A multi-functional gate valve

Abstract

This utility model provides a multifunctional gate valve, belonging to the field of valve technology. It solves the problem of inconvenient operation during installation of existing gate valves. This multifunctional gate valve includes a valve body, a valve stem, and a gate plate with an inlet and an outlet. The outer side of the inlet end has a protruding annular flange, and the inner side of the nut has a protruding annular flange. A cylindrical telescopic tube is inserted inside the outlet end, and an annular sealing ring is provided at the end of the outlet end, fitted around the outside of the telescopic tube. A locking nut is threaded onto the outer side of the outlet end. The outer side of the telescopic tube has a second protruding annular flange, and a second nut is fitted around the outer side of the telescopic tube. The inner side of the second nut has a second protruding annular flange that abuts against the second flange. This multifunctional gate valve has the advantage of convenient operation.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a multifunctional gate valve. Background Technology

[0002] Gate valves are widely used in pipeline systems. Traditional gate valves are opened and closed by rotating the valve stem and nut. The rotation of the valve stem and nut is a one-end stroke switch, with a long rotation stroke, slow opening and closing speed, and poor sealing performance.

[0003] To address this, a manual quick-opening and closing gate valve was designed and a Chinese patent was applied for, with application number 201320529483.5 and publication number CN203477392U. This manual quick-opening and closing gate valve includes a valve body, a gate plate housed within the valve body, and a valve stem connected to the gate plate. A valve cover is tightly fitted to the upper end of the valve body, and the valve stem passes through the valve cover and is threadedly connected to the gate plate. A sealing structure is provided between the upper end of the gate plate and the valve body. Packing material is provided between the valve cover and the valve stem, and a packing gland is provided above the packing material. The packing gland and the valve cover are fixedly connected by a cotter pin and a hexagonal nut. A handwheel is connected to the top of the valve stem. The gate plate is a hollow structure. A groove is provided on the inner edge of the connection between the valve body and the valve cover, and lubricating oil is placed in the groove. A sealing ring with transverse stripes is provided on the inner edge of the through hole on the valve cover through which the valve stem passes.

[0004] However, when this manual quick-opening and closing gate valve is installed in a pipeline, because its lateral width is fixed, a space of the same width needs to be cut in the pipeline to allow the gate valve to be installed and connected to the pipelines on both sides of the gate valve. If the cut space is too large, it cannot be effectively connected, making the operation inconvenient. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a multifunctional gate valve that solves the problem of inconvenient operation during installation of existing gate valves.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A multifunctional gate valve includes a valve body with an inlet and an outlet, a rod-shaped valve stem, and a gate plate disposed within the valve body. The inner end of the valve stem extends into the valve body and connects to the gate plate. The inlet has a protruding annular flange on its outer side, a nut fitted onto its outer side, and an annular protruding flange on its inner side that abuts against the flange. A cylindrical telescopic tube is inserted into the outlet, with its outer end extending beyond the outlet. A gap exists between the inner wall of the outlet and the outer surface of the telescopic tube. A [missing information - likely a type of fitting] is provided at the end of the outlet. A circular sealing ring is fitted on the outside of the telescopic pipe. A locking nut is threaded onto the outside of the water outlet. The inner side of the locking nut has an inwardly protruding circular locking flange. When the locking nut is screwed in along the thread, the locking flange and the end of the water outlet can press the sealing ring against each other and make the sealing ring tightly abut against the outside of the telescopic pipe. The outer side of the outer end of the telescopic pipe has a second protruding circular flange. A second nut is fitted on the outside of the telescopic pipe, and the inner side of the second nut has a second protruding circular flange that can abut against the second flange. The valve body is also equipped with a check valve core and a spring that enable unidirectional water flow.

[0008] In this multi-functional gate valve, the nut one and the flange one on the inlet end cooperate to form a swivel structure at the inlet end. Similarly, the nut two and the flange two cooperate to form a swivel structure at the outer end of the telescopic pipe. The telescopic pipe relies solely on the sealing ring to achieve a tight seal with the outlet end, allowing the telescopic pipe to axially expand and contract within the outlet end. The gap between the inner wall of the outlet end and the outer side of the telescopic pipe allows the telescopic pipe to make a small radial swing relative to the outlet end.

[0009] Thus, this multi-functional gate valve, during installation, can utilize the axially expandable and contractible nature of the telescopic tube, making it suitable for installations within a certain range of installation space in pipelines. In other words, even if the installation space in the pipeline is slightly larger, installation can be achieved by pulling out the telescopic tube, reducing the precision requirements for pipeline cutting during installation. Furthermore, even if there is a slight orientation deviation between the connecting pipelines at the inlet and outlet ends of this multi-functional gate valve during actual installation, the connection can be achieved by radially swinging the telescopic tube, making this multi-functional gate valve widely applicable. The union structure at both ends allows for convenient installation in pipelines without considering the circumferential angle of the valve body, making installation and operation quite convenient. In addition, the inclusion of a check valve core and spring in the valve body enables this multi-functional gate valve to have a check function, further enhancing its versatility.

[0010] In the aforementioned multi-functional gate valve, the outlet end has a tapered guide surface with a diameter that gradually increases from the inside out. The sealing ring has a tapered surface on the side facing the outlet end, and this tapered surface abuts against the guide surface. The cooperation between the guide surface and the tapered surface allows the sealing ring to retract more effectively when the locking nut is screwed in, thus limiting and sealing the telescopic pipe.

[0011] In the aforementioned multi-functional gate valve, an annular mounting seat is located between the telescopic pipe and the gate plate at the outlet end. The mounting seat is fixed to the outlet end by a long, narrow support arm fixed to the outside of the mounting seat. The check valve core includes a rod-shaped rod and a disc-shaped sealing part. The rod passes through the mounting seat, and the spring is sleeved on the outside of the rod, with both ends of the spring abutting against the sealing part and the mounting seat, respectively. The valve body has a protruding annular shoulder, and the sealing part of the check valve core can abut against the shoulder under the elastic force of the spring to form a seal. Placing the check valve core and spring inside the outlet end instead of inside the telescopic pipe not only makes installation more convenient but also provides more space inside the outlet end, preventing a significant impact on the water flow rate due to the placement of the check valve core and spring, thus ensuring the water output.

[0012] In the aforementioned multi-functional gate valve, a recessed hole is provided at the center of the end of the sealing part of the check valve core, and an annular sealing groove is provided on the outer side of the sealing part, with a sealing gasket placed inside the sealing groove. The recessed hole concentrates the force on the check valve core when water flows onto it, ensuring the stability of the check valve core's movement when it opens.

[0013] Compared with existing technologies, this multifunctional gate valve has the following advantages:

[0014] 1. When installing this multi-functional gate valve, the axial extension and retraction of the telescopic tube can be utilized, making it suitable for installation in pipelines with a certain range of installation space. In other words, even if the installation space in the pipeline is slightly large, it can be installed by pulling out the telescopic tube, which reduces the accuracy requirements for pipeline cutting during installation and improves the applicability of this multi-functional gate valve.

[0015] 2. Because there is a gap between the inner wall of the outlet end and the outer side of the telescopic pipe, and the telescopic pipe and the outlet end are only sealed by a sealing ring, the telescopic pipe can be radially deflected relative to the outlet end. Therefore, even if there is a slight orientation deviation in the connecting pipes at the inlet and outlet ends of this multi-functional gate valve during actual installation, the connection can be achieved by radially swinging the telescopic pipe, making this multi-functional gate valve widely applicable.

[0016] 3. With its union structure at both ends, this multi-functional gate valve can be easily installed in pipelines without considering the circumferential angle of the valve body, making installation and operation relatively convenient. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of this multi-functional gate valve.

[0018] In the diagram, 1. Valve body; 11. Inlet end; 12. Outlet end; 13. First retaining flange; 14. Guide surface; 15. Mounting base; 16. Support arm; 17. Shoulder; 2. Valve stem; 3. Gate; 4. Nut one; 41. First retaining flange; 5. Telescopic tube; 51. Second retaining flange; 6. Sealing ring; 61. Conical surface; 7. Locking nut; 71. Locking retaining flange; 8. Nut two; 81. Second retaining flange; 9. Check valve core; 91. Stem; 92. Sealing part; 93. Recessed hole; 94. Sealing gasket; 10. Spring. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 As shown, this multi-functional gate valve includes a valve body 1 with an inlet end 11 and an outlet end 12, a rod-shaped valve stem 2, a gate plate 3 disposed within the valve body 1, and an operating handle. The inner end of the valve stem 2 extends into the valve body 1 and connects to the gate plate 3. A magnetic locking structure is provided between the outer end of the valve stem 2 and the operating handle. Here, the specific connection structure between the valve stem 2 and the gate plate 3, as well as the magnetic locking structure, are existing technologies and will not be described in detail.

[0021] The outer side of the water inlet end 11 of the valve body 1 has a protruding annular retaining edge 13. A cylindrical nut 4 is fitted on the outer side of the water inlet end 11. The inner side of the nut 4 has a protruding annular flange 41, and the flange 41 can abut against the end face of the retaining edge 13 facing one end of the valve body 1.

[0022] A cylindrical telescopic tube 5 is inserted inside the water outlet 12, with the outer end of the telescopic tube 5 extending out of the water outlet 12. There is a gap between the inner wall of the water outlet 12 and the outer side of the telescopic tube 5, allowing the telescopic tube 5 to swing radially relative to the water outlet 12. An annular sealing ring 6 is provided at the end of the water outlet 12, which is sleeved on the outside of the telescopic tube 5. A cylindrical locking nut 7 is threaded to the outside of the water outlet 12. The inner side of the locking nut 7 has an inwardly protruding annular locking flange 71. When the locking nut 7 is screwed in along the thread, the locking flange 71 and the end of the water outlet 12 can press the sealing ring 6 against each other, making the sealing ring 6 tightly abut against the outside of the telescopic tube 5. In this embodiment, both the inlet end 11 and the outlet end 12 are cylindrical and are threadedly connected to the valve body 1 respectively; the end of the outlet end 12 has a conical guide surface 14, and the diameter of the guide surface 14 gradually increases from the inside to the outside. The sealing ring 6 has a conical surface 61 on the side facing the end of the outlet end 12, and the conical surface 61 is in contact with the guide surface 14.

[0023] The outer side of the telescopic tube 5 has a protruding annular flange 51. The outer side of the telescopic tube 5 is fitted with a cylindrical nut 8, and the inner side of the nut 8 has a protruding annular flange 81 that can abut against the end face of the flange 51 facing the valve body 1.

[0024] An annular mounting base 15 is located inside the outlet end 12 between the telescopic pipe 5 and the gate 3. The mounting base 15 is connected to the outlet end 12 by several elongated support arms 16 fixed to the outside of the mounting base 15. The valve body 1 is also equipped with a check valve core 9 and a spring 10 that enable unidirectional water flow. The check valve core 9 includes a rod-shaped part 91 and a disc-shaped sealing part 92. The rod part 91 passes through the mounting base 15, and the spring 10 is sleeved on the outside of the rod part 91. The two ends of the spring 10 abut against the sealing part 92 and the mounting base 15, respectively. The valve body 1 has a protruding annular shoulder 17. The sealing part 92 of the check valve core 9 can abut against the shoulder 17 under the elastic force of the spring 10 and form a seal to block the flow of water inside the valve body 1. In this embodiment, the sealing part 92 of the check valve core 9 has a recessed hole 93 at the center of the end facing the shoulder 17, and an annular sealing groove is provided on the outer side of the sealing part 92, and a sealing gasket 94 is provided in the sealing groove.

[0025] In this multi-functional gate valve, the nut 4 and the flange 13 on the inlet end 11 cooperate to form a swivel structure at the inlet end 11. Similarly, the nut 8 and the flange 51 cooperate to form a swivel structure at the outer end of the telescopic pipe 5. The telescopic pipe 5 relies solely on the sealing ring 6 to achieve a tight seal with the outlet end 12, allowing the telescopic pipe 5 to axially extend and retract within the outlet end 12. The gap between the inner wall of the outlet end 12 and the outer side of the telescopic pipe 5 allows the telescopic pipe 5 to make a small radial swing relative to the outlet end 12.

[0026] Thus, when installing this multi-functional gate valve, the axial extension and retraction of the telescopic tube 5 can be utilized, making it suitable for installations in pipelines with a certain range of installation space. In other words, even if the installation space in the pipeline is slightly large, it can be installed by pulling out the telescopic tube 5, reducing the precision requirements for pipeline cutting during installation. At the same time, even if there is a slight orientation deviation in the connecting pipeline between the inlet end 11 and the outlet end 12 of this multi-functional gate valve during actual installation, the connection can be achieved by radially swinging the telescopic tube 5, making this multi-functional gate valve widely applicable.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A multifunctional gate valve, comprising a valve body (1) having an inlet end (11) and an outlet end (12), a rod-shaped valve stem (2), and a gate plate (3) disposed within the valve body (1), wherein the inner end of the valve stem (2) extends into the valve body (1) and is connected to the gate plate (3), characterized in that, The outer side of the water inlet (11) has a protruding annular flange (13), and the outer side of the water inlet (11) is fitted with a nut (4). The inner side of the nut (4) has a protruding annular flange (41), and the flange (41) can abut against the flange (13). The water outlet (12) is fitted with a cylindrical telescopic tube (5), and the outer end of the telescopic tube (5) extends out of the water outlet (12). There is a gap between the inner wall of the water outlet (12) and the outer side of the telescopic tube (5) that allows the telescopic tube (5) to swing radially relative to the water outlet (12). The end of the water outlet (12) is provided with an annular sealing ring (6) fitted on the outer side of the telescopic tube (5). The outer thread is connected to a locking nut (7). The inner side of the locking nut (7) has an inwardly protruding annular locking flange (71). When the locking nut (7) is screwed in along the thread, the locking flange (71) and the end of the water outlet (12) can press the sealing ring (6) against each other and make the sealing ring (6) tightly abut against the outer side of the telescopic tube (5). The outer side of the outer end of the telescopic tube (5) has a protruding annular flange (51). The outer side of the telescopic tube (5) is fitted with a nut (8). The inner side of the nut (8) has a protruding annular flange (81) that can abut against the flange (51). The valve body (1) is also provided with a check valve core (9) and a spring (10) that can make the water flow in one direction.

2. The multifunctional gate valve according to claim 1, characterized in that, The end of the water outlet (12) has a tapered guide surface (14), and the diameter of the guide surface (14) gradually increases from the inside to the outside. The sealing ring (6) has a tapered surface (61) on the side facing the end of the water outlet (12), and the tapered surface (61) is in contact with the guide surface (14).

3. The multifunctional gate valve according to claim 1 or 2, characterized in that, The outlet end (12) has an annular mounting seat (15) located between the telescopic pipe (5) and the gate (3). The mounting seat (15) is fixed to the outlet end (12) by a long strip-shaped support arm (16) fixed to the outside of the mounting seat (15). The check valve core (9) includes a rod-shaped rod part (91) and a disc-shaped sealing part (92). The rod part (91) passes through the mounting seat (15). The spring (10) is sleeved on the outside of the rod part (91), and the two ends of the spring (10) abut against the sealing part (92) and the mounting seat (15) respectively. The valve body (1) has a protruding annular shoulder (17). The sealing part (92) of the check valve core (9) can abut against the shoulder (17) under the elastic force of the spring (10) and form a seal.

4. The multifunctional gate valve according to claim 3, characterized in that, The sealing part (92) of the check valve core (9) has a recessed hole (93) at the center of its end, and an annular sealing groove is provided on the outer side of the sealing part (92), and a sealing gasket (94) is provided in the sealing groove.

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