Large-diameter high-pressure anti-leakage quick cut-off valve with wear compensation function

Abstract

The utility model relates to a large-caliber high-pressure anti-leakage quick cut-off valve with an abrasion compensation function, which comprises a valve body, an elastic valve core, a sealing body and a driving mechanism, the valve body is of a T-shaped structure, the valve body is further provided with a liquid inlet communicated with the inside of the valve body, and the liquid inlet is positioned between two ends of the valve body; the sealing body is fixedly installed at the lower end opening of the valve body, the valve element is installed in the valve body, and the driving mechanism is installed at the upper end opening of the valve body and connected with the valve element. The valve is simple in structure and reasonable in design, reciprocating motion of the valve element can be achieved, abrasion of the sealing face of the valve is small in the closing and opening process of the valve, the valve element sealing body is composed of the plane disc and the cone frustum which are assembled into a whole through the sealing elastic material, and the cone frustum and the plane disc have certain relative displacement freedom. The valve element sealing face and the valve body sealing face are sealed in a combined mode through a disc face and are sealed in a tangent mode through a valve element cone frustum and a valve body cone frustum hole, two-stage sealing is achieved, and the sealing effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of large-caliber high-pressure valves, in particular to a large-caliber high-pressure anti-leakage quick-cutting valve with a wear compensation function. Background Art

[0002] The existing general valve core (seal) generally uses a threaded or screw structure to rotate the valve core to achieve the movement of the valve core, and the valve core is sealed by fitting with the sealing surface. The valve core fits with the inner wall of the valve cavity to open and close. Due to the relative movement of the sealing surface, the sealing surface will be worn, affecting the sealing effect, and it is easy to cause internal leakage of the valve, and the medium cannot be completely and effectively cut off after the valve is closed. Especially for large-caliber valves, the manufacturing process requirements are high and the assembly is difficult. The valve core can easily reduce the sealing due to wear, which brings great difficulties to production and operation. The valve core fits with the inner wall of the valve cavity to open and close. Due to the friction resistance of the sealing surface, a large torque is required, which is not conducive to manual operation. Utility Model Content

[0003] The utility model provides a large-caliber high-pressure anti-leakage quick cut-off valve with a wear compensation function, aiming to solve the problems in the prior art.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A large-caliber, high-pressure, leak-proof quick-cutting valve with a wear compensation function, comprising a valve body, an elastic valve core, a sealing body and a driving mechanism, wherein the interior of the valve body is hollow, and its upper and lower ends are open respectively; the valve body is also provided with a liquid inlet connected to its interior, and the liquid inlet is located between the two ends of the valve body; the sealing body is fixedly mounted at the lower open end of the valve body, wherein the interior of the sealing body is hollow and both upper and lower ends are open; the valve core is mounted in the valve body, and the driving mechanism is mounted at the upper open end of the valve body, which is connected to the valve core and is used to drive the valve core to move up and down until it is in close contact with or separated from the sealing body.

[0006] The beneficial effects of the utility model are as follows: during use, when the valve core moves downward to fit with the sealing body, the valve is closed and liquid cannot pass through; when the valve core moves upward to separate from the sealing body, the valve is opened, and liquid enters the valve body from the liquid inlet and flows out from the lower end of the valve body, which is convenient to use;

[0007] In addition, the valve core adopts an elastic sealing material, which can be adjusted within a certain range, so that when the sealing of the sealing body is achieved, the valve core and the sealing surface of the sealing body can be closely fitted through a certain deformation of the elastic material.

[0008] The utility model has a simple structure and a reasonable design, and can realize the reciprocating motion of the valve core. The valve sealing surface has little wear during the closing and opening process of the valve. The sealing surface adopts the valve core and the valve body frustum structure to cooperate, and has an automatic compensation function after wear, so the sealing effect is better and the service life is long. The valve core sealing body is composed of a flat disk and a frustum, which are assembled into a whole by sealing elastic material. The frustum and the flat disk have a certain relative displacement freedom. The valve core sealing surface and the valve body sealing surface are sealed by the disk surface combination seal and the valve core frustum and the valve body frustum hole tangent seal, two-stage sealing, and the sealing effect is enhanced.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the internal space of the sealing body decreases from top to bottom, and the space inside the sealing body is a structure with a circular cavity at the upper end, a conical cavity in the middle, and a circular cavity at the lower end; the valve core includes an elastic core body, and the core body has a frustum-shaped structure, which can cooperate with the upper end of the sealing body to form a seal; the driving mechanism is transmission-connected to the core body.

[0011] The beneficial effects of adopting the above-mentioned further scheme are simple structure and reasonable design. The valve core sealing surface adopts a combined structure, and the boss and the cone surface are sealed at two levels. The boss sealing surface and the cone sealing surface are made of elastic sealing materials, which can achieve a certain range of adjustment. Therefore, when the boss sealing is achieved, the cone sealing surface can be tightly fitted through a certain deformation of the elastic material.

[0012] Furthermore, the lower end of the core body is in a cone-shaped structure with a thick upper end and a thin lower end.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that the structural design of the valve core is reasonable, and its sealing surface adopts a combined structure, with two-level sealing of the boss and the cone surface. The boss sealing surface and the cone sealing surface are made of elastic sealing materials, which can achieve a range of adjustment. Therefore, when the boss sealing is achieved, the cone sealing surface can be tightly fitted through a certain deformation of the elastic material.

[0014] Furthermore, the valve core also includes an inverted T-shaped connecting rod, which is vertically arranged and has a lower end fixedly connected to the core body via an elastic plate; the driving mechanism is connected to the connecting rod; a guide plate is fixedly mounted on the connecting rod, and a plurality of grooves are evenly spaced on the edge of the guide plate, and a plurality of convex strips corresponding one-to-one to the plurality of grooves and slidably connected are provided on the inner wall of the valve body.

[0015] The beneficial effects of adopting the above further solution are simple structure, reasonable design, using connecting rods to connect the core body and the driving mechanism, and convenient assembly;

[0016] In addition, the multiple grooves on the guide plate cooperate with the multiple convex strips on the valve body to guide the up and down movement of the valve core, thereby increasing the stability of the up and down movement of the valve core and preventing the valve core from deviating when moving up and down.

[0017] Furthermore, an end cover assembly is fixedly installed at the open upper end of the valve body, and the driving mechanism includes a valve stem, which is vertically arranged and threadedly connected to the end cover assembly; the lower end of the valve stem extends into the end cover assembly and is movably connected to the connecting rod.

[0018] The beneficial effect of adopting the above-mentioned further scheme is that during use, the rotation of the valve stem is converted into up and down movement of the valve stem by utilizing the threaded connection between the end cover assembly and the valve stem. At the same time, the movable connection between the valve stem and the connecting rod is utilized to drive the connecting rod and the core body to move up and down, thereby realizing the fitting and separation of the valve core and the sealing body to realize the opening and closing of the valve. The operation is simple and time-saving.

[0019] Furthermore, an active cavity with a closed lower end and an open upper end is provided in the connecting rod, and the active cavity has a structure with a thin upper part and a thick lower part; the lower end of the valve stem extends to the lower part of the active cavity and is fixedly connected to a limit plate, and the size of the limit plate is larger than the size of the upper part of the active cavity and smaller than the size of the lower part of the active cavity.

[0020] The beneficial effects of adopting the above further scheme are simple structure and reasonable design. The valve stem utilizes the size distribution of the limit plate and the movable cavity in the connecting rod to achieve a movable connection with the connecting rod, so that the valve core can be driven up and down when the valve stem moves up and down. The operation is simple, saving time and effort.

[0021] Furthermore, the end cover assembly includes a sealing cylinder and an end cover, both ends of the sealing cylinder are open, and the lower end thereof is fixedly connected to the upper end of the valve body; the end cover is fixedly connected to the upper end of the sealing cylinder; and the valve stem is threadedly connected to the end cover.

[0022] The beneficial effect of adopting the above further scheme is to use the sealing tube and the end cover to close the upper end of the valve body, and at the same time rotate the valve stem and use the threaded connection between the valve stem and the end cover to realize the up and down movement of the valve stem, so that the valve stem drives the valve core to move up and down, which is easy to operate and saves time and effort.

[0023] Furthermore, the end cover assembly includes a sealing cylinder and an end cover, both ends of the sealing cylinder are open, and the lower end thereof is fixedly connected to the upper end of the valve body; the end cover is rotatably connected to the upper end of the sealing cylinder; and the valve stem is threadedly connected to the end cover.

[0024] The beneficial effect of adopting the above further scheme is to use the sealing tube and the end cover to close the upper end of the valve body, and at the same time rotate the end cover and use the threaded connection between the valve stem and the end cover to realize the up and down movement of the valve stem, so that the valve stem drives the valve core to move up and down, which is easy to operate and saves time and effort.

[0025] Furthermore, a sealing sleeve is fixedly mounted on the lower end of the sealing cylinder, and the sealing sleeve is fitted with the connecting rod.

[0026] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and utilizing the sealing sleeve to further increase the sealing between the valve core and the end cover assembly, reduce friction on the sealing sleeve, and enhance operational reliability.

[0027] Furthermore, the valve body has a T-shaped structure.

[0028] The beneficial effect of adopting the above further solution is that the shape of the valve body is reasonably designed, which can be assembled with the sealing body and the end cover assembly and can also be used for liquid delivery;

[0029] When the upper and lower ends of the valve body need to be replaced due to performance degradation, they can be quickly replaced using standard components, which is easy to maintain and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model when the valve is closed;

[0031] Figure 2 This is a schematic diagram of the structure of the first embodiment of the utility model when the valve is open;

[0032] Figure 3 This is a schematic structural diagram of an end cover assembly in the first embodiment of the utility model;

[0033] Figure 4 This is a structural schematic diagram of the second embodiment of the utility model when the valve is closed;

[0034] Figure 5 This is a structural schematic diagram of the second embodiment of the utility model when the valve is opened;

[0035] Figure 6 This is a structural schematic diagram of an end cover assembly in a second embodiment of the utility model;

[0036] Figure 7 It is a structural schematic diagram of the valve core in the utility model.

[0037] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0038] 1. Valve body; 2. Sealing body; 3. Liquid inlet; 4. Core body; 5. Connecting rod; 6. Valve stem; 7. Limit plate; 8. Sealing cylinder; 9. End cover; 10. Sealing sleeve; 11. Elastic plate; 12. Guide plate. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0043] Example 1

[0044] like Figures 1 to 7As shown, this embodiment provides a large-caliber, high-pressure, leak-proof, quick-cut-off valve with a wear compensation function, comprising a valve body 1, an elastic valve core, a sealing body 2 and a driving mechanism, wherein the interior of the valve body 1 is hollow, and its upper and lower ends are open respectively; the valve body 1 is also provided with a liquid inlet 3 connected to the interior thereof, and the liquid inlet 3 is located between the two ends of the valve body 1; the sealing body 2 is fixedly mounted at the lower open end of the valve body 1, wherein the interior is hollow and both upper and lower ends are open; the valve core is mounted in the valve body 1, and the driving mechanism is mounted at the upper open end of the valve body 1, and is connected to the valve core, and is used to drive the valve core to move up and down until it is in close contact with or separated from the sealing body 2.

[0045] During use, when the valve core moves downward to fit with the sealing body 2, the valve is closed and liquid cannot pass through; when the valve core moves upward to separate from the sealing body 2, the valve is opened, and liquid enters the valve body 1 from the liquid inlet 3 and flows out from the lower end of the valve body, which is convenient to use;

[0046] In addition, the valve core is made of elastic sealing material, which can be adjusted within a certain range. Therefore, when the sealing of the sealing body 2 is achieved, the valve core and the sealing surface of the sealing body 2 can be tightly fitted through a certain deformation of the elastic material.

[0047] Preferably, in this embodiment, the upper and lower ends of the valve body 1 are cylindrical structures respectively.

[0048] In addition, the sealing body 2 is in a cylindrical structure, and a fixing ring is fixedly sleeved on the upper edge thereof, and the fixing ring is used to realize the connection between the sealing body 2 and the lower end of the valve body 1.

[0049] Preferably, in this embodiment, the valve body 1 is divided into three parts for assembly and use. When the upper and lower ends of the valve body are replaced due to performance degradation, standard components can be used for quick replacement, easy maintenance, low cost, and low operating window requirements.

[0050] The present embodiment has a simple structure and a reasonable design, and can realize the reciprocating motion of the valve core. The valve sealing surface has little wear during the closing and opening process of the valve. The sealing surface adopts the valve core and the valve body frustum structure to cooperate, and has an automatic compensation function after wear, so the sealing effect is better and the service life is long. The valve core sealing body is composed of a flat disk and a frustum, which are assembled into a whole by sealing elastic material. The frustum and the flat disk have a certain relative displacement freedom. The valve core sealing surface and the valve body sealing surface are sealed by the disk surface combination seal and the valve core frustum and the valve body frustum hole tangent seal, two-stage sealing, which enhances the sealing effect.

[0051] Example 2

[0052] On the basis of Example 1, in this embodiment, the internal space of the sealing body 2 decreases from top to bottom, and the space inside the sealing body 2 is a structure with a circular cavity at the upper end, a conical cavity in the middle, and a circular cavity at the lower end; the valve core includes an elastic core body 4, and the core body 4 is a frustum-shaped structure, which can cooperate with the upper end of the sealing body 2 to form a seal; the driving mechanism is transmission-connected to the core body 4.

[0053] This solution has a simple structure and a reasonable design. The valve core sealing surface adopts a combined structure, with two-level sealing of the boss and the cone surface. The boss sealing surface and the cone sealing surface are made of elastic sealing materials, which can achieve a certain range of adjustment. In this way, when the boss sealing is achieved, the cone sealing surface can be tightly fitted through a certain deformation of the elastic material.

[0054] Alternatively, the core body 4 may also be a cylindrical structure, and the sealing body 2 may also be a cylindrical structure. However, in this solution, the core body 4 may wear out over time, and the sealing between the valve body and the valve core is poor.

[0055] Based on the above scheme, the sealing fitting surfaces of the movable valve core and the fluid outlet are both frustoconical structures, which can effectively reduce the resistance and wear during the valve core cutting process, help the sealing surface to fit tightly when the valve is closed, and prevent internal leakage in the pipeline.

[0056] After cutting off, the medium pressure in the pipeline acts on the cone-shaped valve core, achieving a good fit and enhancing the valve cutting ability.

[0057] Example 3

[0058] On the basis of Example 2, in this example, the lower end of the core body 4 is in a cone-shaped structure with a thick upper end and a thin lower end.

[0059] The valve core has a reasonable structural design, and its sealing surface adopts a combined structure, with two-stage sealing of the boss and the cone surface. The boss sealing surface and the cone sealing surface are made of elastic sealing materials, which can achieve a range of adjustment. In this way, when the boss sealing is achieved, the cone sealing surface can be tightly fitted through a certain deformation of the elastic material.

[0060] Preferably, in this embodiment, the core body 4 is preferably made of rubber material to further enhance the sealing performance of the valve.

[0061] Alternatively, the core body 4 may also adopt other structures, for example, the core body 4 includes a split-design upper cylindrical structure and a lower conical structure, the lower surface of the upper part of the core body 4 is provided with an annular groove, and a rubber ring is provided in the annular groove; the lower part of the core body 4 is fixedly connected to the rubber ring.

[0062] Example 4

[0063] On the basis of any one of Examples 2 to 3, in this embodiment, the valve core also includes an inverted T-shaped connecting rod 5, which is vertically arranged and whose lower end is fixedly connected to the core body 4 via an elastic plate 11; the driving mechanism is connected to the connecting rod 5; a guide plate 12 is fixedly mounted on the connecting rod 5, and a plurality of grooves are evenly spaced on the edge of the guide plate 12, and a plurality of convex strips are provided on the inner wall of the valve body 1, which correspond one-to-one to the plurality of grooves and are slidably connected.

[0064] This solution has a simple structure and reasonable design. The core 4 and the driving mechanism are connected by a connecting rod 5, which is easy to assemble.

[0065] In addition, the multiple grooves on the guide plate 12 cooperate with the multiple convex strips on the valve body 1 to guide the up and down movement of the valve core, thereby increasing the stability of the up and down movement of the valve core and preventing the valve core from deviating when moving up and down.

[0066] Preferably, in this embodiment, the connecting rod 5 is preferably a cylindrical structure, and its lower end is fixedly connected to the center of the upper end of the core body 4 .

[0067] Preferably, in this embodiment, the elastic plate 11 is preferably a rubber plate, which is preferably a circular plate.

[0068] In addition, the guide plate 12 is preferably a circular plate, which is fixedly sleeved on the connecting rod 5 .

[0069] Preferably, in this embodiment, three grooves are provided at intervals on the guide plate 12 , and the three grooves are respectively located at the positions corresponding to 12 o'clock, 3 o'clock and 6 o'clock of the circular guide plate 12 .

[0070] Example 5

[0071] On the basis of Example 4, in this embodiment, an end cover assembly is fixedly installed at the open upper end of the valve body 1, and the driving mechanism includes a valve stem 6, which is vertically arranged and threadedly connected to the end cover assembly; the lower end of the valve stem 6 extends into the end cover assembly and is movably connected to the connecting rod 5.

[0072] During use, the threaded connection between the end cover assembly and the valve stem 6 is utilized to form a kinematic pair. The rotation of the end cover is converted into the up and down movement of the valve stem 6 through the threaded connection between the valve stem 6 and the end cover assembly. At the same time, the movable connection between the valve stem 6 and the connecting rod 5 is utilized to drive the connecting rod 5 and the core body 4 to move up and down, thereby realizing the fitting and separation of the valve core and the sealing body 2 to realize the opening and closing of the valve. The operation is simple and time-saving.

[0073] The valve stem of the valve can adopt a screw rod to pass through the hollow valve stem to form a rotatable degree. The screw rod is moved by turning the top hand wheel to drive the valve stem to move as a whole and operate the valve.

[0074] Preferably, in this embodiment, the valve stem 6 is preferably a T-shaped stem, which is easy to operate and saves time and effort.

[0075] Example 6

[0076] On the basis of Example 5, in this embodiment, an active cavity with a closed lower end and an open upper end is provided in the connecting rod 5, and the active cavity has a structure with a thin upper part and a thick lower part; the lower end of the valve stem 6 extends to the lower part of the active cavity and is fixedly connected to a limiting plate 7, and the size of the limiting plate 7 is larger than the size of the upper part of the active cavity and smaller than the size of the lower part of the active cavity.

[0077] This solution has a simple structure and a reasonable design. The valve stem 6 realizes a movable connection with the connecting rod 5 by utilizing the size distribution of the limit plate 7 and the movable cavity in the connecting rod 5, so as to drive the valve core to move up and down during the up and down movement of the valve stem 6. The operation is simple and time-saving.

[0078] Preferably, in this embodiment, the above-mentioned active cavity is preferably a cylindrical cavity.

[0079] In addition, the limit plate 7 is preferably a circular plate, which is movably installed in the movable cavity. During the operation of the valve stem 6, it is movably connected to the connecting rod 5 by the limit plate 7, and the valve stem 6 can drive the connecting rod 5 to move up and down, but the connecting rod 5 will not rotate with the valve stem 6.

[0080] Example 7

[0081] On the basis of any one of Embodiment 5 to Embodiment 6, Figures 1 to 3 As shown, in this embodiment, the end cover assembly includes a sealing cylinder 8 and an end cover 9, both ends of the sealing cylinder 8 are open, and the lower end thereof is fixedly connected to the upper end of the valve body 1; the end cover 9 is fixedly connected to the upper end of the sealing cylinder 8; and the valve stem 6 is threadedly connected to the end cover 9.

[0082] This solution utilizes a sealing cylinder 8 and an end cover 9 to seal the upper end of the valve body 1, and simultaneously rotates the valve stem 6 and utilizes the threaded connection between the valve stem 6 and the end cover 9 to achieve the up and down movement of the valve stem 6, thereby enabling the valve stem 6 to drive the valve core to move up and down, which is easy to operate and saves time and effort.

[0083] In the above solution, during operation, the valve stem 6 is manually rotated.

[0084] Based on the above solution, the lower end of the sealing cylinder 8 is connected to the upper end of the valve body 1 by bolts or welding, and at this time, the valve stem 6 is threadedly connected to the thread at the center of the end cover 9.

[0085] In addition, the valve stem 6 is provided with a threaded section that matches the thread of the screw hole.

[0086] Preferably, in this embodiment, the valve stem 6 is preferably a T-shaped stem.

[0087] Example 8

[0088] On the basis of any one of Embodiment 5 to Embodiment 6, Figures 4 to 6 As shown, in this embodiment, the end cover assembly includes a sealing cylinder 8 and an end cover 9, both ends of the sealing cylinder 8 are open, and the lower end thereof is fixedly connected to the upper end of the valve body 1; the end cover 9 is rotatably connected to the upper end of the sealing cylinder 8; the valve stem 6 and the end cover 9 are threadedly matched to form a kinematic pair.

[0089] This solution utilizes a sealing cylinder 8 and an end cover 9 to seal the upper end of the valve body 1. At the same time, the end cover 9 is rotated and the threaded connection between the valve stem 6 and the end cover 9 is utilized to realize the up and down movement of the valve stem 6, thereby enabling the valve stem 6 to drive the valve core to move up and down. The operation is simple, time-saving and labor-saving.

[0090] In the above solution, during operation, the end cover 9 is rotated manually.

[0091] Based on the above scheme, the assembly relationship between the end cover 9 and the sealing cylinder 8 is: a rotating ring is fixedly connected to the lower surface of the end cover 9, an annular groove is provided on the inner side of the rotating ring, and an annular plate is fixedly installed on the upper end edge of the sealing cylinder 8, and the edge of the annular plate extends into the rotating ring and rotates in fit with the rotating ring.

[0092] In addition, the lower end of the sealing cylinder 8 is connected to the upper end of the valve body 1 by bolts.

[0093] Moreover, the valve stem 6 is provided with a threaded section that matches the thread of the screw hole.

[0094] Based on the above solution, since the solution is to manually rotate the end cover, the valve stem 6 can adopt a straight rod structure.

[0095] The above-mentioned Embodiment 7 and Embodiment 8 are parallel solutions.

[0096] Example 9

[0097] On the basis of Example 7 or Example 8, in this embodiment, a sealing sleeve 10 is fixedly installed on the lower end of the sealing cylinder 8, and the sealing sleeve 10 is in contact with the connecting rod 5.

[0098] This solution has a simple structure and a reasonable design. The sealing sleeve 10 is used to further increase the sealing performance between the valve core and the end cover assembly, reduce the friction on the sealing sleeve, and enhance the operating reliability.

[0099] Preferably, in this embodiment, the sealing sleeve 10 is preferably a rubber sleeve, which has a better sealing effect.

[0100] In addition, the connecting rod 5 has a smooth round shaft surface.

[0101] Example 10

[0102] On the basis of the above embodiments, in this embodiment, the valve body 1 is in a T-shaped structure.

[0103] The shape of the valve body 1 is reasonably designed, which can be assembled with the sealing body 2 and the end cover assembly, and can also be used for liquid delivery;

[0104] When the upper and lower ends of the valve body need to be replaced due to performance degradation, they can be quickly replaced using standard components, which is easy to maintain and low cost.

[0105] Based on the above solution, the liquid inlet 3 is located between the center of the valve body 1 and the lower end thereof.

[0106] The working principle of the utility model is as follows:

[0107] During use, when the valve core moves downward to fit with the sealing body 2, the valve is closed and liquid cannot pass through; when the valve core moves upward to separate from the sealing body 2, the valve is opened, and liquid enters the valve body 1 from the liquid inlet 3 and flows out from the lower end of the valve body, which is convenient to use;

[0108] In addition, the threaded connection between the valve stem 6 and the end cover 9 allows the valve stem 6 to drive the valve core to move up and down, so that the valve core and the sealing body 2 are attached or separated to open and close the valve.

[0109] In the valve provided by the utility model, the pressure in the pipeline of the modified structure can be used as the pressure applied to the sealing structure, thereby further enhancing the sealing performance.

[0110] In addition, when the valve core cone or the sealing surface of the valve body cone is worn and its size is reduced (expanded), it can be compensated by the displacement of the valve core to achieve the effect of high-pressure sealing and anti-seepage.

[0111] The sealing surface adopts a frustum cone structure of the valve core and the valve body, which cooperates with each other. The sealing surface is large and the tightness is good. It can effectively compensate for the material wear during operation and greatly extend the life cycle of the valve.

[0112] The valve has a simple structure, is processed and assembled in parts, is easy to control quality, and is easy to operate, maintain and replace parts, which can significantly reduce manufacturing costs and valve operation and maintenance costs.

[0113] The valve core and the sealing surface of the valve core in this valve have almost no contact with the inner wall of the valve body, so the running resistance is small and the cutting speed is fast. If the valve core is arranged vertically, the gravity of the valve core itself also constitutes the driving force for closing the valve, and the torque required for the closing operation is small, which is convenient for quick closing.

[0114] In response to the problems raised by the background technology, the valve sealing structure and the valve body driving structure are optimized. The valve core has reciprocating motion, and the valve sealing surface wears less during closing and opening. The sealing surface adopts the valve core and the valve body conical cone structure to cooperate with each other, and has an automatic compensation function after wear. The potential energy hydraulic drive valve body makes axial motion in the cavity. During the closing process, the movement is simple and the resistance is small, so it can achieve rapid closing and cutting. Because the valve body and the sealing surface have the automatic compensation function, the tightness is further improved. The improved valve has a simple structure and is easy to process and assemble, which further reduces the valve cost and enhances the operation reliability. It is particularly suitable for rapid cutting of large-diameter and high-pressure pipelines for transporting inflammable and explosive fluids such as oil and gas, chemicals, and toxic fluids.

[0115] It should be noted that the present invention only describes the object by taking the liquid solid as an example, and the valve provided by the present invention can also be applicable to other fluids, such as gas, etc.

[0116] In addition, the arrows in the drawings only indicate the direction of liquid flow in the valve body and have no other substantial meaning.

[0117] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0118] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0119] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-caliber high-pressure anti-leakage quick-cut valve with wear compensation function, characterized in that: The invention comprises a valve body (1), an elastic valve core, a sealing body (2) and a driving mechanism, wherein the interior of the valve body (1) is hollow, and the upper and lower ends thereof are open respectively; the valve body (1) is also provided with a liquid inlet (3) connected with the interior thereof, and the liquid inlet (3) is located between the two ends of the valve body (1); the sealing body (2) is fixedly mounted at the open lower end of the valve body (1), wherein the interior of the sealing body (2) is hollow and both the upper and lower ends are open; the valve core is mounted in the valve body (1), and the driving mechanism is mounted at the open upper end of the valve body (1), and is connected to the valve core and is used to drive the valve core to move up and down until it is in close contact with or separated from the sealing body (2).

2. The large-caliber high-pressure anti-leakage quick cut-off valve with wear compensation function according to claim 1 is characterized in that: The internal space of the sealing body (2) decreases from top to bottom, and the space inside the sealing body (2) is a structure in which the upper end is a circular cavity, the middle part is a conical cavity, and the lower end is a circular cavity; the valve core comprises an elastic core body (4), and the core body (4) is a frustum-shaped structure, which can cooperate with the upper end of the sealing body (2) to form a seal; the driving mechanism is in driving connection with the core body (4).

3. The large-caliber high-pressure anti-leakage quick cut-off valve with wear compensation function according to claim 2 is characterized in that: The lower end of the core (4) is in a cone-shaped structure with a thick upper end and a thin lower end.

4. The large-caliber high-pressure anti-leakage quick cut-off valve with wear compensation function according to claim 2 is characterized in that: The valve core also includes an inverted T-shaped connecting rod (5), the connecting rod (5) is vertically arranged, and its lower end is fixedly connected to the core body (4) through an elastic plate (11); the driving mechanism is connected to the connecting rod (5); a guide plate (12) is fixedly mounted on the connecting rod (5), and a plurality of grooves are evenly spaced on the edge of the guide plate (12), and a plurality of convex strips corresponding to the plurality of grooves and slidably connected are provided on the inner wall of the valve body (1).

5. The large-caliber high-pressure anti-leakage quick cut-off valve with wear compensation function according to claim 4 is characterized in that: An end cover assembly is fixedly mounted at the open upper end of the valve body (1); the drive mechanism comprises a valve stem (6), which is vertically arranged and threadedly connected to the end cover assembly; the lower end of the valve stem (6) extends into the end cover assembly and is movably connected to the connecting rod (5).

6. The large-caliber high-pressure anti-leakage quick cut-off valve with wear compensation function according to claim 5 is characterized in that: The connecting rod (5) is provided with an active cavity with a closed lower end and an open upper end, and the active cavity is thin at the upper part and thick at the lower part; the lower end of the valve stem (6) extends to the lower part of the active cavity and is fixedly connected to a limit plate (7), and the size of the limit plate (7) is larger than the size of the upper part of the active cavity and smaller than the size of the lower part of the active cavity.

7. The large-caliber high-pressure anti-leakage quick-cut valve with wear compensation function according to claim 5, characterized in that: The end cover assembly comprises a sealing cylinder (8) and an end cover (9); both ends of the sealing cylinder (8) are open, and the lower end is fixedly connected to the upper end of the valve body (1); the end cover (9) is fixedly connected to the upper end of the sealing cylinder (8); and the valve stem (6) is threadedly connected to the end cover (9).

8. The large-caliber high-pressure anti-leakage quick cut-off valve with wear compensation function according to claim 7 is characterized in that: A sealing sleeve (10) is fixedly mounted on the lower end of the sealing cylinder (8), and the sealing sleeve (10) is in close contact with the connecting rod (5).

9. The large-caliber high-pressure anti-leakage quick-cut valve with wear compensation function according to any one of claims 1 to 7, characterized in that: The valve body (1) is in a T-shaped structure.

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