Check stop valve for crane pipe purging pipeline

Abstract

The utility model discloses a check stop valve for a crane pipe purging pipeline, and belongs to the technical field of crane pipes. Comprising a valve body and a boss, wherein a cavity is axially formed in the valve body in a penetrating mode, and a channel communicated with the cavity is formed in the side wall of one side of the valve body; the boss is circumferentially arranged on the inner wall of the cavity and located on one side of the channel; the cut-off component is axially and movably arranged at one end in the cavity and matched with the channel, the elastic non-return component is arranged at the other end in the cavity through a plug and matched with the cut-off component, the cut-off component and the elastic non-return component are located on the two sides of the boss respectively and matched with the boss, and the plug is located at a port of the cavity and is axially provided with a through hole; the cavity of the valve body is communicated with the loading arm through the through hole in the plug and is communicated with the purging pipeline through the channel at the same time. The check stop valve is compact in overall structure, the functions of pipeline on-off control and pipeline medium backflow prevention can be achieved at the same time, the sealing performance of the valve is guaranteed while quick opening and closing of the valve are achieved, and the overall performance of the valve can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of loading arms, and particularly relates to a check and stop valve for a purge pipeline of a loading arm. Background Art

[0002] In industries such as petroleum, chemical engineering, and pharmaceuticals, loading arms, as a commonly used pipeline transportation device, are widely used in the transportation process of various media. In the purge system of a loading arm, to ensure the safe and stable operation of the pipeline system, after the loading arm completes the transportation of the medium, the pipeline needs to be purged to remove impurities and residual media in the pipeline. During this process, traditional purge pipeline control valves usually use ordinary single stop valves or ball valves. Although they can control the flow of the medium, the medium in the loading arm pipeline is prone to flow back into the purge pipeline. This phenomenon will cause corrosion and damage to the purge pipeline, affecting the normal operation of the pipeline system. Moreover, during the long-term use of traditional stop valves, the sealing surface between the valve flap and the valve body is prone to wear, resulting in valve leakage.

[0003] Therefore, there is a need for a check and stop valve for a purge pipeline of a loading arm that has good sealing performance and can simultaneously achieve pipeline on-off control and prevent the reverse flow of pipeline media. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a check and stop valve for a purge pipeline of a loading arm, with a compact overall structure, which can simultaneously achieve the functions of pipeline on-off control and prevent the reverse flow of pipeline media, ensure the sealing performance of the valve while realizing the rapid opening and closing of the valve, and can effectively improve the overall performance of the valve.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A check and stop valve for a purge pipeline of a loading arm, comprising a valve body with an axially penetrating cavity and a channel communicated with the cavity on one side wall, a convex platform circumferentially arranged on the inner wall of the cavity of the valve body and located on one side of the channel, a stop component axially movably arranged at one end in the cavity and adapted to the channel, and an elastic check component arranged at the other end in the cavity through a plug and cooperating with the stop component, wherein the stop component and the elastic check component are respectively located on both sides of the convex platform and adapted to it, and the plug is located at the port of the cavity and axially provided with a through hole; the cavity of the valve body is communicated with the loading arm through the through hole on the plug and communicated with the purge pipeline through the channel. When the stop component axially moves along the cavity to open or block the channel and the convex platform, under the pressure difference between the purge pipeline and the loading arm, the elastic check component also axially moves along the cavity and cooperates with the stop component to open or block the convex platform.

[0007] A further improvement of the technical solution of the present utility model lies in that: the elastic check component includes a check valve flap with one end adapted to the boss and the other end provided with a positioning groove, and a spring with one end arranged in the positioning groove of the check valve flap and the other end connected to the plug.

[0008] A further improvement of the technical solution of the present utility model lies in that: a plurality of guiding ribs adapted to the cavity are evenly spaced along the circumferential direction of the outer wall of the check valve flap, and an installation groove is formed in the end face of the check valve flap close to the boss, and a sealing gasket one adapted to the boss is arranged in the installation groove.

[0009] A further improvement of the technical solution of the present utility model lies in that: the shut-off component includes a valve stem with a handle at one end and the other end extending into the cavity and being threadedly connected thereto, and a shut-off valve flap inserted at the end of the valve stem extending into the cavity and adapted to the boss.

[0010] A further improvement of the technical solution of the present utility model lies in that: a plug-in member is arranged at the end of the valve stem extending into the cavity, including a clamping block with one end connected to the end of the valve stem through a connecting column and the other end being spherical, and the diameter of the clamping block is larger than that of the connecting column.

[0011] A further improvement of the technical solution of the present utility model lies in that: the shut-off valve flap is of a cylindrical structure, an insertion groove adapted to the plug-in member is axially formed in one end face thereof, an assembly groove is formed in the other end face thereof, and a sealing gasket two adapted to the boss is arranged in the assembly groove, wherein one side of the insertion groove radially penetrates the side wall of the shut-off valve flap.

[0012] A further improvement of the technical solution of the present utility model lies in that: a sealing structure is arranged between the cavity of the valve body and the valve stem, including a packing gasket, packing and a packing gland sleeved on the valve stem in sequence along the axial direction, and a lock nut sleeved on the packing gland is arranged at the end of the valve body.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model is:

[0014] The check and shut-off valve of the present utility model for the purge pipeline of the loading arm has a compact overall structure, can simultaneously realize the functions of controlling the on-off of the pipeline and preventing the backflow of the pipeline medium, ensure the sealing performance of the valve while realizing the quick opening and closing of the valve, and can effectively improve the overall performance of the valve. Brief Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the check and shut-off valve of the present utility model;

[0016] Figure 2 is a structural schematic diagram of the check and shut-off valve of the present utility model during the purge operation;

[0017] Figure 3 is a structural schematic diagram of the check valve flap in the check and shut-off valve of the present utility model;

[0018] Figure 4 is a schematic structural view of the stop valve flap in the check and stop valve of the present utility model;

[0019] Figure 5 is a schematic structural view of the plug-in part on the valve stem in the check and stop valve of the present utility model;

[0020] Figure 6 is an assembly schematic view of the plug-in part and the stop valve flap in the check and stop valve of the present utility model;

[0021] Among them, 1. Plug, 2. Valve body, 3. Spring, 4. Check valve flap, 4-1. Installation groove, 4-2. Guide rib, 5. Sealing gasket one, 6. Sealing gasket two, 7. Stop valve flap, 7-1. Plug-in groove, 7-2. Assembly groove, 8. Packing gasket, 9. Packing, 10. Packing gland, 11. Lock nut, 12. Valve stem, 12-1. Plug-in part, 13. Handle, 14. Channel, 15. Boss, 16. Cavity. Specific embodiments

[0022] The following further describes the present utility model in detail with reference to embodiments:

[0023] As Figure 1 shown, the present utility model provides a check and stop valve for a swivel arm purge pipeline, including a valve body 2 and a boss 15, a stop component and an elastic check component that are cooperatively arranged in the valve body 2. Specifically, the main body of the valve body 2 is a cylindrical structure. The valve body 2 is axially penetrated with a cavity 16, and a channel 14 communicating with the cavity 16 is provided on the side wall of one side thereof. The boss 15 is circumferentially arranged on the inner wall of the cavity 16 of the valve body 2. Therefore, a central hole is formed in the center of the boss 15, and the boss 15 is arranged on one side of the channel 14. The stop component is axially movably arranged at one end in the cavity 16 and is adapted to the channel 14. The elastic check component is arranged at the other end in the cavity 16 through a plug 1. The elastic check component cooperates with the stop component, and the two are respectively located on both sides of the boss 15 and are adapted to the boss 15. Among them, the plug 1 is located at the port of the cavity 16 and axially opens a through hole. The through hole on the plug 1 and the channel 14 can be communicated through the cavity 16. The cavity 16 of the valve body 2 is communicated with the swivel arm through the through hole on the plug 1, and at the same time, the cavity 16 of the valve body 2 is also communicated with the purge pipeline through the channel 14, thereby forming a purge path.

[0024] As Figure 2As shown, when the shut-off component moves axially along the cavity 16 to open or block the channel 14 and the boss 15, under the differential pressure between the purging pipeline and the swivel arm, the elastic check component also moves axially along the cavity 16 and cooperates with the shut-off component to open or block the boss 15. Specifically, when purging the swivel arm is required, the shut-off component is controlled to move axially along the cavity 16 to open the channel 14 and the boss 15. The pressure applied to the inside of the channel 14 by the purging pipeline is greater than the pressure inside the swivel arm. At this time, the purging medium in the purging pipeline applies pressure to the elastic check component through the channel 14 and the central hole of the boss 15. The elastic check component moves axially along the cavity 16 under the pressure and contracts to open the boss 15, so that the purging medium in the purging pipeline sequentially passes through the channel 14, the central hole of the boss 15, and the through hole on the plug 1 and enters the swivel arm for purging; after the purging of the swivel arm is completed, the shut-off component is controlled to move axially along the cavity 16 to block the channel 14 and the boss 15. The pressure applied to the inside of the channel 14 by the purging pipeline is less than the pressure inside the swivel arm. At this time, the elastic check component moves axially along the cavity 16 under its own elastic force and resets to block the boss 15. In the above process, the elastic check component and the shut-off component always move in opposite directions in cooperation on both sides of the boss 15, so as to realize the simultaneous blocking or opening of the boss 15 by the two components.

[0025] Specifically, the elastic check component includes a check valve flap 4 and a spring 3. One end of the check valve flap 4 is adapted to the boss 15, and a positioning groove is provided at the other end thereof. One end of the spring 3 is arranged in the positioning groove of the check valve flap 4, and the other end thereof is connected to the plug 1, which can ensure that the acting force direction of the spring 3 is accurate and the acting force is uniform, so as to ensure the sealing performance of the check valve flap 4. As Figure 3 shown, in order to ensure that the check valve flap 4 can move axially in the cavity 16 of the valve body 2, a plurality of guide ribs 4-2 adapted to the cavity 16 are uniformly arranged at intervals along the circumferential direction of the outer wall of the check valve flap 4. At the same time, the interval between the guide ribs 4-2 can ensure that the purging medium passes through smoothly. In addition, an installation groove 4-1 is provided at the end face of the check valve flap 4 close to the boss 15, and a sealing gasket 5 adapted to the boss 15 is arranged in the installation groove 4-1.

[0026] The shut-off component includes a valve stem 12 and a shut-off valve flap 7. One end of the valve stem 12 is provided with a handle 13, and the other end thereof extends into the cavity 16 and is threadedly connected to the cavity 16. The shut-off valve flap 7 is inserted at the end of the valve stem 12 extending into the cavity 16 and is adapted to the boss 15. Specifically, as Figures 4 - 6As shown, at one end of the valve stem 12 extending into the cavity 16, there is a socket 12-1. The socket 12-1 includes a connecting column and a clamping block. One end of the clamping block is connected to the end of the valve stem 12 through the connecting column, and the other end is set as a spherical surface. Moreover, the diameter of the clamping block is larger than that of the connecting column. The main body of the globe valve disc 7 is of a cylindrical structure. An axially opened socket groove 7-1 adapted to the socket 12-1 is provided at one end face along the axis, and an assembly groove 7-2 is provided at the other end face. And a second sealing gasket 6 adapted to the boss 15 is arranged in the assembly groove 7-2. In order to facilitate the insertion of the globe valve disc 7 and the socket 12-1, one side of the socket groove 7-1 radially penetrates through the side wall of the globe valve disc 7, presenting a semi-open structure. The socket 12-1 on the valve stem 12 can be inserted into it from one side of the socket groove 7-1.

[0027] During operation, the valve stem 12 can be screwed by the handle 13 to make it axially move spirally in the cavity 16 of the valve body 2, so as to drive the globe valve disc 7 at the end of the valve stem 12 to abut against the boss 15 to block it or move away from the boss 15 to open it. Since the non-fixed connection method of insertion is adopted between the valve stem 12 and the globe valve disc 7, when the globe valve disc 7 abuts against the boss 15, it can effectively prevent the globe valve disc 7 from rotating together with the valve stem 12, effectively reducing the wear of the second sealing gasket 6 of the globe valve disc 7 and improving the service life of the second sealing gasket 6.

[0028] In order to ensure the sealing performance of the whole structure, a sealing structure is arranged between the cavity 16 of the valve body 2 and the valve stem 12. The sealing structure includes a packing gasket 8, a packing 9 and a packing gland 10 sleeved on the valve stem 12 in sequence along the axis. Preferably, two groups of packings 9 are arranged. The valve body 2 cooperates with the valve stem 12. The valve body 2 is provided with a lock nut 11 at its end, and the lock nut 11 is sleeved on the packing gland 10 to lock and fasten it.

[0029] It can be understood that the present utility model is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A check and stop valve for a swivel pipe purging pipeline, characterized in that: It includes a valve body (2) with an axially penetrating cavity (16) and a channel (14) communicated with the cavity (16) provided on one side wall, a boss (15) circumferentially arranged on the inner wall of the cavity (16) of the valve body (2) and located on one side of the channel (14), a shut-off component axially movably arranged at one end in the cavity (16) and adapted to the channel (14), and an elastic check component arranged at the other end in the cavity (16) through a plug (1) and cooperating with the shut-off component, wherein the shut-off component and the elastic check component are respectively located on both sides of the boss (15) and adapted to it, and the plug (1) is located at the port of the cavity (16) and axially provided with a through hole; the cavity (16) of the valve body (2) is communicated with the swivel pipe through the through hole on the plug (1) and at the same time is communicated with the purging pipeline through the channel (14). When the shut-off component axially moves along the cavity (16) to open or block the channel (14) and the boss (15), under the pressure difference between the purging pipeline and the swivel pipe, the elastic check component also axially moves along the cavity (16) and cooperates with the shut-off component to open or block the boss (15).

2. The check and stop valve for the swivel pipe purging pipeline according to claim 1, characterized in that: The elastic check component includes a check valve flap (4) with one end adapted to the boss (15) and a positioning groove opened at the other end, and a spring (3) with one end arranged in the positioning groove of the check valve flap (4) and the other end connected to the plug (1).

3. The check and stop valve for the swivel arm purging pipeline according to claim 2, characterized in that: A plurality of guide ribs (4-2) adapted to the cavity (16) are circumferentially and evenly spaced along the outer wall of the check valve flap (4), and an installation groove (4-1) is opened at the end face of the check valve flap (4) close to the boss (15), and a first sealing gasket (5) adapted to the boss (15) is arranged in the installation groove (4-1).

4. A check and stop valve for a swivel pipe purging pipeline according to claim 3, characterized in that: The shut-off component includes a valve stem (12) with a handle (13) at one end and the other end extending into the cavity (16) and threadedly connected thereto, and a globe valve disc (7) inserted at the end of the valve stem (12) extending into the cavity (16) and adapted to the boss (15).

5. The check and stop valve for the swivel arm purging pipeline according to claim 4, wherein: One end of the valve stem (12) extending into the cavity (16) is provided with a plug-in component (12-1), which includes a clamping block with one end connected to the end of the valve stem (12) through a connecting column and the other end being a spherical surface, and the diameter of the clamping block is larger than that of the connecting column.

6. The check and stop valve for the swivel pipe purging pipeline according to claim 5, characterized in that: The globe valve disc (7) is of a cylindrical structure. An insertion groove (7-1) adapted to the plug-in component (12-1) is axially opened at one end face thereof, and an assembly groove (7-2) is opened at the other end face, and a second sealing gasket (6) adapted to the boss (15) is arranged in the assembly groove (7-2), wherein one side of the insertion groove (7-1) radially penetrates the side wall of the globe valve disc (7).

7. A check and stop valve for a swivel arm purging pipeline according to any one of claims 4 - 6, characterized in that: A sealing structure is arranged between the cavity (16) of the valve body (2) and the valve stem (12), which includes a packing gasket (8), packing (9), and a packing gland (10) axially sleeved on the valve stem (12) in sequence, and a lock nut (11) sleeved on the packing gland (10) is arranged at the end of the valve body (2).

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