Blue oil test device for lifting type check valve

Abstract

The utility model discloses a blue oil test device for a lifting type check valve. The blue oil test device comprises a bottom plate, a guide sleeve, a lifting rod and an anti-rebound assembly, according to the lifting type check valve blue oil test device, the blue oil test can be carried out only by installing the valve clack on the lifting rod, assembling is easy and convenient, time and labor are saved in the blue oil test, the lifting rod is arranged to fully simulate the phenomenon that the check valve is seated through the dead weight of the valve clack, the blue oil test of the lifting type check valve is standardized and accurate, and the working efficiency is improved. Accuracy and reliability of blue oil test results are effectively guaranteed, and maintenance quality of equipment is improved. Meanwhile, an anti-rebound assembly is further arranged and used for preventing a valve clack of the check valve from rebounding after colliding with a valve seat of the check valve, the safety in the blue oil test process is guaranteed, the damage probability of the device is reduced, and if the device is located in a high-dose area, the irradiation dose of workers can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of maintenance of a lifting check valve, in particular to a lifting check valve blue oil testing device. Background Art

[0002] The check valve (one-way valve) is an automatic device commonly used in industrial system pipelines. Its main features are: allowing the medium to pass through in the forward flow and being blocked in the reverse flow, that is, only one direction is allowed to flow. The function of the check valve in the system is to prevent the medium from flowing back, to ensure that the pump maintains its initial state after stopping operation, and to prevent the pump from reversing and causing damage to components due to the "flash" reflux of the medium in the downstream pipe; for the above reasons, the check valve is required to close quickly and have good stability, and avoid places with large medium disturbance as much as possible; the check valve can also be used on pipelines that provide supply to auxiliary systems that exceed the main system pressure. The displacement direction of the lifting check valve closing member (valve disc) is perpendicular to the valve seat plane, and the seat force is generated by the valve disc's own weight (or with a booster spring).

[0003] In the existing maintenance method, the blue oil test is carried out together with the valve cover and the valve disc assembly. The blue oil test process requires pressing the valve disc downward by a hand wheel to make the valve disc sealing surface contact with the valve seat sealing surface. It is impossible to simulate the check valve seating by its own weight, and the blue oil test result is unreliable. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a lifting type check valve blue oil testing device.

[0005] The technical solution adopted by the utility model to solve the technical problem is: constructing a lifting check valve blue oil test device, which includes:

[0006] A base plate, mounted on the valve body of the check valve;

[0007] A guide sleeve is mounted on the bottom plate, and a positioning hole is formed on the guide sleeve;

[0008] A lifting rod is inserted into the positioning hole and can move along the axial direction of the positioning hole, and one end of the lifting rod is connected to the valve disc of the check valve;

[0009] The anti-rebound component is installed on the lifting rod and is used to prevent the valve disc of the check valve from rebounding after colliding with the valve seat of the check valve.

[0010] In some embodiments, a through hole is opened on the bottom plate, and the central axis of the through hole is consistent with the central axis of the positioning hole.

[0011] In some embodiments, the guide sleeve comprises:

[0012] A mounting portion, which is mounted on the base plate through a first fastener;

[0013] The guide portion is located at the lower side of the mounting portion and penetrates the through hole. The positioning hole penetrates the mounting portion and the guide portion.

[0014] In some embodiments, the lifting rod comprises:

[0015] A penetration portion, which is penetrated in the positioning hole, and the penetration portion and the positioning hole are in clearance fit;

[0016] The connecting portion is located at the lower side of the penetration portion and is used to be connected to the valve disc of the check valve through a second fastener.

[0017] In some embodiments, a plug hole is provided on the penetration portion, and the lifting check valve blue oil testing device further comprises a pin plugged into the plug hole, and the pin is used to fix the position of the penetration portion.

[0018] In some embodiments, the anti-rebound assembly includes two snap ring members, two first elastic members, and a second elastic member;

[0019] The two clamping rings are connected together through the two first elastic members;

[0020] One end of the second elastic member is connected to the two clamping ring members, and one end of the second elastic member away from the clamping ring member is fixedly connected to the penetration portion or the connecting portion;

[0021] When the lifting rod is in a lifting state, the two first elastic members are in a stretched state, the two clamping ring members are sleeved on the peripheral side wall surface of the guide portion, and there is a preset friction force between the two clamping ring members and the peripheral side wall surface of the guide portion;

[0022] When the lifting rod is in a descending state, the two first elastic members are in a compressed state, and the top surfaces of the two clamping ring members abut against the bottom end surface of the guide portion.

[0023] In some embodiments, a hanging ear is connected to the penetration portion.

[0024] In some embodiments, a boss is provided at the bottom of the base plate, the shape of the boss matches the shape of the inner cavity of the valve body of the check valve, and the boss is used to ensure the alignment of the valve disc of the check valve and the valve seat of the check valve.

[0025] In some embodiments, the base plate is mounted on the valve body of the check valve via a third fastener, and a mounting hole for the third fastener to pass through is provided on the base plate.

[0026] In some embodiments, the height of the positioning hole is not less than 60 mm.

[0027] The implementation of the utility model has the following beneficial effects: using the lifting check valve blue oil test device, the blue oil test can be carried out by simply installing the valve disc on the lifting rod. The assembly is simple, and the blue oil test is time-saving and labor-saving. The setting of the lifting rod fully simulates the phenomenon of the check valve seating by the valve disc's own weight, standardizing and refining the blue oil test of the lifting check valve, effectively ensuring the accuracy and reliability of the blue oil test results, and improving the maintenance quality of the equipment. At the same time, an anti-rebound component is also provided to prevent the valve disc of the check valve from rebounding after colliding with the valve seat of the check valve, ensuring the safety during the blue oil test, reducing the probability of device damage, and if the device is located in a high-dose area, it can reduce the radiation dose of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0029] Figure 1 It is a three-dimensional structural diagram of a lifting check valve blue oil test device in some embodiments of the utility model in a lifting state;

[0030] Figure 2 It is a three-dimensional structural diagram of a lifting check valve blue oil test device in some embodiments of the utility model in a descending state;

[0031] Figure 3 It is a cross-sectional structural diagram of a lifting check valve blue oil test device in some embodiments of the utility model in a lifting state;

[0032] Figure 4 It is a schematic diagram of the structure of the bottom plate in some embodiments of the utility model;

[0033] Figure 5 It is a schematic diagram of the structure of the guide sleeve in some embodiments of the utility model;

[0034] Figure 6 It is a schematic diagram of the structure of the lifting rod in some embodiments of the utility model;

[0035] Figure 7 It is a schematic diagram of the structure of the anti-rebound component in some embodiments of the utility model. DETAILED DESCRIPTION

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0037] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0038] See also Figures 1 to 7 The utility model discloses a lifting check valve blue oil test device. The blue oil test refers to: applying a layer of Prussian blue oil on the valve disc 4, and then installing the valve disc 4 into the valve cavity, so that the valve disc sealing surface is in contact with the valve seat sealing surface, and the blue oil indentation on the valve disc 4 and the valve seat sealing surface is used to check the fitting of the sealing surface, that is, the "blue oil test". The lifting check valve blue oil test device includes a base plate 1, a guide sleeve 2, a lifting rod 3 and an anti-rebound component 5. The base plate 1 is installed on the valve body of the check valve. The base plate 1 can be installed on the valve body of the check valve through a third fastener 13. The base plate 1 is provided with a mounting hole 14 for the third fastener 13 to penetrate. The number of the mounting holes 14 is two, and the spacing between the two mounting holes 14 is consistent with the center diameter of the circumferential bolts of the valve body. The base plate 1 is about 20 mm thick to ensure that it can bear the weight of the valve disc 4 and the entire lifting check valve blue oil test device when performing the blue oil test.

[0039] like Figure 4As shown, a boss 11 is provided at the bottom of the base plate 1, and the shape of the boss 11 matches the shape of the inner cavity of the valve body of the check valve. The boss 11 is used to ensure the centering of the valve flap 4 of the check valve and the valve seat of the check valve. In this embodiment, the boss 11 includes two arc bosses, and the outer diameter formed by the two arc bosses is smaller than the inner diameter of the inner cavity of the valve body of the check valve. The two arc bosses cooperate to ensure the centering of the valve flap 4 of the check valve and the valve seat of the check valve. When the base plate 1 is installed on the valve body of the check valve, the two arc bosses are clamped into the inner cavity of the valve body of the check valve. Since the outer diameter formed by the two arc bosses is slightly smaller than the inner diameter of the inner cavity of the valve body of the check valve, this is used as a centering guide for the blue oil test, ensuring the centering of the valve flap 4 of the check valve and the valve seat of the check valve. In some other embodiments, the shape of the boss 11 can also be elliptical, rectangular or other shapes, as long as it matches the shape of the inner cavity of the valve body of the check valve, and no specific limitation is made here.

[0040] like Figure 5 As shown, the guide sleeve 2 is mounted on the base plate 1, and a positioning hole 21 is provided on the guide sleeve 2. The positioning hole 21 is located at the center of the guide sleeve 2. A through hole 12 is provided on the base plate 1. The central axis of the through hole 12 is consistent with the central axis of the positioning hole 21. The through hole 12 is located at the center of the base plate 1. The guide sleeve 2 includes an integrally formed mounting portion 22 and a guide portion 23. The mounting portion 22 is mounted on the base plate 1 through a first fastener 24 to avoid the influence of the blue oil test due to the shaking of the guide sleeve 2. The first fastener 24 can be a bolt, and the guide portion 23 is located at the lower side of the mounting portion 22 and penetrates the through hole 12. The positioning hole 21 is penetrated in the mounting portion 22 and the guide portion 23. The diameter of the mounting portion 22 is larger than the diameter of the guide portion 23. The guide portion 23 and the through hole 12 are clearance-matched. The diameter of the guide portion 23 is slightly smaller than the diameter of the through hole 12. The guide sleeve 2 is preferably made of copper.

[0041] Furthermore, the lifting rod 3 is inserted into the positioning hole 21 and can move along the axial direction of the positioning hole 21, and one end of the lifting rod 3 is connected to the valve flap 4 of the check valve. Figure 6As shown, the lifting rod 3 specifically includes an integrally formed penetration portion 31 and a connecting portion 32, the penetration portion 31 is penetrated in the positioning hole 21, and the connecting portion 32 is located at the lower side of the penetration portion 31, and is used to connect with the valve disc 4 of the check valve through the second fastener 33. In this embodiment, the penetration portion 31 is a cylinder with a diameter of 38mm and a length of 220mm, and the outer surface roughness is required to be no more than 3.2, so as to ensure that there will be no straining phenomenon when it moves relative to the guide sleeve 2, and avoid affecting the authenticity of the blue oil test due to excessive roughness. The connecting portion 32 is a rectangular parallelepiped with a length of 80mm, a width of 38mm, and a thickness of 10mm, and there are two through holes with a diameter of 13mm on it. The second fastener 33 is installed in this through hole to facilitate the installation between the connecting portion 32 and the valve disc 4. The lifting rod 3 is connected to the valve disc 4 through the second fastener 33, which is consistent with the connection method after the actual assembly of the valve, and is convenient for the execution of the blue oil test.

[0042] In addition, the penetration portion 31 and the positioning hole 21 have a clearance fit, and the clearance between the penetration portion 31 and the positioning hole 21 needs to be combined with the clearance between the valve flap 4 and the actual guide, and this clearance is required to be smaller than the clearance between the valve flap 4 and the actual guide, so as to fully simulate the clearance between the valve flap 4 and the actual guide on site, thereby achieving the effect of checking the true sealing of the valve flap 4 and the valve seat. The height of the positioning hole 21 is not less than 60 mm to prevent inaccurate guidance due to a short guide distance, and the upper and lower sides of the positioning hole 21 need to be chamfered to reduce interference with the lifting rod 3 during the blue oil test.

[0043] Furthermore, a plug hole 311 is provided on the penetration portion 31, and the lifting check valve blue oil test device also includes a pin 6 plugged into the plug hole 311, and the pin 6 is used to fix the position of the penetration portion 31. The plug hole 311 runs through the circumferential end surface of the penetration portion 31, and the plug 6 is cylindrical as a whole, and the diameter is required to have a predetermined gap with the plug hole 311, and the length is required to be greater than the diameter of the mounting portion 22, and both ends of the plug 6 need to be chamfered to facilitate insertion into the plug hole 311. In addition, one end of the plug 6 has a small hole, and the plug 6 can be connected to this lifting check valve blue oil test device through an iron wire. Among them, the position of the plug hole 311 has a height requirement. After the plug 6 is inserted and the lifting check valve blue oil test device is installed as a whole to the valve body, the height from the valve disc 4 to the valve seat must be less than or equal to the actual valve stroke.

[0044] In some embodiments, the penetration portion 31 is connected to a lifting ear 7. More specifically, the top of the penetration portion 31 has an M20 internal thread, which can be used to install the lifting ear 7. When the overall weight of the lifting check valve blue oil test device is large, other lifting equipment can be used to connect to the lifting ear 7 to conduct a blue oil test.

[0045] like Figure 7As shown, the anti-rebound component 5 is installed on the lifting rod 3 to prevent the valve disc 4 of the check valve from rebounding after colliding with the valve seat of the check valve. The anti-rebound component 5 includes two clamping rings 51, two first elastic members 52 and a second elastic member 53. The two clamping rings 51 are connected together by the two first elastic members 52, one end of the second elastic member 53 is connected to the two clamping rings 51, and the end of the second elastic member 53 away from the clamping ring 51 is fixedly connected to the penetration portion 31 or the connection portion 32. Figure 1 As shown, when the lifting rod 3 is in the lifting state, the two first elastic members 52 are in the stretched state, the two clamping ring members 51 are sleeved on the peripheral side wall surface of the guide portion 23, and there is a preset friction force between the two clamping ring members 51 and the peripheral side wall surface of the guide portion 23; Figure 2 As shown, when the lifting rod 3 is in the descending state, the two first elastic members 52 are in a compressed state, and the top surfaces of the two clamping ring members 51 abut against the bottom end surface of the guide portion 23. The end of the second elastic member 53 away from the clamping ring member 51 is fixedly mounted on the lifting rod 3 through a fixed connecting member, so that the anti-rebound assembly 5 can be lowered together with the lifting rod 3.

[0046] Understandably, if Figure 7 As shown, there is a certain gap between the two snap rings 51, and the two snap rings 51 and the two first elastic members 52 are all located above the second elastic member 53, the middle parts of the two first elastic members 52 are connected to the upper end surface of the second elastic member 53, and the two first elastic members 52 are used to pull the two snap rings 51. Before performing the blue oil test, the clamping ring 51 is clamped on the circumferential wall of the guide part 23. At this time, the two first elastic members 52 are in a stretched state, and the two clamping rings 51 also have a preset friction force with the circumferential wall of the guide part 23 under the elastic force of the two first elastic members 52. When performing the blue oil test, the lifting rod 3 drives the entire anti-rebound assembly 5 to descend together. During the falling process, the second elastic member 53 pulls the first elastic member 52, causing the first elastic member 52 to contract. At this time, when the two clamping rings 51 descend to the lower part of the bottom end surface of the guide part 23, the first elastic member 52 contracts, resulting in a decrease in the area of ​​the space formed between the two clamping rings 51. At this time, the area of ​​the space is smaller than the cross-sectional area of ​​the guide part 23, so that the two clamping rings 51 cannot move upward, and thus abut against the bottom end surface of the guide part 23, which can achieve the effect of preventing the valve disc 4, the lifting rod 3, etc. from moving upward, and play an anti-rebound role. The second elastic member 53 also produces a certain buffering effect after the valve disc collides with the valve seat. In addition, the second elastic member 53 of the anti-rebound assembly 5 is not compressed before the blue oil test, that is, the lifting rod 3 is in the lifting state, that is, the anti-rebound assembly 5 as a whole is not subjected to downward thrust before the valve flap 4 falls. In this embodiment, the first elastic member 52 and the second elastic member 53 are both springs.

[0047] In general, the lifting rod 3 is connected to the valve disc 4 through the second fastener 33, the lifting rod 3 passes through the positioning hole 21 in the guide sleeve 2, the ear 7 is installed on the top of the lifting rod 3, the guide sleeve 2 is fixed to the base plate 1 through the first fastener 24, the base plate 1 can be fixed to the valve body through the third fastener 13, and the pin 6 can be inserted into the lifting rod 3 or pulled out from the lifting rod 3 according to actual needs.

[0048] The specific working steps of the lifting check valve blue oil test device are as follows:

[0049] 1. Assemble the lifting check valve blue oil test device as a whole, insert the latch 6 into the lifting rod 3, and do not fix the whole device on the valve body;

[0050] 2. Apply a layer of Prussian blue oil on the valve disc 4;

[0051] 3. Fix the lifting check valve blue oil test device as a whole to the valve body through the third fastener 13;

[0052] 4. Pull out the latch 6 from the lifting rod 3, and the valve disc 4 and the lifting rod 3 fall down by their own weight;

[0053] 5. Lift the valve disc 4 and the lifting rod 3, and insert the latch 6;

[0054] 6. Remove the fixing bolts, lift the auxiliary blue oil tool out of the valve cavity as a whole, and check the blue oil condition.

[0055] The beneficial effects of the lifting check valve blue oil test device are as follows: using the lifting check valve blue oil test device, the blue oil test can be performed by simply installing the valve disc 4 on the lifting rod 3. The assembly is simple, and the blue oil test is time-saving and labor-saving. The setting of the lifting rod 3 fully simulates the phenomenon of the check valve seating by the valve disc 4 under its own weight, standardizes and refines the blue oil test of the lifting check valve, effectively ensures the accuracy and reliability of the blue oil test results, and improves the maintenance quality of the equipment. At the same time, an anti-rebound component 5 is also provided to prevent the valve disc 4 of the check valve from rebounding after colliding with the valve seat of the check valve, thereby ensuring the safety during the blue oil test and reducing the probability of device damage. If the device is located in a high-dose area, the radiation dose of the staff can be reduced, thereby improving work efficiency.

[0056] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A lifting check valve blue oil test device, characterized in that: include: A base plate (1) is mounted on the valve body of the check valve; A guide sleeve (2) is mounted on the base plate (1), and a positioning hole (21) is formed on the guide sleeve (2); A lifting rod (3) is inserted into the positioning hole (21) and is movable along the axial direction of the positioning hole (21), and one end of the lifting rod (3) is connected to the valve disc (4) of the check valve; An anti-rebound component (5) is mounted on the lifting rod (3) and is used to prevent the valve disc (4) of the check valve from rebounding after colliding with the valve seat of the check valve.

2. The lifting check valve blue oil testing device according to claim 1 is characterized in that: The bottom plate (1) is provided with a through hole (12), and the central axis of the through hole (12) is consistent with the central axis of the positioning hole (21).

3. The lifting check valve blue oil testing device according to claim 2 is characterized in that: The guide sleeve (2) comprises: A mounting portion (22) mounted on the base plate (1) via a first fastener (24); The guide portion (23) is located at the lower side of the mounting portion (22) and is penetrated through the through hole (12); the positioning hole (21) is penetrated through the mounting portion (22) and the guide portion (23).

4. The lifting check valve blue oil testing device according to claim 3 is characterized in that: The lifting rod (3) comprises: a penetration portion (31) which is penetrated in the positioning hole (21), the penetration portion (31) and the positioning hole (21) being clearance-matched; The connecting portion (32) is located at the lower side of the penetration portion (31) and is used to be connected to the valve disc (4) of the check valve via a second fastener (33).

5. The lifting check valve blue oil testing device according to claim 4 is characterized in that: The penetration portion (31) is provided with an insertion hole (311), and the lifting type check valve blue oil testing device further comprises a latch (6) plugged into the insertion hole (311), wherein the latch (6) is used to fix the position of the penetration portion (31).

6. The lifting check valve blue oil testing device according to claim 4 is characterized in that: The anti-rebound component (5) comprises two snap ring components (51), two first elastic components (52) and a second elastic component (53); The two clamping rings (51) are connected together via the two first elastic members (52); One end of the second elastic member (53) is connected to the two clamping ring members (51), and one end of the second elastic member (53) away from the clamping ring members (51) is fixedly connected to the penetration portion (31) or the connection portion (32); When the lifting rod (3) is in a lifting state, the two first elastic members (52) are in a stretched state, the two clamping ring members (51) are sleeved on the peripheral side wall surface of the guide portion (23), and a preset friction force exists between the two clamping ring members (51) and the peripheral side wall surface of the guide portion (23); When the lifting rod (3) is in a descending state, the two first elastic members (52) are in a compressed state, and the top surfaces of the two clamping ring members (51) abut against the bottom end surface of the guide portion (23).

7. The lifting check valve blue oil testing device according to claim 4 is characterized in that: The penetration portion (31) is connected to a lifting lug (7).

8. The lifting check valve blue oil testing device according to claim 1 is characterized in that: A boss (11) is provided at the bottom of the base plate (1); the shape of the boss (11) matches the shape of the inner cavity of the valve body of the check valve; the boss (11) is used to ensure that the valve disc (4) of the check valve is aligned with the valve seat of the check valve.

9. The lifting check valve blue oil testing device according to claim 1 is characterized in that: The base plate (1) is mounted on the valve body of the check valve via a third fastener (13); a mounting hole (14) for the third fastener (13) to pass through is provided on the base plate (1).

10. The lifting check valve blue oil testing device according to claim 1, characterized in that: The height of the positioning hole (21) is not less than 60 mm.

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