move to the right against the elastic force of the spring assembly. As the spring in the spring assembly is continuously compressed, the elastic reset force provided by the spring assembly continues to increase until the elastic reset force is the same as the pressure applied by the ultra-high pressure slurry to the test rod 8, and the guide column 9 remains stationary. The scale line 14 on the outer side wall of the guide column 9 enables the inspection personnel to clearly observe the length of the extended part of the guide column 9, thereby calculating the compression of the spring assembly, and then calculating the pressure of the ultra-high pressure slurry. Finally, the test personnel can clearly record the actual pressure value of the ultra-high pressure slurry during each test. This calculation process is just a conventional calculation process of the relationship between the spring compression and the pressure, so it will not be elaborated one by one.

[0030] Furthermore, an observation window 15 for observing the spring assembly is provided on the outer side wall of the test cylinder 1. Through the observation window 15, the compression amount of the spring assembly can be visually seen.

[0031] like Figure 3 and Figure 4 As shown, a boss 16 is provided on the front end surface of the test cylinder body 1 at a position corresponding to the groove, and the boss 16 and the groove together form the detection chamber 4. Through the mutual insertion of the boss 16 and the groove, the position accuracy of the test rod 8 can be better guaranteed, so that the test rod 8 is accurately aligned with the center hole position of the sealing ring 12 to be tested, avoiding the influence of the position deviation of the test rod 8 on the sealing test.

[0032] During the actual test, the sealing ring 12 to be tested needs to be installed in the groove of the cylinder head 2 before the cylinder head 2 is connected to the test cylinder body, and then the cylinder head 2 and the test cylinder body 1 are fixedly connected to each other to finally complete the sealing test. However, after the test is completed, the sealing ring 12 to be tested in the cylinder head 2 is not easy to remove, and the removal process is also very likely to cause damage to the sealing ring 12 to be tested. For this reason, based on how to remove the sealing ring after the test without damage in the above embodiment, the following improvements are made: a unloading block 17 is provided in the detection chamber 4 on the side of the sealing ring 12 to be tested away from the test cylinder body 1, and the unloading block 17 has a center hole 17.1 for the test rod 8 to pass through, and the unloading block 17 has a slot 17.2 connected to the center hole 17.1. In this embodiment, due to the addition of the unloading block 17, after the sealing ring 12 to be tested is tested, it is only necessary to push out the test rod 8 first, and then select a pull rod with a size smaller than the test rod 8, the head of the pull rod axially extends into the center hole of the sealing ring 12 to be tested, and the head of the pull rod has a barb matching the slot 17.2. When the head of the pull rod extends to the position of the unloading block 17, the barb of the pull rod head is engaged with the slot 17.2 on the unloading block 17, thereby the unloading block 17 connected to the sealing ring can be conveniently pulled out through the pull rod.

[0033] Furthermore, if Figure 5 As shown, the unloading block 17 is an annular structure, and has a center hole 17.1 at the center position of the unloading block 17. The aperture of the center hole 17.1 on the unloading hole 17 is slightly larger than the aperture of the center hole of the sealing ring 12 to be tested. The left end surface of the unloading block 17 facing away from the test cylinder body 1 is concave to form a groove 17.2, and the center hole 17.1 is connected to the bottom position of the groove 17.2.

[0034] It should be noted here that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean 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, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0040] For those skilled in the art, various changes and modifications will undoubtedly be obvious after reading the above description. Therefore, the attached claims should be regarded as covering all changes and modifications to the true intent and scope of the utility model. Any and all equivalent ranges and contents within the scope of the claims should be considered to still be within the intent and scope of the utility model.

Claims

1. A detachable seal testing device, characterized in that: The invention comprises a test cylinder (1) and a cylinder cover (2), wherein the rear end of the cylinder cover (2) extends radially to form a connecting portion (3) matching the front end of the test cylinder (1), the center of the connecting portion (3) is axially concave to form a groove for accommodating a sealing ring (12) to be tested, the groove and the front end surface of the test cylinder (1) together form a detection cavity (4), the connecting portion (3) is detachably connected to the test cylinder (1) via a plurality of bolts (5) arranged in the circumferential direction, the front end of the cylinder cover (2) has a liquid inlet (6), the liquid inlet (6) is connected to the detection cavity (4), and the connecting portion is located on the side of the sealing ring (12) to be tested facing away from the test cylinder (1); The test cylinder (1) is provided with a pressure plate (7), a test rod (8) and a spring assembly. The pressure plate (7) is axially slidably fitted in the test cylinder (1). One end of the test rod (8) is connected to the pressure plate (7), and the other end extends into the detection chamber (4) along the axial direction, so that the sealing ring (12) to be tested is sleeved outside the test rod (8). The spring assembly is located on a side of the pressure plate (7) away from the test rod (8), and the two ends of the spring assembly are respectively against the pressure plate (7) and the test cylinder (1); The fitting surfaces of the test cylinder body (1) and the cylinder cover (2) enclose a flow channel (13), one end of the flow channel (13) is connected to the detection chamber (4), and the other end passes through the outer wall of the test cylinder body (1).

2. The easily detachable seal testing device according to claim 1, characterized in that: The spring assembly comprises an inner spring (10) and an outer spring (11) sleeved outside the inner spring (10).

3. The easily detachable seal testing device according to claim 1, characterized in that: A guide column (9) is provided in the test cylinder (1) on the side of the pressure plate (7) away from the test rod (8); one end of the guide column (9) is connected to the pressure plate (7), and the other end extends axially outside the test cylinder (1).

4. The easily detachable seal testing device according to claim 3, characterized in that: The guide column (9) is provided with a scale line (14) on the outer side wall outside the test cylinder (1), and the scale line (14) on the guide column (9) is arranged so that when the pressure plate (7) drives the guide column (9) to move to the left to the limit position, the rear end surface of the test cylinder (1) corresponds to the starting position on the scale line (14).

5. The easily detachable seal testing device according to claim 1, characterized in that: An observation window (15) for observing the spring assembly is provided on the outer side wall of the test cylinder (1).

6. The easily detachable seal testing device according to claim 1, characterized in that: A boss (16) is provided on the front end surface of the test cylinder body (1) at a position corresponding to the groove, and the boss (16) and the groove together form the detection cavity (4).

7. The easily detachable seal testing device according to claim 1, characterized in that: A discharge block (17) is provided in the detection chamber (4) on the side of the seal ring (12) to be tested facing away from the test cylinder body (1), the discharge block (17) having a center hole (17.1) for the test rod (8) to pass through, and a slot (17.2) communicating with the center hole (17.1).

8. The easily detachable seal testing device according to claim 7, characterized in that: The left end surface of the discharge block (17) facing away from the test cylinder body (1) is concave to form a slot (17.2), and the center hole (17.1) is connected to the bottom of the slot (17.2).

9. The easily detachable seal testing device according to claim 1, characterized in that: One end of the test rod (8) abuts against the pressing plate (7).

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