Coaxiality stop valve

Abstract

The invention discloses a coaxiality stop valve and belongs to the technical field of stop valves, the coaxiality stop valve comprises a valve body, a valve cover, a valve rod and a valve clack, the valve rod comprises an upper valve rod body and a lower valve rod body, the top of the upper valve rod body is connected with an upper top end cover of the valve cover, and the bottom of the lower valve rod body is connected with the valve clack of the valve body; four clamping holes distributed at equal intervals are formed in the outer walls of the ends, close to each other, of the upper valve rod and the lower valve rod, the ends, close to each other, of the upper valve rod and the lower valve rod are fixedly sleeved with a connecting assembly, and the connecting assembly comprises a main sleeve and two fastening sleeves. The upper valve rod and the lower valve rod are conveniently and rapidly mounted and dismounted, force generated when the upper valve rod and the lower valve rod are pulled is conveniently buffered through the buffering effect of the first buffering spring and the second buffering spring, and therefore the valve rods are effectively prevented from being broken and bent, and the service life of the valve rods is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of stop valves, and in particular to a coaxial stop valve. Background Art

[0002] The stop valve is a common industrial pipeline valve, mainly used for the opening and closing control of the fluid in the pipeline. Its structural design allows the flow of the fluid to be switched on and off by rotating the valve stem. The main feature of the stop valve is that when the valve is fully opened or closed, the flow of the fluid is completely blocked. It is usually used in situations where precise flow control is required.

[0003] The working principle of the stop valve is to promote the contact between the valve core and the valve seat by rotating the valve stem, thereby controlling the flow of the fluid. When the valve is closed, the valve core and the valve seat are sealed to prevent the fluid from passing through; when the valve is opened, the valve core and the valve seat are separated, allowing the fluid to pass freely. It is widely used in various industries and pipeline systems, especially in places where frequent opening and closing or precise flow control is required.

[0004] However, since the pull rod of the traditional stop valve is long, during the operation of the stop valve, the pull rod is easily broken or twisted during the up and down displacement, which affects its service life. Therefore, we propose a coaxial stop valve to solve the above problem. Summary of the invention

[0005] The purpose of the present invention is to propose a coaxial stop valve to solve the problem that the pull rod of the traditional stop valve is long and the pull rod is easy to break or bend during the up and down displacement of the stop valve during operation, thereby affecting its service life.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: a coaxial stop valve: comprising a valve body, a valve cover, a valve stem and a valve disc, wherein the valve stem comprises an upper valve stem and a lower valve stem;

[0007] The top of the upper valve stem is connected to the top cover of the valve cover, the bottom of the lower valve stem is connected to the valve disc of the valve body, and the outer wall of the end of the upper valve stem and the lower valve stem close to each other is provided with four equally spaced holes;

[0008] A connecting assembly is fixedly sleeved on one end of the upper valve stem and the lower valve stem close to each other, and the connecting assembly includes a main sleeve and two fastening sleeves, and the two fastening sleeves are symmetrically fixedly connected to the two ends of the main sleeve, and the inner wall of the main sleeve is provided with four slide grooves distributed at equal intervals along the center of the main sleeve, and a guide rod is fixedly installed inside the slide groove, and the middle outer wall of the guide rod is sleeved with a second buffer spring, and the outer walls of the two ends of the guide rod are symmetrically sleeved with a first buffer spring, and the two ends of the guide rod are symmetrically sleeved with a clamping assembly;

[0009] The clamping assembly includes a slider slidably connected to the inner wall of the slide groove, a moving groove is opened on one side of the slider, a moving block is slidably connected to the inner wall of the moving groove, installation grooves are symmetrically opened on both sides of the moving groove, a guide column is fixedly installed inside the installation groove, a return spring is sleeved on the outer wall of one end of the guide column, a guide block is movably sleeved on one end of the guide column close to the return spring, one side of the guide block is fixedly connected to the moving block, and a clamping column is fixedly connected to the middle part of one side of the moving block.

[0010] As a further description of a coaxial stop valve of the above technology: the outer wall of the main sleeve is provided with a plurality of through grooves distributed at equal intervals, and the through grooves are connected to the slide grooves.

[0011] As a further description of a coaxial stop valve of the above technology: a pull rod is fixedly connected to the side of the moving block away from the clamping column, and the pull rod extends to the outside through the slider, and the pull rod is slidably fitted with the inner wall of the through groove.

[0012] As a further description of a coaxial stop valve of the above technology: sliding blocks are symmetrically fixedly connected to both sides of the slider, sliding grooves are symmetrically opened on both sides of the slide groove, and the sliding blocks and the sliding grooves form a sliding connection structure.

[0013] As a further description of the above technology, a coaxial stop valve: the two ends of the second buffer spring are fixed between two sliders, the ends of the upper valve stem and the lower valve stem close to each other are rounded, the outer end of the clamping column is rounded, and the clamping column is adapted to the clamping hole.

[0014] As a further description of the above-mentioned technology, a coaxial stop valve is provided: an upper diaphragm flap is arranged in the middle of the upper valve stem, the top of the upper diaphragm flap is connected to the bottom of the valve cover by screws, and a movable plug is also sleeved on the upper part of the upper valve stem, and the movable plug divides the internal space of the valve cover into an upper air pressure chamber and a lower air pressure chamber.

[0015] As a further description of a coaxial stop valve of the above technology: a lower diaphragm flap is arranged in the middle of the lower valve stem, and the bottom of the lower diaphragm flap is connected to the top of the valve body by screws.

[0016] In summary, due to the use of the above-mentioned technology, the coaxial stop valve of the present invention has the following beneficial effects:

[0017] The present invention is provided with a connecting component. When the device is used, the upper valve stem and the lower valve stem are connected by the connecting component, which ensures that the upper valve stem and the lower valve stem are on the same axis. At the same time, the installation and disassembly are convenient, and the upper valve stem and the lower valve stem can be quickly installed and disassembled, which is convenient for replacement. In the operation of the stop valve, the up and down pulling of the valve stem will generate a pulling force on the middle part of the valve stem, so that the two ends of the upper valve stem and the lower valve stem slide slightly on the inner wall of the main sleeve, so that the slider slides up and down along the guide rod to squeeze the first buffer spring and the second buffer spring. Through the buffering effect of the first buffer spring and the second buffer spring, it is convenient to buffer the force generated when the upper valve stem and the lower valve stem are pulled, thereby effectively preventing the valve stem from breaking and bending, which is beneficial to improving its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It shows a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of an overall cross-sectional structure provided by an embodiment of the present invention is shown;

[0020] Figure 3 A schematic diagram of a cross-section of a connection assembly and a valve stem connection structure provided in an embodiment of the present invention is shown;

[0021] Figure 4 A schematic diagram of a cross-sectional structure of a main sleeve provided in an embodiment of the present invention is shown;

[0022] Figure 5 for Figure 3 A schematic diagram of the enlarged structure at point A;

[0023] Figure 6 A schematic cross-sectional structure diagram of a clamping assembly provided according to an embodiment of the present invention is shown.

[0024] Figure numerals: 1. valve body; 2. valve cover; 3. upper valve stem; 4. lower valve stem; 5. upper diaphragm flap; 6. lower diaphragm flap; 7. connecting assembly; 71. main sleeve; 72. slide groove; 73. fastening sleeve; 74. clamping assembly; 741. slider; 742. sliding block; 743. pull rod; 744. moving groove; 745. mounting groove; 746. reset spring; 747. guide column; 748. guide block; 749. moving block; 750. clamping column; 75. guide rod; 76. first buffer spring; 77. second buffer spring; 78. through groove; 79. sliding groove; 8. movable plug; 9. valve flap; 10. clamping hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the coaxial stop valve in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a coaxial stop valve, please refer to Figure 1-6 As shown, it includes a valve body 1, a valve cover 2, a valve stem and a valve disc 9, and the valve stem includes an upper valve stem 3 and a lower valve stem 4;

[0027] The top of the upper valve stem 3 is connected to the top cover of the valve cover 2, and the bottom of the lower valve stem 4 is connected to the valve disc 9 of the valve body 1. Four equally spaced holes 10 are provided on the outer wall of the end where the upper valve stem 3 and the lower valve stem 4 are close to each other.

[0028] A connecting assembly 7 is fixedly sleeved at one end of the upper valve stem 3 and the lower valve stem 4 that are close to each other. The connecting assembly 7 includes a main sleeve 71 and two fastening sleeves 73. The two fastening sleeves 73 are symmetrically fixedly connected to the two ends of the main sleeve 71. The inner wall of the main sleeve 71 is provided with four slide grooves 72 that are evenly spaced along the center of the main sleeve 71. A guide rod 75 is fixedly installed inside the slide groove 72. The middle outer wall of the guide rod 75 is sleeved with a second buffer spring 77. The outer walls of both ends of the guide rod 75 are symmetrically sleeved with first buffer springs 76. The outer wall of the main sleeve 71 is provided with a plurality of through grooves 78 that are evenly spaced. The through grooves 78 are connected to the slide grooves 72. The two ends of the guide rod 75 are symmetrically sleeved with a clamping assembly 74.

[0029] The clamping assembly 74 includes a slider 741 slidably connected to the inner wall of the slide groove 72, a movable groove 744 is opened on one side of the slider 741, a movable block 749 is slidably connected to the inner wall of the movable groove 744, installation grooves 745 are symmetrically opened on both sides of the movable groove 744, a guide column 747 is fixedly installed inside the installation groove 745, a return spring 746 is sleeved on the outer wall of one end of the guide column 747, a guide block 748 is movably sleeved on one end of the guide column 747 close to the return spring 746, one side of the guide block 748 is fixedly connected to the movable block 749, and a clamping column 750 is fixedly connected to the middle part of one side of the movable block 749.

[0030] When the upper valve stem 3 is connected to the lower valve stem 4, first, the upper valve stem 3 is aligned with the upper port of the connecting assembly 7 and inserted, so that the upper valve stem 3 is inserted into the main sleeve 71 along the fastening sleeve 73. In the process of inserting the upper valve stem 3 into the main sleeve 71, the reset spring 746 is compressed first and then reset, so that the clamping column 750 is clamped in the clamping hole 10, thereby ensuring the stability of the connection between the upper valve stem 3 and the main sleeve 71. On the contrary, it is only necessary to pull the pull rod 743 outward, and the pull rod 743 drives the moving block 749 to move outward along the moving groove 744, thereby driving the guide block 748 to slide outward along the installation groove 745 to squeeze the reset spring 746, and then drive the clamping column 750 to disengage from the clamping hole 10, and then the upper valve stem 3 can be disassembled. The operation is convenient and convenient for quickly installing and disassembling the upper valve stem 3. Similarly, it is also convenient for quickly installing and disassembling the lower valve stem 4.

[0031] During the operation of the stop valve, the connecting component 7 is used to ensure that the centers of the upper valve stem 3 and the lower valve stem 4 are on the same axis. The water flow impacts the valve disc 9, which generates an upward force to squeeze the lower valve stem 4, so that the lower valve stem 4 slides slightly up and down along the inner wall of the main sleeve 71, and the slider 741 slides up and down along the guide rod 75. Through the buffering effect of the first buffer spring 76 and the second buffer spring 77, the extrusion force generated when the upper valve stem 3 and the lower valve stem 4 are pulled can be buffered, thereby effectively preventing the valve stem from breaking and increasing its service life.

[0032] Furthermore, a pull rod 743 is fixedly connected to one side of the moving block 749 away from the clamping column 750. The pull rod 743 extends to the outside through the slider 741, and the pull rod 743 slides in contact with the inner wall of the through groove 78. When in use, the pull rod 743 slides up and down along the through groove 78, thereby allowing the slider 741 to slide slightly up and down along the slide groove 72.

[0033] Furthermore, sliding blocks 742 are symmetrically fixedly connected on both sides of the slider 741, and sliding grooves 79 are symmetrically opened on both sides of the sliding groove 72. The sliding blocks 742 and the sliding grooves 79 constitute a sliding connection structure. When in use, the sliding blocks 742 slide along the sliding grooves 79, making the movement of the slider 741 smoother.

[0034] Furthermore, both ends of the second buffer spring 77 are fixed between the two sliders 741, the ends of the upper valve stem 3 and the lower valve stem 4 that are close to each other are rounded, the outer end of the clamping column 750 is rounded, and the clamping column 750 is adapted to the clamping hole 10. When in use, the ends of the upper valve stem 3 and the lower valve stem 4 that are close to each other are rounded to facilitate insertion into the connecting component 7, and the outer end of the clamping column 750 is rounded to facilitate insertion of the clamping column 750 into the clamping hole 10.

[0035] Furthermore, an upper diaphragm flap 5 is provided in the middle of the upper valve stem 3, the top of the upper diaphragm flap 5 is connected to the bottom of the valve cover 2 by screws, and a movable plug 8 is also sleeved on the upper part of the upper valve stem 3, and the movable plug 8 divides the internal space of the valve cover 2 into an upper air pressure chamber and a lower air pressure chamber.

[0036] Furthermore, a lower diaphragm flap 6 is provided in the middle of the lower valve stem 4, and the bottom of the lower diaphragm flap 6 is connected to the top of the valve body 1 by screws.

[0037] The working principle of the present invention is as follows: when using, when connecting the upper valve stem 3 with the lower valve stem 4, first, align the upper valve stem 3 with the upper port of the connecting assembly 7 and insert it, so that the upper valve stem 3 is inserted into the main sleeve 71 along the fastening sleeve 73. In the process of inserting the upper valve stem 3 into the main sleeve 71, the reset spring 746 is compressed first and then reset, so that the clamping column 750 is clamped in the clamping hole 10, thereby ensuring the stability of the connection between the upper valve stem 3 and the main sleeve 71. On the contrary, it is only necessary to pull the pull rod 743 outwards, and the pull rod 743 drives the moving block 749 to move outwards along the moving groove 744, thereby driving the guide block 748 to slide outwards along the installation groove 745 to squeeze the reset spring 746, and then drive the clamping column 750 to disengage from the clamping hole 10, and then the upper valve stem 3 can be disassembled. The operation is convenient and convenient for quickly installing and disassembling the upper valve stem 3. Similarly, it is also convenient for quickly installing and disassembling the lower valve stem 4.

[0038] During the operation of the stop valve, the connection assembly 7 is used to ensure that the centers of the upper valve stem 3 and the lower valve stem 4 are on the same axis. During the up and down displacement of the valve stem, a pulling force is generated, causing the middle part of the valve stem to bend and break. During the pulling process of the upper valve stem 3 and the lower valve stem 4, the upper valve stem 3 and the lower valve stem 4 slide slightly up and down along the inner wall of the main sleeve 71, so that the slider 741 slides up and down along the guide rod 75. Through the buffering effect of the first buffer spring 76 and the second buffer spring 77, the force generated when the upper valve stem 3 and the lower valve stem 4 are pulled can be buffered, thereby effectively preventing the valve stem from breaking and increasing its service life.

[0039] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacement or changes to a coaxial stop valve and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coaxial stop valve, comprising a valve body (1), characterized in that: It also comprises a valve cover (2), a valve stem and a valve flap (9), wherein the valve stem comprises an upper valve stem (3) and a lower valve stem (4); The top of the upper valve stem (3) is connected to the top cover of the valve cover (2), the bottom of the lower valve stem (4) is connected to the valve disc (9) of the valve body (1), and the outer wall of the end of the upper valve stem (3) and the lower valve stem (4) close to each other is provided with four clamping holes (10) distributed at equal intervals; A connecting assembly (7) is fixedly sleeved on one end of the upper valve stem (3) and the lower valve stem (4) close to each other, and the connecting assembly (7) includes a main sleeve (71) and two fastening sleeves (73). The two fastening sleeves (73) are symmetrically fixedly connected to the two ends of the main sleeve (71). The inner wall of the main sleeve (71) is provided with four slide grooves (72) distributed at equal intervals along the center of the main sleeve (71). A guide rod (75) is fixedly installed inside the slide groove (72). The middle outer wall of the guide rod (75) is sleeved with a second buffer spring (77). The outer walls of both ends of the guide rod (75) are symmetrically sleeved with first buffer springs (76). The two ends of the guide rod (75) are symmetrically and movably sleeved with a clamping assembly (74). The clamping assembly (74) includes a slider (741) slidably connected to the inner wall of the slide groove (72), a movable groove (744) is provided on one side of the slider (741), a movable block (749) is slidably connected to the inner wall of the movable groove (744), mounting grooves (745) are symmetrically provided on both sides of the movable groove (744), a guide column (747) is fixedly installed inside the mounting groove (745), a return spring (746) is sleeved on the outer wall of one end of the guide column (747), a guide block (748) is movably sleeved on one end of the guide column (747) close to the return spring (746), one side of the guide block (748) is fixedly connected to the movable block (749), and a clamping column (750) is fixedly connected to the middle part of one side of the movable block (749).

2. A coaxial stop valve according to claim 1, characterized in that: The outer wall of the main sleeve (71) is provided with a plurality of through grooves (78) distributed at equal intervals, and the through grooves (78) are connected to the slide groove (72).

3. A coaxial stop valve according to claim 2, characterized in that: A pull rod (743) is fixedly connected to one side of the moving block (749) away from the clamping column (750); the pull rod (743) passes through the slider (741) and extends to the outside; the pull rod (743) is slidably fitted with the inner wall of the through slot (78).

4. A coaxial stop valve according to claim 1, characterized in that: The two sides of the slider (741) are symmetrically fixedly connected with sliding blocks (742), and the two sides of the slide groove (72) are symmetrically provided with sliding grooves (79) in an upper and lower manner. The sliding blocks (742) and the sliding grooves (79) form a sliding connection structure.

5. A coaxial stop valve according to claim 1, characterized in that: The two ends of the second buffer spring (77) are fixed between the two sliders (741), the ends of the upper valve stem (3) and the lower valve stem (4) that are close to each other are both rounded, the outer end of the clamping column (750) is rounded, and the clamping column (750) is compatible with the clamping hole (10).

6. A coaxial stop valve according to claim 1, characterized in that: An upper diaphragm flap (5) is arranged in the middle of the upper valve stem (3), and the top of the upper diaphragm flap (5) is connected to the bottom of the valve cover (2) by screws. A movable plug (8) is also sleeved on the upper part of the upper valve stem (3), and the movable plug (8) divides the internal space of the valve cover (2) into an upper air pressure chamber and a lower air pressure chamber.

7. A coaxial stop valve according to claim 1, characterized in that: A lower diaphragm flap (6) is provided in the middle of the lower valve stem (4), and the bottom of the lower diaphragm flap (6) is connected to the top of the valve body (1) by means of screws.

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