Packing taking-out device

Abstract

According to the packing taking-out device, through a through hole formed in a mounting base, a valve rod can penetrate through the through hole, so that the periphery of a packing box can be sleeved with the mounting base, and the position, relative to the packing box, of a connecting piece is positioned in the radial direction; the connecting piece can move relative to the mounting base in the axial direction of the connecting piece, and due to the fact that the packing is located in the packing box and is sealed on the periphery of the valve rod, the connecting piece can move into the packing box in the axial direction of the connecting piece and is fixedly connected with the packing. Under the condition that the connecting piece is located in the packing box, gaps are formed between the connecting piece and the packing box and between the connecting piece and the valve rod, and therefore the connecting piece cannot make contact with the valve rod and the packing box in the process that the connecting piece is fixedly connected with the packing. And the connecting piece can be separated from the packing box along with the mounting seat, and after the connecting piece is fixedly connected with the packing, the mounting seat and the connecting piece are synchronously lifted upwards, so that the packing is taken out from the connecting piece, and the damage to the valve rod and the packing box caused by taking out the packing is reduced.

Description

Technical Field

[0001] This application relates to the field of valve fittings technology, and more specifically, to a packing removal device. Background Technology

[0002] In the valve body structure of pneumatic valves, the valve stem is usually sealed by packing. The packing is placed inside the packing gland and seals the valve stem and valve body. After repeated opening and closing operations, pneumatic valves are prone to external leakage of the packing. When the external leakage of the packing cannot be eliminated by increasing the packing tightening torque, a new packing must be replaced to ensure the sealing of the valve stem and valve body.

[0003] Currently, packing is usually retrieved using a packing hook. However, due to the small space inside the packing gland, the packing hook can easily scratch the valve stem and packing gland during the retrieval process.

[0004] In addition, packing glands usually contain multiple packing glands, and the packing hooks need to pick up the packing glands one by one, resulting in low efficiency in packing gland removal.

[0005] In summary, how to reduce the damage to the valve stem and packing gland caused by removing the packing is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this application is to provide a packing removal device to reduce damage to the valve stem and packing gland caused by removing the packing.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A packing removal device includes: a mounting base and a connector; wherein the mounting base is used to fit around the outer periphery of the packing gland, and the mounting base and the packing gland are detachably and fixedly connected; the mounting base has a through hole for a valve stem to pass through; the connector is movably disposed on the mounting base along its axial direction, such that the connector is located inside the packing gland and fixedly connected to the packing, and the connector can detach from the packing gland along with the mounting base;

[0009] When the connector is located inside the packing gland, there is a gap between the connector, the packing gland, and the valve stem.

[0010] In some embodiments, there are at least two connectors, and the at least two connectors are distributed sequentially along the circumference of the mounting base;

[0011] And / or, the connector can be fixedly connected to all the packings within the packing box.

[0012] In some embodiments, the connector is provided with a tip for insertion into the packing, the tip tapering along the axial direction of the connector.

[0013] In some embodiments, the connector is a long screw that is threaded into the mounting base and is used for a fixed connection with the packing.

[0014] In some embodiments, a fastener is also included for securing the mounting base and the valve body together.

[0015] In some embodiments, the mounting base has a mounting hole for mounting the fastener, the mounting hole being arranged radially along the mounting base, the fastener being used to abut against the circumferential sidewall of the valve body through the mounting hole, and the fastener being movable relative to the mounting base along the mounting hole;

[0016] And / or, the fastener is a first screw, which is threaded into the mounting base.

[0017] In some embodiments, there are at least two fasteners, which are distributed sequentially along the circumference of the mounting base, and adjacent fasteners are at an angle to each other.

[0018] In some embodiments, a lifting member for connection with the mounting base is also included, the lifting member enabling the mounting base and the connector to which the packing is fixedly connected to move synchronously along the axial direction of the valve stem away from the packing gland.

[0019] In some embodiments, the lifting member is a second screw, which is threadedly engaged with the mounting seat. The axis of the second screw is parallel to the axis of the valve stem. The second screw is used to abut against the top surface of the valve body, and the end of the second screw that abuts against the top surface is a smooth surface.

[0020] In some embodiments, there are at least two second screws, and at least two second screws are distributed sequentially along the circumference of the mounting base.

[0021] [P]The packing removal device provided in this application allows the valve stem to pass through a through hole in the mounting base, enabling the mounting base to be fitted over the outer periphery of the packing gland, thereby radially positioning the connector relative to the packing gland. The connector can move axially relative to the mounting base. Since the packing gland is located inside the packing gland and sealed around the valve stem, the connector can move axially into the packing gland and be fixedly connected to it. When the connector is inside the packing gland, there are gaps between the connector, the packing gland, and the valve stem, ensuring that the connector does not contact the valve stem or the packing gland during the fixing process. Furthermore, the connector can detach from the packing gland along with the mounting base. After the connector is fixedly connected to the packing gland, the mounting base and the connector are lifted upwards simultaneously, allowing the connector to remove the packing gland, thus reducing damage to the valve stem and the packing gland during removal.[ / P] Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the valve body structure of a pneumatic valve.

[0024] Figure 2 This is a schematic diagram of the packing removal device provided in an embodiment of this application;

[0025] Figure 3 for Figure 2 A bottom view of the packing removal device shown;

[0026] Figure 4 This is a top view of the packing removal device provided in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram illustrating the cooperation between the fastener and the mounting base provided in the embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100-Valve body, 101-Side wall, 102-Top face, 110-Valve stem, 120-Packing gland;

[0030] 210-Mounting base, 211-Through hole, 220-Connector, 221-Tip, 230-Fixed part, 240-Lifting part;

[0031] 300-Panting. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0034] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0035] In this application, "multiple" refers to two or more embodiments. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance, nor as indicating or implying order.

[0036] like Figure 1As shown, a valve stem 110 is provided inside the valve body 100. A packing 300 is sleeved on the valve stem 110 and seals the valve stem 110 and the valve body 100. The packing 300 is located inside the packing gland 120. Currently, the packing 300 is usually removed by a packing hook. However, due to the small space inside the packing gland 120, removing the packing 300 can easily damage the valve stem 110 and the packing gland 120.

[0037] This application provides a packing removal device to reduce damage to the valve stem and packing gland caused by removing the packing.

[0038] like Figures 2-5 As shown in the embodiment of this application, the packing removal device includes a mounting base 210 and a connector 220. The mounting base 210 is used to fit around the outer periphery of the packing gland 120, and the mounting base 210 and the packing gland 120 are detachably and fixedly connected. The mounting base 210 has a through hole 211 through which the valve stem 110 can pass. Thus, when it is necessary to remove the packing 300, the valve stem 110 passes through the through hole 211 and the mounting base 210 is fixed on the packing gland 120 and the valve body 100, so as to position the connector 220 relative to the packing gland 120 in the radial direction, so that the subsequent connector 220 can enter the interior of the packing gland 120 along the positioning direction.

[0039] The connector 220 is axially movably mounted on the mounting base 210, allowing it to move axially into the packing gland 120 and be fixedly connected to the packing gland 300. When the connector 220 is inside the packing gland 120, there are gaps between the connector 220, the packing gland 120, and the valve stem 110. This ensures that the connector 220 will not contact the valve stem 110 or the packing gland 120 during the fixed connection process with the packing gland 300. Furthermore, the connector 220 can... As the mounting base 210 disengages from the packing gland 120, after the connector 220 is fixedly connected to the packing gland 300, by lifting the mounting base 210 upwards, the connector 220 and the packing gland 300 fixedly connected to the connector 220 can be lifted upwards simultaneously to remove the packing gland 300. During the removal of the packing gland 300, the connector 220 will not contact the valve stem 110 and the packing gland 120, reducing the damage to the valve stem 110 and the packing gland 120 caused by the removal of the packing gland 300.

[0040] Because the packing 300 is tightly fitted with the valve stem 110 and the packing gland 120, in order to ensure that the packing 300 is subjected to balanced force during the removal process, there are at least two connecting pieces 220, and at least two connecting pieces 220 are distributed sequentially along the circumference of the mounting base 210. In this way, at least two connecting pieces 220 can be fixedly connected to at least two parts along the circumference of the packing 300, so that the packing 300 is subjected to force at at least two positions in the circumference, thereby improving the removal efficiency of the packing 300.

[0041] In some embodiments, such as Figures 2-3 As shown, there are four connectors 220, which are distributed sequentially along the circumference of the mounting base 210, and the included angle between adjacent connectors 220 is 90°. This allows the four connectors 220 to fix the packing 300 to four positions on the circumference, so that the packing 300 is subjected to balanced force and the removal efficiency of the packing 300 is improved.

[0042] like Figure 3 As shown, the connector 220 is provided with a tip 221, and the tip 221 gradually tapers along the axial direction of the connector 220. The connector 220 is inserted into the packing 300 through the tip 221 to achieve a fixed connection between the connector 220 and the packing 300.

[0043] Since the packing gland 120 contains multiple packing glands 300, and these packing glands 300 are distributed sequentially along the axial direction of the packing gland 120, in order to further improve the removal efficiency of the packing glands 300, the connector 220 has a certain length so that the connector 220 can be fixedly connected to all the packing glands 300 in the packing gland 120. In this way, the connector 220 can remove all the packing glands 300 in the packing gland 120 simultaneously, further improving the removal efficiency of the packing glands 300.

[0044] In some embodiments, such as Figure 3 As shown, the connector 220 is a long screw, which is threaded into the mounting base 210. The tip of the long screw is used to insert into the packing 300. By rotating the long screw, the long screw can enter the interior of the packing box 120 along its axial direction and be fixedly connected to all the packing 300. During the upward movement of the mounting base 210, the threaded connection between the long screw and the mounting base 210 has a self-locking property, which allows the mounting base 210 to drive the long screw to move upward synchronously to remove the packing 300.

[0045] It should be noted that the friction between the connector 220 and the packing 300 is greater than the friction between the packing 300 and the packing gland 120 and the valve stem 110. Therefore, the connector 220 can drive the packing 300 to move upward so as to remove the packing 300.

[0046] Since the packing 300 has a relatively dense braided packing inside, the process of fixing the connector 220 to the packing 300 requires overcoming a large frictional force. In order to ensure the stability of the connection process between the connector 220 and the packing 300, the packing removal device provided in this application embodiment also includes a fixing member 230 for fixing the mounting base 210 and the valve body 100, so that the mounting base 210 can be fixed to the valve body 100, thus ensuring the stability of the connection process between the connector 220 and the packing 300.

[0047] Mounting base 210 has mounting holes for mounting fastener 230. The mounting holes are arranged radially along the mounting base 210, and the fastener 230 is used to abut against the circumferential side wall 101 of the valve body 100 through the mounting holes. The fastener 230 can move relative to the mounting base 210 along the mounting holes. In this way, when it is necessary to fix the mounting base 210, moving the fastener 230 will cause it to abut against the side wall 101 of the valve body 100, so that the position of the mounting base 210 and the valve body 100 is relatively fixed, ensuring the stability of the connection process between the connector 220 and the packing 300.

[0048] In some embodiments, such as Figures 4-5 As shown, the fixing member 230 is the first screw, and the mounting hole is a threaded hole. The fixing member 230 is threadedly engaged with the mounting seat 210 through the threaded hole. In this way, after the mounting seat 210 is sleeved on the outer periphery of the packing gland 120, the first screw is rotated to move relative to the mounting seat 210 along its axial direction until the first screw abuts against the circumferential side wall 101 of the valve body 100, thereby achieving the fixation between the mounting seat 210 and the valve body 100.

[0049] To improve the stability of fixing the mounting base 210 to the valve body 100, there are at least two fixing members 230. The at least two fixing members 230 are distributed sequentially along the circumference of the mounting base 210, and there is an included angle between adjacent fixing members 230. In this way, the at least two fixing members 230 can abut against the side wall 101 of the valve body 100, and fix the mounting base 210 and the valve body 100 from at least two directions, thereby improving the stability of fixing the mounting base 210 and the valve body 100.

[0050] In some embodiments, such as Figures 4-5 As shown, there are four fasteners 230, which are distributed sequentially along the circumference of the mounting base 210, and the included angle between adjacent fasteners 230 is 90°. In this way, the fasteners 230 can fix the mounting base 210 and the valve body 100 in four directions, which further improves the stability of the fixing between the mounting base 210 and the valve body 100.

[0051] Since the lifting process of the mounting base 210 needs to overcome a large frictional force, the packing removal device provided in this application embodiment also includes a lifting member 240 for connecting with the mounting base 210. The lifting member 240 enables the mounting base 210 and the connecting member 220, which is fixedly connected to the packing 300, to move synchronously along the axial direction of the valve stem 110 away from the packing box 120, so as to realize that the packing 300 is detached from the packing box 120.

[0052] like Figures 1-2 As shown, the lifting member 240 is a second screw, which is threadedly engaged with the mounting base 210. The axis of the second screw is parallel to the axis of the valve stem 110, so that the second screw can abut against the top surface 102 of the valve body 100, and the end of the second screw that abuts against the top surface 102 of the valve body 100 is a smooth surface. In this way, by rotating the second screw, the second screw moves along its axial direction relative to the mounting seat 210 toward the top surface 102 of the valve body 100 until the smooth surface of the second screw abuts against the top surface 102. Since the surface of the second screw that abuts against the top surface 102 is a smooth surface, the second screw can continue to rotate. Furthermore, since the mounting seat 210 is sleeved on the outer periphery of the packing gland 120, the mounting seat 210 does not rotate synchronously with the second screw. Therefore, under the action of the continuous rotation of the second screw, the mounting seat 210 can move upward along the axial direction of the valve stem 110, thereby driving the connecting member 220 and the packing gland 300 fixedly connected to the connecting member 220 to simultaneously disengage from the packing gland 120, so as to remove the packing gland 300.

[0053] It should be noted that before lifting the mounting base 210, the fixing part 230 needs to be moved away from the valve body 100 to release the relative fixation between the mounting base 210 and the valve body 100.

[0054] To improve the lifting efficiency of the mounting base 210, there are at least two second screws, and the at least two second screws are distributed sequentially along the circumference of the mounting base 210. In this way, by rotating at least two second screws, the mounting base 210 can be driven to move upward, thereby improving the lifting efficiency of the mounting base 210.

[0055] like Figure 2 and Figure 4 As shown, there are four second screws, which are distributed sequentially along the circumference of the mounting base 210, and the included angle between adjacent second screws is 90°. In this way, by rotating the four second screws, the four second screws can radially limit the mounting base 210, which improves the stability of the mounting base 210 during the upward movement process and improves the lifting efficiency of the mounting base 210.

[0056] In practice, the connector 220, the fastener 230, and the lifting member 240 can all be connected to the mounting base 210, or they can be installed with the mounting base 210 when needed. This application embodiment does not limit this.

[0057] In the use of the packing removal device provided in this application embodiment, the mounting base 210 is first fitted onto the outer periphery of the packing box 120. Then, the fixing member 230 is rotated until the fixing member 230 abuts against the circumferential side wall 101 of the valve body 100, thereby fixing the mounting base 210 relative to the valve body 100. Then, the connecting member 220 is rotated so that the connecting member 220 enters the packing box 120 along its axial direction and fixes all the packing 300. Then, the fixing member 230 is rotated so that the fixing member 230 moves away from the valve body, thereby releasing the relative fixation between the mounting base 210 and the valve body 100. Then, the lifting member 240 is continuously rotated toward the top surface 102 of the valve body 100. Under the action of the threaded connection, the mounting base 210 and the connecting member 220, which is fixedly connected to the packing 300, move synchronously along the axial direction of the valve stem 110 toward the end away from the packing box 120, thereby removing the packing 300 from the packing box 120. In this way, during the process of the connector 220 being inside the packing gland 120, there is a gap between the connector 220 and the valve stem 110 and the packing gland 120, which reduces the damage to the valve stem 110 and the packing gland 120 caused by the removal of the packing gland 300.

[0058] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A packing removal device, characterized in that, include: Mounting base (210) and connector (220); The mounting base (210) is used to fit around the outer periphery of the packing gland (120), and the mounting base (210) and the packing gland (120) are detachably and fixedly connected; the mounting base (210) has a through hole (211) for the valve stem (110) to pass through; The connector (220) is movably disposed on the mounting base (210) along its axial direction, such that the connector (220) is located inside the packing box (120) and fixedly connected to the packing (300), and the connector (220) can be disengaged from the packing box (120) along with the mounting base (210). When the connector (220) is located inside the packing gland (120), the connector (220) has gaps with the packing gland (120) and the valve stem (110).

2. The packing extraction device according to claim 1, characterized by There are at least two connectors (220), and at least two connectors (220) are distributed sequentially along the circumference of the mounting base (210); And / or, the connector (220) can be fixedly connected to all the packings (300) within the packing box (120).

3. The packing extraction device according to claim 1, characterized by The connector (220) is provided with a tip (221) for insertion into the packing (300), and the tip (221) tapers along the axial direction of the connector (220).

4. The packing extraction device according to claim 1, characterized by The connector (220) is a long screw that is threaded into the mounting base (210) and is used to fix the connection with the packing (300).

5. The packing extraction device according to claim 1, characterized by It also includes a fastener (230) for securing the mounting base (210) and the valve body (100) together.

6. The packing extraction device according to claim 5, characterized by The mounting base (210) has a mounting hole for mounting the fixing member (230), the mounting hole is arranged radially along the mounting base (210), the fixing member (230) is used to abut against the circumferential sidewall (101) of the valve body (100) through the mounting hole, and the fixing member (230) is movable relative to the mounting base (210) along the mounting hole; And / or, the fastener (230) is a first screw, which is threadedly engaged with the mounting base (210).

7. The packing extraction device according to claim 5, characterized by There are at least two fasteners (230), and at least two fasteners (230) are distributed sequentially along the circumference of the mounting base (210), and there is an included angle between adjacent fasteners (230).

8. The packing removal device according to claim 1, characterized by It also includes a lifting member (240) for connection with the mounting base (210), the lifting member (240) enabling the mounting base (210) and the connecting member (220) fixedly connected to the packing (300) to move synchronously along the axial direction of the valve stem (110) away from the packing gland (120).

9. The packing removal device according to claim 8, characterized in that, The lifting member (240) is a second screw, which is threadedly engaged with the mounting base (210). The axis of the second screw is parallel to the axis of the valve stem (110). The second screw is used to abut against the top surface (102) of the valve body (100), and the end of the second screw that abuts against the top surface (102) is a smooth surface.

10. The packing removal device according to claim 9, characterized in that, There are at least two second screws, and at least two second screws are distributed sequentially along the circumference of the mounting base.

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