Membrane replacement tool and membrane replacement method

Abstract

The diaphragm replacement tool and the diaphragm replacement method are used for a pneumatic diaphragm actuator, the actuator comprises a diaphragm box, a diaphragm pressing disc and a spring are arranged in the diaphragm box, the spring is arranged below the diaphragm pressing disc and abuts against the diaphragm pressing disc, the diaphragm replacement tool comprises a main body and an extension rod, and the extension rod is arranged on the main body. The extension rod is fixed to the body and extends in the radial direction of the body, the extension rod is fixed to a diaphragm box of the actuator, and the body abuts against the upper portion of the diaphragm pressing disc so as to be used for compressing the spring. According to the technical scheme, the diaphragm replacement tool can reduce the replacement difficulty of the diaphragm.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pneumatic diaphragm actuators, and in particular, to a diaphragm replacement tool and a diaphragm replacement method. Background Art

[0002] During long-term use, pneumatic diaphragm actuators are prone to diaphragm rupture and need to be replaced. When the diaphragm ruptures, the compressed air on the diaphragm actuator will leak into the spring chamber below, causing an imbalance in the upper and lower forces of the diaphragm, which in turn causes abnormal opening of the valve. Therefore, technical support is required to replace the diaphragm.

[0003] In the related art, due to the rupture of the diaphragm, the force exerted by the diaphragm on one side of the diaphragm pressure plate is reduced or even disappears, and the force applied by the spring on the other side of the diaphragm pressure plate pushes the diaphragm pressure plate to abut against the cover plate, making the cover plate difficult to remove, and further making it difficult to replace the diaphragm. Summary of the invention

[0004] The purpose of the present disclosure is to provide a diaphragm replacement tool and a diaphragm replacement method, wherein the diaphragm replacement tool can reduce the difficulty of replacing the diaphragm.

[0005] In order to achieve the above-mentioned objectives, the present disclosure provides a diaphragm replacement tool for a pneumatic diaphragm actuator, the actuator comprising a diaphragm box, a diaphragm pressure plate and a cover plate being arranged in the diaphragm box, a diaphragm being clamped between the diaphragm pressure plate and the cover plate, the diaphragm being fixedly connected to the diaphragm box, the diaphragm replacement tool comprising a main body and an extension rod, the extension rod being fixed to the main body and extending radially along the main body, the extension rod being fixed to the diaphragm box of the actuator, so as to clamp the diaphragm between the diaphragm pressure plate and the main body.

[0006] Optionally, the diaphragm box includes a second sub-box, the second sub-box is provided with a mounting hole, the extension rod is provided with a matching hole corresponding to the mounting hole, and the extension rod is fixedly connected to the second sub-box via a fastener.

[0007] Optionally, there are multiple mounting holes and multiple extension rods, the multiple mounting holes are arranged at intervals along the circumference of the second sub-box, and the number of the extension rods corresponds to the number of the mounting holes.

[0008] Optionally, the main body is provided with an avoidance channel, and the projection of the avoidance channel in the vertical direction covers the projection of the cover plate in the vertical direction.

[0009] Optionally, a projection of the diaphragm pressure plate in the vertical direction covers a projection of the avoidance channel in the vertical direction.

[0010] Optionally, the fastener is configured as a bolt.

[0011] On the basis of the above technical solution, the present disclosure further provides a diaphragm replacement method, which is applicable to the diaphragm replacement tool, and the steps of the replacement method include: Dismantling the first sub-box of the diaphragm box; Connecting the diaphragm replacement tool to the second sub-box; Adjusting the position of the diaphragm replacement tool to compress the spring; Remove the cover; Slowly remove the diaphragm replacement tool; Separate the diaphragm to be removed from the diaphragm pressure plate.

[0012] Optionally, the “slowly removing the diaphragm replacement tool” includes: Connecting the diaphragm replacement tool to the second sub-box via bolts; Slowly rotate the bolt until the spring is fully released; Remove the diaphragm replacement tool.

[0013] Optionally, the “removing the first sub-box of the diaphragm box” includes: Disconnect the air source of the pneumatic actuator and remove the corresponding pipelines and solenoid valves; Loosen the bolts on the joint surface of the diaphragm box and remove the first sub-box.

[0014] Optionally, the diaphragm replacement method further comprises: Placing the diaphragm to be installed on the diaphragm pressing plate, and installing the diaphragm pressing plate; Rotate the bolt so that the diaphragm to be installed is clamped between the diaphragm replacement tool and the diaphragm pressure plate; Rotate the bolt to move the diaphragm replacement tool and the diaphragm pressure plate downward to the position where the joint surface of the first sub-box and the second sub-box is located; Connecting the membrane to be installed to the second sub-box; Installing the cover plate; Removing the diaphragm replacement tool; Install the first sub-box.

[0015] Through the above technical scheme, in the diaphragm replacement tool provided by the present invention, the tool includes a main body and an extension rod, wherein the extension rod is used to connect with the diaphragm box, and the main body is used to abut against the diaphragm pressure plate to compress the spring. In this way, when the diaphragm replacement tool provided by the present invention is used in the field of pneumatic diaphragm actuators, the first sub-box of the diaphragm box is removed, the tool is connected to the second sub-box, and the main body abuts against the diaphragm pressure plate. By adjusting the position of the main body, the position of the diaphragm pressure plate can be adjusted, thereby making the diaphragm pressure plate away from the cover plate to facilitate the disassembly of the cover plate, thereby finally achieving the purpose of facilitating diaphragm replacement.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a structural schematic diagram of a diaphragm replacement tool provided in an embodiment of the present disclosure; Figure 2 is a structural schematic diagram of a pneumatic film actuator provided by an embodiment of the present disclosure; Figure 3 is another structural schematic diagram of the pneumatic registration actuator provided by the embodiment of the present disclosure; Figure 4 It is a structural schematic diagram of the diaphragm replacement tool provided in the embodiment of the present disclosure when it is applied to a pneumatic diaphragm actuator; Figure 5 It is a flow chart of the diaphragm replacement method provided in the embodiment of the present disclosure.

[0018] Description of Reference Numerals 1-main body; 11-avoidance channel; 2-extension rod; 21-matching hole; 3-diaphragm box; 31-first sub-box; 32-second sub-box; 321-installation hole; 33-joining surface; 4-diaphragm pressure plate; 5-cover plate; 6-diaphragm; 7-spring; 8-bolt. DETAILED DESCRIPTION

[0019] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0020] In the present disclosure, unless otherwise stated, directional words such as "upper and lower" generally refer to the relative "upper and lower" in the direction of gravity when the corresponding parts are in use, and "inside and outside" generally refer to the "inside and outside" relative to the corresponding parts' own contours. The terms "first", "second", etc. used are to distinguish one element from another and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0021] In the related art, the diaphragm in the pneumatic diaphragm actuator is usually a rubber part with great elasticity and strong airtightness, so that when gas enters the diaphragm box, a pressure difference is formed on the upper and lower sides of the diaphragm, pushing the valve stem to move and the diaphragm to deform. Therefore, during long-term use, the diaphragm is prone to cracking and damage due to repeated deformation, which in turn causes the pneumatic diaphragm actuator to fail and affect the working state. For the normally open pneumatic diaphragm actuator, the diaphragm is connected to the joint surface of the first sub-box and the second sub-box of the diaphragm box, and the diaphragm itself is deformed. Under the action of the spring and the diaphragm pressure plate, the diaphragm is in the upper half of the diaphragm box as a whole. At this time, the diaphragm is in a stretched state. After the gas is introduced, the air pressure in the upper half of the diaphragm box increases to push the diaphragm to the position of the joint surface between the first sub-box and the second sub-box of the diaphragm box. At this time, the diaphragm is in a relatively relaxed state, and the diaphragm pressure plate is also pushed to the middle position of the diaphragm box. The diaphragm pressure plate drives the valve stem downward to close the valve, and the spring is compressed. After the closing gas is introduced, the pressure difference between the upper and lower sides of the diaphragm decreases, and the spring extends to provide thrust to push the diaphragm pressure plate and the diaphragm to their original position, that is, the upper half of the diaphragm box, and the diaphragm returns to the stretched state.

[0022] When replacing the diaphragm of the above-mentioned pneumatic diaphragm actuator, it is necessary to remove the first sub-box of the diaphragm box where the diaphragm is located, and then remove the cover plate to detach the diaphragm from the diaphragm pressure plate. In the case of a damaged diaphragm, the diaphragm cannot provide a downward thrust to the diaphragm pressure plate, and the spring under the diaphragm pressure plate is usually still in a compressed state to overcome the gravity of the diaphragm pressure plate and the valve stem to keep the valve stem in a high position. In this way, the diaphragm pressure plate abuts against the cover plate to clamp the diaphragm between the two, resulting in the need for the cover plate bolts to overcome the elastic force of the spring when removing it, which in turn makes it difficult to remove the cover plate and replace the diaphragm. Accordingly, when installing a new diaphragm, it is necessary to overcome the thrust of the spring to stretch the diaphragm to the joint surface of the diaphragm box and fix it to the second sub-box, which also makes it difficult to install the diaphragm.

[0023] In order to solve the above technical problems, according to the specific embodiments provided by the present disclosure, reference is made to Figure 1 As shown in the figure, a diaphragm replacement tool is provided for a pneumatic diaphragm actuator, the actuator includes a diaphragm box 3, a diaphragm pressure plate 4 and a spring 7 are arranged in the diaphragm box 3, the spring 7 is arranged below the diaphragm pressure plate 4 and abuts against the diaphragm pressure plate 4, the diaphragm replacement tool includes a main body 1 and an extension rod 2, the extension rod 2 is fixed to the main body 1 and extends radially along the main body 1, the extension rod 2 is fixed to the diaphragm box 3 of the actuator, and the main body 1 abuts against the top of the diaphragm pressure plate 4 for compressing the spring 7.

[0024] Through the above technical scheme, in the diaphragm replacement tool provided by the present invention, the tool includes a main body 1 and an extension rod 2, wherein the extension rod 2 is used to connect with the diaphragm box 3, and the main body 1 is used to abut against the diaphragm pressure plate 4 to compress the spring 7. In this way, when the diaphragm replacement tool provided by the present invention is used in the field of pneumatic diaphragm actuators, by removing the first sub-box 31 of the diaphragm box 3, the tool is connected to the second sub-box 32, and the main body 1 abuts against the diaphragm pressure plate 4. By adjusting the position of the main body 1, the position of the diaphragm pressure plate 4 can be adjusted, thereby making the diaphragm pressure plate 4 away from the cover plate 5, so as to facilitate the disassembly of the cover plate 5, and finally achieve the purpose of facilitating the replacement of the diaphragm 6.

[0025] In the diaphragm replacement tool provided in the present disclosure, the tool can be fixed to the diaphragm box 3 in any suitable manner, and the present disclosure does not impose any specific restrictions on this. As an exemplary embodiment, refer to Figure 1 and Figure 3 As shown in , the diaphragm box 3 includes a second sub-box 32, the second sub-box 32 may be provided with a mounting hole 321, the extension rod 2 may be provided with a matching hole 21 corresponding to the mounting hole 321, and the extension rod 2 is fixedly connected to the second sub-box 32 by a fastener. Among them, the mounting hole 321 may be a connection hole for the second sub-box 32 to be connected with the first sub-box 31, that is, the second sub-box 32 may not be provided with a mounting hole 321, but after the first sub-box 31 is removed, the diaphragm replacement tool replaces the first sub-box 31 and is connected to the second sub-box 32 to achieve abutment with the diaphragm pressure plate 4.

[0026] On the basis of the above implementation, in order to improve the reliability of the connection between the diaphragm replacement tool and the diaphragm box 3, as an exemplary embodiment, reference Figure 1 As shown in , the number of mounting holes 321 can be multiple, the number of extension rods 2 can also be multiple, and the multiple mounting holes 321 can be arranged at intervals along the circumference of the second sub-box 32, and the number of extension rods 2 corresponds to the number of mounting holes 321. In other words, each extension rod 2 can be connected to the mounting hole 321 at the corresponding position, wherein the multiple extension rods 2 can be evenly spaced along the circumference of the main body 1, so that the main body 1 can be in a uniform force state when it abuts against the diaphragm pressure plate 4. After the diaphragm pressure plate 4 is controlled to leave the cover plate 5, the cover plate 5 is removed, and then the multiple fasteners are gradually loosened until the spring 7 is completely released, and then the diaphragm 6 tooling is removed, and finally the diaphragm 6 is removed from the diaphragm pressure plate 4.

[0027] In the present disclosure, the number of extension rods 2 is constructed to be 4, and the 4 extension rods 2 are evenly spaced along the circumference of the main body 1, that is, two adjacent extension rods 2 extend perpendicularly to each other. In some other embodiments, the number of extension rods 2 can also be 3, 5, etc., which can all achieve reliable connection of the diaphragm replacement tooling on the diaphragm box 3. The present disclosure does not make any specific restrictions on this.

[0028] In the diaphragm replacement tool provided in the present disclosure, as an exemplary embodiment, reference is made to Figure 1 and Figure 4 As shown in , the main body 1 may be provided with an escape channel 11, and the escape channel 11 may cover the projection of the cover plate 5 in the vertical direction. In this way, the diaphragm 6 tooling can pass over the cover plate 5 and abut against the diaphragm pressure plate 4 without removing the cover plate 5, so as to remove the thrust applied by the diaphragm pressure plate 4 to the cover plate 5 under the push of the spring 7 when the diaphragm 6 is damaged, thereby facilitating the removal of the cover plate 5.

[0029] As an exemplary embodiment, reference is made to Figure 4 As shown in , the projection of the diaphragm pressure plate 4 in the vertical direction can cover the projection of the avoidance channel 11 in the vertical direction. In other words, the diaphragm replacement tool can pass over the cover plate 5 through the avoidance channel 11, but cannot pass over the diaphragm pressure plate 4, so as to ensure that the diaphragm replacement tool abuts against the diaphragm pressure plate 4. In addition, in some other embodiments, the avoidance channel 11 can be designed in any suitable manner according to the different shapes of the cover plate 5 and the diaphragm pressure plate 4, and the present disclosure does not make any specific restrictions on this.

[0030] In the diaphragm replacement tool provided by the present disclosure, the fastener can be constructed in any suitable form to facilitate the movement of the diaphragm replacement tool position, and the present disclosure does not impose any specific restrictions on this. As an exemplary embodiment, refer to Figure 4 As shown in the figure, the fastener can be constructed as a bolt 8, and the bolt 8 can have a certain length to ensure that when the elastic force of the spring 7 is fully released, the diaphragm replacement tool can still be connected to the diaphragm box 3 through the bolt 8, so as to avoid the diaphragm pressure plate 4 or the diaphragm 6 from bursting out due to the spring 7 still having a certain elastic force after the diaphragm replacement tool is removed.

[0031] Based on the above technical solution, Figures 3 to 5 As shown in , the present disclosure also provides a diaphragm 6 replacement method, which is suitable for a diaphragm replacement tool, and the steps of the replacement method include: removing the first sub-box 31 of the diaphragm box 3, connecting the diaphragm replacement tool with the second sub-box 32, adjusting the position of the diaphragm replacement tool to compress the spring 7, removing the cover plate 5, slowly removing the diaphragm replacement tool, and separating the diaphragm 6 to be removed from the diaphragm pressure plate 4. Specifically, refer to Figures 2 to 4 As shown in FIG. 1 , when the diaphragm 6 of the pneumatic diaphragm actuator is damaged and needs to be replaced, first remove the first sub-box 31 of the diaphragm box 3 from the second sub-box 32 (refer to FIG. 1 ). Figure 2 and Figure 3 ), and then the diaphragm replacement tool is connected to the second sub-box 32 through bolts 8 (refer to Figure 4The diaphragm replacement tooling is shown in FIG. 5 , because the diaphragm replacement tooling is provided with an avoidance channel 11 for the cover plate 5 to pass through, the diaphragm replacement tooling is abutted against the diaphragm 6 by screwing the bolt 8, and the bolt 8 is continued to be screwed, so that the diaphragm replacement tooling replaces the cover plate 5 to clamp the diaphragm 6 between the diaphragm replacement tooling and the diaphragm pressure plate 4. At this time, the thrust of the spring 7 acts on the diaphragm replacement tooling through the diaphragm pressure plate 4, so that it is easy to disassemble the cover plate 5. After the cover plate 5 is disassembled, the bolt 8 is slowly screwed multiple times to gradually adjust the position of the diaphragm replacement tooling to move up, so as to gradually remove the thrust of the spring 7 until the diaphragm replacement tooling is removed after the spring 7 is completely released. Therefore, not only can the difficulty in disassembling the cover plate 5 due to the thrust of the spring 7 during the removal of the cover plate 5, or the failure of the matching thread of the cover plate 5, but also the problem of the diaphragm 6 or the diaphragm pressure plate 4 collapsing under the action of the spring 7 can be avoided in the process of slowly removing the thrust of the spring 7, thereby reducing the safety hazard of replacing the diaphragm 6.

[0032] Among them, "slowly removing the diaphragm replacement tool" can also include connecting the diaphragm replacement tool with the second sub-box 32 through the bolt 8, slowly rotating the bolt 8 until the spring 7 is completely released, and removing the diaphragm replacement tool. The bolt 8 is preferably of a certain length to ensure the connection between the diaphragm replacement tool and the second sub-box 32 before the thrust of the spring 7 is completely released, thereby achieving the purpose of preventing the spring 7 from pushing the diaphragm pressure plate 4 or the diaphragm 6 to collapse.

[0033] Among them, “removing the first sub-box 31 of the diaphragm box 3” may also include disconnecting the air source of the pneumatic actuator, removing the corresponding pipeline and solenoid valve, loosening the bolts 8 of the joint surface 33 of the diaphragm box 3, and removing the first sub-box 31. That is to say, before replacing the diaphragm 6, it is necessary to close the pneumatic film actuator and release the connection relationship between the corresponding pipeline and solenoid valve connected to the pneumatic film actuator and the start film actuator, so as to facilitate the replacement of the diaphragm 6.

[0034] In the diaphragm 6 replacement method provided in the present disclosure, the steps of the diaphragm 6 replacement method may also include placing the diaphragm 6 to be installed on the diaphragm pressure plate 4, installing the diaphragm pressure plate 4, rotating the bolt 8 so that the diaphragm 6 to be installed is clamped between the diaphragm replacement tool and the diaphragm pressure plate 4, rotating the bolt 8 so that the diaphragm replacement tool and the diaphragm pressure plate 4 are moved down to the position where the joint surface 33 of the first sub-box 31 and the second sub-box 32 is located, the diaphragm 6 to be installed is fixedly connected with the second sub-box 32, the cover plate 5 is installed, the diaphragm replacement tool is removed, and the first sub-box 31 is installed. In this way, the difficulty of the staff in installing the diaphragm 6 can be effectively reduced. Specifically, when installing a new diaphragm 6, in order to ensure the air tightness of the upper and lower sides of the diaphragm 6, the diaphragm 6 usually needs to be stretched to a certain extent before it can be fixed at the joint surface 33 of the diaphragm box 3. Because a spring 7 is provided under the diaphragm pressure plate 4, it is also necessary to overcome a certain thrust from the spring 7, resulting in time-consuming and labor-intensive installation of the diaphragm 6. In the present disclosure, when a new diaphragm 6 (i.e., the diaphragm 6 to be installed) needs to be installed, the diaphragm 6 only needs to be placed on the diaphragm pressure plate 4, the diaphragm pressure plate 4 and the cover plate 5 are installed, and then the diaphragm replacement tooling is installed on the second sub-box 32, and the bolt 8 is screwed to adjust the position of the diaphragm replacement tooling, and then the position of the diaphragm 6 clamped between the diaphragm replacement tooling and the diaphragm pressure plate 4 is adjusted to a position close to the joint surface 33 of the diaphragm box 3, the diaphragm 6 is stretched and connected to the second sub-box 32, the diaphragm replacement tooling is removed, and the first sub-box 31 and the second sub-box 32 are fixed to realize the replacement of the new diaphragm 6, thereby effectively reducing the difficulty of installing the diaphragm 6 to be installed.

[0035] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0036] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0037] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A diaphragm replacement tool, characterized in that: For a pneumatic diaphragm actuator, the actuator comprises a diaphragm box, a diaphragm pressure plate and a spring are arranged in the diaphragm box, the spring is arranged below the diaphragm pressure plate and abuts against the diaphragm pressure plate, The diaphragm replacement tool includes a main body and an extension rod, wherein the extension rod is fixed to the main body and extends radially of the main body, the extension rod is fixed to the diaphragm box of the pneumatic diaphragm actuator, and the main body abuts against the top of the diaphragm pressure plate to compress the spring.

2. The diaphragm replacement tool according to claim 1, characterized in that: The diaphragm box includes a second sub-box, the second sub-box is provided with a mounting hole, the extension rod is provided with a matching hole corresponding to the mounting hole, and the extension rod is fixedly connected to the second sub-box through a fastener.

3. The diaphragm replacement tool according to claim 2, characterized in that: There are a plurality of mounting holes and a plurality of extension rods. The plurality of mounting holes are arranged at intervals along the circumference of the second sub-box, and the number of the extension rods corresponds to the number of the mounting holes.

4. The diaphragm replacement tool according to claim 2, characterized in that: The main body is provided with an avoidance channel, and the projection of the avoidance channel in the vertical direction covers the projection of the cover plate of the pneumatic diaphragm actuator in the vertical direction.

5. The diaphragm replacement tool according to claim 4, characterized in that: The projection of the diaphragm pressure plate in the vertical direction covers the projection of the avoidance channel in the vertical direction.

6. The diaphragm replacement tool according to claim 2, characterized in that: The fastener is configured as a bolt.

7. A diaphragm replacement method, the diaphragm replacement method is applicable to the diaphragm replacement tool, characterized in that: The steps of the replacement method include: Dismantling the first sub-box of the diaphragm box; Connecting the diaphragm replacement tool to the second sub-box in an adjustable manner; Adjusting the position of the diaphragm replacement tool to compress the spring; Remove the cover; Slowly remove the diaphragm replacement tool; Separate the diaphragm to be removed from the diaphragm pressure plate.

8. The diaphragm replacement method according to claim 7, characterized in that: The "slowly removing the diaphragm replacement tool" includes: Connecting the diaphragm replacement tool to the second sub-box via bolts; Slowly rotate the bolt until the spring is fully released; Remove the diaphragm replacement tool.

9. The diaphragm replacement method according to claim 7, characterized in that: The "first sub-box of the diaphragm box removed" comprises: Disconnect the air source of the pneumatic actuator and remove the corresponding pipelines and solenoid valves; Loosen the bolts on the joint surface of the diaphragm box and remove the first sub-box.

10. The diaphragm replacement method according to claim 7, characterized in that: The steps of the diaphragm replacement method also include: Placing the diaphragm to be installed on the diaphragm pressing plate, and installing the diaphragm pressing plate; Rotate the bolt so that the diaphragm to be installed is clamped between the diaphragm replacement tool and the diaphragm pressure plate; Rotate the bolt to move the diaphragm replacement tool and the diaphragm pressure plate downward to the position where the joint surface of the first sub-box and the second sub-box is located; Connecting the membrane to be installed to the second sub-box; Installing the cover plate; Removing the diaphragm replacement tool; Install the first sub-box.

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