Lengthened gate valve

Abstract

The utility model discloses a lengthened gate valve, which relates to the technical field of gate valves and comprises a valve body, an upper valve cover is mounted at the top end of the valve body through a bolt, a mounting sleeve is fixedly connected to the top end of the upper valve cover, and a lower valve rod and an upper valve rod are inserted into the mounting sleeve. A connecting unit used for fixedly connecting the lower valve rod and the upper valve rod is arranged in the mounting sleeve, the connecting unit comprises the same mounting block connected to the lower valve rod and the upper valve rod in a sleeving mode, and protruding blocks are arranged at the end of the lower valve rod and the end of the upper valve rod correspondingly. And slots are formed in the upper and lower ends of the mounting block. By arranging the installation sleeve, the lower valve rod, the upper valve rod, the protruding block, the installation block, the inserting groove, the sliding groove, the limiting block and the screw, stable connection between the lower valve rod and the upper valve rod is achieved, the connection structure is integrally arranged, the mechanical performance is high, and the service life is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to an extended gate valve. Background Art

[0002] Due to different places of use, some gate valves have a very high overall height. For example, buried gate valves need to be buried underground, so the overall height of the gate valve is very high. As the overall height of the gate valve increases, the corresponding valve stem also becomes longer. However, the result of the longer valve stem is that the valve stem becomes easy to break.

[0003] For example, the Chinese patent publication number CN206904341U discloses a pneumatic extended stem gate valve with a segmented valve stem. The pneumatic extended stem gate valve includes a valve body, a valve cover, a gate plate, and a valve stem, and is characterized in that the valve stem is formed by connecting an upper valve stem and a lower valve stem through a connector, and the connector is composed of two left and right connectors, the connector has a connecting part and two upper and lower limiting parts, and a limiting groove is provided between the upper and lower limiting parts, and upper grooves are provided on the left and right surfaces of the lower part of the upper valve stem, and lower grooves are provided on the left and right surfaces of the upper part of the lower valve stem, and the two limiting parts located at the upper part of the two connectors are respectively placed in the two upper grooves of the upper valve stem. In this pneumatic extended stem gate valve, since the valve stem is segmented into an upper valve stem and a lower valve stem, and then connected by a connector, the entire valve stem is more solid and easier to manufacture.

[0004] The above-mentioned extended gate valve adopts a segmented valve stem instead of the existing integrated longer valve stem structure. Although it makes the valve stem more solid and less prone to damage, the connection structure adopted by the segmented valve stem is to fix the two connecting bodies through multiple bolt structures. The structure is not strong enough, the mechanical properties are poor, and it is easy to be damaged by force. Therefore, the present application provides an extended gate valve to meet the needs. Utility Model Content

[0005] The main purpose of the utility model is to provide an extended gate valve, which can effectively solve the problem of poor mechanical performance and easy damage of the valve stem connection structure used in the existing segmented extended gate valve mentioned in the background technology, and achieve the purpose of stably connecting the two valve stems while improving the mechanical performance and increasing the service life.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an extended gate valve, including a valve body, an upper valve cover is installed on the top of the valve body by bolts, the top of the upper valve cover is fixedly connected with a mounting sleeve, a lower valve stem and an upper valve stem are inserted in the mounting sleeve, a connecting unit for fixedly connecting the lower valve stem and the upper valve stem is provided in the mounting sleeve, the connecting unit includes the same mounting block sleeved on the lower valve stem and the upper valve stem, the ends of the lower valve stem and the upper valve stem are both provided with protrusions, the upper and lower ends of the mounting block are both provided with slots, and the ends of the lower valve stem and the upper valve stem are respectively inserted in the two slots, a pair of slide grooves are provided in the mounting block, and the slots are connected to the slide grooves, and the protrusions are inserted in the slide grooves.

[0007] Preferably, a valve is installed at the bottom end of the lower valve stem.

[0008] Preferably, a limiting block is inserted at the position where the slot communicates with the slide groove, a screw is threadedly connected to the mounting block, and one end of the screw is threadedly connected to the limiting block.

[0009] Preferably, it further comprises a driving unit for driving the valve to be lifted or lowered, wherein the driving unit comprises a protective cover fixedly connected to the top end of the mounting sleeve, and a top cover is fixedly connected to the top end of the protective cover.

[0010] Preferably, a pair of first connecting rings are sleeved on the upper valve stem, one of which is fixedly connected to the upper valve stem, and both sides of each of the first connecting rings are rotatably connected to connecting rods via pins, and the ends of the two connecting rods on one side are rotatably connected to the same second connecting ring, and the ends of the two connecting rods on the other side are rotatably connected to the same third connecting ring.

[0011] Preferably, a screw is rotatably connected to the protective cover, one end of the screw is threadedly connected to the third connecting ring, and the other end of the screw is fixedly connected to a handle.

[0012] Preferably, a connecting shaft is fixedly connected inside the protective cover, and the second connecting ring is slidably connected to the connecting shaft.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. By setting the installation sleeve, the lower valve stem, the upper valve stem, the protrusion, the installation block, the slot, the slide groove, the limit block and the screw, a stable connection between the lower valve stem and the upper valve stem is achieved, and the connection structure is integrated, with high mechanical properties, which greatly improves the service life.

[0015] 2. A driving structure for driving the upper valve to rise and fall is formed by arranging a screw, a connecting shaft, a first connecting ring, a second connecting ring, a third connecting ring and a connecting rod. In the process of driving the valve to rise and fall, the force direction of the upper and lower valve stems is always along the axial direction, thereby reducing the torsional force and increasing the service life of the upper and lower valve stems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the extended gate valve;

[0017] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0018] Figure 3 It is a partially cutaway three-dimensional enlarged structural schematic diagram of the mounting block;

[0019] Figure 4 It is a schematic diagram of the three-dimensional enlarged structure of the lower valve stem;

[0020] Figure 5 for Figure 1 Schematic diagram of the enlarged structure of area B in the middle.

[0021] In the figure: 1. valve body; 2. upper valve cover; 3. mounting sleeve; 4. lower valve stem; 5. upper valve stem; 6. bump; 7. mounting block; 8. slot; 9. slide groove; 10. limit block; 11. screw; 12. protective cover; 13. top cover; 14. screw; 15. connecting shaft; 16. first connecting ring; 17. second connecting ring; 18. third connecting ring; 19. connecting rod. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 according to specific circumstances.

[0025] Example 1: Reference Figure 1-4 An extended gate valve shown in the figure comprises a valve body 1, an upper valve cover 2 is installed on the top of the valve body 1 by bolts, a mounting sleeve 3 is fixedly connected to the top of the upper valve cover 2, a lower valve stem 4 and an upper valve stem 5 are inserted in the mounting sleeve 3, a valve is installed at the bottom end of the lower valve stem 4, a connecting unit for fixedly connecting the lower valve stem 4 and the upper valve stem 5 is arranged in the mounting sleeve 3, the connecting unit comprises the same mounting block 7 sleeved on the lower valve stem 4 and the upper valve stem 5, a protrusion 6 is arranged at the end of the lower valve stem 4 and the upper valve stem 5, slots 8 are provided at the upper and lower ends of the mounting block 7, and the ends of the lower valve stem 4 and the upper valve stem 5 are respectively inserted in the two slots 8, a pair of slide grooves 9 are provided in the mounting block 7, and the slots 8 are connected with the slide grooves 9, and the protrusions 6 are inserted in the slide grooves 9.

[0026] During installation, insert one end of the lower valve stem 4 and the upper valve stem 5 with the protrusion 6 into the slot 8, and then rotate and insert it into the slide groove 9 until it is blocked by the end of the slide groove 9. In this way, the quick installation is completed. The overall structure of the mounting block 7 replaces the existing non-integrated structure, which has higher structural strength and is easy to install.

[0027] A limiting block 10 is inserted at the position where the slot 8 and the slide groove 9 are connected. A screw 11 is threadedly connected to the mounting block 7, and one end of the screw 11 is threadedly connected to the limiting block 10. After the protrusion 6 is inserted into the slide groove 9, the limiting block 10 is inserted into the connecting part of the slot 8 and the slide groove 9 along the slot 8, so that the threaded hole on the limiting block 10 is aligned with the mounting hole on the mounting block 7, and then the screw 11 is screwed through the mounting block 7 and tightened on the limiting block 10 to complete the limiting work after the lower valve stem 4 and the upper valve stem 5 are installed, so that the lower valve stem 4 and the upper valve stem 5 are restricted by the connecting rod 19 and cannot be pulled out, thereby improving the stability of the installation of the lower valve stem 4 and the upper valve stem 5.

[0028] Embodiment 2: Embodiment 1 is further optimized, specifically, as Figure 1 and Figure 5As shown, it also includes a driving unit for driving the valve to lift and lower, the driving unit includes a protective cover 12 fixedly connected to the top of the mounting sleeve 3, the top of the protective cover 12 is fixedly connected to a top cover 13, a pair of first connecting rings 16 are sleeved on the upper valve stem 5, one of the first connecting rings 16 is fixedly connected to the upper valve stem 5, both sides of each first connecting ring 16 are rotatably connected to connecting rods 19 through pins, the ends of the two connecting rods 19 on one side are rotatably connected to the same second connecting ring 17, and the ends of the two connecting rods 19 on the other side are rotatably connected to the same third connecting ring 18, a screw rod 14 is rotatably connected to the protective cover 12, and one end of the screw rod 14 is threadedly connected to the third connecting ring 18, and the other end of the screw rod 14 is fixedly connected to a handle, a connecting shaft 15 is fixedly connected inside the protective cover 12, and the second connecting ring 17 is slidably connected to the connecting shaft 15, and the setting of the connecting shaft 15 provides guidance for the movement of the second connecting ring 17, thereby improving the stability of the driving unit structure.

[0029] When the valve needs to be opened and closed, the third connecting ring 18 is driven to move by rotating the screw 14, and the first connecting ring 16 is driven to move with the cooperation of multiple connecting rods 19 and the second connecting ring 17. Since one of the first connecting rings 16 is fixed on the top cover 13, the upper valve stem 5 on the other first connecting ring 16 is driven to rise and fall with the movement of the third connecting ring 18, and then the lower valve stem 4 is driven to rise and fall with the cooperation of the connecting unit, and then the valve is driven to rise and fall, so as to realize the opening and closing of the valve, replacing the existing valve opening and closing structure, so that the force direction of the lower valve stem 4 and the upper valve stem 5 is always along the axial direction, reducing the torsional force, thus improving the service life of the lower valve stem 4 and the upper valve stem 5, and having high practicality. Of course, the screw 14 can be removed as needed, and a cylinder can be installed on the top cover 13. The cylinder is a prior art and is not shown in the figure. The upper valve stem 5 is driven to rise and fall by the cylinder to realize automatic driving of the opening and closing of the valve, further improving the practicality.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An extended gate valve, comprising a valve body (1), a top end of the valve body (1) being mounted with an upper valve cover (2) by means of bolts, wherein: The top end of the upper valve cover (2) is fixedly connected to a mounting sleeve (3), and a lower valve stem (4) and an upper valve stem (5) are inserted into the mounting sleeve (3). A connecting unit for fixedly connecting the lower valve stem (4) and the upper valve stem (5) is provided in the mounting sleeve (3), and the connecting unit comprises a same mounting block (7) sleeved on the lower valve stem (4) and the upper valve stem (5), and the ends of the lower valve stem (4) and the upper valve stem (5) are provided with a protrusion (6), and the upper and lower ends of the mounting block (7) are provided with slots (8), and the ends of the lower valve stem (4) and the upper valve stem (5) are respectively inserted into the two slots (8), and a pair of slide grooves (9) are provided in the mounting block (7), and the slots (8) are connected to the slide grooves (9), and the protrusions (6) are inserted into the slide grooves (9).

2. An extended gate valve according to claim 1, characterized in that: A valve is installed at the bottom end of the lower valve stem (4).

3. The extended gate valve according to claim 1, characterized in that: A limit block (10) is inserted at a position where the slot (8) communicates with the slide groove (9), a screw (11) is threadedly connected to the mounting block (7), and one end of the screw (11) is threadedly connected to the limit block (10).

4. The extended gate valve according to claim 2, characterized in that: It also comprises a driving unit for driving the valve to move up and down, the driving unit comprising a protective cover (12) fixedly connected to the top end of the mounting sleeve (3), the top end of the protective cover (12) being fixedly connected to a top cover (13).

5. The extended gate valve according to claim 4, characterized in that: A pair of first connecting rings (16) are sleeved on the upper valve stem (5), wherein one of the first connecting rings (16) is fixedly connected to the upper valve stem (5), and both sides of each of the first connecting rings (16) are rotatably connected to connecting rods (19) via pins, wherein the ends of the two connecting rods (19) on one side are rotatably connected to the same second connecting ring (17), and the ends of the two connecting rods (19) on the other side are rotatably connected to the same third connecting ring (18).

6. The extended gate valve according to claim 5, characterized in that: A screw rod (14) is rotatably connected to the protective cover (12), one end of the screw rod (14) is threadedly connected to the third connecting ring (18), and the other end of the screw rod (14) is fixedly connected to a handle.

7. The extended gate valve according to claim 5, characterized in that: A connecting shaft (15) is fixedly connected inside the protective cover (12), and the second connecting ring (17) is slidably connected to the connecting shaft (15).

Images