Lifting type stop valve

Abstract

The utility model relates to the field of valves, in particular to a lifting type stop valve, which mainly solves the problem that the lifting type stop valve in the prior art is easy to cause sealing decline in long-time use, and comprises a valve body, a metal connecting ring, a valve seat, a valve rod, a valve rod sleeve, a rotating handle, an upper plug, a lower plug and an elastic connecting component, the valve body is provided with a first connecting port, a second connecting port and a third connecting port, a medium flow channel communicated with the first connecting port, the second connecting port and the third connecting port is arranged in the valve body, and the upper plug and the lower plug move in the axial direction of the valve rod by rotating the valve rod. A gap is formed between the upper plug and the lower plug, the gap is communicated with the medium flow channel, and the medium flow channel is opened; when the elastic connecting assembly is stressed in the axial direction of the valve rod, the upper plug is attached to the lower plug, and the medium flow channel is closed.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a lifting stop valve. Background Art

[0002] The structure of an existing lift-type stop valve, such as authorization announcement No. CN204573114U, discloses a lift-type stop valve, including a valve body, a valve cover, a valve stem and a valve plate, wherein the valve body and the valve cover form a medium flow channel, the valve cover has a valve stem through hole for installing the valve stem, the valve plate is installed at the tail end of the valve stem to open / close the medium flow channel, the medium flow channel has a straight segment, an arc segment and a disc plate cavity, the side of the straight segment of the medium flow channel is connected to the bottom of the disc plate cavity, the arc segment of the medium flow channel is connected to the side of the disc plate cavity, and the valve plate can open / close the side medium through hole of the straight segment of the medium flow channel as the valve stem moves up and down. The medium flow channel is composed of a straight line segment, an arc segment and a disc plate cavity, wherein the straight line segment and the arc segment of the medium flow channel are staggered. By sealing the side medium through-holes of the straight line segment of the medium flow channel with an ordinary valve plate, it is convenient to open / close the medium flow channel, thereby improving the shut-off effect. However, the shut-off valve is made of metal and has a complex structure and is difficult to prepare, resulting in high cost.

[0003] The applicant applied for an authorization announcement number CN218118681U on August 3, 2022. The patent name is a new type of lift stop valve, which specifically discloses a valve body, wherein the valve body has a first connection port, a second connection port and a medium flow channel connecting the first connection port and the second connection port, and the valve body is provided with a third connection port connected to the medium flow channel, the third connection port is provided with an internal thread, and a valve seat is threadedly connected to the third connection port, the valve seat is provided with a valve stem, and the lower end of the valve stem is provided with a plug, and the plug is moved up and down by rotating the valve stem. The stop valve is arranged by threaded connection between the valve seat and the valve body, which is convenient for installation and disassembly of the valve seat. At the same time, the valve stem is arranged on the valve seat, so that the valve seat can be disassembled together with the valve stem after disassembly, and the third connecting port has an internal thread, so that the valve body after the valve seat is disassembled can form a three-way structure for connecting pipelines or switch valves, thereby improving the scope of use and being highly convenient to use. After the valve seat is connected to the third connecting port of the valve body, the plug at the lower end of the valve stem is moved up and down by rotating the valve stem to realize opening / closing of the medium flow channel. The structure is simple and the operation is convenient.

[0004] However, the plug is made of rubber and has a truncated cone structure. When closing the channel, the plug and the valve body need a larger contact area to achieve sealing. The medium flow usually contains hard particles (such as sand), which makes it easy for the hard particles to be sandwiched between the plug and the valve body. Under a large extrusion pressure, the surface of the plug is easily damaged, which reduces the sealing of the stop valve. Utility Model Content

[0005] Therefore, in view of the above problems, the present utility model provides a lifting globe valve, which mainly solves the problem that the sealing performance of the lifting globe valve in the prior art is likely to decline during long-term use.

[0006] To achieve the above object, the present utility model adopts the following technical solutions:

[0007] A lifting globe valve, comprising a valve body, a metal connecting ring, a valve seat, a valve stem, a valve stem sleeve, a turning handle, an upper plug, a lower plug and an elastic connecting assembly. The valve body has a first connection port, a second connection port and a third connection port. A medium flow channel communicating the first connection port, the second connection port and the third connection port is provided inside the valve body. A support end face protrudes from the middle of the valve body and on the side far from the third connection port. The metal connecting ring is arranged at the third connection port. A first internal thread is provided on the inner surface of the metal connecting ring. The lower part of the valve seat is threadedly connected with the metal connecting ring. The valve stem is rotatably arranged on the valve seat. The turning handle is arranged at the upper end of the valve stem. A first external thread is provided on the outer surface of the valve stem. The valve stem sleeve has a hexagonal prism structure. A second internal thread is provided inside the valve stem sleeve. The lower part of the valve stem is threadedly connected with the upper part of the valve stem sleeve. The upper plug is arranged on the valve stem sleeve. The lower plug is connected with the valve stem sleeve through the elastic connecting assembly, and the lower plug is distributed on the lower side of the upper plug. By rotating the valve stem, the upper plug and the lower plug move along the axial direction of the valve stem. When the elastic connecting assembly is not stressed along the axial direction of the valve stem, there is a gap between the upper plug and the lower plug. The gap communicates with the medium flow channel, and the medium flow channel is opened. When the elastic connecting assembly is stressed along the axial direction of the valve stem, the upper plug and the lower plug are in contact, and the medium flow channel is closed.

[0008] Furthermore, a upper relief groove is provided on the lower surface of the upper plug, and a lower relief groove is provided on the upper surface of the lower plug. The elastic connecting assembly is distributed in the upper relief groove and the lower relief groove. The elastic connecting assembly includes a connecting rod, a sleeve, a first spring and a second spring. A second external thread is provided on the upper part of the connecting rod. The upper part of the connecting rod is threadedly connected with the lower part of the valve stem sleeve. A convex ring is provided in the middle of the connecting rod. The sleeve is sleeved on the lower part of the connecting rod. The first spring is sleeved on the connecting rod and is distributed between the convex ring and the sleeve. The second spring is inserted into the sleeve and is distributed between the bottom surface of the lower relief groove and the lower end surface of the connecting rod.

[0009] Furthermore, the upper plug includes an upper support frame and a first rubber gasket sleeve sleeved on the side and bottom surfaces of the upper support frame. An upper through hole is provided through the upper support frame along its axial direction. The lower part of the valve stem sleeve penetrates into the upper through hole, and the upper part of the upper support frame is fixedly connected to the outer surface of the valve stem sleeve. The lower part of the upper support frame abuts against the outer surface of the valve stem sleeve. An upper relief groove is formed between the valve stem sleeve and the upper support frame within the upper through hole.

[0010] Furthermore, the upper support frame includes an upper end piece, a first outer side piece, at least two second outer side pieces, at least two inner side pieces, and at least two lower end pieces. The upper side edge of the first outer side piece is connected to the outer side edge of the upper end piece. Each of the second outer side pieces is arranged around the first outer side piece, and the upper side edge of each second outer side piece is connected to the lower side edge of the first outer side piece. The outer side edges of each of the lower end pieces are respectively connected to the lower side edges of each of the second outer side pieces. The lower side edges of each of the inner side pieces are respectively connected to the inner side edges of each of the lower end pieces. A through groove is formed by communication between adjacent two of the second outer side pieces, adjacent two of the lower end pieces, and adjacent two of the inner side pieces. The upper parts of each of the inner side pieces abut against the outer surface of the valve stem sleeve.

[0011] Furthermore, the cross section of the first outer side piece is in an arc structure, so that there is an annular curve on the first outer side piece with the longest distance from the valve stem sleeve. A notch connected to the through groove is provided on the first outer side piece and located on the lower side of the annular curve.

[0012] Furthermore, a support piece is provided on the lower surface of the upper end piece and on the periphery of the upper through hole. The diameter dimension of the support piece is smaller than the diameter dimension of the upper end piece.

[0013] Furthermore, the lower plug includes a lower support frame and a second rubber gasket sleeve sleeved on the lower support frame. The lower support frame includes a left frame body and a right frame body. The left frame body and the right frame body are locked and connected by bolts. Left grooves and right grooves that cooperate with each other are respectively provided on the joint surfaces of the left frame body and the right frame body. When the left frame body and the right frame body are locked and connected, the left groove and the right groove communicate to form a blind hole structure of a lower relief groove. The sleeve body, the convex ring, the first spring, and the second spring are distributed in the lower relief groove.

[0014] Furthermore, mounting grooves communicated with the lower relief groove and mounting holes communicating the mounting grooves with the second rubber gasket sleeve are provided on both the left frame body and the right frame body. A tensioning assembly for improving the fit between the second rubber gasket sleeve at the mounting hole and the medium flow channel is provided on the lower support frame at the mounting groove.

[0015] Further, the tensioning assembly includes a tensioning frame disposed in the mounting groove, a tensioning piece disposed on one lateral side of the tensioning frame, a first guiding plate disposed on the other lateral side of the tensioning frame, and a second guiding plate disposed on the outer side of the sleeve body. The tensioning pieces are distributed at the mounting holes. The first guiding plate has a first guiding surface with an inclined distribution, and the second guiding plate has a second guiding surface with an inclined distribution. The first guiding surface is in contact with the second guiding surface. Through the axial movement of the sleeve body, the radial movement of the tensioning pieces is driven.

[0016] Further, the tensioning frame includes an upper sliding plate, a lower sliding plate, and a support rod connecting the upper sliding plate and the lower sliding plate.

[0017] By adopting the foregoing technical solution, the beneficial effects of the present utility model are as follows: For this lift check valve, the valve seat is connected to the valve body through a metal connection ring fixed at the third connection port of the valve body, and by rotating the valve stem, the valve stem sleeve is driven to move up and down along the axial direction of the valve stem, thereby driving the upper plug disposed on the valve stem sleeve and the lower plug connected to the valve stem sleeve through an elastic connection assembly to move up and down along the axial direction of the valve stem, realizing the opening and closing of the medium flow channel. This structure is simple, with low manufacturing cost, and can reduce the impact of hard particles contained in the medium on the plug during the closing process of the medium flow channel, improve the service life of the plug, and thus improve durability. At the same time, the sealing effect of the check valve is ensured. Specifically, during the closing process of the medium flow channel, by rotating the valve stem, the valve stem sleeve is driven to move towards each other, and then the upper plug and the lower plug move synchronously downward. When the lower plug abuts against the medium flow channel and the elastic connection assembly is not stressed along the axial direction of the valve stem, the medium flows through the gap between the upper plug and the lower plug, and since the flow area of the gap is much smaller than the flow area of the medium flow channel, the flow rate of the medium is increased, which can avoid the retention of hard particles. Continuing to rotate the valve stem, the elastic connection assembly is compressed, causing the upper plug to continue to move downward. When the elastic connection assembly is compressed under force along the axial direction of the valve stem, the upper plug and the lower plug are in contact, realizing the closing of the medium flow channel, changing the sealing of the traditional check valve from the outer side surface of the plug in contact with the medium flow channel to the end face sealing of the upper plug and the lower plug, which can avoid the wear of the outer side surface of the plug, thereby improving durability and ensuring the sealing performance of the check valve. Description of the Drawings

[0018] Figure 1 is the front view structural schematic diagram of the embodiment of the present utility model;

[0019] Figure 2 is the sectional structural schematic diagram of the embodiment of the present utility model in the closed state of the medium flow channel;

[0020] Figure 3 is the sectional structural schematic diagram of the embodiment of the present utility model in the semi-open state of the medium flow channel;

[0021] Figure 4 It is a schematic cross-sectional structure diagram of the medium flow channel in the open state in the embodiment of the present utility model;

[0022] Figure 5 It is a schematic cross-sectional structure diagram of the valve stem sleeve, upper plug, lower plug and elastic connection assembly in the open state of the medium flow channel in the embodiment of the present utility model;

[0023] Figure 6 It is a schematic cross-sectional structure diagram of the valve stem sleeve, upper plug, lower plug and elastic connection assembly in the closed state of the medium flow channel in the embodiment of the present utility model;

[0024] Figure 7 It is a schematic three-dimensional structure diagram of the upper support frame in the embodiment of the present utility model;

[0025] Figure 8 It is a schematic right view structure diagram of the left frame body in the embodiment of the present utility model.

[0026] Explanation of reference numerals:

[0027] 1. Valve body; 2. Metal connection ring; 3. Valve seat; 4. Valve stem; 5. Valve stem sleeve; 6. Rotating handle; 7. Upper plug; 8. Lower plug; 9. Elastic connection assembly; 10. Spacing; 11. First connection port; 12. Second connection port; 13. Third connection port; 14. Medium flow channel; 15. Support end face; 16. Step groove; 21. First internal thread;

[0028] 30. Tensioning assembly; 31. Tensioning frame; 32. Tensioning piece; 33. First guide plate; 34. Second guide plate; 311. Upper sliding plate; 312. Lower sliding plate; 313. Support rod; 331. First guide surface; 341. Second guide surface;

[0029] 41. First external thread; 51. Second internal thread; 71. Upper relief groove; 72. Upper support frame; 73. First rubber gasket sleeve; 74. Upper through hole; 75. Through groove; 76. Notch;

[0030] 720. Annular curve; 721. Upper end piece; 722. First outer piece; 723. Second outer piece; 724. Inner piece; 725. Lower end piece; 726. Support piece;

[0031] 81. Lower relief groove; 82. Lower support frame; 83. Second rubber gasket sleeve;

[0032] 821. Left frame body; 822. Right frame body; 823. Bolt; 824. Left groove; 825. Right groove; 826. Installation groove; 827. Installation hole;

[0033] 91. Connecting rod; 92. Sleeve body; 93. First spring; 94. Second spring; 95. Second external thread; 96. Convex ring. Detailed implementation manner

[0034] The present utility model will be further described below in conjunction with the accompanying drawings and the detailed implementation manner.

[0035] An embodiment of the present utility model is as follows:

[0036] Refer to Figures 1 to 8 As shown, a lift check valve includes a valve body 1, a metal connection ring 2, a valve seat 3, a valve stem 4, a valve stem sleeve 5, a turning handle 6, an upper plug 7, a lower plug 8, and an elastic connection assembly 9. The valve body 1 has a first connection port 11, a second connection port 12, and a third connection port 13. A medium flow channel 14 communicating the first connection port 11, the second connection port 12, and the third connection port 13 is provided inside the valve body 1. A support end face 15 protrudes from the middle of the valve body 1 and away from the third connection port 13. The metal connection ring 2 is arranged at the third connection port 13. A first internal thread 21 is provided on the inner surface of the metal connection ring 2. The lower part of the valve seat 3 is threadedly connected to the metal connection ring 2. The valve stem 4 is rotatably arranged on the valve seat 3. The turning handle 6 is arranged at the upper end of the valve stem 4. A first external thread 41 is provided on the outer surface of the valve stem 4. The valve stem sleeve 5 has a hexagonal prism structure. A second internal thread 51 is provided inside the valve stem sleeve 5. The lower part of the valve stem 4 is threadedly connected to the upper part of the valve stem sleeve 5. The upper plug 7 is arranged on the valve stem sleeve 5. The lower plug 8 is connected to the valve stem sleeve 5 through the elastic connection assembly 9, and the lower plug 8 is distributed below the upper plug 7. By rotating the valve stem 4, the upper plug 7 and the lower plug 8 move along the axial direction of the valve stem 4. When the elastic connection assembly 9 is not stressed along the axial direction of the valve stem 4, there is a gap 10 between the upper plug 7 and the lower plug 8. The gap 10 communicates with the medium flow channel 14, and the medium flow channel 14 is opened. When the elastic connection assembly 9 is stressed along the axial direction of the valve stem 4, the upper plug 7 and the lower plug 8 are in contact, and the medium flow channel 14 is closed.

[0037] In this lift check valve, the valve seat 3 is connected to the valve body 1 through a metal connecting ring 2 fixed at the third connection port 13 of the valve body 1. By rotating the valve stem 4, the valve stem sleeve 5 is driven to move up and down along the axial direction of the valve stem 4. Thereby, the upper plug 7 provided on the valve stem sleeve 5 and the lower plug 8 connected to the valve stem sleeve 5 through the elastic connection assembly 9 follow the valve stem sleeve 5 to move up and down along the axial direction of the valve stem 4, realizing the opening and closing of the medium flow channel 14. This structure is simple, with low manufacturing cost, and can reduce the impact of hard particles contained in the medium on the plug during the closing process of the medium flow channel 14, improve the service life of the plug, and thus improve durability. At the same time, the sealing effect of the check valve is ensured. Specifically, during the closing process of the medium flow channel 14, by rotating the valve stem 4, the valve stem sleeve 5 is driven to move towards each other, and then the upper plug 7 and the lower plug 8 move downward synchronously. When the lower plug 8 abuts against the medium flow channel 14 and the elastic connection assembly 9 is not stressed along the axial direction of the valve stem 4, the medium flows through the gap 10 between the upper plug 7 and the lower plug 8. And because the flow area of the gap 10 is much smaller than the flow area of the medium flow channel 14, the flow velocity of the medium is increased, which can avoid the retention of hard particles. Continuing to rotate the valve stem 4, the elastic connection assembly 9 is squeezed, causing the upper plug 7 to continue to move downward. When the elastic connection assembly 9 is compressed under force along the axial direction of the valve stem 4, the upper plug 7 and the lower plug 8 are in contact, realizing the closing of the medium flow channel 14, making the check valve change from the traditional sealing of the outer side of the plug against the medium flow channel 14 to the end face sealing of the upper plug 7 and the lower plug 8, which can avoid the wear of the outer side of the plug, thereby improving durability and ensuring the sealing performance of the check valve.

[0038] Specifically, the lower surface of the upper plug 7 has an upper relief groove 71, the upper surface of the lower plug 8 has a lower relief groove 81, the elastic connection assembly 9 is distributed in the upper relief groove 71 and the lower relief groove 81. The elastic connection assembly 9 includes a connecting rod 91, a sleeve 92, a first spring 93 and a second spring 94. The upper part of the connecting rod 91 is provided with a second external thread 95, and the upper part of the connecting rod 91 is threadedly connected to the lower part of the valve stem sleeve 5. The middle part of the connecting rod 91 is provided with a convex ring 96. The sleeve 92 is sleeved on the lower part of the connecting rod 91. The first spring 93 is sleeved on the connecting rod 91 and is distributed between the convex ring 96 and the sleeve 92. The second spring 94 is disposed in the sleeve 92 and is distributed between the bottom surface of the lower relief groove 81 and the lower end surface of the connecting rod 91. Through the upper relief groove 71 and the lower relief groove 81 respectively provided on the upper plug 7 and the lower plug 8, the elastic connection assembly 9 can be accommodated, ensuring the fitting tightness between the upper plug 7 and the lower plug 8. And during use, when the valve stem sleeve 5 drives the upper plug 7 and the lower plug 8 to move towards each other, after the lower plug 8 abuts against the medium flow channel 14, the connecting rod 91 pushes the sleeve 92 to move towards each other through the first spring 93, and at the same time compresses the second spring 94. Such a design can realize the design of the first spring 93 and the second spring 94 in a smaller space, so that after the upper plug 7 and the lower plug 8 are fitted, double locking is achieved, improving the fitting tightness. And the subsequent cooperation with the tensioning assembly further improves the sealing effect of the upper plug and the lower plug.

[0039] Moreover, the upper plug 7 includes an upper support frame 72 and a first rubber gasket sleeve 73 sleeved on the side and bottom surfaces of the upper support frame 72. An upper through hole 74 is formed through the upper support frame 72 in its axial direction. The lower part of the valve stem sleeve 5 penetrates into the upper through hole 74, and the upper part of the upper support frame 72 is fixedly connected to the outer surface of the valve stem sleeve 5. The lower part of the upper support frame 72 abuts against the outer surface of the valve stem sleeve 5. An upper relief groove 71 is formed between the valve stem sleeve 5 and the upper support frame 72 in the upper through hole 74. Further, the upper support frame 72 includes an upper end piece 721, a first outer side piece 722, two second outer side pieces 723, two inner side pieces 724 and two lower end pieces 725. The upper side edge of the first outer side piece 722 is connected to the outer side edge of the upper end piece 721. Each of the second outer side pieces 723 is disposed around the first outer side piece 722, and the upper side edge of each second outer side piece 723 is connected to the lower side edge of the first outer side piece 722. The outer side edges of each of the lower end pieces 725 are respectively connected to the lower side edges of the corresponding second outer side pieces 723. The lower side edges of each of the inner side pieces 724 are respectively connected to the inner side edges of the corresponding lower end pieces 725. A through groove 75 is formed by communication between adjacent two of the second outer side pieces 723, between adjacent two of the lower end pieces 725 and between adjacent two of the inner side pieces 724. The upper parts of each of the inner side pieces 724 abut against the outer surface of the valve stem sleeve 5. The cross section of the first outer side piece 722 is in an arc structure, so that there is an annular curve 720 on the first outer side piece 722 with the longest distance from the valve stem sleeve 5. A notch 76 connected to the through groove 75 is formed on the first outer side piece 722 and below the annular curve 720.

[0040] During use, when the upper plug 7 moves downward to close the medium flow channel 14, the first rubber gasket sleeve 73 sleeved on the upper support frame 72 can improve the sealing performance with the inner wall of the valve body 1. Moreover, the first outer side piece 722 with an arc-shaped cross section on the upper support frame 72 abuts against the inner wall of the valve body 1. During the continuous downward movement of the upper plug 7, the first outer side piece 722 is squeezed to deform, thereby driving the second outer side piece 722, the lower end piece 725 and the inner side piece 724 to swing outward. The upper part of the inner side piece 724 abuts against the outer surface of the valve stem sleeve 5 to play a supporting role, so that the second outer side piece 723 and the lower end piece 725 form a slight outward swing, thereby driving the first rubber gasket sleeve 73 to fit more closely to the inner side wall of the valve body 1 and the upper end surface of the lower plug 8, and further improving the sealing performance.

[0041] In this embodiment, a support sheet 726 is provided on the lower surface of the upper end sheet 721 and located on the circumferential side of the upper through hole 74. The diameter of the support sheet 726 is smaller than the diameter of the upper end sheet 721, thereby improving the strength of the upper end sheet 721, thereby improving the connection strength with the valve stem sleeve 5, and avoiding deformation of the first outer sheet 722 during extrusion, thereby ensuring the support of the first outer sheet 722, the second outer sheet 723 and the lower end sheet 725.

[0042] At the same time, the lower plug 8 includes a lower support frame 82 and a second rubber pad 83 sleeved on the lower support frame 82, the lower support frame 82 includes a left frame body 821 and a right frame body 822, the left frame body 821 and the right frame body 822 are locked and connected by bolts 823, and the left frame body 821 and the right frame body 822 are respectively provided with a left groove 824 and a right groove 825 that cooperate with each other on the mating surfaces. When the left frame body 821 and the right frame body 822 are locked and connected, the left groove 824 and the right groove 825 are connected to form a The lower give way groove 81 is a blind hole structure, and the sleeve 92, the convex ring 96, the first spring 93 and the second spring 94 are distributed in the lower give way groove 81. The left frame 821 and the right frame 822 are both provided with a mounting groove 826 connected to the lower give way groove 81 and a mounting hole 827 connecting the mounting groove 826 and the second rubber gasket 83. The lower support frame 82 is provided with a tensioning component 30 located at the mounting groove 826 to improve the fit between the second rubber gasket 83 at the mounting hole 827 and the medium flow channel 14.

[0043] In addition, the tensioning assembly 30 includes a tensioning frame 31 arranged in the installation groove 826, a tensioning sheet 32 ​​arranged on one lateral side of the tensioning frame 31, a first guide plate 33 arranged on the other lateral side of the tensioning frame 31, and a second guide plate 34 arranged on the outer side of the sleeve 92. The tensioning sheet 32 ​​is distributed at the installation hole 827. The first guide plate 33 has an inclined first guide surface 331. The second guide plate 34 has an inclined second guide surface 341. The first guide surface 331 is in contact with the second guide surface 341. The axial movement of the sleeve 92 drives the radial movement of the tensioning sheet 32. The tensioning frame 31 includes an upper slide plate 311, a lower slide plate 312, and a support rod 313 connecting the upper slide plate 311 and the lower slide plate 312.

[0044] When the lower plug moves downward, the valve stem sleeve 5 pushes the connecting rod 91 to push the lower plug 8 downward through the second spring 94. At this time, the first spring 93 is not stressed and the sleeve body 92 does not slide downward, so that the tensioning piece 31 is located at the mounting hole 827. In this way, the second rubber gasket sleeve 83 at the mounting hole 827 is recessed toward the mounting hole 827, creating a gap between the second rubber gasket sleeve 83 and the valve body 1. This avoids the hard particles trapped between the lower plug 8 and the valve body 1 from wearing the outer surface of the second rubber gasket sleeve 83 during the downward movement of the lower plug 8, increasing its service life. And this gap can facilitate the flow of the medium and reduce the water hammer phenomenon. When the lower plug 8 abuts against the valve body 1 and continues to rotate the valve stem 4 to drive the valve stem sleeve 5 downward, the first spring 93 is compressed by the convex ring 96 on the connecting rod 91, thereby pushing the sleeve body 92 to slide downward. Through the cooperation of the second guide plate 34 on the sleeve body 92 and the first guide plate 33 on the tensioning frame 31, the tensioning piece 32 moves outward, thus pushing the second rubber gasket sleeve 83 against the medium flow channel 14. In this way, while reducing the wear of the second rubber gasket sleeve 83, the sealing effect of the globe valve can be improved at the same time, enhancing the convenience of use.

[0045] In this embodiment, stepped grooves 16 are recessed on the outer side surface of the valve body 1 and transversely on both sides of the supporting end surface 15. Through the stepped grooves 16, the structure of the medium flow channel 14 can be adapted to reduce the amount of material used for manufacturing the valve body 1, reduce production costs, and improve the aesthetics.

[0046] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0047] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] Although the present utility model is specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present utility model in terms of form and details without departing from the spirit and scope of the present utility model defined by the appended claims, and all such changes are within the protection scope of the present utility model.

Claims

1. A lifting stop valve, characterized in that: The valve body comprises a valve body, a metal connecting ring, a valve seat, a valve stem, a valve stem sleeve, a turning handle, an upper plug, a lower plug and an elastic connecting component, wherein the valve body has a first connecting port, a second connecting port and a third connecting port, and the valve body has a medium flow channel connecting the first connecting port, the second connecting port and the third connecting port, a supporting end surface is convexly provided on a side of the middle part of the valve body away from the third connecting port, the metal connecting ring is arranged at the third connecting port, the inner surface of the metal connecting ring is provided with a first internal thread, the lower part of the valve seat is threadedly connected with the metal connecting ring, the valve stem is rotatably arranged on the valve seat, the turning handle is arranged at the upper end of the valve stem, and the outer surface of the valve stem is provided with a first External thread, the valve stem sleeve is a hexagonal prism structure, the valve stem sleeve is provided with a second internal thread, the lower part of the valve stem is threadedly connected to the upper part of the valve stem sleeve, the upper plug is arranged on the valve stem sleeve, the lower plug is connected to the valve stem sleeve through an elastic connection component, and the lower plug is distributed on the lower side of the upper plug, the upper plug and the lower plug are moved along the axial direction of the valve stem by rotating the valve stem, when the elastic connection component is not subjected to force along the axial direction of the valve stem, there is a spacing between the upper plug and the lower plug, the spacing is connected to the medium flow channel, and the medium flow channel is opened; when the elastic connection component is subjected to force along the axial direction of the valve stem, the upper plug and the lower plug are fitted together, and the medium flow channel is closed.

2. The lift stop valve according to claim 1, characterized in that: The lower surface of the upper plug has an upper easing groove, the upper surface of the lower plug has a lower easing groove, the elastic connection component is distributed in the upper easing groove and the lower easing groove, the elastic connection component includes a connecting rod, a sleeve, a first spring and a second spring, the upper part of the connecting rod is provided with a second external thread, the upper part of the connecting rod is threadedly connected to the lower part of the valve stem sleeve, the middle part of the connecting rod is provided with a convex ring, the sleeve is sleeved on the lower part of the connecting rod, the first spring is sleeved on the connecting rod and distributed between the convex ring and the sleeve, the second spring is penetrated in the sleeve and distributed between the bottom surface of the lower easing groove and the lower end surface of the connecting rod.

3. The lift stop valve according to claim 2, characterized in that: The upper plug includes an upper support frame and a first rubber gasket sleeve mounted on the side and bottom surfaces of the upper support frame. The upper support frame is provided with an upper through hole along its axial direction. The lower part of the valve stem sleeve passes through the upper through hole, and the upper part of the upper support frame is fixedly connected to the outer surface of the valve stem sleeve. The lower part of the upper support frame abuts against the outer surface of the valve stem sleeve, and an upper yield groove is formed in the upper through hole and between the valve stem sleeve and the upper support frame.

4. The lift stop valve according to claim 3, characterized in that: The upper support frame includes an upper end piece, a first outer piece, at least two second outer pieces, at least two inner pieces and at least two lower end pieces, the upper edge of the first outer piece is connected to the outer edge of the upper end piece, each of the second outer pieces is arranged on the first outer piece, and the upper edge of each second outer piece is connected to the lower edge of the first outer piece, the outer edge of each lower end piece is respectively connected to the lower edge of each second outer piece, and the lower edge of each inner piece is respectively connected to the inner edge of each lower end piece, and two adjacent second outer pieces, two adjacent lower end pieces and two adjacent inner pieces are connected to form a through groove, and the upper part of each inner piece rests on the outer surface of the valve stem sleeve.

5. The lift stop valve according to claim 4, characterized in that: The cross section of the first outer sheet is an arc-shaped structure, so that the first outer sheet has an annular curve with the longest distance from the valve stem sleeve, and a notch connected to the through groove is provided on the first outer sheet and located below the annular curve.

6. The lift stop valve according to claim 5, characterized in that: A support sheet is provided on the lower surface of the upper end sheet and located on the peripheral side of the upper through hole, and the diameter of the support sheet is smaller than the diameter of the upper end sheet.

7. The lift stop valve according to any one of claims 2 to 6, characterized in that: The lower plug includes a lower support frame and a second rubber pad sleeve mounted on the lower support frame, the lower support frame includes a left frame body and a right frame body, the left frame body and the right frame body are connected by bolts, and the mating surfaces of the left frame body and the right frame body are respectively provided with a left groove and a right groove that match each other, when the left frame body and the right frame body are locked and connected, the left groove and the right groove are connected to form a lower give way groove of a blind hole structure, and the sleeve body, the convex ring, the first spring and the second spring are distributed in the lower give way groove.

8. The lift type stop valve according to claim 7, characterized in that: The left frame and the right frame are both provided with mounting grooves connected to the lower give way grooves and mounting holes connecting the mounting grooves and the second rubber gaskets. The lower support frame is provided with a tensioning component located at the mounting groove to improve the fit between the second rubber gasket at the mounting hole and the medium flow channel.

9. The lift type stop valve according to claim 8, characterized in that: The tensioning assembly includes a tensioning frame arranged in the installation groove, a tensioning sheet arranged on one lateral side of the tensioning frame, a first guide plate arranged on the other lateral side of the tensioning frame, and a second guide plate arranged on the outer side of the sleeve. The tensioning sheets are distributed at the installation holes, the first guide plate has an inclined first guide surface, the second guide plate has an inclined second guide surface, the first guide surface is in contact with the second guide surface, and the radial direction movement of the tensioning sheet is driven by the axial direction movement of the sleeve.

10. The lift type stop valve according to claim 9, characterized in that: The tensioning frame comprises an upper slide plate, a lower slide plate and a supporting rod connecting the upper slide plate and the lower slide plate.

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