Butterfly valve off-line pressing device

Abstract

The utility model relates to the technical field of valve detection, in particular to an off-line pressing device for a butterfly valve. The butterfly valve off-line pressing device comprises a pressurizing assembly and a stretching assembly, one end of the pressurizing assembly is open and can be connected with one end of a butterfly valve, a cavity is formed in the other end of the pressurizing assembly in a protruding mode, the opening is communicated with the cavity, an inflation inlet communicated with the cavity is formed in the other end of the pressurizing assembly, and the stretching assembly is arranged at the other end of the butterfly valve. The stretching assembly is connected with the pressurizing assembly, and the stretching assembly can apply acting force to the pressurizing assembly so that the pressurizing assembly can abut against one end of the butterfly valve. Compared with the prior art, the pressurizing assembly and the stretching assembly are arranged at the two ends of the butterfly valve, the pressurizing assembly abuts against the butterfly valve through the stretching assembly, and the processes of bolt fastening and pretightening force adjusting are omitted; meanwhile, the pressurizing assembly is provided with the cavity in a protruding mode, interference on the valve element can be avoided, the detection time is shortened, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve detection, in particular to an offline pressure device for a butterfly valve. Background Art

[0002] After addressing the internal leakage issue of a pneumatic butterfly valve, it is necessary to perform an offline pressure test on the butterfly valve to verify its sealing before reinstalling it into the process system pipeline. The common method for offline pressure testing is to first place the butterfly valve in the closed position, then install a pressure flange on one side of the butterfly valve, and then inflate the pressure flange through the pressure pipeline. When the pressure gauge reaches the specified pressure, the air source is turned off to maintain the pressure. After a period of time, observe the pressure gauge. If the pressure does not drop, the butterfly valve is sealed properly.

[0003] However, since the pneumatic butterfly valve has many connecting bolts, the following problems will arise during offline pressurization: 1. A large number of bolts are needed to press the pressurization flange onto one side of the butterfly valve, and a wrench is often used to tighten the bolts one by one. This process is very time-consuming and labor-intensive; 2. Even if all the bolts have been tightened, it is still impossible to guarantee that the preload force of each bolt is exactly the same. If air leakage occurs in a place where the bolt preload force is small, the bolts at the leaking location need to be repeatedly tightened until there is no leakage, which greatly increases the maintenance time; 3. If the offline pressurization fails, the valve needs to be pneumatically opened to repair the sealing surface. After the repair is completed, the valve needs to be pneumatically closed again for offline pressurization. Since the pressurization flange blocks the rotation of the valve core, the process requires repeated disassembly and assembly of the pressurization flange, and the preload force of each bolt needs to be readjusted. The detection time is long and the detection efficiency is low.

[0004] Therefore, there is an urgent need for an offline pressure relief device for butterfly valves to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide an offline pressure testing device for butterfly valves, which can shorten the testing time and improve the testing efficiency.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A butterfly valve offline pressurizing device includes: a charging component and a stretching component, one end of the charging component is open and can be connected to one end of the butterfly valve, the other end of the charging component is convexly provided with a cavity, the opening is connected to the cavity, the other end of the charging component is provided with an inflation port connected to the cavity, the stretching component is arranged at the other end of the butterfly valve, the stretching component is connected to the charging component, and the stretching component can apply a force to the charging component so that the charging component and one end of the butterfly valve are offset.

[0008] As a preferred technical solution of the above-mentioned butterfly valve offline pressurizing device, the butterfly valve offline pressurizing device further includes a first sealing member, which is arranged between the charging assembly and the butterfly valve.

[0009] As an optimal technical solution of the above-mentioned butterfly valve offline pressing device, the butterfly valve offline pressing device also includes a second seal, which is arranged between the charging assembly and the butterfly valve, and the diameter of the second seal is smaller than that of the first seal.

[0010] As a preferred technical solution of the above-mentioned butterfly valve offline pressing device, the first sealing member and the second sealing member are both rubber pads.

[0011] As a preferred technical solution of the above-mentioned butterfly valve offline pressing device, the stretching assembly includes a first stretching member, a second stretching member and a driving member, the first stretching member is connected to the other end of the butterfly valve, one end of the second stretching member passes through the first stretching member and is connected to the charging assembly, and the second stretching member is slidingly connected to the first stretching member, and the driving member is arranged between the first stretching member and the second stretching member, and the driving member can drive the second stretching member to move relative to the first stretching member so that the charging assembly and the butterfly valve are offset or separated.

[0012] As a preferred technical solution of the above-mentioned butterfly valve offline pressing device, the driving component is a hydraulic cylinder.

[0013] As an optimal technical solution for the above-mentioned butterfly valve offline pressing device, the first stretching member includes a first flange, a mounting plate and several connecting rods. The first flange can be abutted against the end face of the butterfly valve. One end of the second stretching member passes through the first flange. The second stretching member is slidingly connected to the first flange. Several connecting rods are evenly arranged along the circumference of the first flange. The two ends of the connecting rods are respectively connected to the first flange and the mounting plate. The driving member is arranged between the mounting plate and the second stretching member.

[0014] As an optimal technical solution for the above-mentioned offline pressing device for a butterfly valve, the second stretching member includes a plurality of pull rods and a fixed plate, and the first flange is provided with a plurality of through holes evenly spaced along the circumference, and the plurality of through holes are arranged in a one-to-one correspondence with the plurality of pull rods. One end of the pull rod is connected to the fixed plate, and the other end of the pull rod passes through the through hole and is connected to the pressurizing assembly, and the pull rod is slidably connected to the first flange, and the driving member is arranged between the mounting plate and the fixed plate.

[0015] As an optimal technical solution for the above-mentioned butterfly valve offline pressing device, the first stretching member also includes a plurality of mounting members, and the plurality of mounting members are arranged on the mounting plate. The stretching assembly is provided with a plurality of driving members, and the plurality of driving members are arranged in a one-to-one correspondence with the plurality of mounting members, and the driving members are arranged on the mounting members.

[0016] As an optimal technical solution of the above-mentioned butterfly valve offline pressing device, the butterfly valve offline pressing device includes a second flange, which is protruded from the opening periphery of the charging component, and the stretching component is connected to the second flange.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides an offline pressurizing device for butterfly valves. The offline pressurizing device for butterfly valves includes: a charging component and a stretching component. One end of the charging component is open and can be connected to one end of the butterfly valve. The other end of the charging component is convexly provided with a cavity, and the opening is connected to the cavity. The other end of the charging component is provided with an inflation port connected to the cavity. The stretching component is provided at the other end of the butterfly valve. The stretching component is connected to the charging component, and the stretching component can give the charging component a force so that the charging component and one end of the butterfly valve are abutted. Compared with the existing technology, this device arranges the charging component and the stretching component at both ends of the butterfly valve, and the stretching component causes the charging component to abut against the butterfly valve, which reduces the process of tightening the bolts and adjusting the preload force; at the same time, the charging component is convexly provided with a cavity, which can avoid interference with the valve core and improve detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a butterfly valve offline pressure relief device provided by an embodiment of the present utility model;

[0021] Figure 2 A cross-sectional view of the structure of the butterfly valve offline pressure device provided by an embodiment of the utility model;

[0022] Figure 3 for Figure 2 A partial enlarged view of middle A;

[0023] Figure 4 A schematic structural diagram of a pressurizing assembly provided in an embodiment of the present utility model;

[0024] Figure 5 This is a schematic structural diagram of the first tensile member provided in an embodiment of the present utility model.

[0025] In the picture:

[0026] 1. Pressurizing assembly; 11. Cavity; 12. Inflating port;

[0027] 2. Tensile assembly; 21. First tensile member; 211. First flange; 2111. Through hole; 212. Mounting plate; 213. Connecting rod; 214. Mounting member; 22. Second tensile member; 221. Pull rod; 222. Fixing plate; 223. Bushing; 224. Fixing pin; 23. Driving member;

[0028] 3. First seal;

[0029] 4. Second sealing member;

[0030] 5. Second flange; 51. Connection hole;

[0031] 6. Butterfly valve. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0033] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0036] like Figures 1 to 5 As shown, the utility model provides an offline pressing device for butterfly valves. The offline pressing device for butterfly valves includes: a charging component 1 and a stretching component 2. Specifically, one end of the charging component 1 is open and can be connected to one end of the butterfly valve 6. The other end of the charging component 1 is provided with a cavity 11, and the opening is connected to the cavity 11. The other end of the charging component 1 is provided with an inflation port 12 connected to the cavity 11. The stretching component 2 is provided at the other end of the butterfly valve 6. The stretching component 2 is connected to the charging component 1, and the stretching component 2 can give the charging component 1 a force so that the charging component 1 is against one end of the butterfly valve 6. Compared with the prior art, the device arranges the charging component 1 and the stretching component 2 at both ends of the butterfly valve 6, and the stretching component 2 makes the charging component 1 abut against the butterfly valve 6, which reduces the process of tightening the bolts and adjusting the preload force; at the same time, the charging component 1 is provided with a cavity 11, which can avoid interference with the valve core, reduce the detection time, and improve the detection efficiency.

[0037] Optionally, the butterfly valve offline pressurizing device further includes a first seal 3, which is disposed between the pressurizing component 1 and the butterfly valve 6, and can improve the sealing performance of the connection between the pressurizing component 1 and the butterfly valve 6 to prevent air leakage.

[0038] Furthermore, the butterfly valve offline pressurization device includes a second seal 4, which is positioned between the charging assembly 1 and the butterfly valve 6. The diameter of the second seal 4 is smaller than that of the first seal 3. This double-layer seal further enhances the tightness of the connection between the charging assembly 1 and the butterfly valve 6, preventing air leakage. Furthermore, both the first seal 3 and the second seal 4 are rubber pads.

[0039] Optionally, the charging component 1 is provided with an annular protrusion, and the butterfly valve 6 is provided with an annular groove. The annular protrusion can be inserted into the annular groove. The second seal 4 is provided on the end face of the annular protrusion, and the first seal 3 is provided on the end face of the outer periphery of the annular protrusion. When the annular protrusion is inserted into the annular groove, the first seal 3 and the second seal 4 are squeezed and deformed, which can prevent air leakage, and the annular protrusion and the annular groove structure can improve the sealing performance of the connection between the charging component 1 and the butterfly valve 6.

[0040] Optionally, the stretching assembly 2 includes a first stretching member 21, a second stretching member 22 and a driving member 23, wherein the first stretching member 21 is connected to the other end of the butterfly valve 6, one end of the second stretching member 22 passes through the first stretching member 21 and is connected to the charging assembly 1, and the second stretching member 22 is slidably connected to the first stretching member 21, and the driving member 23 is arranged between the first stretching member 21 and the second stretching member 22, and the driving member 23 can drive the second stretching member 22 to move relative to the first stretching member 21, so that the charging assembly 1 and the butterfly valve 6 are abutted or separated. In this arrangement, the second stretching member 22 is controlled to move relative to the first stretching member 21 by the driving member 23, and the pressing force of the charging assembly 1 can be adjusted so that the charging assembly 1 is abutted against the butterfly valve 6. Compared with the prior art, the process of adjusting the bolt preload can be saved, the detection efficiency can be improved, and the offline pressure device for the butterfly valve can be easily disassembled and assembled.

[0041] Furthermore, in this embodiment, the driving member 23 is a hydraulic cylinder. Of course, in other embodiments, the driving member 23 can be a pneumatic cylinder.

[0042] Optionally, the first tension member 21 includes a first flange 211, a mounting plate 212, and a plurality of connecting rods 213. The first flange 211 can abut against the end face of the butterfly valve 6. One end of the second tension member 22 passes through the first flange 211, and the second tension member 22 is slidably connected to the first flange 211. The plurality of connecting rods 213 are evenly arranged along the circumference of the first flange 211. The ends of the connecting rods 213 are respectively connected to the first flange 211 and the mounting plate 212. The driving member 23 is arranged between the mounting plate 212 and the second tension member 22. Specifically, the mounting plate 212, the first flange 211, the butterfly valve 6, and the charging assembly 1 are coaxially arranged to balance the forces on the charging assembly 1. The diameter of the mounting plate 212 is smaller than the inner diameter of the first flange 211, and the inner diameter of the first flange 211 is the same as the inner diameter of the butterfly valve 6. The first tension member 21 is a frustum structure to avoid affecting the rotation of the valve core.

[0043] Optionally, the second tensioning member 22 includes a plurality of tie rods 221 and a fixed plate 222. The first flange 211 is provided with a plurality of through holes 2111 evenly spaced along the circumference. The plurality of through holes 2111 are provided in a one-to-one correspondence with the plurality of tie rods 221. One end of the tie rod 221 is connected to the fixed plate 222, and the other end of the tie rod 221 passes through the through hole 2111 and is connected to the pressure assembly 1. The tie rod 221 is slidably connected to the first flange 211, and the driving member 23 is provided between the mounting plate 212 and the fixed plate 222. Specifically, the fixed plate 222 is coaxially arranged with the mounting plate 212, and the plurality of tie rods 221 can balance the force on the pressure assembly 1, thereby preventing uneven force on the contact surface between the pressure assembly 1 and the butterfly valve 6.

[0044] Furthermore, the second stretching member 22 also includes a plurality of sleeves 223, and the plurality of sleeves 223 are arranged in a one-to-one correspondence with the plurality of pull rods 221. One end of the pull rod 221 passes through the fixed plate 222, and the sleeve 223 is sleeved on the outer periphery of the pull rod 221, and the end face of the sleeve 223 is against the fixed plate 222, which can prevent the pull rod 221 from separating from the fixed plate 222.

[0045] Furthermore, the second stretching member 22 also includes a plurality of fixing pins 224, which are arranged in a one-to-one correspondence with the plurality of shaft sleeves 223. The fixing pins 224 can pass through the shaft sleeve 223 and the pull rod 221 at the same time to fix the shaft sleeve 223 and the pull rod 221 to prevent the shaft sleeve 223 and the pull rod 221 from separating.

[0046] Optionally, the first tensioning member 21 further includes a plurality of mounting members 214, which are disposed on the mounting plate 212. The tensioning assembly 2 is provided with a plurality of driving members 23, which are disposed in a one-to-one correspondence with the plurality of mounting members 214, and the driving members 23 are disposed on the mounting members 214. In this arrangement, the plurality of driving members 23 act together to increase the pulling force on the charging assembly 1, thereby making the charging assembly 1 fit tightly against the butterfly valve 6 and improving the sealing performance.

[0047] Furthermore, the mounting member 214 is an open annular structure, and the driving member 23 is disposed in the mounting member 214 , which can prevent the driving member 23 from falling and facilitate the removal of the driving member 23 .

[0048] Optionally, the butterfly valve offline pressurization device includes a second flange 5, which is protruding from the outer periphery of the opening of the charging assembly 1, and the tensioning assembly 2 is connected to the second flange 5. Specifically, the second flange 5 is provided with a plurality of connecting holes 51, and the plurality of connecting holes 51 are provided in a one-to-one correspondence with the plurality of pull rods 221. One end of the pull rod 221 passes through the connecting hole 51 and is connected to the charging assembly 1.

[0049] Optionally, the inflation port 12 is a 1-inch NPT threaded hole, which is convenient for installing a quick-connect connector.

[0050] The steps for using the butterfly valve offline pressure device provided by the utility model are as follows:

[0051] Step 1: Pneumatically close the butterfly valve 6, pass the pull rod 221 through the connecting hole 51, and then through the threaded hole of the butterfly valve 6, install the first seal 3 and the second seal 4, and make the charging assembly 1 close to the butterfly valve 6;

[0052] Step 2: On the other side of the butterfly valve 6, the pull rod 221 passes through the first flange 211, and the mounting plate 212 is connected to the first flange 211 through the connecting rod 213. The driving member 23 is installed on the mounting member 214, so that the first flange 211 is close to the butterfly valve 6. The pull rod 221 then passes through the fixing plate 222 and the fixing pin 224 is inserted to connect the two, thus connecting the oil circuit.

[0053] Step 3: Supply oil to the driving member 23, hold the fixing plate 222 against the tension rod 221, so that the charging assembly 1 presses the first sealing member 3 and the second sealing member 4, and supplies air to the cavity 11 to verify the sealing performance of the butterfly valve 6;

[0054] Step 4: If the sealing is unqualified, pneumatically open the valve, remove the fixing pin 224, take out the fixing plate 222, the driving member 23 and the mounting plate 212, retract the pull rod 221 to the appropriate position, and then repair the sealing surface;

[0055] Step 5: After the repair is completed, pull out the pull rod 221, reinstall the mounting plate 212, the driving member 23 and the fixing plate 222, and perform offline pressing again referring to the above steps.

[0056] Furthermore, the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A butterfly valve offline pressure device, characterized in that: include: A charging component (1) and a stretching component (2), one end of the charging component (1) is open and can be connected to one end of a butterfly valve (6), the other end of the charging component (1) is convexly provided with a cavity (11), the opening is communicated with the cavity (11), the other end of the charging component (1) is provided with an inflation port (12) communicated with the cavity (11), the stretching component (2) is provided at the other end of the butterfly valve (6), the stretching component (2) is connected to the charging component (1), and the stretching component (2) can give the charging component (1) a force so that the charging component (1) and one end of the butterfly valve (6) are pressed against each other.

2. The butterfly valve offline pressure device according to claim 1, characterized in that: The butterfly valve offline pressurizing device further comprises a first sealing member (3), wherein the first sealing member (3) is arranged between the pressurizing assembly (1) and the butterfly valve (6).

3. The butterfly valve offline pressure device according to claim 2, characterized in that: The butterfly valve offline pressing device further comprises a second sealing member (4), which is arranged between the pressurizing assembly (1) and the butterfly valve (6), and the diameter of the second sealing member (4) is smaller than that of the first sealing member (3).

4. The butterfly valve offline pressure device according to claim 3, characterized in that: The first sealing member (3) and the second sealing member (4) are both rubber pads.

5. The butterfly valve offline pressure device according to claim 1, characterized in that: The stretching assembly (2) includes a first stretching member (21), a second stretching member (22) and a driving member (23), wherein the first stretching member (21) is connected to the other end of the butterfly valve (6), one end of the second stretching member (22) passes through the first stretching member (21) and is connected to the charging assembly (1), and the second stretching member (22) is slidably connected to the first stretching member (21), and the driving member (23) is arranged between the first stretching member (21) and the second stretching member (22), and the driving member (23) can drive the second stretching member (22) to move relative to the first stretching member (21) so that the charging assembly (1) and the butterfly valve (6) are opposed to or separated.

6. The butterfly valve offline pressing device according to claim 5, characterized in that: The driving member (23) is a hydraulic cylinder.

7. The butterfly valve offline pressing device according to claim 5, characterized in that: The first stretching member (21) includes a first flange (211), a mounting plate (212) and a plurality of connecting rods (213). The first flange (211) can abut against the end face of the butterfly valve (6). One end of the second stretching member (22) passes through the first flange (211). The second stretching member (22) is slidably connected to the first flange (211). The plurality of connecting rods (213) are evenly arranged along the circumference of the first flange (211). The two ends of the connecting rods (213) are respectively connected to the first flange (211) and the mounting plate (212). The driving member (23) is arranged between the mounting plate (212) and the second stretching member (22).

8. The butterfly valve offline pressing device according to claim 7, characterized in that: The second stretching member (22) includes a plurality of pull rods (221) and a fixed plate (222), the first flange (211) is provided with a plurality of through holes (2111) evenly spaced along the circumference, the plurality of through holes (2111) and the plurality of pull rods (221) are provided in a one-to-one correspondence, one end of the pull rod (221) is connected to the fixed plate (222), the other end of the pull rod (221) passes through the through hole (2111) and is connected to the charging assembly (1), and the pull rod (221) is slidably connected to the first flange (211), and the driving member (23) is provided between the mounting plate (212) and the fixed plate (222).

9. The butterfly valve offline pressing device according to claim 7, characterized in that: The first stretching member (21) further comprises a plurality of mounting members (214), the plurality of mounting members (214) being arranged on the mounting plate (212), the stretching assembly (2) being provided with a plurality of driving members (23), the plurality of driving members (23) being arranged in a one-to-one correspondence with the plurality of mounting members (214), and the driving members (23) being arranged on the mounting members (214).

10. The butterfly valve offline pressing device according to any one of claims 1 to 8, characterized in that: The butterfly valve offline pressing device comprises a second flange (5), the second flange (5) is protruding from the outer periphery of the opening of the pressure charging component (1), and the stretching component (2) is connected to the second flange (5).

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